drivers/net/team/team.c

   1 /*
   2  * drivers/net/team/team.c - Network team device driver
   3  * Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/types.h>
  13 #include <linux/module.h>
  14 #include <linux/init.h>
  15 #include <linux/slab.h>
  16 #include <linux/rcupdate.h>
  17 #include <linux/errno.h>
  18 #include <linux/ctype.h>
  19 #include <linux/notifier.h>
  20 #include <linux/netdevice.h>
  21 #include <linux/netpoll.h>
  22 #include <linux/if_vlan.h>
  23 #include <linux/if_arp.h>
  24 #include <linux/socket.h>
  25 #include <linux/etherdevice.h>
  26 #include <linux/rtnetlink.h>
  27 #include <net/rtnetlink.h>
  28 #include <net/genetlink.h>
  29 #include <net/netlink.h>
  30 #include <net/sch_generic.h>
  31 #include <net/switchdev.h>
  32 #include <generated/utsrelease.h>
  33 #include <linux/if_team.h>
  34
  35 #define DRV_NAME "team"
  36
  37
  38 /**********
  39  * Helpers
  40  **********/
  41
  42 #define team_port_exists(dev) (dev->priv_flags & IFF_TEAM_PORT)
  43
  44 static struct team_port *team_port_get_rcu(const struct net_device *dev)
  45 {
  46         return rcu_dereference(dev->rx_handler_data);
  47 }
  48
  49 static struct team_port *team_port_get_rtnl(const struct net_device *dev)
  50 {
  51         struct team_port *port = rtnl_dereference(dev->rx_handler_data);
  52
  53         return team_port_exists(dev) ? port : NULL;
  54 }
  55
  56 /*
  57  * Since the ability to change device address for open port device is tested in
  58  * team_port_add, this function can be called without control of return value
  59  */
  60 static int __set_port_dev_addr(struct net_device *port_dev,
  61                                const unsigned char *dev_addr)
  62 {
  63         struct sockaddr_storage addr;
  64
  65         memcpy(addr.__data, dev_addr, port_dev->addr_len);
  66         addr.ss_family = port_dev->type;
  67         return dev_set_mac_address(port_dev, (struct sockaddr *)&addr);
  68 }
  69
  70 static int team_port_set_orig_dev_addr(struct team_port *port)
  71 {
  72         return __set_port_dev_addr(port->dev, port->orig.dev_addr);
  73 }
  74
  75 static int team_port_set_team_dev_addr(struct team *team,
  76                                        struct team_port *port)
  77 {
  78         return __set_port_dev_addr(port->dev, team->dev->dev_addr);
  79 }
  80
  81 int team_modeop_port_enter(struct team *team, struct team_port *port)
  82 {
  83         return team_port_set_team_dev_addr(team, port);
  84 }
  85 EXPORT_SYMBOL(team_modeop_port_enter);
  86
  87 void team_modeop_port_change_dev_addr(struct team *team,
  88                                       struct team_port *port)
  89 {
  90         team_port_set_team_dev_addr(team, port);
  91 }
  92 EXPORT_SYMBOL(team_modeop_port_change_dev_addr);
  93
  94 static void team_lower_state_changed(struct team_port *port)
  95 {
  96         struct netdev_lag_lower_state_info info;
  97
  98         info.link_up = port->linkup;
  99         info.tx_enabled = team_port_enabled(port);
 100         netdev_lower_state_changed(port->dev, &info);
 101 }
 102
 103 static void team_refresh_port_linkup(struct team_port *port)
 104 {
 105         bool new_linkup = port->user.linkup_enabled ? port->user.linkup :
 106                                                       port->state.linkup;
 107
 108         if (port->linkup != new_linkup) {
 109                 port->linkup = new_linkup;
 110                 team_lower_state_changed(port);
 111         }
 112 }
 113
 114
 115 /*******************
 116  * Options handling
 117  *******************/
 118
 119 struct team_option_inst { /* One for each option instance */
 120         struct list_head list;
 121         struct list_head tmp_list;
 122         struct team_option *option;
 123         struct team_option_inst_info info;
 124         bool changed;
 125         bool removed;
 126 };
 127
 128 static struct team_option *__team_find_option(struct team *team,
 129                                               const char *opt_name)
 130 {
 131         struct team_option *option;
 132
 133         list_for_each_entry(option, &team->option_list, list) {
 134                 if (strcmp(option->name, opt_name) == 0)
 135                         return option;
 136         }
 137         return NULL;
 138 }
 139
 140 static void __team_option_inst_del(struct team_option_inst *opt_inst)
 141 {
 142         list_del(&opt_inst->list);
 143         kfree(opt_inst);
 144 }
 145
 146 static void __team_option_inst_del_option(struct team *team,
 147                                           struct team_option *option)
 148 {
 149         struct team_option_inst *opt_inst, *tmp;
 150
 151         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 152                 if (opt_inst->option == option)
 153                         __team_option_inst_del(opt_inst);
 154         }
 155 }
 156
 157 static int __team_option_inst_add(struct team *team, struct team_option *option,
 158                                   struct team_port *port)
 159 {
 160         struct team_option_inst *opt_inst;
 161         unsigned int array_size;
 162         unsigned int i;
 163         int err;
 164
 165         array_size = option->array_size;
 166         if (!array_size)
 167                 array_size = 1; /* No array but still need one instance */
 168
 169         for (i = 0; i < array_size; i++) {
 170                 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL);
 171                 if (!opt_inst)
 172                         return -ENOMEM;
 173                 opt_inst->option = option;
 174                 opt_inst->info.port = port;
 175                 opt_inst->info.array_index = i;
 176                 opt_inst->changed = true;
 177                 opt_inst->removed = false;
 178                 list_add_tail(&opt_inst->list, &team->option_inst_list);
 179                 if (option->init) {
 180                         err = option->init(team, &opt_inst->info);
 181                         if (err)
 182                                 return err;
 183                 }
 184
 185         }
 186         return 0;
 187 }
 188
 189 static int __team_option_inst_add_option(struct team *team,
 190                                          struct team_option *option)
 191 {
 192         int err;
 193
 194         if (!option->per_port) {
 195                 err = __team_option_inst_add(team, option, NULL);
 196                 if (err)
 197                         goto inst_del_option;
 198         }
 199         return 0;
 200
 201 inst_del_option:
 202         __team_option_inst_del_option(team, option);
 203         return err;
 204 }
 205
 206 static void __team_option_inst_mark_removed_option(struct team *team,
 207                                                    struct team_option *option)
 208 {
 209         struct team_option_inst *opt_inst;
 210
 211         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 212                 if (opt_inst->option == option) {
 213                         opt_inst->changed = true;
 214                         opt_inst->removed = true;
 215                 }
 216         }
 217 }
 218
 219 static void __team_option_inst_del_port(struct team *team,
 220                                         struct team_port *port)
 221 {
 222         struct team_option_inst *opt_inst, *tmp;
 223
 224         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 225                 if (opt_inst->option->per_port &&
 226                     opt_inst->info.port == port)
 227                         __team_option_inst_del(opt_inst);
 228         }
 229 }
 230
 231 static int __team_option_inst_add_port(struct team *team,
 232                                        struct team_port *port)
 233 {
 234         struct team_option *option;
 235         int err;
 236
 237         list_for_each_entry(option, &team->option_list, list) {
 238                 if (!option->per_port)
 239                         continue;
 240                 err = __team_option_inst_add(team, option, port);
 241                 if (err)
 242                         goto inst_del_port;
 243         }
 244         return 0;
 245
 246 inst_del_port:
 247         __team_option_inst_del_port(team, port);
 248         return err;
 249 }
 250
 251 static void __team_option_inst_mark_removed_port(struct team *team,
 252                                                  struct team_port *port)
 253 {
 254         struct team_option_inst *opt_inst;
 255
 256         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 257                 if (opt_inst->info.port == port) {
 258                         opt_inst->changed = true;
 259                         opt_inst->removed = true;
 260                 }
 261         }
 262 }
 263
 264 static int __team_options_register(struct team *team,
 265                                    const struct team_option *option,
 266                                    size_t option_count)
 267 {
 268         int i;
 269         struct team_option **dst_opts;
 270         int err;
 271
 272         dst_opts = kzalloc(sizeof(struct team_option *) * option_count,
 273                            GFP_KERNEL);
 274         if (!dst_opts)
 275                 return -ENOMEM;
 276         for (i = 0; i < option_count; i++, option++) {
 277                 if (__team_find_option(team, option->name)) {
 278                         err = -EEXIST;
 279                         goto alloc_rollback;
 280                 }
 281                 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
 282                 if (!dst_opts[i]) {
 283                         err = -ENOMEM;
 284                         goto alloc_rollback;
 285                 }
 286         }
 287
 288         for (i = 0; i < option_count; i++) {
 289                 err = __team_option_inst_add_option(team, dst_opts[i]);
 290                 if (err)
 291                         goto inst_rollback;
 292                 list_add_tail(&dst_opts[i]->list, &team->option_list);
 293         }
 294
 295         kfree(dst_opts);
 296         return 0;
 297
 298 inst_rollback:
 299         for (i--; i >= 0; i--)
 300                 __team_option_inst_del_option(team, dst_opts[i]);
 301
 302         i = option_count;
 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         if (!try_module_get(THIS_MODULE))
 484                 return NULL;
 485
 486         spin_lock(&mode_list_lock);
 487         mitem = __find_mode(kind);
 488         if (!mitem) {
 489                 spin_unlock(&mode_list_lock);
 490                 request_module("team-mode-%s", kind);
 491                 spin_lock(&mode_list_lock);
 492                 mitem = __find_mode(kind);
 493         }
 494         if (mitem) {
 495                 mode = mitem->mode;
 496                 if (!try_module_get(mode->owner))
 497                         mode = NULL;
 498         }
 499
 500         spin_unlock(&mode_list_lock);
 501         module_put(THIS_MODULE);
 502         return mode;
 503 }
 504
 505 static void team_mode_put(const struct team_mode *mode)
 506 {
 507         module_put(mode->owner);
 508 }
 509
 510 static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
 511 {
 512         dev_kfree_skb_any(skb);
 513         return false;
 514 }
 515
 516 static rx_handler_result_t team_dummy_receive(struct team *team,
 517                                               struct team_port *port,
 518                                               struct sk_buff *skb)
 519 {
 520         return RX_HANDLER_ANOTHER;
 521 }
 522
 523 static const struct team_mode __team_no_mode = {
 524         .kind           = "*NOMODE*",
 525 };
 526
 527 static bool team_is_mode_set(struct team *team)
 528 {
 529         return team->mode != &__team_no_mode;
 530 }
 531
 532 static void team_set_no_mode(struct team *team)
 533 {
 534         team->user_carrier_enabled = false;
 535         team->mode = &__team_no_mode;
 536 }
 537
 538 static void team_adjust_ops(struct team *team)
 539 {
 540         /*
 541          * To avoid checks in rx/tx skb paths, ensure here that non-null and
 542          * correct ops are always set.
 543          */
 544
 545         if (!team->en_port_count || !team_is_mode_set(team) ||
 546             !team->mode->ops->transmit)
 547                 team->ops.transmit = team_dummy_transmit;
 548         else
 549                 team->ops.transmit = team->mode->ops->transmit;
 550
 551         if (!team->en_port_count || !team_is_mode_set(team) ||
 552             !team->mode->ops->receive)
 553                 team->ops.receive = team_dummy_receive;
 554         else
 555                 team->ops.receive = team->mode->ops->receive;
 556 }
 557
 558 /*
 559  * We can benefit from the fact that it's ensured no port is present
 560  * at the time of mode change. Therefore no packets are in fly so there's no
 561  * need to set mode operations in any special way.
 562  */
 563 static int __team_change_mode(struct team *team,
 564                               const struct team_mode *new_mode)
 565 {
 566         /* Check if mode was previously set and do cleanup if so */
 567         if (team_is_mode_set(team)) {
 568                 void (*exit_op)(struct team *team) = team->ops.exit;
 569
 570                 /* Clear ops area so no callback is called any longer */
 571                 memset(&team->ops, 0, sizeof(struct team_mode_ops));
 572                 team_adjust_ops(team);
 573
 574                 if (exit_op)
 575                         exit_op(team);
 576                 team_mode_put(team->mode);
 577                 team_set_no_mode(team);
 578                 /* zero private data area */
 579                 memset(&team->mode_priv, 0,
 580                        sizeof(struct team) - offsetof(struct team, mode_priv));
 581         }
 582
 583         if (!new_mode)
 584                 return 0;
 585
 586         if (new_mode->ops->init) {
 587                 int err;
 588
 589                 err = new_mode->ops->init(team);
 590                 if (err)
 591                         return err;
 592         }
 593
 594         team->mode = new_mode;
 595         memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
 596         team_adjust_ops(team);
 597
 598         return 0;
 599 }
 600
 601 static int team_change_mode(struct team *team, const char *kind)
 602 {
 603         const struct team_mode *new_mode;
 604         struct net_device *dev = team->dev;
 605         int err;
 606
 607         if (!list_empty(&team->port_list)) {
 608                 netdev_err(dev, "No ports can be present during mode change\n");
 609                 return -EBUSY;
 610         }
 611
 612         if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) {
 613                 netdev_err(dev, "Unable to change to the same mode the team is in\n");
 614                 return -EINVAL;
 615         }
 616
 617         new_mode = team_mode_get(kind);
 618         if (!new_mode) {
 619                 netdev_err(dev, "Mode \"%s\" not found\n", kind);
 620                 return -EINVAL;
 621         }
 622
 623         err = __team_change_mode(team, new_mode);
 624         if (err) {
 625                 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
 626                 team_mode_put(new_mode);
 627                 return err;
 628         }
 629
 630         netdev_info(dev, "Mode changed to \"%s\"\n", kind);
 631         return 0;
 632 }
 633
 634
 635 /*********************
 636  * Peers notification
 637  *********************/
 638
 639 static void team_notify_peers_work(struct work_struct *work)
 640 {
 641         struct team *team;
 642         int val;
 643
 644         team = container_of(work, struct team, notify_peers.dw.work);
 645
 646         if (!rtnl_trylock()) {
 647                 schedule_delayed_work(&team->notify_peers.dw, 0);
 648                 return;
 649         }
 650         val = atomic_dec_if_positive(&team->notify_peers.count_pending);
 651         if (val < 0) {
 652                 rtnl_unlock();
 653                 return;
 654         }
 655         call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, team->dev);
 656         rtnl_unlock();
 657         if (val)
 658                 schedule_delayed_work(&team->notify_peers.dw,
 659                                       msecs_to_jiffies(team->notify_peers.interval));
 660 }
 661
 662 static void team_notify_peers(struct team *team)
 663 {
 664         if (!team->notify_peers.count || !netif_running(team->dev))
 665                 return;
 666         atomic_add(team->notify_peers.count, &team->notify_peers.count_pending);
 667         schedule_delayed_work(&team->notify_peers.dw, 0);
 668 }
 669
 670 static void team_notify_peers_init(struct team *team)
 671 {
 672         INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work);
 673 }
 674
 675 static void team_notify_peers_fini(struct team *team)
 676 {
 677         cancel_delayed_work_sync(&team->notify_peers.dw);
 678 }
 679
 680
 681 /*******************************
 682  * Send multicast group rejoins
 683  *******************************/
 684
 685 static void team_mcast_rejoin_work(struct work_struct *work)
 686 {
 687         struct team *team;
 688         int val;
 689
 690         team = container_of(work, struct team, mcast_rejoin.dw.work);
 691
 692         if (!rtnl_trylock()) {
 693                 schedule_delayed_work(&team->mcast_rejoin.dw, 0);
 694                 return;
 695         }
 696         val = atomic_dec_if_positive(&team->mcast_rejoin.count_pending);
 697         if (val < 0) {
 698                 rtnl_unlock();
 699                 return;
 700         }
 701         call_netdevice_notifiers(NETDEV_RESEND_IGMP, team->dev);
 702         rtnl_unlock();
 703         if (val)
 704                 schedule_delayed_work(&team->mcast_rejoin.dw,
 705                                       msecs_to_jiffies(team->mcast_rejoin.interval));
 706 }
 707
 708 static void team_mcast_rejoin(struct team *team)
 709 {
 710         if (!team->mcast_rejoin.count || !netif_running(team->dev))
 711                 return;
 712         atomic_add(team->mcast_rejoin.count, &team->mcast_rejoin.count_pending);
 713         schedule_delayed_work(&team->mcast_rejoin.dw, 0);
 714 }
 715
 716 static void team_mcast_rejoin_init(struct team *team)
 717 {
 718         INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work);
 719 }
 720
 721 static void team_mcast_rejoin_fini(struct team *team)
 722 {
 723         cancel_delayed_work_sync(&team->mcast_rejoin.dw);
 724 }
 725
 726
 727 /************************
 728  * Rx path frame handler
 729  ************************/
 730
 731 /* note: already called with rcu_read_lock */
 732 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
 733 {
 734         struct sk_buff *skb = *pskb;
 735         struct team_port *port;
 736         struct team *team;
 737         rx_handler_result_t res;
 738
 739         skb = skb_share_check(skb, GFP_ATOMIC);
 740         if (!skb)
 741                 return RX_HANDLER_CONSUMED;
 742
 743         *pskb = skb;
 744
 745         port = team_port_get_rcu(skb->dev);
 746         team = port->team;
 747         if (!team_port_enabled(port)) {
 748                 /* allow exact match delivery for disabled ports */
 749                 res = RX_HANDLER_EXACT;
 750         } else {
 751                 res = team->ops.receive(team, port, skb);
 752         }
 753         if (res == RX_HANDLER_ANOTHER) {
 754                 struct team_pcpu_stats *pcpu_stats;
 755
 756                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
 757                 u64_stats_update_begin(&pcpu_stats->syncp);
 758                 pcpu_stats->rx_packets++;
 759                 pcpu_stats->rx_bytes += skb->len;
 760                 if (skb->pkt_type == PACKET_MULTICAST)
 761                         pcpu_stats->rx_multicast++;
 762                 u64_stats_update_end(&pcpu_stats->syncp);
 763
 764                 skb->dev = team->dev;
 765         } else if (res == RX_HANDLER_EXACT) {
 766                 this_cpu_inc(team->pcpu_stats->rx_nohandler);
 767         } else {
 768                 this_cpu_inc(team->pcpu_stats->rx_dropped);
 769         }
 770
 771         return res;
 772 }
 773
 774
 775 /*************************************
 776  * Multiqueue Tx port select override
 777  *************************************/
 778
 779 static int team_queue_override_init(struct team *team)
 780 {
 781         struct list_head *listarr;
 782         unsigned int queue_cnt = team->dev->num_tx_queues - 1;
 783         unsigned int i;
 784
 785         if (!queue_cnt)
 786                 return 0;
 787         listarr = kmalloc(sizeof(struct list_head) * queue_cnt, GFP_KERNEL);
 788         if (!listarr)
 789                 return -ENOMEM;
 790         team->qom_lists = listarr;
 791         for (i = 0; i < queue_cnt; i++)
 792                 INIT_LIST_HEAD(listarr++);
 793         return 0;
 794 }
 795
 796 static void team_queue_override_fini(struct team *team)
 797 {
 798         kfree(team->qom_lists);
 799 }
 800
 801 static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
 802 {
 803         return &team->qom_lists[queue_id - 1];
 804 }
 805
 806 /*
 807  * note: already called with rcu_read_lock
 808  */
 809 static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
 810 {
 811         struct list_head *qom_list;
 812         struct team_port *port;
 813
 814         if (!team->queue_override_enabled || !skb->queue_mapping)
 815                 return false;
 816         qom_list = __team_get_qom_list(team, skb->queue_mapping);
 817         list_for_each_entry_rcu(port, qom_list, qom_list) {
 818                 if (!team_dev_queue_xmit(team, port, skb))
 819                         return true;
 820         }
 821         return false;
 822 }
 823
 824 static void __team_queue_override_port_del(struct team *team,
 825                                            struct team_port *port)
 826 {
 827         if (!port->queue_id)
 828                 return;
 829         list_del_rcu(&port->qom_list);
 830 }
 831
 832 static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
 833                                                       struct team_port *cur)
 834 {
 835         if (port->priority < cur->priority)
 836                 return true;
 837         if (port->priority > cur->priority)
 838                 return false;
 839         if (port->index < cur->index)
 840                 return true;
 841         return false;
 842 }
 843
 844 static void __team_queue_override_port_add(struct team *team,
 845                                            struct team_port *port)
 846 {
 847         struct team_port *cur;
 848         struct list_head *qom_list;
 849         struct list_head *node;
 850
 851         if (!port->queue_id)
 852                 return;
 853         qom_list = __team_get_qom_list(team, port->queue_id);
 854         node = qom_list;
 855         list_for_each_entry(cur, qom_list, qom_list) {
 856                 if (team_queue_override_port_has_gt_prio_than(port, cur))
 857                         break;
 858                 node = &cur->qom_list;
 859         }
 860         list_add_tail_rcu(&port->qom_list, node);
 861 }
 862
 863 static void __team_queue_override_enabled_check(struct team *team)
 864 {
 865         struct team_port *port;
 866         bool enabled = false;
 867
 868         list_for_each_entry(port, &team->port_list, list) {
 869                 if (port->queue_id) {
 870                         enabled = true;
 871                         break;
 872                 }
 873         }
 874         if (enabled == team->queue_override_enabled)
 875                 return;
 876         netdev_dbg(team->dev, "%s queue override\n",
 877                    enabled ? "Enabling" : "Disabling");
 878         team->queue_override_enabled = enabled;
 879 }
 880
 881 static void team_queue_override_port_prio_changed(struct team *team,
 882                                                   struct team_port *port)
 883 {
 884         if (!port->queue_id || team_port_enabled(port))
 885                 return;
 886         __team_queue_override_port_del(team, port);
 887         __team_queue_override_port_add(team, port);
 888         __team_queue_override_enabled_check(team);
 889 }
 890
 891 static void team_queue_override_port_change_queue_id(struct team *team,
 892                                                      struct team_port *port,
 893                                                      u16 new_queue_id)
 894 {
 895         if (team_port_enabled(port)) {
 896                 __team_queue_override_port_del(team, port);
 897                 port->queue_id = new_queue_id;
 898                 __team_queue_override_port_add(team, port);
 899                 __team_queue_override_enabled_check(team);
 900         } else {
 901                 port->queue_id = new_queue_id;
 902         }
 903 }
 904
 905 static void team_queue_override_port_add(struct team *team,
 906                                          struct team_port *port)
 907 {
 908         __team_queue_override_port_add(team, port);
 909         __team_queue_override_enabled_check(team);
 910 }
 911
 912 static void team_queue_override_port_del(struct team *team,
 913                                          struct team_port *port)
 914 {
 915         __team_queue_override_port_del(team, port);
 916         __team_queue_override_enabled_check(team);
 917 }
 918
 919
 920 /****************
 921  * Port handling
 922  ****************/
 923
 924 static bool team_port_find(const struct team *team,
 925                            const struct team_port *port)
 926 {
 927         struct team_port *cur;
 928
 929         list_for_each_entry(cur, &team->port_list, list)
 930                 if (cur == port)
 931                         return true;
 932         return false;
 933 }
 934
 935 /*
 936  * Enable/disable port by adding to enabled port hashlist and setting
 937  * port->index (Might be racy so reader could see incorrect ifindex when
 938  * processing a flying packet, but that is not a problem). Write guarded
 939  * by team->lock.
 940  */
 941 static void team_port_enable(struct team *team,
 942                              struct team_port *port)
 943 {
 944         if (team_port_enabled(port))
 945                 return;
 946         port->index = team->en_port_count++;
 947         hlist_add_head_rcu(&port->hlist,
 948                            team_port_index_hash(team, port->index));
 949         team_adjust_ops(team);
 950         team_queue_override_port_add(team, port);
 951         if (team->ops.port_enabled)
 952                 team->ops.port_enabled(team, port);
 953         team_notify_peers(team);
 954         team_mcast_rejoin(team);
 955         team_lower_state_changed(port);
 956 }
 957
 958 static void __reconstruct_port_hlist(struct team *team, int rm_index)
 959 {
 960         int i;
 961         struct team_port *port;
 962
 963         for (i = rm_index + 1; i < team->en_port_count; i++) {
 964                 port = team_get_port_by_index(team, i);
 965                 hlist_del_rcu(&port->hlist);
 966                 port->index--;
 967                 hlist_add_head_rcu(&port->hlist,
 968                                    team_port_index_hash(team, port->index));
 969         }
 970 }
 971
 972 static void team_port_disable(struct team *team,
 973                               struct team_port *port)
 974 {
 975         if (!team_port_enabled(port))
 976                 return;
 977         if (team->ops.port_disabled)
 978                 team->ops.port_disabled(team, port);
 979         hlist_del_rcu(&port->hlist);
 980         __reconstruct_port_hlist(team, port->index);
 981         port->index = -1;
 982         team->en_port_count--;
 983         team_queue_override_port_del(team, port);
 984         team_adjust_ops(team);
 985         team_lower_state_changed(port);
 986 }
 987
 988 #define TEAM_VLAN_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
 989                             NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
 990                             NETIF_F_HIGHDMA | NETIF_F_LRO)
 991
 992 #define TEAM_ENC_FEATURES       (NETIF_F_HW_CSUM | NETIF_F_SG | \
 993                                  NETIF_F_RXCSUM | NETIF_F_ALL_TSO)
 994
 995 static void __team_compute_features(struct team *team)
 996 {
 997         struct team_port *port;
 998         netdev_features_t vlan_features = TEAM_VLAN_FEATURES &
 999                                           NETIF_F_ALL_FOR_ALL;
1000         netdev_features_t enc_features  = TEAM_ENC_FEATURES;
1001         unsigned short max_hard_header_len = ETH_HLEN;
1002         unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE |
1003                                         IFF_XMIT_DST_RELEASE_PERM;
1004
1005         rcu_read_lock();
1006         list_for_each_entry_rcu(port, &team->port_list, list) {
1007                 vlan_features = netdev_increment_features(vlan_features,
1008                                         port->dev->vlan_features,
1009                                         TEAM_VLAN_FEATURES);
1010                 enc_features =
1011                         netdev_increment_features(enc_features,
1012                                                   port->dev->hw_enc_features,
1013                                                   TEAM_ENC_FEATURES);
1014
1015
1016                 dst_release_flag &= port->dev->priv_flags;
1017                 if (port->dev->hard_header_len > max_hard_header_len)
1018                         max_hard_header_len = port->dev->hard_header_len;
1019         }
1020         rcu_read_unlock();
1021
1022         team->dev->vlan_features = vlan_features;
1023         team->dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL |
1024                                      NETIF_F_HW_VLAN_CTAG_TX |
1025                                      NETIF_F_HW_VLAN_STAG_TX;
1026         team->dev->hard_header_len = max_hard_header_len;
1027
1028         team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
1029         if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
1030                 team->dev->priv_flags |= IFF_XMIT_DST_RELEASE;
1031 }
1032
1033 static void team_compute_features(struct team *team)
1034 {
1035         __team_compute_features(team);
1036         netdev_change_features(team->dev);
1037 }
1038
1039 static int team_port_enter(struct team *team, struct team_port *port)
1040 {
1041         int err = 0;
1042
1043         dev_hold(team->dev);
1044         if (team->ops.port_enter) {
1045                 err = team->ops.port_enter(team, port);
1046                 if (err) {
1047                         netdev_err(team->dev, "Device %s failed to enter team mode\n",
1048                                    port->dev->name);
1049                         goto err_port_enter;
1050                 }
1051         }
1052
1053         return 0;
1054
1055 err_port_enter:
1056         dev_put(team->dev);
1057
1058         return err;
1059 }
1060
1061 static void team_port_leave(struct team *team, struct team_port *port)
1062 {
1063         if (team->ops.port_leave)
1064                 team->ops.port_leave(team, port);
1065         dev_put(team->dev);
1066 }
1067
1068 #ifdef CONFIG_NET_POLL_CONTROLLER
1069 static int __team_port_enable_netpoll(struct team_port *port)
1070 {
1071         struct netpoll *np;
1072         int err;
1073
1074         np = kzalloc(sizeof(*np), GFP_KERNEL);
1075         if (!np)
1076                 return -ENOMEM;
1077
1078         err = __netpoll_setup(np, port->dev);
1079         if (err) {
1080                 kfree(np);
1081                 return err;
1082         }
1083         port->np = np;
1084         return err;
1085 }
1086
1087 static int team_port_enable_netpoll(struct team_port *port)
1088 {
1089         if (!port->team->dev->npinfo)
1090                 return 0;
1091
1092         return __team_port_enable_netpoll(port);
1093 }
1094
1095 static void team_port_disable_netpoll(struct team_port *port)
1096 {
1097         struct netpoll *np = port->np;
1098
1099         if (!np)
1100                 return;
1101         port->np = NULL;
1102
1103         /* Wait for transmitting packets to finish before freeing. */
1104         synchronize_rcu_bh();
1105         __netpoll_cleanup(np);
1106         kfree(np);
1107 }
1108 #else
1109 static int team_port_enable_netpoll(struct team_port *port)
1110 {
1111         return 0;
1112 }
1113 static void team_port_disable_netpoll(struct team_port *port)
1114 {
1115 }
1116 #endif
1117
1118 static int team_upper_dev_link(struct team *team, struct team_port *port)
1119 {
1120         struct netdev_lag_upper_info lag_upper_info;
1121         int err;
1122
1123         lag_upper_info.tx_type = team->mode->lag_tx_type;
1124         err = netdev_master_upper_dev_link(port->dev, team->dev, NULL,
1125                                            &lag_upper_info);
1126         if (err)
1127                 return err;
1128         port->dev->priv_flags |= IFF_TEAM_PORT;
1129         return 0;
1130 }
1131
1132 static void team_upper_dev_unlink(struct team *team, struct team_port *port)
1133 {
1134         netdev_upper_dev_unlink(port->dev, team->dev);
1135         port->dev->priv_flags &= ~IFF_TEAM_PORT;
1136 }
1137
1138 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1139 static int team_dev_type_check_change(struct net_device *dev,
1140                                       struct net_device *port_dev);
1141
1142 static int team_port_add(struct team *team, struct net_device *port_dev)
1143 {
1144         struct net_device *dev = team->dev;
1145         struct team_port *port;
1146         char *portname = port_dev->name;
1147         int err;
1148
1149         if (port_dev->flags & IFF_LOOPBACK) {
1150                 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1151                            portname);
1152                 return -EINVAL;
1153         }
1154
1155         if (team_port_exists(port_dev)) {
1156                 netdev_err(dev, "Device %s is already a port "
1157                                 "of a team device\n", portname);
1158                 return -EBUSY;
1159         }
1160
1161         if (dev == port_dev) {
1162                 netdev_err(dev, "Cannot enslave team device to itself\n");
1163                 return -EINVAL;
1164         }
1165
1166         if (netdev_has_upper_dev(dev, port_dev)) {
1167                 netdev_err(dev, "Device %s is already an upper device of the team interface\n",
1168                            portname);
1169                 return -EBUSY;
1170         }
1171
1172         if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1173             vlan_uses_dev(dev)) {
1174                 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1175                            portname);
1176                 return -EPERM;
1177         }
1178
1179         err = team_dev_type_check_change(dev, port_dev);
1180         if (err)
1181                 return err;
1182
1183         if (port_dev->flags & IFF_UP) {
1184                 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1185                            portname);
1186                 return -EBUSY;
1187         }
1188
1189         port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1190                        GFP_KERNEL);
1191         if (!port)
1192                 return -ENOMEM;
1193
1194         port->dev = port_dev;
1195         port->team = team;
1196         INIT_LIST_HEAD(&port->qom_list);
1197
1198         port->orig.mtu = port_dev->mtu;
1199         err = dev_set_mtu(port_dev, dev->mtu);
1200         if (err) {
1201                 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1202                 goto err_set_mtu;
1203         }
1204
1205         memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1206
1207         err = team_port_enter(team, port);
1208         if (err) {
1209                 netdev_err(dev, "Device %s failed to enter team mode\n",
1210                            portname);
1211                 goto err_port_enter;
1212         }
1213
1214         err = dev_open(port_dev);
1215         if (err) {
1216                 netdev_dbg(dev, "Device %s opening failed\n",
1217                            portname);
1218                 goto err_dev_open;
1219         }
1220
1221         err = vlan_vids_add_by_dev(port_dev, dev);
1222         if (err) {
1223                 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1224                                 portname);
1225                 goto err_vids_add;
1226         }
1227
1228         err = team_port_enable_netpoll(port);
1229         if (err) {
1230                 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1231                            portname);
1232                 goto err_enable_netpoll;
1233         }
1234
1235         if (!(dev->features & NETIF_F_LRO))
1236                 dev_disable_lro(port_dev);
1237
1238         err = netdev_rx_handler_register(port_dev, team_handle_frame,
1239                                          port);
1240         if (err) {
1241                 netdev_err(dev, "Device %s failed to register rx_handler\n",
1242                            portname);
1243                 goto err_handler_register;
1244         }
1245
1246         err = team_upper_dev_link(team, port);
1247         if (err) {
1248                 netdev_err(dev, "Device %s failed to set upper link\n",
1249                            portname);
1250                 goto err_set_upper_link;
1251         }
1252
1253         err = __team_option_inst_add_port(team, port);
1254         if (err) {
1255                 netdev_err(dev, "Device %s failed to add per-port options\n",
1256                            portname);
1257                 goto err_option_port_add;
1258         }
1259
1260         /* set promiscuity level to new slave */
1261         if (dev->flags & IFF_PROMISC) {
1262                 err = dev_set_promiscuity(port_dev, 1);
1263                 if (err)
1264                         goto err_set_slave_promisc;
1265         }
1266
1267         /* set allmulti level to new slave */
1268         if (dev->flags & IFF_ALLMULTI) {
1269                 err = dev_set_allmulti(port_dev, 1);
1270                 if (err) {
1271                         if (dev->flags & IFF_PROMISC)
1272                                 dev_set_promiscuity(port_dev, -1);
1273                         goto err_set_slave_promisc;
1274                 }
1275         }
1276
1277         netif_addr_lock_bh(dev);
1278         dev_uc_sync_multiple(port_dev, dev);
1279         dev_mc_sync_multiple(port_dev, dev);
1280         netif_addr_unlock_bh(dev);
1281
1282         port->index = -1;
1283         list_add_tail_rcu(&port->list, &team->port_list);
1284         team_port_enable(team, port);
1285         __team_compute_features(team);
1286         __team_port_change_port_added(port, !!netif_carrier_ok(port_dev));
1287         __team_options_change_check(team);
1288
1289         netdev_info(dev, "Port device %s added\n", portname);
1290
1291         return 0;
1292
1293 err_set_slave_promisc:
1294         __team_option_inst_del_port(team, port);
1295
1296 err_option_port_add:
1297         team_upper_dev_unlink(team, port);
1298
1299 err_set_upper_link:
1300         netdev_rx_handler_unregister(port_dev);
1301
1302 err_handler_register:
1303         team_port_disable_netpoll(port);
1304
1305 err_enable_netpoll:
1306         vlan_vids_del_by_dev(port_dev, dev);
1307
1308 err_vids_add:
1309         dev_close(port_dev);
1310
1311 err_dev_open:
1312         team_port_leave(team, port);
1313         team_port_set_orig_dev_addr(port);
1314
1315 err_port_enter:
1316         dev_set_mtu(port_dev, port->orig.mtu);
1317
1318 err_set_mtu:
1319         kfree(port);
1320
1321         return err;
1322 }
1323
1324 static void __team_port_change_port_removed(struct team_port *port);
1325
1326 static int team_port_del(struct team *team, struct net_device *port_dev)
1327 {
1328         struct net_device *dev = team->dev;
1329         struct team_port *port;
1330         char *portname = port_dev->name;
1331
1332         port = team_port_get_rtnl(port_dev);
1333         if (!port || !team_port_find(team, port)) {
1334                 netdev_err(dev, "Device %s does not act as a port of this team\n",
1335                            portname);
1336                 return -ENOENT;
1337         }
1338
1339         team_port_disable(team, port);
1340         list_del_rcu(&port->list);
1341
1342         if (dev->flags & IFF_PROMISC)
1343                 dev_set_promiscuity(port_dev, -1);
1344         if (dev->flags & IFF_ALLMULTI)
1345                 dev_set_allmulti(port_dev, -1);
1346
1347         team_upper_dev_unlink(team, port);
1348         netdev_rx_handler_unregister(port_dev);
1349         team_port_disable_netpoll(port);
1350         vlan_vids_del_by_dev(port_dev, dev);
1351         dev_uc_unsync(port_dev, dev);
1352         dev_mc_unsync(port_dev, dev);
1353         dev_close(port_dev);
1354         team_port_leave(team, port);
1355
1356         __team_option_inst_mark_removed_port(team, port);
1357         __team_options_change_check(team);
1358         __team_option_inst_del_port(team, port);
1359         __team_port_change_port_removed(port);
1360
1361         team_port_set_orig_dev_addr(port);
1362         dev_set_mtu(port_dev, port->orig.mtu);
1363         kfree_rcu(port, rcu);
1364         netdev_info(dev, "Port device %s removed\n", portname);
1365         __team_compute_features(team);
1366
1367         return 0;
1368 }
1369
1370
1371 /*****************
1372  * Net device ops
1373  *****************/
1374
1375 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1376 {
1377         ctx->data.str_val = team->mode->kind;
1378         return 0;
1379 }
1380
1381 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1382 {
1383         return team_change_mode(team, ctx->data.str_val);
1384 }
1385
1386 static int team_notify_peers_count_get(struct team *team,
1387                                        struct team_gsetter_ctx *ctx)
1388 {
1389         ctx->data.u32_val = team->notify_peers.count;
1390         return 0;
1391 }
1392
1393 static int team_notify_peers_count_set(struct team *team,
1394                                        struct team_gsetter_ctx *ctx)
1395 {
1396         team->notify_peers.count = ctx->data.u32_val;
1397         return 0;
1398 }
1399
1400 static int team_notify_peers_interval_get(struct team *team,
1401                                           struct team_gsetter_ctx *ctx)
1402 {
1403         ctx->data.u32_val = team->notify_peers.interval;
1404         return 0;
1405 }
1406
1407 static int team_notify_peers_interval_set(struct team *team,
1408                                           struct team_gsetter_ctx *ctx)
1409 {
1410         team->notify_peers.interval = ctx->data.u32_val;
1411         return 0;
1412 }
1413
1414 static int team_mcast_rejoin_count_get(struct team *team,
1415                                        struct team_gsetter_ctx *ctx)
1416 {
1417         ctx->data.u32_val = team->mcast_rejoin.count;
1418         return 0;
1419 }
1420
1421 static int team_mcast_rejoin_count_set(struct team *team,
1422                                        struct team_gsetter_ctx *ctx)
1423 {
1424         team->mcast_rejoin.count = ctx->data.u32_val;
1425         return 0;
1426 }
1427
1428 static int team_mcast_rejoin_interval_get(struct team *team,
1429                                           struct team_gsetter_ctx *ctx)
1430 {
1431         ctx->data.u32_val = team->mcast_rejoin.interval;
1432         return 0;
1433 }
1434
1435 static int team_mcast_rejoin_interval_set(struct team *team,
1436                                           struct team_gsetter_ctx *ctx)
1437 {
1438         team->mcast_rejoin.interval = ctx->data.u32_val;
1439         return 0;
1440 }
1441
1442 static int team_port_en_option_get(struct team *team,
1443                                    struct team_gsetter_ctx *ctx)
1444 {
1445         struct team_port *port = ctx->info->port;
1446
1447         ctx->data.bool_val = team_port_enabled(port);
1448         return 0;
1449 }
1450
1451 static int team_port_en_option_set(struct team *team,
1452                                    struct team_gsetter_ctx *ctx)
1453 {
1454         struct team_port *port = ctx->info->port;
1455
1456         if (ctx->data.bool_val)
1457                 team_port_enable(team, port);
1458         else
1459                 team_port_disable(team, port);
1460         return 0;
1461 }
1462
1463 static int team_user_linkup_option_get(struct team *team,
1464                                        struct team_gsetter_ctx *ctx)
1465 {
1466         struct team_port *port = ctx->info->port;
1467
1468         ctx->data.bool_val = port->user.linkup;
1469         return 0;
1470 }
1471
1472 static void __team_carrier_check(struct team *team);
1473
1474 static int team_user_linkup_option_set(struct team *team,
1475                                        struct team_gsetter_ctx *ctx)
1476 {
1477         struct team_port *port = ctx->info->port;
1478
1479         port->user.linkup = ctx->data.bool_val;
1480         team_refresh_port_linkup(port);
1481         __team_carrier_check(port->team);
1482         return 0;
1483 }
1484
1485 static int team_user_linkup_en_option_get(struct team *team,
1486                                           struct team_gsetter_ctx *ctx)
1487 {
1488         struct team_port *port = ctx->info->port;
1489
1490         ctx->data.bool_val = port->user.linkup_enabled;
1491         return 0;
1492 }
1493
1494 static int team_user_linkup_en_option_set(struct team *team,
1495                                           struct team_gsetter_ctx *ctx)
1496 {
1497         struct team_port *port = ctx->info->port;
1498
1499         port->user.linkup_enabled = ctx->data.bool_val;
1500         team_refresh_port_linkup(port);
1501         __team_carrier_check(port->team);
1502         return 0;
1503 }
1504
1505 static int team_priority_option_get(struct team *team,
1506                                     struct team_gsetter_ctx *ctx)
1507 {
1508         struct team_port *port = ctx->info->port;
1509
1510         ctx->data.s32_val = port->priority;
1511         return 0;
1512 }
1513
1514 static int team_priority_option_set(struct team *team,
1515                                     struct team_gsetter_ctx *ctx)
1516 {
1517         struct team_port *port = ctx->info->port;
1518         s32 priority = ctx->data.s32_val;
1519
1520         if (port->priority == priority)
1521                 return 0;
1522         port->priority = priority;
1523         team_queue_override_port_prio_changed(team, port);
1524         return 0;
1525 }
1526
1527 static int team_queue_id_option_get(struct team *team,
1528                                     struct team_gsetter_ctx *ctx)
1529 {
1530         struct team_port *port = ctx->info->port;
1531
1532         ctx->data.u32_val = port->queue_id;
1533         return 0;
1534 }
1535
1536 static int team_queue_id_option_set(struct team *team,
1537                                     struct team_gsetter_ctx *ctx)
1538 {
1539         struct team_port *port = ctx->info->port;
1540         u16 new_queue_id = ctx->data.u32_val;
1541
1542         if (port->queue_id == new_queue_id)
1543                 return 0;
1544         if (new_queue_id >= team->dev->real_num_tx_queues)
1545                 return -EINVAL;
1546         team_queue_override_port_change_queue_id(team, port, new_queue_id);
1547         return 0;
1548 }
1549
1550 static const struct team_option team_options[] = {
1551         {
1552                 .name = "mode",
1553                 .type = TEAM_OPTION_TYPE_STRING,
1554                 .getter = team_mode_option_get,
1555                 .setter = team_mode_option_set,
1556         },
1557         {
1558                 .name = "notify_peers_count",
1559                 .type = TEAM_OPTION_TYPE_U32,
1560                 .getter = team_notify_peers_count_get,
1561                 .setter = team_notify_peers_count_set,
1562         },
1563         {
1564                 .name = "notify_peers_interval",
1565                 .type = TEAM_OPTION_TYPE_U32,
1566                 .getter = team_notify_peers_interval_get,
1567                 .setter = team_notify_peers_interval_set,
1568         },
1569         {
1570                 .name = "mcast_rejoin_count",
1571                 .type = TEAM_OPTION_TYPE_U32,
1572                 .getter = team_mcast_rejoin_count_get,
1573                 .setter = team_mcast_rejoin_count_set,
1574         },
1575         {
1576                 .name = "mcast_rejoin_interval",
1577                 .type = TEAM_OPTION_TYPE_U32,
1578                 .getter = team_mcast_rejoin_interval_get,
1579                 .setter = team_mcast_rejoin_interval_set,
1580         },
1581         {
1582                 .name = "enabled",
1583                 .type = TEAM_OPTION_TYPE_BOOL,
1584                 .per_port = true,
1585                 .getter = team_port_en_option_get,
1586                 .setter = team_port_en_option_set,
1587         },
1588         {
1589                 .name = "user_linkup",
1590                 .type = TEAM_OPTION_TYPE_BOOL,
1591                 .per_port = true,
1592                 .getter = team_user_linkup_option_get,
1593                 .setter = team_user_linkup_option_set,
1594         },
1595         {
1596                 .name = "user_linkup_enabled",
1597                 .type = TEAM_OPTION_TYPE_BOOL,
1598                 .per_port = true,
1599                 .getter = team_user_linkup_en_option_get,
1600                 .setter = team_user_linkup_en_option_set,
1601         },
1602         {
1603                 .name = "priority",
1604                 .type = TEAM_OPTION_TYPE_S32,
1605                 .per_port = true,
1606                 .getter = team_priority_option_get,
1607                 .setter = team_priority_option_set,
1608         },
1609         {
1610                 .name = "queue_id",
1611                 .type = TEAM_OPTION_TYPE_U32,
1612                 .per_port = true,
1613                 .getter = team_queue_id_option_get,
1614                 .setter = team_queue_id_option_set,
1615         },
1616 };
1617
1618
1619 static int team_init(struct net_device *dev)
1620 {
1621         struct team *team = netdev_priv(dev);
1622         int i;
1623         int err;
1624
1625         team->dev = dev;
1626         mutex_init(&team->lock);
1627         team_set_no_mode(team);
1628
1629         team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1630         if (!team->pcpu_stats)
1631                 return -ENOMEM;
1632
1633         for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1634                 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1635         INIT_LIST_HEAD(&team->port_list);
1636         err = team_queue_override_init(team);
1637         if (err)
1638                 goto err_team_queue_override_init;
1639
1640         team_adjust_ops(team);
1641
1642         INIT_LIST_HEAD(&team->option_list);
1643         INIT_LIST_HEAD(&team->option_inst_list);
1644
1645         team_notify_peers_init(team);
1646         team_mcast_rejoin_init(team);
1647
1648         err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1649         if (err)
1650                 goto err_options_register;
1651         netif_carrier_off(dev);
1652
1653         netdev_lockdep_set_classes(dev);
1654
1655         return 0;
1656
1657 err_options_register:
1658         team_mcast_rejoin_fini(team);
1659         team_notify_peers_fini(team);
1660         team_queue_override_fini(team);
1661 err_team_queue_override_init:
1662         free_percpu(team->pcpu_stats);
1663
1664         return err;
1665 }
1666
1667 static void team_uninit(struct net_device *dev)
1668 {
1669         struct team *team = netdev_priv(dev);
1670         struct team_port *port;
1671         struct team_port *tmp;
1672
1673         mutex_lock(&team->lock);
1674         list_for_each_entry_safe(port, tmp, &team->port_list, list)
1675                 team_port_del(team, port->dev);
1676
1677         __team_change_mode(team, NULL); /* cleanup */
1678         __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1679         team_mcast_rejoin_fini(team);
1680         team_notify_peers_fini(team);
1681         team_queue_override_fini(team);
1682         mutex_unlock(&team->lock);
1683         netdev_change_features(dev);
1684 }
1685
1686 static void team_destructor(struct net_device *dev)
1687 {
1688         struct team *team = netdev_priv(dev);
1689
1690         free_percpu(team->pcpu_stats);
1691 }
1692
1693 static int team_open(struct net_device *dev)
1694 {
1695         return 0;
1696 }
1697
1698 static int team_close(struct net_device *dev)
1699 {
1700         return 0;
1701 }
1702
1703 /*
1704  * note: already called with rcu_read_lock
1705  */
1706 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1707 {
1708         struct team *team = netdev_priv(dev);
1709         bool tx_success;
1710         unsigned int len = skb->len;
1711
1712         tx_success = team_queue_override_transmit(team, skb);
1713         if (!tx_success)
1714                 tx_success = team->ops.transmit(team, skb);
1715         if (tx_success) {
1716                 struct team_pcpu_stats *pcpu_stats;
1717
1718                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1719                 u64_stats_update_begin(&pcpu_stats->syncp);
1720                 pcpu_stats->tx_packets++;
1721                 pcpu_stats->tx_bytes += len;
1722                 u64_stats_update_end(&pcpu_stats->syncp);
1723         } else {
1724                 this_cpu_inc(team->pcpu_stats->tx_dropped);
1725         }
1726
1727         return NETDEV_TX_OK;
1728 }
1729
1730 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1731                              void *accel_priv, select_queue_fallback_t fallback)
1732 {
1733         /*
1734          * This helper function exists to help dev_pick_tx get the correct
1735          * destination queue.  Using a helper function skips a call to
1736          * skb_tx_hash and will put the skbs in the queue we expect on their
1737          * way down to the team driver.
1738          */
1739         u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1740
1741         /*
1742          * Save the original txq to restore before passing to the driver
1743          */
1744         qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1745
1746         if (unlikely(txq >= dev->real_num_tx_queues)) {
1747                 do {
1748                         txq -= dev->real_num_tx_queues;
1749                 } while (txq >= dev->real_num_tx_queues);
1750         }
1751         return txq;
1752 }
1753
1754 static void team_change_rx_flags(struct net_device *dev, int change)
1755 {
1756         struct team *team = netdev_priv(dev);
1757         struct team_port *port;
1758         int inc;
1759
1760         rcu_read_lock();
1761         list_for_each_entry_rcu(port, &team->port_list, list) {
1762                 if (change & IFF_PROMISC) {
1763                         inc = dev->flags & IFF_PROMISC ? 1 : -1;
1764                         dev_set_promiscuity(port->dev, inc);
1765                 }
1766                 if (change & IFF_ALLMULTI) {
1767                         inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1768                         dev_set_allmulti(port->dev, inc);
1769                 }
1770         }
1771         rcu_read_unlock();
1772 }
1773
1774 static void team_set_rx_mode(struct net_device *dev)
1775 {
1776         struct team *team = netdev_priv(dev);
1777         struct team_port *port;
1778
1779         rcu_read_lock();
1780         list_for_each_entry_rcu(port, &team->port_list, list) {
1781                 dev_uc_sync_multiple(port->dev, dev);
1782                 dev_mc_sync_multiple(port->dev, dev);
1783         }
1784         rcu_read_unlock();
1785 }
1786
1787 static int team_set_mac_address(struct net_device *dev, void *p)
1788 {
1789         struct sockaddr *addr = p;
1790         struct team *team = netdev_priv(dev);
1791         struct team_port *port;
1792
1793         if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1794                 return -EADDRNOTAVAIL;
1795         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1796         mutex_lock(&team->lock);
1797         list_for_each_entry(port, &team->port_list, list)
1798                 if (team->ops.port_change_dev_addr)
1799                         team->ops.port_change_dev_addr(team, port);
1800         mutex_unlock(&team->lock);
1801         return 0;
1802 }
1803
1804 static int team_change_mtu(struct net_device *dev, int new_mtu)
1805 {
1806         struct team *team = netdev_priv(dev);
1807         struct team_port *port;
1808         int err;
1809
1810         /*
1811          * Alhough this is reader, it's guarded by team lock. It's not possible
1812          * to traverse list in reverse under rcu_read_lock
1813          */
1814         mutex_lock(&team->lock);
1815         team->port_mtu_change_allowed = true;
1816         list_for_each_entry(port, &team->port_list, list) {
1817                 err = dev_set_mtu(port->dev, new_mtu);
1818                 if (err) {
1819                         netdev_err(dev, "Device %s failed to change mtu",
1820                                    port->dev->name);
1821                         goto unwind;
1822                 }
1823         }
1824         team->port_mtu_change_allowed = false;
1825         mutex_unlock(&team->lock);
1826
1827         dev->mtu = new_mtu;
1828
1829         return 0;
1830
1831 unwind:
1832         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1833                 dev_set_mtu(port->dev, dev->mtu);
1834         team->port_mtu_change_allowed = false;
1835         mutex_unlock(&team->lock);
1836
1837         return err;
1838 }
1839
1840 static void
1841 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1842 {
1843         struct team *team = netdev_priv(dev);
1844         struct team_pcpu_stats *p;
1845         u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1846         u32 rx_dropped = 0, tx_dropped = 0, rx_nohandler = 0;
1847         unsigned int start;
1848         int i;
1849
1850         for_each_possible_cpu(i) {
1851                 p = per_cpu_ptr(team->pcpu_stats, i);
1852                 do {
1853                         start = u64_stats_fetch_begin_irq(&p->syncp);
1854                         rx_packets      = p->rx_packets;
1855                         rx_bytes        = p->rx_bytes;
1856                         rx_multicast    = p->rx_multicast;
1857                         tx_packets      = p->tx_packets;
1858                         tx_bytes        = p->tx_bytes;
1859                 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
1860
1861                 stats->rx_packets       += rx_packets;
1862                 stats->rx_bytes         += rx_bytes;
1863                 stats->multicast        += rx_multicast;
1864                 stats->tx_packets       += tx_packets;
1865                 stats->tx_bytes         += tx_bytes;
1866                 /*
1867                  * rx_dropped, tx_dropped & rx_nohandler are u32,
1868                  * updated without syncp protection.
1869                  */
1870                 rx_dropped      += p->rx_dropped;
1871                 tx_dropped      += p->tx_dropped;
1872                 rx_nohandler    += p->rx_nohandler;
1873         }
1874         stats->rx_dropped       = rx_dropped;
1875         stats->tx_dropped       = tx_dropped;
1876         stats->rx_nohandler     = rx_nohandler;
1877 }
1878
1879 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1880 {
1881         struct team *team = netdev_priv(dev);
1882         struct team_port *port;
1883         int err;
1884
1885         /*
1886          * Alhough this is reader, it's guarded by team lock. It's not possible
1887          * to traverse list in reverse under rcu_read_lock
1888          */
1889         mutex_lock(&team->lock);
1890         list_for_each_entry(port, &team->port_list, list) {
1891                 err = vlan_vid_add(port->dev, proto, vid);
1892                 if (err)
1893                         goto unwind;
1894         }
1895         mutex_unlock(&team->lock);
1896
1897         return 0;
1898
1899 unwind:
1900         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1901                 vlan_vid_del(port->dev, proto, vid);
1902         mutex_unlock(&team->lock);
1903
1904         return err;
1905 }
1906
1907 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1908 {
1909         struct team *team = netdev_priv(dev);
1910         struct team_port *port;
1911
1912         mutex_lock(&team->lock);
1913         list_for_each_entry(port, &team->port_list, list)
1914                 vlan_vid_del(port->dev, proto, vid);
1915         mutex_unlock(&team->lock);
1916
1917         return 0;
1918 }
1919
1920 #ifdef CONFIG_NET_POLL_CONTROLLER
1921 static void team_poll_controller(struct net_device *dev)
1922 {
1923 }
1924
1925 static void __team_netpoll_cleanup(struct team *team)
1926 {
1927         struct team_port *port;
1928
1929         list_for_each_entry(port, &team->port_list, list)
1930                 team_port_disable_netpoll(port);
1931 }
1932
1933 static void team_netpoll_cleanup(struct net_device *dev)
1934 {
1935         struct team *team = netdev_priv(dev);
1936
1937         mutex_lock(&team->lock);
1938         __team_netpoll_cleanup(team);
1939         mutex_unlock(&team->lock);
1940 }
1941
1942 static int team_netpoll_setup(struct net_device *dev,
1943                               struct netpoll_info *npifo)
1944 {
1945         struct team *team = netdev_priv(dev);
1946         struct team_port *port;
1947         int err = 0;
1948
1949         mutex_lock(&team->lock);
1950         list_for_each_entry(port, &team->port_list, list) {
1951                 err = __team_port_enable_netpoll(port);
1952                 if (err) {
1953                         __team_netpoll_cleanup(team);
1954                         break;
1955                 }
1956         }
1957         mutex_unlock(&team->lock);
1958         return err;
1959 }
1960 #endif
1961
1962 static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
1963 {
1964         struct team *team = netdev_priv(dev);
1965         int err;
1966
1967         mutex_lock(&team->lock);
1968         err = team_port_add(team, port_dev);
1969         mutex_unlock(&team->lock);
1970
1971         if (!err)
1972                 netdev_change_features(dev);
1973
1974         return err;
1975 }
1976
1977 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1978 {
1979         struct team *team = netdev_priv(dev);
1980         int err;
1981
1982         mutex_lock(&team->lock);
1983         err = team_port_del(team, port_dev);
1984         mutex_unlock(&team->lock);
1985
1986         if (!err)
1987                 netdev_change_features(dev);
1988
1989         return err;
1990 }
1991
1992 static netdev_features_t team_fix_features(struct net_device *dev,
1993                                            netdev_features_t features)
1994 {
1995         struct team_port *port;
1996         struct team *team = netdev_priv(dev);
1997         netdev_features_t mask;
1998
1999         mask = features;
2000         features &= ~NETIF_F_ONE_FOR_ALL;
2001         features |= NETIF_F_ALL_FOR_ALL;
2002
2003         rcu_read_lock();
2004         list_for_each_entry_rcu(port, &team->port_list, list) {
2005                 features = netdev_increment_features(features,
2006                                                      port->dev->features,
2007                                                      mask);
2008         }
2009         rcu_read_unlock();
2010
2011         features = netdev_add_tso_features(features, mask);
2012
2013         return features;
2014 }
2015
2016 static int team_change_carrier(struct net_device *dev, bool new_carrier)
2017 {
2018         struct team *team = netdev_priv(dev);
2019
2020         team->user_carrier_enabled = true;
2021
2022         if (new_carrier)
2023                 netif_carrier_on(dev);
2024         else
2025                 netif_carrier_off(dev);
2026         return 0;
2027 }
2028
2029 static const struct net_device_ops team_netdev_ops = {
2030         .ndo_init               = team_init,
2031         .ndo_uninit             = team_uninit,
2032         .ndo_open               = team_open,
2033         .ndo_stop               = team_close,
2034         .ndo_start_xmit         = team_xmit,
2035         .ndo_select_queue       = team_select_queue,
2036         .ndo_change_rx_flags    = team_change_rx_flags,
2037         .ndo_set_rx_mode        = team_set_rx_mode,
2038         .ndo_set_mac_address    = team_set_mac_address,
2039         .ndo_change_mtu         = team_change_mtu,
2040         .ndo_get_stats64        = team_get_stats64,
2041         .ndo_vlan_rx_add_vid    = team_vlan_rx_add_vid,
2042         .ndo_vlan_rx_kill_vid   = team_vlan_rx_kill_vid,
2043 #ifdef CONFIG_NET_POLL_CONTROLLER
2044         .ndo_poll_controller    = team_poll_controller,
2045         .ndo_netpoll_setup      = team_netpoll_setup,
2046         .ndo_netpoll_cleanup    = team_netpoll_cleanup,
2047 #endif
2048         .ndo_add_slave          = team_add_slave,
2049         .ndo_del_slave          = team_del_slave,
2050         .ndo_fix_features       = team_fix_features,
2051         .ndo_change_carrier     = team_change_carrier,
2052         .ndo_features_check     = passthru_features_check,
2053 };
2054
2055 /***********************
2056  * ethtool interface
2057  ***********************/
2058
2059 static void team_ethtool_get_drvinfo(struct net_device *dev,
2060                                      struct ethtool_drvinfo *drvinfo)
2061 {
2062         strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
2063         strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2064 }
2065
2066 static const struct ethtool_ops team_ethtool_ops = {
2067         .get_drvinfo            = team_ethtool_get_drvinfo,
2068         .get_link               = ethtool_op_get_link,
2069 };
2070
2071 /***********************
2072  * rt netlink interface
2073  ***********************/
2074
2075 static void team_setup_by_port(struct net_device *dev,
2076                                struct net_device *port_dev)
2077 {
2078         dev->header_ops = port_dev->header_ops;
2079         dev->type = port_dev->type;
2080         dev->hard_header_len = port_dev->hard_header_len;
2081         dev->needed_headroom = port_dev->needed_headroom;
2082         dev->addr_len = port_dev->addr_len;
2083         dev->mtu = port_dev->mtu;
2084         memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2085         eth_hw_addr_inherit(dev, port_dev);
2086 }
2087
2088 static int team_dev_type_check_change(struct net_device *dev,
2089                                       struct net_device *port_dev)
2090 {
2091         struct team *team = netdev_priv(dev);
2092         char *portname = port_dev->name;
2093         int err;
2094
2095         if (dev->type == port_dev->type)
2096                 return 0;
2097         if (!list_empty(&team->port_list)) {
2098                 netdev_err(dev, "Device %s is of different type\n", portname);
2099                 return -EBUSY;
2100         }
2101         err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2102         err = notifier_to_errno(err);
2103         if (err) {
2104                 netdev_err(dev, "Refused to change device type\n");
2105                 return err;
2106         }
2107         dev_uc_flush(dev);
2108         dev_mc_flush(dev);
2109         team_setup_by_port(dev, port_dev);
2110         call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2111         return 0;
2112 }
2113
2114 static void team_setup(struct net_device *dev)
2115 {
2116         ether_setup(dev);
2117         dev->max_mtu = ETH_MAX_MTU;
2118
2119         dev->netdev_ops = &team_netdev_ops;
2120         dev->ethtool_ops = &team_ethtool_ops;
2121         dev->needs_free_netdev = true;
2122         dev->priv_destructor = team_destructor;
2123         dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2124         dev->priv_flags |= IFF_NO_QUEUE;
2125         dev->priv_flags |= IFF_TEAM;
2126
2127         /*
2128          * Indicate we support unicast address filtering. That way core won't
2129          * bring us to promisc mode in case a unicast addr is added.
2130          * Let this up to underlay drivers.
2131          */
2132         dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2133
2134         dev->features |= NETIF_F_LLTX;
2135         dev->features |= NETIF_F_GRO;
2136
2137         /* Don't allow team devices to change network namespaces. */
2138         dev->features |= NETIF_F_NETNS_LOCAL;
2139
2140         dev->hw_features = TEAM_VLAN_FEATURES |
2141                            NETIF_F_HW_VLAN_CTAG_RX |
2142                            NETIF_F_HW_VLAN_CTAG_FILTER;
2143
2144         dev->hw_features |= NETIF_F_GSO_ENCAP_ALL;
2145         dev->features |= dev->hw_features;
2146         dev->features |= NETIF_F_HW_VLAN_CTAG_TX;
2147 }
2148
2149 static int team_newlink(struct net *src_net, struct net_device *dev,
2150                         struct nlattr *tb[], struct nlattr *data[],
2151                         struct netlink_ext_ack *extack)
2152 {
2153         if (tb[IFLA_ADDRESS] == NULL)
2154                 eth_hw_addr_random(dev);
2155
2156         return register_netdevice(dev);
2157 }
2158
2159 static int team_validate(struct nlattr *tb[], struct nlattr *data[],
2160                          struct netlink_ext_ack *extack)
2161 {
2162         if (tb[IFLA_ADDRESS]) {
2163                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2164                         return -EINVAL;
2165                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2166                         return -EADDRNOTAVAIL;
2167         }
2168         return 0;
2169 }
2170
2171 static unsigned int team_get_num_tx_queues(void)
2172 {
2173         return TEAM_DEFAULT_NUM_TX_QUEUES;
2174 }
2175
2176 static unsigned int team_get_num_rx_queues(void)
2177 {
2178         return TEAM_DEFAULT_NUM_RX_QUEUES;
2179 }
2180
2181 static struct rtnl_link_ops team_link_ops __read_mostly = {
2182         .kind                   = DRV_NAME,
2183         .priv_size              = sizeof(struct team),
2184         .setup                  = team_setup,
2185         .newlink                = team_newlink,
2186         .validate               = team_validate,
2187         .get_num_tx_queues      = team_get_num_tx_queues,
2188         .get_num_rx_queues      = team_get_num_rx_queues,
2189 };
2190
2191
2192 /***********************************
2193  * Generic netlink custom interface
2194  ***********************************/
2195
2196 static struct genl_family team_nl_family;
2197
2198 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2199         [TEAM_ATTR_UNSPEC]                      = { .type = NLA_UNSPEC, },
2200         [TEAM_ATTR_TEAM_IFINDEX]                = { .type = NLA_U32 },
2201         [TEAM_ATTR_LIST_OPTION]                 = { .type = NLA_NESTED },
2202         [TEAM_ATTR_LIST_PORT]                   = { .type = NLA_NESTED },
2203 };
2204
2205 static const struct nla_policy
2206 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2207         [TEAM_ATTR_OPTION_UNSPEC]               = { .type = NLA_UNSPEC, },
2208         [TEAM_ATTR_OPTION_NAME] = {
2209                 .type = NLA_STRING,
2210                 .len = TEAM_STRING_MAX_LEN,
2211         },
2212         [TEAM_ATTR_OPTION_CHANGED]              = { .type = NLA_FLAG },
2213         [TEAM_ATTR_OPTION_TYPE]                 = { .type = NLA_U8 },
2214         [TEAM_ATTR_OPTION_DATA]                 = { .type = NLA_BINARY },
2215         [TEAM_ATTR_OPTION_PORT_IFINDEX]         = { .type = NLA_U32 },
2216         [TEAM_ATTR_OPTION_ARRAY_INDEX]          = { .type = NLA_U32 },
2217 };
2218
2219 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2220 {
2221         struct sk_buff *msg;
2222         void *hdr;
2223         int err;
2224
2225         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2226         if (!msg)
2227                 return -ENOMEM;
2228
2229         hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2230                           &team_nl_family, 0, TEAM_CMD_NOOP);
2231         if (!hdr) {
2232                 err = -EMSGSIZE;
2233                 goto err_msg_put;
2234         }
2235
2236         genlmsg_end(msg, hdr);
2237
2238         return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2239
2240 err_msg_put:
2241         nlmsg_free(msg);
2242
2243         return err;
2244 }
2245
2246 /*
2247  * Netlink cmd functions should be locked by following two functions.
2248  * Since dev gets held here, that ensures dev won't disappear in between.
2249  */
2250 static struct team *team_nl_team_get(struct genl_info *info)
2251 {
2252         struct net *net = genl_info_net(info);
2253         int ifindex;
2254         struct net_device *dev;
2255         struct team *team;
2256
2257         if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2258                 return NULL;
2259
2260         ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2261         dev = dev_get_by_index(net, ifindex);
2262         if (!dev || dev->netdev_ops != &team_netdev_ops) {
2263                 if (dev)
2264                         dev_put(dev);
2265                 return NULL;
2266         }
2267
2268         team = netdev_priv(dev);
2269         mutex_lock(&team->lock);
2270         return team;
2271 }
2272
2273 static void team_nl_team_put(struct team *team)
2274 {
2275         mutex_unlock(&team->lock);
2276         dev_put(team->dev);
2277 }
2278
2279 typedef int team_nl_send_func_t(struct sk_buff *skb,
2280                                 struct team *team, u32 portid);
2281
2282 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2283 {
2284         return genlmsg_unicast(dev_net(team->dev), skb, portid);
2285 }
2286
2287 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2288                                        struct team_option_inst *opt_inst)
2289 {
2290         struct nlattr *option_item;
2291         struct team_option *option = opt_inst->option;
2292         struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2293         struct team_gsetter_ctx ctx;
2294         int err;
2295
2296         ctx.info = opt_inst_info;
2297         err = team_option_get(team, opt_inst, &ctx);
2298         if (err)
2299                 return err;
2300
2301         option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
2302         if (!option_item)
2303                 return -EMSGSIZE;
2304
2305         if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2306                 goto nest_cancel;
2307         if (opt_inst_info->port &&
2308             nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2309                         opt_inst_info->port->dev->ifindex))
2310                 goto nest_cancel;
2311         if (opt_inst->option->array_size &&
2312             nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2313                         opt_inst_info->array_index))
2314                 goto nest_cancel;
2315
2316         switch (option->type) {
2317         case TEAM_OPTION_TYPE_U32:
2318                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2319                         goto nest_cancel;
2320                 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2321                         goto nest_cancel;
2322                 break;
2323         case TEAM_OPTION_TYPE_STRING:
2324                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2325                         goto nest_cancel;
2326                 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2327                                    ctx.data.str_val))
2328                         goto nest_cancel;
2329                 break;
2330         case TEAM_OPTION_TYPE_BINARY:
2331                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2332                         goto nest_cancel;
2333                 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2334                             ctx.data.bin_val.ptr))
2335                         goto nest_cancel;
2336                 break;
2337         case TEAM_OPTION_TYPE_BOOL:
2338                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2339                         goto nest_cancel;
2340                 if (ctx.data.bool_val &&
2341                     nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2342                         goto nest_cancel;
2343                 break;
2344         case TEAM_OPTION_TYPE_S32:
2345                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2346                         goto nest_cancel;
2347                 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2348                         goto nest_cancel;
2349                 break;
2350         default:
2351                 BUG();
2352         }
2353         if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2354                 goto nest_cancel;
2355         if (opt_inst->changed) {
2356                 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2357                         goto nest_cancel;
2358                 opt_inst->changed = false;
2359         }
2360         nla_nest_end(skb, option_item);
2361         return 0;
2362
2363 nest_cancel:
2364         nla_nest_cancel(skb, option_item);
2365         return -EMSGSIZE;
2366 }
2367
2368 static int __send_and_alloc_skb(struct sk_buff **pskb,
2369                                 struct team *team, u32 portid,
2370                                 team_nl_send_func_t *send_func)
2371 {
2372         int err;
2373
2374         if (*pskb) {
2375                 err = send_func(*pskb, team, portid);
2376                 if (err)
2377                         return err;
2378         }
2379         *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2380         if (!*pskb)
2381                 return -ENOMEM;
2382         return 0;
2383 }
2384
2385 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2386                                     int flags, team_nl_send_func_t *send_func,
2387                                     struct list_head *sel_opt_inst_list)
2388 {
2389         struct nlattr *option_list;
2390         struct nlmsghdr *nlh;
2391         void *hdr;
2392         struct team_option_inst *opt_inst;
2393         int err;
2394         struct sk_buff *skb = NULL;
2395         bool incomplete;
2396         int i;
2397
2398         opt_inst = list_first_entry(sel_opt_inst_list,
2399                                     struct team_option_inst, tmp_list);
2400
2401 start_again:
2402         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2403         if (err)
2404                 return err;
2405
2406         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2407                           TEAM_CMD_OPTIONS_GET);
2408         if (!hdr) {
2409                 nlmsg_free(skb);
2410                 return -EMSGSIZE;
2411         }
2412
2413         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2414                 goto nla_put_failure;
2415         option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2416         if (!option_list)
2417                 goto nla_put_failure;
2418
2419         i = 0;
2420         incomplete = false;
2421         list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2422                 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2423                 if (err) {
2424                         if (err == -EMSGSIZE) {
2425                                 if (!i)
2426                                         goto errout;
2427                                 incomplete = true;
2428                                 break;
2429                         }
2430                         goto errout;
2431                 }
2432                 i++;
2433         }
2434
2435         nla_nest_end(skb, option_list);
2436         genlmsg_end(skb, hdr);
2437         if (incomplete)
2438                 goto start_again;
2439
2440 send_done:
2441         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2442         if (!nlh) {
2443                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2444                 if (err)
2445                         return err;
2446                 goto send_done;
2447         }
2448
2449         return send_func(skb, team, portid);
2450
2451 nla_put_failure:
2452         err = -EMSGSIZE;
2453 errout:
2454         genlmsg_cancel(skb, hdr);
2455         nlmsg_free(skb);
2456         return err;
2457 }
2458
2459 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2460 {
2461         struct team *team;
2462         struct team_option_inst *opt_inst;
2463         int err;
2464         LIST_HEAD(sel_opt_inst_list);
2465
2466         team = team_nl_team_get(info);
2467         if (!team)
2468                 return -EINVAL;
2469
2470         list_for_each_entry(opt_inst, &team->option_inst_list, list)
2471                 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2472         err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2473                                        NLM_F_ACK, team_nl_send_unicast,
2474                                        &sel_opt_inst_list);
2475
2476         team_nl_team_put(team);
2477
2478         return err;
2479 }
2480
2481 static int team_nl_send_event_options_get(struct team *team,
2482                                           struct list_head *sel_opt_inst_list);
2483
2484 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2485 {
2486         struct team *team;
2487         int err = 0;
2488         int i;
2489         struct nlattr *nl_option;
2490
2491         rtnl_lock();
2492
2493         team = team_nl_team_get(info);
2494         if (!team) {
2495                 err = -EINVAL;
2496                 goto rtnl_unlock;
2497         }
2498
2499         err = -EINVAL;
2500         if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2501                 err = -EINVAL;
2502                 goto team_put;
2503         }
2504
2505         nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2506                 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2507                 struct nlattr *attr;
2508                 struct nlattr *attr_data;
2509                 LIST_HEAD(opt_inst_list);
2510                 enum team_option_type opt_type;
2511                 int opt_port_ifindex = 0; /* != 0 for per-port options */
2512                 u32 opt_array_index = 0;
2513                 bool opt_is_array = false;
2514                 struct team_option_inst *opt_inst;
2515                 char *opt_name;
2516                 bool opt_found = false;
2517
2518                 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2519                         err = -EINVAL;
2520                         goto team_put;
2521                 }
2522                 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2523                                        nl_option, team_nl_option_policy,
2524                                        info->extack);
2525                 if (err)
2526                         goto team_put;
2527                 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2528                     !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2529                         err = -EINVAL;
2530                         goto team_put;
2531                 }
2532                 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2533                 case NLA_U32:
2534                         opt_type = TEAM_OPTION_TYPE_U32;
2535                         break;
2536                 case NLA_STRING:
2537                         opt_type = TEAM_OPTION_TYPE_STRING;
2538                         break;
2539                 case NLA_BINARY:
2540                         opt_type = TEAM_OPTION_TYPE_BINARY;
2541                         break;
2542                 case NLA_FLAG:
2543                         opt_type = TEAM_OPTION_TYPE_BOOL;
2544                         break;
2545                 case NLA_S32:
2546                         opt_type = TEAM_OPTION_TYPE_S32;
2547                         break;
2548                 default:
2549                         goto team_put;
2550                 }
2551
2552                 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2553                 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2554                         err = -EINVAL;
2555                         goto team_put;
2556                 }
2557
2558                 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2559                 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2560                 if (attr)
2561                         opt_port_ifindex = nla_get_u32(attr);
2562
2563                 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2564                 if (attr) {
2565                         opt_is_array = true;
2566                         opt_array_index = nla_get_u32(attr);
2567                 }
2568
2569                 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2570                         struct team_option *option = opt_inst->option;
2571                         struct team_gsetter_ctx ctx;
2572                         struct team_option_inst_info *opt_inst_info;
2573                         int tmp_ifindex;
2574
2575                         opt_inst_info = &opt_inst->info;
2576                         tmp_ifindex = opt_inst_info->port ?
2577                                       opt_inst_info->port->dev->ifindex : 0;
2578                         if (option->type != opt_type ||
2579                             strcmp(option->name, opt_name) ||
2580                             tmp_ifindex != opt_port_ifindex ||
2581                             (option->array_size && !opt_is_array) ||
2582                             opt_inst_info->array_index != opt_array_index)
2583                                 continue;
2584                         opt_found = true;
2585                         ctx.info = opt_inst_info;
2586                         switch (opt_type) {
2587                         case TEAM_OPTION_TYPE_U32:
2588                                 ctx.data.u32_val = nla_get_u32(attr_data);
2589                                 break;
2590                         case TEAM_OPTION_TYPE_STRING:
2591                                 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2592                                         err = -EINVAL;
2593                                         goto team_put;
2594                                 }
2595                                 ctx.data.str_val = nla_data(attr_data);
2596                                 break;
2597                         case TEAM_OPTION_TYPE_BINARY:
2598                                 ctx.data.bin_val.len = nla_len(attr_data);
2599                                 ctx.data.bin_val.ptr = nla_data(attr_data);
2600                                 break;
2601                         case TEAM_OPTION_TYPE_BOOL:
2602                                 ctx.data.bool_val = attr_data ? true : false;
2603                                 break;
2604                         case TEAM_OPTION_TYPE_S32:
2605                                 ctx.data.s32_val = nla_get_s32(attr_data);
2606                                 break;
2607                         default:
2608                                 BUG();
2609                         }
2610                         err = team_option_set(team, opt_inst, &ctx);
2611                         if (err)
2612                                 goto team_put;
2613                         opt_inst->changed = true;
2614                         list_add(&opt_inst->tmp_list, &opt_inst_list);
2615                 }
2616                 if (!opt_found) {
2617                         err = -ENOENT;
2618                         goto team_put;
2619                 }
2620
2621                 err = team_nl_send_event_options_get(team, &opt_inst_list);
2622                 if (err)
2623                         break;
2624         }
2625
2626 team_put:
2627         team_nl_team_put(team);
2628 rtnl_unlock:
2629         rtnl_unlock();
2630         return err;
2631 }
2632
2633 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2634                                      struct team_port *port)
2635 {
2636         struct nlattr *port_item;
2637
2638         port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2639         if (!port_item)
2640                 goto nest_cancel;
2641         if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2642                 goto nest_cancel;
2643         if (port->changed) {
2644                 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2645                         goto nest_cancel;
2646                 port->changed = false;
2647         }
2648         if ((port->removed &&
2649              nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2650             (port->state.linkup &&
2651              nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2652             nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2653             nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2654                 goto nest_cancel;
2655         nla_nest_end(skb, port_item);
2656         return 0;
2657
2658 nest_cancel:
2659         nla_nest_cancel(skb, port_item);
2660         return -EMSGSIZE;
2661 }
2662
2663 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2664                                       int flags, team_nl_send_func_t *send_func,
2665                                       struct team_port *one_port)
2666 {
2667         struct nlattr *port_list;
2668         struct nlmsghdr *nlh;
2669         void *hdr;
2670         struct team_port *port;
2671         int err;
2672         struct sk_buff *skb = NULL;
2673         bool incomplete;
2674         int i;
2675
2676         port = list_first_entry_or_null(&team->port_list,
2677                                         struct team_port, list);
2678
2679 start_again:
2680         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2681         if (err)
2682                 return err;
2683
2684         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2685                           TEAM_CMD_PORT_LIST_GET);
2686         if (!hdr) {
2687                 nlmsg_free(skb);
2688                 return -EMSGSIZE;
2689         }
2690
2691         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2692                 goto nla_put_failure;
2693         port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2694         if (!port_list)
2695                 goto nla_put_failure;
2696
2697         i = 0;
2698         incomplete = false;
2699
2700         /* If one port is selected, called wants to send port list containing
2701          * only this port. Otherwise go through all listed ports and send all
2702          */
2703         if (one_port) {
2704                 err = team_nl_fill_one_port_get(skb, one_port);
2705                 if (err)
2706                         goto errout;
2707         } else if (port) {
2708                 list_for_each_entry_from(port, &team->port_list, list) {
2709                         err = team_nl_fill_one_port_get(skb, port);
2710                         if (err) {
2711                                 if (err == -EMSGSIZE) {
2712                                         if (!i)
2713                                                 goto errout;
2714                                         incomplete = true;
2715                                         break;
2716                                 }
2717                                 goto errout;
2718                         }
2719                         i++;
2720                 }
2721         }
2722
2723         nla_nest_end(skb, port_list);
2724         genlmsg_end(skb, hdr);
2725         if (incomplete)
2726                 goto start_again;
2727
2728 send_done:
2729         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2730         if (!nlh) {
2731                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2732                 if (err)
2733                         return err;
2734                 goto send_done;
2735         }
2736
2737         return send_func(skb, team, portid);
2738
2739 nla_put_failure:
2740         err = -EMSGSIZE;
2741 errout:
2742         genlmsg_cancel(skb, hdr);
2743         nlmsg_free(skb);
2744         return err;
2745 }
2746
2747 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2748                                      struct genl_info *info)
2749 {
2750         struct team *team;
2751         int err;
2752
2753         team = team_nl_team_get(info);
2754         if (!team)
2755                 return -EINVAL;
2756
2757         err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2758                                          NLM_F_ACK, team_nl_send_unicast, NULL);
2759
2760         team_nl_team_put(team);
2761
2762         return err;
2763 }
2764
2765 static const struct genl_ops team_nl_ops[] = {
2766         {
2767                 .cmd = TEAM_CMD_NOOP,
2768                 .doit = team_nl_cmd_noop,
2769                 .policy = team_nl_policy,
2770         },
2771         {
2772                 .cmd = TEAM_CMD_OPTIONS_SET,
2773                 .doit = team_nl_cmd_options_set,
2774                 .policy = team_nl_policy,
2775                 .flags = GENL_ADMIN_PERM,
2776         },
2777         {
2778                 .cmd = TEAM_CMD_OPTIONS_GET,
2779                 .doit = team_nl_cmd_options_get,
2780                 .policy = team_nl_policy,
2781                 .flags = GENL_ADMIN_PERM,
2782         },
2783         {
2784                 .cmd = TEAM_CMD_PORT_LIST_GET,
2785                 .doit = team_nl_cmd_port_list_get,
2786                 .policy = team_nl_policy,
2787                 .flags = GENL_ADMIN_PERM,
2788         },
2789 };
2790
2791 static const struct genl_multicast_group team_nl_mcgrps[] = {
2792         { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2793 };
2794
2795 static struct genl_family team_nl_family __ro_after_init = {
2796         .name           = TEAM_GENL_NAME,
2797         .version        = TEAM_GENL_VERSION,
2798         .maxattr        = TEAM_ATTR_MAX,
2799         .netnsok        = true,
2800         .module         = THIS_MODULE,
2801         .ops            = team_nl_ops,
2802         .n_ops          = ARRAY_SIZE(team_nl_ops),
2803         .mcgrps         = team_nl_mcgrps,
2804         .n_mcgrps       = ARRAY_SIZE(team_nl_mcgrps),
2805 };
2806
2807 static int team_nl_send_multicast(struct sk_buff *skb,
2808                                   struct team *team, u32 portid)
2809 {
2810         return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2811                                        skb, 0, 0, GFP_KERNEL);
2812 }
2813
2814 static int team_nl_send_event_options_get(struct team *team,
2815                                           struct list_head *sel_opt_inst_list)
2816 {
2817         return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2818                                         sel_opt_inst_list);
2819 }
2820
2821 static int team_nl_send_event_port_get(struct team *team,
2822                                        struct team_port *port)
2823 {
2824         return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2825                                           port);
2826 }
2827
2828 static int __init team_nl_init(void)
2829 {
2830         return genl_register_family(&team_nl_family);
2831 }
2832
2833 static void team_nl_fini(void)
2834 {
2835         genl_unregister_family(&team_nl_family);
2836 }
2837
2838
2839 /******************
2840  * Change checkers
2841  ******************/
2842
2843 static void __team_options_change_check(struct team *team)
2844 {
2845         int err;
2846         struct team_option_inst *opt_inst;
2847         LIST_HEAD(sel_opt_inst_list);
2848
2849         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2850                 if (opt_inst->changed)
2851                         list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2852         }
2853         err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2854         if (err && err != -ESRCH)
2855                 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2856                             err);
2857 }
2858
2859 /* rtnl lock is held */
2860
2861 static void __team_port_change_send(struct team_port *port, bool linkup)
2862 {
2863         int err;
2864
2865         port->changed = true;
2866         port->state.linkup = linkup;
2867         team_refresh_port_linkup(port);
2868         if (linkup) {
2869                 struct ethtool_link_ksettings ecmd;
2870
2871                 err = __ethtool_get_link_ksettings(port->dev, &ecmd);
2872                 if (!err) {
2873                         port->state.speed = ecmd.base.speed;
2874                         port->state.duplex = ecmd.base.duplex;
2875                         goto send_event;
2876                 }
2877         }
2878         port->state.speed = 0;
2879         port->state.duplex = 0;
2880
2881 send_event:
2882         err = team_nl_send_event_port_get(port->team, port);
2883         if (err && err != -ESRCH)
2884                 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2885                             port->dev->name, err);
2886
2887 }
2888
2889 static void __team_carrier_check(struct team *team)
2890 {
2891         struct team_port *port;
2892         bool team_linkup;
2893
2894         if (team->user_carrier_enabled)
2895                 return;
2896
2897         team_linkup = false;
2898         list_for_each_entry(port, &team->port_list, list) {
2899                 if (port->linkup) {
2900                         team_linkup = true;
2901                         break;
2902                 }
2903         }
2904
2905         if (team_linkup)
2906                 netif_carrier_on(team->dev);
2907         else
2908                 netif_carrier_off(team->dev);
2909 }
2910
2911 static void __team_port_change_check(struct team_port *port, bool linkup)
2912 {
2913         if (port->state.linkup != linkup)
2914                 __team_port_change_send(port, linkup);
2915         __team_carrier_check(port->team);
2916 }
2917
2918 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2919 {
2920         __team_port_change_send(port, linkup);
2921         __team_carrier_check(port->team);
2922 }
2923
2924 static void __team_port_change_port_removed(struct team_port *port)
2925 {
2926         port->removed = true;
2927         __team_port_change_send(port, false);
2928         __team_carrier_check(port->team);
2929 }
2930
2931 static void team_port_change_check(struct team_port *port, bool linkup)
2932 {
2933         struct team *team = port->team;
2934
2935         mutex_lock(&team->lock);
2936         __team_port_change_check(port, linkup);
2937         mutex_unlock(&team->lock);
2938 }
2939
2940
2941 /************************************
2942  * Net device notifier event handler
2943  ************************************/
2944
2945 static int team_device_event(struct notifier_block *unused,
2946                              unsigned long event, void *ptr)
2947 {
2948         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2949         struct team_port *port;
2950
2951         port = team_port_get_rtnl(dev);
2952         if (!port)
2953                 return NOTIFY_DONE;
2954
2955         switch (event) {
2956         case NETDEV_UP:
2957                 if (netif_carrier_ok(dev))
2958                         team_port_change_check(port, true);
2959                 break;
2960         case NETDEV_DOWN:
2961                 team_port_change_check(port, false);
2962                 break;
2963         case NETDEV_CHANGE:
2964                 if (netif_running(port->dev))
2965                         team_port_change_check(port,
2966                                                !!netif_carrier_ok(port->dev));
2967                 break;
2968         case NETDEV_UNREGISTER:
2969                 team_del_slave(port->team->dev, dev);
2970                 break;
2971         case NETDEV_FEAT_CHANGE:
2972                 team_compute_features(port->team);
2973                 break;
2974         case NETDEV_PRECHANGEMTU:
2975                 /* Forbid to change mtu of underlaying device */
2976                 if (!port->team->port_mtu_change_allowed)
2977                         return NOTIFY_BAD;
2978                 break;
2979         case NETDEV_PRE_TYPE_CHANGE:
2980                 /* Forbid to change type of underlaying device */
2981                 return NOTIFY_BAD;
2982         case NETDEV_RESEND_IGMP:
2983                 /* Propagate to master device */
2984                 call_netdevice_notifiers(event, port->team->dev);
2985                 break;
2986         }
2987         return NOTIFY_DONE;
2988 }
2989
2990 static struct notifier_block team_notifier_block __read_mostly = {
2991         .notifier_call = team_device_event,
2992 };
2993
2994
2995 /***********************
2996  * Module init and exit
2997  ***********************/
2998
2999 static int __init team_module_init(void)
3000 {
3001         int err;
3002
3003         register_netdevice_notifier(&team_notifier_block);
3004
3005         err = rtnl_link_register(&team_link_ops);
3006         if (err)
3007                 goto err_rtnl_reg;
3008
3009         err = team_nl_init();
3010         if (err)
3011                 goto err_nl_init;
3012
3013         return 0;
3014
3015 err_nl_init:
3016         rtnl_link_unregister(&team_link_ops);
3017
3018 err_rtnl_reg:
3019         unregister_netdevice_notifier(&team_notifier_block);
3020
3021         return err;
3022 }
3023
3024 static void __exit team_module_exit(void)
3025 {
3026         team_nl_fini();
3027         rtnl_link_unregister(&team_link_ops);
3028         unregister_netdevice_notifier(&team_notifier_block);
3029 }
3030
3031 module_init(team_module_init);
3032 module_exit(team_module_exit);
3033
3034 MODULE_LICENSE("GPL v2");
3035 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
3036 MODULE_DESCRIPTION("Ethernet team device driver");
3037 MODULE_ALIAS_RTNL_LINK(DRV_NAME);