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         if (dev->flags & IFF_UP) {
1278                 netif_addr_lock_bh(dev);
1279                 dev_uc_sync_multiple(port_dev, dev);
1280                 dev_mc_sync_multiple(port_dev, dev);
1281                 netif_addr_unlock_bh(dev);
1282         }
1283
1284         port->index = -1;
1285         list_add_tail_rcu(&port->list, &team->port_list);
1286         team_port_enable(team, port);
1287         __team_compute_features(team);
1288         __team_port_change_port_added(port, !!netif_carrier_ok(port_dev));
1289         __team_options_change_check(team);
1290
1291         netdev_info(dev, "Port device %s added\n", portname);
1292
1293         return 0;
1294
1295 err_set_slave_promisc:
1296         __team_option_inst_del_port(team, port);
1297
1298 err_option_port_add:
1299         team_upper_dev_unlink(team, port);
1300
1301 err_set_upper_link:
1302         netdev_rx_handler_unregister(port_dev);
1303
1304 err_handler_register:
1305         team_port_disable_netpoll(port);
1306
1307 err_enable_netpoll:
1308         vlan_vids_del_by_dev(port_dev, dev);
1309
1310 err_vids_add:
1311         dev_close(port_dev);
1312
1313 err_dev_open:
1314         team_port_leave(team, port);
1315         team_port_set_orig_dev_addr(port);
1316
1317 err_port_enter:
1318         dev_set_mtu(port_dev, port->orig.mtu);
1319
1320 err_set_mtu:
1321         kfree(port);
1322
1323         return err;
1324 }
1325
1326 static void __team_port_change_port_removed(struct team_port *port);
1327
1328 static int team_port_del(struct team *team, struct net_device *port_dev)
1329 {
1330         struct net_device *dev = team->dev;
1331         struct team_port *port;
1332         char *portname = port_dev->name;
1333
1334         port = team_port_get_rtnl(port_dev);
1335         if (!port || !team_port_find(team, port)) {
1336                 netdev_err(dev, "Device %s does not act as a port of this team\n",
1337                            portname);
1338                 return -ENOENT;
1339         }
1340
1341         team_port_disable(team, port);
1342         list_del_rcu(&port->list);
1343
1344         if (dev->flags & IFF_PROMISC)
1345                 dev_set_promiscuity(port_dev, -1);
1346         if (dev->flags & IFF_ALLMULTI)
1347                 dev_set_allmulti(port_dev, -1);
1348
1349         team_upper_dev_unlink(team, port);
1350         netdev_rx_handler_unregister(port_dev);
1351         team_port_disable_netpoll(port);
1352         vlan_vids_del_by_dev(port_dev, dev);
1353         if (dev->flags & IFF_UP) {
1354                 dev_uc_unsync(port_dev, dev);
1355                 dev_mc_unsync(port_dev, dev);
1356         }
1357         dev_close(port_dev);
1358         team_port_leave(team, port);
1359
1360         __team_option_inst_mark_removed_port(team, port);
1361         __team_options_change_check(team);
1362         __team_option_inst_del_port(team, port);
1363         __team_port_change_port_removed(port);
1364
1365         team_port_set_orig_dev_addr(port);
1366         dev_set_mtu(port_dev, port->orig.mtu);
1367         kfree_rcu(port, rcu);
1368         netdev_info(dev, "Port device %s removed\n", portname);
1369         __team_compute_features(team);
1370
1371         return 0;
1372 }
1373
1374
1375 /*****************
1376  * Net device ops
1377  *****************/
1378
1379 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1380 {
1381         ctx->data.str_val = team->mode->kind;
1382         return 0;
1383 }
1384
1385 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1386 {
1387         return team_change_mode(team, ctx->data.str_val);
1388 }
1389
1390 static int team_notify_peers_count_get(struct team *team,
1391                                        struct team_gsetter_ctx *ctx)
1392 {
1393         ctx->data.u32_val = team->notify_peers.count;
1394         return 0;
1395 }
1396
1397 static int team_notify_peers_count_set(struct team *team,
1398                                        struct team_gsetter_ctx *ctx)
1399 {
1400         team->notify_peers.count = ctx->data.u32_val;
1401         return 0;
1402 }
1403
1404 static int team_notify_peers_interval_get(struct team *team,
1405                                           struct team_gsetter_ctx *ctx)
1406 {
1407         ctx->data.u32_val = team->notify_peers.interval;
1408         return 0;
1409 }
1410
1411 static int team_notify_peers_interval_set(struct team *team,
1412                                           struct team_gsetter_ctx *ctx)
1413 {
1414         team->notify_peers.interval = ctx->data.u32_val;
1415         return 0;
1416 }
1417
1418 static int team_mcast_rejoin_count_get(struct team *team,
1419                                        struct team_gsetter_ctx *ctx)
1420 {
1421         ctx->data.u32_val = team->mcast_rejoin.count;
1422         return 0;
1423 }
1424
1425 static int team_mcast_rejoin_count_set(struct team *team,
1426                                        struct team_gsetter_ctx *ctx)
1427 {
1428         team->mcast_rejoin.count = ctx->data.u32_val;
1429         return 0;
1430 }
1431
1432 static int team_mcast_rejoin_interval_get(struct team *team,
1433                                           struct team_gsetter_ctx *ctx)
1434 {
1435         ctx->data.u32_val = team->mcast_rejoin.interval;
1436         return 0;
1437 }
1438
1439 static int team_mcast_rejoin_interval_set(struct team *team,
1440                                           struct team_gsetter_ctx *ctx)
1441 {
1442         team->mcast_rejoin.interval = ctx->data.u32_val;
1443         return 0;
1444 }
1445
1446 static int team_port_en_option_get(struct team *team,
1447                                    struct team_gsetter_ctx *ctx)
1448 {
1449         struct team_port *port = ctx->info->port;
1450
1451         ctx->data.bool_val = team_port_enabled(port);
1452         return 0;
1453 }
1454
1455 static int team_port_en_option_set(struct team *team,
1456                                    struct team_gsetter_ctx *ctx)
1457 {
1458         struct team_port *port = ctx->info->port;
1459
1460         if (ctx->data.bool_val)
1461                 team_port_enable(team, port);
1462         else
1463                 team_port_disable(team, port);
1464         return 0;
1465 }
1466
1467 static int team_user_linkup_option_get(struct team *team,
1468                                        struct team_gsetter_ctx *ctx)
1469 {
1470         struct team_port *port = ctx->info->port;
1471
1472         ctx->data.bool_val = port->user.linkup;
1473         return 0;
1474 }
1475
1476 static void __team_carrier_check(struct team *team);
1477
1478 static int team_user_linkup_option_set(struct team *team,
1479                                        struct team_gsetter_ctx *ctx)
1480 {
1481         struct team_port *port = ctx->info->port;
1482
1483         port->user.linkup = ctx->data.bool_val;
1484         team_refresh_port_linkup(port);
1485         __team_carrier_check(port->team);
1486         return 0;
1487 }
1488
1489 static int team_user_linkup_en_option_get(struct team *team,
1490                                           struct team_gsetter_ctx *ctx)
1491 {
1492         struct team_port *port = ctx->info->port;
1493
1494         ctx->data.bool_val = port->user.linkup_enabled;
1495         return 0;
1496 }
1497
1498 static int team_user_linkup_en_option_set(struct team *team,
1499                                           struct team_gsetter_ctx *ctx)
1500 {
1501         struct team_port *port = ctx->info->port;
1502
1503         port->user.linkup_enabled = ctx->data.bool_val;
1504         team_refresh_port_linkup(port);
1505         __team_carrier_check(port->team);
1506         return 0;
1507 }
1508
1509 static int team_priority_option_get(struct team *team,
1510                                     struct team_gsetter_ctx *ctx)
1511 {
1512         struct team_port *port = ctx->info->port;
1513
1514         ctx->data.s32_val = port->priority;
1515         return 0;
1516 }
1517
1518 static int team_priority_option_set(struct team *team,
1519                                     struct team_gsetter_ctx *ctx)
1520 {
1521         struct team_port *port = ctx->info->port;
1522         s32 priority = ctx->data.s32_val;
1523
1524         if (port->priority == priority)
1525                 return 0;
1526         port->priority = priority;
1527         team_queue_override_port_prio_changed(team, port);
1528         return 0;
1529 }
1530
1531 static int team_queue_id_option_get(struct team *team,
1532                                     struct team_gsetter_ctx *ctx)
1533 {
1534         struct team_port *port = ctx->info->port;
1535
1536         ctx->data.u32_val = port->queue_id;
1537         return 0;
1538 }
1539
1540 static int team_queue_id_option_set(struct team *team,
1541                                     struct team_gsetter_ctx *ctx)
1542 {
1543         struct team_port *port = ctx->info->port;
1544         u16 new_queue_id = ctx->data.u32_val;
1545
1546         if (port->queue_id == new_queue_id)
1547                 return 0;
1548         if (new_queue_id >= team->dev->real_num_tx_queues)
1549                 return -EINVAL;
1550         team_queue_override_port_change_queue_id(team, port, new_queue_id);
1551         return 0;
1552 }
1553
1554 static const struct team_option team_options[] = {
1555         {
1556                 .name = "mode",
1557                 .type = TEAM_OPTION_TYPE_STRING,
1558                 .getter = team_mode_option_get,
1559                 .setter = team_mode_option_set,
1560         },
1561         {
1562                 .name = "notify_peers_count",
1563                 .type = TEAM_OPTION_TYPE_U32,
1564                 .getter = team_notify_peers_count_get,
1565                 .setter = team_notify_peers_count_set,
1566         },
1567         {
1568                 .name = "notify_peers_interval",
1569                 .type = TEAM_OPTION_TYPE_U32,
1570                 .getter = team_notify_peers_interval_get,
1571                 .setter = team_notify_peers_interval_set,
1572         },
1573         {
1574                 .name = "mcast_rejoin_count",
1575                 .type = TEAM_OPTION_TYPE_U32,
1576                 .getter = team_mcast_rejoin_count_get,
1577                 .setter = team_mcast_rejoin_count_set,
1578         },
1579         {
1580                 .name = "mcast_rejoin_interval",
1581                 .type = TEAM_OPTION_TYPE_U32,
1582                 .getter = team_mcast_rejoin_interval_get,
1583                 .setter = team_mcast_rejoin_interval_set,
1584         },
1585         {
1586                 .name = "enabled",
1587                 .type = TEAM_OPTION_TYPE_BOOL,
1588                 .per_port = true,
1589                 .getter = team_port_en_option_get,
1590                 .setter = team_port_en_option_set,
1591         },
1592         {
1593                 .name = "user_linkup",
1594                 .type = TEAM_OPTION_TYPE_BOOL,
1595                 .per_port = true,
1596                 .getter = team_user_linkup_option_get,
1597                 .setter = team_user_linkup_option_set,
1598         },
1599         {
1600                 .name = "user_linkup_enabled",
1601                 .type = TEAM_OPTION_TYPE_BOOL,
1602                 .per_port = true,
1603                 .getter = team_user_linkup_en_option_get,
1604                 .setter = team_user_linkup_en_option_set,
1605         },
1606         {
1607                 .name = "priority",
1608                 .type = TEAM_OPTION_TYPE_S32,
1609                 .per_port = true,
1610                 .getter = team_priority_option_get,
1611                 .setter = team_priority_option_set,
1612         },
1613         {
1614                 .name = "queue_id",
1615                 .type = TEAM_OPTION_TYPE_U32,
1616                 .per_port = true,
1617                 .getter = team_queue_id_option_get,
1618                 .setter = team_queue_id_option_set,
1619         },
1620 };
1621
1622
1623 static int team_init(struct net_device *dev)
1624 {
1625         struct team *team = netdev_priv(dev);
1626         int i;
1627         int err;
1628
1629         team->dev = dev;
1630         mutex_init(&team->lock);
1631         team_set_no_mode(team);
1632
1633         team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1634         if (!team->pcpu_stats)
1635                 return -ENOMEM;
1636
1637         for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1638                 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1639         INIT_LIST_HEAD(&team->port_list);
1640         err = team_queue_override_init(team);
1641         if (err)
1642                 goto err_team_queue_override_init;
1643
1644         team_adjust_ops(team);
1645
1646         INIT_LIST_HEAD(&team->option_list);
1647         INIT_LIST_HEAD(&team->option_inst_list);
1648
1649         team_notify_peers_init(team);
1650         team_mcast_rejoin_init(team);
1651
1652         err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1653         if (err)
1654                 goto err_options_register;
1655         netif_carrier_off(dev);
1656
1657         netdev_lockdep_set_classes(dev);
1658
1659         return 0;
1660
1661 err_options_register:
1662         team_mcast_rejoin_fini(team);
1663         team_notify_peers_fini(team);
1664         team_queue_override_fini(team);
1665 err_team_queue_override_init:
1666         free_percpu(team->pcpu_stats);
1667
1668         return err;
1669 }
1670
1671 static void team_uninit(struct net_device *dev)
1672 {
1673         struct team *team = netdev_priv(dev);
1674         struct team_port *port;
1675         struct team_port *tmp;
1676
1677         mutex_lock(&team->lock);
1678         list_for_each_entry_safe(port, tmp, &team->port_list, list)
1679                 team_port_del(team, port->dev);
1680
1681         __team_change_mode(team, NULL); /* cleanup */
1682         __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1683         team_mcast_rejoin_fini(team);
1684         team_notify_peers_fini(team);
1685         team_queue_override_fini(team);
1686         mutex_unlock(&team->lock);
1687         netdev_change_features(dev);
1688 }
1689
1690 static void team_destructor(struct net_device *dev)
1691 {
1692         struct team *team = netdev_priv(dev);
1693
1694         free_percpu(team->pcpu_stats);
1695 }
1696
1697 static int team_open(struct net_device *dev)
1698 {
1699         return 0;
1700 }
1701
1702 static int team_close(struct net_device *dev)
1703 {
1704         struct team *team = netdev_priv(dev);
1705         struct team_port *port;
1706
1707         list_for_each_entry(port, &team->port_list, list) {
1708                 dev_uc_unsync(port->dev, dev);
1709                 dev_mc_unsync(port->dev, dev);
1710         }
1711
1712         return 0;
1713 }
1714
1715 /*
1716  * note: already called with rcu_read_lock
1717  */
1718 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1719 {
1720         struct team *team = netdev_priv(dev);
1721         bool tx_success;
1722         unsigned int len = skb->len;
1723
1724         tx_success = team_queue_override_transmit(team, skb);
1725         if (!tx_success)
1726                 tx_success = team->ops.transmit(team, skb);
1727         if (tx_success) {
1728                 struct team_pcpu_stats *pcpu_stats;
1729
1730                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1731                 u64_stats_update_begin(&pcpu_stats->syncp);
1732                 pcpu_stats->tx_packets++;
1733                 pcpu_stats->tx_bytes += len;
1734                 u64_stats_update_end(&pcpu_stats->syncp);
1735         } else {
1736                 this_cpu_inc(team->pcpu_stats->tx_dropped);
1737         }
1738
1739         return NETDEV_TX_OK;
1740 }
1741
1742 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1743                              void *accel_priv, select_queue_fallback_t fallback)
1744 {
1745         /*
1746          * This helper function exists to help dev_pick_tx get the correct
1747          * destination queue.  Using a helper function skips a call to
1748          * skb_tx_hash and will put the skbs in the queue we expect on their
1749          * way down to the team driver.
1750          */
1751         u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1752
1753         /*
1754          * Save the original txq to restore before passing to the driver
1755          */
1756         qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1757
1758         if (unlikely(txq >= dev->real_num_tx_queues)) {
1759                 do {
1760                         txq -= dev->real_num_tx_queues;
1761                 } while (txq >= dev->real_num_tx_queues);
1762         }
1763         return txq;
1764 }
1765
1766 static void team_change_rx_flags(struct net_device *dev, int change)
1767 {
1768         struct team *team = netdev_priv(dev);
1769         struct team_port *port;
1770         int inc;
1771
1772         rcu_read_lock();
1773         list_for_each_entry_rcu(port, &team->port_list, list) {
1774                 if (change & IFF_PROMISC) {
1775                         inc = dev->flags & IFF_PROMISC ? 1 : -1;
1776                         dev_set_promiscuity(port->dev, inc);
1777                 }
1778                 if (change & IFF_ALLMULTI) {
1779                         inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1780                         dev_set_allmulti(port->dev, inc);
1781                 }
1782         }
1783         rcu_read_unlock();
1784 }
1785
1786 static void team_set_rx_mode(struct net_device *dev)
1787 {
1788         struct team *team = netdev_priv(dev);
1789         struct team_port *port;
1790
1791         rcu_read_lock();
1792         list_for_each_entry_rcu(port, &team->port_list, list) {
1793                 dev_uc_sync_multiple(port->dev, dev);
1794                 dev_mc_sync_multiple(port->dev, dev);
1795         }
1796         rcu_read_unlock();
1797 }
1798
1799 static int team_set_mac_address(struct net_device *dev, void *p)
1800 {
1801         struct sockaddr *addr = p;
1802         struct team *team = netdev_priv(dev);
1803         struct team_port *port;
1804
1805         if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1806                 return -EADDRNOTAVAIL;
1807         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1808         mutex_lock(&team->lock);
1809         list_for_each_entry(port, &team->port_list, list)
1810                 if (team->ops.port_change_dev_addr)
1811                         team->ops.port_change_dev_addr(team, port);
1812         mutex_unlock(&team->lock);
1813         return 0;
1814 }
1815
1816 static int team_change_mtu(struct net_device *dev, int new_mtu)
1817 {
1818         struct team *team = netdev_priv(dev);
1819         struct team_port *port;
1820         int err;
1821
1822         /*
1823          * Alhough this is reader, it's guarded by team lock. It's not possible
1824          * to traverse list in reverse under rcu_read_lock
1825          */
1826         mutex_lock(&team->lock);
1827         team->port_mtu_change_allowed = true;
1828         list_for_each_entry(port, &team->port_list, list) {
1829                 err = dev_set_mtu(port->dev, new_mtu);
1830                 if (err) {
1831                         netdev_err(dev, "Device %s failed to change mtu",
1832                                    port->dev->name);
1833                         goto unwind;
1834                 }
1835         }
1836         team->port_mtu_change_allowed = false;
1837         mutex_unlock(&team->lock);
1838
1839         dev->mtu = new_mtu;
1840
1841         return 0;
1842
1843 unwind:
1844         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1845                 dev_set_mtu(port->dev, dev->mtu);
1846         team->port_mtu_change_allowed = false;
1847         mutex_unlock(&team->lock);
1848
1849         return err;
1850 }
1851
1852 static void
1853 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1854 {
1855         struct team *team = netdev_priv(dev);
1856         struct team_pcpu_stats *p;
1857         u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1858         u32 rx_dropped = 0, tx_dropped = 0, rx_nohandler = 0;
1859         unsigned int start;
1860         int i;
1861
1862         for_each_possible_cpu(i) {
1863                 p = per_cpu_ptr(team->pcpu_stats, i);
1864                 do {
1865                         start = u64_stats_fetch_begin_irq(&p->syncp);
1866                         rx_packets      = p->rx_packets;
1867                         rx_bytes        = p->rx_bytes;
1868                         rx_multicast    = p->rx_multicast;
1869                         tx_packets      = p->tx_packets;
1870                         tx_bytes        = p->tx_bytes;
1871                 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
1872
1873                 stats->rx_packets       += rx_packets;
1874                 stats->rx_bytes         += rx_bytes;
1875                 stats->multicast        += rx_multicast;
1876                 stats->tx_packets       += tx_packets;
1877                 stats->tx_bytes         += tx_bytes;
1878                 /*
1879                  * rx_dropped, tx_dropped & rx_nohandler are u32,
1880                  * updated without syncp protection.
1881                  */
1882                 rx_dropped      += p->rx_dropped;
1883                 tx_dropped      += p->tx_dropped;
1884                 rx_nohandler    += p->rx_nohandler;
1885         }
1886         stats->rx_dropped       = rx_dropped;
1887         stats->tx_dropped       = tx_dropped;
1888         stats->rx_nohandler     = rx_nohandler;
1889 }
1890
1891 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1892 {
1893         struct team *team = netdev_priv(dev);
1894         struct team_port *port;
1895         int err;
1896
1897         /*
1898          * Alhough this is reader, it's guarded by team lock. It's not possible
1899          * to traverse list in reverse under rcu_read_lock
1900          */
1901         mutex_lock(&team->lock);
1902         list_for_each_entry(port, &team->port_list, list) {
1903                 err = vlan_vid_add(port->dev, proto, vid);
1904                 if (err)
1905                         goto unwind;
1906         }
1907         mutex_unlock(&team->lock);
1908
1909         return 0;
1910
1911 unwind:
1912         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1913                 vlan_vid_del(port->dev, proto, vid);
1914         mutex_unlock(&team->lock);
1915
1916         return err;
1917 }
1918
1919 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1920 {
1921         struct team *team = netdev_priv(dev);
1922         struct team_port *port;
1923
1924         mutex_lock(&team->lock);
1925         list_for_each_entry(port, &team->port_list, list)
1926                 vlan_vid_del(port->dev, proto, vid);
1927         mutex_unlock(&team->lock);
1928
1929         return 0;
1930 }
1931
1932 #ifdef CONFIG_NET_POLL_CONTROLLER
1933 static void team_poll_controller(struct net_device *dev)
1934 {
1935 }
1936
1937 static void __team_netpoll_cleanup(struct team *team)
1938 {
1939         struct team_port *port;
1940
1941         list_for_each_entry(port, &team->port_list, list)
1942                 team_port_disable_netpoll(port);
1943 }
1944
1945 static void team_netpoll_cleanup(struct net_device *dev)
1946 {
1947         struct team *team = netdev_priv(dev);
1948
1949         mutex_lock(&team->lock);
1950         __team_netpoll_cleanup(team);
1951         mutex_unlock(&team->lock);
1952 }
1953
1954 static int team_netpoll_setup(struct net_device *dev,
1955                               struct netpoll_info *npifo)
1956 {
1957         struct team *team = netdev_priv(dev);
1958         struct team_port *port;
1959         int err = 0;
1960
1961         mutex_lock(&team->lock);
1962         list_for_each_entry(port, &team->port_list, list) {
1963                 err = __team_port_enable_netpoll(port);
1964                 if (err) {
1965                         __team_netpoll_cleanup(team);
1966                         break;
1967                 }
1968         }
1969         mutex_unlock(&team->lock);
1970         return err;
1971 }
1972 #endif
1973
1974 static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
1975 {
1976         struct team *team = netdev_priv(dev);
1977         int err;
1978
1979         mutex_lock(&team->lock);
1980         err = team_port_add(team, port_dev);
1981         mutex_unlock(&team->lock);
1982
1983         if (!err)
1984                 netdev_change_features(dev);
1985
1986         return err;
1987 }
1988
1989 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1990 {
1991         struct team *team = netdev_priv(dev);
1992         int err;
1993
1994         mutex_lock(&team->lock);
1995         err = team_port_del(team, port_dev);
1996         mutex_unlock(&team->lock);
1997
1998         if (!err)
1999                 netdev_change_features(dev);
2000
2001         return err;
2002 }
2003
2004 static netdev_features_t team_fix_features(struct net_device *dev,
2005                                            netdev_features_t features)
2006 {
2007         struct team_port *port;
2008         struct team *team = netdev_priv(dev);
2009         netdev_features_t mask;
2010
2011         mask = features;
2012         features &= ~NETIF_F_ONE_FOR_ALL;
2013         features |= NETIF_F_ALL_FOR_ALL;
2014
2015         rcu_read_lock();
2016         list_for_each_entry_rcu(port, &team->port_list, list) {
2017                 features = netdev_increment_features(features,
2018                                                      port->dev->features,
2019                                                      mask);
2020         }
2021         rcu_read_unlock();
2022
2023         features = netdev_add_tso_features(features, mask);
2024
2025         return features;
2026 }
2027
2028 static int team_change_carrier(struct net_device *dev, bool new_carrier)
2029 {
2030         struct team *team = netdev_priv(dev);
2031
2032         team->user_carrier_enabled = true;
2033
2034         if (new_carrier)
2035                 netif_carrier_on(dev);
2036         else
2037                 netif_carrier_off(dev);
2038         return 0;
2039 }
2040
2041 static const struct net_device_ops team_netdev_ops = {
2042         .ndo_init               = team_init,
2043         .ndo_uninit             = team_uninit,
2044         .ndo_open               = team_open,
2045         .ndo_stop               = team_close,
2046         .ndo_start_xmit         = team_xmit,
2047         .ndo_select_queue       = team_select_queue,
2048         .ndo_change_rx_flags    = team_change_rx_flags,
2049         .ndo_set_rx_mode        = team_set_rx_mode,
2050         .ndo_set_mac_address    = team_set_mac_address,
2051         .ndo_change_mtu         = team_change_mtu,
2052         .ndo_get_stats64        = team_get_stats64,
2053         .ndo_vlan_rx_add_vid    = team_vlan_rx_add_vid,
2054         .ndo_vlan_rx_kill_vid   = team_vlan_rx_kill_vid,
2055 #ifdef CONFIG_NET_POLL_CONTROLLER
2056         .ndo_poll_controller    = team_poll_controller,
2057         .ndo_netpoll_setup      = team_netpoll_setup,
2058         .ndo_netpoll_cleanup    = team_netpoll_cleanup,
2059 #endif
2060         .ndo_add_slave          = team_add_slave,
2061         .ndo_del_slave          = team_del_slave,
2062         .ndo_fix_features       = team_fix_features,
2063         .ndo_change_carrier     = team_change_carrier,
2064         .ndo_features_check     = passthru_features_check,
2065 };
2066
2067 /***********************
2068  * ethtool interface
2069  ***********************/
2070
2071 static void team_ethtool_get_drvinfo(struct net_device *dev,
2072                                      struct ethtool_drvinfo *drvinfo)
2073 {
2074         strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
2075         strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2076 }
2077
2078 static const struct ethtool_ops team_ethtool_ops = {
2079         .get_drvinfo            = team_ethtool_get_drvinfo,
2080         .get_link               = ethtool_op_get_link,
2081 };
2082
2083 /***********************
2084  * rt netlink interface
2085  ***********************/
2086
2087 static void team_setup_by_port(struct net_device *dev,
2088                                struct net_device *port_dev)
2089 {
2090         dev->header_ops = port_dev->header_ops;
2091         dev->type = port_dev->type;
2092         dev->hard_header_len = port_dev->hard_header_len;
2093         dev->needed_headroom = port_dev->needed_headroom;
2094         dev->addr_len = port_dev->addr_len;
2095         dev->mtu = port_dev->mtu;
2096         memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2097         eth_hw_addr_inherit(dev, port_dev);
2098 }
2099
2100 static int team_dev_type_check_change(struct net_device *dev,
2101                                       struct net_device *port_dev)
2102 {
2103         struct team *team = netdev_priv(dev);
2104         char *portname = port_dev->name;
2105         int err;
2106
2107         if (dev->type == port_dev->type)
2108                 return 0;
2109         if (!list_empty(&team->port_list)) {
2110                 netdev_err(dev, "Device %s is of different type\n", portname);
2111                 return -EBUSY;
2112         }
2113         err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2114         err = notifier_to_errno(err);
2115         if (err) {
2116                 netdev_err(dev, "Refused to change device type\n");
2117                 return err;
2118         }
2119         dev_uc_flush(dev);
2120         dev_mc_flush(dev);
2121         team_setup_by_port(dev, port_dev);
2122         call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2123         return 0;
2124 }
2125
2126 static void team_setup(struct net_device *dev)
2127 {
2128         ether_setup(dev);
2129         dev->max_mtu = ETH_MAX_MTU;
2130
2131         dev->netdev_ops = &team_netdev_ops;
2132         dev->ethtool_ops = &team_ethtool_ops;
2133         dev->needs_free_netdev = true;
2134         dev->priv_destructor = team_destructor;
2135         dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2136         dev->priv_flags |= IFF_NO_QUEUE;
2137         dev->priv_flags |= IFF_TEAM;
2138
2139         /*
2140          * Indicate we support unicast address filtering. That way core won't
2141          * bring us to promisc mode in case a unicast addr is added.
2142          * Let this up to underlay drivers.
2143          */
2144         dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2145
2146         dev->features |= NETIF_F_LLTX;
2147         dev->features |= NETIF_F_GRO;
2148
2149         /* Don't allow team devices to change network namespaces. */
2150         dev->features |= NETIF_F_NETNS_LOCAL;
2151
2152         dev->hw_features = TEAM_VLAN_FEATURES |
2153                            NETIF_F_HW_VLAN_CTAG_RX |
2154                            NETIF_F_HW_VLAN_CTAG_FILTER;
2155
2156         dev->hw_features |= NETIF_F_GSO_ENCAP_ALL;
2157         dev->features |= dev->hw_features;
2158         dev->features |= NETIF_F_HW_VLAN_CTAG_TX;
2159 }
2160
2161 static int team_newlink(struct net *src_net, struct net_device *dev,
2162                         struct nlattr *tb[], struct nlattr *data[],
2163                         struct netlink_ext_ack *extack)
2164 {
2165         if (tb[IFLA_ADDRESS] == NULL)
2166                 eth_hw_addr_random(dev);
2167
2168         return register_netdevice(dev);
2169 }
2170
2171 static int team_validate(struct nlattr *tb[], struct nlattr *data[],
2172                          struct netlink_ext_ack *extack)
2173 {
2174         if (tb[IFLA_ADDRESS]) {
2175                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2176                         return -EINVAL;
2177                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2178                         return -EADDRNOTAVAIL;
2179         }
2180         return 0;
2181 }
2182
2183 static unsigned int team_get_num_tx_queues(void)
2184 {
2185         return TEAM_DEFAULT_NUM_TX_QUEUES;
2186 }
2187
2188 static unsigned int team_get_num_rx_queues(void)
2189 {
2190         return TEAM_DEFAULT_NUM_RX_QUEUES;
2191 }
2192
2193 static struct rtnl_link_ops team_link_ops __read_mostly = {
2194         .kind                   = DRV_NAME,
2195         .priv_size              = sizeof(struct team),
2196         .setup                  = team_setup,
2197         .newlink                = team_newlink,
2198         .validate               = team_validate,
2199         .get_num_tx_queues      = team_get_num_tx_queues,
2200         .get_num_rx_queues      = team_get_num_rx_queues,
2201 };
2202
2203
2204 /***********************************
2205  * Generic netlink custom interface
2206  ***********************************/
2207
2208 static struct genl_family team_nl_family;
2209
2210 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2211         [TEAM_ATTR_UNSPEC]                      = { .type = NLA_UNSPEC, },
2212         [TEAM_ATTR_TEAM_IFINDEX]                = { .type = NLA_U32 },
2213         [TEAM_ATTR_LIST_OPTION]                 = { .type = NLA_NESTED },
2214         [TEAM_ATTR_LIST_PORT]                   = { .type = NLA_NESTED },
2215 };
2216
2217 static const struct nla_policy
2218 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2219         [TEAM_ATTR_OPTION_UNSPEC]               = { .type = NLA_UNSPEC, },
2220         [TEAM_ATTR_OPTION_NAME] = {
2221                 .type = NLA_STRING,
2222                 .len = TEAM_STRING_MAX_LEN,
2223         },
2224         [TEAM_ATTR_OPTION_CHANGED]              = { .type = NLA_FLAG },
2225         [TEAM_ATTR_OPTION_TYPE]                 = { .type = NLA_U8 },
2226         [TEAM_ATTR_OPTION_DATA]                 = { .type = NLA_BINARY },
2227         [TEAM_ATTR_OPTION_PORT_IFINDEX]         = { .type = NLA_U32 },
2228         [TEAM_ATTR_OPTION_ARRAY_INDEX]          = { .type = NLA_U32 },
2229 };
2230
2231 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2232 {
2233         struct sk_buff *msg;
2234         void *hdr;
2235         int err;
2236
2237         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2238         if (!msg)
2239                 return -ENOMEM;
2240
2241         hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2242                           &team_nl_family, 0, TEAM_CMD_NOOP);
2243         if (!hdr) {
2244                 err = -EMSGSIZE;
2245                 goto err_msg_put;
2246         }
2247
2248         genlmsg_end(msg, hdr);
2249
2250         return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2251
2252 err_msg_put:
2253         nlmsg_free(msg);
2254
2255         return err;
2256 }
2257
2258 /*
2259  * Netlink cmd functions should be locked by following two functions.
2260  * Since dev gets held here, that ensures dev won't disappear in between.
2261  */
2262 static struct team *team_nl_team_get(struct genl_info *info)
2263 {
2264         struct net *net = genl_info_net(info);
2265         int ifindex;
2266         struct net_device *dev;
2267         struct team *team;
2268
2269         if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2270                 return NULL;
2271
2272         ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2273         dev = dev_get_by_index(net, ifindex);
2274         if (!dev || dev->netdev_ops != &team_netdev_ops) {
2275                 if (dev)
2276                         dev_put(dev);
2277                 return NULL;
2278         }
2279
2280         team = netdev_priv(dev);
2281         mutex_lock(&team->lock);
2282         return team;
2283 }
2284
2285 static void team_nl_team_put(struct team *team)
2286 {
2287         mutex_unlock(&team->lock);
2288         dev_put(team->dev);
2289 }
2290
2291 typedef int team_nl_send_func_t(struct sk_buff *skb,
2292                                 struct team *team, u32 portid);
2293
2294 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2295 {
2296         return genlmsg_unicast(dev_net(team->dev), skb, portid);
2297 }
2298
2299 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2300                                        struct team_option_inst *opt_inst)
2301 {
2302         struct nlattr *option_item;
2303         struct team_option *option = opt_inst->option;
2304         struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2305         struct team_gsetter_ctx ctx;
2306         int err;
2307
2308         ctx.info = opt_inst_info;
2309         err = team_option_get(team, opt_inst, &ctx);
2310         if (err)
2311                 return err;
2312
2313         option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
2314         if (!option_item)
2315                 return -EMSGSIZE;
2316
2317         if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2318                 goto nest_cancel;
2319         if (opt_inst_info->port &&
2320             nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2321                         opt_inst_info->port->dev->ifindex))
2322                 goto nest_cancel;
2323         if (opt_inst->option->array_size &&
2324             nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2325                         opt_inst_info->array_index))
2326                 goto nest_cancel;
2327
2328         switch (option->type) {
2329         case TEAM_OPTION_TYPE_U32:
2330                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2331                         goto nest_cancel;
2332                 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2333                         goto nest_cancel;
2334                 break;
2335         case TEAM_OPTION_TYPE_STRING:
2336                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2337                         goto nest_cancel;
2338                 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2339                                    ctx.data.str_val))
2340                         goto nest_cancel;
2341                 break;
2342         case TEAM_OPTION_TYPE_BINARY:
2343                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2344                         goto nest_cancel;
2345                 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2346                             ctx.data.bin_val.ptr))
2347                         goto nest_cancel;
2348                 break;
2349         case TEAM_OPTION_TYPE_BOOL:
2350                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2351                         goto nest_cancel;
2352                 if (ctx.data.bool_val &&
2353                     nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2354                         goto nest_cancel;
2355                 break;
2356         case TEAM_OPTION_TYPE_S32:
2357                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2358                         goto nest_cancel;
2359                 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2360                         goto nest_cancel;
2361                 break;
2362         default:
2363                 BUG();
2364         }
2365         if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2366                 goto nest_cancel;
2367         if (opt_inst->changed) {
2368                 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2369                         goto nest_cancel;
2370                 opt_inst->changed = false;
2371         }
2372         nla_nest_end(skb, option_item);
2373         return 0;
2374
2375 nest_cancel:
2376         nla_nest_cancel(skb, option_item);
2377         return -EMSGSIZE;
2378 }
2379
2380 static int __send_and_alloc_skb(struct sk_buff **pskb,
2381                                 struct team *team, u32 portid,
2382                                 team_nl_send_func_t *send_func)
2383 {
2384         int err;
2385
2386         if (*pskb) {
2387                 err = send_func(*pskb, team, portid);
2388                 if (err)
2389                         return err;
2390         }
2391         *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2392         if (!*pskb)
2393                 return -ENOMEM;
2394         return 0;
2395 }
2396
2397 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2398                                     int flags, team_nl_send_func_t *send_func,
2399                                     struct list_head *sel_opt_inst_list)
2400 {
2401         struct nlattr *option_list;
2402         struct nlmsghdr *nlh;
2403         void *hdr;
2404         struct team_option_inst *opt_inst;
2405         int err;
2406         struct sk_buff *skb = NULL;
2407         bool incomplete;
2408         int i;
2409
2410         opt_inst = list_first_entry(sel_opt_inst_list,
2411                                     struct team_option_inst, tmp_list);
2412
2413 start_again:
2414         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2415         if (err)
2416                 return err;
2417
2418         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2419                           TEAM_CMD_OPTIONS_GET);
2420         if (!hdr) {
2421                 nlmsg_free(skb);
2422                 return -EMSGSIZE;
2423         }
2424
2425         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2426                 goto nla_put_failure;
2427         option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2428         if (!option_list)
2429                 goto nla_put_failure;
2430
2431         i = 0;
2432         incomplete = false;
2433         list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2434                 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2435                 if (err) {
2436                         if (err == -EMSGSIZE) {
2437                                 if (!i)
2438                                         goto errout;
2439                                 incomplete = true;
2440                                 break;
2441                         }
2442                         goto errout;
2443                 }
2444                 i++;
2445         }
2446
2447         nla_nest_end(skb, option_list);
2448         genlmsg_end(skb, hdr);
2449         if (incomplete)
2450                 goto start_again;
2451
2452 send_done:
2453         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2454         if (!nlh) {
2455                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2456                 if (err)
2457                         return err;
2458                 goto send_done;
2459         }
2460
2461         return send_func(skb, team, portid);
2462
2463 nla_put_failure:
2464         err = -EMSGSIZE;
2465 errout:
2466         genlmsg_cancel(skb, hdr);
2467         nlmsg_free(skb);
2468         return err;
2469 }
2470
2471 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2472 {
2473         struct team *team;
2474         struct team_option_inst *opt_inst;
2475         int err;
2476         LIST_HEAD(sel_opt_inst_list);
2477
2478         team = team_nl_team_get(info);
2479         if (!team)
2480                 return -EINVAL;
2481
2482         list_for_each_entry(opt_inst, &team->option_inst_list, list)
2483                 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2484         err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2485                                        NLM_F_ACK, team_nl_send_unicast,
2486                                        &sel_opt_inst_list);
2487
2488         team_nl_team_put(team);
2489
2490         return err;
2491 }
2492
2493 static int team_nl_send_event_options_get(struct team *team,
2494                                           struct list_head *sel_opt_inst_list);
2495
2496 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2497 {
2498         struct team *team;
2499         int err = 0;
2500         int i;
2501         struct nlattr *nl_option;
2502
2503         rtnl_lock();
2504
2505         team = team_nl_team_get(info);
2506         if (!team) {
2507                 err = -EINVAL;
2508                 goto rtnl_unlock;
2509         }
2510
2511         err = -EINVAL;
2512         if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2513                 err = -EINVAL;
2514                 goto team_put;
2515         }
2516
2517         nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2518                 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2519                 struct nlattr *attr;
2520                 struct nlattr *attr_data;
2521                 LIST_HEAD(opt_inst_list);
2522                 enum team_option_type opt_type;
2523                 int opt_port_ifindex = 0; /* != 0 for per-port options */
2524                 u32 opt_array_index = 0;
2525                 bool opt_is_array = false;
2526                 struct team_option_inst *opt_inst;
2527                 char *opt_name;
2528                 bool opt_found = false;
2529
2530                 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2531                         err = -EINVAL;
2532                         goto team_put;
2533                 }
2534                 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2535                                        nl_option, team_nl_option_policy,
2536                                        info->extack);
2537                 if (err)
2538                         goto team_put;
2539                 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2540                     !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2541                         err = -EINVAL;
2542                         goto team_put;
2543                 }
2544                 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2545                 case NLA_U32:
2546                         opt_type = TEAM_OPTION_TYPE_U32;
2547                         break;
2548                 case NLA_STRING:
2549                         opt_type = TEAM_OPTION_TYPE_STRING;
2550                         break;
2551                 case NLA_BINARY:
2552                         opt_type = TEAM_OPTION_TYPE_BINARY;
2553                         break;
2554                 case NLA_FLAG:
2555                         opt_type = TEAM_OPTION_TYPE_BOOL;
2556                         break;
2557                 case NLA_S32:
2558                         opt_type = TEAM_OPTION_TYPE_S32;
2559                         break;
2560                 default:
2561                         goto team_put;
2562                 }
2563
2564                 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2565                 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2566                         err = -EINVAL;
2567                         goto team_put;
2568                 }
2569
2570                 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2571                 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2572                 if (attr)
2573                         opt_port_ifindex = nla_get_u32(attr);
2574
2575                 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2576                 if (attr) {
2577                         opt_is_array = true;
2578                         opt_array_index = nla_get_u32(attr);
2579                 }
2580
2581                 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2582                         struct team_option *option = opt_inst->option;
2583                         struct team_gsetter_ctx ctx;
2584                         struct team_option_inst_info *opt_inst_info;
2585                         int tmp_ifindex;
2586
2587                         opt_inst_info = &opt_inst->info;
2588                         tmp_ifindex = opt_inst_info->port ?
2589                                       opt_inst_info->port->dev->ifindex : 0;
2590                         if (option->type != opt_type ||
2591                             strcmp(option->name, opt_name) ||
2592                             tmp_ifindex != opt_port_ifindex ||
2593                             (option->array_size && !opt_is_array) ||
2594                             opt_inst_info->array_index != opt_array_index)
2595                                 continue;
2596                         opt_found = true;
2597                         ctx.info = opt_inst_info;
2598                         switch (opt_type) {
2599                         case TEAM_OPTION_TYPE_U32:
2600                                 ctx.data.u32_val = nla_get_u32(attr_data);
2601                                 break;
2602                         case TEAM_OPTION_TYPE_STRING:
2603                                 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2604                                         err = -EINVAL;
2605                                         goto team_put;
2606                                 }
2607                                 ctx.data.str_val = nla_data(attr_data);
2608                                 break;
2609                         case TEAM_OPTION_TYPE_BINARY:
2610                                 ctx.data.bin_val.len = nla_len(attr_data);
2611                                 ctx.data.bin_val.ptr = nla_data(attr_data);
2612                                 break;
2613                         case TEAM_OPTION_TYPE_BOOL:
2614                                 ctx.data.bool_val = attr_data ? true : false;
2615                                 break;
2616                         case TEAM_OPTION_TYPE_S32:
2617                                 ctx.data.s32_val = nla_get_s32(attr_data);
2618                                 break;
2619                         default:
2620                                 BUG();
2621                         }
2622                         err = team_option_set(team, opt_inst, &ctx);
2623                         if (err)
2624                                 goto team_put;
2625                         opt_inst->changed = true;
2626                         list_add(&opt_inst->tmp_list, &opt_inst_list);
2627                 }
2628                 if (!opt_found) {
2629                         err = -ENOENT;
2630                         goto team_put;
2631                 }
2632
2633                 err = team_nl_send_event_options_get(team, &opt_inst_list);
2634                 if (err)
2635                         break;
2636         }
2637
2638 team_put:
2639         team_nl_team_put(team);
2640 rtnl_unlock:
2641         rtnl_unlock();
2642         return err;
2643 }
2644
2645 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2646                                      struct team_port *port)
2647 {
2648         struct nlattr *port_item;
2649
2650         port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2651         if (!port_item)
2652                 goto nest_cancel;
2653         if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2654                 goto nest_cancel;
2655         if (port->changed) {
2656                 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2657                         goto nest_cancel;
2658                 port->changed = false;
2659         }
2660         if ((port->removed &&
2661              nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2662             (port->state.linkup &&
2663              nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2664             nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2665             nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2666                 goto nest_cancel;
2667         nla_nest_end(skb, port_item);
2668         return 0;
2669
2670 nest_cancel:
2671         nla_nest_cancel(skb, port_item);
2672         return -EMSGSIZE;
2673 }
2674
2675 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2676                                       int flags, team_nl_send_func_t *send_func,
2677                                       struct team_port *one_port)
2678 {
2679         struct nlattr *port_list;
2680         struct nlmsghdr *nlh;
2681         void *hdr;
2682         struct team_port *port;
2683         int err;
2684         struct sk_buff *skb = NULL;
2685         bool incomplete;
2686         int i;
2687
2688         port = list_first_entry_or_null(&team->port_list,
2689                                         struct team_port, list);
2690
2691 start_again:
2692         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2693         if (err)
2694                 return err;
2695
2696         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2697                           TEAM_CMD_PORT_LIST_GET);
2698         if (!hdr) {
2699                 nlmsg_free(skb);
2700                 return -EMSGSIZE;
2701         }
2702
2703         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2704                 goto nla_put_failure;
2705         port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2706         if (!port_list)
2707                 goto nla_put_failure;
2708
2709         i = 0;
2710         incomplete = false;
2711
2712         /* If one port is selected, called wants to send port list containing
2713          * only this port. Otherwise go through all listed ports and send all
2714          */
2715         if (one_port) {
2716                 err = team_nl_fill_one_port_get(skb, one_port);
2717                 if (err)
2718                         goto errout;
2719         } else if (port) {
2720                 list_for_each_entry_from(port, &team->port_list, list) {
2721                         err = team_nl_fill_one_port_get(skb, port);
2722                         if (err) {
2723                                 if (err == -EMSGSIZE) {
2724                                         if (!i)
2725                                                 goto errout;
2726                                         incomplete = true;
2727                                         break;
2728                                 }
2729                                 goto errout;
2730                         }
2731                         i++;
2732                 }
2733         }
2734
2735         nla_nest_end(skb, port_list);
2736         genlmsg_end(skb, hdr);
2737         if (incomplete)
2738                 goto start_again;
2739
2740 send_done:
2741         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2742         if (!nlh) {
2743                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2744                 if (err)
2745                         return err;
2746                 goto send_done;
2747         }
2748
2749         return send_func(skb, team, portid);
2750
2751 nla_put_failure:
2752         err = -EMSGSIZE;
2753 errout:
2754         genlmsg_cancel(skb, hdr);
2755         nlmsg_free(skb);
2756         return err;
2757 }
2758
2759 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2760                                      struct genl_info *info)
2761 {
2762         struct team *team;
2763         int err;
2764
2765         team = team_nl_team_get(info);
2766         if (!team)
2767                 return -EINVAL;
2768
2769         err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2770                                          NLM_F_ACK, team_nl_send_unicast, NULL);
2771
2772         team_nl_team_put(team);
2773
2774         return err;
2775 }
2776
2777 static const struct genl_ops team_nl_ops[] = {
2778         {
2779                 .cmd = TEAM_CMD_NOOP,
2780                 .doit = team_nl_cmd_noop,
2781                 .policy = team_nl_policy,
2782         },
2783         {
2784                 .cmd = TEAM_CMD_OPTIONS_SET,
2785                 .doit = team_nl_cmd_options_set,
2786                 .policy = team_nl_policy,
2787                 .flags = GENL_ADMIN_PERM,
2788         },
2789         {
2790                 .cmd = TEAM_CMD_OPTIONS_GET,
2791                 .doit = team_nl_cmd_options_get,
2792                 .policy = team_nl_policy,
2793                 .flags = GENL_ADMIN_PERM,
2794         },
2795         {
2796                 .cmd = TEAM_CMD_PORT_LIST_GET,
2797                 .doit = team_nl_cmd_port_list_get,
2798                 .policy = team_nl_policy,
2799                 .flags = GENL_ADMIN_PERM,
2800         },
2801 };
2802
2803 static const struct genl_multicast_group team_nl_mcgrps[] = {
2804         { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2805 };
2806
2807 static struct genl_family team_nl_family __ro_after_init = {
2808         .name           = TEAM_GENL_NAME,
2809         .version        = TEAM_GENL_VERSION,
2810         .maxattr        = TEAM_ATTR_MAX,
2811         .netnsok        = true,
2812         .module         = THIS_MODULE,
2813         .ops            = team_nl_ops,
2814         .n_ops          = ARRAY_SIZE(team_nl_ops),
2815         .mcgrps         = team_nl_mcgrps,
2816         .n_mcgrps       = ARRAY_SIZE(team_nl_mcgrps),
2817 };
2818
2819 static int team_nl_send_multicast(struct sk_buff *skb,
2820                                   struct team *team, u32 portid)
2821 {
2822         return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2823                                        skb, 0, 0, GFP_KERNEL);
2824 }
2825
2826 static int team_nl_send_event_options_get(struct team *team,
2827                                           struct list_head *sel_opt_inst_list)
2828 {
2829         return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2830                                         sel_opt_inst_list);
2831 }
2832
2833 static int team_nl_send_event_port_get(struct team *team,
2834                                        struct team_port *port)
2835 {
2836         return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2837                                           port);
2838 }
2839
2840 static int __init team_nl_init(void)
2841 {
2842         return genl_register_family(&team_nl_family);
2843 }
2844
2845 static void team_nl_fini(void)
2846 {
2847         genl_unregister_family(&team_nl_family);
2848 }
2849
2850
2851 /******************
2852  * Change checkers
2853  ******************/
2854
2855 static void __team_options_change_check(struct team *team)
2856 {
2857         int err;
2858         struct team_option_inst *opt_inst;
2859         LIST_HEAD(sel_opt_inst_list);
2860
2861         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2862                 if (opt_inst->changed)
2863                         list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2864         }
2865         err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2866         if (err && err != -ESRCH)
2867                 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2868                             err);
2869 }
2870
2871 /* rtnl lock is held */
2872
2873 static void __team_port_change_send(struct team_port *port, bool linkup)
2874 {
2875         int err;
2876
2877         port->changed = true;
2878         port->state.linkup = linkup;
2879         team_refresh_port_linkup(port);
2880         if (linkup) {
2881                 struct ethtool_link_ksettings ecmd;
2882
2883                 err = __ethtool_get_link_ksettings(port->dev, &ecmd);
2884                 if (!err) {
2885                         port->state.speed = ecmd.base.speed;
2886                         port->state.duplex = ecmd.base.duplex;
2887                         goto send_event;
2888                 }
2889         }
2890         port->state.speed = 0;
2891         port->state.duplex = 0;
2892
2893 send_event:
2894         err = team_nl_send_event_port_get(port->team, port);
2895         if (err && err != -ESRCH)
2896                 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2897                             port->dev->name, err);
2898
2899 }
2900
2901 static void __team_carrier_check(struct team *team)
2902 {
2903         struct team_port *port;
2904         bool team_linkup;
2905
2906         if (team->user_carrier_enabled)
2907                 return;
2908
2909         team_linkup = false;
2910         list_for_each_entry(port, &team->port_list, list) {
2911                 if (port->linkup) {
2912                         team_linkup = true;
2913                         break;
2914                 }
2915         }
2916
2917         if (team_linkup)
2918                 netif_carrier_on(team->dev);
2919         else
2920                 netif_carrier_off(team->dev);
2921 }
2922
2923 static void __team_port_change_check(struct team_port *port, bool linkup)
2924 {
2925         if (port->state.linkup != linkup)
2926                 __team_port_change_send(port, linkup);
2927         __team_carrier_check(port->team);
2928 }
2929
2930 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2931 {
2932         __team_port_change_send(port, linkup);
2933         __team_carrier_check(port->team);
2934 }
2935
2936 static void __team_port_change_port_removed(struct team_port *port)
2937 {
2938         port->removed = true;
2939         __team_port_change_send(port, false);
2940         __team_carrier_check(port->team);
2941 }
2942
2943 static void team_port_change_check(struct team_port *port, bool linkup)
2944 {
2945         struct team *team = port->team;
2946
2947         mutex_lock(&team->lock);
2948         __team_port_change_check(port, linkup);
2949         mutex_unlock(&team->lock);
2950 }
2951
2952
2953 /************************************
2954  * Net device notifier event handler
2955  ************************************/
2956
2957 static int team_device_event(struct notifier_block *unused,
2958                              unsigned long event, void *ptr)
2959 {
2960         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2961         struct team_port *port;
2962
2963         port = team_port_get_rtnl(dev);
2964         if (!port)
2965                 return NOTIFY_DONE;
2966
2967         switch (event) {
2968         case NETDEV_UP:
2969                 if (netif_carrier_ok(dev))
2970                         team_port_change_check(port, true);
2971                 break;
2972         case NETDEV_DOWN:
2973                 team_port_change_check(port, false);
2974                 break;
2975         case NETDEV_CHANGE:
2976                 if (netif_running(port->dev))
2977                         team_port_change_check(port,
2978                                                !!netif_carrier_ok(port->dev));
2979                 break;
2980         case NETDEV_UNREGISTER:
2981                 team_del_slave(port->team->dev, dev);
2982                 break;
2983         case NETDEV_FEAT_CHANGE:
2984                 team_compute_features(port->team);
2985                 break;
2986         case NETDEV_PRECHANGEMTU:
2987                 /* Forbid to change mtu of underlaying device */
2988                 if (!port->team->port_mtu_change_allowed)
2989                         return NOTIFY_BAD;
2990                 break;
2991         case NETDEV_PRE_TYPE_CHANGE:
2992                 /* Forbid to change type of underlaying device */
2993                 return NOTIFY_BAD;
2994         case NETDEV_RESEND_IGMP:
2995                 /* Propagate to master device */
2996                 call_netdevice_notifiers(event, port->team->dev);
2997                 break;
2998         }
2999         return NOTIFY_DONE;
3000 }
3001
3002 static struct notifier_block team_notifier_block __read_mostly = {
3003         .notifier_call = team_device_event,
3004 };
3005
3006
3007 /***********************
3008  * Module init and exit
3009  ***********************/
3010
3011 static int __init team_module_init(void)
3012 {
3013         int err;
3014
3015         register_netdevice_notifier(&team_notifier_block);
3016
3017         err = rtnl_link_register(&team_link_ops);
3018         if (err)
3019                 goto err_rtnl_reg;
3020
3021         err = team_nl_init();
3022         if (err)
3023                 goto err_nl_init;
3024
3025         return 0;
3026
3027 err_nl_init:
3028         rtnl_link_unregister(&team_link_ops);
3029
3030 err_rtnl_reg:
3031         unregister_netdevice_notifier(&team_notifier_block);
3032
3033         return err;
3034 }
3035
3036 static void __exit team_module_exit(void)
3037 {
3038         team_nl_fini();
3039         rtnl_link_unregister(&team_link_ops);
3040         unregister_netdevice_notifier(&team_notifier_block);
3041 }
3042
3043 module_init(team_module_init);
3044 module_exit(team_module_exit);
3045
3046 MODULE_LICENSE("GPL v2");
3047 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
3048 MODULE_DESCRIPTION("Ethernet team device driver");
3049 MODULE_ALIAS_RTNL_LINK(DRV_NAME);