drivers/net/team/team.c

   1 /*
   2  * drivers/net/team/team.c - Network team device driver
   3  * Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/types.h>
  13 #include <linux/module.h>
  14 #include <linux/init.h>
  15 #include <linux/slab.h>
  16 #include <linux/rcupdate.h>
  17 #include <linux/errno.h>
  18 #include <linux/ctype.h>
  19 #include <linux/notifier.h>
  20 #include <linux/netdevice.h>
  21 #include <linux/netpoll.h>
  22 #include <linux/if_vlan.h>
  23 #include <linux/if_arp.h>
  24 #include <linux/socket.h>
  25 #include <linux/etherdevice.h>
  26 #include <linux/rtnetlink.h>
  27 #include <net/rtnetlink.h>
  28 #include <net/genetlink.h>
  29 #include <net/netlink.h>
  30 #include <net/sch_generic.h>
  31 #include <net/switchdev.h>
  32 #include <generated/utsrelease.h>
  33 #include <linux/if_team.h>
  34
  35 #define DRV_NAME "team"
  36
  37
  38 /**********
  39  * Helpers
  40  **********/
  41
  42 #define team_port_exists(dev) (dev->priv_flags & IFF_TEAM_PORT)
  43
  44 static struct team_port *team_port_get_rcu(const struct net_device *dev)
  45 {
  46         return rcu_dereference(dev->rx_handler_data);
  47 }
  48
  49 static struct team_port *team_port_get_rtnl(const struct net_device *dev)
  50 {
  51         struct team_port *port = rtnl_dereference(dev->rx_handler_data);
  52
  53         return team_port_exists(dev) ? port : NULL;
  54 }
  55
  56 /*
  57  * Since the ability to change device address for open port device is tested in
  58  * team_port_add, this function can be called without control of return value
  59  */
  60 static int __set_port_dev_addr(struct net_device *port_dev,
  61                                const unsigned char *dev_addr)
  62 {
  63         struct sockaddr addr;
  64
  65         memcpy(addr.sa_data, dev_addr, port_dev->addr_len);
  66         addr.sa_family = port_dev->type;
  67         return dev_set_mac_address(port_dev, &addr);
  68 }
  69
  70 static int team_port_set_orig_dev_addr(struct team_port *port)
  71 {
  72         return __set_port_dev_addr(port->dev, port->orig.dev_addr);
  73 }
  74
  75 static int team_port_set_team_dev_addr(struct team *team,
  76                                        struct team_port *port)
  77 {
  78         return __set_port_dev_addr(port->dev, team->dev->dev_addr);
  79 }
  80
  81 int team_modeop_port_enter(struct team *team, struct team_port *port)
  82 {
  83         return team_port_set_team_dev_addr(team, port);
  84 }
  85 EXPORT_SYMBOL(team_modeop_port_enter);
  86
  87 void team_modeop_port_change_dev_addr(struct team *team,
  88                                       struct team_port *port)
  89 {
  90         team_port_set_team_dev_addr(team, port);
  91 }
  92 EXPORT_SYMBOL(team_modeop_port_change_dev_addr);
  93
  94 static void team_lower_state_changed(struct team_port *port)
  95 {
  96         struct netdev_lag_lower_state_info info;
  97
  98         info.link_up = port->linkup;
  99         info.tx_enabled = team_port_enabled(port);
 100         netdev_lower_state_changed(port->dev, &info);
 101 }
 102
 103 static void team_refresh_port_linkup(struct team_port *port)
 104 {
 105         bool new_linkup = port->user.linkup_enabled ? port->user.linkup :
 106                                                       port->state.linkup;
 107
 108         if (port->linkup != new_linkup) {
 109                 port->linkup = new_linkup;
 110                 team_lower_state_changed(port);
 111         }
 112 }
 113
 114
 115 /*******************
 116  * Options handling
 117  *******************/
 118
 119 struct team_option_inst { /* One for each option instance */
 120         struct list_head list;
 121         struct list_head tmp_list;
 122         struct team_option *option;
 123         struct team_option_inst_info info;
 124         bool changed;
 125         bool removed;
 126 };
 127
 128 static struct team_option *__team_find_option(struct team *team,
 129                                               const char *opt_name)
 130 {
 131         struct team_option *option;
 132
 133         list_for_each_entry(option, &team->option_list, list) {
 134                 if (strcmp(option->name, opt_name) == 0)
 135                         return option;
 136         }
 137         return NULL;
 138 }
 139
 140 static void __team_option_inst_del(struct team_option_inst *opt_inst)
 141 {
 142         list_del(&opt_inst->list);
 143         kfree(opt_inst);
 144 }
 145
 146 static void __team_option_inst_del_option(struct team *team,
 147                                           struct team_option *option)
 148 {
 149         struct team_option_inst *opt_inst, *tmp;
 150
 151         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 152                 if (opt_inst->option == option)
 153                         __team_option_inst_del(opt_inst);
 154         }
 155 }
 156
 157 static int __team_option_inst_add(struct team *team, struct team_option *option,
 158                                   struct team_port *port)
 159 {
 160         struct team_option_inst *opt_inst;
 161         unsigned int array_size;
 162         unsigned int i;
 163         int err;
 164
 165         array_size = option->array_size;
 166         if (!array_size)
 167                 array_size = 1; /* No array but still need one instance */
 168
 169         for (i = 0; i < array_size; i++) {
 170                 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL);
 171                 if (!opt_inst)
 172                         return -ENOMEM;
 173                 opt_inst->option = option;
 174                 opt_inst->info.port = port;
 175                 opt_inst->info.array_index = i;
 176                 opt_inst->changed = true;
 177                 opt_inst->removed = false;
 178                 list_add_tail(&opt_inst->list, &team->option_inst_list);
 179                 if (option->init) {
 180                         err = option->init(team, &opt_inst->info);
 181                         if (err)
 182                                 return err;
 183                 }
 184
 185         }
 186         return 0;
 187 }
 188
 189 static int __team_option_inst_add_option(struct team *team,
 190                                          struct team_option *option)
 191 {
 192         int err;
 193
 194         if (!option->per_port) {
 195                 err = __team_option_inst_add(team, option, NULL);
 196                 if (err)
 197                         goto inst_del_option;
 198         }
 199         return 0;
 200
 201 inst_del_option:
 202         __team_option_inst_del_option(team, option);
 203         return err;
 204 }
 205
 206 static void __team_option_inst_mark_removed_option(struct team *team,
 207                                                    struct team_option *option)
 208 {
 209         struct team_option_inst *opt_inst;
 210
 211         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 212                 if (opt_inst->option == option) {
 213                         opt_inst->changed = true;
 214                         opt_inst->removed = true;
 215                 }
 216         }
 217 }
 218
 219 static void __team_option_inst_del_port(struct team *team,
 220                                         struct team_port *port)
 221 {
 222         struct team_option_inst *opt_inst, *tmp;
 223
 224         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 225                 if (opt_inst->option->per_port &&
 226                     opt_inst->info.port == port)
 227                         __team_option_inst_del(opt_inst);
 228         }
 229 }
 230
 231 static int __team_option_inst_add_port(struct team *team,
 232                                        struct team_port *port)
 233 {
 234         struct team_option *option;
 235         int err;
 236
 237         list_for_each_entry(option, &team->option_list, list) {
 238                 if (!option->per_port)
 239                         continue;
 240                 err = __team_option_inst_add(team, option, port);
 241                 if (err)
 242                         goto inst_del_port;
 243         }
 244         return 0;
 245
 246 inst_del_port:
 247         __team_option_inst_del_port(team, port);
 248         return err;
 249 }
 250
 251 static void __team_option_inst_mark_removed_port(struct team *team,
 252                                                  struct team_port *port)
 253 {
 254         struct team_option_inst *opt_inst;
 255
 256         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 257                 if (opt_inst->info.port == port) {
 258                         opt_inst->changed = true;
 259                         opt_inst->removed = true;
 260                 }
 261         }
 262 }
 263
 264 static int __team_options_register(struct team *team,
 265                                    const struct team_option *option,
 266                                    size_t option_count)
 267 {
 268         int i;
 269         struct team_option **dst_opts;
 270         int err;
 271
 272         dst_opts = kzalloc(sizeof(struct team_option *) * option_count,
 273                            GFP_KERNEL);
 274         if (!dst_opts)
 275                 return -ENOMEM;
 276         for (i = 0; i < option_count; i++, option++) {
 277                 if (__team_find_option(team, option->name)) {
 278                         err = -EEXIST;
 279                         goto alloc_rollback;
 280                 }
 281                 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
 282                 if (!dst_opts[i]) {
 283                         err = -ENOMEM;
 284                         goto alloc_rollback;
 285                 }
 286         }
 287
 288         for (i = 0; i < option_count; i++) {
 289                 err = __team_option_inst_add_option(team, dst_opts[i]);
 290                 if (err)
 291                         goto inst_rollback;
 292                 list_add_tail(&dst_opts[i]->list, &team->option_list);
 293         }
 294
 295         kfree(dst_opts);
 296         return 0;
 297
 298 inst_rollback:
 299         for (i--; i >= 0; i--)
 300                 __team_option_inst_del_option(team, dst_opts[i]);
 301
 302         i = option_count;
 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         list_for_each_entry(port, &team->port_list, list) {
1006                 vlan_features = netdev_increment_features(vlan_features,
1007                                         port->dev->vlan_features,
1008                                         TEAM_VLAN_FEATURES);
1009                 enc_features =
1010                         netdev_increment_features(enc_features,
1011                                                   port->dev->hw_enc_features,
1012                                                   TEAM_ENC_FEATURES);
1013
1014
1015                 dst_release_flag &= port->dev->priv_flags;
1016                 if (port->dev->hard_header_len > max_hard_header_len)
1017                         max_hard_header_len = port->dev->hard_header_len;
1018         }
1019
1020         team->dev->vlan_features = vlan_features;
1021         team->dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL |
1022                                      NETIF_F_HW_VLAN_CTAG_TX |
1023                                      NETIF_F_HW_VLAN_STAG_TX;
1024         team->dev->hard_header_len = max_hard_header_len;
1025
1026         team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
1027         if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
1028                 team->dev->priv_flags |= IFF_XMIT_DST_RELEASE;
1029 }
1030
1031 static void __team_compute_features(struct team *team)
1032 {
1033         ___team_compute_features(team);
1034         netdev_change_features(team->dev);
1035 }
1036
1037 static void team_compute_features(struct team *team)
1038 {
1039         mutex_lock(&team->lock);
1040         ___team_compute_features(team);
1041         mutex_unlock(&team->lock);
1042         netdev_change_features(team->dev);
1043 }
1044
1045 static int team_port_enter(struct team *team, struct team_port *port)
1046 {
1047         int err = 0;
1048
1049         dev_hold(team->dev);
1050         if (team->ops.port_enter) {
1051                 err = team->ops.port_enter(team, port);
1052                 if (err) {
1053                         netdev_err(team->dev, "Device %s failed to enter team mode\n",
1054                                    port->dev->name);
1055                         goto err_port_enter;
1056                 }
1057         }
1058
1059         return 0;
1060
1061 err_port_enter:
1062         dev_put(team->dev);
1063
1064         return err;
1065 }
1066
1067 static void team_port_leave(struct team *team, struct team_port *port)
1068 {
1069         if (team->ops.port_leave)
1070                 team->ops.port_leave(team, port);
1071         dev_put(team->dev);
1072 }
1073
1074 #ifdef CONFIG_NET_POLL_CONTROLLER
1075 static int __team_port_enable_netpoll(struct team_port *port)
1076 {
1077         struct netpoll *np;
1078         int err;
1079
1080         np = kzalloc(sizeof(*np), GFP_KERNEL);
1081         if (!np)
1082                 return -ENOMEM;
1083
1084         err = __netpoll_setup(np, port->dev);
1085         if (err) {
1086                 kfree(np);
1087                 return err;
1088         }
1089         port->np = np;
1090         return err;
1091 }
1092
1093 static int team_port_enable_netpoll(struct team_port *port)
1094 {
1095         if (!port->team->dev->npinfo)
1096                 return 0;
1097
1098         return __team_port_enable_netpoll(port);
1099 }
1100
1101 static void team_port_disable_netpoll(struct team_port *port)
1102 {
1103         struct netpoll *np = port->np;
1104
1105         if (!np)
1106                 return;
1107         port->np = NULL;
1108
1109         /* Wait for transmitting packets to finish before freeing. */
1110         synchronize_rcu_bh();
1111         __netpoll_cleanup(np);
1112         kfree(np);
1113 }
1114 #else
1115 static int team_port_enable_netpoll(struct team_port *port)
1116 {
1117         return 0;
1118 }
1119 static void team_port_disable_netpoll(struct team_port *port)
1120 {
1121 }
1122 #endif
1123
1124 static int team_upper_dev_link(struct team *team, struct team_port *port)
1125 {
1126         struct netdev_lag_upper_info lag_upper_info;
1127         int err;
1128
1129         lag_upper_info.tx_type = team->mode->lag_tx_type;
1130         err = netdev_master_upper_dev_link(port->dev, team->dev, NULL,
1131                                            &lag_upper_info);
1132         if (err)
1133                 return err;
1134         port->dev->priv_flags |= IFF_TEAM_PORT;
1135         return 0;
1136 }
1137
1138 static void team_upper_dev_unlink(struct team *team, struct team_port *port)
1139 {
1140         netdev_upper_dev_unlink(port->dev, team->dev);
1141         port->dev->priv_flags &= ~IFF_TEAM_PORT;
1142 }
1143
1144 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1145 static int team_dev_type_check_change(struct net_device *dev,
1146                                       struct net_device *port_dev);
1147
1148 static int team_port_add(struct team *team, struct net_device *port_dev)
1149 {
1150         struct net_device *dev = team->dev;
1151         struct team_port *port;
1152         char *portname = port_dev->name;
1153         int err;
1154
1155         if (port_dev->flags & IFF_LOOPBACK) {
1156                 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1157                            portname);
1158                 return -EINVAL;
1159         }
1160
1161         if (team_port_exists(port_dev)) {
1162                 netdev_err(dev, "Device %s is already a port "
1163                                 "of a team device\n", portname);
1164                 return -EBUSY;
1165         }
1166
1167         if (dev == port_dev) {
1168                 netdev_err(dev, "Cannot enslave team device to itself\n");
1169                 return -EINVAL;
1170         }
1171
1172         if (netdev_has_upper_dev(dev, port_dev)) {
1173                 netdev_err(dev, "Device %s is already an upper device of the team interface\n",
1174                            portname);
1175                 return -EBUSY;
1176         }
1177
1178         if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1179             vlan_uses_dev(dev)) {
1180                 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1181                            portname);
1182                 return -EPERM;
1183         }
1184
1185         err = team_dev_type_check_change(dev, port_dev);
1186         if (err)
1187                 return err;
1188
1189         if (port_dev->flags & IFF_UP) {
1190                 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1191                            portname);
1192                 return -EBUSY;
1193         }
1194
1195         port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1196                        GFP_KERNEL);
1197         if (!port)
1198                 return -ENOMEM;
1199
1200         port->dev = port_dev;
1201         port->team = team;
1202         INIT_LIST_HEAD(&port->qom_list);
1203
1204         port->orig.mtu = port_dev->mtu;
1205         err = dev_set_mtu(port_dev, dev->mtu);
1206         if (err) {
1207                 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1208                 goto err_set_mtu;
1209         }
1210
1211         memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1212
1213         err = team_port_enter(team, port);
1214         if (err) {
1215                 netdev_err(dev, "Device %s failed to enter team mode\n",
1216                            portname);
1217                 goto err_port_enter;
1218         }
1219
1220         err = dev_open(port_dev);
1221         if (err) {
1222                 netdev_dbg(dev, "Device %s opening failed\n",
1223                            portname);
1224                 goto err_dev_open;
1225         }
1226
1227         err = vlan_vids_add_by_dev(port_dev, dev);
1228         if (err) {
1229                 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1230                                 portname);
1231                 goto err_vids_add;
1232         }
1233
1234         err = team_port_enable_netpoll(port);
1235         if (err) {
1236                 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1237                            portname);
1238                 goto err_enable_netpoll;
1239         }
1240
1241         if (!(dev->features & NETIF_F_LRO))
1242                 dev_disable_lro(port_dev);
1243
1244         err = netdev_rx_handler_register(port_dev, team_handle_frame,
1245                                          port);
1246         if (err) {
1247                 netdev_err(dev, "Device %s failed to register rx_handler\n",
1248                            portname);
1249                 goto err_handler_register;
1250         }
1251
1252         err = team_upper_dev_link(team, port);
1253         if (err) {
1254                 netdev_err(dev, "Device %s failed to set upper link\n",
1255                            portname);
1256                 goto err_set_upper_link;
1257         }
1258
1259         err = __team_option_inst_add_port(team, port);
1260         if (err) {
1261                 netdev_err(dev, "Device %s failed to add per-port options\n",
1262                            portname);
1263                 goto err_option_port_add;
1264         }
1265
1266         /* set promiscuity level to new slave */
1267         if (dev->flags & IFF_PROMISC) {
1268                 err = dev_set_promiscuity(port_dev, 1);
1269                 if (err)
1270                         goto err_set_slave_promisc;
1271         }
1272
1273         /* set allmulti level to new slave */
1274         if (dev->flags & IFF_ALLMULTI) {
1275                 err = dev_set_allmulti(port_dev, 1);
1276                 if (err) {
1277                         if (dev->flags & IFF_PROMISC)
1278                                 dev_set_promiscuity(port_dev, -1);
1279                         goto err_set_slave_promisc;
1280                 }
1281         }
1282
1283         netif_addr_lock_bh(dev);
1284         dev_uc_sync_multiple(port_dev, dev);
1285         dev_mc_sync_multiple(port_dev, dev);
1286         netif_addr_unlock_bh(dev);
1287
1288         port->index = -1;
1289         list_add_tail_rcu(&port->list, &team->port_list);
1290         team_port_enable(team, port);
1291         __team_compute_features(team);
1292         __team_port_change_port_added(port, !!netif_carrier_ok(port_dev));
1293         __team_options_change_check(team);
1294
1295         netdev_info(dev, "Port device %s added\n", portname);
1296
1297         return 0;
1298
1299 err_set_slave_promisc:
1300         __team_option_inst_del_port(team, port);
1301
1302 err_option_port_add:
1303         team_upper_dev_unlink(team, port);
1304
1305 err_set_upper_link:
1306         netdev_rx_handler_unregister(port_dev);
1307
1308 err_handler_register:
1309         team_port_disable_netpoll(port);
1310
1311 err_enable_netpoll:
1312         vlan_vids_del_by_dev(port_dev, dev);
1313
1314 err_vids_add:
1315         dev_close(port_dev);
1316
1317 err_dev_open:
1318         team_port_leave(team, port);
1319         team_port_set_orig_dev_addr(port);
1320
1321 err_port_enter:
1322         dev_set_mtu(port_dev, port->orig.mtu);
1323
1324 err_set_mtu:
1325         kfree(port);
1326
1327         return err;
1328 }
1329
1330 static void __team_port_change_port_removed(struct team_port *port);
1331
1332 static int team_port_del(struct team *team, struct net_device *port_dev)
1333 {
1334         struct net_device *dev = team->dev;
1335         struct team_port *port;
1336         char *portname = port_dev->name;
1337
1338         port = team_port_get_rtnl(port_dev);
1339         if (!port || !team_port_find(team, port)) {
1340                 netdev_err(dev, "Device %s does not act as a port of this team\n",
1341                            portname);
1342                 return -ENOENT;
1343         }
1344
1345         team_port_disable(team, port);
1346         list_del_rcu(&port->list);
1347
1348         if (dev->flags & IFF_PROMISC)
1349                 dev_set_promiscuity(port_dev, -1);
1350         if (dev->flags & IFF_ALLMULTI)
1351                 dev_set_allmulti(port_dev, -1);
1352
1353         team_upper_dev_unlink(team, port);
1354         netdev_rx_handler_unregister(port_dev);
1355         team_port_disable_netpoll(port);
1356         vlan_vids_del_by_dev(port_dev, dev);
1357         dev_uc_unsync(port_dev, dev);
1358         dev_mc_unsync(port_dev, dev);
1359         dev_close(port_dev);
1360         team_port_leave(team, port);
1361
1362         __team_option_inst_mark_removed_port(team, port);
1363         __team_options_change_check(team);
1364         __team_option_inst_del_port(team, port);
1365         __team_port_change_port_removed(port);
1366
1367         team_port_set_orig_dev_addr(port);
1368         dev_set_mtu(port_dev, port->orig.mtu);
1369         kfree_rcu(port, rcu);
1370         netdev_info(dev, "Port device %s removed\n", portname);
1371         __team_compute_features(team);
1372
1373         return 0;
1374 }
1375
1376
1377 /*****************
1378  * Net device ops
1379  *****************/
1380
1381 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1382 {
1383         ctx->data.str_val = team->mode->kind;
1384         return 0;
1385 }
1386
1387 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1388 {
1389         return team_change_mode(team, ctx->data.str_val);
1390 }
1391
1392 static int team_notify_peers_count_get(struct team *team,
1393                                        struct team_gsetter_ctx *ctx)
1394 {
1395         ctx->data.u32_val = team->notify_peers.count;
1396         return 0;
1397 }
1398
1399 static int team_notify_peers_count_set(struct team *team,
1400                                        struct team_gsetter_ctx *ctx)
1401 {
1402         team->notify_peers.count = ctx->data.u32_val;
1403         return 0;
1404 }
1405
1406 static int team_notify_peers_interval_get(struct team *team,
1407                                           struct team_gsetter_ctx *ctx)
1408 {
1409         ctx->data.u32_val = team->notify_peers.interval;
1410         return 0;
1411 }
1412
1413 static int team_notify_peers_interval_set(struct team *team,
1414                                           struct team_gsetter_ctx *ctx)
1415 {
1416         team->notify_peers.interval = ctx->data.u32_val;
1417         return 0;
1418 }
1419
1420 static int team_mcast_rejoin_count_get(struct team *team,
1421                                        struct team_gsetter_ctx *ctx)
1422 {
1423         ctx->data.u32_val = team->mcast_rejoin.count;
1424         return 0;
1425 }
1426
1427 static int team_mcast_rejoin_count_set(struct team *team,
1428                                        struct team_gsetter_ctx *ctx)
1429 {
1430         team->mcast_rejoin.count = ctx->data.u32_val;
1431         return 0;
1432 }
1433
1434 static int team_mcast_rejoin_interval_get(struct team *team,
1435                                           struct team_gsetter_ctx *ctx)
1436 {
1437         ctx->data.u32_val = team->mcast_rejoin.interval;
1438         return 0;
1439 }
1440
1441 static int team_mcast_rejoin_interval_set(struct team *team,
1442                                           struct team_gsetter_ctx *ctx)
1443 {
1444         team->mcast_rejoin.interval = ctx->data.u32_val;
1445         return 0;
1446 }
1447
1448 static int team_port_en_option_get(struct team *team,
1449                                    struct team_gsetter_ctx *ctx)
1450 {
1451         struct team_port *port = ctx->info->port;
1452
1453         ctx->data.bool_val = team_port_enabled(port);
1454         return 0;
1455 }
1456
1457 static int team_port_en_option_set(struct team *team,
1458                                    struct team_gsetter_ctx *ctx)
1459 {
1460         struct team_port *port = ctx->info->port;
1461
1462         if (ctx->data.bool_val)
1463                 team_port_enable(team, port);
1464         else
1465                 team_port_disable(team, port);
1466         return 0;
1467 }
1468
1469 static int team_user_linkup_option_get(struct team *team,
1470                                        struct team_gsetter_ctx *ctx)
1471 {
1472         struct team_port *port = ctx->info->port;
1473
1474         ctx->data.bool_val = port->user.linkup;
1475         return 0;
1476 }
1477
1478 static void __team_carrier_check(struct team *team);
1479
1480 static int team_user_linkup_option_set(struct team *team,
1481                                        struct team_gsetter_ctx *ctx)
1482 {
1483         struct team_port *port = ctx->info->port;
1484
1485         port->user.linkup = ctx->data.bool_val;
1486         team_refresh_port_linkup(port);
1487         __team_carrier_check(port->team);
1488         return 0;
1489 }
1490
1491 static int team_user_linkup_en_option_get(struct team *team,
1492                                           struct team_gsetter_ctx *ctx)
1493 {
1494         struct team_port *port = ctx->info->port;
1495
1496         ctx->data.bool_val = port->user.linkup_enabled;
1497         return 0;
1498 }
1499
1500 static int team_user_linkup_en_option_set(struct team *team,
1501                                           struct team_gsetter_ctx *ctx)
1502 {
1503         struct team_port *port = ctx->info->port;
1504
1505         port->user.linkup_enabled = ctx->data.bool_val;
1506         team_refresh_port_linkup(port);
1507         __team_carrier_check(port->team);
1508         return 0;
1509 }
1510
1511 static int team_priority_option_get(struct team *team,
1512                                     struct team_gsetter_ctx *ctx)
1513 {
1514         struct team_port *port = ctx->info->port;
1515
1516         ctx->data.s32_val = port->priority;
1517         return 0;
1518 }
1519
1520 static int team_priority_option_set(struct team *team,
1521                                     struct team_gsetter_ctx *ctx)
1522 {
1523         struct team_port *port = ctx->info->port;
1524         s32 priority = ctx->data.s32_val;
1525
1526         if (port->priority == priority)
1527                 return 0;
1528         port->priority = priority;
1529         team_queue_override_port_prio_changed(team, port);
1530         return 0;
1531 }
1532
1533 static int team_queue_id_option_get(struct team *team,
1534                                     struct team_gsetter_ctx *ctx)
1535 {
1536         struct team_port *port = ctx->info->port;
1537
1538         ctx->data.u32_val = port->queue_id;
1539         return 0;
1540 }
1541
1542 static int team_queue_id_option_set(struct team *team,
1543                                     struct team_gsetter_ctx *ctx)
1544 {
1545         struct team_port *port = ctx->info->port;
1546         u16 new_queue_id = ctx->data.u32_val;
1547
1548         if (port->queue_id == new_queue_id)
1549                 return 0;
1550         if (new_queue_id >= team->dev->real_num_tx_queues)
1551                 return -EINVAL;
1552         team_queue_override_port_change_queue_id(team, port, new_queue_id);
1553         return 0;
1554 }
1555
1556 static const struct team_option team_options[] = {
1557         {
1558                 .name = "mode",
1559                 .type = TEAM_OPTION_TYPE_STRING,
1560                 .getter = team_mode_option_get,
1561                 .setter = team_mode_option_set,
1562         },
1563         {
1564                 .name = "notify_peers_count",
1565                 .type = TEAM_OPTION_TYPE_U32,
1566                 .getter = team_notify_peers_count_get,
1567                 .setter = team_notify_peers_count_set,
1568         },
1569         {
1570                 .name = "notify_peers_interval",
1571                 .type = TEAM_OPTION_TYPE_U32,
1572                 .getter = team_notify_peers_interval_get,
1573                 .setter = team_notify_peers_interval_set,
1574         },
1575         {
1576                 .name = "mcast_rejoin_count",
1577                 .type = TEAM_OPTION_TYPE_U32,
1578                 .getter = team_mcast_rejoin_count_get,
1579                 .setter = team_mcast_rejoin_count_set,
1580         },
1581         {
1582                 .name = "mcast_rejoin_interval",
1583                 .type = TEAM_OPTION_TYPE_U32,
1584                 .getter = team_mcast_rejoin_interval_get,
1585                 .setter = team_mcast_rejoin_interval_set,
1586         },
1587         {
1588                 .name = "enabled",
1589                 .type = TEAM_OPTION_TYPE_BOOL,
1590                 .per_port = true,
1591                 .getter = team_port_en_option_get,
1592                 .setter = team_port_en_option_set,
1593         },
1594         {
1595                 .name = "user_linkup",
1596                 .type = TEAM_OPTION_TYPE_BOOL,
1597                 .per_port = true,
1598                 .getter = team_user_linkup_option_get,
1599                 .setter = team_user_linkup_option_set,
1600         },
1601         {
1602                 .name = "user_linkup_enabled",
1603                 .type = TEAM_OPTION_TYPE_BOOL,
1604                 .per_port = true,
1605                 .getter = team_user_linkup_en_option_get,
1606                 .setter = team_user_linkup_en_option_set,
1607         },
1608         {
1609                 .name = "priority",
1610                 .type = TEAM_OPTION_TYPE_S32,
1611                 .per_port = true,
1612                 .getter = team_priority_option_get,
1613                 .setter = team_priority_option_set,
1614         },
1615         {
1616                 .name = "queue_id",
1617                 .type = TEAM_OPTION_TYPE_U32,
1618                 .per_port = true,
1619                 .getter = team_queue_id_option_get,
1620                 .setter = team_queue_id_option_set,
1621         },
1622 };
1623
1624
1625 static int team_init(struct net_device *dev)
1626 {
1627         struct team *team = netdev_priv(dev);
1628         int i;
1629         int err;
1630
1631         team->dev = dev;
1632         mutex_init(&team->lock);
1633         team_set_no_mode(team);
1634
1635         team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1636         if (!team->pcpu_stats)
1637                 return -ENOMEM;
1638
1639         for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1640                 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1641         INIT_LIST_HEAD(&team->port_list);
1642         err = team_queue_override_init(team);
1643         if (err)
1644                 goto err_team_queue_override_init;
1645
1646         team_adjust_ops(team);
1647
1648         INIT_LIST_HEAD(&team->option_list);
1649         INIT_LIST_HEAD(&team->option_inst_list);
1650
1651         team_notify_peers_init(team);
1652         team_mcast_rejoin_init(team);
1653
1654         err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1655         if (err)
1656                 goto err_options_register;
1657         netif_carrier_off(dev);
1658
1659         netdev_lockdep_set_classes(dev);
1660
1661         return 0;
1662
1663 err_options_register:
1664         team_mcast_rejoin_fini(team);
1665         team_notify_peers_fini(team);
1666         team_queue_override_fini(team);
1667 err_team_queue_override_init:
1668         free_percpu(team->pcpu_stats);
1669
1670         return err;
1671 }
1672
1673 static void team_uninit(struct net_device *dev)
1674 {
1675         struct team *team = netdev_priv(dev);
1676         struct team_port *port;
1677         struct team_port *tmp;
1678
1679         mutex_lock(&team->lock);
1680         list_for_each_entry_safe(port, tmp, &team->port_list, list)
1681                 team_port_del(team, port->dev);
1682
1683         __team_change_mode(team, NULL); /* cleanup */
1684         __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1685         team_mcast_rejoin_fini(team);
1686         team_notify_peers_fini(team);
1687         team_queue_override_fini(team);
1688         mutex_unlock(&team->lock);
1689 }
1690
1691 static void team_destructor(struct net_device *dev)
1692 {
1693         struct team *team = netdev_priv(dev);
1694
1695         free_percpu(team->pcpu_stats);
1696         free_netdev(dev);
1697 }
1698
1699 static int team_open(struct net_device *dev)
1700 {
1701         return 0;
1702 }
1703
1704 static int team_close(struct net_device *dev)
1705 {
1706         return 0;
1707 }
1708
1709 /*
1710  * note: already called with rcu_read_lock
1711  */
1712 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1713 {
1714         struct team *team = netdev_priv(dev);
1715         bool tx_success;
1716         unsigned int len = skb->len;
1717
1718         tx_success = team_queue_override_transmit(team, skb);
1719         if (!tx_success)
1720                 tx_success = team->ops.transmit(team, skb);
1721         if (tx_success) {
1722                 struct team_pcpu_stats *pcpu_stats;
1723
1724                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1725                 u64_stats_update_begin(&pcpu_stats->syncp);
1726                 pcpu_stats->tx_packets++;
1727                 pcpu_stats->tx_bytes += len;
1728                 u64_stats_update_end(&pcpu_stats->syncp);
1729         } else {
1730                 this_cpu_inc(team->pcpu_stats->tx_dropped);
1731         }
1732
1733         return NETDEV_TX_OK;
1734 }
1735
1736 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1737                              void *accel_priv, select_queue_fallback_t fallback)
1738 {
1739         /*
1740          * This helper function exists to help dev_pick_tx get the correct
1741          * destination queue.  Using a helper function skips a call to
1742          * skb_tx_hash and will put the skbs in the queue we expect on their
1743          * way down to the team driver.
1744          */
1745         u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1746
1747         /*
1748          * Save the original txq to restore before passing to the driver
1749          */
1750         qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1751
1752         if (unlikely(txq >= dev->real_num_tx_queues)) {
1753                 do {
1754                         txq -= dev->real_num_tx_queues;
1755                 } while (txq >= dev->real_num_tx_queues);
1756         }
1757         return txq;
1758 }
1759
1760 static void team_change_rx_flags(struct net_device *dev, int change)
1761 {
1762         struct team *team = netdev_priv(dev);
1763         struct team_port *port;
1764         int inc;
1765
1766         rcu_read_lock();
1767         list_for_each_entry_rcu(port, &team->port_list, list) {
1768                 if (change & IFF_PROMISC) {
1769                         inc = dev->flags & IFF_PROMISC ? 1 : -1;
1770                         dev_set_promiscuity(port->dev, inc);
1771                 }
1772                 if (change & IFF_ALLMULTI) {
1773                         inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1774                         dev_set_allmulti(port->dev, inc);
1775                 }
1776         }
1777         rcu_read_unlock();
1778 }
1779
1780 static void team_set_rx_mode(struct net_device *dev)
1781 {
1782         struct team *team = netdev_priv(dev);
1783         struct team_port *port;
1784
1785         rcu_read_lock();
1786         list_for_each_entry_rcu(port, &team->port_list, list) {
1787                 dev_uc_sync_multiple(port->dev, dev);
1788                 dev_mc_sync_multiple(port->dev, dev);
1789         }
1790         rcu_read_unlock();
1791 }
1792
1793 static int team_set_mac_address(struct net_device *dev, void *p)
1794 {
1795         struct sockaddr *addr = p;
1796         struct team *team = netdev_priv(dev);
1797         struct team_port *port;
1798
1799         if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1800                 return -EADDRNOTAVAIL;
1801         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1802         mutex_lock(&team->lock);
1803         list_for_each_entry(port, &team->port_list, list)
1804                 if (team->ops.port_change_dev_addr)
1805                         team->ops.port_change_dev_addr(team, port);
1806         mutex_unlock(&team->lock);
1807         return 0;
1808 }
1809
1810 static int team_change_mtu(struct net_device *dev, int new_mtu)
1811 {
1812         struct team *team = netdev_priv(dev);
1813         struct team_port *port;
1814         int err;
1815
1816         /*
1817          * Alhough this is reader, it's guarded by team lock. It's not possible
1818          * to traverse list in reverse under rcu_read_lock
1819          */
1820         mutex_lock(&team->lock);
1821         team->port_mtu_change_allowed = true;
1822         list_for_each_entry(port, &team->port_list, list) {
1823                 err = dev_set_mtu(port->dev, new_mtu);
1824                 if (err) {
1825                         netdev_err(dev, "Device %s failed to change mtu",
1826                                    port->dev->name);
1827                         goto unwind;
1828                 }
1829         }
1830         team->port_mtu_change_allowed = false;
1831         mutex_unlock(&team->lock);
1832
1833         dev->mtu = new_mtu;
1834
1835         return 0;
1836
1837 unwind:
1838         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1839                 dev_set_mtu(port->dev, dev->mtu);
1840         team->port_mtu_change_allowed = false;
1841         mutex_unlock(&team->lock);
1842
1843         return err;
1844 }
1845
1846 static struct rtnl_link_stats64 *
1847 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1848 {
1849         struct team *team = netdev_priv(dev);
1850         struct team_pcpu_stats *p;
1851         u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1852         u32 rx_dropped = 0, tx_dropped = 0, rx_nohandler = 0;
1853         unsigned int start;
1854         int i;
1855
1856         for_each_possible_cpu(i) {
1857                 p = per_cpu_ptr(team->pcpu_stats, i);
1858                 do {
1859                         start = u64_stats_fetch_begin_irq(&p->syncp);
1860                         rx_packets      = p->rx_packets;
1861                         rx_bytes        = p->rx_bytes;
1862                         rx_multicast    = p->rx_multicast;
1863                         tx_packets      = p->tx_packets;
1864                         tx_bytes        = p->tx_bytes;
1865                 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
1866
1867                 stats->rx_packets       += rx_packets;
1868                 stats->rx_bytes         += rx_bytes;
1869                 stats->multicast        += rx_multicast;
1870                 stats->tx_packets       += tx_packets;
1871                 stats->tx_bytes         += tx_bytes;
1872                 /*
1873                  * rx_dropped, tx_dropped & rx_nohandler are u32,
1874                  * updated without syncp protection.
1875                  */
1876                 rx_dropped      += p->rx_dropped;
1877                 tx_dropped      += p->tx_dropped;
1878                 rx_nohandler    += p->rx_nohandler;
1879         }
1880         stats->rx_dropped       = rx_dropped;
1881         stats->tx_dropped       = tx_dropped;
1882         stats->rx_nohandler     = rx_nohandler;
1883         return stats;
1884 }
1885
1886 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1887 {
1888         struct team *team = netdev_priv(dev);
1889         struct team_port *port;
1890         int err;
1891
1892         /*
1893          * Alhough this is reader, it's guarded by team lock. It's not possible
1894          * to traverse list in reverse under rcu_read_lock
1895          */
1896         mutex_lock(&team->lock);
1897         list_for_each_entry(port, &team->port_list, list) {
1898                 err = vlan_vid_add(port->dev, proto, vid);
1899                 if (err)
1900                         goto unwind;
1901         }
1902         mutex_unlock(&team->lock);
1903
1904         return 0;
1905
1906 unwind:
1907         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1908                 vlan_vid_del(port->dev, proto, vid);
1909         mutex_unlock(&team->lock);
1910
1911         return err;
1912 }
1913
1914 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1915 {
1916         struct team *team = netdev_priv(dev);
1917         struct team_port *port;
1918
1919         mutex_lock(&team->lock);
1920         list_for_each_entry(port, &team->port_list, list)
1921                 vlan_vid_del(port->dev, proto, vid);
1922         mutex_unlock(&team->lock);
1923
1924         return 0;
1925 }
1926
1927 #ifdef CONFIG_NET_POLL_CONTROLLER
1928 static void team_poll_controller(struct net_device *dev)
1929 {
1930 }
1931
1932 static void __team_netpoll_cleanup(struct team *team)
1933 {
1934         struct team_port *port;
1935
1936         list_for_each_entry(port, &team->port_list, list)
1937                 team_port_disable_netpoll(port);
1938 }
1939
1940 static void team_netpoll_cleanup(struct net_device *dev)
1941 {
1942         struct team *team = netdev_priv(dev);
1943
1944         mutex_lock(&team->lock);
1945         __team_netpoll_cleanup(team);
1946         mutex_unlock(&team->lock);
1947 }
1948
1949 static int team_netpoll_setup(struct net_device *dev,
1950                               struct netpoll_info *npifo)
1951 {
1952         struct team *team = netdev_priv(dev);
1953         struct team_port *port;
1954         int err = 0;
1955
1956         mutex_lock(&team->lock);
1957         list_for_each_entry(port, &team->port_list, list) {
1958                 err = __team_port_enable_netpoll(port);
1959                 if (err) {
1960                         __team_netpoll_cleanup(team);
1961                         break;
1962                 }
1963         }
1964         mutex_unlock(&team->lock);
1965         return err;
1966 }
1967 #endif
1968
1969 static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
1970 {
1971         struct team *team = netdev_priv(dev);
1972         int err;
1973
1974         mutex_lock(&team->lock);
1975         err = team_port_add(team, port_dev);
1976         mutex_unlock(&team->lock);
1977         return err;
1978 }
1979
1980 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1981 {
1982         struct team *team = netdev_priv(dev);
1983         int err;
1984
1985         mutex_lock(&team->lock);
1986         err = team_port_del(team, port_dev);
1987         mutex_unlock(&team->lock);
1988         return err;
1989 }
1990
1991 static netdev_features_t team_fix_features(struct net_device *dev,
1992                                            netdev_features_t features)
1993 {
1994         struct team_port *port;
1995         struct team *team = netdev_priv(dev);
1996         netdev_features_t mask;
1997
1998         mask = features;
1999         features &= ~NETIF_F_ONE_FOR_ALL;
2000         features |= NETIF_F_ALL_FOR_ALL;
2001
2002         rcu_read_lock();
2003         list_for_each_entry_rcu(port, &team->port_list, list) {
2004                 features = netdev_increment_features(features,
2005                                                      port->dev->features,
2006                                                      mask);
2007         }
2008         rcu_read_unlock();
2009
2010         features = netdev_add_tso_features(features, mask);
2011
2012         return features;
2013 }
2014
2015 static int team_change_carrier(struct net_device *dev, bool new_carrier)
2016 {
2017         struct team *team = netdev_priv(dev);
2018
2019         team->user_carrier_enabled = true;
2020
2021         if (new_carrier)
2022                 netif_carrier_on(dev);
2023         else
2024                 netif_carrier_off(dev);
2025         return 0;
2026 }
2027
2028 static const struct net_device_ops team_netdev_ops = {
2029         .ndo_init               = team_init,
2030         .ndo_uninit             = team_uninit,
2031         .ndo_open               = team_open,
2032         .ndo_stop               = team_close,
2033         .ndo_start_xmit         = team_xmit,
2034         .ndo_select_queue       = team_select_queue,
2035         .ndo_change_rx_flags    = team_change_rx_flags,
2036         .ndo_set_rx_mode        = team_set_rx_mode,
2037         .ndo_set_mac_address    = team_set_mac_address,
2038         .ndo_change_mtu         = team_change_mtu,
2039         .ndo_get_stats64        = team_get_stats64,
2040         .ndo_vlan_rx_add_vid    = team_vlan_rx_add_vid,
2041         .ndo_vlan_rx_kill_vid   = team_vlan_rx_kill_vid,
2042 #ifdef CONFIG_NET_POLL_CONTROLLER
2043         .ndo_poll_controller    = team_poll_controller,
2044         .ndo_netpoll_setup      = team_netpoll_setup,
2045         .ndo_netpoll_cleanup    = team_netpoll_cleanup,
2046 #endif
2047         .ndo_add_slave          = team_add_slave,
2048         .ndo_del_slave          = team_del_slave,
2049         .ndo_fix_features       = team_fix_features,
2050         .ndo_neigh_construct    = netdev_default_l2upper_neigh_construct,
2051         .ndo_neigh_destroy      = netdev_default_l2upper_neigh_destroy,
2052         .ndo_change_carrier     = team_change_carrier,
2053         .ndo_bridge_setlink     = switchdev_port_bridge_setlink,
2054         .ndo_bridge_getlink     = switchdev_port_bridge_getlink,
2055         .ndo_bridge_dellink     = switchdev_port_bridge_dellink,
2056         .ndo_fdb_add            = switchdev_port_fdb_add,
2057         .ndo_fdb_del            = switchdev_port_fdb_del,
2058         .ndo_fdb_dump           = switchdev_port_fdb_dump,
2059         .ndo_features_check     = passthru_features_check,
2060 };
2061
2062 /***********************
2063  * ethtool interface
2064  ***********************/
2065
2066 static void team_ethtool_get_drvinfo(struct net_device *dev,
2067                                      struct ethtool_drvinfo *drvinfo)
2068 {
2069         strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
2070         strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2071 }
2072
2073 static const struct ethtool_ops team_ethtool_ops = {
2074         .get_drvinfo            = team_ethtool_get_drvinfo,
2075         .get_link               = ethtool_op_get_link,
2076 };
2077
2078 /***********************
2079  * rt netlink interface
2080  ***********************/
2081
2082 static void team_setup_by_port(struct net_device *dev,
2083                                struct net_device *port_dev)
2084 {
2085         dev->header_ops = port_dev->header_ops;
2086         dev->type = port_dev->type;
2087         dev->hard_header_len = port_dev->hard_header_len;
2088         dev->needed_headroom = port_dev->needed_headroom;
2089         dev->addr_len = port_dev->addr_len;
2090         dev->mtu = port_dev->mtu;
2091         memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2092         eth_hw_addr_inherit(dev, port_dev);
2093 }
2094
2095 static int team_dev_type_check_change(struct net_device *dev,
2096                                       struct net_device *port_dev)
2097 {
2098         struct team *team = netdev_priv(dev);
2099         char *portname = port_dev->name;
2100         int err;
2101
2102         if (dev->type == port_dev->type)
2103                 return 0;
2104         if (!list_empty(&team->port_list)) {
2105                 netdev_err(dev, "Device %s is of different type\n", portname);
2106                 return -EBUSY;
2107         }
2108         err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2109         err = notifier_to_errno(err);
2110         if (err) {
2111                 netdev_err(dev, "Refused to change device type\n");
2112                 return err;
2113         }
2114         dev_uc_flush(dev);
2115         dev_mc_flush(dev);
2116         team_setup_by_port(dev, port_dev);
2117         call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2118         return 0;
2119 }
2120
2121 static void team_setup(struct net_device *dev)
2122 {
2123         ether_setup(dev);
2124
2125         dev->netdev_ops = &team_netdev_ops;
2126         dev->ethtool_ops = &team_ethtool_ops;
2127         dev->destructor = team_destructor;
2128         dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2129         dev->priv_flags |= IFF_NO_QUEUE;
2130         dev->priv_flags |= IFF_TEAM;
2131
2132         /*
2133          * Indicate we support unicast address filtering. That way core won't
2134          * bring us to promisc mode in case a unicast addr is added.
2135          * Let this up to underlay drivers.
2136          */
2137         dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2138
2139         dev->features |= NETIF_F_LLTX;
2140         dev->features |= NETIF_F_GRO;
2141
2142         /* Don't allow team devices to change network namespaces. */
2143         dev->features |= NETIF_F_NETNS_LOCAL;
2144
2145         dev->hw_features = TEAM_VLAN_FEATURES |
2146                            NETIF_F_HW_VLAN_CTAG_RX |
2147                            NETIF_F_HW_VLAN_CTAG_FILTER;
2148
2149         dev->hw_features |= NETIF_F_GSO_ENCAP_ALL;
2150         dev->features |= dev->hw_features;
2151         dev->features |= NETIF_F_HW_VLAN_CTAG_TX;
2152 }
2153
2154 static int team_newlink(struct net *src_net, struct net_device *dev,
2155                         struct nlattr *tb[], struct nlattr *data[])
2156 {
2157         if (tb[IFLA_ADDRESS] == NULL)
2158                 eth_hw_addr_random(dev);
2159
2160         return register_netdevice(dev);
2161 }
2162
2163 static int team_validate(struct nlattr *tb[], struct nlattr *data[])
2164 {
2165         if (tb[IFLA_ADDRESS]) {
2166                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2167                         return -EINVAL;
2168                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2169                         return -EADDRNOTAVAIL;
2170         }
2171         return 0;
2172 }
2173
2174 static unsigned int team_get_num_tx_queues(void)
2175 {
2176         return TEAM_DEFAULT_NUM_TX_QUEUES;
2177 }
2178
2179 static unsigned int team_get_num_rx_queues(void)
2180 {
2181         return TEAM_DEFAULT_NUM_RX_QUEUES;
2182 }
2183
2184 static struct rtnl_link_ops team_link_ops __read_mostly = {
2185         .kind                   = DRV_NAME,
2186         .priv_size              = sizeof(struct team),
2187         .setup                  = team_setup,
2188         .newlink                = team_newlink,
2189         .validate               = team_validate,
2190         .get_num_tx_queues      = team_get_num_tx_queues,
2191         .get_num_rx_queues      = team_get_num_rx_queues,
2192 };
2193
2194
2195 /***********************************
2196  * Generic netlink custom interface
2197  ***********************************/
2198
2199 static struct genl_family team_nl_family = {
2200         .id             = GENL_ID_GENERATE,
2201         .name           = TEAM_GENL_NAME,
2202         .version        = TEAM_GENL_VERSION,
2203         .maxattr        = TEAM_ATTR_MAX,
2204         .netnsok        = true,
2205 };
2206
2207 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2208         [TEAM_ATTR_UNSPEC]                      = { .type = NLA_UNSPEC, },
2209         [TEAM_ATTR_TEAM_IFINDEX]                = { .type = NLA_U32 },
2210         [TEAM_ATTR_LIST_OPTION]                 = { .type = NLA_NESTED },
2211         [TEAM_ATTR_LIST_PORT]                   = { .type = NLA_NESTED },
2212 };
2213
2214 static const struct nla_policy
2215 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2216         [TEAM_ATTR_OPTION_UNSPEC]               = { .type = NLA_UNSPEC, },
2217         [TEAM_ATTR_OPTION_NAME] = {
2218                 .type = NLA_STRING,
2219                 .len = TEAM_STRING_MAX_LEN,
2220         },
2221         [TEAM_ATTR_OPTION_CHANGED]              = { .type = NLA_FLAG },
2222         [TEAM_ATTR_OPTION_TYPE]                 = { .type = NLA_U8 },
2223         [TEAM_ATTR_OPTION_DATA]                 = { .type = NLA_BINARY },
2224         [TEAM_ATTR_OPTION_PORT_IFINDEX]         = { .type = NLA_U32 },
2225         [TEAM_ATTR_OPTION_ARRAY_INDEX]          = { .type = NLA_U32 },
2226 };
2227
2228 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2229 {
2230         struct sk_buff *msg;
2231         void *hdr;
2232         int err;
2233
2234         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2235         if (!msg)
2236                 return -ENOMEM;
2237
2238         hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2239                           &team_nl_family, 0, TEAM_CMD_NOOP);
2240         if (!hdr) {
2241                 err = -EMSGSIZE;
2242                 goto err_msg_put;
2243         }
2244
2245         genlmsg_end(msg, hdr);
2246
2247         return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2248
2249 err_msg_put:
2250         nlmsg_free(msg);
2251
2252         return err;
2253 }
2254
2255 /*
2256  * Netlink cmd functions should be locked by following two functions.
2257  * Since dev gets held here, that ensures dev won't disappear in between.
2258  */
2259 static struct team *team_nl_team_get(struct genl_info *info)
2260 {
2261         struct net *net = genl_info_net(info);
2262         int ifindex;
2263         struct net_device *dev;
2264         struct team *team;
2265
2266         if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2267                 return NULL;
2268
2269         ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2270         dev = dev_get_by_index(net, ifindex);
2271         if (!dev || dev->netdev_ops != &team_netdev_ops) {
2272                 if (dev)
2273                         dev_put(dev);
2274                 return NULL;
2275         }
2276
2277         team = netdev_priv(dev);
2278         mutex_lock(&team->lock);
2279         return team;
2280 }
2281
2282 static void team_nl_team_put(struct team *team)
2283 {
2284         mutex_unlock(&team->lock);
2285         dev_put(team->dev);
2286 }
2287
2288 typedef int team_nl_send_func_t(struct sk_buff *skb,
2289                                 struct team *team, u32 portid);
2290
2291 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2292 {
2293         return genlmsg_unicast(dev_net(team->dev), skb, portid);
2294 }
2295
2296 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2297                                        struct team_option_inst *opt_inst)
2298 {
2299         struct nlattr *option_item;
2300         struct team_option *option = opt_inst->option;
2301         struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2302         struct team_gsetter_ctx ctx;
2303         int err;
2304
2305         ctx.info = opt_inst_info;
2306         err = team_option_get(team, opt_inst, &ctx);
2307         if (err)
2308                 return err;
2309
2310         option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
2311         if (!option_item)
2312                 return -EMSGSIZE;
2313
2314         if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2315                 goto nest_cancel;
2316         if (opt_inst_info->port &&
2317             nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2318                         opt_inst_info->port->dev->ifindex))
2319                 goto nest_cancel;
2320         if (opt_inst->option->array_size &&
2321             nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2322                         opt_inst_info->array_index))
2323                 goto nest_cancel;
2324
2325         switch (option->type) {
2326         case TEAM_OPTION_TYPE_U32:
2327                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2328                         goto nest_cancel;
2329                 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2330                         goto nest_cancel;
2331                 break;
2332         case TEAM_OPTION_TYPE_STRING:
2333                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2334                         goto nest_cancel;
2335                 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2336                                    ctx.data.str_val))
2337                         goto nest_cancel;
2338                 break;
2339         case TEAM_OPTION_TYPE_BINARY:
2340                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2341                         goto nest_cancel;
2342                 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2343                             ctx.data.bin_val.ptr))
2344                         goto nest_cancel;
2345                 break;
2346         case TEAM_OPTION_TYPE_BOOL:
2347                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2348                         goto nest_cancel;
2349                 if (ctx.data.bool_val &&
2350                     nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2351                         goto nest_cancel;
2352                 break;
2353         case TEAM_OPTION_TYPE_S32:
2354                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2355                         goto nest_cancel;
2356                 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2357                         goto nest_cancel;
2358                 break;
2359         default:
2360                 BUG();
2361         }
2362         if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2363                 goto nest_cancel;
2364         if (opt_inst->changed) {
2365                 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2366                         goto nest_cancel;
2367                 opt_inst->changed = false;
2368         }
2369         nla_nest_end(skb, option_item);
2370         return 0;
2371
2372 nest_cancel:
2373         nla_nest_cancel(skb, option_item);
2374         return -EMSGSIZE;
2375 }
2376
2377 static int __send_and_alloc_skb(struct sk_buff **pskb,
2378                                 struct team *team, u32 portid,
2379                                 team_nl_send_func_t *send_func)
2380 {
2381         int err;
2382
2383         if (*pskb) {
2384                 err = send_func(*pskb, team, portid);
2385                 if (err)
2386                         return err;
2387         }
2388         *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2389         if (!*pskb)
2390                 return -ENOMEM;
2391         return 0;
2392 }
2393
2394 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2395                                     int flags, team_nl_send_func_t *send_func,
2396                                     struct list_head *sel_opt_inst_list)
2397 {
2398         struct nlattr *option_list;
2399         struct nlmsghdr *nlh;
2400         void *hdr;
2401         struct team_option_inst *opt_inst;
2402         int err;
2403         struct sk_buff *skb = NULL;
2404         bool incomplete;
2405         int i;
2406
2407         opt_inst = list_first_entry(sel_opt_inst_list,
2408                                     struct team_option_inst, tmp_list);
2409
2410 start_again:
2411         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2412         if (err)
2413                 return err;
2414
2415         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2416                           TEAM_CMD_OPTIONS_GET);
2417         if (!hdr) {
2418                 nlmsg_free(skb);
2419                 return -EMSGSIZE;
2420         }
2421
2422         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2423                 goto nla_put_failure;
2424         option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2425         if (!option_list)
2426                 goto nla_put_failure;
2427
2428         i = 0;
2429         incomplete = false;
2430         list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2431                 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2432                 if (err) {
2433                         if (err == -EMSGSIZE) {
2434                                 if (!i)
2435                                         goto errout;
2436                                 incomplete = true;
2437                                 break;
2438                         }
2439                         goto errout;
2440                 }
2441                 i++;
2442         }
2443
2444         nla_nest_end(skb, option_list);
2445         genlmsg_end(skb, hdr);
2446         if (incomplete)
2447                 goto start_again;
2448
2449 send_done:
2450         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2451         if (!nlh) {
2452                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2453                 if (err)
2454                         return err;
2455                 goto send_done;
2456         }
2457
2458         return send_func(skb, team, portid);
2459
2460 nla_put_failure:
2461         err = -EMSGSIZE;
2462 errout:
2463         genlmsg_cancel(skb, hdr);
2464         nlmsg_free(skb);
2465         return err;
2466 }
2467
2468 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2469 {
2470         struct team *team;
2471         struct team_option_inst *opt_inst;
2472         int err;
2473         LIST_HEAD(sel_opt_inst_list);
2474
2475         team = team_nl_team_get(info);
2476         if (!team)
2477                 return -EINVAL;
2478
2479         list_for_each_entry(opt_inst, &team->option_inst_list, list)
2480                 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2481         err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2482                                        NLM_F_ACK, team_nl_send_unicast,
2483                                        &sel_opt_inst_list);
2484
2485         team_nl_team_put(team);
2486
2487         return err;
2488 }
2489
2490 static int team_nl_send_event_options_get(struct team *team,
2491                                           struct list_head *sel_opt_inst_list);
2492
2493 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2494 {
2495         struct team *team;
2496         int err = 0;
2497         int i;
2498         struct nlattr *nl_option;
2499
2500         rtnl_lock();
2501
2502         team = team_nl_team_get(info);
2503         if (!team) {
2504                 err = -EINVAL;
2505                 goto rtnl_unlock;
2506         }
2507
2508         err = -EINVAL;
2509         if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2510                 err = -EINVAL;
2511                 goto team_put;
2512         }
2513
2514         nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2515                 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2516                 struct nlattr *attr;
2517                 struct nlattr *attr_data;
2518                 LIST_HEAD(opt_inst_list);
2519                 enum team_option_type opt_type;
2520                 int opt_port_ifindex = 0; /* != 0 for per-port options */
2521                 u32 opt_array_index = 0;
2522                 bool opt_is_array = false;
2523                 struct team_option_inst *opt_inst;
2524                 char *opt_name;
2525                 bool opt_found = false;
2526
2527                 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2528                         err = -EINVAL;
2529                         goto team_put;
2530                 }
2531                 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2532                                        nl_option, team_nl_option_policy);
2533                 if (err)
2534                         goto team_put;
2535                 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2536                     !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2537                         err = -EINVAL;
2538                         goto team_put;
2539                 }
2540                 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2541                 case NLA_U32:
2542                         opt_type = TEAM_OPTION_TYPE_U32;
2543                         break;
2544                 case NLA_STRING:
2545                         opt_type = TEAM_OPTION_TYPE_STRING;
2546                         break;
2547                 case NLA_BINARY:
2548                         opt_type = TEAM_OPTION_TYPE_BINARY;
2549                         break;
2550                 case NLA_FLAG:
2551                         opt_type = TEAM_OPTION_TYPE_BOOL;
2552                         break;
2553                 case NLA_S32:
2554                         opt_type = TEAM_OPTION_TYPE_S32;
2555                         break;
2556                 default:
2557                         goto team_put;
2558                 }
2559
2560                 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2561                 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2562                         err = -EINVAL;
2563                         goto team_put;
2564                 }
2565
2566                 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2567                 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2568                 if (attr)
2569                         opt_port_ifindex = nla_get_u32(attr);
2570
2571                 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2572                 if (attr) {
2573                         opt_is_array = true;
2574                         opt_array_index = nla_get_u32(attr);
2575                 }
2576
2577                 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2578                         struct team_option *option = opt_inst->option;
2579                         struct team_gsetter_ctx ctx;
2580                         struct team_option_inst_info *opt_inst_info;
2581                         int tmp_ifindex;
2582
2583                         opt_inst_info = &opt_inst->info;
2584                         tmp_ifindex = opt_inst_info->port ?
2585                                       opt_inst_info->port->dev->ifindex : 0;
2586                         if (option->type != opt_type ||
2587                             strcmp(option->name, opt_name) ||
2588                             tmp_ifindex != opt_port_ifindex ||
2589                             (option->array_size && !opt_is_array) ||
2590                             opt_inst_info->array_index != opt_array_index)
2591                                 continue;
2592                         opt_found = true;
2593                         ctx.info = opt_inst_info;
2594                         switch (opt_type) {
2595                         case TEAM_OPTION_TYPE_U32:
2596                                 ctx.data.u32_val = nla_get_u32(attr_data);
2597                                 break;
2598                         case TEAM_OPTION_TYPE_STRING:
2599                                 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2600                                         err = -EINVAL;
2601                                         goto team_put;
2602                                 }
2603                                 ctx.data.str_val = nla_data(attr_data);
2604                                 break;
2605                         case TEAM_OPTION_TYPE_BINARY:
2606                                 ctx.data.bin_val.len = nla_len(attr_data);
2607                                 ctx.data.bin_val.ptr = nla_data(attr_data);
2608                                 break;
2609                         case TEAM_OPTION_TYPE_BOOL:
2610                                 ctx.data.bool_val = attr_data ? true : false;
2611                                 break;
2612                         case TEAM_OPTION_TYPE_S32:
2613                                 ctx.data.s32_val = nla_get_s32(attr_data);
2614                                 break;
2615                         default:
2616                                 BUG();
2617                         }
2618                         err = team_option_set(team, opt_inst, &ctx);
2619                         if (err)
2620                                 goto team_put;
2621                         opt_inst->changed = true;
2622                         list_add(&opt_inst->tmp_list, &opt_inst_list);
2623                 }
2624                 if (!opt_found) {
2625                         err = -ENOENT;
2626                         goto team_put;
2627                 }
2628
2629                 err = team_nl_send_event_options_get(team, &opt_inst_list);
2630                 if (err)
2631                         break;
2632         }
2633
2634 team_put:
2635         team_nl_team_put(team);
2636 rtnl_unlock:
2637         rtnl_unlock();
2638         return err;
2639 }
2640
2641 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2642                                      struct team_port *port)
2643 {
2644         struct nlattr *port_item;
2645
2646         port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2647         if (!port_item)
2648                 goto nest_cancel;
2649         if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2650                 goto nest_cancel;
2651         if (port->changed) {
2652                 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2653                         goto nest_cancel;
2654                 port->changed = false;
2655         }
2656         if ((port->removed &&
2657              nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2658             (port->state.linkup &&
2659              nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2660             nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2661             nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2662                 goto nest_cancel;
2663         nla_nest_end(skb, port_item);
2664         return 0;
2665
2666 nest_cancel:
2667         nla_nest_cancel(skb, port_item);
2668         return -EMSGSIZE;
2669 }
2670
2671 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2672                                       int flags, team_nl_send_func_t *send_func,
2673                                       struct team_port *one_port)
2674 {
2675         struct nlattr *port_list;
2676         struct nlmsghdr *nlh;
2677         void *hdr;
2678         struct team_port *port;
2679         int err;
2680         struct sk_buff *skb = NULL;
2681         bool incomplete;
2682         int i;
2683
2684         port = list_first_entry_or_null(&team->port_list,
2685                                         struct team_port, list);
2686
2687 start_again:
2688         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2689         if (err)
2690                 return err;
2691
2692         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2693                           TEAM_CMD_PORT_LIST_GET);
2694         if (!hdr) {
2695                 nlmsg_free(skb);
2696                 return -EMSGSIZE;
2697         }
2698
2699         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2700                 goto nla_put_failure;
2701         port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2702         if (!port_list)
2703                 goto nla_put_failure;
2704
2705         i = 0;
2706         incomplete = false;
2707
2708         /* If one port is selected, called wants to send port list containing
2709          * only this port. Otherwise go through all listed ports and send all
2710          */
2711         if (one_port) {
2712                 err = team_nl_fill_one_port_get(skb, one_port);
2713                 if (err)
2714                         goto errout;
2715         } else if (port) {
2716                 list_for_each_entry_from(port, &team->port_list, list) {
2717                         err = team_nl_fill_one_port_get(skb, port);
2718                         if (err) {
2719                                 if (err == -EMSGSIZE) {
2720                                         if (!i)
2721                                                 goto errout;
2722                                         incomplete = true;
2723                                         break;
2724                                 }
2725                                 goto errout;
2726                         }
2727                         i++;
2728                 }
2729         }
2730
2731         nla_nest_end(skb, port_list);
2732         genlmsg_end(skb, hdr);
2733         if (incomplete)
2734                 goto start_again;
2735
2736 send_done:
2737         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2738         if (!nlh) {
2739                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2740                 if (err)
2741                         return err;
2742                 goto send_done;
2743         }
2744
2745         return send_func(skb, team, portid);
2746
2747 nla_put_failure:
2748         err = -EMSGSIZE;
2749 errout:
2750         genlmsg_cancel(skb, hdr);
2751         nlmsg_free(skb);
2752         return err;
2753 }
2754
2755 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2756                                      struct genl_info *info)
2757 {
2758         struct team *team;
2759         int err;
2760
2761         team = team_nl_team_get(info);
2762         if (!team)
2763                 return -EINVAL;
2764
2765         err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2766                                          NLM_F_ACK, team_nl_send_unicast, NULL);
2767
2768         team_nl_team_put(team);
2769
2770         return err;
2771 }
2772
2773 static const struct genl_ops team_nl_ops[] = {
2774         {
2775                 .cmd = TEAM_CMD_NOOP,
2776                 .doit = team_nl_cmd_noop,
2777                 .policy = team_nl_policy,
2778         },
2779         {
2780                 .cmd = TEAM_CMD_OPTIONS_SET,
2781                 .doit = team_nl_cmd_options_set,
2782                 .policy = team_nl_policy,
2783                 .flags = GENL_ADMIN_PERM,
2784         },
2785         {
2786                 .cmd = TEAM_CMD_OPTIONS_GET,
2787                 .doit = team_nl_cmd_options_get,
2788                 .policy = team_nl_policy,
2789                 .flags = GENL_ADMIN_PERM,
2790         },
2791         {
2792                 .cmd = TEAM_CMD_PORT_LIST_GET,
2793                 .doit = team_nl_cmd_port_list_get,
2794                 .policy = team_nl_policy,
2795                 .flags = GENL_ADMIN_PERM,
2796         },
2797 };
2798
2799 static const struct genl_multicast_group team_nl_mcgrps[] = {
2800         { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2801 };
2802
2803 static int team_nl_send_multicast(struct sk_buff *skb,
2804                                   struct team *team, u32 portid)
2805 {
2806         return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2807                                        skb, 0, 0, GFP_KERNEL);
2808 }
2809
2810 static int team_nl_send_event_options_get(struct team *team,
2811                                           struct list_head *sel_opt_inst_list)
2812 {
2813         return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2814                                         sel_opt_inst_list);
2815 }
2816
2817 static int team_nl_send_event_port_get(struct team *team,
2818                                        struct team_port *port)
2819 {
2820         return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2821                                           port);
2822 }
2823
2824 static int team_nl_init(void)
2825 {
2826         return genl_register_family_with_ops_groups(&team_nl_family, team_nl_ops,
2827                                                     team_nl_mcgrps);
2828 }
2829
2830 static void team_nl_fini(void)
2831 {
2832         genl_unregister_family(&team_nl_family);
2833 }
2834
2835
2836 /******************
2837  * Change checkers
2838  ******************/
2839
2840 static void __team_options_change_check(struct team *team)
2841 {
2842         int err;
2843         struct team_option_inst *opt_inst;
2844         LIST_HEAD(sel_opt_inst_list);
2845
2846         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2847                 if (opt_inst->changed)
2848                         list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2849         }
2850         err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2851         if (err && err != -ESRCH)
2852                 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2853                             err);
2854 }
2855
2856 /* rtnl lock is held */
2857
2858 static void __team_port_change_send(struct team_port *port, bool linkup)
2859 {
2860         int err;
2861
2862         port->changed = true;
2863         port->state.linkup = linkup;
2864         team_refresh_port_linkup(port);
2865         if (linkup) {
2866                 struct ethtool_link_ksettings ecmd;
2867
2868                 err = __ethtool_get_link_ksettings(port->dev, &ecmd);
2869                 if (!err) {
2870                         port->state.speed = ecmd.base.speed;
2871                         port->state.duplex = ecmd.base.duplex;
2872                         goto send_event;
2873                 }
2874         }
2875         port->state.speed = 0;
2876         port->state.duplex = 0;
2877
2878 send_event:
2879         err = team_nl_send_event_port_get(port->team, port);
2880         if (err && err != -ESRCH)
2881                 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2882                             port->dev->name, err);
2883
2884 }
2885
2886 static void __team_carrier_check(struct team *team)
2887 {
2888         struct team_port *port;
2889         bool team_linkup;
2890
2891         if (team->user_carrier_enabled)
2892                 return;
2893
2894         team_linkup = false;
2895         list_for_each_entry(port, &team->port_list, list) {
2896                 if (port->linkup) {
2897                         team_linkup = true;
2898                         break;
2899                 }
2900         }
2901
2902         if (team_linkup)
2903                 netif_carrier_on(team->dev);
2904         else
2905                 netif_carrier_off(team->dev);
2906 }
2907
2908 static void __team_port_change_check(struct team_port *port, bool linkup)
2909 {
2910         if (port->state.linkup != linkup)
2911                 __team_port_change_send(port, linkup);
2912         __team_carrier_check(port->team);
2913 }
2914
2915 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2916 {
2917         __team_port_change_send(port, linkup);
2918         __team_carrier_check(port->team);
2919 }
2920
2921 static void __team_port_change_port_removed(struct team_port *port)
2922 {
2923         port->removed = true;
2924         __team_port_change_send(port, false);
2925         __team_carrier_check(port->team);
2926 }
2927
2928 static void team_port_change_check(struct team_port *port, bool linkup)
2929 {
2930         struct team *team = port->team;
2931
2932         mutex_lock(&team->lock);
2933         __team_port_change_check(port, linkup);
2934         mutex_unlock(&team->lock);
2935 }
2936
2937
2938 /************************************
2939  * Net device notifier event handler
2940  ************************************/
2941
2942 static int team_device_event(struct notifier_block *unused,
2943                              unsigned long event, void *ptr)
2944 {
2945         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2946         struct team_port *port;
2947
2948         port = team_port_get_rtnl(dev);
2949         if (!port)
2950                 return NOTIFY_DONE;
2951
2952         switch (event) {
2953         case NETDEV_UP:
2954                 if (netif_carrier_ok(dev))
2955                         team_port_change_check(port, true);
2956                 break;
2957         case NETDEV_DOWN:
2958                 team_port_change_check(port, false);
2959                 break;
2960         case NETDEV_CHANGE:
2961                 if (netif_running(port->dev))
2962                         team_port_change_check(port,
2963                                                !!netif_carrier_ok(port->dev));
2964                 break;
2965         case NETDEV_UNREGISTER:
2966                 team_del_slave(port->team->dev, dev);
2967                 break;
2968         case NETDEV_FEAT_CHANGE:
2969                 team_compute_features(port->team);
2970                 break;
2971         case NETDEV_PRECHANGEMTU:
2972                 /* Forbid to change mtu of underlaying device */
2973                 if (!port->team->port_mtu_change_allowed)
2974                         return NOTIFY_BAD;
2975                 break;
2976         case NETDEV_PRE_TYPE_CHANGE:
2977                 /* Forbid to change type of underlaying device */
2978                 return NOTIFY_BAD;
2979         case NETDEV_RESEND_IGMP:
2980                 /* Propagate to master device */
2981                 call_netdevice_notifiers(event, port->team->dev);
2982                 break;
2983         }
2984         return NOTIFY_DONE;
2985 }
2986
2987 static struct notifier_block team_notifier_block __read_mostly = {
2988         .notifier_call = team_device_event,
2989 };
2990
2991
2992 /***********************
2993  * Module init and exit
2994  ***********************/
2995
2996 static int __init team_module_init(void)
2997 {
2998         int err;
2999
3000         register_netdevice_notifier(&team_notifier_block);
3001
3002         err = rtnl_link_register(&team_link_ops);
3003         if (err)
3004                 goto err_rtnl_reg;
3005
3006         err = team_nl_init();
3007         if (err)
3008                 goto err_nl_init;
3009
3010         return 0;
3011
3012 err_nl_init:
3013         rtnl_link_unregister(&team_link_ops);
3014
3015 err_rtnl_reg:
3016         unregister_netdevice_notifier(&team_notifier_block);
3017
3018         return err;
3019 }
3020
3021 static void __exit team_module_exit(void)
3022 {
3023         team_nl_fini();
3024         rtnl_link_unregister(&team_link_ops);
3025         unregister_netdevice_notifier(&team_notifier_block);
3026 }
3027
3028 module_init(team_module_init);
3029 module_exit(team_module_exit);
3030
3031 MODULE_LICENSE("GPL v2");
3032 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
3033 MODULE_DESCRIPTION("Ethernet team device driver");
3034 MODULE_ALIAS_RTNL_LINK(DRV_NAME);