drivers/net/team/team.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * drivers/net/team/team.c - Network team device driver
   4  * Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com>
   5  */
   6
   7 #include <linux/ethtool.h>
   8 #include <linux/kernel.h>
   9 #include <linux/types.h>
  10 #include <linux/module.h>
  11 #include <linux/init.h>
  12 #include <linux/slab.h>
  13 #include <linux/rcupdate.h>
  14 #include <linux/errno.h>
  15 #include <linux/ctype.h>
  16 #include <linux/notifier.h>
  17 #include <linux/netdevice.h>
  18 #include <linux/netpoll.h>
  19 #include <linux/if_vlan.h>
  20 #include <linux/if_arp.h>
  21 #include <linux/socket.h>
  22 #include <linux/etherdevice.h>
  23 #include <linux/rtnetlink.h>
  24 #include <net/rtnetlink.h>
  25 #include <net/genetlink.h>
  26 #include <net/netlink.h>
  27 #include <net/sch_generic.h>
  28 #include <generated/utsrelease.h>
  29 #include <linux/if_team.h>
  30
  31 #define DRV_NAME "team"
  32
  33
  34 /**********
  35  * Helpers
  36  **********/
  37
  38 static struct team_port *team_port_get_rtnl(const struct net_device *dev)
  39 {
  40         struct team_port *port = rtnl_dereference(dev->rx_handler_data);
  41
  42         return netif_is_team_port(dev) ? port : NULL;
  43 }
  44
  45 /*
  46  * Since the ability to change device address for open port device is tested in
  47  * team_port_add, this function can be called without control of return value
  48  */
  49 static int __set_port_dev_addr(struct net_device *port_dev,
  50                                const unsigned char *dev_addr)
  51 {
  52         struct sockaddr_storage addr;
  53
  54         memcpy(addr.__data, dev_addr, port_dev->addr_len);
  55         addr.ss_family = port_dev->type;
  56         return dev_set_mac_address(port_dev, (struct sockaddr *)&addr, NULL);
  57 }
  58
  59 static int team_port_set_orig_dev_addr(struct team_port *port)
  60 {
  61         return __set_port_dev_addr(port->dev, port->orig.dev_addr);
  62 }
  63
  64 static int team_port_set_team_dev_addr(struct team *team,
  65                                        struct team_port *port)
  66 {
  67         return __set_port_dev_addr(port->dev, team->dev->dev_addr);
  68 }
  69
  70 int team_modeop_port_enter(struct team *team, struct team_port *port)
  71 {
  72         return team_port_set_team_dev_addr(team, port);
  73 }
  74 EXPORT_SYMBOL(team_modeop_port_enter);
  75
  76 void team_modeop_port_change_dev_addr(struct team *team,
  77                                       struct team_port *port)
  78 {
  79         team_port_set_team_dev_addr(team, port);
  80 }
  81 EXPORT_SYMBOL(team_modeop_port_change_dev_addr);
  82
  83 static void team_lower_state_changed(struct team_port *port)
  84 {
  85         struct netdev_lag_lower_state_info info;
  86
  87         info.link_up = port->linkup;
  88         info.tx_enabled = team_port_enabled(port);
  89         netdev_lower_state_changed(port->dev, &info);
  90 }
  91
  92 static void team_refresh_port_linkup(struct team_port *port)
  93 {
  94         bool new_linkup = port->user.linkup_enabled ? port->user.linkup :
  95                                                       port->state.linkup;
  96
  97         if (port->linkup != new_linkup) {
  98                 port->linkup = new_linkup;
  99                 team_lower_state_changed(port);
 100         }
 101 }
 102
 103
 104 /*******************
 105  * Options handling
 106  *******************/
 107
 108 struct team_option_inst { /* One for each option instance */
 109         struct list_head list;
 110         struct list_head tmp_list;
 111         struct team_option *option;
 112         struct team_option_inst_info info;
 113         bool changed;
 114         bool removed;
 115 };
 116
 117 static struct team_option *__team_find_option(struct team *team,
 118                                               const char *opt_name)
 119 {
 120         struct team_option *option;
 121
 122         list_for_each_entry(option, &team->option_list, list) {
 123                 if (strcmp(option->name, opt_name) == 0)
 124                         return option;
 125         }
 126         return NULL;
 127 }
 128
 129 static void __team_option_inst_del(struct team_option_inst *opt_inst)
 130 {
 131         list_del(&opt_inst->list);
 132         kfree(opt_inst);
 133 }
 134
 135 static void __team_option_inst_del_option(struct team *team,
 136                                           struct team_option *option)
 137 {
 138         struct team_option_inst *opt_inst, *tmp;
 139
 140         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 141                 if (opt_inst->option == option)
 142                         __team_option_inst_del(opt_inst);
 143         }
 144 }
 145
 146 static int __team_option_inst_add(struct team *team, struct team_option *option,
 147                                   struct team_port *port)
 148 {
 149         struct team_option_inst *opt_inst;
 150         unsigned int array_size;
 151         unsigned int i;
 152
 153         array_size = option->array_size;
 154         if (!array_size)
 155                 array_size = 1; /* No array but still need one instance */
 156
 157         for (i = 0; i < array_size; i++) {
 158                 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL);
 159                 if (!opt_inst)
 160                         return -ENOMEM;
 161                 opt_inst->option = option;
 162                 opt_inst->info.port = port;
 163                 opt_inst->info.array_index = i;
 164                 opt_inst->changed = true;
 165                 opt_inst->removed = false;
 166                 list_add_tail(&opt_inst->list, &team->option_inst_list);
 167                 if (option->init)
 168                         option->init(team, &opt_inst->info);
 169
 170         }
 171         return 0;
 172 }
 173
 174 static int __team_option_inst_add_option(struct team *team,
 175                                          struct team_option *option)
 176 {
 177         int err;
 178
 179         if (!option->per_port) {
 180                 err = __team_option_inst_add(team, option, NULL);
 181                 if (err)
 182                         goto inst_del_option;
 183         }
 184         return 0;
 185
 186 inst_del_option:
 187         __team_option_inst_del_option(team, option);
 188         return err;
 189 }
 190
 191 static void __team_option_inst_mark_removed_option(struct team *team,
 192                                                    struct team_option *option)
 193 {
 194         struct team_option_inst *opt_inst;
 195
 196         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 197                 if (opt_inst->option == option) {
 198                         opt_inst->changed = true;
 199                         opt_inst->removed = true;
 200                 }
 201         }
 202 }
 203
 204 static void __team_option_inst_del_port(struct team *team,
 205                                         struct team_port *port)
 206 {
 207         struct team_option_inst *opt_inst, *tmp;
 208
 209         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 210                 if (opt_inst->option->per_port &&
 211                     opt_inst->info.port == port)
 212                         __team_option_inst_del(opt_inst);
 213         }
 214 }
 215
 216 static int __team_option_inst_add_port(struct team *team,
 217                                        struct team_port *port)
 218 {
 219         struct team_option *option;
 220         int err;
 221
 222         list_for_each_entry(option, &team->option_list, list) {
 223                 if (!option->per_port)
 224                         continue;
 225                 err = __team_option_inst_add(team, option, port);
 226                 if (err)
 227                         goto inst_del_port;
 228         }
 229         return 0;
 230
 231 inst_del_port:
 232         __team_option_inst_del_port(team, port);
 233         return err;
 234 }
 235
 236 static void __team_option_inst_mark_removed_port(struct team *team,
 237                                                  struct team_port *port)
 238 {
 239         struct team_option_inst *opt_inst;
 240
 241         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 242                 if (opt_inst->info.port == port) {
 243                         opt_inst->changed = true;
 244                         opt_inst->removed = true;
 245                 }
 246         }
 247 }
 248
 249 static int __team_options_register(struct team *team,
 250                                    const struct team_option *option,
 251                                    size_t option_count)
 252 {
 253         int i;
 254         struct team_option **dst_opts;
 255         int err;
 256
 257         dst_opts = kcalloc(option_count, sizeof(struct team_option *),
 258                            GFP_KERNEL);
 259         if (!dst_opts)
 260                 return -ENOMEM;
 261         for (i = 0; i < option_count; i++, option++) {
 262                 if (__team_find_option(team, option->name)) {
 263                         err = -EEXIST;
 264                         goto alloc_rollback;
 265                 }
 266                 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
 267                 if (!dst_opts[i]) {
 268                         err = -ENOMEM;
 269                         goto alloc_rollback;
 270                 }
 271         }
 272
 273         for (i = 0; i < option_count; i++) {
 274                 err = __team_option_inst_add_option(team, dst_opts[i]);
 275                 if (err)
 276                         goto inst_rollback;
 277                 list_add_tail(&dst_opts[i]->list, &team->option_list);
 278         }
 279
 280         kfree(dst_opts);
 281         return 0;
 282
 283 inst_rollback:
 284         for (i--; i >= 0; i--) {
 285                 __team_option_inst_del_option(team, dst_opts[i]);
 286                 list_del(&dst_opts[i]->list);
 287         }
 288
 289         i = option_count;
 290 alloc_rollback:
 291         for (i--; i >= 0; i--)
 292                 kfree(dst_opts[i]);
 293
 294         kfree(dst_opts);
 295         return err;
 296 }
 297
 298 static void __team_options_mark_removed(struct team *team,
 299                                         const struct team_option *option,
 300                                         size_t option_count)
 301 {
 302         int i;
 303
 304         for (i = 0; i < option_count; i++, option++) {
 305                 struct team_option *del_opt;
 306
 307                 del_opt = __team_find_option(team, option->name);
 308                 if (del_opt)
 309                         __team_option_inst_mark_removed_option(team, del_opt);
 310         }
 311 }
 312
 313 static void __team_options_unregister(struct team *team,
 314                                       const struct team_option *option,
 315                                       size_t option_count)
 316 {
 317         int i;
 318
 319         for (i = 0; i < option_count; i++, option++) {
 320                 struct team_option *del_opt;
 321
 322                 del_opt = __team_find_option(team, option->name);
 323                 if (del_opt) {
 324                         __team_option_inst_del_option(team, del_opt);
 325                         list_del(&del_opt->list);
 326                         kfree(del_opt);
 327                 }
 328         }
 329 }
 330
 331 static void __team_options_change_check(struct team *team);
 332
 333 int team_options_register(struct team *team,
 334                           const struct team_option *option,
 335                           size_t option_count)
 336 {
 337         int err;
 338
 339         err = __team_options_register(team, option, option_count);
 340         if (err)
 341                 return err;
 342         __team_options_change_check(team);
 343         return 0;
 344 }
 345 EXPORT_SYMBOL(team_options_register);
 346
 347 void team_options_unregister(struct team *team,
 348                              const struct team_option *option,
 349                              size_t option_count)
 350 {
 351         __team_options_mark_removed(team, option, option_count);
 352         __team_options_change_check(team);
 353         __team_options_unregister(team, option, option_count);
 354 }
 355 EXPORT_SYMBOL(team_options_unregister);
 356
 357 static int team_option_get(struct team *team,
 358                            struct team_option_inst *opt_inst,
 359                            struct team_gsetter_ctx *ctx)
 360 {
 361         if (!opt_inst->option->getter)
 362                 return -EOPNOTSUPP;
 363
 364         opt_inst->option->getter(team, ctx);
 365         return 0;
 366 }
 367
 368 static int team_option_set(struct team *team,
 369                            struct team_option_inst *opt_inst,
 370                            struct team_gsetter_ctx *ctx)
 371 {
 372         if (!opt_inst->option->setter)
 373                 return -EOPNOTSUPP;
 374         return opt_inst->option->setter(team, ctx);
 375 }
 376
 377 void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info)
 378 {
 379         struct team_option_inst *opt_inst;
 380
 381         opt_inst = container_of(opt_inst_info, struct team_option_inst, info);
 382         opt_inst->changed = true;
 383 }
 384 EXPORT_SYMBOL(team_option_inst_set_change);
 385
 386 void team_options_change_check(struct team *team)
 387 {
 388         __team_options_change_check(team);
 389 }
 390 EXPORT_SYMBOL(team_options_change_check);
 391
 392
 393 /****************
 394  * Mode handling
 395  ****************/
 396
 397 static LIST_HEAD(mode_list);
 398 static DEFINE_SPINLOCK(mode_list_lock);
 399
 400 struct team_mode_item {
 401         struct list_head list;
 402         const struct team_mode *mode;
 403 };
 404
 405 static struct team_mode_item *__find_mode(const char *kind)
 406 {
 407         struct team_mode_item *mitem;
 408
 409         list_for_each_entry(mitem, &mode_list, list) {
 410                 if (strcmp(mitem->mode->kind, kind) == 0)
 411                         return mitem;
 412         }
 413         return NULL;
 414 }
 415
 416 static bool is_good_mode_name(const char *name)
 417 {
 418         while (*name != '\0') {
 419                 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
 420                         return false;
 421                 name++;
 422         }
 423         return true;
 424 }
 425
 426 int team_mode_register(const struct team_mode *mode)
 427 {
 428         int err = 0;
 429         struct team_mode_item *mitem;
 430
 431         if (!is_good_mode_name(mode->kind) ||
 432             mode->priv_size > TEAM_MODE_PRIV_SIZE)
 433                 return -EINVAL;
 434
 435         mitem = kmalloc(sizeof(*mitem), GFP_KERNEL);
 436         if (!mitem)
 437                 return -ENOMEM;
 438
 439         spin_lock(&mode_list_lock);
 440         if (__find_mode(mode->kind)) {
 441                 err = -EEXIST;
 442                 kfree(mitem);
 443                 goto unlock;
 444         }
 445         mitem->mode = mode;
 446         list_add_tail(&mitem->list, &mode_list);
 447 unlock:
 448         spin_unlock(&mode_list_lock);
 449         return err;
 450 }
 451 EXPORT_SYMBOL(team_mode_register);
 452
 453 void team_mode_unregister(const struct team_mode *mode)
 454 {
 455         struct team_mode_item *mitem;
 456
 457         spin_lock(&mode_list_lock);
 458         mitem = __find_mode(mode->kind);
 459         if (mitem) {
 460                 list_del_init(&mitem->list);
 461                 kfree(mitem);
 462         }
 463         spin_unlock(&mode_list_lock);
 464 }
 465 EXPORT_SYMBOL(team_mode_unregister);
 466
 467 static const struct team_mode *team_mode_get(const char *kind)
 468 {
 469         struct team_mode_item *mitem;
 470         const struct team_mode *mode = NULL;
 471
 472         if (!try_module_get(THIS_MODULE))
 473                 return NULL;
 474
 475         spin_lock(&mode_list_lock);
 476         mitem = __find_mode(kind);
 477         if (!mitem) {
 478                 spin_unlock(&mode_list_lock);
 479                 request_module("team-mode-%s", kind);
 480                 spin_lock(&mode_list_lock);
 481                 mitem = __find_mode(kind);
 482         }
 483         if (mitem) {
 484                 mode = mitem->mode;
 485                 if (!try_module_get(mode->owner))
 486                         mode = NULL;
 487         }
 488
 489         spin_unlock(&mode_list_lock);
 490         module_put(THIS_MODULE);
 491         return mode;
 492 }
 493
 494 static void team_mode_put(const struct team_mode *mode)
 495 {
 496         module_put(mode->owner);
 497 }
 498
 499 static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
 500 {
 501         dev_kfree_skb_any(skb);
 502         return false;
 503 }
 504
 505 static rx_handler_result_t team_dummy_receive(struct team *team,
 506                                               struct team_port *port,
 507                                               struct sk_buff *skb)
 508 {
 509         return RX_HANDLER_ANOTHER;
 510 }
 511
 512 static const struct team_mode __team_no_mode = {
 513         .kind           = "*NOMODE*",
 514 };
 515
 516 static bool team_is_mode_set(struct team *team)
 517 {
 518         return team->mode != &__team_no_mode;
 519 }
 520
 521 static void team_set_no_mode(struct team *team)
 522 {
 523         team->user_carrier_enabled = false;
 524         team->mode = &__team_no_mode;
 525 }
 526
 527 static void team_adjust_ops(struct team *team)
 528 {
 529         /*
 530          * To avoid checks in rx/tx skb paths, ensure here that non-null and
 531          * correct ops are always set.
 532          */
 533
 534         if (!team->en_port_count || !team_is_mode_set(team) ||
 535             !team->mode->ops->transmit)
 536                 team->ops.transmit = team_dummy_transmit;
 537         else
 538                 team->ops.transmit = team->mode->ops->transmit;
 539
 540         if (!team->en_port_count || !team_is_mode_set(team) ||
 541             !team->mode->ops->receive)
 542                 team->ops.receive = team_dummy_receive;
 543         else
 544                 team->ops.receive = team->mode->ops->receive;
 545 }
 546
 547 /*
 548  * We can benefit from the fact that it's ensured no port is present
 549  * at the time of mode change. Therefore no packets are in fly so there's no
 550  * need to set mode operations in any special way.
 551  */
 552 static int __team_change_mode(struct team *team,
 553                               const struct team_mode *new_mode)
 554 {
 555         /* Check if mode was previously set and do cleanup if so */
 556         if (team_is_mode_set(team)) {
 557                 void (*exit_op)(struct team *team) = team->ops.exit;
 558
 559                 /* Clear ops area so no callback is called any longer */
 560                 memset(&team->ops, 0, sizeof(struct team_mode_ops));
 561                 team_adjust_ops(team);
 562
 563                 if (exit_op)
 564                         exit_op(team);
 565                 team_mode_put(team->mode);
 566                 team_set_no_mode(team);
 567                 /* zero private data area */
 568                 memset(&team->mode_priv, 0,
 569                        sizeof(struct team) - offsetof(struct team, mode_priv));
 570         }
 571
 572         if (!new_mode)
 573                 return 0;
 574
 575         if (new_mode->ops->init) {
 576                 int err;
 577
 578                 err = new_mode->ops->init(team);
 579                 if (err)
 580                         return err;
 581         }
 582
 583         team->mode = new_mode;
 584         memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
 585         team_adjust_ops(team);
 586
 587         return 0;
 588 }
 589
 590 static int team_change_mode(struct team *team, const char *kind)
 591 {
 592         const struct team_mode *new_mode;
 593         struct net_device *dev = team->dev;
 594         int err;
 595
 596         if (!list_empty(&team->port_list)) {
 597                 netdev_err(dev, "No ports can be present during mode change\n");
 598                 return -EBUSY;
 599         }
 600
 601         if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) {
 602                 netdev_err(dev, "Unable to change to the same mode the team is in\n");
 603                 return -EINVAL;
 604         }
 605
 606         new_mode = team_mode_get(kind);
 607         if (!new_mode) {
 608                 netdev_err(dev, "Mode \"%s\" not found\n", kind);
 609                 return -EINVAL;
 610         }
 611
 612         err = __team_change_mode(team, new_mode);
 613         if (err) {
 614                 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
 615                 team_mode_put(new_mode);
 616                 return err;
 617         }
 618
 619         netdev_info(dev, "Mode changed to \"%s\"\n", kind);
 620         return 0;
 621 }
 622
 623
 624 /*********************
 625  * Peers notification
 626  *********************/
 627
 628 static void team_notify_peers_work(struct work_struct *work)
 629 {
 630         struct team *team;
 631         int val;
 632
 633         team = container_of(work, struct team, notify_peers.dw.work);
 634
 635         if (!rtnl_trylock()) {
 636                 schedule_delayed_work(&team->notify_peers.dw, 0);
 637                 return;
 638         }
 639         val = atomic_dec_if_positive(&team->notify_peers.count_pending);
 640         if (val < 0) {
 641                 rtnl_unlock();
 642                 return;
 643         }
 644         call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, team->dev);
 645         rtnl_unlock();
 646         if (val)
 647                 schedule_delayed_work(&team->notify_peers.dw,
 648                                       msecs_to_jiffies(team->notify_peers.interval));
 649 }
 650
 651 static void team_notify_peers(struct team *team)
 652 {
 653         if (!team->notify_peers.count || !netif_running(team->dev))
 654                 return;
 655         atomic_add(team->notify_peers.count, &team->notify_peers.count_pending);
 656         schedule_delayed_work(&team->notify_peers.dw, 0);
 657 }
 658
 659 static void team_notify_peers_init(struct team *team)
 660 {
 661         INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work);
 662 }
 663
 664 static void team_notify_peers_fini(struct team *team)
 665 {
 666         cancel_delayed_work_sync(&team->notify_peers.dw);
 667 }
 668
 669
 670 /*******************************
 671  * Send multicast group rejoins
 672  *******************************/
 673
 674 static void team_mcast_rejoin_work(struct work_struct *work)
 675 {
 676         struct team *team;
 677         int val;
 678
 679         team = container_of(work, struct team, mcast_rejoin.dw.work);
 680
 681         if (!rtnl_trylock()) {
 682                 schedule_delayed_work(&team->mcast_rejoin.dw, 0);
 683                 return;
 684         }
 685         val = atomic_dec_if_positive(&team->mcast_rejoin.count_pending);
 686         if (val < 0) {
 687                 rtnl_unlock();
 688                 return;
 689         }
 690         call_netdevice_notifiers(NETDEV_RESEND_IGMP, team->dev);
 691         rtnl_unlock();
 692         if (val)
 693                 schedule_delayed_work(&team->mcast_rejoin.dw,
 694                                       msecs_to_jiffies(team->mcast_rejoin.interval));
 695 }
 696
 697 static void team_mcast_rejoin(struct team *team)
 698 {
 699         if (!team->mcast_rejoin.count || !netif_running(team->dev))
 700                 return;
 701         atomic_add(team->mcast_rejoin.count, &team->mcast_rejoin.count_pending);
 702         schedule_delayed_work(&team->mcast_rejoin.dw, 0);
 703 }
 704
 705 static void team_mcast_rejoin_init(struct team *team)
 706 {
 707         INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work);
 708 }
 709
 710 static void team_mcast_rejoin_fini(struct team *team)
 711 {
 712         cancel_delayed_work_sync(&team->mcast_rejoin.dw);
 713 }
 714
 715
 716 /************************
 717  * Rx path frame handler
 718  ************************/
 719
 720 /* note: already called with rcu_read_lock */
 721 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
 722 {
 723         struct sk_buff *skb = *pskb;
 724         struct team_port *port;
 725         struct team *team;
 726         rx_handler_result_t res;
 727
 728         skb = skb_share_check(skb, GFP_ATOMIC);
 729         if (!skb)
 730                 return RX_HANDLER_CONSUMED;
 731
 732         *pskb = skb;
 733
 734         port = team_port_get_rcu(skb->dev);
 735         team = port->team;
 736         if (!team_port_enabled(port)) {
 737                 if (is_link_local_ether_addr(eth_hdr(skb)->h_dest))
 738                         /* link-local packets are mostly useful when stack receives them
 739                          * with the link they arrive on.
 740                          */
 741                         return RX_HANDLER_PASS;
 742                 /* allow exact match delivery for disabled ports */
 743                 res = RX_HANDLER_EXACT;
 744         } else {
 745                 res = team->ops.receive(team, port, skb);
 746         }
 747         if (res == RX_HANDLER_ANOTHER) {
 748                 struct team_pcpu_stats *pcpu_stats;
 749
 750                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
 751                 u64_stats_update_begin(&pcpu_stats->syncp);
 752                 u64_stats_inc(&pcpu_stats->rx_packets);
 753                 u64_stats_add(&pcpu_stats->rx_bytes, skb->len);
 754                 if (skb->pkt_type == PACKET_MULTICAST)
 755                         u64_stats_inc(&pcpu_stats->rx_multicast);
 756                 u64_stats_update_end(&pcpu_stats->syncp);
 757
 758                 skb->dev = team->dev;
 759         } else if (res == RX_HANDLER_EXACT) {
 760                 this_cpu_inc(team->pcpu_stats->rx_nohandler);
 761         } else {
 762                 this_cpu_inc(team->pcpu_stats->rx_dropped);
 763         }
 764
 765         return res;
 766 }
 767
 768
 769 /*************************************
 770  * Multiqueue Tx port select override
 771  *************************************/
 772
 773 static int team_queue_override_init(struct team *team)
 774 {
 775         struct list_head *listarr;
 776         unsigned int queue_cnt = team->dev->num_tx_queues - 1;
 777         unsigned int i;
 778
 779         if (!queue_cnt)
 780                 return 0;
 781         listarr = kmalloc_array(queue_cnt, sizeof(struct list_head),
 782                                 GFP_KERNEL);
 783         if (!listarr)
 784                 return -ENOMEM;
 785         team->qom_lists = listarr;
 786         for (i = 0; i < queue_cnt; i++)
 787                 INIT_LIST_HEAD(listarr++);
 788         return 0;
 789 }
 790
 791 static void team_queue_override_fini(struct team *team)
 792 {
 793         kfree(team->qom_lists);
 794 }
 795
 796 static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
 797 {
 798         return &team->qom_lists[queue_id - 1];
 799 }
 800
 801 /*
 802  * note: already called with rcu_read_lock
 803  */
 804 static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
 805 {
 806         struct list_head *qom_list;
 807         struct team_port *port;
 808
 809         if (!team->queue_override_enabled || !skb->queue_mapping)
 810                 return false;
 811         qom_list = __team_get_qom_list(team, skb->queue_mapping);
 812         list_for_each_entry_rcu(port, qom_list, qom_list) {
 813                 if (!team_dev_queue_xmit(team, port, skb))
 814                         return true;
 815         }
 816         return false;
 817 }
 818
 819 static void __team_queue_override_port_del(struct team *team,
 820                                            struct team_port *port)
 821 {
 822         if (!port->queue_id)
 823                 return;
 824         list_del_rcu(&port->qom_list);
 825 }
 826
 827 static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
 828                                                       struct team_port *cur)
 829 {
 830         if (port->priority < cur->priority)
 831                 return true;
 832         if (port->priority > cur->priority)
 833                 return false;
 834         if (port->index < cur->index)
 835                 return true;
 836         return false;
 837 }
 838
 839 static void __team_queue_override_port_add(struct team *team,
 840                                            struct team_port *port)
 841 {
 842         struct team_port *cur;
 843         struct list_head *qom_list;
 844         struct list_head *node;
 845
 846         if (!port->queue_id)
 847                 return;
 848         qom_list = __team_get_qom_list(team, port->queue_id);
 849         node = qom_list;
 850         list_for_each_entry(cur, qom_list, qom_list) {
 851                 if (team_queue_override_port_has_gt_prio_than(port, cur))
 852                         break;
 853                 node = &cur->qom_list;
 854         }
 855         list_add_tail_rcu(&port->qom_list, node);
 856 }
 857
 858 static void __team_queue_override_enabled_check(struct team *team)
 859 {
 860         struct team_port *port;
 861         bool enabled = false;
 862
 863         list_for_each_entry(port, &team->port_list, list) {
 864                 if (port->queue_id) {
 865                         enabled = true;
 866                         break;
 867                 }
 868         }
 869         if (enabled == team->queue_override_enabled)
 870                 return;
 871         netdev_dbg(team->dev, "%s queue override\n",
 872                    enabled ? "Enabling" : "Disabling");
 873         team->queue_override_enabled = enabled;
 874 }
 875
 876 static void team_queue_override_port_prio_changed(struct team *team,
 877                                                   struct team_port *port)
 878 {
 879         if (!port->queue_id || team_port_enabled(port))
 880                 return;
 881         __team_queue_override_port_del(team, port);
 882         __team_queue_override_port_add(team, port);
 883         __team_queue_override_enabled_check(team);
 884 }
 885
 886 static void team_queue_override_port_change_queue_id(struct team *team,
 887                                                      struct team_port *port,
 888                                                      u16 new_queue_id)
 889 {
 890         if (team_port_enabled(port)) {
 891                 __team_queue_override_port_del(team, port);
 892                 port->queue_id = new_queue_id;
 893                 __team_queue_override_port_add(team, port);
 894                 __team_queue_override_enabled_check(team);
 895         } else {
 896                 port->queue_id = new_queue_id;
 897         }
 898 }
 899
 900 static void team_queue_override_port_add(struct team *team,
 901                                          struct team_port *port)
 902 {
 903         __team_queue_override_port_add(team, port);
 904         __team_queue_override_enabled_check(team);
 905 }
 906
 907 static void team_queue_override_port_del(struct team *team,
 908                                          struct team_port *port)
 909 {
 910         __team_queue_override_port_del(team, port);
 911         __team_queue_override_enabled_check(team);
 912 }
 913
 914
 915 /****************
 916  * Port handling
 917  ****************/
 918
 919 static bool team_port_find(const struct team *team,
 920                            const struct team_port *port)
 921 {
 922         struct team_port *cur;
 923
 924         list_for_each_entry(cur, &team->port_list, list)
 925                 if (cur == port)
 926                         return true;
 927         return false;
 928 }
 929
 930 /*
 931  * Enable/disable port by adding to enabled port hashlist and setting
 932  * port->index (Might be racy so reader could see incorrect ifindex when
 933  * processing a flying packet, but that is not a problem). Write guarded
 934  * by team->lock.
 935  */
 936 static void team_port_enable(struct team *team,
 937                              struct team_port *port)
 938 {
 939         if (team_port_enabled(port))
 940                 return;
 941         port->index = team->en_port_count++;
 942         hlist_add_head_rcu(&port->hlist,
 943                            team_port_index_hash(team, port->index));
 944         team_adjust_ops(team);
 945         team_queue_override_port_add(team, port);
 946         if (team->ops.port_enabled)
 947                 team->ops.port_enabled(team, port);
 948         team_notify_peers(team);
 949         team_mcast_rejoin(team);
 950         team_lower_state_changed(port);
 951 }
 952
 953 static void __reconstruct_port_hlist(struct team *team, int rm_index)
 954 {
 955         int i;
 956         struct team_port *port;
 957
 958         for (i = rm_index + 1; i < team->en_port_count; i++) {
 959                 port = team_get_port_by_index(team, i);
 960                 hlist_del_rcu(&port->hlist);
 961                 port->index--;
 962                 hlist_add_head_rcu(&port->hlist,
 963                                    team_port_index_hash(team, port->index));
 964         }
 965 }
 966
 967 static void team_port_disable(struct team *team,
 968                               struct team_port *port)
 969 {
 970         if (!team_port_enabled(port))
 971                 return;
 972         if (team->ops.port_disabled)
 973                 team->ops.port_disabled(team, port);
 974         hlist_del_rcu(&port->hlist);
 975         __reconstruct_port_hlist(team, port->index);
 976         port->index = -1;
 977         team->en_port_count--;
 978         team_queue_override_port_del(team, port);
 979         team_adjust_ops(team);
 980         team_lower_state_changed(port);
 981 }
 982
 983 #define TEAM_VLAN_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
 984                             NETIF_F_FRAGLIST | NETIF_F_GSO_SOFTWARE | \
 985                             NETIF_F_HIGHDMA | NETIF_F_LRO)
 986
 987 #define TEAM_ENC_FEATURES       (NETIF_F_HW_CSUM | NETIF_F_SG | \
 988                                  NETIF_F_RXCSUM | NETIF_F_GSO_SOFTWARE)
 989
 990 static void __team_compute_features(struct team *team)
 991 {
 992         struct team_port *port;
 993         netdev_features_t vlan_features = TEAM_VLAN_FEATURES &
 994                                           NETIF_F_ALL_FOR_ALL;
 995         netdev_features_t enc_features  = TEAM_ENC_FEATURES;
 996         unsigned short max_hard_header_len = ETH_HLEN;
 997         unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE |
 998                                         IFF_XMIT_DST_RELEASE_PERM;
 999
1000         rcu_read_lock();
1001         list_for_each_entry_rcu(port, &team->port_list, list) {
1002                 vlan_features = netdev_increment_features(vlan_features,
1003                                         port->dev->vlan_features,
1004                                         TEAM_VLAN_FEATURES);
1005                 enc_features =
1006                         netdev_increment_features(enc_features,
1007                                                   port->dev->hw_enc_features,
1008                                                   TEAM_ENC_FEATURES);
1009
1010
1011                 dst_release_flag &= port->dev->priv_flags;
1012                 if (port->dev->hard_header_len > max_hard_header_len)
1013                         max_hard_header_len = port->dev->hard_header_len;
1014         }
1015         rcu_read_unlock();
1016
1017         team->dev->vlan_features = vlan_features;
1018         team->dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL |
1019                                      NETIF_F_HW_VLAN_CTAG_TX |
1020                                      NETIF_F_HW_VLAN_STAG_TX;
1021         team->dev->hard_header_len = max_hard_header_len;
1022
1023         team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
1024         if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
1025                 team->dev->priv_flags |= IFF_XMIT_DST_RELEASE;
1026 }
1027
1028 static void team_compute_features(struct team *team)
1029 {
1030         __team_compute_features(team);
1031         netdev_change_features(team->dev);
1032 }
1033
1034 static int team_port_enter(struct team *team, struct team_port *port)
1035 {
1036         int err = 0;
1037
1038         dev_hold(team->dev);
1039         if (team->ops.port_enter) {
1040                 err = team->ops.port_enter(team, port);
1041                 if (err) {
1042                         netdev_err(team->dev, "Device %s failed to enter team mode\n",
1043                                    port->dev->name);
1044                         goto err_port_enter;
1045                 }
1046         }
1047
1048         return 0;
1049
1050 err_port_enter:
1051         dev_put(team->dev);
1052
1053         return err;
1054 }
1055
1056 static void team_port_leave(struct team *team, struct team_port *port)
1057 {
1058         if (team->ops.port_leave)
1059                 team->ops.port_leave(team, port);
1060         dev_put(team->dev);
1061 }
1062
1063 #ifdef CONFIG_NET_POLL_CONTROLLER
1064 static int __team_port_enable_netpoll(struct team_port *port)
1065 {
1066         struct netpoll *np;
1067         int err;
1068
1069         np = kzalloc(sizeof(*np), GFP_KERNEL);
1070         if (!np)
1071                 return -ENOMEM;
1072
1073         err = __netpoll_setup(np, port->dev);
1074         if (err) {
1075                 kfree(np);
1076                 return err;
1077         }
1078         port->np = np;
1079         return err;
1080 }
1081
1082 static int team_port_enable_netpoll(struct team_port *port)
1083 {
1084         if (!port->team->dev->npinfo)
1085                 return 0;
1086
1087         return __team_port_enable_netpoll(port);
1088 }
1089
1090 static void team_port_disable_netpoll(struct team_port *port)
1091 {
1092         struct netpoll *np = port->np;
1093
1094         if (!np)
1095                 return;
1096         port->np = NULL;
1097
1098         __netpoll_free(np);
1099 }
1100 #else
1101 static int team_port_enable_netpoll(struct team_port *port)
1102 {
1103         return 0;
1104 }
1105 static void team_port_disable_netpoll(struct team_port *port)
1106 {
1107 }
1108 #endif
1109
1110 static int team_upper_dev_link(struct team *team, struct team_port *port,
1111                                struct netlink_ext_ack *extack)
1112 {
1113         struct netdev_lag_upper_info lag_upper_info;
1114         int err;
1115
1116         lag_upper_info.tx_type = team->mode->lag_tx_type;
1117         lag_upper_info.hash_type = NETDEV_LAG_HASH_UNKNOWN;
1118         err = netdev_master_upper_dev_link(port->dev, team->dev, NULL,
1119                                            &lag_upper_info, extack);
1120         if (err)
1121                 return err;
1122         port->dev->priv_flags |= IFF_TEAM_PORT;
1123         return 0;
1124 }
1125
1126 static void team_upper_dev_unlink(struct team *team, struct team_port *port)
1127 {
1128         netdev_upper_dev_unlink(port->dev, team->dev);
1129         port->dev->priv_flags &= ~IFF_TEAM_PORT;
1130 }
1131
1132 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1133 static int team_dev_type_check_change(struct net_device *dev,
1134                                       struct net_device *port_dev);
1135
1136 static int team_port_add(struct team *team, struct net_device *port_dev,
1137                          struct netlink_ext_ack *extack)
1138 {
1139         struct net_device *dev = team->dev;
1140         struct team_port *port;
1141         char *portname = port_dev->name;
1142         int err;
1143
1144         if (port_dev->flags & IFF_LOOPBACK) {
1145                 NL_SET_ERR_MSG(extack, "Loopback device can't be added as a team port");
1146                 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1147                            portname);
1148                 return -EINVAL;
1149         }
1150
1151         if (netif_is_team_port(port_dev)) {
1152                 NL_SET_ERR_MSG(extack, "Device is already a port of a team device");
1153                 netdev_err(dev, "Device %s is already a port "
1154                                 "of a team device\n", portname);
1155                 return -EBUSY;
1156         }
1157
1158         if (dev == port_dev) {
1159                 NL_SET_ERR_MSG(extack, "Cannot enslave team device to itself");
1160                 netdev_err(dev, "Cannot enslave team device to itself\n");
1161                 return -EINVAL;
1162         }
1163
1164         if (netdev_has_upper_dev(dev, port_dev)) {
1165                 NL_SET_ERR_MSG(extack, "Device is already an upper device of the team interface");
1166                 netdev_err(dev, "Device %s is already an upper device of the team interface\n",
1167                            portname);
1168                 return -EBUSY;
1169         }
1170
1171         if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1172             vlan_uses_dev(dev)) {
1173                 NL_SET_ERR_MSG(extack, "Device is VLAN challenged and team device has VLAN set up");
1174                 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1175                            portname);
1176                 return -EPERM;
1177         }
1178
1179         err = team_dev_type_check_change(dev, port_dev);
1180         if (err)
1181                 return err;
1182
1183         if (port_dev->flags & IFF_UP) {
1184                 NL_SET_ERR_MSG(extack, "Device is up. Set it down before adding it as a team port");
1185                 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1186                            portname);
1187                 return -EBUSY;
1188         }
1189
1190         port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1191                        GFP_KERNEL);
1192         if (!port)
1193                 return -ENOMEM;
1194
1195         port->dev = port_dev;
1196         port->team = team;
1197         INIT_LIST_HEAD(&port->qom_list);
1198
1199         port->orig.mtu = port_dev->mtu;
1200         err = dev_set_mtu(port_dev, dev->mtu);
1201         if (err) {
1202                 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1203                 goto err_set_mtu;
1204         }
1205
1206         memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1207
1208         err = team_port_enter(team, port);
1209         if (err) {
1210                 netdev_err(dev, "Device %s failed to enter team mode\n",
1211                            portname);
1212                 goto err_port_enter;
1213         }
1214
1215         err = dev_open(port_dev, extack);
1216         if (err) {
1217                 netdev_dbg(dev, "Device %s opening failed\n",
1218                            portname);
1219                 goto err_dev_open;
1220         }
1221
1222         err = vlan_vids_add_by_dev(port_dev, dev);
1223         if (err) {
1224                 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1225                                 portname);
1226                 goto err_vids_add;
1227         }
1228
1229         err = team_port_enable_netpoll(port);
1230         if (err) {
1231                 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1232                            portname);
1233                 goto err_enable_netpoll;
1234         }
1235
1236         if (!(dev->features & NETIF_F_LRO))
1237                 dev_disable_lro(port_dev);
1238
1239         err = netdev_rx_handler_register(port_dev, team_handle_frame,
1240                                          port);
1241         if (err) {
1242                 netdev_err(dev, "Device %s failed to register rx_handler\n",
1243                            portname);
1244                 goto err_handler_register;
1245         }
1246
1247         err = team_upper_dev_link(team, port, extack);
1248         if (err) {
1249                 netdev_err(dev, "Device %s failed to set upper link\n",
1250                            portname);
1251                 goto err_set_upper_link;
1252         }
1253
1254         err = __team_option_inst_add_port(team, port);
1255         if (err) {
1256                 netdev_err(dev, "Device %s failed to add per-port options\n",
1257                            portname);
1258                 goto err_option_port_add;
1259         }
1260
1261         /* set promiscuity level to new slave */
1262         if (dev->flags & IFF_PROMISC) {
1263                 err = dev_set_promiscuity(port_dev, 1);
1264                 if (err)
1265                         goto err_set_slave_promisc;
1266         }
1267
1268         /* set allmulti level to new slave */
1269         if (dev->flags & IFF_ALLMULTI) {
1270                 err = dev_set_allmulti(port_dev, 1);
1271                 if (err) {
1272                         if (dev->flags & IFF_PROMISC)
1273                                 dev_set_promiscuity(port_dev, -1);
1274                         goto err_set_slave_promisc;
1275                 }
1276         }
1277
1278         if (dev->flags & IFF_UP) {
1279                 netif_addr_lock_bh(dev);
1280                 dev_uc_sync_multiple(port_dev, dev);
1281                 dev_mc_sync_multiple(port_dev, dev);
1282                 netif_addr_unlock_bh(dev);
1283         }
1284
1285         port->index = -1;
1286         list_add_tail_rcu(&port->list, &team->port_list);
1287         team_port_enable(team, port);
1288         __team_compute_features(team);
1289         __team_port_change_port_added(port, !!netif_oper_up(port_dev));
1290         __team_options_change_check(team);
1291
1292         netdev_info(dev, "Port device %s added\n", portname);
1293
1294         return 0;
1295
1296 err_set_slave_promisc:
1297         __team_option_inst_del_port(team, port);
1298
1299 err_option_port_add:
1300         team_upper_dev_unlink(team, port);
1301
1302 err_set_upper_link:
1303         netdev_rx_handler_unregister(port_dev);
1304
1305 err_handler_register:
1306         team_port_disable_netpoll(port);
1307
1308 err_enable_netpoll:
1309         vlan_vids_del_by_dev(port_dev, dev);
1310
1311 err_vids_add:
1312         dev_close(port_dev);
1313
1314 err_dev_open:
1315         team_port_leave(team, port);
1316         team_port_set_orig_dev_addr(port);
1317
1318 err_port_enter:
1319         dev_set_mtu(port_dev, port->orig.mtu);
1320
1321 err_set_mtu:
1322         kfree(port);
1323
1324         return err;
1325 }
1326
1327 static void __team_port_change_port_removed(struct team_port *port);
1328
1329 static int team_port_del(struct team *team, struct net_device *port_dev)
1330 {
1331         struct net_device *dev = team->dev;
1332         struct team_port *port;
1333         char *portname = port_dev->name;
1334
1335         port = team_port_get_rtnl(port_dev);
1336         if (!port || !team_port_find(team, port)) {
1337                 netdev_err(dev, "Device %s does not act as a port of this team\n",
1338                            portname);
1339                 return -ENOENT;
1340         }
1341
1342         team_port_disable(team, port);
1343         list_del_rcu(&port->list);
1344
1345         if (dev->flags & IFF_PROMISC)
1346                 dev_set_promiscuity(port_dev, -1);
1347         if (dev->flags & IFF_ALLMULTI)
1348                 dev_set_allmulti(port_dev, -1);
1349
1350         team_upper_dev_unlink(team, port);
1351         netdev_rx_handler_unregister(port_dev);
1352         team_port_disable_netpoll(port);
1353         vlan_vids_del_by_dev(port_dev, dev);
1354         if (dev->flags & IFF_UP) {
1355                 dev_uc_unsync(port_dev, dev);
1356                 dev_mc_unsync(port_dev, dev);
1357         }
1358         dev_close(port_dev);
1359         team_port_leave(team, port);
1360
1361         __team_option_inst_mark_removed_port(team, port);
1362         __team_options_change_check(team);
1363         __team_option_inst_del_port(team, port);
1364         __team_port_change_port_removed(port);
1365
1366         team_port_set_orig_dev_addr(port);
1367         dev_set_mtu(port_dev, port->orig.mtu);
1368         kfree_rcu(port, rcu);
1369         netdev_info(dev, "Port device %s removed\n", portname);
1370         __team_compute_features(team);
1371
1372         return 0;
1373 }
1374
1375
1376 /*****************
1377  * Net device ops
1378  *****************/
1379
1380 static void team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1381 {
1382         ctx->data.str_val = team->mode->kind;
1383 }
1384
1385 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1386 {
1387         return team_change_mode(team, ctx->data.str_val);
1388 }
1389
1390 static void team_notify_peers_count_get(struct team *team,
1391                                         struct team_gsetter_ctx *ctx)
1392 {
1393         ctx->data.u32_val = team->notify_peers.count;
1394 }
1395
1396 static int team_notify_peers_count_set(struct team *team,
1397                                        struct team_gsetter_ctx *ctx)
1398 {
1399         team->notify_peers.count = ctx->data.u32_val;
1400         return 0;
1401 }
1402
1403 static void team_notify_peers_interval_get(struct team *team,
1404                                            struct team_gsetter_ctx *ctx)
1405 {
1406         ctx->data.u32_val = team->notify_peers.interval;
1407 }
1408
1409 static int team_notify_peers_interval_set(struct team *team,
1410                                           struct team_gsetter_ctx *ctx)
1411 {
1412         team->notify_peers.interval = ctx->data.u32_val;
1413         return 0;
1414 }
1415
1416 static void team_mcast_rejoin_count_get(struct team *team,
1417                                         struct team_gsetter_ctx *ctx)
1418 {
1419         ctx->data.u32_val = team->mcast_rejoin.count;
1420 }
1421
1422 static int team_mcast_rejoin_count_set(struct team *team,
1423                                        struct team_gsetter_ctx *ctx)
1424 {
1425         team->mcast_rejoin.count = ctx->data.u32_val;
1426         return 0;
1427 }
1428
1429 static void team_mcast_rejoin_interval_get(struct team *team,
1430                                            struct team_gsetter_ctx *ctx)
1431 {
1432         ctx->data.u32_val = team->mcast_rejoin.interval;
1433 }
1434
1435 static int team_mcast_rejoin_interval_set(struct team *team,
1436                                           struct team_gsetter_ctx *ctx)
1437 {
1438         team->mcast_rejoin.interval = ctx->data.u32_val;
1439         return 0;
1440 }
1441
1442 static void team_port_en_option_get(struct team *team,
1443                                     struct team_gsetter_ctx *ctx)
1444 {
1445         struct team_port *port = ctx->info->port;
1446
1447         ctx->data.bool_val = team_port_enabled(port);
1448 }
1449
1450 static int team_port_en_option_set(struct team *team,
1451                                    struct team_gsetter_ctx *ctx)
1452 {
1453         struct team_port *port = ctx->info->port;
1454
1455         if (ctx->data.bool_val)
1456                 team_port_enable(team, port);
1457         else
1458                 team_port_disable(team, port);
1459         return 0;
1460 }
1461
1462 static void team_user_linkup_option_get(struct team *team,
1463                                         struct team_gsetter_ctx *ctx)
1464 {
1465         struct team_port *port = ctx->info->port;
1466
1467         ctx->data.bool_val = port->user.linkup;
1468 }
1469
1470 static void __team_carrier_check(struct team *team);
1471
1472 static int team_user_linkup_option_set(struct team *team,
1473                                        struct team_gsetter_ctx *ctx)
1474 {
1475         struct team_port *port = ctx->info->port;
1476
1477         port->user.linkup = ctx->data.bool_val;
1478         team_refresh_port_linkup(port);
1479         __team_carrier_check(port->team);
1480         return 0;
1481 }
1482
1483 static void team_user_linkup_en_option_get(struct team *team,
1484                                            struct team_gsetter_ctx *ctx)
1485 {
1486         struct team_port *port = ctx->info->port;
1487
1488         ctx->data.bool_val = port->user.linkup_enabled;
1489 }
1490
1491 static int team_user_linkup_en_option_set(struct team *team,
1492                                           struct team_gsetter_ctx *ctx)
1493 {
1494         struct team_port *port = ctx->info->port;
1495
1496         port->user.linkup_enabled = ctx->data.bool_val;
1497         team_refresh_port_linkup(port);
1498         __team_carrier_check(port->team);
1499         return 0;
1500 }
1501
1502 static void team_priority_option_get(struct team *team,
1503                                      struct team_gsetter_ctx *ctx)
1504 {
1505         struct team_port *port = ctx->info->port;
1506
1507         ctx->data.s32_val = port->priority;
1508 }
1509
1510 static int team_priority_option_set(struct team *team,
1511                                     struct team_gsetter_ctx *ctx)
1512 {
1513         struct team_port *port = ctx->info->port;
1514         s32 priority = ctx->data.s32_val;
1515
1516         if (port->priority == priority)
1517                 return 0;
1518         port->priority = priority;
1519         team_queue_override_port_prio_changed(team, port);
1520         return 0;
1521 }
1522
1523 static void team_queue_id_option_get(struct team *team,
1524                                      struct team_gsetter_ctx *ctx)
1525 {
1526         struct team_port *port = ctx->info->port;
1527
1528         ctx->data.u32_val = port->queue_id;
1529 }
1530
1531 static int team_queue_id_option_set(struct team *team,
1532                                     struct team_gsetter_ctx *ctx)
1533 {
1534         struct team_port *port = ctx->info->port;
1535         u16 new_queue_id = ctx->data.u32_val;
1536
1537         if (port->queue_id == new_queue_id)
1538                 return 0;
1539         if (new_queue_id >= team->dev->real_num_tx_queues)
1540                 return -EINVAL;
1541         team_queue_override_port_change_queue_id(team, port, new_queue_id);
1542         return 0;
1543 }
1544
1545 static const struct team_option team_options[] = {
1546         {
1547                 .name = "mode",
1548                 .type = TEAM_OPTION_TYPE_STRING,
1549                 .getter = team_mode_option_get,
1550                 .setter = team_mode_option_set,
1551         },
1552         {
1553                 .name = "notify_peers_count",
1554                 .type = TEAM_OPTION_TYPE_U32,
1555                 .getter = team_notify_peers_count_get,
1556                 .setter = team_notify_peers_count_set,
1557         },
1558         {
1559                 .name = "notify_peers_interval",
1560                 .type = TEAM_OPTION_TYPE_U32,
1561                 .getter = team_notify_peers_interval_get,
1562                 .setter = team_notify_peers_interval_set,
1563         },
1564         {
1565                 .name = "mcast_rejoin_count",
1566                 .type = TEAM_OPTION_TYPE_U32,
1567                 .getter = team_mcast_rejoin_count_get,
1568                 .setter = team_mcast_rejoin_count_set,
1569         },
1570         {
1571                 .name = "mcast_rejoin_interval",
1572                 .type = TEAM_OPTION_TYPE_U32,
1573                 .getter = team_mcast_rejoin_interval_get,
1574                 .setter = team_mcast_rejoin_interval_set,
1575         },
1576         {
1577                 .name = "enabled",
1578                 .type = TEAM_OPTION_TYPE_BOOL,
1579                 .per_port = true,
1580                 .getter = team_port_en_option_get,
1581                 .setter = team_port_en_option_set,
1582         },
1583         {
1584                 .name = "user_linkup",
1585                 .type = TEAM_OPTION_TYPE_BOOL,
1586                 .per_port = true,
1587                 .getter = team_user_linkup_option_get,
1588                 .setter = team_user_linkup_option_set,
1589         },
1590         {
1591                 .name = "user_linkup_enabled",
1592                 .type = TEAM_OPTION_TYPE_BOOL,
1593                 .per_port = true,
1594                 .getter = team_user_linkup_en_option_get,
1595                 .setter = team_user_linkup_en_option_set,
1596         },
1597         {
1598                 .name = "priority",
1599                 .type = TEAM_OPTION_TYPE_S32,
1600                 .per_port = true,
1601                 .getter = team_priority_option_get,
1602                 .setter = team_priority_option_set,
1603         },
1604         {
1605                 .name = "queue_id",
1606                 .type = TEAM_OPTION_TYPE_U32,
1607                 .per_port = true,
1608                 .getter = team_queue_id_option_get,
1609                 .setter = team_queue_id_option_set,
1610         },
1611 };
1612
1613
1614 static int team_init(struct net_device *dev)
1615 {
1616         struct team *team = netdev_priv(dev);
1617         int i;
1618         int err;
1619
1620         team->dev = dev;
1621         team_set_no_mode(team);
1622         team->notifier_ctx = false;
1623
1624         team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1625         if (!team->pcpu_stats)
1626                 return -ENOMEM;
1627
1628         for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1629                 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1630         INIT_LIST_HEAD(&team->port_list);
1631         err = team_queue_override_init(team);
1632         if (err)
1633                 goto err_team_queue_override_init;
1634
1635         team_adjust_ops(team);
1636
1637         INIT_LIST_HEAD(&team->option_list);
1638         INIT_LIST_HEAD(&team->option_inst_list);
1639
1640         team_notify_peers_init(team);
1641         team_mcast_rejoin_init(team);
1642
1643         err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1644         if (err)
1645                 goto err_options_register;
1646         netif_carrier_off(dev);
1647
1648         lockdep_register_key(&team->team_lock_key);
1649         __mutex_init(&team->lock, "team->team_lock_key", &team->team_lock_key);
1650         netdev_lockdep_set_classes(dev);
1651
1652         return 0;
1653
1654 err_options_register:
1655         team_mcast_rejoin_fini(team);
1656         team_notify_peers_fini(team);
1657         team_queue_override_fini(team);
1658 err_team_queue_override_init:
1659         free_percpu(team->pcpu_stats);
1660
1661         return err;
1662 }
1663
1664 static void team_uninit(struct net_device *dev)
1665 {
1666         struct team *team = netdev_priv(dev);
1667         struct team_port *port;
1668         struct team_port *tmp;
1669
1670         mutex_lock(&team->lock);
1671         list_for_each_entry_safe(port, tmp, &team->port_list, list)
1672                 team_port_del(team, port->dev);
1673
1674         __team_change_mode(team, NULL); /* cleanup */
1675         __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1676         team_mcast_rejoin_fini(team);
1677         team_notify_peers_fini(team);
1678         team_queue_override_fini(team);
1679         mutex_unlock(&team->lock);
1680         netdev_change_features(dev);
1681         lockdep_unregister_key(&team->team_lock_key);
1682 }
1683
1684 static void team_destructor(struct net_device *dev)
1685 {
1686         struct team *team = netdev_priv(dev);
1687
1688         free_percpu(team->pcpu_stats);
1689 }
1690
1691 static int team_open(struct net_device *dev)
1692 {
1693         return 0;
1694 }
1695
1696 static int team_close(struct net_device *dev)
1697 {
1698         struct team *team = netdev_priv(dev);
1699         struct team_port *port;
1700
1701         list_for_each_entry(port, &team->port_list, list) {
1702                 dev_uc_unsync(port->dev, dev);
1703                 dev_mc_unsync(port->dev, dev);
1704         }
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                 u64_stats_inc(&pcpu_stats->tx_packets);
1727                 u64_stats_add(&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                              struct net_device *sb_dev)
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         dev_addr_set(dev, addr->sa_data);
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 void
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(&p->syncp);
1860                         rx_packets      = u64_stats_read(&p->rx_packets);
1861                         rx_bytes        = u64_stats_read(&p->rx_bytes);
1862                         rx_multicast    = u64_stats_read(&p->rx_multicast);
1863                         tx_packets      = u64_stats_read(&p->tx_packets);
1864                         tx_bytes        = u64_stats_read(&p->tx_bytes);
1865                 } while (u64_stats_fetch_retry(&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      += READ_ONCE(p->rx_dropped);
1877                 tx_dropped      += READ_ONCE(p->tx_dropped);
1878                 rx_nohandler    += READ_ONCE(p->rx_nohandler);
1879         }
1880         stats->rx_dropped       = rx_dropped;
1881         stats->tx_dropped       = tx_dropped;
1882         stats->rx_nohandler     = rx_nohandler;
1883 }
1884
1885 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1886 {
1887         struct team *team = netdev_priv(dev);
1888         struct team_port *port;
1889         int err;
1890
1891         /*
1892          * Alhough this is reader, it's guarded by team lock. It's not possible
1893          * to traverse list in reverse under rcu_read_lock
1894          */
1895         mutex_lock(&team->lock);
1896         list_for_each_entry(port, &team->port_list, list) {
1897                 err = vlan_vid_add(port->dev, proto, vid);
1898                 if (err)
1899                         goto unwind;
1900         }
1901         mutex_unlock(&team->lock);
1902
1903         return 0;
1904
1905 unwind:
1906         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1907                 vlan_vid_del(port->dev, proto, vid);
1908         mutex_unlock(&team->lock);
1909
1910         return err;
1911 }
1912
1913 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1914 {
1915         struct team *team = netdev_priv(dev);
1916         struct team_port *port;
1917
1918         mutex_lock(&team->lock);
1919         list_for_each_entry(port, &team->port_list, list)
1920                 vlan_vid_del(port->dev, proto, vid);
1921         mutex_unlock(&team->lock);
1922
1923         return 0;
1924 }
1925
1926 #ifdef CONFIG_NET_POLL_CONTROLLER
1927 static void team_poll_controller(struct net_device *dev)
1928 {
1929 }
1930
1931 static void __team_netpoll_cleanup(struct team *team)
1932 {
1933         struct team_port *port;
1934
1935         list_for_each_entry(port, &team->port_list, list)
1936                 team_port_disable_netpoll(port);
1937 }
1938
1939 static void team_netpoll_cleanup(struct net_device *dev)
1940 {
1941         struct team *team = netdev_priv(dev);
1942
1943         mutex_lock(&team->lock);
1944         __team_netpoll_cleanup(team);
1945         mutex_unlock(&team->lock);
1946 }
1947
1948 static int team_netpoll_setup(struct net_device *dev,
1949                               struct netpoll_info *npifo)
1950 {
1951         struct team *team = netdev_priv(dev);
1952         struct team_port *port;
1953         int err = 0;
1954
1955         mutex_lock(&team->lock);
1956         list_for_each_entry(port, &team->port_list, list) {
1957                 err = __team_port_enable_netpoll(port);
1958                 if (err) {
1959                         __team_netpoll_cleanup(team);
1960                         break;
1961                 }
1962         }
1963         mutex_unlock(&team->lock);
1964         return err;
1965 }
1966 #endif
1967
1968 static int team_add_slave(struct net_device *dev, struct net_device *port_dev,
1969                           struct netlink_ext_ack *extack)
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, extack);
1976         mutex_unlock(&team->lock);
1977
1978         if (!err)
1979                 netdev_change_features(dev);
1980
1981         return err;
1982 }
1983
1984 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1985 {
1986         struct team *team = netdev_priv(dev);
1987         int err;
1988
1989         mutex_lock(&team->lock);
1990         err = team_port_del(team, port_dev);
1991         mutex_unlock(&team->lock);
1992
1993         if (err)
1994                 return err;
1995
1996         if (netif_is_team_master(port_dev)) {
1997                 lockdep_unregister_key(&team->team_lock_key);
1998                 lockdep_register_key(&team->team_lock_key);
1999                 lockdep_set_class(&team->lock, &team->team_lock_key);
2000         }
2001         netdev_change_features(dev);
2002
2003         return err;
2004 }
2005
2006 static netdev_features_t team_fix_features(struct net_device *dev,
2007                                            netdev_features_t features)
2008 {
2009         struct team_port *port;
2010         struct team *team = netdev_priv(dev);
2011         netdev_features_t mask;
2012
2013         mask = features;
2014         features &= ~NETIF_F_ONE_FOR_ALL;
2015         features |= NETIF_F_ALL_FOR_ALL;
2016
2017         rcu_read_lock();
2018         list_for_each_entry_rcu(port, &team->port_list, list) {
2019                 features = netdev_increment_features(features,
2020                                                      port->dev->features,
2021                                                      mask);
2022         }
2023         rcu_read_unlock();
2024
2025         features = netdev_add_tso_features(features, mask);
2026
2027         return features;
2028 }
2029
2030 static int team_change_carrier(struct net_device *dev, bool new_carrier)
2031 {
2032         struct team *team = netdev_priv(dev);
2033
2034         team->user_carrier_enabled = true;
2035
2036         if (new_carrier)
2037                 netif_carrier_on(dev);
2038         else
2039                 netif_carrier_off(dev);
2040         return 0;
2041 }
2042
2043 static const struct net_device_ops team_netdev_ops = {
2044         .ndo_init               = team_init,
2045         .ndo_uninit             = team_uninit,
2046         .ndo_open               = team_open,
2047         .ndo_stop               = team_close,
2048         .ndo_start_xmit         = team_xmit,
2049         .ndo_select_queue       = team_select_queue,
2050         .ndo_change_rx_flags    = team_change_rx_flags,
2051         .ndo_set_rx_mode        = team_set_rx_mode,
2052         .ndo_set_mac_address    = team_set_mac_address,
2053         .ndo_change_mtu         = team_change_mtu,
2054         .ndo_get_stats64        = team_get_stats64,
2055         .ndo_vlan_rx_add_vid    = team_vlan_rx_add_vid,
2056         .ndo_vlan_rx_kill_vid   = team_vlan_rx_kill_vid,
2057 #ifdef CONFIG_NET_POLL_CONTROLLER
2058         .ndo_poll_controller    = team_poll_controller,
2059         .ndo_netpoll_setup      = team_netpoll_setup,
2060         .ndo_netpoll_cleanup    = team_netpoll_cleanup,
2061 #endif
2062         .ndo_add_slave          = team_add_slave,
2063         .ndo_del_slave          = team_del_slave,
2064         .ndo_fix_features       = team_fix_features,
2065         .ndo_change_carrier     = team_change_carrier,
2066         .ndo_features_check     = passthru_features_check,
2067 };
2068
2069 /***********************
2070  * ethtool interface
2071  ***********************/
2072
2073 static void team_ethtool_get_drvinfo(struct net_device *dev,
2074                                      struct ethtool_drvinfo *drvinfo)
2075 {
2076         strscpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
2077         strscpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2078 }
2079
2080 static int team_ethtool_get_link_ksettings(struct net_device *dev,
2081                                            struct ethtool_link_ksettings *cmd)
2082 {
2083         struct team *team= netdev_priv(dev);
2084         unsigned long speed = 0;
2085         struct team_port *port;
2086
2087         cmd->base.duplex = DUPLEX_UNKNOWN;
2088         cmd->base.port = PORT_OTHER;
2089
2090         rcu_read_lock();
2091         list_for_each_entry_rcu(port, &team->port_list, list) {
2092                 if (team_port_txable(port)) {
2093                         if (port->state.speed != SPEED_UNKNOWN)
2094                                 speed += port->state.speed;
2095                         if (cmd->base.duplex == DUPLEX_UNKNOWN &&
2096                             port->state.duplex != DUPLEX_UNKNOWN)
2097                                 cmd->base.duplex = port->state.duplex;
2098                 }
2099         }
2100         rcu_read_unlock();
2101
2102         cmd->base.speed = speed ? : SPEED_UNKNOWN;
2103
2104         return 0;
2105 }
2106
2107 static const struct ethtool_ops team_ethtool_ops = {
2108         .get_drvinfo            = team_ethtool_get_drvinfo,
2109         .get_link               = ethtool_op_get_link,
2110         .get_link_ksettings     = team_ethtool_get_link_ksettings,
2111 };
2112
2113 /***********************
2114  * rt netlink interface
2115  ***********************/
2116
2117 static void team_setup_by_port(struct net_device *dev,
2118                                struct net_device *port_dev)
2119 {
2120         struct team *team = netdev_priv(dev);
2121
2122         if (port_dev->type == ARPHRD_ETHER)
2123                 dev->header_ops = team->header_ops_cache;
2124         else
2125                 dev->header_ops = port_dev->header_ops;
2126         dev->type = port_dev->type;
2127         dev->hard_header_len = port_dev->hard_header_len;
2128         dev->needed_headroom = port_dev->needed_headroom;
2129         dev->addr_len = port_dev->addr_len;
2130         dev->mtu = port_dev->mtu;
2131         memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2132         eth_hw_addr_inherit(dev, port_dev);
2133
2134         if (port_dev->flags & IFF_POINTOPOINT) {
2135                 dev->flags &= ~(IFF_BROADCAST | IFF_MULTICAST);
2136                 dev->flags |= (IFF_POINTOPOINT | IFF_NOARP);
2137         } else if ((port_dev->flags & (IFF_BROADCAST | IFF_MULTICAST)) ==
2138                     (IFF_BROADCAST | IFF_MULTICAST)) {
2139                 dev->flags |= (IFF_BROADCAST | IFF_MULTICAST);
2140                 dev->flags &= ~(IFF_POINTOPOINT | IFF_NOARP);
2141         }
2142 }
2143
2144 static int team_dev_type_check_change(struct net_device *dev,
2145                                       struct net_device *port_dev)
2146 {
2147         struct team *team = netdev_priv(dev);
2148         char *portname = port_dev->name;
2149         int err;
2150
2151         if (dev->type == port_dev->type)
2152                 return 0;
2153         if (!list_empty(&team->port_list)) {
2154                 netdev_err(dev, "Device %s is of different type\n", portname);
2155                 return -EBUSY;
2156         }
2157         err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2158         err = notifier_to_errno(err);
2159         if (err) {
2160                 netdev_err(dev, "Refused to change device type\n");
2161                 return err;
2162         }
2163         dev_uc_flush(dev);
2164         dev_mc_flush(dev);
2165         team_setup_by_port(dev, port_dev);
2166         call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2167         return 0;
2168 }
2169
2170 static void team_setup(struct net_device *dev)
2171 {
2172         struct team *team = netdev_priv(dev);
2173
2174         ether_setup(dev);
2175         dev->max_mtu = ETH_MAX_MTU;
2176         team->header_ops_cache = dev->header_ops;
2177
2178         dev->netdev_ops = &team_netdev_ops;
2179         dev->ethtool_ops = &team_ethtool_ops;
2180         dev->needs_free_netdev = true;
2181         dev->priv_destructor = team_destructor;
2182         dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2183         dev->priv_flags |= IFF_NO_QUEUE;
2184         dev->priv_flags |= IFF_TEAM;
2185
2186         /*
2187          * Indicate we support unicast address filtering. That way core won't
2188          * bring us to promisc mode in case a unicast addr is added.
2189          * Let this up to underlay drivers.
2190          */
2191         dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2192
2193         dev->features |= NETIF_F_LLTX;
2194         dev->features |= NETIF_F_GRO;
2195
2196         /* Don't allow team devices to change network namespaces. */
2197         dev->features |= NETIF_F_NETNS_LOCAL;
2198
2199         dev->hw_features = TEAM_VLAN_FEATURES |
2200                            NETIF_F_HW_VLAN_CTAG_RX |
2201                            NETIF_F_HW_VLAN_CTAG_FILTER |
2202                            NETIF_F_HW_VLAN_STAG_RX |
2203                            NETIF_F_HW_VLAN_STAG_FILTER;
2204
2205         dev->hw_features |= NETIF_F_GSO_ENCAP_ALL;
2206         dev->features |= dev->hw_features;
2207         dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
2208 }
2209
2210 static int team_newlink(struct net *src_net, struct net_device *dev,
2211                         struct nlattr *tb[], struct nlattr *data[],
2212                         struct netlink_ext_ack *extack)
2213 {
2214         if (tb[IFLA_ADDRESS] == NULL)
2215                 eth_hw_addr_random(dev);
2216
2217         return register_netdevice(dev);
2218 }
2219
2220 static int team_validate(struct nlattr *tb[], struct nlattr *data[],
2221                          struct netlink_ext_ack *extack)
2222 {
2223         if (tb[IFLA_ADDRESS]) {
2224                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2225                         return -EINVAL;
2226                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2227                         return -EADDRNOTAVAIL;
2228         }
2229         return 0;
2230 }
2231
2232 static unsigned int team_get_num_tx_queues(void)
2233 {
2234         return TEAM_DEFAULT_NUM_TX_QUEUES;
2235 }
2236
2237 static unsigned int team_get_num_rx_queues(void)
2238 {
2239         return TEAM_DEFAULT_NUM_RX_QUEUES;
2240 }
2241
2242 static struct rtnl_link_ops team_link_ops __read_mostly = {
2243         .kind                   = DRV_NAME,
2244         .priv_size              = sizeof(struct team),
2245         .setup                  = team_setup,
2246         .newlink                = team_newlink,
2247         .validate               = team_validate,
2248         .get_num_tx_queues      = team_get_num_tx_queues,
2249         .get_num_rx_queues      = team_get_num_rx_queues,
2250 };
2251
2252
2253 /***********************************
2254  * Generic netlink custom interface
2255  ***********************************/
2256
2257 static struct genl_family team_nl_family;
2258
2259 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2260         [TEAM_ATTR_UNSPEC]                      = { .type = NLA_UNSPEC, },
2261         [TEAM_ATTR_TEAM_IFINDEX]                = { .type = NLA_U32 },
2262         [TEAM_ATTR_LIST_OPTION]                 = { .type = NLA_NESTED },
2263         [TEAM_ATTR_LIST_PORT]                   = { .type = NLA_NESTED },
2264 };
2265
2266 static const struct nla_policy
2267 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2268         [TEAM_ATTR_OPTION_UNSPEC]               = { .type = NLA_UNSPEC, },
2269         [TEAM_ATTR_OPTION_NAME] = {
2270                 .type = NLA_STRING,
2271                 .len = TEAM_STRING_MAX_LEN,
2272         },
2273         [TEAM_ATTR_OPTION_CHANGED]              = { .type = NLA_FLAG },
2274         [TEAM_ATTR_OPTION_TYPE]                 = { .type = NLA_U8 },
2275         [TEAM_ATTR_OPTION_DATA]                 = { .type = NLA_BINARY },
2276         [TEAM_ATTR_OPTION_PORT_IFINDEX]         = { .type = NLA_U32 },
2277         [TEAM_ATTR_OPTION_ARRAY_INDEX]          = { .type = NLA_U32 },
2278 };
2279
2280 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2281 {
2282         struct sk_buff *msg;
2283         void *hdr;
2284         int err;
2285
2286         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2287         if (!msg)
2288                 return -ENOMEM;
2289
2290         hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2291                           &team_nl_family, 0, TEAM_CMD_NOOP);
2292         if (!hdr) {
2293                 err = -EMSGSIZE;
2294                 goto err_msg_put;
2295         }
2296
2297         genlmsg_end(msg, hdr);
2298
2299         return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2300
2301 err_msg_put:
2302         nlmsg_free(msg);
2303
2304         return err;
2305 }
2306
2307 /*
2308  * Netlink cmd functions should be locked by following two functions.
2309  * Since dev gets held here, that ensures dev won't disappear in between.
2310  */
2311 static struct team *team_nl_team_get(struct genl_info *info)
2312 {
2313         struct net *net = genl_info_net(info);
2314         int ifindex;
2315         struct net_device *dev;
2316         struct team *team;
2317
2318         if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2319                 return NULL;
2320
2321         ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2322         dev = dev_get_by_index(net, ifindex);
2323         if (!dev || dev->netdev_ops != &team_netdev_ops) {
2324                 dev_put(dev);
2325                 return NULL;
2326         }
2327
2328         team = netdev_priv(dev);
2329         mutex_lock(&team->lock);
2330         return team;
2331 }
2332
2333 static void team_nl_team_put(struct team *team)
2334 {
2335         mutex_unlock(&team->lock);
2336         dev_put(team->dev);
2337 }
2338
2339 typedef int team_nl_send_func_t(struct sk_buff *skb,
2340                                 struct team *team, u32 portid);
2341
2342 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2343 {
2344         return genlmsg_unicast(dev_net(team->dev), skb, portid);
2345 }
2346
2347 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2348                                        struct team_option_inst *opt_inst)
2349 {
2350         struct nlattr *option_item;
2351         struct team_option *option = opt_inst->option;
2352         struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2353         struct team_gsetter_ctx ctx;
2354         int err;
2355
2356         ctx.info = opt_inst_info;
2357         err = team_option_get(team, opt_inst, &ctx);
2358         if (err)
2359                 return err;
2360
2361         option_item = nla_nest_start_noflag(skb, TEAM_ATTR_ITEM_OPTION);
2362         if (!option_item)
2363                 return -EMSGSIZE;
2364
2365         if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2366                 goto nest_cancel;
2367         if (opt_inst_info->port &&
2368             nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2369                         opt_inst_info->port->dev->ifindex))
2370                 goto nest_cancel;
2371         if (opt_inst->option->array_size &&
2372             nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2373                         opt_inst_info->array_index))
2374                 goto nest_cancel;
2375
2376         switch (option->type) {
2377         case TEAM_OPTION_TYPE_U32:
2378                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2379                         goto nest_cancel;
2380                 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2381                         goto nest_cancel;
2382                 break;
2383         case TEAM_OPTION_TYPE_STRING:
2384                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2385                         goto nest_cancel;
2386                 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2387                                    ctx.data.str_val))
2388                         goto nest_cancel;
2389                 break;
2390         case TEAM_OPTION_TYPE_BINARY:
2391                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2392                         goto nest_cancel;
2393                 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2394                             ctx.data.bin_val.ptr))
2395                         goto nest_cancel;
2396                 break;
2397         case TEAM_OPTION_TYPE_BOOL:
2398                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2399                         goto nest_cancel;
2400                 if (ctx.data.bool_val &&
2401                     nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2402                         goto nest_cancel;
2403                 break;
2404         case TEAM_OPTION_TYPE_S32:
2405                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2406                         goto nest_cancel;
2407                 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2408                         goto nest_cancel;
2409                 break;
2410         default:
2411                 BUG();
2412         }
2413         if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2414                 goto nest_cancel;
2415         if (opt_inst->changed) {
2416                 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2417                         goto nest_cancel;
2418                 opt_inst->changed = false;
2419         }
2420         nla_nest_end(skb, option_item);
2421         return 0;
2422
2423 nest_cancel:
2424         nla_nest_cancel(skb, option_item);
2425         return -EMSGSIZE;
2426 }
2427
2428 static int __send_and_alloc_skb(struct sk_buff **pskb,
2429                                 struct team *team, u32 portid,
2430                                 team_nl_send_func_t *send_func)
2431 {
2432         int err;
2433
2434         if (*pskb) {
2435                 err = send_func(*pskb, team, portid);
2436                 if (err)
2437                         return err;
2438         }
2439         *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2440         if (!*pskb)
2441                 return -ENOMEM;
2442         return 0;
2443 }
2444
2445 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2446                                     int flags, team_nl_send_func_t *send_func,
2447                                     struct list_head *sel_opt_inst_list)
2448 {
2449         struct nlattr *option_list;
2450         struct nlmsghdr *nlh;
2451         void *hdr;
2452         struct team_option_inst *opt_inst;
2453         int err;
2454         struct sk_buff *skb = NULL;
2455         bool incomplete;
2456         int i;
2457
2458         opt_inst = list_first_entry(sel_opt_inst_list,
2459                                     struct team_option_inst, tmp_list);
2460
2461 start_again:
2462         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2463         if (err)
2464                 return err;
2465
2466         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2467                           TEAM_CMD_OPTIONS_GET);
2468         if (!hdr) {
2469                 nlmsg_free(skb);
2470                 return -EMSGSIZE;
2471         }
2472
2473         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2474                 goto nla_put_failure;
2475         option_list = nla_nest_start_noflag(skb, TEAM_ATTR_LIST_OPTION);
2476         if (!option_list)
2477                 goto nla_put_failure;
2478
2479         i = 0;
2480         incomplete = false;
2481         list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2482                 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2483                 if (err) {
2484                         if (err == -EMSGSIZE) {
2485                                 if (!i)
2486                                         goto errout;
2487                                 incomplete = true;
2488                                 break;
2489                         }
2490                         goto errout;
2491                 }
2492                 i++;
2493         }
2494
2495         nla_nest_end(skb, option_list);
2496         genlmsg_end(skb, hdr);
2497         if (incomplete)
2498                 goto start_again;
2499
2500 send_done:
2501         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2502         if (!nlh) {
2503                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2504                 if (err)
2505                         return err;
2506                 goto send_done;
2507         }
2508
2509         return send_func(skb, team, portid);
2510
2511 nla_put_failure:
2512         err = -EMSGSIZE;
2513 errout:
2514         nlmsg_free(skb);
2515         return err;
2516 }
2517
2518 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2519 {
2520         struct team *team;
2521         struct team_option_inst *opt_inst;
2522         int err;
2523         LIST_HEAD(sel_opt_inst_list);
2524
2525         team = team_nl_team_get(info);
2526         if (!team)
2527                 return -EINVAL;
2528
2529         list_for_each_entry(opt_inst, &team->option_inst_list, list)
2530                 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2531         err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2532                                        NLM_F_ACK, team_nl_send_unicast,
2533                                        &sel_opt_inst_list);
2534
2535         team_nl_team_put(team);
2536
2537         return err;
2538 }
2539
2540 static int team_nl_send_event_options_get(struct team *team,
2541                                           struct list_head *sel_opt_inst_list);
2542
2543 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2544 {
2545         struct team *team;
2546         int err = 0;
2547         int i;
2548         struct nlattr *nl_option;
2549
2550         rtnl_lock();
2551
2552         team = team_nl_team_get(info);
2553         if (!team) {
2554                 err = -EINVAL;
2555                 goto rtnl_unlock;
2556         }
2557
2558         err = -EINVAL;
2559         if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2560                 err = -EINVAL;
2561                 goto team_put;
2562         }
2563
2564         nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2565                 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2566                 struct nlattr *attr;
2567                 struct nlattr *attr_data;
2568                 LIST_HEAD(opt_inst_list);
2569                 enum team_option_type opt_type;
2570                 int opt_port_ifindex = 0; /* != 0 for per-port options */
2571                 u32 opt_array_index = 0;
2572                 bool opt_is_array = false;
2573                 struct team_option_inst *opt_inst;
2574                 char *opt_name;
2575                 bool opt_found = false;
2576
2577                 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2578                         err = -EINVAL;
2579                         goto team_put;
2580                 }
2581                 err = nla_parse_nested_deprecated(opt_attrs,
2582                                                   TEAM_ATTR_OPTION_MAX,
2583                                                   nl_option,
2584                                                   team_nl_option_policy,
2585                                                   info->extack);
2586                 if (err)
2587                         goto team_put;
2588                 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2589                     !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2590                         err = -EINVAL;
2591                         goto team_put;
2592                 }
2593                 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2594                 case NLA_U32:
2595                         opt_type = TEAM_OPTION_TYPE_U32;
2596                         break;
2597                 case NLA_STRING:
2598                         opt_type = TEAM_OPTION_TYPE_STRING;
2599                         break;
2600                 case NLA_BINARY:
2601                         opt_type = TEAM_OPTION_TYPE_BINARY;
2602                         break;
2603                 case NLA_FLAG:
2604                         opt_type = TEAM_OPTION_TYPE_BOOL;
2605                         break;
2606                 case NLA_S32:
2607                         opt_type = TEAM_OPTION_TYPE_S32;
2608                         break;
2609                 default:
2610                         goto team_put;
2611                 }
2612
2613                 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2614                 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2615                         err = -EINVAL;
2616                         goto team_put;
2617                 }
2618
2619                 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2620                 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2621                 if (attr)
2622                         opt_port_ifindex = nla_get_u32(attr);
2623
2624                 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2625                 if (attr) {
2626                         opt_is_array = true;
2627                         opt_array_index = nla_get_u32(attr);
2628                 }
2629
2630                 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2631                         struct team_option *option = opt_inst->option;
2632                         struct team_gsetter_ctx ctx;
2633                         struct team_option_inst_info *opt_inst_info;
2634                         int tmp_ifindex;
2635
2636                         opt_inst_info = &opt_inst->info;
2637                         tmp_ifindex = opt_inst_info->port ?
2638                                       opt_inst_info->port->dev->ifindex : 0;
2639                         if (option->type != opt_type ||
2640                             strcmp(option->name, opt_name) ||
2641                             tmp_ifindex != opt_port_ifindex ||
2642                             (option->array_size && !opt_is_array) ||
2643                             opt_inst_info->array_index != opt_array_index)
2644                                 continue;
2645                         opt_found = true;
2646                         ctx.info = opt_inst_info;
2647                         switch (opt_type) {
2648                         case TEAM_OPTION_TYPE_U32:
2649                                 ctx.data.u32_val = nla_get_u32(attr_data);
2650                                 break;
2651                         case TEAM_OPTION_TYPE_STRING:
2652                                 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2653                                         err = -EINVAL;
2654                                         goto team_put;
2655                                 }
2656                                 ctx.data.str_val = nla_data(attr_data);
2657                                 break;
2658                         case TEAM_OPTION_TYPE_BINARY:
2659                                 ctx.data.bin_val.len = nla_len(attr_data);
2660                                 ctx.data.bin_val.ptr = nla_data(attr_data);
2661                                 break;
2662                         case TEAM_OPTION_TYPE_BOOL:
2663                                 ctx.data.bool_val = attr_data ? true : false;
2664                                 break;
2665                         case TEAM_OPTION_TYPE_S32:
2666                                 ctx.data.s32_val = nla_get_s32(attr_data);
2667                                 break;
2668                         default:
2669                                 BUG();
2670                         }
2671                         err = team_option_set(team, opt_inst, &ctx);
2672                         if (err)
2673                                 goto team_put;
2674                         opt_inst->changed = true;
2675                         list_add(&opt_inst->tmp_list, &opt_inst_list);
2676                 }
2677                 if (!opt_found) {
2678                         err = -ENOENT;
2679                         goto team_put;
2680                 }
2681
2682                 err = team_nl_send_event_options_get(team, &opt_inst_list);
2683                 if (err)
2684                         break;
2685         }
2686
2687 team_put:
2688         team_nl_team_put(team);
2689 rtnl_unlock:
2690         rtnl_unlock();
2691         return err;
2692 }
2693
2694 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2695                                      struct team_port *port)
2696 {
2697         struct nlattr *port_item;
2698
2699         port_item = nla_nest_start_noflag(skb, TEAM_ATTR_ITEM_PORT);
2700         if (!port_item)
2701                 goto nest_cancel;
2702         if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2703                 goto nest_cancel;
2704         if (port->changed) {
2705                 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2706                         goto nest_cancel;
2707                 port->changed = false;
2708         }
2709         if ((port->removed &&
2710              nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2711             (port->state.linkup &&
2712              nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2713             nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2714             nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2715                 goto nest_cancel;
2716         nla_nest_end(skb, port_item);
2717         return 0;
2718
2719 nest_cancel:
2720         nla_nest_cancel(skb, port_item);
2721         return -EMSGSIZE;
2722 }
2723
2724 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2725                                       int flags, team_nl_send_func_t *send_func,
2726                                       struct team_port *one_port)
2727 {
2728         struct nlattr *port_list;
2729         struct nlmsghdr *nlh;
2730         void *hdr;
2731         struct team_port *port;
2732         int err;
2733         struct sk_buff *skb = NULL;
2734         bool incomplete;
2735         int i;
2736
2737         port = list_first_entry_or_null(&team->port_list,
2738                                         struct team_port, list);
2739
2740 start_again:
2741         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2742         if (err)
2743                 return err;
2744
2745         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2746                           TEAM_CMD_PORT_LIST_GET);
2747         if (!hdr) {
2748                 nlmsg_free(skb);
2749                 return -EMSGSIZE;
2750         }
2751
2752         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2753                 goto nla_put_failure;
2754         port_list = nla_nest_start_noflag(skb, TEAM_ATTR_LIST_PORT);
2755         if (!port_list)
2756                 goto nla_put_failure;
2757
2758         i = 0;
2759         incomplete = false;
2760
2761         /* If one port is selected, called wants to send port list containing
2762          * only this port. Otherwise go through all listed ports and send all
2763          */
2764         if (one_port) {
2765                 err = team_nl_fill_one_port_get(skb, one_port);
2766                 if (err)
2767                         goto errout;
2768         } else if (port) {
2769                 list_for_each_entry_from(port, &team->port_list, list) {
2770                         err = team_nl_fill_one_port_get(skb, port);
2771                         if (err) {
2772                                 if (err == -EMSGSIZE) {
2773                                         if (!i)
2774                                                 goto errout;
2775                                         incomplete = true;
2776                                         break;
2777                                 }
2778                                 goto errout;
2779                         }
2780                         i++;
2781                 }
2782         }
2783
2784         nla_nest_end(skb, port_list);
2785         genlmsg_end(skb, hdr);
2786         if (incomplete)
2787                 goto start_again;
2788
2789 send_done:
2790         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2791         if (!nlh) {
2792                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2793                 if (err)
2794                         return err;
2795                 goto send_done;
2796         }
2797
2798         return send_func(skb, team, portid);
2799
2800 nla_put_failure:
2801         err = -EMSGSIZE;
2802 errout:
2803         nlmsg_free(skb);
2804         return err;
2805 }
2806
2807 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2808                                      struct genl_info *info)
2809 {
2810         struct team *team;
2811         int err;
2812
2813         team = team_nl_team_get(info);
2814         if (!team)
2815                 return -EINVAL;
2816
2817         err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2818                                          NLM_F_ACK, team_nl_send_unicast, NULL);
2819
2820         team_nl_team_put(team);
2821
2822         return err;
2823 }
2824
2825 static const struct genl_small_ops team_nl_ops[] = {
2826         {
2827                 .cmd = TEAM_CMD_NOOP,
2828                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2829                 .doit = team_nl_cmd_noop,
2830         },
2831         {
2832                 .cmd = TEAM_CMD_OPTIONS_SET,
2833                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2834                 .doit = team_nl_cmd_options_set,
2835                 .flags = GENL_ADMIN_PERM,
2836         },
2837         {
2838                 .cmd = TEAM_CMD_OPTIONS_GET,
2839                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2840                 .doit = team_nl_cmd_options_get,
2841                 .flags = GENL_ADMIN_PERM,
2842         },
2843         {
2844                 .cmd = TEAM_CMD_PORT_LIST_GET,
2845                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2846                 .doit = team_nl_cmd_port_list_get,
2847                 .flags = GENL_ADMIN_PERM,
2848         },
2849 };
2850
2851 static const struct genl_multicast_group team_nl_mcgrps[] = {
2852         { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2853 };
2854
2855 static struct genl_family team_nl_family __ro_after_init = {
2856         .name           = TEAM_GENL_NAME,
2857         .version        = TEAM_GENL_VERSION,
2858         .maxattr        = TEAM_ATTR_MAX,
2859         .policy = team_nl_policy,
2860         .netnsok        = true,
2861         .module         = THIS_MODULE,
2862         .small_ops      = team_nl_ops,
2863         .n_small_ops    = ARRAY_SIZE(team_nl_ops),
2864         .resv_start_op  = TEAM_CMD_PORT_LIST_GET + 1,
2865         .mcgrps         = team_nl_mcgrps,
2866         .n_mcgrps       = ARRAY_SIZE(team_nl_mcgrps),
2867 };
2868
2869 static int team_nl_send_multicast(struct sk_buff *skb,
2870                                   struct team *team, u32 portid)
2871 {
2872         return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2873                                        skb, 0, 0, GFP_KERNEL);
2874 }
2875
2876 static int team_nl_send_event_options_get(struct team *team,
2877                                           struct list_head *sel_opt_inst_list)
2878 {
2879         return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2880                                         sel_opt_inst_list);
2881 }
2882
2883 static int team_nl_send_event_port_get(struct team *team,
2884                                        struct team_port *port)
2885 {
2886         return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2887                                           port);
2888 }
2889
2890 static int __init team_nl_init(void)
2891 {
2892         return genl_register_family(&team_nl_family);
2893 }
2894
2895 static void __exit team_nl_fini(void)
2896 {
2897         genl_unregister_family(&team_nl_family);
2898 }
2899
2900
2901 /******************
2902  * Change checkers
2903  ******************/
2904
2905 static void __team_options_change_check(struct team *team)
2906 {
2907         int err;
2908         struct team_option_inst *opt_inst;
2909         LIST_HEAD(sel_opt_inst_list);
2910
2911         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2912                 if (opt_inst->changed)
2913                         list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2914         }
2915         err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2916         if (err && err != -ESRCH)
2917                 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2918                             err);
2919 }
2920
2921 /* rtnl lock is held */
2922
2923 static void __team_port_change_send(struct team_port *port, bool linkup)
2924 {
2925         int err;
2926
2927         port->changed = true;
2928         port->state.linkup = linkup;
2929         team_refresh_port_linkup(port);
2930         if (linkup) {
2931                 struct ethtool_link_ksettings ecmd;
2932
2933                 err = __ethtool_get_link_ksettings(port->dev, &ecmd);
2934                 if (!err) {
2935                         port->state.speed = ecmd.base.speed;
2936                         port->state.duplex = ecmd.base.duplex;
2937                         goto send_event;
2938                 }
2939         }
2940         port->state.speed = 0;
2941         port->state.duplex = 0;
2942
2943 send_event:
2944         err = team_nl_send_event_port_get(port->team, port);
2945         if (err && err != -ESRCH)
2946                 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2947                             port->dev->name, err);
2948
2949 }
2950
2951 static void __team_carrier_check(struct team *team)
2952 {
2953         struct team_port *port;
2954         bool team_linkup;
2955
2956         if (team->user_carrier_enabled)
2957                 return;
2958
2959         team_linkup = false;
2960         list_for_each_entry(port, &team->port_list, list) {
2961                 if (port->linkup) {
2962                         team_linkup = true;
2963                         break;
2964                 }
2965         }
2966
2967         if (team_linkup)
2968                 netif_carrier_on(team->dev);
2969         else
2970                 netif_carrier_off(team->dev);
2971 }
2972
2973 static void __team_port_change_check(struct team_port *port, bool linkup)
2974 {
2975         if (port->state.linkup != linkup)
2976                 __team_port_change_send(port, linkup);
2977         __team_carrier_check(port->team);
2978 }
2979
2980 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2981 {
2982         __team_port_change_send(port, linkup);
2983         __team_carrier_check(port->team);
2984 }
2985
2986 static void __team_port_change_port_removed(struct team_port *port)
2987 {
2988         port->removed = true;
2989         __team_port_change_send(port, false);
2990         __team_carrier_check(port->team);
2991 }
2992
2993 static void team_port_change_check(struct team_port *port, bool linkup)
2994 {
2995         struct team *team = port->team;
2996
2997         mutex_lock(&team->lock);
2998         __team_port_change_check(port, linkup);
2999         mutex_unlock(&team->lock);
3000 }
3001
3002
3003 /************************************
3004  * Net device notifier event handler
3005  ************************************/
3006
3007 static int team_device_event(struct notifier_block *unused,
3008                              unsigned long event, void *ptr)
3009 {
3010         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
3011         struct team_port *port;
3012
3013         port = team_port_get_rtnl(dev);
3014         if (!port)
3015                 return NOTIFY_DONE;
3016
3017         switch (event) {
3018         case NETDEV_UP:
3019                 if (netif_oper_up(dev))
3020                         team_port_change_check(port, true);
3021                 break;
3022         case NETDEV_DOWN:
3023                 team_port_change_check(port, false);
3024                 break;
3025         case NETDEV_CHANGE:
3026                 if (netif_running(port->dev))
3027                         team_port_change_check(port,
3028                                                !!netif_oper_up(port->dev));
3029                 break;
3030         case NETDEV_UNREGISTER:
3031                 team_del_slave(port->team->dev, dev);
3032                 break;
3033         case NETDEV_FEAT_CHANGE:
3034                 if (!port->team->notifier_ctx) {
3035                         port->team->notifier_ctx = true;
3036                         team_compute_features(port->team);
3037                         port->team->notifier_ctx = false;
3038                 }
3039                 break;
3040         case NETDEV_PRECHANGEMTU:
3041                 /* Forbid to change mtu of underlaying device */
3042                 if (!port->team->port_mtu_change_allowed)
3043                         return NOTIFY_BAD;
3044                 break;
3045         case NETDEV_PRE_TYPE_CHANGE:
3046                 /* Forbid to change type of underlaying device */
3047                 return NOTIFY_BAD;
3048         case NETDEV_RESEND_IGMP:
3049                 /* Propagate to master device */
3050                 call_netdevice_notifiers(event, port->team->dev);
3051                 break;
3052         }
3053         return NOTIFY_DONE;
3054 }
3055
3056 static struct notifier_block team_notifier_block __read_mostly = {
3057         .notifier_call = team_device_event,
3058 };
3059
3060
3061 /***********************
3062  * Module init and exit
3063  ***********************/
3064
3065 static int __init team_module_init(void)
3066 {
3067         int err;
3068
3069         register_netdevice_notifier(&team_notifier_block);
3070
3071         err = rtnl_link_register(&team_link_ops);
3072         if (err)
3073                 goto err_rtnl_reg;
3074
3075         err = team_nl_init();
3076         if (err)
3077                 goto err_nl_init;
3078
3079         return 0;
3080
3081 err_nl_init:
3082         rtnl_link_unregister(&team_link_ops);
3083
3084 err_rtnl_reg:
3085         unregister_netdevice_notifier(&team_notifier_block);
3086
3087         return err;
3088 }
3089
3090 static void __exit team_module_exit(void)
3091 {
3092         team_nl_fini();
3093         rtnl_link_unregister(&team_link_ops);
3094         unregister_netdevice_notifier(&team_notifier_block);
3095 }
3096
3097 module_init(team_module_init);
3098 module_exit(team_module_exit);
3099
3100 MODULE_LICENSE("GPL v2");
3101 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
3102 MODULE_DESCRIPTION("Ethernet team device driver");
3103 MODULE_ALIAS_RTNL_LINK(DRV_NAME);