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         int err;
 153
 154         array_size = option->array_size;
 155         if (!array_size)
 156                 array_size = 1; /* No array but still need one instance */
 157
 158         for (i = 0; i < array_size; i++) {
 159                 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL);
 160                 if (!opt_inst)
 161                         return -ENOMEM;
 162                 opt_inst->option = option;
 163                 opt_inst->info.port = port;
 164                 opt_inst->info.array_index = i;
 165                 opt_inst->changed = true;
 166                 opt_inst->removed = false;
 167                 list_add_tail(&opt_inst->list, &team->option_inst_list);
 168                 if (option->init) {
 169                         err = option->init(team, &opt_inst->info);
 170                         if (err)
 171                                 return err;
 172                 }
 173
 174         }
 175         return 0;
 176 }
 177
 178 static int __team_option_inst_add_option(struct team *team,
 179                                          struct team_option *option)
 180 {
 181         int err;
 182
 183         if (!option->per_port) {
 184                 err = __team_option_inst_add(team, option, NULL);
 185                 if (err)
 186                         goto inst_del_option;
 187         }
 188         return 0;
 189
 190 inst_del_option:
 191         __team_option_inst_del_option(team, option);
 192         return err;
 193 }
 194
 195 static void __team_option_inst_mark_removed_option(struct team *team,
 196                                                    struct team_option *option)
 197 {
 198         struct team_option_inst *opt_inst;
 199
 200         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 201                 if (opt_inst->option == option) {
 202                         opt_inst->changed = true;
 203                         opt_inst->removed = true;
 204                 }
 205         }
 206 }
 207
 208 static void __team_option_inst_del_port(struct team *team,
 209                                         struct team_port *port)
 210 {
 211         struct team_option_inst *opt_inst, *tmp;
 212
 213         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 214                 if (opt_inst->option->per_port &&
 215                     opt_inst->info.port == port)
 216                         __team_option_inst_del(opt_inst);
 217         }
 218 }
 219
 220 static int __team_option_inst_add_port(struct team *team,
 221                                        struct team_port *port)
 222 {
 223         struct team_option *option;
 224         int err;
 225
 226         list_for_each_entry(option, &team->option_list, list) {
 227                 if (!option->per_port)
 228                         continue;
 229                 err = __team_option_inst_add(team, option, port);
 230                 if (err)
 231                         goto inst_del_port;
 232         }
 233         return 0;
 234
 235 inst_del_port:
 236         __team_option_inst_del_port(team, port);
 237         return err;
 238 }
 239
 240 static void __team_option_inst_mark_removed_port(struct team *team,
 241                                                  struct team_port *port)
 242 {
 243         struct team_option_inst *opt_inst;
 244
 245         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 246                 if (opt_inst->info.port == port) {
 247                         opt_inst->changed = true;
 248                         opt_inst->removed = true;
 249                 }
 250         }
 251 }
 252
 253 static int __team_options_register(struct team *team,
 254                                    const struct team_option *option,
 255                                    size_t option_count)
 256 {
 257         int i;
 258         struct team_option **dst_opts;
 259         int err;
 260
 261         dst_opts = kcalloc(option_count, sizeof(struct team_option *),
 262                            GFP_KERNEL);
 263         if (!dst_opts)
 264                 return -ENOMEM;
 265         for (i = 0; i < option_count; i++, option++) {
 266                 if (__team_find_option(team, option->name)) {
 267                         err = -EEXIST;
 268                         goto alloc_rollback;
 269                 }
 270                 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
 271                 if (!dst_opts[i]) {
 272                         err = -ENOMEM;
 273                         goto alloc_rollback;
 274                 }
 275         }
 276
 277         for (i = 0; i < option_count; i++) {
 278                 err = __team_option_inst_add_option(team, dst_opts[i]);
 279                 if (err)
 280                         goto inst_rollback;
 281                 list_add_tail(&dst_opts[i]->list, &team->option_list);
 282         }
 283
 284         kfree(dst_opts);
 285         return 0;
 286
 287 inst_rollback:
 288         for (i--; i >= 0; i--)
 289                 __team_option_inst_del_option(team, dst_opts[i]);
 290
 291         i = option_count;
 292 alloc_rollback:
 293         for (i--; i >= 0; i--)
 294                 kfree(dst_opts[i]);
 295
 296         kfree(dst_opts);
 297         return err;
 298 }
 299
 300 static void __team_options_mark_removed(struct team *team,
 301                                         const struct team_option *option,
 302                                         size_t option_count)
 303 {
 304         int i;
 305
 306         for (i = 0; i < option_count; i++, option++) {
 307                 struct team_option *del_opt;
 308
 309                 del_opt = __team_find_option(team, option->name);
 310                 if (del_opt)
 311                         __team_option_inst_mark_removed_option(team, del_opt);
 312         }
 313 }
 314
 315 static void __team_options_unregister(struct team *team,
 316                                       const struct team_option *option,
 317                                       size_t option_count)
 318 {
 319         int i;
 320
 321         for (i = 0; i < option_count; i++, option++) {
 322                 struct team_option *del_opt;
 323
 324                 del_opt = __team_find_option(team, option->name);
 325                 if (del_opt) {
 326                         __team_option_inst_del_option(team, del_opt);
 327                         list_del(&del_opt->list);
 328                         kfree(del_opt);
 329                 }
 330         }
 331 }
 332
 333 static void __team_options_change_check(struct team *team);
 334
 335 int team_options_register(struct team *team,
 336                           const struct team_option *option,
 337                           size_t option_count)
 338 {
 339         int err;
 340
 341         err = __team_options_register(team, option, option_count);
 342         if (err)
 343                 return err;
 344         __team_options_change_check(team);
 345         return 0;
 346 }
 347 EXPORT_SYMBOL(team_options_register);
 348
 349 void team_options_unregister(struct team *team,
 350                              const struct team_option *option,
 351                              size_t option_count)
 352 {
 353         __team_options_mark_removed(team, option, option_count);
 354         __team_options_change_check(team);
 355         __team_options_unregister(team, option, option_count);
 356 }
 357 EXPORT_SYMBOL(team_options_unregister);
 358
 359 static int team_option_get(struct team *team,
 360                            struct team_option_inst *opt_inst,
 361                            struct team_gsetter_ctx *ctx)
 362 {
 363         if (!opt_inst->option->getter)
 364                 return -EOPNOTSUPP;
 365         return opt_inst->option->getter(team, ctx);
 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         port->dev->priv_flags |= IFF_NO_ADDRCONF;
1048
1049         return 0;
1050
1051 err_port_enter:
1052         dev_put(team->dev);
1053
1054         return err;
1055 }
1056
1057 static void team_port_leave(struct team *team, struct team_port *port)
1058 {
1059         if (team->ops.port_leave)
1060                 team->ops.port_leave(team, port);
1061         port->dev->priv_flags &= ~IFF_NO_ADDRCONF;
1062         dev_put(team->dev);
1063 }
1064
1065 #ifdef CONFIG_NET_POLL_CONTROLLER
1066 static int __team_port_enable_netpoll(struct team_port *port)
1067 {
1068         struct netpoll *np;
1069         int err;
1070
1071         np = kzalloc(sizeof(*np), GFP_KERNEL);
1072         if (!np)
1073                 return -ENOMEM;
1074
1075         err = __netpoll_setup(np, port->dev);
1076         if (err) {
1077                 kfree(np);
1078                 return err;
1079         }
1080         port->np = np;
1081         return err;
1082 }
1083
1084 static int team_port_enable_netpoll(struct team_port *port)
1085 {
1086         if (!port->team->dev->npinfo)
1087                 return 0;
1088
1089         return __team_port_enable_netpoll(port);
1090 }
1091
1092 static void team_port_disable_netpoll(struct team_port *port)
1093 {
1094         struct netpoll *np = port->np;
1095
1096         if (!np)
1097                 return;
1098         port->np = NULL;
1099
1100         __netpoll_free(np);
1101 }
1102 #else
1103 static int team_port_enable_netpoll(struct team_port *port)
1104 {
1105         return 0;
1106 }
1107 static void team_port_disable_netpoll(struct team_port *port)
1108 {
1109 }
1110 #endif
1111
1112 static int team_upper_dev_link(struct team *team, struct team_port *port,
1113                                struct netlink_ext_ack *extack)
1114 {
1115         struct netdev_lag_upper_info lag_upper_info;
1116         int err;
1117
1118         lag_upper_info.tx_type = team->mode->lag_tx_type;
1119         lag_upper_info.hash_type = NETDEV_LAG_HASH_UNKNOWN;
1120         err = netdev_master_upper_dev_link(port->dev, team->dev, NULL,
1121                                            &lag_upper_info, extack);
1122         if (err)
1123                 return err;
1124         port->dev->priv_flags |= IFF_TEAM_PORT;
1125         return 0;
1126 }
1127
1128 static void team_upper_dev_unlink(struct team *team, struct team_port *port)
1129 {
1130         netdev_upper_dev_unlink(port->dev, team->dev);
1131         port->dev->priv_flags &= ~IFF_TEAM_PORT;
1132 }
1133
1134 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1135 static int team_dev_type_check_change(struct net_device *dev,
1136                                       struct net_device *port_dev);
1137
1138 static int team_port_add(struct team *team, struct net_device *port_dev,
1139                          struct netlink_ext_ack *extack)
1140 {
1141         struct net_device *dev = team->dev;
1142         struct team_port *port;
1143         char *portname = port_dev->name;
1144         int err;
1145
1146         if (port_dev->flags & IFF_LOOPBACK) {
1147                 NL_SET_ERR_MSG(extack, "Loopback device can't be added as a team port");
1148                 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1149                            portname);
1150                 return -EINVAL;
1151         }
1152
1153         if (netif_is_team_port(port_dev)) {
1154                 NL_SET_ERR_MSG(extack, "Device is already a port of a team device");
1155                 netdev_err(dev, "Device %s is already a port "
1156                                 "of a team device\n", portname);
1157                 return -EBUSY;
1158         }
1159
1160         if (dev == port_dev) {
1161                 NL_SET_ERR_MSG(extack, "Cannot enslave team device to itself");
1162                 netdev_err(dev, "Cannot enslave team device to itself\n");
1163                 return -EINVAL;
1164         }
1165
1166         if (netdev_has_upper_dev(dev, port_dev)) {
1167                 NL_SET_ERR_MSG(extack, "Device is already an upper device of the team interface");
1168                 netdev_err(dev, "Device %s is already an upper device of the team interface\n",
1169                            portname);
1170                 return -EBUSY;
1171         }
1172
1173         if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1174             vlan_uses_dev(dev)) {
1175                 NL_SET_ERR_MSG(extack, "Device is VLAN challenged and team device has VLAN set up");
1176                 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1177                            portname);
1178                 return -EPERM;
1179         }
1180
1181         err = team_dev_type_check_change(dev, port_dev);
1182         if (err)
1183                 return err;
1184
1185         if (port_dev->flags & IFF_UP) {
1186                 NL_SET_ERR_MSG(extack, "Device is up. Set it down before adding it as a team port");
1187                 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1188                            portname);
1189                 return -EBUSY;
1190         }
1191
1192         port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1193                        GFP_KERNEL);
1194         if (!port)
1195                 return -ENOMEM;
1196
1197         port->dev = port_dev;
1198         port->team = team;
1199         INIT_LIST_HEAD(&port->qom_list);
1200
1201         port->orig.mtu = port_dev->mtu;
1202         err = dev_set_mtu(port_dev, dev->mtu);
1203         if (err) {
1204                 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1205                 goto err_set_mtu;
1206         }
1207
1208         memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1209
1210         err = team_port_enter(team, port);
1211         if (err) {
1212                 netdev_err(dev, "Device %s failed to enter team mode\n",
1213                            portname);
1214                 goto err_port_enter;
1215         }
1216
1217         err = dev_open(port_dev, extack);
1218         if (err) {
1219                 netdev_dbg(dev, "Device %s opening failed\n",
1220                            portname);
1221                 goto err_dev_open;
1222         }
1223
1224         err = vlan_vids_add_by_dev(port_dev, dev);
1225         if (err) {
1226                 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1227                                 portname);
1228                 goto err_vids_add;
1229         }
1230
1231         err = team_port_enable_netpoll(port);
1232         if (err) {
1233                 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1234                            portname);
1235                 goto err_enable_netpoll;
1236         }
1237
1238         if (!(dev->features & NETIF_F_LRO))
1239                 dev_disable_lro(port_dev);
1240
1241         err = netdev_rx_handler_register(port_dev, team_handle_frame,
1242                                          port);
1243         if (err) {
1244                 netdev_err(dev, "Device %s failed to register rx_handler\n",
1245                            portname);
1246                 goto err_handler_register;
1247         }
1248
1249         err = team_upper_dev_link(team, port, extack);
1250         if (err) {
1251                 netdev_err(dev, "Device %s failed to set upper link\n",
1252                            portname);
1253                 goto err_set_upper_link;
1254         }
1255
1256         err = __team_option_inst_add_port(team, port);
1257         if (err) {
1258                 netdev_err(dev, "Device %s failed to add per-port options\n",
1259                            portname);
1260                 goto err_option_port_add;
1261         }
1262
1263         /* set promiscuity level to new slave */
1264         if (dev->flags & IFF_PROMISC) {
1265                 err = dev_set_promiscuity(port_dev, 1);
1266                 if (err)
1267                         goto err_set_slave_promisc;
1268         }
1269
1270         /* set allmulti level to new slave */
1271         if (dev->flags & IFF_ALLMULTI) {
1272                 err = dev_set_allmulti(port_dev, 1);
1273                 if (err) {
1274                         if (dev->flags & IFF_PROMISC)
1275                                 dev_set_promiscuity(port_dev, -1);
1276                         goto err_set_slave_promisc;
1277                 }
1278         }
1279
1280         if (dev->flags & IFF_UP) {
1281                 netif_addr_lock_bh(dev);
1282                 dev_uc_sync_multiple(port_dev, dev);
1283                 dev_mc_sync_multiple(port_dev, dev);
1284                 netif_addr_unlock_bh(dev);
1285         }
1286
1287         port->index = -1;
1288         list_add_tail_rcu(&port->list, &team->port_list);
1289         team_port_enable(team, port);
1290         __team_compute_features(team);
1291         __team_port_change_port_added(port, !!netif_oper_up(port_dev));
1292         __team_options_change_check(team);
1293
1294         netdev_info(dev, "Port device %s added\n", portname);
1295
1296         return 0;
1297
1298 err_set_slave_promisc:
1299         __team_option_inst_del_port(team, port);
1300
1301 err_option_port_add:
1302         team_upper_dev_unlink(team, port);
1303
1304 err_set_upper_link:
1305         netdev_rx_handler_unregister(port_dev);
1306
1307 err_handler_register:
1308         team_port_disable_netpoll(port);
1309
1310 err_enable_netpoll:
1311         vlan_vids_del_by_dev(port_dev, dev);
1312
1313 err_vids_add:
1314         dev_close(port_dev);
1315
1316 err_dev_open:
1317         team_port_leave(team, port);
1318         team_port_set_orig_dev_addr(port);
1319
1320 err_port_enter:
1321         dev_set_mtu(port_dev, port->orig.mtu);
1322
1323 err_set_mtu:
1324         kfree(port);
1325
1326         return err;
1327 }
1328
1329 static void __team_port_change_port_removed(struct team_port *port);
1330
1331 static int team_port_del(struct team *team, struct net_device *port_dev)
1332 {
1333         struct net_device *dev = team->dev;
1334         struct team_port *port;
1335         char *portname = port_dev->name;
1336
1337         port = team_port_get_rtnl(port_dev);
1338         if (!port || !team_port_find(team, port)) {
1339                 netdev_err(dev, "Device %s does not act as a port of this team\n",
1340                            portname);
1341                 return -ENOENT;
1342         }
1343
1344         team_port_disable(team, port);
1345         list_del_rcu(&port->list);
1346
1347         if (dev->flags & IFF_PROMISC)
1348                 dev_set_promiscuity(port_dev, -1);
1349         if (dev->flags & IFF_ALLMULTI)
1350                 dev_set_allmulti(port_dev, -1);
1351
1352         team_upper_dev_unlink(team, port);
1353         netdev_rx_handler_unregister(port_dev);
1354         team_port_disable_netpoll(port);
1355         vlan_vids_del_by_dev(port_dev, dev);
1356         if (dev->flags & IFF_UP) {
1357                 dev_uc_unsync(port_dev, dev);
1358                 dev_mc_unsync(port_dev, dev);
1359         }
1360         dev_close(port_dev);
1361         team_port_leave(team, port);
1362
1363         __team_option_inst_mark_removed_port(team, port);
1364         __team_options_change_check(team);
1365         __team_option_inst_del_port(team, port);
1366         __team_port_change_port_removed(port);
1367
1368         team_port_set_orig_dev_addr(port);
1369         dev_set_mtu(port_dev, port->orig.mtu);
1370         kfree_rcu(port, rcu);
1371         netdev_info(dev, "Port device %s removed\n", portname);
1372         __team_compute_features(team);
1373
1374         return 0;
1375 }
1376
1377
1378 /*****************
1379  * Net device ops
1380  *****************/
1381
1382 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1383 {
1384         ctx->data.str_val = team->mode->kind;
1385         return 0;
1386 }
1387
1388 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1389 {
1390         return team_change_mode(team, ctx->data.str_val);
1391 }
1392
1393 static int team_notify_peers_count_get(struct team *team,
1394                                        struct team_gsetter_ctx *ctx)
1395 {
1396         ctx->data.u32_val = team->notify_peers.count;
1397         return 0;
1398 }
1399
1400 static int team_notify_peers_count_set(struct team *team,
1401                                        struct team_gsetter_ctx *ctx)
1402 {
1403         team->notify_peers.count = ctx->data.u32_val;
1404         return 0;
1405 }
1406
1407 static int team_notify_peers_interval_get(struct team *team,
1408                                           struct team_gsetter_ctx *ctx)
1409 {
1410         ctx->data.u32_val = team->notify_peers.interval;
1411         return 0;
1412 }
1413
1414 static int team_notify_peers_interval_set(struct team *team,
1415                                           struct team_gsetter_ctx *ctx)
1416 {
1417         team->notify_peers.interval = ctx->data.u32_val;
1418         return 0;
1419 }
1420
1421 static int team_mcast_rejoin_count_get(struct team *team,
1422                                        struct team_gsetter_ctx *ctx)
1423 {
1424         ctx->data.u32_val = team->mcast_rejoin.count;
1425         return 0;
1426 }
1427
1428 static int team_mcast_rejoin_count_set(struct team *team,
1429                                        struct team_gsetter_ctx *ctx)
1430 {
1431         team->mcast_rejoin.count = ctx->data.u32_val;
1432         return 0;
1433 }
1434
1435 static int team_mcast_rejoin_interval_get(struct team *team,
1436                                           struct team_gsetter_ctx *ctx)
1437 {
1438         ctx->data.u32_val = team->mcast_rejoin.interval;
1439         return 0;
1440 }
1441
1442 static int team_mcast_rejoin_interval_set(struct team *team,
1443                                           struct team_gsetter_ctx *ctx)
1444 {
1445         team->mcast_rejoin.interval = ctx->data.u32_val;
1446         return 0;
1447 }
1448
1449 static int team_port_en_option_get(struct team *team,
1450                                    struct team_gsetter_ctx *ctx)
1451 {
1452         struct team_port *port = ctx->info->port;
1453
1454         ctx->data.bool_val = team_port_enabled(port);
1455         return 0;
1456 }
1457
1458 static int team_port_en_option_set(struct team *team,
1459                                    struct team_gsetter_ctx *ctx)
1460 {
1461         struct team_port *port = ctx->info->port;
1462
1463         if (ctx->data.bool_val)
1464                 team_port_enable(team, port);
1465         else
1466                 team_port_disable(team, port);
1467         return 0;
1468 }
1469
1470 static int team_user_linkup_option_get(struct team *team,
1471                                        struct team_gsetter_ctx *ctx)
1472 {
1473         struct team_port *port = ctx->info->port;
1474
1475         ctx->data.bool_val = port->user.linkup;
1476         return 0;
1477 }
1478
1479 static void __team_carrier_check(struct team *team);
1480
1481 static int team_user_linkup_option_set(struct team *team,
1482                                        struct team_gsetter_ctx *ctx)
1483 {
1484         struct team_port *port = ctx->info->port;
1485
1486         port->user.linkup = ctx->data.bool_val;
1487         team_refresh_port_linkup(port);
1488         __team_carrier_check(port->team);
1489         return 0;
1490 }
1491
1492 static int team_user_linkup_en_option_get(struct team *team,
1493                                           struct team_gsetter_ctx *ctx)
1494 {
1495         struct team_port *port = ctx->info->port;
1496
1497         ctx->data.bool_val = port->user.linkup_enabled;
1498         return 0;
1499 }
1500
1501 static int team_user_linkup_en_option_set(struct team *team,
1502                                           struct team_gsetter_ctx *ctx)
1503 {
1504         struct team_port *port = ctx->info->port;
1505
1506         port->user.linkup_enabled = ctx->data.bool_val;
1507         team_refresh_port_linkup(port);
1508         __team_carrier_check(port->team);
1509         return 0;
1510 }
1511
1512 static int team_priority_option_get(struct team *team,
1513                                     struct team_gsetter_ctx *ctx)
1514 {
1515         struct team_port *port = ctx->info->port;
1516
1517         ctx->data.s32_val = port->priority;
1518         return 0;
1519 }
1520
1521 static int team_priority_option_set(struct team *team,
1522                                     struct team_gsetter_ctx *ctx)
1523 {
1524         struct team_port *port = ctx->info->port;
1525         s32 priority = ctx->data.s32_val;
1526
1527         if (port->priority == priority)
1528                 return 0;
1529         port->priority = priority;
1530         team_queue_override_port_prio_changed(team, port);
1531         return 0;
1532 }
1533
1534 static int team_queue_id_option_get(struct team *team,
1535                                     struct team_gsetter_ctx *ctx)
1536 {
1537         struct team_port *port = ctx->info->port;
1538
1539         ctx->data.u32_val = port->queue_id;
1540         return 0;
1541 }
1542
1543 static int team_queue_id_option_set(struct team *team,
1544                                     struct team_gsetter_ctx *ctx)
1545 {
1546         struct team_port *port = ctx->info->port;
1547         u16 new_queue_id = ctx->data.u32_val;
1548
1549         if (port->queue_id == new_queue_id)
1550                 return 0;
1551         if (new_queue_id >= team->dev->real_num_tx_queues)
1552                 return -EINVAL;
1553         team_queue_override_port_change_queue_id(team, port, new_queue_id);
1554         return 0;
1555 }
1556
1557 static const struct team_option team_options[] = {
1558         {
1559                 .name = "mode",
1560                 .type = TEAM_OPTION_TYPE_STRING,
1561                 .getter = team_mode_option_get,
1562                 .setter = team_mode_option_set,
1563         },
1564         {
1565                 .name = "notify_peers_count",
1566                 .type = TEAM_OPTION_TYPE_U32,
1567                 .getter = team_notify_peers_count_get,
1568                 .setter = team_notify_peers_count_set,
1569         },
1570         {
1571                 .name = "notify_peers_interval",
1572                 .type = TEAM_OPTION_TYPE_U32,
1573                 .getter = team_notify_peers_interval_get,
1574                 .setter = team_notify_peers_interval_set,
1575         },
1576         {
1577                 .name = "mcast_rejoin_count",
1578                 .type = TEAM_OPTION_TYPE_U32,
1579                 .getter = team_mcast_rejoin_count_get,
1580                 .setter = team_mcast_rejoin_count_set,
1581         },
1582         {
1583                 .name = "mcast_rejoin_interval",
1584                 .type = TEAM_OPTION_TYPE_U32,
1585                 .getter = team_mcast_rejoin_interval_get,
1586                 .setter = team_mcast_rejoin_interval_set,
1587         },
1588         {
1589                 .name = "enabled",
1590                 .type = TEAM_OPTION_TYPE_BOOL,
1591                 .per_port = true,
1592                 .getter = team_port_en_option_get,
1593                 .setter = team_port_en_option_set,
1594         },
1595         {
1596                 .name = "user_linkup",
1597                 .type = TEAM_OPTION_TYPE_BOOL,
1598                 .per_port = true,
1599                 .getter = team_user_linkup_option_get,
1600                 .setter = team_user_linkup_option_set,
1601         },
1602         {
1603                 .name = "user_linkup_enabled",
1604                 .type = TEAM_OPTION_TYPE_BOOL,
1605                 .per_port = true,
1606                 .getter = team_user_linkup_en_option_get,
1607                 .setter = team_user_linkup_en_option_set,
1608         },
1609         {
1610                 .name = "priority",
1611                 .type = TEAM_OPTION_TYPE_S32,
1612                 .per_port = true,
1613                 .getter = team_priority_option_get,
1614                 .setter = team_priority_option_set,
1615         },
1616         {
1617                 .name = "queue_id",
1618                 .type = TEAM_OPTION_TYPE_U32,
1619                 .per_port = true,
1620                 .getter = team_queue_id_option_get,
1621                 .setter = team_queue_id_option_set,
1622         },
1623 };
1624
1625
1626 static int team_init(struct net_device *dev)
1627 {
1628         struct team *team = netdev_priv(dev);
1629         int i;
1630         int err;
1631
1632         team->dev = dev;
1633         team_set_no_mode(team);
1634
1635         team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1636         if (!team->pcpu_stats)
1637                 return -ENOMEM;
1638
1639         for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1640                 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1641         INIT_LIST_HEAD(&team->port_list);
1642         err = team_queue_override_init(team);
1643         if (err)
1644                 goto err_team_queue_override_init;
1645
1646         team_adjust_ops(team);
1647
1648         INIT_LIST_HEAD(&team->option_list);
1649         INIT_LIST_HEAD(&team->option_inst_list);
1650
1651         team_notify_peers_init(team);
1652         team_mcast_rejoin_init(team);
1653
1654         err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1655         if (err)
1656                 goto err_options_register;
1657         netif_carrier_off(dev);
1658
1659         lockdep_register_key(&team->team_lock_key);
1660         __mutex_init(&team->lock, "team->team_lock_key", &team->team_lock_key);
1661         netdev_lockdep_set_classes(dev);
1662
1663         return 0;
1664
1665 err_options_register:
1666         team_mcast_rejoin_fini(team);
1667         team_notify_peers_fini(team);
1668         team_queue_override_fini(team);
1669 err_team_queue_override_init:
1670         free_percpu(team->pcpu_stats);
1671
1672         return err;
1673 }
1674
1675 static void team_uninit(struct net_device *dev)
1676 {
1677         struct team *team = netdev_priv(dev);
1678         struct team_port *port;
1679         struct team_port *tmp;
1680
1681         mutex_lock(&team->lock);
1682         list_for_each_entry_safe(port, tmp, &team->port_list, list)
1683                 team_port_del(team, port->dev);
1684
1685         __team_change_mode(team, NULL); /* cleanup */
1686         __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1687         team_mcast_rejoin_fini(team);
1688         team_notify_peers_fini(team);
1689         team_queue_override_fini(team);
1690         mutex_unlock(&team->lock);
1691         netdev_change_features(dev);
1692         lockdep_unregister_key(&team->team_lock_key);
1693 }
1694
1695 static void team_destructor(struct net_device *dev)
1696 {
1697         struct team *team = netdev_priv(dev);
1698
1699         free_percpu(team->pcpu_stats);
1700 }
1701
1702 static int team_open(struct net_device *dev)
1703 {
1704         return 0;
1705 }
1706
1707 static int team_close(struct net_device *dev)
1708 {
1709         struct team *team = netdev_priv(dev);
1710         struct team_port *port;
1711
1712         list_for_each_entry(port, &team->port_list, list) {
1713                 dev_uc_unsync(port->dev, dev);
1714                 dev_mc_unsync(port->dev, dev);
1715         }
1716
1717         return 0;
1718 }
1719
1720 /*
1721  * note: already called with rcu_read_lock
1722  */
1723 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1724 {
1725         struct team *team = netdev_priv(dev);
1726         bool tx_success;
1727         unsigned int len = skb->len;
1728
1729         tx_success = team_queue_override_transmit(team, skb);
1730         if (!tx_success)
1731                 tx_success = team->ops.transmit(team, skb);
1732         if (tx_success) {
1733                 struct team_pcpu_stats *pcpu_stats;
1734
1735                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1736                 u64_stats_update_begin(&pcpu_stats->syncp);
1737                 u64_stats_inc(&pcpu_stats->tx_packets);
1738                 u64_stats_add(&pcpu_stats->tx_bytes, len);
1739                 u64_stats_update_end(&pcpu_stats->syncp);
1740         } else {
1741                 this_cpu_inc(team->pcpu_stats->tx_dropped);
1742         }
1743
1744         return NETDEV_TX_OK;
1745 }
1746
1747 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1748                              struct net_device *sb_dev)
1749 {
1750         /*
1751          * This helper function exists to help dev_pick_tx get the correct
1752          * destination queue.  Using a helper function skips a call to
1753          * skb_tx_hash and will put the skbs in the queue we expect on their
1754          * way down to the team driver.
1755          */
1756         u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1757
1758         /*
1759          * Save the original txq to restore before passing to the driver
1760          */
1761         qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1762
1763         if (unlikely(txq >= dev->real_num_tx_queues)) {
1764                 do {
1765                         txq -= dev->real_num_tx_queues;
1766                 } while (txq >= dev->real_num_tx_queues);
1767         }
1768         return txq;
1769 }
1770
1771 static void team_change_rx_flags(struct net_device *dev, int change)
1772 {
1773         struct team *team = netdev_priv(dev);
1774         struct team_port *port;
1775         int inc;
1776
1777         rcu_read_lock();
1778         list_for_each_entry_rcu(port, &team->port_list, list) {
1779                 if (change & IFF_PROMISC) {
1780                         inc = dev->flags & IFF_PROMISC ? 1 : -1;
1781                         dev_set_promiscuity(port->dev, inc);
1782                 }
1783                 if (change & IFF_ALLMULTI) {
1784                         inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1785                         dev_set_allmulti(port->dev, inc);
1786                 }
1787         }
1788         rcu_read_unlock();
1789 }
1790
1791 static void team_set_rx_mode(struct net_device *dev)
1792 {
1793         struct team *team = netdev_priv(dev);
1794         struct team_port *port;
1795
1796         rcu_read_lock();
1797         list_for_each_entry_rcu(port, &team->port_list, list) {
1798                 dev_uc_sync_multiple(port->dev, dev);
1799                 dev_mc_sync_multiple(port->dev, dev);
1800         }
1801         rcu_read_unlock();
1802 }
1803
1804 static int team_set_mac_address(struct net_device *dev, void *p)
1805 {
1806         struct sockaddr *addr = p;
1807         struct team *team = netdev_priv(dev);
1808         struct team_port *port;
1809
1810         if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1811                 return -EADDRNOTAVAIL;
1812         dev_addr_set(dev, addr->sa_data);
1813         mutex_lock(&team->lock);
1814         list_for_each_entry(port, &team->port_list, list)
1815                 if (team->ops.port_change_dev_addr)
1816                         team->ops.port_change_dev_addr(team, port);
1817         mutex_unlock(&team->lock);
1818         return 0;
1819 }
1820
1821 static int team_change_mtu(struct net_device *dev, int new_mtu)
1822 {
1823         struct team *team = netdev_priv(dev);
1824         struct team_port *port;
1825         int err;
1826
1827         /*
1828          * Alhough this is reader, it's guarded by team lock. It's not possible
1829          * to traverse list in reverse under rcu_read_lock
1830          */
1831         mutex_lock(&team->lock);
1832         team->port_mtu_change_allowed = true;
1833         list_for_each_entry(port, &team->port_list, list) {
1834                 err = dev_set_mtu(port->dev, new_mtu);
1835                 if (err) {
1836                         netdev_err(dev, "Device %s failed to change mtu",
1837                                    port->dev->name);
1838                         goto unwind;
1839                 }
1840         }
1841         team->port_mtu_change_allowed = false;
1842         mutex_unlock(&team->lock);
1843
1844         dev->mtu = new_mtu;
1845
1846         return 0;
1847
1848 unwind:
1849         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1850                 dev_set_mtu(port->dev, dev->mtu);
1851         team->port_mtu_change_allowed = false;
1852         mutex_unlock(&team->lock);
1853
1854         return err;
1855 }
1856
1857 static void
1858 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1859 {
1860         struct team *team = netdev_priv(dev);
1861         struct team_pcpu_stats *p;
1862         u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1863         u32 rx_dropped = 0, tx_dropped = 0, rx_nohandler = 0;
1864         unsigned int start;
1865         int i;
1866
1867         for_each_possible_cpu(i) {
1868                 p = per_cpu_ptr(team->pcpu_stats, i);
1869                 do {
1870                         start = u64_stats_fetch_begin(&p->syncp);
1871                         rx_packets      = u64_stats_read(&p->rx_packets);
1872                         rx_bytes        = u64_stats_read(&p->rx_bytes);
1873                         rx_multicast    = u64_stats_read(&p->rx_multicast);
1874                         tx_packets      = u64_stats_read(&p->tx_packets);
1875                         tx_bytes        = u64_stats_read(&p->tx_bytes);
1876                 } while (u64_stats_fetch_retry(&p->syncp, start));
1877
1878                 stats->rx_packets       += rx_packets;
1879                 stats->rx_bytes         += rx_bytes;
1880                 stats->multicast        += rx_multicast;
1881                 stats->tx_packets       += tx_packets;
1882                 stats->tx_bytes         += tx_bytes;
1883                 /*
1884                  * rx_dropped, tx_dropped & rx_nohandler are u32,
1885                  * updated without syncp protection.
1886                  */
1887                 rx_dropped      += READ_ONCE(p->rx_dropped);
1888                 tx_dropped      += READ_ONCE(p->tx_dropped);
1889                 rx_nohandler    += READ_ONCE(p->rx_nohandler);
1890         }
1891         stats->rx_dropped       = rx_dropped;
1892         stats->tx_dropped       = tx_dropped;
1893         stats->rx_nohandler     = rx_nohandler;
1894 }
1895
1896 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1897 {
1898         struct team *team = netdev_priv(dev);
1899         struct team_port *port;
1900         int err;
1901
1902         /*
1903          * Alhough this is reader, it's guarded by team lock. It's not possible
1904          * to traverse list in reverse under rcu_read_lock
1905          */
1906         mutex_lock(&team->lock);
1907         list_for_each_entry(port, &team->port_list, list) {
1908                 err = vlan_vid_add(port->dev, proto, vid);
1909                 if (err)
1910                         goto unwind;
1911         }
1912         mutex_unlock(&team->lock);
1913
1914         return 0;
1915
1916 unwind:
1917         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1918                 vlan_vid_del(port->dev, proto, vid);
1919         mutex_unlock(&team->lock);
1920
1921         return err;
1922 }
1923
1924 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1925 {
1926         struct team *team = netdev_priv(dev);
1927         struct team_port *port;
1928
1929         mutex_lock(&team->lock);
1930         list_for_each_entry(port, &team->port_list, list)
1931                 vlan_vid_del(port->dev, proto, vid);
1932         mutex_unlock(&team->lock);
1933
1934         return 0;
1935 }
1936
1937 #ifdef CONFIG_NET_POLL_CONTROLLER
1938 static void team_poll_controller(struct net_device *dev)
1939 {
1940 }
1941
1942 static void __team_netpoll_cleanup(struct team *team)
1943 {
1944         struct team_port *port;
1945
1946         list_for_each_entry(port, &team->port_list, list)
1947                 team_port_disable_netpoll(port);
1948 }
1949
1950 static void team_netpoll_cleanup(struct net_device *dev)
1951 {
1952         struct team *team = netdev_priv(dev);
1953
1954         mutex_lock(&team->lock);
1955         __team_netpoll_cleanup(team);
1956         mutex_unlock(&team->lock);
1957 }
1958
1959 static int team_netpoll_setup(struct net_device *dev,
1960                               struct netpoll_info *npifo)
1961 {
1962         struct team *team = netdev_priv(dev);
1963         struct team_port *port;
1964         int err = 0;
1965
1966         mutex_lock(&team->lock);
1967         list_for_each_entry(port, &team->port_list, list) {
1968                 err = __team_port_enable_netpoll(port);
1969                 if (err) {
1970                         __team_netpoll_cleanup(team);
1971                         break;
1972                 }
1973         }
1974         mutex_unlock(&team->lock);
1975         return err;
1976 }
1977 #endif
1978
1979 static int team_add_slave(struct net_device *dev, struct net_device *port_dev,
1980                           struct netlink_ext_ack *extack)
1981 {
1982         struct team *team = netdev_priv(dev);
1983         int err;
1984
1985         mutex_lock(&team->lock);
1986         err = team_port_add(team, port_dev, extack);
1987         mutex_unlock(&team->lock);
1988
1989         if (!err)
1990                 netdev_change_features(dev);
1991
1992         return err;
1993 }
1994
1995 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1996 {
1997         struct team *team = netdev_priv(dev);
1998         int err;
1999
2000         mutex_lock(&team->lock);
2001         err = team_port_del(team, port_dev);
2002         mutex_unlock(&team->lock);
2003
2004         if (err)
2005                 return err;
2006
2007         if (netif_is_team_master(port_dev)) {
2008                 lockdep_unregister_key(&team->team_lock_key);
2009                 lockdep_register_key(&team->team_lock_key);
2010                 lockdep_set_class(&team->lock, &team->team_lock_key);
2011         }
2012         netdev_change_features(dev);
2013
2014         return err;
2015 }
2016
2017 static netdev_features_t team_fix_features(struct net_device *dev,
2018                                            netdev_features_t features)
2019 {
2020         struct team_port *port;
2021         struct team *team = netdev_priv(dev);
2022         netdev_features_t mask;
2023
2024         mask = features;
2025         features &= ~NETIF_F_ONE_FOR_ALL;
2026         features |= NETIF_F_ALL_FOR_ALL;
2027
2028         rcu_read_lock();
2029         list_for_each_entry_rcu(port, &team->port_list, list) {
2030                 features = netdev_increment_features(features,
2031                                                      port->dev->features,
2032                                                      mask);
2033         }
2034         rcu_read_unlock();
2035
2036         features = netdev_add_tso_features(features, mask);
2037
2038         return features;
2039 }
2040
2041 static int team_change_carrier(struct net_device *dev, bool new_carrier)
2042 {
2043         struct team *team = netdev_priv(dev);
2044
2045         team->user_carrier_enabled = true;
2046
2047         if (new_carrier)
2048                 netif_carrier_on(dev);
2049         else
2050                 netif_carrier_off(dev);
2051         return 0;
2052 }
2053
2054 static const struct net_device_ops team_netdev_ops = {
2055         .ndo_init               = team_init,
2056         .ndo_uninit             = team_uninit,
2057         .ndo_open               = team_open,
2058         .ndo_stop               = team_close,
2059         .ndo_start_xmit         = team_xmit,
2060         .ndo_select_queue       = team_select_queue,
2061         .ndo_change_rx_flags    = team_change_rx_flags,
2062         .ndo_set_rx_mode        = team_set_rx_mode,
2063         .ndo_set_mac_address    = team_set_mac_address,
2064         .ndo_change_mtu         = team_change_mtu,
2065         .ndo_get_stats64        = team_get_stats64,
2066         .ndo_vlan_rx_add_vid    = team_vlan_rx_add_vid,
2067         .ndo_vlan_rx_kill_vid   = team_vlan_rx_kill_vid,
2068 #ifdef CONFIG_NET_POLL_CONTROLLER
2069         .ndo_poll_controller    = team_poll_controller,
2070         .ndo_netpoll_setup      = team_netpoll_setup,
2071         .ndo_netpoll_cleanup    = team_netpoll_cleanup,
2072 #endif
2073         .ndo_add_slave          = team_add_slave,
2074         .ndo_del_slave          = team_del_slave,
2075         .ndo_fix_features       = team_fix_features,
2076         .ndo_change_carrier     = team_change_carrier,
2077         .ndo_features_check     = passthru_features_check,
2078 };
2079
2080 /***********************
2081  * ethtool interface
2082  ***********************/
2083
2084 static void team_ethtool_get_drvinfo(struct net_device *dev,
2085                                      struct ethtool_drvinfo *drvinfo)
2086 {
2087         strscpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
2088         strscpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2089 }
2090
2091 static int team_ethtool_get_link_ksettings(struct net_device *dev,
2092                                            struct ethtool_link_ksettings *cmd)
2093 {
2094         struct team *team= netdev_priv(dev);
2095         unsigned long speed = 0;
2096         struct team_port *port;
2097
2098         cmd->base.duplex = DUPLEX_UNKNOWN;
2099         cmd->base.port = PORT_OTHER;
2100
2101         rcu_read_lock();
2102         list_for_each_entry_rcu(port, &team->port_list, list) {
2103                 if (team_port_txable(port)) {
2104                         if (port->state.speed != SPEED_UNKNOWN)
2105                                 speed += port->state.speed;
2106                         if (cmd->base.duplex == DUPLEX_UNKNOWN &&
2107                             port->state.duplex != DUPLEX_UNKNOWN)
2108                                 cmd->base.duplex = port->state.duplex;
2109                 }
2110         }
2111         rcu_read_unlock();
2112
2113         cmd->base.speed = speed ? : SPEED_UNKNOWN;
2114
2115         return 0;
2116 }
2117
2118 static const struct ethtool_ops team_ethtool_ops = {
2119         .get_drvinfo            = team_ethtool_get_drvinfo,
2120         .get_link               = ethtool_op_get_link,
2121         .get_link_ksettings     = team_ethtool_get_link_ksettings,
2122 };
2123
2124 /***********************
2125  * rt netlink interface
2126  ***********************/
2127
2128 static void team_setup_by_port(struct net_device *dev,
2129                                struct net_device *port_dev)
2130 {
2131         dev->header_ops = port_dev->header_ops;
2132         dev->type = port_dev->type;
2133         dev->hard_header_len = port_dev->hard_header_len;
2134         dev->needed_headroom = port_dev->needed_headroom;
2135         dev->addr_len = port_dev->addr_len;
2136         dev->mtu = port_dev->mtu;
2137         memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2138         eth_hw_addr_inherit(dev, port_dev);
2139 }
2140
2141 static int team_dev_type_check_change(struct net_device *dev,
2142                                       struct net_device *port_dev)
2143 {
2144         struct team *team = netdev_priv(dev);
2145         char *portname = port_dev->name;
2146         int err;
2147
2148         if (dev->type == port_dev->type)
2149                 return 0;
2150         if (!list_empty(&team->port_list)) {
2151                 netdev_err(dev, "Device %s is of different type\n", portname);
2152                 return -EBUSY;
2153         }
2154         err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2155         err = notifier_to_errno(err);
2156         if (err) {
2157                 netdev_err(dev, "Refused to change device type\n");
2158                 return err;
2159         }
2160         dev_uc_flush(dev);
2161         dev_mc_flush(dev);
2162         team_setup_by_port(dev, port_dev);
2163         call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2164         return 0;
2165 }
2166
2167 static void team_setup(struct net_device *dev)
2168 {
2169         ether_setup(dev);
2170         dev->max_mtu = ETH_MAX_MTU;
2171
2172         dev->netdev_ops = &team_netdev_ops;
2173         dev->ethtool_ops = &team_ethtool_ops;
2174         dev->needs_free_netdev = true;
2175         dev->priv_destructor = team_destructor;
2176         dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2177         dev->priv_flags |= IFF_NO_QUEUE;
2178         dev->priv_flags |= IFF_TEAM;
2179
2180         /*
2181          * Indicate we support unicast address filtering. That way core won't
2182          * bring us to promisc mode in case a unicast addr is added.
2183          * Let this up to underlay drivers.
2184          */
2185         dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2186
2187         dev->features |= NETIF_F_LLTX;
2188         dev->features |= NETIF_F_GRO;
2189
2190         /* Don't allow team devices to change network namespaces. */
2191         dev->features |= NETIF_F_NETNS_LOCAL;
2192
2193         dev->hw_features = TEAM_VLAN_FEATURES |
2194                            NETIF_F_HW_VLAN_CTAG_RX |
2195                            NETIF_F_HW_VLAN_CTAG_FILTER;
2196
2197         dev->hw_features |= NETIF_F_GSO_ENCAP_ALL;
2198         dev->features |= dev->hw_features;
2199         dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
2200 }
2201
2202 static int team_newlink(struct net *src_net, struct net_device *dev,
2203                         struct nlattr *tb[], struct nlattr *data[],
2204                         struct netlink_ext_ack *extack)
2205 {
2206         if (tb[IFLA_ADDRESS] == NULL)
2207                 eth_hw_addr_random(dev);
2208
2209         return register_netdevice(dev);
2210 }
2211
2212 static int team_validate(struct nlattr *tb[], struct nlattr *data[],
2213                          struct netlink_ext_ack *extack)
2214 {
2215         if (tb[IFLA_ADDRESS]) {
2216                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2217                         return -EINVAL;
2218                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2219                         return -EADDRNOTAVAIL;
2220         }
2221         return 0;
2222 }
2223
2224 static unsigned int team_get_num_tx_queues(void)
2225 {
2226         return TEAM_DEFAULT_NUM_TX_QUEUES;
2227 }
2228
2229 static unsigned int team_get_num_rx_queues(void)
2230 {
2231         return TEAM_DEFAULT_NUM_RX_QUEUES;
2232 }
2233
2234 static struct rtnl_link_ops team_link_ops __read_mostly = {
2235         .kind                   = DRV_NAME,
2236         .priv_size              = sizeof(struct team),
2237         .setup                  = team_setup,
2238         .newlink                = team_newlink,
2239         .validate               = team_validate,
2240         .get_num_tx_queues      = team_get_num_tx_queues,
2241         .get_num_rx_queues      = team_get_num_rx_queues,
2242 };
2243
2244
2245 /***********************************
2246  * Generic netlink custom interface
2247  ***********************************/
2248
2249 static struct genl_family team_nl_family;
2250
2251 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2252         [TEAM_ATTR_UNSPEC]                      = { .type = NLA_UNSPEC, },
2253         [TEAM_ATTR_TEAM_IFINDEX]                = { .type = NLA_U32 },
2254         [TEAM_ATTR_LIST_OPTION]                 = { .type = NLA_NESTED },
2255         [TEAM_ATTR_LIST_PORT]                   = { .type = NLA_NESTED },
2256 };
2257
2258 static const struct nla_policy
2259 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2260         [TEAM_ATTR_OPTION_UNSPEC]               = { .type = NLA_UNSPEC, },
2261         [TEAM_ATTR_OPTION_NAME] = {
2262                 .type = NLA_STRING,
2263                 .len = TEAM_STRING_MAX_LEN,
2264         },
2265         [TEAM_ATTR_OPTION_CHANGED]              = { .type = NLA_FLAG },
2266         [TEAM_ATTR_OPTION_TYPE]                 = { .type = NLA_U8 },
2267         [TEAM_ATTR_OPTION_DATA]                 = { .type = NLA_BINARY },
2268         [TEAM_ATTR_OPTION_PORT_IFINDEX]         = { .type = NLA_U32 },
2269         [TEAM_ATTR_OPTION_ARRAY_INDEX]          = { .type = NLA_U32 },
2270 };
2271
2272 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2273 {
2274         struct sk_buff *msg;
2275         void *hdr;
2276         int err;
2277
2278         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2279         if (!msg)
2280                 return -ENOMEM;
2281
2282         hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2283                           &team_nl_family, 0, TEAM_CMD_NOOP);
2284         if (!hdr) {
2285                 err = -EMSGSIZE;
2286                 goto err_msg_put;
2287         }
2288
2289         genlmsg_end(msg, hdr);
2290
2291         return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2292
2293 err_msg_put:
2294         nlmsg_free(msg);
2295
2296         return err;
2297 }
2298
2299 /*
2300  * Netlink cmd functions should be locked by following two functions.
2301  * Since dev gets held here, that ensures dev won't disappear in between.
2302  */
2303 static struct team *team_nl_team_get(struct genl_info *info)
2304 {
2305         struct net *net = genl_info_net(info);
2306         int ifindex;
2307         struct net_device *dev;
2308         struct team *team;
2309
2310         if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2311                 return NULL;
2312
2313         ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2314         dev = dev_get_by_index(net, ifindex);
2315         if (!dev || dev->netdev_ops != &team_netdev_ops) {
2316                 if (dev)
2317                         dev_put(dev);
2318                 return NULL;
2319         }
2320
2321         team = netdev_priv(dev);
2322         mutex_lock(&team->lock);
2323         return team;
2324 }
2325
2326 static void team_nl_team_put(struct team *team)
2327 {
2328         mutex_unlock(&team->lock);
2329         dev_put(team->dev);
2330 }
2331
2332 typedef int team_nl_send_func_t(struct sk_buff *skb,
2333                                 struct team *team, u32 portid);
2334
2335 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2336 {
2337         return genlmsg_unicast(dev_net(team->dev), skb, portid);
2338 }
2339
2340 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2341                                        struct team_option_inst *opt_inst)
2342 {
2343         struct nlattr *option_item;
2344         struct team_option *option = opt_inst->option;
2345         struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2346         struct team_gsetter_ctx ctx;
2347         int err;
2348
2349         ctx.info = opt_inst_info;
2350         err = team_option_get(team, opt_inst, &ctx);
2351         if (err)
2352                 return err;
2353
2354         option_item = nla_nest_start_noflag(skb, TEAM_ATTR_ITEM_OPTION);
2355         if (!option_item)
2356                 return -EMSGSIZE;
2357
2358         if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2359                 goto nest_cancel;
2360         if (opt_inst_info->port &&
2361             nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2362                         opt_inst_info->port->dev->ifindex))
2363                 goto nest_cancel;
2364         if (opt_inst->option->array_size &&
2365             nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2366                         opt_inst_info->array_index))
2367                 goto nest_cancel;
2368
2369         switch (option->type) {
2370         case TEAM_OPTION_TYPE_U32:
2371                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2372                         goto nest_cancel;
2373                 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2374                         goto nest_cancel;
2375                 break;
2376         case TEAM_OPTION_TYPE_STRING:
2377                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2378                         goto nest_cancel;
2379                 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2380                                    ctx.data.str_val))
2381                         goto nest_cancel;
2382                 break;
2383         case TEAM_OPTION_TYPE_BINARY:
2384                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2385                         goto nest_cancel;
2386                 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2387                             ctx.data.bin_val.ptr))
2388                         goto nest_cancel;
2389                 break;
2390         case TEAM_OPTION_TYPE_BOOL:
2391                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2392                         goto nest_cancel;
2393                 if (ctx.data.bool_val &&
2394                     nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2395                         goto nest_cancel;
2396                 break;
2397         case TEAM_OPTION_TYPE_S32:
2398                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2399                         goto nest_cancel;
2400                 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2401                         goto nest_cancel;
2402                 break;
2403         default:
2404                 BUG();
2405         }
2406         if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2407                 goto nest_cancel;
2408         if (opt_inst->changed) {
2409                 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2410                         goto nest_cancel;
2411                 opt_inst->changed = false;
2412         }
2413         nla_nest_end(skb, option_item);
2414         return 0;
2415
2416 nest_cancel:
2417         nla_nest_cancel(skb, option_item);
2418         return -EMSGSIZE;
2419 }
2420
2421 static int __send_and_alloc_skb(struct sk_buff **pskb,
2422                                 struct team *team, u32 portid,
2423                                 team_nl_send_func_t *send_func)
2424 {
2425         int err;
2426
2427         if (*pskb) {
2428                 err = send_func(*pskb, team, portid);
2429                 if (err)
2430                         return err;
2431         }
2432         *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2433         if (!*pskb)
2434                 return -ENOMEM;
2435         return 0;
2436 }
2437
2438 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2439                                     int flags, team_nl_send_func_t *send_func,
2440                                     struct list_head *sel_opt_inst_list)
2441 {
2442         struct nlattr *option_list;
2443         struct nlmsghdr *nlh;
2444         void *hdr;
2445         struct team_option_inst *opt_inst;
2446         int err;
2447         struct sk_buff *skb = NULL;
2448         bool incomplete;
2449         int i;
2450
2451         opt_inst = list_first_entry(sel_opt_inst_list,
2452                                     struct team_option_inst, tmp_list);
2453
2454 start_again:
2455         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2456         if (err)
2457                 return err;
2458
2459         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2460                           TEAM_CMD_OPTIONS_GET);
2461         if (!hdr) {
2462                 nlmsg_free(skb);
2463                 return -EMSGSIZE;
2464         }
2465
2466         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2467                 goto nla_put_failure;
2468         option_list = nla_nest_start_noflag(skb, TEAM_ATTR_LIST_OPTION);
2469         if (!option_list)
2470                 goto nla_put_failure;
2471
2472         i = 0;
2473         incomplete = false;
2474         list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2475                 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2476                 if (err) {
2477                         if (err == -EMSGSIZE) {
2478                                 if (!i)
2479                                         goto errout;
2480                                 incomplete = true;
2481                                 break;
2482                         }
2483                         goto errout;
2484                 }
2485                 i++;
2486         }
2487
2488         nla_nest_end(skb, option_list);
2489         genlmsg_end(skb, hdr);
2490         if (incomplete)
2491                 goto start_again;
2492
2493 send_done:
2494         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2495         if (!nlh) {
2496                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2497                 if (err)
2498                         return err;
2499                 goto send_done;
2500         }
2501
2502         return send_func(skb, team, portid);
2503
2504 nla_put_failure:
2505         err = -EMSGSIZE;
2506 errout:
2507         nlmsg_free(skb);
2508         return err;
2509 }
2510
2511 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2512 {
2513         struct team *team;
2514         struct team_option_inst *opt_inst;
2515         int err;
2516         LIST_HEAD(sel_opt_inst_list);
2517
2518         team = team_nl_team_get(info);
2519         if (!team)
2520                 return -EINVAL;
2521
2522         list_for_each_entry(opt_inst, &team->option_inst_list, list)
2523                 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2524         err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2525                                        NLM_F_ACK, team_nl_send_unicast,
2526                                        &sel_opt_inst_list);
2527
2528         team_nl_team_put(team);
2529
2530         return err;
2531 }
2532
2533 static int team_nl_send_event_options_get(struct team *team,
2534                                           struct list_head *sel_opt_inst_list);
2535
2536 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2537 {
2538         struct team *team;
2539         int err = 0;
2540         int i;
2541         struct nlattr *nl_option;
2542
2543         rtnl_lock();
2544
2545         team = team_nl_team_get(info);
2546         if (!team) {
2547                 err = -EINVAL;
2548                 goto rtnl_unlock;
2549         }
2550
2551         err = -EINVAL;
2552         if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2553                 err = -EINVAL;
2554                 goto team_put;
2555         }
2556
2557         nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2558                 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2559                 struct nlattr *attr;
2560                 struct nlattr *attr_data;
2561                 LIST_HEAD(opt_inst_list);
2562                 enum team_option_type opt_type;
2563                 int opt_port_ifindex = 0; /* != 0 for per-port options */
2564                 u32 opt_array_index = 0;
2565                 bool opt_is_array = false;
2566                 struct team_option_inst *opt_inst;
2567                 char *opt_name;
2568                 bool opt_found = false;
2569
2570                 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2571                         err = -EINVAL;
2572                         goto team_put;
2573                 }
2574                 err = nla_parse_nested_deprecated(opt_attrs,
2575                                                   TEAM_ATTR_OPTION_MAX,
2576                                                   nl_option,
2577                                                   team_nl_option_policy,
2578                                                   info->extack);
2579                 if (err)
2580                         goto team_put;
2581                 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2582                     !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2583                         err = -EINVAL;
2584                         goto team_put;
2585                 }
2586                 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2587                 case NLA_U32:
2588                         opt_type = TEAM_OPTION_TYPE_U32;
2589                         break;
2590                 case NLA_STRING:
2591                         opt_type = TEAM_OPTION_TYPE_STRING;
2592                         break;
2593                 case NLA_BINARY:
2594                         opt_type = TEAM_OPTION_TYPE_BINARY;
2595                         break;
2596                 case NLA_FLAG:
2597                         opt_type = TEAM_OPTION_TYPE_BOOL;
2598                         break;
2599                 case NLA_S32:
2600                         opt_type = TEAM_OPTION_TYPE_S32;
2601                         break;
2602                 default:
2603                         goto team_put;
2604                 }
2605
2606                 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2607                 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2608                         err = -EINVAL;
2609                         goto team_put;
2610                 }
2611
2612                 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2613                 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2614                 if (attr)
2615                         opt_port_ifindex = nla_get_u32(attr);
2616
2617                 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2618                 if (attr) {
2619                         opt_is_array = true;
2620                         opt_array_index = nla_get_u32(attr);
2621                 }
2622
2623                 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2624                         struct team_option *option = opt_inst->option;
2625                         struct team_gsetter_ctx ctx;
2626                         struct team_option_inst_info *opt_inst_info;
2627                         int tmp_ifindex;
2628
2629                         opt_inst_info = &opt_inst->info;
2630                         tmp_ifindex = opt_inst_info->port ?
2631                                       opt_inst_info->port->dev->ifindex : 0;
2632                         if (option->type != opt_type ||
2633                             strcmp(option->name, opt_name) ||
2634                             tmp_ifindex != opt_port_ifindex ||
2635                             (option->array_size && !opt_is_array) ||
2636                             opt_inst_info->array_index != opt_array_index)
2637                                 continue;
2638                         opt_found = true;
2639                         ctx.info = opt_inst_info;
2640                         switch (opt_type) {
2641                         case TEAM_OPTION_TYPE_U32:
2642                                 ctx.data.u32_val = nla_get_u32(attr_data);
2643                                 break;
2644                         case TEAM_OPTION_TYPE_STRING:
2645                                 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2646                                         err = -EINVAL;
2647                                         goto team_put;
2648                                 }
2649                                 ctx.data.str_val = nla_data(attr_data);
2650                                 break;
2651                         case TEAM_OPTION_TYPE_BINARY:
2652                                 ctx.data.bin_val.len = nla_len(attr_data);
2653                                 ctx.data.bin_val.ptr = nla_data(attr_data);
2654                                 break;
2655                         case TEAM_OPTION_TYPE_BOOL:
2656                                 ctx.data.bool_val = attr_data ? true : false;
2657                                 break;
2658                         case TEAM_OPTION_TYPE_S32:
2659                                 ctx.data.s32_val = nla_get_s32(attr_data);
2660                                 break;
2661                         default:
2662                                 BUG();
2663                         }
2664                         err = team_option_set(team, opt_inst, &ctx);
2665                         if (err)
2666                                 goto team_put;
2667                         opt_inst->changed = true;
2668                         list_add(&opt_inst->tmp_list, &opt_inst_list);
2669                 }
2670                 if (!opt_found) {
2671                         err = -ENOENT;
2672                         goto team_put;
2673                 }
2674
2675                 err = team_nl_send_event_options_get(team, &opt_inst_list);
2676                 if (err)
2677                         break;
2678         }
2679
2680 team_put:
2681         team_nl_team_put(team);
2682 rtnl_unlock:
2683         rtnl_unlock();
2684         return err;
2685 }
2686
2687 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2688                                      struct team_port *port)
2689 {
2690         struct nlattr *port_item;
2691
2692         port_item = nla_nest_start_noflag(skb, TEAM_ATTR_ITEM_PORT);
2693         if (!port_item)
2694                 goto nest_cancel;
2695         if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2696                 goto nest_cancel;
2697         if (port->changed) {
2698                 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2699                         goto nest_cancel;
2700                 port->changed = false;
2701         }
2702         if ((port->removed &&
2703              nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2704             (port->state.linkup &&
2705              nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2706             nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2707             nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2708                 goto nest_cancel;
2709         nla_nest_end(skb, port_item);
2710         return 0;
2711
2712 nest_cancel:
2713         nla_nest_cancel(skb, port_item);
2714         return -EMSGSIZE;
2715 }
2716
2717 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2718                                       int flags, team_nl_send_func_t *send_func,
2719                                       struct team_port *one_port)
2720 {
2721         struct nlattr *port_list;
2722         struct nlmsghdr *nlh;
2723         void *hdr;
2724         struct team_port *port;
2725         int err;
2726         struct sk_buff *skb = NULL;
2727         bool incomplete;
2728         int i;
2729
2730         port = list_first_entry_or_null(&team->port_list,
2731                                         struct team_port, list);
2732
2733 start_again:
2734         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2735         if (err)
2736                 return err;
2737
2738         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2739                           TEAM_CMD_PORT_LIST_GET);
2740         if (!hdr) {
2741                 nlmsg_free(skb);
2742                 return -EMSGSIZE;
2743         }
2744
2745         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2746                 goto nla_put_failure;
2747         port_list = nla_nest_start_noflag(skb, TEAM_ATTR_LIST_PORT);
2748         if (!port_list)
2749                 goto nla_put_failure;
2750
2751         i = 0;
2752         incomplete = false;
2753
2754         /* If one port is selected, called wants to send port list containing
2755          * only this port. Otherwise go through all listed ports and send all
2756          */
2757         if (one_port) {
2758                 err = team_nl_fill_one_port_get(skb, one_port);
2759                 if (err)
2760                         goto errout;
2761         } else if (port) {
2762                 list_for_each_entry_from(port, &team->port_list, list) {
2763                         err = team_nl_fill_one_port_get(skb, port);
2764                         if (err) {
2765                                 if (err == -EMSGSIZE) {
2766                                         if (!i)
2767                                                 goto errout;
2768                                         incomplete = true;
2769                                         break;
2770                                 }
2771                                 goto errout;
2772                         }
2773                         i++;
2774                 }
2775         }
2776
2777         nla_nest_end(skb, port_list);
2778         genlmsg_end(skb, hdr);
2779         if (incomplete)
2780                 goto start_again;
2781
2782 send_done:
2783         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2784         if (!nlh) {
2785                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2786                 if (err)
2787                         return err;
2788                 goto send_done;
2789         }
2790
2791         return send_func(skb, team, portid);
2792
2793 nla_put_failure:
2794         err = -EMSGSIZE;
2795 errout:
2796         nlmsg_free(skb);
2797         return err;
2798 }
2799
2800 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2801                                      struct genl_info *info)
2802 {
2803         struct team *team;
2804         int err;
2805
2806         team = team_nl_team_get(info);
2807         if (!team)
2808                 return -EINVAL;
2809
2810         err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2811                                          NLM_F_ACK, team_nl_send_unicast, NULL);
2812
2813         team_nl_team_put(team);
2814
2815         return err;
2816 }
2817
2818 static const struct genl_small_ops team_nl_ops[] = {
2819         {
2820                 .cmd = TEAM_CMD_NOOP,
2821                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2822                 .doit = team_nl_cmd_noop,
2823         },
2824         {
2825                 .cmd = TEAM_CMD_OPTIONS_SET,
2826                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2827                 .doit = team_nl_cmd_options_set,
2828                 .flags = GENL_ADMIN_PERM,
2829         },
2830         {
2831                 .cmd = TEAM_CMD_OPTIONS_GET,
2832                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2833                 .doit = team_nl_cmd_options_get,
2834                 .flags = GENL_ADMIN_PERM,
2835         },
2836         {
2837                 .cmd = TEAM_CMD_PORT_LIST_GET,
2838                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2839                 .doit = team_nl_cmd_port_list_get,
2840                 .flags = GENL_ADMIN_PERM,
2841         },
2842 };
2843
2844 static const struct genl_multicast_group team_nl_mcgrps[] = {
2845         { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2846 };
2847
2848 static struct genl_family team_nl_family __ro_after_init = {
2849         .name           = TEAM_GENL_NAME,
2850         .version        = TEAM_GENL_VERSION,
2851         .maxattr        = TEAM_ATTR_MAX,
2852         .policy = team_nl_policy,
2853         .netnsok        = true,
2854         .module         = THIS_MODULE,
2855         .small_ops      = team_nl_ops,
2856         .n_small_ops    = ARRAY_SIZE(team_nl_ops),
2857         .resv_start_op  = TEAM_CMD_PORT_LIST_GET + 1,
2858         .mcgrps         = team_nl_mcgrps,
2859         .n_mcgrps       = ARRAY_SIZE(team_nl_mcgrps),
2860 };
2861
2862 static int team_nl_send_multicast(struct sk_buff *skb,
2863                                   struct team *team, u32 portid)
2864 {
2865         return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2866                                        skb, 0, 0, GFP_KERNEL);
2867 }
2868
2869 static int team_nl_send_event_options_get(struct team *team,
2870                                           struct list_head *sel_opt_inst_list)
2871 {
2872         return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2873                                         sel_opt_inst_list);
2874 }
2875
2876 static int team_nl_send_event_port_get(struct team *team,
2877                                        struct team_port *port)
2878 {
2879         return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2880                                           port);
2881 }
2882
2883 static int __init team_nl_init(void)
2884 {
2885         return genl_register_family(&team_nl_family);
2886 }
2887
2888 static void team_nl_fini(void)
2889 {
2890         genl_unregister_family(&team_nl_family);
2891 }
2892
2893
2894 /******************
2895  * Change checkers
2896  ******************/
2897
2898 static void __team_options_change_check(struct team *team)
2899 {
2900         int err;
2901         struct team_option_inst *opt_inst;
2902         LIST_HEAD(sel_opt_inst_list);
2903
2904         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2905                 if (opt_inst->changed)
2906                         list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2907         }
2908         err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2909         if (err && err != -ESRCH)
2910                 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2911                             err);
2912 }
2913
2914 /* rtnl lock is held */
2915
2916 static void __team_port_change_send(struct team_port *port, bool linkup)
2917 {
2918         int err;
2919
2920         port->changed = true;
2921         port->state.linkup = linkup;
2922         team_refresh_port_linkup(port);
2923         if (linkup) {
2924                 struct ethtool_link_ksettings ecmd;
2925
2926                 err = __ethtool_get_link_ksettings(port->dev, &ecmd);
2927                 if (!err) {
2928                         port->state.speed = ecmd.base.speed;
2929                         port->state.duplex = ecmd.base.duplex;
2930                         goto send_event;
2931                 }
2932         }
2933         port->state.speed = 0;
2934         port->state.duplex = 0;
2935
2936 send_event:
2937         err = team_nl_send_event_port_get(port->team, port);
2938         if (err && err != -ESRCH)
2939                 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2940                             port->dev->name, err);
2941
2942 }
2943
2944 static void __team_carrier_check(struct team *team)
2945 {
2946         struct team_port *port;
2947         bool team_linkup;
2948
2949         if (team->user_carrier_enabled)
2950                 return;
2951
2952         team_linkup = false;
2953         list_for_each_entry(port, &team->port_list, list) {
2954                 if (port->linkup) {
2955                         team_linkup = true;
2956                         break;
2957                 }
2958         }
2959
2960         if (team_linkup)
2961                 netif_carrier_on(team->dev);
2962         else
2963                 netif_carrier_off(team->dev);
2964 }
2965
2966 static void __team_port_change_check(struct team_port *port, bool linkup)
2967 {
2968         if (port->state.linkup != linkup)
2969                 __team_port_change_send(port, linkup);
2970         __team_carrier_check(port->team);
2971 }
2972
2973 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2974 {
2975         __team_port_change_send(port, linkup);
2976         __team_carrier_check(port->team);
2977 }
2978
2979 static void __team_port_change_port_removed(struct team_port *port)
2980 {
2981         port->removed = true;
2982         __team_port_change_send(port, false);
2983         __team_carrier_check(port->team);
2984 }
2985
2986 static void team_port_change_check(struct team_port *port, bool linkup)
2987 {
2988         struct team *team = port->team;
2989
2990         mutex_lock(&team->lock);
2991         __team_port_change_check(port, linkup);
2992         mutex_unlock(&team->lock);
2993 }
2994
2995
2996 /************************************
2997  * Net device notifier event handler
2998  ************************************/
2999
3000 static int team_device_event(struct notifier_block *unused,
3001                              unsigned long event, void *ptr)
3002 {
3003         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
3004         struct team_port *port;
3005
3006         port = team_port_get_rtnl(dev);
3007         if (!port)
3008                 return NOTIFY_DONE;
3009
3010         switch (event) {
3011         case NETDEV_UP:
3012                 if (netif_oper_up(dev))
3013                         team_port_change_check(port, true);
3014                 break;
3015         case NETDEV_DOWN:
3016                 team_port_change_check(port, false);
3017                 break;
3018         case NETDEV_CHANGE:
3019                 if (netif_running(port->dev))
3020                         team_port_change_check(port,
3021                                                !!netif_oper_up(port->dev));
3022                 break;
3023         case NETDEV_UNREGISTER:
3024                 team_del_slave(port->team->dev, dev);
3025                 break;
3026         case NETDEV_FEAT_CHANGE:
3027                 team_compute_features(port->team);
3028                 break;
3029         case NETDEV_PRECHANGEMTU:
3030                 /* Forbid to change mtu of underlaying device */
3031                 if (!port->team->port_mtu_change_allowed)
3032                         return NOTIFY_BAD;
3033                 break;
3034         case NETDEV_PRE_TYPE_CHANGE:
3035                 /* Forbid to change type of underlaying device */
3036                 return NOTIFY_BAD;
3037         case NETDEV_RESEND_IGMP:
3038                 /* Propagate to master device */
3039                 call_netdevice_notifiers(event, port->team->dev);
3040                 break;
3041         }
3042         return NOTIFY_DONE;
3043 }
3044
3045 static struct notifier_block team_notifier_block __read_mostly = {
3046         .notifier_call = team_device_event,
3047 };
3048
3049
3050 /***********************
3051  * Module init and exit
3052  ***********************/
3053
3054 static int __init team_module_init(void)
3055 {
3056         int err;
3057
3058         register_netdevice_notifier(&team_notifier_block);
3059
3060         err = rtnl_link_register(&team_link_ops);
3061         if (err)
3062                 goto err_rtnl_reg;
3063
3064         err = team_nl_init();
3065         if (err)
3066                 goto err_nl_init;
3067
3068         return 0;
3069
3070 err_nl_init:
3071         rtnl_link_unregister(&team_link_ops);
3072
3073 err_rtnl_reg:
3074         unregister_netdevice_notifier(&team_notifier_block);
3075
3076         return err;
3077 }
3078
3079 static void __exit team_module_exit(void)
3080 {
3081         team_nl_fini();
3082         rtnl_link_unregister(&team_link_ops);
3083         unregister_netdevice_notifier(&team_notifier_block);
3084 }
3085
3086 module_init(team_module_init);
3087 module_exit(team_module_exit);
3088
3089 MODULE_LICENSE("GPL v2");
3090 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
3091 MODULE_DESCRIPTION("Ethernet team device driver");
3092 MODULE_ALIAS_RTNL_LINK(DRV_NAME);