drivers/net/team/team.c

   1 /*
   2  * drivers/net/team/team.c - Network team device driver
   3  * Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/types.h>
  13 #include <linux/module.h>
  14 #include <linux/init.h>
  15 #include <linux/slab.h>
  16 #include <linux/rcupdate.h>
  17 #include <linux/errno.h>
  18 #include <linux/ctype.h>
  19 #include <linux/notifier.h>
  20 #include <linux/netdevice.h>
  21 #include <linux/netpoll.h>
  22 #include <linux/if_vlan.h>
  23 #include <linux/if_arp.h>
  24 #include <linux/socket.h>
  25 #include <linux/etherdevice.h>
  26 #include <linux/rtnetlink.h>
  27 #include <net/rtnetlink.h>
  28 #include <net/genetlink.h>
  29 #include <net/netlink.h>
  30 #include <net/sch_generic.h>
  31 #include <generated/utsrelease.h>
  32 #include <linux/if_team.h>
  33
  34 #define DRV_NAME "team"
  35
  36
  37 /**********
  38  * Helpers
  39  **********/
  40
  41 static struct team_port *team_port_get_rtnl(const struct net_device *dev)
  42 {
  43         struct team_port *port = rtnl_dereference(dev->rx_handler_data);
  44
  45         return netif_is_team_port(dev) ? port : NULL;
  46 }
  47
  48 /*
  49  * Since the ability to change device address for open port device is tested in
  50  * team_port_add, this function can be called without control of return value
  51  */
  52 static int __set_port_dev_addr(struct net_device *port_dev,
  53                                const unsigned char *dev_addr)
  54 {
  55         struct sockaddr_storage addr;
  56
  57         memcpy(addr.__data, dev_addr, port_dev->addr_len);
  58         addr.ss_family = port_dev->type;
  59         return dev_set_mac_address(port_dev, (struct sockaddr *)&addr, NULL);
  60 }
  61
  62 static int team_port_set_orig_dev_addr(struct team_port *port)
  63 {
  64         return __set_port_dev_addr(port->dev, port->orig.dev_addr);
  65 }
  66
  67 static int team_port_set_team_dev_addr(struct team *team,
  68                                        struct team_port *port)
  69 {
  70         return __set_port_dev_addr(port->dev, team->dev->dev_addr);
  71 }
  72
  73 int team_modeop_port_enter(struct team *team, struct team_port *port)
  74 {
  75         return team_port_set_team_dev_addr(team, port);
  76 }
  77 EXPORT_SYMBOL(team_modeop_port_enter);
  78
  79 void team_modeop_port_change_dev_addr(struct team *team,
  80                                       struct team_port *port)
  81 {
  82         team_port_set_team_dev_addr(team, port);
  83 }
  84 EXPORT_SYMBOL(team_modeop_port_change_dev_addr);
  85
  86 static void team_lower_state_changed(struct team_port *port)
  87 {
  88         struct netdev_lag_lower_state_info info;
  89
  90         info.link_up = port->linkup;
  91         info.tx_enabled = team_port_enabled(port);
  92         netdev_lower_state_changed(port->dev, &info);
  93 }
  94
  95 static void team_refresh_port_linkup(struct team_port *port)
  96 {
  97         bool new_linkup = port->user.linkup_enabled ? port->user.linkup :
  98                                                       port->state.linkup;
  99
 100         if (port->linkup != new_linkup) {
 101                 port->linkup = new_linkup;
 102                 team_lower_state_changed(port);
 103         }
 104 }
 105
 106
 107 /*******************
 108  * Options handling
 109  *******************/
 110
 111 struct team_option_inst { /* One for each option instance */
 112         struct list_head list;
 113         struct list_head tmp_list;
 114         struct team_option *option;
 115         struct team_option_inst_info info;
 116         bool changed;
 117         bool removed;
 118 };
 119
 120 static struct team_option *__team_find_option(struct team *team,
 121                                               const char *opt_name)
 122 {
 123         struct team_option *option;
 124
 125         list_for_each_entry(option, &team->option_list, list) {
 126                 if (strcmp(option->name, opt_name) == 0)
 127                         return option;
 128         }
 129         return NULL;
 130 }
 131
 132 static void __team_option_inst_del(struct team_option_inst *opt_inst)
 133 {
 134         list_del(&opt_inst->list);
 135         kfree(opt_inst);
 136 }
 137
 138 static void __team_option_inst_del_option(struct team *team,
 139                                           struct team_option *option)
 140 {
 141         struct team_option_inst *opt_inst, *tmp;
 142
 143         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 144                 if (opt_inst->option == option)
 145                         __team_option_inst_del(opt_inst);
 146         }
 147 }
 148
 149 static int __team_option_inst_add(struct team *team, struct team_option *option,
 150                                   struct team_port *port)
 151 {
 152         struct team_option_inst *opt_inst;
 153         unsigned int array_size;
 154         unsigned int i;
 155         int err;
 156
 157         array_size = option->array_size;
 158         if (!array_size)
 159                 array_size = 1; /* No array but still need one instance */
 160
 161         for (i = 0; i < array_size; i++) {
 162                 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL);
 163                 if (!opt_inst)
 164                         return -ENOMEM;
 165                 opt_inst->option = option;
 166                 opt_inst->info.port = port;
 167                 opt_inst->info.array_index = i;
 168                 opt_inst->changed = true;
 169                 opt_inst->removed = false;
 170                 list_add_tail(&opt_inst->list, &team->option_inst_list);
 171                 if (option->init) {
 172                         err = option->init(team, &opt_inst->info);
 173                         if (err)
 174                                 return err;
 175                 }
 176
 177         }
 178         return 0;
 179 }
 180
 181 static int __team_option_inst_add_option(struct team *team,
 182                                          struct team_option *option)
 183 {
 184         int err;
 185
 186         if (!option->per_port) {
 187                 err = __team_option_inst_add(team, option, NULL);
 188                 if (err)
 189                         goto inst_del_option;
 190         }
 191         return 0;
 192
 193 inst_del_option:
 194         __team_option_inst_del_option(team, option);
 195         return err;
 196 }
 197
 198 static void __team_option_inst_mark_removed_option(struct team *team,
 199                                                    struct team_option *option)
 200 {
 201         struct team_option_inst *opt_inst;
 202
 203         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 204                 if (opt_inst->option == option) {
 205                         opt_inst->changed = true;
 206                         opt_inst->removed = true;
 207                 }
 208         }
 209 }
 210
 211 static void __team_option_inst_del_port(struct team *team,
 212                                         struct team_port *port)
 213 {
 214         struct team_option_inst *opt_inst, *tmp;
 215
 216         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 217                 if (opt_inst->option->per_port &&
 218                     opt_inst->info.port == port)
 219                         __team_option_inst_del(opt_inst);
 220         }
 221 }
 222
 223 static int __team_option_inst_add_port(struct team *team,
 224                                        struct team_port *port)
 225 {
 226         struct team_option *option;
 227         int err;
 228
 229         list_for_each_entry(option, &team->option_list, list) {
 230                 if (!option->per_port)
 231                         continue;
 232                 err = __team_option_inst_add(team, option, port);
 233                 if (err)
 234                         goto inst_del_port;
 235         }
 236         return 0;
 237
 238 inst_del_port:
 239         __team_option_inst_del_port(team, port);
 240         return err;
 241 }
 242
 243 static void __team_option_inst_mark_removed_port(struct team *team,
 244                                                  struct team_port *port)
 245 {
 246         struct team_option_inst *opt_inst;
 247
 248         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 249                 if (opt_inst->info.port == port) {
 250                         opt_inst->changed = true;
 251                         opt_inst->removed = true;
 252                 }
 253         }
 254 }
 255
 256 static int __team_options_register(struct team *team,
 257                                    const struct team_option *option,
 258                                    size_t option_count)
 259 {
 260         int i;
 261         struct team_option **dst_opts;
 262         int err;
 263
 264         dst_opts = kcalloc(option_count, sizeof(struct team_option *),
 265                            GFP_KERNEL);
 266         if (!dst_opts)
 267                 return -ENOMEM;
 268         for (i = 0; i < option_count; i++, option++) {
 269                 if (__team_find_option(team, option->name)) {
 270                         err = -EEXIST;
 271                         goto alloc_rollback;
 272                 }
 273                 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
 274                 if (!dst_opts[i]) {
 275                         err = -ENOMEM;
 276                         goto alloc_rollback;
 277                 }
 278         }
 279
 280         for (i = 0; i < option_count; i++) {
 281                 err = __team_option_inst_add_option(team, dst_opts[i]);
 282                 if (err)
 283                         goto inst_rollback;
 284                 list_add_tail(&dst_opts[i]->list, &team->option_list);
 285         }
 286
 287         kfree(dst_opts);
 288         return 0;
 289
 290 inst_rollback:
 291         for (i--; i >= 0; i--)
 292                 __team_option_inst_del_option(team, dst_opts[i]);
 293
 294         i = option_count - 1;
 295 alloc_rollback:
 296         for (i--; i >= 0; i--)
 297                 kfree(dst_opts[i]);
 298
 299         kfree(dst_opts);
 300         return err;
 301 }
 302
 303 static void __team_options_mark_removed(struct team *team,
 304                                         const struct team_option *option,
 305                                         size_t option_count)
 306 {
 307         int i;
 308
 309         for (i = 0; i < option_count; i++, option++) {
 310                 struct team_option *del_opt;
 311
 312                 del_opt = __team_find_option(team, option->name);
 313                 if (del_opt)
 314                         __team_option_inst_mark_removed_option(team, del_opt);
 315         }
 316 }
 317
 318 static void __team_options_unregister(struct team *team,
 319                                       const struct team_option *option,
 320                                       size_t option_count)
 321 {
 322         int i;
 323
 324         for (i = 0; i < option_count; i++, option++) {
 325                 struct team_option *del_opt;
 326
 327                 del_opt = __team_find_option(team, option->name);
 328                 if (del_opt) {
 329                         __team_option_inst_del_option(team, del_opt);
 330                         list_del(&del_opt->list);
 331                         kfree(del_opt);
 332                 }
 333         }
 334 }
 335
 336 static void __team_options_change_check(struct team *team);
 337
 338 int team_options_register(struct team *team,
 339                           const struct team_option *option,
 340                           size_t option_count)
 341 {
 342         int err;
 343
 344         err = __team_options_register(team, option, option_count);
 345         if (err)
 346                 return err;
 347         __team_options_change_check(team);
 348         return 0;
 349 }
 350 EXPORT_SYMBOL(team_options_register);
 351
 352 void team_options_unregister(struct team *team,
 353                              const struct team_option *option,
 354                              size_t option_count)
 355 {
 356         __team_options_mark_removed(team, option, option_count);
 357         __team_options_change_check(team);
 358         __team_options_unregister(team, option, option_count);
 359 }
 360 EXPORT_SYMBOL(team_options_unregister);
 361
 362 static int team_option_get(struct team *team,
 363                            struct team_option_inst *opt_inst,
 364                            struct team_gsetter_ctx *ctx)
 365 {
 366         if (!opt_inst->option->getter)
 367                 return -EOPNOTSUPP;
 368         return opt_inst->option->getter(team, ctx);
 369 }
 370
 371 static int team_option_set(struct team *team,
 372                            struct team_option_inst *opt_inst,
 373                            struct team_gsetter_ctx *ctx)
 374 {
 375         if (!opt_inst->option->setter)
 376                 return -EOPNOTSUPP;
 377         return opt_inst->option->setter(team, ctx);
 378 }
 379
 380 void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info)
 381 {
 382         struct team_option_inst *opt_inst;
 383
 384         opt_inst = container_of(opt_inst_info, struct team_option_inst, info);
 385         opt_inst->changed = true;
 386 }
 387 EXPORT_SYMBOL(team_option_inst_set_change);
 388
 389 void team_options_change_check(struct team *team)
 390 {
 391         __team_options_change_check(team);
 392 }
 393 EXPORT_SYMBOL(team_options_change_check);
 394
 395
 396 /****************
 397  * Mode handling
 398  ****************/
 399
 400 static LIST_HEAD(mode_list);
 401 static DEFINE_SPINLOCK(mode_list_lock);
 402
 403 struct team_mode_item {
 404         struct list_head list;
 405         const struct team_mode *mode;
 406 };
 407
 408 static struct team_mode_item *__find_mode(const char *kind)
 409 {
 410         struct team_mode_item *mitem;
 411
 412         list_for_each_entry(mitem, &mode_list, list) {
 413                 if (strcmp(mitem->mode->kind, kind) == 0)
 414                         return mitem;
 415         }
 416         return NULL;
 417 }
 418
 419 static bool is_good_mode_name(const char *name)
 420 {
 421         while (*name != '\0') {
 422                 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
 423                         return false;
 424                 name++;
 425         }
 426         return true;
 427 }
 428
 429 int team_mode_register(const struct team_mode *mode)
 430 {
 431         int err = 0;
 432         struct team_mode_item *mitem;
 433
 434         if (!is_good_mode_name(mode->kind) ||
 435             mode->priv_size > TEAM_MODE_PRIV_SIZE)
 436                 return -EINVAL;
 437
 438         mitem = kmalloc(sizeof(*mitem), GFP_KERNEL);
 439         if (!mitem)
 440                 return -ENOMEM;
 441
 442         spin_lock(&mode_list_lock);
 443         if (__find_mode(mode->kind)) {
 444                 err = -EEXIST;
 445                 kfree(mitem);
 446                 goto unlock;
 447         }
 448         mitem->mode = mode;
 449         list_add_tail(&mitem->list, &mode_list);
 450 unlock:
 451         spin_unlock(&mode_list_lock);
 452         return err;
 453 }
 454 EXPORT_SYMBOL(team_mode_register);
 455
 456 void team_mode_unregister(const struct team_mode *mode)
 457 {
 458         struct team_mode_item *mitem;
 459
 460         spin_lock(&mode_list_lock);
 461         mitem = __find_mode(mode->kind);
 462         if (mitem) {
 463                 list_del_init(&mitem->list);
 464                 kfree(mitem);
 465         }
 466         spin_unlock(&mode_list_lock);
 467 }
 468 EXPORT_SYMBOL(team_mode_unregister);
 469
 470 static const struct team_mode *team_mode_get(const char *kind)
 471 {
 472         struct team_mode_item *mitem;
 473         const struct team_mode *mode = 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         return mode;
 491 }
 492
 493 static void team_mode_put(const struct team_mode *mode)
 494 {
 495         module_put(mode->owner);
 496 }
 497
 498 static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
 499 {
 500         dev_kfree_skb_any(skb);
 501         return false;
 502 }
 503
 504 static rx_handler_result_t team_dummy_receive(struct team *team,
 505                                               struct team_port *port,
 506                                               struct sk_buff *skb)
 507 {
 508         return RX_HANDLER_ANOTHER;
 509 }
 510
 511 static const struct team_mode __team_no_mode = {
 512         .kind           = "*NOMODE*",
 513 };
 514
 515 static bool team_is_mode_set(struct team *team)
 516 {
 517         return team->mode != &__team_no_mode;
 518 }
 519
 520 static void team_set_no_mode(struct team *team)
 521 {
 522         team->user_carrier_enabled = false;
 523         team->mode = &__team_no_mode;
 524 }
 525
 526 static void team_adjust_ops(struct team *team)
 527 {
 528         /*
 529          * To avoid checks in rx/tx skb paths, ensure here that non-null and
 530          * correct ops are always set.
 531          */
 532
 533         if (!team->en_port_count || !team_is_mode_set(team) ||
 534             !team->mode->ops->transmit)
 535                 team->ops.transmit = team_dummy_transmit;
 536         else
 537                 team->ops.transmit = team->mode->ops->transmit;
 538
 539         if (!team->en_port_count || !team_is_mode_set(team) ||
 540             !team->mode->ops->receive)
 541                 team->ops.receive = team_dummy_receive;
 542         else
 543                 team->ops.receive = team->mode->ops->receive;
 544 }
 545
 546 /*
 547  * We can benefit from the fact that it's ensured no port is present
 548  * at the time of mode change. Therefore no packets are in fly so there's no
 549  * need to set mode operations in any special way.
 550  */
 551 static int __team_change_mode(struct team *team,
 552                               const struct team_mode *new_mode)
 553 {
 554         /* Check if mode was previously set and do cleanup if so */
 555         if (team_is_mode_set(team)) {
 556                 void (*exit_op)(struct team *team) = team->ops.exit;
 557
 558                 /* Clear ops area so no callback is called any longer */
 559                 memset(&team->ops, 0, sizeof(struct team_mode_ops));
 560                 team_adjust_ops(team);
 561
 562                 if (exit_op)
 563                         exit_op(team);
 564                 team_mode_put(team->mode);
 565                 team_set_no_mode(team);
 566                 /* zero private data area */
 567                 memset(&team->mode_priv, 0,
 568                        sizeof(struct team) - offsetof(struct team, mode_priv));
 569         }
 570
 571         if (!new_mode)
 572                 return 0;
 573
 574         if (new_mode->ops->init) {
 575                 int err;
 576
 577                 err = new_mode->ops->init(team);
 578                 if (err)
 579                         return err;
 580         }
 581
 582         team->mode = new_mode;
 583         memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
 584         team_adjust_ops(team);
 585
 586         return 0;
 587 }
 588
 589 static int team_change_mode(struct team *team, const char *kind)
 590 {
 591         const struct team_mode *new_mode;
 592         struct net_device *dev = team->dev;
 593         int err;
 594
 595         if (!list_empty(&team->port_list)) {
 596                 netdev_err(dev, "No ports can be present during mode change\n");
 597                 return -EBUSY;
 598         }
 599
 600         if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) {
 601                 netdev_err(dev, "Unable to change to the same mode the team is in\n");
 602                 return -EINVAL;
 603         }
 604
 605         new_mode = team_mode_get(kind);
 606         if (!new_mode) {
 607                 netdev_err(dev, "Mode \"%s\" not found\n", kind);
 608                 return -EINVAL;
 609         }
 610
 611         err = __team_change_mode(team, new_mode);
 612         if (err) {
 613                 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
 614                 team_mode_put(new_mode);
 615                 return err;
 616         }
 617
 618         netdev_info(dev, "Mode changed to \"%s\"\n", kind);
 619         return 0;
 620 }
 621
 622
 623 /*********************
 624  * Peers notification
 625  *********************/
 626
 627 static void team_notify_peers_work(struct work_struct *work)
 628 {
 629         struct team *team;
 630         int val;
 631
 632         team = container_of(work, struct team, notify_peers.dw.work);
 633
 634         if (!rtnl_trylock()) {
 635                 schedule_delayed_work(&team->notify_peers.dw, 0);
 636                 return;
 637         }
 638         val = atomic_dec_if_positive(&team->notify_peers.count_pending);
 639         if (val < 0) {
 640                 rtnl_unlock();
 641                 return;
 642         }
 643         call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, team->dev);
 644         rtnl_unlock();
 645         if (val)
 646                 schedule_delayed_work(&team->notify_peers.dw,
 647                                       msecs_to_jiffies(team->notify_peers.interval));
 648 }
 649
 650 static void team_notify_peers(struct team *team)
 651 {
 652         if (!team->notify_peers.count || !netif_running(team->dev))
 653                 return;
 654         atomic_add(team->notify_peers.count, &team->notify_peers.count_pending);
 655         schedule_delayed_work(&team->notify_peers.dw, 0);
 656 }
 657
 658 static void team_notify_peers_init(struct team *team)
 659 {
 660         INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work);
 661 }
 662
 663 static void team_notify_peers_fini(struct team *team)
 664 {
 665         cancel_delayed_work_sync(&team->notify_peers.dw);
 666 }
 667
 668
 669 /*******************************
 670  * Send multicast group rejoins
 671  *******************************/
 672
 673 static void team_mcast_rejoin_work(struct work_struct *work)
 674 {
 675         struct team *team;
 676         int val;
 677
 678         team = container_of(work, struct team, mcast_rejoin.dw.work);
 679
 680         if (!rtnl_trylock()) {
 681                 schedule_delayed_work(&team->mcast_rejoin.dw, 0);
 682                 return;
 683         }
 684         val = atomic_dec_if_positive(&team->mcast_rejoin.count_pending);
 685         if (val < 0) {
 686                 rtnl_unlock();
 687                 return;
 688         }
 689         call_netdevice_notifiers(NETDEV_RESEND_IGMP, team->dev);
 690         rtnl_unlock();
 691         if (val)
 692                 schedule_delayed_work(&team->mcast_rejoin.dw,
 693                                       msecs_to_jiffies(team->mcast_rejoin.interval));
 694 }
 695
 696 static void team_mcast_rejoin(struct team *team)
 697 {
 698         if (!team->mcast_rejoin.count || !netif_running(team->dev))
 699                 return;
 700         atomic_add(team->mcast_rejoin.count, &team->mcast_rejoin.count_pending);
 701         schedule_delayed_work(&team->mcast_rejoin.dw, 0);
 702 }
 703
 704 static void team_mcast_rejoin_init(struct team *team)
 705 {
 706         INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work);
 707 }
 708
 709 static void team_mcast_rejoin_fini(struct team *team)
 710 {
 711         cancel_delayed_work_sync(&team->mcast_rejoin.dw);
 712 }
 713
 714
 715 /************************
 716  * Rx path frame handler
 717  ************************/
 718
 719 /* note: already called with rcu_read_lock */
 720 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
 721 {
 722         struct sk_buff *skb = *pskb;
 723         struct team_port *port;
 724         struct team *team;
 725         rx_handler_result_t res;
 726
 727         skb = skb_share_check(skb, GFP_ATOMIC);
 728         if (!skb)
 729                 return RX_HANDLER_CONSUMED;
 730
 731         *pskb = skb;
 732
 733         port = team_port_get_rcu(skb->dev);
 734         team = port->team;
 735         if (!team_port_enabled(port)) {
 736                 /* allow exact match delivery for disabled ports */
 737                 res = RX_HANDLER_EXACT;
 738         } else {
 739                 res = team->ops.receive(team, port, skb);
 740         }
 741         if (res == RX_HANDLER_ANOTHER) {
 742                 struct team_pcpu_stats *pcpu_stats;
 743
 744                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
 745                 u64_stats_update_begin(&pcpu_stats->syncp);
 746                 pcpu_stats->rx_packets++;
 747                 pcpu_stats->rx_bytes += skb->len;
 748                 if (skb->pkt_type == PACKET_MULTICAST)
 749                         pcpu_stats->rx_multicast++;
 750                 u64_stats_update_end(&pcpu_stats->syncp);
 751
 752                 skb->dev = team->dev;
 753         } else if (res == RX_HANDLER_EXACT) {
 754                 this_cpu_inc(team->pcpu_stats->rx_nohandler);
 755         } else {
 756                 this_cpu_inc(team->pcpu_stats->rx_dropped);
 757         }
 758
 759         return res;
 760 }
 761
 762
 763 /*************************************
 764  * Multiqueue Tx port select override
 765  *************************************/
 766
 767 static int team_queue_override_init(struct team *team)
 768 {
 769         struct list_head *listarr;
 770         unsigned int queue_cnt = team->dev->num_tx_queues - 1;
 771         unsigned int i;
 772
 773         if (!queue_cnt)
 774                 return 0;
 775         listarr = kmalloc_array(queue_cnt, sizeof(struct list_head),
 776                                 GFP_KERNEL);
 777         if (!listarr)
 778                 return -ENOMEM;
 779         team->qom_lists = listarr;
 780         for (i = 0; i < queue_cnt; i++)
 781                 INIT_LIST_HEAD(listarr++);
 782         return 0;
 783 }
 784
 785 static void team_queue_override_fini(struct team *team)
 786 {
 787         kfree(team->qom_lists);
 788 }
 789
 790 static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
 791 {
 792         return &team->qom_lists[queue_id - 1];
 793 }
 794
 795 /*
 796  * note: already called with rcu_read_lock
 797  */
 798 static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
 799 {
 800         struct list_head *qom_list;
 801         struct team_port *port;
 802
 803         if (!team->queue_override_enabled || !skb->queue_mapping)
 804                 return false;
 805         qom_list = __team_get_qom_list(team, skb->queue_mapping);
 806         list_for_each_entry_rcu(port, qom_list, qom_list) {
 807                 if (!team_dev_queue_xmit(team, port, skb))
 808                         return true;
 809         }
 810         return false;
 811 }
 812
 813 static void __team_queue_override_port_del(struct team *team,
 814                                            struct team_port *port)
 815 {
 816         if (!port->queue_id)
 817                 return;
 818         list_del_rcu(&port->qom_list);
 819 }
 820
 821 static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
 822                                                       struct team_port *cur)
 823 {
 824         if (port->priority < cur->priority)
 825                 return true;
 826         if (port->priority > cur->priority)
 827                 return false;
 828         if (port->index < cur->index)
 829                 return true;
 830         return false;
 831 }
 832
 833 static void __team_queue_override_port_add(struct team *team,
 834                                            struct team_port *port)
 835 {
 836         struct team_port *cur;
 837         struct list_head *qom_list;
 838         struct list_head *node;
 839
 840         if (!port->queue_id)
 841                 return;
 842         qom_list = __team_get_qom_list(team, port->queue_id);
 843         node = qom_list;
 844         list_for_each_entry(cur, qom_list, qom_list) {
 845                 if (team_queue_override_port_has_gt_prio_than(port, cur))
 846                         break;
 847                 node = &cur->qom_list;
 848         }
 849         list_add_tail_rcu(&port->qom_list, node);
 850 }
 851
 852 static void __team_queue_override_enabled_check(struct team *team)
 853 {
 854         struct team_port *port;
 855         bool enabled = false;
 856
 857         list_for_each_entry(port, &team->port_list, list) {
 858                 if (port->queue_id) {
 859                         enabled = true;
 860                         break;
 861                 }
 862         }
 863         if (enabled == team->queue_override_enabled)
 864                 return;
 865         netdev_dbg(team->dev, "%s queue override\n",
 866                    enabled ? "Enabling" : "Disabling");
 867         team->queue_override_enabled = enabled;
 868 }
 869
 870 static void team_queue_override_port_prio_changed(struct team *team,
 871                                                   struct team_port *port)
 872 {
 873         if (!port->queue_id || team_port_enabled(port))
 874                 return;
 875         __team_queue_override_port_del(team, port);
 876         __team_queue_override_port_add(team, port);
 877         __team_queue_override_enabled_check(team);
 878 }
 879
 880 static void team_queue_override_port_change_queue_id(struct team *team,
 881                                                      struct team_port *port,
 882                                                      u16 new_queue_id)
 883 {
 884         if (team_port_enabled(port)) {
 885                 __team_queue_override_port_del(team, port);
 886                 port->queue_id = new_queue_id;
 887                 __team_queue_override_port_add(team, port);
 888                 __team_queue_override_enabled_check(team);
 889         } else {
 890                 port->queue_id = new_queue_id;
 891         }
 892 }
 893
 894 static void team_queue_override_port_add(struct team *team,
 895                                          struct team_port *port)
 896 {
 897         __team_queue_override_port_add(team, port);
 898         __team_queue_override_enabled_check(team);
 899 }
 900
 901 static void team_queue_override_port_del(struct team *team,
 902                                          struct team_port *port)
 903 {
 904         __team_queue_override_port_del(team, port);
 905         __team_queue_override_enabled_check(team);
 906 }
 907
 908
 909 /****************
 910  * Port handling
 911  ****************/
 912
 913 static bool team_port_find(const struct team *team,
 914                            const struct team_port *port)
 915 {
 916         struct team_port *cur;
 917
 918         list_for_each_entry(cur, &team->port_list, list)
 919                 if (cur == port)
 920                         return true;
 921         return false;
 922 }
 923
 924 /*
 925  * Enable/disable port by adding to enabled port hashlist and setting
 926  * port->index (Might be racy so reader could see incorrect ifindex when
 927  * processing a flying packet, but that is not a problem). Write guarded
 928  * by team->lock.
 929  */
 930 static void team_port_enable(struct team *team,
 931                              struct team_port *port)
 932 {
 933         if (team_port_enabled(port))
 934                 return;
 935         port->index = team->en_port_count++;
 936         hlist_add_head_rcu(&port->hlist,
 937                            team_port_index_hash(team, port->index));
 938         team_adjust_ops(team);
 939         team_queue_override_port_add(team, port);
 940         if (team->ops.port_enabled)
 941                 team->ops.port_enabled(team, port);
 942         team_notify_peers(team);
 943         team_mcast_rejoin(team);
 944         team_lower_state_changed(port);
 945 }
 946
 947 static void __reconstruct_port_hlist(struct team *team, int rm_index)
 948 {
 949         int i;
 950         struct team_port *port;
 951
 952         for (i = rm_index + 1; i < team->en_port_count; i++) {
 953                 port = team_get_port_by_index(team, i);
 954                 hlist_del_rcu(&port->hlist);
 955                 port->index--;
 956                 hlist_add_head_rcu(&port->hlist,
 957                                    team_port_index_hash(team, port->index));
 958         }
 959 }
 960
 961 static void team_port_disable(struct team *team,
 962                               struct team_port *port)
 963 {
 964         if (!team_port_enabled(port))
 965                 return;
 966         if (team->ops.port_disabled)
 967                 team->ops.port_disabled(team, port);
 968         hlist_del_rcu(&port->hlist);
 969         __reconstruct_port_hlist(team, port->index);
 970         port->index = -1;
 971         team->en_port_count--;
 972         team_queue_override_port_del(team, port);
 973         team_adjust_ops(team);
 974         team_lower_state_changed(port);
 975 }
 976
 977 #define TEAM_VLAN_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
 978                             NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
 979                             NETIF_F_HIGHDMA | NETIF_F_LRO)
 980
 981 #define TEAM_ENC_FEATURES       (NETIF_F_HW_CSUM | NETIF_F_SG | \
 982                                  NETIF_F_RXCSUM | NETIF_F_ALL_TSO)
 983
 984 static void __team_compute_features(struct team *team)
 985 {
 986         struct team_port *port;
 987         netdev_features_t vlan_features = TEAM_VLAN_FEATURES &
 988                                           NETIF_F_ALL_FOR_ALL;
 989         netdev_features_t enc_features  = TEAM_ENC_FEATURES;
 990         unsigned short max_hard_header_len = ETH_HLEN;
 991         unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE |
 992                                         IFF_XMIT_DST_RELEASE_PERM;
 993
 994         list_for_each_entry(port, &team->port_list, list) {
 995                 vlan_features = netdev_increment_features(vlan_features,
 996                                         port->dev->vlan_features,
 997                                         TEAM_VLAN_FEATURES);
 998                 enc_features =
 999                         netdev_increment_features(enc_features,
1000                                                   port->dev->hw_enc_features,
1001                                                   TEAM_ENC_FEATURES);
1002
1003
1004                 dst_release_flag &= port->dev->priv_flags;
1005                 if (port->dev->hard_header_len > max_hard_header_len)
1006                         max_hard_header_len = port->dev->hard_header_len;
1007         }
1008
1009         team->dev->vlan_features = vlan_features;
1010         team->dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL |
1011                                      NETIF_F_GSO_UDP_L4;
1012         team->dev->hard_header_len = max_hard_header_len;
1013
1014         team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
1015         if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
1016                 team->dev->priv_flags |= IFF_XMIT_DST_RELEASE;
1017 }
1018
1019 static void team_compute_features(struct team *team)
1020 {
1021         mutex_lock(&team->lock);
1022         __team_compute_features(team);
1023         mutex_unlock(&team->lock);
1024         netdev_change_features(team->dev);
1025 }
1026
1027 static int team_port_enter(struct team *team, struct team_port *port)
1028 {
1029         int err = 0;
1030
1031         dev_hold(team->dev);
1032         if (team->ops.port_enter) {
1033                 err = team->ops.port_enter(team, port);
1034                 if (err) {
1035                         netdev_err(team->dev, "Device %s failed to enter team mode\n",
1036                                    port->dev->name);
1037                         goto err_port_enter;
1038                 }
1039         }
1040
1041         return 0;
1042
1043 err_port_enter:
1044         dev_put(team->dev);
1045
1046         return err;
1047 }
1048
1049 static void team_port_leave(struct team *team, struct team_port *port)
1050 {
1051         if (team->ops.port_leave)
1052                 team->ops.port_leave(team, port);
1053         dev_put(team->dev);
1054 }
1055
1056 #ifdef CONFIG_NET_POLL_CONTROLLER
1057 static int __team_port_enable_netpoll(struct team_port *port)
1058 {
1059         struct netpoll *np;
1060         int err;
1061
1062         np = kzalloc(sizeof(*np), GFP_KERNEL);
1063         if (!np)
1064                 return -ENOMEM;
1065
1066         err = __netpoll_setup(np, port->dev);
1067         if (err) {
1068                 kfree(np);
1069                 return err;
1070         }
1071         port->np = np;
1072         return err;
1073 }
1074
1075 static int team_port_enable_netpoll(struct team_port *port)
1076 {
1077         if (!port->team->dev->npinfo)
1078                 return 0;
1079
1080         return __team_port_enable_netpoll(port);
1081 }
1082
1083 static void team_port_disable_netpoll(struct team_port *port)
1084 {
1085         struct netpoll *np = port->np;
1086
1087         if (!np)
1088                 return;
1089         port->np = NULL;
1090
1091         __netpoll_free(np);
1092 }
1093 #else
1094 static int team_port_enable_netpoll(struct team_port *port)
1095 {
1096         return 0;
1097 }
1098 static void team_port_disable_netpoll(struct team_port *port)
1099 {
1100 }
1101 #endif
1102
1103 static int team_upper_dev_link(struct team *team, struct team_port *port,
1104                                struct netlink_ext_ack *extack)
1105 {
1106         struct netdev_lag_upper_info lag_upper_info;
1107         int err;
1108
1109         lag_upper_info.tx_type = team->mode->lag_tx_type;
1110         lag_upper_info.hash_type = NETDEV_LAG_HASH_UNKNOWN;
1111         err = netdev_master_upper_dev_link(port->dev, team->dev, NULL,
1112                                            &lag_upper_info, extack);
1113         if (err)
1114                 return err;
1115         port->dev->priv_flags |= IFF_TEAM_PORT;
1116         return 0;
1117 }
1118
1119 static void team_upper_dev_unlink(struct team *team, struct team_port *port)
1120 {
1121         netdev_upper_dev_unlink(port->dev, team->dev);
1122         port->dev->priv_flags &= ~IFF_TEAM_PORT;
1123 }
1124
1125 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1126 static int team_dev_type_check_change(struct net_device *dev,
1127                                       struct net_device *port_dev);
1128
1129 static int team_port_add(struct team *team, struct net_device *port_dev,
1130                          struct netlink_ext_ack *extack)
1131 {
1132         struct net_device *dev = team->dev;
1133         struct team_port *port;
1134         char *portname = port_dev->name;
1135         int err;
1136
1137         if (port_dev->flags & IFF_LOOPBACK) {
1138                 NL_SET_ERR_MSG(extack, "Loopback device can't be added as a team port");
1139                 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1140                            portname);
1141                 return -EINVAL;
1142         }
1143
1144         if (netif_is_team_port(port_dev)) {
1145                 NL_SET_ERR_MSG(extack, "Device is already a port of a team device");
1146                 netdev_err(dev, "Device %s is already a port "
1147                                 "of a team device\n", portname);
1148                 return -EBUSY;
1149         }
1150
1151         if (dev == port_dev) {
1152                 NL_SET_ERR_MSG(extack, "Cannot enslave team device to itself");
1153                 netdev_err(dev, "Cannot enslave team device to itself\n");
1154                 return -EINVAL;
1155         }
1156
1157         if (netdev_has_upper_dev(dev, port_dev)) {
1158                 NL_SET_ERR_MSG(extack, "Device is already an upper device of the team interface");
1159                 netdev_err(dev, "Device %s is already an upper device of the team interface\n",
1160                            portname);
1161                 return -EBUSY;
1162         }
1163
1164         if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1165             vlan_uses_dev(dev)) {
1166                 NL_SET_ERR_MSG(extack, "Device is VLAN challenged and team device has VLAN set up");
1167                 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1168                            portname);
1169                 return -EPERM;
1170         }
1171
1172         err = team_dev_type_check_change(dev, port_dev);
1173         if (err)
1174                 return err;
1175
1176         if (port_dev->flags & IFF_UP) {
1177                 NL_SET_ERR_MSG(extack, "Device is up. Set it down before adding it as a team port");
1178                 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1179                            portname);
1180                 return -EBUSY;
1181         }
1182
1183         port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1184                        GFP_KERNEL);
1185         if (!port)
1186                 return -ENOMEM;
1187
1188         port->dev = port_dev;
1189         port->team = team;
1190         INIT_LIST_HEAD(&port->qom_list);
1191
1192         port->orig.mtu = port_dev->mtu;
1193         err = dev_set_mtu(port_dev, dev->mtu);
1194         if (err) {
1195                 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1196                 goto err_set_mtu;
1197         }
1198
1199         memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1200
1201         err = team_port_enter(team, port);
1202         if (err) {
1203                 netdev_err(dev, "Device %s failed to enter team mode\n",
1204                            portname);
1205                 goto err_port_enter;
1206         }
1207
1208         err = dev_open(port_dev, extack);
1209         if (err) {
1210                 netdev_dbg(dev, "Device %s opening failed\n",
1211                            portname);
1212                 goto err_dev_open;
1213         }
1214
1215         err = vlan_vids_add_by_dev(port_dev, dev);
1216         if (err) {
1217                 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1218                                 portname);
1219                 goto err_vids_add;
1220         }
1221
1222         err = team_port_enable_netpoll(port);
1223         if (err) {
1224                 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1225                            portname);
1226                 goto err_enable_netpoll;
1227         }
1228
1229         if (!(dev->features & NETIF_F_LRO))
1230                 dev_disable_lro(port_dev);
1231
1232         err = netdev_rx_handler_register(port_dev, team_handle_frame,
1233                                          port);
1234         if (err) {
1235                 netdev_err(dev, "Device %s failed to register rx_handler\n",
1236                            portname);
1237                 goto err_handler_register;
1238         }
1239
1240         err = team_upper_dev_link(team, port, extack);
1241         if (err) {
1242                 netdev_err(dev, "Device %s failed to set upper link\n",
1243                            portname);
1244                 goto err_set_upper_link;
1245         }
1246
1247         err = __team_option_inst_add_port(team, port);
1248         if (err) {
1249                 netdev_err(dev, "Device %s failed to add per-port options\n",
1250                            portname);
1251                 goto err_option_port_add;
1252         }
1253
1254         /* set promiscuity level to new slave */
1255         if (dev->flags & IFF_PROMISC) {
1256                 err = dev_set_promiscuity(port_dev, 1);
1257                 if (err)
1258                         goto err_set_slave_promisc;
1259         }
1260
1261         /* set allmulti level to new slave */
1262         if (dev->flags & IFF_ALLMULTI) {
1263                 err = dev_set_allmulti(port_dev, 1);
1264                 if (err) {
1265                         if (dev->flags & IFF_PROMISC)
1266                                 dev_set_promiscuity(port_dev, -1);
1267                         goto err_set_slave_promisc;
1268                 }
1269         }
1270
1271         netif_addr_lock_bh(dev);
1272         dev_uc_sync_multiple(port_dev, dev);
1273         dev_mc_sync_multiple(port_dev, dev);
1274         netif_addr_unlock_bh(dev);
1275
1276         port->index = -1;
1277         list_add_tail_rcu(&port->list, &team->port_list);
1278         team_port_enable(team, port);
1279         __team_compute_features(team);
1280         __team_port_change_port_added(port, !!netif_oper_up(port_dev));
1281         __team_options_change_check(team);
1282
1283         netdev_info(dev, "Port device %s added\n", portname);
1284
1285         return 0;
1286
1287 err_set_slave_promisc:
1288         __team_option_inst_del_port(team, port);
1289
1290 err_option_port_add:
1291         team_upper_dev_unlink(team, port);
1292
1293 err_set_upper_link:
1294         netdev_rx_handler_unregister(port_dev);
1295
1296 err_handler_register:
1297         team_port_disable_netpoll(port);
1298
1299 err_enable_netpoll:
1300         vlan_vids_del_by_dev(port_dev, dev);
1301
1302 err_vids_add:
1303         dev_close(port_dev);
1304
1305 err_dev_open:
1306         team_port_leave(team, port);
1307         team_port_set_orig_dev_addr(port);
1308
1309 err_port_enter:
1310         dev_set_mtu(port_dev, port->orig.mtu);
1311
1312 err_set_mtu:
1313         kfree(port);
1314
1315         return err;
1316 }
1317
1318 static void __team_port_change_port_removed(struct team_port *port);
1319
1320 static int team_port_del(struct team *team, struct net_device *port_dev)
1321 {
1322         struct net_device *dev = team->dev;
1323         struct team_port *port;
1324         char *portname = port_dev->name;
1325
1326         port = team_port_get_rtnl(port_dev);
1327         if (!port || !team_port_find(team, port)) {
1328                 netdev_err(dev, "Device %s does not act as a port of this team\n",
1329                            portname);
1330                 return -ENOENT;
1331         }
1332
1333         team_port_disable(team, port);
1334         list_del_rcu(&port->list);
1335
1336         if (dev->flags & IFF_PROMISC)
1337                 dev_set_promiscuity(port_dev, -1);
1338         if (dev->flags & IFF_ALLMULTI)
1339                 dev_set_allmulti(port_dev, -1);
1340
1341         team_upper_dev_unlink(team, port);
1342         netdev_rx_handler_unregister(port_dev);
1343         team_port_disable_netpoll(port);
1344         vlan_vids_del_by_dev(port_dev, dev);
1345         dev_uc_unsync(port_dev, dev);
1346         dev_mc_unsync(port_dev, dev);
1347         dev_close(port_dev);
1348         team_port_leave(team, port);
1349
1350         __team_option_inst_mark_removed_port(team, port);
1351         __team_options_change_check(team);
1352         __team_option_inst_del_port(team, port);
1353         __team_port_change_port_removed(port);
1354
1355         team_port_set_orig_dev_addr(port);
1356         dev_set_mtu(port_dev, port->orig.mtu);
1357         kfree_rcu(port, rcu);
1358         netdev_info(dev, "Port device %s removed\n", portname);
1359         __team_compute_features(team);
1360
1361         return 0;
1362 }
1363
1364
1365 /*****************
1366  * Net device ops
1367  *****************/
1368
1369 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1370 {
1371         ctx->data.str_val = team->mode->kind;
1372         return 0;
1373 }
1374
1375 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1376 {
1377         return team_change_mode(team, ctx->data.str_val);
1378 }
1379
1380 static int team_notify_peers_count_get(struct team *team,
1381                                        struct team_gsetter_ctx *ctx)
1382 {
1383         ctx->data.u32_val = team->notify_peers.count;
1384         return 0;
1385 }
1386
1387 static int team_notify_peers_count_set(struct team *team,
1388                                        struct team_gsetter_ctx *ctx)
1389 {
1390         team->notify_peers.count = ctx->data.u32_val;
1391         return 0;
1392 }
1393
1394 static int team_notify_peers_interval_get(struct team *team,
1395                                           struct team_gsetter_ctx *ctx)
1396 {
1397         ctx->data.u32_val = team->notify_peers.interval;
1398         return 0;
1399 }
1400
1401 static int team_notify_peers_interval_set(struct team *team,
1402                                           struct team_gsetter_ctx *ctx)
1403 {
1404         team->notify_peers.interval = ctx->data.u32_val;
1405         return 0;
1406 }
1407
1408 static int team_mcast_rejoin_count_get(struct team *team,
1409                                        struct team_gsetter_ctx *ctx)
1410 {
1411         ctx->data.u32_val = team->mcast_rejoin.count;
1412         return 0;
1413 }
1414
1415 static int team_mcast_rejoin_count_set(struct team *team,
1416                                        struct team_gsetter_ctx *ctx)
1417 {
1418         team->mcast_rejoin.count = ctx->data.u32_val;
1419         return 0;
1420 }
1421
1422 static int team_mcast_rejoin_interval_get(struct team *team,
1423                                           struct team_gsetter_ctx *ctx)
1424 {
1425         ctx->data.u32_val = team->mcast_rejoin.interval;
1426         return 0;
1427 }
1428
1429 static int team_mcast_rejoin_interval_set(struct team *team,
1430                                           struct team_gsetter_ctx *ctx)
1431 {
1432         team->mcast_rejoin.interval = ctx->data.u32_val;
1433         return 0;
1434 }
1435
1436 static int team_port_en_option_get(struct team *team,
1437                                    struct team_gsetter_ctx *ctx)
1438 {
1439         struct team_port *port = ctx->info->port;
1440
1441         ctx->data.bool_val = team_port_enabled(port);
1442         return 0;
1443 }
1444
1445 static int team_port_en_option_set(struct team *team,
1446                                    struct team_gsetter_ctx *ctx)
1447 {
1448         struct team_port *port = ctx->info->port;
1449
1450         if (ctx->data.bool_val)
1451                 team_port_enable(team, port);
1452         else
1453                 team_port_disable(team, port);
1454         return 0;
1455 }
1456
1457 static int team_user_linkup_option_get(struct team *team,
1458                                        struct team_gsetter_ctx *ctx)
1459 {
1460         struct team_port *port = ctx->info->port;
1461
1462         ctx->data.bool_val = port->user.linkup;
1463         return 0;
1464 }
1465
1466 static void __team_carrier_check(struct team *team);
1467
1468 static int team_user_linkup_option_set(struct team *team,
1469                                        struct team_gsetter_ctx *ctx)
1470 {
1471         struct team_port *port = ctx->info->port;
1472
1473         port->user.linkup = ctx->data.bool_val;
1474         team_refresh_port_linkup(port);
1475         __team_carrier_check(port->team);
1476         return 0;
1477 }
1478
1479 static int team_user_linkup_en_option_get(struct team *team,
1480                                           struct team_gsetter_ctx *ctx)
1481 {
1482         struct team_port *port = ctx->info->port;
1483
1484         ctx->data.bool_val = port->user.linkup_enabled;
1485         return 0;
1486 }
1487
1488 static int team_user_linkup_en_option_set(struct team *team,
1489                                           struct team_gsetter_ctx *ctx)
1490 {
1491         struct team_port *port = ctx->info->port;
1492
1493         port->user.linkup_enabled = ctx->data.bool_val;
1494         team_refresh_port_linkup(port);
1495         __team_carrier_check(port->team);
1496         return 0;
1497 }
1498
1499 static int team_priority_option_get(struct team *team,
1500                                     struct team_gsetter_ctx *ctx)
1501 {
1502         struct team_port *port = ctx->info->port;
1503
1504         ctx->data.s32_val = port->priority;
1505         return 0;
1506 }
1507
1508 static int team_priority_option_set(struct team *team,
1509                                     struct team_gsetter_ctx *ctx)
1510 {
1511         struct team_port *port = ctx->info->port;
1512         s32 priority = ctx->data.s32_val;
1513
1514         if (port->priority == priority)
1515                 return 0;
1516         port->priority = priority;
1517         team_queue_override_port_prio_changed(team, port);
1518         return 0;
1519 }
1520
1521 static int team_queue_id_option_get(struct team *team,
1522                                     struct team_gsetter_ctx *ctx)
1523 {
1524         struct team_port *port = ctx->info->port;
1525
1526         ctx->data.u32_val = port->queue_id;
1527         return 0;
1528 }
1529
1530 static int team_queue_id_option_set(struct team *team,
1531                                     struct team_gsetter_ctx *ctx)
1532 {
1533         struct team_port *port = ctx->info->port;
1534         u16 new_queue_id = ctx->data.u32_val;
1535
1536         if (port->queue_id == new_queue_id)
1537                 return 0;
1538         if (new_queue_id >= team->dev->real_num_tx_queues)
1539                 return -EINVAL;
1540         team_queue_override_port_change_queue_id(team, port, new_queue_id);
1541         return 0;
1542 }
1543
1544 static const struct team_option team_options[] = {
1545         {
1546                 .name = "mode",
1547                 .type = TEAM_OPTION_TYPE_STRING,
1548                 .getter = team_mode_option_get,
1549                 .setter = team_mode_option_set,
1550         },
1551         {
1552                 .name = "notify_peers_count",
1553                 .type = TEAM_OPTION_TYPE_U32,
1554                 .getter = team_notify_peers_count_get,
1555                 .setter = team_notify_peers_count_set,
1556         },
1557         {
1558                 .name = "notify_peers_interval",
1559                 .type = TEAM_OPTION_TYPE_U32,
1560                 .getter = team_notify_peers_interval_get,
1561                 .setter = team_notify_peers_interval_set,
1562         },
1563         {
1564                 .name = "mcast_rejoin_count",
1565                 .type = TEAM_OPTION_TYPE_U32,
1566                 .getter = team_mcast_rejoin_count_get,
1567                 .setter = team_mcast_rejoin_count_set,
1568         },
1569         {
1570                 .name = "mcast_rejoin_interval",
1571                 .type = TEAM_OPTION_TYPE_U32,
1572                 .getter = team_mcast_rejoin_interval_get,
1573                 .setter = team_mcast_rejoin_interval_set,
1574         },
1575         {
1576                 .name = "enabled",
1577                 .type = TEAM_OPTION_TYPE_BOOL,
1578                 .per_port = true,
1579                 .getter = team_port_en_option_get,
1580                 .setter = team_port_en_option_set,
1581         },
1582         {
1583                 .name = "user_linkup",
1584                 .type = TEAM_OPTION_TYPE_BOOL,
1585                 .per_port = true,
1586                 .getter = team_user_linkup_option_get,
1587                 .setter = team_user_linkup_option_set,
1588         },
1589         {
1590                 .name = "user_linkup_enabled",
1591                 .type = TEAM_OPTION_TYPE_BOOL,
1592                 .per_port = true,
1593                 .getter = team_user_linkup_en_option_get,
1594                 .setter = team_user_linkup_en_option_set,
1595         },
1596         {
1597                 .name = "priority",
1598                 .type = TEAM_OPTION_TYPE_S32,
1599                 .per_port = true,
1600                 .getter = team_priority_option_get,
1601                 .setter = team_priority_option_set,
1602         },
1603         {
1604                 .name = "queue_id",
1605                 .type = TEAM_OPTION_TYPE_U32,
1606                 .per_port = true,
1607                 .getter = team_queue_id_option_get,
1608                 .setter = team_queue_id_option_set,
1609         },
1610 };
1611
1612
1613 static int team_init(struct net_device *dev)
1614 {
1615         struct team *team = netdev_priv(dev);
1616         int i;
1617         int err;
1618
1619         team->dev = dev;
1620         mutex_init(&team->lock);
1621         team_set_no_mode(team);
1622
1623         team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1624         if (!team->pcpu_stats)
1625                 return -ENOMEM;
1626
1627         for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1628                 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1629         INIT_LIST_HEAD(&team->port_list);
1630         err = team_queue_override_init(team);
1631         if (err)
1632                 goto err_team_queue_override_init;
1633
1634         team_adjust_ops(team);
1635
1636         INIT_LIST_HEAD(&team->option_list);
1637         INIT_LIST_HEAD(&team->option_inst_list);
1638
1639         team_notify_peers_init(team);
1640         team_mcast_rejoin_init(team);
1641
1642         err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1643         if (err)
1644                 goto err_options_register;
1645         netif_carrier_off(dev);
1646
1647         netdev_lockdep_set_classes(dev);
1648
1649         return 0;
1650
1651 err_options_register:
1652         team_mcast_rejoin_fini(team);
1653         team_notify_peers_fini(team);
1654         team_queue_override_fini(team);
1655 err_team_queue_override_init:
1656         free_percpu(team->pcpu_stats);
1657
1658         return err;
1659 }
1660
1661 static void team_uninit(struct net_device *dev)
1662 {
1663         struct team *team = netdev_priv(dev);
1664         struct team_port *port;
1665         struct team_port *tmp;
1666
1667         mutex_lock(&team->lock);
1668         list_for_each_entry_safe(port, tmp, &team->port_list, list)
1669                 team_port_del(team, port->dev);
1670
1671         __team_change_mode(team, NULL); /* cleanup */
1672         __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1673         team_mcast_rejoin_fini(team);
1674         team_notify_peers_fini(team);
1675         team_queue_override_fini(team);
1676         mutex_unlock(&team->lock);
1677         netdev_change_features(dev);
1678 }
1679
1680 static void team_destructor(struct net_device *dev)
1681 {
1682         struct team *team = netdev_priv(dev);
1683
1684         free_percpu(team->pcpu_stats);
1685 }
1686
1687 static int team_open(struct net_device *dev)
1688 {
1689         return 0;
1690 }
1691
1692 static int team_close(struct net_device *dev)
1693 {
1694         return 0;
1695 }
1696
1697 /*
1698  * note: already called with rcu_read_lock
1699  */
1700 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1701 {
1702         struct team *team = netdev_priv(dev);
1703         bool tx_success;
1704         unsigned int len = skb->len;
1705
1706         tx_success = team_queue_override_transmit(team, skb);
1707         if (!tx_success)
1708                 tx_success = team->ops.transmit(team, skb);
1709         if (tx_success) {
1710                 struct team_pcpu_stats *pcpu_stats;
1711
1712                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1713                 u64_stats_update_begin(&pcpu_stats->syncp);
1714                 pcpu_stats->tx_packets++;
1715                 pcpu_stats->tx_bytes += len;
1716                 u64_stats_update_end(&pcpu_stats->syncp);
1717         } else {
1718                 this_cpu_inc(team->pcpu_stats->tx_dropped);
1719         }
1720
1721         return NETDEV_TX_OK;
1722 }
1723
1724 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1725                              struct net_device *sb_dev)
1726 {
1727         /*
1728          * This helper function exists to help dev_pick_tx get the correct
1729          * destination queue.  Using a helper function skips a call to
1730          * skb_tx_hash and will put the skbs in the queue we expect on their
1731          * way down to the team driver.
1732          */
1733         u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1734
1735         /*
1736          * Save the original txq to restore before passing to the driver
1737          */
1738         qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1739
1740         if (unlikely(txq >= dev->real_num_tx_queues)) {
1741                 do {
1742                         txq -= dev->real_num_tx_queues;
1743                 } while (txq >= dev->real_num_tx_queues);
1744         }
1745         return txq;
1746 }
1747
1748 static void team_change_rx_flags(struct net_device *dev, int change)
1749 {
1750         struct team *team = netdev_priv(dev);
1751         struct team_port *port;
1752         int inc;
1753
1754         rcu_read_lock();
1755         list_for_each_entry_rcu(port, &team->port_list, list) {
1756                 if (change & IFF_PROMISC) {
1757                         inc = dev->flags & IFF_PROMISC ? 1 : -1;
1758                         dev_set_promiscuity(port->dev, inc);
1759                 }
1760                 if (change & IFF_ALLMULTI) {
1761                         inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1762                         dev_set_allmulti(port->dev, inc);
1763                 }
1764         }
1765         rcu_read_unlock();
1766 }
1767
1768 static void team_set_rx_mode(struct net_device *dev)
1769 {
1770         struct team *team = netdev_priv(dev);
1771         struct team_port *port;
1772
1773         rcu_read_lock();
1774         list_for_each_entry_rcu(port, &team->port_list, list) {
1775                 dev_uc_sync_multiple(port->dev, dev);
1776                 dev_mc_sync_multiple(port->dev, dev);
1777         }
1778         rcu_read_unlock();
1779 }
1780
1781 static int team_set_mac_address(struct net_device *dev, void *p)
1782 {
1783         struct sockaddr *addr = p;
1784         struct team *team = netdev_priv(dev);
1785         struct team_port *port;
1786
1787         if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1788                 return -EADDRNOTAVAIL;
1789         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1790         mutex_lock(&team->lock);
1791         list_for_each_entry(port, &team->port_list, list)
1792                 if (team->ops.port_change_dev_addr)
1793                         team->ops.port_change_dev_addr(team, port);
1794         mutex_unlock(&team->lock);
1795         return 0;
1796 }
1797
1798 static int team_change_mtu(struct net_device *dev, int new_mtu)
1799 {
1800         struct team *team = netdev_priv(dev);
1801         struct team_port *port;
1802         int err;
1803
1804         /*
1805          * Alhough this is reader, it's guarded by team lock. It's not possible
1806          * to traverse list in reverse under rcu_read_lock
1807          */
1808         mutex_lock(&team->lock);
1809         team->port_mtu_change_allowed = true;
1810         list_for_each_entry(port, &team->port_list, list) {
1811                 err = dev_set_mtu(port->dev, new_mtu);
1812                 if (err) {
1813                         netdev_err(dev, "Device %s failed to change mtu",
1814                                    port->dev->name);
1815                         goto unwind;
1816                 }
1817         }
1818         team->port_mtu_change_allowed = false;
1819         mutex_unlock(&team->lock);
1820
1821         dev->mtu = new_mtu;
1822
1823         return 0;
1824
1825 unwind:
1826         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1827                 dev_set_mtu(port->dev, dev->mtu);
1828         team->port_mtu_change_allowed = false;
1829         mutex_unlock(&team->lock);
1830
1831         return err;
1832 }
1833
1834 static void
1835 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1836 {
1837         struct team *team = netdev_priv(dev);
1838         struct team_pcpu_stats *p;
1839         u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1840         u32 rx_dropped = 0, tx_dropped = 0, rx_nohandler = 0;
1841         unsigned int start;
1842         int i;
1843
1844         for_each_possible_cpu(i) {
1845                 p = per_cpu_ptr(team->pcpu_stats, i);
1846                 do {
1847                         start = u64_stats_fetch_begin_irq(&p->syncp);
1848                         rx_packets      = p->rx_packets;
1849                         rx_bytes        = p->rx_bytes;
1850                         rx_multicast    = p->rx_multicast;
1851                         tx_packets      = p->tx_packets;
1852                         tx_bytes        = p->tx_bytes;
1853                 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
1854
1855                 stats->rx_packets       += rx_packets;
1856                 stats->rx_bytes         += rx_bytes;
1857                 stats->multicast        += rx_multicast;
1858                 stats->tx_packets       += tx_packets;
1859                 stats->tx_bytes         += tx_bytes;
1860                 /*
1861                  * rx_dropped, tx_dropped & rx_nohandler are u32,
1862                  * updated without syncp protection.
1863                  */
1864                 rx_dropped      += p->rx_dropped;
1865                 tx_dropped      += p->tx_dropped;
1866                 rx_nohandler    += p->rx_nohandler;
1867         }
1868         stats->rx_dropped       = rx_dropped;
1869         stats->tx_dropped       = tx_dropped;
1870         stats->rx_nohandler     = rx_nohandler;
1871 }
1872
1873 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1874 {
1875         struct team *team = netdev_priv(dev);
1876         struct team_port *port;
1877         int err;
1878
1879         /*
1880          * Alhough this is reader, it's guarded by team lock. It's not possible
1881          * to traverse list in reverse under rcu_read_lock
1882          */
1883         mutex_lock(&team->lock);
1884         list_for_each_entry(port, &team->port_list, list) {
1885                 err = vlan_vid_add(port->dev, proto, vid);
1886                 if (err)
1887                         goto unwind;
1888         }
1889         mutex_unlock(&team->lock);
1890
1891         return 0;
1892
1893 unwind:
1894         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1895                 vlan_vid_del(port->dev, proto, vid);
1896         mutex_unlock(&team->lock);
1897
1898         return err;
1899 }
1900
1901 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1902 {
1903         struct team *team = netdev_priv(dev);
1904         struct team_port *port;
1905
1906         mutex_lock(&team->lock);
1907         list_for_each_entry(port, &team->port_list, list)
1908                 vlan_vid_del(port->dev, proto, vid);
1909         mutex_unlock(&team->lock);
1910
1911         return 0;
1912 }
1913
1914 #ifdef CONFIG_NET_POLL_CONTROLLER
1915 static void team_poll_controller(struct net_device *dev)
1916 {
1917 }
1918
1919 static void __team_netpoll_cleanup(struct team *team)
1920 {
1921         struct team_port *port;
1922
1923         list_for_each_entry(port, &team->port_list, list)
1924                 team_port_disable_netpoll(port);
1925 }
1926
1927 static void team_netpoll_cleanup(struct net_device *dev)
1928 {
1929         struct team *team = netdev_priv(dev);
1930
1931         mutex_lock(&team->lock);
1932         __team_netpoll_cleanup(team);
1933         mutex_unlock(&team->lock);
1934 }
1935
1936 static int team_netpoll_setup(struct net_device *dev,
1937                               struct netpoll_info *npifo)
1938 {
1939         struct team *team = netdev_priv(dev);
1940         struct team_port *port;
1941         int err = 0;
1942
1943         mutex_lock(&team->lock);
1944         list_for_each_entry(port, &team->port_list, list) {
1945                 err = __team_port_enable_netpoll(port);
1946                 if (err) {
1947                         __team_netpoll_cleanup(team);
1948                         break;
1949                 }
1950         }
1951         mutex_unlock(&team->lock);
1952         return err;
1953 }
1954 #endif
1955
1956 static int team_add_slave(struct net_device *dev, struct net_device *port_dev,
1957                           struct netlink_ext_ack *extack)
1958 {
1959         struct team *team = netdev_priv(dev);
1960         int err;
1961
1962         mutex_lock(&team->lock);
1963         err = team_port_add(team, port_dev, extack);
1964         mutex_unlock(&team->lock);
1965
1966         if (!err)
1967                 netdev_change_features(dev);
1968
1969         return err;
1970 }
1971
1972 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1973 {
1974         struct team *team = netdev_priv(dev);
1975         int err;
1976
1977         mutex_lock(&team->lock);
1978         err = team_port_del(team, port_dev);
1979         mutex_unlock(&team->lock);
1980
1981         if (!err)
1982                 netdev_change_features(dev);
1983
1984         return err;
1985 }
1986
1987 static netdev_features_t team_fix_features(struct net_device *dev,
1988                                            netdev_features_t features)
1989 {
1990         struct team_port *port;
1991         struct team *team = netdev_priv(dev);
1992         netdev_features_t mask;
1993
1994         mask = features;
1995         features &= ~NETIF_F_ONE_FOR_ALL;
1996         features |= NETIF_F_ALL_FOR_ALL;
1997
1998         rcu_read_lock();
1999         list_for_each_entry_rcu(port, &team->port_list, list) {
2000                 features = netdev_increment_features(features,
2001                                                      port->dev->features,
2002                                                      mask);
2003         }
2004         rcu_read_unlock();
2005
2006         features = netdev_add_tso_features(features, mask);
2007
2008         return features;
2009 }
2010
2011 static int team_change_carrier(struct net_device *dev, bool new_carrier)
2012 {
2013         struct team *team = netdev_priv(dev);
2014
2015         team->user_carrier_enabled = true;
2016
2017         if (new_carrier)
2018                 netif_carrier_on(dev);
2019         else
2020                 netif_carrier_off(dev);
2021         return 0;
2022 }
2023
2024 static const struct net_device_ops team_netdev_ops = {
2025         .ndo_init               = team_init,
2026         .ndo_uninit             = team_uninit,
2027         .ndo_open               = team_open,
2028         .ndo_stop               = team_close,
2029         .ndo_start_xmit         = team_xmit,
2030         .ndo_select_queue       = team_select_queue,
2031         .ndo_change_rx_flags    = team_change_rx_flags,
2032         .ndo_set_rx_mode        = team_set_rx_mode,
2033         .ndo_set_mac_address    = team_set_mac_address,
2034         .ndo_change_mtu         = team_change_mtu,
2035         .ndo_get_stats64        = team_get_stats64,
2036         .ndo_vlan_rx_add_vid    = team_vlan_rx_add_vid,
2037         .ndo_vlan_rx_kill_vid   = team_vlan_rx_kill_vid,
2038 #ifdef CONFIG_NET_POLL_CONTROLLER
2039         .ndo_poll_controller    = team_poll_controller,
2040         .ndo_netpoll_setup      = team_netpoll_setup,
2041         .ndo_netpoll_cleanup    = team_netpoll_cleanup,
2042 #endif
2043         .ndo_add_slave          = team_add_slave,
2044         .ndo_del_slave          = team_del_slave,
2045         .ndo_fix_features       = team_fix_features,
2046         .ndo_change_carrier     = team_change_carrier,
2047         .ndo_features_check     = passthru_features_check,
2048 };
2049
2050 /***********************
2051  * ethtool interface
2052  ***********************/
2053
2054 static void team_ethtool_get_drvinfo(struct net_device *dev,
2055                                      struct ethtool_drvinfo *drvinfo)
2056 {
2057         strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
2058         strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2059 }
2060
2061 static const struct ethtool_ops team_ethtool_ops = {
2062         .get_drvinfo            = team_ethtool_get_drvinfo,
2063         .get_link               = ethtool_op_get_link,
2064 };
2065
2066 /***********************
2067  * rt netlink interface
2068  ***********************/
2069
2070 static void team_setup_by_port(struct net_device *dev,
2071                                struct net_device *port_dev)
2072 {
2073         dev->header_ops = port_dev->header_ops;
2074         dev->type = port_dev->type;
2075         dev->hard_header_len = port_dev->hard_header_len;
2076         dev->addr_len = port_dev->addr_len;
2077         dev->mtu = port_dev->mtu;
2078         memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2079         eth_hw_addr_inherit(dev, port_dev);
2080 }
2081
2082 static int team_dev_type_check_change(struct net_device *dev,
2083                                       struct net_device *port_dev)
2084 {
2085         struct team *team = netdev_priv(dev);
2086         char *portname = port_dev->name;
2087         int err;
2088
2089         if (dev->type == port_dev->type)
2090                 return 0;
2091         if (!list_empty(&team->port_list)) {
2092                 netdev_err(dev, "Device %s is of different type\n", portname);
2093                 return -EBUSY;
2094         }
2095         err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2096         err = notifier_to_errno(err);
2097         if (err) {
2098                 netdev_err(dev, "Refused to change device type\n");
2099                 return err;
2100         }
2101         dev_uc_flush(dev);
2102         dev_mc_flush(dev);
2103         team_setup_by_port(dev, port_dev);
2104         call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2105         return 0;
2106 }
2107
2108 static void team_setup(struct net_device *dev)
2109 {
2110         ether_setup(dev);
2111         dev->max_mtu = ETH_MAX_MTU;
2112
2113         dev->netdev_ops = &team_netdev_ops;
2114         dev->ethtool_ops = &team_ethtool_ops;
2115         dev->needs_free_netdev = true;
2116         dev->priv_destructor = team_destructor;
2117         dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2118         dev->priv_flags |= IFF_NO_QUEUE;
2119         dev->priv_flags |= IFF_TEAM;
2120
2121         /*
2122          * Indicate we support unicast address filtering. That way core won't
2123          * bring us to promisc mode in case a unicast addr is added.
2124          * Let this up to underlay drivers.
2125          */
2126         dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2127
2128         dev->features |= NETIF_F_LLTX;
2129         dev->features |= NETIF_F_GRO;
2130
2131         /* Don't allow team devices to change network namespaces. */
2132         dev->features |= NETIF_F_NETNS_LOCAL;
2133
2134         dev->hw_features = TEAM_VLAN_FEATURES |
2135                            NETIF_F_HW_VLAN_CTAG_TX |
2136                            NETIF_F_HW_VLAN_CTAG_RX |
2137                            NETIF_F_HW_VLAN_CTAG_FILTER;
2138
2139         dev->hw_features |= NETIF_F_GSO_ENCAP_ALL | NETIF_F_GSO_UDP_L4;
2140         dev->features |= dev->hw_features;
2141 }
2142
2143 static int team_newlink(struct net *src_net, struct net_device *dev,
2144                         struct nlattr *tb[], struct nlattr *data[],
2145                         struct netlink_ext_ack *extack)
2146 {
2147         if (tb[IFLA_ADDRESS] == NULL)
2148                 eth_hw_addr_random(dev);
2149
2150         return register_netdevice(dev);
2151 }
2152
2153 static int team_validate(struct nlattr *tb[], struct nlattr *data[],
2154                          struct netlink_ext_ack *extack)
2155 {
2156         if (tb[IFLA_ADDRESS]) {
2157                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2158                         return -EINVAL;
2159                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2160                         return -EADDRNOTAVAIL;
2161         }
2162         return 0;
2163 }
2164
2165 static unsigned int team_get_num_tx_queues(void)
2166 {
2167         return TEAM_DEFAULT_NUM_TX_QUEUES;
2168 }
2169
2170 static unsigned int team_get_num_rx_queues(void)
2171 {
2172         return TEAM_DEFAULT_NUM_RX_QUEUES;
2173 }
2174
2175 static struct rtnl_link_ops team_link_ops __read_mostly = {
2176         .kind                   = DRV_NAME,
2177         .priv_size              = sizeof(struct team),
2178         .setup                  = team_setup,
2179         .newlink                = team_newlink,
2180         .validate               = team_validate,
2181         .get_num_tx_queues      = team_get_num_tx_queues,
2182         .get_num_rx_queues      = team_get_num_rx_queues,
2183 };
2184
2185
2186 /***********************************
2187  * Generic netlink custom interface
2188  ***********************************/
2189
2190 static struct genl_family team_nl_family;
2191
2192 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2193         [TEAM_ATTR_UNSPEC]                      = { .type = NLA_UNSPEC, },
2194         [TEAM_ATTR_TEAM_IFINDEX]                = { .type = NLA_U32 },
2195         [TEAM_ATTR_LIST_OPTION]                 = { .type = NLA_NESTED },
2196         [TEAM_ATTR_LIST_PORT]                   = { .type = NLA_NESTED },
2197 };
2198
2199 static const struct nla_policy
2200 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2201         [TEAM_ATTR_OPTION_UNSPEC]               = { .type = NLA_UNSPEC, },
2202         [TEAM_ATTR_OPTION_NAME] = {
2203                 .type = NLA_STRING,
2204                 .len = TEAM_STRING_MAX_LEN,
2205         },
2206         [TEAM_ATTR_OPTION_CHANGED]              = { .type = NLA_FLAG },
2207         [TEAM_ATTR_OPTION_TYPE]                 = { .type = NLA_U8 },
2208         [TEAM_ATTR_OPTION_DATA]                 = { .type = NLA_BINARY },
2209 };
2210
2211 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2212 {
2213         struct sk_buff *msg;
2214         void *hdr;
2215         int err;
2216
2217         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2218         if (!msg)
2219                 return -ENOMEM;
2220
2221         hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2222                           &team_nl_family, 0, TEAM_CMD_NOOP);
2223         if (!hdr) {
2224                 err = -EMSGSIZE;
2225                 goto err_msg_put;
2226         }
2227
2228         genlmsg_end(msg, hdr);
2229
2230         return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2231
2232 err_msg_put:
2233         nlmsg_free(msg);
2234
2235         return err;
2236 }
2237
2238 /*
2239  * Netlink cmd functions should be locked by following two functions.
2240  * Since dev gets held here, that ensures dev won't disappear in between.
2241  */
2242 static struct team *team_nl_team_get(struct genl_info *info)
2243 {
2244         struct net *net = genl_info_net(info);
2245         int ifindex;
2246         struct net_device *dev;
2247         struct team *team;
2248
2249         if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2250                 return NULL;
2251
2252         ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2253         dev = dev_get_by_index(net, ifindex);
2254         if (!dev || dev->netdev_ops != &team_netdev_ops) {
2255                 if (dev)
2256                         dev_put(dev);
2257                 return NULL;
2258         }
2259
2260         team = netdev_priv(dev);
2261         mutex_lock(&team->lock);
2262         return team;
2263 }
2264
2265 static void team_nl_team_put(struct team *team)
2266 {
2267         mutex_unlock(&team->lock);
2268         dev_put(team->dev);
2269 }
2270
2271 typedef int team_nl_send_func_t(struct sk_buff *skb,
2272                                 struct team *team, u32 portid);
2273
2274 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2275 {
2276         return genlmsg_unicast(dev_net(team->dev), skb, portid);
2277 }
2278
2279 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2280                                        struct team_option_inst *opt_inst)
2281 {
2282         struct nlattr *option_item;
2283         struct team_option *option = opt_inst->option;
2284         struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2285         struct team_gsetter_ctx ctx;
2286         int err;
2287
2288         ctx.info = opt_inst_info;
2289         err = team_option_get(team, opt_inst, &ctx);
2290         if (err)
2291                 return err;
2292
2293         option_item = nla_nest_start_noflag(skb, TEAM_ATTR_ITEM_OPTION);
2294         if (!option_item)
2295                 return -EMSGSIZE;
2296
2297         if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2298                 goto nest_cancel;
2299         if (opt_inst_info->port &&
2300             nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2301                         opt_inst_info->port->dev->ifindex))
2302                 goto nest_cancel;
2303         if (opt_inst->option->array_size &&
2304             nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2305                         opt_inst_info->array_index))
2306                 goto nest_cancel;
2307
2308         switch (option->type) {
2309         case TEAM_OPTION_TYPE_U32:
2310                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2311                         goto nest_cancel;
2312                 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2313                         goto nest_cancel;
2314                 break;
2315         case TEAM_OPTION_TYPE_STRING:
2316                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2317                         goto nest_cancel;
2318                 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2319                                    ctx.data.str_val))
2320                         goto nest_cancel;
2321                 break;
2322         case TEAM_OPTION_TYPE_BINARY:
2323                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2324                         goto nest_cancel;
2325                 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2326                             ctx.data.bin_val.ptr))
2327                         goto nest_cancel;
2328                 break;
2329         case TEAM_OPTION_TYPE_BOOL:
2330                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2331                         goto nest_cancel;
2332                 if (ctx.data.bool_val &&
2333                     nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2334                         goto nest_cancel;
2335                 break;
2336         case TEAM_OPTION_TYPE_S32:
2337                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2338                         goto nest_cancel;
2339                 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2340                         goto nest_cancel;
2341                 break;
2342         default:
2343                 BUG();
2344         }
2345         if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2346                 goto nest_cancel;
2347         if (opt_inst->changed) {
2348                 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2349                         goto nest_cancel;
2350                 opt_inst->changed = false;
2351         }
2352         nla_nest_end(skb, option_item);
2353         return 0;
2354
2355 nest_cancel:
2356         nla_nest_cancel(skb, option_item);
2357         return -EMSGSIZE;
2358 }
2359
2360 static int __send_and_alloc_skb(struct sk_buff **pskb,
2361                                 struct team *team, u32 portid,
2362                                 team_nl_send_func_t *send_func)
2363 {
2364         int err;
2365
2366         if (*pskb) {
2367                 err = send_func(*pskb, team, portid);
2368                 if (err)
2369                         return err;
2370         }
2371         *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2372         if (!*pskb)
2373                 return -ENOMEM;
2374         return 0;
2375 }
2376
2377 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2378                                     int flags, team_nl_send_func_t *send_func,
2379                                     struct list_head *sel_opt_inst_list)
2380 {
2381         struct nlattr *option_list;
2382         struct nlmsghdr *nlh;
2383         void *hdr;
2384         struct team_option_inst *opt_inst;
2385         int err;
2386         struct sk_buff *skb = NULL;
2387         bool incomplete;
2388         int i;
2389
2390         opt_inst = list_first_entry(sel_opt_inst_list,
2391                                     struct team_option_inst, tmp_list);
2392
2393 start_again:
2394         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2395         if (err)
2396                 return err;
2397
2398         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2399                           TEAM_CMD_OPTIONS_GET);
2400         if (!hdr) {
2401                 nlmsg_free(skb);
2402                 return -EMSGSIZE;
2403         }
2404
2405         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2406                 goto nla_put_failure;
2407         option_list = nla_nest_start_noflag(skb, TEAM_ATTR_LIST_OPTION);
2408         if (!option_list)
2409                 goto nla_put_failure;
2410
2411         i = 0;
2412         incomplete = false;
2413         list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2414                 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2415                 if (err) {
2416                         if (err == -EMSGSIZE) {
2417                                 if (!i)
2418                                         goto errout;
2419                                 incomplete = true;
2420                                 break;
2421                         }
2422                         goto errout;
2423                 }
2424                 i++;
2425         }
2426
2427         nla_nest_end(skb, option_list);
2428         genlmsg_end(skb, hdr);
2429         if (incomplete)
2430                 goto start_again;
2431
2432 send_done:
2433         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2434         if (!nlh) {
2435                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2436                 if (err)
2437                         return err;
2438                 goto send_done;
2439         }
2440
2441         return send_func(skb, team, portid);
2442
2443 nla_put_failure:
2444         err = -EMSGSIZE;
2445 errout:
2446         nlmsg_free(skb);
2447         return err;
2448 }
2449
2450 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2451 {
2452         struct team *team;
2453         struct team_option_inst *opt_inst;
2454         int err;
2455         LIST_HEAD(sel_opt_inst_list);
2456
2457         team = team_nl_team_get(info);
2458         if (!team)
2459                 return -EINVAL;
2460
2461         list_for_each_entry(opt_inst, &team->option_inst_list, list)
2462                 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2463         err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2464                                        NLM_F_ACK, team_nl_send_unicast,
2465                                        &sel_opt_inst_list);
2466
2467         team_nl_team_put(team);
2468
2469         return err;
2470 }
2471
2472 static int team_nl_send_event_options_get(struct team *team,
2473                                           struct list_head *sel_opt_inst_list);
2474
2475 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2476 {
2477         struct team *team;
2478         int err = 0;
2479         int i;
2480         struct nlattr *nl_option;
2481
2482         rtnl_lock();
2483
2484         team = team_nl_team_get(info);
2485         if (!team) {
2486                 err = -EINVAL;
2487                 goto rtnl_unlock;
2488         }
2489
2490         err = -EINVAL;
2491         if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2492                 err = -EINVAL;
2493                 goto team_put;
2494         }
2495
2496         nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2497                 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2498                 struct nlattr *attr;
2499                 struct nlattr *attr_data;
2500                 LIST_HEAD(opt_inst_list);
2501                 enum team_option_type opt_type;
2502                 int opt_port_ifindex = 0; /* != 0 for per-port options */
2503                 u32 opt_array_index = 0;
2504                 bool opt_is_array = false;
2505                 struct team_option_inst *opt_inst;
2506                 char *opt_name;
2507                 bool opt_found = false;
2508
2509                 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2510                         err = -EINVAL;
2511                         goto team_put;
2512                 }
2513                 err = nla_parse_nested_deprecated(opt_attrs,
2514                                                   TEAM_ATTR_OPTION_MAX,
2515                                                   nl_option,
2516                                                   team_nl_option_policy,
2517                                                   info->extack);
2518                 if (err)
2519                         goto team_put;
2520                 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2521                     !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2522                         err = -EINVAL;
2523                         goto team_put;
2524                 }
2525                 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2526                 case NLA_U32:
2527                         opt_type = TEAM_OPTION_TYPE_U32;
2528                         break;
2529                 case NLA_STRING:
2530                         opt_type = TEAM_OPTION_TYPE_STRING;
2531                         break;
2532                 case NLA_BINARY:
2533                         opt_type = TEAM_OPTION_TYPE_BINARY;
2534                         break;
2535                 case NLA_FLAG:
2536                         opt_type = TEAM_OPTION_TYPE_BOOL;
2537                         break;
2538                 case NLA_S32:
2539                         opt_type = TEAM_OPTION_TYPE_S32;
2540                         break;
2541                 default:
2542                         goto team_put;
2543                 }
2544
2545                 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2546                 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2547                         err = -EINVAL;
2548                         goto team_put;
2549                 }
2550
2551                 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2552                 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2553                 if (attr)
2554                         opt_port_ifindex = nla_get_u32(attr);
2555
2556                 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2557                 if (attr) {
2558                         opt_is_array = true;
2559                         opt_array_index = nla_get_u32(attr);
2560                 }
2561
2562                 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2563                         struct team_option *option = opt_inst->option;
2564                         struct team_gsetter_ctx ctx;
2565                         struct team_option_inst_info *opt_inst_info;
2566                         int tmp_ifindex;
2567
2568                         opt_inst_info = &opt_inst->info;
2569                         tmp_ifindex = opt_inst_info->port ?
2570                                       opt_inst_info->port->dev->ifindex : 0;
2571                         if (option->type != opt_type ||
2572                             strcmp(option->name, opt_name) ||
2573                             tmp_ifindex != opt_port_ifindex ||
2574                             (option->array_size && !opt_is_array) ||
2575                             opt_inst_info->array_index != opt_array_index)
2576                                 continue;
2577                         opt_found = true;
2578                         ctx.info = opt_inst_info;
2579                         switch (opt_type) {
2580                         case TEAM_OPTION_TYPE_U32:
2581                                 ctx.data.u32_val = nla_get_u32(attr_data);
2582                                 break;
2583                         case TEAM_OPTION_TYPE_STRING:
2584                                 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2585                                         err = -EINVAL;
2586                                         goto team_put;
2587                                 }
2588                                 ctx.data.str_val = nla_data(attr_data);
2589                                 break;
2590                         case TEAM_OPTION_TYPE_BINARY:
2591                                 ctx.data.bin_val.len = nla_len(attr_data);
2592                                 ctx.data.bin_val.ptr = nla_data(attr_data);
2593                                 break;
2594                         case TEAM_OPTION_TYPE_BOOL:
2595                                 ctx.data.bool_val = attr_data ? true : false;
2596                                 break;
2597                         case TEAM_OPTION_TYPE_S32:
2598                                 ctx.data.s32_val = nla_get_s32(attr_data);
2599                                 break;
2600                         default:
2601                                 BUG();
2602                         }
2603                         err = team_option_set(team, opt_inst, &ctx);
2604                         if (err)
2605                                 goto team_put;
2606                         opt_inst->changed = true;
2607                         list_add(&opt_inst->tmp_list, &opt_inst_list);
2608                 }
2609                 if (!opt_found) {
2610                         err = -ENOENT;
2611                         goto team_put;
2612                 }
2613
2614                 err = team_nl_send_event_options_get(team, &opt_inst_list);
2615                 if (err)
2616                         break;
2617         }
2618
2619 team_put:
2620         team_nl_team_put(team);
2621 rtnl_unlock:
2622         rtnl_unlock();
2623         return err;
2624 }
2625
2626 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2627                                      struct team_port *port)
2628 {
2629         struct nlattr *port_item;
2630
2631         port_item = nla_nest_start_noflag(skb, TEAM_ATTR_ITEM_PORT);
2632         if (!port_item)
2633                 goto nest_cancel;
2634         if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2635                 goto nest_cancel;
2636         if (port->changed) {
2637                 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2638                         goto nest_cancel;
2639                 port->changed = false;
2640         }
2641         if ((port->removed &&
2642              nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2643             (port->state.linkup &&
2644              nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2645             nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2646             nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2647                 goto nest_cancel;
2648         nla_nest_end(skb, port_item);
2649         return 0;
2650
2651 nest_cancel:
2652         nla_nest_cancel(skb, port_item);
2653         return -EMSGSIZE;
2654 }
2655
2656 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2657                                       int flags, team_nl_send_func_t *send_func,
2658                                       struct team_port *one_port)
2659 {
2660         struct nlattr *port_list;
2661         struct nlmsghdr *nlh;
2662         void *hdr;
2663         struct team_port *port;
2664         int err;
2665         struct sk_buff *skb = NULL;
2666         bool incomplete;
2667         int i;
2668
2669         port = list_first_entry_or_null(&team->port_list,
2670                                         struct team_port, list);
2671
2672 start_again:
2673         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2674         if (err)
2675                 return err;
2676
2677         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2678                           TEAM_CMD_PORT_LIST_GET);
2679         if (!hdr) {
2680                 nlmsg_free(skb);
2681                 return -EMSGSIZE;
2682         }
2683
2684         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2685                 goto nla_put_failure;
2686         port_list = nla_nest_start_noflag(skb, TEAM_ATTR_LIST_PORT);
2687         if (!port_list)
2688                 goto nla_put_failure;
2689
2690         i = 0;
2691         incomplete = false;
2692
2693         /* If one port is selected, called wants to send port list containing
2694          * only this port. Otherwise go through all listed ports and send all
2695          */
2696         if (one_port) {
2697                 err = team_nl_fill_one_port_get(skb, one_port);
2698                 if (err)
2699                         goto errout;
2700         } else if (port) {
2701                 list_for_each_entry_from(port, &team->port_list, list) {
2702                         err = team_nl_fill_one_port_get(skb, port);
2703                         if (err) {
2704                                 if (err == -EMSGSIZE) {
2705                                         if (!i)
2706                                                 goto errout;
2707                                         incomplete = true;
2708                                         break;
2709                                 }
2710                                 goto errout;
2711                         }
2712                         i++;
2713                 }
2714         }
2715
2716         nla_nest_end(skb, port_list);
2717         genlmsg_end(skb, hdr);
2718         if (incomplete)
2719                 goto start_again;
2720
2721 send_done:
2722         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2723         if (!nlh) {
2724                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2725                 if (err)
2726                         return err;
2727                 goto send_done;
2728         }
2729
2730         return send_func(skb, team, portid);
2731
2732 nla_put_failure:
2733         err = -EMSGSIZE;
2734 errout:
2735         nlmsg_free(skb);
2736         return err;
2737 }
2738
2739 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2740                                      struct genl_info *info)
2741 {
2742         struct team *team;
2743         int err;
2744
2745         team = team_nl_team_get(info);
2746         if (!team)
2747                 return -EINVAL;
2748
2749         err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2750                                          NLM_F_ACK, team_nl_send_unicast, NULL);
2751
2752         team_nl_team_put(team);
2753
2754         return err;
2755 }
2756
2757 static const struct genl_ops team_nl_ops[] = {
2758         {
2759                 .cmd = TEAM_CMD_NOOP,
2760                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2761                 .doit = team_nl_cmd_noop,
2762         },
2763         {
2764                 .cmd = TEAM_CMD_OPTIONS_SET,
2765                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2766                 .doit = team_nl_cmd_options_set,
2767                 .flags = GENL_ADMIN_PERM,
2768         },
2769         {
2770                 .cmd = TEAM_CMD_OPTIONS_GET,
2771                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2772                 .doit = team_nl_cmd_options_get,
2773                 .flags = GENL_ADMIN_PERM,
2774         },
2775         {
2776                 .cmd = TEAM_CMD_PORT_LIST_GET,
2777                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2778                 .doit = team_nl_cmd_port_list_get,
2779                 .flags = GENL_ADMIN_PERM,
2780         },
2781 };
2782
2783 static const struct genl_multicast_group team_nl_mcgrps[] = {
2784         { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2785 };
2786
2787 static struct genl_family team_nl_family __ro_after_init = {
2788         .name           = TEAM_GENL_NAME,
2789         .version        = TEAM_GENL_VERSION,
2790         .maxattr        = TEAM_ATTR_MAX,
2791         .policy = team_nl_policy,
2792         .netnsok        = true,
2793         .module         = THIS_MODULE,
2794         .ops            = team_nl_ops,
2795         .n_ops          = ARRAY_SIZE(team_nl_ops),
2796         .mcgrps         = team_nl_mcgrps,
2797         .n_mcgrps       = ARRAY_SIZE(team_nl_mcgrps),
2798 };
2799
2800 static int team_nl_send_multicast(struct sk_buff *skb,
2801                                   struct team *team, u32 portid)
2802 {
2803         return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2804                                        skb, 0, 0, GFP_KERNEL);
2805 }
2806
2807 static int team_nl_send_event_options_get(struct team *team,
2808                                           struct list_head *sel_opt_inst_list)
2809 {
2810         return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2811                                         sel_opt_inst_list);
2812 }
2813
2814 static int team_nl_send_event_port_get(struct team *team,
2815                                        struct team_port *port)
2816 {
2817         return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2818                                           port);
2819 }
2820
2821 static int __init team_nl_init(void)
2822 {
2823         return genl_register_family(&team_nl_family);
2824 }
2825
2826 static void team_nl_fini(void)
2827 {
2828         genl_unregister_family(&team_nl_family);
2829 }
2830
2831
2832 /******************
2833  * Change checkers
2834  ******************/
2835
2836 static void __team_options_change_check(struct team *team)
2837 {
2838         int err;
2839         struct team_option_inst *opt_inst;
2840         LIST_HEAD(sel_opt_inst_list);
2841
2842         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2843                 if (opt_inst->changed)
2844                         list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2845         }
2846         err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2847         if (err && err != -ESRCH)
2848                 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2849                             err);
2850 }
2851
2852 /* rtnl lock is held */
2853
2854 static void __team_port_change_send(struct team_port *port, bool linkup)
2855 {
2856         int err;
2857
2858         port->changed = true;
2859         port->state.linkup = linkup;
2860         team_refresh_port_linkup(port);
2861         if (linkup) {
2862                 struct ethtool_link_ksettings ecmd;
2863
2864                 err = __ethtool_get_link_ksettings(port->dev, &ecmd);
2865                 if (!err) {
2866                         port->state.speed = ecmd.base.speed;
2867                         port->state.duplex = ecmd.base.duplex;
2868                         goto send_event;
2869                 }
2870         }
2871         port->state.speed = 0;
2872         port->state.duplex = 0;
2873
2874 send_event:
2875         err = team_nl_send_event_port_get(port->team, port);
2876         if (err && err != -ESRCH)
2877                 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2878                             port->dev->name, err);
2879
2880 }
2881
2882 static void __team_carrier_check(struct team *team)
2883 {
2884         struct team_port *port;
2885         bool team_linkup;
2886
2887         if (team->user_carrier_enabled)
2888                 return;
2889
2890         team_linkup = false;
2891         list_for_each_entry(port, &team->port_list, list) {
2892                 if (port->linkup) {
2893                         team_linkup = true;
2894                         break;
2895                 }
2896         }
2897
2898         if (team_linkup)
2899                 netif_carrier_on(team->dev);
2900         else
2901                 netif_carrier_off(team->dev);
2902 }
2903
2904 static void __team_port_change_check(struct team_port *port, bool linkup)
2905 {
2906         if (port->state.linkup != linkup)
2907                 __team_port_change_send(port, linkup);
2908         __team_carrier_check(port->team);
2909 }
2910
2911 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2912 {
2913         __team_port_change_send(port, linkup);
2914         __team_carrier_check(port->team);
2915 }
2916
2917 static void __team_port_change_port_removed(struct team_port *port)
2918 {
2919         port->removed = true;
2920         __team_port_change_send(port, false);
2921         __team_carrier_check(port->team);
2922 }
2923
2924 static void team_port_change_check(struct team_port *port, bool linkup)
2925 {
2926         struct team *team = port->team;
2927
2928         mutex_lock(&team->lock);
2929         __team_port_change_check(port, linkup);
2930         mutex_unlock(&team->lock);
2931 }
2932
2933
2934 /************************************
2935  * Net device notifier event handler
2936  ************************************/
2937
2938 static int team_device_event(struct notifier_block *unused,
2939                              unsigned long event, void *ptr)
2940 {
2941         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2942         struct team_port *port;
2943
2944         port = team_port_get_rtnl(dev);
2945         if (!port)
2946                 return NOTIFY_DONE;
2947
2948         switch (event) {
2949         case NETDEV_UP:
2950                 if (netif_oper_up(dev))
2951                         team_port_change_check(port, true);
2952                 break;
2953         case NETDEV_DOWN:
2954                 team_port_change_check(port, false);
2955                 break;
2956         case NETDEV_CHANGE:
2957                 if (netif_running(port->dev))
2958                         team_port_change_check(port,
2959                                                !!netif_oper_up(port->dev));
2960                 break;
2961         case NETDEV_UNREGISTER:
2962                 team_del_slave(port->team->dev, dev);
2963                 break;
2964         case NETDEV_FEAT_CHANGE:
2965                 team_compute_features(port->team);
2966                 break;
2967         case NETDEV_PRECHANGEMTU:
2968                 /* Forbid to change mtu of underlaying device */
2969                 if (!port->team->port_mtu_change_allowed)
2970                         return NOTIFY_BAD;
2971                 break;
2972         case NETDEV_PRE_TYPE_CHANGE:
2973                 /* Forbid to change type of underlaying device */
2974                 return NOTIFY_BAD;
2975         case NETDEV_RESEND_IGMP:
2976                 /* Propagate to master device */
2977                 call_netdevice_notifiers(event, port->team->dev);
2978                 break;
2979         }
2980         return NOTIFY_DONE;
2981 }
2982
2983 static struct notifier_block team_notifier_block __read_mostly = {
2984         .notifier_call = team_device_event,
2985 };
2986
2987
2988 /***********************
2989  * Module init and exit
2990  ***********************/
2991
2992 static int __init team_module_init(void)
2993 {
2994         int err;
2995
2996         register_netdevice_notifier(&team_notifier_block);
2997
2998         err = rtnl_link_register(&team_link_ops);
2999         if (err)
3000                 goto err_rtnl_reg;
3001
3002         err = team_nl_init();
3003         if (err)
3004                 goto err_nl_init;
3005
3006         return 0;
3007
3008 err_nl_init:
3009         rtnl_link_unregister(&team_link_ops);
3010
3011 err_rtnl_reg:
3012         unregister_netdevice_notifier(&team_notifier_block);
3013
3014         return err;
3015 }
3016
3017 static void __exit team_module_exit(void)
3018 {
3019         team_nl_fini();
3020         rtnl_link_unregister(&team_link_ops);
3021         unregister_netdevice_notifier(&team_notifier_block);
3022 }
3023
3024 module_init(team_module_init);
3025 module_exit(team_module_exit);
3026
3027 MODULE_LICENSE("GPL v2");
3028 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
3029 MODULE_DESCRIPTION("Ethernet team device driver");
3030 MODULE_ALIAS_RTNL_LINK(DRV_NAME);