drivers/net/team/team.c

   1 /*
   2  * drivers/net/team/team.c - Network team device driver
   3  * Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/types.h>
  13 #include <linux/module.h>
  14 #include <linux/init.h>
  15 #include <linux/slab.h>
  16 #include <linux/rcupdate.h>
  17 #include <linux/errno.h>
  18 #include <linux/ctype.h>
  19 #include <linux/notifier.h>
  20 #include <linux/netdevice.h>
  21 #include <linux/netpoll.h>
  22 #include <linux/if_vlan.h>
  23 #include <linux/if_arp.h>
  24 #include <linux/socket.h>
  25 #include <linux/etherdevice.h>
  26 #include <linux/rtnetlink.h>
  27 #include <net/rtnetlink.h>
  28 #include <net/genetlink.h>
  29 #include <net/netlink.h>
  30 #include <net/sch_generic.h>
  31 #include <net/switchdev.h>
  32 #include <generated/utsrelease.h>
  33 #include <linux/if_team.h>
  34
  35 #define DRV_NAME "team"
  36
  37
  38 /**********
  39  * Helpers
  40  **********/
  41
  42 #define team_port_exists(dev) (dev->priv_flags & IFF_TEAM_PORT)
  43
  44 static struct team_port *team_port_get_rcu(const struct net_device *dev)
  45 {
  46         return rcu_dereference(dev->rx_handler_data);
  47 }
  48
  49 static struct team_port *team_port_get_rtnl(const struct net_device *dev)
  50 {
  51         struct team_port *port = rtnl_dereference(dev->rx_handler_data);
  52
  53         return team_port_exists(dev) ? port : NULL;
  54 }
  55
  56 /*
  57  * Since the ability to change device address for open port device is tested in
  58  * team_port_add, this function can be called without control of return value
  59  */
  60 static int __set_port_dev_addr(struct net_device *port_dev,
  61                                const unsigned char *dev_addr)
  62 {
  63         struct sockaddr_storage addr;
  64
  65         memcpy(addr.__data, dev_addr, port_dev->addr_len);
  66         addr.ss_family = port_dev->type;
  67         return dev_set_mac_address(port_dev, (struct sockaddr *)&addr);
  68 }
  69
  70 static int team_port_set_orig_dev_addr(struct team_port *port)
  71 {
  72         return __set_port_dev_addr(port->dev, port->orig.dev_addr);
  73 }
  74
  75 static int team_port_set_team_dev_addr(struct team *team,
  76                                        struct team_port *port)
  77 {
  78         return __set_port_dev_addr(port->dev, team->dev->dev_addr);
  79 }
  80
  81 int team_modeop_port_enter(struct team *team, struct team_port *port)
  82 {
  83         return team_port_set_team_dev_addr(team, port);
  84 }
  85 EXPORT_SYMBOL(team_modeop_port_enter);
  86
  87 void team_modeop_port_change_dev_addr(struct team *team,
  88                                       struct team_port *port)
  89 {
  90         team_port_set_team_dev_addr(team, port);
  91 }
  92 EXPORT_SYMBOL(team_modeop_port_change_dev_addr);
  93
  94 static void team_lower_state_changed(struct team_port *port)
  95 {
  96         struct netdev_lag_lower_state_info info;
  97
  98         info.link_up = port->linkup;
  99         info.tx_enabled = team_port_enabled(port);
 100         netdev_lower_state_changed(port->dev, &info);
 101 }
 102
 103 static void team_refresh_port_linkup(struct team_port *port)
 104 {
 105         bool new_linkup = port->user.linkup_enabled ? port->user.linkup :
 106                                                       port->state.linkup;
 107
 108         if (port->linkup != new_linkup) {
 109                 port->linkup = new_linkup;
 110                 team_lower_state_changed(port);
 111         }
 112 }
 113
 114
 115 /*******************
 116  * Options handling
 117  *******************/
 118
 119 struct team_option_inst { /* One for each option instance */
 120         struct list_head list;
 121         struct list_head tmp_list;
 122         struct team_option *option;
 123         struct team_option_inst_info info;
 124         bool changed;
 125         bool removed;
 126 };
 127
 128 static struct team_option *__team_find_option(struct team *team,
 129                                               const char *opt_name)
 130 {
 131         struct team_option *option;
 132
 133         list_for_each_entry(option, &team->option_list, list) {
 134                 if (strcmp(option->name, opt_name) == 0)
 135                         return option;
 136         }
 137         return NULL;
 138 }
 139
 140 static void __team_option_inst_del(struct team_option_inst *opt_inst)
 141 {
 142         list_del(&opt_inst->list);
 143         kfree(opt_inst);
 144 }
 145
 146 static void __team_option_inst_del_option(struct team *team,
 147                                           struct team_option *option)
 148 {
 149         struct team_option_inst *opt_inst, *tmp;
 150
 151         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 152                 if (opt_inst->option == option)
 153                         __team_option_inst_del(opt_inst);
 154         }
 155 }
 156
 157 static int __team_option_inst_add(struct team *team, struct team_option *option,
 158                                   struct team_port *port)
 159 {
 160         struct team_option_inst *opt_inst;
 161         unsigned int array_size;
 162         unsigned int i;
 163         int err;
 164
 165         array_size = option->array_size;
 166         if (!array_size)
 167                 array_size = 1; /* No array but still need one instance */
 168
 169         for (i = 0; i < array_size; i++) {
 170                 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL);
 171                 if (!opt_inst)
 172                         return -ENOMEM;
 173                 opt_inst->option = option;
 174                 opt_inst->info.port = port;
 175                 opt_inst->info.array_index = i;
 176                 opt_inst->changed = true;
 177                 opt_inst->removed = false;
 178                 list_add_tail(&opt_inst->list, &team->option_inst_list);
 179                 if (option->init) {
 180                         err = option->init(team, &opt_inst->info);
 181                         if (err)
 182                                 return err;
 183                 }
 184
 185         }
 186         return 0;
 187 }
 188
 189 static int __team_option_inst_add_option(struct team *team,
 190                                          struct team_option *option)
 191 {
 192         int err;
 193
 194         if (!option->per_port) {
 195                 err = __team_option_inst_add(team, option, NULL);
 196                 if (err)
 197                         goto inst_del_option;
 198         }
 199         return 0;
 200
 201 inst_del_option:
 202         __team_option_inst_del_option(team, option);
 203         return err;
 204 }
 205
 206 static void __team_option_inst_mark_removed_option(struct team *team,
 207                                                    struct team_option *option)
 208 {
 209         struct team_option_inst *opt_inst;
 210
 211         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 212                 if (opt_inst->option == option) {
 213                         opt_inst->changed = true;
 214                         opt_inst->removed = true;
 215                 }
 216         }
 217 }
 218
 219 static void __team_option_inst_del_port(struct team *team,
 220                                         struct team_port *port)
 221 {
 222         struct team_option_inst *opt_inst, *tmp;
 223
 224         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 225                 if (opt_inst->option->per_port &&
 226                     opt_inst->info.port == port)
 227                         __team_option_inst_del(opt_inst);
 228         }
 229 }
 230
 231 static int __team_option_inst_add_port(struct team *team,
 232                                        struct team_port *port)
 233 {
 234         struct team_option *option;
 235         int err;
 236
 237         list_for_each_entry(option, &team->option_list, list) {
 238                 if (!option->per_port)
 239                         continue;
 240                 err = __team_option_inst_add(team, option, port);
 241                 if (err)
 242                         goto inst_del_port;
 243         }
 244         return 0;
 245
 246 inst_del_port:
 247         __team_option_inst_del_port(team, port);
 248         return err;
 249 }
 250
 251 static void __team_option_inst_mark_removed_port(struct team *team,
 252                                                  struct team_port *port)
 253 {
 254         struct team_option_inst *opt_inst;
 255
 256         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 257                 if (opt_inst->info.port == port) {
 258                         opt_inst->changed = true;
 259                         opt_inst->removed = true;
 260                 }
 261         }
 262 }
 263
 264 static int __team_options_register(struct team *team,
 265                                    const struct team_option *option,
 266                                    size_t option_count)
 267 {
 268         int i;
 269         struct team_option **dst_opts;
 270         int err;
 271
 272         dst_opts = kzalloc(sizeof(struct team_option *) * option_count,
 273                            GFP_KERNEL);
 274         if (!dst_opts)
 275                 return -ENOMEM;
 276         for (i = 0; i < option_count; i++, option++) {
 277                 if (__team_find_option(team, option->name)) {
 278                         err = -EEXIST;
 279                         goto alloc_rollback;
 280                 }
 281                 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
 282                 if (!dst_opts[i]) {
 283                         err = -ENOMEM;
 284                         goto alloc_rollback;
 285                 }
 286         }
 287
 288         for (i = 0; i < option_count; i++) {
 289                 err = __team_option_inst_add_option(team, dst_opts[i]);
 290                 if (err)
 291                         goto inst_rollback;
 292                 list_add_tail(&dst_opts[i]->list, &team->option_list);
 293         }
 294
 295         kfree(dst_opts);
 296         return 0;
 297
 298 inst_rollback:
 299         for (i--; i >= 0; i--)
 300                 __team_option_inst_del_option(team, dst_opts[i]);
 301
 302         i = option_count - 1;
 303 alloc_rollback:
 304         for (i--; i >= 0; i--)
 305                 kfree(dst_opts[i]);
 306
 307         kfree(dst_opts);
 308         return err;
 309 }
 310
 311 static void __team_options_mark_removed(struct team *team,
 312                                         const struct team_option *option,
 313                                         size_t option_count)
 314 {
 315         int i;
 316
 317         for (i = 0; i < option_count; i++, option++) {
 318                 struct team_option *del_opt;
 319
 320                 del_opt = __team_find_option(team, option->name);
 321                 if (del_opt)
 322                         __team_option_inst_mark_removed_option(team, del_opt);
 323         }
 324 }
 325
 326 static void __team_options_unregister(struct team *team,
 327                                       const struct team_option *option,
 328                                       size_t option_count)
 329 {
 330         int i;
 331
 332         for (i = 0; i < option_count; i++, option++) {
 333                 struct team_option *del_opt;
 334
 335                 del_opt = __team_find_option(team, option->name);
 336                 if (del_opt) {
 337                         __team_option_inst_del_option(team, del_opt);
 338                         list_del(&del_opt->list);
 339                         kfree(del_opt);
 340                 }
 341         }
 342 }
 343
 344 static void __team_options_change_check(struct team *team);
 345
 346 int team_options_register(struct team *team,
 347                           const struct team_option *option,
 348                           size_t option_count)
 349 {
 350         int err;
 351
 352         err = __team_options_register(team, option, option_count);
 353         if (err)
 354                 return err;
 355         __team_options_change_check(team);
 356         return 0;
 357 }
 358 EXPORT_SYMBOL(team_options_register);
 359
 360 void team_options_unregister(struct team *team,
 361                              const struct team_option *option,
 362                              size_t option_count)
 363 {
 364         __team_options_mark_removed(team, option, option_count);
 365         __team_options_change_check(team);
 366         __team_options_unregister(team, option, option_count);
 367 }
 368 EXPORT_SYMBOL(team_options_unregister);
 369
 370 static int team_option_get(struct team *team,
 371                            struct team_option_inst *opt_inst,
 372                            struct team_gsetter_ctx *ctx)
 373 {
 374         if (!opt_inst->option->getter)
 375                 return -EOPNOTSUPP;
 376         return opt_inst->option->getter(team, ctx);
 377 }
 378
 379 static int team_option_set(struct team *team,
 380                            struct team_option_inst *opt_inst,
 381                            struct team_gsetter_ctx *ctx)
 382 {
 383         if (!opt_inst->option->setter)
 384                 return -EOPNOTSUPP;
 385         return opt_inst->option->setter(team, ctx);
 386 }
 387
 388 void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info)
 389 {
 390         struct team_option_inst *opt_inst;
 391
 392         opt_inst = container_of(opt_inst_info, struct team_option_inst, info);
 393         opt_inst->changed = true;
 394 }
 395 EXPORT_SYMBOL(team_option_inst_set_change);
 396
 397 void team_options_change_check(struct team *team)
 398 {
 399         __team_options_change_check(team);
 400 }
 401 EXPORT_SYMBOL(team_options_change_check);
 402
 403
 404 /****************
 405  * Mode handling
 406  ****************/
 407
 408 static LIST_HEAD(mode_list);
 409 static DEFINE_SPINLOCK(mode_list_lock);
 410
 411 struct team_mode_item {
 412         struct list_head list;
 413         const struct team_mode *mode;
 414 };
 415
 416 static struct team_mode_item *__find_mode(const char *kind)
 417 {
 418         struct team_mode_item *mitem;
 419
 420         list_for_each_entry(mitem, &mode_list, list) {
 421                 if (strcmp(mitem->mode->kind, kind) == 0)
 422                         return mitem;
 423         }
 424         return NULL;
 425 }
 426
 427 static bool is_good_mode_name(const char *name)
 428 {
 429         while (*name != '\0') {
 430                 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
 431                         return false;
 432                 name++;
 433         }
 434         return true;
 435 }
 436
 437 int team_mode_register(const struct team_mode *mode)
 438 {
 439         int err = 0;
 440         struct team_mode_item *mitem;
 441
 442         if (!is_good_mode_name(mode->kind) ||
 443             mode->priv_size > TEAM_MODE_PRIV_SIZE)
 444                 return -EINVAL;
 445
 446         mitem = kmalloc(sizeof(*mitem), GFP_KERNEL);
 447         if (!mitem)
 448                 return -ENOMEM;
 449
 450         spin_lock(&mode_list_lock);
 451         if (__find_mode(mode->kind)) {
 452                 err = -EEXIST;
 453                 kfree(mitem);
 454                 goto unlock;
 455         }
 456         mitem->mode = mode;
 457         list_add_tail(&mitem->list, &mode_list);
 458 unlock:
 459         spin_unlock(&mode_list_lock);
 460         return err;
 461 }
 462 EXPORT_SYMBOL(team_mode_register);
 463
 464 void team_mode_unregister(const struct team_mode *mode)
 465 {
 466         struct team_mode_item *mitem;
 467
 468         spin_lock(&mode_list_lock);
 469         mitem = __find_mode(mode->kind);
 470         if (mitem) {
 471                 list_del_init(&mitem->list);
 472                 kfree(mitem);
 473         }
 474         spin_unlock(&mode_list_lock);
 475 }
 476 EXPORT_SYMBOL(team_mode_unregister);
 477
 478 static const struct team_mode *team_mode_get(const char *kind)
 479 {
 480         struct team_mode_item *mitem;
 481         const struct team_mode *mode = NULL;
 482
 483         spin_lock(&mode_list_lock);
 484         mitem = __find_mode(kind);
 485         if (!mitem) {
 486                 spin_unlock(&mode_list_lock);
 487                 request_module("team-mode-%s", kind);
 488                 spin_lock(&mode_list_lock);
 489                 mitem = __find_mode(kind);
 490         }
 491         if (mitem) {
 492                 mode = mitem->mode;
 493                 if (!try_module_get(mode->owner))
 494                         mode = NULL;
 495         }
 496
 497         spin_unlock(&mode_list_lock);
 498         return mode;
 499 }
 500
 501 static void team_mode_put(const struct team_mode *mode)
 502 {
 503         module_put(mode->owner);
 504 }
 505
 506 static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
 507 {
 508         dev_kfree_skb_any(skb);
 509         return false;
 510 }
 511
 512 static rx_handler_result_t team_dummy_receive(struct team *team,
 513                                               struct team_port *port,
 514                                               struct sk_buff *skb)
 515 {
 516         return RX_HANDLER_ANOTHER;
 517 }
 518
 519 static const struct team_mode __team_no_mode = {
 520         .kind           = "*NOMODE*",
 521 };
 522
 523 static bool team_is_mode_set(struct team *team)
 524 {
 525         return team->mode != &__team_no_mode;
 526 }
 527
 528 static void team_set_no_mode(struct team *team)
 529 {
 530         team->user_carrier_enabled = false;
 531         team->mode = &__team_no_mode;
 532 }
 533
 534 static void team_adjust_ops(struct team *team)
 535 {
 536         /*
 537          * To avoid checks in rx/tx skb paths, ensure here that non-null and
 538          * correct ops are always set.
 539          */
 540
 541         if (!team->en_port_count || !team_is_mode_set(team) ||
 542             !team->mode->ops->transmit)
 543                 team->ops.transmit = team_dummy_transmit;
 544         else
 545                 team->ops.transmit = team->mode->ops->transmit;
 546
 547         if (!team->en_port_count || !team_is_mode_set(team) ||
 548             !team->mode->ops->receive)
 549                 team->ops.receive = team_dummy_receive;
 550         else
 551                 team->ops.receive = team->mode->ops->receive;
 552 }
 553
 554 /*
 555  * We can benefit from the fact that it's ensured no port is present
 556  * at the time of mode change. Therefore no packets are in fly so there's no
 557  * need to set mode operations in any special way.
 558  */
 559 static int __team_change_mode(struct team *team,
 560                               const struct team_mode *new_mode)
 561 {
 562         /* Check if mode was previously set and do cleanup if so */
 563         if (team_is_mode_set(team)) {
 564                 void (*exit_op)(struct team *team) = team->ops.exit;
 565
 566                 /* Clear ops area so no callback is called any longer */
 567                 memset(&team->ops, 0, sizeof(struct team_mode_ops));
 568                 team_adjust_ops(team);
 569
 570                 if (exit_op)
 571                         exit_op(team);
 572                 team_mode_put(team->mode);
 573                 team_set_no_mode(team);
 574                 /* zero private data area */
 575                 memset(&team->mode_priv, 0,
 576                        sizeof(struct team) - offsetof(struct team, mode_priv));
 577         }
 578
 579         if (!new_mode)
 580                 return 0;
 581
 582         if (new_mode->ops->init) {
 583                 int err;
 584
 585                 err = new_mode->ops->init(team);
 586                 if (err)
 587                         return err;
 588         }
 589
 590         team->mode = new_mode;
 591         memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
 592         team_adjust_ops(team);
 593
 594         return 0;
 595 }
 596
 597 static int team_change_mode(struct team *team, const char *kind)
 598 {
 599         const struct team_mode *new_mode;
 600         struct net_device *dev = team->dev;
 601         int err;
 602
 603         if (!list_empty(&team->port_list)) {
 604                 netdev_err(dev, "No ports can be present during mode change\n");
 605                 return -EBUSY;
 606         }
 607
 608         if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) {
 609                 netdev_err(dev, "Unable to change to the same mode the team is in\n");
 610                 return -EINVAL;
 611         }
 612
 613         new_mode = team_mode_get(kind);
 614         if (!new_mode) {
 615                 netdev_err(dev, "Mode \"%s\" not found\n", kind);
 616                 return -EINVAL;
 617         }
 618
 619         err = __team_change_mode(team, new_mode);
 620         if (err) {
 621                 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
 622                 team_mode_put(new_mode);
 623                 return err;
 624         }
 625
 626         netdev_info(dev, "Mode changed to \"%s\"\n", kind);
 627         return 0;
 628 }
 629
 630
 631 /*********************
 632  * Peers notification
 633  *********************/
 634
 635 static void team_notify_peers_work(struct work_struct *work)
 636 {
 637         struct team *team;
 638         int val;
 639
 640         team = container_of(work, struct team, notify_peers.dw.work);
 641
 642         if (!rtnl_trylock()) {
 643                 schedule_delayed_work(&team->notify_peers.dw, 0);
 644                 return;
 645         }
 646         val = atomic_dec_if_positive(&team->notify_peers.count_pending);
 647         if (val < 0) {
 648                 rtnl_unlock();
 649                 return;
 650         }
 651         call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, team->dev);
 652         rtnl_unlock();
 653         if (val)
 654                 schedule_delayed_work(&team->notify_peers.dw,
 655                                       msecs_to_jiffies(team->notify_peers.interval));
 656 }
 657
 658 static void team_notify_peers(struct team *team)
 659 {
 660         if (!team->notify_peers.count || !netif_running(team->dev))
 661                 return;
 662         atomic_add(team->notify_peers.count, &team->notify_peers.count_pending);
 663         schedule_delayed_work(&team->notify_peers.dw, 0);
 664 }
 665
 666 static void team_notify_peers_init(struct team *team)
 667 {
 668         INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work);
 669 }
 670
 671 static void team_notify_peers_fini(struct team *team)
 672 {
 673         cancel_delayed_work_sync(&team->notify_peers.dw);
 674 }
 675
 676
 677 /*******************************
 678  * Send multicast group rejoins
 679  *******************************/
 680
 681 static void team_mcast_rejoin_work(struct work_struct *work)
 682 {
 683         struct team *team;
 684         int val;
 685
 686         team = container_of(work, struct team, mcast_rejoin.dw.work);
 687
 688         if (!rtnl_trylock()) {
 689                 schedule_delayed_work(&team->mcast_rejoin.dw, 0);
 690                 return;
 691         }
 692         val = atomic_dec_if_positive(&team->mcast_rejoin.count_pending);
 693         if (val < 0) {
 694                 rtnl_unlock();
 695                 return;
 696         }
 697         call_netdevice_notifiers(NETDEV_RESEND_IGMP, team->dev);
 698         rtnl_unlock();
 699         if (val)
 700                 schedule_delayed_work(&team->mcast_rejoin.dw,
 701                                       msecs_to_jiffies(team->mcast_rejoin.interval));
 702 }
 703
 704 static void team_mcast_rejoin(struct team *team)
 705 {
 706         if (!team->mcast_rejoin.count || !netif_running(team->dev))
 707                 return;
 708         atomic_add(team->mcast_rejoin.count, &team->mcast_rejoin.count_pending);
 709         schedule_delayed_work(&team->mcast_rejoin.dw, 0);
 710 }
 711
 712 static void team_mcast_rejoin_init(struct team *team)
 713 {
 714         INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work);
 715 }
 716
 717 static void team_mcast_rejoin_fini(struct team *team)
 718 {
 719         cancel_delayed_work_sync(&team->mcast_rejoin.dw);
 720 }
 721
 722
 723 /************************
 724  * Rx path frame handler
 725  ************************/
 726
 727 /* note: already called with rcu_read_lock */
 728 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
 729 {
 730         struct sk_buff *skb = *pskb;
 731         struct team_port *port;
 732         struct team *team;
 733         rx_handler_result_t res;
 734
 735         skb = skb_share_check(skb, GFP_ATOMIC);
 736         if (!skb)
 737                 return RX_HANDLER_CONSUMED;
 738
 739         *pskb = skb;
 740
 741         port = team_port_get_rcu(skb->dev);
 742         team = port->team;
 743         if (!team_port_enabled(port)) {
 744                 /* allow exact match delivery for disabled ports */
 745                 res = RX_HANDLER_EXACT;
 746         } else {
 747                 res = team->ops.receive(team, port, skb);
 748         }
 749         if (res == RX_HANDLER_ANOTHER) {
 750                 struct team_pcpu_stats *pcpu_stats;
 751
 752                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
 753                 u64_stats_update_begin(&pcpu_stats->syncp);
 754                 pcpu_stats->rx_packets++;
 755                 pcpu_stats->rx_bytes += skb->len;
 756                 if (skb->pkt_type == PACKET_MULTICAST)
 757                         pcpu_stats->rx_multicast++;
 758                 u64_stats_update_end(&pcpu_stats->syncp);
 759
 760                 skb->dev = team->dev;
 761         } else if (res == RX_HANDLER_EXACT) {
 762                 this_cpu_inc(team->pcpu_stats->rx_nohandler);
 763         } else {
 764                 this_cpu_inc(team->pcpu_stats->rx_dropped);
 765         }
 766
 767         return res;
 768 }
 769
 770
 771 /*************************************
 772  * Multiqueue Tx port select override
 773  *************************************/
 774
 775 static int team_queue_override_init(struct team *team)
 776 {
 777         struct list_head *listarr;
 778         unsigned int queue_cnt = team->dev->num_tx_queues - 1;
 779         unsigned int i;
 780
 781         if (!queue_cnt)
 782                 return 0;
 783         listarr = kmalloc(sizeof(struct list_head) * queue_cnt, GFP_KERNEL);
 784         if (!listarr)
 785                 return -ENOMEM;
 786         team->qom_lists = listarr;
 787         for (i = 0; i < queue_cnt; i++)
 788                 INIT_LIST_HEAD(listarr++);
 789         return 0;
 790 }
 791
 792 static void team_queue_override_fini(struct team *team)
 793 {
 794         kfree(team->qom_lists);
 795 }
 796
 797 static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
 798 {
 799         return &team->qom_lists[queue_id - 1];
 800 }
 801
 802 /*
 803  * note: already called with rcu_read_lock
 804  */
 805 static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
 806 {
 807         struct list_head *qom_list;
 808         struct team_port *port;
 809
 810         if (!team->queue_override_enabled || !skb->queue_mapping)
 811                 return false;
 812         qom_list = __team_get_qom_list(team, skb->queue_mapping);
 813         list_for_each_entry_rcu(port, qom_list, qom_list) {
 814                 if (!team_dev_queue_xmit(team, port, skb))
 815                         return true;
 816         }
 817         return false;
 818 }
 819
 820 static void __team_queue_override_port_del(struct team *team,
 821                                            struct team_port *port)
 822 {
 823         if (!port->queue_id)
 824                 return;
 825         list_del_rcu(&port->qom_list);
 826 }
 827
 828 static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
 829                                                       struct team_port *cur)
 830 {
 831         if (port->priority < cur->priority)
 832                 return true;
 833         if (port->priority > cur->priority)
 834                 return false;
 835         if (port->index < cur->index)
 836                 return true;
 837         return false;
 838 }
 839
 840 static void __team_queue_override_port_add(struct team *team,
 841                                            struct team_port *port)
 842 {
 843         struct team_port *cur;
 844         struct list_head *qom_list;
 845         struct list_head *node;
 846
 847         if (!port->queue_id)
 848                 return;
 849         qom_list = __team_get_qom_list(team, port->queue_id);
 850         node = qom_list;
 851         list_for_each_entry(cur, qom_list, qom_list) {
 852                 if (team_queue_override_port_has_gt_prio_than(port, cur))
 853                         break;
 854                 node = &cur->qom_list;
 855         }
 856         list_add_tail_rcu(&port->qom_list, node);
 857 }
 858
 859 static void __team_queue_override_enabled_check(struct team *team)
 860 {
 861         struct team_port *port;
 862         bool enabled = false;
 863
 864         list_for_each_entry(port, &team->port_list, list) {
 865                 if (port->queue_id) {
 866                         enabled = true;
 867                         break;
 868                 }
 869         }
 870         if (enabled == team->queue_override_enabled)
 871                 return;
 872         netdev_dbg(team->dev, "%s queue override\n",
 873                    enabled ? "Enabling" : "Disabling");
 874         team->queue_override_enabled = enabled;
 875 }
 876
 877 static void team_queue_override_port_prio_changed(struct team *team,
 878                                                   struct team_port *port)
 879 {
 880         if (!port->queue_id || team_port_enabled(port))
 881                 return;
 882         __team_queue_override_port_del(team, port);
 883         __team_queue_override_port_add(team, port);
 884         __team_queue_override_enabled_check(team);
 885 }
 886
 887 static void team_queue_override_port_change_queue_id(struct team *team,
 888                                                      struct team_port *port,
 889                                                      u16 new_queue_id)
 890 {
 891         if (team_port_enabled(port)) {
 892                 __team_queue_override_port_del(team, port);
 893                 port->queue_id = new_queue_id;
 894                 __team_queue_override_port_add(team, port);
 895                 __team_queue_override_enabled_check(team);
 896         } else {
 897                 port->queue_id = new_queue_id;
 898         }
 899 }
 900
 901 static void team_queue_override_port_add(struct team *team,
 902                                          struct team_port *port)
 903 {
 904         __team_queue_override_port_add(team, port);
 905         __team_queue_override_enabled_check(team);
 906 }
 907
 908 static void team_queue_override_port_del(struct team *team,
 909                                          struct team_port *port)
 910 {
 911         __team_queue_override_port_del(team, port);
 912         __team_queue_override_enabled_check(team);
 913 }
 914
 915
 916 /****************
 917  * Port handling
 918  ****************/
 919
 920 static bool team_port_find(const struct team *team,
 921                            const struct team_port *port)
 922 {
 923         struct team_port *cur;
 924
 925         list_for_each_entry(cur, &team->port_list, list)
 926                 if (cur == port)
 927                         return true;
 928         return false;
 929 }
 930
 931 /*
 932  * Enable/disable port by adding to enabled port hashlist and setting
 933  * port->index (Might be racy so reader could see incorrect ifindex when
 934  * processing a flying packet, but that is not a problem). Write guarded
 935  * by team->lock.
 936  */
 937 static void team_port_enable(struct team *team,
 938                              struct team_port *port)
 939 {
 940         if (team_port_enabled(port))
 941                 return;
 942         port->index = team->en_port_count++;
 943         hlist_add_head_rcu(&port->hlist,
 944                            team_port_index_hash(team, port->index));
 945         team_adjust_ops(team);
 946         team_queue_override_port_add(team, port);
 947         if (team->ops.port_enabled)
 948                 team->ops.port_enabled(team, port);
 949         team_notify_peers(team);
 950         team_mcast_rejoin(team);
 951         team_lower_state_changed(port);
 952 }
 953
 954 static void __reconstruct_port_hlist(struct team *team, int rm_index)
 955 {
 956         int i;
 957         struct team_port *port;
 958
 959         for (i = rm_index + 1; i < team->en_port_count; i++) {
 960                 port = team_get_port_by_index(team, i);
 961                 hlist_del_rcu(&port->hlist);
 962                 port->index--;
 963                 hlist_add_head_rcu(&port->hlist,
 964                                    team_port_index_hash(team, port->index));
 965         }
 966 }
 967
 968 static void team_port_disable(struct team *team,
 969                               struct team_port *port)
 970 {
 971         if (!team_port_enabled(port))
 972                 return;
 973         if (team->ops.port_disabled)
 974                 team->ops.port_disabled(team, port);
 975         hlist_del_rcu(&port->hlist);
 976         __reconstruct_port_hlist(team, port->index);
 977         port->index = -1;
 978         team->en_port_count--;
 979         team_queue_override_port_del(team, port);
 980         team_adjust_ops(team);
 981         team_notify_peers(team);
 982         team_mcast_rejoin(team);
 983         team_lower_state_changed(port);
 984 }
 985
 986 #define TEAM_VLAN_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
 987                             NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
 988                             NETIF_F_HIGHDMA | NETIF_F_LRO)
 989
 990 #define TEAM_ENC_FEATURES       (NETIF_F_HW_CSUM | NETIF_F_SG | \
 991                                  NETIF_F_RXCSUM | NETIF_F_ALL_TSO)
 992
 993 static void __team_compute_features(struct team *team)
 994 {
 995         struct team_port *port;
 996         u32 vlan_features = TEAM_VLAN_FEATURES & NETIF_F_ALL_FOR_ALL;
 997         netdev_features_t enc_features  = TEAM_ENC_FEATURES;
 998         unsigned short max_hard_header_len = ETH_HLEN;
 999         unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE |
1000                                         IFF_XMIT_DST_RELEASE_PERM;
1001
1002         list_for_each_entry(port, &team->port_list, list) {
1003                 vlan_features = netdev_increment_features(vlan_features,
1004                                         port->dev->vlan_features,
1005                                         TEAM_VLAN_FEATURES);
1006                 enc_features =
1007                         netdev_increment_features(enc_features,
1008                                                   port->dev->hw_enc_features,
1009                                                   TEAM_ENC_FEATURES);
1010
1011
1012                 dst_release_flag &= port->dev->priv_flags;
1013                 if (port->dev->hard_header_len > max_hard_header_len)
1014                         max_hard_header_len = port->dev->hard_header_len;
1015         }
1016
1017         team->dev->vlan_features = vlan_features;
1018         team->dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL;
1019         team->dev->hard_header_len = max_hard_header_len;
1020
1021         team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
1022         if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
1023                 team->dev->priv_flags |= IFF_XMIT_DST_RELEASE;
1024 }
1025
1026 static void team_compute_features(struct team *team)
1027 {
1028         mutex_lock(&team->lock);
1029         __team_compute_features(team);
1030         mutex_unlock(&team->lock);
1031         netdev_change_features(team->dev);
1032 }
1033
1034 static int team_port_enter(struct team *team, struct team_port *port)
1035 {
1036         int err = 0;
1037
1038         dev_hold(team->dev);
1039         if (team->ops.port_enter) {
1040                 err = team->ops.port_enter(team, port);
1041                 if (err) {
1042                         netdev_err(team->dev, "Device %s failed to enter team mode\n",
1043                                    port->dev->name);
1044                         goto err_port_enter;
1045                 }
1046         }
1047
1048         return 0;
1049
1050 err_port_enter:
1051         dev_put(team->dev);
1052
1053         return err;
1054 }
1055
1056 static void team_port_leave(struct team *team, struct team_port *port)
1057 {
1058         if (team->ops.port_leave)
1059                 team->ops.port_leave(team, port);
1060         dev_put(team->dev);
1061 }
1062
1063 #ifdef CONFIG_NET_POLL_CONTROLLER
1064 static int team_port_enable_netpoll(struct team *team, struct team_port *port)
1065 {
1066         struct netpoll *np;
1067         int err;
1068
1069         if (!team->dev->npinfo)
1070                 return 0;
1071
1072         np = kzalloc(sizeof(*np), GFP_KERNEL);
1073         if (!np)
1074                 return -ENOMEM;
1075
1076         err = __netpoll_setup(np, port->dev);
1077         if (err) {
1078                 kfree(np);
1079                 return err;
1080         }
1081         port->np = np;
1082         return err;
1083 }
1084
1085 static void team_port_disable_netpoll(struct team_port *port)
1086 {
1087         struct netpoll *np = port->np;
1088
1089         if (!np)
1090                 return;
1091         port->np = NULL;
1092
1093         /* Wait for transmitting packets to finish before freeing. */
1094         synchronize_rcu_bh();
1095         __netpoll_cleanup(np);
1096         kfree(np);
1097 }
1098 #else
1099 static int team_port_enable_netpoll(struct team *team, struct team_port *port)
1100 {
1101         return 0;
1102 }
1103 static void team_port_disable_netpoll(struct team_port *port)
1104 {
1105 }
1106 #endif
1107
1108 static int team_upper_dev_link(struct team *team, struct team_port *port,
1109                                struct netlink_ext_ack *extack)
1110 {
1111         struct netdev_lag_upper_info lag_upper_info;
1112         int err;
1113
1114         lag_upper_info.tx_type = team->mode->lag_tx_type;
1115         err = netdev_master_upper_dev_link(port->dev, team->dev, NULL,
1116                                            &lag_upper_info, extack);
1117         if (err)
1118                 return err;
1119         port->dev->priv_flags |= IFF_TEAM_PORT;
1120         return 0;
1121 }
1122
1123 static void team_upper_dev_unlink(struct team *team, struct team_port *port)
1124 {
1125         netdev_upper_dev_unlink(port->dev, team->dev);
1126         port->dev->priv_flags &= ~IFF_TEAM_PORT;
1127 }
1128
1129 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1130 static int team_dev_type_check_change(struct net_device *dev,
1131                                       struct net_device *port_dev);
1132
1133 static int team_port_add(struct team *team, struct net_device *port_dev,
1134                          struct netlink_ext_ack *extack)
1135 {
1136         struct net_device *dev = team->dev;
1137         struct team_port *port;
1138         char *portname = port_dev->name;
1139         int err;
1140
1141         if (port_dev->flags & IFF_LOOPBACK) {
1142                 NL_SET_ERR_MSG(extack, "Loopback device can't be added as a team port");
1143                 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1144                            portname);
1145                 return -EINVAL;
1146         }
1147
1148         if (team_port_exists(port_dev)) {
1149                 NL_SET_ERR_MSG(extack, "Device is already a port of a team device");
1150                 netdev_err(dev, "Device %s is already a port "
1151                                 "of a team device\n", portname);
1152                 return -EBUSY;
1153         }
1154
1155         if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1156             vlan_uses_dev(dev)) {
1157                 NL_SET_ERR_MSG(extack, "Device is VLAN challenged and team device has VLAN set up");
1158                 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1159                            portname);
1160                 return -EPERM;
1161         }
1162
1163         err = team_dev_type_check_change(dev, port_dev);
1164         if (err)
1165                 return err;
1166
1167         if (port_dev->flags & IFF_UP) {
1168                 NL_SET_ERR_MSG(extack, "Device is up. Set it down before adding it as a team port");
1169                 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1170                            portname);
1171                 return -EBUSY;
1172         }
1173
1174         port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1175                        GFP_KERNEL);
1176         if (!port)
1177                 return -ENOMEM;
1178
1179         port->dev = port_dev;
1180         port->team = team;
1181         INIT_LIST_HEAD(&port->qom_list);
1182
1183         port->orig.mtu = port_dev->mtu;
1184         err = dev_set_mtu(port_dev, dev->mtu);
1185         if (err) {
1186                 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1187                 goto err_set_mtu;
1188         }
1189
1190         memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1191
1192         err = team_port_enter(team, port);
1193         if (err) {
1194                 netdev_err(dev, "Device %s failed to enter team mode\n",
1195                            portname);
1196                 goto err_port_enter;
1197         }
1198
1199         err = dev_open(port_dev);
1200         if (err) {
1201                 netdev_dbg(dev, "Device %s opening failed\n",
1202                            portname);
1203                 goto err_dev_open;
1204         }
1205
1206         netif_addr_lock_bh(dev);
1207         dev_uc_sync_multiple(port_dev, dev);
1208         dev_mc_sync_multiple(port_dev, dev);
1209         netif_addr_unlock_bh(dev);
1210
1211         err = vlan_vids_add_by_dev(port_dev, dev);
1212         if (err) {
1213                 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1214                                 portname);
1215                 goto err_vids_add;
1216         }
1217
1218         err = team_port_enable_netpoll(team, port);
1219         if (err) {
1220                 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1221                            portname);
1222                 goto err_enable_netpoll;
1223         }
1224
1225         if (!(dev->features & NETIF_F_LRO))
1226                 dev_disable_lro(port_dev);
1227
1228         err = netdev_rx_handler_register(port_dev, team_handle_frame,
1229                                          port);
1230         if (err) {
1231                 netdev_err(dev, "Device %s failed to register rx_handler\n",
1232                            portname);
1233                 goto err_handler_register;
1234         }
1235
1236         err = team_upper_dev_link(team, port, extack);
1237         if (err) {
1238                 netdev_err(dev, "Device %s failed to set upper link\n",
1239                            portname);
1240                 goto err_set_upper_link;
1241         }
1242
1243         err = __team_option_inst_add_port(team, port);
1244         if (err) {
1245                 netdev_err(dev, "Device %s failed to add per-port options\n",
1246                            portname);
1247                 goto err_option_port_add;
1248         }
1249
1250         port->index = -1;
1251         list_add_tail_rcu(&port->list, &team->port_list);
1252         team_port_enable(team, port);
1253         __team_compute_features(team);
1254         __team_port_change_port_added(port, !!netif_carrier_ok(port_dev));
1255         __team_options_change_check(team);
1256
1257         netdev_info(dev, "Port device %s added\n", portname);
1258
1259         return 0;
1260
1261 err_option_port_add:
1262         team_upper_dev_unlink(team, port);
1263
1264 err_set_upper_link:
1265         netdev_rx_handler_unregister(port_dev);
1266
1267 err_handler_register:
1268         team_port_disable_netpoll(port);
1269
1270 err_enable_netpoll:
1271         vlan_vids_del_by_dev(port_dev, dev);
1272
1273 err_vids_add:
1274         dev_uc_unsync(port_dev, dev);
1275         dev_mc_unsync(port_dev, dev);
1276         dev_close(port_dev);
1277
1278 err_dev_open:
1279         team_port_leave(team, port);
1280         team_port_set_orig_dev_addr(port);
1281
1282 err_port_enter:
1283         dev_set_mtu(port_dev, port->orig.mtu);
1284
1285 err_set_mtu:
1286         kfree(port);
1287
1288         return err;
1289 }
1290
1291 static void __team_port_change_port_removed(struct team_port *port);
1292
1293 static int team_port_del(struct team *team, struct net_device *port_dev)
1294 {
1295         struct net_device *dev = team->dev;
1296         struct team_port *port;
1297         char *portname = port_dev->name;
1298
1299         port = team_port_get_rtnl(port_dev);
1300         if (!port || !team_port_find(team, port)) {
1301                 netdev_err(dev, "Device %s does not act as a port of this team\n",
1302                            portname);
1303                 return -ENOENT;
1304         }
1305
1306         team_port_disable(team, port);
1307         list_del_rcu(&port->list);
1308         team_upper_dev_unlink(team, port);
1309         netdev_rx_handler_unregister(port_dev);
1310         team_port_disable_netpoll(port);
1311         vlan_vids_del_by_dev(port_dev, dev);
1312         dev_uc_unsync(port_dev, dev);
1313         dev_mc_unsync(port_dev, dev);
1314         dev_close(port_dev);
1315         team_port_leave(team, port);
1316
1317         __team_option_inst_mark_removed_port(team, port);
1318         __team_options_change_check(team);
1319         __team_option_inst_del_port(team, port);
1320         __team_port_change_port_removed(port);
1321
1322         team_port_set_orig_dev_addr(port);
1323         dev_set_mtu(port_dev, port->orig.mtu);
1324         kfree_rcu(port, rcu);
1325         netdev_info(dev, "Port device %s removed\n", portname);
1326         __team_compute_features(team);
1327
1328         return 0;
1329 }
1330
1331
1332 /*****************
1333  * Net device ops
1334  *****************/
1335
1336 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1337 {
1338         ctx->data.str_val = team->mode->kind;
1339         return 0;
1340 }
1341
1342 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1343 {
1344         return team_change_mode(team, ctx->data.str_val);
1345 }
1346
1347 static int team_notify_peers_count_get(struct team *team,
1348                                        struct team_gsetter_ctx *ctx)
1349 {
1350         ctx->data.u32_val = team->notify_peers.count;
1351         return 0;
1352 }
1353
1354 static int team_notify_peers_count_set(struct team *team,
1355                                        struct team_gsetter_ctx *ctx)
1356 {
1357         team->notify_peers.count = ctx->data.u32_val;
1358         return 0;
1359 }
1360
1361 static int team_notify_peers_interval_get(struct team *team,
1362                                           struct team_gsetter_ctx *ctx)
1363 {
1364         ctx->data.u32_val = team->notify_peers.interval;
1365         return 0;
1366 }
1367
1368 static int team_notify_peers_interval_set(struct team *team,
1369                                           struct team_gsetter_ctx *ctx)
1370 {
1371         team->notify_peers.interval = ctx->data.u32_val;
1372         return 0;
1373 }
1374
1375 static int team_mcast_rejoin_count_get(struct team *team,
1376                                        struct team_gsetter_ctx *ctx)
1377 {
1378         ctx->data.u32_val = team->mcast_rejoin.count;
1379         return 0;
1380 }
1381
1382 static int team_mcast_rejoin_count_set(struct team *team,
1383                                        struct team_gsetter_ctx *ctx)
1384 {
1385         team->mcast_rejoin.count = ctx->data.u32_val;
1386         return 0;
1387 }
1388
1389 static int team_mcast_rejoin_interval_get(struct team *team,
1390                                           struct team_gsetter_ctx *ctx)
1391 {
1392         ctx->data.u32_val = team->mcast_rejoin.interval;
1393         return 0;
1394 }
1395
1396 static int team_mcast_rejoin_interval_set(struct team *team,
1397                                           struct team_gsetter_ctx *ctx)
1398 {
1399         team->mcast_rejoin.interval = ctx->data.u32_val;
1400         return 0;
1401 }
1402
1403 static int team_port_en_option_get(struct team *team,
1404                                    struct team_gsetter_ctx *ctx)
1405 {
1406         struct team_port *port = ctx->info->port;
1407
1408         ctx->data.bool_val = team_port_enabled(port);
1409         return 0;
1410 }
1411
1412 static int team_port_en_option_set(struct team *team,
1413                                    struct team_gsetter_ctx *ctx)
1414 {
1415         struct team_port *port = ctx->info->port;
1416
1417         if (ctx->data.bool_val)
1418                 team_port_enable(team, port);
1419         else
1420                 team_port_disable(team, port);
1421         return 0;
1422 }
1423
1424 static int team_user_linkup_option_get(struct team *team,
1425                                        struct team_gsetter_ctx *ctx)
1426 {
1427         struct team_port *port = ctx->info->port;
1428
1429         ctx->data.bool_val = port->user.linkup;
1430         return 0;
1431 }
1432
1433 static void __team_carrier_check(struct team *team);
1434
1435 static int team_user_linkup_option_set(struct team *team,
1436                                        struct team_gsetter_ctx *ctx)
1437 {
1438         struct team_port *port = ctx->info->port;
1439
1440         port->user.linkup = ctx->data.bool_val;
1441         team_refresh_port_linkup(port);
1442         __team_carrier_check(port->team);
1443         return 0;
1444 }
1445
1446 static int team_user_linkup_en_option_get(struct team *team,
1447                                           struct team_gsetter_ctx *ctx)
1448 {
1449         struct team_port *port = ctx->info->port;
1450
1451         ctx->data.bool_val = port->user.linkup_enabled;
1452         return 0;
1453 }
1454
1455 static int team_user_linkup_en_option_set(struct team *team,
1456                                           struct team_gsetter_ctx *ctx)
1457 {
1458         struct team_port *port = ctx->info->port;
1459
1460         port->user.linkup_enabled = ctx->data.bool_val;
1461         team_refresh_port_linkup(port);
1462         __team_carrier_check(port->team);
1463         return 0;
1464 }
1465
1466 static int team_priority_option_get(struct team *team,
1467                                     struct team_gsetter_ctx *ctx)
1468 {
1469         struct team_port *port = ctx->info->port;
1470
1471         ctx->data.s32_val = port->priority;
1472         return 0;
1473 }
1474
1475 static int team_priority_option_set(struct team *team,
1476                                     struct team_gsetter_ctx *ctx)
1477 {
1478         struct team_port *port = ctx->info->port;
1479         s32 priority = ctx->data.s32_val;
1480
1481         if (port->priority == priority)
1482                 return 0;
1483         port->priority = priority;
1484         team_queue_override_port_prio_changed(team, port);
1485         return 0;
1486 }
1487
1488 static int team_queue_id_option_get(struct team *team,
1489                                     struct team_gsetter_ctx *ctx)
1490 {
1491         struct team_port *port = ctx->info->port;
1492
1493         ctx->data.u32_val = port->queue_id;
1494         return 0;
1495 }
1496
1497 static int team_queue_id_option_set(struct team *team,
1498                                     struct team_gsetter_ctx *ctx)
1499 {
1500         struct team_port *port = ctx->info->port;
1501         u16 new_queue_id = ctx->data.u32_val;
1502
1503         if (port->queue_id == new_queue_id)
1504                 return 0;
1505         if (new_queue_id >= team->dev->real_num_tx_queues)
1506                 return -EINVAL;
1507         team_queue_override_port_change_queue_id(team, port, new_queue_id);
1508         return 0;
1509 }
1510
1511 static const struct team_option team_options[] = {
1512         {
1513                 .name = "mode",
1514                 .type = TEAM_OPTION_TYPE_STRING,
1515                 .getter = team_mode_option_get,
1516                 .setter = team_mode_option_set,
1517         },
1518         {
1519                 .name = "notify_peers_count",
1520                 .type = TEAM_OPTION_TYPE_U32,
1521                 .getter = team_notify_peers_count_get,
1522                 .setter = team_notify_peers_count_set,
1523         },
1524         {
1525                 .name = "notify_peers_interval",
1526                 .type = TEAM_OPTION_TYPE_U32,
1527                 .getter = team_notify_peers_interval_get,
1528                 .setter = team_notify_peers_interval_set,
1529         },
1530         {
1531                 .name = "mcast_rejoin_count",
1532                 .type = TEAM_OPTION_TYPE_U32,
1533                 .getter = team_mcast_rejoin_count_get,
1534                 .setter = team_mcast_rejoin_count_set,
1535         },
1536         {
1537                 .name = "mcast_rejoin_interval",
1538                 .type = TEAM_OPTION_TYPE_U32,
1539                 .getter = team_mcast_rejoin_interval_get,
1540                 .setter = team_mcast_rejoin_interval_set,
1541         },
1542         {
1543                 .name = "enabled",
1544                 .type = TEAM_OPTION_TYPE_BOOL,
1545                 .per_port = true,
1546                 .getter = team_port_en_option_get,
1547                 .setter = team_port_en_option_set,
1548         },
1549         {
1550                 .name = "user_linkup",
1551                 .type = TEAM_OPTION_TYPE_BOOL,
1552                 .per_port = true,
1553                 .getter = team_user_linkup_option_get,
1554                 .setter = team_user_linkup_option_set,
1555         },
1556         {
1557                 .name = "user_linkup_enabled",
1558                 .type = TEAM_OPTION_TYPE_BOOL,
1559                 .per_port = true,
1560                 .getter = team_user_linkup_en_option_get,
1561                 .setter = team_user_linkup_en_option_set,
1562         },
1563         {
1564                 .name = "priority",
1565                 .type = TEAM_OPTION_TYPE_S32,
1566                 .per_port = true,
1567                 .getter = team_priority_option_get,
1568                 .setter = team_priority_option_set,
1569         },
1570         {
1571                 .name = "queue_id",
1572                 .type = TEAM_OPTION_TYPE_U32,
1573                 .per_port = true,
1574                 .getter = team_queue_id_option_get,
1575                 .setter = team_queue_id_option_set,
1576         },
1577 };
1578
1579
1580 static int team_init(struct net_device *dev)
1581 {
1582         struct team *team = netdev_priv(dev);
1583         int i;
1584         int err;
1585
1586         team->dev = dev;
1587         mutex_init(&team->lock);
1588         team_set_no_mode(team);
1589
1590         team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1591         if (!team->pcpu_stats)
1592                 return -ENOMEM;
1593
1594         for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1595                 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1596         INIT_LIST_HEAD(&team->port_list);
1597         err = team_queue_override_init(team);
1598         if (err)
1599                 goto err_team_queue_override_init;
1600
1601         team_adjust_ops(team);
1602
1603         INIT_LIST_HEAD(&team->option_list);
1604         INIT_LIST_HEAD(&team->option_inst_list);
1605
1606         team_notify_peers_init(team);
1607         team_mcast_rejoin_init(team);
1608
1609         err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1610         if (err)
1611                 goto err_options_register;
1612         netif_carrier_off(dev);
1613
1614         netdev_lockdep_set_classes(dev);
1615
1616         return 0;
1617
1618 err_options_register:
1619         team_mcast_rejoin_fini(team);
1620         team_notify_peers_fini(team);
1621         team_queue_override_fini(team);
1622 err_team_queue_override_init:
1623         free_percpu(team->pcpu_stats);
1624
1625         return err;
1626 }
1627
1628 static void team_uninit(struct net_device *dev)
1629 {
1630         struct team *team = netdev_priv(dev);
1631         struct team_port *port;
1632         struct team_port *tmp;
1633
1634         mutex_lock(&team->lock);
1635         list_for_each_entry_safe(port, tmp, &team->port_list, list)
1636                 team_port_del(team, port->dev);
1637
1638         __team_change_mode(team, NULL); /* cleanup */
1639         __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1640         team_mcast_rejoin_fini(team);
1641         team_notify_peers_fini(team);
1642         team_queue_override_fini(team);
1643         mutex_unlock(&team->lock);
1644         netdev_change_features(dev);
1645 }
1646
1647 static void team_destructor(struct net_device *dev)
1648 {
1649         struct team *team = netdev_priv(dev);
1650
1651         free_percpu(team->pcpu_stats);
1652 }
1653
1654 static int team_open(struct net_device *dev)
1655 {
1656         return 0;
1657 }
1658
1659 static int team_close(struct net_device *dev)
1660 {
1661         return 0;
1662 }
1663
1664 /*
1665  * note: already called with rcu_read_lock
1666  */
1667 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1668 {
1669         struct team *team = netdev_priv(dev);
1670         bool tx_success;
1671         unsigned int len = skb->len;
1672
1673         tx_success = team_queue_override_transmit(team, skb);
1674         if (!tx_success)
1675                 tx_success = team->ops.transmit(team, skb);
1676         if (tx_success) {
1677                 struct team_pcpu_stats *pcpu_stats;
1678
1679                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1680                 u64_stats_update_begin(&pcpu_stats->syncp);
1681                 pcpu_stats->tx_packets++;
1682                 pcpu_stats->tx_bytes += len;
1683                 u64_stats_update_end(&pcpu_stats->syncp);
1684         } else {
1685                 this_cpu_inc(team->pcpu_stats->tx_dropped);
1686         }
1687
1688         return NETDEV_TX_OK;
1689 }
1690
1691 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1692                              void *accel_priv, select_queue_fallback_t fallback)
1693 {
1694         /*
1695          * This helper function exists to help dev_pick_tx get the correct
1696          * destination queue.  Using a helper function skips a call to
1697          * skb_tx_hash and will put the skbs in the queue we expect on their
1698          * way down to the team driver.
1699          */
1700         u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1701
1702         /*
1703          * Save the original txq to restore before passing to the driver
1704          */
1705         qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1706
1707         if (unlikely(txq >= dev->real_num_tx_queues)) {
1708                 do {
1709                         txq -= dev->real_num_tx_queues;
1710                 } while (txq >= dev->real_num_tx_queues);
1711         }
1712         return txq;
1713 }
1714
1715 static void team_change_rx_flags(struct net_device *dev, int change)
1716 {
1717         struct team *team = netdev_priv(dev);
1718         struct team_port *port;
1719         int inc;
1720
1721         rcu_read_lock();
1722         list_for_each_entry_rcu(port, &team->port_list, list) {
1723                 if (change & IFF_PROMISC) {
1724                         inc = dev->flags & IFF_PROMISC ? 1 : -1;
1725                         dev_set_promiscuity(port->dev, inc);
1726                 }
1727                 if (change & IFF_ALLMULTI) {
1728                         inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1729                         dev_set_allmulti(port->dev, inc);
1730                 }
1731         }
1732         rcu_read_unlock();
1733 }
1734
1735 static void team_set_rx_mode(struct net_device *dev)
1736 {
1737         struct team *team = netdev_priv(dev);
1738         struct team_port *port;
1739
1740         rcu_read_lock();
1741         list_for_each_entry_rcu(port, &team->port_list, list) {
1742                 dev_uc_sync_multiple(port->dev, dev);
1743                 dev_mc_sync_multiple(port->dev, dev);
1744         }
1745         rcu_read_unlock();
1746 }
1747
1748 static int team_set_mac_address(struct net_device *dev, void *p)
1749 {
1750         struct sockaddr *addr = p;
1751         struct team *team = netdev_priv(dev);
1752         struct team_port *port;
1753
1754         if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1755                 return -EADDRNOTAVAIL;
1756         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1757         mutex_lock(&team->lock);
1758         list_for_each_entry(port, &team->port_list, list)
1759                 if (team->ops.port_change_dev_addr)
1760                         team->ops.port_change_dev_addr(team, port);
1761         mutex_unlock(&team->lock);
1762         return 0;
1763 }
1764
1765 static int team_change_mtu(struct net_device *dev, int new_mtu)
1766 {
1767         struct team *team = netdev_priv(dev);
1768         struct team_port *port;
1769         int err;
1770
1771         /*
1772          * Alhough this is reader, it's guarded by team lock. It's not possible
1773          * to traverse list in reverse under rcu_read_lock
1774          */
1775         mutex_lock(&team->lock);
1776         team->port_mtu_change_allowed = true;
1777         list_for_each_entry(port, &team->port_list, list) {
1778                 err = dev_set_mtu(port->dev, new_mtu);
1779                 if (err) {
1780                         netdev_err(dev, "Device %s failed to change mtu",
1781                                    port->dev->name);
1782                         goto unwind;
1783                 }
1784         }
1785         team->port_mtu_change_allowed = false;
1786         mutex_unlock(&team->lock);
1787
1788         dev->mtu = new_mtu;
1789
1790         return 0;
1791
1792 unwind:
1793         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1794                 dev_set_mtu(port->dev, dev->mtu);
1795         team->port_mtu_change_allowed = false;
1796         mutex_unlock(&team->lock);
1797
1798         return err;
1799 }
1800
1801 static void
1802 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1803 {
1804         struct team *team = netdev_priv(dev);
1805         struct team_pcpu_stats *p;
1806         u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1807         u32 rx_dropped = 0, tx_dropped = 0, rx_nohandler = 0;
1808         unsigned int start;
1809         int i;
1810
1811         for_each_possible_cpu(i) {
1812                 p = per_cpu_ptr(team->pcpu_stats, i);
1813                 do {
1814                         start = u64_stats_fetch_begin_irq(&p->syncp);
1815                         rx_packets      = p->rx_packets;
1816                         rx_bytes        = p->rx_bytes;
1817                         rx_multicast    = p->rx_multicast;
1818                         tx_packets      = p->tx_packets;
1819                         tx_bytes        = p->tx_bytes;
1820                 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
1821
1822                 stats->rx_packets       += rx_packets;
1823                 stats->rx_bytes         += rx_bytes;
1824                 stats->multicast        += rx_multicast;
1825                 stats->tx_packets       += tx_packets;
1826                 stats->tx_bytes         += tx_bytes;
1827                 /*
1828                  * rx_dropped, tx_dropped & rx_nohandler are u32,
1829                  * updated without syncp protection.
1830                  */
1831                 rx_dropped      += p->rx_dropped;
1832                 tx_dropped      += p->tx_dropped;
1833                 rx_nohandler    += p->rx_nohandler;
1834         }
1835         stats->rx_dropped       = rx_dropped;
1836         stats->tx_dropped       = tx_dropped;
1837         stats->rx_nohandler     = rx_nohandler;
1838 }
1839
1840 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1841 {
1842         struct team *team = netdev_priv(dev);
1843         struct team_port *port;
1844         int err;
1845
1846         /*
1847          * Alhough this is reader, it's guarded by team lock. It's not possible
1848          * to traverse list in reverse under rcu_read_lock
1849          */
1850         mutex_lock(&team->lock);
1851         list_for_each_entry(port, &team->port_list, list) {
1852                 err = vlan_vid_add(port->dev, proto, vid);
1853                 if (err)
1854                         goto unwind;
1855         }
1856         mutex_unlock(&team->lock);
1857
1858         return 0;
1859
1860 unwind:
1861         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1862                 vlan_vid_del(port->dev, proto, vid);
1863         mutex_unlock(&team->lock);
1864
1865         return err;
1866 }
1867
1868 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1869 {
1870         struct team *team = netdev_priv(dev);
1871         struct team_port *port;
1872
1873         mutex_lock(&team->lock);
1874         list_for_each_entry(port, &team->port_list, list)
1875                 vlan_vid_del(port->dev, proto, vid);
1876         mutex_unlock(&team->lock);
1877
1878         return 0;
1879 }
1880
1881 #ifdef CONFIG_NET_POLL_CONTROLLER
1882 static void team_poll_controller(struct net_device *dev)
1883 {
1884 }
1885
1886 static void __team_netpoll_cleanup(struct team *team)
1887 {
1888         struct team_port *port;
1889
1890         list_for_each_entry(port, &team->port_list, list)
1891                 team_port_disable_netpoll(port);
1892 }
1893
1894 static void team_netpoll_cleanup(struct net_device *dev)
1895 {
1896         struct team *team = netdev_priv(dev);
1897
1898         mutex_lock(&team->lock);
1899         __team_netpoll_cleanup(team);
1900         mutex_unlock(&team->lock);
1901 }
1902
1903 static int team_netpoll_setup(struct net_device *dev,
1904                               struct netpoll_info *npifo)
1905 {
1906         struct team *team = netdev_priv(dev);
1907         struct team_port *port;
1908         int err = 0;
1909
1910         mutex_lock(&team->lock);
1911         list_for_each_entry(port, &team->port_list, list) {
1912                 err = team_port_enable_netpoll(team, port);
1913                 if (err) {
1914                         __team_netpoll_cleanup(team);
1915                         break;
1916                 }
1917         }
1918         mutex_unlock(&team->lock);
1919         return err;
1920 }
1921 #endif
1922
1923 static int team_add_slave(struct net_device *dev, struct net_device *port_dev,
1924                           struct netlink_ext_ack *extack)
1925 {
1926         struct team *team = netdev_priv(dev);
1927         int err;
1928
1929         mutex_lock(&team->lock);
1930         err = team_port_add(team, port_dev, extack);
1931         mutex_unlock(&team->lock);
1932
1933         if (!err)
1934                 netdev_change_features(dev);
1935
1936         return err;
1937 }
1938
1939 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1940 {
1941         struct team *team = netdev_priv(dev);
1942         int err;
1943
1944         mutex_lock(&team->lock);
1945         err = team_port_del(team, port_dev);
1946         mutex_unlock(&team->lock);
1947
1948         if (!err)
1949                 netdev_change_features(dev);
1950
1951         return err;
1952 }
1953
1954 static netdev_features_t team_fix_features(struct net_device *dev,
1955                                            netdev_features_t features)
1956 {
1957         struct team_port *port;
1958         struct team *team = netdev_priv(dev);
1959         netdev_features_t mask;
1960
1961         mask = features;
1962         features &= ~NETIF_F_ONE_FOR_ALL;
1963         features |= NETIF_F_ALL_FOR_ALL;
1964
1965         rcu_read_lock();
1966         list_for_each_entry_rcu(port, &team->port_list, list) {
1967                 features = netdev_increment_features(features,
1968                                                      port->dev->features,
1969                                                      mask);
1970         }
1971         rcu_read_unlock();
1972
1973         features = netdev_add_tso_features(features, mask);
1974
1975         return features;
1976 }
1977
1978 static int team_change_carrier(struct net_device *dev, bool new_carrier)
1979 {
1980         struct team *team = netdev_priv(dev);
1981
1982         team->user_carrier_enabled = true;
1983
1984         if (new_carrier)
1985                 netif_carrier_on(dev);
1986         else
1987                 netif_carrier_off(dev);
1988         return 0;
1989 }
1990
1991 static const struct net_device_ops team_netdev_ops = {
1992         .ndo_init               = team_init,
1993         .ndo_uninit             = team_uninit,
1994         .ndo_open               = team_open,
1995         .ndo_stop               = team_close,
1996         .ndo_start_xmit         = team_xmit,
1997         .ndo_select_queue       = team_select_queue,
1998         .ndo_change_rx_flags    = team_change_rx_flags,
1999         .ndo_set_rx_mode        = team_set_rx_mode,
2000         .ndo_set_mac_address    = team_set_mac_address,
2001         .ndo_change_mtu         = team_change_mtu,
2002         .ndo_get_stats64        = team_get_stats64,
2003         .ndo_vlan_rx_add_vid    = team_vlan_rx_add_vid,
2004         .ndo_vlan_rx_kill_vid   = team_vlan_rx_kill_vid,
2005 #ifdef CONFIG_NET_POLL_CONTROLLER
2006         .ndo_poll_controller    = team_poll_controller,
2007         .ndo_netpoll_setup      = team_netpoll_setup,
2008         .ndo_netpoll_cleanup    = team_netpoll_cleanup,
2009 #endif
2010         .ndo_add_slave          = team_add_slave,
2011         .ndo_del_slave          = team_del_slave,
2012         .ndo_fix_features       = team_fix_features,
2013         .ndo_change_carrier     = team_change_carrier,
2014         .ndo_features_check     = passthru_features_check,
2015 };
2016
2017 /***********************
2018  * ethtool interface
2019  ***********************/
2020
2021 static void team_ethtool_get_drvinfo(struct net_device *dev,
2022                                      struct ethtool_drvinfo *drvinfo)
2023 {
2024         strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
2025         strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2026 }
2027
2028 static const struct ethtool_ops team_ethtool_ops = {
2029         .get_drvinfo            = team_ethtool_get_drvinfo,
2030         .get_link               = ethtool_op_get_link,
2031 };
2032
2033 /***********************
2034  * rt netlink interface
2035  ***********************/
2036
2037 static void team_setup_by_port(struct net_device *dev,
2038                                struct net_device *port_dev)
2039 {
2040         dev->header_ops = port_dev->header_ops;
2041         dev->type = port_dev->type;
2042         dev->hard_header_len = port_dev->hard_header_len;
2043         dev->addr_len = port_dev->addr_len;
2044         dev->mtu = port_dev->mtu;
2045         memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2046         eth_hw_addr_inherit(dev, port_dev);
2047 }
2048
2049 static int team_dev_type_check_change(struct net_device *dev,
2050                                       struct net_device *port_dev)
2051 {
2052         struct team *team = netdev_priv(dev);
2053         char *portname = port_dev->name;
2054         int err;
2055
2056         if (dev->type == port_dev->type)
2057                 return 0;
2058         if (!list_empty(&team->port_list)) {
2059                 netdev_err(dev, "Device %s is of different type\n", portname);
2060                 return -EBUSY;
2061         }
2062         err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2063         err = notifier_to_errno(err);
2064         if (err) {
2065                 netdev_err(dev, "Refused to change device type\n");
2066                 return err;
2067         }
2068         dev_uc_flush(dev);
2069         dev_mc_flush(dev);
2070         team_setup_by_port(dev, port_dev);
2071         call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2072         return 0;
2073 }
2074
2075 static void team_setup(struct net_device *dev)
2076 {
2077         ether_setup(dev);
2078         dev->max_mtu = ETH_MAX_MTU;
2079
2080         dev->netdev_ops = &team_netdev_ops;
2081         dev->ethtool_ops = &team_ethtool_ops;
2082         dev->needs_free_netdev = true;
2083         dev->priv_destructor = team_destructor;
2084         dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2085         dev->priv_flags |= IFF_NO_QUEUE;
2086         dev->priv_flags |= IFF_TEAM;
2087
2088         /*
2089          * Indicate we support unicast address filtering. That way core won't
2090          * bring us to promisc mode in case a unicast addr is added.
2091          * Let this up to underlay drivers.
2092          */
2093         dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2094
2095         dev->features |= NETIF_F_LLTX;
2096         dev->features |= NETIF_F_GRO;
2097
2098         /* Don't allow team devices to change network namespaces. */
2099         dev->features |= NETIF_F_NETNS_LOCAL;
2100
2101         dev->hw_features = TEAM_VLAN_FEATURES |
2102                            NETIF_F_HW_VLAN_CTAG_TX |
2103                            NETIF_F_HW_VLAN_CTAG_RX |
2104                            NETIF_F_HW_VLAN_CTAG_FILTER;
2105
2106         dev->hw_features |= NETIF_F_GSO_ENCAP_ALL;
2107         dev->features |= dev->hw_features;
2108 }
2109
2110 static int team_newlink(struct net *src_net, struct net_device *dev,
2111                         struct nlattr *tb[], struct nlattr *data[],
2112                         struct netlink_ext_ack *extack)
2113 {
2114         if (tb[IFLA_ADDRESS] == NULL)
2115                 eth_hw_addr_random(dev);
2116
2117         return register_netdevice(dev);
2118 }
2119
2120 static int team_validate(struct nlattr *tb[], struct nlattr *data[],
2121                          struct netlink_ext_ack *extack)
2122 {
2123         if (tb[IFLA_ADDRESS]) {
2124                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2125                         return -EINVAL;
2126                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2127                         return -EADDRNOTAVAIL;
2128         }
2129         return 0;
2130 }
2131
2132 static unsigned int team_get_num_tx_queues(void)
2133 {
2134         return TEAM_DEFAULT_NUM_TX_QUEUES;
2135 }
2136
2137 static unsigned int team_get_num_rx_queues(void)
2138 {
2139         return TEAM_DEFAULT_NUM_RX_QUEUES;
2140 }
2141
2142 static struct rtnl_link_ops team_link_ops __read_mostly = {
2143         .kind                   = DRV_NAME,
2144         .priv_size              = sizeof(struct team),
2145         .setup                  = team_setup,
2146         .newlink                = team_newlink,
2147         .validate               = team_validate,
2148         .get_num_tx_queues      = team_get_num_tx_queues,
2149         .get_num_rx_queues      = team_get_num_rx_queues,
2150 };
2151
2152
2153 /***********************************
2154  * Generic netlink custom interface
2155  ***********************************/
2156
2157 static struct genl_family team_nl_family;
2158
2159 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2160         [TEAM_ATTR_UNSPEC]                      = { .type = NLA_UNSPEC, },
2161         [TEAM_ATTR_TEAM_IFINDEX]                = { .type = NLA_U32 },
2162         [TEAM_ATTR_LIST_OPTION]                 = { .type = NLA_NESTED },
2163         [TEAM_ATTR_LIST_PORT]                   = { .type = NLA_NESTED },
2164 };
2165
2166 static const struct nla_policy
2167 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2168         [TEAM_ATTR_OPTION_UNSPEC]               = { .type = NLA_UNSPEC, },
2169         [TEAM_ATTR_OPTION_NAME] = {
2170                 .type = NLA_STRING,
2171                 .len = TEAM_STRING_MAX_LEN,
2172         },
2173         [TEAM_ATTR_OPTION_CHANGED]              = { .type = NLA_FLAG },
2174         [TEAM_ATTR_OPTION_TYPE]                 = { .type = NLA_U8 },
2175         [TEAM_ATTR_OPTION_DATA]                 = { .type = NLA_BINARY },
2176 };
2177
2178 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2179 {
2180         struct sk_buff *msg;
2181         void *hdr;
2182         int err;
2183
2184         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2185         if (!msg)
2186                 return -ENOMEM;
2187
2188         hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2189                           &team_nl_family, 0, TEAM_CMD_NOOP);
2190         if (!hdr) {
2191                 err = -EMSGSIZE;
2192                 goto err_msg_put;
2193         }
2194
2195         genlmsg_end(msg, hdr);
2196
2197         return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2198
2199 err_msg_put:
2200         nlmsg_free(msg);
2201
2202         return err;
2203 }
2204
2205 /*
2206  * Netlink cmd functions should be locked by following two functions.
2207  * Since dev gets held here, that ensures dev won't disappear in between.
2208  */
2209 static struct team *team_nl_team_get(struct genl_info *info)
2210 {
2211         struct net *net = genl_info_net(info);
2212         int ifindex;
2213         struct net_device *dev;
2214         struct team *team;
2215
2216         if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2217                 return NULL;
2218
2219         ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2220         dev = dev_get_by_index(net, ifindex);
2221         if (!dev || dev->netdev_ops != &team_netdev_ops) {
2222                 if (dev)
2223                         dev_put(dev);
2224                 return NULL;
2225         }
2226
2227         team = netdev_priv(dev);
2228         mutex_lock(&team->lock);
2229         return team;
2230 }
2231
2232 static void team_nl_team_put(struct team *team)
2233 {
2234         mutex_unlock(&team->lock);
2235         dev_put(team->dev);
2236 }
2237
2238 typedef int team_nl_send_func_t(struct sk_buff *skb,
2239                                 struct team *team, u32 portid);
2240
2241 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2242 {
2243         return genlmsg_unicast(dev_net(team->dev), skb, portid);
2244 }
2245
2246 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2247                                        struct team_option_inst *opt_inst)
2248 {
2249         struct nlattr *option_item;
2250         struct team_option *option = opt_inst->option;
2251         struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2252         struct team_gsetter_ctx ctx;
2253         int err;
2254
2255         ctx.info = opt_inst_info;
2256         err = team_option_get(team, opt_inst, &ctx);
2257         if (err)
2258                 return err;
2259
2260         option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
2261         if (!option_item)
2262                 return -EMSGSIZE;
2263
2264         if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2265                 goto nest_cancel;
2266         if (opt_inst_info->port &&
2267             nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2268                         opt_inst_info->port->dev->ifindex))
2269                 goto nest_cancel;
2270         if (opt_inst->option->array_size &&
2271             nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2272                         opt_inst_info->array_index))
2273                 goto nest_cancel;
2274
2275         switch (option->type) {
2276         case TEAM_OPTION_TYPE_U32:
2277                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2278                         goto nest_cancel;
2279                 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2280                         goto nest_cancel;
2281                 break;
2282         case TEAM_OPTION_TYPE_STRING:
2283                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2284                         goto nest_cancel;
2285                 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2286                                    ctx.data.str_val))
2287                         goto nest_cancel;
2288                 break;
2289         case TEAM_OPTION_TYPE_BINARY:
2290                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2291                         goto nest_cancel;
2292                 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2293                             ctx.data.bin_val.ptr))
2294                         goto nest_cancel;
2295                 break;
2296         case TEAM_OPTION_TYPE_BOOL:
2297                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2298                         goto nest_cancel;
2299                 if (ctx.data.bool_val &&
2300                     nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2301                         goto nest_cancel;
2302                 break;
2303         case TEAM_OPTION_TYPE_S32:
2304                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2305                         goto nest_cancel;
2306                 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2307                         goto nest_cancel;
2308                 break;
2309         default:
2310                 BUG();
2311         }
2312         if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2313                 goto nest_cancel;
2314         if (opt_inst->changed) {
2315                 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2316                         goto nest_cancel;
2317                 opt_inst->changed = false;
2318         }
2319         nla_nest_end(skb, option_item);
2320         return 0;
2321
2322 nest_cancel:
2323         nla_nest_cancel(skb, option_item);
2324         return -EMSGSIZE;
2325 }
2326
2327 static int __send_and_alloc_skb(struct sk_buff **pskb,
2328                                 struct team *team, u32 portid,
2329                                 team_nl_send_func_t *send_func)
2330 {
2331         int err;
2332
2333         if (*pskb) {
2334                 err = send_func(*pskb, team, portid);
2335                 if (err)
2336                         return err;
2337         }
2338         *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2339         if (!*pskb)
2340                 return -ENOMEM;
2341         return 0;
2342 }
2343
2344 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2345                                     int flags, team_nl_send_func_t *send_func,
2346                                     struct list_head *sel_opt_inst_list)
2347 {
2348         struct nlattr *option_list;
2349         struct nlmsghdr *nlh;
2350         void *hdr;
2351         struct team_option_inst *opt_inst;
2352         int err;
2353         struct sk_buff *skb = NULL;
2354         bool incomplete;
2355         int i;
2356
2357         opt_inst = list_first_entry(sel_opt_inst_list,
2358                                     struct team_option_inst, tmp_list);
2359
2360 start_again:
2361         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2362         if (err)
2363                 return err;
2364
2365         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2366                           TEAM_CMD_OPTIONS_GET);
2367         if (!hdr) {
2368                 nlmsg_free(skb);
2369                 return -EMSGSIZE;
2370         }
2371
2372         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2373                 goto nla_put_failure;
2374         option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2375         if (!option_list)
2376                 goto nla_put_failure;
2377
2378         i = 0;
2379         incomplete = false;
2380         list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2381                 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2382                 if (err) {
2383                         if (err == -EMSGSIZE) {
2384                                 if (!i)
2385                                         goto errout;
2386                                 incomplete = true;
2387                                 break;
2388                         }
2389                         goto errout;
2390                 }
2391                 i++;
2392         }
2393
2394         nla_nest_end(skb, option_list);
2395         genlmsg_end(skb, hdr);
2396         if (incomplete)
2397                 goto start_again;
2398
2399 send_done:
2400         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2401         if (!nlh) {
2402                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2403                 if (err)
2404                         goto errout;
2405                 goto send_done;
2406         }
2407
2408         return send_func(skb, team, portid);
2409
2410 nla_put_failure:
2411         err = -EMSGSIZE;
2412 errout:
2413         genlmsg_cancel(skb, hdr);
2414         nlmsg_free(skb);
2415         return err;
2416 }
2417
2418 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2419 {
2420         struct team *team;
2421         struct team_option_inst *opt_inst;
2422         int err;
2423         LIST_HEAD(sel_opt_inst_list);
2424
2425         team = team_nl_team_get(info);
2426         if (!team)
2427                 return -EINVAL;
2428
2429         list_for_each_entry(opt_inst, &team->option_inst_list, list)
2430                 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2431         err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2432                                        NLM_F_ACK, team_nl_send_unicast,
2433                                        &sel_opt_inst_list);
2434
2435         team_nl_team_put(team);
2436
2437         return err;
2438 }
2439
2440 static int team_nl_send_event_options_get(struct team *team,
2441                                           struct list_head *sel_opt_inst_list);
2442
2443 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2444 {
2445         struct team *team;
2446         int err = 0;
2447         int i;
2448         struct nlattr *nl_option;
2449         LIST_HEAD(opt_inst_list);
2450
2451         rtnl_lock();
2452
2453         team = team_nl_team_get(info);
2454         if (!team) {
2455                 err = -EINVAL;
2456                 goto rtnl_unlock;
2457         }
2458
2459         err = -EINVAL;
2460         if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2461                 err = -EINVAL;
2462                 goto team_put;
2463         }
2464
2465         nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2466                 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2467                 struct nlattr *attr;
2468                 struct nlattr *attr_data;
2469                 enum team_option_type opt_type;
2470                 int opt_port_ifindex = 0; /* != 0 for per-port options */
2471                 u32 opt_array_index = 0;
2472                 bool opt_is_array = false;
2473                 struct team_option_inst *opt_inst;
2474                 char *opt_name;
2475                 bool opt_found = false;
2476
2477                 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2478                         err = -EINVAL;
2479                         goto team_put;
2480                 }
2481                 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2482                                        nl_option, team_nl_option_policy,
2483                                        info->extack);
2484                 if (err)
2485                         goto team_put;
2486                 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2487                     !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2488                         err = -EINVAL;
2489                         goto team_put;
2490                 }
2491                 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2492                 case NLA_U32:
2493                         opt_type = TEAM_OPTION_TYPE_U32;
2494                         break;
2495                 case NLA_STRING:
2496                         opt_type = TEAM_OPTION_TYPE_STRING;
2497                         break;
2498                 case NLA_BINARY:
2499                         opt_type = TEAM_OPTION_TYPE_BINARY;
2500                         break;
2501                 case NLA_FLAG:
2502                         opt_type = TEAM_OPTION_TYPE_BOOL;
2503                         break;
2504                 case NLA_S32:
2505                         opt_type = TEAM_OPTION_TYPE_S32;
2506                         break;
2507                 default:
2508                         goto team_put;
2509                 }
2510
2511                 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2512                 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2513                         err = -EINVAL;
2514                         goto team_put;
2515                 }
2516
2517                 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2518                 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2519                 if (attr)
2520                         opt_port_ifindex = nla_get_u32(attr);
2521
2522                 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2523                 if (attr) {
2524                         opt_is_array = true;
2525                         opt_array_index = nla_get_u32(attr);
2526                 }
2527
2528                 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2529                         struct team_option *option = opt_inst->option;
2530                         struct team_gsetter_ctx ctx;
2531                         struct team_option_inst_info *opt_inst_info;
2532                         int tmp_ifindex;
2533
2534                         opt_inst_info = &opt_inst->info;
2535                         tmp_ifindex = opt_inst_info->port ?
2536                                       opt_inst_info->port->dev->ifindex : 0;
2537                         if (option->type != opt_type ||
2538                             strcmp(option->name, opt_name) ||
2539                             tmp_ifindex != opt_port_ifindex ||
2540                             (option->array_size && !opt_is_array) ||
2541                             opt_inst_info->array_index != opt_array_index)
2542                                 continue;
2543                         opt_found = true;
2544                         ctx.info = opt_inst_info;
2545                         switch (opt_type) {
2546                         case TEAM_OPTION_TYPE_U32:
2547                                 ctx.data.u32_val = nla_get_u32(attr_data);
2548                                 break;
2549                         case TEAM_OPTION_TYPE_STRING:
2550                                 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2551                                         err = -EINVAL;
2552                                         goto team_put;
2553                                 }
2554                                 ctx.data.str_val = nla_data(attr_data);
2555                                 break;
2556                         case TEAM_OPTION_TYPE_BINARY:
2557                                 ctx.data.bin_val.len = nla_len(attr_data);
2558                                 ctx.data.bin_val.ptr = nla_data(attr_data);
2559                                 break;
2560                         case TEAM_OPTION_TYPE_BOOL:
2561                                 ctx.data.bool_val = attr_data ? true : false;
2562                                 break;
2563                         case TEAM_OPTION_TYPE_S32:
2564                                 ctx.data.s32_val = nla_get_s32(attr_data);
2565                                 break;
2566                         default:
2567                                 BUG();
2568                         }
2569                         err = team_option_set(team, opt_inst, &ctx);
2570                         if (err)
2571                                 goto team_put;
2572                         opt_inst->changed = true;
2573                         list_add(&opt_inst->tmp_list, &opt_inst_list);
2574                 }
2575                 if (!opt_found) {
2576                         err = -ENOENT;
2577                         goto team_put;
2578                 }
2579         }
2580
2581         err = team_nl_send_event_options_get(team, &opt_inst_list);
2582
2583 team_put:
2584         team_nl_team_put(team);
2585 rtnl_unlock:
2586         rtnl_unlock();
2587         return err;
2588 }
2589
2590 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2591                                      struct team_port *port)
2592 {
2593         struct nlattr *port_item;
2594
2595         port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2596         if (!port_item)
2597                 goto nest_cancel;
2598         if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2599                 goto nest_cancel;
2600         if (port->changed) {
2601                 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2602                         goto nest_cancel;
2603                 port->changed = false;
2604         }
2605         if ((port->removed &&
2606              nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2607             (port->state.linkup &&
2608              nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2609             nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2610             nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2611                 goto nest_cancel;
2612         nla_nest_end(skb, port_item);
2613         return 0;
2614
2615 nest_cancel:
2616         nla_nest_cancel(skb, port_item);
2617         return -EMSGSIZE;
2618 }
2619
2620 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2621                                       int flags, team_nl_send_func_t *send_func,
2622                                       struct team_port *one_port)
2623 {
2624         struct nlattr *port_list;
2625         struct nlmsghdr *nlh;
2626         void *hdr;
2627         struct team_port *port;
2628         int err;
2629         struct sk_buff *skb = NULL;
2630         bool incomplete;
2631         int i;
2632
2633         port = list_first_entry_or_null(&team->port_list,
2634                                         struct team_port, list);
2635
2636 start_again:
2637         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2638         if (err)
2639                 return err;
2640
2641         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2642                           TEAM_CMD_PORT_LIST_GET);
2643         if (!hdr) {
2644                 nlmsg_free(skb);
2645                 return -EMSGSIZE;
2646         }
2647
2648         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2649                 goto nla_put_failure;
2650         port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2651         if (!port_list)
2652                 goto nla_put_failure;
2653
2654         i = 0;
2655         incomplete = false;
2656
2657         /* If one port is selected, called wants to send port list containing
2658          * only this port. Otherwise go through all listed ports and send all
2659          */
2660         if (one_port) {
2661                 err = team_nl_fill_one_port_get(skb, one_port);
2662                 if (err)
2663                         goto errout;
2664         } else if (port) {
2665                 list_for_each_entry_from(port, &team->port_list, list) {
2666                         err = team_nl_fill_one_port_get(skb, port);
2667                         if (err) {
2668                                 if (err == -EMSGSIZE) {
2669                                         if (!i)
2670                                                 goto errout;
2671                                         incomplete = true;
2672                                         break;
2673                                 }
2674                                 goto errout;
2675                         }
2676                         i++;
2677                 }
2678         }
2679
2680         nla_nest_end(skb, port_list);
2681         genlmsg_end(skb, hdr);
2682         if (incomplete)
2683                 goto start_again;
2684
2685 send_done:
2686         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2687         if (!nlh) {
2688                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2689                 if (err)
2690                         goto errout;
2691                 goto send_done;
2692         }
2693
2694         return send_func(skb, team, portid);
2695
2696 nla_put_failure:
2697         err = -EMSGSIZE;
2698 errout:
2699         genlmsg_cancel(skb, hdr);
2700         nlmsg_free(skb);
2701         return err;
2702 }
2703
2704 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2705                                      struct genl_info *info)
2706 {
2707         struct team *team;
2708         int err;
2709
2710         team = team_nl_team_get(info);
2711         if (!team)
2712                 return -EINVAL;
2713
2714         err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2715                                          NLM_F_ACK, team_nl_send_unicast, NULL);
2716
2717         team_nl_team_put(team);
2718
2719         return err;
2720 }
2721
2722 static const struct genl_ops team_nl_ops[] = {
2723         {
2724                 .cmd = TEAM_CMD_NOOP,
2725                 .doit = team_nl_cmd_noop,
2726                 .policy = team_nl_policy,
2727         },
2728         {
2729                 .cmd = TEAM_CMD_OPTIONS_SET,
2730                 .doit = team_nl_cmd_options_set,
2731                 .policy = team_nl_policy,
2732                 .flags = GENL_ADMIN_PERM,
2733         },
2734         {
2735                 .cmd = TEAM_CMD_OPTIONS_GET,
2736                 .doit = team_nl_cmd_options_get,
2737                 .policy = team_nl_policy,
2738                 .flags = GENL_ADMIN_PERM,
2739         },
2740         {
2741                 .cmd = TEAM_CMD_PORT_LIST_GET,
2742                 .doit = team_nl_cmd_port_list_get,
2743                 .policy = team_nl_policy,
2744                 .flags = GENL_ADMIN_PERM,
2745         },
2746 };
2747
2748 static const struct genl_multicast_group team_nl_mcgrps[] = {
2749         { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2750 };
2751
2752 static struct genl_family team_nl_family __ro_after_init = {
2753         .name           = TEAM_GENL_NAME,
2754         .version        = TEAM_GENL_VERSION,
2755         .maxattr        = TEAM_ATTR_MAX,
2756         .netnsok        = true,
2757         .module         = THIS_MODULE,
2758         .ops            = team_nl_ops,
2759         .n_ops          = ARRAY_SIZE(team_nl_ops),
2760         .mcgrps         = team_nl_mcgrps,
2761         .n_mcgrps       = ARRAY_SIZE(team_nl_mcgrps),
2762 };
2763
2764 static int team_nl_send_multicast(struct sk_buff *skb,
2765                                   struct team *team, u32 portid)
2766 {
2767         return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2768                                        skb, 0, 0, GFP_KERNEL);
2769 }
2770
2771 static int team_nl_send_event_options_get(struct team *team,
2772                                           struct list_head *sel_opt_inst_list)
2773 {
2774         return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2775                                         sel_opt_inst_list);
2776 }
2777
2778 static int team_nl_send_event_port_get(struct team *team,
2779                                        struct team_port *port)
2780 {
2781         return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2782                                           port);
2783 }
2784
2785 static int __init team_nl_init(void)
2786 {
2787         return genl_register_family(&team_nl_family);
2788 }
2789
2790 static void team_nl_fini(void)
2791 {
2792         genl_unregister_family(&team_nl_family);
2793 }
2794
2795
2796 /******************
2797  * Change checkers
2798  ******************/
2799
2800 static void __team_options_change_check(struct team *team)
2801 {
2802         int err;
2803         struct team_option_inst *opt_inst;
2804         LIST_HEAD(sel_opt_inst_list);
2805
2806         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2807                 if (opt_inst->changed)
2808                         list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2809         }
2810         err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2811         if (err && err != -ESRCH)
2812                 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2813                             err);
2814 }
2815
2816 /* rtnl lock is held */
2817
2818 static void __team_port_change_send(struct team_port *port, bool linkup)
2819 {
2820         int err;
2821
2822         port->changed = true;
2823         port->state.linkup = linkup;
2824         team_refresh_port_linkup(port);
2825         if (linkup) {
2826                 struct ethtool_link_ksettings ecmd;
2827
2828                 err = __ethtool_get_link_ksettings(port->dev, &ecmd);
2829                 if (!err) {
2830                         port->state.speed = ecmd.base.speed;
2831                         port->state.duplex = ecmd.base.duplex;
2832                         goto send_event;
2833                 }
2834         }
2835         port->state.speed = 0;
2836         port->state.duplex = 0;
2837
2838 send_event:
2839         err = team_nl_send_event_port_get(port->team, port);
2840         if (err && err != -ESRCH)
2841                 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2842                             port->dev->name, err);
2843
2844 }
2845
2846 static void __team_carrier_check(struct team *team)
2847 {
2848         struct team_port *port;
2849         bool team_linkup;
2850
2851         if (team->user_carrier_enabled)
2852                 return;
2853
2854         team_linkup = false;
2855         list_for_each_entry(port, &team->port_list, list) {
2856                 if (port->linkup) {
2857                         team_linkup = true;
2858                         break;
2859                 }
2860         }
2861
2862         if (team_linkup)
2863                 netif_carrier_on(team->dev);
2864         else
2865                 netif_carrier_off(team->dev);
2866 }
2867
2868 static void __team_port_change_check(struct team_port *port, bool linkup)
2869 {
2870         if (port->state.linkup != linkup)
2871                 __team_port_change_send(port, linkup);
2872         __team_carrier_check(port->team);
2873 }
2874
2875 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2876 {
2877         __team_port_change_send(port, linkup);
2878         __team_carrier_check(port->team);
2879 }
2880
2881 static void __team_port_change_port_removed(struct team_port *port)
2882 {
2883         port->removed = true;
2884         __team_port_change_send(port, false);
2885         __team_carrier_check(port->team);
2886 }
2887
2888 static void team_port_change_check(struct team_port *port, bool linkup)
2889 {
2890         struct team *team = port->team;
2891
2892         mutex_lock(&team->lock);
2893         __team_port_change_check(port, linkup);
2894         mutex_unlock(&team->lock);
2895 }
2896
2897
2898 /************************************
2899  * Net device notifier event handler
2900  ************************************/
2901
2902 static int team_device_event(struct notifier_block *unused,
2903                              unsigned long event, void *ptr)
2904 {
2905         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2906         struct team_port *port;
2907
2908         port = team_port_get_rtnl(dev);
2909         if (!port)
2910                 return NOTIFY_DONE;
2911
2912         switch (event) {
2913         case NETDEV_UP:
2914                 if (netif_carrier_ok(dev))
2915                         team_port_change_check(port, true);
2916                 break;
2917         case NETDEV_DOWN:
2918                 team_port_change_check(port, false);
2919                 break;
2920         case NETDEV_CHANGE:
2921                 if (netif_running(port->dev))
2922                         team_port_change_check(port,
2923                                                !!netif_carrier_ok(port->dev));
2924                 break;
2925         case NETDEV_UNREGISTER:
2926                 team_del_slave(port->team->dev, dev);
2927                 break;
2928         case NETDEV_FEAT_CHANGE:
2929                 team_compute_features(port->team);
2930                 break;
2931         case NETDEV_PRECHANGEMTU:
2932                 /* Forbid to change mtu of underlaying device */
2933                 if (!port->team->port_mtu_change_allowed)
2934                         return NOTIFY_BAD;
2935                 break;
2936         case NETDEV_PRE_TYPE_CHANGE:
2937                 /* Forbid to change type of underlaying device */
2938                 return NOTIFY_BAD;
2939         case NETDEV_RESEND_IGMP:
2940                 /* Propagate to master device */
2941                 call_netdevice_notifiers(event, port->team->dev);
2942                 break;
2943         }
2944         return NOTIFY_DONE;
2945 }
2946
2947 static struct notifier_block team_notifier_block __read_mostly = {
2948         .notifier_call = team_device_event,
2949 };
2950
2951
2952 /***********************
2953  * Module init and exit
2954  ***********************/
2955
2956 static int __init team_module_init(void)
2957 {
2958         int err;
2959
2960         register_netdevice_notifier(&team_notifier_block);
2961
2962         err = rtnl_link_register(&team_link_ops);
2963         if (err)
2964                 goto err_rtnl_reg;
2965
2966         err = team_nl_init();
2967         if (err)
2968                 goto err_nl_init;
2969
2970         return 0;
2971
2972 err_nl_init:
2973         rtnl_link_unregister(&team_link_ops);
2974
2975 err_rtnl_reg:
2976         unregister_netdevice_notifier(&team_notifier_block);
2977
2978         return err;
2979 }
2980
2981 static void __exit team_module_exit(void)
2982 {
2983         team_nl_fini();
2984         rtnl_link_unregister(&team_link_ops);
2985         unregister_netdevice_notifier(&team_notifier_block);
2986 }
2987
2988 module_init(team_module_init);
2989 module_exit(team_module_exit);
2990
2991 MODULE_LICENSE("GPL v2");
2992 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
2993 MODULE_DESCRIPTION("Ethernet team device driver");
2994 MODULE_ALIAS_RTNL_LINK(DRV_NAME);