drivers/net/team/team.c

   1 /*
   2  * drivers/net/team/team.c - Network team device driver
   3  * Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/types.h>
  13 #include <linux/module.h>
  14 #include <linux/init.h>
  15 #include <linux/slab.h>
  16 #include <linux/rcupdate.h>
  17 #include <linux/errno.h>
  18 #include <linux/ctype.h>
  19 #include <linux/notifier.h>
  20 #include <linux/netdevice.h>
  21 #include <linux/netpoll.h>
  22 #include <linux/if_vlan.h>
  23 #include <linux/if_arp.h>
  24 #include <linux/socket.h>
  25 #include <linux/etherdevice.h>
  26 #include <linux/rtnetlink.h>
  27 #include <net/rtnetlink.h>
  28 #include <net/genetlink.h>
  29 #include <net/netlink.h>
  30 #include <net/sch_generic.h>
  31 #include <generated/utsrelease.h>
  32 #include <linux/if_team.h>
  33
  34 #define DRV_NAME "team"
  35
  36
  37 /**********
  38  * Helpers
  39  **********/
  40
  41 #define team_port_exists(dev) (dev->priv_flags & IFF_TEAM_PORT)
  42
  43 static struct team_port *team_port_get_rtnl(const struct net_device *dev)
  44 {
  45         struct team_port *port = rtnl_dereference(dev->rx_handler_data);
  46
  47         return team_port_exists(dev) ? port : NULL;
  48 }
  49
  50 /*
  51  * Since the ability to change device address for open port device is tested in
  52  * team_port_add, this function can be called without control of return value
  53  */
  54 static int __set_port_dev_addr(struct net_device *port_dev,
  55                                const unsigned char *dev_addr)
  56 {
  57         struct sockaddr_storage addr;
  58
  59         memcpy(addr.__data, dev_addr, port_dev->addr_len);
  60         addr.ss_family = port_dev->type;
  61         return dev_set_mac_address(port_dev, (struct sockaddr *)&addr, NULL);
  62 }
  63
  64 static int team_port_set_orig_dev_addr(struct team_port *port)
  65 {
  66         return __set_port_dev_addr(port->dev, port->orig.dev_addr);
  67 }
  68
  69 static int team_port_set_team_dev_addr(struct team *team,
  70                                        struct team_port *port)
  71 {
  72         return __set_port_dev_addr(port->dev, team->dev->dev_addr);
  73 }
  74
  75 int team_modeop_port_enter(struct team *team, struct team_port *port)
  76 {
  77         return team_port_set_team_dev_addr(team, port);
  78 }
  79 EXPORT_SYMBOL(team_modeop_port_enter);
  80
  81 void team_modeop_port_change_dev_addr(struct team *team,
  82                                       struct team_port *port)
  83 {
  84         team_port_set_team_dev_addr(team, port);
  85 }
  86 EXPORT_SYMBOL(team_modeop_port_change_dev_addr);
  87
  88 static void team_lower_state_changed(struct team_port *port)
  89 {
  90         struct netdev_lag_lower_state_info info;
  91
  92         info.link_up = port->linkup;
  93         info.tx_enabled = team_port_enabled(port);
  94         netdev_lower_state_changed(port->dev, &info);
  95 }
  96
  97 static void team_refresh_port_linkup(struct team_port *port)
  98 {
  99         bool new_linkup = port->user.linkup_enabled ? port->user.linkup :
 100                                                       port->state.linkup;
 101
 102         if (port->linkup != new_linkup) {
 103                 port->linkup = new_linkup;
 104                 team_lower_state_changed(port);
 105         }
 106 }
 107
 108
 109 /*******************
 110  * Options handling
 111  *******************/
 112
 113 struct team_option_inst { /* One for each option instance */
 114         struct list_head list;
 115         struct list_head tmp_list;
 116         struct team_option *option;
 117         struct team_option_inst_info info;
 118         bool changed;
 119         bool removed;
 120 };
 121
 122 static struct team_option *__team_find_option(struct team *team,
 123                                               const char *opt_name)
 124 {
 125         struct team_option *option;
 126
 127         list_for_each_entry(option, &team->option_list, list) {
 128                 if (strcmp(option->name, opt_name) == 0)
 129                         return option;
 130         }
 131         return NULL;
 132 }
 133
 134 static void __team_option_inst_del(struct team_option_inst *opt_inst)
 135 {
 136         list_del(&opt_inst->list);
 137         kfree(opt_inst);
 138 }
 139
 140 static void __team_option_inst_del_option(struct team *team,
 141                                           struct team_option *option)
 142 {
 143         struct team_option_inst *opt_inst, *tmp;
 144
 145         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 146                 if (opt_inst->option == option)
 147                         __team_option_inst_del(opt_inst);
 148         }
 149 }
 150
 151 static int __team_option_inst_add(struct team *team, struct team_option *option,
 152                                   struct team_port *port)
 153 {
 154         struct team_option_inst *opt_inst;
 155         unsigned int array_size;
 156         unsigned int i;
 157         int err;
 158
 159         array_size = option->array_size;
 160         if (!array_size)
 161                 array_size = 1; /* No array but still need one instance */
 162
 163         for (i = 0; i < array_size; i++) {
 164                 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL);
 165                 if (!opt_inst)
 166                         return -ENOMEM;
 167                 opt_inst->option = option;
 168                 opt_inst->info.port = port;
 169                 opt_inst->info.array_index = i;
 170                 opt_inst->changed = true;
 171                 opt_inst->removed = false;
 172                 list_add_tail(&opt_inst->list, &team->option_inst_list);
 173                 if (option->init) {
 174                         err = option->init(team, &opt_inst->info);
 175                         if (err)
 176                                 return err;
 177                 }
 178
 179         }
 180         return 0;
 181 }
 182
 183 static int __team_option_inst_add_option(struct team *team,
 184                                          struct team_option *option)
 185 {
 186         int err;
 187
 188         if (!option->per_port) {
 189                 err = __team_option_inst_add(team, option, NULL);
 190                 if (err)
 191                         goto inst_del_option;
 192         }
 193         return 0;
 194
 195 inst_del_option:
 196         __team_option_inst_del_option(team, option);
 197         return err;
 198 }
 199
 200 static void __team_option_inst_mark_removed_option(struct team *team,
 201                                                    struct team_option *option)
 202 {
 203         struct team_option_inst *opt_inst;
 204
 205         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 206                 if (opt_inst->option == option) {
 207                         opt_inst->changed = true;
 208                         opt_inst->removed = true;
 209                 }
 210         }
 211 }
 212
 213 static void __team_option_inst_del_port(struct team *team,
 214                                         struct team_port *port)
 215 {
 216         struct team_option_inst *opt_inst, *tmp;
 217
 218         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 219                 if (opt_inst->option->per_port &&
 220                     opt_inst->info.port == port)
 221                         __team_option_inst_del(opt_inst);
 222         }
 223 }
 224
 225 static int __team_option_inst_add_port(struct team *team,
 226                                        struct team_port *port)
 227 {
 228         struct team_option *option;
 229         int err;
 230
 231         list_for_each_entry(option, &team->option_list, list) {
 232                 if (!option->per_port)
 233                         continue;
 234                 err = __team_option_inst_add(team, option, port);
 235                 if (err)
 236                         goto inst_del_port;
 237         }
 238         return 0;
 239
 240 inst_del_port:
 241         __team_option_inst_del_port(team, port);
 242         return err;
 243 }
 244
 245 static void __team_option_inst_mark_removed_port(struct team *team,
 246                                                  struct team_port *port)
 247 {
 248         struct team_option_inst *opt_inst;
 249
 250         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 251                 if (opt_inst->info.port == port) {
 252                         opt_inst->changed = true;
 253                         opt_inst->removed = true;
 254                 }
 255         }
 256 }
 257
 258 static int __team_options_register(struct team *team,
 259                                    const struct team_option *option,
 260                                    size_t option_count)
 261 {
 262         int i;
 263         struct team_option **dst_opts;
 264         int err;
 265
 266         dst_opts = kcalloc(option_count, sizeof(struct team_option *),
 267                            GFP_KERNEL);
 268         if (!dst_opts)
 269                 return -ENOMEM;
 270         for (i = 0; i < option_count; i++, option++) {
 271                 if (__team_find_option(team, option->name)) {
 272                         err = -EEXIST;
 273                         goto alloc_rollback;
 274                 }
 275                 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
 276                 if (!dst_opts[i]) {
 277                         err = -ENOMEM;
 278                         goto alloc_rollback;
 279                 }
 280         }
 281
 282         for (i = 0; i < option_count; i++) {
 283                 err = __team_option_inst_add_option(team, dst_opts[i]);
 284                 if (err)
 285                         goto inst_rollback;
 286                 list_add_tail(&dst_opts[i]->list, &team->option_list);
 287         }
 288
 289         kfree(dst_opts);
 290         return 0;
 291
 292 inst_rollback:
 293         for (i--; i >= 0; i--)
 294                 __team_option_inst_del_option(team, dst_opts[i]);
 295
 296         i = option_count - 1;
 297 alloc_rollback:
 298         for (i--; i >= 0; i--)
 299                 kfree(dst_opts[i]);
 300
 301         kfree(dst_opts);
 302         return err;
 303 }
 304
 305 static void __team_options_mark_removed(struct team *team,
 306                                         const struct team_option *option,
 307                                         size_t option_count)
 308 {
 309         int i;
 310
 311         for (i = 0; i < option_count; i++, option++) {
 312                 struct team_option *del_opt;
 313
 314                 del_opt = __team_find_option(team, option->name);
 315                 if (del_opt)
 316                         __team_option_inst_mark_removed_option(team, del_opt);
 317         }
 318 }
 319
 320 static void __team_options_unregister(struct team *team,
 321                                       const struct team_option *option,
 322                                       size_t option_count)
 323 {
 324         int i;
 325
 326         for (i = 0; i < option_count; i++, option++) {
 327                 struct team_option *del_opt;
 328
 329                 del_opt = __team_find_option(team, option->name);
 330                 if (del_opt) {
 331                         __team_option_inst_del_option(team, del_opt);
 332                         list_del(&del_opt->list);
 333                         kfree(del_opt);
 334                 }
 335         }
 336 }
 337
 338 static void __team_options_change_check(struct team *team);
 339
 340 int team_options_register(struct team *team,
 341                           const struct team_option *option,
 342                           size_t option_count)
 343 {
 344         int err;
 345
 346         err = __team_options_register(team, option, option_count);
 347         if (err)
 348                 return err;
 349         __team_options_change_check(team);
 350         return 0;
 351 }
 352 EXPORT_SYMBOL(team_options_register);
 353
 354 void team_options_unregister(struct team *team,
 355                              const struct team_option *option,
 356                              size_t option_count)
 357 {
 358         __team_options_mark_removed(team, option, option_count);
 359         __team_options_change_check(team);
 360         __team_options_unregister(team, option, option_count);
 361 }
 362 EXPORT_SYMBOL(team_options_unregister);
 363
 364 static int team_option_get(struct team *team,
 365                            struct team_option_inst *opt_inst,
 366                            struct team_gsetter_ctx *ctx)
 367 {
 368         if (!opt_inst->option->getter)
 369                 return -EOPNOTSUPP;
 370         return opt_inst->option->getter(team, ctx);
 371 }
 372
 373 static int team_option_set(struct team *team,
 374                            struct team_option_inst *opt_inst,
 375                            struct team_gsetter_ctx *ctx)
 376 {
 377         if (!opt_inst->option->setter)
 378                 return -EOPNOTSUPP;
 379         return opt_inst->option->setter(team, ctx);
 380 }
 381
 382 void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info)
 383 {
 384         struct team_option_inst *opt_inst;
 385
 386         opt_inst = container_of(opt_inst_info, struct team_option_inst, info);
 387         opt_inst->changed = true;
 388 }
 389 EXPORT_SYMBOL(team_option_inst_set_change);
 390
 391 void team_options_change_check(struct team *team)
 392 {
 393         __team_options_change_check(team);
 394 }
 395 EXPORT_SYMBOL(team_options_change_check);
 396
 397
 398 /****************
 399  * Mode handling
 400  ****************/
 401
 402 static LIST_HEAD(mode_list);
 403 static DEFINE_SPINLOCK(mode_list_lock);
 404
 405 struct team_mode_item {
 406         struct list_head list;
 407         const struct team_mode *mode;
 408 };
 409
 410 static struct team_mode_item *__find_mode(const char *kind)
 411 {
 412         struct team_mode_item *mitem;
 413
 414         list_for_each_entry(mitem, &mode_list, list) {
 415                 if (strcmp(mitem->mode->kind, kind) == 0)
 416                         return mitem;
 417         }
 418         return NULL;
 419 }
 420
 421 static bool is_good_mode_name(const char *name)
 422 {
 423         while (*name != '\0') {
 424                 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
 425                         return false;
 426                 name++;
 427         }
 428         return true;
 429 }
 430
 431 int team_mode_register(const struct team_mode *mode)
 432 {
 433         int err = 0;
 434         struct team_mode_item *mitem;
 435
 436         if (!is_good_mode_name(mode->kind) ||
 437             mode->priv_size > TEAM_MODE_PRIV_SIZE)
 438                 return -EINVAL;
 439
 440         mitem = kmalloc(sizeof(*mitem), GFP_KERNEL);
 441         if (!mitem)
 442                 return -ENOMEM;
 443
 444         spin_lock(&mode_list_lock);
 445         if (__find_mode(mode->kind)) {
 446                 err = -EEXIST;
 447                 kfree(mitem);
 448                 goto unlock;
 449         }
 450         mitem->mode = mode;
 451         list_add_tail(&mitem->list, &mode_list);
 452 unlock:
 453         spin_unlock(&mode_list_lock);
 454         return err;
 455 }
 456 EXPORT_SYMBOL(team_mode_register);
 457
 458 void team_mode_unregister(const struct team_mode *mode)
 459 {
 460         struct team_mode_item *mitem;
 461
 462         spin_lock(&mode_list_lock);
 463         mitem = __find_mode(mode->kind);
 464         if (mitem) {
 465                 list_del_init(&mitem->list);
 466                 kfree(mitem);
 467         }
 468         spin_unlock(&mode_list_lock);
 469 }
 470 EXPORT_SYMBOL(team_mode_unregister);
 471
 472 static const struct team_mode *team_mode_get(const char *kind)
 473 {
 474         struct team_mode_item *mitem;
 475         const struct team_mode *mode = NULL;
 476
 477         spin_lock(&mode_list_lock);
 478         mitem = __find_mode(kind);
 479         if (!mitem) {
 480                 spin_unlock(&mode_list_lock);
 481                 request_module("team-mode-%s", kind);
 482                 spin_lock(&mode_list_lock);
 483                 mitem = __find_mode(kind);
 484         }
 485         if (mitem) {
 486                 mode = mitem->mode;
 487                 if (!try_module_get(mode->owner))
 488                         mode = NULL;
 489         }
 490
 491         spin_unlock(&mode_list_lock);
 492         return mode;
 493 }
 494
 495 static void team_mode_put(const struct team_mode *mode)
 496 {
 497         module_put(mode->owner);
 498 }
 499
 500 static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
 501 {
 502         dev_kfree_skb_any(skb);
 503         return false;
 504 }
 505
 506 static rx_handler_result_t team_dummy_receive(struct team *team,
 507                                               struct team_port *port,
 508                                               struct sk_buff *skb)
 509 {
 510         return RX_HANDLER_ANOTHER;
 511 }
 512
 513 static const struct team_mode __team_no_mode = {
 514         .kind           = "*NOMODE*",
 515 };
 516
 517 static bool team_is_mode_set(struct team *team)
 518 {
 519         return team->mode != &__team_no_mode;
 520 }
 521
 522 static void team_set_no_mode(struct team *team)
 523 {
 524         team->user_carrier_enabled = false;
 525         team->mode = &__team_no_mode;
 526 }
 527
 528 static void team_adjust_ops(struct team *team)
 529 {
 530         /*
 531          * To avoid checks in rx/tx skb paths, ensure here that non-null and
 532          * correct ops are always set.
 533          */
 534
 535         if (!team->en_port_count || !team_is_mode_set(team) ||
 536             !team->mode->ops->transmit)
 537                 team->ops.transmit = team_dummy_transmit;
 538         else
 539                 team->ops.transmit = team->mode->ops->transmit;
 540
 541         if (!team->en_port_count || !team_is_mode_set(team) ||
 542             !team->mode->ops->receive)
 543                 team->ops.receive = team_dummy_receive;
 544         else
 545                 team->ops.receive = team->mode->ops->receive;
 546 }
 547
 548 /*
 549  * We can benefit from the fact that it's ensured no port is present
 550  * at the time of mode change. Therefore no packets are in fly so there's no
 551  * need to set mode operations in any special way.
 552  */
 553 static int __team_change_mode(struct team *team,
 554                               const struct team_mode *new_mode)
 555 {
 556         /* Check if mode was previously set and do cleanup if so */
 557         if (team_is_mode_set(team)) {
 558                 void (*exit_op)(struct team *team) = team->ops.exit;
 559
 560                 /* Clear ops area so no callback is called any longer */
 561                 memset(&team->ops, 0, sizeof(struct team_mode_ops));
 562                 team_adjust_ops(team);
 563
 564                 if (exit_op)
 565                         exit_op(team);
 566                 team_mode_put(team->mode);
 567                 team_set_no_mode(team);
 568                 /* zero private data area */
 569                 memset(&team->mode_priv, 0,
 570                        sizeof(struct team) - offsetof(struct team, mode_priv));
 571         }
 572
 573         if (!new_mode)
 574                 return 0;
 575
 576         if (new_mode->ops->init) {
 577                 int err;
 578
 579                 err = new_mode->ops->init(team);
 580                 if (err)
 581                         return err;
 582         }
 583
 584         team->mode = new_mode;
 585         memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
 586         team_adjust_ops(team);
 587
 588         return 0;
 589 }
 590
 591 static int team_change_mode(struct team *team, const char *kind)
 592 {
 593         const struct team_mode *new_mode;
 594         struct net_device *dev = team->dev;
 595         int err;
 596
 597         if (!list_empty(&team->port_list)) {
 598                 netdev_err(dev, "No ports can be present during mode change\n");
 599                 return -EBUSY;
 600         }
 601
 602         if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) {
 603                 netdev_err(dev, "Unable to change to the same mode the team is in\n");
 604                 return -EINVAL;
 605         }
 606
 607         new_mode = team_mode_get(kind);
 608         if (!new_mode) {
 609                 netdev_err(dev, "Mode \"%s\" not found\n", kind);
 610                 return -EINVAL;
 611         }
 612
 613         err = __team_change_mode(team, new_mode);
 614         if (err) {
 615                 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
 616                 team_mode_put(new_mode);
 617                 return err;
 618         }
 619
 620         netdev_info(dev, "Mode changed to \"%s\"\n", kind);
 621         return 0;
 622 }
 623
 624
 625 /*********************
 626  * Peers notification
 627  *********************/
 628
 629 static void team_notify_peers_work(struct work_struct *work)
 630 {
 631         struct team *team;
 632         int val;
 633
 634         team = container_of(work, struct team, notify_peers.dw.work);
 635
 636         if (!rtnl_trylock()) {
 637                 schedule_delayed_work(&team->notify_peers.dw, 0);
 638                 return;
 639         }
 640         val = atomic_dec_if_positive(&team->notify_peers.count_pending);
 641         if (val < 0) {
 642                 rtnl_unlock();
 643                 return;
 644         }
 645         call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, team->dev);
 646         rtnl_unlock();
 647         if (val)
 648                 schedule_delayed_work(&team->notify_peers.dw,
 649                                       msecs_to_jiffies(team->notify_peers.interval));
 650 }
 651
 652 static void team_notify_peers(struct team *team)
 653 {
 654         if (!team->notify_peers.count || !netif_running(team->dev))
 655                 return;
 656         atomic_add(team->notify_peers.count, &team->notify_peers.count_pending);
 657         schedule_delayed_work(&team->notify_peers.dw, 0);
 658 }
 659
 660 static void team_notify_peers_init(struct team *team)
 661 {
 662         INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work);
 663 }
 664
 665 static void team_notify_peers_fini(struct team *team)
 666 {
 667         cancel_delayed_work_sync(&team->notify_peers.dw);
 668 }
 669
 670
 671 /*******************************
 672  * Send multicast group rejoins
 673  *******************************/
 674
 675 static void team_mcast_rejoin_work(struct work_struct *work)
 676 {
 677         struct team *team;
 678         int val;
 679
 680         team = container_of(work, struct team, mcast_rejoin.dw.work);
 681
 682         if (!rtnl_trylock()) {
 683                 schedule_delayed_work(&team->mcast_rejoin.dw, 0);
 684                 return;
 685         }
 686         val = atomic_dec_if_positive(&team->mcast_rejoin.count_pending);
 687         if (val < 0) {
 688                 rtnl_unlock();
 689                 return;
 690         }
 691         call_netdevice_notifiers(NETDEV_RESEND_IGMP, team->dev);
 692         rtnl_unlock();
 693         if (val)
 694                 schedule_delayed_work(&team->mcast_rejoin.dw,
 695                                       msecs_to_jiffies(team->mcast_rejoin.interval));
 696 }
 697
 698 static void team_mcast_rejoin(struct team *team)
 699 {
 700         if (!team->mcast_rejoin.count || !netif_running(team->dev))
 701                 return;
 702         atomic_add(team->mcast_rejoin.count, &team->mcast_rejoin.count_pending);
 703         schedule_delayed_work(&team->mcast_rejoin.dw, 0);
 704 }
 705
 706 static void team_mcast_rejoin_init(struct team *team)
 707 {
 708         INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work);
 709 }
 710
 711 static void team_mcast_rejoin_fini(struct team *team)
 712 {
 713         cancel_delayed_work_sync(&team->mcast_rejoin.dw);
 714 }
 715
 716
 717 /************************
 718  * Rx path frame handler
 719  ************************/
 720
 721 /* note: already called with rcu_read_lock */
 722 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
 723 {
 724         struct sk_buff *skb = *pskb;
 725         struct team_port *port;
 726         struct team *team;
 727         rx_handler_result_t res;
 728
 729         skb = skb_share_check(skb, GFP_ATOMIC);
 730         if (!skb)
 731                 return RX_HANDLER_CONSUMED;
 732
 733         *pskb = skb;
 734
 735         port = team_port_get_rcu(skb->dev);
 736         team = port->team;
 737         if (!team_port_enabled(port)) {
 738                 /* allow exact match delivery for disabled ports */
 739                 res = RX_HANDLER_EXACT;
 740         } else {
 741                 res = team->ops.receive(team, port, skb);
 742         }
 743         if (res == RX_HANDLER_ANOTHER) {
 744                 struct team_pcpu_stats *pcpu_stats;
 745
 746                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
 747                 u64_stats_update_begin(&pcpu_stats->syncp);
 748                 pcpu_stats->rx_packets++;
 749                 pcpu_stats->rx_bytes += skb->len;
 750                 if (skb->pkt_type == PACKET_MULTICAST)
 751                         pcpu_stats->rx_multicast++;
 752                 u64_stats_update_end(&pcpu_stats->syncp);
 753
 754                 skb->dev = team->dev;
 755         } else if (res == RX_HANDLER_EXACT) {
 756                 this_cpu_inc(team->pcpu_stats->rx_nohandler);
 757         } else {
 758                 this_cpu_inc(team->pcpu_stats->rx_dropped);
 759         }
 760
 761         return res;
 762 }
 763
 764
 765 /*************************************
 766  * Multiqueue Tx port select override
 767  *************************************/
 768
 769 static int team_queue_override_init(struct team *team)
 770 {
 771         struct list_head *listarr;
 772         unsigned int queue_cnt = team->dev->num_tx_queues - 1;
 773         unsigned int i;
 774
 775         if (!queue_cnt)
 776                 return 0;
 777         listarr = kmalloc_array(queue_cnt, sizeof(struct list_head),
 778                                 GFP_KERNEL);
 779         if (!listarr)
 780                 return -ENOMEM;
 781         team->qom_lists = listarr;
 782         for (i = 0; i < queue_cnt; i++)
 783                 INIT_LIST_HEAD(listarr++);
 784         return 0;
 785 }
 786
 787 static void team_queue_override_fini(struct team *team)
 788 {
 789         kfree(team->qom_lists);
 790 }
 791
 792 static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
 793 {
 794         return &team->qom_lists[queue_id - 1];
 795 }
 796
 797 /*
 798  * note: already called with rcu_read_lock
 799  */
 800 static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
 801 {
 802         struct list_head *qom_list;
 803         struct team_port *port;
 804
 805         if (!team->queue_override_enabled || !skb->queue_mapping)
 806                 return false;
 807         qom_list = __team_get_qom_list(team, skb->queue_mapping);
 808         list_for_each_entry_rcu(port, qom_list, qom_list) {
 809                 if (!team_dev_queue_xmit(team, port, skb))
 810                         return true;
 811         }
 812         return false;
 813 }
 814
 815 static void __team_queue_override_port_del(struct team *team,
 816                                            struct team_port *port)
 817 {
 818         if (!port->queue_id)
 819                 return;
 820         list_del_rcu(&port->qom_list);
 821 }
 822
 823 static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
 824                                                       struct team_port *cur)
 825 {
 826         if (port->priority < cur->priority)
 827                 return true;
 828         if (port->priority > cur->priority)
 829                 return false;
 830         if (port->index < cur->index)
 831                 return true;
 832         return false;
 833 }
 834
 835 static void __team_queue_override_port_add(struct team *team,
 836                                            struct team_port *port)
 837 {
 838         struct team_port *cur;
 839         struct list_head *qom_list;
 840         struct list_head *node;
 841
 842         if (!port->queue_id)
 843                 return;
 844         qom_list = __team_get_qom_list(team, port->queue_id);
 845         node = qom_list;
 846         list_for_each_entry(cur, qom_list, qom_list) {
 847                 if (team_queue_override_port_has_gt_prio_than(port, cur))
 848                         break;
 849                 node = &cur->qom_list;
 850         }
 851         list_add_tail_rcu(&port->qom_list, node);
 852 }
 853
 854 static void __team_queue_override_enabled_check(struct team *team)
 855 {
 856         struct team_port *port;
 857         bool enabled = false;
 858
 859         list_for_each_entry(port, &team->port_list, list) {
 860                 if (port->queue_id) {
 861                         enabled = true;
 862                         break;
 863                 }
 864         }
 865         if (enabled == team->queue_override_enabled)
 866                 return;
 867         netdev_dbg(team->dev, "%s queue override\n",
 868                    enabled ? "Enabling" : "Disabling");
 869         team->queue_override_enabled = enabled;
 870 }
 871
 872 static void team_queue_override_port_prio_changed(struct team *team,
 873                                                   struct team_port *port)
 874 {
 875         if (!port->queue_id || team_port_enabled(port))
 876                 return;
 877         __team_queue_override_port_del(team, port);
 878         __team_queue_override_port_add(team, port);
 879         __team_queue_override_enabled_check(team);
 880 }
 881
 882 static void team_queue_override_port_change_queue_id(struct team *team,
 883                                                      struct team_port *port,
 884                                                      u16 new_queue_id)
 885 {
 886         if (team_port_enabled(port)) {
 887                 __team_queue_override_port_del(team, port);
 888                 port->queue_id = new_queue_id;
 889                 __team_queue_override_port_add(team, port);
 890                 __team_queue_override_enabled_check(team);
 891         } else {
 892                 port->queue_id = new_queue_id;
 893         }
 894 }
 895
 896 static void team_queue_override_port_add(struct team *team,
 897                                          struct team_port *port)
 898 {
 899         __team_queue_override_port_add(team, port);
 900         __team_queue_override_enabled_check(team);
 901 }
 902
 903 static void team_queue_override_port_del(struct team *team,
 904                                          struct team_port *port)
 905 {
 906         __team_queue_override_port_del(team, port);
 907         __team_queue_override_enabled_check(team);
 908 }
 909
 910
 911 /****************
 912  * Port handling
 913  ****************/
 914
 915 static bool team_port_find(const struct team *team,
 916                            const struct team_port *port)
 917 {
 918         struct team_port *cur;
 919
 920         list_for_each_entry(cur, &team->port_list, list)
 921                 if (cur == port)
 922                         return true;
 923         return false;
 924 }
 925
 926 /*
 927  * Enable/disable port by adding to enabled port hashlist and setting
 928  * port->index (Might be racy so reader could see incorrect ifindex when
 929  * processing a flying packet, but that is not a problem). Write guarded
 930  * by team->lock.
 931  */
 932 static void team_port_enable(struct team *team,
 933                              struct team_port *port)
 934 {
 935         if (team_port_enabled(port))
 936                 return;
 937         port->index = team->en_port_count++;
 938         hlist_add_head_rcu(&port->hlist,
 939                            team_port_index_hash(team, port->index));
 940         team_adjust_ops(team);
 941         team_queue_override_port_add(team, port);
 942         if (team->ops.port_enabled)
 943                 team->ops.port_enabled(team, port);
 944         team_notify_peers(team);
 945         team_mcast_rejoin(team);
 946         team_lower_state_changed(port);
 947 }
 948
 949 static void __reconstruct_port_hlist(struct team *team, int rm_index)
 950 {
 951         int i;
 952         struct team_port *port;
 953
 954         for (i = rm_index + 1; i < team->en_port_count; i++) {
 955                 port = team_get_port_by_index(team, i);
 956                 hlist_del_rcu(&port->hlist);
 957                 port->index--;
 958                 hlist_add_head_rcu(&port->hlist,
 959                                    team_port_index_hash(team, port->index));
 960         }
 961 }
 962
 963 static void team_port_disable(struct team *team,
 964                               struct team_port *port)
 965 {
 966         if (!team_port_enabled(port))
 967                 return;
 968         if (team->ops.port_disabled)
 969                 team->ops.port_disabled(team, port);
 970         hlist_del_rcu(&port->hlist);
 971         __reconstruct_port_hlist(team, port->index);
 972         port->index = -1;
 973         team->en_port_count--;
 974         team_queue_override_port_del(team, port);
 975         team_adjust_ops(team);
 976         team_lower_state_changed(port);
 977 }
 978
 979 #define TEAM_VLAN_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
 980                             NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
 981                             NETIF_F_HIGHDMA | NETIF_F_LRO)
 982
 983 #define TEAM_ENC_FEATURES       (NETIF_F_HW_CSUM | NETIF_F_SG | \
 984                                  NETIF_F_RXCSUM | NETIF_F_ALL_TSO)
 985
 986 static void __team_compute_features(struct team *team)
 987 {
 988         struct team_port *port;
 989         netdev_features_t vlan_features = TEAM_VLAN_FEATURES &
 990                                           NETIF_F_ALL_FOR_ALL;
 991         netdev_features_t enc_features  = TEAM_ENC_FEATURES;
 992         unsigned short max_hard_header_len = ETH_HLEN;
 993         unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE |
 994                                         IFF_XMIT_DST_RELEASE_PERM;
 995
 996         list_for_each_entry(port, &team->port_list, list) {
 997                 vlan_features = netdev_increment_features(vlan_features,
 998                                         port->dev->vlan_features,
 999                                         TEAM_VLAN_FEATURES);
1000                 enc_features =
1001                         netdev_increment_features(enc_features,
1002                                                   port->dev->hw_enc_features,
1003                                                   TEAM_ENC_FEATURES);
1004
1005
1006                 dst_release_flag &= port->dev->priv_flags;
1007                 if (port->dev->hard_header_len > max_hard_header_len)
1008                         max_hard_header_len = port->dev->hard_header_len;
1009         }
1010
1011         team->dev->vlan_features = vlan_features;
1012         team->dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL |
1013                                      NETIF_F_GSO_UDP_L4;
1014         team->dev->hard_header_len = max_hard_header_len;
1015
1016         team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
1017         if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
1018                 team->dev->priv_flags |= IFF_XMIT_DST_RELEASE;
1019 }
1020
1021 static void team_compute_features(struct team *team)
1022 {
1023         mutex_lock(&team->lock);
1024         __team_compute_features(team);
1025         mutex_unlock(&team->lock);
1026         netdev_change_features(team->dev);
1027 }
1028
1029 static int team_port_enter(struct team *team, struct team_port *port)
1030 {
1031         int err = 0;
1032
1033         dev_hold(team->dev);
1034         if (team->ops.port_enter) {
1035                 err = team->ops.port_enter(team, port);
1036                 if (err) {
1037                         netdev_err(team->dev, "Device %s failed to enter team mode\n",
1038                                    port->dev->name);
1039                         goto err_port_enter;
1040                 }
1041         }
1042
1043         return 0;
1044
1045 err_port_enter:
1046         dev_put(team->dev);
1047
1048         return err;
1049 }
1050
1051 static void team_port_leave(struct team *team, struct team_port *port)
1052 {
1053         if (team->ops.port_leave)
1054                 team->ops.port_leave(team, port);
1055         dev_put(team->dev);
1056 }
1057
1058 #ifdef CONFIG_NET_POLL_CONTROLLER
1059 static int __team_port_enable_netpoll(struct team_port *port)
1060 {
1061         struct netpoll *np;
1062         int err;
1063
1064         np = kzalloc(sizeof(*np), GFP_KERNEL);
1065         if (!np)
1066                 return -ENOMEM;
1067
1068         err = __netpoll_setup(np, port->dev);
1069         if (err) {
1070                 kfree(np);
1071                 return err;
1072         }
1073         port->np = np;
1074         return err;
1075 }
1076
1077 static int team_port_enable_netpoll(struct team_port *port)
1078 {
1079         if (!port->team->dev->npinfo)
1080                 return 0;
1081
1082         return __team_port_enable_netpoll(port);
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         __netpoll_free(np);
1094 }
1095 #else
1096 static int team_port_enable_netpoll(struct team_port *port)
1097 {
1098         return 0;
1099 }
1100 static void team_port_disable_netpoll(struct team_port *port)
1101 {
1102 }
1103 #endif
1104
1105 static int team_upper_dev_link(struct team *team, struct team_port *port,
1106                                struct netlink_ext_ack *extack)
1107 {
1108         struct netdev_lag_upper_info lag_upper_info;
1109         int err;
1110
1111         lag_upper_info.tx_type = team->mode->lag_tx_type;
1112         lag_upper_info.hash_type = NETDEV_LAG_HASH_UNKNOWN;
1113         err = netdev_master_upper_dev_link(port->dev, team->dev, NULL,
1114                                            &lag_upper_info, extack);
1115         if (err)
1116                 return err;
1117         port->dev->priv_flags |= IFF_TEAM_PORT;
1118         return 0;
1119 }
1120
1121 static void team_upper_dev_unlink(struct team *team, struct team_port *port)
1122 {
1123         netdev_upper_dev_unlink(port->dev, team->dev);
1124         port->dev->priv_flags &= ~IFF_TEAM_PORT;
1125 }
1126
1127 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1128 static int team_dev_type_check_change(struct net_device *dev,
1129                                       struct net_device *port_dev);
1130
1131 static int team_port_add(struct team *team, struct net_device *port_dev,
1132                          struct netlink_ext_ack *extack)
1133 {
1134         struct net_device *dev = team->dev;
1135         struct team_port *port;
1136         char *portname = port_dev->name;
1137         int err;
1138
1139         if (port_dev->flags & IFF_LOOPBACK) {
1140                 NL_SET_ERR_MSG(extack, "Loopback device can't be added as a team port");
1141                 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1142                            portname);
1143                 return -EINVAL;
1144         }
1145
1146         if (team_port_exists(port_dev)) {
1147                 NL_SET_ERR_MSG(extack, "Device is already a port of a team device");
1148                 netdev_err(dev, "Device %s is already a port "
1149                                 "of a team device\n", portname);
1150                 return -EBUSY;
1151         }
1152
1153         if (dev == port_dev) {
1154                 NL_SET_ERR_MSG(extack, "Cannot enslave team device to itself");
1155                 netdev_err(dev, "Cannot enslave team device to itself\n");
1156                 return -EINVAL;
1157         }
1158
1159         if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1160             vlan_uses_dev(dev)) {
1161                 NL_SET_ERR_MSG(extack, "Device is VLAN challenged and team device has VLAN set up");
1162                 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1163                            portname);
1164                 return -EPERM;
1165         }
1166
1167         err = team_dev_type_check_change(dev, port_dev);
1168         if (err)
1169                 return err;
1170
1171         if (port_dev->flags & IFF_UP) {
1172                 NL_SET_ERR_MSG(extack, "Device is up. Set it down before adding it as a team port");
1173                 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1174                            portname);
1175                 return -EBUSY;
1176         }
1177
1178         port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1179                        GFP_KERNEL);
1180         if (!port)
1181                 return -ENOMEM;
1182
1183         port->dev = port_dev;
1184         port->team = team;
1185         INIT_LIST_HEAD(&port->qom_list);
1186
1187         port->orig.mtu = port_dev->mtu;
1188         err = dev_set_mtu(port_dev, dev->mtu);
1189         if (err) {
1190                 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1191                 goto err_set_mtu;
1192         }
1193
1194         memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1195
1196         err = team_port_enter(team, port);
1197         if (err) {
1198                 netdev_err(dev, "Device %s failed to enter team mode\n",
1199                            portname);
1200                 goto err_port_enter;
1201         }
1202
1203         err = dev_open(port_dev, extack);
1204         if (err) {
1205                 netdev_dbg(dev, "Device %s opening failed\n",
1206                            portname);
1207                 goto err_dev_open;
1208         }
1209
1210         err = vlan_vids_add_by_dev(port_dev, dev);
1211         if (err) {
1212                 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1213                                 portname);
1214                 goto err_vids_add;
1215         }
1216
1217         err = team_port_enable_netpoll(port);
1218         if (err) {
1219                 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1220                            portname);
1221                 goto err_enable_netpoll;
1222         }
1223
1224         if (!(dev->features & NETIF_F_LRO))
1225                 dev_disable_lro(port_dev);
1226
1227         err = netdev_rx_handler_register(port_dev, team_handle_frame,
1228                                          port);
1229         if (err) {
1230                 netdev_err(dev, "Device %s failed to register rx_handler\n",
1231                            portname);
1232                 goto err_handler_register;
1233         }
1234
1235         err = team_upper_dev_link(team, port, extack);
1236         if (err) {
1237                 netdev_err(dev, "Device %s failed to set upper link\n",
1238                            portname);
1239                 goto err_set_upper_link;
1240         }
1241
1242         err = __team_option_inst_add_port(team, port);
1243         if (err) {
1244                 netdev_err(dev, "Device %s failed to add per-port options\n",
1245                            portname);
1246                 goto err_option_port_add;
1247         }
1248
1249         netif_addr_lock_bh(dev);
1250         dev_uc_sync_multiple(port_dev, dev);
1251         dev_mc_sync_multiple(port_dev, dev);
1252         netif_addr_unlock_bh(dev);
1253
1254         port->index = -1;
1255         list_add_tail_rcu(&port->list, &team->port_list);
1256         team_port_enable(team, port);
1257         __team_compute_features(team);
1258         __team_port_change_port_added(port, !!netif_oper_up(port_dev));
1259         __team_options_change_check(team);
1260
1261         netdev_info(dev, "Port device %s added\n", portname);
1262
1263         return 0;
1264
1265 err_option_port_add:
1266         team_upper_dev_unlink(team, port);
1267
1268 err_set_upper_link:
1269         netdev_rx_handler_unregister(port_dev);
1270
1271 err_handler_register:
1272         team_port_disable_netpoll(port);
1273
1274 err_enable_netpoll:
1275         vlan_vids_del_by_dev(port_dev, dev);
1276
1277 err_vids_add:
1278         dev_close(port_dev);
1279
1280 err_dev_open:
1281         team_port_leave(team, port);
1282         team_port_set_orig_dev_addr(port);
1283
1284 err_port_enter:
1285         dev_set_mtu(port_dev, port->orig.mtu);
1286
1287 err_set_mtu:
1288         kfree(port);
1289
1290         return err;
1291 }
1292
1293 static void __team_port_change_port_removed(struct team_port *port);
1294
1295 static int team_port_del(struct team *team, struct net_device *port_dev)
1296 {
1297         struct net_device *dev = team->dev;
1298         struct team_port *port;
1299         char *portname = port_dev->name;
1300
1301         port = team_port_get_rtnl(port_dev);
1302         if (!port || !team_port_find(team, port)) {
1303                 netdev_err(dev, "Device %s does not act as a port of this team\n",
1304                            portname);
1305                 return -ENOENT;
1306         }
1307
1308         team_port_disable(team, port);
1309         list_del_rcu(&port->list);
1310         team_upper_dev_unlink(team, port);
1311         netdev_rx_handler_unregister(port_dev);
1312         team_port_disable_netpoll(port);
1313         vlan_vids_del_by_dev(port_dev, dev);
1314         dev_uc_unsync(port_dev, dev);
1315         dev_mc_unsync(port_dev, dev);
1316         dev_close(port_dev);
1317         team_port_leave(team, port);
1318
1319         __team_option_inst_mark_removed_port(team, port);
1320         __team_options_change_check(team);
1321         __team_option_inst_del_port(team, port);
1322         __team_port_change_port_removed(port);
1323
1324         team_port_set_orig_dev_addr(port);
1325         dev_set_mtu(port_dev, port->orig.mtu);
1326         kfree_rcu(port, rcu);
1327         netdev_info(dev, "Port device %s removed\n", portname);
1328         __team_compute_features(team);
1329
1330         return 0;
1331 }
1332
1333
1334 /*****************
1335  * Net device ops
1336  *****************/
1337
1338 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1339 {
1340         ctx->data.str_val = team->mode->kind;
1341         return 0;
1342 }
1343
1344 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1345 {
1346         return team_change_mode(team, ctx->data.str_val);
1347 }
1348
1349 static int team_notify_peers_count_get(struct team *team,
1350                                        struct team_gsetter_ctx *ctx)
1351 {
1352         ctx->data.u32_val = team->notify_peers.count;
1353         return 0;
1354 }
1355
1356 static int team_notify_peers_count_set(struct team *team,
1357                                        struct team_gsetter_ctx *ctx)
1358 {
1359         team->notify_peers.count = ctx->data.u32_val;
1360         return 0;
1361 }
1362
1363 static int team_notify_peers_interval_get(struct team *team,
1364                                           struct team_gsetter_ctx *ctx)
1365 {
1366         ctx->data.u32_val = team->notify_peers.interval;
1367         return 0;
1368 }
1369
1370 static int team_notify_peers_interval_set(struct team *team,
1371                                           struct team_gsetter_ctx *ctx)
1372 {
1373         team->notify_peers.interval = ctx->data.u32_val;
1374         return 0;
1375 }
1376
1377 static int team_mcast_rejoin_count_get(struct team *team,
1378                                        struct team_gsetter_ctx *ctx)
1379 {
1380         ctx->data.u32_val = team->mcast_rejoin.count;
1381         return 0;
1382 }
1383
1384 static int team_mcast_rejoin_count_set(struct team *team,
1385                                        struct team_gsetter_ctx *ctx)
1386 {
1387         team->mcast_rejoin.count = ctx->data.u32_val;
1388         return 0;
1389 }
1390
1391 static int team_mcast_rejoin_interval_get(struct team *team,
1392                                           struct team_gsetter_ctx *ctx)
1393 {
1394         ctx->data.u32_val = team->mcast_rejoin.interval;
1395         return 0;
1396 }
1397
1398 static int team_mcast_rejoin_interval_set(struct team *team,
1399                                           struct team_gsetter_ctx *ctx)
1400 {
1401         team->mcast_rejoin.interval = ctx->data.u32_val;
1402         return 0;
1403 }
1404
1405 static int team_port_en_option_get(struct team *team,
1406                                    struct team_gsetter_ctx *ctx)
1407 {
1408         struct team_port *port = ctx->info->port;
1409
1410         ctx->data.bool_val = team_port_enabled(port);
1411         return 0;
1412 }
1413
1414 static int team_port_en_option_set(struct team *team,
1415                                    struct team_gsetter_ctx *ctx)
1416 {
1417         struct team_port *port = ctx->info->port;
1418
1419         if (ctx->data.bool_val)
1420                 team_port_enable(team, port);
1421         else
1422                 team_port_disable(team, port);
1423         return 0;
1424 }
1425
1426 static int team_user_linkup_option_get(struct team *team,
1427                                        struct team_gsetter_ctx *ctx)
1428 {
1429         struct team_port *port = ctx->info->port;
1430
1431         ctx->data.bool_val = port->user.linkup;
1432         return 0;
1433 }
1434
1435 static void __team_carrier_check(struct team *team);
1436
1437 static int team_user_linkup_option_set(struct team *team,
1438                                        struct team_gsetter_ctx *ctx)
1439 {
1440         struct team_port *port = ctx->info->port;
1441
1442         port->user.linkup = ctx->data.bool_val;
1443         team_refresh_port_linkup(port);
1444         __team_carrier_check(port->team);
1445         return 0;
1446 }
1447
1448 static int team_user_linkup_en_option_get(struct team *team,
1449                                           struct team_gsetter_ctx *ctx)
1450 {
1451         struct team_port *port = ctx->info->port;
1452
1453         ctx->data.bool_val = port->user.linkup_enabled;
1454         return 0;
1455 }
1456
1457 static int team_user_linkup_en_option_set(struct team *team,
1458                                           struct team_gsetter_ctx *ctx)
1459 {
1460         struct team_port *port = ctx->info->port;
1461
1462         port->user.linkup_enabled = ctx->data.bool_val;
1463         team_refresh_port_linkup(port);
1464         __team_carrier_check(port->team);
1465         return 0;
1466 }
1467
1468 static int team_priority_option_get(struct team *team,
1469                                     struct team_gsetter_ctx *ctx)
1470 {
1471         struct team_port *port = ctx->info->port;
1472
1473         ctx->data.s32_val = port->priority;
1474         return 0;
1475 }
1476
1477 static int team_priority_option_set(struct team *team,
1478                                     struct team_gsetter_ctx *ctx)
1479 {
1480         struct team_port *port = ctx->info->port;
1481         s32 priority = ctx->data.s32_val;
1482
1483         if (port->priority == priority)
1484                 return 0;
1485         port->priority = priority;
1486         team_queue_override_port_prio_changed(team, port);
1487         return 0;
1488 }
1489
1490 static int team_queue_id_option_get(struct team *team,
1491                                     struct team_gsetter_ctx *ctx)
1492 {
1493         struct team_port *port = ctx->info->port;
1494
1495         ctx->data.u32_val = port->queue_id;
1496         return 0;
1497 }
1498
1499 static int team_queue_id_option_set(struct team *team,
1500                                     struct team_gsetter_ctx *ctx)
1501 {
1502         struct team_port *port = ctx->info->port;
1503         u16 new_queue_id = ctx->data.u32_val;
1504
1505         if (port->queue_id == new_queue_id)
1506                 return 0;
1507         if (new_queue_id >= team->dev->real_num_tx_queues)
1508                 return -EINVAL;
1509         team_queue_override_port_change_queue_id(team, port, new_queue_id);
1510         return 0;
1511 }
1512
1513 static const struct team_option team_options[] = {
1514         {
1515                 .name = "mode",
1516                 .type = TEAM_OPTION_TYPE_STRING,
1517                 .getter = team_mode_option_get,
1518                 .setter = team_mode_option_set,
1519         },
1520         {
1521                 .name = "notify_peers_count",
1522                 .type = TEAM_OPTION_TYPE_U32,
1523                 .getter = team_notify_peers_count_get,
1524                 .setter = team_notify_peers_count_set,
1525         },
1526         {
1527                 .name = "notify_peers_interval",
1528                 .type = TEAM_OPTION_TYPE_U32,
1529                 .getter = team_notify_peers_interval_get,
1530                 .setter = team_notify_peers_interval_set,
1531         },
1532         {
1533                 .name = "mcast_rejoin_count",
1534                 .type = TEAM_OPTION_TYPE_U32,
1535                 .getter = team_mcast_rejoin_count_get,
1536                 .setter = team_mcast_rejoin_count_set,
1537         },
1538         {
1539                 .name = "mcast_rejoin_interval",
1540                 .type = TEAM_OPTION_TYPE_U32,
1541                 .getter = team_mcast_rejoin_interval_get,
1542                 .setter = team_mcast_rejoin_interval_set,
1543         },
1544         {
1545                 .name = "enabled",
1546                 .type = TEAM_OPTION_TYPE_BOOL,
1547                 .per_port = true,
1548                 .getter = team_port_en_option_get,
1549                 .setter = team_port_en_option_set,
1550         },
1551         {
1552                 .name = "user_linkup",
1553                 .type = TEAM_OPTION_TYPE_BOOL,
1554                 .per_port = true,
1555                 .getter = team_user_linkup_option_get,
1556                 .setter = team_user_linkup_option_set,
1557         },
1558         {
1559                 .name = "user_linkup_enabled",
1560                 .type = TEAM_OPTION_TYPE_BOOL,
1561                 .per_port = true,
1562                 .getter = team_user_linkup_en_option_get,
1563                 .setter = team_user_linkup_en_option_set,
1564         },
1565         {
1566                 .name = "priority",
1567                 .type = TEAM_OPTION_TYPE_S32,
1568                 .per_port = true,
1569                 .getter = team_priority_option_get,
1570                 .setter = team_priority_option_set,
1571         },
1572         {
1573                 .name = "queue_id",
1574                 .type = TEAM_OPTION_TYPE_U32,
1575                 .per_port = true,
1576                 .getter = team_queue_id_option_get,
1577                 .setter = team_queue_id_option_set,
1578         },
1579 };
1580
1581
1582 static int team_init(struct net_device *dev)
1583 {
1584         struct team *team = netdev_priv(dev);
1585         int i;
1586         int err;
1587
1588         team->dev = dev;
1589         mutex_init(&team->lock);
1590         team_set_no_mode(team);
1591
1592         team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1593         if (!team->pcpu_stats)
1594                 return -ENOMEM;
1595
1596         for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1597                 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1598         INIT_LIST_HEAD(&team->port_list);
1599         err = team_queue_override_init(team);
1600         if (err)
1601                 goto err_team_queue_override_init;
1602
1603         team_adjust_ops(team);
1604
1605         INIT_LIST_HEAD(&team->option_list);
1606         INIT_LIST_HEAD(&team->option_inst_list);
1607
1608         team_notify_peers_init(team);
1609         team_mcast_rejoin_init(team);
1610
1611         err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1612         if (err)
1613                 goto err_options_register;
1614         netif_carrier_off(dev);
1615
1616         netdev_lockdep_set_classes(dev);
1617
1618         return 0;
1619
1620 err_options_register:
1621         team_mcast_rejoin_fini(team);
1622         team_notify_peers_fini(team);
1623         team_queue_override_fini(team);
1624 err_team_queue_override_init:
1625         free_percpu(team->pcpu_stats);
1626
1627         return err;
1628 }
1629
1630 static void team_uninit(struct net_device *dev)
1631 {
1632         struct team *team = netdev_priv(dev);
1633         struct team_port *port;
1634         struct team_port *tmp;
1635
1636         mutex_lock(&team->lock);
1637         list_for_each_entry_safe(port, tmp, &team->port_list, list)
1638                 team_port_del(team, port->dev);
1639
1640         __team_change_mode(team, NULL); /* cleanup */
1641         __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1642         team_mcast_rejoin_fini(team);
1643         team_notify_peers_fini(team);
1644         team_queue_override_fini(team);
1645         mutex_unlock(&team->lock);
1646         netdev_change_features(dev);
1647 }
1648
1649 static void team_destructor(struct net_device *dev)
1650 {
1651         struct team *team = netdev_priv(dev);
1652
1653         free_percpu(team->pcpu_stats);
1654 }
1655
1656 static int team_open(struct net_device *dev)
1657 {
1658         return 0;
1659 }
1660
1661 static int team_close(struct net_device *dev)
1662 {
1663         return 0;
1664 }
1665
1666 /*
1667  * note: already called with rcu_read_lock
1668  */
1669 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1670 {
1671         struct team *team = netdev_priv(dev);
1672         bool tx_success;
1673         unsigned int len = skb->len;
1674
1675         tx_success = team_queue_override_transmit(team, skb);
1676         if (!tx_success)
1677                 tx_success = team->ops.transmit(team, skb);
1678         if (tx_success) {
1679                 struct team_pcpu_stats *pcpu_stats;
1680
1681                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1682                 u64_stats_update_begin(&pcpu_stats->syncp);
1683                 pcpu_stats->tx_packets++;
1684                 pcpu_stats->tx_bytes += len;
1685                 u64_stats_update_end(&pcpu_stats->syncp);
1686         } else {
1687                 this_cpu_inc(team->pcpu_stats->tx_dropped);
1688         }
1689
1690         return NETDEV_TX_OK;
1691 }
1692
1693 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1694                              struct net_device *sb_dev,
1695                              select_queue_fallback_t fallback)
1696 {
1697         /*
1698          * This helper function exists to help dev_pick_tx get the correct
1699          * destination queue.  Using a helper function skips a call to
1700          * skb_tx_hash and will put the skbs in the queue we expect on their
1701          * way down to the team driver.
1702          */
1703         u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1704
1705         /*
1706          * Save the original txq to restore before passing to the driver
1707          */
1708         qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1709
1710         if (unlikely(txq >= dev->real_num_tx_queues)) {
1711                 do {
1712                         txq -= dev->real_num_tx_queues;
1713                 } while (txq >= dev->real_num_tx_queues);
1714         }
1715         return txq;
1716 }
1717
1718 static void team_change_rx_flags(struct net_device *dev, int change)
1719 {
1720         struct team *team = netdev_priv(dev);
1721         struct team_port *port;
1722         int inc;
1723
1724         rcu_read_lock();
1725         list_for_each_entry_rcu(port, &team->port_list, list) {
1726                 if (change & IFF_PROMISC) {
1727                         inc = dev->flags & IFF_PROMISC ? 1 : -1;
1728                         dev_set_promiscuity(port->dev, inc);
1729                 }
1730                 if (change & IFF_ALLMULTI) {
1731                         inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1732                         dev_set_allmulti(port->dev, inc);
1733                 }
1734         }
1735         rcu_read_unlock();
1736 }
1737
1738 static void team_set_rx_mode(struct net_device *dev)
1739 {
1740         struct team *team = netdev_priv(dev);
1741         struct team_port *port;
1742
1743         rcu_read_lock();
1744         list_for_each_entry_rcu(port, &team->port_list, list) {
1745                 dev_uc_sync_multiple(port->dev, dev);
1746                 dev_mc_sync_multiple(port->dev, dev);
1747         }
1748         rcu_read_unlock();
1749 }
1750
1751 static int team_set_mac_address(struct net_device *dev, void *p)
1752 {
1753         struct sockaddr *addr = p;
1754         struct team *team = netdev_priv(dev);
1755         struct team_port *port;
1756
1757         if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1758                 return -EADDRNOTAVAIL;
1759         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1760         mutex_lock(&team->lock);
1761         list_for_each_entry(port, &team->port_list, list)
1762                 if (team->ops.port_change_dev_addr)
1763                         team->ops.port_change_dev_addr(team, port);
1764         mutex_unlock(&team->lock);
1765         return 0;
1766 }
1767
1768 static int team_change_mtu(struct net_device *dev, int new_mtu)
1769 {
1770         struct team *team = netdev_priv(dev);
1771         struct team_port *port;
1772         int err;
1773
1774         /*
1775          * Alhough this is reader, it's guarded by team lock. It's not possible
1776          * to traverse list in reverse under rcu_read_lock
1777          */
1778         mutex_lock(&team->lock);
1779         team->port_mtu_change_allowed = true;
1780         list_for_each_entry(port, &team->port_list, list) {
1781                 err = dev_set_mtu(port->dev, new_mtu);
1782                 if (err) {
1783                         netdev_err(dev, "Device %s failed to change mtu",
1784                                    port->dev->name);
1785                         goto unwind;
1786                 }
1787         }
1788         team->port_mtu_change_allowed = false;
1789         mutex_unlock(&team->lock);
1790
1791         dev->mtu = new_mtu;
1792
1793         return 0;
1794
1795 unwind:
1796         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1797                 dev_set_mtu(port->dev, dev->mtu);
1798         team->port_mtu_change_allowed = false;
1799         mutex_unlock(&team->lock);
1800
1801         return err;
1802 }
1803
1804 static void
1805 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1806 {
1807         struct team *team = netdev_priv(dev);
1808         struct team_pcpu_stats *p;
1809         u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1810         u32 rx_dropped = 0, tx_dropped = 0, rx_nohandler = 0;
1811         unsigned int start;
1812         int i;
1813
1814         for_each_possible_cpu(i) {
1815                 p = per_cpu_ptr(team->pcpu_stats, i);
1816                 do {
1817                         start = u64_stats_fetch_begin_irq(&p->syncp);
1818                         rx_packets      = p->rx_packets;
1819                         rx_bytes        = p->rx_bytes;
1820                         rx_multicast    = p->rx_multicast;
1821                         tx_packets      = p->tx_packets;
1822                         tx_bytes        = p->tx_bytes;
1823                 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
1824
1825                 stats->rx_packets       += rx_packets;
1826                 stats->rx_bytes         += rx_bytes;
1827                 stats->multicast        += rx_multicast;
1828                 stats->tx_packets       += tx_packets;
1829                 stats->tx_bytes         += tx_bytes;
1830                 /*
1831                  * rx_dropped, tx_dropped & rx_nohandler are u32,
1832                  * updated without syncp protection.
1833                  */
1834                 rx_dropped      += p->rx_dropped;
1835                 tx_dropped      += p->tx_dropped;
1836                 rx_nohandler    += p->rx_nohandler;
1837         }
1838         stats->rx_dropped       = rx_dropped;
1839         stats->tx_dropped       = tx_dropped;
1840         stats->rx_nohandler     = rx_nohandler;
1841 }
1842
1843 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1844 {
1845         struct team *team = netdev_priv(dev);
1846         struct team_port *port;
1847         int err;
1848
1849         /*
1850          * Alhough this is reader, it's guarded by team lock. It's not possible
1851          * to traverse list in reverse under rcu_read_lock
1852          */
1853         mutex_lock(&team->lock);
1854         list_for_each_entry(port, &team->port_list, list) {
1855                 err = vlan_vid_add(port->dev, proto, vid);
1856                 if (err)
1857                         goto unwind;
1858         }
1859         mutex_unlock(&team->lock);
1860
1861         return 0;
1862
1863 unwind:
1864         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1865                 vlan_vid_del(port->dev, proto, vid);
1866         mutex_unlock(&team->lock);
1867
1868         return err;
1869 }
1870
1871 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1872 {
1873         struct team *team = netdev_priv(dev);
1874         struct team_port *port;
1875
1876         mutex_lock(&team->lock);
1877         list_for_each_entry(port, &team->port_list, list)
1878                 vlan_vid_del(port->dev, proto, vid);
1879         mutex_unlock(&team->lock);
1880
1881         return 0;
1882 }
1883
1884 #ifdef CONFIG_NET_POLL_CONTROLLER
1885 static void team_poll_controller(struct net_device *dev)
1886 {
1887 }
1888
1889 static void __team_netpoll_cleanup(struct team *team)
1890 {
1891         struct team_port *port;
1892
1893         list_for_each_entry(port, &team->port_list, list)
1894                 team_port_disable_netpoll(port);
1895 }
1896
1897 static void team_netpoll_cleanup(struct net_device *dev)
1898 {
1899         struct team *team = netdev_priv(dev);
1900
1901         mutex_lock(&team->lock);
1902         __team_netpoll_cleanup(team);
1903         mutex_unlock(&team->lock);
1904 }
1905
1906 static int team_netpoll_setup(struct net_device *dev,
1907                               struct netpoll_info *npifo)
1908 {
1909         struct team *team = netdev_priv(dev);
1910         struct team_port *port;
1911         int err = 0;
1912
1913         mutex_lock(&team->lock);
1914         list_for_each_entry(port, &team->port_list, list) {
1915                 err = __team_port_enable_netpoll(port);
1916                 if (err) {
1917                         __team_netpoll_cleanup(team);
1918                         break;
1919                 }
1920         }
1921         mutex_unlock(&team->lock);
1922         return err;
1923 }
1924 #endif
1925
1926 static int team_add_slave(struct net_device *dev, struct net_device *port_dev,
1927                           struct netlink_ext_ack *extack)
1928 {
1929         struct team *team = netdev_priv(dev);
1930         int err;
1931
1932         mutex_lock(&team->lock);
1933         err = team_port_add(team, port_dev, extack);
1934         mutex_unlock(&team->lock);
1935
1936         if (!err)
1937                 netdev_change_features(dev);
1938
1939         return err;
1940 }
1941
1942 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1943 {
1944         struct team *team = netdev_priv(dev);
1945         int err;
1946
1947         mutex_lock(&team->lock);
1948         err = team_port_del(team, port_dev);
1949         mutex_unlock(&team->lock);
1950
1951         if (!err)
1952                 netdev_change_features(dev);
1953
1954         return err;
1955 }
1956
1957 static netdev_features_t team_fix_features(struct net_device *dev,
1958                                            netdev_features_t features)
1959 {
1960         struct team_port *port;
1961         struct team *team = netdev_priv(dev);
1962         netdev_features_t mask;
1963
1964         mask = features;
1965         features &= ~NETIF_F_ONE_FOR_ALL;
1966         features |= NETIF_F_ALL_FOR_ALL;
1967
1968         rcu_read_lock();
1969         list_for_each_entry_rcu(port, &team->port_list, list) {
1970                 features = netdev_increment_features(features,
1971                                                      port->dev->features,
1972                                                      mask);
1973         }
1974         rcu_read_unlock();
1975
1976         features = netdev_add_tso_features(features, mask);
1977
1978         return features;
1979 }
1980
1981 static int team_change_carrier(struct net_device *dev, bool new_carrier)
1982 {
1983         struct team *team = netdev_priv(dev);
1984
1985         team->user_carrier_enabled = true;
1986
1987         if (new_carrier)
1988                 netif_carrier_on(dev);
1989         else
1990                 netif_carrier_off(dev);
1991         return 0;
1992 }
1993
1994 static const struct net_device_ops team_netdev_ops = {
1995         .ndo_init               = team_init,
1996         .ndo_uninit             = team_uninit,
1997         .ndo_open               = team_open,
1998         .ndo_stop               = team_close,
1999         .ndo_start_xmit         = team_xmit,
2000         .ndo_select_queue       = team_select_queue,
2001         .ndo_change_rx_flags    = team_change_rx_flags,
2002         .ndo_set_rx_mode        = team_set_rx_mode,
2003         .ndo_set_mac_address    = team_set_mac_address,
2004         .ndo_change_mtu         = team_change_mtu,
2005         .ndo_get_stats64        = team_get_stats64,
2006         .ndo_vlan_rx_add_vid    = team_vlan_rx_add_vid,
2007         .ndo_vlan_rx_kill_vid   = team_vlan_rx_kill_vid,
2008 #ifdef CONFIG_NET_POLL_CONTROLLER
2009         .ndo_poll_controller    = team_poll_controller,
2010         .ndo_netpoll_setup      = team_netpoll_setup,
2011         .ndo_netpoll_cleanup    = team_netpoll_cleanup,
2012 #endif
2013         .ndo_add_slave          = team_add_slave,
2014         .ndo_del_slave          = team_del_slave,
2015         .ndo_fix_features       = team_fix_features,
2016         .ndo_change_carrier     = team_change_carrier,
2017         .ndo_features_check     = passthru_features_check,
2018 };
2019
2020 /***********************
2021  * ethtool interface
2022  ***********************/
2023
2024 static void team_ethtool_get_drvinfo(struct net_device *dev,
2025                                      struct ethtool_drvinfo *drvinfo)
2026 {
2027         strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
2028         strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2029 }
2030
2031 static const struct ethtool_ops team_ethtool_ops = {
2032         .get_drvinfo            = team_ethtool_get_drvinfo,
2033         .get_link               = ethtool_op_get_link,
2034 };
2035
2036 /***********************
2037  * rt netlink interface
2038  ***********************/
2039
2040 static void team_setup_by_port(struct net_device *dev,
2041                                struct net_device *port_dev)
2042 {
2043         dev->header_ops = port_dev->header_ops;
2044         dev->type = port_dev->type;
2045         dev->hard_header_len = port_dev->hard_header_len;
2046         dev->addr_len = port_dev->addr_len;
2047         dev->mtu = port_dev->mtu;
2048         memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2049         eth_hw_addr_inherit(dev, port_dev);
2050 }
2051
2052 static int team_dev_type_check_change(struct net_device *dev,
2053                                       struct net_device *port_dev)
2054 {
2055         struct team *team = netdev_priv(dev);
2056         char *portname = port_dev->name;
2057         int err;
2058
2059         if (dev->type == port_dev->type)
2060                 return 0;
2061         if (!list_empty(&team->port_list)) {
2062                 netdev_err(dev, "Device %s is of different type\n", portname);
2063                 return -EBUSY;
2064         }
2065         err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2066         err = notifier_to_errno(err);
2067         if (err) {
2068                 netdev_err(dev, "Refused to change device type\n");
2069                 return err;
2070         }
2071         dev_uc_flush(dev);
2072         dev_mc_flush(dev);
2073         team_setup_by_port(dev, port_dev);
2074         call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2075         return 0;
2076 }
2077
2078 static void team_setup(struct net_device *dev)
2079 {
2080         ether_setup(dev);
2081         dev->max_mtu = ETH_MAX_MTU;
2082
2083         dev->netdev_ops = &team_netdev_ops;
2084         dev->ethtool_ops = &team_ethtool_ops;
2085         dev->needs_free_netdev = true;
2086         dev->priv_destructor = team_destructor;
2087         dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2088         dev->priv_flags |= IFF_NO_QUEUE;
2089         dev->priv_flags |= IFF_TEAM;
2090
2091         /*
2092          * Indicate we support unicast address filtering. That way core won't
2093          * bring us to promisc mode in case a unicast addr is added.
2094          * Let this up to underlay drivers.
2095          */
2096         dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2097
2098         dev->features |= NETIF_F_LLTX;
2099         dev->features |= NETIF_F_GRO;
2100
2101         /* Don't allow team devices to change network namespaces. */
2102         dev->features |= NETIF_F_NETNS_LOCAL;
2103
2104         dev->hw_features = TEAM_VLAN_FEATURES |
2105                            NETIF_F_HW_VLAN_CTAG_TX |
2106                            NETIF_F_HW_VLAN_CTAG_RX |
2107                            NETIF_F_HW_VLAN_CTAG_FILTER;
2108
2109         dev->hw_features |= NETIF_F_GSO_ENCAP_ALL | NETIF_F_GSO_UDP_L4;
2110         dev->features |= dev->hw_features;
2111 }
2112
2113 static int team_newlink(struct net *src_net, struct net_device *dev,
2114                         struct nlattr *tb[], struct nlattr *data[],
2115                         struct netlink_ext_ack *extack)
2116 {
2117         if (tb[IFLA_ADDRESS] == NULL)
2118                 eth_hw_addr_random(dev);
2119
2120         return register_netdevice(dev);
2121 }
2122
2123 static int team_validate(struct nlattr *tb[], struct nlattr *data[],
2124                          struct netlink_ext_ack *extack)
2125 {
2126         if (tb[IFLA_ADDRESS]) {
2127                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2128                         return -EINVAL;
2129                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2130                         return -EADDRNOTAVAIL;
2131         }
2132         return 0;
2133 }
2134
2135 static unsigned int team_get_num_tx_queues(void)
2136 {
2137         return TEAM_DEFAULT_NUM_TX_QUEUES;
2138 }
2139
2140 static unsigned int team_get_num_rx_queues(void)
2141 {
2142         return TEAM_DEFAULT_NUM_RX_QUEUES;
2143 }
2144
2145 static struct rtnl_link_ops team_link_ops __read_mostly = {
2146         .kind                   = DRV_NAME,
2147         .priv_size              = sizeof(struct team),
2148         .setup                  = team_setup,
2149         .newlink                = team_newlink,
2150         .validate               = team_validate,
2151         .get_num_tx_queues      = team_get_num_tx_queues,
2152         .get_num_rx_queues      = team_get_num_rx_queues,
2153 };
2154
2155
2156 /***********************************
2157  * Generic netlink custom interface
2158  ***********************************/
2159
2160 static struct genl_family team_nl_family;
2161
2162 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2163         [TEAM_ATTR_UNSPEC]                      = { .type = NLA_UNSPEC, },
2164         [TEAM_ATTR_TEAM_IFINDEX]                = { .type = NLA_U32 },
2165         [TEAM_ATTR_LIST_OPTION]                 = { .type = NLA_NESTED },
2166         [TEAM_ATTR_LIST_PORT]                   = { .type = NLA_NESTED },
2167 };
2168
2169 static const struct nla_policy
2170 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2171         [TEAM_ATTR_OPTION_UNSPEC]               = { .type = NLA_UNSPEC, },
2172         [TEAM_ATTR_OPTION_NAME] = {
2173                 .type = NLA_STRING,
2174                 .len = TEAM_STRING_MAX_LEN,
2175         },
2176         [TEAM_ATTR_OPTION_CHANGED]              = { .type = NLA_FLAG },
2177         [TEAM_ATTR_OPTION_TYPE]                 = { .type = NLA_U8 },
2178         [TEAM_ATTR_OPTION_DATA]                 = { .type = NLA_BINARY },
2179 };
2180
2181 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2182 {
2183         struct sk_buff *msg;
2184         void *hdr;
2185         int err;
2186
2187         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2188         if (!msg)
2189                 return -ENOMEM;
2190
2191         hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2192                           &team_nl_family, 0, TEAM_CMD_NOOP);
2193         if (!hdr) {
2194                 err = -EMSGSIZE;
2195                 goto err_msg_put;
2196         }
2197
2198         genlmsg_end(msg, hdr);
2199
2200         return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2201
2202 err_msg_put:
2203         nlmsg_free(msg);
2204
2205         return err;
2206 }
2207
2208 /*
2209  * Netlink cmd functions should be locked by following two functions.
2210  * Since dev gets held here, that ensures dev won't disappear in between.
2211  */
2212 static struct team *team_nl_team_get(struct genl_info *info)
2213 {
2214         struct net *net = genl_info_net(info);
2215         int ifindex;
2216         struct net_device *dev;
2217         struct team *team;
2218
2219         if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2220                 return NULL;
2221
2222         ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2223         dev = dev_get_by_index(net, ifindex);
2224         if (!dev || dev->netdev_ops != &team_netdev_ops) {
2225                 if (dev)
2226                         dev_put(dev);
2227                 return NULL;
2228         }
2229
2230         team = netdev_priv(dev);
2231         mutex_lock(&team->lock);
2232         return team;
2233 }
2234
2235 static void team_nl_team_put(struct team *team)
2236 {
2237         mutex_unlock(&team->lock);
2238         dev_put(team->dev);
2239 }
2240
2241 typedef int team_nl_send_func_t(struct sk_buff *skb,
2242                                 struct team *team, u32 portid);
2243
2244 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2245 {
2246         return genlmsg_unicast(dev_net(team->dev), skb, portid);
2247 }
2248
2249 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2250                                        struct team_option_inst *opt_inst)
2251 {
2252         struct nlattr *option_item;
2253         struct team_option *option = opt_inst->option;
2254         struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2255         struct team_gsetter_ctx ctx;
2256         int err;
2257
2258         ctx.info = opt_inst_info;
2259         err = team_option_get(team, opt_inst, &ctx);
2260         if (err)
2261                 return err;
2262
2263         option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
2264         if (!option_item)
2265                 return -EMSGSIZE;
2266
2267         if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2268                 goto nest_cancel;
2269         if (opt_inst_info->port &&
2270             nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2271                         opt_inst_info->port->dev->ifindex))
2272                 goto nest_cancel;
2273         if (opt_inst->option->array_size &&
2274             nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2275                         opt_inst_info->array_index))
2276                 goto nest_cancel;
2277
2278         switch (option->type) {
2279         case TEAM_OPTION_TYPE_U32:
2280                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2281                         goto nest_cancel;
2282                 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2283                         goto nest_cancel;
2284                 break;
2285         case TEAM_OPTION_TYPE_STRING:
2286                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2287                         goto nest_cancel;
2288                 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2289                                    ctx.data.str_val))
2290                         goto nest_cancel;
2291                 break;
2292         case TEAM_OPTION_TYPE_BINARY:
2293                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2294                         goto nest_cancel;
2295                 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2296                             ctx.data.bin_val.ptr))
2297                         goto nest_cancel;
2298                 break;
2299         case TEAM_OPTION_TYPE_BOOL:
2300                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2301                         goto nest_cancel;
2302                 if (ctx.data.bool_val &&
2303                     nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2304                         goto nest_cancel;
2305                 break;
2306         case TEAM_OPTION_TYPE_S32:
2307                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2308                         goto nest_cancel;
2309                 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2310                         goto nest_cancel;
2311                 break;
2312         default:
2313                 BUG();
2314         }
2315         if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2316                 goto nest_cancel;
2317         if (opt_inst->changed) {
2318                 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2319                         goto nest_cancel;
2320                 opt_inst->changed = false;
2321         }
2322         nla_nest_end(skb, option_item);
2323         return 0;
2324
2325 nest_cancel:
2326         nla_nest_cancel(skb, option_item);
2327         return -EMSGSIZE;
2328 }
2329
2330 static int __send_and_alloc_skb(struct sk_buff **pskb,
2331                                 struct team *team, u32 portid,
2332                                 team_nl_send_func_t *send_func)
2333 {
2334         int err;
2335
2336         if (*pskb) {
2337                 err = send_func(*pskb, team, portid);
2338                 if (err)
2339                         return err;
2340         }
2341         *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2342         if (!*pskb)
2343                 return -ENOMEM;
2344         return 0;
2345 }
2346
2347 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2348                                     int flags, team_nl_send_func_t *send_func,
2349                                     struct list_head *sel_opt_inst_list)
2350 {
2351         struct nlattr *option_list;
2352         struct nlmsghdr *nlh;
2353         void *hdr;
2354         struct team_option_inst *opt_inst;
2355         int err;
2356         struct sk_buff *skb = NULL;
2357         bool incomplete;
2358         int i;
2359
2360         opt_inst = list_first_entry(sel_opt_inst_list,
2361                                     struct team_option_inst, tmp_list);
2362
2363 start_again:
2364         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2365         if (err)
2366                 return err;
2367
2368         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2369                           TEAM_CMD_OPTIONS_GET);
2370         if (!hdr) {
2371                 nlmsg_free(skb);
2372                 return -EMSGSIZE;
2373         }
2374
2375         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2376                 goto nla_put_failure;
2377         option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2378         if (!option_list)
2379                 goto nla_put_failure;
2380
2381         i = 0;
2382         incomplete = false;
2383         list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2384                 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2385                 if (err) {
2386                         if (err == -EMSGSIZE) {
2387                                 if (!i)
2388                                         goto errout;
2389                                 incomplete = true;
2390                                 break;
2391                         }
2392                         goto errout;
2393                 }
2394                 i++;
2395         }
2396
2397         nla_nest_end(skb, option_list);
2398         genlmsg_end(skb, hdr);
2399         if (incomplete)
2400                 goto start_again;
2401
2402 send_done:
2403         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2404         if (!nlh) {
2405                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2406                 if (err)
2407                         return err;
2408                 goto send_done;
2409         }
2410
2411         return send_func(skb, team, portid);
2412
2413 nla_put_failure:
2414         err = -EMSGSIZE;
2415 errout:
2416         nlmsg_free(skb);
2417         return err;
2418 }
2419
2420 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2421 {
2422         struct team *team;
2423         struct team_option_inst *opt_inst;
2424         int err;
2425         LIST_HEAD(sel_opt_inst_list);
2426
2427         team = team_nl_team_get(info);
2428         if (!team)
2429                 return -EINVAL;
2430
2431         list_for_each_entry(opt_inst, &team->option_inst_list, list)
2432                 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2433         err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2434                                        NLM_F_ACK, team_nl_send_unicast,
2435                                        &sel_opt_inst_list);
2436
2437         team_nl_team_put(team);
2438
2439         return err;
2440 }
2441
2442 static int team_nl_send_event_options_get(struct team *team,
2443                                           struct list_head *sel_opt_inst_list);
2444
2445 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2446 {
2447         struct team *team;
2448         int err = 0;
2449         int i;
2450         struct nlattr *nl_option;
2451
2452         rtnl_lock();
2453
2454         team = team_nl_team_get(info);
2455         if (!team) {
2456                 err = -EINVAL;
2457                 goto rtnl_unlock;
2458         }
2459
2460         err = -EINVAL;
2461         if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2462                 err = -EINVAL;
2463                 goto team_put;
2464         }
2465
2466         nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2467                 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2468                 struct nlattr *attr;
2469                 struct nlattr *attr_data;
2470                 LIST_HEAD(opt_inst_list);
2471                 enum team_option_type opt_type;
2472                 int opt_port_ifindex = 0; /* != 0 for per-port options */
2473                 u32 opt_array_index = 0;
2474                 bool opt_is_array = false;
2475                 struct team_option_inst *opt_inst;
2476                 char *opt_name;
2477                 bool opt_found = false;
2478
2479                 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2480                         err = -EINVAL;
2481                         goto team_put;
2482                 }
2483                 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2484                                        nl_option, team_nl_option_policy,
2485                                        info->extack);
2486                 if (err)
2487                         goto team_put;
2488                 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2489                     !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2490                         err = -EINVAL;
2491                         goto team_put;
2492                 }
2493                 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2494                 case NLA_U32:
2495                         opt_type = TEAM_OPTION_TYPE_U32;
2496                         break;
2497                 case NLA_STRING:
2498                         opt_type = TEAM_OPTION_TYPE_STRING;
2499                         break;
2500                 case NLA_BINARY:
2501                         opt_type = TEAM_OPTION_TYPE_BINARY;
2502                         break;
2503                 case NLA_FLAG:
2504                         opt_type = TEAM_OPTION_TYPE_BOOL;
2505                         break;
2506                 case NLA_S32:
2507                         opt_type = TEAM_OPTION_TYPE_S32;
2508                         break;
2509                 default:
2510                         goto team_put;
2511                 }
2512
2513                 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2514                 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2515                         err = -EINVAL;
2516                         goto team_put;
2517                 }
2518
2519                 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2520                 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2521                 if (attr)
2522                         opt_port_ifindex = nla_get_u32(attr);
2523
2524                 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2525                 if (attr) {
2526                         opt_is_array = true;
2527                         opt_array_index = nla_get_u32(attr);
2528                 }
2529
2530                 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2531                         struct team_option *option = opt_inst->option;
2532                         struct team_gsetter_ctx ctx;
2533                         struct team_option_inst_info *opt_inst_info;
2534                         int tmp_ifindex;
2535
2536                         opt_inst_info = &opt_inst->info;
2537                         tmp_ifindex = opt_inst_info->port ?
2538                                       opt_inst_info->port->dev->ifindex : 0;
2539                         if (option->type != opt_type ||
2540                             strcmp(option->name, opt_name) ||
2541                             tmp_ifindex != opt_port_ifindex ||
2542                             (option->array_size && !opt_is_array) ||
2543                             opt_inst_info->array_index != opt_array_index)
2544                                 continue;
2545                         opt_found = true;
2546                         ctx.info = opt_inst_info;
2547                         switch (opt_type) {
2548                         case TEAM_OPTION_TYPE_U32:
2549                                 ctx.data.u32_val = nla_get_u32(attr_data);
2550                                 break;
2551                         case TEAM_OPTION_TYPE_STRING:
2552                                 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2553                                         err = -EINVAL;
2554                                         goto team_put;
2555                                 }
2556                                 ctx.data.str_val = nla_data(attr_data);
2557                                 break;
2558                         case TEAM_OPTION_TYPE_BINARY:
2559                                 ctx.data.bin_val.len = nla_len(attr_data);
2560                                 ctx.data.bin_val.ptr = nla_data(attr_data);
2561                                 break;
2562                         case TEAM_OPTION_TYPE_BOOL:
2563                                 ctx.data.bool_val = attr_data ? true : false;
2564                                 break;
2565                         case TEAM_OPTION_TYPE_S32:
2566                                 ctx.data.s32_val = nla_get_s32(attr_data);
2567                                 break;
2568                         default:
2569                                 BUG();
2570                         }
2571                         err = team_option_set(team, opt_inst, &ctx);
2572                         if (err)
2573                                 goto team_put;
2574                         opt_inst->changed = true;
2575                         list_add(&opt_inst->tmp_list, &opt_inst_list);
2576                 }
2577                 if (!opt_found) {
2578                         err = -ENOENT;
2579                         goto team_put;
2580                 }
2581
2582                 err = team_nl_send_event_options_get(team, &opt_inst_list);
2583                 if (err)
2584                         break;
2585         }
2586
2587 team_put:
2588         team_nl_team_put(team);
2589 rtnl_unlock:
2590         rtnl_unlock();
2591         return err;
2592 }
2593
2594 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2595                                      struct team_port *port)
2596 {
2597         struct nlattr *port_item;
2598
2599         port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2600         if (!port_item)
2601                 goto nest_cancel;
2602         if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2603                 goto nest_cancel;
2604         if (port->changed) {
2605                 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2606                         goto nest_cancel;
2607                 port->changed = false;
2608         }
2609         if ((port->removed &&
2610              nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2611             (port->state.linkup &&
2612              nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2613             nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2614             nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2615                 goto nest_cancel;
2616         nla_nest_end(skb, port_item);
2617         return 0;
2618
2619 nest_cancel:
2620         nla_nest_cancel(skb, port_item);
2621         return -EMSGSIZE;
2622 }
2623
2624 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2625                                       int flags, team_nl_send_func_t *send_func,
2626                                       struct team_port *one_port)
2627 {
2628         struct nlattr *port_list;
2629         struct nlmsghdr *nlh;
2630         void *hdr;
2631         struct team_port *port;
2632         int err;
2633         struct sk_buff *skb = NULL;
2634         bool incomplete;
2635         int i;
2636
2637         port = list_first_entry_or_null(&team->port_list,
2638                                         struct team_port, list);
2639
2640 start_again:
2641         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2642         if (err)
2643                 return err;
2644
2645         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2646                           TEAM_CMD_PORT_LIST_GET);
2647         if (!hdr) {
2648                 nlmsg_free(skb);
2649                 return -EMSGSIZE;
2650         }
2651
2652         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2653                 goto nla_put_failure;
2654         port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2655         if (!port_list)
2656                 goto nla_put_failure;
2657
2658         i = 0;
2659         incomplete = false;
2660
2661         /* If one port is selected, called wants to send port list containing
2662          * only this port. Otherwise go through all listed ports and send all
2663          */
2664         if (one_port) {
2665                 err = team_nl_fill_one_port_get(skb, one_port);
2666                 if (err)
2667                         goto errout;
2668         } else if (port) {
2669                 list_for_each_entry_from(port, &team->port_list, list) {
2670                         err = team_nl_fill_one_port_get(skb, port);
2671                         if (err) {
2672                                 if (err == -EMSGSIZE) {
2673                                         if (!i)
2674                                                 goto errout;
2675                                         incomplete = true;
2676                                         break;
2677                                 }
2678                                 goto errout;
2679                         }
2680                         i++;
2681                 }
2682         }
2683
2684         nla_nest_end(skb, port_list);
2685         genlmsg_end(skb, hdr);
2686         if (incomplete)
2687                 goto start_again;
2688
2689 send_done:
2690         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2691         if (!nlh) {
2692                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2693                 if (err)
2694                         return err;
2695                 goto send_done;
2696         }
2697
2698         return send_func(skb, team, portid);
2699
2700 nla_put_failure:
2701         err = -EMSGSIZE;
2702 errout:
2703         nlmsg_free(skb);
2704         return err;
2705 }
2706
2707 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2708                                      struct genl_info *info)
2709 {
2710         struct team *team;
2711         int err;
2712
2713         team = team_nl_team_get(info);
2714         if (!team)
2715                 return -EINVAL;
2716
2717         err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2718                                          NLM_F_ACK, team_nl_send_unicast, NULL);
2719
2720         team_nl_team_put(team);
2721
2722         return err;
2723 }
2724
2725 static const struct genl_ops team_nl_ops[] = {
2726         {
2727                 .cmd = TEAM_CMD_NOOP,
2728                 .doit = team_nl_cmd_noop,
2729                 .policy = team_nl_policy,
2730         },
2731         {
2732                 .cmd = TEAM_CMD_OPTIONS_SET,
2733                 .doit = team_nl_cmd_options_set,
2734                 .policy = team_nl_policy,
2735                 .flags = GENL_ADMIN_PERM,
2736         },
2737         {
2738                 .cmd = TEAM_CMD_OPTIONS_GET,
2739                 .doit = team_nl_cmd_options_get,
2740                 .policy = team_nl_policy,
2741                 .flags = GENL_ADMIN_PERM,
2742         },
2743         {
2744                 .cmd = TEAM_CMD_PORT_LIST_GET,
2745                 .doit = team_nl_cmd_port_list_get,
2746                 .policy = team_nl_policy,
2747                 .flags = GENL_ADMIN_PERM,
2748         },
2749 };
2750
2751 static const struct genl_multicast_group team_nl_mcgrps[] = {
2752         { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2753 };
2754
2755 static struct genl_family team_nl_family __ro_after_init = {
2756         .name           = TEAM_GENL_NAME,
2757         .version        = TEAM_GENL_VERSION,
2758         .maxattr        = TEAM_ATTR_MAX,
2759         .netnsok        = true,
2760         .module         = THIS_MODULE,
2761         .ops            = team_nl_ops,
2762         .n_ops          = ARRAY_SIZE(team_nl_ops),
2763         .mcgrps         = team_nl_mcgrps,
2764         .n_mcgrps       = ARRAY_SIZE(team_nl_mcgrps),
2765 };
2766
2767 static int team_nl_send_multicast(struct sk_buff *skb,
2768                                   struct team *team, u32 portid)
2769 {
2770         return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2771                                        skb, 0, 0, GFP_KERNEL);
2772 }
2773
2774 static int team_nl_send_event_options_get(struct team *team,
2775                                           struct list_head *sel_opt_inst_list)
2776 {
2777         return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2778                                         sel_opt_inst_list);
2779 }
2780
2781 static int team_nl_send_event_port_get(struct team *team,
2782                                        struct team_port *port)
2783 {
2784         return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2785                                           port);
2786 }
2787
2788 static int __init team_nl_init(void)
2789 {
2790         return genl_register_family(&team_nl_family);
2791 }
2792
2793 static void team_nl_fini(void)
2794 {
2795         genl_unregister_family(&team_nl_family);
2796 }
2797
2798
2799 /******************
2800  * Change checkers
2801  ******************/
2802
2803 static void __team_options_change_check(struct team *team)
2804 {
2805         int err;
2806         struct team_option_inst *opt_inst;
2807         LIST_HEAD(sel_opt_inst_list);
2808
2809         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2810                 if (opt_inst->changed)
2811                         list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2812         }
2813         err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2814         if (err && err != -ESRCH)
2815                 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2816                             err);
2817 }
2818
2819 /* rtnl lock is held */
2820
2821 static void __team_port_change_send(struct team_port *port, bool linkup)
2822 {
2823         int err;
2824
2825         port->changed = true;
2826         port->state.linkup = linkup;
2827         team_refresh_port_linkup(port);
2828         if (linkup) {
2829                 struct ethtool_link_ksettings ecmd;
2830
2831                 err = __ethtool_get_link_ksettings(port->dev, &ecmd);
2832                 if (!err) {
2833                         port->state.speed = ecmd.base.speed;
2834                         port->state.duplex = ecmd.base.duplex;
2835                         goto send_event;
2836                 }
2837         }
2838         port->state.speed = 0;
2839         port->state.duplex = 0;
2840
2841 send_event:
2842         err = team_nl_send_event_port_get(port->team, port);
2843         if (err && err != -ESRCH)
2844                 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2845                             port->dev->name, err);
2846
2847 }
2848
2849 static void __team_carrier_check(struct team *team)
2850 {
2851         struct team_port *port;
2852         bool team_linkup;
2853
2854         if (team->user_carrier_enabled)
2855                 return;
2856
2857         team_linkup = false;
2858         list_for_each_entry(port, &team->port_list, list) {
2859                 if (port->linkup) {
2860                         team_linkup = true;
2861                         break;
2862                 }
2863         }
2864
2865         if (team_linkup)
2866                 netif_carrier_on(team->dev);
2867         else
2868                 netif_carrier_off(team->dev);
2869 }
2870
2871 static void __team_port_change_check(struct team_port *port, bool linkup)
2872 {
2873         if (port->state.linkup != linkup)
2874                 __team_port_change_send(port, linkup);
2875         __team_carrier_check(port->team);
2876 }
2877
2878 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2879 {
2880         __team_port_change_send(port, linkup);
2881         __team_carrier_check(port->team);
2882 }
2883
2884 static void __team_port_change_port_removed(struct team_port *port)
2885 {
2886         port->removed = true;
2887         __team_port_change_send(port, false);
2888         __team_carrier_check(port->team);
2889 }
2890
2891 static void team_port_change_check(struct team_port *port, bool linkup)
2892 {
2893         struct team *team = port->team;
2894
2895         mutex_lock(&team->lock);
2896         __team_port_change_check(port, linkup);
2897         mutex_unlock(&team->lock);
2898 }
2899
2900
2901 /************************************
2902  * Net device notifier event handler
2903  ************************************/
2904
2905 static int team_device_event(struct notifier_block *unused,
2906                              unsigned long event, void *ptr)
2907 {
2908         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2909         struct team_port *port;
2910
2911         port = team_port_get_rtnl(dev);
2912         if (!port)
2913                 return NOTIFY_DONE;
2914
2915         switch (event) {
2916         case NETDEV_UP:
2917                 if (netif_oper_up(dev))
2918                         team_port_change_check(port, true);
2919                 break;
2920         case NETDEV_DOWN:
2921                 team_port_change_check(port, false);
2922                 break;
2923         case NETDEV_CHANGE:
2924                 if (netif_running(port->dev))
2925                         team_port_change_check(port,
2926                                                !!netif_oper_up(port->dev));
2927                 break;
2928         case NETDEV_UNREGISTER:
2929                 team_del_slave(port->team->dev, dev);
2930                 break;
2931         case NETDEV_FEAT_CHANGE:
2932                 team_compute_features(port->team);
2933                 break;
2934         case NETDEV_PRECHANGEMTU:
2935                 /* Forbid to change mtu of underlaying device */
2936                 if (!port->team->port_mtu_change_allowed)
2937                         return NOTIFY_BAD;
2938                 break;
2939         case NETDEV_PRE_TYPE_CHANGE:
2940                 /* Forbid to change type of underlaying device */
2941                 return NOTIFY_BAD;
2942         case NETDEV_RESEND_IGMP:
2943                 /* Propagate to master device */
2944                 call_netdevice_notifiers(event, port->team->dev);
2945                 break;
2946         }
2947         return NOTIFY_DONE;
2948 }
2949
2950 static struct notifier_block team_notifier_block __read_mostly = {
2951         .notifier_call = team_device_event,
2952 };
2953
2954
2955 /***********************
2956  * Module init and exit
2957  ***********************/
2958
2959 static int __init team_module_init(void)
2960 {
2961         int err;
2962
2963         register_netdevice_notifier(&team_notifier_block);
2964
2965         err = rtnl_link_register(&team_link_ops);
2966         if (err)
2967                 goto err_rtnl_reg;
2968
2969         err = team_nl_init();
2970         if (err)
2971                 goto err_nl_init;
2972
2973         return 0;
2974
2975 err_nl_init:
2976         rtnl_link_unregister(&team_link_ops);
2977
2978 err_rtnl_reg:
2979         unregister_netdevice_notifier(&team_notifier_block);
2980
2981         return err;
2982 }
2983
2984 static void __exit team_module_exit(void)
2985 {
2986         team_nl_fini();
2987         rtnl_link_unregister(&team_link_ops);
2988         unregister_netdevice_notifier(&team_notifier_block);
2989 }
2990
2991 module_init(team_module_init);
2992 module_exit(team_module_exit);
2993
2994 MODULE_LICENSE("GPL v2");
2995 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
2996 MODULE_DESCRIPTION("Ethernet team device driver");
2997 MODULE_ALIAS_RTNL_LINK(DRV_NAME);