drivers/net/team/team.c

   1 /*
   2  * drivers/net/team/team.c - Network team device driver
   3  * Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/types.h>
  13 #include <linux/module.h>
  14 #include <linux/init.h>
  15 #include <linux/slab.h>
  16 #include <linux/rcupdate.h>
  17 #include <linux/errno.h>
  18 #include <linux/ctype.h>
  19 #include <linux/notifier.h>
  20 #include <linux/netdevice.h>
  21 #include <linux/netpoll.h>
  22 #include <linux/if_vlan.h>
  23 #include <linux/if_arp.h>
  24 #include <linux/socket.h>
  25 #include <linux/etherdevice.h>
  26 #include <linux/rtnetlink.h>
  27 #include <net/rtnetlink.h>
  28 #include <net/genetlink.h>
  29 #include <net/netlink.h>
  30 #include <net/sch_generic.h>
  31 #include <net/switchdev.h>
  32 #include <generated/utsrelease.h>
  33 #include <linux/if_team.h>
  34
  35 #define DRV_NAME "team"
  36
  37
  38 /**********
  39  * Helpers
  40  **********/
  41
  42 #define team_port_exists(dev) (dev->priv_flags & IFF_TEAM_PORT)
  43
  44 static struct team_port *team_port_get_rcu(const struct net_device *dev)
  45 {
  46         return rcu_dereference(dev->rx_handler_data);
  47 }
  48
  49 static struct team_port *team_port_get_rtnl(const struct net_device *dev)
  50 {
  51         struct team_port *port = rtnl_dereference(dev->rx_handler_data);
  52
  53         return team_port_exists(dev) ? port : NULL;
  54 }
  55
  56 /*
  57  * Since the ability to change device address for open port device is tested in
  58  * team_port_add, this function can be called without control of return value
  59  */
  60 static int __set_port_dev_addr(struct net_device *port_dev,
  61                                const unsigned char *dev_addr)
  62 {
  63         struct sockaddr_storage addr;
  64
  65         memcpy(addr.__data, dev_addr, port_dev->addr_len);
  66         addr.ss_family = port_dev->type;
  67         return dev_set_mac_address(port_dev, (struct sockaddr *)&addr);
  68 }
  69
  70 static int team_port_set_orig_dev_addr(struct team_port *port)
  71 {
  72         return __set_port_dev_addr(port->dev, port->orig.dev_addr);
  73 }
  74
  75 static int team_port_set_team_dev_addr(struct team *team,
  76                                        struct team_port *port)
  77 {
  78         return __set_port_dev_addr(port->dev, team->dev->dev_addr);
  79 }
  80
  81 int team_modeop_port_enter(struct team *team, struct team_port *port)
  82 {
  83         return team_port_set_team_dev_addr(team, port);
  84 }
  85 EXPORT_SYMBOL(team_modeop_port_enter);
  86
  87 void team_modeop_port_change_dev_addr(struct team *team,
  88                                       struct team_port *port)
  89 {
  90         team_port_set_team_dev_addr(team, port);
  91 }
  92 EXPORT_SYMBOL(team_modeop_port_change_dev_addr);
  93
  94 static void team_lower_state_changed(struct team_port *port)
  95 {
  96         struct netdev_lag_lower_state_info info;
  97
  98         info.link_up = port->linkup;
  99         info.tx_enabled = team_port_enabled(port);
 100         netdev_lower_state_changed(port->dev, &info);
 101 }
 102
 103 static void team_refresh_port_linkup(struct team_port *port)
 104 {
 105         bool new_linkup = port->user.linkup_enabled ? port->user.linkup :
 106                                                       port->state.linkup;
 107
 108         if (port->linkup != new_linkup) {
 109                 port->linkup = new_linkup;
 110                 team_lower_state_changed(port);
 111         }
 112 }
 113
 114
 115 /*******************
 116  * Options handling
 117  *******************/
 118
 119 struct team_option_inst { /* One for each option instance */
 120         struct list_head list;
 121         struct list_head tmp_list;
 122         struct team_option *option;
 123         struct team_option_inst_info info;
 124         bool changed;
 125         bool removed;
 126 };
 127
 128 static struct team_option *__team_find_option(struct team *team,
 129                                               const char *opt_name)
 130 {
 131         struct team_option *option;
 132
 133         list_for_each_entry(option, &team->option_list, list) {
 134                 if (strcmp(option->name, opt_name) == 0)
 135                         return option;
 136         }
 137         return NULL;
 138 }
 139
 140 static void __team_option_inst_del(struct team_option_inst *opt_inst)
 141 {
 142         list_del(&opt_inst->list);
 143         kfree(opt_inst);
 144 }
 145
 146 static void __team_option_inst_del_option(struct team *team,
 147                                           struct team_option *option)
 148 {
 149         struct team_option_inst *opt_inst, *tmp;
 150
 151         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 152                 if (opt_inst->option == option)
 153                         __team_option_inst_del(opt_inst);
 154         }
 155 }
 156
 157 static int __team_option_inst_add(struct team *team, struct team_option *option,
 158                                   struct team_port *port)
 159 {
 160         struct team_option_inst *opt_inst;
 161         unsigned int array_size;
 162         unsigned int i;
 163         int err;
 164
 165         array_size = option->array_size;
 166         if (!array_size)
 167                 array_size = 1; /* No array but still need one instance */
 168
 169         for (i = 0; i < array_size; i++) {
 170                 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL);
 171                 if (!opt_inst)
 172                         return -ENOMEM;
 173                 opt_inst->option = option;
 174                 opt_inst->info.port = port;
 175                 opt_inst->info.array_index = i;
 176                 opt_inst->changed = true;
 177                 opt_inst->removed = false;
 178                 list_add_tail(&opt_inst->list, &team->option_inst_list);
 179                 if (option->init) {
 180                         err = option->init(team, &opt_inst->info);
 181                         if (err)
 182                                 return err;
 183                 }
 184
 185         }
 186         return 0;
 187 }
 188
 189 static int __team_option_inst_add_option(struct team *team,
 190                                          struct team_option *option)
 191 {
 192         int err;
 193
 194         if (!option->per_port) {
 195                 err = __team_option_inst_add(team, option, NULL);
 196                 if (err)
 197                         goto inst_del_option;
 198         }
 199         return 0;
 200
 201 inst_del_option:
 202         __team_option_inst_del_option(team, option);
 203         return err;
 204 }
 205
 206 static void __team_option_inst_mark_removed_option(struct team *team,
 207                                                    struct team_option *option)
 208 {
 209         struct team_option_inst *opt_inst;
 210
 211         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 212                 if (opt_inst->option == option) {
 213                         opt_inst->changed = true;
 214                         opt_inst->removed = true;
 215                 }
 216         }
 217 }
 218
 219 static void __team_option_inst_del_port(struct team *team,
 220                                         struct team_port *port)
 221 {
 222         struct team_option_inst *opt_inst, *tmp;
 223
 224         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 225                 if (opt_inst->option->per_port &&
 226                     opt_inst->info.port == port)
 227                         __team_option_inst_del(opt_inst);
 228         }
 229 }
 230
 231 static int __team_option_inst_add_port(struct team *team,
 232                                        struct team_port *port)
 233 {
 234         struct team_option *option;
 235         int err;
 236
 237         list_for_each_entry(option, &team->option_list, list) {
 238                 if (!option->per_port)
 239                         continue;
 240                 err = __team_option_inst_add(team, option, port);
 241                 if (err)
 242                         goto inst_del_port;
 243         }
 244         return 0;
 245
 246 inst_del_port:
 247         __team_option_inst_del_port(team, port);
 248         return err;
 249 }
 250
 251 static void __team_option_inst_mark_removed_port(struct team *team,
 252                                                  struct team_port *port)
 253 {
 254         struct team_option_inst *opt_inst;
 255
 256         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 257                 if (opt_inst->info.port == port) {
 258                         opt_inst->changed = true;
 259                         opt_inst->removed = true;
 260                 }
 261         }
 262 }
 263
 264 static bool __team_option_inst_tmp_find(const struct list_head *opts,
 265                                         const struct team_option_inst *needle)
 266 {
 267         struct team_option_inst *opt_inst;
 268
 269         list_for_each_entry(opt_inst, opts, tmp_list)
 270                 if (opt_inst == needle)
 271                         return true;
 272         return false;
 273 }
 274
 275 static int __team_options_register(struct team *team,
 276                                    const struct team_option *option,
 277                                    size_t option_count)
 278 {
 279         int i;
 280         struct team_option **dst_opts;
 281         int err;
 282
 283         dst_opts = kcalloc(option_count, sizeof(struct team_option *),
 284                            GFP_KERNEL);
 285         if (!dst_opts)
 286                 return -ENOMEM;
 287         for (i = 0; i < option_count; i++, option++) {
 288                 if (__team_find_option(team, option->name)) {
 289                         err = -EEXIST;
 290                         goto alloc_rollback;
 291                 }
 292                 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
 293                 if (!dst_opts[i]) {
 294                         err = -ENOMEM;
 295                         goto alloc_rollback;
 296                 }
 297         }
 298
 299         for (i = 0; i < option_count; i++) {
 300                 err = __team_option_inst_add_option(team, dst_opts[i]);
 301                 if (err)
 302                         goto inst_rollback;
 303                 list_add_tail(&dst_opts[i]->list, &team->option_list);
 304         }
 305
 306         kfree(dst_opts);
 307         return 0;
 308
 309 inst_rollback:
 310         for (i--; i >= 0; i--)
 311                 __team_option_inst_del_option(team, dst_opts[i]);
 312
 313         i = option_count - 1;
 314 alloc_rollback:
 315         for (i--; i >= 0; i--)
 316                 kfree(dst_opts[i]);
 317
 318         kfree(dst_opts);
 319         return err;
 320 }
 321
 322 static void __team_options_mark_removed(struct team *team,
 323                                         const struct team_option *option,
 324                                         size_t option_count)
 325 {
 326         int i;
 327
 328         for (i = 0; i < option_count; i++, option++) {
 329                 struct team_option *del_opt;
 330
 331                 del_opt = __team_find_option(team, option->name);
 332                 if (del_opt)
 333                         __team_option_inst_mark_removed_option(team, del_opt);
 334         }
 335 }
 336
 337 static void __team_options_unregister(struct team *team,
 338                                       const struct team_option *option,
 339                                       size_t option_count)
 340 {
 341         int i;
 342
 343         for (i = 0; i < option_count; i++, option++) {
 344                 struct team_option *del_opt;
 345
 346                 del_opt = __team_find_option(team, option->name);
 347                 if (del_opt) {
 348                         __team_option_inst_del_option(team, del_opt);
 349                         list_del(&del_opt->list);
 350                         kfree(del_opt);
 351                 }
 352         }
 353 }
 354
 355 static void __team_options_change_check(struct team *team);
 356
 357 int team_options_register(struct team *team,
 358                           const struct team_option *option,
 359                           size_t option_count)
 360 {
 361         int err;
 362
 363         err = __team_options_register(team, option, option_count);
 364         if (err)
 365                 return err;
 366         __team_options_change_check(team);
 367         return 0;
 368 }
 369 EXPORT_SYMBOL(team_options_register);
 370
 371 void team_options_unregister(struct team *team,
 372                              const struct team_option *option,
 373                              size_t option_count)
 374 {
 375         __team_options_mark_removed(team, option, option_count);
 376         __team_options_change_check(team);
 377         __team_options_unregister(team, option, option_count);
 378 }
 379 EXPORT_SYMBOL(team_options_unregister);
 380
 381 static int team_option_get(struct team *team,
 382                            struct team_option_inst *opt_inst,
 383                            struct team_gsetter_ctx *ctx)
 384 {
 385         if (!opt_inst->option->getter)
 386                 return -EOPNOTSUPP;
 387         return opt_inst->option->getter(team, ctx);
 388 }
 389
 390 static int team_option_set(struct team *team,
 391                            struct team_option_inst *opt_inst,
 392                            struct team_gsetter_ctx *ctx)
 393 {
 394         if (!opt_inst->option->setter)
 395                 return -EOPNOTSUPP;
 396         return opt_inst->option->setter(team, ctx);
 397 }
 398
 399 void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info)
 400 {
 401         struct team_option_inst *opt_inst;
 402
 403         opt_inst = container_of(opt_inst_info, struct team_option_inst, info);
 404         opt_inst->changed = true;
 405 }
 406 EXPORT_SYMBOL(team_option_inst_set_change);
 407
 408 void team_options_change_check(struct team *team)
 409 {
 410         __team_options_change_check(team);
 411 }
 412 EXPORT_SYMBOL(team_options_change_check);
 413
 414
 415 /****************
 416  * Mode handling
 417  ****************/
 418
 419 static LIST_HEAD(mode_list);
 420 static DEFINE_SPINLOCK(mode_list_lock);
 421
 422 struct team_mode_item {
 423         struct list_head list;
 424         const struct team_mode *mode;
 425 };
 426
 427 static struct team_mode_item *__find_mode(const char *kind)
 428 {
 429         struct team_mode_item *mitem;
 430
 431         list_for_each_entry(mitem, &mode_list, list) {
 432                 if (strcmp(mitem->mode->kind, kind) == 0)
 433                         return mitem;
 434         }
 435         return NULL;
 436 }
 437
 438 static bool is_good_mode_name(const char *name)
 439 {
 440         while (*name != '\0') {
 441                 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
 442                         return false;
 443                 name++;
 444         }
 445         return true;
 446 }
 447
 448 int team_mode_register(const struct team_mode *mode)
 449 {
 450         int err = 0;
 451         struct team_mode_item *mitem;
 452
 453         if (!is_good_mode_name(mode->kind) ||
 454             mode->priv_size > TEAM_MODE_PRIV_SIZE)
 455                 return -EINVAL;
 456
 457         mitem = kmalloc(sizeof(*mitem), GFP_KERNEL);
 458         if (!mitem)
 459                 return -ENOMEM;
 460
 461         spin_lock(&mode_list_lock);
 462         if (__find_mode(mode->kind)) {
 463                 err = -EEXIST;
 464                 kfree(mitem);
 465                 goto unlock;
 466         }
 467         mitem->mode = mode;
 468         list_add_tail(&mitem->list, &mode_list);
 469 unlock:
 470         spin_unlock(&mode_list_lock);
 471         return err;
 472 }
 473 EXPORT_SYMBOL(team_mode_register);
 474
 475 void team_mode_unregister(const struct team_mode *mode)
 476 {
 477         struct team_mode_item *mitem;
 478
 479         spin_lock(&mode_list_lock);
 480         mitem = __find_mode(mode->kind);
 481         if (mitem) {
 482                 list_del_init(&mitem->list);
 483                 kfree(mitem);
 484         }
 485         spin_unlock(&mode_list_lock);
 486 }
 487 EXPORT_SYMBOL(team_mode_unregister);
 488
 489 static const struct team_mode *team_mode_get(const char *kind)
 490 {
 491         struct team_mode_item *mitem;
 492         const struct team_mode *mode = NULL;
 493
 494         spin_lock(&mode_list_lock);
 495         mitem = __find_mode(kind);
 496         if (!mitem) {
 497                 spin_unlock(&mode_list_lock);
 498                 request_module("team-mode-%s", kind);
 499                 spin_lock(&mode_list_lock);
 500                 mitem = __find_mode(kind);
 501         }
 502         if (mitem) {
 503                 mode = mitem->mode;
 504                 if (!try_module_get(mode->owner))
 505                         mode = NULL;
 506         }
 507
 508         spin_unlock(&mode_list_lock);
 509         return mode;
 510 }
 511
 512 static void team_mode_put(const struct team_mode *mode)
 513 {
 514         module_put(mode->owner);
 515 }
 516
 517 static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
 518 {
 519         dev_kfree_skb_any(skb);
 520         return false;
 521 }
 522
 523 static rx_handler_result_t team_dummy_receive(struct team *team,
 524                                               struct team_port *port,
 525                                               struct sk_buff *skb)
 526 {
 527         return RX_HANDLER_ANOTHER;
 528 }
 529
 530 static const struct team_mode __team_no_mode = {
 531         .kind           = "*NOMODE*",
 532 };
 533
 534 static bool team_is_mode_set(struct team *team)
 535 {
 536         return team->mode != &__team_no_mode;
 537 }
 538
 539 static void team_set_no_mode(struct team *team)
 540 {
 541         team->user_carrier_enabled = false;
 542         team->mode = &__team_no_mode;
 543 }
 544
 545 static void team_adjust_ops(struct team *team)
 546 {
 547         /*
 548          * To avoid checks in rx/tx skb paths, ensure here that non-null and
 549          * correct ops are always set.
 550          */
 551
 552         if (!team->en_port_count || !team_is_mode_set(team) ||
 553             !team->mode->ops->transmit)
 554                 team->ops.transmit = team_dummy_transmit;
 555         else
 556                 team->ops.transmit = team->mode->ops->transmit;
 557
 558         if (!team->en_port_count || !team_is_mode_set(team) ||
 559             !team->mode->ops->receive)
 560                 team->ops.receive = team_dummy_receive;
 561         else
 562                 team->ops.receive = team->mode->ops->receive;
 563 }
 564
 565 /*
 566  * We can benefit from the fact that it's ensured no port is present
 567  * at the time of mode change. Therefore no packets are in fly so there's no
 568  * need to set mode operations in any special way.
 569  */
 570 static int __team_change_mode(struct team *team,
 571                               const struct team_mode *new_mode)
 572 {
 573         /* Check if mode was previously set and do cleanup if so */
 574         if (team_is_mode_set(team)) {
 575                 void (*exit_op)(struct team *team) = team->ops.exit;
 576
 577                 /* Clear ops area so no callback is called any longer */
 578                 memset(&team->ops, 0, sizeof(struct team_mode_ops));
 579                 team_adjust_ops(team);
 580
 581                 if (exit_op)
 582                         exit_op(team);
 583                 team_mode_put(team->mode);
 584                 team_set_no_mode(team);
 585                 /* zero private data area */
 586                 memset(&team->mode_priv, 0,
 587                        sizeof(struct team) - offsetof(struct team, mode_priv));
 588         }
 589
 590         if (!new_mode)
 591                 return 0;
 592
 593         if (new_mode->ops->init) {
 594                 int err;
 595
 596                 err = new_mode->ops->init(team);
 597                 if (err)
 598                         return err;
 599         }
 600
 601         team->mode = new_mode;
 602         memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
 603         team_adjust_ops(team);
 604
 605         return 0;
 606 }
 607
 608 static int team_change_mode(struct team *team, const char *kind)
 609 {
 610         const struct team_mode *new_mode;
 611         struct net_device *dev = team->dev;
 612         int err;
 613
 614         if (!list_empty(&team->port_list)) {
 615                 netdev_err(dev, "No ports can be present during mode change\n");
 616                 return -EBUSY;
 617         }
 618
 619         if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) {
 620                 netdev_err(dev, "Unable to change to the same mode the team is in\n");
 621                 return -EINVAL;
 622         }
 623
 624         new_mode = team_mode_get(kind);
 625         if (!new_mode) {
 626                 netdev_err(dev, "Mode \"%s\" not found\n", kind);
 627                 return -EINVAL;
 628         }
 629
 630         err = __team_change_mode(team, new_mode);
 631         if (err) {
 632                 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
 633                 team_mode_put(new_mode);
 634                 return err;
 635         }
 636
 637         netdev_info(dev, "Mode changed to \"%s\"\n", kind);
 638         return 0;
 639 }
 640
 641
 642 /*********************
 643  * Peers notification
 644  *********************/
 645
 646 static void team_notify_peers_work(struct work_struct *work)
 647 {
 648         struct team *team;
 649         int val;
 650
 651         team = container_of(work, struct team, notify_peers.dw.work);
 652
 653         if (!rtnl_trylock()) {
 654                 schedule_delayed_work(&team->notify_peers.dw, 0);
 655                 return;
 656         }
 657         val = atomic_dec_if_positive(&team->notify_peers.count_pending);
 658         if (val < 0) {
 659                 rtnl_unlock();
 660                 return;
 661         }
 662         call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, team->dev);
 663         rtnl_unlock();
 664         if (val)
 665                 schedule_delayed_work(&team->notify_peers.dw,
 666                                       msecs_to_jiffies(team->notify_peers.interval));
 667 }
 668
 669 static void team_notify_peers(struct team *team)
 670 {
 671         if (!team->notify_peers.count || !netif_running(team->dev))
 672                 return;
 673         atomic_add(team->notify_peers.count, &team->notify_peers.count_pending);
 674         schedule_delayed_work(&team->notify_peers.dw, 0);
 675 }
 676
 677 static void team_notify_peers_init(struct team *team)
 678 {
 679         INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work);
 680 }
 681
 682 static void team_notify_peers_fini(struct team *team)
 683 {
 684         cancel_delayed_work_sync(&team->notify_peers.dw);
 685 }
 686
 687
 688 /*******************************
 689  * Send multicast group rejoins
 690  *******************************/
 691
 692 static void team_mcast_rejoin_work(struct work_struct *work)
 693 {
 694         struct team *team;
 695         int val;
 696
 697         team = container_of(work, struct team, mcast_rejoin.dw.work);
 698
 699         if (!rtnl_trylock()) {
 700                 schedule_delayed_work(&team->mcast_rejoin.dw, 0);
 701                 return;
 702         }
 703         val = atomic_dec_if_positive(&team->mcast_rejoin.count_pending);
 704         if (val < 0) {
 705                 rtnl_unlock();
 706                 return;
 707         }
 708         call_netdevice_notifiers(NETDEV_RESEND_IGMP, team->dev);
 709         rtnl_unlock();
 710         if (val)
 711                 schedule_delayed_work(&team->mcast_rejoin.dw,
 712                                       msecs_to_jiffies(team->mcast_rejoin.interval));
 713 }
 714
 715 static void team_mcast_rejoin(struct team *team)
 716 {
 717         if (!team->mcast_rejoin.count || !netif_running(team->dev))
 718                 return;
 719         atomic_add(team->mcast_rejoin.count, &team->mcast_rejoin.count_pending);
 720         schedule_delayed_work(&team->mcast_rejoin.dw, 0);
 721 }
 722
 723 static void team_mcast_rejoin_init(struct team *team)
 724 {
 725         INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work);
 726 }
 727
 728 static void team_mcast_rejoin_fini(struct team *team)
 729 {
 730         cancel_delayed_work_sync(&team->mcast_rejoin.dw);
 731 }
 732
 733
 734 /************************
 735  * Rx path frame handler
 736  ************************/
 737
 738 /* note: already called with rcu_read_lock */
 739 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
 740 {
 741         struct sk_buff *skb = *pskb;
 742         struct team_port *port;
 743         struct team *team;
 744         rx_handler_result_t res;
 745
 746         skb = skb_share_check(skb, GFP_ATOMIC);
 747         if (!skb)
 748                 return RX_HANDLER_CONSUMED;
 749
 750         *pskb = skb;
 751
 752         port = team_port_get_rcu(skb->dev);
 753         team = port->team;
 754         if (!team_port_enabled(port)) {
 755                 /* allow exact match delivery for disabled ports */
 756                 res = RX_HANDLER_EXACT;
 757         } else {
 758                 res = team->ops.receive(team, port, skb);
 759         }
 760         if (res == RX_HANDLER_ANOTHER) {
 761                 struct team_pcpu_stats *pcpu_stats;
 762
 763                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
 764                 u64_stats_update_begin(&pcpu_stats->syncp);
 765                 pcpu_stats->rx_packets++;
 766                 pcpu_stats->rx_bytes += skb->len;
 767                 if (skb->pkt_type == PACKET_MULTICAST)
 768                         pcpu_stats->rx_multicast++;
 769                 u64_stats_update_end(&pcpu_stats->syncp);
 770
 771                 skb->dev = team->dev;
 772         } else if (res == RX_HANDLER_EXACT) {
 773                 this_cpu_inc(team->pcpu_stats->rx_nohandler);
 774         } else {
 775                 this_cpu_inc(team->pcpu_stats->rx_dropped);
 776         }
 777
 778         return res;
 779 }
 780
 781
 782 /*************************************
 783  * Multiqueue Tx port select override
 784  *************************************/
 785
 786 static int team_queue_override_init(struct team *team)
 787 {
 788         struct list_head *listarr;
 789         unsigned int queue_cnt = team->dev->num_tx_queues - 1;
 790         unsigned int i;
 791
 792         if (!queue_cnt)
 793                 return 0;
 794         listarr = kmalloc_array(queue_cnt, sizeof(struct list_head),
 795                                 GFP_KERNEL);
 796         if (!listarr)
 797                 return -ENOMEM;
 798         team->qom_lists = listarr;
 799         for (i = 0; i < queue_cnt; i++)
 800                 INIT_LIST_HEAD(listarr++);
 801         return 0;
 802 }
 803
 804 static void team_queue_override_fini(struct team *team)
 805 {
 806         kfree(team->qom_lists);
 807 }
 808
 809 static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
 810 {
 811         return &team->qom_lists[queue_id - 1];
 812 }
 813
 814 /*
 815  * note: already called with rcu_read_lock
 816  */
 817 static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
 818 {
 819         struct list_head *qom_list;
 820         struct team_port *port;
 821
 822         if (!team->queue_override_enabled || !skb->queue_mapping)
 823                 return false;
 824         qom_list = __team_get_qom_list(team, skb->queue_mapping);
 825         list_for_each_entry_rcu(port, qom_list, qom_list) {
 826                 if (!team_dev_queue_xmit(team, port, skb))
 827                         return true;
 828         }
 829         return false;
 830 }
 831
 832 static void __team_queue_override_port_del(struct team *team,
 833                                            struct team_port *port)
 834 {
 835         if (!port->queue_id)
 836                 return;
 837         list_del_rcu(&port->qom_list);
 838 }
 839
 840 static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
 841                                                       struct team_port *cur)
 842 {
 843         if (port->priority < cur->priority)
 844                 return true;
 845         if (port->priority > cur->priority)
 846                 return false;
 847         if (port->index < cur->index)
 848                 return true;
 849         return false;
 850 }
 851
 852 static void __team_queue_override_port_add(struct team *team,
 853                                            struct team_port *port)
 854 {
 855         struct team_port *cur;
 856         struct list_head *qom_list;
 857         struct list_head *node;
 858
 859         if (!port->queue_id)
 860                 return;
 861         qom_list = __team_get_qom_list(team, port->queue_id);
 862         node = qom_list;
 863         list_for_each_entry(cur, qom_list, qom_list) {
 864                 if (team_queue_override_port_has_gt_prio_than(port, cur))
 865                         break;
 866                 node = &cur->qom_list;
 867         }
 868         list_add_tail_rcu(&port->qom_list, node);
 869 }
 870
 871 static void __team_queue_override_enabled_check(struct team *team)
 872 {
 873         struct team_port *port;
 874         bool enabled = false;
 875
 876         list_for_each_entry(port, &team->port_list, list) {
 877                 if (port->queue_id) {
 878                         enabled = true;
 879                         break;
 880                 }
 881         }
 882         if (enabled == team->queue_override_enabled)
 883                 return;
 884         netdev_dbg(team->dev, "%s queue override\n",
 885                    enabled ? "Enabling" : "Disabling");
 886         team->queue_override_enabled = enabled;
 887 }
 888
 889 static void team_queue_override_port_prio_changed(struct team *team,
 890                                                   struct team_port *port)
 891 {
 892         if (!port->queue_id || team_port_enabled(port))
 893                 return;
 894         __team_queue_override_port_del(team, port);
 895         __team_queue_override_port_add(team, port);
 896         __team_queue_override_enabled_check(team);
 897 }
 898
 899 static void team_queue_override_port_change_queue_id(struct team *team,
 900                                                      struct team_port *port,
 901                                                      u16 new_queue_id)
 902 {
 903         if (team_port_enabled(port)) {
 904                 __team_queue_override_port_del(team, port);
 905                 port->queue_id = new_queue_id;
 906                 __team_queue_override_port_add(team, port);
 907                 __team_queue_override_enabled_check(team);
 908         } else {
 909                 port->queue_id = new_queue_id;
 910         }
 911 }
 912
 913 static void team_queue_override_port_add(struct team *team,
 914                                          struct team_port *port)
 915 {
 916         __team_queue_override_port_add(team, port);
 917         __team_queue_override_enabled_check(team);
 918 }
 919
 920 static void team_queue_override_port_del(struct team *team,
 921                                          struct team_port *port)
 922 {
 923         __team_queue_override_port_del(team, port);
 924         __team_queue_override_enabled_check(team);
 925 }
 926
 927
 928 /****************
 929  * Port handling
 930  ****************/
 931
 932 static bool team_port_find(const struct team *team,
 933                            const struct team_port *port)
 934 {
 935         struct team_port *cur;
 936
 937         list_for_each_entry(cur, &team->port_list, list)
 938                 if (cur == port)
 939                         return true;
 940         return false;
 941 }
 942
 943 /*
 944  * Enable/disable port by adding to enabled port hashlist and setting
 945  * port->index (Might be racy so reader could see incorrect ifindex when
 946  * processing a flying packet, but that is not a problem). Write guarded
 947  * by team->lock.
 948  */
 949 static void team_port_enable(struct team *team,
 950                              struct team_port *port)
 951 {
 952         if (team_port_enabled(port))
 953                 return;
 954         port->index = team->en_port_count++;
 955         hlist_add_head_rcu(&port->hlist,
 956                            team_port_index_hash(team, port->index));
 957         team_adjust_ops(team);
 958         team_queue_override_port_add(team, port);
 959         if (team->ops.port_enabled)
 960                 team->ops.port_enabled(team, port);
 961         team_notify_peers(team);
 962         team_mcast_rejoin(team);
 963         team_lower_state_changed(port);
 964 }
 965
 966 static void __reconstruct_port_hlist(struct team *team, int rm_index)
 967 {
 968         int i;
 969         struct team_port *port;
 970
 971         for (i = rm_index + 1; i < team->en_port_count; i++) {
 972                 port = team_get_port_by_index(team, i);
 973                 hlist_del_rcu(&port->hlist);
 974                 port->index--;
 975                 hlist_add_head_rcu(&port->hlist,
 976                                    team_port_index_hash(team, port->index));
 977         }
 978 }
 979
 980 static void team_port_disable(struct team *team,
 981                               struct team_port *port)
 982 {
 983         if (!team_port_enabled(port))
 984                 return;
 985         if (team->ops.port_disabled)
 986                 team->ops.port_disabled(team, port);
 987         hlist_del_rcu(&port->hlist);
 988         __reconstruct_port_hlist(team, port->index);
 989         port->index = -1;
 990         team->en_port_count--;
 991         team_queue_override_port_del(team, port);
 992         team_adjust_ops(team);
 993         team_notify_peers(team);
 994         team_mcast_rejoin(team);
 995         team_lower_state_changed(port);
 996 }
 997
 998 #define TEAM_VLAN_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
 999                             NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
1000                             NETIF_F_HIGHDMA | NETIF_F_LRO)
1001
1002 #define TEAM_ENC_FEATURES       (NETIF_F_HW_CSUM | NETIF_F_SG | \
1003                                  NETIF_F_RXCSUM | NETIF_F_ALL_TSO)
1004
1005 static void __team_compute_features(struct team *team)
1006 {
1007         struct team_port *port;
1008         netdev_features_t vlan_features = TEAM_VLAN_FEATURES &
1009                                           NETIF_F_ALL_FOR_ALL;
1010         netdev_features_t enc_features  = TEAM_ENC_FEATURES;
1011         unsigned short max_hard_header_len = ETH_HLEN;
1012         unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE |
1013                                         IFF_XMIT_DST_RELEASE_PERM;
1014
1015         list_for_each_entry(port, &team->port_list, list) {
1016                 vlan_features = netdev_increment_features(vlan_features,
1017                                         port->dev->vlan_features,
1018                                         TEAM_VLAN_FEATURES);
1019                 enc_features =
1020                         netdev_increment_features(enc_features,
1021                                                   port->dev->hw_enc_features,
1022                                                   TEAM_ENC_FEATURES);
1023
1024
1025                 dst_release_flag &= port->dev->priv_flags;
1026                 if (port->dev->hard_header_len > max_hard_header_len)
1027                         max_hard_header_len = port->dev->hard_header_len;
1028         }
1029
1030         team->dev->vlan_features = vlan_features;
1031         team->dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL |
1032                                      NETIF_F_GSO_UDP_L4;
1033         team->dev->hard_header_len = max_hard_header_len;
1034
1035         team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
1036         if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
1037                 team->dev->priv_flags |= IFF_XMIT_DST_RELEASE;
1038 }
1039
1040 static void team_compute_features(struct team *team)
1041 {
1042         mutex_lock(&team->lock);
1043         __team_compute_features(team);
1044         mutex_unlock(&team->lock);
1045         netdev_change_features(team->dev);
1046 }
1047
1048 static int team_port_enter(struct team *team, struct team_port *port)
1049 {
1050         int err = 0;
1051
1052         dev_hold(team->dev);
1053         if (team->ops.port_enter) {
1054                 err = team->ops.port_enter(team, port);
1055                 if (err) {
1056                         netdev_err(team->dev, "Device %s failed to enter team mode\n",
1057                                    port->dev->name);
1058                         goto err_port_enter;
1059                 }
1060         }
1061
1062         return 0;
1063
1064 err_port_enter:
1065         dev_put(team->dev);
1066
1067         return err;
1068 }
1069
1070 static void team_port_leave(struct team *team, struct team_port *port)
1071 {
1072         if (team->ops.port_leave)
1073                 team->ops.port_leave(team, port);
1074         dev_put(team->dev);
1075 }
1076
1077 #ifdef CONFIG_NET_POLL_CONTROLLER
1078 static int __team_port_enable_netpoll(struct team_port *port)
1079 {
1080         struct netpoll *np;
1081         int err;
1082
1083         np = kzalloc(sizeof(*np), GFP_KERNEL);
1084         if (!np)
1085                 return -ENOMEM;
1086
1087         err = __netpoll_setup(np, port->dev);
1088         if (err) {
1089                 kfree(np);
1090                 return err;
1091         }
1092         port->np = np;
1093         return err;
1094 }
1095
1096 static int team_port_enable_netpoll(struct team_port *port)
1097 {
1098         if (!port->team->dev->npinfo)
1099                 return 0;
1100
1101         return __team_port_enable_netpoll(port);
1102 }
1103
1104 static void team_port_disable_netpoll(struct team_port *port)
1105 {
1106         struct netpoll *np = port->np;
1107
1108         if (!np)
1109                 return;
1110         port->np = NULL;
1111
1112         /* Wait for transmitting packets to finish before freeing. */
1113         synchronize_rcu_bh();
1114         __netpoll_cleanup(np);
1115         kfree(np);
1116 }
1117 #else
1118 static int team_port_enable_netpoll(struct team_port *port)
1119 {
1120         return 0;
1121 }
1122 static void team_port_disable_netpoll(struct team_port *port)
1123 {
1124 }
1125 #endif
1126
1127 static int team_upper_dev_link(struct team *team, struct team_port *port,
1128                                struct netlink_ext_ack *extack)
1129 {
1130         struct netdev_lag_upper_info lag_upper_info;
1131         int err;
1132
1133         lag_upper_info.tx_type = team->mode->lag_tx_type;
1134         lag_upper_info.hash_type = NETDEV_LAG_HASH_UNKNOWN;
1135         err = netdev_master_upper_dev_link(port->dev, team->dev, NULL,
1136                                            &lag_upper_info, extack);
1137         if (err)
1138                 return err;
1139         port->dev->priv_flags |= IFF_TEAM_PORT;
1140         return 0;
1141 }
1142
1143 static void team_upper_dev_unlink(struct team *team, struct team_port *port)
1144 {
1145         netdev_upper_dev_unlink(port->dev, team->dev);
1146         port->dev->priv_flags &= ~IFF_TEAM_PORT;
1147 }
1148
1149 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1150 static int team_dev_type_check_change(struct net_device *dev,
1151                                       struct net_device *port_dev);
1152
1153 static int team_port_add(struct team *team, struct net_device *port_dev,
1154                          struct netlink_ext_ack *extack)
1155 {
1156         struct net_device *dev = team->dev;
1157         struct team_port *port;
1158         char *portname = port_dev->name;
1159         int err;
1160
1161         if (port_dev->flags & IFF_LOOPBACK) {
1162                 NL_SET_ERR_MSG(extack, "Loopback device can't be added as a team port");
1163                 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1164                            portname);
1165                 return -EINVAL;
1166         }
1167
1168         if (team_port_exists(port_dev)) {
1169                 NL_SET_ERR_MSG(extack, "Device is already a port of a team device");
1170                 netdev_err(dev, "Device %s is already a port "
1171                                 "of a team device\n", portname);
1172                 return -EBUSY;
1173         }
1174
1175         if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1176             vlan_uses_dev(dev)) {
1177                 NL_SET_ERR_MSG(extack, "Device is VLAN challenged and team device has VLAN set up");
1178                 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1179                            portname);
1180                 return -EPERM;
1181         }
1182
1183         err = team_dev_type_check_change(dev, port_dev);
1184         if (err)
1185                 return err;
1186
1187         if (port_dev->flags & IFF_UP) {
1188                 NL_SET_ERR_MSG(extack, "Device is up. Set it down before adding it as a team port");
1189                 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1190                            portname);
1191                 return -EBUSY;
1192         }
1193
1194         port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1195                        GFP_KERNEL);
1196         if (!port)
1197                 return -ENOMEM;
1198
1199         port->dev = port_dev;
1200         port->team = team;
1201         INIT_LIST_HEAD(&port->qom_list);
1202
1203         port->orig.mtu = port_dev->mtu;
1204         err = dev_set_mtu(port_dev, dev->mtu);
1205         if (err) {
1206                 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1207                 goto err_set_mtu;
1208         }
1209
1210         memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1211
1212         err = team_port_enter(team, port);
1213         if (err) {
1214                 netdev_err(dev, "Device %s failed to enter team mode\n",
1215                            portname);
1216                 goto err_port_enter;
1217         }
1218
1219         err = dev_open(port_dev);
1220         if (err) {
1221                 netdev_dbg(dev, "Device %s opening failed\n",
1222                            portname);
1223                 goto err_dev_open;
1224         }
1225
1226         err = vlan_vids_add_by_dev(port_dev, dev);
1227         if (err) {
1228                 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1229                                 portname);
1230                 goto err_vids_add;
1231         }
1232
1233         err = team_port_enable_netpoll(port);
1234         if (err) {
1235                 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1236                            portname);
1237                 goto err_enable_netpoll;
1238         }
1239
1240         if (!(dev->features & NETIF_F_LRO))
1241                 dev_disable_lro(port_dev);
1242
1243         err = netdev_rx_handler_register(port_dev, team_handle_frame,
1244                                          port);
1245         if (err) {
1246                 netdev_err(dev, "Device %s failed to register rx_handler\n",
1247                            portname);
1248                 goto err_handler_register;
1249         }
1250
1251         err = team_upper_dev_link(team, port, extack);
1252         if (err) {
1253                 netdev_err(dev, "Device %s failed to set upper link\n",
1254                            portname);
1255                 goto err_set_upper_link;
1256         }
1257
1258         err = __team_option_inst_add_port(team, port);
1259         if (err) {
1260                 netdev_err(dev, "Device %s failed to add per-port options\n",
1261                            portname);
1262                 goto err_option_port_add;
1263         }
1264
1265         netif_addr_lock_bh(dev);
1266         dev_uc_sync_multiple(port_dev, dev);
1267         dev_mc_sync_multiple(port_dev, dev);
1268         netif_addr_unlock_bh(dev);
1269
1270         port->index = -1;
1271         list_add_tail_rcu(&port->list, &team->port_list);
1272         team_port_enable(team, port);
1273         __team_compute_features(team);
1274         __team_port_change_port_added(port, !!netif_carrier_ok(port_dev));
1275         __team_options_change_check(team);
1276
1277         netdev_info(dev, "Port device %s added\n", portname);
1278
1279         return 0;
1280
1281 err_option_port_add:
1282         team_upper_dev_unlink(team, port);
1283
1284 err_set_upper_link:
1285         netdev_rx_handler_unregister(port_dev);
1286
1287 err_handler_register:
1288         team_port_disable_netpoll(port);
1289
1290 err_enable_netpoll:
1291         vlan_vids_del_by_dev(port_dev, dev);
1292
1293 err_vids_add:
1294         dev_close(port_dev);
1295
1296 err_dev_open:
1297         team_port_leave(team, port);
1298         team_port_set_orig_dev_addr(port);
1299
1300 err_port_enter:
1301         dev_set_mtu(port_dev, port->orig.mtu);
1302
1303 err_set_mtu:
1304         kfree(port);
1305
1306         return err;
1307 }
1308
1309 static void __team_port_change_port_removed(struct team_port *port);
1310
1311 static int team_port_del(struct team *team, struct net_device *port_dev)
1312 {
1313         struct net_device *dev = team->dev;
1314         struct team_port *port;
1315         char *portname = port_dev->name;
1316
1317         port = team_port_get_rtnl(port_dev);
1318         if (!port || !team_port_find(team, port)) {
1319                 netdev_err(dev, "Device %s does not act as a port of this team\n",
1320                            portname);
1321                 return -ENOENT;
1322         }
1323
1324         team_port_disable(team, port);
1325         list_del_rcu(&port->list);
1326         team_upper_dev_unlink(team, port);
1327         netdev_rx_handler_unregister(port_dev);
1328         team_port_disable_netpoll(port);
1329         vlan_vids_del_by_dev(port_dev, dev);
1330         dev_uc_unsync(port_dev, dev);
1331         dev_mc_unsync(port_dev, dev);
1332         dev_close(port_dev);
1333         team_port_leave(team, port);
1334
1335         __team_option_inst_mark_removed_port(team, port);
1336         __team_options_change_check(team);
1337         __team_option_inst_del_port(team, port);
1338         __team_port_change_port_removed(port);
1339
1340         team_port_set_orig_dev_addr(port);
1341         dev_set_mtu(port_dev, port->orig.mtu);
1342         kfree_rcu(port, rcu);
1343         netdev_info(dev, "Port device %s removed\n", portname);
1344         __team_compute_features(team);
1345
1346         return 0;
1347 }
1348
1349
1350 /*****************
1351  * Net device ops
1352  *****************/
1353
1354 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1355 {
1356         ctx->data.str_val = team->mode->kind;
1357         return 0;
1358 }
1359
1360 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1361 {
1362         return team_change_mode(team, ctx->data.str_val);
1363 }
1364
1365 static int team_notify_peers_count_get(struct team *team,
1366                                        struct team_gsetter_ctx *ctx)
1367 {
1368         ctx->data.u32_val = team->notify_peers.count;
1369         return 0;
1370 }
1371
1372 static int team_notify_peers_count_set(struct team *team,
1373                                        struct team_gsetter_ctx *ctx)
1374 {
1375         team->notify_peers.count = ctx->data.u32_val;
1376         return 0;
1377 }
1378
1379 static int team_notify_peers_interval_get(struct team *team,
1380                                           struct team_gsetter_ctx *ctx)
1381 {
1382         ctx->data.u32_val = team->notify_peers.interval;
1383         return 0;
1384 }
1385
1386 static int team_notify_peers_interval_set(struct team *team,
1387                                           struct team_gsetter_ctx *ctx)
1388 {
1389         team->notify_peers.interval = ctx->data.u32_val;
1390         return 0;
1391 }
1392
1393 static int team_mcast_rejoin_count_get(struct team *team,
1394                                        struct team_gsetter_ctx *ctx)
1395 {
1396         ctx->data.u32_val = team->mcast_rejoin.count;
1397         return 0;
1398 }
1399
1400 static int team_mcast_rejoin_count_set(struct team *team,
1401                                        struct team_gsetter_ctx *ctx)
1402 {
1403         team->mcast_rejoin.count = ctx->data.u32_val;
1404         return 0;
1405 }
1406
1407 static int team_mcast_rejoin_interval_get(struct team *team,
1408                                           struct team_gsetter_ctx *ctx)
1409 {
1410         ctx->data.u32_val = team->mcast_rejoin.interval;
1411         return 0;
1412 }
1413
1414 static int team_mcast_rejoin_interval_set(struct team *team,
1415                                           struct team_gsetter_ctx *ctx)
1416 {
1417         team->mcast_rejoin.interval = ctx->data.u32_val;
1418         return 0;
1419 }
1420
1421 static int team_port_en_option_get(struct team *team,
1422                                    struct team_gsetter_ctx *ctx)
1423 {
1424         struct team_port *port = ctx->info->port;
1425
1426         ctx->data.bool_val = team_port_enabled(port);
1427         return 0;
1428 }
1429
1430 static int team_port_en_option_set(struct team *team,
1431                                    struct team_gsetter_ctx *ctx)
1432 {
1433         struct team_port *port = ctx->info->port;
1434
1435         if (ctx->data.bool_val)
1436                 team_port_enable(team, port);
1437         else
1438                 team_port_disable(team, port);
1439         return 0;
1440 }
1441
1442 static int team_user_linkup_option_get(struct team *team,
1443                                        struct team_gsetter_ctx *ctx)
1444 {
1445         struct team_port *port = ctx->info->port;
1446
1447         ctx->data.bool_val = port->user.linkup;
1448         return 0;
1449 }
1450
1451 static void __team_carrier_check(struct team *team);
1452
1453 static int team_user_linkup_option_set(struct team *team,
1454                                        struct team_gsetter_ctx *ctx)
1455 {
1456         struct team_port *port = ctx->info->port;
1457
1458         port->user.linkup = ctx->data.bool_val;
1459         team_refresh_port_linkup(port);
1460         __team_carrier_check(port->team);
1461         return 0;
1462 }
1463
1464 static int team_user_linkup_en_option_get(struct team *team,
1465                                           struct team_gsetter_ctx *ctx)
1466 {
1467         struct team_port *port = ctx->info->port;
1468
1469         ctx->data.bool_val = port->user.linkup_enabled;
1470         return 0;
1471 }
1472
1473 static int team_user_linkup_en_option_set(struct team *team,
1474                                           struct team_gsetter_ctx *ctx)
1475 {
1476         struct team_port *port = ctx->info->port;
1477
1478         port->user.linkup_enabled = ctx->data.bool_val;
1479         team_refresh_port_linkup(port);
1480         __team_carrier_check(port->team);
1481         return 0;
1482 }
1483
1484 static int team_priority_option_get(struct team *team,
1485                                     struct team_gsetter_ctx *ctx)
1486 {
1487         struct team_port *port = ctx->info->port;
1488
1489         ctx->data.s32_val = port->priority;
1490         return 0;
1491 }
1492
1493 static int team_priority_option_set(struct team *team,
1494                                     struct team_gsetter_ctx *ctx)
1495 {
1496         struct team_port *port = ctx->info->port;
1497         s32 priority = ctx->data.s32_val;
1498
1499         if (port->priority == priority)
1500                 return 0;
1501         port->priority = priority;
1502         team_queue_override_port_prio_changed(team, port);
1503         return 0;
1504 }
1505
1506 static int team_queue_id_option_get(struct team *team,
1507                                     struct team_gsetter_ctx *ctx)
1508 {
1509         struct team_port *port = ctx->info->port;
1510
1511         ctx->data.u32_val = port->queue_id;
1512         return 0;
1513 }
1514
1515 static int team_queue_id_option_set(struct team *team,
1516                                     struct team_gsetter_ctx *ctx)
1517 {
1518         struct team_port *port = ctx->info->port;
1519         u16 new_queue_id = ctx->data.u32_val;
1520
1521         if (port->queue_id == new_queue_id)
1522                 return 0;
1523         if (new_queue_id >= team->dev->real_num_tx_queues)
1524                 return -EINVAL;
1525         team_queue_override_port_change_queue_id(team, port, new_queue_id);
1526         return 0;
1527 }
1528
1529 static const struct team_option team_options[] = {
1530         {
1531                 .name = "mode",
1532                 .type = TEAM_OPTION_TYPE_STRING,
1533                 .getter = team_mode_option_get,
1534                 .setter = team_mode_option_set,
1535         },
1536         {
1537                 .name = "notify_peers_count",
1538                 .type = TEAM_OPTION_TYPE_U32,
1539                 .getter = team_notify_peers_count_get,
1540                 .setter = team_notify_peers_count_set,
1541         },
1542         {
1543                 .name = "notify_peers_interval",
1544                 .type = TEAM_OPTION_TYPE_U32,
1545                 .getter = team_notify_peers_interval_get,
1546                 .setter = team_notify_peers_interval_set,
1547         },
1548         {
1549                 .name = "mcast_rejoin_count",
1550                 .type = TEAM_OPTION_TYPE_U32,
1551                 .getter = team_mcast_rejoin_count_get,
1552                 .setter = team_mcast_rejoin_count_set,
1553         },
1554         {
1555                 .name = "mcast_rejoin_interval",
1556                 .type = TEAM_OPTION_TYPE_U32,
1557                 .getter = team_mcast_rejoin_interval_get,
1558                 .setter = team_mcast_rejoin_interval_set,
1559         },
1560         {
1561                 .name = "enabled",
1562                 .type = TEAM_OPTION_TYPE_BOOL,
1563                 .per_port = true,
1564                 .getter = team_port_en_option_get,
1565                 .setter = team_port_en_option_set,
1566         },
1567         {
1568                 .name = "user_linkup",
1569                 .type = TEAM_OPTION_TYPE_BOOL,
1570                 .per_port = true,
1571                 .getter = team_user_linkup_option_get,
1572                 .setter = team_user_linkup_option_set,
1573         },
1574         {
1575                 .name = "user_linkup_enabled",
1576                 .type = TEAM_OPTION_TYPE_BOOL,
1577                 .per_port = true,
1578                 .getter = team_user_linkup_en_option_get,
1579                 .setter = team_user_linkup_en_option_set,
1580         },
1581         {
1582                 .name = "priority",
1583                 .type = TEAM_OPTION_TYPE_S32,
1584                 .per_port = true,
1585                 .getter = team_priority_option_get,
1586                 .setter = team_priority_option_set,
1587         },
1588         {
1589                 .name = "queue_id",
1590                 .type = TEAM_OPTION_TYPE_U32,
1591                 .per_port = true,
1592                 .getter = team_queue_id_option_get,
1593                 .setter = team_queue_id_option_set,
1594         },
1595 };
1596
1597
1598 static int team_init(struct net_device *dev)
1599 {
1600         struct team *team = netdev_priv(dev);
1601         int i;
1602         int err;
1603
1604         team->dev = dev;
1605         mutex_init(&team->lock);
1606         team_set_no_mode(team);
1607
1608         team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1609         if (!team->pcpu_stats)
1610                 return -ENOMEM;
1611
1612         for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1613                 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1614         INIT_LIST_HEAD(&team->port_list);
1615         err = team_queue_override_init(team);
1616         if (err)
1617                 goto err_team_queue_override_init;
1618
1619         team_adjust_ops(team);
1620
1621         INIT_LIST_HEAD(&team->option_list);
1622         INIT_LIST_HEAD(&team->option_inst_list);
1623
1624         team_notify_peers_init(team);
1625         team_mcast_rejoin_init(team);
1626
1627         err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1628         if (err)
1629                 goto err_options_register;
1630         netif_carrier_off(dev);
1631
1632         netdev_lockdep_set_classes(dev);
1633
1634         return 0;
1635
1636 err_options_register:
1637         team_mcast_rejoin_fini(team);
1638         team_notify_peers_fini(team);
1639         team_queue_override_fini(team);
1640 err_team_queue_override_init:
1641         free_percpu(team->pcpu_stats);
1642
1643         return err;
1644 }
1645
1646 static void team_uninit(struct net_device *dev)
1647 {
1648         struct team *team = netdev_priv(dev);
1649         struct team_port *port;
1650         struct team_port *tmp;
1651
1652         mutex_lock(&team->lock);
1653         list_for_each_entry_safe(port, tmp, &team->port_list, list)
1654                 team_port_del(team, port->dev);
1655
1656         __team_change_mode(team, NULL); /* cleanup */
1657         __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1658         team_mcast_rejoin_fini(team);
1659         team_notify_peers_fini(team);
1660         team_queue_override_fini(team);
1661         mutex_unlock(&team->lock);
1662         netdev_change_features(dev);
1663 }
1664
1665 static void team_destructor(struct net_device *dev)
1666 {
1667         struct team *team = netdev_priv(dev);
1668
1669         free_percpu(team->pcpu_stats);
1670 }
1671
1672 static int team_open(struct net_device *dev)
1673 {
1674         return 0;
1675 }
1676
1677 static int team_close(struct net_device *dev)
1678 {
1679         return 0;
1680 }
1681
1682 /*
1683  * note: already called with rcu_read_lock
1684  */
1685 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1686 {
1687         struct team *team = netdev_priv(dev);
1688         bool tx_success;
1689         unsigned int len = skb->len;
1690
1691         tx_success = team_queue_override_transmit(team, skb);
1692         if (!tx_success)
1693                 tx_success = team->ops.transmit(team, skb);
1694         if (tx_success) {
1695                 struct team_pcpu_stats *pcpu_stats;
1696
1697                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1698                 u64_stats_update_begin(&pcpu_stats->syncp);
1699                 pcpu_stats->tx_packets++;
1700                 pcpu_stats->tx_bytes += len;
1701                 u64_stats_update_end(&pcpu_stats->syncp);
1702         } else {
1703                 this_cpu_inc(team->pcpu_stats->tx_dropped);
1704         }
1705
1706         return NETDEV_TX_OK;
1707 }
1708
1709 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1710                              void *accel_priv, select_queue_fallback_t fallback)
1711 {
1712         /*
1713          * This helper function exists to help dev_pick_tx get the correct
1714          * destination queue.  Using a helper function skips a call to
1715          * skb_tx_hash and will put the skbs in the queue we expect on their
1716          * way down to the team driver.
1717          */
1718         u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1719
1720         /*
1721          * Save the original txq to restore before passing to the driver
1722          */
1723         qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1724
1725         if (unlikely(txq >= dev->real_num_tx_queues)) {
1726                 do {
1727                         txq -= dev->real_num_tx_queues;
1728                 } while (txq >= dev->real_num_tx_queues);
1729         }
1730         return txq;
1731 }
1732
1733 static void team_change_rx_flags(struct net_device *dev, int change)
1734 {
1735         struct team *team = netdev_priv(dev);
1736         struct team_port *port;
1737         int inc;
1738
1739         rcu_read_lock();
1740         list_for_each_entry_rcu(port, &team->port_list, list) {
1741                 if (change & IFF_PROMISC) {
1742                         inc = dev->flags & IFF_PROMISC ? 1 : -1;
1743                         dev_set_promiscuity(port->dev, inc);
1744                 }
1745                 if (change & IFF_ALLMULTI) {
1746                         inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1747                         dev_set_allmulti(port->dev, inc);
1748                 }
1749         }
1750         rcu_read_unlock();
1751 }
1752
1753 static void team_set_rx_mode(struct net_device *dev)
1754 {
1755         struct team *team = netdev_priv(dev);
1756         struct team_port *port;
1757
1758         rcu_read_lock();
1759         list_for_each_entry_rcu(port, &team->port_list, list) {
1760                 dev_uc_sync_multiple(port->dev, dev);
1761                 dev_mc_sync_multiple(port->dev, dev);
1762         }
1763         rcu_read_unlock();
1764 }
1765
1766 static int team_set_mac_address(struct net_device *dev, void *p)
1767 {
1768         struct sockaddr *addr = p;
1769         struct team *team = netdev_priv(dev);
1770         struct team_port *port;
1771
1772         if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1773                 return -EADDRNOTAVAIL;
1774         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1775         mutex_lock(&team->lock);
1776         list_for_each_entry(port, &team->port_list, list)
1777                 if (team->ops.port_change_dev_addr)
1778                         team->ops.port_change_dev_addr(team, port);
1779         mutex_unlock(&team->lock);
1780         return 0;
1781 }
1782
1783 static int team_change_mtu(struct net_device *dev, int new_mtu)
1784 {
1785         struct team *team = netdev_priv(dev);
1786         struct team_port *port;
1787         int err;
1788
1789         /*
1790          * Alhough this is reader, it's guarded by team lock. It's not possible
1791          * to traverse list in reverse under rcu_read_lock
1792          */
1793         mutex_lock(&team->lock);
1794         team->port_mtu_change_allowed = true;
1795         list_for_each_entry(port, &team->port_list, list) {
1796                 err = dev_set_mtu(port->dev, new_mtu);
1797                 if (err) {
1798                         netdev_err(dev, "Device %s failed to change mtu",
1799                                    port->dev->name);
1800                         goto unwind;
1801                 }
1802         }
1803         team->port_mtu_change_allowed = false;
1804         mutex_unlock(&team->lock);
1805
1806         dev->mtu = new_mtu;
1807
1808         return 0;
1809
1810 unwind:
1811         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1812                 dev_set_mtu(port->dev, dev->mtu);
1813         team->port_mtu_change_allowed = false;
1814         mutex_unlock(&team->lock);
1815
1816         return err;
1817 }
1818
1819 static void
1820 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1821 {
1822         struct team *team = netdev_priv(dev);
1823         struct team_pcpu_stats *p;
1824         u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1825         u32 rx_dropped = 0, tx_dropped = 0, rx_nohandler = 0;
1826         unsigned int start;
1827         int i;
1828
1829         for_each_possible_cpu(i) {
1830                 p = per_cpu_ptr(team->pcpu_stats, i);
1831                 do {
1832                         start = u64_stats_fetch_begin_irq(&p->syncp);
1833                         rx_packets      = p->rx_packets;
1834                         rx_bytes        = p->rx_bytes;
1835                         rx_multicast    = p->rx_multicast;
1836                         tx_packets      = p->tx_packets;
1837                         tx_bytes        = p->tx_bytes;
1838                 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
1839
1840                 stats->rx_packets       += rx_packets;
1841                 stats->rx_bytes         += rx_bytes;
1842                 stats->multicast        += rx_multicast;
1843                 stats->tx_packets       += tx_packets;
1844                 stats->tx_bytes         += tx_bytes;
1845                 /*
1846                  * rx_dropped, tx_dropped & rx_nohandler are u32,
1847                  * updated without syncp protection.
1848                  */
1849                 rx_dropped      += p->rx_dropped;
1850                 tx_dropped      += p->tx_dropped;
1851                 rx_nohandler    += p->rx_nohandler;
1852         }
1853         stats->rx_dropped       = rx_dropped;
1854         stats->tx_dropped       = tx_dropped;
1855         stats->rx_nohandler     = rx_nohandler;
1856 }
1857
1858 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1859 {
1860         struct team *team = netdev_priv(dev);
1861         struct team_port *port;
1862         int err;
1863
1864         /*
1865          * Alhough this is reader, it's guarded by team lock. It's not possible
1866          * to traverse list in reverse under rcu_read_lock
1867          */
1868         mutex_lock(&team->lock);
1869         list_for_each_entry(port, &team->port_list, list) {
1870                 err = vlan_vid_add(port->dev, proto, vid);
1871                 if (err)
1872                         goto unwind;
1873         }
1874         mutex_unlock(&team->lock);
1875
1876         return 0;
1877
1878 unwind:
1879         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1880                 vlan_vid_del(port->dev, proto, vid);
1881         mutex_unlock(&team->lock);
1882
1883         return err;
1884 }
1885
1886 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1887 {
1888         struct team *team = netdev_priv(dev);
1889         struct team_port *port;
1890
1891         mutex_lock(&team->lock);
1892         list_for_each_entry(port, &team->port_list, list)
1893                 vlan_vid_del(port->dev, proto, vid);
1894         mutex_unlock(&team->lock);
1895
1896         return 0;
1897 }
1898
1899 #ifdef CONFIG_NET_POLL_CONTROLLER
1900 static void team_poll_controller(struct net_device *dev)
1901 {
1902 }
1903
1904 static void __team_netpoll_cleanup(struct team *team)
1905 {
1906         struct team_port *port;
1907
1908         list_for_each_entry(port, &team->port_list, list)
1909                 team_port_disable_netpoll(port);
1910 }
1911
1912 static void team_netpoll_cleanup(struct net_device *dev)
1913 {
1914         struct team *team = netdev_priv(dev);
1915
1916         mutex_lock(&team->lock);
1917         __team_netpoll_cleanup(team);
1918         mutex_unlock(&team->lock);
1919 }
1920
1921 static int team_netpoll_setup(struct net_device *dev,
1922                               struct netpoll_info *npifo)
1923 {
1924         struct team *team = netdev_priv(dev);
1925         struct team_port *port;
1926         int err = 0;
1927
1928         mutex_lock(&team->lock);
1929         list_for_each_entry(port, &team->port_list, list) {
1930                 err = __team_port_enable_netpoll(port);
1931                 if (err) {
1932                         __team_netpoll_cleanup(team);
1933                         break;
1934                 }
1935         }
1936         mutex_unlock(&team->lock);
1937         return err;
1938 }
1939 #endif
1940
1941 static int team_add_slave(struct net_device *dev, struct net_device *port_dev,
1942                           struct netlink_ext_ack *extack)
1943 {
1944         struct team *team = netdev_priv(dev);
1945         int err;
1946
1947         mutex_lock(&team->lock);
1948         err = team_port_add(team, port_dev, extack);
1949         mutex_unlock(&team->lock);
1950
1951         if (!err)
1952                 netdev_change_features(dev);
1953
1954         return err;
1955 }
1956
1957 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1958 {
1959         struct team *team = netdev_priv(dev);
1960         int err;
1961
1962         mutex_lock(&team->lock);
1963         err = team_port_del(team, port_dev);
1964         mutex_unlock(&team->lock);
1965
1966         if (!err)
1967                 netdev_change_features(dev);
1968
1969         return err;
1970 }
1971
1972 static netdev_features_t team_fix_features(struct net_device *dev,
1973                                            netdev_features_t features)
1974 {
1975         struct team_port *port;
1976         struct team *team = netdev_priv(dev);
1977         netdev_features_t mask;
1978
1979         mask = features;
1980         features &= ~NETIF_F_ONE_FOR_ALL;
1981         features |= NETIF_F_ALL_FOR_ALL;
1982
1983         rcu_read_lock();
1984         list_for_each_entry_rcu(port, &team->port_list, list) {
1985                 features = netdev_increment_features(features,
1986                                                      port->dev->features,
1987                                                      mask);
1988         }
1989         rcu_read_unlock();
1990
1991         features = netdev_add_tso_features(features, mask);
1992
1993         return features;
1994 }
1995
1996 static int team_change_carrier(struct net_device *dev, bool new_carrier)
1997 {
1998         struct team *team = netdev_priv(dev);
1999
2000         team->user_carrier_enabled = true;
2001
2002         if (new_carrier)
2003                 netif_carrier_on(dev);
2004         else
2005                 netif_carrier_off(dev);
2006         return 0;
2007 }
2008
2009 static const struct net_device_ops team_netdev_ops = {
2010         .ndo_init               = team_init,
2011         .ndo_uninit             = team_uninit,
2012         .ndo_open               = team_open,
2013         .ndo_stop               = team_close,
2014         .ndo_start_xmit         = team_xmit,
2015         .ndo_select_queue       = team_select_queue,
2016         .ndo_change_rx_flags    = team_change_rx_flags,
2017         .ndo_set_rx_mode        = team_set_rx_mode,
2018         .ndo_set_mac_address    = team_set_mac_address,
2019         .ndo_change_mtu         = team_change_mtu,
2020         .ndo_get_stats64        = team_get_stats64,
2021         .ndo_vlan_rx_add_vid    = team_vlan_rx_add_vid,
2022         .ndo_vlan_rx_kill_vid   = team_vlan_rx_kill_vid,
2023 #ifdef CONFIG_NET_POLL_CONTROLLER
2024         .ndo_poll_controller    = team_poll_controller,
2025         .ndo_netpoll_setup      = team_netpoll_setup,
2026         .ndo_netpoll_cleanup    = team_netpoll_cleanup,
2027 #endif
2028         .ndo_add_slave          = team_add_slave,
2029         .ndo_del_slave          = team_del_slave,
2030         .ndo_fix_features       = team_fix_features,
2031         .ndo_change_carrier     = team_change_carrier,
2032         .ndo_features_check     = passthru_features_check,
2033 };
2034
2035 /***********************
2036  * ethtool interface
2037  ***********************/
2038
2039 static void team_ethtool_get_drvinfo(struct net_device *dev,
2040                                      struct ethtool_drvinfo *drvinfo)
2041 {
2042         strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
2043         strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2044 }
2045
2046 static const struct ethtool_ops team_ethtool_ops = {
2047         .get_drvinfo            = team_ethtool_get_drvinfo,
2048         .get_link               = ethtool_op_get_link,
2049 };
2050
2051 /***********************
2052  * rt netlink interface
2053  ***********************/
2054
2055 static void team_setup_by_port(struct net_device *dev,
2056                                struct net_device *port_dev)
2057 {
2058         dev->header_ops = port_dev->header_ops;
2059         dev->type = port_dev->type;
2060         dev->hard_header_len = port_dev->hard_header_len;
2061         dev->addr_len = port_dev->addr_len;
2062         dev->mtu = port_dev->mtu;
2063         memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2064         eth_hw_addr_inherit(dev, port_dev);
2065 }
2066
2067 static int team_dev_type_check_change(struct net_device *dev,
2068                                       struct net_device *port_dev)
2069 {
2070         struct team *team = netdev_priv(dev);
2071         char *portname = port_dev->name;
2072         int err;
2073
2074         if (dev->type == port_dev->type)
2075                 return 0;
2076         if (!list_empty(&team->port_list)) {
2077                 netdev_err(dev, "Device %s is of different type\n", portname);
2078                 return -EBUSY;
2079         }
2080         err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2081         err = notifier_to_errno(err);
2082         if (err) {
2083                 netdev_err(dev, "Refused to change device type\n");
2084                 return err;
2085         }
2086         dev_uc_flush(dev);
2087         dev_mc_flush(dev);
2088         team_setup_by_port(dev, port_dev);
2089         call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2090         return 0;
2091 }
2092
2093 static void team_setup(struct net_device *dev)
2094 {
2095         ether_setup(dev);
2096         dev->max_mtu = ETH_MAX_MTU;
2097
2098         dev->netdev_ops = &team_netdev_ops;
2099         dev->ethtool_ops = &team_ethtool_ops;
2100         dev->needs_free_netdev = true;
2101         dev->priv_destructor = team_destructor;
2102         dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2103         dev->priv_flags |= IFF_NO_QUEUE;
2104         dev->priv_flags |= IFF_TEAM;
2105
2106         /*
2107          * Indicate we support unicast address filtering. That way core won't
2108          * bring us to promisc mode in case a unicast addr is added.
2109          * Let this up to underlay drivers.
2110          */
2111         dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2112
2113         dev->features |= NETIF_F_LLTX;
2114         dev->features |= NETIF_F_GRO;
2115
2116         /* Don't allow team devices to change network namespaces. */
2117         dev->features |= NETIF_F_NETNS_LOCAL;
2118
2119         dev->hw_features = TEAM_VLAN_FEATURES |
2120                            NETIF_F_HW_VLAN_CTAG_TX |
2121                            NETIF_F_HW_VLAN_CTAG_RX |
2122                            NETIF_F_HW_VLAN_CTAG_FILTER;
2123
2124         dev->hw_features |= NETIF_F_GSO_ENCAP_ALL | NETIF_F_GSO_UDP_L4;
2125         dev->features |= dev->hw_features;
2126 }
2127
2128 static int team_newlink(struct net *src_net, struct net_device *dev,
2129                         struct nlattr *tb[], struct nlattr *data[],
2130                         struct netlink_ext_ack *extack)
2131 {
2132         if (tb[IFLA_ADDRESS] == NULL)
2133                 eth_hw_addr_random(dev);
2134
2135         return register_netdevice(dev);
2136 }
2137
2138 static int team_validate(struct nlattr *tb[], struct nlattr *data[],
2139                          struct netlink_ext_ack *extack)
2140 {
2141         if (tb[IFLA_ADDRESS]) {
2142                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2143                         return -EINVAL;
2144                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2145                         return -EADDRNOTAVAIL;
2146         }
2147         return 0;
2148 }
2149
2150 static unsigned int team_get_num_tx_queues(void)
2151 {
2152         return TEAM_DEFAULT_NUM_TX_QUEUES;
2153 }
2154
2155 static unsigned int team_get_num_rx_queues(void)
2156 {
2157         return TEAM_DEFAULT_NUM_RX_QUEUES;
2158 }
2159
2160 static struct rtnl_link_ops team_link_ops __read_mostly = {
2161         .kind                   = DRV_NAME,
2162         .priv_size              = sizeof(struct team),
2163         .setup                  = team_setup,
2164         .newlink                = team_newlink,
2165         .validate               = team_validate,
2166         .get_num_tx_queues      = team_get_num_tx_queues,
2167         .get_num_rx_queues      = team_get_num_rx_queues,
2168 };
2169
2170
2171 /***********************************
2172  * Generic netlink custom interface
2173  ***********************************/
2174
2175 static struct genl_family team_nl_family;
2176
2177 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2178         [TEAM_ATTR_UNSPEC]                      = { .type = NLA_UNSPEC, },
2179         [TEAM_ATTR_TEAM_IFINDEX]                = { .type = NLA_U32 },
2180         [TEAM_ATTR_LIST_OPTION]                 = { .type = NLA_NESTED },
2181         [TEAM_ATTR_LIST_PORT]                   = { .type = NLA_NESTED },
2182 };
2183
2184 static const struct nla_policy
2185 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2186         [TEAM_ATTR_OPTION_UNSPEC]               = { .type = NLA_UNSPEC, },
2187         [TEAM_ATTR_OPTION_NAME] = {
2188                 .type = NLA_STRING,
2189                 .len = TEAM_STRING_MAX_LEN,
2190         },
2191         [TEAM_ATTR_OPTION_CHANGED]              = { .type = NLA_FLAG },
2192         [TEAM_ATTR_OPTION_TYPE]                 = { .type = NLA_U8 },
2193         [TEAM_ATTR_OPTION_DATA]                 = { .type = NLA_BINARY },
2194 };
2195
2196 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2197 {
2198         struct sk_buff *msg;
2199         void *hdr;
2200         int err;
2201
2202         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2203         if (!msg)
2204                 return -ENOMEM;
2205
2206         hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2207                           &team_nl_family, 0, TEAM_CMD_NOOP);
2208         if (!hdr) {
2209                 err = -EMSGSIZE;
2210                 goto err_msg_put;
2211         }
2212
2213         genlmsg_end(msg, hdr);
2214
2215         return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2216
2217 err_msg_put:
2218         nlmsg_free(msg);
2219
2220         return err;
2221 }
2222
2223 /*
2224  * Netlink cmd functions should be locked by following two functions.
2225  * Since dev gets held here, that ensures dev won't disappear in between.
2226  */
2227 static struct team *team_nl_team_get(struct genl_info *info)
2228 {
2229         struct net *net = genl_info_net(info);
2230         int ifindex;
2231         struct net_device *dev;
2232         struct team *team;
2233
2234         if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2235                 return NULL;
2236
2237         ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2238         dev = dev_get_by_index(net, ifindex);
2239         if (!dev || dev->netdev_ops != &team_netdev_ops) {
2240                 if (dev)
2241                         dev_put(dev);
2242                 return NULL;
2243         }
2244
2245         team = netdev_priv(dev);
2246         mutex_lock(&team->lock);
2247         return team;
2248 }
2249
2250 static void team_nl_team_put(struct team *team)
2251 {
2252         mutex_unlock(&team->lock);
2253         dev_put(team->dev);
2254 }
2255
2256 typedef int team_nl_send_func_t(struct sk_buff *skb,
2257                                 struct team *team, u32 portid);
2258
2259 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2260 {
2261         return genlmsg_unicast(dev_net(team->dev), skb, portid);
2262 }
2263
2264 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2265                                        struct team_option_inst *opt_inst)
2266 {
2267         struct nlattr *option_item;
2268         struct team_option *option = opt_inst->option;
2269         struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2270         struct team_gsetter_ctx ctx;
2271         int err;
2272
2273         ctx.info = opt_inst_info;
2274         err = team_option_get(team, opt_inst, &ctx);
2275         if (err)
2276                 return err;
2277
2278         option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
2279         if (!option_item)
2280                 return -EMSGSIZE;
2281
2282         if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2283                 goto nest_cancel;
2284         if (opt_inst_info->port &&
2285             nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2286                         opt_inst_info->port->dev->ifindex))
2287                 goto nest_cancel;
2288         if (opt_inst->option->array_size &&
2289             nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2290                         opt_inst_info->array_index))
2291                 goto nest_cancel;
2292
2293         switch (option->type) {
2294         case TEAM_OPTION_TYPE_U32:
2295                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2296                         goto nest_cancel;
2297                 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2298                         goto nest_cancel;
2299                 break;
2300         case TEAM_OPTION_TYPE_STRING:
2301                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2302                         goto nest_cancel;
2303                 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2304                                    ctx.data.str_val))
2305                         goto nest_cancel;
2306                 break;
2307         case TEAM_OPTION_TYPE_BINARY:
2308                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2309                         goto nest_cancel;
2310                 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2311                             ctx.data.bin_val.ptr))
2312                         goto nest_cancel;
2313                 break;
2314         case TEAM_OPTION_TYPE_BOOL:
2315                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2316                         goto nest_cancel;
2317                 if (ctx.data.bool_val &&
2318                     nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2319                         goto nest_cancel;
2320                 break;
2321         case TEAM_OPTION_TYPE_S32:
2322                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2323                         goto nest_cancel;
2324                 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2325                         goto nest_cancel;
2326                 break;
2327         default:
2328                 BUG();
2329         }
2330         if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2331                 goto nest_cancel;
2332         if (opt_inst->changed) {
2333                 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2334                         goto nest_cancel;
2335                 opt_inst->changed = false;
2336         }
2337         nla_nest_end(skb, option_item);
2338         return 0;
2339
2340 nest_cancel:
2341         nla_nest_cancel(skb, option_item);
2342         return -EMSGSIZE;
2343 }
2344
2345 static int __send_and_alloc_skb(struct sk_buff **pskb,
2346                                 struct team *team, u32 portid,
2347                                 team_nl_send_func_t *send_func)
2348 {
2349         int err;
2350
2351         if (*pskb) {
2352                 err = send_func(*pskb, team, portid);
2353                 if (err)
2354                         return err;
2355         }
2356         *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2357         if (!*pskb)
2358                 return -ENOMEM;
2359         return 0;
2360 }
2361
2362 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2363                                     int flags, team_nl_send_func_t *send_func,
2364                                     struct list_head *sel_opt_inst_list)
2365 {
2366         struct nlattr *option_list;
2367         struct nlmsghdr *nlh;
2368         void *hdr;
2369         struct team_option_inst *opt_inst;
2370         int err;
2371         struct sk_buff *skb = NULL;
2372         bool incomplete;
2373         int i;
2374
2375         opt_inst = list_first_entry(sel_opt_inst_list,
2376                                     struct team_option_inst, tmp_list);
2377
2378 start_again:
2379         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2380         if (err)
2381                 return err;
2382
2383         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2384                           TEAM_CMD_OPTIONS_GET);
2385         if (!hdr) {
2386                 nlmsg_free(skb);
2387                 return -EMSGSIZE;
2388         }
2389
2390         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2391                 goto nla_put_failure;
2392         option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2393         if (!option_list)
2394                 goto nla_put_failure;
2395
2396         i = 0;
2397         incomplete = false;
2398         list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2399                 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2400                 if (err) {
2401                         if (err == -EMSGSIZE) {
2402                                 if (!i)
2403                                         goto errout;
2404                                 incomplete = true;
2405                                 break;
2406                         }
2407                         goto errout;
2408                 }
2409                 i++;
2410         }
2411
2412         nla_nest_end(skb, option_list);
2413         genlmsg_end(skb, hdr);
2414         if (incomplete)
2415                 goto start_again;
2416
2417 send_done:
2418         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2419         if (!nlh) {
2420                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2421                 if (err)
2422                         return err;
2423                 goto send_done;
2424         }
2425
2426         return send_func(skb, team, portid);
2427
2428 nla_put_failure:
2429         err = -EMSGSIZE;
2430 errout:
2431         nlmsg_free(skb);
2432         return err;
2433 }
2434
2435 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2436 {
2437         struct team *team;
2438         struct team_option_inst *opt_inst;
2439         int err;
2440         LIST_HEAD(sel_opt_inst_list);
2441
2442         team = team_nl_team_get(info);
2443         if (!team)
2444                 return -EINVAL;
2445
2446         list_for_each_entry(opt_inst, &team->option_inst_list, list)
2447                 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2448         err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2449                                        NLM_F_ACK, team_nl_send_unicast,
2450                                        &sel_opt_inst_list);
2451
2452         team_nl_team_put(team);
2453
2454         return err;
2455 }
2456
2457 static int team_nl_send_event_options_get(struct team *team,
2458                                           struct list_head *sel_opt_inst_list);
2459
2460 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2461 {
2462         struct team *team;
2463         int err = 0;
2464         int i;
2465         struct nlattr *nl_option;
2466         LIST_HEAD(opt_inst_list);
2467
2468         rtnl_lock();
2469
2470         team = team_nl_team_get(info);
2471         if (!team) {
2472                 err = -EINVAL;
2473                 goto rtnl_unlock;
2474         }
2475
2476         err = -EINVAL;
2477         if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2478                 err = -EINVAL;
2479                 goto team_put;
2480         }
2481
2482         nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2483                 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2484                 struct nlattr *attr;
2485                 struct nlattr *attr_data;
2486                 enum team_option_type opt_type;
2487                 int opt_port_ifindex = 0; /* != 0 for per-port options */
2488                 u32 opt_array_index = 0;
2489                 bool opt_is_array = false;
2490                 struct team_option_inst *opt_inst;
2491                 char *opt_name;
2492                 bool opt_found = false;
2493
2494                 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2495                         err = -EINVAL;
2496                         goto team_put;
2497                 }
2498                 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2499                                        nl_option, team_nl_option_policy,
2500                                        info->extack);
2501                 if (err)
2502                         goto team_put;
2503                 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2504                     !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2505                         err = -EINVAL;
2506                         goto team_put;
2507                 }
2508                 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2509                 case NLA_U32:
2510                         opt_type = TEAM_OPTION_TYPE_U32;
2511                         break;
2512                 case NLA_STRING:
2513                         opt_type = TEAM_OPTION_TYPE_STRING;
2514                         break;
2515                 case NLA_BINARY:
2516                         opt_type = TEAM_OPTION_TYPE_BINARY;
2517                         break;
2518                 case NLA_FLAG:
2519                         opt_type = TEAM_OPTION_TYPE_BOOL;
2520                         break;
2521                 case NLA_S32:
2522                         opt_type = TEAM_OPTION_TYPE_S32;
2523                         break;
2524                 default:
2525                         goto team_put;
2526                 }
2527
2528                 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2529                 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2530                         err = -EINVAL;
2531                         goto team_put;
2532                 }
2533
2534                 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2535                 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2536                 if (attr)
2537                         opt_port_ifindex = nla_get_u32(attr);
2538
2539                 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2540                 if (attr) {
2541                         opt_is_array = true;
2542                         opt_array_index = nla_get_u32(attr);
2543                 }
2544
2545                 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2546                         struct team_option *option = opt_inst->option;
2547                         struct team_gsetter_ctx ctx;
2548                         struct team_option_inst_info *opt_inst_info;
2549                         int tmp_ifindex;
2550
2551                         opt_inst_info = &opt_inst->info;
2552                         tmp_ifindex = opt_inst_info->port ?
2553                                       opt_inst_info->port->dev->ifindex : 0;
2554                         if (option->type != opt_type ||
2555                             strcmp(option->name, opt_name) ||
2556                             tmp_ifindex != opt_port_ifindex ||
2557                             (option->array_size && !opt_is_array) ||
2558                             opt_inst_info->array_index != opt_array_index)
2559                                 continue;
2560                         opt_found = true;
2561                         ctx.info = opt_inst_info;
2562                         switch (opt_type) {
2563                         case TEAM_OPTION_TYPE_U32:
2564                                 ctx.data.u32_val = nla_get_u32(attr_data);
2565                                 break;
2566                         case TEAM_OPTION_TYPE_STRING:
2567                                 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2568                                         err = -EINVAL;
2569                                         goto team_put;
2570                                 }
2571                                 ctx.data.str_val = nla_data(attr_data);
2572                                 break;
2573                         case TEAM_OPTION_TYPE_BINARY:
2574                                 ctx.data.bin_val.len = nla_len(attr_data);
2575                                 ctx.data.bin_val.ptr = nla_data(attr_data);
2576                                 break;
2577                         case TEAM_OPTION_TYPE_BOOL:
2578                                 ctx.data.bool_val = attr_data ? true : false;
2579                                 break;
2580                         case TEAM_OPTION_TYPE_S32:
2581                                 ctx.data.s32_val = nla_get_s32(attr_data);
2582                                 break;
2583                         default:
2584                                 BUG();
2585                         }
2586                         err = team_option_set(team, opt_inst, &ctx);
2587                         if (err)
2588                                 goto team_put;
2589                         opt_inst->changed = true;
2590
2591                         /* dumb/evil user-space can send us duplicate opt,
2592                          * keep only the last one
2593                          */
2594                         if (__team_option_inst_tmp_find(&opt_inst_list,
2595                                                         opt_inst))
2596                                 continue;
2597
2598                         list_add(&opt_inst->tmp_list, &opt_inst_list);
2599                 }
2600                 if (!opt_found) {
2601                         err = -ENOENT;
2602                         goto team_put;
2603                 }
2604         }
2605
2606         err = team_nl_send_event_options_get(team, &opt_inst_list);
2607
2608 team_put:
2609         team_nl_team_put(team);
2610 rtnl_unlock:
2611         rtnl_unlock();
2612         return err;
2613 }
2614
2615 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2616                                      struct team_port *port)
2617 {
2618         struct nlattr *port_item;
2619
2620         port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2621         if (!port_item)
2622                 goto nest_cancel;
2623         if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2624                 goto nest_cancel;
2625         if (port->changed) {
2626                 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2627                         goto nest_cancel;
2628                 port->changed = false;
2629         }
2630         if ((port->removed &&
2631              nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2632             (port->state.linkup &&
2633              nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2634             nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2635             nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2636                 goto nest_cancel;
2637         nla_nest_end(skb, port_item);
2638         return 0;
2639
2640 nest_cancel:
2641         nla_nest_cancel(skb, port_item);
2642         return -EMSGSIZE;
2643 }
2644
2645 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2646                                       int flags, team_nl_send_func_t *send_func,
2647                                       struct team_port *one_port)
2648 {
2649         struct nlattr *port_list;
2650         struct nlmsghdr *nlh;
2651         void *hdr;
2652         struct team_port *port;
2653         int err;
2654         struct sk_buff *skb = NULL;
2655         bool incomplete;
2656         int i;
2657
2658         port = list_first_entry_or_null(&team->port_list,
2659                                         struct team_port, list);
2660
2661 start_again:
2662         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2663         if (err)
2664                 return err;
2665
2666         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2667                           TEAM_CMD_PORT_LIST_GET);
2668         if (!hdr) {
2669                 nlmsg_free(skb);
2670                 return -EMSGSIZE;
2671         }
2672
2673         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2674                 goto nla_put_failure;
2675         port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2676         if (!port_list)
2677                 goto nla_put_failure;
2678
2679         i = 0;
2680         incomplete = false;
2681
2682         /* If one port is selected, called wants to send port list containing
2683          * only this port. Otherwise go through all listed ports and send all
2684          */
2685         if (one_port) {
2686                 err = team_nl_fill_one_port_get(skb, one_port);
2687                 if (err)
2688                         goto errout;
2689         } else if (port) {
2690                 list_for_each_entry_from(port, &team->port_list, list) {
2691                         err = team_nl_fill_one_port_get(skb, port);
2692                         if (err) {
2693                                 if (err == -EMSGSIZE) {
2694                                         if (!i)
2695                                                 goto errout;
2696                                         incomplete = true;
2697                                         break;
2698                                 }
2699                                 goto errout;
2700                         }
2701                         i++;
2702                 }
2703         }
2704
2705         nla_nest_end(skb, port_list);
2706         genlmsg_end(skb, hdr);
2707         if (incomplete)
2708                 goto start_again;
2709
2710 send_done:
2711         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2712         if (!nlh) {
2713                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2714                 if (err)
2715                         return err;
2716                 goto send_done;
2717         }
2718
2719         return send_func(skb, team, portid);
2720
2721 nla_put_failure:
2722         err = -EMSGSIZE;
2723 errout:
2724         nlmsg_free(skb);
2725         return err;
2726 }
2727
2728 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2729                                      struct genl_info *info)
2730 {
2731         struct team *team;
2732         int err;
2733
2734         team = team_nl_team_get(info);
2735         if (!team)
2736                 return -EINVAL;
2737
2738         err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2739                                          NLM_F_ACK, team_nl_send_unicast, NULL);
2740
2741         team_nl_team_put(team);
2742
2743         return err;
2744 }
2745
2746 static const struct genl_ops team_nl_ops[] = {
2747         {
2748                 .cmd = TEAM_CMD_NOOP,
2749                 .doit = team_nl_cmd_noop,
2750                 .policy = team_nl_policy,
2751         },
2752         {
2753                 .cmd = TEAM_CMD_OPTIONS_SET,
2754                 .doit = team_nl_cmd_options_set,
2755                 .policy = team_nl_policy,
2756                 .flags = GENL_ADMIN_PERM,
2757         },
2758         {
2759                 .cmd = TEAM_CMD_OPTIONS_GET,
2760                 .doit = team_nl_cmd_options_get,
2761                 .policy = team_nl_policy,
2762                 .flags = GENL_ADMIN_PERM,
2763         },
2764         {
2765                 .cmd = TEAM_CMD_PORT_LIST_GET,
2766                 .doit = team_nl_cmd_port_list_get,
2767                 .policy = team_nl_policy,
2768                 .flags = GENL_ADMIN_PERM,
2769         },
2770 };
2771
2772 static const struct genl_multicast_group team_nl_mcgrps[] = {
2773         { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2774 };
2775
2776 static struct genl_family team_nl_family __ro_after_init = {
2777         .name           = TEAM_GENL_NAME,
2778         .version        = TEAM_GENL_VERSION,
2779         .maxattr        = TEAM_ATTR_MAX,
2780         .netnsok        = true,
2781         .module         = THIS_MODULE,
2782         .ops            = team_nl_ops,
2783         .n_ops          = ARRAY_SIZE(team_nl_ops),
2784         .mcgrps         = team_nl_mcgrps,
2785         .n_mcgrps       = ARRAY_SIZE(team_nl_mcgrps),
2786 };
2787
2788 static int team_nl_send_multicast(struct sk_buff *skb,
2789                                   struct team *team, u32 portid)
2790 {
2791         return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2792                                        skb, 0, 0, GFP_KERNEL);
2793 }
2794
2795 static int team_nl_send_event_options_get(struct team *team,
2796                                           struct list_head *sel_opt_inst_list)
2797 {
2798         return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2799                                         sel_opt_inst_list);
2800 }
2801
2802 static int team_nl_send_event_port_get(struct team *team,
2803                                        struct team_port *port)
2804 {
2805         return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2806                                           port);
2807 }
2808
2809 static int __init team_nl_init(void)
2810 {
2811         return genl_register_family(&team_nl_family);
2812 }
2813
2814 static void team_nl_fini(void)
2815 {
2816         genl_unregister_family(&team_nl_family);
2817 }
2818
2819
2820 /******************
2821  * Change checkers
2822  ******************/
2823
2824 static void __team_options_change_check(struct team *team)
2825 {
2826         int err;
2827         struct team_option_inst *opt_inst;
2828         LIST_HEAD(sel_opt_inst_list);
2829
2830         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2831                 if (opt_inst->changed)
2832                         list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2833         }
2834         err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2835         if (err && err != -ESRCH)
2836                 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2837                             err);
2838 }
2839
2840 /* rtnl lock is held */
2841
2842 static void __team_port_change_send(struct team_port *port, bool linkup)
2843 {
2844         int err;
2845
2846         port->changed = true;
2847         port->state.linkup = linkup;
2848         team_refresh_port_linkup(port);
2849         if (linkup) {
2850                 struct ethtool_link_ksettings ecmd;
2851
2852                 err = __ethtool_get_link_ksettings(port->dev, &ecmd);
2853                 if (!err) {
2854                         port->state.speed = ecmd.base.speed;
2855                         port->state.duplex = ecmd.base.duplex;
2856                         goto send_event;
2857                 }
2858         }
2859         port->state.speed = 0;
2860         port->state.duplex = 0;
2861
2862 send_event:
2863         err = team_nl_send_event_port_get(port->team, port);
2864         if (err && err != -ESRCH)
2865                 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2866                             port->dev->name, err);
2867
2868 }
2869
2870 static void __team_carrier_check(struct team *team)
2871 {
2872         struct team_port *port;
2873         bool team_linkup;
2874
2875         if (team->user_carrier_enabled)
2876                 return;
2877
2878         team_linkup = false;
2879         list_for_each_entry(port, &team->port_list, list) {
2880                 if (port->linkup) {
2881                         team_linkup = true;
2882                         break;
2883                 }
2884         }
2885
2886         if (team_linkup)
2887                 netif_carrier_on(team->dev);
2888         else
2889                 netif_carrier_off(team->dev);
2890 }
2891
2892 static void __team_port_change_check(struct team_port *port, bool linkup)
2893 {
2894         if (port->state.linkup != linkup)
2895                 __team_port_change_send(port, linkup);
2896         __team_carrier_check(port->team);
2897 }
2898
2899 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2900 {
2901         __team_port_change_send(port, linkup);
2902         __team_carrier_check(port->team);
2903 }
2904
2905 static void __team_port_change_port_removed(struct team_port *port)
2906 {
2907         port->removed = true;
2908         __team_port_change_send(port, false);
2909         __team_carrier_check(port->team);
2910 }
2911
2912 static void team_port_change_check(struct team_port *port, bool linkup)
2913 {
2914         struct team *team = port->team;
2915
2916         mutex_lock(&team->lock);
2917         __team_port_change_check(port, linkup);
2918         mutex_unlock(&team->lock);
2919 }
2920
2921
2922 /************************************
2923  * Net device notifier event handler
2924  ************************************/
2925
2926 static int team_device_event(struct notifier_block *unused,
2927                              unsigned long event, void *ptr)
2928 {
2929         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2930         struct team_port *port;
2931
2932         port = team_port_get_rtnl(dev);
2933         if (!port)
2934                 return NOTIFY_DONE;
2935
2936         switch (event) {
2937         case NETDEV_UP:
2938                 if (netif_carrier_ok(dev))
2939                         team_port_change_check(port, true);
2940                 break;
2941         case NETDEV_DOWN:
2942                 team_port_change_check(port, false);
2943                 break;
2944         case NETDEV_CHANGE:
2945                 if (netif_running(port->dev))
2946                         team_port_change_check(port,
2947                                                !!netif_oper_up(port->dev));
2948                 break;
2949         case NETDEV_UNREGISTER:
2950                 team_del_slave(port->team->dev, dev);
2951                 break;
2952         case NETDEV_FEAT_CHANGE:
2953                 team_compute_features(port->team);
2954                 break;
2955         case NETDEV_PRECHANGEMTU:
2956                 /* Forbid to change mtu of underlaying device */
2957                 if (!port->team->port_mtu_change_allowed)
2958                         return NOTIFY_BAD;
2959                 break;
2960         case NETDEV_PRE_TYPE_CHANGE:
2961                 /* Forbid to change type of underlaying device */
2962                 return NOTIFY_BAD;
2963         case NETDEV_RESEND_IGMP:
2964                 /* Propagate to master device */
2965                 call_netdevice_notifiers(event, port->team->dev);
2966                 break;
2967         }
2968         return NOTIFY_DONE;
2969 }
2970
2971 static struct notifier_block team_notifier_block __read_mostly = {
2972         .notifier_call = team_device_event,
2973 };
2974
2975
2976 /***********************
2977  * Module init and exit
2978  ***********************/
2979
2980 static int __init team_module_init(void)
2981 {
2982         int err;
2983
2984         register_netdevice_notifier(&team_notifier_block);
2985
2986         err = rtnl_link_register(&team_link_ops);
2987         if (err)
2988                 goto err_rtnl_reg;
2989
2990         err = team_nl_init();
2991         if (err)
2992                 goto err_nl_init;
2993
2994         return 0;
2995
2996 err_nl_init:
2997         rtnl_link_unregister(&team_link_ops);
2998
2999 err_rtnl_reg:
3000         unregister_netdevice_notifier(&team_notifier_block);
3001
3002         return err;
3003 }
3004
3005 static void __exit team_module_exit(void)
3006 {
3007         team_nl_fini();
3008         rtnl_link_unregister(&team_link_ops);
3009         unregister_netdevice_notifier(&team_notifier_block);
3010 }
3011
3012 module_init(team_module_init);
3013 module_exit(team_module_exit);
3014
3015 MODULE_LICENSE("GPL v2");
3016 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
3017 MODULE_DESCRIPTION("Ethernet team device driver");
3018 MODULE_ALIAS_RTNL_LINK(DRV_NAME);