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 = kzalloc(sizeof(struct team_option *) * option_count,
 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(sizeof(struct list_head) * queue_cnt, GFP_KERNEL);
 795         if (!listarr)
 796                 return -ENOMEM;
 797         team->qom_lists = listarr;
 798         for (i = 0; i < queue_cnt; i++)
 799                 INIT_LIST_HEAD(listarr++);
 800         return 0;
 801 }
 802
 803 static void team_queue_override_fini(struct team *team)
 804 {
 805         kfree(team->qom_lists);
 806 }
 807
 808 static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
 809 {
 810         return &team->qom_lists[queue_id - 1];
 811 }
 812
 813 /*
 814  * note: already called with rcu_read_lock
 815  */
 816 static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
 817 {
 818         struct list_head *qom_list;
 819         struct team_port *port;
 820
 821         if (!team->queue_override_enabled || !skb->queue_mapping)
 822                 return false;
 823         qom_list = __team_get_qom_list(team, skb->queue_mapping);
 824         list_for_each_entry_rcu(port, qom_list, qom_list) {
 825                 if (!team_dev_queue_xmit(team, port, skb))
 826                         return true;
 827         }
 828         return false;
 829 }
 830
 831 static void __team_queue_override_port_del(struct team *team,
 832                                            struct team_port *port)
 833 {
 834         if (!port->queue_id)
 835                 return;
 836         list_del_rcu(&port->qom_list);
 837 }
 838
 839 static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
 840                                                       struct team_port *cur)
 841 {
 842         if (port->priority < cur->priority)
 843                 return true;
 844         if (port->priority > cur->priority)
 845                 return false;
 846         if (port->index < cur->index)
 847                 return true;
 848         return false;
 849 }
 850
 851 static void __team_queue_override_port_add(struct team *team,
 852                                            struct team_port *port)
 853 {
 854         struct team_port *cur;
 855         struct list_head *qom_list;
 856         struct list_head *node;
 857
 858         if (!port->queue_id)
 859                 return;
 860         qom_list = __team_get_qom_list(team, port->queue_id);
 861         node = qom_list;
 862         list_for_each_entry(cur, qom_list, qom_list) {
 863                 if (team_queue_override_port_has_gt_prio_than(port, cur))
 864                         break;
 865                 node = &cur->qom_list;
 866         }
 867         list_add_tail_rcu(&port->qom_list, node);
 868 }
 869
 870 static void __team_queue_override_enabled_check(struct team *team)
 871 {
 872         struct team_port *port;
 873         bool enabled = false;
 874
 875         list_for_each_entry(port, &team->port_list, list) {
 876                 if (port->queue_id) {
 877                         enabled = true;
 878                         break;
 879                 }
 880         }
 881         if (enabled == team->queue_override_enabled)
 882                 return;
 883         netdev_dbg(team->dev, "%s queue override\n",
 884                    enabled ? "Enabling" : "Disabling");
 885         team->queue_override_enabled = enabled;
 886 }
 887
 888 static void team_queue_override_port_prio_changed(struct team *team,
 889                                                   struct team_port *port)
 890 {
 891         if (!port->queue_id || team_port_enabled(port))
 892                 return;
 893         __team_queue_override_port_del(team, port);
 894         __team_queue_override_port_add(team, port);
 895         __team_queue_override_enabled_check(team);
 896 }
 897
 898 static void team_queue_override_port_change_queue_id(struct team *team,
 899                                                      struct team_port *port,
 900                                                      u16 new_queue_id)
 901 {
 902         if (team_port_enabled(port)) {
 903                 __team_queue_override_port_del(team, port);
 904                 port->queue_id = new_queue_id;
 905                 __team_queue_override_port_add(team, port);
 906                 __team_queue_override_enabled_check(team);
 907         } else {
 908                 port->queue_id = new_queue_id;
 909         }
 910 }
 911
 912 static void team_queue_override_port_add(struct team *team,
 913                                          struct team_port *port)
 914 {
 915         __team_queue_override_port_add(team, port);
 916         __team_queue_override_enabled_check(team);
 917 }
 918
 919 static void team_queue_override_port_del(struct team *team,
 920                                          struct team_port *port)
 921 {
 922         __team_queue_override_port_del(team, port);
 923         __team_queue_override_enabled_check(team);
 924 }
 925
 926
 927 /****************
 928  * Port handling
 929  ****************/
 930
 931 static bool team_port_find(const struct team *team,
 932                            const struct team_port *port)
 933 {
 934         struct team_port *cur;
 935
 936         list_for_each_entry(cur, &team->port_list, list)
 937                 if (cur == port)
 938                         return true;
 939         return false;
 940 }
 941
 942 /*
 943  * Enable/disable port by adding to enabled port hashlist and setting
 944  * port->index (Might be racy so reader could see incorrect ifindex when
 945  * processing a flying packet, but that is not a problem). Write guarded
 946  * by team->lock.
 947  */
 948 static void team_port_enable(struct team *team,
 949                              struct team_port *port)
 950 {
 951         if (team_port_enabled(port))
 952                 return;
 953         port->index = team->en_port_count++;
 954         hlist_add_head_rcu(&port->hlist,
 955                            team_port_index_hash(team, port->index));
 956         team_adjust_ops(team);
 957         team_queue_override_port_add(team, port);
 958         if (team->ops.port_enabled)
 959                 team->ops.port_enabled(team, port);
 960         team_notify_peers(team);
 961         team_mcast_rejoin(team);
 962         team_lower_state_changed(port);
 963 }
 964
 965 static void __reconstruct_port_hlist(struct team *team, int rm_index)
 966 {
 967         int i;
 968         struct team_port *port;
 969
 970         for (i = rm_index + 1; i < team->en_port_count; i++) {
 971                 port = team_get_port_by_index(team, i);
 972                 hlist_del_rcu(&port->hlist);
 973                 port->index--;
 974                 hlist_add_head_rcu(&port->hlist,
 975                                    team_port_index_hash(team, port->index));
 976         }
 977 }
 978
 979 static void team_port_disable(struct team *team,
 980                               struct team_port *port)
 981 {
 982         if (!team_port_enabled(port))
 983                 return;
 984         if (team->ops.port_disabled)
 985                 team->ops.port_disabled(team, port);
 986         hlist_del_rcu(&port->hlist);
 987         __reconstruct_port_hlist(team, port->index);
 988         port->index = -1;
 989         team->en_port_count--;
 990         team_queue_override_port_del(team, port);
 991         team_adjust_ops(team);
 992         team_notify_peers(team);
 993         team_mcast_rejoin(team);
 994         team_lower_state_changed(port);
 995 }
 996
 997 #define TEAM_VLAN_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
 998                             NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
 999                             NETIF_F_HIGHDMA | NETIF_F_LRO)
1000
1001 #define TEAM_ENC_FEATURES       (NETIF_F_HW_CSUM | NETIF_F_SG | \
1002                                  NETIF_F_RXCSUM | NETIF_F_ALL_TSO)
1003
1004 static void __team_compute_features(struct team *team)
1005 {
1006         struct team_port *port;
1007         u32 vlan_features = TEAM_VLAN_FEATURES & NETIF_F_ALL_FOR_ALL;
1008         netdev_features_t enc_features  = TEAM_ENC_FEATURES;
1009         unsigned short max_hard_header_len = ETH_HLEN;
1010         unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE |
1011                                         IFF_XMIT_DST_RELEASE_PERM;
1012
1013         list_for_each_entry(port, &team->port_list, list) {
1014                 vlan_features = netdev_increment_features(vlan_features,
1015                                         port->dev->vlan_features,
1016                                         TEAM_VLAN_FEATURES);
1017                 enc_features =
1018                         netdev_increment_features(enc_features,
1019                                                   port->dev->hw_enc_features,
1020                                                   TEAM_ENC_FEATURES);
1021
1022
1023                 dst_release_flag &= port->dev->priv_flags;
1024                 if (port->dev->hard_header_len > max_hard_header_len)
1025                         max_hard_header_len = port->dev->hard_header_len;
1026         }
1027
1028         team->dev->vlan_features = vlan_features;
1029         team->dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL;
1030         team->dev->hard_header_len = max_hard_header_len;
1031
1032         team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
1033         if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
1034                 team->dev->priv_flags |= IFF_XMIT_DST_RELEASE;
1035 }
1036
1037 static void team_compute_features(struct team *team)
1038 {
1039         mutex_lock(&team->lock);
1040         __team_compute_features(team);
1041         mutex_unlock(&team->lock);
1042         netdev_change_features(team->dev);
1043 }
1044
1045 static int team_port_enter(struct team *team, struct team_port *port)
1046 {
1047         int err = 0;
1048
1049         dev_hold(team->dev);
1050         if (team->ops.port_enter) {
1051                 err = team->ops.port_enter(team, port);
1052                 if (err) {
1053                         netdev_err(team->dev, "Device %s failed to enter team mode\n",
1054                                    port->dev->name);
1055                         goto err_port_enter;
1056                 }
1057         }
1058
1059         return 0;
1060
1061 err_port_enter:
1062         dev_put(team->dev);
1063
1064         return err;
1065 }
1066
1067 static void team_port_leave(struct team *team, struct team_port *port)
1068 {
1069         if (team->ops.port_leave)
1070                 team->ops.port_leave(team, port);
1071         dev_put(team->dev);
1072 }
1073
1074 #ifdef CONFIG_NET_POLL_CONTROLLER
1075 static int __team_port_enable_netpoll(struct team_port *port)
1076 {
1077         struct netpoll *np;
1078         int err;
1079
1080         np = kzalloc(sizeof(*np), GFP_KERNEL);
1081         if (!np)
1082                 return -ENOMEM;
1083
1084         err = __netpoll_setup(np, port->dev);
1085         if (err) {
1086                 kfree(np);
1087                 return err;
1088         }
1089         port->np = np;
1090         return err;
1091 }
1092
1093 static int team_port_enable_netpoll(struct team_port *port)
1094 {
1095         if (!port->team->dev->npinfo)
1096                 return 0;
1097
1098         return __team_port_enable_netpoll(port);
1099 }
1100
1101 static void team_port_disable_netpoll(struct team_port *port)
1102 {
1103         struct netpoll *np = port->np;
1104
1105         if (!np)
1106                 return;
1107         port->np = NULL;
1108
1109         /* Wait for transmitting packets to finish before freeing. */
1110         synchronize_rcu_bh();
1111         __netpoll_cleanup(np);
1112         kfree(np);
1113 }
1114 #else
1115 static int team_port_enable_netpoll(struct team_port *port)
1116 {
1117         return 0;
1118 }
1119 static void team_port_disable_netpoll(struct team_port *port)
1120 {
1121 }
1122 #endif
1123
1124 static int team_upper_dev_link(struct team *team, struct team_port *port,
1125                                struct netlink_ext_ack *extack)
1126 {
1127         struct netdev_lag_upper_info lag_upper_info;
1128         int err;
1129
1130         lag_upper_info.tx_type = team->mode->lag_tx_type;
1131         err = netdev_master_upper_dev_link(port->dev, team->dev, NULL,
1132                                            &lag_upper_info, extack);
1133         if (err)
1134                 return err;
1135         port->dev->priv_flags |= IFF_TEAM_PORT;
1136         return 0;
1137 }
1138
1139 static void team_upper_dev_unlink(struct team *team, struct team_port *port)
1140 {
1141         netdev_upper_dev_unlink(port->dev, team->dev);
1142         port->dev->priv_flags &= ~IFF_TEAM_PORT;
1143 }
1144
1145 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1146 static int team_dev_type_check_change(struct net_device *dev,
1147                                       struct net_device *port_dev);
1148
1149 static int team_port_add(struct team *team, struct net_device *port_dev,
1150                          struct netlink_ext_ack *extack)
1151 {
1152         struct net_device *dev = team->dev;
1153         struct team_port *port;
1154         char *portname = port_dev->name;
1155         int err;
1156
1157         if (port_dev->flags & IFF_LOOPBACK) {
1158                 NL_SET_ERR_MSG(extack, "Loopback device can't be added as a team port");
1159                 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1160                            portname);
1161                 return -EINVAL;
1162         }
1163
1164         if (team_port_exists(port_dev)) {
1165                 NL_SET_ERR_MSG(extack, "Device is already a port of a team device");
1166                 netdev_err(dev, "Device %s is already a port "
1167                                 "of a team device\n", portname);
1168                 return -EBUSY;
1169         }
1170
1171         if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1172             vlan_uses_dev(dev)) {
1173                 NL_SET_ERR_MSG(extack, "Device is VLAN challenged and team device has VLAN set up");
1174                 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1175                            portname);
1176                 return -EPERM;
1177         }
1178
1179         err = team_dev_type_check_change(dev, port_dev);
1180         if (err)
1181                 return err;
1182
1183         if (port_dev->flags & IFF_UP) {
1184                 NL_SET_ERR_MSG(extack, "Device is up. Set it down before adding it as a team port");
1185                 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1186                            portname);
1187                 return -EBUSY;
1188         }
1189
1190         port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1191                        GFP_KERNEL);
1192         if (!port)
1193                 return -ENOMEM;
1194
1195         port->dev = port_dev;
1196         port->team = team;
1197         INIT_LIST_HEAD(&port->qom_list);
1198
1199         port->orig.mtu = port_dev->mtu;
1200         err = dev_set_mtu(port_dev, dev->mtu);
1201         if (err) {
1202                 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1203                 goto err_set_mtu;
1204         }
1205
1206         memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1207
1208         err = team_port_enter(team, port);
1209         if (err) {
1210                 netdev_err(dev, "Device %s failed to enter team mode\n",
1211                            portname);
1212                 goto err_port_enter;
1213         }
1214
1215         err = dev_open(port_dev);
1216         if (err) {
1217                 netdev_dbg(dev, "Device %s opening failed\n",
1218                            portname);
1219                 goto err_dev_open;
1220         }
1221
1222         err = vlan_vids_add_by_dev(port_dev, dev);
1223         if (err) {
1224                 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1225                                 portname);
1226                 goto err_vids_add;
1227         }
1228
1229         err = team_port_enable_netpoll(port);
1230         if (err) {
1231                 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1232                            portname);
1233                 goto err_enable_netpoll;
1234         }
1235
1236         if (!(dev->features & NETIF_F_LRO))
1237                 dev_disable_lro(port_dev);
1238
1239         err = netdev_rx_handler_register(port_dev, team_handle_frame,
1240                                          port);
1241         if (err) {
1242                 netdev_err(dev, "Device %s failed to register rx_handler\n",
1243                            portname);
1244                 goto err_handler_register;
1245         }
1246
1247         err = team_upper_dev_link(team, port, extack);
1248         if (err) {
1249                 netdev_err(dev, "Device %s failed to set upper link\n",
1250                            portname);
1251                 goto err_set_upper_link;
1252         }
1253
1254         err = __team_option_inst_add_port(team, port);
1255         if (err) {
1256                 netdev_err(dev, "Device %s failed to add per-port options\n",
1257                            portname);
1258                 goto err_option_port_add;
1259         }
1260
1261         netif_addr_lock_bh(dev);
1262         dev_uc_sync_multiple(port_dev, dev);
1263         dev_mc_sync_multiple(port_dev, dev);
1264         netif_addr_unlock_bh(dev);
1265
1266         port->index = -1;
1267         list_add_tail_rcu(&port->list, &team->port_list);
1268         team_port_enable(team, port);
1269         __team_compute_features(team);
1270         __team_port_change_port_added(port, !!netif_carrier_ok(port_dev));
1271         __team_options_change_check(team);
1272
1273         netdev_info(dev, "Port device %s added\n", portname);
1274
1275         return 0;
1276
1277 err_option_port_add:
1278         team_upper_dev_unlink(team, port);
1279
1280 err_set_upper_link:
1281         netdev_rx_handler_unregister(port_dev);
1282
1283 err_handler_register:
1284         team_port_disable_netpoll(port);
1285
1286 err_enable_netpoll:
1287         vlan_vids_del_by_dev(port_dev, dev);
1288
1289 err_vids_add:
1290         dev_close(port_dev);
1291
1292 err_dev_open:
1293         team_port_leave(team, port);
1294         team_port_set_orig_dev_addr(port);
1295
1296 err_port_enter:
1297         dev_set_mtu(port_dev, port->orig.mtu);
1298
1299 err_set_mtu:
1300         kfree(port);
1301
1302         return err;
1303 }
1304
1305 static void __team_port_change_port_removed(struct team_port *port);
1306
1307 static int team_port_del(struct team *team, struct net_device *port_dev)
1308 {
1309         struct net_device *dev = team->dev;
1310         struct team_port *port;
1311         char *portname = port_dev->name;
1312
1313         port = team_port_get_rtnl(port_dev);
1314         if (!port || !team_port_find(team, port)) {
1315                 netdev_err(dev, "Device %s does not act as a port of this team\n",
1316                            portname);
1317                 return -ENOENT;
1318         }
1319
1320         team_port_disable(team, port);
1321         list_del_rcu(&port->list);
1322         team_upper_dev_unlink(team, port);
1323         netdev_rx_handler_unregister(port_dev);
1324         team_port_disable_netpoll(port);
1325         vlan_vids_del_by_dev(port_dev, dev);
1326         dev_uc_unsync(port_dev, dev);
1327         dev_mc_unsync(port_dev, dev);
1328         dev_close(port_dev);
1329         team_port_leave(team, port);
1330
1331         __team_option_inst_mark_removed_port(team, port);
1332         __team_options_change_check(team);
1333         __team_option_inst_del_port(team, port);
1334         __team_port_change_port_removed(port);
1335
1336         team_port_set_orig_dev_addr(port);
1337         dev_set_mtu(port_dev, port->orig.mtu);
1338         kfree_rcu(port, rcu);
1339         netdev_info(dev, "Port device %s removed\n", portname);
1340         __team_compute_features(team);
1341
1342         return 0;
1343 }
1344
1345
1346 /*****************
1347  * Net device ops
1348  *****************/
1349
1350 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1351 {
1352         ctx->data.str_val = team->mode->kind;
1353         return 0;
1354 }
1355
1356 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1357 {
1358         return team_change_mode(team, ctx->data.str_val);
1359 }
1360
1361 static int team_notify_peers_count_get(struct team *team,
1362                                        struct team_gsetter_ctx *ctx)
1363 {
1364         ctx->data.u32_val = team->notify_peers.count;
1365         return 0;
1366 }
1367
1368 static int team_notify_peers_count_set(struct team *team,
1369                                        struct team_gsetter_ctx *ctx)
1370 {
1371         team->notify_peers.count = ctx->data.u32_val;
1372         return 0;
1373 }
1374
1375 static int team_notify_peers_interval_get(struct team *team,
1376                                           struct team_gsetter_ctx *ctx)
1377 {
1378         ctx->data.u32_val = team->notify_peers.interval;
1379         return 0;
1380 }
1381
1382 static int team_notify_peers_interval_set(struct team *team,
1383                                           struct team_gsetter_ctx *ctx)
1384 {
1385         team->notify_peers.interval = ctx->data.u32_val;
1386         return 0;
1387 }
1388
1389 static int team_mcast_rejoin_count_get(struct team *team,
1390                                        struct team_gsetter_ctx *ctx)
1391 {
1392         ctx->data.u32_val = team->mcast_rejoin.count;
1393         return 0;
1394 }
1395
1396 static int team_mcast_rejoin_count_set(struct team *team,
1397                                        struct team_gsetter_ctx *ctx)
1398 {
1399         team->mcast_rejoin.count = ctx->data.u32_val;
1400         return 0;
1401 }
1402
1403 static int team_mcast_rejoin_interval_get(struct team *team,
1404                                           struct team_gsetter_ctx *ctx)
1405 {
1406         ctx->data.u32_val = team->mcast_rejoin.interval;
1407         return 0;
1408 }
1409
1410 static int team_mcast_rejoin_interval_set(struct team *team,
1411                                           struct team_gsetter_ctx *ctx)
1412 {
1413         team->mcast_rejoin.interval = ctx->data.u32_val;
1414         return 0;
1415 }
1416
1417 static int team_port_en_option_get(struct team *team,
1418                                    struct team_gsetter_ctx *ctx)
1419 {
1420         struct team_port *port = ctx->info->port;
1421
1422         ctx->data.bool_val = team_port_enabled(port);
1423         return 0;
1424 }
1425
1426 static int team_port_en_option_set(struct team *team,
1427                                    struct team_gsetter_ctx *ctx)
1428 {
1429         struct team_port *port = ctx->info->port;
1430
1431         if (ctx->data.bool_val)
1432                 team_port_enable(team, port);
1433         else
1434                 team_port_disable(team, port);
1435         return 0;
1436 }
1437
1438 static int team_user_linkup_option_get(struct team *team,
1439                                        struct team_gsetter_ctx *ctx)
1440 {
1441         struct team_port *port = ctx->info->port;
1442
1443         ctx->data.bool_val = port->user.linkup;
1444         return 0;
1445 }
1446
1447 static void __team_carrier_check(struct team *team);
1448
1449 static int team_user_linkup_option_set(struct team *team,
1450                                        struct team_gsetter_ctx *ctx)
1451 {
1452         struct team_port *port = ctx->info->port;
1453
1454         port->user.linkup = ctx->data.bool_val;
1455         team_refresh_port_linkup(port);
1456         __team_carrier_check(port->team);
1457         return 0;
1458 }
1459
1460 static int team_user_linkup_en_option_get(struct team *team,
1461                                           struct team_gsetter_ctx *ctx)
1462 {
1463         struct team_port *port = ctx->info->port;
1464
1465         ctx->data.bool_val = port->user.linkup_enabled;
1466         return 0;
1467 }
1468
1469 static int team_user_linkup_en_option_set(struct team *team,
1470                                           struct team_gsetter_ctx *ctx)
1471 {
1472         struct team_port *port = ctx->info->port;
1473
1474         port->user.linkup_enabled = ctx->data.bool_val;
1475         team_refresh_port_linkup(port);
1476         __team_carrier_check(port->team);
1477         return 0;
1478 }
1479
1480 static int team_priority_option_get(struct team *team,
1481                                     struct team_gsetter_ctx *ctx)
1482 {
1483         struct team_port *port = ctx->info->port;
1484
1485         ctx->data.s32_val = port->priority;
1486         return 0;
1487 }
1488
1489 static int team_priority_option_set(struct team *team,
1490                                     struct team_gsetter_ctx *ctx)
1491 {
1492         struct team_port *port = ctx->info->port;
1493         s32 priority = ctx->data.s32_val;
1494
1495         if (port->priority == priority)
1496                 return 0;
1497         port->priority = priority;
1498         team_queue_override_port_prio_changed(team, port);
1499         return 0;
1500 }
1501
1502 static int team_queue_id_option_get(struct team *team,
1503                                     struct team_gsetter_ctx *ctx)
1504 {
1505         struct team_port *port = ctx->info->port;
1506
1507         ctx->data.u32_val = port->queue_id;
1508         return 0;
1509 }
1510
1511 static int team_queue_id_option_set(struct team *team,
1512                                     struct team_gsetter_ctx *ctx)
1513 {
1514         struct team_port *port = ctx->info->port;
1515         u16 new_queue_id = ctx->data.u32_val;
1516
1517         if (port->queue_id == new_queue_id)
1518                 return 0;
1519         if (new_queue_id >= team->dev->real_num_tx_queues)
1520                 return -EINVAL;
1521         team_queue_override_port_change_queue_id(team, port, new_queue_id);
1522         return 0;
1523 }
1524
1525 static const struct team_option team_options[] = {
1526         {
1527                 .name = "mode",
1528                 .type = TEAM_OPTION_TYPE_STRING,
1529                 .getter = team_mode_option_get,
1530                 .setter = team_mode_option_set,
1531         },
1532         {
1533                 .name = "notify_peers_count",
1534                 .type = TEAM_OPTION_TYPE_U32,
1535                 .getter = team_notify_peers_count_get,
1536                 .setter = team_notify_peers_count_set,
1537         },
1538         {
1539                 .name = "notify_peers_interval",
1540                 .type = TEAM_OPTION_TYPE_U32,
1541                 .getter = team_notify_peers_interval_get,
1542                 .setter = team_notify_peers_interval_set,
1543         },
1544         {
1545                 .name = "mcast_rejoin_count",
1546                 .type = TEAM_OPTION_TYPE_U32,
1547                 .getter = team_mcast_rejoin_count_get,
1548                 .setter = team_mcast_rejoin_count_set,
1549         },
1550         {
1551                 .name = "mcast_rejoin_interval",
1552                 .type = TEAM_OPTION_TYPE_U32,
1553                 .getter = team_mcast_rejoin_interval_get,
1554                 .setter = team_mcast_rejoin_interval_set,
1555         },
1556         {
1557                 .name = "enabled",
1558                 .type = TEAM_OPTION_TYPE_BOOL,
1559                 .per_port = true,
1560                 .getter = team_port_en_option_get,
1561                 .setter = team_port_en_option_set,
1562         },
1563         {
1564                 .name = "user_linkup",
1565                 .type = TEAM_OPTION_TYPE_BOOL,
1566                 .per_port = true,
1567                 .getter = team_user_linkup_option_get,
1568                 .setter = team_user_linkup_option_set,
1569         },
1570         {
1571                 .name = "user_linkup_enabled",
1572                 .type = TEAM_OPTION_TYPE_BOOL,
1573                 .per_port = true,
1574                 .getter = team_user_linkup_en_option_get,
1575                 .setter = team_user_linkup_en_option_set,
1576         },
1577         {
1578                 .name = "priority",
1579                 .type = TEAM_OPTION_TYPE_S32,
1580                 .per_port = true,
1581                 .getter = team_priority_option_get,
1582                 .setter = team_priority_option_set,
1583         },
1584         {
1585                 .name = "queue_id",
1586                 .type = TEAM_OPTION_TYPE_U32,
1587                 .per_port = true,
1588                 .getter = team_queue_id_option_get,
1589                 .setter = team_queue_id_option_set,
1590         },
1591 };
1592
1593
1594 static int team_init(struct net_device *dev)
1595 {
1596         struct team *team = netdev_priv(dev);
1597         int i;
1598         int err;
1599
1600         team->dev = dev;
1601         mutex_init(&team->lock);
1602         team_set_no_mode(team);
1603
1604         team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1605         if (!team->pcpu_stats)
1606                 return -ENOMEM;
1607
1608         for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1609                 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1610         INIT_LIST_HEAD(&team->port_list);
1611         err = team_queue_override_init(team);
1612         if (err)
1613                 goto err_team_queue_override_init;
1614
1615         team_adjust_ops(team);
1616
1617         INIT_LIST_HEAD(&team->option_list);
1618         INIT_LIST_HEAD(&team->option_inst_list);
1619
1620         team_notify_peers_init(team);
1621         team_mcast_rejoin_init(team);
1622
1623         err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1624         if (err)
1625                 goto err_options_register;
1626         netif_carrier_off(dev);
1627
1628         netdev_lockdep_set_classes(dev);
1629
1630         return 0;
1631
1632 err_options_register:
1633         team_mcast_rejoin_fini(team);
1634         team_notify_peers_fini(team);
1635         team_queue_override_fini(team);
1636 err_team_queue_override_init:
1637         free_percpu(team->pcpu_stats);
1638
1639         return err;
1640 }
1641
1642 static void team_uninit(struct net_device *dev)
1643 {
1644         struct team *team = netdev_priv(dev);
1645         struct team_port *port;
1646         struct team_port *tmp;
1647
1648         mutex_lock(&team->lock);
1649         list_for_each_entry_safe(port, tmp, &team->port_list, list)
1650                 team_port_del(team, port->dev);
1651
1652         __team_change_mode(team, NULL); /* cleanup */
1653         __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1654         team_mcast_rejoin_fini(team);
1655         team_notify_peers_fini(team);
1656         team_queue_override_fini(team);
1657         mutex_unlock(&team->lock);
1658         netdev_change_features(dev);
1659 }
1660
1661 static void team_destructor(struct net_device *dev)
1662 {
1663         struct team *team = netdev_priv(dev);
1664
1665         free_percpu(team->pcpu_stats);
1666 }
1667
1668 static int team_open(struct net_device *dev)
1669 {
1670         return 0;
1671 }
1672
1673 static int team_close(struct net_device *dev)
1674 {
1675         return 0;
1676 }
1677
1678 /*
1679  * note: already called with rcu_read_lock
1680  */
1681 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1682 {
1683         struct team *team = netdev_priv(dev);
1684         bool tx_success;
1685         unsigned int len = skb->len;
1686
1687         tx_success = team_queue_override_transmit(team, skb);
1688         if (!tx_success)
1689                 tx_success = team->ops.transmit(team, skb);
1690         if (tx_success) {
1691                 struct team_pcpu_stats *pcpu_stats;
1692
1693                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1694                 u64_stats_update_begin(&pcpu_stats->syncp);
1695                 pcpu_stats->tx_packets++;
1696                 pcpu_stats->tx_bytes += len;
1697                 u64_stats_update_end(&pcpu_stats->syncp);
1698         } else {
1699                 this_cpu_inc(team->pcpu_stats->tx_dropped);
1700         }
1701
1702         return NETDEV_TX_OK;
1703 }
1704
1705 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1706                              void *accel_priv, select_queue_fallback_t fallback)
1707 {
1708         /*
1709          * This helper function exists to help dev_pick_tx get the correct
1710          * destination queue.  Using a helper function skips a call to
1711          * skb_tx_hash and will put the skbs in the queue we expect on their
1712          * way down to the team driver.
1713          */
1714         u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1715
1716         /*
1717          * Save the original txq to restore before passing to the driver
1718          */
1719         qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1720
1721         if (unlikely(txq >= dev->real_num_tx_queues)) {
1722                 do {
1723                         txq -= dev->real_num_tx_queues;
1724                 } while (txq >= dev->real_num_tx_queues);
1725         }
1726         return txq;
1727 }
1728
1729 static void team_change_rx_flags(struct net_device *dev, int change)
1730 {
1731         struct team *team = netdev_priv(dev);
1732         struct team_port *port;
1733         int inc;
1734
1735         rcu_read_lock();
1736         list_for_each_entry_rcu(port, &team->port_list, list) {
1737                 if (change & IFF_PROMISC) {
1738                         inc = dev->flags & IFF_PROMISC ? 1 : -1;
1739                         dev_set_promiscuity(port->dev, inc);
1740                 }
1741                 if (change & IFF_ALLMULTI) {
1742                         inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1743                         dev_set_allmulti(port->dev, inc);
1744                 }
1745         }
1746         rcu_read_unlock();
1747 }
1748
1749 static void team_set_rx_mode(struct net_device *dev)
1750 {
1751         struct team *team = netdev_priv(dev);
1752         struct team_port *port;
1753
1754         rcu_read_lock();
1755         list_for_each_entry_rcu(port, &team->port_list, list) {
1756                 dev_uc_sync_multiple(port->dev, dev);
1757                 dev_mc_sync_multiple(port->dev, dev);
1758         }
1759         rcu_read_unlock();
1760 }
1761
1762 static int team_set_mac_address(struct net_device *dev, void *p)
1763 {
1764         struct sockaddr *addr = p;
1765         struct team *team = netdev_priv(dev);
1766         struct team_port *port;
1767
1768         if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1769                 return -EADDRNOTAVAIL;
1770         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1771         mutex_lock(&team->lock);
1772         list_for_each_entry(port, &team->port_list, list)
1773                 if (team->ops.port_change_dev_addr)
1774                         team->ops.port_change_dev_addr(team, port);
1775         mutex_unlock(&team->lock);
1776         return 0;
1777 }
1778
1779 static int team_change_mtu(struct net_device *dev, int new_mtu)
1780 {
1781         struct team *team = netdev_priv(dev);
1782         struct team_port *port;
1783         int err;
1784
1785         /*
1786          * Alhough this is reader, it's guarded by team lock. It's not possible
1787          * to traverse list in reverse under rcu_read_lock
1788          */
1789         mutex_lock(&team->lock);
1790         team->port_mtu_change_allowed = true;
1791         list_for_each_entry(port, &team->port_list, list) {
1792                 err = dev_set_mtu(port->dev, new_mtu);
1793                 if (err) {
1794                         netdev_err(dev, "Device %s failed to change mtu",
1795                                    port->dev->name);
1796                         goto unwind;
1797                 }
1798         }
1799         team->port_mtu_change_allowed = false;
1800         mutex_unlock(&team->lock);
1801
1802         dev->mtu = new_mtu;
1803
1804         return 0;
1805
1806 unwind:
1807         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1808                 dev_set_mtu(port->dev, dev->mtu);
1809         team->port_mtu_change_allowed = false;
1810         mutex_unlock(&team->lock);
1811
1812         return err;
1813 }
1814
1815 static void
1816 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1817 {
1818         struct team *team = netdev_priv(dev);
1819         struct team_pcpu_stats *p;
1820         u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1821         u32 rx_dropped = 0, tx_dropped = 0, rx_nohandler = 0;
1822         unsigned int start;
1823         int i;
1824
1825         for_each_possible_cpu(i) {
1826                 p = per_cpu_ptr(team->pcpu_stats, i);
1827                 do {
1828                         start = u64_stats_fetch_begin_irq(&p->syncp);
1829                         rx_packets      = p->rx_packets;
1830                         rx_bytes        = p->rx_bytes;
1831                         rx_multicast    = p->rx_multicast;
1832                         tx_packets      = p->tx_packets;
1833                         tx_bytes        = p->tx_bytes;
1834                 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
1835
1836                 stats->rx_packets       += rx_packets;
1837                 stats->rx_bytes         += rx_bytes;
1838                 stats->multicast        += rx_multicast;
1839                 stats->tx_packets       += tx_packets;
1840                 stats->tx_bytes         += tx_bytes;
1841                 /*
1842                  * rx_dropped, tx_dropped & rx_nohandler are u32,
1843                  * updated without syncp protection.
1844                  */
1845                 rx_dropped      += p->rx_dropped;
1846                 tx_dropped      += p->tx_dropped;
1847                 rx_nohandler    += p->rx_nohandler;
1848         }
1849         stats->rx_dropped       = rx_dropped;
1850         stats->tx_dropped       = tx_dropped;
1851         stats->rx_nohandler     = rx_nohandler;
1852 }
1853
1854 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1855 {
1856         struct team *team = netdev_priv(dev);
1857         struct team_port *port;
1858         int err;
1859
1860         /*
1861          * Alhough this is reader, it's guarded by team lock. It's not possible
1862          * to traverse list in reverse under rcu_read_lock
1863          */
1864         mutex_lock(&team->lock);
1865         list_for_each_entry(port, &team->port_list, list) {
1866                 err = vlan_vid_add(port->dev, proto, vid);
1867                 if (err)
1868                         goto unwind;
1869         }
1870         mutex_unlock(&team->lock);
1871
1872         return 0;
1873
1874 unwind:
1875         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1876                 vlan_vid_del(port->dev, proto, vid);
1877         mutex_unlock(&team->lock);
1878
1879         return err;
1880 }
1881
1882 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1883 {
1884         struct team *team = netdev_priv(dev);
1885         struct team_port *port;
1886
1887         mutex_lock(&team->lock);
1888         list_for_each_entry(port, &team->port_list, list)
1889                 vlan_vid_del(port->dev, proto, vid);
1890         mutex_unlock(&team->lock);
1891
1892         return 0;
1893 }
1894
1895 #ifdef CONFIG_NET_POLL_CONTROLLER
1896 static void team_poll_controller(struct net_device *dev)
1897 {
1898 }
1899
1900 static void __team_netpoll_cleanup(struct team *team)
1901 {
1902         struct team_port *port;
1903
1904         list_for_each_entry(port, &team->port_list, list)
1905                 team_port_disable_netpoll(port);
1906 }
1907
1908 static void team_netpoll_cleanup(struct net_device *dev)
1909 {
1910         struct team *team = netdev_priv(dev);
1911
1912         mutex_lock(&team->lock);
1913         __team_netpoll_cleanup(team);
1914         mutex_unlock(&team->lock);
1915 }
1916
1917 static int team_netpoll_setup(struct net_device *dev,
1918                               struct netpoll_info *npifo)
1919 {
1920         struct team *team = netdev_priv(dev);
1921         struct team_port *port;
1922         int err = 0;
1923
1924         mutex_lock(&team->lock);
1925         list_for_each_entry(port, &team->port_list, list) {
1926                 err = __team_port_enable_netpoll(port);
1927                 if (err) {
1928                         __team_netpoll_cleanup(team);
1929                         break;
1930                 }
1931         }
1932         mutex_unlock(&team->lock);
1933         return err;
1934 }
1935 #endif
1936
1937 static int team_add_slave(struct net_device *dev, struct net_device *port_dev,
1938                           struct netlink_ext_ack *extack)
1939 {
1940         struct team *team = netdev_priv(dev);
1941         int err;
1942
1943         mutex_lock(&team->lock);
1944         err = team_port_add(team, port_dev, extack);
1945         mutex_unlock(&team->lock);
1946
1947         if (!err)
1948                 netdev_change_features(dev);
1949
1950         return err;
1951 }
1952
1953 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1954 {
1955         struct team *team = netdev_priv(dev);
1956         int err;
1957
1958         mutex_lock(&team->lock);
1959         err = team_port_del(team, port_dev);
1960         mutex_unlock(&team->lock);
1961
1962         if (!err)
1963                 netdev_change_features(dev);
1964
1965         return err;
1966 }
1967
1968 static netdev_features_t team_fix_features(struct net_device *dev,
1969                                            netdev_features_t features)
1970 {
1971         struct team_port *port;
1972         struct team *team = netdev_priv(dev);
1973         netdev_features_t mask;
1974
1975         mask = features;
1976         features &= ~NETIF_F_ONE_FOR_ALL;
1977         features |= NETIF_F_ALL_FOR_ALL;
1978
1979         rcu_read_lock();
1980         list_for_each_entry_rcu(port, &team->port_list, list) {
1981                 features = netdev_increment_features(features,
1982                                                      port->dev->features,
1983                                                      mask);
1984         }
1985         rcu_read_unlock();
1986
1987         features = netdev_add_tso_features(features, mask);
1988
1989         return features;
1990 }
1991
1992 static int team_change_carrier(struct net_device *dev, bool new_carrier)
1993 {
1994         struct team *team = netdev_priv(dev);
1995
1996         team->user_carrier_enabled = true;
1997
1998         if (new_carrier)
1999                 netif_carrier_on(dev);
2000         else
2001                 netif_carrier_off(dev);
2002         return 0;
2003 }
2004
2005 static const struct net_device_ops team_netdev_ops = {
2006         .ndo_init               = team_init,
2007         .ndo_uninit             = team_uninit,
2008         .ndo_open               = team_open,
2009         .ndo_stop               = team_close,
2010         .ndo_start_xmit         = team_xmit,
2011         .ndo_select_queue       = team_select_queue,
2012         .ndo_change_rx_flags    = team_change_rx_flags,
2013         .ndo_set_rx_mode        = team_set_rx_mode,
2014         .ndo_set_mac_address    = team_set_mac_address,
2015         .ndo_change_mtu         = team_change_mtu,
2016         .ndo_get_stats64        = team_get_stats64,
2017         .ndo_vlan_rx_add_vid    = team_vlan_rx_add_vid,
2018         .ndo_vlan_rx_kill_vid   = team_vlan_rx_kill_vid,
2019 #ifdef CONFIG_NET_POLL_CONTROLLER
2020         .ndo_poll_controller    = team_poll_controller,
2021         .ndo_netpoll_setup      = team_netpoll_setup,
2022         .ndo_netpoll_cleanup    = team_netpoll_cleanup,
2023 #endif
2024         .ndo_add_slave          = team_add_slave,
2025         .ndo_del_slave          = team_del_slave,
2026         .ndo_fix_features       = team_fix_features,
2027         .ndo_change_carrier     = team_change_carrier,
2028         .ndo_features_check     = passthru_features_check,
2029 };
2030
2031 /***********************
2032  * ethtool interface
2033  ***********************/
2034
2035 static void team_ethtool_get_drvinfo(struct net_device *dev,
2036                                      struct ethtool_drvinfo *drvinfo)
2037 {
2038         strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
2039         strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2040 }
2041
2042 static const struct ethtool_ops team_ethtool_ops = {
2043         .get_drvinfo            = team_ethtool_get_drvinfo,
2044         .get_link               = ethtool_op_get_link,
2045 };
2046
2047 /***********************
2048  * rt netlink interface
2049  ***********************/
2050
2051 static void team_setup_by_port(struct net_device *dev,
2052                                struct net_device *port_dev)
2053 {
2054         dev->header_ops = port_dev->header_ops;
2055         dev->type = port_dev->type;
2056         dev->hard_header_len = port_dev->hard_header_len;
2057         dev->addr_len = port_dev->addr_len;
2058         dev->mtu = port_dev->mtu;
2059         memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2060         eth_hw_addr_inherit(dev, port_dev);
2061 }
2062
2063 static int team_dev_type_check_change(struct net_device *dev,
2064                                       struct net_device *port_dev)
2065 {
2066         struct team *team = netdev_priv(dev);
2067         char *portname = port_dev->name;
2068         int err;
2069
2070         if (dev->type == port_dev->type)
2071                 return 0;
2072         if (!list_empty(&team->port_list)) {
2073                 netdev_err(dev, "Device %s is of different type\n", portname);
2074                 return -EBUSY;
2075         }
2076         err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2077         err = notifier_to_errno(err);
2078         if (err) {
2079                 netdev_err(dev, "Refused to change device type\n");
2080                 return err;
2081         }
2082         dev_uc_flush(dev);
2083         dev_mc_flush(dev);
2084         team_setup_by_port(dev, port_dev);
2085         call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2086         return 0;
2087 }
2088
2089 static void team_setup(struct net_device *dev)
2090 {
2091         ether_setup(dev);
2092         dev->max_mtu = ETH_MAX_MTU;
2093
2094         dev->netdev_ops = &team_netdev_ops;
2095         dev->ethtool_ops = &team_ethtool_ops;
2096         dev->needs_free_netdev = true;
2097         dev->priv_destructor = team_destructor;
2098         dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2099         dev->priv_flags |= IFF_NO_QUEUE;
2100         dev->priv_flags |= IFF_TEAM;
2101
2102         /*
2103          * Indicate we support unicast address filtering. That way core won't
2104          * bring us to promisc mode in case a unicast addr is added.
2105          * Let this up to underlay drivers.
2106          */
2107         dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2108
2109         dev->features |= NETIF_F_LLTX;
2110         dev->features |= NETIF_F_GRO;
2111
2112         /* Don't allow team devices to change network namespaces. */
2113         dev->features |= NETIF_F_NETNS_LOCAL;
2114
2115         dev->hw_features = TEAM_VLAN_FEATURES |
2116                            NETIF_F_HW_VLAN_CTAG_TX |
2117                            NETIF_F_HW_VLAN_CTAG_RX |
2118                            NETIF_F_HW_VLAN_CTAG_FILTER;
2119
2120         dev->hw_features |= NETIF_F_GSO_ENCAP_ALL;
2121         dev->features |= dev->hw_features;
2122 }
2123
2124 static int team_newlink(struct net *src_net, struct net_device *dev,
2125                         struct nlattr *tb[], struct nlattr *data[],
2126                         struct netlink_ext_ack *extack)
2127 {
2128         if (tb[IFLA_ADDRESS] == NULL)
2129                 eth_hw_addr_random(dev);
2130
2131         return register_netdevice(dev);
2132 }
2133
2134 static int team_validate(struct nlattr *tb[], struct nlattr *data[],
2135                          struct netlink_ext_ack *extack)
2136 {
2137         if (tb[IFLA_ADDRESS]) {
2138                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2139                         return -EINVAL;
2140                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2141                         return -EADDRNOTAVAIL;
2142         }
2143         return 0;
2144 }
2145
2146 static unsigned int team_get_num_tx_queues(void)
2147 {
2148         return TEAM_DEFAULT_NUM_TX_QUEUES;
2149 }
2150
2151 static unsigned int team_get_num_rx_queues(void)
2152 {
2153         return TEAM_DEFAULT_NUM_RX_QUEUES;
2154 }
2155
2156 static struct rtnl_link_ops team_link_ops __read_mostly = {
2157         .kind                   = DRV_NAME,
2158         .priv_size              = sizeof(struct team),
2159         .setup                  = team_setup,
2160         .newlink                = team_newlink,
2161         .validate               = team_validate,
2162         .get_num_tx_queues      = team_get_num_tx_queues,
2163         .get_num_rx_queues      = team_get_num_rx_queues,
2164 };
2165
2166
2167 /***********************************
2168  * Generic netlink custom interface
2169  ***********************************/
2170
2171 static struct genl_family team_nl_family;
2172
2173 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2174         [TEAM_ATTR_UNSPEC]                      = { .type = NLA_UNSPEC, },
2175         [TEAM_ATTR_TEAM_IFINDEX]                = { .type = NLA_U32 },
2176         [TEAM_ATTR_LIST_OPTION]                 = { .type = NLA_NESTED },
2177         [TEAM_ATTR_LIST_PORT]                   = { .type = NLA_NESTED },
2178 };
2179
2180 static const struct nla_policy
2181 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2182         [TEAM_ATTR_OPTION_UNSPEC]               = { .type = NLA_UNSPEC, },
2183         [TEAM_ATTR_OPTION_NAME] = {
2184                 .type = NLA_STRING,
2185                 .len = TEAM_STRING_MAX_LEN,
2186         },
2187         [TEAM_ATTR_OPTION_CHANGED]              = { .type = NLA_FLAG },
2188         [TEAM_ATTR_OPTION_TYPE]                 = { .type = NLA_U8 },
2189         [TEAM_ATTR_OPTION_DATA]                 = { .type = NLA_BINARY },
2190 };
2191
2192 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2193 {
2194         struct sk_buff *msg;
2195         void *hdr;
2196         int err;
2197
2198         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2199         if (!msg)
2200                 return -ENOMEM;
2201
2202         hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2203                           &team_nl_family, 0, TEAM_CMD_NOOP);
2204         if (!hdr) {
2205                 err = -EMSGSIZE;
2206                 goto err_msg_put;
2207         }
2208
2209         genlmsg_end(msg, hdr);
2210
2211         return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2212
2213 err_msg_put:
2214         nlmsg_free(msg);
2215
2216         return err;
2217 }
2218
2219 /*
2220  * Netlink cmd functions should be locked by following two functions.
2221  * Since dev gets held here, that ensures dev won't disappear in between.
2222  */
2223 static struct team *team_nl_team_get(struct genl_info *info)
2224 {
2225         struct net *net = genl_info_net(info);
2226         int ifindex;
2227         struct net_device *dev;
2228         struct team *team;
2229
2230         if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2231                 return NULL;
2232
2233         ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2234         dev = dev_get_by_index(net, ifindex);
2235         if (!dev || dev->netdev_ops != &team_netdev_ops) {
2236                 if (dev)
2237                         dev_put(dev);
2238                 return NULL;
2239         }
2240
2241         team = netdev_priv(dev);
2242         mutex_lock(&team->lock);
2243         return team;
2244 }
2245
2246 static void team_nl_team_put(struct team *team)
2247 {
2248         mutex_unlock(&team->lock);
2249         dev_put(team->dev);
2250 }
2251
2252 typedef int team_nl_send_func_t(struct sk_buff *skb,
2253                                 struct team *team, u32 portid);
2254
2255 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2256 {
2257         return genlmsg_unicast(dev_net(team->dev), skb, portid);
2258 }
2259
2260 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2261                                        struct team_option_inst *opt_inst)
2262 {
2263         struct nlattr *option_item;
2264         struct team_option *option = opt_inst->option;
2265         struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2266         struct team_gsetter_ctx ctx;
2267         int err;
2268
2269         ctx.info = opt_inst_info;
2270         err = team_option_get(team, opt_inst, &ctx);
2271         if (err)
2272                 return err;
2273
2274         option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
2275         if (!option_item)
2276                 return -EMSGSIZE;
2277
2278         if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2279                 goto nest_cancel;
2280         if (opt_inst_info->port &&
2281             nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2282                         opt_inst_info->port->dev->ifindex))
2283                 goto nest_cancel;
2284         if (opt_inst->option->array_size &&
2285             nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2286                         opt_inst_info->array_index))
2287                 goto nest_cancel;
2288
2289         switch (option->type) {
2290         case TEAM_OPTION_TYPE_U32:
2291                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2292                         goto nest_cancel;
2293                 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2294                         goto nest_cancel;
2295                 break;
2296         case TEAM_OPTION_TYPE_STRING:
2297                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2298                         goto nest_cancel;
2299                 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2300                                    ctx.data.str_val))
2301                         goto nest_cancel;
2302                 break;
2303         case TEAM_OPTION_TYPE_BINARY:
2304                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2305                         goto nest_cancel;
2306                 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2307                             ctx.data.bin_val.ptr))
2308                         goto nest_cancel;
2309                 break;
2310         case TEAM_OPTION_TYPE_BOOL:
2311                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2312                         goto nest_cancel;
2313                 if (ctx.data.bool_val &&
2314                     nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2315                         goto nest_cancel;
2316                 break;
2317         case TEAM_OPTION_TYPE_S32:
2318                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2319                         goto nest_cancel;
2320                 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2321                         goto nest_cancel;
2322                 break;
2323         default:
2324                 BUG();
2325         }
2326         if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2327                 goto nest_cancel;
2328         if (opt_inst->changed) {
2329                 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2330                         goto nest_cancel;
2331                 opt_inst->changed = false;
2332         }
2333         nla_nest_end(skb, option_item);
2334         return 0;
2335
2336 nest_cancel:
2337         nla_nest_cancel(skb, option_item);
2338         return -EMSGSIZE;
2339 }
2340
2341 static int __send_and_alloc_skb(struct sk_buff **pskb,
2342                                 struct team *team, u32 portid,
2343                                 team_nl_send_func_t *send_func)
2344 {
2345         int err;
2346
2347         if (*pskb) {
2348                 err = send_func(*pskb, team, portid);
2349                 if (err)
2350                         return err;
2351         }
2352         *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2353         if (!*pskb)
2354                 return -ENOMEM;
2355         return 0;
2356 }
2357
2358 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2359                                     int flags, team_nl_send_func_t *send_func,
2360                                     struct list_head *sel_opt_inst_list)
2361 {
2362         struct nlattr *option_list;
2363         struct nlmsghdr *nlh;
2364         void *hdr;
2365         struct team_option_inst *opt_inst;
2366         int err;
2367         struct sk_buff *skb = NULL;
2368         bool incomplete;
2369         int i;
2370
2371         opt_inst = list_first_entry(sel_opt_inst_list,
2372                                     struct team_option_inst, tmp_list);
2373
2374 start_again:
2375         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2376         if (err)
2377                 return err;
2378
2379         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2380                           TEAM_CMD_OPTIONS_GET);
2381         if (!hdr) {
2382                 nlmsg_free(skb);
2383                 return -EMSGSIZE;
2384         }
2385
2386         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2387                 goto nla_put_failure;
2388         option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2389         if (!option_list)
2390                 goto nla_put_failure;
2391
2392         i = 0;
2393         incomplete = false;
2394         list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2395                 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2396                 if (err) {
2397                         if (err == -EMSGSIZE) {
2398                                 if (!i)
2399                                         goto errout;
2400                                 incomplete = true;
2401                                 break;
2402                         }
2403                         goto errout;
2404                 }
2405                 i++;
2406         }
2407
2408         nla_nest_end(skb, option_list);
2409         genlmsg_end(skb, hdr);
2410         if (incomplete)
2411                 goto start_again;
2412
2413 send_done:
2414         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2415         if (!nlh) {
2416                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2417                 if (err)
2418                         return err;
2419                 goto send_done;
2420         }
2421
2422         return send_func(skb, team, portid);
2423
2424 nla_put_failure:
2425         err = -EMSGSIZE;
2426 errout:
2427         genlmsg_cancel(skb, hdr);
2428         nlmsg_free(skb);
2429         return err;
2430 }
2431
2432 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2433 {
2434         struct team *team;
2435         struct team_option_inst *opt_inst;
2436         int err;
2437         LIST_HEAD(sel_opt_inst_list);
2438
2439         team = team_nl_team_get(info);
2440         if (!team)
2441                 return -EINVAL;
2442
2443         list_for_each_entry(opt_inst, &team->option_inst_list, list)
2444                 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2445         err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2446                                        NLM_F_ACK, team_nl_send_unicast,
2447                                        &sel_opt_inst_list);
2448
2449         team_nl_team_put(team);
2450
2451         return err;
2452 }
2453
2454 static int team_nl_send_event_options_get(struct team *team,
2455                                           struct list_head *sel_opt_inst_list);
2456
2457 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2458 {
2459         struct team *team;
2460         int err = 0;
2461         int i;
2462         struct nlattr *nl_option;
2463         LIST_HEAD(opt_inst_list);
2464
2465         rtnl_lock();
2466
2467         team = team_nl_team_get(info);
2468         if (!team) {
2469                 err = -EINVAL;
2470                 goto rtnl_unlock;
2471         }
2472
2473         err = -EINVAL;
2474         if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2475                 err = -EINVAL;
2476                 goto team_put;
2477         }
2478
2479         nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2480                 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2481                 struct nlattr *attr;
2482                 struct nlattr *attr_data;
2483                 enum team_option_type opt_type;
2484                 int opt_port_ifindex = 0; /* != 0 for per-port options */
2485                 u32 opt_array_index = 0;
2486                 bool opt_is_array = false;
2487                 struct team_option_inst *opt_inst;
2488                 char *opt_name;
2489                 bool opt_found = false;
2490
2491                 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2492                         err = -EINVAL;
2493                         goto team_put;
2494                 }
2495                 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2496                                        nl_option, team_nl_option_policy,
2497                                        info->extack);
2498                 if (err)
2499                         goto team_put;
2500                 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2501                     !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2502                         err = -EINVAL;
2503                         goto team_put;
2504                 }
2505                 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2506                 case NLA_U32:
2507                         opt_type = TEAM_OPTION_TYPE_U32;
2508                         break;
2509                 case NLA_STRING:
2510                         opt_type = TEAM_OPTION_TYPE_STRING;
2511                         break;
2512                 case NLA_BINARY:
2513                         opt_type = TEAM_OPTION_TYPE_BINARY;
2514                         break;
2515                 case NLA_FLAG:
2516                         opt_type = TEAM_OPTION_TYPE_BOOL;
2517                         break;
2518                 case NLA_S32:
2519                         opt_type = TEAM_OPTION_TYPE_S32;
2520                         break;
2521                 default:
2522                         goto team_put;
2523                 }
2524
2525                 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2526                 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2527                         err = -EINVAL;
2528                         goto team_put;
2529                 }
2530
2531                 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2532                 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2533                 if (attr)
2534                         opt_port_ifindex = nla_get_u32(attr);
2535
2536                 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2537                 if (attr) {
2538                         opt_is_array = true;
2539                         opt_array_index = nla_get_u32(attr);
2540                 }
2541
2542                 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2543                         struct team_option *option = opt_inst->option;
2544                         struct team_gsetter_ctx ctx;
2545                         struct team_option_inst_info *opt_inst_info;
2546                         int tmp_ifindex;
2547
2548                         opt_inst_info = &opt_inst->info;
2549                         tmp_ifindex = opt_inst_info->port ?
2550                                       opt_inst_info->port->dev->ifindex : 0;
2551                         if (option->type != opt_type ||
2552                             strcmp(option->name, opt_name) ||
2553                             tmp_ifindex != opt_port_ifindex ||
2554                             (option->array_size && !opt_is_array) ||
2555                             opt_inst_info->array_index != opt_array_index)
2556                                 continue;
2557                         opt_found = true;
2558                         ctx.info = opt_inst_info;
2559                         switch (opt_type) {
2560                         case TEAM_OPTION_TYPE_U32:
2561                                 ctx.data.u32_val = nla_get_u32(attr_data);
2562                                 break;
2563                         case TEAM_OPTION_TYPE_STRING:
2564                                 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2565                                         err = -EINVAL;
2566                                         goto team_put;
2567                                 }
2568                                 ctx.data.str_val = nla_data(attr_data);
2569                                 break;
2570                         case TEAM_OPTION_TYPE_BINARY:
2571                                 ctx.data.bin_val.len = nla_len(attr_data);
2572                                 ctx.data.bin_val.ptr = nla_data(attr_data);
2573                                 break;
2574                         case TEAM_OPTION_TYPE_BOOL:
2575                                 ctx.data.bool_val = attr_data ? true : false;
2576                                 break;
2577                         case TEAM_OPTION_TYPE_S32:
2578                                 ctx.data.s32_val = nla_get_s32(attr_data);
2579                                 break;
2580                         default:
2581                                 BUG();
2582                         }
2583                         err = team_option_set(team, opt_inst, &ctx);
2584                         if (err)
2585                                 goto team_put;
2586                         opt_inst->changed = true;
2587
2588                         /* dumb/evil user-space can send us duplicate opt,
2589                          * keep only the last one
2590                          */
2591                         if (__team_option_inst_tmp_find(&opt_inst_list,
2592                                                         opt_inst))
2593                                 continue;
2594
2595                         list_add(&opt_inst->tmp_list, &opt_inst_list);
2596                 }
2597                 if (!opt_found) {
2598                         err = -ENOENT;
2599                         goto team_put;
2600                 }
2601         }
2602
2603         err = team_nl_send_event_options_get(team, &opt_inst_list);
2604
2605 team_put:
2606         team_nl_team_put(team);
2607 rtnl_unlock:
2608         rtnl_unlock();
2609         return err;
2610 }
2611
2612 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2613                                      struct team_port *port)
2614 {
2615         struct nlattr *port_item;
2616
2617         port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2618         if (!port_item)
2619                 goto nest_cancel;
2620         if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2621                 goto nest_cancel;
2622         if (port->changed) {
2623                 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2624                         goto nest_cancel;
2625                 port->changed = false;
2626         }
2627         if ((port->removed &&
2628              nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2629             (port->state.linkup &&
2630              nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2631             nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2632             nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2633                 goto nest_cancel;
2634         nla_nest_end(skb, port_item);
2635         return 0;
2636
2637 nest_cancel:
2638         nla_nest_cancel(skb, port_item);
2639         return -EMSGSIZE;
2640 }
2641
2642 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2643                                       int flags, team_nl_send_func_t *send_func,
2644                                       struct team_port *one_port)
2645 {
2646         struct nlattr *port_list;
2647         struct nlmsghdr *nlh;
2648         void *hdr;
2649         struct team_port *port;
2650         int err;
2651         struct sk_buff *skb = NULL;
2652         bool incomplete;
2653         int i;
2654
2655         port = list_first_entry_or_null(&team->port_list,
2656                                         struct team_port, list);
2657
2658 start_again:
2659         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2660         if (err)
2661                 return err;
2662
2663         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2664                           TEAM_CMD_PORT_LIST_GET);
2665         if (!hdr) {
2666                 nlmsg_free(skb);
2667                 return -EMSGSIZE;
2668         }
2669
2670         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2671                 goto nla_put_failure;
2672         port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2673         if (!port_list)
2674                 goto nla_put_failure;
2675
2676         i = 0;
2677         incomplete = false;
2678
2679         /* If one port is selected, called wants to send port list containing
2680          * only this port. Otherwise go through all listed ports and send all
2681          */
2682         if (one_port) {
2683                 err = team_nl_fill_one_port_get(skb, one_port);
2684                 if (err)
2685                         goto errout;
2686         } else if (port) {
2687                 list_for_each_entry_from(port, &team->port_list, list) {
2688                         err = team_nl_fill_one_port_get(skb, port);
2689                         if (err) {
2690                                 if (err == -EMSGSIZE) {
2691                                         if (!i)
2692                                                 goto errout;
2693                                         incomplete = true;
2694                                         break;
2695                                 }
2696                                 goto errout;
2697                         }
2698                         i++;
2699                 }
2700         }
2701
2702         nla_nest_end(skb, port_list);
2703         genlmsg_end(skb, hdr);
2704         if (incomplete)
2705                 goto start_again;
2706
2707 send_done:
2708         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2709         if (!nlh) {
2710                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2711                 if (err)
2712                         return err;
2713                 goto send_done;
2714         }
2715
2716         return send_func(skb, team, portid);
2717
2718 nla_put_failure:
2719         err = -EMSGSIZE;
2720 errout:
2721         genlmsg_cancel(skb, hdr);
2722         nlmsg_free(skb);
2723         return err;
2724 }
2725
2726 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2727                                      struct genl_info *info)
2728 {
2729         struct team *team;
2730         int err;
2731
2732         team = team_nl_team_get(info);
2733         if (!team)
2734                 return -EINVAL;
2735
2736         err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2737                                          NLM_F_ACK, team_nl_send_unicast, NULL);
2738
2739         team_nl_team_put(team);
2740
2741         return err;
2742 }
2743
2744 static const struct genl_ops team_nl_ops[] = {
2745         {
2746                 .cmd = TEAM_CMD_NOOP,
2747                 .doit = team_nl_cmd_noop,
2748                 .policy = team_nl_policy,
2749         },
2750         {
2751                 .cmd = TEAM_CMD_OPTIONS_SET,
2752                 .doit = team_nl_cmd_options_set,
2753                 .policy = team_nl_policy,
2754                 .flags = GENL_ADMIN_PERM,
2755         },
2756         {
2757                 .cmd = TEAM_CMD_OPTIONS_GET,
2758                 .doit = team_nl_cmd_options_get,
2759                 .policy = team_nl_policy,
2760                 .flags = GENL_ADMIN_PERM,
2761         },
2762         {
2763                 .cmd = TEAM_CMD_PORT_LIST_GET,
2764                 .doit = team_nl_cmd_port_list_get,
2765                 .policy = team_nl_policy,
2766                 .flags = GENL_ADMIN_PERM,
2767         },
2768 };
2769
2770 static const struct genl_multicast_group team_nl_mcgrps[] = {
2771         { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2772 };
2773
2774 static struct genl_family team_nl_family __ro_after_init = {
2775         .name           = TEAM_GENL_NAME,
2776         .version        = TEAM_GENL_VERSION,
2777         .maxattr        = TEAM_ATTR_MAX,
2778         .netnsok        = true,
2779         .module         = THIS_MODULE,
2780         .ops            = team_nl_ops,
2781         .n_ops          = ARRAY_SIZE(team_nl_ops),
2782         .mcgrps         = team_nl_mcgrps,
2783         .n_mcgrps       = ARRAY_SIZE(team_nl_mcgrps),
2784 };
2785
2786 static int team_nl_send_multicast(struct sk_buff *skb,
2787                                   struct team *team, u32 portid)
2788 {
2789         return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2790                                        skb, 0, 0, GFP_KERNEL);
2791 }
2792
2793 static int team_nl_send_event_options_get(struct team *team,
2794                                           struct list_head *sel_opt_inst_list)
2795 {
2796         return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2797                                         sel_opt_inst_list);
2798 }
2799
2800 static int team_nl_send_event_port_get(struct team *team,
2801                                        struct team_port *port)
2802 {
2803         return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2804                                           port);
2805 }
2806
2807 static int __init team_nl_init(void)
2808 {
2809         return genl_register_family(&team_nl_family);
2810 }
2811
2812 static void team_nl_fini(void)
2813 {
2814         genl_unregister_family(&team_nl_family);
2815 }
2816
2817
2818 /******************
2819  * Change checkers
2820  ******************/
2821
2822 static void __team_options_change_check(struct team *team)
2823 {
2824         int err;
2825         struct team_option_inst *opt_inst;
2826         LIST_HEAD(sel_opt_inst_list);
2827
2828         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2829                 if (opt_inst->changed)
2830                         list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2831         }
2832         err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2833         if (err && err != -ESRCH)
2834                 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2835                             err);
2836 }
2837
2838 /* rtnl lock is held */
2839
2840 static void __team_port_change_send(struct team_port *port, bool linkup)
2841 {
2842         int err;
2843
2844         port->changed = true;
2845         port->state.linkup = linkup;
2846         team_refresh_port_linkup(port);
2847         if (linkup) {
2848                 struct ethtool_link_ksettings ecmd;
2849
2850                 err = __ethtool_get_link_ksettings(port->dev, &ecmd);
2851                 if (!err) {
2852                         port->state.speed = ecmd.base.speed;
2853                         port->state.duplex = ecmd.base.duplex;
2854                         goto send_event;
2855                 }
2856         }
2857         port->state.speed = 0;
2858         port->state.duplex = 0;
2859
2860 send_event:
2861         err = team_nl_send_event_port_get(port->team, port);
2862         if (err && err != -ESRCH)
2863                 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2864                             port->dev->name, err);
2865
2866 }
2867
2868 static void __team_carrier_check(struct team *team)
2869 {
2870         struct team_port *port;
2871         bool team_linkup;
2872
2873         if (team->user_carrier_enabled)
2874                 return;
2875
2876         team_linkup = false;
2877         list_for_each_entry(port, &team->port_list, list) {
2878                 if (port->linkup) {
2879                         team_linkup = true;
2880                         break;
2881                 }
2882         }
2883
2884         if (team_linkup)
2885                 netif_carrier_on(team->dev);
2886         else
2887                 netif_carrier_off(team->dev);
2888 }
2889
2890 static void __team_port_change_check(struct team_port *port, bool linkup)
2891 {
2892         if (port->state.linkup != linkup)
2893                 __team_port_change_send(port, linkup);
2894         __team_carrier_check(port->team);
2895 }
2896
2897 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2898 {
2899         __team_port_change_send(port, linkup);
2900         __team_carrier_check(port->team);
2901 }
2902
2903 static void __team_port_change_port_removed(struct team_port *port)
2904 {
2905         port->removed = true;
2906         __team_port_change_send(port, false);
2907         __team_carrier_check(port->team);
2908 }
2909
2910 static void team_port_change_check(struct team_port *port, bool linkup)
2911 {
2912         struct team *team = port->team;
2913
2914         mutex_lock(&team->lock);
2915         __team_port_change_check(port, linkup);
2916         mutex_unlock(&team->lock);
2917 }
2918
2919
2920 /************************************
2921  * Net device notifier event handler
2922  ************************************/
2923
2924 static int team_device_event(struct notifier_block *unused,
2925                              unsigned long event, void *ptr)
2926 {
2927         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2928         struct team_port *port;
2929
2930         port = team_port_get_rtnl(dev);
2931         if (!port)
2932                 return NOTIFY_DONE;
2933
2934         switch (event) {
2935         case NETDEV_UP:
2936                 if (netif_carrier_ok(dev))
2937                         team_port_change_check(port, true);
2938                 break;
2939         case NETDEV_DOWN:
2940                 team_port_change_check(port, false);
2941                 break;
2942         case NETDEV_CHANGE:
2943                 if (netif_running(port->dev))
2944                         team_port_change_check(port,
2945                                                !!netif_carrier_ok(port->dev));
2946                 break;
2947         case NETDEV_UNREGISTER:
2948                 team_del_slave(port->team->dev, dev);
2949                 break;
2950         case NETDEV_FEAT_CHANGE:
2951                 team_compute_features(port->team);
2952                 break;
2953         case NETDEV_PRECHANGEMTU:
2954                 /* Forbid to change mtu of underlaying device */
2955                 if (!port->team->port_mtu_change_allowed)
2956                         return NOTIFY_BAD;
2957                 break;
2958         case NETDEV_PRE_TYPE_CHANGE:
2959                 /* Forbid to change type of underlaying device */
2960                 return NOTIFY_BAD;
2961         case NETDEV_RESEND_IGMP:
2962                 /* Propagate to master device */
2963                 call_netdevice_notifiers(event, port->team->dev);
2964                 break;
2965         }
2966         return NOTIFY_DONE;
2967 }
2968
2969 static struct notifier_block team_notifier_block __read_mostly = {
2970         .notifier_call = team_device_event,
2971 };
2972
2973
2974 /***********************
2975  * Module init and exit
2976  ***********************/
2977
2978 static int __init team_module_init(void)
2979 {
2980         int err;
2981
2982         register_netdevice_notifier(&team_notifier_block);
2983
2984         err = rtnl_link_register(&team_link_ops);
2985         if (err)
2986                 goto err_rtnl_reg;
2987
2988         err = team_nl_init();
2989         if (err)
2990                 goto err_nl_init;
2991
2992         return 0;
2993
2994 err_nl_init:
2995         rtnl_link_unregister(&team_link_ops);
2996
2997 err_rtnl_reg:
2998         unregister_netdevice_notifier(&team_notifier_block);
2999
3000         return err;
3001 }
3002
3003 static void __exit team_module_exit(void)
3004 {
3005         team_nl_fini();
3006         rtnl_link_unregister(&team_link_ops);
3007         unregister_netdevice_notifier(&team_notifier_block);
3008 }
3009
3010 module_init(team_module_init);
3011 module_exit(team_module_exit);
3012
3013 MODULE_LICENSE("GPL v2");
3014 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
3015 MODULE_DESCRIPTION("Ethernet team device driver");
3016 MODULE_ALIAS_RTNL_LINK(DRV_NAME);