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_rtnl(const struct net_device *dev)
  45 {
  46         struct team_port *port = rtnl_dereference(dev->rx_handler_data);
  47
  48         return team_port_exists(dev) ? port : NULL;
  49 }
  50
  51 /*
  52  * Since the ability to change device address for open port device is tested in
  53  * team_port_add, this function can be called without control of return value
  54  */
  55 static int __set_port_dev_addr(struct net_device *port_dev,
  56                                const unsigned char *dev_addr)
  57 {
  58         struct sockaddr_storage addr;
  59
  60         memcpy(addr.__data, dev_addr, port_dev->addr_len);
  61         addr.ss_family = port_dev->type;
  62         return dev_set_mac_address(port_dev, (struct sockaddr *)&addr);
  63 }
  64
  65 static int team_port_set_orig_dev_addr(struct team_port *port)
  66 {
  67         return __set_port_dev_addr(port->dev, port->orig.dev_addr);
  68 }
  69
  70 static int team_port_set_team_dev_addr(struct team *team,
  71                                        struct team_port *port)
  72 {
  73         return __set_port_dev_addr(port->dev, team->dev->dev_addr);
  74 }
  75
  76 int team_modeop_port_enter(struct team *team, struct team_port *port)
  77 {
  78         return team_port_set_team_dev_addr(team, port);
  79 }
  80 EXPORT_SYMBOL(team_modeop_port_enter);
  81
  82 void team_modeop_port_change_dev_addr(struct team *team,
  83                                       struct team_port *port)
  84 {
  85         team_port_set_team_dev_addr(team, port);
  86 }
  87 EXPORT_SYMBOL(team_modeop_port_change_dev_addr);
  88
  89 static void team_lower_state_changed(struct team_port *port)
  90 {
  91         struct netdev_lag_lower_state_info info;
  92
  93         info.link_up = port->linkup;
  94         info.tx_enabled = team_port_enabled(port);
  95         netdev_lower_state_changed(port->dev, &info);
  96 }
  97
  98 static void team_refresh_port_linkup(struct team_port *port)
  99 {
 100         bool new_linkup = port->user.linkup_enabled ? port->user.linkup :
 101                                                       port->state.linkup;
 102
 103         if (port->linkup != new_linkup) {
 104                 port->linkup = new_linkup;
 105                 team_lower_state_changed(port);
 106         }
 107 }
 108
 109
 110 /*******************
 111  * Options handling
 112  *******************/
 113
 114 struct team_option_inst { /* One for each option instance */
 115         struct list_head list;
 116         struct list_head tmp_list;
 117         struct team_option *option;
 118         struct team_option_inst_info info;
 119         bool changed;
 120         bool removed;
 121 };
 122
 123 static struct team_option *__team_find_option(struct team *team,
 124                                               const char *opt_name)
 125 {
 126         struct team_option *option;
 127
 128         list_for_each_entry(option, &team->option_list, list) {
 129                 if (strcmp(option->name, opt_name) == 0)
 130                         return option;
 131         }
 132         return NULL;
 133 }
 134
 135 static void __team_option_inst_del(struct team_option_inst *opt_inst)
 136 {
 137         list_del(&opt_inst->list);
 138         kfree(opt_inst);
 139 }
 140
 141 static void __team_option_inst_del_option(struct team *team,
 142                                           struct team_option *option)
 143 {
 144         struct team_option_inst *opt_inst, *tmp;
 145
 146         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 147                 if (opt_inst->option == option)
 148                         __team_option_inst_del(opt_inst);
 149         }
 150 }
 151
 152 static int __team_option_inst_add(struct team *team, struct team_option *option,
 153                                   struct team_port *port)
 154 {
 155         struct team_option_inst *opt_inst;
 156         unsigned int array_size;
 157         unsigned int i;
 158         int err;
 159
 160         array_size = option->array_size;
 161         if (!array_size)
 162                 array_size = 1; /* No array but still need one instance */
 163
 164         for (i = 0; i < array_size; i++) {
 165                 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL);
 166                 if (!opt_inst)
 167                         return -ENOMEM;
 168                 opt_inst->option = option;
 169                 opt_inst->info.port = port;
 170                 opt_inst->info.array_index = i;
 171                 opt_inst->changed = true;
 172                 opt_inst->removed = false;
 173                 list_add_tail(&opt_inst->list, &team->option_inst_list);
 174                 if (option->init) {
 175                         err = option->init(team, &opt_inst->info);
 176                         if (err)
 177                                 return err;
 178                 }
 179
 180         }
 181         return 0;
 182 }
 183
 184 static int __team_option_inst_add_option(struct team *team,
 185                                          struct team_option *option)
 186 {
 187         int err;
 188
 189         if (!option->per_port) {
 190                 err = __team_option_inst_add(team, option, NULL);
 191                 if (err)
 192                         goto inst_del_option;
 193         }
 194         return 0;
 195
 196 inst_del_option:
 197         __team_option_inst_del_option(team, option);
 198         return err;
 199 }
 200
 201 static void __team_option_inst_mark_removed_option(struct team *team,
 202                                                    struct team_option *option)
 203 {
 204         struct team_option_inst *opt_inst;
 205
 206         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 207                 if (opt_inst->option == option) {
 208                         opt_inst->changed = true;
 209                         opt_inst->removed = true;
 210                 }
 211         }
 212 }
 213
 214 static void __team_option_inst_del_port(struct team *team,
 215                                         struct team_port *port)
 216 {
 217         struct team_option_inst *opt_inst, *tmp;
 218
 219         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 220                 if (opt_inst->option->per_port &&
 221                     opt_inst->info.port == port)
 222                         __team_option_inst_del(opt_inst);
 223         }
 224 }
 225
 226 static int __team_option_inst_add_port(struct team *team,
 227                                        struct team_port *port)
 228 {
 229         struct team_option *option;
 230         int err;
 231
 232         list_for_each_entry(option, &team->option_list, list) {
 233                 if (!option->per_port)
 234                         continue;
 235                 err = __team_option_inst_add(team, option, port);
 236                 if (err)
 237                         goto inst_del_port;
 238         }
 239         return 0;
 240
 241 inst_del_port:
 242         __team_option_inst_del_port(team, port);
 243         return err;
 244 }
 245
 246 static void __team_option_inst_mark_removed_port(struct team *team,
 247                                                  struct team_port *port)
 248 {
 249         struct team_option_inst *opt_inst;
 250
 251         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 252                 if (opt_inst->info.port == port) {
 253                         opt_inst->changed = true;
 254                         opt_inst->removed = true;
 255                 }
 256         }
 257 }
 258
 259 static int __team_options_register(struct team *team,
 260                                    const struct team_option *option,
 261                                    size_t option_count)
 262 {
 263         int i;
 264         struct team_option **dst_opts;
 265         int err;
 266
 267         dst_opts = kcalloc(option_count, sizeof(struct team_option *),
 268                            GFP_KERNEL);
 269         if (!dst_opts)
 270                 return -ENOMEM;
 271         for (i = 0; i < option_count; i++, option++) {
 272                 if (__team_find_option(team, option->name)) {
 273                         err = -EEXIST;
 274                         goto alloc_rollback;
 275                 }
 276                 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
 277                 if (!dst_opts[i]) {
 278                         err = -ENOMEM;
 279                         goto alloc_rollback;
 280                 }
 281         }
 282
 283         for (i = 0; i < option_count; i++) {
 284                 err = __team_option_inst_add_option(team, dst_opts[i]);
 285                 if (err)
 286                         goto inst_rollback;
 287                 list_add_tail(&dst_opts[i]->list, &team->option_list);
 288         }
 289
 290         kfree(dst_opts);
 291         return 0;
 292
 293 inst_rollback:
 294         for (i--; i >= 0; i--)
 295                 __team_option_inst_del_option(team, dst_opts[i]);
 296
 297         i = option_count;
 298 alloc_rollback:
 299         for (i--; i >= 0; i--)
 300                 kfree(dst_opts[i]);
 301
 302         kfree(dst_opts);
 303         return err;
 304 }
 305
 306 static void __team_options_mark_removed(struct team *team,
 307                                         const struct team_option *option,
 308                                         size_t option_count)
 309 {
 310         int i;
 311
 312         for (i = 0; i < option_count; i++, option++) {
 313                 struct team_option *del_opt;
 314
 315                 del_opt = __team_find_option(team, option->name);
 316                 if (del_opt)
 317                         __team_option_inst_mark_removed_option(team, del_opt);
 318         }
 319 }
 320
 321 static void __team_options_unregister(struct team *team,
 322                                       const struct team_option *option,
 323                                       size_t option_count)
 324 {
 325         int i;
 326
 327         for (i = 0; i < option_count; i++, option++) {
 328                 struct team_option *del_opt;
 329
 330                 del_opt = __team_find_option(team, option->name);
 331                 if (del_opt) {
 332                         __team_option_inst_del_option(team, del_opt);
 333                         list_del(&del_opt->list);
 334                         kfree(del_opt);
 335                 }
 336         }
 337 }
 338
 339 static void __team_options_change_check(struct team *team);
 340
 341 int team_options_register(struct team *team,
 342                           const struct team_option *option,
 343                           size_t option_count)
 344 {
 345         int err;
 346
 347         err = __team_options_register(team, option, option_count);
 348         if (err)
 349                 return err;
 350         __team_options_change_check(team);
 351         return 0;
 352 }
 353 EXPORT_SYMBOL(team_options_register);
 354
 355 void team_options_unregister(struct team *team,
 356                              const struct team_option *option,
 357                              size_t option_count)
 358 {
 359         __team_options_mark_removed(team, option, option_count);
 360         __team_options_change_check(team);
 361         __team_options_unregister(team, option, option_count);
 362 }
 363 EXPORT_SYMBOL(team_options_unregister);
 364
 365 static int team_option_get(struct team *team,
 366                            struct team_option_inst *opt_inst,
 367                            struct team_gsetter_ctx *ctx)
 368 {
 369         if (!opt_inst->option->getter)
 370                 return -EOPNOTSUPP;
 371         return opt_inst->option->getter(team, ctx);
 372 }
 373
 374 static int team_option_set(struct team *team,
 375                            struct team_option_inst *opt_inst,
 376                            struct team_gsetter_ctx *ctx)
 377 {
 378         if (!opt_inst->option->setter)
 379                 return -EOPNOTSUPP;
 380         return opt_inst->option->setter(team, ctx);
 381 }
 382
 383 void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info)
 384 {
 385         struct team_option_inst *opt_inst;
 386
 387         opt_inst = container_of(opt_inst_info, struct team_option_inst, info);
 388         opt_inst->changed = true;
 389 }
 390 EXPORT_SYMBOL(team_option_inst_set_change);
 391
 392 void team_options_change_check(struct team *team)
 393 {
 394         __team_options_change_check(team);
 395 }
 396 EXPORT_SYMBOL(team_options_change_check);
 397
 398
 399 /****************
 400  * Mode handling
 401  ****************/
 402
 403 static LIST_HEAD(mode_list);
 404 static DEFINE_SPINLOCK(mode_list_lock);
 405
 406 struct team_mode_item {
 407         struct list_head list;
 408         const struct team_mode *mode;
 409 };
 410
 411 static struct team_mode_item *__find_mode(const char *kind)
 412 {
 413         struct team_mode_item *mitem;
 414
 415         list_for_each_entry(mitem, &mode_list, list) {
 416                 if (strcmp(mitem->mode->kind, kind) == 0)
 417                         return mitem;
 418         }
 419         return NULL;
 420 }
 421
 422 static bool is_good_mode_name(const char *name)
 423 {
 424         while (*name != '\0') {
 425                 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
 426                         return false;
 427                 name++;
 428         }
 429         return true;
 430 }
 431
 432 int team_mode_register(const struct team_mode *mode)
 433 {
 434         int err = 0;
 435         struct team_mode_item *mitem;
 436
 437         if (!is_good_mode_name(mode->kind) ||
 438             mode->priv_size > TEAM_MODE_PRIV_SIZE)
 439                 return -EINVAL;
 440
 441         mitem = kmalloc(sizeof(*mitem), GFP_KERNEL);
 442         if (!mitem)
 443                 return -ENOMEM;
 444
 445         spin_lock(&mode_list_lock);
 446         if (__find_mode(mode->kind)) {
 447                 err = -EEXIST;
 448                 kfree(mitem);
 449                 goto unlock;
 450         }
 451         mitem->mode = mode;
 452         list_add_tail(&mitem->list, &mode_list);
 453 unlock:
 454         spin_unlock(&mode_list_lock);
 455         return err;
 456 }
 457 EXPORT_SYMBOL(team_mode_register);
 458
 459 void team_mode_unregister(const struct team_mode *mode)
 460 {
 461         struct team_mode_item *mitem;
 462
 463         spin_lock(&mode_list_lock);
 464         mitem = __find_mode(mode->kind);
 465         if (mitem) {
 466                 list_del_init(&mitem->list);
 467                 kfree(mitem);
 468         }
 469         spin_unlock(&mode_list_lock);
 470 }
 471 EXPORT_SYMBOL(team_mode_unregister);
 472
 473 static const struct team_mode *team_mode_get(const char *kind)
 474 {
 475         struct team_mode_item *mitem;
 476         const struct team_mode *mode = NULL;
 477
 478         if (!try_module_get(THIS_MODULE))
 479                 return NULL;
 480
 481         spin_lock(&mode_list_lock);
 482         mitem = __find_mode(kind);
 483         if (!mitem) {
 484                 spin_unlock(&mode_list_lock);
 485                 request_module("team-mode-%s", kind);
 486                 spin_lock(&mode_list_lock);
 487                 mitem = __find_mode(kind);
 488         }
 489         if (mitem) {
 490                 mode = mitem->mode;
 491                 if (!try_module_get(mode->owner))
 492                         mode = NULL;
 493         }
 494
 495         spin_unlock(&mode_list_lock);
 496         module_put(THIS_MODULE);
 497         return mode;
 498 }
 499
 500 static void team_mode_put(const struct team_mode *mode)
 501 {
 502         module_put(mode->owner);
 503 }
 504
 505 static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
 506 {
 507         dev_kfree_skb_any(skb);
 508         return false;
 509 }
 510
 511 static rx_handler_result_t team_dummy_receive(struct team *team,
 512                                               struct team_port *port,
 513                                               struct sk_buff *skb)
 514 {
 515         return RX_HANDLER_ANOTHER;
 516 }
 517
 518 static const struct team_mode __team_no_mode = {
 519         .kind           = "*NOMODE*",
 520 };
 521
 522 static bool team_is_mode_set(struct team *team)
 523 {
 524         return team->mode != &__team_no_mode;
 525 }
 526
 527 static void team_set_no_mode(struct team *team)
 528 {
 529         team->user_carrier_enabled = false;
 530         team->mode = &__team_no_mode;
 531 }
 532
 533 static void team_adjust_ops(struct team *team)
 534 {
 535         /*
 536          * To avoid checks in rx/tx skb paths, ensure here that non-null and
 537          * correct ops are always set.
 538          */
 539
 540         if (!team->en_port_count || !team_is_mode_set(team) ||
 541             !team->mode->ops->transmit)
 542                 team->ops.transmit = team_dummy_transmit;
 543         else
 544                 team->ops.transmit = team->mode->ops->transmit;
 545
 546         if (!team->en_port_count || !team_is_mode_set(team) ||
 547             !team->mode->ops->receive)
 548                 team->ops.receive = team_dummy_receive;
 549         else
 550                 team->ops.receive = team->mode->ops->receive;
 551 }
 552
 553 /*
 554  * We can benefit from the fact that it's ensured no port is present
 555  * at the time of mode change. Therefore no packets are in fly so there's no
 556  * need to set mode operations in any special way.
 557  */
 558 static int __team_change_mode(struct team *team,
 559                               const struct team_mode *new_mode)
 560 {
 561         /* Check if mode was previously set and do cleanup if so */
 562         if (team_is_mode_set(team)) {
 563                 void (*exit_op)(struct team *team) = team->ops.exit;
 564
 565                 /* Clear ops area so no callback is called any longer */
 566                 memset(&team->ops, 0, sizeof(struct team_mode_ops));
 567                 team_adjust_ops(team);
 568
 569                 if (exit_op)
 570                         exit_op(team);
 571                 team_mode_put(team->mode);
 572                 team_set_no_mode(team);
 573                 /* zero private data area */
 574                 memset(&team->mode_priv, 0,
 575                        sizeof(struct team) - offsetof(struct team, mode_priv));
 576         }
 577
 578         if (!new_mode)
 579                 return 0;
 580
 581         if (new_mode->ops->init) {
 582                 int err;
 583
 584                 err = new_mode->ops->init(team);
 585                 if (err)
 586                         return err;
 587         }
 588
 589         team->mode = new_mode;
 590         memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
 591         team_adjust_ops(team);
 592
 593         return 0;
 594 }
 595
 596 static int team_change_mode(struct team *team, const char *kind)
 597 {
 598         const struct team_mode *new_mode;
 599         struct net_device *dev = team->dev;
 600         int err;
 601
 602         if (!list_empty(&team->port_list)) {
 603                 netdev_err(dev, "No ports can be present during mode change\n");
 604                 return -EBUSY;
 605         }
 606
 607         if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) {
 608                 netdev_err(dev, "Unable to change to the same mode the team is in\n");
 609                 return -EINVAL;
 610         }
 611
 612         new_mode = team_mode_get(kind);
 613         if (!new_mode) {
 614                 netdev_err(dev, "Mode \"%s\" not found\n", kind);
 615                 return -EINVAL;
 616         }
 617
 618         err = __team_change_mode(team, new_mode);
 619         if (err) {
 620                 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
 621                 team_mode_put(new_mode);
 622                 return err;
 623         }
 624
 625         netdev_info(dev, "Mode changed to \"%s\"\n", kind);
 626         return 0;
 627 }
 628
 629
 630 /*********************
 631  * Peers notification
 632  *********************/
 633
 634 static void team_notify_peers_work(struct work_struct *work)
 635 {
 636         struct team *team;
 637         int val;
 638
 639         team = container_of(work, struct team, notify_peers.dw.work);
 640
 641         if (!rtnl_trylock()) {
 642                 schedule_delayed_work(&team->notify_peers.dw, 0);
 643                 return;
 644         }
 645         val = atomic_dec_if_positive(&team->notify_peers.count_pending);
 646         if (val < 0) {
 647                 rtnl_unlock();
 648                 return;
 649         }
 650         call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, team->dev);
 651         rtnl_unlock();
 652         if (val)
 653                 schedule_delayed_work(&team->notify_peers.dw,
 654                                       msecs_to_jiffies(team->notify_peers.interval));
 655 }
 656
 657 static void team_notify_peers(struct team *team)
 658 {
 659         if (!team->notify_peers.count || !netif_running(team->dev))
 660                 return;
 661         atomic_add(team->notify_peers.count, &team->notify_peers.count_pending);
 662         schedule_delayed_work(&team->notify_peers.dw, 0);
 663 }
 664
 665 static void team_notify_peers_init(struct team *team)
 666 {
 667         INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work);
 668 }
 669
 670 static void team_notify_peers_fini(struct team *team)
 671 {
 672         cancel_delayed_work_sync(&team->notify_peers.dw);
 673 }
 674
 675
 676 /*******************************
 677  * Send multicast group rejoins
 678  *******************************/
 679
 680 static void team_mcast_rejoin_work(struct work_struct *work)
 681 {
 682         struct team *team;
 683         int val;
 684
 685         team = container_of(work, struct team, mcast_rejoin.dw.work);
 686
 687         if (!rtnl_trylock()) {
 688                 schedule_delayed_work(&team->mcast_rejoin.dw, 0);
 689                 return;
 690         }
 691         val = atomic_dec_if_positive(&team->mcast_rejoin.count_pending);
 692         if (val < 0) {
 693                 rtnl_unlock();
 694                 return;
 695         }
 696         call_netdevice_notifiers(NETDEV_RESEND_IGMP, team->dev);
 697         rtnl_unlock();
 698         if (val)
 699                 schedule_delayed_work(&team->mcast_rejoin.dw,
 700                                       msecs_to_jiffies(team->mcast_rejoin.interval));
 701 }
 702
 703 static void team_mcast_rejoin(struct team *team)
 704 {
 705         if (!team->mcast_rejoin.count || !netif_running(team->dev))
 706                 return;
 707         atomic_add(team->mcast_rejoin.count, &team->mcast_rejoin.count_pending);
 708         schedule_delayed_work(&team->mcast_rejoin.dw, 0);
 709 }
 710
 711 static void team_mcast_rejoin_init(struct team *team)
 712 {
 713         INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work);
 714 }
 715
 716 static void team_mcast_rejoin_fini(struct team *team)
 717 {
 718         cancel_delayed_work_sync(&team->mcast_rejoin.dw);
 719 }
 720
 721
 722 /************************
 723  * Rx path frame handler
 724  ************************/
 725
 726 /* note: already called with rcu_read_lock */
 727 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
 728 {
 729         struct sk_buff *skb = *pskb;
 730         struct team_port *port;
 731         struct team *team;
 732         rx_handler_result_t res;
 733
 734         skb = skb_share_check(skb, GFP_ATOMIC);
 735         if (!skb)
 736                 return RX_HANDLER_CONSUMED;
 737
 738         *pskb = skb;
 739
 740         port = team_port_get_rcu(skb->dev);
 741         team = port->team;
 742         if (!team_port_enabled(port)) {
 743                 /* allow exact match delivery for disabled ports */
 744                 res = RX_HANDLER_EXACT;
 745         } else {
 746                 res = team->ops.receive(team, port, skb);
 747         }
 748         if (res == RX_HANDLER_ANOTHER) {
 749                 struct team_pcpu_stats *pcpu_stats;
 750
 751                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
 752                 u64_stats_update_begin(&pcpu_stats->syncp);
 753                 pcpu_stats->rx_packets++;
 754                 pcpu_stats->rx_bytes += skb->len;
 755                 if (skb->pkt_type == PACKET_MULTICAST)
 756                         pcpu_stats->rx_multicast++;
 757                 u64_stats_update_end(&pcpu_stats->syncp);
 758
 759                 skb->dev = team->dev;
 760         } else if (res == RX_HANDLER_EXACT) {
 761                 this_cpu_inc(team->pcpu_stats->rx_nohandler);
 762         } else {
 763                 this_cpu_inc(team->pcpu_stats->rx_dropped);
 764         }
 765
 766         return res;
 767 }
 768
 769
 770 /*************************************
 771  * Multiqueue Tx port select override
 772  *************************************/
 773
 774 static int team_queue_override_init(struct team *team)
 775 {
 776         struct list_head *listarr;
 777         unsigned int queue_cnt = team->dev->num_tx_queues - 1;
 778         unsigned int i;
 779
 780         if (!queue_cnt)
 781                 return 0;
 782         listarr = kmalloc_array(queue_cnt, sizeof(struct list_head),
 783                                 GFP_KERNEL);
 784         if (!listarr)
 785                 return -ENOMEM;
 786         team->qom_lists = listarr;
 787         for (i = 0; i < queue_cnt; i++)
 788                 INIT_LIST_HEAD(listarr++);
 789         return 0;
 790 }
 791
 792 static void team_queue_override_fini(struct team *team)
 793 {
 794         kfree(team->qom_lists);
 795 }
 796
 797 static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
 798 {
 799         return &team->qom_lists[queue_id - 1];
 800 }
 801
 802 /*
 803  * note: already called with rcu_read_lock
 804  */
 805 static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
 806 {
 807         struct list_head *qom_list;
 808         struct team_port *port;
 809
 810         if (!team->queue_override_enabled || !skb->queue_mapping)
 811                 return false;
 812         qom_list = __team_get_qom_list(team, skb->queue_mapping);
 813         list_for_each_entry_rcu(port, qom_list, qom_list) {
 814                 if (!team_dev_queue_xmit(team, port, skb))
 815                         return true;
 816         }
 817         return false;
 818 }
 819
 820 static void __team_queue_override_port_del(struct team *team,
 821                                            struct team_port *port)
 822 {
 823         if (!port->queue_id)
 824                 return;
 825         list_del_rcu(&port->qom_list);
 826 }
 827
 828 static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
 829                                                       struct team_port *cur)
 830 {
 831         if (port->priority < cur->priority)
 832                 return true;
 833         if (port->priority > cur->priority)
 834                 return false;
 835         if (port->index < cur->index)
 836                 return true;
 837         return false;
 838 }
 839
 840 static void __team_queue_override_port_add(struct team *team,
 841                                            struct team_port *port)
 842 {
 843         struct team_port *cur;
 844         struct list_head *qom_list;
 845         struct list_head *node;
 846
 847         if (!port->queue_id)
 848                 return;
 849         qom_list = __team_get_qom_list(team, port->queue_id);
 850         node = qom_list;
 851         list_for_each_entry(cur, qom_list, qom_list) {
 852                 if (team_queue_override_port_has_gt_prio_than(port, cur))
 853                         break;
 854                 node = &cur->qom_list;
 855         }
 856         list_add_tail_rcu(&port->qom_list, node);
 857 }
 858
 859 static void __team_queue_override_enabled_check(struct team *team)
 860 {
 861         struct team_port *port;
 862         bool enabled = false;
 863
 864         list_for_each_entry(port, &team->port_list, list) {
 865                 if (port->queue_id) {
 866                         enabled = true;
 867                         break;
 868                 }
 869         }
 870         if (enabled == team->queue_override_enabled)
 871                 return;
 872         netdev_dbg(team->dev, "%s queue override\n",
 873                    enabled ? "Enabling" : "Disabling");
 874         team->queue_override_enabled = enabled;
 875 }
 876
 877 static void team_queue_override_port_prio_changed(struct team *team,
 878                                                   struct team_port *port)
 879 {
 880         if (!port->queue_id || team_port_enabled(port))
 881                 return;
 882         __team_queue_override_port_del(team, port);
 883         __team_queue_override_port_add(team, port);
 884         __team_queue_override_enabled_check(team);
 885 }
 886
 887 static void team_queue_override_port_change_queue_id(struct team *team,
 888                                                      struct team_port *port,
 889                                                      u16 new_queue_id)
 890 {
 891         if (team_port_enabled(port)) {
 892                 __team_queue_override_port_del(team, port);
 893                 port->queue_id = new_queue_id;
 894                 __team_queue_override_port_add(team, port);
 895                 __team_queue_override_enabled_check(team);
 896         } else {
 897                 port->queue_id = new_queue_id;
 898         }
 899 }
 900
 901 static void team_queue_override_port_add(struct team *team,
 902                                          struct team_port *port)
 903 {
 904         __team_queue_override_port_add(team, port);
 905         __team_queue_override_enabled_check(team);
 906 }
 907
 908 static void team_queue_override_port_del(struct team *team,
 909                                          struct team_port *port)
 910 {
 911         __team_queue_override_port_del(team, port);
 912         __team_queue_override_enabled_check(team);
 913 }
 914
 915
 916 /****************
 917  * Port handling
 918  ****************/
 919
 920 static bool team_port_find(const struct team *team,
 921                            const struct team_port *port)
 922 {
 923         struct team_port *cur;
 924
 925         list_for_each_entry(cur, &team->port_list, list)
 926                 if (cur == port)
 927                         return true;
 928         return false;
 929 }
 930
 931 /*
 932  * Enable/disable port by adding to enabled port hashlist and setting
 933  * port->index (Might be racy so reader could see incorrect ifindex when
 934  * processing a flying packet, but that is not a problem). Write guarded
 935  * by team->lock.
 936  */
 937 static void team_port_enable(struct team *team,
 938                              struct team_port *port)
 939 {
 940         if (team_port_enabled(port))
 941                 return;
 942         port->index = team->en_port_count++;
 943         hlist_add_head_rcu(&port->hlist,
 944                            team_port_index_hash(team, port->index));
 945         team_adjust_ops(team);
 946         team_queue_override_port_add(team, port);
 947         if (team->ops.port_enabled)
 948                 team->ops.port_enabled(team, port);
 949         team_notify_peers(team);
 950         team_mcast_rejoin(team);
 951         team_lower_state_changed(port);
 952 }
 953
 954 static void __reconstruct_port_hlist(struct team *team, int rm_index)
 955 {
 956         int i;
 957         struct team_port *port;
 958
 959         for (i = rm_index + 1; i < team->en_port_count; i++) {
 960                 port = team_get_port_by_index(team, i);
 961                 hlist_del_rcu(&port->hlist);
 962                 port->index--;
 963                 hlist_add_head_rcu(&port->hlist,
 964                                    team_port_index_hash(team, port->index));
 965         }
 966 }
 967
 968 static void team_port_disable(struct team *team,
 969                               struct team_port *port)
 970 {
 971         if (!team_port_enabled(port))
 972                 return;
 973         if (team->ops.port_disabled)
 974                 team->ops.port_disabled(team, port);
 975         hlist_del_rcu(&port->hlist);
 976         __reconstruct_port_hlist(team, port->index);
 977         port->index = -1;
 978         team->en_port_count--;
 979         team_queue_override_port_del(team, port);
 980         team_adjust_ops(team);
 981         team_lower_state_changed(port);
 982 }
 983
 984 #define TEAM_VLAN_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
 985                             NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
 986                             NETIF_F_HIGHDMA | NETIF_F_LRO)
 987
 988 #define TEAM_ENC_FEATURES       (NETIF_F_HW_CSUM | NETIF_F_SG | \
 989                                  NETIF_F_RXCSUM | NETIF_F_ALL_TSO)
 990
 991 static void __team_compute_features(struct team *team)
 992 {
 993         struct team_port *port;
 994         netdev_features_t vlan_features = TEAM_VLAN_FEATURES &
 995                                           NETIF_F_ALL_FOR_ALL;
 996         netdev_features_t enc_features  = TEAM_ENC_FEATURES;
 997         unsigned short max_hard_header_len = ETH_HLEN;
 998         unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE |
 999                                         IFF_XMIT_DST_RELEASE_PERM;
1000
1001         rcu_read_lock();
1002         list_for_each_entry_rcu(port, &team->port_list, list) {
1003                 vlan_features = netdev_increment_features(vlan_features,
1004                                         port->dev->vlan_features,
1005                                         TEAM_VLAN_FEATURES);
1006                 enc_features =
1007                         netdev_increment_features(enc_features,
1008                                                   port->dev->hw_enc_features,
1009                                                   TEAM_ENC_FEATURES);
1010
1011
1012                 dst_release_flag &= port->dev->priv_flags;
1013                 if (port->dev->hard_header_len > max_hard_header_len)
1014                         max_hard_header_len = port->dev->hard_header_len;
1015         }
1016         rcu_read_unlock();
1017
1018         team->dev->vlan_features = vlan_features;
1019         team->dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL |
1020                                      NETIF_F_HW_VLAN_CTAG_TX |
1021                                      NETIF_F_HW_VLAN_STAG_TX |
1022                                      NETIF_F_GSO_UDP_L4;
1023         team->dev->hard_header_len = max_hard_header_len;
1024
1025         team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
1026         if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
1027                 team->dev->priv_flags |= IFF_XMIT_DST_RELEASE;
1028 }
1029
1030 static void team_compute_features(struct team *team)
1031 {
1032         __team_compute_features(team);
1033         netdev_change_features(team->dev);
1034 }
1035
1036 static int team_port_enter(struct team *team, struct team_port *port)
1037 {
1038         int err = 0;
1039
1040         dev_hold(team->dev);
1041         if (team->ops.port_enter) {
1042                 err = team->ops.port_enter(team, port);
1043                 if (err) {
1044                         netdev_err(team->dev, "Device %s failed to enter team mode\n",
1045                                    port->dev->name);
1046                         goto err_port_enter;
1047                 }
1048         }
1049
1050         return 0;
1051
1052 err_port_enter:
1053         dev_put(team->dev);
1054
1055         return err;
1056 }
1057
1058 static void team_port_leave(struct team *team, struct team_port *port)
1059 {
1060         if (team->ops.port_leave)
1061                 team->ops.port_leave(team, port);
1062         dev_put(team->dev);
1063 }
1064
1065 #ifdef CONFIG_NET_POLL_CONTROLLER
1066 static int __team_port_enable_netpoll(struct team_port *port)
1067 {
1068         struct netpoll *np;
1069         int err;
1070
1071         np = kzalloc(sizeof(*np), GFP_KERNEL);
1072         if (!np)
1073                 return -ENOMEM;
1074
1075         err = __netpoll_setup(np, port->dev);
1076         if (err) {
1077                 kfree(np);
1078                 return err;
1079         }
1080         port->np = np;
1081         return err;
1082 }
1083
1084 static int team_port_enable_netpoll(struct team_port *port)
1085 {
1086         if (!port->team->dev->npinfo)
1087                 return 0;
1088
1089         return __team_port_enable_netpoll(port);
1090 }
1091
1092 static void team_port_disable_netpoll(struct team_port *port)
1093 {
1094         struct netpoll *np = port->np;
1095
1096         if (!np)
1097                 return;
1098         port->np = NULL;
1099
1100         /* Wait for transmitting packets to finish before freeing. */
1101         synchronize_rcu_bh();
1102         __netpoll_cleanup(np);
1103         kfree(np);
1104 }
1105 #else
1106 static int team_port_enable_netpoll(struct team_port *port)
1107 {
1108         return 0;
1109 }
1110 static void team_port_disable_netpoll(struct team_port *port)
1111 {
1112 }
1113 #endif
1114
1115 static int team_upper_dev_link(struct team *team, struct team_port *port,
1116                                struct netlink_ext_ack *extack)
1117 {
1118         struct netdev_lag_upper_info lag_upper_info;
1119         int err;
1120
1121         lag_upper_info.tx_type = team->mode->lag_tx_type;
1122         lag_upper_info.hash_type = NETDEV_LAG_HASH_UNKNOWN;
1123         err = netdev_master_upper_dev_link(port->dev, team->dev, NULL,
1124                                            &lag_upper_info, extack);
1125         if (err)
1126                 return err;
1127         port->dev->priv_flags |= IFF_TEAM_PORT;
1128         return 0;
1129 }
1130
1131 static void team_upper_dev_unlink(struct team *team, struct team_port *port)
1132 {
1133         netdev_upper_dev_unlink(port->dev, team->dev);
1134         port->dev->priv_flags &= ~IFF_TEAM_PORT;
1135 }
1136
1137 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1138 static int team_dev_type_check_change(struct net_device *dev,
1139                                       struct net_device *port_dev);
1140
1141 static int team_port_add(struct team *team, struct net_device *port_dev,
1142                          struct netlink_ext_ack *extack)
1143 {
1144         struct net_device *dev = team->dev;
1145         struct team_port *port;
1146         char *portname = port_dev->name;
1147         int err;
1148
1149         if (port_dev->flags & IFF_LOOPBACK) {
1150                 NL_SET_ERR_MSG(extack, "Loopback device can't be added as a team port");
1151                 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1152                            portname);
1153                 return -EINVAL;
1154         }
1155
1156         if (team_port_exists(port_dev)) {
1157                 NL_SET_ERR_MSG(extack, "Device is already a port of a team device");
1158                 netdev_err(dev, "Device %s is already a port "
1159                                 "of a team device\n", portname);
1160                 return -EBUSY;
1161         }
1162
1163         if (dev == port_dev) {
1164                 NL_SET_ERR_MSG(extack, "Cannot enslave team device to itself");
1165                 netdev_err(dev, "Cannot enslave team device to itself\n");
1166                 return -EINVAL;
1167         }
1168
1169         if (netdev_has_upper_dev(dev, port_dev)) {
1170                 NL_SET_ERR_MSG(extack, "Device is already an upper device of the team interface");
1171                 netdev_err(dev, "Device %s is already an upper device of the team interface\n",
1172                            portname);
1173                 return -EBUSY;
1174         }
1175
1176         if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1177             vlan_uses_dev(dev)) {
1178                 NL_SET_ERR_MSG(extack, "Device is VLAN challenged and team device has VLAN set up");
1179                 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1180                            portname);
1181                 return -EPERM;
1182         }
1183
1184         err = team_dev_type_check_change(dev, port_dev);
1185         if (err)
1186                 return err;
1187
1188         if (port_dev->flags & IFF_UP) {
1189                 NL_SET_ERR_MSG(extack, "Device is up. Set it down before adding it as a team port");
1190                 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1191                            portname);
1192                 return -EBUSY;
1193         }
1194
1195         port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1196                        GFP_KERNEL);
1197         if (!port)
1198                 return -ENOMEM;
1199
1200         port->dev = port_dev;
1201         port->team = team;
1202         INIT_LIST_HEAD(&port->qom_list);
1203
1204         port->orig.mtu = port_dev->mtu;
1205         err = dev_set_mtu(port_dev, dev->mtu);
1206         if (err) {
1207                 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1208                 goto err_set_mtu;
1209         }
1210
1211         memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1212
1213         err = team_port_enter(team, port);
1214         if (err) {
1215                 netdev_err(dev, "Device %s failed to enter team mode\n",
1216                            portname);
1217                 goto err_port_enter;
1218         }
1219
1220         err = dev_open(port_dev);
1221         if (err) {
1222                 netdev_dbg(dev, "Device %s opening failed\n",
1223                            portname);
1224                 goto err_dev_open;
1225         }
1226
1227         err = vlan_vids_add_by_dev(port_dev, dev);
1228         if (err) {
1229                 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1230                                 portname);
1231                 goto err_vids_add;
1232         }
1233
1234         err = team_port_enable_netpoll(port);
1235         if (err) {
1236                 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1237                            portname);
1238                 goto err_enable_netpoll;
1239         }
1240
1241         if (!(dev->features & NETIF_F_LRO))
1242                 dev_disable_lro(port_dev);
1243
1244         err = netdev_rx_handler_register(port_dev, team_handle_frame,
1245                                          port);
1246         if (err) {
1247                 netdev_err(dev, "Device %s failed to register rx_handler\n",
1248                            portname);
1249                 goto err_handler_register;
1250         }
1251
1252         err = team_upper_dev_link(team, port, extack);
1253         if (err) {
1254                 netdev_err(dev, "Device %s failed to set upper link\n",
1255                            portname);
1256                 goto err_set_upper_link;
1257         }
1258
1259         err = __team_option_inst_add_port(team, port);
1260         if (err) {
1261                 netdev_err(dev, "Device %s failed to add per-port options\n",
1262                            portname);
1263                 goto err_option_port_add;
1264         }
1265
1266         /* set promiscuity level to new slave */
1267         if (dev->flags & IFF_PROMISC) {
1268                 err = dev_set_promiscuity(port_dev, 1);
1269                 if (err)
1270                         goto err_set_slave_promisc;
1271         }
1272
1273         /* set allmulti level to new slave */
1274         if (dev->flags & IFF_ALLMULTI) {
1275                 err = dev_set_allmulti(port_dev, 1);
1276                 if (err) {
1277                         if (dev->flags & IFF_PROMISC)
1278                                 dev_set_promiscuity(port_dev, -1);
1279                         goto err_set_slave_promisc;
1280                 }
1281         }
1282
1283         netif_addr_lock_bh(dev);
1284         dev_uc_sync_multiple(port_dev, dev);
1285         dev_mc_sync_multiple(port_dev, dev);
1286         netif_addr_unlock_bh(dev);
1287
1288         port->index = -1;
1289         list_add_tail_rcu(&port->list, &team->port_list);
1290         team_port_enable(team, port);
1291         __team_compute_features(team);
1292         __team_port_change_port_added(port, !!netif_oper_up(port_dev));
1293         __team_options_change_check(team);
1294
1295         netdev_info(dev, "Port device %s added\n", portname);
1296
1297         return 0;
1298
1299 err_set_slave_promisc:
1300         __team_option_inst_del_port(team, port);
1301
1302 err_option_port_add:
1303         team_upper_dev_unlink(team, port);
1304
1305 err_set_upper_link:
1306         netdev_rx_handler_unregister(port_dev);
1307
1308 err_handler_register:
1309         team_port_disable_netpoll(port);
1310
1311 err_enable_netpoll:
1312         vlan_vids_del_by_dev(port_dev, dev);
1313
1314 err_vids_add:
1315         dev_close(port_dev);
1316
1317 err_dev_open:
1318         team_port_leave(team, port);
1319         team_port_set_orig_dev_addr(port);
1320
1321 err_port_enter:
1322         dev_set_mtu(port_dev, port->orig.mtu);
1323
1324 err_set_mtu:
1325         kfree(port);
1326
1327         return err;
1328 }
1329
1330 static void __team_port_change_port_removed(struct team_port *port);
1331
1332 static int team_port_del(struct team *team, struct net_device *port_dev)
1333 {
1334         struct net_device *dev = team->dev;
1335         struct team_port *port;
1336         char *portname = port_dev->name;
1337
1338         port = team_port_get_rtnl(port_dev);
1339         if (!port || !team_port_find(team, port)) {
1340                 netdev_err(dev, "Device %s does not act as a port of this team\n",
1341                            portname);
1342                 return -ENOENT;
1343         }
1344
1345         team_port_disable(team, port);
1346         list_del_rcu(&port->list);
1347
1348         if (dev->flags & IFF_PROMISC)
1349                 dev_set_promiscuity(port_dev, -1);
1350         if (dev->flags & IFF_ALLMULTI)
1351                 dev_set_allmulti(port_dev, -1);
1352
1353         team_upper_dev_unlink(team, port);
1354         netdev_rx_handler_unregister(port_dev);
1355         team_port_disable_netpoll(port);
1356         vlan_vids_del_by_dev(port_dev, dev);
1357         dev_uc_unsync(port_dev, dev);
1358         dev_mc_unsync(port_dev, dev);
1359         dev_close(port_dev);
1360         team_port_leave(team, port);
1361
1362         __team_option_inst_mark_removed_port(team, port);
1363         __team_options_change_check(team);
1364         __team_option_inst_del_port(team, port);
1365         __team_port_change_port_removed(port);
1366
1367         team_port_set_orig_dev_addr(port);
1368         dev_set_mtu(port_dev, port->orig.mtu);
1369         kfree_rcu(port, rcu);
1370         netdev_info(dev, "Port device %s removed\n", portname);
1371         __team_compute_features(team);
1372
1373         return 0;
1374 }
1375
1376
1377 /*****************
1378  * Net device ops
1379  *****************/
1380
1381 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1382 {
1383         ctx->data.str_val = team->mode->kind;
1384         return 0;
1385 }
1386
1387 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1388 {
1389         return team_change_mode(team, ctx->data.str_val);
1390 }
1391
1392 static int team_notify_peers_count_get(struct team *team,
1393                                        struct team_gsetter_ctx *ctx)
1394 {
1395         ctx->data.u32_val = team->notify_peers.count;
1396         return 0;
1397 }
1398
1399 static int team_notify_peers_count_set(struct team *team,
1400                                        struct team_gsetter_ctx *ctx)
1401 {
1402         team->notify_peers.count = ctx->data.u32_val;
1403         return 0;
1404 }
1405
1406 static int team_notify_peers_interval_get(struct team *team,
1407                                           struct team_gsetter_ctx *ctx)
1408 {
1409         ctx->data.u32_val = team->notify_peers.interval;
1410         return 0;
1411 }
1412
1413 static int team_notify_peers_interval_set(struct team *team,
1414                                           struct team_gsetter_ctx *ctx)
1415 {
1416         team->notify_peers.interval = ctx->data.u32_val;
1417         return 0;
1418 }
1419
1420 static int team_mcast_rejoin_count_get(struct team *team,
1421                                        struct team_gsetter_ctx *ctx)
1422 {
1423         ctx->data.u32_val = team->mcast_rejoin.count;
1424         return 0;
1425 }
1426
1427 static int team_mcast_rejoin_count_set(struct team *team,
1428                                        struct team_gsetter_ctx *ctx)
1429 {
1430         team->mcast_rejoin.count = ctx->data.u32_val;
1431         return 0;
1432 }
1433
1434 static int team_mcast_rejoin_interval_get(struct team *team,
1435                                           struct team_gsetter_ctx *ctx)
1436 {
1437         ctx->data.u32_val = team->mcast_rejoin.interval;
1438         return 0;
1439 }
1440
1441 static int team_mcast_rejoin_interval_set(struct team *team,
1442                                           struct team_gsetter_ctx *ctx)
1443 {
1444         team->mcast_rejoin.interval = ctx->data.u32_val;
1445         return 0;
1446 }
1447
1448 static int team_port_en_option_get(struct team *team,
1449                                    struct team_gsetter_ctx *ctx)
1450 {
1451         struct team_port *port = ctx->info->port;
1452
1453         ctx->data.bool_val = team_port_enabled(port);
1454         return 0;
1455 }
1456
1457 static int team_port_en_option_set(struct team *team,
1458                                    struct team_gsetter_ctx *ctx)
1459 {
1460         struct team_port *port = ctx->info->port;
1461
1462         if (ctx->data.bool_val)
1463                 team_port_enable(team, port);
1464         else
1465                 team_port_disable(team, port);
1466         return 0;
1467 }
1468
1469 static int team_user_linkup_option_get(struct team *team,
1470                                        struct team_gsetter_ctx *ctx)
1471 {
1472         struct team_port *port = ctx->info->port;
1473
1474         ctx->data.bool_val = port->user.linkup;
1475         return 0;
1476 }
1477
1478 static void __team_carrier_check(struct team *team);
1479
1480 static int team_user_linkup_option_set(struct team *team,
1481                                        struct team_gsetter_ctx *ctx)
1482 {
1483         struct team_port *port = ctx->info->port;
1484
1485         port->user.linkup = ctx->data.bool_val;
1486         team_refresh_port_linkup(port);
1487         __team_carrier_check(port->team);
1488         return 0;
1489 }
1490
1491 static int team_user_linkup_en_option_get(struct team *team,
1492                                           struct team_gsetter_ctx *ctx)
1493 {
1494         struct team_port *port = ctx->info->port;
1495
1496         ctx->data.bool_val = port->user.linkup_enabled;
1497         return 0;
1498 }
1499
1500 static int team_user_linkup_en_option_set(struct team *team,
1501                                           struct team_gsetter_ctx *ctx)
1502 {
1503         struct team_port *port = ctx->info->port;
1504
1505         port->user.linkup_enabled = ctx->data.bool_val;
1506         team_refresh_port_linkup(port);
1507         __team_carrier_check(port->team);
1508         return 0;
1509 }
1510
1511 static int team_priority_option_get(struct team *team,
1512                                     struct team_gsetter_ctx *ctx)
1513 {
1514         struct team_port *port = ctx->info->port;
1515
1516         ctx->data.s32_val = port->priority;
1517         return 0;
1518 }
1519
1520 static int team_priority_option_set(struct team *team,
1521                                     struct team_gsetter_ctx *ctx)
1522 {
1523         struct team_port *port = ctx->info->port;
1524         s32 priority = ctx->data.s32_val;
1525
1526         if (port->priority == priority)
1527                 return 0;
1528         port->priority = priority;
1529         team_queue_override_port_prio_changed(team, port);
1530         return 0;
1531 }
1532
1533 static int team_queue_id_option_get(struct team *team,
1534                                     struct team_gsetter_ctx *ctx)
1535 {
1536         struct team_port *port = ctx->info->port;
1537
1538         ctx->data.u32_val = port->queue_id;
1539         return 0;
1540 }
1541
1542 static int team_queue_id_option_set(struct team *team,
1543                                     struct team_gsetter_ctx *ctx)
1544 {
1545         struct team_port *port = ctx->info->port;
1546         u16 new_queue_id = ctx->data.u32_val;
1547
1548         if (port->queue_id == new_queue_id)
1549                 return 0;
1550         if (new_queue_id >= team->dev->real_num_tx_queues)
1551                 return -EINVAL;
1552         team_queue_override_port_change_queue_id(team, port, new_queue_id);
1553         return 0;
1554 }
1555
1556 static const struct team_option team_options[] = {
1557         {
1558                 .name = "mode",
1559                 .type = TEAM_OPTION_TYPE_STRING,
1560                 .getter = team_mode_option_get,
1561                 .setter = team_mode_option_set,
1562         },
1563         {
1564                 .name = "notify_peers_count",
1565                 .type = TEAM_OPTION_TYPE_U32,
1566                 .getter = team_notify_peers_count_get,
1567                 .setter = team_notify_peers_count_set,
1568         },
1569         {
1570                 .name = "notify_peers_interval",
1571                 .type = TEAM_OPTION_TYPE_U32,
1572                 .getter = team_notify_peers_interval_get,
1573                 .setter = team_notify_peers_interval_set,
1574         },
1575         {
1576                 .name = "mcast_rejoin_count",
1577                 .type = TEAM_OPTION_TYPE_U32,
1578                 .getter = team_mcast_rejoin_count_get,
1579                 .setter = team_mcast_rejoin_count_set,
1580         },
1581         {
1582                 .name = "mcast_rejoin_interval",
1583                 .type = TEAM_OPTION_TYPE_U32,
1584                 .getter = team_mcast_rejoin_interval_get,
1585                 .setter = team_mcast_rejoin_interval_set,
1586         },
1587         {
1588                 .name = "enabled",
1589                 .type = TEAM_OPTION_TYPE_BOOL,
1590                 .per_port = true,
1591                 .getter = team_port_en_option_get,
1592                 .setter = team_port_en_option_set,
1593         },
1594         {
1595                 .name = "user_linkup",
1596                 .type = TEAM_OPTION_TYPE_BOOL,
1597                 .per_port = true,
1598                 .getter = team_user_linkup_option_get,
1599                 .setter = team_user_linkup_option_set,
1600         },
1601         {
1602                 .name = "user_linkup_enabled",
1603                 .type = TEAM_OPTION_TYPE_BOOL,
1604                 .per_port = true,
1605                 .getter = team_user_linkup_en_option_get,
1606                 .setter = team_user_linkup_en_option_set,
1607         },
1608         {
1609                 .name = "priority",
1610                 .type = TEAM_OPTION_TYPE_S32,
1611                 .per_port = true,
1612                 .getter = team_priority_option_get,
1613                 .setter = team_priority_option_set,
1614         },
1615         {
1616                 .name = "queue_id",
1617                 .type = TEAM_OPTION_TYPE_U32,
1618                 .per_port = true,
1619                 .getter = team_queue_id_option_get,
1620                 .setter = team_queue_id_option_set,
1621         },
1622 };
1623
1624
1625 static int team_init(struct net_device *dev)
1626 {
1627         struct team *team = netdev_priv(dev);
1628         int i;
1629         int err;
1630
1631         team->dev = dev;
1632         mutex_init(&team->lock);
1633         team_set_no_mode(team);
1634
1635         team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1636         if (!team->pcpu_stats)
1637                 return -ENOMEM;
1638
1639         for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1640                 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1641         INIT_LIST_HEAD(&team->port_list);
1642         err = team_queue_override_init(team);
1643         if (err)
1644                 goto err_team_queue_override_init;
1645
1646         team_adjust_ops(team);
1647
1648         INIT_LIST_HEAD(&team->option_list);
1649         INIT_LIST_HEAD(&team->option_inst_list);
1650
1651         team_notify_peers_init(team);
1652         team_mcast_rejoin_init(team);
1653
1654         err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1655         if (err)
1656                 goto err_options_register;
1657         netif_carrier_off(dev);
1658
1659         netdev_lockdep_set_classes(dev);
1660
1661         return 0;
1662
1663 err_options_register:
1664         team_mcast_rejoin_fini(team);
1665         team_notify_peers_fini(team);
1666         team_queue_override_fini(team);
1667 err_team_queue_override_init:
1668         free_percpu(team->pcpu_stats);
1669
1670         return err;
1671 }
1672
1673 static void team_uninit(struct net_device *dev)
1674 {
1675         struct team *team = netdev_priv(dev);
1676         struct team_port *port;
1677         struct team_port *tmp;
1678
1679         mutex_lock(&team->lock);
1680         list_for_each_entry_safe(port, tmp, &team->port_list, list)
1681                 team_port_del(team, port->dev);
1682
1683         __team_change_mode(team, NULL); /* cleanup */
1684         __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1685         team_mcast_rejoin_fini(team);
1686         team_notify_peers_fini(team);
1687         team_queue_override_fini(team);
1688         mutex_unlock(&team->lock);
1689         netdev_change_features(dev);
1690 }
1691
1692 static void team_destructor(struct net_device *dev)
1693 {
1694         struct team *team = netdev_priv(dev);
1695
1696         free_percpu(team->pcpu_stats);
1697 }
1698
1699 static int team_open(struct net_device *dev)
1700 {
1701         return 0;
1702 }
1703
1704 static int team_close(struct net_device *dev)
1705 {
1706         return 0;
1707 }
1708
1709 /*
1710  * note: already called with rcu_read_lock
1711  */
1712 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1713 {
1714         struct team *team = netdev_priv(dev);
1715         bool tx_success;
1716         unsigned int len = skb->len;
1717
1718         tx_success = team_queue_override_transmit(team, skb);
1719         if (!tx_success)
1720                 tx_success = team->ops.transmit(team, skb);
1721         if (tx_success) {
1722                 struct team_pcpu_stats *pcpu_stats;
1723
1724                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1725                 u64_stats_update_begin(&pcpu_stats->syncp);
1726                 pcpu_stats->tx_packets++;
1727                 pcpu_stats->tx_bytes += len;
1728                 u64_stats_update_end(&pcpu_stats->syncp);
1729         } else {
1730                 this_cpu_inc(team->pcpu_stats->tx_dropped);
1731         }
1732
1733         return NETDEV_TX_OK;
1734 }
1735
1736 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1737                              struct net_device *sb_dev,
1738                              select_queue_fallback_t fallback)
1739 {
1740         /*
1741          * This helper function exists to help dev_pick_tx get the correct
1742          * destination queue.  Using a helper function skips a call to
1743          * skb_tx_hash and will put the skbs in the queue we expect on their
1744          * way down to the team driver.
1745          */
1746         u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1747
1748         /*
1749          * Save the original txq to restore before passing to the driver
1750          */
1751         qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1752
1753         if (unlikely(txq >= dev->real_num_tx_queues)) {
1754                 do {
1755                         txq -= dev->real_num_tx_queues;
1756                 } while (txq >= dev->real_num_tx_queues);
1757         }
1758         return txq;
1759 }
1760
1761 static void team_change_rx_flags(struct net_device *dev, int change)
1762 {
1763         struct team *team = netdev_priv(dev);
1764         struct team_port *port;
1765         int inc;
1766
1767         rcu_read_lock();
1768         list_for_each_entry_rcu(port, &team->port_list, list) {
1769                 if (change & IFF_PROMISC) {
1770                         inc = dev->flags & IFF_PROMISC ? 1 : -1;
1771                         dev_set_promiscuity(port->dev, inc);
1772                 }
1773                 if (change & IFF_ALLMULTI) {
1774                         inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1775                         dev_set_allmulti(port->dev, inc);
1776                 }
1777         }
1778         rcu_read_unlock();
1779 }
1780
1781 static void team_set_rx_mode(struct net_device *dev)
1782 {
1783         struct team *team = netdev_priv(dev);
1784         struct team_port *port;
1785
1786         rcu_read_lock();
1787         list_for_each_entry_rcu(port, &team->port_list, list) {
1788                 dev_uc_sync_multiple(port->dev, dev);
1789                 dev_mc_sync_multiple(port->dev, dev);
1790         }
1791         rcu_read_unlock();
1792 }
1793
1794 static int team_set_mac_address(struct net_device *dev, void *p)
1795 {
1796         struct sockaddr *addr = p;
1797         struct team *team = netdev_priv(dev);
1798         struct team_port *port;
1799
1800         if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1801                 return -EADDRNOTAVAIL;
1802         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1803         mutex_lock(&team->lock);
1804         list_for_each_entry(port, &team->port_list, list)
1805                 if (team->ops.port_change_dev_addr)
1806                         team->ops.port_change_dev_addr(team, port);
1807         mutex_unlock(&team->lock);
1808         return 0;
1809 }
1810
1811 static int team_change_mtu(struct net_device *dev, int new_mtu)
1812 {
1813         struct team *team = netdev_priv(dev);
1814         struct team_port *port;
1815         int err;
1816
1817         /*
1818          * Alhough this is reader, it's guarded by team lock. It's not possible
1819          * to traverse list in reverse under rcu_read_lock
1820          */
1821         mutex_lock(&team->lock);
1822         team->port_mtu_change_allowed = true;
1823         list_for_each_entry(port, &team->port_list, list) {
1824                 err = dev_set_mtu(port->dev, new_mtu);
1825                 if (err) {
1826                         netdev_err(dev, "Device %s failed to change mtu",
1827                                    port->dev->name);
1828                         goto unwind;
1829                 }
1830         }
1831         team->port_mtu_change_allowed = false;
1832         mutex_unlock(&team->lock);
1833
1834         dev->mtu = new_mtu;
1835
1836         return 0;
1837
1838 unwind:
1839         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1840                 dev_set_mtu(port->dev, dev->mtu);
1841         team->port_mtu_change_allowed = false;
1842         mutex_unlock(&team->lock);
1843
1844         return err;
1845 }
1846
1847 static void
1848 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1849 {
1850         struct team *team = netdev_priv(dev);
1851         struct team_pcpu_stats *p;
1852         u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1853         u32 rx_dropped = 0, tx_dropped = 0, rx_nohandler = 0;
1854         unsigned int start;
1855         int i;
1856
1857         for_each_possible_cpu(i) {
1858                 p = per_cpu_ptr(team->pcpu_stats, i);
1859                 do {
1860                         start = u64_stats_fetch_begin_irq(&p->syncp);
1861                         rx_packets      = p->rx_packets;
1862                         rx_bytes        = p->rx_bytes;
1863                         rx_multicast    = p->rx_multicast;
1864                         tx_packets      = p->tx_packets;
1865                         tx_bytes        = p->tx_bytes;
1866                 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
1867
1868                 stats->rx_packets       += rx_packets;
1869                 stats->rx_bytes         += rx_bytes;
1870                 stats->multicast        += rx_multicast;
1871                 stats->tx_packets       += tx_packets;
1872                 stats->tx_bytes         += tx_bytes;
1873                 /*
1874                  * rx_dropped, tx_dropped & rx_nohandler are u32,
1875                  * updated without syncp protection.
1876                  */
1877                 rx_dropped      += p->rx_dropped;
1878                 tx_dropped      += p->tx_dropped;
1879                 rx_nohandler    += p->rx_nohandler;
1880         }
1881         stats->rx_dropped       = rx_dropped;
1882         stats->tx_dropped       = tx_dropped;
1883         stats->rx_nohandler     = rx_nohandler;
1884 }
1885
1886 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1887 {
1888         struct team *team = netdev_priv(dev);
1889         struct team_port *port;
1890         int err;
1891
1892         /*
1893          * Alhough this is reader, it's guarded by team lock. It's not possible
1894          * to traverse list in reverse under rcu_read_lock
1895          */
1896         mutex_lock(&team->lock);
1897         list_for_each_entry(port, &team->port_list, list) {
1898                 err = vlan_vid_add(port->dev, proto, vid);
1899                 if (err)
1900                         goto unwind;
1901         }
1902         mutex_unlock(&team->lock);
1903
1904         return 0;
1905
1906 unwind:
1907         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1908                 vlan_vid_del(port->dev, proto, vid);
1909         mutex_unlock(&team->lock);
1910
1911         return err;
1912 }
1913
1914 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1915 {
1916         struct team *team = netdev_priv(dev);
1917         struct team_port *port;
1918
1919         mutex_lock(&team->lock);
1920         list_for_each_entry(port, &team->port_list, list)
1921                 vlan_vid_del(port->dev, proto, vid);
1922         mutex_unlock(&team->lock);
1923
1924         return 0;
1925 }
1926
1927 #ifdef CONFIG_NET_POLL_CONTROLLER
1928 static void team_poll_controller(struct net_device *dev)
1929 {
1930 }
1931
1932 static void __team_netpoll_cleanup(struct team *team)
1933 {
1934         struct team_port *port;
1935
1936         list_for_each_entry(port, &team->port_list, list)
1937                 team_port_disable_netpoll(port);
1938 }
1939
1940 static void team_netpoll_cleanup(struct net_device *dev)
1941 {
1942         struct team *team = netdev_priv(dev);
1943
1944         mutex_lock(&team->lock);
1945         __team_netpoll_cleanup(team);
1946         mutex_unlock(&team->lock);
1947 }
1948
1949 static int team_netpoll_setup(struct net_device *dev,
1950                               struct netpoll_info *npifo)
1951 {
1952         struct team *team = netdev_priv(dev);
1953         struct team_port *port;
1954         int err = 0;
1955
1956         mutex_lock(&team->lock);
1957         list_for_each_entry(port, &team->port_list, list) {
1958                 err = __team_port_enable_netpoll(port);
1959                 if (err) {
1960                         __team_netpoll_cleanup(team);
1961                         break;
1962                 }
1963         }
1964         mutex_unlock(&team->lock);
1965         return err;
1966 }
1967 #endif
1968
1969 static int team_add_slave(struct net_device *dev, struct net_device *port_dev,
1970                           struct netlink_ext_ack *extack)
1971 {
1972         struct team *team = netdev_priv(dev);
1973         int err;
1974
1975         mutex_lock(&team->lock);
1976         err = team_port_add(team, port_dev, extack);
1977         mutex_unlock(&team->lock);
1978
1979         if (!err)
1980                 netdev_change_features(dev);
1981
1982         return err;
1983 }
1984
1985 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1986 {
1987         struct team *team = netdev_priv(dev);
1988         int err;
1989
1990         mutex_lock(&team->lock);
1991         err = team_port_del(team, port_dev);
1992         mutex_unlock(&team->lock);
1993
1994         if (!err)
1995                 netdev_change_features(dev);
1996
1997         return err;
1998 }
1999
2000 static netdev_features_t team_fix_features(struct net_device *dev,
2001                                            netdev_features_t features)
2002 {
2003         struct team_port *port;
2004         struct team *team = netdev_priv(dev);
2005         netdev_features_t mask;
2006
2007         mask = features;
2008         features &= ~NETIF_F_ONE_FOR_ALL;
2009         features |= NETIF_F_ALL_FOR_ALL;
2010
2011         rcu_read_lock();
2012         list_for_each_entry_rcu(port, &team->port_list, list) {
2013                 features = netdev_increment_features(features,
2014                                                      port->dev->features,
2015                                                      mask);
2016         }
2017         rcu_read_unlock();
2018
2019         features = netdev_add_tso_features(features, mask);
2020
2021         return features;
2022 }
2023
2024 static int team_change_carrier(struct net_device *dev, bool new_carrier)
2025 {
2026         struct team *team = netdev_priv(dev);
2027
2028         team->user_carrier_enabled = true;
2029
2030         if (new_carrier)
2031                 netif_carrier_on(dev);
2032         else
2033                 netif_carrier_off(dev);
2034         return 0;
2035 }
2036
2037 static const struct net_device_ops team_netdev_ops = {
2038         .ndo_init               = team_init,
2039         .ndo_uninit             = team_uninit,
2040         .ndo_open               = team_open,
2041         .ndo_stop               = team_close,
2042         .ndo_start_xmit         = team_xmit,
2043         .ndo_select_queue       = team_select_queue,
2044         .ndo_change_rx_flags    = team_change_rx_flags,
2045         .ndo_set_rx_mode        = team_set_rx_mode,
2046         .ndo_set_mac_address    = team_set_mac_address,
2047         .ndo_change_mtu         = team_change_mtu,
2048         .ndo_get_stats64        = team_get_stats64,
2049         .ndo_vlan_rx_add_vid    = team_vlan_rx_add_vid,
2050         .ndo_vlan_rx_kill_vid   = team_vlan_rx_kill_vid,
2051 #ifdef CONFIG_NET_POLL_CONTROLLER
2052         .ndo_poll_controller    = team_poll_controller,
2053         .ndo_netpoll_setup      = team_netpoll_setup,
2054         .ndo_netpoll_cleanup    = team_netpoll_cleanup,
2055 #endif
2056         .ndo_add_slave          = team_add_slave,
2057         .ndo_del_slave          = team_del_slave,
2058         .ndo_fix_features       = team_fix_features,
2059         .ndo_change_carrier     = team_change_carrier,
2060         .ndo_features_check     = passthru_features_check,
2061 };
2062
2063 /***********************
2064  * ethtool interface
2065  ***********************/
2066
2067 static void team_ethtool_get_drvinfo(struct net_device *dev,
2068                                      struct ethtool_drvinfo *drvinfo)
2069 {
2070         strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
2071         strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2072 }
2073
2074 static const struct ethtool_ops team_ethtool_ops = {
2075         .get_drvinfo            = team_ethtool_get_drvinfo,
2076         .get_link               = ethtool_op_get_link,
2077 };
2078
2079 /***********************
2080  * rt netlink interface
2081  ***********************/
2082
2083 static void team_setup_by_port(struct net_device *dev,
2084                                struct net_device *port_dev)
2085 {
2086         dev->header_ops = port_dev->header_ops;
2087         dev->type = port_dev->type;
2088         dev->hard_header_len = port_dev->hard_header_len;
2089         dev->needed_headroom = port_dev->needed_headroom;
2090         dev->addr_len = port_dev->addr_len;
2091         dev->mtu = port_dev->mtu;
2092         memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2093         eth_hw_addr_inherit(dev, port_dev);
2094 }
2095
2096 static int team_dev_type_check_change(struct net_device *dev,
2097                                       struct net_device *port_dev)
2098 {
2099         struct team *team = netdev_priv(dev);
2100         char *portname = port_dev->name;
2101         int err;
2102
2103         if (dev->type == port_dev->type)
2104                 return 0;
2105         if (!list_empty(&team->port_list)) {
2106                 netdev_err(dev, "Device %s is of different type\n", portname);
2107                 return -EBUSY;
2108         }
2109         err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2110         err = notifier_to_errno(err);
2111         if (err) {
2112                 netdev_err(dev, "Refused to change device type\n");
2113                 return err;
2114         }
2115         dev_uc_flush(dev);
2116         dev_mc_flush(dev);
2117         team_setup_by_port(dev, port_dev);
2118         call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2119         return 0;
2120 }
2121
2122 static void team_setup(struct net_device *dev)
2123 {
2124         ether_setup(dev);
2125         dev->max_mtu = ETH_MAX_MTU;
2126
2127         dev->netdev_ops = &team_netdev_ops;
2128         dev->ethtool_ops = &team_ethtool_ops;
2129         dev->needs_free_netdev = true;
2130         dev->priv_destructor = team_destructor;
2131         dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2132         dev->priv_flags |= IFF_NO_QUEUE;
2133         dev->priv_flags |= IFF_TEAM;
2134
2135         /*
2136          * Indicate we support unicast address filtering. That way core won't
2137          * bring us to promisc mode in case a unicast addr is added.
2138          * Let this up to underlay drivers.
2139          */
2140         dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2141
2142         dev->features |= NETIF_F_LLTX;
2143         dev->features |= NETIF_F_GRO;
2144
2145         /* Don't allow team devices to change network namespaces. */
2146         dev->features |= NETIF_F_NETNS_LOCAL;
2147
2148         dev->hw_features = TEAM_VLAN_FEATURES |
2149                            NETIF_F_HW_VLAN_CTAG_RX |
2150                            NETIF_F_HW_VLAN_CTAG_FILTER;
2151
2152         dev->hw_features |= NETIF_F_GSO_ENCAP_ALL | NETIF_F_GSO_UDP_L4;
2153         dev->features |= dev->hw_features;
2154         dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
2155 }
2156
2157 static int team_newlink(struct net *src_net, struct net_device *dev,
2158                         struct nlattr *tb[], struct nlattr *data[],
2159                         struct netlink_ext_ack *extack)
2160 {
2161         if (tb[IFLA_ADDRESS] == NULL)
2162                 eth_hw_addr_random(dev);
2163
2164         return register_netdevice(dev);
2165 }
2166
2167 static int team_validate(struct nlattr *tb[], struct nlattr *data[],
2168                          struct netlink_ext_ack *extack)
2169 {
2170         if (tb[IFLA_ADDRESS]) {
2171                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2172                         return -EINVAL;
2173                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2174                         return -EADDRNOTAVAIL;
2175         }
2176         return 0;
2177 }
2178
2179 static unsigned int team_get_num_tx_queues(void)
2180 {
2181         return TEAM_DEFAULT_NUM_TX_QUEUES;
2182 }
2183
2184 static unsigned int team_get_num_rx_queues(void)
2185 {
2186         return TEAM_DEFAULT_NUM_RX_QUEUES;
2187 }
2188
2189 static struct rtnl_link_ops team_link_ops __read_mostly = {
2190         .kind                   = DRV_NAME,
2191         .priv_size              = sizeof(struct team),
2192         .setup                  = team_setup,
2193         .newlink                = team_newlink,
2194         .validate               = team_validate,
2195         .get_num_tx_queues      = team_get_num_tx_queues,
2196         .get_num_rx_queues      = team_get_num_rx_queues,
2197 };
2198
2199
2200 /***********************************
2201  * Generic netlink custom interface
2202  ***********************************/
2203
2204 static struct genl_family team_nl_family;
2205
2206 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2207         [TEAM_ATTR_UNSPEC]                      = { .type = NLA_UNSPEC, },
2208         [TEAM_ATTR_TEAM_IFINDEX]                = { .type = NLA_U32 },
2209         [TEAM_ATTR_LIST_OPTION]                 = { .type = NLA_NESTED },
2210         [TEAM_ATTR_LIST_PORT]                   = { .type = NLA_NESTED },
2211 };
2212
2213 static const struct nla_policy
2214 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2215         [TEAM_ATTR_OPTION_UNSPEC]               = { .type = NLA_UNSPEC, },
2216         [TEAM_ATTR_OPTION_NAME] = {
2217                 .type = NLA_STRING,
2218                 .len = TEAM_STRING_MAX_LEN,
2219         },
2220         [TEAM_ATTR_OPTION_CHANGED]              = { .type = NLA_FLAG },
2221         [TEAM_ATTR_OPTION_TYPE]                 = { .type = NLA_U8 },
2222         [TEAM_ATTR_OPTION_DATA]                 = { .type = NLA_BINARY },
2223         [TEAM_ATTR_OPTION_PORT_IFINDEX]         = { .type = NLA_U32 },
2224         [TEAM_ATTR_OPTION_ARRAY_INDEX]          = { .type = NLA_U32 },
2225 };
2226
2227 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2228 {
2229         struct sk_buff *msg;
2230         void *hdr;
2231         int err;
2232
2233         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2234         if (!msg)
2235                 return -ENOMEM;
2236
2237         hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2238                           &team_nl_family, 0, TEAM_CMD_NOOP);
2239         if (!hdr) {
2240                 err = -EMSGSIZE;
2241                 goto err_msg_put;
2242         }
2243
2244         genlmsg_end(msg, hdr);
2245
2246         return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2247
2248 err_msg_put:
2249         nlmsg_free(msg);
2250
2251         return err;
2252 }
2253
2254 /*
2255  * Netlink cmd functions should be locked by following two functions.
2256  * Since dev gets held here, that ensures dev won't disappear in between.
2257  */
2258 static struct team *team_nl_team_get(struct genl_info *info)
2259 {
2260         struct net *net = genl_info_net(info);
2261         int ifindex;
2262         struct net_device *dev;
2263         struct team *team;
2264
2265         if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2266                 return NULL;
2267
2268         ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2269         dev = dev_get_by_index(net, ifindex);
2270         if (!dev || dev->netdev_ops != &team_netdev_ops) {
2271                 if (dev)
2272                         dev_put(dev);
2273                 return NULL;
2274         }
2275
2276         team = netdev_priv(dev);
2277         mutex_lock(&team->lock);
2278         return team;
2279 }
2280
2281 static void team_nl_team_put(struct team *team)
2282 {
2283         mutex_unlock(&team->lock);
2284         dev_put(team->dev);
2285 }
2286
2287 typedef int team_nl_send_func_t(struct sk_buff *skb,
2288                                 struct team *team, u32 portid);
2289
2290 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2291 {
2292         return genlmsg_unicast(dev_net(team->dev), skb, portid);
2293 }
2294
2295 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2296                                        struct team_option_inst *opt_inst)
2297 {
2298         struct nlattr *option_item;
2299         struct team_option *option = opt_inst->option;
2300         struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2301         struct team_gsetter_ctx ctx;
2302         int err;
2303
2304         ctx.info = opt_inst_info;
2305         err = team_option_get(team, opt_inst, &ctx);
2306         if (err)
2307                 return err;
2308
2309         option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
2310         if (!option_item)
2311                 return -EMSGSIZE;
2312
2313         if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2314                 goto nest_cancel;
2315         if (opt_inst_info->port &&
2316             nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2317                         opt_inst_info->port->dev->ifindex))
2318                 goto nest_cancel;
2319         if (opt_inst->option->array_size &&
2320             nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2321                         opt_inst_info->array_index))
2322                 goto nest_cancel;
2323
2324         switch (option->type) {
2325         case TEAM_OPTION_TYPE_U32:
2326                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2327                         goto nest_cancel;
2328                 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2329                         goto nest_cancel;
2330                 break;
2331         case TEAM_OPTION_TYPE_STRING:
2332                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2333                         goto nest_cancel;
2334                 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2335                                    ctx.data.str_val))
2336                         goto nest_cancel;
2337                 break;
2338         case TEAM_OPTION_TYPE_BINARY:
2339                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2340                         goto nest_cancel;
2341                 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2342                             ctx.data.bin_val.ptr))
2343                         goto nest_cancel;
2344                 break;
2345         case TEAM_OPTION_TYPE_BOOL:
2346                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2347                         goto nest_cancel;
2348                 if (ctx.data.bool_val &&
2349                     nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2350                         goto nest_cancel;
2351                 break;
2352         case TEAM_OPTION_TYPE_S32:
2353                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2354                         goto nest_cancel;
2355                 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2356                         goto nest_cancel;
2357                 break;
2358         default:
2359                 BUG();
2360         }
2361         if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2362                 goto nest_cancel;
2363         if (opt_inst->changed) {
2364                 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2365                         goto nest_cancel;
2366                 opt_inst->changed = false;
2367         }
2368         nla_nest_end(skb, option_item);
2369         return 0;
2370
2371 nest_cancel:
2372         nla_nest_cancel(skb, option_item);
2373         return -EMSGSIZE;
2374 }
2375
2376 static int __send_and_alloc_skb(struct sk_buff **pskb,
2377                                 struct team *team, u32 portid,
2378                                 team_nl_send_func_t *send_func)
2379 {
2380         int err;
2381
2382         if (*pskb) {
2383                 err = send_func(*pskb, team, portid);
2384                 if (err)
2385                         return err;
2386         }
2387         *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2388         if (!*pskb)
2389                 return -ENOMEM;
2390         return 0;
2391 }
2392
2393 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2394                                     int flags, team_nl_send_func_t *send_func,
2395                                     struct list_head *sel_opt_inst_list)
2396 {
2397         struct nlattr *option_list;
2398         struct nlmsghdr *nlh;
2399         void *hdr;
2400         struct team_option_inst *opt_inst;
2401         int err;
2402         struct sk_buff *skb = NULL;
2403         bool incomplete;
2404         int i;
2405
2406         opt_inst = list_first_entry(sel_opt_inst_list,
2407                                     struct team_option_inst, tmp_list);
2408
2409 start_again:
2410         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2411         if (err)
2412                 return err;
2413
2414         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2415                           TEAM_CMD_OPTIONS_GET);
2416         if (!hdr) {
2417                 nlmsg_free(skb);
2418                 return -EMSGSIZE;
2419         }
2420
2421         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2422                 goto nla_put_failure;
2423         option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2424         if (!option_list)
2425                 goto nla_put_failure;
2426
2427         i = 0;
2428         incomplete = false;
2429         list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2430                 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2431                 if (err) {
2432                         if (err == -EMSGSIZE) {
2433                                 if (!i)
2434                                         goto errout;
2435                                 incomplete = true;
2436                                 break;
2437                         }
2438                         goto errout;
2439                 }
2440                 i++;
2441         }
2442
2443         nla_nest_end(skb, option_list);
2444         genlmsg_end(skb, hdr);
2445         if (incomplete)
2446                 goto start_again;
2447
2448 send_done:
2449         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2450         if (!nlh) {
2451                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2452                 if (err)
2453                         return err;
2454                 goto send_done;
2455         }
2456
2457         return send_func(skb, team, portid);
2458
2459 nla_put_failure:
2460         err = -EMSGSIZE;
2461 errout:
2462         nlmsg_free(skb);
2463         return err;
2464 }
2465
2466 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2467 {
2468         struct team *team;
2469         struct team_option_inst *opt_inst;
2470         int err;
2471         LIST_HEAD(sel_opt_inst_list);
2472
2473         team = team_nl_team_get(info);
2474         if (!team)
2475                 return -EINVAL;
2476
2477         list_for_each_entry(opt_inst, &team->option_inst_list, list)
2478                 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2479         err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2480                                        NLM_F_ACK, team_nl_send_unicast,
2481                                        &sel_opt_inst_list);
2482
2483         team_nl_team_put(team);
2484
2485         return err;
2486 }
2487
2488 static int team_nl_send_event_options_get(struct team *team,
2489                                           struct list_head *sel_opt_inst_list);
2490
2491 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2492 {
2493         struct team *team;
2494         int err = 0;
2495         int i;
2496         struct nlattr *nl_option;
2497
2498         rtnl_lock();
2499
2500         team = team_nl_team_get(info);
2501         if (!team) {
2502                 err = -EINVAL;
2503                 goto rtnl_unlock;
2504         }
2505
2506         err = -EINVAL;
2507         if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2508                 err = -EINVAL;
2509                 goto team_put;
2510         }
2511
2512         nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2513                 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2514                 struct nlattr *attr;
2515                 struct nlattr *attr_data;
2516                 LIST_HEAD(opt_inst_list);
2517                 enum team_option_type opt_type;
2518                 int opt_port_ifindex = 0; /* != 0 for per-port options */
2519                 u32 opt_array_index = 0;
2520                 bool opt_is_array = false;
2521                 struct team_option_inst *opt_inst;
2522                 char *opt_name;
2523                 bool opt_found = false;
2524
2525                 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2526                         err = -EINVAL;
2527                         goto team_put;
2528                 }
2529                 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2530                                        nl_option, team_nl_option_policy,
2531                                        info->extack);
2532                 if (err)
2533                         goto team_put;
2534                 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2535                     !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2536                         err = -EINVAL;
2537                         goto team_put;
2538                 }
2539                 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2540                 case NLA_U32:
2541                         opt_type = TEAM_OPTION_TYPE_U32;
2542                         break;
2543                 case NLA_STRING:
2544                         opt_type = TEAM_OPTION_TYPE_STRING;
2545                         break;
2546                 case NLA_BINARY:
2547                         opt_type = TEAM_OPTION_TYPE_BINARY;
2548                         break;
2549                 case NLA_FLAG:
2550                         opt_type = TEAM_OPTION_TYPE_BOOL;
2551                         break;
2552                 case NLA_S32:
2553                         opt_type = TEAM_OPTION_TYPE_S32;
2554                         break;
2555                 default:
2556                         goto team_put;
2557                 }
2558
2559                 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2560                 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2561                         err = -EINVAL;
2562                         goto team_put;
2563                 }
2564
2565                 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2566                 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2567                 if (attr)
2568                         opt_port_ifindex = nla_get_u32(attr);
2569
2570                 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2571                 if (attr) {
2572                         opt_is_array = true;
2573                         opt_array_index = nla_get_u32(attr);
2574                 }
2575
2576                 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2577                         struct team_option *option = opt_inst->option;
2578                         struct team_gsetter_ctx ctx;
2579                         struct team_option_inst_info *opt_inst_info;
2580                         int tmp_ifindex;
2581
2582                         opt_inst_info = &opt_inst->info;
2583                         tmp_ifindex = opt_inst_info->port ?
2584                                       opt_inst_info->port->dev->ifindex : 0;
2585                         if (option->type != opt_type ||
2586                             strcmp(option->name, opt_name) ||
2587                             tmp_ifindex != opt_port_ifindex ||
2588                             (option->array_size && !opt_is_array) ||
2589                             opt_inst_info->array_index != opt_array_index)
2590                                 continue;
2591                         opt_found = true;
2592                         ctx.info = opt_inst_info;
2593                         switch (opt_type) {
2594                         case TEAM_OPTION_TYPE_U32:
2595                                 ctx.data.u32_val = nla_get_u32(attr_data);
2596                                 break;
2597                         case TEAM_OPTION_TYPE_STRING:
2598                                 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2599                                         err = -EINVAL;
2600                                         goto team_put;
2601                                 }
2602                                 ctx.data.str_val = nla_data(attr_data);
2603                                 break;
2604                         case TEAM_OPTION_TYPE_BINARY:
2605                                 ctx.data.bin_val.len = nla_len(attr_data);
2606                                 ctx.data.bin_val.ptr = nla_data(attr_data);
2607                                 break;
2608                         case TEAM_OPTION_TYPE_BOOL:
2609                                 ctx.data.bool_val = attr_data ? true : false;
2610                                 break;
2611                         case TEAM_OPTION_TYPE_S32:
2612                                 ctx.data.s32_val = nla_get_s32(attr_data);
2613                                 break;
2614                         default:
2615                                 BUG();
2616                         }
2617                         err = team_option_set(team, opt_inst, &ctx);
2618                         if (err)
2619                                 goto team_put;
2620                         opt_inst->changed = true;
2621                         list_add(&opt_inst->tmp_list, &opt_inst_list);
2622                 }
2623                 if (!opt_found) {
2624                         err = -ENOENT;
2625                         goto team_put;
2626                 }
2627
2628                 err = team_nl_send_event_options_get(team, &opt_inst_list);
2629                 if (err)
2630                         break;
2631         }
2632
2633 team_put:
2634         team_nl_team_put(team);
2635 rtnl_unlock:
2636         rtnl_unlock();
2637         return err;
2638 }
2639
2640 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2641                                      struct team_port *port)
2642 {
2643         struct nlattr *port_item;
2644
2645         port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2646         if (!port_item)
2647                 goto nest_cancel;
2648         if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2649                 goto nest_cancel;
2650         if (port->changed) {
2651                 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2652                         goto nest_cancel;
2653                 port->changed = false;
2654         }
2655         if ((port->removed &&
2656              nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2657             (port->state.linkup &&
2658              nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2659             nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2660             nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2661                 goto nest_cancel;
2662         nla_nest_end(skb, port_item);
2663         return 0;
2664
2665 nest_cancel:
2666         nla_nest_cancel(skb, port_item);
2667         return -EMSGSIZE;
2668 }
2669
2670 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2671                                       int flags, team_nl_send_func_t *send_func,
2672                                       struct team_port *one_port)
2673 {
2674         struct nlattr *port_list;
2675         struct nlmsghdr *nlh;
2676         void *hdr;
2677         struct team_port *port;
2678         int err;
2679         struct sk_buff *skb = NULL;
2680         bool incomplete;
2681         int i;
2682
2683         port = list_first_entry_or_null(&team->port_list,
2684                                         struct team_port, list);
2685
2686 start_again:
2687         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2688         if (err)
2689                 return err;
2690
2691         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2692                           TEAM_CMD_PORT_LIST_GET);
2693         if (!hdr) {
2694                 nlmsg_free(skb);
2695                 return -EMSGSIZE;
2696         }
2697
2698         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2699                 goto nla_put_failure;
2700         port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2701         if (!port_list)
2702                 goto nla_put_failure;
2703
2704         i = 0;
2705         incomplete = false;
2706
2707         /* If one port is selected, called wants to send port list containing
2708          * only this port. Otherwise go through all listed ports and send all
2709          */
2710         if (one_port) {
2711                 err = team_nl_fill_one_port_get(skb, one_port);
2712                 if (err)
2713                         goto errout;
2714         } else if (port) {
2715                 list_for_each_entry_from(port, &team->port_list, list) {
2716                         err = team_nl_fill_one_port_get(skb, port);
2717                         if (err) {
2718                                 if (err == -EMSGSIZE) {
2719                                         if (!i)
2720                                                 goto errout;
2721                                         incomplete = true;
2722                                         break;
2723                                 }
2724                                 goto errout;
2725                         }
2726                         i++;
2727                 }
2728         }
2729
2730         nla_nest_end(skb, port_list);
2731         genlmsg_end(skb, hdr);
2732         if (incomplete)
2733                 goto start_again;
2734
2735 send_done:
2736         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2737         if (!nlh) {
2738                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2739                 if (err)
2740                         return err;
2741                 goto send_done;
2742         }
2743
2744         return send_func(skb, team, portid);
2745
2746 nla_put_failure:
2747         err = -EMSGSIZE;
2748 errout:
2749         nlmsg_free(skb);
2750         return err;
2751 }
2752
2753 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2754                                      struct genl_info *info)
2755 {
2756         struct team *team;
2757         int err;
2758
2759         team = team_nl_team_get(info);
2760         if (!team)
2761                 return -EINVAL;
2762
2763         err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2764                                          NLM_F_ACK, team_nl_send_unicast, NULL);
2765
2766         team_nl_team_put(team);
2767
2768         return err;
2769 }
2770
2771 static const struct genl_ops team_nl_ops[] = {
2772         {
2773                 .cmd = TEAM_CMD_NOOP,
2774                 .doit = team_nl_cmd_noop,
2775                 .policy = team_nl_policy,
2776         },
2777         {
2778                 .cmd = TEAM_CMD_OPTIONS_SET,
2779                 .doit = team_nl_cmd_options_set,
2780                 .policy = team_nl_policy,
2781                 .flags = GENL_ADMIN_PERM,
2782         },
2783         {
2784                 .cmd = TEAM_CMD_OPTIONS_GET,
2785                 .doit = team_nl_cmd_options_get,
2786                 .policy = team_nl_policy,
2787                 .flags = GENL_ADMIN_PERM,
2788         },
2789         {
2790                 .cmd = TEAM_CMD_PORT_LIST_GET,
2791                 .doit = team_nl_cmd_port_list_get,
2792                 .policy = team_nl_policy,
2793                 .flags = GENL_ADMIN_PERM,
2794         },
2795 };
2796
2797 static const struct genl_multicast_group team_nl_mcgrps[] = {
2798         { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2799 };
2800
2801 static struct genl_family team_nl_family __ro_after_init = {
2802         .name           = TEAM_GENL_NAME,
2803         .version        = TEAM_GENL_VERSION,
2804         .maxattr        = TEAM_ATTR_MAX,
2805         .netnsok        = true,
2806         .module         = THIS_MODULE,
2807         .ops            = team_nl_ops,
2808         .n_ops          = ARRAY_SIZE(team_nl_ops),
2809         .mcgrps         = team_nl_mcgrps,
2810         .n_mcgrps       = ARRAY_SIZE(team_nl_mcgrps),
2811 };
2812
2813 static int team_nl_send_multicast(struct sk_buff *skb,
2814                                   struct team *team, u32 portid)
2815 {
2816         return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2817                                        skb, 0, 0, GFP_KERNEL);
2818 }
2819
2820 static int team_nl_send_event_options_get(struct team *team,
2821                                           struct list_head *sel_opt_inst_list)
2822 {
2823         return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2824                                         sel_opt_inst_list);
2825 }
2826
2827 static int team_nl_send_event_port_get(struct team *team,
2828                                        struct team_port *port)
2829 {
2830         return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2831                                           port);
2832 }
2833
2834 static int __init team_nl_init(void)
2835 {
2836         return genl_register_family(&team_nl_family);
2837 }
2838
2839 static void team_nl_fini(void)
2840 {
2841         genl_unregister_family(&team_nl_family);
2842 }
2843
2844
2845 /******************
2846  * Change checkers
2847  ******************/
2848
2849 static void __team_options_change_check(struct team *team)
2850 {
2851         int err;
2852         struct team_option_inst *opt_inst;
2853         LIST_HEAD(sel_opt_inst_list);
2854
2855         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2856                 if (opt_inst->changed)
2857                         list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2858         }
2859         err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2860         if (err && err != -ESRCH)
2861                 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2862                             err);
2863 }
2864
2865 /* rtnl lock is held */
2866
2867 static void __team_port_change_send(struct team_port *port, bool linkup)
2868 {
2869         int err;
2870
2871         port->changed = true;
2872         port->state.linkup = linkup;
2873         team_refresh_port_linkup(port);
2874         if (linkup) {
2875                 struct ethtool_link_ksettings ecmd;
2876
2877                 err = __ethtool_get_link_ksettings(port->dev, &ecmd);
2878                 if (!err) {
2879                         port->state.speed = ecmd.base.speed;
2880                         port->state.duplex = ecmd.base.duplex;
2881                         goto send_event;
2882                 }
2883         }
2884         port->state.speed = 0;
2885         port->state.duplex = 0;
2886
2887 send_event:
2888         err = team_nl_send_event_port_get(port->team, port);
2889         if (err && err != -ESRCH)
2890                 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2891                             port->dev->name, err);
2892
2893 }
2894
2895 static void __team_carrier_check(struct team *team)
2896 {
2897         struct team_port *port;
2898         bool team_linkup;
2899
2900         if (team->user_carrier_enabled)
2901                 return;
2902
2903         team_linkup = false;
2904         list_for_each_entry(port, &team->port_list, list) {
2905                 if (port->linkup) {
2906                         team_linkup = true;
2907                         break;
2908                 }
2909         }
2910
2911         if (team_linkup)
2912                 netif_carrier_on(team->dev);
2913         else
2914                 netif_carrier_off(team->dev);
2915 }
2916
2917 static void __team_port_change_check(struct team_port *port, bool linkup)
2918 {
2919         if (port->state.linkup != linkup)
2920                 __team_port_change_send(port, linkup);
2921         __team_carrier_check(port->team);
2922 }
2923
2924 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2925 {
2926         __team_port_change_send(port, linkup);
2927         __team_carrier_check(port->team);
2928 }
2929
2930 static void __team_port_change_port_removed(struct team_port *port)
2931 {
2932         port->removed = true;
2933         __team_port_change_send(port, false);
2934         __team_carrier_check(port->team);
2935 }
2936
2937 static void team_port_change_check(struct team_port *port, bool linkup)
2938 {
2939         struct team *team = port->team;
2940
2941         mutex_lock(&team->lock);
2942         __team_port_change_check(port, linkup);
2943         mutex_unlock(&team->lock);
2944 }
2945
2946
2947 /************************************
2948  * Net device notifier event handler
2949  ************************************/
2950
2951 static int team_device_event(struct notifier_block *unused,
2952                              unsigned long event, void *ptr)
2953 {
2954         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2955         struct team_port *port;
2956
2957         port = team_port_get_rtnl(dev);
2958         if (!port)
2959                 return NOTIFY_DONE;
2960
2961         switch (event) {
2962         case NETDEV_UP:
2963                 if (netif_oper_up(dev))
2964                         team_port_change_check(port, true);
2965                 break;
2966         case NETDEV_DOWN:
2967                 team_port_change_check(port, false);
2968                 break;
2969         case NETDEV_CHANGE:
2970                 if (netif_running(port->dev))
2971                         team_port_change_check(port,
2972                                                !!netif_oper_up(port->dev));
2973                 break;
2974         case NETDEV_UNREGISTER:
2975                 team_del_slave(port->team->dev, dev);
2976                 break;
2977         case NETDEV_FEAT_CHANGE:
2978                 team_compute_features(port->team);
2979                 break;
2980         case NETDEV_PRECHANGEMTU:
2981                 /* Forbid to change mtu of underlaying device */
2982                 if (!port->team->port_mtu_change_allowed)
2983                         return NOTIFY_BAD;
2984                 break;
2985         case NETDEV_PRE_TYPE_CHANGE:
2986                 /* Forbid to change type of underlaying device */
2987                 return NOTIFY_BAD;
2988         case NETDEV_RESEND_IGMP:
2989                 /* Propagate to master device */
2990                 call_netdevice_notifiers(event, port->team->dev);
2991                 break;
2992         }
2993         return NOTIFY_DONE;
2994 }
2995
2996 static struct notifier_block team_notifier_block __read_mostly = {
2997         .notifier_call = team_device_event,
2998 };
2999
3000
3001 /***********************
3002  * Module init and exit
3003  ***********************/
3004
3005 static int __init team_module_init(void)
3006 {
3007         int err;
3008
3009         register_netdevice_notifier(&team_notifier_block);
3010
3011         err = rtnl_link_register(&team_link_ops);
3012         if (err)
3013                 goto err_rtnl_reg;
3014
3015         err = team_nl_init();
3016         if (err)
3017                 goto err_nl_init;
3018
3019         return 0;
3020
3021 err_nl_init:
3022         rtnl_link_unregister(&team_link_ops);
3023
3024 err_rtnl_reg:
3025         unregister_netdevice_notifier(&team_notifier_block);
3026
3027         return err;
3028 }
3029
3030 static void __exit team_module_exit(void)
3031 {
3032         team_nl_fini();
3033         rtnl_link_unregister(&team_link_ops);
3034         unregister_netdevice_notifier(&team_notifier_block);
3035 }
3036
3037 module_init(team_module_init);
3038 module_exit(team_module_exit);
3039
3040 MODULE_LICENSE("GPL v2");
3041 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
3042 MODULE_DESCRIPTION("Ethernet team device driver");
3043 MODULE_ALIAS_RTNL_LINK(DRV_NAME);