drivers/net/team/team.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * drivers/net/team/team.c - Network team device driver
   4  * Copyright (c) 2011 Jiri Pirko <[email protected]>
   5  */
   6
   7 #include <linux/ethtool.h>
   8 #include <linux/kernel.h>
   9 #include <linux/types.h>
  10 #include <linux/module.h>
  11 #include <linux/init.h>
  12 #include <linux/slab.h>
  13 #include <linux/rcupdate.h>
  14 #include <linux/errno.h>
  15 #include <linux/ctype.h>
  16 #include <linux/notifier.h>
  17 #include <linux/netdevice.h>
  18 #include <linux/netpoll.h>
  19 #include <linux/if_vlan.h>
  20 #include <linux/if_arp.h>
  21 #include <linux/socket.h>
  22 #include <linux/etherdevice.h>
  23 #include <linux/rtnetlink.h>
  24 #include <net/rtnetlink.h>
  25 #include <net/genetlink.h>
  26 #include <net/netlink.h>
  27 #include <net/sch_generic.h>
  28 #include <generated/utsrelease.h>
  29 #include <linux/if_team.h>
  30
  31 #define DRV_NAME "team"
  32
  33
  34 /**********
  35  * Helpers
  36  **********/
  37
  38 static struct team_port *team_port_get_rtnl(const struct net_device *dev)
  39 {
  40         struct team_port *port = rtnl_dereference(dev->rx_handler_data);
  41
  42         return netif_is_team_port(dev) ? port : NULL;
  43 }
  44
  45 /*
  46  * Since the ability to change device address for open port device is tested in
  47  * team_port_add, this function can be called without control of return value
  48  */
  49 static int __set_port_dev_addr(struct net_device *port_dev,
  50                                const unsigned char *dev_addr)
  51 {
  52         struct sockaddr_storage addr;
  53
  54         memcpy(addr.__data, dev_addr, port_dev->addr_len);
  55         addr.ss_family = port_dev->type;
  56         return dev_set_mac_address(port_dev, (struct sockaddr *)&addr, NULL);
  57 }
  58
  59 static int team_port_set_orig_dev_addr(struct team_port *port)
  60 {
  61         return __set_port_dev_addr(port->dev, port->orig.dev_addr);
  62 }
  63
  64 static int team_port_set_team_dev_addr(struct team *team,
  65                                        struct team_port *port)
  66 {
  67         return __set_port_dev_addr(port->dev, team->dev->dev_addr);
  68 }
  69
  70 int team_modeop_port_enter(struct team *team, struct team_port *port)
  71 {
  72         return team_port_set_team_dev_addr(team, port);
  73 }
  74 EXPORT_SYMBOL(team_modeop_port_enter);
  75
  76 void team_modeop_port_change_dev_addr(struct team *team,
  77                                       struct team_port *port)
  78 {
  79         team_port_set_team_dev_addr(team, port);
  80 }
  81 EXPORT_SYMBOL(team_modeop_port_change_dev_addr);
  82
  83 static void team_lower_state_changed(struct team_port *port)
  84 {
  85         struct netdev_lag_lower_state_info info;
  86
  87         info.link_up = port->linkup;
  88         info.tx_enabled = team_port_enabled(port);
  89         netdev_lower_state_changed(port->dev, &info);
  90 }
  91
  92 static void team_refresh_port_linkup(struct team_port *port)
  93 {
  94         bool new_linkup = port->user.linkup_enabled ? port->user.linkup :
  95                                                       port->state.linkup;
  96
  97         if (port->linkup != new_linkup) {
  98                 port->linkup = new_linkup;
  99                 team_lower_state_changed(port);
 100         }
 101 }
 102
 103
 104 /*******************
 105  * Options handling
 106  *******************/
 107
 108 struct team_option_inst { /* One for each option instance */
 109         struct list_head list;
 110         struct list_head tmp_list;
 111         struct team_option *option;
 112         struct team_option_inst_info info;
 113         bool changed;
 114         bool removed;
 115 };
 116
 117 static struct team_option *__team_find_option(struct team *team,
 118                                               const char *opt_name)
 119 {
 120         struct team_option *option;
 121
 122         list_for_each_entry(option, &team->option_list, list) {
 123                 if (strcmp(option->name, opt_name) == 0)
 124                         return option;
 125         }
 126         return NULL;
 127 }
 128
 129 static void __team_option_inst_del(struct team_option_inst *opt_inst)
 130 {
 131         list_del(&opt_inst->list);
 132         kfree(opt_inst);
 133 }
 134
 135 static void __team_option_inst_del_option(struct team *team,
 136                                           struct team_option *option)
 137 {
 138         struct team_option_inst *opt_inst, *tmp;
 139
 140         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 141                 if (opt_inst->option == option)
 142                         __team_option_inst_del(opt_inst);
 143         }
 144 }
 145
 146 static int __team_option_inst_add(struct team *team, struct team_option *option,
 147                                   struct team_port *port)
 148 {
 149         struct team_option_inst *opt_inst;
 150         unsigned int array_size;
 151         unsigned int i;
 152         int err;
 153
 154         array_size = option->array_size;
 155         if (!array_size)
 156                 array_size = 1; /* No array but still need one instance */
 157
 158         for (i = 0; i < array_size; i++) {
 159                 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL);
 160                 if (!opt_inst)
 161                         return -ENOMEM;
 162                 opt_inst->option = option;
 163                 opt_inst->info.port = port;
 164                 opt_inst->info.array_index = i;
 165                 opt_inst->changed = true;
 166                 opt_inst->removed = false;
 167                 list_add_tail(&opt_inst->list, &team->option_inst_list);
 168                 if (option->init) {
 169                         err = option->init(team, &opt_inst->info);
 170                         if (err)
 171                                 return err;
 172                 }
 173
 174         }
 175         return 0;
 176 }
 177
 178 static int __team_option_inst_add_option(struct team *team,
 179                                          struct team_option *option)
 180 {
 181         int err;
 182
 183         if (!option->per_port) {
 184                 err = __team_option_inst_add(team, option, NULL);
 185                 if (err)
 186                         goto inst_del_option;
 187         }
 188         return 0;
 189
 190 inst_del_option:
 191         __team_option_inst_del_option(team, option);
 192         return err;
 193 }
 194
 195 static void __team_option_inst_mark_removed_option(struct team *team,
 196                                                    struct team_option *option)
 197 {
 198         struct team_option_inst *opt_inst;
 199
 200         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 201                 if (opt_inst->option == option) {
 202                         opt_inst->changed = true;
 203                         opt_inst->removed = true;
 204                 }
 205         }
 206 }
 207
 208 static void __team_option_inst_del_port(struct team *team,
 209                                         struct team_port *port)
 210 {
 211         struct team_option_inst *opt_inst, *tmp;
 212
 213         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 214                 if (opt_inst->option->per_port &&
 215                     opt_inst->info.port == port)
 216                         __team_option_inst_del(opt_inst);
 217         }
 218 }
 219
 220 static int __team_option_inst_add_port(struct team *team,
 221                                        struct team_port *port)
 222 {
 223         struct team_option *option;
 224         int err;
 225
 226         list_for_each_entry(option, &team->option_list, list) {
 227                 if (!option->per_port)
 228                         continue;
 229                 err = __team_option_inst_add(team, option, port);
 230                 if (err)
 231                         goto inst_del_port;
 232         }
 233         return 0;
 234
 235 inst_del_port:
 236         __team_option_inst_del_port(team, port);
 237         return err;
 238 }
 239
 240 static void __team_option_inst_mark_removed_port(struct team *team,
 241                                                  struct team_port *port)
 242 {
 243         struct team_option_inst *opt_inst;
 244
 245         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 246                 if (opt_inst->info.port == port) {
 247                         opt_inst->changed = true;
 248                         opt_inst->removed = true;
 249                 }
 250         }
 251 }
 252
 253 static int __team_options_register(struct team *team,
 254                                    const struct team_option *option,
 255                                    size_t option_count)
 256 {
 257         int i;
 258         struct team_option **dst_opts;
 259         int err;
 260
 261         dst_opts = kcalloc(option_count, sizeof(struct team_option *),
 262                            GFP_KERNEL);
 263         if (!dst_opts)
 264                 return -ENOMEM;
 265         for (i = 0; i < option_count; i++, option++) {
 266                 if (__team_find_option(team, option->name)) {
 267                         err = -EEXIST;
 268                         goto alloc_rollback;
 269                 }
 270                 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
 271                 if (!dst_opts[i]) {
 272                         err = -ENOMEM;
 273                         goto alloc_rollback;
 274                 }
 275         }
 276
 277         for (i = 0; i < option_count; i++) {
 278                 err = __team_option_inst_add_option(team, dst_opts[i]);
 279                 if (err)
 280                         goto inst_rollback;
 281                 list_add_tail(&dst_opts[i]->list, &team->option_list);
 282         }
 283
 284         kfree(dst_opts);
 285         return 0;
 286
 287 inst_rollback:
 288         for (i--; i >= 0; i--)
 289                 __team_option_inst_del_option(team, dst_opts[i]);
 290
 291         i = option_count;
 292 alloc_rollback:
 293         for (i--; i >= 0; i--)
 294                 kfree(dst_opts[i]);
 295
 296         kfree(dst_opts);
 297         return err;
 298 }
 299
 300 static void __team_options_mark_removed(struct team *team,
 301                                         const struct team_option *option,
 302                                         size_t option_count)
 303 {
 304         int i;
 305
 306         for (i = 0; i < option_count; i++, option++) {
 307                 struct team_option *del_opt;
 308
 309                 del_opt = __team_find_option(team, option->name);
 310                 if (del_opt)
 311                         __team_option_inst_mark_removed_option(team, del_opt);
 312         }
 313 }
 314
 315 static void __team_options_unregister(struct team *team,
 316                                       const struct team_option *option,
 317                                       size_t option_count)
 318 {
 319         int i;
 320
 321         for (i = 0; i < option_count; i++, option++) {
 322                 struct team_option *del_opt;
 323
 324                 del_opt = __team_find_option(team, option->name);
 325                 if (del_opt) {
 326                         __team_option_inst_del_option(team, del_opt);
 327                         list_del(&del_opt->list);
 328                         kfree(del_opt);
 329                 }
 330         }
 331 }
 332
 333 static void __team_options_change_check(struct team *team);
 334
 335 int team_options_register(struct team *team,
 336                           const struct team_option *option,
 337                           size_t option_count)
 338 {
 339         int err;
 340
 341         err = __team_options_register(team, option, option_count);
 342         if (err)
 343                 return err;
 344         __team_options_change_check(team);
 345         return 0;
 346 }
 347 EXPORT_SYMBOL(team_options_register);
 348
 349 void team_options_unregister(struct team *team,
 350                              const struct team_option *option,
 351                              size_t option_count)
 352 {
 353         __team_options_mark_removed(team, option, option_count);
 354         __team_options_change_check(team);
 355         __team_options_unregister(team, option, option_count);
 356 }
 357 EXPORT_SYMBOL(team_options_unregister);
 358
 359 static int team_option_get(struct team *team,
 360                            struct team_option_inst *opt_inst,
 361                            struct team_gsetter_ctx *ctx)
 362 {
 363         if (!opt_inst->option->getter)
 364                 return -EOPNOTSUPP;
 365         return opt_inst->option->getter(team, ctx);
 366 }
 367
 368 static int team_option_set(struct team *team,
 369                            struct team_option_inst *opt_inst,
 370                            struct team_gsetter_ctx *ctx)
 371 {
 372         if (!opt_inst->option->setter)
 373                 return -EOPNOTSUPP;
 374         return opt_inst->option->setter(team, ctx);
 375 }
 376
 377 void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info)
 378 {
 379         struct team_option_inst *opt_inst;
 380
 381         opt_inst = container_of(opt_inst_info, struct team_option_inst, info);
 382         opt_inst->changed = true;
 383 }
 384 EXPORT_SYMBOL(team_option_inst_set_change);
 385
 386 void team_options_change_check(struct team *team)
 387 {
 388         __team_options_change_check(team);
 389 }
 390 EXPORT_SYMBOL(team_options_change_check);
 391
 392
 393 /****************
 394  * Mode handling
 395  ****************/
 396
 397 static LIST_HEAD(mode_list);
 398 static DEFINE_SPINLOCK(mode_list_lock);
 399
 400 struct team_mode_item {
 401         struct list_head list;
 402         const struct team_mode *mode;
 403 };
 404
 405 static struct team_mode_item *__find_mode(const char *kind)
 406 {
 407         struct team_mode_item *mitem;
 408
 409         list_for_each_entry(mitem, &mode_list, list) {
 410                 if (strcmp(mitem->mode->kind, kind) == 0)
 411                         return mitem;
 412         }
 413         return NULL;
 414 }
 415
 416 static bool is_good_mode_name(const char *name)
 417 {
 418         while (*name != '\0') {
 419                 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
 420                         return false;
 421                 name++;
 422         }
 423         return true;
 424 }
 425
 426 int team_mode_register(const struct team_mode *mode)
 427 {
 428         int err = 0;
 429         struct team_mode_item *mitem;
 430
 431         if (!is_good_mode_name(mode->kind) ||
 432             mode->priv_size > TEAM_MODE_PRIV_SIZE)
 433                 return -EINVAL;
 434
 435         mitem = kmalloc(sizeof(*mitem), GFP_KERNEL);
 436         if (!mitem)
 437                 return -ENOMEM;
 438
 439         spin_lock(&mode_list_lock);
 440         if (__find_mode(mode->kind)) {
 441                 err = -EEXIST;
 442                 kfree(mitem);
 443                 goto unlock;
 444         }
 445         mitem->mode = mode;
 446         list_add_tail(&mitem->list, &mode_list);
 447 unlock:
 448         spin_unlock(&mode_list_lock);
 449         return err;
 450 }
 451 EXPORT_SYMBOL(team_mode_register);
 452
 453 void team_mode_unregister(const struct team_mode *mode)
 454 {
 455         struct team_mode_item *mitem;
 456
 457         spin_lock(&mode_list_lock);
 458         mitem = __find_mode(mode->kind);
 459         if (mitem) {
 460                 list_del_init(&mitem->list);
 461                 kfree(mitem);
 462         }
 463         spin_unlock(&mode_list_lock);
 464 }
 465 EXPORT_SYMBOL(team_mode_unregister);
 466
 467 static const struct team_mode *team_mode_get(const char *kind)
 468 {
 469         struct team_mode_item *mitem;
 470         const struct team_mode *mode = NULL;
 471
 472         if (!try_module_get(THIS_MODULE))
 473                 return NULL;
 474
 475         spin_lock(&mode_list_lock);
 476         mitem = __find_mode(kind);
 477         if (!mitem) {
 478                 spin_unlock(&mode_list_lock);
 479                 request_module("team-mode-%s", kind);
 480                 spin_lock(&mode_list_lock);
 481                 mitem = __find_mode(kind);
 482         }
 483         if (mitem) {
 484                 mode = mitem->mode;
 485                 if (!try_module_get(mode->owner))
 486                         mode = NULL;
 487         }
 488
 489         spin_unlock(&mode_list_lock);
 490         module_put(THIS_MODULE);
 491         return mode;
 492 }
 493
 494 static void team_mode_put(const struct team_mode *mode)
 495 {
 496         module_put(mode->owner);
 497 }
 498
 499 static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
 500 {
 501         dev_kfree_skb_any(skb);
 502         return false;
 503 }
 504
 505 static rx_handler_result_t team_dummy_receive(struct team *team,
 506                                               struct team_port *port,
 507                                               struct sk_buff *skb)
 508 {
 509         return RX_HANDLER_ANOTHER;
 510 }
 511
 512 static const struct team_mode __team_no_mode = {
 513         .kind           = "*NOMODE*",
 514 };
 515
 516 static bool team_is_mode_set(struct team *team)
 517 {
 518         return team->mode != &__team_no_mode;
 519 }
 520
 521 static void team_set_no_mode(struct team *team)
 522 {
 523         team->user_carrier_enabled = false;
 524         team->mode = &__team_no_mode;
 525 }
 526
 527 static void team_adjust_ops(struct team *team)
 528 {
 529         /*
 530          * To avoid checks in rx/tx skb paths, ensure here that non-null and
 531          * correct ops are always set.
 532          */
 533
 534         if (!team->en_port_count || !team_is_mode_set(team) ||
 535             !team->mode->ops->transmit)
 536                 team->ops.transmit = team_dummy_transmit;
 537         else
 538                 team->ops.transmit = team->mode->ops->transmit;
 539
 540         if (!team->en_port_count || !team_is_mode_set(team) ||
 541             !team->mode->ops->receive)
 542                 team->ops.receive = team_dummy_receive;
 543         else
 544                 team->ops.receive = team->mode->ops->receive;
 545 }
 546
 547 /*
 548  * We can benefit from the fact that it's ensured no port is present
 549  * at the time of mode change. Therefore no packets are in fly so there's no
 550  * need to set mode operations in any special way.
 551  */
 552 static int __team_change_mode(struct team *team,
 553                               const struct team_mode *new_mode)
 554 {
 555         /* Check if mode was previously set and do cleanup if so */
 556         if (team_is_mode_set(team)) {
 557                 void (*exit_op)(struct team *team) = team->ops.exit;
 558
 559                 /* Clear ops area so no callback is called any longer */
 560                 memset(&team->ops, 0, sizeof(struct team_mode_ops));
 561                 team_adjust_ops(team);
 562
 563                 if (exit_op)
 564                         exit_op(team);
 565                 team_mode_put(team->mode);
 566                 team_set_no_mode(team);
 567                 /* zero private data area */
 568                 memset(&team->mode_priv, 0,
 569                        sizeof(struct team) - offsetof(struct team, mode_priv));
 570         }
 571
 572         if (!new_mode)
 573                 return 0;
 574
 575         if (new_mode->ops->init) {
 576                 int err;
 577
 578                 err = new_mode->ops->init(team);
 579                 if (err)
 580                         return err;
 581         }
 582
 583         team->mode = new_mode;
 584         memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
 585         team_adjust_ops(team);
 586
 587         return 0;
 588 }
 589
 590 static int team_change_mode(struct team *team, const char *kind)
 591 {
 592         const struct team_mode *new_mode;
 593         struct net_device *dev = team->dev;
 594         int err;
 595
 596         if (!list_empty(&team->port_list)) {
 597                 netdev_err(dev, "No ports can be present during mode change\n");
 598                 return -EBUSY;
 599         }
 600
 601         if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) {
 602                 netdev_err(dev, "Unable to change to the same mode the team is in\n");
 603                 return -EINVAL;
 604         }
 605
 606         new_mode = team_mode_get(kind);
 607         if (!new_mode) {
 608                 netdev_err(dev, "Mode \"%s\" not found\n", kind);
 609                 return -EINVAL;
 610         }
 611
 612         err = __team_change_mode(team, new_mode);
 613         if (err) {
 614                 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
 615                 team_mode_put(new_mode);
 616                 return err;
 617         }
 618
 619         netdev_info(dev, "Mode changed to \"%s\"\n", kind);
 620         return 0;
 621 }
 622
 623
 624 /*********************
 625  * Peers notification
 626  *********************/
 627
 628 static void team_notify_peers_work(struct work_struct *work)
 629 {
 630         struct team *team;
 631         int val;
 632
 633         team = container_of(work, struct team, notify_peers.dw.work);
 634
 635         if (!rtnl_trylock()) {
 636                 schedule_delayed_work(&team->notify_peers.dw, 0);
 637                 return;
 638         }
 639         val = atomic_dec_if_positive(&team->notify_peers.count_pending);
 640         if (val < 0) {
 641                 rtnl_unlock();
 642                 return;
 643         }
 644         call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, team->dev);
 645         rtnl_unlock();
 646         if (val)
 647                 schedule_delayed_work(&team->notify_peers.dw,
 648                                       msecs_to_jiffies(team->notify_peers.interval));
 649 }
 650
 651 static void team_notify_peers(struct team *team)
 652 {
 653         if (!team->notify_peers.count || !netif_running(team->dev))
 654                 return;
 655         atomic_add(team->notify_peers.count, &team->notify_peers.count_pending);
 656         schedule_delayed_work(&team->notify_peers.dw, 0);
 657 }
 658
 659 static void team_notify_peers_init(struct team *team)
 660 {
 661         INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work);
 662 }
 663
 664 static void team_notify_peers_fini(struct team *team)
 665 {
 666         cancel_delayed_work_sync(&team->notify_peers.dw);
 667 }
 668
 669
 670 /*******************************
 671  * Send multicast group rejoins
 672  *******************************/
 673
 674 static void team_mcast_rejoin_work(struct work_struct *work)
 675 {
 676         struct team *team;
 677         int val;
 678
 679         team = container_of(work, struct team, mcast_rejoin.dw.work);
 680
 681         if (!rtnl_trylock()) {
 682                 schedule_delayed_work(&team->mcast_rejoin.dw, 0);
 683                 return;
 684         }
 685         val = atomic_dec_if_positive(&team->mcast_rejoin.count_pending);
 686         if (val < 0) {
 687                 rtnl_unlock();
 688                 return;
 689         }
 690         call_netdevice_notifiers(NETDEV_RESEND_IGMP, team->dev);
 691         rtnl_unlock();
 692         if (val)
 693                 schedule_delayed_work(&team->mcast_rejoin.dw,
 694                                       msecs_to_jiffies(team->mcast_rejoin.interval));
 695 }
 696
 697 static void team_mcast_rejoin(struct team *team)
 698 {
 699         if (!team->mcast_rejoin.count || !netif_running(team->dev))
 700                 return;
 701         atomic_add(team->mcast_rejoin.count, &team->mcast_rejoin.count_pending);
 702         schedule_delayed_work(&team->mcast_rejoin.dw, 0);
 703 }
 704
 705 static void team_mcast_rejoin_init(struct team *team)
 706 {
 707         INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work);
 708 }
 709
 710 static void team_mcast_rejoin_fini(struct team *team)
 711 {
 712         cancel_delayed_work_sync(&team->mcast_rejoin.dw);
 713 }
 714
 715
 716 /************************
 717  * Rx path frame handler
 718  ************************/
 719
 720 /* note: already called with rcu_read_lock */
 721 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
 722 {
 723         struct sk_buff *skb = *pskb;
 724         struct team_port *port;
 725         struct team *team;
 726         rx_handler_result_t res;
 727
 728         skb = skb_share_check(skb, GFP_ATOMIC);
 729         if (!skb)
 730                 return RX_HANDLER_CONSUMED;
 731
 732         *pskb = skb;
 733
 734         port = team_port_get_rcu(skb->dev);
 735         team = port->team;
 736         if (!team_port_enabled(port)) {
 737                 if (is_link_local_ether_addr(eth_hdr(skb)->h_dest))
 738                         /* link-local packets are mostly useful when stack receives them
 739                          * with the link they arrive on.
 740                          */
 741                         return RX_HANDLER_PASS;
 742                 /* allow exact match delivery for disabled ports */
 743                 res = RX_HANDLER_EXACT;
 744         } else {
 745                 res = team->ops.receive(team, port, skb);
 746         }
 747         if (res == RX_HANDLER_ANOTHER) {
 748                 struct team_pcpu_stats *pcpu_stats;
 749
 750                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
 751                 u64_stats_update_begin(&pcpu_stats->syncp);
 752                 u64_stats_inc(&pcpu_stats->rx_packets);
 753                 u64_stats_add(&pcpu_stats->rx_bytes, skb->len);
 754                 if (skb->pkt_type == PACKET_MULTICAST)
 755                         u64_stats_inc(&pcpu_stats->rx_multicast);
 756                 u64_stats_update_end(&pcpu_stats->syncp);
 757
 758                 skb->dev = team->dev;
 759         } else if (res == RX_HANDLER_EXACT) {
 760                 this_cpu_inc(team->pcpu_stats->rx_nohandler);
 761         } else {
 762                 this_cpu_inc(team->pcpu_stats->rx_dropped);
 763         }
 764
 765         return res;
 766 }
 767
 768
 769 /*************************************
 770  * Multiqueue Tx port select override
 771  *************************************/
 772
 773 static int team_queue_override_init(struct team *team)
 774 {
 775         struct list_head *listarr;
 776         unsigned int queue_cnt = team->dev->num_tx_queues - 1;
 777         unsigned int i;
 778
 779         if (!queue_cnt)
 780                 return 0;
 781         listarr = kmalloc_array(queue_cnt, sizeof(struct list_head),
 782                                 GFP_KERNEL);
 783         if (!listarr)
 784                 return -ENOMEM;
 785         team->qom_lists = listarr;
 786         for (i = 0; i < queue_cnt; i++)
 787                 INIT_LIST_HEAD(listarr++);
 788         return 0;
 789 }
 790
 791 static void team_queue_override_fini(struct team *team)
 792 {
 793         kfree(team->qom_lists);
 794 }
 795
 796 static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
 797 {
 798         return &team->qom_lists[queue_id - 1];
 799 }
 800
 801 /*
 802  * note: already called with rcu_read_lock
 803  */
 804 static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
 805 {
 806         struct list_head *qom_list;
 807         struct team_port *port;
 808
 809         if (!team->queue_override_enabled || !skb->queue_mapping)
 810                 return false;
 811         qom_list = __team_get_qom_list(team, skb->queue_mapping);
 812         list_for_each_entry_rcu(port, qom_list, qom_list) {
 813                 if (!team_dev_queue_xmit(team, port, skb))
 814                         return true;
 815         }
 816         return false;
 817 }
 818
 819 static void __team_queue_override_port_del(struct team *team,
 820                                            struct team_port *port)
 821 {
 822         if (!port->queue_id)
 823                 return;
 824         list_del_rcu(&port->qom_list);
 825 }
 826
 827 static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
 828                                                       struct team_port *cur)
 829 {
 830         if (port->priority < cur->priority)
 831                 return true;
 832         if (port->priority > cur->priority)
 833                 return false;
 834         if (port->index < cur->index)
 835                 return true;
 836         return false;
 837 }
 838
 839 static void __team_queue_override_port_add(struct team *team,
 840                                            struct team_port *port)
 841 {
 842         struct team_port *cur;
 843         struct list_head *qom_list;
 844         struct list_head *node;
 845
 846         if (!port->queue_id)
 847                 return;
 848         qom_list = __team_get_qom_list(team, port->queue_id);
 849         node = qom_list;
 850         list_for_each_entry(cur, qom_list, qom_list) {
 851                 if (team_queue_override_port_has_gt_prio_than(port, cur))
 852                         break;
 853                 node = &cur->qom_list;
 854         }
 855         list_add_tail_rcu(&port->qom_list, node);
 856 }
 857
 858 static void __team_queue_override_enabled_check(struct team *team)
 859 {
 860         struct team_port *port;
 861         bool enabled = false;
 862
 863         list_for_each_entry(port, &team->port_list, list) {
 864                 if (port->queue_id) {
 865                         enabled = true;
 866                         break;
 867                 }
 868         }
 869         if (enabled == team->queue_override_enabled)
 870                 return;
 871         netdev_dbg(team->dev, "%s queue override\n",
 872                    enabled ? "Enabling" : "Disabling");
 873         team->queue_override_enabled = enabled;
 874 }
 875
 876 static void team_queue_override_port_prio_changed(struct team *team,
 877                                                   struct team_port *port)
 878 {
 879         if (!port->queue_id || team_port_enabled(port))
 880                 return;
 881         __team_queue_override_port_del(team, port);
 882         __team_queue_override_port_add(team, port);
 883         __team_queue_override_enabled_check(team);
 884 }
 885
 886 static void team_queue_override_port_change_queue_id(struct team *team,
 887                                                      struct team_port *port,
 888                                                      u16 new_queue_id)
 889 {
 890         if (team_port_enabled(port)) {
 891                 __team_queue_override_port_del(team, port);
 892                 port->queue_id = new_queue_id;
 893                 __team_queue_override_port_add(team, port);
 894                 __team_queue_override_enabled_check(team);
 895         } else {
 896                 port->queue_id = new_queue_id;
 897         }
 898 }
 899
 900 static void team_queue_override_port_add(struct team *team,
 901                                          struct team_port *port)
 902 {
 903         __team_queue_override_port_add(team, port);
 904         __team_queue_override_enabled_check(team);
 905 }
 906
 907 static void team_queue_override_port_del(struct team *team,
 908                                          struct team_port *port)
 909 {
 910         __team_queue_override_port_del(team, port);
 911         __team_queue_override_enabled_check(team);
 912 }
 913
 914
 915 /****************
 916  * Port handling
 917  ****************/
 918
 919 static bool team_port_find(const struct team *team,
 920                            const struct team_port *port)
 921 {
 922         struct team_port *cur;
 923
 924         list_for_each_entry(cur, &team->port_list, list)
 925                 if (cur == port)
 926                         return true;
 927         return false;
 928 }
 929
 930 /*
 931  * Enable/disable port by adding to enabled port hashlist and setting
 932  * port->index (Might be racy so reader could see incorrect ifindex when
 933  * processing a flying packet, but that is not a problem). Write guarded
 934  * by team->lock.
 935  */
 936 static void team_port_enable(struct team *team,
 937                              struct team_port *port)
 938 {
 939         if (team_port_enabled(port))
 940                 return;
 941         port->index = team->en_port_count++;
 942         hlist_add_head_rcu(&port->hlist,
 943                            team_port_index_hash(team, port->index));
 944         team_adjust_ops(team);
 945         team_queue_override_port_add(team, port);
 946         if (team->ops.port_enabled)
 947                 team->ops.port_enabled(team, port);
 948         team_notify_peers(team);
 949         team_mcast_rejoin(team);
 950         team_lower_state_changed(port);
 951 }
 952
 953 static void __reconstruct_port_hlist(struct team *team, int rm_index)
 954 {
 955         int i;
 956         struct team_port *port;
 957
 958         for (i = rm_index + 1; i < team->en_port_count; i++) {
 959                 port = team_get_port_by_index(team, i);
 960                 hlist_del_rcu(&port->hlist);
 961                 port->index--;
 962                 hlist_add_head_rcu(&port->hlist,
 963                                    team_port_index_hash(team, port->index));
 964         }
 965 }
 966
 967 static void team_port_disable(struct team *team,
 968                               struct team_port *port)
 969 {
 970         if (!team_port_enabled(port))
 971                 return;
 972         if (team->ops.port_disabled)
 973                 team->ops.port_disabled(team, port);
 974         hlist_del_rcu(&port->hlist);
 975         __reconstruct_port_hlist(team, port->index);
 976         port->index = -1;
 977         team->en_port_count--;
 978         team_queue_override_port_del(team, port);
 979         team_adjust_ops(team);
 980         team_lower_state_changed(port);
 981 }
 982
 983 #define TEAM_VLAN_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
 984                             NETIF_F_FRAGLIST | NETIF_F_GSO_SOFTWARE | \
 985                             NETIF_F_HIGHDMA | NETIF_F_LRO)
 986
 987 #define TEAM_ENC_FEATURES       (NETIF_F_HW_CSUM | NETIF_F_SG | \
 988                                  NETIF_F_RXCSUM | NETIF_F_GSO_SOFTWARE)
 989
 990 static void __team_compute_features(struct team *team)
 991 {
 992         struct team_port *port;
 993         netdev_features_t vlan_features = TEAM_VLAN_FEATURES &
 994                                           NETIF_F_ALL_FOR_ALL;
 995         netdev_features_t enc_features  = TEAM_ENC_FEATURES;
 996         unsigned short max_hard_header_len = ETH_HLEN;
 997         unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE |
 998                                         IFF_XMIT_DST_RELEASE_PERM;
 999
1000         rcu_read_lock();
1001         list_for_each_entry_rcu(port, &team->port_list, list) {
1002                 vlan_features = netdev_increment_features(vlan_features,
1003                                         port->dev->vlan_features,
1004                                         TEAM_VLAN_FEATURES);
1005                 enc_features =
1006                         netdev_increment_features(enc_features,
1007                                                   port->dev->hw_enc_features,
1008                                                   TEAM_ENC_FEATURES);
1009
1010
1011                 dst_release_flag &= port->dev->priv_flags;
1012                 if (port->dev->hard_header_len > max_hard_header_len)
1013                         max_hard_header_len = port->dev->hard_header_len;
1014         }
1015         rcu_read_unlock();
1016
1017         team->dev->vlan_features = vlan_features;
1018         team->dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL |
1019                                      NETIF_F_HW_VLAN_CTAG_TX |
1020                                      NETIF_F_HW_VLAN_STAG_TX;
1021         team->dev->hard_header_len = max_hard_header_len;
1022
1023         team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
1024         if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
1025                 team->dev->priv_flags |= IFF_XMIT_DST_RELEASE;
1026 }
1027
1028 static void team_compute_features(struct team *team)
1029 {
1030         __team_compute_features(team);
1031         netdev_change_features(team->dev);
1032 }
1033
1034 static int team_port_enter(struct team *team, struct team_port *port)
1035 {
1036         int err = 0;
1037
1038         dev_hold(team->dev);
1039         if (team->ops.port_enter) {
1040                 err = team->ops.port_enter(team, port);
1041                 if (err) {
1042                         netdev_err(team->dev, "Device %s failed to enter team mode\n",
1043                                    port->dev->name);
1044                         goto err_port_enter;
1045                 }
1046         }
1047
1048         return 0;
1049
1050 err_port_enter:
1051         dev_put(team->dev);
1052
1053         return err;
1054 }
1055
1056 static void team_port_leave(struct team *team, struct team_port *port)
1057 {
1058         if (team->ops.port_leave)
1059                 team->ops.port_leave(team, port);
1060         dev_put(team->dev);
1061 }
1062
1063 #ifdef CONFIG_NET_POLL_CONTROLLER
1064 static int __team_port_enable_netpoll(struct team_port *port)
1065 {
1066         struct netpoll *np;
1067         int err;
1068
1069         np = kzalloc(sizeof(*np), GFP_KERNEL);
1070         if (!np)
1071                 return -ENOMEM;
1072
1073         err = __netpoll_setup(np, port->dev);
1074         if (err) {
1075                 kfree(np);
1076                 return err;
1077         }
1078         port->np = np;
1079         return err;
1080 }
1081
1082 static int team_port_enable_netpoll(struct team_port *port)
1083 {
1084         if (!port->team->dev->npinfo)
1085                 return 0;
1086
1087         return __team_port_enable_netpoll(port);
1088 }
1089
1090 static void team_port_disable_netpoll(struct team_port *port)
1091 {
1092         struct netpoll *np = port->np;
1093
1094         if (!np)
1095                 return;
1096         port->np = NULL;
1097
1098         __netpoll_free(np);
1099 }
1100 #else
1101 static int team_port_enable_netpoll(struct team_port *port)
1102 {
1103         return 0;
1104 }
1105 static void team_port_disable_netpoll(struct team_port *port)
1106 {
1107 }
1108 #endif
1109
1110 static int team_upper_dev_link(struct team *team, struct team_port *port,
1111                                struct netlink_ext_ack *extack)
1112 {
1113         struct netdev_lag_upper_info lag_upper_info;
1114         int err;
1115
1116         lag_upper_info.tx_type = team->mode->lag_tx_type;
1117         lag_upper_info.hash_type = NETDEV_LAG_HASH_UNKNOWN;
1118         err = netdev_master_upper_dev_link(port->dev, team->dev, NULL,
1119                                            &lag_upper_info, extack);
1120         if (err)
1121                 return err;
1122         port->dev->priv_flags |= IFF_TEAM_PORT;
1123         return 0;
1124 }
1125
1126 static void team_upper_dev_unlink(struct team *team, struct team_port *port)
1127 {
1128         netdev_upper_dev_unlink(port->dev, team->dev);
1129         port->dev->priv_flags &= ~IFF_TEAM_PORT;
1130 }
1131
1132 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1133 static int team_dev_type_check_change(struct net_device *dev,
1134                                       struct net_device *port_dev);
1135
1136 static int team_port_add(struct team *team, struct net_device *port_dev,
1137                          struct netlink_ext_ack *extack)
1138 {
1139         struct net_device *dev = team->dev;
1140         struct team_port *port;
1141         char *portname = port_dev->name;
1142         int err;
1143
1144         if (port_dev->flags & IFF_LOOPBACK) {
1145                 NL_SET_ERR_MSG(extack, "Loopback device can't be added as a team port");
1146                 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1147                            portname);
1148                 return -EINVAL;
1149         }
1150
1151         if (netif_is_team_port(port_dev)) {
1152                 NL_SET_ERR_MSG(extack, "Device is already a port of a team device");
1153                 netdev_err(dev, "Device %s is already a port "
1154                                 "of a team device\n", portname);
1155                 return -EBUSY;
1156         }
1157
1158         if (dev == port_dev) {
1159                 NL_SET_ERR_MSG(extack, "Cannot enslave team device to itself");
1160                 netdev_err(dev, "Cannot enslave team device to itself\n");
1161                 return -EINVAL;
1162         }
1163
1164         if (netdev_has_upper_dev(dev, port_dev)) {
1165                 NL_SET_ERR_MSG(extack, "Device is already an upper device of the team interface");
1166                 netdev_err(dev, "Device %s is already an upper device of the team interface\n",
1167                            portname);
1168                 return -EBUSY;
1169         }
1170
1171         if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1172             vlan_uses_dev(dev)) {
1173                 NL_SET_ERR_MSG(extack, "Device is VLAN challenged and team device has VLAN set up");
1174                 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1175                            portname);
1176                 return -EPERM;
1177         }
1178
1179         err = team_dev_type_check_change(dev, port_dev);
1180         if (err)
1181                 return err;
1182
1183         if (port_dev->flags & IFF_UP) {
1184                 NL_SET_ERR_MSG(extack, "Device is up. Set it down before adding it as a team port");
1185                 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1186                            portname);
1187                 return -EBUSY;
1188         }
1189
1190         port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1191                        GFP_KERNEL);
1192         if (!port)
1193                 return -ENOMEM;
1194
1195         port->dev = port_dev;
1196         port->team = team;
1197         INIT_LIST_HEAD(&port->qom_list);
1198
1199         port->orig.mtu = port_dev->mtu;
1200         err = dev_set_mtu(port_dev, dev->mtu);
1201         if (err) {
1202                 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1203                 goto err_set_mtu;
1204         }
1205
1206         memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1207
1208         err = team_port_enter(team, port);
1209         if (err) {
1210                 netdev_err(dev, "Device %s failed to enter team mode\n",
1211                            portname);
1212                 goto err_port_enter;
1213         }
1214
1215         err = dev_open(port_dev, extack);
1216         if (err) {
1217                 netdev_dbg(dev, "Device %s opening failed\n",
1218                            portname);
1219                 goto err_dev_open;
1220         }
1221
1222         err = vlan_vids_add_by_dev(port_dev, dev);
1223         if (err) {
1224                 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1225                                 portname);
1226                 goto err_vids_add;
1227         }
1228
1229         err = team_port_enable_netpoll(port);
1230         if (err) {
1231                 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1232                            portname);
1233                 goto err_enable_netpoll;
1234         }
1235
1236         if (!(dev->features & NETIF_F_LRO))
1237                 dev_disable_lro(port_dev);
1238
1239         err = netdev_rx_handler_register(port_dev, team_handle_frame,
1240                                          port);
1241         if (err) {
1242                 netdev_err(dev, "Device %s failed to register rx_handler\n",
1243                            portname);
1244                 goto err_handler_register;
1245         }
1246
1247         err = team_upper_dev_link(team, port, extack);
1248         if (err) {
1249                 netdev_err(dev, "Device %s failed to set upper link\n",
1250                            portname);
1251                 goto err_set_upper_link;
1252         }
1253
1254         err = __team_option_inst_add_port(team, port);
1255         if (err) {
1256                 netdev_err(dev, "Device %s failed to add per-port options\n",
1257                            portname);
1258                 goto err_option_port_add;
1259         }
1260
1261         /* set promiscuity level to new slave */
1262         if (dev->flags & IFF_PROMISC) {
1263                 err = dev_set_promiscuity(port_dev, 1);
1264                 if (err)
1265                         goto err_set_slave_promisc;
1266         }
1267
1268         /* set allmulti level to new slave */
1269         if (dev->flags & IFF_ALLMULTI) {
1270                 err = dev_set_allmulti(port_dev, 1);
1271                 if (err) {
1272                         if (dev->flags & IFF_PROMISC)
1273                                 dev_set_promiscuity(port_dev, -1);
1274                         goto err_set_slave_promisc;
1275                 }
1276         }
1277
1278         if (dev->flags & IFF_UP) {
1279                 netif_addr_lock_bh(dev);
1280                 dev_uc_sync_multiple(port_dev, dev);
1281                 dev_mc_sync_multiple(port_dev, dev);
1282                 netif_addr_unlock_bh(dev);
1283         }
1284
1285         port->index = -1;
1286         list_add_tail_rcu(&port->list, &team->port_list);
1287         team_port_enable(team, port);
1288         __team_compute_features(team);
1289         __team_port_change_port_added(port, !!netif_oper_up(port_dev));
1290         __team_options_change_check(team);
1291
1292         netdev_info(dev, "Port device %s added\n", portname);
1293
1294         return 0;
1295
1296 err_set_slave_promisc:
1297         __team_option_inst_del_port(team, port);
1298
1299 err_option_port_add:
1300         team_upper_dev_unlink(team, port);
1301
1302 err_set_upper_link:
1303         netdev_rx_handler_unregister(port_dev);
1304
1305 err_handler_register:
1306         team_port_disable_netpoll(port);
1307
1308 err_enable_netpoll:
1309         vlan_vids_del_by_dev(port_dev, dev);
1310
1311 err_vids_add:
1312         dev_close(port_dev);
1313
1314 err_dev_open:
1315         team_port_leave(team, port);
1316         team_port_set_orig_dev_addr(port);
1317
1318 err_port_enter:
1319         dev_set_mtu(port_dev, port->orig.mtu);
1320
1321 err_set_mtu:
1322         kfree(port);
1323
1324         return err;
1325 }
1326
1327 static void __team_port_change_port_removed(struct team_port *port);
1328
1329 static int team_port_del(struct team *team, struct net_device *port_dev)
1330 {
1331         struct net_device *dev = team->dev;
1332         struct team_port *port;
1333         char *portname = port_dev->name;
1334
1335         port = team_port_get_rtnl(port_dev);
1336         if (!port || !team_port_find(team, port)) {
1337                 netdev_err(dev, "Device %s does not act as a port of this team\n",
1338                            portname);
1339                 return -ENOENT;
1340         }
1341
1342         team_port_disable(team, port);
1343         list_del_rcu(&port->list);
1344
1345         if (dev->flags & IFF_PROMISC)
1346                 dev_set_promiscuity(port_dev, -1);
1347         if (dev->flags & IFF_ALLMULTI)
1348                 dev_set_allmulti(port_dev, -1);
1349
1350         team_upper_dev_unlink(team, port);
1351         netdev_rx_handler_unregister(port_dev);
1352         team_port_disable_netpoll(port);
1353         vlan_vids_del_by_dev(port_dev, dev);
1354         if (dev->flags & IFF_UP) {
1355                 dev_uc_unsync(port_dev, dev);
1356                 dev_mc_unsync(port_dev, dev);
1357         }
1358         dev_close(port_dev);
1359         team_port_leave(team, port);
1360
1361         __team_option_inst_mark_removed_port(team, port);
1362         __team_options_change_check(team);
1363         __team_option_inst_del_port(team, port);
1364         __team_port_change_port_removed(port);
1365
1366         team_port_set_orig_dev_addr(port);
1367         dev_set_mtu(port_dev, port->orig.mtu);
1368         kfree_rcu(port, rcu);
1369         netdev_info(dev, "Port device %s removed\n", portname);
1370         __team_compute_features(team);
1371
1372         return 0;
1373 }
1374
1375
1376 /*****************
1377  * Net device ops
1378  *****************/
1379
1380 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1381 {
1382         ctx->data.str_val = team->mode->kind;
1383         return 0;
1384 }
1385
1386 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1387 {
1388         return team_change_mode(team, ctx->data.str_val);
1389 }
1390
1391 static int team_notify_peers_count_get(struct team *team,
1392                                        struct team_gsetter_ctx *ctx)
1393 {
1394         ctx->data.u32_val = team->notify_peers.count;
1395         return 0;
1396 }
1397
1398 static int team_notify_peers_count_set(struct team *team,
1399                                        struct team_gsetter_ctx *ctx)
1400 {
1401         team->notify_peers.count = ctx->data.u32_val;
1402         return 0;
1403 }
1404
1405 static int team_notify_peers_interval_get(struct team *team,
1406                                           struct team_gsetter_ctx *ctx)
1407 {
1408         ctx->data.u32_val = team->notify_peers.interval;
1409         return 0;
1410 }
1411
1412 static int team_notify_peers_interval_set(struct team *team,
1413                                           struct team_gsetter_ctx *ctx)
1414 {
1415         team->notify_peers.interval = ctx->data.u32_val;
1416         return 0;
1417 }
1418
1419 static int team_mcast_rejoin_count_get(struct team *team,
1420                                        struct team_gsetter_ctx *ctx)
1421 {
1422         ctx->data.u32_val = team->mcast_rejoin.count;
1423         return 0;
1424 }
1425
1426 static int team_mcast_rejoin_count_set(struct team *team,
1427                                        struct team_gsetter_ctx *ctx)
1428 {
1429         team->mcast_rejoin.count = ctx->data.u32_val;
1430         return 0;
1431 }
1432
1433 static int team_mcast_rejoin_interval_get(struct team *team,
1434                                           struct team_gsetter_ctx *ctx)
1435 {
1436         ctx->data.u32_val = team->mcast_rejoin.interval;
1437         return 0;
1438 }
1439
1440 static int team_mcast_rejoin_interval_set(struct team *team,
1441                                           struct team_gsetter_ctx *ctx)
1442 {
1443         team->mcast_rejoin.interval = ctx->data.u32_val;
1444         return 0;
1445 }
1446
1447 static int team_port_en_option_get(struct team *team,
1448                                    struct team_gsetter_ctx *ctx)
1449 {
1450         struct team_port *port = ctx->info->port;
1451
1452         ctx->data.bool_val = team_port_enabled(port);
1453         return 0;
1454 }
1455
1456 static int team_port_en_option_set(struct team *team,
1457                                    struct team_gsetter_ctx *ctx)
1458 {
1459         struct team_port *port = ctx->info->port;
1460
1461         if (ctx->data.bool_val)
1462                 team_port_enable(team, port);
1463         else
1464                 team_port_disable(team, port);
1465         return 0;
1466 }
1467
1468 static int team_user_linkup_option_get(struct team *team,
1469                                        struct team_gsetter_ctx *ctx)
1470 {
1471         struct team_port *port = ctx->info->port;
1472
1473         ctx->data.bool_val = port->user.linkup;
1474         return 0;
1475 }
1476
1477 static void __team_carrier_check(struct team *team);
1478
1479 static int team_user_linkup_option_set(struct team *team,
1480                                        struct team_gsetter_ctx *ctx)
1481 {
1482         struct team_port *port = ctx->info->port;
1483
1484         port->user.linkup = ctx->data.bool_val;
1485         team_refresh_port_linkup(port);
1486         __team_carrier_check(port->team);
1487         return 0;
1488 }
1489
1490 static int team_user_linkup_en_option_get(struct team *team,
1491                                           struct team_gsetter_ctx *ctx)
1492 {
1493         struct team_port *port = ctx->info->port;
1494
1495         ctx->data.bool_val = port->user.linkup_enabled;
1496         return 0;
1497 }
1498
1499 static int team_user_linkup_en_option_set(struct team *team,
1500                                           struct team_gsetter_ctx *ctx)
1501 {
1502         struct team_port *port = ctx->info->port;
1503
1504         port->user.linkup_enabled = ctx->data.bool_val;
1505         team_refresh_port_linkup(port);
1506         __team_carrier_check(port->team);
1507         return 0;
1508 }
1509
1510 static int team_priority_option_get(struct team *team,
1511                                     struct team_gsetter_ctx *ctx)
1512 {
1513         struct team_port *port = ctx->info->port;
1514
1515         ctx->data.s32_val = port->priority;
1516         return 0;
1517 }
1518
1519 static int team_priority_option_set(struct team *team,
1520                                     struct team_gsetter_ctx *ctx)
1521 {
1522         struct team_port *port = ctx->info->port;
1523         s32 priority = ctx->data.s32_val;
1524
1525         if (port->priority == priority)
1526                 return 0;
1527         port->priority = priority;
1528         team_queue_override_port_prio_changed(team, port);
1529         return 0;
1530 }
1531
1532 static int team_queue_id_option_get(struct team *team,
1533                                     struct team_gsetter_ctx *ctx)
1534 {
1535         struct team_port *port = ctx->info->port;
1536
1537         ctx->data.u32_val = port->queue_id;
1538         return 0;
1539 }
1540
1541 static int team_queue_id_option_set(struct team *team,
1542                                     struct team_gsetter_ctx *ctx)
1543 {
1544         struct team_port *port = ctx->info->port;
1545         u16 new_queue_id = ctx->data.u32_val;
1546
1547         if (port->queue_id == new_queue_id)
1548                 return 0;
1549         if (new_queue_id >= team->dev->real_num_tx_queues)
1550                 return -EINVAL;
1551         team_queue_override_port_change_queue_id(team, port, new_queue_id);
1552         return 0;
1553 }
1554
1555 static const struct team_option team_options[] = {
1556         {
1557                 .name = "mode",
1558                 .type = TEAM_OPTION_TYPE_STRING,
1559                 .getter = team_mode_option_get,
1560                 .setter = team_mode_option_set,
1561         },
1562         {
1563                 .name = "notify_peers_count",
1564                 .type = TEAM_OPTION_TYPE_U32,
1565                 .getter = team_notify_peers_count_get,
1566                 .setter = team_notify_peers_count_set,
1567         },
1568         {
1569                 .name = "notify_peers_interval",
1570                 .type = TEAM_OPTION_TYPE_U32,
1571                 .getter = team_notify_peers_interval_get,
1572                 .setter = team_notify_peers_interval_set,
1573         },
1574         {
1575                 .name = "mcast_rejoin_count",
1576                 .type = TEAM_OPTION_TYPE_U32,
1577                 .getter = team_mcast_rejoin_count_get,
1578                 .setter = team_mcast_rejoin_count_set,
1579         },
1580         {
1581                 .name = "mcast_rejoin_interval",
1582                 .type = TEAM_OPTION_TYPE_U32,
1583                 .getter = team_mcast_rejoin_interval_get,
1584                 .setter = team_mcast_rejoin_interval_set,
1585         },
1586         {
1587                 .name = "enabled",
1588                 .type = TEAM_OPTION_TYPE_BOOL,
1589                 .per_port = true,
1590                 .getter = team_port_en_option_get,
1591                 .setter = team_port_en_option_set,
1592         },
1593         {
1594                 .name = "user_linkup",
1595                 .type = TEAM_OPTION_TYPE_BOOL,
1596                 .per_port = true,
1597                 .getter = team_user_linkup_option_get,
1598                 .setter = team_user_linkup_option_set,
1599         },
1600         {
1601                 .name = "user_linkup_enabled",
1602                 .type = TEAM_OPTION_TYPE_BOOL,
1603                 .per_port = true,
1604                 .getter = team_user_linkup_en_option_get,
1605                 .setter = team_user_linkup_en_option_set,
1606         },
1607         {
1608                 .name = "priority",
1609                 .type = TEAM_OPTION_TYPE_S32,
1610                 .per_port = true,
1611                 .getter = team_priority_option_get,
1612                 .setter = team_priority_option_set,
1613         },
1614         {
1615                 .name = "queue_id",
1616                 .type = TEAM_OPTION_TYPE_U32,
1617                 .per_port = true,
1618                 .getter = team_queue_id_option_get,
1619                 .setter = team_queue_id_option_set,
1620         },
1621 };
1622
1623
1624 static int team_init(struct net_device *dev)
1625 {
1626         struct team *team = netdev_priv(dev);
1627         int i;
1628         int err;
1629
1630         team->dev = dev;
1631         team_set_no_mode(team);
1632         team->notifier_ctx = false;
1633
1634         team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1635         if (!team->pcpu_stats)
1636                 return -ENOMEM;
1637
1638         for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1639                 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1640         INIT_LIST_HEAD(&team->port_list);
1641         err = team_queue_override_init(team);
1642         if (err)
1643                 goto err_team_queue_override_init;
1644
1645         team_adjust_ops(team);
1646
1647         INIT_LIST_HEAD(&team->option_list);
1648         INIT_LIST_HEAD(&team->option_inst_list);
1649
1650         team_notify_peers_init(team);
1651         team_mcast_rejoin_init(team);
1652
1653         err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1654         if (err)
1655                 goto err_options_register;
1656         netif_carrier_off(dev);
1657
1658         lockdep_register_key(&team->team_lock_key);
1659         __mutex_init(&team->lock, "team->team_lock_key", &team->team_lock_key);
1660         netdev_lockdep_set_classes(dev);
1661
1662         return 0;
1663
1664 err_options_register:
1665         team_mcast_rejoin_fini(team);
1666         team_notify_peers_fini(team);
1667         team_queue_override_fini(team);
1668 err_team_queue_override_init:
1669         free_percpu(team->pcpu_stats);
1670
1671         return err;
1672 }
1673
1674 static void team_uninit(struct net_device *dev)
1675 {
1676         struct team *team = netdev_priv(dev);
1677         struct team_port *port;
1678         struct team_port *tmp;
1679
1680         mutex_lock(&team->lock);
1681         list_for_each_entry_safe(port, tmp, &team->port_list, list)
1682                 team_port_del(team, port->dev);
1683
1684         __team_change_mode(team, NULL); /* cleanup */
1685         __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1686         team_mcast_rejoin_fini(team);
1687         team_notify_peers_fini(team);
1688         team_queue_override_fini(team);
1689         mutex_unlock(&team->lock);
1690         netdev_change_features(dev);
1691         lockdep_unregister_key(&team->team_lock_key);
1692 }
1693
1694 static void team_destructor(struct net_device *dev)
1695 {
1696         struct team *team = netdev_priv(dev);
1697
1698         free_percpu(team->pcpu_stats);
1699 }
1700
1701 static int team_open(struct net_device *dev)
1702 {
1703         return 0;
1704 }
1705
1706 static int team_close(struct net_device *dev)
1707 {
1708         struct team *team = netdev_priv(dev);
1709         struct team_port *port;
1710
1711         list_for_each_entry(port, &team->port_list, list) {
1712                 dev_uc_unsync(port->dev, dev);
1713                 dev_mc_unsync(port->dev, dev);
1714         }
1715
1716         return 0;
1717 }
1718
1719 /*
1720  * note: already called with rcu_read_lock
1721  */
1722 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1723 {
1724         struct team *team = netdev_priv(dev);
1725         bool tx_success;
1726         unsigned int len = skb->len;
1727
1728         tx_success = team_queue_override_transmit(team, skb);
1729         if (!tx_success)
1730                 tx_success = team->ops.transmit(team, skb);
1731         if (tx_success) {
1732                 struct team_pcpu_stats *pcpu_stats;
1733
1734                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1735                 u64_stats_update_begin(&pcpu_stats->syncp);
1736                 u64_stats_inc(&pcpu_stats->tx_packets);
1737                 u64_stats_add(&pcpu_stats->tx_bytes, len);
1738                 u64_stats_update_end(&pcpu_stats->syncp);
1739         } else {
1740                 this_cpu_inc(team->pcpu_stats->tx_dropped);
1741         }
1742
1743         return NETDEV_TX_OK;
1744 }
1745
1746 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1747                              struct net_device *sb_dev)
1748 {
1749         /*
1750          * This helper function exists to help dev_pick_tx get the correct
1751          * destination queue.  Using a helper function skips a call to
1752          * skb_tx_hash and will put the skbs in the queue we expect on their
1753          * way down to the team driver.
1754          */
1755         u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1756
1757         /*
1758          * Save the original txq to restore before passing to the driver
1759          */
1760         qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1761
1762         if (unlikely(txq >= dev->real_num_tx_queues)) {
1763                 do {
1764                         txq -= dev->real_num_tx_queues;
1765                 } while (txq >= dev->real_num_tx_queues);
1766         }
1767         return txq;
1768 }
1769
1770 static void team_change_rx_flags(struct net_device *dev, int change)
1771 {
1772         struct team *team = netdev_priv(dev);
1773         struct team_port *port;
1774         int inc;
1775
1776         rcu_read_lock();
1777         list_for_each_entry_rcu(port, &team->port_list, list) {
1778                 if (change & IFF_PROMISC) {
1779                         inc = dev->flags & IFF_PROMISC ? 1 : -1;
1780                         dev_set_promiscuity(port->dev, inc);
1781                 }
1782                 if (change & IFF_ALLMULTI) {
1783                         inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1784                         dev_set_allmulti(port->dev, inc);
1785                 }
1786         }
1787         rcu_read_unlock();
1788 }
1789
1790 static void team_set_rx_mode(struct net_device *dev)
1791 {
1792         struct team *team = netdev_priv(dev);
1793         struct team_port *port;
1794
1795         rcu_read_lock();
1796         list_for_each_entry_rcu(port, &team->port_list, list) {
1797                 dev_uc_sync_multiple(port->dev, dev);
1798                 dev_mc_sync_multiple(port->dev, dev);
1799         }
1800         rcu_read_unlock();
1801 }
1802
1803 static int team_set_mac_address(struct net_device *dev, void *p)
1804 {
1805         struct sockaddr *addr = p;
1806         struct team *team = netdev_priv(dev);
1807         struct team_port *port;
1808
1809         if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1810                 return -EADDRNOTAVAIL;
1811         dev_addr_set(dev, addr->sa_data);
1812         mutex_lock(&team->lock);
1813         list_for_each_entry(port, &team->port_list, list)
1814                 if (team->ops.port_change_dev_addr)
1815                         team->ops.port_change_dev_addr(team, port);
1816         mutex_unlock(&team->lock);
1817         return 0;
1818 }
1819
1820 static int team_change_mtu(struct net_device *dev, int new_mtu)
1821 {
1822         struct team *team = netdev_priv(dev);
1823         struct team_port *port;
1824         int err;
1825
1826         /*
1827          * Alhough this is reader, it's guarded by team lock. It's not possible
1828          * to traverse list in reverse under rcu_read_lock
1829          */
1830         mutex_lock(&team->lock);
1831         team->port_mtu_change_allowed = true;
1832         list_for_each_entry(port, &team->port_list, list) {
1833                 err = dev_set_mtu(port->dev, new_mtu);
1834                 if (err) {
1835                         netdev_err(dev, "Device %s failed to change mtu",
1836                                    port->dev->name);
1837                         goto unwind;
1838                 }
1839         }
1840         team->port_mtu_change_allowed = false;
1841         mutex_unlock(&team->lock);
1842
1843         dev->mtu = new_mtu;
1844
1845         return 0;
1846
1847 unwind:
1848         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1849                 dev_set_mtu(port->dev, dev->mtu);
1850         team->port_mtu_change_allowed = false;
1851         mutex_unlock(&team->lock);
1852
1853         return err;
1854 }
1855
1856 static void
1857 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1858 {
1859         struct team *team = netdev_priv(dev);
1860         struct team_pcpu_stats *p;
1861         u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1862         u32 rx_dropped = 0, tx_dropped = 0, rx_nohandler = 0;
1863         unsigned int start;
1864         int i;
1865
1866         for_each_possible_cpu(i) {
1867                 p = per_cpu_ptr(team->pcpu_stats, i);
1868                 do {
1869                         start = u64_stats_fetch_begin(&p->syncp);
1870                         rx_packets      = u64_stats_read(&p->rx_packets);
1871                         rx_bytes        = u64_stats_read(&p->rx_bytes);
1872                         rx_multicast    = u64_stats_read(&p->rx_multicast);
1873                         tx_packets      = u64_stats_read(&p->tx_packets);
1874                         tx_bytes        = u64_stats_read(&p->tx_bytes);
1875                 } while (u64_stats_fetch_retry(&p->syncp, start));
1876
1877                 stats->rx_packets       += rx_packets;
1878                 stats->rx_bytes         += rx_bytes;
1879                 stats->multicast        += rx_multicast;
1880                 stats->tx_packets       += tx_packets;
1881                 stats->tx_bytes         += tx_bytes;
1882                 /*
1883                  * rx_dropped, tx_dropped & rx_nohandler are u32,
1884                  * updated without syncp protection.
1885                  */
1886                 rx_dropped      += READ_ONCE(p->rx_dropped);
1887                 tx_dropped      += READ_ONCE(p->tx_dropped);
1888                 rx_nohandler    += READ_ONCE(p->rx_nohandler);
1889         }
1890         stats->rx_dropped       = rx_dropped;
1891         stats->tx_dropped       = tx_dropped;
1892         stats->rx_nohandler     = rx_nohandler;
1893 }
1894
1895 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1896 {
1897         struct team *team = netdev_priv(dev);
1898         struct team_port *port;
1899         int err;
1900
1901         /*
1902          * Alhough this is reader, it's guarded by team lock. It's not possible
1903          * to traverse list in reverse under rcu_read_lock
1904          */
1905         mutex_lock(&team->lock);
1906         list_for_each_entry(port, &team->port_list, list) {
1907                 err = vlan_vid_add(port->dev, proto, vid);
1908                 if (err)
1909                         goto unwind;
1910         }
1911         mutex_unlock(&team->lock);
1912
1913         return 0;
1914
1915 unwind:
1916         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1917                 vlan_vid_del(port->dev, proto, vid);
1918         mutex_unlock(&team->lock);
1919
1920         return err;
1921 }
1922
1923 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1924 {
1925         struct team *team = netdev_priv(dev);
1926         struct team_port *port;
1927
1928         mutex_lock(&team->lock);
1929         list_for_each_entry(port, &team->port_list, list)
1930                 vlan_vid_del(port->dev, proto, vid);
1931         mutex_unlock(&team->lock);
1932
1933         return 0;
1934 }
1935
1936 #ifdef CONFIG_NET_POLL_CONTROLLER
1937 static void team_poll_controller(struct net_device *dev)
1938 {
1939 }
1940
1941 static void __team_netpoll_cleanup(struct team *team)
1942 {
1943         struct team_port *port;
1944
1945         list_for_each_entry(port, &team->port_list, list)
1946                 team_port_disable_netpoll(port);
1947 }
1948
1949 static void team_netpoll_cleanup(struct net_device *dev)
1950 {
1951         struct team *team = netdev_priv(dev);
1952
1953         mutex_lock(&team->lock);
1954         __team_netpoll_cleanup(team);
1955         mutex_unlock(&team->lock);
1956 }
1957
1958 static int team_netpoll_setup(struct net_device *dev,
1959                               struct netpoll_info *npifo)
1960 {
1961         struct team *team = netdev_priv(dev);
1962         struct team_port *port;
1963         int err = 0;
1964
1965         mutex_lock(&team->lock);
1966         list_for_each_entry(port, &team->port_list, list) {
1967                 err = __team_port_enable_netpoll(port);
1968                 if (err) {
1969                         __team_netpoll_cleanup(team);
1970                         break;
1971                 }
1972         }
1973         mutex_unlock(&team->lock);
1974         return err;
1975 }
1976 #endif
1977
1978 static int team_add_slave(struct net_device *dev, struct net_device *port_dev,
1979                           struct netlink_ext_ack *extack)
1980 {
1981         struct team *team = netdev_priv(dev);
1982         int err;
1983
1984         mutex_lock(&team->lock);
1985         err = team_port_add(team, port_dev, extack);
1986         mutex_unlock(&team->lock);
1987
1988         if (!err)
1989                 netdev_change_features(dev);
1990
1991         return err;
1992 }
1993
1994 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1995 {
1996         struct team *team = netdev_priv(dev);
1997         int err;
1998
1999         mutex_lock(&team->lock);
2000         err = team_port_del(team, port_dev);
2001         mutex_unlock(&team->lock);
2002
2003         if (err)
2004                 return err;
2005
2006         if (netif_is_team_master(port_dev)) {
2007                 lockdep_unregister_key(&team->team_lock_key);
2008                 lockdep_register_key(&team->team_lock_key);
2009                 lockdep_set_class(&team->lock, &team->team_lock_key);
2010         }
2011         netdev_change_features(dev);
2012
2013         return err;
2014 }
2015
2016 static netdev_features_t team_fix_features(struct net_device *dev,
2017                                            netdev_features_t features)
2018 {
2019         struct team_port *port;
2020         struct team *team = netdev_priv(dev);
2021         netdev_features_t mask;
2022
2023         mask = features;
2024         features &= ~NETIF_F_ONE_FOR_ALL;
2025         features |= NETIF_F_ALL_FOR_ALL;
2026
2027         rcu_read_lock();
2028         list_for_each_entry_rcu(port, &team->port_list, list) {
2029                 features = netdev_increment_features(features,
2030                                                      port->dev->features,
2031                                                      mask);
2032         }
2033         rcu_read_unlock();
2034
2035         features = netdev_add_tso_features(features, mask);
2036
2037         return features;
2038 }
2039
2040 static int team_change_carrier(struct net_device *dev, bool new_carrier)
2041 {
2042         struct team *team = netdev_priv(dev);
2043
2044         team->user_carrier_enabled = true;
2045
2046         if (new_carrier)
2047                 netif_carrier_on(dev);
2048         else
2049                 netif_carrier_off(dev);
2050         return 0;
2051 }
2052
2053 static const struct net_device_ops team_netdev_ops = {
2054         .ndo_init               = team_init,
2055         .ndo_uninit             = team_uninit,
2056         .ndo_open               = team_open,
2057         .ndo_stop               = team_close,
2058         .ndo_start_xmit         = team_xmit,
2059         .ndo_select_queue       = team_select_queue,
2060         .ndo_change_rx_flags    = team_change_rx_flags,
2061         .ndo_set_rx_mode        = team_set_rx_mode,
2062         .ndo_set_mac_address    = team_set_mac_address,
2063         .ndo_change_mtu         = team_change_mtu,
2064         .ndo_get_stats64        = team_get_stats64,
2065         .ndo_vlan_rx_add_vid    = team_vlan_rx_add_vid,
2066         .ndo_vlan_rx_kill_vid   = team_vlan_rx_kill_vid,
2067 #ifdef CONFIG_NET_POLL_CONTROLLER
2068         .ndo_poll_controller    = team_poll_controller,
2069         .ndo_netpoll_setup      = team_netpoll_setup,
2070         .ndo_netpoll_cleanup    = team_netpoll_cleanup,
2071 #endif
2072         .ndo_add_slave          = team_add_slave,
2073         .ndo_del_slave          = team_del_slave,
2074         .ndo_fix_features       = team_fix_features,
2075         .ndo_change_carrier     = team_change_carrier,
2076         .ndo_features_check     = passthru_features_check,
2077 };
2078
2079 /***********************
2080  * ethtool interface
2081  ***********************/
2082
2083 static void team_ethtool_get_drvinfo(struct net_device *dev,
2084                                      struct ethtool_drvinfo *drvinfo)
2085 {
2086         strscpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
2087         strscpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2088 }
2089
2090 static int team_ethtool_get_link_ksettings(struct net_device *dev,
2091                                            struct ethtool_link_ksettings *cmd)
2092 {
2093         struct team *team= netdev_priv(dev);
2094         unsigned long speed = 0;
2095         struct team_port *port;
2096
2097         cmd->base.duplex = DUPLEX_UNKNOWN;
2098         cmd->base.port = PORT_OTHER;
2099
2100         rcu_read_lock();
2101         list_for_each_entry_rcu(port, &team->port_list, list) {
2102                 if (team_port_txable(port)) {
2103                         if (port->state.speed != SPEED_UNKNOWN)
2104                                 speed += port->state.speed;
2105                         if (cmd->base.duplex == DUPLEX_UNKNOWN &&
2106                             port->state.duplex != DUPLEX_UNKNOWN)
2107                                 cmd->base.duplex = port->state.duplex;
2108                 }
2109         }
2110         rcu_read_unlock();
2111
2112         cmd->base.speed = speed ? : SPEED_UNKNOWN;
2113
2114         return 0;
2115 }
2116
2117 static const struct ethtool_ops team_ethtool_ops = {
2118         .get_drvinfo            = team_ethtool_get_drvinfo,
2119         .get_link               = ethtool_op_get_link,
2120         .get_link_ksettings     = team_ethtool_get_link_ksettings,
2121 };
2122
2123 /***********************
2124  * rt netlink interface
2125  ***********************/
2126
2127 static void team_setup_by_port(struct net_device *dev,
2128                                struct net_device *port_dev)
2129 {
2130         dev->header_ops = port_dev->header_ops;
2131         dev->type = port_dev->type;
2132         dev->hard_header_len = port_dev->hard_header_len;
2133         dev->needed_headroom = port_dev->needed_headroom;
2134         dev->addr_len = port_dev->addr_len;
2135         dev->mtu = port_dev->mtu;
2136         memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2137         eth_hw_addr_inherit(dev, port_dev);
2138
2139         if (port_dev->flags & IFF_POINTOPOINT) {
2140                 dev->flags &= ~(IFF_BROADCAST | IFF_MULTICAST);
2141                 dev->flags |= (IFF_POINTOPOINT | IFF_NOARP);
2142         } else if ((port_dev->flags & (IFF_BROADCAST | IFF_MULTICAST)) ==
2143                     (IFF_BROADCAST | IFF_MULTICAST)) {
2144                 dev->flags |= (IFF_BROADCAST | IFF_MULTICAST);
2145                 dev->flags &= ~(IFF_POINTOPOINT | IFF_NOARP);
2146         }
2147 }
2148
2149 static int team_dev_type_check_change(struct net_device *dev,
2150                                       struct net_device *port_dev)
2151 {
2152         struct team *team = netdev_priv(dev);
2153         char *portname = port_dev->name;
2154         int err;
2155
2156         if (dev->type == port_dev->type)
2157                 return 0;
2158         if (!list_empty(&team->port_list)) {
2159                 netdev_err(dev, "Device %s is of different type\n", portname);
2160                 return -EBUSY;
2161         }
2162         err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2163         err = notifier_to_errno(err);
2164         if (err) {
2165                 netdev_err(dev, "Refused to change device type\n");
2166                 return err;
2167         }
2168         dev_uc_flush(dev);
2169         dev_mc_flush(dev);
2170         team_setup_by_port(dev, port_dev);
2171         call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2172         return 0;
2173 }
2174
2175 static void team_setup(struct net_device *dev)
2176 {
2177         ether_setup(dev);
2178         dev->max_mtu = ETH_MAX_MTU;
2179
2180         dev->netdev_ops = &team_netdev_ops;
2181         dev->ethtool_ops = &team_ethtool_ops;
2182         dev->needs_free_netdev = true;
2183         dev->priv_destructor = team_destructor;
2184         dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2185         dev->priv_flags |= IFF_NO_QUEUE;
2186         dev->priv_flags |= IFF_TEAM;
2187
2188         /*
2189          * Indicate we support unicast address filtering. That way core won't
2190          * bring us to promisc mode in case a unicast addr is added.
2191          * Let this up to underlay drivers.
2192          */
2193         dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2194
2195         dev->features |= NETIF_F_LLTX;
2196         dev->features |= NETIF_F_GRO;
2197
2198         /* Don't allow team devices to change network namespaces. */
2199         dev->features |= NETIF_F_NETNS_LOCAL;
2200
2201         dev->hw_features = TEAM_VLAN_FEATURES |
2202                            NETIF_F_HW_VLAN_CTAG_RX |
2203                            NETIF_F_HW_VLAN_CTAG_FILTER |
2204                            NETIF_F_HW_VLAN_STAG_RX |
2205                            NETIF_F_HW_VLAN_STAG_FILTER;
2206
2207         dev->hw_features |= NETIF_F_GSO_ENCAP_ALL;
2208         dev->features |= dev->hw_features;
2209         dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
2210 }
2211
2212 static int team_newlink(struct net *src_net, struct net_device *dev,
2213                         struct nlattr *tb[], struct nlattr *data[],
2214                         struct netlink_ext_ack *extack)
2215 {
2216         if (tb[IFLA_ADDRESS] == NULL)
2217                 eth_hw_addr_random(dev);
2218
2219         return register_netdevice(dev);
2220 }
2221
2222 static int team_validate(struct nlattr *tb[], struct nlattr *data[],
2223                          struct netlink_ext_ack *extack)
2224 {
2225         if (tb[IFLA_ADDRESS]) {
2226                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2227                         return -EINVAL;
2228                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2229                         return -EADDRNOTAVAIL;
2230         }
2231         return 0;
2232 }
2233
2234 static unsigned int team_get_num_tx_queues(void)
2235 {
2236         return TEAM_DEFAULT_NUM_TX_QUEUES;
2237 }
2238
2239 static unsigned int team_get_num_rx_queues(void)
2240 {
2241         return TEAM_DEFAULT_NUM_RX_QUEUES;
2242 }
2243
2244 static struct rtnl_link_ops team_link_ops __read_mostly = {
2245         .kind                   = DRV_NAME,
2246         .priv_size              = sizeof(struct team),
2247         .setup                  = team_setup,
2248         .newlink                = team_newlink,
2249         .validate               = team_validate,
2250         .get_num_tx_queues      = team_get_num_tx_queues,
2251         .get_num_rx_queues      = team_get_num_rx_queues,
2252 };
2253
2254
2255 /***********************************
2256  * Generic netlink custom interface
2257  ***********************************/
2258
2259 static struct genl_family team_nl_family;
2260
2261 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2262         [TEAM_ATTR_UNSPEC]                      = { .type = NLA_UNSPEC, },
2263         [TEAM_ATTR_TEAM_IFINDEX]                = { .type = NLA_U32 },
2264         [TEAM_ATTR_LIST_OPTION]                 = { .type = NLA_NESTED },
2265         [TEAM_ATTR_LIST_PORT]                   = { .type = NLA_NESTED },
2266 };
2267
2268 static const struct nla_policy
2269 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2270         [TEAM_ATTR_OPTION_UNSPEC]               = { .type = NLA_UNSPEC, },
2271         [TEAM_ATTR_OPTION_NAME] = {
2272                 .type = NLA_STRING,
2273                 .len = TEAM_STRING_MAX_LEN,
2274         },
2275         [TEAM_ATTR_OPTION_CHANGED]              = { .type = NLA_FLAG },
2276         [TEAM_ATTR_OPTION_TYPE]                 = { .type = NLA_U8 },
2277         [TEAM_ATTR_OPTION_DATA]                 = { .type = NLA_BINARY },
2278         [TEAM_ATTR_OPTION_PORT_IFINDEX]         = { .type = NLA_U32 },
2279         [TEAM_ATTR_OPTION_ARRAY_INDEX]          = { .type = NLA_U32 },
2280 };
2281
2282 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2283 {
2284         struct sk_buff *msg;
2285         void *hdr;
2286         int err;
2287
2288         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2289         if (!msg)
2290                 return -ENOMEM;
2291
2292         hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2293                           &team_nl_family, 0, TEAM_CMD_NOOP);
2294         if (!hdr) {
2295                 err = -EMSGSIZE;
2296                 goto err_msg_put;
2297         }
2298
2299         genlmsg_end(msg, hdr);
2300
2301         return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2302
2303 err_msg_put:
2304         nlmsg_free(msg);
2305
2306         return err;
2307 }
2308
2309 /*
2310  * Netlink cmd functions should be locked by following two functions.
2311  * Since dev gets held here, that ensures dev won't disappear in between.
2312  */
2313 static struct team *team_nl_team_get(struct genl_info *info)
2314 {
2315         struct net *net = genl_info_net(info);
2316         int ifindex;
2317         struct net_device *dev;
2318         struct team *team;
2319
2320         if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2321                 return NULL;
2322
2323         ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2324         dev = dev_get_by_index(net, ifindex);
2325         if (!dev || dev->netdev_ops != &team_netdev_ops) {
2326                 if (dev)
2327                         dev_put(dev);
2328                 return NULL;
2329         }
2330
2331         team = netdev_priv(dev);
2332         mutex_lock(&team->lock);
2333         return team;
2334 }
2335
2336 static void team_nl_team_put(struct team *team)
2337 {
2338         mutex_unlock(&team->lock);
2339         dev_put(team->dev);
2340 }
2341
2342 typedef int team_nl_send_func_t(struct sk_buff *skb,
2343                                 struct team *team, u32 portid);
2344
2345 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2346 {
2347         return genlmsg_unicast(dev_net(team->dev), skb, portid);
2348 }
2349
2350 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2351                                        struct team_option_inst *opt_inst)
2352 {
2353         struct nlattr *option_item;
2354         struct team_option *option = opt_inst->option;
2355         struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2356         struct team_gsetter_ctx ctx;
2357         int err;
2358
2359         ctx.info = opt_inst_info;
2360         err = team_option_get(team, opt_inst, &ctx);
2361         if (err)
2362                 return err;
2363
2364         option_item = nla_nest_start_noflag(skb, TEAM_ATTR_ITEM_OPTION);
2365         if (!option_item)
2366                 return -EMSGSIZE;
2367
2368         if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2369                 goto nest_cancel;
2370         if (opt_inst_info->port &&
2371             nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2372                         opt_inst_info->port->dev->ifindex))
2373                 goto nest_cancel;
2374         if (opt_inst->option->array_size &&
2375             nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2376                         opt_inst_info->array_index))
2377                 goto nest_cancel;
2378
2379         switch (option->type) {
2380         case TEAM_OPTION_TYPE_U32:
2381                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2382                         goto nest_cancel;
2383                 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2384                         goto nest_cancel;
2385                 break;
2386         case TEAM_OPTION_TYPE_STRING:
2387                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2388                         goto nest_cancel;
2389                 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2390                                    ctx.data.str_val))
2391                         goto nest_cancel;
2392                 break;
2393         case TEAM_OPTION_TYPE_BINARY:
2394                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2395                         goto nest_cancel;
2396                 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2397                             ctx.data.bin_val.ptr))
2398                         goto nest_cancel;
2399                 break;
2400         case TEAM_OPTION_TYPE_BOOL:
2401                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2402                         goto nest_cancel;
2403                 if (ctx.data.bool_val &&
2404                     nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2405                         goto nest_cancel;
2406                 break;
2407         case TEAM_OPTION_TYPE_S32:
2408                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2409                         goto nest_cancel;
2410                 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2411                         goto nest_cancel;
2412                 break;
2413         default:
2414                 BUG();
2415         }
2416         if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2417                 goto nest_cancel;
2418         if (opt_inst->changed) {
2419                 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2420                         goto nest_cancel;
2421                 opt_inst->changed = false;
2422         }
2423         nla_nest_end(skb, option_item);
2424         return 0;
2425
2426 nest_cancel:
2427         nla_nest_cancel(skb, option_item);
2428         return -EMSGSIZE;
2429 }
2430
2431 static int __send_and_alloc_skb(struct sk_buff **pskb,
2432                                 struct team *team, u32 portid,
2433                                 team_nl_send_func_t *send_func)
2434 {
2435         int err;
2436
2437         if (*pskb) {
2438                 err = send_func(*pskb, team, portid);
2439                 if (err)
2440                         return err;
2441         }
2442         *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2443         if (!*pskb)
2444                 return -ENOMEM;
2445         return 0;
2446 }
2447
2448 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2449                                     int flags, team_nl_send_func_t *send_func,
2450                                     struct list_head *sel_opt_inst_list)
2451 {
2452         struct nlattr *option_list;
2453         struct nlmsghdr *nlh;
2454         void *hdr;
2455         struct team_option_inst *opt_inst;
2456         int err;
2457         struct sk_buff *skb = NULL;
2458         bool incomplete;
2459         int i;
2460
2461         opt_inst = list_first_entry(sel_opt_inst_list,
2462                                     struct team_option_inst, tmp_list);
2463
2464 start_again:
2465         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2466         if (err)
2467                 return err;
2468
2469         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2470                           TEAM_CMD_OPTIONS_GET);
2471         if (!hdr) {
2472                 nlmsg_free(skb);
2473                 return -EMSGSIZE;
2474         }
2475
2476         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2477                 goto nla_put_failure;
2478         option_list = nla_nest_start_noflag(skb, TEAM_ATTR_LIST_OPTION);
2479         if (!option_list)
2480                 goto nla_put_failure;
2481
2482         i = 0;
2483         incomplete = false;
2484         list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2485                 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2486                 if (err) {
2487                         if (err == -EMSGSIZE) {
2488                                 if (!i)
2489                                         goto errout;
2490                                 incomplete = true;
2491                                 break;
2492                         }
2493                         goto errout;
2494                 }
2495                 i++;
2496         }
2497
2498         nla_nest_end(skb, option_list);
2499         genlmsg_end(skb, hdr);
2500         if (incomplete)
2501                 goto start_again;
2502
2503 send_done:
2504         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2505         if (!nlh) {
2506                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2507                 if (err)
2508                         return err;
2509                 goto send_done;
2510         }
2511
2512         return send_func(skb, team, portid);
2513
2514 nla_put_failure:
2515         err = -EMSGSIZE;
2516 errout:
2517         nlmsg_free(skb);
2518         return err;
2519 }
2520
2521 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2522 {
2523         struct team *team;
2524         struct team_option_inst *opt_inst;
2525         int err;
2526         LIST_HEAD(sel_opt_inst_list);
2527
2528         team = team_nl_team_get(info);
2529         if (!team)
2530                 return -EINVAL;
2531
2532         list_for_each_entry(opt_inst, &team->option_inst_list, list)
2533                 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2534         err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2535                                        NLM_F_ACK, team_nl_send_unicast,
2536                                        &sel_opt_inst_list);
2537
2538         team_nl_team_put(team);
2539
2540         return err;
2541 }
2542
2543 static int team_nl_send_event_options_get(struct team *team,
2544                                           struct list_head *sel_opt_inst_list);
2545
2546 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2547 {
2548         struct team *team;
2549         int err = 0;
2550         int i;
2551         struct nlattr *nl_option;
2552
2553         rtnl_lock();
2554
2555         team = team_nl_team_get(info);
2556         if (!team) {
2557                 err = -EINVAL;
2558                 goto rtnl_unlock;
2559         }
2560
2561         err = -EINVAL;
2562         if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2563                 err = -EINVAL;
2564                 goto team_put;
2565         }
2566
2567         nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2568                 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2569                 struct nlattr *attr;
2570                 struct nlattr *attr_data;
2571                 LIST_HEAD(opt_inst_list);
2572                 enum team_option_type opt_type;
2573                 int opt_port_ifindex = 0; /* != 0 for per-port options */
2574                 u32 opt_array_index = 0;
2575                 bool opt_is_array = false;
2576                 struct team_option_inst *opt_inst;
2577                 char *opt_name;
2578                 bool opt_found = false;
2579
2580                 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2581                         err = -EINVAL;
2582                         goto team_put;
2583                 }
2584                 err = nla_parse_nested_deprecated(opt_attrs,
2585                                                   TEAM_ATTR_OPTION_MAX,
2586                                                   nl_option,
2587                                                   team_nl_option_policy,
2588                                                   info->extack);
2589                 if (err)
2590                         goto team_put;
2591                 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2592                     !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2593                         err = -EINVAL;
2594                         goto team_put;
2595                 }
2596                 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2597                 case NLA_U32:
2598                         opt_type = TEAM_OPTION_TYPE_U32;
2599                         break;
2600                 case NLA_STRING:
2601                         opt_type = TEAM_OPTION_TYPE_STRING;
2602                         break;
2603                 case NLA_BINARY:
2604                         opt_type = TEAM_OPTION_TYPE_BINARY;
2605                         break;
2606                 case NLA_FLAG:
2607                         opt_type = TEAM_OPTION_TYPE_BOOL;
2608                         break;
2609                 case NLA_S32:
2610                         opt_type = TEAM_OPTION_TYPE_S32;
2611                         break;
2612                 default:
2613                         goto team_put;
2614                 }
2615
2616                 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2617                 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2618                         err = -EINVAL;
2619                         goto team_put;
2620                 }
2621
2622                 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2623                 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2624                 if (attr)
2625                         opt_port_ifindex = nla_get_u32(attr);
2626
2627                 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2628                 if (attr) {
2629                         opt_is_array = true;
2630                         opt_array_index = nla_get_u32(attr);
2631                 }
2632
2633                 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2634                         struct team_option *option = opt_inst->option;
2635                         struct team_gsetter_ctx ctx;
2636                         struct team_option_inst_info *opt_inst_info;
2637                         int tmp_ifindex;
2638
2639                         opt_inst_info = &opt_inst->info;
2640                         tmp_ifindex = opt_inst_info->port ?
2641                                       opt_inst_info->port->dev->ifindex : 0;
2642                         if (option->type != opt_type ||
2643                             strcmp(option->name, opt_name) ||
2644                             tmp_ifindex != opt_port_ifindex ||
2645                             (option->array_size && !opt_is_array) ||
2646                             opt_inst_info->array_index != opt_array_index)
2647                                 continue;
2648                         opt_found = true;
2649                         ctx.info = opt_inst_info;
2650                         switch (opt_type) {
2651                         case TEAM_OPTION_TYPE_U32:
2652                                 ctx.data.u32_val = nla_get_u32(attr_data);
2653                                 break;
2654                         case TEAM_OPTION_TYPE_STRING:
2655                                 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2656                                         err = -EINVAL;
2657                                         goto team_put;
2658                                 }
2659                                 ctx.data.str_val = nla_data(attr_data);
2660                                 break;
2661                         case TEAM_OPTION_TYPE_BINARY:
2662                                 ctx.data.bin_val.len = nla_len(attr_data);
2663                                 ctx.data.bin_val.ptr = nla_data(attr_data);
2664                                 break;
2665                         case TEAM_OPTION_TYPE_BOOL:
2666                                 ctx.data.bool_val = attr_data ? true : false;
2667                                 break;
2668                         case TEAM_OPTION_TYPE_S32:
2669                                 ctx.data.s32_val = nla_get_s32(attr_data);
2670                                 break;
2671                         default:
2672                                 BUG();
2673                         }
2674                         err = team_option_set(team, opt_inst, &ctx);
2675                         if (err)
2676                                 goto team_put;
2677                         opt_inst->changed = true;
2678                         list_add(&opt_inst->tmp_list, &opt_inst_list);
2679                 }
2680                 if (!opt_found) {
2681                         err = -ENOENT;
2682                         goto team_put;
2683                 }
2684
2685                 err = team_nl_send_event_options_get(team, &opt_inst_list);
2686                 if (err)
2687                         break;
2688         }
2689
2690 team_put:
2691         team_nl_team_put(team);
2692 rtnl_unlock:
2693         rtnl_unlock();
2694         return err;
2695 }
2696
2697 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2698                                      struct team_port *port)
2699 {
2700         struct nlattr *port_item;
2701
2702         port_item = nla_nest_start_noflag(skb, TEAM_ATTR_ITEM_PORT);
2703         if (!port_item)
2704                 goto nest_cancel;
2705         if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2706                 goto nest_cancel;
2707         if (port->changed) {
2708                 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2709                         goto nest_cancel;
2710                 port->changed = false;
2711         }
2712         if ((port->removed &&
2713              nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2714             (port->state.linkup &&
2715              nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2716             nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2717             nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2718                 goto nest_cancel;
2719         nla_nest_end(skb, port_item);
2720         return 0;
2721
2722 nest_cancel:
2723         nla_nest_cancel(skb, port_item);
2724         return -EMSGSIZE;
2725 }
2726
2727 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2728                                       int flags, team_nl_send_func_t *send_func,
2729                                       struct team_port *one_port)
2730 {
2731         struct nlattr *port_list;
2732         struct nlmsghdr *nlh;
2733         void *hdr;
2734         struct team_port *port;
2735         int err;
2736         struct sk_buff *skb = NULL;
2737         bool incomplete;
2738         int i;
2739
2740         port = list_first_entry_or_null(&team->port_list,
2741                                         struct team_port, list);
2742
2743 start_again:
2744         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2745         if (err)
2746                 return err;
2747
2748         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2749                           TEAM_CMD_PORT_LIST_GET);
2750         if (!hdr) {
2751                 nlmsg_free(skb);
2752                 return -EMSGSIZE;
2753         }
2754
2755         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2756                 goto nla_put_failure;
2757         port_list = nla_nest_start_noflag(skb, TEAM_ATTR_LIST_PORT);
2758         if (!port_list)
2759                 goto nla_put_failure;
2760
2761         i = 0;
2762         incomplete = false;
2763
2764         /* If one port is selected, called wants to send port list containing
2765          * only this port. Otherwise go through all listed ports and send all
2766          */
2767         if (one_port) {
2768                 err = team_nl_fill_one_port_get(skb, one_port);
2769                 if (err)
2770                         goto errout;
2771         } else if (port) {
2772                 list_for_each_entry_from(port, &team->port_list, list) {
2773                         err = team_nl_fill_one_port_get(skb, port);
2774                         if (err) {
2775                                 if (err == -EMSGSIZE) {
2776                                         if (!i)
2777                                                 goto errout;
2778                                         incomplete = true;
2779                                         break;
2780                                 }
2781                                 goto errout;
2782                         }
2783                         i++;
2784                 }
2785         }
2786
2787         nla_nest_end(skb, port_list);
2788         genlmsg_end(skb, hdr);
2789         if (incomplete)
2790                 goto start_again;
2791
2792 send_done:
2793         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2794         if (!nlh) {
2795                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2796                 if (err)
2797                         return err;
2798                 goto send_done;
2799         }
2800
2801         return send_func(skb, team, portid);
2802
2803 nla_put_failure:
2804         err = -EMSGSIZE;
2805 errout:
2806         nlmsg_free(skb);
2807         return err;
2808 }
2809
2810 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2811                                      struct genl_info *info)
2812 {
2813         struct team *team;
2814         int err;
2815
2816         team = team_nl_team_get(info);
2817         if (!team)
2818                 return -EINVAL;
2819
2820         err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2821                                          NLM_F_ACK, team_nl_send_unicast, NULL);
2822
2823         team_nl_team_put(team);
2824
2825         return err;
2826 }
2827
2828 static const struct genl_small_ops team_nl_ops[] = {
2829         {
2830                 .cmd = TEAM_CMD_NOOP,
2831                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2832                 .doit = team_nl_cmd_noop,
2833         },
2834         {
2835                 .cmd = TEAM_CMD_OPTIONS_SET,
2836                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2837                 .doit = team_nl_cmd_options_set,
2838                 .flags = GENL_ADMIN_PERM,
2839         },
2840         {
2841                 .cmd = TEAM_CMD_OPTIONS_GET,
2842                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2843                 .doit = team_nl_cmd_options_get,
2844                 .flags = GENL_ADMIN_PERM,
2845         },
2846         {
2847                 .cmd = TEAM_CMD_PORT_LIST_GET,
2848                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2849                 .doit = team_nl_cmd_port_list_get,
2850                 .flags = GENL_ADMIN_PERM,
2851         },
2852 };
2853
2854 static const struct genl_multicast_group team_nl_mcgrps[] = {
2855         { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2856 };
2857
2858 static struct genl_family team_nl_family __ro_after_init = {
2859         .name           = TEAM_GENL_NAME,
2860         .version        = TEAM_GENL_VERSION,
2861         .maxattr        = TEAM_ATTR_MAX,
2862         .policy = team_nl_policy,
2863         .netnsok        = true,
2864         .module         = THIS_MODULE,
2865         .small_ops      = team_nl_ops,
2866         .n_small_ops    = ARRAY_SIZE(team_nl_ops),
2867         .resv_start_op  = TEAM_CMD_PORT_LIST_GET + 1,
2868         .mcgrps         = team_nl_mcgrps,
2869         .n_mcgrps       = ARRAY_SIZE(team_nl_mcgrps),
2870 };
2871
2872 static int team_nl_send_multicast(struct sk_buff *skb,
2873                                   struct team *team, u32 portid)
2874 {
2875         return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2876                                        skb, 0, 0, GFP_KERNEL);
2877 }
2878
2879 static int team_nl_send_event_options_get(struct team *team,
2880                                           struct list_head *sel_opt_inst_list)
2881 {
2882         return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2883                                         sel_opt_inst_list);
2884 }
2885
2886 static int team_nl_send_event_port_get(struct team *team,
2887                                        struct team_port *port)
2888 {
2889         return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2890                                           port);
2891 }
2892
2893 static int __init team_nl_init(void)
2894 {
2895         return genl_register_family(&team_nl_family);
2896 }
2897
2898 static void team_nl_fini(void)
2899 {
2900         genl_unregister_family(&team_nl_family);
2901 }
2902
2903
2904 /******************
2905  * Change checkers
2906  ******************/
2907
2908 static void __team_options_change_check(struct team *team)
2909 {
2910         int err;
2911         struct team_option_inst *opt_inst;
2912         LIST_HEAD(sel_opt_inst_list);
2913
2914         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2915                 if (opt_inst->changed)
2916                         list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2917         }
2918         err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2919         if (err && err != -ESRCH)
2920                 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2921                             err);
2922 }
2923
2924 /* rtnl lock is held */
2925
2926 static void __team_port_change_send(struct team_port *port, bool linkup)
2927 {
2928         int err;
2929
2930         port->changed = true;
2931         port->state.linkup = linkup;
2932         team_refresh_port_linkup(port);
2933         if (linkup) {
2934                 struct ethtool_link_ksettings ecmd;
2935
2936                 err = __ethtool_get_link_ksettings(port->dev, &ecmd);
2937                 if (!err) {
2938                         port->state.speed = ecmd.base.speed;
2939                         port->state.duplex = ecmd.base.duplex;
2940                         goto send_event;
2941                 }
2942         }
2943         port->state.speed = 0;
2944         port->state.duplex = 0;
2945
2946 send_event:
2947         err = team_nl_send_event_port_get(port->team, port);
2948         if (err && err != -ESRCH)
2949                 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2950                             port->dev->name, err);
2951
2952 }
2953
2954 static void __team_carrier_check(struct team *team)
2955 {
2956         struct team_port *port;
2957         bool team_linkup;
2958
2959         if (team->user_carrier_enabled)
2960                 return;
2961
2962         team_linkup = false;
2963         list_for_each_entry(port, &team->port_list, list) {
2964                 if (port->linkup) {
2965                         team_linkup = true;
2966                         break;
2967                 }
2968         }
2969
2970         if (team_linkup)
2971                 netif_carrier_on(team->dev);
2972         else
2973                 netif_carrier_off(team->dev);
2974 }
2975
2976 static void __team_port_change_check(struct team_port *port, bool linkup)
2977 {
2978         if (port->state.linkup != linkup)
2979                 __team_port_change_send(port, linkup);
2980         __team_carrier_check(port->team);
2981 }
2982
2983 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2984 {
2985         __team_port_change_send(port, linkup);
2986         __team_carrier_check(port->team);
2987 }
2988
2989 static void __team_port_change_port_removed(struct team_port *port)
2990 {
2991         port->removed = true;
2992         __team_port_change_send(port, false);
2993         __team_carrier_check(port->team);
2994 }
2995
2996 static void team_port_change_check(struct team_port *port, bool linkup)
2997 {
2998         struct team *team = port->team;
2999
3000         mutex_lock(&team->lock);
3001         __team_port_change_check(port, linkup);
3002         mutex_unlock(&team->lock);
3003 }
3004
3005
3006 /************************************
3007  * Net device notifier event handler
3008  ************************************/
3009
3010 static int team_device_event(struct notifier_block *unused,
3011                              unsigned long event, void *ptr)
3012 {
3013         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
3014         struct team_port *port;
3015
3016         port = team_port_get_rtnl(dev);
3017         if (!port)
3018                 return NOTIFY_DONE;
3019
3020         switch (event) {
3021         case NETDEV_UP:
3022                 if (netif_oper_up(dev))
3023                         team_port_change_check(port, true);
3024                 break;
3025         case NETDEV_DOWN:
3026                 team_port_change_check(port, false);
3027                 break;
3028         case NETDEV_CHANGE:
3029                 if (netif_running(port->dev))
3030                         team_port_change_check(port,
3031                                                !!netif_oper_up(port->dev));
3032                 break;
3033         case NETDEV_UNREGISTER:
3034                 team_del_slave(port->team->dev, dev);
3035                 break;
3036         case NETDEV_FEAT_CHANGE:
3037                 if (!port->team->notifier_ctx) {
3038                         port->team->notifier_ctx = true;
3039                         team_compute_features(port->team);
3040                         port->team->notifier_ctx = false;
3041                 }
3042                 break;
3043         case NETDEV_PRECHANGEMTU:
3044                 /* Forbid to change mtu of underlaying device */
3045                 if (!port->team->port_mtu_change_allowed)
3046                         return NOTIFY_BAD;
3047                 break;
3048         case NETDEV_PRE_TYPE_CHANGE:
3049                 /* Forbid to change type of underlaying device */
3050                 return NOTIFY_BAD;
3051         case NETDEV_RESEND_IGMP:
3052                 /* Propagate to master device */
3053                 call_netdevice_notifiers(event, port->team->dev);
3054                 break;
3055         }
3056         return NOTIFY_DONE;
3057 }
3058
3059 static struct notifier_block team_notifier_block __read_mostly = {
3060         .notifier_call = team_device_event,
3061 };
3062
3063
3064 /***********************
3065  * Module init and exit
3066  ***********************/
3067
3068 static int __init team_module_init(void)
3069 {
3070         int err;
3071
3072         register_netdevice_notifier(&team_notifier_block);
3073
3074         err = rtnl_link_register(&team_link_ops);
3075         if (err)
3076                 goto err_rtnl_reg;
3077
3078         err = team_nl_init();
3079         if (err)
3080                 goto err_nl_init;
3081
3082         return 0;
3083
3084 err_nl_init:
3085         rtnl_link_unregister(&team_link_ops);
3086
3087 err_rtnl_reg:
3088         unregister_netdevice_notifier(&team_notifier_block);
3089
3090         return err;
3091 }
3092
3093 static void __exit team_module_exit(void)
3094 {
3095         team_nl_fini();
3096         rtnl_link_unregister(&team_link_ops);
3097         unregister_netdevice_notifier(&team_notifier_block);
3098 }
3099
3100 module_init(team_module_init);
3101 module_exit(team_module_exit);
3102
3103 MODULE_LICENSE("GPL v2");
3104 MODULE_AUTHOR("Jiri Pirko <[email protected]>");
3105 MODULE_DESCRIPTION("Ethernet team device driver");
3106 MODULE_ALIAS_RTNL_LINK(DRV_NAME);