drivers/net/team/team.c

   1 /*
   2  * drivers/net/team/team.c - Network team device driver
   3  * Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/types.h>
  13 #include <linux/module.h>
  14 #include <linux/init.h>
  15 #include <linux/slab.h>
  16 #include <linux/rcupdate.h>
  17 #include <linux/errno.h>
  18 #include <linux/ctype.h>
  19 #include <linux/notifier.h>
  20 #include <linux/netdevice.h>
  21 #include <linux/netpoll.h>
  22 #include <linux/if_vlan.h>
  23 #include <linux/if_arp.h>
  24 #include <linux/socket.h>
  25 #include <linux/etherdevice.h>
  26 #include <linux/rtnetlink.h>
  27 #include <net/rtnetlink.h>
  28 #include <net/genetlink.h>
  29 #include <net/netlink.h>
  30 #include <net/sch_generic.h>
  31 #include <net/switchdev.h>
  32 #include <generated/utsrelease.h>
  33 #include <linux/if_team.h>
  34
  35 #define DRV_NAME "team"
  36
  37
  38 /**********
  39  * Helpers
  40  **********/
  41
  42 #define team_port_exists(dev) (dev->priv_flags & IFF_TEAM_PORT)
  43
  44 static struct team_port *team_port_get_rcu(const struct net_device *dev)
  45 {
  46         return rcu_dereference(dev->rx_handler_data);
  47 }
  48
  49 static struct team_port *team_port_get_rtnl(const struct net_device *dev)
  50 {
  51         struct team_port *port = rtnl_dereference(dev->rx_handler_data);
  52
  53         return team_port_exists(dev) ? port : NULL;
  54 }
  55
  56 /*
  57  * Since the ability to change device address for open port device is tested in
  58  * team_port_add, this function can be called without control of return value
  59  */
  60 static int __set_port_dev_addr(struct net_device *port_dev,
  61                                const unsigned char *dev_addr)
  62 {
  63         struct sockaddr addr;
  64
  65         memcpy(addr.sa_data, dev_addr, port_dev->addr_len);
  66         addr.sa_family = port_dev->type;
  67         return dev_set_mac_address(port_dev, &addr);
  68 }
  69
  70 static int team_port_set_orig_dev_addr(struct team_port *port)
  71 {
  72         return __set_port_dev_addr(port->dev, port->orig.dev_addr);
  73 }
  74
  75 static int team_port_set_team_dev_addr(struct team *team,
  76                                        struct team_port *port)
  77 {
  78         return __set_port_dev_addr(port->dev, team->dev->dev_addr);
  79 }
  80
  81 int team_modeop_port_enter(struct team *team, struct team_port *port)
  82 {
  83         return team_port_set_team_dev_addr(team, port);
  84 }
  85 EXPORT_SYMBOL(team_modeop_port_enter);
  86
  87 void team_modeop_port_change_dev_addr(struct team *team,
  88                                       struct team_port *port)
  89 {
  90         team_port_set_team_dev_addr(team, port);
  91 }
  92 EXPORT_SYMBOL(team_modeop_port_change_dev_addr);
  93
  94 static void team_lower_state_changed(struct team_port *port)
  95 {
  96         struct netdev_lag_lower_state_info info;
  97
  98         info.link_up = port->linkup;
  99         info.tx_enabled = team_port_enabled(port);
 100         netdev_lower_state_changed(port->dev, &info);
 101 }
 102
 103 static void team_refresh_port_linkup(struct team_port *port)
 104 {
 105         bool new_linkup = port->user.linkup_enabled ? port->user.linkup :
 106                                                       port->state.linkup;
 107
 108         if (port->linkup != new_linkup) {
 109                 port->linkup = new_linkup;
 110                 team_lower_state_changed(port);
 111         }
 112 }
 113
 114
 115 /*******************
 116  * Options handling
 117  *******************/
 118
 119 struct team_option_inst { /* One for each option instance */
 120         struct list_head list;
 121         struct list_head tmp_list;
 122         struct team_option *option;
 123         struct team_option_inst_info info;
 124         bool changed;
 125         bool removed;
 126 };
 127
 128 static struct team_option *__team_find_option(struct team *team,
 129                                               const char *opt_name)
 130 {
 131         struct team_option *option;
 132
 133         list_for_each_entry(option, &team->option_list, list) {
 134                 if (strcmp(option->name, opt_name) == 0)
 135                         return option;
 136         }
 137         return NULL;
 138 }
 139
 140 static void __team_option_inst_del(struct team_option_inst *opt_inst)
 141 {
 142         list_del(&opt_inst->list);
 143         kfree(opt_inst);
 144 }
 145
 146 static void __team_option_inst_del_option(struct team *team,
 147                                           struct team_option *option)
 148 {
 149         struct team_option_inst *opt_inst, *tmp;
 150
 151         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 152                 if (opt_inst->option == option)
 153                         __team_option_inst_del(opt_inst);
 154         }
 155 }
 156
 157 static int __team_option_inst_add(struct team *team, struct team_option *option,
 158                                   struct team_port *port)
 159 {
 160         struct team_option_inst *opt_inst;
 161         unsigned int array_size;
 162         unsigned int i;
 163         int err;
 164
 165         array_size = option->array_size;
 166         if (!array_size)
 167                 array_size = 1; /* No array but still need one instance */
 168
 169         for (i = 0; i < array_size; i++) {
 170                 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL);
 171                 if (!opt_inst)
 172                         return -ENOMEM;
 173                 opt_inst->option = option;
 174                 opt_inst->info.port = port;
 175                 opt_inst->info.array_index = i;
 176                 opt_inst->changed = true;
 177                 opt_inst->removed = false;
 178                 list_add_tail(&opt_inst->list, &team->option_inst_list);
 179                 if (option->init) {
 180                         err = option->init(team, &opt_inst->info);
 181                         if (err)
 182                                 return err;
 183                 }
 184
 185         }
 186         return 0;
 187 }
 188
 189 static int __team_option_inst_add_option(struct team *team,
 190                                          struct team_option *option)
 191 {
 192         int err;
 193
 194         if (!option->per_port) {
 195                 err = __team_option_inst_add(team, option, NULL);
 196                 if (err)
 197                         goto inst_del_option;
 198         }
 199         return 0;
 200
 201 inst_del_option:
 202         __team_option_inst_del_option(team, option);
 203         return err;
 204 }
 205
 206 static void __team_option_inst_mark_removed_option(struct team *team,
 207                                                    struct team_option *option)
 208 {
 209         struct team_option_inst *opt_inst;
 210
 211         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 212                 if (opt_inst->option == option) {
 213                         opt_inst->changed = true;
 214                         opt_inst->removed = true;
 215                 }
 216         }
 217 }
 218
 219 static void __team_option_inst_del_port(struct team *team,
 220                                         struct team_port *port)
 221 {
 222         struct team_option_inst *opt_inst, *tmp;
 223
 224         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 225                 if (opt_inst->option->per_port &&
 226                     opt_inst->info.port == port)
 227                         __team_option_inst_del(opt_inst);
 228         }
 229 }
 230
 231 static int __team_option_inst_add_port(struct team *team,
 232                                        struct team_port *port)
 233 {
 234         struct team_option *option;
 235         int err;
 236
 237         list_for_each_entry(option, &team->option_list, list) {
 238                 if (!option->per_port)
 239                         continue;
 240                 err = __team_option_inst_add(team, option, port);
 241                 if (err)
 242                         goto inst_del_port;
 243         }
 244         return 0;
 245
 246 inst_del_port:
 247         __team_option_inst_del_port(team, port);
 248         return err;
 249 }
 250
 251 static void __team_option_inst_mark_removed_port(struct team *team,
 252                                                  struct team_port *port)
 253 {
 254         struct team_option_inst *opt_inst;
 255
 256         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 257                 if (opt_inst->info.port == port) {
 258                         opt_inst->changed = true;
 259                         opt_inst->removed = true;
 260                 }
 261         }
 262 }
 263
 264 static int __team_options_register(struct team *team,
 265                                    const struct team_option *option,
 266                                    size_t option_count)
 267 {
 268         int i;
 269         struct team_option **dst_opts;
 270         int err;
 271
 272         dst_opts = kzalloc(sizeof(struct team_option *) * option_count,
 273                            GFP_KERNEL);
 274         if (!dst_opts)
 275                 return -ENOMEM;
 276         for (i = 0; i < option_count; i++, option++) {
 277                 if (__team_find_option(team, option->name)) {
 278                         err = -EEXIST;
 279                         goto alloc_rollback;
 280                 }
 281                 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
 282                 if (!dst_opts[i]) {
 283                         err = -ENOMEM;
 284                         goto alloc_rollback;
 285                 }
 286         }
 287
 288         for (i = 0; i < option_count; i++) {
 289                 err = __team_option_inst_add_option(team, dst_opts[i]);
 290                 if (err)
 291                         goto inst_rollback;
 292                 list_add_tail(&dst_opts[i]->list, &team->option_list);
 293         }
 294
 295         kfree(dst_opts);
 296         return 0;
 297
 298 inst_rollback:
 299         for (i--; i >= 0; i--)
 300                 __team_option_inst_del_option(team, dst_opts[i]);
 301
 302         i = option_count;
 303 alloc_rollback:
 304         for (i--; i >= 0; i--)
 305                 kfree(dst_opts[i]);
 306
 307         kfree(dst_opts);
 308         return err;
 309 }
 310
 311 static void __team_options_mark_removed(struct team *team,
 312                                         const struct team_option *option,
 313                                         size_t option_count)
 314 {
 315         int i;
 316
 317         for (i = 0; i < option_count; i++, option++) {
 318                 struct team_option *del_opt;
 319
 320                 del_opt = __team_find_option(team, option->name);
 321                 if (del_opt)
 322                         __team_option_inst_mark_removed_option(team, del_opt);
 323         }
 324 }
 325
 326 static void __team_options_unregister(struct team *team,
 327                                       const struct team_option *option,
 328                                       size_t option_count)
 329 {
 330         int i;
 331
 332         for (i = 0; i < option_count; i++, option++) {
 333                 struct team_option *del_opt;
 334
 335                 del_opt = __team_find_option(team, option->name);
 336                 if (del_opt) {
 337                         __team_option_inst_del_option(team, del_opt);
 338                         list_del(&del_opt->list);
 339                         kfree(del_opt);
 340                 }
 341         }
 342 }
 343
 344 static void __team_options_change_check(struct team *team);
 345
 346 int team_options_register(struct team *team,
 347                           const struct team_option *option,
 348                           size_t option_count)
 349 {
 350         int err;
 351
 352         err = __team_options_register(team, option, option_count);
 353         if (err)
 354                 return err;
 355         __team_options_change_check(team);
 356         return 0;
 357 }
 358 EXPORT_SYMBOL(team_options_register);
 359
 360 void team_options_unregister(struct team *team,
 361                              const struct team_option *option,
 362                              size_t option_count)
 363 {
 364         __team_options_mark_removed(team, option, option_count);
 365         __team_options_change_check(team);
 366         __team_options_unregister(team, option, option_count);
 367 }
 368 EXPORT_SYMBOL(team_options_unregister);
 369
 370 static int team_option_get(struct team *team,
 371                            struct team_option_inst *opt_inst,
 372                            struct team_gsetter_ctx *ctx)
 373 {
 374         if (!opt_inst->option->getter)
 375                 return -EOPNOTSUPP;
 376         return opt_inst->option->getter(team, ctx);
 377 }
 378
 379 static int team_option_set(struct team *team,
 380                            struct team_option_inst *opt_inst,
 381                            struct team_gsetter_ctx *ctx)
 382 {
 383         if (!opt_inst->option->setter)
 384                 return -EOPNOTSUPP;
 385         return opt_inst->option->setter(team, ctx);
 386 }
 387
 388 void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info)
 389 {
 390         struct team_option_inst *opt_inst;
 391
 392         opt_inst = container_of(opt_inst_info, struct team_option_inst, info);
 393         opt_inst->changed = true;
 394 }
 395 EXPORT_SYMBOL(team_option_inst_set_change);
 396
 397 void team_options_change_check(struct team *team)
 398 {
 399         __team_options_change_check(team);
 400 }
 401 EXPORT_SYMBOL(team_options_change_check);
 402
 403
 404 /****************
 405  * Mode handling
 406  ****************/
 407
 408 static LIST_HEAD(mode_list);
 409 static DEFINE_SPINLOCK(mode_list_lock);
 410
 411 struct team_mode_item {
 412         struct list_head list;
 413         const struct team_mode *mode;
 414 };
 415
 416 static struct team_mode_item *__find_mode(const char *kind)
 417 {
 418         struct team_mode_item *mitem;
 419
 420         list_for_each_entry(mitem, &mode_list, list) {
 421                 if (strcmp(mitem->mode->kind, kind) == 0)
 422                         return mitem;
 423         }
 424         return NULL;
 425 }
 426
 427 static bool is_good_mode_name(const char *name)
 428 {
 429         while (*name != '\0') {
 430                 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
 431                         return false;
 432                 name++;
 433         }
 434         return true;
 435 }
 436
 437 int team_mode_register(const struct team_mode *mode)
 438 {
 439         int err = 0;
 440         struct team_mode_item *mitem;
 441
 442         if (!is_good_mode_name(mode->kind) ||
 443             mode->priv_size > TEAM_MODE_PRIV_SIZE)
 444                 return -EINVAL;
 445
 446         mitem = kmalloc(sizeof(*mitem), GFP_KERNEL);
 447         if (!mitem)
 448                 return -ENOMEM;
 449
 450         spin_lock(&mode_list_lock);
 451         if (__find_mode(mode->kind)) {
 452                 err = -EEXIST;
 453                 kfree(mitem);
 454                 goto unlock;
 455         }
 456         mitem->mode = mode;
 457         list_add_tail(&mitem->list, &mode_list);
 458 unlock:
 459         spin_unlock(&mode_list_lock);
 460         return err;
 461 }
 462 EXPORT_SYMBOL(team_mode_register);
 463
 464 void team_mode_unregister(const struct team_mode *mode)
 465 {
 466         struct team_mode_item *mitem;
 467
 468         spin_lock(&mode_list_lock);
 469         mitem = __find_mode(mode->kind);
 470         if (mitem) {
 471                 list_del_init(&mitem->list);
 472                 kfree(mitem);
 473         }
 474         spin_unlock(&mode_list_lock);
 475 }
 476 EXPORT_SYMBOL(team_mode_unregister);
 477
 478 static const struct team_mode *team_mode_get(const char *kind)
 479 {
 480         struct team_mode_item *mitem;
 481         const struct team_mode *mode = NULL;
 482
 483         if (!try_module_get(THIS_MODULE))
 484                 return NULL;
 485
 486         spin_lock(&mode_list_lock);
 487         mitem = __find_mode(kind);
 488         if (!mitem) {
 489                 spin_unlock(&mode_list_lock);
 490                 request_module("team-mode-%s", kind);
 491                 spin_lock(&mode_list_lock);
 492                 mitem = __find_mode(kind);
 493         }
 494         if (mitem) {
 495                 mode = mitem->mode;
 496                 if (!try_module_get(mode->owner))
 497                         mode = NULL;
 498         }
 499
 500         spin_unlock(&mode_list_lock);
 501         module_put(THIS_MODULE);
 502         return mode;
 503 }
 504
 505 static void team_mode_put(const struct team_mode *mode)
 506 {
 507         module_put(mode->owner);
 508 }
 509
 510 static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
 511 {
 512         dev_kfree_skb_any(skb);
 513         return false;
 514 }
 515
 516 static rx_handler_result_t team_dummy_receive(struct team *team,
 517                                               struct team_port *port,
 518                                               struct sk_buff *skb)
 519 {
 520         return RX_HANDLER_ANOTHER;
 521 }
 522
 523 static const struct team_mode __team_no_mode = {
 524         .kind           = "*NOMODE*",
 525 };
 526
 527 static bool team_is_mode_set(struct team *team)
 528 {
 529         return team->mode != &__team_no_mode;
 530 }
 531
 532 static void team_set_no_mode(struct team *team)
 533 {
 534         team->user_carrier_enabled = false;
 535         team->mode = &__team_no_mode;
 536 }
 537
 538 static void team_adjust_ops(struct team *team)
 539 {
 540         /*
 541          * To avoid checks in rx/tx skb paths, ensure here that non-null and
 542          * correct ops are always set.
 543          */
 544
 545         if (!team->en_port_count || !team_is_mode_set(team) ||
 546             !team->mode->ops->transmit)
 547                 team->ops.transmit = team_dummy_transmit;
 548         else
 549                 team->ops.transmit = team->mode->ops->transmit;
 550
 551         if (!team->en_port_count || !team_is_mode_set(team) ||
 552             !team->mode->ops->receive)
 553                 team->ops.receive = team_dummy_receive;
 554         else
 555                 team->ops.receive = team->mode->ops->receive;
 556 }
 557
 558 /*
 559  * We can benefit from the fact that it's ensured no port is present
 560  * at the time of mode change. Therefore no packets are in fly so there's no
 561  * need to set mode operations in any special way.
 562  */
 563 static int __team_change_mode(struct team *team,
 564                               const struct team_mode *new_mode)
 565 {
 566         /* Check if mode was previously set and do cleanup if so */
 567         if (team_is_mode_set(team)) {
 568                 void (*exit_op)(struct team *team) = team->ops.exit;
 569
 570                 /* Clear ops area so no callback is called any longer */
 571                 memset(&team->ops, 0, sizeof(struct team_mode_ops));
 572                 team_adjust_ops(team);
 573
 574                 if (exit_op)
 575                         exit_op(team);
 576                 team_mode_put(team->mode);
 577                 team_set_no_mode(team);
 578                 /* zero private data area */
 579                 memset(&team->mode_priv, 0,
 580                        sizeof(struct team) - offsetof(struct team, mode_priv));
 581         }
 582
 583         if (!new_mode)
 584                 return 0;
 585
 586         if (new_mode->ops->init) {
 587                 int err;
 588
 589                 err = new_mode->ops->init(team);
 590                 if (err)
 591                         return err;
 592         }
 593
 594         team->mode = new_mode;
 595         memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
 596         team_adjust_ops(team);
 597
 598         return 0;
 599 }
 600
 601 static int team_change_mode(struct team *team, const char *kind)
 602 {
 603         const struct team_mode *new_mode;
 604         struct net_device *dev = team->dev;
 605         int err;
 606
 607         if (!list_empty(&team->port_list)) {
 608                 netdev_err(dev, "No ports can be present during mode change\n");
 609                 return -EBUSY;
 610         }
 611
 612         if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) {
 613                 netdev_err(dev, "Unable to change to the same mode the team is in\n");
 614                 return -EINVAL;
 615         }
 616
 617         new_mode = team_mode_get(kind);
 618         if (!new_mode) {
 619                 netdev_err(dev, "Mode \"%s\" not found\n", kind);
 620                 return -EINVAL;
 621         }
 622
 623         err = __team_change_mode(team, new_mode);
 624         if (err) {
 625                 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
 626                 team_mode_put(new_mode);
 627                 return err;
 628         }
 629
 630         netdev_info(dev, "Mode changed to \"%s\"\n", kind);
 631         return 0;
 632 }
 633
 634
 635 /*********************
 636  * Peers notification
 637  *********************/
 638
 639 static void team_notify_peers_work(struct work_struct *work)
 640 {
 641         struct team *team;
 642         int val;
 643
 644         team = container_of(work, struct team, notify_peers.dw.work);
 645
 646         if (!rtnl_trylock()) {
 647                 schedule_delayed_work(&team->notify_peers.dw, 0);
 648                 return;
 649         }
 650         val = atomic_dec_if_positive(&team->notify_peers.count_pending);
 651         if (val < 0) {
 652                 rtnl_unlock();
 653                 return;
 654         }
 655         call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, team->dev);
 656         rtnl_unlock();
 657         if (val)
 658                 schedule_delayed_work(&team->notify_peers.dw,
 659                                       msecs_to_jiffies(team->notify_peers.interval));
 660 }
 661
 662 static void team_notify_peers(struct team *team)
 663 {
 664         if (!team->notify_peers.count || !netif_running(team->dev))
 665                 return;
 666         atomic_add(team->notify_peers.count, &team->notify_peers.count_pending);
 667         schedule_delayed_work(&team->notify_peers.dw, 0);
 668 }
 669
 670 static void team_notify_peers_init(struct team *team)
 671 {
 672         INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work);
 673 }
 674
 675 static void team_notify_peers_fini(struct team *team)
 676 {
 677         cancel_delayed_work_sync(&team->notify_peers.dw);
 678 }
 679
 680
 681 /*******************************
 682  * Send multicast group rejoins
 683  *******************************/
 684
 685 static void team_mcast_rejoin_work(struct work_struct *work)
 686 {
 687         struct team *team;
 688         int val;
 689
 690         team = container_of(work, struct team, mcast_rejoin.dw.work);
 691
 692         if (!rtnl_trylock()) {
 693                 schedule_delayed_work(&team->mcast_rejoin.dw, 0);
 694                 return;
 695         }
 696         val = atomic_dec_if_positive(&team->mcast_rejoin.count_pending);
 697         if (val < 0) {
 698                 rtnl_unlock();
 699                 return;
 700         }
 701         call_netdevice_notifiers(NETDEV_RESEND_IGMP, team->dev);
 702         rtnl_unlock();
 703         if (val)
 704                 schedule_delayed_work(&team->mcast_rejoin.dw,
 705                                       msecs_to_jiffies(team->mcast_rejoin.interval));
 706 }
 707
 708 static void team_mcast_rejoin(struct team *team)
 709 {
 710         if (!team->mcast_rejoin.count || !netif_running(team->dev))
 711                 return;
 712         atomic_add(team->mcast_rejoin.count, &team->mcast_rejoin.count_pending);
 713         schedule_delayed_work(&team->mcast_rejoin.dw, 0);
 714 }
 715
 716 static void team_mcast_rejoin_init(struct team *team)
 717 {
 718         INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work);
 719 }
 720
 721 static void team_mcast_rejoin_fini(struct team *team)
 722 {
 723         cancel_delayed_work_sync(&team->mcast_rejoin.dw);
 724 }
 725
 726
 727 /************************
 728  * Rx path frame handler
 729  ************************/
 730
 731 /* note: already called with rcu_read_lock */
 732 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
 733 {
 734         struct sk_buff *skb = *pskb;
 735         struct team_port *port;
 736         struct team *team;
 737         rx_handler_result_t res;
 738
 739         skb = skb_share_check(skb, GFP_ATOMIC);
 740         if (!skb)
 741                 return RX_HANDLER_CONSUMED;
 742
 743         *pskb = skb;
 744
 745         port = team_port_get_rcu(skb->dev);
 746         team = port->team;
 747         if (!team_port_enabled(port)) {
 748                 /* allow exact match delivery for disabled ports */
 749                 res = RX_HANDLER_EXACT;
 750         } else {
 751                 res = team->ops.receive(team, port, skb);
 752         }
 753         if (res == RX_HANDLER_ANOTHER) {
 754                 struct team_pcpu_stats *pcpu_stats;
 755
 756                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
 757                 u64_stats_update_begin(&pcpu_stats->syncp);
 758                 pcpu_stats->rx_packets++;
 759                 pcpu_stats->rx_bytes += skb->len;
 760                 if (skb->pkt_type == PACKET_MULTICAST)
 761                         pcpu_stats->rx_multicast++;
 762                 u64_stats_update_end(&pcpu_stats->syncp);
 763
 764                 skb->dev = team->dev;
 765         } else if (res == RX_HANDLER_EXACT) {
 766                 this_cpu_inc(team->pcpu_stats->rx_nohandler);
 767         } else {
 768                 this_cpu_inc(team->pcpu_stats->rx_dropped);
 769         }
 770
 771         return res;
 772 }
 773
 774
 775 /*************************************
 776  * Multiqueue Tx port select override
 777  *************************************/
 778
 779 static int team_queue_override_init(struct team *team)
 780 {
 781         struct list_head *listarr;
 782         unsigned int queue_cnt = team->dev->num_tx_queues - 1;
 783         unsigned int i;
 784
 785         if (!queue_cnt)
 786                 return 0;
 787         listarr = kmalloc(sizeof(struct list_head) * queue_cnt, GFP_KERNEL);
 788         if (!listarr)
 789                 return -ENOMEM;
 790         team->qom_lists = listarr;
 791         for (i = 0; i < queue_cnt; i++)
 792                 INIT_LIST_HEAD(listarr++);
 793         return 0;
 794 }
 795
 796 static void team_queue_override_fini(struct team *team)
 797 {
 798         kfree(team->qom_lists);
 799 }
 800
 801 static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
 802 {
 803         return &team->qom_lists[queue_id - 1];
 804 }
 805
 806 /*
 807  * note: already called with rcu_read_lock
 808  */
 809 static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
 810 {
 811         struct list_head *qom_list;
 812         struct team_port *port;
 813
 814         if (!team->queue_override_enabled || !skb->queue_mapping)
 815                 return false;
 816         qom_list = __team_get_qom_list(team, skb->queue_mapping);
 817         list_for_each_entry_rcu(port, qom_list, qom_list) {
 818                 if (!team_dev_queue_xmit(team, port, skb))
 819                         return true;
 820         }
 821         return false;
 822 }
 823
 824 static void __team_queue_override_port_del(struct team *team,
 825                                            struct team_port *port)
 826 {
 827         if (!port->queue_id)
 828                 return;
 829         list_del_rcu(&port->qom_list);
 830 }
 831
 832 static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
 833                                                       struct team_port *cur)
 834 {
 835         if (port->priority < cur->priority)
 836                 return true;
 837         if (port->priority > cur->priority)
 838                 return false;
 839         if (port->index < cur->index)
 840                 return true;
 841         return false;
 842 }
 843
 844 static void __team_queue_override_port_add(struct team *team,
 845                                            struct team_port *port)
 846 {
 847         struct team_port *cur;
 848         struct list_head *qom_list;
 849         struct list_head *node;
 850
 851         if (!port->queue_id)
 852                 return;
 853         qom_list = __team_get_qom_list(team, port->queue_id);
 854         node = qom_list;
 855         list_for_each_entry(cur, qom_list, qom_list) {
 856                 if (team_queue_override_port_has_gt_prio_than(port, cur))
 857                         break;
 858                 node = &cur->qom_list;
 859         }
 860         list_add_tail_rcu(&port->qom_list, node);
 861 }
 862
 863 static void __team_queue_override_enabled_check(struct team *team)
 864 {
 865         struct team_port *port;
 866         bool enabled = false;
 867
 868         list_for_each_entry(port, &team->port_list, list) {
 869                 if (port->queue_id) {
 870                         enabled = true;
 871                         break;
 872                 }
 873         }
 874         if (enabled == team->queue_override_enabled)
 875                 return;
 876         netdev_dbg(team->dev, "%s queue override\n",
 877                    enabled ? "Enabling" : "Disabling");
 878         team->queue_override_enabled = enabled;
 879 }
 880
 881 static void team_queue_override_port_prio_changed(struct team *team,
 882                                                   struct team_port *port)
 883 {
 884         if (!port->queue_id || team_port_enabled(port))
 885                 return;
 886         __team_queue_override_port_del(team, port);
 887         __team_queue_override_port_add(team, port);
 888         __team_queue_override_enabled_check(team);
 889 }
 890
 891 static void team_queue_override_port_change_queue_id(struct team *team,
 892                                                      struct team_port *port,
 893                                                      u16 new_queue_id)
 894 {
 895         if (team_port_enabled(port)) {
 896                 __team_queue_override_port_del(team, port);
 897                 port->queue_id = new_queue_id;
 898                 __team_queue_override_port_add(team, port);
 899                 __team_queue_override_enabled_check(team);
 900         } else {
 901                 port->queue_id = new_queue_id;
 902         }
 903 }
 904
 905 static void team_queue_override_port_add(struct team *team,
 906                                          struct team_port *port)
 907 {
 908         __team_queue_override_port_add(team, port);
 909         __team_queue_override_enabled_check(team);
 910 }
 911
 912 static void team_queue_override_port_del(struct team *team,
 913                                          struct team_port *port)
 914 {
 915         __team_queue_override_port_del(team, port);
 916         __team_queue_override_enabled_check(team);
 917 }
 918
 919
 920 /****************
 921  * Port handling
 922  ****************/
 923
 924 static bool team_port_find(const struct team *team,
 925                            const struct team_port *port)
 926 {
 927         struct team_port *cur;
 928
 929         list_for_each_entry(cur, &team->port_list, list)
 930                 if (cur == port)
 931                         return true;
 932         return false;
 933 }
 934
 935 /*
 936  * Enable/disable port by adding to enabled port hashlist and setting
 937  * port->index (Might be racy so reader could see incorrect ifindex when
 938  * processing a flying packet, but that is not a problem). Write guarded
 939  * by team->lock.
 940  */
 941 static void team_port_enable(struct team *team,
 942                              struct team_port *port)
 943 {
 944         if (team_port_enabled(port))
 945                 return;
 946         port->index = team->en_port_count++;
 947         hlist_add_head_rcu(&port->hlist,
 948                            team_port_index_hash(team, port->index));
 949         team_adjust_ops(team);
 950         team_queue_override_port_add(team, port);
 951         if (team->ops.port_enabled)
 952                 team->ops.port_enabled(team, port);
 953         team_notify_peers(team);
 954         team_mcast_rejoin(team);
 955         team_lower_state_changed(port);
 956 }
 957
 958 static void __reconstruct_port_hlist(struct team *team, int rm_index)
 959 {
 960         int i;
 961         struct team_port *port;
 962
 963         for (i = rm_index + 1; i < team->en_port_count; i++) {
 964                 port = team_get_port_by_index(team, i);
 965                 hlist_del_rcu(&port->hlist);
 966                 port->index--;
 967                 hlist_add_head_rcu(&port->hlist,
 968                                    team_port_index_hash(team, port->index));
 969         }
 970 }
 971
 972 static void team_port_disable(struct team *team,
 973                               struct team_port *port)
 974 {
 975         if (!team_port_enabled(port))
 976                 return;
 977         if (team->ops.port_disabled)
 978                 team->ops.port_disabled(team, port);
 979         hlist_del_rcu(&port->hlist);
 980         __reconstruct_port_hlist(team, port->index);
 981         port->index = -1;
 982         team->en_port_count--;
 983         team_queue_override_port_del(team, port);
 984         team_adjust_ops(team);
 985         team_lower_state_changed(port);
 986 }
 987
 988 #define TEAM_VLAN_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
 989                             NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
 990                             NETIF_F_HIGHDMA | NETIF_F_LRO)
 991
 992 #define TEAM_ENC_FEATURES       (NETIF_F_HW_CSUM | NETIF_F_SG | \
 993                                  NETIF_F_RXCSUM | NETIF_F_ALL_TSO)
 994
 995 static void ___team_compute_features(struct team *team)
 996 {
 997         struct team_port *port;
 998         netdev_features_t vlan_features = TEAM_VLAN_FEATURES &
 999                                           NETIF_F_ALL_FOR_ALL;
1000         netdev_features_t enc_features  = TEAM_ENC_FEATURES;
1001         unsigned short max_hard_header_len = ETH_HLEN;
1002         unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE |
1003                                         IFF_XMIT_DST_RELEASE_PERM;
1004
1005         list_for_each_entry(port, &team->port_list, list) {
1006                 vlan_features = netdev_increment_features(vlan_features,
1007                                         port->dev->vlan_features,
1008                                         TEAM_VLAN_FEATURES);
1009                 enc_features =
1010                         netdev_increment_features(enc_features,
1011                                                   port->dev->hw_enc_features,
1012                                                   TEAM_ENC_FEATURES);
1013
1014
1015                 dst_release_flag &= port->dev->priv_flags;
1016                 if (port->dev->hard_header_len > max_hard_header_len)
1017                         max_hard_header_len = port->dev->hard_header_len;
1018         }
1019
1020         team->dev->vlan_features = vlan_features;
1021         team->dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL |
1022                                      NETIF_F_HW_VLAN_CTAG_TX |
1023                                      NETIF_F_HW_VLAN_STAG_TX;
1024         team->dev->hard_header_len = max_hard_header_len;
1025
1026         team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
1027         if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
1028                 team->dev->priv_flags |= IFF_XMIT_DST_RELEASE;
1029 }
1030
1031 static void __team_compute_features(struct team *team)
1032 {
1033         ___team_compute_features(team);
1034         netdev_change_features(team->dev);
1035 }
1036
1037 static void team_compute_features(struct team *team)
1038 {
1039         mutex_lock(&team->lock);
1040         ___team_compute_features(team);
1041         mutex_unlock(&team->lock);
1042         netdev_change_features(team->dev);
1043 }
1044
1045 static int team_port_enter(struct team *team, struct team_port *port)
1046 {
1047         int err = 0;
1048
1049         dev_hold(team->dev);
1050         if (team->ops.port_enter) {
1051                 err = team->ops.port_enter(team, port);
1052                 if (err) {
1053                         netdev_err(team->dev, "Device %s failed to enter team mode\n",
1054                                    port->dev->name);
1055                         goto err_port_enter;
1056                 }
1057         }
1058
1059         return 0;
1060
1061 err_port_enter:
1062         dev_put(team->dev);
1063
1064         return err;
1065 }
1066
1067 static void team_port_leave(struct team *team, struct team_port *port)
1068 {
1069         if (team->ops.port_leave)
1070                 team->ops.port_leave(team, port);
1071         dev_put(team->dev);
1072 }
1073
1074 #ifdef CONFIG_NET_POLL_CONTROLLER
1075 static int __team_port_enable_netpoll(struct team_port *port)
1076 {
1077         struct netpoll *np;
1078         int err;
1079
1080         np = kzalloc(sizeof(*np), GFP_KERNEL);
1081         if (!np)
1082                 return -ENOMEM;
1083
1084         err = __netpoll_setup(np, port->dev);
1085         if (err) {
1086                 kfree(np);
1087                 return err;
1088         }
1089         port->np = np;
1090         return err;
1091 }
1092
1093 static int team_port_enable_netpoll(struct team_port *port)
1094 {
1095         if (!port->team->dev->npinfo)
1096                 return 0;
1097
1098         return __team_port_enable_netpoll(port);
1099 }
1100
1101 static void team_port_disable_netpoll(struct team_port *port)
1102 {
1103         struct netpoll *np = port->np;
1104
1105         if (!np)
1106                 return;
1107         port->np = NULL;
1108
1109         /* Wait for transmitting packets to finish before freeing. */
1110         synchronize_rcu_bh();
1111         __netpoll_cleanup(np);
1112         kfree(np);
1113 }
1114 #else
1115 static int team_port_enable_netpoll(struct team_port *port)
1116 {
1117         return 0;
1118 }
1119 static void team_port_disable_netpoll(struct team_port *port)
1120 {
1121 }
1122 #endif
1123
1124 static int team_upper_dev_link(struct team *team, struct team_port *port)
1125 {
1126         struct netdev_lag_upper_info lag_upper_info;
1127         int err;
1128
1129         lag_upper_info.tx_type = team->mode->lag_tx_type;
1130         err = netdev_master_upper_dev_link(port->dev, team->dev, NULL,
1131                                            &lag_upper_info);
1132         if (err)
1133                 return err;
1134         port->dev->priv_flags |= IFF_TEAM_PORT;
1135         return 0;
1136 }
1137
1138 static void team_upper_dev_unlink(struct team *team, struct team_port *port)
1139 {
1140         netdev_upper_dev_unlink(port->dev, team->dev);
1141         port->dev->priv_flags &= ~IFF_TEAM_PORT;
1142 }
1143
1144 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1145 static int team_dev_type_check_change(struct net_device *dev,
1146                                       struct net_device *port_dev);
1147
1148 static int team_port_add(struct team *team, struct net_device *port_dev)
1149 {
1150         struct net_device *dev = team->dev;
1151         struct team_port *port;
1152         char *portname = port_dev->name;
1153         int err;
1154
1155         if (port_dev->flags & IFF_LOOPBACK) {
1156                 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1157                            portname);
1158                 return -EINVAL;
1159         }
1160
1161         if (team_port_exists(port_dev)) {
1162                 netdev_err(dev, "Device %s is already a port "
1163                                 "of a team device\n", portname);
1164                 return -EBUSY;
1165         }
1166
1167         if (dev == port_dev) {
1168                 netdev_err(dev, "Cannot enslave team device to itself\n");
1169                 return -EINVAL;
1170         }
1171
1172         if (netdev_has_upper_dev(dev, port_dev)) {
1173                 netdev_err(dev, "Device %s is already an upper device of the team interface\n",
1174                            portname);
1175                 return -EBUSY;
1176         }
1177
1178         if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1179             vlan_uses_dev(dev)) {
1180                 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1181                            portname);
1182                 return -EPERM;
1183         }
1184
1185         err = team_dev_type_check_change(dev, port_dev);
1186         if (err)
1187                 return err;
1188
1189         if (port_dev->flags & IFF_UP) {
1190                 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1191                            portname);
1192                 return -EBUSY;
1193         }
1194
1195         port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1196                        GFP_KERNEL);
1197         if (!port)
1198                 return -ENOMEM;
1199
1200         port->dev = port_dev;
1201         port->team = team;
1202         INIT_LIST_HEAD(&port->qom_list);
1203
1204         port->orig.mtu = port_dev->mtu;
1205         err = dev_set_mtu(port_dev, dev->mtu);
1206         if (err) {
1207                 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1208                 goto err_set_mtu;
1209         }
1210
1211         memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1212
1213         err = team_port_enter(team, port);
1214         if (err) {
1215                 netdev_err(dev, "Device %s failed to enter team mode\n",
1216                            portname);
1217                 goto err_port_enter;
1218         }
1219
1220         err = dev_open(port_dev);
1221         if (err) {
1222                 netdev_dbg(dev, "Device %s opening failed\n",
1223                            portname);
1224                 goto err_dev_open;
1225         }
1226
1227         err = vlan_vids_add_by_dev(port_dev, dev);
1228         if (err) {
1229                 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1230                                 portname);
1231                 goto err_vids_add;
1232         }
1233
1234         err = team_port_enable_netpoll(port);
1235         if (err) {
1236                 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1237                            portname);
1238                 goto err_enable_netpoll;
1239         }
1240
1241         if (!(dev->features & NETIF_F_LRO))
1242                 dev_disable_lro(port_dev);
1243
1244         err = netdev_rx_handler_register(port_dev, team_handle_frame,
1245                                          port);
1246         if (err) {
1247                 netdev_err(dev, "Device %s failed to register rx_handler\n",
1248                            portname);
1249                 goto err_handler_register;
1250         }
1251
1252         err = team_upper_dev_link(team, port);
1253         if (err) {
1254                 netdev_err(dev, "Device %s failed to set upper link\n",
1255                            portname);
1256                 goto err_set_upper_link;
1257         }
1258
1259         err = __team_option_inst_add_port(team, port);
1260         if (err) {
1261                 netdev_err(dev, "Device %s failed to add per-port options\n",
1262                            portname);
1263                 goto err_option_port_add;
1264         }
1265
1266         /* set promiscuity level to new slave */
1267         if (dev->flags & IFF_PROMISC) {
1268                 err = dev_set_promiscuity(port_dev, 1);
1269                 if (err)
1270                         goto err_set_slave_promisc;
1271         }
1272
1273         /* set allmulti level to new slave */
1274         if (dev->flags & IFF_ALLMULTI) {
1275                 err = dev_set_allmulti(port_dev, 1);
1276                 if (err) {
1277                         if (dev->flags & IFF_PROMISC)
1278                                 dev_set_promiscuity(port_dev, -1);
1279                         goto err_set_slave_promisc;
1280                 }
1281         }
1282
1283         if (dev->flags & IFF_UP) {
1284                 netif_addr_lock_bh(dev);
1285                 dev_uc_sync_multiple(port_dev, dev);
1286                 dev_mc_sync_multiple(port_dev, dev);
1287                 netif_addr_unlock_bh(dev);
1288         }
1289
1290         port->index = -1;
1291         list_add_tail_rcu(&port->list, &team->port_list);
1292         team_port_enable(team, port);
1293         __team_compute_features(team);
1294         __team_port_change_port_added(port, !!netif_carrier_ok(port_dev));
1295         __team_options_change_check(team);
1296
1297         netdev_info(dev, "Port device %s added\n", portname);
1298
1299         return 0;
1300
1301 err_set_slave_promisc:
1302         __team_option_inst_del_port(team, port);
1303
1304 err_option_port_add:
1305         team_upper_dev_unlink(team, port);
1306
1307 err_set_upper_link:
1308         netdev_rx_handler_unregister(port_dev);
1309
1310 err_handler_register:
1311         team_port_disable_netpoll(port);
1312
1313 err_enable_netpoll:
1314         vlan_vids_del_by_dev(port_dev, dev);
1315
1316 err_vids_add:
1317         dev_close(port_dev);
1318
1319 err_dev_open:
1320         team_port_leave(team, port);
1321         team_port_set_orig_dev_addr(port);
1322
1323 err_port_enter:
1324         dev_set_mtu(port_dev, port->orig.mtu);
1325
1326 err_set_mtu:
1327         kfree(port);
1328
1329         return err;
1330 }
1331
1332 static void __team_port_change_port_removed(struct team_port *port);
1333
1334 static int team_port_del(struct team *team, struct net_device *port_dev)
1335 {
1336         struct net_device *dev = team->dev;
1337         struct team_port *port;
1338         char *portname = port_dev->name;
1339
1340         port = team_port_get_rtnl(port_dev);
1341         if (!port || !team_port_find(team, port)) {
1342                 netdev_err(dev, "Device %s does not act as a port of this team\n",
1343                            portname);
1344                 return -ENOENT;
1345         }
1346
1347         team_port_disable(team, port);
1348         list_del_rcu(&port->list);
1349
1350         if (dev->flags & IFF_PROMISC)
1351                 dev_set_promiscuity(port_dev, -1);
1352         if (dev->flags & IFF_ALLMULTI)
1353                 dev_set_allmulti(port_dev, -1);
1354
1355         team_upper_dev_unlink(team, port);
1356         netdev_rx_handler_unregister(port_dev);
1357         team_port_disable_netpoll(port);
1358         vlan_vids_del_by_dev(port_dev, dev);
1359         if (dev->flags & IFF_UP) {
1360                 dev_uc_unsync(port_dev, dev);
1361                 dev_mc_unsync(port_dev, dev);
1362         }
1363         dev_close(port_dev);
1364         team_port_leave(team, port);
1365
1366         __team_option_inst_mark_removed_port(team, port);
1367         __team_options_change_check(team);
1368         __team_option_inst_del_port(team, port);
1369         __team_port_change_port_removed(port);
1370
1371         team_port_set_orig_dev_addr(port);
1372         dev_set_mtu(port_dev, port->orig.mtu);
1373         kfree_rcu(port, rcu);
1374         netdev_info(dev, "Port device %s removed\n", portname);
1375         __team_compute_features(team);
1376
1377         return 0;
1378 }
1379
1380
1381 /*****************
1382  * Net device ops
1383  *****************/
1384
1385 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1386 {
1387         ctx->data.str_val = team->mode->kind;
1388         return 0;
1389 }
1390
1391 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1392 {
1393         return team_change_mode(team, ctx->data.str_val);
1394 }
1395
1396 static int team_notify_peers_count_get(struct team *team,
1397                                        struct team_gsetter_ctx *ctx)
1398 {
1399         ctx->data.u32_val = team->notify_peers.count;
1400         return 0;
1401 }
1402
1403 static int team_notify_peers_count_set(struct team *team,
1404                                        struct team_gsetter_ctx *ctx)
1405 {
1406         team->notify_peers.count = ctx->data.u32_val;
1407         return 0;
1408 }
1409
1410 static int team_notify_peers_interval_get(struct team *team,
1411                                           struct team_gsetter_ctx *ctx)
1412 {
1413         ctx->data.u32_val = team->notify_peers.interval;
1414         return 0;
1415 }
1416
1417 static int team_notify_peers_interval_set(struct team *team,
1418                                           struct team_gsetter_ctx *ctx)
1419 {
1420         team->notify_peers.interval = ctx->data.u32_val;
1421         return 0;
1422 }
1423
1424 static int team_mcast_rejoin_count_get(struct team *team,
1425                                        struct team_gsetter_ctx *ctx)
1426 {
1427         ctx->data.u32_val = team->mcast_rejoin.count;
1428         return 0;
1429 }
1430
1431 static int team_mcast_rejoin_count_set(struct team *team,
1432                                        struct team_gsetter_ctx *ctx)
1433 {
1434         team->mcast_rejoin.count = ctx->data.u32_val;
1435         return 0;
1436 }
1437
1438 static int team_mcast_rejoin_interval_get(struct team *team,
1439                                           struct team_gsetter_ctx *ctx)
1440 {
1441         ctx->data.u32_val = team->mcast_rejoin.interval;
1442         return 0;
1443 }
1444
1445 static int team_mcast_rejoin_interval_set(struct team *team,
1446                                           struct team_gsetter_ctx *ctx)
1447 {
1448         team->mcast_rejoin.interval = ctx->data.u32_val;
1449         return 0;
1450 }
1451
1452 static int team_port_en_option_get(struct team *team,
1453                                    struct team_gsetter_ctx *ctx)
1454 {
1455         struct team_port *port = ctx->info->port;
1456
1457         ctx->data.bool_val = team_port_enabled(port);
1458         return 0;
1459 }
1460
1461 static int team_port_en_option_set(struct team *team,
1462                                    struct team_gsetter_ctx *ctx)
1463 {
1464         struct team_port *port = ctx->info->port;
1465
1466         if (ctx->data.bool_val)
1467                 team_port_enable(team, port);
1468         else
1469                 team_port_disable(team, port);
1470         return 0;
1471 }
1472
1473 static int team_user_linkup_option_get(struct team *team,
1474                                        struct team_gsetter_ctx *ctx)
1475 {
1476         struct team_port *port = ctx->info->port;
1477
1478         ctx->data.bool_val = port->user.linkup;
1479         return 0;
1480 }
1481
1482 static void __team_carrier_check(struct team *team);
1483
1484 static int team_user_linkup_option_set(struct team *team,
1485                                        struct team_gsetter_ctx *ctx)
1486 {
1487         struct team_port *port = ctx->info->port;
1488
1489         port->user.linkup = ctx->data.bool_val;
1490         team_refresh_port_linkup(port);
1491         __team_carrier_check(port->team);
1492         return 0;
1493 }
1494
1495 static int team_user_linkup_en_option_get(struct team *team,
1496                                           struct team_gsetter_ctx *ctx)
1497 {
1498         struct team_port *port = ctx->info->port;
1499
1500         ctx->data.bool_val = port->user.linkup_enabled;
1501         return 0;
1502 }
1503
1504 static int team_user_linkup_en_option_set(struct team *team,
1505                                           struct team_gsetter_ctx *ctx)
1506 {
1507         struct team_port *port = ctx->info->port;
1508
1509         port->user.linkup_enabled = ctx->data.bool_val;
1510         team_refresh_port_linkup(port);
1511         __team_carrier_check(port->team);
1512         return 0;
1513 }
1514
1515 static int team_priority_option_get(struct team *team,
1516                                     struct team_gsetter_ctx *ctx)
1517 {
1518         struct team_port *port = ctx->info->port;
1519
1520         ctx->data.s32_val = port->priority;
1521         return 0;
1522 }
1523
1524 static int team_priority_option_set(struct team *team,
1525                                     struct team_gsetter_ctx *ctx)
1526 {
1527         struct team_port *port = ctx->info->port;
1528         s32 priority = ctx->data.s32_val;
1529
1530         if (port->priority == priority)
1531                 return 0;
1532         port->priority = priority;
1533         team_queue_override_port_prio_changed(team, port);
1534         return 0;
1535 }
1536
1537 static int team_queue_id_option_get(struct team *team,
1538                                     struct team_gsetter_ctx *ctx)
1539 {
1540         struct team_port *port = ctx->info->port;
1541
1542         ctx->data.u32_val = port->queue_id;
1543         return 0;
1544 }
1545
1546 static int team_queue_id_option_set(struct team *team,
1547                                     struct team_gsetter_ctx *ctx)
1548 {
1549         struct team_port *port = ctx->info->port;
1550         u16 new_queue_id = ctx->data.u32_val;
1551
1552         if (port->queue_id == new_queue_id)
1553                 return 0;
1554         if (new_queue_id >= team->dev->real_num_tx_queues)
1555                 return -EINVAL;
1556         team_queue_override_port_change_queue_id(team, port, new_queue_id);
1557         return 0;
1558 }
1559
1560 static const struct team_option team_options[] = {
1561         {
1562                 .name = "mode",
1563                 .type = TEAM_OPTION_TYPE_STRING,
1564                 .getter = team_mode_option_get,
1565                 .setter = team_mode_option_set,
1566         },
1567         {
1568                 .name = "notify_peers_count",
1569                 .type = TEAM_OPTION_TYPE_U32,
1570                 .getter = team_notify_peers_count_get,
1571                 .setter = team_notify_peers_count_set,
1572         },
1573         {
1574                 .name = "notify_peers_interval",
1575                 .type = TEAM_OPTION_TYPE_U32,
1576                 .getter = team_notify_peers_interval_get,
1577                 .setter = team_notify_peers_interval_set,
1578         },
1579         {
1580                 .name = "mcast_rejoin_count",
1581                 .type = TEAM_OPTION_TYPE_U32,
1582                 .getter = team_mcast_rejoin_count_get,
1583                 .setter = team_mcast_rejoin_count_set,
1584         },
1585         {
1586                 .name = "mcast_rejoin_interval",
1587                 .type = TEAM_OPTION_TYPE_U32,
1588                 .getter = team_mcast_rejoin_interval_get,
1589                 .setter = team_mcast_rejoin_interval_set,
1590         },
1591         {
1592                 .name = "enabled",
1593                 .type = TEAM_OPTION_TYPE_BOOL,
1594                 .per_port = true,
1595                 .getter = team_port_en_option_get,
1596                 .setter = team_port_en_option_set,
1597         },
1598         {
1599                 .name = "user_linkup",
1600                 .type = TEAM_OPTION_TYPE_BOOL,
1601                 .per_port = true,
1602                 .getter = team_user_linkup_option_get,
1603                 .setter = team_user_linkup_option_set,
1604         },
1605         {
1606                 .name = "user_linkup_enabled",
1607                 .type = TEAM_OPTION_TYPE_BOOL,
1608                 .per_port = true,
1609                 .getter = team_user_linkup_en_option_get,
1610                 .setter = team_user_linkup_en_option_set,
1611         },
1612         {
1613                 .name = "priority",
1614                 .type = TEAM_OPTION_TYPE_S32,
1615                 .per_port = true,
1616                 .getter = team_priority_option_get,
1617                 .setter = team_priority_option_set,
1618         },
1619         {
1620                 .name = "queue_id",
1621                 .type = TEAM_OPTION_TYPE_U32,
1622                 .per_port = true,
1623                 .getter = team_queue_id_option_get,
1624                 .setter = team_queue_id_option_set,
1625         },
1626 };
1627
1628
1629 static int team_init(struct net_device *dev)
1630 {
1631         struct team *team = netdev_priv(dev);
1632         int i;
1633         int err;
1634
1635         team->dev = dev;
1636         mutex_init(&team->lock);
1637         team_set_no_mode(team);
1638
1639         team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1640         if (!team->pcpu_stats)
1641                 return -ENOMEM;
1642
1643         for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1644                 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1645         INIT_LIST_HEAD(&team->port_list);
1646         err = team_queue_override_init(team);
1647         if (err)
1648                 goto err_team_queue_override_init;
1649
1650         team_adjust_ops(team);
1651
1652         INIT_LIST_HEAD(&team->option_list);
1653         INIT_LIST_HEAD(&team->option_inst_list);
1654
1655         team_notify_peers_init(team);
1656         team_mcast_rejoin_init(team);
1657
1658         err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1659         if (err)
1660                 goto err_options_register;
1661         netif_carrier_off(dev);
1662
1663         netdev_lockdep_set_classes(dev);
1664
1665         return 0;
1666
1667 err_options_register:
1668         team_mcast_rejoin_fini(team);
1669         team_notify_peers_fini(team);
1670         team_queue_override_fini(team);
1671 err_team_queue_override_init:
1672         free_percpu(team->pcpu_stats);
1673
1674         return err;
1675 }
1676
1677 static void team_uninit(struct net_device *dev)
1678 {
1679         struct team *team = netdev_priv(dev);
1680         struct team_port *port;
1681         struct team_port *tmp;
1682
1683         mutex_lock(&team->lock);
1684         list_for_each_entry_safe(port, tmp, &team->port_list, list)
1685                 team_port_del(team, port->dev);
1686
1687         __team_change_mode(team, NULL); /* cleanup */
1688         __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1689         team_mcast_rejoin_fini(team);
1690         team_notify_peers_fini(team);
1691         team_queue_override_fini(team);
1692         mutex_unlock(&team->lock);
1693 }
1694
1695 static void team_destructor(struct net_device *dev)
1696 {
1697         struct team *team = netdev_priv(dev);
1698
1699         free_percpu(team->pcpu_stats);
1700         free_netdev(dev);
1701 }
1702
1703 static int team_open(struct net_device *dev)
1704 {
1705         return 0;
1706 }
1707
1708 static int team_close(struct net_device *dev)
1709 {
1710         struct team *team = netdev_priv(dev);
1711         struct team_port *port;
1712
1713         list_for_each_entry(port, &team->port_list, list) {
1714                 dev_uc_unsync(port->dev, dev);
1715                 dev_mc_unsync(port->dev, dev);
1716         }
1717
1718         return 0;
1719 }
1720
1721 /*
1722  * note: already called with rcu_read_lock
1723  */
1724 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1725 {
1726         struct team *team = netdev_priv(dev);
1727         bool tx_success;
1728         unsigned int len = skb->len;
1729
1730         tx_success = team_queue_override_transmit(team, skb);
1731         if (!tx_success)
1732                 tx_success = team->ops.transmit(team, skb);
1733         if (tx_success) {
1734                 struct team_pcpu_stats *pcpu_stats;
1735
1736                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1737                 u64_stats_update_begin(&pcpu_stats->syncp);
1738                 pcpu_stats->tx_packets++;
1739                 pcpu_stats->tx_bytes += len;
1740                 u64_stats_update_end(&pcpu_stats->syncp);
1741         } else {
1742                 this_cpu_inc(team->pcpu_stats->tx_dropped);
1743         }
1744
1745         return NETDEV_TX_OK;
1746 }
1747
1748 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1749                              void *accel_priv, select_queue_fallback_t fallback)
1750 {
1751         /*
1752          * This helper function exists to help dev_pick_tx get the correct
1753          * destination queue.  Using a helper function skips a call to
1754          * skb_tx_hash and will put the skbs in the queue we expect on their
1755          * way down to the team driver.
1756          */
1757         u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1758
1759         /*
1760          * Save the original txq to restore before passing to the driver
1761          */
1762         qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1763
1764         if (unlikely(txq >= dev->real_num_tx_queues)) {
1765                 do {
1766                         txq -= dev->real_num_tx_queues;
1767                 } while (txq >= dev->real_num_tx_queues);
1768         }
1769         return txq;
1770 }
1771
1772 static void team_change_rx_flags(struct net_device *dev, int change)
1773 {
1774         struct team *team = netdev_priv(dev);
1775         struct team_port *port;
1776         int inc;
1777
1778         rcu_read_lock();
1779         list_for_each_entry_rcu(port, &team->port_list, list) {
1780                 if (change & IFF_PROMISC) {
1781                         inc = dev->flags & IFF_PROMISC ? 1 : -1;
1782                         dev_set_promiscuity(port->dev, inc);
1783                 }
1784                 if (change & IFF_ALLMULTI) {
1785                         inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1786                         dev_set_allmulti(port->dev, inc);
1787                 }
1788         }
1789         rcu_read_unlock();
1790 }
1791
1792 static void team_set_rx_mode(struct net_device *dev)
1793 {
1794         struct team *team = netdev_priv(dev);
1795         struct team_port *port;
1796
1797         rcu_read_lock();
1798         list_for_each_entry_rcu(port, &team->port_list, list) {
1799                 dev_uc_sync_multiple(port->dev, dev);
1800                 dev_mc_sync_multiple(port->dev, dev);
1801         }
1802         rcu_read_unlock();
1803 }
1804
1805 static int team_set_mac_address(struct net_device *dev, void *p)
1806 {
1807         struct sockaddr *addr = p;
1808         struct team *team = netdev_priv(dev);
1809         struct team_port *port;
1810
1811         if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1812                 return -EADDRNOTAVAIL;
1813         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1814         mutex_lock(&team->lock);
1815         list_for_each_entry(port, &team->port_list, list)
1816                 if (team->ops.port_change_dev_addr)
1817                         team->ops.port_change_dev_addr(team, port);
1818         mutex_unlock(&team->lock);
1819         return 0;
1820 }
1821
1822 static int team_change_mtu(struct net_device *dev, int new_mtu)
1823 {
1824         struct team *team = netdev_priv(dev);
1825         struct team_port *port;
1826         int err;
1827
1828         /*
1829          * Alhough this is reader, it's guarded by team lock. It's not possible
1830          * to traverse list in reverse under rcu_read_lock
1831          */
1832         mutex_lock(&team->lock);
1833         team->port_mtu_change_allowed = true;
1834         list_for_each_entry(port, &team->port_list, list) {
1835                 err = dev_set_mtu(port->dev, new_mtu);
1836                 if (err) {
1837                         netdev_err(dev, "Device %s failed to change mtu",
1838                                    port->dev->name);
1839                         goto unwind;
1840                 }
1841         }
1842         team->port_mtu_change_allowed = false;
1843         mutex_unlock(&team->lock);
1844
1845         dev->mtu = new_mtu;
1846
1847         return 0;
1848
1849 unwind:
1850         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1851                 dev_set_mtu(port->dev, dev->mtu);
1852         team->port_mtu_change_allowed = false;
1853         mutex_unlock(&team->lock);
1854
1855         return err;
1856 }
1857
1858 static struct rtnl_link_stats64 *
1859 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1860 {
1861         struct team *team = netdev_priv(dev);
1862         struct team_pcpu_stats *p;
1863         u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1864         u32 rx_dropped = 0, tx_dropped = 0, rx_nohandler = 0;
1865         unsigned int start;
1866         int i;
1867
1868         for_each_possible_cpu(i) {
1869                 p = per_cpu_ptr(team->pcpu_stats, i);
1870                 do {
1871                         start = u64_stats_fetch_begin_irq(&p->syncp);
1872                         rx_packets      = p->rx_packets;
1873                         rx_bytes        = p->rx_bytes;
1874                         rx_multicast    = p->rx_multicast;
1875                         tx_packets      = p->tx_packets;
1876                         tx_bytes        = p->tx_bytes;
1877                 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
1878
1879                 stats->rx_packets       += rx_packets;
1880                 stats->rx_bytes         += rx_bytes;
1881                 stats->multicast        += rx_multicast;
1882                 stats->tx_packets       += tx_packets;
1883                 stats->tx_bytes         += tx_bytes;
1884                 /*
1885                  * rx_dropped, tx_dropped & rx_nohandler are u32,
1886                  * updated without syncp protection.
1887                  */
1888                 rx_dropped      += p->rx_dropped;
1889                 tx_dropped      += p->tx_dropped;
1890                 rx_nohandler    += p->rx_nohandler;
1891         }
1892         stats->rx_dropped       = rx_dropped;
1893         stats->tx_dropped       = tx_dropped;
1894         stats->rx_nohandler     = rx_nohandler;
1895         return stats;
1896 }
1897
1898 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1899 {
1900         struct team *team = netdev_priv(dev);
1901         struct team_port *port;
1902         int err;
1903
1904         /*
1905          * Alhough this is reader, it's guarded by team lock. It's not possible
1906          * to traverse list in reverse under rcu_read_lock
1907          */
1908         mutex_lock(&team->lock);
1909         list_for_each_entry(port, &team->port_list, list) {
1910                 err = vlan_vid_add(port->dev, proto, vid);
1911                 if (err)
1912                         goto unwind;
1913         }
1914         mutex_unlock(&team->lock);
1915
1916         return 0;
1917
1918 unwind:
1919         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1920                 vlan_vid_del(port->dev, proto, vid);
1921         mutex_unlock(&team->lock);
1922
1923         return err;
1924 }
1925
1926 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1927 {
1928         struct team *team = netdev_priv(dev);
1929         struct team_port *port;
1930
1931         mutex_lock(&team->lock);
1932         list_for_each_entry(port, &team->port_list, list)
1933                 vlan_vid_del(port->dev, proto, vid);
1934         mutex_unlock(&team->lock);
1935
1936         return 0;
1937 }
1938
1939 #ifdef CONFIG_NET_POLL_CONTROLLER
1940 static void team_poll_controller(struct net_device *dev)
1941 {
1942 }
1943
1944 static void __team_netpoll_cleanup(struct team *team)
1945 {
1946         struct team_port *port;
1947
1948         list_for_each_entry(port, &team->port_list, list)
1949                 team_port_disable_netpoll(port);
1950 }
1951
1952 static void team_netpoll_cleanup(struct net_device *dev)
1953 {
1954         struct team *team = netdev_priv(dev);
1955
1956         mutex_lock(&team->lock);
1957         __team_netpoll_cleanup(team);
1958         mutex_unlock(&team->lock);
1959 }
1960
1961 static int team_netpoll_setup(struct net_device *dev,
1962                               struct netpoll_info *npifo)
1963 {
1964         struct team *team = netdev_priv(dev);
1965         struct team_port *port;
1966         int err = 0;
1967
1968         mutex_lock(&team->lock);
1969         list_for_each_entry(port, &team->port_list, list) {
1970                 err = __team_port_enable_netpoll(port);
1971                 if (err) {
1972                         __team_netpoll_cleanup(team);
1973                         break;
1974                 }
1975         }
1976         mutex_unlock(&team->lock);
1977         return err;
1978 }
1979 #endif
1980
1981 static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
1982 {
1983         struct team *team = netdev_priv(dev);
1984         int err;
1985
1986         mutex_lock(&team->lock);
1987         err = team_port_add(team, port_dev);
1988         mutex_unlock(&team->lock);
1989         return err;
1990 }
1991
1992 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1993 {
1994         struct team *team = netdev_priv(dev);
1995         int err;
1996
1997         mutex_lock(&team->lock);
1998         err = team_port_del(team, port_dev);
1999         mutex_unlock(&team->lock);
2000         return err;
2001 }
2002
2003 static netdev_features_t team_fix_features(struct net_device *dev,
2004                                            netdev_features_t features)
2005 {
2006         struct team_port *port;
2007         struct team *team = netdev_priv(dev);
2008         netdev_features_t mask;
2009
2010         mask = features;
2011         features &= ~NETIF_F_ONE_FOR_ALL;
2012         features |= NETIF_F_ALL_FOR_ALL;
2013
2014         rcu_read_lock();
2015         list_for_each_entry_rcu(port, &team->port_list, list) {
2016                 features = netdev_increment_features(features,
2017                                                      port->dev->features,
2018                                                      mask);
2019         }
2020         rcu_read_unlock();
2021
2022         features = netdev_add_tso_features(features, mask);
2023
2024         return features;
2025 }
2026
2027 static int team_change_carrier(struct net_device *dev, bool new_carrier)
2028 {
2029         struct team *team = netdev_priv(dev);
2030
2031         team->user_carrier_enabled = true;
2032
2033         if (new_carrier)
2034                 netif_carrier_on(dev);
2035         else
2036                 netif_carrier_off(dev);
2037         return 0;
2038 }
2039
2040 static const struct net_device_ops team_netdev_ops = {
2041         .ndo_init               = team_init,
2042         .ndo_uninit             = team_uninit,
2043         .ndo_open               = team_open,
2044         .ndo_stop               = team_close,
2045         .ndo_start_xmit         = team_xmit,
2046         .ndo_select_queue       = team_select_queue,
2047         .ndo_change_rx_flags    = team_change_rx_flags,
2048         .ndo_set_rx_mode        = team_set_rx_mode,
2049         .ndo_set_mac_address    = team_set_mac_address,
2050         .ndo_change_mtu         = team_change_mtu,
2051         .ndo_get_stats64        = team_get_stats64,
2052         .ndo_vlan_rx_add_vid    = team_vlan_rx_add_vid,
2053         .ndo_vlan_rx_kill_vid   = team_vlan_rx_kill_vid,
2054 #ifdef CONFIG_NET_POLL_CONTROLLER
2055         .ndo_poll_controller    = team_poll_controller,
2056         .ndo_netpoll_setup      = team_netpoll_setup,
2057         .ndo_netpoll_cleanup    = team_netpoll_cleanup,
2058 #endif
2059         .ndo_add_slave          = team_add_slave,
2060         .ndo_del_slave          = team_del_slave,
2061         .ndo_fix_features       = team_fix_features,
2062         .ndo_neigh_construct    = netdev_default_l2upper_neigh_construct,
2063         .ndo_neigh_destroy      = netdev_default_l2upper_neigh_destroy,
2064         .ndo_change_carrier     = team_change_carrier,
2065         .ndo_bridge_setlink     = switchdev_port_bridge_setlink,
2066         .ndo_bridge_getlink     = switchdev_port_bridge_getlink,
2067         .ndo_bridge_dellink     = switchdev_port_bridge_dellink,
2068         .ndo_fdb_add            = switchdev_port_fdb_add,
2069         .ndo_fdb_del            = switchdev_port_fdb_del,
2070         .ndo_fdb_dump           = switchdev_port_fdb_dump,
2071         .ndo_features_check     = passthru_features_check,
2072 };
2073
2074 /***********************
2075  * ethtool interface
2076  ***********************/
2077
2078 static void team_ethtool_get_drvinfo(struct net_device *dev,
2079                                      struct ethtool_drvinfo *drvinfo)
2080 {
2081         strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
2082         strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2083 }
2084
2085 static const struct ethtool_ops team_ethtool_ops = {
2086         .get_drvinfo            = team_ethtool_get_drvinfo,
2087         .get_link               = ethtool_op_get_link,
2088 };
2089
2090 /***********************
2091  * rt netlink interface
2092  ***********************/
2093
2094 static void team_setup_by_port(struct net_device *dev,
2095                                struct net_device *port_dev)
2096 {
2097         dev->header_ops = port_dev->header_ops;
2098         dev->type = port_dev->type;
2099         dev->hard_header_len = port_dev->hard_header_len;
2100         dev->needed_headroom = port_dev->needed_headroom;
2101         dev->addr_len = port_dev->addr_len;
2102         dev->mtu = port_dev->mtu;
2103         memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2104         eth_hw_addr_inherit(dev, port_dev);
2105 }
2106
2107 static int team_dev_type_check_change(struct net_device *dev,
2108                                       struct net_device *port_dev)
2109 {
2110         struct team *team = netdev_priv(dev);
2111         char *portname = port_dev->name;
2112         int err;
2113
2114         if (dev->type == port_dev->type)
2115                 return 0;
2116         if (!list_empty(&team->port_list)) {
2117                 netdev_err(dev, "Device %s is of different type\n", portname);
2118                 return -EBUSY;
2119         }
2120         err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2121         err = notifier_to_errno(err);
2122         if (err) {
2123                 netdev_err(dev, "Refused to change device type\n");
2124                 return err;
2125         }
2126         dev_uc_flush(dev);
2127         dev_mc_flush(dev);
2128         team_setup_by_port(dev, port_dev);
2129         call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2130         return 0;
2131 }
2132
2133 static void team_setup(struct net_device *dev)
2134 {
2135         ether_setup(dev);
2136
2137         dev->netdev_ops = &team_netdev_ops;
2138         dev->ethtool_ops = &team_ethtool_ops;
2139         dev->destructor = team_destructor;
2140         dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2141         dev->priv_flags |= IFF_NO_QUEUE;
2142         dev->priv_flags |= IFF_TEAM;
2143
2144         /*
2145          * Indicate we support unicast address filtering. That way core won't
2146          * bring us to promisc mode in case a unicast addr is added.
2147          * Let this up to underlay drivers.
2148          */
2149         dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2150
2151         dev->features |= NETIF_F_LLTX;
2152         dev->features |= NETIF_F_GRO;
2153
2154         /* Don't allow team devices to change network namespaces. */
2155         dev->features |= NETIF_F_NETNS_LOCAL;
2156
2157         dev->hw_features = TEAM_VLAN_FEATURES |
2158                            NETIF_F_HW_VLAN_CTAG_RX |
2159                            NETIF_F_HW_VLAN_CTAG_FILTER;
2160
2161         dev->hw_features |= NETIF_F_GSO_ENCAP_ALL;
2162         dev->features |= dev->hw_features;
2163         dev->features |= NETIF_F_HW_VLAN_CTAG_TX;
2164 }
2165
2166 static int team_newlink(struct net *src_net, struct net_device *dev,
2167                         struct nlattr *tb[], struct nlattr *data[])
2168 {
2169         if (tb[IFLA_ADDRESS] == NULL)
2170                 eth_hw_addr_random(dev);
2171
2172         return register_netdevice(dev);
2173 }
2174
2175 static int team_validate(struct nlattr *tb[], struct nlattr *data[])
2176 {
2177         if (tb[IFLA_ADDRESS]) {
2178                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2179                         return -EINVAL;
2180                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2181                         return -EADDRNOTAVAIL;
2182         }
2183         return 0;
2184 }
2185
2186 static unsigned int team_get_num_tx_queues(void)
2187 {
2188         return TEAM_DEFAULT_NUM_TX_QUEUES;
2189 }
2190
2191 static unsigned int team_get_num_rx_queues(void)
2192 {
2193         return TEAM_DEFAULT_NUM_RX_QUEUES;
2194 }
2195
2196 static struct rtnl_link_ops team_link_ops __read_mostly = {
2197         .kind                   = DRV_NAME,
2198         .priv_size              = sizeof(struct team),
2199         .setup                  = team_setup,
2200         .newlink                = team_newlink,
2201         .validate               = team_validate,
2202         .get_num_tx_queues      = team_get_num_tx_queues,
2203         .get_num_rx_queues      = team_get_num_rx_queues,
2204 };
2205
2206
2207 /***********************************
2208  * Generic netlink custom interface
2209  ***********************************/
2210
2211 static struct genl_family team_nl_family = {
2212         .id             = GENL_ID_GENERATE,
2213         .name           = TEAM_GENL_NAME,
2214         .version        = TEAM_GENL_VERSION,
2215         .maxattr        = TEAM_ATTR_MAX,
2216         .netnsok        = true,
2217 };
2218
2219 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2220         [TEAM_ATTR_UNSPEC]                      = { .type = NLA_UNSPEC, },
2221         [TEAM_ATTR_TEAM_IFINDEX]                = { .type = NLA_U32 },
2222         [TEAM_ATTR_LIST_OPTION]                 = { .type = NLA_NESTED },
2223         [TEAM_ATTR_LIST_PORT]                   = { .type = NLA_NESTED },
2224 };
2225
2226 static const struct nla_policy
2227 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2228         [TEAM_ATTR_OPTION_UNSPEC]               = { .type = NLA_UNSPEC, },
2229         [TEAM_ATTR_OPTION_NAME] = {
2230                 .type = NLA_STRING,
2231                 .len = TEAM_STRING_MAX_LEN,
2232         },
2233         [TEAM_ATTR_OPTION_CHANGED]              = { .type = NLA_FLAG },
2234         [TEAM_ATTR_OPTION_TYPE]                 = { .type = NLA_U8 },
2235         [TEAM_ATTR_OPTION_DATA]                 = { .type = NLA_BINARY },
2236         [TEAM_ATTR_OPTION_PORT_IFINDEX]         = { .type = NLA_U32 },
2237         [TEAM_ATTR_OPTION_ARRAY_INDEX]          = { .type = NLA_U32 },
2238 };
2239
2240 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2241 {
2242         struct sk_buff *msg;
2243         void *hdr;
2244         int err;
2245
2246         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2247         if (!msg)
2248                 return -ENOMEM;
2249
2250         hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2251                           &team_nl_family, 0, TEAM_CMD_NOOP);
2252         if (!hdr) {
2253                 err = -EMSGSIZE;
2254                 goto err_msg_put;
2255         }
2256
2257         genlmsg_end(msg, hdr);
2258
2259         return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2260
2261 err_msg_put:
2262         nlmsg_free(msg);
2263
2264         return err;
2265 }
2266
2267 /*
2268  * Netlink cmd functions should be locked by following two functions.
2269  * Since dev gets held here, that ensures dev won't disappear in between.
2270  */
2271 static struct team *team_nl_team_get(struct genl_info *info)
2272 {
2273         struct net *net = genl_info_net(info);
2274         int ifindex;
2275         struct net_device *dev;
2276         struct team *team;
2277
2278         if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2279                 return NULL;
2280
2281         ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2282         dev = dev_get_by_index(net, ifindex);
2283         if (!dev || dev->netdev_ops != &team_netdev_ops) {
2284                 if (dev)
2285                         dev_put(dev);
2286                 return NULL;
2287         }
2288
2289         team = netdev_priv(dev);
2290         mutex_lock(&team->lock);
2291         return team;
2292 }
2293
2294 static void team_nl_team_put(struct team *team)
2295 {
2296         mutex_unlock(&team->lock);
2297         dev_put(team->dev);
2298 }
2299
2300 typedef int team_nl_send_func_t(struct sk_buff *skb,
2301                                 struct team *team, u32 portid);
2302
2303 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2304 {
2305         return genlmsg_unicast(dev_net(team->dev), skb, portid);
2306 }
2307
2308 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2309                                        struct team_option_inst *opt_inst)
2310 {
2311         struct nlattr *option_item;
2312         struct team_option *option = opt_inst->option;
2313         struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2314         struct team_gsetter_ctx ctx;
2315         int err;
2316
2317         ctx.info = opt_inst_info;
2318         err = team_option_get(team, opt_inst, &ctx);
2319         if (err)
2320                 return err;
2321
2322         option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
2323         if (!option_item)
2324                 return -EMSGSIZE;
2325
2326         if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2327                 goto nest_cancel;
2328         if (opt_inst_info->port &&
2329             nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2330                         opt_inst_info->port->dev->ifindex))
2331                 goto nest_cancel;
2332         if (opt_inst->option->array_size &&
2333             nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2334                         opt_inst_info->array_index))
2335                 goto nest_cancel;
2336
2337         switch (option->type) {
2338         case TEAM_OPTION_TYPE_U32:
2339                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2340                         goto nest_cancel;
2341                 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2342                         goto nest_cancel;
2343                 break;
2344         case TEAM_OPTION_TYPE_STRING:
2345                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2346                         goto nest_cancel;
2347                 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2348                                    ctx.data.str_val))
2349                         goto nest_cancel;
2350                 break;
2351         case TEAM_OPTION_TYPE_BINARY:
2352                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2353                         goto nest_cancel;
2354                 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2355                             ctx.data.bin_val.ptr))
2356                         goto nest_cancel;
2357                 break;
2358         case TEAM_OPTION_TYPE_BOOL:
2359                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2360                         goto nest_cancel;
2361                 if (ctx.data.bool_val &&
2362                     nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2363                         goto nest_cancel;
2364                 break;
2365         case TEAM_OPTION_TYPE_S32:
2366                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2367                         goto nest_cancel;
2368                 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2369                         goto nest_cancel;
2370                 break;
2371         default:
2372                 BUG();
2373         }
2374         if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2375                 goto nest_cancel;
2376         if (opt_inst->changed) {
2377                 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2378                         goto nest_cancel;
2379                 opt_inst->changed = false;
2380         }
2381         nla_nest_end(skb, option_item);
2382         return 0;
2383
2384 nest_cancel:
2385         nla_nest_cancel(skb, option_item);
2386         return -EMSGSIZE;
2387 }
2388
2389 static int __send_and_alloc_skb(struct sk_buff **pskb,
2390                                 struct team *team, u32 portid,
2391                                 team_nl_send_func_t *send_func)
2392 {
2393         int err;
2394
2395         if (*pskb) {
2396                 err = send_func(*pskb, team, portid);
2397                 if (err)
2398                         return err;
2399         }
2400         *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2401         if (!*pskb)
2402                 return -ENOMEM;
2403         return 0;
2404 }
2405
2406 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2407                                     int flags, team_nl_send_func_t *send_func,
2408                                     struct list_head *sel_opt_inst_list)
2409 {
2410         struct nlattr *option_list;
2411         struct nlmsghdr *nlh;
2412         void *hdr;
2413         struct team_option_inst *opt_inst;
2414         int err;
2415         struct sk_buff *skb = NULL;
2416         bool incomplete;
2417         int i;
2418
2419         opt_inst = list_first_entry(sel_opt_inst_list,
2420                                     struct team_option_inst, tmp_list);
2421
2422 start_again:
2423         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2424         if (err)
2425                 return err;
2426
2427         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2428                           TEAM_CMD_OPTIONS_GET);
2429         if (!hdr) {
2430                 nlmsg_free(skb);
2431                 return -EMSGSIZE;
2432         }
2433
2434         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2435                 goto nla_put_failure;
2436         option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2437         if (!option_list)
2438                 goto nla_put_failure;
2439
2440         i = 0;
2441         incomplete = false;
2442         list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2443                 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2444                 if (err) {
2445                         if (err == -EMSGSIZE) {
2446                                 if (!i)
2447                                         goto errout;
2448                                 incomplete = true;
2449                                 break;
2450                         }
2451                         goto errout;
2452                 }
2453                 i++;
2454         }
2455
2456         nla_nest_end(skb, option_list);
2457         genlmsg_end(skb, hdr);
2458         if (incomplete)
2459                 goto start_again;
2460
2461 send_done:
2462         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2463         if (!nlh) {
2464                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2465                 if (err)
2466                         return err;
2467                 goto send_done;
2468         }
2469
2470         return send_func(skb, team, portid);
2471
2472 nla_put_failure:
2473         err = -EMSGSIZE;
2474 errout:
2475         genlmsg_cancel(skb, hdr);
2476         nlmsg_free(skb);
2477         return err;
2478 }
2479
2480 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2481 {
2482         struct team *team;
2483         struct team_option_inst *opt_inst;
2484         int err;
2485         LIST_HEAD(sel_opt_inst_list);
2486
2487         team = team_nl_team_get(info);
2488         if (!team)
2489                 return -EINVAL;
2490
2491         list_for_each_entry(opt_inst, &team->option_inst_list, list)
2492                 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2493         err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2494                                        NLM_F_ACK, team_nl_send_unicast,
2495                                        &sel_opt_inst_list);
2496
2497         team_nl_team_put(team);
2498
2499         return err;
2500 }
2501
2502 static int team_nl_send_event_options_get(struct team *team,
2503                                           struct list_head *sel_opt_inst_list);
2504
2505 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2506 {
2507         struct team *team;
2508         int err = 0;
2509         int i;
2510         struct nlattr *nl_option;
2511
2512         rtnl_lock();
2513
2514         team = team_nl_team_get(info);
2515         if (!team) {
2516                 err = -EINVAL;
2517                 goto rtnl_unlock;
2518         }
2519
2520         err = -EINVAL;
2521         if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2522                 err = -EINVAL;
2523                 goto team_put;
2524         }
2525
2526         nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2527                 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2528                 struct nlattr *attr;
2529                 struct nlattr *attr_data;
2530                 LIST_HEAD(opt_inst_list);
2531                 enum team_option_type opt_type;
2532                 int opt_port_ifindex = 0; /* != 0 for per-port options */
2533                 u32 opt_array_index = 0;
2534                 bool opt_is_array = false;
2535                 struct team_option_inst *opt_inst;
2536                 char *opt_name;
2537                 bool opt_found = false;
2538
2539                 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2540                         err = -EINVAL;
2541                         goto team_put;
2542                 }
2543                 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2544                                        nl_option, team_nl_option_policy);
2545                 if (err)
2546                         goto team_put;
2547                 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2548                     !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2549                         err = -EINVAL;
2550                         goto team_put;
2551                 }
2552                 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2553                 case NLA_U32:
2554                         opt_type = TEAM_OPTION_TYPE_U32;
2555                         break;
2556                 case NLA_STRING:
2557                         opt_type = TEAM_OPTION_TYPE_STRING;
2558                         break;
2559                 case NLA_BINARY:
2560                         opt_type = TEAM_OPTION_TYPE_BINARY;
2561                         break;
2562                 case NLA_FLAG:
2563                         opt_type = TEAM_OPTION_TYPE_BOOL;
2564                         break;
2565                 case NLA_S32:
2566                         opt_type = TEAM_OPTION_TYPE_S32;
2567                         break;
2568                 default:
2569                         goto team_put;
2570                 }
2571
2572                 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2573                 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2574                         err = -EINVAL;
2575                         goto team_put;
2576                 }
2577
2578                 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2579                 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2580                 if (attr)
2581                         opt_port_ifindex = nla_get_u32(attr);
2582
2583                 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2584                 if (attr) {
2585                         opt_is_array = true;
2586                         opt_array_index = nla_get_u32(attr);
2587                 }
2588
2589                 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2590                         struct team_option *option = opt_inst->option;
2591                         struct team_gsetter_ctx ctx;
2592                         struct team_option_inst_info *opt_inst_info;
2593                         int tmp_ifindex;
2594
2595                         opt_inst_info = &opt_inst->info;
2596                         tmp_ifindex = opt_inst_info->port ?
2597                                       opt_inst_info->port->dev->ifindex : 0;
2598                         if (option->type != opt_type ||
2599                             strcmp(option->name, opt_name) ||
2600                             tmp_ifindex != opt_port_ifindex ||
2601                             (option->array_size && !opt_is_array) ||
2602                             opt_inst_info->array_index != opt_array_index)
2603                                 continue;
2604                         opt_found = true;
2605                         ctx.info = opt_inst_info;
2606                         switch (opt_type) {
2607                         case TEAM_OPTION_TYPE_U32:
2608                                 ctx.data.u32_val = nla_get_u32(attr_data);
2609                                 break;
2610                         case TEAM_OPTION_TYPE_STRING:
2611                                 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2612                                         err = -EINVAL;
2613                                         goto team_put;
2614                                 }
2615                                 ctx.data.str_val = nla_data(attr_data);
2616                                 break;
2617                         case TEAM_OPTION_TYPE_BINARY:
2618                                 ctx.data.bin_val.len = nla_len(attr_data);
2619                                 ctx.data.bin_val.ptr = nla_data(attr_data);
2620                                 break;
2621                         case TEAM_OPTION_TYPE_BOOL:
2622                                 ctx.data.bool_val = attr_data ? true : false;
2623                                 break;
2624                         case TEAM_OPTION_TYPE_S32:
2625                                 ctx.data.s32_val = nla_get_s32(attr_data);
2626                                 break;
2627                         default:
2628                                 BUG();
2629                         }
2630                         err = team_option_set(team, opt_inst, &ctx);
2631                         if (err)
2632                                 goto team_put;
2633                         opt_inst->changed = true;
2634                         list_add(&opt_inst->tmp_list, &opt_inst_list);
2635                 }
2636                 if (!opt_found) {
2637                         err = -ENOENT;
2638                         goto team_put;
2639                 }
2640
2641                 err = team_nl_send_event_options_get(team, &opt_inst_list);
2642                 if (err)
2643                         break;
2644         }
2645
2646 team_put:
2647         team_nl_team_put(team);
2648 rtnl_unlock:
2649         rtnl_unlock();
2650         return err;
2651 }
2652
2653 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2654                                      struct team_port *port)
2655 {
2656         struct nlattr *port_item;
2657
2658         port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2659         if (!port_item)
2660                 goto nest_cancel;
2661         if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2662                 goto nest_cancel;
2663         if (port->changed) {
2664                 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2665                         goto nest_cancel;
2666                 port->changed = false;
2667         }
2668         if ((port->removed &&
2669              nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2670             (port->state.linkup &&
2671              nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2672             nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2673             nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2674                 goto nest_cancel;
2675         nla_nest_end(skb, port_item);
2676         return 0;
2677
2678 nest_cancel:
2679         nla_nest_cancel(skb, port_item);
2680         return -EMSGSIZE;
2681 }
2682
2683 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2684                                       int flags, team_nl_send_func_t *send_func,
2685                                       struct team_port *one_port)
2686 {
2687         struct nlattr *port_list;
2688         struct nlmsghdr *nlh;
2689         void *hdr;
2690         struct team_port *port;
2691         int err;
2692         struct sk_buff *skb = NULL;
2693         bool incomplete;
2694         int i;
2695
2696         port = list_first_entry_or_null(&team->port_list,
2697                                         struct team_port, list);
2698
2699 start_again:
2700         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2701         if (err)
2702                 return err;
2703
2704         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2705                           TEAM_CMD_PORT_LIST_GET);
2706         if (!hdr) {
2707                 nlmsg_free(skb);
2708                 return -EMSGSIZE;
2709         }
2710
2711         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2712                 goto nla_put_failure;
2713         port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2714         if (!port_list)
2715                 goto nla_put_failure;
2716
2717         i = 0;
2718         incomplete = false;
2719
2720         /* If one port is selected, called wants to send port list containing
2721          * only this port. Otherwise go through all listed ports and send all
2722          */
2723         if (one_port) {
2724                 err = team_nl_fill_one_port_get(skb, one_port);
2725                 if (err)
2726                         goto errout;
2727         } else if (port) {
2728                 list_for_each_entry_from(port, &team->port_list, list) {
2729                         err = team_nl_fill_one_port_get(skb, port);
2730                         if (err) {
2731                                 if (err == -EMSGSIZE) {
2732                                         if (!i)
2733                                                 goto errout;
2734                                         incomplete = true;
2735                                         break;
2736                                 }
2737                                 goto errout;
2738                         }
2739                         i++;
2740                 }
2741         }
2742
2743         nla_nest_end(skb, port_list);
2744         genlmsg_end(skb, hdr);
2745         if (incomplete)
2746                 goto start_again;
2747
2748 send_done:
2749         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2750         if (!nlh) {
2751                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2752                 if (err)
2753                         return err;
2754                 goto send_done;
2755         }
2756
2757         return send_func(skb, team, portid);
2758
2759 nla_put_failure:
2760         err = -EMSGSIZE;
2761 errout:
2762         genlmsg_cancel(skb, hdr);
2763         nlmsg_free(skb);
2764         return err;
2765 }
2766
2767 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2768                                      struct genl_info *info)
2769 {
2770         struct team *team;
2771         int err;
2772
2773         team = team_nl_team_get(info);
2774         if (!team)
2775                 return -EINVAL;
2776
2777         err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2778                                          NLM_F_ACK, team_nl_send_unicast, NULL);
2779
2780         team_nl_team_put(team);
2781
2782         return err;
2783 }
2784
2785 static const struct genl_ops team_nl_ops[] = {
2786         {
2787                 .cmd = TEAM_CMD_NOOP,
2788                 .doit = team_nl_cmd_noop,
2789                 .policy = team_nl_policy,
2790         },
2791         {
2792                 .cmd = TEAM_CMD_OPTIONS_SET,
2793                 .doit = team_nl_cmd_options_set,
2794                 .policy = team_nl_policy,
2795                 .flags = GENL_ADMIN_PERM,
2796         },
2797         {
2798                 .cmd = TEAM_CMD_OPTIONS_GET,
2799                 .doit = team_nl_cmd_options_get,
2800                 .policy = team_nl_policy,
2801                 .flags = GENL_ADMIN_PERM,
2802         },
2803         {
2804                 .cmd = TEAM_CMD_PORT_LIST_GET,
2805                 .doit = team_nl_cmd_port_list_get,
2806                 .policy = team_nl_policy,
2807                 .flags = GENL_ADMIN_PERM,
2808         },
2809 };
2810
2811 static const struct genl_multicast_group team_nl_mcgrps[] = {
2812         { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2813 };
2814
2815 static int team_nl_send_multicast(struct sk_buff *skb,
2816                                   struct team *team, u32 portid)
2817 {
2818         return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2819                                        skb, 0, 0, GFP_KERNEL);
2820 }
2821
2822 static int team_nl_send_event_options_get(struct team *team,
2823                                           struct list_head *sel_opt_inst_list)
2824 {
2825         return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2826                                         sel_opt_inst_list);
2827 }
2828
2829 static int team_nl_send_event_port_get(struct team *team,
2830                                        struct team_port *port)
2831 {
2832         return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2833                                           port);
2834 }
2835
2836 static int team_nl_init(void)
2837 {
2838         return genl_register_family_with_ops_groups(&team_nl_family, team_nl_ops,
2839                                                     team_nl_mcgrps);
2840 }
2841
2842 static void team_nl_fini(void)
2843 {
2844         genl_unregister_family(&team_nl_family);
2845 }
2846
2847
2848 /******************
2849  * Change checkers
2850  ******************/
2851
2852 static void __team_options_change_check(struct team *team)
2853 {
2854         int err;
2855         struct team_option_inst *opt_inst;
2856         LIST_HEAD(sel_opt_inst_list);
2857
2858         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2859                 if (opt_inst->changed)
2860                         list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2861         }
2862         err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2863         if (err && err != -ESRCH)
2864                 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2865                             err);
2866 }
2867
2868 /* rtnl lock is held */
2869
2870 static void __team_port_change_send(struct team_port *port, bool linkup)
2871 {
2872         int err;
2873
2874         port->changed = true;
2875         port->state.linkup = linkup;
2876         team_refresh_port_linkup(port);
2877         if (linkup) {
2878                 struct ethtool_link_ksettings ecmd;
2879
2880                 err = __ethtool_get_link_ksettings(port->dev, &ecmd);
2881                 if (!err) {
2882                         port->state.speed = ecmd.base.speed;
2883                         port->state.duplex = ecmd.base.duplex;
2884                         goto send_event;
2885                 }
2886         }
2887         port->state.speed = 0;
2888         port->state.duplex = 0;
2889
2890 send_event:
2891         err = team_nl_send_event_port_get(port->team, port);
2892         if (err && err != -ESRCH)
2893                 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2894                             port->dev->name, err);
2895
2896 }
2897
2898 static void __team_carrier_check(struct team *team)
2899 {
2900         struct team_port *port;
2901         bool team_linkup;
2902
2903         if (team->user_carrier_enabled)
2904                 return;
2905
2906         team_linkup = false;
2907         list_for_each_entry(port, &team->port_list, list) {
2908                 if (port->linkup) {
2909                         team_linkup = true;
2910                         break;
2911                 }
2912         }
2913
2914         if (team_linkup)
2915                 netif_carrier_on(team->dev);
2916         else
2917                 netif_carrier_off(team->dev);
2918 }
2919
2920 static void __team_port_change_check(struct team_port *port, bool linkup)
2921 {
2922         if (port->state.linkup != linkup)
2923                 __team_port_change_send(port, linkup);
2924         __team_carrier_check(port->team);
2925 }
2926
2927 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2928 {
2929         __team_port_change_send(port, linkup);
2930         __team_carrier_check(port->team);
2931 }
2932
2933 static void __team_port_change_port_removed(struct team_port *port)
2934 {
2935         port->removed = true;
2936         __team_port_change_send(port, false);
2937         __team_carrier_check(port->team);
2938 }
2939
2940 static void team_port_change_check(struct team_port *port, bool linkup)
2941 {
2942         struct team *team = port->team;
2943
2944         mutex_lock(&team->lock);
2945         __team_port_change_check(port, linkup);
2946         mutex_unlock(&team->lock);
2947 }
2948
2949
2950 /************************************
2951  * Net device notifier event handler
2952  ************************************/
2953
2954 static int team_device_event(struct notifier_block *unused,
2955                              unsigned long event, void *ptr)
2956 {
2957         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2958         struct team_port *port;
2959
2960         port = team_port_get_rtnl(dev);
2961         if (!port)
2962                 return NOTIFY_DONE;
2963
2964         switch (event) {
2965         case NETDEV_UP:
2966                 if (netif_carrier_ok(dev))
2967                         team_port_change_check(port, true);
2968                 break;
2969         case NETDEV_DOWN:
2970                 team_port_change_check(port, false);
2971                 break;
2972         case NETDEV_CHANGE:
2973                 if (netif_running(port->dev))
2974                         team_port_change_check(port,
2975                                                !!netif_carrier_ok(port->dev));
2976                 break;
2977         case NETDEV_UNREGISTER:
2978                 team_del_slave(port->team->dev, dev);
2979                 break;
2980         case NETDEV_FEAT_CHANGE:
2981                 team_compute_features(port->team);
2982                 break;
2983         case NETDEV_PRECHANGEMTU:
2984                 /* Forbid to change mtu of underlaying device */
2985                 if (!port->team->port_mtu_change_allowed)
2986                         return NOTIFY_BAD;
2987                 break;
2988         case NETDEV_PRE_TYPE_CHANGE:
2989                 /* Forbid to change type of underlaying device */
2990                 return NOTIFY_BAD;
2991         case NETDEV_RESEND_IGMP:
2992                 /* Propagate to master device */
2993                 call_netdevice_notifiers(event, port->team->dev);
2994                 break;
2995         }
2996         return NOTIFY_DONE;
2997 }
2998
2999 static struct notifier_block team_notifier_block __read_mostly = {
3000         .notifier_call = team_device_event,
3001 };
3002
3003
3004 /***********************
3005  * Module init and exit
3006  ***********************/
3007
3008 static int __init team_module_init(void)
3009 {
3010         int err;
3011
3012         register_netdevice_notifier(&team_notifier_block);
3013
3014         err = rtnl_link_register(&team_link_ops);
3015         if (err)
3016                 goto err_rtnl_reg;
3017
3018         err = team_nl_init();
3019         if (err)
3020                 goto err_nl_init;
3021
3022         return 0;
3023
3024 err_nl_init:
3025         rtnl_link_unregister(&team_link_ops);
3026
3027 err_rtnl_reg:
3028         unregister_netdevice_notifier(&team_notifier_block);
3029
3030         return err;
3031 }
3032
3033 static void __exit team_module_exit(void)
3034 {
3035         team_nl_fini();
3036         rtnl_link_unregister(&team_link_ops);
3037         unregister_netdevice_notifier(&team_notifier_block);
3038 }
3039
3040 module_init(team_module_init);
3041 module_exit(team_module_exit);
3042
3043 MODULE_LICENSE("GPL v2");
3044 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
3045 MODULE_DESCRIPTION("Ethernet team device driver");
3046 MODULE_ALIAS_RTNL_LINK(DRV_NAME);