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/if_vlan.h>
  22 #include <linux/if_arp.h>
  23 #include <linux/socket.h>
  24 #include <linux/etherdevice.h>
  25 #include <linux/rtnetlink.h>
  26 #include <net/rtnetlink.h>
  27 #include <net/genetlink.h>
  28 #include <net/netlink.h>
  29 #include <linux/if_team.h>
  30
  31 #define DRV_NAME "team"
  32
  33
  34 /**********
  35  * Helpers
  36  **********/
  37
  38 #define team_port_exists(dev) (dev->priv_flags & IFF_TEAM_PORT)
  39
  40 static struct team_port *team_port_get_rcu(const struct net_device *dev)
  41 {
  42         struct team_port *port = rcu_dereference(dev->rx_handler_data);
  43
  44         return team_port_exists(dev) ? port : NULL;
  45 }
  46
  47 static struct team_port *team_port_get_rtnl(const struct net_device *dev)
  48 {
  49         struct team_port *port = rtnl_dereference(dev->rx_handler_data);
  50
  51         return team_port_exists(dev) ? port : NULL;
  52 }
  53
  54 /*
  55  * Since the ability to change mac address for open port device is tested in
  56  * team_port_add, this function can be called without control of return value
  57  */
  58 static int __set_port_mac(struct net_device *port_dev,
  59                           const unsigned char *dev_addr)
  60 {
  61         struct sockaddr addr;
  62
  63         memcpy(addr.sa_data, dev_addr, ETH_ALEN);
  64         addr.sa_family = ARPHRD_ETHER;
  65         return dev_set_mac_address(port_dev, &addr);
  66 }
  67
  68 static int team_port_set_orig_mac(struct team_port *port)
  69 {
  70         return __set_port_mac(port->dev, port->orig.dev_addr);
  71 }
  72
  73 int team_port_set_team_mac(struct team_port *port)
  74 {
  75         return __set_port_mac(port->dev, port->team->dev->dev_addr);
  76 }
  77 EXPORT_SYMBOL(team_port_set_team_mac);
  78
  79 static void team_refresh_port_linkup(struct team_port *port)
  80 {
  81         port->linkup = port->user.linkup_enabled ? port->user.linkup :
  82                                                    port->state.linkup;
  83 }
  84
  85
  86 /*******************
  87  * Options handling
  88  *******************/
  89
  90 struct team_option_inst { /* One for each option instance */
  91         struct list_head list;
  92         struct team_option *option;
  93         struct team_option_inst_info info;
  94         bool changed;
  95         bool removed;
  96 };
  97
  98 static struct team_option *__team_find_option(struct team *team,
  99                                               const char *opt_name)
 100 {
 101         struct team_option *option;
 102
 103         list_for_each_entry(option, &team->option_list, list) {
 104                 if (strcmp(option->name, opt_name) == 0)
 105                         return option;
 106         }
 107         return NULL;
 108 }
 109
 110 static void __team_option_inst_del(struct team_option_inst *opt_inst)
 111 {
 112         list_del(&opt_inst->list);
 113         kfree(opt_inst);
 114 }
 115
 116 static void __team_option_inst_del_option(struct team *team,
 117                                           struct team_option *option)
 118 {
 119         struct team_option_inst *opt_inst, *tmp;
 120
 121         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 122                 if (opt_inst->option == option)
 123                         __team_option_inst_del(opt_inst);
 124         }
 125 }
 126
 127 static int __team_option_inst_add(struct team *team, struct team_option *option,
 128                                   struct team_port *port)
 129 {
 130         struct team_option_inst *opt_inst;
 131         unsigned int array_size;
 132         unsigned int i;
 133         int err;
 134
 135         array_size = option->array_size;
 136         if (!array_size)
 137                 array_size = 1; /* No array but still need one instance */
 138
 139         for (i = 0; i < array_size; i++) {
 140                 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL);
 141                 if (!opt_inst)
 142                         return -ENOMEM;
 143                 opt_inst->option = option;
 144                 opt_inst->info.port = port;
 145                 opt_inst->info.array_index = i;
 146                 opt_inst->changed = true;
 147                 opt_inst->removed = false;
 148                 list_add_tail(&opt_inst->list, &team->option_inst_list);
 149                 if (option->init) {
 150                         err = option->init(team, &opt_inst->info);
 151                         if (err)
 152                                 return err;
 153                 }
 154
 155         }
 156         return 0;
 157 }
 158
 159 static int __team_option_inst_add_option(struct team *team,
 160                                          struct team_option *option)
 161 {
 162         struct team_port *port;
 163         int err;
 164
 165         if (!option->per_port) {
 166                 err = __team_option_inst_add(team, option, 0);
 167                 if (err)
 168                         goto inst_del_option;
 169         }
 170
 171         list_for_each_entry(port, &team->port_list, list) {
 172                 err = __team_option_inst_add(team, option, port);
 173                 if (err)
 174                         goto inst_del_option;
 175         }
 176         return 0;
 177
 178 inst_del_option:
 179         __team_option_inst_del_option(team, option);
 180         return err;
 181 }
 182
 183 static void __team_option_inst_mark_removed_option(struct team *team,
 184                                                    struct team_option *option)
 185 {
 186         struct team_option_inst *opt_inst;
 187
 188         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 189                 if (opt_inst->option == option) {
 190                         opt_inst->changed = true;
 191                         opt_inst->removed = true;
 192                 }
 193         }
 194 }
 195
 196 static void __team_option_inst_del_port(struct team *team,
 197                                         struct team_port *port)
 198 {
 199         struct team_option_inst *opt_inst, *tmp;
 200
 201         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 202                 if (opt_inst->option->per_port &&
 203                     opt_inst->info.port == port)
 204                         __team_option_inst_del(opt_inst);
 205         }
 206 }
 207
 208 static int __team_option_inst_add_port(struct team *team,
 209                                        struct team_port *port)
 210 {
 211         struct team_option *option;
 212         int err;
 213
 214         list_for_each_entry(option, &team->option_list, list) {
 215                 if (!option->per_port)
 216                         continue;
 217                 err = __team_option_inst_add(team, option, port);
 218                 if (err)
 219                         goto inst_del_port;
 220         }
 221         return 0;
 222
 223 inst_del_port:
 224         __team_option_inst_del_port(team, port);
 225         return err;
 226 }
 227
 228 static void __team_option_inst_mark_removed_port(struct team *team,
 229                                                  struct team_port *port)
 230 {
 231         struct team_option_inst *opt_inst;
 232
 233         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 234                 if (opt_inst->info.port == port) {
 235                         opt_inst->changed = true;
 236                         opt_inst->removed = true;
 237                 }
 238         }
 239 }
 240
 241 static int __team_options_register(struct team *team,
 242                                    const struct team_option *option,
 243                                    size_t option_count)
 244 {
 245         int i;
 246         struct team_option **dst_opts;
 247         int err;
 248
 249         dst_opts = kzalloc(sizeof(struct team_option *) * option_count,
 250                            GFP_KERNEL);
 251         if (!dst_opts)
 252                 return -ENOMEM;
 253         for (i = 0; i < option_count; i++, option++) {
 254                 if (__team_find_option(team, option->name)) {
 255                         err = -EEXIST;
 256                         goto alloc_rollback;
 257                 }
 258                 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
 259                 if (!dst_opts[i]) {
 260                         err = -ENOMEM;
 261                         goto alloc_rollback;
 262                 }
 263         }
 264
 265         for (i = 0; i < option_count; i++) {
 266                 err = __team_option_inst_add_option(team, dst_opts[i]);
 267                 if (err)
 268                         goto inst_rollback;
 269                 list_add_tail(&dst_opts[i]->list, &team->option_list);
 270         }
 271
 272         kfree(dst_opts);
 273         return 0;
 274
 275 inst_rollback:
 276         for (i--; i >= 0; i--)
 277                 __team_option_inst_del_option(team, dst_opts[i]);
 278
 279         i = option_count - 1;
 280 alloc_rollback:
 281         for (i--; i >= 0; i--)
 282                 kfree(dst_opts[i]);
 283
 284         kfree(dst_opts);
 285         return err;
 286 }
 287
 288 static void __team_options_mark_removed(struct team *team,
 289                                         const struct team_option *option,
 290                                         size_t option_count)
 291 {
 292         int i;
 293
 294         for (i = 0; i < option_count; i++, option++) {
 295                 struct team_option *del_opt;
 296
 297                 del_opt = __team_find_option(team, option->name);
 298                 if (del_opt)
 299                         __team_option_inst_mark_removed_option(team, del_opt);
 300         }
 301 }
 302
 303 static void __team_options_unregister(struct team *team,
 304                                       const struct team_option *option,
 305                                       size_t option_count)
 306 {
 307         int i;
 308
 309         for (i = 0; i < option_count; i++, option++) {
 310                 struct team_option *del_opt;
 311
 312                 del_opt = __team_find_option(team, option->name);
 313                 if (del_opt) {
 314                         __team_option_inst_del_option(team, del_opt);
 315                         list_del(&del_opt->list);
 316                         kfree(del_opt);
 317                 }
 318         }
 319 }
 320
 321 static void __team_options_change_check(struct team *team);
 322
 323 int team_options_register(struct team *team,
 324                           const struct team_option *option,
 325                           size_t option_count)
 326 {
 327         int err;
 328
 329         err = __team_options_register(team, option, option_count);
 330         if (err)
 331                 return err;
 332         __team_options_change_check(team);
 333         return 0;
 334 }
 335 EXPORT_SYMBOL(team_options_register);
 336
 337 void team_options_unregister(struct team *team,
 338                              const struct team_option *option,
 339                              size_t option_count)
 340 {
 341         __team_options_mark_removed(team, option, option_count);
 342         __team_options_change_check(team);
 343         __team_options_unregister(team, option, option_count);
 344 }
 345 EXPORT_SYMBOL(team_options_unregister);
 346
 347 static int team_option_port_add(struct team *team, struct team_port *port)
 348 {
 349         int err;
 350
 351         err = __team_option_inst_add_port(team, port);
 352         if (err)
 353                 return err;
 354         __team_options_change_check(team);
 355         return 0;
 356 }
 357
 358 static void team_option_port_del(struct team *team, struct team_port *port)
 359 {
 360         __team_option_inst_mark_removed_port(team, port);
 361         __team_options_change_check(team);
 362         __team_option_inst_del_port(team, port);
 363 }
 364
 365 static int team_option_get(struct team *team,
 366                            struct team_option_inst *opt_inst,
 367                            struct team_gsetter_ctx *ctx)
 368 {
 369         if (!opt_inst->option->getter)
 370                 return -EOPNOTSUPP;
 371         return opt_inst->option->getter(team, ctx);
 372 }
 373
 374 static int team_option_set(struct team *team,
 375                            struct team_option_inst *opt_inst,
 376                            struct team_gsetter_ctx *ctx)
 377 {
 378         int err;
 379
 380         if (!opt_inst->option->setter)
 381                 return -EOPNOTSUPP;
 382         err = opt_inst->option->setter(team, ctx);
 383         if (err)
 384                 return err;
 385
 386         opt_inst->changed = true;
 387         __team_options_change_check(team);
 388         return err;
 389 }
 390
 391 void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info)
 392 {
 393         struct team_option_inst *opt_inst;
 394
 395         opt_inst = container_of(opt_inst_info, struct team_option_inst, info);
 396         opt_inst->changed = true;
 397 }
 398 EXPORT_SYMBOL(team_option_inst_set_change);
 399
 400 void team_options_change_check(struct team *team)
 401 {
 402         __team_options_change_check(team);
 403 }
 404 EXPORT_SYMBOL(team_options_change_check);
 405
 406
 407 /****************
 408  * Mode handling
 409  ****************/
 410
 411 static LIST_HEAD(mode_list);
 412 static DEFINE_SPINLOCK(mode_list_lock);
 413
 414 struct team_mode_item {
 415         struct list_head list;
 416         const struct team_mode *mode;
 417 };
 418
 419 static struct team_mode_item *__find_mode(const char *kind)
 420 {
 421         struct team_mode_item *mitem;
 422
 423         list_for_each_entry(mitem, &mode_list, list) {
 424                 if (strcmp(mitem->mode->kind, kind) == 0)
 425                         return mitem;
 426         }
 427         return NULL;
 428 }
 429
 430 static bool is_good_mode_name(const char *name)
 431 {
 432         while (*name != '\0') {
 433                 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
 434                         return false;
 435                 name++;
 436         }
 437         return true;
 438 }
 439
 440 int team_mode_register(const struct team_mode *mode)
 441 {
 442         int err = 0;
 443         struct team_mode_item *mitem;
 444
 445         if (!is_good_mode_name(mode->kind) ||
 446             mode->priv_size > TEAM_MODE_PRIV_SIZE)
 447                 return -EINVAL;
 448
 449         mitem = kmalloc(sizeof(*mitem), GFP_KERNEL);
 450         if (!mitem)
 451                 return -ENOMEM;
 452
 453         spin_lock(&mode_list_lock);
 454         if (__find_mode(mode->kind)) {
 455                 err = -EEXIST;
 456                 kfree(mitem);
 457                 goto unlock;
 458         }
 459         mitem->mode = mode;
 460         list_add_tail(&mitem->list, &mode_list);
 461 unlock:
 462         spin_unlock(&mode_list_lock);
 463         return err;
 464 }
 465 EXPORT_SYMBOL(team_mode_register);
 466
 467 void team_mode_unregister(const struct team_mode *mode)
 468 {
 469         struct team_mode_item *mitem;
 470
 471         spin_lock(&mode_list_lock);
 472         mitem = __find_mode(mode->kind);
 473         if (mitem) {
 474                 list_del_init(&mitem->list);
 475                 kfree(mitem);
 476         }
 477         spin_unlock(&mode_list_lock);
 478 }
 479 EXPORT_SYMBOL(team_mode_unregister);
 480
 481 static const struct team_mode *team_mode_get(const char *kind)
 482 {
 483         struct team_mode_item *mitem;
 484         const struct team_mode *mode = 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         return mode;
 502 }
 503
 504 static void team_mode_put(const struct team_mode *mode)
 505 {
 506         module_put(mode->owner);
 507 }
 508
 509 static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
 510 {
 511         dev_kfree_skb_any(skb);
 512         return false;
 513 }
 514
 515 rx_handler_result_t team_dummy_receive(struct team *team,
 516                                        struct team_port *port,
 517                                        struct sk_buff *skb)
 518 {
 519         return RX_HANDLER_ANOTHER;
 520 }
 521
 522 static const struct team_mode __team_no_mode = {
 523         .kind           = "*NOMODE*",
 524 };
 525
 526 static bool team_is_mode_set(struct team *team)
 527 {
 528         return team->mode != &__team_no_mode;
 529 }
 530
 531 static void team_set_no_mode(struct team *team)
 532 {
 533         team->mode = &__team_no_mode;
 534 }
 535
 536 static void team_adjust_ops(struct team *team)
 537 {
 538         /*
 539          * To avoid checks in rx/tx skb paths, ensure here that non-null and
 540          * correct ops are always set.
 541          */
 542
 543         if (list_empty(&team->port_list) ||
 544             !team_is_mode_set(team) || !team->mode->ops->transmit)
 545                 team->ops.transmit = team_dummy_transmit;
 546         else
 547                 team->ops.transmit = team->mode->ops->transmit;
 548
 549         if (list_empty(&team->port_list) ||
 550             !team_is_mode_set(team) || !team->mode->ops->receive)
 551                 team->ops.receive = team_dummy_receive;
 552         else
 553                 team->ops.receive = team->mode->ops->receive;
 554 }
 555
 556 /*
 557  * We can benefit from the fact that it's ensured no port is present
 558  * at the time of mode change. Therefore no packets are in fly so there's no
 559  * need to set mode operations in any special way.
 560  */
 561 static int __team_change_mode(struct team *team,
 562                               const struct team_mode *new_mode)
 563 {
 564         /* Check if mode was previously set and do cleanup if so */
 565         if (team_is_mode_set(team)) {
 566                 void (*exit_op)(struct team *team) = team->ops.exit;
 567
 568                 /* Clear ops area so no callback is called any longer */
 569                 memset(&team->ops, 0, sizeof(struct team_mode_ops));
 570                 team_adjust_ops(team);
 571
 572                 if (exit_op)
 573                         exit_op(team);
 574                 team_mode_put(team->mode);
 575                 team_set_no_mode(team);
 576                 /* zero private data area */
 577                 memset(&team->mode_priv, 0,
 578                        sizeof(struct team) - offsetof(struct team, mode_priv));
 579         }
 580
 581         if (!new_mode)
 582                 return 0;
 583
 584         if (new_mode->ops->init) {
 585                 int err;
 586
 587                 err = new_mode->ops->init(team);
 588                 if (err)
 589                         return err;
 590         }
 591
 592         team->mode = new_mode;
 593         memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
 594         team_adjust_ops(team);
 595
 596         return 0;
 597 }
 598
 599 static int team_change_mode(struct team *team, const char *kind)
 600 {
 601         const struct team_mode *new_mode;
 602         struct net_device *dev = team->dev;
 603         int err;
 604
 605         if (!list_empty(&team->port_list)) {
 606                 netdev_err(dev, "No ports can be present during mode change\n");
 607                 return -EBUSY;
 608         }
 609
 610         if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) {
 611                 netdev_err(dev, "Unable to change to the same mode the team is in\n");
 612                 return -EINVAL;
 613         }
 614
 615         new_mode = team_mode_get(kind);
 616         if (!new_mode) {
 617                 netdev_err(dev, "Mode \"%s\" not found\n", kind);
 618                 return -EINVAL;
 619         }
 620
 621         err = __team_change_mode(team, new_mode);
 622         if (err) {
 623                 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
 624                 team_mode_put(new_mode);
 625                 return err;
 626         }
 627
 628         netdev_info(dev, "Mode changed to \"%s\"\n", kind);
 629         return 0;
 630 }
 631
 632
 633 /************************
 634  * Rx path frame handler
 635  ************************/
 636
 637 static bool team_port_enabled(struct team_port *port);
 638
 639 /* note: already called with rcu_read_lock */
 640 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
 641 {
 642         struct sk_buff *skb = *pskb;
 643         struct team_port *port;
 644         struct team *team;
 645         rx_handler_result_t res;
 646
 647         skb = skb_share_check(skb, GFP_ATOMIC);
 648         if (!skb)
 649                 return RX_HANDLER_CONSUMED;
 650
 651         *pskb = skb;
 652
 653         port = team_port_get_rcu(skb->dev);
 654         team = port->team;
 655         if (!team_port_enabled(port)) {
 656                 /* allow exact match delivery for disabled ports */
 657                 res = RX_HANDLER_EXACT;
 658         } else {
 659                 res = team->ops.receive(team, port, skb);
 660         }
 661         if (res == RX_HANDLER_ANOTHER) {
 662                 struct team_pcpu_stats *pcpu_stats;
 663
 664                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
 665                 u64_stats_update_begin(&pcpu_stats->syncp);
 666                 pcpu_stats->rx_packets++;
 667                 pcpu_stats->rx_bytes += skb->len;
 668                 if (skb->pkt_type == PACKET_MULTICAST)
 669                         pcpu_stats->rx_multicast++;
 670                 u64_stats_update_end(&pcpu_stats->syncp);
 671
 672                 skb->dev = team->dev;
 673         } else {
 674                 this_cpu_inc(team->pcpu_stats->rx_dropped);
 675         }
 676
 677         return res;
 678 }
 679
 680
 681 /****************
 682  * Port handling
 683  ****************/
 684
 685 static bool team_port_find(const struct team *team,
 686                            const struct team_port *port)
 687 {
 688         struct team_port *cur;
 689
 690         list_for_each_entry(cur, &team->port_list, list)
 691                 if (cur == port)
 692                         return true;
 693         return false;
 694 }
 695
 696 static bool team_port_enabled(struct team_port *port)
 697 {
 698         return port->index != -1;
 699 }
 700
 701 /*
 702  * Enable/disable port by adding to enabled port hashlist and setting
 703  * port->index (Might be racy so reader could see incorrect ifindex when
 704  * processing a flying packet, but that is not a problem). Write guarded
 705  * by team->lock.
 706  */
 707 static void team_port_enable(struct team *team,
 708                              struct team_port *port)
 709 {
 710         if (team_port_enabled(port))
 711                 return;
 712         port->index = team->en_port_count++;
 713         hlist_add_head_rcu(&port->hlist,
 714                            team_port_index_hash(team, port->index));
 715 }
 716
 717 static void __reconstruct_port_hlist(struct team *team, int rm_index)
 718 {
 719         int i;
 720         struct team_port *port;
 721
 722         for (i = rm_index + 1; i < team->en_port_count; i++) {
 723                 port = team_get_port_by_index(team, i);
 724                 hlist_del_rcu(&port->hlist);
 725                 port->index--;
 726                 hlist_add_head_rcu(&port->hlist,
 727                                    team_port_index_hash(team, port->index));
 728         }
 729 }
 730
 731 static void team_port_disable(struct team *team,
 732                               struct team_port *port)
 733 {
 734         int rm_index = port->index;
 735
 736         if (!team_port_enabled(port))
 737                 return;
 738         hlist_del_rcu(&port->hlist);
 739         __reconstruct_port_hlist(team, rm_index);
 740         team->en_port_count--;
 741         port->index = -1;
 742 }
 743
 744 #define TEAM_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \
 745                             NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
 746                             NETIF_F_HIGHDMA | NETIF_F_LRO)
 747
 748 static void __team_compute_features(struct team *team)
 749 {
 750         struct team_port *port;
 751         u32 vlan_features = TEAM_VLAN_FEATURES;
 752         unsigned short max_hard_header_len = ETH_HLEN;
 753
 754         list_for_each_entry(port, &team->port_list, list) {
 755                 vlan_features = netdev_increment_features(vlan_features,
 756                                         port->dev->vlan_features,
 757                                         TEAM_VLAN_FEATURES);
 758
 759                 if (port->dev->hard_header_len > max_hard_header_len)
 760                         max_hard_header_len = port->dev->hard_header_len;
 761         }
 762
 763         team->dev->vlan_features = vlan_features;
 764         team->dev->hard_header_len = max_hard_header_len;
 765
 766         netdev_change_features(team->dev);
 767 }
 768
 769 static void team_compute_features(struct team *team)
 770 {
 771         mutex_lock(&team->lock);
 772         __team_compute_features(team);
 773         mutex_unlock(&team->lock);
 774 }
 775
 776 static int team_port_enter(struct team *team, struct team_port *port)
 777 {
 778         int err = 0;
 779
 780         dev_hold(team->dev);
 781         port->dev->priv_flags |= IFF_TEAM_PORT;
 782         if (team->ops.port_enter) {
 783                 err = team->ops.port_enter(team, port);
 784                 if (err) {
 785                         netdev_err(team->dev, "Device %s failed to enter team mode\n",
 786                                    port->dev->name);
 787                         goto err_port_enter;
 788                 }
 789         }
 790
 791         return 0;
 792
 793 err_port_enter:
 794         port->dev->priv_flags &= ~IFF_TEAM_PORT;
 795         dev_put(team->dev);
 796
 797         return err;
 798 }
 799
 800 static void team_port_leave(struct team *team, struct team_port *port)
 801 {
 802         if (team->ops.port_leave)
 803                 team->ops.port_leave(team, port);
 804         port->dev->priv_flags &= ~IFF_TEAM_PORT;
 805         dev_put(team->dev);
 806 }
 807
 808 static void __team_port_change_check(struct team_port *port, bool linkup);
 809
 810 static int team_port_add(struct team *team, struct net_device *port_dev)
 811 {
 812         struct net_device *dev = team->dev;
 813         struct team_port *port;
 814         char *portname = port_dev->name;
 815         int err;
 816
 817         if (port_dev->flags & IFF_LOOPBACK ||
 818             port_dev->type != ARPHRD_ETHER) {
 819                 netdev_err(dev, "Device %s is of an unsupported type\n",
 820                            portname);
 821                 return -EINVAL;
 822         }
 823
 824         if (team_port_exists(port_dev)) {
 825                 netdev_err(dev, "Device %s is already a port "
 826                                 "of a team device\n", portname);
 827                 return -EBUSY;
 828         }
 829
 830         if (port_dev->flags & IFF_UP) {
 831                 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
 832                            portname);
 833                 return -EBUSY;
 834         }
 835
 836         port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
 837                        GFP_KERNEL);
 838         if (!port)
 839                 return -ENOMEM;
 840
 841         port->dev = port_dev;
 842         port->team = team;
 843
 844         port->orig.mtu = port_dev->mtu;
 845         err = dev_set_mtu(port_dev, dev->mtu);
 846         if (err) {
 847                 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
 848                 goto err_set_mtu;
 849         }
 850
 851         memcpy(port->orig.dev_addr, port_dev->dev_addr, ETH_ALEN);
 852
 853         err = team_port_enter(team, port);
 854         if (err) {
 855                 netdev_err(dev, "Device %s failed to enter team mode\n",
 856                            portname);
 857                 goto err_port_enter;
 858         }
 859
 860         err = dev_open(port_dev);
 861         if (err) {
 862                 netdev_dbg(dev, "Device %s opening failed\n",
 863                            portname);
 864                 goto err_dev_open;
 865         }
 866
 867         err = vlan_vids_add_by_dev(port_dev, dev);
 868         if (err) {
 869                 netdev_err(dev, "Failed to add vlan ids to device %s\n",
 870                                 portname);
 871                 goto err_vids_add;
 872         }
 873
 874         err = netdev_set_master(port_dev, dev);
 875         if (err) {
 876                 netdev_err(dev, "Device %s failed to set master\n", portname);
 877                 goto err_set_master;
 878         }
 879
 880         err = netdev_rx_handler_register(port_dev, team_handle_frame,
 881                                          port);
 882         if (err) {
 883                 netdev_err(dev, "Device %s failed to register rx_handler\n",
 884                            portname);
 885                 goto err_handler_register;
 886         }
 887
 888         err = team_option_port_add(team, port);
 889         if (err) {
 890                 netdev_err(dev, "Device %s failed to add per-port options\n",
 891                            portname);
 892                 goto err_option_port_add;
 893         }
 894
 895         port->index = -1;
 896         team_port_enable(team, port);
 897         list_add_tail_rcu(&port->list, &team->port_list);
 898         team_adjust_ops(team);
 899         __team_compute_features(team);
 900         __team_port_change_check(port, !!netif_carrier_ok(port_dev));
 901
 902         netdev_info(dev, "Port device %s added\n", portname);
 903
 904         return 0;
 905
 906 err_option_port_add:
 907         netdev_rx_handler_unregister(port_dev);
 908
 909 err_handler_register:
 910         netdev_set_master(port_dev, NULL);
 911
 912 err_set_master:
 913         vlan_vids_del_by_dev(port_dev, dev);
 914
 915 err_vids_add:
 916         dev_close(port_dev);
 917
 918 err_dev_open:
 919         team_port_leave(team, port);
 920         team_port_set_orig_mac(port);
 921
 922 err_port_enter:
 923         dev_set_mtu(port_dev, port->orig.mtu);
 924
 925 err_set_mtu:
 926         kfree(port);
 927
 928         return err;
 929 }
 930
 931 static int team_port_del(struct team *team, struct net_device *port_dev)
 932 {
 933         struct net_device *dev = team->dev;
 934         struct team_port *port;
 935         char *portname = port_dev->name;
 936
 937         port = team_port_get_rtnl(port_dev);
 938         if (!port || !team_port_find(team, port)) {
 939                 netdev_err(dev, "Device %s does not act as a port of this team\n",
 940                            portname);
 941                 return -ENOENT;
 942         }
 943
 944         port->removed = true;
 945         __team_port_change_check(port, false);
 946         team_port_disable(team, port);
 947         list_del_rcu(&port->list);
 948         team_adjust_ops(team);
 949         team_option_port_del(team, port);
 950         netdev_rx_handler_unregister(port_dev);
 951         netdev_set_master(port_dev, NULL);
 952         vlan_vids_del_by_dev(port_dev, dev);
 953         dev_close(port_dev);
 954         team_port_leave(team, port);
 955         team_port_set_orig_mac(port);
 956         dev_set_mtu(port_dev, port->orig.mtu);
 957         synchronize_rcu();
 958         kfree(port);
 959         netdev_info(dev, "Port device %s removed\n", portname);
 960         __team_compute_features(team);
 961
 962         return 0;
 963 }
 964
 965
 966 /*****************
 967  * Net device ops
 968  *****************/
 969
 970 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
 971 {
 972         ctx->data.str_val = team->mode->kind;
 973         return 0;
 974 }
 975
 976 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
 977 {
 978         return team_change_mode(team, ctx->data.str_val);
 979 }
 980
 981 static int team_port_en_option_get(struct team *team,
 982                                    struct team_gsetter_ctx *ctx)
 983 {
 984         struct team_port *port = ctx->info->port;
 985
 986         ctx->data.bool_val = team_port_enabled(port);
 987         return 0;
 988 }
 989
 990 static int team_port_en_option_set(struct team *team,
 991                                    struct team_gsetter_ctx *ctx)
 992 {
 993         struct team_port *port = ctx->info->port;
 994
 995         if (ctx->data.bool_val)
 996                 team_port_enable(team, port);
 997         else
 998                 team_port_disable(team, port);
 999         return 0;
1000 }
1001
1002 static int team_user_linkup_option_get(struct team *team,
1003                                        struct team_gsetter_ctx *ctx)
1004 {
1005         struct team_port *port = ctx->info->port;
1006
1007         ctx->data.bool_val = port->user.linkup;
1008         return 0;
1009 }
1010
1011 static int team_user_linkup_option_set(struct team *team,
1012                                        struct team_gsetter_ctx *ctx)
1013 {
1014         struct team_port *port = ctx->info->port;
1015
1016         port->user.linkup = ctx->data.bool_val;
1017         team_refresh_port_linkup(port);
1018         return 0;
1019 }
1020
1021 static int team_user_linkup_en_option_get(struct team *team,
1022                                           struct team_gsetter_ctx *ctx)
1023 {
1024         struct team_port *port = ctx->info->port;
1025
1026         ctx->data.bool_val = port->user.linkup_enabled;
1027         return 0;
1028 }
1029
1030 static int team_user_linkup_en_option_set(struct team *team,
1031                                           struct team_gsetter_ctx *ctx)
1032 {
1033         struct team_port *port = ctx->info->port;
1034
1035         port->user.linkup_enabled = ctx->data.bool_val;
1036         team_refresh_port_linkup(port);
1037         return 0;
1038 }
1039
1040 static const struct team_option team_options[] = {
1041         {
1042                 .name = "mode",
1043                 .type = TEAM_OPTION_TYPE_STRING,
1044                 .getter = team_mode_option_get,
1045                 .setter = team_mode_option_set,
1046         },
1047         {
1048                 .name = "enabled",
1049                 .type = TEAM_OPTION_TYPE_BOOL,
1050                 .per_port = true,
1051                 .getter = team_port_en_option_get,
1052                 .setter = team_port_en_option_set,
1053         },
1054         {
1055                 .name = "user_linkup",
1056                 .type = TEAM_OPTION_TYPE_BOOL,
1057                 .per_port = true,
1058                 .getter = team_user_linkup_option_get,
1059                 .setter = team_user_linkup_option_set,
1060         },
1061         {
1062                 .name = "user_linkup_enabled",
1063                 .type = TEAM_OPTION_TYPE_BOOL,
1064                 .per_port = true,
1065                 .getter = team_user_linkup_en_option_get,
1066                 .setter = team_user_linkup_en_option_set,
1067         },
1068 };
1069
1070 static int team_init(struct net_device *dev)
1071 {
1072         struct team *team = netdev_priv(dev);
1073         int i;
1074         int err;
1075
1076         team->dev = dev;
1077         mutex_init(&team->lock);
1078         team_set_no_mode(team);
1079
1080         team->pcpu_stats = alloc_percpu(struct team_pcpu_stats);
1081         if (!team->pcpu_stats)
1082                 return -ENOMEM;
1083
1084         for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1085                 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1086         INIT_LIST_HEAD(&team->port_list);
1087
1088         team_adjust_ops(team);
1089
1090         INIT_LIST_HEAD(&team->option_list);
1091         INIT_LIST_HEAD(&team->option_inst_list);
1092         err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1093         if (err)
1094                 goto err_options_register;
1095         netif_carrier_off(dev);
1096
1097         return 0;
1098
1099 err_options_register:
1100         free_percpu(team->pcpu_stats);
1101
1102         return err;
1103 }
1104
1105 static void team_uninit(struct net_device *dev)
1106 {
1107         struct team *team = netdev_priv(dev);
1108         struct team_port *port;
1109         struct team_port *tmp;
1110
1111         mutex_lock(&team->lock);
1112         list_for_each_entry_safe(port, tmp, &team->port_list, list)
1113                 team_port_del(team, port->dev);
1114
1115         __team_change_mode(team, NULL); /* cleanup */
1116         __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1117         mutex_unlock(&team->lock);
1118 }
1119
1120 static void team_destructor(struct net_device *dev)
1121 {
1122         struct team *team = netdev_priv(dev);
1123
1124         free_percpu(team->pcpu_stats);
1125         free_netdev(dev);
1126 }
1127
1128 static int team_open(struct net_device *dev)
1129 {
1130         netif_carrier_on(dev);
1131         return 0;
1132 }
1133
1134 static int team_close(struct net_device *dev)
1135 {
1136         netif_carrier_off(dev);
1137         return 0;
1138 }
1139
1140 /*
1141  * note: already called with rcu_read_lock
1142  */
1143 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1144 {
1145         struct team *team = netdev_priv(dev);
1146         bool tx_success = false;
1147         unsigned int len = skb->len;
1148
1149         tx_success = team->ops.transmit(team, skb);
1150         if (tx_success) {
1151                 struct team_pcpu_stats *pcpu_stats;
1152
1153                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1154                 u64_stats_update_begin(&pcpu_stats->syncp);
1155                 pcpu_stats->tx_packets++;
1156                 pcpu_stats->tx_bytes += len;
1157                 u64_stats_update_end(&pcpu_stats->syncp);
1158         } else {
1159                 this_cpu_inc(team->pcpu_stats->tx_dropped);
1160         }
1161
1162         return NETDEV_TX_OK;
1163 }
1164
1165 static void team_change_rx_flags(struct net_device *dev, int change)
1166 {
1167         struct team *team = netdev_priv(dev);
1168         struct team_port *port;
1169         int inc;
1170
1171         rcu_read_lock();
1172         list_for_each_entry_rcu(port, &team->port_list, list) {
1173                 if (change & IFF_PROMISC) {
1174                         inc = dev->flags & IFF_PROMISC ? 1 : -1;
1175                         dev_set_promiscuity(port->dev, inc);
1176                 }
1177                 if (change & IFF_ALLMULTI) {
1178                         inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1179                         dev_set_allmulti(port->dev, inc);
1180                 }
1181         }
1182         rcu_read_unlock();
1183 }
1184
1185 static void team_set_rx_mode(struct net_device *dev)
1186 {
1187         struct team *team = netdev_priv(dev);
1188         struct team_port *port;
1189
1190         rcu_read_lock();
1191         list_for_each_entry_rcu(port, &team->port_list, list) {
1192                 dev_uc_sync(port->dev, dev);
1193                 dev_mc_sync(port->dev, dev);
1194         }
1195         rcu_read_unlock();
1196 }
1197
1198 static int team_set_mac_address(struct net_device *dev, void *p)
1199 {
1200         struct team *team = netdev_priv(dev);
1201         struct team_port *port;
1202         struct sockaddr *addr = p;
1203
1204         dev->addr_assign_type &= ~NET_ADDR_RANDOM;
1205         memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
1206         rcu_read_lock();
1207         list_for_each_entry_rcu(port, &team->port_list, list)
1208                 if (team->ops.port_change_mac)
1209                         team->ops.port_change_mac(team, port);
1210         rcu_read_unlock();
1211         return 0;
1212 }
1213
1214 static int team_change_mtu(struct net_device *dev, int new_mtu)
1215 {
1216         struct team *team = netdev_priv(dev);
1217         struct team_port *port;
1218         int err;
1219
1220         /*
1221          * Alhough this is reader, it's guarded by team lock. It's not possible
1222          * to traverse list in reverse under rcu_read_lock
1223          */
1224         mutex_lock(&team->lock);
1225         list_for_each_entry(port, &team->port_list, list) {
1226                 err = dev_set_mtu(port->dev, new_mtu);
1227                 if (err) {
1228                         netdev_err(dev, "Device %s failed to change mtu",
1229                                    port->dev->name);
1230                         goto unwind;
1231                 }
1232         }
1233         mutex_unlock(&team->lock);
1234
1235         dev->mtu = new_mtu;
1236
1237         return 0;
1238
1239 unwind:
1240         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1241                 dev_set_mtu(port->dev, dev->mtu);
1242         mutex_unlock(&team->lock);
1243
1244         return err;
1245 }
1246
1247 static struct rtnl_link_stats64 *
1248 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1249 {
1250         struct team *team = netdev_priv(dev);
1251         struct team_pcpu_stats *p;
1252         u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1253         u32 rx_dropped = 0, tx_dropped = 0;
1254         unsigned int start;
1255         int i;
1256
1257         for_each_possible_cpu(i) {
1258                 p = per_cpu_ptr(team->pcpu_stats, i);
1259                 do {
1260                         start = u64_stats_fetch_begin_bh(&p->syncp);
1261                         rx_packets      = p->rx_packets;
1262                         rx_bytes        = p->rx_bytes;
1263                         rx_multicast    = p->rx_multicast;
1264                         tx_packets      = p->tx_packets;
1265                         tx_bytes        = p->tx_bytes;
1266                 } while (u64_stats_fetch_retry_bh(&p->syncp, start));
1267
1268                 stats->rx_packets       += rx_packets;
1269                 stats->rx_bytes         += rx_bytes;
1270                 stats->multicast        += rx_multicast;
1271                 stats->tx_packets       += tx_packets;
1272                 stats->tx_bytes         += tx_bytes;
1273                 /*
1274                  * rx_dropped & tx_dropped are u32, updated
1275                  * without syncp protection.
1276                  */
1277                 rx_dropped      += p->rx_dropped;
1278                 tx_dropped      += p->tx_dropped;
1279         }
1280         stats->rx_dropped       = rx_dropped;
1281         stats->tx_dropped       = tx_dropped;
1282         return stats;
1283 }
1284
1285 static int team_vlan_rx_add_vid(struct net_device *dev, uint16_t vid)
1286 {
1287         struct team *team = netdev_priv(dev);
1288         struct team_port *port;
1289         int err;
1290
1291         /*
1292          * Alhough this is reader, it's guarded by team lock. It's not possible
1293          * to traverse list in reverse under rcu_read_lock
1294          */
1295         mutex_lock(&team->lock);
1296         list_for_each_entry(port, &team->port_list, list) {
1297                 err = vlan_vid_add(port->dev, vid);
1298                 if (err)
1299                         goto unwind;
1300         }
1301         mutex_unlock(&team->lock);
1302
1303         return 0;
1304
1305 unwind:
1306         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1307                 vlan_vid_del(port->dev, vid);
1308         mutex_unlock(&team->lock);
1309
1310         return err;
1311 }
1312
1313 static int team_vlan_rx_kill_vid(struct net_device *dev, uint16_t vid)
1314 {
1315         struct team *team = netdev_priv(dev);
1316         struct team_port *port;
1317
1318         rcu_read_lock();
1319         list_for_each_entry_rcu(port, &team->port_list, list)
1320                 vlan_vid_del(port->dev, vid);
1321         rcu_read_unlock();
1322
1323         return 0;
1324 }
1325
1326 static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
1327 {
1328         struct team *team = netdev_priv(dev);
1329         int err;
1330
1331         mutex_lock(&team->lock);
1332         err = team_port_add(team, port_dev);
1333         mutex_unlock(&team->lock);
1334         return err;
1335 }
1336
1337 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1338 {
1339         struct team *team = netdev_priv(dev);
1340         int err;
1341
1342         mutex_lock(&team->lock);
1343         err = team_port_del(team, port_dev);
1344         mutex_unlock(&team->lock);
1345         return err;
1346 }
1347
1348 static netdev_features_t team_fix_features(struct net_device *dev,
1349                                            netdev_features_t features)
1350 {
1351         struct team_port *port;
1352         struct team *team = netdev_priv(dev);
1353         netdev_features_t mask;
1354
1355         mask = features;
1356         features &= ~NETIF_F_ONE_FOR_ALL;
1357         features |= NETIF_F_ALL_FOR_ALL;
1358
1359         rcu_read_lock();
1360         list_for_each_entry_rcu(port, &team->port_list, list) {
1361                 features = netdev_increment_features(features,
1362                                                      port->dev->features,
1363                                                      mask);
1364         }
1365         rcu_read_unlock();
1366         return features;
1367 }
1368
1369 static const struct net_device_ops team_netdev_ops = {
1370         .ndo_init               = team_init,
1371         .ndo_uninit             = team_uninit,
1372         .ndo_open               = team_open,
1373         .ndo_stop               = team_close,
1374         .ndo_start_xmit         = team_xmit,
1375         .ndo_change_rx_flags    = team_change_rx_flags,
1376         .ndo_set_rx_mode        = team_set_rx_mode,
1377         .ndo_set_mac_address    = team_set_mac_address,
1378         .ndo_change_mtu         = team_change_mtu,
1379         .ndo_get_stats64        = team_get_stats64,
1380         .ndo_vlan_rx_add_vid    = team_vlan_rx_add_vid,
1381         .ndo_vlan_rx_kill_vid   = team_vlan_rx_kill_vid,
1382         .ndo_add_slave          = team_add_slave,
1383         .ndo_del_slave          = team_del_slave,
1384         .ndo_fix_features       = team_fix_features,
1385 };
1386
1387
1388 /***********************
1389  * rt netlink interface
1390  ***********************/
1391
1392 static void team_setup(struct net_device *dev)
1393 {
1394         ether_setup(dev);
1395
1396         dev->netdev_ops = &team_netdev_ops;
1397         dev->destructor = team_destructor;
1398         dev->tx_queue_len = 0;
1399         dev->flags |= IFF_MULTICAST;
1400         dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
1401
1402         /*
1403          * Indicate we support unicast address filtering. That way core won't
1404          * bring us to promisc mode in case a unicast addr is added.
1405          * Let this up to underlay drivers.
1406          */
1407         dev->priv_flags |= IFF_UNICAST_FLT;
1408
1409         dev->features |= NETIF_F_LLTX;
1410         dev->features |= NETIF_F_GRO;
1411         dev->hw_features = NETIF_F_HW_VLAN_TX |
1412                            NETIF_F_HW_VLAN_RX |
1413                            NETIF_F_HW_VLAN_FILTER;
1414
1415         dev->features |= dev->hw_features;
1416 }
1417
1418 static int team_newlink(struct net *src_net, struct net_device *dev,
1419                         struct nlattr *tb[], struct nlattr *data[])
1420 {
1421         int err;
1422
1423         if (tb[IFLA_ADDRESS] == NULL)
1424                 eth_hw_addr_random(dev);
1425
1426         err = register_netdevice(dev);
1427         if (err)
1428                 return err;
1429
1430         return 0;
1431 }
1432
1433 static int team_validate(struct nlattr *tb[], struct nlattr *data[])
1434 {
1435         if (tb[IFLA_ADDRESS]) {
1436                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
1437                         return -EINVAL;
1438                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
1439                         return -EADDRNOTAVAIL;
1440         }
1441         return 0;
1442 }
1443
1444 static struct rtnl_link_ops team_link_ops __read_mostly = {
1445         .kind           = DRV_NAME,
1446         .priv_size      = sizeof(struct team),
1447         .setup          = team_setup,
1448         .newlink        = team_newlink,
1449         .validate       = team_validate,
1450 };
1451
1452
1453 /***********************************
1454  * Generic netlink custom interface
1455  ***********************************/
1456
1457 static struct genl_family team_nl_family = {
1458         .id             = GENL_ID_GENERATE,
1459         .name           = TEAM_GENL_NAME,
1460         .version        = TEAM_GENL_VERSION,
1461         .maxattr        = TEAM_ATTR_MAX,
1462         .netnsok        = true,
1463 };
1464
1465 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
1466         [TEAM_ATTR_UNSPEC]                      = { .type = NLA_UNSPEC, },
1467         [TEAM_ATTR_TEAM_IFINDEX]                = { .type = NLA_U32 },
1468         [TEAM_ATTR_LIST_OPTION]                 = { .type = NLA_NESTED },
1469         [TEAM_ATTR_LIST_PORT]                   = { .type = NLA_NESTED },
1470 };
1471
1472 static const struct nla_policy
1473 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
1474         [TEAM_ATTR_OPTION_UNSPEC]               = { .type = NLA_UNSPEC, },
1475         [TEAM_ATTR_OPTION_NAME] = {
1476                 .type = NLA_STRING,
1477                 .len = TEAM_STRING_MAX_LEN,
1478         },
1479         [TEAM_ATTR_OPTION_CHANGED]              = { .type = NLA_FLAG },
1480         [TEAM_ATTR_OPTION_TYPE]                 = { .type = NLA_U8 },
1481         [TEAM_ATTR_OPTION_DATA]                 = { .type = NLA_BINARY },
1482 };
1483
1484 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
1485 {
1486         struct sk_buff *msg;
1487         void *hdr;
1488         int err;
1489
1490         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1491         if (!msg)
1492                 return -ENOMEM;
1493
1494         hdr = genlmsg_put(msg, info->snd_pid, info->snd_seq,
1495                           &team_nl_family, 0, TEAM_CMD_NOOP);
1496         if (IS_ERR(hdr)) {
1497                 err = PTR_ERR(hdr);
1498                 goto err_msg_put;
1499         }
1500
1501         genlmsg_end(msg, hdr);
1502
1503         return genlmsg_unicast(genl_info_net(info), msg, info->snd_pid);
1504
1505 err_msg_put:
1506         nlmsg_free(msg);
1507
1508         return err;
1509 }
1510
1511 /*
1512  * Netlink cmd functions should be locked by following two functions.
1513  * Since dev gets held here, that ensures dev won't disappear in between.
1514  */
1515 static struct team *team_nl_team_get(struct genl_info *info)
1516 {
1517         struct net *net = genl_info_net(info);
1518         int ifindex;
1519         struct net_device *dev;
1520         struct team *team;
1521
1522         if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
1523                 return NULL;
1524
1525         ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
1526         dev = dev_get_by_index(net, ifindex);
1527         if (!dev || dev->netdev_ops != &team_netdev_ops) {
1528                 if (dev)
1529                         dev_put(dev);
1530                 return NULL;
1531         }
1532
1533         team = netdev_priv(dev);
1534         mutex_lock(&team->lock);
1535         return team;
1536 }
1537
1538 static void team_nl_team_put(struct team *team)
1539 {
1540         mutex_unlock(&team->lock);
1541         dev_put(team->dev);
1542 }
1543
1544 static int team_nl_send_generic(struct genl_info *info, struct team *team,
1545                                 int (*fill_func)(struct sk_buff *skb,
1546                                                  struct genl_info *info,
1547                                                  int flags, struct team *team))
1548 {
1549         struct sk_buff *skb;
1550         int err;
1551
1552         skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1553         if (!skb)
1554                 return -ENOMEM;
1555
1556         err = fill_func(skb, info, NLM_F_ACK, team);
1557         if (err < 0)
1558                 goto err_fill;
1559
1560         err = genlmsg_unicast(genl_info_net(info), skb, info->snd_pid);
1561         return err;
1562
1563 err_fill:
1564         nlmsg_free(skb);
1565         return err;
1566 }
1567
1568 static int team_nl_fill_options_get(struct sk_buff *skb,
1569                                     u32 pid, u32 seq, int flags,
1570                                     struct team *team, bool fillall)
1571 {
1572         struct nlattr *option_list;
1573         void *hdr;
1574         struct team_option_inst *opt_inst;
1575         int err;
1576
1577         hdr = genlmsg_put(skb, pid, seq, &team_nl_family, flags,
1578                           TEAM_CMD_OPTIONS_GET);
1579         if (IS_ERR(hdr))
1580                 return PTR_ERR(hdr);
1581
1582         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
1583                 goto nla_put_failure;
1584         option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
1585         if (!option_list)
1586                 return -EMSGSIZE;
1587
1588         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
1589                 struct nlattr *option_item;
1590                 struct team_option *option = opt_inst->option;
1591                 struct team_option_inst_info *opt_inst_info;
1592                 struct team_gsetter_ctx ctx;
1593
1594                 /* Include only changed options if fill all mode is not on */
1595                 if (!fillall && !opt_inst->changed)
1596                         continue;
1597                 option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
1598                 if (!option_item)
1599                         goto nla_put_failure;
1600                 if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
1601                         goto nla_put_failure;
1602                 if (opt_inst->changed) {
1603                         if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
1604                                 goto nla_put_failure;
1605                         opt_inst->changed = false;
1606                 }
1607                 if (opt_inst->removed &&
1608                     nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
1609                         goto nla_put_failure;
1610
1611                 opt_inst_info = &opt_inst->info;
1612                 if (opt_inst_info->port &&
1613                     nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
1614                                 opt_inst_info->port->dev->ifindex))
1615                         goto nla_put_failure;
1616                 if (opt_inst->option->array_size &&
1617                     nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
1618                                 opt_inst_info->array_index))
1619                         goto nla_put_failure;
1620                 ctx.info = opt_inst_info;
1621
1622                 switch (option->type) {
1623                 case TEAM_OPTION_TYPE_U32:
1624                         if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
1625                                 goto nla_put_failure;
1626                         err = team_option_get(team, opt_inst, &ctx);
1627                         if (err)
1628                                 goto errout;
1629                         if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA,
1630                                         ctx.data.u32_val))
1631                                 goto nla_put_failure;
1632                         break;
1633                 case TEAM_OPTION_TYPE_STRING:
1634                         if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
1635                                 goto nla_put_failure;
1636                         err = team_option_get(team, opt_inst, &ctx);
1637                         if (err)
1638                                 goto errout;
1639                         if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
1640                                            ctx.data.str_val))
1641                                 goto nla_put_failure;
1642                         break;
1643                 case TEAM_OPTION_TYPE_BINARY:
1644                         if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
1645                                 goto nla_put_failure;
1646                         err = team_option_get(team, opt_inst, &ctx);
1647                         if (err)
1648                                 goto errout;
1649                         if (nla_put(skb, TEAM_ATTR_OPTION_DATA,
1650                                     ctx.data.bin_val.len, ctx.data.bin_val.ptr))
1651                                 goto nla_put_failure;
1652                         break;
1653                 case TEAM_OPTION_TYPE_BOOL:
1654                         if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
1655                                 goto nla_put_failure;
1656                         err = team_option_get(team, opt_inst, &ctx);
1657                         if (err)
1658                                 goto errout;
1659                         if (ctx.data.bool_val &&
1660                             nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
1661                                 goto nla_put_failure;
1662                         break;
1663                 default:
1664                         BUG();
1665                 }
1666                 nla_nest_end(skb, option_item);
1667         }
1668
1669         nla_nest_end(skb, option_list);
1670         return genlmsg_end(skb, hdr);
1671
1672 nla_put_failure:
1673         err = -EMSGSIZE;
1674 errout:
1675         genlmsg_cancel(skb, hdr);
1676         return err;
1677 }
1678
1679 static int team_nl_fill_options_get_all(struct sk_buff *skb,
1680                                         struct genl_info *info, int flags,
1681                                         struct team *team)
1682 {
1683         return team_nl_fill_options_get(skb, info->snd_pid,
1684                                         info->snd_seq, NLM_F_ACK,
1685                                         team, true);
1686 }
1687
1688 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
1689 {
1690         struct team *team;
1691         int err;
1692
1693         team = team_nl_team_get(info);
1694         if (!team)
1695                 return -EINVAL;
1696
1697         err = team_nl_send_generic(info, team, team_nl_fill_options_get_all);
1698
1699         team_nl_team_put(team);
1700
1701         return err;
1702 }
1703
1704 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
1705 {
1706         struct team *team;
1707         int err = 0;
1708         int i;
1709         struct nlattr *nl_option;
1710
1711         team = team_nl_team_get(info);
1712         if (!team)
1713                 return -EINVAL;
1714
1715         err = -EINVAL;
1716         if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
1717                 err = -EINVAL;
1718                 goto team_put;
1719         }
1720
1721         nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
1722                 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
1723                 struct nlattr *attr;
1724                 struct nlattr *attr_data;
1725                 enum team_option_type opt_type;
1726                 int opt_port_ifindex = 0; /* != 0 for per-port options */
1727                 u32 opt_array_index = 0;
1728                 bool opt_is_array = false;
1729                 struct team_option_inst *opt_inst;
1730                 char *opt_name;
1731                 bool opt_found = false;
1732
1733                 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
1734                         err = -EINVAL;
1735                         goto team_put;
1736                 }
1737                 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
1738                                        nl_option, team_nl_option_policy);
1739                 if (err)
1740                         goto team_put;
1741                 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
1742                     !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
1743                         err = -EINVAL;
1744                         goto team_put;
1745                 }
1746                 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
1747                 case NLA_U32:
1748                         opt_type = TEAM_OPTION_TYPE_U32;
1749                         break;
1750                 case NLA_STRING:
1751                         opt_type = TEAM_OPTION_TYPE_STRING;
1752                         break;
1753                 case NLA_BINARY:
1754                         opt_type = TEAM_OPTION_TYPE_BINARY;
1755                         break;
1756                 case NLA_FLAG:
1757                         opt_type = TEAM_OPTION_TYPE_BOOL;
1758                         break;
1759                 default:
1760                         goto team_put;
1761                 }
1762
1763                 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
1764                 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
1765                         err = -EINVAL;
1766                         goto team_put;
1767                 }
1768
1769                 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
1770                 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
1771                 if (attr)
1772                         opt_port_ifindex = nla_get_u32(attr);
1773
1774                 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
1775                 if (attr) {
1776                         opt_is_array = true;
1777                         opt_array_index = nla_get_u32(attr);
1778                 }
1779
1780                 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
1781                         struct team_option *option = opt_inst->option;
1782                         struct team_gsetter_ctx ctx;
1783                         struct team_option_inst_info *opt_inst_info;
1784                         int tmp_ifindex;
1785
1786                         opt_inst_info = &opt_inst->info;
1787                         tmp_ifindex = opt_inst_info->port ?
1788                                       opt_inst_info->port->dev->ifindex : 0;
1789                         if (option->type != opt_type ||
1790                             strcmp(option->name, opt_name) ||
1791                             tmp_ifindex != opt_port_ifindex ||
1792                             (option->array_size && !opt_is_array) ||
1793                             opt_inst_info->array_index != opt_array_index)
1794                                 continue;
1795                         opt_found = true;
1796                         ctx.info = opt_inst_info;
1797                         switch (opt_type) {
1798                         case TEAM_OPTION_TYPE_U32:
1799                                 ctx.data.u32_val = nla_get_u32(attr_data);
1800                                 break;
1801                         case TEAM_OPTION_TYPE_STRING:
1802                                 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
1803                                         err = -EINVAL;
1804                                         goto team_put;
1805                                 }
1806                                 ctx.data.str_val = nla_data(attr_data);
1807                                 break;
1808                         case TEAM_OPTION_TYPE_BINARY:
1809                                 ctx.data.bin_val.len = nla_len(attr_data);
1810                                 ctx.data.bin_val.ptr = nla_data(attr_data);
1811                                 break;
1812                         case TEAM_OPTION_TYPE_BOOL:
1813                                 ctx.data.bool_val = attr_data ? true : false;
1814                                 break;
1815                         default:
1816                                 BUG();
1817                         }
1818                         err = team_option_set(team, opt_inst, &ctx);
1819                         if (err)
1820                                 goto team_put;
1821                 }
1822                 if (!opt_found) {
1823                         err = -ENOENT;
1824                         goto team_put;
1825                 }
1826         }
1827
1828 team_put:
1829         team_nl_team_put(team);
1830
1831         return err;
1832 }
1833
1834 static int team_nl_fill_port_list_get(struct sk_buff *skb,
1835                                       u32 pid, u32 seq, int flags,
1836                                       struct team *team,
1837                                       bool fillall)
1838 {
1839         struct nlattr *port_list;
1840         void *hdr;
1841         struct team_port *port;
1842
1843         hdr = genlmsg_put(skb, pid, seq, &team_nl_family, flags,
1844                           TEAM_CMD_PORT_LIST_GET);
1845         if (IS_ERR(hdr))
1846                 return PTR_ERR(hdr);
1847
1848         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
1849                 goto nla_put_failure;
1850         port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
1851         if (!port_list)
1852                 return -EMSGSIZE;
1853
1854         list_for_each_entry(port, &team->port_list, list) {
1855                 struct nlattr *port_item;
1856
1857                 /* Include only changed ports if fill all mode is not on */
1858                 if (!fillall && !port->changed)
1859                         continue;
1860                 port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
1861                 if (!port_item)
1862                         goto nla_put_failure;
1863                 if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
1864                         goto nla_put_failure;
1865                 if (port->changed) {
1866                         if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
1867                                 goto nla_put_failure;
1868                         port->changed = false;
1869                 }
1870                 if ((port->removed &&
1871                      nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
1872                     (port->state.linkup &&
1873                      nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
1874                     nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
1875                     nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
1876                         goto nla_put_failure;
1877                 nla_nest_end(skb, port_item);
1878         }
1879
1880         nla_nest_end(skb, port_list);
1881         return genlmsg_end(skb, hdr);
1882
1883 nla_put_failure:
1884         genlmsg_cancel(skb, hdr);
1885         return -EMSGSIZE;
1886 }
1887
1888 static int team_nl_fill_port_list_get_all(struct sk_buff *skb,
1889                                           struct genl_info *info, int flags,
1890                                           struct team *team)
1891 {
1892         return team_nl_fill_port_list_get(skb, info->snd_pid,
1893                                           info->snd_seq, NLM_F_ACK,
1894                                           team, true);
1895 }
1896
1897 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
1898                                      struct genl_info *info)
1899 {
1900         struct team *team;
1901         int err;
1902
1903         team = team_nl_team_get(info);
1904         if (!team)
1905                 return -EINVAL;
1906
1907         err = team_nl_send_generic(info, team, team_nl_fill_port_list_get_all);
1908
1909         team_nl_team_put(team);
1910
1911         return err;
1912 }
1913
1914 static struct genl_ops team_nl_ops[] = {
1915         {
1916                 .cmd = TEAM_CMD_NOOP,
1917                 .doit = team_nl_cmd_noop,
1918                 .policy = team_nl_policy,
1919         },
1920         {
1921                 .cmd = TEAM_CMD_OPTIONS_SET,
1922                 .doit = team_nl_cmd_options_set,
1923                 .policy = team_nl_policy,
1924                 .flags = GENL_ADMIN_PERM,
1925         },
1926         {
1927                 .cmd = TEAM_CMD_OPTIONS_GET,
1928                 .doit = team_nl_cmd_options_get,
1929                 .policy = team_nl_policy,
1930                 .flags = GENL_ADMIN_PERM,
1931         },
1932         {
1933                 .cmd = TEAM_CMD_PORT_LIST_GET,
1934                 .doit = team_nl_cmd_port_list_get,
1935                 .policy = team_nl_policy,
1936                 .flags = GENL_ADMIN_PERM,
1937         },
1938 };
1939
1940 static struct genl_multicast_group team_change_event_mcgrp = {
1941         .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME,
1942 };
1943
1944 static int team_nl_send_event_options_get(struct team *team)
1945 {
1946         struct sk_buff *skb;
1947         int err;
1948         struct net *net = dev_net(team->dev);
1949
1950         skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1951         if (!skb)
1952                 return -ENOMEM;
1953
1954         err = team_nl_fill_options_get(skb, 0, 0, 0, team, false);
1955         if (err < 0)
1956                 goto err_fill;
1957
1958         err = genlmsg_multicast_netns(net, skb, 0, team_change_event_mcgrp.id,
1959                                       GFP_KERNEL);
1960         return err;
1961
1962 err_fill:
1963         nlmsg_free(skb);
1964         return err;
1965 }
1966
1967 static int team_nl_send_event_port_list_get(struct team *team)
1968 {
1969         struct sk_buff *skb;
1970         int err;
1971         struct net *net = dev_net(team->dev);
1972
1973         skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1974         if (!skb)
1975                 return -ENOMEM;
1976
1977         err = team_nl_fill_port_list_get(skb, 0, 0, 0, team, false);
1978         if (err < 0)
1979                 goto err_fill;
1980
1981         err = genlmsg_multicast_netns(net, skb, 0, team_change_event_mcgrp.id,
1982                                       GFP_KERNEL);
1983         return err;
1984
1985 err_fill:
1986         nlmsg_free(skb);
1987         return err;
1988 }
1989
1990 static int team_nl_init(void)
1991 {
1992         int err;
1993
1994         err = genl_register_family_with_ops(&team_nl_family, team_nl_ops,
1995                                             ARRAY_SIZE(team_nl_ops));
1996         if (err)
1997                 return err;
1998
1999         err = genl_register_mc_group(&team_nl_family, &team_change_event_mcgrp);
2000         if (err)
2001                 goto err_change_event_grp_reg;
2002
2003         return 0;
2004
2005 err_change_event_grp_reg:
2006         genl_unregister_family(&team_nl_family);
2007
2008         return err;
2009 }
2010
2011 static void team_nl_fini(void)
2012 {
2013         genl_unregister_family(&team_nl_family);
2014 }
2015
2016
2017 /******************
2018  * Change checkers
2019  ******************/
2020
2021 static void __team_options_change_check(struct team *team)
2022 {
2023         int err;
2024
2025         err = team_nl_send_event_options_get(team);
2026         if (err)
2027                 netdev_warn(team->dev, "Failed to send options change via netlink\n");
2028 }
2029
2030 /* rtnl lock is held */
2031 static void __team_port_change_check(struct team_port *port, bool linkup)
2032 {
2033         int err;
2034
2035         if (!port->removed && port->state.linkup == linkup)
2036                 return;
2037
2038         port->changed = true;
2039         port->state.linkup = linkup;
2040         team_refresh_port_linkup(port);
2041         if (linkup) {
2042                 struct ethtool_cmd ecmd;
2043
2044                 err = __ethtool_get_settings(port->dev, &ecmd);
2045                 if (!err) {
2046                         port->state.speed = ethtool_cmd_speed(&ecmd);
2047                         port->state.duplex = ecmd.duplex;
2048                         goto send_event;
2049                 }
2050         }
2051         port->state.speed = 0;
2052         port->state.duplex = 0;
2053
2054 send_event:
2055         err = team_nl_send_event_port_list_get(port->team);
2056         if (err)
2057                 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink\n",
2058                             port->dev->name);
2059
2060 }
2061
2062 static void team_port_change_check(struct team_port *port, bool linkup)
2063 {
2064         struct team *team = port->team;
2065
2066         mutex_lock(&team->lock);
2067         __team_port_change_check(port, linkup);
2068         mutex_unlock(&team->lock);
2069 }
2070
2071
2072 /************************************
2073  * Net device notifier event handler
2074  ************************************/
2075
2076 static int team_device_event(struct notifier_block *unused,
2077                              unsigned long event, void *ptr)
2078 {
2079         struct net_device *dev = (struct net_device *) ptr;
2080         struct team_port *port;
2081
2082         port = team_port_get_rtnl(dev);
2083         if (!port)
2084                 return NOTIFY_DONE;
2085
2086         switch (event) {
2087         case NETDEV_UP:
2088                 if (netif_carrier_ok(dev))
2089                         team_port_change_check(port, true);
2090         case NETDEV_DOWN:
2091                 team_port_change_check(port, false);
2092         case NETDEV_CHANGE:
2093                 if (netif_running(port->dev))
2094                         team_port_change_check(port,
2095                                                !!netif_carrier_ok(port->dev));
2096                 break;
2097         case NETDEV_UNREGISTER:
2098                 team_del_slave(port->team->dev, dev);
2099                 break;
2100         case NETDEV_FEAT_CHANGE:
2101                 team_compute_features(port->team);
2102                 break;
2103         case NETDEV_CHANGEMTU:
2104                 /* Forbid to change mtu of underlaying device */
2105                 return NOTIFY_BAD;
2106         case NETDEV_PRE_TYPE_CHANGE:
2107                 /* Forbid to change type of underlaying device */
2108                 return NOTIFY_BAD;
2109         }
2110         return NOTIFY_DONE;
2111 }
2112
2113 static struct notifier_block team_notifier_block __read_mostly = {
2114         .notifier_call = team_device_event,
2115 };
2116
2117
2118 /***********************
2119  * Module init and exit
2120  ***********************/
2121
2122 static int __init team_module_init(void)
2123 {
2124         int err;
2125
2126         register_netdevice_notifier(&team_notifier_block);
2127
2128         err = rtnl_link_register(&team_link_ops);
2129         if (err)
2130                 goto err_rtnl_reg;
2131
2132         err = team_nl_init();
2133         if (err)
2134                 goto err_nl_init;
2135
2136         return 0;
2137
2138 err_nl_init:
2139         rtnl_link_unregister(&team_link_ops);
2140
2141 err_rtnl_reg:
2142         unregister_netdevice_notifier(&team_notifier_block);
2143
2144         return err;
2145 }
2146
2147 static void __exit team_module_exit(void)
2148 {
2149         team_nl_fini();
2150         rtnl_link_unregister(&team_link_ops);
2151         unregister_netdevice_notifier(&team_notifier_block);
2152 }
2153
2154 module_init(team_module_init);
2155 module_exit(team_module_exit);
2156
2157 MODULE_LICENSE("GPL v2");
2158 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
2159 MODULE_DESCRIPTION("Ethernet team device driver");
2160 MODULE_ALIAS_RTNL_LINK(DRV_NAME);