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 list_head tmp_list;
  93         struct team_option *option;
  94         struct team_option_inst_info info;
  95         bool changed;
  96         bool removed;
  97 };
  98
  99 static struct team_option *__team_find_option(struct team *team,
 100                                               const char *opt_name)
 101 {
 102         struct team_option *option;
 103
 104         list_for_each_entry(option, &team->option_list, list) {
 105                 if (strcmp(option->name, opt_name) == 0)
 106                         return option;
 107         }
 108         return NULL;
 109 }
 110
 111 static void __team_option_inst_del(struct team_option_inst *opt_inst)
 112 {
 113         list_del(&opt_inst->list);
 114         kfree(opt_inst);
 115 }
 116
 117 static void __team_option_inst_del_option(struct team *team,
 118                                           struct team_option *option)
 119 {
 120         struct team_option_inst *opt_inst, *tmp;
 121
 122         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 123                 if (opt_inst->option == option)
 124                         __team_option_inst_del(opt_inst);
 125         }
 126 }
 127
 128 static int __team_option_inst_add(struct team *team, struct team_option *option,
 129                                   struct team_port *port)
 130 {
 131         struct team_option_inst *opt_inst;
 132         unsigned int array_size;
 133         unsigned int i;
 134         int err;
 135
 136         array_size = option->array_size;
 137         if (!array_size)
 138                 array_size = 1; /* No array but still need one instance */
 139
 140         for (i = 0; i < array_size; i++) {
 141                 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL);
 142                 if (!opt_inst)
 143                         return -ENOMEM;
 144                 opt_inst->option = option;
 145                 opt_inst->info.port = port;
 146                 opt_inst->info.array_index = i;
 147                 opt_inst->changed = true;
 148                 opt_inst->removed = false;
 149                 list_add_tail(&opt_inst->list, &team->option_inst_list);
 150                 if (option->init) {
 151                         err = option->init(team, &opt_inst->info);
 152                         if (err)
 153                                 return err;
 154                 }
 155
 156         }
 157         return 0;
 158 }
 159
 160 static int __team_option_inst_add_option(struct team *team,
 161                                          struct team_option *option)
 162 {
 163         struct team_port *port;
 164         int err;
 165
 166         if (!option->per_port) {
 167                 err = __team_option_inst_add(team, option, NULL);
 168                 if (err)
 169                         goto inst_del_option;
 170         }
 171
 172         list_for_each_entry(port, &team->port_list, list) {
 173                 err = __team_option_inst_add(team, option, port);
 174                 if (err)
 175                         goto inst_del_option;
 176         }
 177         return 0;
 178
 179 inst_del_option:
 180         __team_option_inst_del_option(team, option);
 181         return err;
 182 }
 183
 184 static void __team_option_inst_mark_removed_option(struct team *team,
 185                                                    struct team_option *option)
 186 {
 187         struct team_option_inst *opt_inst;
 188
 189         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 190                 if (opt_inst->option == option) {
 191                         opt_inst->changed = true;
 192                         opt_inst->removed = true;
 193                 }
 194         }
 195 }
 196
 197 static void __team_option_inst_del_port(struct team *team,
 198                                         struct team_port *port)
 199 {
 200         struct team_option_inst *opt_inst, *tmp;
 201
 202         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 203                 if (opt_inst->option->per_port &&
 204                     opt_inst->info.port == port)
 205                         __team_option_inst_del(opt_inst);
 206         }
 207 }
 208
 209 static int __team_option_inst_add_port(struct team *team,
 210                                        struct team_port *port)
 211 {
 212         struct team_option *option;
 213         int err;
 214
 215         list_for_each_entry(option, &team->option_list, list) {
 216                 if (!option->per_port)
 217                         continue;
 218                 err = __team_option_inst_add(team, option, port);
 219                 if (err)
 220                         goto inst_del_port;
 221         }
 222         return 0;
 223
 224 inst_del_port:
 225         __team_option_inst_del_port(team, port);
 226         return err;
 227 }
 228
 229 static void __team_option_inst_mark_removed_port(struct team *team,
 230                                                  struct team_port *port)
 231 {
 232         struct team_option_inst *opt_inst;
 233
 234         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 235                 if (opt_inst->info.port == port) {
 236                         opt_inst->changed = true;
 237                         opt_inst->removed = true;
 238                 }
 239         }
 240 }
 241
 242 static int __team_options_register(struct team *team,
 243                                    const struct team_option *option,
 244                                    size_t option_count)
 245 {
 246         int i;
 247         struct team_option **dst_opts;
 248         int err;
 249
 250         dst_opts = kzalloc(sizeof(struct team_option *) * option_count,
 251                            GFP_KERNEL);
 252         if (!dst_opts)
 253                 return -ENOMEM;
 254         for (i = 0; i < option_count; i++, option++) {
 255                 if (__team_find_option(team, option->name)) {
 256                         err = -EEXIST;
 257                         goto alloc_rollback;
 258                 }
 259                 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
 260                 if (!dst_opts[i]) {
 261                         err = -ENOMEM;
 262                         goto alloc_rollback;
 263                 }
 264         }
 265
 266         for (i = 0; i < option_count; i++) {
 267                 err = __team_option_inst_add_option(team, dst_opts[i]);
 268                 if (err)
 269                         goto inst_rollback;
 270                 list_add_tail(&dst_opts[i]->list, &team->option_list);
 271         }
 272
 273         kfree(dst_opts);
 274         return 0;
 275
 276 inst_rollback:
 277         for (i--; i >= 0; i--)
 278                 __team_option_inst_del_option(team, dst_opts[i]);
 279
 280         i = option_count - 1;
 281 alloc_rollback:
 282         for (i--; i >= 0; i--)
 283                 kfree(dst_opts[i]);
 284
 285         kfree(dst_opts);
 286         return err;
 287 }
 288
 289 static void __team_options_mark_removed(struct team *team,
 290                                         const struct team_option *option,
 291                                         size_t option_count)
 292 {
 293         int i;
 294
 295         for (i = 0; i < option_count; i++, option++) {
 296                 struct team_option *del_opt;
 297
 298                 del_opt = __team_find_option(team, option->name);
 299                 if (del_opt)
 300                         __team_option_inst_mark_removed_option(team, del_opt);
 301         }
 302 }
 303
 304 static void __team_options_unregister(struct team *team,
 305                                       const struct team_option *option,
 306                                       size_t option_count)
 307 {
 308         int i;
 309
 310         for (i = 0; i < option_count; i++, option++) {
 311                 struct team_option *del_opt;
 312
 313                 del_opt = __team_find_option(team, option->name);
 314                 if (del_opt) {
 315                         __team_option_inst_del_option(team, del_opt);
 316                         list_del(&del_opt->list);
 317                         kfree(del_opt);
 318                 }
 319         }
 320 }
 321
 322 static void __team_options_change_check(struct team *team);
 323
 324 int team_options_register(struct team *team,
 325                           const struct team_option *option,
 326                           size_t option_count)
 327 {
 328         int err;
 329
 330         err = __team_options_register(team, option, option_count);
 331         if (err)
 332                 return err;
 333         __team_options_change_check(team);
 334         return 0;
 335 }
 336 EXPORT_SYMBOL(team_options_register);
 337
 338 void team_options_unregister(struct team *team,
 339                              const struct team_option *option,
 340                              size_t option_count)
 341 {
 342         __team_options_mark_removed(team, option, option_count);
 343         __team_options_change_check(team);
 344         __team_options_unregister(team, option, option_count);
 345 }
 346 EXPORT_SYMBOL(team_options_unregister);
 347
 348 static int team_option_get(struct team *team,
 349                            struct team_option_inst *opt_inst,
 350                            struct team_gsetter_ctx *ctx)
 351 {
 352         if (!opt_inst->option->getter)
 353                 return -EOPNOTSUPP;
 354         return opt_inst->option->getter(team, ctx);
 355 }
 356
 357 static int team_option_set(struct team *team,
 358                            struct team_option_inst *opt_inst,
 359                            struct team_gsetter_ctx *ctx)
 360 {
 361         if (!opt_inst->option->setter)
 362                 return -EOPNOTSUPP;
 363         return opt_inst->option->setter(team, ctx);
 364 }
 365
 366 void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info)
 367 {
 368         struct team_option_inst *opt_inst;
 369
 370         opt_inst = container_of(opt_inst_info, struct team_option_inst, info);
 371         opt_inst->changed = true;
 372 }
 373 EXPORT_SYMBOL(team_option_inst_set_change);
 374
 375 void team_options_change_check(struct team *team)
 376 {
 377         __team_options_change_check(team);
 378 }
 379 EXPORT_SYMBOL(team_options_change_check);
 380
 381
 382 /****************
 383  * Mode handling
 384  ****************/
 385
 386 static LIST_HEAD(mode_list);
 387 static DEFINE_SPINLOCK(mode_list_lock);
 388
 389 struct team_mode_item {
 390         struct list_head list;
 391         const struct team_mode *mode;
 392 };
 393
 394 static struct team_mode_item *__find_mode(const char *kind)
 395 {
 396         struct team_mode_item *mitem;
 397
 398         list_for_each_entry(mitem, &mode_list, list) {
 399                 if (strcmp(mitem->mode->kind, kind) == 0)
 400                         return mitem;
 401         }
 402         return NULL;
 403 }
 404
 405 static bool is_good_mode_name(const char *name)
 406 {
 407         while (*name != '\0') {
 408                 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
 409                         return false;
 410                 name++;
 411         }
 412         return true;
 413 }
 414
 415 int team_mode_register(const struct team_mode *mode)
 416 {
 417         int err = 0;
 418         struct team_mode_item *mitem;
 419
 420         if (!is_good_mode_name(mode->kind) ||
 421             mode->priv_size > TEAM_MODE_PRIV_SIZE)
 422                 return -EINVAL;
 423
 424         mitem = kmalloc(sizeof(*mitem), GFP_KERNEL);
 425         if (!mitem)
 426                 return -ENOMEM;
 427
 428         spin_lock(&mode_list_lock);
 429         if (__find_mode(mode->kind)) {
 430                 err = -EEXIST;
 431                 kfree(mitem);
 432                 goto unlock;
 433         }
 434         mitem->mode = mode;
 435         list_add_tail(&mitem->list, &mode_list);
 436 unlock:
 437         spin_unlock(&mode_list_lock);
 438         return err;
 439 }
 440 EXPORT_SYMBOL(team_mode_register);
 441
 442 void team_mode_unregister(const struct team_mode *mode)
 443 {
 444         struct team_mode_item *mitem;
 445
 446         spin_lock(&mode_list_lock);
 447         mitem = __find_mode(mode->kind);
 448         if (mitem) {
 449                 list_del_init(&mitem->list);
 450                 kfree(mitem);
 451         }
 452         spin_unlock(&mode_list_lock);
 453 }
 454 EXPORT_SYMBOL(team_mode_unregister);
 455
 456 static const struct team_mode *team_mode_get(const char *kind)
 457 {
 458         struct team_mode_item *mitem;
 459         const struct team_mode *mode = NULL;
 460
 461         spin_lock(&mode_list_lock);
 462         mitem = __find_mode(kind);
 463         if (!mitem) {
 464                 spin_unlock(&mode_list_lock);
 465                 request_module("team-mode-%s", kind);
 466                 spin_lock(&mode_list_lock);
 467                 mitem = __find_mode(kind);
 468         }
 469         if (mitem) {
 470                 mode = mitem->mode;
 471                 if (!try_module_get(mode->owner))
 472                         mode = NULL;
 473         }
 474
 475         spin_unlock(&mode_list_lock);
 476         return mode;
 477 }
 478
 479 static void team_mode_put(const struct team_mode *mode)
 480 {
 481         module_put(mode->owner);
 482 }
 483
 484 static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
 485 {
 486         dev_kfree_skb_any(skb);
 487         return false;
 488 }
 489
 490 rx_handler_result_t team_dummy_receive(struct team *team,
 491                                        struct team_port *port,
 492                                        struct sk_buff *skb)
 493 {
 494         return RX_HANDLER_ANOTHER;
 495 }
 496
 497 static const struct team_mode __team_no_mode = {
 498         .kind           = "*NOMODE*",
 499 };
 500
 501 static bool team_is_mode_set(struct team *team)
 502 {
 503         return team->mode != &__team_no_mode;
 504 }
 505
 506 static void team_set_no_mode(struct team *team)
 507 {
 508         team->mode = &__team_no_mode;
 509 }
 510
 511 static void __team_adjust_ops(struct team *team, int en_port_count)
 512 {
 513         /*
 514          * To avoid checks in rx/tx skb paths, ensure here that non-null and
 515          * correct ops are always set.
 516          */
 517
 518         if (!en_port_count || !team_is_mode_set(team) ||
 519             !team->mode->ops->transmit)
 520                 team->ops.transmit = team_dummy_transmit;
 521         else
 522                 team->ops.transmit = team->mode->ops->transmit;
 523
 524         if (!en_port_count || !team_is_mode_set(team) ||
 525             !team->mode->ops->receive)
 526                 team->ops.receive = team_dummy_receive;
 527         else
 528                 team->ops.receive = team->mode->ops->receive;
 529 }
 530
 531 static void team_adjust_ops(struct team *team)
 532 {
 533         __team_adjust_ops(team, team->en_port_count);
 534 }
 535
 536 /*
 537  * We can benefit from the fact that it's ensured no port is present
 538  * at the time of mode change. Therefore no packets are in fly so there's no
 539  * need to set mode operations in any special way.
 540  */
 541 static int __team_change_mode(struct team *team,
 542                               const struct team_mode *new_mode)
 543 {
 544         /* Check if mode was previously set and do cleanup if so */
 545         if (team_is_mode_set(team)) {
 546                 void (*exit_op)(struct team *team) = team->ops.exit;
 547
 548                 /* Clear ops area so no callback is called any longer */
 549                 memset(&team->ops, 0, sizeof(struct team_mode_ops));
 550                 team_adjust_ops(team);
 551
 552                 if (exit_op)
 553                         exit_op(team);
 554                 team_mode_put(team->mode);
 555                 team_set_no_mode(team);
 556                 /* zero private data area */
 557                 memset(&team->mode_priv, 0,
 558                        sizeof(struct team) - offsetof(struct team, mode_priv));
 559         }
 560
 561         if (!new_mode)
 562                 return 0;
 563
 564         if (new_mode->ops->init) {
 565                 int err;
 566
 567                 err = new_mode->ops->init(team);
 568                 if (err)
 569                         return err;
 570         }
 571
 572         team->mode = new_mode;
 573         memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
 574         team_adjust_ops(team);
 575
 576         return 0;
 577 }
 578
 579 static int team_change_mode(struct team *team, const char *kind)
 580 {
 581         const struct team_mode *new_mode;
 582         struct net_device *dev = team->dev;
 583         int err;
 584
 585         if (!list_empty(&team->port_list)) {
 586                 netdev_err(dev, "No ports can be present during mode change\n");
 587                 return -EBUSY;
 588         }
 589
 590         if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) {
 591                 netdev_err(dev, "Unable to change to the same mode the team is in\n");
 592                 return -EINVAL;
 593         }
 594
 595         new_mode = team_mode_get(kind);
 596         if (!new_mode) {
 597                 netdev_err(dev, "Mode \"%s\" not found\n", kind);
 598                 return -EINVAL;
 599         }
 600
 601         err = __team_change_mode(team, new_mode);
 602         if (err) {
 603                 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
 604                 team_mode_put(new_mode);
 605                 return err;
 606         }
 607
 608         netdev_info(dev, "Mode changed to \"%s\"\n", kind);
 609         return 0;
 610 }
 611
 612
 613 /************************
 614  * Rx path frame handler
 615  ************************/
 616
 617 /* note: already called with rcu_read_lock */
 618 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
 619 {
 620         struct sk_buff *skb = *pskb;
 621         struct team_port *port;
 622         struct team *team;
 623         rx_handler_result_t res;
 624
 625         skb = skb_share_check(skb, GFP_ATOMIC);
 626         if (!skb)
 627                 return RX_HANDLER_CONSUMED;
 628
 629         *pskb = skb;
 630
 631         port = team_port_get_rcu(skb->dev);
 632         team = port->team;
 633         if (!team_port_enabled(port)) {
 634                 /* allow exact match delivery for disabled ports */
 635                 res = RX_HANDLER_EXACT;
 636         } else {
 637                 res = team->ops.receive(team, port, skb);
 638         }
 639         if (res == RX_HANDLER_ANOTHER) {
 640                 struct team_pcpu_stats *pcpu_stats;
 641
 642                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
 643                 u64_stats_update_begin(&pcpu_stats->syncp);
 644                 pcpu_stats->rx_packets++;
 645                 pcpu_stats->rx_bytes += skb->len;
 646                 if (skb->pkt_type == PACKET_MULTICAST)
 647                         pcpu_stats->rx_multicast++;
 648                 u64_stats_update_end(&pcpu_stats->syncp);
 649
 650                 skb->dev = team->dev;
 651         } else {
 652                 this_cpu_inc(team->pcpu_stats->rx_dropped);
 653         }
 654
 655         return res;
 656 }
 657
 658
 659 /****************
 660  * Port handling
 661  ****************/
 662
 663 static bool team_port_find(const struct team *team,
 664                            const struct team_port *port)
 665 {
 666         struct team_port *cur;
 667
 668         list_for_each_entry(cur, &team->port_list, list)
 669                 if (cur == port)
 670                         return true;
 671         return false;
 672 }
 673
 674 bool team_port_enabled(struct team_port *port)
 675 {
 676         return port->index != -1;
 677 }
 678 EXPORT_SYMBOL(team_port_enabled);
 679
 680 /*
 681  * Enable/disable port by adding to enabled port hashlist and setting
 682  * port->index (Might be racy so reader could see incorrect ifindex when
 683  * processing a flying packet, but that is not a problem). Write guarded
 684  * by team->lock.
 685  */
 686 static void team_port_enable(struct team *team,
 687                              struct team_port *port)
 688 {
 689         if (team_port_enabled(port))
 690                 return;
 691         port->index = team->en_port_count++;
 692         hlist_add_head_rcu(&port->hlist,
 693                            team_port_index_hash(team, port->index));
 694         team_adjust_ops(team);
 695         if (team->ops.port_enabled)
 696                 team->ops.port_enabled(team, port);
 697 }
 698
 699 static void __reconstruct_port_hlist(struct team *team, int rm_index)
 700 {
 701         int i;
 702         struct team_port *port;
 703
 704         for (i = rm_index + 1; i < team->en_port_count; i++) {
 705                 port = team_get_port_by_index(team, i);
 706                 hlist_del_rcu(&port->hlist);
 707                 port->index--;
 708                 hlist_add_head_rcu(&port->hlist,
 709                                    team_port_index_hash(team, port->index));
 710         }
 711 }
 712
 713 static void team_port_disable(struct team *team,
 714                               struct team_port *port)
 715 {
 716         if (!team_port_enabled(port))
 717                 return;
 718         if (team->ops.port_disabled)
 719                 team->ops.port_disabled(team, port);
 720         hlist_del_rcu(&port->hlist);
 721         __reconstruct_port_hlist(team, port->index);
 722         port->index = -1;
 723         __team_adjust_ops(team, team->en_port_count - 1);
 724         /*
 725          * Wait until readers see adjusted ops. This ensures that
 726          * readers never see team->en_port_count == 0
 727          */
 728         synchronize_rcu();
 729         team->en_port_count--;
 730 }
 731
 732 #define TEAM_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \
 733                             NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
 734                             NETIF_F_HIGHDMA | NETIF_F_LRO)
 735
 736 static void __team_compute_features(struct team *team)
 737 {
 738         struct team_port *port;
 739         u32 vlan_features = TEAM_VLAN_FEATURES;
 740         unsigned short max_hard_header_len = ETH_HLEN;
 741
 742         list_for_each_entry(port, &team->port_list, list) {
 743                 vlan_features = netdev_increment_features(vlan_features,
 744                                         port->dev->vlan_features,
 745                                         TEAM_VLAN_FEATURES);
 746
 747                 if (port->dev->hard_header_len > max_hard_header_len)
 748                         max_hard_header_len = port->dev->hard_header_len;
 749         }
 750
 751         team->dev->vlan_features = vlan_features;
 752         team->dev->hard_header_len = max_hard_header_len;
 753
 754         netdev_change_features(team->dev);
 755 }
 756
 757 static void team_compute_features(struct team *team)
 758 {
 759         mutex_lock(&team->lock);
 760         __team_compute_features(team);
 761         mutex_unlock(&team->lock);
 762 }
 763
 764 static int team_port_enter(struct team *team, struct team_port *port)
 765 {
 766         int err = 0;
 767
 768         dev_hold(team->dev);
 769         port->dev->priv_flags |= IFF_TEAM_PORT;
 770         if (team->ops.port_enter) {
 771                 err = team->ops.port_enter(team, port);
 772                 if (err) {
 773                         netdev_err(team->dev, "Device %s failed to enter team mode\n",
 774                                    port->dev->name);
 775                         goto err_port_enter;
 776                 }
 777         }
 778
 779         return 0;
 780
 781 err_port_enter:
 782         port->dev->priv_flags &= ~IFF_TEAM_PORT;
 783         dev_put(team->dev);
 784
 785         return err;
 786 }
 787
 788 static void team_port_leave(struct team *team, struct team_port *port)
 789 {
 790         if (team->ops.port_leave)
 791                 team->ops.port_leave(team, port);
 792         port->dev->priv_flags &= ~IFF_TEAM_PORT;
 793         dev_put(team->dev);
 794 }
 795
 796 static void __team_port_change_check(struct team_port *port, bool linkup);
 797
 798 static int team_port_add(struct team *team, struct net_device *port_dev)
 799 {
 800         struct net_device *dev = team->dev;
 801         struct team_port *port;
 802         char *portname = port_dev->name;
 803         int err;
 804
 805         if (port_dev->flags & IFF_LOOPBACK ||
 806             port_dev->type != ARPHRD_ETHER) {
 807                 netdev_err(dev, "Device %s is of an unsupported type\n",
 808                            portname);
 809                 return -EINVAL;
 810         }
 811
 812         if (team_port_exists(port_dev)) {
 813                 netdev_err(dev, "Device %s is already a port "
 814                                 "of a team device\n", portname);
 815                 return -EBUSY;
 816         }
 817
 818         if (port_dev->flags & IFF_UP) {
 819                 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
 820                            portname);
 821                 return -EBUSY;
 822         }
 823
 824         port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
 825                        GFP_KERNEL);
 826         if (!port)
 827                 return -ENOMEM;
 828
 829         port->dev = port_dev;
 830         port->team = team;
 831
 832         port->orig.mtu = port_dev->mtu;
 833         err = dev_set_mtu(port_dev, dev->mtu);
 834         if (err) {
 835                 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
 836                 goto err_set_mtu;
 837         }
 838
 839         memcpy(port->orig.dev_addr, port_dev->dev_addr, ETH_ALEN);
 840
 841         err = team_port_enter(team, port);
 842         if (err) {
 843                 netdev_err(dev, "Device %s failed to enter team mode\n",
 844                            portname);
 845                 goto err_port_enter;
 846         }
 847
 848         err = dev_open(port_dev);
 849         if (err) {
 850                 netdev_dbg(dev, "Device %s opening failed\n",
 851                            portname);
 852                 goto err_dev_open;
 853         }
 854
 855         err = vlan_vids_add_by_dev(port_dev, dev);
 856         if (err) {
 857                 netdev_err(dev, "Failed to add vlan ids to device %s\n",
 858                                 portname);
 859                 goto err_vids_add;
 860         }
 861
 862         err = netdev_set_master(port_dev, dev);
 863         if (err) {
 864                 netdev_err(dev, "Device %s failed to set master\n", portname);
 865                 goto err_set_master;
 866         }
 867
 868         err = netdev_rx_handler_register(port_dev, team_handle_frame,
 869                                          port);
 870         if (err) {
 871                 netdev_err(dev, "Device %s failed to register rx_handler\n",
 872                            portname);
 873                 goto err_handler_register;
 874         }
 875
 876         err = __team_option_inst_add_port(team, port);
 877         if (err) {
 878                 netdev_err(dev, "Device %s failed to add per-port options\n",
 879                            portname);
 880                 goto err_option_port_add;
 881         }
 882
 883         port->index = -1;
 884         team_port_enable(team, port);
 885         list_add_tail_rcu(&port->list, &team->port_list);
 886         __team_compute_features(team);
 887         __team_port_change_check(port, !!netif_carrier_ok(port_dev));
 888         __team_options_change_check(team);
 889
 890         netdev_info(dev, "Port device %s added\n", portname);
 891
 892         return 0;
 893
 894 err_option_port_add:
 895         netdev_rx_handler_unregister(port_dev);
 896
 897 err_handler_register:
 898         netdev_set_master(port_dev, NULL);
 899
 900 err_set_master:
 901         vlan_vids_del_by_dev(port_dev, dev);
 902
 903 err_vids_add:
 904         dev_close(port_dev);
 905
 906 err_dev_open:
 907         team_port_leave(team, port);
 908         team_port_set_orig_mac(port);
 909
 910 err_port_enter:
 911         dev_set_mtu(port_dev, port->orig.mtu);
 912
 913 err_set_mtu:
 914         kfree(port);
 915
 916         return err;
 917 }
 918
 919 static int team_port_del(struct team *team, struct net_device *port_dev)
 920 {
 921         struct net_device *dev = team->dev;
 922         struct team_port *port;
 923         char *portname = port_dev->name;
 924
 925         port = team_port_get_rtnl(port_dev);
 926         if (!port || !team_port_find(team, port)) {
 927                 netdev_err(dev, "Device %s does not act as a port of this team\n",
 928                            portname);
 929                 return -ENOENT;
 930         }
 931
 932         __team_option_inst_mark_removed_port(team, port);
 933         __team_options_change_check(team);
 934         __team_option_inst_del_port(team, port);
 935         port->removed = true;
 936         __team_port_change_check(port, false);
 937         team_port_disable(team, port);
 938         list_del_rcu(&port->list);
 939         netdev_rx_handler_unregister(port_dev);
 940         netdev_set_master(port_dev, NULL);
 941         vlan_vids_del_by_dev(port_dev, dev);
 942         dev_close(port_dev);
 943         team_port_leave(team, port);
 944         team_port_set_orig_mac(port);
 945         dev_set_mtu(port_dev, port->orig.mtu);
 946         synchronize_rcu();
 947         kfree(port);
 948         netdev_info(dev, "Port device %s removed\n", portname);
 949         __team_compute_features(team);
 950
 951         return 0;
 952 }
 953
 954
 955 /*****************
 956  * Net device ops
 957  *****************/
 958
 959 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
 960 {
 961         ctx->data.str_val = team->mode->kind;
 962         return 0;
 963 }
 964
 965 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
 966 {
 967         return team_change_mode(team, ctx->data.str_val);
 968 }
 969
 970 static int team_port_en_option_get(struct team *team,
 971                                    struct team_gsetter_ctx *ctx)
 972 {
 973         struct team_port *port = ctx->info->port;
 974
 975         ctx->data.bool_val = team_port_enabled(port);
 976         return 0;
 977 }
 978
 979 static int team_port_en_option_set(struct team *team,
 980                                    struct team_gsetter_ctx *ctx)
 981 {
 982         struct team_port *port = ctx->info->port;
 983
 984         if (ctx->data.bool_val)
 985                 team_port_enable(team, port);
 986         else
 987                 team_port_disable(team, port);
 988         return 0;
 989 }
 990
 991 static int team_user_linkup_option_get(struct team *team,
 992                                        struct team_gsetter_ctx *ctx)
 993 {
 994         struct team_port *port = ctx->info->port;
 995
 996         ctx->data.bool_val = port->user.linkup;
 997         return 0;
 998 }
 999
1000 static int team_user_linkup_option_set(struct team *team,
1001                                        struct team_gsetter_ctx *ctx)
1002 {
1003         struct team_port *port = ctx->info->port;
1004
1005         port->user.linkup = ctx->data.bool_val;
1006         team_refresh_port_linkup(port);
1007         return 0;
1008 }
1009
1010 static int team_user_linkup_en_option_get(struct team *team,
1011                                           struct team_gsetter_ctx *ctx)
1012 {
1013         struct team_port *port = ctx->info->port;
1014
1015         ctx->data.bool_val = port->user.linkup_enabled;
1016         return 0;
1017 }
1018
1019 static int team_user_linkup_en_option_set(struct team *team,
1020                                           struct team_gsetter_ctx *ctx)
1021 {
1022         struct team_port *port = ctx->info->port;
1023
1024         port->user.linkup_enabled = ctx->data.bool_val;
1025         team_refresh_port_linkup(port);
1026         return 0;
1027 }
1028
1029 static const struct team_option team_options[] = {
1030         {
1031                 .name = "mode",
1032                 .type = TEAM_OPTION_TYPE_STRING,
1033                 .getter = team_mode_option_get,
1034                 .setter = team_mode_option_set,
1035         },
1036         {
1037                 .name = "enabled",
1038                 .type = TEAM_OPTION_TYPE_BOOL,
1039                 .per_port = true,
1040                 .getter = team_port_en_option_get,
1041                 .setter = team_port_en_option_set,
1042         },
1043         {
1044                 .name = "user_linkup",
1045                 .type = TEAM_OPTION_TYPE_BOOL,
1046                 .per_port = true,
1047                 .getter = team_user_linkup_option_get,
1048                 .setter = team_user_linkup_option_set,
1049         },
1050         {
1051                 .name = "user_linkup_enabled",
1052                 .type = TEAM_OPTION_TYPE_BOOL,
1053                 .per_port = true,
1054                 .getter = team_user_linkup_en_option_get,
1055                 .setter = team_user_linkup_en_option_set,
1056         },
1057 };
1058
1059 static int team_init(struct net_device *dev)
1060 {
1061         struct team *team = netdev_priv(dev);
1062         int i;
1063         int err;
1064
1065         team->dev = dev;
1066         mutex_init(&team->lock);
1067         team_set_no_mode(team);
1068
1069         team->pcpu_stats = alloc_percpu(struct team_pcpu_stats);
1070         if (!team->pcpu_stats)
1071                 return -ENOMEM;
1072
1073         for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1074                 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1075         INIT_LIST_HEAD(&team->port_list);
1076
1077         team_adjust_ops(team);
1078
1079         INIT_LIST_HEAD(&team->option_list);
1080         INIT_LIST_HEAD(&team->option_inst_list);
1081         err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1082         if (err)
1083                 goto err_options_register;
1084         netif_carrier_off(dev);
1085
1086         return 0;
1087
1088 err_options_register:
1089         free_percpu(team->pcpu_stats);
1090
1091         return err;
1092 }
1093
1094 static void team_uninit(struct net_device *dev)
1095 {
1096         struct team *team = netdev_priv(dev);
1097         struct team_port *port;
1098         struct team_port *tmp;
1099
1100         mutex_lock(&team->lock);
1101         list_for_each_entry_safe(port, tmp, &team->port_list, list)
1102                 team_port_del(team, port->dev);
1103
1104         __team_change_mode(team, NULL); /* cleanup */
1105         __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1106         mutex_unlock(&team->lock);
1107 }
1108
1109 static void team_destructor(struct net_device *dev)
1110 {
1111         struct team *team = netdev_priv(dev);
1112
1113         free_percpu(team->pcpu_stats);
1114         free_netdev(dev);
1115 }
1116
1117 static int team_open(struct net_device *dev)
1118 {
1119         netif_carrier_on(dev);
1120         return 0;
1121 }
1122
1123 static int team_close(struct net_device *dev)
1124 {
1125         netif_carrier_off(dev);
1126         return 0;
1127 }
1128
1129 /*
1130  * note: already called with rcu_read_lock
1131  */
1132 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1133 {
1134         struct team *team = netdev_priv(dev);
1135         bool tx_success = false;
1136         unsigned int len = skb->len;
1137
1138         tx_success = team->ops.transmit(team, skb);
1139         if (tx_success) {
1140                 struct team_pcpu_stats *pcpu_stats;
1141
1142                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1143                 u64_stats_update_begin(&pcpu_stats->syncp);
1144                 pcpu_stats->tx_packets++;
1145                 pcpu_stats->tx_bytes += len;
1146                 u64_stats_update_end(&pcpu_stats->syncp);
1147         } else {
1148                 this_cpu_inc(team->pcpu_stats->tx_dropped);
1149         }
1150
1151         return NETDEV_TX_OK;
1152 }
1153
1154 static void team_change_rx_flags(struct net_device *dev, int change)
1155 {
1156         struct team *team = netdev_priv(dev);
1157         struct team_port *port;
1158         int inc;
1159
1160         rcu_read_lock();
1161         list_for_each_entry_rcu(port, &team->port_list, list) {
1162                 if (change & IFF_PROMISC) {
1163                         inc = dev->flags & IFF_PROMISC ? 1 : -1;
1164                         dev_set_promiscuity(port->dev, inc);
1165                 }
1166                 if (change & IFF_ALLMULTI) {
1167                         inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1168                         dev_set_allmulti(port->dev, inc);
1169                 }
1170         }
1171         rcu_read_unlock();
1172 }
1173
1174 static void team_set_rx_mode(struct net_device *dev)
1175 {
1176         struct team *team = netdev_priv(dev);
1177         struct team_port *port;
1178
1179         rcu_read_lock();
1180         list_for_each_entry_rcu(port, &team->port_list, list) {
1181                 dev_uc_sync(port->dev, dev);
1182                 dev_mc_sync(port->dev, dev);
1183         }
1184         rcu_read_unlock();
1185 }
1186
1187 static int team_set_mac_address(struct net_device *dev, void *p)
1188 {
1189         struct team *team = netdev_priv(dev);
1190         struct team_port *port;
1191         struct sockaddr *addr = p;
1192
1193         dev->addr_assign_type &= ~NET_ADDR_RANDOM;
1194         memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
1195         rcu_read_lock();
1196         list_for_each_entry_rcu(port, &team->port_list, list)
1197                 if (team->ops.port_change_mac)
1198                         team->ops.port_change_mac(team, port);
1199         rcu_read_unlock();
1200         return 0;
1201 }
1202
1203 static int team_change_mtu(struct net_device *dev, int new_mtu)
1204 {
1205         struct team *team = netdev_priv(dev);
1206         struct team_port *port;
1207         int err;
1208
1209         /*
1210          * Alhough this is reader, it's guarded by team lock. It's not possible
1211          * to traverse list in reverse under rcu_read_lock
1212          */
1213         mutex_lock(&team->lock);
1214         list_for_each_entry(port, &team->port_list, list) {
1215                 err = dev_set_mtu(port->dev, new_mtu);
1216                 if (err) {
1217                         netdev_err(dev, "Device %s failed to change mtu",
1218                                    port->dev->name);
1219                         goto unwind;
1220                 }
1221         }
1222         mutex_unlock(&team->lock);
1223
1224         dev->mtu = new_mtu;
1225
1226         return 0;
1227
1228 unwind:
1229         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1230                 dev_set_mtu(port->dev, dev->mtu);
1231         mutex_unlock(&team->lock);
1232
1233         return err;
1234 }
1235
1236 static struct rtnl_link_stats64 *
1237 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1238 {
1239         struct team *team = netdev_priv(dev);
1240         struct team_pcpu_stats *p;
1241         u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1242         u32 rx_dropped = 0, tx_dropped = 0;
1243         unsigned int start;
1244         int i;
1245
1246         for_each_possible_cpu(i) {
1247                 p = per_cpu_ptr(team->pcpu_stats, i);
1248                 do {
1249                         start = u64_stats_fetch_begin_bh(&p->syncp);
1250                         rx_packets      = p->rx_packets;
1251                         rx_bytes        = p->rx_bytes;
1252                         rx_multicast    = p->rx_multicast;
1253                         tx_packets      = p->tx_packets;
1254                         tx_bytes        = p->tx_bytes;
1255                 } while (u64_stats_fetch_retry_bh(&p->syncp, start));
1256
1257                 stats->rx_packets       += rx_packets;
1258                 stats->rx_bytes         += rx_bytes;
1259                 stats->multicast        += rx_multicast;
1260                 stats->tx_packets       += tx_packets;
1261                 stats->tx_bytes         += tx_bytes;
1262                 /*
1263                  * rx_dropped & tx_dropped are u32, updated
1264                  * without syncp protection.
1265                  */
1266                 rx_dropped      += p->rx_dropped;
1267                 tx_dropped      += p->tx_dropped;
1268         }
1269         stats->rx_dropped       = rx_dropped;
1270         stats->tx_dropped       = tx_dropped;
1271         return stats;
1272 }
1273
1274 static int team_vlan_rx_add_vid(struct net_device *dev, uint16_t vid)
1275 {
1276         struct team *team = netdev_priv(dev);
1277         struct team_port *port;
1278         int err;
1279
1280         /*
1281          * Alhough this is reader, it's guarded by team lock. It's not possible
1282          * to traverse list in reverse under rcu_read_lock
1283          */
1284         mutex_lock(&team->lock);
1285         list_for_each_entry(port, &team->port_list, list) {
1286                 err = vlan_vid_add(port->dev, vid);
1287                 if (err)
1288                         goto unwind;
1289         }
1290         mutex_unlock(&team->lock);
1291
1292         return 0;
1293
1294 unwind:
1295         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1296                 vlan_vid_del(port->dev, vid);
1297         mutex_unlock(&team->lock);
1298
1299         return err;
1300 }
1301
1302 static int team_vlan_rx_kill_vid(struct net_device *dev, uint16_t vid)
1303 {
1304         struct team *team = netdev_priv(dev);
1305         struct team_port *port;
1306
1307         rcu_read_lock();
1308         list_for_each_entry_rcu(port, &team->port_list, list)
1309                 vlan_vid_del(port->dev, vid);
1310         rcu_read_unlock();
1311
1312         return 0;
1313 }
1314
1315 static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
1316 {
1317         struct team *team = netdev_priv(dev);
1318         int err;
1319
1320         mutex_lock(&team->lock);
1321         err = team_port_add(team, port_dev);
1322         mutex_unlock(&team->lock);
1323         return err;
1324 }
1325
1326 static int team_del_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_del(team, port_dev);
1333         mutex_unlock(&team->lock);
1334         return err;
1335 }
1336
1337 static netdev_features_t team_fix_features(struct net_device *dev,
1338                                            netdev_features_t features)
1339 {
1340         struct team_port *port;
1341         struct team *team = netdev_priv(dev);
1342         netdev_features_t mask;
1343
1344         mask = features;
1345         features &= ~NETIF_F_ONE_FOR_ALL;
1346         features |= NETIF_F_ALL_FOR_ALL;
1347
1348         rcu_read_lock();
1349         list_for_each_entry_rcu(port, &team->port_list, list) {
1350                 features = netdev_increment_features(features,
1351                                                      port->dev->features,
1352                                                      mask);
1353         }
1354         rcu_read_unlock();
1355         return features;
1356 }
1357
1358 static const struct net_device_ops team_netdev_ops = {
1359         .ndo_init               = team_init,
1360         .ndo_uninit             = team_uninit,
1361         .ndo_open               = team_open,
1362         .ndo_stop               = team_close,
1363         .ndo_start_xmit         = team_xmit,
1364         .ndo_change_rx_flags    = team_change_rx_flags,
1365         .ndo_set_rx_mode        = team_set_rx_mode,
1366         .ndo_set_mac_address    = team_set_mac_address,
1367         .ndo_change_mtu         = team_change_mtu,
1368         .ndo_get_stats64        = team_get_stats64,
1369         .ndo_vlan_rx_add_vid    = team_vlan_rx_add_vid,
1370         .ndo_vlan_rx_kill_vid   = team_vlan_rx_kill_vid,
1371         .ndo_add_slave          = team_add_slave,
1372         .ndo_del_slave          = team_del_slave,
1373         .ndo_fix_features       = team_fix_features,
1374 };
1375
1376
1377 /***********************
1378  * rt netlink interface
1379  ***********************/
1380
1381 static void team_setup(struct net_device *dev)
1382 {
1383         ether_setup(dev);
1384
1385         dev->netdev_ops = &team_netdev_ops;
1386         dev->destructor = team_destructor;
1387         dev->tx_queue_len = 0;
1388         dev->flags |= IFF_MULTICAST;
1389         dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
1390
1391         /*
1392          * Indicate we support unicast address filtering. That way core won't
1393          * bring us to promisc mode in case a unicast addr is added.
1394          * Let this up to underlay drivers.
1395          */
1396         dev->priv_flags |= IFF_UNICAST_FLT;
1397
1398         dev->features |= NETIF_F_LLTX;
1399         dev->features |= NETIF_F_GRO;
1400         dev->hw_features = NETIF_F_HW_VLAN_TX |
1401                            NETIF_F_HW_VLAN_RX |
1402                            NETIF_F_HW_VLAN_FILTER;
1403
1404         dev->features |= dev->hw_features;
1405 }
1406
1407 static int team_newlink(struct net *src_net, struct net_device *dev,
1408                         struct nlattr *tb[], struct nlattr *data[])
1409 {
1410         int err;
1411
1412         if (tb[IFLA_ADDRESS] == NULL)
1413                 eth_hw_addr_random(dev);
1414
1415         err = register_netdevice(dev);
1416         if (err)
1417                 return err;
1418
1419         return 0;
1420 }
1421
1422 static int team_validate(struct nlattr *tb[], struct nlattr *data[])
1423 {
1424         if (tb[IFLA_ADDRESS]) {
1425                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
1426                         return -EINVAL;
1427                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
1428                         return -EADDRNOTAVAIL;
1429         }
1430         return 0;
1431 }
1432
1433 static struct rtnl_link_ops team_link_ops __read_mostly = {
1434         .kind           = DRV_NAME,
1435         .priv_size      = sizeof(struct team),
1436         .setup          = team_setup,
1437         .newlink        = team_newlink,
1438         .validate       = team_validate,
1439 };
1440
1441
1442 /***********************************
1443  * Generic netlink custom interface
1444  ***********************************/
1445
1446 static struct genl_family team_nl_family = {
1447         .id             = GENL_ID_GENERATE,
1448         .name           = TEAM_GENL_NAME,
1449         .version        = TEAM_GENL_VERSION,
1450         .maxattr        = TEAM_ATTR_MAX,
1451         .netnsok        = true,
1452 };
1453
1454 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
1455         [TEAM_ATTR_UNSPEC]                      = { .type = NLA_UNSPEC, },
1456         [TEAM_ATTR_TEAM_IFINDEX]                = { .type = NLA_U32 },
1457         [TEAM_ATTR_LIST_OPTION]                 = { .type = NLA_NESTED },
1458         [TEAM_ATTR_LIST_PORT]                   = { .type = NLA_NESTED },
1459 };
1460
1461 static const struct nla_policy
1462 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
1463         [TEAM_ATTR_OPTION_UNSPEC]               = { .type = NLA_UNSPEC, },
1464         [TEAM_ATTR_OPTION_NAME] = {
1465                 .type = NLA_STRING,
1466                 .len = TEAM_STRING_MAX_LEN,
1467         },
1468         [TEAM_ATTR_OPTION_CHANGED]              = { .type = NLA_FLAG },
1469         [TEAM_ATTR_OPTION_TYPE]                 = { .type = NLA_U8 },
1470         [TEAM_ATTR_OPTION_DATA]                 = { .type = NLA_BINARY },
1471 };
1472
1473 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
1474 {
1475         struct sk_buff *msg;
1476         void *hdr;
1477         int err;
1478
1479         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1480         if (!msg)
1481                 return -ENOMEM;
1482
1483         hdr = genlmsg_put(msg, info->snd_pid, info->snd_seq,
1484                           &team_nl_family, 0, TEAM_CMD_NOOP);
1485         if (IS_ERR(hdr)) {
1486                 err = PTR_ERR(hdr);
1487                 goto err_msg_put;
1488         }
1489
1490         genlmsg_end(msg, hdr);
1491
1492         return genlmsg_unicast(genl_info_net(info), msg, info->snd_pid);
1493
1494 err_msg_put:
1495         nlmsg_free(msg);
1496
1497         return err;
1498 }
1499
1500 /*
1501  * Netlink cmd functions should be locked by following two functions.
1502  * Since dev gets held here, that ensures dev won't disappear in between.
1503  */
1504 static struct team *team_nl_team_get(struct genl_info *info)
1505 {
1506         struct net *net = genl_info_net(info);
1507         int ifindex;
1508         struct net_device *dev;
1509         struct team *team;
1510
1511         if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
1512                 return NULL;
1513
1514         ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
1515         dev = dev_get_by_index(net, ifindex);
1516         if (!dev || dev->netdev_ops != &team_netdev_ops) {
1517                 if (dev)
1518                         dev_put(dev);
1519                 return NULL;
1520         }
1521
1522         team = netdev_priv(dev);
1523         mutex_lock(&team->lock);
1524         return team;
1525 }
1526
1527 static void team_nl_team_put(struct team *team)
1528 {
1529         mutex_unlock(&team->lock);
1530         dev_put(team->dev);
1531 }
1532
1533 static int team_nl_send_generic(struct genl_info *info, struct team *team,
1534                                 int (*fill_func)(struct sk_buff *skb,
1535                                                  struct genl_info *info,
1536                                                  int flags, struct team *team))
1537 {
1538         struct sk_buff *skb;
1539         int err;
1540
1541         skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1542         if (!skb)
1543                 return -ENOMEM;
1544
1545         err = fill_func(skb, info, NLM_F_ACK, team);
1546         if (err < 0)
1547                 goto err_fill;
1548
1549         err = genlmsg_unicast(genl_info_net(info), skb, info->snd_pid);
1550         return err;
1551
1552 err_fill:
1553         nlmsg_free(skb);
1554         return err;
1555 }
1556
1557 typedef int team_nl_send_func_t(struct sk_buff *skb,
1558                                 struct team *team, u32 pid);
1559
1560 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 pid)
1561 {
1562         return genlmsg_unicast(dev_net(team->dev), skb, pid);
1563 }
1564
1565 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
1566                                        struct team_option_inst *opt_inst)
1567 {
1568         struct nlattr *option_item;
1569         struct team_option *option = opt_inst->option;
1570         struct team_option_inst_info *opt_inst_info = &opt_inst->info;
1571         struct team_gsetter_ctx ctx;
1572         int err;
1573
1574         ctx.info = opt_inst_info;
1575         err = team_option_get(team, opt_inst, &ctx);
1576         if (err)
1577                 return err;
1578
1579         option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
1580         if (!option_item)
1581                 return -EMSGSIZE;
1582
1583         if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
1584                 goto nest_cancel;
1585         if (opt_inst_info->port &&
1586             nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
1587                         opt_inst_info->port->dev->ifindex))
1588                 goto nest_cancel;
1589         if (opt_inst->option->array_size &&
1590             nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
1591                         opt_inst_info->array_index))
1592                 goto nest_cancel;
1593
1594         switch (option->type) {
1595         case TEAM_OPTION_TYPE_U32:
1596                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
1597                         goto nest_cancel;
1598                 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
1599                         goto nest_cancel;
1600                 break;
1601         case TEAM_OPTION_TYPE_STRING:
1602                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
1603                         goto nest_cancel;
1604                 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
1605                                    ctx.data.str_val))
1606                         goto nest_cancel;
1607                 break;
1608         case TEAM_OPTION_TYPE_BINARY:
1609                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
1610                         goto nest_cancel;
1611                 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
1612                             ctx.data.bin_val.ptr))
1613                         goto nest_cancel;
1614                 break;
1615         case TEAM_OPTION_TYPE_BOOL:
1616                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
1617                         goto nest_cancel;
1618                 if (ctx.data.bool_val &&
1619                     nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
1620                         goto nest_cancel;
1621                 break;
1622         default:
1623                 BUG();
1624         }
1625         if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
1626                 goto nest_cancel;
1627         if (opt_inst->changed) {
1628                 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
1629                         goto nest_cancel;
1630                 opt_inst->changed = false;
1631         }
1632         nla_nest_end(skb, option_item);
1633         return 0;
1634
1635 nest_cancel:
1636         nla_nest_cancel(skb, option_item);
1637         return -EMSGSIZE;
1638 }
1639
1640 static int __send_and_alloc_skb(struct sk_buff **pskb,
1641                                 struct team *team, u32 pid,
1642                                 team_nl_send_func_t *send_func)
1643 {
1644         int err;
1645
1646         if (*pskb) {
1647                 err = send_func(*pskb, team, pid);
1648                 if (err)
1649                         return err;
1650         }
1651         *pskb = genlmsg_new(NLMSG_DEFAULT_SIZE - GENL_HDRLEN, GFP_KERNEL);
1652         if (!*pskb)
1653                 return -ENOMEM;
1654         return 0;
1655 }
1656
1657 static int team_nl_send_options_get(struct team *team, u32 pid, u32 seq,
1658                                     int flags, team_nl_send_func_t *send_func,
1659                                     struct list_head *sel_opt_inst_list)
1660 {
1661         struct nlattr *option_list;
1662         struct nlmsghdr *nlh;
1663         void *hdr;
1664         struct team_option_inst *opt_inst;
1665         int err;
1666         struct sk_buff *skb = NULL;
1667         bool incomplete;
1668         int i;
1669
1670         opt_inst = list_first_entry(sel_opt_inst_list,
1671                                     struct team_option_inst, tmp_list);
1672
1673 start_again:
1674         err = __send_and_alloc_skb(&skb, team, pid, send_func);
1675         if (err)
1676                 return err;
1677
1678         hdr = genlmsg_put(skb, pid, seq, &team_nl_family, flags | NLM_F_MULTI,
1679                           TEAM_CMD_OPTIONS_GET);
1680         if (IS_ERR(hdr))
1681                 return PTR_ERR(hdr);
1682
1683         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
1684                 goto nla_put_failure;
1685         option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
1686         if (!option_list)
1687                 goto nla_put_failure;
1688
1689         i = 0;
1690         incomplete = false;
1691         list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
1692                 err = team_nl_fill_one_option_get(skb, team, opt_inst);
1693                 if (err) {
1694                         if (err == -EMSGSIZE) {
1695                                 if (!i)
1696                                         goto errout;
1697                                 incomplete = true;
1698                                 break;
1699                         }
1700                         goto errout;
1701                 }
1702                 i++;
1703         }
1704
1705         nla_nest_end(skb, option_list);
1706         genlmsg_end(skb, hdr);
1707         if (incomplete)
1708                 goto start_again;
1709
1710 send_done:
1711         nlh = nlmsg_put(skb, pid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
1712         if (!nlh) {
1713                 err = __send_and_alloc_skb(&skb, team, pid, send_func);
1714                 if (err)
1715                         goto errout;
1716                 goto send_done;
1717         }
1718
1719         return send_func(skb, team, pid);
1720
1721 nla_put_failure:
1722         err = -EMSGSIZE;
1723 errout:
1724         genlmsg_cancel(skb, hdr);
1725         nlmsg_free(skb);
1726         return err;
1727 }
1728
1729 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
1730 {
1731         struct team *team;
1732         struct team_option_inst *opt_inst;
1733         int err;
1734         LIST_HEAD(sel_opt_inst_list);
1735
1736         team = team_nl_team_get(info);
1737         if (!team)
1738                 return -EINVAL;
1739
1740         list_for_each_entry(opt_inst, &team->option_inst_list, list)
1741                 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
1742         err = team_nl_send_options_get(team, info->snd_pid, info->snd_seq,
1743                                        NLM_F_ACK, team_nl_send_unicast,
1744                                        &sel_opt_inst_list);
1745
1746         team_nl_team_put(team);
1747
1748         return err;
1749 }
1750
1751 static int team_nl_send_event_options_get(struct team *team,
1752                                           struct list_head *sel_opt_inst_list);
1753
1754 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
1755 {
1756         struct team *team;
1757         int err = 0;
1758         int i;
1759         struct nlattr *nl_option;
1760         LIST_HEAD(opt_inst_list);
1761
1762         team = team_nl_team_get(info);
1763         if (!team)
1764                 return -EINVAL;
1765
1766         err = -EINVAL;
1767         if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
1768                 err = -EINVAL;
1769                 goto team_put;
1770         }
1771
1772         nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
1773                 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
1774                 struct nlattr *attr;
1775                 struct nlattr *attr_data;
1776                 enum team_option_type opt_type;
1777                 int opt_port_ifindex = 0; /* != 0 for per-port options */
1778                 u32 opt_array_index = 0;
1779                 bool opt_is_array = false;
1780                 struct team_option_inst *opt_inst;
1781                 char *opt_name;
1782                 bool opt_found = false;
1783
1784                 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
1785                         err = -EINVAL;
1786                         goto team_put;
1787                 }
1788                 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
1789                                        nl_option, team_nl_option_policy);
1790                 if (err)
1791                         goto team_put;
1792                 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
1793                     !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
1794                         err = -EINVAL;
1795                         goto team_put;
1796                 }
1797                 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
1798                 case NLA_U32:
1799                         opt_type = TEAM_OPTION_TYPE_U32;
1800                         break;
1801                 case NLA_STRING:
1802                         opt_type = TEAM_OPTION_TYPE_STRING;
1803                         break;
1804                 case NLA_BINARY:
1805                         opt_type = TEAM_OPTION_TYPE_BINARY;
1806                         break;
1807                 case NLA_FLAG:
1808                         opt_type = TEAM_OPTION_TYPE_BOOL;
1809                         break;
1810                 default:
1811                         goto team_put;
1812                 }
1813
1814                 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
1815                 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
1816                         err = -EINVAL;
1817                         goto team_put;
1818                 }
1819
1820                 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
1821                 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
1822                 if (attr)
1823                         opt_port_ifindex = nla_get_u32(attr);
1824
1825                 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
1826                 if (attr) {
1827                         opt_is_array = true;
1828                         opt_array_index = nla_get_u32(attr);
1829                 }
1830
1831                 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
1832                         struct team_option *option = opt_inst->option;
1833                         struct team_gsetter_ctx ctx;
1834                         struct team_option_inst_info *opt_inst_info;
1835                         int tmp_ifindex;
1836
1837                         opt_inst_info = &opt_inst->info;
1838                         tmp_ifindex = opt_inst_info->port ?
1839                                       opt_inst_info->port->dev->ifindex : 0;
1840                         if (option->type != opt_type ||
1841                             strcmp(option->name, opt_name) ||
1842                             tmp_ifindex != opt_port_ifindex ||
1843                             (option->array_size && !opt_is_array) ||
1844                             opt_inst_info->array_index != opt_array_index)
1845                                 continue;
1846                         opt_found = true;
1847                         ctx.info = opt_inst_info;
1848                         switch (opt_type) {
1849                         case TEAM_OPTION_TYPE_U32:
1850                                 ctx.data.u32_val = nla_get_u32(attr_data);
1851                                 break;
1852                         case TEAM_OPTION_TYPE_STRING:
1853                                 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
1854                                         err = -EINVAL;
1855                                         goto team_put;
1856                                 }
1857                                 ctx.data.str_val = nla_data(attr_data);
1858                                 break;
1859                         case TEAM_OPTION_TYPE_BINARY:
1860                                 ctx.data.bin_val.len = nla_len(attr_data);
1861                                 ctx.data.bin_val.ptr = nla_data(attr_data);
1862                                 break;
1863                         case TEAM_OPTION_TYPE_BOOL:
1864                                 ctx.data.bool_val = attr_data ? true : false;
1865                                 break;
1866                         default:
1867                                 BUG();
1868                         }
1869                         err = team_option_set(team, opt_inst, &ctx);
1870                         if (err)
1871                                 goto team_put;
1872                         opt_inst->changed = true;
1873                         list_add(&opt_inst->tmp_list, &opt_inst_list);
1874                 }
1875                 if (!opt_found) {
1876                         err = -ENOENT;
1877                         goto team_put;
1878                 }
1879         }
1880
1881         err = team_nl_send_event_options_get(team, &opt_inst_list);
1882
1883 team_put:
1884         team_nl_team_put(team);
1885
1886         return err;
1887 }
1888
1889 static int team_nl_fill_port_list_get(struct sk_buff *skb,
1890                                       u32 pid, u32 seq, int flags,
1891                                       struct team *team,
1892                                       bool fillall)
1893 {
1894         struct nlattr *port_list;
1895         void *hdr;
1896         struct team_port *port;
1897
1898         hdr = genlmsg_put(skb, pid, seq, &team_nl_family, flags,
1899                           TEAM_CMD_PORT_LIST_GET);
1900         if (IS_ERR(hdr))
1901                 return PTR_ERR(hdr);
1902
1903         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
1904                 goto nla_put_failure;
1905         port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
1906         if (!port_list)
1907                 goto nla_put_failure;
1908
1909         list_for_each_entry(port, &team->port_list, list) {
1910                 struct nlattr *port_item;
1911
1912                 /* Include only changed ports if fill all mode is not on */
1913                 if (!fillall && !port->changed)
1914                         continue;
1915                 port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
1916                 if (!port_item)
1917                         goto nla_put_failure;
1918                 if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
1919                         goto nla_put_failure;
1920                 if (port->changed) {
1921                         if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
1922                                 goto nla_put_failure;
1923                         port->changed = false;
1924                 }
1925                 if ((port->removed &&
1926                      nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
1927                     (port->state.linkup &&
1928                      nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
1929                     nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
1930                     nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
1931                         goto nla_put_failure;
1932                 nla_nest_end(skb, port_item);
1933         }
1934
1935         nla_nest_end(skb, port_list);
1936         return genlmsg_end(skb, hdr);
1937
1938 nla_put_failure:
1939         genlmsg_cancel(skb, hdr);
1940         return -EMSGSIZE;
1941 }
1942
1943 static int team_nl_fill_port_list_get_all(struct sk_buff *skb,
1944                                           struct genl_info *info, int flags,
1945                                           struct team *team)
1946 {
1947         return team_nl_fill_port_list_get(skb, info->snd_pid,
1948                                           info->snd_seq, NLM_F_ACK,
1949                                           team, true);
1950 }
1951
1952 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
1953                                      struct genl_info *info)
1954 {
1955         struct team *team;
1956         int err;
1957
1958         team = team_nl_team_get(info);
1959         if (!team)
1960                 return -EINVAL;
1961
1962         err = team_nl_send_generic(info, team, team_nl_fill_port_list_get_all);
1963
1964         team_nl_team_put(team);
1965
1966         return err;
1967 }
1968
1969 static struct genl_ops team_nl_ops[] = {
1970         {
1971                 .cmd = TEAM_CMD_NOOP,
1972                 .doit = team_nl_cmd_noop,
1973                 .policy = team_nl_policy,
1974         },
1975         {
1976                 .cmd = TEAM_CMD_OPTIONS_SET,
1977                 .doit = team_nl_cmd_options_set,
1978                 .policy = team_nl_policy,
1979                 .flags = GENL_ADMIN_PERM,
1980         },
1981         {
1982                 .cmd = TEAM_CMD_OPTIONS_GET,
1983                 .doit = team_nl_cmd_options_get,
1984                 .policy = team_nl_policy,
1985                 .flags = GENL_ADMIN_PERM,
1986         },
1987         {
1988                 .cmd = TEAM_CMD_PORT_LIST_GET,
1989                 .doit = team_nl_cmd_port_list_get,
1990                 .policy = team_nl_policy,
1991                 .flags = GENL_ADMIN_PERM,
1992         },
1993 };
1994
1995 static struct genl_multicast_group team_change_event_mcgrp = {
1996         .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME,
1997 };
1998
1999 static int team_nl_send_multicast(struct sk_buff *skb,
2000                                   struct team *team, u32 pid)
2001 {
2002         return genlmsg_multicast_netns(dev_net(team->dev), skb, 0,
2003                                        team_change_event_mcgrp.id, GFP_KERNEL);
2004 }
2005
2006 static int team_nl_send_event_options_get(struct team *team,
2007                                           struct list_head *sel_opt_inst_list)
2008 {
2009         return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2010                                         sel_opt_inst_list);
2011 }
2012
2013 static int team_nl_send_event_port_list_get(struct team *team)
2014 {
2015         struct sk_buff *skb;
2016         int err;
2017         struct net *net = dev_net(team->dev);
2018
2019         skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
2020         if (!skb)
2021                 return -ENOMEM;
2022
2023         err = team_nl_fill_port_list_get(skb, 0, 0, 0, team, false);
2024         if (err < 0)
2025                 goto err_fill;
2026
2027         err = genlmsg_multicast_netns(net, skb, 0, team_change_event_mcgrp.id,
2028                                       GFP_KERNEL);
2029         return err;
2030
2031 err_fill:
2032         nlmsg_free(skb);
2033         return err;
2034 }
2035
2036 static int team_nl_init(void)
2037 {
2038         int err;
2039
2040         err = genl_register_family_with_ops(&team_nl_family, team_nl_ops,
2041                                             ARRAY_SIZE(team_nl_ops));
2042         if (err)
2043                 return err;
2044
2045         err = genl_register_mc_group(&team_nl_family, &team_change_event_mcgrp);
2046         if (err)
2047                 goto err_change_event_grp_reg;
2048
2049         return 0;
2050
2051 err_change_event_grp_reg:
2052         genl_unregister_family(&team_nl_family);
2053
2054         return err;
2055 }
2056
2057 static void team_nl_fini(void)
2058 {
2059         genl_unregister_family(&team_nl_family);
2060 }
2061
2062
2063 /******************
2064  * Change checkers
2065  ******************/
2066
2067 static void __team_options_change_check(struct team *team)
2068 {
2069         int err;
2070         struct team_option_inst *opt_inst;
2071         LIST_HEAD(sel_opt_inst_list);
2072
2073         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2074                 if (opt_inst->changed)
2075                         list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2076         }
2077         err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2078         if (err)
2079                 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2080                             err);
2081 }
2082
2083 /* rtnl lock is held */
2084 static void __team_port_change_check(struct team_port *port, bool linkup)
2085 {
2086         int err;
2087
2088         if (!port->removed && port->state.linkup == linkup)
2089                 return;
2090
2091         port->changed = true;
2092         port->state.linkup = linkup;
2093         team_refresh_port_linkup(port);
2094         if (linkup) {
2095                 struct ethtool_cmd ecmd;
2096
2097                 err = __ethtool_get_settings(port->dev, &ecmd);
2098                 if (!err) {
2099                         port->state.speed = ethtool_cmd_speed(&ecmd);
2100                         port->state.duplex = ecmd.duplex;
2101                         goto send_event;
2102                 }
2103         }
2104         port->state.speed = 0;
2105         port->state.duplex = 0;
2106
2107 send_event:
2108         err = team_nl_send_event_port_list_get(port->team);
2109         if (err)
2110                 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink\n",
2111                             port->dev->name);
2112
2113 }
2114
2115 static void team_port_change_check(struct team_port *port, bool linkup)
2116 {
2117         struct team *team = port->team;
2118
2119         mutex_lock(&team->lock);
2120         __team_port_change_check(port, linkup);
2121         mutex_unlock(&team->lock);
2122 }
2123
2124
2125 /************************************
2126  * Net device notifier event handler
2127  ************************************/
2128
2129 static int team_device_event(struct notifier_block *unused,
2130                              unsigned long event, void *ptr)
2131 {
2132         struct net_device *dev = (struct net_device *) ptr;
2133         struct team_port *port;
2134
2135         port = team_port_get_rtnl(dev);
2136         if (!port)
2137                 return NOTIFY_DONE;
2138
2139         switch (event) {
2140         case NETDEV_UP:
2141                 if (netif_carrier_ok(dev))
2142                         team_port_change_check(port, true);
2143         case NETDEV_DOWN:
2144                 team_port_change_check(port, false);
2145         case NETDEV_CHANGE:
2146                 if (netif_running(port->dev))
2147                         team_port_change_check(port,
2148                                                !!netif_carrier_ok(port->dev));
2149                 break;
2150         case NETDEV_UNREGISTER:
2151                 team_del_slave(port->team->dev, dev);
2152                 break;
2153         case NETDEV_FEAT_CHANGE:
2154                 team_compute_features(port->team);
2155                 break;
2156         case NETDEV_CHANGEMTU:
2157                 /* Forbid to change mtu of underlaying device */
2158                 return NOTIFY_BAD;
2159         case NETDEV_PRE_TYPE_CHANGE:
2160                 /* Forbid to change type of underlaying device */
2161                 return NOTIFY_BAD;
2162         }
2163         return NOTIFY_DONE;
2164 }
2165
2166 static struct notifier_block team_notifier_block __read_mostly = {
2167         .notifier_call = team_device_event,
2168 };
2169
2170
2171 /***********************
2172  * Module init and exit
2173  ***********************/
2174
2175 static int __init team_module_init(void)
2176 {
2177         int err;
2178
2179         register_netdevice_notifier(&team_notifier_block);
2180
2181         err = rtnl_link_register(&team_link_ops);
2182         if (err)
2183                 goto err_rtnl_reg;
2184
2185         err = team_nl_init();
2186         if (err)
2187                 goto err_nl_init;
2188
2189         return 0;
2190
2191 err_nl_init:
2192         rtnl_link_unregister(&team_link_ops);
2193
2194 err_rtnl_reg:
2195         unregister_netdevice_notifier(&team_notifier_block);
2196
2197         return err;
2198 }
2199
2200 static void __exit team_module_exit(void)
2201 {
2202         team_nl_fini();
2203         rtnl_link_unregister(&team_link_ops);
2204         unregister_netdevice_notifier(&team_notifier_block);
2205 }
2206
2207 module_init(team_module_init);
2208 module_exit(team_module_exit);
2209
2210 MODULE_LICENSE("GPL v2");
2211 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
2212 MODULE_DESCRIPTION("Ethernet team device driver");
2213 MODULE_ALIAS_RTNL_LINK(DRV_NAME);