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 static void __team_option_inst_change(struct team *team,
 324                                       struct team_option_inst *opt_inst);
 325
 326 int team_options_register(struct team *team,
 327                           const struct team_option *option,
 328                           size_t option_count)
 329 {
 330         int err;
 331
 332         err = __team_options_register(team, option, option_count);
 333         if (err)
 334                 return err;
 335         __team_options_change_check(team);
 336         return 0;
 337 }
 338 EXPORT_SYMBOL(team_options_register);
 339
 340 void team_options_unregister(struct team *team,
 341                              const struct team_option *option,
 342                              size_t option_count)
 343 {
 344         __team_options_mark_removed(team, option, option_count);
 345         __team_options_change_check(team);
 346         __team_options_unregister(team, option, option_count);
 347 }
 348 EXPORT_SYMBOL(team_options_unregister);
 349
 350 static int team_option_port_add(struct team *team, struct team_port *port)
 351 {
 352         int err;
 353
 354         err = __team_option_inst_add_port(team, port);
 355         if (err)
 356                 return err;
 357         __team_options_change_check(team);
 358         return 0;
 359 }
 360
 361 static void team_option_port_del(struct team *team, struct team_port *port)
 362 {
 363         __team_option_inst_mark_removed_port(team, port);
 364         __team_options_change_check(team);
 365         __team_option_inst_del_port(team, port);
 366 }
 367
 368 static int team_option_get(struct team *team,
 369                            struct team_option_inst *opt_inst,
 370                            struct team_gsetter_ctx *ctx)
 371 {
 372         if (!opt_inst->option->getter)
 373                 return -EOPNOTSUPP;
 374         return opt_inst->option->getter(team, ctx);
 375 }
 376
 377 static int team_option_set(struct team *team,
 378                            struct team_option_inst *opt_inst,
 379                            struct team_gsetter_ctx *ctx)
 380 {
 381         int err;
 382
 383         if (!opt_inst->option->setter)
 384                 return -EOPNOTSUPP;
 385         err = opt_inst->option->setter(team, ctx);
 386         if (err)
 387                 return err;
 388
 389         __team_option_inst_change(team, opt_inst);
 390         return err;
 391 }
 392
 393 void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info)
 394 {
 395         struct team_option_inst *opt_inst;
 396
 397         opt_inst = container_of(opt_inst_info, struct team_option_inst, info);
 398         opt_inst->changed = true;
 399 }
 400 EXPORT_SYMBOL(team_option_inst_set_change);
 401
 402 void team_options_change_check(struct team *team)
 403 {
 404         __team_options_change_check(team);
 405 }
 406 EXPORT_SYMBOL(team_options_change_check);
 407
 408
 409 /****************
 410  * Mode handling
 411  ****************/
 412
 413 static LIST_HEAD(mode_list);
 414 static DEFINE_SPINLOCK(mode_list_lock);
 415
 416 struct team_mode_item {
 417         struct list_head list;
 418         const struct team_mode *mode;
 419 };
 420
 421 static struct team_mode_item *__find_mode(const char *kind)
 422 {
 423         struct team_mode_item *mitem;
 424
 425         list_for_each_entry(mitem, &mode_list, list) {
 426                 if (strcmp(mitem->mode->kind, kind) == 0)
 427                         return mitem;
 428         }
 429         return NULL;
 430 }
 431
 432 static bool is_good_mode_name(const char *name)
 433 {
 434         while (*name != '\0') {
 435                 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
 436                         return false;
 437                 name++;
 438         }
 439         return true;
 440 }
 441
 442 int team_mode_register(const struct team_mode *mode)
 443 {
 444         int err = 0;
 445         struct team_mode_item *mitem;
 446
 447         if (!is_good_mode_name(mode->kind) ||
 448             mode->priv_size > TEAM_MODE_PRIV_SIZE)
 449                 return -EINVAL;
 450
 451         mitem = kmalloc(sizeof(*mitem), GFP_KERNEL);
 452         if (!mitem)
 453                 return -ENOMEM;
 454
 455         spin_lock(&mode_list_lock);
 456         if (__find_mode(mode->kind)) {
 457                 err = -EEXIST;
 458                 kfree(mitem);
 459                 goto unlock;
 460         }
 461         mitem->mode = mode;
 462         list_add_tail(&mitem->list, &mode_list);
 463 unlock:
 464         spin_unlock(&mode_list_lock);
 465         return err;
 466 }
 467 EXPORT_SYMBOL(team_mode_register);
 468
 469 void team_mode_unregister(const struct team_mode *mode)
 470 {
 471         struct team_mode_item *mitem;
 472
 473         spin_lock(&mode_list_lock);
 474         mitem = __find_mode(mode->kind);
 475         if (mitem) {
 476                 list_del_init(&mitem->list);
 477                 kfree(mitem);
 478         }
 479         spin_unlock(&mode_list_lock);
 480 }
 481 EXPORT_SYMBOL(team_mode_unregister);
 482
 483 static const struct team_mode *team_mode_get(const char *kind)
 484 {
 485         struct team_mode_item *mitem;
 486         const struct team_mode *mode = NULL;
 487
 488         spin_lock(&mode_list_lock);
 489         mitem = __find_mode(kind);
 490         if (!mitem) {
 491                 spin_unlock(&mode_list_lock);
 492                 request_module("team-mode-%s", kind);
 493                 spin_lock(&mode_list_lock);
 494                 mitem = __find_mode(kind);
 495         }
 496         if (mitem) {
 497                 mode = mitem->mode;
 498                 if (!try_module_get(mode->owner))
 499                         mode = NULL;
 500         }
 501
 502         spin_unlock(&mode_list_lock);
 503         return mode;
 504 }
 505
 506 static void team_mode_put(const struct team_mode *mode)
 507 {
 508         module_put(mode->owner);
 509 }
 510
 511 static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
 512 {
 513         dev_kfree_skb_any(skb);
 514         return false;
 515 }
 516
 517 rx_handler_result_t team_dummy_receive(struct team *team,
 518                                        struct team_port *port,
 519                                        struct sk_buff *skb)
 520 {
 521         return RX_HANDLER_ANOTHER;
 522 }
 523
 524 static const struct team_mode __team_no_mode = {
 525         .kind           = "*NOMODE*",
 526 };
 527
 528 static bool team_is_mode_set(struct team *team)
 529 {
 530         return team->mode != &__team_no_mode;
 531 }
 532
 533 static void team_set_no_mode(struct team *team)
 534 {
 535         team->mode = &__team_no_mode;
 536 }
 537
 538 static void team_adjust_ops(struct team *team)
 539 {
 540         /*
 541          * To avoid checks in rx/tx skb paths, ensure here that non-null and
 542          * correct ops are always set.
 543          */
 544
 545         if (list_empty(&team->port_list) ||
 546             !team_is_mode_set(team) || !team->mode->ops->transmit)
 547                 team->ops.transmit = team_dummy_transmit;
 548         else
 549                 team->ops.transmit = team->mode->ops->transmit;
 550
 551         if (list_empty(&team->port_list) ||
 552             !team_is_mode_set(team) || !team->mode->ops->receive)
 553                 team->ops.receive = team_dummy_receive;
 554         else
 555                 team->ops.receive = team->mode->ops->receive;
 556 }
 557
 558 /*
 559  * We can benefit from the fact that it's ensured no port is present
 560  * at the time of mode change. Therefore no packets are in fly so there's no
 561  * need to set mode operations in any special way.
 562  */
 563 static int __team_change_mode(struct team *team,
 564                               const struct team_mode *new_mode)
 565 {
 566         /* Check if mode was previously set and do cleanup if so */
 567         if (team_is_mode_set(team)) {
 568                 void (*exit_op)(struct team *team) = team->ops.exit;
 569
 570                 /* Clear ops area so no callback is called any longer */
 571                 memset(&team->ops, 0, sizeof(struct team_mode_ops));
 572                 team_adjust_ops(team);
 573
 574                 if (exit_op)
 575                         exit_op(team);
 576                 team_mode_put(team->mode);
 577                 team_set_no_mode(team);
 578                 /* zero private data area */
 579                 memset(&team->mode_priv, 0,
 580                        sizeof(struct team) - offsetof(struct team, mode_priv));
 581         }
 582
 583         if (!new_mode)
 584                 return 0;
 585
 586         if (new_mode->ops->init) {
 587                 int err;
 588
 589                 err = new_mode->ops->init(team);
 590                 if (err)
 591                         return err;
 592         }
 593
 594         team->mode = new_mode;
 595         memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
 596         team_adjust_ops(team);
 597
 598         return 0;
 599 }
 600
 601 static int team_change_mode(struct team *team, const char *kind)
 602 {
 603         const struct team_mode *new_mode;
 604         struct net_device *dev = team->dev;
 605         int err;
 606
 607         if (!list_empty(&team->port_list)) {
 608                 netdev_err(dev, "No ports can be present during mode change\n");
 609                 return -EBUSY;
 610         }
 611
 612         if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) {
 613                 netdev_err(dev, "Unable to change to the same mode the team is in\n");
 614                 return -EINVAL;
 615         }
 616
 617         new_mode = team_mode_get(kind);
 618         if (!new_mode) {
 619                 netdev_err(dev, "Mode \"%s\" not found\n", kind);
 620                 return -EINVAL;
 621         }
 622
 623         err = __team_change_mode(team, new_mode);
 624         if (err) {
 625                 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
 626                 team_mode_put(new_mode);
 627                 return err;
 628         }
 629
 630         netdev_info(dev, "Mode changed to \"%s\"\n", kind);
 631         return 0;
 632 }
 633
 634
 635 /************************
 636  * Rx path frame handler
 637  ************************/
 638
 639 static bool team_port_enabled(struct team_port *port);
 640
 641 /* note: already called with rcu_read_lock */
 642 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
 643 {
 644         struct sk_buff *skb = *pskb;
 645         struct team_port *port;
 646         struct team *team;
 647         rx_handler_result_t res;
 648
 649         skb = skb_share_check(skb, GFP_ATOMIC);
 650         if (!skb)
 651                 return RX_HANDLER_CONSUMED;
 652
 653         *pskb = skb;
 654
 655         port = team_port_get_rcu(skb->dev);
 656         team = port->team;
 657         if (!team_port_enabled(port)) {
 658                 /* allow exact match delivery for disabled ports */
 659                 res = RX_HANDLER_EXACT;
 660         } else {
 661                 res = team->ops.receive(team, port, skb);
 662         }
 663         if (res == RX_HANDLER_ANOTHER) {
 664                 struct team_pcpu_stats *pcpu_stats;
 665
 666                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
 667                 u64_stats_update_begin(&pcpu_stats->syncp);
 668                 pcpu_stats->rx_packets++;
 669                 pcpu_stats->rx_bytes += skb->len;
 670                 if (skb->pkt_type == PACKET_MULTICAST)
 671                         pcpu_stats->rx_multicast++;
 672                 u64_stats_update_end(&pcpu_stats->syncp);
 673
 674                 skb->dev = team->dev;
 675         } else {
 676                 this_cpu_inc(team->pcpu_stats->rx_dropped);
 677         }
 678
 679         return res;
 680 }
 681
 682
 683 /****************
 684  * Port handling
 685  ****************/
 686
 687 static bool team_port_find(const struct team *team,
 688                            const struct team_port *port)
 689 {
 690         struct team_port *cur;
 691
 692         list_for_each_entry(cur, &team->port_list, list)
 693                 if (cur == port)
 694                         return true;
 695         return false;
 696 }
 697
 698 static bool team_port_enabled(struct team_port *port)
 699 {
 700         return port->index != -1;
 701 }
 702
 703 /*
 704  * Enable/disable port by adding to enabled port hashlist and setting
 705  * port->index (Might be racy so reader could see incorrect ifindex when
 706  * processing a flying packet, but that is not a problem). Write guarded
 707  * by team->lock.
 708  */
 709 static void team_port_enable(struct team *team,
 710                              struct team_port *port)
 711 {
 712         if (team_port_enabled(port))
 713                 return;
 714         port->index = team->en_port_count++;
 715         hlist_add_head_rcu(&port->hlist,
 716                            team_port_index_hash(team, port->index));
 717         if (team->ops.port_enabled)
 718                 team->ops.port_enabled(team, port);
 719 }
 720
 721 static void __reconstruct_port_hlist(struct team *team, int rm_index)
 722 {
 723         int i;
 724         struct team_port *port;
 725
 726         for (i = rm_index + 1; i < team->en_port_count; i++) {
 727                 port = team_get_port_by_index(team, i);
 728                 hlist_del_rcu(&port->hlist);
 729                 port->index--;
 730                 hlist_add_head_rcu(&port->hlist,
 731                                    team_port_index_hash(team, port->index));
 732         }
 733 }
 734
 735 static void team_port_disable(struct team *team,
 736                               struct team_port *port)
 737 {
 738         int rm_index = port->index;
 739
 740         if (!team_port_enabled(port))
 741                 return;
 742         if (team->ops.port_disabled)
 743                 team->ops.port_disabled(team, port);
 744         hlist_del_rcu(&port->hlist);
 745         __reconstruct_port_hlist(team, rm_index);
 746         team->en_port_count--;
 747         port->index = -1;
 748 }
 749
 750 #define TEAM_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \
 751                             NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
 752                             NETIF_F_HIGHDMA | NETIF_F_LRO)
 753
 754 static void __team_compute_features(struct team *team)
 755 {
 756         struct team_port *port;
 757         u32 vlan_features = TEAM_VLAN_FEATURES;
 758         unsigned short max_hard_header_len = ETH_HLEN;
 759
 760         list_for_each_entry(port, &team->port_list, list) {
 761                 vlan_features = netdev_increment_features(vlan_features,
 762                                         port->dev->vlan_features,
 763                                         TEAM_VLAN_FEATURES);
 764
 765                 if (port->dev->hard_header_len > max_hard_header_len)
 766                         max_hard_header_len = port->dev->hard_header_len;
 767         }
 768
 769         team->dev->vlan_features = vlan_features;
 770         team->dev->hard_header_len = max_hard_header_len;
 771
 772         netdev_change_features(team->dev);
 773 }
 774
 775 static void team_compute_features(struct team *team)
 776 {
 777         mutex_lock(&team->lock);
 778         __team_compute_features(team);
 779         mutex_unlock(&team->lock);
 780 }
 781
 782 static int team_port_enter(struct team *team, struct team_port *port)
 783 {
 784         int err = 0;
 785
 786         dev_hold(team->dev);
 787         port->dev->priv_flags |= IFF_TEAM_PORT;
 788         if (team->ops.port_enter) {
 789                 err = team->ops.port_enter(team, port);
 790                 if (err) {
 791                         netdev_err(team->dev, "Device %s failed to enter team mode\n",
 792                                    port->dev->name);
 793                         goto err_port_enter;
 794                 }
 795         }
 796
 797         return 0;
 798
 799 err_port_enter:
 800         port->dev->priv_flags &= ~IFF_TEAM_PORT;
 801         dev_put(team->dev);
 802
 803         return err;
 804 }
 805
 806 static void team_port_leave(struct team *team, struct team_port *port)
 807 {
 808         if (team->ops.port_leave)
 809                 team->ops.port_leave(team, port);
 810         port->dev->priv_flags &= ~IFF_TEAM_PORT;
 811         dev_put(team->dev);
 812 }
 813
 814 static void __team_port_change_check(struct team_port *port, bool linkup);
 815
 816 static int team_port_add(struct team *team, struct net_device *port_dev)
 817 {
 818         struct net_device *dev = team->dev;
 819         struct team_port *port;
 820         char *portname = port_dev->name;
 821         int err;
 822
 823         if (port_dev->flags & IFF_LOOPBACK ||
 824             port_dev->type != ARPHRD_ETHER) {
 825                 netdev_err(dev, "Device %s is of an unsupported type\n",
 826                            portname);
 827                 return -EINVAL;
 828         }
 829
 830         if (team_port_exists(port_dev)) {
 831                 netdev_err(dev, "Device %s is already a port "
 832                                 "of a team device\n", portname);
 833                 return -EBUSY;
 834         }
 835
 836         if (port_dev->flags & IFF_UP) {
 837                 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
 838                            portname);
 839                 return -EBUSY;
 840         }
 841
 842         port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
 843                        GFP_KERNEL);
 844         if (!port)
 845                 return -ENOMEM;
 846
 847         port->dev = port_dev;
 848         port->team = team;
 849
 850         port->orig.mtu = port_dev->mtu;
 851         err = dev_set_mtu(port_dev, dev->mtu);
 852         if (err) {
 853                 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
 854                 goto err_set_mtu;
 855         }
 856
 857         memcpy(port->orig.dev_addr, port_dev->dev_addr, ETH_ALEN);
 858
 859         err = team_port_enter(team, port);
 860         if (err) {
 861                 netdev_err(dev, "Device %s failed to enter team mode\n",
 862                            portname);
 863                 goto err_port_enter;
 864         }
 865
 866         err = dev_open(port_dev);
 867         if (err) {
 868                 netdev_dbg(dev, "Device %s opening failed\n",
 869                            portname);
 870                 goto err_dev_open;
 871         }
 872
 873         err = vlan_vids_add_by_dev(port_dev, dev);
 874         if (err) {
 875                 netdev_err(dev, "Failed to add vlan ids to device %s\n",
 876                                 portname);
 877                 goto err_vids_add;
 878         }
 879
 880         err = netdev_set_master(port_dev, dev);
 881         if (err) {
 882                 netdev_err(dev, "Device %s failed to set master\n", portname);
 883                 goto err_set_master;
 884         }
 885
 886         err = netdev_rx_handler_register(port_dev, team_handle_frame,
 887                                          port);
 888         if (err) {
 889                 netdev_err(dev, "Device %s failed to register rx_handler\n",
 890                            portname);
 891                 goto err_handler_register;
 892         }
 893
 894         err = team_option_port_add(team, port);
 895         if (err) {
 896                 netdev_err(dev, "Device %s failed to add per-port options\n",
 897                            portname);
 898                 goto err_option_port_add;
 899         }
 900
 901         port->index = -1;
 902         team_port_enable(team, port);
 903         list_add_tail_rcu(&port->list, &team->port_list);
 904         team_adjust_ops(team);
 905         __team_compute_features(team);
 906         __team_port_change_check(port, !!netif_carrier_ok(port_dev));
 907
 908         netdev_info(dev, "Port device %s added\n", portname);
 909
 910         return 0;
 911
 912 err_option_port_add:
 913         netdev_rx_handler_unregister(port_dev);
 914
 915 err_handler_register:
 916         netdev_set_master(port_dev, NULL);
 917
 918 err_set_master:
 919         vlan_vids_del_by_dev(port_dev, dev);
 920
 921 err_vids_add:
 922         dev_close(port_dev);
 923
 924 err_dev_open:
 925         team_port_leave(team, port);
 926         team_port_set_orig_mac(port);
 927
 928 err_port_enter:
 929         dev_set_mtu(port_dev, port->orig.mtu);
 930
 931 err_set_mtu:
 932         kfree(port);
 933
 934         return err;
 935 }
 936
 937 static int team_port_del(struct team *team, struct net_device *port_dev)
 938 {
 939         struct net_device *dev = team->dev;
 940         struct team_port *port;
 941         char *portname = port_dev->name;
 942
 943         port = team_port_get_rtnl(port_dev);
 944         if (!port || !team_port_find(team, port)) {
 945                 netdev_err(dev, "Device %s does not act as a port of this team\n",
 946                            portname);
 947                 return -ENOENT;
 948         }
 949
 950         port->removed = true;
 951         __team_port_change_check(port, false);
 952         team_port_disable(team, port);
 953         list_del_rcu(&port->list);
 954         team_adjust_ops(team);
 955         team_option_port_del(team, port);
 956         netdev_rx_handler_unregister(port_dev);
 957         netdev_set_master(port_dev, NULL);
 958         vlan_vids_del_by_dev(port_dev, dev);
 959         dev_close(port_dev);
 960         team_port_leave(team, port);
 961         team_port_set_orig_mac(port);
 962         dev_set_mtu(port_dev, port->orig.mtu);
 963         synchronize_rcu();
 964         kfree(port);
 965         netdev_info(dev, "Port device %s removed\n", portname);
 966         __team_compute_features(team);
 967
 968         return 0;
 969 }
 970
 971
 972 /*****************
 973  * Net device ops
 974  *****************/
 975
 976 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
 977 {
 978         ctx->data.str_val = team->mode->kind;
 979         return 0;
 980 }
 981
 982 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
 983 {
 984         return team_change_mode(team, ctx->data.str_val);
 985 }
 986
 987 static int team_port_en_option_get(struct team *team,
 988                                    struct team_gsetter_ctx *ctx)
 989 {
 990         struct team_port *port = ctx->info->port;
 991
 992         ctx->data.bool_val = team_port_enabled(port);
 993         return 0;
 994 }
 995
 996 static int team_port_en_option_set(struct team *team,
 997                                    struct team_gsetter_ctx *ctx)
 998 {
 999         struct team_port *port = ctx->info->port;
1000
1001         if (ctx->data.bool_val)
1002                 team_port_enable(team, port);
1003         else
1004                 team_port_disable(team, port);
1005         return 0;
1006 }
1007
1008 static int team_user_linkup_option_get(struct team *team,
1009                                        struct team_gsetter_ctx *ctx)
1010 {
1011         struct team_port *port = ctx->info->port;
1012
1013         ctx->data.bool_val = port->user.linkup;
1014         return 0;
1015 }
1016
1017 static int team_user_linkup_option_set(struct team *team,
1018                                        struct team_gsetter_ctx *ctx)
1019 {
1020         struct team_port *port = ctx->info->port;
1021
1022         port->user.linkup = ctx->data.bool_val;
1023         team_refresh_port_linkup(port);
1024         return 0;
1025 }
1026
1027 static int team_user_linkup_en_option_get(struct team *team,
1028                                           struct team_gsetter_ctx *ctx)
1029 {
1030         struct team_port *port = ctx->info->port;
1031
1032         ctx->data.bool_val = port->user.linkup_enabled;
1033         return 0;
1034 }
1035
1036 static int team_user_linkup_en_option_set(struct team *team,
1037                                           struct team_gsetter_ctx *ctx)
1038 {
1039         struct team_port *port = ctx->info->port;
1040
1041         port->user.linkup_enabled = ctx->data.bool_val;
1042         team_refresh_port_linkup(port);
1043         return 0;
1044 }
1045
1046 static const struct team_option team_options[] = {
1047         {
1048                 .name = "mode",
1049                 .type = TEAM_OPTION_TYPE_STRING,
1050                 .getter = team_mode_option_get,
1051                 .setter = team_mode_option_set,
1052         },
1053         {
1054                 .name = "enabled",
1055                 .type = TEAM_OPTION_TYPE_BOOL,
1056                 .per_port = true,
1057                 .getter = team_port_en_option_get,
1058                 .setter = team_port_en_option_set,
1059         },
1060         {
1061                 .name = "user_linkup",
1062                 .type = TEAM_OPTION_TYPE_BOOL,
1063                 .per_port = true,
1064                 .getter = team_user_linkup_option_get,
1065                 .setter = team_user_linkup_option_set,
1066         },
1067         {
1068                 .name = "user_linkup_enabled",
1069                 .type = TEAM_OPTION_TYPE_BOOL,
1070                 .per_port = true,
1071                 .getter = team_user_linkup_en_option_get,
1072                 .setter = team_user_linkup_en_option_set,
1073         },
1074 };
1075
1076 static int team_init(struct net_device *dev)
1077 {
1078         struct team *team = netdev_priv(dev);
1079         int i;
1080         int err;
1081
1082         team->dev = dev;
1083         mutex_init(&team->lock);
1084         team_set_no_mode(team);
1085
1086         team->pcpu_stats = alloc_percpu(struct team_pcpu_stats);
1087         if (!team->pcpu_stats)
1088                 return -ENOMEM;
1089
1090         for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1091                 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1092         INIT_LIST_HEAD(&team->port_list);
1093
1094         team_adjust_ops(team);
1095
1096         INIT_LIST_HEAD(&team->option_list);
1097         INIT_LIST_HEAD(&team->option_inst_list);
1098         err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1099         if (err)
1100                 goto err_options_register;
1101         netif_carrier_off(dev);
1102
1103         return 0;
1104
1105 err_options_register:
1106         free_percpu(team->pcpu_stats);
1107
1108         return err;
1109 }
1110
1111 static void team_uninit(struct net_device *dev)
1112 {
1113         struct team *team = netdev_priv(dev);
1114         struct team_port *port;
1115         struct team_port *tmp;
1116
1117         mutex_lock(&team->lock);
1118         list_for_each_entry_safe(port, tmp, &team->port_list, list)
1119                 team_port_del(team, port->dev);
1120
1121         __team_change_mode(team, NULL); /* cleanup */
1122         __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1123         mutex_unlock(&team->lock);
1124 }
1125
1126 static void team_destructor(struct net_device *dev)
1127 {
1128         struct team *team = netdev_priv(dev);
1129
1130         free_percpu(team->pcpu_stats);
1131         free_netdev(dev);
1132 }
1133
1134 static int team_open(struct net_device *dev)
1135 {
1136         netif_carrier_on(dev);
1137         return 0;
1138 }
1139
1140 static int team_close(struct net_device *dev)
1141 {
1142         netif_carrier_off(dev);
1143         return 0;
1144 }
1145
1146 /*
1147  * note: already called with rcu_read_lock
1148  */
1149 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1150 {
1151         struct team *team = netdev_priv(dev);
1152         bool tx_success = false;
1153         unsigned int len = skb->len;
1154
1155         tx_success = team->ops.transmit(team, skb);
1156         if (tx_success) {
1157                 struct team_pcpu_stats *pcpu_stats;
1158
1159                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1160                 u64_stats_update_begin(&pcpu_stats->syncp);
1161                 pcpu_stats->tx_packets++;
1162                 pcpu_stats->tx_bytes += len;
1163                 u64_stats_update_end(&pcpu_stats->syncp);
1164         } else {
1165                 this_cpu_inc(team->pcpu_stats->tx_dropped);
1166         }
1167
1168         return NETDEV_TX_OK;
1169 }
1170
1171 static void team_change_rx_flags(struct net_device *dev, int change)
1172 {
1173         struct team *team = netdev_priv(dev);
1174         struct team_port *port;
1175         int inc;
1176
1177         rcu_read_lock();
1178         list_for_each_entry_rcu(port, &team->port_list, list) {
1179                 if (change & IFF_PROMISC) {
1180                         inc = dev->flags & IFF_PROMISC ? 1 : -1;
1181                         dev_set_promiscuity(port->dev, inc);
1182                 }
1183                 if (change & IFF_ALLMULTI) {
1184                         inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1185                         dev_set_allmulti(port->dev, inc);
1186                 }
1187         }
1188         rcu_read_unlock();
1189 }
1190
1191 static void team_set_rx_mode(struct net_device *dev)
1192 {
1193         struct team *team = netdev_priv(dev);
1194         struct team_port *port;
1195
1196         rcu_read_lock();
1197         list_for_each_entry_rcu(port, &team->port_list, list) {
1198                 dev_uc_sync(port->dev, dev);
1199                 dev_mc_sync(port->dev, dev);
1200         }
1201         rcu_read_unlock();
1202 }
1203
1204 static int team_set_mac_address(struct net_device *dev, void *p)
1205 {
1206         struct team *team = netdev_priv(dev);
1207         struct team_port *port;
1208         struct sockaddr *addr = p;
1209
1210         dev->addr_assign_type &= ~NET_ADDR_RANDOM;
1211         memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
1212         rcu_read_lock();
1213         list_for_each_entry_rcu(port, &team->port_list, list)
1214                 if (team->ops.port_change_mac)
1215                         team->ops.port_change_mac(team, port);
1216         rcu_read_unlock();
1217         return 0;
1218 }
1219
1220 static int team_change_mtu(struct net_device *dev, int new_mtu)
1221 {
1222         struct team *team = netdev_priv(dev);
1223         struct team_port *port;
1224         int err;
1225
1226         /*
1227          * Alhough this is reader, it's guarded by team lock. It's not possible
1228          * to traverse list in reverse under rcu_read_lock
1229          */
1230         mutex_lock(&team->lock);
1231         list_for_each_entry(port, &team->port_list, list) {
1232                 err = dev_set_mtu(port->dev, new_mtu);
1233                 if (err) {
1234                         netdev_err(dev, "Device %s failed to change mtu",
1235                                    port->dev->name);
1236                         goto unwind;
1237                 }
1238         }
1239         mutex_unlock(&team->lock);
1240
1241         dev->mtu = new_mtu;
1242
1243         return 0;
1244
1245 unwind:
1246         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1247                 dev_set_mtu(port->dev, dev->mtu);
1248         mutex_unlock(&team->lock);
1249
1250         return err;
1251 }
1252
1253 static struct rtnl_link_stats64 *
1254 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1255 {
1256         struct team *team = netdev_priv(dev);
1257         struct team_pcpu_stats *p;
1258         u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1259         u32 rx_dropped = 0, tx_dropped = 0;
1260         unsigned int start;
1261         int i;
1262
1263         for_each_possible_cpu(i) {
1264                 p = per_cpu_ptr(team->pcpu_stats, i);
1265                 do {
1266                         start = u64_stats_fetch_begin_bh(&p->syncp);
1267                         rx_packets      = p->rx_packets;
1268                         rx_bytes        = p->rx_bytes;
1269                         rx_multicast    = p->rx_multicast;
1270                         tx_packets      = p->tx_packets;
1271                         tx_bytes        = p->tx_bytes;
1272                 } while (u64_stats_fetch_retry_bh(&p->syncp, start));
1273
1274                 stats->rx_packets       += rx_packets;
1275                 stats->rx_bytes         += rx_bytes;
1276                 stats->multicast        += rx_multicast;
1277                 stats->tx_packets       += tx_packets;
1278                 stats->tx_bytes         += tx_bytes;
1279                 /*
1280                  * rx_dropped & tx_dropped are u32, updated
1281                  * without syncp protection.
1282                  */
1283                 rx_dropped      += p->rx_dropped;
1284                 tx_dropped      += p->tx_dropped;
1285         }
1286         stats->rx_dropped       = rx_dropped;
1287         stats->tx_dropped       = tx_dropped;
1288         return stats;
1289 }
1290
1291 static int team_vlan_rx_add_vid(struct net_device *dev, uint16_t vid)
1292 {
1293         struct team *team = netdev_priv(dev);
1294         struct team_port *port;
1295         int err;
1296
1297         /*
1298          * Alhough this is reader, it's guarded by team lock. It's not possible
1299          * to traverse list in reverse under rcu_read_lock
1300          */
1301         mutex_lock(&team->lock);
1302         list_for_each_entry(port, &team->port_list, list) {
1303                 err = vlan_vid_add(port->dev, vid);
1304                 if (err)
1305                         goto unwind;
1306         }
1307         mutex_unlock(&team->lock);
1308
1309         return 0;
1310
1311 unwind:
1312         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1313                 vlan_vid_del(port->dev, vid);
1314         mutex_unlock(&team->lock);
1315
1316         return err;
1317 }
1318
1319 static int team_vlan_rx_kill_vid(struct net_device *dev, uint16_t vid)
1320 {
1321         struct team *team = netdev_priv(dev);
1322         struct team_port *port;
1323
1324         rcu_read_lock();
1325         list_for_each_entry_rcu(port, &team->port_list, list)
1326                 vlan_vid_del(port->dev, vid);
1327         rcu_read_unlock();
1328
1329         return 0;
1330 }
1331
1332 static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
1333 {
1334         struct team *team = netdev_priv(dev);
1335         int err;
1336
1337         mutex_lock(&team->lock);
1338         err = team_port_add(team, port_dev);
1339         mutex_unlock(&team->lock);
1340         return err;
1341 }
1342
1343 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1344 {
1345         struct team *team = netdev_priv(dev);
1346         int err;
1347
1348         mutex_lock(&team->lock);
1349         err = team_port_del(team, port_dev);
1350         mutex_unlock(&team->lock);
1351         return err;
1352 }
1353
1354 static netdev_features_t team_fix_features(struct net_device *dev,
1355                                            netdev_features_t features)
1356 {
1357         struct team_port *port;
1358         struct team *team = netdev_priv(dev);
1359         netdev_features_t mask;
1360
1361         mask = features;
1362         features &= ~NETIF_F_ONE_FOR_ALL;
1363         features |= NETIF_F_ALL_FOR_ALL;
1364
1365         rcu_read_lock();
1366         list_for_each_entry_rcu(port, &team->port_list, list) {
1367                 features = netdev_increment_features(features,
1368                                                      port->dev->features,
1369                                                      mask);
1370         }
1371         rcu_read_unlock();
1372         return features;
1373 }
1374
1375 static const struct net_device_ops team_netdev_ops = {
1376         .ndo_init               = team_init,
1377         .ndo_uninit             = team_uninit,
1378         .ndo_open               = team_open,
1379         .ndo_stop               = team_close,
1380         .ndo_start_xmit         = team_xmit,
1381         .ndo_change_rx_flags    = team_change_rx_flags,
1382         .ndo_set_rx_mode        = team_set_rx_mode,
1383         .ndo_set_mac_address    = team_set_mac_address,
1384         .ndo_change_mtu         = team_change_mtu,
1385         .ndo_get_stats64        = team_get_stats64,
1386         .ndo_vlan_rx_add_vid    = team_vlan_rx_add_vid,
1387         .ndo_vlan_rx_kill_vid   = team_vlan_rx_kill_vid,
1388         .ndo_add_slave          = team_add_slave,
1389         .ndo_del_slave          = team_del_slave,
1390         .ndo_fix_features       = team_fix_features,
1391 };
1392
1393
1394 /***********************
1395  * rt netlink interface
1396  ***********************/
1397
1398 static void team_setup(struct net_device *dev)
1399 {
1400         ether_setup(dev);
1401
1402         dev->netdev_ops = &team_netdev_ops;
1403         dev->destructor = team_destructor;
1404         dev->tx_queue_len = 0;
1405         dev->flags |= IFF_MULTICAST;
1406         dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
1407
1408         /*
1409          * Indicate we support unicast address filtering. That way core won't
1410          * bring us to promisc mode in case a unicast addr is added.
1411          * Let this up to underlay drivers.
1412          */
1413         dev->priv_flags |= IFF_UNICAST_FLT;
1414
1415         dev->features |= NETIF_F_LLTX;
1416         dev->features |= NETIF_F_GRO;
1417         dev->hw_features = NETIF_F_HW_VLAN_TX |
1418                            NETIF_F_HW_VLAN_RX |
1419                            NETIF_F_HW_VLAN_FILTER;
1420
1421         dev->features |= dev->hw_features;
1422 }
1423
1424 static int team_newlink(struct net *src_net, struct net_device *dev,
1425                         struct nlattr *tb[], struct nlattr *data[])
1426 {
1427         int err;
1428
1429         if (tb[IFLA_ADDRESS] == NULL)
1430                 eth_hw_addr_random(dev);
1431
1432         err = register_netdevice(dev);
1433         if (err)
1434                 return err;
1435
1436         return 0;
1437 }
1438
1439 static int team_validate(struct nlattr *tb[], struct nlattr *data[])
1440 {
1441         if (tb[IFLA_ADDRESS]) {
1442                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
1443                         return -EINVAL;
1444                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
1445                         return -EADDRNOTAVAIL;
1446         }
1447         return 0;
1448 }
1449
1450 static struct rtnl_link_ops team_link_ops __read_mostly = {
1451         .kind           = DRV_NAME,
1452         .priv_size      = sizeof(struct team),
1453         .setup          = team_setup,
1454         .newlink        = team_newlink,
1455         .validate       = team_validate,
1456 };
1457
1458
1459 /***********************************
1460  * Generic netlink custom interface
1461  ***********************************/
1462
1463 static struct genl_family team_nl_family = {
1464         .id             = GENL_ID_GENERATE,
1465         .name           = TEAM_GENL_NAME,
1466         .version        = TEAM_GENL_VERSION,
1467         .maxattr        = TEAM_ATTR_MAX,
1468         .netnsok        = true,
1469 };
1470
1471 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
1472         [TEAM_ATTR_UNSPEC]                      = { .type = NLA_UNSPEC, },
1473         [TEAM_ATTR_TEAM_IFINDEX]                = { .type = NLA_U32 },
1474         [TEAM_ATTR_LIST_OPTION]                 = { .type = NLA_NESTED },
1475         [TEAM_ATTR_LIST_PORT]                   = { .type = NLA_NESTED },
1476 };
1477
1478 static const struct nla_policy
1479 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
1480         [TEAM_ATTR_OPTION_UNSPEC]               = { .type = NLA_UNSPEC, },
1481         [TEAM_ATTR_OPTION_NAME] = {
1482                 .type = NLA_STRING,
1483                 .len = TEAM_STRING_MAX_LEN,
1484         },
1485         [TEAM_ATTR_OPTION_CHANGED]              = { .type = NLA_FLAG },
1486         [TEAM_ATTR_OPTION_TYPE]                 = { .type = NLA_U8 },
1487         [TEAM_ATTR_OPTION_DATA]                 = { .type = NLA_BINARY },
1488 };
1489
1490 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
1491 {
1492         struct sk_buff *msg;
1493         void *hdr;
1494         int err;
1495
1496         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1497         if (!msg)
1498                 return -ENOMEM;
1499
1500         hdr = genlmsg_put(msg, info->snd_pid, info->snd_seq,
1501                           &team_nl_family, 0, TEAM_CMD_NOOP);
1502         if (IS_ERR(hdr)) {
1503                 err = PTR_ERR(hdr);
1504                 goto err_msg_put;
1505         }
1506
1507         genlmsg_end(msg, hdr);
1508
1509         return genlmsg_unicast(genl_info_net(info), msg, info->snd_pid);
1510
1511 err_msg_put:
1512         nlmsg_free(msg);
1513
1514         return err;
1515 }
1516
1517 /*
1518  * Netlink cmd functions should be locked by following two functions.
1519  * Since dev gets held here, that ensures dev won't disappear in between.
1520  */
1521 static struct team *team_nl_team_get(struct genl_info *info)
1522 {
1523         struct net *net = genl_info_net(info);
1524         int ifindex;
1525         struct net_device *dev;
1526         struct team *team;
1527
1528         if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
1529                 return NULL;
1530
1531         ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
1532         dev = dev_get_by_index(net, ifindex);
1533         if (!dev || dev->netdev_ops != &team_netdev_ops) {
1534                 if (dev)
1535                         dev_put(dev);
1536                 return NULL;
1537         }
1538
1539         team = netdev_priv(dev);
1540         mutex_lock(&team->lock);
1541         return team;
1542 }
1543
1544 static void team_nl_team_put(struct team *team)
1545 {
1546         mutex_unlock(&team->lock);
1547         dev_put(team->dev);
1548 }
1549
1550 static int team_nl_send_generic(struct genl_info *info, struct team *team,
1551                                 int (*fill_func)(struct sk_buff *skb,
1552                                                  struct genl_info *info,
1553                                                  int flags, struct team *team))
1554 {
1555         struct sk_buff *skb;
1556         int err;
1557
1558         skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1559         if (!skb)
1560                 return -ENOMEM;
1561
1562         err = fill_func(skb, info, NLM_F_ACK, team);
1563         if (err < 0)
1564                 goto err_fill;
1565
1566         err = genlmsg_unicast(genl_info_net(info), skb, info->snd_pid);
1567         return err;
1568
1569 err_fill:
1570         nlmsg_free(skb);
1571         return err;
1572 }
1573
1574 typedef int team_nl_send_func_t(struct sk_buff *skb,
1575                                 struct team *team, u32 pid);
1576
1577 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 pid)
1578 {
1579         return genlmsg_unicast(dev_net(team->dev), skb, pid);
1580 }
1581
1582 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
1583                                        struct team_option_inst *opt_inst)
1584 {
1585         struct nlattr *option_item;
1586         struct team_option *option = opt_inst->option;
1587         struct team_option_inst_info *opt_inst_info = &opt_inst->info;
1588         struct team_gsetter_ctx ctx;
1589         int err;
1590
1591         ctx.info = opt_inst_info;
1592         err = team_option_get(team, opt_inst, &ctx);
1593         if (err)
1594                 return err;
1595
1596         option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
1597         if (!option_item)
1598                 return -EMSGSIZE;
1599
1600         if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
1601                 goto nest_cancel;
1602         if (opt_inst_info->port &&
1603             nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
1604                         opt_inst_info->port->dev->ifindex))
1605                 goto nest_cancel;
1606         if (opt_inst->option->array_size &&
1607             nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
1608                         opt_inst_info->array_index))
1609                 goto nest_cancel;
1610
1611         switch (option->type) {
1612         case TEAM_OPTION_TYPE_U32:
1613                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
1614                         goto nest_cancel;
1615                 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
1616                         goto nest_cancel;
1617                 break;
1618         case TEAM_OPTION_TYPE_STRING:
1619                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
1620                         goto nest_cancel;
1621                 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
1622                                    ctx.data.str_val))
1623                         goto nest_cancel;
1624                 break;
1625         case TEAM_OPTION_TYPE_BINARY:
1626                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
1627                         goto nest_cancel;
1628                 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
1629                             ctx.data.bin_val.ptr))
1630                         goto nest_cancel;
1631                 break;
1632         case TEAM_OPTION_TYPE_BOOL:
1633                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
1634                         goto nest_cancel;
1635                 if (ctx.data.bool_val &&
1636                     nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
1637                         goto nest_cancel;
1638                 break;
1639         default:
1640                 BUG();
1641         }
1642         if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
1643                 goto nest_cancel;
1644         if (opt_inst->changed) {
1645                 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
1646                         goto nest_cancel;
1647                 opt_inst->changed = false;
1648         }
1649         nla_nest_end(skb, option_item);
1650         return 0;
1651
1652 nest_cancel:
1653         nla_nest_cancel(skb, option_item);
1654         return -EMSGSIZE;
1655 }
1656
1657 static int __send_and_alloc_skb(struct sk_buff **pskb,
1658                                 struct team *team, u32 pid,
1659                                 team_nl_send_func_t *send_func)
1660 {
1661         int err;
1662
1663         if (*pskb) {
1664                 err = send_func(*pskb, team, pid);
1665                 if (err)
1666                         return err;
1667         }
1668         *pskb = genlmsg_new(NLMSG_DEFAULT_SIZE - GENL_HDRLEN, GFP_KERNEL);
1669         if (!*pskb)
1670                 return -ENOMEM;
1671         return 0;
1672 }
1673
1674 static int team_nl_send_options_get(struct team *team, u32 pid, u32 seq,
1675                                     int flags, team_nl_send_func_t *send_func,
1676                                     struct list_head *sel_opt_inst_list)
1677 {
1678         struct nlattr *option_list;
1679         struct nlmsghdr *nlh;
1680         void *hdr;
1681         struct team_option_inst *opt_inst;
1682         int err;
1683         struct sk_buff *skb = NULL;
1684         bool incomplete;
1685         int i;
1686
1687         opt_inst = list_first_entry(sel_opt_inst_list,
1688                                     struct team_option_inst, tmp_list);
1689
1690 start_again:
1691         err = __send_and_alloc_skb(&skb, team, pid, send_func);
1692         if (err)
1693                 return err;
1694
1695         hdr = genlmsg_put(skb, pid, seq, &team_nl_family, flags | NLM_F_MULTI,
1696                           TEAM_CMD_OPTIONS_GET);
1697         if (IS_ERR(hdr))
1698                 return PTR_ERR(hdr);
1699
1700         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
1701                 goto nla_put_failure;
1702         option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
1703         if (!option_list)
1704                 goto nla_put_failure;
1705
1706         i = 0;
1707         incomplete = false;
1708         list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
1709                 err = team_nl_fill_one_option_get(skb, team, opt_inst);
1710                 if (err) {
1711                         if (err == -EMSGSIZE) {
1712                                 if (!i)
1713                                         goto errout;
1714                                 incomplete = true;
1715                                 break;
1716                         }
1717                         goto errout;
1718                 }
1719                 i++;
1720         }
1721
1722         nla_nest_end(skb, option_list);
1723         genlmsg_end(skb, hdr);
1724         if (incomplete)
1725                 goto start_again;
1726
1727 send_done:
1728         nlh = nlmsg_put(skb, pid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
1729         if (!nlh) {
1730                 err = __send_and_alloc_skb(&skb, team, pid, send_func);
1731                 if (err)
1732                         goto errout;
1733                 goto send_done;
1734         }
1735
1736         return send_func(skb, team, pid);
1737
1738 nla_put_failure:
1739         err = -EMSGSIZE;
1740 errout:
1741         genlmsg_cancel(skb, hdr);
1742         nlmsg_free(skb);
1743         return err;
1744 }
1745
1746 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
1747 {
1748         struct team *team;
1749         struct team_option_inst *opt_inst;
1750         int err;
1751         LIST_HEAD(sel_opt_inst_list);
1752
1753         team = team_nl_team_get(info);
1754         if (!team)
1755                 return -EINVAL;
1756
1757         list_for_each_entry(opt_inst, &team->option_inst_list, list)
1758                 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
1759         err = team_nl_send_options_get(team, info->snd_pid, info->snd_seq,
1760                                        NLM_F_ACK, team_nl_send_unicast,
1761                                        &sel_opt_inst_list);
1762
1763         team_nl_team_put(team);
1764
1765         return err;
1766 }
1767
1768 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
1769 {
1770         struct team *team;
1771         int err = 0;
1772         int i;
1773         struct nlattr *nl_option;
1774
1775         team = team_nl_team_get(info);
1776         if (!team)
1777                 return -EINVAL;
1778
1779         err = -EINVAL;
1780         if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
1781                 err = -EINVAL;
1782                 goto team_put;
1783         }
1784
1785         nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
1786                 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
1787                 struct nlattr *attr;
1788                 struct nlattr *attr_data;
1789                 enum team_option_type opt_type;
1790                 int opt_port_ifindex = 0; /* != 0 for per-port options */
1791                 u32 opt_array_index = 0;
1792                 bool opt_is_array = false;
1793                 struct team_option_inst *opt_inst;
1794                 char *opt_name;
1795                 bool opt_found = false;
1796
1797                 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
1798                         err = -EINVAL;
1799                         goto team_put;
1800                 }
1801                 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
1802                                        nl_option, team_nl_option_policy);
1803                 if (err)
1804                         goto team_put;
1805                 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
1806                     !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
1807                         err = -EINVAL;
1808                         goto team_put;
1809                 }
1810                 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
1811                 case NLA_U32:
1812                         opt_type = TEAM_OPTION_TYPE_U32;
1813                         break;
1814                 case NLA_STRING:
1815                         opt_type = TEAM_OPTION_TYPE_STRING;
1816                         break;
1817                 case NLA_BINARY:
1818                         opt_type = TEAM_OPTION_TYPE_BINARY;
1819                         break;
1820                 case NLA_FLAG:
1821                         opt_type = TEAM_OPTION_TYPE_BOOL;
1822                         break;
1823                 default:
1824                         goto team_put;
1825                 }
1826
1827                 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
1828                 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
1829                         err = -EINVAL;
1830                         goto team_put;
1831                 }
1832
1833                 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
1834                 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
1835                 if (attr)
1836                         opt_port_ifindex = nla_get_u32(attr);
1837
1838                 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
1839                 if (attr) {
1840                         opt_is_array = true;
1841                         opt_array_index = nla_get_u32(attr);
1842                 }
1843
1844                 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
1845                         struct team_option *option = opt_inst->option;
1846                         struct team_gsetter_ctx ctx;
1847                         struct team_option_inst_info *opt_inst_info;
1848                         int tmp_ifindex;
1849
1850                         opt_inst_info = &opt_inst->info;
1851                         tmp_ifindex = opt_inst_info->port ?
1852                                       opt_inst_info->port->dev->ifindex : 0;
1853                         if (option->type != opt_type ||
1854                             strcmp(option->name, opt_name) ||
1855                             tmp_ifindex != opt_port_ifindex ||
1856                             (option->array_size && !opt_is_array) ||
1857                             opt_inst_info->array_index != opt_array_index)
1858                                 continue;
1859                         opt_found = true;
1860                         ctx.info = opt_inst_info;
1861                         switch (opt_type) {
1862                         case TEAM_OPTION_TYPE_U32:
1863                                 ctx.data.u32_val = nla_get_u32(attr_data);
1864                                 break;
1865                         case TEAM_OPTION_TYPE_STRING:
1866                                 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
1867                                         err = -EINVAL;
1868                                         goto team_put;
1869                                 }
1870                                 ctx.data.str_val = nla_data(attr_data);
1871                                 break;
1872                         case TEAM_OPTION_TYPE_BINARY:
1873                                 ctx.data.bin_val.len = nla_len(attr_data);
1874                                 ctx.data.bin_val.ptr = nla_data(attr_data);
1875                                 break;
1876                         case TEAM_OPTION_TYPE_BOOL:
1877                                 ctx.data.bool_val = attr_data ? true : false;
1878                                 break;
1879                         default:
1880                                 BUG();
1881                         }
1882                         err = team_option_set(team, opt_inst, &ctx);
1883                         if (err)
1884                                 goto team_put;
1885                 }
1886                 if (!opt_found) {
1887                         err = -ENOENT;
1888                         goto team_put;
1889                 }
1890         }
1891
1892 team_put:
1893         team_nl_team_put(team);
1894
1895         return err;
1896 }
1897
1898 static int team_nl_fill_port_list_get(struct sk_buff *skb,
1899                                       u32 pid, u32 seq, int flags,
1900                                       struct team *team,
1901                                       bool fillall)
1902 {
1903         struct nlattr *port_list;
1904         void *hdr;
1905         struct team_port *port;
1906
1907         hdr = genlmsg_put(skb, pid, seq, &team_nl_family, flags,
1908                           TEAM_CMD_PORT_LIST_GET);
1909         if (IS_ERR(hdr))
1910                 return PTR_ERR(hdr);
1911
1912         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
1913                 goto nla_put_failure;
1914         port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
1915         if (!port_list)
1916                 goto nla_put_failure;
1917
1918         list_for_each_entry(port, &team->port_list, list) {
1919                 struct nlattr *port_item;
1920
1921                 /* Include only changed ports if fill all mode is not on */
1922                 if (!fillall && !port->changed)
1923                         continue;
1924                 port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
1925                 if (!port_item)
1926                         goto nla_put_failure;
1927                 if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
1928                         goto nla_put_failure;
1929                 if (port->changed) {
1930                         if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
1931                                 goto nla_put_failure;
1932                         port->changed = false;
1933                 }
1934                 if ((port->removed &&
1935                      nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
1936                     (port->state.linkup &&
1937                      nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
1938                     nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
1939                     nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
1940                         goto nla_put_failure;
1941                 nla_nest_end(skb, port_item);
1942         }
1943
1944         nla_nest_end(skb, port_list);
1945         return genlmsg_end(skb, hdr);
1946
1947 nla_put_failure:
1948         genlmsg_cancel(skb, hdr);
1949         return -EMSGSIZE;
1950 }
1951
1952 static int team_nl_fill_port_list_get_all(struct sk_buff *skb,
1953                                           struct genl_info *info, int flags,
1954                                           struct team *team)
1955 {
1956         return team_nl_fill_port_list_get(skb, info->snd_pid,
1957                                           info->snd_seq, NLM_F_ACK,
1958                                           team, true);
1959 }
1960
1961 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
1962                                      struct genl_info *info)
1963 {
1964         struct team *team;
1965         int err;
1966
1967         team = team_nl_team_get(info);
1968         if (!team)
1969                 return -EINVAL;
1970
1971         err = team_nl_send_generic(info, team, team_nl_fill_port_list_get_all);
1972
1973         team_nl_team_put(team);
1974
1975         return err;
1976 }
1977
1978 static struct genl_ops team_nl_ops[] = {
1979         {
1980                 .cmd = TEAM_CMD_NOOP,
1981                 .doit = team_nl_cmd_noop,
1982                 .policy = team_nl_policy,
1983         },
1984         {
1985                 .cmd = TEAM_CMD_OPTIONS_SET,
1986                 .doit = team_nl_cmd_options_set,
1987                 .policy = team_nl_policy,
1988                 .flags = GENL_ADMIN_PERM,
1989         },
1990         {
1991                 .cmd = TEAM_CMD_OPTIONS_GET,
1992                 .doit = team_nl_cmd_options_get,
1993                 .policy = team_nl_policy,
1994                 .flags = GENL_ADMIN_PERM,
1995         },
1996         {
1997                 .cmd = TEAM_CMD_PORT_LIST_GET,
1998                 .doit = team_nl_cmd_port_list_get,
1999                 .policy = team_nl_policy,
2000                 .flags = GENL_ADMIN_PERM,
2001         },
2002 };
2003
2004 static struct genl_multicast_group team_change_event_mcgrp = {
2005         .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME,
2006 };
2007
2008 static int team_nl_send_multicast(struct sk_buff *skb,
2009                                   struct team *team, u32 pid)
2010 {
2011         return genlmsg_multicast_netns(dev_net(team->dev), skb, 0,
2012                                        team_change_event_mcgrp.id, GFP_KERNEL);
2013 }
2014
2015 static int team_nl_send_event_options_get(struct team *team,
2016                                           struct list_head *sel_opt_inst_list)
2017 {
2018         return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2019                                         sel_opt_inst_list);
2020 }
2021
2022 static int team_nl_send_event_port_list_get(struct team *team)
2023 {
2024         struct sk_buff *skb;
2025         int err;
2026         struct net *net = dev_net(team->dev);
2027
2028         skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
2029         if (!skb)
2030                 return -ENOMEM;
2031
2032         err = team_nl_fill_port_list_get(skb, 0, 0, 0, team, false);
2033         if (err < 0)
2034                 goto err_fill;
2035
2036         err = genlmsg_multicast_netns(net, skb, 0, team_change_event_mcgrp.id,
2037                                       GFP_KERNEL);
2038         return err;
2039
2040 err_fill:
2041         nlmsg_free(skb);
2042         return err;
2043 }
2044
2045 static int team_nl_init(void)
2046 {
2047         int err;
2048
2049         err = genl_register_family_with_ops(&team_nl_family, team_nl_ops,
2050                                             ARRAY_SIZE(team_nl_ops));
2051         if (err)
2052                 return err;
2053
2054         err = genl_register_mc_group(&team_nl_family, &team_change_event_mcgrp);
2055         if (err)
2056                 goto err_change_event_grp_reg;
2057
2058         return 0;
2059
2060 err_change_event_grp_reg:
2061         genl_unregister_family(&team_nl_family);
2062
2063         return err;
2064 }
2065
2066 static void team_nl_fini(void)
2067 {
2068         genl_unregister_family(&team_nl_family);
2069 }
2070
2071
2072 /******************
2073  * Change checkers
2074  ******************/
2075
2076 static void __team_options_change_check(struct team *team)
2077 {
2078         int err;
2079         struct team_option_inst *opt_inst;
2080         LIST_HEAD(sel_opt_inst_list);
2081
2082         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2083                 if (opt_inst->changed)
2084                         list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2085         }
2086         err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2087         if (err)
2088                 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2089                             err);
2090 }
2091
2092 static void __team_option_inst_change(struct team *team,
2093                                       struct team_option_inst *sel_opt_inst)
2094 {
2095         int err;
2096         LIST_HEAD(sel_opt_inst_list);
2097
2098         sel_opt_inst->changed = true;
2099         list_add(&sel_opt_inst->tmp_list, &sel_opt_inst_list);
2100         err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2101         if (err)
2102                 netdev_warn(team->dev, "Failed to send option change via netlink (err %d)\n",
2103                             err);
2104 }
2105
2106 /* rtnl lock is held */
2107 static void __team_port_change_check(struct team_port *port, bool linkup)
2108 {
2109         int err;
2110
2111         if (!port->removed && port->state.linkup == linkup)
2112                 return;
2113
2114         port->changed = true;
2115         port->state.linkup = linkup;
2116         team_refresh_port_linkup(port);
2117         if (linkup) {
2118                 struct ethtool_cmd ecmd;
2119
2120                 err = __ethtool_get_settings(port->dev, &ecmd);
2121                 if (!err) {
2122                         port->state.speed = ethtool_cmd_speed(&ecmd);
2123                         port->state.duplex = ecmd.duplex;
2124                         goto send_event;
2125                 }
2126         }
2127         port->state.speed = 0;
2128         port->state.duplex = 0;
2129
2130 send_event:
2131         err = team_nl_send_event_port_list_get(port->team);
2132         if (err)
2133                 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink\n",
2134                             port->dev->name);
2135
2136 }
2137
2138 static void team_port_change_check(struct team_port *port, bool linkup)
2139 {
2140         struct team *team = port->team;
2141
2142         mutex_lock(&team->lock);
2143         __team_port_change_check(port, linkup);
2144         mutex_unlock(&team->lock);
2145 }
2146
2147
2148 /************************************
2149  * Net device notifier event handler
2150  ************************************/
2151
2152 static int team_device_event(struct notifier_block *unused,
2153                              unsigned long event, void *ptr)
2154 {
2155         struct net_device *dev = (struct net_device *) ptr;
2156         struct team_port *port;
2157
2158         port = team_port_get_rtnl(dev);
2159         if (!port)
2160                 return NOTIFY_DONE;
2161
2162         switch (event) {
2163         case NETDEV_UP:
2164                 if (netif_carrier_ok(dev))
2165                         team_port_change_check(port, true);
2166         case NETDEV_DOWN:
2167                 team_port_change_check(port, false);
2168         case NETDEV_CHANGE:
2169                 if (netif_running(port->dev))
2170                         team_port_change_check(port,
2171                                                !!netif_carrier_ok(port->dev));
2172                 break;
2173         case NETDEV_UNREGISTER:
2174                 team_del_slave(port->team->dev, dev);
2175                 break;
2176         case NETDEV_FEAT_CHANGE:
2177                 team_compute_features(port->team);
2178                 break;
2179         case NETDEV_CHANGEMTU:
2180                 /* Forbid to change mtu of underlaying device */
2181                 return NOTIFY_BAD;
2182         case NETDEV_PRE_TYPE_CHANGE:
2183                 /* Forbid to change type of underlaying device */
2184                 return NOTIFY_BAD;
2185         }
2186         return NOTIFY_DONE;
2187 }
2188
2189 static struct notifier_block team_notifier_block __read_mostly = {
2190         .notifier_call = team_device_event,
2191 };
2192
2193
2194 /***********************
2195  * Module init and exit
2196  ***********************/
2197
2198 static int __init team_module_init(void)
2199 {
2200         int err;
2201
2202         register_netdevice_notifier(&team_notifier_block);
2203
2204         err = rtnl_link_register(&team_link_ops);
2205         if (err)
2206                 goto err_rtnl_reg;
2207
2208         err = team_nl_init();
2209         if (err)
2210                 goto err_nl_init;
2211
2212         return 0;
2213
2214 err_nl_init:
2215         rtnl_link_unregister(&team_link_ops);
2216
2217 err_rtnl_reg:
2218         unregister_netdevice_notifier(&team_notifier_block);
2219
2220         return err;
2221 }
2222
2223 static void __exit team_module_exit(void)
2224 {
2225         team_nl_fini();
2226         rtnl_link_unregister(&team_link_ops);
2227         unregister_netdevice_notifier(&team_notifier_block);
2228 }
2229
2230 module_init(team_module_init);
2231 module_exit(team_module_exit);
2232
2233 MODULE_LICENSE("GPL v2");
2234 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
2235 MODULE_DESCRIPTION("Ethernet team device driver");
2236 MODULE_ALIAS_RTNL_LINK(DRV_NAME);