drivers/net/team/team.c

   1 /*
   2  * drivers/net/team/team.c - Network team device driver
   3  * Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/types.h>
  13 #include <linux/module.h>
  14 #include <linux/init.h>
  15 #include <linux/slab.h>
  16 #include <linux/rcupdate.h>
  17 #include <linux/errno.h>
  18 #include <linux/ctype.h>
  19 #include <linux/notifier.h>
  20 #include <linux/netdevice.h>
  21 #include <linux/netpoll.h>
  22 #include <linux/if_vlan.h>
  23 #include <linux/if_arp.h>
  24 #include <linux/socket.h>
  25 #include <linux/etherdevice.h>
  26 #include <linux/rtnetlink.h>
  27 #include <net/rtnetlink.h>
  28 #include <net/genetlink.h>
  29 #include <net/netlink.h>
  30 #include <net/sch_generic.h>
  31 #include <generated/utsrelease.h>
  32 #include <linux/if_team.h>
  33
  34 #define DRV_NAME "team"
  35
  36
  37 /**********
  38  * Helpers
  39  **********/
  40
  41 #define team_port_exists(dev) (dev->priv_flags & IFF_TEAM_PORT)
  42
  43 static struct team_port *team_port_get_rcu(const struct net_device *dev)
  44 {
  45         struct team_port *port = rcu_dereference(dev->rx_handler_data);
  46
  47         return team_port_exists(dev) ? port : NULL;
  48 }
  49
  50 static struct team_port *team_port_get_rtnl(const struct net_device *dev)
  51 {
  52         struct team_port *port = rtnl_dereference(dev->rx_handler_data);
  53
  54         return team_port_exists(dev) ? port : NULL;
  55 }
  56
  57 /*
  58  * Since the ability to change device address for open port device is tested in
  59  * team_port_add, this function can be called without control of return value
  60  */
  61 static int __set_port_dev_addr(struct net_device *port_dev,
  62                                const unsigned char *dev_addr)
  63 {
  64         struct sockaddr addr;
  65
  66         memcpy(addr.sa_data, dev_addr, port_dev->addr_len);
  67         addr.sa_family = port_dev->type;
  68         return dev_set_mac_address(port_dev, &addr);
  69 }
  70
  71 static int team_port_set_orig_dev_addr(struct team_port *port)
  72 {
  73         return __set_port_dev_addr(port->dev, port->orig.dev_addr);
  74 }
  75
  76 int team_port_set_team_dev_addr(struct team_port *port)
  77 {
  78         return __set_port_dev_addr(port->dev, port->team->dev->dev_addr);
  79 }
  80 EXPORT_SYMBOL(team_port_set_team_dev_addr);
  81
  82 static void team_refresh_port_linkup(struct team_port *port)
  83 {
  84         port->linkup = port->user.linkup_enabled ? port->user.linkup :
  85                                                    port->state.linkup;
  86 }
  87
  88
  89 /*******************
  90  * Options handling
  91  *******************/
  92
  93 struct team_option_inst { /* One for each option instance */
  94         struct list_head list;
  95         struct list_head tmp_list;
  96         struct team_option *option;
  97         struct team_option_inst_info info;
  98         bool changed;
  99         bool removed;
 100 };
 101
 102 static struct team_option *__team_find_option(struct team *team,
 103                                               const char *opt_name)
 104 {
 105         struct team_option *option;
 106
 107         list_for_each_entry(option, &team->option_list, list) {
 108                 if (strcmp(option->name, opt_name) == 0)
 109                         return option;
 110         }
 111         return NULL;
 112 }
 113
 114 static void __team_option_inst_del(struct team_option_inst *opt_inst)
 115 {
 116         list_del(&opt_inst->list);
 117         kfree(opt_inst);
 118 }
 119
 120 static void __team_option_inst_del_option(struct team *team,
 121                                           struct team_option *option)
 122 {
 123         struct team_option_inst *opt_inst, *tmp;
 124
 125         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 126                 if (opt_inst->option == option)
 127                         __team_option_inst_del(opt_inst);
 128         }
 129 }
 130
 131 static int __team_option_inst_add(struct team *team, struct team_option *option,
 132                                   struct team_port *port)
 133 {
 134         struct team_option_inst *opt_inst;
 135         unsigned int array_size;
 136         unsigned int i;
 137         int err;
 138
 139         array_size = option->array_size;
 140         if (!array_size)
 141                 array_size = 1; /* No array but still need one instance */
 142
 143         for (i = 0; i < array_size; i++) {
 144                 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL);
 145                 if (!opt_inst)
 146                         return -ENOMEM;
 147                 opt_inst->option = option;
 148                 opt_inst->info.port = port;
 149                 opt_inst->info.array_index = i;
 150                 opt_inst->changed = true;
 151                 opt_inst->removed = false;
 152                 list_add_tail(&opt_inst->list, &team->option_inst_list);
 153                 if (option->init) {
 154                         err = option->init(team, &opt_inst->info);
 155                         if (err)
 156                                 return err;
 157                 }
 158
 159         }
 160         return 0;
 161 }
 162
 163 static int __team_option_inst_add_option(struct team *team,
 164                                          struct team_option *option)
 165 {
 166         struct team_port *port;
 167         int err;
 168
 169         if (!option->per_port) {
 170                 err = __team_option_inst_add(team, option, NULL);
 171                 if (err)
 172                         goto inst_del_option;
 173         }
 174
 175         list_for_each_entry(port, &team->port_list, list) {
 176                 err = __team_option_inst_add(team, option, port);
 177                 if (err)
 178                         goto inst_del_option;
 179         }
 180         return 0;
 181
 182 inst_del_option:
 183         __team_option_inst_del_option(team, option);
 184         return err;
 185 }
 186
 187 static void __team_option_inst_mark_removed_option(struct team *team,
 188                                                    struct team_option *option)
 189 {
 190         struct team_option_inst *opt_inst;
 191
 192         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 193                 if (opt_inst->option == option) {
 194                         opt_inst->changed = true;
 195                         opt_inst->removed = true;
 196                 }
 197         }
 198 }
 199
 200 static void __team_option_inst_del_port(struct team *team,
 201                                         struct team_port *port)
 202 {
 203         struct team_option_inst *opt_inst, *tmp;
 204
 205         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 206                 if (opt_inst->option->per_port &&
 207                     opt_inst->info.port == port)
 208                         __team_option_inst_del(opt_inst);
 209         }
 210 }
 211
 212 static int __team_option_inst_add_port(struct team *team,
 213                                        struct team_port *port)
 214 {
 215         struct team_option *option;
 216         int err;
 217
 218         list_for_each_entry(option, &team->option_list, list) {
 219                 if (!option->per_port)
 220                         continue;
 221                 err = __team_option_inst_add(team, option, port);
 222                 if (err)
 223                         goto inst_del_port;
 224         }
 225         return 0;
 226
 227 inst_del_port:
 228         __team_option_inst_del_port(team, port);
 229         return err;
 230 }
 231
 232 static void __team_option_inst_mark_removed_port(struct team *team,
 233                                                  struct team_port *port)
 234 {
 235         struct team_option_inst *opt_inst;
 236
 237         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 238                 if (opt_inst->info.port == port) {
 239                         opt_inst->changed = true;
 240                         opt_inst->removed = true;
 241                 }
 242         }
 243 }
 244
 245 static int __team_options_register(struct team *team,
 246                                    const struct team_option *option,
 247                                    size_t option_count)
 248 {
 249         int i;
 250         struct team_option **dst_opts;
 251         int err;
 252
 253         dst_opts = kzalloc(sizeof(struct team_option *) * option_count,
 254                            GFP_KERNEL);
 255         if (!dst_opts)
 256                 return -ENOMEM;
 257         for (i = 0; i < option_count; i++, option++) {
 258                 if (__team_find_option(team, option->name)) {
 259                         err = -EEXIST;
 260                         goto alloc_rollback;
 261                 }
 262                 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
 263                 if (!dst_opts[i]) {
 264                         err = -ENOMEM;
 265                         goto alloc_rollback;
 266                 }
 267         }
 268
 269         for (i = 0; i < option_count; i++) {
 270                 err = __team_option_inst_add_option(team, dst_opts[i]);
 271                 if (err)
 272                         goto inst_rollback;
 273                 list_add_tail(&dst_opts[i]->list, &team->option_list);
 274         }
 275
 276         kfree(dst_opts);
 277         return 0;
 278
 279 inst_rollback:
 280         for (i--; i >= 0; i--)
 281                 __team_option_inst_del_option(team, dst_opts[i]);
 282
 283         i = option_count - 1;
 284 alloc_rollback:
 285         for (i--; i >= 0; i--)
 286                 kfree(dst_opts[i]);
 287
 288         kfree(dst_opts);
 289         return err;
 290 }
 291
 292 static void __team_options_mark_removed(struct team *team,
 293                                         const struct team_option *option,
 294                                         size_t option_count)
 295 {
 296         int i;
 297
 298         for (i = 0; i < option_count; i++, option++) {
 299                 struct team_option *del_opt;
 300
 301                 del_opt = __team_find_option(team, option->name);
 302                 if (del_opt)
 303                         __team_option_inst_mark_removed_option(team, del_opt);
 304         }
 305 }
 306
 307 static void __team_options_unregister(struct team *team,
 308                                       const struct team_option *option,
 309                                       size_t option_count)
 310 {
 311         int i;
 312
 313         for (i = 0; i < option_count; i++, option++) {
 314                 struct team_option *del_opt;
 315
 316                 del_opt = __team_find_option(team, option->name);
 317                 if (del_opt) {
 318                         __team_option_inst_del_option(team, del_opt);
 319                         list_del(&del_opt->list);
 320                         kfree(del_opt);
 321                 }
 322         }
 323 }
 324
 325 static void __team_options_change_check(struct team *team);
 326
 327 int team_options_register(struct team *team,
 328                           const struct team_option *option,
 329                           size_t option_count)
 330 {
 331         int err;
 332
 333         err = __team_options_register(team, option, option_count);
 334         if (err)
 335                 return err;
 336         __team_options_change_check(team);
 337         return 0;
 338 }
 339 EXPORT_SYMBOL(team_options_register);
 340
 341 void team_options_unregister(struct team *team,
 342                              const struct team_option *option,
 343                              size_t option_count)
 344 {
 345         __team_options_mark_removed(team, option, option_count);
 346         __team_options_change_check(team);
 347         __team_options_unregister(team, option, option_count);
 348 }
 349 EXPORT_SYMBOL(team_options_unregister);
 350
 351 static int team_option_get(struct team *team,
 352                            struct team_option_inst *opt_inst,
 353                            struct team_gsetter_ctx *ctx)
 354 {
 355         if (!opt_inst->option->getter)
 356                 return -EOPNOTSUPP;
 357         return opt_inst->option->getter(team, ctx);
 358 }
 359
 360 static int team_option_set(struct team *team,
 361                            struct team_option_inst *opt_inst,
 362                            struct team_gsetter_ctx *ctx)
 363 {
 364         if (!opt_inst->option->setter)
 365                 return -EOPNOTSUPP;
 366         return opt_inst->option->setter(team, ctx);
 367 }
 368
 369 void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info)
 370 {
 371         struct team_option_inst *opt_inst;
 372
 373         opt_inst = container_of(opt_inst_info, struct team_option_inst, info);
 374         opt_inst->changed = true;
 375 }
 376 EXPORT_SYMBOL(team_option_inst_set_change);
 377
 378 void team_options_change_check(struct team *team)
 379 {
 380         __team_options_change_check(team);
 381 }
 382 EXPORT_SYMBOL(team_options_change_check);
 383
 384
 385 /****************
 386  * Mode handling
 387  ****************/
 388
 389 static LIST_HEAD(mode_list);
 390 static DEFINE_SPINLOCK(mode_list_lock);
 391
 392 struct team_mode_item {
 393         struct list_head list;
 394         const struct team_mode *mode;
 395 };
 396
 397 static struct team_mode_item *__find_mode(const char *kind)
 398 {
 399         struct team_mode_item *mitem;
 400
 401         list_for_each_entry(mitem, &mode_list, list) {
 402                 if (strcmp(mitem->mode->kind, kind) == 0)
 403                         return mitem;
 404         }
 405         return NULL;
 406 }
 407
 408 static bool is_good_mode_name(const char *name)
 409 {
 410         while (*name != '\0') {
 411                 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
 412                         return false;
 413                 name++;
 414         }
 415         return true;
 416 }
 417
 418 int team_mode_register(const struct team_mode *mode)
 419 {
 420         int err = 0;
 421         struct team_mode_item *mitem;
 422
 423         if (!is_good_mode_name(mode->kind) ||
 424             mode->priv_size > TEAM_MODE_PRIV_SIZE)
 425                 return -EINVAL;
 426
 427         mitem = kmalloc(sizeof(*mitem), GFP_KERNEL);
 428         if (!mitem)
 429                 return -ENOMEM;
 430
 431         spin_lock(&mode_list_lock);
 432         if (__find_mode(mode->kind)) {
 433                 err = -EEXIST;
 434                 kfree(mitem);
 435                 goto unlock;
 436         }
 437         mitem->mode = mode;
 438         list_add_tail(&mitem->list, &mode_list);
 439 unlock:
 440         spin_unlock(&mode_list_lock);
 441         return err;
 442 }
 443 EXPORT_SYMBOL(team_mode_register);
 444
 445 void team_mode_unregister(const struct team_mode *mode)
 446 {
 447         struct team_mode_item *mitem;
 448
 449         spin_lock(&mode_list_lock);
 450         mitem = __find_mode(mode->kind);
 451         if (mitem) {
 452                 list_del_init(&mitem->list);
 453                 kfree(mitem);
 454         }
 455         spin_unlock(&mode_list_lock);
 456 }
 457 EXPORT_SYMBOL(team_mode_unregister);
 458
 459 static const struct team_mode *team_mode_get(const char *kind)
 460 {
 461         struct team_mode_item *mitem;
 462         const struct team_mode *mode = NULL;
 463
 464         spin_lock(&mode_list_lock);
 465         mitem = __find_mode(kind);
 466         if (!mitem) {
 467                 spin_unlock(&mode_list_lock);
 468                 request_module("team-mode-%s", kind);
 469                 spin_lock(&mode_list_lock);
 470                 mitem = __find_mode(kind);
 471         }
 472         if (mitem) {
 473                 mode = mitem->mode;
 474                 if (!try_module_get(mode->owner))
 475                         mode = NULL;
 476         }
 477
 478         spin_unlock(&mode_list_lock);
 479         return mode;
 480 }
 481
 482 static void team_mode_put(const struct team_mode *mode)
 483 {
 484         module_put(mode->owner);
 485 }
 486
 487 static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
 488 {
 489         dev_kfree_skb_any(skb);
 490         return false;
 491 }
 492
 493 rx_handler_result_t team_dummy_receive(struct team *team,
 494                                        struct team_port *port,
 495                                        struct sk_buff *skb)
 496 {
 497         return RX_HANDLER_ANOTHER;
 498 }
 499
 500 static const struct team_mode __team_no_mode = {
 501         .kind           = "*NOMODE*",
 502 };
 503
 504 static bool team_is_mode_set(struct team *team)
 505 {
 506         return team->mode != &__team_no_mode;
 507 }
 508
 509 static void team_set_no_mode(struct team *team)
 510 {
 511         team->mode = &__team_no_mode;
 512 }
 513
 514 static void __team_adjust_ops(struct team *team, int en_port_count)
 515 {
 516         /*
 517          * To avoid checks in rx/tx skb paths, ensure here that non-null and
 518          * correct ops are always set.
 519          */
 520
 521         if (!en_port_count || !team_is_mode_set(team) ||
 522             !team->mode->ops->transmit)
 523                 team->ops.transmit = team_dummy_transmit;
 524         else
 525                 team->ops.transmit = team->mode->ops->transmit;
 526
 527         if (!en_port_count || !team_is_mode_set(team) ||
 528             !team->mode->ops->receive)
 529                 team->ops.receive = team_dummy_receive;
 530         else
 531                 team->ops.receive = team->mode->ops->receive;
 532 }
 533
 534 static void team_adjust_ops(struct team *team)
 535 {
 536         __team_adjust_ops(team, team->en_port_count);
 537 }
 538
 539 /*
 540  * We can benefit from the fact that it's ensured no port is present
 541  * at the time of mode change. Therefore no packets are in fly so there's no
 542  * need to set mode operations in any special way.
 543  */
 544 static int __team_change_mode(struct team *team,
 545                               const struct team_mode *new_mode)
 546 {
 547         /* Check if mode was previously set and do cleanup if so */
 548         if (team_is_mode_set(team)) {
 549                 void (*exit_op)(struct team *team) = team->ops.exit;
 550
 551                 /* Clear ops area so no callback is called any longer */
 552                 memset(&team->ops, 0, sizeof(struct team_mode_ops));
 553                 team_adjust_ops(team);
 554
 555                 if (exit_op)
 556                         exit_op(team);
 557                 team_mode_put(team->mode);
 558                 team_set_no_mode(team);
 559                 /* zero private data area */
 560                 memset(&team->mode_priv, 0,
 561                        sizeof(struct team) - offsetof(struct team, mode_priv));
 562         }
 563
 564         if (!new_mode)
 565                 return 0;
 566
 567         if (new_mode->ops->init) {
 568                 int err;
 569
 570                 err = new_mode->ops->init(team);
 571                 if (err)
 572                         return err;
 573         }
 574
 575         team->mode = new_mode;
 576         memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
 577         team_adjust_ops(team);
 578
 579         return 0;
 580 }
 581
 582 static int team_change_mode(struct team *team, const char *kind)
 583 {
 584         const struct team_mode *new_mode;
 585         struct net_device *dev = team->dev;
 586         int err;
 587
 588         if (!list_empty(&team->port_list)) {
 589                 netdev_err(dev, "No ports can be present during mode change\n");
 590                 return -EBUSY;
 591         }
 592
 593         if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) {
 594                 netdev_err(dev, "Unable to change to the same mode the team is in\n");
 595                 return -EINVAL;
 596         }
 597
 598         new_mode = team_mode_get(kind);
 599         if (!new_mode) {
 600                 netdev_err(dev, "Mode \"%s\" not found\n", kind);
 601                 return -EINVAL;
 602         }
 603
 604         err = __team_change_mode(team, new_mode);
 605         if (err) {
 606                 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
 607                 team_mode_put(new_mode);
 608                 return err;
 609         }
 610
 611         netdev_info(dev, "Mode changed to \"%s\"\n", kind);
 612         return 0;
 613 }
 614
 615
 616 /************************
 617  * Rx path frame handler
 618  ************************/
 619
 620 /* note: already called with rcu_read_lock */
 621 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
 622 {
 623         struct sk_buff *skb = *pskb;
 624         struct team_port *port;
 625         struct team *team;
 626         rx_handler_result_t res;
 627
 628         skb = skb_share_check(skb, GFP_ATOMIC);
 629         if (!skb)
 630                 return RX_HANDLER_CONSUMED;
 631
 632         *pskb = skb;
 633
 634         port = team_port_get_rcu(skb->dev);
 635         team = port->team;
 636         if (!team_port_enabled(port)) {
 637                 /* allow exact match delivery for disabled ports */
 638                 res = RX_HANDLER_EXACT;
 639         } else {
 640                 res = team->ops.receive(team, port, skb);
 641         }
 642         if (res == RX_HANDLER_ANOTHER) {
 643                 struct team_pcpu_stats *pcpu_stats;
 644
 645                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
 646                 u64_stats_update_begin(&pcpu_stats->syncp);
 647                 pcpu_stats->rx_packets++;
 648                 pcpu_stats->rx_bytes += skb->len;
 649                 if (skb->pkt_type == PACKET_MULTICAST)
 650                         pcpu_stats->rx_multicast++;
 651                 u64_stats_update_end(&pcpu_stats->syncp);
 652
 653                 skb->dev = team->dev;
 654         } else {
 655                 this_cpu_inc(team->pcpu_stats->rx_dropped);
 656         }
 657
 658         return res;
 659 }
 660
 661
 662 /*************************************
 663  * Multiqueue Tx port select override
 664  *************************************/
 665
 666 static int team_queue_override_init(struct team *team)
 667 {
 668         struct list_head *listarr;
 669         unsigned int queue_cnt = team->dev->num_tx_queues - 1;
 670         unsigned int i;
 671
 672         if (!queue_cnt)
 673                 return 0;
 674         listarr = kmalloc(sizeof(struct list_head) * queue_cnt, GFP_KERNEL);
 675         if (!listarr)
 676                 return -ENOMEM;
 677         team->qom_lists = listarr;
 678         for (i = 0; i < queue_cnt; i++)
 679                 INIT_LIST_HEAD(listarr++);
 680         return 0;
 681 }
 682
 683 static void team_queue_override_fini(struct team *team)
 684 {
 685         kfree(team->qom_lists);
 686 }
 687
 688 static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
 689 {
 690         return &team->qom_lists[queue_id - 1];
 691 }
 692
 693 /*
 694  * note: already called with rcu_read_lock
 695  */
 696 static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
 697 {
 698         struct list_head *qom_list;
 699         struct team_port *port;
 700
 701         if (!team->queue_override_enabled || !skb->queue_mapping)
 702                 return false;
 703         qom_list = __team_get_qom_list(team, skb->queue_mapping);
 704         list_for_each_entry_rcu(port, qom_list, qom_list) {
 705                 if (!team_dev_queue_xmit(team, port, skb))
 706                         return true;
 707         }
 708         return false;
 709 }
 710
 711 static void __team_queue_override_port_del(struct team *team,
 712                                            struct team_port *port)
 713 {
 714         list_del_rcu(&port->qom_list);
 715         synchronize_rcu();
 716         INIT_LIST_HEAD(&port->qom_list);
 717 }
 718
 719 static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
 720                                                       struct team_port *cur)
 721 {
 722         if (port->priority < cur->priority)
 723                 return true;
 724         if (port->priority > cur->priority)
 725                 return false;
 726         if (port->index < cur->index)
 727                 return true;
 728         return false;
 729 }
 730
 731 static void __team_queue_override_port_add(struct team *team,
 732                                            struct team_port *port)
 733 {
 734         struct team_port *cur;
 735         struct list_head *qom_list;
 736         struct list_head *node;
 737
 738         if (!port->queue_id || !team_port_enabled(port))
 739                 return;
 740
 741         qom_list = __team_get_qom_list(team, port->queue_id);
 742         node = qom_list;
 743         list_for_each_entry(cur, qom_list, qom_list) {
 744                 if (team_queue_override_port_has_gt_prio_than(port, cur))
 745                         break;
 746                 node = &cur->qom_list;
 747         }
 748         list_add_tail_rcu(&port->qom_list, node);
 749 }
 750
 751 static void __team_queue_override_enabled_check(struct team *team)
 752 {
 753         struct team_port *port;
 754         bool enabled = false;
 755
 756         list_for_each_entry(port, &team->port_list, list) {
 757                 if (!list_empty(&port->qom_list)) {
 758                         enabled = true;
 759                         break;
 760                 }
 761         }
 762         if (enabled == team->queue_override_enabled)
 763                 return;
 764         netdev_dbg(team->dev, "%s queue override\n",
 765                    enabled ? "Enabling" : "Disabling");
 766         team->queue_override_enabled = enabled;
 767 }
 768
 769 static void team_queue_override_port_refresh(struct team *team,
 770                                              struct team_port *port)
 771 {
 772         __team_queue_override_port_del(team, port);
 773         __team_queue_override_port_add(team, port);
 774         __team_queue_override_enabled_check(team);
 775 }
 776
 777
 778 /****************
 779  * Port handling
 780  ****************/
 781
 782 static bool team_port_find(const struct team *team,
 783                            const struct team_port *port)
 784 {
 785         struct team_port *cur;
 786
 787         list_for_each_entry(cur, &team->port_list, list)
 788                 if (cur == port)
 789                         return true;
 790         return false;
 791 }
 792
 793 /*
 794  * Enable/disable port by adding to enabled port hashlist and setting
 795  * port->index (Might be racy so reader could see incorrect ifindex when
 796  * processing a flying packet, but that is not a problem). Write guarded
 797  * by team->lock.
 798  */
 799 static void team_port_enable(struct team *team,
 800                              struct team_port *port)
 801 {
 802         if (team_port_enabled(port))
 803                 return;
 804         port->index = team->en_port_count++;
 805         hlist_add_head_rcu(&port->hlist,
 806                            team_port_index_hash(team, port->index));
 807         team_adjust_ops(team);
 808         team_queue_override_port_refresh(team, port);
 809         if (team->ops.port_enabled)
 810                 team->ops.port_enabled(team, port);
 811 }
 812
 813 static void __reconstruct_port_hlist(struct team *team, int rm_index)
 814 {
 815         int i;
 816         struct team_port *port;
 817
 818         for (i = rm_index + 1; i < team->en_port_count; i++) {
 819                 port = team_get_port_by_index(team, i);
 820                 hlist_del_rcu(&port->hlist);
 821                 port->index--;
 822                 hlist_add_head_rcu(&port->hlist,
 823                                    team_port_index_hash(team, port->index));
 824         }
 825 }
 826
 827 static void team_port_disable(struct team *team,
 828                               struct team_port *port)
 829 {
 830         if (!team_port_enabled(port))
 831                 return;
 832         if (team->ops.port_disabled)
 833                 team->ops.port_disabled(team, port);
 834         hlist_del_rcu(&port->hlist);
 835         __reconstruct_port_hlist(team, port->index);
 836         port->index = -1;
 837         team_queue_override_port_refresh(team, port);
 838         __team_adjust_ops(team, team->en_port_count - 1);
 839         /*
 840          * Wait until readers see adjusted ops. This ensures that
 841          * readers never see team->en_port_count == 0
 842          */
 843         synchronize_rcu();
 844         team->en_port_count--;
 845 }
 846
 847 #define TEAM_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \
 848                             NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
 849                             NETIF_F_HIGHDMA | NETIF_F_LRO)
 850
 851 static void __team_compute_features(struct team *team)
 852 {
 853         struct team_port *port;
 854         u32 vlan_features = TEAM_VLAN_FEATURES;
 855         unsigned short max_hard_header_len = ETH_HLEN;
 856         unsigned int flags, dst_release_flag = IFF_XMIT_DST_RELEASE;
 857
 858         list_for_each_entry(port, &team->port_list, list) {
 859                 vlan_features = netdev_increment_features(vlan_features,
 860                                         port->dev->vlan_features,
 861                                         TEAM_VLAN_FEATURES);
 862
 863                 dst_release_flag &= port->dev->priv_flags;
 864                 if (port->dev->hard_header_len > max_hard_header_len)
 865                         max_hard_header_len = port->dev->hard_header_len;
 866         }
 867
 868         team->dev->vlan_features = vlan_features;
 869         team->dev->hard_header_len = max_hard_header_len;
 870
 871         flags = team->dev->priv_flags & ~IFF_XMIT_DST_RELEASE;
 872         team->dev->priv_flags = flags | dst_release_flag;
 873
 874         netdev_change_features(team->dev);
 875 }
 876
 877 static void team_compute_features(struct team *team)
 878 {
 879         mutex_lock(&team->lock);
 880         __team_compute_features(team);
 881         mutex_unlock(&team->lock);
 882 }
 883
 884 static int team_port_enter(struct team *team, struct team_port *port)
 885 {
 886         int err = 0;
 887
 888         dev_hold(team->dev);
 889         port->dev->priv_flags |= IFF_TEAM_PORT;
 890         if (team->ops.port_enter) {
 891                 err = team->ops.port_enter(team, port);
 892                 if (err) {
 893                         netdev_err(team->dev, "Device %s failed to enter team mode\n",
 894                                    port->dev->name);
 895                         goto err_port_enter;
 896                 }
 897         }
 898
 899         return 0;
 900
 901 err_port_enter:
 902         port->dev->priv_flags &= ~IFF_TEAM_PORT;
 903         dev_put(team->dev);
 904
 905         return err;
 906 }
 907
 908 static void team_port_leave(struct team *team, struct team_port *port)
 909 {
 910         if (team->ops.port_leave)
 911                 team->ops.port_leave(team, port);
 912         port->dev->priv_flags &= ~IFF_TEAM_PORT;
 913         dev_put(team->dev);
 914 }
 915
 916 #ifdef CONFIG_NET_POLL_CONTROLLER
 917 static int team_port_enable_netpoll(struct team *team, struct team_port *port,
 918                                     gfp_t gfp)
 919 {
 920         struct netpoll *np;
 921         int err;
 922
 923         np = kzalloc(sizeof(*np), gfp);
 924         if (!np)
 925                 return -ENOMEM;
 926
 927         err = __netpoll_setup(np, port->dev, gfp);
 928         if (err) {
 929                 kfree(np);
 930                 return err;
 931         }
 932         port->np = np;
 933         return err;
 934 }
 935
 936 static void team_port_disable_netpoll(struct team_port *port)
 937 {
 938         struct netpoll *np = port->np;
 939
 940         if (!np)
 941                 return;
 942         port->np = NULL;
 943
 944         /* Wait for transmitting packets to finish before freeing. */
 945         synchronize_rcu_bh();
 946         __netpoll_cleanup(np);
 947         kfree(np);
 948 }
 949
 950 static struct netpoll_info *team_netpoll_info(struct team *team)
 951 {
 952         return team->dev->npinfo;
 953 }
 954
 955 #else
 956 static int team_port_enable_netpoll(struct team *team, struct team_port *port,
 957                                     gfp_t gfp)
 958 {
 959         return 0;
 960 }
 961 static void team_port_disable_netpoll(struct team_port *port)
 962 {
 963 }
 964 static struct netpoll_info *team_netpoll_info(struct team *team)
 965 {
 966         return NULL;
 967 }
 968 #endif
 969
 970 static void __team_port_change_port_added(struct team_port *port, bool linkup);
 971 static int team_dev_type_check_change(struct net_device *dev,
 972                                       struct net_device *port_dev);
 973
 974 static int team_port_add(struct team *team, struct net_device *port_dev)
 975 {
 976         struct net_device *dev = team->dev;
 977         struct team_port *port;
 978         char *portname = port_dev->name;
 979         int err;
 980
 981         if (port_dev->flags & IFF_LOOPBACK) {
 982                 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
 983                            portname);
 984                 return -EINVAL;
 985         }
 986
 987         if (team_port_exists(port_dev)) {
 988                 netdev_err(dev, "Device %s is already a port "
 989                                 "of a team device\n", portname);
 990                 return -EBUSY;
 991         }
 992
 993         if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
 994             vlan_uses_dev(dev)) {
 995                 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
 996                            portname);
 997                 return -EPERM;
 998         }
 999
1000         err = team_dev_type_check_change(dev, port_dev);
1001         if (err)
1002                 return err;
1003
1004         if (port_dev->flags & IFF_UP) {
1005                 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1006                            portname);
1007                 return -EBUSY;
1008         }
1009
1010         port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1011                        GFP_KERNEL);
1012         if (!port)
1013                 return -ENOMEM;
1014
1015         port->dev = port_dev;
1016         port->team = team;
1017         INIT_LIST_HEAD(&port->qom_list);
1018
1019         port->orig.mtu = port_dev->mtu;
1020         err = dev_set_mtu(port_dev, dev->mtu);
1021         if (err) {
1022                 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1023                 goto err_set_mtu;
1024         }
1025
1026         memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1027
1028         err = team_port_enter(team, port);
1029         if (err) {
1030                 netdev_err(dev, "Device %s failed to enter team mode\n",
1031                            portname);
1032                 goto err_port_enter;
1033         }
1034
1035         err = dev_open(port_dev);
1036         if (err) {
1037                 netdev_dbg(dev, "Device %s opening failed\n",
1038                            portname);
1039                 goto err_dev_open;
1040         }
1041
1042         err = vlan_vids_add_by_dev(port_dev, dev);
1043         if (err) {
1044                 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1045                                 portname);
1046                 goto err_vids_add;
1047         }
1048
1049         if (team_netpoll_info(team)) {
1050                 err = team_port_enable_netpoll(team, port, GFP_KERNEL);
1051                 if (err) {
1052                         netdev_err(dev, "Failed to enable netpoll on device %s\n",
1053                                    portname);
1054                         goto err_enable_netpoll;
1055                 }
1056         }
1057
1058         err = netdev_master_upper_dev_link(port_dev, dev);
1059         if (err) {
1060                 netdev_err(dev, "Device %s failed to set upper link\n",
1061                            portname);
1062                 goto err_set_upper_link;
1063         }
1064
1065         err = netdev_rx_handler_register(port_dev, team_handle_frame,
1066                                          port);
1067         if (err) {
1068                 netdev_err(dev, "Device %s failed to register rx_handler\n",
1069                            portname);
1070                 goto err_handler_register;
1071         }
1072
1073         err = __team_option_inst_add_port(team, port);
1074         if (err) {
1075                 netdev_err(dev, "Device %s failed to add per-port options\n",
1076                            portname);
1077                 goto err_option_port_add;
1078         }
1079
1080         port->index = -1;
1081         team_port_enable(team, port);
1082         list_add_tail_rcu(&port->list, &team->port_list);
1083         __team_compute_features(team);
1084         __team_port_change_port_added(port, !!netif_carrier_ok(port_dev));
1085         __team_options_change_check(team);
1086
1087         netdev_info(dev, "Port device %s added\n", portname);
1088
1089         return 0;
1090
1091 err_option_port_add:
1092         netdev_rx_handler_unregister(port_dev);
1093
1094 err_handler_register:
1095         netdev_upper_dev_unlink(port_dev, dev);
1096
1097 err_set_upper_link:
1098         team_port_disable_netpoll(port);
1099
1100 err_enable_netpoll:
1101         vlan_vids_del_by_dev(port_dev, dev);
1102
1103 err_vids_add:
1104         dev_close(port_dev);
1105
1106 err_dev_open:
1107         team_port_leave(team, port);
1108         team_port_set_orig_dev_addr(port);
1109
1110 err_port_enter:
1111         dev_set_mtu(port_dev, port->orig.mtu);
1112
1113 err_set_mtu:
1114         kfree(port);
1115
1116         return err;
1117 }
1118
1119 static void __team_port_change_port_removed(struct team_port *port);
1120
1121 static int team_port_del(struct team *team, struct net_device *port_dev)
1122 {
1123         struct net_device *dev = team->dev;
1124         struct team_port *port;
1125         char *portname = port_dev->name;
1126
1127         port = team_port_get_rtnl(port_dev);
1128         if (!port || !team_port_find(team, port)) {
1129                 netdev_err(dev, "Device %s does not act as a port of this team\n",
1130                            portname);
1131                 return -ENOENT;
1132         }
1133
1134         __team_option_inst_mark_removed_port(team, port);
1135         __team_options_change_check(team);
1136         __team_option_inst_del_port(team, port);
1137         __team_port_change_port_removed(port);
1138         team_port_disable(team, port);
1139         list_del_rcu(&port->list);
1140         netdev_rx_handler_unregister(port_dev);
1141         netdev_upper_dev_unlink(port_dev, dev);
1142         team_port_disable_netpoll(port);
1143         vlan_vids_del_by_dev(port_dev, dev);
1144         dev_close(port_dev);
1145         team_port_leave(team, port);
1146         team_port_set_orig_dev_addr(port);
1147         dev_set_mtu(port_dev, port->orig.mtu);
1148         synchronize_rcu();
1149         kfree(port);
1150         netdev_info(dev, "Port device %s removed\n", portname);
1151         __team_compute_features(team);
1152
1153         return 0;
1154 }
1155
1156
1157 /*****************
1158  * Net device ops
1159  *****************/
1160
1161 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1162 {
1163         ctx->data.str_val = team->mode->kind;
1164         return 0;
1165 }
1166
1167 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1168 {
1169         return team_change_mode(team, ctx->data.str_val);
1170 }
1171
1172 static int team_port_en_option_get(struct team *team,
1173                                    struct team_gsetter_ctx *ctx)
1174 {
1175         struct team_port *port = ctx->info->port;
1176
1177         ctx->data.bool_val = team_port_enabled(port);
1178         return 0;
1179 }
1180
1181 static int team_port_en_option_set(struct team *team,
1182                                    struct team_gsetter_ctx *ctx)
1183 {
1184         struct team_port *port = ctx->info->port;
1185
1186         if (ctx->data.bool_val)
1187                 team_port_enable(team, port);
1188         else
1189                 team_port_disable(team, port);
1190         return 0;
1191 }
1192
1193 static int team_user_linkup_option_get(struct team *team,
1194                                        struct team_gsetter_ctx *ctx)
1195 {
1196         struct team_port *port = ctx->info->port;
1197
1198         ctx->data.bool_val = port->user.linkup;
1199         return 0;
1200 }
1201
1202 static int team_user_linkup_option_set(struct team *team,
1203                                        struct team_gsetter_ctx *ctx)
1204 {
1205         struct team_port *port = ctx->info->port;
1206
1207         port->user.linkup = ctx->data.bool_val;
1208         team_refresh_port_linkup(port);
1209         return 0;
1210 }
1211
1212 static int team_user_linkup_en_option_get(struct team *team,
1213                                           struct team_gsetter_ctx *ctx)
1214 {
1215         struct team_port *port = ctx->info->port;
1216
1217         ctx->data.bool_val = port->user.linkup_enabled;
1218         return 0;
1219 }
1220
1221 static int team_user_linkup_en_option_set(struct team *team,
1222                                           struct team_gsetter_ctx *ctx)
1223 {
1224         struct team_port *port = ctx->info->port;
1225
1226         port->user.linkup_enabled = ctx->data.bool_val;
1227         team_refresh_port_linkup(port);
1228         return 0;
1229 }
1230
1231 static int team_priority_option_get(struct team *team,
1232                                     struct team_gsetter_ctx *ctx)
1233 {
1234         struct team_port *port = ctx->info->port;
1235
1236         ctx->data.s32_val = port->priority;
1237         return 0;
1238 }
1239
1240 static int team_priority_option_set(struct team *team,
1241                                     struct team_gsetter_ctx *ctx)
1242 {
1243         struct team_port *port = ctx->info->port;
1244
1245         port->priority = ctx->data.s32_val;
1246         team_queue_override_port_refresh(team, port);
1247         return 0;
1248 }
1249
1250 static int team_queue_id_option_get(struct team *team,
1251                                     struct team_gsetter_ctx *ctx)
1252 {
1253         struct team_port *port = ctx->info->port;
1254
1255         ctx->data.u32_val = port->queue_id;
1256         return 0;
1257 }
1258
1259 static int team_queue_id_option_set(struct team *team,
1260                                     struct team_gsetter_ctx *ctx)
1261 {
1262         struct team_port *port = ctx->info->port;
1263
1264         if (port->queue_id == ctx->data.u32_val)
1265                 return 0;
1266         if (ctx->data.u32_val >= team->dev->real_num_tx_queues)
1267                 return -EINVAL;
1268         port->queue_id = ctx->data.u32_val;
1269         team_queue_override_port_refresh(team, port);
1270         return 0;
1271 }
1272
1273
1274 static const struct team_option team_options[] = {
1275         {
1276                 .name = "mode",
1277                 .type = TEAM_OPTION_TYPE_STRING,
1278                 .getter = team_mode_option_get,
1279                 .setter = team_mode_option_set,
1280         },
1281         {
1282                 .name = "enabled",
1283                 .type = TEAM_OPTION_TYPE_BOOL,
1284                 .per_port = true,
1285                 .getter = team_port_en_option_get,
1286                 .setter = team_port_en_option_set,
1287         },
1288         {
1289                 .name = "user_linkup",
1290                 .type = TEAM_OPTION_TYPE_BOOL,
1291                 .per_port = true,
1292                 .getter = team_user_linkup_option_get,
1293                 .setter = team_user_linkup_option_set,
1294         },
1295         {
1296                 .name = "user_linkup_enabled",
1297                 .type = TEAM_OPTION_TYPE_BOOL,
1298                 .per_port = true,
1299                 .getter = team_user_linkup_en_option_get,
1300                 .setter = team_user_linkup_en_option_set,
1301         },
1302         {
1303                 .name = "priority",
1304                 .type = TEAM_OPTION_TYPE_S32,
1305                 .per_port = true,
1306                 .getter = team_priority_option_get,
1307                 .setter = team_priority_option_set,
1308         },
1309         {
1310                 .name = "queue_id",
1311                 .type = TEAM_OPTION_TYPE_U32,
1312                 .per_port = true,
1313                 .getter = team_queue_id_option_get,
1314                 .setter = team_queue_id_option_set,
1315         },
1316 };
1317
1318 static struct lock_class_key team_netdev_xmit_lock_key;
1319 static struct lock_class_key team_netdev_addr_lock_key;
1320 static struct lock_class_key team_tx_busylock_key;
1321
1322 static void team_set_lockdep_class_one(struct net_device *dev,
1323                                        struct netdev_queue *txq,
1324                                        void *unused)
1325 {
1326         lockdep_set_class(&txq->_xmit_lock, &team_netdev_xmit_lock_key);
1327 }
1328
1329 static void team_set_lockdep_class(struct net_device *dev)
1330 {
1331         lockdep_set_class(&dev->addr_list_lock, &team_netdev_addr_lock_key);
1332         netdev_for_each_tx_queue(dev, team_set_lockdep_class_one, NULL);
1333         dev->qdisc_tx_busylock = &team_tx_busylock_key;
1334 }
1335
1336 static int team_init(struct net_device *dev)
1337 {
1338         struct team *team = netdev_priv(dev);
1339         int i;
1340         int err;
1341
1342         team->dev = dev;
1343         mutex_init(&team->lock);
1344         team_set_no_mode(team);
1345
1346         team->pcpu_stats = alloc_percpu(struct team_pcpu_stats);
1347         if (!team->pcpu_stats)
1348                 return -ENOMEM;
1349
1350         for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1351                 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1352         INIT_LIST_HEAD(&team->port_list);
1353         err = team_queue_override_init(team);
1354         if (err)
1355                 goto err_team_queue_override_init;
1356
1357         team_adjust_ops(team);
1358
1359         INIT_LIST_HEAD(&team->option_list);
1360         INIT_LIST_HEAD(&team->option_inst_list);
1361         err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1362         if (err)
1363                 goto err_options_register;
1364         netif_carrier_off(dev);
1365
1366         team_set_lockdep_class(dev);
1367
1368         return 0;
1369
1370 err_options_register:
1371         team_queue_override_fini(team);
1372 err_team_queue_override_init:
1373         free_percpu(team->pcpu_stats);
1374
1375         return err;
1376 }
1377
1378 static void team_uninit(struct net_device *dev)
1379 {
1380         struct team *team = netdev_priv(dev);
1381         struct team_port *port;
1382         struct team_port *tmp;
1383
1384         mutex_lock(&team->lock);
1385         list_for_each_entry_safe(port, tmp, &team->port_list, list)
1386                 team_port_del(team, port->dev);
1387
1388         __team_change_mode(team, NULL); /* cleanup */
1389         __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1390         team_queue_override_fini(team);
1391         mutex_unlock(&team->lock);
1392 }
1393
1394 static void team_destructor(struct net_device *dev)
1395 {
1396         struct team *team = netdev_priv(dev);
1397
1398         free_percpu(team->pcpu_stats);
1399         free_netdev(dev);
1400 }
1401
1402 static int team_open(struct net_device *dev)
1403 {
1404         return 0;
1405 }
1406
1407 static int team_close(struct net_device *dev)
1408 {
1409         return 0;
1410 }
1411
1412 /*
1413  * note: already called with rcu_read_lock
1414  */
1415 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1416 {
1417         struct team *team = netdev_priv(dev);
1418         bool tx_success;
1419         unsigned int len = skb->len;
1420
1421         tx_success = team_queue_override_transmit(team, skb);
1422         if (!tx_success)
1423                 tx_success = team->ops.transmit(team, skb);
1424         if (tx_success) {
1425                 struct team_pcpu_stats *pcpu_stats;
1426
1427                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1428                 u64_stats_update_begin(&pcpu_stats->syncp);
1429                 pcpu_stats->tx_packets++;
1430                 pcpu_stats->tx_bytes += len;
1431                 u64_stats_update_end(&pcpu_stats->syncp);
1432         } else {
1433                 this_cpu_inc(team->pcpu_stats->tx_dropped);
1434         }
1435
1436         return NETDEV_TX_OK;
1437 }
1438
1439 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb)
1440 {
1441         /*
1442          * This helper function exists to help dev_pick_tx get the correct
1443          * destination queue.  Using a helper function skips a call to
1444          * skb_tx_hash and will put the skbs in the queue we expect on their
1445          * way down to the team driver.
1446          */
1447         u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1448
1449         /*
1450          * Save the original txq to restore before passing to the driver
1451          */
1452         qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1453
1454         if (unlikely(txq >= dev->real_num_tx_queues)) {
1455                 do {
1456                         txq -= dev->real_num_tx_queues;
1457                 } while (txq >= dev->real_num_tx_queues);
1458         }
1459         return txq;
1460 }
1461
1462 static void team_change_rx_flags(struct net_device *dev, int change)
1463 {
1464         struct team *team = netdev_priv(dev);
1465         struct team_port *port;
1466         int inc;
1467
1468         rcu_read_lock();
1469         list_for_each_entry_rcu(port, &team->port_list, list) {
1470                 if (change & IFF_PROMISC) {
1471                         inc = dev->flags & IFF_PROMISC ? 1 : -1;
1472                         dev_set_promiscuity(port->dev, inc);
1473                 }
1474                 if (change & IFF_ALLMULTI) {
1475                         inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1476                         dev_set_allmulti(port->dev, inc);
1477                 }
1478         }
1479         rcu_read_unlock();
1480 }
1481
1482 static void team_set_rx_mode(struct net_device *dev)
1483 {
1484         struct team *team = netdev_priv(dev);
1485         struct team_port *port;
1486
1487         rcu_read_lock();
1488         list_for_each_entry_rcu(port, &team->port_list, list) {
1489                 dev_uc_sync(port->dev, dev);
1490                 dev_mc_sync(port->dev, dev);
1491         }
1492         rcu_read_unlock();
1493 }
1494
1495 static int team_set_mac_address(struct net_device *dev, void *p)
1496 {
1497         struct sockaddr *addr = p;
1498         struct team *team = netdev_priv(dev);
1499         struct team_port *port;
1500
1501         if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1502                 return -EADDRNOTAVAIL;
1503         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1504         rcu_read_lock();
1505         list_for_each_entry_rcu(port, &team->port_list, list)
1506                 if (team->ops.port_change_dev_addr)
1507                         team->ops.port_change_dev_addr(team, port);
1508         rcu_read_unlock();
1509         return 0;
1510 }
1511
1512 static int team_change_mtu(struct net_device *dev, int new_mtu)
1513 {
1514         struct team *team = netdev_priv(dev);
1515         struct team_port *port;
1516         int err;
1517
1518         /*
1519          * Alhough this is reader, it's guarded by team lock. It's not possible
1520          * to traverse list in reverse under rcu_read_lock
1521          */
1522         mutex_lock(&team->lock);
1523         list_for_each_entry(port, &team->port_list, list) {
1524                 err = dev_set_mtu(port->dev, new_mtu);
1525                 if (err) {
1526                         netdev_err(dev, "Device %s failed to change mtu",
1527                                    port->dev->name);
1528                         goto unwind;
1529                 }
1530         }
1531         mutex_unlock(&team->lock);
1532
1533         dev->mtu = new_mtu;
1534
1535         return 0;
1536
1537 unwind:
1538         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1539                 dev_set_mtu(port->dev, dev->mtu);
1540         mutex_unlock(&team->lock);
1541
1542         return err;
1543 }
1544
1545 static struct rtnl_link_stats64 *
1546 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1547 {
1548         struct team *team = netdev_priv(dev);
1549         struct team_pcpu_stats *p;
1550         u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1551         u32 rx_dropped = 0, tx_dropped = 0;
1552         unsigned int start;
1553         int i;
1554
1555         for_each_possible_cpu(i) {
1556                 p = per_cpu_ptr(team->pcpu_stats, i);
1557                 do {
1558                         start = u64_stats_fetch_begin_bh(&p->syncp);
1559                         rx_packets      = p->rx_packets;
1560                         rx_bytes        = p->rx_bytes;
1561                         rx_multicast    = p->rx_multicast;
1562                         tx_packets      = p->tx_packets;
1563                         tx_bytes        = p->tx_bytes;
1564                 } while (u64_stats_fetch_retry_bh(&p->syncp, start));
1565
1566                 stats->rx_packets       += rx_packets;
1567                 stats->rx_bytes         += rx_bytes;
1568                 stats->multicast        += rx_multicast;
1569                 stats->tx_packets       += tx_packets;
1570                 stats->tx_bytes         += tx_bytes;
1571                 /*
1572                  * rx_dropped & tx_dropped are u32, updated
1573                  * without syncp protection.
1574                  */
1575                 rx_dropped      += p->rx_dropped;
1576                 tx_dropped      += p->tx_dropped;
1577         }
1578         stats->rx_dropped       = rx_dropped;
1579         stats->tx_dropped       = tx_dropped;
1580         return stats;
1581 }
1582
1583 static int team_vlan_rx_add_vid(struct net_device *dev, uint16_t vid)
1584 {
1585         struct team *team = netdev_priv(dev);
1586         struct team_port *port;
1587         int err;
1588
1589         /*
1590          * Alhough this is reader, it's guarded by team lock. It's not possible
1591          * to traverse list in reverse under rcu_read_lock
1592          */
1593         mutex_lock(&team->lock);
1594         list_for_each_entry(port, &team->port_list, list) {
1595                 err = vlan_vid_add(port->dev, vid);
1596                 if (err)
1597                         goto unwind;
1598         }
1599         mutex_unlock(&team->lock);
1600
1601         return 0;
1602
1603 unwind:
1604         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1605                 vlan_vid_del(port->dev, vid);
1606         mutex_unlock(&team->lock);
1607
1608         return err;
1609 }
1610
1611 static int team_vlan_rx_kill_vid(struct net_device *dev, uint16_t vid)
1612 {
1613         struct team *team = netdev_priv(dev);
1614         struct team_port *port;
1615
1616         rcu_read_lock();
1617         list_for_each_entry_rcu(port, &team->port_list, list)
1618                 vlan_vid_del(port->dev, vid);
1619         rcu_read_unlock();
1620
1621         return 0;
1622 }
1623
1624 #ifdef CONFIG_NET_POLL_CONTROLLER
1625 static void team_poll_controller(struct net_device *dev)
1626 {
1627 }
1628
1629 static void __team_netpoll_cleanup(struct team *team)
1630 {
1631         struct team_port *port;
1632
1633         list_for_each_entry(port, &team->port_list, list)
1634                 team_port_disable_netpoll(port);
1635 }
1636
1637 static void team_netpoll_cleanup(struct net_device *dev)
1638 {
1639         struct team *team = netdev_priv(dev);
1640
1641         mutex_lock(&team->lock);
1642         __team_netpoll_cleanup(team);
1643         mutex_unlock(&team->lock);
1644 }
1645
1646 static int team_netpoll_setup(struct net_device *dev,
1647                               struct netpoll_info *npifo, gfp_t gfp)
1648 {
1649         struct team *team = netdev_priv(dev);
1650         struct team_port *port;
1651         int err = 0;
1652
1653         mutex_lock(&team->lock);
1654         list_for_each_entry(port, &team->port_list, list) {
1655                 err = team_port_enable_netpoll(team, port, gfp);
1656                 if (err) {
1657                         __team_netpoll_cleanup(team);
1658                         break;
1659                 }
1660         }
1661         mutex_unlock(&team->lock);
1662         return err;
1663 }
1664 #endif
1665
1666 static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
1667 {
1668         struct team *team = netdev_priv(dev);
1669         int err;
1670
1671         mutex_lock(&team->lock);
1672         err = team_port_add(team, port_dev);
1673         mutex_unlock(&team->lock);
1674         return err;
1675 }
1676
1677 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1678 {
1679         struct team *team = netdev_priv(dev);
1680         int err;
1681
1682         mutex_lock(&team->lock);
1683         err = team_port_del(team, port_dev);
1684         mutex_unlock(&team->lock);
1685         return err;
1686 }
1687
1688 static netdev_features_t team_fix_features(struct net_device *dev,
1689                                            netdev_features_t features)
1690 {
1691         struct team_port *port;
1692         struct team *team = netdev_priv(dev);
1693         netdev_features_t mask;
1694
1695         mask = features;
1696         features &= ~NETIF_F_ONE_FOR_ALL;
1697         features |= NETIF_F_ALL_FOR_ALL;
1698
1699         rcu_read_lock();
1700         list_for_each_entry_rcu(port, &team->port_list, list) {
1701                 features = netdev_increment_features(features,
1702                                                      port->dev->features,
1703                                                      mask);
1704         }
1705         rcu_read_unlock();
1706         return features;
1707 }
1708
1709 static int team_change_carrier(struct net_device *dev, bool new_carrier)
1710 {
1711         if (new_carrier)
1712                 netif_carrier_on(dev);
1713         else
1714                 netif_carrier_off(dev);
1715         return 0;
1716 }
1717
1718 static const struct net_device_ops team_netdev_ops = {
1719         .ndo_init               = team_init,
1720         .ndo_uninit             = team_uninit,
1721         .ndo_open               = team_open,
1722         .ndo_stop               = team_close,
1723         .ndo_start_xmit         = team_xmit,
1724         .ndo_select_queue       = team_select_queue,
1725         .ndo_change_rx_flags    = team_change_rx_flags,
1726         .ndo_set_rx_mode        = team_set_rx_mode,
1727         .ndo_set_mac_address    = team_set_mac_address,
1728         .ndo_change_mtu         = team_change_mtu,
1729         .ndo_get_stats64        = team_get_stats64,
1730         .ndo_vlan_rx_add_vid    = team_vlan_rx_add_vid,
1731         .ndo_vlan_rx_kill_vid   = team_vlan_rx_kill_vid,
1732 #ifdef CONFIG_NET_POLL_CONTROLLER
1733         .ndo_poll_controller    = team_poll_controller,
1734         .ndo_netpoll_setup      = team_netpoll_setup,
1735         .ndo_netpoll_cleanup    = team_netpoll_cleanup,
1736 #endif
1737         .ndo_add_slave          = team_add_slave,
1738         .ndo_del_slave          = team_del_slave,
1739         .ndo_fix_features       = team_fix_features,
1740         .ndo_change_carrier     = team_change_carrier,
1741 };
1742
1743 /***********************
1744  * ethtool interface
1745  ***********************/
1746
1747 static void team_ethtool_get_drvinfo(struct net_device *dev,
1748                                      struct ethtool_drvinfo *drvinfo)
1749 {
1750         strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
1751         strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
1752 }
1753
1754 static const struct ethtool_ops team_ethtool_ops = {
1755         .get_drvinfo            = team_ethtool_get_drvinfo,
1756         .get_link               = ethtool_op_get_link,
1757 };
1758
1759 /***********************
1760  * rt netlink interface
1761  ***********************/
1762
1763 static void team_setup_by_port(struct net_device *dev,
1764                                struct net_device *port_dev)
1765 {
1766         dev->header_ops = port_dev->header_ops;
1767         dev->type = port_dev->type;
1768         dev->hard_header_len = port_dev->hard_header_len;
1769         dev->addr_len = port_dev->addr_len;
1770         dev->mtu = port_dev->mtu;
1771         memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
1772         memcpy(dev->dev_addr, port_dev->dev_addr, port_dev->addr_len);
1773 }
1774
1775 static int team_dev_type_check_change(struct net_device *dev,
1776                                       struct net_device *port_dev)
1777 {
1778         struct team *team = netdev_priv(dev);
1779         char *portname = port_dev->name;
1780         int err;
1781
1782         if (dev->type == port_dev->type)
1783                 return 0;
1784         if (!list_empty(&team->port_list)) {
1785                 netdev_err(dev, "Device %s is of different type\n", portname);
1786                 return -EBUSY;
1787         }
1788         err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
1789         err = notifier_to_errno(err);
1790         if (err) {
1791                 netdev_err(dev, "Refused to change device type\n");
1792                 return err;
1793         }
1794         dev_uc_flush(dev);
1795         dev_mc_flush(dev);
1796         team_setup_by_port(dev, port_dev);
1797         call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
1798         return 0;
1799 }
1800
1801 static void team_setup(struct net_device *dev)
1802 {
1803         ether_setup(dev);
1804
1805         dev->netdev_ops = &team_netdev_ops;
1806         dev->ethtool_ops = &team_ethtool_ops;
1807         dev->destructor = team_destructor;
1808         dev->tx_queue_len = 0;
1809         dev->flags |= IFF_MULTICAST;
1810         dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
1811
1812         /*
1813          * Indicate we support unicast address filtering. That way core won't
1814          * bring us to promisc mode in case a unicast addr is added.
1815          * Let this up to underlay drivers.
1816          */
1817         dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
1818
1819         dev->features |= NETIF_F_LLTX;
1820         dev->features |= NETIF_F_GRO;
1821         dev->hw_features = TEAM_VLAN_FEATURES |
1822                            NETIF_F_HW_VLAN_TX |
1823                            NETIF_F_HW_VLAN_RX |
1824                            NETIF_F_HW_VLAN_FILTER;
1825
1826         dev->hw_features &= ~(NETIF_F_ALL_CSUM & ~NETIF_F_HW_CSUM);
1827         dev->features |= dev->hw_features;
1828 }
1829
1830 static int team_newlink(struct net *src_net, struct net_device *dev,
1831                         struct nlattr *tb[], struct nlattr *data[])
1832 {
1833         int err;
1834
1835         if (tb[IFLA_ADDRESS] == NULL)
1836                 eth_hw_addr_random(dev);
1837
1838         err = register_netdevice(dev);
1839         if (err)
1840                 return err;
1841
1842         return 0;
1843 }
1844
1845 static int team_validate(struct nlattr *tb[], struct nlattr *data[])
1846 {
1847         if (tb[IFLA_ADDRESS]) {
1848                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
1849                         return -EINVAL;
1850                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
1851                         return -EADDRNOTAVAIL;
1852         }
1853         return 0;
1854 }
1855
1856 static unsigned int team_get_num_tx_queues(void)
1857 {
1858         return TEAM_DEFAULT_NUM_TX_QUEUES;
1859 }
1860
1861 static unsigned int team_get_num_rx_queues(void)
1862 {
1863         return TEAM_DEFAULT_NUM_RX_QUEUES;
1864 }
1865
1866 static struct rtnl_link_ops team_link_ops __read_mostly = {
1867         .kind                   = DRV_NAME,
1868         .priv_size              = sizeof(struct team),
1869         .setup                  = team_setup,
1870         .newlink                = team_newlink,
1871         .validate               = team_validate,
1872         .get_num_tx_queues      = team_get_num_tx_queues,
1873         .get_num_rx_queues      = team_get_num_rx_queues,
1874 };
1875
1876
1877 /***********************************
1878  * Generic netlink custom interface
1879  ***********************************/
1880
1881 static struct genl_family team_nl_family = {
1882         .id             = GENL_ID_GENERATE,
1883         .name           = TEAM_GENL_NAME,
1884         .version        = TEAM_GENL_VERSION,
1885         .maxattr        = TEAM_ATTR_MAX,
1886         .netnsok        = true,
1887 };
1888
1889 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
1890         [TEAM_ATTR_UNSPEC]                      = { .type = NLA_UNSPEC, },
1891         [TEAM_ATTR_TEAM_IFINDEX]                = { .type = NLA_U32 },
1892         [TEAM_ATTR_LIST_OPTION]                 = { .type = NLA_NESTED },
1893         [TEAM_ATTR_LIST_PORT]                   = { .type = NLA_NESTED },
1894 };
1895
1896 static const struct nla_policy
1897 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
1898         [TEAM_ATTR_OPTION_UNSPEC]               = { .type = NLA_UNSPEC, },
1899         [TEAM_ATTR_OPTION_NAME] = {
1900                 .type = NLA_STRING,
1901                 .len = TEAM_STRING_MAX_LEN,
1902         },
1903         [TEAM_ATTR_OPTION_CHANGED]              = { .type = NLA_FLAG },
1904         [TEAM_ATTR_OPTION_TYPE]                 = { .type = NLA_U8 },
1905         [TEAM_ATTR_OPTION_DATA]                 = { .type = NLA_BINARY },
1906 };
1907
1908 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
1909 {
1910         struct sk_buff *msg;
1911         void *hdr;
1912         int err;
1913
1914         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1915         if (!msg)
1916                 return -ENOMEM;
1917
1918         hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
1919                           &team_nl_family, 0, TEAM_CMD_NOOP);
1920         if (!hdr) {
1921                 err = -EMSGSIZE;
1922                 goto err_msg_put;
1923         }
1924
1925         genlmsg_end(msg, hdr);
1926
1927         return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
1928
1929 err_msg_put:
1930         nlmsg_free(msg);
1931
1932         return err;
1933 }
1934
1935 /*
1936  * Netlink cmd functions should be locked by following two functions.
1937  * Since dev gets held here, that ensures dev won't disappear in between.
1938  */
1939 static struct team *team_nl_team_get(struct genl_info *info)
1940 {
1941         struct net *net = genl_info_net(info);
1942         int ifindex;
1943         struct net_device *dev;
1944         struct team *team;
1945
1946         if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
1947                 return NULL;
1948
1949         ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
1950         dev = dev_get_by_index(net, ifindex);
1951         if (!dev || dev->netdev_ops != &team_netdev_ops) {
1952                 if (dev)
1953                         dev_put(dev);
1954                 return NULL;
1955         }
1956
1957         team = netdev_priv(dev);
1958         mutex_lock(&team->lock);
1959         return team;
1960 }
1961
1962 static void team_nl_team_put(struct team *team)
1963 {
1964         mutex_unlock(&team->lock);
1965         dev_put(team->dev);
1966 }
1967
1968 typedef int team_nl_send_func_t(struct sk_buff *skb,
1969                                 struct team *team, u32 portid);
1970
1971 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
1972 {
1973         return genlmsg_unicast(dev_net(team->dev), skb, portid);
1974 }
1975
1976 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
1977                                        struct team_option_inst *opt_inst)
1978 {
1979         struct nlattr *option_item;
1980         struct team_option *option = opt_inst->option;
1981         struct team_option_inst_info *opt_inst_info = &opt_inst->info;
1982         struct team_gsetter_ctx ctx;
1983         int err;
1984
1985         ctx.info = opt_inst_info;
1986         err = team_option_get(team, opt_inst, &ctx);
1987         if (err)
1988                 return err;
1989
1990         option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
1991         if (!option_item)
1992                 return -EMSGSIZE;
1993
1994         if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
1995                 goto nest_cancel;
1996         if (opt_inst_info->port &&
1997             nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
1998                         opt_inst_info->port->dev->ifindex))
1999                 goto nest_cancel;
2000         if (opt_inst->option->array_size &&
2001             nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2002                         opt_inst_info->array_index))
2003                 goto nest_cancel;
2004
2005         switch (option->type) {
2006         case TEAM_OPTION_TYPE_U32:
2007                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2008                         goto nest_cancel;
2009                 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2010                         goto nest_cancel;
2011                 break;
2012         case TEAM_OPTION_TYPE_STRING:
2013                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2014                         goto nest_cancel;
2015                 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2016                                    ctx.data.str_val))
2017                         goto nest_cancel;
2018                 break;
2019         case TEAM_OPTION_TYPE_BINARY:
2020                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2021                         goto nest_cancel;
2022                 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2023                             ctx.data.bin_val.ptr))
2024                         goto nest_cancel;
2025                 break;
2026         case TEAM_OPTION_TYPE_BOOL:
2027                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2028                         goto nest_cancel;
2029                 if (ctx.data.bool_val &&
2030                     nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2031                         goto nest_cancel;
2032                 break;
2033         case TEAM_OPTION_TYPE_S32:
2034                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2035                         goto nest_cancel;
2036                 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2037                         goto nest_cancel;
2038                 break;
2039         default:
2040                 BUG();
2041         }
2042         if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2043                 goto nest_cancel;
2044         if (opt_inst->changed) {
2045                 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2046                         goto nest_cancel;
2047                 opt_inst->changed = false;
2048         }
2049         nla_nest_end(skb, option_item);
2050         return 0;
2051
2052 nest_cancel:
2053         nla_nest_cancel(skb, option_item);
2054         return -EMSGSIZE;
2055 }
2056
2057 static int __send_and_alloc_skb(struct sk_buff **pskb,
2058                                 struct team *team, u32 portid,
2059                                 team_nl_send_func_t *send_func)
2060 {
2061         int err;
2062
2063         if (*pskb) {
2064                 err = send_func(*pskb, team, portid);
2065                 if (err)
2066                         return err;
2067         }
2068         *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2069         if (!*pskb)
2070                 return -ENOMEM;
2071         return 0;
2072 }
2073
2074 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2075                                     int flags, team_nl_send_func_t *send_func,
2076                                     struct list_head *sel_opt_inst_list)
2077 {
2078         struct nlattr *option_list;
2079         struct nlmsghdr *nlh;
2080         void *hdr;
2081         struct team_option_inst *opt_inst;
2082         int err;
2083         struct sk_buff *skb = NULL;
2084         bool incomplete;
2085         int i;
2086
2087         opt_inst = list_first_entry(sel_opt_inst_list,
2088                                     struct team_option_inst, tmp_list);
2089
2090 start_again:
2091         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2092         if (err)
2093                 return err;
2094
2095         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2096                           TEAM_CMD_OPTIONS_GET);
2097         if (!hdr)
2098                 return -EMSGSIZE;
2099
2100         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2101                 goto nla_put_failure;
2102         option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2103         if (!option_list)
2104                 goto nla_put_failure;
2105
2106         i = 0;
2107         incomplete = false;
2108         list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2109                 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2110                 if (err) {
2111                         if (err == -EMSGSIZE) {
2112                                 if (!i)
2113                                         goto errout;
2114                                 incomplete = true;
2115                                 break;
2116                         }
2117                         goto errout;
2118                 }
2119                 i++;
2120         }
2121
2122         nla_nest_end(skb, option_list);
2123         genlmsg_end(skb, hdr);
2124         if (incomplete)
2125                 goto start_again;
2126
2127 send_done:
2128         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2129         if (!nlh) {
2130                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2131                 if (err)
2132                         goto errout;
2133                 goto send_done;
2134         }
2135
2136         return send_func(skb, team, portid);
2137
2138 nla_put_failure:
2139         err = -EMSGSIZE;
2140 errout:
2141         genlmsg_cancel(skb, hdr);
2142         nlmsg_free(skb);
2143         return err;
2144 }
2145
2146 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2147 {
2148         struct team *team;
2149         struct team_option_inst *opt_inst;
2150         int err;
2151         LIST_HEAD(sel_opt_inst_list);
2152
2153         team = team_nl_team_get(info);
2154         if (!team)
2155                 return -EINVAL;
2156
2157         list_for_each_entry(opt_inst, &team->option_inst_list, list)
2158                 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2159         err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2160                                        NLM_F_ACK, team_nl_send_unicast,
2161                                        &sel_opt_inst_list);
2162
2163         team_nl_team_put(team);
2164
2165         return err;
2166 }
2167
2168 static int team_nl_send_event_options_get(struct team *team,
2169                                           struct list_head *sel_opt_inst_list);
2170
2171 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2172 {
2173         struct team *team;
2174         int err = 0;
2175         int i;
2176         struct nlattr *nl_option;
2177         LIST_HEAD(opt_inst_list);
2178
2179         team = team_nl_team_get(info);
2180         if (!team)
2181                 return -EINVAL;
2182
2183         err = -EINVAL;
2184         if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2185                 err = -EINVAL;
2186                 goto team_put;
2187         }
2188
2189         nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2190                 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2191                 struct nlattr *attr;
2192                 struct nlattr *attr_data;
2193                 enum team_option_type opt_type;
2194                 int opt_port_ifindex = 0; /* != 0 for per-port options */
2195                 u32 opt_array_index = 0;
2196                 bool opt_is_array = false;
2197                 struct team_option_inst *opt_inst;
2198                 char *opt_name;
2199                 bool opt_found = false;
2200
2201                 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2202                         err = -EINVAL;
2203                         goto team_put;
2204                 }
2205                 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2206                                        nl_option, team_nl_option_policy);
2207                 if (err)
2208                         goto team_put;
2209                 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2210                     !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2211                         err = -EINVAL;
2212                         goto team_put;
2213                 }
2214                 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2215                 case NLA_U32:
2216                         opt_type = TEAM_OPTION_TYPE_U32;
2217                         break;
2218                 case NLA_STRING:
2219                         opt_type = TEAM_OPTION_TYPE_STRING;
2220                         break;
2221                 case NLA_BINARY:
2222                         opt_type = TEAM_OPTION_TYPE_BINARY;
2223                         break;
2224                 case NLA_FLAG:
2225                         opt_type = TEAM_OPTION_TYPE_BOOL;
2226                         break;
2227                 case NLA_S32:
2228                         opt_type = TEAM_OPTION_TYPE_S32;
2229                         break;
2230                 default:
2231                         goto team_put;
2232                 }
2233
2234                 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2235                 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2236                         err = -EINVAL;
2237                         goto team_put;
2238                 }
2239
2240                 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2241                 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2242                 if (attr)
2243                         opt_port_ifindex = nla_get_u32(attr);
2244
2245                 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2246                 if (attr) {
2247                         opt_is_array = true;
2248                         opt_array_index = nla_get_u32(attr);
2249                 }
2250
2251                 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2252                         struct team_option *option = opt_inst->option;
2253                         struct team_gsetter_ctx ctx;
2254                         struct team_option_inst_info *opt_inst_info;
2255                         int tmp_ifindex;
2256
2257                         opt_inst_info = &opt_inst->info;
2258                         tmp_ifindex = opt_inst_info->port ?
2259                                       opt_inst_info->port->dev->ifindex : 0;
2260                         if (option->type != opt_type ||
2261                             strcmp(option->name, opt_name) ||
2262                             tmp_ifindex != opt_port_ifindex ||
2263                             (option->array_size && !opt_is_array) ||
2264                             opt_inst_info->array_index != opt_array_index)
2265                                 continue;
2266                         opt_found = true;
2267                         ctx.info = opt_inst_info;
2268                         switch (opt_type) {
2269                         case TEAM_OPTION_TYPE_U32:
2270                                 ctx.data.u32_val = nla_get_u32(attr_data);
2271                                 break;
2272                         case TEAM_OPTION_TYPE_STRING:
2273                                 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2274                                         err = -EINVAL;
2275                                         goto team_put;
2276                                 }
2277                                 ctx.data.str_val = nla_data(attr_data);
2278                                 break;
2279                         case TEAM_OPTION_TYPE_BINARY:
2280                                 ctx.data.bin_val.len = nla_len(attr_data);
2281                                 ctx.data.bin_val.ptr = nla_data(attr_data);
2282                                 break;
2283                         case TEAM_OPTION_TYPE_BOOL:
2284                                 ctx.data.bool_val = attr_data ? true : false;
2285                                 break;
2286                         case TEAM_OPTION_TYPE_S32:
2287                                 ctx.data.s32_val = nla_get_s32(attr_data);
2288                                 break;
2289                         default:
2290                                 BUG();
2291                         }
2292                         err = team_option_set(team, opt_inst, &ctx);
2293                         if (err)
2294                                 goto team_put;
2295                         opt_inst->changed = true;
2296                         list_add(&opt_inst->tmp_list, &opt_inst_list);
2297                 }
2298                 if (!opt_found) {
2299                         err = -ENOENT;
2300                         goto team_put;
2301                 }
2302         }
2303
2304         err = team_nl_send_event_options_get(team, &opt_inst_list);
2305
2306 team_put:
2307         team_nl_team_put(team);
2308
2309         return err;
2310 }
2311
2312 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2313                                      struct team_port *port)
2314 {
2315         struct nlattr *port_item;
2316
2317         port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2318         if (!port_item)
2319                 goto nest_cancel;
2320         if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2321                 goto nest_cancel;
2322         if (port->changed) {
2323                 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2324                         goto nest_cancel;
2325                 port->changed = false;
2326         }
2327         if ((port->removed &&
2328              nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2329             (port->state.linkup &&
2330              nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2331             nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2332             nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2333                 goto nest_cancel;
2334         nla_nest_end(skb, port_item);
2335         return 0;
2336
2337 nest_cancel:
2338         nla_nest_cancel(skb, port_item);
2339         return -EMSGSIZE;
2340 }
2341
2342 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2343                                       int flags, team_nl_send_func_t *send_func,
2344                                       struct team_port *one_port)
2345 {
2346         struct nlattr *port_list;
2347         struct nlmsghdr *nlh;
2348         void *hdr;
2349         struct team_port *port;
2350         int err;
2351         struct sk_buff *skb = NULL;
2352         bool incomplete;
2353         int i;
2354
2355         port = list_first_entry(&team->port_list, struct team_port, list);
2356
2357 start_again:
2358         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2359         if (err)
2360                 return err;
2361
2362         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2363                           TEAM_CMD_PORT_LIST_GET);
2364         if (!hdr)
2365                 return -EMSGSIZE;
2366
2367         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2368                 goto nla_put_failure;
2369         port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2370         if (!port_list)
2371                 goto nla_put_failure;
2372
2373         i = 0;
2374         incomplete = false;
2375
2376         /* If one port is selected, called wants to send port list containing
2377          * only this port. Otherwise go through all listed ports and send all
2378          */
2379         if (one_port) {
2380                 err = team_nl_fill_one_port_get(skb, one_port);
2381                 if (err)
2382                         goto errout;
2383         } else {
2384                 list_for_each_entry(port, &team->port_list, list) {
2385                         err = team_nl_fill_one_port_get(skb, port);
2386                         if (err) {
2387                                 if (err == -EMSGSIZE) {
2388                                         if (!i)
2389                                                 goto errout;
2390                                         incomplete = true;
2391                                         break;
2392                                 }
2393                                 goto errout;
2394                         }
2395                         i++;
2396                 }
2397         }
2398
2399         nla_nest_end(skb, port_list);
2400         genlmsg_end(skb, hdr);
2401         if (incomplete)
2402                 goto start_again;
2403
2404 send_done:
2405         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2406         if (!nlh) {
2407                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2408                 if (err)
2409                         goto errout;
2410                 goto send_done;
2411         }
2412
2413         return send_func(skb, team, portid);
2414
2415 nla_put_failure:
2416         err = -EMSGSIZE;
2417 errout:
2418         genlmsg_cancel(skb, hdr);
2419         nlmsg_free(skb);
2420         return err;
2421 }
2422
2423 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2424                                      struct genl_info *info)
2425 {
2426         struct team *team;
2427         int err;
2428
2429         team = team_nl_team_get(info);
2430         if (!team)
2431                 return -EINVAL;
2432
2433         err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2434                                          NLM_F_ACK, team_nl_send_unicast, NULL);
2435
2436         team_nl_team_put(team);
2437
2438         return err;
2439 }
2440
2441 static struct genl_ops team_nl_ops[] = {
2442         {
2443                 .cmd = TEAM_CMD_NOOP,
2444                 .doit = team_nl_cmd_noop,
2445                 .policy = team_nl_policy,
2446         },
2447         {
2448                 .cmd = TEAM_CMD_OPTIONS_SET,
2449                 .doit = team_nl_cmd_options_set,
2450                 .policy = team_nl_policy,
2451                 .flags = GENL_ADMIN_PERM,
2452         },
2453         {
2454                 .cmd = TEAM_CMD_OPTIONS_GET,
2455                 .doit = team_nl_cmd_options_get,
2456                 .policy = team_nl_policy,
2457                 .flags = GENL_ADMIN_PERM,
2458         },
2459         {
2460                 .cmd = TEAM_CMD_PORT_LIST_GET,
2461                 .doit = team_nl_cmd_port_list_get,
2462                 .policy = team_nl_policy,
2463                 .flags = GENL_ADMIN_PERM,
2464         },
2465 };
2466
2467 static struct genl_multicast_group team_change_event_mcgrp = {
2468         .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME,
2469 };
2470
2471 static int team_nl_send_multicast(struct sk_buff *skb,
2472                                   struct team *team, u32 portid)
2473 {
2474         return genlmsg_multicast_netns(dev_net(team->dev), skb, 0,
2475                                        team_change_event_mcgrp.id, GFP_KERNEL);
2476 }
2477
2478 static int team_nl_send_event_options_get(struct team *team,
2479                                           struct list_head *sel_opt_inst_list)
2480 {
2481         return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2482                                         sel_opt_inst_list);
2483 }
2484
2485 static int team_nl_send_event_port_get(struct team *team,
2486                                        struct team_port *port)
2487 {
2488         return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2489                                           port);
2490 }
2491
2492 static int team_nl_init(void)
2493 {
2494         int err;
2495
2496         err = genl_register_family_with_ops(&team_nl_family, team_nl_ops,
2497                                             ARRAY_SIZE(team_nl_ops));
2498         if (err)
2499                 return err;
2500
2501         err = genl_register_mc_group(&team_nl_family, &team_change_event_mcgrp);
2502         if (err)
2503                 goto err_change_event_grp_reg;
2504
2505         return 0;
2506
2507 err_change_event_grp_reg:
2508         genl_unregister_family(&team_nl_family);
2509
2510         return err;
2511 }
2512
2513 static void team_nl_fini(void)
2514 {
2515         genl_unregister_family(&team_nl_family);
2516 }
2517
2518
2519 /******************
2520  * Change checkers
2521  ******************/
2522
2523 static void __team_options_change_check(struct team *team)
2524 {
2525         int err;
2526         struct team_option_inst *opt_inst;
2527         LIST_HEAD(sel_opt_inst_list);
2528
2529         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2530                 if (opt_inst->changed)
2531                         list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2532         }
2533         err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2534         if (err && err != -ESRCH)
2535                 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2536                             err);
2537 }
2538
2539 /* rtnl lock is held */
2540
2541 static void __team_port_change_send(struct team_port *port, bool linkup)
2542 {
2543         int err;
2544
2545         port->changed = true;
2546         port->state.linkup = linkup;
2547         team_refresh_port_linkup(port);
2548         if (linkup) {
2549                 struct ethtool_cmd ecmd;
2550
2551                 err = __ethtool_get_settings(port->dev, &ecmd);
2552                 if (!err) {
2553                         port->state.speed = ethtool_cmd_speed(&ecmd);
2554                         port->state.duplex = ecmd.duplex;
2555                         goto send_event;
2556                 }
2557         }
2558         port->state.speed = 0;
2559         port->state.duplex = 0;
2560
2561 send_event:
2562         err = team_nl_send_event_port_get(port->team, port);
2563         if (err && err != -ESRCH)
2564                 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2565                             port->dev->name, err);
2566
2567 }
2568
2569 static void __team_carrier_check(struct team *team)
2570 {
2571         struct team_port *port;
2572         bool team_linkup;
2573
2574         team_linkup = false;
2575         list_for_each_entry(port, &team->port_list, list) {
2576                 if (port->linkup) {
2577                         team_linkup = true;
2578                         break;
2579                 }
2580         }
2581
2582         if (team_linkup)
2583                 netif_carrier_on(team->dev);
2584         else
2585                 netif_carrier_off(team->dev);
2586 }
2587
2588 static void __team_port_change_check(struct team_port *port, bool linkup)
2589 {
2590         if (port->state.linkup != linkup)
2591                 __team_port_change_send(port, linkup);
2592         __team_carrier_check(port->team);
2593 }
2594
2595 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2596 {
2597         __team_port_change_send(port, linkup);
2598         __team_carrier_check(port->team);
2599 }
2600
2601 static void __team_port_change_port_removed(struct team_port *port)
2602 {
2603         port->removed = true;
2604         __team_port_change_send(port, false);
2605         __team_carrier_check(port->team);
2606 }
2607
2608 static void team_port_change_check(struct team_port *port, bool linkup)
2609 {
2610         struct team *team = port->team;
2611
2612         mutex_lock(&team->lock);
2613         __team_port_change_check(port, linkup);
2614         mutex_unlock(&team->lock);
2615 }
2616
2617
2618 /************************************
2619  * Net device notifier event handler
2620  ************************************/
2621
2622 static int team_device_event(struct notifier_block *unused,
2623                              unsigned long event, void *ptr)
2624 {
2625         struct net_device *dev = (struct net_device *) ptr;
2626         struct team_port *port;
2627
2628         port = team_port_get_rtnl(dev);
2629         if (!port)
2630                 return NOTIFY_DONE;
2631
2632         switch (event) {
2633         case NETDEV_UP:
2634                 if (netif_carrier_ok(dev))
2635                         team_port_change_check(port, true);
2636         case NETDEV_DOWN:
2637                 team_port_change_check(port, false);
2638         case NETDEV_CHANGE:
2639                 if (netif_running(port->dev))
2640                         team_port_change_check(port,
2641                                                !!netif_carrier_ok(port->dev));
2642                 break;
2643         case NETDEV_UNREGISTER:
2644                 team_del_slave(port->team->dev, dev);
2645                 break;
2646         case NETDEV_FEAT_CHANGE:
2647                 team_compute_features(port->team);
2648                 break;
2649         case NETDEV_CHANGEMTU:
2650                 /* Forbid to change mtu of underlaying device */
2651                 return NOTIFY_BAD;
2652         case NETDEV_PRE_TYPE_CHANGE:
2653                 /* Forbid to change type of underlaying device */
2654                 return NOTIFY_BAD;
2655         }
2656         return NOTIFY_DONE;
2657 }
2658
2659 static struct notifier_block team_notifier_block __read_mostly = {
2660         .notifier_call = team_device_event,
2661 };
2662
2663
2664 /***********************
2665  * Module init and exit
2666  ***********************/
2667
2668 static int __init team_module_init(void)
2669 {
2670         int err;
2671
2672         register_netdevice_notifier(&team_notifier_block);
2673
2674         err = rtnl_link_register(&team_link_ops);
2675         if (err)
2676                 goto err_rtnl_reg;
2677
2678         err = team_nl_init();
2679         if (err)
2680                 goto err_nl_init;
2681
2682         return 0;
2683
2684 err_nl_init:
2685         rtnl_link_unregister(&team_link_ops);
2686
2687 err_rtnl_reg:
2688         unregister_netdevice_notifier(&team_notifier_block);
2689
2690         return err;
2691 }
2692
2693 static void __exit team_module_exit(void)
2694 {
2695         team_nl_fini();
2696         rtnl_link_unregister(&team_link_ops);
2697         unregister_netdevice_notifier(&team_notifier_block);
2698 }
2699
2700 module_init(team_module_init);
2701 module_exit(team_module_exit);
2702
2703 MODULE_LICENSE("GPL v2");
2704 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
2705 MODULE_DESCRIPTION("Ethernet team device driver");
2706 MODULE_ALIAS_RTNL_LINK(DRV_NAME);