Pileus Git - ~andy/linux/blob - 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_set_master(port_dev, dev);
1059         if (err) {
1060                 netdev_err(dev, "Device %s failed to set master\n", portname);
1061                 goto err_set_master;
1062         }
1063
1064         err = netdev_rx_handler_register(port_dev, team_handle_frame,
1065                                          port);
1066         if (err) {
1067                 netdev_err(dev, "Device %s failed to register rx_handler\n",
1068                            portname);
1069                 goto err_handler_register;
1070         }
1071
1072         err = __team_option_inst_add_port(team, port);
1073         if (err) {
1074                 netdev_err(dev, "Device %s failed to add per-port options\n",
1075                            portname);
1076                 goto err_option_port_add;
1077         }
1078
1079         port->index = -1;
1080         team_port_enable(team, port);
1081         list_add_tail_rcu(&port->list, &team->port_list);
1082         __team_compute_features(team);
1083         __team_port_change_port_added(port, !!netif_carrier_ok(port_dev));
1084         __team_options_change_check(team);
1085
1086         netdev_info(dev, "Port device %s added\n", portname);
1087
1088         return 0;
1089
1090 err_option_port_add:
1091         netdev_rx_handler_unregister(port_dev);
1092
1093 err_handler_register:
1094         netdev_set_master(port_dev, NULL);
1095
1096 err_set_master:
1097         team_port_disable_netpoll(port);
1098
1099 err_enable_netpoll:
1100         vlan_vids_del_by_dev(port_dev, dev);
1101
1102 err_vids_add:
1103         dev_close(port_dev);
1104
1105 err_dev_open:
1106         team_port_leave(team, port);
1107         team_port_set_orig_dev_addr(port);
1108
1109 err_port_enter:
1110         dev_set_mtu(port_dev, port->orig.mtu);
1111
1112 err_set_mtu:
1113         kfree(port);
1114
1115         return err;
1116 }
1117
1118 static void __team_port_change_port_removed(struct team_port *port);
1119
1120 static int team_port_del(struct team *team, struct net_device *port_dev)
1121 {
1122         struct net_device *dev = team->dev;
1123         struct team_port *port;
1124         char *portname = port_dev->name;
1125
1126         port = team_port_get_rtnl(port_dev);
1127         if (!port || !team_port_find(team, port)) {
1128                 netdev_err(dev, "Device %s does not act as a port of this team\n",
1129                            portname);
1130                 return -ENOENT;
1131         }
1132
1133         __team_option_inst_mark_removed_port(team, port);
1134         __team_options_change_check(team);
1135         __team_option_inst_del_port(team, port);
1136         __team_port_change_port_removed(port);
1137         team_port_disable(team, port);
1138         list_del_rcu(&port->list);
1139         netdev_rx_handler_unregister(port_dev);
1140         netdev_set_master(port_dev, NULL);
1141         team_port_disable_netpoll(port);
1142         vlan_vids_del_by_dev(port_dev, dev);
1143         dev_close(port_dev);
1144         team_port_leave(team, port);
1145         team_port_set_orig_dev_addr(port);
1146         dev_set_mtu(port_dev, port->orig.mtu);
1147         synchronize_rcu();
1148         kfree(port);
1149         netdev_info(dev, "Port device %s removed\n", portname);
1150         __team_compute_features(team);
1151
1152         return 0;
1153 }
1154
1155
1156 /*****************
1157  * Net device ops
1158  *****************/
1159
1160 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1161 {
1162         ctx->data.str_val = team->mode->kind;
1163         return 0;
1164 }
1165
1166 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1167 {
1168         return team_change_mode(team, ctx->data.str_val);
1169 }
1170
1171 static int team_port_en_option_get(struct team *team,
1172                                    struct team_gsetter_ctx *ctx)
1173 {
1174         struct team_port *port = ctx->info->port;
1175
1176         ctx->data.bool_val = team_port_enabled(port);
1177         return 0;
1178 }
1179
1180 static int team_port_en_option_set(struct team *team,
1181                                    struct team_gsetter_ctx *ctx)
1182 {
1183         struct team_port *port = ctx->info->port;
1184
1185         if (ctx->data.bool_val)
1186                 team_port_enable(team, port);
1187         else
1188                 team_port_disable(team, port);
1189         return 0;
1190 }
1191
1192 static int team_user_linkup_option_get(struct team *team,
1193                                        struct team_gsetter_ctx *ctx)
1194 {
1195         struct team_port *port = ctx->info->port;
1196
1197         ctx->data.bool_val = port->user.linkup;
1198         return 0;
1199 }
1200
1201 static int team_user_linkup_option_set(struct team *team,
1202                                        struct team_gsetter_ctx *ctx)
1203 {
1204         struct team_port *port = ctx->info->port;
1205
1206         port->user.linkup = ctx->data.bool_val;
1207         team_refresh_port_linkup(port);
1208         return 0;
1209 }
1210
1211 static int team_user_linkup_en_option_get(struct team *team,
1212                                           struct team_gsetter_ctx *ctx)
1213 {
1214         struct team_port *port = ctx->info->port;
1215
1216         ctx->data.bool_val = port->user.linkup_enabled;
1217         return 0;
1218 }
1219
1220 static int team_user_linkup_en_option_set(struct team *team,
1221                                           struct team_gsetter_ctx *ctx)
1222 {
1223         struct team_port *port = ctx->info->port;
1224
1225         port->user.linkup_enabled = ctx->data.bool_val;
1226         team_refresh_port_linkup(port);
1227         return 0;
1228 }
1229
1230 static int team_priority_option_get(struct team *team,
1231                                     struct team_gsetter_ctx *ctx)
1232 {
1233         struct team_port *port = ctx->info->port;
1234
1235         ctx->data.s32_val = port->priority;
1236         return 0;
1237 }
1238
1239 static int team_priority_option_set(struct team *team,
1240                                     struct team_gsetter_ctx *ctx)
1241 {
1242         struct team_port *port = ctx->info->port;
1243
1244         port->priority = ctx->data.s32_val;
1245         team_queue_override_port_refresh(team, port);
1246         return 0;
1247 }
1248
1249 static int team_queue_id_option_get(struct team *team,
1250                                     struct team_gsetter_ctx *ctx)
1251 {
1252         struct team_port *port = ctx->info->port;
1253
1254         ctx->data.u32_val = port->queue_id;
1255         return 0;
1256 }
1257
1258 static int team_queue_id_option_set(struct team *team,
1259                                     struct team_gsetter_ctx *ctx)
1260 {
1261         struct team_port *port = ctx->info->port;
1262
1263         if (port->queue_id == ctx->data.u32_val)
1264                 return 0;
1265         if (ctx->data.u32_val >= team->dev->real_num_tx_queues)
1266                 return -EINVAL;
1267         port->queue_id = ctx->data.u32_val;
1268         team_queue_override_port_refresh(team, port);
1269         return 0;
1270 }
1271
1272
1273 static const struct team_option team_options[] = {
1274         {
1275                 .name = "mode",
1276                 .type = TEAM_OPTION_TYPE_STRING,
1277                 .getter = team_mode_option_get,
1278                 .setter = team_mode_option_set,
1279         },
1280         {
1281                 .name = "enabled",
1282                 .type = TEAM_OPTION_TYPE_BOOL,
1283                 .per_port = true,
1284                 .getter = team_port_en_option_get,
1285                 .setter = team_port_en_option_set,
1286         },
1287         {
1288                 .name = "user_linkup",
1289                 .type = TEAM_OPTION_TYPE_BOOL,
1290                 .per_port = true,
1291                 .getter = team_user_linkup_option_get,
1292                 .setter = team_user_linkup_option_set,
1293         },
1294         {
1295                 .name = "user_linkup_enabled",
1296                 .type = TEAM_OPTION_TYPE_BOOL,
1297                 .per_port = true,
1298                 .getter = team_user_linkup_en_option_get,
1299                 .setter = team_user_linkup_en_option_set,
1300         },
1301         {
1302                 .name = "priority",
1303                 .type = TEAM_OPTION_TYPE_S32,
1304                 .per_port = true,
1305                 .getter = team_priority_option_get,
1306                 .setter = team_priority_option_set,
1307         },
1308         {
1309                 .name = "queue_id",
1310                 .type = TEAM_OPTION_TYPE_U32,
1311                 .per_port = true,
1312                 .getter = team_queue_id_option_get,
1313                 .setter = team_queue_id_option_set,
1314         },
1315 };
1316
1317 static struct lock_class_key team_netdev_xmit_lock_key;
1318 static struct lock_class_key team_netdev_addr_lock_key;
1319 static struct lock_class_key team_tx_busylock_key;
1320
1321 static void team_set_lockdep_class_one(struct net_device *dev,
1322                                        struct netdev_queue *txq,
1323                                        void *unused)
1324 {
1325         lockdep_set_class(&txq->_xmit_lock, &team_netdev_xmit_lock_key);
1326 }
1327
1328 static void team_set_lockdep_class(struct net_device *dev)
1329 {
1330         lockdep_set_class(&dev->addr_list_lock, &team_netdev_addr_lock_key);
1331         netdev_for_each_tx_queue(dev, team_set_lockdep_class_one, NULL);
1332         dev->qdisc_tx_busylock = &team_tx_busylock_key;
1333 }
1334
1335 static int team_init(struct net_device *dev)
1336 {
1337         struct team *team = netdev_priv(dev);
1338         int i;
1339         int err;
1340
1341         team->dev = dev;
1342         mutex_init(&team->lock);
1343         team_set_no_mode(team);
1344
1345         team->pcpu_stats = alloc_percpu(struct team_pcpu_stats);
1346         if (!team->pcpu_stats)
1347                 return -ENOMEM;
1348
1349         for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1350                 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1351         INIT_LIST_HEAD(&team->port_list);
1352         err = team_queue_override_init(team);
1353         if (err)
1354                 goto err_team_queue_override_init;
1355
1356         team_adjust_ops(team);
1357
1358         INIT_LIST_HEAD(&team->option_list);
1359         INIT_LIST_HEAD(&team->option_inst_list);
1360         err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1361         if (err)
1362                 goto err_options_register;
1363         netif_carrier_off(dev);
1364
1365         team_set_lockdep_class(dev);
1366
1367         return 0;
1368
1369 err_options_register:
1370         team_queue_override_fini(team);
1371 err_team_queue_override_init:
1372         free_percpu(team->pcpu_stats);
1373
1374         return err;
1375 }
1376
1377 static void team_uninit(struct net_device *dev)
1378 {
1379         struct team *team = netdev_priv(dev);
1380         struct team_port *port;
1381         struct team_port *tmp;
1382
1383         mutex_lock(&team->lock);
1384         list_for_each_entry_safe(port, tmp, &team->port_list, list)
1385                 team_port_del(team, port->dev);
1386
1387         __team_change_mode(team, NULL); /* cleanup */
1388         __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1389         team_queue_override_fini(team);
1390         mutex_unlock(&team->lock);
1391 }
1392
1393 static void team_destructor(struct net_device *dev)
1394 {
1395         struct team *team = netdev_priv(dev);
1396
1397         free_percpu(team->pcpu_stats);
1398         free_netdev(dev);
1399 }
1400
1401 static int team_open(struct net_device *dev)
1402 {
1403         netif_carrier_on(dev);
1404         return 0;
1405 }
1406
1407 static int team_close(struct net_device *dev)
1408 {
1409         netif_carrier_off(dev);
1410         return 0;
1411 }
1412
1413 /*
1414  * note: already called with rcu_read_lock
1415  */
1416 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1417 {
1418         struct team *team = netdev_priv(dev);
1419         bool tx_success;
1420         unsigned int len = skb->len;
1421
1422         tx_success = team_queue_override_transmit(team, skb);
1423         if (!tx_success)
1424                 tx_success = team->ops.transmit(team, skb);
1425         if (tx_success) {
1426                 struct team_pcpu_stats *pcpu_stats;
1427
1428                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1429                 u64_stats_update_begin(&pcpu_stats->syncp);
1430                 pcpu_stats->tx_packets++;
1431                 pcpu_stats->tx_bytes += len;
1432                 u64_stats_update_end(&pcpu_stats->syncp);
1433         } else {
1434                 this_cpu_inc(team->pcpu_stats->tx_dropped);
1435         }
1436
1437         return NETDEV_TX_OK;
1438 }
1439
1440 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb)
1441 {
1442         /*
1443          * This helper function exists to help dev_pick_tx get the correct
1444          * destination queue.  Using a helper function skips a call to
1445          * skb_tx_hash and will put the skbs in the queue we expect on their
1446          * way down to the team driver.
1447          */
1448         u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1449
1450         /*
1451          * Save the original txq to restore before passing to the driver
1452          */
1453         qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1454
1455         if (unlikely(txq >= dev->real_num_tx_queues)) {
1456                 do {
1457                         txq -= dev->real_num_tx_queues;
1458                 } while (txq >= dev->real_num_tx_queues);
1459         }
1460         return txq;
1461 }
1462
1463 static void team_change_rx_flags(struct net_device *dev, int change)
1464 {
1465         struct team *team = netdev_priv(dev);
1466         struct team_port *port;
1467         int inc;
1468
1469         rcu_read_lock();
1470         list_for_each_entry_rcu(port, &team->port_list, list) {
1471                 if (change & IFF_PROMISC) {
1472                         inc = dev->flags & IFF_PROMISC ? 1 : -1;
1473                         dev_set_promiscuity(port->dev, inc);
1474                 }
1475                 if (change & IFF_ALLMULTI) {
1476                         inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1477                         dev_set_allmulti(port->dev, inc);
1478                 }
1479         }
1480         rcu_read_unlock();
1481 }
1482
1483 static void team_set_rx_mode(struct net_device *dev)
1484 {
1485         struct team *team = netdev_priv(dev);
1486         struct team_port *port;
1487
1488         rcu_read_lock();
1489         list_for_each_entry_rcu(port, &team->port_list, list) {
1490                 dev_uc_sync(port->dev, dev);
1491                 dev_mc_sync(port->dev, dev);
1492         }
1493         rcu_read_unlock();
1494 }
1495
1496 static int team_set_mac_address(struct net_device *dev, void *p)
1497 {
1498         struct sockaddr *addr = p;
1499         struct team *team = netdev_priv(dev);
1500         struct team_port *port;
1501
1502         if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1503                 return -EADDRNOTAVAIL;
1504         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1505         dev->addr_assign_type &= ~NET_ADDR_RANDOM;
1506         rcu_read_lock();
1507         list_for_each_entry_rcu(port, &team->port_list, list)
1508                 if (team->ops.port_change_dev_addr)
1509                         team->ops.port_change_dev_addr(team, port);
1510         rcu_read_unlock();
1511         return 0;
1512 }
1513
1514 static int team_change_mtu(struct net_device *dev, int new_mtu)
1515 {
1516         struct team *team = netdev_priv(dev);
1517         struct team_port *port;
1518         int err;
1519
1520         /*
1521          * Alhough this is reader, it's guarded by team lock. It's not possible
1522          * to traverse list in reverse under rcu_read_lock
1523          */
1524         mutex_lock(&team->lock);
1525         list_for_each_entry(port, &team->port_list, list) {
1526                 err = dev_set_mtu(port->dev, new_mtu);
1527                 if (err) {
1528                         netdev_err(dev, "Device %s failed to change mtu",
1529                                    port->dev->name);
1530                         goto unwind;
1531                 }
1532         }
1533         mutex_unlock(&team->lock);
1534
1535         dev->mtu = new_mtu;
1536
1537         return 0;
1538
1539 unwind:
1540         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1541                 dev_set_mtu(port->dev, dev->mtu);
1542         mutex_unlock(&team->lock);
1543
1544         return err;
1545 }
1546
1547 static struct rtnl_link_stats64 *
1548 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1549 {
1550         struct team *team = netdev_priv(dev);
1551         struct team_pcpu_stats *p;
1552         u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1553         u32 rx_dropped = 0, tx_dropped = 0;
1554         unsigned int start;
1555         int i;
1556
1557         for_each_possible_cpu(i) {
1558                 p = per_cpu_ptr(team->pcpu_stats, i);
1559                 do {
1560                         start = u64_stats_fetch_begin_bh(&p->syncp);
1561                         rx_packets      = p->rx_packets;
1562                         rx_bytes        = p->rx_bytes;
1563                         rx_multicast    = p->rx_multicast;
1564                         tx_packets      = p->tx_packets;
1565                         tx_bytes        = p->tx_bytes;
1566                 } while (u64_stats_fetch_retry_bh(&p->syncp, start));
1567
1568                 stats->rx_packets       += rx_packets;
1569                 stats->rx_bytes         += rx_bytes;
1570                 stats->multicast        += rx_multicast;
1571                 stats->tx_packets       += tx_packets;
1572                 stats->tx_bytes         += tx_bytes;
1573                 /*
1574                  * rx_dropped & tx_dropped are u32, updated
1575                  * without syncp protection.
1576                  */
1577                 rx_dropped      += p->rx_dropped;
1578                 tx_dropped      += p->tx_dropped;
1579         }
1580         stats->rx_dropped       = rx_dropped;
1581         stats->tx_dropped       = tx_dropped;
1582         return stats;
1583 }
1584
1585 static int team_vlan_rx_add_vid(struct net_device *dev, uint16_t vid)
1586 {
1587         struct team *team = netdev_priv(dev);
1588         struct team_port *port;
1589         int err;
1590
1591         /*
1592          * Alhough this is reader, it's guarded by team lock. It's not possible
1593          * to traverse list in reverse under rcu_read_lock
1594          */
1595         mutex_lock(&team->lock);
1596         list_for_each_entry(port, &team->port_list, list) {
1597                 err = vlan_vid_add(port->dev, vid);
1598                 if (err)
1599                         goto unwind;
1600         }
1601         mutex_unlock(&team->lock);
1602
1603         return 0;
1604
1605 unwind:
1606         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1607                 vlan_vid_del(port->dev, vid);
1608         mutex_unlock(&team->lock);
1609
1610         return err;
1611 }
1612
1613 static int team_vlan_rx_kill_vid(struct net_device *dev, uint16_t vid)
1614 {
1615         struct team *team = netdev_priv(dev);
1616         struct team_port *port;
1617
1618         rcu_read_lock();
1619         list_for_each_entry_rcu(port, &team->port_list, list)
1620                 vlan_vid_del(port->dev, vid);
1621         rcu_read_unlock();
1622
1623         return 0;
1624 }
1625
1626 #ifdef CONFIG_NET_POLL_CONTROLLER
1627 static void team_poll_controller(struct net_device *dev)
1628 {
1629 }
1630
1631 static void __team_netpoll_cleanup(struct team *team)
1632 {
1633         struct team_port *port;
1634
1635         list_for_each_entry(port, &team->port_list, list)
1636                 team_port_disable_netpoll(port);
1637 }
1638
1639 static void team_netpoll_cleanup(struct net_device *dev)
1640 {
1641         struct team *team = netdev_priv(dev);
1642
1643         mutex_lock(&team->lock);
1644         __team_netpoll_cleanup(team);
1645         mutex_unlock(&team->lock);
1646 }
1647
1648 static int team_netpoll_setup(struct net_device *dev,
1649                               struct netpoll_info *npifo, gfp_t gfp)
1650 {
1651         struct team *team = netdev_priv(dev);
1652         struct team_port *port;
1653         int err = 0;
1654
1655         mutex_lock(&team->lock);
1656         list_for_each_entry(port, &team->port_list, list) {
1657                 err = team_port_enable_netpoll(team, port, gfp);
1658                 if (err) {
1659                         __team_netpoll_cleanup(team);
1660                         break;
1661                 }
1662         }
1663         mutex_unlock(&team->lock);
1664         return err;
1665 }
1666 #endif
1667
1668 static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
1669 {
1670         struct team *team = netdev_priv(dev);
1671         int err;
1672
1673         mutex_lock(&team->lock);
1674         err = team_port_add(team, port_dev);
1675         mutex_unlock(&team->lock);
1676         return err;
1677 }
1678
1679 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1680 {
1681         struct team *team = netdev_priv(dev);
1682         int err;
1683
1684         mutex_lock(&team->lock);
1685         err = team_port_del(team, port_dev);
1686         mutex_unlock(&team->lock);
1687         return err;
1688 }
1689
1690 static netdev_features_t team_fix_features(struct net_device *dev,
1691                                            netdev_features_t features)
1692 {
1693         struct team_port *port;
1694         struct team *team = netdev_priv(dev);
1695         netdev_features_t mask;
1696
1697         mask = features;
1698         features &= ~NETIF_F_ONE_FOR_ALL;
1699         features |= NETIF_F_ALL_FOR_ALL;
1700
1701         rcu_read_lock();
1702         list_for_each_entry_rcu(port, &team->port_list, list) {
1703                 features = netdev_increment_features(features,
1704                                                      port->dev->features,
1705                                                      mask);
1706         }
1707         rcu_read_unlock();
1708         return features;
1709 }
1710
1711 static int team_change_carrier(struct net_device *dev, bool new_carrier)
1712 {
1713         if (new_carrier)
1714                 netif_carrier_on(dev);
1715         else
1716                 netif_carrier_off(dev);
1717         return 0;
1718 }
1719
1720 static const struct net_device_ops team_netdev_ops = {
1721         .ndo_init               = team_init,
1722         .ndo_uninit             = team_uninit,
1723         .ndo_open               = team_open,
1724         .ndo_stop               = team_close,
1725         .ndo_start_xmit         = team_xmit,
1726         .ndo_select_queue       = team_select_queue,
1727         .ndo_change_rx_flags    = team_change_rx_flags,
1728         .ndo_set_rx_mode        = team_set_rx_mode,
1729         .ndo_set_mac_address    = team_set_mac_address,
1730         .ndo_change_mtu         = team_change_mtu,
1731         .ndo_get_stats64        = team_get_stats64,
1732         .ndo_vlan_rx_add_vid    = team_vlan_rx_add_vid,
1733         .ndo_vlan_rx_kill_vid   = team_vlan_rx_kill_vid,
1734 #ifdef CONFIG_NET_POLL_CONTROLLER
1735         .ndo_poll_controller    = team_poll_controller,
1736         .ndo_netpoll_setup      = team_netpoll_setup,
1737         .ndo_netpoll_cleanup    = team_netpoll_cleanup,
1738 #endif
1739         .ndo_add_slave          = team_add_slave,
1740         .ndo_del_slave          = team_del_slave,
1741         .ndo_fix_features       = team_fix_features,
1742         .ndo_change_carrier     = team_change_carrier,
1743 };
1744
1745 /***********************
1746  * ethtool interface
1747  ***********************/
1748
1749 static void team_ethtool_get_drvinfo(struct net_device *dev,
1750                                      struct ethtool_drvinfo *drvinfo)
1751 {
1752         strncpy(drvinfo->driver, DRV_NAME, 32);
1753         strncpy(drvinfo->version, UTS_RELEASE, 32);
1754 }
1755
1756 static const struct ethtool_ops team_ethtool_ops = {
1757         .get_drvinfo            = team_ethtool_get_drvinfo,
1758         .get_link               = ethtool_op_get_link,
1759 };
1760
1761 /***********************
1762  * rt netlink interface
1763  ***********************/
1764
1765 static void team_setup_by_port(struct net_device *dev,
1766                                struct net_device *port_dev)
1767 {
1768         dev->header_ops = port_dev->header_ops;
1769         dev->type = port_dev->type;
1770         dev->hard_header_len = port_dev->hard_header_len;
1771         dev->addr_len = port_dev->addr_len;
1772         dev->mtu = port_dev->mtu;
1773         memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
1774         memcpy(dev->dev_addr, port_dev->dev_addr, port_dev->addr_len);
1775         dev->addr_assign_type &= ~NET_ADDR_RANDOM;
1776 }
1777
1778 static int team_dev_type_check_change(struct net_device *dev,
1779                                       struct net_device *port_dev)
1780 {
1781         struct team *team = netdev_priv(dev);
1782         char *portname = port_dev->name;
1783         int err;
1784
1785         if (dev->type == port_dev->type)
1786                 return 0;
1787         if (!list_empty(&team->port_list)) {
1788                 netdev_err(dev, "Device %s is of different type\n", portname);
1789                 return -EBUSY;
1790         }
1791         err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
1792         err = notifier_to_errno(err);
1793         if (err) {
1794                 netdev_err(dev, "Refused to change device type\n");
1795                 return err;
1796         }
1797         dev_uc_flush(dev);
1798         dev_mc_flush(dev);
1799         team_setup_by_port(dev, port_dev);
1800         call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
1801         return 0;
1802 }
1803
1804 static void team_setup(struct net_device *dev)
1805 {
1806         ether_setup(dev);
1807
1808         dev->netdev_ops = &team_netdev_ops;
1809         dev->ethtool_ops = &team_ethtool_ops;
1810         dev->destructor = team_destructor;
1811         dev->tx_queue_len = 0;
1812         dev->flags |= IFF_MULTICAST;
1813         dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
1814
1815         /*
1816          * Indicate we support unicast address filtering. That way core won't
1817          * bring us to promisc mode in case a unicast addr is added.
1818          * Let this up to underlay drivers.
1819          */
1820         dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
1821
1822         dev->features |= NETIF_F_LLTX;
1823         dev->features |= NETIF_F_GRO;
1824         dev->hw_features = TEAM_VLAN_FEATURES |
1825                            NETIF_F_HW_VLAN_TX |
1826                            NETIF_F_HW_VLAN_RX |
1827                            NETIF_F_HW_VLAN_FILTER;
1828
1829         dev->hw_features &= ~(NETIF_F_ALL_CSUM & ~NETIF_F_HW_CSUM);
1830         dev->features |= dev->hw_features;
1831 }
1832
1833 static int team_newlink(struct net *src_net, struct net_device *dev,
1834                         struct nlattr *tb[], struct nlattr *data[])
1835 {
1836         int err;
1837
1838         if (tb[IFLA_ADDRESS] == NULL)
1839                 eth_hw_addr_random(dev);
1840
1841         err = register_netdevice(dev);
1842         if (err)
1843                 return err;
1844
1845         return 0;
1846 }
1847
1848 static int team_validate(struct nlattr *tb[], struct nlattr *data[])
1849 {
1850         if (tb[IFLA_ADDRESS]) {
1851                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
1852                         return -EINVAL;
1853                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
1854                         return -EADDRNOTAVAIL;
1855         }
1856         return 0;
1857 }
1858
1859 static unsigned int team_get_num_tx_queues(void)
1860 {
1861         return TEAM_DEFAULT_NUM_TX_QUEUES;
1862 }
1863
1864 static unsigned int team_get_num_rx_queues(void)
1865 {
1866         return TEAM_DEFAULT_NUM_RX_QUEUES;
1867 }
1868
1869 static struct rtnl_link_ops team_link_ops __read_mostly = {
1870         .kind                   = DRV_NAME,
1871         .priv_size              = sizeof(struct team),
1872         .setup                  = team_setup,
1873         .newlink                = team_newlink,
1874         .validate               = team_validate,
1875         .get_num_tx_queues      = team_get_num_tx_queues,
1876         .get_num_rx_queues      = team_get_num_rx_queues,
1877 };
1878
1879
1880 /***********************************
1881  * Generic netlink custom interface
1882  ***********************************/
1883
1884 static struct genl_family team_nl_family = {
1885         .id             = GENL_ID_GENERATE,
1886         .name           = TEAM_GENL_NAME,
1887         .version        = TEAM_GENL_VERSION,
1888         .maxattr        = TEAM_ATTR_MAX,
1889         .netnsok        = true,
1890 };
1891
1892 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
1893         [TEAM_ATTR_UNSPEC]                      = { .type = NLA_UNSPEC, },
1894         [TEAM_ATTR_TEAM_IFINDEX]                = { .type = NLA_U32 },
1895         [TEAM_ATTR_LIST_OPTION]                 = { .type = NLA_NESTED },
1896         [TEAM_ATTR_LIST_PORT]                   = { .type = NLA_NESTED },
1897 };
1898
1899 static const struct nla_policy
1900 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
1901         [TEAM_ATTR_OPTION_UNSPEC]               = { .type = NLA_UNSPEC, },
1902         [TEAM_ATTR_OPTION_NAME] = {
1903                 .type = NLA_STRING,
1904                 .len = TEAM_STRING_MAX_LEN,
1905         },
1906         [TEAM_ATTR_OPTION_CHANGED]              = { .type = NLA_FLAG },
1907         [TEAM_ATTR_OPTION_TYPE]                 = { .type = NLA_U8 },
1908         [TEAM_ATTR_OPTION_DATA]                 = { .type = NLA_BINARY },
1909 };
1910
1911 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
1912 {
1913         struct sk_buff *msg;
1914         void *hdr;
1915         int err;
1916
1917         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1918         if (!msg)
1919                 return -ENOMEM;
1920
1921         hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
1922                           &team_nl_family, 0, TEAM_CMD_NOOP);
1923         if (!hdr) {
1924                 err = -EMSGSIZE;
1925                 goto err_msg_put;
1926         }
1927
1928         genlmsg_end(msg, hdr);
1929
1930         return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
1931
1932 err_msg_put:
1933         nlmsg_free(msg);
1934
1935         return err;
1936 }
1937
1938 /*
1939  * Netlink cmd functions should be locked by following two functions.
1940  * Since dev gets held here, that ensures dev won't disappear in between.
1941  */
1942 static struct team *team_nl_team_get(struct genl_info *info)
1943 {
1944         struct net *net = genl_info_net(info);
1945         int ifindex;
1946         struct net_device *dev;
1947         struct team *team;
1948
1949         if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
1950                 return NULL;
1951
1952         ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
1953         dev = dev_get_by_index(net, ifindex);
1954         if (!dev || dev->netdev_ops != &team_netdev_ops) {
1955                 if (dev)
1956                         dev_put(dev);
1957                 return NULL;
1958         }
1959
1960         team = netdev_priv(dev);
1961         mutex_lock(&team->lock);
1962         return team;
1963 }
1964
1965 static void team_nl_team_put(struct team *team)
1966 {
1967         mutex_unlock(&team->lock);
1968         dev_put(team->dev);
1969 }
1970
1971 static int team_nl_send_generic(struct genl_info *info, struct team *team,
1972                                 int (*fill_func)(struct sk_buff *skb,
1973                                                  struct genl_info *info,
1974                                                  int flags, struct team *team))
1975 {
1976         struct sk_buff *skb;
1977         int err;
1978
1979         skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1980         if (!skb)
1981                 return -ENOMEM;
1982
1983         err = fill_func(skb, info, NLM_F_ACK, team);
1984         if (err < 0)
1985                 goto err_fill;
1986
1987         err = genlmsg_unicast(genl_info_net(info), skb, info->snd_portid);
1988         return err;
1989
1990 err_fill:
1991         nlmsg_free(skb);
1992         return err;
1993 }
1994
1995 typedef int team_nl_send_func_t(struct sk_buff *skb,
1996                                 struct team *team, u32 portid);
1997
1998 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
1999 {
2000         return genlmsg_unicast(dev_net(team->dev), skb, portid);
2001 }
2002
2003 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2004                                        struct team_option_inst *opt_inst)
2005 {
2006         struct nlattr *option_item;
2007         struct team_option *option = opt_inst->option;
2008         struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2009         struct team_gsetter_ctx ctx;
2010         int err;
2011
2012         ctx.info = opt_inst_info;
2013         err = team_option_get(team, opt_inst, &ctx);
2014         if (err)
2015                 return err;
2016
2017         option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
2018         if (!option_item)
2019                 return -EMSGSIZE;
2020
2021         if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2022                 goto nest_cancel;
2023         if (opt_inst_info->port &&
2024             nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2025                         opt_inst_info->port->dev->ifindex))
2026                 goto nest_cancel;
2027         if (opt_inst->option->array_size &&
2028             nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2029                         opt_inst_info->array_index))
2030                 goto nest_cancel;
2031
2032         switch (option->type) {
2033         case TEAM_OPTION_TYPE_U32:
2034                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2035                         goto nest_cancel;
2036                 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2037                         goto nest_cancel;
2038                 break;
2039         case TEAM_OPTION_TYPE_STRING:
2040                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2041                         goto nest_cancel;
2042                 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2043                                    ctx.data.str_val))
2044                         goto nest_cancel;
2045                 break;
2046         case TEAM_OPTION_TYPE_BINARY:
2047                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2048                         goto nest_cancel;
2049                 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2050                             ctx.data.bin_val.ptr))
2051                         goto nest_cancel;
2052                 break;
2053         case TEAM_OPTION_TYPE_BOOL:
2054                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2055                         goto nest_cancel;
2056                 if (ctx.data.bool_val &&
2057                     nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2058                         goto nest_cancel;
2059                 break;
2060         case TEAM_OPTION_TYPE_S32:
2061                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2062                         goto nest_cancel;
2063                 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2064                         goto nest_cancel;
2065                 break;
2066         default:
2067                 BUG();
2068         }
2069         if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2070                 goto nest_cancel;
2071         if (opt_inst->changed) {
2072                 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2073                         goto nest_cancel;
2074                 opt_inst->changed = false;
2075         }
2076         nla_nest_end(skb, option_item);
2077         return 0;
2078
2079 nest_cancel:
2080         nla_nest_cancel(skb, option_item);
2081         return -EMSGSIZE;
2082 }
2083
2084 static int __send_and_alloc_skb(struct sk_buff **pskb,
2085                                 struct team *team, u32 portid,
2086                                 team_nl_send_func_t *send_func)
2087 {
2088         int err;
2089
2090         if (*pskb) {
2091                 err = send_func(*pskb, team, portid);
2092                 if (err)
2093                         return err;
2094         }
2095         *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2096         if (!*pskb)
2097                 return -ENOMEM;
2098         return 0;
2099 }
2100
2101 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2102                                     int flags, team_nl_send_func_t *send_func,
2103                                     struct list_head *sel_opt_inst_list)
2104 {
2105         struct nlattr *option_list;
2106         struct nlmsghdr *nlh;
2107         void *hdr;
2108         struct team_option_inst *opt_inst;
2109         int err;
2110         struct sk_buff *skb = NULL;
2111         bool incomplete;
2112         int i;
2113
2114         opt_inst = list_first_entry(sel_opt_inst_list,
2115                                     struct team_option_inst, tmp_list);
2116
2117 start_again:
2118         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2119         if (err)
2120                 return err;
2121
2122         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2123                           TEAM_CMD_OPTIONS_GET);
2124         if (!hdr)
2125                 return -EMSGSIZE;
2126
2127         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2128                 goto nla_put_failure;
2129         option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2130         if (!option_list)
2131                 goto nla_put_failure;
2132
2133         i = 0;
2134         incomplete = false;
2135         list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2136                 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2137                 if (err) {
2138                         if (err == -EMSGSIZE) {
2139                                 if (!i)
2140                                         goto errout;
2141                                 incomplete = true;
2142                                 break;
2143                         }
2144                         goto errout;
2145                 }
2146                 i++;
2147         }
2148
2149         nla_nest_end(skb, option_list);
2150         genlmsg_end(skb, hdr);
2151         if (incomplete)
2152                 goto start_again;
2153
2154 send_done:
2155         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2156         if (!nlh) {
2157                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2158                 if (err)
2159                         goto errout;
2160                 goto send_done;
2161         }
2162
2163         return send_func(skb, team, portid);
2164
2165 nla_put_failure:
2166         err = -EMSGSIZE;
2167 errout:
2168         genlmsg_cancel(skb, hdr);
2169         nlmsg_free(skb);
2170         return err;
2171 }
2172
2173 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2174 {
2175         struct team *team;
2176         struct team_option_inst *opt_inst;
2177         int err;
2178         LIST_HEAD(sel_opt_inst_list);
2179
2180         team = team_nl_team_get(info);
2181         if (!team)
2182                 return -EINVAL;
2183
2184         list_for_each_entry(opt_inst, &team->option_inst_list, list)
2185                 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2186         err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2187                                        NLM_F_ACK, team_nl_send_unicast,
2188                                        &sel_opt_inst_list);
2189
2190         team_nl_team_put(team);
2191
2192         return err;
2193 }
2194
2195 static int team_nl_send_event_options_get(struct team *team,
2196                                           struct list_head *sel_opt_inst_list);
2197
2198 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2199 {
2200         struct team *team;
2201         int err = 0;
2202         int i;
2203         struct nlattr *nl_option;
2204         LIST_HEAD(opt_inst_list);
2205
2206         team = team_nl_team_get(info);
2207         if (!team)
2208                 return -EINVAL;
2209
2210         err = -EINVAL;
2211         if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2212                 err = -EINVAL;
2213                 goto team_put;
2214         }
2215
2216         nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2217                 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2218                 struct nlattr *attr;
2219                 struct nlattr *attr_data;
2220                 enum team_option_type opt_type;
2221                 int opt_port_ifindex = 0; /* != 0 for per-port options */
2222                 u32 opt_array_index = 0;
2223                 bool opt_is_array = false;
2224                 struct team_option_inst *opt_inst;
2225                 char *opt_name;
2226                 bool opt_found = false;
2227
2228                 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2229                         err = -EINVAL;
2230                         goto team_put;
2231                 }
2232                 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2233                                        nl_option, team_nl_option_policy);
2234                 if (err)
2235                         goto team_put;
2236                 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2237                     !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2238                         err = -EINVAL;
2239                         goto team_put;
2240                 }
2241                 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2242                 case NLA_U32:
2243                         opt_type = TEAM_OPTION_TYPE_U32;
2244                         break;
2245                 case NLA_STRING:
2246                         opt_type = TEAM_OPTION_TYPE_STRING;
2247                         break;
2248                 case NLA_BINARY:
2249                         opt_type = TEAM_OPTION_TYPE_BINARY;
2250                         break;
2251                 case NLA_FLAG:
2252                         opt_type = TEAM_OPTION_TYPE_BOOL;
2253                         break;
2254                 case NLA_S32:
2255                         opt_type = TEAM_OPTION_TYPE_S32;
2256                         break;
2257                 default:
2258                         goto team_put;
2259                 }
2260
2261                 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2262                 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2263                         err = -EINVAL;
2264                         goto team_put;
2265                 }
2266
2267                 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2268                 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2269                 if (attr)
2270                         opt_port_ifindex = nla_get_u32(attr);
2271
2272                 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2273                 if (attr) {
2274                         opt_is_array = true;
2275                         opt_array_index = nla_get_u32(attr);
2276                 }
2277
2278                 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2279                         struct team_option *option = opt_inst->option;
2280                         struct team_gsetter_ctx ctx;
2281                         struct team_option_inst_info *opt_inst_info;
2282                         int tmp_ifindex;
2283
2284                         opt_inst_info = &opt_inst->info;
2285                         tmp_ifindex = opt_inst_info->port ?
2286                                       opt_inst_info->port->dev->ifindex : 0;
2287                         if (option->type != opt_type ||
2288                             strcmp(option->name, opt_name) ||
2289                             tmp_ifindex != opt_port_ifindex ||
2290                             (option->array_size && !opt_is_array) ||
2291                             opt_inst_info->array_index != opt_array_index)
2292                                 continue;
2293                         opt_found = true;
2294                         ctx.info = opt_inst_info;
2295                         switch (opt_type) {
2296                         case TEAM_OPTION_TYPE_U32:
2297                                 ctx.data.u32_val = nla_get_u32(attr_data);
2298                                 break;
2299                         case TEAM_OPTION_TYPE_STRING:
2300                                 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2301                                         err = -EINVAL;
2302                                         goto team_put;
2303                                 }
2304                                 ctx.data.str_val = nla_data(attr_data);
2305                                 break;
2306                         case TEAM_OPTION_TYPE_BINARY:
2307                                 ctx.data.bin_val.len = nla_len(attr_data);
2308                                 ctx.data.bin_val.ptr = nla_data(attr_data);
2309                                 break;
2310                         case TEAM_OPTION_TYPE_BOOL:
2311                                 ctx.data.bool_val = attr_data ? true : false;
2312                                 break;
2313                         case TEAM_OPTION_TYPE_S32:
2314                                 ctx.data.s32_val = nla_get_s32(attr_data);
2315                                 break;
2316                         default:
2317                                 BUG();
2318                         }
2319                         err = team_option_set(team, opt_inst, &ctx);
2320                         if (err)
2321                                 goto team_put;
2322                         opt_inst->changed = true;
2323                         list_add(&opt_inst->tmp_list, &opt_inst_list);
2324                 }
2325                 if (!opt_found) {
2326                         err = -ENOENT;
2327                         goto team_put;
2328                 }
2329         }
2330
2331         err = team_nl_send_event_options_get(team, &opt_inst_list);
2332
2333 team_put:
2334         team_nl_team_put(team);
2335
2336         return err;
2337 }
2338
2339 static int team_nl_fill_port_list_get(struct sk_buff *skb,
2340                                       u32 portid, u32 seq, int flags,
2341                                       struct team *team,
2342                                       bool fillall)
2343 {
2344         struct nlattr *port_list;
2345         void *hdr;
2346         struct team_port *port;
2347
2348         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags,
2349                           TEAM_CMD_PORT_LIST_GET);
2350         if (!hdr)
2351                 return -EMSGSIZE;
2352
2353         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2354                 goto nla_put_failure;
2355         port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2356         if (!port_list)
2357                 goto nla_put_failure;
2358
2359         list_for_each_entry(port, &team->port_list, list) {
2360                 struct nlattr *port_item;
2361
2362                 /* Include only changed ports if fill all mode is not on */
2363                 if (!fillall && !port->changed)
2364                         continue;
2365                 port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2366                 if (!port_item)
2367                         goto nla_put_failure;
2368                 if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2369                         goto nla_put_failure;
2370                 if (port->changed) {
2371                         if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2372                                 goto nla_put_failure;
2373                         port->changed = false;
2374                 }
2375                 if ((port->removed &&
2376                      nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2377                     (port->state.linkup &&
2378                      nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2379                     nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2380                     nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2381                         goto nla_put_failure;
2382                 nla_nest_end(skb, port_item);
2383         }
2384
2385         nla_nest_end(skb, port_list);
2386         return genlmsg_end(skb, hdr);
2387
2388 nla_put_failure:
2389         genlmsg_cancel(skb, hdr);
2390         return -EMSGSIZE;
2391 }
2392
2393 static int team_nl_fill_port_list_get_all(struct sk_buff *skb,
2394                                           struct genl_info *info, int flags,
2395                                           struct team *team)
2396 {
2397         return team_nl_fill_port_list_get(skb, info->snd_portid,
2398                                           info->snd_seq, NLM_F_ACK,
2399                                           team, true);
2400 }
2401
2402 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2403                                      struct genl_info *info)
2404 {
2405         struct team *team;
2406         int err;
2407
2408         team = team_nl_team_get(info);
2409         if (!team)
2410                 return -EINVAL;
2411
2412         err = team_nl_send_generic(info, team, team_nl_fill_port_list_get_all);
2413
2414         team_nl_team_put(team);
2415
2416         return err;
2417 }
2418
2419 static struct genl_ops team_nl_ops[] = {
2420         {
2421                 .cmd = TEAM_CMD_NOOP,
2422                 .doit = team_nl_cmd_noop,
2423                 .policy = team_nl_policy,
2424         },
2425         {
2426                 .cmd = TEAM_CMD_OPTIONS_SET,
2427                 .doit = team_nl_cmd_options_set,
2428                 .policy = team_nl_policy,
2429                 .flags = GENL_ADMIN_PERM,
2430         },
2431         {
2432                 .cmd = TEAM_CMD_OPTIONS_GET,
2433                 .doit = team_nl_cmd_options_get,
2434                 .policy = team_nl_policy,
2435                 .flags = GENL_ADMIN_PERM,
2436         },
2437         {
2438                 .cmd = TEAM_CMD_PORT_LIST_GET,
2439                 .doit = team_nl_cmd_port_list_get,
2440                 .policy = team_nl_policy,
2441                 .flags = GENL_ADMIN_PERM,
2442         },
2443 };
2444
2445 static struct genl_multicast_group team_change_event_mcgrp = {
2446         .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME,
2447 };
2448
2449 static int team_nl_send_multicast(struct sk_buff *skb,
2450                                   struct team *team, u32 portid)
2451 {
2452         return genlmsg_multicast_netns(dev_net(team->dev), skb, 0,
2453                                        team_change_event_mcgrp.id, GFP_KERNEL);
2454 }
2455
2456 static int team_nl_send_event_options_get(struct team *team,
2457                                           struct list_head *sel_opt_inst_list)
2458 {
2459         return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2460                                         sel_opt_inst_list);
2461 }
2462
2463 static int team_nl_send_event_port_list_get(struct team *team)
2464 {
2465         struct sk_buff *skb;
2466         int err;
2467         struct net *net = dev_net(team->dev);
2468
2469         skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2470         if (!skb)
2471                 return -ENOMEM;
2472
2473         err = team_nl_fill_port_list_get(skb, 0, 0, 0, team, false);
2474         if (err < 0)
2475                 goto err_fill;
2476
2477         err = genlmsg_multicast_netns(net, skb, 0, team_change_event_mcgrp.id,
2478                                       GFP_KERNEL);
2479         return err;
2480
2481 err_fill:
2482         nlmsg_free(skb);
2483         return err;
2484 }
2485
2486 static int team_nl_init(void)
2487 {
2488         int err;
2489
2490         err = genl_register_family_with_ops(&team_nl_family, team_nl_ops,
2491                                             ARRAY_SIZE(team_nl_ops));
2492         if (err)
2493                 return err;
2494
2495         err = genl_register_mc_group(&team_nl_family, &team_change_event_mcgrp);
2496         if (err)
2497                 goto err_change_event_grp_reg;
2498
2499         return 0;
2500
2501 err_change_event_grp_reg:
2502         genl_unregister_family(&team_nl_family);
2503
2504         return err;
2505 }
2506
2507 static void team_nl_fini(void)
2508 {
2509         genl_unregister_family(&team_nl_family);
2510 }
2511
2512
2513 /******************
2514  * Change checkers
2515  ******************/
2516
2517 static void __team_options_change_check(struct team *team)
2518 {
2519         int err;
2520         struct team_option_inst *opt_inst;
2521         LIST_HEAD(sel_opt_inst_list);
2522
2523         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2524                 if (opt_inst->changed)
2525                         list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2526         }
2527         err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2528         if (err && err != -ESRCH)
2529                 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2530                             err);
2531 }
2532
2533 /* rtnl lock is held */
2534
2535 static void __team_port_change_send(struct team_port *port, bool linkup)
2536 {
2537         int err;
2538
2539         port->changed = true;
2540         port->state.linkup = linkup;
2541         team_refresh_port_linkup(port);
2542         if (linkup) {
2543                 struct ethtool_cmd ecmd;
2544
2545                 err = __ethtool_get_settings(port->dev, &ecmd);
2546                 if (!err) {
2547                         port->state.speed = ethtool_cmd_speed(&ecmd);
2548                         port->state.duplex = ecmd.duplex;
2549                         goto send_event;
2550                 }
2551         }
2552         port->state.speed = 0;
2553         port->state.duplex = 0;
2554
2555 send_event:
2556         err = team_nl_send_event_port_list_get(port->team);
2557         if (err && err != -ESRCH)
2558                 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2559                             port->dev->name, err);
2560
2561 }
2562
2563 static void __team_port_change_check(struct team_port *port, bool linkup)
2564 {
2565         if (port->state.linkup != linkup)
2566                 __team_port_change_send(port, linkup);
2567 }
2568
2569 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2570 {
2571         __team_port_change_send(port, linkup);
2572 }
2573
2574 static void __team_port_change_port_removed(struct team_port *port)
2575 {
2576         port->removed = true;
2577         __team_port_change_send(port, false);
2578 }
2579
2580 static void team_port_change_check(struct team_port *port, bool linkup)
2581 {
2582         struct team *team = port->team;
2583
2584         mutex_lock(&team->lock);
2585         __team_port_change_check(port, linkup);
2586         mutex_unlock(&team->lock);
2587 }
2588
2589
2590 /************************************
2591  * Net device notifier event handler
2592  ************************************/
2593
2594 static int team_device_event(struct notifier_block *unused,
2595                              unsigned long event, void *ptr)
2596 {
2597         struct net_device *dev = (struct net_device *) ptr;
2598         struct team_port *port;
2599
2600         port = team_port_get_rtnl(dev);
2601         if (!port)
2602                 return NOTIFY_DONE;
2603
2604         switch (event) {
2605         case NETDEV_UP:
2606                 if (netif_carrier_ok(dev))
2607                         team_port_change_check(port, true);
2608         case NETDEV_DOWN:
2609                 team_port_change_check(port, false);
2610         case NETDEV_CHANGE:
2611                 if (netif_running(port->dev))
2612                         team_port_change_check(port,
2613                                                !!netif_carrier_ok(port->dev));
2614                 break;
2615         case NETDEV_UNREGISTER:
2616                 team_del_slave(port->team->dev, dev);
2617                 break;
2618         case NETDEV_FEAT_CHANGE:
2619                 team_compute_features(port->team);
2620                 break;
2621         case NETDEV_CHANGEMTU:
2622                 /* Forbid to change mtu of underlaying device */
2623                 return NOTIFY_BAD;
2624         case NETDEV_PRE_TYPE_CHANGE:
2625                 /* Forbid to change type of underlaying device */
2626                 return NOTIFY_BAD;
2627         }
2628         return NOTIFY_DONE;
2629 }
2630
2631 static struct notifier_block team_notifier_block __read_mostly = {
2632         .notifier_call = team_device_event,
2633 };
2634
2635
2636 /***********************
2637  * Module init and exit
2638  ***********************/
2639
2640 static int __init team_module_init(void)
2641 {
2642         int err;
2643
2644         register_netdevice_notifier(&team_notifier_block);
2645
2646         err = rtnl_link_register(&team_link_ops);
2647         if (err)
2648                 goto err_rtnl_reg;
2649
2650         err = team_nl_init();
2651         if (err)
2652                 goto err_nl_init;
2653
2654         return 0;
2655
2656 err_nl_init:
2657         rtnl_link_unregister(&team_link_ops);
2658
2659 err_rtnl_reg:
2660         unregister_netdevice_notifier(&team_notifier_block);
2661
2662         return err;
2663 }
2664
2665 static void __exit team_module_exit(void)
2666 {
2667         team_nl_fini();
2668         rtnl_link_unregister(&team_link_ops);
2669         unregister_netdevice_notifier(&team_notifier_block);
2670 }
2671
2672 module_init(team_module_init);
2673 module_exit(team_module_exit);
2674
2675 MODULE_LICENSE("GPL v2");
2676 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
2677 MODULE_DESCRIPTION("Ethernet team device driver");
2678 MODULE_ALIAS_RTNL_LINK(DRV_NAME);