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         return 0;
1404 }
1405
1406 static int team_close(struct net_device *dev)
1407 {
1408         return 0;
1409 }
1410
1411 /*
1412  * note: already called with rcu_read_lock
1413  */
1414 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1415 {
1416         struct team *team = netdev_priv(dev);
1417         bool tx_success;
1418         unsigned int len = skb->len;
1419
1420         tx_success = team_queue_override_transmit(team, skb);
1421         if (!tx_success)
1422                 tx_success = team->ops.transmit(team, skb);
1423         if (tx_success) {
1424                 struct team_pcpu_stats *pcpu_stats;
1425
1426                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1427                 u64_stats_update_begin(&pcpu_stats->syncp);
1428                 pcpu_stats->tx_packets++;
1429                 pcpu_stats->tx_bytes += len;
1430                 u64_stats_update_end(&pcpu_stats->syncp);
1431         } else {
1432                 this_cpu_inc(team->pcpu_stats->tx_dropped);
1433         }
1434
1435         return NETDEV_TX_OK;
1436 }
1437
1438 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb)
1439 {
1440         /*
1441          * This helper function exists to help dev_pick_tx get the correct
1442          * destination queue.  Using a helper function skips a call to
1443          * skb_tx_hash and will put the skbs in the queue we expect on their
1444          * way down to the team driver.
1445          */
1446         u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1447
1448         /*
1449          * Save the original txq to restore before passing to the driver
1450          */
1451         qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1452
1453         if (unlikely(txq >= dev->real_num_tx_queues)) {
1454                 do {
1455                         txq -= dev->real_num_tx_queues;
1456                 } while (txq >= dev->real_num_tx_queues);
1457         }
1458         return txq;
1459 }
1460
1461 static void team_change_rx_flags(struct net_device *dev, int change)
1462 {
1463         struct team *team = netdev_priv(dev);
1464         struct team_port *port;
1465         int inc;
1466
1467         rcu_read_lock();
1468         list_for_each_entry_rcu(port, &team->port_list, list) {
1469                 if (change & IFF_PROMISC) {
1470                         inc = dev->flags & IFF_PROMISC ? 1 : -1;
1471                         dev_set_promiscuity(port->dev, inc);
1472                 }
1473                 if (change & IFF_ALLMULTI) {
1474                         inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1475                         dev_set_allmulti(port->dev, inc);
1476                 }
1477         }
1478         rcu_read_unlock();
1479 }
1480
1481 static void team_set_rx_mode(struct net_device *dev)
1482 {
1483         struct team *team = netdev_priv(dev);
1484         struct team_port *port;
1485
1486         rcu_read_lock();
1487         list_for_each_entry_rcu(port, &team->port_list, list) {
1488                 dev_uc_sync(port->dev, dev);
1489                 dev_mc_sync(port->dev, dev);
1490         }
1491         rcu_read_unlock();
1492 }
1493
1494 static int team_set_mac_address(struct net_device *dev, void *p)
1495 {
1496         struct sockaddr *addr = p;
1497         struct team *team = netdev_priv(dev);
1498         struct team_port *port;
1499
1500         if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1501                 return -EADDRNOTAVAIL;
1502         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1503         dev->addr_assign_type &= ~NET_ADDR_RANDOM;
1504         rcu_read_lock();
1505         list_for_each_entry_rcu(port, &team->port_list, list)
1506                 if (team->ops.port_change_dev_addr)
1507                         team->ops.port_change_dev_addr(team, port);
1508         rcu_read_unlock();
1509         return 0;
1510 }
1511
1512 static int team_change_mtu(struct net_device *dev, int new_mtu)
1513 {
1514         struct team *team = netdev_priv(dev);
1515         struct team_port *port;
1516         int err;
1517
1518         /*
1519          * Alhough this is reader, it's guarded by team lock. It's not possible
1520          * to traverse list in reverse under rcu_read_lock
1521          */
1522         mutex_lock(&team->lock);
1523         list_for_each_entry(port, &team->port_list, list) {
1524                 err = dev_set_mtu(port->dev, new_mtu);
1525                 if (err) {
1526                         netdev_err(dev, "Device %s failed to change mtu",
1527                                    port->dev->name);
1528                         goto unwind;
1529                 }
1530         }
1531         mutex_unlock(&team->lock);
1532
1533         dev->mtu = new_mtu;
1534
1535         return 0;
1536
1537 unwind:
1538         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1539                 dev_set_mtu(port->dev, dev->mtu);
1540         mutex_unlock(&team->lock);
1541
1542         return err;
1543 }
1544
1545 static struct rtnl_link_stats64 *
1546 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1547 {
1548         struct team *team = netdev_priv(dev);
1549         struct team_pcpu_stats *p;
1550         u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1551         u32 rx_dropped = 0, tx_dropped = 0;
1552         unsigned int start;
1553         int i;
1554
1555         for_each_possible_cpu(i) {
1556                 p = per_cpu_ptr(team->pcpu_stats, i);
1557                 do {
1558                         start = u64_stats_fetch_begin_bh(&p->syncp);
1559                         rx_packets      = p->rx_packets;
1560                         rx_bytes        = p->rx_bytes;
1561                         rx_multicast    = p->rx_multicast;
1562                         tx_packets      = p->tx_packets;
1563                         tx_bytes        = p->tx_bytes;
1564                 } while (u64_stats_fetch_retry_bh(&p->syncp, start));
1565
1566                 stats->rx_packets       += rx_packets;
1567                 stats->rx_bytes         += rx_bytes;
1568                 stats->multicast        += rx_multicast;
1569                 stats->tx_packets       += tx_packets;
1570                 stats->tx_bytes         += tx_bytes;
1571                 /*
1572                  * rx_dropped & tx_dropped are u32, updated
1573                  * without syncp protection.
1574                  */
1575                 rx_dropped      += p->rx_dropped;
1576                 tx_dropped      += p->tx_dropped;
1577         }
1578         stats->rx_dropped       = rx_dropped;
1579         stats->tx_dropped       = tx_dropped;
1580         return stats;
1581 }
1582
1583 static int team_vlan_rx_add_vid(struct net_device *dev, uint16_t vid)
1584 {
1585         struct team *team = netdev_priv(dev);
1586         struct team_port *port;
1587         int err;
1588
1589         /*
1590          * Alhough this is reader, it's guarded by team lock. It's not possible
1591          * to traverse list in reverse under rcu_read_lock
1592          */
1593         mutex_lock(&team->lock);
1594         list_for_each_entry(port, &team->port_list, list) {
1595                 err = vlan_vid_add(port->dev, vid);
1596                 if (err)
1597                         goto unwind;
1598         }
1599         mutex_unlock(&team->lock);
1600
1601         return 0;
1602
1603 unwind:
1604         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1605                 vlan_vid_del(port->dev, vid);
1606         mutex_unlock(&team->lock);
1607
1608         return err;
1609 }
1610
1611 static int team_vlan_rx_kill_vid(struct net_device *dev, uint16_t vid)
1612 {
1613         struct team *team = netdev_priv(dev);
1614         struct team_port *port;
1615
1616         rcu_read_lock();
1617         list_for_each_entry_rcu(port, &team->port_list, list)
1618                 vlan_vid_del(port->dev, vid);
1619         rcu_read_unlock();
1620
1621         return 0;
1622 }
1623
1624 #ifdef CONFIG_NET_POLL_CONTROLLER
1625 static void team_poll_controller(struct net_device *dev)
1626 {
1627 }
1628
1629 static void __team_netpoll_cleanup(struct team *team)
1630 {
1631         struct team_port *port;
1632
1633         list_for_each_entry(port, &team->port_list, list)
1634                 team_port_disable_netpoll(port);
1635 }
1636
1637 static void team_netpoll_cleanup(struct net_device *dev)
1638 {
1639         struct team *team = netdev_priv(dev);
1640
1641         mutex_lock(&team->lock);
1642         __team_netpoll_cleanup(team);
1643         mutex_unlock(&team->lock);
1644 }
1645
1646 static int team_netpoll_setup(struct net_device *dev,
1647                               struct netpoll_info *npifo, gfp_t gfp)
1648 {
1649         struct team *team = netdev_priv(dev);
1650         struct team_port *port;
1651         int err = 0;
1652
1653         mutex_lock(&team->lock);
1654         list_for_each_entry(port, &team->port_list, list) {
1655                 err = team_port_enable_netpoll(team, port, gfp);
1656                 if (err) {
1657                         __team_netpoll_cleanup(team);
1658                         break;
1659                 }
1660         }
1661         mutex_unlock(&team->lock);
1662         return err;
1663 }
1664 #endif
1665
1666 static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
1667 {
1668         struct team *team = netdev_priv(dev);
1669         int err;
1670
1671         mutex_lock(&team->lock);
1672         err = team_port_add(team, port_dev);
1673         mutex_unlock(&team->lock);
1674         return err;
1675 }
1676
1677 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1678 {
1679         struct team *team = netdev_priv(dev);
1680         int err;
1681
1682         mutex_lock(&team->lock);
1683         err = team_port_del(team, port_dev);
1684         mutex_unlock(&team->lock);
1685         return err;
1686 }
1687
1688 static netdev_features_t team_fix_features(struct net_device *dev,
1689                                            netdev_features_t features)
1690 {
1691         struct team_port *port;
1692         struct team *team = netdev_priv(dev);
1693         netdev_features_t mask;
1694
1695         mask = features;
1696         features &= ~NETIF_F_ONE_FOR_ALL;
1697         features |= NETIF_F_ALL_FOR_ALL;
1698
1699         rcu_read_lock();
1700         list_for_each_entry_rcu(port, &team->port_list, list) {
1701                 features = netdev_increment_features(features,
1702                                                      port->dev->features,
1703                                                      mask);
1704         }
1705         rcu_read_unlock();
1706         return features;
1707 }
1708
1709 static int team_change_carrier(struct net_device *dev, bool new_carrier)
1710 {
1711         if (new_carrier)
1712                 netif_carrier_on(dev);
1713         else
1714                 netif_carrier_off(dev);
1715         return 0;
1716 }
1717
1718 static const struct net_device_ops team_netdev_ops = {
1719         .ndo_init               = team_init,
1720         .ndo_uninit             = team_uninit,
1721         .ndo_open               = team_open,
1722         .ndo_stop               = team_close,
1723         .ndo_start_xmit         = team_xmit,
1724         .ndo_select_queue       = team_select_queue,
1725         .ndo_change_rx_flags    = team_change_rx_flags,
1726         .ndo_set_rx_mode        = team_set_rx_mode,
1727         .ndo_set_mac_address    = team_set_mac_address,
1728         .ndo_change_mtu         = team_change_mtu,
1729         .ndo_get_stats64        = team_get_stats64,
1730         .ndo_vlan_rx_add_vid    = team_vlan_rx_add_vid,
1731         .ndo_vlan_rx_kill_vid   = team_vlan_rx_kill_vid,
1732 #ifdef CONFIG_NET_POLL_CONTROLLER
1733         .ndo_poll_controller    = team_poll_controller,
1734         .ndo_netpoll_setup      = team_netpoll_setup,
1735         .ndo_netpoll_cleanup    = team_netpoll_cleanup,
1736 #endif
1737         .ndo_add_slave          = team_add_slave,
1738         .ndo_del_slave          = team_del_slave,
1739         .ndo_fix_features       = team_fix_features,
1740         .ndo_change_carrier     = team_change_carrier,
1741 };
1742
1743 /***********************
1744  * ethtool interface
1745  ***********************/
1746
1747 static void team_ethtool_get_drvinfo(struct net_device *dev,
1748                                      struct ethtool_drvinfo *drvinfo)
1749 {
1750         strncpy(drvinfo->driver, DRV_NAME, 32);
1751         strncpy(drvinfo->version, UTS_RELEASE, 32);
1752 }
1753
1754 static const struct ethtool_ops team_ethtool_ops = {
1755         .get_drvinfo            = team_ethtool_get_drvinfo,
1756         .get_link               = ethtool_op_get_link,
1757 };
1758
1759 /***********************
1760  * rt netlink interface
1761  ***********************/
1762
1763 static void team_setup_by_port(struct net_device *dev,
1764                                struct net_device *port_dev)
1765 {
1766         dev->header_ops = port_dev->header_ops;
1767         dev->type = port_dev->type;
1768         dev->hard_header_len = port_dev->hard_header_len;
1769         dev->addr_len = port_dev->addr_len;
1770         dev->mtu = port_dev->mtu;
1771         memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
1772         memcpy(dev->dev_addr, port_dev->dev_addr, port_dev->addr_len);
1773         dev->addr_assign_type &= ~NET_ADDR_RANDOM;
1774 }
1775
1776 static int team_dev_type_check_change(struct net_device *dev,
1777                                       struct net_device *port_dev)
1778 {
1779         struct team *team = netdev_priv(dev);
1780         char *portname = port_dev->name;
1781         int err;
1782
1783         if (dev->type == port_dev->type)
1784                 return 0;
1785         if (!list_empty(&team->port_list)) {
1786                 netdev_err(dev, "Device %s is of different type\n", portname);
1787                 return -EBUSY;
1788         }
1789         err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
1790         err = notifier_to_errno(err);
1791         if (err) {
1792                 netdev_err(dev, "Refused to change device type\n");
1793                 return err;
1794         }
1795         dev_uc_flush(dev);
1796         dev_mc_flush(dev);
1797         team_setup_by_port(dev, port_dev);
1798         call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
1799         return 0;
1800 }
1801
1802 static void team_setup(struct net_device *dev)
1803 {
1804         ether_setup(dev);
1805
1806         dev->netdev_ops = &team_netdev_ops;
1807         dev->ethtool_ops = &team_ethtool_ops;
1808         dev->destructor = team_destructor;
1809         dev->tx_queue_len = 0;
1810         dev->flags |= IFF_MULTICAST;
1811         dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
1812
1813         /*
1814          * Indicate we support unicast address filtering. That way core won't
1815          * bring us to promisc mode in case a unicast addr is added.
1816          * Let this up to underlay drivers.
1817          */
1818         dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
1819
1820         dev->features |= NETIF_F_LLTX;
1821         dev->features |= NETIF_F_GRO;
1822         dev->hw_features = TEAM_VLAN_FEATURES |
1823                            NETIF_F_HW_VLAN_TX |
1824                            NETIF_F_HW_VLAN_RX |
1825                            NETIF_F_HW_VLAN_FILTER;
1826
1827         dev->hw_features &= ~(NETIF_F_ALL_CSUM & ~NETIF_F_HW_CSUM);
1828         dev->features |= dev->hw_features;
1829 }
1830
1831 static int team_newlink(struct net *src_net, struct net_device *dev,
1832                         struct nlattr *tb[], struct nlattr *data[])
1833 {
1834         int err;
1835
1836         if (tb[IFLA_ADDRESS] == NULL)
1837                 eth_hw_addr_random(dev);
1838
1839         err = register_netdevice(dev);
1840         if (err)
1841                 return err;
1842
1843         return 0;
1844 }
1845
1846 static int team_validate(struct nlattr *tb[], struct nlattr *data[])
1847 {
1848         if (tb[IFLA_ADDRESS]) {
1849                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
1850                         return -EINVAL;
1851                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
1852                         return -EADDRNOTAVAIL;
1853         }
1854         return 0;
1855 }
1856
1857 static unsigned int team_get_num_tx_queues(void)
1858 {
1859         return TEAM_DEFAULT_NUM_TX_QUEUES;
1860 }
1861
1862 static unsigned int team_get_num_rx_queues(void)
1863 {
1864         return TEAM_DEFAULT_NUM_RX_QUEUES;
1865 }
1866
1867 static struct rtnl_link_ops team_link_ops __read_mostly = {
1868         .kind                   = DRV_NAME,
1869         .priv_size              = sizeof(struct team),
1870         .setup                  = team_setup,
1871         .newlink                = team_newlink,
1872         .validate               = team_validate,
1873         .get_num_tx_queues      = team_get_num_tx_queues,
1874         .get_num_rx_queues      = team_get_num_rx_queues,
1875 };
1876
1877
1878 /***********************************
1879  * Generic netlink custom interface
1880  ***********************************/
1881
1882 static struct genl_family team_nl_family = {
1883         .id             = GENL_ID_GENERATE,
1884         .name           = TEAM_GENL_NAME,
1885         .version        = TEAM_GENL_VERSION,
1886         .maxattr        = TEAM_ATTR_MAX,
1887         .netnsok        = true,
1888 };
1889
1890 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
1891         [TEAM_ATTR_UNSPEC]                      = { .type = NLA_UNSPEC, },
1892         [TEAM_ATTR_TEAM_IFINDEX]                = { .type = NLA_U32 },
1893         [TEAM_ATTR_LIST_OPTION]                 = { .type = NLA_NESTED },
1894         [TEAM_ATTR_LIST_PORT]                   = { .type = NLA_NESTED },
1895 };
1896
1897 static const struct nla_policy
1898 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
1899         [TEAM_ATTR_OPTION_UNSPEC]               = { .type = NLA_UNSPEC, },
1900         [TEAM_ATTR_OPTION_NAME] = {
1901                 .type = NLA_STRING,
1902                 .len = TEAM_STRING_MAX_LEN,
1903         },
1904         [TEAM_ATTR_OPTION_CHANGED]              = { .type = NLA_FLAG },
1905         [TEAM_ATTR_OPTION_TYPE]                 = { .type = NLA_U8 },
1906         [TEAM_ATTR_OPTION_DATA]                 = { .type = NLA_BINARY },
1907 };
1908
1909 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
1910 {
1911         struct sk_buff *msg;
1912         void *hdr;
1913         int err;
1914
1915         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1916         if (!msg)
1917                 return -ENOMEM;
1918
1919         hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
1920                           &team_nl_family, 0, TEAM_CMD_NOOP);
1921         if (!hdr) {
1922                 err = -EMSGSIZE;
1923                 goto err_msg_put;
1924         }
1925
1926         genlmsg_end(msg, hdr);
1927
1928         return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
1929
1930 err_msg_put:
1931         nlmsg_free(msg);
1932
1933         return err;
1934 }
1935
1936 /*
1937  * Netlink cmd functions should be locked by following two functions.
1938  * Since dev gets held here, that ensures dev won't disappear in between.
1939  */
1940 static struct team *team_nl_team_get(struct genl_info *info)
1941 {
1942         struct net *net = genl_info_net(info);
1943         int ifindex;
1944         struct net_device *dev;
1945         struct team *team;
1946
1947         if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
1948                 return NULL;
1949
1950         ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
1951         dev = dev_get_by_index(net, ifindex);
1952         if (!dev || dev->netdev_ops != &team_netdev_ops) {
1953                 if (dev)
1954                         dev_put(dev);
1955                 return NULL;
1956         }
1957
1958         team = netdev_priv(dev);
1959         mutex_lock(&team->lock);
1960         return team;
1961 }
1962
1963 static void team_nl_team_put(struct team *team)
1964 {
1965         mutex_unlock(&team->lock);
1966         dev_put(team->dev);
1967 }
1968
1969 static int team_nl_send_generic(struct genl_info *info, struct team *team,
1970                                 int (*fill_func)(struct sk_buff *skb,
1971                                                  struct genl_info *info,
1972                                                  int flags, struct team *team))
1973 {
1974         struct sk_buff *skb;
1975         int err;
1976
1977         skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1978         if (!skb)
1979                 return -ENOMEM;
1980
1981         err = fill_func(skb, info, NLM_F_ACK, team);
1982         if (err < 0)
1983                 goto err_fill;
1984
1985         err = genlmsg_unicast(genl_info_net(info), skb, info->snd_portid);
1986         return err;
1987
1988 err_fill:
1989         nlmsg_free(skb);
1990         return err;
1991 }
1992
1993 typedef int team_nl_send_func_t(struct sk_buff *skb,
1994                                 struct team *team, u32 portid);
1995
1996 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
1997 {
1998         return genlmsg_unicast(dev_net(team->dev), skb, portid);
1999 }
2000
2001 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2002                                        struct team_option_inst *opt_inst)
2003 {
2004         struct nlattr *option_item;
2005         struct team_option *option = opt_inst->option;
2006         struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2007         struct team_gsetter_ctx ctx;
2008         int err;
2009
2010         ctx.info = opt_inst_info;
2011         err = team_option_get(team, opt_inst, &ctx);
2012         if (err)
2013                 return err;
2014
2015         option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
2016         if (!option_item)
2017                 return -EMSGSIZE;
2018
2019         if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2020                 goto nest_cancel;
2021         if (opt_inst_info->port &&
2022             nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2023                         opt_inst_info->port->dev->ifindex))
2024                 goto nest_cancel;
2025         if (opt_inst->option->array_size &&
2026             nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2027                         opt_inst_info->array_index))
2028                 goto nest_cancel;
2029
2030         switch (option->type) {
2031         case TEAM_OPTION_TYPE_U32:
2032                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2033                         goto nest_cancel;
2034                 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2035                         goto nest_cancel;
2036                 break;
2037         case TEAM_OPTION_TYPE_STRING:
2038                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2039                         goto nest_cancel;
2040                 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2041                                    ctx.data.str_val))
2042                         goto nest_cancel;
2043                 break;
2044         case TEAM_OPTION_TYPE_BINARY:
2045                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2046                         goto nest_cancel;
2047                 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2048                             ctx.data.bin_val.ptr))
2049                         goto nest_cancel;
2050                 break;
2051         case TEAM_OPTION_TYPE_BOOL:
2052                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2053                         goto nest_cancel;
2054                 if (ctx.data.bool_val &&
2055                     nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2056                         goto nest_cancel;
2057                 break;
2058         case TEAM_OPTION_TYPE_S32:
2059                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2060                         goto nest_cancel;
2061                 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2062                         goto nest_cancel;
2063                 break;
2064         default:
2065                 BUG();
2066         }
2067         if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2068                 goto nest_cancel;
2069         if (opt_inst->changed) {
2070                 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2071                         goto nest_cancel;
2072                 opt_inst->changed = false;
2073         }
2074         nla_nest_end(skb, option_item);
2075         return 0;
2076
2077 nest_cancel:
2078         nla_nest_cancel(skb, option_item);
2079         return -EMSGSIZE;
2080 }
2081
2082 static int __send_and_alloc_skb(struct sk_buff **pskb,
2083                                 struct team *team, u32 portid,
2084                                 team_nl_send_func_t *send_func)
2085 {
2086         int err;
2087
2088         if (*pskb) {
2089                 err = send_func(*pskb, team, portid);
2090                 if (err)
2091                         return err;
2092         }
2093         *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2094         if (!*pskb)
2095                 return -ENOMEM;
2096         return 0;
2097 }
2098
2099 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2100                                     int flags, team_nl_send_func_t *send_func,
2101                                     struct list_head *sel_opt_inst_list)
2102 {
2103         struct nlattr *option_list;
2104         struct nlmsghdr *nlh;
2105         void *hdr;
2106         struct team_option_inst *opt_inst;
2107         int err;
2108         struct sk_buff *skb = NULL;
2109         bool incomplete;
2110         int i;
2111
2112         opt_inst = list_first_entry(sel_opt_inst_list,
2113                                     struct team_option_inst, tmp_list);
2114
2115 start_again:
2116         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2117         if (err)
2118                 return err;
2119
2120         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2121                           TEAM_CMD_OPTIONS_GET);
2122         if (!hdr)
2123                 return -EMSGSIZE;
2124
2125         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2126                 goto nla_put_failure;
2127         option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2128         if (!option_list)
2129                 goto nla_put_failure;
2130
2131         i = 0;
2132         incomplete = false;
2133         list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2134                 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2135                 if (err) {
2136                         if (err == -EMSGSIZE) {
2137                                 if (!i)
2138                                         goto errout;
2139                                 incomplete = true;
2140                                 break;
2141                         }
2142                         goto errout;
2143                 }
2144                 i++;
2145         }
2146
2147         nla_nest_end(skb, option_list);
2148         genlmsg_end(skb, hdr);
2149         if (incomplete)
2150                 goto start_again;
2151
2152 send_done:
2153         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2154         if (!nlh) {
2155                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2156                 if (err)
2157                         goto errout;
2158                 goto send_done;
2159         }
2160
2161         return send_func(skb, team, portid);
2162
2163 nla_put_failure:
2164         err = -EMSGSIZE;
2165 errout:
2166         genlmsg_cancel(skb, hdr);
2167         nlmsg_free(skb);
2168         return err;
2169 }
2170
2171 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2172 {
2173         struct team *team;
2174         struct team_option_inst *opt_inst;
2175         int err;
2176         LIST_HEAD(sel_opt_inst_list);
2177
2178         team = team_nl_team_get(info);
2179         if (!team)
2180                 return -EINVAL;
2181
2182         list_for_each_entry(opt_inst, &team->option_inst_list, list)
2183                 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2184         err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2185                                        NLM_F_ACK, team_nl_send_unicast,
2186                                        &sel_opt_inst_list);
2187
2188         team_nl_team_put(team);
2189
2190         return err;
2191 }
2192
2193 static int team_nl_send_event_options_get(struct team *team,
2194                                           struct list_head *sel_opt_inst_list);
2195
2196 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2197 {
2198         struct team *team;
2199         int err = 0;
2200         int i;
2201         struct nlattr *nl_option;
2202         LIST_HEAD(opt_inst_list);
2203
2204         team = team_nl_team_get(info);
2205         if (!team)
2206                 return -EINVAL;
2207
2208         err = -EINVAL;
2209         if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2210                 err = -EINVAL;
2211                 goto team_put;
2212         }
2213
2214         nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2215                 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2216                 struct nlattr *attr;
2217                 struct nlattr *attr_data;
2218                 enum team_option_type opt_type;
2219                 int opt_port_ifindex = 0; /* != 0 for per-port options */
2220                 u32 opt_array_index = 0;
2221                 bool opt_is_array = false;
2222                 struct team_option_inst *opt_inst;
2223                 char *opt_name;
2224                 bool opt_found = false;
2225
2226                 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2227                         err = -EINVAL;
2228                         goto team_put;
2229                 }
2230                 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2231                                        nl_option, team_nl_option_policy);
2232                 if (err)
2233                         goto team_put;
2234                 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2235                     !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2236                         err = -EINVAL;
2237                         goto team_put;
2238                 }
2239                 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2240                 case NLA_U32:
2241                         opt_type = TEAM_OPTION_TYPE_U32;
2242                         break;
2243                 case NLA_STRING:
2244                         opt_type = TEAM_OPTION_TYPE_STRING;
2245                         break;
2246                 case NLA_BINARY:
2247                         opt_type = TEAM_OPTION_TYPE_BINARY;
2248                         break;
2249                 case NLA_FLAG:
2250                         opt_type = TEAM_OPTION_TYPE_BOOL;
2251                         break;
2252                 case NLA_S32:
2253                         opt_type = TEAM_OPTION_TYPE_S32;
2254                         break;
2255                 default:
2256                         goto team_put;
2257                 }
2258
2259                 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2260                 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2261                         err = -EINVAL;
2262                         goto team_put;
2263                 }
2264
2265                 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2266                 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2267                 if (attr)
2268                         opt_port_ifindex = nla_get_u32(attr);
2269
2270                 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2271                 if (attr) {
2272                         opt_is_array = true;
2273                         opt_array_index = nla_get_u32(attr);
2274                 }
2275
2276                 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2277                         struct team_option *option = opt_inst->option;
2278                         struct team_gsetter_ctx ctx;
2279                         struct team_option_inst_info *opt_inst_info;
2280                         int tmp_ifindex;
2281
2282                         opt_inst_info = &opt_inst->info;
2283                         tmp_ifindex = opt_inst_info->port ?
2284                                       opt_inst_info->port->dev->ifindex : 0;
2285                         if (option->type != opt_type ||
2286                             strcmp(option->name, opt_name) ||
2287                             tmp_ifindex != opt_port_ifindex ||
2288                             (option->array_size && !opt_is_array) ||
2289                             opt_inst_info->array_index != opt_array_index)
2290                                 continue;
2291                         opt_found = true;
2292                         ctx.info = opt_inst_info;
2293                         switch (opt_type) {
2294                         case TEAM_OPTION_TYPE_U32:
2295                                 ctx.data.u32_val = nla_get_u32(attr_data);
2296                                 break;
2297                         case TEAM_OPTION_TYPE_STRING:
2298                                 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2299                                         err = -EINVAL;
2300                                         goto team_put;
2301                                 }
2302                                 ctx.data.str_val = nla_data(attr_data);
2303                                 break;
2304                         case TEAM_OPTION_TYPE_BINARY:
2305                                 ctx.data.bin_val.len = nla_len(attr_data);
2306                                 ctx.data.bin_val.ptr = nla_data(attr_data);
2307                                 break;
2308                         case TEAM_OPTION_TYPE_BOOL:
2309                                 ctx.data.bool_val = attr_data ? true : false;
2310                                 break;
2311                         case TEAM_OPTION_TYPE_S32:
2312                                 ctx.data.s32_val = nla_get_s32(attr_data);
2313                                 break;
2314                         default:
2315                                 BUG();
2316                         }
2317                         err = team_option_set(team, opt_inst, &ctx);
2318                         if (err)
2319                                 goto team_put;
2320                         opt_inst->changed = true;
2321                         list_add(&opt_inst->tmp_list, &opt_inst_list);
2322                 }
2323                 if (!opt_found) {
2324                         err = -ENOENT;
2325                         goto team_put;
2326                 }
2327         }
2328
2329         err = team_nl_send_event_options_get(team, &opt_inst_list);
2330
2331 team_put:
2332         team_nl_team_put(team);
2333
2334         return err;
2335 }
2336
2337 static int team_nl_fill_port_list_get(struct sk_buff *skb,
2338                                       u32 portid, u32 seq, int flags,
2339                                       struct team *team,
2340                                       bool fillall)
2341 {
2342         struct nlattr *port_list;
2343         void *hdr;
2344         struct team_port *port;
2345
2346         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags,
2347                           TEAM_CMD_PORT_LIST_GET);
2348         if (!hdr)
2349                 return -EMSGSIZE;
2350
2351         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2352                 goto nla_put_failure;
2353         port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2354         if (!port_list)
2355                 goto nla_put_failure;
2356
2357         list_for_each_entry(port, &team->port_list, list) {
2358                 struct nlattr *port_item;
2359
2360                 /* Include only changed ports if fill all mode is not on */
2361                 if (!fillall && !port->changed)
2362                         continue;
2363                 port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2364                 if (!port_item)
2365                         goto nla_put_failure;
2366                 if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2367                         goto nla_put_failure;
2368                 if (port->changed) {
2369                         if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2370                                 goto nla_put_failure;
2371                         port->changed = false;
2372                 }
2373                 if ((port->removed &&
2374                      nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2375                     (port->state.linkup &&
2376                      nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2377                     nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2378                     nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2379                         goto nla_put_failure;
2380                 nla_nest_end(skb, port_item);
2381         }
2382
2383         nla_nest_end(skb, port_list);
2384         return genlmsg_end(skb, hdr);
2385
2386 nla_put_failure:
2387         genlmsg_cancel(skb, hdr);
2388         return -EMSGSIZE;
2389 }
2390
2391 static int team_nl_fill_port_list_get_all(struct sk_buff *skb,
2392                                           struct genl_info *info, int flags,
2393                                           struct team *team)
2394 {
2395         return team_nl_fill_port_list_get(skb, info->snd_portid,
2396                                           info->snd_seq, NLM_F_ACK,
2397                                           team, true);
2398 }
2399
2400 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2401                                      struct genl_info *info)
2402 {
2403         struct team *team;
2404         int err;
2405
2406         team = team_nl_team_get(info);
2407         if (!team)
2408                 return -EINVAL;
2409
2410         err = team_nl_send_generic(info, team, team_nl_fill_port_list_get_all);
2411
2412         team_nl_team_put(team);
2413
2414         return err;
2415 }
2416
2417 static struct genl_ops team_nl_ops[] = {
2418         {
2419                 .cmd = TEAM_CMD_NOOP,
2420                 .doit = team_nl_cmd_noop,
2421                 .policy = team_nl_policy,
2422         },
2423         {
2424                 .cmd = TEAM_CMD_OPTIONS_SET,
2425                 .doit = team_nl_cmd_options_set,
2426                 .policy = team_nl_policy,
2427                 .flags = GENL_ADMIN_PERM,
2428         },
2429         {
2430                 .cmd = TEAM_CMD_OPTIONS_GET,
2431                 .doit = team_nl_cmd_options_get,
2432                 .policy = team_nl_policy,
2433                 .flags = GENL_ADMIN_PERM,
2434         },
2435         {
2436                 .cmd = TEAM_CMD_PORT_LIST_GET,
2437                 .doit = team_nl_cmd_port_list_get,
2438                 .policy = team_nl_policy,
2439                 .flags = GENL_ADMIN_PERM,
2440         },
2441 };
2442
2443 static struct genl_multicast_group team_change_event_mcgrp = {
2444         .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME,
2445 };
2446
2447 static int team_nl_send_multicast(struct sk_buff *skb,
2448                                   struct team *team, u32 portid)
2449 {
2450         return genlmsg_multicast_netns(dev_net(team->dev), skb, 0,
2451                                        team_change_event_mcgrp.id, GFP_KERNEL);
2452 }
2453
2454 static int team_nl_send_event_options_get(struct team *team,
2455                                           struct list_head *sel_opt_inst_list)
2456 {
2457         return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2458                                         sel_opt_inst_list);
2459 }
2460
2461 static int team_nl_send_event_port_list_get(struct team *team)
2462 {
2463         struct sk_buff *skb;
2464         int err;
2465         struct net *net = dev_net(team->dev);
2466
2467         skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2468         if (!skb)
2469                 return -ENOMEM;
2470
2471         err = team_nl_fill_port_list_get(skb, 0, 0, 0, team, false);
2472         if (err < 0)
2473                 goto err_fill;
2474
2475         err = genlmsg_multicast_netns(net, skb, 0, team_change_event_mcgrp.id,
2476                                       GFP_KERNEL);
2477         return err;
2478
2479 err_fill:
2480         nlmsg_free(skb);
2481         return err;
2482 }
2483
2484 static int team_nl_init(void)
2485 {
2486         int err;
2487
2488         err = genl_register_family_with_ops(&team_nl_family, team_nl_ops,
2489                                             ARRAY_SIZE(team_nl_ops));
2490         if (err)
2491                 return err;
2492
2493         err = genl_register_mc_group(&team_nl_family, &team_change_event_mcgrp);
2494         if (err)
2495                 goto err_change_event_grp_reg;
2496
2497         return 0;
2498
2499 err_change_event_grp_reg:
2500         genl_unregister_family(&team_nl_family);
2501
2502         return err;
2503 }
2504
2505 static void team_nl_fini(void)
2506 {
2507         genl_unregister_family(&team_nl_family);
2508 }
2509
2510
2511 /******************
2512  * Change checkers
2513  ******************/
2514
2515 static void __team_options_change_check(struct team *team)
2516 {
2517         int err;
2518         struct team_option_inst *opt_inst;
2519         LIST_HEAD(sel_opt_inst_list);
2520
2521         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2522                 if (opt_inst->changed)
2523                         list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2524         }
2525         err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2526         if (err && err != -ESRCH)
2527                 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2528                             err);
2529 }
2530
2531 /* rtnl lock is held */
2532
2533 static void __team_port_change_send(struct team_port *port, bool linkup)
2534 {
2535         int err;
2536
2537         port->changed = true;
2538         port->state.linkup = linkup;
2539         team_refresh_port_linkup(port);
2540         if (linkup) {
2541                 struct ethtool_cmd ecmd;
2542
2543                 err = __ethtool_get_settings(port->dev, &ecmd);
2544                 if (!err) {
2545                         port->state.speed = ethtool_cmd_speed(&ecmd);
2546                         port->state.duplex = ecmd.duplex;
2547                         goto send_event;
2548                 }
2549         }
2550         port->state.speed = 0;
2551         port->state.duplex = 0;
2552
2553 send_event:
2554         err = team_nl_send_event_port_list_get(port->team);
2555         if (err && err != -ESRCH)
2556                 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2557                             port->dev->name, err);
2558
2559 }
2560
2561 static void __team_carrier_check(struct team *team)
2562 {
2563         struct team_port *port;
2564         bool team_linkup;
2565
2566         team_linkup = false;
2567         list_for_each_entry(port, &team->port_list, list) {
2568                 if (port->linkup) {
2569                         team_linkup = true;
2570                         break;
2571                 }
2572         }
2573
2574         if (team_linkup)
2575                 netif_carrier_on(team->dev);
2576         else
2577                 netif_carrier_off(team->dev);
2578 }
2579
2580 static void __team_port_change_check(struct team_port *port, bool linkup)
2581 {
2582         if (port->state.linkup != linkup)
2583                 __team_port_change_send(port, linkup);
2584         __team_carrier_check(port->team);
2585 }
2586
2587 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2588 {
2589         __team_port_change_send(port, linkup);
2590         __team_carrier_check(port->team);
2591 }
2592
2593 static void __team_port_change_port_removed(struct team_port *port)
2594 {
2595         port->removed = true;
2596         __team_port_change_send(port, false);
2597         __team_carrier_check(port->team);
2598 }
2599
2600 static void team_port_change_check(struct team_port *port, bool linkup)
2601 {
2602         struct team *team = port->team;
2603
2604         mutex_lock(&team->lock);
2605         __team_port_change_check(port, linkup);
2606         mutex_unlock(&team->lock);
2607 }
2608
2609
2610 /************************************
2611  * Net device notifier event handler
2612  ************************************/
2613
2614 static int team_device_event(struct notifier_block *unused,
2615                              unsigned long event, void *ptr)
2616 {
2617         struct net_device *dev = (struct net_device *) ptr;
2618         struct team_port *port;
2619
2620         port = team_port_get_rtnl(dev);
2621         if (!port)
2622                 return NOTIFY_DONE;
2623
2624         switch (event) {
2625         case NETDEV_UP:
2626                 if (netif_carrier_ok(dev))
2627                         team_port_change_check(port, true);
2628         case NETDEV_DOWN:
2629                 team_port_change_check(port, false);
2630         case NETDEV_CHANGE:
2631                 if (netif_running(port->dev))
2632                         team_port_change_check(port,
2633                                                !!netif_carrier_ok(port->dev));
2634                 break;
2635         case NETDEV_UNREGISTER:
2636                 team_del_slave(port->team->dev, dev);
2637                 break;
2638         case NETDEV_FEAT_CHANGE:
2639                 team_compute_features(port->team);
2640                 break;
2641         case NETDEV_CHANGEMTU:
2642                 /* Forbid to change mtu of underlaying device */
2643                 return NOTIFY_BAD;
2644         case NETDEV_PRE_TYPE_CHANGE:
2645                 /* Forbid to change type of underlaying device */
2646                 return NOTIFY_BAD;
2647         }
2648         return NOTIFY_DONE;
2649 }
2650
2651 static struct notifier_block team_notifier_block __read_mostly = {
2652         .notifier_call = team_device_event,
2653 };
2654
2655
2656 /***********************
2657  * Module init and exit
2658  ***********************/
2659
2660 static int __init team_module_init(void)
2661 {
2662         int err;
2663
2664         register_netdevice_notifier(&team_notifier_block);
2665
2666         err = rtnl_link_register(&team_link_ops);
2667         if (err)
2668                 goto err_rtnl_reg;
2669
2670         err = team_nl_init();
2671         if (err)
2672                 goto err_nl_init;
2673
2674         return 0;
2675
2676 err_nl_init:
2677         rtnl_link_unregister(&team_link_ops);
2678
2679 err_rtnl_reg:
2680         unregister_netdevice_notifier(&team_notifier_block);
2681
2682         return err;
2683 }
2684
2685 static void __exit team_module_exit(void)
2686 {
2687         team_nl_fini();
2688         rtnl_link_unregister(&team_link_ops);
2689         unregister_netdevice_notifier(&team_notifier_block);
2690 }
2691
2692 module_init(team_module_init);
2693 module_exit(team_module_exit);
2694
2695 MODULE_LICENSE("GPL v2");
2696 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
2697 MODULE_DESCRIPTION("Ethernet team device driver");
2698 MODULE_ALIAS_RTNL_LINK(DRV_NAME);