drivers/net/team/team.c

   1 /*
   2  * drivers/net/team/team.c - Network team device driver
   3  * Copyright (c) 2011 Jiri Pirko <[email protected]>
   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 static int team_port_set_team_dev_addr(struct team *team,
  77                                        struct team_port *port)
  78 {
  79         return __set_port_dev_addr(port->dev, team->dev->dev_addr);
  80 }
  81
  82 int team_modeop_port_enter(struct team *team, struct team_port *port)
  83 {
  84         return team_port_set_team_dev_addr(team, port);
  85 }
  86 EXPORT_SYMBOL(team_modeop_port_enter);
  87
  88 void team_modeop_port_change_dev_addr(struct team *team,
  89                                       struct team_port *port)
  90 {
  91         team_port_set_team_dev_addr(team, port);
  92 }
  93 EXPORT_SYMBOL(team_modeop_port_change_dev_addr);
  94
  95 static void team_refresh_port_linkup(struct team_port *port)
  96 {
  97         port->linkup = port->user.linkup_enabled ? port->user.linkup :
  98                                                    port->state.linkup;
  99 }
 100
 101
 102 /*******************
 103  * Options handling
 104  *******************/
 105
 106 struct team_option_inst { /* One for each option instance */
 107         struct list_head list;
 108         struct list_head tmp_list;
 109         struct team_option *option;
 110         struct team_option_inst_info info;
 111         bool changed;
 112         bool removed;
 113 };
 114
 115 static struct team_option *__team_find_option(struct team *team,
 116                                               const char *opt_name)
 117 {
 118         struct team_option *option;
 119
 120         list_for_each_entry(option, &team->option_list, list) {
 121                 if (strcmp(option->name, opt_name) == 0)
 122                         return option;
 123         }
 124         return NULL;
 125 }
 126
 127 static void __team_option_inst_del(struct team_option_inst *opt_inst)
 128 {
 129         list_del(&opt_inst->list);
 130         kfree(opt_inst);
 131 }
 132
 133 static void __team_option_inst_del_option(struct team *team,
 134                                           struct team_option *option)
 135 {
 136         struct team_option_inst *opt_inst, *tmp;
 137
 138         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 139                 if (opt_inst->option == option)
 140                         __team_option_inst_del(opt_inst);
 141         }
 142 }
 143
 144 static int __team_option_inst_add(struct team *team, struct team_option *option,
 145                                   struct team_port *port)
 146 {
 147         struct team_option_inst *opt_inst;
 148         unsigned int array_size;
 149         unsigned int i;
 150         int err;
 151
 152         array_size = option->array_size;
 153         if (!array_size)
 154                 array_size = 1; /* No array but still need one instance */
 155
 156         for (i = 0; i < array_size; i++) {
 157                 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL);
 158                 if (!opt_inst)
 159                         return -ENOMEM;
 160                 opt_inst->option = option;
 161                 opt_inst->info.port = port;
 162                 opt_inst->info.array_index = i;
 163                 opt_inst->changed = true;
 164                 opt_inst->removed = false;
 165                 list_add_tail(&opt_inst->list, &team->option_inst_list);
 166                 if (option->init) {
 167                         err = option->init(team, &opt_inst->info);
 168                         if (err)
 169                                 return err;
 170                 }
 171
 172         }
 173         return 0;
 174 }
 175
 176 static int __team_option_inst_add_option(struct team *team,
 177                                          struct team_option *option)
 178 {
 179         struct team_port *port;
 180         int err;
 181
 182         if (!option->per_port) {
 183                 err = __team_option_inst_add(team, option, NULL);
 184                 if (err)
 185                         goto inst_del_option;
 186         }
 187
 188         list_for_each_entry(port, &team->port_list, list) {
 189                 err = __team_option_inst_add(team, option, port);
 190                 if (err)
 191                         goto inst_del_option;
 192         }
 193         return 0;
 194
 195 inst_del_option:
 196         __team_option_inst_del_option(team, option);
 197         return err;
 198 }
 199
 200 static void __team_option_inst_mark_removed_option(struct team *team,
 201                                                    struct team_option *option)
 202 {
 203         struct team_option_inst *opt_inst;
 204
 205         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 206                 if (opt_inst->option == option) {
 207                         opt_inst->changed = true;
 208                         opt_inst->removed = true;
 209                 }
 210         }
 211 }
 212
 213 static void __team_option_inst_del_port(struct team *team,
 214                                         struct team_port *port)
 215 {
 216         struct team_option_inst *opt_inst, *tmp;
 217
 218         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 219                 if (opt_inst->option->per_port &&
 220                     opt_inst->info.port == port)
 221                         __team_option_inst_del(opt_inst);
 222         }
 223 }
 224
 225 static int __team_option_inst_add_port(struct team *team,
 226                                        struct team_port *port)
 227 {
 228         struct team_option *option;
 229         int err;
 230
 231         list_for_each_entry(option, &team->option_list, list) {
 232                 if (!option->per_port)
 233                         continue;
 234                 err = __team_option_inst_add(team, option, port);
 235                 if (err)
 236                         goto inst_del_port;
 237         }
 238         return 0;
 239
 240 inst_del_port:
 241         __team_option_inst_del_port(team, port);
 242         return err;
 243 }
 244
 245 static void __team_option_inst_mark_removed_port(struct team *team,
 246                                                  struct team_port *port)
 247 {
 248         struct team_option_inst *opt_inst;
 249
 250         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 251                 if (opt_inst->info.port == port) {
 252                         opt_inst->changed = true;
 253                         opt_inst->removed = true;
 254                 }
 255         }
 256 }
 257
 258 static int __team_options_register(struct team *team,
 259                                    const struct team_option *option,
 260                                    size_t option_count)
 261 {
 262         int i;
 263         struct team_option **dst_opts;
 264         int err;
 265
 266         dst_opts = kzalloc(sizeof(struct team_option *) * option_count,
 267                            GFP_KERNEL);
 268         if (!dst_opts)
 269                 return -ENOMEM;
 270         for (i = 0; i < option_count; i++, option++) {
 271                 if (__team_find_option(team, option->name)) {
 272                         err = -EEXIST;
 273                         goto alloc_rollback;
 274                 }
 275                 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
 276                 if (!dst_opts[i]) {
 277                         err = -ENOMEM;
 278                         goto alloc_rollback;
 279                 }
 280         }
 281
 282         for (i = 0; i < option_count; i++) {
 283                 err = __team_option_inst_add_option(team, dst_opts[i]);
 284                 if (err)
 285                         goto inst_rollback;
 286                 list_add_tail(&dst_opts[i]->list, &team->option_list);
 287         }
 288
 289         kfree(dst_opts);
 290         return 0;
 291
 292 inst_rollback:
 293         for (i--; i >= 0; i--)
 294                 __team_option_inst_del_option(team, dst_opts[i]);
 295
 296         i = option_count - 1;
 297 alloc_rollback:
 298         for (i--; i >= 0; i--)
 299                 kfree(dst_opts[i]);
 300
 301         kfree(dst_opts);
 302         return err;
 303 }
 304
 305 static void __team_options_mark_removed(struct team *team,
 306                                         const struct team_option *option,
 307                                         size_t option_count)
 308 {
 309         int i;
 310
 311         for (i = 0; i < option_count; i++, option++) {
 312                 struct team_option *del_opt;
 313
 314                 del_opt = __team_find_option(team, option->name);
 315                 if (del_opt)
 316                         __team_option_inst_mark_removed_option(team, del_opt);
 317         }
 318 }
 319
 320 static void __team_options_unregister(struct team *team,
 321                                       const struct team_option *option,
 322                                       size_t option_count)
 323 {
 324         int i;
 325
 326         for (i = 0; i < option_count; i++, option++) {
 327                 struct team_option *del_opt;
 328
 329                 del_opt = __team_find_option(team, option->name);
 330                 if (del_opt) {
 331                         __team_option_inst_del_option(team, del_opt);
 332                         list_del(&del_opt->list);
 333                         kfree(del_opt);
 334                 }
 335         }
 336 }
 337
 338 static void __team_options_change_check(struct team *team);
 339
 340 int team_options_register(struct team *team,
 341                           const struct team_option *option,
 342                           size_t option_count)
 343 {
 344         int err;
 345
 346         err = __team_options_register(team, option, option_count);
 347         if (err)
 348                 return err;
 349         __team_options_change_check(team);
 350         return 0;
 351 }
 352 EXPORT_SYMBOL(team_options_register);
 353
 354 void team_options_unregister(struct team *team,
 355                              const struct team_option *option,
 356                              size_t option_count)
 357 {
 358         __team_options_mark_removed(team, option, option_count);
 359         __team_options_change_check(team);
 360         __team_options_unregister(team, option, option_count);
 361 }
 362 EXPORT_SYMBOL(team_options_unregister);
 363
 364 static int team_option_get(struct team *team,
 365                            struct team_option_inst *opt_inst,
 366                            struct team_gsetter_ctx *ctx)
 367 {
 368         if (!opt_inst->option->getter)
 369                 return -EOPNOTSUPP;
 370         return opt_inst->option->getter(team, ctx);
 371 }
 372
 373 static int team_option_set(struct team *team,
 374                            struct team_option_inst *opt_inst,
 375                            struct team_gsetter_ctx *ctx)
 376 {
 377         if (!opt_inst->option->setter)
 378                 return -EOPNOTSUPP;
 379         return opt_inst->option->setter(team, ctx);
 380 }
 381
 382 void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info)
 383 {
 384         struct team_option_inst *opt_inst;
 385
 386         opt_inst = container_of(opt_inst_info, struct team_option_inst, info);
 387         opt_inst->changed = true;
 388 }
 389 EXPORT_SYMBOL(team_option_inst_set_change);
 390
 391 void team_options_change_check(struct team *team)
 392 {
 393         __team_options_change_check(team);
 394 }
 395 EXPORT_SYMBOL(team_options_change_check);
 396
 397
 398 /****************
 399  * Mode handling
 400  ****************/
 401
 402 static LIST_HEAD(mode_list);
 403 static DEFINE_SPINLOCK(mode_list_lock);
 404
 405 struct team_mode_item {
 406         struct list_head list;
 407         const struct team_mode *mode;
 408 };
 409
 410 static struct team_mode_item *__find_mode(const char *kind)
 411 {
 412         struct team_mode_item *mitem;
 413
 414         list_for_each_entry(mitem, &mode_list, list) {
 415                 if (strcmp(mitem->mode->kind, kind) == 0)
 416                         return mitem;
 417         }
 418         return NULL;
 419 }
 420
 421 static bool is_good_mode_name(const char *name)
 422 {
 423         while (*name != '\0') {
 424                 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
 425                         return false;
 426                 name++;
 427         }
 428         return true;
 429 }
 430
 431 int team_mode_register(const struct team_mode *mode)
 432 {
 433         int err = 0;
 434         struct team_mode_item *mitem;
 435
 436         if (!is_good_mode_name(mode->kind) ||
 437             mode->priv_size > TEAM_MODE_PRIV_SIZE)
 438                 return -EINVAL;
 439
 440         mitem = kmalloc(sizeof(*mitem), GFP_KERNEL);
 441         if (!mitem)
 442                 return -ENOMEM;
 443
 444         spin_lock(&mode_list_lock);
 445         if (__find_mode(mode->kind)) {
 446                 err = -EEXIST;
 447                 kfree(mitem);
 448                 goto unlock;
 449         }
 450         mitem->mode = mode;
 451         list_add_tail(&mitem->list, &mode_list);
 452 unlock:
 453         spin_unlock(&mode_list_lock);
 454         return err;
 455 }
 456 EXPORT_SYMBOL(team_mode_register);
 457
 458 void team_mode_unregister(const struct team_mode *mode)
 459 {
 460         struct team_mode_item *mitem;
 461
 462         spin_lock(&mode_list_lock);
 463         mitem = __find_mode(mode->kind);
 464         if (mitem) {
 465                 list_del_init(&mitem->list);
 466                 kfree(mitem);
 467         }
 468         spin_unlock(&mode_list_lock);
 469 }
 470 EXPORT_SYMBOL(team_mode_unregister);
 471
 472 static const struct team_mode *team_mode_get(const char *kind)
 473 {
 474         struct team_mode_item *mitem;
 475         const struct team_mode *mode = NULL;
 476
 477         spin_lock(&mode_list_lock);
 478         mitem = __find_mode(kind);
 479         if (!mitem) {
 480                 spin_unlock(&mode_list_lock);
 481                 request_module("team-mode-%s", kind);
 482                 spin_lock(&mode_list_lock);
 483                 mitem = __find_mode(kind);
 484         }
 485         if (mitem) {
 486                 mode = mitem->mode;
 487                 if (!try_module_get(mode->owner))
 488                         mode = NULL;
 489         }
 490
 491         spin_unlock(&mode_list_lock);
 492         return mode;
 493 }
 494
 495 static void team_mode_put(const struct team_mode *mode)
 496 {
 497         module_put(mode->owner);
 498 }
 499
 500 static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
 501 {
 502         dev_kfree_skb_any(skb);
 503         return false;
 504 }
 505
 506 static rx_handler_result_t team_dummy_receive(struct team *team,
 507                                               struct team_port *port,
 508                                               struct sk_buff *skb)
 509 {
 510         return RX_HANDLER_ANOTHER;
 511 }
 512
 513 static const struct team_mode __team_no_mode = {
 514         .kind           = "*NOMODE*",
 515 };
 516
 517 static bool team_is_mode_set(struct team *team)
 518 {
 519         return team->mode != &__team_no_mode;
 520 }
 521
 522 static void team_set_no_mode(struct team *team)
 523 {
 524         team->user_carrier_enabled = false;
 525         team->mode = &__team_no_mode;
 526 }
 527
 528 static void __team_adjust_ops(struct team *team, int en_port_count)
 529 {
 530         /*
 531          * To avoid checks in rx/tx skb paths, ensure here that non-null and
 532          * correct ops are always set.
 533          */
 534
 535         if (!en_port_count || !team_is_mode_set(team) ||
 536             !team->mode->ops->transmit)
 537                 team->ops.transmit = team_dummy_transmit;
 538         else
 539                 team->ops.transmit = team->mode->ops->transmit;
 540
 541         if (!en_port_count || !team_is_mode_set(team) ||
 542             !team->mode->ops->receive)
 543                 team->ops.receive = team_dummy_receive;
 544         else
 545                 team->ops.receive = team->mode->ops->receive;
 546 }
 547
 548 static void team_adjust_ops(struct team *team)
 549 {
 550         __team_adjust_ops(team, team->en_port_count);
 551 }
 552
 553 /*
 554  * We can benefit from the fact that it's ensured no port is present
 555  * at the time of mode change. Therefore no packets are in fly so there's no
 556  * need to set mode operations in any special way.
 557  */
 558 static int __team_change_mode(struct team *team,
 559                               const struct team_mode *new_mode)
 560 {
 561         /* Check if mode was previously set and do cleanup if so */
 562         if (team_is_mode_set(team)) {
 563                 void (*exit_op)(struct team *team) = team->ops.exit;
 564
 565                 /* Clear ops area so no callback is called any longer */
 566                 memset(&team->ops, 0, sizeof(struct team_mode_ops));
 567                 team_adjust_ops(team);
 568
 569                 if (exit_op)
 570                         exit_op(team);
 571                 team_mode_put(team->mode);
 572                 team_set_no_mode(team);
 573                 /* zero private data area */
 574                 memset(&team->mode_priv, 0,
 575                        sizeof(struct team) - offsetof(struct team, mode_priv));
 576         }
 577
 578         if (!new_mode)
 579                 return 0;
 580
 581         if (new_mode->ops->init) {
 582                 int err;
 583
 584                 err = new_mode->ops->init(team);
 585                 if (err)
 586                         return err;
 587         }
 588
 589         team->mode = new_mode;
 590         memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
 591         team_adjust_ops(team);
 592
 593         return 0;
 594 }
 595
 596 static int team_change_mode(struct team *team, const char *kind)
 597 {
 598         const struct team_mode *new_mode;
 599         struct net_device *dev = team->dev;
 600         int err;
 601
 602         if (!list_empty(&team->port_list)) {
 603                 netdev_err(dev, "No ports can be present during mode change\n");
 604                 return -EBUSY;
 605         }
 606
 607         if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) {
 608                 netdev_err(dev, "Unable to change to the same mode the team is in\n");
 609                 return -EINVAL;
 610         }
 611
 612         new_mode = team_mode_get(kind);
 613         if (!new_mode) {
 614                 netdev_err(dev, "Mode \"%s\" not found\n", kind);
 615                 return -EINVAL;
 616         }
 617
 618         err = __team_change_mode(team, new_mode);
 619         if (err) {
 620                 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
 621                 team_mode_put(new_mode);
 622                 return err;
 623         }
 624
 625         netdev_info(dev, "Mode changed to \"%s\"\n", kind);
 626         return 0;
 627 }
 628
 629
 630 /************************
 631  * Rx path frame handler
 632  ************************/
 633
 634 /* note: already called with rcu_read_lock */
 635 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
 636 {
 637         struct sk_buff *skb = *pskb;
 638         struct team_port *port;
 639         struct team *team;
 640         rx_handler_result_t res;
 641
 642         skb = skb_share_check(skb, GFP_ATOMIC);
 643         if (!skb)
 644                 return RX_HANDLER_CONSUMED;
 645
 646         *pskb = skb;
 647
 648         port = team_port_get_rcu(skb->dev);
 649         team = port->team;
 650         if (!team_port_enabled(port)) {
 651                 /* allow exact match delivery for disabled ports */
 652                 res = RX_HANDLER_EXACT;
 653         } else {
 654                 res = team->ops.receive(team, port, skb);
 655         }
 656         if (res == RX_HANDLER_ANOTHER) {
 657                 struct team_pcpu_stats *pcpu_stats;
 658
 659                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
 660                 u64_stats_update_begin(&pcpu_stats->syncp);
 661                 pcpu_stats->rx_packets++;
 662                 pcpu_stats->rx_bytes += skb->len;
 663                 if (skb->pkt_type == PACKET_MULTICAST)
 664                         pcpu_stats->rx_multicast++;
 665                 u64_stats_update_end(&pcpu_stats->syncp);
 666
 667                 skb->dev = team->dev;
 668         } else {
 669                 this_cpu_inc(team->pcpu_stats->rx_dropped);
 670         }
 671
 672         return res;
 673 }
 674
 675
 676 /*************************************
 677  * Multiqueue Tx port select override
 678  *************************************/
 679
 680 static int team_queue_override_init(struct team *team)
 681 {
 682         struct list_head *listarr;
 683         unsigned int queue_cnt = team->dev->num_tx_queues - 1;
 684         unsigned int i;
 685
 686         if (!queue_cnt)
 687                 return 0;
 688         listarr = kmalloc(sizeof(struct list_head) * queue_cnt, GFP_KERNEL);
 689         if (!listarr)
 690                 return -ENOMEM;
 691         team->qom_lists = listarr;
 692         for (i = 0; i < queue_cnt; i++)
 693                 INIT_LIST_HEAD(listarr++);
 694         return 0;
 695 }
 696
 697 static void team_queue_override_fini(struct team *team)
 698 {
 699         kfree(team->qom_lists);
 700 }
 701
 702 static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
 703 {
 704         return &team->qom_lists[queue_id - 1];
 705 }
 706
 707 /*
 708  * note: already called with rcu_read_lock
 709  */
 710 static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
 711 {
 712         struct list_head *qom_list;
 713         struct team_port *port;
 714
 715         if (!team->queue_override_enabled || !skb->queue_mapping)
 716                 return false;
 717         qom_list = __team_get_qom_list(team, skb->queue_mapping);
 718         list_for_each_entry_rcu(port, qom_list, qom_list) {
 719                 if (!team_dev_queue_xmit(team, port, skb))
 720                         return true;
 721         }
 722         return false;
 723 }
 724
 725 static void __team_queue_override_port_del(struct team *team,
 726                                            struct team_port *port)
 727 {
 728         list_del_rcu(&port->qom_list);
 729         synchronize_rcu();
 730         INIT_LIST_HEAD(&port->qom_list);
 731 }
 732
 733 static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
 734                                                       struct team_port *cur)
 735 {
 736         if (port->priority < cur->priority)
 737                 return true;
 738         if (port->priority > cur->priority)
 739                 return false;
 740         if (port->index < cur->index)
 741                 return true;
 742         return false;
 743 }
 744
 745 static void __team_queue_override_port_add(struct team *team,
 746                                            struct team_port *port)
 747 {
 748         struct team_port *cur;
 749         struct list_head *qom_list;
 750         struct list_head *node;
 751
 752         if (!port->queue_id || !team_port_enabled(port))
 753                 return;
 754
 755         qom_list = __team_get_qom_list(team, port->queue_id);
 756         node = qom_list;
 757         list_for_each_entry(cur, qom_list, qom_list) {
 758                 if (team_queue_override_port_has_gt_prio_than(port, cur))
 759                         break;
 760                 node = &cur->qom_list;
 761         }
 762         list_add_tail_rcu(&port->qom_list, node);
 763 }
 764
 765 static void __team_queue_override_enabled_check(struct team *team)
 766 {
 767         struct team_port *port;
 768         bool enabled = false;
 769
 770         list_for_each_entry(port, &team->port_list, list) {
 771                 if (!list_empty(&port->qom_list)) {
 772                         enabled = true;
 773                         break;
 774                 }
 775         }
 776         if (enabled == team->queue_override_enabled)
 777                 return;
 778         netdev_dbg(team->dev, "%s queue override\n",
 779                    enabled ? "Enabling" : "Disabling");
 780         team->queue_override_enabled = enabled;
 781 }
 782
 783 static void team_queue_override_port_refresh(struct team *team,
 784                                              struct team_port *port)
 785 {
 786         __team_queue_override_port_del(team, port);
 787         __team_queue_override_port_add(team, port);
 788         __team_queue_override_enabled_check(team);
 789 }
 790
 791
 792 /****************
 793  * Port handling
 794  ****************/
 795
 796 static bool team_port_find(const struct team *team,
 797                            const struct team_port *port)
 798 {
 799         struct team_port *cur;
 800
 801         list_for_each_entry(cur, &team->port_list, list)
 802                 if (cur == port)
 803                         return true;
 804         return false;
 805 }
 806
 807 /*
 808  * Enable/disable port by adding to enabled port hashlist and setting
 809  * port->index (Might be racy so reader could see incorrect ifindex when
 810  * processing a flying packet, but that is not a problem). Write guarded
 811  * by team->lock.
 812  */
 813 static void team_port_enable(struct team *team,
 814                              struct team_port *port)
 815 {
 816         if (team_port_enabled(port))
 817                 return;
 818         port->index = team->en_port_count++;
 819         hlist_add_head_rcu(&port->hlist,
 820                            team_port_index_hash(team, port->index));
 821         team_adjust_ops(team);
 822         team_queue_override_port_refresh(team, port);
 823         if (team->ops.port_enabled)
 824                 team->ops.port_enabled(team, port);
 825 }
 826
 827 static void __reconstruct_port_hlist(struct team *team, int rm_index)
 828 {
 829         int i;
 830         struct team_port *port;
 831
 832         for (i = rm_index + 1; i < team->en_port_count; i++) {
 833                 port = team_get_port_by_index(team, i);
 834                 hlist_del_rcu(&port->hlist);
 835                 port->index--;
 836                 hlist_add_head_rcu(&port->hlist,
 837                                    team_port_index_hash(team, port->index));
 838         }
 839 }
 840
 841 static void team_port_disable(struct team *team,
 842                               struct team_port *port)
 843 {
 844         if (!team_port_enabled(port))
 845                 return;
 846         if (team->ops.port_disabled)
 847                 team->ops.port_disabled(team, port);
 848         hlist_del_rcu(&port->hlist);
 849         __reconstruct_port_hlist(team, port->index);
 850         port->index = -1;
 851         team_queue_override_port_refresh(team, port);
 852         __team_adjust_ops(team, team->en_port_count - 1);
 853         /*
 854          * Wait until readers see adjusted ops. This ensures that
 855          * readers never see team->en_port_count == 0
 856          */
 857         synchronize_rcu();
 858         team->en_port_count--;
 859 }
 860
 861 #define TEAM_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \
 862                             NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
 863                             NETIF_F_HIGHDMA | NETIF_F_LRO)
 864
 865 static void __team_compute_features(struct team *team)
 866 {
 867         struct team_port *port;
 868         u32 vlan_features = TEAM_VLAN_FEATURES;
 869         unsigned short max_hard_header_len = ETH_HLEN;
 870         unsigned int flags, dst_release_flag = IFF_XMIT_DST_RELEASE;
 871
 872         list_for_each_entry(port, &team->port_list, list) {
 873                 vlan_features = netdev_increment_features(vlan_features,
 874                                         port->dev->vlan_features,
 875                                         TEAM_VLAN_FEATURES);
 876
 877                 dst_release_flag &= port->dev->priv_flags;
 878                 if (port->dev->hard_header_len > max_hard_header_len)
 879                         max_hard_header_len = port->dev->hard_header_len;
 880         }
 881
 882         team->dev->vlan_features = vlan_features;
 883         team->dev->hard_header_len = max_hard_header_len;
 884
 885         flags = team->dev->priv_flags & ~IFF_XMIT_DST_RELEASE;
 886         team->dev->priv_flags = flags | dst_release_flag;
 887
 888         netdev_change_features(team->dev);
 889 }
 890
 891 static void team_compute_features(struct team *team)
 892 {
 893         mutex_lock(&team->lock);
 894         __team_compute_features(team);
 895         mutex_unlock(&team->lock);
 896 }
 897
 898 static int team_port_enter(struct team *team, struct team_port *port)
 899 {
 900         int err = 0;
 901
 902         dev_hold(team->dev);
 903         port->dev->priv_flags |= IFF_TEAM_PORT;
 904         if (team->ops.port_enter) {
 905                 err = team->ops.port_enter(team, port);
 906                 if (err) {
 907                         netdev_err(team->dev, "Device %s failed to enter team mode\n",
 908                                    port->dev->name);
 909                         goto err_port_enter;
 910                 }
 911         }
 912
 913         return 0;
 914
 915 err_port_enter:
 916         port->dev->priv_flags &= ~IFF_TEAM_PORT;
 917         dev_put(team->dev);
 918
 919         return err;
 920 }
 921
 922 static void team_port_leave(struct team *team, struct team_port *port)
 923 {
 924         if (team->ops.port_leave)
 925                 team->ops.port_leave(team, port);
 926         port->dev->priv_flags &= ~IFF_TEAM_PORT;
 927         dev_put(team->dev);
 928 }
 929
 930 #ifdef CONFIG_NET_POLL_CONTROLLER
 931 static int team_port_enable_netpoll(struct team *team, struct team_port *port,
 932                                     gfp_t gfp)
 933 {
 934         struct netpoll *np;
 935         int err;
 936
 937         np = kzalloc(sizeof(*np), gfp);
 938         if (!np)
 939                 return -ENOMEM;
 940
 941         err = __netpoll_setup(np, port->dev, gfp);
 942         if (err) {
 943                 kfree(np);
 944                 return err;
 945         }
 946         port->np = np;
 947         return err;
 948 }
 949
 950 static void team_port_disable_netpoll(struct team_port *port)
 951 {
 952         struct netpoll *np = port->np;
 953
 954         if (!np)
 955                 return;
 956         port->np = NULL;
 957
 958         /* Wait for transmitting packets to finish before freeing. */
 959         synchronize_rcu_bh();
 960         __netpoll_cleanup(np);
 961         kfree(np);
 962 }
 963
 964 static struct netpoll_info *team_netpoll_info(struct team *team)
 965 {
 966         return team->dev->npinfo;
 967 }
 968
 969 #else
 970 static int team_port_enable_netpoll(struct team *team, struct team_port *port,
 971                                     gfp_t gfp)
 972 {
 973         return 0;
 974 }
 975 static void team_port_disable_netpoll(struct team_port *port)
 976 {
 977 }
 978 static struct netpoll_info *team_netpoll_info(struct team *team)
 979 {
 980         return NULL;
 981 }
 982 #endif
 983
 984 static void __team_port_change_port_added(struct team_port *port, bool linkup);
 985 static int team_dev_type_check_change(struct net_device *dev,
 986                                       struct net_device *port_dev);
 987
 988 static int team_port_add(struct team *team, struct net_device *port_dev)
 989 {
 990         struct net_device *dev = team->dev;
 991         struct team_port *port;
 992         char *portname = port_dev->name;
 993         int err;
 994
 995         if (port_dev->flags & IFF_LOOPBACK) {
 996                 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
 997                            portname);
 998                 return -EINVAL;
 999         }
1000
1001         if (team_port_exists(port_dev)) {
1002                 netdev_err(dev, "Device %s is already a port "
1003                                 "of a team device\n", portname);
1004                 return -EBUSY;
1005         }
1006
1007         if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1008             vlan_uses_dev(dev)) {
1009                 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1010                            portname);
1011                 return -EPERM;
1012         }
1013
1014         err = team_dev_type_check_change(dev, port_dev);
1015         if (err)
1016                 return err;
1017
1018         if (port_dev->flags & IFF_UP) {
1019                 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1020                            portname);
1021                 return -EBUSY;
1022         }
1023
1024         port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1025                        GFP_KERNEL);
1026         if (!port)
1027                 return -ENOMEM;
1028
1029         port->dev = port_dev;
1030         port->team = team;
1031         INIT_LIST_HEAD(&port->qom_list);
1032
1033         port->orig.mtu = port_dev->mtu;
1034         err = dev_set_mtu(port_dev, dev->mtu);
1035         if (err) {
1036                 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1037                 goto err_set_mtu;
1038         }
1039
1040         memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1041
1042         err = team_port_enter(team, port);
1043         if (err) {
1044                 netdev_err(dev, "Device %s failed to enter team mode\n",
1045                            portname);
1046                 goto err_port_enter;
1047         }
1048
1049         err = dev_open(port_dev);
1050         if (err) {
1051                 netdev_dbg(dev, "Device %s opening failed\n",
1052                            portname);
1053                 goto err_dev_open;
1054         }
1055
1056         err = vlan_vids_add_by_dev(port_dev, dev);
1057         if (err) {
1058                 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1059                                 portname);
1060                 goto err_vids_add;
1061         }
1062
1063         if (team_netpoll_info(team)) {
1064                 err = team_port_enable_netpoll(team, port, GFP_KERNEL);
1065                 if (err) {
1066                         netdev_err(dev, "Failed to enable netpoll on device %s\n",
1067                                    portname);
1068                         goto err_enable_netpoll;
1069                 }
1070         }
1071
1072         err = netdev_master_upper_dev_link(port_dev, dev);
1073         if (err) {
1074                 netdev_err(dev, "Device %s failed to set upper link\n",
1075                            portname);
1076                 goto err_set_upper_link;
1077         }
1078
1079         err = netdev_rx_handler_register(port_dev, team_handle_frame,
1080                                          port);
1081         if (err) {
1082                 netdev_err(dev, "Device %s failed to register rx_handler\n",
1083                            portname);
1084                 goto err_handler_register;
1085         }
1086
1087         err = __team_option_inst_add_port(team, port);
1088         if (err) {
1089                 netdev_err(dev, "Device %s failed to add per-port options\n",
1090                            portname);
1091                 goto err_option_port_add;
1092         }
1093
1094         port->index = -1;
1095         team_port_enable(team, port);
1096         list_add_tail_rcu(&port->list, &team->port_list);
1097         __team_compute_features(team);
1098         __team_port_change_port_added(port, !!netif_carrier_ok(port_dev));
1099         __team_options_change_check(team);
1100
1101         netdev_info(dev, "Port device %s added\n", portname);
1102
1103         return 0;
1104
1105 err_option_port_add:
1106         netdev_rx_handler_unregister(port_dev);
1107
1108 err_handler_register:
1109         netdev_upper_dev_unlink(port_dev, dev);
1110
1111 err_set_upper_link:
1112         team_port_disable_netpoll(port);
1113
1114 err_enable_netpoll:
1115         vlan_vids_del_by_dev(port_dev, dev);
1116
1117 err_vids_add:
1118         dev_close(port_dev);
1119
1120 err_dev_open:
1121         team_port_leave(team, port);
1122         team_port_set_orig_dev_addr(port);
1123
1124 err_port_enter:
1125         dev_set_mtu(port_dev, port->orig.mtu);
1126
1127 err_set_mtu:
1128         kfree(port);
1129
1130         return err;
1131 }
1132
1133 static void __team_port_change_port_removed(struct team_port *port);
1134
1135 static int team_port_del(struct team *team, struct net_device *port_dev)
1136 {
1137         struct net_device *dev = team->dev;
1138         struct team_port *port;
1139         char *portname = port_dev->name;
1140
1141         port = team_port_get_rtnl(port_dev);
1142         if (!port || !team_port_find(team, port)) {
1143                 netdev_err(dev, "Device %s does not act as a port of this team\n",
1144                            portname);
1145                 return -ENOENT;
1146         }
1147
1148         team_port_disable(team, port);
1149         list_del_rcu(&port->list);
1150         netdev_rx_handler_unregister(port_dev);
1151         netdev_upper_dev_unlink(port_dev, dev);
1152         team_port_disable_netpoll(port);
1153         vlan_vids_del_by_dev(port_dev, dev);
1154         dev_uc_unsync(port_dev, dev);
1155         dev_mc_unsync(port_dev, dev);
1156         dev_close(port_dev);
1157         team_port_leave(team, port);
1158
1159         __team_option_inst_mark_removed_port(team, port);
1160         __team_options_change_check(team);
1161         __team_option_inst_del_port(team, port);
1162         __team_port_change_port_removed(port);
1163
1164         team_port_set_orig_dev_addr(port);
1165         dev_set_mtu(port_dev, port->orig.mtu);
1166         synchronize_rcu();
1167         kfree(port);
1168         netdev_info(dev, "Port device %s removed\n", portname);
1169         __team_compute_features(team);
1170
1171         return 0;
1172 }
1173
1174
1175 /*****************
1176  * Net device ops
1177  *****************/
1178
1179 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1180 {
1181         ctx->data.str_val = team->mode->kind;
1182         return 0;
1183 }
1184
1185 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1186 {
1187         return team_change_mode(team, ctx->data.str_val);
1188 }
1189
1190 static int team_port_en_option_get(struct team *team,
1191                                    struct team_gsetter_ctx *ctx)
1192 {
1193         struct team_port *port = ctx->info->port;
1194
1195         ctx->data.bool_val = team_port_enabled(port);
1196         return 0;
1197 }
1198
1199 static int team_port_en_option_set(struct team *team,
1200                                    struct team_gsetter_ctx *ctx)
1201 {
1202         struct team_port *port = ctx->info->port;
1203
1204         if (ctx->data.bool_val)
1205                 team_port_enable(team, port);
1206         else
1207                 team_port_disable(team, port);
1208         return 0;
1209 }
1210
1211 static int team_user_linkup_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;
1217         return 0;
1218 }
1219
1220 static int team_user_linkup_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 = ctx->data.bool_val;
1226         team_refresh_port_linkup(port);
1227         return 0;
1228 }
1229
1230 static int team_user_linkup_en_option_get(struct team *team,
1231                                           struct team_gsetter_ctx *ctx)
1232 {
1233         struct team_port *port = ctx->info->port;
1234
1235         ctx->data.bool_val = port->user.linkup_enabled;
1236         return 0;
1237 }
1238
1239 static int team_user_linkup_en_option_set(struct team *team,
1240                                           struct team_gsetter_ctx *ctx)
1241 {
1242         struct team_port *port = ctx->info->port;
1243
1244         port->user.linkup_enabled = ctx->data.bool_val;
1245         team_refresh_port_linkup(port);
1246         return 0;
1247 }
1248
1249 static int team_priority_option_get(struct team *team,
1250                                     struct team_gsetter_ctx *ctx)
1251 {
1252         struct team_port *port = ctx->info->port;
1253
1254         ctx->data.s32_val = port->priority;
1255         return 0;
1256 }
1257
1258 static int team_priority_option_set(struct team *team,
1259                                     struct team_gsetter_ctx *ctx)
1260 {
1261         struct team_port *port = ctx->info->port;
1262
1263         port->priority = ctx->data.s32_val;
1264         team_queue_override_port_refresh(team, port);
1265         return 0;
1266 }
1267
1268 static int team_queue_id_option_get(struct team *team,
1269                                     struct team_gsetter_ctx *ctx)
1270 {
1271         struct team_port *port = ctx->info->port;
1272
1273         ctx->data.u32_val = port->queue_id;
1274         return 0;
1275 }
1276
1277 static int team_queue_id_option_set(struct team *team,
1278                                     struct team_gsetter_ctx *ctx)
1279 {
1280         struct team_port *port = ctx->info->port;
1281
1282         if (port->queue_id == ctx->data.u32_val)
1283                 return 0;
1284         if (ctx->data.u32_val >= team->dev->real_num_tx_queues)
1285                 return -EINVAL;
1286         port->queue_id = ctx->data.u32_val;
1287         team_queue_override_port_refresh(team, port);
1288         return 0;
1289 }
1290
1291
1292 static const struct team_option team_options[] = {
1293         {
1294                 .name = "mode",
1295                 .type = TEAM_OPTION_TYPE_STRING,
1296                 .getter = team_mode_option_get,
1297                 .setter = team_mode_option_set,
1298         },
1299         {
1300                 .name = "enabled",
1301                 .type = TEAM_OPTION_TYPE_BOOL,
1302                 .per_port = true,
1303                 .getter = team_port_en_option_get,
1304                 .setter = team_port_en_option_set,
1305         },
1306         {
1307                 .name = "user_linkup",
1308                 .type = TEAM_OPTION_TYPE_BOOL,
1309                 .per_port = true,
1310                 .getter = team_user_linkup_option_get,
1311                 .setter = team_user_linkup_option_set,
1312         },
1313         {
1314                 .name = "user_linkup_enabled",
1315                 .type = TEAM_OPTION_TYPE_BOOL,
1316                 .per_port = true,
1317                 .getter = team_user_linkup_en_option_get,
1318                 .setter = team_user_linkup_en_option_set,
1319         },
1320         {
1321                 .name = "priority",
1322                 .type = TEAM_OPTION_TYPE_S32,
1323                 .per_port = true,
1324                 .getter = team_priority_option_get,
1325                 .setter = team_priority_option_set,
1326         },
1327         {
1328                 .name = "queue_id",
1329                 .type = TEAM_OPTION_TYPE_U32,
1330                 .per_port = true,
1331                 .getter = team_queue_id_option_get,
1332                 .setter = team_queue_id_option_set,
1333         },
1334 };
1335
1336 static struct lock_class_key team_netdev_xmit_lock_key;
1337 static struct lock_class_key team_netdev_addr_lock_key;
1338 static struct lock_class_key team_tx_busylock_key;
1339
1340 static void team_set_lockdep_class_one(struct net_device *dev,
1341                                        struct netdev_queue *txq,
1342                                        void *unused)
1343 {
1344         lockdep_set_class(&txq->_xmit_lock, &team_netdev_xmit_lock_key);
1345 }
1346
1347 static void team_set_lockdep_class(struct net_device *dev)
1348 {
1349         lockdep_set_class(&dev->addr_list_lock, &team_netdev_addr_lock_key);
1350         netdev_for_each_tx_queue(dev, team_set_lockdep_class_one, NULL);
1351         dev->qdisc_tx_busylock = &team_tx_busylock_key;
1352 }
1353
1354 static int team_init(struct net_device *dev)
1355 {
1356         struct team *team = netdev_priv(dev);
1357         int i;
1358         int err;
1359
1360         team->dev = dev;
1361         mutex_init(&team->lock);
1362         team_set_no_mode(team);
1363
1364         team->pcpu_stats = alloc_percpu(struct team_pcpu_stats);
1365         if (!team->pcpu_stats)
1366                 return -ENOMEM;
1367
1368         for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1369                 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1370         INIT_LIST_HEAD(&team->port_list);
1371         err = team_queue_override_init(team);
1372         if (err)
1373                 goto err_team_queue_override_init;
1374
1375         team_adjust_ops(team);
1376
1377         INIT_LIST_HEAD(&team->option_list);
1378         INIT_LIST_HEAD(&team->option_inst_list);
1379         err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1380         if (err)
1381                 goto err_options_register;
1382         netif_carrier_off(dev);
1383
1384         team_set_lockdep_class(dev);
1385
1386         return 0;
1387
1388 err_options_register:
1389         team_queue_override_fini(team);
1390 err_team_queue_override_init:
1391         free_percpu(team->pcpu_stats);
1392
1393         return err;
1394 }
1395
1396 static void team_uninit(struct net_device *dev)
1397 {
1398         struct team *team = netdev_priv(dev);
1399         struct team_port *port;
1400         struct team_port *tmp;
1401
1402         mutex_lock(&team->lock);
1403         list_for_each_entry_safe(port, tmp, &team->port_list, list)
1404                 team_port_del(team, port->dev);
1405
1406         __team_change_mode(team, NULL); /* cleanup */
1407         __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1408         team_queue_override_fini(team);
1409         mutex_unlock(&team->lock);
1410 }
1411
1412 static void team_destructor(struct net_device *dev)
1413 {
1414         struct team *team = netdev_priv(dev);
1415
1416         free_percpu(team->pcpu_stats);
1417         free_netdev(dev);
1418 }
1419
1420 static int team_open(struct net_device *dev)
1421 {
1422         return 0;
1423 }
1424
1425 static int team_close(struct net_device *dev)
1426 {
1427         return 0;
1428 }
1429
1430 /*
1431  * note: already called with rcu_read_lock
1432  */
1433 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1434 {
1435         struct team *team = netdev_priv(dev);
1436         bool tx_success;
1437         unsigned int len = skb->len;
1438
1439         tx_success = team_queue_override_transmit(team, skb);
1440         if (!tx_success)
1441                 tx_success = team->ops.transmit(team, skb);
1442         if (tx_success) {
1443                 struct team_pcpu_stats *pcpu_stats;
1444
1445                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1446                 u64_stats_update_begin(&pcpu_stats->syncp);
1447                 pcpu_stats->tx_packets++;
1448                 pcpu_stats->tx_bytes += len;
1449                 u64_stats_update_end(&pcpu_stats->syncp);
1450         } else {
1451                 this_cpu_inc(team->pcpu_stats->tx_dropped);
1452         }
1453
1454         return NETDEV_TX_OK;
1455 }
1456
1457 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb)
1458 {
1459         /*
1460          * This helper function exists to help dev_pick_tx get the correct
1461          * destination queue.  Using a helper function skips a call to
1462          * skb_tx_hash and will put the skbs in the queue we expect on their
1463          * way down to the team driver.
1464          */
1465         u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1466
1467         /*
1468          * Save the original txq to restore before passing to the driver
1469          */
1470         qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1471
1472         if (unlikely(txq >= dev->real_num_tx_queues)) {
1473                 do {
1474                         txq -= dev->real_num_tx_queues;
1475                 } while (txq >= dev->real_num_tx_queues);
1476         }
1477         return txq;
1478 }
1479
1480 static void team_change_rx_flags(struct net_device *dev, int change)
1481 {
1482         struct team *team = netdev_priv(dev);
1483         struct team_port *port;
1484         int inc;
1485
1486         rcu_read_lock();
1487         list_for_each_entry_rcu(port, &team->port_list, list) {
1488                 if (change & IFF_PROMISC) {
1489                         inc = dev->flags & IFF_PROMISC ? 1 : -1;
1490                         dev_set_promiscuity(port->dev, inc);
1491                 }
1492                 if (change & IFF_ALLMULTI) {
1493                         inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1494                         dev_set_allmulti(port->dev, inc);
1495                 }
1496         }
1497         rcu_read_unlock();
1498 }
1499
1500 static void team_set_rx_mode(struct net_device *dev)
1501 {
1502         struct team *team = netdev_priv(dev);
1503         struct team_port *port;
1504
1505         rcu_read_lock();
1506         list_for_each_entry_rcu(port, &team->port_list, list) {
1507                 dev_uc_sync_multiple(port->dev, dev);
1508                 dev_mc_sync_multiple(port->dev, dev);
1509         }
1510         rcu_read_unlock();
1511 }
1512
1513 static int team_set_mac_address(struct net_device *dev, void *p)
1514 {
1515         struct sockaddr *addr = p;
1516         struct team *team = netdev_priv(dev);
1517         struct team_port *port;
1518
1519         if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1520                 return -EADDRNOTAVAIL;
1521         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1522         rcu_read_lock();
1523         list_for_each_entry_rcu(port, &team->port_list, list)
1524                 if (team->ops.port_change_dev_addr)
1525                         team->ops.port_change_dev_addr(team, port);
1526         rcu_read_unlock();
1527         return 0;
1528 }
1529
1530 static int team_change_mtu(struct net_device *dev, int new_mtu)
1531 {
1532         struct team *team = netdev_priv(dev);
1533         struct team_port *port;
1534         int err;
1535
1536         /*
1537          * Alhough this is reader, it's guarded by team lock. It's not possible
1538          * to traverse list in reverse under rcu_read_lock
1539          */
1540         mutex_lock(&team->lock);
1541         list_for_each_entry(port, &team->port_list, list) {
1542                 err = dev_set_mtu(port->dev, new_mtu);
1543                 if (err) {
1544                         netdev_err(dev, "Device %s failed to change mtu",
1545                                    port->dev->name);
1546                         goto unwind;
1547                 }
1548         }
1549         mutex_unlock(&team->lock);
1550
1551         dev->mtu = new_mtu;
1552
1553         return 0;
1554
1555 unwind:
1556         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1557                 dev_set_mtu(port->dev, dev->mtu);
1558         mutex_unlock(&team->lock);
1559
1560         return err;
1561 }
1562
1563 static struct rtnl_link_stats64 *
1564 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1565 {
1566         struct team *team = netdev_priv(dev);
1567         struct team_pcpu_stats *p;
1568         u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1569         u32 rx_dropped = 0, tx_dropped = 0;
1570         unsigned int start;
1571         int i;
1572
1573         for_each_possible_cpu(i) {
1574                 p = per_cpu_ptr(team->pcpu_stats, i);
1575                 do {
1576                         start = u64_stats_fetch_begin_bh(&p->syncp);
1577                         rx_packets      = p->rx_packets;
1578                         rx_bytes        = p->rx_bytes;
1579                         rx_multicast    = p->rx_multicast;
1580                         tx_packets      = p->tx_packets;
1581                         tx_bytes        = p->tx_bytes;
1582                 } while (u64_stats_fetch_retry_bh(&p->syncp, start));
1583
1584                 stats->rx_packets       += rx_packets;
1585                 stats->rx_bytes         += rx_bytes;
1586                 stats->multicast        += rx_multicast;
1587                 stats->tx_packets       += tx_packets;
1588                 stats->tx_bytes         += tx_bytes;
1589                 /*
1590                  * rx_dropped & tx_dropped are u32, updated
1591                  * without syncp protection.
1592                  */
1593                 rx_dropped      += p->rx_dropped;
1594                 tx_dropped      += p->tx_dropped;
1595         }
1596         stats->rx_dropped       = rx_dropped;
1597         stats->tx_dropped       = tx_dropped;
1598         return stats;
1599 }
1600
1601 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1602 {
1603         struct team *team = netdev_priv(dev);
1604         struct team_port *port;
1605         int err;
1606
1607         /*
1608          * Alhough this is reader, it's guarded by team lock. It's not possible
1609          * to traverse list in reverse under rcu_read_lock
1610          */
1611         mutex_lock(&team->lock);
1612         list_for_each_entry(port, &team->port_list, list) {
1613                 err = vlan_vid_add(port->dev, proto, vid);
1614                 if (err)
1615                         goto unwind;
1616         }
1617         mutex_unlock(&team->lock);
1618
1619         return 0;
1620
1621 unwind:
1622         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1623                 vlan_vid_del(port->dev, proto, vid);
1624         mutex_unlock(&team->lock);
1625
1626         return err;
1627 }
1628
1629 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1630 {
1631         struct team *team = netdev_priv(dev);
1632         struct team_port *port;
1633
1634         rcu_read_lock();
1635         list_for_each_entry_rcu(port, &team->port_list, list)
1636                 vlan_vid_del(port->dev, proto, vid);
1637         rcu_read_unlock();
1638
1639         return 0;
1640 }
1641
1642 #ifdef CONFIG_NET_POLL_CONTROLLER
1643 static void team_poll_controller(struct net_device *dev)
1644 {
1645 }
1646
1647 static void __team_netpoll_cleanup(struct team *team)
1648 {
1649         struct team_port *port;
1650
1651         list_for_each_entry(port, &team->port_list, list)
1652                 team_port_disable_netpoll(port);
1653 }
1654
1655 static void team_netpoll_cleanup(struct net_device *dev)
1656 {
1657         struct team *team = netdev_priv(dev);
1658
1659         mutex_lock(&team->lock);
1660         __team_netpoll_cleanup(team);
1661         mutex_unlock(&team->lock);
1662 }
1663
1664 static int team_netpoll_setup(struct net_device *dev,
1665                               struct netpoll_info *npifo, gfp_t gfp)
1666 {
1667         struct team *team = netdev_priv(dev);
1668         struct team_port *port;
1669         int err = 0;
1670
1671         mutex_lock(&team->lock);
1672         list_for_each_entry(port, &team->port_list, list) {
1673                 err = team_port_enable_netpoll(team, port, gfp);
1674                 if (err) {
1675                         __team_netpoll_cleanup(team);
1676                         break;
1677                 }
1678         }
1679         mutex_unlock(&team->lock);
1680         return err;
1681 }
1682 #endif
1683
1684 static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
1685 {
1686         struct team *team = netdev_priv(dev);
1687         int err;
1688
1689         mutex_lock(&team->lock);
1690         err = team_port_add(team, port_dev);
1691         mutex_unlock(&team->lock);
1692         return err;
1693 }
1694
1695 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1696 {
1697         struct team *team = netdev_priv(dev);
1698         int err;
1699
1700         mutex_lock(&team->lock);
1701         err = team_port_del(team, port_dev);
1702         mutex_unlock(&team->lock);
1703         return err;
1704 }
1705
1706 static netdev_features_t team_fix_features(struct net_device *dev,
1707                                            netdev_features_t features)
1708 {
1709         struct team_port *port;
1710         struct team *team = netdev_priv(dev);
1711         netdev_features_t mask;
1712
1713         mask = features;
1714         features &= ~NETIF_F_ONE_FOR_ALL;
1715         features |= NETIF_F_ALL_FOR_ALL;
1716
1717         rcu_read_lock();
1718         list_for_each_entry_rcu(port, &team->port_list, list) {
1719                 features = netdev_increment_features(features,
1720                                                      port->dev->features,
1721                                                      mask);
1722         }
1723         rcu_read_unlock();
1724         return features;
1725 }
1726
1727 static int team_change_carrier(struct net_device *dev, bool new_carrier)
1728 {
1729         struct team *team = netdev_priv(dev);
1730
1731         team->user_carrier_enabled = true;
1732
1733         if (new_carrier)
1734                 netif_carrier_on(dev);
1735         else
1736                 netif_carrier_off(dev);
1737         return 0;
1738 }
1739
1740 static const struct net_device_ops team_netdev_ops = {
1741         .ndo_init               = team_init,
1742         .ndo_uninit             = team_uninit,
1743         .ndo_open               = team_open,
1744         .ndo_stop               = team_close,
1745         .ndo_start_xmit         = team_xmit,
1746         .ndo_select_queue       = team_select_queue,
1747         .ndo_change_rx_flags    = team_change_rx_flags,
1748         .ndo_set_rx_mode        = team_set_rx_mode,
1749         .ndo_set_mac_address    = team_set_mac_address,
1750         .ndo_change_mtu         = team_change_mtu,
1751         .ndo_get_stats64        = team_get_stats64,
1752         .ndo_vlan_rx_add_vid    = team_vlan_rx_add_vid,
1753         .ndo_vlan_rx_kill_vid   = team_vlan_rx_kill_vid,
1754 #ifdef CONFIG_NET_POLL_CONTROLLER
1755         .ndo_poll_controller    = team_poll_controller,
1756         .ndo_netpoll_setup      = team_netpoll_setup,
1757         .ndo_netpoll_cleanup    = team_netpoll_cleanup,
1758 #endif
1759         .ndo_add_slave          = team_add_slave,
1760         .ndo_del_slave          = team_del_slave,
1761         .ndo_fix_features       = team_fix_features,
1762         .ndo_change_carrier     = team_change_carrier,
1763 };
1764
1765 /***********************
1766  * ethtool interface
1767  ***********************/
1768
1769 static void team_ethtool_get_drvinfo(struct net_device *dev,
1770                                      struct ethtool_drvinfo *drvinfo)
1771 {
1772         strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
1773         strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
1774 }
1775
1776 static const struct ethtool_ops team_ethtool_ops = {
1777         .get_drvinfo            = team_ethtool_get_drvinfo,
1778         .get_link               = ethtool_op_get_link,
1779 };
1780
1781 /***********************
1782  * rt netlink interface
1783  ***********************/
1784
1785 static void team_setup_by_port(struct net_device *dev,
1786                                struct net_device *port_dev)
1787 {
1788         dev->header_ops = port_dev->header_ops;
1789         dev->type = port_dev->type;
1790         dev->hard_header_len = port_dev->hard_header_len;
1791         dev->addr_len = port_dev->addr_len;
1792         dev->mtu = port_dev->mtu;
1793         memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
1794         memcpy(dev->dev_addr, port_dev->dev_addr, port_dev->addr_len);
1795 }
1796
1797 static int team_dev_type_check_change(struct net_device *dev,
1798                                       struct net_device *port_dev)
1799 {
1800         struct team *team = netdev_priv(dev);
1801         char *portname = port_dev->name;
1802         int err;
1803
1804         if (dev->type == port_dev->type)
1805                 return 0;
1806         if (!list_empty(&team->port_list)) {
1807                 netdev_err(dev, "Device %s is of different type\n", portname);
1808                 return -EBUSY;
1809         }
1810         err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
1811         err = notifier_to_errno(err);
1812         if (err) {
1813                 netdev_err(dev, "Refused to change device type\n");
1814                 return err;
1815         }
1816         dev_uc_flush(dev);
1817         dev_mc_flush(dev);
1818         team_setup_by_port(dev, port_dev);
1819         call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
1820         return 0;
1821 }
1822
1823 static void team_setup(struct net_device *dev)
1824 {
1825         ether_setup(dev);
1826
1827         dev->netdev_ops = &team_netdev_ops;
1828         dev->ethtool_ops = &team_ethtool_ops;
1829         dev->destructor = team_destructor;
1830         dev->tx_queue_len = 0;
1831         dev->flags |= IFF_MULTICAST;
1832         dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
1833
1834         /*
1835          * Indicate we support unicast address filtering. That way core won't
1836          * bring us to promisc mode in case a unicast addr is added.
1837          * Let this up to underlay drivers.
1838          */
1839         dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
1840
1841         dev->features |= NETIF_F_LLTX;
1842         dev->features |= NETIF_F_GRO;
1843         dev->hw_features = TEAM_VLAN_FEATURES |
1844                            NETIF_F_HW_VLAN_CTAG_TX |
1845                            NETIF_F_HW_VLAN_CTAG_RX |
1846                            NETIF_F_HW_VLAN_CTAG_FILTER;
1847
1848         dev->hw_features &= ~(NETIF_F_ALL_CSUM & ~NETIF_F_HW_CSUM);
1849         dev->features |= dev->hw_features;
1850 }
1851
1852 static int team_newlink(struct net *src_net, struct net_device *dev,
1853                         struct nlattr *tb[], struct nlattr *data[])
1854 {
1855         int err;
1856
1857         if (tb[IFLA_ADDRESS] == NULL)
1858                 eth_hw_addr_random(dev);
1859
1860         err = register_netdevice(dev);
1861         if (err)
1862                 return err;
1863
1864         return 0;
1865 }
1866
1867 static int team_validate(struct nlattr *tb[], struct nlattr *data[])
1868 {
1869         if (tb[IFLA_ADDRESS]) {
1870                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
1871                         return -EINVAL;
1872                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
1873                         return -EADDRNOTAVAIL;
1874         }
1875         return 0;
1876 }
1877
1878 static unsigned int team_get_num_tx_queues(void)
1879 {
1880         return TEAM_DEFAULT_NUM_TX_QUEUES;
1881 }
1882
1883 static unsigned int team_get_num_rx_queues(void)
1884 {
1885         return TEAM_DEFAULT_NUM_RX_QUEUES;
1886 }
1887
1888 static struct rtnl_link_ops team_link_ops __read_mostly = {
1889         .kind                   = DRV_NAME,
1890         .priv_size              = sizeof(struct team),
1891         .setup                  = team_setup,
1892         .newlink                = team_newlink,
1893         .validate               = team_validate,
1894         .get_num_tx_queues      = team_get_num_tx_queues,
1895         .get_num_rx_queues      = team_get_num_rx_queues,
1896 };
1897
1898
1899 /***********************************
1900  * Generic netlink custom interface
1901  ***********************************/
1902
1903 static struct genl_family team_nl_family = {
1904         .id             = GENL_ID_GENERATE,
1905         .name           = TEAM_GENL_NAME,
1906         .version        = TEAM_GENL_VERSION,
1907         .maxattr        = TEAM_ATTR_MAX,
1908         .netnsok        = true,
1909 };
1910
1911 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
1912         [TEAM_ATTR_UNSPEC]                      = { .type = NLA_UNSPEC, },
1913         [TEAM_ATTR_TEAM_IFINDEX]                = { .type = NLA_U32 },
1914         [TEAM_ATTR_LIST_OPTION]                 = { .type = NLA_NESTED },
1915         [TEAM_ATTR_LIST_PORT]                   = { .type = NLA_NESTED },
1916 };
1917
1918 static const struct nla_policy
1919 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
1920         [TEAM_ATTR_OPTION_UNSPEC]               = { .type = NLA_UNSPEC, },
1921         [TEAM_ATTR_OPTION_NAME] = {
1922                 .type = NLA_STRING,
1923                 .len = TEAM_STRING_MAX_LEN,
1924         },
1925         [TEAM_ATTR_OPTION_CHANGED]              = { .type = NLA_FLAG },
1926         [TEAM_ATTR_OPTION_TYPE]                 = { .type = NLA_U8 },
1927         [TEAM_ATTR_OPTION_DATA]                 = { .type = NLA_BINARY },
1928 };
1929
1930 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
1931 {
1932         struct sk_buff *msg;
1933         void *hdr;
1934         int err;
1935
1936         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1937         if (!msg)
1938                 return -ENOMEM;
1939
1940         hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
1941                           &team_nl_family, 0, TEAM_CMD_NOOP);
1942         if (!hdr) {
1943                 err = -EMSGSIZE;
1944                 goto err_msg_put;
1945         }
1946
1947         genlmsg_end(msg, hdr);
1948
1949         return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
1950
1951 err_msg_put:
1952         nlmsg_free(msg);
1953
1954         return err;
1955 }
1956
1957 /*
1958  * Netlink cmd functions should be locked by following two functions.
1959  * Since dev gets held here, that ensures dev won't disappear in between.
1960  */
1961 static struct team *team_nl_team_get(struct genl_info *info)
1962 {
1963         struct net *net = genl_info_net(info);
1964         int ifindex;
1965         struct net_device *dev;
1966         struct team *team;
1967
1968         if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
1969                 return NULL;
1970
1971         ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
1972         dev = dev_get_by_index(net, ifindex);
1973         if (!dev || dev->netdev_ops != &team_netdev_ops) {
1974                 if (dev)
1975                         dev_put(dev);
1976                 return NULL;
1977         }
1978
1979         team = netdev_priv(dev);
1980         mutex_lock(&team->lock);
1981         return team;
1982 }
1983
1984 static void team_nl_team_put(struct team *team)
1985 {
1986         mutex_unlock(&team->lock);
1987         dev_put(team->dev);
1988 }
1989
1990 typedef int team_nl_send_func_t(struct sk_buff *skb,
1991                                 struct team *team, u32 portid);
1992
1993 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
1994 {
1995         return genlmsg_unicast(dev_net(team->dev), skb, portid);
1996 }
1997
1998 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
1999                                        struct team_option_inst *opt_inst)
2000 {
2001         struct nlattr *option_item;
2002         struct team_option *option = opt_inst->option;
2003         struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2004         struct team_gsetter_ctx ctx;
2005         int err;
2006
2007         ctx.info = opt_inst_info;
2008         err = team_option_get(team, opt_inst, &ctx);
2009         if (err)
2010                 return err;
2011
2012         option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
2013         if (!option_item)
2014                 return -EMSGSIZE;
2015
2016         if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2017                 goto nest_cancel;
2018         if (opt_inst_info->port &&
2019             nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2020                         opt_inst_info->port->dev->ifindex))
2021                 goto nest_cancel;
2022         if (opt_inst->option->array_size &&
2023             nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2024                         opt_inst_info->array_index))
2025                 goto nest_cancel;
2026
2027         switch (option->type) {
2028         case TEAM_OPTION_TYPE_U32:
2029                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2030                         goto nest_cancel;
2031                 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2032                         goto nest_cancel;
2033                 break;
2034         case TEAM_OPTION_TYPE_STRING:
2035                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2036                         goto nest_cancel;
2037                 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2038                                    ctx.data.str_val))
2039                         goto nest_cancel;
2040                 break;
2041         case TEAM_OPTION_TYPE_BINARY:
2042                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2043                         goto nest_cancel;
2044                 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2045                             ctx.data.bin_val.ptr))
2046                         goto nest_cancel;
2047                 break;
2048         case TEAM_OPTION_TYPE_BOOL:
2049                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2050                         goto nest_cancel;
2051                 if (ctx.data.bool_val &&
2052                     nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2053                         goto nest_cancel;
2054                 break;
2055         case TEAM_OPTION_TYPE_S32:
2056                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2057                         goto nest_cancel;
2058                 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2059                         goto nest_cancel;
2060                 break;
2061         default:
2062                 BUG();
2063         }
2064         if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2065                 goto nest_cancel;
2066         if (opt_inst->changed) {
2067                 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2068                         goto nest_cancel;
2069                 opt_inst->changed = false;
2070         }
2071         nla_nest_end(skb, option_item);
2072         return 0;
2073
2074 nest_cancel:
2075         nla_nest_cancel(skb, option_item);
2076         return -EMSGSIZE;
2077 }
2078
2079 static int __send_and_alloc_skb(struct sk_buff **pskb,
2080                                 struct team *team, u32 portid,
2081                                 team_nl_send_func_t *send_func)
2082 {
2083         int err;
2084
2085         if (*pskb) {
2086                 err = send_func(*pskb, team, portid);
2087                 if (err)
2088                         return err;
2089         }
2090         *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2091         if (!*pskb)
2092                 return -ENOMEM;
2093         return 0;
2094 }
2095
2096 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2097                                     int flags, team_nl_send_func_t *send_func,
2098                                     struct list_head *sel_opt_inst_list)
2099 {
2100         struct nlattr *option_list;
2101         struct nlmsghdr *nlh;
2102         void *hdr;
2103         struct team_option_inst *opt_inst;
2104         int err;
2105         struct sk_buff *skb = NULL;
2106         bool incomplete;
2107         int i;
2108
2109         opt_inst = list_first_entry(sel_opt_inst_list,
2110                                     struct team_option_inst, tmp_list);
2111
2112 start_again:
2113         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2114         if (err)
2115                 return err;
2116
2117         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2118                           TEAM_CMD_OPTIONS_GET);
2119         if (!hdr)
2120                 return -EMSGSIZE;
2121
2122         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2123                 goto nla_put_failure;
2124         option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2125         if (!option_list)
2126                 goto nla_put_failure;
2127
2128         i = 0;
2129         incomplete = false;
2130         list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2131                 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2132                 if (err) {
2133                         if (err == -EMSGSIZE) {
2134                                 if (!i)
2135                                         goto errout;
2136                                 incomplete = true;
2137                                 break;
2138                         }
2139                         goto errout;
2140                 }
2141                 i++;
2142         }
2143
2144         nla_nest_end(skb, option_list);
2145         genlmsg_end(skb, hdr);
2146         if (incomplete)
2147                 goto start_again;
2148
2149 send_done:
2150         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2151         if (!nlh) {
2152                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2153                 if (err)
2154                         goto errout;
2155                 goto send_done;
2156         }
2157
2158         return send_func(skb, team, portid);
2159
2160 nla_put_failure:
2161         err = -EMSGSIZE;
2162 errout:
2163         genlmsg_cancel(skb, hdr);
2164         nlmsg_free(skb);
2165         return err;
2166 }
2167
2168 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2169 {
2170         struct team *team;
2171         struct team_option_inst *opt_inst;
2172         int err;
2173         LIST_HEAD(sel_opt_inst_list);
2174
2175         team = team_nl_team_get(info);
2176         if (!team)
2177                 return -EINVAL;
2178
2179         list_for_each_entry(opt_inst, &team->option_inst_list, list)
2180                 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2181         err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2182                                        NLM_F_ACK, team_nl_send_unicast,
2183                                        &sel_opt_inst_list);
2184
2185         team_nl_team_put(team);
2186
2187         return err;
2188 }
2189
2190 static int team_nl_send_event_options_get(struct team *team,
2191                                           struct list_head *sel_opt_inst_list);
2192
2193 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2194 {
2195         struct team *team;
2196         int err = 0;
2197         int i;
2198         struct nlattr *nl_option;
2199         LIST_HEAD(opt_inst_list);
2200
2201         team = team_nl_team_get(info);
2202         if (!team)
2203                 return -EINVAL;
2204
2205         err = -EINVAL;
2206         if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2207                 err = -EINVAL;
2208                 goto team_put;
2209         }
2210
2211         nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2212                 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2213                 struct nlattr *attr;
2214                 struct nlattr *attr_data;
2215                 enum team_option_type opt_type;
2216                 int opt_port_ifindex = 0; /* != 0 for per-port options */
2217                 u32 opt_array_index = 0;
2218                 bool opt_is_array = false;
2219                 struct team_option_inst *opt_inst;
2220                 char *opt_name;
2221                 bool opt_found = false;
2222
2223                 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2224                         err = -EINVAL;
2225                         goto team_put;
2226                 }
2227                 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2228                                        nl_option, team_nl_option_policy);
2229                 if (err)
2230                         goto team_put;
2231                 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2232                     !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2233                         err = -EINVAL;
2234                         goto team_put;
2235                 }
2236                 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2237                 case NLA_U32:
2238                         opt_type = TEAM_OPTION_TYPE_U32;
2239                         break;
2240                 case NLA_STRING:
2241                         opt_type = TEAM_OPTION_TYPE_STRING;
2242                         break;
2243                 case NLA_BINARY:
2244                         opt_type = TEAM_OPTION_TYPE_BINARY;
2245                         break;
2246                 case NLA_FLAG:
2247                         opt_type = TEAM_OPTION_TYPE_BOOL;
2248                         break;
2249                 case NLA_S32:
2250                         opt_type = TEAM_OPTION_TYPE_S32;
2251                         break;
2252                 default:
2253                         goto team_put;
2254                 }
2255
2256                 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2257                 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2258                         err = -EINVAL;
2259                         goto team_put;
2260                 }
2261
2262                 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2263                 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2264                 if (attr)
2265                         opt_port_ifindex = nla_get_u32(attr);
2266
2267                 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2268                 if (attr) {
2269                         opt_is_array = true;
2270                         opt_array_index = nla_get_u32(attr);
2271                 }
2272
2273                 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2274                         struct team_option *option = opt_inst->option;
2275                         struct team_gsetter_ctx ctx;
2276                         struct team_option_inst_info *opt_inst_info;
2277                         int tmp_ifindex;
2278
2279                         opt_inst_info = &opt_inst->info;
2280                         tmp_ifindex = opt_inst_info->port ?
2281                                       opt_inst_info->port->dev->ifindex : 0;
2282                         if (option->type != opt_type ||
2283                             strcmp(option->name, opt_name) ||
2284                             tmp_ifindex != opt_port_ifindex ||
2285                             (option->array_size && !opt_is_array) ||
2286                             opt_inst_info->array_index != opt_array_index)
2287                                 continue;
2288                         opt_found = true;
2289                         ctx.info = opt_inst_info;
2290                         switch (opt_type) {
2291                         case TEAM_OPTION_TYPE_U32:
2292                                 ctx.data.u32_val = nla_get_u32(attr_data);
2293                                 break;
2294                         case TEAM_OPTION_TYPE_STRING:
2295                                 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2296                                         err = -EINVAL;
2297                                         goto team_put;
2298                                 }
2299                                 ctx.data.str_val = nla_data(attr_data);
2300                                 break;
2301                         case TEAM_OPTION_TYPE_BINARY:
2302                                 ctx.data.bin_val.len = nla_len(attr_data);
2303                                 ctx.data.bin_val.ptr = nla_data(attr_data);
2304                                 break;
2305                         case TEAM_OPTION_TYPE_BOOL:
2306                                 ctx.data.bool_val = attr_data ? true : false;
2307                                 break;
2308                         case TEAM_OPTION_TYPE_S32:
2309                                 ctx.data.s32_val = nla_get_s32(attr_data);
2310                                 break;
2311                         default:
2312                                 BUG();
2313                         }
2314                         err = team_option_set(team, opt_inst, &ctx);
2315                         if (err)
2316                                 goto team_put;
2317                         opt_inst->changed = true;
2318                         list_add(&opt_inst->tmp_list, &opt_inst_list);
2319                 }
2320                 if (!opt_found) {
2321                         err = -ENOENT;
2322                         goto team_put;
2323                 }
2324         }
2325
2326         err = team_nl_send_event_options_get(team, &opt_inst_list);
2327
2328 team_put:
2329         team_nl_team_put(team);
2330
2331         return err;
2332 }
2333
2334 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2335                                      struct team_port *port)
2336 {
2337         struct nlattr *port_item;
2338
2339         port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2340         if (!port_item)
2341                 goto nest_cancel;
2342         if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2343                 goto nest_cancel;
2344         if (port->changed) {
2345                 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2346                         goto nest_cancel;
2347                 port->changed = false;
2348         }
2349         if ((port->removed &&
2350              nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2351             (port->state.linkup &&
2352              nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2353             nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2354             nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2355                 goto nest_cancel;
2356         nla_nest_end(skb, port_item);
2357         return 0;
2358
2359 nest_cancel:
2360         nla_nest_cancel(skb, port_item);
2361         return -EMSGSIZE;
2362 }
2363
2364 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2365                                       int flags, team_nl_send_func_t *send_func,
2366                                       struct team_port *one_port)
2367 {
2368         struct nlattr *port_list;
2369         struct nlmsghdr *nlh;
2370         void *hdr;
2371         struct team_port *port;
2372         int err;
2373         struct sk_buff *skb = NULL;
2374         bool incomplete;
2375         int i;
2376
2377         port = list_first_entry_or_null(&team->port_list,
2378                                         struct team_port, list);
2379
2380 start_again:
2381         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2382         if (err)
2383                 return err;
2384
2385         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2386                           TEAM_CMD_PORT_LIST_GET);
2387         if (!hdr)
2388                 return -EMSGSIZE;
2389
2390         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2391                 goto nla_put_failure;
2392         port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2393         if (!port_list)
2394                 goto nla_put_failure;
2395
2396         i = 0;
2397         incomplete = false;
2398
2399         /* If one port is selected, called wants to send port list containing
2400          * only this port. Otherwise go through all listed ports and send all
2401          */
2402         if (one_port) {
2403                 err = team_nl_fill_one_port_get(skb, one_port);
2404                 if (err)
2405                         goto errout;
2406         } else if (port) {
2407                 list_for_each_entry_from(port, &team->port_list, list) {
2408                         err = team_nl_fill_one_port_get(skb, port);
2409                         if (err) {
2410                                 if (err == -EMSGSIZE) {
2411                                         if (!i)
2412                                                 goto errout;
2413                                         incomplete = true;
2414                                         break;
2415                                 }
2416                                 goto errout;
2417                         }
2418                         i++;
2419                 }
2420         }
2421
2422         nla_nest_end(skb, port_list);
2423         genlmsg_end(skb, hdr);
2424         if (incomplete)
2425                 goto start_again;
2426
2427 send_done:
2428         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2429         if (!nlh) {
2430                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2431                 if (err)
2432                         goto errout;
2433                 goto send_done;
2434         }
2435
2436         return send_func(skb, team, portid);
2437
2438 nla_put_failure:
2439         err = -EMSGSIZE;
2440 errout:
2441         genlmsg_cancel(skb, hdr);
2442         nlmsg_free(skb);
2443         return err;
2444 }
2445
2446 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2447                                      struct genl_info *info)
2448 {
2449         struct team *team;
2450         int err;
2451
2452         team = team_nl_team_get(info);
2453         if (!team)
2454                 return -EINVAL;
2455
2456         err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2457                                          NLM_F_ACK, team_nl_send_unicast, NULL);
2458
2459         team_nl_team_put(team);
2460
2461         return err;
2462 }
2463
2464 static struct genl_ops team_nl_ops[] = {
2465         {
2466                 .cmd = TEAM_CMD_NOOP,
2467                 .doit = team_nl_cmd_noop,
2468                 .policy = team_nl_policy,
2469         },
2470         {
2471                 .cmd = TEAM_CMD_OPTIONS_SET,
2472                 .doit = team_nl_cmd_options_set,
2473                 .policy = team_nl_policy,
2474                 .flags = GENL_ADMIN_PERM,
2475         },
2476         {
2477                 .cmd = TEAM_CMD_OPTIONS_GET,
2478                 .doit = team_nl_cmd_options_get,
2479                 .policy = team_nl_policy,
2480                 .flags = GENL_ADMIN_PERM,
2481         },
2482         {
2483                 .cmd = TEAM_CMD_PORT_LIST_GET,
2484                 .doit = team_nl_cmd_port_list_get,
2485                 .policy = team_nl_policy,
2486                 .flags = GENL_ADMIN_PERM,
2487         },
2488 };
2489
2490 static struct genl_multicast_group team_change_event_mcgrp = {
2491         .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME,
2492 };
2493
2494 static int team_nl_send_multicast(struct sk_buff *skb,
2495                                   struct team *team, u32 portid)
2496 {
2497         return genlmsg_multicast_netns(dev_net(team->dev), skb, 0,
2498                                        team_change_event_mcgrp.id, GFP_KERNEL);
2499 }
2500
2501 static int team_nl_send_event_options_get(struct team *team,
2502                                           struct list_head *sel_opt_inst_list)
2503 {
2504         return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2505                                         sel_opt_inst_list);
2506 }
2507
2508 static int team_nl_send_event_port_get(struct team *team,
2509                                        struct team_port *port)
2510 {
2511         return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2512                                           port);
2513 }
2514
2515 static int team_nl_init(void)
2516 {
2517         int err;
2518
2519         err = genl_register_family_with_ops(&team_nl_family, team_nl_ops,
2520                                             ARRAY_SIZE(team_nl_ops));
2521         if (err)
2522                 return err;
2523
2524         err = genl_register_mc_group(&team_nl_family, &team_change_event_mcgrp);
2525         if (err)
2526                 goto err_change_event_grp_reg;
2527
2528         return 0;
2529
2530 err_change_event_grp_reg:
2531         genl_unregister_family(&team_nl_family);
2532
2533         return err;
2534 }
2535
2536 static void team_nl_fini(void)
2537 {
2538         genl_unregister_family(&team_nl_family);
2539 }
2540
2541
2542 /******************
2543  * Change checkers
2544  ******************/
2545
2546 static void __team_options_change_check(struct team *team)
2547 {
2548         int err;
2549         struct team_option_inst *opt_inst;
2550         LIST_HEAD(sel_opt_inst_list);
2551
2552         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2553                 if (opt_inst->changed)
2554                         list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2555         }
2556         err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2557         if (err && err != -ESRCH)
2558                 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2559                             err);
2560 }
2561
2562 /* rtnl lock is held */
2563
2564 static void __team_port_change_send(struct team_port *port, bool linkup)
2565 {
2566         int err;
2567
2568         port->changed = true;
2569         port->state.linkup = linkup;
2570         team_refresh_port_linkup(port);
2571         if (linkup) {
2572                 struct ethtool_cmd ecmd;
2573
2574                 err = __ethtool_get_settings(port->dev, &ecmd);
2575                 if (!err) {
2576                         port->state.speed = ethtool_cmd_speed(&ecmd);
2577                         port->state.duplex = ecmd.duplex;
2578                         goto send_event;
2579                 }
2580         }
2581         port->state.speed = 0;
2582         port->state.duplex = 0;
2583
2584 send_event:
2585         err = team_nl_send_event_port_get(port->team, port);
2586         if (err && err != -ESRCH)
2587                 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2588                             port->dev->name, err);
2589
2590 }
2591
2592 static void __team_carrier_check(struct team *team)
2593 {
2594         struct team_port *port;
2595         bool team_linkup;
2596
2597         if (team->user_carrier_enabled)
2598                 return;
2599
2600         team_linkup = false;
2601         list_for_each_entry(port, &team->port_list, list) {
2602                 if (port->linkup) {
2603                         team_linkup = true;
2604                         break;
2605                 }
2606         }
2607
2608         if (team_linkup)
2609                 netif_carrier_on(team->dev);
2610         else
2611                 netif_carrier_off(team->dev);
2612 }
2613
2614 static void __team_port_change_check(struct team_port *port, bool linkup)
2615 {
2616         if (port->state.linkup != linkup)
2617                 __team_port_change_send(port, linkup);
2618         __team_carrier_check(port->team);
2619 }
2620
2621 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2622 {
2623         __team_port_change_send(port, linkup);
2624         __team_carrier_check(port->team);
2625 }
2626
2627 static void __team_port_change_port_removed(struct team_port *port)
2628 {
2629         port->removed = true;
2630         __team_port_change_send(port, false);
2631         __team_carrier_check(port->team);
2632 }
2633
2634 static void team_port_change_check(struct team_port *port, bool linkup)
2635 {
2636         struct team *team = port->team;
2637
2638         mutex_lock(&team->lock);
2639         __team_port_change_check(port, linkup);
2640         mutex_unlock(&team->lock);
2641 }
2642
2643
2644 /************************************
2645  * Net device notifier event handler
2646  ************************************/
2647
2648 static int team_device_event(struct notifier_block *unused,
2649                              unsigned long event, void *ptr)
2650 {
2651         struct net_device *dev = (struct net_device *) ptr;
2652         struct team_port *port;
2653
2654         port = team_port_get_rtnl(dev);
2655         if (!port)
2656                 return NOTIFY_DONE;
2657
2658         switch (event) {
2659         case NETDEV_UP:
2660                 if (netif_carrier_ok(dev))
2661                         team_port_change_check(port, true);
2662         case NETDEV_DOWN:
2663                 team_port_change_check(port, false);
2664         case NETDEV_CHANGE:
2665                 if (netif_running(port->dev))
2666                         team_port_change_check(port,
2667                                                !!netif_carrier_ok(port->dev));
2668                 break;
2669         case NETDEV_UNREGISTER:
2670                 team_del_slave(port->team->dev, dev);
2671                 break;
2672         case NETDEV_FEAT_CHANGE:
2673                 team_compute_features(port->team);
2674                 break;
2675         case NETDEV_CHANGEMTU:
2676                 /* Forbid to change mtu of underlaying device */
2677                 return NOTIFY_BAD;
2678         case NETDEV_PRE_TYPE_CHANGE:
2679                 /* Forbid to change type of underlaying device */
2680                 return NOTIFY_BAD;
2681         }
2682         return NOTIFY_DONE;
2683 }
2684
2685 static struct notifier_block team_notifier_block __read_mostly = {
2686         .notifier_call = team_device_event,
2687 };
2688
2689
2690 /***********************
2691  * Module init and exit
2692  ***********************/
2693
2694 static int __init team_module_init(void)
2695 {
2696         int err;
2697
2698         register_netdevice_notifier(&team_notifier_block);
2699
2700         err = rtnl_link_register(&team_link_ops);
2701         if (err)
2702                 goto err_rtnl_reg;
2703
2704         err = team_nl_init();
2705         if (err)
2706                 goto err_nl_init;
2707
2708         return 0;
2709
2710 err_nl_init:
2711         rtnl_link_unregister(&team_link_ops);
2712
2713 err_rtnl_reg:
2714         unregister_netdevice_notifier(&team_notifier_block);
2715
2716         return err;
2717 }
2718
2719 static void __exit team_module_exit(void)
2720 {
2721         team_nl_fini();
2722         rtnl_link_unregister(&team_link_ops);
2723         unregister_netdevice_notifier(&team_notifier_block);
2724 }
2725
2726 module_init(team_module_init);
2727 module_exit(team_module_exit);
2728
2729 MODULE_LICENSE("GPL v2");
2730 MODULE_AUTHOR("Jiri Pirko <[email protected]>");
2731 MODULE_DESCRIPTION("Ethernet team device driver");
2732 MODULE_ALIAS_RTNL_LINK(DRV_NAME);