drivers/net/team/team.c

   1 /*
   2  * drivers/net/team/team.c - Network team device driver
   3  * Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/types.h>
  13 #include <linux/module.h>
  14 #include <linux/init.h>
  15 #include <linux/slab.h>
  16 #include <linux/rcupdate.h>
  17 #include <linux/errno.h>
  18 #include <linux/ctype.h>
  19 #include <linux/notifier.h>
  20 #include <linux/netdevice.h>
  21 #include <linux/netpoll.h>
  22 #include <linux/if_vlan.h>
  23 #include <linux/if_arp.h>
  24 #include <linux/socket.h>
  25 #include <linux/etherdevice.h>
  26 #include <linux/rtnetlink.h>
  27 #include <net/rtnetlink.h>
  28 #include <net/genetlink.h>
  29 #include <net/netlink.h>
  30 #include <net/sch_generic.h>
  31 #include <generated/utsrelease.h>
  32 #include <linux/if_team.h>
  33
  34 #define DRV_NAME "team"
  35
  36
  37 /**********
  38  * Helpers
  39  **********/
  40
  41 #define team_port_exists(dev) (dev->priv_flags & IFF_TEAM_PORT)
  42
  43 static struct team_port *team_port_get_rcu(const struct net_device *dev)
  44 {
  45         struct team_port *port = rcu_dereference(dev->rx_handler_data);
  46
  47         return team_port_exists(dev) ? port : NULL;
  48 }
  49
  50 static struct team_port *team_port_get_rtnl(const struct net_device *dev)
  51 {
  52         struct team_port *port = rtnl_dereference(dev->rx_handler_data);
  53
  54         return team_port_exists(dev) ? port : NULL;
  55 }
  56
  57 /*
  58  * Since the ability to change device address for open port device is tested in
  59  * team_port_add, this function can be called without control of return value
  60  */
  61 static int __set_port_dev_addr(struct net_device *port_dev,
  62                                const unsigned char *dev_addr)
  63 {
  64         struct sockaddr addr;
  65
  66         memcpy(addr.sa_data, dev_addr, port_dev->addr_len);
  67         addr.sa_family = port_dev->type;
  68         return dev_set_mac_address(port_dev, &addr);
  69 }
  70
  71 static int team_port_set_orig_dev_addr(struct team_port *port)
  72 {
  73         return __set_port_dev_addr(port->dev, port->orig.dev_addr);
  74 }
  75
  76 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 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_close(port_dev);
1155         team_port_leave(team, port);
1156
1157         __team_option_inst_mark_removed_port(team, port);
1158         __team_options_change_check(team);
1159         __team_option_inst_del_port(team, port);
1160         __team_port_change_port_removed(port);
1161
1162         team_port_set_orig_dev_addr(port);
1163         dev_set_mtu(port_dev, port->orig.mtu);
1164         synchronize_rcu();
1165         kfree(port);
1166         netdev_info(dev, "Port device %s removed\n", portname);
1167         __team_compute_features(team);
1168
1169         return 0;
1170 }
1171
1172
1173 /*****************
1174  * Net device ops
1175  *****************/
1176
1177 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1178 {
1179         ctx->data.str_val = team->mode->kind;
1180         return 0;
1181 }
1182
1183 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1184 {
1185         return team_change_mode(team, ctx->data.str_val);
1186 }
1187
1188 static int team_port_en_option_get(struct team *team,
1189                                    struct team_gsetter_ctx *ctx)
1190 {
1191         struct team_port *port = ctx->info->port;
1192
1193         ctx->data.bool_val = team_port_enabled(port);
1194         return 0;
1195 }
1196
1197 static int team_port_en_option_set(struct team *team,
1198                                    struct team_gsetter_ctx *ctx)
1199 {
1200         struct team_port *port = ctx->info->port;
1201
1202         if (ctx->data.bool_val)
1203                 team_port_enable(team, port);
1204         else
1205                 team_port_disable(team, port);
1206         return 0;
1207 }
1208
1209 static int team_user_linkup_option_get(struct team *team,
1210                                        struct team_gsetter_ctx *ctx)
1211 {
1212         struct team_port *port = ctx->info->port;
1213
1214         ctx->data.bool_val = port->user.linkup;
1215         return 0;
1216 }
1217
1218 static int team_user_linkup_option_set(struct team *team,
1219                                        struct team_gsetter_ctx *ctx)
1220 {
1221         struct team_port *port = ctx->info->port;
1222
1223         port->user.linkup = ctx->data.bool_val;
1224         team_refresh_port_linkup(port);
1225         return 0;
1226 }
1227
1228 static int team_user_linkup_en_option_get(struct team *team,
1229                                           struct team_gsetter_ctx *ctx)
1230 {
1231         struct team_port *port = ctx->info->port;
1232
1233         ctx->data.bool_val = port->user.linkup_enabled;
1234         return 0;
1235 }
1236
1237 static int team_user_linkup_en_option_set(struct team *team,
1238                                           struct team_gsetter_ctx *ctx)
1239 {
1240         struct team_port *port = ctx->info->port;
1241
1242         port->user.linkup_enabled = ctx->data.bool_val;
1243         team_refresh_port_linkup(port);
1244         return 0;
1245 }
1246
1247 static int team_priority_option_get(struct team *team,
1248                                     struct team_gsetter_ctx *ctx)
1249 {
1250         struct team_port *port = ctx->info->port;
1251
1252         ctx->data.s32_val = port->priority;
1253         return 0;
1254 }
1255
1256 static int team_priority_option_set(struct team *team,
1257                                     struct team_gsetter_ctx *ctx)
1258 {
1259         struct team_port *port = ctx->info->port;
1260
1261         port->priority = ctx->data.s32_val;
1262         team_queue_override_port_refresh(team, port);
1263         return 0;
1264 }
1265
1266 static int team_queue_id_option_get(struct team *team,
1267                                     struct team_gsetter_ctx *ctx)
1268 {
1269         struct team_port *port = ctx->info->port;
1270
1271         ctx->data.u32_val = port->queue_id;
1272         return 0;
1273 }
1274
1275 static int team_queue_id_option_set(struct team *team,
1276                                     struct team_gsetter_ctx *ctx)
1277 {
1278         struct team_port *port = ctx->info->port;
1279
1280         if (port->queue_id == ctx->data.u32_val)
1281                 return 0;
1282         if (ctx->data.u32_val >= team->dev->real_num_tx_queues)
1283                 return -EINVAL;
1284         port->queue_id = ctx->data.u32_val;
1285         team_queue_override_port_refresh(team, port);
1286         return 0;
1287 }
1288
1289
1290 static const struct team_option team_options[] = {
1291         {
1292                 .name = "mode",
1293                 .type = TEAM_OPTION_TYPE_STRING,
1294                 .getter = team_mode_option_get,
1295                 .setter = team_mode_option_set,
1296         },
1297         {
1298                 .name = "enabled",
1299                 .type = TEAM_OPTION_TYPE_BOOL,
1300                 .per_port = true,
1301                 .getter = team_port_en_option_get,
1302                 .setter = team_port_en_option_set,
1303         },
1304         {
1305                 .name = "user_linkup",
1306                 .type = TEAM_OPTION_TYPE_BOOL,
1307                 .per_port = true,
1308                 .getter = team_user_linkup_option_get,
1309                 .setter = team_user_linkup_option_set,
1310         },
1311         {
1312                 .name = "user_linkup_enabled",
1313                 .type = TEAM_OPTION_TYPE_BOOL,
1314                 .per_port = true,
1315                 .getter = team_user_linkup_en_option_get,
1316                 .setter = team_user_linkup_en_option_set,
1317         },
1318         {
1319                 .name = "priority",
1320                 .type = TEAM_OPTION_TYPE_S32,
1321                 .per_port = true,
1322                 .getter = team_priority_option_get,
1323                 .setter = team_priority_option_set,
1324         },
1325         {
1326                 .name = "queue_id",
1327                 .type = TEAM_OPTION_TYPE_U32,
1328                 .per_port = true,
1329                 .getter = team_queue_id_option_get,
1330                 .setter = team_queue_id_option_set,
1331         },
1332 };
1333
1334 static struct lock_class_key team_netdev_xmit_lock_key;
1335 static struct lock_class_key team_netdev_addr_lock_key;
1336 static struct lock_class_key team_tx_busylock_key;
1337
1338 static void team_set_lockdep_class_one(struct net_device *dev,
1339                                        struct netdev_queue *txq,
1340                                        void *unused)
1341 {
1342         lockdep_set_class(&txq->_xmit_lock, &team_netdev_xmit_lock_key);
1343 }
1344
1345 static void team_set_lockdep_class(struct net_device *dev)
1346 {
1347         lockdep_set_class(&dev->addr_list_lock, &team_netdev_addr_lock_key);
1348         netdev_for_each_tx_queue(dev, team_set_lockdep_class_one, NULL);
1349         dev->qdisc_tx_busylock = &team_tx_busylock_key;
1350 }
1351
1352 static int team_init(struct net_device *dev)
1353 {
1354         struct team *team = netdev_priv(dev);
1355         int i;
1356         int err;
1357
1358         team->dev = dev;
1359         mutex_init(&team->lock);
1360         team_set_no_mode(team);
1361
1362         team->pcpu_stats = alloc_percpu(struct team_pcpu_stats);
1363         if (!team->pcpu_stats)
1364                 return -ENOMEM;
1365
1366         for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1367                 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1368         INIT_LIST_HEAD(&team->port_list);
1369         err = team_queue_override_init(team);
1370         if (err)
1371                 goto err_team_queue_override_init;
1372
1373         team_adjust_ops(team);
1374
1375         INIT_LIST_HEAD(&team->option_list);
1376         INIT_LIST_HEAD(&team->option_inst_list);
1377         err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1378         if (err)
1379                 goto err_options_register;
1380         netif_carrier_off(dev);
1381
1382         team_set_lockdep_class(dev);
1383
1384         return 0;
1385
1386 err_options_register:
1387         team_queue_override_fini(team);
1388 err_team_queue_override_init:
1389         free_percpu(team->pcpu_stats);
1390
1391         return err;
1392 }
1393
1394 static void team_uninit(struct net_device *dev)
1395 {
1396         struct team *team = netdev_priv(dev);
1397         struct team_port *port;
1398         struct team_port *tmp;
1399
1400         mutex_lock(&team->lock);
1401         list_for_each_entry_safe(port, tmp, &team->port_list, list)
1402                 team_port_del(team, port->dev);
1403
1404         __team_change_mode(team, NULL); /* cleanup */
1405         __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1406         team_queue_override_fini(team);
1407         mutex_unlock(&team->lock);
1408 }
1409
1410 static void team_destructor(struct net_device *dev)
1411 {
1412         struct team *team = netdev_priv(dev);
1413
1414         free_percpu(team->pcpu_stats);
1415         free_netdev(dev);
1416 }
1417
1418 static int team_open(struct net_device *dev)
1419 {
1420         return 0;
1421 }
1422
1423 static int team_close(struct net_device *dev)
1424 {
1425         return 0;
1426 }
1427
1428 /*
1429  * note: already called with rcu_read_lock
1430  */
1431 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1432 {
1433         struct team *team = netdev_priv(dev);
1434         bool tx_success;
1435         unsigned int len = skb->len;
1436
1437         tx_success = team_queue_override_transmit(team, skb);
1438         if (!tx_success)
1439                 tx_success = team->ops.transmit(team, skb);
1440         if (tx_success) {
1441                 struct team_pcpu_stats *pcpu_stats;
1442
1443                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1444                 u64_stats_update_begin(&pcpu_stats->syncp);
1445                 pcpu_stats->tx_packets++;
1446                 pcpu_stats->tx_bytes += len;
1447                 u64_stats_update_end(&pcpu_stats->syncp);
1448         } else {
1449                 this_cpu_inc(team->pcpu_stats->tx_dropped);
1450         }
1451
1452         return NETDEV_TX_OK;
1453 }
1454
1455 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb)
1456 {
1457         /*
1458          * This helper function exists to help dev_pick_tx get the correct
1459          * destination queue.  Using a helper function skips a call to
1460          * skb_tx_hash and will put the skbs in the queue we expect on their
1461          * way down to the team driver.
1462          */
1463         u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1464
1465         /*
1466          * Save the original txq to restore before passing to the driver
1467          */
1468         qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1469
1470         if (unlikely(txq >= dev->real_num_tx_queues)) {
1471                 do {
1472                         txq -= dev->real_num_tx_queues;
1473                 } while (txq >= dev->real_num_tx_queues);
1474         }
1475         return txq;
1476 }
1477
1478 static void team_change_rx_flags(struct net_device *dev, int change)
1479 {
1480         struct team *team = netdev_priv(dev);
1481         struct team_port *port;
1482         int inc;
1483
1484         rcu_read_lock();
1485         list_for_each_entry_rcu(port, &team->port_list, list) {
1486                 if (change & IFF_PROMISC) {
1487                         inc = dev->flags & IFF_PROMISC ? 1 : -1;
1488                         dev_set_promiscuity(port->dev, inc);
1489                 }
1490                 if (change & IFF_ALLMULTI) {
1491                         inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1492                         dev_set_allmulti(port->dev, inc);
1493                 }
1494         }
1495         rcu_read_unlock();
1496 }
1497
1498 static void team_set_rx_mode(struct net_device *dev)
1499 {
1500         struct team *team = netdev_priv(dev);
1501         struct team_port *port;
1502
1503         rcu_read_lock();
1504         list_for_each_entry_rcu(port, &team->port_list, list) {
1505                 dev_uc_sync(port->dev, dev);
1506                 dev_mc_sync(port->dev, dev);
1507         }
1508         rcu_read_unlock();
1509 }
1510
1511 static int team_set_mac_address(struct net_device *dev, void *p)
1512 {
1513         struct sockaddr *addr = p;
1514         struct team *team = netdev_priv(dev);
1515         struct team_port *port;
1516
1517         if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1518                 return -EADDRNOTAVAIL;
1519         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1520         rcu_read_lock();
1521         list_for_each_entry_rcu(port, &team->port_list, list)
1522                 if (team->ops.port_change_dev_addr)
1523                         team->ops.port_change_dev_addr(team, port);
1524         rcu_read_unlock();
1525         return 0;
1526 }
1527
1528 static int team_change_mtu(struct net_device *dev, int new_mtu)
1529 {
1530         struct team *team = netdev_priv(dev);
1531         struct team_port *port;
1532         int err;
1533
1534         /*
1535          * Alhough this is reader, it's guarded by team lock. It's not possible
1536          * to traverse list in reverse under rcu_read_lock
1537          */
1538         mutex_lock(&team->lock);
1539         list_for_each_entry(port, &team->port_list, list) {
1540                 err = dev_set_mtu(port->dev, new_mtu);
1541                 if (err) {
1542                         netdev_err(dev, "Device %s failed to change mtu",
1543                                    port->dev->name);
1544                         goto unwind;
1545                 }
1546         }
1547         mutex_unlock(&team->lock);
1548
1549         dev->mtu = new_mtu;
1550
1551         return 0;
1552
1553 unwind:
1554         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1555                 dev_set_mtu(port->dev, dev->mtu);
1556         mutex_unlock(&team->lock);
1557
1558         return err;
1559 }
1560
1561 static struct rtnl_link_stats64 *
1562 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1563 {
1564         struct team *team = netdev_priv(dev);
1565         struct team_pcpu_stats *p;
1566         u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1567         u32 rx_dropped = 0, tx_dropped = 0;
1568         unsigned int start;
1569         int i;
1570
1571         for_each_possible_cpu(i) {
1572                 p = per_cpu_ptr(team->pcpu_stats, i);
1573                 do {
1574                         start = u64_stats_fetch_begin_bh(&p->syncp);
1575                         rx_packets      = p->rx_packets;
1576                         rx_bytes        = p->rx_bytes;
1577                         rx_multicast    = p->rx_multicast;
1578                         tx_packets      = p->tx_packets;
1579                         tx_bytes        = p->tx_bytes;
1580                 } while (u64_stats_fetch_retry_bh(&p->syncp, start));
1581
1582                 stats->rx_packets       += rx_packets;
1583                 stats->rx_bytes         += rx_bytes;
1584                 stats->multicast        += rx_multicast;
1585                 stats->tx_packets       += tx_packets;
1586                 stats->tx_bytes         += tx_bytes;
1587                 /*
1588                  * rx_dropped & tx_dropped are u32, updated
1589                  * without syncp protection.
1590                  */
1591                 rx_dropped      += p->rx_dropped;
1592                 tx_dropped      += p->tx_dropped;
1593         }
1594         stats->rx_dropped       = rx_dropped;
1595         stats->tx_dropped       = tx_dropped;
1596         return stats;
1597 }
1598
1599 static int team_vlan_rx_add_vid(struct net_device *dev, uint16_t vid)
1600 {
1601         struct team *team = netdev_priv(dev);
1602         struct team_port *port;
1603         int err;
1604
1605         /*
1606          * Alhough this is reader, it's guarded by team lock. It's not possible
1607          * to traverse list in reverse under rcu_read_lock
1608          */
1609         mutex_lock(&team->lock);
1610         list_for_each_entry(port, &team->port_list, list) {
1611                 err = vlan_vid_add(port->dev, vid);
1612                 if (err)
1613                         goto unwind;
1614         }
1615         mutex_unlock(&team->lock);
1616
1617         return 0;
1618
1619 unwind:
1620         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1621                 vlan_vid_del(port->dev, vid);
1622         mutex_unlock(&team->lock);
1623
1624         return err;
1625 }
1626
1627 static int team_vlan_rx_kill_vid(struct net_device *dev, uint16_t vid)
1628 {
1629         struct team *team = netdev_priv(dev);
1630         struct team_port *port;
1631
1632         rcu_read_lock();
1633         list_for_each_entry_rcu(port, &team->port_list, list)
1634                 vlan_vid_del(port->dev, vid);
1635         rcu_read_unlock();
1636
1637         return 0;
1638 }
1639
1640 #ifdef CONFIG_NET_POLL_CONTROLLER
1641 static void team_poll_controller(struct net_device *dev)
1642 {
1643 }
1644
1645 static void __team_netpoll_cleanup(struct team *team)
1646 {
1647         struct team_port *port;
1648
1649         list_for_each_entry(port, &team->port_list, list)
1650                 team_port_disable_netpoll(port);
1651 }
1652
1653 static void team_netpoll_cleanup(struct net_device *dev)
1654 {
1655         struct team *team = netdev_priv(dev);
1656
1657         mutex_lock(&team->lock);
1658         __team_netpoll_cleanup(team);
1659         mutex_unlock(&team->lock);
1660 }
1661
1662 static int team_netpoll_setup(struct net_device *dev,
1663                               struct netpoll_info *npifo, gfp_t gfp)
1664 {
1665         struct team *team = netdev_priv(dev);
1666         struct team_port *port;
1667         int err = 0;
1668
1669         mutex_lock(&team->lock);
1670         list_for_each_entry(port, &team->port_list, list) {
1671                 err = team_port_enable_netpoll(team, port, gfp);
1672                 if (err) {
1673                         __team_netpoll_cleanup(team);
1674                         break;
1675                 }
1676         }
1677         mutex_unlock(&team->lock);
1678         return err;
1679 }
1680 #endif
1681
1682 static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
1683 {
1684         struct team *team = netdev_priv(dev);
1685         int err;
1686
1687         mutex_lock(&team->lock);
1688         err = team_port_add(team, port_dev);
1689         mutex_unlock(&team->lock);
1690         return err;
1691 }
1692
1693 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1694 {
1695         struct team *team = netdev_priv(dev);
1696         int err;
1697
1698         mutex_lock(&team->lock);
1699         err = team_port_del(team, port_dev);
1700         mutex_unlock(&team->lock);
1701         return err;
1702 }
1703
1704 static netdev_features_t team_fix_features(struct net_device *dev,
1705                                            netdev_features_t features)
1706 {
1707         struct team_port *port;
1708         struct team *team = netdev_priv(dev);
1709         netdev_features_t mask;
1710
1711         mask = features;
1712         features &= ~NETIF_F_ONE_FOR_ALL;
1713         features |= NETIF_F_ALL_FOR_ALL;
1714
1715         rcu_read_lock();
1716         list_for_each_entry_rcu(port, &team->port_list, list) {
1717                 features = netdev_increment_features(features,
1718                                                      port->dev->features,
1719                                                      mask);
1720         }
1721         rcu_read_unlock();
1722         return features;
1723 }
1724
1725 static int team_change_carrier(struct net_device *dev, bool new_carrier)
1726 {
1727         struct team *team = netdev_priv(dev);
1728
1729         team->user_carrier_enabled = true;
1730
1731         if (new_carrier)
1732                 netif_carrier_on(dev);
1733         else
1734                 netif_carrier_off(dev);
1735         return 0;
1736 }
1737
1738 static const struct net_device_ops team_netdev_ops = {
1739         .ndo_init               = team_init,
1740         .ndo_uninit             = team_uninit,
1741         .ndo_open               = team_open,
1742         .ndo_stop               = team_close,
1743         .ndo_start_xmit         = team_xmit,
1744         .ndo_select_queue       = team_select_queue,
1745         .ndo_change_rx_flags    = team_change_rx_flags,
1746         .ndo_set_rx_mode        = team_set_rx_mode,
1747         .ndo_set_mac_address    = team_set_mac_address,
1748         .ndo_change_mtu         = team_change_mtu,
1749         .ndo_get_stats64        = team_get_stats64,
1750         .ndo_vlan_rx_add_vid    = team_vlan_rx_add_vid,
1751         .ndo_vlan_rx_kill_vid   = team_vlan_rx_kill_vid,
1752 #ifdef CONFIG_NET_POLL_CONTROLLER
1753         .ndo_poll_controller    = team_poll_controller,
1754         .ndo_netpoll_setup      = team_netpoll_setup,
1755         .ndo_netpoll_cleanup    = team_netpoll_cleanup,
1756 #endif
1757         .ndo_add_slave          = team_add_slave,
1758         .ndo_del_slave          = team_del_slave,
1759         .ndo_fix_features       = team_fix_features,
1760         .ndo_change_carrier     = team_change_carrier,
1761 };
1762
1763 /***********************
1764  * ethtool interface
1765  ***********************/
1766
1767 static void team_ethtool_get_drvinfo(struct net_device *dev,
1768                                      struct ethtool_drvinfo *drvinfo)
1769 {
1770         strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
1771         strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
1772 }
1773
1774 static const struct ethtool_ops team_ethtool_ops = {
1775         .get_drvinfo            = team_ethtool_get_drvinfo,
1776         .get_link               = ethtool_op_get_link,
1777 };
1778
1779 /***********************
1780  * rt netlink interface
1781  ***********************/
1782
1783 static void team_setup_by_port(struct net_device *dev,
1784                                struct net_device *port_dev)
1785 {
1786         dev->header_ops = port_dev->header_ops;
1787         dev->type = port_dev->type;
1788         dev->hard_header_len = port_dev->hard_header_len;
1789         dev->addr_len = port_dev->addr_len;
1790         dev->mtu = port_dev->mtu;
1791         memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
1792         memcpy(dev->dev_addr, port_dev->dev_addr, port_dev->addr_len);
1793 }
1794
1795 static int team_dev_type_check_change(struct net_device *dev,
1796                                       struct net_device *port_dev)
1797 {
1798         struct team *team = netdev_priv(dev);
1799         char *portname = port_dev->name;
1800         int err;
1801
1802         if (dev->type == port_dev->type)
1803                 return 0;
1804         if (!list_empty(&team->port_list)) {
1805                 netdev_err(dev, "Device %s is of different type\n", portname);
1806                 return -EBUSY;
1807         }
1808         err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
1809         err = notifier_to_errno(err);
1810         if (err) {
1811                 netdev_err(dev, "Refused to change device type\n");
1812                 return err;
1813         }
1814         dev_uc_flush(dev);
1815         dev_mc_flush(dev);
1816         team_setup_by_port(dev, port_dev);
1817         call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
1818         return 0;
1819 }
1820
1821 static void team_setup(struct net_device *dev)
1822 {
1823         ether_setup(dev);
1824
1825         dev->netdev_ops = &team_netdev_ops;
1826         dev->ethtool_ops = &team_ethtool_ops;
1827         dev->destructor = team_destructor;
1828         dev->tx_queue_len = 0;
1829         dev->flags |= IFF_MULTICAST;
1830         dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
1831
1832         /*
1833          * Indicate we support unicast address filtering. That way core won't
1834          * bring us to promisc mode in case a unicast addr is added.
1835          * Let this up to underlay drivers.
1836          */
1837         dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
1838
1839         dev->features |= NETIF_F_LLTX;
1840         dev->features |= NETIF_F_GRO;
1841         dev->hw_features = TEAM_VLAN_FEATURES |
1842                            NETIF_F_HW_VLAN_TX |
1843                            NETIF_F_HW_VLAN_RX |
1844                            NETIF_F_HW_VLAN_FILTER;
1845
1846         dev->hw_features &= ~(NETIF_F_ALL_CSUM & ~NETIF_F_HW_CSUM);
1847         dev->features |= dev->hw_features;
1848 }
1849
1850 static int team_newlink(struct net *src_net, struct net_device *dev,
1851                         struct nlattr *tb[], struct nlattr *data[])
1852 {
1853         int err;
1854
1855         if (tb[IFLA_ADDRESS] == NULL)
1856                 eth_hw_addr_random(dev);
1857
1858         err = register_netdevice(dev);
1859         if (err)
1860                 return err;
1861
1862         return 0;
1863 }
1864
1865 static int team_validate(struct nlattr *tb[], struct nlattr *data[])
1866 {
1867         if (tb[IFLA_ADDRESS]) {
1868                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
1869                         return -EINVAL;
1870                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
1871                         return -EADDRNOTAVAIL;
1872         }
1873         return 0;
1874 }
1875
1876 static unsigned int team_get_num_tx_queues(void)
1877 {
1878         return TEAM_DEFAULT_NUM_TX_QUEUES;
1879 }
1880
1881 static unsigned int team_get_num_rx_queues(void)
1882 {
1883         return TEAM_DEFAULT_NUM_RX_QUEUES;
1884 }
1885
1886 static struct rtnl_link_ops team_link_ops __read_mostly = {
1887         .kind                   = DRV_NAME,
1888         .priv_size              = sizeof(struct team),
1889         .setup                  = team_setup,
1890         .newlink                = team_newlink,
1891         .validate               = team_validate,
1892         .get_num_tx_queues      = team_get_num_tx_queues,
1893         .get_num_rx_queues      = team_get_num_rx_queues,
1894 };
1895
1896
1897 /***********************************
1898  * Generic netlink custom interface
1899  ***********************************/
1900
1901 static struct genl_family team_nl_family = {
1902         .id             = GENL_ID_GENERATE,
1903         .name           = TEAM_GENL_NAME,
1904         .version        = TEAM_GENL_VERSION,
1905         .maxattr        = TEAM_ATTR_MAX,
1906         .netnsok        = true,
1907 };
1908
1909 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
1910         [TEAM_ATTR_UNSPEC]                      = { .type = NLA_UNSPEC, },
1911         [TEAM_ATTR_TEAM_IFINDEX]                = { .type = NLA_U32 },
1912         [TEAM_ATTR_LIST_OPTION]                 = { .type = NLA_NESTED },
1913         [TEAM_ATTR_LIST_PORT]                   = { .type = NLA_NESTED },
1914 };
1915
1916 static const struct nla_policy
1917 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
1918         [TEAM_ATTR_OPTION_UNSPEC]               = { .type = NLA_UNSPEC, },
1919         [TEAM_ATTR_OPTION_NAME] = {
1920                 .type = NLA_STRING,
1921                 .len = TEAM_STRING_MAX_LEN,
1922         },
1923         [TEAM_ATTR_OPTION_CHANGED]              = { .type = NLA_FLAG },
1924         [TEAM_ATTR_OPTION_TYPE]                 = { .type = NLA_U8 },
1925         [TEAM_ATTR_OPTION_DATA]                 = { .type = NLA_BINARY },
1926 };
1927
1928 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
1929 {
1930         struct sk_buff *msg;
1931         void *hdr;
1932         int err;
1933
1934         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1935         if (!msg)
1936                 return -ENOMEM;
1937
1938         hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
1939                           &team_nl_family, 0, TEAM_CMD_NOOP);
1940         if (!hdr) {
1941                 err = -EMSGSIZE;
1942                 goto err_msg_put;
1943         }
1944
1945         genlmsg_end(msg, hdr);
1946
1947         return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
1948
1949 err_msg_put:
1950         nlmsg_free(msg);
1951
1952         return err;
1953 }
1954
1955 /*
1956  * Netlink cmd functions should be locked by following two functions.
1957  * Since dev gets held here, that ensures dev won't disappear in between.
1958  */
1959 static struct team *team_nl_team_get(struct genl_info *info)
1960 {
1961         struct net *net = genl_info_net(info);
1962         int ifindex;
1963         struct net_device *dev;
1964         struct team *team;
1965
1966         if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
1967                 return NULL;
1968
1969         ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
1970         dev = dev_get_by_index(net, ifindex);
1971         if (!dev || dev->netdev_ops != &team_netdev_ops) {
1972                 if (dev)
1973                         dev_put(dev);
1974                 return NULL;
1975         }
1976
1977         team = netdev_priv(dev);
1978         mutex_lock(&team->lock);
1979         return team;
1980 }
1981
1982 static void team_nl_team_put(struct team *team)
1983 {
1984         mutex_unlock(&team->lock);
1985         dev_put(team->dev);
1986 }
1987
1988 typedef int team_nl_send_func_t(struct sk_buff *skb,
1989                                 struct team *team, u32 portid);
1990
1991 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
1992 {
1993         return genlmsg_unicast(dev_net(team->dev), skb, portid);
1994 }
1995
1996 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
1997                                        struct team_option_inst *opt_inst)
1998 {
1999         struct nlattr *option_item;
2000         struct team_option *option = opt_inst->option;
2001         struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2002         struct team_gsetter_ctx ctx;
2003         int err;
2004
2005         ctx.info = opt_inst_info;
2006         err = team_option_get(team, opt_inst, &ctx);
2007         if (err)
2008                 return err;
2009
2010         option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
2011         if (!option_item)
2012                 return -EMSGSIZE;
2013
2014         if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2015                 goto nest_cancel;
2016         if (opt_inst_info->port &&
2017             nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2018                         opt_inst_info->port->dev->ifindex))
2019                 goto nest_cancel;
2020         if (opt_inst->option->array_size &&
2021             nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2022                         opt_inst_info->array_index))
2023                 goto nest_cancel;
2024
2025         switch (option->type) {
2026         case TEAM_OPTION_TYPE_U32:
2027                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2028                         goto nest_cancel;
2029                 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2030                         goto nest_cancel;
2031                 break;
2032         case TEAM_OPTION_TYPE_STRING:
2033                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2034                         goto nest_cancel;
2035                 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2036                                    ctx.data.str_val))
2037                         goto nest_cancel;
2038                 break;
2039         case TEAM_OPTION_TYPE_BINARY:
2040                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2041                         goto nest_cancel;
2042                 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2043                             ctx.data.bin_val.ptr))
2044                         goto nest_cancel;
2045                 break;
2046         case TEAM_OPTION_TYPE_BOOL:
2047                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2048                         goto nest_cancel;
2049                 if (ctx.data.bool_val &&
2050                     nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2051                         goto nest_cancel;
2052                 break;
2053         case TEAM_OPTION_TYPE_S32:
2054                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2055                         goto nest_cancel;
2056                 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2057                         goto nest_cancel;
2058                 break;
2059         default:
2060                 BUG();
2061         }
2062         if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2063                 goto nest_cancel;
2064         if (opt_inst->changed) {
2065                 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2066                         goto nest_cancel;
2067                 opt_inst->changed = false;
2068         }
2069         nla_nest_end(skb, option_item);
2070         return 0;
2071
2072 nest_cancel:
2073         nla_nest_cancel(skb, option_item);
2074         return -EMSGSIZE;
2075 }
2076
2077 static int __send_and_alloc_skb(struct sk_buff **pskb,
2078                                 struct team *team, u32 portid,
2079                                 team_nl_send_func_t *send_func)
2080 {
2081         int err;
2082
2083         if (*pskb) {
2084                 err = send_func(*pskb, team, portid);
2085                 if (err)
2086                         return err;
2087         }
2088         *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2089         if (!*pskb)
2090                 return -ENOMEM;
2091         return 0;
2092 }
2093
2094 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2095                                     int flags, team_nl_send_func_t *send_func,
2096                                     struct list_head *sel_opt_inst_list)
2097 {
2098         struct nlattr *option_list;
2099         struct nlmsghdr *nlh;
2100         void *hdr;
2101         struct team_option_inst *opt_inst;
2102         int err;
2103         struct sk_buff *skb = NULL;
2104         bool incomplete;
2105         int i;
2106
2107         opt_inst = list_first_entry(sel_opt_inst_list,
2108                                     struct team_option_inst, tmp_list);
2109
2110 start_again:
2111         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2112         if (err)
2113                 return err;
2114
2115         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2116                           TEAM_CMD_OPTIONS_GET);
2117         if (!hdr)
2118                 return -EMSGSIZE;
2119
2120         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2121                 goto nla_put_failure;
2122         option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2123         if (!option_list)
2124                 goto nla_put_failure;
2125
2126         i = 0;
2127         incomplete = false;
2128         list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2129                 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2130                 if (err) {
2131                         if (err == -EMSGSIZE) {
2132                                 if (!i)
2133                                         goto errout;
2134                                 incomplete = true;
2135                                 break;
2136                         }
2137                         goto errout;
2138                 }
2139                 i++;
2140         }
2141
2142         nla_nest_end(skb, option_list);
2143         genlmsg_end(skb, hdr);
2144         if (incomplete)
2145                 goto start_again;
2146
2147 send_done:
2148         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2149         if (!nlh) {
2150                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2151                 if (err)
2152                         goto errout;
2153                 goto send_done;
2154         }
2155
2156         return send_func(skb, team, portid);
2157
2158 nla_put_failure:
2159         err = -EMSGSIZE;
2160 errout:
2161         genlmsg_cancel(skb, hdr);
2162         nlmsg_free(skb);
2163         return err;
2164 }
2165
2166 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2167 {
2168         struct team *team;
2169         struct team_option_inst *opt_inst;
2170         int err;
2171         LIST_HEAD(sel_opt_inst_list);
2172
2173         team = team_nl_team_get(info);
2174         if (!team)
2175                 return -EINVAL;
2176
2177         list_for_each_entry(opt_inst, &team->option_inst_list, list)
2178                 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2179         err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2180                                        NLM_F_ACK, team_nl_send_unicast,
2181                                        &sel_opt_inst_list);
2182
2183         team_nl_team_put(team);
2184
2185         return err;
2186 }
2187
2188 static int team_nl_send_event_options_get(struct team *team,
2189                                           struct list_head *sel_opt_inst_list);
2190
2191 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2192 {
2193         struct team *team;
2194         int err = 0;
2195         int i;
2196         struct nlattr *nl_option;
2197         LIST_HEAD(opt_inst_list);
2198
2199         team = team_nl_team_get(info);
2200         if (!team)
2201                 return -EINVAL;
2202
2203         err = -EINVAL;
2204         if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2205                 err = -EINVAL;
2206                 goto team_put;
2207         }
2208
2209         nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2210                 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2211                 struct nlattr *attr;
2212                 struct nlattr *attr_data;
2213                 enum team_option_type opt_type;
2214                 int opt_port_ifindex = 0; /* != 0 for per-port options */
2215                 u32 opt_array_index = 0;
2216                 bool opt_is_array = false;
2217                 struct team_option_inst *opt_inst;
2218                 char *opt_name;
2219                 bool opt_found = false;
2220
2221                 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2222                         err = -EINVAL;
2223                         goto team_put;
2224                 }
2225                 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2226                                        nl_option, team_nl_option_policy);
2227                 if (err)
2228                         goto team_put;
2229                 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2230                     !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2231                         err = -EINVAL;
2232                         goto team_put;
2233                 }
2234                 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2235                 case NLA_U32:
2236                         opt_type = TEAM_OPTION_TYPE_U32;
2237                         break;
2238                 case NLA_STRING:
2239                         opt_type = TEAM_OPTION_TYPE_STRING;
2240                         break;
2241                 case NLA_BINARY:
2242                         opt_type = TEAM_OPTION_TYPE_BINARY;
2243                         break;
2244                 case NLA_FLAG:
2245                         opt_type = TEAM_OPTION_TYPE_BOOL;
2246                         break;
2247                 case NLA_S32:
2248                         opt_type = TEAM_OPTION_TYPE_S32;
2249                         break;
2250                 default:
2251                         goto team_put;
2252                 }
2253
2254                 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2255                 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2256                         err = -EINVAL;
2257                         goto team_put;
2258                 }
2259
2260                 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2261                 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2262                 if (attr)
2263                         opt_port_ifindex = nla_get_u32(attr);
2264
2265                 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2266                 if (attr) {
2267                         opt_is_array = true;
2268                         opt_array_index = nla_get_u32(attr);
2269                 }
2270
2271                 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2272                         struct team_option *option = opt_inst->option;
2273                         struct team_gsetter_ctx ctx;
2274                         struct team_option_inst_info *opt_inst_info;
2275                         int tmp_ifindex;
2276
2277                         opt_inst_info = &opt_inst->info;
2278                         tmp_ifindex = opt_inst_info->port ?
2279                                       opt_inst_info->port->dev->ifindex : 0;
2280                         if (option->type != opt_type ||
2281                             strcmp(option->name, opt_name) ||
2282                             tmp_ifindex != opt_port_ifindex ||
2283                             (option->array_size && !opt_is_array) ||
2284                             opt_inst_info->array_index != opt_array_index)
2285                                 continue;
2286                         opt_found = true;
2287                         ctx.info = opt_inst_info;
2288                         switch (opt_type) {
2289                         case TEAM_OPTION_TYPE_U32:
2290                                 ctx.data.u32_val = nla_get_u32(attr_data);
2291                                 break;
2292                         case TEAM_OPTION_TYPE_STRING:
2293                                 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2294                                         err = -EINVAL;
2295                                         goto team_put;
2296                                 }
2297                                 ctx.data.str_val = nla_data(attr_data);
2298                                 break;
2299                         case TEAM_OPTION_TYPE_BINARY:
2300                                 ctx.data.bin_val.len = nla_len(attr_data);
2301                                 ctx.data.bin_val.ptr = nla_data(attr_data);
2302                                 break;
2303                         case TEAM_OPTION_TYPE_BOOL:
2304                                 ctx.data.bool_val = attr_data ? true : false;
2305                                 break;
2306                         case TEAM_OPTION_TYPE_S32:
2307                                 ctx.data.s32_val = nla_get_s32(attr_data);
2308                                 break;
2309                         default:
2310                                 BUG();
2311                         }
2312                         err = team_option_set(team, opt_inst, &ctx);
2313                         if (err)
2314                                 goto team_put;
2315                         opt_inst->changed = true;
2316                         list_add(&opt_inst->tmp_list, &opt_inst_list);
2317                 }
2318                 if (!opt_found) {
2319                         err = -ENOENT;
2320                         goto team_put;
2321                 }
2322         }
2323
2324         err = team_nl_send_event_options_get(team, &opt_inst_list);
2325
2326 team_put:
2327         team_nl_team_put(team);
2328
2329         return err;
2330 }
2331
2332 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2333                                      struct team_port *port)
2334 {
2335         struct nlattr *port_item;
2336
2337         port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2338         if (!port_item)
2339                 goto nest_cancel;
2340         if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2341                 goto nest_cancel;
2342         if (port->changed) {
2343                 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2344                         goto nest_cancel;
2345                 port->changed = false;
2346         }
2347         if ((port->removed &&
2348              nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2349             (port->state.linkup &&
2350              nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2351             nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2352             nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2353                 goto nest_cancel;
2354         nla_nest_end(skb, port_item);
2355         return 0;
2356
2357 nest_cancel:
2358         nla_nest_cancel(skb, port_item);
2359         return -EMSGSIZE;
2360 }
2361
2362 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2363                                       int flags, team_nl_send_func_t *send_func,
2364                                       struct team_port *one_port)
2365 {
2366         struct nlattr *port_list;
2367         struct nlmsghdr *nlh;
2368         void *hdr;
2369         struct team_port *port;
2370         int err;
2371         struct sk_buff *skb = NULL;
2372         bool incomplete;
2373         int i;
2374
2375         port = list_first_entry(&team->port_list, struct team_port, list);
2376
2377 start_again:
2378         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2379         if (err)
2380                 return err;
2381
2382         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2383                           TEAM_CMD_PORT_LIST_GET);
2384         if (!hdr)
2385                 return -EMSGSIZE;
2386
2387         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2388                 goto nla_put_failure;
2389         port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2390         if (!port_list)
2391                 goto nla_put_failure;
2392
2393         i = 0;
2394         incomplete = false;
2395
2396         /* If one port is selected, called wants to send port list containing
2397          * only this port. Otherwise go through all listed ports and send all
2398          */
2399         if (one_port) {
2400                 err = team_nl_fill_one_port_get(skb, one_port);
2401                 if (err)
2402                         goto errout;
2403         } else {
2404                 list_for_each_entry(port, &team->port_list, list) {
2405                         err = team_nl_fill_one_port_get(skb, port);
2406                         if (err) {
2407                                 if (err == -EMSGSIZE) {
2408                                         if (!i)
2409                                                 goto errout;
2410                                         incomplete = true;
2411                                         break;
2412                                 }
2413                                 goto errout;
2414                         }
2415                         i++;
2416                 }
2417         }
2418
2419         nla_nest_end(skb, port_list);
2420         genlmsg_end(skb, hdr);
2421         if (incomplete)
2422                 goto start_again;
2423
2424 send_done:
2425         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2426         if (!nlh) {
2427                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2428                 if (err)
2429                         goto errout;
2430                 goto send_done;
2431         }
2432
2433         return send_func(skb, team, portid);
2434
2435 nla_put_failure:
2436         err = -EMSGSIZE;
2437 errout:
2438         genlmsg_cancel(skb, hdr);
2439         nlmsg_free(skb);
2440         return err;
2441 }
2442
2443 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2444                                      struct genl_info *info)
2445 {
2446         struct team *team;
2447         int err;
2448
2449         team = team_nl_team_get(info);
2450         if (!team)
2451                 return -EINVAL;
2452
2453         err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2454                                          NLM_F_ACK, team_nl_send_unicast, NULL);
2455
2456         team_nl_team_put(team);
2457
2458         return err;
2459 }
2460
2461 static struct genl_ops team_nl_ops[] = {
2462         {
2463                 .cmd = TEAM_CMD_NOOP,
2464                 .doit = team_nl_cmd_noop,
2465                 .policy = team_nl_policy,
2466         },
2467         {
2468                 .cmd = TEAM_CMD_OPTIONS_SET,
2469                 .doit = team_nl_cmd_options_set,
2470                 .policy = team_nl_policy,
2471                 .flags = GENL_ADMIN_PERM,
2472         },
2473         {
2474                 .cmd = TEAM_CMD_OPTIONS_GET,
2475                 .doit = team_nl_cmd_options_get,
2476                 .policy = team_nl_policy,
2477                 .flags = GENL_ADMIN_PERM,
2478         },
2479         {
2480                 .cmd = TEAM_CMD_PORT_LIST_GET,
2481                 .doit = team_nl_cmd_port_list_get,
2482                 .policy = team_nl_policy,
2483                 .flags = GENL_ADMIN_PERM,
2484         },
2485 };
2486
2487 static struct genl_multicast_group team_change_event_mcgrp = {
2488         .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME,
2489 };
2490
2491 static int team_nl_send_multicast(struct sk_buff *skb,
2492                                   struct team *team, u32 portid)
2493 {
2494         return genlmsg_multicast_netns(dev_net(team->dev), skb, 0,
2495                                        team_change_event_mcgrp.id, GFP_KERNEL);
2496 }
2497
2498 static int team_nl_send_event_options_get(struct team *team,
2499                                           struct list_head *sel_opt_inst_list)
2500 {
2501         return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2502                                         sel_opt_inst_list);
2503 }
2504
2505 static int team_nl_send_event_port_get(struct team *team,
2506                                        struct team_port *port)
2507 {
2508         return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2509                                           port);
2510 }
2511
2512 static int team_nl_init(void)
2513 {
2514         int err;
2515
2516         err = genl_register_family_with_ops(&team_nl_family, team_nl_ops,
2517                                             ARRAY_SIZE(team_nl_ops));
2518         if (err)
2519                 return err;
2520
2521         err = genl_register_mc_group(&team_nl_family, &team_change_event_mcgrp);
2522         if (err)
2523                 goto err_change_event_grp_reg;
2524
2525         return 0;
2526
2527 err_change_event_grp_reg:
2528         genl_unregister_family(&team_nl_family);
2529
2530         return err;
2531 }
2532
2533 static void team_nl_fini(void)
2534 {
2535         genl_unregister_family(&team_nl_family);
2536 }
2537
2538
2539 /******************
2540  * Change checkers
2541  ******************/
2542
2543 static void __team_options_change_check(struct team *team)
2544 {
2545         int err;
2546         struct team_option_inst *opt_inst;
2547         LIST_HEAD(sel_opt_inst_list);
2548
2549         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2550                 if (opt_inst->changed)
2551                         list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2552         }
2553         err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2554         if (err && err != -ESRCH)
2555                 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2556                             err);
2557 }
2558
2559 /* rtnl lock is held */
2560
2561 static void __team_port_change_send(struct team_port *port, bool linkup)
2562 {
2563         int err;
2564
2565         port->changed = true;
2566         port->state.linkup = linkup;
2567         team_refresh_port_linkup(port);
2568         if (linkup) {
2569                 struct ethtool_cmd ecmd;
2570
2571                 err = __ethtool_get_settings(port->dev, &ecmd);
2572                 if (!err) {
2573                         port->state.speed = ethtool_cmd_speed(&ecmd);
2574                         port->state.duplex = ecmd.duplex;
2575                         goto send_event;
2576                 }
2577         }
2578         port->state.speed = 0;
2579         port->state.duplex = 0;
2580
2581 send_event:
2582         err = team_nl_send_event_port_get(port->team, port);
2583         if (err && err != -ESRCH)
2584                 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2585                             port->dev->name, err);
2586
2587 }
2588
2589 static void __team_carrier_check(struct team *team)
2590 {
2591         struct team_port *port;
2592         bool team_linkup;
2593
2594         if (team->user_carrier_enabled)
2595                 return;
2596
2597         team_linkup = false;
2598         list_for_each_entry(port, &team->port_list, list) {
2599                 if (port->linkup) {
2600                         team_linkup = true;
2601                         break;
2602                 }
2603         }
2604
2605         if (team_linkup)
2606                 netif_carrier_on(team->dev);
2607         else
2608                 netif_carrier_off(team->dev);
2609 }
2610
2611 static void __team_port_change_check(struct team_port *port, bool linkup)
2612 {
2613         if (port->state.linkup != linkup)
2614                 __team_port_change_send(port, linkup);
2615         __team_carrier_check(port->team);
2616 }
2617
2618 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2619 {
2620         __team_port_change_send(port, linkup);
2621         __team_carrier_check(port->team);
2622 }
2623
2624 static void __team_port_change_port_removed(struct team_port *port)
2625 {
2626         port->removed = true;
2627         __team_port_change_send(port, false);
2628         __team_carrier_check(port->team);
2629 }
2630
2631 static void team_port_change_check(struct team_port *port, bool linkup)
2632 {
2633         struct team *team = port->team;
2634
2635         mutex_lock(&team->lock);
2636         __team_port_change_check(port, linkup);
2637         mutex_unlock(&team->lock);
2638 }
2639
2640
2641 /************************************
2642  * Net device notifier event handler
2643  ************************************/
2644
2645 static int team_device_event(struct notifier_block *unused,
2646                              unsigned long event, void *ptr)
2647 {
2648         struct net_device *dev = (struct net_device *) ptr;
2649         struct team_port *port;
2650
2651         port = team_port_get_rtnl(dev);
2652         if (!port)
2653                 return NOTIFY_DONE;
2654
2655         switch (event) {
2656         case NETDEV_UP:
2657                 if (netif_carrier_ok(dev))
2658                         team_port_change_check(port, true);
2659         case NETDEV_DOWN:
2660                 team_port_change_check(port, false);
2661         case NETDEV_CHANGE:
2662                 if (netif_running(port->dev))
2663                         team_port_change_check(port,
2664                                                !!netif_carrier_ok(port->dev));
2665                 break;
2666         case NETDEV_UNREGISTER:
2667                 team_del_slave(port->team->dev, dev);
2668                 break;
2669         case NETDEV_FEAT_CHANGE:
2670                 team_compute_features(port->team);
2671                 break;
2672         case NETDEV_CHANGEMTU:
2673                 /* Forbid to change mtu of underlaying device */
2674                 return NOTIFY_BAD;
2675         case NETDEV_PRE_TYPE_CHANGE:
2676                 /* Forbid to change type of underlaying device */
2677                 return NOTIFY_BAD;
2678         }
2679         return NOTIFY_DONE;
2680 }
2681
2682 static struct notifier_block team_notifier_block __read_mostly = {
2683         .notifier_call = team_device_event,
2684 };
2685
2686
2687 /***********************
2688  * Module init and exit
2689  ***********************/
2690
2691 static int __init team_module_init(void)
2692 {
2693         int err;
2694
2695         register_netdevice_notifier(&team_notifier_block);
2696
2697         err = rtnl_link_register(&team_link_ops);
2698         if (err)
2699                 goto err_rtnl_reg;
2700
2701         err = team_nl_init();
2702         if (err)
2703                 goto err_nl_init;
2704
2705         return 0;
2706
2707 err_nl_init:
2708         rtnl_link_unregister(&team_link_ops);
2709
2710 err_rtnl_reg:
2711         unregister_netdevice_notifier(&team_notifier_block);
2712
2713         return err;
2714 }
2715
2716 static void __exit team_module_exit(void)
2717 {
2718         team_nl_fini();
2719         rtnl_link_unregister(&team_link_ops);
2720         unregister_netdevice_notifier(&team_notifier_block);
2721 }
2722
2723 module_init(team_module_init);
2724 module_exit(team_module_exit);
2725
2726 MODULE_LICENSE("GPL v2");
2727 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
2728 MODULE_DESCRIPTION("Ethernet team device driver");
2729 MODULE_ALIAS_RTNL_LINK(DRV_NAME);