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