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_port_added(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         if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
 993             vlan_uses_dev(dev)) {
 994                 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
 995                            portname);
 996                 return -EPERM;
 997         }
 998
 999         err = team_dev_type_check_change(dev, port_dev);
1000         if (err)
1001                 return err;
1002
1003         if (port_dev->flags & IFF_UP) {
1004                 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1005                            portname);
1006                 return -EBUSY;
1007         }
1008
1009         port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1010                        GFP_KERNEL);
1011         if (!port)
1012                 return -ENOMEM;
1013
1014         port->dev = port_dev;
1015         port->team = team;
1016         INIT_LIST_HEAD(&port->qom_list);
1017
1018         port->orig.mtu = port_dev->mtu;
1019         err = dev_set_mtu(port_dev, dev->mtu);
1020         if (err) {
1021                 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1022                 goto err_set_mtu;
1023         }
1024
1025         memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1026
1027         err = team_port_enter(team, port);
1028         if (err) {
1029                 netdev_err(dev, "Device %s failed to enter team mode\n",
1030                            portname);
1031                 goto err_port_enter;
1032         }
1033
1034         err = dev_open(port_dev);
1035         if (err) {
1036                 netdev_dbg(dev, "Device %s opening failed\n",
1037                            portname);
1038                 goto err_dev_open;
1039         }
1040
1041         err = vlan_vids_add_by_dev(port_dev, dev);
1042         if (err) {
1043                 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1044                                 portname);
1045                 goto err_vids_add;
1046         }
1047
1048         if (team_netpoll_info(team)) {
1049                 err = team_port_enable_netpoll(team, port, GFP_KERNEL);
1050                 if (err) {
1051                         netdev_err(dev, "Failed to enable netpoll on device %s\n",
1052                                    portname);
1053                         goto err_enable_netpoll;
1054                 }
1055         }
1056
1057         err = netdev_set_master(port_dev, dev);
1058         if (err) {
1059                 netdev_err(dev, "Device %s failed to set master\n", portname);
1060                 goto err_set_master;
1061         }
1062
1063         err = netdev_rx_handler_register(port_dev, team_handle_frame,
1064                                          port);
1065         if (err) {
1066                 netdev_err(dev, "Device %s failed to register rx_handler\n",
1067                            portname);
1068                 goto err_handler_register;
1069         }
1070
1071         err = __team_option_inst_add_port(team, port);
1072         if (err) {
1073                 netdev_err(dev, "Device %s failed to add per-port options\n",
1074                            portname);
1075                 goto err_option_port_add;
1076         }
1077
1078         port->index = -1;
1079         team_port_enable(team, port);
1080         list_add_tail_rcu(&port->list, &team->port_list);
1081         __team_compute_features(team);
1082         __team_port_change_port_added(port, !!netif_carrier_ok(port_dev));
1083         __team_options_change_check(team);
1084
1085         netdev_info(dev, "Port device %s added\n", portname);
1086
1087         return 0;
1088
1089 err_option_port_add:
1090         netdev_rx_handler_unregister(port_dev);
1091
1092 err_handler_register:
1093         netdev_set_master(port_dev, NULL);
1094
1095 err_set_master:
1096         team_port_disable_netpoll(port);
1097
1098 err_enable_netpoll:
1099         vlan_vids_del_by_dev(port_dev, dev);
1100
1101 err_vids_add:
1102         dev_close(port_dev);
1103
1104 err_dev_open:
1105         team_port_leave(team, port);
1106         team_port_set_orig_dev_addr(port);
1107
1108 err_port_enter:
1109         dev_set_mtu(port_dev, port->orig.mtu);
1110
1111 err_set_mtu:
1112         kfree(port);
1113
1114         return err;
1115 }
1116
1117 static void __team_port_change_port_removed(struct team_port *port);
1118
1119 static int team_port_del(struct team *team, struct net_device *port_dev)
1120 {
1121         struct net_device *dev = team->dev;
1122         struct team_port *port;
1123         char *portname = port_dev->name;
1124
1125         port = team_port_get_rtnl(port_dev);
1126         if (!port || !team_port_find(team, port)) {
1127                 netdev_err(dev, "Device %s does not act as a port of this team\n",
1128                            portname);
1129                 return -ENOENT;
1130         }
1131
1132         __team_option_inst_mark_removed_port(team, port);
1133         __team_options_change_check(team);
1134         __team_option_inst_del_port(team, port);
1135         __team_port_change_port_removed(port);
1136         team_port_disable(team, port);
1137         list_del_rcu(&port->list);
1138         netdev_rx_handler_unregister(port_dev);
1139         netdev_set_master(port_dev, NULL);
1140         team_port_disable_netpoll(port);
1141         vlan_vids_del_by_dev(port_dev, dev);
1142         dev_close(port_dev);
1143         team_port_leave(team, port);
1144         team_port_set_orig_dev_addr(port);
1145         dev_set_mtu(port_dev, port->orig.mtu);
1146         synchronize_rcu();
1147         kfree(port);
1148         netdev_info(dev, "Port device %s removed\n", portname);
1149         __team_compute_features(team);
1150
1151         return 0;
1152 }
1153
1154
1155 /*****************
1156  * Net device ops
1157  *****************/
1158
1159 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1160 {
1161         ctx->data.str_val = team->mode->kind;
1162         return 0;
1163 }
1164
1165 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1166 {
1167         return team_change_mode(team, ctx->data.str_val);
1168 }
1169
1170 static int team_port_en_option_get(struct team *team,
1171                                    struct team_gsetter_ctx *ctx)
1172 {
1173         struct team_port *port = ctx->info->port;
1174
1175         ctx->data.bool_val = team_port_enabled(port);
1176         return 0;
1177 }
1178
1179 static int team_port_en_option_set(struct team *team,
1180                                    struct team_gsetter_ctx *ctx)
1181 {
1182         struct team_port *port = ctx->info->port;
1183
1184         if (ctx->data.bool_val)
1185                 team_port_enable(team, port);
1186         else
1187                 team_port_disable(team, port);
1188         return 0;
1189 }
1190
1191 static int team_user_linkup_option_get(struct team *team,
1192                                        struct team_gsetter_ctx *ctx)
1193 {
1194         struct team_port *port = ctx->info->port;
1195
1196         ctx->data.bool_val = port->user.linkup;
1197         return 0;
1198 }
1199
1200 static int team_user_linkup_option_set(struct team *team,
1201                                        struct team_gsetter_ctx *ctx)
1202 {
1203         struct team_port *port = ctx->info->port;
1204
1205         port->user.linkup = ctx->data.bool_val;
1206         team_refresh_port_linkup(port);
1207         return 0;
1208 }
1209
1210 static int team_user_linkup_en_option_get(struct team *team,
1211                                           struct team_gsetter_ctx *ctx)
1212 {
1213         struct team_port *port = ctx->info->port;
1214
1215         ctx->data.bool_val = port->user.linkup_enabled;
1216         return 0;
1217 }
1218
1219 static int team_user_linkup_en_option_set(struct team *team,
1220                                           struct team_gsetter_ctx *ctx)
1221 {
1222         struct team_port *port = ctx->info->port;
1223
1224         port->user.linkup_enabled = ctx->data.bool_val;
1225         team_refresh_port_linkup(port);
1226         return 0;
1227 }
1228
1229 static int team_priority_option_get(struct team *team,
1230                                     struct team_gsetter_ctx *ctx)
1231 {
1232         struct team_port *port = ctx->info->port;
1233
1234         ctx->data.s32_val = port->priority;
1235         return 0;
1236 }
1237
1238 static int team_priority_option_set(struct team *team,
1239                                     struct team_gsetter_ctx *ctx)
1240 {
1241         struct team_port *port = ctx->info->port;
1242
1243         port->priority = ctx->data.s32_val;
1244         team_queue_override_port_refresh(team, port);
1245         return 0;
1246 }
1247
1248 static int team_queue_id_option_get(struct team *team,
1249                                     struct team_gsetter_ctx *ctx)
1250 {
1251         struct team_port *port = ctx->info->port;
1252
1253         ctx->data.u32_val = port->queue_id;
1254         return 0;
1255 }
1256
1257 static int team_queue_id_option_set(struct team *team,
1258                                     struct team_gsetter_ctx *ctx)
1259 {
1260         struct team_port *port = ctx->info->port;
1261
1262         if (port->queue_id == ctx->data.u32_val)
1263                 return 0;
1264         if (ctx->data.u32_val >= team->dev->real_num_tx_queues)
1265                 return -EINVAL;
1266         port->queue_id = ctx->data.u32_val;
1267         team_queue_override_port_refresh(team, port);
1268         return 0;
1269 }
1270
1271
1272 static const struct team_option team_options[] = {
1273         {
1274                 .name = "mode",
1275                 .type = TEAM_OPTION_TYPE_STRING,
1276                 .getter = team_mode_option_get,
1277                 .setter = team_mode_option_set,
1278         },
1279         {
1280                 .name = "enabled",
1281                 .type = TEAM_OPTION_TYPE_BOOL,
1282                 .per_port = true,
1283                 .getter = team_port_en_option_get,
1284                 .setter = team_port_en_option_set,
1285         },
1286         {
1287                 .name = "user_linkup",
1288                 .type = TEAM_OPTION_TYPE_BOOL,
1289                 .per_port = true,
1290                 .getter = team_user_linkup_option_get,
1291                 .setter = team_user_linkup_option_set,
1292         },
1293         {
1294                 .name = "user_linkup_enabled",
1295                 .type = TEAM_OPTION_TYPE_BOOL,
1296                 .per_port = true,
1297                 .getter = team_user_linkup_en_option_get,
1298                 .setter = team_user_linkup_en_option_set,
1299         },
1300         {
1301                 .name = "priority",
1302                 .type = TEAM_OPTION_TYPE_S32,
1303                 .per_port = true,
1304                 .getter = team_priority_option_get,
1305                 .setter = team_priority_option_set,
1306         },
1307         {
1308                 .name = "queue_id",
1309                 .type = TEAM_OPTION_TYPE_U32,
1310                 .per_port = true,
1311                 .getter = team_queue_id_option_get,
1312                 .setter = team_queue_id_option_set,
1313         },
1314 };
1315
1316 static struct lock_class_key team_netdev_xmit_lock_key;
1317 static struct lock_class_key team_netdev_addr_lock_key;
1318 static struct lock_class_key team_tx_busylock_key;
1319
1320 static void team_set_lockdep_class_one(struct net_device *dev,
1321                                        struct netdev_queue *txq,
1322                                        void *unused)
1323 {
1324         lockdep_set_class(&txq->_xmit_lock, &team_netdev_xmit_lock_key);
1325 }
1326
1327 static void team_set_lockdep_class(struct net_device *dev)
1328 {
1329         lockdep_set_class(&dev->addr_list_lock, &team_netdev_addr_lock_key);
1330         netdev_for_each_tx_queue(dev, team_set_lockdep_class_one, NULL);
1331         dev->qdisc_tx_busylock = &team_tx_busylock_key;
1332 }
1333
1334 static int team_init(struct net_device *dev)
1335 {
1336         struct team *team = netdev_priv(dev);
1337         int i;
1338         int err;
1339
1340         team->dev = dev;
1341         mutex_init(&team->lock);
1342         team_set_no_mode(team);
1343
1344         team->pcpu_stats = alloc_percpu(struct team_pcpu_stats);
1345         if (!team->pcpu_stats)
1346                 return -ENOMEM;
1347
1348         for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1349                 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1350         INIT_LIST_HEAD(&team->port_list);
1351         err = team_queue_override_init(team);
1352         if (err)
1353                 goto err_team_queue_override_init;
1354
1355         team_adjust_ops(team);
1356
1357         INIT_LIST_HEAD(&team->option_list);
1358         INIT_LIST_HEAD(&team->option_inst_list);
1359         err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1360         if (err)
1361                 goto err_options_register;
1362         netif_carrier_off(dev);
1363
1364         team_set_lockdep_class(dev);
1365
1366         return 0;
1367
1368 err_options_register:
1369         team_queue_override_fini(team);
1370 err_team_queue_override_init:
1371         free_percpu(team->pcpu_stats);
1372
1373         return err;
1374 }
1375
1376 static void team_uninit(struct net_device *dev)
1377 {
1378         struct team *team = netdev_priv(dev);
1379         struct team_port *port;
1380         struct team_port *tmp;
1381
1382         mutex_lock(&team->lock);
1383         list_for_each_entry_safe(port, tmp, &team->port_list, list)
1384                 team_port_del(team, port->dev);
1385
1386         __team_change_mode(team, NULL); /* cleanup */
1387         __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1388         team_queue_override_fini(team);
1389         mutex_unlock(&team->lock);
1390 }
1391
1392 static void team_destructor(struct net_device *dev)
1393 {
1394         struct team *team = netdev_priv(dev);
1395
1396         free_percpu(team->pcpu_stats);
1397         free_netdev(dev);
1398 }
1399
1400 static int team_open(struct net_device *dev)
1401 {
1402         netif_carrier_on(dev);
1403         return 0;
1404 }
1405
1406 static int team_close(struct net_device *dev)
1407 {
1408         netif_carrier_off(dev);
1409         return 0;
1410 }
1411
1412 /*
1413  * note: already called with rcu_read_lock
1414  */
1415 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1416 {
1417         struct team *team = netdev_priv(dev);
1418         bool tx_success;
1419         unsigned int len = skb->len;
1420
1421         tx_success = team_queue_override_transmit(team, skb);
1422         if (!tx_success)
1423                 tx_success = team->ops.transmit(team, skb);
1424         if (tx_success) {
1425                 struct team_pcpu_stats *pcpu_stats;
1426
1427                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1428                 u64_stats_update_begin(&pcpu_stats->syncp);
1429                 pcpu_stats->tx_packets++;
1430                 pcpu_stats->tx_bytes += len;
1431                 u64_stats_update_end(&pcpu_stats->syncp);
1432         } else {
1433                 this_cpu_inc(team->pcpu_stats->tx_dropped);
1434         }
1435
1436         return NETDEV_TX_OK;
1437 }
1438
1439 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb)
1440 {
1441         /*
1442          * This helper function exists to help dev_pick_tx get the correct
1443          * destination queue.  Using a helper function skips a call to
1444          * skb_tx_hash and will put the skbs in the queue we expect on their
1445          * way down to the team driver.
1446          */
1447         u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1448
1449         /*
1450          * Save the original txq to restore before passing to the driver
1451          */
1452         qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1453
1454         if (unlikely(txq >= dev->real_num_tx_queues)) {
1455                 do {
1456                         txq -= dev->real_num_tx_queues;
1457                 } while (txq >= dev->real_num_tx_queues);
1458         }
1459         return txq;
1460 }
1461
1462 static void team_change_rx_flags(struct net_device *dev, int change)
1463 {
1464         struct team *team = netdev_priv(dev);
1465         struct team_port *port;
1466         int inc;
1467
1468         rcu_read_lock();
1469         list_for_each_entry_rcu(port, &team->port_list, list) {
1470                 if (change & IFF_PROMISC) {
1471                         inc = dev->flags & IFF_PROMISC ? 1 : -1;
1472                         dev_set_promiscuity(port->dev, inc);
1473                 }
1474                 if (change & IFF_ALLMULTI) {
1475                         inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1476                         dev_set_allmulti(port->dev, inc);
1477                 }
1478         }
1479         rcu_read_unlock();
1480 }
1481
1482 static void team_set_rx_mode(struct net_device *dev)
1483 {
1484         struct team *team = netdev_priv(dev);
1485         struct team_port *port;
1486
1487         rcu_read_lock();
1488         list_for_each_entry_rcu(port, &team->port_list, list) {
1489                 dev_uc_sync(port->dev, dev);
1490                 dev_mc_sync(port->dev, dev);
1491         }
1492         rcu_read_unlock();
1493 }
1494
1495 static int team_set_mac_address(struct net_device *dev, void *p)
1496 {
1497         struct sockaddr *addr = p;
1498         struct team *team = netdev_priv(dev);
1499         struct team_port *port;
1500
1501         if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1502                 return -EADDRNOTAVAIL;
1503         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1504         dev->addr_assign_type &= ~NET_ADDR_RANDOM;
1505         rcu_read_lock();
1506         list_for_each_entry_rcu(port, &team->port_list, list)
1507                 if (team->ops.port_change_dev_addr)
1508                         team->ops.port_change_dev_addr(team, port);
1509         rcu_read_unlock();
1510         return 0;
1511 }
1512
1513 static int team_change_mtu(struct net_device *dev, int new_mtu)
1514 {
1515         struct team *team = netdev_priv(dev);
1516         struct team_port *port;
1517         int err;
1518
1519         /*
1520          * Alhough this is reader, it's guarded by team lock. It's not possible
1521          * to traverse list in reverse under rcu_read_lock
1522          */
1523         mutex_lock(&team->lock);
1524         list_for_each_entry(port, &team->port_list, list) {
1525                 err = dev_set_mtu(port->dev, new_mtu);
1526                 if (err) {
1527                         netdev_err(dev, "Device %s failed to change mtu",
1528                                    port->dev->name);
1529                         goto unwind;
1530                 }
1531         }
1532         mutex_unlock(&team->lock);
1533
1534         dev->mtu = new_mtu;
1535
1536         return 0;
1537
1538 unwind:
1539         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1540                 dev_set_mtu(port->dev, dev->mtu);
1541         mutex_unlock(&team->lock);
1542
1543         return err;
1544 }
1545
1546 static struct rtnl_link_stats64 *
1547 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1548 {
1549         struct team *team = netdev_priv(dev);
1550         struct team_pcpu_stats *p;
1551         u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1552         u32 rx_dropped = 0, tx_dropped = 0;
1553         unsigned int start;
1554         int i;
1555
1556         for_each_possible_cpu(i) {
1557                 p = per_cpu_ptr(team->pcpu_stats, i);
1558                 do {
1559                         start = u64_stats_fetch_begin_bh(&p->syncp);
1560                         rx_packets      = p->rx_packets;
1561                         rx_bytes        = p->rx_bytes;
1562                         rx_multicast    = p->rx_multicast;
1563                         tx_packets      = p->tx_packets;
1564                         tx_bytes        = p->tx_bytes;
1565                 } while (u64_stats_fetch_retry_bh(&p->syncp, start));
1566
1567                 stats->rx_packets       += rx_packets;
1568                 stats->rx_bytes         += rx_bytes;
1569                 stats->multicast        += rx_multicast;
1570                 stats->tx_packets       += tx_packets;
1571                 stats->tx_bytes         += tx_bytes;
1572                 /*
1573                  * rx_dropped & tx_dropped are u32, updated
1574                  * without syncp protection.
1575                  */
1576                 rx_dropped      += p->rx_dropped;
1577                 tx_dropped      += p->tx_dropped;
1578         }
1579         stats->rx_dropped       = rx_dropped;
1580         stats->tx_dropped       = tx_dropped;
1581         return stats;
1582 }
1583
1584 static int team_vlan_rx_add_vid(struct net_device *dev, uint16_t vid)
1585 {
1586         struct team *team = netdev_priv(dev);
1587         struct team_port *port;
1588         int err;
1589
1590         /*
1591          * Alhough this is reader, it's guarded by team lock. It's not possible
1592          * to traverse list in reverse under rcu_read_lock
1593          */
1594         mutex_lock(&team->lock);
1595         list_for_each_entry(port, &team->port_list, list) {
1596                 err = vlan_vid_add(port->dev, vid);
1597                 if (err)
1598                         goto unwind;
1599         }
1600         mutex_unlock(&team->lock);
1601
1602         return 0;
1603
1604 unwind:
1605         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1606                 vlan_vid_del(port->dev, vid);
1607         mutex_unlock(&team->lock);
1608
1609         return err;
1610 }
1611
1612 static int team_vlan_rx_kill_vid(struct net_device *dev, uint16_t vid)
1613 {
1614         struct team *team = netdev_priv(dev);
1615         struct team_port *port;
1616
1617         rcu_read_lock();
1618         list_for_each_entry_rcu(port, &team->port_list, list)
1619                 vlan_vid_del(port->dev, vid);
1620         rcu_read_unlock();
1621
1622         return 0;
1623 }
1624
1625 #ifdef CONFIG_NET_POLL_CONTROLLER
1626 static void team_poll_controller(struct net_device *dev)
1627 {
1628 }
1629
1630 static void __team_netpoll_cleanup(struct team *team)
1631 {
1632         struct team_port *port;
1633
1634         list_for_each_entry(port, &team->port_list, list)
1635                 team_port_disable_netpoll(port);
1636 }
1637
1638 static void team_netpoll_cleanup(struct net_device *dev)
1639 {
1640         struct team *team = netdev_priv(dev);
1641
1642         mutex_lock(&team->lock);
1643         __team_netpoll_cleanup(team);
1644         mutex_unlock(&team->lock);
1645 }
1646
1647 static int team_netpoll_setup(struct net_device *dev,
1648                               struct netpoll_info *npifo, gfp_t gfp)
1649 {
1650         struct team *team = netdev_priv(dev);
1651         struct team_port *port;
1652         int err = 0;
1653
1654         mutex_lock(&team->lock);
1655         list_for_each_entry(port, &team->port_list, list) {
1656                 err = team_port_enable_netpoll(team, port, gfp);
1657                 if (err) {
1658                         __team_netpoll_cleanup(team);
1659                         break;
1660                 }
1661         }
1662         mutex_unlock(&team->lock);
1663         return err;
1664 }
1665 #endif
1666
1667 static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
1668 {
1669         struct team *team = netdev_priv(dev);
1670         int err;
1671
1672         mutex_lock(&team->lock);
1673         err = team_port_add(team, port_dev);
1674         mutex_unlock(&team->lock);
1675         return err;
1676 }
1677
1678 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1679 {
1680         struct team *team = netdev_priv(dev);
1681         int err;
1682
1683         mutex_lock(&team->lock);
1684         err = team_port_del(team, port_dev);
1685         mutex_unlock(&team->lock);
1686         return err;
1687 }
1688
1689 static netdev_features_t team_fix_features(struct net_device *dev,
1690                                            netdev_features_t features)
1691 {
1692         struct team_port *port;
1693         struct team *team = netdev_priv(dev);
1694         netdev_features_t mask;
1695
1696         mask = features;
1697         features &= ~NETIF_F_ONE_FOR_ALL;
1698         features |= NETIF_F_ALL_FOR_ALL;
1699
1700         rcu_read_lock();
1701         list_for_each_entry_rcu(port, &team->port_list, list) {
1702                 features = netdev_increment_features(features,
1703                                                      port->dev->features,
1704                                                      mask);
1705         }
1706         rcu_read_unlock();
1707         return features;
1708 }
1709
1710 static const struct net_device_ops team_netdev_ops = {
1711         .ndo_init               = team_init,
1712         .ndo_uninit             = team_uninit,
1713         .ndo_open               = team_open,
1714         .ndo_stop               = team_close,
1715         .ndo_start_xmit         = team_xmit,
1716         .ndo_select_queue       = team_select_queue,
1717         .ndo_change_rx_flags    = team_change_rx_flags,
1718         .ndo_set_rx_mode        = team_set_rx_mode,
1719         .ndo_set_mac_address    = team_set_mac_address,
1720         .ndo_change_mtu         = team_change_mtu,
1721         .ndo_get_stats64        = team_get_stats64,
1722         .ndo_vlan_rx_add_vid    = team_vlan_rx_add_vid,
1723         .ndo_vlan_rx_kill_vid   = team_vlan_rx_kill_vid,
1724 #ifdef CONFIG_NET_POLL_CONTROLLER
1725         .ndo_poll_controller    = team_poll_controller,
1726         .ndo_netpoll_setup      = team_netpoll_setup,
1727         .ndo_netpoll_cleanup    = team_netpoll_cleanup,
1728 #endif
1729         .ndo_add_slave          = team_add_slave,
1730         .ndo_del_slave          = team_del_slave,
1731         .ndo_fix_features       = team_fix_features,
1732 };
1733
1734
1735 /***********************
1736  * rt netlink interface
1737  ***********************/
1738
1739 static void team_setup_by_port(struct net_device *dev,
1740                                struct net_device *port_dev)
1741 {
1742         dev->header_ops = port_dev->header_ops;
1743         dev->type = port_dev->type;
1744         dev->hard_header_len = port_dev->hard_header_len;
1745         dev->addr_len = port_dev->addr_len;
1746         dev->mtu = port_dev->mtu;
1747         memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
1748         memcpy(dev->dev_addr, port_dev->dev_addr, port_dev->addr_len);
1749         dev->addr_assign_type &= ~NET_ADDR_RANDOM;
1750 }
1751
1752 static int team_dev_type_check_change(struct net_device *dev,
1753                                       struct net_device *port_dev)
1754 {
1755         struct team *team = netdev_priv(dev);
1756         char *portname = port_dev->name;
1757         int err;
1758
1759         if (dev->type == port_dev->type)
1760                 return 0;
1761         if (!list_empty(&team->port_list)) {
1762                 netdev_err(dev, "Device %s is of different type\n", portname);
1763                 return -EBUSY;
1764         }
1765         err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
1766         err = notifier_to_errno(err);
1767         if (err) {
1768                 netdev_err(dev, "Refused to change device type\n");
1769                 return err;
1770         }
1771         dev_uc_flush(dev);
1772         dev_mc_flush(dev);
1773         team_setup_by_port(dev, port_dev);
1774         call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
1775         return 0;
1776 }
1777
1778 static void team_setup(struct net_device *dev)
1779 {
1780         ether_setup(dev);
1781
1782         dev->netdev_ops = &team_netdev_ops;
1783         dev->destructor = team_destructor;
1784         dev->tx_queue_len = 0;
1785         dev->flags |= IFF_MULTICAST;
1786         dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
1787
1788         /*
1789          * Indicate we support unicast address filtering. That way core won't
1790          * bring us to promisc mode in case a unicast addr is added.
1791          * Let this up to underlay drivers.
1792          */
1793         dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
1794
1795         dev->features |= NETIF_F_LLTX;
1796         dev->features |= NETIF_F_GRO;
1797         dev->hw_features = TEAM_VLAN_FEATURES |
1798                            NETIF_F_HW_VLAN_TX |
1799                            NETIF_F_HW_VLAN_RX |
1800                            NETIF_F_HW_VLAN_FILTER;
1801
1802         dev->hw_features &= ~(NETIF_F_ALL_CSUM & ~NETIF_F_HW_CSUM);
1803         dev->features |= dev->hw_features;
1804 }
1805
1806 static int team_newlink(struct net *src_net, struct net_device *dev,
1807                         struct nlattr *tb[], struct nlattr *data[])
1808 {
1809         int err;
1810
1811         if (tb[IFLA_ADDRESS] == NULL)
1812                 eth_hw_addr_random(dev);
1813
1814         err = register_netdevice(dev);
1815         if (err)
1816                 return err;
1817
1818         return 0;
1819 }
1820
1821 static int team_validate(struct nlattr *tb[], struct nlattr *data[])
1822 {
1823         if (tb[IFLA_ADDRESS]) {
1824                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
1825                         return -EINVAL;
1826                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
1827                         return -EADDRNOTAVAIL;
1828         }
1829         return 0;
1830 }
1831
1832 static unsigned int team_get_num_tx_queues(void)
1833 {
1834         return TEAM_DEFAULT_NUM_TX_QUEUES;
1835 }
1836
1837 static unsigned int team_get_num_rx_queues(void)
1838 {
1839         return TEAM_DEFAULT_NUM_RX_QUEUES;
1840 }
1841
1842 static struct rtnl_link_ops team_link_ops __read_mostly = {
1843         .kind                   = DRV_NAME,
1844         .priv_size              = sizeof(struct team),
1845         .setup                  = team_setup,
1846         .newlink                = team_newlink,
1847         .validate               = team_validate,
1848         .get_num_tx_queues      = team_get_num_tx_queues,
1849         .get_num_rx_queues      = team_get_num_rx_queues,
1850 };
1851
1852
1853 /***********************************
1854  * Generic netlink custom interface
1855  ***********************************/
1856
1857 static struct genl_family team_nl_family = {
1858         .id             = GENL_ID_GENERATE,
1859         .name           = TEAM_GENL_NAME,
1860         .version        = TEAM_GENL_VERSION,
1861         .maxattr        = TEAM_ATTR_MAX,
1862         .netnsok        = true,
1863 };
1864
1865 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
1866         [TEAM_ATTR_UNSPEC]                      = { .type = NLA_UNSPEC, },
1867         [TEAM_ATTR_TEAM_IFINDEX]                = { .type = NLA_U32 },
1868         [TEAM_ATTR_LIST_OPTION]                 = { .type = NLA_NESTED },
1869         [TEAM_ATTR_LIST_PORT]                   = { .type = NLA_NESTED },
1870 };
1871
1872 static const struct nla_policy
1873 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
1874         [TEAM_ATTR_OPTION_UNSPEC]               = { .type = NLA_UNSPEC, },
1875         [TEAM_ATTR_OPTION_NAME] = {
1876                 .type = NLA_STRING,
1877                 .len = TEAM_STRING_MAX_LEN,
1878         },
1879         [TEAM_ATTR_OPTION_CHANGED]              = { .type = NLA_FLAG },
1880         [TEAM_ATTR_OPTION_TYPE]                 = { .type = NLA_U8 },
1881         [TEAM_ATTR_OPTION_DATA]                 = { .type = NLA_BINARY },
1882 };
1883
1884 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
1885 {
1886         struct sk_buff *msg;
1887         void *hdr;
1888         int err;
1889
1890         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1891         if (!msg)
1892                 return -ENOMEM;
1893
1894         hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
1895                           &team_nl_family, 0, TEAM_CMD_NOOP);
1896         if (!hdr) {
1897                 err = -EMSGSIZE;
1898                 goto err_msg_put;
1899         }
1900
1901         genlmsg_end(msg, hdr);
1902
1903         return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
1904
1905 err_msg_put:
1906         nlmsg_free(msg);
1907
1908         return err;
1909 }
1910
1911 /*
1912  * Netlink cmd functions should be locked by following two functions.
1913  * Since dev gets held here, that ensures dev won't disappear in between.
1914  */
1915 static struct team *team_nl_team_get(struct genl_info *info)
1916 {
1917         struct net *net = genl_info_net(info);
1918         int ifindex;
1919         struct net_device *dev;
1920         struct team *team;
1921
1922         if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
1923                 return NULL;
1924
1925         ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
1926         dev = dev_get_by_index(net, ifindex);
1927         if (!dev || dev->netdev_ops != &team_netdev_ops) {
1928                 if (dev)
1929                         dev_put(dev);
1930                 return NULL;
1931         }
1932
1933         team = netdev_priv(dev);
1934         mutex_lock(&team->lock);
1935         return team;
1936 }
1937
1938 static void team_nl_team_put(struct team *team)
1939 {
1940         mutex_unlock(&team->lock);
1941         dev_put(team->dev);
1942 }
1943
1944 static int team_nl_send_generic(struct genl_info *info, struct team *team,
1945                                 int (*fill_func)(struct sk_buff *skb,
1946                                                  struct genl_info *info,
1947                                                  int flags, struct team *team))
1948 {
1949         struct sk_buff *skb;
1950         int err;
1951
1952         skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1953         if (!skb)
1954                 return -ENOMEM;
1955
1956         err = fill_func(skb, info, NLM_F_ACK, team);
1957         if (err < 0)
1958                 goto err_fill;
1959
1960         err = genlmsg_unicast(genl_info_net(info), skb, info->snd_portid);
1961         return err;
1962
1963 err_fill:
1964         nlmsg_free(skb);
1965         return err;
1966 }
1967
1968 typedef int team_nl_send_func_t(struct sk_buff *skb,
1969                                 struct team *team, u32 portid);
1970
1971 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
1972 {
1973         return genlmsg_unicast(dev_net(team->dev), skb, portid);
1974 }
1975
1976 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
1977                                        struct team_option_inst *opt_inst)
1978 {
1979         struct nlattr *option_item;
1980         struct team_option *option = opt_inst->option;
1981         struct team_option_inst_info *opt_inst_info = &opt_inst->info;
1982         struct team_gsetter_ctx ctx;
1983         int err;
1984
1985         ctx.info = opt_inst_info;
1986         err = team_option_get(team, opt_inst, &ctx);
1987         if (err)
1988                 return err;
1989
1990         option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
1991         if (!option_item)
1992                 return -EMSGSIZE;
1993
1994         if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
1995                 goto nest_cancel;
1996         if (opt_inst_info->port &&
1997             nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
1998                         opt_inst_info->port->dev->ifindex))
1999                 goto nest_cancel;
2000         if (opt_inst->option->array_size &&
2001             nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2002                         opt_inst_info->array_index))
2003                 goto nest_cancel;
2004
2005         switch (option->type) {
2006         case TEAM_OPTION_TYPE_U32:
2007                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2008                         goto nest_cancel;
2009                 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2010                         goto nest_cancel;
2011                 break;
2012         case TEAM_OPTION_TYPE_STRING:
2013                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2014                         goto nest_cancel;
2015                 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2016                                    ctx.data.str_val))
2017                         goto nest_cancel;
2018                 break;
2019         case TEAM_OPTION_TYPE_BINARY:
2020                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2021                         goto nest_cancel;
2022                 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2023                             ctx.data.bin_val.ptr))
2024                         goto nest_cancel;
2025                 break;
2026         case TEAM_OPTION_TYPE_BOOL:
2027                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2028                         goto nest_cancel;
2029                 if (ctx.data.bool_val &&
2030                     nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2031                         goto nest_cancel;
2032                 break;
2033         case TEAM_OPTION_TYPE_S32:
2034                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2035                         goto nest_cancel;
2036                 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2037                         goto nest_cancel;
2038                 break;
2039         default:
2040                 BUG();
2041         }
2042         if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2043                 goto nest_cancel;
2044         if (opt_inst->changed) {
2045                 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2046                         goto nest_cancel;
2047                 opt_inst->changed = false;
2048         }
2049         nla_nest_end(skb, option_item);
2050         return 0;
2051
2052 nest_cancel:
2053         nla_nest_cancel(skb, option_item);
2054         return -EMSGSIZE;
2055 }
2056
2057 static int __send_and_alloc_skb(struct sk_buff **pskb,
2058                                 struct team *team, u32 portid,
2059                                 team_nl_send_func_t *send_func)
2060 {
2061         int err;
2062
2063         if (*pskb) {
2064                 err = send_func(*pskb, team, portid);
2065                 if (err)
2066                         return err;
2067         }
2068         *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2069         if (!*pskb)
2070                 return -ENOMEM;
2071         return 0;
2072 }
2073
2074 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2075                                     int flags, team_nl_send_func_t *send_func,
2076                                     struct list_head *sel_opt_inst_list)
2077 {
2078         struct nlattr *option_list;
2079         struct nlmsghdr *nlh;
2080         void *hdr;
2081         struct team_option_inst *opt_inst;
2082         int err;
2083         struct sk_buff *skb = NULL;
2084         bool incomplete;
2085         int i;
2086
2087         opt_inst = list_first_entry(sel_opt_inst_list,
2088                                     struct team_option_inst, tmp_list);
2089
2090 start_again:
2091         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2092         if (err)
2093                 return err;
2094
2095         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2096                           TEAM_CMD_OPTIONS_GET);
2097         if (!hdr)
2098                 return -EMSGSIZE;
2099
2100         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2101                 goto nla_put_failure;
2102         option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2103         if (!option_list)
2104                 goto nla_put_failure;
2105
2106         i = 0;
2107         incomplete = false;
2108         list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2109                 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2110                 if (err) {
2111                         if (err == -EMSGSIZE) {
2112                                 if (!i)
2113                                         goto errout;
2114                                 incomplete = true;
2115                                 break;
2116                         }
2117                         goto errout;
2118                 }
2119                 i++;
2120         }
2121
2122         nla_nest_end(skb, option_list);
2123         genlmsg_end(skb, hdr);
2124         if (incomplete)
2125                 goto start_again;
2126
2127 send_done:
2128         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2129         if (!nlh) {
2130                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2131                 if (err)
2132                         goto errout;
2133                 goto send_done;
2134         }
2135
2136         return send_func(skb, team, portid);
2137
2138 nla_put_failure:
2139         err = -EMSGSIZE;
2140 errout:
2141         genlmsg_cancel(skb, hdr);
2142         nlmsg_free(skb);
2143         return err;
2144 }
2145
2146 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2147 {
2148         struct team *team;
2149         struct team_option_inst *opt_inst;
2150         int err;
2151         LIST_HEAD(sel_opt_inst_list);
2152
2153         team = team_nl_team_get(info);
2154         if (!team)
2155                 return -EINVAL;
2156
2157         list_for_each_entry(opt_inst, &team->option_inst_list, list)
2158                 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2159         err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2160                                        NLM_F_ACK, team_nl_send_unicast,
2161                                        &sel_opt_inst_list);
2162
2163         team_nl_team_put(team);
2164
2165         return err;
2166 }
2167
2168 static int team_nl_send_event_options_get(struct team *team,
2169                                           struct list_head *sel_opt_inst_list);
2170
2171 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2172 {
2173         struct team *team;
2174         int err = 0;
2175         int i;
2176         struct nlattr *nl_option;
2177         LIST_HEAD(opt_inst_list);
2178
2179         team = team_nl_team_get(info);
2180         if (!team)
2181                 return -EINVAL;
2182
2183         err = -EINVAL;
2184         if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2185                 err = -EINVAL;
2186                 goto team_put;
2187         }
2188
2189         nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2190                 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2191                 struct nlattr *attr;
2192                 struct nlattr *attr_data;
2193                 enum team_option_type opt_type;
2194                 int opt_port_ifindex = 0; /* != 0 for per-port options */
2195                 u32 opt_array_index = 0;
2196                 bool opt_is_array = false;
2197                 struct team_option_inst *opt_inst;
2198                 char *opt_name;
2199                 bool opt_found = false;
2200
2201                 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2202                         err = -EINVAL;
2203                         goto team_put;
2204                 }
2205                 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2206                                        nl_option, team_nl_option_policy);
2207                 if (err)
2208                         goto team_put;
2209                 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2210                     !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2211                         err = -EINVAL;
2212                         goto team_put;
2213                 }
2214                 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2215                 case NLA_U32:
2216                         opt_type = TEAM_OPTION_TYPE_U32;
2217                         break;
2218                 case NLA_STRING:
2219                         opt_type = TEAM_OPTION_TYPE_STRING;
2220                         break;
2221                 case NLA_BINARY:
2222                         opt_type = TEAM_OPTION_TYPE_BINARY;
2223                         break;
2224                 case NLA_FLAG:
2225                         opt_type = TEAM_OPTION_TYPE_BOOL;
2226                         break;
2227                 case NLA_S32:
2228                         opt_type = TEAM_OPTION_TYPE_S32;
2229                         break;
2230                 default:
2231                         goto team_put;
2232                 }
2233
2234                 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2235                 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2236                         err = -EINVAL;
2237                         goto team_put;
2238                 }
2239
2240                 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2241                 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2242                 if (attr)
2243                         opt_port_ifindex = nla_get_u32(attr);
2244
2245                 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2246                 if (attr) {
2247                         opt_is_array = true;
2248                         opt_array_index = nla_get_u32(attr);
2249                 }
2250
2251                 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2252                         struct team_option *option = opt_inst->option;
2253                         struct team_gsetter_ctx ctx;
2254                         struct team_option_inst_info *opt_inst_info;
2255                         int tmp_ifindex;
2256
2257                         opt_inst_info = &opt_inst->info;
2258                         tmp_ifindex = opt_inst_info->port ?
2259                                       opt_inst_info->port->dev->ifindex : 0;
2260                         if (option->type != opt_type ||
2261                             strcmp(option->name, opt_name) ||
2262                             tmp_ifindex != opt_port_ifindex ||
2263                             (option->array_size && !opt_is_array) ||
2264                             opt_inst_info->array_index != opt_array_index)
2265                                 continue;
2266                         opt_found = true;
2267                         ctx.info = opt_inst_info;
2268                         switch (opt_type) {
2269                         case TEAM_OPTION_TYPE_U32:
2270                                 ctx.data.u32_val = nla_get_u32(attr_data);
2271                                 break;
2272                         case TEAM_OPTION_TYPE_STRING:
2273                                 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2274                                         err = -EINVAL;
2275                                         goto team_put;
2276                                 }
2277                                 ctx.data.str_val = nla_data(attr_data);
2278                                 break;
2279                         case TEAM_OPTION_TYPE_BINARY:
2280                                 ctx.data.bin_val.len = nla_len(attr_data);
2281                                 ctx.data.bin_val.ptr = nla_data(attr_data);
2282                                 break;
2283                         case TEAM_OPTION_TYPE_BOOL:
2284                                 ctx.data.bool_val = attr_data ? true : false;
2285                                 break;
2286                         case TEAM_OPTION_TYPE_S32:
2287                                 ctx.data.s32_val = nla_get_s32(attr_data);
2288                                 break;
2289                         default:
2290                                 BUG();
2291                         }
2292                         err = team_option_set(team, opt_inst, &ctx);
2293                         if (err)
2294                                 goto team_put;
2295                         opt_inst->changed = true;
2296                         list_add(&opt_inst->tmp_list, &opt_inst_list);
2297                 }
2298                 if (!opt_found) {
2299                         err = -ENOENT;
2300                         goto team_put;
2301                 }
2302         }
2303
2304         err = team_nl_send_event_options_get(team, &opt_inst_list);
2305
2306 team_put:
2307         team_nl_team_put(team);
2308
2309         return err;
2310 }
2311
2312 static int team_nl_fill_port_list_get(struct sk_buff *skb,
2313                                       u32 portid, u32 seq, int flags,
2314                                       struct team *team,
2315                                       bool fillall)
2316 {
2317         struct nlattr *port_list;
2318         void *hdr;
2319         struct team_port *port;
2320
2321         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags,
2322                           TEAM_CMD_PORT_LIST_GET);
2323         if (!hdr)
2324                 return -EMSGSIZE;
2325
2326         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2327                 goto nla_put_failure;
2328         port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2329         if (!port_list)
2330                 goto nla_put_failure;
2331
2332         list_for_each_entry(port, &team->port_list, list) {
2333                 struct nlattr *port_item;
2334
2335                 /* Include only changed ports if fill all mode is not on */
2336                 if (!fillall && !port->changed)
2337                         continue;
2338                 port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2339                 if (!port_item)
2340                         goto nla_put_failure;
2341                 if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2342                         goto nla_put_failure;
2343                 if (port->changed) {
2344                         if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2345                                 goto nla_put_failure;
2346                         port->changed = false;
2347                 }
2348                 if ((port->removed &&
2349                      nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2350                     (port->state.linkup &&
2351                      nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2352                     nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2353                     nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2354                         goto nla_put_failure;
2355                 nla_nest_end(skb, port_item);
2356         }
2357
2358         nla_nest_end(skb, port_list);
2359         return genlmsg_end(skb, hdr);
2360
2361 nla_put_failure:
2362         genlmsg_cancel(skb, hdr);
2363         return -EMSGSIZE;
2364 }
2365
2366 static int team_nl_fill_port_list_get_all(struct sk_buff *skb,
2367                                           struct genl_info *info, int flags,
2368                                           struct team *team)
2369 {
2370         return team_nl_fill_port_list_get(skb, info->snd_portid,
2371                                           info->snd_seq, NLM_F_ACK,
2372                                           team, true);
2373 }
2374
2375 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2376                                      struct genl_info *info)
2377 {
2378         struct team *team;
2379         int err;
2380
2381         team = team_nl_team_get(info);
2382         if (!team)
2383                 return -EINVAL;
2384
2385         err = team_nl_send_generic(info, team, team_nl_fill_port_list_get_all);
2386
2387         team_nl_team_put(team);
2388
2389         return err;
2390 }
2391
2392 static struct genl_ops team_nl_ops[] = {
2393         {
2394                 .cmd = TEAM_CMD_NOOP,
2395                 .doit = team_nl_cmd_noop,
2396                 .policy = team_nl_policy,
2397         },
2398         {
2399                 .cmd = TEAM_CMD_OPTIONS_SET,
2400                 .doit = team_nl_cmd_options_set,
2401                 .policy = team_nl_policy,
2402                 .flags = GENL_ADMIN_PERM,
2403         },
2404         {
2405                 .cmd = TEAM_CMD_OPTIONS_GET,
2406                 .doit = team_nl_cmd_options_get,
2407                 .policy = team_nl_policy,
2408                 .flags = GENL_ADMIN_PERM,
2409         },
2410         {
2411                 .cmd = TEAM_CMD_PORT_LIST_GET,
2412                 .doit = team_nl_cmd_port_list_get,
2413                 .policy = team_nl_policy,
2414                 .flags = GENL_ADMIN_PERM,
2415         },
2416 };
2417
2418 static struct genl_multicast_group team_change_event_mcgrp = {
2419         .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME,
2420 };
2421
2422 static int team_nl_send_multicast(struct sk_buff *skb,
2423                                   struct team *team, u32 portid)
2424 {
2425         return genlmsg_multicast_netns(dev_net(team->dev), skb, 0,
2426                                        team_change_event_mcgrp.id, GFP_KERNEL);
2427 }
2428
2429 static int team_nl_send_event_options_get(struct team *team,
2430                                           struct list_head *sel_opt_inst_list)
2431 {
2432         return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2433                                         sel_opt_inst_list);
2434 }
2435
2436 static int team_nl_send_event_port_list_get(struct team *team)
2437 {
2438         struct sk_buff *skb;
2439         int err;
2440         struct net *net = dev_net(team->dev);
2441
2442         skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2443         if (!skb)
2444                 return -ENOMEM;
2445
2446         err = team_nl_fill_port_list_get(skb, 0, 0, 0, team, false);
2447         if (err < 0)
2448                 goto err_fill;
2449
2450         err = genlmsg_multicast_netns(net, skb, 0, team_change_event_mcgrp.id,
2451                                       GFP_KERNEL);
2452         return err;
2453
2454 err_fill:
2455         nlmsg_free(skb);
2456         return err;
2457 }
2458
2459 static int team_nl_init(void)
2460 {
2461         int err;
2462
2463         err = genl_register_family_with_ops(&team_nl_family, team_nl_ops,
2464                                             ARRAY_SIZE(team_nl_ops));
2465         if (err)
2466                 return err;
2467
2468         err = genl_register_mc_group(&team_nl_family, &team_change_event_mcgrp);
2469         if (err)
2470                 goto err_change_event_grp_reg;
2471
2472         return 0;
2473
2474 err_change_event_grp_reg:
2475         genl_unregister_family(&team_nl_family);
2476
2477         return err;
2478 }
2479
2480 static void team_nl_fini(void)
2481 {
2482         genl_unregister_family(&team_nl_family);
2483 }
2484
2485
2486 /******************
2487  * Change checkers
2488  ******************/
2489
2490 static void __team_options_change_check(struct team *team)
2491 {
2492         int err;
2493         struct team_option_inst *opt_inst;
2494         LIST_HEAD(sel_opt_inst_list);
2495
2496         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2497                 if (opt_inst->changed)
2498                         list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2499         }
2500         err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2501         if (err && err != -ESRCH)
2502                 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2503                             err);
2504 }
2505
2506 /* rtnl lock is held */
2507
2508 static void __team_port_change_send(struct team_port *port, bool linkup)
2509 {
2510         int err;
2511
2512         port->changed = true;
2513         port->state.linkup = linkup;
2514         team_refresh_port_linkup(port);
2515         if (linkup) {
2516                 struct ethtool_cmd ecmd;
2517
2518                 err = __ethtool_get_settings(port->dev, &ecmd);
2519                 if (!err) {
2520                         port->state.speed = ethtool_cmd_speed(&ecmd);
2521                         port->state.duplex = ecmd.duplex;
2522                         goto send_event;
2523                 }
2524         }
2525         port->state.speed = 0;
2526         port->state.duplex = 0;
2527
2528 send_event:
2529         err = team_nl_send_event_port_list_get(port->team);
2530         if (err && err != -ESRCH)
2531                 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2532                             port->dev->name, err);
2533
2534 }
2535
2536 static void __team_port_change_check(struct team_port *port, bool linkup)
2537 {
2538         if (port->state.linkup != linkup)
2539                 __team_port_change_send(port, linkup);
2540 }
2541
2542 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2543 {
2544         __team_port_change_send(port, linkup);
2545 }
2546
2547 static void __team_port_change_port_removed(struct team_port *port)
2548 {
2549         port->removed = true;
2550         __team_port_change_send(port, false);
2551 }
2552
2553 static void team_port_change_check(struct team_port *port, bool linkup)
2554 {
2555         struct team *team = port->team;
2556
2557         mutex_lock(&team->lock);
2558         __team_port_change_check(port, linkup);
2559         mutex_unlock(&team->lock);
2560 }
2561
2562
2563 /************************************
2564  * Net device notifier event handler
2565  ************************************/
2566
2567 static int team_device_event(struct notifier_block *unused,
2568                              unsigned long event, void *ptr)
2569 {
2570         struct net_device *dev = (struct net_device *) ptr;
2571         struct team_port *port;
2572
2573         port = team_port_get_rtnl(dev);
2574         if (!port)
2575                 return NOTIFY_DONE;
2576
2577         switch (event) {
2578         case NETDEV_UP:
2579                 if (netif_carrier_ok(dev))
2580                         team_port_change_check(port, true);
2581         case NETDEV_DOWN:
2582                 team_port_change_check(port, false);
2583         case NETDEV_CHANGE:
2584                 if (netif_running(port->dev))
2585                         team_port_change_check(port,
2586                                                !!netif_carrier_ok(port->dev));
2587                 break;
2588         case NETDEV_UNREGISTER:
2589                 team_del_slave(port->team->dev, dev);
2590                 break;
2591         case NETDEV_FEAT_CHANGE:
2592                 team_compute_features(port->team);
2593                 break;
2594         case NETDEV_CHANGEMTU:
2595                 /* Forbid to change mtu of underlaying device */
2596                 return NOTIFY_BAD;
2597         case NETDEV_PRE_TYPE_CHANGE:
2598                 /* Forbid to change type of underlaying device */
2599                 return NOTIFY_BAD;
2600         }
2601         return NOTIFY_DONE;
2602 }
2603
2604 static struct notifier_block team_notifier_block __read_mostly = {
2605         .notifier_call = team_device_event,
2606 };
2607
2608
2609 /***********************
2610  * Module init and exit
2611  ***********************/
2612
2613 static int __init team_module_init(void)
2614 {
2615         int err;
2616
2617         register_netdevice_notifier(&team_notifier_block);
2618
2619         err = rtnl_link_register(&team_link_ops);
2620         if (err)
2621                 goto err_rtnl_reg;
2622
2623         err = team_nl_init();
2624         if (err)
2625                 goto err_nl_init;
2626
2627         return 0;
2628
2629 err_nl_init:
2630         rtnl_link_unregister(&team_link_ops);
2631
2632 err_rtnl_reg:
2633         unregister_netdevice_notifier(&team_notifier_block);
2634
2635         return err;
2636 }
2637
2638 static void __exit team_module_exit(void)
2639 {
2640         team_nl_fini();
2641         rtnl_link_unregister(&team_link_ops);
2642         unregister_netdevice_notifier(&team_notifier_block);
2643 }
2644
2645 module_init(team_module_init);
2646 module_exit(team_module_exit);
2647
2648 MODULE_LICENSE("GPL v2");
2649 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
2650 MODULE_DESCRIPTION("Ethernet team device driver");
2651 MODULE_ALIAS_RTNL_LINK(DRV_NAME);