Pileus Git - ~andy/linux/blob - drivers/net/team/team.c

   1 /*
   2  * drivers/net/team/team.c - Network team device driver
   3  * Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/types.h>
  13 #include <linux/module.h>
  14 #include <linux/init.h>
  15 #include <linux/slab.h>
  16 #include <linux/rcupdate.h>
  17 #include <linux/errno.h>
  18 #include <linux/ctype.h>
  19 #include <linux/notifier.h>
  20 #include <linux/netdevice.h>
  21 #include <linux/netpoll.h>
  22 #include <linux/if_vlan.h>
  23 #include <linux/if_arp.h>
  24 #include <linux/socket.h>
  25 #include <linux/etherdevice.h>
  26 #include <linux/rtnetlink.h>
  27 #include <net/rtnetlink.h>
  28 #include <net/genetlink.h>
  29 #include <net/netlink.h>
  30 #include <net/sch_generic.h>
  31 #include <generated/utsrelease.h>
  32 #include <linux/if_team.h>
  33
  34 #define DRV_NAME "team"
  35
  36
  37 /**********
  38  * Helpers
  39  **********/
  40
  41 #define team_port_exists(dev) (dev->priv_flags & IFF_TEAM_PORT)
  42
  43 static struct team_port *team_port_get_rcu(const struct net_device *dev)
  44 {
  45         struct team_port *port = rcu_dereference(dev->rx_handler_data);
  46
  47         return team_port_exists(dev) ? port : NULL;
  48 }
  49
  50 static struct team_port *team_port_get_rtnl(const struct net_device *dev)
  51 {
  52         struct team_port *port = rtnl_dereference(dev->rx_handler_data);
  53
  54         return team_port_exists(dev) ? port : NULL;
  55 }
  56
  57 /*
  58  * Since the ability to change device address for open port device is tested in
  59  * team_port_add, this function can be called without control of return value
  60  */
  61 static int __set_port_dev_addr(struct net_device *port_dev,
  62                                const unsigned char *dev_addr)
  63 {
  64         struct sockaddr addr;
  65
  66         memcpy(addr.sa_data, dev_addr, port_dev->addr_len);
  67         addr.sa_family = port_dev->type;
  68         return dev_set_mac_address(port_dev, &addr);
  69 }
  70
  71 static int team_port_set_orig_dev_addr(struct team_port *port)
  72 {
  73         return __set_port_dev_addr(port->dev, port->orig.dev_addr);
  74 }
  75
  76 int team_port_set_team_dev_addr(struct team_port *port)
  77 {
  78         return __set_port_dev_addr(port->dev, port->team->dev->dev_addr);
  79 }
  80 EXPORT_SYMBOL(team_port_set_team_dev_addr);
  81
  82 static void team_refresh_port_linkup(struct team_port *port)
  83 {
  84         port->linkup = port->user.linkup_enabled ? port->user.linkup :
  85                                                    port->state.linkup;
  86 }
  87
  88
  89 /*******************
  90  * Options handling
  91  *******************/
  92
  93 struct team_option_inst { /* One for each option instance */
  94         struct list_head list;
  95         struct list_head tmp_list;
  96         struct team_option *option;
  97         struct team_option_inst_info info;
  98         bool changed;
  99         bool removed;
 100 };
 101
 102 static struct team_option *__team_find_option(struct team *team,
 103                                               const char *opt_name)
 104 {
 105         struct team_option *option;
 106
 107         list_for_each_entry(option, &team->option_list, list) {
 108                 if (strcmp(option->name, opt_name) == 0)
 109                         return option;
 110         }
 111         return NULL;
 112 }
 113
 114 static void __team_option_inst_del(struct team_option_inst *opt_inst)
 115 {
 116         list_del(&opt_inst->list);
 117         kfree(opt_inst);
 118 }
 119
 120 static void __team_option_inst_del_option(struct team *team,
 121                                           struct team_option *option)
 122 {
 123         struct team_option_inst *opt_inst, *tmp;
 124
 125         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 126                 if (opt_inst->option == option)
 127                         __team_option_inst_del(opt_inst);
 128         }
 129 }
 130
 131 static int __team_option_inst_add(struct team *team, struct team_option *option,
 132                                   struct team_port *port)
 133 {
 134         struct team_option_inst *opt_inst;
 135         unsigned int array_size;
 136         unsigned int i;
 137         int err;
 138
 139         array_size = option->array_size;
 140         if (!array_size)
 141                 array_size = 1; /* No array but still need one instance */
 142
 143         for (i = 0; i < array_size; i++) {
 144                 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL);
 145                 if (!opt_inst)
 146                         return -ENOMEM;
 147                 opt_inst->option = option;
 148                 opt_inst->info.port = port;
 149                 opt_inst->info.array_index = i;
 150                 opt_inst->changed = true;
 151                 opt_inst->removed = false;
 152                 list_add_tail(&opt_inst->list, &team->option_inst_list);
 153                 if (option->init) {
 154                         err = option->init(team, &opt_inst->info);
 155                         if (err)
 156                                 return err;
 157                 }
 158
 159         }
 160         return 0;
 161 }
 162
 163 static int __team_option_inst_add_option(struct team *team,
 164                                          struct team_option *option)
 165 {
 166         struct team_port *port;
 167         int err;
 168
 169         if (!option->per_port) {
 170                 err = __team_option_inst_add(team, option, NULL);
 171                 if (err)
 172                         goto inst_del_option;
 173         }
 174
 175         list_for_each_entry(port, &team->port_list, list) {
 176                 err = __team_option_inst_add(team, option, port);
 177                 if (err)
 178                         goto inst_del_option;
 179         }
 180         return 0;
 181
 182 inst_del_option:
 183         __team_option_inst_del_option(team, option);
 184         return err;
 185 }
 186
 187 static void __team_option_inst_mark_removed_option(struct team *team,
 188                                                    struct team_option *option)
 189 {
 190         struct team_option_inst *opt_inst;
 191
 192         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 193                 if (opt_inst->option == option) {
 194                         opt_inst->changed = true;
 195                         opt_inst->removed = true;
 196                 }
 197         }
 198 }
 199
 200 static void __team_option_inst_del_port(struct team *team,
 201                                         struct team_port *port)
 202 {
 203         struct team_option_inst *opt_inst, *tmp;
 204
 205         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 206                 if (opt_inst->option->per_port &&
 207                     opt_inst->info.port == port)
 208                         __team_option_inst_del(opt_inst);
 209         }
 210 }
 211
 212 static int __team_option_inst_add_port(struct team *team,
 213                                        struct team_port *port)
 214 {
 215         struct team_option *option;
 216         int err;
 217
 218         list_for_each_entry(option, &team->option_list, list) {
 219                 if (!option->per_port)
 220                         continue;
 221                 err = __team_option_inst_add(team, option, port);
 222                 if (err)
 223                         goto inst_del_port;
 224         }
 225         return 0;
 226
 227 inst_del_port:
 228         __team_option_inst_del_port(team, port);
 229         return err;
 230 }
 231
 232 static void __team_option_inst_mark_removed_port(struct team *team,
 233                                                  struct team_port *port)
 234 {
 235         struct team_option_inst *opt_inst;
 236
 237         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 238                 if (opt_inst->info.port == port) {
 239                         opt_inst->changed = true;
 240                         opt_inst->removed = true;
 241                 }
 242         }
 243 }
 244
 245 static int __team_options_register(struct team *team,
 246                                    const struct team_option *option,
 247                                    size_t option_count)
 248 {
 249         int i;
 250         struct team_option **dst_opts;
 251         int err;
 252
 253         dst_opts = kzalloc(sizeof(struct team_option *) * option_count,
 254                            GFP_KERNEL);
 255         if (!dst_opts)
 256                 return -ENOMEM;
 257         for (i = 0; i < option_count; i++, option++) {
 258                 if (__team_find_option(team, option->name)) {
 259                         err = -EEXIST;
 260                         goto alloc_rollback;
 261                 }
 262                 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
 263                 if (!dst_opts[i]) {
 264                         err = -ENOMEM;
 265                         goto alloc_rollback;
 266                 }
 267         }
 268
 269         for (i = 0; i < option_count; i++) {
 270                 err = __team_option_inst_add_option(team, dst_opts[i]);
 271                 if (err)
 272                         goto inst_rollback;
 273                 list_add_tail(&dst_opts[i]->list, &team->option_list);
 274         }
 275
 276         kfree(dst_opts);
 277         return 0;
 278
 279 inst_rollback:
 280         for (i--; i >= 0; i--)
 281                 __team_option_inst_del_option(team, dst_opts[i]);
 282
 283         i = option_count - 1;
 284 alloc_rollback:
 285         for (i--; i >= 0; i--)
 286                 kfree(dst_opts[i]);
 287
 288         kfree(dst_opts);
 289         return err;
 290 }
 291
 292 static void __team_options_mark_removed(struct team *team,
 293                                         const struct team_option *option,
 294                                         size_t option_count)
 295 {
 296         int i;
 297
 298         for (i = 0; i < option_count; i++, option++) {
 299                 struct team_option *del_opt;
 300
 301                 del_opt = __team_find_option(team, option->name);
 302                 if (del_opt)
 303                         __team_option_inst_mark_removed_option(team, del_opt);
 304         }
 305 }
 306
 307 static void __team_options_unregister(struct team *team,
 308                                       const struct team_option *option,
 309                                       size_t option_count)
 310 {
 311         int i;
 312
 313         for (i = 0; i < option_count; i++, option++) {
 314                 struct team_option *del_opt;
 315
 316                 del_opt = __team_find_option(team, option->name);
 317                 if (del_opt) {
 318                         __team_option_inst_del_option(team, del_opt);
 319                         list_del(&del_opt->list);
 320                         kfree(del_opt);
 321                 }
 322         }
 323 }
 324
 325 static void __team_options_change_check(struct team *team);
 326
 327 int team_options_register(struct team *team,
 328                           const struct team_option *option,
 329                           size_t option_count)
 330 {
 331         int err;
 332
 333         err = __team_options_register(team, option, option_count);
 334         if (err)
 335                 return err;
 336         __team_options_change_check(team);
 337         return 0;
 338 }
 339 EXPORT_SYMBOL(team_options_register);
 340
 341 void team_options_unregister(struct team *team,
 342                              const struct team_option *option,
 343                              size_t option_count)
 344 {
 345         __team_options_mark_removed(team, option, option_count);
 346         __team_options_change_check(team);
 347         __team_options_unregister(team, option, option_count);
 348 }
 349 EXPORT_SYMBOL(team_options_unregister);
 350
 351 static int team_option_get(struct team *team,
 352                            struct team_option_inst *opt_inst,
 353                            struct team_gsetter_ctx *ctx)
 354 {
 355         if (!opt_inst->option->getter)
 356                 return -EOPNOTSUPP;
 357         return opt_inst->option->getter(team, ctx);
 358 }
 359
 360 static int team_option_set(struct team *team,
 361                            struct team_option_inst *opt_inst,
 362                            struct team_gsetter_ctx *ctx)
 363 {
 364         if (!opt_inst->option->setter)
 365                 return -EOPNOTSUPP;
 366         return opt_inst->option->setter(team, ctx);
 367 }
 368
 369 void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info)
 370 {
 371         struct team_option_inst *opt_inst;
 372
 373         opt_inst = container_of(opt_inst_info, struct team_option_inst, info);
 374         opt_inst->changed = true;
 375 }
 376 EXPORT_SYMBOL(team_option_inst_set_change);
 377
 378 void team_options_change_check(struct team *team)
 379 {
 380         __team_options_change_check(team);
 381 }
 382 EXPORT_SYMBOL(team_options_change_check);
 383
 384
 385 /****************
 386  * Mode handling
 387  ****************/
 388
 389 static LIST_HEAD(mode_list);
 390 static DEFINE_SPINLOCK(mode_list_lock);
 391
 392 struct team_mode_item {
 393         struct list_head list;
 394         const struct team_mode *mode;
 395 };
 396
 397 static struct team_mode_item *__find_mode(const char *kind)
 398 {
 399         struct team_mode_item *mitem;
 400
 401         list_for_each_entry(mitem, &mode_list, list) {
 402                 if (strcmp(mitem->mode->kind, kind) == 0)
 403                         return mitem;
 404         }
 405         return NULL;
 406 }
 407
 408 static bool is_good_mode_name(const char *name)
 409 {
 410         while (*name != '\0') {
 411                 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
 412                         return false;
 413                 name++;
 414         }
 415         return true;
 416 }
 417
 418 int team_mode_register(const struct team_mode *mode)
 419 {
 420         int err = 0;
 421         struct team_mode_item *mitem;
 422
 423         if (!is_good_mode_name(mode->kind) ||
 424             mode->priv_size > TEAM_MODE_PRIV_SIZE)
 425                 return -EINVAL;
 426
 427         mitem = kmalloc(sizeof(*mitem), GFP_KERNEL);
 428         if (!mitem)
 429                 return -ENOMEM;
 430
 431         spin_lock(&mode_list_lock);
 432         if (__find_mode(mode->kind)) {
 433                 err = -EEXIST;
 434                 kfree(mitem);
 435                 goto unlock;
 436         }
 437         mitem->mode = mode;
 438         list_add_tail(&mitem->list, &mode_list);
 439 unlock:
 440         spin_unlock(&mode_list_lock);
 441         return err;
 442 }
 443 EXPORT_SYMBOL(team_mode_register);
 444
 445 void team_mode_unregister(const struct team_mode *mode)
 446 {
 447         struct team_mode_item *mitem;
 448
 449         spin_lock(&mode_list_lock);
 450         mitem = __find_mode(mode->kind);
 451         if (mitem) {
 452                 list_del_init(&mitem->list);
 453                 kfree(mitem);
 454         }
 455         spin_unlock(&mode_list_lock);
 456 }
 457 EXPORT_SYMBOL(team_mode_unregister);
 458
 459 static const struct team_mode *team_mode_get(const char *kind)
 460 {
 461         struct team_mode_item *mitem;
 462         const struct team_mode *mode = NULL;
 463
 464         spin_lock(&mode_list_lock);
 465         mitem = __find_mode(kind);
 466         if (!mitem) {
 467                 spin_unlock(&mode_list_lock);
 468                 request_module("team-mode-%s", kind);
 469                 spin_lock(&mode_list_lock);
 470                 mitem = __find_mode(kind);
 471         }
 472         if (mitem) {
 473                 mode = mitem->mode;
 474                 if (!try_module_get(mode->owner))
 475                         mode = NULL;
 476         }
 477
 478         spin_unlock(&mode_list_lock);
 479         return mode;
 480 }
 481
 482 static void team_mode_put(const struct team_mode *mode)
 483 {
 484         module_put(mode->owner);
 485 }
 486
 487 static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
 488 {
 489         dev_kfree_skb_any(skb);
 490         return false;
 491 }
 492
 493 rx_handler_result_t team_dummy_receive(struct team *team,
 494                                        struct team_port *port,
 495                                        struct sk_buff *skb)
 496 {
 497         return RX_HANDLER_ANOTHER;
 498 }
 499
 500 static const struct team_mode __team_no_mode = {
 501         .kind           = "*NOMODE*",
 502 };
 503
 504 static bool team_is_mode_set(struct team *team)
 505 {
 506         return team->mode != &__team_no_mode;
 507 }
 508
 509 static void team_set_no_mode(struct team *team)
 510 {
 511         team->user_carrier_enabled = false;
 512         team->mode = &__team_no_mode;
 513 }
 514
 515 static void __team_adjust_ops(struct team *team, int en_port_count)
 516 {
 517         /*
 518          * To avoid checks in rx/tx skb paths, ensure here that non-null and
 519          * correct ops are always set.
 520          */
 521
 522         if (!en_port_count || !team_is_mode_set(team) ||
 523             !team->mode->ops->transmit)
 524                 team->ops.transmit = team_dummy_transmit;
 525         else
 526                 team->ops.transmit = team->mode->ops->transmit;
 527
 528         if (!en_port_count || !team_is_mode_set(team) ||
 529             !team->mode->ops->receive)
 530                 team->ops.receive = team_dummy_receive;
 531         else
 532                 team->ops.receive = team->mode->ops->receive;
 533 }
 534
 535 static void team_adjust_ops(struct team *team)
 536 {
 537         __team_adjust_ops(team, team->en_port_count);
 538 }
 539
 540 /*
 541  * We can benefit from the fact that it's ensured no port is present
 542  * at the time of mode change. Therefore no packets are in fly so there's no
 543  * need to set mode operations in any special way.
 544  */
 545 static int __team_change_mode(struct team *team,
 546                               const struct team_mode *new_mode)
 547 {
 548         /* Check if mode was previously set and do cleanup if so */
 549         if (team_is_mode_set(team)) {
 550                 void (*exit_op)(struct team *team) = team->ops.exit;
 551
 552                 /* Clear ops area so no callback is called any longer */
 553                 memset(&team->ops, 0, sizeof(struct team_mode_ops));
 554                 team_adjust_ops(team);
 555
 556                 if (exit_op)
 557                         exit_op(team);
 558                 team_mode_put(team->mode);
 559                 team_set_no_mode(team);
 560                 /* zero private data area */
 561                 memset(&team->mode_priv, 0,
 562                        sizeof(struct team) - offsetof(struct team, mode_priv));
 563         }
 564
 565         if (!new_mode)
 566                 return 0;
 567
 568         if (new_mode->ops->init) {
 569                 int err;
 570
 571                 err = new_mode->ops->init(team);
 572                 if (err)
 573                         return err;
 574         }
 575
 576         team->mode = new_mode;
 577         memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
 578         team_adjust_ops(team);
 579
 580         return 0;
 581 }
 582
 583 static int team_change_mode(struct team *team, const char *kind)
 584 {
 585         const struct team_mode *new_mode;
 586         struct net_device *dev = team->dev;
 587         int err;
 588
 589         if (!list_empty(&team->port_list)) {
 590                 netdev_err(dev, "No ports can be present during mode change\n");
 591                 return -EBUSY;
 592         }
 593
 594         if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) {
 595                 netdev_err(dev, "Unable to change to the same mode the team is in\n");
 596                 return -EINVAL;
 597         }
 598
 599         new_mode = team_mode_get(kind);
 600         if (!new_mode) {
 601                 netdev_err(dev, "Mode \"%s\" not found\n", kind);
 602                 return -EINVAL;
 603         }
 604
 605         err = __team_change_mode(team, new_mode);
 606         if (err) {
 607                 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
 608                 team_mode_put(new_mode);
 609                 return err;
 610         }
 611
 612         netdev_info(dev, "Mode changed to \"%s\"\n", kind);
 613         return 0;
 614 }
 615
 616
 617 /************************
 618  * Rx path frame handler
 619  ************************/
 620
 621 /* note: already called with rcu_read_lock */
 622 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
 623 {
 624         struct sk_buff *skb = *pskb;
 625         struct team_port *port;
 626         struct team *team;
 627         rx_handler_result_t res;
 628
 629         skb = skb_share_check(skb, GFP_ATOMIC);
 630         if (!skb)
 631                 return RX_HANDLER_CONSUMED;
 632
 633         *pskb = skb;
 634
 635         port = team_port_get_rcu(skb->dev);
 636         team = port->team;
 637         if (!team_port_enabled(port)) {
 638                 /* allow exact match delivery for disabled ports */
 639                 res = RX_HANDLER_EXACT;
 640         } else {
 641                 res = team->ops.receive(team, port, skb);
 642         }
 643         if (res == RX_HANDLER_ANOTHER) {
 644                 struct team_pcpu_stats *pcpu_stats;
 645
 646                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
 647                 u64_stats_update_begin(&pcpu_stats->syncp);
 648                 pcpu_stats->rx_packets++;
 649                 pcpu_stats->rx_bytes += skb->len;
 650                 if (skb->pkt_type == PACKET_MULTICAST)
 651                         pcpu_stats->rx_multicast++;
 652                 u64_stats_update_end(&pcpu_stats->syncp);
 653
 654                 skb->dev = team->dev;
 655         } else {
 656                 this_cpu_inc(team->pcpu_stats->rx_dropped);
 657         }
 658
 659         return res;
 660 }
 661
 662
 663 /*************************************
 664  * Multiqueue Tx port select override
 665  *************************************/
 666
 667 static int team_queue_override_init(struct team *team)
 668 {
 669         struct list_head *listarr;
 670         unsigned int queue_cnt = team->dev->num_tx_queues - 1;
 671         unsigned int i;
 672
 673         if (!queue_cnt)
 674                 return 0;
 675         listarr = kmalloc(sizeof(struct list_head) * queue_cnt, GFP_KERNEL);
 676         if (!listarr)
 677                 return -ENOMEM;
 678         team->qom_lists = listarr;
 679         for (i = 0; i < queue_cnt; i++)
 680                 INIT_LIST_HEAD(listarr++);
 681         return 0;
 682 }
 683
 684 static void team_queue_override_fini(struct team *team)
 685 {
 686         kfree(team->qom_lists);
 687 }
 688
 689 static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
 690 {
 691         return &team->qom_lists[queue_id - 1];
 692 }
 693
 694 /*
 695  * note: already called with rcu_read_lock
 696  */
 697 static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
 698 {
 699         struct list_head *qom_list;
 700         struct team_port *port;
 701
 702         if (!team->queue_override_enabled || !skb->queue_mapping)
 703                 return false;
 704         qom_list = __team_get_qom_list(team, skb->queue_mapping);
 705         list_for_each_entry_rcu(port, qom_list, qom_list) {
 706                 if (!team_dev_queue_xmit(team, port, skb))
 707                         return true;
 708         }
 709         return false;
 710 }
 711
 712 static void __team_queue_override_port_del(struct team *team,
 713                                            struct team_port *port)
 714 {
 715         list_del_rcu(&port->qom_list);
 716         synchronize_rcu();
 717         INIT_LIST_HEAD(&port->qom_list);
 718 }
 719
 720 static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
 721                                                       struct team_port *cur)
 722 {
 723         if (port->priority < cur->priority)
 724                 return true;
 725         if (port->priority > cur->priority)
 726                 return false;
 727         if (port->index < cur->index)
 728                 return true;
 729         return false;
 730 }
 731
 732 static void __team_queue_override_port_add(struct team *team,
 733                                            struct team_port *port)
 734 {
 735         struct team_port *cur;
 736         struct list_head *qom_list;
 737         struct list_head *node;
 738
 739         if (!port->queue_id || !team_port_enabled(port))
 740                 return;
 741
 742         qom_list = __team_get_qom_list(team, port->queue_id);
 743         node = qom_list;
 744         list_for_each_entry(cur, qom_list, qom_list) {
 745                 if (team_queue_override_port_has_gt_prio_than(port, cur))
 746                         break;
 747                 node = &cur->qom_list;
 748         }
 749         list_add_tail_rcu(&port->qom_list, node);
 750 }
 751
 752 static void __team_queue_override_enabled_check(struct team *team)
 753 {
 754         struct team_port *port;
 755         bool enabled = false;
 756
 757         list_for_each_entry(port, &team->port_list, list) {
 758                 if (!list_empty(&port->qom_list)) {
 759                         enabled = true;
 760                         break;
 761                 }
 762         }
 763         if (enabled == team->queue_override_enabled)
 764                 return;
 765         netdev_dbg(team->dev, "%s queue override\n",
 766                    enabled ? "Enabling" : "Disabling");
 767         team->queue_override_enabled = enabled;
 768 }
 769
 770 static void team_queue_override_port_refresh(struct team *team,
 771                                              struct team_port *port)
 772 {
 773         __team_queue_override_port_del(team, port);
 774         __team_queue_override_port_add(team, port);
 775         __team_queue_override_enabled_check(team);
 776 }
 777
 778
 779 /****************
 780  * Port handling
 781  ****************/
 782
 783 static bool team_port_find(const struct team *team,
 784                            const struct team_port *port)
 785 {
 786         struct team_port *cur;
 787
 788         list_for_each_entry(cur, &team->port_list, list)
 789                 if (cur == port)
 790                         return true;
 791         return false;
 792 }
 793
 794 /*
 795  * Enable/disable port by adding to enabled port hashlist and setting
 796  * port->index (Might be racy so reader could see incorrect ifindex when
 797  * processing a flying packet, but that is not a problem). Write guarded
 798  * by team->lock.
 799  */
 800 static void team_port_enable(struct team *team,
 801                              struct team_port *port)
 802 {
 803         if (team_port_enabled(port))
 804                 return;
 805         port->index = team->en_port_count++;
 806         hlist_add_head_rcu(&port->hlist,
 807                            team_port_index_hash(team, port->index));
 808         team_adjust_ops(team);
 809         team_queue_override_port_refresh(team, port);
 810         if (team->ops.port_enabled)
 811                 team->ops.port_enabled(team, port);
 812 }
 813
 814 static void __reconstruct_port_hlist(struct team *team, int rm_index)
 815 {
 816         int i;
 817         struct team_port *port;
 818
 819         for (i = rm_index + 1; i < team->en_port_count; i++) {
 820                 port = team_get_port_by_index(team, i);
 821                 hlist_del_rcu(&port->hlist);
 822                 port->index--;
 823                 hlist_add_head_rcu(&port->hlist,
 824                                    team_port_index_hash(team, port->index));
 825         }
 826 }
 827
 828 static void team_port_disable(struct team *team,
 829                               struct team_port *port)
 830 {
 831         if (!team_port_enabled(port))
 832                 return;
 833         if (team->ops.port_disabled)
 834                 team->ops.port_disabled(team, port);
 835         hlist_del_rcu(&port->hlist);
 836         __reconstruct_port_hlist(team, port->index);
 837         port->index = -1;
 838         team_queue_override_port_refresh(team, port);
 839         __team_adjust_ops(team, team->en_port_count - 1);
 840         /*
 841          * Wait until readers see adjusted ops. This ensures that
 842          * readers never see team->en_port_count == 0
 843          */
 844         synchronize_rcu();
 845         team->en_port_count--;
 846 }
 847
 848 #define TEAM_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \
 849                             NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
 850                             NETIF_F_HIGHDMA | NETIF_F_LRO)
 851
 852 static void __team_compute_features(struct team *team)
 853 {
 854         struct team_port *port;
 855         u32 vlan_features = TEAM_VLAN_FEATURES;
 856         unsigned short max_hard_header_len = ETH_HLEN;
 857         unsigned int flags, dst_release_flag = IFF_XMIT_DST_RELEASE;
 858
 859         list_for_each_entry(port, &team->port_list, list) {
 860                 vlan_features = netdev_increment_features(vlan_features,
 861                                         port->dev->vlan_features,
 862                                         TEAM_VLAN_FEATURES);
 863
 864                 dst_release_flag &= port->dev->priv_flags;
 865                 if (port->dev->hard_header_len > max_hard_header_len)
 866                         max_hard_header_len = port->dev->hard_header_len;
 867         }
 868
 869         team->dev->vlan_features = vlan_features;
 870         team->dev->hard_header_len = max_hard_header_len;
 871
 872         flags = team->dev->priv_flags & ~IFF_XMIT_DST_RELEASE;
 873         team->dev->priv_flags = flags | dst_release_flag;
 874
 875         netdev_change_features(team->dev);
 876 }
 877
 878 static void team_compute_features(struct team *team)
 879 {
 880         mutex_lock(&team->lock);
 881         __team_compute_features(team);
 882         mutex_unlock(&team->lock);
 883 }
 884
 885 static int team_port_enter(struct team *team, struct team_port *port)
 886 {
 887         int err = 0;
 888
 889         dev_hold(team->dev);
 890         port->dev->priv_flags |= IFF_TEAM_PORT;
 891         if (team->ops.port_enter) {
 892                 err = team->ops.port_enter(team, port);
 893                 if (err) {
 894                         netdev_err(team->dev, "Device %s failed to enter team mode\n",
 895                                    port->dev->name);
 896                         goto err_port_enter;
 897                 }
 898         }
 899
 900         return 0;
 901
 902 err_port_enter:
 903         port->dev->priv_flags &= ~IFF_TEAM_PORT;
 904         dev_put(team->dev);
 905
 906         return err;
 907 }
 908
 909 static void team_port_leave(struct team *team, struct team_port *port)
 910 {
 911         if (team->ops.port_leave)
 912                 team->ops.port_leave(team, port);
 913         port->dev->priv_flags &= ~IFF_TEAM_PORT;
 914         dev_put(team->dev);
 915 }
 916
 917 #ifdef CONFIG_NET_POLL_CONTROLLER
 918 static int team_port_enable_netpoll(struct team *team, struct team_port *port,
 919                                     gfp_t gfp)
 920 {
 921         struct netpoll *np;
 922         int err;
 923
 924         np = kzalloc(sizeof(*np), gfp);
 925         if (!np)
 926                 return -ENOMEM;
 927
 928         err = __netpoll_setup(np, port->dev, gfp);
 929         if (err) {
 930                 kfree(np);
 931                 return err;
 932         }
 933         port->np = np;
 934         return err;
 935 }
 936
 937 static void team_port_disable_netpoll(struct team_port *port)
 938 {
 939         struct netpoll *np = port->np;
 940
 941         if (!np)
 942                 return;
 943         port->np = NULL;
 944
 945         /* Wait for transmitting packets to finish before freeing. */
 946         synchronize_rcu_bh();
 947         __netpoll_cleanup(np);
 948         kfree(np);
 949 }
 950
 951 static struct netpoll_info *team_netpoll_info(struct team *team)
 952 {
 953         return team->dev->npinfo;
 954 }
 955
 956 #else
 957 static int team_port_enable_netpoll(struct team *team, struct team_port *port,
 958                                     gfp_t gfp)
 959 {
 960         return 0;
 961 }
 962 static void team_port_disable_netpoll(struct team_port *port)
 963 {
 964 }
 965 static struct netpoll_info *team_netpoll_info(struct team *team)
 966 {
 967         return NULL;
 968 }
 969 #endif
 970
 971 static void __team_port_change_port_added(struct team_port *port, bool linkup);
 972 static int team_dev_type_check_change(struct net_device *dev,
 973                                       struct net_device *port_dev);
 974
 975 static int team_port_add(struct team *team, struct net_device *port_dev)
 976 {
 977         struct net_device *dev = team->dev;
 978         struct team_port *port;
 979         char *portname = port_dev->name;
 980         int err;
 981
 982         if (port_dev->flags & IFF_LOOPBACK) {
 983                 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
 984                            portname);
 985                 return -EINVAL;
 986         }
 987
 988         if (team_port_exists(port_dev)) {
 989                 netdev_err(dev, "Device %s is already a port "
 990                                 "of a team device\n", portname);
 991                 return -EBUSY;
 992         }
 993
 994         if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
 995             vlan_uses_dev(dev)) {
 996                 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
 997                            portname);
 998                 return -EPERM;
 999         }
1000
1001         err = team_dev_type_check_change(dev, port_dev);
1002         if (err)
1003                 return err;
1004
1005         if (port_dev->flags & IFF_UP) {
1006                 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1007                            portname);
1008                 return -EBUSY;
1009         }
1010
1011         port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1012                        GFP_KERNEL);
1013         if (!port)
1014                 return -ENOMEM;
1015
1016         port->dev = port_dev;
1017         port->team = team;
1018         INIT_LIST_HEAD(&port->qom_list);
1019
1020         port->orig.mtu = port_dev->mtu;
1021         err = dev_set_mtu(port_dev, dev->mtu);
1022         if (err) {
1023                 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1024                 goto err_set_mtu;
1025         }
1026
1027         memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1028
1029         err = team_port_enter(team, port);
1030         if (err) {
1031                 netdev_err(dev, "Device %s failed to enter team mode\n",
1032                            portname);
1033                 goto err_port_enter;
1034         }
1035
1036         err = dev_open(port_dev);
1037         if (err) {
1038                 netdev_dbg(dev, "Device %s opening failed\n",
1039                            portname);
1040                 goto err_dev_open;
1041         }
1042
1043         err = vlan_vids_add_by_dev(port_dev, dev);
1044         if (err) {
1045                 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1046                                 portname);
1047                 goto err_vids_add;
1048         }
1049
1050         if (team_netpoll_info(team)) {
1051                 err = team_port_enable_netpoll(team, port, GFP_KERNEL);
1052                 if (err) {
1053                         netdev_err(dev, "Failed to enable netpoll on device %s\n",
1054                                    portname);
1055                         goto err_enable_netpoll;
1056                 }
1057         }
1058
1059         err = netdev_master_upper_dev_link(port_dev, dev);
1060         if (err) {
1061                 netdev_err(dev, "Device %s failed to set upper link\n",
1062                            portname);
1063                 goto err_set_upper_link;
1064         }
1065
1066         err = netdev_rx_handler_register(port_dev, team_handle_frame,
1067                                          port);
1068         if (err) {
1069                 netdev_err(dev, "Device %s failed to register rx_handler\n",
1070                            portname);
1071                 goto err_handler_register;
1072         }
1073
1074         err = __team_option_inst_add_port(team, port);
1075         if (err) {
1076                 netdev_err(dev, "Device %s failed to add per-port options\n",
1077                            portname);
1078                 goto err_option_port_add;
1079         }
1080
1081         port->index = -1;
1082         team_port_enable(team, port);
1083         list_add_tail_rcu(&port->list, &team->port_list);
1084         __team_compute_features(team);
1085         __team_port_change_port_added(port, !!netif_carrier_ok(port_dev));
1086         __team_options_change_check(team);
1087
1088         netdev_info(dev, "Port device %s added\n", portname);
1089
1090         return 0;
1091
1092 err_option_port_add:
1093         netdev_rx_handler_unregister(port_dev);
1094
1095 err_handler_register:
1096         netdev_upper_dev_unlink(port_dev, dev);
1097
1098 err_set_upper_link:
1099         team_port_disable_netpoll(port);
1100
1101 err_enable_netpoll:
1102         vlan_vids_del_by_dev(port_dev, dev);
1103
1104 err_vids_add:
1105         dev_close(port_dev);
1106
1107 err_dev_open:
1108         team_port_leave(team, port);
1109         team_port_set_orig_dev_addr(port);
1110
1111 err_port_enter:
1112         dev_set_mtu(port_dev, port->orig.mtu);
1113
1114 err_set_mtu:
1115         kfree(port);
1116
1117         return err;
1118 }
1119
1120 static void __team_port_change_port_removed(struct team_port *port);
1121
1122 static int team_port_del(struct team *team, struct net_device *port_dev)
1123 {
1124         struct net_device *dev = team->dev;
1125         struct team_port *port;
1126         char *portname = port_dev->name;
1127
1128         port = team_port_get_rtnl(port_dev);
1129         if (!port || !team_port_find(team, port)) {
1130                 netdev_err(dev, "Device %s does not act as a port of this team\n",
1131                            portname);
1132                 return -ENOENT;
1133         }
1134
1135         team_port_disable(team, port);
1136         list_del_rcu(&port->list);
1137         netdev_rx_handler_unregister(port_dev);
1138         netdev_upper_dev_unlink(port_dev, dev);
1139         team_port_disable_netpoll(port);
1140         vlan_vids_del_by_dev(port_dev, dev);
1141         dev_close(port_dev);
1142         team_port_leave(team, port);
1143
1144         __team_option_inst_mark_removed_port(team, port);
1145         __team_options_change_check(team);
1146         __team_option_inst_del_port(team, port);
1147         __team_port_change_port_removed(port);
1148
1149         team_port_set_orig_dev_addr(port);
1150         dev_set_mtu(port_dev, port->orig.mtu);
1151         synchronize_rcu();
1152         kfree(port);
1153         netdev_info(dev, "Port device %s removed\n", portname);
1154         __team_compute_features(team);
1155
1156         return 0;
1157 }
1158
1159
1160 /*****************
1161  * Net device ops
1162  *****************/
1163
1164 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1165 {
1166         ctx->data.str_val = team->mode->kind;
1167         return 0;
1168 }
1169
1170 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1171 {
1172         return team_change_mode(team, ctx->data.str_val);
1173 }
1174
1175 static int team_port_en_option_get(struct team *team,
1176                                    struct team_gsetter_ctx *ctx)
1177 {
1178         struct team_port *port = ctx->info->port;
1179
1180         ctx->data.bool_val = team_port_enabled(port);
1181         return 0;
1182 }
1183
1184 static int team_port_en_option_set(struct team *team,
1185                                    struct team_gsetter_ctx *ctx)
1186 {
1187         struct team_port *port = ctx->info->port;
1188
1189         if (ctx->data.bool_val)
1190                 team_port_enable(team, port);
1191         else
1192                 team_port_disable(team, port);
1193         return 0;
1194 }
1195
1196 static int team_user_linkup_option_get(struct team *team,
1197                                        struct team_gsetter_ctx *ctx)
1198 {
1199         struct team_port *port = ctx->info->port;
1200
1201         ctx->data.bool_val = port->user.linkup;
1202         return 0;
1203 }
1204
1205 static int team_user_linkup_option_set(struct team *team,
1206                                        struct team_gsetter_ctx *ctx)
1207 {
1208         struct team_port *port = ctx->info->port;
1209
1210         port->user.linkup = ctx->data.bool_val;
1211         team_refresh_port_linkup(port);
1212         return 0;
1213 }
1214
1215 static int team_user_linkup_en_option_get(struct team *team,
1216                                           struct team_gsetter_ctx *ctx)
1217 {
1218         struct team_port *port = ctx->info->port;
1219
1220         ctx->data.bool_val = port->user.linkup_enabled;
1221         return 0;
1222 }
1223
1224 static int team_user_linkup_en_option_set(struct team *team,
1225                                           struct team_gsetter_ctx *ctx)
1226 {
1227         struct team_port *port = ctx->info->port;
1228
1229         port->user.linkup_enabled = ctx->data.bool_val;
1230         team_refresh_port_linkup(port);
1231         return 0;
1232 }
1233
1234 static int team_priority_option_get(struct team *team,
1235                                     struct team_gsetter_ctx *ctx)
1236 {
1237         struct team_port *port = ctx->info->port;
1238
1239         ctx->data.s32_val = port->priority;
1240         return 0;
1241 }
1242
1243 static int team_priority_option_set(struct team *team,
1244                                     struct team_gsetter_ctx *ctx)
1245 {
1246         struct team_port *port = ctx->info->port;
1247
1248         port->priority = ctx->data.s32_val;
1249         team_queue_override_port_refresh(team, port);
1250         return 0;
1251 }
1252
1253 static int team_queue_id_option_get(struct team *team,
1254                                     struct team_gsetter_ctx *ctx)
1255 {
1256         struct team_port *port = ctx->info->port;
1257
1258         ctx->data.u32_val = port->queue_id;
1259         return 0;
1260 }
1261
1262 static int team_queue_id_option_set(struct team *team,
1263                                     struct team_gsetter_ctx *ctx)
1264 {
1265         struct team_port *port = ctx->info->port;
1266
1267         if (port->queue_id == ctx->data.u32_val)
1268                 return 0;
1269         if (ctx->data.u32_val >= team->dev->real_num_tx_queues)
1270                 return -EINVAL;
1271         port->queue_id = ctx->data.u32_val;
1272         team_queue_override_port_refresh(team, port);
1273         return 0;
1274 }
1275
1276
1277 static const struct team_option team_options[] = {
1278         {
1279                 .name = "mode",
1280                 .type = TEAM_OPTION_TYPE_STRING,
1281                 .getter = team_mode_option_get,
1282                 .setter = team_mode_option_set,
1283         },
1284         {
1285                 .name = "enabled",
1286                 .type = TEAM_OPTION_TYPE_BOOL,
1287                 .per_port = true,
1288                 .getter = team_port_en_option_get,
1289                 .setter = team_port_en_option_set,
1290         },
1291         {
1292                 .name = "user_linkup",
1293                 .type = TEAM_OPTION_TYPE_BOOL,
1294                 .per_port = true,
1295                 .getter = team_user_linkup_option_get,
1296                 .setter = team_user_linkup_option_set,
1297         },
1298         {
1299                 .name = "user_linkup_enabled",
1300                 .type = TEAM_OPTION_TYPE_BOOL,
1301                 .per_port = true,
1302                 .getter = team_user_linkup_en_option_get,
1303                 .setter = team_user_linkup_en_option_set,
1304         },
1305         {
1306                 .name = "priority",
1307                 .type = TEAM_OPTION_TYPE_S32,
1308                 .per_port = true,
1309                 .getter = team_priority_option_get,
1310                 .setter = team_priority_option_set,
1311         },
1312         {
1313                 .name = "queue_id",
1314                 .type = TEAM_OPTION_TYPE_U32,
1315                 .per_port = true,
1316                 .getter = team_queue_id_option_get,
1317                 .setter = team_queue_id_option_set,
1318         },
1319 };
1320
1321 static struct lock_class_key team_netdev_xmit_lock_key;
1322 static struct lock_class_key team_netdev_addr_lock_key;
1323 static struct lock_class_key team_tx_busylock_key;
1324
1325 static void team_set_lockdep_class_one(struct net_device *dev,
1326                                        struct netdev_queue *txq,
1327                                        void *unused)
1328 {
1329         lockdep_set_class(&txq->_xmit_lock, &team_netdev_xmit_lock_key);
1330 }
1331
1332 static void team_set_lockdep_class(struct net_device *dev)
1333 {
1334         lockdep_set_class(&dev->addr_list_lock, &team_netdev_addr_lock_key);
1335         netdev_for_each_tx_queue(dev, team_set_lockdep_class_one, NULL);
1336         dev->qdisc_tx_busylock = &team_tx_busylock_key;
1337 }
1338
1339 static int team_init(struct net_device *dev)
1340 {
1341         struct team *team = netdev_priv(dev);
1342         int i;
1343         int err;
1344
1345         team->dev = dev;
1346         mutex_init(&team->lock);
1347         team_set_no_mode(team);
1348
1349         team->pcpu_stats = alloc_percpu(struct team_pcpu_stats);
1350         if (!team->pcpu_stats)
1351                 return -ENOMEM;
1352
1353         for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1354                 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1355         INIT_LIST_HEAD(&team->port_list);
1356         err = team_queue_override_init(team);
1357         if (err)
1358                 goto err_team_queue_override_init;
1359
1360         team_adjust_ops(team);
1361
1362         INIT_LIST_HEAD(&team->option_list);
1363         INIT_LIST_HEAD(&team->option_inst_list);
1364         err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1365         if (err)
1366                 goto err_options_register;
1367         netif_carrier_off(dev);
1368
1369         team_set_lockdep_class(dev);
1370
1371         return 0;
1372
1373 err_options_register:
1374         team_queue_override_fini(team);
1375 err_team_queue_override_init:
1376         free_percpu(team->pcpu_stats);
1377
1378         return err;
1379 }
1380
1381 static void team_uninit(struct net_device *dev)
1382 {
1383         struct team *team = netdev_priv(dev);
1384         struct team_port *port;
1385         struct team_port *tmp;
1386
1387         mutex_lock(&team->lock);
1388         list_for_each_entry_safe(port, tmp, &team->port_list, list)
1389                 team_port_del(team, port->dev);
1390
1391         __team_change_mode(team, NULL); /* cleanup */
1392         __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1393         team_queue_override_fini(team);
1394         mutex_unlock(&team->lock);
1395 }
1396
1397 static void team_destructor(struct net_device *dev)
1398 {
1399         struct team *team = netdev_priv(dev);
1400
1401         free_percpu(team->pcpu_stats);
1402         free_netdev(dev);
1403 }
1404
1405 static int team_open(struct net_device *dev)
1406 {
1407         return 0;
1408 }
1409
1410 static int team_close(struct net_device *dev)
1411 {
1412         return 0;
1413 }
1414
1415 /*
1416  * note: already called with rcu_read_lock
1417  */
1418 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1419 {
1420         struct team *team = netdev_priv(dev);
1421         bool tx_success;
1422         unsigned int len = skb->len;
1423
1424         tx_success = team_queue_override_transmit(team, skb);
1425         if (!tx_success)
1426                 tx_success = team->ops.transmit(team, skb);
1427         if (tx_success) {
1428                 struct team_pcpu_stats *pcpu_stats;
1429
1430                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1431                 u64_stats_update_begin(&pcpu_stats->syncp);
1432                 pcpu_stats->tx_packets++;
1433                 pcpu_stats->tx_bytes += len;
1434                 u64_stats_update_end(&pcpu_stats->syncp);
1435         } else {
1436                 this_cpu_inc(team->pcpu_stats->tx_dropped);
1437         }
1438
1439         return NETDEV_TX_OK;
1440 }
1441
1442 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb)
1443 {
1444         /*
1445          * This helper function exists to help dev_pick_tx get the correct
1446          * destination queue.  Using a helper function skips a call to
1447          * skb_tx_hash and will put the skbs in the queue we expect on their
1448          * way down to the team driver.
1449          */
1450         u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1451
1452         /*
1453          * Save the original txq to restore before passing to the driver
1454          */
1455         qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1456
1457         if (unlikely(txq >= dev->real_num_tx_queues)) {
1458                 do {
1459                         txq -= dev->real_num_tx_queues;
1460                 } while (txq >= dev->real_num_tx_queues);
1461         }
1462         return txq;
1463 }
1464
1465 static void team_change_rx_flags(struct net_device *dev, int change)
1466 {
1467         struct team *team = netdev_priv(dev);
1468         struct team_port *port;
1469         int inc;
1470
1471         rcu_read_lock();
1472         list_for_each_entry_rcu(port, &team->port_list, list) {
1473                 if (change & IFF_PROMISC) {
1474                         inc = dev->flags & IFF_PROMISC ? 1 : -1;
1475                         dev_set_promiscuity(port->dev, inc);
1476                 }
1477                 if (change & IFF_ALLMULTI) {
1478                         inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1479                         dev_set_allmulti(port->dev, inc);
1480                 }
1481         }
1482         rcu_read_unlock();
1483 }
1484
1485 static void team_set_rx_mode(struct net_device *dev)
1486 {
1487         struct team *team = netdev_priv(dev);
1488         struct team_port *port;
1489
1490         rcu_read_lock();
1491         list_for_each_entry_rcu(port, &team->port_list, list) {
1492                 dev_uc_sync(port->dev, dev);
1493                 dev_mc_sync(port->dev, dev);
1494         }
1495         rcu_read_unlock();
1496 }
1497
1498 static int team_set_mac_address(struct net_device *dev, void *p)
1499 {
1500         struct sockaddr *addr = p;
1501         struct team *team = netdev_priv(dev);
1502         struct team_port *port;
1503
1504         if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1505                 return -EADDRNOTAVAIL;
1506         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1507         rcu_read_lock();
1508         list_for_each_entry_rcu(port, &team->port_list, list)
1509                 if (team->ops.port_change_dev_addr)
1510                         team->ops.port_change_dev_addr(team, port);
1511         rcu_read_unlock();
1512         return 0;
1513 }
1514
1515 static int team_change_mtu(struct net_device *dev, int new_mtu)
1516 {
1517         struct team *team = netdev_priv(dev);
1518         struct team_port *port;
1519         int err;
1520
1521         /*
1522          * Alhough this is reader, it's guarded by team lock. It's not possible
1523          * to traverse list in reverse under rcu_read_lock
1524          */
1525         mutex_lock(&team->lock);
1526         list_for_each_entry(port, &team->port_list, list) {
1527                 err = dev_set_mtu(port->dev, new_mtu);
1528                 if (err) {
1529                         netdev_err(dev, "Device %s failed to change mtu",
1530                                    port->dev->name);
1531                         goto unwind;
1532                 }
1533         }
1534         mutex_unlock(&team->lock);
1535
1536         dev->mtu = new_mtu;
1537
1538         return 0;
1539
1540 unwind:
1541         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1542                 dev_set_mtu(port->dev, dev->mtu);
1543         mutex_unlock(&team->lock);
1544
1545         return err;
1546 }
1547
1548 static struct rtnl_link_stats64 *
1549 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1550 {
1551         struct team *team = netdev_priv(dev);
1552         struct team_pcpu_stats *p;
1553         u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1554         u32 rx_dropped = 0, tx_dropped = 0;
1555         unsigned int start;
1556         int i;
1557
1558         for_each_possible_cpu(i) {
1559                 p = per_cpu_ptr(team->pcpu_stats, i);
1560                 do {
1561                         start = u64_stats_fetch_begin_bh(&p->syncp);
1562                         rx_packets      = p->rx_packets;
1563                         rx_bytes        = p->rx_bytes;
1564                         rx_multicast    = p->rx_multicast;
1565                         tx_packets      = p->tx_packets;
1566                         tx_bytes        = p->tx_bytes;
1567                 } while (u64_stats_fetch_retry_bh(&p->syncp, start));
1568
1569                 stats->rx_packets       += rx_packets;
1570                 stats->rx_bytes         += rx_bytes;
1571                 stats->multicast        += rx_multicast;
1572                 stats->tx_packets       += tx_packets;
1573                 stats->tx_bytes         += tx_bytes;
1574                 /*
1575                  * rx_dropped & tx_dropped are u32, updated
1576                  * without syncp protection.
1577                  */
1578                 rx_dropped      += p->rx_dropped;
1579                 tx_dropped      += p->tx_dropped;
1580         }
1581         stats->rx_dropped       = rx_dropped;
1582         stats->tx_dropped       = tx_dropped;
1583         return stats;
1584 }
1585
1586 static int team_vlan_rx_add_vid(struct net_device *dev, uint16_t vid)
1587 {
1588         struct team *team = netdev_priv(dev);
1589         struct team_port *port;
1590         int err;
1591
1592         /*
1593          * Alhough this is reader, it's guarded by team lock. It's not possible
1594          * to traverse list in reverse under rcu_read_lock
1595          */
1596         mutex_lock(&team->lock);
1597         list_for_each_entry(port, &team->port_list, list) {
1598                 err = vlan_vid_add(port->dev, vid);
1599                 if (err)
1600                         goto unwind;
1601         }
1602         mutex_unlock(&team->lock);
1603
1604         return 0;
1605
1606 unwind:
1607         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1608                 vlan_vid_del(port->dev, vid);
1609         mutex_unlock(&team->lock);
1610
1611         return err;
1612 }
1613
1614 static int team_vlan_rx_kill_vid(struct net_device *dev, uint16_t vid)
1615 {
1616         struct team *team = netdev_priv(dev);
1617         struct team_port *port;
1618
1619         rcu_read_lock();
1620         list_for_each_entry_rcu(port, &team->port_list, list)
1621                 vlan_vid_del(port->dev, vid);
1622         rcu_read_unlock();
1623
1624         return 0;
1625 }
1626
1627 #ifdef CONFIG_NET_POLL_CONTROLLER
1628 static void team_poll_controller(struct net_device *dev)
1629 {
1630 }
1631
1632 static void __team_netpoll_cleanup(struct team *team)
1633 {
1634         struct team_port *port;
1635
1636         list_for_each_entry(port, &team->port_list, list)
1637                 team_port_disable_netpoll(port);
1638 }
1639
1640 static void team_netpoll_cleanup(struct net_device *dev)
1641 {
1642         struct team *team = netdev_priv(dev);
1643
1644         mutex_lock(&team->lock);
1645         __team_netpoll_cleanup(team);
1646         mutex_unlock(&team->lock);
1647 }
1648
1649 static int team_netpoll_setup(struct net_device *dev,
1650                               struct netpoll_info *npifo, gfp_t gfp)
1651 {
1652         struct team *team = netdev_priv(dev);
1653         struct team_port *port;
1654         int err = 0;
1655
1656         mutex_lock(&team->lock);
1657         list_for_each_entry(port, &team->port_list, list) {
1658                 err = team_port_enable_netpoll(team, port, gfp);
1659                 if (err) {
1660                         __team_netpoll_cleanup(team);
1661                         break;
1662                 }
1663         }
1664         mutex_unlock(&team->lock);
1665         return err;
1666 }
1667 #endif
1668
1669 static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
1670 {
1671         struct team *team = netdev_priv(dev);
1672         int err;
1673
1674         mutex_lock(&team->lock);
1675         err = team_port_add(team, port_dev);
1676         mutex_unlock(&team->lock);
1677         return err;
1678 }
1679
1680 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1681 {
1682         struct team *team = netdev_priv(dev);
1683         int err;
1684
1685         mutex_lock(&team->lock);
1686         err = team_port_del(team, port_dev);
1687         mutex_unlock(&team->lock);
1688         return err;
1689 }
1690
1691 static netdev_features_t team_fix_features(struct net_device *dev,
1692                                            netdev_features_t features)
1693 {
1694         struct team_port *port;
1695         struct team *team = netdev_priv(dev);
1696         netdev_features_t mask;
1697
1698         mask = features;
1699         features &= ~NETIF_F_ONE_FOR_ALL;
1700         features |= NETIF_F_ALL_FOR_ALL;
1701
1702         rcu_read_lock();
1703         list_for_each_entry_rcu(port, &team->port_list, list) {
1704                 features = netdev_increment_features(features,
1705                                                      port->dev->features,
1706                                                      mask);
1707         }
1708         rcu_read_unlock();
1709         return features;
1710 }
1711
1712 static int team_change_carrier(struct net_device *dev, bool new_carrier)
1713 {
1714         struct team *team = netdev_priv(dev);
1715
1716         team->user_carrier_enabled = true;
1717
1718         if (new_carrier)
1719                 netif_carrier_on(dev);
1720         else
1721                 netif_carrier_off(dev);
1722         return 0;
1723 }
1724
1725 static const struct net_device_ops team_netdev_ops = {
1726         .ndo_init               = team_init,
1727         .ndo_uninit             = team_uninit,
1728         .ndo_open               = team_open,
1729         .ndo_stop               = team_close,
1730         .ndo_start_xmit         = team_xmit,
1731         .ndo_select_queue       = team_select_queue,
1732         .ndo_change_rx_flags    = team_change_rx_flags,
1733         .ndo_set_rx_mode        = team_set_rx_mode,
1734         .ndo_set_mac_address    = team_set_mac_address,
1735         .ndo_change_mtu         = team_change_mtu,
1736         .ndo_get_stats64        = team_get_stats64,
1737         .ndo_vlan_rx_add_vid    = team_vlan_rx_add_vid,
1738         .ndo_vlan_rx_kill_vid   = team_vlan_rx_kill_vid,
1739 #ifdef CONFIG_NET_POLL_CONTROLLER
1740         .ndo_poll_controller    = team_poll_controller,
1741         .ndo_netpoll_setup      = team_netpoll_setup,
1742         .ndo_netpoll_cleanup    = team_netpoll_cleanup,
1743 #endif
1744         .ndo_add_slave          = team_add_slave,
1745         .ndo_del_slave          = team_del_slave,
1746         .ndo_fix_features       = team_fix_features,
1747         .ndo_change_carrier     = team_change_carrier,
1748 };
1749
1750 /***********************
1751  * ethtool interface
1752  ***********************/
1753
1754 static void team_ethtool_get_drvinfo(struct net_device *dev,
1755                                      struct ethtool_drvinfo *drvinfo)
1756 {
1757         strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
1758         strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
1759 }
1760
1761 static const struct ethtool_ops team_ethtool_ops = {
1762         .get_drvinfo            = team_ethtool_get_drvinfo,
1763         .get_link               = ethtool_op_get_link,
1764 };
1765
1766 /***********************
1767  * rt netlink interface
1768  ***********************/
1769
1770 static void team_setup_by_port(struct net_device *dev,
1771                                struct net_device *port_dev)
1772 {
1773         dev->header_ops = port_dev->header_ops;
1774         dev->type = port_dev->type;
1775         dev->hard_header_len = port_dev->hard_header_len;
1776         dev->addr_len = port_dev->addr_len;
1777         dev->mtu = port_dev->mtu;
1778         memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
1779         memcpy(dev->dev_addr, port_dev->dev_addr, port_dev->addr_len);
1780 }
1781
1782 static int team_dev_type_check_change(struct net_device *dev,
1783                                       struct net_device *port_dev)
1784 {
1785         struct team *team = netdev_priv(dev);
1786         char *portname = port_dev->name;
1787         int err;
1788
1789         if (dev->type == port_dev->type)
1790                 return 0;
1791         if (!list_empty(&team->port_list)) {
1792                 netdev_err(dev, "Device %s is of different type\n", portname);
1793                 return -EBUSY;
1794         }
1795         err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
1796         err = notifier_to_errno(err);
1797         if (err) {
1798                 netdev_err(dev, "Refused to change device type\n");
1799                 return err;
1800         }
1801         dev_uc_flush(dev);
1802         dev_mc_flush(dev);
1803         team_setup_by_port(dev, port_dev);
1804         call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
1805         return 0;
1806 }
1807
1808 static void team_setup(struct net_device *dev)
1809 {
1810         ether_setup(dev);
1811
1812         dev->netdev_ops = &team_netdev_ops;
1813         dev->ethtool_ops = &team_ethtool_ops;
1814         dev->destructor = team_destructor;
1815         dev->tx_queue_len = 0;
1816         dev->flags |= IFF_MULTICAST;
1817         dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
1818
1819         /*
1820          * Indicate we support unicast address filtering. That way core won't
1821          * bring us to promisc mode in case a unicast addr is added.
1822          * Let this up to underlay drivers.
1823          */
1824         dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
1825
1826         dev->features |= NETIF_F_LLTX;
1827         dev->features |= NETIF_F_GRO;
1828         dev->hw_features = TEAM_VLAN_FEATURES |
1829                            NETIF_F_HW_VLAN_TX |
1830                            NETIF_F_HW_VLAN_RX |
1831                            NETIF_F_HW_VLAN_FILTER;
1832
1833         dev->hw_features &= ~(NETIF_F_ALL_CSUM & ~NETIF_F_HW_CSUM);
1834         dev->features |= dev->hw_features;
1835 }
1836
1837 static int team_newlink(struct net *src_net, struct net_device *dev,
1838                         struct nlattr *tb[], struct nlattr *data[])
1839 {
1840         int err;
1841
1842         if (tb[IFLA_ADDRESS] == NULL)
1843                 eth_hw_addr_random(dev);
1844
1845         err = register_netdevice(dev);
1846         if (err)
1847                 return err;
1848
1849         return 0;
1850 }
1851
1852 static int team_validate(struct nlattr *tb[], struct nlattr *data[])
1853 {
1854         if (tb[IFLA_ADDRESS]) {
1855                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
1856                         return -EINVAL;
1857                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
1858                         return -EADDRNOTAVAIL;
1859         }
1860         return 0;
1861 }
1862
1863 static unsigned int team_get_num_tx_queues(void)
1864 {
1865         return TEAM_DEFAULT_NUM_TX_QUEUES;
1866 }
1867
1868 static unsigned int team_get_num_rx_queues(void)
1869 {
1870         return TEAM_DEFAULT_NUM_RX_QUEUES;
1871 }
1872
1873 static struct rtnl_link_ops team_link_ops __read_mostly = {
1874         .kind                   = DRV_NAME,
1875         .priv_size              = sizeof(struct team),
1876         .setup                  = team_setup,
1877         .newlink                = team_newlink,
1878         .validate               = team_validate,
1879         .get_num_tx_queues      = team_get_num_tx_queues,
1880         .get_num_rx_queues      = team_get_num_rx_queues,
1881 };
1882
1883
1884 /***********************************
1885  * Generic netlink custom interface
1886  ***********************************/
1887
1888 static struct genl_family team_nl_family = {
1889         .id             = GENL_ID_GENERATE,
1890         .name           = TEAM_GENL_NAME,
1891         .version        = TEAM_GENL_VERSION,
1892         .maxattr        = TEAM_ATTR_MAX,
1893         .netnsok        = true,
1894 };
1895
1896 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
1897         [TEAM_ATTR_UNSPEC]                      = { .type = NLA_UNSPEC, },
1898         [TEAM_ATTR_TEAM_IFINDEX]                = { .type = NLA_U32 },
1899         [TEAM_ATTR_LIST_OPTION]                 = { .type = NLA_NESTED },
1900         [TEAM_ATTR_LIST_PORT]                   = { .type = NLA_NESTED },
1901 };
1902
1903 static const struct nla_policy
1904 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
1905         [TEAM_ATTR_OPTION_UNSPEC]               = { .type = NLA_UNSPEC, },
1906         [TEAM_ATTR_OPTION_NAME] = {
1907                 .type = NLA_STRING,
1908                 .len = TEAM_STRING_MAX_LEN,
1909         },
1910         [TEAM_ATTR_OPTION_CHANGED]              = { .type = NLA_FLAG },
1911         [TEAM_ATTR_OPTION_TYPE]                 = { .type = NLA_U8 },
1912         [TEAM_ATTR_OPTION_DATA]                 = { .type = NLA_BINARY },
1913 };
1914
1915 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
1916 {
1917         struct sk_buff *msg;
1918         void *hdr;
1919         int err;
1920
1921         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1922         if (!msg)
1923                 return -ENOMEM;
1924
1925         hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
1926                           &team_nl_family, 0, TEAM_CMD_NOOP);
1927         if (!hdr) {
1928                 err = -EMSGSIZE;
1929                 goto err_msg_put;
1930         }
1931
1932         genlmsg_end(msg, hdr);
1933
1934         return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
1935
1936 err_msg_put:
1937         nlmsg_free(msg);
1938
1939         return err;
1940 }
1941
1942 /*
1943  * Netlink cmd functions should be locked by following two functions.
1944  * Since dev gets held here, that ensures dev won't disappear in between.
1945  */
1946 static struct team *team_nl_team_get(struct genl_info *info)
1947 {
1948         struct net *net = genl_info_net(info);
1949         int ifindex;
1950         struct net_device *dev;
1951         struct team *team;
1952
1953         if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
1954                 return NULL;
1955
1956         ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
1957         dev = dev_get_by_index(net, ifindex);
1958         if (!dev || dev->netdev_ops != &team_netdev_ops) {
1959                 if (dev)
1960                         dev_put(dev);
1961                 return NULL;
1962         }
1963
1964         team = netdev_priv(dev);
1965         mutex_lock(&team->lock);
1966         return team;
1967 }
1968
1969 static void team_nl_team_put(struct team *team)
1970 {
1971         mutex_unlock(&team->lock);
1972         dev_put(team->dev);
1973 }
1974
1975 typedef int team_nl_send_func_t(struct sk_buff *skb,
1976                                 struct team *team, u32 portid);
1977
1978 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
1979 {
1980         return genlmsg_unicast(dev_net(team->dev), skb, portid);
1981 }
1982
1983 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
1984                                        struct team_option_inst *opt_inst)
1985 {
1986         struct nlattr *option_item;
1987         struct team_option *option = opt_inst->option;
1988         struct team_option_inst_info *opt_inst_info = &opt_inst->info;
1989         struct team_gsetter_ctx ctx;
1990         int err;
1991
1992         ctx.info = opt_inst_info;
1993         err = team_option_get(team, opt_inst, &ctx);
1994         if (err)
1995                 return err;
1996
1997         option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
1998         if (!option_item)
1999                 return -EMSGSIZE;
2000
2001         if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2002                 goto nest_cancel;
2003         if (opt_inst_info->port &&
2004             nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2005                         opt_inst_info->port->dev->ifindex))
2006                 goto nest_cancel;
2007         if (opt_inst->option->array_size &&
2008             nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2009                         opt_inst_info->array_index))
2010                 goto nest_cancel;
2011
2012         switch (option->type) {
2013         case TEAM_OPTION_TYPE_U32:
2014                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2015                         goto nest_cancel;
2016                 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2017                         goto nest_cancel;
2018                 break;
2019         case TEAM_OPTION_TYPE_STRING:
2020                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2021                         goto nest_cancel;
2022                 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2023                                    ctx.data.str_val))
2024                         goto nest_cancel;
2025                 break;
2026         case TEAM_OPTION_TYPE_BINARY:
2027                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2028                         goto nest_cancel;
2029                 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2030                             ctx.data.bin_val.ptr))
2031                         goto nest_cancel;
2032                 break;
2033         case TEAM_OPTION_TYPE_BOOL:
2034                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2035                         goto nest_cancel;
2036                 if (ctx.data.bool_val &&
2037                     nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2038                         goto nest_cancel;
2039                 break;
2040         case TEAM_OPTION_TYPE_S32:
2041                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2042                         goto nest_cancel;
2043                 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2044                         goto nest_cancel;
2045                 break;
2046         default:
2047                 BUG();
2048         }
2049         if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2050                 goto nest_cancel;
2051         if (opt_inst->changed) {
2052                 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2053                         goto nest_cancel;
2054                 opt_inst->changed = false;
2055         }
2056         nla_nest_end(skb, option_item);
2057         return 0;
2058
2059 nest_cancel:
2060         nla_nest_cancel(skb, option_item);
2061         return -EMSGSIZE;
2062 }
2063
2064 static int __send_and_alloc_skb(struct sk_buff **pskb,
2065                                 struct team *team, u32 portid,
2066                                 team_nl_send_func_t *send_func)
2067 {
2068         int err;
2069
2070         if (*pskb) {
2071                 err = send_func(*pskb, team, portid);
2072                 if (err)
2073                         return err;
2074         }
2075         *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2076         if (!*pskb)
2077                 return -ENOMEM;
2078         return 0;
2079 }
2080
2081 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2082                                     int flags, team_nl_send_func_t *send_func,
2083                                     struct list_head *sel_opt_inst_list)
2084 {
2085         struct nlattr *option_list;
2086         struct nlmsghdr *nlh;
2087         void *hdr;
2088         struct team_option_inst *opt_inst;
2089         int err;
2090         struct sk_buff *skb = NULL;
2091         bool incomplete;
2092         int i;
2093
2094         opt_inst = list_first_entry(sel_opt_inst_list,
2095                                     struct team_option_inst, tmp_list);
2096
2097 start_again:
2098         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2099         if (err)
2100                 return err;
2101
2102         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2103                           TEAM_CMD_OPTIONS_GET);
2104         if (!hdr)
2105                 return -EMSGSIZE;
2106
2107         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2108                 goto nla_put_failure;
2109         option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2110         if (!option_list)
2111                 goto nla_put_failure;
2112
2113         i = 0;
2114         incomplete = false;
2115         list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2116                 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2117                 if (err) {
2118                         if (err == -EMSGSIZE) {
2119                                 if (!i)
2120                                         goto errout;
2121                                 incomplete = true;
2122                                 break;
2123                         }
2124                         goto errout;
2125                 }
2126                 i++;
2127         }
2128
2129         nla_nest_end(skb, option_list);
2130         genlmsg_end(skb, hdr);
2131         if (incomplete)
2132                 goto start_again;
2133
2134 send_done:
2135         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2136         if (!nlh) {
2137                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2138                 if (err)
2139                         goto errout;
2140                 goto send_done;
2141         }
2142
2143         return send_func(skb, team, portid);
2144
2145 nla_put_failure:
2146         err = -EMSGSIZE;
2147 errout:
2148         genlmsg_cancel(skb, hdr);
2149         nlmsg_free(skb);
2150         return err;
2151 }
2152
2153 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2154 {
2155         struct team *team;
2156         struct team_option_inst *opt_inst;
2157         int err;
2158         LIST_HEAD(sel_opt_inst_list);
2159
2160         team = team_nl_team_get(info);
2161         if (!team)
2162                 return -EINVAL;
2163
2164         list_for_each_entry(opt_inst, &team->option_inst_list, list)
2165                 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2166         err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2167                                        NLM_F_ACK, team_nl_send_unicast,
2168                                        &sel_opt_inst_list);
2169
2170         team_nl_team_put(team);
2171
2172         return err;
2173 }
2174
2175 static int team_nl_send_event_options_get(struct team *team,
2176                                           struct list_head *sel_opt_inst_list);
2177
2178 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2179 {
2180         struct team *team;
2181         int err = 0;
2182         int i;
2183         struct nlattr *nl_option;
2184         LIST_HEAD(opt_inst_list);
2185
2186         team = team_nl_team_get(info);
2187         if (!team)
2188                 return -EINVAL;
2189
2190         err = -EINVAL;
2191         if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2192                 err = -EINVAL;
2193                 goto team_put;
2194         }
2195
2196         nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2197                 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2198                 struct nlattr *attr;
2199                 struct nlattr *attr_data;
2200                 enum team_option_type opt_type;
2201                 int opt_port_ifindex = 0; /* != 0 for per-port options */
2202                 u32 opt_array_index = 0;
2203                 bool opt_is_array = false;
2204                 struct team_option_inst *opt_inst;
2205                 char *opt_name;
2206                 bool opt_found = false;
2207
2208                 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2209                         err = -EINVAL;
2210                         goto team_put;
2211                 }
2212                 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2213                                        nl_option, team_nl_option_policy);
2214                 if (err)
2215                         goto team_put;
2216                 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2217                     !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2218                         err = -EINVAL;
2219                         goto team_put;
2220                 }
2221                 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2222                 case NLA_U32:
2223                         opt_type = TEAM_OPTION_TYPE_U32;
2224                         break;
2225                 case NLA_STRING:
2226                         opt_type = TEAM_OPTION_TYPE_STRING;
2227                         break;
2228                 case NLA_BINARY:
2229                         opt_type = TEAM_OPTION_TYPE_BINARY;
2230                         break;
2231                 case NLA_FLAG:
2232                         opt_type = TEAM_OPTION_TYPE_BOOL;
2233                         break;
2234                 case NLA_S32:
2235                         opt_type = TEAM_OPTION_TYPE_S32;
2236                         break;
2237                 default:
2238                         goto team_put;
2239                 }
2240
2241                 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2242                 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2243                         err = -EINVAL;
2244                         goto team_put;
2245                 }
2246
2247                 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2248                 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2249                 if (attr)
2250                         opt_port_ifindex = nla_get_u32(attr);
2251
2252                 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2253                 if (attr) {
2254                         opt_is_array = true;
2255                         opt_array_index = nla_get_u32(attr);
2256                 }
2257
2258                 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2259                         struct team_option *option = opt_inst->option;
2260                         struct team_gsetter_ctx ctx;
2261                         struct team_option_inst_info *opt_inst_info;
2262                         int tmp_ifindex;
2263
2264                         opt_inst_info = &opt_inst->info;
2265                         tmp_ifindex = opt_inst_info->port ?
2266                                       opt_inst_info->port->dev->ifindex : 0;
2267                         if (option->type != opt_type ||
2268                             strcmp(option->name, opt_name) ||
2269                             tmp_ifindex != opt_port_ifindex ||
2270                             (option->array_size && !opt_is_array) ||
2271                             opt_inst_info->array_index != opt_array_index)
2272                                 continue;
2273                         opt_found = true;
2274                         ctx.info = opt_inst_info;
2275                         switch (opt_type) {
2276                         case TEAM_OPTION_TYPE_U32:
2277                                 ctx.data.u32_val = nla_get_u32(attr_data);
2278                                 break;
2279                         case TEAM_OPTION_TYPE_STRING:
2280                                 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2281                                         err = -EINVAL;
2282                                         goto team_put;
2283                                 }
2284                                 ctx.data.str_val = nla_data(attr_data);
2285                                 break;
2286                         case TEAM_OPTION_TYPE_BINARY:
2287                                 ctx.data.bin_val.len = nla_len(attr_data);
2288                                 ctx.data.bin_val.ptr = nla_data(attr_data);
2289                                 break;
2290                         case TEAM_OPTION_TYPE_BOOL:
2291                                 ctx.data.bool_val = attr_data ? true : false;
2292                                 break;
2293                         case TEAM_OPTION_TYPE_S32:
2294                                 ctx.data.s32_val = nla_get_s32(attr_data);
2295                                 break;
2296                         default:
2297                                 BUG();
2298                         }
2299                         err = team_option_set(team, opt_inst, &ctx);
2300                         if (err)
2301                                 goto team_put;
2302                         opt_inst->changed = true;
2303                         list_add(&opt_inst->tmp_list, &opt_inst_list);
2304                 }
2305                 if (!opt_found) {
2306                         err = -ENOENT;
2307                         goto team_put;
2308                 }
2309         }
2310
2311         err = team_nl_send_event_options_get(team, &opt_inst_list);
2312
2313 team_put:
2314         team_nl_team_put(team);
2315
2316         return err;
2317 }
2318
2319 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2320                                      struct team_port *port)
2321 {
2322         struct nlattr *port_item;
2323
2324         port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2325         if (!port_item)
2326                 goto nest_cancel;
2327         if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2328                 goto nest_cancel;
2329         if (port->changed) {
2330                 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2331                         goto nest_cancel;
2332                 port->changed = false;
2333         }
2334         if ((port->removed &&
2335              nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2336             (port->state.linkup &&
2337              nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2338             nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2339             nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2340                 goto nest_cancel;
2341         nla_nest_end(skb, port_item);
2342         return 0;
2343
2344 nest_cancel:
2345         nla_nest_cancel(skb, port_item);
2346         return -EMSGSIZE;
2347 }
2348
2349 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2350                                       int flags, team_nl_send_func_t *send_func,
2351                                       struct team_port *one_port)
2352 {
2353         struct nlattr *port_list;
2354         struct nlmsghdr *nlh;
2355         void *hdr;
2356         struct team_port *port;
2357         int err;
2358         struct sk_buff *skb = NULL;
2359         bool incomplete;
2360         int i;
2361
2362         port = list_first_entry(&team->port_list, struct team_port, list);
2363
2364 start_again:
2365         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2366         if (err)
2367                 return err;
2368
2369         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2370                           TEAM_CMD_PORT_LIST_GET);
2371         if (!hdr)
2372                 return -EMSGSIZE;
2373
2374         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2375                 goto nla_put_failure;
2376         port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2377         if (!port_list)
2378                 goto nla_put_failure;
2379
2380         i = 0;
2381         incomplete = false;
2382
2383         /* If one port is selected, called wants to send port list containing
2384          * only this port. Otherwise go through all listed ports and send all
2385          */
2386         if (one_port) {
2387                 err = team_nl_fill_one_port_get(skb, one_port);
2388                 if (err)
2389                         goto errout;
2390         } else {
2391                 list_for_each_entry(port, &team->port_list, list) {
2392                         err = team_nl_fill_one_port_get(skb, port);
2393                         if (err) {
2394                                 if (err == -EMSGSIZE) {
2395                                         if (!i)
2396                                                 goto errout;
2397                                         incomplete = true;
2398                                         break;
2399                                 }
2400                                 goto errout;
2401                         }
2402                         i++;
2403                 }
2404         }
2405
2406         nla_nest_end(skb, port_list);
2407         genlmsg_end(skb, hdr);
2408         if (incomplete)
2409                 goto start_again;
2410
2411 send_done:
2412         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2413         if (!nlh) {
2414                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2415                 if (err)
2416                         goto errout;
2417                 goto send_done;
2418         }
2419
2420         return send_func(skb, team, portid);
2421
2422 nla_put_failure:
2423         err = -EMSGSIZE;
2424 errout:
2425         genlmsg_cancel(skb, hdr);
2426         nlmsg_free(skb);
2427         return err;
2428 }
2429
2430 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2431                                      struct genl_info *info)
2432 {
2433         struct team *team;
2434         int err;
2435
2436         team = team_nl_team_get(info);
2437         if (!team)
2438                 return -EINVAL;
2439
2440         err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2441                                          NLM_F_ACK, team_nl_send_unicast, NULL);
2442
2443         team_nl_team_put(team);
2444
2445         return err;
2446 }
2447
2448 static struct genl_ops team_nl_ops[] = {
2449         {
2450                 .cmd = TEAM_CMD_NOOP,
2451                 .doit = team_nl_cmd_noop,
2452                 .policy = team_nl_policy,
2453         },
2454         {
2455                 .cmd = TEAM_CMD_OPTIONS_SET,
2456                 .doit = team_nl_cmd_options_set,
2457                 .policy = team_nl_policy,
2458                 .flags = GENL_ADMIN_PERM,
2459         },
2460         {
2461                 .cmd = TEAM_CMD_OPTIONS_GET,
2462                 .doit = team_nl_cmd_options_get,
2463                 .policy = team_nl_policy,
2464                 .flags = GENL_ADMIN_PERM,
2465         },
2466         {
2467                 .cmd = TEAM_CMD_PORT_LIST_GET,
2468                 .doit = team_nl_cmd_port_list_get,
2469                 .policy = team_nl_policy,
2470                 .flags = GENL_ADMIN_PERM,
2471         },
2472 };
2473
2474 static struct genl_multicast_group team_change_event_mcgrp = {
2475         .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME,
2476 };
2477
2478 static int team_nl_send_multicast(struct sk_buff *skb,
2479                                   struct team *team, u32 portid)
2480 {
2481         return genlmsg_multicast_netns(dev_net(team->dev), skb, 0,
2482                                        team_change_event_mcgrp.id, GFP_KERNEL);
2483 }
2484
2485 static int team_nl_send_event_options_get(struct team *team,
2486                                           struct list_head *sel_opt_inst_list)
2487 {
2488         return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2489                                         sel_opt_inst_list);
2490 }
2491
2492 static int team_nl_send_event_port_get(struct team *team,
2493                                        struct team_port *port)
2494 {
2495         return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2496                                           port);
2497 }
2498
2499 static int team_nl_init(void)
2500 {
2501         int err;
2502
2503         err = genl_register_family_with_ops(&team_nl_family, team_nl_ops,
2504                                             ARRAY_SIZE(team_nl_ops));
2505         if (err)
2506                 return err;
2507
2508         err = genl_register_mc_group(&team_nl_family, &team_change_event_mcgrp);
2509         if (err)
2510                 goto err_change_event_grp_reg;
2511
2512         return 0;
2513
2514 err_change_event_grp_reg:
2515         genl_unregister_family(&team_nl_family);
2516
2517         return err;
2518 }
2519
2520 static void team_nl_fini(void)
2521 {
2522         genl_unregister_family(&team_nl_family);
2523 }
2524
2525
2526 /******************
2527  * Change checkers
2528  ******************/
2529
2530 static void __team_options_change_check(struct team *team)
2531 {
2532         int err;
2533         struct team_option_inst *opt_inst;
2534         LIST_HEAD(sel_opt_inst_list);
2535
2536         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2537                 if (opt_inst->changed)
2538                         list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2539         }
2540         err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2541         if (err && err != -ESRCH)
2542                 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2543                             err);
2544 }
2545
2546 /* rtnl lock is held */
2547
2548 static void __team_port_change_send(struct team_port *port, bool linkup)
2549 {
2550         int err;
2551
2552         port->changed = true;
2553         port->state.linkup = linkup;
2554         team_refresh_port_linkup(port);
2555         if (linkup) {
2556                 struct ethtool_cmd ecmd;
2557
2558                 err = __ethtool_get_settings(port->dev, &ecmd);
2559                 if (!err) {
2560                         port->state.speed = ethtool_cmd_speed(&ecmd);
2561                         port->state.duplex = ecmd.duplex;
2562                         goto send_event;
2563                 }
2564         }
2565         port->state.speed = 0;
2566         port->state.duplex = 0;
2567
2568 send_event:
2569         err = team_nl_send_event_port_get(port->team, port);
2570         if (err && err != -ESRCH)
2571                 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2572                             port->dev->name, err);
2573
2574 }
2575
2576 static void __team_carrier_check(struct team *team)
2577 {
2578         struct team_port *port;
2579         bool team_linkup;
2580
2581         if (team->user_carrier_enabled)
2582                 return;
2583
2584         team_linkup = false;
2585         list_for_each_entry(port, &team->port_list, list) {
2586                 if (port->linkup) {
2587                         team_linkup = true;
2588                         break;
2589                 }
2590         }
2591
2592         if (team_linkup)
2593                 netif_carrier_on(team->dev);
2594         else
2595                 netif_carrier_off(team->dev);
2596 }
2597
2598 static void __team_port_change_check(struct team_port *port, bool linkup)
2599 {
2600         if (port->state.linkup != linkup)
2601                 __team_port_change_send(port, linkup);
2602         __team_carrier_check(port->team);
2603 }
2604
2605 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2606 {
2607         __team_port_change_send(port, linkup);
2608         __team_carrier_check(port->team);
2609 }
2610
2611 static void __team_port_change_port_removed(struct team_port *port)
2612 {
2613         port->removed = true;
2614         __team_port_change_send(port, false);
2615         __team_carrier_check(port->team);
2616 }
2617
2618 static void team_port_change_check(struct team_port *port, bool linkup)
2619 {
2620         struct team *team = port->team;
2621
2622         mutex_lock(&team->lock);
2623         __team_port_change_check(port, linkup);
2624         mutex_unlock(&team->lock);
2625 }
2626
2627
2628 /************************************
2629  * Net device notifier event handler
2630  ************************************/
2631
2632 static int team_device_event(struct notifier_block *unused,
2633                              unsigned long event, void *ptr)
2634 {
2635         struct net_device *dev = (struct net_device *) ptr;
2636         struct team_port *port;
2637
2638         port = team_port_get_rtnl(dev);
2639         if (!port)
2640                 return NOTIFY_DONE;
2641
2642         switch (event) {
2643         case NETDEV_UP:
2644                 if (netif_carrier_ok(dev))
2645                         team_port_change_check(port, true);
2646         case NETDEV_DOWN:
2647                 team_port_change_check(port, false);
2648         case NETDEV_CHANGE:
2649                 if (netif_running(port->dev))
2650                         team_port_change_check(port,
2651                                                !!netif_carrier_ok(port->dev));
2652                 break;
2653         case NETDEV_UNREGISTER:
2654                 team_del_slave(port->team->dev, dev);
2655                 break;
2656         case NETDEV_FEAT_CHANGE:
2657                 team_compute_features(port->team);
2658                 break;
2659         case NETDEV_CHANGEMTU:
2660                 /* Forbid to change mtu of underlaying device */
2661                 return NOTIFY_BAD;
2662         case NETDEV_PRE_TYPE_CHANGE:
2663                 /* Forbid to change type of underlaying device */
2664                 return NOTIFY_BAD;
2665         }
2666         return NOTIFY_DONE;
2667 }
2668
2669 static struct notifier_block team_notifier_block __read_mostly = {
2670         .notifier_call = team_device_event,
2671 };
2672
2673
2674 /***********************
2675  * Module init and exit
2676  ***********************/
2677
2678 static int __init team_module_init(void)
2679 {
2680         int err;
2681
2682         register_netdevice_notifier(&team_notifier_block);
2683
2684         err = rtnl_link_register(&team_link_ops);
2685         if (err)
2686                 goto err_rtnl_reg;
2687
2688         err = team_nl_init();
2689         if (err)
2690                 goto err_nl_init;
2691
2692         return 0;
2693
2694 err_nl_init:
2695         rtnl_link_unregister(&team_link_ops);
2696
2697 err_rtnl_reg:
2698         unregister_netdevice_notifier(&team_notifier_block);
2699
2700         return err;
2701 }
2702
2703 static void __exit team_module_exit(void)
2704 {
2705         team_nl_fini();
2706         rtnl_link_unregister(&team_link_ops);
2707         unregister_netdevice_notifier(&team_notifier_block);
2708 }
2709
2710 module_init(team_module_init);
2711 module_exit(team_module_exit);
2712
2713 MODULE_LICENSE("GPL v2");
2714 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
2715 MODULE_DESCRIPTION("Ethernet team device driver");
2716 MODULE_ALIAS_RTNL_LINK(DRV_NAME);