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/if_vlan.h> 22 #include <linux/if_arp.h> 23 #include <linux/socket.h> 24 #include <linux/etherdevice.h> 25 #include <linux/rtnetlink.h> 26 #include <net/rtnetlink.h> 27 #include <net/genetlink.h> 28 #include <net/netlink.h> 29 #include <linux/if_team.h> 30 31 #define DRV_NAME "team" 32 33 34 /********** 35 * Helpers 36 **********/ 37 38 #define team_port_exists(dev) (dev->priv_flags & IFF_TEAM_PORT) 39 40 static struct team_port *team_port_get_rcu(const struct net_device *dev) 41 { 42 struct team_port *port = rcu_dereference(dev->rx_handler_data); 43 44 return team_port_exists(dev) ? port : NULL; 45 } 46 47 static struct team_port *team_port_get_rtnl(const struct net_device *dev) 48 { 49 struct team_port *port = rtnl_dereference(dev->rx_handler_data); 50 51 return team_port_exists(dev) ? port : NULL; 52 } 53 54 /* 55 * Since the ability to change mac address for open port device is tested in 56 * team_port_add, this function can be called without control of return value 57 */ 58 static int __set_port_mac(struct net_device *port_dev, 59 const unsigned char *dev_addr) 60 { 61 struct sockaddr addr; 62 63 memcpy(addr.sa_data, dev_addr, ETH_ALEN); 64 addr.sa_family = ARPHRD_ETHER; 65 return dev_set_mac_address(port_dev, &addr); 66 } 67 68 static int team_port_set_orig_mac(struct team_port *port) 69 { 70 return __set_port_mac(port->dev, port->orig.dev_addr); 71 } 72 73 int team_port_set_team_mac(struct team_port *port) 74 { 75 return __set_port_mac(port->dev, port->team->dev->dev_addr); 76 } 77 EXPORT_SYMBOL(team_port_set_team_mac); 78 79 static void team_refresh_port_linkup(struct team_port *port) 80 { 81 port->linkup = port->user.linkup_enabled ? port->user.linkup : 82 port->state.linkup; 83 } 84 85 86 /******************* 87 * Options handling 88 *******************/ 89 90 struct team_option_inst { /* One for each option instance */ 91 struct list_head list; 92 struct list_head tmp_list; 93 struct team_option *option; 94 struct team_option_inst_info info; 95 bool changed; 96 bool removed; 97 }; 98 99 static struct team_option *__team_find_option(struct team *team, 100 const char *opt_name) 101 { 102 struct team_option *option; 103 104 list_for_each_entry(option, &team->option_list, list) { 105 if (strcmp(option->name, opt_name) == 0) 106 return option; 107 } 108 return NULL; 109 } 110 111 static void __team_option_inst_del(struct team_option_inst *opt_inst) 112 { 113 list_del(&opt_inst->list); 114 kfree(opt_inst); 115 } 116 117 static void __team_option_inst_del_option(struct team *team, 118 struct team_option *option) 119 { 120 struct team_option_inst *opt_inst, *tmp; 121 122 list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) { 123 if (opt_inst->option == option) 124 __team_option_inst_del(opt_inst); 125 } 126 } 127 128 static int __team_option_inst_add(struct team *team, struct team_option *option, 129 struct team_port *port) 130 { 131 struct team_option_inst *opt_inst; 132 unsigned int array_size; 133 unsigned int i; 134 int err; 135 136 array_size = option->array_size; 137 if (!array_size) 138 array_size = 1; /* No array but still need one instance */ 139 140 for (i = 0; i < array_size; i++) { 141 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL); 142 if (!opt_inst) 143 return -ENOMEM; 144 opt_inst->option = option; 145 opt_inst->info.port = port; 146 opt_inst->info.array_index = i; 147 opt_inst->changed = true; 148 opt_inst->removed = false; 149 list_add_tail(&opt_inst->list, &team->option_inst_list); 150 if (option->init) { 151 err = option->init(team, &opt_inst->info); 152 if (err) 153 return err; 154 } 155 156 } 157 return 0; 158 } 159 160 static int __team_option_inst_add_option(struct team *team, 161 struct team_option *option) 162 { 163 struct team_port *port; 164 int err; 165 166 if (!option->per_port) { 167 err = __team_option_inst_add(team, option, NULL); 168 if (err) 169 goto inst_del_option; 170 } 171 172 list_for_each_entry(port, &team->port_list, list) { 173 err = __team_option_inst_add(team, option, port); 174 if (err) 175 goto inst_del_option; 176 } 177 return 0; 178 179 inst_del_option: 180 __team_option_inst_del_option(team, option); 181 return err; 182 } 183 184 static void __team_option_inst_mark_removed_option(struct team *team, 185 struct team_option *option) 186 { 187 struct team_option_inst *opt_inst; 188 189 list_for_each_entry(opt_inst, &team->option_inst_list, list) { 190 if (opt_inst->option == option) { 191 opt_inst->changed = true; 192 opt_inst->removed = true; 193 } 194 } 195 } 196 197 static void __team_option_inst_del_port(struct team *team, 198 struct team_port *port) 199 { 200 struct team_option_inst *opt_inst, *tmp; 201 202 list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) { 203 if (opt_inst->option->per_port && 204 opt_inst->info.port == port) 205 __team_option_inst_del(opt_inst); 206 } 207 } 208 209 static int __team_option_inst_add_port(struct team *team, 210 struct team_port *port) 211 { 212 struct team_option *option; 213 int err; 214 215 list_for_each_entry(option, &team->option_list, list) { 216 if (!option->per_port) 217 continue; 218 err = __team_option_inst_add(team, option, port); 219 if (err) 220 goto inst_del_port; 221 } 222 return 0; 223 224 inst_del_port: 225 __team_option_inst_del_port(team, port); 226 return err; 227 } 228 229 static void __team_option_inst_mark_removed_port(struct team *team, 230 struct team_port *port) 231 { 232 struct team_option_inst *opt_inst; 233 234 list_for_each_entry(opt_inst, &team->option_inst_list, list) { 235 if (opt_inst->info.port == port) { 236 opt_inst->changed = true; 237 opt_inst->removed = true; 238 } 239 } 240 } 241 242 static int __team_options_register(struct team *team, 243 const struct team_option *option, 244 size_t option_count) 245 { 246 int i; 247 struct team_option **dst_opts; 248 int err; 249 250 dst_opts = kzalloc(sizeof(struct team_option *) * option_count, 251 GFP_KERNEL); 252 if (!dst_opts) 253 return -ENOMEM; 254 for (i = 0; i < option_count; i++, option++) { 255 if (__team_find_option(team, option->name)) { 256 err = -EEXIST; 257 goto alloc_rollback; 258 } 259 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL); 260 if (!dst_opts[i]) { 261 err = -ENOMEM; 262 goto alloc_rollback; 263 } 264 } 265 266 for (i = 0; i < option_count; i++) { 267 err = __team_option_inst_add_option(team, dst_opts[i]); 268 if (err) 269 goto inst_rollback; 270 list_add_tail(&dst_opts[i]->list, &team->option_list); 271 } 272 273 kfree(dst_opts); 274 return 0; 275 276 inst_rollback: 277 for (i--; i >= 0; i--) 278 __team_option_inst_del_option(team, dst_opts[i]); 279 280 i = option_count - 1; 281 alloc_rollback: 282 for (i--; i >= 0; i--) 283 kfree(dst_opts[i]); 284 285 kfree(dst_opts); 286 return err; 287 } 288 289 static void __team_options_mark_removed(struct team *team, 290 const struct team_option *option, 291 size_t option_count) 292 { 293 int i; 294 295 for (i = 0; i < option_count; i++, option++) { 296 struct team_option *del_opt; 297 298 del_opt = __team_find_option(team, option->name); 299 if (del_opt) 300 __team_option_inst_mark_removed_option(team, del_opt); 301 } 302 } 303 304 static void __team_options_unregister(struct team *team, 305 const struct team_option *option, 306 size_t option_count) 307 { 308 int i; 309 310 for (i = 0; i < option_count; i++, option++) { 311 struct team_option *del_opt; 312 313 del_opt = __team_find_option(team, option->name); 314 if (del_opt) { 315 __team_option_inst_del_option(team, del_opt); 316 list_del(&del_opt->list); 317 kfree(del_opt); 318 } 319 } 320 } 321 322 static void __team_options_change_check(struct team *team); 323 static void __team_option_inst_change(struct team *team, 324 struct team_option_inst *opt_inst); 325 326 int team_options_register(struct team *team, 327 const struct team_option *option, 328 size_t option_count) 329 { 330 int err; 331 332 err = __team_options_register(team, option, option_count); 333 if (err) 334 return err; 335 __team_options_change_check(team); 336 return 0; 337 } 338 EXPORT_SYMBOL(team_options_register); 339 340 void team_options_unregister(struct team *team, 341 const struct team_option *option, 342 size_t option_count) 343 { 344 __team_options_mark_removed(team, option, option_count); 345 __team_options_change_check(team); 346 __team_options_unregister(team, option, option_count); 347 } 348 EXPORT_SYMBOL(team_options_unregister); 349 350 static int team_option_port_add(struct team *team, struct team_port *port) 351 { 352 int err; 353 354 err = __team_option_inst_add_port(team, port); 355 if (err) 356 return err; 357 __team_options_change_check(team); 358 return 0; 359 } 360 361 static void team_option_port_del(struct team *team, struct team_port *port) 362 { 363 __team_option_inst_mark_removed_port(team, port); 364 __team_options_change_check(team); 365 __team_option_inst_del_port(team, port); 366 } 367 368 static int team_option_get(struct team *team, 369 struct team_option_inst *opt_inst, 370 struct team_gsetter_ctx *ctx) 371 { 372 if (!opt_inst->option->getter) 373 return -EOPNOTSUPP; 374 return opt_inst->option->getter(team, ctx); 375 } 376 377 static int team_option_set(struct team *team, 378 struct team_option_inst *opt_inst, 379 struct team_gsetter_ctx *ctx) 380 { 381 int err; 382 383 if (!opt_inst->option->setter) 384 return -EOPNOTSUPP; 385 err = opt_inst->option->setter(team, ctx); 386 if (err) 387 return err; 388 389 __team_option_inst_change(team, opt_inst); 390 return err; 391 } 392 393 void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info) 394 { 395 struct team_option_inst *opt_inst; 396 397 opt_inst = container_of(opt_inst_info, struct team_option_inst, info); 398 opt_inst->changed = true; 399 } 400 EXPORT_SYMBOL(team_option_inst_set_change); 401 402 void team_options_change_check(struct team *team) 403 { 404 __team_options_change_check(team); 405 } 406 EXPORT_SYMBOL(team_options_change_check); 407 408 409 /**************** 410 * Mode handling 411 ****************/ 412 413 static LIST_HEAD(mode_list); 414 static DEFINE_SPINLOCK(mode_list_lock); 415 416 struct team_mode_item { 417 struct list_head list; 418 const struct team_mode *mode; 419 }; 420 421 static struct team_mode_item *__find_mode(const char *kind) 422 { 423 struct team_mode_item *mitem; 424 425 list_for_each_entry(mitem, &mode_list, list) { 426 if (strcmp(mitem->mode->kind, kind) == 0) 427 return mitem; 428 } 429 return NULL; 430 } 431 432 static bool is_good_mode_name(const char *name) 433 { 434 while (*name != '\0') { 435 if (!isalpha(*name) && !isdigit(*name) && *name != '_') 436 return false; 437 name++; 438 } 439 return true; 440 } 441 442 int team_mode_register(const struct team_mode *mode) 443 { 444 int err = 0; 445 struct team_mode_item *mitem; 446 447 if (!is_good_mode_name(mode->kind) || 448 mode->priv_size > TEAM_MODE_PRIV_SIZE) 449 return -EINVAL; 450 451 mitem = kmalloc(sizeof(*mitem), GFP_KERNEL); 452 if (!mitem) 453 return -ENOMEM; 454 455 spin_lock(&mode_list_lock); 456 if (__find_mode(mode->kind)) { 457 err = -EEXIST; 458 kfree(mitem); 459 goto unlock; 460 } 461 mitem->mode = mode; 462 list_add_tail(&mitem->list, &mode_list); 463 unlock: 464 spin_unlock(&mode_list_lock); 465 return err; 466 } 467 EXPORT_SYMBOL(team_mode_register); 468 469 void team_mode_unregister(const struct team_mode *mode) 470 { 471 struct team_mode_item *mitem; 472 473 spin_lock(&mode_list_lock); 474 mitem = __find_mode(mode->kind); 475 if (mitem) { 476 list_del_init(&mitem->list); 477 kfree(mitem); 478 } 479 spin_unlock(&mode_list_lock); 480 } 481 EXPORT_SYMBOL(team_mode_unregister); 482 483 static const struct team_mode *team_mode_get(const char *kind) 484 { 485 struct team_mode_item *mitem; 486 const struct team_mode *mode = NULL; 487 488 spin_lock(&mode_list_lock); 489 mitem = __find_mode(kind); 490 if (!mitem) { 491 spin_unlock(&mode_list_lock); 492 request_module("team-mode-%s", kind); 493 spin_lock(&mode_list_lock); 494 mitem = __find_mode(kind); 495 } 496 if (mitem) { 497 mode = mitem->mode; 498 if (!try_module_get(mode->owner)) 499 mode = NULL; 500 } 501 502 spin_unlock(&mode_list_lock); 503 return mode; 504 } 505 506 static void team_mode_put(const struct team_mode *mode) 507 { 508 module_put(mode->owner); 509 } 510 511 static bool team_dummy_transmit(struct team *team, struct sk_buff *skb) 512 { 513 dev_kfree_skb_any(skb); 514 return false; 515 } 516 517 rx_handler_result_t team_dummy_receive(struct team *team, 518 struct team_port *port, 519 struct sk_buff *skb) 520 { 521 return RX_HANDLER_ANOTHER; 522 } 523 524 static const struct team_mode __team_no_mode = { 525 .kind = "*NOMODE*", 526 }; 527 528 static bool team_is_mode_set(struct team *team) 529 { 530 return team->mode != &__team_no_mode; 531 } 532 533 static void team_set_no_mode(struct team *team) 534 { 535 team->mode = &__team_no_mode; 536 } 537 538 static void team_adjust_ops(struct team *team) 539 { 540 /* 541 * To avoid checks in rx/tx skb paths, ensure here that non-null and 542 * correct ops are always set. 543 */ 544 545 if (list_empty(&team->port_list) || 546 !team_is_mode_set(team) || !team->mode->ops->transmit) 547 team->ops.transmit = team_dummy_transmit; 548 else 549 team->ops.transmit = team->mode->ops->transmit; 550 551 if (list_empty(&team->port_list) || 552 !team_is_mode_set(team) || !team->mode->ops->receive) 553 team->ops.receive = team_dummy_receive; 554 else 555 team->ops.receive = team->mode->ops->receive; 556 } 557 558 /* 559 * We can benefit from the fact that it's ensured no port is present 560 * at the time of mode change. Therefore no packets are in fly so there's no 561 * need to set mode operations in any special way. 562 */ 563 static int __team_change_mode(struct team *team, 564 const struct team_mode *new_mode) 565 { 566 /* Check if mode was previously set and do cleanup if so */ 567 if (team_is_mode_set(team)) { 568 void (*exit_op)(struct team *team) = team->ops.exit; 569 570 /* Clear ops area so no callback is called any longer */ 571 memset(&team->ops, 0, sizeof(struct team_mode_ops)); 572 team_adjust_ops(team); 573 574 if (exit_op) 575 exit_op(team); 576 team_mode_put(team->mode); 577 team_set_no_mode(team); 578 /* zero private data area */ 579 memset(&team->mode_priv, 0, 580 sizeof(struct team) - offsetof(struct team, mode_priv)); 581 } 582 583 if (!new_mode) 584 return 0; 585 586 if (new_mode->ops->init) { 587 int err; 588 589 err = new_mode->ops->init(team); 590 if (err) 591 return err; 592 } 593 594 team->mode = new_mode; 595 memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops)); 596 team_adjust_ops(team); 597 598 return 0; 599 } 600 601 static int team_change_mode(struct team *team, const char *kind) 602 { 603 const struct team_mode *new_mode; 604 struct net_device *dev = team->dev; 605 int err; 606 607 if (!list_empty(&team->port_list)) { 608 netdev_err(dev, "No ports can be present during mode change\n"); 609 return -EBUSY; 610 } 611 612 if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) { 613 netdev_err(dev, "Unable to change to the same mode the team is in\n"); 614 return -EINVAL; 615 } 616 617 new_mode = team_mode_get(kind); 618 if (!new_mode) { 619 netdev_err(dev, "Mode \"%s\" not found\n", kind); 620 return -EINVAL; 621 } 622 623 err = __team_change_mode(team, new_mode); 624 if (err) { 625 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind); 626 team_mode_put(new_mode); 627 return err; 628 } 629 630 netdev_info(dev, "Mode changed to \"%s\"\n", kind); 631 return 0; 632 } 633 634 635 /************************ 636 * Rx path frame handler 637 ************************/ 638 639 static bool team_port_enabled(struct team_port *port); 640 641 /* note: already called with rcu_read_lock */ 642 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb) 643 { 644 struct sk_buff *skb = *pskb; 645 struct team_port *port; 646 struct team *team; 647 rx_handler_result_t res; 648 649 skb = skb_share_check(skb, GFP_ATOMIC); 650 if (!skb) 651 return RX_HANDLER_CONSUMED; 652 653 *pskb = skb; 654 655 port = team_port_get_rcu(skb->dev); 656 team = port->team; 657 if (!team_port_enabled(port)) { 658 /* allow exact match delivery for disabled ports */ 659 res = RX_HANDLER_EXACT; 660 } else { 661 res = team->ops.receive(team, port, skb); 662 } 663 if (res == RX_HANDLER_ANOTHER) { 664 struct team_pcpu_stats *pcpu_stats; 665 666 pcpu_stats = this_cpu_ptr(team->pcpu_stats); 667 u64_stats_update_begin(&pcpu_stats->syncp); 668 pcpu_stats->rx_packets++; 669 pcpu_stats->rx_bytes += skb->len; 670 if (skb->pkt_type == PACKET_MULTICAST) 671 pcpu_stats->rx_multicast++; 672 u64_stats_update_end(&pcpu_stats->syncp); 673 674 skb->dev = team->dev; 675 } else { 676 this_cpu_inc(team->pcpu_stats->rx_dropped); 677 } 678 679 return res; 680 } 681 682 683 /**************** 684 * Port handling 685 ****************/ 686 687 static bool team_port_find(const struct team *team, 688 const struct team_port *port) 689 { 690 struct team_port *cur; 691 692 list_for_each_entry(cur, &team->port_list, list) 693 if (cur == port) 694 return true; 695 return false; 696 } 697 698 static bool team_port_enabled(struct team_port *port) 699 { 700 return port->index != -1; 701 } 702 703 /* 704 * Enable/disable port by adding to enabled port hashlist and setting 705 * port->index (Might be racy so reader could see incorrect ifindex when 706 * processing a flying packet, but that is not a problem). Write guarded 707 * by team->lock. 708 */ 709 static void team_port_enable(struct team *team, 710 struct team_port *port) 711 { 712 if (team_port_enabled(port)) 713 return; 714 port->index = team->en_port_count++; 715 hlist_add_head_rcu(&port->hlist, 716 team_port_index_hash(team, port->index)); 717 } 718 719 static void __reconstruct_port_hlist(struct team *team, int rm_index) 720 { 721 int i; 722 struct team_port *port; 723 724 for (i = rm_index + 1; i < team->en_port_count; i++) { 725 port = team_get_port_by_index(team, i); 726 hlist_del_rcu(&port->hlist); 727 port->index--; 728 hlist_add_head_rcu(&port->hlist, 729 team_port_index_hash(team, port->index)); 730 } 731 } 732 733 static void team_port_disable(struct team *team, 734 struct team_port *port) 735 { 736 int rm_index = port->index; 737 738 if (!team_port_enabled(port)) 739 return; 740 hlist_del_rcu(&port->hlist); 741 __reconstruct_port_hlist(team, rm_index); 742 team->en_port_count--; 743 port->index = -1; 744 } 745 746 #define TEAM_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \ 747 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \ 748 NETIF_F_HIGHDMA | NETIF_F_LRO) 749 750 static void __team_compute_features(struct team *team) 751 { 752 struct team_port *port; 753 u32 vlan_features = TEAM_VLAN_FEATURES; 754 unsigned short max_hard_header_len = ETH_HLEN; 755 756 list_for_each_entry(port, &team->port_list, list) { 757 vlan_features = netdev_increment_features(vlan_features, 758 port->dev->vlan_features, 759 TEAM_VLAN_FEATURES); 760 761 if (port->dev->hard_header_len > max_hard_header_len) 762 max_hard_header_len = port->dev->hard_header_len; 763 } 764 765 team->dev->vlan_features = vlan_features; 766 team->dev->hard_header_len = max_hard_header_len; 767 768 netdev_change_features(team->dev); 769 } 770 771 static void team_compute_features(struct team *team) 772 { 773 mutex_lock(&team->lock); 774 __team_compute_features(team); 775 mutex_unlock(&team->lock); 776 } 777 778 static int team_port_enter(struct team *team, struct team_port *port) 779 { 780 int err = 0; 781 782 dev_hold(team->dev); 783 port->dev->priv_flags |= IFF_TEAM_PORT; 784 if (team->ops.port_enter) { 785 err = team->ops.port_enter(team, port); 786 if (err) { 787 netdev_err(team->dev, "Device %s failed to enter team mode\n", 788 port->dev->name); 789 goto err_port_enter; 790 } 791 } 792 793 return 0; 794 795 err_port_enter: 796 port->dev->priv_flags &= ~IFF_TEAM_PORT; 797 dev_put(team->dev); 798 799 return err; 800 } 801 802 static void team_port_leave(struct team *team, struct team_port *port) 803 { 804 if (team->ops.port_leave) 805 team->ops.port_leave(team, port); 806 port->dev->priv_flags &= ~IFF_TEAM_PORT; 807 dev_put(team->dev); 808 } 809 810 static void __team_port_change_check(struct team_port *port, bool linkup); 811 812 static int team_port_add(struct team *team, struct net_device *port_dev) 813 { 814 struct net_device *dev = team->dev; 815 struct team_port *port; 816 char *portname = port_dev->name; 817 int err; 818 819 if (port_dev->flags & IFF_LOOPBACK || 820 port_dev->type != ARPHRD_ETHER) { 821 netdev_err(dev, "Device %s is of an unsupported type\n", 822 portname); 823 return -EINVAL; 824 } 825 826 if (team_port_exists(port_dev)) { 827 netdev_err(dev, "Device %s is already a port " 828 "of a team device\n", portname); 829 return -EBUSY; 830 } 831 832 if (port_dev->flags & IFF_UP) { 833 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n", 834 portname); 835 return -EBUSY; 836 } 837 838 port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size, 839 GFP_KERNEL); 840 if (!port) 841 return -ENOMEM; 842 843 port->dev = port_dev; 844 port->team = team; 845 846 port->orig.mtu = port_dev->mtu; 847 err = dev_set_mtu(port_dev, dev->mtu); 848 if (err) { 849 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err); 850 goto err_set_mtu; 851 } 852 853 memcpy(port->orig.dev_addr, port_dev->dev_addr, ETH_ALEN); 854 855 err = team_port_enter(team, port); 856 if (err) { 857 netdev_err(dev, "Device %s failed to enter team mode\n", 858 portname); 859 goto err_port_enter; 860 } 861 862 err = dev_open(port_dev); 863 if (err) { 864 netdev_dbg(dev, "Device %s opening failed\n", 865 portname); 866 goto err_dev_open; 867 } 868 869 err = vlan_vids_add_by_dev(port_dev, dev); 870 if (err) { 871 netdev_err(dev, "Failed to add vlan ids to device %s\n", 872 portname); 873 goto err_vids_add; 874 } 875 876 err = netdev_set_master(port_dev, dev); 877 if (err) { 878 netdev_err(dev, "Device %s failed to set master\n", portname); 879 goto err_set_master; 880 } 881 882 err = netdev_rx_handler_register(port_dev, team_handle_frame, 883 port); 884 if (err) { 885 netdev_err(dev, "Device %s failed to register rx_handler\n", 886 portname); 887 goto err_handler_register; 888 } 889 890 err = team_option_port_add(team, port); 891 if (err) { 892 netdev_err(dev, "Device %s failed to add per-port options\n", 893 portname); 894 goto err_option_port_add; 895 } 896 897 port->index = -1; 898 team_port_enable(team, port); 899 list_add_tail_rcu(&port->list, &team->port_list); 900 team_adjust_ops(team); 901 __team_compute_features(team); 902 __team_port_change_check(port, !!netif_carrier_ok(port_dev)); 903 904 netdev_info(dev, "Port device %s added\n", portname); 905 906 return 0; 907 908 err_option_port_add: 909 netdev_rx_handler_unregister(port_dev); 910 911 err_handler_register: 912 netdev_set_master(port_dev, NULL); 913 914 err_set_master: 915 vlan_vids_del_by_dev(port_dev, dev); 916 917 err_vids_add: 918 dev_close(port_dev); 919 920 err_dev_open: 921 team_port_leave(team, port); 922 team_port_set_orig_mac(port); 923 924 err_port_enter: 925 dev_set_mtu(port_dev, port->orig.mtu); 926 927 err_set_mtu: 928 kfree(port); 929 930 return err; 931 } 932 933 static int team_port_del(struct team *team, struct net_device *port_dev) 934 { 935 struct net_device *dev = team->dev; 936 struct team_port *port; 937 char *portname = port_dev->name; 938 939 port = team_port_get_rtnl(port_dev); 940 if (!port || !team_port_find(team, port)) { 941 netdev_err(dev, "Device %s does not act as a port of this team\n", 942 portname); 943 return -ENOENT; 944 } 945 946 port->removed = true; 947 __team_port_change_check(port, false); 948 team_port_disable(team, port); 949 list_del_rcu(&port->list); 950 team_adjust_ops(team); 951 team_option_port_del(team, port); 952 netdev_rx_handler_unregister(port_dev); 953 netdev_set_master(port_dev, NULL); 954 vlan_vids_del_by_dev(port_dev, dev); 955 dev_close(port_dev); 956 team_port_leave(team, port); 957 team_port_set_orig_mac(port); 958 dev_set_mtu(port_dev, port->orig.mtu); 959 synchronize_rcu(); 960 kfree(port); 961 netdev_info(dev, "Port device %s removed\n", portname); 962 __team_compute_features(team); 963 964 return 0; 965 } 966 967 968 /***************** 969 * Net device ops 970 *****************/ 971 972 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx) 973 { 974 ctx->data.str_val = team->mode->kind; 975 return 0; 976 } 977 978 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx) 979 { 980 return team_change_mode(team, ctx->data.str_val); 981 } 982 983 static int team_port_en_option_get(struct team *team, 984 struct team_gsetter_ctx *ctx) 985 { 986 struct team_port *port = ctx->info->port; 987 988 ctx->data.bool_val = team_port_enabled(port); 989 return 0; 990 } 991 992 static int team_port_en_option_set(struct team *team, 993 struct team_gsetter_ctx *ctx) 994 { 995 struct team_port *port = ctx->info->port; 996 997 if (ctx->data.bool_val) 998 team_port_enable(team, port); 999 else 1000 team_port_disable(team, port); 1001 return 0; 1002 } 1003 1004 static int team_user_linkup_option_get(struct team *team, 1005 struct team_gsetter_ctx *ctx) 1006 { 1007 struct team_port *port = ctx->info->port; 1008 1009 ctx->data.bool_val = port->user.linkup; 1010 return 0; 1011 } 1012 1013 static int team_user_linkup_option_set(struct team *team, 1014 struct team_gsetter_ctx *ctx) 1015 { 1016 struct team_port *port = ctx->info->port; 1017 1018 port->user.linkup = ctx->data.bool_val; 1019 team_refresh_port_linkup(port); 1020 return 0; 1021 } 1022 1023 static int team_user_linkup_en_option_get(struct team *team, 1024 struct team_gsetter_ctx *ctx) 1025 { 1026 struct team_port *port = ctx->info->port; 1027 1028 ctx->data.bool_val = port->user.linkup_enabled; 1029 return 0; 1030 } 1031 1032 static int team_user_linkup_en_option_set(struct team *team, 1033 struct team_gsetter_ctx *ctx) 1034 { 1035 struct team_port *port = ctx->info->port; 1036 1037 port->user.linkup_enabled = ctx->data.bool_val; 1038 team_refresh_port_linkup(port); 1039 return 0; 1040 } 1041 1042 static const struct team_option team_options[] = { 1043 { 1044 .name = "mode", 1045 .type = TEAM_OPTION_TYPE_STRING, 1046 .getter = team_mode_option_get, 1047 .setter = team_mode_option_set, 1048 }, 1049 { 1050 .name = "enabled", 1051 .type = TEAM_OPTION_TYPE_BOOL, 1052 .per_port = true, 1053 .getter = team_port_en_option_get, 1054 .setter = team_port_en_option_set, 1055 }, 1056 { 1057 .name = "user_linkup", 1058 .type = TEAM_OPTION_TYPE_BOOL, 1059 .per_port = true, 1060 .getter = team_user_linkup_option_get, 1061 .setter = team_user_linkup_option_set, 1062 }, 1063 { 1064 .name = "user_linkup_enabled", 1065 .type = TEAM_OPTION_TYPE_BOOL, 1066 .per_port = true, 1067 .getter = team_user_linkup_en_option_get, 1068 .setter = team_user_linkup_en_option_set, 1069 }, 1070 }; 1071 1072 static int team_init(struct net_device *dev) 1073 { 1074 struct team *team = netdev_priv(dev); 1075 int i; 1076 int err; 1077 1078 team->dev = dev; 1079 mutex_init(&team->lock); 1080 team_set_no_mode(team); 1081 1082 team->pcpu_stats = alloc_percpu(struct team_pcpu_stats); 1083 if (!team->pcpu_stats) 1084 return -ENOMEM; 1085 1086 for (i = 0; i < TEAM_PORT_HASHENTRIES; i++) 1087 INIT_HLIST_HEAD(&team->en_port_hlist[i]); 1088 INIT_LIST_HEAD(&team->port_list); 1089 1090 team_adjust_ops(team); 1091 1092 INIT_LIST_HEAD(&team->option_list); 1093 INIT_LIST_HEAD(&team->option_inst_list); 1094 err = team_options_register(team, team_options, ARRAY_SIZE(team_options)); 1095 if (err) 1096 goto err_options_register; 1097 netif_carrier_off(dev); 1098 1099 return 0; 1100 1101 err_options_register: 1102 free_percpu(team->pcpu_stats); 1103 1104 return err; 1105 } 1106 1107 static void team_uninit(struct net_device *dev) 1108 { 1109 struct team *team = netdev_priv(dev); 1110 struct team_port *port; 1111 struct team_port *tmp; 1112 1113 mutex_lock(&team->lock); 1114 list_for_each_entry_safe(port, tmp, &team->port_list, list) 1115 team_port_del(team, port->dev); 1116 1117 __team_change_mode(team, NULL); /* cleanup */ 1118 __team_options_unregister(team, team_options, ARRAY_SIZE(team_options)); 1119 mutex_unlock(&team->lock); 1120 } 1121 1122 static void team_destructor(struct net_device *dev) 1123 { 1124 struct team *team = netdev_priv(dev); 1125 1126 free_percpu(team->pcpu_stats); 1127 free_netdev(dev); 1128 } 1129 1130 static int team_open(struct net_device *dev) 1131 { 1132 netif_carrier_on(dev); 1133 return 0; 1134 } 1135 1136 static int team_close(struct net_device *dev) 1137 { 1138 netif_carrier_off(dev); 1139 return 0; 1140 } 1141 1142 /* 1143 * note: already called with rcu_read_lock 1144 */ 1145 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev) 1146 { 1147 struct team *team = netdev_priv(dev); 1148 bool tx_success = false; 1149 unsigned int len = skb->len; 1150 1151 tx_success = team->ops.transmit(team, skb); 1152 if (tx_success) { 1153 struct team_pcpu_stats *pcpu_stats; 1154 1155 pcpu_stats = this_cpu_ptr(team->pcpu_stats); 1156 u64_stats_update_begin(&pcpu_stats->syncp); 1157 pcpu_stats->tx_packets++; 1158 pcpu_stats->tx_bytes += len; 1159 u64_stats_update_end(&pcpu_stats->syncp); 1160 } else { 1161 this_cpu_inc(team->pcpu_stats->tx_dropped); 1162 } 1163 1164 return NETDEV_TX_OK; 1165 } 1166 1167 static void team_change_rx_flags(struct net_device *dev, int change) 1168 { 1169 struct team *team = netdev_priv(dev); 1170 struct team_port *port; 1171 int inc; 1172 1173 rcu_read_lock(); 1174 list_for_each_entry_rcu(port, &team->port_list, list) { 1175 if (change & IFF_PROMISC) { 1176 inc = dev->flags & IFF_PROMISC ? 1 : -1; 1177 dev_set_promiscuity(port->dev, inc); 1178 } 1179 if (change & IFF_ALLMULTI) { 1180 inc = dev->flags & IFF_ALLMULTI ? 1 : -1; 1181 dev_set_allmulti(port->dev, inc); 1182 } 1183 } 1184 rcu_read_unlock(); 1185 } 1186 1187 static void team_set_rx_mode(struct net_device *dev) 1188 { 1189 struct team *team = netdev_priv(dev); 1190 struct team_port *port; 1191 1192 rcu_read_lock(); 1193 list_for_each_entry_rcu(port, &team->port_list, list) { 1194 dev_uc_sync(port->dev, dev); 1195 dev_mc_sync(port->dev, dev); 1196 } 1197 rcu_read_unlock(); 1198 } 1199 1200 static int team_set_mac_address(struct net_device *dev, void *p) 1201 { 1202 struct team *team = netdev_priv(dev); 1203 struct team_port *port; 1204 struct sockaddr *addr = p; 1205 1206 dev->addr_assign_type &= ~NET_ADDR_RANDOM; 1207 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); 1208 rcu_read_lock(); 1209 list_for_each_entry_rcu(port, &team->port_list, list) 1210 if (team->ops.port_change_mac) 1211 team->ops.port_change_mac(team, port); 1212 rcu_read_unlock(); 1213 return 0; 1214 } 1215 1216 static int team_change_mtu(struct net_device *dev, int new_mtu) 1217 { 1218 struct team *team = netdev_priv(dev); 1219 struct team_port *port; 1220 int err; 1221 1222 /* 1223 * Alhough this is reader, it's guarded by team lock. It's not possible 1224 * to traverse list in reverse under rcu_read_lock 1225 */ 1226 mutex_lock(&team->lock); 1227 list_for_each_entry(port, &team->port_list, list) { 1228 err = dev_set_mtu(port->dev, new_mtu); 1229 if (err) { 1230 netdev_err(dev, "Device %s failed to change mtu", 1231 port->dev->name); 1232 goto unwind; 1233 } 1234 } 1235 mutex_unlock(&team->lock); 1236 1237 dev->mtu = new_mtu; 1238 1239 return 0; 1240 1241 unwind: 1242 list_for_each_entry_continue_reverse(port, &team->port_list, list) 1243 dev_set_mtu(port->dev, dev->mtu); 1244 mutex_unlock(&team->lock); 1245 1246 return err; 1247 } 1248 1249 static struct rtnl_link_stats64 * 1250 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) 1251 { 1252 struct team *team = netdev_priv(dev); 1253 struct team_pcpu_stats *p; 1254 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes; 1255 u32 rx_dropped = 0, tx_dropped = 0; 1256 unsigned int start; 1257 int i; 1258 1259 for_each_possible_cpu(i) { 1260 p = per_cpu_ptr(team->pcpu_stats, i); 1261 do { 1262 start = u64_stats_fetch_begin_bh(&p->syncp); 1263 rx_packets = p->rx_packets; 1264 rx_bytes = p->rx_bytes; 1265 rx_multicast = p->rx_multicast; 1266 tx_packets = p->tx_packets; 1267 tx_bytes = p->tx_bytes; 1268 } while (u64_stats_fetch_retry_bh(&p->syncp, start)); 1269 1270 stats->rx_packets += rx_packets; 1271 stats->rx_bytes += rx_bytes; 1272 stats->multicast += rx_multicast; 1273 stats->tx_packets += tx_packets; 1274 stats->tx_bytes += tx_bytes; 1275 /* 1276 * rx_dropped & tx_dropped are u32, updated 1277 * without syncp protection. 1278 */ 1279 rx_dropped += p->rx_dropped; 1280 tx_dropped += p->tx_dropped; 1281 } 1282 stats->rx_dropped = rx_dropped; 1283 stats->tx_dropped = tx_dropped; 1284 return stats; 1285 } 1286 1287 static int team_vlan_rx_add_vid(struct net_device *dev, uint16_t vid) 1288 { 1289 struct team *team = netdev_priv(dev); 1290 struct team_port *port; 1291 int err; 1292 1293 /* 1294 * Alhough this is reader, it's guarded by team lock. It's not possible 1295 * to traverse list in reverse under rcu_read_lock 1296 */ 1297 mutex_lock(&team->lock); 1298 list_for_each_entry(port, &team->port_list, list) { 1299 err = vlan_vid_add(port->dev, vid); 1300 if (err) 1301 goto unwind; 1302 } 1303 mutex_unlock(&team->lock); 1304 1305 return 0; 1306 1307 unwind: 1308 list_for_each_entry_continue_reverse(port, &team->port_list, list) 1309 vlan_vid_del(port->dev, vid); 1310 mutex_unlock(&team->lock); 1311 1312 return err; 1313 } 1314 1315 static int team_vlan_rx_kill_vid(struct net_device *dev, uint16_t vid) 1316 { 1317 struct team *team = netdev_priv(dev); 1318 struct team_port *port; 1319 1320 rcu_read_lock(); 1321 list_for_each_entry_rcu(port, &team->port_list, list) 1322 vlan_vid_del(port->dev, vid); 1323 rcu_read_unlock(); 1324 1325 return 0; 1326 } 1327 1328 static int team_add_slave(struct net_device *dev, struct net_device *port_dev) 1329 { 1330 struct team *team = netdev_priv(dev); 1331 int err; 1332 1333 mutex_lock(&team->lock); 1334 err = team_port_add(team, port_dev); 1335 mutex_unlock(&team->lock); 1336 return err; 1337 } 1338 1339 static int team_del_slave(struct net_device *dev, struct net_device *port_dev) 1340 { 1341 struct team *team = netdev_priv(dev); 1342 int err; 1343 1344 mutex_lock(&team->lock); 1345 err = team_port_del(team, port_dev); 1346 mutex_unlock(&team->lock); 1347 return err; 1348 } 1349 1350 static netdev_features_t team_fix_features(struct net_device *dev, 1351 netdev_features_t features) 1352 { 1353 struct team_port *port; 1354 struct team *team = netdev_priv(dev); 1355 netdev_features_t mask; 1356 1357 mask = features; 1358 features &= ~NETIF_F_ONE_FOR_ALL; 1359 features |= NETIF_F_ALL_FOR_ALL; 1360 1361 rcu_read_lock(); 1362 list_for_each_entry_rcu(port, &team->port_list, list) { 1363 features = netdev_increment_features(features, 1364 port->dev->features, 1365 mask); 1366 } 1367 rcu_read_unlock(); 1368 return features; 1369 } 1370 1371 static const struct net_device_ops team_netdev_ops = { 1372 .ndo_init = team_init, 1373 .ndo_uninit = team_uninit, 1374 .ndo_open = team_open, 1375 .ndo_stop = team_close, 1376 .ndo_start_xmit = team_xmit, 1377 .ndo_change_rx_flags = team_change_rx_flags, 1378 .ndo_set_rx_mode = team_set_rx_mode, 1379 .ndo_set_mac_address = team_set_mac_address, 1380 .ndo_change_mtu = team_change_mtu, 1381 .ndo_get_stats64 = team_get_stats64, 1382 .ndo_vlan_rx_add_vid = team_vlan_rx_add_vid, 1383 .ndo_vlan_rx_kill_vid = team_vlan_rx_kill_vid, 1384 .ndo_add_slave = team_add_slave, 1385 .ndo_del_slave = team_del_slave, 1386 .ndo_fix_features = team_fix_features, 1387 }; 1388 1389 1390 /*********************** 1391 * rt netlink interface 1392 ***********************/ 1393 1394 static void team_setup(struct net_device *dev) 1395 { 1396 ether_setup(dev); 1397 1398 dev->netdev_ops = &team_netdev_ops; 1399 dev->destructor = team_destructor; 1400 dev->tx_queue_len = 0; 1401 dev->flags |= IFF_MULTICAST; 1402 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); 1403 1404 /* 1405 * Indicate we support unicast address filtering. That way core won't 1406 * bring us to promisc mode in case a unicast addr is added. 1407 * Let this up to underlay drivers. 1408 */ 1409 dev->priv_flags |= IFF_UNICAST_FLT; 1410 1411 dev->features |= NETIF_F_LLTX; 1412 dev->features |= NETIF_F_GRO; 1413 dev->hw_features = NETIF_F_HW_VLAN_TX | 1414 NETIF_F_HW_VLAN_RX | 1415 NETIF_F_HW_VLAN_FILTER; 1416 1417 dev->features |= dev->hw_features; 1418 } 1419 1420 static int team_newlink(struct net *src_net, struct net_device *dev, 1421 struct nlattr *tb[], struct nlattr *data[]) 1422 { 1423 int err; 1424 1425 if (tb[IFLA_ADDRESS] == NULL) 1426 eth_hw_addr_random(dev); 1427 1428 err = register_netdevice(dev); 1429 if (err) 1430 return err; 1431 1432 return 0; 1433 } 1434 1435 static int team_validate(struct nlattr *tb[], struct nlattr *data[]) 1436 { 1437 if (tb[IFLA_ADDRESS]) { 1438 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) 1439 return -EINVAL; 1440 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) 1441 return -EADDRNOTAVAIL; 1442 } 1443 return 0; 1444 } 1445 1446 static struct rtnl_link_ops team_link_ops __read_mostly = { 1447 .kind = DRV_NAME, 1448 .priv_size = sizeof(struct team), 1449 .setup = team_setup, 1450 .newlink = team_newlink, 1451 .validate = team_validate, 1452 }; 1453 1454 1455 /*********************************** 1456 * Generic netlink custom interface 1457 ***********************************/ 1458 1459 static struct genl_family team_nl_family = { 1460 .id = GENL_ID_GENERATE, 1461 .name = TEAM_GENL_NAME, 1462 .version = TEAM_GENL_VERSION, 1463 .maxattr = TEAM_ATTR_MAX, 1464 .netnsok = true, 1465 }; 1466 1467 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = { 1468 [TEAM_ATTR_UNSPEC] = { .type = NLA_UNSPEC, }, 1469 [TEAM_ATTR_TEAM_IFINDEX] = { .type = NLA_U32 }, 1470 [TEAM_ATTR_LIST_OPTION] = { .type = NLA_NESTED }, 1471 [TEAM_ATTR_LIST_PORT] = { .type = NLA_NESTED }, 1472 }; 1473 1474 static const struct nla_policy 1475 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = { 1476 [TEAM_ATTR_OPTION_UNSPEC] = { .type = NLA_UNSPEC, }, 1477 [TEAM_ATTR_OPTION_NAME] = { 1478 .type = NLA_STRING, 1479 .len = TEAM_STRING_MAX_LEN, 1480 }, 1481 [TEAM_ATTR_OPTION_CHANGED] = { .type = NLA_FLAG }, 1482 [TEAM_ATTR_OPTION_TYPE] = { .type = NLA_U8 }, 1483 [TEAM_ATTR_OPTION_DATA] = { .type = NLA_BINARY }, 1484 }; 1485 1486 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info) 1487 { 1488 struct sk_buff *msg; 1489 void *hdr; 1490 int err; 1491 1492 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); 1493 if (!msg) 1494 return -ENOMEM; 1495 1496 hdr = genlmsg_put(msg, info->snd_pid, info->snd_seq, 1497 &team_nl_family, 0, TEAM_CMD_NOOP); 1498 if (IS_ERR(hdr)) { 1499 err = PTR_ERR(hdr); 1500 goto err_msg_put; 1501 } 1502 1503 genlmsg_end(msg, hdr); 1504 1505 return genlmsg_unicast(genl_info_net(info), msg, info->snd_pid); 1506 1507 err_msg_put: 1508 nlmsg_free(msg); 1509 1510 return err; 1511 } 1512 1513 /* 1514 * Netlink cmd functions should be locked by following two functions. 1515 * Since dev gets held here, that ensures dev won't disappear in between. 1516 */ 1517 static struct team *team_nl_team_get(struct genl_info *info) 1518 { 1519 struct net *net = genl_info_net(info); 1520 int ifindex; 1521 struct net_device *dev; 1522 struct team *team; 1523 1524 if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX]) 1525 return NULL; 1526 1527 ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]); 1528 dev = dev_get_by_index(net, ifindex); 1529 if (!dev || dev->netdev_ops != &team_netdev_ops) { 1530 if (dev) 1531 dev_put(dev); 1532 return NULL; 1533 } 1534 1535 team = netdev_priv(dev); 1536 mutex_lock(&team->lock); 1537 return team; 1538 } 1539 1540 static void team_nl_team_put(struct team *team) 1541 { 1542 mutex_unlock(&team->lock); 1543 dev_put(team->dev); 1544 } 1545 1546 static int team_nl_send_generic(struct genl_info *info, struct team *team, 1547 int (*fill_func)(struct sk_buff *skb, 1548 struct genl_info *info, 1549 int flags, struct team *team)) 1550 { 1551 struct sk_buff *skb; 1552 int err; 1553 1554 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); 1555 if (!skb) 1556 return -ENOMEM; 1557 1558 err = fill_func(skb, info, NLM_F_ACK, team); 1559 if (err < 0) 1560 goto err_fill; 1561 1562 err = genlmsg_unicast(genl_info_net(info), skb, info->snd_pid); 1563 return err; 1564 1565 err_fill: 1566 nlmsg_free(skb); 1567 return err; 1568 } 1569 1570 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team, 1571 struct team_option_inst *opt_inst) 1572 { 1573 struct nlattr *option_item; 1574 struct team_option *option = opt_inst->option; 1575 struct team_option_inst_info *opt_inst_info; 1576 struct team_gsetter_ctx ctx; 1577 int err; 1578 1579 option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION); 1580 if (!option_item) 1581 goto nla_put_failure; 1582 if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name)) 1583 goto nla_put_failure; 1584 if (opt_inst->changed) { 1585 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED)) 1586 goto nla_put_failure; 1587 opt_inst->changed = false; 1588 } 1589 if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED)) 1590 goto nla_put_failure; 1591 1592 opt_inst_info = &opt_inst->info; 1593 if (opt_inst_info->port && 1594 nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX, 1595 opt_inst_info->port->dev->ifindex)) 1596 goto nla_put_failure; 1597 if (opt_inst->option->array_size && 1598 nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX, 1599 opt_inst_info->array_index)) 1600 goto nla_put_failure; 1601 ctx.info = opt_inst_info; 1602 1603 switch (option->type) { 1604 case TEAM_OPTION_TYPE_U32: 1605 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32)) 1606 goto nla_put_failure; 1607 err = team_option_get(team, opt_inst, &ctx); 1608 if (err) 1609 goto errout; 1610 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val)) 1611 goto nla_put_failure; 1612 break; 1613 case TEAM_OPTION_TYPE_STRING: 1614 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING)) 1615 goto nla_put_failure; 1616 err = team_option_get(team, opt_inst, &ctx); 1617 if (err) 1618 goto errout; 1619 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA, 1620 ctx.data.str_val)) 1621 goto nla_put_failure; 1622 break; 1623 case TEAM_OPTION_TYPE_BINARY: 1624 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY)) 1625 goto nla_put_failure; 1626 err = team_option_get(team, opt_inst, &ctx); 1627 if (err) 1628 goto errout; 1629 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len, 1630 ctx.data.bin_val.ptr)) 1631 goto nla_put_failure; 1632 break; 1633 case TEAM_OPTION_TYPE_BOOL: 1634 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG)) 1635 goto nla_put_failure; 1636 err = team_option_get(team, opt_inst, &ctx); 1637 if (err) 1638 goto errout; 1639 if (ctx.data.bool_val && 1640 nla_put_flag(skb, TEAM_ATTR_OPTION_DATA)) 1641 goto nla_put_failure; 1642 break; 1643 default: 1644 BUG(); 1645 } 1646 nla_nest_end(skb, option_item); 1647 return 0; 1648 1649 nla_put_failure: 1650 err = -EMSGSIZE; 1651 errout: 1652 return err; 1653 } 1654 1655 static int team_nl_fill_options_get(struct sk_buff *skb, 1656 u32 pid, u32 seq, int flags, 1657 struct team *team, 1658 struct list_head *sel_opt_inst_list) 1659 { 1660 struct nlattr *option_list; 1661 void *hdr; 1662 struct team_option_inst *opt_inst; 1663 int err; 1664 1665 hdr = genlmsg_put(skb, pid, seq, &team_nl_family, flags, 1666 TEAM_CMD_OPTIONS_GET); 1667 if (IS_ERR(hdr)) 1668 return PTR_ERR(hdr); 1669 1670 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex)) 1671 goto nla_put_failure; 1672 option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION); 1673 if (!option_list) 1674 goto nla_put_failure; 1675 1676 list_for_each_entry(opt_inst, sel_opt_inst_list, tmp_list) { 1677 err = team_nl_fill_one_option_get(skb, team, opt_inst); 1678 if (err) 1679 goto errout; 1680 } 1681 1682 nla_nest_end(skb, option_list); 1683 return genlmsg_end(skb, hdr); 1684 1685 nla_put_failure: 1686 err = -EMSGSIZE; 1687 errout: 1688 genlmsg_cancel(skb, hdr); 1689 return err; 1690 } 1691 1692 static int team_nl_fill_options_get_all(struct sk_buff *skb, 1693 struct genl_info *info, int flags, 1694 struct team *team) 1695 { 1696 struct team_option_inst *opt_inst; 1697 LIST_HEAD(sel_opt_inst_list); 1698 1699 list_for_each_entry(opt_inst, &team->option_inst_list, list) 1700 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list); 1701 return team_nl_fill_options_get(skb, info->snd_pid, 1702 info->snd_seq, NLM_F_ACK, 1703 team, &sel_opt_inst_list); 1704 } 1705 1706 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info) 1707 { 1708 struct team *team; 1709 int err; 1710 1711 team = team_nl_team_get(info); 1712 if (!team) 1713 return -EINVAL; 1714 1715 err = team_nl_send_generic(info, team, team_nl_fill_options_get_all); 1716 1717 team_nl_team_put(team); 1718 1719 return err; 1720 } 1721 1722 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info) 1723 { 1724 struct team *team; 1725 int err = 0; 1726 int i; 1727 struct nlattr *nl_option; 1728 1729 team = team_nl_team_get(info); 1730 if (!team) 1731 return -EINVAL; 1732 1733 err = -EINVAL; 1734 if (!info->attrs[TEAM_ATTR_LIST_OPTION]) { 1735 err = -EINVAL; 1736 goto team_put; 1737 } 1738 1739 nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) { 1740 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1]; 1741 struct nlattr *attr; 1742 struct nlattr *attr_data; 1743 enum team_option_type opt_type; 1744 int opt_port_ifindex = 0; /* != 0 for per-port options */ 1745 u32 opt_array_index = 0; 1746 bool opt_is_array = false; 1747 struct team_option_inst *opt_inst; 1748 char *opt_name; 1749 bool opt_found = false; 1750 1751 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) { 1752 err = -EINVAL; 1753 goto team_put; 1754 } 1755 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX, 1756 nl_option, team_nl_option_policy); 1757 if (err) 1758 goto team_put; 1759 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] || 1760 !opt_attrs[TEAM_ATTR_OPTION_TYPE]) { 1761 err = -EINVAL; 1762 goto team_put; 1763 } 1764 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) { 1765 case NLA_U32: 1766 opt_type = TEAM_OPTION_TYPE_U32; 1767 break; 1768 case NLA_STRING: 1769 opt_type = TEAM_OPTION_TYPE_STRING; 1770 break; 1771 case NLA_BINARY: 1772 opt_type = TEAM_OPTION_TYPE_BINARY; 1773 break; 1774 case NLA_FLAG: 1775 opt_type = TEAM_OPTION_TYPE_BOOL; 1776 break; 1777 default: 1778 goto team_put; 1779 } 1780 1781 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA]; 1782 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) { 1783 err = -EINVAL; 1784 goto team_put; 1785 } 1786 1787 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]); 1788 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX]; 1789 if (attr) 1790 opt_port_ifindex = nla_get_u32(attr); 1791 1792 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX]; 1793 if (attr) { 1794 opt_is_array = true; 1795 opt_array_index = nla_get_u32(attr); 1796 } 1797 1798 list_for_each_entry(opt_inst, &team->option_inst_list, list) { 1799 struct team_option *option = opt_inst->option; 1800 struct team_gsetter_ctx ctx; 1801 struct team_option_inst_info *opt_inst_info; 1802 int tmp_ifindex; 1803 1804 opt_inst_info = &opt_inst->info; 1805 tmp_ifindex = opt_inst_info->port ? 1806 opt_inst_info->port->dev->ifindex : 0; 1807 if (option->type != opt_type || 1808 strcmp(option->name, opt_name) || 1809 tmp_ifindex != opt_port_ifindex || 1810 (option->array_size && !opt_is_array) || 1811 opt_inst_info->array_index != opt_array_index) 1812 continue; 1813 opt_found = true; 1814 ctx.info = opt_inst_info; 1815 switch (opt_type) { 1816 case TEAM_OPTION_TYPE_U32: 1817 ctx.data.u32_val = nla_get_u32(attr_data); 1818 break; 1819 case TEAM_OPTION_TYPE_STRING: 1820 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) { 1821 err = -EINVAL; 1822 goto team_put; 1823 } 1824 ctx.data.str_val = nla_data(attr_data); 1825 break; 1826 case TEAM_OPTION_TYPE_BINARY: 1827 ctx.data.bin_val.len = nla_len(attr_data); 1828 ctx.data.bin_val.ptr = nla_data(attr_data); 1829 break; 1830 case TEAM_OPTION_TYPE_BOOL: 1831 ctx.data.bool_val = attr_data ? true : false; 1832 break; 1833 default: 1834 BUG(); 1835 } 1836 err = team_option_set(team, opt_inst, &ctx); 1837 if (err) 1838 goto team_put; 1839 } 1840 if (!opt_found) { 1841 err = -ENOENT; 1842 goto team_put; 1843 } 1844 } 1845 1846 team_put: 1847 team_nl_team_put(team); 1848 1849 return err; 1850 } 1851 1852 static int team_nl_fill_port_list_get(struct sk_buff *skb, 1853 u32 pid, u32 seq, int flags, 1854 struct team *team, 1855 bool fillall) 1856 { 1857 struct nlattr *port_list; 1858 void *hdr; 1859 struct team_port *port; 1860 1861 hdr = genlmsg_put(skb, pid, seq, &team_nl_family, flags, 1862 TEAM_CMD_PORT_LIST_GET); 1863 if (IS_ERR(hdr)) 1864 return PTR_ERR(hdr); 1865 1866 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex)) 1867 goto nla_put_failure; 1868 port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT); 1869 if (!port_list) 1870 goto nla_put_failure; 1871 1872 list_for_each_entry(port, &team->port_list, list) { 1873 struct nlattr *port_item; 1874 1875 /* Include only changed ports if fill all mode is not on */ 1876 if (!fillall && !port->changed) 1877 continue; 1878 port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT); 1879 if (!port_item) 1880 goto nla_put_failure; 1881 if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex)) 1882 goto nla_put_failure; 1883 if (port->changed) { 1884 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED)) 1885 goto nla_put_failure; 1886 port->changed = false; 1887 } 1888 if ((port->removed && 1889 nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) || 1890 (port->state.linkup && 1891 nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) || 1892 nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) || 1893 nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex)) 1894 goto nla_put_failure; 1895 nla_nest_end(skb, port_item); 1896 } 1897 1898 nla_nest_end(skb, port_list); 1899 return genlmsg_end(skb, hdr); 1900 1901 nla_put_failure: 1902 genlmsg_cancel(skb, hdr); 1903 return -EMSGSIZE; 1904 } 1905 1906 static int team_nl_fill_port_list_get_all(struct sk_buff *skb, 1907 struct genl_info *info, int flags, 1908 struct team *team) 1909 { 1910 return team_nl_fill_port_list_get(skb, info->snd_pid, 1911 info->snd_seq, NLM_F_ACK, 1912 team, true); 1913 } 1914 1915 static int team_nl_cmd_port_list_get(struct sk_buff *skb, 1916 struct genl_info *info) 1917 { 1918 struct team *team; 1919 int err; 1920 1921 team = team_nl_team_get(info); 1922 if (!team) 1923 return -EINVAL; 1924 1925 err = team_nl_send_generic(info, team, team_nl_fill_port_list_get_all); 1926 1927 team_nl_team_put(team); 1928 1929 return err; 1930 } 1931 1932 static struct genl_ops team_nl_ops[] = { 1933 { 1934 .cmd = TEAM_CMD_NOOP, 1935 .doit = team_nl_cmd_noop, 1936 .policy = team_nl_policy, 1937 }, 1938 { 1939 .cmd = TEAM_CMD_OPTIONS_SET, 1940 .doit = team_nl_cmd_options_set, 1941 .policy = team_nl_policy, 1942 .flags = GENL_ADMIN_PERM, 1943 }, 1944 { 1945 .cmd = TEAM_CMD_OPTIONS_GET, 1946 .doit = team_nl_cmd_options_get, 1947 .policy = team_nl_policy, 1948 .flags = GENL_ADMIN_PERM, 1949 }, 1950 { 1951 .cmd = TEAM_CMD_PORT_LIST_GET, 1952 .doit = team_nl_cmd_port_list_get, 1953 .policy = team_nl_policy, 1954 .flags = GENL_ADMIN_PERM, 1955 }, 1956 }; 1957 1958 static struct genl_multicast_group team_change_event_mcgrp = { 1959 .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, 1960 }; 1961 1962 static int team_nl_send_event_options_get(struct team *team, 1963 struct list_head *sel_opt_inst_list) 1964 { 1965 struct sk_buff *skb; 1966 int err; 1967 struct net *net = dev_net(team->dev); 1968 1969 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); 1970 if (!skb) 1971 return -ENOMEM; 1972 1973 err = team_nl_fill_options_get(skb, 0, 0, 0, team, sel_opt_inst_list); 1974 if (err < 0) 1975 goto err_fill; 1976 1977 err = genlmsg_multicast_netns(net, skb, 0, team_change_event_mcgrp.id, 1978 GFP_KERNEL); 1979 return err; 1980 1981 err_fill: 1982 nlmsg_free(skb); 1983 return err; 1984 } 1985 1986 static int team_nl_send_event_port_list_get(struct team *team) 1987 { 1988 struct sk_buff *skb; 1989 int err; 1990 struct net *net = dev_net(team->dev); 1991 1992 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); 1993 if (!skb) 1994 return -ENOMEM; 1995 1996 err = team_nl_fill_port_list_get(skb, 0, 0, 0, team, false); 1997 if (err < 0) 1998 goto err_fill; 1999 2000 err = genlmsg_multicast_netns(net, skb, 0, team_change_event_mcgrp.id, 2001 GFP_KERNEL); 2002 return err; 2003 2004 err_fill: 2005 nlmsg_free(skb); 2006 return err; 2007 } 2008 2009 static int team_nl_init(void) 2010 { 2011 int err; 2012 2013 err = genl_register_family_with_ops(&team_nl_family, team_nl_ops, 2014 ARRAY_SIZE(team_nl_ops)); 2015 if (err) 2016 return err; 2017 2018 err = genl_register_mc_group(&team_nl_family, &team_change_event_mcgrp); 2019 if (err) 2020 goto err_change_event_grp_reg; 2021 2022 return 0; 2023 2024 err_change_event_grp_reg: 2025 genl_unregister_family(&team_nl_family); 2026 2027 return err; 2028 } 2029 2030 static void team_nl_fini(void) 2031 { 2032 genl_unregister_family(&team_nl_family); 2033 } 2034 2035 2036 /****************** 2037 * Change checkers 2038 ******************/ 2039 2040 static void __team_options_change_check(struct team *team) 2041 { 2042 int err; 2043 struct team_option_inst *opt_inst; 2044 LIST_HEAD(sel_opt_inst_list); 2045 2046 list_for_each_entry(opt_inst, &team->option_inst_list, list) { 2047 if (opt_inst->changed) 2048 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list); 2049 } 2050 err = team_nl_send_event_options_get(team, &sel_opt_inst_list); 2051 if (err) 2052 netdev_warn(team->dev, "Failed to send options change via netlink\n"); 2053 } 2054 2055 static void __team_option_inst_change(struct team *team, 2056 struct team_option_inst *sel_opt_inst) 2057 { 2058 int err; 2059 LIST_HEAD(sel_opt_inst_list); 2060 2061 sel_opt_inst->changed = true; 2062 list_add(&sel_opt_inst->tmp_list, &sel_opt_inst_list); 2063 err = team_nl_send_event_options_get(team, &sel_opt_inst_list); 2064 if (err) 2065 netdev_warn(team->dev, "Failed to send option change via netlink\n"); 2066 } 2067 2068 /* rtnl lock is held */ 2069 static void __team_port_change_check(struct team_port *port, bool linkup) 2070 { 2071 int err; 2072 2073 if (!port->removed && port->state.linkup == linkup) 2074 return; 2075 2076 port->changed = true; 2077 port->state.linkup = linkup; 2078 team_refresh_port_linkup(port); 2079 if (linkup) { 2080 struct ethtool_cmd ecmd; 2081 2082 err = __ethtool_get_settings(port->dev, &ecmd); 2083 if (!err) { 2084 port->state.speed = ethtool_cmd_speed(&ecmd); 2085 port->state.duplex = ecmd.duplex; 2086 goto send_event; 2087 } 2088 } 2089 port->state.speed = 0; 2090 port->state.duplex = 0; 2091 2092 send_event: 2093 err = team_nl_send_event_port_list_get(port->team); 2094 if (err) 2095 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink\n", 2096 port->dev->name); 2097 2098 } 2099 2100 static void team_port_change_check(struct team_port *port, bool linkup) 2101 { 2102 struct team *team = port->team; 2103 2104 mutex_lock(&team->lock); 2105 __team_port_change_check(port, linkup); 2106 mutex_unlock(&team->lock); 2107 } 2108 2109 2110 /************************************ 2111 * Net device notifier event handler 2112 ************************************/ 2113 2114 static int team_device_event(struct notifier_block *unused, 2115 unsigned long event, void *ptr) 2116 { 2117 struct net_device *dev = (struct net_device *) ptr; 2118 struct team_port *port; 2119 2120 port = team_port_get_rtnl(dev); 2121 if (!port) 2122 return NOTIFY_DONE; 2123 2124 switch (event) { 2125 case NETDEV_UP: 2126 if (netif_carrier_ok(dev)) 2127 team_port_change_check(port, true); 2128 case NETDEV_DOWN: 2129 team_port_change_check(port, false); 2130 case NETDEV_CHANGE: 2131 if (netif_running(port->dev)) 2132 team_port_change_check(port, 2133 !!netif_carrier_ok(port->dev)); 2134 break; 2135 case NETDEV_UNREGISTER: 2136 team_del_slave(port->team->dev, dev); 2137 break; 2138 case NETDEV_FEAT_CHANGE: 2139 team_compute_features(port->team); 2140 break; 2141 case NETDEV_CHANGEMTU: 2142 /* Forbid to change mtu of underlaying device */ 2143 return NOTIFY_BAD; 2144 case NETDEV_PRE_TYPE_CHANGE: 2145 /* Forbid to change type of underlaying device */ 2146 return NOTIFY_BAD; 2147 } 2148 return NOTIFY_DONE; 2149 } 2150 2151 static struct notifier_block team_notifier_block __read_mostly = { 2152 .notifier_call = team_device_event, 2153 }; 2154 2155 2156 /*********************** 2157 * Module init and exit 2158 ***********************/ 2159 2160 static int __init team_module_init(void) 2161 { 2162 int err; 2163 2164 register_netdevice_notifier(&team_notifier_block); 2165 2166 err = rtnl_link_register(&team_link_ops); 2167 if (err) 2168 goto err_rtnl_reg; 2169 2170 err = team_nl_init(); 2171 if (err) 2172 goto err_nl_init; 2173 2174 return 0; 2175 2176 err_nl_init: 2177 rtnl_link_unregister(&team_link_ops); 2178 2179 err_rtnl_reg: 2180 unregister_netdevice_notifier(&team_notifier_block); 2181 2182 return err; 2183 } 2184 2185 static void __exit team_module_exit(void) 2186 { 2187 team_nl_fini(); 2188 rtnl_link_unregister(&team_link_ops); 2189 unregister_netdevice_notifier(&team_notifier_block); 2190 } 2191 2192 module_init(team_module_init); 2193 module_exit(team_module_exit); 2194 2195 MODULE_LICENSE("GPL v2"); 2196 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>"); 2197 MODULE_DESCRIPTION("Ethernet team device driver"); 2198 MODULE_ALIAS_RTNL_LINK(DRV_NAME); 2199