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