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 gfp_t gfp) 800 { 801 struct netpoll *np; 802 int err; 803 804 np = kzalloc(sizeof(*np), gfp); 805 if (!np) 806 return -ENOMEM; 807 808 err = __netpoll_setup(np, port->dev, gfp); 809 if (err) { 810 kfree(np); 811 return err; 812 } 813 port->np = np; 814 return err; 815 } 816 817 static void team_port_disable_netpoll(struct team_port *port) 818 { 819 struct netpoll *np = port->np; 820 821 if (!np) 822 return; 823 port->np = NULL; 824 825 /* Wait for transmitting packets to finish before freeing. */ 826 synchronize_rcu_bh(); 827 __netpoll_cleanup(np); 828 kfree(np); 829 } 830 831 static struct netpoll_info *team_netpoll_info(struct team *team) 832 { 833 return team->dev->npinfo; 834 } 835 836 #else 837 static int team_port_enable_netpoll(struct team *team, struct team_port *port, 838 gfp_t gfp) 839 { 840 return 0; 841 } 842 static void team_port_disable_netpoll(struct team_port *port) 843 { 844 } 845 static struct netpoll_info *team_netpoll_info(struct team *team) 846 { 847 return NULL; 848 } 849 #endif 850 851 static void __team_port_change_check(struct team_port *port, bool linkup); 852 853 static int team_port_add(struct team *team, struct net_device *port_dev) 854 { 855 struct net_device *dev = team->dev; 856 struct team_port *port; 857 char *portname = port_dev->name; 858 int err; 859 860 if (port_dev->flags & IFF_LOOPBACK || 861 port_dev->type != ARPHRD_ETHER) { 862 netdev_err(dev, "Device %s is of an unsupported type\n", 863 portname); 864 return -EINVAL; 865 } 866 867 if (team_port_exists(port_dev)) { 868 netdev_err(dev, "Device %s is already a port " 869 "of a team device\n", portname); 870 return -EBUSY; 871 } 872 873 if (port_dev->flags & IFF_UP) { 874 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n", 875 portname); 876 return -EBUSY; 877 } 878 879 port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size, 880 GFP_KERNEL); 881 if (!port) 882 return -ENOMEM; 883 884 port->dev = port_dev; 885 port->team = team; 886 887 port->orig.mtu = port_dev->mtu; 888 err = dev_set_mtu(port_dev, dev->mtu); 889 if (err) { 890 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err); 891 goto err_set_mtu; 892 } 893 894 memcpy(port->orig.dev_addr, port_dev->dev_addr, ETH_ALEN); 895 896 err = team_port_enter(team, port); 897 if (err) { 898 netdev_err(dev, "Device %s failed to enter team mode\n", 899 portname); 900 goto err_port_enter; 901 } 902 903 err = dev_open(port_dev); 904 if (err) { 905 netdev_dbg(dev, "Device %s opening failed\n", 906 portname); 907 goto err_dev_open; 908 } 909 910 err = vlan_vids_add_by_dev(port_dev, dev); 911 if (err) { 912 netdev_err(dev, "Failed to add vlan ids to device %s\n", 913 portname); 914 goto err_vids_add; 915 } 916 917 if (team_netpoll_info(team)) { 918 err = team_port_enable_netpoll(team, port, GFP_KERNEL); 919 if (err) { 920 netdev_err(dev, "Failed to enable netpoll on device %s\n", 921 portname); 922 goto err_enable_netpoll; 923 } 924 } 925 926 err = netdev_set_master(port_dev, dev); 927 if (err) { 928 netdev_err(dev, "Device %s failed to set master\n", portname); 929 goto err_set_master; 930 } 931 932 err = netdev_rx_handler_register(port_dev, team_handle_frame, 933 port); 934 if (err) { 935 netdev_err(dev, "Device %s failed to register rx_handler\n", 936 portname); 937 goto err_handler_register; 938 } 939 940 err = __team_option_inst_add_port(team, port); 941 if (err) { 942 netdev_err(dev, "Device %s failed to add per-port options\n", 943 portname); 944 goto err_option_port_add; 945 } 946 947 port->index = -1; 948 team_port_enable(team, port); 949 list_add_tail_rcu(&port->list, &team->port_list); 950 __team_compute_features(team); 951 __team_port_change_check(port, !!netif_carrier_ok(port_dev)); 952 __team_options_change_check(team); 953 954 netdev_info(dev, "Port device %s added\n", portname); 955 956 return 0; 957 958 err_option_port_add: 959 netdev_rx_handler_unregister(port_dev); 960 961 err_handler_register: 962 netdev_set_master(port_dev, NULL); 963 964 err_set_master: 965 team_port_disable_netpoll(port); 966 967 err_enable_netpoll: 968 vlan_vids_del_by_dev(port_dev, dev); 969 970 err_vids_add: 971 dev_close(port_dev); 972 973 err_dev_open: 974 team_port_leave(team, port); 975 team_port_set_orig_mac(port); 976 977 err_port_enter: 978 dev_set_mtu(port_dev, port->orig.mtu); 979 980 err_set_mtu: 981 kfree(port); 982 983 return err; 984 } 985 986 static int team_port_del(struct team *team, struct net_device *port_dev) 987 { 988 struct net_device *dev = team->dev; 989 struct team_port *port; 990 char *portname = port_dev->name; 991 992 port = team_port_get_rtnl(port_dev); 993 if (!port || !team_port_find(team, port)) { 994 netdev_err(dev, "Device %s does not act as a port of this team\n", 995 portname); 996 return -ENOENT; 997 } 998 999 __team_option_inst_mark_removed_port(team, port); 1000 __team_options_change_check(team); 1001 __team_option_inst_del_port(team, port); 1002 port->removed = true; 1003 __team_port_change_check(port, false); 1004 team_port_disable(team, port); 1005 list_del_rcu(&port->list); 1006 netdev_rx_handler_unregister(port_dev); 1007 netdev_set_master(port_dev, NULL); 1008 team_port_disable_netpoll(port); 1009 vlan_vids_del_by_dev(port_dev, dev); 1010 dev_close(port_dev); 1011 team_port_leave(team, port); 1012 team_port_set_orig_mac(port); 1013 dev_set_mtu(port_dev, port->orig.mtu); 1014 synchronize_rcu(); 1015 kfree(port); 1016 netdev_info(dev, "Port device %s removed\n", portname); 1017 __team_compute_features(team); 1018 1019 return 0; 1020 } 1021 1022 1023 /***************** 1024 * Net device ops 1025 *****************/ 1026 1027 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx) 1028 { 1029 ctx->data.str_val = team->mode->kind; 1030 return 0; 1031 } 1032 1033 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx) 1034 { 1035 return team_change_mode(team, ctx->data.str_val); 1036 } 1037 1038 static int team_port_en_option_get(struct team *team, 1039 struct team_gsetter_ctx *ctx) 1040 { 1041 struct team_port *port = ctx->info->port; 1042 1043 ctx->data.bool_val = team_port_enabled(port); 1044 return 0; 1045 } 1046 1047 static int team_port_en_option_set(struct team *team, 1048 struct team_gsetter_ctx *ctx) 1049 { 1050 struct team_port *port = ctx->info->port; 1051 1052 if (ctx->data.bool_val) 1053 team_port_enable(team, port); 1054 else 1055 team_port_disable(team, port); 1056 return 0; 1057 } 1058 1059 static int team_user_linkup_option_get(struct team *team, 1060 struct team_gsetter_ctx *ctx) 1061 { 1062 struct team_port *port = ctx->info->port; 1063 1064 ctx->data.bool_val = port->user.linkup; 1065 return 0; 1066 } 1067 1068 static int team_user_linkup_option_set(struct team *team, 1069 struct team_gsetter_ctx *ctx) 1070 { 1071 struct team_port *port = ctx->info->port; 1072 1073 port->user.linkup = ctx->data.bool_val; 1074 team_refresh_port_linkup(port); 1075 return 0; 1076 } 1077 1078 static int team_user_linkup_en_option_get(struct team *team, 1079 struct team_gsetter_ctx *ctx) 1080 { 1081 struct team_port *port = ctx->info->port; 1082 1083 ctx->data.bool_val = port->user.linkup_enabled; 1084 return 0; 1085 } 1086 1087 static int team_user_linkup_en_option_set(struct team *team, 1088 struct team_gsetter_ctx *ctx) 1089 { 1090 struct team_port *port = ctx->info->port; 1091 1092 port->user.linkup_enabled = ctx->data.bool_val; 1093 team_refresh_port_linkup(port); 1094 return 0; 1095 } 1096 1097 static const struct team_option team_options[] = { 1098 { 1099 .name = "mode", 1100 .type = TEAM_OPTION_TYPE_STRING, 1101 .getter = team_mode_option_get, 1102 .setter = team_mode_option_set, 1103 }, 1104 { 1105 .name = "enabled", 1106 .type = TEAM_OPTION_TYPE_BOOL, 1107 .per_port = true, 1108 .getter = team_port_en_option_get, 1109 .setter = team_port_en_option_set, 1110 }, 1111 { 1112 .name = "user_linkup", 1113 .type = TEAM_OPTION_TYPE_BOOL, 1114 .per_port = true, 1115 .getter = team_user_linkup_option_get, 1116 .setter = team_user_linkup_option_set, 1117 }, 1118 { 1119 .name = "user_linkup_enabled", 1120 .type = TEAM_OPTION_TYPE_BOOL, 1121 .per_port = true, 1122 .getter = team_user_linkup_en_option_get, 1123 .setter = team_user_linkup_en_option_set, 1124 }, 1125 }; 1126 1127 static struct lock_class_key team_netdev_xmit_lock_key; 1128 static struct lock_class_key team_netdev_addr_lock_key; 1129 1130 static void team_set_lockdep_class_one(struct net_device *dev, 1131 struct netdev_queue *txq, 1132 void *unused) 1133 { 1134 lockdep_set_class(&txq->_xmit_lock, &team_netdev_xmit_lock_key); 1135 } 1136 1137 static void team_set_lockdep_class(struct net_device *dev) 1138 { 1139 lockdep_set_class(&dev->addr_list_lock, &team_netdev_addr_lock_key); 1140 netdev_for_each_tx_queue(dev, team_set_lockdep_class_one, NULL); 1141 } 1142 1143 static int team_init(struct net_device *dev) 1144 { 1145 struct team *team = netdev_priv(dev); 1146 int i; 1147 int err; 1148 1149 team->dev = dev; 1150 mutex_init(&team->lock); 1151 team_set_no_mode(team); 1152 1153 team->pcpu_stats = alloc_percpu(struct team_pcpu_stats); 1154 if (!team->pcpu_stats) 1155 return -ENOMEM; 1156 1157 for (i = 0; i < TEAM_PORT_HASHENTRIES; i++) 1158 INIT_HLIST_HEAD(&team->en_port_hlist[i]); 1159 INIT_LIST_HEAD(&team->port_list); 1160 1161 team_adjust_ops(team); 1162 1163 INIT_LIST_HEAD(&team->option_list); 1164 INIT_LIST_HEAD(&team->option_inst_list); 1165 err = team_options_register(team, team_options, ARRAY_SIZE(team_options)); 1166 if (err) 1167 goto err_options_register; 1168 netif_carrier_off(dev); 1169 1170 team_set_lockdep_class(dev); 1171 1172 return 0; 1173 1174 err_options_register: 1175 free_percpu(team->pcpu_stats); 1176 1177 return err; 1178 } 1179 1180 static void team_uninit(struct net_device *dev) 1181 { 1182 struct team *team = netdev_priv(dev); 1183 struct team_port *port; 1184 struct team_port *tmp; 1185 1186 mutex_lock(&team->lock); 1187 list_for_each_entry_safe(port, tmp, &team->port_list, list) 1188 team_port_del(team, port->dev); 1189 1190 __team_change_mode(team, NULL); /* cleanup */ 1191 __team_options_unregister(team, team_options, ARRAY_SIZE(team_options)); 1192 mutex_unlock(&team->lock); 1193 } 1194 1195 static void team_destructor(struct net_device *dev) 1196 { 1197 struct team *team = netdev_priv(dev); 1198 1199 free_percpu(team->pcpu_stats); 1200 free_netdev(dev); 1201 } 1202 1203 static int team_open(struct net_device *dev) 1204 { 1205 netif_carrier_on(dev); 1206 return 0; 1207 } 1208 1209 static int team_close(struct net_device *dev) 1210 { 1211 netif_carrier_off(dev); 1212 return 0; 1213 } 1214 1215 /* 1216 * note: already called with rcu_read_lock 1217 */ 1218 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev) 1219 { 1220 struct team *team = netdev_priv(dev); 1221 bool tx_success = false; 1222 unsigned int len = skb->len; 1223 1224 tx_success = team->ops.transmit(team, skb); 1225 if (tx_success) { 1226 struct team_pcpu_stats *pcpu_stats; 1227 1228 pcpu_stats = this_cpu_ptr(team->pcpu_stats); 1229 u64_stats_update_begin(&pcpu_stats->syncp); 1230 pcpu_stats->tx_packets++; 1231 pcpu_stats->tx_bytes += len; 1232 u64_stats_update_end(&pcpu_stats->syncp); 1233 } else { 1234 this_cpu_inc(team->pcpu_stats->tx_dropped); 1235 } 1236 1237 return NETDEV_TX_OK; 1238 } 1239 1240 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb) 1241 { 1242 /* 1243 * This helper function exists to help dev_pick_tx get the correct 1244 * destination queue. Using a helper function skips a call to 1245 * skb_tx_hash and will put the skbs in the queue we expect on their 1246 * way down to the team driver. 1247 */ 1248 u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0; 1249 1250 /* 1251 * Save the original txq to restore before passing to the driver 1252 */ 1253 qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping; 1254 1255 if (unlikely(txq >= dev->real_num_tx_queues)) { 1256 do { 1257 txq -= dev->real_num_tx_queues; 1258 } while (txq >= dev->real_num_tx_queues); 1259 } 1260 return txq; 1261 } 1262 1263 static void team_change_rx_flags(struct net_device *dev, int change) 1264 { 1265 struct team *team = netdev_priv(dev); 1266 struct team_port *port; 1267 int inc; 1268 1269 rcu_read_lock(); 1270 list_for_each_entry_rcu(port, &team->port_list, list) { 1271 if (change & IFF_PROMISC) { 1272 inc = dev->flags & IFF_PROMISC ? 1 : -1; 1273 dev_set_promiscuity(port->dev, inc); 1274 } 1275 if (change & IFF_ALLMULTI) { 1276 inc = dev->flags & IFF_ALLMULTI ? 1 : -1; 1277 dev_set_allmulti(port->dev, inc); 1278 } 1279 } 1280 rcu_read_unlock(); 1281 } 1282 1283 static void team_set_rx_mode(struct net_device *dev) 1284 { 1285 struct team *team = netdev_priv(dev); 1286 struct team_port *port; 1287 1288 rcu_read_lock(); 1289 list_for_each_entry_rcu(port, &team->port_list, list) { 1290 dev_uc_sync(port->dev, dev); 1291 dev_mc_sync(port->dev, dev); 1292 } 1293 rcu_read_unlock(); 1294 } 1295 1296 static int team_set_mac_address(struct net_device *dev, void *p) 1297 { 1298 struct team *team = netdev_priv(dev); 1299 struct team_port *port; 1300 int err; 1301 1302 err = eth_mac_addr(dev, p); 1303 if (err) 1304 return err; 1305 rcu_read_lock(); 1306 list_for_each_entry_rcu(port, &team->port_list, list) 1307 if (team->ops.port_change_mac) 1308 team->ops.port_change_mac(team, port); 1309 rcu_read_unlock(); 1310 return 0; 1311 } 1312 1313 static int team_change_mtu(struct net_device *dev, int new_mtu) 1314 { 1315 struct team *team = netdev_priv(dev); 1316 struct team_port *port; 1317 int err; 1318 1319 /* 1320 * Alhough this is reader, it's guarded by team lock. It's not possible 1321 * to traverse list in reverse under rcu_read_lock 1322 */ 1323 mutex_lock(&team->lock); 1324 list_for_each_entry(port, &team->port_list, list) { 1325 err = dev_set_mtu(port->dev, new_mtu); 1326 if (err) { 1327 netdev_err(dev, "Device %s failed to change mtu", 1328 port->dev->name); 1329 goto unwind; 1330 } 1331 } 1332 mutex_unlock(&team->lock); 1333 1334 dev->mtu = new_mtu; 1335 1336 return 0; 1337 1338 unwind: 1339 list_for_each_entry_continue_reverse(port, &team->port_list, list) 1340 dev_set_mtu(port->dev, dev->mtu); 1341 mutex_unlock(&team->lock); 1342 1343 return err; 1344 } 1345 1346 static struct rtnl_link_stats64 * 1347 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) 1348 { 1349 struct team *team = netdev_priv(dev); 1350 struct team_pcpu_stats *p; 1351 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes; 1352 u32 rx_dropped = 0, tx_dropped = 0; 1353 unsigned int start; 1354 int i; 1355 1356 for_each_possible_cpu(i) { 1357 p = per_cpu_ptr(team->pcpu_stats, i); 1358 do { 1359 start = u64_stats_fetch_begin_bh(&p->syncp); 1360 rx_packets = p->rx_packets; 1361 rx_bytes = p->rx_bytes; 1362 rx_multicast = p->rx_multicast; 1363 tx_packets = p->tx_packets; 1364 tx_bytes = p->tx_bytes; 1365 } while (u64_stats_fetch_retry_bh(&p->syncp, start)); 1366 1367 stats->rx_packets += rx_packets; 1368 stats->rx_bytes += rx_bytes; 1369 stats->multicast += rx_multicast; 1370 stats->tx_packets += tx_packets; 1371 stats->tx_bytes += tx_bytes; 1372 /* 1373 * rx_dropped & tx_dropped are u32, updated 1374 * without syncp protection. 1375 */ 1376 rx_dropped += p->rx_dropped; 1377 tx_dropped += p->tx_dropped; 1378 } 1379 stats->rx_dropped = rx_dropped; 1380 stats->tx_dropped = tx_dropped; 1381 return stats; 1382 } 1383 1384 static int team_vlan_rx_add_vid(struct net_device *dev, uint16_t vid) 1385 { 1386 struct team *team = netdev_priv(dev); 1387 struct team_port *port; 1388 int err; 1389 1390 /* 1391 * Alhough this is reader, it's guarded by team lock. It's not possible 1392 * to traverse list in reverse under rcu_read_lock 1393 */ 1394 mutex_lock(&team->lock); 1395 list_for_each_entry(port, &team->port_list, list) { 1396 err = vlan_vid_add(port->dev, vid); 1397 if (err) 1398 goto unwind; 1399 } 1400 mutex_unlock(&team->lock); 1401 1402 return 0; 1403 1404 unwind: 1405 list_for_each_entry_continue_reverse(port, &team->port_list, list) 1406 vlan_vid_del(port->dev, vid); 1407 mutex_unlock(&team->lock); 1408 1409 return err; 1410 } 1411 1412 static int team_vlan_rx_kill_vid(struct net_device *dev, uint16_t vid) 1413 { 1414 struct team *team = netdev_priv(dev); 1415 struct team_port *port; 1416 1417 rcu_read_lock(); 1418 list_for_each_entry_rcu(port, &team->port_list, list) 1419 vlan_vid_del(port->dev, vid); 1420 rcu_read_unlock(); 1421 1422 return 0; 1423 } 1424 1425 #ifdef CONFIG_NET_POLL_CONTROLLER 1426 static void team_poll_controller(struct net_device *dev) 1427 { 1428 } 1429 1430 static void __team_netpoll_cleanup(struct team *team) 1431 { 1432 struct team_port *port; 1433 1434 list_for_each_entry(port, &team->port_list, list) 1435 team_port_disable_netpoll(port); 1436 } 1437 1438 static void team_netpoll_cleanup(struct net_device *dev) 1439 { 1440 struct team *team = netdev_priv(dev); 1441 1442 mutex_lock(&team->lock); 1443 __team_netpoll_cleanup(team); 1444 mutex_unlock(&team->lock); 1445 } 1446 1447 static int team_netpoll_setup(struct net_device *dev, 1448 struct netpoll_info *npifo, gfp_t gfp) 1449 { 1450 struct team *team = netdev_priv(dev); 1451 struct team_port *port; 1452 int err = 0; 1453 1454 mutex_lock(&team->lock); 1455 list_for_each_entry(port, &team->port_list, list) { 1456 err = team_port_enable_netpoll(team, port, gfp); 1457 if (err) { 1458 __team_netpoll_cleanup(team); 1459 break; 1460 } 1461 } 1462 mutex_unlock(&team->lock); 1463 return err; 1464 } 1465 #endif 1466 1467 static int team_add_slave(struct net_device *dev, struct net_device *port_dev) 1468 { 1469 struct team *team = netdev_priv(dev); 1470 int err; 1471 1472 mutex_lock(&team->lock); 1473 err = team_port_add(team, port_dev); 1474 mutex_unlock(&team->lock); 1475 return err; 1476 } 1477 1478 static int team_del_slave(struct net_device *dev, struct net_device *port_dev) 1479 { 1480 struct team *team = netdev_priv(dev); 1481 int err; 1482 1483 mutex_lock(&team->lock); 1484 err = team_port_del(team, port_dev); 1485 mutex_unlock(&team->lock); 1486 return err; 1487 } 1488 1489 static netdev_features_t team_fix_features(struct net_device *dev, 1490 netdev_features_t features) 1491 { 1492 struct team_port *port; 1493 struct team *team = netdev_priv(dev); 1494 netdev_features_t mask; 1495 1496 mask = features; 1497 features &= ~NETIF_F_ONE_FOR_ALL; 1498 features |= NETIF_F_ALL_FOR_ALL; 1499 1500 rcu_read_lock(); 1501 list_for_each_entry_rcu(port, &team->port_list, list) { 1502 features = netdev_increment_features(features, 1503 port->dev->features, 1504 mask); 1505 } 1506 rcu_read_unlock(); 1507 return features; 1508 } 1509 1510 static const struct net_device_ops team_netdev_ops = { 1511 .ndo_init = team_init, 1512 .ndo_uninit = team_uninit, 1513 .ndo_open = team_open, 1514 .ndo_stop = team_close, 1515 .ndo_start_xmit = team_xmit, 1516 .ndo_select_queue = team_select_queue, 1517 .ndo_change_rx_flags = team_change_rx_flags, 1518 .ndo_set_rx_mode = team_set_rx_mode, 1519 .ndo_set_mac_address = team_set_mac_address, 1520 .ndo_change_mtu = team_change_mtu, 1521 .ndo_get_stats64 = team_get_stats64, 1522 .ndo_vlan_rx_add_vid = team_vlan_rx_add_vid, 1523 .ndo_vlan_rx_kill_vid = team_vlan_rx_kill_vid, 1524 #ifdef CONFIG_NET_POLL_CONTROLLER 1525 .ndo_poll_controller = team_poll_controller, 1526 .ndo_netpoll_setup = team_netpoll_setup, 1527 .ndo_netpoll_cleanup = team_netpoll_cleanup, 1528 #endif 1529 .ndo_add_slave = team_add_slave, 1530 .ndo_del_slave = team_del_slave, 1531 .ndo_fix_features = team_fix_features, 1532 }; 1533 1534 1535 /*********************** 1536 * rt netlink interface 1537 ***********************/ 1538 1539 static void team_setup(struct net_device *dev) 1540 { 1541 ether_setup(dev); 1542 1543 dev->netdev_ops = &team_netdev_ops; 1544 dev->destructor = team_destructor; 1545 dev->tx_queue_len = 0; 1546 dev->flags |= IFF_MULTICAST; 1547 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); 1548 1549 /* 1550 * Indicate we support unicast address filtering. That way core won't 1551 * bring us to promisc mode in case a unicast addr is added. 1552 * Let this up to underlay drivers. 1553 */ 1554 dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE; 1555 1556 dev->features |= NETIF_F_LLTX; 1557 dev->features |= NETIF_F_GRO; 1558 dev->hw_features = NETIF_F_HW_VLAN_TX | 1559 NETIF_F_HW_VLAN_RX | 1560 NETIF_F_HW_VLAN_FILTER; 1561 1562 dev->features |= dev->hw_features; 1563 } 1564 1565 static int team_newlink(struct net *src_net, struct net_device *dev, 1566 struct nlattr *tb[], struct nlattr *data[]) 1567 { 1568 int err; 1569 1570 if (tb[IFLA_ADDRESS] == NULL) 1571 eth_hw_addr_random(dev); 1572 1573 err = register_netdevice(dev); 1574 if (err) 1575 return err; 1576 1577 return 0; 1578 } 1579 1580 static int team_validate(struct nlattr *tb[], struct nlattr *data[]) 1581 { 1582 if (tb[IFLA_ADDRESS]) { 1583 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) 1584 return -EINVAL; 1585 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) 1586 return -EADDRNOTAVAIL; 1587 } 1588 return 0; 1589 } 1590 1591 static unsigned int team_get_num_tx_queues(void) 1592 { 1593 return TEAM_DEFAULT_NUM_TX_QUEUES; 1594 } 1595 1596 static unsigned int team_get_num_rx_queues(void) 1597 { 1598 return TEAM_DEFAULT_NUM_RX_QUEUES; 1599 } 1600 1601 static struct rtnl_link_ops team_link_ops __read_mostly = { 1602 .kind = DRV_NAME, 1603 .priv_size = sizeof(struct team), 1604 .setup = team_setup, 1605 .newlink = team_newlink, 1606 .validate = team_validate, 1607 .get_num_tx_queues = team_get_num_tx_queues, 1608 .get_num_rx_queues = team_get_num_rx_queues, 1609 }; 1610 1611 1612 /*********************************** 1613 * Generic netlink custom interface 1614 ***********************************/ 1615 1616 static struct genl_family team_nl_family = { 1617 .id = GENL_ID_GENERATE, 1618 .name = TEAM_GENL_NAME, 1619 .version = TEAM_GENL_VERSION, 1620 .maxattr = TEAM_ATTR_MAX, 1621 .netnsok = true, 1622 }; 1623 1624 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = { 1625 [TEAM_ATTR_UNSPEC] = { .type = NLA_UNSPEC, }, 1626 [TEAM_ATTR_TEAM_IFINDEX] = { .type = NLA_U32 }, 1627 [TEAM_ATTR_LIST_OPTION] = { .type = NLA_NESTED }, 1628 [TEAM_ATTR_LIST_PORT] = { .type = NLA_NESTED }, 1629 }; 1630 1631 static const struct nla_policy 1632 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = { 1633 [TEAM_ATTR_OPTION_UNSPEC] = { .type = NLA_UNSPEC, }, 1634 [TEAM_ATTR_OPTION_NAME] = { 1635 .type = NLA_STRING, 1636 .len = TEAM_STRING_MAX_LEN, 1637 }, 1638 [TEAM_ATTR_OPTION_CHANGED] = { .type = NLA_FLAG }, 1639 [TEAM_ATTR_OPTION_TYPE] = { .type = NLA_U8 }, 1640 [TEAM_ATTR_OPTION_DATA] = { .type = NLA_BINARY }, 1641 }; 1642 1643 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info) 1644 { 1645 struct sk_buff *msg; 1646 void *hdr; 1647 int err; 1648 1649 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 1650 if (!msg) 1651 return -ENOMEM; 1652 1653 hdr = genlmsg_put(msg, info->snd_pid, info->snd_seq, 1654 &team_nl_family, 0, TEAM_CMD_NOOP); 1655 if (IS_ERR(hdr)) { 1656 err = PTR_ERR(hdr); 1657 goto err_msg_put; 1658 } 1659 1660 genlmsg_end(msg, hdr); 1661 1662 return genlmsg_unicast(genl_info_net(info), msg, info->snd_pid); 1663 1664 err_msg_put: 1665 nlmsg_free(msg); 1666 1667 return err; 1668 } 1669 1670 /* 1671 * Netlink cmd functions should be locked by following two functions. 1672 * Since dev gets held here, that ensures dev won't disappear in between. 1673 */ 1674 static struct team *team_nl_team_get(struct genl_info *info) 1675 { 1676 struct net *net = genl_info_net(info); 1677 int ifindex; 1678 struct net_device *dev; 1679 struct team *team; 1680 1681 if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX]) 1682 return NULL; 1683 1684 ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]); 1685 dev = dev_get_by_index(net, ifindex); 1686 if (!dev || dev->netdev_ops != &team_netdev_ops) { 1687 if (dev) 1688 dev_put(dev); 1689 return NULL; 1690 } 1691 1692 team = netdev_priv(dev); 1693 mutex_lock(&team->lock); 1694 return team; 1695 } 1696 1697 static void team_nl_team_put(struct team *team) 1698 { 1699 mutex_unlock(&team->lock); 1700 dev_put(team->dev); 1701 } 1702 1703 static int team_nl_send_generic(struct genl_info *info, struct team *team, 1704 int (*fill_func)(struct sk_buff *skb, 1705 struct genl_info *info, 1706 int flags, struct team *team)) 1707 { 1708 struct sk_buff *skb; 1709 int err; 1710 1711 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 1712 if (!skb) 1713 return -ENOMEM; 1714 1715 err = fill_func(skb, info, NLM_F_ACK, team); 1716 if (err < 0) 1717 goto err_fill; 1718 1719 err = genlmsg_unicast(genl_info_net(info), skb, info->snd_pid); 1720 return err; 1721 1722 err_fill: 1723 nlmsg_free(skb); 1724 return err; 1725 } 1726 1727 typedef int team_nl_send_func_t(struct sk_buff *skb, 1728 struct team *team, u32 pid); 1729 1730 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 pid) 1731 { 1732 return genlmsg_unicast(dev_net(team->dev), skb, pid); 1733 } 1734 1735 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team, 1736 struct team_option_inst *opt_inst) 1737 { 1738 struct nlattr *option_item; 1739 struct team_option *option = opt_inst->option; 1740 struct team_option_inst_info *opt_inst_info = &opt_inst->info; 1741 struct team_gsetter_ctx ctx; 1742 int err; 1743 1744 ctx.info = opt_inst_info; 1745 err = team_option_get(team, opt_inst, &ctx); 1746 if (err) 1747 return err; 1748 1749 option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION); 1750 if (!option_item) 1751 return -EMSGSIZE; 1752 1753 if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name)) 1754 goto nest_cancel; 1755 if (opt_inst_info->port && 1756 nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX, 1757 opt_inst_info->port->dev->ifindex)) 1758 goto nest_cancel; 1759 if (opt_inst->option->array_size && 1760 nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX, 1761 opt_inst_info->array_index)) 1762 goto nest_cancel; 1763 1764 switch (option->type) { 1765 case TEAM_OPTION_TYPE_U32: 1766 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32)) 1767 goto nest_cancel; 1768 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val)) 1769 goto nest_cancel; 1770 break; 1771 case TEAM_OPTION_TYPE_STRING: 1772 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING)) 1773 goto nest_cancel; 1774 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA, 1775 ctx.data.str_val)) 1776 goto nest_cancel; 1777 break; 1778 case TEAM_OPTION_TYPE_BINARY: 1779 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY)) 1780 goto nest_cancel; 1781 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len, 1782 ctx.data.bin_val.ptr)) 1783 goto nest_cancel; 1784 break; 1785 case TEAM_OPTION_TYPE_BOOL: 1786 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG)) 1787 goto nest_cancel; 1788 if (ctx.data.bool_val && 1789 nla_put_flag(skb, TEAM_ATTR_OPTION_DATA)) 1790 goto nest_cancel; 1791 break; 1792 default: 1793 BUG(); 1794 } 1795 if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED)) 1796 goto nest_cancel; 1797 if (opt_inst->changed) { 1798 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED)) 1799 goto nest_cancel; 1800 opt_inst->changed = false; 1801 } 1802 nla_nest_end(skb, option_item); 1803 return 0; 1804 1805 nest_cancel: 1806 nla_nest_cancel(skb, option_item); 1807 return -EMSGSIZE; 1808 } 1809 1810 static int __send_and_alloc_skb(struct sk_buff **pskb, 1811 struct team *team, u32 pid, 1812 team_nl_send_func_t *send_func) 1813 { 1814 int err; 1815 1816 if (*pskb) { 1817 err = send_func(*pskb, team, pid); 1818 if (err) 1819 return err; 1820 } 1821 *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL); 1822 if (!*pskb) 1823 return -ENOMEM; 1824 return 0; 1825 } 1826 1827 static int team_nl_send_options_get(struct team *team, u32 pid, u32 seq, 1828 int flags, team_nl_send_func_t *send_func, 1829 struct list_head *sel_opt_inst_list) 1830 { 1831 struct nlattr *option_list; 1832 struct nlmsghdr *nlh; 1833 void *hdr; 1834 struct team_option_inst *opt_inst; 1835 int err; 1836 struct sk_buff *skb = NULL; 1837 bool incomplete; 1838 int i; 1839 1840 opt_inst = list_first_entry(sel_opt_inst_list, 1841 struct team_option_inst, tmp_list); 1842 1843 start_again: 1844 err = __send_and_alloc_skb(&skb, team, pid, send_func); 1845 if (err) 1846 return err; 1847 1848 hdr = genlmsg_put(skb, pid, seq, &team_nl_family, flags | NLM_F_MULTI, 1849 TEAM_CMD_OPTIONS_GET); 1850 if (IS_ERR(hdr)) 1851 return PTR_ERR(hdr); 1852 1853 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex)) 1854 goto nla_put_failure; 1855 option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION); 1856 if (!option_list) 1857 goto nla_put_failure; 1858 1859 i = 0; 1860 incomplete = false; 1861 list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) { 1862 err = team_nl_fill_one_option_get(skb, team, opt_inst); 1863 if (err) { 1864 if (err == -EMSGSIZE) { 1865 if (!i) 1866 goto errout; 1867 incomplete = true; 1868 break; 1869 } 1870 goto errout; 1871 } 1872 i++; 1873 } 1874 1875 nla_nest_end(skb, option_list); 1876 genlmsg_end(skb, hdr); 1877 if (incomplete) 1878 goto start_again; 1879 1880 send_done: 1881 nlh = nlmsg_put(skb, pid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI); 1882 if (!nlh) { 1883 err = __send_and_alloc_skb(&skb, team, pid, send_func); 1884 if (err) 1885 goto errout; 1886 goto send_done; 1887 } 1888 1889 return send_func(skb, team, pid); 1890 1891 nla_put_failure: 1892 err = -EMSGSIZE; 1893 errout: 1894 genlmsg_cancel(skb, hdr); 1895 nlmsg_free(skb); 1896 return err; 1897 } 1898 1899 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info) 1900 { 1901 struct team *team; 1902 struct team_option_inst *opt_inst; 1903 int err; 1904 LIST_HEAD(sel_opt_inst_list); 1905 1906 team = team_nl_team_get(info); 1907 if (!team) 1908 return -EINVAL; 1909 1910 list_for_each_entry(opt_inst, &team->option_inst_list, list) 1911 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list); 1912 err = team_nl_send_options_get(team, info->snd_pid, info->snd_seq, 1913 NLM_F_ACK, team_nl_send_unicast, 1914 &sel_opt_inst_list); 1915 1916 team_nl_team_put(team); 1917 1918 return err; 1919 } 1920 1921 static int team_nl_send_event_options_get(struct team *team, 1922 struct list_head *sel_opt_inst_list); 1923 1924 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info) 1925 { 1926 struct team *team; 1927 int err = 0; 1928 int i; 1929 struct nlattr *nl_option; 1930 LIST_HEAD(opt_inst_list); 1931 1932 team = team_nl_team_get(info); 1933 if (!team) 1934 return -EINVAL; 1935 1936 err = -EINVAL; 1937 if (!info->attrs[TEAM_ATTR_LIST_OPTION]) { 1938 err = -EINVAL; 1939 goto team_put; 1940 } 1941 1942 nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) { 1943 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1]; 1944 struct nlattr *attr; 1945 struct nlattr *attr_data; 1946 enum team_option_type opt_type; 1947 int opt_port_ifindex = 0; /* != 0 for per-port options */ 1948 u32 opt_array_index = 0; 1949 bool opt_is_array = false; 1950 struct team_option_inst *opt_inst; 1951 char *opt_name; 1952 bool opt_found = false; 1953 1954 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) { 1955 err = -EINVAL; 1956 goto team_put; 1957 } 1958 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX, 1959 nl_option, team_nl_option_policy); 1960 if (err) 1961 goto team_put; 1962 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] || 1963 !opt_attrs[TEAM_ATTR_OPTION_TYPE]) { 1964 err = -EINVAL; 1965 goto team_put; 1966 } 1967 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) { 1968 case NLA_U32: 1969 opt_type = TEAM_OPTION_TYPE_U32; 1970 break; 1971 case NLA_STRING: 1972 opt_type = TEAM_OPTION_TYPE_STRING; 1973 break; 1974 case NLA_BINARY: 1975 opt_type = TEAM_OPTION_TYPE_BINARY; 1976 break; 1977 case NLA_FLAG: 1978 opt_type = TEAM_OPTION_TYPE_BOOL; 1979 break; 1980 default: 1981 goto team_put; 1982 } 1983 1984 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA]; 1985 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) { 1986 err = -EINVAL; 1987 goto team_put; 1988 } 1989 1990 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]); 1991 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX]; 1992 if (attr) 1993 opt_port_ifindex = nla_get_u32(attr); 1994 1995 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX]; 1996 if (attr) { 1997 opt_is_array = true; 1998 opt_array_index = nla_get_u32(attr); 1999 } 2000 2001 list_for_each_entry(opt_inst, &team->option_inst_list, list) { 2002 struct team_option *option = opt_inst->option; 2003 struct team_gsetter_ctx ctx; 2004 struct team_option_inst_info *opt_inst_info; 2005 int tmp_ifindex; 2006 2007 opt_inst_info = &opt_inst->info; 2008 tmp_ifindex = opt_inst_info->port ? 2009 opt_inst_info->port->dev->ifindex : 0; 2010 if (option->type != opt_type || 2011 strcmp(option->name, opt_name) || 2012 tmp_ifindex != opt_port_ifindex || 2013 (option->array_size && !opt_is_array) || 2014 opt_inst_info->array_index != opt_array_index) 2015 continue; 2016 opt_found = true; 2017 ctx.info = opt_inst_info; 2018 switch (opt_type) { 2019 case TEAM_OPTION_TYPE_U32: 2020 ctx.data.u32_val = nla_get_u32(attr_data); 2021 break; 2022 case TEAM_OPTION_TYPE_STRING: 2023 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) { 2024 err = -EINVAL; 2025 goto team_put; 2026 } 2027 ctx.data.str_val = nla_data(attr_data); 2028 break; 2029 case TEAM_OPTION_TYPE_BINARY: 2030 ctx.data.bin_val.len = nla_len(attr_data); 2031 ctx.data.bin_val.ptr = nla_data(attr_data); 2032 break; 2033 case TEAM_OPTION_TYPE_BOOL: 2034 ctx.data.bool_val = attr_data ? true : false; 2035 break; 2036 default: 2037 BUG(); 2038 } 2039 err = team_option_set(team, opt_inst, &ctx); 2040 if (err) 2041 goto team_put; 2042 opt_inst->changed = true; 2043 list_add(&opt_inst->tmp_list, &opt_inst_list); 2044 } 2045 if (!opt_found) { 2046 err = -ENOENT; 2047 goto team_put; 2048 } 2049 } 2050 2051 err = team_nl_send_event_options_get(team, &opt_inst_list); 2052 2053 team_put: 2054 team_nl_team_put(team); 2055 2056 return err; 2057 } 2058 2059 static int team_nl_fill_port_list_get(struct sk_buff *skb, 2060 u32 pid, u32 seq, int flags, 2061 struct team *team, 2062 bool fillall) 2063 { 2064 struct nlattr *port_list; 2065 void *hdr; 2066 struct team_port *port; 2067 2068 hdr = genlmsg_put(skb, pid, seq, &team_nl_family, flags, 2069 TEAM_CMD_PORT_LIST_GET); 2070 if (IS_ERR(hdr)) 2071 return PTR_ERR(hdr); 2072 2073 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex)) 2074 goto nla_put_failure; 2075 port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT); 2076 if (!port_list) 2077 goto nla_put_failure; 2078 2079 list_for_each_entry(port, &team->port_list, list) { 2080 struct nlattr *port_item; 2081 2082 /* Include only changed ports if fill all mode is not on */ 2083 if (!fillall && !port->changed) 2084 continue; 2085 port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT); 2086 if (!port_item) 2087 goto nla_put_failure; 2088 if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex)) 2089 goto nla_put_failure; 2090 if (port->changed) { 2091 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED)) 2092 goto nla_put_failure; 2093 port->changed = false; 2094 } 2095 if ((port->removed && 2096 nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) || 2097 (port->state.linkup && 2098 nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) || 2099 nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) || 2100 nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex)) 2101 goto nla_put_failure; 2102 nla_nest_end(skb, port_item); 2103 } 2104 2105 nla_nest_end(skb, port_list); 2106 return genlmsg_end(skb, hdr); 2107 2108 nla_put_failure: 2109 genlmsg_cancel(skb, hdr); 2110 return -EMSGSIZE; 2111 } 2112 2113 static int team_nl_fill_port_list_get_all(struct sk_buff *skb, 2114 struct genl_info *info, int flags, 2115 struct team *team) 2116 { 2117 return team_nl_fill_port_list_get(skb, info->snd_pid, 2118 info->snd_seq, NLM_F_ACK, 2119 team, true); 2120 } 2121 2122 static int team_nl_cmd_port_list_get(struct sk_buff *skb, 2123 struct genl_info *info) 2124 { 2125 struct team *team; 2126 int err; 2127 2128 team = team_nl_team_get(info); 2129 if (!team) 2130 return -EINVAL; 2131 2132 err = team_nl_send_generic(info, team, team_nl_fill_port_list_get_all); 2133 2134 team_nl_team_put(team); 2135 2136 return err; 2137 } 2138 2139 static struct genl_ops team_nl_ops[] = { 2140 { 2141 .cmd = TEAM_CMD_NOOP, 2142 .doit = team_nl_cmd_noop, 2143 .policy = team_nl_policy, 2144 }, 2145 { 2146 .cmd = TEAM_CMD_OPTIONS_SET, 2147 .doit = team_nl_cmd_options_set, 2148 .policy = team_nl_policy, 2149 .flags = GENL_ADMIN_PERM, 2150 }, 2151 { 2152 .cmd = TEAM_CMD_OPTIONS_GET, 2153 .doit = team_nl_cmd_options_get, 2154 .policy = team_nl_policy, 2155 .flags = GENL_ADMIN_PERM, 2156 }, 2157 { 2158 .cmd = TEAM_CMD_PORT_LIST_GET, 2159 .doit = team_nl_cmd_port_list_get, 2160 .policy = team_nl_policy, 2161 .flags = GENL_ADMIN_PERM, 2162 }, 2163 }; 2164 2165 static struct genl_multicast_group team_change_event_mcgrp = { 2166 .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, 2167 }; 2168 2169 static int team_nl_send_multicast(struct sk_buff *skb, 2170 struct team *team, u32 pid) 2171 { 2172 return genlmsg_multicast_netns(dev_net(team->dev), skb, 0, 2173 team_change_event_mcgrp.id, GFP_KERNEL); 2174 } 2175 2176 static int team_nl_send_event_options_get(struct team *team, 2177 struct list_head *sel_opt_inst_list) 2178 { 2179 return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast, 2180 sel_opt_inst_list); 2181 } 2182 2183 static int team_nl_send_event_port_list_get(struct team *team) 2184 { 2185 struct sk_buff *skb; 2186 int err; 2187 struct net *net = dev_net(team->dev); 2188 2189 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 2190 if (!skb) 2191 return -ENOMEM; 2192 2193 err = team_nl_fill_port_list_get(skb, 0, 0, 0, team, false); 2194 if (err < 0) 2195 goto err_fill; 2196 2197 err = genlmsg_multicast_netns(net, skb, 0, team_change_event_mcgrp.id, 2198 GFP_KERNEL); 2199 return err; 2200 2201 err_fill: 2202 nlmsg_free(skb); 2203 return err; 2204 } 2205 2206 static int team_nl_init(void) 2207 { 2208 int err; 2209 2210 err = genl_register_family_with_ops(&team_nl_family, team_nl_ops, 2211 ARRAY_SIZE(team_nl_ops)); 2212 if (err) 2213 return err; 2214 2215 err = genl_register_mc_group(&team_nl_family, &team_change_event_mcgrp); 2216 if (err) 2217 goto err_change_event_grp_reg; 2218 2219 return 0; 2220 2221 err_change_event_grp_reg: 2222 genl_unregister_family(&team_nl_family); 2223 2224 return err; 2225 } 2226 2227 static void team_nl_fini(void) 2228 { 2229 genl_unregister_family(&team_nl_family); 2230 } 2231 2232 2233 /****************** 2234 * Change checkers 2235 ******************/ 2236 2237 static void __team_options_change_check(struct team *team) 2238 { 2239 int err; 2240 struct team_option_inst *opt_inst; 2241 LIST_HEAD(sel_opt_inst_list); 2242 2243 list_for_each_entry(opt_inst, &team->option_inst_list, list) { 2244 if (opt_inst->changed) 2245 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list); 2246 } 2247 err = team_nl_send_event_options_get(team, &sel_opt_inst_list); 2248 if (err) 2249 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n", 2250 err); 2251 } 2252 2253 /* rtnl lock is held */ 2254 static void __team_port_change_check(struct team_port *port, bool linkup) 2255 { 2256 int err; 2257 2258 if (!port->removed && port->state.linkup == linkup) 2259 return; 2260 2261 port->changed = true; 2262 port->state.linkup = linkup; 2263 team_refresh_port_linkup(port); 2264 if (linkup) { 2265 struct ethtool_cmd ecmd; 2266 2267 err = __ethtool_get_settings(port->dev, &ecmd); 2268 if (!err) { 2269 port->state.speed = ethtool_cmd_speed(&ecmd); 2270 port->state.duplex = ecmd.duplex; 2271 goto send_event; 2272 } 2273 } 2274 port->state.speed = 0; 2275 port->state.duplex = 0; 2276 2277 send_event: 2278 err = team_nl_send_event_port_list_get(port->team); 2279 if (err) 2280 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink\n", 2281 port->dev->name); 2282 2283 } 2284 2285 static void team_port_change_check(struct team_port *port, bool linkup) 2286 { 2287 struct team *team = port->team; 2288 2289 mutex_lock(&team->lock); 2290 __team_port_change_check(port, linkup); 2291 mutex_unlock(&team->lock); 2292 } 2293 2294 2295 /************************************ 2296 * Net device notifier event handler 2297 ************************************/ 2298 2299 static int team_device_event(struct notifier_block *unused, 2300 unsigned long event, void *ptr) 2301 { 2302 struct net_device *dev = (struct net_device *) ptr; 2303 struct team_port *port; 2304 2305 port = team_port_get_rtnl(dev); 2306 if (!port) 2307 return NOTIFY_DONE; 2308 2309 switch (event) { 2310 case NETDEV_UP: 2311 if (netif_carrier_ok(dev)) 2312 team_port_change_check(port, true); 2313 case NETDEV_DOWN: 2314 team_port_change_check(port, false); 2315 case NETDEV_CHANGE: 2316 if (netif_running(port->dev)) 2317 team_port_change_check(port, 2318 !!netif_carrier_ok(port->dev)); 2319 break; 2320 case NETDEV_UNREGISTER: 2321 team_del_slave(port->team->dev, dev); 2322 break; 2323 case NETDEV_FEAT_CHANGE: 2324 team_compute_features(port->team); 2325 break; 2326 case NETDEV_CHANGEMTU: 2327 /* Forbid to change mtu of underlaying device */ 2328 return NOTIFY_BAD; 2329 case NETDEV_PRE_TYPE_CHANGE: 2330 /* Forbid to change type of underlaying device */ 2331 return NOTIFY_BAD; 2332 } 2333 return NOTIFY_DONE; 2334 } 2335 2336 static struct notifier_block team_notifier_block __read_mostly = { 2337 .notifier_call = team_device_event, 2338 }; 2339 2340 2341 /*********************** 2342 * Module init and exit 2343 ***********************/ 2344 2345 static int __init team_module_init(void) 2346 { 2347 int err; 2348 2349 register_netdevice_notifier(&team_notifier_block); 2350 2351 err = rtnl_link_register(&team_link_ops); 2352 if (err) 2353 goto err_rtnl_reg; 2354 2355 err = team_nl_init(); 2356 if (err) 2357 goto err_nl_init; 2358 2359 return 0; 2360 2361 err_nl_init: 2362 rtnl_link_unregister(&team_link_ops); 2363 2364 err_rtnl_reg: 2365 unregister_netdevice_notifier(&team_notifier_block); 2366 2367 return err; 2368 } 2369 2370 static void __exit team_module_exit(void) 2371 { 2372 team_nl_fini(); 2373 rtnl_link_unregister(&team_link_ops); 2374 unregister_netdevice_notifier(&team_notifier_block); 2375 } 2376 2377 module_init(team_module_init); 2378 module_exit(team_module_exit); 2379 2380 MODULE_LICENSE("GPL v2"); 2381 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>"); 2382 MODULE_DESCRIPTION("Ethernet team device driver"); 2383 MODULE_ALIAS_RTNL_LINK(DRV_NAME); 2384