1 /* 2 * net/drivers/team/team.c - Network team device driver 3 * Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 */ 10 11 #include <linux/kernel.h> 12 #include <linux/types.h> 13 #include <linux/module.h> 14 #include <linux/init.h> 15 #include <linux/slab.h> 16 #include <linux/rcupdate.h> 17 #include <linux/errno.h> 18 #include <linux/ctype.h> 19 #include <linux/notifier.h> 20 #include <linux/netdevice.h> 21 #include <linux/if_vlan.h> 22 #include <linux/if_arp.h> 23 #include <linux/socket.h> 24 #include <linux/etherdevice.h> 25 #include <linux/rtnetlink.h> 26 #include <net/rtnetlink.h> 27 #include <net/genetlink.h> 28 #include <net/netlink.h> 29 #include <linux/if_team.h> 30 31 #define DRV_NAME "team" 32 33 34 /********** 35 * Helpers 36 **********/ 37 38 #define team_port_exists(dev) (dev->priv_flags & IFF_TEAM_PORT) 39 40 static struct team_port *team_port_get_rcu(const struct net_device *dev) 41 { 42 struct team_port *port = rcu_dereference(dev->rx_handler_data); 43 44 return team_port_exists(dev) ? port : NULL; 45 } 46 47 static struct team_port *team_port_get_rtnl(const struct net_device *dev) 48 { 49 struct team_port *port = rtnl_dereference(dev->rx_handler_data); 50 51 return team_port_exists(dev) ? port : NULL; 52 } 53 54 /* 55 * Since the ability to change mac address for open port device is tested in 56 * team_port_add, this function can be called without control of return value 57 */ 58 static int __set_port_mac(struct net_device *port_dev, 59 const unsigned char *dev_addr) 60 { 61 struct sockaddr addr; 62 63 memcpy(addr.sa_data, dev_addr, ETH_ALEN); 64 addr.sa_family = ARPHRD_ETHER; 65 return dev_set_mac_address(port_dev, &addr); 66 } 67 68 int team_port_set_orig_mac(struct team_port *port) 69 { 70 return __set_port_mac(port->dev, port->orig.dev_addr); 71 } 72 73 int team_port_set_team_mac(struct team_port *port) 74 { 75 return __set_port_mac(port->dev, port->team->dev->dev_addr); 76 } 77 EXPORT_SYMBOL(team_port_set_team_mac); 78 79 80 /******************* 81 * Options handling 82 *******************/ 83 84 struct team_option *__team_find_option(struct team *team, const char *opt_name) 85 { 86 struct team_option *option; 87 88 list_for_each_entry(option, &team->option_list, list) { 89 if (strcmp(option->name, opt_name) == 0) 90 return option; 91 } 92 return NULL; 93 } 94 95 int __team_options_register(struct team *team, 96 const struct team_option *option, 97 size_t option_count) 98 { 99 int i; 100 struct team_option **dst_opts; 101 int err; 102 103 dst_opts = kzalloc(sizeof(struct team_option *) * option_count, 104 GFP_KERNEL); 105 if (!dst_opts) 106 return -ENOMEM; 107 for (i = 0; i < option_count; i++, option++) { 108 if (__team_find_option(team, option->name)) { 109 err = -EEXIST; 110 goto rollback; 111 } 112 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL); 113 if (!dst_opts[i]) { 114 err = -ENOMEM; 115 goto rollback; 116 } 117 } 118 119 for (i = 0; i < option_count; i++) { 120 dst_opts[i]->changed = true; 121 dst_opts[i]->removed = false; 122 list_add_tail(&dst_opts[i]->list, &team->option_list); 123 } 124 125 kfree(dst_opts); 126 return 0; 127 128 rollback: 129 for (i = 0; i < option_count; i++) 130 kfree(dst_opts[i]); 131 132 kfree(dst_opts); 133 return err; 134 } 135 136 static void __team_options_mark_removed(struct team *team, 137 const struct team_option *option, 138 size_t option_count) 139 { 140 int i; 141 142 for (i = 0; i < option_count; i++, option++) { 143 struct team_option *del_opt; 144 145 del_opt = __team_find_option(team, option->name); 146 if (del_opt) { 147 del_opt->changed = true; 148 del_opt->removed = true; 149 } 150 } 151 } 152 153 static void __team_options_unregister(struct team *team, 154 const struct team_option *option, 155 size_t option_count) 156 { 157 int i; 158 159 for (i = 0; i < option_count; i++, option++) { 160 struct team_option *del_opt; 161 162 del_opt = __team_find_option(team, option->name); 163 if (del_opt) { 164 list_del(&del_opt->list); 165 kfree(del_opt); 166 } 167 } 168 } 169 170 static void __team_options_change_check(struct team *team); 171 172 int team_options_register(struct team *team, 173 const struct team_option *option, 174 size_t option_count) 175 { 176 int err; 177 178 err = __team_options_register(team, option, option_count); 179 if (err) 180 return err; 181 __team_options_change_check(team); 182 return 0; 183 } 184 EXPORT_SYMBOL(team_options_register); 185 186 void team_options_unregister(struct team *team, 187 const struct team_option *option, 188 size_t option_count) 189 { 190 __team_options_mark_removed(team, option, option_count); 191 __team_options_change_check(team); 192 __team_options_unregister(team, option, option_count); 193 } 194 EXPORT_SYMBOL(team_options_unregister); 195 196 static int team_option_get(struct team *team, struct team_option *option, 197 void *arg) 198 { 199 return option->getter(team, arg); 200 } 201 202 static int team_option_set(struct team *team, struct team_option *option, 203 void *arg) 204 { 205 int err; 206 207 err = option->setter(team, arg); 208 if (err) 209 return err; 210 211 option->changed = true; 212 __team_options_change_check(team); 213 return err; 214 } 215 216 /**************** 217 * Mode handling 218 ****************/ 219 220 static LIST_HEAD(mode_list); 221 static DEFINE_SPINLOCK(mode_list_lock); 222 223 static struct team_mode *__find_mode(const char *kind) 224 { 225 struct team_mode *mode; 226 227 list_for_each_entry(mode, &mode_list, list) { 228 if (strcmp(mode->kind, kind) == 0) 229 return mode; 230 } 231 return NULL; 232 } 233 234 static bool is_good_mode_name(const char *name) 235 { 236 while (*name != '\0') { 237 if (!isalpha(*name) && !isdigit(*name) && *name != '_') 238 return false; 239 name++; 240 } 241 return true; 242 } 243 244 int team_mode_register(struct team_mode *mode) 245 { 246 int err = 0; 247 248 if (!is_good_mode_name(mode->kind) || 249 mode->priv_size > TEAM_MODE_PRIV_SIZE) 250 return -EINVAL; 251 spin_lock(&mode_list_lock); 252 if (__find_mode(mode->kind)) { 253 err = -EEXIST; 254 goto unlock; 255 } 256 list_add_tail(&mode->list, &mode_list); 257 unlock: 258 spin_unlock(&mode_list_lock); 259 return err; 260 } 261 EXPORT_SYMBOL(team_mode_register); 262 263 int team_mode_unregister(struct team_mode *mode) 264 { 265 spin_lock(&mode_list_lock); 266 list_del_init(&mode->list); 267 spin_unlock(&mode_list_lock); 268 return 0; 269 } 270 EXPORT_SYMBOL(team_mode_unregister); 271 272 static struct team_mode *team_mode_get(const char *kind) 273 { 274 struct team_mode *mode; 275 276 spin_lock(&mode_list_lock); 277 mode = __find_mode(kind); 278 if (!mode) { 279 spin_unlock(&mode_list_lock); 280 request_module("team-mode-%s", kind); 281 spin_lock(&mode_list_lock); 282 mode = __find_mode(kind); 283 } 284 if (mode) 285 if (!try_module_get(mode->owner)) 286 mode = NULL; 287 288 spin_unlock(&mode_list_lock); 289 return mode; 290 } 291 292 static void team_mode_put(const struct team_mode *mode) 293 { 294 module_put(mode->owner); 295 } 296 297 static bool team_dummy_transmit(struct team *team, struct sk_buff *skb) 298 { 299 dev_kfree_skb_any(skb); 300 return false; 301 } 302 303 rx_handler_result_t team_dummy_receive(struct team *team, 304 struct team_port *port, 305 struct sk_buff *skb) 306 { 307 return RX_HANDLER_ANOTHER; 308 } 309 310 static void team_adjust_ops(struct team *team) 311 { 312 /* 313 * To avoid checks in rx/tx skb paths, ensure here that non-null and 314 * correct ops are always set. 315 */ 316 317 if (list_empty(&team->port_list) || 318 !team->mode || !team->mode->ops->transmit) 319 team->ops.transmit = team_dummy_transmit; 320 else 321 team->ops.transmit = team->mode->ops->transmit; 322 323 if (list_empty(&team->port_list) || 324 !team->mode || !team->mode->ops->receive) 325 team->ops.receive = team_dummy_receive; 326 else 327 team->ops.receive = team->mode->ops->receive; 328 } 329 330 /* 331 * We can benefit from the fact that it's ensured no port is present 332 * at the time of mode change. Therefore no packets are in fly so there's no 333 * need to set mode operations in any special way. 334 */ 335 static int __team_change_mode(struct team *team, 336 const struct team_mode *new_mode) 337 { 338 /* Check if mode was previously set and do cleanup if so */ 339 if (team->mode) { 340 void (*exit_op)(struct team *team) = team->ops.exit; 341 342 /* Clear ops area so no callback is called any longer */ 343 memset(&team->ops, 0, sizeof(struct team_mode_ops)); 344 team_adjust_ops(team); 345 346 if (exit_op) 347 exit_op(team); 348 team_mode_put(team->mode); 349 team->mode = NULL; 350 /* zero private data area */ 351 memset(&team->mode_priv, 0, 352 sizeof(struct team) - offsetof(struct team, mode_priv)); 353 } 354 355 if (!new_mode) 356 return 0; 357 358 if (new_mode->ops->init) { 359 int err; 360 361 err = new_mode->ops->init(team); 362 if (err) 363 return err; 364 } 365 366 team->mode = new_mode; 367 memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops)); 368 team_adjust_ops(team); 369 370 return 0; 371 } 372 373 static int team_change_mode(struct team *team, const char *kind) 374 { 375 struct team_mode *new_mode; 376 struct net_device *dev = team->dev; 377 int err; 378 379 if (!list_empty(&team->port_list)) { 380 netdev_err(dev, "No ports can be present during mode change\n"); 381 return -EBUSY; 382 } 383 384 if (team->mode && strcmp(team->mode->kind, kind) == 0) { 385 netdev_err(dev, "Unable to change to the same mode the team is in\n"); 386 return -EINVAL; 387 } 388 389 new_mode = team_mode_get(kind); 390 if (!new_mode) { 391 netdev_err(dev, "Mode \"%s\" not found\n", kind); 392 return -EINVAL; 393 } 394 395 err = __team_change_mode(team, new_mode); 396 if (err) { 397 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind); 398 team_mode_put(new_mode); 399 return err; 400 } 401 402 netdev_info(dev, "Mode changed to \"%s\"\n", kind); 403 return 0; 404 } 405 406 407 /************************ 408 * Rx path frame handler 409 ************************/ 410 411 /* note: already called with rcu_read_lock */ 412 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb) 413 { 414 struct sk_buff *skb = *pskb; 415 struct team_port *port; 416 struct team *team; 417 rx_handler_result_t res; 418 419 skb = skb_share_check(skb, GFP_ATOMIC); 420 if (!skb) 421 return RX_HANDLER_CONSUMED; 422 423 *pskb = skb; 424 425 port = team_port_get_rcu(skb->dev); 426 team = port->team; 427 428 res = team->ops.receive(team, port, skb); 429 if (res == RX_HANDLER_ANOTHER) { 430 struct team_pcpu_stats *pcpu_stats; 431 432 pcpu_stats = this_cpu_ptr(team->pcpu_stats); 433 u64_stats_update_begin(&pcpu_stats->syncp); 434 pcpu_stats->rx_packets++; 435 pcpu_stats->rx_bytes += skb->len; 436 if (skb->pkt_type == PACKET_MULTICAST) 437 pcpu_stats->rx_multicast++; 438 u64_stats_update_end(&pcpu_stats->syncp); 439 440 skb->dev = team->dev; 441 } else { 442 this_cpu_inc(team->pcpu_stats->rx_dropped); 443 } 444 445 return res; 446 } 447 448 449 /**************** 450 * Port handling 451 ****************/ 452 453 static bool team_port_find(const struct team *team, 454 const struct team_port *port) 455 { 456 struct team_port *cur; 457 458 list_for_each_entry(cur, &team->port_list, list) 459 if (cur == port) 460 return true; 461 return false; 462 } 463 464 /* 465 * Add/delete port to the team port list. Write guarded by rtnl_lock. 466 * Takes care of correct port->index setup (might be racy). 467 */ 468 static void team_port_list_add_port(struct team *team, 469 struct team_port *port) 470 { 471 port->index = team->port_count++; 472 hlist_add_head_rcu(&port->hlist, 473 team_port_index_hash(team, port->index)); 474 list_add_tail_rcu(&port->list, &team->port_list); 475 } 476 477 static void __reconstruct_port_hlist(struct team *team, int rm_index) 478 { 479 int i; 480 struct team_port *port; 481 482 for (i = rm_index + 1; i < team->port_count; i++) { 483 port = team_get_port_by_index(team, i); 484 hlist_del_rcu(&port->hlist); 485 port->index--; 486 hlist_add_head_rcu(&port->hlist, 487 team_port_index_hash(team, port->index)); 488 } 489 } 490 491 static void team_port_list_del_port(struct team *team, 492 struct team_port *port) 493 { 494 int rm_index = port->index; 495 496 hlist_del_rcu(&port->hlist); 497 list_del_rcu(&port->list); 498 __reconstruct_port_hlist(team, rm_index); 499 team->port_count--; 500 } 501 502 #define TEAM_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \ 503 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \ 504 NETIF_F_HIGHDMA | NETIF_F_LRO) 505 506 static void __team_compute_features(struct team *team) 507 { 508 struct team_port *port; 509 u32 vlan_features = TEAM_VLAN_FEATURES; 510 unsigned short max_hard_header_len = ETH_HLEN; 511 512 list_for_each_entry(port, &team->port_list, list) { 513 vlan_features = netdev_increment_features(vlan_features, 514 port->dev->vlan_features, 515 TEAM_VLAN_FEATURES); 516 517 if (port->dev->hard_header_len > max_hard_header_len) 518 max_hard_header_len = port->dev->hard_header_len; 519 } 520 521 team->dev->vlan_features = vlan_features; 522 team->dev->hard_header_len = max_hard_header_len; 523 524 netdev_change_features(team->dev); 525 } 526 527 static void team_compute_features(struct team *team) 528 { 529 mutex_lock(&team->lock); 530 __team_compute_features(team); 531 mutex_unlock(&team->lock); 532 } 533 534 static int team_port_enter(struct team *team, struct team_port *port) 535 { 536 int err = 0; 537 538 dev_hold(team->dev); 539 port->dev->priv_flags |= IFF_TEAM_PORT; 540 if (team->ops.port_enter) { 541 err = team->ops.port_enter(team, port); 542 if (err) { 543 netdev_err(team->dev, "Device %s failed to enter team mode\n", 544 port->dev->name); 545 goto err_port_enter; 546 } 547 } 548 549 return 0; 550 551 err_port_enter: 552 port->dev->priv_flags &= ~IFF_TEAM_PORT; 553 dev_put(team->dev); 554 555 return err; 556 } 557 558 static void team_port_leave(struct team *team, struct team_port *port) 559 { 560 if (team->ops.port_leave) 561 team->ops.port_leave(team, port); 562 port->dev->priv_flags &= ~IFF_TEAM_PORT; 563 dev_put(team->dev); 564 } 565 566 static void __team_port_change_check(struct team_port *port, bool linkup); 567 568 static int team_port_add(struct team *team, struct net_device *port_dev) 569 { 570 struct net_device *dev = team->dev; 571 struct team_port *port; 572 char *portname = port_dev->name; 573 int err; 574 575 if (port_dev->flags & IFF_LOOPBACK || 576 port_dev->type != ARPHRD_ETHER) { 577 netdev_err(dev, "Device %s is of an unsupported type\n", 578 portname); 579 return -EINVAL; 580 } 581 582 if (team_port_exists(port_dev)) { 583 netdev_err(dev, "Device %s is already a port " 584 "of a team device\n", portname); 585 return -EBUSY; 586 } 587 588 if (port_dev->flags & IFF_UP) { 589 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n", 590 portname); 591 return -EBUSY; 592 } 593 594 port = kzalloc(sizeof(struct team_port), GFP_KERNEL); 595 if (!port) 596 return -ENOMEM; 597 598 port->dev = port_dev; 599 port->team = team; 600 601 port->orig.mtu = port_dev->mtu; 602 err = dev_set_mtu(port_dev, dev->mtu); 603 if (err) { 604 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err); 605 goto err_set_mtu; 606 } 607 608 memcpy(port->orig.dev_addr, port_dev->dev_addr, ETH_ALEN); 609 610 err = team_port_enter(team, port); 611 if (err) { 612 netdev_err(dev, "Device %s failed to enter team mode\n", 613 portname); 614 goto err_port_enter; 615 } 616 617 err = dev_open(port_dev); 618 if (err) { 619 netdev_dbg(dev, "Device %s opening failed\n", 620 portname); 621 goto err_dev_open; 622 } 623 624 err = vlan_vids_add_by_dev(port_dev, dev); 625 if (err) { 626 netdev_err(dev, "Failed to add vlan ids to device %s\n", 627 portname); 628 goto err_vids_add; 629 } 630 631 err = netdev_set_master(port_dev, dev); 632 if (err) { 633 netdev_err(dev, "Device %s failed to set master\n", portname); 634 goto err_set_master; 635 } 636 637 err = netdev_rx_handler_register(port_dev, team_handle_frame, 638 port); 639 if (err) { 640 netdev_err(dev, "Device %s failed to register rx_handler\n", 641 portname); 642 goto err_handler_register; 643 } 644 645 team_port_list_add_port(team, port); 646 team_adjust_ops(team); 647 __team_compute_features(team); 648 __team_port_change_check(port, !!netif_carrier_ok(port_dev)); 649 650 netdev_info(dev, "Port device %s added\n", portname); 651 652 return 0; 653 654 err_handler_register: 655 netdev_set_master(port_dev, NULL); 656 657 err_set_master: 658 vlan_vids_del_by_dev(port_dev, dev); 659 660 err_vids_add: 661 dev_close(port_dev); 662 663 err_dev_open: 664 team_port_leave(team, port); 665 team_port_set_orig_mac(port); 666 667 err_port_enter: 668 dev_set_mtu(port_dev, port->orig.mtu); 669 670 err_set_mtu: 671 kfree(port); 672 673 return err; 674 } 675 676 static int team_port_del(struct team *team, struct net_device *port_dev) 677 { 678 struct net_device *dev = team->dev; 679 struct team_port *port; 680 char *portname = port_dev->name; 681 682 port = team_port_get_rtnl(port_dev); 683 if (!port || !team_port_find(team, port)) { 684 netdev_err(dev, "Device %s does not act as a port of this team\n", 685 portname); 686 return -ENOENT; 687 } 688 689 port->removed = true; 690 __team_port_change_check(port, false); 691 team_port_list_del_port(team, port); 692 team_adjust_ops(team); 693 netdev_rx_handler_unregister(port_dev); 694 netdev_set_master(port_dev, NULL); 695 vlan_vids_del_by_dev(port_dev, dev); 696 dev_close(port_dev); 697 team_port_leave(team, port); 698 team_port_set_orig_mac(port); 699 dev_set_mtu(port_dev, port->orig.mtu); 700 synchronize_rcu(); 701 kfree(port); 702 netdev_info(dev, "Port device %s removed\n", portname); 703 __team_compute_features(team); 704 705 return 0; 706 } 707 708 709 /***************** 710 * Net device ops 711 *****************/ 712 713 static const char team_no_mode_kind[] = "*NOMODE*"; 714 715 static int team_mode_option_get(struct team *team, void *arg) 716 { 717 const char **str = arg; 718 719 *str = team->mode ? team->mode->kind : team_no_mode_kind; 720 return 0; 721 } 722 723 static int team_mode_option_set(struct team *team, void *arg) 724 { 725 const char **str = arg; 726 727 return team_change_mode(team, *str); 728 } 729 730 static const struct team_option team_options[] = { 731 { 732 .name = "mode", 733 .type = TEAM_OPTION_TYPE_STRING, 734 .getter = team_mode_option_get, 735 .setter = team_mode_option_set, 736 }, 737 }; 738 739 static int team_init(struct net_device *dev) 740 { 741 struct team *team = netdev_priv(dev); 742 int i; 743 int err; 744 745 team->dev = dev; 746 mutex_init(&team->lock); 747 748 team->pcpu_stats = alloc_percpu(struct team_pcpu_stats); 749 if (!team->pcpu_stats) 750 return -ENOMEM; 751 752 for (i = 0; i < TEAM_PORT_HASHENTRIES; i++) 753 INIT_HLIST_HEAD(&team->port_hlist[i]); 754 INIT_LIST_HEAD(&team->port_list); 755 756 team_adjust_ops(team); 757 758 INIT_LIST_HEAD(&team->option_list); 759 err = team_options_register(team, team_options, ARRAY_SIZE(team_options)); 760 if (err) 761 goto err_options_register; 762 netif_carrier_off(dev); 763 764 return 0; 765 766 err_options_register: 767 free_percpu(team->pcpu_stats); 768 769 return err; 770 } 771 772 static void team_uninit(struct net_device *dev) 773 { 774 struct team *team = netdev_priv(dev); 775 struct team_port *port; 776 struct team_port *tmp; 777 778 mutex_lock(&team->lock); 779 list_for_each_entry_safe(port, tmp, &team->port_list, list) 780 team_port_del(team, port->dev); 781 782 __team_change_mode(team, NULL); /* cleanup */ 783 __team_options_unregister(team, team_options, ARRAY_SIZE(team_options)); 784 mutex_unlock(&team->lock); 785 } 786 787 static void team_destructor(struct net_device *dev) 788 { 789 struct team *team = netdev_priv(dev); 790 791 free_percpu(team->pcpu_stats); 792 free_netdev(dev); 793 } 794 795 static int team_open(struct net_device *dev) 796 { 797 netif_carrier_on(dev); 798 return 0; 799 } 800 801 static int team_close(struct net_device *dev) 802 { 803 netif_carrier_off(dev); 804 return 0; 805 } 806 807 /* 808 * note: already called with rcu_read_lock 809 */ 810 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev) 811 { 812 struct team *team = netdev_priv(dev); 813 bool tx_success = false; 814 unsigned int len = skb->len; 815 816 tx_success = team->ops.transmit(team, skb); 817 if (tx_success) { 818 struct team_pcpu_stats *pcpu_stats; 819 820 pcpu_stats = this_cpu_ptr(team->pcpu_stats); 821 u64_stats_update_begin(&pcpu_stats->syncp); 822 pcpu_stats->tx_packets++; 823 pcpu_stats->tx_bytes += len; 824 u64_stats_update_end(&pcpu_stats->syncp); 825 } else { 826 this_cpu_inc(team->pcpu_stats->tx_dropped); 827 } 828 829 return NETDEV_TX_OK; 830 } 831 832 static void team_change_rx_flags(struct net_device *dev, int change) 833 { 834 struct team *team = netdev_priv(dev); 835 struct team_port *port; 836 int inc; 837 838 rcu_read_lock(); 839 list_for_each_entry_rcu(port, &team->port_list, list) { 840 if (change & IFF_PROMISC) { 841 inc = dev->flags & IFF_PROMISC ? 1 : -1; 842 dev_set_promiscuity(port->dev, inc); 843 } 844 if (change & IFF_ALLMULTI) { 845 inc = dev->flags & IFF_ALLMULTI ? 1 : -1; 846 dev_set_allmulti(port->dev, inc); 847 } 848 } 849 rcu_read_unlock(); 850 } 851 852 static void team_set_rx_mode(struct net_device *dev) 853 { 854 struct team *team = netdev_priv(dev); 855 struct team_port *port; 856 857 rcu_read_lock(); 858 list_for_each_entry_rcu(port, &team->port_list, list) { 859 dev_uc_sync(port->dev, dev); 860 dev_mc_sync(port->dev, dev); 861 } 862 rcu_read_unlock(); 863 } 864 865 static int team_set_mac_address(struct net_device *dev, void *p) 866 { 867 struct team *team = netdev_priv(dev); 868 struct team_port *port; 869 struct sockaddr *addr = p; 870 871 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); 872 rcu_read_lock(); 873 list_for_each_entry_rcu(port, &team->port_list, list) 874 if (team->ops.port_change_mac) 875 team->ops.port_change_mac(team, port); 876 rcu_read_unlock(); 877 return 0; 878 } 879 880 static int team_change_mtu(struct net_device *dev, int new_mtu) 881 { 882 struct team *team = netdev_priv(dev); 883 struct team_port *port; 884 int err; 885 886 /* 887 * Alhough this is reader, it's guarded by team lock. It's not possible 888 * to traverse list in reverse under rcu_read_lock 889 */ 890 mutex_lock(&team->lock); 891 list_for_each_entry(port, &team->port_list, list) { 892 err = dev_set_mtu(port->dev, new_mtu); 893 if (err) { 894 netdev_err(dev, "Device %s failed to change mtu", 895 port->dev->name); 896 goto unwind; 897 } 898 } 899 mutex_unlock(&team->lock); 900 901 dev->mtu = new_mtu; 902 903 return 0; 904 905 unwind: 906 list_for_each_entry_continue_reverse(port, &team->port_list, list) 907 dev_set_mtu(port->dev, dev->mtu); 908 mutex_unlock(&team->lock); 909 910 return err; 911 } 912 913 static struct rtnl_link_stats64 * 914 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) 915 { 916 struct team *team = netdev_priv(dev); 917 struct team_pcpu_stats *p; 918 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes; 919 u32 rx_dropped = 0, tx_dropped = 0; 920 unsigned int start; 921 int i; 922 923 for_each_possible_cpu(i) { 924 p = per_cpu_ptr(team->pcpu_stats, i); 925 do { 926 start = u64_stats_fetch_begin_bh(&p->syncp); 927 rx_packets = p->rx_packets; 928 rx_bytes = p->rx_bytes; 929 rx_multicast = p->rx_multicast; 930 tx_packets = p->tx_packets; 931 tx_bytes = p->tx_bytes; 932 } while (u64_stats_fetch_retry_bh(&p->syncp, start)); 933 934 stats->rx_packets += rx_packets; 935 stats->rx_bytes += rx_bytes; 936 stats->multicast += rx_multicast; 937 stats->tx_packets += tx_packets; 938 stats->tx_bytes += tx_bytes; 939 /* 940 * rx_dropped & tx_dropped are u32, updated 941 * without syncp protection. 942 */ 943 rx_dropped += p->rx_dropped; 944 tx_dropped += p->tx_dropped; 945 } 946 stats->rx_dropped = rx_dropped; 947 stats->tx_dropped = tx_dropped; 948 return stats; 949 } 950 951 static int team_vlan_rx_add_vid(struct net_device *dev, uint16_t vid) 952 { 953 struct team *team = netdev_priv(dev); 954 struct team_port *port; 955 int err; 956 957 /* 958 * Alhough this is reader, it's guarded by team lock. It's not possible 959 * to traverse list in reverse under rcu_read_lock 960 */ 961 mutex_lock(&team->lock); 962 list_for_each_entry(port, &team->port_list, list) { 963 err = vlan_vid_add(port->dev, vid); 964 if (err) 965 goto unwind; 966 } 967 mutex_unlock(&team->lock); 968 969 return 0; 970 971 unwind: 972 list_for_each_entry_continue_reverse(port, &team->port_list, list) 973 vlan_vid_del(port->dev, vid); 974 mutex_unlock(&team->lock); 975 976 return err; 977 } 978 979 static int team_vlan_rx_kill_vid(struct net_device *dev, uint16_t vid) 980 { 981 struct team *team = netdev_priv(dev); 982 struct team_port *port; 983 984 rcu_read_lock(); 985 list_for_each_entry_rcu(port, &team->port_list, list) 986 vlan_vid_del(port->dev, vid); 987 rcu_read_unlock(); 988 989 return 0; 990 } 991 992 static int team_add_slave(struct net_device *dev, struct net_device *port_dev) 993 { 994 struct team *team = netdev_priv(dev); 995 int err; 996 997 mutex_lock(&team->lock); 998 err = team_port_add(team, port_dev); 999 mutex_unlock(&team->lock); 1000 return err; 1001 } 1002 1003 static int team_del_slave(struct net_device *dev, struct net_device *port_dev) 1004 { 1005 struct team *team = netdev_priv(dev); 1006 int err; 1007 1008 mutex_lock(&team->lock); 1009 err = team_port_del(team, port_dev); 1010 mutex_unlock(&team->lock); 1011 return err; 1012 } 1013 1014 static netdev_features_t team_fix_features(struct net_device *dev, 1015 netdev_features_t features) 1016 { 1017 struct team_port *port; 1018 struct team *team = netdev_priv(dev); 1019 netdev_features_t mask; 1020 1021 mask = features; 1022 features &= ~NETIF_F_ONE_FOR_ALL; 1023 features |= NETIF_F_ALL_FOR_ALL; 1024 1025 rcu_read_lock(); 1026 list_for_each_entry_rcu(port, &team->port_list, list) { 1027 features = netdev_increment_features(features, 1028 port->dev->features, 1029 mask); 1030 } 1031 rcu_read_unlock(); 1032 return features; 1033 } 1034 1035 static const struct net_device_ops team_netdev_ops = { 1036 .ndo_init = team_init, 1037 .ndo_uninit = team_uninit, 1038 .ndo_open = team_open, 1039 .ndo_stop = team_close, 1040 .ndo_start_xmit = team_xmit, 1041 .ndo_change_rx_flags = team_change_rx_flags, 1042 .ndo_set_rx_mode = team_set_rx_mode, 1043 .ndo_set_mac_address = team_set_mac_address, 1044 .ndo_change_mtu = team_change_mtu, 1045 .ndo_get_stats64 = team_get_stats64, 1046 .ndo_vlan_rx_add_vid = team_vlan_rx_add_vid, 1047 .ndo_vlan_rx_kill_vid = team_vlan_rx_kill_vid, 1048 .ndo_add_slave = team_add_slave, 1049 .ndo_del_slave = team_del_slave, 1050 .ndo_fix_features = team_fix_features, 1051 }; 1052 1053 1054 /*********************** 1055 * rt netlink interface 1056 ***********************/ 1057 1058 static void team_setup(struct net_device *dev) 1059 { 1060 ether_setup(dev); 1061 1062 dev->netdev_ops = &team_netdev_ops; 1063 dev->destructor = team_destructor; 1064 dev->tx_queue_len = 0; 1065 dev->flags |= IFF_MULTICAST; 1066 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); 1067 1068 /* 1069 * Indicate we support unicast address filtering. That way core won't 1070 * bring us to promisc mode in case a unicast addr is added. 1071 * Let this up to underlay drivers. 1072 */ 1073 dev->priv_flags |= IFF_UNICAST_FLT; 1074 1075 dev->features |= NETIF_F_LLTX; 1076 dev->features |= NETIF_F_GRO; 1077 dev->hw_features = NETIF_F_HW_VLAN_TX | 1078 NETIF_F_HW_VLAN_RX | 1079 NETIF_F_HW_VLAN_FILTER; 1080 1081 dev->features |= dev->hw_features; 1082 } 1083 1084 static int team_newlink(struct net *src_net, struct net_device *dev, 1085 struct nlattr *tb[], struct nlattr *data[]) 1086 { 1087 int err; 1088 1089 if (tb[IFLA_ADDRESS] == NULL) 1090 random_ether_addr(dev->dev_addr); 1091 1092 err = register_netdevice(dev); 1093 if (err) 1094 return err; 1095 1096 return 0; 1097 } 1098 1099 static int team_validate(struct nlattr *tb[], struct nlattr *data[]) 1100 { 1101 if (tb[IFLA_ADDRESS]) { 1102 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) 1103 return -EINVAL; 1104 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) 1105 return -EADDRNOTAVAIL; 1106 } 1107 return 0; 1108 } 1109 1110 static struct rtnl_link_ops team_link_ops __read_mostly = { 1111 .kind = DRV_NAME, 1112 .priv_size = sizeof(struct team), 1113 .setup = team_setup, 1114 .newlink = team_newlink, 1115 .validate = team_validate, 1116 }; 1117 1118 1119 /*********************************** 1120 * Generic netlink custom interface 1121 ***********************************/ 1122 1123 static struct genl_family team_nl_family = { 1124 .id = GENL_ID_GENERATE, 1125 .name = TEAM_GENL_NAME, 1126 .version = TEAM_GENL_VERSION, 1127 .maxattr = TEAM_ATTR_MAX, 1128 .netnsok = true, 1129 }; 1130 1131 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = { 1132 [TEAM_ATTR_UNSPEC] = { .type = NLA_UNSPEC, }, 1133 [TEAM_ATTR_TEAM_IFINDEX] = { .type = NLA_U32 }, 1134 [TEAM_ATTR_LIST_OPTION] = { .type = NLA_NESTED }, 1135 [TEAM_ATTR_LIST_PORT] = { .type = NLA_NESTED }, 1136 }; 1137 1138 static const struct nla_policy 1139 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = { 1140 [TEAM_ATTR_OPTION_UNSPEC] = { .type = NLA_UNSPEC, }, 1141 [TEAM_ATTR_OPTION_NAME] = { 1142 .type = NLA_STRING, 1143 .len = TEAM_STRING_MAX_LEN, 1144 }, 1145 [TEAM_ATTR_OPTION_CHANGED] = { .type = NLA_FLAG }, 1146 [TEAM_ATTR_OPTION_TYPE] = { .type = NLA_U8 }, 1147 [TEAM_ATTR_OPTION_DATA] = { 1148 .type = NLA_BINARY, 1149 .len = TEAM_STRING_MAX_LEN, 1150 }, 1151 }; 1152 1153 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info) 1154 { 1155 struct sk_buff *msg; 1156 void *hdr; 1157 int err; 1158 1159 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); 1160 if (!msg) 1161 return -ENOMEM; 1162 1163 hdr = genlmsg_put(msg, info->snd_pid, info->snd_seq, 1164 &team_nl_family, 0, TEAM_CMD_NOOP); 1165 if (IS_ERR(hdr)) { 1166 err = PTR_ERR(hdr); 1167 goto err_msg_put; 1168 } 1169 1170 genlmsg_end(msg, hdr); 1171 1172 return genlmsg_unicast(genl_info_net(info), msg, info->snd_pid); 1173 1174 err_msg_put: 1175 nlmsg_free(msg); 1176 1177 return err; 1178 } 1179 1180 /* 1181 * Netlink cmd functions should be locked by following two functions. 1182 * Since dev gets held here, that ensures dev won't disappear in between. 1183 */ 1184 static struct team *team_nl_team_get(struct genl_info *info) 1185 { 1186 struct net *net = genl_info_net(info); 1187 int ifindex; 1188 struct net_device *dev; 1189 struct team *team; 1190 1191 if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX]) 1192 return NULL; 1193 1194 ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]); 1195 dev = dev_get_by_index(net, ifindex); 1196 if (!dev || dev->netdev_ops != &team_netdev_ops) { 1197 if (dev) 1198 dev_put(dev); 1199 return NULL; 1200 } 1201 1202 team = netdev_priv(dev); 1203 mutex_lock(&team->lock); 1204 return team; 1205 } 1206 1207 static void team_nl_team_put(struct team *team) 1208 { 1209 mutex_unlock(&team->lock); 1210 dev_put(team->dev); 1211 } 1212 1213 static int team_nl_send_generic(struct genl_info *info, struct team *team, 1214 int (*fill_func)(struct sk_buff *skb, 1215 struct genl_info *info, 1216 int flags, struct team *team)) 1217 { 1218 struct sk_buff *skb; 1219 int err; 1220 1221 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); 1222 if (!skb) 1223 return -ENOMEM; 1224 1225 err = fill_func(skb, info, NLM_F_ACK, team); 1226 if (err < 0) 1227 goto err_fill; 1228 1229 err = genlmsg_unicast(genl_info_net(info), skb, info->snd_pid); 1230 return err; 1231 1232 err_fill: 1233 nlmsg_free(skb); 1234 return err; 1235 } 1236 1237 static int team_nl_fill_options_get(struct sk_buff *skb, 1238 u32 pid, u32 seq, int flags, 1239 struct team *team, bool fillall) 1240 { 1241 struct nlattr *option_list; 1242 void *hdr; 1243 struct team_option *option; 1244 1245 hdr = genlmsg_put(skb, pid, seq, &team_nl_family, flags, 1246 TEAM_CMD_OPTIONS_GET); 1247 if (IS_ERR(hdr)) 1248 return PTR_ERR(hdr); 1249 1250 NLA_PUT_U32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex); 1251 option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION); 1252 if (!option_list) 1253 return -EMSGSIZE; 1254 1255 list_for_each_entry(option, &team->option_list, list) { 1256 struct nlattr *option_item; 1257 long arg; 1258 1259 /* Include only changed options if fill all mode is not on */ 1260 if (!fillall && !option->changed) 1261 continue; 1262 option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION); 1263 if (!option_item) 1264 goto nla_put_failure; 1265 NLA_PUT_STRING(skb, TEAM_ATTR_OPTION_NAME, option->name); 1266 if (option->changed) { 1267 NLA_PUT_FLAG(skb, TEAM_ATTR_OPTION_CHANGED); 1268 option->changed = false; 1269 } 1270 if (option->removed) 1271 NLA_PUT_FLAG(skb, TEAM_ATTR_OPTION_REMOVED); 1272 switch (option->type) { 1273 case TEAM_OPTION_TYPE_U32: 1274 NLA_PUT_U8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32); 1275 team_option_get(team, option, &arg); 1276 NLA_PUT_U32(skb, TEAM_ATTR_OPTION_DATA, arg); 1277 break; 1278 case TEAM_OPTION_TYPE_STRING: 1279 NLA_PUT_U8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING); 1280 team_option_get(team, option, &arg); 1281 NLA_PUT_STRING(skb, TEAM_ATTR_OPTION_DATA, 1282 (char *) arg); 1283 break; 1284 default: 1285 BUG(); 1286 } 1287 nla_nest_end(skb, option_item); 1288 } 1289 1290 nla_nest_end(skb, option_list); 1291 return genlmsg_end(skb, hdr); 1292 1293 nla_put_failure: 1294 genlmsg_cancel(skb, hdr); 1295 return -EMSGSIZE; 1296 } 1297 1298 static int team_nl_fill_options_get_all(struct sk_buff *skb, 1299 struct genl_info *info, int flags, 1300 struct team *team) 1301 { 1302 return team_nl_fill_options_get(skb, info->snd_pid, 1303 info->snd_seq, NLM_F_ACK, 1304 team, true); 1305 } 1306 1307 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info) 1308 { 1309 struct team *team; 1310 int err; 1311 1312 team = team_nl_team_get(info); 1313 if (!team) 1314 return -EINVAL; 1315 1316 err = team_nl_send_generic(info, team, team_nl_fill_options_get_all); 1317 1318 team_nl_team_put(team); 1319 1320 return err; 1321 } 1322 1323 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info) 1324 { 1325 struct team *team; 1326 int err = 0; 1327 int i; 1328 struct nlattr *nl_option; 1329 1330 team = team_nl_team_get(info); 1331 if (!team) 1332 return -EINVAL; 1333 1334 err = -EINVAL; 1335 if (!info->attrs[TEAM_ATTR_LIST_OPTION]) { 1336 err = -EINVAL; 1337 goto team_put; 1338 } 1339 1340 nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) { 1341 struct nlattr *mode_attrs[TEAM_ATTR_OPTION_MAX + 1]; 1342 enum team_option_type opt_type; 1343 struct team_option *option; 1344 char *opt_name; 1345 bool opt_found = false; 1346 1347 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) { 1348 err = -EINVAL; 1349 goto team_put; 1350 } 1351 err = nla_parse_nested(mode_attrs, TEAM_ATTR_OPTION_MAX, 1352 nl_option, team_nl_option_policy); 1353 if (err) 1354 goto team_put; 1355 if (!mode_attrs[TEAM_ATTR_OPTION_NAME] || 1356 !mode_attrs[TEAM_ATTR_OPTION_TYPE] || 1357 !mode_attrs[TEAM_ATTR_OPTION_DATA]) { 1358 err = -EINVAL; 1359 goto team_put; 1360 } 1361 switch (nla_get_u8(mode_attrs[TEAM_ATTR_OPTION_TYPE])) { 1362 case NLA_U32: 1363 opt_type = TEAM_OPTION_TYPE_U32; 1364 break; 1365 case NLA_STRING: 1366 opt_type = TEAM_OPTION_TYPE_STRING; 1367 break; 1368 default: 1369 goto team_put; 1370 } 1371 1372 opt_name = nla_data(mode_attrs[TEAM_ATTR_OPTION_NAME]); 1373 list_for_each_entry(option, &team->option_list, list) { 1374 long arg; 1375 struct nlattr *opt_data_attr; 1376 1377 if (option->type != opt_type || 1378 strcmp(option->name, opt_name)) 1379 continue; 1380 opt_found = true; 1381 opt_data_attr = mode_attrs[TEAM_ATTR_OPTION_DATA]; 1382 switch (opt_type) { 1383 case TEAM_OPTION_TYPE_U32: 1384 arg = nla_get_u32(opt_data_attr); 1385 break; 1386 case TEAM_OPTION_TYPE_STRING: 1387 arg = (long) nla_data(opt_data_attr); 1388 break; 1389 default: 1390 BUG(); 1391 } 1392 err = team_option_set(team, option, &arg); 1393 if (err) 1394 goto team_put; 1395 } 1396 if (!opt_found) { 1397 err = -ENOENT; 1398 goto team_put; 1399 } 1400 } 1401 1402 team_put: 1403 team_nl_team_put(team); 1404 1405 return err; 1406 } 1407 1408 static int team_nl_fill_port_list_get(struct sk_buff *skb, 1409 u32 pid, u32 seq, int flags, 1410 struct team *team, 1411 bool fillall) 1412 { 1413 struct nlattr *port_list; 1414 void *hdr; 1415 struct team_port *port; 1416 1417 hdr = genlmsg_put(skb, pid, seq, &team_nl_family, flags, 1418 TEAM_CMD_PORT_LIST_GET); 1419 if (IS_ERR(hdr)) 1420 return PTR_ERR(hdr); 1421 1422 NLA_PUT_U32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex); 1423 port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT); 1424 if (!port_list) 1425 return -EMSGSIZE; 1426 1427 list_for_each_entry(port, &team->port_list, list) { 1428 struct nlattr *port_item; 1429 1430 /* Include only changed ports if fill all mode is not on */ 1431 if (!fillall && !port->changed) 1432 continue; 1433 port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT); 1434 if (!port_item) 1435 goto nla_put_failure; 1436 NLA_PUT_U32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex); 1437 if (port->changed) { 1438 NLA_PUT_FLAG(skb, TEAM_ATTR_PORT_CHANGED); 1439 port->changed = false; 1440 } 1441 if (port->removed) 1442 NLA_PUT_FLAG(skb, TEAM_ATTR_PORT_REMOVED); 1443 if (port->linkup) 1444 NLA_PUT_FLAG(skb, TEAM_ATTR_PORT_LINKUP); 1445 NLA_PUT_U32(skb, TEAM_ATTR_PORT_SPEED, port->speed); 1446 NLA_PUT_U8(skb, TEAM_ATTR_PORT_DUPLEX, port->duplex); 1447 nla_nest_end(skb, port_item); 1448 } 1449 1450 nla_nest_end(skb, port_list); 1451 return genlmsg_end(skb, hdr); 1452 1453 nla_put_failure: 1454 genlmsg_cancel(skb, hdr); 1455 return -EMSGSIZE; 1456 } 1457 1458 static int team_nl_fill_port_list_get_all(struct sk_buff *skb, 1459 struct genl_info *info, int flags, 1460 struct team *team) 1461 { 1462 return team_nl_fill_port_list_get(skb, info->snd_pid, 1463 info->snd_seq, NLM_F_ACK, 1464 team, true); 1465 } 1466 1467 static int team_nl_cmd_port_list_get(struct sk_buff *skb, 1468 struct genl_info *info) 1469 { 1470 struct team *team; 1471 int err; 1472 1473 team = team_nl_team_get(info); 1474 if (!team) 1475 return -EINVAL; 1476 1477 err = team_nl_send_generic(info, team, team_nl_fill_port_list_get_all); 1478 1479 team_nl_team_put(team); 1480 1481 return err; 1482 } 1483 1484 static struct genl_ops team_nl_ops[] = { 1485 { 1486 .cmd = TEAM_CMD_NOOP, 1487 .doit = team_nl_cmd_noop, 1488 .policy = team_nl_policy, 1489 }, 1490 { 1491 .cmd = TEAM_CMD_OPTIONS_SET, 1492 .doit = team_nl_cmd_options_set, 1493 .policy = team_nl_policy, 1494 .flags = GENL_ADMIN_PERM, 1495 }, 1496 { 1497 .cmd = TEAM_CMD_OPTIONS_GET, 1498 .doit = team_nl_cmd_options_get, 1499 .policy = team_nl_policy, 1500 .flags = GENL_ADMIN_PERM, 1501 }, 1502 { 1503 .cmd = TEAM_CMD_PORT_LIST_GET, 1504 .doit = team_nl_cmd_port_list_get, 1505 .policy = team_nl_policy, 1506 .flags = GENL_ADMIN_PERM, 1507 }, 1508 }; 1509 1510 static struct genl_multicast_group team_change_event_mcgrp = { 1511 .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, 1512 }; 1513 1514 static int team_nl_send_event_options_get(struct team *team) 1515 { 1516 struct sk_buff *skb; 1517 int err; 1518 struct net *net = dev_net(team->dev); 1519 1520 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); 1521 if (!skb) 1522 return -ENOMEM; 1523 1524 err = team_nl_fill_options_get(skb, 0, 0, 0, team, false); 1525 if (err < 0) 1526 goto err_fill; 1527 1528 err = genlmsg_multicast_netns(net, skb, 0, team_change_event_mcgrp.id, 1529 GFP_KERNEL); 1530 return err; 1531 1532 err_fill: 1533 nlmsg_free(skb); 1534 return err; 1535 } 1536 1537 static int team_nl_send_event_port_list_get(struct team *team) 1538 { 1539 struct sk_buff *skb; 1540 int err; 1541 struct net *net = dev_net(team->dev); 1542 1543 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); 1544 if (!skb) 1545 return -ENOMEM; 1546 1547 err = team_nl_fill_port_list_get(skb, 0, 0, 0, team, false); 1548 if (err < 0) 1549 goto err_fill; 1550 1551 err = genlmsg_multicast_netns(net, skb, 0, team_change_event_mcgrp.id, 1552 GFP_KERNEL); 1553 return err; 1554 1555 err_fill: 1556 nlmsg_free(skb); 1557 return err; 1558 } 1559 1560 static int team_nl_init(void) 1561 { 1562 int err; 1563 1564 err = genl_register_family_with_ops(&team_nl_family, team_nl_ops, 1565 ARRAY_SIZE(team_nl_ops)); 1566 if (err) 1567 return err; 1568 1569 err = genl_register_mc_group(&team_nl_family, &team_change_event_mcgrp); 1570 if (err) 1571 goto err_change_event_grp_reg; 1572 1573 return 0; 1574 1575 err_change_event_grp_reg: 1576 genl_unregister_family(&team_nl_family); 1577 1578 return err; 1579 } 1580 1581 static void team_nl_fini(void) 1582 { 1583 genl_unregister_family(&team_nl_family); 1584 } 1585 1586 1587 /****************** 1588 * Change checkers 1589 ******************/ 1590 1591 static void __team_options_change_check(struct team *team) 1592 { 1593 int err; 1594 1595 err = team_nl_send_event_options_get(team); 1596 if (err) 1597 netdev_warn(team->dev, "Failed to send options change via netlink\n"); 1598 } 1599 1600 /* rtnl lock is held */ 1601 static void __team_port_change_check(struct team_port *port, bool linkup) 1602 { 1603 int err; 1604 1605 if (!port->removed && port->linkup == linkup) 1606 return; 1607 1608 port->changed = true; 1609 port->linkup = linkup; 1610 if (linkup) { 1611 struct ethtool_cmd ecmd; 1612 1613 err = __ethtool_get_settings(port->dev, &ecmd); 1614 if (!err) { 1615 port->speed = ethtool_cmd_speed(&ecmd); 1616 port->duplex = ecmd.duplex; 1617 goto send_event; 1618 } 1619 } 1620 port->speed = 0; 1621 port->duplex = 0; 1622 1623 send_event: 1624 err = team_nl_send_event_port_list_get(port->team); 1625 if (err) 1626 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink\n", 1627 port->dev->name); 1628 1629 } 1630 1631 static void team_port_change_check(struct team_port *port, bool linkup) 1632 { 1633 struct team *team = port->team; 1634 1635 mutex_lock(&team->lock); 1636 __team_port_change_check(port, linkup); 1637 mutex_unlock(&team->lock); 1638 } 1639 1640 /************************************ 1641 * Net device notifier event handler 1642 ************************************/ 1643 1644 static int team_device_event(struct notifier_block *unused, 1645 unsigned long event, void *ptr) 1646 { 1647 struct net_device *dev = (struct net_device *) ptr; 1648 struct team_port *port; 1649 1650 port = team_port_get_rtnl(dev); 1651 if (!port) 1652 return NOTIFY_DONE; 1653 1654 switch (event) { 1655 case NETDEV_UP: 1656 if (netif_carrier_ok(dev)) 1657 team_port_change_check(port, true); 1658 case NETDEV_DOWN: 1659 team_port_change_check(port, false); 1660 case NETDEV_CHANGE: 1661 if (netif_running(port->dev)) 1662 team_port_change_check(port, 1663 !!netif_carrier_ok(port->dev)); 1664 break; 1665 case NETDEV_UNREGISTER: 1666 team_del_slave(port->team->dev, dev); 1667 break; 1668 case NETDEV_FEAT_CHANGE: 1669 team_compute_features(port->team); 1670 break; 1671 case NETDEV_CHANGEMTU: 1672 /* Forbid to change mtu of underlaying device */ 1673 return NOTIFY_BAD; 1674 case NETDEV_PRE_TYPE_CHANGE: 1675 /* Forbid to change type of underlaying device */ 1676 return NOTIFY_BAD; 1677 } 1678 return NOTIFY_DONE; 1679 } 1680 1681 static struct notifier_block team_notifier_block __read_mostly = { 1682 .notifier_call = team_device_event, 1683 }; 1684 1685 1686 /*********************** 1687 * Module init and exit 1688 ***********************/ 1689 1690 static int __init team_module_init(void) 1691 { 1692 int err; 1693 1694 register_netdevice_notifier(&team_notifier_block); 1695 1696 err = rtnl_link_register(&team_link_ops); 1697 if (err) 1698 goto err_rtnl_reg; 1699 1700 err = team_nl_init(); 1701 if (err) 1702 goto err_nl_init; 1703 1704 return 0; 1705 1706 err_nl_init: 1707 rtnl_link_unregister(&team_link_ops); 1708 1709 err_rtnl_reg: 1710 unregister_netdevice_notifier(&team_notifier_block); 1711 1712 return err; 1713 } 1714 1715 static void __exit team_module_exit(void) 1716 { 1717 team_nl_fini(); 1718 rtnl_link_unregister(&team_link_ops); 1719 unregister_netdevice_notifier(&team_notifier_block); 1720 } 1721 1722 module_init(team_module_init); 1723 module_exit(team_module_exit); 1724 1725 MODULE_LICENSE("GPL v2"); 1726 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>"); 1727 MODULE_DESCRIPTION("Ethernet team device driver"); 1728 MODULE_ALIAS_RTNL_LINK(DRV_NAME); 1729