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