1/*
   2 * drivers/net/team/team.c - Network team device driver
   3 * Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com>
   4 *
   5 * This program is free software; you can redistribute it and/or modify
   6 * it under the terms of the GNU General Public License as published by
   7 * the Free Software Foundation; either version 2 of the License, or
   8 * (at your option) any later version.
   9 */
  10
  11#include <linux/kernel.h>
  12#include <linux/types.h>
  13#include <linux/module.h>
  14#include <linux/init.h>
  15#include <linux/slab.h>
  16#include <linux/rcupdate.h>
  17#include <linux/errno.h>
  18#include <linux/ctype.h>
  19#include <linux/notifier.h>
  20#include <linux/netdevice.h>
  21#include <linux/netpoll.h>
  22#include <linux/if_vlan.h>
  23#include <linux/if_arp.h>
  24#include <linux/socket.h>
  25#include <linux/etherdevice.h>
  26#include <linux/rtnetlink.h>
  27#include <net/rtnetlink.h>
  28#include <net/genetlink.h>
  29#include <net/netlink.h>
  30#include <net/sch_generic.h>
  31#include <generated/utsrelease.h>
  32#include <linux/if_team.h>
  33
  34#define DRV_NAME "team"
  35
  36
  37/**********
  38 * Helpers
  39 **********/
  40
  41#define team_port_exists(dev) (dev->priv_flags & IFF_TEAM_PORT)
  42
  43static struct team_port *team_port_get_rcu(const struct net_device *dev)
  44{
  45	struct team_port *port = rcu_dereference(dev->rx_handler_data);
  46
  47	return team_port_exists(dev) ? port : NULL;
  48}
  49
  50static struct team_port *team_port_get_rtnl(const struct net_device *dev)
  51{
  52	struct team_port *port = rtnl_dereference(dev->rx_handler_data);
  53
  54	return team_port_exists(dev) ? port : NULL;
  55}
  56
  57/*
  58 * Since the ability to change device address for open port device is tested in
  59 * team_port_add, this function can be called without control of return value
  60 */
  61static int __set_port_dev_addr(struct net_device *port_dev,
  62			       const unsigned char *dev_addr)
  63{
  64	struct sockaddr addr;
  65
  66	memcpy(addr.sa_data, dev_addr, port_dev->addr_len);
  67	addr.sa_family = port_dev->type;
  68	return dev_set_mac_address(port_dev, &addr);
  69}
  70
  71static int team_port_set_orig_dev_addr(struct team_port *port)
  72{
  73	return __set_port_dev_addr(port->dev, port->orig.dev_addr);
  74}
  75
  76static int team_port_set_team_dev_addr(struct team *team,
  77				       struct team_port *port)
  78{
  79	return __set_port_dev_addr(port->dev, team->dev->dev_addr);
  80}
  81
  82int team_modeop_port_enter(struct team *team, struct team_port *port)
  83{
  84	return team_port_set_team_dev_addr(team, port);
  85}
  86EXPORT_SYMBOL(team_modeop_port_enter);
  87
  88void team_modeop_port_change_dev_addr(struct team *team,
  89				      struct team_port *port)
  90{
  91	team_port_set_team_dev_addr(team, port);
  92}
  93EXPORT_SYMBOL(team_modeop_port_change_dev_addr);
  94
 
 
 
 
 
 
 
 
 
  95static void team_refresh_port_linkup(struct team_port *port)
  96{
  97	port->linkup = port->user.linkup_enabled ? port->user.linkup :
  98						   port->state.linkup;
 
 
 
 
 
  99}
 100
 101
 102/*******************
 103 * Options handling
 104 *******************/
 105
 106struct team_option_inst { /* One for each option instance */
 107	struct list_head list;
 108	struct list_head tmp_list;
 109	struct team_option *option;
 110	struct team_option_inst_info info;
 111	bool changed;
 112	bool removed;
 113};
 114
 115static struct team_option *__team_find_option(struct team *team,
 116					      const char *opt_name)
 117{
 118	struct team_option *option;
 119
 120	list_for_each_entry(option, &team->option_list, list) {
 121		if (strcmp(option->name, opt_name) == 0)
 122			return option;
 123	}
 124	return NULL;
 125}
 126
 127static void __team_option_inst_del(struct team_option_inst *opt_inst)
 128{
 129	list_del(&opt_inst->list);
 130	kfree(opt_inst);
 131}
 132
 133static void __team_option_inst_del_option(struct team *team,
 134					  struct team_option *option)
 135{
 136	struct team_option_inst *opt_inst, *tmp;
 137
 138	list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 139		if (opt_inst->option == option)
 140			__team_option_inst_del(opt_inst);
 141	}
 142}
 143
 144static int __team_option_inst_add(struct team *team, struct team_option *option,
 145				  struct team_port *port)
 146{
 147	struct team_option_inst *opt_inst;
 148	unsigned int array_size;
 149	unsigned int i;
 150	int err;
 151
 152	array_size = option->array_size;
 153	if (!array_size)
 154		array_size = 1; /* No array but still need one instance */
 155
 156	for (i = 0; i < array_size; i++) {
 157		opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL);
 158		if (!opt_inst)
 159			return -ENOMEM;
 160		opt_inst->option = option;
 161		opt_inst->info.port = port;
 162		opt_inst->info.array_index = i;
 163		opt_inst->changed = true;
 164		opt_inst->removed = false;
 165		list_add_tail(&opt_inst->list, &team->option_inst_list);
 166		if (option->init) {
 167			err = option->init(team, &opt_inst->info);
 168			if (err)
 169				return err;
 170		}
 171
 172	}
 173	return 0;
 174}
 175
 176static int __team_option_inst_add_option(struct team *team,
 177					 struct team_option *option)
 178{
 179	struct team_port *port;
 180	int err;
 181
 182	if (!option->per_port) {
 183		err = __team_option_inst_add(team, option, NULL);
 184		if (err)
 185			goto inst_del_option;
 186	}
 187
 188	list_for_each_entry(port, &team->port_list, list) {
 189		err = __team_option_inst_add(team, option, port);
 190		if (err)
 191			goto inst_del_option;
 192	}
 193	return 0;
 194
 195inst_del_option:
 196	__team_option_inst_del_option(team, option);
 197	return err;
 198}
 199
 200static void __team_option_inst_mark_removed_option(struct team *team,
 201						   struct team_option *option)
 202{
 203	struct team_option_inst *opt_inst;
 204
 205	list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 206		if (opt_inst->option == option) {
 207			opt_inst->changed = true;
 208			opt_inst->removed = true;
 209		}
 210	}
 211}
 212
 213static void __team_option_inst_del_port(struct team *team,
 214					struct team_port *port)
 215{
 216	struct team_option_inst *opt_inst, *tmp;
 217
 218	list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 219		if (opt_inst->option->per_port &&
 220		    opt_inst->info.port == port)
 221			__team_option_inst_del(opt_inst);
 222	}
 223}
 224
 225static int __team_option_inst_add_port(struct team *team,
 226				       struct team_port *port)
 227{
 228	struct team_option *option;
 229	int err;
 230
 231	list_for_each_entry(option, &team->option_list, list) {
 232		if (!option->per_port)
 233			continue;
 234		err = __team_option_inst_add(team, option, port);
 235		if (err)
 236			goto inst_del_port;
 237	}
 238	return 0;
 239
 240inst_del_port:
 241	__team_option_inst_del_port(team, port);
 242	return err;
 243}
 244
 245static void __team_option_inst_mark_removed_port(struct team *team,
 246						 struct team_port *port)
 247{
 248	struct team_option_inst *opt_inst;
 249
 250	list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 251		if (opt_inst->info.port == port) {
 252			opt_inst->changed = true;
 253			opt_inst->removed = true;
 254		}
 255	}
 256}
 257
 258static int __team_options_register(struct team *team,
 259				   const struct team_option *option,
 260				   size_t option_count)
 261{
 262	int i;
 263	struct team_option **dst_opts;
 264	int err;
 265
 266	dst_opts = kzalloc(sizeof(struct team_option *) * option_count,
 267			   GFP_KERNEL);
 268	if (!dst_opts)
 269		return -ENOMEM;
 270	for (i = 0; i < option_count; i++, option++) {
 271		if (__team_find_option(team, option->name)) {
 272			err = -EEXIST;
 273			goto alloc_rollback;
 274		}
 275		dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
 276		if (!dst_opts[i]) {
 277			err = -ENOMEM;
 278			goto alloc_rollback;
 279		}
 280	}
 281
 282	for (i = 0; i < option_count; i++) {
 283		err = __team_option_inst_add_option(team, dst_opts[i]);
 284		if (err)
 285			goto inst_rollback;
 286		list_add_tail(&dst_opts[i]->list, &team->option_list);
 287	}
 288
 289	kfree(dst_opts);
 290	return 0;
 291
 292inst_rollback:
 293	for (i--; i >= 0; i--)
 294		__team_option_inst_del_option(team, dst_opts[i]);
 295
 296	i = option_count - 1;
 297alloc_rollback:
 298	for (i--; i >= 0; i--)
 299		kfree(dst_opts[i]);
 300
 301	kfree(dst_opts);
 302	return err;
 303}
 304
 305static void __team_options_mark_removed(struct team *team,
 306					const struct team_option *option,
 307					size_t option_count)
 308{
 309	int i;
 310
 311	for (i = 0; i < option_count; i++, option++) {
 312		struct team_option *del_opt;
 313
 314		del_opt = __team_find_option(team, option->name);
 315		if (del_opt)
 316			__team_option_inst_mark_removed_option(team, del_opt);
 317	}
 318}
 319
 320static void __team_options_unregister(struct team *team,
 321				      const struct team_option *option,
 322				      size_t option_count)
 323{
 324	int i;
 325
 326	for (i = 0; i < option_count; i++, option++) {
 327		struct team_option *del_opt;
 328
 329		del_opt = __team_find_option(team, option->name);
 330		if (del_opt) {
 331			__team_option_inst_del_option(team, del_opt);
 332			list_del(&del_opt->list);
 333			kfree(del_opt);
 334		}
 335	}
 336}
 337
 338static void __team_options_change_check(struct team *team);
 339
 340int team_options_register(struct team *team,
 341			  const struct team_option *option,
 342			  size_t option_count)
 343{
 344	int err;
 345
 346	err = __team_options_register(team, option, option_count);
 347	if (err)
 348		return err;
 349	__team_options_change_check(team);
 350	return 0;
 351}
 352EXPORT_SYMBOL(team_options_register);
 353
 354void team_options_unregister(struct team *team,
 355			     const struct team_option *option,
 356			     size_t option_count)
 357{
 358	__team_options_mark_removed(team, option, option_count);
 359	__team_options_change_check(team);
 360	__team_options_unregister(team, option, option_count);
 361}
 362EXPORT_SYMBOL(team_options_unregister);
 363
 364static int team_option_get(struct team *team,
 365			   struct team_option_inst *opt_inst,
 366			   struct team_gsetter_ctx *ctx)
 367{
 368	if (!opt_inst->option->getter)
 369		return -EOPNOTSUPP;
 370	return opt_inst->option->getter(team, ctx);
 371}
 372
 373static int team_option_set(struct team *team,
 374			   struct team_option_inst *opt_inst,
 375			   struct team_gsetter_ctx *ctx)
 376{
 377	if (!opt_inst->option->setter)
 378		return -EOPNOTSUPP;
 379	return opt_inst->option->setter(team, ctx);
 380}
 381
 382void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info)
 383{
 384	struct team_option_inst *opt_inst;
 385
 386	opt_inst = container_of(opt_inst_info, struct team_option_inst, info);
 387	opt_inst->changed = true;
 388}
 389EXPORT_SYMBOL(team_option_inst_set_change);
 390
 391void team_options_change_check(struct team *team)
 392{
 393	__team_options_change_check(team);
 394}
 395EXPORT_SYMBOL(team_options_change_check);
 396
 397
 398/****************
 399 * Mode handling
 400 ****************/
 401
 402static LIST_HEAD(mode_list);
 403static DEFINE_SPINLOCK(mode_list_lock);
 404
 405struct team_mode_item {
 406	struct list_head list;
 407	const struct team_mode *mode;
 408};
 409
 410static struct team_mode_item *__find_mode(const char *kind)
 411{
 412	struct team_mode_item *mitem;
 413
 414	list_for_each_entry(mitem, &mode_list, list) {
 415		if (strcmp(mitem->mode->kind, kind) == 0)
 416			return mitem;
 417	}
 418	return NULL;
 419}
 420
 421static bool is_good_mode_name(const char *name)
 422{
 423	while (*name != '\0') {
 424		if (!isalpha(*name) && !isdigit(*name) && *name != '_')
 425			return false;
 426		name++;
 427	}
 428	return true;
 429}
 430
 431int team_mode_register(const struct team_mode *mode)
 432{
 433	int err = 0;
 434	struct team_mode_item *mitem;
 435
 436	if (!is_good_mode_name(mode->kind) ||
 437	    mode->priv_size > TEAM_MODE_PRIV_SIZE)
 438		return -EINVAL;
 439
 440	mitem = kmalloc(sizeof(*mitem), GFP_KERNEL);
 441	if (!mitem)
 442		return -ENOMEM;
 443
 444	spin_lock(&mode_list_lock);
 445	if (__find_mode(mode->kind)) {
 446		err = -EEXIST;
 447		kfree(mitem);
 448		goto unlock;
 449	}
 450	mitem->mode = mode;
 451	list_add_tail(&mitem->list, &mode_list);
 452unlock:
 453	spin_unlock(&mode_list_lock);
 454	return err;
 455}
 456EXPORT_SYMBOL(team_mode_register);
 457
 458void team_mode_unregister(const struct team_mode *mode)
 459{
 460	struct team_mode_item *mitem;
 461
 462	spin_lock(&mode_list_lock);
 463	mitem = __find_mode(mode->kind);
 464	if (mitem) {
 465		list_del_init(&mitem->list);
 466		kfree(mitem);
 467	}
 468	spin_unlock(&mode_list_lock);
 469}
 470EXPORT_SYMBOL(team_mode_unregister);
 471
 472static const struct team_mode *team_mode_get(const char *kind)
 473{
 474	struct team_mode_item *mitem;
 475	const struct team_mode *mode = NULL;
 476
 477	spin_lock(&mode_list_lock);
 478	mitem = __find_mode(kind);
 479	if (!mitem) {
 480		spin_unlock(&mode_list_lock);
 481		request_module("team-mode-%s", kind);
 482		spin_lock(&mode_list_lock);
 483		mitem = __find_mode(kind);
 484	}
 485	if (mitem) {
 486		mode = mitem->mode;
 487		if (!try_module_get(mode->owner))
 488			mode = NULL;
 489	}
 490
 491	spin_unlock(&mode_list_lock);
 492	return mode;
 493}
 494
 495static void team_mode_put(const struct team_mode *mode)
 496{
 497	module_put(mode->owner);
 498}
 499
 500static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
 501{
 502	dev_kfree_skb_any(skb);
 503	return false;
 504}
 505
 506static rx_handler_result_t team_dummy_receive(struct team *team,
 507					      struct team_port *port,
 508					      struct sk_buff *skb)
 509{
 510	return RX_HANDLER_ANOTHER;
 511}
 512
 513static const struct team_mode __team_no_mode = {
 514	.kind		= "*NOMODE*",
 515};
 516
 517static bool team_is_mode_set(struct team *team)
 518{
 519	return team->mode != &__team_no_mode;
 520}
 521
 522static void team_set_no_mode(struct team *team)
 523{
 524	team->user_carrier_enabled = false;
 525	team->mode = &__team_no_mode;
 526}
 527
 528static void team_adjust_ops(struct team *team)
 529{
 530	/*
 531	 * To avoid checks in rx/tx skb paths, ensure here that non-null and
 532	 * correct ops are always set.
 533	 */
 534
 535	if (!team->en_port_count || !team_is_mode_set(team) ||
 536	    !team->mode->ops->transmit)
 537		team->ops.transmit = team_dummy_transmit;
 538	else
 539		team->ops.transmit = team->mode->ops->transmit;
 540
 541	if (!team->en_port_count || !team_is_mode_set(team) ||
 542	    !team->mode->ops->receive)
 543		team->ops.receive = team_dummy_receive;
 544	else
 545		team->ops.receive = team->mode->ops->receive;
 546}
 547
 548/*
 549 * We can benefit from the fact that it's ensured no port is present
 550 * at the time of mode change. Therefore no packets are in fly so there's no
 551 * need to set mode operations in any special way.
 552 */
 553static int __team_change_mode(struct team *team,
 554			      const struct team_mode *new_mode)
 555{
 556	/* Check if mode was previously set and do cleanup if so */
 557	if (team_is_mode_set(team)) {
 558		void (*exit_op)(struct team *team) = team->ops.exit;
 559
 560		/* Clear ops area so no callback is called any longer */
 561		memset(&team->ops, 0, sizeof(struct team_mode_ops));
 562		team_adjust_ops(team);
 563
 564		if (exit_op)
 565			exit_op(team);
 566		team_mode_put(team->mode);
 567		team_set_no_mode(team);
 568		/* zero private data area */
 569		memset(&team->mode_priv, 0,
 570		       sizeof(struct team) - offsetof(struct team, mode_priv));
 571	}
 572
 573	if (!new_mode)
 574		return 0;
 575
 576	if (new_mode->ops->init) {
 577		int err;
 578
 579		err = new_mode->ops->init(team);
 580		if (err)
 581			return err;
 582	}
 583
 584	team->mode = new_mode;
 585	memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
 586	team_adjust_ops(team);
 587
 588	return 0;
 589}
 590
 591static int team_change_mode(struct team *team, const char *kind)
 592{
 593	const struct team_mode *new_mode;
 594	struct net_device *dev = team->dev;
 595	int err;
 596
 597	if (!list_empty(&team->port_list)) {
 598		netdev_err(dev, "No ports can be present during mode change\n");
 599		return -EBUSY;
 600	}
 601
 602	if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) {
 603		netdev_err(dev, "Unable to change to the same mode the team is in\n");
 604		return -EINVAL;
 605	}
 606
 607	new_mode = team_mode_get(kind);
 608	if (!new_mode) {
 609		netdev_err(dev, "Mode \"%s\" not found\n", kind);
 610		return -EINVAL;
 611	}
 612
 613	err = __team_change_mode(team, new_mode);
 614	if (err) {
 615		netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
 616		team_mode_put(new_mode);
 617		return err;
 618	}
 619
 620	netdev_info(dev, "Mode changed to \"%s\"\n", kind);
 621	return 0;
 622}
 623
 624
 625/*********************
 626 * Peers notification
 627 *********************/
 628
 629static void team_notify_peers_work(struct work_struct *work)
 630{
 631	struct team *team;
 
 632
 633	team = container_of(work, struct team, notify_peers.dw.work);
 634
 635	if (!rtnl_trylock()) {
 636		schedule_delayed_work(&team->notify_peers.dw, 0);
 637		return;
 638	}
 
 
 
 
 
 639	call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, team->dev);
 640	rtnl_unlock();
 641	if (!atomic_dec_and_test(&team->notify_peers.count_pending))
 642		schedule_delayed_work(&team->notify_peers.dw,
 643				      msecs_to_jiffies(team->notify_peers.interval));
 644}
 645
 646static void team_notify_peers(struct team *team)
 647{
 648	if (!team->notify_peers.count || !netif_running(team->dev))
 649		return;
 650	atomic_set(&team->notify_peers.count_pending, team->notify_peers.count);
 651	schedule_delayed_work(&team->notify_peers.dw, 0);
 652}
 653
 654static void team_notify_peers_init(struct team *team)
 655{
 656	INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work);
 657}
 658
 659static void team_notify_peers_fini(struct team *team)
 660{
 661	cancel_delayed_work_sync(&team->notify_peers.dw);
 662}
 663
 664
 665/*******************************
 666 * Send multicast group rejoins
 667 *******************************/
 668
 669static void team_mcast_rejoin_work(struct work_struct *work)
 670{
 671	struct team *team;
 
 672
 673	team = container_of(work, struct team, mcast_rejoin.dw.work);
 674
 675	if (!rtnl_trylock()) {
 676		schedule_delayed_work(&team->mcast_rejoin.dw, 0);
 677		return;
 678	}
 
 
 
 
 
 679	call_netdevice_notifiers(NETDEV_RESEND_IGMP, team->dev);
 680	rtnl_unlock();
 681	if (!atomic_dec_and_test(&team->mcast_rejoin.count_pending))
 682		schedule_delayed_work(&team->mcast_rejoin.dw,
 683				      msecs_to_jiffies(team->mcast_rejoin.interval));
 684}
 685
 686static void team_mcast_rejoin(struct team *team)
 687{
 688	if (!team->mcast_rejoin.count || !netif_running(team->dev))
 689		return;
 690	atomic_set(&team->mcast_rejoin.count_pending, team->mcast_rejoin.count);
 691	schedule_delayed_work(&team->mcast_rejoin.dw, 0);
 692}
 693
 694static void team_mcast_rejoin_init(struct team *team)
 695{
 696	INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work);
 697}
 698
 699static void team_mcast_rejoin_fini(struct team *team)
 700{
 701	cancel_delayed_work_sync(&team->mcast_rejoin.dw);
 702}
 703
 704
 705/************************
 706 * Rx path frame handler
 707 ************************/
 708
 709/* note: already called with rcu_read_lock */
 710static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
 711{
 712	struct sk_buff *skb = *pskb;
 713	struct team_port *port;
 714	struct team *team;
 715	rx_handler_result_t res;
 716
 717	skb = skb_share_check(skb, GFP_ATOMIC);
 718	if (!skb)
 719		return RX_HANDLER_CONSUMED;
 720
 721	*pskb = skb;
 722
 723	port = team_port_get_rcu(skb->dev);
 724	team = port->team;
 725	if (!team_port_enabled(port)) {
 726		/* allow exact match delivery for disabled ports */
 727		res = RX_HANDLER_EXACT;
 728	} else {
 729		res = team->ops.receive(team, port, skb);
 730	}
 731	if (res == RX_HANDLER_ANOTHER) {
 732		struct team_pcpu_stats *pcpu_stats;
 733
 734		pcpu_stats = this_cpu_ptr(team->pcpu_stats);
 735		u64_stats_update_begin(&pcpu_stats->syncp);
 736		pcpu_stats->rx_packets++;
 737		pcpu_stats->rx_bytes += skb->len;
 738		if (skb->pkt_type == PACKET_MULTICAST)
 739			pcpu_stats->rx_multicast++;
 740		u64_stats_update_end(&pcpu_stats->syncp);
 741
 742		skb->dev = team->dev;
 
 
 743	} else {
 744		this_cpu_inc(team->pcpu_stats->rx_dropped);
 745	}
 746
 747	return res;
 748}
 749
 750
 751/*************************************
 752 * Multiqueue Tx port select override
 753 *************************************/
 754
 755static int team_queue_override_init(struct team *team)
 756{
 757	struct list_head *listarr;
 758	unsigned int queue_cnt = team->dev->num_tx_queues - 1;
 759	unsigned int i;
 760
 761	if (!queue_cnt)
 762		return 0;
 763	listarr = kmalloc(sizeof(struct list_head) * queue_cnt, GFP_KERNEL);
 
 764	if (!listarr)
 765		return -ENOMEM;
 766	team->qom_lists = listarr;
 767	for (i = 0; i < queue_cnt; i++)
 768		INIT_LIST_HEAD(listarr++);
 769	return 0;
 770}
 771
 772static void team_queue_override_fini(struct team *team)
 773{
 774	kfree(team->qom_lists);
 775}
 776
 777static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
 778{
 779	return &team->qom_lists[queue_id - 1];
 780}
 781
 782/*
 783 * note: already called with rcu_read_lock
 784 */
 785static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
 786{
 787	struct list_head *qom_list;
 788	struct team_port *port;
 789
 790	if (!team->queue_override_enabled || !skb->queue_mapping)
 791		return false;
 792	qom_list = __team_get_qom_list(team, skb->queue_mapping);
 793	list_for_each_entry_rcu(port, qom_list, qom_list) {
 794		if (!team_dev_queue_xmit(team, port, skb))
 795			return true;
 796	}
 797	return false;
 798}
 799
 800static void __team_queue_override_port_del(struct team *team,
 801					   struct team_port *port)
 802{
 803	if (!port->queue_id)
 804		return;
 805	list_del_rcu(&port->qom_list);
 806}
 807
 808static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
 809						      struct team_port *cur)
 810{
 811	if (port->priority < cur->priority)
 812		return true;
 813	if (port->priority > cur->priority)
 814		return false;
 815	if (port->index < cur->index)
 816		return true;
 817	return false;
 818}
 819
 820static void __team_queue_override_port_add(struct team *team,
 821					   struct team_port *port)
 822{
 823	struct team_port *cur;
 824	struct list_head *qom_list;
 825	struct list_head *node;
 826
 827	if (!port->queue_id)
 828		return;
 829	qom_list = __team_get_qom_list(team, port->queue_id);
 830	node = qom_list;
 831	list_for_each_entry(cur, qom_list, qom_list) {
 832		if (team_queue_override_port_has_gt_prio_than(port, cur))
 833			break;
 834		node = &cur->qom_list;
 835	}
 836	list_add_tail_rcu(&port->qom_list, node);
 837}
 838
 839static void __team_queue_override_enabled_check(struct team *team)
 840{
 841	struct team_port *port;
 842	bool enabled = false;
 843
 844	list_for_each_entry(port, &team->port_list, list) {
 845		if (port->queue_id) {
 846			enabled = true;
 847			break;
 848		}
 849	}
 850	if (enabled == team->queue_override_enabled)
 851		return;
 852	netdev_dbg(team->dev, "%s queue override\n",
 853		   enabled ? "Enabling" : "Disabling");
 854	team->queue_override_enabled = enabled;
 855}
 856
 857static void team_queue_override_port_prio_changed(struct team *team,
 858						  struct team_port *port)
 859{
 860	if (!port->queue_id || team_port_enabled(port))
 861		return;
 862	__team_queue_override_port_del(team, port);
 863	__team_queue_override_port_add(team, port);
 864	__team_queue_override_enabled_check(team);
 865}
 866
 867static void team_queue_override_port_change_queue_id(struct team *team,
 868						     struct team_port *port,
 869						     u16 new_queue_id)
 870{
 871	if (team_port_enabled(port)) {
 872		__team_queue_override_port_del(team, port);
 873		port->queue_id = new_queue_id;
 874		__team_queue_override_port_add(team, port);
 875		__team_queue_override_enabled_check(team);
 876	} else {
 877		port->queue_id = new_queue_id;
 878	}
 879}
 880
 881static void team_queue_override_port_add(struct team *team,
 882					 struct team_port *port)
 883{
 884	__team_queue_override_port_add(team, port);
 885	__team_queue_override_enabled_check(team);
 886}
 887
 888static void team_queue_override_port_del(struct team *team,
 889					 struct team_port *port)
 890{
 891	__team_queue_override_port_del(team, port);
 892	__team_queue_override_enabled_check(team);
 893}
 894
 895
 896/****************
 897 * Port handling
 898 ****************/
 899
 900static bool team_port_find(const struct team *team,
 901			   const struct team_port *port)
 902{
 903	struct team_port *cur;
 904
 905	list_for_each_entry(cur, &team->port_list, list)
 906		if (cur == port)
 907			return true;
 908	return false;
 909}
 910
 911/*
 912 * Enable/disable port by adding to enabled port hashlist and setting
 913 * port->index (Might be racy so reader could see incorrect ifindex when
 914 * processing a flying packet, but that is not a problem). Write guarded
 915 * by team->lock.
 916 */
 917static void team_port_enable(struct team *team,
 918			     struct team_port *port)
 919{
 920	if (team_port_enabled(port))
 921		return;
 922	port->index = team->en_port_count++;
 923	hlist_add_head_rcu(&port->hlist,
 924			   team_port_index_hash(team, port->index));
 925	team_adjust_ops(team);
 926	team_queue_override_port_add(team, port);
 927	if (team->ops.port_enabled)
 928		team->ops.port_enabled(team, port);
 929	team_notify_peers(team);
 930	team_mcast_rejoin(team);
 
 931}
 932
 933static void __reconstruct_port_hlist(struct team *team, int rm_index)
 934{
 935	int i;
 936	struct team_port *port;
 937
 938	for (i = rm_index + 1; i < team->en_port_count; i++) {
 939		port = team_get_port_by_index(team, i);
 940		hlist_del_rcu(&port->hlist);
 941		port->index--;
 942		hlist_add_head_rcu(&port->hlist,
 943				   team_port_index_hash(team, port->index));
 944	}
 945}
 946
 947static void team_port_disable(struct team *team,
 948			      struct team_port *port)
 949{
 950	if (!team_port_enabled(port))
 951		return;
 952	if (team->ops.port_disabled)
 953		team->ops.port_disabled(team, port);
 954	hlist_del_rcu(&port->hlist);
 955	__reconstruct_port_hlist(team, port->index);
 956	port->index = -1;
 957	team->en_port_count--;
 958	team_queue_override_port_del(team, port);
 959	team_adjust_ops(team);
 960	team_notify_peers(team);
 961	team_mcast_rejoin(team);
 962}
 963
 964#define TEAM_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \
 965			    NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
 966			    NETIF_F_HIGHDMA | NETIF_F_LRO)
 967
 
 
 
 968static void __team_compute_features(struct team *team)
 969{
 970	struct team_port *port;
 971	u32 vlan_features = TEAM_VLAN_FEATURES;
 
 
 972	unsigned short max_hard_header_len = ETH_HLEN;
 973	unsigned int flags, dst_release_flag = IFF_XMIT_DST_RELEASE;
 
 974
 975	list_for_each_entry(port, &team->port_list, list) {
 976		vlan_features = netdev_increment_features(vlan_features,
 977					port->dev->vlan_features,
 978					TEAM_VLAN_FEATURES);
 
 
 
 
 
 979
 980		dst_release_flag &= port->dev->priv_flags;
 981		if (port->dev->hard_header_len > max_hard_header_len)
 982			max_hard_header_len = port->dev->hard_header_len;
 983	}
 984
 985	team->dev->vlan_features = vlan_features;
 
 
 
 
 986	team->dev->hard_header_len = max_hard_header_len;
 987
 988	flags = team->dev->priv_flags & ~IFF_XMIT_DST_RELEASE;
 989	team->dev->priv_flags = flags | dst_release_flag;
 990
 991	netdev_change_features(team->dev);
 992}
 993
 994static void team_compute_features(struct team *team)
 995{
 996	mutex_lock(&team->lock);
 997	__team_compute_features(team);
 998	mutex_unlock(&team->lock);
 
 999}
1000
1001static int team_port_enter(struct team *team, struct team_port *port)
1002{
1003	int err = 0;
1004
1005	dev_hold(team->dev);
1006	port->dev->priv_flags |= IFF_TEAM_PORT;
1007	if (team->ops.port_enter) {
1008		err = team->ops.port_enter(team, port);
1009		if (err) {
1010			netdev_err(team->dev, "Device %s failed to enter team mode\n",
1011				   port->dev->name);
1012			goto err_port_enter;
1013		}
1014	}
1015
1016	return 0;
1017
1018err_port_enter:
1019	port->dev->priv_flags &= ~IFF_TEAM_PORT;
1020	dev_put(team->dev);
1021
1022	return err;
1023}
1024
1025static void team_port_leave(struct team *team, struct team_port *port)
1026{
1027	if (team->ops.port_leave)
1028		team->ops.port_leave(team, port);
1029	port->dev->priv_flags &= ~IFF_TEAM_PORT;
1030	dev_put(team->dev);
1031}
1032
1033#ifdef CONFIG_NET_POLL_CONTROLLER
1034static int team_port_enable_netpoll(struct team *team, struct team_port *port)
1035{
1036	struct netpoll *np;
1037	int err;
1038
1039	if (!team->dev->npinfo)
1040		return 0;
1041
1042	np = kzalloc(sizeof(*np), GFP_KERNEL);
1043	if (!np)
1044		return -ENOMEM;
1045
1046	err = __netpoll_setup(np, port->dev);
1047	if (err) {
1048		kfree(np);
1049		return err;
1050	}
1051	port->np = np;
1052	return err;
1053}
1054
 
 
 
 
 
 
 
 
1055static void team_port_disable_netpoll(struct team_port *port)
1056{
1057	struct netpoll *np = port->np;
1058
1059	if (!np)
1060		return;
1061	port->np = NULL;
1062
1063	/* Wait for transmitting packets to finish before freeing. */
1064	synchronize_rcu_bh();
1065	__netpoll_cleanup(np);
1066	kfree(np);
1067}
1068#else
1069static int team_port_enable_netpoll(struct team *team, struct team_port *port)
1070{
1071	return 0;
1072}
1073static void team_port_disable_netpoll(struct team_port *port)
1074{
1075}
1076#endif
1077
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1078static void __team_port_change_port_added(struct team_port *port, bool linkup);
1079static int team_dev_type_check_change(struct net_device *dev,
1080				      struct net_device *port_dev);
1081
1082static int team_port_add(struct team *team, struct net_device *port_dev)
 
1083{
1084	struct net_device *dev = team->dev;
1085	struct team_port *port;
1086	char *portname = port_dev->name;
1087	int err;
1088
1089	if (port_dev->flags & IFF_LOOPBACK) {
 
1090		netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1091			   portname);
1092		return -EINVAL;
1093	}
1094
1095	if (team_port_exists(port_dev)) {
 
1096		netdev_err(dev, "Device %s is already a port "
1097				"of a team device\n", portname);
1098		return -EBUSY;
1099	}
1100
 
 
 
 
 
 
 
 
 
 
 
 
 
1101	if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1102	    vlan_uses_dev(dev)) {
 
1103		netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1104			   portname);
1105		return -EPERM;
1106	}
1107
1108	err = team_dev_type_check_change(dev, port_dev);
1109	if (err)
1110		return err;
1111
1112	if (port_dev->flags & IFF_UP) {
 
1113		netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1114			   portname);
1115		return -EBUSY;
1116	}
1117
1118	port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1119		       GFP_KERNEL);
1120	if (!port)
1121		return -ENOMEM;
1122
1123	port->dev = port_dev;
1124	port->team = team;
1125	INIT_LIST_HEAD(&port->qom_list);
1126
1127	port->orig.mtu = port_dev->mtu;
1128	err = dev_set_mtu(port_dev, dev->mtu);
1129	if (err) {
1130		netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1131		goto err_set_mtu;
1132	}
1133
1134	memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1135
1136	err = team_port_enter(team, port);
1137	if (err) {
1138		netdev_err(dev, "Device %s failed to enter team mode\n",
1139			   portname);
1140		goto err_port_enter;
1141	}
1142
1143	err = dev_open(port_dev);
1144	if (err) {
1145		netdev_dbg(dev, "Device %s opening failed\n",
1146			   portname);
1147		goto err_dev_open;
1148	}
1149
1150	err = vlan_vids_add_by_dev(port_dev, dev);
1151	if (err) {
1152		netdev_err(dev, "Failed to add vlan ids to device %s\n",
1153				portname);
1154		goto err_vids_add;
1155	}
1156
1157	err = team_port_enable_netpoll(team, port);
1158	if (err) {
1159		netdev_err(dev, "Failed to enable netpoll on device %s\n",
1160			   portname);
1161		goto err_enable_netpoll;
1162	}
1163
1164	err = netdev_master_upper_dev_link(port_dev, dev);
1165	if (err) {
1166		netdev_err(dev, "Device %s failed to set upper link\n",
1167			   portname);
1168		goto err_set_upper_link;
1169	}
1170
1171	err = netdev_rx_handler_register(port_dev, team_handle_frame,
1172					 port);
1173	if (err) {
1174		netdev_err(dev, "Device %s failed to register rx_handler\n",
1175			   portname);
1176		goto err_handler_register;
1177	}
1178
 
 
 
 
 
 
 
1179	err = __team_option_inst_add_port(team, port);
1180	if (err) {
1181		netdev_err(dev, "Device %s failed to add per-port options\n",
1182			   portname);
1183		goto err_option_port_add;
1184	}
1185
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1186	port->index = -1;
1187	list_add_tail_rcu(&port->list, &team->port_list);
1188	team_port_enable(team, port);
1189	__team_compute_features(team);
1190	__team_port_change_port_added(port, !!netif_carrier_ok(port_dev));
1191	__team_options_change_check(team);
1192
1193	netdev_info(dev, "Port device %s added\n", portname);
1194
1195	return 0;
1196
 
 
 
1197err_option_port_add:
 
 
 
1198	netdev_rx_handler_unregister(port_dev);
1199
1200err_handler_register:
1201	netdev_upper_dev_unlink(port_dev, dev);
1202
1203err_set_upper_link:
1204	team_port_disable_netpoll(port);
1205
1206err_enable_netpoll:
1207	vlan_vids_del_by_dev(port_dev, dev);
1208
1209err_vids_add:
1210	dev_close(port_dev);
1211
1212err_dev_open:
1213	team_port_leave(team, port);
1214	team_port_set_orig_dev_addr(port);
1215
1216err_port_enter:
1217	dev_set_mtu(port_dev, port->orig.mtu);
1218
1219err_set_mtu:
1220	kfree(port);
1221
1222	return err;
1223}
1224
1225static void __team_port_change_port_removed(struct team_port *port);
1226
1227static int team_port_del(struct team *team, struct net_device *port_dev)
1228{
1229	struct net_device *dev = team->dev;
1230	struct team_port *port;
1231	char *portname = port_dev->name;
1232
1233	port = team_port_get_rtnl(port_dev);
1234	if (!port || !team_port_find(team, port)) {
1235		netdev_err(dev, "Device %s does not act as a port of this team\n",
1236			   portname);
1237		return -ENOENT;
1238	}
1239
1240	team_port_disable(team, port);
1241	list_del_rcu(&port->list);
 
 
 
 
 
 
 
1242	netdev_rx_handler_unregister(port_dev);
1243	netdev_upper_dev_unlink(port_dev, dev);
1244	team_port_disable_netpoll(port);
1245	vlan_vids_del_by_dev(port_dev, dev);
1246	dev_uc_unsync(port_dev, dev);
1247	dev_mc_unsync(port_dev, dev);
1248	dev_close(port_dev);
1249	team_port_leave(team, port);
1250
1251	__team_option_inst_mark_removed_port(team, port);
1252	__team_options_change_check(team);
1253	__team_option_inst_del_port(team, port);
1254	__team_port_change_port_removed(port);
1255
1256	team_port_set_orig_dev_addr(port);
1257	dev_set_mtu(port_dev, port->orig.mtu);
1258	kfree_rcu(port, rcu);
1259	netdev_info(dev, "Port device %s removed\n", portname);
1260	__team_compute_features(team);
1261
1262	return 0;
1263}
1264
1265
1266/*****************
1267 * Net device ops
1268 *****************/
1269
1270static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1271{
1272	ctx->data.str_val = team->mode->kind;
1273	return 0;
1274}
1275
1276static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1277{
1278	return team_change_mode(team, ctx->data.str_val);
1279}
1280
1281static int team_notify_peers_count_get(struct team *team,
1282				       struct team_gsetter_ctx *ctx)
1283{
1284	ctx->data.u32_val = team->notify_peers.count;
1285	return 0;
1286}
1287
1288static int team_notify_peers_count_set(struct team *team,
1289				       struct team_gsetter_ctx *ctx)
1290{
1291	team->notify_peers.count = ctx->data.u32_val;
1292	return 0;
1293}
1294
1295static int team_notify_peers_interval_get(struct team *team,
1296					  struct team_gsetter_ctx *ctx)
1297{
1298	ctx->data.u32_val = team->notify_peers.interval;
1299	return 0;
1300}
1301
1302static int team_notify_peers_interval_set(struct team *team,
1303					  struct team_gsetter_ctx *ctx)
1304{
1305	team->notify_peers.interval = ctx->data.u32_val;
1306	return 0;
1307}
1308
1309static int team_mcast_rejoin_count_get(struct team *team,
1310				       struct team_gsetter_ctx *ctx)
1311{
1312	ctx->data.u32_val = team->mcast_rejoin.count;
1313	return 0;
1314}
1315
1316static int team_mcast_rejoin_count_set(struct team *team,
1317				       struct team_gsetter_ctx *ctx)
1318{
1319	team->mcast_rejoin.count = ctx->data.u32_val;
1320	return 0;
1321}
1322
1323static int team_mcast_rejoin_interval_get(struct team *team,
1324					  struct team_gsetter_ctx *ctx)
1325{
1326	ctx->data.u32_val = team->mcast_rejoin.interval;
1327	return 0;
1328}
1329
1330static int team_mcast_rejoin_interval_set(struct team *team,
1331					  struct team_gsetter_ctx *ctx)
1332{
1333	team->mcast_rejoin.interval = ctx->data.u32_val;
1334	return 0;
1335}
1336
1337static int team_port_en_option_get(struct team *team,
1338				   struct team_gsetter_ctx *ctx)
1339{
1340	struct team_port *port = ctx->info->port;
1341
1342	ctx->data.bool_val = team_port_enabled(port);
1343	return 0;
1344}
1345
1346static int team_port_en_option_set(struct team *team,
1347				   struct team_gsetter_ctx *ctx)
1348{
1349	struct team_port *port = ctx->info->port;
1350
1351	if (ctx->data.bool_val)
1352		team_port_enable(team, port);
1353	else
1354		team_port_disable(team, port);
1355	return 0;
1356}
1357
1358static int team_user_linkup_option_get(struct team *team,
1359				       struct team_gsetter_ctx *ctx)
1360{
1361	struct team_port *port = ctx->info->port;
1362
1363	ctx->data.bool_val = port->user.linkup;
1364	return 0;
1365}
1366
1367static void __team_carrier_check(struct team *team);
1368
1369static int team_user_linkup_option_set(struct team *team,
1370				       struct team_gsetter_ctx *ctx)
1371{
1372	struct team_port *port = ctx->info->port;
1373
1374	port->user.linkup = ctx->data.bool_val;
1375	team_refresh_port_linkup(port);
1376	__team_carrier_check(port->team);
1377	return 0;
1378}
1379
1380static int team_user_linkup_en_option_get(struct team *team,
1381					  struct team_gsetter_ctx *ctx)
1382{
1383	struct team_port *port = ctx->info->port;
1384
1385	ctx->data.bool_val = port->user.linkup_enabled;
1386	return 0;
1387}
1388
1389static int team_user_linkup_en_option_set(struct team *team,
1390					  struct team_gsetter_ctx *ctx)
1391{
1392	struct team_port *port = ctx->info->port;
1393
1394	port->user.linkup_enabled = ctx->data.bool_val;
1395	team_refresh_port_linkup(port);
1396	__team_carrier_check(port->team);
1397	return 0;
1398}
1399
1400static int team_priority_option_get(struct team *team,
1401				    struct team_gsetter_ctx *ctx)
1402{
1403	struct team_port *port = ctx->info->port;
1404
1405	ctx->data.s32_val = port->priority;
1406	return 0;
1407}
1408
1409static int team_priority_option_set(struct team *team,
1410				    struct team_gsetter_ctx *ctx)
1411{
1412	struct team_port *port = ctx->info->port;
1413	s32 priority = ctx->data.s32_val;
1414
1415	if (port->priority == priority)
1416		return 0;
1417	port->priority = priority;
1418	team_queue_override_port_prio_changed(team, port);
1419	return 0;
1420}
1421
1422static int team_queue_id_option_get(struct team *team,
1423				    struct team_gsetter_ctx *ctx)
1424{
1425	struct team_port *port = ctx->info->port;
1426
1427	ctx->data.u32_val = port->queue_id;
1428	return 0;
1429}
1430
1431static int team_queue_id_option_set(struct team *team,
1432				    struct team_gsetter_ctx *ctx)
1433{
1434	struct team_port *port = ctx->info->port;
1435	u16 new_queue_id = ctx->data.u32_val;
1436
1437	if (port->queue_id == new_queue_id)
1438		return 0;
1439	if (new_queue_id >= team->dev->real_num_tx_queues)
1440		return -EINVAL;
1441	team_queue_override_port_change_queue_id(team, port, new_queue_id);
1442	return 0;
1443}
1444
1445static const struct team_option team_options[] = {
1446	{
1447		.name = "mode",
1448		.type = TEAM_OPTION_TYPE_STRING,
1449		.getter = team_mode_option_get,
1450		.setter = team_mode_option_set,
1451	},
1452	{
1453		.name = "notify_peers_count",
1454		.type = TEAM_OPTION_TYPE_U32,
1455		.getter = team_notify_peers_count_get,
1456		.setter = team_notify_peers_count_set,
1457	},
1458	{
1459		.name = "notify_peers_interval",
1460		.type = TEAM_OPTION_TYPE_U32,
1461		.getter = team_notify_peers_interval_get,
1462		.setter = team_notify_peers_interval_set,
1463	},
1464	{
1465		.name = "mcast_rejoin_count",
1466		.type = TEAM_OPTION_TYPE_U32,
1467		.getter = team_mcast_rejoin_count_get,
1468		.setter = team_mcast_rejoin_count_set,
1469	},
1470	{
1471		.name = "mcast_rejoin_interval",
1472		.type = TEAM_OPTION_TYPE_U32,
1473		.getter = team_mcast_rejoin_interval_get,
1474		.setter = team_mcast_rejoin_interval_set,
1475	},
1476	{
1477		.name = "enabled",
1478		.type = TEAM_OPTION_TYPE_BOOL,
1479		.per_port = true,
1480		.getter = team_port_en_option_get,
1481		.setter = team_port_en_option_set,
1482	},
1483	{
1484		.name = "user_linkup",
1485		.type = TEAM_OPTION_TYPE_BOOL,
1486		.per_port = true,
1487		.getter = team_user_linkup_option_get,
1488		.setter = team_user_linkup_option_set,
1489	},
1490	{
1491		.name = "user_linkup_enabled",
1492		.type = TEAM_OPTION_TYPE_BOOL,
1493		.per_port = true,
1494		.getter = team_user_linkup_en_option_get,
1495		.setter = team_user_linkup_en_option_set,
1496	},
1497	{
1498		.name = "priority",
1499		.type = TEAM_OPTION_TYPE_S32,
1500		.per_port = true,
1501		.getter = team_priority_option_get,
1502		.setter = team_priority_option_set,
1503	},
1504	{
1505		.name = "queue_id",
1506		.type = TEAM_OPTION_TYPE_U32,
1507		.per_port = true,
1508		.getter = team_queue_id_option_get,
1509		.setter = team_queue_id_option_set,
1510	},
1511};
1512
1513static struct lock_class_key team_netdev_xmit_lock_key;
1514static struct lock_class_key team_netdev_addr_lock_key;
1515static struct lock_class_key team_tx_busylock_key;
1516
1517static void team_set_lockdep_class_one(struct net_device *dev,
1518				       struct netdev_queue *txq,
1519				       void *unused)
1520{
1521	lockdep_set_class(&txq->_xmit_lock, &team_netdev_xmit_lock_key);
1522}
1523
1524static void team_set_lockdep_class(struct net_device *dev)
1525{
1526	lockdep_set_class(&dev->addr_list_lock, &team_netdev_addr_lock_key);
1527	netdev_for_each_tx_queue(dev, team_set_lockdep_class_one, NULL);
1528	dev->qdisc_tx_busylock = &team_tx_busylock_key;
1529}
1530
1531static int team_init(struct net_device *dev)
1532{
1533	struct team *team = netdev_priv(dev);
1534	int i;
1535	int err;
1536
1537	team->dev = dev;
1538	mutex_init(&team->lock);
1539	team_set_no_mode(team);
1540
1541	team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1542	if (!team->pcpu_stats)
1543		return -ENOMEM;
1544
1545	for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1546		INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1547	INIT_LIST_HEAD(&team->port_list);
1548	err = team_queue_override_init(team);
1549	if (err)
1550		goto err_team_queue_override_init;
1551
1552	team_adjust_ops(team);
1553
1554	INIT_LIST_HEAD(&team->option_list);
1555	INIT_LIST_HEAD(&team->option_inst_list);
1556
1557	team_notify_peers_init(team);
1558	team_mcast_rejoin_init(team);
1559
1560	err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1561	if (err)
1562		goto err_options_register;
1563	netif_carrier_off(dev);
1564
1565	team_set_lockdep_class(dev);
 
1566
1567	return 0;
1568
1569err_options_register:
1570	team_mcast_rejoin_fini(team);
1571	team_notify_peers_fini(team);
1572	team_queue_override_fini(team);
1573err_team_queue_override_init:
1574	free_percpu(team->pcpu_stats);
1575
1576	return err;
1577}
1578
1579static void team_uninit(struct net_device *dev)
1580{
1581	struct team *team = netdev_priv(dev);
1582	struct team_port *port;
1583	struct team_port *tmp;
1584
1585	mutex_lock(&team->lock);
1586	list_for_each_entry_safe(port, tmp, &team->port_list, list)
1587		team_port_del(team, port->dev);
1588
1589	__team_change_mode(team, NULL); /* cleanup */
1590	__team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1591	team_mcast_rejoin_fini(team);
1592	team_notify_peers_fini(team);
1593	team_queue_override_fini(team);
1594	mutex_unlock(&team->lock);
 
 
1595}
1596
1597static void team_destructor(struct net_device *dev)
1598{
1599	struct team *team = netdev_priv(dev);
1600
1601	free_percpu(team->pcpu_stats);
1602	free_netdev(dev);
1603}
1604
1605static int team_open(struct net_device *dev)
1606{
1607	return 0;
1608}
1609
1610static int team_close(struct net_device *dev)
1611{
1612	return 0;
1613}
1614
1615/*
1616 * note: already called with rcu_read_lock
1617 */
1618static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1619{
1620	struct team *team = netdev_priv(dev);
1621	bool tx_success;
1622	unsigned int len = skb->len;
1623
1624	tx_success = team_queue_override_transmit(team, skb);
1625	if (!tx_success)
1626		tx_success = team->ops.transmit(team, skb);
1627	if (tx_success) {
1628		struct team_pcpu_stats *pcpu_stats;
1629
1630		pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1631		u64_stats_update_begin(&pcpu_stats->syncp);
1632		pcpu_stats->tx_packets++;
1633		pcpu_stats->tx_bytes += len;
1634		u64_stats_update_end(&pcpu_stats->syncp);
1635	} else {
1636		this_cpu_inc(team->pcpu_stats->tx_dropped);
1637	}
1638
1639	return NETDEV_TX_OK;
1640}
1641
1642static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1643			     void *accel_priv, select_queue_fallback_t fallback)
1644{
1645	/*
1646	 * This helper function exists to help dev_pick_tx get the correct
1647	 * destination queue.  Using a helper function skips a call to
1648	 * skb_tx_hash and will put the skbs in the queue we expect on their
1649	 * way down to the team driver.
1650	 */
1651	u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1652
1653	/*
1654	 * Save the original txq to restore before passing to the driver
1655	 */
1656	qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1657
1658	if (unlikely(txq >= dev->real_num_tx_queues)) {
1659		do {
1660			txq -= dev->real_num_tx_queues;
1661		} while (txq >= dev->real_num_tx_queues);
1662	}
1663	return txq;
1664}
1665
1666static void team_change_rx_flags(struct net_device *dev, int change)
1667{
1668	struct team *team = netdev_priv(dev);
1669	struct team_port *port;
1670	int inc;
1671
1672	rcu_read_lock();
1673	list_for_each_entry_rcu(port, &team->port_list, list) {
1674		if (change & IFF_PROMISC) {
1675			inc = dev->flags & IFF_PROMISC ? 1 : -1;
1676			dev_set_promiscuity(port->dev, inc);
1677		}
1678		if (change & IFF_ALLMULTI) {
1679			inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1680			dev_set_allmulti(port->dev, inc);
1681		}
1682	}
1683	rcu_read_unlock();
1684}
1685
1686static void team_set_rx_mode(struct net_device *dev)
1687{
1688	struct team *team = netdev_priv(dev);
1689	struct team_port *port;
1690
1691	rcu_read_lock();
1692	list_for_each_entry_rcu(port, &team->port_list, list) {
1693		dev_uc_sync_multiple(port->dev, dev);
1694		dev_mc_sync_multiple(port->dev, dev);
1695	}
1696	rcu_read_unlock();
1697}
1698
1699static int team_set_mac_address(struct net_device *dev, void *p)
1700{
1701	struct sockaddr *addr = p;
1702	struct team *team = netdev_priv(dev);
1703	struct team_port *port;
1704
1705	if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1706		return -EADDRNOTAVAIL;
1707	memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1708	rcu_read_lock();
1709	list_for_each_entry_rcu(port, &team->port_list, list)
1710		if (team->ops.port_change_dev_addr)
1711			team->ops.port_change_dev_addr(team, port);
1712	rcu_read_unlock();
1713	return 0;
1714}
1715
1716static int team_change_mtu(struct net_device *dev, int new_mtu)
1717{
1718	struct team *team = netdev_priv(dev);
1719	struct team_port *port;
1720	int err;
1721
1722	/*
1723	 * Alhough this is reader, it's guarded by team lock. It's not possible
1724	 * to traverse list in reverse under rcu_read_lock
1725	 */
1726	mutex_lock(&team->lock);
1727	team->port_mtu_change_allowed = true;
1728	list_for_each_entry(port, &team->port_list, list) {
1729		err = dev_set_mtu(port->dev, new_mtu);
1730		if (err) {
1731			netdev_err(dev, "Device %s failed to change mtu",
1732				   port->dev->name);
1733			goto unwind;
1734		}
1735	}
1736	team->port_mtu_change_allowed = false;
1737	mutex_unlock(&team->lock);
1738
1739	dev->mtu = new_mtu;
1740
1741	return 0;
1742
1743unwind:
1744	list_for_each_entry_continue_reverse(port, &team->port_list, list)
1745		dev_set_mtu(port->dev, dev->mtu);
1746	team->port_mtu_change_allowed = false;
1747	mutex_unlock(&team->lock);
1748
1749	return err;
1750}
1751
1752static struct rtnl_link_stats64 *
1753team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1754{
1755	struct team *team = netdev_priv(dev);
1756	struct team_pcpu_stats *p;
1757	u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1758	u32 rx_dropped = 0, tx_dropped = 0;
1759	unsigned int start;
1760	int i;
1761
1762	for_each_possible_cpu(i) {
1763		p = per_cpu_ptr(team->pcpu_stats, i);
1764		do {
1765			start = u64_stats_fetch_begin_irq(&p->syncp);
1766			rx_packets	= p->rx_packets;
1767			rx_bytes	= p->rx_bytes;
1768			rx_multicast	= p->rx_multicast;
1769			tx_packets	= p->tx_packets;
1770			tx_bytes	= p->tx_bytes;
1771		} while (u64_stats_fetch_retry_irq(&p->syncp, start));
1772
1773		stats->rx_packets	+= rx_packets;
1774		stats->rx_bytes		+= rx_bytes;
1775		stats->multicast	+= rx_multicast;
1776		stats->tx_packets	+= tx_packets;
1777		stats->tx_bytes		+= tx_bytes;
1778		/*
1779		 * rx_dropped & tx_dropped are u32, updated
1780		 * without syncp protection.
1781		 */
1782		rx_dropped	+= p->rx_dropped;
1783		tx_dropped	+= p->tx_dropped;
 
1784	}
1785	stats->rx_dropped	= rx_dropped;
1786	stats->tx_dropped	= tx_dropped;
1787	return stats;
1788}
1789
1790static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1791{
1792	struct team *team = netdev_priv(dev);
1793	struct team_port *port;
1794	int err;
1795
1796	/*
1797	 * Alhough this is reader, it's guarded by team lock. It's not possible
1798	 * to traverse list in reverse under rcu_read_lock
1799	 */
1800	mutex_lock(&team->lock);
1801	list_for_each_entry(port, &team->port_list, list) {
1802		err = vlan_vid_add(port->dev, proto, vid);
1803		if (err)
1804			goto unwind;
1805	}
1806	mutex_unlock(&team->lock);
1807
1808	return 0;
1809
1810unwind:
1811	list_for_each_entry_continue_reverse(port, &team->port_list, list)
1812		vlan_vid_del(port->dev, proto, vid);
1813	mutex_unlock(&team->lock);
1814
1815	return err;
1816}
1817
1818static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1819{
1820	struct team *team = netdev_priv(dev);
1821	struct team_port *port;
1822
1823	rcu_read_lock();
1824	list_for_each_entry_rcu(port, &team->port_list, list)
1825		vlan_vid_del(port->dev, proto, vid);
1826	rcu_read_unlock();
1827
1828	return 0;
1829}
1830
1831#ifdef CONFIG_NET_POLL_CONTROLLER
1832static void team_poll_controller(struct net_device *dev)
1833{
1834}
1835
1836static void __team_netpoll_cleanup(struct team *team)
1837{
1838	struct team_port *port;
1839
1840	list_for_each_entry(port, &team->port_list, list)
1841		team_port_disable_netpoll(port);
1842}
1843
1844static void team_netpoll_cleanup(struct net_device *dev)
1845{
1846	struct team *team = netdev_priv(dev);
1847
1848	mutex_lock(&team->lock);
1849	__team_netpoll_cleanup(team);
1850	mutex_unlock(&team->lock);
1851}
1852
1853static int team_netpoll_setup(struct net_device *dev,
1854			      struct netpoll_info *npifo)
1855{
1856	struct team *team = netdev_priv(dev);
1857	struct team_port *port;
1858	int err = 0;
1859
1860	mutex_lock(&team->lock);
1861	list_for_each_entry(port, &team->port_list, list) {
1862		err = team_port_enable_netpoll(team, port);
1863		if (err) {
1864			__team_netpoll_cleanup(team);
1865			break;
1866		}
1867	}
1868	mutex_unlock(&team->lock);
1869	return err;
1870}
1871#endif
1872
1873static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
 
1874{
1875	struct team *team = netdev_priv(dev);
1876	int err;
1877
1878	mutex_lock(&team->lock);
1879	err = team_port_add(team, port_dev);
1880	mutex_unlock(&team->lock);
 
 
 
 
1881	return err;
1882}
1883
1884static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1885{
1886	struct team *team = netdev_priv(dev);
1887	int err;
1888
1889	mutex_lock(&team->lock);
1890	err = team_port_del(team, port_dev);
1891	mutex_unlock(&team->lock);
 
 
 
 
 
 
 
 
 
 
 
1892	return err;
1893}
1894
1895static netdev_features_t team_fix_features(struct net_device *dev,
1896					   netdev_features_t features)
1897{
1898	struct team_port *port;
1899	struct team *team = netdev_priv(dev);
1900	netdev_features_t mask;
1901
1902	mask = features;
1903	features &= ~NETIF_F_ONE_FOR_ALL;
1904	features |= NETIF_F_ALL_FOR_ALL;
1905
1906	rcu_read_lock();
1907	list_for_each_entry_rcu(port, &team->port_list, list) {
1908		features = netdev_increment_features(features,
1909						     port->dev->features,
1910						     mask);
1911	}
1912	rcu_read_unlock();
 
 
 
1913	return features;
1914}
1915
1916static int team_change_carrier(struct net_device *dev, bool new_carrier)
1917{
1918	struct team *team = netdev_priv(dev);
1919
1920	team->user_carrier_enabled = true;
1921
1922	if (new_carrier)
1923		netif_carrier_on(dev);
1924	else
1925		netif_carrier_off(dev);
1926	return 0;
1927}
1928
1929static const struct net_device_ops team_netdev_ops = {
1930	.ndo_init		= team_init,
1931	.ndo_uninit		= team_uninit,
1932	.ndo_open		= team_open,
1933	.ndo_stop		= team_close,
1934	.ndo_start_xmit		= team_xmit,
1935	.ndo_select_queue	= team_select_queue,
1936	.ndo_change_rx_flags	= team_change_rx_flags,
1937	.ndo_set_rx_mode	= team_set_rx_mode,
1938	.ndo_set_mac_address	= team_set_mac_address,
1939	.ndo_change_mtu		= team_change_mtu,
1940	.ndo_get_stats64	= team_get_stats64,
1941	.ndo_vlan_rx_add_vid	= team_vlan_rx_add_vid,
1942	.ndo_vlan_rx_kill_vid	= team_vlan_rx_kill_vid,
1943#ifdef CONFIG_NET_POLL_CONTROLLER
1944	.ndo_poll_controller	= team_poll_controller,
1945	.ndo_netpoll_setup	= team_netpoll_setup,
1946	.ndo_netpoll_cleanup	= team_netpoll_cleanup,
1947#endif
1948	.ndo_add_slave		= team_add_slave,
1949	.ndo_del_slave		= team_del_slave,
1950	.ndo_fix_features	= team_fix_features,
1951	.ndo_change_carrier     = team_change_carrier,
 
1952};
1953
1954/***********************
1955 * ethtool interface
1956 ***********************/
1957
1958static void team_ethtool_get_drvinfo(struct net_device *dev,
1959				     struct ethtool_drvinfo *drvinfo)
1960{
1961	strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
1962	strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
1963}
1964
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1965static const struct ethtool_ops team_ethtool_ops = {
1966	.get_drvinfo		= team_ethtool_get_drvinfo,
1967	.get_link		= ethtool_op_get_link,
 
1968};
1969
1970/***********************
1971 * rt netlink interface
1972 ***********************/
1973
1974static void team_setup_by_port(struct net_device *dev,
1975			       struct net_device *port_dev)
1976{
1977	dev->header_ops	= port_dev->header_ops;
1978	dev->type = port_dev->type;
1979	dev->hard_header_len = port_dev->hard_header_len;
1980	dev->addr_len = port_dev->addr_len;
1981	dev->mtu = port_dev->mtu;
1982	memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
1983	eth_hw_addr_inherit(dev, port_dev);
1984}
1985
1986static int team_dev_type_check_change(struct net_device *dev,
1987				      struct net_device *port_dev)
1988{
1989	struct team *team = netdev_priv(dev);
1990	char *portname = port_dev->name;
1991	int err;
1992
1993	if (dev->type == port_dev->type)
1994		return 0;
1995	if (!list_empty(&team->port_list)) {
1996		netdev_err(dev, "Device %s is of different type\n", portname);
1997		return -EBUSY;
1998	}
1999	err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2000	err = notifier_to_errno(err);
2001	if (err) {
2002		netdev_err(dev, "Refused to change device type\n");
2003		return err;
2004	}
2005	dev_uc_flush(dev);
2006	dev_mc_flush(dev);
2007	team_setup_by_port(dev, port_dev);
2008	call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2009	return 0;
2010}
2011
2012static void team_setup(struct net_device *dev)
2013{
2014	ether_setup(dev);
 
2015
2016	dev->netdev_ops = &team_netdev_ops;
2017	dev->ethtool_ops = &team_ethtool_ops;
2018	dev->destructor	= team_destructor;
2019	dev->tx_queue_len = 0;
2020	dev->flags |= IFF_MULTICAST;
2021	dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
 
 
2022
2023	/*
2024	 * Indicate we support unicast address filtering. That way core won't
2025	 * bring us to promisc mode in case a unicast addr is added.
2026	 * Let this up to underlay drivers.
2027	 */
2028	dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2029
2030	dev->features |= NETIF_F_LLTX;
2031	dev->features |= NETIF_F_GRO;
2032
2033	/* Don't allow team devices to change network namespaces. */
2034	dev->features |= NETIF_F_NETNS_LOCAL;
2035
2036	dev->hw_features = TEAM_VLAN_FEATURES |
2037			   NETIF_F_HW_VLAN_CTAG_TX |
2038			   NETIF_F_HW_VLAN_CTAG_RX |
2039			   NETIF_F_HW_VLAN_CTAG_FILTER;
2040
2041	dev->hw_features &= ~(NETIF_F_ALL_CSUM & ~NETIF_F_HW_CSUM);
2042	dev->features |= dev->hw_features;
 
2043}
2044
2045static int team_newlink(struct net *src_net, struct net_device *dev,
2046			struct nlattr *tb[], struct nlattr *data[])
 
2047{
2048	int err;
2049
2050	if (tb[IFLA_ADDRESS] == NULL)
2051		eth_hw_addr_random(dev);
2052
2053	err = register_netdevice(dev);
2054	if (err)
2055		return err;
2056
2057	return 0;
2058}
2059
2060static int team_validate(struct nlattr *tb[], struct nlattr *data[])
 
2061{
2062	if (tb[IFLA_ADDRESS]) {
2063		if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2064			return -EINVAL;
2065		if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2066			return -EADDRNOTAVAIL;
2067	}
2068	return 0;
2069}
2070
2071static unsigned int team_get_num_tx_queues(void)
2072{
2073	return TEAM_DEFAULT_NUM_TX_QUEUES;
2074}
2075
2076static unsigned int team_get_num_rx_queues(void)
2077{
2078	return TEAM_DEFAULT_NUM_RX_QUEUES;
2079}
2080
2081static struct rtnl_link_ops team_link_ops __read_mostly = {
2082	.kind			= DRV_NAME,
2083	.priv_size		= sizeof(struct team),
2084	.setup			= team_setup,
2085	.newlink		= team_newlink,
2086	.validate		= team_validate,
2087	.get_num_tx_queues	= team_get_num_tx_queues,
2088	.get_num_rx_queues	= team_get_num_rx_queues,
2089};
2090
2091
2092/***********************************
2093 * Generic netlink custom interface
2094 ***********************************/
2095
2096static struct genl_family team_nl_family = {
2097	.id		= GENL_ID_GENERATE,
2098	.name		= TEAM_GENL_NAME,
2099	.version	= TEAM_GENL_VERSION,
2100	.maxattr	= TEAM_ATTR_MAX,
2101	.netnsok	= true,
2102};
2103
2104static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2105	[TEAM_ATTR_UNSPEC]			= { .type = NLA_UNSPEC, },
2106	[TEAM_ATTR_TEAM_IFINDEX]		= { .type = NLA_U32 },
2107	[TEAM_ATTR_LIST_OPTION]			= { .type = NLA_NESTED },
2108	[TEAM_ATTR_LIST_PORT]			= { .type = NLA_NESTED },
2109};
2110
2111static const struct nla_policy
2112team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2113	[TEAM_ATTR_OPTION_UNSPEC]		= { .type = NLA_UNSPEC, },
2114	[TEAM_ATTR_OPTION_NAME] = {
2115		.type = NLA_STRING,
2116		.len = TEAM_STRING_MAX_LEN,
2117	},
2118	[TEAM_ATTR_OPTION_CHANGED]		= { .type = NLA_FLAG },
2119	[TEAM_ATTR_OPTION_TYPE]			= { .type = NLA_U8 },
2120	[TEAM_ATTR_OPTION_DATA]			= { .type = NLA_BINARY },
2121};
2122
2123static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2124{
2125	struct sk_buff *msg;
2126	void *hdr;
2127	int err;
2128
2129	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2130	if (!msg)
2131		return -ENOMEM;
2132
2133	hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2134			  &team_nl_family, 0, TEAM_CMD_NOOP);
2135	if (!hdr) {
2136		err = -EMSGSIZE;
2137		goto err_msg_put;
2138	}
2139
2140	genlmsg_end(msg, hdr);
2141
2142	return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2143
2144err_msg_put:
2145	nlmsg_free(msg);
2146
2147	return err;
2148}
2149
2150/*
2151 * Netlink cmd functions should be locked by following two functions.
2152 * Since dev gets held here, that ensures dev won't disappear in between.
2153 */
2154static struct team *team_nl_team_get(struct genl_info *info)
2155{
2156	struct net *net = genl_info_net(info);
2157	int ifindex;
2158	struct net_device *dev;
2159	struct team *team;
2160
2161	if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2162		return NULL;
2163
2164	ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2165	dev = dev_get_by_index(net, ifindex);
2166	if (!dev || dev->netdev_ops != &team_netdev_ops) {
2167		if (dev)
2168			dev_put(dev);
2169		return NULL;
2170	}
2171
2172	team = netdev_priv(dev);
2173	mutex_lock(&team->lock);
2174	return team;
2175}
2176
2177static void team_nl_team_put(struct team *team)
2178{
2179	mutex_unlock(&team->lock);
2180	dev_put(team->dev);
2181}
2182
2183typedef int team_nl_send_func_t(struct sk_buff *skb,
2184				struct team *team, u32 portid);
2185
2186static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2187{
2188	return genlmsg_unicast(dev_net(team->dev), skb, portid);
2189}
2190
2191static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2192				       struct team_option_inst *opt_inst)
2193{
2194	struct nlattr *option_item;
2195	struct team_option *option = opt_inst->option;
2196	struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2197	struct team_gsetter_ctx ctx;
2198	int err;
2199
2200	ctx.info = opt_inst_info;
2201	err = team_option_get(team, opt_inst, &ctx);
2202	if (err)
2203		return err;
2204
2205	option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
2206	if (!option_item)
2207		return -EMSGSIZE;
2208
2209	if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2210		goto nest_cancel;
2211	if (opt_inst_info->port &&
2212	    nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2213			opt_inst_info->port->dev->ifindex))
2214		goto nest_cancel;
2215	if (opt_inst->option->array_size &&
2216	    nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2217			opt_inst_info->array_index))
2218		goto nest_cancel;
2219
2220	switch (option->type) {
2221	case TEAM_OPTION_TYPE_U32:
2222		if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2223			goto nest_cancel;
2224		if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2225			goto nest_cancel;
2226		break;
2227	case TEAM_OPTION_TYPE_STRING:
2228		if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2229			goto nest_cancel;
2230		if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2231				   ctx.data.str_val))
2232			goto nest_cancel;
2233		break;
2234	case TEAM_OPTION_TYPE_BINARY:
2235		if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2236			goto nest_cancel;
2237		if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2238			    ctx.data.bin_val.ptr))
2239			goto nest_cancel;
2240		break;
2241	case TEAM_OPTION_TYPE_BOOL:
2242		if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2243			goto nest_cancel;
2244		if (ctx.data.bool_val &&
2245		    nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2246			goto nest_cancel;
2247		break;
2248	case TEAM_OPTION_TYPE_S32:
2249		if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2250			goto nest_cancel;
2251		if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2252			goto nest_cancel;
2253		break;
2254	default:
2255		BUG();
2256	}
2257	if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2258		goto nest_cancel;
2259	if (opt_inst->changed) {
2260		if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2261			goto nest_cancel;
2262		opt_inst->changed = false;
2263	}
2264	nla_nest_end(skb, option_item);
2265	return 0;
2266
2267nest_cancel:
2268	nla_nest_cancel(skb, option_item);
2269	return -EMSGSIZE;
2270}
2271
2272static int __send_and_alloc_skb(struct sk_buff **pskb,
2273				struct team *team, u32 portid,
2274				team_nl_send_func_t *send_func)
2275{
2276	int err;
2277
2278	if (*pskb) {
2279		err = send_func(*pskb, team, portid);
2280		if (err)
2281			return err;
2282	}
2283	*pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2284	if (!*pskb)
2285		return -ENOMEM;
2286	return 0;
2287}
2288
2289static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2290				    int flags, team_nl_send_func_t *send_func,
2291				    struct list_head *sel_opt_inst_list)
2292{
2293	struct nlattr *option_list;
2294	struct nlmsghdr *nlh;
2295	void *hdr;
2296	struct team_option_inst *opt_inst;
2297	int err;
2298	struct sk_buff *skb = NULL;
2299	bool incomplete;
2300	int i;
2301
2302	opt_inst = list_first_entry(sel_opt_inst_list,
2303				    struct team_option_inst, tmp_list);
2304
2305start_again:
2306	err = __send_and_alloc_skb(&skb, team, portid, send_func);
2307	if (err)
2308		return err;
2309
2310	hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2311			  TEAM_CMD_OPTIONS_GET);
2312	if (!hdr)
 
2313		return -EMSGSIZE;
 
2314
2315	if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2316		goto nla_put_failure;
2317	option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2318	if (!option_list)
2319		goto nla_put_failure;
2320
2321	i = 0;
2322	incomplete = false;
2323	list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2324		err = team_nl_fill_one_option_get(skb, team, opt_inst);
2325		if (err) {
2326			if (err == -EMSGSIZE) {
2327				if (!i)
2328					goto errout;
2329				incomplete = true;
2330				break;
2331			}
2332			goto errout;
2333		}
2334		i++;
2335	}
2336
2337	nla_nest_end(skb, option_list);
2338	genlmsg_end(skb, hdr);
2339	if (incomplete)
2340		goto start_again;
2341
2342send_done:
2343	nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2344	if (!nlh) {
2345		err = __send_and_alloc_skb(&skb, team, portid, send_func);
2346		if (err)
2347			goto errout;
2348		goto send_done;
2349	}
2350
2351	return send_func(skb, team, portid);
2352
2353nla_put_failure:
2354	err = -EMSGSIZE;
2355errout:
2356	genlmsg_cancel(skb, hdr);
2357	nlmsg_free(skb);
2358	return err;
2359}
2360
2361static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2362{
2363	struct team *team;
2364	struct team_option_inst *opt_inst;
2365	int err;
2366	LIST_HEAD(sel_opt_inst_list);
2367
2368	team = team_nl_team_get(info);
2369	if (!team)
2370		return -EINVAL;
2371
2372	list_for_each_entry(opt_inst, &team->option_inst_list, list)
2373		list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2374	err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2375				       NLM_F_ACK, team_nl_send_unicast,
2376				       &sel_opt_inst_list);
2377
2378	team_nl_team_put(team);
2379
2380	return err;
2381}
2382
2383static int team_nl_send_event_options_get(struct team *team,
2384					  struct list_head *sel_opt_inst_list);
2385
2386static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2387{
2388	struct team *team;
2389	int err = 0;
2390	int i;
2391	struct nlattr *nl_option;
2392	LIST_HEAD(opt_inst_list);
 
2393
2394	team = team_nl_team_get(info);
2395	if (!team)
2396		return -EINVAL;
 
 
2397
2398	err = -EINVAL;
2399	if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2400		err = -EINVAL;
2401		goto team_put;
2402	}
2403
2404	nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2405		struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2406		struct nlattr *attr;
2407		struct nlattr *attr_data;
 
2408		enum team_option_type opt_type;
2409		int opt_port_ifindex = 0; /* != 0 for per-port options */
2410		u32 opt_array_index = 0;
2411		bool opt_is_array = false;
2412		struct team_option_inst *opt_inst;
2413		char *opt_name;
2414		bool opt_found = false;
2415
2416		if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2417			err = -EINVAL;
2418			goto team_put;
2419		}
2420		err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2421				       nl_option, team_nl_option_policy);
 
 
 
2422		if (err)
2423			goto team_put;
2424		if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2425		    !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2426			err = -EINVAL;
2427			goto team_put;
2428		}
2429		switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2430		case NLA_U32:
2431			opt_type = TEAM_OPTION_TYPE_U32;
2432			break;
2433		case NLA_STRING:
2434			opt_type = TEAM_OPTION_TYPE_STRING;
2435			break;
2436		case NLA_BINARY:
2437			opt_type = TEAM_OPTION_TYPE_BINARY;
2438			break;
2439		case NLA_FLAG:
2440			opt_type = TEAM_OPTION_TYPE_BOOL;
2441			break;
2442		case NLA_S32:
2443			opt_type = TEAM_OPTION_TYPE_S32;
2444			break;
2445		default:
2446			goto team_put;
2447		}
2448
2449		attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2450		if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2451			err = -EINVAL;
2452			goto team_put;
2453		}
2454
2455		opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2456		attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2457		if (attr)
2458			opt_port_ifindex = nla_get_u32(attr);
2459
2460		attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2461		if (attr) {
2462			opt_is_array = true;
2463			opt_array_index = nla_get_u32(attr);
2464		}
2465
2466		list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2467			struct team_option *option = opt_inst->option;
2468			struct team_gsetter_ctx ctx;
2469			struct team_option_inst_info *opt_inst_info;
2470			int tmp_ifindex;
2471
2472			opt_inst_info = &opt_inst->info;
2473			tmp_ifindex = opt_inst_info->port ?
2474				      opt_inst_info->port->dev->ifindex : 0;
2475			if (option->type != opt_type ||
2476			    strcmp(option->name, opt_name) ||
2477			    tmp_ifindex != opt_port_ifindex ||
2478			    (option->array_size && !opt_is_array) ||
2479			    opt_inst_info->array_index != opt_array_index)
2480				continue;
2481			opt_found = true;
2482			ctx.info = opt_inst_info;
2483			switch (opt_type) {
2484			case TEAM_OPTION_TYPE_U32:
2485				ctx.data.u32_val = nla_get_u32(attr_data);
2486				break;
2487			case TEAM_OPTION_TYPE_STRING:
2488				if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2489					err = -EINVAL;
2490					goto team_put;
2491				}
2492				ctx.data.str_val = nla_data(attr_data);
2493				break;
2494			case TEAM_OPTION_TYPE_BINARY:
2495				ctx.data.bin_val.len = nla_len(attr_data);
2496				ctx.data.bin_val.ptr = nla_data(attr_data);
2497				break;
2498			case TEAM_OPTION_TYPE_BOOL:
2499				ctx.data.bool_val = attr_data ? true : false;
2500				break;
2501			case TEAM_OPTION_TYPE_S32:
2502				ctx.data.s32_val = nla_get_s32(attr_data);
2503				break;
2504			default:
2505				BUG();
2506			}
2507			err = team_option_set(team, opt_inst, &ctx);
2508			if (err)
2509				goto team_put;
2510			opt_inst->changed = true;
2511			list_add(&opt_inst->tmp_list, &opt_inst_list);
2512		}
2513		if (!opt_found) {
2514			err = -ENOENT;
2515			goto team_put;
2516		}
2517	}
2518
2519	err = team_nl_send_event_options_get(team, &opt_inst_list);
 
 
 
2520
2521team_put:
2522	team_nl_team_put(team);
2523
 
2524	return err;
2525}
2526
2527static int team_nl_fill_one_port_get(struct sk_buff *skb,
2528				     struct team_port *port)
2529{
2530	struct nlattr *port_item;
2531
2532	port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2533	if (!port_item)
2534		goto nest_cancel;
2535	if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2536		goto nest_cancel;
2537	if (port->changed) {
2538		if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2539			goto nest_cancel;
2540		port->changed = false;
2541	}
2542	if ((port->removed &&
2543	     nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2544	    (port->state.linkup &&
2545	     nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2546	    nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2547	    nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2548		goto nest_cancel;
2549	nla_nest_end(skb, port_item);
2550	return 0;
2551
2552nest_cancel:
2553	nla_nest_cancel(skb, port_item);
2554	return -EMSGSIZE;
2555}
2556
2557static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2558				      int flags, team_nl_send_func_t *send_func,
2559				      struct team_port *one_port)
2560{
2561	struct nlattr *port_list;
2562	struct nlmsghdr *nlh;
2563	void *hdr;
2564	struct team_port *port;
2565	int err;
2566	struct sk_buff *skb = NULL;
2567	bool incomplete;
2568	int i;
2569
2570	port = list_first_entry_or_null(&team->port_list,
2571					struct team_port, list);
2572
2573start_again:
2574	err = __send_and_alloc_skb(&skb, team, portid, send_func);
2575	if (err)
2576		return err;
2577
2578	hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2579			  TEAM_CMD_PORT_LIST_GET);
2580	if (!hdr)
 
2581		return -EMSGSIZE;
 
2582
2583	if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2584		goto nla_put_failure;
2585	port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2586	if (!port_list)
2587		goto nla_put_failure;
2588
2589	i = 0;
2590	incomplete = false;
2591
2592	/* If one port is selected, called wants to send port list containing
2593	 * only this port. Otherwise go through all listed ports and send all
2594	 */
2595	if (one_port) {
2596		err = team_nl_fill_one_port_get(skb, one_port);
2597		if (err)
2598			goto errout;
2599	} else if (port) {
2600		list_for_each_entry_from(port, &team->port_list, list) {
2601			err = team_nl_fill_one_port_get(skb, port);
2602			if (err) {
2603				if (err == -EMSGSIZE) {
2604					if (!i)
2605						goto errout;
2606					incomplete = true;
2607					break;
2608				}
2609				goto errout;
2610			}
2611			i++;
2612		}
2613	}
2614
2615	nla_nest_end(skb, port_list);
2616	genlmsg_end(skb, hdr);
2617	if (incomplete)
2618		goto start_again;
2619
2620send_done:
2621	nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2622	if (!nlh) {
2623		err = __send_and_alloc_skb(&skb, team, portid, send_func);
2624		if (err)
2625			goto errout;
2626		goto send_done;
2627	}
2628
2629	return send_func(skb, team, portid);
2630
2631nla_put_failure:
2632	err = -EMSGSIZE;
2633errout:
2634	genlmsg_cancel(skb, hdr);
2635	nlmsg_free(skb);
2636	return err;
2637}
2638
2639static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2640				     struct genl_info *info)
2641{
2642	struct team *team;
2643	int err;
2644
2645	team = team_nl_team_get(info);
2646	if (!team)
2647		return -EINVAL;
2648
2649	err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2650					 NLM_F_ACK, team_nl_send_unicast, NULL);
2651
2652	team_nl_team_put(team);
2653
2654	return err;
2655}
2656
2657static const struct genl_ops team_nl_ops[] = {
2658	{
2659		.cmd = TEAM_CMD_NOOP,
 
2660		.doit = team_nl_cmd_noop,
2661		.policy = team_nl_policy,
2662	},
2663	{
2664		.cmd = TEAM_CMD_OPTIONS_SET,
 
2665		.doit = team_nl_cmd_options_set,
2666		.policy = team_nl_policy,
2667		.flags = GENL_ADMIN_PERM,
2668	},
2669	{
2670		.cmd = TEAM_CMD_OPTIONS_GET,
 
2671		.doit = team_nl_cmd_options_get,
2672		.policy = team_nl_policy,
2673		.flags = GENL_ADMIN_PERM,
2674	},
2675	{
2676		.cmd = TEAM_CMD_PORT_LIST_GET,
 
2677		.doit = team_nl_cmd_port_list_get,
2678		.policy = team_nl_policy,
2679		.flags = GENL_ADMIN_PERM,
2680	},
2681};
2682
2683static const struct genl_multicast_group team_nl_mcgrps[] = {
2684	{ .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2685};
2686
 
 
 
 
 
 
 
 
 
 
 
 
 
2687static int team_nl_send_multicast(struct sk_buff *skb,
2688				  struct team *team, u32 portid)
2689{
2690	return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2691				       skb, 0, 0, GFP_KERNEL);
2692}
2693
2694static int team_nl_send_event_options_get(struct team *team,
2695					  struct list_head *sel_opt_inst_list)
2696{
2697	return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2698					sel_opt_inst_list);
2699}
2700
2701static int team_nl_send_event_port_get(struct team *team,
2702				       struct team_port *port)
2703{
2704	return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2705					  port);
2706}
2707
2708static int team_nl_init(void)
2709{
2710	return genl_register_family_with_ops_groups(&team_nl_family, team_nl_ops,
2711						    team_nl_mcgrps);
2712}
2713
2714static void team_nl_fini(void)
2715{
2716	genl_unregister_family(&team_nl_family);
2717}
2718
2719
2720/******************
2721 * Change checkers
2722 ******************/
2723
2724static void __team_options_change_check(struct team *team)
2725{
2726	int err;
2727	struct team_option_inst *opt_inst;
2728	LIST_HEAD(sel_opt_inst_list);
2729
2730	list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2731		if (opt_inst->changed)
2732			list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2733	}
2734	err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2735	if (err && err != -ESRCH)
2736		netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2737			    err);
2738}
2739
2740/* rtnl lock is held */
2741
2742static void __team_port_change_send(struct team_port *port, bool linkup)
2743{
2744	int err;
2745
2746	port->changed = true;
2747	port->state.linkup = linkup;
2748	team_refresh_port_linkup(port);
2749	if (linkup) {
2750		struct ethtool_cmd ecmd;
2751
2752		err = __ethtool_get_settings(port->dev, &ecmd);
2753		if (!err) {
2754			port->state.speed = ethtool_cmd_speed(&ecmd);
2755			port->state.duplex = ecmd.duplex;
2756			goto send_event;
2757		}
2758	}
2759	port->state.speed = 0;
2760	port->state.duplex = 0;
2761
2762send_event:
2763	err = team_nl_send_event_port_get(port->team, port);
2764	if (err && err != -ESRCH)
2765		netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2766			    port->dev->name, err);
2767
2768}
2769
2770static void __team_carrier_check(struct team *team)
2771{
2772	struct team_port *port;
2773	bool team_linkup;
2774
2775	if (team->user_carrier_enabled)
2776		return;
2777
2778	team_linkup = false;
2779	list_for_each_entry(port, &team->port_list, list) {
2780		if (port->linkup) {
2781			team_linkup = true;
2782			break;
2783		}
2784	}
2785
2786	if (team_linkup)
2787		netif_carrier_on(team->dev);
2788	else
2789		netif_carrier_off(team->dev);
2790}
2791
2792static void __team_port_change_check(struct team_port *port, bool linkup)
2793{
2794	if (port->state.linkup != linkup)
2795		__team_port_change_send(port, linkup);
2796	__team_carrier_check(port->team);
2797}
2798
2799static void __team_port_change_port_added(struct team_port *port, bool linkup)
2800{
2801	__team_port_change_send(port, linkup);
2802	__team_carrier_check(port->team);
2803}
2804
2805static void __team_port_change_port_removed(struct team_port *port)
2806{
2807	port->removed = true;
2808	__team_port_change_send(port, false);
2809	__team_carrier_check(port->team);
2810}
2811
2812static void team_port_change_check(struct team_port *port, bool linkup)
2813{
2814	struct team *team = port->team;
2815
2816	mutex_lock(&team->lock);
2817	__team_port_change_check(port, linkup);
2818	mutex_unlock(&team->lock);
2819}
2820
2821
2822/************************************
2823 * Net device notifier event handler
2824 ************************************/
2825
2826static int team_device_event(struct notifier_block *unused,
2827			     unsigned long event, void *ptr)
2828{
2829	struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2830	struct team_port *port;
2831
2832	port = team_port_get_rtnl(dev);
2833	if (!port)
2834		return NOTIFY_DONE;
2835
2836	switch (event) {
2837	case NETDEV_UP:
2838		if (netif_carrier_ok(dev))
2839			team_port_change_check(port, true);
2840		break;
2841	case NETDEV_DOWN:
2842		team_port_change_check(port, false);
2843		break;
2844	case NETDEV_CHANGE:
2845		if (netif_running(port->dev))
2846			team_port_change_check(port,
2847					       !!netif_carrier_ok(port->dev));
2848		break;
2849	case NETDEV_UNREGISTER:
2850		team_del_slave(port->team->dev, dev);
2851		break;
2852	case NETDEV_FEAT_CHANGE:
2853		team_compute_features(port->team);
2854		break;
2855	case NETDEV_PRECHANGEMTU:
2856		/* Forbid to change mtu of underlaying device */
2857		if (!port->team->port_mtu_change_allowed)
2858			return NOTIFY_BAD;
2859		break;
2860	case NETDEV_PRE_TYPE_CHANGE:
2861		/* Forbid to change type of underlaying device */
2862		return NOTIFY_BAD;
2863	case NETDEV_RESEND_IGMP:
2864		/* Propagate to master device */
2865		call_netdevice_notifiers(event, port->team->dev);
2866		break;
2867	}
2868	return NOTIFY_DONE;
2869}
2870
2871static struct notifier_block team_notifier_block __read_mostly = {
2872	.notifier_call = team_device_event,
2873};
2874
2875
2876/***********************
2877 * Module init and exit
2878 ***********************/
2879
2880static int __init team_module_init(void)
2881{
2882	int err;
2883
2884	register_netdevice_notifier(&team_notifier_block);
2885
2886	err = rtnl_link_register(&team_link_ops);
2887	if (err)
2888		goto err_rtnl_reg;
2889
2890	err = team_nl_init();
2891	if (err)
2892		goto err_nl_init;
2893
2894	return 0;
2895
2896err_nl_init:
2897	rtnl_link_unregister(&team_link_ops);
2898
2899err_rtnl_reg:
2900	unregister_netdevice_notifier(&team_notifier_block);
2901
2902	return err;
2903}
2904
2905static void __exit team_module_exit(void)
2906{
2907	team_nl_fini();
2908	rtnl_link_unregister(&team_link_ops);
2909	unregister_netdevice_notifier(&team_notifier_block);
2910}
2911
2912module_init(team_module_init);
2913module_exit(team_module_exit);
2914
2915MODULE_LICENSE("GPL v2");
2916MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
2917MODULE_DESCRIPTION("Ethernet team device driver");
2918MODULE_ALIAS_RTNL_LINK(DRV_NAME);