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 <net/switchdev.h>
  32#include <generated/utsrelease.h>
  33#include <linux/if_team.h>
  34
  35#define DRV_NAME "team"
  36
  37
  38/**********
  39 * Helpers
  40 **********/
  41
  42#define team_port_exists(dev) (dev->priv_flags & IFF_TEAM_PORT)
  43
  44static struct team_port *team_port_get_rcu(const struct net_device *dev)
  45{
  46	return rcu_dereference(dev->rx_handler_data);
  47}
  48
  49static struct team_port *team_port_get_rtnl(const struct net_device *dev)
  50{
  51	struct team_port *port = rtnl_dereference(dev->rx_handler_data);
  52
  53	return team_port_exists(dev) ? port : NULL;
  54}
  55
  56/*
  57 * Since the ability to change device address for open port device is tested in
  58 * team_port_add, this function can be called without control of return value
  59 */
  60static int __set_port_dev_addr(struct net_device *port_dev,
  61			       const unsigned char *dev_addr)
  62{
  63	struct sockaddr_storage addr;
  64
  65	memcpy(addr.__data, dev_addr, port_dev->addr_len);
  66	addr.ss_family = port_dev->type;
  67	return dev_set_mac_address(port_dev, (struct sockaddr *)&addr);
  68}
  69
  70static int team_port_set_orig_dev_addr(struct team_port *port)
  71{
  72	return __set_port_dev_addr(port->dev, port->orig.dev_addr);
  73}
  74
  75static int team_port_set_team_dev_addr(struct team *team,
  76				       struct team_port *port)
  77{
  78	return __set_port_dev_addr(port->dev, team->dev->dev_addr);
  79}
  80
  81int team_modeop_port_enter(struct team *team, struct team_port *port)
  82{
  83	return team_port_set_team_dev_addr(team, port);
  84}
  85EXPORT_SYMBOL(team_modeop_port_enter);
  86
  87void team_modeop_port_change_dev_addr(struct team *team,
  88				      struct team_port *port)
  89{
  90	team_port_set_team_dev_addr(team, port);
  91}
  92EXPORT_SYMBOL(team_modeop_port_change_dev_addr);
  93
  94static void team_lower_state_changed(struct team_port *port)
  95{
  96	struct netdev_lag_lower_state_info info;
  97
  98	info.link_up = port->linkup;
  99	info.tx_enabled = team_port_enabled(port);
 100	netdev_lower_state_changed(port->dev, &info);
 101}
 102
 103static void team_refresh_port_linkup(struct team_port *port)
 104{
 105	bool new_linkup = port->user.linkup_enabled ? port->user.linkup :
 106						      port->state.linkup;
 107
 108	if (port->linkup != new_linkup) {
 109		port->linkup = new_linkup;
 110		team_lower_state_changed(port);
 111	}
 112}
 113
 114
 115/*******************
 116 * Options handling
 117 *******************/
 118
 119struct team_option_inst { /* One for each option instance */
 120	struct list_head list;
 121	struct list_head tmp_list;
 122	struct team_option *option;
 123	struct team_option_inst_info info;
 124	bool changed;
 125	bool removed;
 126};
 127
 128static struct team_option *__team_find_option(struct team *team,
 129					      const char *opt_name)
 130{
 131	struct team_option *option;
 132
 133	list_for_each_entry(option, &team->option_list, list) {
 134		if (strcmp(option->name, opt_name) == 0)
 135			return option;
 136	}
 137	return NULL;
 138}
 139
 140static void __team_option_inst_del(struct team_option_inst *opt_inst)
 141{
 142	list_del(&opt_inst->list);
 143	kfree(opt_inst);
 144}
 145
 146static void __team_option_inst_del_option(struct team *team,
 147					  struct team_option *option)
 148{
 149	struct team_option_inst *opt_inst, *tmp;
 150
 151	list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 152		if (opt_inst->option == option)
 153			__team_option_inst_del(opt_inst);
 154	}
 155}
 156
 157static int __team_option_inst_add(struct team *team, struct team_option *option,
 158				  struct team_port *port)
 159{
 160	struct team_option_inst *opt_inst;
 161	unsigned int array_size;
 162	unsigned int i;
 163	int err;
 164
 165	array_size = option->array_size;
 166	if (!array_size)
 167		array_size = 1; /* No array but still need one instance */
 168
 169	for (i = 0; i < array_size; i++) {
 170		opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL);
 171		if (!opt_inst)
 172			return -ENOMEM;
 173		opt_inst->option = option;
 174		opt_inst->info.port = port;
 175		opt_inst->info.array_index = i;
 176		opt_inst->changed = true;
 177		opt_inst->removed = false;
 178		list_add_tail(&opt_inst->list, &team->option_inst_list);
 179		if (option->init) {
 180			err = option->init(team, &opt_inst->info);
 181			if (err)
 182				return err;
 183		}
 184
 185	}
 186	return 0;
 187}
 188
 189static int __team_option_inst_add_option(struct team *team,
 190					 struct team_option *option)
 191{
 192	int err;
 193
 194	if (!option->per_port) {
 195		err = __team_option_inst_add(team, option, NULL);
 196		if (err)
 197			goto inst_del_option;
 198	}
 199	return 0;
 200
 201inst_del_option:
 202	__team_option_inst_del_option(team, option);
 203	return err;
 204}
 205
 206static void __team_option_inst_mark_removed_option(struct team *team,
 207						   struct team_option *option)
 208{
 209	struct team_option_inst *opt_inst;
 210
 211	list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 212		if (opt_inst->option == option) {
 213			opt_inst->changed = true;
 214			opt_inst->removed = true;
 215		}
 216	}
 217}
 218
 219static void __team_option_inst_del_port(struct team *team,
 220					struct team_port *port)
 221{
 222	struct team_option_inst *opt_inst, *tmp;
 223
 224	list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 225		if (opt_inst->option->per_port &&
 226		    opt_inst->info.port == port)
 227			__team_option_inst_del(opt_inst);
 228	}
 229}
 230
 231static int __team_option_inst_add_port(struct team *team,
 232				       struct team_port *port)
 233{
 234	struct team_option *option;
 235	int err;
 236
 237	list_for_each_entry(option, &team->option_list, list) {
 238		if (!option->per_port)
 239			continue;
 240		err = __team_option_inst_add(team, option, port);
 241		if (err)
 242			goto inst_del_port;
 243	}
 244	return 0;
 245
 246inst_del_port:
 247	__team_option_inst_del_port(team, port);
 248	return err;
 249}
 250
 251static void __team_option_inst_mark_removed_port(struct team *team,
 252						 struct team_port *port)
 253{
 254	struct team_option_inst *opt_inst;
 255
 256	list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 257		if (opt_inst->info.port == port) {
 258			opt_inst->changed = true;
 259			opt_inst->removed = true;
 260		}
 261	}
 262}
 263
 264static bool __team_option_inst_tmp_find(const struct list_head *opts,
 265					const struct team_option_inst *needle)
 266{
 267	struct team_option_inst *opt_inst;
 268
 269	list_for_each_entry(opt_inst, opts, tmp_list)
 270		if (opt_inst == needle)
 271			return true;
 272	return false;
 273}
 274
 275static int __team_options_register(struct team *team,
 276				   const struct team_option *option,
 277				   size_t option_count)
 278{
 279	int i;
 280	struct team_option **dst_opts;
 281	int err;
 282
 283	dst_opts = kzalloc(sizeof(struct team_option *) * option_count,
 284			   GFP_KERNEL);
 285	if (!dst_opts)
 286		return -ENOMEM;
 287	for (i = 0; i < option_count; i++, option++) {
 288		if (__team_find_option(team, option->name)) {
 289			err = -EEXIST;
 290			goto alloc_rollback;
 291		}
 292		dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
 293		if (!dst_opts[i]) {
 294			err = -ENOMEM;
 295			goto alloc_rollback;
 296		}
 297	}
 298
 299	for (i = 0; i < option_count; i++) {
 300		err = __team_option_inst_add_option(team, dst_opts[i]);
 301		if (err)
 302			goto inst_rollback;
 303		list_add_tail(&dst_opts[i]->list, &team->option_list);
 304	}
 305
 306	kfree(dst_opts);
 307	return 0;
 308
 309inst_rollback:
 310	for (i--; i >= 0; i--)
 311		__team_option_inst_del_option(team, dst_opts[i]);
 
 
 312
 313	i = option_count - 1;
 314alloc_rollback:
 315	for (i--; i >= 0; i--)
 316		kfree(dst_opts[i]);
 317
 318	kfree(dst_opts);
 319	return err;
 320}
 321
 322static void __team_options_mark_removed(struct team *team,
 323					const struct team_option *option,
 324					size_t option_count)
 325{
 326	int i;
 327
 328	for (i = 0; i < option_count; i++, option++) {
 329		struct team_option *del_opt;
 330
 331		del_opt = __team_find_option(team, option->name);
 332		if (del_opt)
 333			__team_option_inst_mark_removed_option(team, del_opt);
 334	}
 335}
 336
 337static void __team_options_unregister(struct team *team,
 338				      const struct team_option *option,
 339				      size_t option_count)
 340{
 341	int i;
 342
 343	for (i = 0; i < option_count; i++, option++) {
 344		struct team_option *del_opt;
 345
 346		del_opt = __team_find_option(team, option->name);
 347		if (del_opt) {
 348			__team_option_inst_del_option(team, del_opt);
 349			list_del(&del_opt->list);
 350			kfree(del_opt);
 351		}
 352	}
 353}
 354
 355static void __team_options_change_check(struct team *team);
 356
 357int team_options_register(struct team *team,
 358			  const struct team_option *option,
 359			  size_t option_count)
 360{
 361	int err;
 362
 363	err = __team_options_register(team, option, option_count);
 364	if (err)
 365		return err;
 366	__team_options_change_check(team);
 367	return 0;
 368}
 369EXPORT_SYMBOL(team_options_register);
 370
 371void team_options_unregister(struct team *team,
 372			     const struct team_option *option,
 373			     size_t option_count)
 374{
 375	__team_options_mark_removed(team, option, option_count);
 376	__team_options_change_check(team);
 377	__team_options_unregister(team, option, option_count);
 378}
 379EXPORT_SYMBOL(team_options_unregister);
 380
 381static int team_option_get(struct team *team,
 382			   struct team_option_inst *opt_inst,
 383			   struct team_gsetter_ctx *ctx)
 384{
 385	if (!opt_inst->option->getter)
 386		return -EOPNOTSUPP;
 387	return opt_inst->option->getter(team, ctx);
 
 
 388}
 389
 390static int team_option_set(struct team *team,
 391			   struct team_option_inst *opt_inst,
 392			   struct team_gsetter_ctx *ctx)
 393{
 394	if (!opt_inst->option->setter)
 395		return -EOPNOTSUPP;
 396	return opt_inst->option->setter(team, ctx);
 397}
 398
 399void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info)
 400{
 401	struct team_option_inst *opt_inst;
 402
 403	opt_inst = container_of(opt_inst_info, struct team_option_inst, info);
 404	opt_inst->changed = true;
 405}
 406EXPORT_SYMBOL(team_option_inst_set_change);
 407
 408void team_options_change_check(struct team *team)
 409{
 410	__team_options_change_check(team);
 411}
 412EXPORT_SYMBOL(team_options_change_check);
 413
 414
 415/****************
 416 * Mode handling
 417 ****************/
 418
 419static LIST_HEAD(mode_list);
 420static DEFINE_SPINLOCK(mode_list_lock);
 421
 422struct team_mode_item {
 423	struct list_head list;
 424	const struct team_mode *mode;
 425};
 426
 427static struct team_mode_item *__find_mode(const char *kind)
 428{
 429	struct team_mode_item *mitem;
 430
 431	list_for_each_entry(mitem, &mode_list, list) {
 432		if (strcmp(mitem->mode->kind, kind) == 0)
 433			return mitem;
 434	}
 435	return NULL;
 436}
 437
 438static bool is_good_mode_name(const char *name)
 439{
 440	while (*name != '\0') {
 441		if (!isalpha(*name) && !isdigit(*name) && *name != '_')
 442			return false;
 443		name++;
 444	}
 445	return true;
 446}
 447
 448int team_mode_register(const struct team_mode *mode)
 449{
 450	int err = 0;
 451	struct team_mode_item *mitem;
 452
 453	if (!is_good_mode_name(mode->kind) ||
 454	    mode->priv_size > TEAM_MODE_PRIV_SIZE)
 455		return -EINVAL;
 456
 457	mitem = kmalloc(sizeof(*mitem), GFP_KERNEL);
 458	if (!mitem)
 459		return -ENOMEM;
 460
 461	spin_lock(&mode_list_lock);
 462	if (__find_mode(mode->kind)) {
 463		err = -EEXIST;
 464		kfree(mitem);
 465		goto unlock;
 466	}
 467	mitem->mode = mode;
 468	list_add_tail(&mitem->list, &mode_list);
 469unlock:
 470	spin_unlock(&mode_list_lock);
 471	return err;
 472}
 473EXPORT_SYMBOL(team_mode_register);
 474
 475void team_mode_unregister(const struct team_mode *mode)
 476{
 477	struct team_mode_item *mitem;
 478
 479	spin_lock(&mode_list_lock);
 480	mitem = __find_mode(mode->kind);
 481	if (mitem) {
 482		list_del_init(&mitem->list);
 483		kfree(mitem);
 484	}
 485	spin_unlock(&mode_list_lock);
 486}
 487EXPORT_SYMBOL(team_mode_unregister);
 488
 489static const struct team_mode *team_mode_get(const char *kind)
 490{
 491	struct team_mode_item *mitem;
 492	const struct team_mode *mode = NULL;
 493
 
 
 
 494	spin_lock(&mode_list_lock);
 495	mitem = __find_mode(kind);
 496	if (!mitem) {
 497		spin_unlock(&mode_list_lock);
 498		request_module("team-mode-%s", kind);
 499		spin_lock(&mode_list_lock);
 500		mitem = __find_mode(kind);
 501	}
 502	if (mitem) {
 503		mode = mitem->mode;
 504		if (!try_module_get(mode->owner))
 505			mode = NULL;
 506	}
 507
 508	spin_unlock(&mode_list_lock);
 
 509	return mode;
 510}
 511
 512static void team_mode_put(const struct team_mode *mode)
 513{
 514	module_put(mode->owner);
 515}
 516
 517static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
 518{
 519	dev_kfree_skb_any(skb);
 520	return false;
 521}
 522
 523static rx_handler_result_t team_dummy_receive(struct team *team,
 524					      struct team_port *port,
 525					      struct sk_buff *skb)
 526{
 527	return RX_HANDLER_ANOTHER;
 528}
 529
 530static const struct team_mode __team_no_mode = {
 531	.kind		= "*NOMODE*",
 532};
 533
 534static bool team_is_mode_set(struct team *team)
 535{
 536	return team->mode != &__team_no_mode;
 537}
 538
 539static void team_set_no_mode(struct team *team)
 540{
 541	team->user_carrier_enabled = false;
 542	team->mode = &__team_no_mode;
 543}
 544
 545static void team_adjust_ops(struct team *team)
 546{
 547	/*
 548	 * To avoid checks in rx/tx skb paths, ensure here that non-null and
 549	 * correct ops are always set.
 550	 */
 551
 552	if (!team->en_port_count || !team_is_mode_set(team) ||
 553	    !team->mode->ops->transmit)
 554		team->ops.transmit = team_dummy_transmit;
 555	else
 556		team->ops.transmit = team->mode->ops->transmit;
 557
 558	if (!team->en_port_count || !team_is_mode_set(team) ||
 559	    !team->mode->ops->receive)
 560		team->ops.receive = team_dummy_receive;
 561	else
 562		team->ops.receive = team->mode->ops->receive;
 563}
 564
 565/*
 566 * We can benefit from the fact that it's ensured no port is present
 567 * at the time of mode change. Therefore no packets are in fly so there's no
 568 * need to set mode operations in any special way.
 569 */
 570static int __team_change_mode(struct team *team,
 571			      const struct team_mode *new_mode)
 572{
 573	/* Check if mode was previously set and do cleanup if so */
 574	if (team_is_mode_set(team)) {
 575		void (*exit_op)(struct team *team) = team->ops.exit;
 576
 577		/* Clear ops area so no callback is called any longer */
 578		memset(&team->ops, 0, sizeof(struct team_mode_ops));
 579		team_adjust_ops(team);
 580
 581		if (exit_op)
 582			exit_op(team);
 583		team_mode_put(team->mode);
 584		team_set_no_mode(team);
 585		/* zero private data area */
 586		memset(&team->mode_priv, 0,
 587		       sizeof(struct team) - offsetof(struct team, mode_priv));
 588	}
 589
 590	if (!new_mode)
 591		return 0;
 592
 593	if (new_mode->ops->init) {
 594		int err;
 595
 596		err = new_mode->ops->init(team);
 597		if (err)
 598			return err;
 599	}
 600
 601	team->mode = new_mode;
 602	memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
 603	team_adjust_ops(team);
 604
 605	return 0;
 606}
 607
 608static int team_change_mode(struct team *team, const char *kind)
 609{
 610	const struct team_mode *new_mode;
 611	struct net_device *dev = team->dev;
 612	int err;
 613
 614	if (!list_empty(&team->port_list)) {
 615		netdev_err(dev, "No ports can be present during mode change\n");
 616		return -EBUSY;
 617	}
 618
 619	if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) {
 620		netdev_err(dev, "Unable to change to the same mode the team is in\n");
 621		return -EINVAL;
 622	}
 623
 624	new_mode = team_mode_get(kind);
 625	if (!new_mode) {
 626		netdev_err(dev, "Mode \"%s\" not found\n", kind);
 627		return -EINVAL;
 628	}
 629
 630	err = __team_change_mode(team, new_mode);
 631	if (err) {
 632		netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
 633		team_mode_put(new_mode);
 634		return err;
 635	}
 636
 637	netdev_info(dev, "Mode changed to \"%s\"\n", kind);
 638	return 0;
 639}
 640
 641
 642/*********************
 643 * Peers notification
 644 *********************/
 645
 646static void team_notify_peers_work(struct work_struct *work)
 647{
 648	struct team *team;
 649	int val;
 650
 651	team = container_of(work, struct team, notify_peers.dw.work);
 652
 653	if (!rtnl_trylock()) {
 654		schedule_delayed_work(&team->notify_peers.dw, 0);
 655		return;
 656	}
 657	val = atomic_dec_if_positive(&team->notify_peers.count_pending);
 658	if (val < 0) {
 659		rtnl_unlock();
 660		return;
 661	}
 662	call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, team->dev);
 663	rtnl_unlock();
 664	if (val)
 665		schedule_delayed_work(&team->notify_peers.dw,
 666				      msecs_to_jiffies(team->notify_peers.interval));
 667}
 668
 669static void team_notify_peers(struct team *team)
 670{
 671	if (!team->notify_peers.count || !netif_running(team->dev))
 672		return;
 673	atomic_add(team->notify_peers.count, &team->notify_peers.count_pending);
 674	schedule_delayed_work(&team->notify_peers.dw, 0);
 675}
 676
 677static void team_notify_peers_init(struct team *team)
 678{
 679	INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work);
 680}
 681
 682static void team_notify_peers_fini(struct team *team)
 683{
 684	cancel_delayed_work_sync(&team->notify_peers.dw);
 685}
 686
 687
 688/*******************************
 689 * Send multicast group rejoins
 690 *******************************/
 691
 692static void team_mcast_rejoin_work(struct work_struct *work)
 693{
 694	struct team *team;
 695	int val;
 696
 697	team = container_of(work, struct team, mcast_rejoin.dw.work);
 698
 699	if (!rtnl_trylock()) {
 700		schedule_delayed_work(&team->mcast_rejoin.dw, 0);
 701		return;
 702	}
 703	val = atomic_dec_if_positive(&team->mcast_rejoin.count_pending);
 704	if (val < 0) {
 705		rtnl_unlock();
 706		return;
 707	}
 708	call_netdevice_notifiers(NETDEV_RESEND_IGMP, team->dev);
 709	rtnl_unlock();
 710	if (val)
 711		schedule_delayed_work(&team->mcast_rejoin.dw,
 712				      msecs_to_jiffies(team->mcast_rejoin.interval));
 713}
 714
 715static void team_mcast_rejoin(struct team *team)
 716{
 717	if (!team->mcast_rejoin.count || !netif_running(team->dev))
 718		return;
 719	atomic_add(team->mcast_rejoin.count, &team->mcast_rejoin.count_pending);
 720	schedule_delayed_work(&team->mcast_rejoin.dw, 0);
 721}
 722
 723static void team_mcast_rejoin_init(struct team *team)
 724{
 725	INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work);
 726}
 727
 728static void team_mcast_rejoin_fini(struct team *team)
 729{
 730	cancel_delayed_work_sync(&team->mcast_rejoin.dw);
 731}
 732
 733
 734/************************
 735 * Rx path frame handler
 736 ************************/
 737
 738/* note: already called with rcu_read_lock */
 739static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
 740{
 741	struct sk_buff *skb = *pskb;
 742	struct team_port *port;
 743	struct team *team;
 744	rx_handler_result_t res;
 745
 746	skb = skb_share_check(skb, GFP_ATOMIC);
 747	if (!skb)
 748		return RX_HANDLER_CONSUMED;
 749
 750	*pskb = skb;
 751
 752	port = team_port_get_rcu(skb->dev);
 753	team = port->team;
 754	if (!team_port_enabled(port)) {
 
 
 
 
 
 755		/* allow exact match delivery for disabled ports */
 756		res = RX_HANDLER_EXACT;
 757	} else {
 758		res = team->ops.receive(team, port, skb);
 759	}
 760	if (res == RX_HANDLER_ANOTHER) {
 761		struct team_pcpu_stats *pcpu_stats;
 762
 763		pcpu_stats = this_cpu_ptr(team->pcpu_stats);
 764		u64_stats_update_begin(&pcpu_stats->syncp);
 765		pcpu_stats->rx_packets++;
 766		pcpu_stats->rx_bytes += skb->len;
 767		if (skb->pkt_type == PACKET_MULTICAST)
 768			pcpu_stats->rx_multicast++;
 769		u64_stats_update_end(&pcpu_stats->syncp);
 770
 771		skb->dev = team->dev;
 772	} else if (res == RX_HANDLER_EXACT) {
 773		this_cpu_inc(team->pcpu_stats->rx_nohandler);
 774	} else {
 775		this_cpu_inc(team->pcpu_stats->rx_dropped);
 776	}
 777
 778	return res;
 779}
 780
 781
 782/*************************************
 783 * Multiqueue Tx port select override
 784 *************************************/
 785
 786static int team_queue_override_init(struct team *team)
 787{
 788	struct list_head *listarr;
 789	unsigned int queue_cnt = team->dev->num_tx_queues - 1;
 790	unsigned int i;
 791
 792	if (!queue_cnt)
 793		return 0;
 794	listarr = kmalloc(sizeof(struct list_head) * queue_cnt, GFP_KERNEL);
 
 795	if (!listarr)
 796		return -ENOMEM;
 797	team->qom_lists = listarr;
 798	for (i = 0; i < queue_cnt; i++)
 799		INIT_LIST_HEAD(listarr++);
 800	return 0;
 801}
 802
 803static void team_queue_override_fini(struct team *team)
 804{
 805	kfree(team->qom_lists);
 806}
 807
 808static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
 809{
 810	return &team->qom_lists[queue_id - 1];
 811}
 812
 813/*
 814 * note: already called with rcu_read_lock
 815 */
 816static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
 817{
 818	struct list_head *qom_list;
 819	struct team_port *port;
 820
 821	if (!team->queue_override_enabled || !skb->queue_mapping)
 822		return false;
 823	qom_list = __team_get_qom_list(team, skb->queue_mapping);
 824	list_for_each_entry_rcu(port, qom_list, qom_list) {
 825		if (!team_dev_queue_xmit(team, port, skb))
 826			return true;
 827	}
 828	return false;
 829}
 830
 831static void __team_queue_override_port_del(struct team *team,
 832					   struct team_port *port)
 833{
 834	if (!port->queue_id)
 835		return;
 836	list_del_rcu(&port->qom_list);
 837}
 838
 839static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
 840						      struct team_port *cur)
 841{
 842	if (port->priority < cur->priority)
 843		return true;
 844	if (port->priority > cur->priority)
 845		return false;
 846	if (port->index < cur->index)
 847		return true;
 848	return false;
 849}
 850
 851static void __team_queue_override_port_add(struct team *team,
 852					   struct team_port *port)
 853{
 854	struct team_port *cur;
 855	struct list_head *qom_list;
 856	struct list_head *node;
 857
 858	if (!port->queue_id)
 859		return;
 860	qom_list = __team_get_qom_list(team, port->queue_id);
 861	node = qom_list;
 862	list_for_each_entry(cur, qom_list, qom_list) {
 863		if (team_queue_override_port_has_gt_prio_than(port, cur))
 864			break;
 865		node = &cur->qom_list;
 866	}
 867	list_add_tail_rcu(&port->qom_list, node);
 868}
 869
 870static void __team_queue_override_enabled_check(struct team *team)
 871{
 872	struct team_port *port;
 873	bool enabled = false;
 874
 875	list_for_each_entry(port, &team->port_list, list) {
 876		if (port->queue_id) {
 877			enabled = true;
 878			break;
 879		}
 880	}
 881	if (enabled == team->queue_override_enabled)
 882		return;
 883	netdev_dbg(team->dev, "%s queue override\n",
 884		   enabled ? "Enabling" : "Disabling");
 885	team->queue_override_enabled = enabled;
 886}
 887
 888static void team_queue_override_port_prio_changed(struct team *team,
 889						  struct team_port *port)
 890{
 891	if (!port->queue_id || team_port_enabled(port))
 892		return;
 893	__team_queue_override_port_del(team, port);
 894	__team_queue_override_port_add(team, port);
 895	__team_queue_override_enabled_check(team);
 896}
 897
 898static void team_queue_override_port_change_queue_id(struct team *team,
 899						     struct team_port *port,
 900						     u16 new_queue_id)
 901{
 902	if (team_port_enabled(port)) {
 903		__team_queue_override_port_del(team, port);
 904		port->queue_id = new_queue_id;
 905		__team_queue_override_port_add(team, port);
 906		__team_queue_override_enabled_check(team);
 907	} else {
 908		port->queue_id = new_queue_id;
 909	}
 910}
 911
 912static void team_queue_override_port_add(struct team *team,
 913					 struct team_port *port)
 914{
 915	__team_queue_override_port_add(team, port);
 916	__team_queue_override_enabled_check(team);
 917}
 918
 919static void team_queue_override_port_del(struct team *team,
 920					 struct team_port *port)
 921{
 922	__team_queue_override_port_del(team, port);
 923	__team_queue_override_enabled_check(team);
 924}
 925
 926
 927/****************
 928 * Port handling
 929 ****************/
 930
 931static bool team_port_find(const struct team *team,
 932			   const struct team_port *port)
 933{
 934	struct team_port *cur;
 935
 936	list_for_each_entry(cur, &team->port_list, list)
 937		if (cur == port)
 938			return true;
 939	return false;
 940}
 941
 942/*
 943 * Enable/disable port by adding to enabled port hashlist and setting
 944 * port->index (Might be racy so reader could see incorrect ifindex when
 945 * processing a flying packet, but that is not a problem). Write guarded
 946 * by team->lock.
 947 */
 948static void team_port_enable(struct team *team,
 949			     struct team_port *port)
 950{
 951	if (team_port_enabled(port))
 952		return;
 953	port->index = team->en_port_count++;
 954	hlist_add_head_rcu(&port->hlist,
 955			   team_port_index_hash(team, port->index));
 956	team_adjust_ops(team);
 957	team_queue_override_port_add(team, port);
 958	if (team->ops.port_enabled)
 959		team->ops.port_enabled(team, port);
 960	team_notify_peers(team);
 961	team_mcast_rejoin(team);
 962	team_lower_state_changed(port);
 963}
 964
 965static void __reconstruct_port_hlist(struct team *team, int rm_index)
 966{
 967	int i;
 968	struct team_port *port;
 969
 970	for (i = rm_index + 1; i < team->en_port_count; i++) {
 971		port = team_get_port_by_index(team, i);
 972		hlist_del_rcu(&port->hlist);
 973		port->index--;
 974		hlist_add_head_rcu(&port->hlist,
 975				   team_port_index_hash(team, port->index));
 976	}
 977}
 978
 979static void team_port_disable(struct team *team,
 980			      struct team_port *port)
 981{
 982	if (!team_port_enabled(port))
 983		return;
 984	if (team->ops.port_disabled)
 985		team->ops.port_disabled(team, port);
 986	hlist_del_rcu(&port->hlist);
 987	__reconstruct_port_hlist(team, port->index);
 988	port->index = -1;
 989	team->en_port_count--;
 990	team_queue_override_port_del(team, port);
 991	team_adjust_ops(team);
 992	team_notify_peers(team);
 993	team_mcast_rejoin(team);
 994	team_lower_state_changed(port);
 995}
 996
 997#define TEAM_VLAN_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
 998			    NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
 999			    NETIF_F_HIGHDMA | NETIF_F_LRO)
1000
1001#define TEAM_ENC_FEATURES	(NETIF_F_HW_CSUM | NETIF_F_SG | \
1002				 NETIF_F_RXCSUM | NETIF_F_ALL_TSO)
1003
1004static void __team_compute_features(struct team *team)
1005{
1006	struct team_port *port;
1007	u32 vlan_features = TEAM_VLAN_FEATURES & NETIF_F_ALL_FOR_ALL;
 
1008	netdev_features_t enc_features  = TEAM_ENC_FEATURES;
1009	unsigned short max_hard_header_len = ETH_HLEN;
1010	unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE |
1011					IFF_XMIT_DST_RELEASE_PERM;
1012
1013	list_for_each_entry(port, &team->port_list, list) {
 
1014		vlan_features = netdev_increment_features(vlan_features,
1015					port->dev->vlan_features,
1016					TEAM_VLAN_FEATURES);
1017		enc_features =
1018			netdev_increment_features(enc_features,
1019						  port->dev->hw_enc_features,
1020						  TEAM_ENC_FEATURES);
1021
1022
1023		dst_release_flag &= port->dev->priv_flags;
1024		if (port->dev->hard_header_len > max_hard_header_len)
1025			max_hard_header_len = port->dev->hard_header_len;
1026	}
 
1027
1028	team->dev->vlan_features = vlan_features;
1029	team->dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL;
 
 
1030	team->dev->hard_header_len = max_hard_header_len;
1031
1032	team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
1033	if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
1034		team->dev->priv_flags |= IFF_XMIT_DST_RELEASE;
1035}
1036
1037static void team_compute_features(struct team *team)
1038{
1039	mutex_lock(&team->lock);
1040	__team_compute_features(team);
1041	mutex_unlock(&team->lock);
1042	netdev_change_features(team->dev);
1043}
1044
1045static int team_port_enter(struct team *team, struct team_port *port)
1046{
1047	int err = 0;
1048
1049	dev_hold(team->dev);
1050	if (team->ops.port_enter) {
1051		err = team->ops.port_enter(team, port);
1052		if (err) {
1053			netdev_err(team->dev, "Device %s failed to enter team mode\n",
1054				   port->dev->name);
1055			goto err_port_enter;
1056		}
1057	}
1058
1059	return 0;
1060
1061err_port_enter:
1062	dev_put(team->dev);
1063
1064	return err;
1065}
1066
1067static void team_port_leave(struct team *team, struct team_port *port)
1068{
1069	if (team->ops.port_leave)
1070		team->ops.port_leave(team, port);
1071	dev_put(team->dev);
1072}
1073
1074#ifdef CONFIG_NET_POLL_CONTROLLER
1075static int __team_port_enable_netpoll(struct team_port *port)
1076{
1077	struct netpoll *np;
1078	int err;
1079
1080	np = kzalloc(sizeof(*np), GFP_KERNEL);
1081	if (!np)
1082		return -ENOMEM;
1083
1084	err = __netpoll_setup(np, port->dev);
1085	if (err) {
1086		kfree(np);
1087		return err;
1088	}
1089	port->np = np;
1090	return err;
1091}
1092
1093static int team_port_enable_netpoll(struct team_port *port)
1094{
1095	if (!port->team->dev->npinfo)
1096		return 0;
1097
1098	return __team_port_enable_netpoll(port);
1099}
1100
1101static void team_port_disable_netpoll(struct team_port *port)
1102{
1103	struct netpoll *np = port->np;
1104
1105	if (!np)
1106		return;
1107	port->np = NULL;
1108
1109	/* Wait for transmitting packets to finish before freeing. */
1110	synchronize_rcu_bh();
1111	__netpoll_cleanup(np);
1112	kfree(np);
1113}
1114#else
1115static int team_port_enable_netpoll(struct team_port *port)
1116{
1117	return 0;
1118}
1119static void team_port_disable_netpoll(struct team_port *port)
1120{
1121}
1122#endif
1123
1124static int team_upper_dev_link(struct team *team, struct team_port *port,
1125			       struct netlink_ext_ack *extack)
1126{
1127	struct netdev_lag_upper_info lag_upper_info;
1128	int err;
1129
1130	lag_upper_info.tx_type = team->mode->lag_tx_type;
 
1131	err = netdev_master_upper_dev_link(port->dev, team->dev, NULL,
1132					   &lag_upper_info, extack);
1133	if (err)
1134		return err;
1135	port->dev->priv_flags |= IFF_TEAM_PORT;
1136	return 0;
1137}
1138
1139static void team_upper_dev_unlink(struct team *team, struct team_port *port)
1140{
1141	netdev_upper_dev_unlink(port->dev, team->dev);
1142	port->dev->priv_flags &= ~IFF_TEAM_PORT;
1143}
1144
1145static void __team_port_change_port_added(struct team_port *port, bool linkup);
1146static int team_dev_type_check_change(struct net_device *dev,
1147				      struct net_device *port_dev);
1148
1149static int team_port_add(struct team *team, struct net_device *port_dev,
1150			 struct netlink_ext_ack *extack)
1151{
1152	struct net_device *dev = team->dev;
1153	struct team_port *port;
1154	char *portname = port_dev->name;
1155	int err;
1156
1157	if (port_dev->flags & IFF_LOOPBACK) {
1158		NL_SET_ERR_MSG(extack, "Loopback device can't be added as a team port");
1159		netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1160			   portname);
1161		return -EINVAL;
1162	}
1163
1164	if (team_port_exists(port_dev)) {
1165		NL_SET_ERR_MSG(extack, "Device is already a port of a team device");
1166		netdev_err(dev, "Device %s is already a port "
1167				"of a team device\n", portname);
1168		return -EBUSY;
1169	}
1170
 
 
 
 
 
 
 
 
 
 
 
 
 
1171	if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1172	    vlan_uses_dev(dev)) {
1173		NL_SET_ERR_MSG(extack, "Device is VLAN challenged and team device has VLAN set up");
1174		netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1175			   portname);
1176		return -EPERM;
1177	}
1178
1179	err = team_dev_type_check_change(dev, port_dev);
1180	if (err)
1181		return err;
1182
1183	if (port_dev->flags & IFF_UP) {
1184		NL_SET_ERR_MSG(extack, "Device is up. Set it down before adding it as a team port");
1185		netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1186			   portname);
1187		return -EBUSY;
1188	}
1189
1190	port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1191		       GFP_KERNEL);
1192	if (!port)
1193		return -ENOMEM;
1194
1195	port->dev = port_dev;
1196	port->team = team;
1197	INIT_LIST_HEAD(&port->qom_list);
1198
1199	port->orig.mtu = port_dev->mtu;
1200	err = dev_set_mtu(port_dev, dev->mtu);
1201	if (err) {
1202		netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1203		goto err_set_mtu;
1204	}
1205
1206	memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1207
1208	err = team_port_enter(team, port);
1209	if (err) {
1210		netdev_err(dev, "Device %s failed to enter team mode\n",
1211			   portname);
1212		goto err_port_enter;
1213	}
1214
1215	err = dev_open(port_dev);
1216	if (err) {
1217		netdev_dbg(dev, "Device %s opening failed\n",
1218			   portname);
1219		goto err_dev_open;
1220	}
1221
1222	err = vlan_vids_add_by_dev(port_dev, dev);
1223	if (err) {
1224		netdev_err(dev, "Failed to add vlan ids to device %s\n",
1225				portname);
1226		goto err_vids_add;
1227	}
1228
1229	err = team_port_enable_netpoll(port);
1230	if (err) {
1231		netdev_err(dev, "Failed to enable netpoll on device %s\n",
1232			   portname);
1233		goto err_enable_netpoll;
1234	}
1235
1236	if (!(dev->features & NETIF_F_LRO))
1237		dev_disable_lro(port_dev);
1238
1239	err = netdev_rx_handler_register(port_dev, team_handle_frame,
1240					 port);
1241	if (err) {
1242		netdev_err(dev, "Device %s failed to register rx_handler\n",
1243			   portname);
1244		goto err_handler_register;
1245	}
1246
1247	err = team_upper_dev_link(team, port, extack);
1248	if (err) {
1249		netdev_err(dev, "Device %s failed to set upper link\n",
1250			   portname);
1251		goto err_set_upper_link;
1252	}
1253
1254	err = __team_option_inst_add_port(team, port);
1255	if (err) {
1256		netdev_err(dev, "Device %s failed to add per-port options\n",
1257			   portname);
1258		goto err_option_port_add;
1259	}
1260
1261	netif_addr_lock_bh(dev);
1262	dev_uc_sync_multiple(port_dev, dev);
1263	dev_mc_sync_multiple(port_dev, dev);
1264	netif_addr_unlock_bh(dev);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1265
1266	port->index = -1;
1267	list_add_tail_rcu(&port->list, &team->port_list);
1268	team_port_enable(team, port);
1269	__team_compute_features(team);
1270	__team_port_change_port_added(port, !!netif_carrier_ok(port_dev));
1271	__team_options_change_check(team);
1272
1273	netdev_info(dev, "Port device %s added\n", portname);
1274
1275	return 0;
1276
 
 
 
1277err_option_port_add:
1278	team_upper_dev_unlink(team, port);
1279
1280err_set_upper_link:
1281	netdev_rx_handler_unregister(port_dev);
1282
1283err_handler_register:
1284	team_port_disable_netpoll(port);
1285
1286err_enable_netpoll:
1287	vlan_vids_del_by_dev(port_dev, dev);
1288
1289err_vids_add:
1290	dev_close(port_dev);
1291
1292err_dev_open:
1293	team_port_leave(team, port);
1294	team_port_set_orig_dev_addr(port);
1295
1296err_port_enter:
1297	dev_set_mtu(port_dev, port->orig.mtu);
1298
1299err_set_mtu:
1300	kfree(port);
1301
1302	return err;
1303}
1304
1305static void __team_port_change_port_removed(struct team_port *port);
1306
1307static int team_port_del(struct team *team, struct net_device *port_dev)
1308{
1309	struct net_device *dev = team->dev;
1310	struct team_port *port;
1311	char *portname = port_dev->name;
1312
1313	port = team_port_get_rtnl(port_dev);
1314	if (!port || !team_port_find(team, port)) {
1315		netdev_err(dev, "Device %s does not act as a port of this team\n",
1316			   portname);
1317		return -ENOENT;
1318	}
1319
1320	team_port_disable(team, port);
1321	list_del_rcu(&port->list);
 
 
 
 
 
 
1322	team_upper_dev_unlink(team, port);
1323	netdev_rx_handler_unregister(port_dev);
1324	team_port_disable_netpoll(port);
1325	vlan_vids_del_by_dev(port_dev, dev);
1326	dev_uc_unsync(port_dev, dev);
1327	dev_mc_unsync(port_dev, dev);
 
 
1328	dev_close(port_dev);
1329	team_port_leave(team, port);
1330
1331	__team_option_inst_mark_removed_port(team, port);
1332	__team_options_change_check(team);
1333	__team_option_inst_del_port(team, port);
1334	__team_port_change_port_removed(port);
1335
1336	team_port_set_orig_dev_addr(port);
1337	dev_set_mtu(port_dev, port->orig.mtu);
1338	kfree_rcu(port, rcu);
1339	netdev_info(dev, "Port device %s removed\n", portname);
1340	__team_compute_features(team);
1341
1342	return 0;
1343}
1344
1345
1346/*****************
1347 * Net device ops
1348 *****************/
1349
1350static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1351{
1352	ctx->data.str_val = team->mode->kind;
1353	return 0;
1354}
1355
1356static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1357{
1358	return team_change_mode(team, ctx->data.str_val);
1359}
1360
1361static int team_notify_peers_count_get(struct team *team,
1362				       struct team_gsetter_ctx *ctx)
1363{
1364	ctx->data.u32_val = team->notify_peers.count;
1365	return 0;
1366}
1367
1368static int team_notify_peers_count_set(struct team *team,
1369				       struct team_gsetter_ctx *ctx)
1370{
1371	team->notify_peers.count = ctx->data.u32_val;
1372	return 0;
1373}
1374
1375static int team_notify_peers_interval_get(struct team *team,
1376					  struct team_gsetter_ctx *ctx)
1377{
1378	ctx->data.u32_val = team->notify_peers.interval;
1379	return 0;
1380}
1381
1382static int team_notify_peers_interval_set(struct team *team,
1383					  struct team_gsetter_ctx *ctx)
1384{
1385	team->notify_peers.interval = ctx->data.u32_val;
1386	return 0;
1387}
1388
1389static int team_mcast_rejoin_count_get(struct team *team,
1390				       struct team_gsetter_ctx *ctx)
1391{
1392	ctx->data.u32_val = team->mcast_rejoin.count;
1393	return 0;
1394}
1395
1396static int team_mcast_rejoin_count_set(struct team *team,
1397				       struct team_gsetter_ctx *ctx)
1398{
1399	team->mcast_rejoin.count = ctx->data.u32_val;
1400	return 0;
1401}
1402
1403static int team_mcast_rejoin_interval_get(struct team *team,
1404					  struct team_gsetter_ctx *ctx)
1405{
1406	ctx->data.u32_val = team->mcast_rejoin.interval;
1407	return 0;
1408}
1409
1410static int team_mcast_rejoin_interval_set(struct team *team,
1411					  struct team_gsetter_ctx *ctx)
1412{
1413	team->mcast_rejoin.interval = ctx->data.u32_val;
1414	return 0;
1415}
1416
1417static int team_port_en_option_get(struct team *team,
1418				   struct team_gsetter_ctx *ctx)
1419{
1420	struct team_port *port = ctx->info->port;
1421
1422	ctx->data.bool_val = team_port_enabled(port);
1423	return 0;
1424}
1425
1426static int team_port_en_option_set(struct team *team,
1427				   struct team_gsetter_ctx *ctx)
1428{
1429	struct team_port *port = ctx->info->port;
1430
1431	if (ctx->data.bool_val)
1432		team_port_enable(team, port);
1433	else
1434		team_port_disable(team, port);
1435	return 0;
1436}
1437
1438static int team_user_linkup_option_get(struct team *team,
1439				       struct team_gsetter_ctx *ctx)
1440{
1441	struct team_port *port = ctx->info->port;
1442
1443	ctx->data.bool_val = port->user.linkup;
1444	return 0;
1445}
1446
1447static void __team_carrier_check(struct team *team);
1448
1449static int team_user_linkup_option_set(struct team *team,
1450				       struct team_gsetter_ctx *ctx)
1451{
1452	struct team_port *port = ctx->info->port;
1453
1454	port->user.linkup = ctx->data.bool_val;
1455	team_refresh_port_linkup(port);
1456	__team_carrier_check(port->team);
1457	return 0;
1458}
1459
1460static int team_user_linkup_en_option_get(struct team *team,
1461					  struct team_gsetter_ctx *ctx)
1462{
1463	struct team_port *port = ctx->info->port;
1464
1465	ctx->data.bool_val = port->user.linkup_enabled;
1466	return 0;
1467}
1468
1469static int team_user_linkup_en_option_set(struct team *team,
1470					  struct team_gsetter_ctx *ctx)
1471{
1472	struct team_port *port = ctx->info->port;
1473
1474	port->user.linkup_enabled = ctx->data.bool_val;
1475	team_refresh_port_linkup(port);
1476	__team_carrier_check(port->team);
1477	return 0;
1478}
1479
1480static int team_priority_option_get(struct team *team,
1481				    struct team_gsetter_ctx *ctx)
1482{
1483	struct team_port *port = ctx->info->port;
1484
1485	ctx->data.s32_val = port->priority;
1486	return 0;
1487}
1488
1489static int team_priority_option_set(struct team *team,
1490				    struct team_gsetter_ctx *ctx)
1491{
1492	struct team_port *port = ctx->info->port;
1493	s32 priority = ctx->data.s32_val;
1494
1495	if (port->priority == priority)
1496		return 0;
1497	port->priority = priority;
1498	team_queue_override_port_prio_changed(team, port);
1499	return 0;
1500}
1501
1502static int team_queue_id_option_get(struct team *team,
1503				    struct team_gsetter_ctx *ctx)
1504{
1505	struct team_port *port = ctx->info->port;
1506
1507	ctx->data.u32_val = port->queue_id;
1508	return 0;
1509}
1510
1511static int team_queue_id_option_set(struct team *team,
1512				    struct team_gsetter_ctx *ctx)
1513{
1514	struct team_port *port = ctx->info->port;
1515	u16 new_queue_id = ctx->data.u32_val;
1516
1517	if (port->queue_id == new_queue_id)
1518		return 0;
1519	if (new_queue_id >= team->dev->real_num_tx_queues)
1520		return -EINVAL;
1521	team_queue_override_port_change_queue_id(team, port, new_queue_id);
1522	return 0;
1523}
1524
1525static const struct team_option team_options[] = {
1526	{
1527		.name = "mode",
1528		.type = TEAM_OPTION_TYPE_STRING,
1529		.getter = team_mode_option_get,
1530		.setter = team_mode_option_set,
1531	},
1532	{
1533		.name = "notify_peers_count",
1534		.type = TEAM_OPTION_TYPE_U32,
1535		.getter = team_notify_peers_count_get,
1536		.setter = team_notify_peers_count_set,
1537	},
1538	{
1539		.name = "notify_peers_interval",
1540		.type = TEAM_OPTION_TYPE_U32,
1541		.getter = team_notify_peers_interval_get,
1542		.setter = team_notify_peers_interval_set,
1543	},
1544	{
1545		.name = "mcast_rejoin_count",
1546		.type = TEAM_OPTION_TYPE_U32,
1547		.getter = team_mcast_rejoin_count_get,
1548		.setter = team_mcast_rejoin_count_set,
1549	},
1550	{
1551		.name = "mcast_rejoin_interval",
1552		.type = TEAM_OPTION_TYPE_U32,
1553		.getter = team_mcast_rejoin_interval_get,
1554		.setter = team_mcast_rejoin_interval_set,
1555	},
1556	{
1557		.name = "enabled",
1558		.type = TEAM_OPTION_TYPE_BOOL,
1559		.per_port = true,
1560		.getter = team_port_en_option_get,
1561		.setter = team_port_en_option_set,
1562	},
1563	{
1564		.name = "user_linkup",
1565		.type = TEAM_OPTION_TYPE_BOOL,
1566		.per_port = true,
1567		.getter = team_user_linkup_option_get,
1568		.setter = team_user_linkup_option_set,
1569	},
1570	{
1571		.name = "user_linkup_enabled",
1572		.type = TEAM_OPTION_TYPE_BOOL,
1573		.per_port = true,
1574		.getter = team_user_linkup_en_option_get,
1575		.setter = team_user_linkup_en_option_set,
1576	},
1577	{
1578		.name = "priority",
1579		.type = TEAM_OPTION_TYPE_S32,
1580		.per_port = true,
1581		.getter = team_priority_option_get,
1582		.setter = team_priority_option_set,
1583	},
1584	{
1585		.name = "queue_id",
1586		.type = TEAM_OPTION_TYPE_U32,
1587		.per_port = true,
1588		.getter = team_queue_id_option_get,
1589		.setter = team_queue_id_option_set,
1590	},
1591};
1592
1593
1594static int team_init(struct net_device *dev)
1595{
1596	struct team *team = netdev_priv(dev);
1597	int i;
1598	int err;
1599
1600	team->dev = dev;
1601	mutex_init(&team->lock);
1602	team_set_no_mode(team);
 
1603
1604	team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1605	if (!team->pcpu_stats)
1606		return -ENOMEM;
1607
1608	for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1609		INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1610	INIT_LIST_HEAD(&team->port_list);
1611	err = team_queue_override_init(team);
1612	if (err)
1613		goto err_team_queue_override_init;
1614
1615	team_adjust_ops(team);
1616
1617	INIT_LIST_HEAD(&team->option_list);
1618	INIT_LIST_HEAD(&team->option_inst_list);
1619
1620	team_notify_peers_init(team);
1621	team_mcast_rejoin_init(team);
1622
1623	err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1624	if (err)
1625		goto err_options_register;
1626	netif_carrier_off(dev);
1627
 
 
1628	netdev_lockdep_set_classes(dev);
1629
1630	return 0;
1631
1632err_options_register:
1633	team_mcast_rejoin_fini(team);
1634	team_notify_peers_fini(team);
1635	team_queue_override_fini(team);
1636err_team_queue_override_init:
1637	free_percpu(team->pcpu_stats);
1638
1639	return err;
1640}
1641
1642static void team_uninit(struct net_device *dev)
1643{
1644	struct team *team = netdev_priv(dev);
1645	struct team_port *port;
1646	struct team_port *tmp;
1647
1648	mutex_lock(&team->lock);
1649	list_for_each_entry_safe(port, tmp, &team->port_list, list)
1650		team_port_del(team, port->dev);
1651
1652	__team_change_mode(team, NULL); /* cleanup */
1653	__team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1654	team_mcast_rejoin_fini(team);
1655	team_notify_peers_fini(team);
1656	team_queue_override_fini(team);
1657	mutex_unlock(&team->lock);
1658	netdev_change_features(dev);
 
1659}
1660
1661static void team_destructor(struct net_device *dev)
1662{
1663	struct team *team = netdev_priv(dev);
1664
1665	free_percpu(team->pcpu_stats);
1666}
1667
1668static int team_open(struct net_device *dev)
1669{
1670	return 0;
1671}
1672
1673static int team_close(struct net_device *dev)
1674{
 
 
 
 
 
 
 
 
1675	return 0;
1676}
1677
1678/*
1679 * note: already called with rcu_read_lock
1680 */
1681static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1682{
1683	struct team *team = netdev_priv(dev);
1684	bool tx_success;
1685	unsigned int len = skb->len;
1686
1687	tx_success = team_queue_override_transmit(team, skb);
1688	if (!tx_success)
1689		tx_success = team->ops.transmit(team, skb);
1690	if (tx_success) {
1691		struct team_pcpu_stats *pcpu_stats;
1692
1693		pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1694		u64_stats_update_begin(&pcpu_stats->syncp);
1695		pcpu_stats->tx_packets++;
1696		pcpu_stats->tx_bytes += len;
1697		u64_stats_update_end(&pcpu_stats->syncp);
1698	} else {
1699		this_cpu_inc(team->pcpu_stats->tx_dropped);
1700	}
1701
1702	return NETDEV_TX_OK;
1703}
1704
1705static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1706			     void *accel_priv, select_queue_fallback_t fallback)
1707{
1708	/*
1709	 * This helper function exists to help dev_pick_tx get the correct
1710	 * destination queue.  Using a helper function skips a call to
1711	 * skb_tx_hash and will put the skbs in the queue we expect on their
1712	 * way down to the team driver.
1713	 */
1714	u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1715
1716	/*
1717	 * Save the original txq to restore before passing to the driver
1718	 */
1719	qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1720
1721	if (unlikely(txq >= dev->real_num_tx_queues)) {
1722		do {
1723			txq -= dev->real_num_tx_queues;
1724		} while (txq >= dev->real_num_tx_queues);
1725	}
1726	return txq;
1727}
1728
1729static void team_change_rx_flags(struct net_device *dev, int change)
1730{
1731	struct team *team = netdev_priv(dev);
1732	struct team_port *port;
1733	int inc;
1734
1735	rcu_read_lock();
1736	list_for_each_entry_rcu(port, &team->port_list, list) {
1737		if (change & IFF_PROMISC) {
1738			inc = dev->flags & IFF_PROMISC ? 1 : -1;
1739			dev_set_promiscuity(port->dev, inc);
1740		}
1741		if (change & IFF_ALLMULTI) {
1742			inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1743			dev_set_allmulti(port->dev, inc);
1744		}
1745	}
1746	rcu_read_unlock();
1747}
1748
1749static void team_set_rx_mode(struct net_device *dev)
1750{
1751	struct team *team = netdev_priv(dev);
1752	struct team_port *port;
1753
1754	rcu_read_lock();
1755	list_for_each_entry_rcu(port, &team->port_list, list) {
1756		dev_uc_sync_multiple(port->dev, dev);
1757		dev_mc_sync_multiple(port->dev, dev);
1758	}
1759	rcu_read_unlock();
1760}
1761
1762static int team_set_mac_address(struct net_device *dev, void *p)
1763{
1764	struct sockaddr *addr = p;
1765	struct team *team = netdev_priv(dev);
1766	struct team_port *port;
1767
1768	if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1769		return -EADDRNOTAVAIL;
1770	memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1771	mutex_lock(&team->lock);
1772	list_for_each_entry(port, &team->port_list, list)
1773		if (team->ops.port_change_dev_addr)
1774			team->ops.port_change_dev_addr(team, port);
1775	mutex_unlock(&team->lock);
1776	return 0;
1777}
1778
1779static int team_change_mtu(struct net_device *dev, int new_mtu)
1780{
1781	struct team *team = netdev_priv(dev);
1782	struct team_port *port;
1783	int err;
1784
1785	/*
1786	 * Alhough this is reader, it's guarded by team lock. It's not possible
1787	 * to traverse list in reverse under rcu_read_lock
1788	 */
1789	mutex_lock(&team->lock);
1790	team->port_mtu_change_allowed = true;
1791	list_for_each_entry(port, &team->port_list, list) {
1792		err = dev_set_mtu(port->dev, new_mtu);
1793		if (err) {
1794			netdev_err(dev, "Device %s failed to change mtu",
1795				   port->dev->name);
1796			goto unwind;
1797		}
1798	}
1799	team->port_mtu_change_allowed = false;
1800	mutex_unlock(&team->lock);
1801
1802	dev->mtu = new_mtu;
1803
1804	return 0;
1805
1806unwind:
1807	list_for_each_entry_continue_reverse(port, &team->port_list, list)
1808		dev_set_mtu(port->dev, dev->mtu);
1809	team->port_mtu_change_allowed = false;
1810	mutex_unlock(&team->lock);
1811
1812	return err;
1813}
1814
1815static void
1816team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1817{
1818	struct team *team = netdev_priv(dev);
1819	struct team_pcpu_stats *p;
1820	u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1821	u32 rx_dropped = 0, tx_dropped = 0, rx_nohandler = 0;
1822	unsigned int start;
1823	int i;
1824
1825	for_each_possible_cpu(i) {
1826		p = per_cpu_ptr(team->pcpu_stats, i);
1827		do {
1828			start = u64_stats_fetch_begin_irq(&p->syncp);
1829			rx_packets	= p->rx_packets;
1830			rx_bytes	= p->rx_bytes;
1831			rx_multicast	= p->rx_multicast;
1832			tx_packets	= p->tx_packets;
1833			tx_bytes	= p->tx_bytes;
1834		} while (u64_stats_fetch_retry_irq(&p->syncp, start));
1835
1836		stats->rx_packets	+= rx_packets;
1837		stats->rx_bytes		+= rx_bytes;
1838		stats->multicast	+= rx_multicast;
1839		stats->tx_packets	+= tx_packets;
1840		stats->tx_bytes		+= tx_bytes;
1841		/*
1842		 * rx_dropped, tx_dropped & rx_nohandler are u32,
1843		 * updated without syncp protection.
1844		 */
1845		rx_dropped	+= p->rx_dropped;
1846		tx_dropped	+= p->tx_dropped;
1847		rx_nohandler	+= p->rx_nohandler;
1848	}
1849	stats->rx_dropped	= rx_dropped;
1850	stats->tx_dropped	= tx_dropped;
1851	stats->rx_nohandler	= rx_nohandler;
1852}
1853
1854static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1855{
1856	struct team *team = netdev_priv(dev);
1857	struct team_port *port;
1858	int err;
1859
1860	/*
1861	 * Alhough this is reader, it's guarded by team lock. It's not possible
1862	 * to traverse list in reverse under rcu_read_lock
1863	 */
1864	mutex_lock(&team->lock);
1865	list_for_each_entry(port, &team->port_list, list) {
1866		err = vlan_vid_add(port->dev, proto, vid);
1867		if (err)
1868			goto unwind;
1869	}
1870	mutex_unlock(&team->lock);
1871
1872	return 0;
1873
1874unwind:
1875	list_for_each_entry_continue_reverse(port, &team->port_list, list)
1876		vlan_vid_del(port->dev, proto, vid);
1877	mutex_unlock(&team->lock);
1878
1879	return err;
1880}
1881
1882static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1883{
1884	struct team *team = netdev_priv(dev);
1885	struct team_port *port;
1886
1887	mutex_lock(&team->lock);
1888	list_for_each_entry(port, &team->port_list, list)
1889		vlan_vid_del(port->dev, proto, vid);
1890	mutex_unlock(&team->lock);
1891
1892	return 0;
1893}
1894
1895#ifdef CONFIG_NET_POLL_CONTROLLER
1896static void team_poll_controller(struct net_device *dev)
1897{
1898}
1899
1900static void __team_netpoll_cleanup(struct team *team)
1901{
1902	struct team_port *port;
1903
1904	list_for_each_entry(port, &team->port_list, list)
1905		team_port_disable_netpoll(port);
1906}
1907
1908static void team_netpoll_cleanup(struct net_device *dev)
1909{
1910	struct team *team = netdev_priv(dev);
1911
1912	mutex_lock(&team->lock);
1913	__team_netpoll_cleanup(team);
1914	mutex_unlock(&team->lock);
1915}
1916
1917static int team_netpoll_setup(struct net_device *dev,
1918			      struct netpoll_info *npifo)
1919{
1920	struct team *team = netdev_priv(dev);
1921	struct team_port *port;
1922	int err = 0;
1923
1924	mutex_lock(&team->lock);
1925	list_for_each_entry(port, &team->port_list, list) {
1926		err = __team_port_enable_netpoll(port);
1927		if (err) {
1928			__team_netpoll_cleanup(team);
1929			break;
1930		}
1931	}
1932	mutex_unlock(&team->lock);
1933	return err;
1934}
1935#endif
1936
1937static int team_add_slave(struct net_device *dev, struct net_device *port_dev,
1938			  struct netlink_ext_ack *extack)
1939{
1940	struct team *team = netdev_priv(dev);
1941	int err;
1942
1943	mutex_lock(&team->lock);
1944	err = team_port_add(team, port_dev, extack);
1945	mutex_unlock(&team->lock);
1946
1947	if (!err)
1948		netdev_change_features(dev);
1949
1950	return err;
1951}
1952
1953static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1954{
1955	struct team *team = netdev_priv(dev);
1956	int err;
1957
1958	mutex_lock(&team->lock);
1959	err = team_port_del(team, port_dev);
1960	mutex_unlock(&team->lock);
1961
1962	if (!err)
1963		netdev_change_features(dev);
 
 
 
 
 
 
 
1964
1965	return err;
1966}
1967
1968static netdev_features_t team_fix_features(struct net_device *dev,
1969					   netdev_features_t features)
1970{
1971	struct team_port *port;
1972	struct team *team = netdev_priv(dev);
1973	netdev_features_t mask;
1974
1975	mask = features;
1976	features &= ~NETIF_F_ONE_FOR_ALL;
1977	features |= NETIF_F_ALL_FOR_ALL;
1978
1979	rcu_read_lock();
1980	list_for_each_entry_rcu(port, &team->port_list, list) {
1981		features = netdev_increment_features(features,
1982						     port->dev->features,
1983						     mask);
1984	}
1985	rcu_read_unlock();
1986
1987	features = netdev_add_tso_features(features, mask);
1988
1989	return features;
1990}
1991
1992static int team_change_carrier(struct net_device *dev, bool new_carrier)
1993{
1994	struct team *team = netdev_priv(dev);
1995
1996	team->user_carrier_enabled = true;
1997
1998	if (new_carrier)
1999		netif_carrier_on(dev);
2000	else
2001		netif_carrier_off(dev);
2002	return 0;
2003}
2004
2005static const struct net_device_ops team_netdev_ops = {
2006	.ndo_init		= team_init,
2007	.ndo_uninit		= team_uninit,
2008	.ndo_open		= team_open,
2009	.ndo_stop		= team_close,
2010	.ndo_start_xmit		= team_xmit,
2011	.ndo_select_queue	= team_select_queue,
2012	.ndo_change_rx_flags	= team_change_rx_flags,
2013	.ndo_set_rx_mode	= team_set_rx_mode,
2014	.ndo_set_mac_address	= team_set_mac_address,
2015	.ndo_change_mtu		= team_change_mtu,
2016	.ndo_get_stats64	= team_get_stats64,
2017	.ndo_vlan_rx_add_vid	= team_vlan_rx_add_vid,
2018	.ndo_vlan_rx_kill_vid	= team_vlan_rx_kill_vid,
2019#ifdef CONFIG_NET_POLL_CONTROLLER
2020	.ndo_poll_controller	= team_poll_controller,
2021	.ndo_netpoll_setup	= team_netpoll_setup,
2022	.ndo_netpoll_cleanup	= team_netpoll_cleanup,
2023#endif
2024	.ndo_add_slave		= team_add_slave,
2025	.ndo_del_slave		= team_del_slave,
2026	.ndo_fix_features	= team_fix_features,
2027	.ndo_change_carrier     = team_change_carrier,
2028	.ndo_features_check	= passthru_features_check,
2029};
2030
2031/***********************
2032 * ethtool interface
2033 ***********************/
2034
2035static void team_ethtool_get_drvinfo(struct net_device *dev,
2036				     struct ethtool_drvinfo *drvinfo)
2037{
2038	strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
2039	strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2040}
2041
2042static const struct ethtool_ops team_ethtool_ops = {
2043	.get_drvinfo		= team_ethtool_get_drvinfo,
2044	.get_link		= ethtool_op_get_link,
 
2045};
2046
2047/***********************
2048 * rt netlink interface
2049 ***********************/
2050
2051static void team_setup_by_port(struct net_device *dev,
2052			       struct net_device *port_dev)
2053{
2054	dev->header_ops	= port_dev->header_ops;
 
 
 
 
 
2055	dev->type = port_dev->type;
2056	dev->hard_header_len = port_dev->hard_header_len;
 
2057	dev->addr_len = port_dev->addr_len;
2058	dev->mtu = port_dev->mtu;
2059	memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2060	eth_hw_addr_inherit(dev, port_dev);
 
 
 
 
 
 
 
 
 
2061}
2062
2063static int team_dev_type_check_change(struct net_device *dev,
2064				      struct net_device *port_dev)
2065{
2066	struct team *team = netdev_priv(dev);
2067	char *portname = port_dev->name;
2068	int err;
2069
2070	if (dev->type == port_dev->type)
2071		return 0;
2072	if (!list_empty(&team->port_list)) {
2073		netdev_err(dev, "Device %s is of different type\n", portname);
2074		return -EBUSY;
2075	}
2076	err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2077	err = notifier_to_errno(err);
2078	if (err) {
2079		netdev_err(dev, "Refused to change device type\n");
2080		return err;
2081	}
2082	dev_uc_flush(dev);
2083	dev_mc_flush(dev);
2084	team_setup_by_port(dev, port_dev);
2085	call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2086	return 0;
2087}
2088
2089static void team_setup(struct net_device *dev)
2090{
 
 
2091	ether_setup(dev);
2092	dev->max_mtu = ETH_MAX_MTU;
 
2093
2094	dev->netdev_ops = &team_netdev_ops;
2095	dev->ethtool_ops = &team_ethtool_ops;
2096	dev->needs_free_netdev = true;
2097	dev->priv_destructor = team_destructor;
2098	dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2099	dev->priv_flags |= IFF_NO_QUEUE;
2100	dev->priv_flags |= IFF_TEAM;
2101
2102	/*
2103	 * Indicate we support unicast address filtering. That way core won't
2104	 * bring us to promisc mode in case a unicast addr is added.
2105	 * Let this up to underlay drivers.
2106	 */
2107	dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2108
2109	dev->features |= NETIF_F_LLTX;
2110	dev->features |= NETIF_F_GRO;
2111
2112	/* Don't allow team devices to change network namespaces. */
2113	dev->features |= NETIF_F_NETNS_LOCAL;
2114
2115	dev->hw_features = TEAM_VLAN_FEATURES |
2116			   NETIF_F_HW_VLAN_CTAG_TX |
2117			   NETIF_F_HW_VLAN_CTAG_RX |
2118			   NETIF_F_HW_VLAN_CTAG_FILTER;
 
 
2119
2120	dev->hw_features |= NETIF_F_GSO_ENCAP_ALL;
2121	dev->features |= dev->hw_features;
 
2122}
2123
2124static int team_newlink(struct net *src_net, struct net_device *dev,
2125			struct nlattr *tb[], struct nlattr *data[],
2126			struct netlink_ext_ack *extack)
2127{
2128	if (tb[IFLA_ADDRESS] == NULL)
2129		eth_hw_addr_random(dev);
2130
2131	return register_netdevice(dev);
2132}
2133
2134static int team_validate(struct nlattr *tb[], struct nlattr *data[],
2135			 struct netlink_ext_ack *extack)
2136{
2137	if (tb[IFLA_ADDRESS]) {
2138		if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2139			return -EINVAL;
2140		if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2141			return -EADDRNOTAVAIL;
2142	}
2143	return 0;
2144}
2145
2146static unsigned int team_get_num_tx_queues(void)
2147{
2148	return TEAM_DEFAULT_NUM_TX_QUEUES;
2149}
2150
2151static unsigned int team_get_num_rx_queues(void)
2152{
2153	return TEAM_DEFAULT_NUM_RX_QUEUES;
2154}
2155
2156static struct rtnl_link_ops team_link_ops __read_mostly = {
2157	.kind			= DRV_NAME,
2158	.priv_size		= sizeof(struct team),
2159	.setup			= team_setup,
2160	.newlink		= team_newlink,
2161	.validate		= team_validate,
2162	.get_num_tx_queues	= team_get_num_tx_queues,
2163	.get_num_rx_queues	= team_get_num_rx_queues,
2164};
2165
2166
2167/***********************************
2168 * Generic netlink custom interface
2169 ***********************************/
2170
2171static struct genl_family team_nl_family;
2172
2173static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2174	[TEAM_ATTR_UNSPEC]			= { .type = NLA_UNSPEC, },
2175	[TEAM_ATTR_TEAM_IFINDEX]		= { .type = NLA_U32 },
2176	[TEAM_ATTR_LIST_OPTION]			= { .type = NLA_NESTED },
2177	[TEAM_ATTR_LIST_PORT]			= { .type = NLA_NESTED },
2178};
2179
2180static const struct nla_policy
2181team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2182	[TEAM_ATTR_OPTION_UNSPEC]		= { .type = NLA_UNSPEC, },
2183	[TEAM_ATTR_OPTION_NAME] = {
2184		.type = NLA_STRING,
2185		.len = TEAM_STRING_MAX_LEN,
2186	},
2187	[TEAM_ATTR_OPTION_CHANGED]		= { .type = NLA_FLAG },
2188	[TEAM_ATTR_OPTION_TYPE]			= { .type = NLA_U8 },
2189	[TEAM_ATTR_OPTION_DATA]			= { .type = NLA_BINARY },
 
 
2190};
2191
2192static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2193{
2194	struct sk_buff *msg;
2195	void *hdr;
2196	int err;
2197
2198	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2199	if (!msg)
2200		return -ENOMEM;
2201
2202	hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2203			  &team_nl_family, 0, TEAM_CMD_NOOP);
2204	if (!hdr) {
2205		err = -EMSGSIZE;
2206		goto err_msg_put;
2207	}
2208
2209	genlmsg_end(msg, hdr);
2210
2211	return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2212
2213err_msg_put:
2214	nlmsg_free(msg);
2215
2216	return err;
2217}
2218
2219/*
2220 * Netlink cmd functions should be locked by following two functions.
2221 * Since dev gets held here, that ensures dev won't disappear in between.
2222 */
2223static struct team *team_nl_team_get(struct genl_info *info)
2224{
2225	struct net *net = genl_info_net(info);
2226	int ifindex;
2227	struct net_device *dev;
2228	struct team *team;
2229
2230	if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2231		return NULL;
2232
2233	ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2234	dev = dev_get_by_index(net, ifindex);
2235	if (!dev || dev->netdev_ops != &team_netdev_ops) {
2236		if (dev)
2237			dev_put(dev);
2238		return NULL;
2239	}
2240
2241	team = netdev_priv(dev);
2242	mutex_lock(&team->lock);
2243	return team;
2244}
2245
2246static void team_nl_team_put(struct team *team)
2247{
2248	mutex_unlock(&team->lock);
2249	dev_put(team->dev);
2250}
2251
2252typedef int team_nl_send_func_t(struct sk_buff *skb,
2253				struct team *team, u32 portid);
2254
2255static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2256{
2257	return genlmsg_unicast(dev_net(team->dev), skb, portid);
2258}
2259
2260static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2261				       struct team_option_inst *opt_inst)
2262{
2263	struct nlattr *option_item;
2264	struct team_option *option = opt_inst->option;
2265	struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2266	struct team_gsetter_ctx ctx;
2267	int err;
2268
2269	ctx.info = opt_inst_info;
2270	err = team_option_get(team, opt_inst, &ctx);
2271	if (err)
2272		return err;
2273
2274	option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
2275	if (!option_item)
2276		return -EMSGSIZE;
2277
2278	if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2279		goto nest_cancel;
2280	if (opt_inst_info->port &&
2281	    nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2282			opt_inst_info->port->dev->ifindex))
2283		goto nest_cancel;
2284	if (opt_inst->option->array_size &&
2285	    nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2286			opt_inst_info->array_index))
2287		goto nest_cancel;
2288
2289	switch (option->type) {
2290	case TEAM_OPTION_TYPE_U32:
2291		if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2292			goto nest_cancel;
2293		if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2294			goto nest_cancel;
2295		break;
2296	case TEAM_OPTION_TYPE_STRING:
2297		if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2298			goto nest_cancel;
2299		if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2300				   ctx.data.str_val))
2301			goto nest_cancel;
2302		break;
2303	case TEAM_OPTION_TYPE_BINARY:
2304		if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2305			goto nest_cancel;
2306		if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2307			    ctx.data.bin_val.ptr))
2308			goto nest_cancel;
2309		break;
2310	case TEAM_OPTION_TYPE_BOOL:
2311		if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2312			goto nest_cancel;
2313		if (ctx.data.bool_val &&
2314		    nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2315			goto nest_cancel;
2316		break;
2317	case TEAM_OPTION_TYPE_S32:
2318		if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2319			goto nest_cancel;
2320		if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2321			goto nest_cancel;
2322		break;
2323	default:
2324		BUG();
2325	}
2326	if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2327		goto nest_cancel;
2328	if (opt_inst->changed) {
2329		if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2330			goto nest_cancel;
2331		opt_inst->changed = false;
2332	}
2333	nla_nest_end(skb, option_item);
2334	return 0;
2335
2336nest_cancel:
2337	nla_nest_cancel(skb, option_item);
2338	return -EMSGSIZE;
2339}
2340
2341static int __send_and_alloc_skb(struct sk_buff **pskb,
2342				struct team *team, u32 portid,
2343				team_nl_send_func_t *send_func)
2344{
2345	int err;
2346
2347	if (*pskb) {
2348		err = send_func(*pskb, team, portid);
2349		if (err)
2350			return err;
2351	}
2352	*pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2353	if (!*pskb)
2354		return -ENOMEM;
2355	return 0;
2356}
2357
2358static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2359				    int flags, team_nl_send_func_t *send_func,
2360				    struct list_head *sel_opt_inst_list)
2361{
2362	struct nlattr *option_list;
2363	struct nlmsghdr *nlh;
2364	void *hdr;
2365	struct team_option_inst *opt_inst;
2366	int err;
2367	struct sk_buff *skb = NULL;
2368	bool incomplete;
2369	int i;
2370
2371	opt_inst = list_first_entry(sel_opt_inst_list,
2372				    struct team_option_inst, tmp_list);
2373
2374start_again:
2375	err = __send_and_alloc_skb(&skb, team, portid, send_func);
2376	if (err)
2377		return err;
2378
2379	hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2380			  TEAM_CMD_OPTIONS_GET);
2381	if (!hdr) {
2382		nlmsg_free(skb);
2383		return -EMSGSIZE;
2384	}
2385
2386	if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2387		goto nla_put_failure;
2388	option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2389	if (!option_list)
2390		goto nla_put_failure;
2391
2392	i = 0;
2393	incomplete = false;
2394	list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2395		err = team_nl_fill_one_option_get(skb, team, opt_inst);
2396		if (err) {
2397			if (err == -EMSGSIZE) {
2398				if (!i)
2399					goto errout;
2400				incomplete = true;
2401				break;
2402			}
2403			goto errout;
2404		}
2405		i++;
2406	}
2407
2408	nla_nest_end(skb, option_list);
2409	genlmsg_end(skb, hdr);
2410	if (incomplete)
2411		goto start_again;
2412
2413send_done:
2414	nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2415	if (!nlh) {
2416		err = __send_and_alloc_skb(&skb, team, portid, send_func);
2417		if (err)
2418			return err;
2419		goto send_done;
2420	}
2421
2422	return send_func(skb, team, portid);
2423
2424nla_put_failure:
2425	err = -EMSGSIZE;
2426errout:
2427	genlmsg_cancel(skb, hdr);
2428	nlmsg_free(skb);
2429	return err;
2430}
2431
2432static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2433{
2434	struct team *team;
2435	struct team_option_inst *opt_inst;
2436	int err;
2437	LIST_HEAD(sel_opt_inst_list);
2438
2439	team = team_nl_team_get(info);
2440	if (!team)
2441		return -EINVAL;
2442
2443	list_for_each_entry(opt_inst, &team->option_inst_list, list)
2444		list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2445	err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2446				       NLM_F_ACK, team_nl_send_unicast,
2447				       &sel_opt_inst_list);
2448
2449	team_nl_team_put(team);
2450
2451	return err;
2452}
2453
2454static int team_nl_send_event_options_get(struct team *team,
2455					  struct list_head *sel_opt_inst_list);
2456
2457static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2458{
2459	struct team *team;
2460	int err = 0;
2461	int i;
2462	struct nlattr *nl_option;
2463	LIST_HEAD(opt_inst_list);
2464
2465	rtnl_lock();
2466
2467	team = team_nl_team_get(info);
2468	if (!team) {
2469		err = -EINVAL;
2470		goto rtnl_unlock;
2471	}
2472
2473	err = -EINVAL;
2474	if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2475		err = -EINVAL;
2476		goto team_put;
2477	}
2478
2479	nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2480		struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2481		struct nlattr *attr;
2482		struct nlattr *attr_data;
 
2483		enum team_option_type opt_type;
2484		int opt_port_ifindex = 0; /* != 0 for per-port options */
2485		u32 opt_array_index = 0;
2486		bool opt_is_array = false;
2487		struct team_option_inst *opt_inst;
2488		char *opt_name;
2489		bool opt_found = false;
2490
2491		if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2492			err = -EINVAL;
2493			goto team_put;
2494		}
2495		err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2496				       nl_option, team_nl_option_policy,
2497				       info->extack);
 
 
2498		if (err)
2499			goto team_put;
2500		if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2501		    !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2502			err = -EINVAL;
2503			goto team_put;
2504		}
2505		switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2506		case NLA_U32:
2507			opt_type = TEAM_OPTION_TYPE_U32;
2508			break;
2509		case NLA_STRING:
2510			opt_type = TEAM_OPTION_TYPE_STRING;
2511			break;
2512		case NLA_BINARY:
2513			opt_type = TEAM_OPTION_TYPE_BINARY;
2514			break;
2515		case NLA_FLAG:
2516			opt_type = TEAM_OPTION_TYPE_BOOL;
2517			break;
2518		case NLA_S32:
2519			opt_type = TEAM_OPTION_TYPE_S32;
2520			break;
2521		default:
2522			goto team_put;
2523		}
2524
2525		attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2526		if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2527			err = -EINVAL;
2528			goto team_put;
2529		}
2530
2531		opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2532		attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2533		if (attr)
2534			opt_port_ifindex = nla_get_u32(attr);
2535
2536		attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2537		if (attr) {
2538			opt_is_array = true;
2539			opt_array_index = nla_get_u32(attr);
2540		}
2541
2542		list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2543			struct team_option *option = opt_inst->option;
2544			struct team_gsetter_ctx ctx;
2545			struct team_option_inst_info *opt_inst_info;
2546			int tmp_ifindex;
2547
2548			opt_inst_info = &opt_inst->info;
2549			tmp_ifindex = opt_inst_info->port ?
2550				      opt_inst_info->port->dev->ifindex : 0;
2551			if (option->type != opt_type ||
2552			    strcmp(option->name, opt_name) ||
2553			    tmp_ifindex != opt_port_ifindex ||
2554			    (option->array_size && !opt_is_array) ||
2555			    opt_inst_info->array_index != opt_array_index)
2556				continue;
2557			opt_found = true;
2558			ctx.info = opt_inst_info;
2559			switch (opt_type) {
2560			case TEAM_OPTION_TYPE_U32:
2561				ctx.data.u32_val = nla_get_u32(attr_data);
2562				break;
2563			case TEAM_OPTION_TYPE_STRING:
2564				if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2565					err = -EINVAL;
2566					goto team_put;
2567				}
2568				ctx.data.str_val = nla_data(attr_data);
2569				break;
2570			case TEAM_OPTION_TYPE_BINARY:
2571				ctx.data.bin_val.len = nla_len(attr_data);
2572				ctx.data.bin_val.ptr = nla_data(attr_data);
2573				break;
2574			case TEAM_OPTION_TYPE_BOOL:
2575				ctx.data.bool_val = attr_data ? true : false;
2576				break;
2577			case TEAM_OPTION_TYPE_S32:
2578				ctx.data.s32_val = nla_get_s32(attr_data);
2579				break;
2580			default:
2581				BUG();
2582			}
2583			err = team_option_set(team, opt_inst, &ctx);
2584			if (err)
2585				goto team_put;
2586			opt_inst->changed = true;
2587
2588			/* dumb/evil user-space can send us duplicate opt,
2589			 * keep only the last one
2590			 */
2591			if (__team_option_inst_tmp_find(&opt_inst_list,
2592							opt_inst))
2593				continue;
2594
2595			list_add(&opt_inst->tmp_list, &opt_inst_list);
2596		}
2597		if (!opt_found) {
2598			err = -ENOENT;
2599			goto team_put;
2600		}
2601	}
2602
2603	err = team_nl_send_event_options_get(team, &opt_inst_list);
 
 
 
2604
2605team_put:
2606	team_nl_team_put(team);
2607rtnl_unlock:
2608	rtnl_unlock();
2609	return err;
2610}
2611
2612static int team_nl_fill_one_port_get(struct sk_buff *skb,
2613				     struct team_port *port)
2614{
2615	struct nlattr *port_item;
2616
2617	port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2618	if (!port_item)
2619		goto nest_cancel;
2620	if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2621		goto nest_cancel;
2622	if (port->changed) {
2623		if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2624			goto nest_cancel;
2625		port->changed = false;
2626	}
2627	if ((port->removed &&
2628	     nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2629	    (port->state.linkup &&
2630	     nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2631	    nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2632	    nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2633		goto nest_cancel;
2634	nla_nest_end(skb, port_item);
2635	return 0;
2636
2637nest_cancel:
2638	nla_nest_cancel(skb, port_item);
2639	return -EMSGSIZE;
2640}
2641
2642static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2643				      int flags, team_nl_send_func_t *send_func,
2644				      struct team_port *one_port)
2645{
2646	struct nlattr *port_list;
2647	struct nlmsghdr *nlh;
2648	void *hdr;
2649	struct team_port *port;
2650	int err;
2651	struct sk_buff *skb = NULL;
2652	bool incomplete;
2653	int i;
2654
2655	port = list_first_entry_or_null(&team->port_list,
2656					struct team_port, list);
2657
2658start_again:
2659	err = __send_and_alloc_skb(&skb, team, portid, send_func);
2660	if (err)
2661		return err;
2662
2663	hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2664			  TEAM_CMD_PORT_LIST_GET);
2665	if (!hdr) {
2666		nlmsg_free(skb);
2667		return -EMSGSIZE;
2668	}
2669
2670	if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2671		goto nla_put_failure;
2672	port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2673	if (!port_list)
2674		goto nla_put_failure;
2675
2676	i = 0;
2677	incomplete = false;
2678
2679	/* If one port is selected, called wants to send port list containing
2680	 * only this port. Otherwise go through all listed ports and send all
2681	 */
2682	if (one_port) {
2683		err = team_nl_fill_one_port_get(skb, one_port);
2684		if (err)
2685			goto errout;
2686	} else if (port) {
2687		list_for_each_entry_from(port, &team->port_list, list) {
2688			err = team_nl_fill_one_port_get(skb, port);
2689			if (err) {
2690				if (err == -EMSGSIZE) {
2691					if (!i)
2692						goto errout;
2693					incomplete = true;
2694					break;
2695				}
2696				goto errout;
2697			}
2698			i++;
2699		}
2700	}
2701
2702	nla_nest_end(skb, port_list);
2703	genlmsg_end(skb, hdr);
2704	if (incomplete)
2705		goto start_again;
2706
2707send_done:
2708	nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2709	if (!nlh) {
2710		err = __send_and_alloc_skb(&skb, team, portid, send_func);
2711		if (err)
2712			return err;
2713		goto send_done;
2714	}
2715
2716	return send_func(skb, team, portid);
2717
2718nla_put_failure:
2719	err = -EMSGSIZE;
2720errout:
2721	genlmsg_cancel(skb, hdr);
2722	nlmsg_free(skb);
2723	return err;
2724}
2725
2726static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2727				     struct genl_info *info)
2728{
2729	struct team *team;
2730	int err;
2731
2732	team = team_nl_team_get(info);
2733	if (!team)
2734		return -EINVAL;
2735
2736	err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2737					 NLM_F_ACK, team_nl_send_unicast, NULL);
2738
2739	team_nl_team_put(team);
2740
2741	return err;
2742}
2743
2744static const struct genl_ops team_nl_ops[] = {
2745	{
2746		.cmd = TEAM_CMD_NOOP,
 
2747		.doit = team_nl_cmd_noop,
2748		.policy = team_nl_policy,
2749	},
2750	{
2751		.cmd = TEAM_CMD_OPTIONS_SET,
 
2752		.doit = team_nl_cmd_options_set,
2753		.policy = team_nl_policy,
2754		.flags = GENL_ADMIN_PERM,
2755	},
2756	{
2757		.cmd = TEAM_CMD_OPTIONS_GET,
 
2758		.doit = team_nl_cmd_options_get,
2759		.policy = team_nl_policy,
2760		.flags = GENL_ADMIN_PERM,
2761	},
2762	{
2763		.cmd = TEAM_CMD_PORT_LIST_GET,
 
2764		.doit = team_nl_cmd_port_list_get,
2765		.policy = team_nl_policy,
2766		.flags = GENL_ADMIN_PERM,
2767	},
2768};
2769
2770static const struct genl_multicast_group team_nl_mcgrps[] = {
2771	{ .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2772};
2773
2774static struct genl_family team_nl_family __ro_after_init = {
2775	.name		= TEAM_GENL_NAME,
2776	.version	= TEAM_GENL_VERSION,
2777	.maxattr	= TEAM_ATTR_MAX,
 
2778	.netnsok	= true,
2779	.module		= THIS_MODULE,
2780	.ops		= team_nl_ops,
2781	.n_ops		= ARRAY_SIZE(team_nl_ops),
 
2782	.mcgrps		= team_nl_mcgrps,
2783	.n_mcgrps	= ARRAY_SIZE(team_nl_mcgrps),
2784};
2785
2786static int team_nl_send_multicast(struct sk_buff *skb,
2787				  struct team *team, u32 portid)
2788{
2789	return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2790				       skb, 0, 0, GFP_KERNEL);
2791}
2792
2793static int team_nl_send_event_options_get(struct team *team,
2794					  struct list_head *sel_opt_inst_list)
2795{
2796	return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2797					sel_opt_inst_list);
2798}
2799
2800static int team_nl_send_event_port_get(struct team *team,
2801				       struct team_port *port)
2802{
2803	return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2804					  port);
2805}
2806
2807static int __init team_nl_init(void)
2808{
2809	return genl_register_family(&team_nl_family);
2810}
2811
2812static void team_nl_fini(void)
2813{
2814	genl_unregister_family(&team_nl_family);
2815}
2816
2817
2818/******************
2819 * Change checkers
2820 ******************/
2821
2822static void __team_options_change_check(struct team *team)
2823{
2824	int err;
2825	struct team_option_inst *opt_inst;
2826	LIST_HEAD(sel_opt_inst_list);
2827
2828	list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2829		if (opt_inst->changed)
2830			list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2831	}
2832	err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2833	if (err && err != -ESRCH)
2834		netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2835			    err);
2836}
2837
2838/* rtnl lock is held */
2839
2840static void __team_port_change_send(struct team_port *port, bool linkup)
2841{
2842	int err;
2843
2844	port->changed = true;
2845	port->state.linkup = linkup;
2846	team_refresh_port_linkup(port);
2847	if (linkup) {
2848		struct ethtool_link_ksettings ecmd;
2849
2850		err = __ethtool_get_link_ksettings(port->dev, &ecmd);
2851		if (!err) {
2852			port->state.speed = ecmd.base.speed;
2853			port->state.duplex = ecmd.base.duplex;
2854			goto send_event;
2855		}
2856	}
2857	port->state.speed = 0;
2858	port->state.duplex = 0;
2859
2860send_event:
2861	err = team_nl_send_event_port_get(port->team, port);
2862	if (err && err != -ESRCH)
2863		netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2864			    port->dev->name, err);
2865
2866}
2867
2868static void __team_carrier_check(struct team *team)
2869{
2870	struct team_port *port;
2871	bool team_linkup;
2872
2873	if (team->user_carrier_enabled)
2874		return;
2875
2876	team_linkup = false;
2877	list_for_each_entry(port, &team->port_list, list) {
2878		if (port->linkup) {
2879			team_linkup = true;
2880			break;
2881		}
2882	}
2883
2884	if (team_linkup)
2885		netif_carrier_on(team->dev);
2886	else
2887		netif_carrier_off(team->dev);
2888}
2889
2890static void __team_port_change_check(struct team_port *port, bool linkup)
2891{
2892	if (port->state.linkup != linkup)
2893		__team_port_change_send(port, linkup);
2894	__team_carrier_check(port->team);
2895}
2896
2897static void __team_port_change_port_added(struct team_port *port, bool linkup)
2898{
2899	__team_port_change_send(port, linkup);
2900	__team_carrier_check(port->team);
2901}
2902
2903static void __team_port_change_port_removed(struct team_port *port)
2904{
2905	port->removed = true;
2906	__team_port_change_send(port, false);
2907	__team_carrier_check(port->team);
2908}
2909
2910static void team_port_change_check(struct team_port *port, bool linkup)
2911{
2912	struct team *team = port->team;
2913
2914	mutex_lock(&team->lock);
2915	__team_port_change_check(port, linkup);
2916	mutex_unlock(&team->lock);
2917}
2918
2919
2920/************************************
2921 * Net device notifier event handler
2922 ************************************/
2923
2924static int team_device_event(struct notifier_block *unused,
2925			     unsigned long event, void *ptr)
2926{
2927	struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2928	struct team_port *port;
2929
2930	port = team_port_get_rtnl(dev);
2931	if (!port)
2932		return NOTIFY_DONE;
2933
2934	switch (event) {
2935	case NETDEV_UP:
2936		if (netif_carrier_ok(dev))
2937			team_port_change_check(port, true);
2938		break;
2939	case NETDEV_DOWN:
2940		team_port_change_check(port, false);
2941		break;
2942	case NETDEV_CHANGE:
2943		if (netif_running(port->dev))
2944			team_port_change_check(port,
2945					       !!netif_carrier_ok(port->dev));
2946		break;
2947	case NETDEV_UNREGISTER:
2948		team_del_slave(port->team->dev, dev);
2949		break;
2950	case NETDEV_FEAT_CHANGE:
2951		team_compute_features(port->team);
 
 
 
 
2952		break;
2953	case NETDEV_PRECHANGEMTU:
2954		/* Forbid to change mtu of underlaying device */
2955		if (!port->team->port_mtu_change_allowed)
2956			return NOTIFY_BAD;
2957		break;
2958	case NETDEV_PRE_TYPE_CHANGE:
2959		/* Forbid to change type of underlaying device */
2960		return NOTIFY_BAD;
2961	case NETDEV_RESEND_IGMP:
2962		/* Propagate to master device */
2963		call_netdevice_notifiers(event, port->team->dev);
2964		break;
2965	}
2966	return NOTIFY_DONE;
2967}
2968
2969static struct notifier_block team_notifier_block __read_mostly = {
2970	.notifier_call = team_device_event,
2971};
2972
2973
2974/***********************
2975 * Module init and exit
2976 ***********************/
2977
2978static int __init team_module_init(void)
2979{
2980	int err;
2981
2982	register_netdevice_notifier(&team_notifier_block);
2983
2984	err = rtnl_link_register(&team_link_ops);
2985	if (err)
2986		goto err_rtnl_reg;
2987
2988	err = team_nl_init();
2989	if (err)
2990		goto err_nl_init;
2991
2992	return 0;
2993
2994err_nl_init:
2995	rtnl_link_unregister(&team_link_ops);
2996
2997err_rtnl_reg:
2998	unregister_netdevice_notifier(&team_notifier_block);
2999
3000	return err;
3001}
3002
3003static void __exit team_module_exit(void)
3004{
3005	team_nl_fini();
3006	rtnl_link_unregister(&team_link_ops);
3007	unregister_netdevice_notifier(&team_notifier_block);
3008}
3009
3010module_init(team_module_init);
3011module_exit(team_module_exit);
3012
3013MODULE_LICENSE("GPL v2");
3014MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
3015MODULE_DESCRIPTION("Ethernet team device driver");
3016MODULE_ALIAS_RTNL_LINK(DRV_NAME);