1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * drivers/net/team/team.c - Network team device driver
   4 * Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com>
 
 
 
 
 
   5 */
   6
   7#include <linux/ethtool.h>
   8#include <linux/kernel.h>
   9#include <linux/types.h>
  10#include <linux/module.h>
  11#include <linux/init.h>
  12#include <linux/slab.h>
  13#include <linux/rcupdate.h>
  14#include <linux/errno.h>
  15#include <linux/ctype.h>
  16#include <linux/notifier.h>
  17#include <linux/netdevice.h>
  18#include <linux/netpoll.h>
  19#include <linux/if_vlan.h>
  20#include <linux/if_arp.h>
  21#include <linux/socket.h>
  22#include <linux/etherdevice.h>
  23#include <linux/rtnetlink.h>
  24#include <net/rtnetlink.h>
  25#include <net/genetlink.h>
  26#include <net/netlink.h>
  27#include <net/sch_generic.h>
  28#include <generated/utsrelease.h>
  29#include <linux/if_team.h>
  30
  31#define DRV_NAME "team"
  32
  33
  34/**********
  35 * Helpers
  36 **********/
  37
 
 
 
 
 
 
 
 
 
  38static struct team_port *team_port_get_rtnl(const struct net_device *dev)
  39{
  40	struct team_port *port = rtnl_dereference(dev->rx_handler_data);
  41
  42	return netif_is_team_port(dev) ? port : NULL;
  43}
  44
  45/*
  46 * Since the ability to change device address for open port device is tested in
  47 * team_port_add, this function can be called without control of return value
  48 */
  49static int __set_port_dev_addr(struct net_device *port_dev,
  50			       const unsigned char *dev_addr)
  51{
  52	struct sockaddr_storage addr;
  53
  54	memcpy(addr.__data, dev_addr, port_dev->addr_len);
  55	addr.ss_family = port_dev->type;
  56	return dev_set_mac_address(port_dev, (struct sockaddr *)&addr, NULL);
  57}
  58
  59static int team_port_set_orig_dev_addr(struct team_port *port)
  60{
  61	return __set_port_dev_addr(port->dev, port->orig.dev_addr);
  62}
  63
  64static int team_port_set_team_dev_addr(struct team *team,
  65				       struct team_port *port)
  66{
  67	return __set_port_dev_addr(port->dev, team->dev->dev_addr);
  68}
  69
  70int team_modeop_port_enter(struct team *team, struct team_port *port)
  71{
  72	return team_port_set_team_dev_addr(team, port);
  73}
  74EXPORT_SYMBOL(team_modeop_port_enter);
  75
  76void team_modeop_port_change_dev_addr(struct team *team,
  77				      struct team_port *port)
  78{
  79	team_port_set_team_dev_addr(team, port);
  80}
  81EXPORT_SYMBOL(team_modeop_port_change_dev_addr);
  82
  83static void team_lower_state_changed(struct team_port *port)
  84{
  85	struct netdev_lag_lower_state_info info;
  86
  87	info.link_up = port->linkup;
  88	info.tx_enabled = team_port_enabled(port);
  89	netdev_lower_state_changed(port->dev, &info);
  90}
  91
  92static void team_refresh_port_linkup(struct team_port *port)
  93{
  94	bool new_linkup = port->user.linkup_enabled ? port->user.linkup :
  95						      port->state.linkup;
  96
  97	if (port->linkup != new_linkup) {
  98		port->linkup = new_linkup;
  99		team_lower_state_changed(port);
 100	}
 101}
 102
 103
 104/*******************
 105 * Options handling
 106 *******************/
 107
 108struct team_option_inst { /* One for each option instance */
 109	struct list_head list;
 110	struct list_head tmp_list;
 111	struct team_option *option;
 112	struct team_option_inst_info info;
 113	bool changed;
 114	bool removed;
 115};
 116
 117static struct team_option *__team_find_option(struct team *team,
 118					      const char *opt_name)
 119{
 120	struct team_option *option;
 121
 122	list_for_each_entry(option, &team->option_list, list) {
 123		if (strcmp(option->name, opt_name) == 0)
 124			return option;
 125	}
 126	return NULL;
 127}
 128
 129static void __team_option_inst_del(struct team_option_inst *opt_inst)
 130{
 131	list_del(&opt_inst->list);
 132	kfree(opt_inst);
 133}
 134
 135static void __team_option_inst_del_option(struct team *team,
 136					  struct team_option *option)
 137{
 138	struct team_option_inst *opt_inst, *tmp;
 139
 140	list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 141		if (opt_inst->option == option)
 142			__team_option_inst_del(opt_inst);
 143	}
 144}
 145
 146static int __team_option_inst_add(struct team *team, struct team_option *option,
 147				  struct team_port *port)
 148{
 149	struct team_option_inst *opt_inst;
 150	unsigned int array_size;
 151	unsigned int i;
 
 152
 153	array_size = option->array_size;
 154	if (!array_size)
 155		array_size = 1; /* No array but still need one instance */
 156
 157	for (i = 0; i < array_size; i++) {
 158		opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL);
 159		if (!opt_inst)
 160			return -ENOMEM;
 161		opt_inst->option = option;
 162		opt_inst->info.port = port;
 163		opt_inst->info.array_index = i;
 164		opt_inst->changed = true;
 165		opt_inst->removed = false;
 166		list_add_tail(&opt_inst->list, &team->option_inst_list);
 167		if (option->init)
 168			option->init(team, &opt_inst->info);
 
 
 
 169
 170	}
 171	return 0;
 172}
 173
 174static int __team_option_inst_add_option(struct team *team,
 175					 struct team_option *option)
 176{
 
 177	int err;
 178
 179	if (!option->per_port) {
 180		err = __team_option_inst_add(team, option, NULL);
 181		if (err)
 182			goto inst_del_option;
 183	}
 
 
 
 
 
 
 184	return 0;
 185
 186inst_del_option:
 187	__team_option_inst_del_option(team, option);
 188	return err;
 189}
 190
 191static void __team_option_inst_mark_removed_option(struct team *team,
 192						   struct team_option *option)
 193{
 194	struct team_option_inst *opt_inst;
 195
 196	list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 197		if (opt_inst->option == option) {
 198			opt_inst->changed = true;
 199			opt_inst->removed = true;
 200		}
 201	}
 202}
 203
 204static void __team_option_inst_del_port(struct team *team,
 205					struct team_port *port)
 206{
 207	struct team_option_inst *opt_inst, *tmp;
 208
 209	list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
 210		if (opt_inst->option->per_port &&
 211		    opt_inst->info.port == port)
 212			__team_option_inst_del(opt_inst);
 213	}
 214}
 215
 216static int __team_option_inst_add_port(struct team *team,
 217				       struct team_port *port)
 218{
 219	struct team_option *option;
 220	int err;
 221
 222	list_for_each_entry(option, &team->option_list, list) {
 223		if (!option->per_port)
 224			continue;
 225		err = __team_option_inst_add(team, option, port);
 226		if (err)
 227			goto inst_del_port;
 228	}
 229	return 0;
 230
 231inst_del_port:
 232	__team_option_inst_del_port(team, port);
 233	return err;
 234}
 235
 236static void __team_option_inst_mark_removed_port(struct team *team,
 237						 struct team_port *port)
 238{
 239	struct team_option_inst *opt_inst;
 240
 241	list_for_each_entry(opt_inst, &team->option_inst_list, list) {
 242		if (opt_inst->info.port == port) {
 243			opt_inst->changed = true;
 244			opt_inst->removed = true;
 245		}
 246	}
 247}
 248
 249static int __team_options_register(struct team *team,
 250				   const struct team_option *option,
 251				   size_t option_count)
 252{
 253	int i;
 254	struct team_option **dst_opts;
 255	int err;
 256
 257	dst_opts = kcalloc(option_count, sizeof(struct team_option *),
 258			   GFP_KERNEL);
 259	if (!dst_opts)
 260		return -ENOMEM;
 261	for (i = 0; i < option_count; i++, option++) {
 262		if (__team_find_option(team, option->name)) {
 263			err = -EEXIST;
 264			goto alloc_rollback;
 265		}
 266		dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
 267		if (!dst_opts[i]) {
 268			err = -ENOMEM;
 269			goto alloc_rollback;
 270		}
 271	}
 272
 273	for (i = 0; i < option_count; i++) {
 274		err = __team_option_inst_add_option(team, dst_opts[i]);
 275		if (err)
 276			goto inst_rollback;
 277		list_add_tail(&dst_opts[i]->list, &team->option_list);
 278	}
 279
 280	kfree(dst_opts);
 281	return 0;
 282
 283inst_rollback:
 284	for (i--; i >= 0; i--) {
 285		__team_option_inst_del_option(team, dst_opts[i]);
 286		list_del(&dst_opts[i]->list);
 287	}
 288
 289	i = option_count;
 290alloc_rollback:
 291	for (i--; i >= 0; i--)
 292		kfree(dst_opts[i]);
 293
 294	kfree(dst_opts);
 295	return err;
 296}
 297
 298static void __team_options_mark_removed(struct team *team,
 299					const struct team_option *option,
 300					size_t option_count)
 301{
 302	int i;
 303
 304	for (i = 0; i < option_count; i++, option++) {
 305		struct team_option *del_opt;
 306
 307		del_opt = __team_find_option(team, option->name);
 308		if (del_opt)
 309			__team_option_inst_mark_removed_option(team, del_opt);
 310	}
 311}
 312
 313static void __team_options_unregister(struct team *team,
 314				      const struct team_option *option,
 315				      size_t option_count)
 316{
 317	int i;
 318
 319	for (i = 0; i < option_count; i++, option++) {
 320		struct team_option *del_opt;
 321
 322		del_opt = __team_find_option(team, option->name);
 323		if (del_opt) {
 324			__team_option_inst_del_option(team, del_opt);
 325			list_del(&del_opt->list);
 326			kfree(del_opt);
 327		}
 328	}
 329}
 330
 331static void __team_options_change_check(struct team *team);
 332
 333int team_options_register(struct team *team,
 334			  const struct team_option *option,
 335			  size_t option_count)
 336{
 337	int err;
 338
 339	err = __team_options_register(team, option, option_count);
 340	if (err)
 341		return err;
 342	__team_options_change_check(team);
 343	return 0;
 344}
 345EXPORT_SYMBOL(team_options_register);
 346
 347void team_options_unregister(struct team *team,
 348			     const struct team_option *option,
 349			     size_t option_count)
 350{
 351	__team_options_mark_removed(team, option, option_count);
 352	__team_options_change_check(team);
 353	__team_options_unregister(team, option, option_count);
 354}
 355EXPORT_SYMBOL(team_options_unregister);
 356
 357static int team_option_get(struct team *team,
 358			   struct team_option_inst *opt_inst,
 359			   struct team_gsetter_ctx *ctx)
 360{
 361	if (!opt_inst->option->getter)
 362		return -EOPNOTSUPP;
 363
 364	opt_inst->option->getter(team, ctx);
 365	return 0;
 366}
 367
 368static int team_option_set(struct team *team,
 369			   struct team_option_inst *opt_inst,
 370			   struct team_gsetter_ctx *ctx)
 371{
 372	if (!opt_inst->option->setter)
 373		return -EOPNOTSUPP;
 374	return opt_inst->option->setter(team, ctx);
 375}
 376
 377void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info)
 378{
 379	struct team_option_inst *opt_inst;
 380
 381	opt_inst = container_of(opt_inst_info, struct team_option_inst, info);
 382	opt_inst->changed = true;
 383}
 384EXPORT_SYMBOL(team_option_inst_set_change);
 385
 386void team_options_change_check(struct team *team)
 387{
 388	__team_options_change_check(team);
 389}
 390EXPORT_SYMBOL(team_options_change_check);
 391
 392
 393/****************
 394 * Mode handling
 395 ****************/
 396
 397static LIST_HEAD(mode_list);
 398static DEFINE_SPINLOCK(mode_list_lock);
 399
 400struct team_mode_item {
 401	struct list_head list;
 402	const struct team_mode *mode;
 403};
 404
 405static struct team_mode_item *__find_mode(const char *kind)
 406{
 407	struct team_mode_item *mitem;
 408
 409	list_for_each_entry(mitem, &mode_list, list) {
 410		if (strcmp(mitem->mode->kind, kind) == 0)
 411			return mitem;
 412	}
 413	return NULL;
 414}
 415
 416static bool is_good_mode_name(const char *name)
 417{
 418	while (*name != '\0') {
 419		if (!isalpha(*name) && !isdigit(*name) && *name != '_')
 420			return false;
 421		name++;
 422	}
 423	return true;
 424}
 425
 426int team_mode_register(const struct team_mode *mode)
 427{
 428	int err = 0;
 429	struct team_mode_item *mitem;
 430
 431	if (!is_good_mode_name(mode->kind) ||
 432	    mode->priv_size > TEAM_MODE_PRIV_SIZE)
 433		return -EINVAL;
 434
 435	mitem = kmalloc(sizeof(*mitem), GFP_KERNEL);
 436	if (!mitem)
 437		return -ENOMEM;
 438
 439	spin_lock(&mode_list_lock);
 440	if (__find_mode(mode->kind)) {
 441		err = -EEXIST;
 442		kfree(mitem);
 443		goto unlock;
 444	}
 445	mitem->mode = mode;
 446	list_add_tail(&mitem->list, &mode_list);
 447unlock:
 448	spin_unlock(&mode_list_lock);
 449	return err;
 450}
 451EXPORT_SYMBOL(team_mode_register);
 452
 453void team_mode_unregister(const struct team_mode *mode)
 454{
 455	struct team_mode_item *mitem;
 456
 457	spin_lock(&mode_list_lock);
 458	mitem = __find_mode(mode->kind);
 459	if (mitem) {
 460		list_del_init(&mitem->list);
 461		kfree(mitem);
 462	}
 463	spin_unlock(&mode_list_lock);
 464}
 465EXPORT_SYMBOL(team_mode_unregister);
 466
 467static const struct team_mode *team_mode_get(const char *kind)
 468{
 469	struct team_mode_item *mitem;
 470	const struct team_mode *mode = NULL;
 471
 472	if (!try_module_get(THIS_MODULE))
 473		return NULL;
 474
 475	spin_lock(&mode_list_lock);
 476	mitem = __find_mode(kind);
 477	if (!mitem) {
 478		spin_unlock(&mode_list_lock);
 479		request_module("team-mode-%s", kind);
 480		spin_lock(&mode_list_lock);
 481		mitem = __find_mode(kind);
 482	}
 483	if (mitem) {
 484		mode = mitem->mode;
 485		if (!try_module_get(mode->owner))
 486			mode = NULL;
 487	}
 488
 489	spin_unlock(&mode_list_lock);
 490	module_put(THIS_MODULE);
 491	return mode;
 492}
 493
 494static void team_mode_put(const struct team_mode *mode)
 495{
 496	module_put(mode->owner);
 497}
 498
 499static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
 500{
 501	dev_kfree_skb_any(skb);
 502	return false;
 503}
 504
 505static rx_handler_result_t team_dummy_receive(struct team *team,
 506					      struct team_port *port,
 507					      struct sk_buff *skb)
 508{
 509	return RX_HANDLER_ANOTHER;
 510}
 511
 512static const struct team_mode __team_no_mode = {
 513	.kind		= "*NOMODE*",
 514};
 515
 516static bool team_is_mode_set(struct team *team)
 517{
 518	return team->mode != &__team_no_mode;
 519}
 520
 521static void team_set_no_mode(struct team *team)
 522{
 523	team->user_carrier_enabled = false;
 524	team->mode = &__team_no_mode;
 525}
 526
 527static void team_adjust_ops(struct team *team)
 528{
 529	/*
 530	 * To avoid checks in rx/tx skb paths, ensure here that non-null and
 531	 * correct ops are always set.
 532	 */
 533
 534	if (!team->en_port_count || !team_is_mode_set(team) ||
 535	    !team->mode->ops->transmit)
 536		team->ops.transmit = team_dummy_transmit;
 537	else
 538		team->ops.transmit = team->mode->ops->transmit;
 539
 540	if (!team->en_port_count || !team_is_mode_set(team) ||
 541	    !team->mode->ops->receive)
 542		team->ops.receive = team_dummy_receive;
 543	else
 544		team->ops.receive = team->mode->ops->receive;
 545}
 546
 547/*
 548 * We can benefit from the fact that it's ensured no port is present
 549 * at the time of mode change. Therefore no packets are in fly so there's no
 550 * need to set mode operations in any special way.
 551 */
 552static int __team_change_mode(struct team *team,
 553			      const struct team_mode *new_mode)
 554{
 555	/* Check if mode was previously set and do cleanup if so */
 556	if (team_is_mode_set(team)) {
 557		void (*exit_op)(struct team *team) = team->ops.exit;
 558
 559		/* Clear ops area so no callback is called any longer */
 560		memset(&team->ops, 0, sizeof(struct team_mode_ops));
 561		team_adjust_ops(team);
 562
 563		if (exit_op)
 564			exit_op(team);
 565		team_mode_put(team->mode);
 566		team_set_no_mode(team);
 567		/* zero private data area */
 568		memset(&team->mode_priv, 0,
 569		       sizeof(struct team) - offsetof(struct team, mode_priv));
 570	}
 571
 572	if (!new_mode)
 573		return 0;
 574
 575	if (new_mode->ops->init) {
 576		int err;
 577
 578		err = new_mode->ops->init(team);
 579		if (err)
 580			return err;
 581	}
 582
 583	team->mode = new_mode;
 584	memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
 585	team_adjust_ops(team);
 586
 587	return 0;
 588}
 589
 590static int team_change_mode(struct team *team, const char *kind)
 591{
 592	const struct team_mode *new_mode;
 593	struct net_device *dev = team->dev;
 594	int err;
 595
 596	if (!list_empty(&team->port_list)) {
 597		netdev_err(dev, "No ports can be present during mode change\n");
 598		return -EBUSY;
 599	}
 600
 601	if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) {
 602		netdev_err(dev, "Unable to change to the same mode the team is in\n");
 603		return -EINVAL;
 604	}
 605
 606	new_mode = team_mode_get(kind);
 607	if (!new_mode) {
 608		netdev_err(dev, "Mode \"%s\" not found\n", kind);
 609		return -EINVAL;
 610	}
 611
 612	err = __team_change_mode(team, new_mode);
 613	if (err) {
 614		netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
 615		team_mode_put(new_mode);
 616		return err;
 617	}
 618
 619	netdev_info(dev, "Mode changed to \"%s\"\n", kind);
 620	return 0;
 621}
 622
 623
 624/*********************
 625 * Peers notification
 626 *********************/
 627
 628static void team_notify_peers_work(struct work_struct *work)
 629{
 630	struct team *team;
 631	int val;
 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	val = atomic_dec_if_positive(&team->notify_peers.count_pending);
 640	if (val < 0) {
 641		rtnl_unlock();
 642		return;
 643	}
 644	call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, team->dev);
 645	rtnl_unlock();
 646	if (val)
 647		schedule_delayed_work(&team->notify_peers.dw,
 648				      msecs_to_jiffies(team->notify_peers.interval));
 649}
 650
 651static void team_notify_peers(struct team *team)
 652{
 653	if (!team->notify_peers.count || !netif_running(team->dev))
 654		return;
 655	atomic_add(team->notify_peers.count, &team->notify_peers.count_pending);
 656	schedule_delayed_work(&team->notify_peers.dw, 0);
 657}
 658
 659static void team_notify_peers_init(struct team *team)
 660{
 661	INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work);
 662}
 663
 664static void team_notify_peers_fini(struct team *team)
 665{
 666	cancel_delayed_work_sync(&team->notify_peers.dw);
 667}
 668
 669
 670/*******************************
 671 * Send multicast group rejoins
 672 *******************************/
 673
 674static void team_mcast_rejoin_work(struct work_struct *work)
 675{
 676	struct team *team;
 677	int val;
 678
 679	team = container_of(work, struct team, mcast_rejoin.dw.work);
 680
 681	if (!rtnl_trylock()) {
 682		schedule_delayed_work(&team->mcast_rejoin.dw, 0);
 683		return;
 684	}
 685	val = atomic_dec_if_positive(&team->mcast_rejoin.count_pending);
 686	if (val < 0) {
 687		rtnl_unlock();
 688		return;
 689	}
 690	call_netdevice_notifiers(NETDEV_RESEND_IGMP, team->dev);
 691	rtnl_unlock();
 692	if (val)
 693		schedule_delayed_work(&team->mcast_rejoin.dw,
 694				      msecs_to_jiffies(team->mcast_rejoin.interval));
 695}
 696
 697static void team_mcast_rejoin(struct team *team)
 698{
 699	if (!team->mcast_rejoin.count || !netif_running(team->dev))
 700		return;
 701	atomic_add(team->mcast_rejoin.count, &team->mcast_rejoin.count_pending);
 702	schedule_delayed_work(&team->mcast_rejoin.dw, 0);
 703}
 704
 705static void team_mcast_rejoin_init(struct team *team)
 706{
 707	INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work);
 708}
 709
 710static void team_mcast_rejoin_fini(struct team *team)
 711{
 712	cancel_delayed_work_sync(&team->mcast_rejoin.dw);
 713}
 714
 715
 716/************************
 717 * Rx path frame handler
 718 ************************/
 719
 720/* note: already called with rcu_read_lock */
 721static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
 722{
 723	struct sk_buff *skb = *pskb;
 724	struct team_port *port;
 725	struct team *team;
 726	rx_handler_result_t res;
 727
 728	skb = skb_share_check(skb, GFP_ATOMIC);
 729	if (!skb)
 730		return RX_HANDLER_CONSUMED;
 731
 732	*pskb = skb;
 733
 734	port = team_port_get_rcu(skb->dev);
 735	team = port->team;
 736	if (!team_port_enabled(port)) {
 737		if (is_link_local_ether_addr(eth_hdr(skb)->h_dest))
 738			/* link-local packets are mostly useful when stack receives them
 739			 * with the link they arrive on.
 740			 */
 741			return RX_HANDLER_PASS;
 742		/* allow exact match delivery for disabled ports */
 743		res = RX_HANDLER_EXACT;
 744	} else {
 745		res = team->ops.receive(team, port, skb);
 746	}
 747	if (res == RX_HANDLER_ANOTHER) {
 748		struct team_pcpu_stats *pcpu_stats;
 749
 750		pcpu_stats = this_cpu_ptr(team->pcpu_stats);
 751		u64_stats_update_begin(&pcpu_stats->syncp);
 752		u64_stats_inc(&pcpu_stats->rx_packets);
 753		u64_stats_add(&pcpu_stats->rx_bytes, skb->len);
 754		if (skb->pkt_type == PACKET_MULTICAST)
 755			u64_stats_inc(&pcpu_stats->rx_multicast);
 756		u64_stats_update_end(&pcpu_stats->syncp);
 757
 758		skb->dev = team->dev;
 759	} else if (res == RX_HANDLER_EXACT) {
 760		this_cpu_inc(team->pcpu_stats->rx_nohandler);
 761	} else {
 762		this_cpu_inc(team->pcpu_stats->rx_dropped);
 763	}
 764
 765	return res;
 766}
 767
 768
 769/*************************************
 770 * Multiqueue Tx port select override
 771 *************************************/
 772
 773static int team_queue_override_init(struct team *team)
 774{
 775	struct list_head *listarr;
 776	unsigned int queue_cnt = team->dev->num_tx_queues - 1;
 777	unsigned int i;
 778
 779	if (!queue_cnt)
 780		return 0;
 781	listarr = kmalloc_array(queue_cnt, sizeof(struct list_head),
 782				GFP_KERNEL);
 783	if (!listarr)
 784		return -ENOMEM;
 785	team->qom_lists = listarr;
 786	for (i = 0; i < queue_cnt; i++)
 787		INIT_LIST_HEAD(listarr++);
 788	return 0;
 789}
 790
 791static void team_queue_override_fini(struct team *team)
 792{
 793	kfree(team->qom_lists);
 794}
 795
 796static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
 797{
 798	return &team->qom_lists[queue_id - 1];
 799}
 800
 801/*
 802 * note: already called with rcu_read_lock
 803 */
 804static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
 805{
 806	struct list_head *qom_list;
 807	struct team_port *port;
 808
 809	if (!team->queue_override_enabled || !skb->queue_mapping)
 810		return false;
 811	qom_list = __team_get_qom_list(team, skb->queue_mapping);
 812	list_for_each_entry_rcu(port, qom_list, qom_list) {
 813		if (!team_dev_queue_xmit(team, port, skb))
 814			return true;
 815	}
 816	return false;
 817}
 818
 819static void __team_queue_override_port_del(struct team *team,
 820					   struct team_port *port)
 821{
 822	if (!port->queue_id)
 823		return;
 824	list_del_rcu(&port->qom_list);
 825}
 826
 827static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
 828						      struct team_port *cur)
 829{
 830	if (port->priority < cur->priority)
 831		return true;
 832	if (port->priority > cur->priority)
 833		return false;
 834	if (port->index < cur->index)
 835		return true;
 836	return false;
 837}
 838
 839static void __team_queue_override_port_add(struct team *team,
 840					   struct team_port *port)
 841{
 842	struct team_port *cur;
 843	struct list_head *qom_list;
 844	struct list_head *node;
 845
 846	if (!port->queue_id)
 847		return;
 848	qom_list = __team_get_qom_list(team, port->queue_id);
 849	node = qom_list;
 850	list_for_each_entry(cur, qom_list, qom_list) {
 851		if (team_queue_override_port_has_gt_prio_than(port, cur))
 852			break;
 853		node = &cur->qom_list;
 854	}
 855	list_add_tail_rcu(&port->qom_list, node);
 856}
 857
 858static void __team_queue_override_enabled_check(struct team *team)
 859{
 860	struct team_port *port;
 861	bool enabled = false;
 862
 863	list_for_each_entry(port, &team->port_list, list) {
 864		if (port->queue_id) {
 865			enabled = true;
 866			break;
 867		}
 868	}
 869	if (enabled == team->queue_override_enabled)
 870		return;
 871	netdev_dbg(team->dev, "%s queue override\n",
 872		   enabled ? "Enabling" : "Disabling");
 873	team->queue_override_enabled = enabled;
 874}
 875
 876static void team_queue_override_port_prio_changed(struct team *team,
 877						  struct team_port *port)
 878{
 879	if (!port->queue_id || team_port_enabled(port))
 880		return;
 881	__team_queue_override_port_del(team, port);
 882	__team_queue_override_port_add(team, port);
 883	__team_queue_override_enabled_check(team);
 884}
 885
 886static void team_queue_override_port_change_queue_id(struct team *team,
 887						     struct team_port *port,
 888						     u16 new_queue_id)
 889{
 890	if (team_port_enabled(port)) {
 891		__team_queue_override_port_del(team, port);
 892		port->queue_id = new_queue_id;
 893		__team_queue_override_port_add(team, port);
 894		__team_queue_override_enabled_check(team);
 895	} else {
 896		port->queue_id = new_queue_id;
 897	}
 898}
 899
 900static void team_queue_override_port_add(struct team *team,
 901					 struct team_port *port)
 902{
 903	__team_queue_override_port_add(team, port);
 904	__team_queue_override_enabled_check(team);
 905}
 906
 907static void team_queue_override_port_del(struct team *team,
 908					 struct team_port *port)
 909{
 910	__team_queue_override_port_del(team, port);
 911	__team_queue_override_enabled_check(team);
 912}
 913
 914
 915/****************
 916 * Port handling
 917 ****************/
 918
 919static bool team_port_find(const struct team *team,
 920			   const struct team_port *port)
 921{
 922	struct team_port *cur;
 923
 924	list_for_each_entry(cur, &team->port_list, list)
 925		if (cur == port)
 926			return true;
 927	return false;
 928}
 929
 930/*
 931 * Enable/disable port by adding to enabled port hashlist and setting
 932 * port->index (Might be racy so reader could see incorrect ifindex when
 933 * processing a flying packet, but that is not a problem). Write guarded
 934 * by team->lock.
 935 */
 936static void team_port_enable(struct team *team,
 937			     struct team_port *port)
 938{
 939	if (team_port_enabled(port))
 940		return;
 941	port->index = team->en_port_count++;
 942	hlist_add_head_rcu(&port->hlist,
 943			   team_port_index_hash(team, port->index));
 944	team_adjust_ops(team);
 945	team_queue_override_port_add(team, port);
 946	if (team->ops.port_enabled)
 947		team->ops.port_enabled(team, port);
 948	team_notify_peers(team);
 949	team_mcast_rejoin(team);
 950	team_lower_state_changed(port);
 951}
 952
 953static void __reconstruct_port_hlist(struct team *team, int rm_index)
 954{
 955	int i;
 956	struct team_port *port;
 957
 958	for (i = rm_index + 1; i < team->en_port_count; i++) {
 959		port = team_get_port_by_index(team, i);
 960		hlist_del_rcu(&port->hlist);
 961		port->index--;
 962		hlist_add_head_rcu(&port->hlist,
 963				   team_port_index_hash(team, port->index));
 964	}
 965}
 966
 967static void team_port_disable(struct team *team,
 968			      struct team_port *port)
 969{
 970	if (!team_port_enabled(port))
 971		return;
 972	if (team->ops.port_disabled)
 973		team->ops.port_disabled(team, port);
 974	hlist_del_rcu(&port->hlist);
 975	__reconstruct_port_hlist(team, port->index);
 976	port->index = -1;
 977	team->en_port_count--;
 978	team_queue_override_port_del(team, port);
 979	team_adjust_ops(team);
 980	team_lower_state_changed(port);
 
 981}
 982
 983#define TEAM_VLAN_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
 984			    NETIF_F_FRAGLIST | NETIF_F_GSO_SOFTWARE | \
 985			    NETIF_F_HIGHDMA | NETIF_F_LRO)
 986
 987#define TEAM_ENC_FEATURES	(NETIF_F_HW_CSUM | NETIF_F_SG | \
 988				 NETIF_F_RXCSUM | NETIF_F_GSO_SOFTWARE)
 989
 990static void __team_compute_features(struct team *team)
 991{
 992	struct team_port *port;
 993	netdev_features_t vlan_features = TEAM_VLAN_FEATURES &
 994					  NETIF_F_ALL_FOR_ALL;
 995	netdev_features_t enc_features  = TEAM_ENC_FEATURES;
 996	unsigned short max_hard_header_len = ETH_HLEN;
 997	unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE |
 998					IFF_XMIT_DST_RELEASE_PERM;
 999
1000	rcu_read_lock();
1001	list_for_each_entry_rcu(port, &team->port_list, list) {
1002		vlan_features = netdev_increment_features(vlan_features,
1003					port->dev->vlan_features,
1004					TEAM_VLAN_FEATURES);
1005		enc_features =
1006			netdev_increment_features(enc_features,
1007						  port->dev->hw_enc_features,
1008						  TEAM_ENC_FEATURES);
1009
1010
1011		dst_release_flag &= port->dev->priv_flags;
1012		if (port->dev->hard_header_len > max_hard_header_len)
1013			max_hard_header_len = port->dev->hard_header_len;
1014	}
1015	rcu_read_unlock();
1016
1017	team->dev->vlan_features = vlan_features;
1018	team->dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL |
1019				     NETIF_F_HW_VLAN_CTAG_TX |
1020				     NETIF_F_HW_VLAN_STAG_TX;
1021	team->dev->hard_header_len = max_hard_header_len;
1022
1023	team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
1024	if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
1025		team->dev->priv_flags |= IFF_XMIT_DST_RELEASE;
 
1026}
1027
1028static void team_compute_features(struct team *team)
1029{
 
1030	__team_compute_features(team);
1031	netdev_change_features(team->dev);
1032}
1033
1034static int team_port_enter(struct team *team, struct team_port *port)
1035{
1036	int err = 0;
1037
1038	dev_hold(team->dev);
 
1039	if (team->ops.port_enter) {
1040		err = team->ops.port_enter(team, port);
1041		if (err) {
1042			netdev_err(team->dev, "Device %s failed to enter team mode\n",
1043				   port->dev->name);
1044			goto err_port_enter;
1045		}
1046	}
1047
1048	return 0;
1049
1050err_port_enter:
 
1051	dev_put(team->dev);
1052
1053	return err;
1054}
1055
1056static void team_port_leave(struct team *team, struct team_port *port)
1057{
1058	if (team->ops.port_leave)
1059		team->ops.port_leave(team, port);
 
1060	dev_put(team->dev);
1061}
1062
1063#ifdef CONFIG_NET_POLL_CONTROLLER
1064static int __team_port_enable_netpoll(struct team_port *port)
1065{
1066	struct netpoll *np;
1067	int err;
1068
 
 
 
1069	np = kzalloc(sizeof(*np), GFP_KERNEL);
1070	if (!np)
1071		return -ENOMEM;
1072
1073	err = __netpoll_setup(np, port->dev);
1074	if (err) {
1075		kfree(np);
1076		return err;
1077	}
1078	port->np = np;
1079	return err;
1080}
1081
1082static int team_port_enable_netpoll(struct team_port *port)
1083{
1084	if (!port->team->dev->npinfo)
1085		return 0;
1086
1087	return __team_port_enable_netpoll(port);
1088}
1089
1090static void team_port_disable_netpoll(struct team_port *port)
1091{
1092	struct netpoll *np = port->np;
1093
1094	if (!np)
1095		return;
1096	port->np = NULL;
1097
1098	__netpoll_free(np);
 
 
 
1099}
1100#else
1101static int team_port_enable_netpoll(struct team_port *port)
1102{
1103	return 0;
1104}
1105static void team_port_disable_netpoll(struct team_port *port)
1106{
1107}
1108#endif
1109
1110static int team_upper_dev_link(struct team *team, struct team_port *port,
1111			       struct netlink_ext_ack *extack)
1112{
1113	struct netdev_lag_upper_info lag_upper_info;
1114	int err;
1115
1116	lag_upper_info.tx_type = team->mode->lag_tx_type;
1117	lag_upper_info.hash_type = NETDEV_LAG_HASH_UNKNOWN;
1118	err = netdev_master_upper_dev_link(port->dev, team->dev, NULL,
1119					   &lag_upper_info, extack);
1120	if (err)
1121		return err;
1122	port->dev->priv_flags |= IFF_TEAM_PORT;
1123	return 0;
1124}
1125
1126static void team_upper_dev_unlink(struct team *team, struct team_port *port)
1127{
1128	netdev_upper_dev_unlink(port->dev, team->dev);
1129	port->dev->priv_flags &= ~IFF_TEAM_PORT;
1130}
1131
1132static void __team_port_change_port_added(struct team_port *port, bool linkup);
1133static int team_dev_type_check_change(struct net_device *dev,
1134				      struct net_device *port_dev);
1135
1136static int team_port_add(struct team *team, struct net_device *port_dev,
1137			 struct netlink_ext_ack *extack)
1138{
1139	struct net_device *dev = team->dev;
1140	struct team_port *port;
1141	char *portname = port_dev->name;
1142	int err;
1143
1144	if (port_dev->flags & IFF_LOOPBACK) {
1145		NL_SET_ERR_MSG(extack, "Loopback device can't be added as a team port");
1146		netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1147			   portname);
1148		return -EINVAL;
1149	}
1150
1151	if (netif_is_team_port(port_dev)) {
1152		NL_SET_ERR_MSG(extack, "Device is already a port of a team device");
1153		netdev_err(dev, "Device %s is already a port "
1154				"of a team device\n", portname);
1155		return -EBUSY;
1156	}
1157
1158	if (dev == port_dev) {
1159		NL_SET_ERR_MSG(extack, "Cannot enslave team device to itself");
1160		netdev_err(dev, "Cannot enslave team device to itself\n");
1161		return -EINVAL;
1162	}
1163
1164	if (netdev_has_upper_dev(dev, port_dev)) {
1165		NL_SET_ERR_MSG(extack, "Device is already an upper device of the team interface");
1166		netdev_err(dev, "Device %s is already an upper device of the team interface\n",
1167			   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, extack);
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	/* set promiscuity level to new slave */
1262	if (dev->flags & IFF_PROMISC) {
1263		err = dev_set_promiscuity(port_dev, 1);
1264		if (err)
1265			goto err_set_slave_promisc;
1266	}
1267
1268	/* set allmulti level to new slave */
1269	if (dev->flags & IFF_ALLMULTI) {
1270		err = dev_set_allmulti(port_dev, 1);
1271		if (err) {
1272			if (dev->flags & IFF_PROMISC)
1273				dev_set_promiscuity(port_dev, -1);
1274			goto err_set_slave_promisc;
1275		}
1276	}
1277
1278	if (dev->flags & IFF_UP) {
1279		netif_addr_lock_bh(dev);
1280		dev_uc_sync_multiple(port_dev, dev);
1281		dev_mc_sync_multiple(port_dev, dev);
1282		netif_addr_unlock_bh(dev);
1283	}
1284
1285	port->index = -1;
1286	list_add_tail_rcu(&port->list, &team->port_list);
1287	team_port_enable(team, port);
1288	__team_compute_features(team);
1289	__team_port_change_port_added(port, !!netif_oper_up(port_dev));
1290	__team_options_change_check(team);
1291
1292	netdev_info(dev, "Port device %s added\n", portname);
1293
1294	return 0;
1295
1296err_set_slave_promisc:
1297	__team_option_inst_del_port(team, port);
1298
1299err_option_port_add:
1300	team_upper_dev_unlink(team, port);
1301
1302err_set_upper_link:
1303	netdev_rx_handler_unregister(port_dev);
1304
1305err_handler_register:
 
 
 
1306	team_port_disable_netpoll(port);
1307
1308err_enable_netpoll:
1309	vlan_vids_del_by_dev(port_dev, dev);
1310
1311err_vids_add:
1312	dev_close(port_dev);
1313
1314err_dev_open:
1315	team_port_leave(team, port);
1316	team_port_set_orig_dev_addr(port);
1317
1318err_port_enter:
1319	dev_set_mtu(port_dev, port->orig.mtu);
1320
1321err_set_mtu:
1322	kfree(port);
1323
1324	return err;
1325}
1326
1327static void __team_port_change_port_removed(struct team_port *port);
1328
1329static int team_port_del(struct team *team, struct net_device *port_dev)
1330{
1331	struct net_device *dev = team->dev;
1332	struct team_port *port;
1333	char *portname = port_dev->name;
1334
1335	port = team_port_get_rtnl(port_dev);
1336	if (!port || !team_port_find(team, port)) {
1337		netdev_err(dev, "Device %s does not act as a port of this team\n",
1338			   portname);
1339		return -ENOENT;
1340	}
1341
1342	team_port_disable(team, port);
1343	list_del_rcu(&port->list);
1344
1345	if (dev->flags & IFF_PROMISC)
1346		dev_set_promiscuity(port_dev, -1);
1347	if (dev->flags & IFF_ALLMULTI)
1348		dev_set_allmulti(port_dev, -1);
1349
1350	team_upper_dev_unlink(team, port);
1351	netdev_rx_handler_unregister(port_dev);
 
1352	team_port_disable_netpoll(port);
1353	vlan_vids_del_by_dev(port_dev, dev);
1354	if (dev->flags & IFF_UP) {
1355		dev_uc_unsync(port_dev, dev);
1356		dev_mc_unsync(port_dev, dev);
1357	}
1358	dev_close(port_dev);
1359	team_port_leave(team, port);
1360
1361	__team_option_inst_mark_removed_port(team, port);
1362	__team_options_change_check(team);
1363	__team_option_inst_del_port(team, port);
1364	__team_port_change_port_removed(port);
1365
1366	team_port_set_orig_dev_addr(port);
1367	dev_set_mtu(port_dev, port->orig.mtu);
1368	kfree_rcu(port, rcu);
1369	netdev_info(dev, "Port device %s removed\n", portname);
1370	__team_compute_features(team);
1371
1372	return 0;
1373}
1374
1375
1376/*****************
1377 * Net device ops
1378 *****************/
1379
1380static void team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1381{
1382	ctx->data.str_val = team->mode->kind;
 
1383}
1384
1385static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1386{
1387	return team_change_mode(team, ctx->data.str_val);
1388}
1389
1390static void team_notify_peers_count_get(struct team *team,
1391					struct team_gsetter_ctx *ctx)
1392{
1393	ctx->data.u32_val = team->notify_peers.count;
 
1394}
1395
1396static int team_notify_peers_count_set(struct team *team,
1397				       struct team_gsetter_ctx *ctx)
1398{
1399	team->notify_peers.count = ctx->data.u32_val;
1400	return 0;
1401}
1402
1403static void team_notify_peers_interval_get(struct team *team,
1404					   struct team_gsetter_ctx *ctx)
1405{
1406	ctx->data.u32_val = team->notify_peers.interval;
 
1407}
1408
1409static int team_notify_peers_interval_set(struct team *team,
1410					  struct team_gsetter_ctx *ctx)
1411{
1412	team->notify_peers.interval = ctx->data.u32_val;
1413	return 0;
1414}
1415
1416static void team_mcast_rejoin_count_get(struct team *team,
1417					struct team_gsetter_ctx *ctx)
1418{
1419	ctx->data.u32_val = team->mcast_rejoin.count;
 
1420}
1421
1422static int team_mcast_rejoin_count_set(struct team *team,
1423				       struct team_gsetter_ctx *ctx)
1424{
1425	team->mcast_rejoin.count = ctx->data.u32_val;
1426	return 0;
1427}
1428
1429static void team_mcast_rejoin_interval_get(struct team *team,
1430					   struct team_gsetter_ctx *ctx)
1431{
1432	ctx->data.u32_val = team->mcast_rejoin.interval;
 
1433}
1434
1435static int team_mcast_rejoin_interval_set(struct team *team,
1436					  struct team_gsetter_ctx *ctx)
1437{
1438	team->mcast_rejoin.interval = ctx->data.u32_val;
1439	return 0;
1440}
1441
1442static void team_port_en_option_get(struct team *team,
1443				    struct team_gsetter_ctx *ctx)
1444{
1445	struct team_port *port = ctx->info->port;
1446
1447	ctx->data.bool_val = team_port_enabled(port);
 
1448}
1449
1450static int team_port_en_option_set(struct team *team,
1451				   struct team_gsetter_ctx *ctx)
1452{
1453	struct team_port *port = ctx->info->port;
1454
1455	if (ctx->data.bool_val)
1456		team_port_enable(team, port);
1457	else
1458		team_port_disable(team, port);
1459	return 0;
1460}
1461
1462static void team_user_linkup_option_get(struct team *team,
1463					struct team_gsetter_ctx *ctx)
1464{
1465	struct team_port *port = ctx->info->port;
1466
1467	ctx->data.bool_val = port->user.linkup;
 
1468}
1469
1470static void __team_carrier_check(struct team *team);
1471
1472static int team_user_linkup_option_set(struct team *team,
1473				       struct team_gsetter_ctx *ctx)
1474{
1475	struct team_port *port = ctx->info->port;
1476
1477	port->user.linkup = ctx->data.bool_val;
1478	team_refresh_port_linkup(port);
1479	__team_carrier_check(port->team);
1480	return 0;
1481}
1482
1483static void team_user_linkup_en_option_get(struct team *team,
1484					   struct team_gsetter_ctx *ctx)
1485{
1486	struct team_port *port = ctx->info->port;
1487
1488	ctx->data.bool_val = port->user.linkup_enabled;
 
1489}
1490
1491static int team_user_linkup_en_option_set(struct team *team,
1492					  struct team_gsetter_ctx *ctx)
1493{
1494	struct team_port *port = ctx->info->port;
1495
1496	port->user.linkup_enabled = ctx->data.bool_val;
1497	team_refresh_port_linkup(port);
1498	__team_carrier_check(port->team);
1499	return 0;
1500}
1501
1502static void team_priority_option_get(struct team *team,
1503				     struct team_gsetter_ctx *ctx)
1504{
1505	struct team_port *port = ctx->info->port;
1506
1507	ctx->data.s32_val = port->priority;
 
1508}
1509
1510static int team_priority_option_set(struct team *team,
1511				    struct team_gsetter_ctx *ctx)
1512{
1513	struct team_port *port = ctx->info->port;
1514	s32 priority = ctx->data.s32_val;
1515
1516	if (port->priority == priority)
1517		return 0;
1518	port->priority = priority;
1519	team_queue_override_port_prio_changed(team, port);
1520	return 0;
1521}
1522
1523static void team_queue_id_option_get(struct team *team,
1524				     struct team_gsetter_ctx *ctx)
1525{
1526	struct team_port *port = ctx->info->port;
1527
1528	ctx->data.u32_val = port->queue_id;
 
1529}
1530
1531static int team_queue_id_option_set(struct team *team,
1532				    struct team_gsetter_ctx *ctx)
1533{
1534	struct team_port *port = ctx->info->port;
1535	u16 new_queue_id = ctx->data.u32_val;
1536
1537	if (port->queue_id == new_queue_id)
1538		return 0;
1539	if (new_queue_id >= team->dev->real_num_tx_queues)
1540		return -EINVAL;
1541	team_queue_override_port_change_queue_id(team, port, new_queue_id);
1542	return 0;
1543}
1544
1545static const struct team_option team_options[] = {
1546	{
1547		.name = "mode",
1548		.type = TEAM_OPTION_TYPE_STRING,
1549		.getter = team_mode_option_get,
1550		.setter = team_mode_option_set,
1551	},
1552	{
1553		.name = "notify_peers_count",
1554		.type = TEAM_OPTION_TYPE_U32,
1555		.getter = team_notify_peers_count_get,
1556		.setter = team_notify_peers_count_set,
1557	},
1558	{
1559		.name = "notify_peers_interval",
1560		.type = TEAM_OPTION_TYPE_U32,
1561		.getter = team_notify_peers_interval_get,
1562		.setter = team_notify_peers_interval_set,
1563	},
1564	{
1565		.name = "mcast_rejoin_count",
1566		.type = TEAM_OPTION_TYPE_U32,
1567		.getter = team_mcast_rejoin_count_get,
1568		.setter = team_mcast_rejoin_count_set,
1569	},
1570	{
1571		.name = "mcast_rejoin_interval",
1572		.type = TEAM_OPTION_TYPE_U32,
1573		.getter = team_mcast_rejoin_interval_get,
1574		.setter = team_mcast_rejoin_interval_set,
1575	},
1576	{
1577		.name = "enabled",
1578		.type = TEAM_OPTION_TYPE_BOOL,
1579		.per_port = true,
1580		.getter = team_port_en_option_get,
1581		.setter = team_port_en_option_set,
1582	},
1583	{
1584		.name = "user_linkup",
1585		.type = TEAM_OPTION_TYPE_BOOL,
1586		.per_port = true,
1587		.getter = team_user_linkup_option_get,
1588		.setter = team_user_linkup_option_set,
1589	},
1590	{
1591		.name = "user_linkup_enabled",
1592		.type = TEAM_OPTION_TYPE_BOOL,
1593		.per_port = true,
1594		.getter = team_user_linkup_en_option_get,
1595		.setter = team_user_linkup_en_option_set,
1596	},
1597	{
1598		.name = "priority",
1599		.type = TEAM_OPTION_TYPE_S32,
1600		.per_port = true,
1601		.getter = team_priority_option_get,
1602		.setter = team_priority_option_set,
1603	},
1604	{
1605		.name = "queue_id",
1606		.type = TEAM_OPTION_TYPE_U32,
1607		.per_port = true,
1608		.getter = team_queue_id_option_get,
1609		.setter = team_queue_id_option_set,
1610	},
1611};
1612
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1613
1614static int team_init(struct net_device *dev)
1615{
1616	struct team *team = netdev_priv(dev);
1617	int i;
1618	int err;
1619
1620	team->dev = dev;
 
1621	team_set_no_mode(team);
1622	team->notifier_ctx = false;
1623
1624	team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1625	if (!team->pcpu_stats)
1626		return -ENOMEM;
1627
1628	for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1629		INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1630	INIT_LIST_HEAD(&team->port_list);
1631	err = team_queue_override_init(team);
1632	if (err)
1633		goto err_team_queue_override_init;
1634
1635	team_adjust_ops(team);
1636
1637	INIT_LIST_HEAD(&team->option_list);
1638	INIT_LIST_HEAD(&team->option_inst_list);
1639
1640	team_notify_peers_init(team);
1641	team_mcast_rejoin_init(team);
1642
1643	err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1644	if (err)
1645		goto err_options_register;
1646	netif_carrier_off(dev);
1647
1648	lockdep_register_key(&team->team_lock_key);
1649	__mutex_init(&team->lock, "team->team_lock_key", &team->team_lock_key);
1650	netdev_lockdep_set_classes(dev);
1651
1652	return 0;
1653
1654err_options_register:
1655	team_mcast_rejoin_fini(team);
1656	team_notify_peers_fini(team);
1657	team_queue_override_fini(team);
1658err_team_queue_override_init:
1659	free_percpu(team->pcpu_stats);
1660
1661	return err;
1662}
1663
1664static void team_uninit(struct net_device *dev)
1665{
1666	struct team *team = netdev_priv(dev);
1667	struct team_port *port;
1668	struct team_port *tmp;
1669
1670	mutex_lock(&team->lock);
1671	list_for_each_entry_safe(port, tmp, &team->port_list, list)
1672		team_port_del(team, port->dev);
1673
1674	__team_change_mode(team, NULL); /* cleanup */
1675	__team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1676	team_mcast_rejoin_fini(team);
1677	team_notify_peers_fini(team);
1678	team_queue_override_fini(team);
1679	mutex_unlock(&team->lock);
1680	netdev_change_features(dev);
1681	lockdep_unregister_key(&team->team_lock_key);
1682}
1683
1684static void team_destructor(struct net_device *dev)
1685{
1686	struct team *team = netdev_priv(dev);
1687
1688	free_percpu(team->pcpu_stats);
 
1689}
1690
1691static int team_open(struct net_device *dev)
1692{
1693	return 0;
1694}
1695
1696static int team_close(struct net_device *dev)
1697{
1698	struct team *team = netdev_priv(dev);
1699	struct team_port *port;
1700
1701	list_for_each_entry(port, &team->port_list, list) {
1702		dev_uc_unsync(port->dev, dev);
1703		dev_mc_unsync(port->dev, dev);
1704	}
1705
1706	return 0;
1707}
1708
1709/*
1710 * note: already called with rcu_read_lock
1711 */
1712static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1713{
1714	struct team *team = netdev_priv(dev);
1715	bool tx_success;
1716	unsigned int len = skb->len;
1717
1718	tx_success = team_queue_override_transmit(team, skb);
1719	if (!tx_success)
1720		tx_success = team->ops.transmit(team, skb);
1721	if (tx_success) {
1722		struct team_pcpu_stats *pcpu_stats;
1723
1724		pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1725		u64_stats_update_begin(&pcpu_stats->syncp);
1726		u64_stats_inc(&pcpu_stats->tx_packets);
1727		u64_stats_add(&pcpu_stats->tx_bytes, len);
1728		u64_stats_update_end(&pcpu_stats->syncp);
1729	} else {
1730		this_cpu_inc(team->pcpu_stats->tx_dropped);
1731	}
1732
1733	return NETDEV_TX_OK;
1734}
1735
1736static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1737			     struct net_device *sb_dev)
1738{
1739	/*
1740	 * This helper function exists to help dev_pick_tx get the correct
1741	 * destination queue.  Using a helper function skips a call to
1742	 * skb_tx_hash and will put the skbs in the queue we expect on their
1743	 * way down to the team driver.
1744	 */
1745	u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1746
1747	/*
1748	 * Save the original txq to restore before passing to the driver
1749	 */
1750	qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1751
1752	if (unlikely(txq >= dev->real_num_tx_queues)) {
1753		do {
1754			txq -= dev->real_num_tx_queues;
1755		} while (txq >= dev->real_num_tx_queues);
1756	}
1757	return txq;
1758}
1759
1760static void team_change_rx_flags(struct net_device *dev, int change)
1761{
1762	struct team *team = netdev_priv(dev);
1763	struct team_port *port;
1764	int inc;
1765
1766	rcu_read_lock();
1767	list_for_each_entry_rcu(port, &team->port_list, list) {
1768		if (change & IFF_PROMISC) {
1769			inc = dev->flags & IFF_PROMISC ? 1 : -1;
1770			dev_set_promiscuity(port->dev, inc);
1771		}
1772		if (change & IFF_ALLMULTI) {
1773			inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1774			dev_set_allmulti(port->dev, inc);
1775		}
1776	}
1777	rcu_read_unlock();
1778}
1779
1780static void team_set_rx_mode(struct net_device *dev)
1781{
1782	struct team *team = netdev_priv(dev);
1783	struct team_port *port;
1784
1785	rcu_read_lock();
1786	list_for_each_entry_rcu(port, &team->port_list, list) {
1787		dev_uc_sync_multiple(port->dev, dev);
1788		dev_mc_sync_multiple(port->dev, dev);
1789	}
1790	rcu_read_unlock();
1791}
1792
1793static int team_set_mac_address(struct net_device *dev, void *p)
1794{
1795	struct sockaddr *addr = p;
1796	struct team *team = netdev_priv(dev);
1797	struct team_port *port;
1798
1799	if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1800		return -EADDRNOTAVAIL;
1801	dev_addr_set(dev, addr->sa_data);
1802	mutex_lock(&team->lock);
1803	list_for_each_entry(port, &team->port_list, list)
1804		if (team->ops.port_change_dev_addr)
1805			team->ops.port_change_dev_addr(team, port);
1806	mutex_unlock(&team->lock);
1807	return 0;
1808}
1809
1810static int team_change_mtu(struct net_device *dev, int new_mtu)
1811{
1812	struct team *team = netdev_priv(dev);
1813	struct team_port *port;
1814	int err;
1815
1816	/*
1817	 * Alhough this is reader, it's guarded by team lock. It's not possible
1818	 * to traverse list in reverse under rcu_read_lock
1819	 */
1820	mutex_lock(&team->lock);
1821	team->port_mtu_change_allowed = true;
1822	list_for_each_entry(port, &team->port_list, list) {
1823		err = dev_set_mtu(port->dev, new_mtu);
1824		if (err) {
1825			netdev_err(dev, "Device %s failed to change mtu",
1826				   port->dev->name);
1827			goto unwind;
1828		}
1829	}
1830	team->port_mtu_change_allowed = false;
1831	mutex_unlock(&team->lock);
1832
1833	dev->mtu = new_mtu;
1834
1835	return 0;
1836
1837unwind:
1838	list_for_each_entry_continue_reverse(port, &team->port_list, list)
1839		dev_set_mtu(port->dev, dev->mtu);
1840	team->port_mtu_change_allowed = false;
1841	mutex_unlock(&team->lock);
1842
1843	return err;
1844}
1845
1846static void
1847team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1848{
1849	struct team *team = netdev_priv(dev);
1850	struct team_pcpu_stats *p;
1851	u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1852	u32 rx_dropped = 0, tx_dropped = 0, rx_nohandler = 0;
1853	unsigned int start;
1854	int i;
1855
1856	for_each_possible_cpu(i) {
1857		p = per_cpu_ptr(team->pcpu_stats, i);
1858		do {
1859			start = u64_stats_fetch_begin(&p->syncp);
1860			rx_packets	= u64_stats_read(&p->rx_packets);
1861			rx_bytes	= u64_stats_read(&p->rx_bytes);
1862			rx_multicast	= u64_stats_read(&p->rx_multicast);
1863			tx_packets	= u64_stats_read(&p->tx_packets);
1864			tx_bytes	= u64_stats_read(&p->tx_bytes);
1865		} while (u64_stats_fetch_retry(&p->syncp, start));
1866
1867		stats->rx_packets	+= rx_packets;
1868		stats->rx_bytes		+= rx_bytes;
1869		stats->multicast	+= rx_multicast;
1870		stats->tx_packets	+= tx_packets;
1871		stats->tx_bytes		+= tx_bytes;
1872		/*
1873		 * rx_dropped, tx_dropped & rx_nohandler are u32,
1874		 * updated without syncp protection.
1875		 */
1876		rx_dropped	+= READ_ONCE(p->rx_dropped);
1877		tx_dropped	+= READ_ONCE(p->tx_dropped);
1878		rx_nohandler	+= READ_ONCE(p->rx_nohandler);
1879	}
1880	stats->rx_dropped	= rx_dropped;
1881	stats->tx_dropped	= tx_dropped;
1882	stats->rx_nohandler	= rx_nohandler;
1883}
1884
1885static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1886{
1887	struct team *team = netdev_priv(dev);
1888	struct team_port *port;
1889	int err;
1890
1891	/*
1892	 * Alhough this is reader, it's guarded by team lock. It's not possible
1893	 * to traverse list in reverse under rcu_read_lock
1894	 */
1895	mutex_lock(&team->lock);
1896	list_for_each_entry(port, &team->port_list, list) {
1897		err = vlan_vid_add(port->dev, proto, vid);
1898		if (err)
1899			goto unwind;
1900	}
1901	mutex_unlock(&team->lock);
1902
1903	return 0;
1904
1905unwind:
1906	list_for_each_entry_continue_reverse(port, &team->port_list, list)
1907		vlan_vid_del(port->dev, proto, vid);
1908	mutex_unlock(&team->lock);
1909
1910	return err;
1911}
1912
1913static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1914{
1915	struct team *team = netdev_priv(dev);
1916	struct team_port *port;
1917
1918	mutex_lock(&team->lock);
1919	list_for_each_entry(port, &team->port_list, list)
1920		vlan_vid_del(port->dev, proto, vid);
1921	mutex_unlock(&team->lock);
1922
1923	return 0;
1924}
1925
1926#ifdef CONFIG_NET_POLL_CONTROLLER
1927static void team_poll_controller(struct net_device *dev)
1928{
1929}
1930
1931static void __team_netpoll_cleanup(struct team *team)
1932{
1933	struct team_port *port;
1934
1935	list_for_each_entry(port, &team->port_list, list)
1936		team_port_disable_netpoll(port);
1937}
1938
1939static void team_netpoll_cleanup(struct net_device *dev)
1940{
1941	struct team *team = netdev_priv(dev);
1942
1943	mutex_lock(&team->lock);
1944	__team_netpoll_cleanup(team);
1945	mutex_unlock(&team->lock);
1946}
1947
1948static int team_netpoll_setup(struct net_device *dev,
1949			      struct netpoll_info *npifo)
1950{
1951	struct team *team = netdev_priv(dev);
1952	struct team_port *port;
1953	int err = 0;
1954
1955	mutex_lock(&team->lock);
1956	list_for_each_entry(port, &team->port_list, list) {
1957		err = __team_port_enable_netpoll(port);
1958		if (err) {
1959			__team_netpoll_cleanup(team);
1960			break;
1961		}
1962	}
1963	mutex_unlock(&team->lock);
1964	return err;
1965}
1966#endif
1967
1968static int team_add_slave(struct net_device *dev, struct net_device *port_dev,
1969			  struct netlink_ext_ack *extack)
1970{
1971	struct team *team = netdev_priv(dev);
1972	int err;
1973
1974	mutex_lock(&team->lock);
1975	err = team_port_add(team, port_dev, extack);
1976	mutex_unlock(&team->lock);
1977
1978	if (!err)
1979		netdev_change_features(dev);
1980
1981	return err;
1982}
1983
1984static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1985{
1986	struct team *team = netdev_priv(dev);
1987	int err;
1988
1989	mutex_lock(&team->lock);
1990	err = team_port_del(team, port_dev);
1991	mutex_unlock(&team->lock);
1992
1993	if (err)
1994		return err;
1995
1996	if (netif_is_team_master(port_dev)) {
1997		lockdep_unregister_key(&team->team_lock_key);
1998		lockdep_register_key(&team->team_lock_key);
1999		lockdep_set_class(&team->lock, &team->team_lock_key);
2000	}
2001	netdev_change_features(dev);
2002
2003	return err;
2004}
2005
2006static netdev_features_t team_fix_features(struct net_device *dev,
2007					   netdev_features_t features)
2008{
2009	struct team_port *port;
2010	struct team *team = netdev_priv(dev);
2011	netdev_features_t mask;
2012
2013	mask = features;
2014	features &= ~NETIF_F_ONE_FOR_ALL;
2015	features |= NETIF_F_ALL_FOR_ALL;
2016
2017	rcu_read_lock();
2018	list_for_each_entry_rcu(port, &team->port_list, list) {
2019		features = netdev_increment_features(features,
2020						     port->dev->features,
2021						     mask);
2022	}
2023	rcu_read_unlock();
2024
2025	features = netdev_add_tso_features(features, mask);
2026
2027	return features;
2028}
2029
2030static int team_change_carrier(struct net_device *dev, bool new_carrier)
2031{
2032	struct team *team = netdev_priv(dev);
2033
2034	team->user_carrier_enabled = true;
2035
2036	if (new_carrier)
2037		netif_carrier_on(dev);
2038	else
2039		netif_carrier_off(dev);
2040	return 0;
2041}
2042
2043static const struct net_device_ops team_netdev_ops = {
2044	.ndo_init		= team_init,
2045	.ndo_uninit		= team_uninit,
2046	.ndo_open		= team_open,
2047	.ndo_stop		= team_close,
2048	.ndo_start_xmit		= team_xmit,
2049	.ndo_select_queue	= team_select_queue,
2050	.ndo_change_rx_flags	= team_change_rx_flags,
2051	.ndo_set_rx_mode	= team_set_rx_mode,
2052	.ndo_set_mac_address	= team_set_mac_address,
2053	.ndo_change_mtu		= team_change_mtu,
2054	.ndo_get_stats64	= team_get_stats64,
2055	.ndo_vlan_rx_add_vid	= team_vlan_rx_add_vid,
2056	.ndo_vlan_rx_kill_vid	= team_vlan_rx_kill_vid,
2057#ifdef CONFIG_NET_POLL_CONTROLLER
2058	.ndo_poll_controller	= team_poll_controller,
2059	.ndo_netpoll_setup	= team_netpoll_setup,
2060	.ndo_netpoll_cleanup	= team_netpoll_cleanup,
2061#endif
2062	.ndo_add_slave		= team_add_slave,
2063	.ndo_del_slave		= team_del_slave,
2064	.ndo_fix_features	= team_fix_features,
2065	.ndo_change_carrier     = team_change_carrier,
2066	.ndo_features_check	= passthru_features_check,
2067};
2068
2069/***********************
2070 * ethtool interface
2071 ***********************/
2072
2073static void team_ethtool_get_drvinfo(struct net_device *dev,
2074				     struct ethtool_drvinfo *drvinfo)
2075{
2076	strscpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
2077	strscpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2078}
2079
2080static int team_ethtool_get_link_ksettings(struct net_device *dev,
2081					   struct ethtool_link_ksettings *cmd)
2082{
2083	struct team *team= netdev_priv(dev);
2084	unsigned long speed = 0;
2085	struct team_port *port;
2086
2087	cmd->base.duplex = DUPLEX_UNKNOWN;
2088	cmd->base.port = PORT_OTHER;
2089
2090	rcu_read_lock();
2091	list_for_each_entry_rcu(port, &team->port_list, list) {
2092		if (team_port_txable(port)) {
2093			if (port->state.speed != SPEED_UNKNOWN)
2094				speed += port->state.speed;
2095			if (cmd->base.duplex == DUPLEX_UNKNOWN &&
2096			    port->state.duplex != DUPLEX_UNKNOWN)
2097				cmd->base.duplex = port->state.duplex;
2098		}
2099	}
2100	rcu_read_unlock();
2101
2102	cmd->base.speed = speed ? : SPEED_UNKNOWN;
2103
2104	return 0;
2105}
2106
2107static const struct ethtool_ops team_ethtool_ops = {
2108	.get_drvinfo		= team_ethtool_get_drvinfo,
2109	.get_link		= ethtool_op_get_link,
2110	.get_link_ksettings	= team_ethtool_get_link_ksettings,
2111};
2112
2113/***********************
2114 * rt netlink interface
2115 ***********************/
2116
2117static void team_setup_by_port(struct net_device *dev,
2118			       struct net_device *port_dev)
2119{
2120	struct team *team = netdev_priv(dev);
2121
2122	if (port_dev->type == ARPHRD_ETHER)
2123		dev->header_ops	= team->header_ops_cache;
2124	else
2125		dev->header_ops	= port_dev->header_ops;
2126	dev->type = port_dev->type;
2127	dev->hard_header_len = port_dev->hard_header_len;
2128	dev->needed_headroom = port_dev->needed_headroom;
2129	dev->addr_len = port_dev->addr_len;
2130	dev->mtu = port_dev->mtu;
2131	memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2132	eth_hw_addr_inherit(dev, port_dev);
2133
2134	if (port_dev->flags & IFF_POINTOPOINT) {
2135		dev->flags &= ~(IFF_BROADCAST | IFF_MULTICAST);
2136		dev->flags |= (IFF_POINTOPOINT | IFF_NOARP);
2137	} else if ((port_dev->flags & (IFF_BROADCAST | IFF_MULTICAST)) ==
2138		    (IFF_BROADCAST | IFF_MULTICAST)) {
2139		dev->flags |= (IFF_BROADCAST | IFF_MULTICAST);
2140		dev->flags &= ~(IFF_POINTOPOINT | IFF_NOARP);
2141	}
2142}
2143
2144static int team_dev_type_check_change(struct net_device *dev,
2145				      struct net_device *port_dev)
2146{
2147	struct team *team = netdev_priv(dev);
2148	char *portname = port_dev->name;
2149	int err;
2150
2151	if (dev->type == port_dev->type)
2152		return 0;
2153	if (!list_empty(&team->port_list)) {
2154		netdev_err(dev, "Device %s is of different type\n", portname);
2155		return -EBUSY;
2156	}
2157	err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2158	err = notifier_to_errno(err);
2159	if (err) {
2160		netdev_err(dev, "Refused to change device type\n");
2161		return err;
2162	}
2163	dev_uc_flush(dev);
2164	dev_mc_flush(dev);
2165	team_setup_by_port(dev, port_dev);
2166	call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2167	return 0;
2168}
2169
2170static void team_setup(struct net_device *dev)
2171{
2172	struct team *team = netdev_priv(dev);
2173
2174	ether_setup(dev);
2175	dev->max_mtu = ETH_MAX_MTU;
2176	team->header_ops_cache = dev->header_ops;
2177
2178	dev->netdev_ops = &team_netdev_ops;
2179	dev->ethtool_ops = &team_ethtool_ops;
2180	dev->needs_free_netdev = true;
2181	dev->priv_destructor = team_destructor;
 
2182	dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2183	dev->priv_flags |= IFF_NO_QUEUE;
2184	dev->priv_flags |= IFF_TEAM;
2185
2186	/*
2187	 * Indicate we support unicast address filtering. That way core won't
2188	 * bring us to promisc mode in case a unicast addr is added.
2189	 * Let this up to underlay drivers.
2190	 */
2191	dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2192
2193	dev->features |= NETIF_F_LLTX;
2194	dev->features |= NETIF_F_GRO;
2195
2196	/* Don't allow team devices to change network namespaces. */
2197	dev->features |= NETIF_F_NETNS_LOCAL;
2198
2199	dev->hw_features = TEAM_VLAN_FEATURES |
 
2200			   NETIF_F_HW_VLAN_CTAG_RX |
2201			   NETIF_F_HW_VLAN_CTAG_FILTER |
2202			   NETIF_F_HW_VLAN_STAG_RX |
2203			   NETIF_F_HW_VLAN_STAG_FILTER;
2204
2205	dev->hw_features |= NETIF_F_GSO_ENCAP_ALL;
2206	dev->features |= dev->hw_features;
2207	dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
2208}
2209
2210static int team_newlink(struct net *src_net, struct net_device *dev,
2211			struct nlattr *tb[], struct nlattr *data[],
2212			struct netlink_ext_ack *extack)
2213{
 
 
2214	if (tb[IFLA_ADDRESS] == NULL)
2215		eth_hw_addr_random(dev);
2216
2217	return register_netdevice(dev);
 
 
 
 
2218}
2219
2220static int team_validate(struct nlattr *tb[], struct nlattr *data[],
2221			 struct netlink_ext_ack *extack)
2222{
2223	if (tb[IFLA_ADDRESS]) {
2224		if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2225			return -EINVAL;
2226		if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2227			return -EADDRNOTAVAIL;
2228	}
2229	return 0;
2230}
2231
2232static unsigned int team_get_num_tx_queues(void)
2233{
2234	return TEAM_DEFAULT_NUM_TX_QUEUES;
2235}
2236
2237static unsigned int team_get_num_rx_queues(void)
2238{
2239	return TEAM_DEFAULT_NUM_RX_QUEUES;
2240}
2241
2242static struct rtnl_link_ops team_link_ops __read_mostly = {
2243	.kind			= DRV_NAME,
2244	.priv_size		= sizeof(struct team),
2245	.setup			= team_setup,
2246	.newlink		= team_newlink,
2247	.validate		= team_validate,
2248	.get_num_tx_queues	= team_get_num_tx_queues,
2249	.get_num_rx_queues	= team_get_num_rx_queues,
2250};
2251
2252
2253/***********************************
2254 * Generic netlink custom interface
2255 ***********************************/
2256
2257static struct genl_family team_nl_family;
 
 
 
 
 
 
2258
2259static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2260	[TEAM_ATTR_UNSPEC]			= { .type = NLA_UNSPEC, },
2261	[TEAM_ATTR_TEAM_IFINDEX]		= { .type = NLA_U32 },
2262	[TEAM_ATTR_LIST_OPTION]			= { .type = NLA_NESTED },
2263	[TEAM_ATTR_LIST_PORT]			= { .type = NLA_NESTED },
2264};
2265
2266static const struct nla_policy
2267team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2268	[TEAM_ATTR_OPTION_UNSPEC]		= { .type = NLA_UNSPEC, },
2269	[TEAM_ATTR_OPTION_NAME] = {
2270		.type = NLA_STRING,
2271		.len = TEAM_STRING_MAX_LEN,
2272	},
2273	[TEAM_ATTR_OPTION_CHANGED]		= { .type = NLA_FLAG },
2274	[TEAM_ATTR_OPTION_TYPE]			= { .type = NLA_U8 },
2275	[TEAM_ATTR_OPTION_DATA]			= { .type = NLA_BINARY },
2276	[TEAM_ATTR_OPTION_PORT_IFINDEX]		= { .type = NLA_U32 },
2277	[TEAM_ATTR_OPTION_ARRAY_INDEX]		= { .type = NLA_U32 },
2278};
2279
2280static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2281{
2282	struct sk_buff *msg;
2283	void *hdr;
2284	int err;
2285
2286	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2287	if (!msg)
2288		return -ENOMEM;
2289
2290	hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2291			  &team_nl_family, 0, TEAM_CMD_NOOP);
2292	if (!hdr) {
2293		err = -EMSGSIZE;
2294		goto err_msg_put;
2295	}
2296
2297	genlmsg_end(msg, hdr);
2298
2299	return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2300
2301err_msg_put:
2302	nlmsg_free(msg);
2303
2304	return err;
2305}
2306
2307/*
2308 * Netlink cmd functions should be locked by following two functions.
2309 * Since dev gets held here, that ensures dev won't disappear in between.
2310 */
2311static struct team *team_nl_team_get(struct genl_info *info)
2312{
2313	struct net *net = genl_info_net(info);
2314	int ifindex;
2315	struct net_device *dev;
2316	struct team *team;
2317
2318	if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2319		return NULL;
2320
2321	ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2322	dev = dev_get_by_index(net, ifindex);
2323	if (!dev || dev->netdev_ops != &team_netdev_ops) {
2324		dev_put(dev);
 
2325		return NULL;
2326	}
2327
2328	team = netdev_priv(dev);
2329	mutex_lock(&team->lock);
2330	return team;
2331}
2332
2333static void team_nl_team_put(struct team *team)
2334{
2335	mutex_unlock(&team->lock);
2336	dev_put(team->dev);
2337}
2338
2339typedef int team_nl_send_func_t(struct sk_buff *skb,
2340				struct team *team, u32 portid);
2341
2342static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2343{
2344	return genlmsg_unicast(dev_net(team->dev), skb, portid);
2345}
2346
2347static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2348				       struct team_option_inst *opt_inst)
2349{
2350	struct nlattr *option_item;
2351	struct team_option *option = opt_inst->option;
2352	struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2353	struct team_gsetter_ctx ctx;
2354	int err;
2355
2356	ctx.info = opt_inst_info;
2357	err = team_option_get(team, opt_inst, &ctx);
2358	if (err)
2359		return err;
2360
2361	option_item = nla_nest_start_noflag(skb, TEAM_ATTR_ITEM_OPTION);
2362	if (!option_item)
2363		return -EMSGSIZE;
2364
2365	if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2366		goto nest_cancel;
2367	if (opt_inst_info->port &&
2368	    nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2369			opt_inst_info->port->dev->ifindex))
2370		goto nest_cancel;
2371	if (opt_inst->option->array_size &&
2372	    nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2373			opt_inst_info->array_index))
2374		goto nest_cancel;
2375
2376	switch (option->type) {
2377	case TEAM_OPTION_TYPE_U32:
2378		if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2379			goto nest_cancel;
2380		if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2381			goto nest_cancel;
2382		break;
2383	case TEAM_OPTION_TYPE_STRING:
2384		if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2385			goto nest_cancel;
2386		if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2387				   ctx.data.str_val))
2388			goto nest_cancel;
2389		break;
2390	case TEAM_OPTION_TYPE_BINARY:
2391		if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2392			goto nest_cancel;
2393		if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2394			    ctx.data.bin_val.ptr))
2395			goto nest_cancel;
2396		break;
2397	case TEAM_OPTION_TYPE_BOOL:
2398		if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2399			goto nest_cancel;
2400		if (ctx.data.bool_val &&
2401		    nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2402			goto nest_cancel;
2403		break;
2404	case TEAM_OPTION_TYPE_S32:
2405		if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2406			goto nest_cancel;
2407		if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2408			goto nest_cancel;
2409		break;
2410	default:
2411		BUG();
2412	}
2413	if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2414		goto nest_cancel;
2415	if (opt_inst->changed) {
2416		if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2417			goto nest_cancel;
2418		opt_inst->changed = false;
2419	}
2420	nla_nest_end(skb, option_item);
2421	return 0;
2422
2423nest_cancel:
2424	nla_nest_cancel(skb, option_item);
2425	return -EMSGSIZE;
2426}
2427
2428static int __send_and_alloc_skb(struct sk_buff **pskb,
2429				struct team *team, u32 portid,
2430				team_nl_send_func_t *send_func)
2431{
2432	int err;
2433
2434	if (*pskb) {
2435		err = send_func(*pskb, team, portid);
2436		if (err)
2437			return err;
2438	}
2439	*pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2440	if (!*pskb)
2441		return -ENOMEM;
2442	return 0;
2443}
2444
2445static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2446				    int flags, team_nl_send_func_t *send_func,
2447				    struct list_head *sel_opt_inst_list)
2448{
2449	struct nlattr *option_list;
2450	struct nlmsghdr *nlh;
2451	void *hdr;
2452	struct team_option_inst *opt_inst;
2453	int err;
2454	struct sk_buff *skb = NULL;
2455	bool incomplete;
2456	int i;
2457
2458	opt_inst = list_first_entry(sel_opt_inst_list,
2459				    struct team_option_inst, tmp_list);
2460
2461start_again:
2462	err = __send_and_alloc_skb(&skb, team, portid, send_func);
2463	if (err)
2464		return err;
2465
2466	hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2467			  TEAM_CMD_OPTIONS_GET);
2468	if (!hdr) {
2469		nlmsg_free(skb);
2470		return -EMSGSIZE;
2471	}
2472
2473	if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2474		goto nla_put_failure;
2475	option_list = nla_nest_start_noflag(skb, TEAM_ATTR_LIST_OPTION);
2476	if (!option_list)
2477		goto nla_put_failure;
2478
2479	i = 0;
2480	incomplete = false;
2481	list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2482		err = team_nl_fill_one_option_get(skb, team, opt_inst);
2483		if (err) {
2484			if (err == -EMSGSIZE) {
2485				if (!i)
2486					goto errout;
2487				incomplete = true;
2488				break;
2489			}
2490			goto errout;
2491		}
2492		i++;
2493	}
2494
2495	nla_nest_end(skb, option_list);
2496	genlmsg_end(skb, hdr);
2497	if (incomplete)
2498		goto start_again;
2499
2500send_done:
2501	nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2502	if (!nlh) {
2503		err = __send_and_alloc_skb(&skb, team, portid, send_func);
2504		if (err)
2505			return err;
2506		goto send_done;
2507	}
2508
2509	return send_func(skb, team, portid);
2510
2511nla_put_failure:
2512	err = -EMSGSIZE;
2513errout:
 
2514	nlmsg_free(skb);
2515	return err;
2516}
2517
2518static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2519{
2520	struct team *team;
2521	struct team_option_inst *opt_inst;
2522	int err;
2523	LIST_HEAD(sel_opt_inst_list);
2524
2525	team = team_nl_team_get(info);
2526	if (!team)
2527		return -EINVAL;
2528
2529	list_for_each_entry(opt_inst, &team->option_inst_list, list)
2530		list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2531	err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2532				       NLM_F_ACK, team_nl_send_unicast,
2533				       &sel_opt_inst_list);
2534
2535	team_nl_team_put(team);
2536
2537	return err;
2538}
2539
2540static int team_nl_send_event_options_get(struct team *team,
2541					  struct list_head *sel_opt_inst_list);
2542
2543static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2544{
2545	struct team *team;
2546	int err = 0;
2547	int i;
2548	struct nlattr *nl_option;
2549
2550	rtnl_lock();
2551
2552	team = team_nl_team_get(info);
2553	if (!team) {
2554		err = -EINVAL;
2555		goto rtnl_unlock;
2556	}
2557
2558	err = -EINVAL;
2559	if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2560		err = -EINVAL;
2561		goto team_put;
2562	}
2563
2564	nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2565		struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2566		struct nlattr *attr;
2567		struct nlattr *attr_data;
2568		LIST_HEAD(opt_inst_list);
2569		enum team_option_type opt_type;
2570		int opt_port_ifindex = 0; /* != 0 for per-port options */
2571		u32 opt_array_index = 0;
2572		bool opt_is_array = false;
2573		struct team_option_inst *opt_inst;
2574		char *opt_name;
2575		bool opt_found = false;
2576
2577		if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2578			err = -EINVAL;
2579			goto team_put;
2580		}
2581		err = nla_parse_nested_deprecated(opt_attrs,
2582						  TEAM_ATTR_OPTION_MAX,
2583						  nl_option,
2584						  team_nl_option_policy,
2585						  info->extack);
2586		if (err)
2587			goto team_put;
2588		if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2589		    !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2590			err = -EINVAL;
2591			goto team_put;
2592		}
2593		switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2594		case NLA_U32:
2595			opt_type = TEAM_OPTION_TYPE_U32;
2596			break;
2597		case NLA_STRING:
2598			opt_type = TEAM_OPTION_TYPE_STRING;
2599			break;
2600		case NLA_BINARY:
2601			opt_type = TEAM_OPTION_TYPE_BINARY;
2602			break;
2603		case NLA_FLAG:
2604			opt_type = TEAM_OPTION_TYPE_BOOL;
2605			break;
2606		case NLA_S32:
2607			opt_type = TEAM_OPTION_TYPE_S32;
2608			break;
2609		default:
2610			goto team_put;
2611		}
2612
2613		attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2614		if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2615			err = -EINVAL;
2616			goto team_put;
2617		}
2618
2619		opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2620		attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2621		if (attr)
2622			opt_port_ifindex = nla_get_u32(attr);
2623
2624		attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2625		if (attr) {
2626			opt_is_array = true;
2627			opt_array_index = nla_get_u32(attr);
2628		}
2629
2630		list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2631			struct team_option *option = opt_inst->option;
2632			struct team_gsetter_ctx ctx;
2633			struct team_option_inst_info *opt_inst_info;
2634			int tmp_ifindex;
2635
2636			opt_inst_info = &opt_inst->info;
2637			tmp_ifindex = opt_inst_info->port ?
2638				      opt_inst_info->port->dev->ifindex : 0;
2639			if (option->type != opt_type ||
2640			    strcmp(option->name, opt_name) ||
2641			    tmp_ifindex != opt_port_ifindex ||
2642			    (option->array_size && !opt_is_array) ||
2643			    opt_inst_info->array_index != opt_array_index)
2644				continue;
2645			opt_found = true;
2646			ctx.info = opt_inst_info;
2647			switch (opt_type) {
2648			case TEAM_OPTION_TYPE_U32:
2649				ctx.data.u32_val = nla_get_u32(attr_data);
2650				break;
2651			case TEAM_OPTION_TYPE_STRING:
2652				if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2653					err = -EINVAL;
2654					goto team_put;
2655				}
2656				ctx.data.str_val = nla_data(attr_data);
2657				break;
2658			case TEAM_OPTION_TYPE_BINARY:
2659				ctx.data.bin_val.len = nla_len(attr_data);
2660				ctx.data.bin_val.ptr = nla_data(attr_data);
2661				break;
2662			case TEAM_OPTION_TYPE_BOOL:
2663				ctx.data.bool_val = attr_data ? true : false;
2664				break;
2665			case TEAM_OPTION_TYPE_S32:
2666				ctx.data.s32_val = nla_get_s32(attr_data);
2667				break;
2668			default:
2669				BUG();
2670			}
2671			err = team_option_set(team, opt_inst, &ctx);
2672			if (err)
2673				goto team_put;
2674			opt_inst->changed = true;
2675			list_add(&opt_inst->tmp_list, &opt_inst_list);
2676		}
2677		if (!opt_found) {
2678			err = -ENOENT;
2679			goto team_put;
2680		}
2681
2682		err = team_nl_send_event_options_get(team, &opt_inst_list);
2683		if (err)
2684			break;
2685	}
2686
 
 
2687team_put:
2688	team_nl_team_put(team);
2689rtnl_unlock:
2690	rtnl_unlock();
2691	return err;
2692}
2693
2694static int team_nl_fill_one_port_get(struct sk_buff *skb,
2695				     struct team_port *port)
2696{
2697	struct nlattr *port_item;
2698
2699	port_item = nla_nest_start_noflag(skb, TEAM_ATTR_ITEM_PORT);
2700	if (!port_item)
2701		goto nest_cancel;
2702	if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2703		goto nest_cancel;
2704	if (port->changed) {
2705		if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2706			goto nest_cancel;
2707		port->changed = false;
2708	}
2709	if ((port->removed &&
2710	     nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2711	    (port->state.linkup &&
2712	     nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2713	    nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2714	    nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2715		goto nest_cancel;
2716	nla_nest_end(skb, port_item);
2717	return 0;
2718
2719nest_cancel:
2720	nla_nest_cancel(skb, port_item);
2721	return -EMSGSIZE;
2722}
2723
2724static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2725				      int flags, team_nl_send_func_t *send_func,
2726				      struct team_port *one_port)
2727{
2728	struct nlattr *port_list;
2729	struct nlmsghdr *nlh;
2730	void *hdr;
2731	struct team_port *port;
2732	int err;
2733	struct sk_buff *skb = NULL;
2734	bool incomplete;
2735	int i;
2736
2737	port = list_first_entry_or_null(&team->port_list,
2738					struct team_port, list);
2739
2740start_again:
2741	err = __send_and_alloc_skb(&skb, team, portid, send_func);
2742	if (err)
2743		return err;
2744
2745	hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2746			  TEAM_CMD_PORT_LIST_GET);
2747	if (!hdr) {
2748		nlmsg_free(skb);
2749		return -EMSGSIZE;
2750	}
2751
2752	if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2753		goto nla_put_failure;
2754	port_list = nla_nest_start_noflag(skb, TEAM_ATTR_LIST_PORT);
2755	if (!port_list)
2756		goto nla_put_failure;
2757
2758	i = 0;
2759	incomplete = false;
2760
2761	/* If one port is selected, called wants to send port list containing
2762	 * only this port. Otherwise go through all listed ports and send all
2763	 */
2764	if (one_port) {
2765		err = team_nl_fill_one_port_get(skb, one_port);
2766		if (err)
2767			goto errout;
2768	} else if (port) {
2769		list_for_each_entry_from(port, &team->port_list, list) {
2770			err = team_nl_fill_one_port_get(skb, port);
2771			if (err) {
2772				if (err == -EMSGSIZE) {
2773					if (!i)
2774						goto errout;
2775					incomplete = true;
2776					break;
2777				}
2778				goto errout;
2779			}
2780			i++;
2781		}
2782	}
2783
2784	nla_nest_end(skb, port_list);
2785	genlmsg_end(skb, hdr);
2786	if (incomplete)
2787		goto start_again;
2788
2789send_done:
2790	nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2791	if (!nlh) {
2792		err = __send_and_alloc_skb(&skb, team, portid, send_func);
2793		if (err)
2794			return err;
2795		goto send_done;
2796	}
2797
2798	return send_func(skb, team, portid);
2799
2800nla_put_failure:
2801	err = -EMSGSIZE;
2802errout:
 
2803	nlmsg_free(skb);
2804	return err;
2805}
2806
2807static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2808				     struct genl_info *info)
2809{
2810	struct team *team;
2811	int err;
2812
2813	team = team_nl_team_get(info);
2814	if (!team)
2815		return -EINVAL;
2816
2817	err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2818					 NLM_F_ACK, team_nl_send_unicast, NULL);
2819
2820	team_nl_team_put(team);
2821
2822	return err;
2823}
2824
2825static const struct genl_small_ops team_nl_ops[] = {
2826	{
2827		.cmd = TEAM_CMD_NOOP,
2828		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2829		.doit = team_nl_cmd_noop,
 
2830	},
2831	{
2832		.cmd = TEAM_CMD_OPTIONS_SET,
2833		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2834		.doit = team_nl_cmd_options_set,
 
2835		.flags = GENL_ADMIN_PERM,
2836	},
2837	{
2838		.cmd = TEAM_CMD_OPTIONS_GET,
2839		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2840		.doit = team_nl_cmd_options_get,
 
2841		.flags = GENL_ADMIN_PERM,
2842	},
2843	{
2844		.cmd = TEAM_CMD_PORT_LIST_GET,
2845		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2846		.doit = team_nl_cmd_port_list_get,
 
2847		.flags = GENL_ADMIN_PERM,
2848	},
2849};
2850
2851static const struct genl_multicast_group team_nl_mcgrps[] = {
2852	{ .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2853};
2854
2855static struct genl_family team_nl_family __ro_after_init = {
2856	.name		= TEAM_GENL_NAME,
2857	.version	= TEAM_GENL_VERSION,
2858	.maxattr	= TEAM_ATTR_MAX,
2859	.policy = team_nl_policy,
2860	.netnsok	= true,
2861	.module		= THIS_MODULE,
2862	.small_ops	= team_nl_ops,
2863	.n_small_ops	= ARRAY_SIZE(team_nl_ops),
2864	.resv_start_op	= TEAM_CMD_PORT_LIST_GET + 1,
2865	.mcgrps		= team_nl_mcgrps,
2866	.n_mcgrps	= ARRAY_SIZE(team_nl_mcgrps),
2867};
2868
2869static int team_nl_send_multicast(struct sk_buff *skb,
2870				  struct team *team, u32 portid)
2871{
2872	return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2873				       skb, 0, 0, GFP_KERNEL);
2874}
2875
2876static int team_nl_send_event_options_get(struct team *team,
2877					  struct list_head *sel_opt_inst_list)
2878{
2879	return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2880					sel_opt_inst_list);
2881}
2882
2883static int team_nl_send_event_port_get(struct team *team,
2884				       struct team_port *port)
2885{
2886	return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2887					  port);
2888}
2889
2890static int __init team_nl_init(void)
2891{
2892	return genl_register_family(&team_nl_family);
 
2893}
2894
2895static void __exit team_nl_fini(void)
2896{
2897	genl_unregister_family(&team_nl_family);
2898}
2899
2900
2901/******************
2902 * Change checkers
2903 ******************/
2904
2905static void __team_options_change_check(struct team *team)
2906{
2907	int err;
2908	struct team_option_inst *opt_inst;
2909	LIST_HEAD(sel_opt_inst_list);
2910
2911	list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2912		if (opt_inst->changed)
2913			list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2914	}
2915	err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2916	if (err && err != -ESRCH)
2917		netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2918			    err);
2919}
2920
2921/* rtnl lock is held */
2922
2923static void __team_port_change_send(struct team_port *port, bool linkup)
2924{
2925	int err;
2926
2927	port->changed = true;
2928	port->state.linkup = linkup;
2929	team_refresh_port_linkup(port);
2930	if (linkup) {
2931		struct ethtool_link_ksettings ecmd;
2932
2933		err = __ethtool_get_link_ksettings(port->dev, &ecmd);
2934		if (!err) {
2935			port->state.speed = ecmd.base.speed;
2936			port->state.duplex = ecmd.base.duplex;
2937			goto send_event;
2938		}
2939	}
2940	port->state.speed = 0;
2941	port->state.duplex = 0;
2942
2943send_event:
2944	err = team_nl_send_event_port_get(port->team, port);
2945	if (err && err != -ESRCH)
2946		netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2947			    port->dev->name, err);
2948
2949}
2950
2951static void __team_carrier_check(struct team *team)
2952{
2953	struct team_port *port;
2954	bool team_linkup;
2955
2956	if (team->user_carrier_enabled)
2957		return;
2958
2959	team_linkup = false;
2960	list_for_each_entry(port, &team->port_list, list) {
2961		if (port->linkup) {
2962			team_linkup = true;
2963			break;
2964		}
2965	}
2966
2967	if (team_linkup)
2968		netif_carrier_on(team->dev);
2969	else
2970		netif_carrier_off(team->dev);
2971}
2972
2973static void __team_port_change_check(struct team_port *port, bool linkup)
2974{
2975	if (port->state.linkup != linkup)
2976		__team_port_change_send(port, linkup);
2977	__team_carrier_check(port->team);
2978}
2979
2980static void __team_port_change_port_added(struct team_port *port, bool linkup)
2981{
2982	__team_port_change_send(port, linkup);
2983	__team_carrier_check(port->team);
2984}
2985
2986static void __team_port_change_port_removed(struct team_port *port)
2987{
2988	port->removed = true;
2989	__team_port_change_send(port, false);
2990	__team_carrier_check(port->team);
2991}
2992
2993static void team_port_change_check(struct team_port *port, bool linkup)
2994{
2995	struct team *team = port->team;
2996
2997	mutex_lock(&team->lock);
2998	__team_port_change_check(port, linkup);
2999	mutex_unlock(&team->lock);
3000}
3001
3002
3003/************************************
3004 * Net device notifier event handler
3005 ************************************/
3006
3007static int team_device_event(struct notifier_block *unused,
3008			     unsigned long event, void *ptr)
3009{
3010	struct net_device *dev = netdev_notifier_info_to_dev(ptr);
3011	struct team_port *port;
3012
3013	port = team_port_get_rtnl(dev);
3014	if (!port)
3015		return NOTIFY_DONE;
3016
3017	switch (event) {
3018	case NETDEV_UP:
3019		if (netif_oper_up(dev))
3020			team_port_change_check(port, true);
3021		break;
3022	case NETDEV_DOWN:
3023		team_port_change_check(port, false);
3024		break;
3025	case NETDEV_CHANGE:
3026		if (netif_running(port->dev))
3027			team_port_change_check(port,
3028					       !!netif_oper_up(port->dev));
3029		break;
3030	case NETDEV_UNREGISTER:
3031		team_del_slave(port->team->dev, dev);
3032		break;
3033	case NETDEV_FEAT_CHANGE:
3034		if (!port->team->notifier_ctx) {
3035			port->team->notifier_ctx = true;
3036			team_compute_features(port->team);
3037			port->team->notifier_ctx = false;
3038		}
3039		break;
3040	case NETDEV_PRECHANGEMTU:
3041		/* Forbid to change mtu of underlaying device */
3042		if (!port->team->port_mtu_change_allowed)
3043			return NOTIFY_BAD;
3044		break;
3045	case NETDEV_PRE_TYPE_CHANGE:
3046		/* Forbid to change type of underlaying device */
3047		return NOTIFY_BAD;
3048	case NETDEV_RESEND_IGMP:
3049		/* Propagate to master device */
3050		call_netdevice_notifiers(event, port->team->dev);
3051		break;
3052	}
3053	return NOTIFY_DONE;
3054}
3055
3056static struct notifier_block team_notifier_block __read_mostly = {
3057	.notifier_call = team_device_event,
3058};
3059
3060
3061/***********************
3062 * Module init and exit
3063 ***********************/
3064
3065static int __init team_module_init(void)
3066{
3067	int err;
3068
3069	register_netdevice_notifier(&team_notifier_block);
3070
3071	err = rtnl_link_register(&team_link_ops);
3072	if (err)
3073		goto err_rtnl_reg;
3074
3075	err = team_nl_init();
3076	if (err)
3077		goto err_nl_init;
3078
3079	return 0;
3080
3081err_nl_init:
3082	rtnl_link_unregister(&team_link_ops);
3083
3084err_rtnl_reg:
3085	unregister_netdevice_notifier(&team_notifier_block);
3086
3087	return err;
3088}
3089
3090static void __exit team_module_exit(void)
3091{
3092	team_nl_fini();
3093	rtnl_link_unregister(&team_link_ops);
3094	unregister_netdevice_notifier(&team_notifier_block);
3095}
3096
3097module_init(team_module_init);
3098module_exit(team_module_exit);
3099
3100MODULE_LICENSE("GPL v2");
3101MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
3102MODULE_DESCRIPTION("Ethernet team device driver");
3103MODULE_ALIAS_RTNL_LINK(DRV_NAME);