xref: /openbmc/linux/drivers/net/team/team.c (revision 5d0e4d78)
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 
44 static struct team_port *team_port_get_rcu(const struct net_device *dev)
45 {
46 	return rcu_dereference(dev->rx_handler_data);
47 }
48 
49 static 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  */
60 static int __set_port_dev_addr(struct net_device *port_dev,
61 			       const unsigned char *dev_addr)
62 {
63 	struct sockaddr addr;
64 
65 	memcpy(addr.sa_data, dev_addr, port_dev->addr_len);
66 	addr.sa_family = port_dev->type;
67 	return dev_set_mac_address(port_dev, &addr);
68 }
69 
70 static 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 
75 static 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 
81 int team_modeop_port_enter(struct team *team, struct team_port *port)
82 {
83 	return team_port_set_team_dev_addr(team, port);
84 }
85 EXPORT_SYMBOL(team_modeop_port_enter);
86 
87 void 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 }
92 EXPORT_SYMBOL(team_modeop_port_change_dev_addr);
93 
94 static 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 
103 static 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 
119 struct 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 
128 static 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 
140 static void __team_option_inst_del(struct team_option_inst *opt_inst)
141 {
142 	list_del(&opt_inst->list);
143 	kfree(opt_inst);
144 }
145 
146 static 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 
157 static 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 
189 static 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 
201 inst_del_option:
202 	__team_option_inst_del_option(team, option);
203 	return err;
204 }
205 
206 static 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 
219 static 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 
231 static 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 
246 inst_del_port:
247 	__team_option_inst_del_port(team, port);
248 	return err;
249 }
250 
251 static 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 
264 static int __team_options_register(struct team *team,
265 				   const struct team_option *option,
266 				   size_t option_count)
267 {
268 	int i;
269 	struct team_option **dst_opts;
270 	int err;
271 
272 	dst_opts = kzalloc(sizeof(struct team_option *) * option_count,
273 			   GFP_KERNEL);
274 	if (!dst_opts)
275 		return -ENOMEM;
276 	for (i = 0; i < option_count; i++, option++) {
277 		if (__team_find_option(team, option->name)) {
278 			err = -EEXIST;
279 			goto alloc_rollback;
280 		}
281 		dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
282 		if (!dst_opts[i]) {
283 			err = -ENOMEM;
284 			goto alloc_rollback;
285 		}
286 	}
287 
288 	for (i = 0; i < option_count; i++) {
289 		err = __team_option_inst_add_option(team, dst_opts[i]);
290 		if (err)
291 			goto inst_rollback;
292 		list_add_tail(&dst_opts[i]->list, &team->option_list);
293 	}
294 
295 	kfree(dst_opts);
296 	return 0;
297 
298 inst_rollback:
299 	for (i--; i >= 0; i--)
300 		__team_option_inst_del_option(team, dst_opts[i]);
301 
302 	i = option_count - 1;
303 alloc_rollback:
304 	for (i--; i >= 0; i--)
305 		kfree(dst_opts[i]);
306 
307 	kfree(dst_opts);
308 	return err;
309 }
310 
311 static void __team_options_mark_removed(struct team *team,
312 					const struct team_option *option,
313 					size_t option_count)
314 {
315 	int i;
316 
317 	for (i = 0; i < option_count; i++, option++) {
318 		struct team_option *del_opt;
319 
320 		del_opt = __team_find_option(team, option->name);
321 		if (del_opt)
322 			__team_option_inst_mark_removed_option(team, del_opt);
323 	}
324 }
325 
326 static void __team_options_unregister(struct team *team,
327 				      const struct team_option *option,
328 				      size_t option_count)
329 {
330 	int i;
331 
332 	for (i = 0; i < option_count; i++, option++) {
333 		struct team_option *del_opt;
334 
335 		del_opt = __team_find_option(team, option->name);
336 		if (del_opt) {
337 			__team_option_inst_del_option(team, del_opt);
338 			list_del(&del_opt->list);
339 			kfree(del_opt);
340 		}
341 	}
342 }
343 
344 static void __team_options_change_check(struct team *team);
345 
346 int team_options_register(struct team *team,
347 			  const struct team_option *option,
348 			  size_t option_count)
349 {
350 	int err;
351 
352 	err = __team_options_register(team, option, option_count);
353 	if (err)
354 		return err;
355 	__team_options_change_check(team);
356 	return 0;
357 }
358 EXPORT_SYMBOL(team_options_register);
359 
360 void team_options_unregister(struct team *team,
361 			     const struct team_option *option,
362 			     size_t option_count)
363 {
364 	__team_options_mark_removed(team, option, option_count);
365 	__team_options_change_check(team);
366 	__team_options_unregister(team, option, option_count);
367 }
368 EXPORT_SYMBOL(team_options_unregister);
369 
370 static int team_option_get(struct team *team,
371 			   struct team_option_inst *opt_inst,
372 			   struct team_gsetter_ctx *ctx)
373 {
374 	if (!opt_inst->option->getter)
375 		return -EOPNOTSUPP;
376 	return opt_inst->option->getter(team, ctx);
377 }
378 
379 static int team_option_set(struct team *team,
380 			   struct team_option_inst *opt_inst,
381 			   struct team_gsetter_ctx *ctx)
382 {
383 	if (!opt_inst->option->setter)
384 		return -EOPNOTSUPP;
385 	return opt_inst->option->setter(team, ctx);
386 }
387 
388 void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info)
389 {
390 	struct team_option_inst *opt_inst;
391 
392 	opt_inst = container_of(opt_inst_info, struct team_option_inst, info);
393 	opt_inst->changed = true;
394 }
395 EXPORT_SYMBOL(team_option_inst_set_change);
396 
397 void team_options_change_check(struct team *team)
398 {
399 	__team_options_change_check(team);
400 }
401 EXPORT_SYMBOL(team_options_change_check);
402 
403 
404 /****************
405  * Mode handling
406  ****************/
407 
408 static LIST_HEAD(mode_list);
409 static DEFINE_SPINLOCK(mode_list_lock);
410 
411 struct team_mode_item {
412 	struct list_head list;
413 	const struct team_mode *mode;
414 };
415 
416 static struct team_mode_item *__find_mode(const char *kind)
417 {
418 	struct team_mode_item *mitem;
419 
420 	list_for_each_entry(mitem, &mode_list, list) {
421 		if (strcmp(mitem->mode->kind, kind) == 0)
422 			return mitem;
423 	}
424 	return NULL;
425 }
426 
427 static bool is_good_mode_name(const char *name)
428 {
429 	while (*name != '\0') {
430 		if (!isalpha(*name) && !isdigit(*name) && *name != '_')
431 			return false;
432 		name++;
433 	}
434 	return true;
435 }
436 
437 int team_mode_register(const struct team_mode *mode)
438 {
439 	int err = 0;
440 	struct team_mode_item *mitem;
441 
442 	if (!is_good_mode_name(mode->kind) ||
443 	    mode->priv_size > TEAM_MODE_PRIV_SIZE)
444 		return -EINVAL;
445 
446 	mitem = kmalloc(sizeof(*mitem), GFP_KERNEL);
447 	if (!mitem)
448 		return -ENOMEM;
449 
450 	spin_lock(&mode_list_lock);
451 	if (__find_mode(mode->kind)) {
452 		err = -EEXIST;
453 		kfree(mitem);
454 		goto unlock;
455 	}
456 	mitem->mode = mode;
457 	list_add_tail(&mitem->list, &mode_list);
458 unlock:
459 	spin_unlock(&mode_list_lock);
460 	return err;
461 }
462 EXPORT_SYMBOL(team_mode_register);
463 
464 void team_mode_unregister(const struct team_mode *mode)
465 {
466 	struct team_mode_item *mitem;
467 
468 	spin_lock(&mode_list_lock);
469 	mitem = __find_mode(mode->kind);
470 	if (mitem) {
471 		list_del_init(&mitem->list);
472 		kfree(mitem);
473 	}
474 	spin_unlock(&mode_list_lock);
475 }
476 EXPORT_SYMBOL(team_mode_unregister);
477 
478 static const struct team_mode *team_mode_get(const char *kind)
479 {
480 	struct team_mode_item *mitem;
481 	const struct team_mode *mode = NULL;
482 
483 	spin_lock(&mode_list_lock);
484 	mitem = __find_mode(kind);
485 	if (!mitem) {
486 		spin_unlock(&mode_list_lock);
487 		request_module("team-mode-%s", kind);
488 		spin_lock(&mode_list_lock);
489 		mitem = __find_mode(kind);
490 	}
491 	if (mitem) {
492 		mode = mitem->mode;
493 		if (!try_module_get(mode->owner))
494 			mode = NULL;
495 	}
496 
497 	spin_unlock(&mode_list_lock);
498 	return mode;
499 }
500 
501 static void team_mode_put(const struct team_mode *mode)
502 {
503 	module_put(mode->owner);
504 }
505 
506 static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
507 {
508 	dev_kfree_skb_any(skb);
509 	return false;
510 }
511 
512 static rx_handler_result_t team_dummy_receive(struct team *team,
513 					      struct team_port *port,
514 					      struct sk_buff *skb)
515 {
516 	return RX_HANDLER_ANOTHER;
517 }
518 
519 static const struct team_mode __team_no_mode = {
520 	.kind		= "*NOMODE*",
521 };
522 
523 static bool team_is_mode_set(struct team *team)
524 {
525 	return team->mode != &__team_no_mode;
526 }
527 
528 static void team_set_no_mode(struct team *team)
529 {
530 	team->user_carrier_enabled = false;
531 	team->mode = &__team_no_mode;
532 }
533 
534 static void team_adjust_ops(struct team *team)
535 {
536 	/*
537 	 * To avoid checks in rx/tx skb paths, ensure here that non-null and
538 	 * correct ops are always set.
539 	 */
540 
541 	if (!team->en_port_count || !team_is_mode_set(team) ||
542 	    !team->mode->ops->transmit)
543 		team->ops.transmit = team_dummy_transmit;
544 	else
545 		team->ops.transmit = team->mode->ops->transmit;
546 
547 	if (!team->en_port_count || !team_is_mode_set(team) ||
548 	    !team->mode->ops->receive)
549 		team->ops.receive = team_dummy_receive;
550 	else
551 		team->ops.receive = team->mode->ops->receive;
552 }
553 
554 /*
555  * We can benefit from the fact that it's ensured no port is present
556  * at the time of mode change. Therefore no packets are in fly so there's no
557  * need to set mode operations in any special way.
558  */
559 static int __team_change_mode(struct team *team,
560 			      const struct team_mode *new_mode)
561 {
562 	/* Check if mode was previously set and do cleanup if so */
563 	if (team_is_mode_set(team)) {
564 		void (*exit_op)(struct team *team) = team->ops.exit;
565 
566 		/* Clear ops area so no callback is called any longer */
567 		memset(&team->ops, 0, sizeof(struct team_mode_ops));
568 		team_adjust_ops(team);
569 
570 		if (exit_op)
571 			exit_op(team);
572 		team_mode_put(team->mode);
573 		team_set_no_mode(team);
574 		/* zero private data area */
575 		memset(&team->mode_priv, 0,
576 		       sizeof(struct team) - offsetof(struct team, mode_priv));
577 	}
578 
579 	if (!new_mode)
580 		return 0;
581 
582 	if (new_mode->ops->init) {
583 		int err;
584 
585 		err = new_mode->ops->init(team);
586 		if (err)
587 			return err;
588 	}
589 
590 	team->mode = new_mode;
591 	memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
592 	team_adjust_ops(team);
593 
594 	return 0;
595 }
596 
597 static int team_change_mode(struct team *team, const char *kind)
598 {
599 	const struct team_mode *new_mode;
600 	struct net_device *dev = team->dev;
601 	int err;
602 
603 	if (!list_empty(&team->port_list)) {
604 		netdev_err(dev, "No ports can be present during mode change\n");
605 		return -EBUSY;
606 	}
607 
608 	if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) {
609 		netdev_err(dev, "Unable to change to the same mode the team is in\n");
610 		return -EINVAL;
611 	}
612 
613 	new_mode = team_mode_get(kind);
614 	if (!new_mode) {
615 		netdev_err(dev, "Mode \"%s\" not found\n", kind);
616 		return -EINVAL;
617 	}
618 
619 	err = __team_change_mode(team, new_mode);
620 	if (err) {
621 		netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
622 		team_mode_put(new_mode);
623 		return err;
624 	}
625 
626 	netdev_info(dev, "Mode changed to \"%s\"\n", kind);
627 	return 0;
628 }
629 
630 
631 /*********************
632  * Peers notification
633  *********************/
634 
635 static void team_notify_peers_work(struct work_struct *work)
636 {
637 	struct team *team;
638 	int val;
639 
640 	team = container_of(work, struct team, notify_peers.dw.work);
641 
642 	if (!rtnl_trylock()) {
643 		schedule_delayed_work(&team->notify_peers.dw, 0);
644 		return;
645 	}
646 	val = atomic_dec_if_positive(&team->notify_peers.count_pending);
647 	if (val < 0) {
648 		rtnl_unlock();
649 		return;
650 	}
651 	call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, team->dev);
652 	rtnl_unlock();
653 	if (val)
654 		schedule_delayed_work(&team->notify_peers.dw,
655 				      msecs_to_jiffies(team->notify_peers.interval));
656 }
657 
658 static void team_notify_peers(struct team *team)
659 {
660 	if (!team->notify_peers.count || !netif_running(team->dev))
661 		return;
662 	atomic_add(team->notify_peers.count, &team->notify_peers.count_pending);
663 	schedule_delayed_work(&team->notify_peers.dw, 0);
664 }
665 
666 static void team_notify_peers_init(struct team *team)
667 {
668 	INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work);
669 }
670 
671 static void team_notify_peers_fini(struct team *team)
672 {
673 	cancel_delayed_work_sync(&team->notify_peers.dw);
674 }
675 
676 
677 /*******************************
678  * Send multicast group rejoins
679  *******************************/
680 
681 static void team_mcast_rejoin_work(struct work_struct *work)
682 {
683 	struct team *team;
684 	int val;
685 
686 	team = container_of(work, struct team, mcast_rejoin.dw.work);
687 
688 	if (!rtnl_trylock()) {
689 		schedule_delayed_work(&team->mcast_rejoin.dw, 0);
690 		return;
691 	}
692 	val = atomic_dec_if_positive(&team->mcast_rejoin.count_pending);
693 	if (val < 0) {
694 		rtnl_unlock();
695 		return;
696 	}
697 	call_netdevice_notifiers(NETDEV_RESEND_IGMP, team->dev);
698 	rtnl_unlock();
699 	if (val)
700 		schedule_delayed_work(&team->mcast_rejoin.dw,
701 				      msecs_to_jiffies(team->mcast_rejoin.interval));
702 }
703 
704 static void team_mcast_rejoin(struct team *team)
705 {
706 	if (!team->mcast_rejoin.count || !netif_running(team->dev))
707 		return;
708 	atomic_add(team->mcast_rejoin.count, &team->mcast_rejoin.count_pending);
709 	schedule_delayed_work(&team->mcast_rejoin.dw, 0);
710 }
711 
712 static void team_mcast_rejoin_init(struct team *team)
713 {
714 	INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work);
715 }
716 
717 static void team_mcast_rejoin_fini(struct team *team)
718 {
719 	cancel_delayed_work_sync(&team->mcast_rejoin.dw);
720 }
721 
722 
723 /************************
724  * Rx path frame handler
725  ************************/
726 
727 /* note: already called with rcu_read_lock */
728 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
729 {
730 	struct sk_buff *skb = *pskb;
731 	struct team_port *port;
732 	struct team *team;
733 	rx_handler_result_t res;
734 
735 	skb = skb_share_check(skb, GFP_ATOMIC);
736 	if (!skb)
737 		return RX_HANDLER_CONSUMED;
738 
739 	*pskb = skb;
740 
741 	port = team_port_get_rcu(skb->dev);
742 	team = port->team;
743 	if (!team_port_enabled(port)) {
744 		/* allow exact match delivery for disabled ports */
745 		res = RX_HANDLER_EXACT;
746 	} else {
747 		res = team->ops.receive(team, port, skb);
748 	}
749 	if (res == RX_HANDLER_ANOTHER) {
750 		struct team_pcpu_stats *pcpu_stats;
751 
752 		pcpu_stats = this_cpu_ptr(team->pcpu_stats);
753 		u64_stats_update_begin(&pcpu_stats->syncp);
754 		pcpu_stats->rx_packets++;
755 		pcpu_stats->rx_bytes += skb->len;
756 		if (skb->pkt_type == PACKET_MULTICAST)
757 			pcpu_stats->rx_multicast++;
758 		u64_stats_update_end(&pcpu_stats->syncp);
759 
760 		skb->dev = team->dev;
761 	} else if (res == RX_HANDLER_EXACT) {
762 		this_cpu_inc(team->pcpu_stats->rx_nohandler);
763 	} else {
764 		this_cpu_inc(team->pcpu_stats->rx_dropped);
765 	}
766 
767 	return res;
768 }
769 
770 
771 /*************************************
772  * Multiqueue Tx port select override
773  *************************************/
774 
775 static int team_queue_override_init(struct team *team)
776 {
777 	struct list_head *listarr;
778 	unsigned int queue_cnt = team->dev->num_tx_queues - 1;
779 	unsigned int i;
780 
781 	if (!queue_cnt)
782 		return 0;
783 	listarr = kmalloc(sizeof(struct list_head) * queue_cnt, GFP_KERNEL);
784 	if (!listarr)
785 		return -ENOMEM;
786 	team->qom_lists = listarr;
787 	for (i = 0; i < queue_cnt; i++)
788 		INIT_LIST_HEAD(listarr++);
789 	return 0;
790 }
791 
792 static void team_queue_override_fini(struct team *team)
793 {
794 	kfree(team->qom_lists);
795 }
796 
797 static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
798 {
799 	return &team->qom_lists[queue_id - 1];
800 }
801 
802 /*
803  * note: already called with rcu_read_lock
804  */
805 static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
806 {
807 	struct list_head *qom_list;
808 	struct team_port *port;
809 
810 	if (!team->queue_override_enabled || !skb->queue_mapping)
811 		return false;
812 	qom_list = __team_get_qom_list(team, skb->queue_mapping);
813 	list_for_each_entry_rcu(port, qom_list, qom_list) {
814 		if (!team_dev_queue_xmit(team, port, skb))
815 			return true;
816 	}
817 	return false;
818 }
819 
820 static void __team_queue_override_port_del(struct team *team,
821 					   struct team_port *port)
822 {
823 	if (!port->queue_id)
824 		return;
825 	list_del_rcu(&port->qom_list);
826 }
827 
828 static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
829 						      struct team_port *cur)
830 {
831 	if (port->priority < cur->priority)
832 		return true;
833 	if (port->priority > cur->priority)
834 		return false;
835 	if (port->index < cur->index)
836 		return true;
837 	return false;
838 }
839 
840 static void __team_queue_override_port_add(struct team *team,
841 					   struct team_port *port)
842 {
843 	struct team_port *cur;
844 	struct list_head *qom_list;
845 	struct list_head *node;
846 
847 	if (!port->queue_id)
848 		return;
849 	qom_list = __team_get_qom_list(team, port->queue_id);
850 	node = qom_list;
851 	list_for_each_entry(cur, qom_list, qom_list) {
852 		if (team_queue_override_port_has_gt_prio_than(port, cur))
853 			break;
854 		node = &cur->qom_list;
855 	}
856 	list_add_tail_rcu(&port->qom_list, node);
857 }
858 
859 static void __team_queue_override_enabled_check(struct team *team)
860 {
861 	struct team_port *port;
862 	bool enabled = false;
863 
864 	list_for_each_entry(port, &team->port_list, list) {
865 		if (port->queue_id) {
866 			enabled = true;
867 			break;
868 		}
869 	}
870 	if (enabled == team->queue_override_enabled)
871 		return;
872 	netdev_dbg(team->dev, "%s queue override\n",
873 		   enabled ? "Enabling" : "Disabling");
874 	team->queue_override_enabled = enabled;
875 }
876 
877 static void team_queue_override_port_prio_changed(struct team *team,
878 						  struct team_port *port)
879 {
880 	if (!port->queue_id || team_port_enabled(port))
881 		return;
882 	__team_queue_override_port_del(team, port);
883 	__team_queue_override_port_add(team, port);
884 	__team_queue_override_enabled_check(team);
885 }
886 
887 static void team_queue_override_port_change_queue_id(struct team *team,
888 						     struct team_port *port,
889 						     u16 new_queue_id)
890 {
891 	if (team_port_enabled(port)) {
892 		__team_queue_override_port_del(team, port);
893 		port->queue_id = new_queue_id;
894 		__team_queue_override_port_add(team, port);
895 		__team_queue_override_enabled_check(team);
896 	} else {
897 		port->queue_id = new_queue_id;
898 	}
899 }
900 
901 static void team_queue_override_port_add(struct team *team,
902 					 struct team_port *port)
903 {
904 	__team_queue_override_port_add(team, port);
905 	__team_queue_override_enabled_check(team);
906 }
907 
908 static void team_queue_override_port_del(struct team *team,
909 					 struct team_port *port)
910 {
911 	__team_queue_override_port_del(team, port);
912 	__team_queue_override_enabled_check(team);
913 }
914 
915 
916 /****************
917  * Port handling
918  ****************/
919 
920 static bool team_port_find(const struct team *team,
921 			   const struct team_port *port)
922 {
923 	struct team_port *cur;
924 
925 	list_for_each_entry(cur, &team->port_list, list)
926 		if (cur == port)
927 			return true;
928 	return false;
929 }
930 
931 /*
932  * Enable/disable port by adding to enabled port hashlist and setting
933  * port->index (Might be racy so reader could see incorrect ifindex when
934  * processing a flying packet, but that is not a problem). Write guarded
935  * by team->lock.
936  */
937 static void team_port_enable(struct team *team,
938 			     struct team_port *port)
939 {
940 	if (team_port_enabled(port))
941 		return;
942 	port->index = team->en_port_count++;
943 	hlist_add_head_rcu(&port->hlist,
944 			   team_port_index_hash(team, port->index));
945 	team_adjust_ops(team);
946 	team_queue_override_port_add(team, port);
947 	if (team->ops.port_enabled)
948 		team->ops.port_enabled(team, port);
949 	team_notify_peers(team);
950 	team_mcast_rejoin(team);
951 	team_lower_state_changed(port);
952 }
953 
954 static void __reconstruct_port_hlist(struct team *team, int rm_index)
955 {
956 	int i;
957 	struct team_port *port;
958 
959 	for (i = rm_index + 1; i < team->en_port_count; i++) {
960 		port = team_get_port_by_index(team, i);
961 		hlist_del_rcu(&port->hlist);
962 		port->index--;
963 		hlist_add_head_rcu(&port->hlist,
964 				   team_port_index_hash(team, port->index));
965 	}
966 }
967 
968 static void team_port_disable(struct team *team,
969 			      struct team_port *port)
970 {
971 	if (!team_port_enabled(port))
972 		return;
973 	if (team->ops.port_disabled)
974 		team->ops.port_disabled(team, port);
975 	hlist_del_rcu(&port->hlist);
976 	__reconstruct_port_hlist(team, port->index);
977 	port->index = -1;
978 	team->en_port_count--;
979 	team_queue_override_port_del(team, port);
980 	team_adjust_ops(team);
981 	team_notify_peers(team);
982 	team_mcast_rejoin(team);
983 	team_lower_state_changed(port);
984 }
985 
986 #define TEAM_VLAN_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
987 			    NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
988 			    NETIF_F_HIGHDMA | NETIF_F_LRO)
989 
990 #define TEAM_ENC_FEATURES	(NETIF_F_HW_CSUM | NETIF_F_SG | \
991 				 NETIF_F_RXCSUM | NETIF_F_ALL_TSO)
992 
993 static void __team_compute_features(struct team *team)
994 {
995 	struct team_port *port;
996 	u32 vlan_features = TEAM_VLAN_FEATURES & NETIF_F_ALL_FOR_ALL;
997 	netdev_features_t enc_features  = TEAM_ENC_FEATURES;
998 	unsigned short max_hard_header_len = ETH_HLEN;
999 	unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE |
1000 					IFF_XMIT_DST_RELEASE_PERM;
1001 
1002 	list_for_each_entry(port, &team->port_list, list) {
1003 		vlan_features = netdev_increment_features(vlan_features,
1004 					port->dev->vlan_features,
1005 					TEAM_VLAN_FEATURES);
1006 		enc_features =
1007 			netdev_increment_features(enc_features,
1008 						  port->dev->hw_enc_features,
1009 						  TEAM_ENC_FEATURES);
1010 
1011 
1012 		dst_release_flag &= port->dev->priv_flags;
1013 		if (port->dev->hard_header_len > max_hard_header_len)
1014 			max_hard_header_len = port->dev->hard_header_len;
1015 	}
1016 
1017 	team->dev->vlan_features = vlan_features;
1018 	team->dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL;
1019 	team->dev->hard_header_len = max_hard_header_len;
1020 
1021 	team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
1022 	if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
1023 		team->dev->priv_flags |= IFF_XMIT_DST_RELEASE;
1024 }
1025 
1026 static void team_compute_features(struct team *team)
1027 {
1028 	mutex_lock(&team->lock);
1029 	__team_compute_features(team);
1030 	mutex_unlock(&team->lock);
1031 	netdev_change_features(team->dev);
1032 }
1033 
1034 static 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 
1050 err_port_enter:
1051 	dev_put(team->dev);
1052 
1053 	return err;
1054 }
1055 
1056 static 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
1064 static int team_port_enable_netpoll(struct team *team, struct team_port *port)
1065 {
1066 	struct netpoll *np;
1067 	int err;
1068 
1069 	if (!team->dev->npinfo)
1070 		return 0;
1071 
1072 	np = kzalloc(sizeof(*np), GFP_KERNEL);
1073 	if (!np)
1074 		return -ENOMEM;
1075 
1076 	err = __netpoll_setup(np, port->dev);
1077 	if (err) {
1078 		kfree(np);
1079 		return err;
1080 	}
1081 	port->np = np;
1082 	return err;
1083 }
1084 
1085 static void team_port_disable_netpoll(struct team_port *port)
1086 {
1087 	struct netpoll *np = port->np;
1088 
1089 	if (!np)
1090 		return;
1091 	port->np = NULL;
1092 
1093 	/* Wait for transmitting packets to finish before freeing. */
1094 	synchronize_rcu_bh();
1095 	__netpoll_cleanup(np);
1096 	kfree(np);
1097 }
1098 #else
1099 static int team_port_enable_netpoll(struct team *team, struct team_port *port)
1100 {
1101 	return 0;
1102 }
1103 static void team_port_disable_netpoll(struct team_port *port)
1104 {
1105 }
1106 #endif
1107 
1108 static int team_upper_dev_link(struct team *team, struct team_port *port)
1109 {
1110 	struct netdev_lag_upper_info lag_upper_info;
1111 	int err;
1112 
1113 	lag_upper_info.tx_type = team->mode->lag_tx_type;
1114 	err = netdev_master_upper_dev_link(port->dev, team->dev, NULL,
1115 					   &lag_upper_info);
1116 	if (err)
1117 		return err;
1118 	port->dev->priv_flags |= IFF_TEAM_PORT;
1119 	return 0;
1120 }
1121 
1122 static void team_upper_dev_unlink(struct team *team, struct team_port *port)
1123 {
1124 	netdev_upper_dev_unlink(port->dev, team->dev);
1125 	port->dev->priv_flags &= ~IFF_TEAM_PORT;
1126 }
1127 
1128 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1129 static int team_dev_type_check_change(struct net_device *dev,
1130 				      struct net_device *port_dev);
1131 
1132 static int team_port_add(struct team *team, struct net_device *port_dev)
1133 {
1134 	struct net_device *dev = team->dev;
1135 	struct team_port *port;
1136 	char *portname = port_dev->name;
1137 	int err;
1138 
1139 	if (port_dev->flags & IFF_LOOPBACK) {
1140 		netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1141 			   portname);
1142 		return -EINVAL;
1143 	}
1144 
1145 	if (team_port_exists(port_dev)) {
1146 		netdev_err(dev, "Device %s is already a port "
1147 				"of a team device\n", portname);
1148 		return -EBUSY;
1149 	}
1150 
1151 	if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1152 	    vlan_uses_dev(dev)) {
1153 		netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1154 			   portname);
1155 		return -EPERM;
1156 	}
1157 
1158 	err = team_dev_type_check_change(dev, port_dev);
1159 	if (err)
1160 		return err;
1161 
1162 	if (port_dev->flags & IFF_UP) {
1163 		netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1164 			   portname);
1165 		return -EBUSY;
1166 	}
1167 
1168 	port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1169 		       GFP_KERNEL);
1170 	if (!port)
1171 		return -ENOMEM;
1172 
1173 	port->dev = port_dev;
1174 	port->team = team;
1175 	INIT_LIST_HEAD(&port->qom_list);
1176 
1177 	port->orig.mtu = port_dev->mtu;
1178 	err = dev_set_mtu(port_dev, dev->mtu);
1179 	if (err) {
1180 		netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1181 		goto err_set_mtu;
1182 	}
1183 
1184 	memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1185 
1186 	err = team_port_enter(team, port);
1187 	if (err) {
1188 		netdev_err(dev, "Device %s failed to enter team mode\n",
1189 			   portname);
1190 		goto err_port_enter;
1191 	}
1192 
1193 	err = dev_open(port_dev);
1194 	if (err) {
1195 		netdev_dbg(dev, "Device %s opening failed\n",
1196 			   portname);
1197 		goto err_dev_open;
1198 	}
1199 
1200 	netif_addr_lock_bh(dev);
1201 	dev_uc_sync_multiple(port_dev, dev);
1202 	dev_mc_sync_multiple(port_dev, dev);
1203 	netif_addr_unlock_bh(dev);
1204 
1205 	err = vlan_vids_add_by_dev(port_dev, dev);
1206 	if (err) {
1207 		netdev_err(dev, "Failed to add vlan ids to device %s\n",
1208 				portname);
1209 		goto err_vids_add;
1210 	}
1211 
1212 	err = team_port_enable_netpoll(team, port);
1213 	if (err) {
1214 		netdev_err(dev, "Failed to enable netpoll on device %s\n",
1215 			   portname);
1216 		goto err_enable_netpoll;
1217 	}
1218 
1219 	if (!(dev->features & NETIF_F_LRO))
1220 		dev_disable_lro(port_dev);
1221 
1222 	err = netdev_rx_handler_register(port_dev, team_handle_frame,
1223 					 port);
1224 	if (err) {
1225 		netdev_err(dev, "Device %s failed to register rx_handler\n",
1226 			   portname);
1227 		goto err_handler_register;
1228 	}
1229 
1230 	err = team_upper_dev_link(team, port);
1231 	if (err) {
1232 		netdev_err(dev, "Device %s failed to set upper link\n",
1233 			   portname);
1234 		goto err_set_upper_link;
1235 	}
1236 
1237 	err = __team_option_inst_add_port(team, port);
1238 	if (err) {
1239 		netdev_err(dev, "Device %s failed to add per-port options\n",
1240 			   portname);
1241 		goto err_option_port_add;
1242 	}
1243 
1244 	port->index = -1;
1245 	list_add_tail_rcu(&port->list, &team->port_list);
1246 	team_port_enable(team, port);
1247 	__team_compute_features(team);
1248 	__team_port_change_port_added(port, !!netif_carrier_ok(port_dev));
1249 	__team_options_change_check(team);
1250 
1251 	netdev_info(dev, "Port device %s added\n", portname);
1252 
1253 	return 0;
1254 
1255 err_option_port_add:
1256 	team_upper_dev_unlink(team, port);
1257 
1258 err_set_upper_link:
1259 	netdev_rx_handler_unregister(port_dev);
1260 
1261 err_handler_register:
1262 	team_port_disable_netpoll(port);
1263 
1264 err_enable_netpoll:
1265 	vlan_vids_del_by_dev(port_dev, dev);
1266 
1267 err_vids_add:
1268 	dev_uc_unsync(port_dev, dev);
1269 	dev_mc_unsync(port_dev, dev);
1270 	dev_close(port_dev);
1271 
1272 err_dev_open:
1273 	team_port_leave(team, port);
1274 	team_port_set_orig_dev_addr(port);
1275 
1276 err_port_enter:
1277 	dev_set_mtu(port_dev, port->orig.mtu);
1278 
1279 err_set_mtu:
1280 	kfree(port);
1281 
1282 	return err;
1283 }
1284 
1285 static void __team_port_change_port_removed(struct team_port *port);
1286 
1287 static int team_port_del(struct team *team, struct net_device *port_dev)
1288 {
1289 	struct net_device *dev = team->dev;
1290 	struct team_port *port;
1291 	char *portname = port_dev->name;
1292 
1293 	port = team_port_get_rtnl(port_dev);
1294 	if (!port || !team_port_find(team, port)) {
1295 		netdev_err(dev, "Device %s does not act as a port of this team\n",
1296 			   portname);
1297 		return -ENOENT;
1298 	}
1299 
1300 	team_port_disable(team, port);
1301 	list_del_rcu(&port->list);
1302 	team_upper_dev_unlink(team, port);
1303 	netdev_rx_handler_unregister(port_dev);
1304 	team_port_disable_netpoll(port);
1305 	vlan_vids_del_by_dev(port_dev, dev);
1306 	dev_uc_unsync(port_dev, dev);
1307 	dev_mc_unsync(port_dev, dev);
1308 	dev_close(port_dev);
1309 	team_port_leave(team, port);
1310 
1311 	__team_option_inst_mark_removed_port(team, port);
1312 	__team_options_change_check(team);
1313 	__team_option_inst_del_port(team, port);
1314 	__team_port_change_port_removed(port);
1315 
1316 	team_port_set_orig_dev_addr(port);
1317 	dev_set_mtu(port_dev, port->orig.mtu);
1318 	kfree_rcu(port, rcu);
1319 	netdev_info(dev, "Port device %s removed\n", portname);
1320 	__team_compute_features(team);
1321 
1322 	return 0;
1323 }
1324 
1325 
1326 /*****************
1327  * Net device ops
1328  *****************/
1329 
1330 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1331 {
1332 	ctx->data.str_val = team->mode->kind;
1333 	return 0;
1334 }
1335 
1336 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1337 {
1338 	return team_change_mode(team, ctx->data.str_val);
1339 }
1340 
1341 static int team_notify_peers_count_get(struct team *team,
1342 				       struct team_gsetter_ctx *ctx)
1343 {
1344 	ctx->data.u32_val = team->notify_peers.count;
1345 	return 0;
1346 }
1347 
1348 static int team_notify_peers_count_set(struct team *team,
1349 				       struct team_gsetter_ctx *ctx)
1350 {
1351 	team->notify_peers.count = ctx->data.u32_val;
1352 	return 0;
1353 }
1354 
1355 static int team_notify_peers_interval_get(struct team *team,
1356 					  struct team_gsetter_ctx *ctx)
1357 {
1358 	ctx->data.u32_val = team->notify_peers.interval;
1359 	return 0;
1360 }
1361 
1362 static int team_notify_peers_interval_set(struct team *team,
1363 					  struct team_gsetter_ctx *ctx)
1364 {
1365 	team->notify_peers.interval = ctx->data.u32_val;
1366 	return 0;
1367 }
1368 
1369 static int team_mcast_rejoin_count_get(struct team *team,
1370 				       struct team_gsetter_ctx *ctx)
1371 {
1372 	ctx->data.u32_val = team->mcast_rejoin.count;
1373 	return 0;
1374 }
1375 
1376 static int team_mcast_rejoin_count_set(struct team *team,
1377 				       struct team_gsetter_ctx *ctx)
1378 {
1379 	team->mcast_rejoin.count = ctx->data.u32_val;
1380 	return 0;
1381 }
1382 
1383 static int team_mcast_rejoin_interval_get(struct team *team,
1384 					  struct team_gsetter_ctx *ctx)
1385 {
1386 	ctx->data.u32_val = team->mcast_rejoin.interval;
1387 	return 0;
1388 }
1389 
1390 static int team_mcast_rejoin_interval_set(struct team *team,
1391 					  struct team_gsetter_ctx *ctx)
1392 {
1393 	team->mcast_rejoin.interval = ctx->data.u32_val;
1394 	return 0;
1395 }
1396 
1397 static int team_port_en_option_get(struct team *team,
1398 				   struct team_gsetter_ctx *ctx)
1399 {
1400 	struct team_port *port = ctx->info->port;
1401 
1402 	ctx->data.bool_val = team_port_enabled(port);
1403 	return 0;
1404 }
1405 
1406 static int team_port_en_option_set(struct team *team,
1407 				   struct team_gsetter_ctx *ctx)
1408 {
1409 	struct team_port *port = ctx->info->port;
1410 
1411 	if (ctx->data.bool_val)
1412 		team_port_enable(team, port);
1413 	else
1414 		team_port_disable(team, port);
1415 	return 0;
1416 }
1417 
1418 static int team_user_linkup_option_get(struct team *team,
1419 				       struct team_gsetter_ctx *ctx)
1420 {
1421 	struct team_port *port = ctx->info->port;
1422 
1423 	ctx->data.bool_val = port->user.linkup;
1424 	return 0;
1425 }
1426 
1427 static void __team_carrier_check(struct team *team);
1428 
1429 static int team_user_linkup_option_set(struct team *team,
1430 				       struct team_gsetter_ctx *ctx)
1431 {
1432 	struct team_port *port = ctx->info->port;
1433 
1434 	port->user.linkup = ctx->data.bool_val;
1435 	team_refresh_port_linkup(port);
1436 	__team_carrier_check(port->team);
1437 	return 0;
1438 }
1439 
1440 static int team_user_linkup_en_option_get(struct team *team,
1441 					  struct team_gsetter_ctx *ctx)
1442 {
1443 	struct team_port *port = ctx->info->port;
1444 
1445 	ctx->data.bool_val = port->user.linkup_enabled;
1446 	return 0;
1447 }
1448 
1449 static int team_user_linkup_en_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_enabled = ctx->data.bool_val;
1455 	team_refresh_port_linkup(port);
1456 	__team_carrier_check(port->team);
1457 	return 0;
1458 }
1459 
1460 static int team_priority_option_get(struct team *team,
1461 				    struct team_gsetter_ctx *ctx)
1462 {
1463 	struct team_port *port = ctx->info->port;
1464 
1465 	ctx->data.s32_val = port->priority;
1466 	return 0;
1467 }
1468 
1469 static int team_priority_option_set(struct team *team,
1470 				    struct team_gsetter_ctx *ctx)
1471 {
1472 	struct team_port *port = ctx->info->port;
1473 	s32 priority = ctx->data.s32_val;
1474 
1475 	if (port->priority == priority)
1476 		return 0;
1477 	port->priority = priority;
1478 	team_queue_override_port_prio_changed(team, port);
1479 	return 0;
1480 }
1481 
1482 static int team_queue_id_option_get(struct team *team,
1483 				    struct team_gsetter_ctx *ctx)
1484 {
1485 	struct team_port *port = ctx->info->port;
1486 
1487 	ctx->data.u32_val = port->queue_id;
1488 	return 0;
1489 }
1490 
1491 static int team_queue_id_option_set(struct team *team,
1492 				    struct team_gsetter_ctx *ctx)
1493 {
1494 	struct team_port *port = ctx->info->port;
1495 	u16 new_queue_id = ctx->data.u32_val;
1496 
1497 	if (port->queue_id == new_queue_id)
1498 		return 0;
1499 	if (new_queue_id >= team->dev->real_num_tx_queues)
1500 		return -EINVAL;
1501 	team_queue_override_port_change_queue_id(team, port, new_queue_id);
1502 	return 0;
1503 }
1504 
1505 static const struct team_option team_options[] = {
1506 	{
1507 		.name = "mode",
1508 		.type = TEAM_OPTION_TYPE_STRING,
1509 		.getter = team_mode_option_get,
1510 		.setter = team_mode_option_set,
1511 	},
1512 	{
1513 		.name = "notify_peers_count",
1514 		.type = TEAM_OPTION_TYPE_U32,
1515 		.getter = team_notify_peers_count_get,
1516 		.setter = team_notify_peers_count_set,
1517 	},
1518 	{
1519 		.name = "notify_peers_interval",
1520 		.type = TEAM_OPTION_TYPE_U32,
1521 		.getter = team_notify_peers_interval_get,
1522 		.setter = team_notify_peers_interval_set,
1523 	},
1524 	{
1525 		.name = "mcast_rejoin_count",
1526 		.type = TEAM_OPTION_TYPE_U32,
1527 		.getter = team_mcast_rejoin_count_get,
1528 		.setter = team_mcast_rejoin_count_set,
1529 	},
1530 	{
1531 		.name = "mcast_rejoin_interval",
1532 		.type = TEAM_OPTION_TYPE_U32,
1533 		.getter = team_mcast_rejoin_interval_get,
1534 		.setter = team_mcast_rejoin_interval_set,
1535 	},
1536 	{
1537 		.name = "enabled",
1538 		.type = TEAM_OPTION_TYPE_BOOL,
1539 		.per_port = true,
1540 		.getter = team_port_en_option_get,
1541 		.setter = team_port_en_option_set,
1542 	},
1543 	{
1544 		.name = "user_linkup",
1545 		.type = TEAM_OPTION_TYPE_BOOL,
1546 		.per_port = true,
1547 		.getter = team_user_linkup_option_get,
1548 		.setter = team_user_linkup_option_set,
1549 	},
1550 	{
1551 		.name = "user_linkup_enabled",
1552 		.type = TEAM_OPTION_TYPE_BOOL,
1553 		.per_port = true,
1554 		.getter = team_user_linkup_en_option_get,
1555 		.setter = team_user_linkup_en_option_set,
1556 	},
1557 	{
1558 		.name = "priority",
1559 		.type = TEAM_OPTION_TYPE_S32,
1560 		.per_port = true,
1561 		.getter = team_priority_option_get,
1562 		.setter = team_priority_option_set,
1563 	},
1564 	{
1565 		.name = "queue_id",
1566 		.type = TEAM_OPTION_TYPE_U32,
1567 		.per_port = true,
1568 		.getter = team_queue_id_option_get,
1569 		.setter = team_queue_id_option_set,
1570 	},
1571 };
1572 
1573 
1574 static int team_init(struct net_device *dev)
1575 {
1576 	struct team *team = netdev_priv(dev);
1577 	int i;
1578 	int err;
1579 
1580 	team->dev = dev;
1581 	mutex_init(&team->lock);
1582 	team_set_no_mode(team);
1583 
1584 	team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1585 	if (!team->pcpu_stats)
1586 		return -ENOMEM;
1587 
1588 	for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1589 		INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1590 	INIT_LIST_HEAD(&team->port_list);
1591 	err = team_queue_override_init(team);
1592 	if (err)
1593 		goto err_team_queue_override_init;
1594 
1595 	team_adjust_ops(team);
1596 
1597 	INIT_LIST_HEAD(&team->option_list);
1598 	INIT_LIST_HEAD(&team->option_inst_list);
1599 
1600 	team_notify_peers_init(team);
1601 	team_mcast_rejoin_init(team);
1602 
1603 	err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1604 	if (err)
1605 		goto err_options_register;
1606 	netif_carrier_off(dev);
1607 
1608 	netdev_lockdep_set_classes(dev);
1609 
1610 	return 0;
1611 
1612 err_options_register:
1613 	team_mcast_rejoin_fini(team);
1614 	team_notify_peers_fini(team);
1615 	team_queue_override_fini(team);
1616 err_team_queue_override_init:
1617 	free_percpu(team->pcpu_stats);
1618 
1619 	return err;
1620 }
1621 
1622 static void team_uninit(struct net_device *dev)
1623 {
1624 	struct team *team = netdev_priv(dev);
1625 	struct team_port *port;
1626 	struct team_port *tmp;
1627 
1628 	mutex_lock(&team->lock);
1629 	list_for_each_entry_safe(port, tmp, &team->port_list, list)
1630 		team_port_del(team, port->dev);
1631 
1632 	__team_change_mode(team, NULL); /* cleanup */
1633 	__team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1634 	team_mcast_rejoin_fini(team);
1635 	team_notify_peers_fini(team);
1636 	team_queue_override_fini(team);
1637 	mutex_unlock(&team->lock);
1638 	netdev_change_features(dev);
1639 }
1640 
1641 static void team_destructor(struct net_device *dev)
1642 {
1643 	struct team *team = netdev_priv(dev);
1644 
1645 	free_percpu(team->pcpu_stats);
1646 }
1647 
1648 static int team_open(struct net_device *dev)
1649 {
1650 	return 0;
1651 }
1652 
1653 static int team_close(struct net_device *dev)
1654 {
1655 	return 0;
1656 }
1657 
1658 /*
1659  * note: already called with rcu_read_lock
1660  */
1661 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1662 {
1663 	struct team *team = netdev_priv(dev);
1664 	bool tx_success;
1665 	unsigned int len = skb->len;
1666 
1667 	tx_success = team_queue_override_transmit(team, skb);
1668 	if (!tx_success)
1669 		tx_success = team->ops.transmit(team, skb);
1670 	if (tx_success) {
1671 		struct team_pcpu_stats *pcpu_stats;
1672 
1673 		pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1674 		u64_stats_update_begin(&pcpu_stats->syncp);
1675 		pcpu_stats->tx_packets++;
1676 		pcpu_stats->tx_bytes += len;
1677 		u64_stats_update_end(&pcpu_stats->syncp);
1678 	} else {
1679 		this_cpu_inc(team->pcpu_stats->tx_dropped);
1680 	}
1681 
1682 	return NETDEV_TX_OK;
1683 }
1684 
1685 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1686 			     void *accel_priv, select_queue_fallback_t fallback)
1687 {
1688 	/*
1689 	 * This helper function exists to help dev_pick_tx get the correct
1690 	 * destination queue.  Using a helper function skips a call to
1691 	 * skb_tx_hash and will put the skbs in the queue we expect on their
1692 	 * way down to the team driver.
1693 	 */
1694 	u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1695 
1696 	/*
1697 	 * Save the original txq to restore before passing to the driver
1698 	 */
1699 	qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1700 
1701 	if (unlikely(txq >= dev->real_num_tx_queues)) {
1702 		do {
1703 			txq -= dev->real_num_tx_queues;
1704 		} while (txq >= dev->real_num_tx_queues);
1705 	}
1706 	return txq;
1707 }
1708 
1709 static void team_change_rx_flags(struct net_device *dev, int change)
1710 {
1711 	struct team *team = netdev_priv(dev);
1712 	struct team_port *port;
1713 	int inc;
1714 
1715 	rcu_read_lock();
1716 	list_for_each_entry_rcu(port, &team->port_list, list) {
1717 		if (change & IFF_PROMISC) {
1718 			inc = dev->flags & IFF_PROMISC ? 1 : -1;
1719 			dev_set_promiscuity(port->dev, inc);
1720 		}
1721 		if (change & IFF_ALLMULTI) {
1722 			inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1723 			dev_set_allmulti(port->dev, inc);
1724 		}
1725 	}
1726 	rcu_read_unlock();
1727 }
1728 
1729 static void team_set_rx_mode(struct net_device *dev)
1730 {
1731 	struct team *team = netdev_priv(dev);
1732 	struct team_port *port;
1733 
1734 	rcu_read_lock();
1735 	list_for_each_entry_rcu(port, &team->port_list, list) {
1736 		dev_uc_sync_multiple(port->dev, dev);
1737 		dev_mc_sync_multiple(port->dev, dev);
1738 	}
1739 	rcu_read_unlock();
1740 }
1741 
1742 static int team_set_mac_address(struct net_device *dev, void *p)
1743 {
1744 	struct sockaddr *addr = p;
1745 	struct team *team = netdev_priv(dev);
1746 	struct team_port *port;
1747 
1748 	if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1749 		return -EADDRNOTAVAIL;
1750 	memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1751 	mutex_lock(&team->lock);
1752 	list_for_each_entry(port, &team->port_list, list)
1753 		if (team->ops.port_change_dev_addr)
1754 			team->ops.port_change_dev_addr(team, port);
1755 	mutex_unlock(&team->lock);
1756 	return 0;
1757 }
1758 
1759 static int team_change_mtu(struct net_device *dev, int new_mtu)
1760 {
1761 	struct team *team = netdev_priv(dev);
1762 	struct team_port *port;
1763 	int err;
1764 
1765 	/*
1766 	 * Alhough this is reader, it's guarded by team lock. It's not possible
1767 	 * to traverse list in reverse under rcu_read_lock
1768 	 */
1769 	mutex_lock(&team->lock);
1770 	team->port_mtu_change_allowed = true;
1771 	list_for_each_entry(port, &team->port_list, list) {
1772 		err = dev_set_mtu(port->dev, new_mtu);
1773 		if (err) {
1774 			netdev_err(dev, "Device %s failed to change mtu",
1775 				   port->dev->name);
1776 			goto unwind;
1777 		}
1778 	}
1779 	team->port_mtu_change_allowed = false;
1780 	mutex_unlock(&team->lock);
1781 
1782 	dev->mtu = new_mtu;
1783 
1784 	return 0;
1785 
1786 unwind:
1787 	list_for_each_entry_continue_reverse(port, &team->port_list, list)
1788 		dev_set_mtu(port->dev, dev->mtu);
1789 	team->port_mtu_change_allowed = false;
1790 	mutex_unlock(&team->lock);
1791 
1792 	return err;
1793 }
1794 
1795 static void
1796 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1797 {
1798 	struct team *team = netdev_priv(dev);
1799 	struct team_pcpu_stats *p;
1800 	u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1801 	u32 rx_dropped = 0, tx_dropped = 0, rx_nohandler = 0;
1802 	unsigned int start;
1803 	int i;
1804 
1805 	for_each_possible_cpu(i) {
1806 		p = per_cpu_ptr(team->pcpu_stats, i);
1807 		do {
1808 			start = u64_stats_fetch_begin_irq(&p->syncp);
1809 			rx_packets	= p->rx_packets;
1810 			rx_bytes	= p->rx_bytes;
1811 			rx_multicast	= p->rx_multicast;
1812 			tx_packets	= p->tx_packets;
1813 			tx_bytes	= p->tx_bytes;
1814 		} while (u64_stats_fetch_retry_irq(&p->syncp, start));
1815 
1816 		stats->rx_packets	+= rx_packets;
1817 		stats->rx_bytes		+= rx_bytes;
1818 		stats->multicast	+= rx_multicast;
1819 		stats->tx_packets	+= tx_packets;
1820 		stats->tx_bytes		+= tx_bytes;
1821 		/*
1822 		 * rx_dropped, tx_dropped & rx_nohandler are u32,
1823 		 * updated without syncp protection.
1824 		 */
1825 		rx_dropped	+= p->rx_dropped;
1826 		tx_dropped	+= p->tx_dropped;
1827 		rx_nohandler	+= p->rx_nohandler;
1828 	}
1829 	stats->rx_dropped	= rx_dropped;
1830 	stats->tx_dropped	= tx_dropped;
1831 	stats->rx_nohandler	= rx_nohandler;
1832 }
1833 
1834 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1835 {
1836 	struct team *team = netdev_priv(dev);
1837 	struct team_port *port;
1838 	int err;
1839 
1840 	/*
1841 	 * Alhough this is reader, it's guarded by team lock. It's not possible
1842 	 * to traverse list in reverse under rcu_read_lock
1843 	 */
1844 	mutex_lock(&team->lock);
1845 	list_for_each_entry(port, &team->port_list, list) {
1846 		err = vlan_vid_add(port->dev, proto, vid);
1847 		if (err)
1848 			goto unwind;
1849 	}
1850 	mutex_unlock(&team->lock);
1851 
1852 	return 0;
1853 
1854 unwind:
1855 	list_for_each_entry_continue_reverse(port, &team->port_list, list)
1856 		vlan_vid_del(port->dev, proto, vid);
1857 	mutex_unlock(&team->lock);
1858 
1859 	return err;
1860 }
1861 
1862 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1863 {
1864 	struct team *team = netdev_priv(dev);
1865 	struct team_port *port;
1866 
1867 	mutex_lock(&team->lock);
1868 	list_for_each_entry(port, &team->port_list, list)
1869 		vlan_vid_del(port->dev, proto, vid);
1870 	mutex_unlock(&team->lock);
1871 
1872 	return 0;
1873 }
1874 
1875 #ifdef CONFIG_NET_POLL_CONTROLLER
1876 static void team_poll_controller(struct net_device *dev)
1877 {
1878 }
1879 
1880 static void __team_netpoll_cleanup(struct team *team)
1881 {
1882 	struct team_port *port;
1883 
1884 	list_for_each_entry(port, &team->port_list, list)
1885 		team_port_disable_netpoll(port);
1886 }
1887 
1888 static void team_netpoll_cleanup(struct net_device *dev)
1889 {
1890 	struct team *team = netdev_priv(dev);
1891 
1892 	mutex_lock(&team->lock);
1893 	__team_netpoll_cleanup(team);
1894 	mutex_unlock(&team->lock);
1895 }
1896 
1897 static int team_netpoll_setup(struct net_device *dev,
1898 			      struct netpoll_info *npifo)
1899 {
1900 	struct team *team = netdev_priv(dev);
1901 	struct team_port *port;
1902 	int err = 0;
1903 
1904 	mutex_lock(&team->lock);
1905 	list_for_each_entry(port, &team->port_list, list) {
1906 		err = team_port_enable_netpoll(team, port);
1907 		if (err) {
1908 			__team_netpoll_cleanup(team);
1909 			break;
1910 		}
1911 	}
1912 	mutex_unlock(&team->lock);
1913 	return err;
1914 }
1915 #endif
1916 
1917 static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
1918 {
1919 	struct team *team = netdev_priv(dev);
1920 	int err;
1921 
1922 	mutex_lock(&team->lock);
1923 	err = team_port_add(team, port_dev);
1924 	mutex_unlock(&team->lock);
1925 
1926 	if (!err)
1927 		netdev_change_features(dev);
1928 
1929 	return err;
1930 }
1931 
1932 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1933 {
1934 	struct team *team = netdev_priv(dev);
1935 	int err;
1936 
1937 	mutex_lock(&team->lock);
1938 	err = team_port_del(team, port_dev);
1939 	mutex_unlock(&team->lock);
1940 
1941 	if (!err)
1942 		netdev_change_features(dev);
1943 
1944 	return err;
1945 }
1946 
1947 static netdev_features_t team_fix_features(struct net_device *dev,
1948 					   netdev_features_t features)
1949 {
1950 	struct team_port *port;
1951 	struct team *team = netdev_priv(dev);
1952 	netdev_features_t mask;
1953 
1954 	mask = features;
1955 	features &= ~NETIF_F_ONE_FOR_ALL;
1956 	features |= NETIF_F_ALL_FOR_ALL;
1957 
1958 	rcu_read_lock();
1959 	list_for_each_entry_rcu(port, &team->port_list, list) {
1960 		features = netdev_increment_features(features,
1961 						     port->dev->features,
1962 						     mask);
1963 	}
1964 	rcu_read_unlock();
1965 
1966 	features = netdev_add_tso_features(features, mask);
1967 
1968 	return features;
1969 }
1970 
1971 static int team_change_carrier(struct net_device *dev, bool new_carrier)
1972 {
1973 	struct team *team = netdev_priv(dev);
1974 
1975 	team->user_carrier_enabled = true;
1976 
1977 	if (new_carrier)
1978 		netif_carrier_on(dev);
1979 	else
1980 		netif_carrier_off(dev);
1981 	return 0;
1982 }
1983 
1984 static const struct net_device_ops team_netdev_ops = {
1985 	.ndo_init		= team_init,
1986 	.ndo_uninit		= team_uninit,
1987 	.ndo_open		= team_open,
1988 	.ndo_stop		= team_close,
1989 	.ndo_start_xmit		= team_xmit,
1990 	.ndo_select_queue	= team_select_queue,
1991 	.ndo_change_rx_flags	= team_change_rx_flags,
1992 	.ndo_set_rx_mode	= team_set_rx_mode,
1993 	.ndo_set_mac_address	= team_set_mac_address,
1994 	.ndo_change_mtu		= team_change_mtu,
1995 	.ndo_get_stats64	= team_get_stats64,
1996 	.ndo_vlan_rx_add_vid	= team_vlan_rx_add_vid,
1997 	.ndo_vlan_rx_kill_vid	= team_vlan_rx_kill_vid,
1998 #ifdef CONFIG_NET_POLL_CONTROLLER
1999 	.ndo_poll_controller	= team_poll_controller,
2000 	.ndo_netpoll_setup	= team_netpoll_setup,
2001 	.ndo_netpoll_cleanup	= team_netpoll_cleanup,
2002 #endif
2003 	.ndo_add_slave		= team_add_slave,
2004 	.ndo_del_slave		= team_del_slave,
2005 	.ndo_fix_features	= team_fix_features,
2006 	.ndo_change_carrier     = team_change_carrier,
2007 	.ndo_features_check	= passthru_features_check,
2008 };
2009 
2010 /***********************
2011  * ethtool interface
2012  ***********************/
2013 
2014 static void team_ethtool_get_drvinfo(struct net_device *dev,
2015 				     struct ethtool_drvinfo *drvinfo)
2016 {
2017 	strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
2018 	strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2019 }
2020 
2021 static const struct ethtool_ops team_ethtool_ops = {
2022 	.get_drvinfo		= team_ethtool_get_drvinfo,
2023 	.get_link		= ethtool_op_get_link,
2024 };
2025 
2026 /***********************
2027  * rt netlink interface
2028  ***********************/
2029 
2030 static void team_setup_by_port(struct net_device *dev,
2031 			       struct net_device *port_dev)
2032 {
2033 	dev->header_ops	= port_dev->header_ops;
2034 	dev->type = port_dev->type;
2035 	dev->hard_header_len = port_dev->hard_header_len;
2036 	dev->addr_len = port_dev->addr_len;
2037 	dev->mtu = port_dev->mtu;
2038 	memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2039 	eth_hw_addr_inherit(dev, port_dev);
2040 }
2041 
2042 static int team_dev_type_check_change(struct net_device *dev,
2043 				      struct net_device *port_dev)
2044 {
2045 	struct team *team = netdev_priv(dev);
2046 	char *portname = port_dev->name;
2047 	int err;
2048 
2049 	if (dev->type == port_dev->type)
2050 		return 0;
2051 	if (!list_empty(&team->port_list)) {
2052 		netdev_err(dev, "Device %s is of different type\n", portname);
2053 		return -EBUSY;
2054 	}
2055 	err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2056 	err = notifier_to_errno(err);
2057 	if (err) {
2058 		netdev_err(dev, "Refused to change device type\n");
2059 		return err;
2060 	}
2061 	dev_uc_flush(dev);
2062 	dev_mc_flush(dev);
2063 	team_setup_by_port(dev, port_dev);
2064 	call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2065 	return 0;
2066 }
2067 
2068 static void team_setup(struct net_device *dev)
2069 {
2070 	ether_setup(dev);
2071 	dev->max_mtu = ETH_MAX_MTU;
2072 
2073 	dev->netdev_ops = &team_netdev_ops;
2074 	dev->ethtool_ops = &team_ethtool_ops;
2075 	dev->needs_free_netdev = true;
2076 	dev->priv_destructor = team_destructor;
2077 	dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2078 	dev->priv_flags |= IFF_NO_QUEUE;
2079 	dev->priv_flags |= IFF_TEAM;
2080 
2081 	/*
2082 	 * Indicate we support unicast address filtering. That way core won't
2083 	 * bring us to promisc mode in case a unicast addr is added.
2084 	 * Let this up to underlay drivers.
2085 	 */
2086 	dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2087 
2088 	dev->features |= NETIF_F_LLTX;
2089 	dev->features |= NETIF_F_GRO;
2090 
2091 	/* Don't allow team devices to change network namespaces. */
2092 	dev->features |= NETIF_F_NETNS_LOCAL;
2093 
2094 	dev->hw_features = TEAM_VLAN_FEATURES |
2095 			   NETIF_F_HW_VLAN_CTAG_TX |
2096 			   NETIF_F_HW_VLAN_CTAG_RX |
2097 			   NETIF_F_HW_VLAN_CTAG_FILTER;
2098 
2099 	dev->hw_features |= NETIF_F_GSO_ENCAP_ALL;
2100 	dev->features |= dev->hw_features;
2101 }
2102 
2103 static int team_newlink(struct net *src_net, struct net_device *dev,
2104 			struct nlattr *tb[], struct nlattr *data[],
2105 			struct netlink_ext_ack *extack)
2106 {
2107 	if (tb[IFLA_ADDRESS] == NULL)
2108 		eth_hw_addr_random(dev);
2109 
2110 	return register_netdevice(dev);
2111 }
2112 
2113 static int team_validate(struct nlattr *tb[], struct nlattr *data[],
2114 			 struct netlink_ext_ack *extack)
2115 {
2116 	if (tb[IFLA_ADDRESS]) {
2117 		if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2118 			return -EINVAL;
2119 		if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2120 			return -EADDRNOTAVAIL;
2121 	}
2122 	return 0;
2123 }
2124 
2125 static unsigned int team_get_num_tx_queues(void)
2126 {
2127 	return TEAM_DEFAULT_NUM_TX_QUEUES;
2128 }
2129 
2130 static unsigned int team_get_num_rx_queues(void)
2131 {
2132 	return TEAM_DEFAULT_NUM_RX_QUEUES;
2133 }
2134 
2135 static struct rtnl_link_ops team_link_ops __read_mostly = {
2136 	.kind			= DRV_NAME,
2137 	.priv_size		= sizeof(struct team),
2138 	.setup			= team_setup,
2139 	.newlink		= team_newlink,
2140 	.validate		= team_validate,
2141 	.get_num_tx_queues	= team_get_num_tx_queues,
2142 	.get_num_rx_queues	= team_get_num_rx_queues,
2143 };
2144 
2145 
2146 /***********************************
2147  * Generic netlink custom interface
2148  ***********************************/
2149 
2150 static struct genl_family team_nl_family;
2151 
2152 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2153 	[TEAM_ATTR_UNSPEC]			= { .type = NLA_UNSPEC, },
2154 	[TEAM_ATTR_TEAM_IFINDEX]		= { .type = NLA_U32 },
2155 	[TEAM_ATTR_LIST_OPTION]			= { .type = NLA_NESTED },
2156 	[TEAM_ATTR_LIST_PORT]			= { .type = NLA_NESTED },
2157 };
2158 
2159 static const struct nla_policy
2160 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2161 	[TEAM_ATTR_OPTION_UNSPEC]		= { .type = NLA_UNSPEC, },
2162 	[TEAM_ATTR_OPTION_NAME] = {
2163 		.type = NLA_STRING,
2164 		.len = TEAM_STRING_MAX_LEN,
2165 	},
2166 	[TEAM_ATTR_OPTION_CHANGED]		= { .type = NLA_FLAG },
2167 	[TEAM_ATTR_OPTION_TYPE]			= { .type = NLA_U8 },
2168 	[TEAM_ATTR_OPTION_DATA]			= { .type = NLA_BINARY },
2169 };
2170 
2171 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2172 {
2173 	struct sk_buff *msg;
2174 	void *hdr;
2175 	int err;
2176 
2177 	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2178 	if (!msg)
2179 		return -ENOMEM;
2180 
2181 	hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2182 			  &team_nl_family, 0, TEAM_CMD_NOOP);
2183 	if (!hdr) {
2184 		err = -EMSGSIZE;
2185 		goto err_msg_put;
2186 	}
2187 
2188 	genlmsg_end(msg, hdr);
2189 
2190 	return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2191 
2192 err_msg_put:
2193 	nlmsg_free(msg);
2194 
2195 	return err;
2196 }
2197 
2198 /*
2199  * Netlink cmd functions should be locked by following two functions.
2200  * Since dev gets held here, that ensures dev won't disappear in between.
2201  */
2202 static struct team *team_nl_team_get(struct genl_info *info)
2203 {
2204 	struct net *net = genl_info_net(info);
2205 	int ifindex;
2206 	struct net_device *dev;
2207 	struct team *team;
2208 
2209 	if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2210 		return NULL;
2211 
2212 	ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2213 	dev = dev_get_by_index(net, ifindex);
2214 	if (!dev || dev->netdev_ops != &team_netdev_ops) {
2215 		if (dev)
2216 			dev_put(dev);
2217 		return NULL;
2218 	}
2219 
2220 	team = netdev_priv(dev);
2221 	mutex_lock(&team->lock);
2222 	return team;
2223 }
2224 
2225 static void team_nl_team_put(struct team *team)
2226 {
2227 	mutex_unlock(&team->lock);
2228 	dev_put(team->dev);
2229 }
2230 
2231 typedef int team_nl_send_func_t(struct sk_buff *skb,
2232 				struct team *team, u32 portid);
2233 
2234 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2235 {
2236 	return genlmsg_unicast(dev_net(team->dev), skb, portid);
2237 }
2238 
2239 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2240 				       struct team_option_inst *opt_inst)
2241 {
2242 	struct nlattr *option_item;
2243 	struct team_option *option = opt_inst->option;
2244 	struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2245 	struct team_gsetter_ctx ctx;
2246 	int err;
2247 
2248 	ctx.info = opt_inst_info;
2249 	err = team_option_get(team, opt_inst, &ctx);
2250 	if (err)
2251 		return err;
2252 
2253 	option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
2254 	if (!option_item)
2255 		return -EMSGSIZE;
2256 
2257 	if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2258 		goto nest_cancel;
2259 	if (opt_inst_info->port &&
2260 	    nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2261 			opt_inst_info->port->dev->ifindex))
2262 		goto nest_cancel;
2263 	if (opt_inst->option->array_size &&
2264 	    nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2265 			opt_inst_info->array_index))
2266 		goto nest_cancel;
2267 
2268 	switch (option->type) {
2269 	case TEAM_OPTION_TYPE_U32:
2270 		if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2271 			goto nest_cancel;
2272 		if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2273 			goto nest_cancel;
2274 		break;
2275 	case TEAM_OPTION_TYPE_STRING:
2276 		if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2277 			goto nest_cancel;
2278 		if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2279 				   ctx.data.str_val))
2280 			goto nest_cancel;
2281 		break;
2282 	case TEAM_OPTION_TYPE_BINARY:
2283 		if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2284 			goto nest_cancel;
2285 		if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2286 			    ctx.data.bin_val.ptr))
2287 			goto nest_cancel;
2288 		break;
2289 	case TEAM_OPTION_TYPE_BOOL:
2290 		if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2291 			goto nest_cancel;
2292 		if (ctx.data.bool_val &&
2293 		    nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2294 			goto nest_cancel;
2295 		break;
2296 	case TEAM_OPTION_TYPE_S32:
2297 		if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2298 			goto nest_cancel;
2299 		if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2300 			goto nest_cancel;
2301 		break;
2302 	default:
2303 		BUG();
2304 	}
2305 	if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2306 		goto nest_cancel;
2307 	if (opt_inst->changed) {
2308 		if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2309 			goto nest_cancel;
2310 		opt_inst->changed = false;
2311 	}
2312 	nla_nest_end(skb, option_item);
2313 	return 0;
2314 
2315 nest_cancel:
2316 	nla_nest_cancel(skb, option_item);
2317 	return -EMSGSIZE;
2318 }
2319 
2320 static int __send_and_alloc_skb(struct sk_buff **pskb,
2321 				struct team *team, u32 portid,
2322 				team_nl_send_func_t *send_func)
2323 {
2324 	int err;
2325 
2326 	if (*pskb) {
2327 		err = send_func(*pskb, team, portid);
2328 		if (err)
2329 			return err;
2330 	}
2331 	*pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2332 	if (!*pskb)
2333 		return -ENOMEM;
2334 	return 0;
2335 }
2336 
2337 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2338 				    int flags, team_nl_send_func_t *send_func,
2339 				    struct list_head *sel_opt_inst_list)
2340 {
2341 	struct nlattr *option_list;
2342 	struct nlmsghdr *nlh;
2343 	void *hdr;
2344 	struct team_option_inst *opt_inst;
2345 	int err;
2346 	struct sk_buff *skb = NULL;
2347 	bool incomplete;
2348 	int i;
2349 
2350 	opt_inst = list_first_entry(sel_opt_inst_list,
2351 				    struct team_option_inst, tmp_list);
2352 
2353 start_again:
2354 	err = __send_and_alloc_skb(&skb, team, portid, send_func);
2355 	if (err)
2356 		return err;
2357 
2358 	hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2359 			  TEAM_CMD_OPTIONS_GET);
2360 	if (!hdr) {
2361 		nlmsg_free(skb);
2362 		return -EMSGSIZE;
2363 	}
2364 
2365 	if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2366 		goto nla_put_failure;
2367 	option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2368 	if (!option_list)
2369 		goto nla_put_failure;
2370 
2371 	i = 0;
2372 	incomplete = false;
2373 	list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2374 		err = team_nl_fill_one_option_get(skb, team, opt_inst);
2375 		if (err) {
2376 			if (err == -EMSGSIZE) {
2377 				if (!i)
2378 					goto errout;
2379 				incomplete = true;
2380 				break;
2381 			}
2382 			goto errout;
2383 		}
2384 		i++;
2385 	}
2386 
2387 	nla_nest_end(skb, option_list);
2388 	genlmsg_end(skb, hdr);
2389 	if (incomplete)
2390 		goto start_again;
2391 
2392 send_done:
2393 	nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2394 	if (!nlh) {
2395 		err = __send_and_alloc_skb(&skb, team, portid, send_func);
2396 		if (err)
2397 			goto errout;
2398 		goto send_done;
2399 	}
2400 
2401 	return send_func(skb, team, portid);
2402 
2403 nla_put_failure:
2404 	err = -EMSGSIZE;
2405 errout:
2406 	genlmsg_cancel(skb, hdr);
2407 	nlmsg_free(skb);
2408 	return err;
2409 }
2410 
2411 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2412 {
2413 	struct team *team;
2414 	struct team_option_inst *opt_inst;
2415 	int err;
2416 	LIST_HEAD(sel_opt_inst_list);
2417 
2418 	team = team_nl_team_get(info);
2419 	if (!team)
2420 		return -EINVAL;
2421 
2422 	list_for_each_entry(opt_inst, &team->option_inst_list, list)
2423 		list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2424 	err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2425 				       NLM_F_ACK, team_nl_send_unicast,
2426 				       &sel_opt_inst_list);
2427 
2428 	team_nl_team_put(team);
2429 
2430 	return err;
2431 }
2432 
2433 static int team_nl_send_event_options_get(struct team *team,
2434 					  struct list_head *sel_opt_inst_list);
2435 
2436 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2437 {
2438 	struct team *team;
2439 	int err = 0;
2440 	int i;
2441 	struct nlattr *nl_option;
2442 	LIST_HEAD(opt_inst_list);
2443 
2444 	rtnl_lock();
2445 
2446 	team = team_nl_team_get(info);
2447 	if (!team) {
2448 		err = -EINVAL;
2449 		goto rtnl_unlock;
2450 	}
2451 
2452 	err = -EINVAL;
2453 	if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2454 		err = -EINVAL;
2455 		goto team_put;
2456 	}
2457 
2458 	nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2459 		struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2460 		struct nlattr *attr;
2461 		struct nlattr *attr_data;
2462 		enum team_option_type opt_type;
2463 		int opt_port_ifindex = 0; /* != 0 for per-port options */
2464 		u32 opt_array_index = 0;
2465 		bool opt_is_array = false;
2466 		struct team_option_inst *opt_inst;
2467 		char *opt_name;
2468 		bool opt_found = false;
2469 
2470 		if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2471 			err = -EINVAL;
2472 			goto team_put;
2473 		}
2474 		err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2475 				       nl_option, team_nl_option_policy,
2476 				       info->extack);
2477 		if (err)
2478 			goto team_put;
2479 		if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2480 		    !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2481 			err = -EINVAL;
2482 			goto team_put;
2483 		}
2484 		switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2485 		case NLA_U32:
2486 			opt_type = TEAM_OPTION_TYPE_U32;
2487 			break;
2488 		case NLA_STRING:
2489 			opt_type = TEAM_OPTION_TYPE_STRING;
2490 			break;
2491 		case NLA_BINARY:
2492 			opt_type = TEAM_OPTION_TYPE_BINARY;
2493 			break;
2494 		case NLA_FLAG:
2495 			opt_type = TEAM_OPTION_TYPE_BOOL;
2496 			break;
2497 		case NLA_S32:
2498 			opt_type = TEAM_OPTION_TYPE_S32;
2499 			break;
2500 		default:
2501 			goto team_put;
2502 		}
2503 
2504 		attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2505 		if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2506 			err = -EINVAL;
2507 			goto team_put;
2508 		}
2509 
2510 		opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2511 		attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2512 		if (attr)
2513 			opt_port_ifindex = nla_get_u32(attr);
2514 
2515 		attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2516 		if (attr) {
2517 			opt_is_array = true;
2518 			opt_array_index = nla_get_u32(attr);
2519 		}
2520 
2521 		list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2522 			struct team_option *option = opt_inst->option;
2523 			struct team_gsetter_ctx ctx;
2524 			struct team_option_inst_info *opt_inst_info;
2525 			int tmp_ifindex;
2526 
2527 			opt_inst_info = &opt_inst->info;
2528 			tmp_ifindex = opt_inst_info->port ?
2529 				      opt_inst_info->port->dev->ifindex : 0;
2530 			if (option->type != opt_type ||
2531 			    strcmp(option->name, opt_name) ||
2532 			    tmp_ifindex != opt_port_ifindex ||
2533 			    (option->array_size && !opt_is_array) ||
2534 			    opt_inst_info->array_index != opt_array_index)
2535 				continue;
2536 			opt_found = true;
2537 			ctx.info = opt_inst_info;
2538 			switch (opt_type) {
2539 			case TEAM_OPTION_TYPE_U32:
2540 				ctx.data.u32_val = nla_get_u32(attr_data);
2541 				break;
2542 			case TEAM_OPTION_TYPE_STRING:
2543 				if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2544 					err = -EINVAL;
2545 					goto team_put;
2546 				}
2547 				ctx.data.str_val = nla_data(attr_data);
2548 				break;
2549 			case TEAM_OPTION_TYPE_BINARY:
2550 				ctx.data.bin_val.len = nla_len(attr_data);
2551 				ctx.data.bin_val.ptr = nla_data(attr_data);
2552 				break;
2553 			case TEAM_OPTION_TYPE_BOOL:
2554 				ctx.data.bool_val = attr_data ? true : false;
2555 				break;
2556 			case TEAM_OPTION_TYPE_S32:
2557 				ctx.data.s32_val = nla_get_s32(attr_data);
2558 				break;
2559 			default:
2560 				BUG();
2561 			}
2562 			err = team_option_set(team, opt_inst, &ctx);
2563 			if (err)
2564 				goto team_put;
2565 			opt_inst->changed = true;
2566 			list_add(&opt_inst->tmp_list, &opt_inst_list);
2567 		}
2568 		if (!opt_found) {
2569 			err = -ENOENT;
2570 			goto team_put;
2571 		}
2572 	}
2573 
2574 	err = team_nl_send_event_options_get(team, &opt_inst_list);
2575 
2576 team_put:
2577 	team_nl_team_put(team);
2578 rtnl_unlock:
2579 	rtnl_unlock();
2580 	return err;
2581 }
2582 
2583 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2584 				     struct team_port *port)
2585 {
2586 	struct nlattr *port_item;
2587 
2588 	port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2589 	if (!port_item)
2590 		goto nest_cancel;
2591 	if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2592 		goto nest_cancel;
2593 	if (port->changed) {
2594 		if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2595 			goto nest_cancel;
2596 		port->changed = false;
2597 	}
2598 	if ((port->removed &&
2599 	     nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2600 	    (port->state.linkup &&
2601 	     nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2602 	    nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2603 	    nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2604 		goto nest_cancel;
2605 	nla_nest_end(skb, port_item);
2606 	return 0;
2607 
2608 nest_cancel:
2609 	nla_nest_cancel(skb, port_item);
2610 	return -EMSGSIZE;
2611 }
2612 
2613 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2614 				      int flags, team_nl_send_func_t *send_func,
2615 				      struct team_port *one_port)
2616 {
2617 	struct nlattr *port_list;
2618 	struct nlmsghdr *nlh;
2619 	void *hdr;
2620 	struct team_port *port;
2621 	int err;
2622 	struct sk_buff *skb = NULL;
2623 	bool incomplete;
2624 	int i;
2625 
2626 	port = list_first_entry_or_null(&team->port_list,
2627 					struct team_port, list);
2628 
2629 start_again:
2630 	err = __send_and_alloc_skb(&skb, team, portid, send_func);
2631 	if (err)
2632 		return err;
2633 
2634 	hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2635 			  TEAM_CMD_PORT_LIST_GET);
2636 	if (!hdr) {
2637 		nlmsg_free(skb);
2638 		return -EMSGSIZE;
2639 	}
2640 
2641 	if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2642 		goto nla_put_failure;
2643 	port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2644 	if (!port_list)
2645 		goto nla_put_failure;
2646 
2647 	i = 0;
2648 	incomplete = false;
2649 
2650 	/* If one port is selected, called wants to send port list containing
2651 	 * only this port. Otherwise go through all listed ports and send all
2652 	 */
2653 	if (one_port) {
2654 		err = team_nl_fill_one_port_get(skb, one_port);
2655 		if (err)
2656 			goto errout;
2657 	} else if (port) {
2658 		list_for_each_entry_from(port, &team->port_list, list) {
2659 			err = team_nl_fill_one_port_get(skb, port);
2660 			if (err) {
2661 				if (err == -EMSGSIZE) {
2662 					if (!i)
2663 						goto errout;
2664 					incomplete = true;
2665 					break;
2666 				}
2667 				goto errout;
2668 			}
2669 			i++;
2670 		}
2671 	}
2672 
2673 	nla_nest_end(skb, port_list);
2674 	genlmsg_end(skb, hdr);
2675 	if (incomplete)
2676 		goto start_again;
2677 
2678 send_done:
2679 	nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2680 	if (!nlh) {
2681 		err = __send_and_alloc_skb(&skb, team, portid, send_func);
2682 		if (err)
2683 			goto errout;
2684 		goto send_done;
2685 	}
2686 
2687 	return send_func(skb, team, portid);
2688 
2689 nla_put_failure:
2690 	err = -EMSGSIZE;
2691 errout:
2692 	genlmsg_cancel(skb, hdr);
2693 	nlmsg_free(skb);
2694 	return err;
2695 }
2696 
2697 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2698 				     struct genl_info *info)
2699 {
2700 	struct team *team;
2701 	int err;
2702 
2703 	team = team_nl_team_get(info);
2704 	if (!team)
2705 		return -EINVAL;
2706 
2707 	err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2708 					 NLM_F_ACK, team_nl_send_unicast, NULL);
2709 
2710 	team_nl_team_put(team);
2711 
2712 	return err;
2713 }
2714 
2715 static const struct genl_ops team_nl_ops[] = {
2716 	{
2717 		.cmd = TEAM_CMD_NOOP,
2718 		.doit = team_nl_cmd_noop,
2719 		.policy = team_nl_policy,
2720 	},
2721 	{
2722 		.cmd = TEAM_CMD_OPTIONS_SET,
2723 		.doit = team_nl_cmd_options_set,
2724 		.policy = team_nl_policy,
2725 		.flags = GENL_ADMIN_PERM,
2726 	},
2727 	{
2728 		.cmd = TEAM_CMD_OPTIONS_GET,
2729 		.doit = team_nl_cmd_options_get,
2730 		.policy = team_nl_policy,
2731 		.flags = GENL_ADMIN_PERM,
2732 	},
2733 	{
2734 		.cmd = TEAM_CMD_PORT_LIST_GET,
2735 		.doit = team_nl_cmd_port_list_get,
2736 		.policy = team_nl_policy,
2737 		.flags = GENL_ADMIN_PERM,
2738 	},
2739 };
2740 
2741 static const struct genl_multicast_group team_nl_mcgrps[] = {
2742 	{ .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2743 };
2744 
2745 static struct genl_family team_nl_family __ro_after_init = {
2746 	.name		= TEAM_GENL_NAME,
2747 	.version	= TEAM_GENL_VERSION,
2748 	.maxattr	= TEAM_ATTR_MAX,
2749 	.netnsok	= true,
2750 	.module		= THIS_MODULE,
2751 	.ops		= team_nl_ops,
2752 	.n_ops		= ARRAY_SIZE(team_nl_ops),
2753 	.mcgrps		= team_nl_mcgrps,
2754 	.n_mcgrps	= ARRAY_SIZE(team_nl_mcgrps),
2755 };
2756 
2757 static int team_nl_send_multicast(struct sk_buff *skb,
2758 				  struct team *team, u32 portid)
2759 {
2760 	return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2761 				       skb, 0, 0, GFP_KERNEL);
2762 }
2763 
2764 static int team_nl_send_event_options_get(struct team *team,
2765 					  struct list_head *sel_opt_inst_list)
2766 {
2767 	return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2768 					sel_opt_inst_list);
2769 }
2770 
2771 static int team_nl_send_event_port_get(struct team *team,
2772 				       struct team_port *port)
2773 {
2774 	return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2775 					  port);
2776 }
2777 
2778 static int __init team_nl_init(void)
2779 {
2780 	return genl_register_family(&team_nl_family);
2781 }
2782 
2783 static void team_nl_fini(void)
2784 {
2785 	genl_unregister_family(&team_nl_family);
2786 }
2787 
2788 
2789 /******************
2790  * Change checkers
2791  ******************/
2792 
2793 static void __team_options_change_check(struct team *team)
2794 {
2795 	int err;
2796 	struct team_option_inst *opt_inst;
2797 	LIST_HEAD(sel_opt_inst_list);
2798 
2799 	list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2800 		if (opt_inst->changed)
2801 			list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2802 	}
2803 	err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2804 	if (err && err != -ESRCH)
2805 		netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2806 			    err);
2807 }
2808 
2809 /* rtnl lock is held */
2810 
2811 static void __team_port_change_send(struct team_port *port, bool linkup)
2812 {
2813 	int err;
2814 
2815 	port->changed = true;
2816 	port->state.linkup = linkup;
2817 	team_refresh_port_linkup(port);
2818 	if (linkup) {
2819 		struct ethtool_link_ksettings ecmd;
2820 
2821 		err = __ethtool_get_link_ksettings(port->dev, &ecmd);
2822 		if (!err) {
2823 			port->state.speed = ecmd.base.speed;
2824 			port->state.duplex = ecmd.base.duplex;
2825 			goto send_event;
2826 		}
2827 	}
2828 	port->state.speed = 0;
2829 	port->state.duplex = 0;
2830 
2831 send_event:
2832 	err = team_nl_send_event_port_get(port->team, port);
2833 	if (err && err != -ESRCH)
2834 		netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2835 			    port->dev->name, err);
2836 
2837 }
2838 
2839 static void __team_carrier_check(struct team *team)
2840 {
2841 	struct team_port *port;
2842 	bool team_linkup;
2843 
2844 	if (team->user_carrier_enabled)
2845 		return;
2846 
2847 	team_linkup = false;
2848 	list_for_each_entry(port, &team->port_list, list) {
2849 		if (port->linkup) {
2850 			team_linkup = true;
2851 			break;
2852 		}
2853 	}
2854 
2855 	if (team_linkup)
2856 		netif_carrier_on(team->dev);
2857 	else
2858 		netif_carrier_off(team->dev);
2859 }
2860 
2861 static void __team_port_change_check(struct team_port *port, bool linkup)
2862 {
2863 	if (port->state.linkup != linkup)
2864 		__team_port_change_send(port, linkup);
2865 	__team_carrier_check(port->team);
2866 }
2867 
2868 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2869 {
2870 	__team_port_change_send(port, linkup);
2871 	__team_carrier_check(port->team);
2872 }
2873 
2874 static void __team_port_change_port_removed(struct team_port *port)
2875 {
2876 	port->removed = true;
2877 	__team_port_change_send(port, false);
2878 	__team_carrier_check(port->team);
2879 }
2880 
2881 static void team_port_change_check(struct team_port *port, bool linkup)
2882 {
2883 	struct team *team = port->team;
2884 
2885 	mutex_lock(&team->lock);
2886 	__team_port_change_check(port, linkup);
2887 	mutex_unlock(&team->lock);
2888 }
2889 
2890 
2891 /************************************
2892  * Net device notifier event handler
2893  ************************************/
2894 
2895 static int team_device_event(struct notifier_block *unused,
2896 			     unsigned long event, void *ptr)
2897 {
2898 	struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2899 	struct team_port *port;
2900 
2901 	port = team_port_get_rtnl(dev);
2902 	if (!port)
2903 		return NOTIFY_DONE;
2904 
2905 	switch (event) {
2906 	case NETDEV_UP:
2907 		if (netif_carrier_ok(dev))
2908 			team_port_change_check(port, true);
2909 		break;
2910 	case NETDEV_DOWN:
2911 		team_port_change_check(port, false);
2912 		break;
2913 	case NETDEV_CHANGE:
2914 		if (netif_running(port->dev))
2915 			team_port_change_check(port,
2916 					       !!netif_carrier_ok(port->dev));
2917 		break;
2918 	case NETDEV_UNREGISTER:
2919 		team_del_slave(port->team->dev, dev);
2920 		break;
2921 	case NETDEV_FEAT_CHANGE:
2922 		team_compute_features(port->team);
2923 		break;
2924 	case NETDEV_PRECHANGEMTU:
2925 		/* Forbid to change mtu of underlaying device */
2926 		if (!port->team->port_mtu_change_allowed)
2927 			return NOTIFY_BAD;
2928 		break;
2929 	case NETDEV_PRE_TYPE_CHANGE:
2930 		/* Forbid to change type of underlaying device */
2931 		return NOTIFY_BAD;
2932 	case NETDEV_RESEND_IGMP:
2933 		/* Propagate to master device */
2934 		call_netdevice_notifiers(event, port->team->dev);
2935 		break;
2936 	}
2937 	return NOTIFY_DONE;
2938 }
2939 
2940 static struct notifier_block team_notifier_block __read_mostly = {
2941 	.notifier_call = team_device_event,
2942 };
2943 
2944 
2945 /***********************
2946  * Module init and exit
2947  ***********************/
2948 
2949 static int __init team_module_init(void)
2950 {
2951 	int err;
2952 
2953 	register_netdevice_notifier(&team_notifier_block);
2954 
2955 	err = rtnl_link_register(&team_link_ops);
2956 	if (err)
2957 		goto err_rtnl_reg;
2958 
2959 	err = team_nl_init();
2960 	if (err)
2961 		goto err_nl_init;
2962 
2963 	return 0;
2964 
2965 err_nl_init:
2966 	rtnl_link_unregister(&team_link_ops);
2967 
2968 err_rtnl_reg:
2969 	unregister_netdevice_notifier(&team_notifier_block);
2970 
2971 	return err;
2972 }
2973 
2974 static void __exit team_module_exit(void)
2975 {
2976 	team_nl_fini();
2977 	rtnl_link_unregister(&team_link_ops);
2978 	unregister_netdevice_notifier(&team_notifier_block);
2979 }
2980 
2981 module_init(team_module_init);
2982 module_exit(team_module_exit);
2983 
2984 MODULE_LICENSE("GPL v2");
2985 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
2986 MODULE_DESCRIPTION("Ethernet team device driver");
2987 MODULE_ALIAS_RTNL_LINK(DRV_NAME);
2988