xref: /openbmc/linux/drivers/net/team/team.c (revision 3ddc8b84)
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 
38 static 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  */
49 static 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 
59 static 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 
64 static 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 
70 int team_modeop_port_enter(struct team *team, struct team_port *port)
71 {
72 	return team_port_set_team_dev_addr(team, port);
73 }
74 EXPORT_SYMBOL(team_modeop_port_enter);
75 
76 void 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 }
81 EXPORT_SYMBOL(team_modeop_port_change_dev_addr);
82 
83 static 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 
92 static 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 
108 struct 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 
117 static 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 
129 static void __team_option_inst_del(struct team_option_inst *opt_inst)
130 {
131 	list_del(&opt_inst->list);
132 	kfree(opt_inst);
133 }
134 
135 static 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 
146 static 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 
174 static 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 
186 inst_del_option:
187 	__team_option_inst_del_option(team, option);
188 	return err;
189 }
190 
191 static 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 
204 static 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 
216 static 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 
231 inst_del_port:
232 	__team_option_inst_del_port(team, port);
233 	return err;
234 }
235 
236 static 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 
249 static 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 
283 inst_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;
290 alloc_rollback:
291 	for (i--; i >= 0; i--)
292 		kfree(dst_opts[i]);
293 
294 	kfree(dst_opts);
295 	return err;
296 }
297 
298 static 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 
313 static 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 
331 static void __team_options_change_check(struct team *team);
332 
333 int 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 }
345 EXPORT_SYMBOL(team_options_register);
346 
347 void 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 }
355 EXPORT_SYMBOL(team_options_unregister);
356 
357 static 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 
368 static 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 
377 void 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 }
384 EXPORT_SYMBOL(team_option_inst_set_change);
385 
386 void team_options_change_check(struct team *team)
387 {
388 	__team_options_change_check(team);
389 }
390 EXPORT_SYMBOL(team_options_change_check);
391 
392 
393 /****************
394  * Mode handling
395  ****************/
396 
397 static LIST_HEAD(mode_list);
398 static DEFINE_SPINLOCK(mode_list_lock);
399 
400 struct team_mode_item {
401 	struct list_head list;
402 	const struct team_mode *mode;
403 };
404 
405 static 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 
416 static 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 
426 int 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);
447 unlock:
448 	spin_unlock(&mode_list_lock);
449 	return err;
450 }
451 EXPORT_SYMBOL(team_mode_register);
452 
453 void 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 }
465 EXPORT_SYMBOL(team_mode_unregister);
466 
467 static 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 
494 static void team_mode_put(const struct team_mode *mode)
495 {
496 	module_put(mode->owner);
497 }
498 
499 static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
500 {
501 	dev_kfree_skb_any(skb);
502 	return false;
503 }
504 
505 static 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 
512 static const struct team_mode __team_no_mode = {
513 	.kind		= "*NOMODE*",
514 };
515 
516 static bool team_is_mode_set(struct team *team)
517 {
518 	return team->mode != &__team_no_mode;
519 }
520 
521 static void team_set_no_mode(struct team *team)
522 {
523 	team->user_carrier_enabled = false;
524 	team->mode = &__team_no_mode;
525 }
526 
527 static 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  */
552 static 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 
590 static 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 
628 static 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 
651 static 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 
659 static void team_notify_peers_init(struct team *team)
660 {
661 	INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work);
662 }
663 
664 static 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 
674 static 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 
697 static 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 
705 static void team_mcast_rejoin_init(struct team *team)
706 {
707 	INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work);
708 }
709 
710 static 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 */
721 static 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 
773 static 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 
791 static void team_queue_override_fini(struct team *team)
792 {
793 	kfree(team->qom_lists);
794 }
795 
796 static 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  */
804 static 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 
819 static 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 
827 static 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 
839 static 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 
858 static 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 
876 static 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 
886 static 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 
900 static 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 
907 static 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 
919 static 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  */
936 static 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 
953 static 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 
967 static 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 
990 static 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 
1028 static void team_compute_features(struct team *team)
1029 {
1030 	__team_compute_features(team);
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_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 
1082 static 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 
1090 static 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
1101 static int team_port_enable_netpoll(struct team_port *port)
1102 {
1103 	return 0;
1104 }
1105 static void team_port_disable_netpoll(struct team_port *port)
1106 {
1107 }
1108 #endif
1109 
1110 static 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 
1126 static 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 
1132 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1133 static int team_dev_type_check_change(struct net_device *dev,
1134 				      struct net_device *port_dev);
1135 
1136 static 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 
1296 err_set_slave_promisc:
1297 	__team_option_inst_del_port(team, port);
1298 
1299 err_option_port_add:
1300 	team_upper_dev_unlink(team, port);
1301 
1302 err_set_upper_link:
1303 	netdev_rx_handler_unregister(port_dev);
1304 
1305 err_handler_register:
1306 	team_port_disable_netpoll(port);
1307 
1308 err_enable_netpoll:
1309 	vlan_vids_del_by_dev(port_dev, dev);
1310 
1311 err_vids_add:
1312 	dev_close(port_dev);
1313 
1314 err_dev_open:
1315 	team_port_leave(team, port);
1316 	team_port_set_orig_dev_addr(port);
1317 
1318 err_port_enter:
1319 	dev_set_mtu(port_dev, port->orig.mtu);
1320 
1321 err_set_mtu:
1322 	kfree(port);
1323 
1324 	return err;
1325 }
1326 
1327 static void __team_port_change_port_removed(struct team_port *port);
1328 
1329 static 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 
1380 static void team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1381 {
1382 	ctx->data.str_val = team->mode->kind;
1383 }
1384 
1385 static 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 
1390 static 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 
1396 static 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 
1403 static 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 
1409 static 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 
1416 static 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 
1422 static 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 
1429 static 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 
1435 static 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 
1442 static 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 
1450 static 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 
1462 static 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 
1470 static void __team_carrier_check(struct team *team);
1471 
1472 static 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 
1483 static 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 
1491 static 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 
1502 static 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 
1510 static 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 
1523 static 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 
1531 static 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 
1545 static 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 
1614 static 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 
1654 err_options_register:
1655 	team_mcast_rejoin_fini(team);
1656 	team_notify_peers_fini(team);
1657 	team_queue_override_fini(team);
1658 err_team_queue_override_init:
1659 	free_percpu(team->pcpu_stats);
1660 
1661 	return err;
1662 }
1663 
1664 static 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 
1684 static void team_destructor(struct net_device *dev)
1685 {
1686 	struct team *team = netdev_priv(dev);
1687 
1688 	free_percpu(team->pcpu_stats);
1689 }
1690 
1691 static int team_open(struct net_device *dev)
1692 {
1693 	return 0;
1694 }
1695 
1696 static 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  */
1712 static 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 
1736 static 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 
1760 static 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 
1780 static 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 
1793 static 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 
1810 static 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 
1837 unwind:
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 
1846 static void
1847 team_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 
1885 static 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 
1905 unwind:
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 
1913 static 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
1927 static void team_poll_controller(struct net_device *dev)
1928 {
1929 }
1930 
1931 static 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 
1939 static 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 
1948 static 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 
1968 static 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 
1984 static 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 
2006 static 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 
2030 static 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 
2043 static 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 
2073 static 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 
2080 static 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 
2107 static 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 
2117 static 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 
2144 static 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 
2170 static 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 
2210 static 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 
2220 static 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 
2232 static unsigned int team_get_num_tx_queues(void)
2233 {
2234 	return TEAM_DEFAULT_NUM_TX_QUEUES;
2235 }
2236 
2237 static unsigned int team_get_num_rx_queues(void)
2238 {
2239 	return TEAM_DEFAULT_NUM_RX_QUEUES;
2240 }
2241 
2242 static 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 
2257 static struct genl_family team_nl_family;
2258 
2259 static 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 
2266 static const struct nla_policy
2267 team_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 
2280 static 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 
2301 err_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  */
2311 static 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 
2333 static void team_nl_team_put(struct team *team)
2334 {
2335 	mutex_unlock(&team->lock);
2336 	dev_put(team->dev);
2337 }
2338 
2339 typedef int team_nl_send_func_t(struct sk_buff *skb,
2340 				struct team *team, u32 portid);
2341 
2342 static 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 
2347 static 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 
2423 nest_cancel:
2424 	nla_nest_cancel(skb, option_item);
2425 	return -EMSGSIZE;
2426 }
2427 
2428 static 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 
2445 static 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 
2461 start_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 
2500 send_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 
2511 nla_put_failure:
2512 	err = -EMSGSIZE;
2513 errout:
2514 	nlmsg_free(skb);
2515 	return err;
2516 }
2517 
2518 static 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 
2540 static int team_nl_send_event_options_get(struct team *team,
2541 					  struct list_head *sel_opt_inst_list);
2542 
2543 static 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 
2687 team_put:
2688 	team_nl_team_put(team);
2689 rtnl_unlock:
2690 	rtnl_unlock();
2691 	return err;
2692 }
2693 
2694 static 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 
2719 nest_cancel:
2720 	nla_nest_cancel(skb, port_item);
2721 	return -EMSGSIZE;
2722 }
2723 
2724 static 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 
2740 start_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 
2789 send_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 
2800 nla_put_failure:
2801 	err = -EMSGSIZE;
2802 errout:
2803 	nlmsg_free(skb);
2804 	return err;
2805 }
2806 
2807 static 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 
2825 static 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 
2851 static const struct genl_multicast_group team_nl_mcgrps[] = {
2852 	{ .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2853 };
2854 
2855 static 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 
2869 static 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 
2876 static 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 
2883 static 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 
2890 static int __init team_nl_init(void)
2891 {
2892 	return genl_register_family(&team_nl_family);
2893 }
2894 
2895 static void __exit team_nl_fini(void)
2896 {
2897 	genl_unregister_family(&team_nl_family);
2898 }
2899 
2900 
2901 /******************
2902  * Change checkers
2903  ******************/
2904 
2905 static 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 
2923 static 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 
2943 send_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 
2951 static 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 
2973 static 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 
2980 static 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 
2986 static 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 
2993 static 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 
3007 static 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 
3056 static 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 
3065 static 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 
3081 err_nl_init:
3082 	rtnl_link_unregister(&team_link_ops);
3083 
3084 err_rtnl_reg:
3085 	unregister_netdevice_notifier(&team_notifier_block);
3086 
3087 	return err;
3088 }
3089 
3090 static 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 
3097 module_init(team_module_init);
3098 module_exit(team_module_exit);
3099 
3100 MODULE_LICENSE("GPL v2");
3101 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
3102 MODULE_DESCRIPTION("Ethernet team device driver");
3103 MODULE_ALIAS_RTNL_LINK(DRV_NAME);
3104