xref: /openbmc/linux/drivers/net/team/team.c (revision b34e08d5)
1 /*
2  * drivers/net/team/team.c - Network team device driver
3  * Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com>
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License as published by
7  * the Free Software Foundation; either version 2 of the License, or
8  * (at your option) any later version.
9  */
10 
11 #include <linux/kernel.h>
12 #include <linux/types.h>
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/slab.h>
16 #include <linux/rcupdate.h>
17 #include <linux/errno.h>
18 #include <linux/ctype.h>
19 #include <linux/notifier.h>
20 #include <linux/netdevice.h>
21 #include <linux/netpoll.h>
22 #include <linux/if_vlan.h>
23 #include <linux/if_arp.h>
24 #include <linux/socket.h>
25 #include <linux/etherdevice.h>
26 #include <linux/rtnetlink.h>
27 #include <net/rtnetlink.h>
28 #include <net/genetlink.h>
29 #include <net/netlink.h>
30 #include <net/sch_generic.h>
31 #include <generated/utsrelease.h>
32 #include <linux/if_team.h>
33 
34 #define DRV_NAME "team"
35 
36 
37 /**********
38  * Helpers
39  **********/
40 
41 #define team_port_exists(dev) (dev->priv_flags & IFF_TEAM_PORT)
42 
43 static struct team_port *team_port_get_rcu(const struct net_device *dev)
44 {
45 	struct team_port *port = rcu_dereference(dev->rx_handler_data);
46 
47 	return team_port_exists(dev) ? port : NULL;
48 }
49 
50 static struct team_port *team_port_get_rtnl(const struct net_device *dev)
51 {
52 	struct team_port *port = rtnl_dereference(dev->rx_handler_data);
53 
54 	return team_port_exists(dev) ? port : NULL;
55 }
56 
57 /*
58  * Since the ability to change device address for open port device is tested in
59  * team_port_add, this function can be called without control of return value
60  */
61 static int __set_port_dev_addr(struct net_device *port_dev,
62 			       const unsigned char *dev_addr)
63 {
64 	struct sockaddr addr;
65 
66 	memcpy(addr.sa_data, dev_addr, port_dev->addr_len);
67 	addr.sa_family = port_dev->type;
68 	return dev_set_mac_address(port_dev, &addr);
69 }
70 
71 static int team_port_set_orig_dev_addr(struct team_port *port)
72 {
73 	return __set_port_dev_addr(port->dev, port->orig.dev_addr);
74 }
75 
76 static int team_port_set_team_dev_addr(struct team *team,
77 				       struct team_port *port)
78 {
79 	return __set_port_dev_addr(port->dev, team->dev->dev_addr);
80 }
81 
82 int team_modeop_port_enter(struct team *team, struct team_port *port)
83 {
84 	return team_port_set_team_dev_addr(team, port);
85 }
86 EXPORT_SYMBOL(team_modeop_port_enter);
87 
88 void team_modeop_port_change_dev_addr(struct team *team,
89 				      struct team_port *port)
90 {
91 	team_port_set_team_dev_addr(team, port);
92 }
93 EXPORT_SYMBOL(team_modeop_port_change_dev_addr);
94 
95 static void team_refresh_port_linkup(struct team_port *port)
96 {
97 	port->linkup = port->user.linkup_enabled ? port->user.linkup :
98 						   port->state.linkup;
99 }
100 
101 
102 /*******************
103  * Options handling
104  *******************/
105 
106 struct team_option_inst { /* One for each option instance */
107 	struct list_head list;
108 	struct list_head tmp_list;
109 	struct team_option *option;
110 	struct team_option_inst_info info;
111 	bool changed;
112 	bool removed;
113 };
114 
115 static struct team_option *__team_find_option(struct team *team,
116 					      const char *opt_name)
117 {
118 	struct team_option *option;
119 
120 	list_for_each_entry(option, &team->option_list, list) {
121 		if (strcmp(option->name, opt_name) == 0)
122 			return option;
123 	}
124 	return NULL;
125 }
126 
127 static void __team_option_inst_del(struct team_option_inst *opt_inst)
128 {
129 	list_del(&opt_inst->list);
130 	kfree(opt_inst);
131 }
132 
133 static void __team_option_inst_del_option(struct team *team,
134 					  struct team_option *option)
135 {
136 	struct team_option_inst *opt_inst, *tmp;
137 
138 	list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
139 		if (opt_inst->option == option)
140 			__team_option_inst_del(opt_inst);
141 	}
142 }
143 
144 static int __team_option_inst_add(struct team *team, struct team_option *option,
145 				  struct team_port *port)
146 {
147 	struct team_option_inst *opt_inst;
148 	unsigned int array_size;
149 	unsigned int i;
150 	int err;
151 
152 	array_size = option->array_size;
153 	if (!array_size)
154 		array_size = 1; /* No array but still need one instance */
155 
156 	for (i = 0; i < array_size; i++) {
157 		opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL);
158 		if (!opt_inst)
159 			return -ENOMEM;
160 		opt_inst->option = option;
161 		opt_inst->info.port = port;
162 		opt_inst->info.array_index = i;
163 		opt_inst->changed = true;
164 		opt_inst->removed = false;
165 		list_add_tail(&opt_inst->list, &team->option_inst_list);
166 		if (option->init) {
167 			err = option->init(team, &opt_inst->info);
168 			if (err)
169 				return err;
170 		}
171 
172 	}
173 	return 0;
174 }
175 
176 static int __team_option_inst_add_option(struct team *team,
177 					 struct team_option *option)
178 {
179 	struct team_port *port;
180 	int err;
181 
182 	if (!option->per_port) {
183 		err = __team_option_inst_add(team, option, NULL);
184 		if (err)
185 			goto inst_del_option;
186 	}
187 
188 	list_for_each_entry(port, &team->port_list, list) {
189 		err = __team_option_inst_add(team, option, port);
190 		if (err)
191 			goto inst_del_option;
192 	}
193 	return 0;
194 
195 inst_del_option:
196 	__team_option_inst_del_option(team, option);
197 	return err;
198 }
199 
200 static void __team_option_inst_mark_removed_option(struct team *team,
201 						   struct team_option *option)
202 {
203 	struct team_option_inst *opt_inst;
204 
205 	list_for_each_entry(opt_inst, &team->option_inst_list, list) {
206 		if (opt_inst->option == option) {
207 			opt_inst->changed = true;
208 			opt_inst->removed = true;
209 		}
210 	}
211 }
212 
213 static void __team_option_inst_del_port(struct team *team,
214 					struct team_port *port)
215 {
216 	struct team_option_inst *opt_inst, *tmp;
217 
218 	list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
219 		if (opt_inst->option->per_port &&
220 		    opt_inst->info.port == port)
221 			__team_option_inst_del(opt_inst);
222 	}
223 }
224 
225 static int __team_option_inst_add_port(struct team *team,
226 				       struct team_port *port)
227 {
228 	struct team_option *option;
229 	int err;
230 
231 	list_for_each_entry(option, &team->option_list, list) {
232 		if (!option->per_port)
233 			continue;
234 		err = __team_option_inst_add(team, option, port);
235 		if (err)
236 			goto inst_del_port;
237 	}
238 	return 0;
239 
240 inst_del_port:
241 	__team_option_inst_del_port(team, port);
242 	return err;
243 }
244 
245 static void __team_option_inst_mark_removed_port(struct team *team,
246 						 struct team_port *port)
247 {
248 	struct team_option_inst *opt_inst;
249 
250 	list_for_each_entry(opt_inst, &team->option_inst_list, list) {
251 		if (opt_inst->info.port == port) {
252 			opt_inst->changed = true;
253 			opt_inst->removed = true;
254 		}
255 	}
256 }
257 
258 static int __team_options_register(struct team *team,
259 				   const struct team_option *option,
260 				   size_t option_count)
261 {
262 	int i;
263 	struct team_option **dst_opts;
264 	int err;
265 
266 	dst_opts = kzalloc(sizeof(struct team_option *) * option_count,
267 			   GFP_KERNEL);
268 	if (!dst_opts)
269 		return -ENOMEM;
270 	for (i = 0; i < option_count; i++, option++) {
271 		if (__team_find_option(team, option->name)) {
272 			err = -EEXIST;
273 			goto alloc_rollback;
274 		}
275 		dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
276 		if (!dst_opts[i]) {
277 			err = -ENOMEM;
278 			goto alloc_rollback;
279 		}
280 	}
281 
282 	for (i = 0; i < option_count; i++) {
283 		err = __team_option_inst_add_option(team, dst_opts[i]);
284 		if (err)
285 			goto inst_rollback;
286 		list_add_tail(&dst_opts[i]->list, &team->option_list);
287 	}
288 
289 	kfree(dst_opts);
290 	return 0;
291 
292 inst_rollback:
293 	for (i--; i >= 0; i--)
294 		__team_option_inst_del_option(team, dst_opts[i]);
295 
296 	i = option_count - 1;
297 alloc_rollback:
298 	for (i--; i >= 0; i--)
299 		kfree(dst_opts[i]);
300 
301 	kfree(dst_opts);
302 	return err;
303 }
304 
305 static void __team_options_mark_removed(struct team *team,
306 					const struct team_option *option,
307 					size_t option_count)
308 {
309 	int i;
310 
311 	for (i = 0; i < option_count; i++, option++) {
312 		struct team_option *del_opt;
313 
314 		del_opt = __team_find_option(team, option->name);
315 		if (del_opt)
316 			__team_option_inst_mark_removed_option(team, del_opt);
317 	}
318 }
319 
320 static void __team_options_unregister(struct team *team,
321 				      const struct team_option *option,
322 				      size_t option_count)
323 {
324 	int i;
325 
326 	for (i = 0; i < option_count; i++, option++) {
327 		struct team_option *del_opt;
328 
329 		del_opt = __team_find_option(team, option->name);
330 		if (del_opt) {
331 			__team_option_inst_del_option(team, del_opt);
332 			list_del(&del_opt->list);
333 			kfree(del_opt);
334 		}
335 	}
336 }
337 
338 static void __team_options_change_check(struct team *team);
339 
340 int team_options_register(struct team *team,
341 			  const struct team_option *option,
342 			  size_t option_count)
343 {
344 	int err;
345 
346 	err = __team_options_register(team, option, option_count);
347 	if (err)
348 		return err;
349 	__team_options_change_check(team);
350 	return 0;
351 }
352 EXPORT_SYMBOL(team_options_register);
353 
354 void team_options_unregister(struct team *team,
355 			     const struct team_option *option,
356 			     size_t option_count)
357 {
358 	__team_options_mark_removed(team, option, option_count);
359 	__team_options_change_check(team);
360 	__team_options_unregister(team, option, option_count);
361 }
362 EXPORT_SYMBOL(team_options_unregister);
363 
364 static int team_option_get(struct team *team,
365 			   struct team_option_inst *opt_inst,
366 			   struct team_gsetter_ctx *ctx)
367 {
368 	if (!opt_inst->option->getter)
369 		return -EOPNOTSUPP;
370 	return opt_inst->option->getter(team, ctx);
371 }
372 
373 static int team_option_set(struct team *team,
374 			   struct team_option_inst *opt_inst,
375 			   struct team_gsetter_ctx *ctx)
376 {
377 	if (!opt_inst->option->setter)
378 		return -EOPNOTSUPP;
379 	return opt_inst->option->setter(team, ctx);
380 }
381 
382 void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info)
383 {
384 	struct team_option_inst *opt_inst;
385 
386 	opt_inst = container_of(opt_inst_info, struct team_option_inst, info);
387 	opt_inst->changed = true;
388 }
389 EXPORT_SYMBOL(team_option_inst_set_change);
390 
391 void team_options_change_check(struct team *team)
392 {
393 	__team_options_change_check(team);
394 }
395 EXPORT_SYMBOL(team_options_change_check);
396 
397 
398 /****************
399  * Mode handling
400  ****************/
401 
402 static LIST_HEAD(mode_list);
403 static DEFINE_SPINLOCK(mode_list_lock);
404 
405 struct team_mode_item {
406 	struct list_head list;
407 	const struct team_mode *mode;
408 };
409 
410 static struct team_mode_item *__find_mode(const char *kind)
411 {
412 	struct team_mode_item *mitem;
413 
414 	list_for_each_entry(mitem, &mode_list, list) {
415 		if (strcmp(mitem->mode->kind, kind) == 0)
416 			return mitem;
417 	}
418 	return NULL;
419 }
420 
421 static bool is_good_mode_name(const char *name)
422 {
423 	while (*name != '\0') {
424 		if (!isalpha(*name) && !isdigit(*name) && *name != '_')
425 			return false;
426 		name++;
427 	}
428 	return true;
429 }
430 
431 int team_mode_register(const struct team_mode *mode)
432 {
433 	int err = 0;
434 	struct team_mode_item *mitem;
435 
436 	if (!is_good_mode_name(mode->kind) ||
437 	    mode->priv_size > TEAM_MODE_PRIV_SIZE)
438 		return -EINVAL;
439 
440 	mitem = kmalloc(sizeof(*mitem), GFP_KERNEL);
441 	if (!mitem)
442 		return -ENOMEM;
443 
444 	spin_lock(&mode_list_lock);
445 	if (__find_mode(mode->kind)) {
446 		err = -EEXIST;
447 		kfree(mitem);
448 		goto unlock;
449 	}
450 	mitem->mode = mode;
451 	list_add_tail(&mitem->list, &mode_list);
452 unlock:
453 	spin_unlock(&mode_list_lock);
454 	return err;
455 }
456 EXPORT_SYMBOL(team_mode_register);
457 
458 void team_mode_unregister(const struct team_mode *mode)
459 {
460 	struct team_mode_item *mitem;
461 
462 	spin_lock(&mode_list_lock);
463 	mitem = __find_mode(mode->kind);
464 	if (mitem) {
465 		list_del_init(&mitem->list);
466 		kfree(mitem);
467 	}
468 	spin_unlock(&mode_list_lock);
469 }
470 EXPORT_SYMBOL(team_mode_unregister);
471 
472 static const struct team_mode *team_mode_get(const char *kind)
473 {
474 	struct team_mode_item *mitem;
475 	const struct team_mode *mode = NULL;
476 
477 	spin_lock(&mode_list_lock);
478 	mitem = __find_mode(kind);
479 	if (!mitem) {
480 		spin_unlock(&mode_list_lock);
481 		request_module("team-mode-%s", kind);
482 		spin_lock(&mode_list_lock);
483 		mitem = __find_mode(kind);
484 	}
485 	if (mitem) {
486 		mode = mitem->mode;
487 		if (!try_module_get(mode->owner))
488 			mode = NULL;
489 	}
490 
491 	spin_unlock(&mode_list_lock);
492 	return mode;
493 }
494 
495 static void team_mode_put(const struct team_mode *mode)
496 {
497 	module_put(mode->owner);
498 }
499 
500 static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
501 {
502 	dev_kfree_skb_any(skb);
503 	return false;
504 }
505 
506 static rx_handler_result_t team_dummy_receive(struct team *team,
507 					      struct team_port *port,
508 					      struct sk_buff *skb)
509 {
510 	return RX_HANDLER_ANOTHER;
511 }
512 
513 static const struct team_mode __team_no_mode = {
514 	.kind		= "*NOMODE*",
515 };
516 
517 static bool team_is_mode_set(struct team *team)
518 {
519 	return team->mode != &__team_no_mode;
520 }
521 
522 static void team_set_no_mode(struct team *team)
523 {
524 	team->user_carrier_enabled = false;
525 	team->mode = &__team_no_mode;
526 }
527 
528 static void team_adjust_ops(struct team *team)
529 {
530 	/*
531 	 * To avoid checks in rx/tx skb paths, ensure here that non-null and
532 	 * correct ops are always set.
533 	 */
534 
535 	if (!team->en_port_count || !team_is_mode_set(team) ||
536 	    !team->mode->ops->transmit)
537 		team->ops.transmit = team_dummy_transmit;
538 	else
539 		team->ops.transmit = team->mode->ops->transmit;
540 
541 	if (!team->en_port_count || !team_is_mode_set(team) ||
542 	    !team->mode->ops->receive)
543 		team->ops.receive = team_dummy_receive;
544 	else
545 		team->ops.receive = team->mode->ops->receive;
546 }
547 
548 /*
549  * We can benefit from the fact that it's ensured no port is present
550  * at the time of mode change. Therefore no packets are in fly so there's no
551  * need to set mode operations in any special way.
552  */
553 static int __team_change_mode(struct team *team,
554 			      const struct team_mode *new_mode)
555 {
556 	/* Check if mode was previously set and do cleanup if so */
557 	if (team_is_mode_set(team)) {
558 		void (*exit_op)(struct team *team) = team->ops.exit;
559 
560 		/* Clear ops area so no callback is called any longer */
561 		memset(&team->ops, 0, sizeof(struct team_mode_ops));
562 		team_adjust_ops(team);
563 
564 		if (exit_op)
565 			exit_op(team);
566 		team_mode_put(team->mode);
567 		team_set_no_mode(team);
568 		/* zero private data area */
569 		memset(&team->mode_priv, 0,
570 		       sizeof(struct team) - offsetof(struct team, mode_priv));
571 	}
572 
573 	if (!new_mode)
574 		return 0;
575 
576 	if (new_mode->ops->init) {
577 		int err;
578 
579 		err = new_mode->ops->init(team);
580 		if (err)
581 			return err;
582 	}
583 
584 	team->mode = new_mode;
585 	memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
586 	team_adjust_ops(team);
587 
588 	return 0;
589 }
590 
591 static int team_change_mode(struct team *team, const char *kind)
592 {
593 	const struct team_mode *new_mode;
594 	struct net_device *dev = team->dev;
595 	int err;
596 
597 	if (!list_empty(&team->port_list)) {
598 		netdev_err(dev, "No ports can be present during mode change\n");
599 		return -EBUSY;
600 	}
601 
602 	if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) {
603 		netdev_err(dev, "Unable to change to the same mode the team is in\n");
604 		return -EINVAL;
605 	}
606 
607 	new_mode = team_mode_get(kind);
608 	if (!new_mode) {
609 		netdev_err(dev, "Mode \"%s\" not found\n", kind);
610 		return -EINVAL;
611 	}
612 
613 	err = __team_change_mode(team, new_mode);
614 	if (err) {
615 		netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
616 		team_mode_put(new_mode);
617 		return err;
618 	}
619 
620 	netdev_info(dev, "Mode changed to \"%s\"\n", kind);
621 	return 0;
622 }
623 
624 
625 /*********************
626  * Peers notification
627  *********************/
628 
629 static void team_notify_peers_work(struct work_struct *work)
630 {
631 	struct team *team;
632 
633 	team = container_of(work, struct team, notify_peers.dw.work);
634 
635 	if (!rtnl_trylock()) {
636 		schedule_delayed_work(&team->notify_peers.dw, 0);
637 		return;
638 	}
639 	call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, team->dev);
640 	rtnl_unlock();
641 	if (!atomic_dec_and_test(&team->notify_peers.count_pending))
642 		schedule_delayed_work(&team->notify_peers.dw,
643 				      msecs_to_jiffies(team->notify_peers.interval));
644 }
645 
646 static void team_notify_peers(struct team *team)
647 {
648 	if (!team->notify_peers.count || !netif_running(team->dev))
649 		return;
650 	atomic_set(&team->notify_peers.count_pending, team->notify_peers.count);
651 	schedule_delayed_work(&team->notify_peers.dw, 0);
652 }
653 
654 static void team_notify_peers_init(struct team *team)
655 {
656 	INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work);
657 }
658 
659 static void team_notify_peers_fini(struct team *team)
660 {
661 	cancel_delayed_work_sync(&team->notify_peers.dw);
662 }
663 
664 
665 /*******************************
666  * Send multicast group rejoins
667  *******************************/
668 
669 static void team_mcast_rejoin_work(struct work_struct *work)
670 {
671 	struct team *team;
672 
673 	team = container_of(work, struct team, mcast_rejoin.dw.work);
674 
675 	if (!rtnl_trylock()) {
676 		schedule_delayed_work(&team->mcast_rejoin.dw, 0);
677 		return;
678 	}
679 	call_netdevice_notifiers(NETDEV_RESEND_IGMP, team->dev);
680 	rtnl_unlock();
681 	if (!atomic_dec_and_test(&team->mcast_rejoin.count_pending))
682 		schedule_delayed_work(&team->mcast_rejoin.dw,
683 				      msecs_to_jiffies(team->mcast_rejoin.interval));
684 }
685 
686 static void team_mcast_rejoin(struct team *team)
687 {
688 	if (!team->mcast_rejoin.count || !netif_running(team->dev))
689 		return;
690 	atomic_set(&team->mcast_rejoin.count_pending, team->mcast_rejoin.count);
691 	schedule_delayed_work(&team->mcast_rejoin.dw, 0);
692 }
693 
694 static void team_mcast_rejoin_init(struct team *team)
695 {
696 	INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work);
697 }
698 
699 static void team_mcast_rejoin_fini(struct team *team)
700 {
701 	cancel_delayed_work_sync(&team->mcast_rejoin.dw);
702 }
703 
704 
705 /************************
706  * Rx path frame handler
707  ************************/
708 
709 /* note: already called with rcu_read_lock */
710 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
711 {
712 	struct sk_buff *skb = *pskb;
713 	struct team_port *port;
714 	struct team *team;
715 	rx_handler_result_t res;
716 
717 	skb = skb_share_check(skb, GFP_ATOMIC);
718 	if (!skb)
719 		return RX_HANDLER_CONSUMED;
720 
721 	*pskb = skb;
722 
723 	port = team_port_get_rcu(skb->dev);
724 	team = port->team;
725 	if (!team_port_enabled(port)) {
726 		/* allow exact match delivery for disabled ports */
727 		res = RX_HANDLER_EXACT;
728 	} else {
729 		res = team->ops.receive(team, port, skb);
730 	}
731 	if (res == RX_HANDLER_ANOTHER) {
732 		struct team_pcpu_stats *pcpu_stats;
733 
734 		pcpu_stats = this_cpu_ptr(team->pcpu_stats);
735 		u64_stats_update_begin(&pcpu_stats->syncp);
736 		pcpu_stats->rx_packets++;
737 		pcpu_stats->rx_bytes += skb->len;
738 		if (skb->pkt_type == PACKET_MULTICAST)
739 			pcpu_stats->rx_multicast++;
740 		u64_stats_update_end(&pcpu_stats->syncp);
741 
742 		skb->dev = team->dev;
743 	} else {
744 		this_cpu_inc(team->pcpu_stats->rx_dropped);
745 	}
746 
747 	return res;
748 }
749 
750 
751 /*************************************
752  * Multiqueue Tx port select override
753  *************************************/
754 
755 static int team_queue_override_init(struct team *team)
756 {
757 	struct list_head *listarr;
758 	unsigned int queue_cnt = team->dev->num_tx_queues - 1;
759 	unsigned int i;
760 
761 	if (!queue_cnt)
762 		return 0;
763 	listarr = kmalloc(sizeof(struct list_head) * queue_cnt, GFP_KERNEL);
764 	if (!listarr)
765 		return -ENOMEM;
766 	team->qom_lists = listarr;
767 	for (i = 0; i < queue_cnt; i++)
768 		INIT_LIST_HEAD(listarr++);
769 	return 0;
770 }
771 
772 static void team_queue_override_fini(struct team *team)
773 {
774 	kfree(team->qom_lists);
775 }
776 
777 static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
778 {
779 	return &team->qom_lists[queue_id - 1];
780 }
781 
782 /*
783  * note: already called with rcu_read_lock
784  */
785 static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
786 {
787 	struct list_head *qom_list;
788 	struct team_port *port;
789 
790 	if (!team->queue_override_enabled || !skb->queue_mapping)
791 		return false;
792 	qom_list = __team_get_qom_list(team, skb->queue_mapping);
793 	list_for_each_entry_rcu(port, qom_list, qom_list) {
794 		if (!team_dev_queue_xmit(team, port, skb))
795 			return true;
796 	}
797 	return false;
798 }
799 
800 static void __team_queue_override_port_del(struct team *team,
801 					   struct team_port *port)
802 {
803 	if (!port->queue_id)
804 		return;
805 	list_del_rcu(&port->qom_list);
806 }
807 
808 static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
809 						      struct team_port *cur)
810 {
811 	if (port->priority < cur->priority)
812 		return true;
813 	if (port->priority > cur->priority)
814 		return false;
815 	if (port->index < cur->index)
816 		return true;
817 	return false;
818 }
819 
820 static void __team_queue_override_port_add(struct team *team,
821 					   struct team_port *port)
822 {
823 	struct team_port *cur;
824 	struct list_head *qom_list;
825 	struct list_head *node;
826 
827 	if (!port->queue_id)
828 		return;
829 	qom_list = __team_get_qom_list(team, port->queue_id);
830 	node = qom_list;
831 	list_for_each_entry(cur, qom_list, qom_list) {
832 		if (team_queue_override_port_has_gt_prio_than(port, cur))
833 			break;
834 		node = &cur->qom_list;
835 	}
836 	list_add_tail_rcu(&port->qom_list, node);
837 }
838 
839 static void __team_queue_override_enabled_check(struct team *team)
840 {
841 	struct team_port *port;
842 	bool enabled = false;
843 
844 	list_for_each_entry(port, &team->port_list, list) {
845 		if (port->queue_id) {
846 			enabled = true;
847 			break;
848 		}
849 	}
850 	if (enabled == team->queue_override_enabled)
851 		return;
852 	netdev_dbg(team->dev, "%s queue override\n",
853 		   enabled ? "Enabling" : "Disabling");
854 	team->queue_override_enabled = enabled;
855 }
856 
857 static void team_queue_override_port_prio_changed(struct team *team,
858 						  struct team_port *port)
859 {
860 	if (!port->queue_id || team_port_enabled(port))
861 		return;
862 	__team_queue_override_port_del(team, port);
863 	__team_queue_override_port_add(team, port);
864 	__team_queue_override_enabled_check(team);
865 }
866 
867 static void team_queue_override_port_change_queue_id(struct team *team,
868 						     struct team_port *port,
869 						     u16 new_queue_id)
870 {
871 	if (team_port_enabled(port)) {
872 		__team_queue_override_port_del(team, port);
873 		port->queue_id = new_queue_id;
874 		__team_queue_override_port_add(team, port);
875 		__team_queue_override_enabled_check(team);
876 	} else {
877 		port->queue_id = new_queue_id;
878 	}
879 }
880 
881 static void team_queue_override_port_add(struct team *team,
882 					 struct team_port *port)
883 {
884 	__team_queue_override_port_add(team, port);
885 	__team_queue_override_enabled_check(team);
886 }
887 
888 static void team_queue_override_port_del(struct team *team,
889 					 struct team_port *port)
890 {
891 	__team_queue_override_port_del(team, port);
892 	__team_queue_override_enabled_check(team);
893 }
894 
895 
896 /****************
897  * Port handling
898  ****************/
899 
900 static bool team_port_find(const struct team *team,
901 			   const struct team_port *port)
902 {
903 	struct team_port *cur;
904 
905 	list_for_each_entry(cur, &team->port_list, list)
906 		if (cur == port)
907 			return true;
908 	return false;
909 }
910 
911 /*
912  * Enable/disable port by adding to enabled port hashlist and setting
913  * port->index (Might be racy so reader could see incorrect ifindex when
914  * processing a flying packet, but that is not a problem). Write guarded
915  * by team->lock.
916  */
917 static void team_port_enable(struct team *team,
918 			     struct team_port *port)
919 {
920 	if (team_port_enabled(port))
921 		return;
922 	port->index = team->en_port_count++;
923 	hlist_add_head_rcu(&port->hlist,
924 			   team_port_index_hash(team, port->index));
925 	team_adjust_ops(team);
926 	team_queue_override_port_add(team, port);
927 	if (team->ops.port_enabled)
928 		team->ops.port_enabled(team, port);
929 	team_notify_peers(team);
930 	team_mcast_rejoin(team);
931 }
932 
933 static void __reconstruct_port_hlist(struct team *team, int rm_index)
934 {
935 	int i;
936 	struct team_port *port;
937 
938 	for (i = rm_index + 1; i < team->en_port_count; i++) {
939 		port = team_get_port_by_index(team, i);
940 		hlist_del_rcu(&port->hlist);
941 		port->index--;
942 		hlist_add_head_rcu(&port->hlist,
943 				   team_port_index_hash(team, port->index));
944 	}
945 }
946 
947 static void team_port_disable(struct team *team,
948 			      struct team_port *port)
949 {
950 	if (!team_port_enabled(port))
951 		return;
952 	if (team->ops.port_disabled)
953 		team->ops.port_disabled(team, port);
954 	hlist_del_rcu(&port->hlist);
955 	__reconstruct_port_hlist(team, port->index);
956 	port->index = -1;
957 	team->en_port_count--;
958 	team_queue_override_port_del(team, port);
959 	team_adjust_ops(team);
960 	team_notify_peers(team);
961 	team_mcast_rejoin(team);
962 }
963 
964 #define TEAM_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \
965 			    NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
966 			    NETIF_F_HIGHDMA | NETIF_F_LRO)
967 
968 static void __team_compute_features(struct team *team)
969 {
970 	struct team_port *port;
971 	u32 vlan_features = TEAM_VLAN_FEATURES;
972 	unsigned short max_hard_header_len = ETH_HLEN;
973 	unsigned int flags, dst_release_flag = IFF_XMIT_DST_RELEASE;
974 
975 	list_for_each_entry(port, &team->port_list, list) {
976 		vlan_features = netdev_increment_features(vlan_features,
977 					port->dev->vlan_features,
978 					TEAM_VLAN_FEATURES);
979 
980 		dst_release_flag &= port->dev->priv_flags;
981 		if (port->dev->hard_header_len > max_hard_header_len)
982 			max_hard_header_len = port->dev->hard_header_len;
983 	}
984 
985 	team->dev->vlan_features = vlan_features;
986 	team->dev->hard_header_len = max_hard_header_len;
987 
988 	flags = team->dev->priv_flags & ~IFF_XMIT_DST_RELEASE;
989 	team->dev->priv_flags = flags | dst_release_flag;
990 
991 	netdev_change_features(team->dev);
992 }
993 
994 static void team_compute_features(struct team *team)
995 {
996 	mutex_lock(&team->lock);
997 	__team_compute_features(team);
998 	mutex_unlock(&team->lock);
999 }
1000 
1001 static int team_port_enter(struct team *team, struct team_port *port)
1002 {
1003 	int err = 0;
1004 
1005 	dev_hold(team->dev);
1006 	port->dev->priv_flags |= IFF_TEAM_PORT;
1007 	if (team->ops.port_enter) {
1008 		err = team->ops.port_enter(team, port);
1009 		if (err) {
1010 			netdev_err(team->dev, "Device %s failed to enter team mode\n",
1011 				   port->dev->name);
1012 			goto err_port_enter;
1013 		}
1014 	}
1015 
1016 	return 0;
1017 
1018 err_port_enter:
1019 	port->dev->priv_flags &= ~IFF_TEAM_PORT;
1020 	dev_put(team->dev);
1021 
1022 	return err;
1023 }
1024 
1025 static void team_port_leave(struct team *team, struct team_port *port)
1026 {
1027 	if (team->ops.port_leave)
1028 		team->ops.port_leave(team, port);
1029 	port->dev->priv_flags &= ~IFF_TEAM_PORT;
1030 	dev_put(team->dev);
1031 }
1032 
1033 #ifdef CONFIG_NET_POLL_CONTROLLER
1034 static int team_port_enable_netpoll(struct team *team, struct team_port *port)
1035 {
1036 	struct netpoll *np;
1037 	int err;
1038 
1039 	if (!team->dev->npinfo)
1040 		return 0;
1041 
1042 	np = kzalloc(sizeof(*np), GFP_KERNEL);
1043 	if (!np)
1044 		return -ENOMEM;
1045 
1046 	err = __netpoll_setup(np, port->dev);
1047 	if (err) {
1048 		kfree(np);
1049 		return err;
1050 	}
1051 	port->np = np;
1052 	return err;
1053 }
1054 
1055 static void team_port_disable_netpoll(struct team_port *port)
1056 {
1057 	struct netpoll *np = port->np;
1058 
1059 	if (!np)
1060 		return;
1061 	port->np = NULL;
1062 
1063 	/* Wait for transmitting packets to finish before freeing. */
1064 	synchronize_rcu_bh();
1065 	__netpoll_cleanup(np);
1066 	kfree(np);
1067 }
1068 #else
1069 static int team_port_enable_netpoll(struct team *team, struct team_port *port)
1070 {
1071 	return 0;
1072 }
1073 static void team_port_disable_netpoll(struct team_port *port)
1074 {
1075 }
1076 #endif
1077 
1078 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1079 static int team_dev_type_check_change(struct net_device *dev,
1080 				      struct net_device *port_dev);
1081 
1082 static int team_port_add(struct team *team, struct net_device *port_dev)
1083 {
1084 	struct net_device *dev = team->dev;
1085 	struct team_port *port;
1086 	char *portname = port_dev->name;
1087 	int err;
1088 
1089 	if (port_dev->flags & IFF_LOOPBACK) {
1090 		netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1091 			   portname);
1092 		return -EINVAL;
1093 	}
1094 
1095 	if (team_port_exists(port_dev)) {
1096 		netdev_err(dev, "Device %s is already a port "
1097 				"of a team device\n", portname);
1098 		return -EBUSY;
1099 	}
1100 
1101 	if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1102 	    vlan_uses_dev(dev)) {
1103 		netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1104 			   portname);
1105 		return -EPERM;
1106 	}
1107 
1108 	err = team_dev_type_check_change(dev, port_dev);
1109 	if (err)
1110 		return err;
1111 
1112 	if (port_dev->flags & IFF_UP) {
1113 		netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1114 			   portname);
1115 		return -EBUSY;
1116 	}
1117 
1118 	port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1119 		       GFP_KERNEL);
1120 	if (!port)
1121 		return -ENOMEM;
1122 
1123 	port->dev = port_dev;
1124 	port->team = team;
1125 	INIT_LIST_HEAD(&port->qom_list);
1126 
1127 	port->orig.mtu = port_dev->mtu;
1128 	err = dev_set_mtu(port_dev, dev->mtu);
1129 	if (err) {
1130 		netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1131 		goto err_set_mtu;
1132 	}
1133 
1134 	memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1135 
1136 	err = team_port_enter(team, port);
1137 	if (err) {
1138 		netdev_err(dev, "Device %s failed to enter team mode\n",
1139 			   portname);
1140 		goto err_port_enter;
1141 	}
1142 
1143 	err = dev_open(port_dev);
1144 	if (err) {
1145 		netdev_dbg(dev, "Device %s opening failed\n",
1146 			   portname);
1147 		goto err_dev_open;
1148 	}
1149 
1150 	err = vlan_vids_add_by_dev(port_dev, dev);
1151 	if (err) {
1152 		netdev_err(dev, "Failed to add vlan ids to device %s\n",
1153 				portname);
1154 		goto err_vids_add;
1155 	}
1156 
1157 	err = team_port_enable_netpoll(team, port);
1158 	if (err) {
1159 		netdev_err(dev, "Failed to enable netpoll on device %s\n",
1160 			   portname);
1161 		goto err_enable_netpoll;
1162 	}
1163 
1164 	err = netdev_master_upper_dev_link(port_dev, dev);
1165 	if (err) {
1166 		netdev_err(dev, "Device %s failed to set upper link\n",
1167 			   portname);
1168 		goto err_set_upper_link;
1169 	}
1170 
1171 	err = netdev_rx_handler_register(port_dev, team_handle_frame,
1172 					 port);
1173 	if (err) {
1174 		netdev_err(dev, "Device %s failed to register rx_handler\n",
1175 			   portname);
1176 		goto err_handler_register;
1177 	}
1178 
1179 	err = __team_option_inst_add_port(team, port);
1180 	if (err) {
1181 		netdev_err(dev, "Device %s failed to add per-port options\n",
1182 			   portname);
1183 		goto err_option_port_add;
1184 	}
1185 
1186 	port->index = -1;
1187 	list_add_tail_rcu(&port->list, &team->port_list);
1188 	team_port_enable(team, port);
1189 	__team_compute_features(team);
1190 	__team_port_change_port_added(port, !!netif_carrier_ok(port_dev));
1191 	__team_options_change_check(team);
1192 
1193 	netdev_info(dev, "Port device %s added\n", portname);
1194 
1195 	return 0;
1196 
1197 err_option_port_add:
1198 	netdev_rx_handler_unregister(port_dev);
1199 
1200 err_handler_register:
1201 	netdev_upper_dev_unlink(port_dev, dev);
1202 
1203 err_set_upper_link:
1204 	team_port_disable_netpoll(port);
1205 
1206 err_enable_netpoll:
1207 	vlan_vids_del_by_dev(port_dev, dev);
1208 
1209 err_vids_add:
1210 	dev_close(port_dev);
1211 
1212 err_dev_open:
1213 	team_port_leave(team, port);
1214 	team_port_set_orig_dev_addr(port);
1215 
1216 err_port_enter:
1217 	dev_set_mtu(port_dev, port->orig.mtu);
1218 
1219 err_set_mtu:
1220 	kfree(port);
1221 
1222 	return err;
1223 }
1224 
1225 static void __team_port_change_port_removed(struct team_port *port);
1226 
1227 static int team_port_del(struct team *team, struct net_device *port_dev)
1228 {
1229 	struct net_device *dev = team->dev;
1230 	struct team_port *port;
1231 	char *portname = port_dev->name;
1232 
1233 	port = team_port_get_rtnl(port_dev);
1234 	if (!port || !team_port_find(team, port)) {
1235 		netdev_err(dev, "Device %s does not act as a port of this team\n",
1236 			   portname);
1237 		return -ENOENT;
1238 	}
1239 
1240 	team_port_disable(team, port);
1241 	list_del_rcu(&port->list);
1242 	netdev_rx_handler_unregister(port_dev);
1243 	netdev_upper_dev_unlink(port_dev, dev);
1244 	team_port_disable_netpoll(port);
1245 	vlan_vids_del_by_dev(port_dev, dev);
1246 	dev_uc_unsync(port_dev, dev);
1247 	dev_mc_unsync(port_dev, dev);
1248 	dev_close(port_dev);
1249 	team_port_leave(team, port);
1250 
1251 	__team_option_inst_mark_removed_port(team, port);
1252 	__team_options_change_check(team);
1253 	__team_option_inst_del_port(team, port);
1254 	__team_port_change_port_removed(port);
1255 
1256 	team_port_set_orig_dev_addr(port);
1257 	dev_set_mtu(port_dev, port->orig.mtu);
1258 	kfree_rcu(port, rcu);
1259 	netdev_info(dev, "Port device %s removed\n", portname);
1260 	__team_compute_features(team);
1261 
1262 	return 0;
1263 }
1264 
1265 
1266 /*****************
1267  * Net device ops
1268  *****************/
1269 
1270 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1271 {
1272 	ctx->data.str_val = team->mode->kind;
1273 	return 0;
1274 }
1275 
1276 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1277 {
1278 	return team_change_mode(team, ctx->data.str_val);
1279 }
1280 
1281 static int team_notify_peers_count_get(struct team *team,
1282 				       struct team_gsetter_ctx *ctx)
1283 {
1284 	ctx->data.u32_val = team->notify_peers.count;
1285 	return 0;
1286 }
1287 
1288 static int team_notify_peers_count_set(struct team *team,
1289 				       struct team_gsetter_ctx *ctx)
1290 {
1291 	team->notify_peers.count = ctx->data.u32_val;
1292 	return 0;
1293 }
1294 
1295 static int team_notify_peers_interval_get(struct team *team,
1296 					  struct team_gsetter_ctx *ctx)
1297 {
1298 	ctx->data.u32_val = team->notify_peers.interval;
1299 	return 0;
1300 }
1301 
1302 static int team_notify_peers_interval_set(struct team *team,
1303 					  struct team_gsetter_ctx *ctx)
1304 {
1305 	team->notify_peers.interval = ctx->data.u32_val;
1306 	return 0;
1307 }
1308 
1309 static int team_mcast_rejoin_count_get(struct team *team,
1310 				       struct team_gsetter_ctx *ctx)
1311 {
1312 	ctx->data.u32_val = team->mcast_rejoin.count;
1313 	return 0;
1314 }
1315 
1316 static int team_mcast_rejoin_count_set(struct team *team,
1317 				       struct team_gsetter_ctx *ctx)
1318 {
1319 	team->mcast_rejoin.count = ctx->data.u32_val;
1320 	return 0;
1321 }
1322 
1323 static int team_mcast_rejoin_interval_get(struct team *team,
1324 					  struct team_gsetter_ctx *ctx)
1325 {
1326 	ctx->data.u32_val = team->mcast_rejoin.interval;
1327 	return 0;
1328 }
1329 
1330 static int team_mcast_rejoin_interval_set(struct team *team,
1331 					  struct team_gsetter_ctx *ctx)
1332 {
1333 	team->mcast_rejoin.interval = ctx->data.u32_val;
1334 	return 0;
1335 }
1336 
1337 static int team_port_en_option_get(struct team *team,
1338 				   struct team_gsetter_ctx *ctx)
1339 {
1340 	struct team_port *port = ctx->info->port;
1341 
1342 	ctx->data.bool_val = team_port_enabled(port);
1343 	return 0;
1344 }
1345 
1346 static int team_port_en_option_set(struct team *team,
1347 				   struct team_gsetter_ctx *ctx)
1348 {
1349 	struct team_port *port = ctx->info->port;
1350 
1351 	if (ctx->data.bool_val)
1352 		team_port_enable(team, port);
1353 	else
1354 		team_port_disable(team, port);
1355 	return 0;
1356 }
1357 
1358 static int team_user_linkup_option_get(struct team *team,
1359 				       struct team_gsetter_ctx *ctx)
1360 {
1361 	struct team_port *port = ctx->info->port;
1362 
1363 	ctx->data.bool_val = port->user.linkup;
1364 	return 0;
1365 }
1366 
1367 static void __team_carrier_check(struct team *team);
1368 
1369 static int team_user_linkup_option_set(struct team *team,
1370 				       struct team_gsetter_ctx *ctx)
1371 {
1372 	struct team_port *port = ctx->info->port;
1373 
1374 	port->user.linkup = ctx->data.bool_val;
1375 	team_refresh_port_linkup(port);
1376 	__team_carrier_check(port->team);
1377 	return 0;
1378 }
1379 
1380 static int team_user_linkup_en_option_get(struct team *team,
1381 					  struct team_gsetter_ctx *ctx)
1382 {
1383 	struct team_port *port = ctx->info->port;
1384 
1385 	ctx->data.bool_val = port->user.linkup_enabled;
1386 	return 0;
1387 }
1388 
1389 static int team_user_linkup_en_option_set(struct team *team,
1390 					  struct team_gsetter_ctx *ctx)
1391 {
1392 	struct team_port *port = ctx->info->port;
1393 
1394 	port->user.linkup_enabled = ctx->data.bool_val;
1395 	team_refresh_port_linkup(port);
1396 	__team_carrier_check(port->team);
1397 	return 0;
1398 }
1399 
1400 static int team_priority_option_get(struct team *team,
1401 				    struct team_gsetter_ctx *ctx)
1402 {
1403 	struct team_port *port = ctx->info->port;
1404 
1405 	ctx->data.s32_val = port->priority;
1406 	return 0;
1407 }
1408 
1409 static int team_priority_option_set(struct team *team,
1410 				    struct team_gsetter_ctx *ctx)
1411 {
1412 	struct team_port *port = ctx->info->port;
1413 	s32 priority = ctx->data.s32_val;
1414 
1415 	if (port->priority == priority)
1416 		return 0;
1417 	port->priority = priority;
1418 	team_queue_override_port_prio_changed(team, port);
1419 	return 0;
1420 }
1421 
1422 static int team_queue_id_option_get(struct team *team,
1423 				    struct team_gsetter_ctx *ctx)
1424 {
1425 	struct team_port *port = ctx->info->port;
1426 
1427 	ctx->data.u32_val = port->queue_id;
1428 	return 0;
1429 }
1430 
1431 static int team_queue_id_option_set(struct team *team,
1432 				    struct team_gsetter_ctx *ctx)
1433 {
1434 	struct team_port *port = ctx->info->port;
1435 	u16 new_queue_id = ctx->data.u32_val;
1436 
1437 	if (port->queue_id == new_queue_id)
1438 		return 0;
1439 	if (new_queue_id >= team->dev->real_num_tx_queues)
1440 		return -EINVAL;
1441 	team_queue_override_port_change_queue_id(team, port, new_queue_id);
1442 	return 0;
1443 }
1444 
1445 static const struct team_option team_options[] = {
1446 	{
1447 		.name = "mode",
1448 		.type = TEAM_OPTION_TYPE_STRING,
1449 		.getter = team_mode_option_get,
1450 		.setter = team_mode_option_set,
1451 	},
1452 	{
1453 		.name = "notify_peers_count",
1454 		.type = TEAM_OPTION_TYPE_U32,
1455 		.getter = team_notify_peers_count_get,
1456 		.setter = team_notify_peers_count_set,
1457 	},
1458 	{
1459 		.name = "notify_peers_interval",
1460 		.type = TEAM_OPTION_TYPE_U32,
1461 		.getter = team_notify_peers_interval_get,
1462 		.setter = team_notify_peers_interval_set,
1463 	},
1464 	{
1465 		.name = "mcast_rejoin_count",
1466 		.type = TEAM_OPTION_TYPE_U32,
1467 		.getter = team_mcast_rejoin_count_get,
1468 		.setter = team_mcast_rejoin_count_set,
1469 	},
1470 	{
1471 		.name = "mcast_rejoin_interval",
1472 		.type = TEAM_OPTION_TYPE_U32,
1473 		.getter = team_mcast_rejoin_interval_get,
1474 		.setter = team_mcast_rejoin_interval_set,
1475 	},
1476 	{
1477 		.name = "enabled",
1478 		.type = TEAM_OPTION_TYPE_BOOL,
1479 		.per_port = true,
1480 		.getter = team_port_en_option_get,
1481 		.setter = team_port_en_option_set,
1482 	},
1483 	{
1484 		.name = "user_linkup",
1485 		.type = TEAM_OPTION_TYPE_BOOL,
1486 		.per_port = true,
1487 		.getter = team_user_linkup_option_get,
1488 		.setter = team_user_linkup_option_set,
1489 	},
1490 	{
1491 		.name = "user_linkup_enabled",
1492 		.type = TEAM_OPTION_TYPE_BOOL,
1493 		.per_port = true,
1494 		.getter = team_user_linkup_en_option_get,
1495 		.setter = team_user_linkup_en_option_set,
1496 	},
1497 	{
1498 		.name = "priority",
1499 		.type = TEAM_OPTION_TYPE_S32,
1500 		.per_port = true,
1501 		.getter = team_priority_option_get,
1502 		.setter = team_priority_option_set,
1503 	},
1504 	{
1505 		.name = "queue_id",
1506 		.type = TEAM_OPTION_TYPE_U32,
1507 		.per_port = true,
1508 		.getter = team_queue_id_option_get,
1509 		.setter = team_queue_id_option_set,
1510 	},
1511 };
1512 
1513 static struct lock_class_key team_netdev_xmit_lock_key;
1514 static struct lock_class_key team_netdev_addr_lock_key;
1515 static struct lock_class_key team_tx_busylock_key;
1516 
1517 static void team_set_lockdep_class_one(struct net_device *dev,
1518 				       struct netdev_queue *txq,
1519 				       void *unused)
1520 {
1521 	lockdep_set_class(&txq->_xmit_lock, &team_netdev_xmit_lock_key);
1522 }
1523 
1524 static void team_set_lockdep_class(struct net_device *dev)
1525 {
1526 	lockdep_set_class(&dev->addr_list_lock, &team_netdev_addr_lock_key);
1527 	netdev_for_each_tx_queue(dev, team_set_lockdep_class_one, NULL);
1528 	dev->qdisc_tx_busylock = &team_tx_busylock_key;
1529 }
1530 
1531 static int team_init(struct net_device *dev)
1532 {
1533 	struct team *team = netdev_priv(dev);
1534 	int i;
1535 	int err;
1536 
1537 	team->dev = dev;
1538 	mutex_init(&team->lock);
1539 	team_set_no_mode(team);
1540 
1541 	team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1542 	if (!team->pcpu_stats)
1543 		return -ENOMEM;
1544 
1545 	for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1546 		INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1547 	INIT_LIST_HEAD(&team->port_list);
1548 	err = team_queue_override_init(team);
1549 	if (err)
1550 		goto err_team_queue_override_init;
1551 
1552 	team_adjust_ops(team);
1553 
1554 	INIT_LIST_HEAD(&team->option_list);
1555 	INIT_LIST_HEAD(&team->option_inst_list);
1556 
1557 	team_notify_peers_init(team);
1558 	team_mcast_rejoin_init(team);
1559 
1560 	err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1561 	if (err)
1562 		goto err_options_register;
1563 	netif_carrier_off(dev);
1564 
1565 	team_set_lockdep_class(dev);
1566 
1567 	return 0;
1568 
1569 err_options_register:
1570 	team_mcast_rejoin_fini(team);
1571 	team_notify_peers_fini(team);
1572 	team_queue_override_fini(team);
1573 err_team_queue_override_init:
1574 	free_percpu(team->pcpu_stats);
1575 
1576 	return err;
1577 }
1578 
1579 static void team_uninit(struct net_device *dev)
1580 {
1581 	struct team *team = netdev_priv(dev);
1582 	struct team_port *port;
1583 	struct team_port *tmp;
1584 
1585 	mutex_lock(&team->lock);
1586 	list_for_each_entry_safe(port, tmp, &team->port_list, list)
1587 		team_port_del(team, port->dev);
1588 
1589 	__team_change_mode(team, NULL); /* cleanup */
1590 	__team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1591 	team_mcast_rejoin_fini(team);
1592 	team_notify_peers_fini(team);
1593 	team_queue_override_fini(team);
1594 	mutex_unlock(&team->lock);
1595 }
1596 
1597 static void team_destructor(struct net_device *dev)
1598 {
1599 	struct team *team = netdev_priv(dev);
1600 
1601 	free_percpu(team->pcpu_stats);
1602 	free_netdev(dev);
1603 }
1604 
1605 static int team_open(struct net_device *dev)
1606 {
1607 	return 0;
1608 }
1609 
1610 static int team_close(struct net_device *dev)
1611 {
1612 	return 0;
1613 }
1614 
1615 /*
1616  * note: already called with rcu_read_lock
1617  */
1618 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1619 {
1620 	struct team *team = netdev_priv(dev);
1621 	bool tx_success;
1622 	unsigned int len = skb->len;
1623 
1624 	tx_success = team_queue_override_transmit(team, skb);
1625 	if (!tx_success)
1626 		tx_success = team->ops.transmit(team, skb);
1627 	if (tx_success) {
1628 		struct team_pcpu_stats *pcpu_stats;
1629 
1630 		pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1631 		u64_stats_update_begin(&pcpu_stats->syncp);
1632 		pcpu_stats->tx_packets++;
1633 		pcpu_stats->tx_bytes += len;
1634 		u64_stats_update_end(&pcpu_stats->syncp);
1635 	} else {
1636 		this_cpu_inc(team->pcpu_stats->tx_dropped);
1637 	}
1638 
1639 	return NETDEV_TX_OK;
1640 }
1641 
1642 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1643 			     void *accel_priv, select_queue_fallback_t fallback)
1644 {
1645 	/*
1646 	 * This helper function exists to help dev_pick_tx get the correct
1647 	 * destination queue.  Using a helper function skips a call to
1648 	 * skb_tx_hash and will put the skbs in the queue we expect on their
1649 	 * way down to the team driver.
1650 	 */
1651 	u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1652 
1653 	/*
1654 	 * Save the original txq to restore before passing to the driver
1655 	 */
1656 	qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1657 
1658 	if (unlikely(txq >= dev->real_num_tx_queues)) {
1659 		do {
1660 			txq -= dev->real_num_tx_queues;
1661 		} while (txq >= dev->real_num_tx_queues);
1662 	}
1663 	return txq;
1664 }
1665 
1666 static void team_change_rx_flags(struct net_device *dev, int change)
1667 {
1668 	struct team *team = netdev_priv(dev);
1669 	struct team_port *port;
1670 	int inc;
1671 
1672 	rcu_read_lock();
1673 	list_for_each_entry_rcu(port, &team->port_list, list) {
1674 		if (change & IFF_PROMISC) {
1675 			inc = dev->flags & IFF_PROMISC ? 1 : -1;
1676 			dev_set_promiscuity(port->dev, inc);
1677 		}
1678 		if (change & IFF_ALLMULTI) {
1679 			inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1680 			dev_set_allmulti(port->dev, inc);
1681 		}
1682 	}
1683 	rcu_read_unlock();
1684 }
1685 
1686 static void team_set_rx_mode(struct net_device *dev)
1687 {
1688 	struct team *team = netdev_priv(dev);
1689 	struct team_port *port;
1690 
1691 	rcu_read_lock();
1692 	list_for_each_entry_rcu(port, &team->port_list, list) {
1693 		dev_uc_sync_multiple(port->dev, dev);
1694 		dev_mc_sync_multiple(port->dev, dev);
1695 	}
1696 	rcu_read_unlock();
1697 }
1698 
1699 static int team_set_mac_address(struct net_device *dev, void *p)
1700 {
1701 	struct sockaddr *addr = p;
1702 	struct team *team = netdev_priv(dev);
1703 	struct team_port *port;
1704 
1705 	if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1706 		return -EADDRNOTAVAIL;
1707 	memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1708 	rcu_read_lock();
1709 	list_for_each_entry_rcu(port, &team->port_list, list)
1710 		if (team->ops.port_change_dev_addr)
1711 			team->ops.port_change_dev_addr(team, port);
1712 	rcu_read_unlock();
1713 	return 0;
1714 }
1715 
1716 static int team_change_mtu(struct net_device *dev, int new_mtu)
1717 {
1718 	struct team *team = netdev_priv(dev);
1719 	struct team_port *port;
1720 	int err;
1721 
1722 	/*
1723 	 * Alhough this is reader, it's guarded by team lock. It's not possible
1724 	 * to traverse list in reverse under rcu_read_lock
1725 	 */
1726 	mutex_lock(&team->lock);
1727 	list_for_each_entry(port, &team->port_list, list) {
1728 		err = dev_set_mtu(port->dev, new_mtu);
1729 		if (err) {
1730 			netdev_err(dev, "Device %s failed to change mtu",
1731 				   port->dev->name);
1732 			goto unwind;
1733 		}
1734 	}
1735 	mutex_unlock(&team->lock);
1736 
1737 	dev->mtu = new_mtu;
1738 
1739 	return 0;
1740 
1741 unwind:
1742 	list_for_each_entry_continue_reverse(port, &team->port_list, list)
1743 		dev_set_mtu(port->dev, dev->mtu);
1744 	mutex_unlock(&team->lock);
1745 
1746 	return err;
1747 }
1748 
1749 static struct rtnl_link_stats64 *
1750 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1751 {
1752 	struct team *team = netdev_priv(dev);
1753 	struct team_pcpu_stats *p;
1754 	u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1755 	u32 rx_dropped = 0, tx_dropped = 0;
1756 	unsigned int start;
1757 	int i;
1758 
1759 	for_each_possible_cpu(i) {
1760 		p = per_cpu_ptr(team->pcpu_stats, i);
1761 		do {
1762 			start = u64_stats_fetch_begin_irq(&p->syncp);
1763 			rx_packets	= p->rx_packets;
1764 			rx_bytes	= p->rx_bytes;
1765 			rx_multicast	= p->rx_multicast;
1766 			tx_packets	= p->tx_packets;
1767 			tx_bytes	= p->tx_bytes;
1768 		} while (u64_stats_fetch_retry_irq(&p->syncp, start));
1769 
1770 		stats->rx_packets	+= rx_packets;
1771 		stats->rx_bytes		+= rx_bytes;
1772 		stats->multicast	+= rx_multicast;
1773 		stats->tx_packets	+= tx_packets;
1774 		stats->tx_bytes		+= tx_bytes;
1775 		/*
1776 		 * rx_dropped & tx_dropped are u32, updated
1777 		 * without syncp protection.
1778 		 */
1779 		rx_dropped	+= p->rx_dropped;
1780 		tx_dropped	+= p->tx_dropped;
1781 	}
1782 	stats->rx_dropped	= rx_dropped;
1783 	stats->tx_dropped	= tx_dropped;
1784 	return stats;
1785 }
1786 
1787 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1788 {
1789 	struct team *team = netdev_priv(dev);
1790 	struct team_port *port;
1791 	int err;
1792 
1793 	/*
1794 	 * Alhough this is reader, it's guarded by team lock. It's not possible
1795 	 * to traverse list in reverse under rcu_read_lock
1796 	 */
1797 	mutex_lock(&team->lock);
1798 	list_for_each_entry(port, &team->port_list, list) {
1799 		err = vlan_vid_add(port->dev, proto, vid);
1800 		if (err)
1801 			goto unwind;
1802 	}
1803 	mutex_unlock(&team->lock);
1804 
1805 	return 0;
1806 
1807 unwind:
1808 	list_for_each_entry_continue_reverse(port, &team->port_list, list)
1809 		vlan_vid_del(port->dev, proto, vid);
1810 	mutex_unlock(&team->lock);
1811 
1812 	return err;
1813 }
1814 
1815 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1816 {
1817 	struct team *team = netdev_priv(dev);
1818 	struct team_port *port;
1819 
1820 	rcu_read_lock();
1821 	list_for_each_entry_rcu(port, &team->port_list, list)
1822 		vlan_vid_del(port->dev, proto, vid);
1823 	rcu_read_unlock();
1824 
1825 	return 0;
1826 }
1827 
1828 #ifdef CONFIG_NET_POLL_CONTROLLER
1829 static void team_poll_controller(struct net_device *dev)
1830 {
1831 }
1832 
1833 static void __team_netpoll_cleanup(struct team *team)
1834 {
1835 	struct team_port *port;
1836 
1837 	list_for_each_entry(port, &team->port_list, list)
1838 		team_port_disable_netpoll(port);
1839 }
1840 
1841 static void team_netpoll_cleanup(struct net_device *dev)
1842 {
1843 	struct team *team = netdev_priv(dev);
1844 
1845 	mutex_lock(&team->lock);
1846 	__team_netpoll_cleanup(team);
1847 	mutex_unlock(&team->lock);
1848 }
1849 
1850 static int team_netpoll_setup(struct net_device *dev,
1851 			      struct netpoll_info *npifo)
1852 {
1853 	struct team *team = netdev_priv(dev);
1854 	struct team_port *port;
1855 	int err = 0;
1856 
1857 	mutex_lock(&team->lock);
1858 	list_for_each_entry(port, &team->port_list, list) {
1859 		err = team_port_enable_netpoll(team, port);
1860 		if (err) {
1861 			__team_netpoll_cleanup(team);
1862 			break;
1863 		}
1864 	}
1865 	mutex_unlock(&team->lock);
1866 	return err;
1867 }
1868 #endif
1869 
1870 static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
1871 {
1872 	struct team *team = netdev_priv(dev);
1873 	int err;
1874 
1875 	mutex_lock(&team->lock);
1876 	err = team_port_add(team, port_dev);
1877 	mutex_unlock(&team->lock);
1878 	return err;
1879 }
1880 
1881 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1882 {
1883 	struct team *team = netdev_priv(dev);
1884 	int err;
1885 
1886 	mutex_lock(&team->lock);
1887 	err = team_port_del(team, port_dev);
1888 	mutex_unlock(&team->lock);
1889 	return err;
1890 }
1891 
1892 static netdev_features_t team_fix_features(struct net_device *dev,
1893 					   netdev_features_t features)
1894 {
1895 	struct team_port *port;
1896 	struct team *team = netdev_priv(dev);
1897 	netdev_features_t mask;
1898 
1899 	mask = features;
1900 	features &= ~NETIF_F_ONE_FOR_ALL;
1901 	features |= NETIF_F_ALL_FOR_ALL;
1902 
1903 	rcu_read_lock();
1904 	list_for_each_entry_rcu(port, &team->port_list, list) {
1905 		features = netdev_increment_features(features,
1906 						     port->dev->features,
1907 						     mask);
1908 	}
1909 	rcu_read_unlock();
1910 	return features;
1911 }
1912 
1913 static int team_change_carrier(struct net_device *dev, bool new_carrier)
1914 {
1915 	struct team *team = netdev_priv(dev);
1916 
1917 	team->user_carrier_enabled = true;
1918 
1919 	if (new_carrier)
1920 		netif_carrier_on(dev);
1921 	else
1922 		netif_carrier_off(dev);
1923 	return 0;
1924 }
1925 
1926 static const struct net_device_ops team_netdev_ops = {
1927 	.ndo_init		= team_init,
1928 	.ndo_uninit		= team_uninit,
1929 	.ndo_open		= team_open,
1930 	.ndo_stop		= team_close,
1931 	.ndo_start_xmit		= team_xmit,
1932 	.ndo_select_queue	= team_select_queue,
1933 	.ndo_change_rx_flags	= team_change_rx_flags,
1934 	.ndo_set_rx_mode	= team_set_rx_mode,
1935 	.ndo_set_mac_address	= team_set_mac_address,
1936 	.ndo_change_mtu		= team_change_mtu,
1937 	.ndo_get_stats64	= team_get_stats64,
1938 	.ndo_vlan_rx_add_vid	= team_vlan_rx_add_vid,
1939 	.ndo_vlan_rx_kill_vid	= team_vlan_rx_kill_vid,
1940 #ifdef CONFIG_NET_POLL_CONTROLLER
1941 	.ndo_poll_controller	= team_poll_controller,
1942 	.ndo_netpoll_setup	= team_netpoll_setup,
1943 	.ndo_netpoll_cleanup	= team_netpoll_cleanup,
1944 #endif
1945 	.ndo_add_slave		= team_add_slave,
1946 	.ndo_del_slave		= team_del_slave,
1947 	.ndo_fix_features	= team_fix_features,
1948 	.ndo_change_carrier     = team_change_carrier,
1949 };
1950 
1951 /***********************
1952  * ethtool interface
1953  ***********************/
1954 
1955 static void team_ethtool_get_drvinfo(struct net_device *dev,
1956 				     struct ethtool_drvinfo *drvinfo)
1957 {
1958 	strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
1959 	strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
1960 }
1961 
1962 static const struct ethtool_ops team_ethtool_ops = {
1963 	.get_drvinfo		= team_ethtool_get_drvinfo,
1964 	.get_link		= ethtool_op_get_link,
1965 };
1966 
1967 /***********************
1968  * rt netlink interface
1969  ***********************/
1970 
1971 static void team_setup_by_port(struct net_device *dev,
1972 			       struct net_device *port_dev)
1973 {
1974 	dev->header_ops	= port_dev->header_ops;
1975 	dev->type = port_dev->type;
1976 	dev->hard_header_len = port_dev->hard_header_len;
1977 	dev->addr_len = port_dev->addr_len;
1978 	dev->mtu = port_dev->mtu;
1979 	memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
1980 	eth_hw_addr_inherit(dev, port_dev);
1981 }
1982 
1983 static int team_dev_type_check_change(struct net_device *dev,
1984 				      struct net_device *port_dev)
1985 {
1986 	struct team *team = netdev_priv(dev);
1987 	char *portname = port_dev->name;
1988 	int err;
1989 
1990 	if (dev->type == port_dev->type)
1991 		return 0;
1992 	if (!list_empty(&team->port_list)) {
1993 		netdev_err(dev, "Device %s is of different type\n", portname);
1994 		return -EBUSY;
1995 	}
1996 	err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
1997 	err = notifier_to_errno(err);
1998 	if (err) {
1999 		netdev_err(dev, "Refused to change device type\n");
2000 		return err;
2001 	}
2002 	dev_uc_flush(dev);
2003 	dev_mc_flush(dev);
2004 	team_setup_by_port(dev, port_dev);
2005 	call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2006 	return 0;
2007 }
2008 
2009 static void team_setup(struct net_device *dev)
2010 {
2011 	ether_setup(dev);
2012 
2013 	dev->netdev_ops = &team_netdev_ops;
2014 	dev->ethtool_ops = &team_ethtool_ops;
2015 	dev->destructor	= team_destructor;
2016 	dev->tx_queue_len = 0;
2017 	dev->flags |= IFF_MULTICAST;
2018 	dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2019 
2020 	/*
2021 	 * Indicate we support unicast address filtering. That way core won't
2022 	 * bring us to promisc mode in case a unicast addr is added.
2023 	 * Let this up to underlay drivers.
2024 	 */
2025 	dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2026 
2027 	dev->features |= NETIF_F_LLTX;
2028 	dev->features |= NETIF_F_GRO;
2029 
2030 	/* Don't allow team devices to change network namespaces. */
2031 	dev->features |= NETIF_F_NETNS_LOCAL;
2032 
2033 	dev->hw_features = TEAM_VLAN_FEATURES |
2034 			   NETIF_F_HW_VLAN_CTAG_TX |
2035 			   NETIF_F_HW_VLAN_CTAG_RX |
2036 			   NETIF_F_HW_VLAN_CTAG_FILTER;
2037 
2038 	dev->hw_features &= ~(NETIF_F_ALL_CSUM & ~NETIF_F_HW_CSUM);
2039 	dev->features |= dev->hw_features;
2040 }
2041 
2042 static int team_newlink(struct net *src_net, struct net_device *dev,
2043 			struct nlattr *tb[], struct nlattr *data[])
2044 {
2045 	int err;
2046 
2047 	if (tb[IFLA_ADDRESS] == NULL)
2048 		eth_hw_addr_random(dev);
2049 
2050 	err = register_netdevice(dev);
2051 	if (err)
2052 		return err;
2053 
2054 	return 0;
2055 }
2056 
2057 static int team_validate(struct nlattr *tb[], struct nlattr *data[])
2058 {
2059 	if (tb[IFLA_ADDRESS]) {
2060 		if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2061 			return -EINVAL;
2062 		if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2063 			return -EADDRNOTAVAIL;
2064 	}
2065 	return 0;
2066 }
2067 
2068 static unsigned int team_get_num_tx_queues(void)
2069 {
2070 	return TEAM_DEFAULT_NUM_TX_QUEUES;
2071 }
2072 
2073 static unsigned int team_get_num_rx_queues(void)
2074 {
2075 	return TEAM_DEFAULT_NUM_RX_QUEUES;
2076 }
2077 
2078 static struct rtnl_link_ops team_link_ops __read_mostly = {
2079 	.kind			= DRV_NAME,
2080 	.priv_size		= sizeof(struct team),
2081 	.setup			= team_setup,
2082 	.newlink		= team_newlink,
2083 	.validate		= team_validate,
2084 	.get_num_tx_queues	= team_get_num_tx_queues,
2085 	.get_num_rx_queues	= team_get_num_rx_queues,
2086 };
2087 
2088 
2089 /***********************************
2090  * Generic netlink custom interface
2091  ***********************************/
2092 
2093 static struct genl_family team_nl_family = {
2094 	.id		= GENL_ID_GENERATE,
2095 	.name		= TEAM_GENL_NAME,
2096 	.version	= TEAM_GENL_VERSION,
2097 	.maxattr	= TEAM_ATTR_MAX,
2098 	.netnsok	= true,
2099 };
2100 
2101 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2102 	[TEAM_ATTR_UNSPEC]			= { .type = NLA_UNSPEC, },
2103 	[TEAM_ATTR_TEAM_IFINDEX]		= { .type = NLA_U32 },
2104 	[TEAM_ATTR_LIST_OPTION]			= { .type = NLA_NESTED },
2105 	[TEAM_ATTR_LIST_PORT]			= { .type = NLA_NESTED },
2106 };
2107 
2108 static const struct nla_policy
2109 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2110 	[TEAM_ATTR_OPTION_UNSPEC]		= { .type = NLA_UNSPEC, },
2111 	[TEAM_ATTR_OPTION_NAME] = {
2112 		.type = NLA_STRING,
2113 		.len = TEAM_STRING_MAX_LEN,
2114 	},
2115 	[TEAM_ATTR_OPTION_CHANGED]		= { .type = NLA_FLAG },
2116 	[TEAM_ATTR_OPTION_TYPE]			= { .type = NLA_U8 },
2117 	[TEAM_ATTR_OPTION_DATA]			= { .type = NLA_BINARY },
2118 };
2119 
2120 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2121 {
2122 	struct sk_buff *msg;
2123 	void *hdr;
2124 	int err;
2125 
2126 	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2127 	if (!msg)
2128 		return -ENOMEM;
2129 
2130 	hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2131 			  &team_nl_family, 0, TEAM_CMD_NOOP);
2132 	if (!hdr) {
2133 		err = -EMSGSIZE;
2134 		goto err_msg_put;
2135 	}
2136 
2137 	genlmsg_end(msg, hdr);
2138 
2139 	return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2140 
2141 err_msg_put:
2142 	nlmsg_free(msg);
2143 
2144 	return err;
2145 }
2146 
2147 /*
2148  * Netlink cmd functions should be locked by following two functions.
2149  * Since dev gets held here, that ensures dev won't disappear in between.
2150  */
2151 static struct team *team_nl_team_get(struct genl_info *info)
2152 {
2153 	struct net *net = genl_info_net(info);
2154 	int ifindex;
2155 	struct net_device *dev;
2156 	struct team *team;
2157 
2158 	if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2159 		return NULL;
2160 
2161 	ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2162 	dev = dev_get_by_index(net, ifindex);
2163 	if (!dev || dev->netdev_ops != &team_netdev_ops) {
2164 		if (dev)
2165 			dev_put(dev);
2166 		return NULL;
2167 	}
2168 
2169 	team = netdev_priv(dev);
2170 	mutex_lock(&team->lock);
2171 	return team;
2172 }
2173 
2174 static void team_nl_team_put(struct team *team)
2175 {
2176 	mutex_unlock(&team->lock);
2177 	dev_put(team->dev);
2178 }
2179 
2180 typedef int team_nl_send_func_t(struct sk_buff *skb,
2181 				struct team *team, u32 portid);
2182 
2183 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2184 {
2185 	return genlmsg_unicast(dev_net(team->dev), skb, portid);
2186 }
2187 
2188 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2189 				       struct team_option_inst *opt_inst)
2190 {
2191 	struct nlattr *option_item;
2192 	struct team_option *option = opt_inst->option;
2193 	struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2194 	struct team_gsetter_ctx ctx;
2195 	int err;
2196 
2197 	ctx.info = opt_inst_info;
2198 	err = team_option_get(team, opt_inst, &ctx);
2199 	if (err)
2200 		return err;
2201 
2202 	option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
2203 	if (!option_item)
2204 		return -EMSGSIZE;
2205 
2206 	if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2207 		goto nest_cancel;
2208 	if (opt_inst_info->port &&
2209 	    nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2210 			opt_inst_info->port->dev->ifindex))
2211 		goto nest_cancel;
2212 	if (opt_inst->option->array_size &&
2213 	    nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2214 			opt_inst_info->array_index))
2215 		goto nest_cancel;
2216 
2217 	switch (option->type) {
2218 	case TEAM_OPTION_TYPE_U32:
2219 		if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2220 			goto nest_cancel;
2221 		if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2222 			goto nest_cancel;
2223 		break;
2224 	case TEAM_OPTION_TYPE_STRING:
2225 		if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2226 			goto nest_cancel;
2227 		if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2228 				   ctx.data.str_val))
2229 			goto nest_cancel;
2230 		break;
2231 	case TEAM_OPTION_TYPE_BINARY:
2232 		if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2233 			goto nest_cancel;
2234 		if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2235 			    ctx.data.bin_val.ptr))
2236 			goto nest_cancel;
2237 		break;
2238 	case TEAM_OPTION_TYPE_BOOL:
2239 		if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2240 			goto nest_cancel;
2241 		if (ctx.data.bool_val &&
2242 		    nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2243 			goto nest_cancel;
2244 		break;
2245 	case TEAM_OPTION_TYPE_S32:
2246 		if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2247 			goto nest_cancel;
2248 		if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2249 			goto nest_cancel;
2250 		break;
2251 	default:
2252 		BUG();
2253 	}
2254 	if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2255 		goto nest_cancel;
2256 	if (opt_inst->changed) {
2257 		if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2258 			goto nest_cancel;
2259 		opt_inst->changed = false;
2260 	}
2261 	nla_nest_end(skb, option_item);
2262 	return 0;
2263 
2264 nest_cancel:
2265 	nla_nest_cancel(skb, option_item);
2266 	return -EMSGSIZE;
2267 }
2268 
2269 static int __send_and_alloc_skb(struct sk_buff **pskb,
2270 				struct team *team, u32 portid,
2271 				team_nl_send_func_t *send_func)
2272 {
2273 	int err;
2274 
2275 	if (*pskb) {
2276 		err = send_func(*pskb, team, portid);
2277 		if (err)
2278 			return err;
2279 	}
2280 	*pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2281 	if (!*pskb)
2282 		return -ENOMEM;
2283 	return 0;
2284 }
2285 
2286 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2287 				    int flags, team_nl_send_func_t *send_func,
2288 				    struct list_head *sel_opt_inst_list)
2289 {
2290 	struct nlattr *option_list;
2291 	struct nlmsghdr *nlh;
2292 	void *hdr;
2293 	struct team_option_inst *opt_inst;
2294 	int err;
2295 	struct sk_buff *skb = NULL;
2296 	bool incomplete;
2297 	int i;
2298 
2299 	opt_inst = list_first_entry(sel_opt_inst_list,
2300 				    struct team_option_inst, tmp_list);
2301 
2302 start_again:
2303 	err = __send_and_alloc_skb(&skb, team, portid, send_func);
2304 	if (err)
2305 		return err;
2306 
2307 	hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2308 			  TEAM_CMD_OPTIONS_GET);
2309 	if (!hdr)
2310 		return -EMSGSIZE;
2311 
2312 	if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2313 		goto nla_put_failure;
2314 	option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2315 	if (!option_list)
2316 		goto nla_put_failure;
2317 
2318 	i = 0;
2319 	incomplete = false;
2320 	list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2321 		err = team_nl_fill_one_option_get(skb, team, opt_inst);
2322 		if (err) {
2323 			if (err == -EMSGSIZE) {
2324 				if (!i)
2325 					goto errout;
2326 				incomplete = true;
2327 				break;
2328 			}
2329 			goto errout;
2330 		}
2331 		i++;
2332 	}
2333 
2334 	nla_nest_end(skb, option_list);
2335 	genlmsg_end(skb, hdr);
2336 	if (incomplete)
2337 		goto start_again;
2338 
2339 send_done:
2340 	nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2341 	if (!nlh) {
2342 		err = __send_and_alloc_skb(&skb, team, portid, send_func);
2343 		if (err)
2344 			goto errout;
2345 		goto send_done;
2346 	}
2347 
2348 	return send_func(skb, team, portid);
2349 
2350 nla_put_failure:
2351 	err = -EMSGSIZE;
2352 errout:
2353 	genlmsg_cancel(skb, hdr);
2354 	nlmsg_free(skb);
2355 	return err;
2356 }
2357 
2358 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2359 {
2360 	struct team *team;
2361 	struct team_option_inst *opt_inst;
2362 	int err;
2363 	LIST_HEAD(sel_opt_inst_list);
2364 
2365 	team = team_nl_team_get(info);
2366 	if (!team)
2367 		return -EINVAL;
2368 
2369 	list_for_each_entry(opt_inst, &team->option_inst_list, list)
2370 		list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2371 	err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2372 				       NLM_F_ACK, team_nl_send_unicast,
2373 				       &sel_opt_inst_list);
2374 
2375 	team_nl_team_put(team);
2376 
2377 	return err;
2378 }
2379 
2380 static int team_nl_send_event_options_get(struct team *team,
2381 					  struct list_head *sel_opt_inst_list);
2382 
2383 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2384 {
2385 	struct team *team;
2386 	int err = 0;
2387 	int i;
2388 	struct nlattr *nl_option;
2389 	LIST_HEAD(opt_inst_list);
2390 
2391 	team = team_nl_team_get(info);
2392 	if (!team)
2393 		return -EINVAL;
2394 
2395 	err = -EINVAL;
2396 	if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2397 		err = -EINVAL;
2398 		goto team_put;
2399 	}
2400 
2401 	nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2402 		struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2403 		struct nlattr *attr;
2404 		struct nlattr *attr_data;
2405 		enum team_option_type opt_type;
2406 		int opt_port_ifindex = 0; /* != 0 for per-port options */
2407 		u32 opt_array_index = 0;
2408 		bool opt_is_array = false;
2409 		struct team_option_inst *opt_inst;
2410 		char *opt_name;
2411 		bool opt_found = false;
2412 
2413 		if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2414 			err = -EINVAL;
2415 			goto team_put;
2416 		}
2417 		err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2418 				       nl_option, team_nl_option_policy);
2419 		if (err)
2420 			goto team_put;
2421 		if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2422 		    !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2423 			err = -EINVAL;
2424 			goto team_put;
2425 		}
2426 		switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2427 		case NLA_U32:
2428 			opt_type = TEAM_OPTION_TYPE_U32;
2429 			break;
2430 		case NLA_STRING:
2431 			opt_type = TEAM_OPTION_TYPE_STRING;
2432 			break;
2433 		case NLA_BINARY:
2434 			opt_type = TEAM_OPTION_TYPE_BINARY;
2435 			break;
2436 		case NLA_FLAG:
2437 			opt_type = TEAM_OPTION_TYPE_BOOL;
2438 			break;
2439 		case NLA_S32:
2440 			opt_type = TEAM_OPTION_TYPE_S32;
2441 			break;
2442 		default:
2443 			goto team_put;
2444 		}
2445 
2446 		attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2447 		if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2448 			err = -EINVAL;
2449 			goto team_put;
2450 		}
2451 
2452 		opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2453 		attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2454 		if (attr)
2455 			opt_port_ifindex = nla_get_u32(attr);
2456 
2457 		attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2458 		if (attr) {
2459 			opt_is_array = true;
2460 			opt_array_index = nla_get_u32(attr);
2461 		}
2462 
2463 		list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2464 			struct team_option *option = opt_inst->option;
2465 			struct team_gsetter_ctx ctx;
2466 			struct team_option_inst_info *opt_inst_info;
2467 			int tmp_ifindex;
2468 
2469 			opt_inst_info = &opt_inst->info;
2470 			tmp_ifindex = opt_inst_info->port ?
2471 				      opt_inst_info->port->dev->ifindex : 0;
2472 			if (option->type != opt_type ||
2473 			    strcmp(option->name, opt_name) ||
2474 			    tmp_ifindex != opt_port_ifindex ||
2475 			    (option->array_size && !opt_is_array) ||
2476 			    opt_inst_info->array_index != opt_array_index)
2477 				continue;
2478 			opt_found = true;
2479 			ctx.info = opt_inst_info;
2480 			switch (opt_type) {
2481 			case TEAM_OPTION_TYPE_U32:
2482 				ctx.data.u32_val = nla_get_u32(attr_data);
2483 				break;
2484 			case TEAM_OPTION_TYPE_STRING:
2485 				if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2486 					err = -EINVAL;
2487 					goto team_put;
2488 				}
2489 				ctx.data.str_val = nla_data(attr_data);
2490 				break;
2491 			case TEAM_OPTION_TYPE_BINARY:
2492 				ctx.data.bin_val.len = nla_len(attr_data);
2493 				ctx.data.bin_val.ptr = nla_data(attr_data);
2494 				break;
2495 			case TEAM_OPTION_TYPE_BOOL:
2496 				ctx.data.bool_val = attr_data ? true : false;
2497 				break;
2498 			case TEAM_OPTION_TYPE_S32:
2499 				ctx.data.s32_val = nla_get_s32(attr_data);
2500 				break;
2501 			default:
2502 				BUG();
2503 			}
2504 			err = team_option_set(team, opt_inst, &ctx);
2505 			if (err)
2506 				goto team_put;
2507 			opt_inst->changed = true;
2508 			list_add(&opt_inst->tmp_list, &opt_inst_list);
2509 		}
2510 		if (!opt_found) {
2511 			err = -ENOENT;
2512 			goto team_put;
2513 		}
2514 	}
2515 
2516 	err = team_nl_send_event_options_get(team, &opt_inst_list);
2517 
2518 team_put:
2519 	team_nl_team_put(team);
2520 
2521 	return err;
2522 }
2523 
2524 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2525 				     struct team_port *port)
2526 {
2527 	struct nlattr *port_item;
2528 
2529 	port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2530 	if (!port_item)
2531 		goto nest_cancel;
2532 	if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2533 		goto nest_cancel;
2534 	if (port->changed) {
2535 		if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2536 			goto nest_cancel;
2537 		port->changed = false;
2538 	}
2539 	if ((port->removed &&
2540 	     nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2541 	    (port->state.linkup &&
2542 	     nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2543 	    nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2544 	    nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2545 		goto nest_cancel;
2546 	nla_nest_end(skb, port_item);
2547 	return 0;
2548 
2549 nest_cancel:
2550 	nla_nest_cancel(skb, port_item);
2551 	return -EMSGSIZE;
2552 }
2553 
2554 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2555 				      int flags, team_nl_send_func_t *send_func,
2556 				      struct team_port *one_port)
2557 {
2558 	struct nlattr *port_list;
2559 	struct nlmsghdr *nlh;
2560 	void *hdr;
2561 	struct team_port *port;
2562 	int err;
2563 	struct sk_buff *skb = NULL;
2564 	bool incomplete;
2565 	int i;
2566 
2567 	port = list_first_entry_or_null(&team->port_list,
2568 					struct team_port, list);
2569 
2570 start_again:
2571 	err = __send_and_alloc_skb(&skb, team, portid, send_func);
2572 	if (err)
2573 		return err;
2574 
2575 	hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2576 			  TEAM_CMD_PORT_LIST_GET);
2577 	if (!hdr)
2578 		return -EMSGSIZE;
2579 
2580 	if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2581 		goto nla_put_failure;
2582 	port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2583 	if (!port_list)
2584 		goto nla_put_failure;
2585 
2586 	i = 0;
2587 	incomplete = false;
2588 
2589 	/* If one port is selected, called wants to send port list containing
2590 	 * only this port. Otherwise go through all listed ports and send all
2591 	 */
2592 	if (one_port) {
2593 		err = team_nl_fill_one_port_get(skb, one_port);
2594 		if (err)
2595 			goto errout;
2596 	} else if (port) {
2597 		list_for_each_entry_from(port, &team->port_list, list) {
2598 			err = team_nl_fill_one_port_get(skb, port);
2599 			if (err) {
2600 				if (err == -EMSGSIZE) {
2601 					if (!i)
2602 						goto errout;
2603 					incomplete = true;
2604 					break;
2605 				}
2606 				goto errout;
2607 			}
2608 			i++;
2609 		}
2610 	}
2611 
2612 	nla_nest_end(skb, port_list);
2613 	genlmsg_end(skb, hdr);
2614 	if (incomplete)
2615 		goto start_again;
2616 
2617 send_done:
2618 	nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2619 	if (!nlh) {
2620 		err = __send_and_alloc_skb(&skb, team, portid, send_func);
2621 		if (err)
2622 			goto errout;
2623 		goto send_done;
2624 	}
2625 
2626 	return send_func(skb, team, portid);
2627 
2628 nla_put_failure:
2629 	err = -EMSGSIZE;
2630 errout:
2631 	genlmsg_cancel(skb, hdr);
2632 	nlmsg_free(skb);
2633 	return err;
2634 }
2635 
2636 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2637 				     struct genl_info *info)
2638 {
2639 	struct team *team;
2640 	int err;
2641 
2642 	team = team_nl_team_get(info);
2643 	if (!team)
2644 		return -EINVAL;
2645 
2646 	err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2647 					 NLM_F_ACK, team_nl_send_unicast, NULL);
2648 
2649 	team_nl_team_put(team);
2650 
2651 	return err;
2652 }
2653 
2654 static const struct genl_ops team_nl_ops[] = {
2655 	{
2656 		.cmd = TEAM_CMD_NOOP,
2657 		.doit = team_nl_cmd_noop,
2658 		.policy = team_nl_policy,
2659 	},
2660 	{
2661 		.cmd = TEAM_CMD_OPTIONS_SET,
2662 		.doit = team_nl_cmd_options_set,
2663 		.policy = team_nl_policy,
2664 		.flags = GENL_ADMIN_PERM,
2665 	},
2666 	{
2667 		.cmd = TEAM_CMD_OPTIONS_GET,
2668 		.doit = team_nl_cmd_options_get,
2669 		.policy = team_nl_policy,
2670 		.flags = GENL_ADMIN_PERM,
2671 	},
2672 	{
2673 		.cmd = TEAM_CMD_PORT_LIST_GET,
2674 		.doit = team_nl_cmd_port_list_get,
2675 		.policy = team_nl_policy,
2676 		.flags = GENL_ADMIN_PERM,
2677 	},
2678 };
2679 
2680 static const struct genl_multicast_group team_nl_mcgrps[] = {
2681 	{ .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2682 };
2683 
2684 static int team_nl_send_multicast(struct sk_buff *skb,
2685 				  struct team *team, u32 portid)
2686 {
2687 	return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2688 				       skb, 0, 0, GFP_KERNEL);
2689 }
2690 
2691 static int team_nl_send_event_options_get(struct team *team,
2692 					  struct list_head *sel_opt_inst_list)
2693 {
2694 	return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2695 					sel_opt_inst_list);
2696 }
2697 
2698 static int team_nl_send_event_port_get(struct team *team,
2699 				       struct team_port *port)
2700 {
2701 	return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2702 					  port);
2703 }
2704 
2705 static int team_nl_init(void)
2706 {
2707 	return genl_register_family_with_ops_groups(&team_nl_family, team_nl_ops,
2708 						    team_nl_mcgrps);
2709 }
2710 
2711 static void team_nl_fini(void)
2712 {
2713 	genl_unregister_family(&team_nl_family);
2714 }
2715 
2716 
2717 /******************
2718  * Change checkers
2719  ******************/
2720 
2721 static void __team_options_change_check(struct team *team)
2722 {
2723 	int err;
2724 	struct team_option_inst *opt_inst;
2725 	LIST_HEAD(sel_opt_inst_list);
2726 
2727 	list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2728 		if (opt_inst->changed)
2729 			list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2730 	}
2731 	err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2732 	if (err && err != -ESRCH)
2733 		netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2734 			    err);
2735 }
2736 
2737 /* rtnl lock is held */
2738 
2739 static void __team_port_change_send(struct team_port *port, bool linkup)
2740 {
2741 	int err;
2742 
2743 	port->changed = true;
2744 	port->state.linkup = linkup;
2745 	team_refresh_port_linkup(port);
2746 	if (linkup) {
2747 		struct ethtool_cmd ecmd;
2748 
2749 		err = __ethtool_get_settings(port->dev, &ecmd);
2750 		if (!err) {
2751 			port->state.speed = ethtool_cmd_speed(&ecmd);
2752 			port->state.duplex = ecmd.duplex;
2753 			goto send_event;
2754 		}
2755 	}
2756 	port->state.speed = 0;
2757 	port->state.duplex = 0;
2758 
2759 send_event:
2760 	err = team_nl_send_event_port_get(port->team, port);
2761 	if (err && err != -ESRCH)
2762 		netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2763 			    port->dev->name, err);
2764 
2765 }
2766 
2767 static void __team_carrier_check(struct team *team)
2768 {
2769 	struct team_port *port;
2770 	bool team_linkup;
2771 
2772 	if (team->user_carrier_enabled)
2773 		return;
2774 
2775 	team_linkup = false;
2776 	list_for_each_entry(port, &team->port_list, list) {
2777 		if (port->linkup) {
2778 			team_linkup = true;
2779 			break;
2780 		}
2781 	}
2782 
2783 	if (team_linkup)
2784 		netif_carrier_on(team->dev);
2785 	else
2786 		netif_carrier_off(team->dev);
2787 }
2788 
2789 static void __team_port_change_check(struct team_port *port, bool linkup)
2790 {
2791 	if (port->state.linkup != linkup)
2792 		__team_port_change_send(port, linkup);
2793 	__team_carrier_check(port->team);
2794 }
2795 
2796 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2797 {
2798 	__team_port_change_send(port, linkup);
2799 	__team_carrier_check(port->team);
2800 }
2801 
2802 static void __team_port_change_port_removed(struct team_port *port)
2803 {
2804 	port->removed = true;
2805 	__team_port_change_send(port, false);
2806 	__team_carrier_check(port->team);
2807 }
2808 
2809 static void team_port_change_check(struct team_port *port, bool linkup)
2810 {
2811 	struct team *team = port->team;
2812 
2813 	mutex_lock(&team->lock);
2814 	__team_port_change_check(port, linkup);
2815 	mutex_unlock(&team->lock);
2816 }
2817 
2818 
2819 /************************************
2820  * Net device notifier event handler
2821  ************************************/
2822 
2823 static int team_device_event(struct notifier_block *unused,
2824 			     unsigned long event, void *ptr)
2825 {
2826 	struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2827 	struct team_port *port;
2828 
2829 	port = team_port_get_rtnl(dev);
2830 	if (!port)
2831 		return NOTIFY_DONE;
2832 
2833 	switch (event) {
2834 	case NETDEV_UP:
2835 		if (netif_carrier_ok(dev))
2836 			team_port_change_check(port, true);
2837 	case NETDEV_DOWN:
2838 		team_port_change_check(port, false);
2839 	case NETDEV_CHANGE:
2840 		if (netif_running(port->dev))
2841 			team_port_change_check(port,
2842 					       !!netif_carrier_ok(port->dev));
2843 		break;
2844 	case NETDEV_UNREGISTER:
2845 		team_del_slave(port->team->dev, dev);
2846 		break;
2847 	case NETDEV_FEAT_CHANGE:
2848 		team_compute_features(port->team);
2849 		break;
2850 	case NETDEV_PRECHANGEMTU:
2851 		/* Forbid to change mtu of underlaying device */
2852 		return NOTIFY_BAD;
2853 	case NETDEV_PRE_TYPE_CHANGE:
2854 		/* Forbid to change type of underlaying device */
2855 		return NOTIFY_BAD;
2856 	case NETDEV_RESEND_IGMP:
2857 		/* Propagate to master device */
2858 		call_netdevice_notifiers(event, port->team->dev);
2859 		break;
2860 	}
2861 	return NOTIFY_DONE;
2862 }
2863 
2864 static struct notifier_block team_notifier_block __read_mostly = {
2865 	.notifier_call = team_device_event,
2866 };
2867 
2868 
2869 /***********************
2870  * Module init and exit
2871  ***********************/
2872 
2873 static int __init team_module_init(void)
2874 {
2875 	int err;
2876 
2877 	register_netdevice_notifier(&team_notifier_block);
2878 
2879 	err = rtnl_link_register(&team_link_ops);
2880 	if (err)
2881 		goto err_rtnl_reg;
2882 
2883 	err = team_nl_init();
2884 	if (err)
2885 		goto err_nl_init;
2886 
2887 	return 0;
2888 
2889 err_nl_init:
2890 	rtnl_link_unregister(&team_link_ops);
2891 
2892 err_rtnl_reg:
2893 	unregister_netdevice_notifier(&team_notifier_block);
2894 
2895 	return err;
2896 }
2897 
2898 static void __exit team_module_exit(void)
2899 {
2900 	team_nl_fini();
2901 	rtnl_link_unregister(&team_link_ops);
2902 	unregister_netdevice_notifier(&team_notifier_block);
2903 }
2904 
2905 module_init(team_module_init);
2906 module_exit(team_module_exit);
2907 
2908 MODULE_LICENSE("GPL v2");
2909 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
2910 MODULE_DESCRIPTION("Ethernet team device driver");
2911 MODULE_ALIAS_RTNL_LINK(DRV_NAME);
2912