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[mirror_ubuntu-bionic-kernel.git] / drivers / net / team / team.c
1 /*
2 * drivers/net/team/team.c - Network team device driver
3 * Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 */
10
11 #include <linux/kernel.h>
12 #include <linux/types.h>
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/slab.h>
16 #include <linux/rcupdate.h>
17 #include <linux/errno.h>
18 #include <linux/ctype.h>
19 #include <linux/notifier.h>
20 #include <linux/netdevice.h>
21 #include <linux/netpoll.h>
22 #include <linux/if_vlan.h>
23 #include <linux/if_arp.h>
24 #include <linux/socket.h>
25 #include <linux/etherdevice.h>
26 #include <linux/rtnetlink.h>
27 #include <net/rtnetlink.h>
28 #include <net/genetlink.h>
29 #include <net/netlink.h>
30 #include <net/sch_generic.h>
31 #include <net/switchdev.h>
32 #include <generated/utsrelease.h>
33 #include <linux/if_team.h>
34
35 #define DRV_NAME "team"
36
37
38 /**********
39 * Helpers
40 **********/
41
42 #define team_port_exists(dev) (dev->priv_flags & IFF_TEAM_PORT)
43
44 static struct team_port *team_port_get_rcu(const struct net_device *dev)
45 {
46 return rcu_dereference(dev->rx_handler_data);
47 }
48
49 static struct team_port *team_port_get_rtnl(const struct net_device *dev)
50 {
51 struct team_port *port = rtnl_dereference(dev->rx_handler_data);
52
53 return team_port_exists(dev) ? port : NULL;
54 }
55
56 /*
57 * Since the ability to change device address for open port device is tested in
58 * team_port_add, this function can be called without control of return value
59 */
60 static int __set_port_dev_addr(struct net_device *port_dev,
61 const unsigned char *dev_addr)
62 {
63 struct sockaddr addr;
64
65 memcpy(addr.sa_data, dev_addr, port_dev->addr_len);
66 addr.sa_family = port_dev->type;
67 return dev_set_mac_address(port_dev, &addr);
68 }
69
70 static int team_port_set_orig_dev_addr(struct team_port *port)
71 {
72 return __set_port_dev_addr(port->dev, port->orig.dev_addr);
73 }
74
75 static int team_port_set_team_dev_addr(struct team *team,
76 struct team_port *port)
77 {
78 return __set_port_dev_addr(port->dev, team->dev->dev_addr);
79 }
80
81 int team_modeop_port_enter(struct team *team, struct team_port *port)
82 {
83 return team_port_set_team_dev_addr(team, port);
84 }
85 EXPORT_SYMBOL(team_modeop_port_enter);
86
87 void team_modeop_port_change_dev_addr(struct team *team,
88 struct team_port *port)
89 {
90 team_port_set_team_dev_addr(team, port);
91 }
92 EXPORT_SYMBOL(team_modeop_port_change_dev_addr);
93
94 static void team_lower_state_changed(struct team_port *port)
95 {
96 struct netdev_lag_lower_state_info info;
97
98 info.link_up = port->linkup;
99 info.tx_enabled = team_port_enabled(port);
100 netdev_lower_state_changed(port->dev, &info);
101 }
102
103 static void team_refresh_port_linkup(struct team_port *port)
104 {
105 bool new_linkup = port->user.linkup_enabled ? port->user.linkup :
106 port->state.linkup;
107
108 if (port->linkup != new_linkup) {
109 port->linkup = new_linkup;
110 team_lower_state_changed(port);
111 }
112 }
113
114
115 /*******************
116 * Options handling
117 *******************/
118
119 struct team_option_inst { /* One for each option instance */
120 struct list_head list;
121 struct list_head tmp_list;
122 struct team_option *option;
123 struct team_option_inst_info info;
124 bool changed;
125 bool removed;
126 };
127
128 static struct team_option *__team_find_option(struct team *team,
129 const char *opt_name)
130 {
131 struct team_option *option;
132
133 list_for_each_entry(option, &team->option_list, list) {
134 if (strcmp(option->name, opt_name) == 0)
135 return option;
136 }
137 return NULL;
138 }
139
140 static void __team_option_inst_del(struct team_option_inst *opt_inst)
141 {
142 list_del(&opt_inst->list);
143 kfree(opt_inst);
144 }
145
146 static void __team_option_inst_del_option(struct team *team,
147 struct team_option *option)
148 {
149 struct team_option_inst *opt_inst, *tmp;
150
151 list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
152 if (opt_inst->option == option)
153 __team_option_inst_del(opt_inst);
154 }
155 }
156
157 static int __team_option_inst_add(struct team *team, struct team_option *option,
158 struct team_port *port)
159 {
160 struct team_option_inst *opt_inst;
161 unsigned int array_size;
162 unsigned int i;
163 int err;
164
165 array_size = option->array_size;
166 if (!array_size)
167 array_size = 1; /* No array but still need one instance */
168
169 for (i = 0; i < array_size; i++) {
170 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL);
171 if (!opt_inst)
172 return -ENOMEM;
173 opt_inst->option = option;
174 opt_inst->info.port = port;
175 opt_inst->info.array_index = i;
176 opt_inst->changed = true;
177 opt_inst->removed = false;
178 list_add_tail(&opt_inst->list, &team->option_inst_list);
179 if (option->init) {
180 err = option->init(team, &opt_inst->info);
181 if (err)
182 return err;
183 }
184
185 }
186 return 0;
187 }
188
189 static int __team_option_inst_add_option(struct team *team,
190 struct team_option *option)
191 {
192 int err;
193
194 if (!option->per_port) {
195 err = __team_option_inst_add(team, option, NULL);
196 if (err)
197 goto inst_del_option;
198 }
199 return 0;
200
201 inst_del_option:
202 __team_option_inst_del_option(team, option);
203 return err;
204 }
205
206 static void __team_option_inst_mark_removed_option(struct team *team,
207 struct team_option *option)
208 {
209 struct team_option_inst *opt_inst;
210
211 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
212 if (opt_inst->option == option) {
213 opt_inst->changed = true;
214 opt_inst->removed = true;
215 }
216 }
217 }
218
219 static void __team_option_inst_del_port(struct team *team,
220 struct team_port *port)
221 {
222 struct team_option_inst *opt_inst, *tmp;
223
224 list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
225 if (opt_inst->option->per_port &&
226 opt_inst->info.port == port)
227 __team_option_inst_del(opt_inst);
228 }
229 }
230
231 static int __team_option_inst_add_port(struct team *team,
232 struct team_port *port)
233 {
234 struct team_option *option;
235 int err;
236
237 list_for_each_entry(option, &team->option_list, list) {
238 if (!option->per_port)
239 continue;
240 err = __team_option_inst_add(team, option, port);
241 if (err)
242 goto inst_del_port;
243 }
244 return 0;
245
246 inst_del_port:
247 __team_option_inst_del_port(team, port);
248 return err;
249 }
250
251 static void __team_option_inst_mark_removed_port(struct team *team,
252 struct team_port *port)
253 {
254 struct team_option_inst *opt_inst;
255
256 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
257 if (opt_inst->info.port == port) {
258 opt_inst->changed = true;
259 opt_inst->removed = true;
260 }
261 }
262 }
263
264 static int __team_options_register(struct team *team,
265 const struct team_option *option,
266 size_t option_count)
267 {
268 int i;
269 struct team_option **dst_opts;
270 int err;
271
272 dst_opts = kzalloc(sizeof(struct team_option *) * option_count,
273 GFP_KERNEL);
274 if (!dst_opts)
275 return -ENOMEM;
276 for (i = 0; i < option_count; i++, option++) {
277 if (__team_find_option(team, option->name)) {
278 err = -EEXIST;
279 goto alloc_rollback;
280 }
281 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
282 if (!dst_opts[i]) {
283 err = -ENOMEM;
284 goto alloc_rollback;
285 }
286 }
287
288 for (i = 0; i < option_count; i++) {
289 err = __team_option_inst_add_option(team, dst_opts[i]);
290 if (err)
291 goto inst_rollback;
292 list_add_tail(&dst_opts[i]->list, &team->option_list);
293 }
294
295 kfree(dst_opts);
296 return 0;
297
298 inst_rollback:
299 for (i--; i >= 0; i--)
300 __team_option_inst_del_option(team, dst_opts[i]);
301
302 i = option_count - 1;
303 alloc_rollback:
304 for (i--; i >= 0; i--)
305 kfree(dst_opts[i]);
306
307 kfree(dst_opts);
308 return err;
309 }
310
311 static void __team_options_mark_removed(struct team *team,
312 const struct team_option *option,
313 size_t option_count)
314 {
315 int i;
316
317 for (i = 0; i < option_count; i++, option++) {
318 struct team_option *del_opt;
319
320 del_opt = __team_find_option(team, option->name);
321 if (del_opt)
322 __team_option_inst_mark_removed_option(team, del_opt);
323 }
324 }
325
326 static void __team_options_unregister(struct team *team,
327 const struct team_option *option,
328 size_t option_count)
329 {
330 int i;
331
332 for (i = 0; i < option_count; i++, option++) {
333 struct team_option *del_opt;
334
335 del_opt = __team_find_option(team, option->name);
336 if (del_opt) {
337 __team_option_inst_del_option(team, del_opt);
338 list_del(&del_opt->list);
339 kfree(del_opt);
340 }
341 }
342 }
343
344 static void __team_options_change_check(struct team *team);
345
346 int team_options_register(struct team *team,
347 const struct team_option *option,
348 size_t option_count)
349 {
350 int err;
351
352 err = __team_options_register(team, option, option_count);
353 if (err)
354 return err;
355 __team_options_change_check(team);
356 return 0;
357 }
358 EXPORT_SYMBOL(team_options_register);
359
360 void team_options_unregister(struct team *team,
361 const struct team_option *option,
362 size_t option_count)
363 {
364 __team_options_mark_removed(team, option, option_count);
365 __team_options_change_check(team);
366 __team_options_unregister(team, option, option_count);
367 }
368 EXPORT_SYMBOL(team_options_unregister);
369
370 static int team_option_get(struct team *team,
371 struct team_option_inst *opt_inst,
372 struct team_gsetter_ctx *ctx)
373 {
374 if (!opt_inst->option->getter)
375 return -EOPNOTSUPP;
376 return opt_inst->option->getter(team, ctx);
377 }
378
379 static int team_option_set(struct team *team,
380 struct team_option_inst *opt_inst,
381 struct team_gsetter_ctx *ctx)
382 {
383 if (!opt_inst->option->setter)
384 return -EOPNOTSUPP;
385 return opt_inst->option->setter(team, ctx);
386 }
387
388 void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info)
389 {
390 struct team_option_inst *opt_inst;
391
392 opt_inst = container_of(opt_inst_info, struct team_option_inst, info);
393 opt_inst->changed = true;
394 }
395 EXPORT_SYMBOL(team_option_inst_set_change);
396
397 void team_options_change_check(struct team *team)
398 {
399 __team_options_change_check(team);
400 }
401 EXPORT_SYMBOL(team_options_change_check);
402
403
404 /****************
405 * Mode handling
406 ****************/
407
408 static LIST_HEAD(mode_list);
409 static DEFINE_SPINLOCK(mode_list_lock);
410
411 struct team_mode_item {
412 struct list_head list;
413 const struct team_mode *mode;
414 };
415
416 static struct team_mode_item *__find_mode(const char *kind)
417 {
418 struct team_mode_item *mitem;
419
420 list_for_each_entry(mitem, &mode_list, list) {
421 if (strcmp(mitem->mode->kind, kind) == 0)
422 return mitem;
423 }
424 return NULL;
425 }
426
427 static bool is_good_mode_name(const char *name)
428 {
429 while (*name != '\0') {
430 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
431 return false;
432 name++;
433 }
434 return true;
435 }
436
437 int team_mode_register(const struct team_mode *mode)
438 {
439 int err = 0;
440 struct team_mode_item *mitem;
441
442 if (!is_good_mode_name(mode->kind) ||
443 mode->priv_size > TEAM_MODE_PRIV_SIZE)
444 return -EINVAL;
445
446 mitem = kmalloc(sizeof(*mitem), GFP_KERNEL);
447 if (!mitem)
448 return -ENOMEM;
449
450 spin_lock(&mode_list_lock);
451 if (__find_mode(mode->kind)) {
452 err = -EEXIST;
453 kfree(mitem);
454 goto unlock;
455 }
456 mitem->mode = mode;
457 list_add_tail(&mitem->list, &mode_list);
458 unlock:
459 spin_unlock(&mode_list_lock);
460 return err;
461 }
462 EXPORT_SYMBOL(team_mode_register);
463
464 void team_mode_unregister(const struct team_mode *mode)
465 {
466 struct team_mode_item *mitem;
467
468 spin_lock(&mode_list_lock);
469 mitem = __find_mode(mode->kind);
470 if (mitem) {
471 list_del_init(&mitem->list);
472 kfree(mitem);
473 }
474 spin_unlock(&mode_list_lock);
475 }
476 EXPORT_SYMBOL(team_mode_unregister);
477
478 static const struct team_mode *team_mode_get(const char *kind)
479 {
480 struct team_mode_item *mitem;
481 const struct team_mode *mode = NULL;
482
483 spin_lock(&mode_list_lock);
484 mitem = __find_mode(kind);
485 if (!mitem) {
486 spin_unlock(&mode_list_lock);
487 request_module("team-mode-%s", kind);
488 spin_lock(&mode_list_lock);
489 mitem = __find_mode(kind);
490 }
491 if (mitem) {
492 mode = mitem->mode;
493 if (!try_module_get(mode->owner))
494 mode = NULL;
495 }
496
497 spin_unlock(&mode_list_lock);
498 return mode;
499 }
500
501 static void team_mode_put(const struct team_mode *mode)
502 {
503 module_put(mode->owner);
504 }
505
506 static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
507 {
508 dev_kfree_skb_any(skb);
509 return false;
510 }
511
512 static rx_handler_result_t team_dummy_receive(struct team *team,
513 struct team_port *port,
514 struct sk_buff *skb)
515 {
516 return RX_HANDLER_ANOTHER;
517 }
518
519 static const struct team_mode __team_no_mode = {
520 .kind = "*NOMODE*",
521 };
522
523 static bool team_is_mode_set(struct team *team)
524 {
525 return team->mode != &__team_no_mode;
526 }
527
528 static void team_set_no_mode(struct team *team)
529 {
530 team->user_carrier_enabled = false;
531 team->mode = &__team_no_mode;
532 }
533
534 static void team_adjust_ops(struct team *team)
535 {
536 /*
537 * To avoid checks in rx/tx skb paths, ensure here that non-null and
538 * correct ops are always set.
539 */
540
541 if (!team->en_port_count || !team_is_mode_set(team) ||
542 !team->mode->ops->transmit)
543 team->ops.transmit = team_dummy_transmit;
544 else
545 team->ops.transmit = team->mode->ops->transmit;
546
547 if (!team->en_port_count || !team_is_mode_set(team) ||
548 !team->mode->ops->receive)
549 team->ops.receive = team_dummy_receive;
550 else
551 team->ops.receive = team->mode->ops->receive;
552 }
553
554 /*
555 * We can benefit from the fact that it's ensured no port is present
556 * at the time of mode change. Therefore no packets are in fly so there's no
557 * need to set mode operations in any special way.
558 */
559 static int __team_change_mode(struct team *team,
560 const struct team_mode *new_mode)
561 {
562 /* Check if mode was previously set and do cleanup if so */
563 if (team_is_mode_set(team)) {
564 void (*exit_op)(struct team *team) = team->ops.exit;
565
566 /* Clear ops area so no callback is called any longer */
567 memset(&team->ops, 0, sizeof(struct team_mode_ops));
568 team_adjust_ops(team);
569
570 if (exit_op)
571 exit_op(team);
572 team_mode_put(team->mode);
573 team_set_no_mode(team);
574 /* zero private data area */
575 memset(&team->mode_priv, 0,
576 sizeof(struct team) - offsetof(struct team, mode_priv));
577 }
578
579 if (!new_mode)
580 return 0;
581
582 if (new_mode->ops->init) {
583 int err;
584
585 err = new_mode->ops->init(team);
586 if (err)
587 return err;
588 }
589
590 team->mode = new_mode;
591 memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
592 team_adjust_ops(team);
593
594 return 0;
595 }
596
597 static int team_change_mode(struct team *team, const char *kind)
598 {
599 const struct team_mode *new_mode;
600 struct net_device *dev = team->dev;
601 int err;
602
603 if (!list_empty(&team->port_list)) {
604 netdev_err(dev, "No ports can be present during mode change\n");
605 return -EBUSY;
606 }
607
608 if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) {
609 netdev_err(dev, "Unable to change to the same mode the team is in\n");
610 return -EINVAL;
611 }
612
613 new_mode = team_mode_get(kind);
614 if (!new_mode) {
615 netdev_err(dev, "Mode \"%s\" not found\n", kind);
616 return -EINVAL;
617 }
618
619 err = __team_change_mode(team, new_mode);
620 if (err) {
621 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
622 team_mode_put(new_mode);
623 return err;
624 }
625
626 netdev_info(dev, "Mode changed to \"%s\"\n", kind);
627 return 0;
628 }
629
630
631 /*********************
632 * Peers notification
633 *********************/
634
635 static void team_notify_peers_work(struct work_struct *work)
636 {
637 struct team *team;
638 int val;
639
640 team = container_of(work, struct team, notify_peers.dw.work);
641
642 if (!rtnl_trylock()) {
643 schedule_delayed_work(&team->notify_peers.dw, 0);
644 return;
645 }
646 val = atomic_dec_if_positive(&team->notify_peers.count_pending);
647 if (val < 0) {
648 rtnl_unlock();
649 return;
650 }
651 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, team->dev);
652 rtnl_unlock();
653 if (val)
654 schedule_delayed_work(&team->notify_peers.dw,
655 msecs_to_jiffies(team->notify_peers.interval));
656 }
657
658 static void team_notify_peers(struct team *team)
659 {
660 if (!team->notify_peers.count || !netif_running(team->dev))
661 return;
662 atomic_add(team->notify_peers.count, &team->notify_peers.count_pending);
663 schedule_delayed_work(&team->notify_peers.dw, 0);
664 }
665
666 static void team_notify_peers_init(struct team *team)
667 {
668 INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work);
669 }
670
671 static void team_notify_peers_fini(struct team *team)
672 {
673 cancel_delayed_work_sync(&team->notify_peers.dw);
674 }
675
676
677 /*******************************
678 * Send multicast group rejoins
679 *******************************/
680
681 static void team_mcast_rejoin_work(struct work_struct *work)
682 {
683 struct team *team;
684 int val;
685
686 team = container_of(work, struct team, mcast_rejoin.dw.work);
687
688 if (!rtnl_trylock()) {
689 schedule_delayed_work(&team->mcast_rejoin.dw, 0);
690 return;
691 }
692 val = atomic_dec_if_positive(&team->mcast_rejoin.count_pending);
693 if (val < 0) {
694 rtnl_unlock();
695 return;
696 }
697 call_netdevice_notifiers(NETDEV_RESEND_IGMP, team->dev);
698 rtnl_unlock();
699 if (val)
700 schedule_delayed_work(&team->mcast_rejoin.dw,
701 msecs_to_jiffies(team->mcast_rejoin.interval));
702 }
703
704 static void team_mcast_rejoin(struct team *team)
705 {
706 if (!team->mcast_rejoin.count || !netif_running(team->dev))
707 return;
708 atomic_add(team->mcast_rejoin.count, &team->mcast_rejoin.count_pending);
709 schedule_delayed_work(&team->mcast_rejoin.dw, 0);
710 }
711
712 static void team_mcast_rejoin_init(struct team *team)
713 {
714 INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work);
715 }
716
717 static void team_mcast_rejoin_fini(struct team *team)
718 {
719 cancel_delayed_work_sync(&team->mcast_rejoin.dw);
720 }
721
722
723 /************************
724 * Rx path frame handler
725 ************************/
726
727 /* note: already called with rcu_read_lock */
728 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
729 {
730 struct sk_buff *skb = *pskb;
731 struct team_port *port;
732 struct team *team;
733 rx_handler_result_t res;
734
735 skb = skb_share_check(skb, GFP_ATOMIC);
736 if (!skb)
737 return RX_HANDLER_CONSUMED;
738
739 *pskb = skb;
740
741 port = team_port_get_rcu(skb->dev);
742 team = port->team;
743 if (!team_port_enabled(port)) {
744 /* allow exact match delivery for disabled ports */
745 res = RX_HANDLER_EXACT;
746 } else {
747 res = team->ops.receive(team, port, skb);
748 }
749 if (res == RX_HANDLER_ANOTHER) {
750 struct team_pcpu_stats *pcpu_stats;
751
752 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
753 u64_stats_update_begin(&pcpu_stats->syncp);
754 pcpu_stats->rx_packets++;
755 pcpu_stats->rx_bytes += skb->len;
756 if (skb->pkt_type == PACKET_MULTICAST)
757 pcpu_stats->rx_multicast++;
758 u64_stats_update_end(&pcpu_stats->syncp);
759
760 skb->dev = team->dev;
761 } else if (res == RX_HANDLER_EXACT) {
762 this_cpu_inc(team->pcpu_stats->rx_nohandler);
763 } else {
764 this_cpu_inc(team->pcpu_stats->rx_dropped);
765 }
766
767 return res;
768 }
769
770
771 /*************************************
772 * Multiqueue Tx port select override
773 *************************************/
774
775 static int team_queue_override_init(struct team *team)
776 {
777 struct list_head *listarr;
778 unsigned int queue_cnt = team->dev->num_tx_queues - 1;
779 unsigned int i;
780
781 if (!queue_cnt)
782 return 0;
783 listarr = kmalloc(sizeof(struct list_head) * queue_cnt, GFP_KERNEL);
784 if (!listarr)
785 return -ENOMEM;
786 team->qom_lists = listarr;
787 for (i = 0; i < queue_cnt; i++)
788 INIT_LIST_HEAD(listarr++);
789 return 0;
790 }
791
792 static void team_queue_override_fini(struct team *team)
793 {
794 kfree(team->qom_lists);
795 }
796
797 static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
798 {
799 return &team->qom_lists[queue_id - 1];
800 }
801
802 /*
803 * note: already called with rcu_read_lock
804 */
805 static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
806 {
807 struct list_head *qom_list;
808 struct team_port *port;
809
810 if (!team->queue_override_enabled || !skb->queue_mapping)
811 return false;
812 qom_list = __team_get_qom_list(team, skb->queue_mapping);
813 list_for_each_entry_rcu(port, qom_list, qom_list) {
814 if (!team_dev_queue_xmit(team, port, skb))
815 return true;
816 }
817 return false;
818 }
819
820 static void __team_queue_override_port_del(struct team *team,
821 struct team_port *port)
822 {
823 if (!port->queue_id)
824 return;
825 list_del_rcu(&port->qom_list);
826 }
827
828 static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
829 struct team_port *cur)
830 {
831 if (port->priority < cur->priority)
832 return true;
833 if (port->priority > cur->priority)
834 return false;
835 if (port->index < cur->index)
836 return true;
837 return false;
838 }
839
840 static void __team_queue_override_port_add(struct team *team,
841 struct team_port *port)
842 {
843 struct team_port *cur;
844 struct list_head *qom_list;
845 struct list_head *node;
846
847 if (!port->queue_id)
848 return;
849 qom_list = __team_get_qom_list(team, port->queue_id);
850 node = qom_list;
851 list_for_each_entry(cur, qom_list, qom_list) {
852 if (team_queue_override_port_has_gt_prio_than(port, cur))
853 break;
854 node = &cur->qom_list;
855 }
856 list_add_tail_rcu(&port->qom_list, node);
857 }
858
859 static void __team_queue_override_enabled_check(struct team *team)
860 {
861 struct team_port *port;
862 bool enabled = false;
863
864 list_for_each_entry(port, &team->port_list, list) {
865 if (port->queue_id) {
866 enabled = true;
867 break;
868 }
869 }
870 if (enabled == team->queue_override_enabled)
871 return;
872 netdev_dbg(team->dev, "%s queue override\n",
873 enabled ? "Enabling" : "Disabling");
874 team->queue_override_enabled = enabled;
875 }
876
877 static void team_queue_override_port_prio_changed(struct team *team,
878 struct team_port *port)
879 {
880 if (!port->queue_id || team_port_enabled(port))
881 return;
882 __team_queue_override_port_del(team, port);
883 __team_queue_override_port_add(team, port);
884 __team_queue_override_enabled_check(team);
885 }
886
887 static void team_queue_override_port_change_queue_id(struct team *team,
888 struct team_port *port,
889 u16 new_queue_id)
890 {
891 if (team_port_enabled(port)) {
892 __team_queue_override_port_del(team, port);
893 port->queue_id = new_queue_id;
894 __team_queue_override_port_add(team, port);
895 __team_queue_override_enabled_check(team);
896 } else {
897 port->queue_id = new_queue_id;
898 }
899 }
900
901 static void team_queue_override_port_add(struct team *team,
902 struct team_port *port)
903 {
904 __team_queue_override_port_add(team, port);
905 __team_queue_override_enabled_check(team);
906 }
907
908 static void team_queue_override_port_del(struct team *team,
909 struct team_port *port)
910 {
911 __team_queue_override_port_del(team, port);
912 __team_queue_override_enabled_check(team);
913 }
914
915
916 /****************
917 * Port handling
918 ****************/
919
920 static bool team_port_find(const struct team *team,
921 const struct team_port *port)
922 {
923 struct team_port *cur;
924
925 list_for_each_entry(cur, &team->port_list, list)
926 if (cur == port)
927 return true;
928 return false;
929 }
930
931 /*
932 * Enable/disable port by adding to enabled port hashlist and setting
933 * port->index (Might be racy so reader could see incorrect ifindex when
934 * processing a flying packet, but that is not a problem). Write guarded
935 * by team->lock.
936 */
937 static void team_port_enable(struct team *team,
938 struct team_port *port)
939 {
940 if (team_port_enabled(port))
941 return;
942 port->index = team->en_port_count++;
943 hlist_add_head_rcu(&port->hlist,
944 team_port_index_hash(team, port->index));
945 team_adjust_ops(team);
946 team_queue_override_port_add(team, port);
947 if (team->ops.port_enabled)
948 team->ops.port_enabled(team, port);
949 team_notify_peers(team);
950 team_mcast_rejoin(team);
951 team_lower_state_changed(port);
952 }
953
954 static void __reconstruct_port_hlist(struct team *team, int rm_index)
955 {
956 int i;
957 struct team_port *port;
958
959 for (i = rm_index + 1; i < team->en_port_count; i++) {
960 port = team_get_port_by_index(team, i);
961 hlist_del_rcu(&port->hlist);
962 port->index--;
963 hlist_add_head_rcu(&port->hlist,
964 team_port_index_hash(team, port->index));
965 }
966 }
967
968 static void team_port_disable(struct team *team,
969 struct team_port *port)
970 {
971 if (!team_port_enabled(port))
972 return;
973 if (team->ops.port_disabled)
974 team->ops.port_disabled(team, port);
975 hlist_del_rcu(&port->hlist);
976 __reconstruct_port_hlist(team, port->index);
977 port->index = -1;
978 team->en_port_count--;
979 team_queue_override_port_del(team, port);
980 team_adjust_ops(team);
981 team_notify_peers(team);
982 team_mcast_rejoin(team);
983 team_lower_state_changed(port);
984 }
985
986 #define TEAM_VLAN_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
987 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
988 NETIF_F_HIGHDMA | NETIF_F_LRO)
989
990 #define TEAM_ENC_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
991 NETIF_F_RXCSUM | NETIF_F_ALL_TSO)
992
993 static void ___team_compute_features(struct team *team)
994 {
995 struct team_port *port;
996 u32 vlan_features = TEAM_VLAN_FEATURES & NETIF_F_ALL_FOR_ALL;
997 netdev_features_t enc_features = TEAM_ENC_FEATURES;
998 unsigned short max_hard_header_len = ETH_HLEN;
999 unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE |
1000 IFF_XMIT_DST_RELEASE_PERM;
1001
1002 list_for_each_entry(port, &team->port_list, list) {
1003 vlan_features = netdev_increment_features(vlan_features,
1004 port->dev->vlan_features,
1005 TEAM_VLAN_FEATURES);
1006 enc_features =
1007 netdev_increment_features(enc_features,
1008 port->dev->hw_enc_features,
1009 TEAM_ENC_FEATURES);
1010
1011
1012 dst_release_flag &= port->dev->priv_flags;
1013 if (port->dev->hard_header_len > max_hard_header_len)
1014 max_hard_header_len = port->dev->hard_header_len;
1015 }
1016
1017 team->dev->vlan_features = vlan_features;
1018 team->dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL;
1019 team->dev->hard_header_len = max_hard_header_len;
1020
1021 team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
1022 if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
1023 team->dev->priv_flags |= IFF_XMIT_DST_RELEASE;
1024 }
1025
1026 static void __team_compute_features(struct team *team)
1027 {
1028 ___team_compute_features(team);
1029 netdev_change_features(team->dev);
1030 }
1031
1032 static void team_compute_features(struct team *team)
1033 {
1034 mutex_lock(&team->lock);
1035 ___team_compute_features(team);
1036 mutex_unlock(&team->lock);
1037 netdev_change_features(team->dev);
1038 }
1039
1040 static int team_port_enter(struct team *team, struct team_port *port)
1041 {
1042 int err = 0;
1043
1044 dev_hold(team->dev);
1045 if (team->ops.port_enter) {
1046 err = team->ops.port_enter(team, port);
1047 if (err) {
1048 netdev_err(team->dev, "Device %s failed to enter team mode\n",
1049 port->dev->name);
1050 goto err_port_enter;
1051 }
1052 }
1053
1054 return 0;
1055
1056 err_port_enter:
1057 dev_put(team->dev);
1058
1059 return err;
1060 }
1061
1062 static void team_port_leave(struct team *team, struct team_port *port)
1063 {
1064 if (team->ops.port_leave)
1065 team->ops.port_leave(team, port);
1066 dev_put(team->dev);
1067 }
1068
1069 #ifdef CONFIG_NET_POLL_CONTROLLER
1070 static int team_port_enable_netpoll(struct team *team, struct team_port *port)
1071 {
1072 struct netpoll *np;
1073 int err;
1074
1075 if (!team->dev->npinfo)
1076 return 0;
1077
1078 np = kzalloc(sizeof(*np), GFP_KERNEL);
1079 if (!np)
1080 return -ENOMEM;
1081
1082 err = __netpoll_setup(np, port->dev);
1083 if (err) {
1084 kfree(np);
1085 return err;
1086 }
1087 port->np = np;
1088 return err;
1089 }
1090
1091 static void team_port_disable_netpoll(struct team_port *port)
1092 {
1093 struct netpoll *np = port->np;
1094
1095 if (!np)
1096 return;
1097 port->np = NULL;
1098
1099 /* Wait for transmitting packets to finish before freeing. */
1100 synchronize_rcu_bh();
1101 __netpoll_cleanup(np);
1102 kfree(np);
1103 }
1104 #else
1105 static int team_port_enable_netpoll(struct team *team, struct team_port *port)
1106 {
1107 return 0;
1108 }
1109 static void team_port_disable_netpoll(struct team_port *port)
1110 {
1111 }
1112 #endif
1113
1114 static int team_upper_dev_link(struct team *team, struct team_port *port)
1115 {
1116 struct netdev_lag_upper_info lag_upper_info;
1117 int err;
1118
1119 lag_upper_info.tx_type = team->mode->lag_tx_type;
1120 err = netdev_master_upper_dev_link(port->dev, team->dev, NULL,
1121 &lag_upper_info);
1122 if (err)
1123 return err;
1124 port->dev->priv_flags |= IFF_TEAM_PORT;
1125 return 0;
1126 }
1127
1128 static void team_upper_dev_unlink(struct team *team, struct team_port *port)
1129 {
1130 netdev_upper_dev_unlink(port->dev, team->dev);
1131 port->dev->priv_flags &= ~IFF_TEAM_PORT;
1132 }
1133
1134 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1135 static int team_dev_type_check_change(struct net_device *dev,
1136 struct net_device *port_dev);
1137
1138 static int team_port_add(struct team *team, struct net_device *port_dev)
1139 {
1140 struct net_device *dev = team->dev;
1141 struct team_port *port;
1142 char *portname = port_dev->name;
1143 int err;
1144
1145 if (port_dev->flags & IFF_LOOPBACK) {
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 (team_port_exists(port_dev)) {
1152 netdev_err(dev, "Device %s is already a port "
1153 "of a team device\n", portname);
1154 return -EBUSY;
1155 }
1156
1157 if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1158 vlan_uses_dev(dev)) {
1159 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1160 portname);
1161 return -EPERM;
1162 }
1163
1164 err = team_dev_type_check_change(dev, port_dev);
1165 if (err)
1166 return err;
1167
1168 if (port_dev->flags & IFF_UP) {
1169 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1170 portname);
1171 return -EBUSY;
1172 }
1173
1174 port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1175 GFP_KERNEL);
1176 if (!port)
1177 return -ENOMEM;
1178
1179 port->dev = port_dev;
1180 port->team = team;
1181 INIT_LIST_HEAD(&port->qom_list);
1182
1183 port->orig.mtu = port_dev->mtu;
1184 err = dev_set_mtu(port_dev, dev->mtu);
1185 if (err) {
1186 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1187 goto err_set_mtu;
1188 }
1189
1190 memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1191
1192 err = team_port_enter(team, port);
1193 if (err) {
1194 netdev_err(dev, "Device %s failed to enter team mode\n",
1195 portname);
1196 goto err_port_enter;
1197 }
1198
1199 err = dev_open(port_dev);
1200 if (err) {
1201 netdev_dbg(dev, "Device %s opening failed\n",
1202 portname);
1203 goto err_dev_open;
1204 }
1205
1206 netif_addr_lock_bh(dev);
1207 dev_uc_sync_multiple(port_dev, dev);
1208 dev_mc_sync_multiple(port_dev, dev);
1209 netif_addr_unlock_bh(dev);
1210
1211 err = vlan_vids_add_by_dev(port_dev, dev);
1212 if (err) {
1213 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1214 portname);
1215 goto err_vids_add;
1216 }
1217
1218 err = team_port_enable_netpoll(team, port);
1219 if (err) {
1220 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1221 portname);
1222 goto err_enable_netpoll;
1223 }
1224
1225 if (!(dev->features & NETIF_F_LRO))
1226 dev_disable_lro(port_dev);
1227
1228 err = netdev_rx_handler_register(port_dev, team_handle_frame,
1229 port);
1230 if (err) {
1231 netdev_err(dev, "Device %s failed to register rx_handler\n",
1232 portname);
1233 goto err_handler_register;
1234 }
1235
1236 err = team_upper_dev_link(team, port);
1237 if (err) {
1238 netdev_err(dev, "Device %s failed to set upper link\n",
1239 portname);
1240 goto err_set_upper_link;
1241 }
1242
1243 err = __team_option_inst_add_port(team, port);
1244 if (err) {
1245 netdev_err(dev, "Device %s failed to add per-port options\n",
1246 portname);
1247 goto err_option_port_add;
1248 }
1249
1250 port->index = -1;
1251 list_add_tail_rcu(&port->list, &team->port_list);
1252 team_port_enable(team, port);
1253 __team_compute_features(team);
1254 __team_port_change_port_added(port, !!netif_carrier_ok(port_dev));
1255 __team_options_change_check(team);
1256
1257 netdev_info(dev, "Port device %s added\n", portname);
1258
1259 return 0;
1260
1261 err_option_port_add:
1262 team_upper_dev_unlink(team, port);
1263
1264 err_set_upper_link:
1265 netdev_rx_handler_unregister(port_dev);
1266
1267 err_handler_register:
1268 team_port_disable_netpoll(port);
1269
1270 err_enable_netpoll:
1271 vlan_vids_del_by_dev(port_dev, dev);
1272
1273 err_vids_add:
1274 dev_uc_unsync(port_dev, dev);
1275 dev_mc_unsync(port_dev, dev);
1276 dev_close(port_dev);
1277
1278 err_dev_open:
1279 team_port_leave(team, port);
1280 team_port_set_orig_dev_addr(port);
1281
1282 err_port_enter:
1283 dev_set_mtu(port_dev, port->orig.mtu);
1284
1285 err_set_mtu:
1286 kfree(port);
1287
1288 return err;
1289 }
1290
1291 static void __team_port_change_port_removed(struct team_port *port);
1292
1293 static int team_port_del(struct team *team, struct net_device *port_dev)
1294 {
1295 struct net_device *dev = team->dev;
1296 struct team_port *port;
1297 char *portname = port_dev->name;
1298
1299 port = team_port_get_rtnl(port_dev);
1300 if (!port || !team_port_find(team, port)) {
1301 netdev_err(dev, "Device %s does not act as a port of this team\n",
1302 portname);
1303 return -ENOENT;
1304 }
1305
1306 team_port_disable(team, port);
1307 list_del_rcu(&port->list);
1308 team_upper_dev_unlink(team, port);
1309 netdev_rx_handler_unregister(port_dev);
1310 team_port_disable_netpoll(port);
1311 vlan_vids_del_by_dev(port_dev, dev);
1312 dev_uc_unsync(port_dev, dev);
1313 dev_mc_unsync(port_dev, dev);
1314 dev_close(port_dev);
1315 team_port_leave(team, port);
1316
1317 __team_option_inst_mark_removed_port(team, port);
1318 __team_options_change_check(team);
1319 __team_option_inst_del_port(team, port);
1320 __team_port_change_port_removed(port);
1321
1322 team_port_set_orig_dev_addr(port);
1323 dev_set_mtu(port_dev, port->orig.mtu);
1324 kfree_rcu(port, rcu);
1325 netdev_info(dev, "Port device %s removed\n", portname);
1326 __team_compute_features(team);
1327
1328 return 0;
1329 }
1330
1331
1332 /*****************
1333 * Net device ops
1334 *****************/
1335
1336 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1337 {
1338 ctx->data.str_val = team->mode->kind;
1339 return 0;
1340 }
1341
1342 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1343 {
1344 return team_change_mode(team, ctx->data.str_val);
1345 }
1346
1347 static int team_notify_peers_count_get(struct team *team,
1348 struct team_gsetter_ctx *ctx)
1349 {
1350 ctx->data.u32_val = team->notify_peers.count;
1351 return 0;
1352 }
1353
1354 static int team_notify_peers_count_set(struct team *team,
1355 struct team_gsetter_ctx *ctx)
1356 {
1357 team->notify_peers.count = ctx->data.u32_val;
1358 return 0;
1359 }
1360
1361 static int team_notify_peers_interval_get(struct team *team,
1362 struct team_gsetter_ctx *ctx)
1363 {
1364 ctx->data.u32_val = team->notify_peers.interval;
1365 return 0;
1366 }
1367
1368 static int team_notify_peers_interval_set(struct team *team,
1369 struct team_gsetter_ctx *ctx)
1370 {
1371 team->notify_peers.interval = ctx->data.u32_val;
1372 return 0;
1373 }
1374
1375 static int team_mcast_rejoin_count_get(struct team *team,
1376 struct team_gsetter_ctx *ctx)
1377 {
1378 ctx->data.u32_val = team->mcast_rejoin.count;
1379 return 0;
1380 }
1381
1382 static int team_mcast_rejoin_count_set(struct team *team,
1383 struct team_gsetter_ctx *ctx)
1384 {
1385 team->mcast_rejoin.count = ctx->data.u32_val;
1386 return 0;
1387 }
1388
1389 static int team_mcast_rejoin_interval_get(struct team *team,
1390 struct team_gsetter_ctx *ctx)
1391 {
1392 ctx->data.u32_val = team->mcast_rejoin.interval;
1393 return 0;
1394 }
1395
1396 static int team_mcast_rejoin_interval_set(struct team *team,
1397 struct team_gsetter_ctx *ctx)
1398 {
1399 team->mcast_rejoin.interval = ctx->data.u32_val;
1400 return 0;
1401 }
1402
1403 static int team_port_en_option_get(struct team *team,
1404 struct team_gsetter_ctx *ctx)
1405 {
1406 struct team_port *port = ctx->info->port;
1407
1408 ctx->data.bool_val = team_port_enabled(port);
1409 return 0;
1410 }
1411
1412 static int team_port_en_option_set(struct team *team,
1413 struct team_gsetter_ctx *ctx)
1414 {
1415 struct team_port *port = ctx->info->port;
1416
1417 if (ctx->data.bool_val)
1418 team_port_enable(team, port);
1419 else
1420 team_port_disable(team, port);
1421 return 0;
1422 }
1423
1424 static int team_user_linkup_option_get(struct team *team,
1425 struct team_gsetter_ctx *ctx)
1426 {
1427 struct team_port *port = ctx->info->port;
1428
1429 ctx->data.bool_val = port->user.linkup;
1430 return 0;
1431 }
1432
1433 static void __team_carrier_check(struct team *team);
1434
1435 static int team_user_linkup_option_set(struct team *team,
1436 struct team_gsetter_ctx *ctx)
1437 {
1438 struct team_port *port = ctx->info->port;
1439
1440 port->user.linkup = ctx->data.bool_val;
1441 team_refresh_port_linkup(port);
1442 __team_carrier_check(port->team);
1443 return 0;
1444 }
1445
1446 static int team_user_linkup_en_option_get(struct team *team,
1447 struct team_gsetter_ctx *ctx)
1448 {
1449 struct team_port *port = ctx->info->port;
1450
1451 ctx->data.bool_val = port->user.linkup_enabled;
1452 return 0;
1453 }
1454
1455 static int team_user_linkup_en_option_set(struct team *team,
1456 struct team_gsetter_ctx *ctx)
1457 {
1458 struct team_port *port = ctx->info->port;
1459
1460 port->user.linkup_enabled = ctx->data.bool_val;
1461 team_refresh_port_linkup(port);
1462 __team_carrier_check(port->team);
1463 return 0;
1464 }
1465
1466 static int team_priority_option_get(struct team *team,
1467 struct team_gsetter_ctx *ctx)
1468 {
1469 struct team_port *port = ctx->info->port;
1470
1471 ctx->data.s32_val = port->priority;
1472 return 0;
1473 }
1474
1475 static int team_priority_option_set(struct team *team,
1476 struct team_gsetter_ctx *ctx)
1477 {
1478 struct team_port *port = ctx->info->port;
1479 s32 priority = ctx->data.s32_val;
1480
1481 if (port->priority == priority)
1482 return 0;
1483 port->priority = priority;
1484 team_queue_override_port_prio_changed(team, port);
1485 return 0;
1486 }
1487
1488 static int team_queue_id_option_get(struct team *team,
1489 struct team_gsetter_ctx *ctx)
1490 {
1491 struct team_port *port = ctx->info->port;
1492
1493 ctx->data.u32_val = port->queue_id;
1494 return 0;
1495 }
1496
1497 static int team_queue_id_option_set(struct team *team,
1498 struct team_gsetter_ctx *ctx)
1499 {
1500 struct team_port *port = ctx->info->port;
1501 u16 new_queue_id = ctx->data.u32_val;
1502
1503 if (port->queue_id == new_queue_id)
1504 return 0;
1505 if (new_queue_id >= team->dev->real_num_tx_queues)
1506 return -EINVAL;
1507 team_queue_override_port_change_queue_id(team, port, new_queue_id);
1508 return 0;
1509 }
1510
1511 static const struct team_option team_options[] = {
1512 {
1513 .name = "mode",
1514 .type = TEAM_OPTION_TYPE_STRING,
1515 .getter = team_mode_option_get,
1516 .setter = team_mode_option_set,
1517 },
1518 {
1519 .name = "notify_peers_count",
1520 .type = TEAM_OPTION_TYPE_U32,
1521 .getter = team_notify_peers_count_get,
1522 .setter = team_notify_peers_count_set,
1523 },
1524 {
1525 .name = "notify_peers_interval",
1526 .type = TEAM_OPTION_TYPE_U32,
1527 .getter = team_notify_peers_interval_get,
1528 .setter = team_notify_peers_interval_set,
1529 },
1530 {
1531 .name = "mcast_rejoin_count",
1532 .type = TEAM_OPTION_TYPE_U32,
1533 .getter = team_mcast_rejoin_count_get,
1534 .setter = team_mcast_rejoin_count_set,
1535 },
1536 {
1537 .name = "mcast_rejoin_interval",
1538 .type = TEAM_OPTION_TYPE_U32,
1539 .getter = team_mcast_rejoin_interval_get,
1540 .setter = team_mcast_rejoin_interval_set,
1541 },
1542 {
1543 .name = "enabled",
1544 .type = TEAM_OPTION_TYPE_BOOL,
1545 .per_port = true,
1546 .getter = team_port_en_option_get,
1547 .setter = team_port_en_option_set,
1548 },
1549 {
1550 .name = "user_linkup",
1551 .type = TEAM_OPTION_TYPE_BOOL,
1552 .per_port = true,
1553 .getter = team_user_linkup_option_get,
1554 .setter = team_user_linkup_option_set,
1555 },
1556 {
1557 .name = "user_linkup_enabled",
1558 .type = TEAM_OPTION_TYPE_BOOL,
1559 .per_port = true,
1560 .getter = team_user_linkup_en_option_get,
1561 .setter = team_user_linkup_en_option_set,
1562 },
1563 {
1564 .name = "priority",
1565 .type = TEAM_OPTION_TYPE_S32,
1566 .per_port = true,
1567 .getter = team_priority_option_get,
1568 .setter = team_priority_option_set,
1569 },
1570 {
1571 .name = "queue_id",
1572 .type = TEAM_OPTION_TYPE_U32,
1573 .per_port = true,
1574 .getter = team_queue_id_option_get,
1575 .setter = team_queue_id_option_set,
1576 },
1577 };
1578
1579
1580 static int team_init(struct net_device *dev)
1581 {
1582 struct team *team = netdev_priv(dev);
1583 int i;
1584 int err;
1585
1586 team->dev = dev;
1587 mutex_init(&team->lock);
1588 team_set_no_mode(team);
1589
1590 team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1591 if (!team->pcpu_stats)
1592 return -ENOMEM;
1593
1594 for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1595 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1596 INIT_LIST_HEAD(&team->port_list);
1597 err = team_queue_override_init(team);
1598 if (err)
1599 goto err_team_queue_override_init;
1600
1601 team_adjust_ops(team);
1602
1603 INIT_LIST_HEAD(&team->option_list);
1604 INIT_LIST_HEAD(&team->option_inst_list);
1605
1606 team_notify_peers_init(team);
1607 team_mcast_rejoin_init(team);
1608
1609 err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1610 if (err)
1611 goto err_options_register;
1612 netif_carrier_off(dev);
1613
1614 netdev_lockdep_set_classes(dev);
1615
1616 return 0;
1617
1618 err_options_register:
1619 team_mcast_rejoin_fini(team);
1620 team_notify_peers_fini(team);
1621 team_queue_override_fini(team);
1622 err_team_queue_override_init:
1623 free_percpu(team->pcpu_stats);
1624
1625 return err;
1626 }
1627
1628 static void team_uninit(struct net_device *dev)
1629 {
1630 struct team *team = netdev_priv(dev);
1631 struct team_port *port;
1632 struct team_port *tmp;
1633
1634 mutex_lock(&team->lock);
1635 list_for_each_entry_safe(port, tmp, &team->port_list, list)
1636 team_port_del(team, port->dev);
1637
1638 __team_change_mode(team, NULL); /* cleanup */
1639 __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1640 team_mcast_rejoin_fini(team);
1641 team_notify_peers_fini(team);
1642 team_queue_override_fini(team);
1643 mutex_unlock(&team->lock);
1644 }
1645
1646 static void team_destructor(struct net_device *dev)
1647 {
1648 struct team *team = netdev_priv(dev);
1649
1650 free_percpu(team->pcpu_stats);
1651 free_netdev(dev);
1652 }
1653
1654 static int team_open(struct net_device *dev)
1655 {
1656 return 0;
1657 }
1658
1659 static int team_close(struct net_device *dev)
1660 {
1661 return 0;
1662 }
1663
1664 /*
1665 * note: already called with rcu_read_lock
1666 */
1667 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1668 {
1669 struct team *team = netdev_priv(dev);
1670 bool tx_success;
1671 unsigned int len = skb->len;
1672
1673 tx_success = team_queue_override_transmit(team, skb);
1674 if (!tx_success)
1675 tx_success = team->ops.transmit(team, skb);
1676 if (tx_success) {
1677 struct team_pcpu_stats *pcpu_stats;
1678
1679 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1680 u64_stats_update_begin(&pcpu_stats->syncp);
1681 pcpu_stats->tx_packets++;
1682 pcpu_stats->tx_bytes += len;
1683 u64_stats_update_end(&pcpu_stats->syncp);
1684 } else {
1685 this_cpu_inc(team->pcpu_stats->tx_dropped);
1686 }
1687
1688 return NETDEV_TX_OK;
1689 }
1690
1691 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1692 void *accel_priv, select_queue_fallback_t fallback)
1693 {
1694 /*
1695 * This helper function exists to help dev_pick_tx get the correct
1696 * destination queue. Using a helper function skips a call to
1697 * skb_tx_hash and will put the skbs in the queue we expect on their
1698 * way down to the team driver.
1699 */
1700 u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1701
1702 /*
1703 * Save the original txq to restore before passing to the driver
1704 */
1705 qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1706
1707 if (unlikely(txq >= dev->real_num_tx_queues)) {
1708 do {
1709 txq -= dev->real_num_tx_queues;
1710 } while (txq >= dev->real_num_tx_queues);
1711 }
1712 return txq;
1713 }
1714
1715 static void team_change_rx_flags(struct net_device *dev, int change)
1716 {
1717 struct team *team = netdev_priv(dev);
1718 struct team_port *port;
1719 int inc;
1720
1721 rcu_read_lock();
1722 list_for_each_entry_rcu(port, &team->port_list, list) {
1723 if (change & IFF_PROMISC) {
1724 inc = dev->flags & IFF_PROMISC ? 1 : -1;
1725 dev_set_promiscuity(port->dev, inc);
1726 }
1727 if (change & IFF_ALLMULTI) {
1728 inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1729 dev_set_allmulti(port->dev, inc);
1730 }
1731 }
1732 rcu_read_unlock();
1733 }
1734
1735 static void team_set_rx_mode(struct net_device *dev)
1736 {
1737 struct team *team = netdev_priv(dev);
1738 struct team_port *port;
1739
1740 rcu_read_lock();
1741 list_for_each_entry_rcu(port, &team->port_list, list) {
1742 dev_uc_sync_multiple(port->dev, dev);
1743 dev_mc_sync_multiple(port->dev, dev);
1744 }
1745 rcu_read_unlock();
1746 }
1747
1748 static int team_set_mac_address(struct net_device *dev, void *p)
1749 {
1750 struct sockaddr *addr = p;
1751 struct team *team = netdev_priv(dev);
1752 struct team_port *port;
1753
1754 if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1755 return -EADDRNOTAVAIL;
1756 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1757 mutex_lock(&team->lock);
1758 list_for_each_entry(port, &team->port_list, list)
1759 if (team->ops.port_change_dev_addr)
1760 team->ops.port_change_dev_addr(team, port);
1761 mutex_unlock(&team->lock);
1762 return 0;
1763 }
1764
1765 static int team_change_mtu(struct net_device *dev, int new_mtu)
1766 {
1767 struct team *team = netdev_priv(dev);
1768 struct team_port *port;
1769 int err;
1770
1771 /*
1772 * Alhough this is reader, it's guarded by team lock. It's not possible
1773 * to traverse list in reverse under rcu_read_lock
1774 */
1775 mutex_lock(&team->lock);
1776 team->port_mtu_change_allowed = true;
1777 list_for_each_entry(port, &team->port_list, list) {
1778 err = dev_set_mtu(port->dev, new_mtu);
1779 if (err) {
1780 netdev_err(dev, "Device %s failed to change mtu",
1781 port->dev->name);
1782 goto unwind;
1783 }
1784 }
1785 team->port_mtu_change_allowed = false;
1786 mutex_unlock(&team->lock);
1787
1788 dev->mtu = new_mtu;
1789
1790 return 0;
1791
1792 unwind:
1793 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1794 dev_set_mtu(port->dev, dev->mtu);
1795 team->port_mtu_change_allowed = false;
1796 mutex_unlock(&team->lock);
1797
1798 return err;
1799 }
1800
1801 static void
1802 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1803 {
1804 struct team *team = netdev_priv(dev);
1805 struct team_pcpu_stats *p;
1806 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1807 u32 rx_dropped = 0, tx_dropped = 0, rx_nohandler = 0;
1808 unsigned int start;
1809 int i;
1810
1811 for_each_possible_cpu(i) {
1812 p = per_cpu_ptr(team->pcpu_stats, i);
1813 do {
1814 start = u64_stats_fetch_begin_irq(&p->syncp);
1815 rx_packets = p->rx_packets;
1816 rx_bytes = p->rx_bytes;
1817 rx_multicast = p->rx_multicast;
1818 tx_packets = p->tx_packets;
1819 tx_bytes = p->tx_bytes;
1820 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
1821
1822 stats->rx_packets += rx_packets;
1823 stats->rx_bytes += rx_bytes;
1824 stats->multicast += rx_multicast;
1825 stats->tx_packets += tx_packets;
1826 stats->tx_bytes += tx_bytes;
1827 /*
1828 * rx_dropped, tx_dropped & rx_nohandler are u32,
1829 * updated without syncp protection.
1830 */
1831 rx_dropped += p->rx_dropped;
1832 tx_dropped += p->tx_dropped;
1833 rx_nohandler += p->rx_nohandler;
1834 }
1835 stats->rx_dropped = rx_dropped;
1836 stats->tx_dropped = tx_dropped;
1837 stats->rx_nohandler = rx_nohandler;
1838 }
1839
1840 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1841 {
1842 struct team *team = netdev_priv(dev);
1843 struct team_port *port;
1844 int err;
1845
1846 /*
1847 * Alhough this is reader, it's guarded by team lock. It's not possible
1848 * to traverse list in reverse under rcu_read_lock
1849 */
1850 mutex_lock(&team->lock);
1851 list_for_each_entry(port, &team->port_list, list) {
1852 err = vlan_vid_add(port->dev, proto, vid);
1853 if (err)
1854 goto unwind;
1855 }
1856 mutex_unlock(&team->lock);
1857
1858 return 0;
1859
1860 unwind:
1861 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1862 vlan_vid_del(port->dev, proto, vid);
1863 mutex_unlock(&team->lock);
1864
1865 return err;
1866 }
1867
1868 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1869 {
1870 struct team *team = netdev_priv(dev);
1871 struct team_port *port;
1872
1873 mutex_lock(&team->lock);
1874 list_for_each_entry(port, &team->port_list, list)
1875 vlan_vid_del(port->dev, proto, vid);
1876 mutex_unlock(&team->lock);
1877
1878 return 0;
1879 }
1880
1881 #ifdef CONFIG_NET_POLL_CONTROLLER
1882 static void team_poll_controller(struct net_device *dev)
1883 {
1884 }
1885
1886 static void __team_netpoll_cleanup(struct team *team)
1887 {
1888 struct team_port *port;
1889
1890 list_for_each_entry(port, &team->port_list, list)
1891 team_port_disable_netpoll(port);
1892 }
1893
1894 static void team_netpoll_cleanup(struct net_device *dev)
1895 {
1896 struct team *team = netdev_priv(dev);
1897
1898 mutex_lock(&team->lock);
1899 __team_netpoll_cleanup(team);
1900 mutex_unlock(&team->lock);
1901 }
1902
1903 static int team_netpoll_setup(struct net_device *dev,
1904 struct netpoll_info *npifo)
1905 {
1906 struct team *team = netdev_priv(dev);
1907 struct team_port *port;
1908 int err = 0;
1909
1910 mutex_lock(&team->lock);
1911 list_for_each_entry(port, &team->port_list, list) {
1912 err = team_port_enable_netpoll(team, port);
1913 if (err) {
1914 __team_netpoll_cleanup(team);
1915 break;
1916 }
1917 }
1918 mutex_unlock(&team->lock);
1919 return err;
1920 }
1921 #endif
1922
1923 static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
1924 {
1925 struct team *team = netdev_priv(dev);
1926 int err;
1927
1928 mutex_lock(&team->lock);
1929 err = team_port_add(team, port_dev);
1930 mutex_unlock(&team->lock);
1931 return err;
1932 }
1933
1934 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1935 {
1936 struct team *team = netdev_priv(dev);
1937 int err;
1938
1939 mutex_lock(&team->lock);
1940 err = team_port_del(team, port_dev);
1941 mutex_unlock(&team->lock);
1942 return err;
1943 }
1944
1945 static netdev_features_t team_fix_features(struct net_device *dev,
1946 netdev_features_t features)
1947 {
1948 struct team_port *port;
1949 struct team *team = netdev_priv(dev);
1950 netdev_features_t mask;
1951
1952 mask = features;
1953 features &= ~NETIF_F_ONE_FOR_ALL;
1954 features |= NETIF_F_ALL_FOR_ALL;
1955
1956 rcu_read_lock();
1957 list_for_each_entry_rcu(port, &team->port_list, list) {
1958 features = netdev_increment_features(features,
1959 port->dev->features,
1960 mask);
1961 }
1962 rcu_read_unlock();
1963
1964 features = netdev_add_tso_features(features, mask);
1965
1966 return features;
1967 }
1968
1969 static int team_change_carrier(struct net_device *dev, bool new_carrier)
1970 {
1971 struct team *team = netdev_priv(dev);
1972
1973 team->user_carrier_enabled = true;
1974
1975 if (new_carrier)
1976 netif_carrier_on(dev);
1977 else
1978 netif_carrier_off(dev);
1979 return 0;
1980 }
1981
1982 static const struct net_device_ops team_netdev_ops = {
1983 .ndo_init = team_init,
1984 .ndo_uninit = team_uninit,
1985 .ndo_open = team_open,
1986 .ndo_stop = team_close,
1987 .ndo_start_xmit = team_xmit,
1988 .ndo_select_queue = team_select_queue,
1989 .ndo_change_rx_flags = team_change_rx_flags,
1990 .ndo_set_rx_mode = team_set_rx_mode,
1991 .ndo_set_mac_address = team_set_mac_address,
1992 .ndo_change_mtu = team_change_mtu,
1993 .ndo_get_stats64 = team_get_stats64,
1994 .ndo_vlan_rx_add_vid = team_vlan_rx_add_vid,
1995 .ndo_vlan_rx_kill_vid = team_vlan_rx_kill_vid,
1996 #ifdef CONFIG_NET_POLL_CONTROLLER
1997 .ndo_poll_controller = team_poll_controller,
1998 .ndo_netpoll_setup = team_netpoll_setup,
1999 .ndo_netpoll_cleanup = team_netpoll_cleanup,
2000 #endif
2001 .ndo_add_slave = team_add_slave,
2002 .ndo_del_slave = team_del_slave,
2003 .ndo_fix_features = team_fix_features,
2004 .ndo_change_carrier = team_change_carrier,
2005 .ndo_bridge_setlink = switchdev_port_bridge_setlink,
2006 .ndo_bridge_getlink = switchdev_port_bridge_getlink,
2007 .ndo_bridge_dellink = switchdev_port_bridge_dellink,
2008 .ndo_fdb_add = switchdev_port_fdb_add,
2009 .ndo_fdb_del = switchdev_port_fdb_del,
2010 .ndo_fdb_dump = switchdev_port_fdb_dump,
2011 .ndo_features_check = passthru_features_check,
2012 };
2013
2014 /***********************
2015 * ethtool interface
2016 ***********************/
2017
2018 static void team_ethtool_get_drvinfo(struct net_device *dev,
2019 struct ethtool_drvinfo *drvinfo)
2020 {
2021 strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
2022 strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2023 }
2024
2025 static const struct ethtool_ops team_ethtool_ops = {
2026 .get_drvinfo = team_ethtool_get_drvinfo,
2027 .get_link = ethtool_op_get_link,
2028 };
2029
2030 /***********************
2031 * rt netlink interface
2032 ***********************/
2033
2034 static void team_setup_by_port(struct net_device *dev,
2035 struct net_device *port_dev)
2036 {
2037 dev->header_ops = port_dev->header_ops;
2038 dev->type = port_dev->type;
2039 dev->hard_header_len = port_dev->hard_header_len;
2040 dev->addr_len = port_dev->addr_len;
2041 dev->mtu = port_dev->mtu;
2042 memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2043 eth_hw_addr_inherit(dev, port_dev);
2044 }
2045
2046 static int team_dev_type_check_change(struct net_device *dev,
2047 struct net_device *port_dev)
2048 {
2049 struct team *team = netdev_priv(dev);
2050 char *portname = port_dev->name;
2051 int err;
2052
2053 if (dev->type == port_dev->type)
2054 return 0;
2055 if (!list_empty(&team->port_list)) {
2056 netdev_err(dev, "Device %s is of different type\n", portname);
2057 return -EBUSY;
2058 }
2059 err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2060 err = notifier_to_errno(err);
2061 if (err) {
2062 netdev_err(dev, "Refused to change device type\n");
2063 return err;
2064 }
2065 dev_uc_flush(dev);
2066 dev_mc_flush(dev);
2067 team_setup_by_port(dev, port_dev);
2068 call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2069 return 0;
2070 }
2071
2072 static void team_setup(struct net_device *dev)
2073 {
2074 ether_setup(dev);
2075
2076 dev->netdev_ops = &team_netdev_ops;
2077 dev->ethtool_ops = &team_ethtool_ops;
2078 dev->destructor = team_destructor;
2079 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2080 dev->priv_flags |= IFF_NO_QUEUE;
2081 dev->priv_flags |= IFF_TEAM;
2082
2083 /*
2084 * Indicate we support unicast address filtering. That way core won't
2085 * bring us to promisc mode in case a unicast addr is added.
2086 * Let this up to underlay drivers.
2087 */
2088 dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2089
2090 dev->features |= NETIF_F_LLTX;
2091 dev->features |= NETIF_F_GRO;
2092
2093 /* Don't allow team devices to change network namespaces. */
2094 dev->features |= NETIF_F_NETNS_LOCAL;
2095
2096 dev->hw_features = TEAM_VLAN_FEATURES |
2097 NETIF_F_HW_VLAN_CTAG_TX |
2098 NETIF_F_HW_VLAN_CTAG_RX |
2099 NETIF_F_HW_VLAN_CTAG_FILTER;
2100
2101 dev->hw_features |= NETIF_F_GSO_ENCAP_ALL;
2102 dev->features |= dev->hw_features;
2103 }
2104
2105 static int team_newlink(struct net *src_net, struct net_device *dev,
2106 struct nlattr *tb[], struct nlattr *data[])
2107 {
2108 if (tb[IFLA_ADDRESS] == NULL)
2109 eth_hw_addr_random(dev);
2110
2111 return register_netdevice(dev);
2112 }
2113
2114 static int team_validate(struct nlattr *tb[], struct nlattr *data[])
2115 {
2116 if (tb[IFLA_ADDRESS]) {
2117 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2118 return -EINVAL;
2119 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2120 return -EADDRNOTAVAIL;
2121 }
2122 return 0;
2123 }
2124
2125 static unsigned int team_get_num_tx_queues(void)
2126 {
2127 return TEAM_DEFAULT_NUM_TX_QUEUES;
2128 }
2129
2130 static unsigned int team_get_num_rx_queues(void)
2131 {
2132 return TEAM_DEFAULT_NUM_RX_QUEUES;
2133 }
2134
2135 static struct rtnl_link_ops team_link_ops __read_mostly = {
2136 .kind = DRV_NAME,
2137 .priv_size = sizeof(struct team),
2138 .setup = team_setup,
2139 .newlink = team_newlink,
2140 .validate = team_validate,
2141 .get_num_tx_queues = team_get_num_tx_queues,
2142 .get_num_rx_queues = team_get_num_rx_queues,
2143 };
2144
2145
2146 /***********************************
2147 * Generic netlink custom interface
2148 ***********************************/
2149
2150 static struct genl_family team_nl_family;
2151
2152 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2153 [TEAM_ATTR_UNSPEC] = { .type = NLA_UNSPEC, },
2154 [TEAM_ATTR_TEAM_IFINDEX] = { .type = NLA_U32 },
2155 [TEAM_ATTR_LIST_OPTION] = { .type = NLA_NESTED },
2156 [TEAM_ATTR_LIST_PORT] = { .type = NLA_NESTED },
2157 };
2158
2159 static const struct nla_policy
2160 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2161 [TEAM_ATTR_OPTION_UNSPEC] = { .type = NLA_UNSPEC, },
2162 [TEAM_ATTR_OPTION_NAME] = {
2163 .type = NLA_STRING,
2164 .len = TEAM_STRING_MAX_LEN,
2165 },
2166 [TEAM_ATTR_OPTION_CHANGED] = { .type = NLA_FLAG },
2167 [TEAM_ATTR_OPTION_TYPE] = { .type = NLA_U8 },
2168 [TEAM_ATTR_OPTION_DATA] = { .type = NLA_BINARY },
2169 };
2170
2171 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2172 {
2173 struct sk_buff *msg;
2174 void *hdr;
2175 int err;
2176
2177 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2178 if (!msg)
2179 return -ENOMEM;
2180
2181 hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2182 &team_nl_family, 0, TEAM_CMD_NOOP);
2183 if (!hdr) {
2184 err = -EMSGSIZE;
2185 goto err_msg_put;
2186 }
2187
2188 genlmsg_end(msg, hdr);
2189
2190 return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2191
2192 err_msg_put:
2193 nlmsg_free(msg);
2194
2195 return err;
2196 }
2197
2198 /*
2199 * Netlink cmd functions should be locked by following two functions.
2200 * Since dev gets held here, that ensures dev won't disappear in between.
2201 */
2202 static struct team *team_nl_team_get(struct genl_info *info)
2203 {
2204 struct net *net = genl_info_net(info);
2205 int ifindex;
2206 struct net_device *dev;
2207 struct team *team;
2208
2209 if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2210 return NULL;
2211
2212 ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2213 dev = dev_get_by_index(net, ifindex);
2214 if (!dev || dev->netdev_ops != &team_netdev_ops) {
2215 if (dev)
2216 dev_put(dev);
2217 return NULL;
2218 }
2219
2220 team = netdev_priv(dev);
2221 mutex_lock(&team->lock);
2222 return team;
2223 }
2224
2225 static void team_nl_team_put(struct team *team)
2226 {
2227 mutex_unlock(&team->lock);
2228 dev_put(team->dev);
2229 }
2230
2231 typedef int team_nl_send_func_t(struct sk_buff *skb,
2232 struct team *team, u32 portid);
2233
2234 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2235 {
2236 return genlmsg_unicast(dev_net(team->dev), skb, portid);
2237 }
2238
2239 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2240 struct team_option_inst *opt_inst)
2241 {
2242 struct nlattr *option_item;
2243 struct team_option *option = opt_inst->option;
2244 struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2245 struct team_gsetter_ctx ctx;
2246 int err;
2247
2248 ctx.info = opt_inst_info;
2249 err = team_option_get(team, opt_inst, &ctx);
2250 if (err)
2251 return err;
2252
2253 option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
2254 if (!option_item)
2255 return -EMSGSIZE;
2256
2257 if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2258 goto nest_cancel;
2259 if (opt_inst_info->port &&
2260 nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2261 opt_inst_info->port->dev->ifindex))
2262 goto nest_cancel;
2263 if (opt_inst->option->array_size &&
2264 nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2265 opt_inst_info->array_index))
2266 goto nest_cancel;
2267
2268 switch (option->type) {
2269 case TEAM_OPTION_TYPE_U32:
2270 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2271 goto nest_cancel;
2272 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2273 goto nest_cancel;
2274 break;
2275 case TEAM_OPTION_TYPE_STRING:
2276 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2277 goto nest_cancel;
2278 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2279 ctx.data.str_val))
2280 goto nest_cancel;
2281 break;
2282 case TEAM_OPTION_TYPE_BINARY:
2283 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2284 goto nest_cancel;
2285 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2286 ctx.data.bin_val.ptr))
2287 goto nest_cancel;
2288 break;
2289 case TEAM_OPTION_TYPE_BOOL:
2290 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2291 goto nest_cancel;
2292 if (ctx.data.bool_val &&
2293 nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2294 goto nest_cancel;
2295 break;
2296 case TEAM_OPTION_TYPE_S32:
2297 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2298 goto nest_cancel;
2299 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2300 goto nest_cancel;
2301 break;
2302 default:
2303 BUG();
2304 }
2305 if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2306 goto nest_cancel;
2307 if (opt_inst->changed) {
2308 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2309 goto nest_cancel;
2310 opt_inst->changed = false;
2311 }
2312 nla_nest_end(skb, option_item);
2313 return 0;
2314
2315 nest_cancel:
2316 nla_nest_cancel(skb, option_item);
2317 return -EMSGSIZE;
2318 }
2319
2320 static int __send_and_alloc_skb(struct sk_buff **pskb,
2321 struct team *team, u32 portid,
2322 team_nl_send_func_t *send_func)
2323 {
2324 int err;
2325
2326 if (*pskb) {
2327 err = send_func(*pskb, team, portid);
2328 if (err)
2329 return err;
2330 }
2331 *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2332 if (!*pskb)
2333 return -ENOMEM;
2334 return 0;
2335 }
2336
2337 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2338 int flags, team_nl_send_func_t *send_func,
2339 struct list_head *sel_opt_inst_list)
2340 {
2341 struct nlattr *option_list;
2342 struct nlmsghdr *nlh;
2343 void *hdr;
2344 struct team_option_inst *opt_inst;
2345 int err;
2346 struct sk_buff *skb = NULL;
2347 bool incomplete;
2348 int i;
2349
2350 opt_inst = list_first_entry(sel_opt_inst_list,
2351 struct team_option_inst, tmp_list);
2352
2353 start_again:
2354 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2355 if (err)
2356 return err;
2357
2358 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2359 TEAM_CMD_OPTIONS_GET);
2360 if (!hdr)
2361 return -EMSGSIZE;
2362
2363 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2364 goto nla_put_failure;
2365 option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2366 if (!option_list)
2367 goto nla_put_failure;
2368
2369 i = 0;
2370 incomplete = false;
2371 list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2372 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2373 if (err) {
2374 if (err == -EMSGSIZE) {
2375 if (!i)
2376 goto errout;
2377 incomplete = true;
2378 break;
2379 }
2380 goto errout;
2381 }
2382 i++;
2383 }
2384
2385 nla_nest_end(skb, option_list);
2386 genlmsg_end(skb, hdr);
2387 if (incomplete)
2388 goto start_again;
2389
2390 send_done:
2391 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2392 if (!nlh) {
2393 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2394 if (err)
2395 goto errout;
2396 goto send_done;
2397 }
2398
2399 return send_func(skb, team, portid);
2400
2401 nla_put_failure:
2402 err = -EMSGSIZE;
2403 errout:
2404 genlmsg_cancel(skb, hdr);
2405 nlmsg_free(skb);
2406 return err;
2407 }
2408
2409 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2410 {
2411 struct team *team;
2412 struct team_option_inst *opt_inst;
2413 int err;
2414 LIST_HEAD(sel_opt_inst_list);
2415
2416 team = team_nl_team_get(info);
2417 if (!team)
2418 return -EINVAL;
2419
2420 list_for_each_entry(opt_inst, &team->option_inst_list, list)
2421 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2422 err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2423 NLM_F_ACK, team_nl_send_unicast,
2424 &sel_opt_inst_list);
2425
2426 team_nl_team_put(team);
2427
2428 return err;
2429 }
2430
2431 static int team_nl_send_event_options_get(struct team *team,
2432 struct list_head *sel_opt_inst_list);
2433
2434 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2435 {
2436 struct team *team;
2437 int err = 0;
2438 int i;
2439 struct nlattr *nl_option;
2440 LIST_HEAD(opt_inst_list);
2441
2442 rtnl_lock();
2443
2444 team = team_nl_team_get(info);
2445 if (!team) {
2446 err = -EINVAL;
2447 goto rtnl_unlock;
2448 }
2449
2450 err = -EINVAL;
2451 if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2452 err = -EINVAL;
2453 goto team_put;
2454 }
2455
2456 nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2457 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2458 struct nlattr *attr;
2459 struct nlattr *attr_data;
2460 enum team_option_type opt_type;
2461 int opt_port_ifindex = 0; /* != 0 for per-port options */
2462 u32 opt_array_index = 0;
2463 bool opt_is_array = false;
2464 struct team_option_inst *opt_inst;
2465 char *opt_name;
2466 bool opt_found = false;
2467
2468 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2469 err = -EINVAL;
2470 goto team_put;
2471 }
2472 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2473 nl_option, team_nl_option_policy);
2474 if (err)
2475 goto team_put;
2476 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2477 !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2478 err = -EINVAL;
2479 goto team_put;
2480 }
2481 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2482 case NLA_U32:
2483 opt_type = TEAM_OPTION_TYPE_U32;
2484 break;
2485 case NLA_STRING:
2486 opt_type = TEAM_OPTION_TYPE_STRING;
2487 break;
2488 case NLA_BINARY:
2489 opt_type = TEAM_OPTION_TYPE_BINARY;
2490 break;
2491 case NLA_FLAG:
2492 opt_type = TEAM_OPTION_TYPE_BOOL;
2493 break;
2494 case NLA_S32:
2495 opt_type = TEAM_OPTION_TYPE_S32;
2496 break;
2497 default:
2498 goto team_put;
2499 }
2500
2501 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2502 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2503 err = -EINVAL;
2504 goto team_put;
2505 }
2506
2507 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2508 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2509 if (attr)
2510 opt_port_ifindex = nla_get_u32(attr);
2511
2512 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2513 if (attr) {
2514 opt_is_array = true;
2515 opt_array_index = nla_get_u32(attr);
2516 }
2517
2518 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2519 struct team_option *option = opt_inst->option;
2520 struct team_gsetter_ctx ctx;
2521 struct team_option_inst_info *opt_inst_info;
2522 int tmp_ifindex;
2523
2524 opt_inst_info = &opt_inst->info;
2525 tmp_ifindex = opt_inst_info->port ?
2526 opt_inst_info->port->dev->ifindex : 0;
2527 if (option->type != opt_type ||
2528 strcmp(option->name, opt_name) ||
2529 tmp_ifindex != opt_port_ifindex ||
2530 (option->array_size && !opt_is_array) ||
2531 opt_inst_info->array_index != opt_array_index)
2532 continue;
2533 opt_found = true;
2534 ctx.info = opt_inst_info;
2535 switch (opt_type) {
2536 case TEAM_OPTION_TYPE_U32:
2537 ctx.data.u32_val = nla_get_u32(attr_data);
2538 break;
2539 case TEAM_OPTION_TYPE_STRING:
2540 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2541 err = -EINVAL;
2542 goto team_put;
2543 }
2544 ctx.data.str_val = nla_data(attr_data);
2545 break;
2546 case TEAM_OPTION_TYPE_BINARY:
2547 ctx.data.bin_val.len = nla_len(attr_data);
2548 ctx.data.bin_val.ptr = nla_data(attr_data);
2549 break;
2550 case TEAM_OPTION_TYPE_BOOL:
2551 ctx.data.bool_val = attr_data ? true : false;
2552 break;
2553 case TEAM_OPTION_TYPE_S32:
2554 ctx.data.s32_val = nla_get_s32(attr_data);
2555 break;
2556 default:
2557 BUG();
2558 }
2559 err = team_option_set(team, opt_inst, &ctx);
2560 if (err)
2561 goto team_put;
2562 opt_inst->changed = true;
2563 list_add(&opt_inst->tmp_list, &opt_inst_list);
2564 }
2565 if (!opt_found) {
2566 err = -ENOENT;
2567 goto team_put;
2568 }
2569 }
2570
2571 err = team_nl_send_event_options_get(team, &opt_inst_list);
2572
2573 team_put:
2574 team_nl_team_put(team);
2575 rtnl_unlock:
2576 rtnl_unlock();
2577 return err;
2578 }
2579
2580 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2581 struct team_port *port)
2582 {
2583 struct nlattr *port_item;
2584
2585 port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2586 if (!port_item)
2587 goto nest_cancel;
2588 if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2589 goto nest_cancel;
2590 if (port->changed) {
2591 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2592 goto nest_cancel;
2593 port->changed = false;
2594 }
2595 if ((port->removed &&
2596 nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2597 (port->state.linkup &&
2598 nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2599 nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2600 nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2601 goto nest_cancel;
2602 nla_nest_end(skb, port_item);
2603 return 0;
2604
2605 nest_cancel:
2606 nla_nest_cancel(skb, port_item);
2607 return -EMSGSIZE;
2608 }
2609
2610 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2611 int flags, team_nl_send_func_t *send_func,
2612 struct team_port *one_port)
2613 {
2614 struct nlattr *port_list;
2615 struct nlmsghdr *nlh;
2616 void *hdr;
2617 struct team_port *port;
2618 int err;
2619 struct sk_buff *skb = NULL;
2620 bool incomplete;
2621 int i;
2622
2623 port = list_first_entry_or_null(&team->port_list,
2624 struct team_port, list);
2625
2626 start_again:
2627 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2628 if (err)
2629 return err;
2630
2631 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2632 TEAM_CMD_PORT_LIST_GET);
2633 if (!hdr)
2634 return -EMSGSIZE;
2635
2636 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2637 goto nla_put_failure;
2638 port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2639 if (!port_list)
2640 goto nla_put_failure;
2641
2642 i = 0;
2643 incomplete = false;
2644
2645 /* If one port is selected, called wants to send port list containing
2646 * only this port. Otherwise go through all listed ports and send all
2647 */
2648 if (one_port) {
2649 err = team_nl_fill_one_port_get(skb, one_port);
2650 if (err)
2651 goto errout;
2652 } else if (port) {
2653 list_for_each_entry_from(port, &team->port_list, list) {
2654 err = team_nl_fill_one_port_get(skb, port);
2655 if (err) {
2656 if (err == -EMSGSIZE) {
2657 if (!i)
2658 goto errout;
2659 incomplete = true;
2660 break;
2661 }
2662 goto errout;
2663 }
2664 i++;
2665 }
2666 }
2667
2668 nla_nest_end(skb, port_list);
2669 genlmsg_end(skb, hdr);
2670 if (incomplete)
2671 goto start_again;
2672
2673 send_done:
2674 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2675 if (!nlh) {
2676 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2677 if (err)
2678 goto errout;
2679 goto send_done;
2680 }
2681
2682 return send_func(skb, team, portid);
2683
2684 nla_put_failure:
2685 err = -EMSGSIZE;
2686 errout:
2687 genlmsg_cancel(skb, hdr);
2688 nlmsg_free(skb);
2689 return err;
2690 }
2691
2692 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2693 struct genl_info *info)
2694 {
2695 struct team *team;
2696 int err;
2697
2698 team = team_nl_team_get(info);
2699 if (!team)
2700 return -EINVAL;
2701
2702 err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2703 NLM_F_ACK, team_nl_send_unicast, NULL);
2704
2705 team_nl_team_put(team);
2706
2707 return err;
2708 }
2709
2710 static const struct genl_ops team_nl_ops[] = {
2711 {
2712 .cmd = TEAM_CMD_NOOP,
2713 .doit = team_nl_cmd_noop,
2714 .policy = team_nl_policy,
2715 },
2716 {
2717 .cmd = TEAM_CMD_OPTIONS_SET,
2718 .doit = team_nl_cmd_options_set,
2719 .policy = team_nl_policy,
2720 .flags = GENL_ADMIN_PERM,
2721 },
2722 {
2723 .cmd = TEAM_CMD_OPTIONS_GET,
2724 .doit = team_nl_cmd_options_get,
2725 .policy = team_nl_policy,
2726 .flags = GENL_ADMIN_PERM,
2727 },
2728 {
2729 .cmd = TEAM_CMD_PORT_LIST_GET,
2730 .doit = team_nl_cmd_port_list_get,
2731 .policy = team_nl_policy,
2732 .flags = GENL_ADMIN_PERM,
2733 },
2734 };
2735
2736 static const struct genl_multicast_group team_nl_mcgrps[] = {
2737 { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2738 };
2739
2740 static struct genl_family team_nl_family __ro_after_init = {
2741 .name = TEAM_GENL_NAME,
2742 .version = TEAM_GENL_VERSION,
2743 .maxattr = TEAM_ATTR_MAX,
2744 .netnsok = true,
2745 .module = THIS_MODULE,
2746 .ops = team_nl_ops,
2747 .n_ops = ARRAY_SIZE(team_nl_ops),
2748 .mcgrps = team_nl_mcgrps,
2749 .n_mcgrps = ARRAY_SIZE(team_nl_mcgrps),
2750 };
2751
2752 static int team_nl_send_multicast(struct sk_buff *skb,
2753 struct team *team, u32 portid)
2754 {
2755 return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2756 skb, 0, 0, GFP_KERNEL);
2757 }
2758
2759 static int team_nl_send_event_options_get(struct team *team,
2760 struct list_head *sel_opt_inst_list)
2761 {
2762 return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2763 sel_opt_inst_list);
2764 }
2765
2766 static int team_nl_send_event_port_get(struct team *team,
2767 struct team_port *port)
2768 {
2769 return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2770 port);
2771 }
2772
2773 static int __init team_nl_init(void)
2774 {
2775 return genl_register_family(&team_nl_family);
2776 }
2777
2778 static void team_nl_fini(void)
2779 {
2780 genl_unregister_family(&team_nl_family);
2781 }
2782
2783
2784 /******************
2785 * Change checkers
2786 ******************/
2787
2788 static void __team_options_change_check(struct team *team)
2789 {
2790 int err;
2791 struct team_option_inst *opt_inst;
2792 LIST_HEAD(sel_opt_inst_list);
2793
2794 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2795 if (opt_inst->changed)
2796 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2797 }
2798 err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2799 if (err && err != -ESRCH)
2800 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2801 err);
2802 }
2803
2804 /* rtnl lock is held */
2805
2806 static void __team_port_change_send(struct team_port *port, bool linkup)
2807 {
2808 int err;
2809
2810 port->changed = true;
2811 port->state.linkup = linkup;
2812 team_refresh_port_linkup(port);
2813 if (linkup) {
2814 struct ethtool_link_ksettings ecmd;
2815
2816 err = __ethtool_get_link_ksettings(port->dev, &ecmd);
2817 if (!err) {
2818 port->state.speed = ecmd.base.speed;
2819 port->state.duplex = ecmd.base.duplex;
2820 goto send_event;
2821 }
2822 }
2823 port->state.speed = 0;
2824 port->state.duplex = 0;
2825
2826 send_event:
2827 err = team_nl_send_event_port_get(port->team, port);
2828 if (err && err != -ESRCH)
2829 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2830 port->dev->name, err);
2831
2832 }
2833
2834 static void __team_carrier_check(struct team *team)
2835 {
2836 struct team_port *port;
2837 bool team_linkup;
2838
2839 if (team->user_carrier_enabled)
2840 return;
2841
2842 team_linkup = false;
2843 list_for_each_entry(port, &team->port_list, list) {
2844 if (port->linkup) {
2845 team_linkup = true;
2846 break;
2847 }
2848 }
2849
2850 if (team_linkup)
2851 netif_carrier_on(team->dev);
2852 else
2853 netif_carrier_off(team->dev);
2854 }
2855
2856 static void __team_port_change_check(struct team_port *port, bool linkup)
2857 {
2858 if (port->state.linkup != linkup)
2859 __team_port_change_send(port, linkup);
2860 __team_carrier_check(port->team);
2861 }
2862
2863 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2864 {
2865 __team_port_change_send(port, linkup);
2866 __team_carrier_check(port->team);
2867 }
2868
2869 static void __team_port_change_port_removed(struct team_port *port)
2870 {
2871 port->removed = true;
2872 __team_port_change_send(port, false);
2873 __team_carrier_check(port->team);
2874 }
2875
2876 static void team_port_change_check(struct team_port *port, bool linkup)
2877 {
2878 struct team *team = port->team;
2879
2880 mutex_lock(&team->lock);
2881 __team_port_change_check(port, linkup);
2882 mutex_unlock(&team->lock);
2883 }
2884
2885
2886 /************************************
2887 * Net device notifier event handler
2888 ************************************/
2889
2890 static int team_device_event(struct notifier_block *unused,
2891 unsigned long event, void *ptr)
2892 {
2893 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2894 struct team_port *port;
2895
2896 port = team_port_get_rtnl(dev);
2897 if (!port)
2898 return NOTIFY_DONE;
2899
2900 switch (event) {
2901 case NETDEV_UP:
2902 if (netif_carrier_ok(dev))
2903 team_port_change_check(port, true);
2904 break;
2905 case NETDEV_DOWN:
2906 team_port_change_check(port, false);
2907 break;
2908 case NETDEV_CHANGE:
2909 if (netif_running(port->dev))
2910 team_port_change_check(port,
2911 !!netif_carrier_ok(port->dev));
2912 break;
2913 case NETDEV_UNREGISTER:
2914 team_del_slave(port->team->dev, dev);
2915 break;
2916 case NETDEV_FEAT_CHANGE:
2917 team_compute_features(port->team);
2918 break;
2919 case NETDEV_PRECHANGEMTU:
2920 /* Forbid to change mtu of underlaying device */
2921 if (!port->team->port_mtu_change_allowed)
2922 return NOTIFY_BAD;
2923 break;
2924 case NETDEV_PRE_TYPE_CHANGE:
2925 /* Forbid to change type of underlaying device */
2926 return NOTIFY_BAD;
2927 case NETDEV_RESEND_IGMP:
2928 /* Propagate to master device */
2929 call_netdevice_notifiers(event, port->team->dev);
2930 break;
2931 }
2932 return NOTIFY_DONE;
2933 }
2934
2935 static struct notifier_block team_notifier_block __read_mostly = {
2936 .notifier_call = team_device_event,
2937 };
2938
2939
2940 /***********************
2941 * Module init and exit
2942 ***********************/
2943
2944 static int __init team_module_init(void)
2945 {
2946 int err;
2947
2948 register_netdevice_notifier(&team_notifier_block);
2949
2950 err = rtnl_link_register(&team_link_ops);
2951 if (err)
2952 goto err_rtnl_reg;
2953
2954 err = team_nl_init();
2955 if (err)
2956 goto err_nl_init;
2957
2958 return 0;
2959
2960 err_nl_init:
2961 rtnl_link_unregister(&team_link_ops);
2962
2963 err_rtnl_reg:
2964 unregister_netdevice_notifier(&team_notifier_block);
2965
2966 return err;
2967 }
2968
2969 static void __exit team_module_exit(void)
2970 {
2971 team_nl_fini();
2972 rtnl_link_unregister(&team_link_ops);
2973 unregister_netdevice_notifier(&team_notifier_block);
2974 }
2975
2976 module_init(team_module_init);
2977 module_exit(team_module_exit);
2978
2979 MODULE_LICENSE("GPL v2");
2980 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
2981 MODULE_DESCRIPTION("Ethernet team device driver");
2982 MODULE_ALIAS_RTNL_LINK(DRV_NAME);
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