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Merge tag 'm68k-for-v4.8-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert...
[mirror_ubuntu-artful-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 static struct lock_class_key team_netdev_xmit_lock_key;
1580 static struct lock_class_key team_netdev_addr_lock_key;
1581 static struct lock_class_key team_tx_busylock_key;
1582
1583 static void team_set_lockdep_class_one(struct net_device *dev,
1584 struct netdev_queue *txq,
1585 void *unused)
1586 {
1587 lockdep_set_class(&txq->_xmit_lock, &team_netdev_xmit_lock_key);
1588 }
1589
1590 static void team_set_lockdep_class(struct net_device *dev)
1591 {
1592 lockdep_set_class(&dev->addr_list_lock, &team_netdev_addr_lock_key);
1593 netdev_for_each_tx_queue(dev, team_set_lockdep_class_one, NULL);
1594 dev->qdisc_tx_busylock = &team_tx_busylock_key;
1595 }
1596
1597 static int team_init(struct net_device *dev)
1598 {
1599 struct team *team = netdev_priv(dev);
1600 int i;
1601 int err;
1602
1603 team->dev = dev;
1604 mutex_init(&team->lock);
1605 team_set_no_mode(team);
1606
1607 team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1608 if (!team->pcpu_stats)
1609 return -ENOMEM;
1610
1611 for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1612 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1613 INIT_LIST_HEAD(&team->port_list);
1614 err = team_queue_override_init(team);
1615 if (err)
1616 goto err_team_queue_override_init;
1617
1618 team_adjust_ops(team);
1619
1620 INIT_LIST_HEAD(&team->option_list);
1621 INIT_LIST_HEAD(&team->option_inst_list);
1622
1623 team_notify_peers_init(team);
1624 team_mcast_rejoin_init(team);
1625
1626 err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1627 if (err)
1628 goto err_options_register;
1629 netif_carrier_off(dev);
1630
1631 team_set_lockdep_class(dev);
1632
1633 return 0;
1634
1635 err_options_register:
1636 team_mcast_rejoin_fini(team);
1637 team_notify_peers_fini(team);
1638 team_queue_override_fini(team);
1639 err_team_queue_override_init:
1640 free_percpu(team->pcpu_stats);
1641
1642 return err;
1643 }
1644
1645 static void team_uninit(struct net_device *dev)
1646 {
1647 struct team *team = netdev_priv(dev);
1648 struct team_port *port;
1649 struct team_port *tmp;
1650
1651 mutex_lock(&team->lock);
1652 list_for_each_entry_safe(port, tmp, &team->port_list, list)
1653 team_port_del(team, port->dev);
1654
1655 __team_change_mode(team, NULL); /* cleanup */
1656 __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1657 team_mcast_rejoin_fini(team);
1658 team_notify_peers_fini(team);
1659 team_queue_override_fini(team);
1660 mutex_unlock(&team->lock);
1661 }
1662
1663 static void team_destructor(struct net_device *dev)
1664 {
1665 struct team *team = netdev_priv(dev);
1666
1667 free_percpu(team->pcpu_stats);
1668 free_netdev(dev);
1669 }
1670
1671 static int team_open(struct net_device *dev)
1672 {
1673 return 0;
1674 }
1675
1676 static int team_close(struct net_device *dev)
1677 {
1678 return 0;
1679 }
1680
1681 /*
1682 * note: already called with rcu_read_lock
1683 */
1684 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1685 {
1686 struct team *team = netdev_priv(dev);
1687 bool tx_success;
1688 unsigned int len = skb->len;
1689
1690 tx_success = team_queue_override_transmit(team, skb);
1691 if (!tx_success)
1692 tx_success = team->ops.transmit(team, skb);
1693 if (tx_success) {
1694 struct team_pcpu_stats *pcpu_stats;
1695
1696 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1697 u64_stats_update_begin(&pcpu_stats->syncp);
1698 pcpu_stats->tx_packets++;
1699 pcpu_stats->tx_bytes += len;
1700 u64_stats_update_end(&pcpu_stats->syncp);
1701 } else {
1702 this_cpu_inc(team->pcpu_stats->tx_dropped);
1703 }
1704
1705 return NETDEV_TX_OK;
1706 }
1707
1708 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1709 void *accel_priv, select_queue_fallback_t fallback)
1710 {
1711 /*
1712 * This helper function exists to help dev_pick_tx get the correct
1713 * destination queue. Using a helper function skips a call to
1714 * skb_tx_hash and will put the skbs in the queue we expect on their
1715 * way down to the team driver.
1716 */
1717 u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1718
1719 /*
1720 * Save the original txq to restore before passing to the driver
1721 */
1722 qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1723
1724 if (unlikely(txq >= dev->real_num_tx_queues)) {
1725 do {
1726 txq -= dev->real_num_tx_queues;
1727 } while (txq >= dev->real_num_tx_queues);
1728 }
1729 return txq;
1730 }
1731
1732 static void team_change_rx_flags(struct net_device *dev, int change)
1733 {
1734 struct team *team = netdev_priv(dev);
1735 struct team_port *port;
1736 int inc;
1737
1738 rcu_read_lock();
1739 list_for_each_entry_rcu(port, &team->port_list, list) {
1740 if (change & IFF_PROMISC) {
1741 inc = dev->flags & IFF_PROMISC ? 1 : -1;
1742 dev_set_promiscuity(port->dev, inc);
1743 }
1744 if (change & IFF_ALLMULTI) {
1745 inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1746 dev_set_allmulti(port->dev, inc);
1747 }
1748 }
1749 rcu_read_unlock();
1750 }
1751
1752 static void team_set_rx_mode(struct net_device *dev)
1753 {
1754 struct team *team = netdev_priv(dev);
1755 struct team_port *port;
1756
1757 rcu_read_lock();
1758 list_for_each_entry_rcu(port, &team->port_list, list) {
1759 dev_uc_sync_multiple(port->dev, dev);
1760 dev_mc_sync_multiple(port->dev, dev);
1761 }
1762 rcu_read_unlock();
1763 }
1764
1765 static int team_set_mac_address(struct net_device *dev, void *p)
1766 {
1767 struct sockaddr *addr = p;
1768 struct team *team = netdev_priv(dev);
1769 struct team_port *port;
1770
1771 if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1772 return -EADDRNOTAVAIL;
1773 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1774 mutex_lock(&team->lock);
1775 list_for_each_entry(port, &team->port_list, list)
1776 if (team->ops.port_change_dev_addr)
1777 team->ops.port_change_dev_addr(team, port);
1778 mutex_unlock(&team->lock);
1779 return 0;
1780 }
1781
1782 static int team_change_mtu(struct net_device *dev, int new_mtu)
1783 {
1784 struct team *team = netdev_priv(dev);
1785 struct team_port *port;
1786 int err;
1787
1788 /*
1789 * Alhough this is reader, it's guarded by team lock. It's not possible
1790 * to traverse list in reverse under rcu_read_lock
1791 */
1792 mutex_lock(&team->lock);
1793 team->port_mtu_change_allowed = true;
1794 list_for_each_entry(port, &team->port_list, list) {
1795 err = dev_set_mtu(port->dev, new_mtu);
1796 if (err) {
1797 netdev_err(dev, "Device %s failed to change mtu",
1798 port->dev->name);
1799 goto unwind;
1800 }
1801 }
1802 team->port_mtu_change_allowed = false;
1803 mutex_unlock(&team->lock);
1804
1805 dev->mtu = new_mtu;
1806
1807 return 0;
1808
1809 unwind:
1810 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1811 dev_set_mtu(port->dev, dev->mtu);
1812 team->port_mtu_change_allowed = false;
1813 mutex_unlock(&team->lock);
1814
1815 return err;
1816 }
1817
1818 static struct rtnl_link_stats64 *
1819 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1820 {
1821 struct team *team = netdev_priv(dev);
1822 struct team_pcpu_stats *p;
1823 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1824 u32 rx_dropped = 0, tx_dropped = 0, rx_nohandler = 0;
1825 unsigned int start;
1826 int i;
1827
1828 for_each_possible_cpu(i) {
1829 p = per_cpu_ptr(team->pcpu_stats, i);
1830 do {
1831 start = u64_stats_fetch_begin_irq(&p->syncp);
1832 rx_packets = p->rx_packets;
1833 rx_bytes = p->rx_bytes;
1834 rx_multicast = p->rx_multicast;
1835 tx_packets = p->tx_packets;
1836 tx_bytes = p->tx_bytes;
1837 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
1838
1839 stats->rx_packets += rx_packets;
1840 stats->rx_bytes += rx_bytes;
1841 stats->multicast += rx_multicast;
1842 stats->tx_packets += tx_packets;
1843 stats->tx_bytes += tx_bytes;
1844 /*
1845 * rx_dropped, tx_dropped & rx_nohandler are u32,
1846 * updated without syncp protection.
1847 */
1848 rx_dropped += p->rx_dropped;
1849 tx_dropped += p->tx_dropped;
1850 rx_nohandler += p->rx_nohandler;
1851 }
1852 stats->rx_dropped = rx_dropped;
1853 stats->tx_dropped = tx_dropped;
1854 stats->rx_nohandler = rx_nohandler;
1855 return stats;
1856 }
1857
1858 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1859 {
1860 struct team *team = netdev_priv(dev);
1861 struct team_port *port;
1862 int err;
1863
1864 /*
1865 * Alhough this is reader, it's guarded by team lock. It's not possible
1866 * to traverse list in reverse under rcu_read_lock
1867 */
1868 mutex_lock(&team->lock);
1869 list_for_each_entry(port, &team->port_list, list) {
1870 err = vlan_vid_add(port->dev, proto, vid);
1871 if (err)
1872 goto unwind;
1873 }
1874 mutex_unlock(&team->lock);
1875
1876 return 0;
1877
1878 unwind:
1879 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1880 vlan_vid_del(port->dev, proto, vid);
1881 mutex_unlock(&team->lock);
1882
1883 return err;
1884 }
1885
1886 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1887 {
1888 struct team *team = netdev_priv(dev);
1889 struct team_port *port;
1890
1891 mutex_lock(&team->lock);
1892 list_for_each_entry(port, &team->port_list, list)
1893 vlan_vid_del(port->dev, proto, vid);
1894 mutex_unlock(&team->lock);
1895
1896 return 0;
1897 }
1898
1899 #ifdef CONFIG_NET_POLL_CONTROLLER
1900 static void team_poll_controller(struct net_device *dev)
1901 {
1902 }
1903
1904 static void __team_netpoll_cleanup(struct team *team)
1905 {
1906 struct team_port *port;
1907
1908 list_for_each_entry(port, &team->port_list, list)
1909 team_port_disable_netpoll(port);
1910 }
1911
1912 static void team_netpoll_cleanup(struct net_device *dev)
1913 {
1914 struct team *team = netdev_priv(dev);
1915
1916 mutex_lock(&team->lock);
1917 __team_netpoll_cleanup(team);
1918 mutex_unlock(&team->lock);
1919 }
1920
1921 static int team_netpoll_setup(struct net_device *dev,
1922 struct netpoll_info *npifo)
1923 {
1924 struct team *team = netdev_priv(dev);
1925 struct team_port *port;
1926 int err = 0;
1927
1928 mutex_lock(&team->lock);
1929 list_for_each_entry(port, &team->port_list, list) {
1930 err = team_port_enable_netpoll(team, port);
1931 if (err) {
1932 __team_netpoll_cleanup(team);
1933 break;
1934 }
1935 }
1936 mutex_unlock(&team->lock);
1937 return err;
1938 }
1939 #endif
1940
1941 static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
1942 {
1943 struct team *team = netdev_priv(dev);
1944 int err;
1945
1946 mutex_lock(&team->lock);
1947 err = team_port_add(team, port_dev);
1948 mutex_unlock(&team->lock);
1949 return err;
1950 }
1951
1952 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1953 {
1954 struct team *team = netdev_priv(dev);
1955 int err;
1956
1957 mutex_lock(&team->lock);
1958 err = team_port_del(team, port_dev);
1959 mutex_unlock(&team->lock);
1960 return err;
1961 }
1962
1963 static netdev_features_t team_fix_features(struct net_device *dev,
1964 netdev_features_t features)
1965 {
1966 struct team_port *port;
1967 struct team *team = netdev_priv(dev);
1968 netdev_features_t mask;
1969
1970 mask = features;
1971 features &= ~NETIF_F_ONE_FOR_ALL;
1972 features |= NETIF_F_ALL_FOR_ALL;
1973
1974 rcu_read_lock();
1975 list_for_each_entry_rcu(port, &team->port_list, list) {
1976 features = netdev_increment_features(features,
1977 port->dev->features,
1978 mask);
1979 }
1980 rcu_read_unlock();
1981
1982 features = netdev_add_tso_features(features, mask);
1983
1984 return features;
1985 }
1986
1987 static int team_change_carrier(struct net_device *dev, bool new_carrier)
1988 {
1989 struct team *team = netdev_priv(dev);
1990
1991 team->user_carrier_enabled = true;
1992
1993 if (new_carrier)
1994 netif_carrier_on(dev);
1995 else
1996 netif_carrier_off(dev);
1997 return 0;
1998 }
1999
2000 static const struct net_device_ops team_netdev_ops = {
2001 .ndo_init = team_init,
2002 .ndo_uninit = team_uninit,
2003 .ndo_open = team_open,
2004 .ndo_stop = team_close,
2005 .ndo_start_xmit = team_xmit,
2006 .ndo_select_queue = team_select_queue,
2007 .ndo_change_rx_flags = team_change_rx_flags,
2008 .ndo_set_rx_mode = team_set_rx_mode,
2009 .ndo_set_mac_address = team_set_mac_address,
2010 .ndo_change_mtu = team_change_mtu,
2011 .ndo_get_stats64 = team_get_stats64,
2012 .ndo_vlan_rx_add_vid = team_vlan_rx_add_vid,
2013 .ndo_vlan_rx_kill_vid = team_vlan_rx_kill_vid,
2014 #ifdef CONFIG_NET_POLL_CONTROLLER
2015 .ndo_poll_controller = team_poll_controller,
2016 .ndo_netpoll_setup = team_netpoll_setup,
2017 .ndo_netpoll_cleanup = team_netpoll_cleanup,
2018 #endif
2019 .ndo_add_slave = team_add_slave,
2020 .ndo_del_slave = team_del_slave,
2021 .ndo_fix_features = team_fix_features,
2022 .ndo_change_carrier = team_change_carrier,
2023 .ndo_bridge_setlink = switchdev_port_bridge_setlink,
2024 .ndo_bridge_getlink = switchdev_port_bridge_getlink,
2025 .ndo_bridge_dellink = switchdev_port_bridge_dellink,
2026 .ndo_fdb_add = switchdev_port_fdb_add,
2027 .ndo_fdb_del = switchdev_port_fdb_del,
2028 .ndo_fdb_dump = switchdev_port_fdb_dump,
2029 .ndo_features_check = passthru_features_check,
2030 };
2031
2032 /***********************
2033 * ethtool interface
2034 ***********************/
2035
2036 static void team_ethtool_get_drvinfo(struct net_device *dev,
2037 struct ethtool_drvinfo *drvinfo)
2038 {
2039 strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
2040 strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2041 }
2042
2043 static const struct ethtool_ops team_ethtool_ops = {
2044 .get_drvinfo = team_ethtool_get_drvinfo,
2045 .get_link = ethtool_op_get_link,
2046 };
2047
2048 /***********************
2049 * rt netlink interface
2050 ***********************/
2051
2052 static void team_setup_by_port(struct net_device *dev,
2053 struct net_device *port_dev)
2054 {
2055 dev->header_ops = port_dev->header_ops;
2056 dev->type = port_dev->type;
2057 dev->hard_header_len = port_dev->hard_header_len;
2058 dev->addr_len = port_dev->addr_len;
2059 dev->mtu = port_dev->mtu;
2060 memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2061 eth_hw_addr_inherit(dev, port_dev);
2062 }
2063
2064 static int team_dev_type_check_change(struct net_device *dev,
2065 struct net_device *port_dev)
2066 {
2067 struct team *team = netdev_priv(dev);
2068 char *portname = port_dev->name;
2069 int err;
2070
2071 if (dev->type == port_dev->type)
2072 return 0;
2073 if (!list_empty(&team->port_list)) {
2074 netdev_err(dev, "Device %s is of different type\n", portname);
2075 return -EBUSY;
2076 }
2077 err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2078 err = notifier_to_errno(err);
2079 if (err) {
2080 netdev_err(dev, "Refused to change device type\n");
2081 return err;
2082 }
2083 dev_uc_flush(dev);
2084 dev_mc_flush(dev);
2085 team_setup_by_port(dev, port_dev);
2086 call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2087 return 0;
2088 }
2089
2090 static void team_setup(struct net_device *dev)
2091 {
2092 ether_setup(dev);
2093
2094 dev->netdev_ops = &team_netdev_ops;
2095 dev->ethtool_ops = &team_ethtool_ops;
2096 dev->destructor = team_destructor;
2097 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2098 dev->priv_flags |= IFF_NO_QUEUE;
2099 dev->priv_flags |= IFF_TEAM;
2100
2101 /*
2102 * Indicate we support unicast address filtering. That way core won't
2103 * bring us to promisc mode in case a unicast addr is added.
2104 * Let this up to underlay drivers.
2105 */
2106 dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2107
2108 dev->features |= NETIF_F_LLTX;
2109 dev->features |= NETIF_F_GRO;
2110
2111 /* Don't allow team devices to change network namespaces. */
2112 dev->features |= NETIF_F_NETNS_LOCAL;
2113
2114 dev->hw_features = TEAM_VLAN_FEATURES |
2115 NETIF_F_HW_VLAN_CTAG_TX |
2116 NETIF_F_HW_VLAN_CTAG_RX |
2117 NETIF_F_HW_VLAN_CTAG_FILTER;
2118
2119 dev->hw_features |= NETIF_F_GSO_ENCAP_ALL;
2120 dev->features |= dev->hw_features;
2121 }
2122
2123 static int team_newlink(struct net *src_net, struct net_device *dev,
2124 struct nlattr *tb[], struct nlattr *data[])
2125 {
2126 if (tb[IFLA_ADDRESS] == NULL)
2127 eth_hw_addr_random(dev);
2128
2129 return register_netdevice(dev);
2130 }
2131
2132 static int team_validate(struct nlattr *tb[], struct nlattr *data[])
2133 {
2134 if (tb[IFLA_ADDRESS]) {
2135 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2136 return -EINVAL;
2137 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2138 return -EADDRNOTAVAIL;
2139 }
2140 return 0;
2141 }
2142
2143 static unsigned int team_get_num_tx_queues(void)
2144 {
2145 return TEAM_DEFAULT_NUM_TX_QUEUES;
2146 }
2147
2148 static unsigned int team_get_num_rx_queues(void)
2149 {
2150 return TEAM_DEFAULT_NUM_RX_QUEUES;
2151 }
2152
2153 static struct rtnl_link_ops team_link_ops __read_mostly = {
2154 .kind = DRV_NAME,
2155 .priv_size = sizeof(struct team),
2156 .setup = team_setup,
2157 .newlink = team_newlink,
2158 .validate = team_validate,
2159 .get_num_tx_queues = team_get_num_tx_queues,
2160 .get_num_rx_queues = team_get_num_rx_queues,
2161 };
2162
2163
2164 /***********************************
2165 * Generic netlink custom interface
2166 ***********************************/
2167
2168 static struct genl_family team_nl_family = {
2169 .id = GENL_ID_GENERATE,
2170 .name = TEAM_GENL_NAME,
2171 .version = TEAM_GENL_VERSION,
2172 .maxattr = TEAM_ATTR_MAX,
2173 .netnsok = true,
2174 };
2175
2176 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2177 [TEAM_ATTR_UNSPEC] = { .type = NLA_UNSPEC, },
2178 [TEAM_ATTR_TEAM_IFINDEX] = { .type = NLA_U32 },
2179 [TEAM_ATTR_LIST_OPTION] = { .type = NLA_NESTED },
2180 [TEAM_ATTR_LIST_PORT] = { .type = NLA_NESTED },
2181 };
2182
2183 static const struct nla_policy
2184 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2185 [TEAM_ATTR_OPTION_UNSPEC] = { .type = NLA_UNSPEC, },
2186 [TEAM_ATTR_OPTION_NAME] = {
2187 .type = NLA_STRING,
2188 .len = TEAM_STRING_MAX_LEN,
2189 },
2190 [TEAM_ATTR_OPTION_CHANGED] = { .type = NLA_FLAG },
2191 [TEAM_ATTR_OPTION_TYPE] = { .type = NLA_U8 },
2192 [TEAM_ATTR_OPTION_DATA] = { .type = NLA_BINARY },
2193 };
2194
2195 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2196 {
2197 struct sk_buff *msg;
2198 void *hdr;
2199 int err;
2200
2201 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2202 if (!msg)
2203 return -ENOMEM;
2204
2205 hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2206 &team_nl_family, 0, TEAM_CMD_NOOP);
2207 if (!hdr) {
2208 err = -EMSGSIZE;
2209 goto err_msg_put;
2210 }
2211
2212 genlmsg_end(msg, hdr);
2213
2214 return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2215
2216 err_msg_put:
2217 nlmsg_free(msg);
2218
2219 return err;
2220 }
2221
2222 /*
2223 * Netlink cmd functions should be locked by following two functions.
2224 * Since dev gets held here, that ensures dev won't disappear in between.
2225 */
2226 static struct team *team_nl_team_get(struct genl_info *info)
2227 {
2228 struct net *net = genl_info_net(info);
2229 int ifindex;
2230 struct net_device *dev;
2231 struct team *team;
2232
2233 if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2234 return NULL;
2235
2236 ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2237 dev = dev_get_by_index(net, ifindex);
2238 if (!dev || dev->netdev_ops != &team_netdev_ops) {
2239 if (dev)
2240 dev_put(dev);
2241 return NULL;
2242 }
2243
2244 team = netdev_priv(dev);
2245 mutex_lock(&team->lock);
2246 return team;
2247 }
2248
2249 static void team_nl_team_put(struct team *team)
2250 {
2251 mutex_unlock(&team->lock);
2252 dev_put(team->dev);
2253 }
2254
2255 typedef int team_nl_send_func_t(struct sk_buff *skb,
2256 struct team *team, u32 portid);
2257
2258 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2259 {
2260 return genlmsg_unicast(dev_net(team->dev), skb, portid);
2261 }
2262
2263 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2264 struct team_option_inst *opt_inst)
2265 {
2266 struct nlattr *option_item;
2267 struct team_option *option = opt_inst->option;
2268 struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2269 struct team_gsetter_ctx ctx;
2270 int err;
2271
2272 ctx.info = opt_inst_info;
2273 err = team_option_get(team, opt_inst, &ctx);
2274 if (err)
2275 return err;
2276
2277 option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
2278 if (!option_item)
2279 return -EMSGSIZE;
2280
2281 if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2282 goto nest_cancel;
2283 if (opt_inst_info->port &&
2284 nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2285 opt_inst_info->port->dev->ifindex))
2286 goto nest_cancel;
2287 if (opt_inst->option->array_size &&
2288 nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2289 opt_inst_info->array_index))
2290 goto nest_cancel;
2291
2292 switch (option->type) {
2293 case TEAM_OPTION_TYPE_U32:
2294 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2295 goto nest_cancel;
2296 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2297 goto nest_cancel;
2298 break;
2299 case TEAM_OPTION_TYPE_STRING:
2300 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2301 goto nest_cancel;
2302 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2303 ctx.data.str_val))
2304 goto nest_cancel;
2305 break;
2306 case TEAM_OPTION_TYPE_BINARY:
2307 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2308 goto nest_cancel;
2309 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2310 ctx.data.bin_val.ptr))
2311 goto nest_cancel;
2312 break;
2313 case TEAM_OPTION_TYPE_BOOL:
2314 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2315 goto nest_cancel;
2316 if (ctx.data.bool_val &&
2317 nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2318 goto nest_cancel;
2319 break;
2320 case TEAM_OPTION_TYPE_S32:
2321 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2322 goto nest_cancel;
2323 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2324 goto nest_cancel;
2325 break;
2326 default:
2327 BUG();
2328 }
2329 if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2330 goto nest_cancel;
2331 if (opt_inst->changed) {
2332 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2333 goto nest_cancel;
2334 opt_inst->changed = false;
2335 }
2336 nla_nest_end(skb, option_item);
2337 return 0;
2338
2339 nest_cancel:
2340 nla_nest_cancel(skb, option_item);
2341 return -EMSGSIZE;
2342 }
2343
2344 static int __send_and_alloc_skb(struct sk_buff **pskb,
2345 struct team *team, u32 portid,
2346 team_nl_send_func_t *send_func)
2347 {
2348 int err;
2349
2350 if (*pskb) {
2351 err = send_func(*pskb, team, portid);
2352 if (err)
2353 return err;
2354 }
2355 *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2356 if (!*pskb)
2357 return -ENOMEM;
2358 return 0;
2359 }
2360
2361 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2362 int flags, team_nl_send_func_t *send_func,
2363 struct list_head *sel_opt_inst_list)
2364 {
2365 struct nlattr *option_list;
2366 struct nlmsghdr *nlh;
2367 void *hdr;
2368 struct team_option_inst *opt_inst;
2369 int err;
2370 struct sk_buff *skb = NULL;
2371 bool incomplete;
2372 int i;
2373
2374 opt_inst = list_first_entry(sel_opt_inst_list,
2375 struct team_option_inst, tmp_list);
2376
2377 start_again:
2378 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2379 if (err)
2380 return err;
2381
2382 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2383 TEAM_CMD_OPTIONS_GET);
2384 if (!hdr)
2385 return -EMSGSIZE;
2386
2387 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2388 goto nla_put_failure;
2389 option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2390 if (!option_list)
2391 goto nla_put_failure;
2392
2393 i = 0;
2394 incomplete = false;
2395 list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2396 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2397 if (err) {
2398 if (err == -EMSGSIZE) {
2399 if (!i)
2400 goto errout;
2401 incomplete = true;
2402 break;
2403 }
2404 goto errout;
2405 }
2406 i++;
2407 }
2408
2409 nla_nest_end(skb, option_list);
2410 genlmsg_end(skb, hdr);
2411 if (incomplete)
2412 goto start_again;
2413
2414 send_done:
2415 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2416 if (!nlh) {
2417 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2418 if (err)
2419 goto errout;
2420 goto send_done;
2421 }
2422
2423 return send_func(skb, team, portid);
2424
2425 nla_put_failure:
2426 err = -EMSGSIZE;
2427 errout:
2428 genlmsg_cancel(skb, hdr);
2429 nlmsg_free(skb);
2430 return err;
2431 }
2432
2433 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2434 {
2435 struct team *team;
2436 struct team_option_inst *opt_inst;
2437 int err;
2438 LIST_HEAD(sel_opt_inst_list);
2439
2440 team = team_nl_team_get(info);
2441 if (!team)
2442 return -EINVAL;
2443
2444 list_for_each_entry(opt_inst, &team->option_inst_list, list)
2445 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2446 err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2447 NLM_F_ACK, team_nl_send_unicast,
2448 &sel_opt_inst_list);
2449
2450 team_nl_team_put(team);
2451
2452 return err;
2453 }
2454
2455 static int team_nl_send_event_options_get(struct team *team,
2456 struct list_head *sel_opt_inst_list);
2457
2458 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2459 {
2460 struct team *team;
2461 int err = 0;
2462 int i;
2463 struct nlattr *nl_option;
2464 LIST_HEAD(opt_inst_list);
2465
2466 rtnl_lock();
2467
2468 team = team_nl_team_get(info);
2469 if (!team) {
2470 err = -EINVAL;
2471 goto rtnl_unlock;
2472 }
2473
2474 err = -EINVAL;
2475 if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2476 err = -EINVAL;
2477 goto team_put;
2478 }
2479
2480 nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2481 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2482 struct nlattr *attr;
2483 struct nlattr *attr_data;
2484 enum team_option_type opt_type;
2485 int opt_port_ifindex = 0; /* != 0 for per-port options */
2486 u32 opt_array_index = 0;
2487 bool opt_is_array = false;
2488 struct team_option_inst *opt_inst;
2489 char *opt_name;
2490 bool opt_found = false;
2491
2492 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2493 err = -EINVAL;
2494 goto team_put;
2495 }
2496 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2497 nl_option, team_nl_option_policy);
2498 if (err)
2499 goto team_put;
2500 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2501 !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2502 err = -EINVAL;
2503 goto team_put;
2504 }
2505 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2506 case NLA_U32:
2507 opt_type = TEAM_OPTION_TYPE_U32;
2508 break;
2509 case NLA_STRING:
2510 opt_type = TEAM_OPTION_TYPE_STRING;
2511 break;
2512 case NLA_BINARY:
2513 opt_type = TEAM_OPTION_TYPE_BINARY;
2514 break;
2515 case NLA_FLAG:
2516 opt_type = TEAM_OPTION_TYPE_BOOL;
2517 break;
2518 case NLA_S32:
2519 opt_type = TEAM_OPTION_TYPE_S32;
2520 break;
2521 default:
2522 goto team_put;
2523 }
2524
2525 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2526 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2527 err = -EINVAL;
2528 goto team_put;
2529 }
2530
2531 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2532 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2533 if (attr)
2534 opt_port_ifindex = nla_get_u32(attr);
2535
2536 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2537 if (attr) {
2538 opt_is_array = true;
2539 opt_array_index = nla_get_u32(attr);
2540 }
2541
2542 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2543 struct team_option *option = opt_inst->option;
2544 struct team_gsetter_ctx ctx;
2545 struct team_option_inst_info *opt_inst_info;
2546 int tmp_ifindex;
2547
2548 opt_inst_info = &opt_inst->info;
2549 tmp_ifindex = opt_inst_info->port ?
2550 opt_inst_info->port->dev->ifindex : 0;
2551 if (option->type != opt_type ||
2552 strcmp(option->name, opt_name) ||
2553 tmp_ifindex != opt_port_ifindex ||
2554 (option->array_size && !opt_is_array) ||
2555 opt_inst_info->array_index != opt_array_index)
2556 continue;
2557 opt_found = true;
2558 ctx.info = opt_inst_info;
2559 switch (opt_type) {
2560 case TEAM_OPTION_TYPE_U32:
2561 ctx.data.u32_val = nla_get_u32(attr_data);
2562 break;
2563 case TEAM_OPTION_TYPE_STRING:
2564 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2565 err = -EINVAL;
2566 goto team_put;
2567 }
2568 ctx.data.str_val = nla_data(attr_data);
2569 break;
2570 case TEAM_OPTION_TYPE_BINARY:
2571 ctx.data.bin_val.len = nla_len(attr_data);
2572 ctx.data.bin_val.ptr = nla_data(attr_data);
2573 break;
2574 case TEAM_OPTION_TYPE_BOOL:
2575 ctx.data.bool_val = attr_data ? true : false;
2576 break;
2577 case TEAM_OPTION_TYPE_S32:
2578 ctx.data.s32_val = nla_get_s32(attr_data);
2579 break;
2580 default:
2581 BUG();
2582 }
2583 err = team_option_set(team, opt_inst, &ctx);
2584 if (err)
2585 goto team_put;
2586 opt_inst->changed = true;
2587 list_add(&opt_inst->tmp_list, &opt_inst_list);
2588 }
2589 if (!opt_found) {
2590 err = -ENOENT;
2591 goto team_put;
2592 }
2593 }
2594
2595 err = team_nl_send_event_options_get(team, &opt_inst_list);
2596
2597 team_put:
2598 team_nl_team_put(team);
2599 rtnl_unlock:
2600 rtnl_unlock();
2601 return err;
2602 }
2603
2604 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2605 struct team_port *port)
2606 {
2607 struct nlattr *port_item;
2608
2609 port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2610 if (!port_item)
2611 goto nest_cancel;
2612 if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2613 goto nest_cancel;
2614 if (port->changed) {
2615 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2616 goto nest_cancel;
2617 port->changed = false;
2618 }
2619 if ((port->removed &&
2620 nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2621 (port->state.linkup &&
2622 nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2623 nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2624 nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2625 goto nest_cancel;
2626 nla_nest_end(skb, port_item);
2627 return 0;
2628
2629 nest_cancel:
2630 nla_nest_cancel(skb, port_item);
2631 return -EMSGSIZE;
2632 }
2633
2634 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2635 int flags, team_nl_send_func_t *send_func,
2636 struct team_port *one_port)
2637 {
2638 struct nlattr *port_list;
2639 struct nlmsghdr *nlh;
2640 void *hdr;
2641 struct team_port *port;
2642 int err;
2643 struct sk_buff *skb = NULL;
2644 bool incomplete;
2645 int i;
2646
2647 port = list_first_entry_or_null(&team->port_list,
2648 struct team_port, list);
2649
2650 start_again:
2651 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2652 if (err)
2653 return err;
2654
2655 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2656 TEAM_CMD_PORT_LIST_GET);
2657 if (!hdr)
2658 return -EMSGSIZE;
2659
2660 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2661 goto nla_put_failure;
2662 port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2663 if (!port_list)
2664 goto nla_put_failure;
2665
2666 i = 0;
2667 incomplete = false;
2668
2669 /* If one port is selected, called wants to send port list containing
2670 * only this port. Otherwise go through all listed ports and send all
2671 */
2672 if (one_port) {
2673 err = team_nl_fill_one_port_get(skb, one_port);
2674 if (err)
2675 goto errout;
2676 } else if (port) {
2677 list_for_each_entry_from(port, &team->port_list, list) {
2678 err = team_nl_fill_one_port_get(skb, port);
2679 if (err) {
2680 if (err == -EMSGSIZE) {
2681 if (!i)
2682 goto errout;
2683 incomplete = true;
2684 break;
2685 }
2686 goto errout;
2687 }
2688 i++;
2689 }
2690 }
2691
2692 nla_nest_end(skb, port_list);
2693 genlmsg_end(skb, hdr);
2694 if (incomplete)
2695 goto start_again;
2696
2697 send_done:
2698 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2699 if (!nlh) {
2700 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2701 if (err)
2702 goto errout;
2703 goto send_done;
2704 }
2705
2706 return send_func(skb, team, portid);
2707
2708 nla_put_failure:
2709 err = -EMSGSIZE;
2710 errout:
2711 genlmsg_cancel(skb, hdr);
2712 nlmsg_free(skb);
2713 return err;
2714 }
2715
2716 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2717 struct genl_info *info)
2718 {
2719 struct team *team;
2720 int err;
2721
2722 team = team_nl_team_get(info);
2723 if (!team)
2724 return -EINVAL;
2725
2726 err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2727 NLM_F_ACK, team_nl_send_unicast, NULL);
2728
2729 team_nl_team_put(team);
2730
2731 return err;
2732 }
2733
2734 static const struct genl_ops team_nl_ops[] = {
2735 {
2736 .cmd = TEAM_CMD_NOOP,
2737 .doit = team_nl_cmd_noop,
2738 .policy = team_nl_policy,
2739 },
2740 {
2741 .cmd = TEAM_CMD_OPTIONS_SET,
2742 .doit = team_nl_cmd_options_set,
2743 .policy = team_nl_policy,
2744 .flags = GENL_ADMIN_PERM,
2745 },
2746 {
2747 .cmd = TEAM_CMD_OPTIONS_GET,
2748 .doit = team_nl_cmd_options_get,
2749 .policy = team_nl_policy,
2750 .flags = GENL_ADMIN_PERM,
2751 },
2752 {
2753 .cmd = TEAM_CMD_PORT_LIST_GET,
2754 .doit = team_nl_cmd_port_list_get,
2755 .policy = team_nl_policy,
2756 .flags = GENL_ADMIN_PERM,
2757 },
2758 };
2759
2760 static const struct genl_multicast_group team_nl_mcgrps[] = {
2761 { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2762 };
2763
2764 static int team_nl_send_multicast(struct sk_buff *skb,
2765 struct team *team, u32 portid)
2766 {
2767 return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2768 skb, 0, 0, GFP_KERNEL);
2769 }
2770
2771 static int team_nl_send_event_options_get(struct team *team,
2772 struct list_head *sel_opt_inst_list)
2773 {
2774 return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2775 sel_opt_inst_list);
2776 }
2777
2778 static int team_nl_send_event_port_get(struct team *team,
2779 struct team_port *port)
2780 {
2781 return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2782 port);
2783 }
2784
2785 static int team_nl_init(void)
2786 {
2787 return genl_register_family_with_ops_groups(&team_nl_family, team_nl_ops,
2788 team_nl_mcgrps);
2789 }
2790
2791 static void team_nl_fini(void)
2792 {
2793 genl_unregister_family(&team_nl_family);
2794 }
2795
2796
2797 /******************
2798 * Change checkers
2799 ******************/
2800
2801 static void __team_options_change_check(struct team *team)
2802 {
2803 int err;
2804 struct team_option_inst *opt_inst;
2805 LIST_HEAD(sel_opt_inst_list);
2806
2807 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2808 if (opt_inst->changed)
2809 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2810 }
2811 err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2812 if (err && err != -ESRCH)
2813 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2814 err);
2815 }
2816
2817 /* rtnl lock is held */
2818
2819 static void __team_port_change_send(struct team_port *port, bool linkup)
2820 {
2821 int err;
2822
2823 port->changed = true;
2824 port->state.linkup = linkup;
2825 team_refresh_port_linkup(port);
2826 if (linkup) {
2827 struct ethtool_link_ksettings ecmd;
2828
2829 err = __ethtool_get_link_ksettings(port->dev, &ecmd);
2830 if (!err) {
2831 port->state.speed = ecmd.base.speed;
2832 port->state.duplex = ecmd.base.duplex;
2833 goto send_event;
2834 }
2835 }
2836 port->state.speed = 0;
2837 port->state.duplex = 0;
2838
2839 send_event:
2840 err = team_nl_send_event_port_get(port->team, port);
2841 if (err && err != -ESRCH)
2842 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2843 port->dev->name, err);
2844
2845 }
2846
2847 static void __team_carrier_check(struct team *team)
2848 {
2849 struct team_port *port;
2850 bool team_linkup;
2851
2852 if (team->user_carrier_enabled)
2853 return;
2854
2855 team_linkup = false;
2856 list_for_each_entry(port, &team->port_list, list) {
2857 if (port->linkup) {
2858 team_linkup = true;
2859 break;
2860 }
2861 }
2862
2863 if (team_linkup)
2864 netif_carrier_on(team->dev);
2865 else
2866 netif_carrier_off(team->dev);
2867 }
2868
2869 static void __team_port_change_check(struct team_port *port, bool linkup)
2870 {
2871 if (port->state.linkup != linkup)
2872 __team_port_change_send(port, linkup);
2873 __team_carrier_check(port->team);
2874 }
2875
2876 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2877 {
2878 __team_port_change_send(port, linkup);
2879 __team_carrier_check(port->team);
2880 }
2881
2882 static void __team_port_change_port_removed(struct team_port *port)
2883 {
2884 port->removed = true;
2885 __team_port_change_send(port, false);
2886 __team_carrier_check(port->team);
2887 }
2888
2889 static void team_port_change_check(struct team_port *port, bool linkup)
2890 {
2891 struct team *team = port->team;
2892
2893 mutex_lock(&team->lock);
2894 __team_port_change_check(port, linkup);
2895 mutex_unlock(&team->lock);
2896 }
2897
2898
2899 /************************************
2900 * Net device notifier event handler
2901 ************************************/
2902
2903 static int team_device_event(struct notifier_block *unused,
2904 unsigned long event, void *ptr)
2905 {
2906 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2907 struct team_port *port;
2908
2909 port = team_port_get_rtnl(dev);
2910 if (!port)
2911 return NOTIFY_DONE;
2912
2913 switch (event) {
2914 case NETDEV_UP:
2915 if (netif_carrier_ok(dev))
2916 team_port_change_check(port, true);
2917 break;
2918 case NETDEV_DOWN:
2919 team_port_change_check(port, false);
2920 break;
2921 case NETDEV_CHANGE:
2922 if (netif_running(port->dev))
2923 team_port_change_check(port,
2924 !!netif_carrier_ok(port->dev));
2925 break;
2926 case NETDEV_UNREGISTER:
2927 team_del_slave(port->team->dev, dev);
2928 break;
2929 case NETDEV_FEAT_CHANGE:
2930 team_compute_features(port->team);
2931 break;
2932 case NETDEV_PRECHANGEMTU:
2933 /* Forbid to change mtu of underlaying device */
2934 if (!port->team->port_mtu_change_allowed)
2935 return NOTIFY_BAD;
2936 break;
2937 case NETDEV_PRE_TYPE_CHANGE:
2938 /* Forbid to change type of underlaying device */
2939 return NOTIFY_BAD;
2940 case NETDEV_RESEND_IGMP:
2941 /* Propagate to master device */
2942 call_netdevice_notifiers(event, port->team->dev);
2943 break;
2944 }
2945 return NOTIFY_DONE;
2946 }
2947
2948 static struct notifier_block team_notifier_block __read_mostly = {
2949 .notifier_call = team_device_event,
2950 };
2951
2952
2953 /***********************
2954 * Module init and exit
2955 ***********************/
2956
2957 static int __init team_module_init(void)
2958 {
2959 int err;
2960
2961 register_netdevice_notifier(&team_notifier_block);
2962
2963 err = rtnl_link_register(&team_link_ops);
2964 if (err)
2965 goto err_rtnl_reg;
2966
2967 err = team_nl_init();
2968 if (err)
2969 goto err_nl_init;
2970
2971 return 0;
2972
2973 err_nl_init:
2974 rtnl_link_unregister(&team_link_ops);
2975
2976 err_rtnl_reg:
2977 unregister_netdevice_notifier(&team_notifier_block);
2978
2979 return err;
2980 }
2981
2982 static void __exit team_module_exit(void)
2983 {
2984 team_nl_fini();
2985 rtnl_link_unregister(&team_link_ops);
2986 unregister_netdevice_notifier(&team_notifier_block);
2987 }
2988
2989 module_init(team_module_init);
2990 module_exit(team_module_exit);
2991
2992 MODULE_LICENSE("GPL v2");
2993 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
2994 MODULE_DESCRIPTION("Ethernet team device driver");
2995 MODULE_ALIAS_RTNL_LINK(DRV_NAME);
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