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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_storage addr;
64
65 memcpy(addr.__data, dev_addr, port_dev->addr_len);
66 addr.ss_family = port_dev->type;
67 return dev_set_mac_address(port_dev, (struct sockaddr *)&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 bool __team_option_inst_tmp_find(const struct list_head *opts,
265 const struct team_option_inst *needle)
266 {
267 struct team_option_inst *opt_inst;
268
269 list_for_each_entry(opt_inst, opts, tmp_list)
270 if (opt_inst == needle)
271 return true;
272 return false;
273 }
274
275 static int __team_options_register(struct team *team,
276 const struct team_option *option,
277 size_t option_count)
278 {
279 int i;
280 struct team_option **dst_opts;
281 int err;
282
283 dst_opts = kzalloc(sizeof(struct team_option *) * option_count,
284 GFP_KERNEL);
285 if (!dst_opts)
286 return -ENOMEM;
287 for (i = 0; i < option_count; i++, option++) {
288 if (__team_find_option(team, option->name)) {
289 err = -EEXIST;
290 goto alloc_rollback;
291 }
292 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
293 if (!dst_opts[i]) {
294 err = -ENOMEM;
295 goto alloc_rollback;
296 }
297 }
298
299 for (i = 0; i < option_count; i++) {
300 err = __team_option_inst_add_option(team, dst_opts[i]);
301 if (err)
302 goto inst_rollback;
303 list_add_tail(&dst_opts[i]->list, &team->option_list);
304 }
305
306 kfree(dst_opts);
307 return 0;
308
309 inst_rollback:
310 for (i--; i >= 0; i--)
311 __team_option_inst_del_option(team, dst_opts[i]);
312
313 i = option_count - 1;
314 alloc_rollback:
315 for (i--; i >= 0; i--)
316 kfree(dst_opts[i]);
317
318 kfree(dst_opts);
319 return err;
320 }
321
322 static void __team_options_mark_removed(struct team *team,
323 const struct team_option *option,
324 size_t option_count)
325 {
326 int i;
327
328 for (i = 0; i < option_count; i++, option++) {
329 struct team_option *del_opt;
330
331 del_opt = __team_find_option(team, option->name);
332 if (del_opt)
333 __team_option_inst_mark_removed_option(team, del_opt);
334 }
335 }
336
337 static void __team_options_unregister(struct team *team,
338 const struct team_option *option,
339 size_t option_count)
340 {
341 int i;
342
343 for (i = 0; i < option_count; i++, option++) {
344 struct team_option *del_opt;
345
346 del_opt = __team_find_option(team, option->name);
347 if (del_opt) {
348 __team_option_inst_del_option(team, del_opt);
349 list_del(&del_opt->list);
350 kfree(del_opt);
351 }
352 }
353 }
354
355 static void __team_options_change_check(struct team *team);
356
357 int team_options_register(struct team *team,
358 const struct team_option *option,
359 size_t option_count)
360 {
361 int err;
362
363 err = __team_options_register(team, option, option_count);
364 if (err)
365 return err;
366 __team_options_change_check(team);
367 return 0;
368 }
369 EXPORT_SYMBOL(team_options_register);
370
371 void team_options_unregister(struct team *team,
372 const struct team_option *option,
373 size_t option_count)
374 {
375 __team_options_mark_removed(team, option, option_count);
376 __team_options_change_check(team);
377 __team_options_unregister(team, option, option_count);
378 }
379 EXPORT_SYMBOL(team_options_unregister);
380
381 static int team_option_get(struct team *team,
382 struct team_option_inst *opt_inst,
383 struct team_gsetter_ctx *ctx)
384 {
385 if (!opt_inst->option->getter)
386 return -EOPNOTSUPP;
387 return opt_inst->option->getter(team, ctx);
388 }
389
390 static int team_option_set(struct team *team,
391 struct team_option_inst *opt_inst,
392 struct team_gsetter_ctx *ctx)
393 {
394 if (!opt_inst->option->setter)
395 return -EOPNOTSUPP;
396 return opt_inst->option->setter(team, ctx);
397 }
398
399 void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info)
400 {
401 struct team_option_inst *opt_inst;
402
403 opt_inst = container_of(opt_inst_info, struct team_option_inst, info);
404 opt_inst->changed = true;
405 }
406 EXPORT_SYMBOL(team_option_inst_set_change);
407
408 void team_options_change_check(struct team *team)
409 {
410 __team_options_change_check(team);
411 }
412 EXPORT_SYMBOL(team_options_change_check);
413
414
415 /****************
416 * Mode handling
417 ****************/
418
419 static LIST_HEAD(mode_list);
420 static DEFINE_SPINLOCK(mode_list_lock);
421
422 struct team_mode_item {
423 struct list_head list;
424 const struct team_mode *mode;
425 };
426
427 static struct team_mode_item *__find_mode(const char *kind)
428 {
429 struct team_mode_item *mitem;
430
431 list_for_each_entry(mitem, &mode_list, list) {
432 if (strcmp(mitem->mode->kind, kind) == 0)
433 return mitem;
434 }
435 return NULL;
436 }
437
438 static bool is_good_mode_name(const char *name)
439 {
440 while (*name != '\0') {
441 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
442 return false;
443 name++;
444 }
445 return true;
446 }
447
448 int team_mode_register(const struct team_mode *mode)
449 {
450 int err = 0;
451 struct team_mode_item *mitem;
452
453 if (!is_good_mode_name(mode->kind) ||
454 mode->priv_size > TEAM_MODE_PRIV_SIZE)
455 return -EINVAL;
456
457 mitem = kmalloc(sizeof(*mitem), GFP_KERNEL);
458 if (!mitem)
459 return -ENOMEM;
460
461 spin_lock(&mode_list_lock);
462 if (__find_mode(mode->kind)) {
463 err = -EEXIST;
464 kfree(mitem);
465 goto unlock;
466 }
467 mitem->mode = mode;
468 list_add_tail(&mitem->list, &mode_list);
469 unlock:
470 spin_unlock(&mode_list_lock);
471 return err;
472 }
473 EXPORT_SYMBOL(team_mode_register);
474
475 void team_mode_unregister(const struct team_mode *mode)
476 {
477 struct team_mode_item *mitem;
478
479 spin_lock(&mode_list_lock);
480 mitem = __find_mode(mode->kind);
481 if (mitem) {
482 list_del_init(&mitem->list);
483 kfree(mitem);
484 }
485 spin_unlock(&mode_list_lock);
486 }
487 EXPORT_SYMBOL(team_mode_unregister);
488
489 static const struct team_mode *team_mode_get(const char *kind)
490 {
491 struct team_mode_item *mitem;
492 const struct team_mode *mode = NULL;
493
494 spin_lock(&mode_list_lock);
495 mitem = __find_mode(kind);
496 if (!mitem) {
497 spin_unlock(&mode_list_lock);
498 request_module("team-mode-%s", kind);
499 spin_lock(&mode_list_lock);
500 mitem = __find_mode(kind);
501 }
502 if (mitem) {
503 mode = mitem->mode;
504 if (!try_module_get(mode->owner))
505 mode = NULL;
506 }
507
508 spin_unlock(&mode_list_lock);
509 return mode;
510 }
511
512 static void team_mode_put(const struct team_mode *mode)
513 {
514 module_put(mode->owner);
515 }
516
517 static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
518 {
519 dev_kfree_skb_any(skb);
520 return false;
521 }
522
523 static rx_handler_result_t team_dummy_receive(struct team *team,
524 struct team_port *port,
525 struct sk_buff *skb)
526 {
527 return RX_HANDLER_ANOTHER;
528 }
529
530 static const struct team_mode __team_no_mode = {
531 .kind = "*NOMODE*",
532 };
533
534 static bool team_is_mode_set(struct team *team)
535 {
536 return team->mode != &__team_no_mode;
537 }
538
539 static void team_set_no_mode(struct team *team)
540 {
541 team->user_carrier_enabled = false;
542 team->mode = &__team_no_mode;
543 }
544
545 static void team_adjust_ops(struct team *team)
546 {
547 /*
548 * To avoid checks in rx/tx skb paths, ensure here that non-null and
549 * correct ops are always set.
550 */
551
552 if (!team->en_port_count || !team_is_mode_set(team) ||
553 !team->mode->ops->transmit)
554 team->ops.transmit = team_dummy_transmit;
555 else
556 team->ops.transmit = team->mode->ops->transmit;
557
558 if (!team->en_port_count || !team_is_mode_set(team) ||
559 !team->mode->ops->receive)
560 team->ops.receive = team_dummy_receive;
561 else
562 team->ops.receive = team->mode->ops->receive;
563 }
564
565 /*
566 * We can benefit from the fact that it's ensured no port is present
567 * at the time of mode change. Therefore no packets are in fly so there's no
568 * need to set mode operations in any special way.
569 */
570 static int __team_change_mode(struct team *team,
571 const struct team_mode *new_mode)
572 {
573 /* Check if mode was previously set and do cleanup if so */
574 if (team_is_mode_set(team)) {
575 void (*exit_op)(struct team *team) = team->ops.exit;
576
577 /* Clear ops area so no callback is called any longer */
578 memset(&team->ops, 0, sizeof(struct team_mode_ops));
579 team_adjust_ops(team);
580
581 if (exit_op)
582 exit_op(team);
583 team_mode_put(team->mode);
584 team_set_no_mode(team);
585 /* zero private data area */
586 memset(&team->mode_priv, 0,
587 sizeof(struct team) - offsetof(struct team, mode_priv));
588 }
589
590 if (!new_mode)
591 return 0;
592
593 if (new_mode->ops->init) {
594 int err;
595
596 err = new_mode->ops->init(team);
597 if (err)
598 return err;
599 }
600
601 team->mode = new_mode;
602 memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
603 team_adjust_ops(team);
604
605 return 0;
606 }
607
608 static int team_change_mode(struct team *team, const char *kind)
609 {
610 const struct team_mode *new_mode;
611 struct net_device *dev = team->dev;
612 int err;
613
614 if (!list_empty(&team->port_list)) {
615 netdev_err(dev, "No ports can be present during mode change\n");
616 return -EBUSY;
617 }
618
619 if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) {
620 netdev_err(dev, "Unable to change to the same mode the team is in\n");
621 return -EINVAL;
622 }
623
624 new_mode = team_mode_get(kind);
625 if (!new_mode) {
626 netdev_err(dev, "Mode \"%s\" not found\n", kind);
627 return -EINVAL;
628 }
629
630 err = __team_change_mode(team, new_mode);
631 if (err) {
632 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
633 team_mode_put(new_mode);
634 return err;
635 }
636
637 netdev_info(dev, "Mode changed to \"%s\"\n", kind);
638 return 0;
639 }
640
641
642 /*********************
643 * Peers notification
644 *********************/
645
646 static void team_notify_peers_work(struct work_struct *work)
647 {
648 struct team *team;
649 int val;
650
651 team = container_of(work, struct team, notify_peers.dw.work);
652
653 if (!rtnl_trylock()) {
654 schedule_delayed_work(&team->notify_peers.dw, 0);
655 return;
656 }
657 val = atomic_dec_if_positive(&team->notify_peers.count_pending);
658 if (val < 0) {
659 rtnl_unlock();
660 return;
661 }
662 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, team->dev);
663 rtnl_unlock();
664 if (val)
665 schedule_delayed_work(&team->notify_peers.dw,
666 msecs_to_jiffies(team->notify_peers.interval));
667 }
668
669 static void team_notify_peers(struct team *team)
670 {
671 if (!team->notify_peers.count || !netif_running(team->dev))
672 return;
673 atomic_add(team->notify_peers.count, &team->notify_peers.count_pending);
674 schedule_delayed_work(&team->notify_peers.dw, 0);
675 }
676
677 static void team_notify_peers_init(struct team *team)
678 {
679 INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work);
680 }
681
682 static void team_notify_peers_fini(struct team *team)
683 {
684 cancel_delayed_work_sync(&team->notify_peers.dw);
685 }
686
687
688 /*******************************
689 * Send multicast group rejoins
690 *******************************/
691
692 static void team_mcast_rejoin_work(struct work_struct *work)
693 {
694 struct team *team;
695 int val;
696
697 team = container_of(work, struct team, mcast_rejoin.dw.work);
698
699 if (!rtnl_trylock()) {
700 schedule_delayed_work(&team->mcast_rejoin.dw, 0);
701 return;
702 }
703 val = atomic_dec_if_positive(&team->mcast_rejoin.count_pending);
704 if (val < 0) {
705 rtnl_unlock();
706 return;
707 }
708 call_netdevice_notifiers(NETDEV_RESEND_IGMP, team->dev);
709 rtnl_unlock();
710 if (val)
711 schedule_delayed_work(&team->mcast_rejoin.dw,
712 msecs_to_jiffies(team->mcast_rejoin.interval));
713 }
714
715 static void team_mcast_rejoin(struct team *team)
716 {
717 if (!team->mcast_rejoin.count || !netif_running(team->dev))
718 return;
719 atomic_add(team->mcast_rejoin.count, &team->mcast_rejoin.count_pending);
720 schedule_delayed_work(&team->mcast_rejoin.dw, 0);
721 }
722
723 static void team_mcast_rejoin_init(struct team *team)
724 {
725 INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work);
726 }
727
728 static void team_mcast_rejoin_fini(struct team *team)
729 {
730 cancel_delayed_work_sync(&team->mcast_rejoin.dw);
731 }
732
733
734 /************************
735 * Rx path frame handler
736 ************************/
737
738 /* note: already called with rcu_read_lock */
739 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
740 {
741 struct sk_buff *skb = *pskb;
742 struct team_port *port;
743 struct team *team;
744 rx_handler_result_t res;
745
746 skb = skb_share_check(skb, GFP_ATOMIC);
747 if (!skb)
748 return RX_HANDLER_CONSUMED;
749
750 *pskb = skb;
751
752 port = team_port_get_rcu(skb->dev);
753 team = port->team;
754 if (!team_port_enabled(port)) {
755 /* allow exact match delivery for disabled ports */
756 res = RX_HANDLER_EXACT;
757 } else {
758 res = team->ops.receive(team, port, skb);
759 }
760 if (res == RX_HANDLER_ANOTHER) {
761 struct team_pcpu_stats *pcpu_stats;
762
763 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
764 u64_stats_update_begin(&pcpu_stats->syncp);
765 pcpu_stats->rx_packets++;
766 pcpu_stats->rx_bytes += skb->len;
767 if (skb->pkt_type == PACKET_MULTICAST)
768 pcpu_stats->rx_multicast++;
769 u64_stats_update_end(&pcpu_stats->syncp);
770
771 skb->dev = team->dev;
772 } else if (res == RX_HANDLER_EXACT) {
773 this_cpu_inc(team->pcpu_stats->rx_nohandler);
774 } else {
775 this_cpu_inc(team->pcpu_stats->rx_dropped);
776 }
777
778 return res;
779 }
780
781
782 /*************************************
783 * Multiqueue Tx port select override
784 *************************************/
785
786 static int team_queue_override_init(struct team *team)
787 {
788 struct list_head *listarr;
789 unsigned int queue_cnt = team->dev->num_tx_queues - 1;
790 unsigned int i;
791
792 if (!queue_cnt)
793 return 0;
794 listarr = kmalloc(sizeof(struct list_head) * queue_cnt, GFP_KERNEL);
795 if (!listarr)
796 return -ENOMEM;
797 team->qom_lists = listarr;
798 for (i = 0; i < queue_cnt; i++)
799 INIT_LIST_HEAD(listarr++);
800 return 0;
801 }
802
803 static void team_queue_override_fini(struct team *team)
804 {
805 kfree(team->qom_lists);
806 }
807
808 static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
809 {
810 return &team->qom_lists[queue_id - 1];
811 }
812
813 /*
814 * note: already called with rcu_read_lock
815 */
816 static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
817 {
818 struct list_head *qom_list;
819 struct team_port *port;
820
821 if (!team->queue_override_enabled || !skb->queue_mapping)
822 return false;
823 qom_list = __team_get_qom_list(team, skb->queue_mapping);
824 list_for_each_entry_rcu(port, qom_list, qom_list) {
825 if (!team_dev_queue_xmit(team, port, skb))
826 return true;
827 }
828 return false;
829 }
830
831 static void __team_queue_override_port_del(struct team *team,
832 struct team_port *port)
833 {
834 if (!port->queue_id)
835 return;
836 list_del_rcu(&port->qom_list);
837 }
838
839 static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
840 struct team_port *cur)
841 {
842 if (port->priority < cur->priority)
843 return true;
844 if (port->priority > cur->priority)
845 return false;
846 if (port->index < cur->index)
847 return true;
848 return false;
849 }
850
851 static void __team_queue_override_port_add(struct team *team,
852 struct team_port *port)
853 {
854 struct team_port *cur;
855 struct list_head *qom_list;
856 struct list_head *node;
857
858 if (!port->queue_id)
859 return;
860 qom_list = __team_get_qom_list(team, port->queue_id);
861 node = qom_list;
862 list_for_each_entry(cur, qom_list, qom_list) {
863 if (team_queue_override_port_has_gt_prio_than(port, cur))
864 break;
865 node = &cur->qom_list;
866 }
867 list_add_tail_rcu(&port->qom_list, node);
868 }
869
870 static void __team_queue_override_enabled_check(struct team *team)
871 {
872 struct team_port *port;
873 bool enabled = false;
874
875 list_for_each_entry(port, &team->port_list, list) {
876 if (port->queue_id) {
877 enabled = true;
878 break;
879 }
880 }
881 if (enabled == team->queue_override_enabled)
882 return;
883 netdev_dbg(team->dev, "%s queue override\n",
884 enabled ? "Enabling" : "Disabling");
885 team->queue_override_enabled = enabled;
886 }
887
888 static void team_queue_override_port_prio_changed(struct team *team,
889 struct team_port *port)
890 {
891 if (!port->queue_id || team_port_enabled(port))
892 return;
893 __team_queue_override_port_del(team, port);
894 __team_queue_override_port_add(team, port);
895 __team_queue_override_enabled_check(team);
896 }
897
898 static void team_queue_override_port_change_queue_id(struct team *team,
899 struct team_port *port,
900 u16 new_queue_id)
901 {
902 if (team_port_enabled(port)) {
903 __team_queue_override_port_del(team, port);
904 port->queue_id = new_queue_id;
905 __team_queue_override_port_add(team, port);
906 __team_queue_override_enabled_check(team);
907 } else {
908 port->queue_id = new_queue_id;
909 }
910 }
911
912 static void team_queue_override_port_add(struct team *team,
913 struct team_port *port)
914 {
915 __team_queue_override_port_add(team, port);
916 __team_queue_override_enabled_check(team);
917 }
918
919 static void team_queue_override_port_del(struct team *team,
920 struct team_port *port)
921 {
922 __team_queue_override_port_del(team, port);
923 __team_queue_override_enabled_check(team);
924 }
925
926
927 /****************
928 * Port handling
929 ****************/
930
931 static bool team_port_find(const struct team *team,
932 const struct team_port *port)
933 {
934 struct team_port *cur;
935
936 list_for_each_entry(cur, &team->port_list, list)
937 if (cur == port)
938 return true;
939 return false;
940 }
941
942 /*
943 * Enable/disable port by adding to enabled port hashlist and setting
944 * port->index (Might be racy so reader could see incorrect ifindex when
945 * processing a flying packet, but that is not a problem). Write guarded
946 * by team->lock.
947 */
948 static void team_port_enable(struct team *team,
949 struct team_port *port)
950 {
951 if (team_port_enabled(port))
952 return;
953 port->index = team->en_port_count++;
954 hlist_add_head_rcu(&port->hlist,
955 team_port_index_hash(team, port->index));
956 team_adjust_ops(team);
957 team_queue_override_port_add(team, port);
958 if (team->ops.port_enabled)
959 team->ops.port_enabled(team, port);
960 team_notify_peers(team);
961 team_mcast_rejoin(team);
962 team_lower_state_changed(port);
963 }
964
965 static void __reconstruct_port_hlist(struct team *team, int rm_index)
966 {
967 int i;
968 struct team_port *port;
969
970 for (i = rm_index + 1; i < team->en_port_count; i++) {
971 port = team_get_port_by_index(team, i);
972 hlist_del_rcu(&port->hlist);
973 port->index--;
974 hlist_add_head_rcu(&port->hlist,
975 team_port_index_hash(team, port->index));
976 }
977 }
978
979 static void team_port_disable(struct team *team,
980 struct team_port *port)
981 {
982 if (!team_port_enabled(port))
983 return;
984 if (team->ops.port_disabled)
985 team->ops.port_disabled(team, port);
986 hlist_del_rcu(&port->hlist);
987 __reconstruct_port_hlist(team, port->index);
988 port->index = -1;
989 team->en_port_count--;
990 team_queue_override_port_del(team, port);
991 team_adjust_ops(team);
992 team_notify_peers(team);
993 team_mcast_rejoin(team);
994 team_lower_state_changed(port);
995 }
996
997 #define TEAM_VLAN_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
998 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
999 NETIF_F_HIGHDMA | NETIF_F_LRO)
1000
1001 #define TEAM_ENC_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
1002 NETIF_F_RXCSUM | NETIF_F_ALL_TSO)
1003
1004 static void __team_compute_features(struct team *team)
1005 {
1006 struct team_port *port;
1007 netdev_features_t vlan_features = TEAM_VLAN_FEATURES &
1008 NETIF_F_ALL_FOR_ALL;
1009 netdev_features_t enc_features = TEAM_ENC_FEATURES;
1010 unsigned short max_hard_header_len = ETH_HLEN;
1011 unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE |
1012 IFF_XMIT_DST_RELEASE_PERM;
1013
1014 list_for_each_entry(port, &team->port_list, list) {
1015 vlan_features = netdev_increment_features(vlan_features,
1016 port->dev->vlan_features,
1017 TEAM_VLAN_FEATURES);
1018 enc_features =
1019 netdev_increment_features(enc_features,
1020 port->dev->hw_enc_features,
1021 TEAM_ENC_FEATURES);
1022
1023
1024 dst_release_flag &= port->dev->priv_flags;
1025 if (port->dev->hard_header_len > max_hard_header_len)
1026 max_hard_header_len = port->dev->hard_header_len;
1027 }
1028
1029 team->dev->vlan_features = vlan_features;
1030 team->dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL;
1031 team->dev->hard_header_len = max_hard_header_len;
1032
1033 team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
1034 if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
1035 team->dev->priv_flags |= IFF_XMIT_DST_RELEASE;
1036 }
1037
1038 static void team_compute_features(struct team *team)
1039 {
1040 mutex_lock(&team->lock);
1041 __team_compute_features(team);
1042 mutex_unlock(&team->lock);
1043 netdev_change_features(team->dev);
1044 }
1045
1046 static int team_port_enter(struct team *team, struct team_port *port)
1047 {
1048 int err = 0;
1049
1050 dev_hold(team->dev);
1051 if (team->ops.port_enter) {
1052 err = team->ops.port_enter(team, port);
1053 if (err) {
1054 netdev_err(team->dev, "Device %s failed to enter team mode\n",
1055 port->dev->name);
1056 goto err_port_enter;
1057 }
1058 }
1059
1060 return 0;
1061
1062 err_port_enter:
1063 dev_put(team->dev);
1064
1065 return err;
1066 }
1067
1068 static void team_port_leave(struct team *team, struct team_port *port)
1069 {
1070 if (team->ops.port_leave)
1071 team->ops.port_leave(team, port);
1072 dev_put(team->dev);
1073 }
1074
1075 #ifdef CONFIG_NET_POLL_CONTROLLER
1076 static int __team_port_enable_netpoll(struct team_port *port)
1077 {
1078 struct netpoll *np;
1079 int err;
1080
1081 np = kzalloc(sizeof(*np), GFP_KERNEL);
1082 if (!np)
1083 return -ENOMEM;
1084
1085 err = __netpoll_setup(np, port->dev);
1086 if (err) {
1087 kfree(np);
1088 return err;
1089 }
1090 port->np = np;
1091 return err;
1092 }
1093
1094 static int team_port_enable_netpoll(struct team_port *port)
1095 {
1096 if (!port->team->dev->npinfo)
1097 return 0;
1098
1099 return __team_port_enable_netpoll(port);
1100 }
1101
1102 static void team_port_disable_netpoll(struct team_port *port)
1103 {
1104 struct netpoll *np = port->np;
1105
1106 if (!np)
1107 return;
1108 port->np = NULL;
1109
1110 /* Wait for transmitting packets to finish before freeing. */
1111 synchronize_rcu_bh();
1112 __netpoll_cleanup(np);
1113 kfree(np);
1114 }
1115 #else
1116 static int team_port_enable_netpoll(struct team_port *port)
1117 {
1118 return 0;
1119 }
1120 static void team_port_disable_netpoll(struct team_port *port)
1121 {
1122 }
1123 #endif
1124
1125 static int team_upper_dev_link(struct team *team, struct team_port *port)
1126 {
1127 struct netdev_lag_upper_info lag_upper_info;
1128 int err;
1129
1130 lag_upper_info.tx_type = team->mode->lag_tx_type;
1131 err = netdev_master_upper_dev_link(port->dev, team->dev, NULL,
1132 &lag_upper_info, NULL);
1133 if (err)
1134 return err;
1135 port->dev->priv_flags |= IFF_TEAM_PORT;
1136 return 0;
1137 }
1138
1139 static void team_upper_dev_unlink(struct team *team, struct team_port *port)
1140 {
1141 netdev_upper_dev_unlink(port->dev, team->dev);
1142 port->dev->priv_flags &= ~IFF_TEAM_PORT;
1143 }
1144
1145 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1146 static int team_dev_type_check_change(struct net_device *dev,
1147 struct net_device *port_dev);
1148
1149 static int team_port_add(struct team *team, struct net_device *port_dev)
1150 {
1151 struct net_device *dev = team->dev;
1152 struct team_port *port;
1153 char *portname = port_dev->name;
1154 int err;
1155
1156 if (port_dev->flags & IFF_LOOPBACK) {
1157 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1158 portname);
1159 return -EINVAL;
1160 }
1161
1162 if (team_port_exists(port_dev)) {
1163 netdev_err(dev, "Device %s is already a port "
1164 "of a team device\n", portname);
1165 return -EBUSY;
1166 }
1167
1168 if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1169 vlan_uses_dev(dev)) {
1170 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1171 portname);
1172 return -EPERM;
1173 }
1174
1175 err = team_dev_type_check_change(dev, port_dev);
1176 if (err)
1177 return err;
1178
1179 if (port_dev->flags & IFF_UP) {
1180 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1181 portname);
1182 return -EBUSY;
1183 }
1184
1185 port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1186 GFP_KERNEL);
1187 if (!port)
1188 return -ENOMEM;
1189
1190 port->dev = port_dev;
1191 port->team = team;
1192 INIT_LIST_HEAD(&port->qom_list);
1193
1194 port->orig.mtu = port_dev->mtu;
1195 err = dev_set_mtu(port_dev, dev->mtu);
1196 if (err) {
1197 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1198 goto err_set_mtu;
1199 }
1200
1201 memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1202
1203 err = team_port_enter(team, port);
1204 if (err) {
1205 netdev_err(dev, "Device %s failed to enter team mode\n",
1206 portname);
1207 goto err_port_enter;
1208 }
1209
1210 err = dev_open(port_dev);
1211 if (err) {
1212 netdev_dbg(dev, "Device %s opening failed\n",
1213 portname);
1214 goto err_dev_open;
1215 }
1216
1217 err = vlan_vids_add_by_dev(port_dev, dev);
1218 if (err) {
1219 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1220 portname);
1221 goto err_vids_add;
1222 }
1223
1224 err = team_port_enable_netpoll(port);
1225 if (err) {
1226 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1227 portname);
1228 goto err_enable_netpoll;
1229 }
1230
1231 if (!(dev->features & NETIF_F_LRO))
1232 dev_disable_lro(port_dev);
1233
1234 err = netdev_rx_handler_register(port_dev, team_handle_frame,
1235 port);
1236 if (err) {
1237 netdev_err(dev, "Device %s failed to register rx_handler\n",
1238 portname);
1239 goto err_handler_register;
1240 }
1241
1242 err = team_upper_dev_link(team, port);
1243 if (err) {
1244 netdev_err(dev, "Device %s failed to set upper link\n",
1245 portname);
1246 goto err_set_upper_link;
1247 }
1248
1249 err = __team_option_inst_add_port(team, port);
1250 if (err) {
1251 netdev_err(dev, "Device %s failed to add per-port options\n",
1252 portname);
1253 goto err_option_port_add;
1254 }
1255
1256 netif_addr_lock_bh(dev);
1257 dev_uc_sync_multiple(port_dev, dev);
1258 dev_mc_sync_multiple(port_dev, dev);
1259 netif_addr_unlock_bh(dev);
1260
1261 port->index = -1;
1262 list_add_tail_rcu(&port->list, &team->port_list);
1263 team_port_enable(team, port);
1264 __team_compute_features(team);
1265 __team_port_change_port_added(port, !!netif_carrier_ok(port_dev));
1266 __team_options_change_check(team);
1267
1268 netdev_info(dev, "Port device %s added\n", portname);
1269
1270 return 0;
1271
1272 err_option_port_add:
1273 team_upper_dev_unlink(team, port);
1274
1275 err_set_upper_link:
1276 netdev_rx_handler_unregister(port_dev);
1277
1278 err_handler_register:
1279 team_port_disable_netpoll(port);
1280
1281 err_enable_netpoll:
1282 vlan_vids_del_by_dev(port_dev, dev);
1283
1284 err_vids_add:
1285 dev_close(port_dev);
1286
1287 err_dev_open:
1288 team_port_leave(team, port);
1289 team_port_set_orig_dev_addr(port);
1290
1291 err_port_enter:
1292 dev_set_mtu(port_dev, port->orig.mtu);
1293
1294 err_set_mtu:
1295 kfree(port);
1296
1297 return err;
1298 }
1299
1300 static void __team_port_change_port_removed(struct team_port *port);
1301
1302 static int team_port_del(struct team *team, struct net_device *port_dev)
1303 {
1304 struct net_device *dev = team->dev;
1305 struct team_port *port;
1306 char *portname = port_dev->name;
1307
1308 port = team_port_get_rtnl(port_dev);
1309 if (!port || !team_port_find(team, port)) {
1310 netdev_err(dev, "Device %s does not act as a port of this team\n",
1311 portname);
1312 return -ENOENT;
1313 }
1314
1315 team_port_disable(team, port);
1316 list_del_rcu(&port->list);
1317 team_upper_dev_unlink(team, port);
1318 netdev_rx_handler_unregister(port_dev);
1319 team_port_disable_netpoll(port);
1320 vlan_vids_del_by_dev(port_dev, dev);
1321 dev_uc_unsync(port_dev, dev);
1322 dev_mc_unsync(port_dev, dev);
1323 dev_close(port_dev);
1324 team_port_leave(team, port);
1325
1326 __team_option_inst_mark_removed_port(team, port);
1327 __team_options_change_check(team);
1328 __team_option_inst_del_port(team, port);
1329 __team_port_change_port_removed(port);
1330
1331 team_port_set_orig_dev_addr(port);
1332 dev_set_mtu(port_dev, port->orig.mtu);
1333 kfree_rcu(port, rcu);
1334 netdev_info(dev, "Port device %s removed\n", portname);
1335 __team_compute_features(team);
1336
1337 return 0;
1338 }
1339
1340
1341 /*****************
1342 * Net device ops
1343 *****************/
1344
1345 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1346 {
1347 ctx->data.str_val = team->mode->kind;
1348 return 0;
1349 }
1350
1351 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1352 {
1353 return team_change_mode(team, ctx->data.str_val);
1354 }
1355
1356 static int team_notify_peers_count_get(struct team *team,
1357 struct team_gsetter_ctx *ctx)
1358 {
1359 ctx->data.u32_val = team->notify_peers.count;
1360 return 0;
1361 }
1362
1363 static int team_notify_peers_count_set(struct team *team,
1364 struct team_gsetter_ctx *ctx)
1365 {
1366 team->notify_peers.count = ctx->data.u32_val;
1367 return 0;
1368 }
1369
1370 static int team_notify_peers_interval_get(struct team *team,
1371 struct team_gsetter_ctx *ctx)
1372 {
1373 ctx->data.u32_val = team->notify_peers.interval;
1374 return 0;
1375 }
1376
1377 static int team_notify_peers_interval_set(struct team *team,
1378 struct team_gsetter_ctx *ctx)
1379 {
1380 team->notify_peers.interval = ctx->data.u32_val;
1381 return 0;
1382 }
1383
1384 static int team_mcast_rejoin_count_get(struct team *team,
1385 struct team_gsetter_ctx *ctx)
1386 {
1387 ctx->data.u32_val = team->mcast_rejoin.count;
1388 return 0;
1389 }
1390
1391 static int team_mcast_rejoin_count_set(struct team *team,
1392 struct team_gsetter_ctx *ctx)
1393 {
1394 team->mcast_rejoin.count = ctx->data.u32_val;
1395 return 0;
1396 }
1397
1398 static int team_mcast_rejoin_interval_get(struct team *team,
1399 struct team_gsetter_ctx *ctx)
1400 {
1401 ctx->data.u32_val = team->mcast_rejoin.interval;
1402 return 0;
1403 }
1404
1405 static int team_mcast_rejoin_interval_set(struct team *team,
1406 struct team_gsetter_ctx *ctx)
1407 {
1408 team->mcast_rejoin.interval = ctx->data.u32_val;
1409 return 0;
1410 }
1411
1412 static int team_port_en_option_get(struct team *team,
1413 struct team_gsetter_ctx *ctx)
1414 {
1415 struct team_port *port = ctx->info->port;
1416
1417 ctx->data.bool_val = team_port_enabled(port);
1418 return 0;
1419 }
1420
1421 static int team_port_en_option_set(struct team *team,
1422 struct team_gsetter_ctx *ctx)
1423 {
1424 struct team_port *port = ctx->info->port;
1425
1426 if (ctx->data.bool_val)
1427 team_port_enable(team, port);
1428 else
1429 team_port_disable(team, port);
1430 return 0;
1431 }
1432
1433 static int team_user_linkup_option_get(struct team *team,
1434 struct team_gsetter_ctx *ctx)
1435 {
1436 struct team_port *port = ctx->info->port;
1437
1438 ctx->data.bool_val = port->user.linkup;
1439 return 0;
1440 }
1441
1442 static void __team_carrier_check(struct team *team);
1443
1444 static int team_user_linkup_option_set(struct team *team,
1445 struct team_gsetter_ctx *ctx)
1446 {
1447 struct team_port *port = ctx->info->port;
1448
1449 port->user.linkup = ctx->data.bool_val;
1450 team_refresh_port_linkup(port);
1451 __team_carrier_check(port->team);
1452 return 0;
1453 }
1454
1455 static int team_user_linkup_en_option_get(struct team *team,
1456 struct team_gsetter_ctx *ctx)
1457 {
1458 struct team_port *port = ctx->info->port;
1459
1460 ctx->data.bool_val = port->user.linkup_enabled;
1461 return 0;
1462 }
1463
1464 static int team_user_linkup_en_option_set(struct team *team,
1465 struct team_gsetter_ctx *ctx)
1466 {
1467 struct team_port *port = ctx->info->port;
1468
1469 port->user.linkup_enabled = ctx->data.bool_val;
1470 team_refresh_port_linkup(port);
1471 __team_carrier_check(port->team);
1472 return 0;
1473 }
1474
1475 static int team_priority_option_get(struct team *team,
1476 struct team_gsetter_ctx *ctx)
1477 {
1478 struct team_port *port = ctx->info->port;
1479
1480 ctx->data.s32_val = port->priority;
1481 return 0;
1482 }
1483
1484 static int team_priority_option_set(struct team *team,
1485 struct team_gsetter_ctx *ctx)
1486 {
1487 struct team_port *port = ctx->info->port;
1488 s32 priority = ctx->data.s32_val;
1489
1490 if (port->priority == priority)
1491 return 0;
1492 port->priority = priority;
1493 team_queue_override_port_prio_changed(team, port);
1494 return 0;
1495 }
1496
1497 static int team_queue_id_option_get(struct team *team,
1498 struct team_gsetter_ctx *ctx)
1499 {
1500 struct team_port *port = ctx->info->port;
1501
1502 ctx->data.u32_val = port->queue_id;
1503 return 0;
1504 }
1505
1506 static int team_queue_id_option_set(struct team *team,
1507 struct team_gsetter_ctx *ctx)
1508 {
1509 struct team_port *port = ctx->info->port;
1510 u16 new_queue_id = ctx->data.u32_val;
1511
1512 if (port->queue_id == new_queue_id)
1513 return 0;
1514 if (new_queue_id >= team->dev->real_num_tx_queues)
1515 return -EINVAL;
1516 team_queue_override_port_change_queue_id(team, port, new_queue_id);
1517 return 0;
1518 }
1519
1520 static const struct team_option team_options[] = {
1521 {
1522 .name = "mode",
1523 .type = TEAM_OPTION_TYPE_STRING,
1524 .getter = team_mode_option_get,
1525 .setter = team_mode_option_set,
1526 },
1527 {
1528 .name = "notify_peers_count",
1529 .type = TEAM_OPTION_TYPE_U32,
1530 .getter = team_notify_peers_count_get,
1531 .setter = team_notify_peers_count_set,
1532 },
1533 {
1534 .name = "notify_peers_interval",
1535 .type = TEAM_OPTION_TYPE_U32,
1536 .getter = team_notify_peers_interval_get,
1537 .setter = team_notify_peers_interval_set,
1538 },
1539 {
1540 .name = "mcast_rejoin_count",
1541 .type = TEAM_OPTION_TYPE_U32,
1542 .getter = team_mcast_rejoin_count_get,
1543 .setter = team_mcast_rejoin_count_set,
1544 },
1545 {
1546 .name = "mcast_rejoin_interval",
1547 .type = TEAM_OPTION_TYPE_U32,
1548 .getter = team_mcast_rejoin_interval_get,
1549 .setter = team_mcast_rejoin_interval_set,
1550 },
1551 {
1552 .name = "enabled",
1553 .type = TEAM_OPTION_TYPE_BOOL,
1554 .per_port = true,
1555 .getter = team_port_en_option_get,
1556 .setter = team_port_en_option_set,
1557 },
1558 {
1559 .name = "user_linkup",
1560 .type = TEAM_OPTION_TYPE_BOOL,
1561 .per_port = true,
1562 .getter = team_user_linkup_option_get,
1563 .setter = team_user_linkup_option_set,
1564 },
1565 {
1566 .name = "user_linkup_enabled",
1567 .type = TEAM_OPTION_TYPE_BOOL,
1568 .per_port = true,
1569 .getter = team_user_linkup_en_option_get,
1570 .setter = team_user_linkup_en_option_set,
1571 },
1572 {
1573 .name = "priority",
1574 .type = TEAM_OPTION_TYPE_S32,
1575 .per_port = true,
1576 .getter = team_priority_option_get,
1577 .setter = team_priority_option_set,
1578 },
1579 {
1580 .name = "queue_id",
1581 .type = TEAM_OPTION_TYPE_U32,
1582 .per_port = true,
1583 .getter = team_queue_id_option_get,
1584 .setter = team_queue_id_option_set,
1585 },
1586 };
1587
1588
1589 static int team_init(struct net_device *dev)
1590 {
1591 struct team *team = netdev_priv(dev);
1592 int i;
1593 int err;
1594
1595 team->dev = dev;
1596 mutex_init(&team->lock);
1597 team_set_no_mode(team);
1598
1599 team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1600 if (!team->pcpu_stats)
1601 return -ENOMEM;
1602
1603 for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1604 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1605 INIT_LIST_HEAD(&team->port_list);
1606 err = team_queue_override_init(team);
1607 if (err)
1608 goto err_team_queue_override_init;
1609
1610 team_adjust_ops(team);
1611
1612 INIT_LIST_HEAD(&team->option_list);
1613 INIT_LIST_HEAD(&team->option_inst_list);
1614
1615 team_notify_peers_init(team);
1616 team_mcast_rejoin_init(team);
1617
1618 err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1619 if (err)
1620 goto err_options_register;
1621 netif_carrier_off(dev);
1622
1623 netdev_lockdep_set_classes(dev);
1624
1625 return 0;
1626
1627 err_options_register:
1628 team_mcast_rejoin_fini(team);
1629 team_notify_peers_fini(team);
1630 team_queue_override_fini(team);
1631 err_team_queue_override_init:
1632 free_percpu(team->pcpu_stats);
1633
1634 return err;
1635 }
1636
1637 static void team_uninit(struct net_device *dev)
1638 {
1639 struct team *team = netdev_priv(dev);
1640 struct team_port *port;
1641 struct team_port *tmp;
1642
1643 mutex_lock(&team->lock);
1644 list_for_each_entry_safe(port, tmp, &team->port_list, list)
1645 team_port_del(team, port->dev);
1646
1647 __team_change_mode(team, NULL); /* cleanup */
1648 __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1649 team_mcast_rejoin_fini(team);
1650 team_notify_peers_fini(team);
1651 team_queue_override_fini(team);
1652 mutex_unlock(&team->lock);
1653 netdev_change_features(dev);
1654 }
1655
1656 static void team_destructor(struct net_device *dev)
1657 {
1658 struct team *team = netdev_priv(dev);
1659
1660 free_percpu(team->pcpu_stats);
1661 }
1662
1663 static int team_open(struct net_device *dev)
1664 {
1665 return 0;
1666 }
1667
1668 static int team_close(struct net_device *dev)
1669 {
1670 return 0;
1671 }
1672
1673 /*
1674 * note: already called with rcu_read_lock
1675 */
1676 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1677 {
1678 struct team *team = netdev_priv(dev);
1679 bool tx_success;
1680 unsigned int len = skb->len;
1681
1682 tx_success = team_queue_override_transmit(team, skb);
1683 if (!tx_success)
1684 tx_success = team->ops.transmit(team, skb);
1685 if (tx_success) {
1686 struct team_pcpu_stats *pcpu_stats;
1687
1688 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1689 u64_stats_update_begin(&pcpu_stats->syncp);
1690 pcpu_stats->tx_packets++;
1691 pcpu_stats->tx_bytes += len;
1692 u64_stats_update_end(&pcpu_stats->syncp);
1693 } else {
1694 this_cpu_inc(team->pcpu_stats->tx_dropped);
1695 }
1696
1697 return NETDEV_TX_OK;
1698 }
1699
1700 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1701 void *accel_priv, select_queue_fallback_t fallback)
1702 {
1703 /*
1704 * This helper function exists to help dev_pick_tx get the correct
1705 * destination queue. Using a helper function skips a call to
1706 * skb_tx_hash and will put the skbs in the queue we expect on their
1707 * way down to the team driver.
1708 */
1709 u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1710
1711 /*
1712 * Save the original txq to restore before passing to the driver
1713 */
1714 qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1715
1716 if (unlikely(txq >= dev->real_num_tx_queues)) {
1717 do {
1718 txq -= dev->real_num_tx_queues;
1719 } while (txq >= dev->real_num_tx_queues);
1720 }
1721 return txq;
1722 }
1723
1724 static void team_change_rx_flags(struct net_device *dev, int change)
1725 {
1726 struct team *team = netdev_priv(dev);
1727 struct team_port *port;
1728 int inc;
1729
1730 rcu_read_lock();
1731 list_for_each_entry_rcu(port, &team->port_list, list) {
1732 if (change & IFF_PROMISC) {
1733 inc = dev->flags & IFF_PROMISC ? 1 : -1;
1734 dev_set_promiscuity(port->dev, inc);
1735 }
1736 if (change & IFF_ALLMULTI) {
1737 inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1738 dev_set_allmulti(port->dev, inc);
1739 }
1740 }
1741 rcu_read_unlock();
1742 }
1743
1744 static void team_set_rx_mode(struct net_device *dev)
1745 {
1746 struct team *team = netdev_priv(dev);
1747 struct team_port *port;
1748
1749 rcu_read_lock();
1750 list_for_each_entry_rcu(port, &team->port_list, list) {
1751 dev_uc_sync_multiple(port->dev, dev);
1752 dev_mc_sync_multiple(port->dev, dev);
1753 }
1754 rcu_read_unlock();
1755 }
1756
1757 static int team_set_mac_address(struct net_device *dev, void *p)
1758 {
1759 struct sockaddr *addr = p;
1760 struct team *team = netdev_priv(dev);
1761 struct team_port *port;
1762
1763 if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1764 return -EADDRNOTAVAIL;
1765 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1766 mutex_lock(&team->lock);
1767 list_for_each_entry(port, &team->port_list, list)
1768 if (team->ops.port_change_dev_addr)
1769 team->ops.port_change_dev_addr(team, port);
1770 mutex_unlock(&team->lock);
1771 return 0;
1772 }
1773
1774 static int team_change_mtu(struct net_device *dev, int new_mtu)
1775 {
1776 struct team *team = netdev_priv(dev);
1777 struct team_port *port;
1778 int err;
1779
1780 /*
1781 * Alhough this is reader, it's guarded by team lock. It's not possible
1782 * to traverse list in reverse under rcu_read_lock
1783 */
1784 mutex_lock(&team->lock);
1785 team->port_mtu_change_allowed = true;
1786 list_for_each_entry(port, &team->port_list, list) {
1787 err = dev_set_mtu(port->dev, new_mtu);
1788 if (err) {
1789 netdev_err(dev, "Device %s failed to change mtu",
1790 port->dev->name);
1791 goto unwind;
1792 }
1793 }
1794 team->port_mtu_change_allowed = false;
1795 mutex_unlock(&team->lock);
1796
1797 dev->mtu = new_mtu;
1798
1799 return 0;
1800
1801 unwind:
1802 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1803 dev_set_mtu(port->dev, dev->mtu);
1804 team->port_mtu_change_allowed = false;
1805 mutex_unlock(&team->lock);
1806
1807 return err;
1808 }
1809
1810 static void
1811 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1812 {
1813 struct team *team = netdev_priv(dev);
1814 struct team_pcpu_stats *p;
1815 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1816 u32 rx_dropped = 0, tx_dropped = 0, rx_nohandler = 0;
1817 unsigned int start;
1818 int i;
1819
1820 for_each_possible_cpu(i) {
1821 p = per_cpu_ptr(team->pcpu_stats, i);
1822 do {
1823 start = u64_stats_fetch_begin_irq(&p->syncp);
1824 rx_packets = p->rx_packets;
1825 rx_bytes = p->rx_bytes;
1826 rx_multicast = p->rx_multicast;
1827 tx_packets = p->tx_packets;
1828 tx_bytes = p->tx_bytes;
1829 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
1830
1831 stats->rx_packets += rx_packets;
1832 stats->rx_bytes += rx_bytes;
1833 stats->multicast += rx_multicast;
1834 stats->tx_packets += tx_packets;
1835 stats->tx_bytes += tx_bytes;
1836 /*
1837 * rx_dropped, tx_dropped & rx_nohandler are u32,
1838 * updated without syncp protection.
1839 */
1840 rx_dropped += p->rx_dropped;
1841 tx_dropped += p->tx_dropped;
1842 rx_nohandler += p->rx_nohandler;
1843 }
1844 stats->rx_dropped = rx_dropped;
1845 stats->tx_dropped = tx_dropped;
1846 stats->rx_nohandler = rx_nohandler;
1847 }
1848
1849 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1850 {
1851 struct team *team = netdev_priv(dev);
1852 struct team_port *port;
1853 int err;
1854
1855 /*
1856 * Alhough this is reader, it's guarded by team lock. It's not possible
1857 * to traverse list in reverse under rcu_read_lock
1858 */
1859 mutex_lock(&team->lock);
1860 list_for_each_entry(port, &team->port_list, list) {
1861 err = vlan_vid_add(port->dev, proto, vid);
1862 if (err)
1863 goto unwind;
1864 }
1865 mutex_unlock(&team->lock);
1866
1867 return 0;
1868
1869 unwind:
1870 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1871 vlan_vid_del(port->dev, proto, vid);
1872 mutex_unlock(&team->lock);
1873
1874 return err;
1875 }
1876
1877 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1878 {
1879 struct team *team = netdev_priv(dev);
1880 struct team_port *port;
1881
1882 mutex_lock(&team->lock);
1883 list_for_each_entry(port, &team->port_list, list)
1884 vlan_vid_del(port->dev, proto, vid);
1885 mutex_unlock(&team->lock);
1886
1887 return 0;
1888 }
1889
1890 #ifdef CONFIG_NET_POLL_CONTROLLER
1891 static void team_poll_controller(struct net_device *dev)
1892 {
1893 }
1894
1895 static void __team_netpoll_cleanup(struct team *team)
1896 {
1897 struct team_port *port;
1898
1899 list_for_each_entry(port, &team->port_list, list)
1900 team_port_disable_netpoll(port);
1901 }
1902
1903 static void team_netpoll_cleanup(struct net_device *dev)
1904 {
1905 struct team *team = netdev_priv(dev);
1906
1907 mutex_lock(&team->lock);
1908 __team_netpoll_cleanup(team);
1909 mutex_unlock(&team->lock);
1910 }
1911
1912 static int team_netpoll_setup(struct net_device *dev,
1913 struct netpoll_info *npifo)
1914 {
1915 struct team *team = netdev_priv(dev);
1916 struct team_port *port;
1917 int err = 0;
1918
1919 mutex_lock(&team->lock);
1920 list_for_each_entry(port, &team->port_list, list) {
1921 err = __team_port_enable_netpoll(port);
1922 if (err) {
1923 __team_netpoll_cleanup(team);
1924 break;
1925 }
1926 }
1927 mutex_unlock(&team->lock);
1928 return err;
1929 }
1930 #endif
1931
1932 static int team_add_slave(struct net_device *dev, struct net_device *port_dev,
1933 struct netlink_ext_ack *extack)
1934 {
1935 struct team *team = netdev_priv(dev);
1936 int err;
1937
1938 mutex_lock(&team->lock);
1939 err = team_port_add(team, port_dev);
1940 mutex_unlock(&team->lock);
1941
1942 if (!err)
1943 netdev_change_features(dev);
1944
1945 return err;
1946 }
1947
1948 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1949 {
1950 struct team *team = netdev_priv(dev);
1951 int err;
1952
1953 mutex_lock(&team->lock);
1954 err = team_port_del(team, port_dev);
1955 mutex_unlock(&team->lock);
1956
1957 if (!err)
1958 netdev_change_features(dev);
1959
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_features_check = passthru_features_check,
2024 };
2025
2026 /***********************
2027 * ethtool interface
2028 ***********************/
2029
2030 static void team_ethtool_get_drvinfo(struct net_device *dev,
2031 struct ethtool_drvinfo *drvinfo)
2032 {
2033 strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
2034 strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2035 }
2036
2037 static const struct ethtool_ops team_ethtool_ops = {
2038 .get_drvinfo = team_ethtool_get_drvinfo,
2039 .get_link = ethtool_op_get_link,
2040 };
2041
2042 /***********************
2043 * rt netlink interface
2044 ***********************/
2045
2046 static void team_setup_by_port(struct net_device *dev,
2047 struct net_device *port_dev)
2048 {
2049 dev->header_ops = port_dev->header_ops;
2050 dev->type = port_dev->type;
2051 dev->hard_header_len = port_dev->hard_header_len;
2052 dev->addr_len = port_dev->addr_len;
2053 dev->mtu = port_dev->mtu;
2054 memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2055 eth_hw_addr_inherit(dev, port_dev);
2056 }
2057
2058 static int team_dev_type_check_change(struct net_device *dev,
2059 struct net_device *port_dev)
2060 {
2061 struct team *team = netdev_priv(dev);
2062 char *portname = port_dev->name;
2063 int err;
2064
2065 if (dev->type == port_dev->type)
2066 return 0;
2067 if (!list_empty(&team->port_list)) {
2068 netdev_err(dev, "Device %s is of different type\n", portname);
2069 return -EBUSY;
2070 }
2071 err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2072 err = notifier_to_errno(err);
2073 if (err) {
2074 netdev_err(dev, "Refused to change device type\n");
2075 return err;
2076 }
2077 dev_uc_flush(dev);
2078 dev_mc_flush(dev);
2079 team_setup_by_port(dev, port_dev);
2080 call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2081 return 0;
2082 }
2083
2084 static void team_setup(struct net_device *dev)
2085 {
2086 ether_setup(dev);
2087 dev->max_mtu = ETH_MAX_MTU;
2088
2089 dev->netdev_ops = &team_netdev_ops;
2090 dev->ethtool_ops = &team_ethtool_ops;
2091 dev->needs_free_netdev = true;
2092 dev->priv_destructor = team_destructor;
2093 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2094 dev->priv_flags |= IFF_NO_QUEUE;
2095 dev->priv_flags |= IFF_TEAM;
2096
2097 /*
2098 * Indicate we support unicast address filtering. That way core won't
2099 * bring us to promisc mode in case a unicast addr is added.
2100 * Let this up to underlay drivers.
2101 */
2102 dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2103
2104 dev->features |= NETIF_F_LLTX;
2105 dev->features |= NETIF_F_GRO;
2106
2107 /* Don't allow team devices to change network namespaces. */
2108 dev->features |= NETIF_F_NETNS_LOCAL;
2109
2110 dev->hw_features = TEAM_VLAN_FEATURES |
2111 NETIF_F_HW_VLAN_CTAG_TX |
2112 NETIF_F_HW_VLAN_CTAG_RX |
2113 NETIF_F_HW_VLAN_CTAG_FILTER;
2114
2115 dev->hw_features |= NETIF_F_GSO_ENCAP_ALL;
2116 dev->features |= dev->hw_features;
2117 }
2118
2119 static int team_newlink(struct net *src_net, struct net_device *dev,
2120 struct nlattr *tb[], struct nlattr *data[],
2121 struct netlink_ext_ack *extack)
2122 {
2123 if (tb[IFLA_ADDRESS] == NULL)
2124 eth_hw_addr_random(dev);
2125
2126 return register_netdevice(dev);
2127 }
2128
2129 static int team_validate(struct nlattr *tb[], struct nlattr *data[],
2130 struct netlink_ext_ack *extack)
2131 {
2132 if (tb[IFLA_ADDRESS]) {
2133 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2134 return -EINVAL;
2135 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2136 return -EADDRNOTAVAIL;
2137 }
2138 return 0;
2139 }
2140
2141 static unsigned int team_get_num_tx_queues(void)
2142 {
2143 return TEAM_DEFAULT_NUM_TX_QUEUES;
2144 }
2145
2146 static unsigned int team_get_num_rx_queues(void)
2147 {
2148 return TEAM_DEFAULT_NUM_RX_QUEUES;
2149 }
2150
2151 static struct rtnl_link_ops team_link_ops __read_mostly = {
2152 .kind = DRV_NAME,
2153 .priv_size = sizeof(struct team),
2154 .setup = team_setup,
2155 .newlink = team_newlink,
2156 .validate = team_validate,
2157 .get_num_tx_queues = team_get_num_tx_queues,
2158 .get_num_rx_queues = team_get_num_rx_queues,
2159 };
2160
2161
2162 /***********************************
2163 * Generic netlink custom interface
2164 ***********************************/
2165
2166 static struct genl_family team_nl_family;
2167
2168 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2169 [TEAM_ATTR_UNSPEC] = { .type = NLA_UNSPEC, },
2170 [TEAM_ATTR_TEAM_IFINDEX] = { .type = NLA_U32 },
2171 [TEAM_ATTR_LIST_OPTION] = { .type = NLA_NESTED },
2172 [TEAM_ATTR_LIST_PORT] = { .type = NLA_NESTED },
2173 };
2174
2175 static const struct nla_policy
2176 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2177 [TEAM_ATTR_OPTION_UNSPEC] = { .type = NLA_UNSPEC, },
2178 [TEAM_ATTR_OPTION_NAME] = {
2179 .type = NLA_STRING,
2180 .len = TEAM_STRING_MAX_LEN,
2181 },
2182 [TEAM_ATTR_OPTION_CHANGED] = { .type = NLA_FLAG },
2183 [TEAM_ATTR_OPTION_TYPE] = { .type = NLA_U8 },
2184 [TEAM_ATTR_OPTION_DATA] = { .type = NLA_BINARY },
2185 };
2186
2187 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2188 {
2189 struct sk_buff *msg;
2190 void *hdr;
2191 int err;
2192
2193 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2194 if (!msg)
2195 return -ENOMEM;
2196
2197 hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2198 &team_nl_family, 0, TEAM_CMD_NOOP);
2199 if (!hdr) {
2200 err = -EMSGSIZE;
2201 goto err_msg_put;
2202 }
2203
2204 genlmsg_end(msg, hdr);
2205
2206 return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2207
2208 err_msg_put:
2209 nlmsg_free(msg);
2210
2211 return err;
2212 }
2213
2214 /*
2215 * Netlink cmd functions should be locked by following two functions.
2216 * Since dev gets held here, that ensures dev won't disappear in between.
2217 */
2218 static struct team *team_nl_team_get(struct genl_info *info)
2219 {
2220 struct net *net = genl_info_net(info);
2221 int ifindex;
2222 struct net_device *dev;
2223 struct team *team;
2224
2225 if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2226 return NULL;
2227
2228 ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2229 dev = dev_get_by_index(net, ifindex);
2230 if (!dev || dev->netdev_ops != &team_netdev_ops) {
2231 if (dev)
2232 dev_put(dev);
2233 return NULL;
2234 }
2235
2236 team = netdev_priv(dev);
2237 mutex_lock(&team->lock);
2238 return team;
2239 }
2240
2241 static void team_nl_team_put(struct team *team)
2242 {
2243 mutex_unlock(&team->lock);
2244 dev_put(team->dev);
2245 }
2246
2247 typedef int team_nl_send_func_t(struct sk_buff *skb,
2248 struct team *team, u32 portid);
2249
2250 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2251 {
2252 return genlmsg_unicast(dev_net(team->dev), skb, portid);
2253 }
2254
2255 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2256 struct team_option_inst *opt_inst)
2257 {
2258 struct nlattr *option_item;
2259 struct team_option *option = opt_inst->option;
2260 struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2261 struct team_gsetter_ctx ctx;
2262 int err;
2263
2264 ctx.info = opt_inst_info;
2265 err = team_option_get(team, opt_inst, &ctx);
2266 if (err)
2267 return err;
2268
2269 option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
2270 if (!option_item)
2271 return -EMSGSIZE;
2272
2273 if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2274 goto nest_cancel;
2275 if (opt_inst_info->port &&
2276 nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2277 opt_inst_info->port->dev->ifindex))
2278 goto nest_cancel;
2279 if (opt_inst->option->array_size &&
2280 nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2281 opt_inst_info->array_index))
2282 goto nest_cancel;
2283
2284 switch (option->type) {
2285 case TEAM_OPTION_TYPE_U32:
2286 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2287 goto nest_cancel;
2288 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2289 goto nest_cancel;
2290 break;
2291 case TEAM_OPTION_TYPE_STRING:
2292 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2293 goto nest_cancel;
2294 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2295 ctx.data.str_val))
2296 goto nest_cancel;
2297 break;
2298 case TEAM_OPTION_TYPE_BINARY:
2299 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2300 goto nest_cancel;
2301 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2302 ctx.data.bin_val.ptr))
2303 goto nest_cancel;
2304 break;
2305 case TEAM_OPTION_TYPE_BOOL:
2306 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2307 goto nest_cancel;
2308 if (ctx.data.bool_val &&
2309 nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2310 goto nest_cancel;
2311 break;
2312 case TEAM_OPTION_TYPE_S32:
2313 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2314 goto nest_cancel;
2315 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2316 goto nest_cancel;
2317 break;
2318 default:
2319 BUG();
2320 }
2321 if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2322 goto nest_cancel;
2323 if (opt_inst->changed) {
2324 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2325 goto nest_cancel;
2326 opt_inst->changed = false;
2327 }
2328 nla_nest_end(skb, option_item);
2329 return 0;
2330
2331 nest_cancel:
2332 nla_nest_cancel(skb, option_item);
2333 return -EMSGSIZE;
2334 }
2335
2336 static int __send_and_alloc_skb(struct sk_buff **pskb,
2337 struct team *team, u32 portid,
2338 team_nl_send_func_t *send_func)
2339 {
2340 int err;
2341
2342 if (*pskb) {
2343 err = send_func(*pskb, team, portid);
2344 if (err)
2345 return err;
2346 }
2347 *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2348 if (!*pskb)
2349 return -ENOMEM;
2350 return 0;
2351 }
2352
2353 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2354 int flags, team_nl_send_func_t *send_func,
2355 struct list_head *sel_opt_inst_list)
2356 {
2357 struct nlattr *option_list;
2358 struct nlmsghdr *nlh;
2359 void *hdr;
2360 struct team_option_inst *opt_inst;
2361 int err;
2362 struct sk_buff *skb = NULL;
2363 bool incomplete;
2364 int i;
2365
2366 opt_inst = list_first_entry(sel_opt_inst_list,
2367 struct team_option_inst, tmp_list);
2368
2369 start_again:
2370 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2371 if (err)
2372 return err;
2373
2374 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2375 TEAM_CMD_OPTIONS_GET);
2376 if (!hdr) {
2377 nlmsg_free(skb);
2378 return -EMSGSIZE;
2379 }
2380
2381 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2382 goto nla_put_failure;
2383 option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2384 if (!option_list)
2385 goto nla_put_failure;
2386
2387 i = 0;
2388 incomplete = false;
2389 list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2390 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2391 if (err) {
2392 if (err == -EMSGSIZE) {
2393 if (!i)
2394 goto errout;
2395 incomplete = true;
2396 break;
2397 }
2398 goto errout;
2399 }
2400 i++;
2401 }
2402
2403 nla_nest_end(skb, option_list);
2404 genlmsg_end(skb, hdr);
2405 if (incomplete)
2406 goto start_again;
2407
2408 send_done:
2409 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2410 if (!nlh) {
2411 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2412 if (err)
2413 return err;
2414 goto send_done;
2415 }
2416
2417 return send_func(skb, team, portid);
2418
2419 nla_put_failure:
2420 err = -EMSGSIZE;
2421 errout:
2422 genlmsg_cancel(skb, hdr);
2423 nlmsg_free(skb);
2424 return err;
2425 }
2426
2427 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2428 {
2429 struct team *team;
2430 struct team_option_inst *opt_inst;
2431 int err;
2432 LIST_HEAD(sel_opt_inst_list);
2433
2434 team = team_nl_team_get(info);
2435 if (!team)
2436 return -EINVAL;
2437
2438 list_for_each_entry(opt_inst, &team->option_inst_list, list)
2439 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2440 err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2441 NLM_F_ACK, team_nl_send_unicast,
2442 &sel_opt_inst_list);
2443
2444 team_nl_team_put(team);
2445
2446 return err;
2447 }
2448
2449 static int team_nl_send_event_options_get(struct team *team,
2450 struct list_head *sel_opt_inst_list);
2451
2452 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2453 {
2454 struct team *team;
2455 int err = 0;
2456 int i;
2457 struct nlattr *nl_option;
2458 LIST_HEAD(opt_inst_list);
2459
2460 rtnl_lock();
2461
2462 team = team_nl_team_get(info);
2463 if (!team) {
2464 err = -EINVAL;
2465 goto rtnl_unlock;
2466 }
2467
2468 err = -EINVAL;
2469 if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2470 err = -EINVAL;
2471 goto team_put;
2472 }
2473
2474 nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2475 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2476 struct nlattr *attr;
2477 struct nlattr *attr_data;
2478 enum team_option_type opt_type;
2479 int opt_port_ifindex = 0; /* != 0 for per-port options */
2480 u32 opt_array_index = 0;
2481 bool opt_is_array = false;
2482 struct team_option_inst *opt_inst;
2483 char *opt_name;
2484 bool opt_found = false;
2485
2486 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2487 err = -EINVAL;
2488 goto team_put;
2489 }
2490 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2491 nl_option, team_nl_option_policy,
2492 info->extack);
2493 if (err)
2494 goto team_put;
2495 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2496 !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2497 err = -EINVAL;
2498 goto team_put;
2499 }
2500 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2501 case NLA_U32:
2502 opt_type = TEAM_OPTION_TYPE_U32;
2503 break;
2504 case NLA_STRING:
2505 opt_type = TEAM_OPTION_TYPE_STRING;
2506 break;
2507 case NLA_BINARY:
2508 opt_type = TEAM_OPTION_TYPE_BINARY;
2509 break;
2510 case NLA_FLAG:
2511 opt_type = TEAM_OPTION_TYPE_BOOL;
2512 break;
2513 case NLA_S32:
2514 opt_type = TEAM_OPTION_TYPE_S32;
2515 break;
2516 default:
2517 goto team_put;
2518 }
2519
2520 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2521 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2522 err = -EINVAL;
2523 goto team_put;
2524 }
2525
2526 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2527 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2528 if (attr)
2529 opt_port_ifindex = nla_get_u32(attr);
2530
2531 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2532 if (attr) {
2533 opt_is_array = true;
2534 opt_array_index = nla_get_u32(attr);
2535 }
2536
2537 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2538 struct team_option *option = opt_inst->option;
2539 struct team_gsetter_ctx ctx;
2540 struct team_option_inst_info *opt_inst_info;
2541 int tmp_ifindex;
2542
2543 opt_inst_info = &opt_inst->info;
2544 tmp_ifindex = opt_inst_info->port ?
2545 opt_inst_info->port->dev->ifindex : 0;
2546 if (option->type != opt_type ||
2547 strcmp(option->name, opt_name) ||
2548 tmp_ifindex != opt_port_ifindex ||
2549 (option->array_size && !opt_is_array) ||
2550 opt_inst_info->array_index != opt_array_index)
2551 continue;
2552 opt_found = true;
2553 ctx.info = opt_inst_info;
2554 switch (opt_type) {
2555 case TEAM_OPTION_TYPE_U32:
2556 ctx.data.u32_val = nla_get_u32(attr_data);
2557 break;
2558 case TEAM_OPTION_TYPE_STRING:
2559 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2560 err = -EINVAL;
2561 goto team_put;
2562 }
2563 ctx.data.str_val = nla_data(attr_data);
2564 break;
2565 case TEAM_OPTION_TYPE_BINARY:
2566 ctx.data.bin_val.len = nla_len(attr_data);
2567 ctx.data.bin_val.ptr = nla_data(attr_data);
2568 break;
2569 case TEAM_OPTION_TYPE_BOOL:
2570 ctx.data.bool_val = attr_data ? true : false;
2571 break;
2572 case TEAM_OPTION_TYPE_S32:
2573 ctx.data.s32_val = nla_get_s32(attr_data);
2574 break;
2575 default:
2576 BUG();
2577 }
2578 err = team_option_set(team, opt_inst, &ctx);
2579 if (err)
2580 goto team_put;
2581 opt_inst->changed = true;
2582
2583 /* dumb/evil user-space can send us duplicate opt,
2584 * keep only the last one
2585 */
2586 if (__team_option_inst_tmp_find(&opt_inst_list,
2587 opt_inst))
2588 continue;
2589
2590 list_add(&opt_inst->tmp_list, &opt_inst_list);
2591 }
2592 if (!opt_found) {
2593 err = -ENOENT;
2594 goto team_put;
2595 }
2596 }
2597
2598 err = team_nl_send_event_options_get(team, &opt_inst_list);
2599
2600 team_put:
2601 team_nl_team_put(team);
2602 rtnl_unlock:
2603 rtnl_unlock();
2604 return err;
2605 }
2606
2607 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2608 struct team_port *port)
2609 {
2610 struct nlattr *port_item;
2611
2612 port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2613 if (!port_item)
2614 goto nest_cancel;
2615 if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2616 goto nest_cancel;
2617 if (port->changed) {
2618 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2619 goto nest_cancel;
2620 port->changed = false;
2621 }
2622 if ((port->removed &&
2623 nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2624 (port->state.linkup &&
2625 nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2626 nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2627 nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2628 goto nest_cancel;
2629 nla_nest_end(skb, port_item);
2630 return 0;
2631
2632 nest_cancel:
2633 nla_nest_cancel(skb, port_item);
2634 return -EMSGSIZE;
2635 }
2636
2637 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2638 int flags, team_nl_send_func_t *send_func,
2639 struct team_port *one_port)
2640 {
2641 struct nlattr *port_list;
2642 struct nlmsghdr *nlh;
2643 void *hdr;
2644 struct team_port *port;
2645 int err;
2646 struct sk_buff *skb = NULL;
2647 bool incomplete;
2648 int i;
2649
2650 port = list_first_entry_or_null(&team->port_list,
2651 struct team_port, list);
2652
2653 start_again:
2654 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2655 if (err)
2656 return err;
2657
2658 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2659 TEAM_CMD_PORT_LIST_GET);
2660 if (!hdr) {
2661 nlmsg_free(skb);
2662 return -EMSGSIZE;
2663 }
2664
2665 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2666 goto nla_put_failure;
2667 port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2668 if (!port_list)
2669 goto nla_put_failure;
2670
2671 i = 0;
2672 incomplete = false;
2673
2674 /* If one port is selected, called wants to send port list containing
2675 * only this port. Otherwise go through all listed ports and send all
2676 */
2677 if (one_port) {
2678 err = team_nl_fill_one_port_get(skb, one_port);
2679 if (err)
2680 goto errout;
2681 } else if (port) {
2682 list_for_each_entry_from(port, &team->port_list, list) {
2683 err = team_nl_fill_one_port_get(skb, port);
2684 if (err) {
2685 if (err == -EMSGSIZE) {
2686 if (!i)
2687 goto errout;
2688 incomplete = true;
2689 break;
2690 }
2691 goto errout;
2692 }
2693 i++;
2694 }
2695 }
2696
2697 nla_nest_end(skb, port_list);
2698 genlmsg_end(skb, hdr);
2699 if (incomplete)
2700 goto start_again;
2701
2702 send_done:
2703 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2704 if (!nlh) {
2705 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2706 if (err)
2707 return err;
2708 goto send_done;
2709 }
2710
2711 return send_func(skb, team, portid);
2712
2713 nla_put_failure:
2714 err = -EMSGSIZE;
2715 errout:
2716 genlmsg_cancel(skb, hdr);
2717 nlmsg_free(skb);
2718 return err;
2719 }
2720
2721 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2722 struct genl_info *info)
2723 {
2724 struct team *team;
2725 int err;
2726
2727 team = team_nl_team_get(info);
2728 if (!team)
2729 return -EINVAL;
2730
2731 err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2732 NLM_F_ACK, team_nl_send_unicast, NULL);
2733
2734 team_nl_team_put(team);
2735
2736 return err;
2737 }
2738
2739 static const struct genl_ops team_nl_ops[] = {
2740 {
2741 .cmd = TEAM_CMD_NOOP,
2742 .doit = team_nl_cmd_noop,
2743 .policy = team_nl_policy,
2744 },
2745 {
2746 .cmd = TEAM_CMD_OPTIONS_SET,
2747 .doit = team_nl_cmd_options_set,
2748 .policy = team_nl_policy,
2749 .flags = GENL_ADMIN_PERM,
2750 },
2751 {
2752 .cmd = TEAM_CMD_OPTIONS_GET,
2753 .doit = team_nl_cmd_options_get,
2754 .policy = team_nl_policy,
2755 .flags = GENL_ADMIN_PERM,
2756 },
2757 {
2758 .cmd = TEAM_CMD_PORT_LIST_GET,
2759 .doit = team_nl_cmd_port_list_get,
2760 .policy = team_nl_policy,
2761 .flags = GENL_ADMIN_PERM,
2762 },
2763 };
2764
2765 static const struct genl_multicast_group team_nl_mcgrps[] = {
2766 { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2767 };
2768
2769 static struct genl_family team_nl_family __ro_after_init = {
2770 .name = TEAM_GENL_NAME,
2771 .version = TEAM_GENL_VERSION,
2772 .maxattr = TEAM_ATTR_MAX,
2773 .netnsok = true,
2774 .module = THIS_MODULE,
2775 .ops = team_nl_ops,
2776 .n_ops = ARRAY_SIZE(team_nl_ops),
2777 .mcgrps = team_nl_mcgrps,
2778 .n_mcgrps = ARRAY_SIZE(team_nl_mcgrps),
2779 };
2780
2781 static int team_nl_send_multicast(struct sk_buff *skb,
2782 struct team *team, u32 portid)
2783 {
2784 return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2785 skb, 0, 0, GFP_KERNEL);
2786 }
2787
2788 static int team_nl_send_event_options_get(struct team *team,
2789 struct list_head *sel_opt_inst_list)
2790 {
2791 return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2792 sel_opt_inst_list);
2793 }
2794
2795 static int team_nl_send_event_port_get(struct team *team,
2796 struct team_port *port)
2797 {
2798 return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2799 port);
2800 }
2801
2802 static int __init team_nl_init(void)
2803 {
2804 return genl_register_family(&team_nl_family);
2805 }
2806
2807 static void team_nl_fini(void)
2808 {
2809 genl_unregister_family(&team_nl_family);
2810 }
2811
2812
2813 /******************
2814 * Change checkers
2815 ******************/
2816
2817 static void __team_options_change_check(struct team *team)
2818 {
2819 int err;
2820 struct team_option_inst *opt_inst;
2821 LIST_HEAD(sel_opt_inst_list);
2822
2823 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2824 if (opt_inst->changed)
2825 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2826 }
2827 err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2828 if (err && err != -ESRCH)
2829 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2830 err);
2831 }
2832
2833 /* rtnl lock is held */
2834
2835 static void __team_port_change_send(struct team_port *port, bool linkup)
2836 {
2837 int err;
2838
2839 port->changed = true;
2840 port->state.linkup = linkup;
2841 team_refresh_port_linkup(port);
2842 if (linkup) {
2843 struct ethtool_link_ksettings ecmd;
2844
2845 err = __ethtool_get_link_ksettings(port->dev, &ecmd);
2846 if (!err) {
2847 port->state.speed = ecmd.base.speed;
2848 port->state.duplex = ecmd.base.duplex;
2849 goto send_event;
2850 }
2851 }
2852 port->state.speed = 0;
2853 port->state.duplex = 0;
2854
2855 send_event:
2856 err = team_nl_send_event_port_get(port->team, port);
2857 if (err && err != -ESRCH)
2858 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2859 port->dev->name, err);
2860
2861 }
2862
2863 static void __team_carrier_check(struct team *team)
2864 {
2865 struct team_port *port;
2866 bool team_linkup;
2867
2868 if (team->user_carrier_enabled)
2869 return;
2870
2871 team_linkup = false;
2872 list_for_each_entry(port, &team->port_list, list) {
2873 if (port->linkup) {
2874 team_linkup = true;
2875 break;
2876 }
2877 }
2878
2879 if (team_linkup)
2880 netif_carrier_on(team->dev);
2881 else
2882 netif_carrier_off(team->dev);
2883 }
2884
2885 static void __team_port_change_check(struct team_port *port, bool linkup)
2886 {
2887 if (port->state.linkup != linkup)
2888 __team_port_change_send(port, linkup);
2889 __team_carrier_check(port->team);
2890 }
2891
2892 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2893 {
2894 __team_port_change_send(port, linkup);
2895 __team_carrier_check(port->team);
2896 }
2897
2898 static void __team_port_change_port_removed(struct team_port *port)
2899 {
2900 port->removed = true;
2901 __team_port_change_send(port, false);
2902 __team_carrier_check(port->team);
2903 }
2904
2905 static void team_port_change_check(struct team_port *port, bool linkup)
2906 {
2907 struct team *team = port->team;
2908
2909 mutex_lock(&team->lock);
2910 __team_port_change_check(port, linkup);
2911 mutex_unlock(&team->lock);
2912 }
2913
2914
2915 /************************************
2916 * Net device notifier event handler
2917 ************************************/
2918
2919 static int team_device_event(struct notifier_block *unused,
2920 unsigned long event, void *ptr)
2921 {
2922 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2923 struct team_port *port;
2924
2925 port = team_port_get_rtnl(dev);
2926 if (!port)
2927 return NOTIFY_DONE;
2928
2929 switch (event) {
2930 case NETDEV_UP:
2931 if (netif_carrier_ok(dev))
2932 team_port_change_check(port, true);
2933 break;
2934 case NETDEV_DOWN:
2935 team_port_change_check(port, false);
2936 break;
2937 case NETDEV_CHANGE:
2938 if (netif_running(port->dev))
2939 team_port_change_check(port,
2940 !!netif_carrier_ok(port->dev));
2941 break;
2942 case NETDEV_UNREGISTER:
2943 team_del_slave(port->team->dev, dev);
2944 break;
2945 case NETDEV_FEAT_CHANGE:
2946 team_compute_features(port->team);
2947 break;
2948 case NETDEV_PRECHANGEMTU:
2949 /* Forbid to change mtu of underlaying device */
2950 if (!port->team->port_mtu_change_allowed)
2951 return NOTIFY_BAD;
2952 break;
2953 case NETDEV_PRE_TYPE_CHANGE:
2954 /* Forbid to change type of underlaying device */
2955 return NOTIFY_BAD;
2956 case NETDEV_RESEND_IGMP:
2957 /* Propagate to master device */
2958 call_netdevice_notifiers(event, port->team->dev);
2959 break;
2960 }
2961 return NOTIFY_DONE;
2962 }
2963
2964 static struct notifier_block team_notifier_block __read_mostly = {
2965 .notifier_call = team_device_event,
2966 };
2967
2968
2969 /***********************
2970 * Module init and exit
2971 ***********************/
2972
2973 static int __init team_module_init(void)
2974 {
2975 int err;
2976
2977 register_netdevice_notifier(&team_notifier_block);
2978
2979 err = rtnl_link_register(&team_link_ops);
2980 if (err)
2981 goto err_rtnl_reg;
2982
2983 err = team_nl_init();
2984 if (err)
2985 goto err_nl_init;
2986
2987 return 0;
2988
2989 err_nl_init:
2990 rtnl_link_unregister(&team_link_ops);
2991
2992 err_rtnl_reg:
2993 unregister_netdevice_notifier(&team_notifier_block);
2994
2995 return err;
2996 }
2997
2998 static void __exit team_module_exit(void)
2999 {
3000 team_nl_fini();
3001 rtnl_link_unregister(&team_link_ops);
3002 unregister_netdevice_notifier(&team_notifier_block);
3003 }
3004
3005 module_init(team_module_init);
3006 module_exit(team_module_exit);
3007
3008 MODULE_LICENSE("GPL v2");
3009 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
3010 MODULE_DESCRIPTION("Ethernet team device driver");
3011 MODULE_ALIAS_RTNL_LINK(DRV_NAME);
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