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[mirror_ubuntu-jammy-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_array(queue_cnt, sizeof(struct list_head),
795 GFP_KERNEL);
796 if (!listarr)
797 return -ENOMEM;
798 team->qom_lists = listarr;
799 for (i = 0; i < queue_cnt; i++)
800 INIT_LIST_HEAD(listarr++);
801 return 0;
802 }
803
804 static void team_queue_override_fini(struct team *team)
805 {
806 kfree(team->qom_lists);
807 }
808
809 static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
810 {
811 return &team->qom_lists[queue_id - 1];
812 }
813
814 /*
815 * note: already called with rcu_read_lock
816 */
817 static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
818 {
819 struct list_head *qom_list;
820 struct team_port *port;
821
822 if (!team->queue_override_enabled || !skb->queue_mapping)
823 return false;
824 qom_list = __team_get_qom_list(team, skb->queue_mapping);
825 list_for_each_entry_rcu(port, qom_list, qom_list) {
826 if (!team_dev_queue_xmit(team, port, skb))
827 return true;
828 }
829 return false;
830 }
831
832 static void __team_queue_override_port_del(struct team *team,
833 struct team_port *port)
834 {
835 if (!port->queue_id)
836 return;
837 list_del_rcu(&port->qom_list);
838 }
839
840 static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
841 struct team_port *cur)
842 {
843 if (port->priority < cur->priority)
844 return true;
845 if (port->priority > cur->priority)
846 return false;
847 if (port->index < cur->index)
848 return true;
849 return false;
850 }
851
852 static void __team_queue_override_port_add(struct team *team,
853 struct team_port *port)
854 {
855 struct team_port *cur;
856 struct list_head *qom_list;
857 struct list_head *node;
858
859 if (!port->queue_id)
860 return;
861 qom_list = __team_get_qom_list(team, port->queue_id);
862 node = qom_list;
863 list_for_each_entry(cur, qom_list, qom_list) {
864 if (team_queue_override_port_has_gt_prio_than(port, cur))
865 break;
866 node = &cur->qom_list;
867 }
868 list_add_tail_rcu(&port->qom_list, node);
869 }
870
871 static void __team_queue_override_enabled_check(struct team *team)
872 {
873 struct team_port *port;
874 bool enabled = false;
875
876 list_for_each_entry(port, &team->port_list, list) {
877 if (port->queue_id) {
878 enabled = true;
879 break;
880 }
881 }
882 if (enabled == team->queue_override_enabled)
883 return;
884 netdev_dbg(team->dev, "%s queue override\n",
885 enabled ? "Enabling" : "Disabling");
886 team->queue_override_enabled = enabled;
887 }
888
889 static void team_queue_override_port_prio_changed(struct team *team,
890 struct team_port *port)
891 {
892 if (!port->queue_id || team_port_enabled(port))
893 return;
894 __team_queue_override_port_del(team, port);
895 __team_queue_override_port_add(team, port);
896 __team_queue_override_enabled_check(team);
897 }
898
899 static void team_queue_override_port_change_queue_id(struct team *team,
900 struct team_port *port,
901 u16 new_queue_id)
902 {
903 if (team_port_enabled(port)) {
904 __team_queue_override_port_del(team, port);
905 port->queue_id = new_queue_id;
906 __team_queue_override_port_add(team, port);
907 __team_queue_override_enabled_check(team);
908 } else {
909 port->queue_id = new_queue_id;
910 }
911 }
912
913 static void team_queue_override_port_add(struct team *team,
914 struct team_port *port)
915 {
916 __team_queue_override_port_add(team, port);
917 __team_queue_override_enabled_check(team);
918 }
919
920 static void team_queue_override_port_del(struct team *team,
921 struct team_port *port)
922 {
923 __team_queue_override_port_del(team, port);
924 __team_queue_override_enabled_check(team);
925 }
926
927
928 /****************
929 * Port handling
930 ****************/
931
932 static bool team_port_find(const struct team *team,
933 const struct team_port *port)
934 {
935 struct team_port *cur;
936
937 list_for_each_entry(cur, &team->port_list, list)
938 if (cur == port)
939 return true;
940 return false;
941 }
942
943 /*
944 * Enable/disable port by adding to enabled port hashlist and setting
945 * port->index (Might be racy so reader could see incorrect ifindex when
946 * processing a flying packet, but that is not a problem). Write guarded
947 * by team->lock.
948 */
949 static void team_port_enable(struct team *team,
950 struct team_port *port)
951 {
952 if (team_port_enabled(port))
953 return;
954 port->index = team->en_port_count++;
955 hlist_add_head_rcu(&port->hlist,
956 team_port_index_hash(team, port->index));
957 team_adjust_ops(team);
958 team_queue_override_port_add(team, port);
959 if (team->ops.port_enabled)
960 team->ops.port_enabled(team, port);
961 team_notify_peers(team);
962 team_mcast_rejoin(team);
963 team_lower_state_changed(port);
964 }
965
966 static void __reconstruct_port_hlist(struct team *team, int rm_index)
967 {
968 int i;
969 struct team_port *port;
970
971 for (i = rm_index + 1; i < team->en_port_count; i++) {
972 port = team_get_port_by_index(team, i);
973 hlist_del_rcu(&port->hlist);
974 port->index--;
975 hlist_add_head_rcu(&port->hlist,
976 team_port_index_hash(team, port->index));
977 }
978 }
979
980 static void team_port_disable(struct team *team,
981 struct team_port *port)
982 {
983 if (!team_port_enabled(port))
984 return;
985 if (team->ops.port_disabled)
986 team->ops.port_disabled(team, port);
987 hlist_del_rcu(&port->hlist);
988 __reconstruct_port_hlist(team, port->index);
989 port->index = -1;
990 team->en_port_count--;
991 team_queue_override_port_del(team, port);
992 team_adjust_ops(team);
993 team_notify_peers(team);
994 team_mcast_rejoin(team);
995 team_lower_state_changed(port);
996 }
997
998 #define TEAM_VLAN_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
999 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
1000 NETIF_F_HIGHDMA | NETIF_F_LRO)
1001
1002 #define TEAM_ENC_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
1003 NETIF_F_RXCSUM | NETIF_F_ALL_TSO)
1004
1005 static void __team_compute_features(struct team *team)
1006 {
1007 struct team_port *port;
1008 netdev_features_t vlan_features = TEAM_VLAN_FEATURES &
1009 NETIF_F_ALL_FOR_ALL;
1010 netdev_features_t enc_features = TEAM_ENC_FEATURES;
1011 unsigned short max_hard_header_len = ETH_HLEN;
1012 unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE |
1013 IFF_XMIT_DST_RELEASE_PERM;
1014
1015 list_for_each_entry(port, &team->port_list, list) {
1016 vlan_features = netdev_increment_features(vlan_features,
1017 port->dev->vlan_features,
1018 TEAM_VLAN_FEATURES);
1019 enc_features =
1020 netdev_increment_features(enc_features,
1021 port->dev->hw_enc_features,
1022 TEAM_ENC_FEATURES);
1023
1024
1025 dst_release_flag &= port->dev->priv_flags;
1026 if (port->dev->hard_header_len > max_hard_header_len)
1027 max_hard_header_len = port->dev->hard_header_len;
1028 }
1029
1030 team->dev->vlan_features = vlan_features;
1031 team->dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL |
1032 NETIF_F_GSO_UDP_L4;
1033 team->dev->hard_header_len = max_hard_header_len;
1034
1035 team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
1036 if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
1037 team->dev->priv_flags |= IFF_XMIT_DST_RELEASE;
1038 }
1039
1040 static void team_compute_features(struct team *team)
1041 {
1042 mutex_lock(&team->lock);
1043 __team_compute_features(team);
1044 mutex_unlock(&team->lock);
1045 netdev_change_features(team->dev);
1046 }
1047
1048 static int team_port_enter(struct team *team, struct team_port *port)
1049 {
1050 int err = 0;
1051
1052 dev_hold(team->dev);
1053 if (team->ops.port_enter) {
1054 err = team->ops.port_enter(team, port);
1055 if (err) {
1056 netdev_err(team->dev, "Device %s failed to enter team mode\n",
1057 port->dev->name);
1058 goto err_port_enter;
1059 }
1060 }
1061
1062 return 0;
1063
1064 err_port_enter:
1065 dev_put(team->dev);
1066
1067 return err;
1068 }
1069
1070 static void team_port_leave(struct team *team, struct team_port *port)
1071 {
1072 if (team->ops.port_leave)
1073 team->ops.port_leave(team, port);
1074 dev_put(team->dev);
1075 }
1076
1077 #ifdef CONFIG_NET_POLL_CONTROLLER
1078 static int __team_port_enable_netpoll(struct team_port *port)
1079 {
1080 struct netpoll *np;
1081 int err;
1082
1083 np = kzalloc(sizeof(*np), GFP_KERNEL);
1084 if (!np)
1085 return -ENOMEM;
1086
1087 err = __netpoll_setup(np, port->dev);
1088 if (err) {
1089 kfree(np);
1090 return err;
1091 }
1092 port->np = np;
1093 return err;
1094 }
1095
1096 static int team_port_enable_netpoll(struct team_port *port)
1097 {
1098 if (!port->team->dev->npinfo)
1099 return 0;
1100
1101 return __team_port_enable_netpoll(port);
1102 }
1103
1104 static void team_port_disable_netpoll(struct team_port *port)
1105 {
1106 struct netpoll *np = port->np;
1107
1108 if (!np)
1109 return;
1110 port->np = NULL;
1111
1112 /* Wait for transmitting packets to finish before freeing. */
1113 synchronize_rcu_bh();
1114 __netpoll_cleanup(np);
1115 kfree(np);
1116 }
1117 #else
1118 static int team_port_enable_netpoll(struct team_port *port)
1119 {
1120 return 0;
1121 }
1122 static void team_port_disable_netpoll(struct team_port *port)
1123 {
1124 }
1125 #endif
1126
1127 static int team_upper_dev_link(struct team *team, struct team_port *port,
1128 struct netlink_ext_ack *extack)
1129 {
1130 struct netdev_lag_upper_info lag_upper_info;
1131 int err;
1132
1133 lag_upper_info.tx_type = team->mode->lag_tx_type;
1134 lag_upper_info.hash_type = NETDEV_LAG_HASH_UNKNOWN;
1135 err = netdev_master_upper_dev_link(port->dev, team->dev, NULL,
1136 &lag_upper_info, extack);
1137 if (err)
1138 return err;
1139 port->dev->priv_flags |= IFF_TEAM_PORT;
1140 return 0;
1141 }
1142
1143 static void team_upper_dev_unlink(struct team *team, struct team_port *port)
1144 {
1145 netdev_upper_dev_unlink(port->dev, team->dev);
1146 port->dev->priv_flags &= ~IFF_TEAM_PORT;
1147 }
1148
1149 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1150 static int team_dev_type_check_change(struct net_device *dev,
1151 struct net_device *port_dev);
1152
1153 static int team_port_add(struct team *team, struct net_device *port_dev,
1154 struct netlink_ext_ack *extack)
1155 {
1156 struct net_device *dev = team->dev;
1157 struct team_port *port;
1158 char *portname = port_dev->name;
1159 int err;
1160
1161 if (port_dev->flags & IFF_LOOPBACK) {
1162 NL_SET_ERR_MSG(extack, "Loopback device can't be added as a team port");
1163 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1164 portname);
1165 return -EINVAL;
1166 }
1167
1168 if (team_port_exists(port_dev)) {
1169 NL_SET_ERR_MSG(extack, "Device is already a port of a team device");
1170 netdev_err(dev, "Device %s is already a port "
1171 "of a team device\n", portname);
1172 return -EBUSY;
1173 }
1174
1175 if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1176 vlan_uses_dev(dev)) {
1177 NL_SET_ERR_MSG(extack, "Device is VLAN challenged and team device has VLAN set up");
1178 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1179 portname);
1180 return -EPERM;
1181 }
1182
1183 err = team_dev_type_check_change(dev, port_dev);
1184 if (err)
1185 return err;
1186
1187 if (port_dev->flags & IFF_UP) {
1188 NL_SET_ERR_MSG(extack, "Device is up. Set it down before adding it as a team port");
1189 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1190 portname);
1191 return -EBUSY;
1192 }
1193
1194 port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1195 GFP_KERNEL);
1196 if (!port)
1197 return -ENOMEM;
1198
1199 port->dev = port_dev;
1200 port->team = team;
1201 INIT_LIST_HEAD(&port->qom_list);
1202
1203 port->orig.mtu = port_dev->mtu;
1204 err = dev_set_mtu(port_dev, dev->mtu);
1205 if (err) {
1206 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1207 goto err_set_mtu;
1208 }
1209
1210 memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1211
1212 err = team_port_enter(team, port);
1213 if (err) {
1214 netdev_err(dev, "Device %s failed to enter team mode\n",
1215 portname);
1216 goto err_port_enter;
1217 }
1218
1219 err = dev_open(port_dev);
1220 if (err) {
1221 netdev_dbg(dev, "Device %s opening failed\n",
1222 portname);
1223 goto err_dev_open;
1224 }
1225
1226 err = vlan_vids_add_by_dev(port_dev, dev);
1227 if (err) {
1228 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1229 portname);
1230 goto err_vids_add;
1231 }
1232
1233 err = team_port_enable_netpoll(port);
1234 if (err) {
1235 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1236 portname);
1237 goto err_enable_netpoll;
1238 }
1239
1240 if (!(dev->features & NETIF_F_LRO))
1241 dev_disable_lro(port_dev);
1242
1243 err = netdev_rx_handler_register(port_dev, team_handle_frame,
1244 port);
1245 if (err) {
1246 netdev_err(dev, "Device %s failed to register rx_handler\n",
1247 portname);
1248 goto err_handler_register;
1249 }
1250
1251 err = team_upper_dev_link(team, port, extack);
1252 if (err) {
1253 netdev_err(dev, "Device %s failed to set upper link\n",
1254 portname);
1255 goto err_set_upper_link;
1256 }
1257
1258 err = __team_option_inst_add_port(team, port);
1259 if (err) {
1260 netdev_err(dev, "Device %s failed to add per-port options\n",
1261 portname);
1262 goto err_option_port_add;
1263 }
1264
1265 netif_addr_lock_bh(dev);
1266 dev_uc_sync_multiple(port_dev, dev);
1267 dev_mc_sync_multiple(port_dev, dev);
1268 netif_addr_unlock_bh(dev);
1269
1270 port->index = -1;
1271 list_add_tail_rcu(&port->list, &team->port_list);
1272 team_port_enable(team, port);
1273 __team_compute_features(team);
1274 __team_port_change_port_added(port, !!netif_carrier_ok(port_dev));
1275 __team_options_change_check(team);
1276
1277 netdev_info(dev, "Port device %s added\n", portname);
1278
1279 return 0;
1280
1281 err_option_port_add:
1282 team_upper_dev_unlink(team, port);
1283
1284 err_set_upper_link:
1285 netdev_rx_handler_unregister(port_dev);
1286
1287 err_handler_register:
1288 team_port_disable_netpoll(port);
1289
1290 err_enable_netpoll:
1291 vlan_vids_del_by_dev(port_dev, dev);
1292
1293 err_vids_add:
1294 dev_close(port_dev);
1295
1296 err_dev_open:
1297 team_port_leave(team, port);
1298 team_port_set_orig_dev_addr(port);
1299
1300 err_port_enter:
1301 dev_set_mtu(port_dev, port->orig.mtu);
1302
1303 err_set_mtu:
1304 kfree(port);
1305
1306 return err;
1307 }
1308
1309 static void __team_port_change_port_removed(struct team_port *port);
1310
1311 static int team_port_del(struct team *team, struct net_device *port_dev)
1312 {
1313 struct net_device *dev = team->dev;
1314 struct team_port *port;
1315 char *portname = port_dev->name;
1316
1317 port = team_port_get_rtnl(port_dev);
1318 if (!port || !team_port_find(team, port)) {
1319 netdev_err(dev, "Device %s does not act as a port of this team\n",
1320 portname);
1321 return -ENOENT;
1322 }
1323
1324 team_port_disable(team, port);
1325 list_del_rcu(&port->list);
1326 team_upper_dev_unlink(team, port);
1327 netdev_rx_handler_unregister(port_dev);
1328 team_port_disable_netpoll(port);
1329 vlan_vids_del_by_dev(port_dev, dev);
1330 dev_uc_unsync(port_dev, dev);
1331 dev_mc_unsync(port_dev, dev);
1332 dev_close(port_dev);
1333 team_port_leave(team, port);
1334
1335 __team_option_inst_mark_removed_port(team, port);
1336 __team_options_change_check(team);
1337 __team_option_inst_del_port(team, port);
1338 __team_port_change_port_removed(port);
1339
1340 team_port_set_orig_dev_addr(port);
1341 dev_set_mtu(port_dev, port->orig.mtu);
1342 kfree_rcu(port, rcu);
1343 netdev_info(dev, "Port device %s removed\n", portname);
1344 __team_compute_features(team);
1345
1346 return 0;
1347 }
1348
1349
1350 /*****************
1351 * Net device ops
1352 *****************/
1353
1354 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1355 {
1356 ctx->data.str_val = team->mode->kind;
1357 return 0;
1358 }
1359
1360 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1361 {
1362 return team_change_mode(team, ctx->data.str_val);
1363 }
1364
1365 static int team_notify_peers_count_get(struct team *team,
1366 struct team_gsetter_ctx *ctx)
1367 {
1368 ctx->data.u32_val = team->notify_peers.count;
1369 return 0;
1370 }
1371
1372 static int team_notify_peers_count_set(struct team *team,
1373 struct team_gsetter_ctx *ctx)
1374 {
1375 team->notify_peers.count = ctx->data.u32_val;
1376 return 0;
1377 }
1378
1379 static int team_notify_peers_interval_get(struct team *team,
1380 struct team_gsetter_ctx *ctx)
1381 {
1382 ctx->data.u32_val = team->notify_peers.interval;
1383 return 0;
1384 }
1385
1386 static int team_notify_peers_interval_set(struct team *team,
1387 struct team_gsetter_ctx *ctx)
1388 {
1389 team->notify_peers.interval = ctx->data.u32_val;
1390 return 0;
1391 }
1392
1393 static int team_mcast_rejoin_count_get(struct team *team,
1394 struct team_gsetter_ctx *ctx)
1395 {
1396 ctx->data.u32_val = team->mcast_rejoin.count;
1397 return 0;
1398 }
1399
1400 static int team_mcast_rejoin_count_set(struct team *team,
1401 struct team_gsetter_ctx *ctx)
1402 {
1403 team->mcast_rejoin.count = ctx->data.u32_val;
1404 return 0;
1405 }
1406
1407 static int team_mcast_rejoin_interval_get(struct team *team,
1408 struct team_gsetter_ctx *ctx)
1409 {
1410 ctx->data.u32_val = team->mcast_rejoin.interval;
1411 return 0;
1412 }
1413
1414 static int team_mcast_rejoin_interval_set(struct team *team,
1415 struct team_gsetter_ctx *ctx)
1416 {
1417 team->mcast_rejoin.interval = ctx->data.u32_val;
1418 return 0;
1419 }
1420
1421 static int team_port_en_option_get(struct team *team,
1422 struct team_gsetter_ctx *ctx)
1423 {
1424 struct team_port *port = ctx->info->port;
1425
1426 ctx->data.bool_val = team_port_enabled(port);
1427 return 0;
1428 }
1429
1430 static int team_port_en_option_set(struct team *team,
1431 struct team_gsetter_ctx *ctx)
1432 {
1433 struct team_port *port = ctx->info->port;
1434
1435 if (ctx->data.bool_val)
1436 team_port_enable(team, port);
1437 else
1438 team_port_disable(team, port);
1439 return 0;
1440 }
1441
1442 static int team_user_linkup_option_get(struct team *team,
1443 struct team_gsetter_ctx *ctx)
1444 {
1445 struct team_port *port = ctx->info->port;
1446
1447 ctx->data.bool_val = port->user.linkup;
1448 return 0;
1449 }
1450
1451 static void __team_carrier_check(struct team *team);
1452
1453 static int team_user_linkup_option_set(struct team *team,
1454 struct team_gsetter_ctx *ctx)
1455 {
1456 struct team_port *port = ctx->info->port;
1457
1458 port->user.linkup = ctx->data.bool_val;
1459 team_refresh_port_linkup(port);
1460 __team_carrier_check(port->team);
1461 return 0;
1462 }
1463
1464 static int team_user_linkup_en_option_get(struct team *team,
1465 struct team_gsetter_ctx *ctx)
1466 {
1467 struct team_port *port = ctx->info->port;
1468
1469 ctx->data.bool_val = port->user.linkup_enabled;
1470 return 0;
1471 }
1472
1473 static int team_user_linkup_en_option_set(struct team *team,
1474 struct team_gsetter_ctx *ctx)
1475 {
1476 struct team_port *port = ctx->info->port;
1477
1478 port->user.linkup_enabled = ctx->data.bool_val;
1479 team_refresh_port_linkup(port);
1480 __team_carrier_check(port->team);
1481 return 0;
1482 }
1483
1484 static int team_priority_option_get(struct team *team,
1485 struct team_gsetter_ctx *ctx)
1486 {
1487 struct team_port *port = ctx->info->port;
1488
1489 ctx->data.s32_val = port->priority;
1490 return 0;
1491 }
1492
1493 static int team_priority_option_set(struct team *team,
1494 struct team_gsetter_ctx *ctx)
1495 {
1496 struct team_port *port = ctx->info->port;
1497 s32 priority = ctx->data.s32_val;
1498
1499 if (port->priority == priority)
1500 return 0;
1501 port->priority = priority;
1502 team_queue_override_port_prio_changed(team, port);
1503 return 0;
1504 }
1505
1506 static int team_queue_id_option_get(struct team *team,
1507 struct team_gsetter_ctx *ctx)
1508 {
1509 struct team_port *port = ctx->info->port;
1510
1511 ctx->data.u32_val = port->queue_id;
1512 return 0;
1513 }
1514
1515 static int team_queue_id_option_set(struct team *team,
1516 struct team_gsetter_ctx *ctx)
1517 {
1518 struct team_port *port = ctx->info->port;
1519 u16 new_queue_id = ctx->data.u32_val;
1520
1521 if (port->queue_id == new_queue_id)
1522 return 0;
1523 if (new_queue_id >= team->dev->real_num_tx_queues)
1524 return -EINVAL;
1525 team_queue_override_port_change_queue_id(team, port, new_queue_id);
1526 return 0;
1527 }
1528
1529 static const struct team_option team_options[] = {
1530 {
1531 .name = "mode",
1532 .type = TEAM_OPTION_TYPE_STRING,
1533 .getter = team_mode_option_get,
1534 .setter = team_mode_option_set,
1535 },
1536 {
1537 .name = "notify_peers_count",
1538 .type = TEAM_OPTION_TYPE_U32,
1539 .getter = team_notify_peers_count_get,
1540 .setter = team_notify_peers_count_set,
1541 },
1542 {
1543 .name = "notify_peers_interval",
1544 .type = TEAM_OPTION_TYPE_U32,
1545 .getter = team_notify_peers_interval_get,
1546 .setter = team_notify_peers_interval_set,
1547 },
1548 {
1549 .name = "mcast_rejoin_count",
1550 .type = TEAM_OPTION_TYPE_U32,
1551 .getter = team_mcast_rejoin_count_get,
1552 .setter = team_mcast_rejoin_count_set,
1553 },
1554 {
1555 .name = "mcast_rejoin_interval",
1556 .type = TEAM_OPTION_TYPE_U32,
1557 .getter = team_mcast_rejoin_interval_get,
1558 .setter = team_mcast_rejoin_interval_set,
1559 },
1560 {
1561 .name = "enabled",
1562 .type = TEAM_OPTION_TYPE_BOOL,
1563 .per_port = true,
1564 .getter = team_port_en_option_get,
1565 .setter = team_port_en_option_set,
1566 },
1567 {
1568 .name = "user_linkup",
1569 .type = TEAM_OPTION_TYPE_BOOL,
1570 .per_port = true,
1571 .getter = team_user_linkup_option_get,
1572 .setter = team_user_linkup_option_set,
1573 },
1574 {
1575 .name = "user_linkup_enabled",
1576 .type = TEAM_OPTION_TYPE_BOOL,
1577 .per_port = true,
1578 .getter = team_user_linkup_en_option_get,
1579 .setter = team_user_linkup_en_option_set,
1580 },
1581 {
1582 .name = "priority",
1583 .type = TEAM_OPTION_TYPE_S32,
1584 .per_port = true,
1585 .getter = team_priority_option_get,
1586 .setter = team_priority_option_set,
1587 },
1588 {
1589 .name = "queue_id",
1590 .type = TEAM_OPTION_TYPE_U32,
1591 .per_port = true,
1592 .getter = team_queue_id_option_get,
1593 .setter = team_queue_id_option_set,
1594 },
1595 };
1596
1597
1598 static int team_init(struct net_device *dev)
1599 {
1600 struct team *team = netdev_priv(dev);
1601 int i;
1602 int err;
1603
1604 team->dev = dev;
1605 mutex_init(&team->lock);
1606 team_set_no_mode(team);
1607
1608 team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1609 if (!team->pcpu_stats)
1610 return -ENOMEM;
1611
1612 for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1613 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1614 INIT_LIST_HEAD(&team->port_list);
1615 err = team_queue_override_init(team);
1616 if (err)
1617 goto err_team_queue_override_init;
1618
1619 team_adjust_ops(team);
1620
1621 INIT_LIST_HEAD(&team->option_list);
1622 INIT_LIST_HEAD(&team->option_inst_list);
1623
1624 team_notify_peers_init(team);
1625 team_mcast_rejoin_init(team);
1626
1627 err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1628 if (err)
1629 goto err_options_register;
1630 netif_carrier_off(dev);
1631
1632 netdev_lockdep_set_classes(dev);
1633
1634 return 0;
1635
1636 err_options_register:
1637 team_mcast_rejoin_fini(team);
1638 team_notify_peers_fini(team);
1639 team_queue_override_fini(team);
1640 err_team_queue_override_init:
1641 free_percpu(team->pcpu_stats);
1642
1643 return err;
1644 }
1645
1646 static void team_uninit(struct net_device *dev)
1647 {
1648 struct team *team = netdev_priv(dev);
1649 struct team_port *port;
1650 struct team_port *tmp;
1651
1652 mutex_lock(&team->lock);
1653 list_for_each_entry_safe(port, tmp, &team->port_list, list)
1654 team_port_del(team, port->dev);
1655
1656 __team_change_mode(team, NULL); /* cleanup */
1657 __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1658 team_mcast_rejoin_fini(team);
1659 team_notify_peers_fini(team);
1660 team_queue_override_fini(team);
1661 mutex_unlock(&team->lock);
1662 netdev_change_features(dev);
1663 }
1664
1665 static void team_destructor(struct net_device *dev)
1666 {
1667 struct team *team = netdev_priv(dev);
1668
1669 free_percpu(team->pcpu_stats);
1670 }
1671
1672 static int team_open(struct net_device *dev)
1673 {
1674 return 0;
1675 }
1676
1677 static int team_close(struct net_device *dev)
1678 {
1679 return 0;
1680 }
1681
1682 /*
1683 * note: already called with rcu_read_lock
1684 */
1685 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1686 {
1687 struct team *team = netdev_priv(dev);
1688 bool tx_success;
1689 unsigned int len = skb->len;
1690
1691 tx_success = team_queue_override_transmit(team, skb);
1692 if (!tx_success)
1693 tx_success = team->ops.transmit(team, skb);
1694 if (tx_success) {
1695 struct team_pcpu_stats *pcpu_stats;
1696
1697 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1698 u64_stats_update_begin(&pcpu_stats->syncp);
1699 pcpu_stats->tx_packets++;
1700 pcpu_stats->tx_bytes += len;
1701 u64_stats_update_end(&pcpu_stats->syncp);
1702 } else {
1703 this_cpu_inc(team->pcpu_stats->tx_dropped);
1704 }
1705
1706 return NETDEV_TX_OK;
1707 }
1708
1709 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1710 void *accel_priv, select_queue_fallback_t fallback)
1711 {
1712 /*
1713 * This helper function exists to help dev_pick_tx get the correct
1714 * destination queue. Using a helper function skips a call to
1715 * skb_tx_hash and will put the skbs in the queue we expect on their
1716 * way down to the team driver.
1717 */
1718 u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1719
1720 /*
1721 * Save the original txq to restore before passing to the driver
1722 */
1723 qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1724
1725 if (unlikely(txq >= dev->real_num_tx_queues)) {
1726 do {
1727 txq -= dev->real_num_tx_queues;
1728 } while (txq >= dev->real_num_tx_queues);
1729 }
1730 return txq;
1731 }
1732
1733 static void team_change_rx_flags(struct net_device *dev, int change)
1734 {
1735 struct team *team = netdev_priv(dev);
1736 struct team_port *port;
1737 int inc;
1738
1739 rcu_read_lock();
1740 list_for_each_entry_rcu(port, &team->port_list, list) {
1741 if (change & IFF_PROMISC) {
1742 inc = dev->flags & IFF_PROMISC ? 1 : -1;
1743 dev_set_promiscuity(port->dev, inc);
1744 }
1745 if (change & IFF_ALLMULTI) {
1746 inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1747 dev_set_allmulti(port->dev, inc);
1748 }
1749 }
1750 rcu_read_unlock();
1751 }
1752
1753 static void team_set_rx_mode(struct net_device *dev)
1754 {
1755 struct team *team = netdev_priv(dev);
1756 struct team_port *port;
1757
1758 rcu_read_lock();
1759 list_for_each_entry_rcu(port, &team->port_list, list) {
1760 dev_uc_sync_multiple(port->dev, dev);
1761 dev_mc_sync_multiple(port->dev, dev);
1762 }
1763 rcu_read_unlock();
1764 }
1765
1766 static int team_set_mac_address(struct net_device *dev, void *p)
1767 {
1768 struct sockaddr *addr = p;
1769 struct team *team = netdev_priv(dev);
1770 struct team_port *port;
1771
1772 if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1773 return -EADDRNOTAVAIL;
1774 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1775 mutex_lock(&team->lock);
1776 list_for_each_entry(port, &team->port_list, list)
1777 if (team->ops.port_change_dev_addr)
1778 team->ops.port_change_dev_addr(team, port);
1779 mutex_unlock(&team->lock);
1780 return 0;
1781 }
1782
1783 static int team_change_mtu(struct net_device *dev, int new_mtu)
1784 {
1785 struct team *team = netdev_priv(dev);
1786 struct team_port *port;
1787 int err;
1788
1789 /*
1790 * Alhough this is reader, it's guarded by team lock. It's not possible
1791 * to traverse list in reverse under rcu_read_lock
1792 */
1793 mutex_lock(&team->lock);
1794 team->port_mtu_change_allowed = true;
1795 list_for_each_entry(port, &team->port_list, list) {
1796 err = dev_set_mtu(port->dev, new_mtu);
1797 if (err) {
1798 netdev_err(dev, "Device %s failed to change mtu",
1799 port->dev->name);
1800 goto unwind;
1801 }
1802 }
1803 team->port_mtu_change_allowed = false;
1804 mutex_unlock(&team->lock);
1805
1806 dev->mtu = new_mtu;
1807
1808 return 0;
1809
1810 unwind:
1811 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1812 dev_set_mtu(port->dev, dev->mtu);
1813 team->port_mtu_change_allowed = false;
1814 mutex_unlock(&team->lock);
1815
1816 return err;
1817 }
1818
1819 static void
1820 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1821 {
1822 struct team *team = netdev_priv(dev);
1823 struct team_pcpu_stats *p;
1824 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1825 u32 rx_dropped = 0, tx_dropped = 0, rx_nohandler = 0;
1826 unsigned int start;
1827 int i;
1828
1829 for_each_possible_cpu(i) {
1830 p = per_cpu_ptr(team->pcpu_stats, i);
1831 do {
1832 start = u64_stats_fetch_begin_irq(&p->syncp);
1833 rx_packets = p->rx_packets;
1834 rx_bytes = p->rx_bytes;
1835 rx_multicast = p->rx_multicast;
1836 tx_packets = p->tx_packets;
1837 tx_bytes = p->tx_bytes;
1838 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
1839
1840 stats->rx_packets += rx_packets;
1841 stats->rx_bytes += rx_bytes;
1842 stats->multicast += rx_multicast;
1843 stats->tx_packets += tx_packets;
1844 stats->tx_bytes += tx_bytes;
1845 /*
1846 * rx_dropped, tx_dropped & rx_nohandler are u32,
1847 * updated without syncp protection.
1848 */
1849 rx_dropped += p->rx_dropped;
1850 tx_dropped += p->tx_dropped;
1851 rx_nohandler += p->rx_nohandler;
1852 }
1853 stats->rx_dropped = rx_dropped;
1854 stats->tx_dropped = tx_dropped;
1855 stats->rx_nohandler = rx_nohandler;
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(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 struct netlink_ext_ack *extack)
1943 {
1944 struct team *team = netdev_priv(dev);
1945 int err;
1946
1947 mutex_lock(&team->lock);
1948 err = team_port_add(team, port_dev, extack);
1949 mutex_unlock(&team->lock);
1950
1951 if (!err)
1952 netdev_change_features(dev);
1953
1954 return err;
1955 }
1956
1957 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1958 {
1959 struct team *team = netdev_priv(dev);
1960 int err;
1961
1962 mutex_lock(&team->lock);
1963 err = team_port_del(team, port_dev);
1964 mutex_unlock(&team->lock);
1965
1966 if (!err)
1967 netdev_change_features(dev);
1968
1969 return err;
1970 }
1971
1972 static netdev_features_t team_fix_features(struct net_device *dev,
1973 netdev_features_t features)
1974 {
1975 struct team_port *port;
1976 struct team *team = netdev_priv(dev);
1977 netdev_features_t mask;
1978
1979 mask = features;
1980 features &= ~NETIF_F_ONE_FOR_ALL;
1981 features |= NETIF_F_ALL_FOR_ALL;
1982
1983 rcu_read_lock();
1984 list_for_each_entry_rcu(port, &team->port_list, list) {
1985 features = netdev_increment_features(features,
1986 port->dev->features,
1987 mask);
1988 }
1989 rcu_read_unlock();
1990
1991 features = netdev_add_tso_features(features, mask);
1992
1993 return features;
1994 }
1995
1996 static int team_change_carrier(struct net_device *dev, bool new_carrier)
1997 {
1998 struct team *team = netdev_priv(dev);
1999
2000 team->user_carrier_enabled = true;
2001
2002 if (new_carrier)
2003 netif_carrier_on(dev);
2004 else
2005 netif_carrier_off(dev);
2006 return 0;
2007 }
2008
2009 static const struct net_device_ops team_netdev_ops = {
2010 .ndo_init = team_init,
2011 .ndo_uninit = team_uninit,
2012 .ndo_open = team_open,
2013 .ndo_stop = team_close,
2014 .ndo_start_xmit = team_xmit,
2015 .ndo_select_queue = team_select_queue,
2016 .ndo_change_rx_flags = team_change_rx_flags,
2017 .ndo_set_rx_mode = team_set_rx_mode,
2018 .ndo_set_mac_address = team_set_mac_address,
2019 .ndo_change_mtu = team_change_mtu,
2020 .ndo_get_stats64 = team_get_stats64,
2021 .ndo_vlan_rx_add_vid = team_vlan_rx_add_vid,
2022 .ndo_vlan_rx_kill_vid = team_vlan_rx_kill_vid,
2023 #ifdef CONFIG_NET_POLL_CONTROLLER
2024 .ndo_poll_controller = team_poll_controller,
2025 .ndo_netpoll_setup = team_netpoll_setup,
2026 .ndo_netpoll_cleanup = team_netpoll_cleanup,
2027 #endif
2028 .ndo_add_slave = team_add_slave,
2029 .ndo_del_slave = team_del_slave,
2030 .ndo_fix_features = team_fix_features,
2031 .ndo_change_carrier = team_change_carrier,
2032 .ndo_features_check = passthru_features_check,
2033 };
2034
2035 /***********************
2036 * ethtool interface
2037 ***********************/
2038
2039 static void team_ethtool_get_drvinfo(struct net_device *dev,
2040 struct ethtool_drvinfo *drvinfo)
2041 {
2042 strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
2043 strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2044 }
2045
2046 static const struct ethtool_ops team_ethtool_ops = {
2047 .get_drvinfo = team_ethtool_get_drvinfo,
2048 .get_link = ethtool_op_get_link,
2049 };
2050
2051 /***********************
2052 * rt netlink interface
2053 ***********************/
2054
2055 static void team_setup_by_port(struct net_device *dev,
2056 struct net_device *port_dev)
2057 {
2058 dev->header_ops = port_dev->header_ops;
2059 dev->type = port_dev->type;
2060 dev->hard_header_len = port_dev->hard_header_len;
2061 dev->addr_len = port_dev->addr_len;
2062 dev->mtu = port_dev->mtu;
2063 memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2064 eth_hw_addr_inherit(dev, port_dev);
2065 }
2066
2067 static int team_dev_type_check_change(struct net_device *dev,
2068 struct net_device *port_dev)
2069 {
2070 struct team *team = netdev_priv(dev);
2071 char *portname = port_dev->name;
2072 int err;
2073
2074 if (dev->type == port_dev->type)
2075 return 0;
2076 if (!list_empty(&team->port_list)) {
2077 netdev_err(dev, "Device %s is of different type\n", portname);
2078 return -EBUSY;
2079 }
2080 err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2081 err = notifier_to_errno(err);
2082 if (err) {
2083 netdev_err(dev, "Refused to change device type\n");
2084 return err;
2085 }
2086 dev_uc_flush(dev);
2087 dev_mc_flush(dev);
2088 team_setup_by_port(dev, port_dev);
2089 call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2090 return 0;
2091 }
2092
2093 static void team_setup(struct net_device *dev)
2094 {
2095 ether_setup(dev);
2096 dev->max_mtu = ETH_MAX_MTU;
2097
2098 dev->netdev_ops = &team_netdev_ops;
2099 dev->ethtool_ops = &team_ethtool_ops;
2100 dev->needs_free_netdev = true;
2101 dev->priv_destructor = team_destructor;
2102 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2103 dev->priv_flags |= IFF_NO_QUEUE;
2104 dev->priv_flags |= IFF_TEAM;
2105
2106 /*
2107 * Indicate we support unicast address filtering. That way core won't
2108 * bring us to promisc mode in case a unicast addr is added.
2109 * Let this up to underlay drivers.
2110 */
2111 dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2112
2113 dev->features |= NETIF_F_LLTX;
2114 dev->features |= NETIF_F_GRO;
2115
2116 /* Don't allow team devices to change network namespaces. */
2117 dev->features |= NETIF_F_NETNS_LOCAL;
2118
2119 dev->hw_features = TEAM_VLAN_FEATURES |
2120 NETIF_F_HW_VLAN_CTAG_TX |
2121 NETIF_F_HW_VLAN_CTAG_RX |
2122 NETIF_F_HW_VLAN_CTAG_FILTER;
2123
2124 dev->hw_features |= NETIF_F_GSO_ENCAP_ALL | NETIF_F_GSO_UDP_L4;
2125 dev->features |= dev->hw_features;
2126 }
2127
2128 static int team_newlink(struct net *src_net, struct net_device *dev,
2129 struct nlattr *tb[], struct nlattr *data[],
2130 struct netlink_ext_ack *extack)
2131 {
2132 if (tb[IFLA_ADDRESS] == NULL)
2133 eth_hw_addr_random(dev);
2134
2135 return register_netdevice(dev);
2136 }
2137
2138 static int team_validate(struct nlattr *tb[], struct nlattr *data[],
2139 struct netlink_ext_ack *extack)
2140 {
2141 if (tb[IFLA_ADDRESS]) {
2142 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2143 return -EINVAL;
2144 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2145 return -EADDRNOTAVAIL;
2146 }
2147 return 0;
2148 }
2149
2150 static unsigned int team_get_num_tx_queues(void)
2151 {
2152 return TEAM_DEFAULT_NUM_TX_QUEUES;
2153 }
2154
2155 static unsigned int team_get_num_rx_queues(void)
2156 {
2157 return TEAM_DEFAULT_NUM_RX_QUEUES;
2158 }
2159
2160 static struct rtnl_link_ops team_link_ops __read_mostly = {
2161 .kind = DRV_NAME,
2162 .priv_size = sizeof(struct team),
2163 .setup = team_setup,
2164 .newlink = team_newlink,
2165 .validate = team_validate,
2166 .get_num_tx_queues = team_get_num_tx_queues,
2167 .get_num_rx_queues = team_get_num_rx_queues,
2168 };
2169
2170
2171 /***********************************
2172 * Generic netlink custom interface
2173 ***********************************/
2174
2175 static struct genl_family team_nl_family;
2176
2177 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2178 [TEAM_ATTR_UNSPEC] = { .type = NLA_UNSPEC, },
2179 [TEAM_ATTR_TEAM_IFINDEX] = { .type = NLA_U32 },
2180 [TEAM_ATTR_LIST_OPTION] = { .type = NLA_NESTED },
2181 [TEAM_ATTR_LIST_PORT] = { .type = NLA_NESTED },
2182 };
2183
2184 static const struct nla_policy
2185 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2186 [TEAM_ATTR_OPTION_UNSPEC] = { .type = NLA_UNSPEC, },
2187 [TEAM_ATTR_OPTION_NAME] = {
2188 .type = NLA_STRING,
2189 .len = TEAM_STRING_MAX_LEN,
2190 },
2191 [TEAM_ATTR_OPTION_CHANGED] = { .type = NLA_FLAG },
2192 [TEAM_ATTR_OPTION_TYPE] = { .type = NLA_U8 },
2193 [TEAM_ATTR_OPTION_DATA] = { .type = NLA_BINARY },
2194 };
2195
2196 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2197 {
2198 struct sk_buff *msg;
2199 void *hdr;
2200 int err;
2201
2202 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2203 if (!msg)
2204 return -ENOMEM;
2205
2206 hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2207 &team_nl_family, 0, TEAM_CMD_NOOP);
2208 if (!hdr) {
2209 err = -EMSGSIZE;
2210 goto err_msg_put;
2211 }
2212
2213 genlmsg_end(msg, hdr);
2214
2215 return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2216
2217 err_msg_put:
2218 nlmsg_free(msg);
2219
2220 return err;
2221 }
2222
2223 /*
2224 * Netlink cmd functions should be locked by following two functions.
2225 * Since dev gets held here, that ensures dev won't disappear in between.
2226 */
2227 static struct team *team_nl_team_get(struct genl_info *info)
2228 {
2229 struct net *net = genl_info_net(info);
2230 int ifindex;
2231 struct net_device *dev;
2232 struct team *team;
2233
2234 if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2235 return NULL;
2236
2237 ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2238 dev = dev_get_by_index(net, ifindex);
2239 if (!dev || dev->netdev_ops != &team_netdev_ops) {
2240 if (dev)
2241 dev_put(dev);
2242 return NULL;
2243 }
2244
2245 team = netdev_priv(dev);
2246 mutex_lock(&team->lock);
2247 return team;
2248 }
2249
2250 static void team_nl_team_put(struct team *team)
2251 {
2252 mutex_unlock(&team->lock);
2253 dev_put(team->dev);
2254 }
2255
2256 typedef int team_nl_send_func_t(struct sk_buff *skb,
2257 struct team *team, u32 portid);
2258
2259 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2260 {
2261 return genlmsg_unicast(dev_net(team->dev), skb, portid);
2262 }
2263
2264 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2265 struct team_option_inst *opt_inst)
2266 {
2267 struct nlattr *option_item;
2268 struct team_option *option = opt_inst->option;
2269 struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2270 struct team_gsetter_ctx ctx;
2271 int err;
2272
2273 ctx.info = opt_inst_info;
2274 err = team_option_get(team, opt_inst, &ctx);
2275 if (err)
2276 return err;
2277
2278 option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
2279 if (!option_item)
2280 return -EMSGSIZE;
2281
2282 if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2283 goto nest_cancel;
2284 if (opt_inst_info->port &&
2285 nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2286 opt_inst_info->port->dev->ifindex))
2287 goto nest_cancel;
2288 if (opt_inst->option->array_size &&
2289 nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2290 opt_inst_info->array_index))
2291 goto nest_cancel;
2292
2293 switch (option->type) {
2294 case TEAM_OPTION_TYPE_U32:
2295 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2296 goto nest_cancel;
2297 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2298 goto nest_cancel;
2299 break;
2300 case TEAM_OPTION_TYPE_STRING:
2301 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2302 goto nest_cancel;
2303 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2304 ctx.data.str_val))
2305 goto nest_cancel;
2306 break;
2307 case TEAM_OPTION_TYPE_BINARY:
2308 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2309 goto nest_cancel;
2310 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2311 ctx.data.bin_val.ptr))
2312 goto nest_cancel;
2313 break;
2314 case TEAM_OPTION_TYPE_BOOL:
2315 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2316 goto nest_cancel;
2317 if (ctx.data.bool_val &&
2318 nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2319 goto nest_cancel;
2320 break;
2321 case TEAM_OPTION_TYPE_S32:
2322 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2323 goto nest_cancel;
2324 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2325 goto nest_cancel;
2326 break;
2327 default:
2328 BUG();
2329 }
2330 if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2331 goto nest_cancel;
2332 if (opt_inst->changed) {
2333 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2334 goto nest_cancel;
2335 opt_inst->changed = false;
2336 }
2337 nla_nest_end(skb, option_item);
2338 return 0;
2339
2340 nest_cancel:
2341 nla_nest_cancel(skb, option_item);
2342 return -EMSGSIZE;
2343 }
2344
2345 static int __send_and_alloc_skb(struct sk_buff **pskb,
2346 struct team *team, u32 portid,
2347 team_nl_send_func_t *send_func)
2348 {
2349 int err;
2350
2351 if (*pskb) {
2352 err = send_func(*pskb, team, portid);
2353 if (err)
2354 return err;
2355 }
2356 *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2357 if (!*pskb)
2358 return -ENOMEM;
2359 return 0;
2360 }
2361
2362 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2363 int flags, team_nl_send_func_t *send_func,
2364 struct list_head *sel_opt_inst_list)
2365 {
2366 struct nlattr *option_list;
2367 struct nlmsghdr *nlh;
2368 void *hdr;
2369 struct team_option_inst *opt_inst;
2370 int err;
2371 struct sk_buff *skb = NULL;
2372 bool incomplete;
2373 int i;
2374
2375 opt_inst = list_first_entry(sel_opt_inst_list,
2376 struct team_option_inst, tmp_list);
2377
2378 start_again:
2379 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2380 if (err)
2381 return err;
2382
2383 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2384 TEAM_CMD_OPTIONS_GET);
2385 if (!hdr) {
2386 nlmsg_free(skb);
2387 return -EMSGSIZE;
2388 }
2389
2390 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2391 goto nla_put_failure;
2392 option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2393 if (!option_list)
2394 goto nla_put_failure;
2395
2396 i = 0;
2397 incomplete = false;
2398 list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2399 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2400 if (err) {
2401 if (err == -EMSGSIZE) {
2402 if (!i)
2403 goto errout;
2404 incomplete = true;
2405 break;
2406 }
2407 goto errout;
2408 }
2409 i++;
2410 }
2411
2412 nla_nest_end(skb, option_list);
2413 genlmsg_end(skb, hdr);
2414 if (incomplete)
2415 goto start_again;
2416
2417 send_done:
2418 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2419 if (!nlh) {
2420 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2421 if (err)
2422 return err;
2423 goto send_done;
2424 }
2425
2426 return send_func(skb, team, portid);
2427
2428 nla_put_failure:
2429 err = -EMSGSIZE;
2430 errout:
2431 nlmsg_free(skb);
2432 return err;
2433 }
2434
2435 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2436 {
2437 struct team *team;
2438 struct team_option_inst *opt_inst;
2439 int err;
2440 LIST_HEAD(sel_opt_inst_list);
2441
2442 team = team_nl_team_get(info);
2443 if (!team)
2444 return -EINVAL;
2445
2446 list_for_each_entry(opt_inst, &team->option_inst_list, list)
2447 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2448 err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2449 NLM_F_ACK, team_nl_send_unicast,
2450 &sel_opt_inst_list);
2451
2452 team_nl_team_put(team);
2453
2454 return err;
2455 }
2456
2457 static int team_nl_send_event_options_get(struct team *team,
2458 struct list_head *sel_opt_inst_list);
2459
2460 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2461 {
2462 struct team *team;
2463 int err = 0;
2464 int i;
2465 struct nlattr *nl_option;
2466 LIST_HEAD(opt_inst_list);
2467
2468 rtnl_lock();
2469
2470 team = team_nl_team_get(info);
2471 if (!team) {
2472 err = -EINVAL;
2473 goto rtnl_unlock;
2474 }
2475
2476 err = -EINVAL;
2477 if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2478 err = -EINVAL;
2479 goto team_put;
2480 }
2481
2482 nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2483 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2484 struct nlattr *attr;
2485 struct nlattr *attr_data;
2486 enum team_option_type opt_type;
2487 int opt_port_ifindex = 0; /* != 0 for per-port options */
2488 u32 opt_array_index = 0;
2489 bool opt_is_array = false;
2490 struct team_option_inst *opt_inst;
2491 char *opt_name;
2492 bool opt_found = false;
2493
2494 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2495 err = -EINVAL;
2496 goto team_put;
2497 }
2498 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2499 nl_option, team_nl_option_policy,
2500 info->extack);
2501 if (err)
2502 goto team_put;
2503 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2504 !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2505 err = -EINVAL;
2506 goto team_put;
2507 }
2508 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2509 case NLA_U32:
2510 opt_type = TEAM_OPTION_TYPE_U32;
2511 break;
2512 case NLA_STRING:
2513 opt_type = TEAM_OPTION_TYPE_STRING;
2514 break;
2515 case NLA_BINARY:
2516 opt_type = TEAM_OPTION_TYPE_BINARY;
2517 break;
2518 case NLA_FLAG:
2519 opt_type = TEAM_OPTION_TYPE_BOOL;
2520 break;
2521 case NLA_S32:
2522 opt_type = TEAM_OPTION_TYPE_S32;
2523 break;
2524 default:
2525 goto team_put;
2526 }
2527
2528 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2529 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2530 err = -EINVAL;
2531 goto team_put;
2532 }
2533
2534 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2535 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2536 if (attr)
2537 opt_port_ifindex = nla_get_u32(attr);
2538
2539 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2540 if (attr) {
2541 opt_is_array = true;
2542 opt_array_index = nla_get_u32(attr);
2543 }
2544
2545 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2546 struct team_option *option = opt_inst->option;
2547 struct team_gsetter_ctx ctx;
2548 struct team_option_inst_info *opt_inst_info;
2549 int tmp_ifindex;
2550
2551 opt_inst_info = &opt_inst->info;
2552 tmp_ifindex = opt_inst_info->port ?
2553 opt_inst_info->port->dev->ifindex : 0;
2554 if (option->type != opt_type ||
2555 strcmp(option->name, opt_name) ||
2556 tmp_ifindex != opt_port_ifindex ||
2557 (option->array_size && !opt_is_array) ||
2558 opt_inst_info->array_index != opt_array_index)
2559 continue;
2560 opt_found = true;
2561 ctx.info = opt_inst_info;
2562 switch (opt_type) {
2563 case TEAM_OPTION_TYPE_U32:
2564 ctx.data.u32_val = nla_get_u32(attr_data);
2565 break;
2566 case TEAM_OPTION_TYPE_STRING:
2567 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2568 err = -EINVAL;
2569 goto team_put;
2570 }
2571 ctx.data.str_val = nla_data(attr_data);
2572 break;
2573 case TEAM_OPTION_TYPE_BINARY:
2574 ctx.data.bin_val.len = nla_len(attr_data);
2575 ctx.data.bin_val.ptr = nla_data(attr_data);
2576 break;
2577 case TEAM_OPTION_TYPE_BOOL:
2578 ctx.data.bool_val = attr_data ? true : false;
2579 break;
2580 case TEAM_OPTION_TYPE_S32:
2581 ctx.data.s32_val = nla_get_s32(attr_data);
2582 break;
2583 default:
2584 BUG();
2585 }
2586 err = team_option_set(team, opt_inst, &ctx);
2587 if (err)
2588 goto team_put;
2589 opt_inst->changed = true;
2590
2591 /* dumb/evil user-space can send us duplicate opt,
2592 * keep only the last one
2593 */
2594 if (__team_option_inst_tmp_find(&opt_inst_list,
2595 opt_inst))
2596 continue;
2597
2598 list_add(&opt_inst->tmp_list, &opt_inst_list);
2599 }
2600 if (!opt_found) {
2601 err = -ENOENT;
2602 goto team_put;
2603 }
2604 }
2605
2606 err = team_nl_send_event_options_get(team, &opt_inst_list);
2607
2608 team_put:
2609 team_nl_team_put(team);
2610 rtnl_unlock:
2611 rtnl_unlock();
2612 return err;
2613 }
2614
2615 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2616 struct team_port *port)
2617 {
2618 struct nlattr *port_item;
2619
2620 port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2621 if (!port_item)
2622 goto nest_cancel;
2623 if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2624 goto nest_cancel;
2625 if (port->changed) {
2626 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2627 goto nest_cancel;
2628 port->changed = false;
2629 }
2630 if ((port->removed &&
2631 nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2632 (port->state.linkup &&
2633 nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2634 nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2635 nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2636 goto nest_cancel;
2637 nla_nest_end(skb, port_item);
2638 return 0;
2639
2640 nest_cancel:
2641 nla_nest_cancel(skb, port_item);
2642 return -EMSGSIZE;
2643 }
2644
2645 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2646 int flags, team_nl_send_func_t *send_func,
2647 struct team_port *one_port)
2648 {
2649 struct nlattr *port_list;
2650 struct nlmsghdr *nlh;
2651 void *hdr;
2652 struct team_port *port;
2653 int err;
2654 struct sk_buff *skb = NULL;
2655 bool incomplete;
2656 int i;
2657
2658 port = list_first_entry_or_null(&team->port_list,
2659 struct team_port, list);
2660
2661 start_again:
2662 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2663 if (err)
2664 return err;
2665
2666 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2667 TEAM_CMD_PORT_LIST_GET);
2668 if (!hdr) {
2669 nlmsg_free(skb);
2670 return -EMSGSIZE;
2671 }
2672
2673 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2674 goto nla_put_failure;
2675 port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2676 if (!port_list)
2677 goto nla_put_failure;
2678
2679 i = 0;
2680 incomplete = false;
2681
2682 /* If one port is selected, called wants to send port list containing
2683 * only this port. Otherwise go through all listed ports and send all
2684 */
2685 if (one_port) {
2686 err = team_nl_fill_one_port_get(skb, one_port);
2687 if (err)
2688 goto errout;
2689 } else if (port) {
2690 list_for_each_entry_from(port, &team->port_list, list) {
2691 err = team_nl_fill_one_port_get(skb, port);
2692 if (err) {
2693 if (err == -EMSGSIZE) {
2694 if (!i)
2695 goto errout;
2696 incomplete = true;
2697 break;
2698 }
2699 goto errout;
2700 }
2701 i++;
2702 }
2703 }
2704
2705 nla_nest_end(skb, port_list);
2706 genlmsg_end(skb, hdr);
2707 if (incomplete)
2708 goto start_again;
2709
2710 send_done:
2711 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2712 if (!nlh) {
2713 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2714 if (err)
2715 return err;
2716 goto send_done;
2717 }
2718
2719 return send_func(skb, team, portid);
2720
2721 nla_put_failure:
2722 err = -EMSGSIZE;
2723 errout:
2724 nlmsg_free(skb);
2725 return err;
2726 }
2727
2728 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2729 struct genl_info *info)
2730 {
2731 struct team *team;
2732 int err;
2733
2734 team = team_nl_team_get(info);
2735 if (!team)
2736 return -EINVAL;
2737
2738 err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2739 NLM_F_ACK, team_nl_send_unicast, NULL);
2740
2741 team_nl_team_put(team);
2742
2743 return err;
2744 }
2745
2746 static const struct genl_ops team_nl_ops[] = {
2747 {
2748 .cmd = TEAM_CMD_NOOP,
2749 .doit = team_nl_cmd_noop,
2750 .policy = team_nl_policy,
2751 },
2752 {
2753 .cmd = TEAM_CMD_OPTIONS_SET,
2754 .doit = team_nl_cmd_options_set,
2755 .policy = team_nl_policy,
2756 .flags = GENL_ADMIN_PERM,
2757 },
2758 {
2759 .cmd = TEAM_CMD_OPTIONS_GET,
2760 .doit = team_nl_cmd_options_get,
2761 .policy = team_nl_policy,
2762 .flags = GENL_ADMIN_PERM,
2763 },
2764 {
2765 .cmd = TEAM_CMD_PORT_LIST_GET,
2766 .doit = team_nl_cmd_port_list_get,
2767 .policy = team_nl_policy,
2768 .flags = GENL_ADMIN_PERM,
2769 },
2770 };
2771
2772 static const struct genl_multicast_group team_nl_mcgrps[] = {
2773 { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2774 };
2775
2776 static struct genl_family team_nl_family __ro_after_init = {
2777 .name = TEAM_GENL_NAME,
2778 .version = TEAM_GENL_VERSION,
2779 .maxattr = TEAM_ATTR_MAX,
2780 .netnsok = true,
2781 .module = THIS_MODULE,
2782 .ops = team_nl_ops,
2783 .n_ops = ARRAY_SIZE(team_nl_ops),
2784 .mcgrps = team_nl_mcgrps,
2785 .n_mcgrps = ARRAY_SIZE(team_nl_mcgrps),
2786 };
2787
2788 static int team_nl_send_multicast(struct sk_buff *skb,
2789 struct team *team, u32 portid)
2790 {
2791 return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2792 skb, 0, 0, GFP_KERNEL);
2793 }
2794
2795 static int team_nl_send_event_options_get(struct team *team,
2796 struct list_head *sel_opt_inst_list)
2797 {
2798 return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2799 sel_opt_inst_list);
2800 }
2801
2802 static int team_nl_send_event_port_get(struct team *team,
2803 struct team_port *port)
2804 {
2805 return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2806 port);
2807 }
2808
2809 static int __init team_nl_init(void)
2810 {
2811 return genl_register_family(&team_nl_family);
2812 }
2813
2814 static void team_nl_fini(void)
2815 {
2816 genl_unregister_family(&team_nl_family);
2817 }
2818
2819
2820 /******************
2821 * Change checkers
2822 ******************/
2823
2824 static void __team_options_change_check(struct team *team)
2825 {
2826 int err;
2827 struct team_option_inst *opt_inst;
2828 LIST_HEAD(sel_opt_inst_list);
2829
2830 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2831 if (opt_inst->changed)
2832 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2833 }
2834 err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2835 if (err && err != -ESRCH)
2836 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2837 err);
2838 }
2839
2840 /* rtnl lock is held */
2841
2842 static void __team_port_change_send(struct team_port *port, bool linkup)
2843 {
2844 int err;
2845
2846 port->changed = true;
2847 port->state.linkup = linkup;
2848 team_refresh_port_linkup(port);
2849 if (linkup) {
2850 struct ethtool_link_ksettings ecmd;
2851
2852 err = __ethtool_get_link_ksettings(port->dev, &ecmd);
2853 if (!err) {
2854 port->state.speed = ecmd.base.speed;
2855 port->state.duplex = ecmd.base.duplex;
2856 goto send_event;
2857 }
2858 }
2859 port->state.speed = 0;
2860 port->state.duplex = 0;
2861
2862 send_event:
2863 err = team_nl_send_event_port_get(port->team, port);
2864 if (err && err != -ESRCH)
2865 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2866 port->dev->name, err);
2867
2868 }
2869
2870 static void __team_carrier_check(struct team *team)
2871 {
2872 struct team_port *port;
2873 bool team_linkup;
2874
2875 if (team->user_carrier_enabled)
2876 return;
2877
2878 team_linkup = false;
2879 list_for_each_entry(port, &team->port_list, list) {
2880 if (port->linkup) {
2881 team_linkup = true;
2882 break;
2883 }
2884 }
2885
2886 if (team_linkup)
2887 netif_carrier_on(team->dev);
2888 else
2889 netif_carrier_off(team->dev);
2890 }
2891
2892 static void __team_port_change_check(struct team_port *port, bool linkup)
2893 {
2894 if (port->state.linkup != linkup)
2895 __team_port_change_send(port, linkup);
2896 __team_carrier_check(port->team);
2897 }
2898
2899 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2900 {
2901 __team_port_change_send(port, linkup);
2902 __team_carrier_check(port->team);
2903 }
2904
2905 static void __team_port_change_port_removed(struct team_port *port)
2906 {
2907 port->removed = true;
2908 __team_port_change_send(port, false);
2909 __team_carrier_check(port->team);
2910 }
2911
2912 static void team_port_change_check(struct team_port *port, bool linkup)
2913 {
2914 struct team *team = port->team;
2915
2916 mutex_lock(&team->lock);
2917 __team_port_change_check(port, linkup);
2918 mutex_unlock(&team->lock);
2919 }
2920
2921
2922 /************************************
2923 * Net device notifier event handler
2924 ************************************/
2925
2926 static int team_device_event(struct notifier_block *unused,
2927 unsigned long event, void *ptr)
2928 {
2929 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2930 struct team_port *port;
2931
2932 port = team_port_get_rtnl(dev);
2933 if (!port)
2934 return NOTIFY_DONE;
2935
2936 switch (event) {
2937 case NETDEV_UP:
2938 if (netif_carrier_ok(dev))
2939 team_port_change_check(port, true);
2940 break;
2941 case NETDEV_DOWN:
2942 team_port_change_check(port, false);
2943 break;
2944 case NETDEV_CHANGE:
2945 if (netif_running(port->dev))
2946 team_port_change_check(port,
2947 !!netif_oper_up(port->dev));
2948 break;
2949 case NETDEV_UNREGISTER:
2950 team_del_slave(port->team->dev, dev);
2951 break;
2952 case NETDEV_FEAT_CHANGE:
2953 team_compute_features(port->team);
2954 break;
2955 case NETDEV_PRECHANGEMTU:
2956 /* Forbid to change mtu of underlaying device */
2957 if (!port->team->port_mtu_change_allowed)
2958 return NOTIFY_BAD;
2959 break;
2960 case NETDEV_PRE_TYPE_CHANGE:
2961 /* Forbid to change type of underlaying device */
2962 return NOTIFY_BAD;
2963 case NETDEV_RESEND_IGMP:
2964 /* Propagate to master device */
2965 call_netdevice_notifiers(event, port->team->dev);
2966 break;
2967 }
2968 return NOTIFY_DONE;
2969 }
2970
2971 static struct notifier_block team_notifier_block __read_mostly = {
2972 .notifier_call = team_device_event,
2973 };
2974
2975
2976 /***********************
2977 * Module init and exit
2978 ***********************/
2979
2980 static int __init team_module_init(void)
2981 {
2982 int err;
2983
2984 register_netdevice_notifier(&team_notifier_block);
2985
2986 err = rtnl_link_register(&team_link_ops);
2987 if (err)
2988 goto err_rtnl_reg;
2989
2990 err = team_nl_init();
2991 if (err)
2992 goto err_nl_init;
2993
2994 return 0;
2995
2996 err_nl_init:
2997 rtnl_link_unregister(&team_link_ops);
2998
2999 err_rtnl_reg:
3000 unregister_netdevice_notifier(&team_notifier_block);
3001
3002 return err;
3003 }
3004
3005 static void __exit team_module_exit(void)
3006 {
3007 team_nl_fini();
3008 rtnl_link_unregister(&team_link_ops);
3009 unregister_netdevice_notifier(&team_notifier_block);
3010 }
3011
3012 module_init(team_module_init);
3013 module_exit(team_module_exit);
3014
3015 MODULE_LICENSE("GPL v2");
3016 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
3017 MODULE_DESCRIPTION("Ethernet team device driver");
3018 MODULE_ALIAS_RTNL_LINK(DRV_NAME);
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