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[mirror_ubuntu-focal-kernel.git] / drivers / net / team / team.c
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * drivers/net/team/team.c - Network team device driver
4 * Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com>
5 */
6
7 #include <linux/kernel.h>
8 #include <linux/types.h>
9 #include <linux/module.h>
10 #include <linux/init.h>
11 #include <linux/slab.h>
12 #include <linux/rcupdate.h>
13 #include <linux/errno.h>
14 #include <linux/ctype.h>
15 #include <linux/notifier.h>
16 #include <linux/netdevice.h>
17 #include <linux/netpoll.h>
18 #include <linux/if_vlan.h>
19 #include <linux/if_arp.h>
20 #include <linux/socket.h>
21 #include <linux/etherdevice.h>
22 #include <linux/rtnetlink.h>
23 #include <net/rtnetlink.h>
24 #include <net/genetlink.h>
25 #include <net/netlink.h>
26 #include <net/sch_generic.h>
27 #include <generated/utsrelease.h>
28 #include <linux/if_team.h>
29
30 #define DRV_NAME "team"
31
32
33 /**********
34 * Helpers
35 **********/
36
37 static struct team_port *team_port_get_rtnl(const struct net_device *dev)
38 {
39 struct team_port *port = rtnl_dereference(dev->rx_handler_data);
40
41 return netif_is_team_port(dev) ? port : NULL;
42 }
43
44 /*
45 * Since the ability to change device address for open port device is tested in
46 * team_port_add, this function can be called without control of return value
47 */
48 static int __set_port_dev_addr(struct net_device *port_dev,
49 const unsigned char *dev_addr)
50 {
51 struct sockaddr_storage addr;
52
53 memcpy(addr.__data, dev_addr, port_dev->addr_len);
54 addr.ss_family = port_dev->type;
55 return dev_set_mac_address(port_dev, (struct sockaddr *)&addr, NULL);
56 }
57
58 static int team_port_set_orig_dev_addr(struct team_port *port)
59 {
60 return __set_port_dev_addr(port->dev, port->orig.dev_addr);
61 }
62
63 static int team_port_set_team_dev_addr(struct team *team,
64 struct team_port *port)
65 {
66 return __set_port_dev_addr(port->dev, team->dev->dev_addr);
67 }
68
69 int team_modeop_port_enter(struct team *team, struct team_port *port)
70 {
71 return team_port_set_team_dev_addr(team, port);
72 }
73 EXPORT_SYMBOL(team_modeop_port_enter);
74
75 void team_modeop_port_change_dev_addr(struct team *team,
76 struct team_port *port)
77 {
78 team_port_set_team_dev_addr(team, port);
79 }
80 EXPORT_SYMBOL(team_modeop_port_change_dev_addr);
81
82 static void team_lower_state_changed(struct team_port *port)
83 {
84 struct netdev_lag_lower_state_info info;
85
86 info.link_up = port->linkup;
87 info.tx_enabled = team_port_enabled(port);
88 netdev_lower_state_changed(port->dev, &info);
89 }
90
91 static void team_refresh_port_linkup(struct team_port *port)
92 {
93 bool new_linkup = port->user.linkup_enabled ? port->user.linkup :
94 port->state.linkup;
95
96 if (port->linkup != new_linkup) {
97 port->linkup = new_linkup;
98 team_lower_state_changed(port);
99 }
100 }
101
102
103 /*******************
104 * Options handling
105 *******************/
106
107 struct team_option_inst { /* One for each option instance */
108 struct list_head list;
109 struct list_head tmp_list;
110 struct team_option *option;
111 struct team_option_inst_info info;
112 bool changed;
113 bool removed;
114 };
115
116 static struct team_option *__team_find_option(struct team *team,
117 const char *opt_name)
118 {
119 struct team_option *option;
120
121 list_for_each_entry(option, &team->option_list, list) {
122 if (strcmp(option->name, opt_name) == 0)
123 return option;
124 }
125 return NULL;
126 }
127
128 static void __team_option_inst_del(struct team_option_inst *opt_inst)
129 {
130 list_del(&opt_inst->list);
131 kfree(opt_inst);
132 }
133
134 static void __team_option_inst_del_option(struct team *team,
135 struct team_option *option)
136 {
137 struct team_option_inst *opt_inst, *tmp;
138
139 list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
140 if (opt_inst->option == option)
141 __team_option_inst_del(opt_inst);
142 }
143 }
144
145 static int __team_option_inst_add(struct team *team, struct team_option *option,
146 struct team_port *port)
147 {
148 struct team_option_inst *opt_inst;
149 unsigned int array_size;
150 unsigned int i;
151 int err;
152
153 array_size = option->array_size;
154 if (!array_size)
155 array_size = 1; /* No array but still need one instance */
156
157 for (i = 0; i < array_size; i++) {
158 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL);
159 if (!opt_inst)
160 return -ENOMEM;
161 opt_inst->option = option;
162 opt_inst->info.port = port;
163 opt_inst->info.array_index = i;
164 opt_inst->changed = true;
165 opt_inst->removed = false;
166 list_add_tail(&opt_inst->list, &team->option_inst_list);
167 if (option->init) {
168 err = option->init(team, &opt_inst->info);
169 if (err)
170 return err;
171 }
172
173 }
174 return 0;
175 }
176
177 static int __team_option_inst_add_option(struct team *team,
178 struct team_option *option)
179 {
180 int err;
181
182 if (!option->per_port) {
183 err = __team_option_inst_add(team, option, NULL);
184 if (err)
185 goto inst_del_option;
186 }
187 return 0;
188
189 inst_del_option:
190 __team_option_inst_del_option(team, option);
191 return err;
192 }
193
194 static void __team_option_inst_mark_removed_option(struct team *team,
195 struct team_option *option)
196 {
197 struct team_option_inst *opt_inst;
198
199 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
200 if (opt_inst->option == option) {
201 opt_inst->changed = true;
202 opt_inst->removed = true;
203 }
204 }
205 }
206
207 static void __team_option_inst_del_port(struct team *team,
208 struct team_port *port)
209 {
210 struct team_option_inst *opt_inst, *tmp;
211
212 list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
213 if (opt_inst->option->per_port &&
214 opt_inst->info.port == port)
215 __team_option_inst_del(opt_inst);
216 }
217 }
218
219 static int __team_option_inst_add_port(struct team *team,
220 struct team_port *port)
221 {
222 struct team_option *option;
223 int err;
224
225 list_for_each_entry(option, &team->option_list, list) {
226 if (!option->per_port)
227 continue;
228 err = __team_option_inst_add(team, option, port);
229 if (err)
230 goto inst_del_port;
231 }
232 return 0;
233
234 inst_del_port:
235 __team_option_inst_del_port(team, port);
236 return err;
237 }
238
239 static void __team_option_inst_mark_removed_port(struct team *team,
240 struct team_port *port)
241 {
242 struct team_option_inst *opt_inst;
243
244 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
245 if (opt_inst->info.port == port) {
246 opt_inst->changed = true;
247 opt_inst->removed = true;
248 }
249 }
250 }
251
252 static int __team_options_register(struct team *team,
253 const struct team_option *option,
254 size_t option_count)
255 {
256 int i;
257 struct team_option **dst_opts;
258 int err;
259
260 dst_opts = kcalloc(option_count, sizeof(struct team_option *),
261 GFP_KERNEL);
262 if (!dst_opts)
263 return -ENOMEM;
264 for (i = 0; i < option_count; i++, option++) {
265 if (__team_find_option(team, option->name)) {
266 err = -EEXIST;
267 goto alloc_rollback;
268 }
269 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
270 if (!dst_opts[i]) {
271 err = -ENOMEM;
272 goto alloc_rollback;
273 }
274 }
275
276 for (i = 0; i < option_count; i++) {
277 err = __team_option_inst_add_option(team, dst_opts[i]);
278 if (err)
279 goto inst_rollback;
280 list_add_tail(&dst_opts[i]->list, &team->option_list);
281 }
282
283 kfree(dst_opts);
284 return 0;
285
286 inst_rollback:
287 for (i--; i >= 0; i--)
288 __team_option_inst_del_option(team, dst_opts[i]);
289
290 i = option_count - 1;
291 alloc_rollback:
292 for (i--; i >= 0; i--)
293 kfree(dst_opts[i]);
294
295 kfree(dst_opts);
296 return err;
297 }
298
299 static void __team_options_mark_removed(struct team *team,
300 const struct team_option *option,
301 size_t option_count)
302 {
303 int i;
304
305 for (i = 0; i < option_count; i++, option++) {
306 struct team_option *del_opt;
307
308 del_opt = __team_find_option(team, option->name);
309 if (del_opt)
310 __team_option_inst_mark_removed_option(team, del_opt);
311 }
312 }
313
314 static void __team_options_unregister(struct team *team,
315 const struct team_option *option,
316 size_t option_count)
317 {
318 int i;
319
320 for (i = 0; i < option_count; i++, option++) {
321 struct team_option *del_opt;
322
323 del_opt = __team_find_option(team, option->name);
324 if (del_opt) {
325 __team_option_inst_del_option(team, del_opt);
326 list_del(&del_opt->list);
327 kfree(del_opt);
328 }
329 }
330 }
331
332 static void __team_options_change_check(struct team *team);
333
334 int team_options_register(struct team *team,
335 const struct team_option *option,
336 size_t option_count)
337 {
338 int err;
339
340 err = __team_options_register(team, option, option_count);
341 if (err)
342 return err;
343 __team_options_change_check(team);
344 return 0;
345 }
346 EXPORT_SYMBOL(team_options_register);
347
348 void team_options_unregister(struct team *team,
349 const struct team_option *option,
350 size_t option_count)
351 {
352 __team_options_mark_removed(team, option, option_count);
353 __team_options_change_check(team);
354 __team_options_unregister(team, option, option_count);
355 }
356 EXPORT_SYMBOL(team_options_unregister);
357
358 static int team_option_get(struct team *team,
359 struct team_option_inst *opt_inst,
360 struct team_gsetter_ctx *ctx)
361 {
362 if (!opt_inst->option->getter)
363 return -EOPNOTSUPP;
364 return opt_inst->option->getter(team, ctx);
365 }
366
367 static int team_option_set(struct team *team,
368 struct team_option_inst *opt_inst,
369 struct team_gsetter_ctx *ctx)
370 {
371 if (!opt_inst->option->setter)
372 return -EOPNOTSUPP;
373 return opt_inst->option->setter(team, ctx);
374 }
375
376 void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info)
377 {
378 struct team_option_inst *opt_inst;
379
380 opt_inst = container_of(opt_inst_info, struct team_option_inst, info);
381 opt_inst->changed = true;
382 }
383 EXPORT_SYMBOL(team_option_inst_set_change);
384
385 void team_options_change_check(struct team *team)
386 {
387 __team_options_change_check(team);
388 }
389 EXPORT_SYMBOL(team_options_change_check);
390
391
392 /****************
393 * Mode handling
394 ****************/
395
396 static LIST_HEAD(mode_list);
397 static DEFINE_SPINLOCK(mode_list_lock);
398
399 struct team_mode_item {
400 struct list_head list;
401 const struct team_mode *mode;
402 };
403
404 static struct team_mode_item *__find_mode(const char *kind)
405 {
406 struct team_mode_item *mitem;
407
408 list_for_each_entry(mitem, &mode_list, list) {
409 if (strcmp(mitem->mode->kind, kind) == 0)
410 return mitem;
411 }
412 return NULL;
413 }
414
415 static bool is_good_mode_name(const char *name)
416 {
417 while (*name != '\0') {
418 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
419 return false;
420 name++;
421 }
422 return true;
423 }
424
425 int team_mode_register(const struct team_mode *mode)
426 {
427 int err = 0;
428 struct team_mode_item *mitem;
429
430 if (!is_good_mode_name(mode->kind) ||
431 mode->priv_size > TEAM_MODE_PRIV_SIZE)
432 return -EINVAL;
433
434 mitem = kmalloc(sizeof(*mitem), GFP_KERNEL);
435 if (!mitem)
436 return -ENOMEM;
437
438 spin_lock(&mode_list_lock);
439 if (__find_mode(mode->kind)) {
440 err = -EEXIST;
441 kfree(mitem);
442 goto unlock;
443 }
444 mitem->mode = mode;
445 list_add_tail(&mitem->list, &mode_list);
446 unlock:
447 spin_unlock(&mode_list_lock);
448 return err;
449 }
450 EXPORT_SYMBOL(team_mode_register);
451
452 void team_mode_unregister(const struct team_mode *mode)
453 {
454 struct team_mode_item *mitem;
455
456 spin_lock(&mode_list_lock);
457 mitem = __find_mode(mode->kind);
458 if (mitem) {
459 list_del_init(&mitem->list);
460 kfree(mitem);
461 }
462 spin_unlock(&mode_list_lock);
463 }
464 EXPORT_SYMBOL(team_mode_unregister);
465
466 static const struct team_mode *team_mode_get(const char *kind)
467 {
468 struct team_mode_item *mitem;
469 const struct team_mode *mode = NULL;
470
471 spin_lock(&mode_list_lock);
472 mitem = __find_mode(kind);
473 if (!mitem) {
474 spin_unlock(&mode_list_lock);
475 request_module("team-mode-%s", kind);
476 spin_lock(&mode_list_lock);
477 mitem = __find_mode(kind);
478 }
479 if (mitem) {
480 mode = mitem->mode;
481 if (!try_module_get(mode->owner))
482 mode = NULL;
483 }
484
485 spin_unlock(&mode_list_lock);
486 return mode;
487 }
488
489 static void team_mode_put(const struct team_mode *mode)
490 {
491 module_put(mode->owner);
492 }
493
494 static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
495 {
496 dev_kfree_skb_any(skb);
497 return false;
498 }
499
500 static rx_handler_result_t team_dummy_receive(struct team *team,
501 struct team_port *port,
502 struct sk_buff *skb)
503 {
504 return RX_HANDLER_ANOTHER;
505 }
506
507 static const struct team_mode __team_no_mode = {
508 .kind = "*NOMODE*",
509 };
510
511 static bool team_is_mode_set(struct team *team)
512 {
513 return team->mode != &__team_no_mode;
514 }
515
516 static void team_set_no_mode(struct team *team)
517 {
518 team->user_carrier_enabled = false;
519 team->mode = &__team_no_mode;
520 }
521
522 static void team_adjust_ops(struct team *team)
523 {
524 /*
525 * To avoid checks in rx/tx skb paths, ensure here that non-null and
526 * correct ops are always set.
527 */
528
529 if (!team->en_port_count || !team_is_mode_set(team) ||
530 !team->mode->ops->transmit)
531 team->ops.transmit = team_dummy_transmit;
532 else
533 team->ops.transmit = team->mode->ops->transmit;
534
535 if (!team->en_port_count || !team_is_mode_set(team) ||
536 !team->mode->ops->receive)
537 team->ops.receive = team_dummy_receive;
538 else
539 team->ops.receive = team->mode->ops->receive;
540 }
541
542 /*
543 * We can benefit from the fact that it's ensured no port is present
544 * at the time of mode change. Therefore no packets are in fly so there's no
545 * need to set mode operations in any special way.
546 */
547 static int __team_change_mode(struct team *team,
548 const struct team_mode *new_mode)
549 {
550 /* Check if mode was previously set and do cleanup if so */
551 if (team_is_mode_set(team)) {
552 void (*exit_op)(struct team *team) = team->ops.exit;
553
554 /* Clear ops area so no callback is called any longer */
555 memset(&team->ops, 0, sizeof(struct team_mode_ops));
556 team_adjust_ops(team);
557
558 if (exit_op)
559 exit_op(team);
560 team_mode_put(team->mode);
561 team_set_no_mode(team);
562 /* zero private data area */
563 memset(&team->mode_priv, 0,
564 sizeof(struct team) - offsetof(struct team, mode_priv));
565 }
566
567 if (!new_mode)
568 return 0;
569
570 if (new_mode->ops->init) {
571 int err;
572
573 err = new_mode->ops->init(team);
574 if (err)
575 return err;
576 }
577
578 team->mode = new_mode;
579 memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
580 team_adjust_ops(team);
581
582 return 0;
583 }
584
585 static int team_change_mode(struct team *team, const char *kind)
586 {
587 const struct team_mode *new_mode;
588 struct net_device *dev = team->dev;
589 int err;
590
591 if (!list_empty(&team->port_list)) {
592 netdev_err(dev, "No ports can be present during mode change\n");
593 return -EBUSY;
594 }
595
596 if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) {
597 netdev_err(dev, "Unable to change to the same mode the team is in\n");
598 return -EINVAL;
599 }
600
601 new_mode = team_mode_get(kind);
602 if (!new_mode) {
603 netdev_err(dev, "Mode \"%s\" not found\n", kind);
604 return -EINVAL;
605 }
606
607 err = __team_change_mode(team, new_mode);
608 if (err) {
609 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
610 team_mode_put(new_mode);
611 return err;
612 }
613
614 netdev_info(dev, "Mode changed to \"%s\"\n", kind);
615 return 0;
616 }
617
618
619 /*********************
620 * Peers notification
621 *********************/
622
623 static void team_notify_peers_work(struct work_struct *work)
624 {
625 struct team *team;
626 int val;
627
628 team = container_of(work, struct team, notify_peers.dw.work);
629
630 if (!rtnl_trylock()) {
631 schedule_delayed_work(&team->notify_peers.dw, 0);
632 return;
633 }
634 val = atomic_dec_if_positive(&team->notify_peers.count_pending);
635 if (val < 0) {
636 rtnl_unlock();
637 return;
638 }
639 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, team->dev);
640 rtnl_unlock();
641 if (val)
642 schedule_delayed_work(&team->notify_peers.dw,
643 msecs_to_jiffies(team->notify_peers.interval));
644 }
645
646 static void team_notify_peers(struct team *team)
647 {
648 if (!team->notify_peers.count || !netif_running(team->dev))
649 return;
650 atomic_add(team->notify_peers.count, &team->notify_peers.count_pending);
651 schedule_delayed_work(&team->notify_peers.dw, 0);
652 }
653
654 static void team_notify_peers_init(struct team *team)
655 {
656 INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work);
657 }
658
659 static void team_notify_peers_fini(struct team *team)
660 {
661 cancel_delayed_work_sync(&team->notify_peers.dw);
662 }
663
664
665 /*******************************
666 * Send multicast group rejoins
667 *******************************/
668
669 static void team_mcast_rejoin_work(struct work_struct *work)
670 {
671 struct team *team;
672 int val;
673
674 team = container_of(work, struct team, mcast_rejoin.dw.work);
675
676 if (!rtnl_trylock()) {
677 schedule_delayed_work(&team->mcast_rejoin.dw, 0);
678 return;
679 }
680 val = atomic_dec_if_positive(&team->mcast_rejoin.count_pending);
681 if (val < 0) {
682 rtnl_unlock();
683 return;
684 }
685 call_netdevice_notifiers(NETDEV_RESEND_IGMP, team->dev);
686 rtnl_unlock();
687 if (val)
688 schedule_delayed_work(&team->mcast_rejoin.dw,
689 msecs_to_jiffies(team->mcast_rejoin.interval));
690 }
691
692 static void team_mcast_rejoin(struct team *team)
693 {
694 if (!team->mcast_rejoin.count || !netif_running(team->dev))
695 return;
696 atomic_add(team->mcast_rejoin.count, &team->mcast_rejoin.count_pending);
697 schedule_delayed_work(&team->mcast_rejoin.dw, 0);
698 }
699
700 static void team_mcast_rejoin_init(struct team *team)
701 {
702 INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work);
703 }
704
705 static void team_mcast_rejoin_fini(struct team *team)
706 {
707 cancel_delayed_work_sync(&team->mcast_rejoin.dw);
708 }
709
710
711 /************************
712 * Rx path frame handler
713 ************************/
714
715 /* note: already called with rcu_read_lock */
716 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
717 {
718 struct sk_buff *skb = *pskb;
719 struct team_port *port;
720 struct team *team;
721 rx_handler_result_t res;
722
723 skb = skb_share_check(skb, GFP_ATOMIC);
724 if (!skb)
725 return RX_HANDLER_CONSUMED;
726
727 *pskb = skb;
728
729 port = team_port_get_rcu(skb->dev);
730 team = port->team;
731 if (!team_port_enabled(port)) {
732 /* allow exact match delivery for disabled ports */
733 res = RX_HANDLER_EXACT;
734 } else {
735 res = team->ops.receive(team, port, skb);
736 }
737 if (res == RX_HANDLER_ANOTHER) {
738 struct team_pcpu_stats *pcpu_stats;
739
740 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
741 u64_stats_update_begin(&pcpu_stats->syncp);
742 pcpu_stats->rx_packets++;
743 pcpu_stats->rx_bytes += skb->len;
744 if (skb->pkt_type == PACKET_MULTICAST)
745 pcpu_stats->rx_multicast++;
746 u64_stats_update_end(&pcpu_stats->syncp);
747
748 skb->dev = team->dev;
749 } else if (res == RX_HANDLER_EXACT) {
750 this_cpu_inc(team->pcpu_stats->rx_nohandler);
751 } else {
752 this_cpu_inc(team->pcpu_stats->rx_dropped);
753 }
754
755 return res;
756 }
757
758
759 /*************************************
760 * Multiqueue Tx port select override
761 *************************************/
762
763 static int team_queue_override_init(struct team *team)
764 {
765 struct list_head *listarr;
766 unsigned int queue_cnt = team->dev->num_tx_queues - 1;
767 unsigned int i;
768
769 if (!queue_cnt)
770 return 0;
771 listarr = kmalloc_array(queue_cnt, sizeof(struct list_head),
772 GFP_KERNEL);
773 if (!listarr)
774 return -ENOMEM;
775 team->qom_lists = listarr;
776 for (i = 0; i < queue_cnt; i++)
777 INIT_LIST_HEAD(listarr++);
778 return 0;
779 }
780
781 static void team_queue_override_fini(struct team *team)
782 {
783 kfree(team->qom_lists);
784 }
785
786 static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
787 {
788 return &team->qom_lists[queue_id - 1];
789 }
790
791 /*
792 * note: already called with rcu_read_lock
793 */
794 static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
795 {
796 struct list_head *qom_list;
797 struct team_port *port;
798
799 if (!team->queue_override_enabled || !skb->queue_mapping)
800 return false;
801 qom_list = __team_get_qom_list(team, skb->queue_mapping);
802 list_for_each_entry_rcu(port, qom_list, qom_list) {
803 if (!team_dev_queue_xmit(team, port, skb))
804 return true;
805 }
806 return false;
807 }
808
809 static void __team_queue_override_port_del(struct team *team,
810 struct team_port *port)
811 {
812 if (!port->queue_id)
813 return;
814 list_del_rcu(&port->qom_list);
815 }
816
817 static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
818 struct team_port *cur)
819 {
820 if (port->priority < cur->priority)
821 return true;
822 if (port->priority > cur->priority)
823 return false;
824 if (port->index < cur->index)
825 return true;
826 return false;
827 }
828
829 static void __team_queue_override_port_add(struct team *team,
830 struct team_port *port)
831 {
832 struct team_port *cur;
833 struct list_head *qom_list;
834 struct list_head *node;
835
836 if (!port->queue_id)
837 return;
838 qom_list = __team_get_qom_list(team, port->queue_id);
839 node = qom_list;
840 list_for_each_entry(cur, qom_list, qom_list) {
841 if (team_queue_override_port_has_gt_prio_than(port, cur))
842 break;
843 node = &cur->qom_list;
844 }
845 list_add_tail_rcu(&port->qom_list, node);
846 }
847
848 static void __team_queue_override_enabled_check(struct team *team)
849 {
850 struct team_port *port;
851 bool enabled = false;
852
853 list_for_each_entry(port, &team->port_list, list) {
854 if (port->queue_id) {
855 enabled = true;
856 break;
857 }
858 }
859 if (enabled == team->queue_override_enabled)
860 return;
861 netdev_dbg(team->dev, "%s queue override\n",
862 enabled ? "Enabling" : "Disabling");
863 team->queue_override_enabled = enabled;
864 }
865
866 static void team_queue_override_port_prio_changed(struct team *team,
867 struct team_port *port)
868 {
869 if (!port->queue_id || team_port_enabled(port))
870 return;
871 __team_queue_override_port_del(team, port);
872 __team_queue_override_port_add(team, port);
873 __team_queue_override_enabled_check(team);
874 }
875
876 static void team_queue_override_port_change_queue_id(struct team *team,
877 struct team_port *port,
878 u16 new_queue_id)
879 {
880 if (team_port_enabled(port)) {
881 __team_queue_override_port_del(team, port);
882 port->queue_id = new_queue_id;
883 __team_queue_override_port_add(team, port);
884 __team_queue_override_enabled_check(team);
885 } else {
886 port->queue_id = new_queue_id;
887 }
888 }
889
890 static void team_queue_override_port_add(struct team *team,
891 struct team_port *port)
892 {
893 __team_queue_override_port_add(team, port);
894 __team_queue_override_enabled_check(team);
895 }
896
897 static void team_queue_override_port_del(struct team *team,
898 struct team_port *port)
899 {
900 __team_queue_override_port_del(team, port);
901 __team_queue_override_enabled_check(team);
902 }
903
904
905 /****************
906 * Port handling
907 ****************/
908
909 static bool team_port_find(const struct team *team,
910 const struct team_port *port)
911 {
912 struct team_port *cur;
913
914 list_for_each_entry(cur, &team->port_list, list)
915 if (cur == port)
916 return true;
917 return false;
918 }
919
920 /*
921 * Enable/disable port by adding to enabled port hashlist and setting
922 * port->index (Might be racy so reader could see incorrect ifindex when
923 * processing a flying packet, but that is not a problem). Write guarded
924 * by team->lock.
925 */
926 static void team_port_enable(struct team *team,
927 struct team_port *port)
928 {
929 if (team_port_enabled(port))
930 return;
931 port->index = team->en_port_count++;
932 hlist_add_head_rcu(&port->hlist,
933 team_port_index_hash(team, port->index));
934 team_adjust_ops(team);
935 team_queue_override_port_add(team, port);
936 if (team->ops.port_enabled)
937 team->ops.port_enabled(team, port);
938 team_notify_peers(team);
939 team_mcast_rejoin(team);
940 team_lower_state_changed(port);
941 }
942
943 static void __reconstruct_port_hlist(struct team *team, int rm_index)
944 {
945 int i;
946 struct team_port *port;
947
948 for (i = rm_index + 1; i < team->en_port_count; i++) {
949 port = team_get_port_by_index(team, i);
950 hlist_del_rcu(&port->hlist);
951 port->index--;
952 hlist_add_head_rcu(&port->hlist,
953 team_port_index_hash(team, port->index));
954 }
955 }
956
957 static void team_port_disable(struct team *team,
958 struct team_port *port)
959 {
960 if (!team_port_enabled(port))
961 return;
962 if (team->ops.port_disabled)
963 team->ops.port_disabled(team, port);
964 hlist_del_rcu(&port->hlist);
965 __reconstruct_port_hlist(team, port->index);
966 port->index = -1;
967 team->en_port_count--;
968 team_queue_override_port_del(team, port);
969 team_adjust_ops(team);
970 team_lower_state_changed(port);
971 }
972
973 #define TEAM_VLAN_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
974 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
975 NETIF_F_HIGHDMA | NETIF_F_LRO)
976
977 #define TEAM_ENC_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
978 NETIF_F_RXCSUM | NETIF_F_ALL_TSO)
979
980 static void __team_compute_features(struct team *team)
981 {
982 struct team_port *port;
983 netdev_features_t vlan_features = TEAM_VLAN_FEATURES &
984 NETIF_F_ALL_FOR_ALL;
985 netdev_features_t enc_features = TEAM_ENC_FEATURES;
986 unsigned short max_hard_header_len = ETH_HLEN;
987 unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE |
988 IFF_XMIT_DST_RELEASE_PERM;
989
990 list_for_each_entry(port, &team->port_list, list) {
991 vlan_features = netdev_increment_features(vlan_features,
992 port->dev->vlan_features,
993 TEAM_VLAN_FEATURES);
994 enc_features =
995 netdev_increment_features(enc_features,
996 port->dev->hw_enc_features,
997 TEAM_ENC_FEATURES);
998
999
1000 dst_release_flag &= port->dev->priv_flags;
1001 if (port->dev->hard_header_len > max_hard_header_len)
1002 max_hard_header_len = port->dev->hard_header_len;
1003 }
1004
1005 team->dev->vlan_features = vlan_features;
1006 team->dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL |
1007 NETIF_F_HW_VLAN_CTAG_TX |
1008 NETIF_F_HW_VLAN_STAG_TX |
1009 NETIF_F_GSO_UDP_L4;
1010 team->dev->hard_header_len = max_hard_header_len;
1011
1012 team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
1013 if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
1014 team->dev->priv_flags |= IFF_XMIT_DST_RELEASE;
1015 }
1016
1017 static void team_compute_features(struct team *team)
1018 {
1019 mutex_lock(&team->lock);
1020 __team_compute_features(team);
1021 mutex_unlock(&team->lock);
1022 netdev_change_features(team->dev);
1023 }
1024
1025 static int team_port_enter(struct team *team, struct team_port *port)
1026 {
1027 int err = 0;
1028
1029 dev_hold(team->dev);
1030 if (team->ops.port_enter) {
1031 err = team->ops.port_enter(team, port);
1032 if (err) {
1033 netdev_err(team->dev, "Device %s failed to enter team mode\n",
1034 port->dev->name);
1035 goto err_port_enter;
1036 }
1037 }
1038
1039 return 0;
1040
1041 err_port_enter:
1042 dev_put(team->dev);
1043
1044 return err;
1045 }
1046
1047 static void team_port_leave(struct team *team, struct team_port *port)
1048 {
1049 if (team->ops.port_leave)
1050 team->ops.port_leave(team, port);
1051 dev_put(team->dev);
1052 }
1053
1054 #ifdef CONFIG_NET_POLL_CONTROLLER
1055 static int __team_port_enable_netpoll(struct team_port *port)
1056 {
1057 struct netpoll *np;
1058 int err;
1059
1060 np = kzalloc(sizeof(*np), GFP_KERNEL);
1061 if (!np)
1062 return -ENOMEM;
1063
1064 err = __netpoll_setup(np, port->dev);
1065 if (err) {
1066 kfree(np);
1067 return err;
1068 }
1069 port->np = np;
1070 return err;
1071 }
1072
1073 static int team_port_enable_netpoll(struct team_port *port)
1074 {
1075 if (!port->team->dev->npinfo)
1076 return 0;
1077
1078 return __team_port_enable_netpoll(port);
1079 }
1080
1081 static void team_port_disable_netpoll(struct team_port *port)
1082 {
1083 struct netpoll *np = port->np;
1084
1085 if (!np)
1086 return;
1087 port->np = NULL;
1088
1089 __netpoll_free(np);
1090 }
1091 #else
1092 static int team_port_enable_netpoll(struct team_port *port)
1093 {
1094 return 0;
1095 }
1096 static void team_port_disable_netpoll(struct team_port *port)
1097 {
1098 }
1099 #endif
1100
1101 static int team_upper_dev_link(struct team *team, struct team_port *port,
1102 struct netlink_ext_ack *extack)
1103 {
1104 struct netdev_lag_upper_info lag_upper_info;
1105 int err;
1106
1107 lag_upper_info.tx_type = team->mode->lag_tx_type;
1108 lag_upper_info.hash_type = NETDEV_LAG_HASH_UNKNOWN;
1109 err = netdev_master_upper_dev_link(port->dev, team->dev, NULL,
1110 &lag_upper_info, extack);
1111 if (err)
1112 return err;
1113 port->dev->priv_flags |= IFF_TEAM_PORT;
1114 return 0;
1115 }
1116
1117 static void team_upper_dev_unlink(struct team *team, struct team_port *port)
1118 {
1119 netdev_upper_dev_unlink(port->dev, team->dev);
1120 port->dev->priv_flags &= ~IFF_TEAM_PORT;
1121 }
1122
1123 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1124 static int team_dev_type_check_change(struct net_device *dev,
1125 struct net_device *port_dev);
1126
1127 static int team_port_add(struct team *team, struct net_device *port_dev,
1128 struct netlink_ext_ack *extack)
1129 {
1130 struct net_device *dev = team->dev;
1131 struct team_port *port;
1132 char *portname = port_dev->name;
1133 int err;
1134
1135 if (port_dev->flags & IFF_LOOPBACK) {
1136 NL_SET_ERR_MSG(extack, "Loopback device can't be added as a team port");
1137 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1138 portname);
1139 return -EINVAL;
1140 }
1141
1142 if (netif_is_team_port(port_dev)) {
1143 NL_SET_ERR_MSG(extack, "Device is already a port of a team device");
1144 netdev_err(dev, "Device %s is already a port "
1145 "of a team device\n", portname);
1146 return -EBUSY;
1147 }
1148
1149 if (dev == port_dev) {
1150 NL_SET_ERR_MSG(extack, "Cannot enslave team device to itself");
1151 netdev_err(dev, "Cannot enslave team device to itself\n");
1152 return -EINVAL;
1153 }
1154
1155 if (netdev_has_upper_dev(dev, port_dev)) {
1156 NL_SET_ERR_MSG(extack, "Device is already an upper device of the team interface");
1157 netdev_err(dev, "Device %s is already an upper device of the team interface\n",
1158 portname);
1159 return -EBUSY;
1160 }
1161
1162 if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1163 vlan_uses_dev(dev)) {
1164 NL_SET_ERR_MSG(extack, "Device is VLAN challenged and team device has VLAN set up");
1165 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1166 portname);
1167 return -EPERM;
1168 }
1169
1170 err = team_dev_type_check_change(dev, port_dev);
1171 if (err)
1172 return err;
1173
1174 if (port_dev->flags & IFF_UP) {
1175 NL_SET_ERR_MSG(extack, "Device is up. Set it down before adding it as a team port");
1176 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1177 portname);
1178 return -EBUSY;
1179 }
1180
1181 port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1182 GFP_KERNEL);
1183 if (!port)
1184 return -ENOMEM;
1185
1186 port->dev = port_dev;
1187 port->team = team;
1188 INIT_LIST_HEAD(&port->qom_list);
1189
1190 port->orig.mtu = port_dev->mtu;
1191 err = dev_set_mtu(port_dev, dev->mtu);
1192 if (err) {
1193 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1194 goto err_set_mtu;
1195 }
1196
1197 memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1198
1199 err = team_port_enter(team, port);
1200 if (err) {
1201 netdev_err(dev, "Device %s failed to enter team mode\n",
1202 portname);
1203 goto err_port_enter;
1204 }
1205
1206 err = dev_open(port_dev, extack);
1207 if (err) {
1208 netdev_dbg(dev, "Device %s opening failed\n",
1209 portname);
1210 goto err_dev_open;
1211 }
1212
1213 err = vlan_vids_add_by_dev(port_dev, dev);
1214 if (err) {
1215 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1216 portname);
1217 goto err_vids_add;
1218 }
1219
1220 err = team_port_enable_netpoll(port);
1221 if (err) {
1222 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1223 portname);
1224 goto err_enable_netpoll;
1225 }
1226
1227 if (!(dev->features & NETIF_F_LRO))
1228 dev_disable_lro(port_dev);
1229
1230 err = netdev_rx_handler_register(port_dev, team_handle_frame,
1231 port);
1232 if (err) {
1233 netdev_err(dev, "Device %s failed to register rx_handler\n",
1234 portname);
1235 goto err_handler_register;
1236 }
1237
1238 err = team_upper_dev_link(team, port, extack);
1239 if (err) {
1240 netdev_err(dev, "Device %s failed to set upper link\n",
1241 portname);
1242 goto err_set_upper_link;
1243 }
1244
1245 err = __team_option_inst_add_port(team, port);
1246 if (err) {
1247 netdev_err(dev, "Device %s failed to add per-port options\n",
1248 portname);
1249 goto err_option_port_add;
1250 }
1251
1252 /* set promiscuity level to new slave */
1253 if (dev->flags & IFF_PROMISC) {
1254 err = dev_set_promiscuity(port_dev, 1);
1255 if (err)
1256 goto err_set_slave_promisc;
1257 }
1258
1259 /* set allmulti level to new slave */
1260 if (dev->flags & IFF_ALLMULTI) {
1261 err = dev_set_allmulti(port_dev, 1);
1262 if (err) {
1263 if (dev->flags & IFF_PROMISC)
1264 dev_set_promiscuity(port_dev, -1);
1265 goto err_set_slave_promisc;
1266 }
1267 }
1268
1269 netif_addr_lock_bh(dev);
1270 dev_uc_sync_multiple(port_dev, dev);
1271 dev_mc_sync_multiple(port_dev, dev);
1272 netif_addr_unlock_bh(dev);
1273
1274 port->index = -1;
1275 list_add_tail_rcu(&port->list, &team->port_list);
1276 team_port_enable(team, port);
1277 __team_compute_features(team);
1278 __team_port_change_port_added(port, !!netif_oper_up(port_dev));
1279 __team_options_change_check(team);
1280
1281 netdev_info(dev, "Port device %s added\n", portname);
1282
1283 return 0;
1284
1285 err_set_slave_promisc:
1286 __team_option_inst_del_port(team, port);
1287
1288 err_option_port_add:
1289 team_upper_dev_unlink(team, port);
1290
1291 err_set_upper_link:
1292 netdev_rx_handler_unregister(port_dev);
1293
1294 err_handler_register:
1295 team_port_disable_netpoll(port);
1296
1297 err_enable_netpoll:
1298 vlan_vids_del_by_dev(port_dev, dev);
1299
1300 err_vids_add:
1301 dev_close(port_dev);
1302
1303 err_dev_open:
1304 team_port_leave(team, port);
1305 team_port_set_orig_dev_addr(port);
1306
1307 err_port_enter:
1308 dev_set_mtu(port_dev, port->orig.mtu);
1309
1310 err_set_mtu:
1311 kfree(port);
1312
1313 return err;
1314 }
1315
1316 static void __team_port_change_port_removed(struct team_port *port);
1317
1318 static int team_port_del(struct team *team, struct net_device *port_dev)
1319 {
1320 struct net_device *dev = team->dev;
1321 struct team_port *port;
1322 char *portname = port_dev->name;
1323
1324 port = team_port_get_rtnl(port_dev);
1325 if (!port || !team_port_find(team, port)) {
1326 netdev_err(dev, "Device %s does not act as a port of this team\n",
1327 portname);
1328 return -ENOENT;
1329 }
1330
1331 team_port_disable(team, port);
1332 list_del_rcu(&port->list);
1333
1334 if (dev->flags & IFF_PROMISC)
1335 dev_set_promiscuity(port_dev, -1);
1336 if (dev->flags & IFF_ALLMULTI)
1337 dev_set_allmulti(port_dev, -1);
1338
1339 team_upper_dev_unlink(team, port);
1340 netdev_rx_handler_unregister(port_dev);
1341 team_port_disable_netpoll(port);
1342 vlan_vids_del_by_dev(port_dev, dev);
1343 dev_uc_unsync(port_dev, dev);
1344 dev_mc_unsync(port_dev, dev);
1345 dev_close(port_dev);
1346 team_port_leave(team, port);
1347
1348 __team_option_inst_mark_removed_port(team, port);
1349 __team_options_change_check(team);
1350 __team_option_inst_del_port(team, port);
1351 __team_port_change_port_removed(port);
1352
1353 team_port_set_orig_dev_addr(port);
1354 dev_set_mtu(port_dev, port->orig.mtu);
1355 kfree_rcu(port, rcu);
1356 netdev_info(dev, "Port device %s removed\n", portname);
1357 __team_compute_features(team);
1358
1359 return 0;
1360 }
1361
1362
1363 /*****************
1364 * Net device ops
1365 *****************/
1366
1367 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1368 {
1369 ctx->data.str_val = team->mode->kind;
1370 return 0;
1371 }
1372
1373 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1374 {
1375 return team_change_mode(team, ctx->data.str_val);
1376 }
1377
1378 static int team_notify_peers_count_get(struct team *team,
1379 struct team_gsetter_ctx *ctx)
1380 {
1381 ctx->data.u32_val = team->notify_peers.count;
1382 return 0;
1383 }
1384
1385 static int team_notify_peers_count_set(struct team *team,
1386 struct team_gsetter_ctx *ctx)
1387 {
1388 team->notify_peers.count = ctx->data.u32_val;
1389 return 0;
1390 }
1391
1392 static int team_notify_peers_interval_get(struct team *team,
1393 struct team_gsetter_ctx *ctx)
1394 {
1395 ctx->data.u32_val = team->notify_peers.interval;
1396 return 0;
1397 }
1398
1399 static int team_notify_peers_interval_set(struct team *team,
1400 struct team_gsetter_ctx *ctx)
1401 {
1402 team->notify_peers.interval = ctx->data.u32_val;
1403 return 0;
1404 }
1405
1406 static int team_mcast_rejoin_count_get(struct team *team,
1407 struct team_gsetter_ctx *ctx)
1408 {
1409 ctx->data.u32_val = team->mcast_rejoin.count;
1410 return 0;
1411 }
1412
1413 static int team_mcast_rejoin_count_set(struct team *team,
1414 struct team_gsetter_ctx *ctx)
1415 {
1416 team->mcast_rejoin.count = ctx->data.u32_val;
1417 return 0;
1418 }
1419
1420 static int team_mcast_rejoin_interval_get(struct team *team,
1421 struct team_gsetter_ctx *ctx)
1422 {
1423 ctx->data.u32_val = team->mcast_rejoin.interval;
1424 return 0;
1425 }
1426
1427 static int team_mcast_rejoin_interval_set(struct team *team,
1428 struct team_gsetter_ctx *ctx)
1429 {
1430 team->mcast_rejoin.interval = ctx->data.u32_val;
1431 return 0;
1432 }
1433
1434 static int team_port_en_option_get(struct team *team,
1435 struct team_gsetter_ctx *ctx)
1436 {
1437 struct team_port *port = ctx->info->port;
1438
1439 ctx->data.bool_val = team_port_enabled(port);
1440 return 0;
1441 }
1442
1443 static int team_port_en_option_set(struct team *team,
1444 struct team_gsetter_ctx *ctx)
1445 {
1446 struct team_port *port = ctx->info->port;
1447
1448 if (ctx->data.bool_val)
1449 team_port_enable(team, port);
1450 else
1451 team_port_disable(team, port);
1452 return 0;
1453 }
1454
1455 static int team_user_linkup_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;
1461 return 0;
1462 }
1463
1464 static void __team_carrier_check(struct team *team);
1465
1466 static int team_user_linkup_option_set(struct team *team,
1467 struct team_gsetter_ctx *ctx)
1468 {
1469 struct team_port *port = ctx->info->port;
1470
1471 port->user.linkup = ctx->data.bool_val;
1472 team_refresh_port_linkup(port);
1473 __team_carrier_check(port->team);
1474 return 0;
1475 }
1476
1477 static int team_user_linkup_en_option_get(struct team *team,
1478 struct team_gsetter_ctx *ctx)
1479 {
1480 struct team_port *port = ctx->info->port;
1481
1482 ctx->data.bool_val = port->user.linkup_enabled;
1483 return 0;
1484 }
1485
1486 static int team_user_linkup_en_option_set(struct team *team,
1487 struct team_gsetter_ctx *ctx)
1488 {
1489 struct team_port *port = ctx->info->port;
1490
1491 port->user.linkup_enabled = ctx->data.bool_val;
1492 team_refresh_port_linkup(port);
1493 __team_carrier_check(port->team);
1494 return 0;
1495 }
1496
1497 static int team_priority_option_get(struct team *team,
1498 struct team_gsetter_ctx *ctx)
1499 {
1500 struct team_port *port = ctx->info->port;
1501
1502 ctx->data.s32_val = port->priority;
1503 return 0;
1504 }
1505
1506 static int team_priority_option_set(struct team *team,
1507 struct team_gsetter_ctx *ctx)
1508 {
1509 struct team_port *port = ctx->info->port;
1510 s32 priority = ctx->data.s32_val;
1511
1512 if (port->priority == priority)
1513 return 0;
1514 port->priority = priority;
1515 team_queue_override_port_prio_changed(team, port);
1516 return 0;
1517 }
1518
1519 static int team_queue_id_option_get(struct team *team,
1520 struct team_gsetter_ctx *ctx)
1521 {
1522 struct team_port *port = ctx->info->port;
1523
1524 ctx->data.u32_val = port->queue_id;
1525 return 0;
1526 }
1527
1528 static int team_queue_id_option_set(struct team *team,
1529 struct team_gsetter_ctx *ctx)
1530 {
1531 struct team_port *port = ctx->info->port;
1532 u16 new_queue_id = ctx->data.u32_val;
1533
1534 if (port->queue_id == new_queue_id)
1535 return 0;
1536 if (new_queue_id >= team->dev->real_num_tx_queues)
1537 return -EINVAL;
1538 team_queue_override_port_change_queue_id(team, port, new_queue_id);
1539 return 0;
1540 }
1541
1542 static const struct team_option team_options[] = {
1543 {
1544 .name = "mode",
1545 .type = TEAM_OPTION_TYPE_STRING,
1546 .getter = team_mode_option_get,
1547 .setter = team_mode_option_set,
1548 },
1549 {
1550 .name = "notify_peers_count",
1551 .type = TEAM_OPTION_TYPE_U32,
1552 .getter = team_notify_peers_count_get,
1553 .setter = team_notify_peers_count_set,
1554 },
1555 {
1556 .name = "notify_peers_interval",
1557 .type = TEAM_OPTION_TYPE_U32,
1558 .getter = team_notify_peers_interval_get,
1559 .setter = team_notify_peers_interval_set,
1560 },
1561 {
1562 .name = "mcast_rejoin_count",
1563 .type = TEAM_OPTION_TYPE_U32,
1564 .getter = team_mcast_rejoin_count_get,
1565 .setter = team_mcast_rejoin_count_set,
1566 },
1567 {
1568 .name = "mcast_rejoin_interval",
1569 .type = TEAM_OPTION_TYPE_U32,
1570 .getter = team_mcast_rejoin_interval_get,
1571 .setter = team_mcast_rejoin_interval_set,
1572 },
1573 {
1574 .name = "enabled",
1575 .type = TEAM_OPTION_TYPE_BOOL,
1576 .per_port = true,
1577 .getter = team_port_en_option_get,
1578 .setter = team_port_en_option_set,
1579 },
1580 {
1581 .name = "user_linkup",
1582 .type = TEAM_OPTION_TYPE_BOOL,
1583 .per_port = true,
1584 .getter = team_user_linkup_option_get,
1585 .setter = team_user_linkup_option_set,
1586 },
1587 {
1588 .name = "user_linkup_enabled",
1589 .type = TEAM_OPTION_TYPE_BOOL,
1590 .per_port = true,
1591 .getter = team_user_linkup_en_option_get,
1592 .setter = team_user_linkup_en_option_set,
1593 },
1594 {
1595 .name = "priority",
1596 .type = TEAM_OPTION_TYPE_S32,
1597 .per_port = true,
1598 .getter = team_priority_option_get,
1599 .setter = team_priority_option_set,
1600 },
1601 {
1602 .name = "queue_id",
1603 .type = TEAM_OPTION_TYPE_U32,
1604 .per_port = true,
1605 .getter = team_queue_id_option_get,
1606 .setter = team_queue_id_option_set,
1607 },
1608 };
1609
1610
1611 static int team_init(struct net_device *dev)
1612 {
1613 struct team *team = netdev_priv(dev);
1614 int i;
1615 int err;
1616
1617 team->dev = dev;
1618 mutex_init(&team->lock);
1619 team_set_no_mode(team);
1620
1621 team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1622 if (!team->pcpu_stats)
1623 return -ENOMEM;
1624
1625 for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1626 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1627 INIT_LIST_HEAD(&team->port_list);
1628 err = team_queue_override_init(team);
1629 if (err)
1630 goto err_team_queue_override_init;
1631
1632 team_adjust_ops(team);
1633
1634 INIT_LIST_HEAD(&team->option_list);
1635 INIT_LIST_HEAD(&team->option_inst_list);
1636
1637 team_notify_peers_init(team);
1638 team_mcast_rejoin_init(team);
1639
1640 err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1641 if (err)
1642 goto err_options_register;
1643 netif_carrier_off(dev);
1644
1645 netdev_lockdep_set_classes(dev);
1646
1647 return 0;
1648
1649 err_options_register:
1650 team_mcast_rejoin_fini(team);
1651 team_notify_peers_fini(team);
1652 team_queue_override_fini(team);
1653 err_team_queue_override_init:
1654 free_percpu(team->pcpu_stats);
1655
1656 return err;
1657 }
1658
1659 static void team_uninit(struct net_device *dev)
1660 {
1661 struct team *team = netdev_priv(dev);
1662 struct team_port *port;
1663 struct team_port *tmp;
1664
1665 mutex_lock(&team->lock);
1666 list_for_each_entry_safe(port, tmp, &team->port_list, list)
1667 team_port_del(team, port->dev);
1668
1669 __team_change_mode(team, NULL); /* cleanup */
1670 __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1671 team_mcast_rejoin_fini(team);
1672 team_notify_peers_fini(team);
1673 team_queue_override_fini(team);
1674 mutex_unlock(&team->lock);
1675 netdev_change_features(dev);
1676 }
1677
1678 static void team_destructor(struct net_device *dev)
1679 {
1680 struct team *team = netdev_priv(dev);
1681
1682 free_percpu(team->pcpu_stats);
1683 }
1684
1685 static int team_open(struct net_device *dev)
1686 {
1687 return 0;
1688 }
1689
1690 static int team_close(struct net_device *dev)
1691 {
1692 return 0;
1693 }
1694
1695 /*
1696 * note: already called with rcu_read_lock
1697 */
1698 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1699 {
1700 struct team *team = netdev_priv(dev);
1701 bool tx_success;
1702 unsigned int len = skb->len;
1703
1704 tx_success = team_queue_override_transmit(team, skb);
1705 if (!tx_success)
1706 tx_success = team->ops.transmit(team, skb);
1707 if (tx_success) {
1708 struct team_pcpu_stats *pcpu_stats;
1709
1710 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1711 u64_stats_update_begin(&pcpu_stats->syncp);
1712 pcpu_stats->tx_packets++;
1713 pcpu_stats->tx_bytes += len;
1714 u64_stats_update_end(&pcpu_stats->syncp);
1715 } else {
1716 this_cpu_inc(team->pcpu_stats->tx_dropped);
1717 }
1718
1719 return NETDEV_TX_OK;
1720 }
1721
1722 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1723 struct net_device *sb_dev)
1724 {
1725 /*
1726 * This helper function exists to help dev_pick_tx get the correct
1727 * destination queue. Using a helper function skips a call to
1728 * skb_tx_hash and will put the skbs in the queue we expect on their
1729 * way down to the team driver.
1730 */
1731 u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1732
1733 /*
1734 * Save the original txq to restore before passing to the driver
1735 */
1736 qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1737
1738 if (unlikely(txq >= dev->real_num_tx_queues)) {
1739 do {
1740 txq -= dev->real_num_tx_queues;
1741 } while (txq >= dev->real_num_tx_queues);
1742 }
1743 return txq;
1744 }
1745
1746 static void team_change_rx_flags(struct net_device *dev, int change)
1747 {
1748 struct team *team = netdev_priv(dev);
1749 struct team_port *port;
1750 int inc;
1751
1752 rcu_read_lock();
1753 list_for_each_entry_rcu(port, &team->port_list, list) {
1754 if (change & IFF_PROMISC) {
1755 inc = dev->flags & IFF_PROMISC ? 1 : -1;
1756 dev_set_promiscuity(port->dev, inc);
1757 }
1758 if (change & IFF_ALLMULTI) {
1759 inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1760 dev_set_allmulti(port->dev, inc);
1761 }
1762 }
1763 rcu_read_unlock();
1764 }
1765
1766 static void team_set_rx_mode(struct net_device *dev)
1767 {
1768 struct team *team = netdev_priv(dev);
1769 struct team_port *port;
1770
1771 rcu_read_lock();
1772 list_for_each_entry_rcu(port, &team->port_list, list) {
1773 dev_uc_sync_multiple(port->dev, dev);
1774 dev_mc_sync_multiple(port->dev, dev);
1775 }
1776 rcu_read_unlock();
1777 }
1778
1779 static int team_set_mac_address(struct net_device *dev, void *p)
1780 {
1781 struct sockaddr *addr = p;
1782 struct team *team = netdev_priv(dev);
1783 struct team_port *port;
1784
1785 if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1786 return -EADDRNOTAVAIL;
1787 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1788 mutex_lock(&team->lock);
1789 list_for_each_entry(port, &team->port_list, list)
1790 if (team->ops.port_change_dev_addr)
1791 team->ops.port_change_dev_addr(team, port);
1792 mutex_unlock(&team->lock);
1793 return 0;
1794 }
1795
1796 static int team_change_mtu(struct net_device *dev, int new_mtu)
1797 {
1798 struct team *team = netdev_priv(dev);
1799 struct team_port *port;
1800 int err;
1801
1802 /*
1803 * Alhough this is reader, it's guarded by team lock. It's not possible
1804 * to traverse list in reverse under rcu_read_lock
1805 */
1806 mutex_lock(&team->lock);
1807 team->port_mtu_change_allowed = true;
1808 list_for_each_entry(port, &team->port_list, list) {
1809 err = dev_set_mtu(port->dev, new_mtu);
1810 if (err) {
1811 netdev_err(dev, "Device %s failed to change mtu",
1812 port->dev->name);
1813 goto unwind;
1814 }
1815 }
1816 team->port_mtu_change_allowed = false;
1817 mutex_unlock(&team->lock);
1818
1819 dev->mtu = new_mtu;
1820
1821 return 0;
1822
1823 unwind:
1824 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1825 dev_set_mtu(port->dev, dev->mtu);
1826 team->port_mtu_change_allowed = false;
1827 mutex_unlock(&team->lock);
1828
1829 return err;
1830 }
1831
1832 static void
1833 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1834 {
1835 struct team *team = netdev_priv(dev);
1836 struct team_pcpu_stats *p;
1837 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1838 u32 rx_dropped = 0, tx_dropped = 0, rx_nohandler = 0;
1839 unsigned int start;
1840 int i;
1841
1842 for_each_possible_cpu(i) {
1843 p = per_cpu_ptr(team->pcpu_stats, i);
1844 do {
1845 start = u64_stats_fetch_begin_irq(&p->syncp);
1846 rx_packets = p->rx_packets;
1847 rx_bytes = p->rx_bytes;
1848 rx_multicast = p->rx_multicast;
1849 tx_packets = p->tx_packets;
1850 tx_bytes = p->tx_bytes;
1851 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
1852
1853 stats->rx_packets += rx_packets;
1854 stats->rx_bytes += rx_bytes;
1855 stats->multicast += rx_multicast;
1856 stats->tx_packets += tx_packets;
1857 stats->tx_bytes += tx_bytes;
1858 /*
1859 * rx_dropped, tx_dropped & rx_nohandler are u32,
1860 * updated without syncp protection.
1861 */
1862 rx_dropped += p->rx_dropped;
1863 tx_dropped += p->tx_dropped;
1864 rx_nohandler += p->rx_nohandler;
1865 }
1866 stats->rx_dropped = rx_dropped;
1867 stats->tx_dropped = tx_dropped;
1868 stats->rx_nohandler = rx_nohandler;
1869 }
1870
1871 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1872 {
1873 struct team *team = netdev_priv(dev);
1874 struct team_port *port;
1875 int err;
1876
1877 /*
1878 * Alhough this is reader, it's guarded by team lock. It's not possible
1879 * to traverse list in reverse under rcu_read_lock
1880 */
1881 mutex_lock(&team->lock);
1882 list_for_each_entry(port, &team->port_list, list) {
1883 err = vlan_vid_add(port->dev, proto, vid);
1884 if (err)
1885 goto unwind;
1886 }
1887 mutex_unlock(&team->lock);
1888
1889 return 0;
1890
1891 unwind:
1892 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1893 vlan_vid_del(port->dev, proto, vid);
1894 mutex_unlock(&team->lock);
1895
1896 return err;
1897 }
1898
1899 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1900 {
1901 struct team *team = netdev_priv(dev);
1902 struct team_port *port;
1903
1904 mutex_lock(&team->lock);
1905 list_for_each_entry(port, &team->port_list, list)
1906 vlan_vid_del(port->dev, proto, vid);
1907 mutex_unlock(&team->lock);
1908
1909 return 0;
1910 }
1911
1912 #ifdef CONFIG_NET_POLL_CONTROLLER
1913 static void team_poll_controller(struct net_device *dev)
1914 {
1915 }
1916
1917 static void __team_netpoll_cleanup(struct team *team)
1918 {
1919 struct team_port *port;
1920
1921 list_for_each_entry(port, &team->port_list, list)
1922 team_port_disable_netpoll(port);
1923 }
1924
1925 static void team_netpoll_cleanup(struct net_device *dev)
1926 {
1927 struct team *team = netdev_priv(dev);
1928
1929 mutex_lock(&team->lock);
1930 __team_netpoll_cleanup(team);
1931 mutex_unlock(&team->lock);
1932 }
1933
1934 static int team_netpoll_setup(struct net_device *dev,
1935 struct netpoll_info *npifo)
1936 {
1937 struct team *team = netdev_priv(dev);
1938 struct team_port *port;
1939 int err = 0;
1940
1941 mutex_lock(&team->lock);
1942 list_for_each_entry(port, &team->port_list, list) {
1943 err = __team_port_enable_netpoll(port);
1944 if (err) {
1945 __team_netpoll_cleanup(team);
1946 break;
1947 }
1948 }
1949 mutex_unlock(&team->lock);
1950 return err;
1951 }
1952 #endif
1953
1954 static int team_add_slave(struct net_device *dev, struct net_device *port_dev,
1955 struct netlink_ext_ack *extack)
1956 {
1957 struct team *team = netdev_priv(dev);
1958 int err;
1959
1960 mutex_lock(&team->lock);
1961 err = team_port_add(team, port_dev, extack);
1962 mutex_unlock(&team->lock);
1963
1964 if (!err)
1965 netdev_change_features(dev);
1966
1967 return err;
1968 }
1969
1970 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1971 {
1972 struct team *team = netdev_priv(dev);
1973 int err;
1974
1975 mutex_lock(&team->lock);
1976 err = team_port_del(team, port_dev);
1977 mutex_unlock(&team->lock);
1978
1979 if (!err)
1980 netdev_change_features(dev);
1981
1982 return err;
1983 }
1984
1985 static netdev_features_t team_fix_features(struct net_device *dev,
1986 netdev_features_t features)
1987 {
1988 struct team_port *port;
1989 struct team *team = netdev_priv(dev);
1990 netdev_features_t mask;
1991
1992 mask = features;
1993 features &= ~NETIF_F_ONE_FOR_ALL;
1994 features |= NETIF_F_ALL_FOR_ALL;
1995
1996 rcu_read_lock();
1997 list_for_each_entry_rcu(port, &team->port_list, list) {
1998 features = netdev_increment_features(features,
1999 port->dev->features,
2000 mask);
2001 }
2002 rcu_read_unlock();
2003
2004 features = netdev_add_tso_features(features, mask);
2005
2006 return features;
2007 }
2008
2009 static int team_change_carrier(struct net_device *dev, bool new_carrier)
2010 {
2011 struct team *team = netdev_priv(dev);
2012
2013 team->user_carrier_enabled = true;
2014
2015 if (new_carrier)
2016 netif_carrier_on(dev);
2017 else
2018 netif_carrier_off(dev);
2019 return 0;
2020 }
2021
2022 static const struct net_device_ops team_netdev_ops = {
2023 .ndo_init = team_init,
2024 .ndo_uninit = team_uninit,
2025 .ndo_open = team_open,
2026 .ndo_stop = team_close,
2027 .ndo_start_xmit = team_xmit,
2028 .ndo_select_queue = team_select_queue,
2029 .ndo_change_rx_flags = team_change_rx_flags,
2030 .ndo_set_rx_mode = team_set_rx_mode,
2031 .ndo_set_mac_address = team_set_mac_address,
2032 .ndo_change_mtu = team_change_mtu,
2033 .ndo_get_stats64 = team_get_stats64,
2034 .ndo_vlan_rx_add_vid = team_vlan_rx_add_vid,
2035 .ndo_vlan_rx_kill_vid = team_vlan_rx_kill_vid,
2036 #ifdef CONFIG_NET_POLL_CONTROLLER
2037 .ndo_poll_controller = team_poll_controller,
2038 .ndo_netpoll_setup = team_netpoll_setup,
2039 .ndo_netpoll_cleanup = team_netpoll_cleanup,
2040 #endif
2041 .ndo_add_slave = team_add_slave,
2042 .ndo_del_slave = team_del_slave,
2043 .ndo_fix_features = team_fix_features,
2044 .ndo_change_carrier = team_change_carrier,
2045 .ndo_features_check = passthru_features_check,
2046 };
2047
2048 /***********************
2049 * ethtool interface
2050 ***********************/
2051
2052 static void team_ethtool_get_drvinfo(struct net_device *dev,
2053 struct ethtool_drvinfo *drvinfo)
2054 {
2055 strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
2056 strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2057 }
2058
2059 static int team_ethtool_get_link_ksettings(struct net_device *dev,
2060 struct ethtool_link_ksettings *cmd)
2061 {
2062 struct team *team= netdev_priv(dev);
2063 unsigned long speed = 0;
2064 struct team_port *port;
2065
2066 cmd->base.duplex = DUPLEX_UNKNOWN;
2067 cmd->base.port = PORT_OTHER;
2068
2069 list_for_each_entry(port, &team->port_list, list) {
2070 if (team_port_txable(port)) {
2071 if (port->state.speed != SPEED_UNKNOWN)
2072 speed += port->state.speed;
2073 if (cmd->base.duplex == DUPLEX_UNKNOWN &&
2074 port->state.duplex != DUPLEX_UNKNOWN)
2075 cmd->base.duplex = port->state.duplex;
2076 }
2077 }
2078 cmd->base.speed = speed ? : SPEED_UNKNOWN;
2079
2080 return 0;
2081 }
2082
2083 static const struct ethtool_ops team_ethtool_ops = {
2084 .get_drvinfo = team_ethtool_get_drvinfo,
2085 .get_link = ethtool_op_get_link,
2086 .get_link_ksettings = team_ethtool_get_link_ksettings,
2087 };
2088
2089 /***********************
2090 * rt netlink interface
2091 ***********************/
2092
2093 static void team_setup_by_port(struct net_device *dev,
2094 struct net_device *port_dev)
2095 {
2096 dev->header_ops = port_dev->header_ops;
2097 dev->type = port_dev->type;
2098 dev->hard_header_len = port_dev->hard_header_len;
2099 dev->addr_len = port_dev->addr_len;
2100 dev->mtu = port_dev->mtu;
2101 memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2102 eth_hw_addr_inherit(dev, port_dev);
2103 }
2104
2105 static int team_dev_type_check_change(struct net_device *dev,
2106 struct net_device *port_dev)
2107 {
2108 struct team *team = netdev_priv(dev);
2109 char *portname = port_dev->name;
2110 int err;
2111
2112 if (dev->type == port_dev->type)
2113 return 0;
2114 if (!list_empty(&team->port_list)) {
2115 netdev_err(dev, "Device %s is of different type\n", portname);
2116 return -EBUSY;
2117 }
2118 err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2119 err = notifier_to_errno(err);
2120 if (err) {
2121 netdev_err(dev, "Refused to change device type\n");
2122 return err;
2123 }
2124 dev_uc_flush(dev);
2125 dev_mc_flush(dev);
2126 team_setup_by_port(dev, port_dev);
2127 call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2128 return 0;
2129 }
2130
2131 static void team_setup(struct net_device *dev)
2132 {
2133 ether_setup(dev);
2134 dev->max_mtu = ETH_MAX_MTU;
2135
2136 dev->netdev_ops = &team_netdev_ops;
2137 dev->ethtool_ops = &team_ethtool_ops;
2138 dev->needs_free_netdev = true;
2139 dev->priv_destructor = team_destructor;
2140 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2141 dev->priv_flags |= IFF_NO_QUEUE;
2142 dev->priv_flags |= IFF_TEAM;
2143
2144 /*
2145 * Indicate we support unicast address filtering. That way core won't
2146 * bring us to promisc mode in case a unicast addr is added.
2147 * Let this up to underlay drivers.
2148 */
2149 dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2150
2151 dev->features |= NETIF_F_LLTX;
2152 dev->features |= NETIF_F_GRO;
2153
2154 /* Don't allow team devices to change network namespaces. */
2155 dev->features |= NETIF_F_NETNS_LOCAL;
2156
2157 dev->hw_features = TEAM_VLAN_FEATURES |
2158 NETIF_F_HW_VLAN_CTAG_RX |
2159 NETIF_F_HW_VLAN_CTAG_FILTER;
2160
2161 dev->hw_features |= NETIF_F_GSO_ENCAP_ALL | NETIF_F_GSO_UDP_L4;
2162 dev->features |= dev->hw_features;
2163 dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
2164 }
2165
2166 static int team_newlink(struct net *src_net, struct net_device *dev,
2167 struct nlattr *tb[], struct nlattr *data[],
2168 struct netlink_ext_ack *extack)
2169 {
2170 if (tb[IFLA_ADDRESS] == NULL)
2171 eth_hw_addr_random(dev);
2172
2173 return register_netdevice(dev);
2174 }
2175
2176 static int team_validate(struct nlattr *tb[], struct nlattr *data[],
2177 struct netlink_ext_ack *extack)
2178 {
2179 if (tb[IFLA_ADDRESS]) {
2180 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2181 return -EINVAL;
2182 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2183 return -EADDRNOTAVAIL;
2184 }
2185 return 0;
2186 }
2187
2188 static unsigned int team_get_num_tx_queues(void)
2189 {
2190 return TEAM_DEFAULT_NUM_TX_QUEUES;
2191 }
2192
2193 static unsigned int team_get_num_rx_queues(void)
2194 {
2195 return TEAM_DEFAULT_NUM_RX_QUEUES;
2196 }
2197
2198 static struct rtnl_link_ops team_link_ops __read_mostly = {
2199 .kind = DRV_NAME,
2200 .priv_size = sizeof(struct team),
2201 .setup = team_setup,
2202 .newlink = team_newlink,
2203 .validate = team_validate,
2204 .get_num_tx_queues = team_get_num_tx_queues,
2205 .get_num_rx_queues = team_get_num_rx_queues,
2206 };
2207
2208
2209 /***********************************
2210 * Generic netlink custom interface
2211 ***********************************/
2212
2213 static struct genl_family team_nl_family;
2214
2215 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2216 [TEAM_ATTR_UNSPEC] = { .type = NLA_UNSPEC, },
2217 [TEAM_ATTR_TEAM_IFINDEX] = { .type = NLA_U32 },
2218 [TEAM_ATTR_LIST_OPTION] = { .type = NLA_NESTED },
2219 [TEAM_ATTR_LIST_PORT] = { .type = NLA_NESTED },
2220 };
2221
2222 static const struct nla_policy
2223 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2224 [TEAM_ATTR_OPTION_UNSPEC] = { .type = NLA_UNSPEC, },
2225 [TEAM_ATTR_OPTION_NAME] = {
2226 .type = NLA_STRING,
2227 .len = TEAM_STRING_MAX_LEN,
2228 },
2229 [TEAM_ATTR_OPTION_CHANGED] = { .type = NLA_FLAG },
2230 [TEAM_ATTR_OPTION_TYPE] = { .type = NLA_U8 },
2231 [TEAM_ATTR_OPTION_DATA] = { .type = NLA_BINARY },
2232 };
2233
2234 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2235 {
2236 struct sk_buff *msg;
2237 void *hdr;
2238 int err;
2239
2240 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2241 if (!msg)
2242 return -ENOMEM;
2243
2244 hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2245 &team_nl_family, 0, TEAM_CMD_NOOP);
2246 if (!hdr) {
2247 err = -EMSGSIZE;
2248 goto err_msg_put;
2249 }
2250
2251 genlmsg_end(msg, hdr);
2252
2253 return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2254
2255 err_msg_put:
2256 nlmsg_free(msg);
2257
2258 return err;
2259 }
2260
2261 /*
2262 * Netlink cmd functions should be locked by following two functions.
2263 * Since dev gets held here, that ensures dev won't disappear in between.
2264 */
2265 static struct team *team_nl_team_get(struct genl_info *info)
2266 {
2267 struct net *net = genl_info_net(info);
2268 int ifindex;
2269 struct net_device *dev;
2270 struct team *team;
2271
2272 if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2273 return NULL;
2274
2275 ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2276 dev = dev_get_by_index(net, ifindex);
2277 if (!dev || dev->netdev_ops != &team_netdev_ops) {
2278 if (dev)
2279 dev_put(dev);
2280 return NULL;
2281 }
2282
2283 team = netdev_priv(dev);
2284 mutex_lock(&team->lock);
2285 return team;
2286 }
2287
2288 static void team_nl_team_put(struct team *team)
2289 {
2290 mutex_unlock(&team->lock);
2291 dev_put(team->dev);
2292 }
2293
2294 typedef int team_nl_send_func_t(struct sk_buff *skb,
2295 struct team *team, u32 portid);
2296
2297 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2298 {
2299 return genlmsg_unicast(dev_net(team->dev), skb, portid);
2300 }
2301
2302 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2303 struct team_option_inst *opt_inst)
2304 {
2305 struct nlattr *option_item;
2306 struct team_option *option = opt_inst->option;
2307 struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2308 struct team_gsetter_ctx ctx;
2309 int err;
2310
2311 ctx.info = opt_inst_info;
2312 err = team_option_get(team, opt_inst, &ctx);
2313 if (err)
2314 return err;
2315
2316 option_item = nla_nest_start_noflag(skb, TEAM_ATTR_ITEM_OPTION);
2317 if (!option_item)
2318 return -EMSGSIZE;
2319
2320 if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2321 goto nest_cancel;
2322 if (opt_inst_info->port &&
2323 nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2324 opt_inst_info->port->dev->ifindex))
2325 goto nest_cancel;
2326 if (opt_inst->option->array_size &&
2327 nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2328 opt_inst_info->array_index))
2329 goto nest_cancel;
2330
2331 switch (option->type) {
2332 case TEAM_OPTION_TYPE_U32:
2333 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2334 goto nest_cancel;
2335 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2336 goto nest_cancel;
2337 break;
2338 case TEAM_OPTION_TYPE_STRING:
2339 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2340 goto nest_cancel;
2341 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2342 ctx.data.str_val))
2343 goto nest_cancel;
2344 break;
2345 case TEAM_OPTION_TYPE_BINARY:
2346 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2347 goto nest_cancel;
2348 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2349 ctx.data.bin_val.ptr))
2350 goto nest_cancel;
2351 break;
2352 case TEAM_OPTION_TYPE_BOOL:
2353 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2354 goto nest_cancel;
2355 if (ctx.data.bool_val &&
2356 nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2357 goto nest_cancel;
2358 break;
2359 case TEAM_OPTION_TYPE_S32:
2360 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2361 goto nest_cancel;
2362 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2363 goto nest_cancel;
2364 break;
2365 default:
2366 BUG();
2367 }
2368 if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2369 goto nest_cancel;
2370 if (opt_inst->changed) {
2371 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2372 goto nest_cancel;
2373 opt_inst->changed = false;
2374 }
2375 nla_nest_end(skb, option_item);
2376 return 0;
2377
2378 nest_cancel:
2379 nla_nest_cancel(skb, option_item);
2380 return -EMSGSIZE;
2381 }
2382
2383 static int __send_and_alloc_skb(struct sk_buff **pskb,
2384 struct team *team, u32 portid,
2385 team_nl_send_func_t *send_func)
2386 {
2387 int err;
2388
2389 if (*pskb) {
2390 err = send_func(*pskb, team, portid);
2391 if (err)
2392 return err;
2393 }
2394 *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2395 if (!*pskb)
2396 return -ENOMEM;
2397 return 0;
2398 }
2399
2400 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2401 int flags, team_nl_send_func_t *send_func,
2402 struct list_head *sel_opt_inst_list)
2403 {
2404 struct nlattr *option_list;
2405 struct nlmsghdr *nlh;
2406 void *hdr;
2407 struct team_option_inst *opt_inst;
2408 int err;
2409 struct sk_buff *skb = NULL;
2410 bool incomplete;
2411 int i;
2412
2413 opt_inst = list_first_entry(sel_opt_inst_list,
2414 struct team_option_inst, tmp_list);
2415
2416 start_again:
2417 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2418 if (err)
2419 return err;
2420
2421 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2422 TEAM_CMD_OPTIONS_GET);
2423 if (!hdr) {
2424 nlmsg_free(skb);
2425 return -EMSGSIZE;
2426 }
2427
2428 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2429 goto nla_put_failure;
2430 option_list = nla_nest_start_noflag(skb, TEAM_ATTR_LIST_OPTION);
2431 if (!option_list)
2432 goto nla_put_failure;
2433
2434 i = 0;
2435 incomplete = false;
2436 list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2437 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2438 if (err) {
2439 if (err == -EMSGSIZE) {
2440 if (!i)
2441 goto errout;
2442 incomplete = true;
2443 break;
2444 }
2445 goto errout;
2446 }
2447 i++;
2448 }
2449
2450 nla_nest_end(skb, option_list);
2451 genlmsg_end(skb, hdr);
2452 if (incomplete)
2453 goto start_again;
2454
2455 send_done:
2456 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2457 if (!nlh) {
2458 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2459 if (err)
2460 return err;
2461 goto send_done;
2462 }
2463
2464 return send_func(skb, team, portid);
2465
2466 nla_put_failure:
2467 err = -EMSGSIZE;
2468 errout:
2469 nlmsg_free(skb);
2470 return err;
2471 }
2472
2473 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2474 {
2475 struct team *team;
2476 struct team_option_inst *opt_inst;
2477 int err;
2478 LIST_HEAD(sel_opt_inst_list);
2479
2480 team = team_nl_team_get(info);
2481 if (!team)
2482 return -EINVAL;
2483
2484 list_for_each_entry(opt_inst, &team->option_inst_list, list)
2485 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2486 err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2487 NLM_F_ACK, team_nl_send_unicast,
2488 &sel_opt_inst_list);
2489
2490 team_nl_team_put(team);
2491
2492 return err;
2493 }
2494
2495 static int team_nl_send_event_options_get(struct team *team,
2496 struct list_head *sel_opt_inst_list);
2497
2498 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2499 {
2500 struct team *team;
2501 int err = 0;
2502 int i;
2503 struct nlattr *nl_option;
2504
2505 rtnl_lock();
2506
2507 team = team_nl_team_get(info);
2508 if (!team) {
2509 err = -EINVAL;
2510 goto rtnl_unlock;
2511 }
2512
2513 err = -EINVAL;
2514 if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2515 err = -EINVAL;
2516 goto team_put;
2517 }
2518
2519 nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2520 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2521 struct nlattr *attr;
2522 struct nlattr *attr_data;
2523 LIST_HEAD(opt_inst_list);
2524 enum team_option_type opt_type;
2525 int opt_port_ifindex = 0; /* != 0 for per-port options */
2526 u32 opt_array_index = 0;
2527 bool opt_is_array = false;
2528 struct team_option_inst *opt_inst;
2529 char *opt_name;
2530 bool opt_found = false;
2531
2532 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2533 err = -EINVAL;
2534 goto team_put;
2535 }
2536 err = nla_parse_nested_deprecated(opt_attrs,
2537 TEAM_ATTR_OPTION_MAX,
2538 nl_option,
2539 team_nl_option_policy,
2540 info->extack);
2541 if (err)
2542 goto team_put;
2543 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2544 !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2545 err = -EINVAL;
2546 goto team_put;
2547 }
2548 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2549 case NLA_U32:
2550 opt_type = TEAM_OPTION_TYPE_U32;
2551 break;
2552 case NLA_STRING:
2553 opt_type = TEAM_OPTION_TYPE_STRING;
2554 break;
2555 case NLA_BINARY:
2556 opt_type = TEAM_OPTION_TYPE_BINARY;
2557 break;
2558 case NLA_FLAG:
2559 opt_type = TEAM_OPTION_TYPE_BOOL;
2560 break;
2561 case NLA_S32:
2562 opt_type = TEAM_OPTION_TYPE_S32;
2563 break;
2564 default:
2565 goto team_put;
2566 }
2567
2568 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2569 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2570 err = -EINVAL;
2571 goto team_put;
2572 }
2573
2574 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2575 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2576 if (attr)
2577 opt_port_ifindex = nla_get_u32(attr);
2578
2579 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2580 if (attr) {
2581 opt_is_array = true;
2582 opt_array_index = nla_get_u32(attr);
2583 }
2584
2585 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2586 struct team_option *option = opt_inst->option;
2587 struct team_gsetter_ctx ctx;
2588 struct team_option_inst_info *opt_inst_info;
2589 int tmp_ifindex;
2590
2591 opt_inst_info = &opt_inst->info;
2592 tmp_ifindex = opt_inst_info->port ?
2593 opt_inst_info->port->dev->ifindex : 0;
2594 if (option->type != opt_type ||
2595 strcmp(option->name, opt_name) ||
2596 tmp_ifindex != opt_port_ifindex ||
2597 (option->array_size && !opt_is_array) ||
2598 opt_inst_info->array_index != opt_array_index)
2599 continue;
2600 opt_found = true;
2601 ctx.info = opt_inst_info;
2602 switch (opt_type) {
2603 case TEAM_OPTION_TYPE_U32:
2604 ctx.data.u32_val = nla_get_u32(attr_data);
2605 break;
2606 case TEAM_OPTION_TYPE_STRING:
2607 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2608 err = -EINVAL;
2609 goto team_put;
2610 }
2611 ctx.data.str_val = nla_data(attr_data);
2612 break;
2613 case TEAM_OPTION_TYPE_BINARY:
2614 ctx.data.bin_val.len = nla_len(attr_data);
2615 ctx.data.bin_val.ptr = nla_data(attr_data);
2616 break;
2617 case TEAM_OPTION_TYPE_BOOL:
2618 ctx.data.bool_val = attr_data ? true : false;
2619 break;
2620 case TEAM_OPTION_TYPE_S32:
2621 ctx.data.s32_val = nla_get_s32(attr_data);
2622 break;
2623 default:
2624 BUG();
2625 }
2626 err = team_option_set(team, opt_inst, &ctx);
2627 if (err)
2628 goto team_put;
2629 opt_inst->changed = true;
2630 list_add(&opt_inst->tmp_list, &opt_inst_list);
2631 }
2632 if (!opt_found) {
2633 err = -ENOENT;
2634 goto team_put;
2635 }
2636
2637 err = team_nl_send_event_options_get(team, &opt_inst_list);
2638 if (err)
2639 break;
2640 }
2641
2642 team_put:
2643 team_nl_team_put(team);
2644 rtnl_unlock:
2645 rtnl_unlock();
2646 return err;
2647 }
2648
2649 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2650 struct team_port *port)
2651 {
2652 struct nlattr *port_item;
2653
2654 port_item = nla_nest_start_noflag(skb, TEAM_ATTR_ITEM_PORT);
2655 if (!port_item)
2656 goto nest_cancel;
2657 if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2658 goto nest_cancel;
2659 if (port->changed) {
2660 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2661 goto nest_cancel;
2662 port->changed = false;
2663 }
2664 if ((port->removed &&
2665 nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2666 (port->state.linkup &&
2667 nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2668 nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2669 nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2670 goto nest_cancel;
2671 nla_nest_end(skb, port_item);
2672 return 0;
2673
2674 nest_cancel:
2675 nla_nest_cancel(skb, port_item);
2676 return -EMSGSIZE;
2677 }
2678
2679 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2680 int flags, team_nl_send_func_t *send_func,
2681 struct team_port *one_port)
2682 {
2683 struct nlattr *port_list;
2684 struct nlmsghdr *nlh;
2685 void *hdr;
2686 struct team_port *port;
2687 int err;
2688 struct sk_buff *skb = NULL;
2689 bool incomplete;
2690 int i;
2691
2692 port = list_first_entry_or_null(&team->port_list,
2693 struct team_port, list);
2694
2695 start_again:
2696 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2697 if (err)
2698 return err;
2699
2700 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2701 TEAM_CMD_PORT_LIST_GET);
2702 if (!hdr) {
2703 nlmsg_free(skb);
2704 return -EMSGSIZE;
2705 }
2706
2707 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2708 goto nla_put_failure;
2709 port_list = nla_nest_start_noflag(skb, TEAM_ATTR_LIST_PORT);
2710 if (!port_list)
2711 goto nla_put_failure;
2712
2713 i = 0;
2714 incomplete = false;
2715
2716 /* If one port is selected, called wants to send port list containing
2717 * only this port. Otherwise go through all listed ports and send all
2718 */
2719 if (one_port) {
2720 err = team_nl_fill_one_port_get(skb, one_port);
2721 if (err)
2722 goto errout;
2723 } else if (port) {
2724 list_for_each_entry_from(port, &team->port_list, list) {
2725 err = team_nl_fill_one_port_get(skb, port);
2726 if (err) {
2727 if (err == -EMSGSIZE) {
2728 if (!i)
2729 goto errout;
2730 incomplete = true;
2731 break;
2732 }
2733 goto errout;
2734 }
2735 i++;
2736 }
2737 }
2738
2739 nla_nest_end(skb, port_list);
2740 genlmsg_end(skb, hdr);
2741 if (incomplete)
2742 goto start_again;
2743
2744 send_done:
2745 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2746 if (!nlh) {
2747 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2748 if (err)
2749 return err;
2750 goto send_done;
2751 }
2752
2753 return send_func(skb, team, portid);
2754
2755 nla_put_failure:
2756 err = -EMSGSIZE;
2757 errout:
2758 nlmsg_free(skb);
2759 return err;
2760 }
2761
2762 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2763 struct genl_info *info)
2764 {
2765 struct team *team;
2766 int err;
2767
2768 team = team_nl_team_get(info);
2769 if (!team)
2770 return -EINVAL;
2771
2772 err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2773 NLM_F_ACK, team_nl_send_unicast, NULL);
2774
2775 team_nl_team_put(team);
2776
2777 return err;
2778 }
2779
2780 static const struct genl_ops team_nl_ops[] = {
2781 {
2782 .cmd = TEAM_CMD_NOOP,
2783 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2784 .doit = team_nl_cmd_noop,
2785 },
2786 {
2787 .cmd = TEAM_CMD_OPTIONS_SET,
2788 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2789 .doit = team_nl_cmd_options_set,
2790 .flags = GENL_ADMIN_PERM,
2791 },
2792 {
2793 .cmd = TEAM_CMD_OPTIONS_GET,
2794 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2795 .doit = team_nl_cmd_options_get,
2796 .flags = GENL_ADMIN_PERM,
2797 },
2798 {
2799 .cmd = TEAM_CMD_PORT_LIST_GET,
2800 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2801 .doit = team_nl_cmd_port_list_get,
2802 .flags = GENL_ADMIN_PERM,
2803 },
2804 };
2805
2806 static const struct genl_multicast_group team_nl_mcgrps[] = {
2807 { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2808 };
2809
2810 static struct genl_family team_nl_family __ro_after_init = {
2811 .name = TEAM_GENL_NAME,
2812 .version = TEAM_GENL_VERSION,
2813 .maxattr = TEAM_ATTR_MAX,
2814 .policy = team_nl_policy,
2815 .netnsok = true,
2816 .module = THIS_MODULE,
2817 .ops = team_nl_ops,
2818 .n_ops = ARRAY_SIZE(team_nl_ops),
2819 .mcgrps = team_nl_mcgrps,
2820 .n_mcgrps = ARRAY_SIZE(team_nl_mcgrps),
2821 };
2822
2823 static int team_nl_send_multicast(struct sk_buff *skb,
2824 struct team *team, u32 portid)
2825 {
2826 return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2827 skb, 0, 0, GFP_KERNEL);
2828 }
2829
2830 static int team_nl_send_event_options_get(struct team *team,
2831 struct list_head *sel_opt_inst_list)
2832 {
2833 return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2834 sel_opt_inst_list);
2835 }
2836
2837 static int team_nl_send_event_port_get(struct team *team,
2838 struct team_port *port)
2839 {
2840 return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2841 port);
2842 }
2843
2844 static int __init team_nl_init(void)
2845 {
2846 return genl_register_family(&team_nl_family);
2847 }
2848
2849 static void team_nl_fini(void)
2850 {
2851 genl_unregister_family(&team_nl_family);
2852 }
2853
2854
2855 /******************
2856 * Change checkers
2857 ******************/
2858
2859 static void __team_options_change_check(struct team *team)
2860 {
2861 int err;
2862 struct team_option_inst *opt_inst;
2863 LIST_HEAD(sel_opt_inst_list);
2864
2865 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2866 if (opt_inst->changed)
2867 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2868 }
2869 err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2870 if (err && err != -ESRCH)
2871 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2872 err);
2873 }
2874
2875 /* rtnl lock is held */
2876
2877 static void __team_port_change_send(struct team_port *port, bool linkup)
2878 {
2879 int err;
2880
2881 port->changed = true;
2882 port->state.linkup = linkup;
2883 team_refresh_port_linkup(port);
2884 if (linkup) {
2885 struct ethtool_link_ksettings ecmd;
2886
2887 err = __ethtool_get_link_ksettings(port->dev, &ecmd);
2888 if (!err) {
2889 port->state.speed = ecmd.base.speed;
2890 port->state.duplex = ecmd.base.duplex;
2891 goto send_event;
2892 }
2893 }
2894 port->state.speed = 0;
2895 port->state.duplex = 0;
2896
2897 send_event:
2898 err = team_nl_send_event_port_get(port->team, port);
2899 if (err && err != -ESRCH)
2900 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2901 port->dev->name, err);
2902
2903 }
2904
2905 static void __team_carrier_check(struct team *team)
2906 {
2907 struct team_port *port;
2908 bool team_linkup;
2909
2910 if (team->user_carrier_enabled)
2911 return;
2912
2913 team_linkup = false;
2914 list_for_each_entry(port, &team->port_list, list) {
2915 if (port->linkup) {
2916 team_linkup = true;
2917 break;
2918 }
2919 }
2920
2921 if (team_linkup)
2922 netif_carrier_on(team->dev);
2923 else
2924 netif_carrier_off(team->dev);
2925 }
2926
2927 static void __team_port_change_check(struct team_port *port, bool linkup)
2928 {
2929 if (port->state.linkup != linkup)
2930 __team_port_change_send(port, linkup);
2931 __team_carrier_check(port->team);
2932 }
2933
2934 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2935 {
2936 __team_port_change_send(port, linkup);
2937 __team_carrier_check(port->team);
2938 }
2939
2940 static void __team_port_change_port_removed(struct team_port *port)
2941 {
2942 port->removed = true;
2943 __team_port_change_send(port, false);
2944 __team_carrier_check(port->team);
2945 }
2946
2947 static void team_port_change_check(struct team_port *port, bool linkup)
2948 {
2949 struct team *team = port->team;
2950
2951 mutex_lock(&team->lock);
2952 __team_port_change_check(port, linkup);
2953 mutex_unlock(&team->lock);
2954 }
2955
2956
2957 /************************************
2958 * Net device notifier event handler
2959 ************************************/
2960
2961 static int team_device_event(struct notifier_block *unused,
2962 unsigned long event, void *ptr)
2963 {
2964 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2965 struct team_port *port;
2966
2967 port = team_port_get_rtnl(dev);
2968 if (!port)
2969 return NOTIFY_DONE;
2970
2971 switch (event) {
2972 case NETDEV_UP:
2973 if (netif_oper_up(dev))
2974 team_port_change_check(port, true);
2975 break;
2976 case NETDEV_DOWN:
2977 team_port_change_check(port, false);
2978 break;
2979 case NETDEV_CHANGE:
2980 if (netif_running(port->dev))
2981 team_port_change_check(port,
2982 !!netif_oper_up(port->dev));
2983 break;
2984 case NETDEV_UNREGISTER:
2985 team_del_slave(port->team->dev, dev);
2986 break;
2987 case NETDEV_FEAT_CHANGE:
2988 team_compute_features(port->team);
2989 break;
2990 case NETDEV_PRECHANGEMTU:
2991 /* Forbid to change mtu of underlaying device */
2992 if (!port->team->port_mtu_change_allowed)
2993 return NOTIFY_BAD;
2994 break;
2995 case NETDEV_PRE_TYPE_CHANGE:
2996 /* Forbid to change type of underlaying device */
2997 return NOTIFY_BAD;
2998 case NETDEV_RESEND_IGMP:
2999 /* Propagate to master device */
3000 call_netdevice_notifiers(event, port->team->dev);
3001 break;
3002 }
3003 return NOTIFY_DONE;
3004 }
3005
3006 static struct notifier_block team_notifier_block __read_mostly = {
3007 .notifier_call = team_device_event,
3008 };
3009
3010
3011 /***********************
3012 * Module init and exit
3013 ***********************/
3014
3015 static int __init team_module_init(void)
3016 {
3017 int err;
3018
3019 register_netdevice_notifier(&team_notifier_block);
3020
3021 err = rtnl_link_register(&team_link_ops);
3022 if (err)
3023 goto err_rtnl_reg;
3024
3025 err = team_nl_init();
3026 if (err)
3027 goto err_nl_init;
3028
3029 return 0;
3030
3031 err_nl_init:
3032 rtnl_link_unregister(&team_link_ops);
3033
3034 err_rtnl_reg:
3035 unregister_netdevice_notifier(&team_notifier_block);
3036
3037 return err;
3038 }
3039
3040 static void __exit team_module_exit(void)
3041 {
3042 team_nl_fini();
3043 rtnl_link_unregister(&team_link_ops);
3044 unregister_netdevice_notifier(&team_notifier_block);
3045 }
3046
3047 module_init(team_module_init);
3048 module_exit(team_module_exit);
3049
3050 MODULE_LICENSE("GPL v2");
3051 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
3052 MODULE_DESCRIPTION("Ethernet team device driver");
3053 MODULE_ALIAS_RTNL_LINK(DRV_NAME);
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