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Merge branch 'am335x-phy-fixes' into omap-for-v5.0/fixes-v2
[mirror_ubuntu-eoan-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_rtnl(const struct net_device *dev)
45 {
46 struct team_port *port = rtnl_dereference(dev->rx_handler_data);
47
48 return team_port_exists(dev) ? port : NULL;
49 }
50
51 /*
52 * Since the ability to change device address for open port device is tested in
53 * team_port_add, this function can be called without control of return value
54 */
55 static int __set_port_dev_addr(struct net_device *port_dev,
56 const unsigned char *dev_addr)
57 {
58 struct sockaddr_storage addr;
59
60 memcpy(addr.__data, dev_addr, port_dev->addr_len);
61 addr.ss_family = port_dev->type;
62 return dev_set_mac_address(port_dev, (struct sockaddr *)&addr, NULL);
63 }
64
65 static int team_port_set_orig_dev_addr(struct team_port *port)
66 {
67 return __set_port_dev_addr(port->dev, port->orig.dev_addr);
68 }
69
70 static int team_port_set_team_dev_addr(struct team *team,
71 struct team_port *port)
72 {
73 return __set_port_dev_addr(port->dev, team->dev->dev_addr);
74 }
75
76 int team_modeop_port_enter(struct team *team, struct team_port *port)
77 {
78 return team_port_set_team_dev_addr(team, port);
79 }
80 EXPORT_SYMBOL(team_modeop_port_enter);
81
82 void team_modeop_port_change_dev_addr(struct team *team,
83 struct team_port *port)
84 {
85 team_port_set_team_dev_addr(team, port);
86 }
87 EXPORT_SYMBOL(team_modeop_port_change_dev_addr);
88
89 static void team_lower_state_changed(struct team_port *port)
90 {
91 struct netdev_lag_lower_state_info info;
92
93 info.link_up = port->linkup;
94 info.tx_enabled = team_port_enabled(port);
95 netdev_lower_state_changed(port->dev, &info);
96 }
97
98 static void team_refresh_port_linkup(struct team_port *port)
99 {
100 bool new_linkup = port->user.linkup_enabled ? port->user.linkup :
101 port->state.linkup;
102
103 if (port->linkup != new_linkup) {
104 port->linkup = new_linkup;
105 team_lower_state_changed(port);
106 }
107 }
108
109
110 /*******************
111 * Options handling
112 *******************/
113
114 struct team_option_inst { /* One for each option instance */
115 struct list_head list;
116 struct list_head tmp_list;
117 struct team_option *option;
118 struct team_option_inst_info info;
119 bool changed;
120 bool removed;
121 };
122
123 static struct team_option *__team_find_option(struct team *team,
124 const char *opt_name)
125 {
126 struct team_option *option;
127
128 list_for_each_entry(option, &team->option_list, list) {
129 if (strcmp(option->name, opt_name) == 0)
130 return option;
131 }
132 return NULL;
133 }
134
135 static void __team_option_inst_del(struct team_option_inst *opt_inst)
136 {
137 list_del(&opt_inst->list);
138 kfree(opt_inst);
139 }
140
141 static void __team_option_inst_del_option(struct team *team,
142 struct team_option *option)
143 {
144 struct team_option_inst *opt_inst, *tmp;
145
146 list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
147 if (opt_inst->option == option)
148 __team_option_inst_del(opt_inst);
149 }
150 }
151
152 static int __team_option_inst_add(struct team *team, struct team_option *option,
153 struct team_port *port)
154 {
155 struct team_option_inst *opt_inst;
156 unsigned int array_size;
157 unsigned int i;
158 int err;
159
160 array_size = option->array_size;
161 if (!array_size)
162 array_size = 1; /* No array but still need one instance */
163
164 for (i = 0; i < array_size; i++) {
165 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL);
166 if (!opt_inst)
167 return -ENOMEM;
168 opt_inst->option = option;
169 opt_inst->info.port = port;
170 opt_inst->info.array_index = i;
171 opt_inst->changed = true;
172 opt_inst->removed = false;
173 list_add_tail(&opt_inst->list, &team->option_inst_list);
174 if (option->init) {
175 err = option->init(team, &opt_inst->info);
176 if (err)
177 return err;
178 }
179
180 }
181 return 0;
182 }
183
184 static int __team_option_inst_add_option(struct team *team,
185 struct team_option *option)
186 {
187 int err;
188
189 if (!option->per_port) {
190 err = __team_option_inst_add(team, option, NULL);
191 if (err)
192 goto inst_del_option;
193 }
194 return 0;
195
196 inst_del_option:
197 __team_option_inst_del_option(team, option);
198 return err;
199 }
200
201 static void __team_option_inst_mark_removed_option(struct team *team,
202 struct team_option *option)
203 {
204 struct team_option_inst *opt_inst;
205
206 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
207 if (opt_inst->option == option) {
208 opt_inst->changed = true;
209 opt_inst->removed = true;
210 }
211 }
212 }
213
214 static void __team_option_inst_del_port(struct team *team,
215 struct team_port *port)
216 {
217 struct team_option_inst *opt_inst, *tmp;
218
219 list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
220 if (opt_inst->option->per_port &&
221 opt_inst->info.port == port)
222 __team_option_inst_del(opt_inst);
223 }
224 }
225
226 static int __team_option_inst_add_port(struct team *team,
227 struct team_port *port)
228 {
229 struct team_option *option;
230 int err;
231
232 list_for_each_entry(option, &team->option_list, list) {
233 if (!option->per_port)
234 continue;
235 err = __team_option_inst_add(team, option, port);
236 if (err)
237 goto inst_del_port;
238 }
239 return 0;
240
241 inst_del_port:
242 __team_option_inst_del_port(team, port);
243 return err;
244 }
245
246 static void __team_option_inst_mark_removed_port(struct team *team,
247 struct team_port *port)
248 {
249 struct team_option_inst *opt_inst;
250
251 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
252 if (opt_inst->info.port == port) {
253 opt_inst->changed = true;
254 opt_inst->removed = true;
255 }
256 }
257 }
258
259 static bool __team_option_inst_tmp_find(const struct list_head *opts,
260 const struct team_option_inst *needle)
261 {
262 struct team_option_inst *opt_inst;
263
264 list_for_each_entry(opt_inst, opts, tmp_list)
265 if (opt_inst == needle)
266 return true;
267 return false;
268 }
269
270 static int __team_options_register(struct team *team,
271 const struct team_option *option,
272 size_t option_count)
273 {
274 int i;
275 struct team_option **dst_opts;
276 int err;
277
278 dst_opts = kcalloc(option_count, sizeof(struct team_option *),
279 GFP_KERNEL);
280 if (!dst_opts)
281 return -ENOMEM;
282 for (i = 0; i < option_count; i++, option++) {
283 if (__team_find_option(team, option->name)) {
284 err = -EEXIST;
285 goto alloc_rollback;
286 }
287 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
288 if (!dst_opts[i]) {
289 err = -ENOMEM;
290 goto alloc_rollback;
291 }
292 }
293
294 for (i = 0; i < option_count; i++) {
295 err = __team_option_inst_add_option(team, dst_opts[i]);
296 if (err)
297 goto inst_rollback;
298 list_add_tail(&dst_opts[i]->list, &team->option_list);
299 }
300
301 kfree(dst_opts);
302 return 0;
303
304 inst_rollback:
305 for (i--; i >= 0; i--)
306 __team_option_inst_del_option(team, dst_opts[i]);
307
308 i = option_count - 1;
309 alloc_rollback:
310 for (i--; i >= 0; i--)
311 kfree(dst_opts[i]);
312
313 kfree(dst_opts);
314 return err;
315 }
316
317 static void __team_options_mark_removed(struct team *team,
318 const struct team_option *option,
319 size_t option_count)
320 {
321 int i;
322
323 for (i = 0; i < option_count; i++, option++) {
324 struct team_option *del_opt;
325
326 del_opt = __team_find_option(team, option->name);
327 if (del_opt)
328 __team_option_inst_mark_removed_option(team, del_opt);
329 }
330 }
331
332 static void __team_options_unregister(struct team *team,
333 const struct team_option *option,
334 size_t option_count)
335 {
336 int i;
337
338 for (i = 0; i < option_count; i++, option++) {
339 struct team_option *del_opt;
340
341 del_opt = __team_find_option(team, option->name);
342 if (del_opt) {
343 __team_option_inst_del_option(team, del_opt);
344 list_del(&del_opt->list);
345 kfree(del_opt);
346 }
347 }
348 }
349
350 static void __team_options_change_check(struct team *team);
351
352 int team_options_register(struct team *team,
353 const struct team_option *option,
354 size_t option_count)
355 {
356 int err;
357
358 err = __team_options_register(team, option, option_count);
359 if (err)
360 return err;
361 __team_options_change_check(team);
362 return 0;
363 }
364 EXPORT_SYMBOL(team_options_register);
365
366 void team_options_unregister(struct team *team,
367 const struct team_option *option,
368 size_t option_count)
369 {
370 __team_options_mark_removed(team, option, option_count);
371 __team_options_change_check(team);
372 __team_options_unregister(team, option, option_count);
373 }
374 EXPORT_SYMBOL(team_options_unregister);
375
376 static int team_option_get(struct team *team,
377 struct team_option_inst *opt_inst,
378 struct team_gsetter_ctx *ctx)
379 {
380 if (!opt_inst->option->getter)
381 return -EOPNOTSUPP;
382 return opt_inst->option->getter(team, ctx);
383 }
384
385 static int team_option_set(struct team *team,
386 struct team_option_inst *opt_inst,
387 struct team_gsetter_ctx *ctx)
388 {
389 if (!opt_inst->option->setter)
390 return -EOPNOTSUPP;
391 return opt_inst->option->setter(team, ctx);
392 }
393
394 void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info)
395 {
396 struct team_option_inst *opt_inst;
397
398 opt_inst = container_of(opt_inst_info, struct team_option_inst, info);
399 opt_inst->changed = true;
400 }
401 EXPORT_SYMBOL(team_option_inst_set_change);
402
403 void team_options_change_check(struct team *team)
404 {
405 __team_options_change_check(team);
406 }
407 EXPORT_SYMBOL(team_options_change_check);
408
409
410 /****************
411 * Mode handling
412 ****************/
413
414 static LIST_HEAD(mode_list);
415 static DEFINE_SPINLOCK(mode_list_lock);
416
417 struct team_mode_item {
418 struct list_head list;
419 const struct team_mode *mode;
420 };
421
422 static struct team_mode_item *__find_mode(const char *kind)
423 {
424 struct team_mode_item *mitem;
425
426 list_for_each_entry(mitem, &mode_list, list) {
427 if (strcmp(mitem->mode->kind, kind) == 0)
428 return mitem;
429 }
430 return NULL;
431 }
432
433 static bool is_good_mode_name(const char *name)
434 {
435 while (*name != '\0') {
436 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
437 return false;
438 name++;
439 }
440 return true;
441 }
442
443 int team_mode_register(const struct team_mode *mode)
444 {
445 int err = 0;
446 struct team_mode_item *mitem;
447
448 if (!is_good_mode_name(mode->kind) ||
449 mode->priv_size > TEAM_MODE_PRIV_SIZE)
450 return -EINVAL;
451
452 mitem = kmalloc(sizeof(*mitem), GFP_KERNEL);
453 if (!mitem)
454 return -ENOMEM;
455
456 spin_lock(&mode_list_lock);
457 if (__find_mode(mode->kind)) {
458 err = -EEXIST;
459 kfree(mitem);
460 goto unlock;
461 }
462 mitem->mode = mode;
463 list_add_tail(&mitem->list, &mode_list);
464 unlock:
465 spin_unlock(&mode_list_lock);
466 return err;
467 }
468 EXPORT_SYMBOL(team_mode_register);
469
470 void team_mode_unregister(const struct team_mode *mode)
471 {
472 struct team_mode_item *mitem;
473
474 spin_lock(&mode_list_lock);
475 mitem = __find_mode(mode->kind);
476 if (mitem) {
477 list_del_init(&mitem->list);
478 kfree(mitem);
479 }
480 spin_unlock(&mode_list_lock);
481 }
482 EXPORT_SYMBOL(team_mode_unregister);
483
484 static const struct team_mode *team_mode_get(const char *kind)
485 {
486 struct team_mode_item *mitem;
487 const struct team_mode *mode = NULL;
488
489 spin_lock(&mode_list_lock);
490 mitem = __find_mode(kind);
491 if (!mitem) {
492 spin_unlock(&mode_list_lock);
493 request_module("team-mode-%s", kind);
494 spin_lock(&mode_list_lock);
495 mitem = __find_mode(kind);
496 }
497 if (mitem) {
498 mode = mitem->mode;
499 if (!try_module_get(mode->owner))
500 mode = NULL;
501 }
502
503 spin_unlock(&mode_list_lock);
504 return mode;
505 }
506
507 static void team_mode_put(const struct team_mode *mode)
508 {
509 module_put(mode->owner);
510 }
511
512 static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
513 {
514 dev_kfree_skb_any(skb);
515 return false;
516 }
517
518 static rx_handler_result_t team_dummy_receive(struct team *team,
519 struct team_port *port,
520 struct sk_buff *skb)
521 {
522 return RX_HANDLER_ANOTHER;
523 }
524
525 static const struct team_mode __team_no_mode = {
526 .kind = "*NOMODE*",
527 };
528
529 static bool team_is_mode_set(struct team *team)
530 {
531 return team->mode != &__team_no_mode;
532 }
533
534 static void team_set_no_mode(struct team *team)
535 {
536 team->user_carrier_enabled = false;
537 team->mode = &__team_no_mode;
538 }
539
540 static void team_adjust_ops(struct team *team)
541 {
542 /*
543 * To avoid checks in rx/tx skb paths, ensure here that non-null and
544 * correct ops are always set.
545 */
546
547 if (!team->en_port_count || !team_is_mode_set(team) ||
548 !team->mode->ops->transmit)
549 team->ops.transmit = team_dummy_transmit;
550 else
551 team->ops.transmit = team->mode->ops->transmit;
552
553 if (!team->en_port_count || !team_is_mode_set(team) ||
554 !team->mode->ops->receive)
555 team->ops.receive = team_dummy_receive;
556 else
557 team->ops.receive = team->mode->ops->receive;
558 }
559
560 /*
561 * We can benefit from the fact that it's ensured no port is present
562 * at the time of mode change. Therefore no packets are in fly so there's no
563 * need to set mode operations in any special way.
564 */
565 static int __team_change_mode(struct team *team,
566 const struct team_mode *new_mode)
567 {
568 /* Check if mode was previously set and do cleanup if so */
569 if (team_is_mode_set(team)) {
570 void (*exit_op)(struct team *team) = team->ops.exit;
571
572 /* Clear ops area so no callback is called any longer */
573 memset(&team->ops, 0, sizeof(struct team_mode_ops));
574 team_adjust_ops(team);
575
576 if (exit_op)
577 exit_op(team);
578 team_mode_put(team->mode);
579 team_set_no_mode(team);
580 /* zero private data area */
581 memset(&team->mode_priv, 0,
582 sizeof(struct team) - offsetof(struct team, mode_priv));
583 }
584
585 if (!new_mode)
586 return 0;
587
588 if (new_mode->ops->init) {
589 int err;
590
591 err = new_mode->ops->init(team);
592 if (err)
593 return err;
594 }
595
596 team->mode = new_mode;
597 memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
598 team_adjust_ops(team);
599
600 return 0;
601 }
602
603 static int team_change_mode(struct team *team, const char *kind)
604 {
605 const struct team_mode *new_mode;
606 struct net_device *dev = team->dev;
607 int err;
608
609 if (!list_empty(&team->port_list)) {
610 netdev_err(dev, "No ports can be present during mode change\n");
611 return -EBUSY;
612 }
613
614 if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) {
615 netdev_err(dev, "Unable to change to the same mode the team is in\n");
616 return -EINVAL;
617 }
618
619 new_mode = team_mode_get(kind);
620 if (!new_mode) {
621 netdev_err(dev, "Mode \"%s\" not found\n", kind);
622 return -EINVAL;
623 }
624
625 err = __team_change_mode(team, new_mode);
626 if (err) {
627 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
628 team_mode_put(new_mode);
629 return err;
630 }
631
632 netdev_info(dev, "Mode changed to \"%s\"\n", kind);
633 return 0;
634 }
635
636
637 /*********************
638 * Peers notification
639 *********************/
640
641 static void team_notify_peers_work(struct work_struct *work)
642 {
643 struct team *team;
644 int val;
645
646 team = container_of(work, struct team, notify_peers.dw.work);
647
648 if (!rtnl_trylock()) {
649 schedule_delayed_work(&team->notify_peers.dw, 0);
650 return;
651 }
652 val = atomic_dec_if_positive(&team->notify_peers.count_pending);
653 if (val < 0) {
654 rtnl_unlock();
655 return;
656 }
657 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, team->dev);
658 rtnl_unlock();
659 if (val)
660 schedule_delayed_work(&team->notify_peers.dw,
661 msecs_to_jiffies(team->notify_peers.interval));
662 }
663
664 static void team_notify_peers(struct team *team)
665 {
666 if (!team->notify_peers.count || !netif_running(team->dev))
667 return;
668 atomic_add(team->notify_peers.count, &team->notify_peers.count_pending);
669 schedule_delayed_work(&team->notify_peers.dw, 0);
670 }
671
672 static void team_notify_peers_init(struct team *team)
673 {
674 INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work);
675 }
676
677 static void team_notify_peers_fini(struct team *team)
678 {
679 cancel_delayed_work_sync(&team->notify_peers.dw);
680 }
681
682
683 /*******************************
684 * Send multicast group rejoins
685 *******************************/
686
687 static void team_mcast_rejoin_work(struct work_struct *work)
688 {
689 struct team *team;
690 int val;
691
692 team = container_of(work, struct team, mcast_rejoin.dw.work);
693
694 if (!rtnl_trylock()) {
695 schedule_delayed_work(&team->mcast_rejoin.dw, 0);
696 return;
697 }
698 val = atomic_dec_if_positive(&team->mcast_rejoin.count_pending);
699 if (val < 0) {
700 rtnl_unlock();
701 return;
702 }
703 call_netdevice_notifiers(NETDEV_RESEND_IGMP, team->dev);
704 rtnl_unlock();
705 if (val)
706 schedule_delayed_work(&team->mcast_rejoin.dw,
707 msecs_to_jiffies(team->mcast_rejoin.interval));
708 }
709
710 static void team_mcast_rejoin(struct team *team)
711 {
712 if (!team->mcast_rejoin.count || !netif_running(team->dev))
713 return;
714 atomic_add(team->mcast_rejoin.count, &team->mcast_rejoin.count_pending);
715 schedule_delayed_work(&team->mcast_rejoin.dw, 0);
716 }
717
718 static void team_mcast_rejoin_init(struct team *team)
719 {
720 INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work);
721 }
722
723 static void team_mcast_rejoin_fini(struct team *team)
724 {
725 cancel_delayed_work_sync(&team->mcast_rejoin.dw);
726 }
727
728
729 /************************
730 * Rx path frame handler
731 ************************/
732
733 /* note: already called with rcu_read_lock */
734 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
735 {
736 struct sk_buff *skb = *pskb;
737 struct team_port *port;
738 struct team *team;
739 rx_handler_result_t res;
740
741 skb = skb_share_check(skb, GFP_ATOMIC);
742 if (!skb)
743 return RX_HANDLER_CONSUMED;
744
745 *pskb = skb;
746
747 port = team_port_get_rcu(skb->dev);
748 team = port->team;
749 if (!team_port_enabled(port)) {
750 /* allow exact match delivery for disabled ports */
751 res = RX_HANDLER_EXACT;
752 } else {
753 res = team->ops.receive(team, port, skb);
754 }
755 if (res == RX_HANDLER_ANOTHER) {
756 struct team_pcpu_stats *pcpu_stats;
757
758 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
759 u64_stats_update_begin(&pcpu_stats->syncp);
760 pcpu_stats->rx_packets++;
761 pcpu_stats->rx_bytes += skb->len;
762 if (skb->pkt_type == PACKET_MULTICAST)
763 pcpu_stats->rx_multicast++;
764 u64_stats_update_end(&pcpu_stats->syncp);
765
766 skb->dev = team->dev;
767 } else if (res == RX_HANDLER_EXACT) {
768 this_cpu_inc(team->pcpu_stats->rx_nohandler);
769 } else {
770 this_cpu_inc(team->pcpu_stats->rx_dropped);
771 }
772
773 return res;
774 }
775
776
777 /*************************************
778 * Multiqueue Tx port select override
779 *************************************/
780
781 static int team_queue_override_init(struct team *team)
782 {
783 struct list_head *listarr;
784 unsigned int queue_cnt = team->dev->num_tx_queues - 1;
785 unsigned int i;
786
787 if (!queue_cnt)
788 return 0;
789 listarr = kmalloc_array(queue_cnt, sizeof(struct list_head),
790 GFP_KERNEL);
791 if (!listarr)
792 return -ENOMEM;
793 team->qom_lists = listarr;
794 for (i = 0; i < queue_cnt; i++)
795 INIT_LIST_HEAD(listarr++);
796 return 0;
797 }
798
799 static void team_queue_override_fini(struct team *team)
800 {
801 kfree(team->qom_lists);
802 }
803
804 static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
805 {
806 return &team->qom_lists[queue_id - 1];
807 }
808
809 /*
810 * note: already called with rcu_read_lock
811 */
812 static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
813 {
814 struct list_head *qom_list;
815 struct team_port *port;
816
817 if (!team->queue_override_enabled || !skb->queue_mapping)
818 return false;
819 qom_list = __team_get_qom_list(team, skb->queue_mapping);
820 list_for_each_entry_rcu(port, qom_list, qom_list) {
821 if (!team_dev_queue_xmit(team, port, skb))
822 return true;
823 }
824 return false;
825 }
826
827 static void __team_queue_override_port_del(struct team *team,
828 struct team_port *port)
829 {
830 if (!port->queue_id)
831 return;
832 list_del_rcu(&port->qom_list);
833 }
834
835 static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
836 struct team_port *cur)
837 {
838 if (port->priority < cur->priority)
839 return true;
840 if (port->priority > cur->priority)
841 return false;
842 if (port->index < cur->index)
843 return true;
844 return false;
845 }
846
847 static void __team_queue_override_port_add(struct team *team,
848 struct team_port *port)
849 {
850 struct team_port *cur;
851 struct list_head *qom_list;
852 struct list_head *node;
853
854 if (!port->queue_id)
855 return;
856 qom_list = __team_get_qom_list(team, port->queue_id);
857 node = qom_list;
858 list_for_each_entry(cur, qom_list, qom_list) {
859 if (team_queue_override_port_has_gt_prio_than(port, cur))
860 break;
861 node = &cur->qom_list;
862 }
863 list_add_tail_rcu(&port->qom_list, node);
864 }
865
866 static void __team_queue_override_enabled_check(struct team *team)
867 {
868 struct team_port *port;
869 bool enabled = false;
870
871 list_for_each_entry(port, &team->port_list, list) {
872 if (port->queue_id) {
873 enabled = true;
874 break;
875 }
876 }
877 if (enabled == team->queue_override_enabled)
878 return;
879 netdev_dbg(team->dev, "%s queue override\n",
880 enabled ? "Enabling" : "Disabling");
881 team->queue_override_enabled = enabled;
882 }
883
884 static void team_queue_override_port_prio_changed(struct team *team,
885 struct team_port *port)
886 {
887 if (!port->queue_id || team_port_enabled(port))
888 return;
889 __team_queue_override_port_del(team, port);
890 __team_queue_override_port_add(team, port);
891 __team_queue_override_enabled_check(team);
892 }
893
894 static void team_queue_override_port_change_queue_id(struct team *team,
895 struct team_port *port,
896 u16 new_queue_id)
897 {
898 if (team_port_enabled(port)) {
899 __team_queue_override_port_del(team, port);
900 port->queue_id = new_queue_id;
901 __team_queue_override_port_add(team, port);
902 __team_queue_override_enabled_check(team);
903 } else {
904 port->queue_id = new_queue_id;
905 }
906 }
907
908 static void team_queue_override_port_add(struct team *team,
909 struct team_port *port)
910 {
911 __team_queue_override_port_add(team, port);
912 __team_queue_override_enabled_check(team);
913 }
914
915 static void team_queue_override_port_del(struct team *team,
916 struct team_port *port)
917 {
918 __team_queue_override_port_del(team, port);
919 __team_queue_override_enabled_check(team);
920 }
921
922
923 /****************
924 * Port handling
925 ****************/
926
927 static bool team_port_find(const struct team *team,
928 const struct team_port *port)
929 {
930 struct team_port *cur;
931
932 list_for_each_entry(cur, &team->port_list, list)
933 if (cur == port)
934 return true;
935 return false;
936 }
937
938 /*
939 * Enable/disable port by adding to enabled port hashlist and setting
940 * port->index (Might be racy so reader could see incorrect ifindex when
941 * processing a flying packet, but that is not a problem). Write guarded
942 * by team->lock.
943 */
944 static void team_port_enable(struct team *team,
945 struct team_port *port)
946 {
947 if (team_port_enabled(port))
948 return;
949 port->index = team->en_port_count++;
950 hlist_add_head_rcu(&port->hlist,
951 team_port_index_hash(team, port->index));
952 team_adjust_ops(team);
953 team_queue_override_port_add(team, port);
954 if (team->ops.port_enabled)
955 team->ops.port_enabled(team, port);
956 team_notify_peers(team);
957 team_mcast_rejoin(team);
958 team_lower_state_changed(port);
959 }
960
961 static void __reconstruct_port_hlist(struct team *team, int rm_index)
962 {
963 int i;
964 struct team_port *port;
965
966 for (i = rm_index + 1; i < team->en_port_count; i++) {
967 port = team_get_port_by_index(team, i);
968 hlist_del_rcu(&port->hlist);
969 port->index--;
970 hlist_add_head_rcu(&port->hlist,
971 team_port_index_hash(team, port->index));
972 }
973 }
974
975 static void team_port_disable(struct team *team,
976 struct team_port *port)
977 {
978 if (!team_port_enabled(port))
979 return;
980 if (team->ops.port_disabled)
981 team->ops.port_disabled(team, port);
982 hlist_del_rcu(&port->hlist);
983 __reconstruct_port_hlist(team, port->index);
984 port->index = -1;
985 team->en_port_count--;
986 team_queue_override_port_del(team, port);
987 team_adjust_ops(team);
988 team_lower_state_changed(port);
989 }
990
991 #define TEAM_VLAN_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
992 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
993 NETIF_F_HIGHDMA | NETIF_F_LRO)
994
995 #define TEAM_ENC_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
996 NETIF_F_RXCSUM | NETIF_F_ALL_TSO)
997
998 static void __team_compute_features(struct team *team)
999 {
1000 struct team_port *port;
1001 netdev_features_t vlan_features = TEAM_VLAN_FEATURES &
1002 NETIF_F_ALL_FOR_ALL;
1003 netdev_features_t enc_features = TEAM_ENC_FEATURES;
1004 unsigned short max_hard_header_len = ETH_HLEN;
1005 unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE |
1006 IFF_XMIT_DST_RELEASE_PERM;
1007
1008 list_for_each_entry(port, &team->port_list, list) {
1009 vlan_features = netdev_increment_features(vlan_features,
1010 port->dev->vlan_features,
1011 TEAM_VLAN_FEATURES);
1012 enc_features =
1013 netdev_increment_features(enc_features,
1014 port->dev->hw_enc_features,
1015 TEAM_ENC_FEATURES);
1016
1017
1018 dst_release_flag &= port->dev->priv_flags;
1019 if (port->dev->hard_header_len > max_hard_header_len)
1020 max_hard_header_len = port->dev->hard_header_len;
1021 }
1022
1023 team->dev->vlan_features = vlan_features;
1024 team->dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL |
1025 NETIF_F_GSO_UDP_L4;
1026 team->dev->hard_header_len = max_hard_header_len;
1027
1028 team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
1029 if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
1030 team->dev->priv_flags |= IFF_XMIT_DST_RELEASE;
1031 }
1032
1033 static void team_compute_features(struct team *team)
1034 {
1035 mutex_lock(&team->lock);
1036 __team_compute_features(team);
1037 mutex_unlock(&team->lock);
1038 netdev_change_features(team->dev);
1039 }
1040
1041 static int team_port_enter(struct team *team, struct team_port *port)
1042 {
1043 int err = 0;
1044
1045 dev_hold(team->dev);
1046 if (team->ops.port_enter) {
1047 err = team->ops.port_enter(team, port);
1048 if (err) {
1049 netdev_err(team->dev, "Device %s failed to enter team mode\n",
1050 port->dev->name);
1051 goto err_port_enter;
1052 }
1053 }
1054
1055 return 0;
1056
1057 err_port_enter:
1058 dev_put(team->dev);
1059
1060 return err;
1061 }
1062
1063 static void team_port_leave(struct team *team, struct team_port *port)
1064 {
1065 if (team->ops.port_leave)
1066 team->ops.port_leave(team, port);
1067 dev_put(team->dev);
1068 }
1069
1070 #ifdef CONFIG_NET_POLL_CONTROLLER
1071 static int __team_port_enable_netpoll(struct team_port *port)
1072 {
1073 struct netpoll *np;
1074 int err;
1075
1076 np = kzalloc(sizeof(*np), GFP_KERNEL);
1077 if (!np)
1078 return -ENOMEM;
1079
1080 err = __netpoll_setup(np, port->dev);
1081 if (err) {
1082 kfree(np);
1083 return err;
1084 }
1085 port->np = np;
1086 return err;
1087 }
1088
1089 static int team_port_enable_netpoll(struct team_port *port)
1090 {
1091 if (!port->team->dev->npinfo)
1092 return 0;
1093
1094 return __team_port_enable_netpoll(port);
1095 }
1096
1097 static void team_port_disable_netpoll(struct team_port *port)
1098 {
1099 struct netpoll *np = port->np;
1100
1101 if (!np)
1102 return;
1103 port->np = NULL;
1104
1105 __netpoll_free(np);
1106 }
1107 #else
1108 static int team_port_enable_netpoll(struct team_port *port)
1109 {
1110 return 0;
1111 }
1112 static void team_port_disable_netpoll(struct team_port *port)
1113 {
1114 }
1115 #endif
1116
1117 static int team_upper_dev_link(struct team *team, struct team_port *port,
1118 struct netlink_ext_ack *extack)
1119 {
1120 struct netdev_lag_upper_info lag_upper_info;
1121 int err;
1122
1123 lag_upper_info.tx_type = team->mode->lag_tx_type;
1124 lag_upper_info.hash_type = NETDEV_LAG_HASH_UNKNOWN;
1125 err = netdev_master_upper_dev_link(port->dev, team->dev, NULL,
1126 &lag_upper_info, extack);
1127 if (err)
1128 return err;
1129 port->dev->priv_flags |= IFF_TEAM_PORT;
1130 return 0;
1131 }
1132
1133 static void team_upper_dev_unlink(struct team *team, struct team_port *port)
1134 {
1135 netdev_upper_dev_unlink(port->dev, team->dev);
1136 port->dev->priv_flags &= ~IFF_TEAM_PORT;
1137 }
1138
1139 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1140 static int team_dev_type_check_change(struct net_device *dev,
1141 struct net_device *port_dev);
1142
1143 static int team_port_add(struct team *team, struct net_device *port_dev,
1144 struct netlink_ext_ack *extack)
1145 {
1146 struct net_device *dev = team->dev;
1147 struct team_port *port;
1148 char *portname = port_dev->name;
1149 int err;
1150
1151 if (port_dev->flags & IFF_LOOPBACK) {
1152 NL_SET_ERR_MSG(extack, "Loopback device can't be added as a team port");
1153 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1154 portname);
1155 return -EINVAL;
1156 }
1157
1158 if (team_port_exists(port_dev)) {
1159 NL_SET_ERR_MSG(extack, "Device is already a port of a team device");
1160 netdev_err(dev, "Device %s is already a port "
1161 "of a team device\n", portname);
1162 return -EBUSY;
1163 }
1164
1165 if (dev == port_dev) {
1166 NL_SET_ERR_MSG(extack, "Cannot enslave team device to itself");
1167 netdev_err(dev, "Cannot enslave team device to itself\n");
1168 return -EINVAL;
1169 }
1170
1171 if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1172 vlan_uses_dev(dev)) {
1173 NL_SET_ERR_MSG(extack, "Device is VLAN challenged and team device has VLAN set up");
1174 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1175 portname);
1176 return -EPERM;
1177 }
1178
1179 err = team_dev_type_check_change(dev, port_dev);
1180 if (err)
1181 return err;
1182
1183 if (port_dev->flags & IFF_UP) {
1184 NL_SET_ERR_MSG(extack, "Device is up. Set it down before adding it as a team port");
1185 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1186 portname);
1187 return -EBUSY;
1188 }
1189
1190 port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1191 GFP_KERNEL);
1192 if (!port)
1193 return -ENOMEM;
1194
1195 port->dev = port_dev;
1196 port->team = team;
1197 INIT_LIST_HEAD(&port->qom_list);
1198
1199 port->orig.mtu = port_dev->mtu;
1200 err = dev_set_mtu(port_dev, dev->mtu);
1201 if (err) {
1202 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1203 goto err_set_mtu;
1204 }
1205
1206 memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1207
1208 err = team_port_enter(team, port);
1209 if (err) {
1210 netdev_err(dev, "Device %s failed to enter team mode\n",
1211 portname);
1212 goto err_port_enter;
1213 }
1214
1215 err = dev_open(port_dev, extack);
1216 if (err) {
1217 netdev_dbg(dev, "Device %s opening failed\n",
1218 portname);
1219 goto err_dev_open;
1220 }
1221
1222 err = vlan_vids_add_by_dev(port_dev, dev);
1223 if (err) {
1224 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1225 portname);
1226 goto err_vids_add;
1227 }
1228
1229 err = team_port_enable_netpoll(port);
1230 if (err) {
1231 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1232 portname);
1233 goto err_enable_netpoll;
1234 }
1235
1236 if (!(dev->features & NETIF_F_LRO))
1237 dev_disable_lro(port_dev);
1238
1239 err = netdev_rx_handler_register(port_dev, team_handle_frame,
1240 port);
1241 if (err) {
1242 netdev_err(dev, "Device %s failed to register rx_handler\n",
1243 portname);
1244 goto err_handler_register;
1245 }
1246
1247 err = team_upper_dev_link(team, port, extack);
1248 if (err) {
1249 netdev_err(dev, "Device %s failed to set upper link\n",
1250 portname);
1251 goto err_set_upper_link;
1252 }
1253
1254 err = __team_option_inst_add_port(team, port);
1255 if (err) {
1256 netdev_err(dev, "Device %s failed to add per-port options\n",
1257 portname);
1258 goto err_option_port_add;
1259 }
1260
1261 netif_addr_lock_bh(dev);
1262 dev_uc_sync_multiple(port_dev, dev);
1263 dev_mc_sync_multiple(port_dev, dev);
1264 netif_addr_unlock_bh(dev);
1265
1266 port->index = -1;
1267 list_add_tail_rcu(&port->list, &team->port_list);
1268 team_port_enable(team, port);
1269 __team_compute_features(team);
1270 __team_port_change_port_added(port, !!netif_carrier_ok(port_dev));
1271 __team_options_change_check(team);
1272
1273 netdev_info(dev, "Port device %s added\n", portname);
1274
1275 return 0;
1276
1277 err_option_port_add:
1278 team_upper_dev_unlink(team, port);
1279
1280 err_set_upper_link:
1281 netdev_rx_handler_unregister(port_dev);
1282
1283 err_handler_register:
1284 team_port_disable_netpoll(port);
1285
1286 err_enable_netpoll:
1287 vlan_vids_del_by_dev(port_dev, dev);
1288
1289 err_vids_add:
1290 dev_close(port_dev);
1291
1292 err_dev_open:
1293 team_port_leave(team, port);
1294 team_port_set_orig_dev_addr(port);
1295
1296 err_port_enter:
1297 dev_set_mtu(port_dev, port->orig.mtu);
1298
1299 err_set_mtu:
1300 kfree(port);
1301
1302 return err;
1303 }
1304
1305 static void __team_port_change_port_removed(struct team_port *port);
1306
1307 static int team_port_del(struct team *team, struct net_device *port_dev)
1308 {
1309 struct net_device *dev = team->dev;
1310 struct team_port *port;
1311 char *portname = port_dev->name;
1312
1313 port = team_port_get_rtnl(port_dev);
1314 if (!port || !team_port_find(team, port)) {
1315 netdev_err(dev, "Device %s does not act as a port of this team\n",
1316 portname);
1317 return -ENOENT;
1318 }
1319
1320 team_port_disable(team, port);
1321 list_del_rcu(&port->list);
1322 team_upper_dev_unlink(team, port);
1323 netdev_rx_handler_unregister(port_dev);
1324 team_port_disable_netpoll(port);
1325 vlan_vids_del_by_dev(port_dev, dev);
1326 dev_uc_unsync(port_dev, dev);
1327 dev_mc_unsync(port_dev, dev);
1328 dev_close(port_dev);
1329 team_port_leave(team, port);
1330
1331 __team_option_inst_mark_removed_port(team, port);
1332 __team_options_change_check(team);
1333 __team_option_inst_del_port(team, port);
1334 __team_port_change_port_removed(port);
1335
1336 team_port_set_orig_dev_addr(port);
1337 dev_set_mtu(port_dev, port->orig.mtu);
1338 kfree_rcu(port, rcu);
1339 netdev_info(dev, "Port device %s removed\n", portname);
1340 __team_compute_features(team);
1341
1342 return 0;
1343 }
1344
1345
1346 /*****************
1347 * Net device ops
1348 *****************/
1349
1350 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1351 {
1352 ctx->data.str_val = team->mode->kind;
1353 return 0;
1354 }
1355
1356 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1357 {
1358 return team_change_mode(team, ctx->data.str_val);
1359 }
1360
1361 static int team_notify_peers_count_get(struct team *team,
1362 struct team_gsetter_ctx *ctx)
1363 {
1364 ctx->data.u32_val = team->notify_peers.count;
1365 return 0;
1366 }
1367
1368 static int team_notify_peers_count_set(struct team *team,
1369 struct team_gsetter_ctx *ctx)
1370 {
1371 team->notify_peers.count = ctx->data.u32_val;
1372 return 0;
1373 }
1374
1375 static int team_notify_peers_interval_get(struct team *team,
1376 struct team_gsetter_ctx *ctx)
1377 {
1378 ctx->data.u32_val = team->notify_peers.interval;
1379 return 0;
1380 }
1381
1382 static int team_notify_peers_interval_set(struct team *team,
1383 struct team_gsetter_ctx *ctx)
1384 {
1385 team->notify_peers.interval = ctx->data.u32_val;
1386 return 0;
1387 }
1388
1389 static int team_mcast_rejoin_count_get(struct team *team,
1390 struct team_gsetter_ctx *ctx)
1391 {
1392 ctx->data.u32_val = team->mcast_rejoin.count;
1393 return 0;
1394 }
1395
1396 static int team_mcast_rejoin_count_set(struct team *team,
1397 struct team_gsetter_ctx *ctx)
1398 {
1399 team->mcast_rejoin.count = ctx->data.u32_val;
1400 return 0;
1401 }
1402
1403 static int team_mcast_rejoin_interval_get(struct team *team,
1404 struct team_gsetter_ctx *ctx)
1405 {
1406 ctx->data.u32_val = team->mcast_rejoin.interval;
1407 return 0;
1408 }
1409
1410 static int team_mcast_rejoin_interval_set(struct team *team,
1411 struct team_gsetter_ctx *ctx)
1412 {
1413 team->mcast_rejoin.interval = ctx->data.u32_val;
1414 return 0;
1415 }
1416
1417 static int team_port_en_option_get(struct team *team,
1418 struct team_gsetter_ctx *ctx)
1419 {
1420 struct team_port *port = ctx->info->port;
1421
1422 ctx->data.bool_val = team_port_enabled(port);
1423 return 0;
1424 }
1425
1426 static int team_port_en_option_set(struct team *team,
1427 struct team_gsetter_ctx *ctx)
1428 {
1429 struct team_port *port = ctx->info->port;
1430
1431 if (ctx->data.bool_val)
1432 team_port_enable(team, port);
1433 else
1434 team_port_disable(team, port);
1435 return 0;
1436 }
1437
1438 static int team_user_linkup_option_get(struct team *team,
1439 struct team_gsetter_ctx *ctx)
1440 {
1441 struct team_port *port = ctx->info->port;
1442
1443 ctx->data.bool_val = port->user.linkup;
1444 return 0;
1445 }
1446
1447 static void __team_carrier_check(struct team *team);
1448
1449 static int team_user_linkup_option_set(struct team *team,
1450 struct team_gsetter_ctx *ctx)
1451 {
1452 struct team_port *port = ctx->info->port;
1453
1454 port->user.linkup = ctx->data.bool_val;
1455 team_refresh_port_linkup(port);
1456 __team_carrier_check(port->team);
1457 return 0;
1458 }
1459
1460 static int team_user_linkup_en_option_get(struct team *team,
1461 struct team_gsetter_ctx *ctx)
1462 {
1463 struct team_port *port = ctx->info->port;
1464
1465 ctx->data.bool_val = port->user.linkup_enabled;
1466 return 0;
1467 }
1468
1469 static int team_user_linkup_en_option_set(struct team *team,
1470 struct team_gsetter_ctx *ctx)
1471 {
1472 struct team_port *port = ctx->info->port;
1473
1474 port->user.linkup_enabled = ctx->data.bool_val;
1475 team_refresh_port_linkup(port);
1476 __team_carrier_check(port->team);
1477 return 0;
1478 }
1479
1480 static int team_priority_option_get(struct team *team,
1481 struct team_gsetter_ctx *ctx)
1482 {
1483 struct team_port *port = ctx->info->port;
1484
1485 ctx->data.s32_val = port->priority;
1486 return 0;
1487 }
1488
1489 static int team_priority_option_set(struct team *team,
1490 struct team_gsetter_ctx *ctx)
1491 {
1492 struct team_port *port = ctx->info->port;
1493 s32 priority = ctx->data.s32_val;
1494
1495 if (port->priority == priority)
1496 return 0;
1497 port->priority = priority;
1498 team_queue_override_port_prio_changed(team, port);
1499 return 0;
1500 }
1501
1502 static int team_queue_id_option_get(struct team *team,
1503 struct team_gsetter_ctx *ctx)
1504 {
1505 struct team_port *port = ctx->info->port;
1506
1507 ctx->data.u32_val = port->queue_id;
1508 return 0;
1509 }
1510
1511 static int team_queue_id_option_set(struct team *team,
1512 struct team_gsetter_ctx *ctx)
1513 {
1514 struct team_port *port = ctx->info->port;
1515 u16 new_queue_id = ctx->data.u32_val;
1516
1517 if (port->queue_id == new_queue_id)
1518 return 0;
1519 if (new_queue_id >= team->dev->real_num_tx_queues)
1520 return -EINVAL;
1521 team_queue_override_port_change_queue_id(team, port, new_queue_id);
1522 return 0;
1523 }
1524
1525 static const struct team_option team_options[] = {
1526 {
1527 .name = "mode",
1528 .type = TEAM_OPTION_TYPE_STRING,
1529 .getter = team_mode_option_get,
1530 .setter = team_mode_option_set,
1531 },
1532 {
1533 .name = "notify_peers_count",
1534 .type = TEAM_OPTION_TYPE_U32,
1535 .getter = team_notify_peers_count_get,
1536 .setter = team_notify_peers_count_set,
1537 },
1538 {
1539 .name = "notify_peers_interval",
1540 .type = TEAM_OPTION_TYPE_U32,
1541 .getter = team_notify_peers_interval_get,
1542 .setter = team_notify_peers_interval_set,
1543 },
1544 {
1545 .name = "mcast_rejoin_count",
1546 .type = TEAM_OPTION_TYPE_U32,
1547 .getter = team_mcast_rejoin_count_get,
1548 .setter = team_mcast_rejoin_count_set,
1549 },
1550 {
1551 .name = "mcast_rejoin_interval",
1552 .type = TEAM_OPTION_TYPE_U32,
1553 .getter = team_mcast_rejoin_interval_get,
1554 .setter = team_mcast_rejoin_interval_set,
1555 },
1556 {
1557 .name = "enabled",
1558 .type = TEAM_OPTION_TYPE_BOOL,
1559 .per_port = true,
1560 .getter = team_port_en_option_get,
1561 .setter = team_port_en_option_set,
1562 },
1563 {
1564 .name = "user_linkup",
1565 .type = TEAM_OPTION_TYPE_BOOL,
1566 .per_port = true,
1567 .getter = team_user_linkup_option_get,
1568 .setter = team_user_linkup_option_set,
1569 },
1570 {
1571 .name = "user_linkup_enabled",
1572 .type = TEAM_OPTION_TYPE_BOOL,
1573 .per_port = true,
1574 .getter = team_user_linkup_en_option_get,
1575 .setter = team_user_linkup_en_option_set,
1576 },
1577 {
1578 .name = "priority",
1579 .type = TEAM_OPTION_TYPE_S32,
1580 .per_port = true,
1581 .getter = team_priority_option_get,
1582 .setter = team_priority_option_set,
1583 },
1584 {
1585 .name = "queue_id",
1586 .type = TEAM_OPTION_TYPE_U32,
1587 .per_port = true,
1588 .getter = team_queue_id_option_get,
1589 .setter = team_queue_id_option_set,
1590 },
1591 };
1592
1593
1594 static int team_init(struct net_device *dev)
1595 {
1596 struct team *team = netdev_priv(dev);
1597 int i;
1598 int err;
1599
1600 team->dev = dev;
1601 mutex_init(&team->lock);
1602 team_set_no_mode(team);
1603
1604 team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1605 if (!team->pcpu_stats)
1606 return -ENOMEM;
1607
1608 for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1609 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1610 INIT_LIST_HEAD(&team->port_list);
1611 err = team_queue_override_init(team);
1612 if (err)
1613 goto err_team_queue_override_init;
1614
1615 team_adjust_ops(team);
1616
1617 INIT_LIST_HEAD(&team->option_list);
1618 INIT_LIST_HEAD(&team->option_inst_list);
1619
1620 team_notify_peers_init(team);
1621 team_mcast_rejoin_init(team);
1622
1623 err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1624 if (err)
1625 goto err_options_register;
1626 netif_carrier_off(dev);
1627
1628 netdev_lockdep_set_classes(dev);
1629
1630 return 0;
1631
1632 err_options_register:
1633 team_mcast_rejoin_fini(team);
1634 team_notify_peers_fini(team);
1635 team_queue_override_fini(team);
1636 err_team_queue_override_init:
1637 free_percpu(team->pcpu_stats);
1638
1639 return err;
1640 }
1641
1642 static void team_uninit(struct net_device *dev)
1643 {
1644 struct team *team = netdev_priv(dev);
1645 struct team_port *port;
1646 struct team_port *tmp;
1647
1648 mutex_lock(&team->lock);
1649 list_for_each_entry_safe(port, tmp, &team->port_list, list)
1650 team_port_del(team, port->dev);
1651
1652 __team_change_mode(team, NULL); /* cleanup */
1653 __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1654 team_mcast_rejoin_fini(team);
1655 team_notify_peers_fini(team);
1656 team_queue_override_fini(team);
1657 mutex_unlock(&team->lock);
1658 netdev_change_features(dev);
1659 }
1660
1661 static void team_destructor(struct net_device *dev)
1662 {
1663 struct team *team = netdev_priv(dev);
1664
1665 free_percpu(team->pcpu_stats);
1666 }
1667
1668 static int team_open(struct net_device *dev)
1669 {
1670 return 0;
1671 }
1672
1673 static int team_close(struct net_device *dev)
1674 {
1675 return 0;
1676 }
1677
1678 /*
1679 * note: already called with rcu_read_lock
1680 */
1681 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1682 {
1683 struct team *team = netdev_priv(dev);
1684 bool tx_success;
1685 unsigned int len = skb->len;
1686
1687 tx_success = team_queue_override_transmit(team, skb);
1688 if (!tx_success)
1689 tx_success = team->ops.transmit(team, skb);
1690 if (tx_success) {
1691 struct team_pcpu_stats *pcpu_stats;
1692
1693 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1694 u64_stats_update_begin(&pcpu_stats->syncp);
1695 pcpu_stats->tx_packets++;
1696 pcpu_stats->tx_bytes += len;
1697 u64_stats_update_end(&pcpu_stats->syncp);
1698 } else {
1699 this_cpu_inc(team->pcpu_stats->tx_dropped);
1700 }
1701
1702 return NETDEV_TX_OK;
1703 }
1704
1705 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1706 struct net_device *sb_dev,
1707 select_queue_fallback_t fallback)
1708 {
1709 /*
1710 * This helper function exists to help dev_pick_tx get the correct
1711 * destination queue. Using a helper function skips a call to
1712 * skb_tx_hash and will put the skbs in the queue we expect on their
1713 * way down to the team driver.
1714 */
1715 u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1716
1717 /*
1718 * Save the original txq to restore before passing to the driver
1719 */
1720 qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1721
1722 if (unlikely(txq >= dev->real_num_tx_queues)) {
1723 do {
1724 txq -= dev->real_num_tx_queues;
1725 } while (txq >= dev->real_num_tx_queues);
1726 }
1727 return txq;
1728 }
1729
1730 static void team_change_rx_flags(struct net_device *dev, int change)
1731 {
1732 struct team *team = netdev_priv(dev);
1733 struct team_port *port;
1734 int inc;
1735
1736 rcu_read_lock();
1737 list_for_each_entry_rcu(port, &team->port_list, list) {
1738 if (change & IFF_PROMISC) {
1739 inc = dev->flags & IFF_PROMISC ? 1 : -1;
1740 dev_set_promiscuity(port->dev, inc);
1741 }
1742 if (change & IFF_ALLMULTI) {
1743 inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1744 dev_set_allmulti(port->dev, inc);
1745 }
1746 }
1747 rcu_read_unlock();
1748 }
1749
1750 static void team_set_rx_mode(struct net_device *dev)
1751 {
1752 struct team *team = netdev_priv(dev);
1753 struct team_port *port;
1754
1755 rcu_read_lock();
1756 list_for_each_entry_rcu(port, &team->port_list, list) {
1757 dev_uc_sync_multiple(port->dev, dev);
1758 dev_mc_sync_multiple(port->dev, dev);
1759 }
1760 rcu_read_unlock();
1761 }
1762
1763 static int team_set_mac_address(struct net_device *dev, void *p)
1764 {
1765 struct sockaddr *addr = p;
1766 struct team *team = netdev_priv(dev);
1767 struct team_port *port;
1768
1769 if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1770 return -EADDRNOTAVAIL;
1771 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1772 mutex_lock(&team->lock);
1773 list_for_each_entry(port, &team->port_list, list)
1774 if (team->ops.port_change_dev_addr)
1775 team->ops.port_change_dev_addr(team, port);
1776 mutex_unlock(&team->lock);
1777 return 0;
1778 }
1779
1780 static int team_change_mtu(struct net_device *dev, int new_mtu)
1781 {
1782 struct team *team = netdev_priv(dev);
1783 struct team_port *port;
1784 int err;
1785
1786 /*
1787 * Alhough this is reader, it's guarded by team lock. It's not possible
1788 * to traverse list in reverse under rcu_read_lock
1789 */
1790 mutex_lock(&team->lock);
1791 team->port_mtu_change_allowed = true;
1792 list_for_each_entry(port, &team->port_list, list) {
1793 err = dev_set_mtu(port->dev, new_mtu);
1794 if (err) {
1795 netdev_err(dev, "Device %s failed to change mtu",
1796 port->dev->name);
1797 goto unwind;
1798 }
1799 }
1800 team->port_mtu_change_allowed = false;
1801 mutex_unlock(&team->lock);
1802
1803 dev->mtu = new_mtu;
1804
1805 return 0;
1806
1807 unwind:
1808 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1809 dev_set_mtu(port->dev, dev->mtu);
1810 team->port_mtu_change_allowed = false;
1811 mutex_unlock(&team->lock);
1812
1813 return err;
1814 }
1815
1816 static void
1817 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1818 {
1819 struct team *team = netdev_priv(dev);
1820 struct team_pcpu_stats *p;
1821 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1822 u32 rx_dropped = 0, tx_dropped = 0, rx_nohandler = 0;
1823 unsigned int start;
1824 int i;
1825
1826 for_each_possible_cpu(i) {
1827 p = per_cpu_ptr(team->pcpu_stats, i);
1828 do {
1829 start = u64_stats_fetch_begin_irq(&p->syncp);
1830 rx_packets = p->rx_packets;
1831 rx_bytes = p->rx_bytes;
1832 rx_multicast = p->rx_multicast;
1833 tx_packets = p->tx_packets;
1834 tx_bytes = p->tx_bytes;
1835 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
1836
1837 stats->rx_packets += rx_packets;
1838 stats->rx_bytes += rx_bytes;
1839 stats->multicast += rx_multicast;
1840 stats->tx_packets += tx_packets;
1841 stats->tx_bytes += tx_bytes;
1842 /*
1843 * rx_dropped, tx_dropped & rx_nohandler are u32,
1844 * updated without syncp protection.
1845 */
1846 rx_dropped += p->rx_dropped;
1847 tx_dropped += p->tx_dropped;
1848 rx_nohandler += p->rx_nohandler;
1849 }
1850 stats->rx_dropped = rx_dropped;
1851 stats->tx_dropped = tx_dropped;
1852 stats->rx_nohandler = rx_nohandler;
1853 }
1854
1855 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1856 {
1857 struct team *team = netdev_priv(dev);
1858 struct team_port *port;
1859 int err;
1860
1861 /*
1862 * Alhough this is reader, it's guarded by team lock. It's not possible
1863 * to traverse list in reverse under rcu_read_lock
1864 */
1865 mutex_lock(&team->lock);
1866 list_for_each_entry(port, &team->port_list, list) {
1867 err = vlan_vid_add(port->dev, proto, vid);
1868 if (err)
1869 goto unwind;
1870 }
1871 mutex_unlock(&team->lock);
1872
1873 return 0;
1874
1875 unwind:
1876 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1877 vlan_vid_del(port->dev, proto, vid);
1878 mutex_unlock(&team->lock);
1879
1880 return err;
1881 }
1882
1883 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1884 {
1885 struct team *team = netdev_priv(dev);
1886 struct team_port *port;
1887
1888 mutex_lock(&team->lock);
1889 list_for_each_entry(port, &team->port_list, list)
1890 vlan_vid_del(port->dev, proto, vid);
1891 mutex_unlock(&team->lock);
1892
1893 return 0;
1894 }
1895
1896 #ifdef CONFIG_NET_POLL_CONTROLLER
1897 static void team_poll_controller(struct net_device *dev)
1898 {
1899 }
1900
1901 static void __team_netpoll_cleanup(struct team *team)
1902 {
1903 struct team_port *port;
1904
1905 list_for_each_entry(port, &team->port_list, list)
1906 team_port_disable_netpoll(port);
1907 }
1908
1909 static void team_netpoll_cleanup(struct net_device *dev)
1910 {
1911 struct team *team = netdev_priv(dev);
1912
1913 mutex_lock(&team->lock);
1914 __team_netpoll_cleanup(team);
1915 mutex_unlock(&team->lock);
1916 }
1917
1918 static int team_netpoll_setup(struct net_device *dev,
1919 struct netpoll_info *npifo)
1920 {
1921 struct team *team = netdev_priv(dev);
1922 struct team_port *port;
1923 int err = 0;
1924
1925 mutex_lock(&team->lock);
1926 list_for_each_entry(port, &team->port_list, list) {
1927 err = __team_port_enable_netpoll(port);
1928 if (err) {
1929 __team_netpoll_cleanup(team);
1930 break;
1931 }
1932 }
1933 mutex_unlock(&team->lock);
1934 return err;
1935 }
1936 #endif
1937
1938 static int team_add_slave(struct net_device *dev, struct net_device *port_dev,
1939 struct netlink_ext_ack *extack)
1940 {
1941 struct team *team = netdev_priv(dev);
1942 int err;
1943
1944 mutex_lock(&team->lock);
1945 err = team_port_add(team, port_dev, extack);
1946 mutex_unlock(&team->lock);
1947
1948 if (!err)
1949 netdev_change_features(dev);
1950
1951 return err;
1952 }
1953
1954 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1955 {
1956 struct team *team = netdev_priv(dev);
1957 int err;
1958
1959 mutex_lock(&team->lock);
1960 err = team_port_del(team, port_dev);
1961 mutex_unlock(&team->lock);
1962
1963 if (!err)
1964 netdev_change_features(dev);
1965
1966 return err;
1967 }
1968
1969 static netdev_features_t team_fix_features(struct net_device *dev,
1970 netdev_features_t features)
1971 {
1972 struct team_port *port;
1973 struct team *team = netdev_priv(dev);
1974 netdev_features_t mask;
1975
1976 mask = features;
1977 features &= ~NETIF_F_ONE_FOR_ALL;
1978 features |= NETIF_F_ALL_FOR_ALL;
1979
1980 rcu_read_lock();
1981 list_for_each_entry_rcu(port, &team->port_list, list) {
1982 features = netdev_increment_features(features,
1983 port->dev->features,
1984 mask);
1985 }
1986 rcu_read_unlock();
1987
1988 features = netdev_add_tso_features(features, mask);
1989
1990 return features;
1991 }
1992
1993 static int team_change_carrier(struct net_device *dev, bool new_carrier)
1994 {
1995 struct team *team = netdev_priv(dev);
1996
1997 team->user_carrier_enabled = true;
1998
1999 if (new_carrier)
2000 netif_carrier_on(dev);
2001 else
2002 netif_carrier_off(dev);
2003 return 0;
2004 }
2005
2006 static const struct net_device_ops team_netdev_ops = {
2007 .ndo_init = team_init,
2008 .ndo_uninit = team_uninit,
2009 .ndo_open = team_open,
2010 .ndo_stop = team_close,
2011 .ndo_start_xmit = team_xmit,
2012 .ndo_select_queue = team_select_queue,
2013 .ndo_change_rx_flags = team_change_rx_flags,
2014 .ndo_set_rx_mode = team_set_rx_mode,
2015 .ndo_set_mac_address = team_set_mac_address,
2016 .ndo_change_mtu = team_change_mtu,
2017 .ndo_get_stats64 = team_get_stats64,
2018 .ndo_vlan_rx_add_vid = team_vlan_rx_add_vid,
2019 .ndo_vlan_rx_kill_vid = team_vlan_rx_kill_vid,
2020 #ifdef CONFIG_NET_POLL_CONTROLLER
2021 .ndo_poll_controller = team_poll_controller,
2022 .ndo_netpoll_setup = team_netpoll_setup,
2023 .ndo_netpoll_cleanup = team_netpoll_cleanup,
2024 #endif
2025 .ndo_add_slave = team_add_slave,
2026 .ndo_del_slave = team_del_slave,
2027 .ndo_fix_features = team_fix_features,
2028 .ndo_change_carrier = team_change_carrier,
2029 .ndo_features_check = passthru_features_check,
2030 };
2031
2032 /***********************
2033 * ethtool interface
2034 ***********************/
2035
2036 static void team_ethtool_get_drvinfo(struct net_device *dev,
2037 struct ethtool_drvinfo *drvinfo)
2038 {
2039 strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
2040 strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2041 }
2042
2043 static const struct ethtool_ops team_ethtool_ops = {
2044 .get_drvinfo = team_ethtool_get_drvinfo,
2045 .get_link = ethtool_op_get_link,
2046 };
2047
2048 /***********************
2049 * rt netlink interface
2050 ***********************/
2051
2052 static void team_setup_by_port(struct net_device *dev,
2053 struct net_device *port_dev)
2054 {
2055 dev->header_ops = port_dev->header_ops;
2056 dev->type = port_dev->type;
2057 dev->hard_header_len = port_dev->hard_header_len;
2058 dev->addr_len = port_dev->addr_len;
2059 dev->mtu = port_dev->mtu;
2060 memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2061 eth_hw_addr_inherit(dev, port_dev);
2062 }
2063
2064 static int team_dev_type_check_change(struct net_device *dev,
2065 struct net_device *port_dev)
2066 {
2067 struct team *team = netdev_priv(dev);
2068 char *portname = port_dev->name;
2069 int err;
2070
2071 if (dev->type == port_dev->type)
2072 return 0;
2073 if (!list_empty(&team->port_list)) {
2074 netdev_err(dev, "Device %s is of different type\n", portname);
2075 return -EBUSY;
2076 }
2077 err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2078 err = notifier_to_errno(err);
2079 if (err) {
2080 netdev_err(dev, "Refused to change device type\n");
2081 return err;
2082 }
2083 dev_uc_flush(dev);
2084 dev_mc_flush(dev);
2085 team_setup_by_port(dev, port_dev);
2086 call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2087 return 0;
2088 }
2089
2090 static void team_setup(struct net_device *dev)
2091 {
2092 ether_setup(dev);
2093 dev->max_mtu = ETH_MAX_MTU;
2094
2095 dev->netdev_ops = &team_netdev_ops;
2096 dev->ethtool_ops = &team_ethtool_ops;
2097 dev->needs_free_netdev = true;
2098 dev->priv_destructor = team_destructor;
2099 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2100 dev->priv_flags |= IFF_NO_QUEUE;
2101 dev->priv_flags |= IFF_TEAM;
2102
2103 /*
2104 * Indicate we support unicast address filtering. That way core won't
2105 * bring us to promisc mode in case a unicast addr is added.
2106 * Let this up to underlay drivers.
2107 */
2108 dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2109
2110 dev->features |= NETIF_F_LLTX;
2111 dev->features |= NETIF_F_GRO;
2112
2113 /* Don't allow team devices to change network namespaces. */
2114 dev->features |= NETIF_F_NETNS_LOCAL;
2115
2116 dev->hw_features = TEAM_VLAN_FEATURES |
2117 NETIF_F_HW_VLAN_CTAG_TX |
2118 NETIF_F_HW_VLAN_CTAG_RX |
2119 NETIF_F_HW_VLAN_CTAG_FILTER;
2120
2121 dev->hw_features |= NETIF_F_GSO_ENCAP_ALL | NETIF_F_GSO_UDP_L4;
2122 dev->features |= dev->hw_features;
2123 }
2124
2125 static int team_newlink(struct net *src_net, struct net_device *dev,
2126 struct nlattr *tb[], struct nlattr *data[],
2127 struct netlink_ext_ack *extack)
2128 {
2129 if (tb[IFLA_ADDRESS] == NULL)
2130 eth_hw_addr_random(dev);
2131
2132 return register_netdevice(dev);
2133 }
2134
2135 static int team_validate(struct nlattr *tb[], struct nlattr *data[],
2136 struct netlink_ext_ack *extack)
2137 {
2138 if (tb[IFLA_ADDRESS]) {
2139 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2140 return -EINVAL;
2141 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2142 return -EADDRNOTAVAIL;
2143 }
2144 return 0;
2145 }
2146
2147 static unsigned int team_get_num_tx_queues(void)
2148 {
2149 return TEAM_DEFAULT_NUM_TX_QUEUES;
2150 }
2151
2152 static unsigned int team_get_num_rx_queues(void)
2153 {
2154 return TEAM_DEFAULT_NUM_RX_QUEUES;
2155 }
2156
2157 static struct rtnl_link_ops team_link_ops __read_mostly = {
2158 .kind = DRV_NAME,
2159 .priv_size = sizeof(struct team),
2160 .setup = team_setup,
2161 .newlink = team_newlink,
2162 .validate = team_validate,
2163 .get_num_tx_queues = team_get_num_tx_queues,
2164 .get_num_rx_queues = team_get_num_rx_queues,
2165 };
2166
2167
2168 /***********************************
2169 * Generic netlink custom interface
2170 ***********************************/
2171
2172 static struct genl_family team_nl_family;
2173
2174 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2175 [TEAM_ATTR_UNSPEC] = { .type = NLA_UNSPEC, },
2176 [TEAM_ATTR_TEAM_IFINDEX] = { .type = NLA_U32 },
2177 [TEAM_ATTR_LIST_OPTION] = { .type = NLA_NESTED },
2178 [TEAM_ATTR_LIST_PORT] = { .type = NLA_NESTED },
2179 };
2180
2181 static const struct nla_policy
2182 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2183 [TEAM_ATTR_OPTION_UNSPEC] = { .type = NLA_UNSPEC, },
2184 [TEAM_ATTR_OPTION_NAME] = {
2185 .type = NLA_STRING,
2186 .len = TEAM_STRING_MAX_LEN,
2187 },
2188 [TEAM_ATTR_OPTION_CHANGED] = { .type = NLA_FLAG },
2189 [TEAM_ATTR_OPTION_TYPE] = { .type = NLA_U8 },
2190 [TEAM_ATTR_OPTION_DATA] = { .type = NLA_BINARY },
2191 };
2192
2193 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2194 {
2195 struct sk_buff *msg;
2196 void *hdr;
2197 int err;
2198
2199 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2200 if (!msg)
2201 return -ENOMEM;
2202
2203 hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2204 &team_nl_family, 0, TEAM_CMD_NOOP);
2205 if (!hdr) {
2206 err = -EMSGSIZE;
2207 goto err_msg_put;
2208 }
2209
2210 genlmsg_end(msg, hdr);
2211
2212 return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2213
2214 err_msg_put:
2215 nlmsg_free(msg);
2216
2217 return err;
2218 }
2219
2220 /*
2221 * Netlink cmd functions should be locked by following two functions.
2222 * Since dev gets held here, that ensures dev won't disappear in between.
2223 */
2224 static struct team *team_nl_team_get(struct genl_info *info)
2225 {
2226 struct net *net = genl_info_net(info);
2227 int ifindex;
2228 struct net_device *dev;
2229 struct team *team;
2230
2231 if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2232 return NULL;
2233
2234 ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2235 dev = dev_get_by_index(net, ifindex);
2236 if (!dev || dev->netdev_ops != &team_netdev_ops) {
2237 if (dev)
2238 dev_put(dev);
2239 return NULL;
2240 }
2241
2242 team = netdev_priv(dev);
2243 mutex_lock(&team->lock);
2244 return team;
2245 }
2246
2247 static void team_nl_team_put(struct team *team)
2248 {
2249 mutex_unlock(&team->lock);
2250 dev_put(team->dev);
2251 }
2252
2253 typedef int team_nl_send_func_t(struct sk_buff *skb,
2254 struct team *team, u32 portid);
2255
2256 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2257 {
2258 return genlmsg_unicast(dev_net(team->dev), skb, portid);
2259 }
2260
2261 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2262 struct team_option_inst *opt_inst)
2263 {
2264 struct nlattr *option_item;
2265 struct team_option *option = opt_inst->option;
2266 struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2267 struct team_gsetter_ctx ctx;
2268 int err;
2269
2270 ctx.info = opt_inst_info;
2271 err = team_option_get(team, opt_inst, &ctx);
2272 if (err)
2273 return err;
2274
2275 option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
2276 if (!option_item)
2277 return -EMSGSIZE;
2278
2279 if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2280 goto nest_cancel;
2281 if (opt_inst_info->port &&
2282 nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2283 opt_inst_info->port->dev->ifindex))
2284 goto nest_cancel;
2285 if (opt_inst->option->array_size &&
2286 nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2287 opt_inst_info->array_index))
2288 goto nest_cancel;
2289
2290 switch (option->type) {
2291 case TEAM_OPTION_TYPE_U32:
2292 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2293 goto nest_cancel;
2294 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2295 goto nest_cancel;
2296 break;
2297 case TEAM_OPTION_TYPE_STRING:
2298 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2299 goto nest_cancel;
2300 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2301 ctx.data.str_val))
2302 goto nest_cancel;
2303 break;
2304 case TEAM_OPTION_TYPE_BINARY:
2305 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2306 goto nest_cancel;
2307 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2308 ctx.data.bin_val.ptr))
2309 goto nest_cancel;
2310 break;
2311 case TEAM_OPTION_TYPE_BOOL:
2312 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2313 goto nest_cancel;
2314 if (ctx.data.bool_val &&
2315 nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2316 goto nest_cancel;
2317 break;
2318 case TEAM_OPTION_TYPE_S32:
2319 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2320 goto nest_cancel;
2321 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2322 goto nest_cancel;
2323 break;
2324 default:
2325 BUG();
2326 }
2327 if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2328 goto nest_cancel;
2329 if (opt_inst->changed) {
2330 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2331 goto nest_cancel;
2332 opt_inst->changed = false;
2333 }
2334 nla_nest_end(skb, option_item);
2335 return 0;
2336
2337 nest_cancel:
2338 nla_nest_cancel(skb, option_item);
2339 return -EMSGSIZE;
2340 }
2341
2342 static int __send_and_alloc_skb(struct sk_buff **pskb,
2343 struct team *team, u32 portid,
2344 team_nl_send_func_t *send_func)
2345 {
2346 int err;
2347
2348 if (*pskb) {
2349 err = send_func(*pskb, team, portid);
2350 if (err)
2351 return err;
2352 }
2353 *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2354 if (!*pskb)
2355 return -ENOMEM;
2356 return 0;
2357 }
2358
2359 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2360 int flags, team_nl_send_func_t *send_func,
2361 struct list_head *sel_opt_inst_list)
2362 {
2363 struct nlattr *option_list;
2364 struct nlmsghdr *nlh;
2365 void *hdr;
2366 struct team_option_inst *opt_inst;
2367 int err;
2368 struct sk_buff *skb = NULL;
2369 bool incomplete;
2370 int i;
2371
2372 opt_inst = list_first_entry(sel_opt_inst_list,
2373 struct team_option_inst, tmp_list);
2374
2375 start_again:
2376 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2377 if (err)
2378 return err;
2379
2380 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2381 TEAM_CMD_OPTIONS_GET);
2382 if (!hdr) {
2383 nlmsg_free(skb);
2384 return -EMSGSIZE;
2385 }
2386
2387 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2388 goto nla_put_failure;
2389 option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2390 if (!option_list)
2391 goto nla_put_failure;
2392
2393 i = 0;
2394 incomplete = false;
2395 list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2396 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2397 if (err) {
2398 if (err == -EMSGSIZE) {
2399 if (!i)
2400 goto errout;
2401 incomplete = true;
2402 break;
2403 }
2404 goto errout;
2405 }
2406 i++;
2407 }
2408
2409 nla_nest_end(skb, option_list);
2410 genlmsg_end(skb, hdr);
2411 if (incomplete)
2412 goto start_again;
2413
2414 send_done:
2415 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2416 if (!nlh) {
2417 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2418 if (err)
2419 return err;
2420 goto send_done;
2421 }
2422
2423 return send_func(skb, team, portid);
2424
2425 nla_put_failure:
2426 err = -EMSGSIZE;
2427 errout:
2428 nlmsg_free(skb);
2429 return err;
2430 }
2431
2432 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2433 {
2434 struct team *team;
2435 struct team_option_inst *opt_inst;
2436 int err;
2437 LIST_HEAD(sel_opt_inst_list);
2438
2439 team = team_nl_team_get(info);
2440 if (!team)
2441 return -EINVAL;
2442
2443 list_for_each_entry(opt_inst, &team->option_inst_list, list)
2444 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2445 err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2446 NLM_F_ACK, team_nl_send_unicast,
2447 &sel_opt_inst_list);
2448
2449 team_nl_team_put(team);
2450
2451 return err;
2452 }
2453
2454 static int team_nl_send_event_options_get(struct team *team,
2455 struct list_head *sel_opt_inst_list);
2456
2457 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2458 {
2459 struct team *team;
2460 int err = 0;
2461 int i;
2462 struct nlattr *nl_option;
2463 LIST_HEAD(opt_inst_list);
2464
2465 rtnl_lock();
2466
2467 team = team_nl_team_get(info);
2468 if (!team) {
2469 err = -EINVAL;
2470 goto rtnl_unlock;
2471 }
2472
2473 err = -EINVAL;
2474 if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2475 err = -EINVAL;
2476 goto team_put;
2477 }
2478
2479 nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2480 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2481 struct nlattr *attr;
2482 struct nlattr *attr_data;
2483 enum team_option_type opt_type;
2484 int opt_port_ifindex = 0; /* != 0 for per-port options */
2485 u32 opt_array_index = 0;
2486 bool opt_is_array = false;
2487 struct team_option_inst *opt_inst;
2488 char *opt_name;
2489 bool opt_found = false;
2490
2491 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2492 err = -EINVAL;
2493 goto team_put;
2494 }
2495 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2496 nl_option, team_nl_option_policy,
2497 info->extack);
2498 if (err)
2499 goto team_put;
2500 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2501 !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2502 err = -EINVAL;
2503 goto team_put;
2504 }
2505 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2506 case NLA_U32:
2507 opt_type = TEAM_OPTION_TYPE_U32;
2508 break;
2509 case NLA_STRING:
2510 opt_type = TEAM_OPTION_TYPE_STRING;
2511 break;
2512 case NLA_BINARY:
2513 opt_type = TEAM_OPTION_TYPE_BINARY;
2514 break;
2515 case NLA_FLAG:
2516 opt_type = TEAM_OPTION_TYPE_BOOL;
2517 break;
2518 case NLA_S32:
2519 opt_type = TEAM_OPTION_TYPE_S32;
2520 break;
2521 default:
2522 goto team_put;
2523 }
2524
2525 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2526 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2527 err = -EINVAL;
2528 goto team_put;
2529 }
2530
2531 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2532 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2533 if (attr)
2534 opt_port_ifindex = nla_get_u32(attr);
2535
2536 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2537 if (attr) {
2538 opt_is_array = true;
2539 opt_array_index = nla_get_u32(attr);
2540 }
2541
2542 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2543 struct team_option *option = opt_inst->option;
2544 struct team_gsetter_ctx ctx;
2545 struct team_option_inst_info *opt_inst_info;
2546 int tmp_ifindex;
2547
2548 opt_inst_info = &opt_inst->info;
2549 tmp_ifindex = opt_inst_info->port ?
2550 opt_inst_info->port->dev->ifindex : 0;
2551 if (option->type != opt_type ||
2552 strcmp(option->name, opt_name) ||
2553 tmp_ifindex != opt_port_ifindex ||
2554 (option->array_size && !opt_is_array) ||
2555 opt_inst_info->array_index != opt_array_index)
2556 continue;
2557 opt_found = true;
2558 ctx.info = opt_inst_info;
2559 switch (opt_type) {
2560 case TEAM_OPTION_TYPE_U32:
2561 ctx.data.u32_val = nla_get_u32(attr_data);
2562 break;
2563 case TEAM_OPTION_TYPE_STRING:
2564 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2565 err = -EINVAL;
2566 goto team_put;
2567 }
2568 ctx.data.str_val = nla_data(attr_data);
2569 break;
2570 case TEAM_OPTION_TYPE_BINARY:
2571 ctx.data.bin_val.len = nla_len(attr_data);
2572 ctx.data.bin_val.ptr = nla_data(attr_data);
2573 break;
2574 case TEAM_OPTION_TYPE_BOOL:
2575 ctx.data.bool_val = attr_data ? true : false;
2576 break;
2577 case TEAM_OPTION_TYPE_S32:
2578 ctx.data.s32_val = nla_get_s32(attr_data);
2579 break;
2580 default:
2581 BUG();
2582 }
2583 err = team_option_set(team, opt_inst, &ctx);
2584 if (err)
2585 goto team_put;
2586 opt_inst->changed = true;
2587
2588 /* dumb/evil user-space can send us duplicate opt,
2589 * keep only the last one
2590 */
2591 if (__team_option_inst_tmp_find(&opt_inst_list,
2592 opt_inst))
2593 continue;
2594
2595 list_add(&opt_inst->tmp_list, &opt_inst_list);
2596 }
2597 if (!opt_found) {
2598 err = -ENOENT;
2599 goto team_put;
2600 }
2601 }
2602
2603 err = team_nl_send_event_options_get(team, &opt_inst_list);
2604
2605 team_put:
2606 team_nl_team_put(team);
2607 rtnl_unlock:
2608 rtnl_unlock();
2609 return err;
2610 }
2611
2612 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2613 struct team_port *port)
2614 {
2615 struct nlattr *port_item;
2616
2617 port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2618 if (!port_item)
2619 goto nest_cancel;
2620 if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2621 goto nest_cancel;
2622 if (port->changed) {
2623 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2624 goto nest_cancel;
2625 port->changed = false;
2626 }
2627 if ((port->removed &&
2628 nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2629 (port->state.linkup &&
2630 nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2631 nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2632 nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2633 goto nest_cancel;
2634 nla_nest_end(skb, port_item);
2635 return 0;
2636
2637 nest_cancel:
2638 nla_nest_cancel(skb, port_item);
2639 return -EMSGSIZE;
2640 }
2641
2642 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2643 int flags, team_nl_send_func_t *send_func,
2644 struct team_port *one_port)
2645 {
2646 struct nlattr *port_list;
2647 struct nlmsghdr *nlh;
2648 void *hdr;
2649 struct team_port *port;
2650 int err;
2651 struct sk_buff *skb = NULL;
2652 bool incomplete;
2653 int i;
2654
2655 port = list_first_entry_or_null(&team->port_list,
2656 struct team_port, list);
2657
2658 start_again:
2659 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2660 if (err)
2661 return err;
2662
2663 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2664 TEAM_CMD_PORT_LIST_GET);
2665 if (!hdr) {
2666 nlmsg_free(skb);
2667 return -EMSGSIZE;
2668 }
2669
2670 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2671 goto nla_put_failure;
2672 port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2673 if (!port_list)
2674 goto nla_put_failure;
2675
2676 i = 0;
2677 incomplete = false;
2678
2679 /* If one port is selected, called wants to send port list containing
2680 * only this port. Otherwise go through all listed ports and send all
2681 */
2682 if (one_port) {
2683 err = team_nl_fill_one_port_get(skb, one_port);
2684 if (err)
2685 goto errout;
2686 } else if (port) {
2687 list_for_each_entry_from(port, &team->port_list, list) {
2688 err = team_nl_fill_one_port_get(skb, port);
2689 if (err) {
2690 if (err == -EMSGSIZE) {
2691 if (!i)
2692 goto errout;
2693 incomplete = true;
2694 break;
2695 }
2696 goto errout;
2697 }
2698 i++;
2699 }
2700 }
2701
2702 nla_nest_end(skb, port_list);
2703 genlmsg_end(skb, hdr);
2704 if (incomplete)
2705 goto start_again;
2706
2707 send_done:
2708 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2709 if (!nlh) {
2710 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2711 if (err)
2712 return err;
2713 goto send_done;
2714 }
2715
2716 return send_func(skb, team, portid);
2717
2718 nla_put_failure:
2719 err = -EMSGSIZE;
2720 errout:
2721 nlmsg_free(skb);
2722 return err;
2723 }
2724
2725 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2726 struct genl_info *info)
2727 {
2728 struct team *team;
2729 int err;
2730
2731 team = team_nl_team_get(info);
2732 if (!team)
2733 return -EINVAL;
2734
2735 err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2736 NLM_F_ACK, team_nl_send_unicast, NULL);
2737
2738 team_nl_team_put(team);
2739
2740 return err;
2741 }
2742
2743 static const struct genl_ops team_nl_ops[] = {
2744 {
2745 .cmd = TEAM_CMD_NOOP,
2746 .doit = team_nl_cmd_noop,
2747 .policy = team_nl_policy,
2748 },
2749 {
2750 .cmd = TEAM_CMD_OPTIONS_SET,
2751 .doit = team_nl_cmd_options_set,
2752 .policy = team_nl_policy,
2753 .flags = GENL_ADMIN_PERM,
2754 },
2755 {
2756 .cmd = TEAM_CMD_OPTIONS_GET,
2757 .doit = team_nl_cmd_options_get,
2758 .policy = team_nl_policy,
2759 .flags = GENL_ADMIN_PERM,
2760 },
2761 {
2762 .cmd = TEAM_CMD_PORT_LIST_GET,
2763 .doit = team_nl_cmd_port_list_get,
2764 .policy = team_nl_policy,
2765 .flags = GENL_ADMIN_PERM,
2766 },
2767 };
2768
2769 static const struct genl_multicast_group team_nl_mcgrps[] = {
2770 { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2771 };
2772
2773 static struct genl_family team_nl_family __ro_after_init = {
2774 .name = TEAM_GENL_NAME,
2775 .version = TEAM_GENL_VERSION,
2776 .maxattr = TEAM_ATTR_MAX,
2777 .netnsok = true,
2778 .module = THIS_MODULE,
2779 .ops = team_nl_ops,
2780 .n_ops = ARRAY_SIZE(team_nl_ops),
2781 .mcgrps = team_nl_mcgrps,
2782 .n_mcgrps = ARRAY_SIZE(team_nl_mcgrps),
2783 };
2784
2785 static int team_nl_send_multicast(struct sk_buff *skb,
2786 struct team *team, u32 portid)
2787 {
2788 return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2789 skb, 0, 0, GFP_KERNEL);
2790 }
2791
2792 static int team_nl_send_event_options_get(struct team *team,
2793 struct list_head *sel_opt_inst_list)
2794 {
2795 return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2796 sel_opt_inst_list);
2797 }
2798
2799 static int team_nl_send_event_port_get(struct team *team,
2800 struct team_port *port)
2801 {
2802 return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2803 port);
2804 }
2805
2806 static int __init team_nl_init(void)
2807 {
2808 return genl_register_family(&team_nl_family);
2809 }
2810
2811 static void team_nl_fini(void)
2812 {
2813 genl_unregister_family(&team_nl_family);
2814 }
2815
2816
2817 /******************
2818 * Change checkers
2819 ******************/
2820
2821 static void __team_options_change_check(struct team *team)
2822 {
2823 int err;
2824 struct team_option_inst *opt_inst;
2825 LIST_HEAD(sel_opt_inst_list);
2826
2827 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2828 if (opt_inst->changed)
2829 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2830 }
2831 err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2832 if (err && err != -ESRCH)
2833 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2834 err);
2835 }
2836
2837 /* rtnl lock is held */
2838
2839 static void __team_port_change_send(struct team_port *port, bool linkup)
2840 {
2841 int err;
2842
2843 port->changed = true;
2844 port->state.linkup = linkup;
2845 team_refresh_port_linkup(port);
2846 if (linkup) {
2847 struct ethtool_link_ksettings ecmd;
2848
2849 err = __ethtool_get_link_ksettings(port->dev, &ecmd);
2850 if (!err) {
2851 port->state.speed = ecmd.base.speed;
2852 port->state.duplex = ecmd.base.duplex;
2853 goto send_event;
2854 }
2855 }
2856 port->state.speed = 0;
2857 port->state.duplex = 0;
2858
2859 send_event:
2860 err = team_nl_send_event_port_get(port->team, port);
2861 if (err && err != -ESRCH)
2862 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2863 port->dev->name, err);
2864
2865 }
2866
2867 static void __team_carrier_check(struct team *team)
2868 {
2869 struct team_port *port;
2870 bool team_linkup;
2871
2872 if (team->user_carrier_enabled)
2873 return;
2874
2875 team_linkup = false;
2876 list_for_each_entry(port, &team->port_list, list) {
2877 if (port->linkup) {
2878 team_linkup = true;
2879 break;
2880 }
2881 }
2882
2883 if (team_linkup)
2884 netif_carrier_on(team->dev);
2885 else
2886 netif_carrier_off(team->dev);
2887 }
2888
2889 static void __team_port_change_check(struct team_port *port, bool linkup)
2890 {
2891 if (port->state.linkup != linkup)
2892 __team_port_change_send(port, linkup);
2893 __team_carrier_check(port->team);
2894 }
2895
2896 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2897 {
2898 __team_port_change_send(port, linkup);
2899 __team_carrier_check(port->team);
2900 }
2901
2902 static void __team_port_change_port_removed(struct team_port *port)
2903 {
2904 port->removed = true;
2905 __team_port_change_send(port, false);
2906 __team_carrier_check(port->team);
2907 }
2908
2909 static void team_port_change_check(struct team_port *port, bool linkup)
2910 {
2911 struct team *team = port->team;
2912
2913 mutex_lock(&team->lock);
2914 __team_port_change_check(port, linkup);
2915 mutex_unlock(&team->lock);
2916 }
2917
2918
2919 /************************************
2920 * Net device notifier event handler
2921 ************************************/
2922
2923 static int team_device_event(struct notifier_block *unused,
2924 unsigned long event, void *ptr)
2925 {
2926 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2927 struct team_port *port;
2928
2929 port = team_port_get_rtnl(dev);
2930 if (!port)
2931 return NOTIFY_DONE;
2932
2933 switch (event) {
2934 case NETDEV_UP:
2935 if (netif_carrier_ok(dev))
2936 team_port_change_check(port, true);
2937 break;
2938 case NETDEV_DOWN:
2939 team_port_change_check(port, false);
2940 break;
2941 case NETDEV_CHANGE:
2942 if (netif_running(port->dev))
2943 team_port_change_check(port,
2944 !!netif_oper_up(port->dev));
2945 break;
2946 case NETDEV_UNREGISTER:
2947 team_del_slave(port->team->dev, dev);
2948 break;
2949 case NETDEV_FEAT_CHANGE:
2950 team_compute_features(port->team);
2951 break;
2952 case NETDEV_PRECHANGEMTU:
2953 /* Forbid to change mtu of underlaying device */
2954 if (!port->team->port_mtu_change_allowed)
2955 return NOTIFY_BAD;
2956 break;
2957 case NETDEV_PRE_TYPE_CHANGE:
2958 /* Forbid to change type of underlaying device */
2959 return NOTIFY_BAD;
2960 case NETDEV_RESEND_IGMP:
2961 /* Propagate to master device */
2962 call_netdevice_notifiers(event, port->team->dev);
2963 break;
2964 }
2965 return NOTIFY_DONE;
2966 }
2967
2968 static struct notifier_block team_notifier_block __read_mostly = {
2969 .notifier_call = team_device_event,
2970 };
2971
2972
2973 /***********************
2974 * Module init and exit
2975 ***********************/
2976
2977 static int __init team_module_init(void)
2978 {
2979 int err;
2980
2981 register_netdevice_notifier(&team_notifier_block);
2982
2983 err = rtnl_link_register(&team_link_ops);
2984 if (err)
2985 goto err_rtnl_reg;
2986
2987 err = team_nl_init();
2988 if (err)
2989 goto err_nl_init;
2990
2991 return 0;
2992
2993 err_nl_init:
2994 rtnl_link_unregister(&team_link_ops);
2995
2996 err_rtnl_reg:
2997 unregister_netdevice_notifier(&team_notifier_block);
2998
2999 return err;
3000 }
3001
3002 static void __exit team_module_exit(void)
3003 {
3004 team_nl_fini();
3005 rtnl_link_unregister(&team_link_ops);
3006 unregister_netdevice_notifier(&team_notifier_block);
3007 }
3008
3009 module_init(team_module_init);
3010 module_exit(team_module_exit);
3011
3012 MODULE_LICENSE("GPL v2");
3013 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
3014 MODULE_DESCRIPTION("Ethernet team device driver");
3015 MODULE_ALIAS_RTNL_LINK(DRV_NAME);
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