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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph...
[deliverable/linux.git] / drivers / net / team / team.c
1 /*
2 * drivers/net/team/team.c - Network team device driver
3 * Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 */
10
11 #include <linux/kernel.h>
12 #include <linux/types.h>
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/slab.h>
16 #include <linux/rcupdate.h>
17 #include <linux/errno.h>
18 #include <linux/ctype.h>
19 #include <linux/notifier.h>
20 #include <linux/netdevice.h>
21 #include <linux/netpoll.h>
22 #include <linux/if_vlan.h>
23 #include <linux/if_arp.h>
24 #include <linux/socket.h>
25 #include <linux/etherdevice.h>
26 #include <linux/rtnetlink.h>
27 #include <net/rtnetlink.h>
28 #include <net/genetlink.h>
29 #include <net/netlink.h>
30 #include <net/sch_generic.h>
31 #include <net/switchdev.h>
32 #include <generated/utsrelease.h>
33 #include <linux/if_team.h>
34
35 #define DRV_NAME "team"
36
37
38 /**********
39 * Helpers
40 **********/
41
42 #define team_port_exists(dev) (dev->priv_flags & IFF_TEAM_PORT)
43
44 static struct team_port *team_port_get_rcu(const struct net_device *dev)
45 {
46 return rcu_dereference(dev->rx_handler_data);
47 }
48
49 static struct team_port *team_port_get_rtnl(const struct net_device *dev)
50 {
51 struct team_port *port = rtnl_dereference(dev->rx_handler_data);
52
53 return team_port_exists(dev) ? port : NULL;
54 }
55
56 /*
57 * Since the ability to change device address for open port device is tested in
58 * team_port_add, this function can be called without control of return value
59 */
60 static int __set_port_dev_addr(struct net_device *port_dev,
61 const unsigned char *dev_addr)
62 {
63 struct sockaddr addr;
64
65 memcpy(addr.sa_data, dev_addr, port_dev->addr_len);
66 addr.sa_family = port_dev->type;
67 return dev_set_mac_address(port_dev, &addr);
68 }
69
70 static int team_port_set_orig_dev_addr(struct team_port *port)
71 {
72 return __set_port_dev_addr(port->dev, port->orig.dev_addr);
73 }
74
75 static int team_port_set_team_dev_addr(struct team *team,
76 struct team_port *port)
77 {
78 return __set_port_dev_addr(port->dev, team->dev->dev_addr);
79 }
80
81 int team_modeop_port_enter(struct team *team, struct team_port *port)
82 {
83 return team_port_set_team_dev_addr(team, port);
84 }
85 EXPORT_SYMBOL(team_modeop_port_enter);
86
87 void team_modeop_port_change_dev_addr(struct team *team,
88 struct team_port *port)
89 {
90 team_port_set_team_dev_addr(team, port);
91 }
92 EXPORT_SYMBOL(team_modeop_port_change_dev_addr);
93
94 static void team_lower_state_changed(struct team_port *port)
95 {
96 struct netdev_lag_lower_state_info info;
97
98 info.link_up = port->linkup;
99 info.tx_enabled = team_port_enabled(port);
100 netdev_lower_state_changed(port->dev, &info);
101 }
102
103 static void team_refresh_port_linkup(struct team_port *port)
104 {
105 bool new_linkup = port->user.linkup_enabled ? port->user.linkup :
106 port->state.linkup;
107
108 if (port->linkup != new_linkup) {
109 port->linkup = new_linkup;
110 team_lower_state_changed(port);
111 }
112 }
113
114
115 /*******************
116 * Options handling
117 *******************/
118
119 struct team_option_inst { /* One for each option instance */
120 struct list_head list;
121 struct list_head tmp_list;
122 struct team_option *option;
123 struct team_option_inst_info info;
124 bool changed;
125 bool removed;
126 };
127
128 static struct team_option *__team_find_option(struct team *team,
129 const char *opt_name)
130 {
131 struct team_option *option;
132
133 list_for_each_entry(option, &team->option_list, list) {
134 if (strcmp(option->name, opt_name) == 0)
135 return option;
136 }
137 return NULL;
138 }
139
140 static void __team_option_inst_del(struct team_option_inst *opt_inst)
141 {
142 list_del(&opt_inst->list);
143 kfree(opt_inst);
144 }
145
146 static void __team_option_inst_del_option(struct team *team,
147 struct team_option *option)
148 {
149 struct team_option_inst *opt_inst, *tmp;
150
151 list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
152 if (opt_inst->option == option)
153 __team_option_inst_del(opt_inst);
154 }
155 }
156
157 static int __team_option_inst_add(struct team *team, struct team_option *option,
158 struct team_port *port)
159 {
160 struct team_option_inst *opt_inst;
161 unsigned int array_size;
162 unsigned int i;
163 int err;
164
165 array_size = option->array_size;
166 if (!array_size)
167 array_size = 1; /* No array but still need one instance */
168
169 for (i = 0; i < array_size; i++) {
170 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL);
171 if (!opt_inst)
172 return -ENOMEM;
173 opt_inst->option = option;
174 opt_inst->info.port = port;
175 opt_inst->info.array_index = i;
176 opt_inst->changed = true;
177 opt_inst->removed = false;
178 list_add_tail(&opt_inst->list, &team->option_inst_list);
179 if (option->init) {
180 err = option->init(team, &opt_inst->info);
181 if (err)
182 return err;
183 }
184
185 }
186 return 0;
187 }
188
189 static int __team_option_inst_add_option(struct team *team,
190 struct team_option *option)
191 {
192 int err;
193
194 if (!option->per_port) {
195 err = __team_option_inst_add(team, option, NULL);
196 if (err)
197 goto inst_del_option;
198 }
199 return 0;
200
201 inst_del_option:
202 __team_option_inst_del_option(team, option);
203 return err;
204 }
205
206 static void __team_option_inst_mark_removed_option(struct team *team,
207 struct team_option *option)
208 {
209 struct team_option_inst *opt_inst;
210
211 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
212 if (opt_inst->option == option) {
213 opt_inst->changed = true;
214 opt_inst->removed = true;
215 }
216 }
217 }
218
219 static void __team_option_inst_del_port(struct team *team,
220 struct team_port *port)
221 {
222 struct team_option_inst *opt_inst, *tmp;
223
224 list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
225 if (opt_inst->option->per_port &&
226 opt_inst->info.port == port)
227 __team_option_inst_del(opt_inst);
228 }
229 }
230
231 static int __team_option_inst_add_port(struct team *team,
232 struct team_port *port)
233 {
234 struct team_option *option;
235 int err;
236
237 list_for_each_entry(option, &team->option_list, list) {
238 if (!option->per_port)
239 continue;
240 err = __team_option_inst_add(team, option, port);
241 if (err)
242 goto inst_del_port;
243 }
244 return 0;
245
246 inst_del_port:
247 __team_option_inst_del_port(team, port);
248 return err;
249 }
250
251 static void __team_option_inst_mark_removed_port(struct team *team,
252 struct team_port *port)
253 {
254 struct team_option_inst *opt_inst;
255
256 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
257 if (opt_inst->info.port == port) {
258 opt_inst->changed = true;
259 opt_inst->removed = true;
260 }
261 }
262 }
263
264 static int __team_options_register(struct team *team,
265 const struct team_option *option,
266 size_t option_count)
267 {
268 int i;
269 struct team_option **dst_opts;
270 int err;
271
272 dst_opts = kzalloc(sizeof(struct team_option *) * option_count,
273 GFP_KERNEL);
274 if (!dst_opts)
275 return -ENOMEM;
276 for (i = 0; i < option_count; i++, option++) {
277 if (__team_find_option(team, option->name)) {
278 err = -EEXIST;
279 goto alloc_rollback;
280 }
281 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
282 if (!dst_opts[i]) {
283 err = -ENOMEM;
284 goto alloc_rollback;
285 }
286 }
287
288 for (i = 0; i < option_count; i++) {
289 err = __team_option_inst_add_option(team, dst_opts[i]);
290 if (err)
291 goto inst_rollback;
292 list_add_tail(&dst_opts[i]->list, &team->option_list);
293 }
294
295 kfree(dst_opts);
296 return 0;
297
298 inst_rollback:
299 for (i--; i >= 0; i--)
300 __team_option_inst_del_option(team, dst_opts[i]);
301
302 i = option_count - 1;
303 alloc_rollback:
304 for (i--; i >= 0; i--)
305 kfree(dst_opts[i]);
306
307 kfree(dst_opts);
308 return err;
309 }
310
311 static void __team_options_mark_removed(struct team *team,
312 const struct team_option *option,
313 size_t option_count)
314 {
315 int i;
316
317 for (i = 0; i < option_count; i++, option++) {
318 struct team_option *del_opt;
319
320 del_opt = __team_find_option(team, option->name);
321 if (del_opt)
322 __team_option_inst_mark_removed_option(team, del_opt);
323 }
324 }
325
326 static void __team_options_unregister(struct team *team,
327 const struct team_option *option,
328 size_t option_count)
329 {
330 int i;
331
332 for (i = 0; i < option_count; i++, option++) {
333 struct team_option *del_opt;
334
335 del_opt = __team_find_option(team, option->name);
336 if (del_opt) {
337 __team_option_inst_del_option(team, del_opt);
338 list_del(&del_opt->list);
339 kfree(del_opt);
340 }
341 }
342 }
343
344 static void __team_options_change_check(struct team *team);
345
346 int team_options_register(struct team *team,
347 const struct team_option *option,
348 size_t option_count)
349 {
350 int err;
351
352 err = __team_options_register(team, option, option_count);
353 if (err)
354 return err;
355 __team_options_change_check(team);
356 return 0;
357 }
358 EXPORT_SYMBOL(team_options_register);
359
360 void team_options_unregister(struct team *team,
361 const struct team_option *option,
362 size_t option_count)
363 {
364 __team_options_mark_removed(team, option, option_count);
365 __team_options_change_check(team);
366 __team_options_unregister(team, option, option_count);
367 }
368 EXPORT_SYMBOL(team_options_unregister);
369
370 static int team_option_get(struct team *team,
371 struct team_option_inst *opt_inst,
372 struct team_gsetter_ctx *ctx)
373 {
374 if (!opt_inst->option->getter)
375 return -EOPNOTSUPP;
376 return opt_inst->option->getter(team, ctx);
377 }
378
379 static int team_option_set(struct team *team,
380 struct team_option_inst *opt_inst,
381 struct team_gsetter_ctx *ctx)
382 {
383 if (!opt_inst->option->setter)
384 return -EOPNOTSUPP;
385 return opt_inst->option->setter(team, ctx);
386 }
387
388 void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info)
389 {
390 struct team_option_inst *opt_inst;
391
392 opt_inst = container_of(opt_inst_info, struct team_option_inst, info);
393 opt_inst->changed = true;
394 }
395 EXPORT_SYMBOL(team_option_inst_set_change);
396
397 void team_options_change_check(struct team *team)
398 {
399 __team_options_change_check(team);
400 }
401 EXPORT_SYMBOL(team_options_change_check);
402
403
404 /****************
405 * Mode handling
406 ****************/
407
408 static LIST_HEAD(mode_list);
409 static DEFINE_SPINLOCK(mode_list_lock);
410
411 struct team_mode_item {
412 struct list_head list;
413 const struct team_mode *mode;
414 };
415
416 static struct team_mode_item *__find_mode(const char *kind)
417 {
418 struct team_mode_item *mitem;
419
420 list_for_each_entry(mitem, &mode_list, list) {
421 if (strcmp(mitem->mode->kind, kind) == 0)
422 return mitem;
423 }
424 return NULL;
425 }
426
427 static bool is_good_mode_name(const char *name)
428 {
429 while (*name != '\0') {
430 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
431 return false;
432 name++;
433 }
434 return true;
435 }
436
437 int team_mode_register(const struct team_mode *mode)
438 {
439 int err = 0;
440 struct team_mode_item *mitem;
441
442 if (!is_good_mode_name(mode->kind) ||
443 mode->priv_size > TEAM_MODE_PRIV_SIZE)
444 return -EINVAL;
445
446 mitem = kmalloc(sizeof(*mitem), GFP_KERNEL);
447 if (!mitem)
448 return -ENOMEM;
449
450 spin_lock(&mode_list_lock);
451 if (__find_mode(mode->kind)) {
452 err = -EEXIST;
453 kfree(mitem);
454 goto unlock;
455 }
456 mitem->mode = mode;
457 list_add_tail(&mitem->list, &mode_list);
458 unlock:
459 spin_unlock(&mode_list_lock);
460 return err;
461 }
462 EXPORT_SYMBOL(team_mode_register);
463
464 void team_mode_unregister(const struct team_mode *mode)
465 {
466 struct team_mode_item *mitem;
467
468 spin_lock(&mode_list_lock);
469 mitem = __find_mode(mode->kind);
470 if (mitem) {
471 list_del_init(&mitem->list);
472 kfree(mitem);
473 }
474 spin_unlock(&mode_list_lock);
475 }
476 EXPORT_SYMBOL(team_mode_unregister);
477
478 static const struct team_mode *team_mode_get(const char *kind)
479 {
480 struct team_mode_item *mitem;
481 const struct team_mode *mode = NULL;
482
483 spin_lock(&mode_list_lock);
484 mitem = __find_mode(kind);
485 if (!mitem) {
486 spin_unlock(&mode_list_lock);
487 request_module("team-mode-%s", kind);
488 spin_lock(&mode_list_lock);
489 mitem = __find_mode(kind);
490 }
491 if (mitem) {
492 mode = mitem->mode;
493 if (!try_module_get(mode->owner))
494 mode = NULL;
495 }
496
497 spin_unlock(&mode_list_lock);
498 return mode;
499 }
500
501 static void team_mode_put(const struct team_mode *mode)
502 {
503 module_put(mode->owner);
504 }
505
506 static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
507 {
508 dev_kfree_skb_any(skb);
509 return false;
510 }
511
512 static rx_handler_result_t team_dummy_receive(struct team *team,
513 struct team_port *port,
514 struct sk_buff *skb)
515 {
516 return RX_HANDLER_ANOTHER;
517 }
518
519 static const struct team_mode __team_no_mode = {
520 .kind = "*NOMODE*",
521 };
522
523 static bool team_is_mode_set(struct team *team)
524 {
525 return team->mode != &__team_no_mode;
526 }
527
528 static void team_set_no_mode(struct team *team)
529 {
530 team->user_carrier_enabled = false;
531 team->mode = &__team_no_mode;
532 }
533
534 static void team_adjust_ops(struct team *team)
535 {
536 /*
537 * To avoid checks in rx/tx skb paths, ensure here that non-null and
538 * correct ops are always set.
539 */
540
541 if (!team->en_port_count || !team_is_mode_set(team) ||
542 !team->mode->ops->transmit)
543 team->ops.transmit = team_dummy_transmit;
544 else
545 team->ops.transmit = team->mode->ops->transmit;
546
547 if (!team->en_port_count || !team_is_mode_set(team) ||
548 !team->mode->ops->receive)
549 team->ops.receive = team_dummy_receive;
550 else
551 team->ops.receive = team->mode->ops->receive;
552 }
553
554 /*
555 * We can benefit from the fact that it's ensured no port is present
556 * at the time of mode change. Therefore no packets are in fly so there's no
557 * need to set mode operations in any special way.
558 */
559 static int __team_change_mode(struct team *team,
560 const struct team_mode *new_mode)
561 {
562 /* Check if mode was previously set and do cleanup if so */
563 if (team_is_mode_set(team)) {
564 void (*exit_op)(struct team *team) = team->ops.exit;
565
566 /* Clear ops area so no callback is called any longer */
567 memset(&team->ops, 0, sizeof(struct team_mode_ops));
568 team_adjust_ops(team);
569
570 if (exit_op)
571 exit_op(team);
572 team_mode_put(team->mode);
573 team_set_no_mode(team);
574 /* zero private data area */
575 memset(&team->mode_priv, 0,
576 sizeof(struct team) - offsetof(struct team, mode_priv));
577 }
578
579 if (!new_mode)
580 return 0;
581
582 if (new_mode->ops->init) {
583 int err;
584
585 err = new_mode->ops->init(team);
586 if (err)
587 return err;
588 }
589
590 team->mode = new_mode;
591 memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
592 team_adjust_ops(team);
593
594 return 0;
595 }
596
597 static int team_change_mode(struct team *team, const char *kind)
598 {
599 const struct team_mode *new_mode;
600 struct net_device *dev = team->dev;
601 int err;
602
603 if (!list_empty(&team->port_list)) {
604 netdev_err(dev, "No ports can be present during mode change\n");
605 return -EBUSY;
606 }
607
608 if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) {
609 netdev_err(dev, "Unable to change to the same mode the team is in\n");
610 return -EINVAL;
611 }
612
613 new_mode = team_mode_get(kind);
614 if (!new_mode) {
615 netdev_err(dev, "Mode \"%s\" not found\n", kind);
616 return -EINVAL;
617 }
618
619 err = __team_change_mode(team, new_mode);
620 if (err) {
621 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
622 team_mode_put(new_mode);
623 return err;
624 }
625
626 netdev_info(dev, "Mode changed to \"%s\"\n", kind);
627 return 0;
628 }
629
630
631 /*********************
632 * Peers notification
633 *********************/
634
635 static void team_notify_peers_work(struct work_struct *work)
636 {
637 struct team *team;
638 int val;
639
640 team = container_of(work, struct team, notify_peers.dw.work);
641
642 if (!rtnl_trylock()) {
643 schedule_delayed_work(&team->notify_peers.dw, 0);
644 return;
645 }
646 val = atomic_dec_if_positive(&team->notify_peers.count_pending);
647 if (val < 0) {
648 rtnl_unlock();
649 return;
650 }
651 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, team->dev);
652 rtnl_unlock();
653 if (val)
654 schedule_delayed_work(&team->notify_peers.dw,
655 msecs_to_jiffies(team->notify_peers.interval));
656 }
657
658 static void team_notify_peers(struct team *team)
659 {
660 if (!team->notify_peers.count || !netif_running(team->dev))
661 return;
662 atomic_add(team->notify_peers.count, &team->notify_peers.count_pending);
663 schedule_delayed_work(&team->notify_peers.dw, 0);
664 }
665
666 static void team_notify_peers_init(struct team *team)
667 {
668 INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work);
669 }
670
671 static void team_notify_peers_fini(struct team *team)
672 {
673 cancel_delayed_work_sync(&team->notify_peers.dw);
674 }
675
676
677 /*******************************
678 * Send multicast group rejoins
679 *******************************/
680
681 static void team_mcast_rejoin_work(struct work_struct *work)
682 {
683 struct team *team;
684 int val;
685
686 team = container_of(work, struct team, mcast_rejoin.dw.work);
687
688 if (!rtnl_trylock()) {
689 schedule_delayed_work(&team->mcast_rejoin.dw, 0);
690 return;
691 }
692 val = atomic_dec_if_positive(&team->mcast_rejoin.count_pending);
693 if (val < 0) {
694 rtnl_unlock();
695 return;
696 }
697 call_netdevice_notifiers(NETDEV_RESEND_IGMP, team->dev);
698 rtnl_unlock();
699 if (val)
700 schedule_delayed_work(&team->mcast_rejoin.dw,
701 msecs_to_jiffies(team->mcast_rejoin.interval));
702 }
703
704 static void team_mcast_rejoin(struct team *team)
705 {
706 if (!team->mcast_rejoin.count || !netif_running(team->dev))
707 return;
708 atomic_add(team->mcast_rejoin.count, &team->mcast_rejoin.count_pending);
709 schedule_delayed_work(&team->mcast_rejoin.dw, 0);
710 }
711
712 static void team_mcast_rejoin_init(struct team *team)
713 {
714 INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work);
715 }
716
717 static void team_mcast_rejoin_fini(struct team *team)
718 {
719 cancel_delayed_work_sync(&team->mcast_rejoin.dw);
720 }
721
722
723 /************************
724 * Rx path frame handler
725 ************************/
726
727 /* note: already called with rcu_read_lock */
728 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
729 {
730 struct sk_buff *skb = *pskb;
731 struct team_port *port;
732 struct team *team;
733 rx_handler_result_t res;
734
735 skb = skb_share_check(skb, GFP_ATOMIC);
736 if (!skb)
737 return RX_HANDLER_CONSUMED;
738
739 *pskb = skb;
740
741 port = team_port_get_rcu(skb->dev);
742 team = port->team;
743 if (!team_port_enabled(port)) {
744 /* allow exact match delivery for disabled ports */
745 res = RX_HANDLER_EXACT;
746 } else {
747 res = team->ops.receive(team, port, skb);
748 }
749 if (res == RX_HANDLER_ANOTHER) {
750 struct team_pcpu_stats *pcpu_stats;
751
752 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
753 u64_stats_update_begin(&pcpu_stats->syncp);
754 pcpu_stats->rx_packets++;
755 pcpu_stats->rx_bytes += skb->len;
756 if (skb->pkt_type == PACKET_MULTICAST)
757 pcpu_stats->rx_multicast++;
758 u64_stats_update_end(&pcpu_stats->syncp);
759
760 skb->dev = team->dev;
761 } else if (res == RX_HANDLER_EXACT) {
762 this_cpu_inc(team->pcpu_stats->rx_nohandler);
763 } else {
764 this_cpu_inc(team->pcpu_stats->rx_dropped);
765 }
766
767 return res;
768 }
769
770
771 /*************************************
772 * Multiqueue Tx port select override
773 *************************************/
774
775 static int team_queue_override_init(struct team *team)
776 {
777 struct list_head *listarr;
778 unsigned int queue_cnt = team->dev->num_tx_queues - 1;
779 unsigned int i;
780
781 if (!queue_cnt)
782 return 0;
783 listarr = kmalloc(sizeof(struct list_head) * queue_cnt, GFP_KERNEL);
784 if (!listarr)
785 return -ENOMEM;
786 team->qom_lists = listarr;
787 for (i = 0; i < queue_cnt; i++)
788 INIT_LIST_HEAD(listarr++);
789 return 0;
790 }
791
792 static void team_queue_override_fini(struct team *team)
793 {
794 kfree(team->qom_lists);
795 }
796
797 static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
798 {
799 return &team->qom_lists[queue_id - 1];
800 }
801
802 /*
803 * note: already called with rcu_read_lock
804 */
805 static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
806 {
807 struct list_head *qom_list;
808 struct team_port *port;
809
810 if (!team->queue_override_enabled || !skb->queue_mapping)
811 return false;
812 qom_list = __team_get_qom_list(team, skb->queue_mapping);
813 list_for_each_entry_rcu(port, qom_list, qom_list) {
814 if (!team_dev_queue_xmit(team, port, skb))
815 return true;
816 }
817 return false;
818 }
819
820 static void __team_queue_override_port_del(struct team *team,
821 struct team_port *port)
822 {
823 if (!port->queue_id)
824 return;
825 list_del_rcu(&port->qom_list);
826 }
827
828 static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
829 struct team_port *cur)
830 {
831 if (port->priority < cur->priority)
832 return true;
833 if (port->priority > cur->priority)
834 return false;
835 if (port->index < cur->index)
836 return true;
837 return false;
838 }
839
840 static void __team_queue_override_port_add(struct team *team,
841 struct team_port *port)
842 {
843 struct team_port *cur;
844 struct list_head *qom_list;
845 struct list_head *node;
846
847 if (!port->queue_id)
848 return;
849 qom_list = __team_get_qom_list(team, port->queue_id);
850 node = qom_list;
851 list_for_each_entry(cur, qom_list, qom_list) {
852 if (team_queue_override_port_has_gt_prio_than(port, cur))
853 break;
854 node = &cur->qom_list;
855 }
856 list_add_tail_rcu(&port->qom_list, node);
857 }
858
859 static void __team_queue_override_enabled_check(struct team *team)
860 {
861 struct team_port *port;
862 bool enabled = false;
863
864 list_for_each_entry(port, &team->port_list, list) {
865 if (port->queue_id) {
866 enabled = true;
867 break;
868 }
869 }
870 if (enabled == team->queue_override_enabled)
871 return;
872 netdev_dbg(team->dev, "%s queue override\n",
873 enabled ? "Enabling" : "Disabling");
874 team->queue_override_enabled = enabled;
875 }
876
877 static void team_queue_override_port_prio_changed(struct team *team,
878 struct team_port *port)
879 {
880 if (!port->queue_id || team_port_enabled(port))
881 return;
882 __team_queue_override_port_del(team, port);
883 __team_queue_override_port_add(team, port);
884 __team_queue_override_enabled_check(team);
885 }
886
887 static void team_queue_override_port_change_queue_id(struct team *team,
888 struct team_port *port,
889 u16 new_queue_id)
890 {
891 if (team_port_enabled(port)) {
892 __team_queue_override_port_del(team, port);
893 port->queue_id = new_queue_id;
894 __team_queue_override_port_add(team, port);
895 __team_queue_override_enabled_check(team);
896 } else {
897 port->queue_id = new_queue_id;
898 }
899 }
900
901 static void team_queue_override_port_add(struct team *team,
902 struct team_port *port)
903 {
904 __team_queue_override_port_add(team, port);
905 __team_queue_override_enabled_check(team);
906 }
907
908 static void team_queue_override_port_del(struct team *team,
909 struct team_port *port)
910 {
911 __team_queue_override_port_del(team, port);
912 __team_queue_override_enabled_check(team);
913 }
914
915
916 /****************
917 * Port handling
918 ****************/
919
920 static bool team_port_find(const struct team *team,
921 const struct team_port *port)
922 {
923 struct team_port *cur;
924
925 list_for_each_entry(cur, &team->port_list, list)
926 if (cur == port)
927 return true;
928 return false;
929 }
930
931 /*
932 * Enable/disable port by adding to enabled port hashlist and setting
933 * port->index (Might be racy so reader could see incorrect ifindex when
934 * processing a flying packet, but that is not a problem). Write guarded
935 * by team->lock.
936 */
937 static void team_port_enable(struct team *team,
938 struct team_port *port)
939 {
940 if (team_port_enabled(port))
941 return;
942 port->index = team->en_port_count++;
943 hlist_add_head_rcu(&port->hlist,
944 team_port_index_hash(team, port->index));
945 team_adjust_ops(team);
946 team_queue_override_port_add(team, port);
947 if (team->ops.port_enabled)
948 team->ops.port_enabled(team, port);
949 team_notify_peers(team);
950 team_mcast_rejoin(team);
951 team_lower_state_changed(port);
952 }
953
954 static void __reconstruct_port_hlist(struct team *team, int rm_index)
955 {
956 int i;
957 struct team_port *port;
958
959 for (i = rm_index + 1; i < team->en_port_count; i++) {
960 port = team_get_port_by_index(team, i);
961 hlist_del_rcu(&port->hlist);
962 port->index--;
963 hlist_add_head_rcu(&port->hlist,
964 team_port_index_hash(team, port->index));
965 }
966 }
967
968 static void team_port_disable(struct team *team,
969 struct team_port *port)
970 {
971 if (!team_port_enabled(port))
972 return;
973 if (team->ops.port_disabled)
974 team->ops.port_disabled(team, port);
975 hlist_del_rcu(&port->hlist);
976 __reconstruct_port_hlist(team, port->index);
977 port->index = -1;
978 team->en_port_count--;
979 team_queue_override_port_del(team, port);
980 team_adjust_ops(team);
981 team_notify_peers(team);
982 team_mcast_rejoin(team);
983 team_lower_state_changed(port);
984 }
985
986 #define TEAM_VLAN_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
987 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
988 NETIF_F_HIGHDMA | NETIF_F_LRO)
989
990 #define TEAM_ENC_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
991 NETIF_F_RXCSUM | NETIF_F_ALL_TSO)
992
993 static void ___team_compute_features(struct team *team)
994 {
995 struct team_port *port;
996 u32 vlan_features = TEAM_VLAN_FEATURES & NETIF_F_ALL_FOR_ALL;
997 netdev_features_t enc_features = TEAM_ENC_FEATURES;
998 unsigned short max_hard_header_len = ETH_HLEN;
999 unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE |
1000 IFF_XMIT_DST_RELEASE_PERM;
1001
1002 list_for_each_entry(port, &team->port_list, list) {
1003 vlan_features = netdev_increment_features(vlan_features,
1004 port->dev->vlan_features,
1005 TEAM_VLAN_FEATURES);
1006 enc_features =
1007 netdev_increment_features(enc_features,
1008 port->dev->hw_enc_features,
1009 TEAM_ENC_FEATURES);
1010
1011
1012 dst_release_flag &= port->dev->priv_flags;
1013 if (port->dev->hard_header_len > max_hard_header_len)
1014 max_hard_header_len = port->dev->hard_header_len;
1015 }
1016
1017 team->dev->vlan_features = vlan_features;
1018 team->dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL;
1019 team->dev->hard_header_len = max_hard_header_len;
1020
1021 team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
1022 if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
1023 team->dev->priv_flags |= IFF_XMIT_DST_RELEASE;
1024 }
1025
1026 static void __team_compute_features(struct team *team)
1027 {
1028 ___team_compute_features(team);
1029 netdev_change_features(team->dev);
1030 }
1031
1032 static void team_compute_features(struct team *team)
1033 {
1034 mutex_lock(&team->lock);
1035 ___team_compute_features(team);
1036 mutex_unlock(&team->lock);
1037 netdev_change_features(team->dev);
1038 }
1039
1040 static int team_port_enter(struct team *team, struct team_port *port)
1041 {
1042 int err = 0;
1043
1044 dev_hold(team->dev);
1045 if (team->ops.port_enter) {
1046 err = team->ops.port_enter(team, port);
1047 if (err) {
1048 netdev_err(team->dev, "Device %s failed to enter team mode\n",
1049 port->dev->name);
1050 goto err_port_enter;
1051 }
1052 }
1053
1054 return 0;
1055
1056 err_port_enter:
1057 dev_put(team->dev);
1058
1059 return err;
1060 }
1061
1062 static void team_port_leave(struct team *team, struct team_port *port)
1063 {
1064 if (team->ops.port_leave)
1065 team->ops.port_leave(team, port);
1066 dev_put(team->dev);
1067 }
1068
1069 #ifdef CONFIG_NET_POLL_CONTROLLER
1070 static int team_port_enable_netpoll(struct team *team, struct team_port *port)
1071 {
1072 struct netpoll *np;
1073 int err;
1074
1075 if (!team->dev->npinfo)
1076 return 0;
1077
1078 np = kzalloc(sizeof(*np), GFP_KERNEL);
1079 if (!np)
1080 return -ENOMEM;
1081
1082 err = __netpoll_setup(np, port->dev);
1083 if (err) {
1084 kfree(np);
1085 return err;
1086 }
1087 port->np = np;
1088 return err;
1089 }
1090
1091 static void team_port_disable_netpoll(struct team_port *port)
1092 {
1093 struct netpoll *np = port->np;
1094
1095 if (!np)
1096 return;
1097 port->np = NULL;
1098
1099 /* Wait for transmitting packets to finish before freeing. */
1100 synchronize_rcu_bh();
1101 __netpoll_cleanup(np);
1102 kfree(np);
1103 }
1104 #else
1105 static int team_port_enable_netpoll(struct team *team, struct team_port *port)
1106 {
1107 return 0;
1108 }
1109 static void team_port_disable_netpoll(struct team_port *port)
1110 {
1111 }
1112 #endif
1113
1114 static int team_upper_dev_link(struct team *team, struct team_port *port)
1115 {
1116 struct netdev_lag_upper_info lag_upper_info;
1117 int err;
1118
1119 lag_upper_info.tx_type = team->mode->lag_tx_type;
1120 err = netdev_master_upper_dev_link(port->dev, team->dev, NULL,
1121 &lag_upper_info);
1122 if (err)
1123 return err;
1124 port->dev->priv_flags |= IFF_TEAM_PORT;
1125 return 0;
1126 }
1127
1128 static void team_upper_dev_unlink(struct team *team, struct team_port *port)
1129 {
1130 netdev_upper_dev_unlink(port->dev, team->dev);
1131 port->dev->priv_flags &= ~IFF_TEAM_PORT;
1132 }
1133
1134 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1135 static int team_dev_type_check_change(struct net_device *dev,
1136 struct net_device *port_dev);
1137
1138 static int team_port_add(struct team *team, struct net_device *port_dev)
1139 {
1140 struct net_device *dev = team->dev;
1141 struct team_port *port;
1142 char *portname = port_dev->name;
1143 int err;
1144
1145 if (port_dev->flags & IFF_LOOPBACK) {
1146 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1147 portname);
1148 return -EINVAL;
1149 }
1150
1151 if (team_port_exists(port_dev)) {
1152 netdev_err(dev, "Device %s is already a port "
1153 "of a team device\n", portname);
1154 return -EBUSY;
1155 }
1156
1157 if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1158 vlan_uses_dev(dev)) {
1159 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1160 portname);
1161 return -EPERM;
1162 }
1163
1164 err = team_dev_type_check_change(dev, port_dev);
1165 if (err)
1166 return err;
1167
1168 if (port_dev->flags & IFF_UP) {
1169 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1170 portname);
1171 return -EBUSY;
1172 }
1173
1174 port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1175 GFP_KERNEL);
1176 if (!port)
1177 return -ENOMEM;
1178
1179 port->dev = port_dev;
1180 port->team = team;
1181 INIT_LIST_HEAD(&port->qom_list);
1182
1183 port->orig.mtu = port_dev->mtu;
1184 err = dev_set_mtu(port_dev, dev->mtu);
1185 if (err) {
1186 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1187 goto err_set_mtu;
1188 }
1189
1190 memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1191
1192 err = team_port_enter(team, port);
1193 if (err) {
1194 netdev_err(dev, "Device %s failed to enter team mode\n",
1195 portname);
1196 goto err_port_enter;
1197 }
1198
1199 err = dev_open(port_dev);
1200 if (err) {
1201 netdev_dbg(dev, "Device %s opening failed\n",
1202 portname);
1203 goto err_dev_open;
1204 }
1205
1206 dev_uc_sync_multiple(port_dev, dev);
1207 dev_mc_sync_multiple(port_dev, dev);
1208
1209 err = vlan_vids_add_by_dev(port_dev, dev);
1210 if (err) {
1211 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1212 portname);
1213 goto err_vids_add;
1214 }
1215
1216 err = team_port_enable_netpoll(team, port);
1217 if (err) {
1218 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1219 portname);
1220 goto err_enable_netpoll;
1221 }
1222
1223 if (!(dev->features & NETIF_F_LRO))
1224 dev_disable_lro(port_dev);
1225
1226 err = netdev_rx_handler_register(port_dev, team_handle_frame,
1227 port);
1228 if (err) {
1229 netdev_err(dev, "Device %s failed to register rx_handler\n",
1230 portname);
1231 goto err_handler_register;
1232 }
1233
1234 err = team_upper_dev_link(team, port);
1235 if (err) {
1236 netdev_err(dev, "Device %s failed to set upper link\n",
1237 portname);
1238 goto err_set_upper_link;
1239 }
1240
1241 err = __team_option_inst_add_port(team, port);
1242 if (err) {
1243 netdev_err(dev, "Device %s failed to add per-port options\n",
1244 portname);
1245 goto err_option_port_add;
1246 }
1247
1248 port->index = -1;
1249 list_add_tail_rcu(&port->list, &team->port_list);
1250 team_port_enable(team, port);
1251 __team_compute_features(team);
1252 __team_port_change_port_added(port, !!netif_carrier_ok(port_dev));
1253 __team_options_change_check(team);
1254
1255 netdev_info(dev, "Port device %s added\n", portname);
1256
1257 return 0;
1258
1259 err_option_port_add:
1260 team_upper_dev_unlink(team, port);
1261
1262 err_set_upper_link:
1263 netdev_rx_handler_unregister(port_dev);
1264
1265 err_handler_register:
1266 team_port_disable_netpoll(port);
1267
1268 err_enable_netpoll:
1269 vlan_vids_del_by_dev(port_dev, dev);
1270
1271 err_vids_add:
1272 dev_uc_unsync(port_dev, dev);
1273 dev_mc_unsync(port_dev, dev);
1274 dev_close(port_dev);
1275
1276 err_dev_open:
1277 team_port_leave(team, port);
1278 team_port_set_orig_dev_addr(port);
1279
1280 err_port_enter:
1281 dev_set_mtu(port_dev, port->orig.mtu);
1282
1283 err_set_mtu:
1284 kfree(port);
1285
1286 return err;
1287 }
1288
1289 static void __team_port_change_port_removed(struct team_port *port);
1290
1291 static int team_port_del(struct team *team, struct net_device *port_dev)
1292 {
1293 struct net_device *dev = team->dev;
1294 struct team_port *port;
1295 char *portname = port_dev->name;
1296
1297 port = team_port_get_rtnl(port_dev);
1298 if (!port || !team_port_find(team, port)) {
1299 netdev_err(dev, "Device %s does not act as a port of this team\n",
1300 portname);
1301 return -ENOENT;
1302 }
1303
1304 team_port_disable(team, port);
1305 list_del_rcu(&port->list);
1306 team_upper_dev_unlink(team, port);
1307 netdev_rx_handler_unregister(port_dev);
1308 team_port_disable_netpoll(port);
1309 vlan_vids_del_by_dev(port_dev, dev);
1310 dev_uc_unsync(port_dev, dev);
1311 dev_mc_unsync(port_dev, dev);
1312 dev_close(port_dev);
1313 team_port_leave(team, port);
1314
1315 __team_option_inst_mark_removed_port(team, port);
1316 __team_options_change_check(team);
1317 __team_option_inst_del_port(team, port);
1318 __team_port_change_port_removed(port);
1319
1320 team_port_set_orig_dev_addr(port);
1321 dev_set_mtu(port_dev, port->orig.mtu);
1322 kfree_rcu(port, rcu);
1323 netdev_info(dev, "Port device %s removed\n", portname);
1324 __team_compute_features(team);
1325
1326 return 0;
1327 }
1328
1329
1330 /*****************
1331 * Net device ops
1332 *****************/
1333
1334 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1335 {
1336 ctx->data.str_val = team->mode->kind;
1337 return 0;
1338 }
1339
1340 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1341 {
1342 return team_change_mode(team, ctx->data.str_val);
1343 }
1344
1345 static int team_notify_peers_count_get(struct team *team,
1346 struct team_gsetter_ctx *ctx)
1347 {
1348 ctx->data.u32_val = team->notify_peers.count;
1349 return 0;
1350 }
1351
1352 static int team_notify_peers_count_set(struct team *team,
1353 struct team_gsetter_ctx *ctx)
1354 {
1355 team->notify_peers.count = ctx->data.u32_val;
1356 return 0;
1357 }
1358
1359 static int team_notify_peers_interval_get(struct team *team,
1360 struct team_gsetter_ctx *ctx)
1361 {
1362 ctx->data.u32_val = team->notify_peers.interval;
1363 return 0;
1364 }
1365
1366 static int team_notify_peers_interval_set(struct team *team,
1367 struct team_gsetter_ctx *ctx)
1368 {
1369 team->notify_peers.interval = ctx->data.u32_val;
1370 return 0;
1371 }
1372
1373 static int team_mcast_rejoin_count_get(struct team *team,
1374 struct team_gsetter_ctx *ctx)
1375 {
1376 ctx->data.u32_val = team->mcast_rejoin.count;
1377 return 0;
1378 }
1379
1380 static int team_mcast_rejoin_count_set(struct team *team,
1381 struct team_gsetter_ctx *ctx)
1382 {
1383 team->mcast_rejoin.count = ctx->data.u32_val;
1384 return 0;
1385 }
1386
1387 static int team_mcast_rejoin_interval_get(struct team *team,
1388 struct team_gsetter_ctx *ctx)
1389 {
1390 ctx->data.u32_val = team->mcast_rejoin.interval;
1391 return 0;
1392 }
1393
1394 static int team_mcast_rejoin_interval_set(struct team *team,
1395 struct team_gsetter_ctx *ctx)
1396 {
1397 team->mcast_rejoin.interval = ctx->data.u32_val;
1398 return 0;
1399 }
1400
1401 static int team_port_en_option_get(struct team *team,
1402 struct team_gsetter_ctx *ctx)
1403 {
1404 struct team_port *port = ctx->info->port;
1405
1406 ctx->data.bool_val = team_port_enabled(port);
1407 return 0;
1408 }
1409
1410 static int team_port_en_option_set(struct team *team,
1411 struct team_gsetter_ctx *ctx)
1412 {
1413 struct team_port *port = ctx->info->port;
1414
1415 if (ctx->data.bool_val)
1416 team_port_enable(team, port);
1417 else
1418 team_port_disable(team, port);
1419 return 0;
1420 }
1421
1422 static int team_user_linkup_option_get(struct team *team,
1423 struct team_gsetter_ctx *ctx)
1424 {
1425 struct team_port *port = ctx->info->port;
1426
1427 ctx->data.bool_val = port->user.linkup;
1428 return 0;
1429 }
1430
1431 static void __team_carrier_check(struct team *team);
1432
1433 static int team_user_linkup_option_set(struct team *team,
1434 struct team_gsetter_ctx *ctx)
1435 {
1436 struct team_port *port = ctx->info->port;
1437
1438 port->user.linkup = ctx->data.bool_val;
1439 team_refresh_port_linkup(port);
1440 __team_carrier_check(port->team);
1441 return 0;
1442 }
1443
1444 static int team_user_linkup_en_option_get(struct team *team,
1445 struct team_gsetter_ctx *ctx)
1446 {
1447 struct team_port *port = ctx->info->port;
1448
1449 ctx->data.bool_val = port->user.linkup_enabled;
1450 return 0;
1451 }
1452
1453 static int team_user_linkup_en_option_set(struct team *team,
1454 struct team_gsetter_ctx *ctx)
1455 {
1456 struct team_port *port = ctx->info->port;
1457
1458 port->user.linkup_enabled = ctx->data.bool_val;
1459 team_refresh_port_linkup(port);
1460 __team_carrier_check(port->team);
1461 return 0;
1462 }
1463
1464 static int team_priority_option_get(struct team *team,
1465 struct team_gsetter_ctx *ctx)
1466 {
1467 struct team_port *port = ctx->info->port;
1468
1469 ctx->data.s32_val = port->priority;
1470 return 0;
1471 }
1472
1473 static int team_priority_option_set(struct team *team,
1474 struct team_gsetter_ctx *ctx)
1475 {
1476 struct team_port *port = ctx->info->port;
1477 s32 priority = ctx->data.s32_val;
1478
1479 if (port->priority == priority)
1480 return 0;
1481 port->priority = priority;
1482 team_queue_override_port_prio_changed(team, port);
1483 return 0;
1484 }
1485
1486 static int team_queue_id_option_get(struct team *team,
1487 struct team_gsetter_ctx *ctx)
1488 {
1489 struct team_port *port = ctx->info->port;
1490
1491 ctx->data.u32_val = port->queue_id;
1492 return 0;
1493 }
1494
1495 static int team_queue_id_option_set(struct team *team,
1496 struct team_gsetter_ctx *ctx)
1497 {
1498 struct team_port *port = ctx->info->port;
1499 u16 new_queue_id = ctx->data.u32_val;
1500
1501 if (port->queue_id == new_queue_id)
1502 return 0;
1503 if (new_queue_id >= team->dev->real_num_tx_queues)
1504 return -EINVAL;
1505 team_queue_override_port_change_queue_id(team, port, new_queue_id);
1506 return 0;
1507 }
1508
1509 static const struct team_option team_options[] = {
1510 {
1511 .name = "mode",
1512 .type = TEAM_OPTION_TYPE_STRING,
1513 .getter = team_mode_option_get,
1514 .setter = team_mode_option_set,
1515 },
1516 {
1517 .name = "notify_peers_count",
1518 .type = TEAM_OPTION_TYPE_U32,
1519 .getter = team_notify_peers_count_get,
1520 .setter = team_notify_peers_count_set,
1521 },
1522 {
1523 .name = "notify_peers_interval",
1524 .type = TEAM_OPTION_TYPE_U32,
1525 .getter = team_notify_peers_interval_get,
1526 .setter = team_notify_peers_interval_set,
1527 },
1528 {
1529 .name = "mcast_rejoin_count",
1530 .type = TEAM_OPTION_TYPE_U32,
1531 .getter = team_mcast_rejoin_count_get,
1532 .setter = team_mcast_rejoin_count_set,
1533 },
1534 {
1535 .name = "mcast_rejoin_interval",
1536 .type = TEAM_OPTION_TYPE_U32,
1537 .getter = team_mcast_rejoin_interval_get,
1538 .setter = team_mcast_rejoin_interval_set,
1539 },
1540 {
1541 .name = "enabled",
1542 .type = TEAM_OPTION_TYPE_BOOL,
1543 .per_port = true,
1544 .getter = team_port_en_option_get,
1545 .setter = team_port_en_option_set,
1546 },
1547 {
1548 .name = "user_linkup",
1549 .type = TEAM_OPTION_TYPE_BOOL,
1550 .per_port = true,
1551 .getter = team_user_linkup_option_get,
1552 .setter = team_user_linkup_option_set,
1553 },
1554 {
1555 .name = "user_linkup_enabled",
1556 .type = TEAM_OPTION_TYPE_BOOL,
1557 .per_port = true,
1558 .getter = team_user_linkup_en_option_get,
1559 .setter = team_user_linkup_en_option_set,
1560 },
1561 {
1562 .name = "priority",
1563 .type = TEAM_OPTION_TYPE_S32,
1564 .per_port = true,
1565 .getter = team_priority_option_get,
1566 .setter = team_priority_option_set,
1567 },
1568 {
1569 .name = "queue_id",
1570 .type = TEAM_OPTION_TYPE_U32,
1571 .per_port = true,
1572 .getter = team_queue_id_option_get,
1573 .setter = team_queue_id_option_set,
1574 },
1575 };
1576
1577 static struct lock_class_key team_netdev_xmit_lock_key;
1578 static struct lock_class_key team_netdev_addr_lock_key;
1579 static struct lock_class_key team_tx_busylock_key;
1580
1581 static void team_set_lockdep_class_one(struct net_device *dev,
1582 struct netdev_queue *txq,
1583 void *unused)
1584 {
1585 lockdep_set_class(&txq->_xmit_lock, &team_netdev_xmit_lock_key);
1586 }
1587
1588 static void team_set_lockdep_class(struct net_device *dev)
1589 {
1590 lockdep_set_class(&dev->addr_list_lock, &team_netdev_addr_lock_key);
1591 netdev_for_each_tx_queue(dev, team_set_lockdep_class_one, NULL);
1592 dev->qdisc_tx_busylock = &team_tx_busylock_key;
1593 }
1594
1595 static int team_init(struct net_device *dev)
1596 {
1597 struct team *team = netdev_priv(dev);
1598 int i;
1599 int err;
1600
1601 team->dev = dev;
1602 mutex_init(&team->lock);
1603 team_set_no_mode(team);
1604
1605 team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1606 if (!team->pcpu_stats)
1607 return -ENOMEM;
1608
1609 for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1610 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1611 INIT_LIST_HEAD(&team->port_list);
1612 err = team_queue_override_init(team);
1613 if (err)
1614 goto err_team_queue_override_init;
1615
1616 team_adjust_ops(team);
1617
1618 INIT_LIST_HEAD(&team->option_list);
1619 INIT_LIST_HEAD(&team->option_inst_list);
1620
1621 team_notify_peers_init(team);
1622 team_mcast_rejoin_init(team);
1623
1624 err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1625 if (err)
1626 goto err_options_register;
1627 netif_carrier_off(dev);
1628
1629 team_set_lockdep_class(dev);
1630
1631 return 0;
1632
1633 err_options_register:
1634 team_mcast_rejoin_fini(team);
1635 team_notify_peers_fini(team);
1636 team_queue_override_fini(team);
1637 err_team_queue_override_init:
1638 free_percpu(team->pcpu_stats);
1639
1640 return err;
1641 }
1642
1643 static void team_uninit(struct net_device *dev)
1644 {
1645 struct team *team = netdev_priv(dev);
1646 struct team_port *port;
1647 struct team_port *tmp;
1648
1649 mutex_lock(&team->lock);
1650 list_for_each_entry_safe(port, tmp, &team->port_list, list)
1651 team_port_del(team, port->dev);
1652
1653 __team_change_mode(team, NULL); /* cleanup */
1654 __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1655 team_mcast_rejoin_fini(team);
1656 team_notify_peers_fini(team);
1657 team_queue_override_fini(team);
1658 mutex_unlock(&team->lock);
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 free_netdev(dev);
1667 }
1668
1669 static int team_open(struct net_device *dev)
1670 {
1671 return 0;
1672 }
1673
1674 static int team_close(struct net_device *dev)
1675 {
1676 return 0;
1677 }
1678
1679 /*
1680 * note: already called with rcu_read_lock
1681 */
1682 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1683 {
1684 struct team *team = netdev_priv(dev);
1685 bool tx_success;
1686 unsigned int len = skb->len;
1687
1688 tx_success = team_queue_override_transmit(team, skb);
1689 if (!tx_success)
1690 tx_success = team->ops.transmit(team, skb);
1691 if (tx_success) {
1692 struct team_pcpu_stats *pcpu_stats;
1693
1694 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1695 u64_stats_update_begin(&pcpu_stats->syncp);
1696 pcpu_stats->tx_packets++;
1697 pcpu_stats->tx_bytes += len;
1698 u64_stats_update_end(&pcpu_stats->syncp);
1699 } else {
1700 this_cpu_inc(team->pcpu_stats->tx_dropped);
1701 }
1702
1703 return NETDEV_TX_OK;
1704 }
1705
1706 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1707 void *accel_priv, 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 struct rtnl_link_stats64 *
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 return stats;
1854 }
1855
1856 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1857 {
1858 struct team *team = netdev_priv(dev);
1859 struct team_port *port;
1860 int err;
1861
1862 /*
1863 * Alhough this is reader, it's guarded by team lock. It's not possible
1864 * to traverse list in reverse under rcu_read_lock
1865 */
1866 mutex_lock(&team->lock);
1867 list_for_each_entry(port, &team->port_list, list) {
1868 err = vlan_vid_add(port->dev, proto, vid);
1869 if (err)
1870 goto unwind;
1871 }
1872 mutex_unlock(&team->lock);
1873
1874 return 0;
1875
1876 unwind:
1877 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1878 vlan_vid_del(port->dev, proto, vid);
1879 mutex_unlock(&team->lock);
1880
1881 return err;
1882 }
1883
1884 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1885 {
1886 struct team *team = netdev_priv(dev);
1887 struct team_port *port;
1888
1889 mutex_lock(&team->lock);
1890 list_for_each_entry(port, &team->port_list, list)
1891 vlan_vid_del(port->dev, proto, vid);
1892 mutex_unlock(&team->lock);
1893
1894 return 0;
1895 }
1896
1897 #ifdef CONFIG_NET_POLL_CONTROLLER
1898 static void team_poll_controller(struct net_device *dev)
1899 {
1900 }
1901
1902 static void __team_netpoll_cleanup(struct team *team)
1903 {
1904 struct team_port *port;
1905
1906 list_for_each_entry(port, &team->port_list, list)
1907 team_port_disable_netpoll(port);
1908 }
1909
1910 static void team_netpoll_cleanup(struct net_device *dev)
1911 {
1912 struct team *team = netdev_priv(dev);
1913
1914 mutex_lock(&team->lock);
1915 __team_netpoll_cleanup(team);
1916 mutex_unlock(&team->lock);
1917 }
1918
1919 static int team_netpoll_setup(struct net_device *dev,
1920 struct netpoll_info *npifo)
1921 {
1922 struct team *team = netdev_priv(dev);
1923 struct team_port *port;
1924 int err = 0;
1925
1926 mutex_lock(&team->lock);
1927 list_for_each_entry(port, &team->port_list, list) {
1928 err = team_port_enable_netpoll(team, port);
1929 if (err) {
1930 __team_netpoll_cleanup(team);
1931 break;
1932 }
1933 }
1934 mutex_unlock(&team->lock);
1935 return err;
1936 }
1937 #endif
1938
1939 static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
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);
1946 mutex_unlock(&team->lock);
1947 return err;
1948 }
1949
1950 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1951 {
1952 struct team *team = netdev_priv(dev);
1953 int err;
1954
1955 mutex_lock(&team->lock);
1956 err = team_port_del(team, port_dev);
1957 mutex_unlock(&team->lock);
1958 return err;
1959 }
1960
1961 static netdev_features_t team_fix_features(struct net_device *dev,
1962 netdev_features_t features)
1963 {
1964 struct team_port *port;
1965 struct team *team = netdev_priv(dev);
1966 netdev_features_t mask;
1967
1968 mask = features;
1969 features &= ~NETIF_F_ONE_FOR_ALL;
1970 features |= NETIF_F_ALL_FOR_ALL;
1971
1972 rcu_read_lock();
1973 list_for_each_entry_rcu(port, &team->port_list, list) {
1974 features = netdev_increment_features(features,
1975 port->dev->features,
1976 mask);
1977 }
1978 rcu_read_unlock();
1979
1980 features = netdev_add_tso_features(features, mask);
1981
1982 return features;
1983 }
1984
1985 static int team_change_carrier(struct net_device *dev, bool new_carrier)
1986 {
1987 struct team *team = netdev_priv(dev);
1988
1989 team->user_carrier_enabled = true;
1990
1991 if (new_carrier)
1992 netif_carrier_on(dev);
1993 else
1994 netif_carrier_off(dev);
1995 return 0;
1996 }
1997
1998 static const struct net_device_ops team_netdev_ops = {
1999 .ndo_init = team_init,
2000 .ndo_uninit = team_uninit,
2001 .ndo_open = team_open,
2002 .ndo_stop = team_close,
2003 .ndo_start_xmit = team_xmit,
2004 .ndo_select_queue = team_select_queue,
2005 .ndo_change_rx_flags = team_change_rx_flags,
2006 .ndo_set_rx_mode = team_set_rx_mode,
2007 .ndo_set_mac_address = team_set_mac_address,
2008 .ndo_change_mtu = team_change_mtu,
2009 .ndo_get_stats64 = team_get_stats64,
2010 .ndo_vlan_rx_add_vid = team_vlan_rx_add_vid,
2011 .ndo_vlan_rx_kill_vid = team_vlan_rx_kill_vid,
2012 #ifdef CONFIG_NET_POLL_CONTROLLER
2013 .ndo_poll_controller = team_poll_controller,
2014 .ndo_netpoll_setup = team_netpoll_setup,
2015 .ndo_netpoll_cleanup = team_netpoll_cleanup,
2016 #endif
2017 .ndo_add_slave = team_add_slave,
2018 .ndo_del_slave = team_del_slave,
2019 .ndo_fix_features = team_fix_features,
2020 .ndo_change_carrier = team_change_carrier,
2021 .ndo_bridge_setlink = switchdev_port_bridge_setlink,
2022 .ndo_bridge_getlink = switchdev_port_bridge_getlink,
2023 .ndo_bridge_dellink = switchdev_port_bridge_dellink,
2024 .ndo_fdb_add = switchdev_port_fdb_add,
2025 .ndo_fdb_del = switchdev_port_fdb_del,
2026 .ndo_fdb_dump = switchdev_port_fdb_dump,
2027 .ndo_features_check = passthru_features_check,
2028 };
2029
2030 /***********************
2031 * ethtool interface
2032 ***********************/
2033
2034 static void team_ethtool_get_drvinfo(struct net_device *dev,
2035 struct ethtool_drvinfo *drvinfo)
2036 {
2037 strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
2038 strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2039 }
2040
2041 static const struct ethtool_ops team_ethtool_ops = {
2042 .get_drvinfo = team_ethtool_get_drvinfo,
2043 .get_link = ethtool_op_get_link,
2044 };
2045
2046 /***********************
2047 * rt netlink interface
2048 ***********************/
2049
2050 static void team_setup_by_port(struct net_device *dev,
2051 struct net_device *port_dev)
2052 {
2053 dev->header_ops = port_dev->header_ops;
2054 dev->type = port_dev->type;
2055 dev->hard_header_len = port_dev->hard_header_len;
2056 dev->addr_len = port_dev->addr_len;
2057 dev->mtu = port_dev->mtu;
2058 memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2059 eth_hw_addr_inherit(dev, port_dev);
2060 }
2061
2062 static int team_dev_type_check_change(struct net_device *dev,
2063 struct net_device *port_dev)
2064 {
2065 struct team *team = netdev_priv(dev);
2066 char *portname = port_dev->name;
2067 int err;
2068
2069 if (dev->type == port_dev->type)
2070 return 0;
2071 if (!list_empty(&team->port_list)) {
2072 netdev_err(dev, "Device %s is of different type\n", portname);
2073 return -EBUSY;
2074 }
2075 err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2076 err = notifier_to_errno(err);
2077 if (err) {
2078 netdev_err(dev, "Refused to change device type\n");
2079 return err;
2080 }
2081 dev_uc_flush(dev);
2082 dev_mc_flush(dev);
2083 team_setup_by_port(dev, port_dev);
2084 call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2085 return 0;
2086 }
2087
2088 static void team_setup(struct net_device *dev)
2089 {
2090 ether_setup(dev);
2091
2092 dev->netdev_ops = &team_netdev_ops;
2093 dev->ethtool_ops = &team_ethtool_ops;
2094 dev->destructor = team_destructor;
2095 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2096 dev->priv_flags |= IFF_NO_QUEUE;
2097 dev->priv_flags |= IFF_TEAM;
2098
2099 /*
2100 * Indicate we support unicast address filtering. That way core won't
2101 * bring us to promisc mode in case a unicast addr is added.
2102 * Let this up to underlay drivers.
2103 */
2104 dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2105
2106 dev->features |= NETIF_F_LLTX;
2107 dev->features |= NETIF_F_GRO;
2108
2109 /* Don't allow team devices to change network namespaces. */
2110 dev->features |= NETIF_F_NETNS_LOCAL;
2111
2112 dev->hw_features = TEAM_VLAN_FEATURES |
2113 NETIF_F_HW_VLAN_CTAG_TX |
2114 NETIF_F_HW_VLAN_CTAG_RX |
2115 NETIF_F_HW_VLAN_CTAG_FILTER;
2116
2117 dev->hw_features |= NETIF_F_GSO_ENCAP_ALL;
2118 dev->features |= dev->hw_features;
2119 }
2120
2121 static int team_newlink(struct net *src_net, struct net_device *dev,
2122 struct nlattr *tb[], struct nlattr *data[])
2123 {
2124 if (tb[IFLA_ADDRESS] == NULL)
2125 eth_hw_addr_random(dev);
2126
2127 return register_netdevice(dev);
2128 }
2129
2130 static int team_validate(struct nlattr *tb[], struct nlattr *data[])
2131 {
2132 if (tb[IFLA_ADDRESS]) {
2133 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2134 return -EINVAL;
2135 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2136 return -EADDRNOTAVAIL;
2137 }
2138 return 0;
2139 }
2140
2141 static unsigned int team_get_num_tx_queues(void)
2142 {
2143 return TEAM_DEFAULT_NUM_TX_QUEUES;
2144 }
2145
2146 static unsigned int team_get_num_rx_queues(void)
2147 {
2148 return TEAM_DEFAULT_NUM_RX_QUEUES;
2149 }
2150
2151 static struct rtnl_link_ops team_link_ops __read_mostly = {
2152 .kind = DRV_NAME,
2153 .priv_size = sizeof(struct team),
2154 .setup = team_setup,
2155 .newlink = team_newlink,
2156 .validate = team_validate,
2157 .get_num_tx_queues = team_get_num_tx_queues,
2158 .get_num_rx_queues = team_get_num_rx_queues,
2159 };
2160
2161
2162 /***********************************
2163 * Generic netlink custom interface
2164 ***********************************/
2165
2166 static struct genl_family team_nl_family = {
2167 .id = GENL_ID_GENERATE,
2168 .name = TEAM_GENL_NAME,
2169 .version = TEAM_GENL_VERSION,
2170 .maxattr = TEAM_ATTR_MAX,
2171 .netnsok = true,
2172 };
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 return -EMSGSIZE;
2384
2385 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2386 goto nla_put_failure;
2387 option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2388 if (!option_list)
2389 goto nla_put_failure;
2390
2391 i = 0;
2392 incomplete = false;
2393 list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2394 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2395 if (err) {
2396 if (err == -EMSGSIZE) {
2397 if (!i)
2398 goto errout;
2399 incomplete = true;
2400 break;
2401 }
2402 goto errout;
2403 }
2404 i++;
2405 }
2406
2407 nla_nest_end(skb, option_list);
2408 genlmsg_end(skb, hdr);
2409 if (incomplete)
2410 goto start_again;
2411
2412 send_done:
2413 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2414 if (!nlh) {
2415 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2416 if (err)
2417 goto errout;
2418 goto send_done;
2419 }
2420
2421 return send_func(skb, team, portid);
2422
2423 nla_put_failure:
2424 err = -EMSGSIZE;
2425 errout:
2426 genlmsg_cancel(skb, hdr);
2427 nlmsg_free(skb);
2428 return err;
2429 }
2430
2431 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2432 {
2433 struct team *team;
2434 struct team_option_inst *opt_inst;
2435 int err;
2436 LIST_HEAD(sel_opt_inst_list);
2437
2438 team = team_nl_team_get(info);
2439 if (!team)
2440 return -EINVAL;
2441
2442 list_for_each_entry(opt_inst, &team->option_inst_list, list)
2443 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2444 err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2445 NLM_F_ACK, team_nl_send_unicast,
2446 &sel_opt_inst_list);
2447
2448 team_nl_team_put(team);
2449
2450 return err;
2451 }
2452
2453 static int team_nl_send_event_options_get(struct team *team,
2454 struct list_head *sel_opt_inst_list);
2455
2456 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2457 {
2458 struct team *team;
2459 int err = 0;
2460 int i;
2461 struct nlattr *nl_option;
2462 LIST_HEAD(opt_inst_list);
2463
2464 rtnl_lock();
2465
2466 team = team_nl_team_get(info);
2467 if (!team) {
2468 err = -EINVAL;
2469 goto rtnl_unlock;
2470 }
2471
2472 err = -EINVAL;
2473 if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2474 err = -EINVAL;
2475 goto team_put;
2476 }
2477
2478 nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2479 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2480 struct nlattr *attr;
2481 struct nlattr *attr_data;
2482 enum team_option_type opt_type;
2483 int opt_port_ifindex = 0; /* != 0 for per-port options */
2484 u32 opt_array_index = 0;
2485 bool opt_is_array = false;
2486 struct team_option_inst *opt_inst;
2487 char *opt_name;
2488 bool opt_found = false;
2489
2490 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2491 err = -EINVAL;
2492 goto team_put;
2493 }
2494 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2495 nl_option, team_nl_option_policy);
2496 if (err)
2497 goto team_put;
2498 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2499 !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2500 err = -EINVAL;
2501 goto team_put;
2502 }
2503 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2504 case NLA_U32:
2505 opt_type = TEAM_OPTION_TYPE_U32;
2506 break;
2507 case NLA_STRING:
2508 opt_type = TEAM_OPTION_TYPE_STRING;
2509 break;
2510 case NLA_BINARY:
2511 opt_type = TEAM_OPTION_TYPE_BINARY;
2512 break;
2513 case NLA_FLAG:
2514 opt_type = TEAM_OPTION_TYPE_BOOL;
2515 break;
2516 case NLA_S32:
2517 opt_type = TEAM_OPTION_TYPE_S32;
2518 break;
2519 default:
2520 goto team_put;
2521 }
2522
2523 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2524 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2525 err = -EINVAL;
2526 goto team_put;
2527 }
2528
2529 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2530 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2531 if (attr)
2532 opt_port_ifindex = nla_get_u32(attr);
2533
2534 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2535 if (attr) {
2536 opt_is_array = true;
2537 opt_array_index = nla_get_u32(attr);
2538 }
2539
2540 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2541 struct team_option *option = opt_inst->option;
2542 struct team_gsetter_ctx ctx;
2543 struct team_option_inst_info *opt_inst_info;
2544 int tmp_ifindex;
2545
2546 opt_inst_info = &opt_inst->info;
2547 tmp_ifindex = opt_inst_info->port ?
2548 opt_inst_info->port->dev->ifindex : 0;
2549 if (option->type != opt_type ||
2550 strcmp(option->name, opt_name) ||
2551 tmp_ifindex != opt_port_ifindex ||
2552 (option->array_size && !opt_is_array) ||
2553 opt_inst_info->array_index != opt_array_index)
2554 continue;
2555 opt_found = true;
2556 ctx.info = opt_inst_info;
2557 switch (opt_type) {
2558 case TEAM_OPTION_TYPE_U32:
2559 ctx.data.u32_val = nla_get_u32(attr_data);
2560 break;
2561 case TEAM_OPTION_TYPE_STRING:
2562 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2563 err = -EINVAL;
2564 goto team_put;
2565 }
2566 ctx.data.str_val = nla_data(attr_data);
2567 break;
2568 case TEAM_OPTION_TYPE_BINARY:
2569 ctx.data.bin_val.len = nla_len(attr_data);
2570 ctx.data.bin_val.ptr = nla_data(attr_data);
2571 break;
2572 case TEAM_OPTION_TYPE_BOOL:
2573 ctx.data.bool_val = attr_data ? true : false;
2574 break;
2575 case TEAM_OPTION_TYPE_S32:
2576 ctx.data.s32_val = nla_get_s32(attr_data);
2577 break;
2578 default:
2579 BUG();
2580 }
2581 err = team_option_set(team, opt_inst, &ctx);
2582 if (err)
2583 goto team_put;
2584 opt_inst->changed = true;
2585 list_add(&opt_inst->tmp_list, &opt_inst_list);
2586 }
2587 if (!opt_found) {
2588 err = -ENOENT;
2589 goto team_put;
2590 }
2591 }
2592
2593 err = team_nl_send_event_options_get(team, &opt_inst_list);
2594
2595 team_put:
2596 team_nl_team_put(team);
2597 rtnl_unlock:
2598 rtnl_unlock();
2599 return err;
2600 }
2601
2602 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2603 struct team_port *port)
2604 {
2605 struct nlattr *port_item;
2606
2607 port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2608 if (!port_item)
2609 goto nest_cancel;
2610 if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2611 goto nest_cancel;
2612 if (port->changed) {
2613 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2614 goto nest_cancel;
2615 port->changed = false;
2616 }
2617 if ((port->removed &&
2618 nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2619 (port->state.linkup &&
2620 nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2621 nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2622 nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2623 goto nest_cancel;
2624 nla_nest_end(skb, port_item);
2625 return 0;
2626
2627 nest_cancel:
2628 nla_nest_cancel(skb, port_item);
2629 return -EMSGSIZE;
2630 }
2631
2632 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2633 int flags, team_nl_send_func_t *send_func,
2634 struct team_port *one_port)
2635 {
2636 struct nlattr *port_list;
2637 struct nlmsghdr *nlh;
2638 void *hdr;
2639 struct team_port *port;
2640 int err;
2641 struct sk_buff *skb = NULL;
2642 bool incomplete;
2643 int i;
2644
2645 port = list_first_entry_or_null(&team->port_list,
2646 struct team_port, list);
2647
2648 start_again:
2649 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2650 if (err)
2651 return err;
2652
2653 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2654 TEAM_CMD_PORT_LIST_GET);
2655 if (!hdr)
2656 return -EMSGSIZE;
2657
2658 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2659 goto nla_put_failure;
2660 port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2661 if (!port_list)
2662 goto nla_put_failure;
2663
2664 i = 0;
2665 incomplete = false;
2666
2667 /* If one port is selected, called wants to send port list containing
2668 * only this port. Otherwise go through all listed ports and send all
2669 */
2670 if (one_port) {
2671 err = team_nl_fill_one_port_get(skb, one_port);
2672 if (err)
2673 goto errout;
2674 } else if (port) {
2675 list_for_each_entry_from(port, &team->port_list, list) {
2676 err = team_nl_fill_one_port_get(skb, port);
2677 if (err) {
2678 if (err == -EMSGSIZE) {
2679 if (!i)
2680 goto errout;
2681 incomplete = true;
2682 break;
2683 }
2684 goto errout;
2685 }
2686 i++;
2687 }
2688 }
2689
2690 nla_nest_end(skb, port_list);
2691 genlmsg_end(skb, hdr);
2692 if (incomplete)
2693 goto start_again;
2694
2695 send_done:
2696 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2697 if (!nlh) {
2698 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2699 if (err)
2700 goto errout;
2701 goto send_done;
2702 }
2703
2704 return send_func(skb, team, portid);
2705
2706 nla_put_failure:
2707 err = -EMSGSIZE;
2708 errout:
2709 genlmsg_cancel(skb, hdr);
2710 nlmsg_free(skb);
2711 return err;
2712 }
2713
2714 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2715 struct genl_info *info)
2716 {
2717 struct team *team;
2718 int err;
2719
2720 team = team_nl_team_get(info);
2721 if (!team)
2722 return -EINVAL;
2723
2724 err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2725 NLM_F_ACK, team_nl_send_unicast, NULL);
2726
2727 team_nl_team_put(team);
2728
2729 return err;
2730 }
2731
2732 static const struct genl_ops team_nl_ops[] = {
2733 {
2734 .cmd = TEAM_CMD_NOOP,
2735 .doit = team_nl_cmd_noop,
2736 .policy = team_nl_policy,
2737 },
2738 {
2739 .cmd = TEAM_CMD_OPTIONS_SET,
2740 .doit = team_nl_cmd_options_set,
2741 .policy = team_nl_policy,
2742 .flags = GENL_ADMIN_PERM,
2743 },
2744 {
2745 .cmd = TEAM_CMD_OPTIONS_GET,
2746 .doit = team_nl_cmd_options_get,
2747 .policy = team_nl_policy,
2748 .flags = GENL_ADMIN_PERM,
2749 },
2750 {
2751 .cmd = TEAM_CMD_PORT_LIST_GET,
2752 .doit = team_nl_cmd_port_list_get,
2753 .policy = team_nl_policy,
2754 .flags = GENL_ADMIN_PERM,
2755 },
2756 };
2757
2758 static const struct genl_multicast_group team_nl_mcgrps[] = {
2759 { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2760 };
2761
2762 static int team_nl_send_multicast(struct sk_buff *skb,
2763 struct team *team, u32 portid)
2764 {
2765 return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2766 skb, 0, 0, GFP_KERNEL);
2767 }
2768
2769 static int team_nl_send_event_options_get(struct team *team,
2770 struct list_head *sel_opt_inst_list)
2771 {
2772 return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2773 sel_opt_inst_list);
2774 }
2775
2776 static int team_nl_send_event_port_get(struct team *team,
2777 struct team_port *port)
2778 {
2779 return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2780 port);
2781 }
2782
2783 static int team_nl_init(void)
2784 {
2785 return genl_register_family_with_ops_groups(&team_nl_family, team_nl_ops,
2786 team_nl_mcgrps);
2787 }
2788
2789 static void team_nl_fini(void)
2790 {
2791 genl_unregister_family(&team_nl_family);
2792 }
2793
2794
2795 /******************
2796 * Change checkers
2797 ******************/
2798
2799 static void __team_options_change_check(struct team *team)
2800 {
2801 int err;
2802 struct team_option_inst *opt_inst;
2803 LIST_HEAD(sel_opt_inst_list);
2804
2805 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2806 if (opt_inst->changed)
2807 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2808 }
2809 err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2810 if (err && err != -ESRCH)
2811 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2812 err);
2813 }
2814
2815 /* rtnl lock is held */
2816
2817 static void __team_port_change_send(struct team_port *port, bool linkup)
2818 {
2819 int err;
2820
2821 port->changed = true;
2822 port->state.linkup = linkup;
2823 team_refresh_port_linkup(port);
2824 if (linkup) {
2825 struct ethtool_link_ksettings ecmd;
2826
2827 err = __ethtool_get_link_ksettings(port->dev, &ecmd);
2828 if (!err) {
2829 port->state.speed = ecmd.base.speed;
2830 port->state.duplex = ecmd.base.duplex;
2831 goto send_event;
2832 }
2833 }
2834 port->state.speed = 0;
2835 port->state.duplex = 0;
2836
2837 send_event:
2838 err = team_nl_send_event_port_get(port->team, port);
2839 if (err && err != -ESRCH)
2840 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2841 port->dev->name, err);
2842
2843 }
2844
2845 static void __team_carrier_check(struct team *team)
2846 {
2847 struct team_port *port;
2848 bool team_linkup;
2849
2850 if (team->user_carrier_enabled)
2851 return;
2852
2853 team_linkup = false;
2854 list_for_each_entry(port, &team->port_list, list) {
2855 if (port->linkup) {
2856 team_linkup = true;
2857 break;
2858 }
2859 }
2860
2861 if (team_linkup)
2862 netif_carrier_on(team->dev);
2863 else
2864 netif_carrier_off(team->dev);
2865 }
2866
2867 static void __team_port_change_check(struct team_port *port, bool linkup)
2868 {
2869 if (port->state.linkup != linkup)
2870 __team_port_change_send(port, linkup);
2871 __team_carrier_check(port->team);
2872 }
2873
2874 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2875 {
2876 __team_port_change_send(port, linkup);
2877 __team_carrier_check(port->team);
2878 }
2879
2880 static void __team_port_change_port_removed(struct team_port *port)
2881 {
2882 port->removed = true;
2883 __team_port_change_send(port, false);
2884 __team_carrier_check(port->team);
2885 }
2886
2887 static void team_port_change_check(struct team_port *port, bool linkup)
2888 {
2889 struct team *team = port->team;
2890
2891 mutex_lock(&team->lock);
2892 __team_port_change_check(port, linkup);
2893 mutex_unlock(&team->lock);
2894 }
2895
2896
2897 /************************************
2898 * Net device notifier event handler
2899 ************************************/
2900
2901 static int team_device_event(struct notifier_block *unused,
2902 unsigned long event, void *ptr)
2903 {
2904 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2905 struct team_port *port;
2906
2907 port = team_port_get_rtnl(dev);
2908 if (!port)
2909 return NOTIFY_DONE;
2910
2911 switch (event) {
2912 case NETDEV_UP:
2913 if (netif_carrier_ok(dev))
2914 team_port_change_check(port, true);
2915 break;
2916 case NETDEV_DOWN:
2917 team_port_change_check(port, false);
2918 break;
2919 case NETDEV_CHANGE:
2920 if (netif_running(port->dev))
2921 team_port_change_check(port,
2922 !!netif_carrier_ok(port->dev));
2923 break;
2924 case NETDEV_UNREGISTER:
2925 team_del_slave(port->team->dev, dev);
2926 break;
2927 case NETDEV_FEAT_CHANGE:
2928 team_compute_features(port->team);
2929 break;
2930 case NETDEV_PRECHANGEMTU:
2931 /* Forbid to change mtu of underlaying device */
2932 if (!port->team->port_mtu_change_allowed)
2933 return NOTIFY_BAD;
2934 break;
2935 case NETDEV_PRE_TYPE_CHANGE:
2936 /* Forbid to change type of underlaying device */
2937 return NOTIFY_BAD;
2938 case NETDEV_RESEND_IGMP:
2939 /* Propagate to master device */
2940 call_netdevice_notifiers(event, port->team->dev);
2941 break;
2942 }
2943 return NOTIFY_DONE;
2944 }
2945
2946 static struct notifier_block team_notifier_block __read_mostly = {
2947 .notifier_call = team_device_event,
2948 };
2949
2950
2951 /***********************
2952 * Module init and exit
2953 ***********************/
2954
2955 static int __init team_module_init(void)
2956 {
2957 int err;
2958
2959 register_netdevice_notifier(&team_notifier_block);
2960
2961 err = rtnl_link_register(&team_link_ops);
2962 if (err)
2963 goto err_rtnl_reg;
2964
2965 err = team_nl_init();
2966 if (err)
2967 goto err_nl_init;
2968
2969 return 0;
2970
2971 err_nl_init:
2972 rtnl_link_unregister(&team_link_ops);
2973
2974 err_rtnl_reg:
2975 unregister_netdevice_notifier(&team_notifier_block);
2976
2977 return err;
2978 }
2979
2980 static void __exit team_module_exit(void)
2981 {
2982 team_nl_fini();
2983 rtnl_link_unregister(&team_link_ops);
2984 unregister_netdevice_notifier(&team_notifier_block);
2985 }
2986
2987 module_init(team_module_init);
2988 module_exit(team_module_exit);
2989
2990 MODULE_LICENSE("GPL v2");
2991 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
2992 MODULE_DESCRIPTION("Ethernet team device driver");
2993 MODULE_ALIAS_RTNL_LINK(DRV_NAME);
Linux kernel - Deliverables
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