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samples/bpf: add a test for bpf_override_return
[linux/fpc-iii.git] / drivers / net / team / team.c
bloba468439969df7f7166c3116bfaa543f82ae52c91
1 /*
2 * drivers/net/team/team.c - Network team device driver
3 * Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 */
10
11 #include <linux/kernel.h>
12 #include <linux/types.h>
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/slab.h>
16 #include <linux/rcupdate.h>
17 #include <linux/errno.h>
18 #include <linux/ctype.h>
19 #include <linux/notifier.h>
20 #include <linux/netdevice.h>
21 #include <linux/netpoll.h>
22 #include <linux/if_vlan.h>
23 #include <linux/if_arp.h>
24 #include <linux/socket.h>
25 #include <linux/etherdevice.h>
26 #include <linux/rtnetlink.h>
27 #include <net/rtnetlink.h>
28 #include <net/genetlink.h>
29 #include <net/netlink.h>
30 #include <net/sch_generic.h>
31 #include <net/switchdev.h>
32 #include <generated/utsrelease.h>
33 #include <linux/if_team.h>
34
35 #define DRV_NAME "team"
36
37
38 /**********
39 * Helpers
40 **********/
41
42 #define team_port_exists(dev) (dev->priv_flags & IFF_TEAM_PORT)
43
44 static struct team_port *team_port_get_rcu(const struct net_device *dev)
45 {
46 return rcu_dereference(dev->rx_handler_data);
47 }
48
49 static struct team_port *team_port_get_rtnl(const struct net_device *dev)
50 {
51 struct team_port *port = rtnl_dereference(dev->rx_handler_data);
52
53 return team_port_exists(dev) ? port : NULL;
54 }
55
56 /*
57 * Since the ability to change device address for open port device is tested in
58 * team_port_add, this function can be called without control of return value
59 */
60 static int __set_port_dev_addr(struct net_device *port_dev,
61 const unsigned char *dev_addr)
62 {
63 struct sockaddr_storage addr;
64
65 memcpy(addr.__data, dev_addr, port_dev->addr_len);
66 addr.ss_family = port_dev->type;
67 return dev_set_mac_address(port_dev, (struct sockaddr *)&addr);
68 }
69
70 static int team_port_set_orig_dev_addr(struct team_port *port)
71 {
72 return __set_port_dev_addr(port->dev, port->orig.dev_addr);
73 }
74
75 static int team_port_set_team_dev_addr(struct team *team,
76 struct team_port *port)
77 {
78 return __set_port_dev_addr(port->dev, team->dev->dev_addr);
79 }
80
81 int team_modeop_port_enter(struct team *team, struct team_port *port)
82 {
83 return team_port_set_team_dev_addr(team, port);
84 }
85 EXPORT_SYMBOL(team_modeop_port_enter);
86
87 void team_modeop_port_change_dev_addr(struct team *team,
88 struct team_port *port)
89 {
90 team_port_set_team_dev_addr(team, port);
91 }
92 EXPORT_SYMBOL(team_modeop_port_change_dev_addr);
93
94 static void team_lower_state_changed(struct team_port *port)
95 {
96 struct netdev_lag_lower_state_info info;
97
98 info.link_up = port->linkup;
99 info.tx_enabled = team_port_enabled(port);
100 netdev_lower_state_changed(port->dev, &info);
101 }
102
103 static void team_refresh_port_linkup(struct team_port *port)
104 {
105 bool new_linkup = port->user.linkup_enabled ? port->user.linkup :
106 port->state.linkup;
107
108 if (port->linkup != new_linkup) {
109 port->linkup = new_linkup;
110 team_lower_state_changed(port);
111 }
112 }
113
114
115 /*******************
116 * Options handling
117 *******************/
118
119 struct team_option_inst { /* One for each option instance */
120 struct list_head list;
121 struct list_head tmp_list;
122 struct team_option *option;
123 struct team_option_inst_info info;
124 bool changed;
125 bool removed;
126 };
127
128 static struct team_option *__team_find_option(struct team *team,
129 const char *opt_name)
130 {
131 struct team_option *option;
132
133 list_for_each_entry(option, &team->option_list, list) {
134 if (strcmp(option->name, opt_name) == 0)
135 return option;
136 }
137 return NULL;
138 }
139
140 static void __team_option_inst_del(struct team_option_inst *opt_inst)
141 {
142 list_del(&opt_inst->list);
143 kfree(opt_inst);
144 }
145
146 static void __team_option_inst_del_option(struct team *team,
147 struct team_option *option)
148 {
149 struct team_option_inst *opt_inst, *tmp;
150
151 list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
152 if (opt_inst->option == option)
153 __team_option_inst_del(opt_inst);
154 }
155 }
156
157 static int __team_option_inst_add(struct team *team, struct team_option *option,
158 struct team_port *port)
159 {
160 struct team_option_inst *opt_inst;
161 unsigned int array_size;
162 unsigned int i;
163 int err;
164
165 array_size = option->array_size;
166 if (!array_size)
167 array_size = 1; /* No array but still need one instance */
168
169 for (i = 0; i < array_size; i++) {
170 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL);
171 if (!opt_inst)
172 return -ENOMEM;
173 opt_inst->option = option;
174 opt_inst->info.port = port;
175 opt_inst->info.array_index = i;
176 opt_inst->changed = true;
177 opt_inst->removed = false;
178 list_add_tail(&opt_inst->list, &team->option_inst_list);
179 if (option->init) {
180 err = option->init(team, &opt_inst->info);
181 if (err)
182 return err;
183 }
184
185 }
186 return 0;
187 }
188
189 static int __team_option_inst_add_option(struct team *team,
190 struct team_option *option)
191 {
192 int err;
193
194 if (!option->per_port) {
195 err = __team_option_inst_add(team, option, NULL);
196 if (err)
197 goto inst_del_option;
198 }
199 return 0;
200
201 inst_del_option:
202 __team_option_inst_del_option(team, option);
203 return err;
204 }
205
206 static void __team_option_inst_mark_removed_option(struct team *team,
207 struct team_option *option)
208 {
209 struct team_option_inst *opt_inst;
210
211 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
212 if (opt_inst->option == option) {
213 opt_inst->changed = true;
214 opt_inst->removed = true;
215 }
216 }
217 }
218
219 static void __team_option_inst_del_port(struct team *team,
220 struct team_port *port)
221 {
222 struct team_option_inst *opt_inst, *tmp;
223
224 list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
225 if (opt_inst->option->per_port &&
226 opt_inst->info.port == port)
227 __team_option_inst_del(opt_inst);
228 }
229 }
230
231 static int __team_option_inst_add_port(struct team *team,
232 struct team_port *port)
233 {
234 struct team_option *option;
235 int err;
236
237 list_for_each_entry(option, &team->option_list, list) {
238 if (!option->per_port)
239 continue;
240 err = __team_option_inst_add(team, option, port);
241 if (err)
242 goto inst_del_port;
243 }
244 return 0;
245
246 inst_del_port:
247 __team_option_inst_del_port(team, port);
248 return err;
249 }
250
251 static void __team_option_inst_mark_removed_port(struct team *team,
252 struct team_port *port)
253 {
254 struct team_option_inst *opt_inst;
255
256 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
257 if (opt_inst->info.port == port) {
258 opt_inst->changed = true;
259 opt_inst->removed = true;
260 }
261 }
262 }
263
264 static 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 mutex_lock(&team->lock);
1029 __team_compute_features(team);
1030 mutex_unlock(&team->lock);
1031 netdev_change_features(team->dev);
1032 }
1033
1034 static int team_port_enter(struct team *team, struct team_port *port)
1035 {
1036 int err = 0;
1037
1038 dev_hold(team->dev);
1039 if (team->ops.port_enter) {
1040 err = team->ops.port_enter(team, port);
1041 if (err) {
1042 netdev_err(team->dev, "Device %s failed to enter team mode\n",
1043 port->dev->name);
1044 goto err_port_enter;
1045 }
1046 }
1047
1048 return 0;
1049
1050 err_port_enter:
1051 dev_put(team->dev);
1052
1053 return err;
1054 }
1055
1056 static void team_port_leave(struct team *team, struct team_port *port)
1057 {
1058 if (team->ops.port_leave)
1059 team->ops.port_leave(team, port);
1060 dev_put(team->dev);
1061 }
1062
1063 #ifdef CONFIG_NET_POLL_CONTROLLER
1064 static int team_port_enable_netpoll(struct team *team, struct team_port *port)
1065 {
1066 struct netpoll *np;
1067 int err;
1068
1069 if (!team->dev->npinfo)
1070 return 0;
1071
1072 np = kzalloc(sizeof(*np), GFP_KERNEL);
1073 if (!np)
1074 return -ENOMEM;
1075
1076 err = __netpoll_setup(np, port->dev);
1077 if (err) {
1078 kfree(np);
1079 return err;
1080 }
1081 port->np = np;
1082 return err;
1083 }
1084
1085 static void team_port_disable_netpoll(struct team_port *port)
1086 {
1087 struct netpoll *np = port->np;
1088
1089 if (!np)
1090 return;
1091 port->np = NULL;
1092
1093 /* Wait for transmitting packets to finish before freeing. */
1094 synchronize_rcu_bh();
1095 __netpoll_cleanup(np);
1096 kfree(np);
1097 }
1098 #else
1099 static int team_port_enable_netpoll(struct team *team, struct team_port *port)
1100 {
1101 return 0;
1102 }
1103 static void team_port_disable_netpoll(struct team_port *port)
1104 {
1105 }
1106 #endif
1107
1108 static int team_upper_dev_link(struct team *team, struct team_port *port)
1109 {
1110 struct netdev_lag_upper_info lag_upper_info;
1111 int err;
1112
1113 lag_upper_info.tx_type = team->mode->lag_tx_type;
1114 err = netdev_master_upper_dev_link(port->dev, team->dev, NULL,
1115 &lag_upper_info, NULL);
1116 if (err)
1117 return err;
1118 port->dev->priv_flags |= IFF_TEAM_PORT;
1119 return 0;
1120 }
1121
1122 static void team_upper_dev_unlink(struct team *team, struct team_port *port)
1123 {
1124 netdev_upper_dev_unlink(port->dev, team->dev);
1125 port->dev->priv_flags &= ~IFF_TEAM_PORT;
1126 }
1127
1128 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1129 static int team_dev_type_check_change(struct net_device *dev,
1130 struct net_device *port_dev);
1131
1132 static int team_port_add(struct team *team, struct net_device *port_dev)
1133 {
1134 struct net_device *dev = team->dev;
1135 struct team_port *port;
1136 char *portname = port_dev->name;
1137 int err;
1138
1139 if (port_dev->flags & IFF_LOOPBACK) {
1140 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1141 portname);
1142 return -EINVAL;
1143 }
1144
1145 if (team_port_exists(port_dev)) {
1146 netdev_err(dev, "Device %s is already a port "
1147 "of a team device\n", portname);
1148 return -EBUSY;
1149 }
1150
1151 if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1152 vlan_uses_dev(dev)) {
1153 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1154 portname);
1155 return -EPERM;
1156 }
1157
1158 err = team_dev_type_check_change(dev, port_dev);
1159 if (err)
1160 return err;
1161
1162 if (port_dev->flags & IFF_UP) {
1163 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1164 portname);
1165 return -EBUSY;
1166 }
1167
1168 port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1169 GFP_KERNEL);
1170 if (!port)
1171 return -ENOMEM;
1172
1173 port->dev = port_dev;
1174 port->team = team;
1175 INIT_LIST_HEAD(&port->qom_list);
1176
1177 port->orig.mtu = port_dev->mtu;
1178 err = dev_set_mtu(port_dev, dev->mtu);
1179 if (err) {
1180 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1181 goto err_set_mtu;
1182 }
1183
1184 memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1185
1186 err = team_port_enter(team, port);
1187 if (err) {
1188 netdev_err(dev, "Device %s failed to enter team mode\n",
1189 portname);
1190 goto err_port_enter;
1191 }
1192
1193 err = dev_open(port_dev);
1194 if (err) {
1195 netdev_dbg(dev, "Device %s opening failed\n",
1196 portname);
1197 goto err_dev_open;
1198 }
1199
1200 netif_addr_lock_bh(dev);
1201 dev_uc_sync_multiple(port_dev, dev);
1202 dev_mc_sync_multiple(port_dev, dev);
1203 netif_addr_unlock_bh(dev);
1204
1205 err = vlan_vids_add_by_dev(port_dev, dev);
1206 if (err) {
1207 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1208 portname);
1209 goto err_vids_add;
1210 }
1211
1212 err = team_port_enable_netpoll(team, port);
1213 if (err) {
1214 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1215 portname);
1216 goto err_enable_netpoll;
1217 }
1218
1219 if (!(dev->features & NETIF_F_LRO))
1220 dev_disable_lro(port_dev);
1221
1222 err = netdev_rx_handler_register(port_dev, team_handle_frame,
1223 port);
1224 if (err) {
1225 netdev_err(dev, "Device %s failed to register rx_handler\n",
1226 portname);
1227 goto err_handler_register;
1228 }
1229
1230 err = team_upper_dev_link(team, port);
1231 if (err) {
1232 netdev_err(dev, "Device %s failed to set upper link\n",
1233 portname);
1234 goto err_set_upper_link;
1235 }
1236
1237 err = __team_option_inst_add_port(team, port);
1238 if (err) {
1239 netdev_err(dev, "Device %s failed to add per-port options\n",
1240 portname);
1241 goto err_option_port_add;
1242 }
1243
1244 port->index = -1;
1245 list_add_tail_rcu(&port->list, &team->port_list);
1246 team_port_enable(team, port);
1247 __team_compute_features(team);
1248 __team_port_change_port_added(port, !!netif_carrier_ok(port_dev));
1249 __team_options_change_check(team);
1250
1251 netdev_info(dev, "Port device %s added\n", portname);
1252
1253 return 0;
1254
1255 err_option_port_add:
1256 team_upper_dev_unlink(team, port);
1257
1258 err_set_upper_link:
1259 netdev_rx_handler_unregister(port_dev);
1260
1261 err_handler_register:
1262 team_port_disable_netpoll(port);
1263
1264 err_enable_netpoll:
1265 vlan_vids_del_by_dev(port_dev, dev);
1266
1267 err_vids_add:
1268 dev_uc_unsync(port_dev, dev);
1269 dev_mc_unsync(port_dev, dev);
1270 dev_close(port_dev);
1271
1272 err_dev_open:
1273 team_port_leave(team, port);
1274 team_port_set_orig_dev_addr(port);
1275
1276 err_port_enter:
1277 dev_set_mtu(port_dev, port->orig.mtu);
1278
1279 err_set_mtu:
1280 kfree(port);
1281
1282 return err;
1283 }
1284
1285 static void __team_port_change_port_removed(struct team_port *port);
1286
1287 static int team_port_del(struct team *team, struct net_device *port_dev)
1288 {
1289 struct net_device *dev = team->dev;
1290 struct team_port *port;
1291 char *portname = port_dev->name;
1292
1293 port = team_port_get_rtnl(port_dev);
1294 if (!port || !team_port_find(team, port)) {
1295 netdev_err(dev, "Device %s does not act as a port of this team\n",
1296 portname);
1297 return -ENOENT;
1298 }
1299
1300 team_port_disable(team, port);
1301 list_del_rcu(&port->list);
1302 team_upper_dev_unlink(team, port);
1303 netdev_rx_handler_unregister(port_dev);
1304 team_port_disable_netpoll(port);
1305 vlan_vids_del_by_dev(port_dev, dev);
1306 dev_uc_unsync(port_dev, dev);
1307 dev_mc_unsync(port_dev, dev);
1308 dev_close(port_dev);
1309 team_port_leave(team, port);
1310
1311 __team_option_inst_mark_removed_port(team, port);
1312 __team_options_change_check(team);
1313 __team_option_inst_del_port(team, port);
1314 __team_port_change_port_removed(port);
1315
1316 team_port_set_orig_dev_addr(port);
1317 dev_set_mtu(port_dev, port->orig.mtu);
1318 kfree_rcu(port, rcu);
1319 netdev_info(dev, "Port device %s removed\n", portname);
1320 __team_compute_features(team);
1321
1322 return 0;
1323 }
1324
1325
1326 /*****************
1327 * Net device ops
1328 *****************/
1329
1330 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1331 {
1332 ctx->data.str_val = team->mode->kind;
1333 return 0;
1334 }
1335
1336 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1337 {
1338 return team_change_mode(team, ctx->data.str_val);
1339 }
1340
1341 static int team_notify_peers_count_get(struct team *team,
1342 struct team_gsetter_ctx *ctx)
1343 {
1344 ctx->data.u32_val = team->notify_peers.count;
1345 return 0;
1346 }
1347
1348 static int team_notify_peers_count_set(struct team *team,
1349 struct team_gsetter_ctx *ctx)
1350 {
1351 team->notify_peers.count = ctx->data.u32_val;
1352 return 0;
1353 }
1354
1355 static int team_notify_peers_interval_get(struct team *team,
1356 struct team_gsetter_ctx *ctx)
1357 {
1358 ctx->data.u32_val = team->notify_peers.interval;
1359 return 0;
1360 }
1361
1362 static int team_notify_peers_interval_set(struct team *team,
1363 struct team_gsetter_ctx *ctx)
1364 {
1365 team->notify_peers.interval = ctx->data.u32_val;
1366 return 0;
1367 }
1368
1369 static int team_mcast_rejoin_count_get(struct team *team,
1370 struct team_gsetter_ctx *ctx)
1371 {
1372 ctx->data.u32_val = team->mcast_rejoin.count;
1373 return 0;
1374 }
1375
1376 static int team_mcast_rejoin_count_set(struct team *team,
1377 struct team_gsetter_ctx *ctx)
1378 {
1379 team->mcast_rejoin.count = ctx->data.u32_val;
1380 return 0;
1381 }
1382
1383 static int team_mcast_rejoin_interval_get(struct team *team,
1384 struct team_gsetter_ctx *ctx)
1385 {
1386 ctx->data.u32_val = team->mcast_rejoin.interval;
1387 return 0;
1388 }
1389
1390 static int team_mcast_rejoin_interval_set(struct team *team,
1391 struct team_gsetter_ctx *ctx)
1392 {
1393 team->mcast_rejoin.interval = ctx->data.u32_val;
1394 return 0;
1395 }
1396
1397 static int team_port_en_option_get(struct team *team,
1398 struct team_gsetter_ctx *ctx)
1399 {
1400 struct team_port *port = ctx->info->port;
1401
1402 ctx->data.bool_val = team_port_enabled(port);
1403 return 0;
1404 }
1405
1406 static int team_port_en_option_set(struct team *team,
1407 struct team_gsetter_ctx *ctx)
1408 {
1409 struct team_port *port = ctx->info->port;
1410
1411 if (ctx->data.bool_val)
1412 team_port_enable(team, port);
1413 else
1414 team_port_disable(team, port);
1415 return 0;
1416 }
1417
1418 static int team_user_linkup_option_get(struct team *team,
1419 struct team_gsetter_ctx *ctx)
1420 {
1421 struct team_port *port = ctx->info->port;
1422
1423 ctx->data.bool_val = port->user.linkup;
1424 return 0;
1425 }
1426
1427 static void __team_carrier_check(struct team *team);
1428
1429 static int team_user_linkup_option_set(struct team *team,
1430 struct team_gsetter_ctx *ctx)
1431 {
1432 struct team_port *port = ctx->info->port;
1433
1434 port->user.linkup = ctx->data.bool_val;
1435 team_refresh_port_linkup(port);
1436 __team_carrier_check(port->team);
1437 return 0;
1438 }
1439
1440 static int team_user_linkup_en_option_get(struct team *team,
1441 struct team_gsetter_ctx *ctx)
1442 {
1443 struct team_port *port = ctx->info->port;
1444
1445 ctx->data.bool_val = port->user.linkup_enabled;
1446 return 0;
1447 }
1448
1449 static int team_user_linkup_en_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_enabled = 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_priority_option_get(struct team *team,
1461 struct team_gsetter_ctx *ctx)
1462 {
1463 struct team_port *port = ctx->info->port;
1464
1465 ctx->data.s32_val = port->priority;
1466 return 0;
1467 }
1468
1469 static int team_priority_option_set(struct team *team,
1470 struct team_gsetter_ctx *ctx)
1471 {
1472 struct team_port *port = ctx->info->port;
1473 s32 priority = ctx->data.s32_val;
1474
1475 if (port->priority == priority)
1476 return 0;
1477 port->priority = priority;
1478 team_queue_override_port_prio_changed(team, port);
1479 return 0;
1480 }
1481
1482 static int team_queue_id_option_get(struct team *team,
1483 struct team_gsetter_ctx *ctx)
1484 {
1485 struct team_port *port = ctx->info->port;
1486
1487 ctx->data.u32_val = port->queue_id;
1488 return 0;
1489 }
1490
1491 static int team_queue_id_option_set(struct team *team,
1492 struct team_gsetter_ctx *ctx)
1493 {
1494 struct team_port *port = ctx->info->port;
1495 u16 new_queue_id = ctx->data.u32_val;
1496
1497 if (port->queue_id == new_queue_id)
1498 return 0;
1499 if (new_queue_id >= team->dev->real_num_tx_queues)
1500 return -EINVAL;
1501 team_queue_override_port_change_queue_id(team, port, new_queue_id);
1502 return 0;
1503 }
1504
1505 static const struct team_option team_options[] = {
1506 {
1507 .name = "mode",
1508 .type = TEAM_OPTION_TYPE_STRING,
1509 .getter = team_mode_option_get,
1510 .setter = team_mode_option_set,
1511 },
1512 {
1513 .name = "notify_peers_count",
1514 .type = TEAM_OPTION_TYPE_U32,
1515 .getter = team_notify_peers_count_get,
1516 .setter = team_notify_peers_count_set,
1517 },
1518 {
1519 .name = "notify_peers_interval",
1520 .type = TEAM_OPTION_TYPE_U32,
1521 .getter = team_notify_peers_interval_get,
1522 .setter = team_notify_peers_interval_set,
1523 },
1524 {
1525 .name = "mcast_rejoin_count",
1526 .type = TEAM_OPTION_TYPE_U32,
1527 .getter = team_mcast_rejoin_count_get,
1528 .setter = team_mcast_rejoin_count_set,
1529 },
1530 {
1531 .name = "mcast_rejoin_interval",
1532 .type = TEAM_OPTION_TYPE_U32,
1533 .getter = team_mcast_rejoin_interval_get,
1534 .setter = team_mcast_rejoin_interval_set,
1535 },
1536 {
1537 .name = "enabled",
1538 .type = TEAM_OPTION_TYPE_BOOL,
1539 .per_port = true,
1540 .getter = team_port_en_option_get,
1541 .setter = team_port_en_option_set,
1542 },
1543 {
1544 .name = "user_linkup",
1545 .type = TEAM_OPTION_TYPE_BOOL,
1546 .per_port = true,
1547 .getter = team_user_linkup_option_get,
1548 .setter = team_user_linkup_option_set,
1549 },
1550 {
1551 .name = "user_linkup_enabled",
1552 .type = TEAM_OPTION_TYPE_BOOL,
1553 .per_port = true,
1554 .getter = team_user_linkup_en_option_get,
1555 .setter = team_user_linkup_en_option_set,
1556 },
1557 {
1558 .name = "priority",
1559 .type = TEAM_OPTION_TYPE_S32,
1560 .per_port = true,
1561 .getter = team_priority_option_get,
1562 .setter = team_priority_option_set,
1563 },
1564 {
1565 .name = "queue_id",
1566 .type = TEAM_OPTION_TYPE_U32,
1567 .per_port = true,
1568 .getter = team_queue_id_option_get,
1569 .setter = team_queue_id_option_set,
1570 },
1571 };
1572
1573
1574 static int team_init(struct net_device *dev)
1575 {
1576 struct team *team = netdev_priv(dev);
1577 int i;
1578 int err;
1579
1580 team->dev = dev;
1581 mutex_init(&team->lock);
1582 team_set_no_mode(team);
1583
1584 team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1585 if (!team->pcpu_stats)
1586 return -ENOMEM;
1587
1588 for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1589 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1590 INIT_LIST_HEAD(&team->port_list);
1591 err = team_queue_override_init(team);
1592 if (err)
1593 goto err_team_queue_override_init;
1594
1595 team_adjust_ops(team);
1596
1597 INIT_LIST_HEAD(&team->option_list);
1598 INIT_LIST_HEAD(&team->option_inst_list);
1599
1600 team_notify_peers_init(team);
1601 team_mcast_rejoin_init(team);
1602
1603 err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1604 if (err)
1605 goto err_options_register;
1606 netif_carrier_off(dev);
1607
1608 netdev_lockdep_set_classes(dev);
1609
1610 return 0;
1611
1612 err_options_register:
1613 team_mcast_rejoin_fini(team);
1614 team_notify_peers_fini(team);
1615 team_queue_override_fini(team);
1616 err_team_queue_override_init:
1617 free_percpu(team->pcpu_stats);
1618
1619 return err;
1620 }
1621
1622 static void team_uninit(struct net_device *dev)
1623 {
1624 struct team *team = netdev_priv(dev);
1625 struct team_port *port;
1626 struct team_port *tmp;
1627
1628 mutex_lock(&team->lock);
1629 list_for_each_entry_safe(port, tmp, &team->port_list, list)
1630 team_port_del(team, port->dev);
1631
1632 __team_change_mode(team, NULL); /* cleanup */
1633 __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1634 team_mcast_rejoin_fini(team);
1635 team_notify_peers_fini(team);
1636 team_queue_override_fini(team);
1637 mutex_unlock(&team->lock);
1638 netdev_change_features(dev);
1639 }
1640
1641 static void team_destructor(struct net_device *dev)
1642 {
1643 struct team *team = netdev_priv(dev);
1644
1645 free_percpu(team->pcpu_stats);
1646 }
1647
1648 static int team_open(struct net_device *dev)
1649 {
1650 return 0;
1651 }
1652
1653 static int team_close(struct net_device *dev)
1654 {
1655 return 0;
1656 }
1657
1658 /*
1659 * note: already called with rcu_read_lock
1660 */
1661 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1662 {
1663 struct team *team = netdev_priv(dev);
1664 bool tx_success;
1665 unsigned int len = skb->len;
1666
1667 tx_success = team_queue_override_transmit(team, skb);
1668 if (!tx_success)
1669 tx_success = team->ops.transmit(team, skb);
1670 if (tx_success) {
1671 struct team_pcpu_stats *pcpu_stats;
1672
1673 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1674 u64_stats_update_begin(&pcpu_stats->syncp);
1675 pcpu_stats->tx_packets++;
1676 pcpu_stats->tx_bytes += len;
1677 u64_stats_update_end(&pcpu_stats->syncp);
1678 } else {
1679 this_cpu_inc(team->pcpu_stats->tx_dropped);
1680 }
1681
1682 return NETDEV_TX_OK;
1683 }
1684
1685 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1686 void *accel_priv, select_queue_fallback_t fallback)
1687 {
1688 /*
1689 * This helper function exists to help dev_pick_tx get the correct
1690 * destination queue. Using a helper function skips a call to
1691 * skb_tx_hash and will put the skbs in the queue we expect on their
1692 * way down to the team driver.
1693 */
1694 u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1695
1696 /*
1697 * Save the original txq to restore before passing to the driver
1698 */
1699 qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1700
1701 if (unlikely(txq >= dev->real_num_tx_queues)) {
1702 do {
1703 txq -= dev->real_num_tx_queues;
1704 } while (txq >= dev->real_num_tx_queues);
1705 }
1706 return txq;
1707 }
1708
1709 static void team_change_rx_flags(struct net_device *dev, int change)
1710 {
1711 struct team *team = netdev_priv(dev);
1712 struct team_port *port;
1713 int inc;
1714
1715 rcu_read_lock();
1716 list_for_each_entry_rcu(port, &team->port_list, list) {
1717 if (change & IFF_PROMISC) {
1718 inc = dev->flags & IFF_PROMISC ? 1 : -1;
1719 dev_set_promiscuity(port->dev, inc);
1720 }
1721 if (change & IFF_ALLMULTI) {
1722 inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1723 dev_set_allmulti(port->dev, inc);
1724 }
1725 }
1726 rcu_read_unlock();
1727 }
1728
1729 static void team_set_rx_mode(struct net_device *dev)
1730 {
1731 struct team *team = netdev_priv(dev);
1732 struct team_port *port;
1733
1734 rcu_read_lock();
1735 list_for_each_entry_rcu(port, &team->port_list, list) {
1736 dev_uc_sync_multiple(port->dev, dev);
1737 dev_mc_sync_multiple(port->dev, dev);
1738 }
1739 rcu_read_unlock();
1740 }
1741
1742 static int team_set_mac_address(struct net_device *dev, void *p)
1743 {
1744 struct sockaddr *addr = p;
1745 struct team *team = netdev_priv(dev);
1746 struct team_port *port;
1747
1748 if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1749 return -EADDRNOTAVAIL;
1750 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1751 mutex_lock(&team->lock);
1752 list_for_each_entry(port, &team->port_list, list)
1753 if (team->ops.port_change_dev_addr)
1754 team->ops.port_change_dev_addr(team, port);
1755 mutex_unlock(&team->lock);
1756 return 0;
1757 }
1758
1759 static int team_change_mtu(struct net_device *dev, int new_mtu)
1760 {
1761 struct team *team = netdev_priv(dev);
1762 struct team_port *port;
1763 int err;
1764
1765 /*
1766 * Alhough this is reader, it's guarded by team lock. It's not possible
1767 * to traverse list in reverse under rcu_read_lock
1768 */
1769 mutex_lock(&team->lock);
1770 team->port_mtu_change_allowed = true;
1771 list_for_each_entry(port, &team->port_list, list) {
1772 err = dev_set_mtu(port->dev, new_mtu);
1773 if (err) {
1774 netdev_err(dev, "Device %s failed to change mtu",
1775 port->dev->name);
1776 goto unwind;
1777 }
1778 }
1779 team->port_mtu_change_allowed = false;
1780 mutex_unlock(&team->lock);
1781
1782 dev->mtu = new_mtu;
1783
1784 return 0;
1785
1786 unwind:
1787 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1788 dev_set_mtu(port->dev, dev->mtu);
1789 team->port_mtu_change_allowed = false;
1790 mutex_unlock(&team->lock);
1791
1792 return err;
1793 }
1794
1795 static void
1796 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1797 {
1798 struct team *team = netdev_priv(dev);
1799 struct team_pcpu_stats *p;
1800 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1801 u32 rx_dropped = 0, tx_dropped = 0, rx_nohandler = 0;
1802 unsigned int start;
1803 int i;
1804
1805 for_each_possible_cpu(i) {
1806 p = per_cpu_ptr(team->pcpu_stats, i);
1807 do {
1808 start = u64_stats_fetch_begin_irq(&p->syncp);
1809 rx_packets = p->rx_packets;
1810 rx_bytes = p->rx_bytes;
1811 rx_multicast = p->rx_multicast;
1812 tx_packets = p->tx_packets;
1813 tx_bytes = p->tx_bytes;
1814 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
1815
1816 stats->rx_packets += rx_packets;
1817 stats->rx_bytes += rx_bytes;
1818 stats->multicast += rx_multicast;
1819 stats->tx_packets += tx_packets;
1820 stats->tx_bytes += tx_bytes;
1821 /*
1822 * rx_dropped, tx_dropped & rx_nohandler are u32,
1823 * updated without syncp protection.
1824 */
1825 rx_dropped += p->rx_dropped;
1826 tx_dropped += p->tx_dropped;
1827 rx_nohandler += p->rx_nohandler;
1828 }
1829 stats->rx_dropped = rx_dropped;
1830 stats->tx_dropped = tx_dropped;
1831 stats->rx_nohandler = rx_nohandler;
1832 }
1833
1834 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1835 {
1836 struct team *team = netdev_priv(dev);
1837 struct team_port *port;
1838 int err;
1839
1840 /*
1841 * Alhough this is reader, it's guarded by team lock. It's not possible
1842 * to traverse list in reverse under rcu_read_lock
1843 */
1844 mutex_lock(&team->lock);
1845 list_for_each_entry(port, &team->port_list, list) {
1846 err = vlan_vid_add(port->dev, proto, vid);
1847 if (err)
1848 goto unwind;
1849 }
1850 mutex_unlock(&team->lock);
1851
1852 return 0;
1853
1854 unwind:
1855 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1856 vlan_vid_del(port->dev, proto, vid);
1857 mutex_unlock(&team->lock);
1858
1859 return err;
1860 }
1861
1862 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1863 {
1864 struct team *team = netdev_priv(dev);
1865 struct team_port *port;
1866
1867 mutex_lock(&team->lock);
1868 list_for_each_entry(port, &team->port_list, list)
1869 vlan_vid_del(port->dev, proto, vid);
1870 mutex_unlock(&team->lock);
1871
1872 return 0;
1873 }
1874
1875 #ifdef CONFIG_NET_POLL_CONTROLLER
1876 static void team_poll_controller(struct net_device *dev)
1877 {
1878 }
1879
1880 static void __team_netpoll_cleanup(struct team *team)
1881 {
1882 struct team_port *port;
1883
1884 list_for_each_entry(port, &team->port_list, list)
1885 team_port_disable_netpoll(port);
1886 }
1887
1888 static void team_netpoll_cleanup(struct net_device *dev)
1889 {
1890 struct team *team = netdev_priv(dev);
1891
1892 mutex_lock(&team->lock);
1893 __team_netpoll_cleanup(team);
1894 mutex_unlock(&team->lock);
1895 }
1896
1897 static int team_netpoll_setup(struct net_device *dev,
1898 struct netpoll_info *npifo)
1899 {
1900 struct team *team = netdev_priv(dev);
1901 struct team_port *port;
1902 int err = 0;
1903
1904 mutex_lock(&team->lock);
1905 list_for_each_entry(port, &team->port_list, list) {
1906 err = team_port_enable_netpoll(team, port);
1907 if (err) {
1908 __team_netpoll_cleanup(team);
1909 break;
1910 }
1911 }
1912 mutex_unlock(&team->lock);
1913 return err;
1914 }
1915 #endif
1916
1917 static int team_add_slave(struct net_device *dev, struct net_device *port_dev,
1918 struct netlink_ext_ack *extack)
1919 {
1920 struct team *team = netdev_priv(dev);
1921 int err;
1922
1923 mutex_lock(&team->lock);
1924 err = team_port_add(team, port_dev);
1925 mutex_unlock(&team->lock);
1926
1927 if (!err)
1928 netdev_change_features(dev);
1929
1930 return err;
1931 }
1932
1933 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1934 {
1935 struct team *team = netdev_priv(dev);
1936 int err;
1937
1938 mutex_lock(&team->lock);
1939 err = team_port_del(team, port_dev);
1940 mutex_unlock(&team->lock);
1941
1942 if (!err)
1943 netdev_change_features(dev);
1944
1945 return err;
1946 }
1947
1948 static netdev_features_t team_fix_features(struct net_device *dev,
1949 netdev_features_t features)
1950 {
1951 struct team_port *port;
1952 struct team *team = netdev_priv(dev);
1953 netdev_features_t mask;
1954
1955 mask = features;
1956 features &= ~NETIF_F_ONE_FOR_ALL;
1957 features |= NETIF_F_ALL_FOR_ALL;
1958
1959 rcu_read_lock();
1960 list_for_each_entry_rcu(port, &team->port_list, list) {
1961 features = netdev_increment_features(features,
1962 port->dev->features,
1963 mask);
1964 }
1965 rcu_read_unlock();
1966
1967 features = netdev_add_tso_features(features, mask);
1968
1969 return features;
1970 }
1971
1972 static int team_change_carrier(struct net_device *dev, bool new_carrier)
1973 {
1974 struct team *team = netdev_priv(dev);
1975
1976 team->user_carrier_enabled = true;
1977
1978 if (new_carrier)
1979 netif_carrier_on(dev);
1980 else
1981 netif_carrier_off(dev);
1982 return 0;
1983 }
1984
1985 static const struct net_device_ops team_netdev_ops = {
1986 .ndo_init = team_init,
1987 .ndo_uninit = team_uninit,
1988 .ndo_open = team_open,
1989 .ndo_stop = team_close,
1990 .ndo_start_xmit = team_xmit,
1991 .ndo_select_queue = team_select_queue,
1992 .ndo_change_rx_flags = team_change_rx_flags,
1993 .ndo_set_rx_mode = team_set_rx_mode,
1994 .ndo_set_mac_address = team_set_mac_address,
1995 .ndo_change_mtu = team_change_mtu,
1996 .ndo_get_stats64 = team_get_stats64,
1997 .ndo_vlan_rx_add_vid = team_vlan_rx_add_vid,
1998 .ndo_vlan_rx_kill_vid = team_vlan_rx_kill_vid,
1999 #ifdef CONFIG_NET_POLL_CONTROLLER
2000 .ndo_poll_controller = team_poll_controller,
2001 .ndo_netpoll_setup = team_netpoll_setup,
2002 .ndo_netpoll_cleanup = team_netpoll_cleanup,
2003 #endif
2004 .ndo_add_slave = team_add_slave,
2005 .ndo_del_slave = team_del_slave,
2006 .ndo_fix_features = team_fix_features,
2007 .ndo_change_carrier = team_change_carrier,
2008 .ndo_features_check = passthru_features_check,
2009 };
2010
2011 /***********************
2012 * ethtool interface
2013 ***********************/
2014
2015 static void team_ethtool_get_drvinfo(struct net_device *dev,
2016 struct ethtool_drvinfo *drvinfo)
2017 {
2018 strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
2019 strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2020 }
2021
2022 static const struct ethtool_ops team_ethtool_ops = {
2023 .get_drvinfo = team_ethtool_get_drvinfo,
2024 .get_link = ethtool_op_get_link,
2025 };
2026
2027 /***********************
2028 * rt netlink interface
2029 ***********************/
2030
2031 static void team_setup_by_port(struct net_device *dev,
2032 struct net_device *port_dev)
2033 {
2034 dev->header_ops = port_dev->header_ops;
2035 dev->type = port_dev->type;
2036 dev->hard_header_len = port_dev->hard_header_len;
2037 dev->addr_len = port_dev->addr_len;
2038 dev->mtu = port_dev->mtu;
2039 memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2040 eth_hw_addr_inherit(dev, port_dev);
2041 }
2042
2043 static int team_dev_type_check_change(struct net_device *dev,
2044 struct net_device *port_dev)
2045 {
2046 struct team *team = netdev_priv(dev);
2047 char *portname = port_dev->name;
2048 int err;
2049
2050 if (dev->type == port_dev->type)
2051 return 0;
2052 if (!list_empty(&team->port_list)) {
2053 netdev_err(dev, "Device %s is of different type\n", portname);
2054 return -EBUSY;
2055 }
2056 err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2057 err = notifier_to_errno(err);
2058 if (err) {
2059 netdev_err(dev, "Refused to change device type\n");
2060 return err;
2061 }
2062 dev_uc_flush(dev);
2063 dev_mc_flush(dev);
2064 team_setup_by_port(dev, port_dev);
2065 call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2066 return 0;
2067 }
2068
2069 static void team_setup(struct net_device *dev)
2070 {
2071 ether_setup(dev);
2072 dev->max_mtu = ETH_MAX_MTU;
2073
2074 dev->netdev_ops = &team_netdev_ops;
2075 dev->ethtool_ops = &team_ethtool_ops;
2076 dev->needs_free_netdev = true;
2077 dev->priv_destructor = team_destructor;
2078 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2079 dev->priv_flags |= IFF_NO_QUEUE;
2080 dev->priv_flags |= IFF_TEAM;
2081
2082 /*
2083 * Indicate we support unicast address filtering. That way core won't
2084 * bring us to promisc mode in case a unicast addr is added.
2085 * Let this up to underlay drivers.
2086 */
2087 dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2088
2089 dev->features |= NETIF_F_LLTX;
2090 dev->features |= NETIF_F_GRO;
2091
2092 /* Don't allow team devices to change network namespaces. */
2093 dev->features |= NETIF_F_NETNS_LOCAL;
2094
2095 dev->hw_features = TEAM_VLAN_FEATURES |
2096 NETIF_F_HW_VLAN_CTAG_TX |
2097 NETIF_F_HW_VLAN_CTAG_RX |
2098 NETIF_F_HW_VLAN_CTAG_FILTER;
2099
2100 dev->hw_features |= NETIF_F_GSO_ENCAP_ALL;
2101 dev->features |= dev->hw_features;
2102 }
2103
2104 static int team_newlink(struct net *src_net, struct net_device *dev,
2105 struct nlattr *tb[], struct nlattr *data[],
2106 struct netlink_ext_ack *extack)
2107 {
2108 if (tb[IFLA_ADDRESS] == NULL)
2109 eth_hw_addr_random(dev);
2110
2111 return register_netdevice(dev);
2112 }
2113
2114 static int team_validate(struct nlattr *tb[], struct nlattr *data[],
2115 struct netlink_ext_ack *extack)
2116 {
2117 if (tb[IFLA_ADDRESS]) {
2118 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2119 return -EINVAL;
2120 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2121 return -EADDRNOTAVAIL;
2122 }
2123 return 0;
2124 }
2125
2126 static unsigned int team_get_num_tx_queues(void)
2127 {
2128 return TEAM_DEFAULT_NUM_TX_QUEUES;
2129 }
2130
2131 static unsigned int team_get_num_rx_queues(void)
2132 {
2133 return TEAM_DEFAULT_NUM_RX_QUEUES;
2134 }
2135
2136 static struct rtnl_link_ops team_link_ops __read_mostly = {
2137 .kind = DRV_NAME,
2138 .priv_size = sizeof(struct team),
2139 .setup = team_setup,
2140 .newlink = team_newlink,
2141 .validate = team_validate,
2142 .get_num_tx_queues = team_get_num_tx_queues,
2143 .get_num_rx_queues = team_get_num_rx_queues,
2144 };
2145
2146
2147 /***********************************
2148 * Generic netlink custom interface
2149 ***********************************/
2150
2151 static struct genl_family team_nl_family;
2152
2153 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2154 [TEAM_ATTR_UNSPEC] = { .type = NLA_UNSPEC, },
2155 [TEAM_ATTR_TEAM_IFINDEX] = { .type = NLA_U32 },
2156 [TEAM_ATTR_LIST_OPTION] = { .type = NLA_NESTED },
2157 [TEAM_ATTR_LIST_PORT] = { .type = NLA_NESTED },
2158 };
2159
2160 static const struct nla_policy
2161 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2162 [TEAM_ATTR_OPTION_UNSPEC] = { .type = NLA_UNSPEC, },
2163 [TEAM_ATTR_OPTION_NAME] = {
2164 .type = NLA_STRING,
2165 .len = TEAM_STRING_MAX_LEN,
2166 },
2167 [TEAM_ATTR_OPTION_CHANGED] = { .type = NLA_FLAG },
2168 [TEAM_ATTR_OPTION_TYPE] = { .type = NLA_U8 },
2169 [TEAM_ATTR_OPTION_DATA] = { .type = NLA_BINARY },
2170 };
2171
2172 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2173 {
2174 struct sk_buff *msg;
2175 void *hdr;
2176 int err;
2177
2178 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2179 if (!msg)
2180 return -ENOMEM;
2181
2182 hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2183 &team_nl_family, 0, TEAM_CMD_NOOP);
2184 if (!hdr) {
2185 err = -EMSGSIZE;
2186 goto err_msg_put;
2187 }
2188
2189 genlmsg_end(msg, hdr);
2190
2191 return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2192
2193 err_msg_put:
2194 nlmsg_free(msg);
2195
2196 return err;
2197 }
2198
2199 /*
2200 * Netlink cmd functions should be locked by following two functions.
2201 * Since dev gets held here, that ensures dev won't disappear in between.
2202 */
2203 static struct team *team_nl_team_get(struct genl_info *info)
2204 {
2205 struct net *net = genl_info_net(info);
2206 int ifindex;
2207 struct net_device *dev;
2208 struct team *team;
2209
2210 if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2211 return NULL;
2212
2213 ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2214 dev = dev_get_by_index(net, ifindex);
2215 if (!dev || dev->netdev_ops != &team_netdev_ops) {
2216 if (dev)
2217 dev_put(dev);
2218 return NULL;
2219 }
2220
2221 team = netdev_priv(dev);
2222 mutex_lock(&team->lock);
2223 return team;
2224 }
2225
2226 static void team_nl_team_put(struct team *team)
2227 {
2228 mutex_unlock(&team->lock);
2229 dev_put(team->dev);
2230 }
2231
2232 typedef int team_nl_send_func_t(struct sk_buff *skb,
2233 struct team *team, u32 portid);
2234
2235 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2236 {
2237 return genlmsg_unicast(dev_net(team->dev), skb, portid);
2238 }
2239
2240 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2241 struct team_option_inst *opt_inst)
2242 {
2243 struct nlattr *option_item;
2244 struct team_option *option = opt_inst->option;
2245 struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2246 struct team_gsetter_ctx ctx;
2247 int err;
2248
2249 ctx.info = opt_inst_info;
2250 err = team_option_get(team, opt_inst, &ctx);
2251 if (err)
2252 return err;
2253
2254 option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
2255 if (!option_item)
2256 return -EMSGSIZE;
2257
2258 if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2259 goto nest_cancel;
2260 if (opt_inst_info->port &&
2261 nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2262 opt_inst_info->port->dev->ifindex))
2263 goto nest_cancel;
2264 if (opt_inst->option->array_size &&
2265 nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2266 opt_inst_info->array_index))
2267 goto nest_cancel;
2268
2269 switch (option->type) {
2270 case TEAM_OPTION_TYPE_U32:
2271 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2272 goto nest_cancel;
2273 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2274 goto nest_cancel;
2275 break;
2276 case TEAM_OPTION_TYPE_STRING:
2277 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2278 goto nest_cancel;
2279 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2280 ctx.data.str_val))
2281 goto nest_cancel;
2282 break;
2283 case TEAM_OPTION_TYPE_BINARY:
2284 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2285 goto nest_cancel;
2286 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2287 ctx.data.bin_val.ptr))
2288 goto nest_cancel;
2289 break;
2290 case TEAM_OPTION_TYPE_BOOL:
2291 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2292 goto nest_cancel;
2293 if (ctx.data.bool_val &&
2294 nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2295 goto nest_cancel;
2296 break;
2297 case TEAM_OPTION_TYPE_S32:
2298 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2299 goto nest_cancel;
2300 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2301 goto nest_cancel;
2302 break;
2303 default:
2304 BUG();
2305 }
2306 if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2307 goto nest_cancel;
2308 if (opt_inst->changed) {
2309 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2310 goto nest_cancel;
2311 opt_inst->changed = false;
2312 }
2313 nla_nest_end(skb, option_item);
2314 return 0;
2315
2316 nest_cancel:
2317 nla_nest_cancel(skb, option_item);
2318 return -EMSGSIZE;
2319 }
2320
2321 static int __send_and_alloc_skb(struct sk_buff **pskb,
2322 struct team *team, u32 portid,
2323 team_nl_send_func_t *send_func)
2324 {
2325 int err;
2326
2327 if (*pskb) {
2328 err = send_func(*pskb, team, portid);
2329 if (err)
2330 return err;
2331 }
2332 *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2333 if (!*pskb)
2334 return -ENOMEM;
2335 return 0;
2336 }
2337
2338 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2339 int flags, team_nl_send_func_t *send_func,
2340 struct list_head *sel_opt_inst_list)
2341 {
2342 struct nlattr *option_list;
2343 struct nlmsghdr *nlh;
2344 void *hdr;
2345 struct team_option_inst *opt_inst;
2346 int err;
2347 struct sk_buff *skb = NULL;
2348 bool incomplete;
2349 int i;
2350
2351 opt_inst = list_first_entry(sel_opt_inst_list,
2352 struct team_option_inst, tmp_list);
2353
2354 start_again:
2355 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2356 if (err)
2357 return err;
2358
2359 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2360 TEAM_CMD_OPTIONS_GET);
2361 if (!hdr) {
2362 nlmsg_free(skb);
2363 return -EMSGSIZE;
2364 }
2365
2366 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2367 goto nla_put_failure;
2368 option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2369 if (!option_list)
2370 goto nla_put_failure;
2371
2372 i = 0;
2373 incomplete = false;
2374 list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2375 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2376 if (err) {
2377 if (err == -EMSGSIZE) {
2378 if (!i)
2379 goto errout;
2380 incomplete = true;
2381 break;
2382 }
2383 goto errout;
2384 }
2385 i++;
2386 }
2387
2388 nla_nest_end(skb, option_list);
2389 genlmsg_end(skb, hdr);
2390 if (incomplete)
2391 goto start_again;
2392
2393 send_done:
2394 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2395 if (!nlh) {
2396 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2397 if (err)
2398 goto errout;
2399 goto send_done;
2400 }
2401
2402 return send_func(skb, team, portid);
2403
2404 nla_put_failure:
2405 err = -EMSGSIZE;
2406 errout:
2407 genlmsg_cancel(skb, hdr);
2408 nlmsg_free(skb);
2409 return err;
2410 }
2411
2412 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2413 {
2414 struct team *team;
2415 struct team_option_inst *opt_inst;
2416 int err;
2417 LIST_HEAD(sel_opt_inst_list);
2418
2419 team = team_nl_team_get(info);
2420 if (!team)
2421 return -EINVAL;
2422
2423 list_for_each_entry(opt_inst, &team->option_inst_list, list)
2424 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2425 err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2426 NLM_F_ACK, team_nl_send_unicast,
2427 &sel_opt_inst_list);
2428
2429 team_nl_team_put(team);
2430
2431 return err;
2432 }
2433
2434 static int team_nl_send_event_options_get(struct team *team,
2435 struct list_head *sel_opt_inst_list);
2436
2437 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2438 {
2439 struct team *team;
2440 int err = 0;
2441 int i;
2442 struct nlattr *nl_option;
2443 LIST_HEAD(opt_inst_list);
2444
2445 rtnl_lock();
2446
2447 team = team_nl_team_get(info);
2448 if (!team) {
2449 err = -EINVAL;
2450 goto rtnl_unlock;
2451 }
2452
2453 err = -EINVAL;
2454 if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2455 err = -EINVAL;
2456 goto team_put;
2457 }
2458
2459 nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2460 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2461 struct nlattr *attr;
2462 struct nlattr *attr_data;
2463 enum team_option_type opt_type;
2464 int opt_port_ifindex = 0; /* != 0 for per-port options */
2465 u32 opt_array_index = 0;
2466 bool opt_is_array = false;
2467 struct team_option_inst *opt_inst;
2468 char *opt_name;
2469 bool opt_found = false;
2470
2471 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2472 err = -EINVAL;
2473 goto team_put;
2474 }
2475 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2476 nl_option, team_nl_option_policy,
2477 info->extack);
2478 if (err)
2479 goto team_put;
2480 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2481 !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2482 err = -EINVAL;
2483 goto team_put;
2484 }
2485 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2486 case NLA_U32:
2487 opt_type = TEAM_OPTION_TYPE_U32;
2488 break;
2489 case NLA_STRING:
2490 opt_type = TEAM_OPTION_TYPE_STRING;
2491 break;
2492 case NLA_BINARY:
2493 opt_type = TEAM_OPTION_TYPE_BINARY;
2494 break;
2495 case NLA_FLAG:
2496 opt_type = TEAM_OPTION_TYPE_BOOL;
2497 break;
2498 case NLA_S32:
2499 opt_type = TEAM_OPTION_TYPE_S32;
2500 break;
2501 default:
2502 goto team_put;
2503 }
2504
2505 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2506 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2507 err = -EINVAL;
2508 goto team_put;
2509 }
2510
2511 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2512 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2513 if (attr)
2514 opt_port_ifindex = nla_get_u32(attr);
2515
2516 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2517 if (attr) {
2518 opt_is_array = true;
2519 opt_array_index = nla_get_u32(attr);
2520 }
2521
2522 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2523 struct team_option *option = opt_inst->option;
2524 struct team_gsetter_ctx ctx;
2525 struct team_option_inst_info *opt_inst_info;
2526 int tmp_ifindex;
2527
2528 opt_inst_info = &opt_inst->info;
2529 tmp_ifindex = opt_inst_info->port ?
2530 opt_inst_info->port->dev->ifindex : 0;
2531 if (option->type != opt_type ||
2532 strcmp(option->name, opt_name) ||
2533 tmp_ifindex != opt_port_ifindex ||
2534 (option->array_size && !opt_is_array) ||
2535 opt_inst_info->array_index != opt_array_index)
2536 continue;
2537 opt_found = true;
2538 ctx.info = opt_inst_info;
2539 switch (opt_type) {
2540 case TEAM_OPTION_TYPE_U32:
2541 ctx.data.u32_val = nla_get_u32(attr_data);
2542 break;
2543 case TEAM_OPTION_TYPE_STRING:
2544 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2545 err = -EINVAL;
2546 goto team_put;
2547 }
2548 ctx.data.str_val = nla_data(attr_data);
2549 break;
2550 case TEAM_OPTION_TYPE_BINARY:
2551 ctx.data.bin_val.len = nla_len(attr_data);
2552 ctx.data.bin_val.ptr = nla_data(attr_data);
2553 break;
2554 case TEAM_OPTION_TYPE_BOOL:
2555 ctx.data.bool_val = attr_data ? true : false;
2556 break;
2557 case TEAM_OPTION_TYPE_S32:
2558 ctx.data.s32_val = nla_get_s32(attr_data);
2559 break;
2560 default:
2561 BUG();
2562 }
2563 err = team_option_set(team, opt_inst, &ctx);
2564 if (err)
2565 goto team_put;
2566 opt_inst->changed = true;
2567 list_add(&opt_inst->tmp_list, &opt_inst_list);
2568 }
2569 if (!opt_found) {
2570 err = -ENOENT;
2571 goto team_put;
2572 }
2573 }
2574
2575 err = team_nl_send_event_options_get(team, &opt_inst_list);
2576
2577 team_put:
2578 team_nl_team_put(team);
2579 rtnl_unlock:
2580 rtnl_unlock();
2581 return err;
2582 }
2583
2584 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2585 struct team_port *port)
2586 {
2587 struct nlattr *port_item;
2588
2589 port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2590 if (!port_item)
2591 goto nest_cancel;
2592 if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2593 goto nest_cancel;
2594 if (port->changed) {
2595 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2596 goto nest_cancel;
2597 port->changed = false;
2598 }
2599 if ((port->removed &&
2600 nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2601 (port->state.linkup &&
2602 nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2603 nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2604 nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2605 goto nest_cancel;
2606 nla_nest_end(skb, port_item);
2607 return 0;
2608
2609 nest_cancel:
2610 nla_nest_cancel(skb, port_item);
2611 return -EMSGSIZE;
2612 }
2613
2614 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2615 int flags, team_nl_send_func_t *send_func,
2616 struct team_port *one_port)
2617 {
2618 struct nlattr *port_list;
2619 struct nlmsghdr *nlh;
2620 void *hdr;
2621 struct team_port *port;
2622 int err;
2623 struct sk_buff *skb = NULL;
2624 bool incomplete;
2625 int i;
2626
2627 port = list_first_entry_or_null(&team->port_list,
2628 struct team_port, list);
2629
2630 start_again:
2631 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2632 if (err)
2633 return err;
2634
2635 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2636 TEAM_CMD_PORT_LIST_GET);
2637 if (!hdr) {
2638 nlmsg_free(skb);
2639 return -EMSGSIZE;
2640 }
2641
2642 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2643 goto nla_put_failure;
2644 port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2645 if (!port_list)
2646 goto nla_put_failure;
2647
2648 i = 0;
2649 incomplete = false;
2650
2651 /* If one port is selected, called wants to send port list containing
2652 * only this port. Otherwise go through all listed ports and send all
2653 */
2654 if (one_port) {
2655 err = team_nl_fill_one_port_get(skb, one_port);
2656 if (err)
2657 goto errout;
2658 } else if (port) {
2659 list_for_each_entry_from(port, &team->port_list, list) {
2660 err = team_nl_fill_one_port_get(skb, port);
2661 if (err) {
2662 if (err == -EMSGSIZE) {
2663 if (!i)
2664 goto errout;
2665 incomplete = true;
2666 break;
2667 }
2668 goto errout;
2669 }
2670 i++;
2671 }
2672 }
2673
2674 nla_nest_end(skb, port_list);
2675 genlmsg_end(skb, hdr);
2676 if (incomplete)
2677 goto start_again;
2678
2679 send_done:
2680 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2681 if (!nlh) {
2682 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2683 if (err)
2684 goto errout;
2685 goto send_done;
2686 }
2687
2688 return send_func(skb, team, portid);
2689
2690 nla_put_failure:
2691 err = -EMSGSIZE;
2692 errout:
2693 genlmsg_cancel(skb, hdr);
2694 nlmsg_free(skb);
2695 return err;
2696 }
2697
2698 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2699 struct genl_info *info)
2700 {
2701 struct team *team;
2702 int err;
2703
2704 team = team_nl_team_get(info);
2705 if (!team)
2706 return -EINVAL;
2707
2708 err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2709 NLM_F_ACK, team_nl_send_unicast, NULL);
2710
2711 team_nl_team_put(team);
2712
2713 return err;
2714 }
2715
2716 static const struct genl_ops team_nl_ops[] = {
2717 {
2718 .cmd = TEAM_CMD_NOOP,
2719 .doit = team_nl_cmd_noop,
2720 .policy = team_nl_policy,
2721 },
2722 {
2723 .cmd = TEAM_CMD_OPTIONS_SET,
2724 .doit = team_nl_cmd_options_set,
2725 .policy = team_nl_policy,
2726 .flags = GENL_ADMIN_PERM,
2727 },
2728 {
2729 .cmd = TEAM_CMD_OPTIONS_GET,
2730 .doit = team_nl_cmd_options_get,
2731 .policy = team_nl_policy,
2732 .flags = GENL_ADMIN_PERM,
2733 },
2734 {
2735 .cmd = TEAM_CMD_PORT_LIST_GET,
2736 .doit = team_nl_cmd_port_list_get,
2737 .policy = team_nl_policy,
2738 .flags = GENL_ADMIN_PERM,
2739 },
2740 };
2741
2742 static const struct genl_multicast_group team_nl_mcgrps[] = {
2743 { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2744 };
2745
2746 static struct genl_family team_nl_family __ro_after_init = {
2747 .name = TEAM_GENL_NAME,
2748 .version = TEAM_GENL_VERSION,
2749 .maxattr = TEAM_ATTR_MAX,
2750 .netnsok = true,
2751 .module = THIS_MODULE,
2752 .ops = team_nl_ops,
2753 .n_ops = ARRAY_SIZE(team_nl_ops),
2754 .mcgrps = team_nl_mcgrps,
2755 .n_mcgrps = ARRAY_SIZE(team_nl_mcgrps),
2756 };
2757
2758 static int team_nl_send_multicast(struct sk_buff *skb,
2759 struct team *team, u32 portid)
2760 {
2761 return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2762 skb, 0, 0, GFP_KERNEL);
2763 }
2764
2765 static int team_nl_send_event_options_get(struct team *team,
2766 struct list_head *sel_opt_inst_list)
2767 {
2768 return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2769 sel_opt_inst_list);
2770 }
2771
2772 static int team_nl_send_event_port_get(struct team *team,
2773 struct team_port *port)
2774 {
2775 return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2776 port);
2777 }
2778
2779 static int __init team_nl_init(void)
2780 {
2781 return genl_register_family(&team_nl_family);
2782 }
2783
2784 static void team_nl_fini(void)
2785 {
2786 genl_unregister_family(&team_nl_family);
2787 }
2788
2789
2790 /******************
2791 * Change checkers
2792 ******************/
2793
2794 static void __team_options_change_check(struct team *team)
2795 {
2796 int err;
2797 struct team_option_inst *opt_inst;
2798 LIST_HEAD(sel_opt_inst_list);
2799
2800 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2801 if (opt_inst->changed)
2802 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2803 }
2804 err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2805 if (err && err != -ESRCH)
2806 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2807 err);
2808 }
2809
2810 /* rtnl lock is held */
2811
2812 static void __team_port_change_send(struct team_port *port, bool linkup)
2813 {
2814 int err;
2815
2816 port->changed = true;
2817 port->state.linkup = linkup;
2818 team_refresh_port_linkup(port);
2819 if (linkup) {
2820 struct ethtool_link_ksettings ecmd;
2821
2822 err = __ethtool_get_link_ksettings(port->dev, &ecmd);
2823 if (!err) {
2824 port->state.speed = ecmd.base.speed;
2825 port->state.duplex = ecmd.base.duplex;
2826 goto send_event;
2827 }
2828 }
2829 port->state.speed = 0;
2830 port->state.duplex = 0;
2831
2832 send_event:
2833 err = team_nl_send_event_port_get(port->team, port);
2834 if (err && err != -ESRCH)
2835 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2836 port->dev->name, err);
2837
2838 }
2839
2840 static void __team_carrier_check(struct team *team)
2841 {
2842 struct team_port *port;
2843 bool team_linkup;
2844
2845 if (team->user_carrier_enabled)
2846 return;
2847
2848 team_linkup = false;
2849 list_for_each_entry(port, &team->port_list, list) {
2850 if (port->linkup) {
2851 team_linkup = true;
2852 break;
2853 }
2854 }
2855
2856 if (team_linkup)
2857 netif_carrier_on(team->dev);
2858 else
2859 netif_carrier_off(team->dev);
2860 }
2861
2862 static void __team_port_change_check(struct team_port *port, bool linkup)
2863 {
2864 if (port->state.linkup != linkup)
2865 __team_port_change_send(port, linkup);
2866 __team_carrier_check(port->team);
2867 }
2868
2869 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2870 {
2871 __team_port_change_send(port, linkup);
2872 __team_carrier_check(port->team);
2873 }
2874
2875 static void __team_port_change_port_removed(struct team_port *port)
2876 {
2877 port->removed = true;
2878 __team_port_change_send(port, false);
2879 __team_carrier_check(port->team);
2880 }
2881
2882 static void team_port_change_check(struct team_port *port, bool linkup)
2883 {
2884 struct team *team = port->team;
2885
2886 mutex_lock(&team->lock);
2887 __team_port_change_check(port, linkup);
2888 mutex_unlock(&team->lock);
2889 }
2890
2891
2892 /************************************
2893 * Net device notifier event handler
2894 ************************************/
2895
2896 static int team_device_event(struct notifier_block *unused,
2897 unsigned long event, void *ptr)
2898 {
2899 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2900 struct team_port *port;
2901
2902 port = team_port_get_rtnl(dev);
2903 if (!port)
2904 return NOTIFY_DONE;
2905
2906 switch (event) {
2907 case NETDEV_UP:
2908 if (netif_carrier_ok(dev))
2909 team_port_change_check(port, true);
2910 break;
2911 case NETDEV_DOWN:
2912 team_port_change_check(port, false);
2913 break;
2914 case NETDEV_CHANGE:
2915 if (netif_running(port->dev))
2916 team_port_change_check(port,
2917 !!netif_carrier_ok(port->dev));
2918 break;
2919 case NETDEV_UNREGISTER:
2920 team_del_slave(port->team->dev, dev);
2921 break;
2922 case NETDEV_FEAT_CHANGE:
2923 team_compute_features(port->team);
2924 break;
2925 case NETDEV_PRECHANGEMTU:
2926 /* Forbid to change mtu of underlaying device */
2927 if (!port->team->port_mtu_change_allowed)
2928 return NOTIFY_BAD;
2929 break;
2930 case NETDEV_PRE_TYPE_CHANGE:
2931 /* Forbid to change type of underlaying device */
2932 return NOTIFY_BAD;
2933 case NETDEV_RESEND_IGMP:
2934 /* Propagate to master device */
2935 call_netdevice_notifiers(event, port->team->dev);
2936 break;
2937 }
2938 return NOTIFY_DONE;
2939 }
2940
2941 static struct notifier_block team_notifier_block __read_mostly = {
2942 .notifier_call = team_device_event,
2943 };
2944
2945
2946 /***********************
2947 * Module init and exit
2948 ***********************/
2949
2950 static int __init team_module_init(void)
2951 {
2952 int err;
2953
2954 register_netdevice_notifier(&team_notifier_block);
2955
2956 err = rtnl_link_register(&team_link_ops);
2957 if (err)
2958 goto err_rtnl_reg;
2959
2960 err = team_nl_init();
2961 if (err)
2962 goto err_nl_init;
2963
2964 return 0;
2965
2966 err_nl_init:
2967 rtnl_link_unregister(&team_link_ops);
2968
2969 err_rtnl_reg:
2970 unregister_netdevice_notifier(&team_notifier_block);
2971
2972 return err;
2973 }
2974
2975 static void __exit team_module_exit(void)
2976 {
2977 team_nl_fini();
2978 rtnl_link_unregister(&team_link_ops);
2979 unregister_netdevice_notifier(&team_notifier_block);
2980 }
2981
2982 module_init(team_module_init);
2983 module_exit(team_module_exit);
2984
2985 MODULE_LICENSE("GPL v2");
2986 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
2987 MODULE_DESCRIPTION("Ethernet team device driver");
2988 MODULE_ALIAS_RTNL_LINK(DRV_NAME);
Linux with added FPC-III support