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ata: add AMD Seattle platform driver
[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 netdev_change_features(team->dev);
1026 }
1027
1028 static void team_compute_features(struct team *team)
1029 {
1030 mutex_lock(&team->lock);
1031 __team_compute_features(team);
1032 mutex_unlock(&team->lock);
1033 }
1034
1035 static int team_port_enter(struct team *team, struct team_port *port)
1036 {
1037 int err = 0;
1038
1039 dev_hold(team->dev);
1040 if (team->ops.port_enter) {
1041 err = team->ops.port_enter(team, port);
1042 if (err) {
1043 netdev_err(team->dev, "Device %s failed to enter team mode\n",
1044 port->dev->name);
1045 goto err_port_enter;
1046 }
1047 }
1048
1049 return 0;
1050
1051 err_port_enter:
1052 dev_put(team->dev);
1053
1054 return err;
1055 }
1056
1057 static void team_port_leave(struct team *team, struct team_port *port)
1058 {
1059 if (team->ops.port_leave)
1060 team->ops.port_leave(team, port);
1061 dev_put(team->dev);
1062 }
1063
1064 #ifdef CONFIG_NET_POLL_CONTROLLER
1065 static int team_port_enable_netpoll(struct team *team, struct team_port *port)
1066 {
1067 struct netpoll *np;
1068 int err;
1069
1070 if (!team->dev->npinfo)
1071 return 0;
1072
1073 np = kzalloc(sizeof(*np), GFP_KERNEL);
1074 if (!np)
1075 return -ENOMEM;
1076
1077 err = __netpoll_setup(np, port->dev);
1078 if (err) {
1079 kfree(np);
1080 return err;
1081 }
1082 port->np = np;
1083 return err;
1084 }
1085
1086 static void team_port_disable_netpoll(struct team_port *port)
1087 {
1088 struct netpoll *np = port->np;
1089
1090 if (!np)
1091 return;
1092 port->np = NULL;
1093
1094 /* Wait for transmitting packets to finish before freeing. */
1095 synchronize_rcu_bh();
1096 __netpoll_cleanup(np);
1097 kfree(np);
1098 }
1099 #else
1100 static int team_port_enable_netpoll(struct team *team, struct team_port *port)
1101 {
1102 return 0;
1103 }
1104 static void team_port_disable_netpoll(struct team_port *port)
1105 {
1106 }
1107 #endif
1108
1109 static int team_upper_dev_link(struct team *team, struct team_port *port)
1110 {
1111 struct netdev_lag_upper_info lag_upper_info;
1112 int err;
1113
1114 lag_upper_info.tx_type = team->mode->lag_tx_type;
1115 err = netdev_master_upper_dev_link(port->dev, team->dev, NULL,
1116 &lag_upper_info);
1117 if (err)
1118 return err;
1119 port->dev->priv_flags |= IFF_TEAM_PORT;
1120 return 0;
1121 }
1122
1123 static void team_upper_dev_unlink(struct team *team, struct team_port *port)
1124 {
1125 netdev_upper_dev_unlink(port->dev, team->dev);
1126 port->dev->priv_flags &= ~IFF_TEAM_PORT;
1127 }
1128
1129 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1130 static int team_dev_type_check_change(struct net_device *dev,
1131 struct net_device *port_dev);
1132
1133 static int team_port_add(struct team *team, struct net_device *port_dev)
1134 {
1135 struct net_device *dev = team->dev;
1136 struct team_port *port;
1137 char *portname = port_dev->name;
1138 int err;
1139
1140 if (port_dev->flags & IFF_LOOPBACK) {
1141 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1142 portname);
1143 return -EINVAL;
1144 }
1145
1146 if (team_port_exists(port_dev)) {
1147 netdev_err(dev, "Device %s is already a port "
1148 "of a team device\n", portname);
1149 return -EBUSY;
1150 }
1151
1152 if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1153 vlan_uses_dev(dev)) {
1154 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1155 portname);
1156 return -EPERM;
1157 }
1158
1159 err = team_dev_type_check_change(dev, port_dev);
1160 if (err)
1161 return err;
1162
1163 if (port_dev->flags & IFF_UP) {
1164 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1165 portname);
1166 return -EBUSY;
1167 }
1168
1169 port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1170 GFP_KERNEL);
1171 if (!port)
1172 return -ENOMEM;
1173
1174 port->dev = port_dev;
1175 port->team = team;
1176 INIT_LIST_HEAD(&port->qom_list);
1177
1178 port->orig.mtu = port_dev->mtu;
1179 err = dev_set_mtu(port_dev, dev->mtu);
1180 if (err) {
1181 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1182 goto err_set_mtu;
1183 }
1184
1185 memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1186
1187 err = team_port_enter(team, port);
1188 if (err) {
1189 netdev_err(dev, "Device %s failed to enter team mode\n",
1190 portname);
1191 goto err_port_enter;
1192 }
1193
1194 err = dev_open(port_dev);
1195 if (err) {
1196 netdev_dbg(dev, "Device %s opening failed\n",
1197 portname);
1198 goto err_dev_open;
1199 }
1200
1201 err = vlan_vids_add_by_dev(port_dev, dev);
1202 if (err) {
1203 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1204 portname);
1205 goto err_vids_add;
1206 }
1207
1208 err = team_port_enable_netpoll(team, port);
1209 if (err) {
1210 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1211 portname);
1212 goto err_enable_netpoll;
1213 }
1214
1215 if (!(dev->features & NETIF_F_LRO))
1216 dev_disable_lro(port_dev);
1217
1218 err = netdev_rx_handler_register(port_dev, team_handle_frame,
1219 port);
1220 if (err) {
1221 netdev_err(dev, "Device %s failed to register rx_handler\n",
1222 portname);
1223 goto err_handler_register;
1224 }
1225
1226 err = team_upper_dev_link(team, port);
1227 if (err) {
1228 netdev_err(dev, "Device %s failed to set upper link\n",
1229 portname);
1230 goto err_set_upper_link;
1231 }
1232
1233 err = __team_option_inst_add_port(team, port);
1234 if (err) {
1235 netdev_err(dev, "Device %s failed to add per-port options\n",
1236 portname);
1237 goto err_option_port_add;
1238 }
1239
1240 port->index = -1;
1241 list_add_tail_rcu(&port->list, &team->port_list);
1242 team_port_enable(team, port);
1243 __team_compute_features(team);
1244 __team_port_change_port_added(port, !!netif_carrier_ok(port_dev));
1245 __team_options_change_check(team);
1246
1247 netdev_info(dev, "Port device %s added\n", portname);
1248
1249 return 0;
1250
1251 err_option_port_add:
1252 team_upper_dev_unlink(team, port);
1253
1254 err_set_upper_link:
1255 netdev_rx_handler_unregister(port_dev);
1256
1257 err_handler_register:
1258 team_port_disable_netpoll(port);
1259
1260 err_enable_netpoll:
1261 vlan_vids_del_by_dev(port_dev, dev);
1262
1263 err_vids_add:
1264 dev_close(port_dev);
1265
1266 err_dev_open:
1267 team_port_leave(team, port);
1268 team_port_set_orig_dev_addr(port);
1269
1270 err_port_enter:
1271 dev_set_mtu(port_dev, port->orig.mtu);
1272
1273 err_set_mtu:
1274 kfree(port);
1275
1276 return err;
1277 }
1278
1279 static void __team_port_change_port_removed(struct team_port *port);
1280
1281 static int team_port_del(struct team *team, struct net_device *port_dev)
1282 {
1283 struct net_device *dev = team->dev;
1284 struct team_port *port;
1285 char *portname = port_dev->name;
1286
1287 port = team_port_get_rtnl(port_dev);
1288 if (!port || !team_port_find(team, port)) {
1289 netdev_err(dev, "Device %s does not act as a port of this team\n",
1290 portname);
1291 return -ENOENT;
1292 }
1293
1294 team_port_disable(team, port);
1295 list_del_rcu(&port->list);
1296 team_upper_dev_unlink(team, port);
1297 netdev_rx_handler_unregister(port_dev);
1298 team_port_disable_netpoll(port);
1299 vlan_vids_del_by_dev(port_dev, dev);
1300 dev_uc_unsync(port_dev, dev);
1301 dev_mc_unsync(port_dev, dev);
1302 dev_close(port_dev);
1303 team_port_leave(team, port);
1304
1305 __team_option_inst_mark_removed_port(team, port);
1306 __team_options_change_check(team);
1307 __team_option_inst_del_port(team, port);
1308 __team_port_change_port_removed(port);
1309
1310 team_port_set_orig_dev_addr(port);
1311 dev_set_mtu(port_dev, port->orig.mtu);
1312 kfree_rcu(port, rcu);
1313 netdev_info(dev, "Port device %s removed\n", portname);
1314 __team_compute_features(team);
1315
1316 return 0;
1317 }
1318
1319
1320 /*****************
1321 * Net device ops
1322 *****************/
1323
1324 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1325 {
1326 ctx->data.str_val = team->mode->kind;
1327 return 0;
1328 }
1329
1330 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1331 {
1332 return team_change_mode(team, ctx->data.str_val);
1333 }
1334
1335 static int team_notify_peers_count_get(struct team *team,
1336 struct team_gsetter_ctx *ctx)
1337 {
1338 ctx->data.u32_val = team->notify_peers.count;
1339 return 0;
1340 }
1341
1342 static int team_notify_peers_count_set(struct team *team,
1343 struct team_gsetter_ctx *ctx)
1344 {
1345 team->notify_peers.count = ctx->data.u32_val;
1346 return 0;
1347 }
1348
1349 static int team_notify_peers_interval_get(struct team *team,
1350 struct team_gsetter_ctx *ctx)
1351 {
1352 ctx->data.u32_val = team->notify_peers.interval;
1353 return 0;
1354 }
1355
1356 static int team_notify_peers_interval_set(struct team *team,
1357 struct team_gsetter_ctx *ctx)
1358 {
1359 team->notify_peers.interval = ctx->data.u32_val;
1360 return 0;
1361 }
1362
1363 static int team_mcast_rejoin_count_get(struct team *team,
1364 struct team_gsetter_ctx *ctx)
1365 {
1366 ctx->data.u32_val = team->mcast_rejoin.count;
1367 return 0;
1368 }
1369
1370 static int team_mcast_rejoin_count_set(struct team *team,
1371 struct team_gsetter_ctx *ctx)
1372 {
1373 team->mcast_rejoin.count = ctx->data.u32_val;
1374 return 0;
1375 }
1376
1377 static int team_mcast_rejoin_interval_get(struct team *team,
1378 struct team_gsetter_ctx *ctx)
1379 {
1380 ctx->data.u32_val = team->mcast_rejoin.interval;
1381 return 0;
1382 }
1383
1384 static int team_mcast_rejoin_interval_set(struct team *team,
1385 struct team_gsetter_ctx *ctx)
1386 {
1387 team->mcast_rejoin.interval = ctx->data.u32_val;
1388 return 0;
1389 }
1390
1391 static int team_port_en_option_get(struct team *team,
1392 struct team_gsetter_ctx *ctx)
1393 {
1394 struct team_port *port = ctx->info->port;
1395
1396 ctx->data.bool_val = team_port_enabled(port);
1397 return 0;
1398 }
1399
1400 static int team_port_en_option_set(struct team *team,
1401 struct team_gsetter_ctx *ctx)
1402 {
1403 struct team_port *port = ctx->info->port;
1404
1405 if (ctx->data.bool_val)
1406 team_port_enable(team, port);
1407 else
1408 team_port_disable(team, port);
1409 return 0;
1410 }
1411
1412 static int team_user_linkup_option_get(struct team *team,
1413 struct team_gsetter_ctx *ctx)
1414 {
1415 struct team_port *port = ctx->info->port;
1416
1417 ctx->data.bool_val = port->user.linkup;
1418 return 0;
1419 }
1420
1421 static void __team_carrier_check(struct team *team);
1422
1423 static int team_user_linkup_option_set(struct team *team,
1424 struct team_gsetter_ctx *ctx)
1425 {
1426 struct team_port *port = ctx->info->port;
1427
1428 port->user.linkup = ctx->data.bool_val;
1429 team_refresh_port_linkup(port);
1430 __team_carrier_check(port->team);
1431 return 0;
1432 }
1433
1434 static int team_user_linkup_en_option_get(struct team *team,
1435 struct team_gsetter_ctx *ctx)
1436 {
1437 struct team_port *port = ctx->info->port;
1438
1439 ctx->data.bool_val = port->user.linkup_enabled;
1440 return 0;
1441 }
1442
1443 static int team_user_linkup_en_option_set(struct team *team,
1444 struct team_gsetter_ctx *ctx)
1445 {
1446 struct team_port *port = ctx->info->port;
1447
1448 port->user.linkup_enabled = ctx->data.bool_val;
1449 team_refresh_port_linkup(port);
1450 __team_carrier_check(port->team);
1451 return 0;
1452 }
1453
1454 static int team_priority_option_get(struct team *team,
1455 struct team_gsetter_ctx *ctx)
1456 {
1457 struct team_port *port = ctx->info->port;
1458
1459 ctx->data.s32_val = port->priority;
1460 return 0;
1461 }
1462
1463 static int team_priority_option_set(struct team *team,
1464 struct team_gsetter_ctx *ctx)
1465 {
1466 struct team_port *port = ctx->info->port;
1467 s32 priority = ctx->data.s32_val;
1468
1469 if (port->priority == priority)
1470 return 0;
1471 port->priority = priority;
1472 team_queue_override_port_prio_changed(team, port);
1473 return 0;
1474 }
1475
1476 static int team_queue_id_option_get(struct team *team,
1477 struct team_gsetter_ctx *ctx)
1478 {
1479 struct team_port *port = ctx->info->port;
1480
1481 ctx->data.u32_val = port->queue_id;
1482 return 0;
1483 }
1484
1485 static int team_queue_id_option_set(struct team *team,
1486 struct team_gsetter_ctx *ctx)
1487 {
1488 struct team_port *port = ctx->info->port;
1489 u16 new_queue_id = ctx->data.u32_val;
1490
1491 if (port->queue_id == new_queue_id)
1492 return 0;
1493 if (new_queue_id >= team->dev->real_num_tx_queues)
1494 return -EINVAL;
1495 team_queue_override_port_change_queue_id(team, port, new_queue_id);
1496 return 0;
1497 }
1498
1499 static const struct team_option team_options[] = {
1500 {
1501 .name = "mode",
1502 .type = TEAM_OPTION_TYPE_STRING,
1503 .getter = team_mode_option_get,
1504 .setter = team_mode_option_set,
1505 },
1506 {
1507 .name = "notify_peers_count",
1508 .type = TEAM_OPTION_TYPE_U32,
1509 .getter = team_notify_peers_count_get,
1510 .setter = team_notify_peers_count_set,
1511 },
1512 {
1513 .name = "notify_peers_interval",
1514 .type = TEAM_OPTION_TYPE_U32,
1515 .getter = team_notify_peers_interval_get,
1516 .setter = team_notify_peers_interval_set,
1517 },
1518 {
1519 .name = "mcast_rejoin_count",
1520 .type = TEAM_OPTION_TYPE_U32,
1521 .getter = team_mcast_rejoin_count_get,
1522 .setter = team_mcast_rejoin_count_set,
1523 },
1524 {
1525 .name = "mcast_rejoin_interval",
1526 .type = TEAM_OPTION_TYPE_U32,
1527 .getter = team_mcast_rejoin_interval_get,
1528 .setter = team_mcast_rejoin_interval_set,
1529 },
1530 {
1531 .name = "enabled",
1532 .type = TEAM_OPTION_TYPE_BOOL,
1533 .per_port = true,
1534 .getter = team_port_en_option_get,
1535 .setter = team_port_en_option_set,
1536 },
1537 {
1538 .name = "user_linkup",
1539 .type = TEAM_OPTION_TYPE_BOOL,
1540 .per_port = true,
1541 .getter = team_user_linkup_option_get,
1542 .setter = team_user_linkup_option_set,
1543 },
1544 {
1545 .name = "user_linkup_enabled",
1546 .type = TEAM_OPTION_TYPE_BOOL,
1547 .per_port = true,
1548 .getter = team_user_linkup_en_option_get,
1549 .setter = team_user_linkup_en_option_set,
1550 },
1551 {
1552 .name = "priority",
1553 .type = TEAM_OPTION_TYPE_S32,
1554 .per_port = true,
1555 .getter = team_priority_option_get,
1556 .setter = team_priority_option_set,
1557 },
1558 {
1559 .name = "queue_id",
1560 .type = TEAM_OPTION_TYPE_U32,
1561 .per_port = true,
1562 .getter = team_queue_id_option_get,
1563 .setter = team_queue_id_option_set,
1564 },
1565 };
1566
1567 static struct lock_class_key team_netdev_xmit_lock_key;
1568 static struct lock_class_key team_netdev_addr_lock_key;
1569 static struct lock_class_key team_tx_busylock_key;
1570
1571 static void team_set_lockdep_class_one(struct net_device *dev,
1572 struct netdev_queue *txq,
1573 void *unused)
1574 {
1575 lockdep_set_class(&txq->_xmit_lock, &team_netdev_xmit_lock_key);
1576 }
1577
1578 static void team_set_lockdep_class(struct net_device *dev)
1579 {
1580 lockdep_set_class(&dev->addr_list_lock, &team_netdev_addr_lock_key);
1581 netdev_for_each_tx_queue(dev, team_set_lockdep_class_one, NULL);
1582 dev->qdisc_tx_busylock = &team_tx_busylock_key;
1583 }
1584
1585 static int team_init(struct net_device *dev)
1586 {
1587 struct team *team = netdev_priv(dev);
1588 int i;
1589 int err;
1590
1591 team->dev = dev;
1592 mutex_init(&team->lock);
1593 team_set_no_mode(team);
1594
1595 team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1596 if (!team->pcpu_stats)
1597 return -ENOMEM;
1598
1599 for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1600 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1601 INIT_LIST_HEAD(&team->port_list);
1602 err = team_queue_override_init(team);
1603 if (err)
1604 goto err_team_queue_override_init;
1605
1606 team_adjust_ops(team);
1607
1608 INIT_LIST_HEAD(&team->option_list);
1609 INIT_LIST_HEAD(&team->option_inst_list);
1610
1611 team_notify_peers_init(team);
1612 team_mcast_rejoin_init(team);
1613
1614 err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1615 if (err)
1616 goto err_options_register;
1617 netif_carrier_off(dev);
1618
1619 team_set_lockdep_class(dev);
1620
1621 return 0;
1622
1623 err_options_register:
1624 team_mcast_rejoin_fini(team);
1625 team_notify_peers_fini(team);
1626 team_queue_override_fini(team);
1627 err_team_queue_override_init:
1628 free_percpu(team->pcpu_stats);
1629
1630 return err;
1631 }
1632
1633 static void team_uninit(struct net_device *dev)
1634 {
1635 struct team *team = netdev_priv(dev);
1636 struct team_port *port;
1637 struct team_port *tmp;
1638
1639 mutex_lock(&team->lock);
1640 list_for_each_entry_safe(port, tmp, &team->port_list, list)
1641 team_port_del(team, port->dev);
1642
1643 __team_change_mode(team, NULL); /* cleanup */
1644 __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1645 team_mcast_rejoin_fini(team);
1646 team_notify_peers_fini(team);
1647 team_queue_override_fini(team);
1648 mutex_unlock(&team->lock);
1649 }
1650
1651 static void team_destructor(struct net_device *dev)
1652 {
1653 struct team *team = netdev_priv(dev);
1654
1655 free_percpu(team->pcpu_stats);
1656 free_netdev(dev);
1657 }
1658
1659 static int team_open(struct net_device *dev)
1660 {
1661 return 0;
1662 }
1663
1664 static int team_close(struct net_device *dev)
1665 {
1666 return 0;
1667 }
1668
1669 /*
1670 * note: already called with rcu_read_lock
1671 */
1672 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1673 {
1674 struct team *team = netdev_priv(dev);
1675 bool tx_success;
1676 unsigned int len = skb->len;
1677
1678 tx_success = team_queue_override_transmit(team, skb);
1679 if (!tx_success)
1680 tx_success = team->ops.transmit(team, skb);
1681 if (tx_success) {
1682 struct team_pcpu_stats *pcpu_stats;
1683
1684 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1685 u64_stats_update_begin(&pcpu_stats->syncp);
1686 pcpu_stats->tx_packets++;
1687 pcpu_stats->tx_bytes += len;
1688 u64_stats_update_end(&pcpu_stats->syncp);
1689 } else {
1690 this_cpu_inc(team->pcpu_stats->tx_dropped);
1691 }
1692
1693 return NETDEV_TX_OK;
1694 }
1695
1696 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1697 void *accel_priv, select_queue_fallback_t fallback)
1698 {
1699 /*
1700 * This helper function exists to help dev_pick_tx get the correct
1701 * destination queue. Using a helper function skips a call to
1702 * skb_tx_hash and will put the skbs in the queue we expect on their
1703 * way down to the team driver.
1704 */
1705 u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1706
1707 /*
1708 * Save the original txq to restore before passing to the driver
1709 */
1710 qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1711
1712 if (unlikely(txq >= dev->real_num_tx_queues)) {
1713 do {
1714 txq -= dev->real_num_tx_queues;
1715 } while (txq >= dev->real_num_tx_queues);
1716 }
1717 return txq;
1718 }
1719
1720 static void team_change_rx_flags(struct net_device *dev, int change)
1721 {
1722 struct team *team = netdev_priv(dev);
1723 struct team_port *port;
1724 int inc;
1725
1726 rcu_read_lock();
1727 list_for_each_entry_rcu(port, &team->port_list, list) {
1728 if (change & IFF_PROMISC) {
1729 inc = dev->flags & IFF_PROMISC ? 1 : -1;
1730 dev_set_promiscuity(port->dev, inc);
1731 }
1732 if (change & IFF_ALLMULTI) {
1733 inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1734 dev_set_allmulti(port->dev, inc);
1735 }
1736 }
1737 rcu_read_unlock();
1738 }
1739
1740 static void team_set_rx_mode(struct net_device *dev)
1741 {
1742 struct team *team = netdev_priv(dev);
1743 struct team_port *port;
1744
1745 rcu_read_lock();
1746 list_for_each_entry_rcu(port, &team->port_list, list) {
1747 dev_uc_sync_multiple(port->dev, dev);
1748 dev_mc_sync_multiple(port->dev, dev);
1749 }
1750 rcu_read_unlock();
1751 }
1752
1753 static int team_set_mac_address(struct net_device *dev, void *p)
1754 {
1755 struct sockaddr *addr = p;
1756 struct team *team = netdev_priv(dev);
1757 struct team_port *port;
1758
1759 if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1760 return -EADDRNOTAVAIL;
1761 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1762 mutex_lock(&team->lock);
1763 list_for_each_entry(port, &team->port_list, list)
1764 if (team->ops.port_change_dev_addr)
1765 team->ops.port_change_dev_addr(team, port);
1766 mutex_unlock(&team->lock);
1767 return 0;
1768 }
1769
1770 static int team_change_mtu(struct net_device *dev, int new_mtu)
1771 {
1772 struct team *team = netdev_priv(dev);
1773 struct team_port *port;
1774 int err;
1775
1776 /*
1777 * Alhough this is reader, it's guarded by team lock. It's not possible
1778 * to traverse list in reverse under rcu_read_lock
1779 */
1780 mutex_lock(&team->lock);
1781 team->port_mtu_change_allowed = true;
1782 list_for_each_entry(port, &team->port_list, list) {
1783 err = dev_set_mtu(port->dev, new_mtu);
1784 if (err) {
1785 netdev_err(dev, "Device %s failed to change mtu",
1786 port->dev->name);
1787 goto unwind;
1788 }
1789 }
1790 team->port_mtu_change_allowed = false;
1791 mutex_unlock(&team->lock);
1792
1793 dev->mtu = new_mtu;
1794
1795 return 0;
1796
1797 unwind:
1798 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1799 dev_set_mtu(port->dev, dev->mtu);
1800 team->port_mtu_change_allowed = false;
1801 mutex_unlock(&team->lock);
1802
1803 return err;
1804 }
1805
1806 static struct rtnl_link_stats64 *
1807 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1808 {
1809 struct team *team = netdev_priv(dev);
1810 struct team_pcpu_stats *p;
1811 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1812 u32 rx_dropped = 0, tx_dropped = 0, rx_nohandler = 0;
1813 unsigned int start;
1814 int i;
1815
1816 for_each_possible_cpu(i) {
1817 p = per_cpu_ptr(team->pcpu_stats, i);
1818 do {
1819 start = u64_stats_fetch_begin_irq(&p->syncp);
1820 rx_packets = p->rx_packets;
1821 rx_bytes = p->rx_bytes;
1822 rx_multicast = p->rx_multicast;
1823 tx_packets = p->tx_packets;
1824 tx_bytes = p->tx_bytes;
1825 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
1826
1827 stats->rx_packets += rx_packets;
1828 stats->rx_bytes += rx_bytes;
1829 stats->multicast += rx_multicast;
1830 stats->tx_packets += tx_packets;
1831 stats->tx_bytes += tx_bytes;
1832 /*
1833 * rx_dropped, tx_dropped & rx_nohandler are u32,
1834 * updated without syncp protection.
1835 */
1836 rx_dropped += p->rx_dropped;
1837 tx_dropped += p->tx_dropped;
1838 rx_nohandler += p->rx_nohandler;
1839 }
1840 stats->rx_dropped = rx_dropped;
1841 stats->tx_dropped = tx_dropped;
1842 stats->rx_nohandler = rx_nohandler;
1843 return stats;
1844 }
1845
1846 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1847 {
1848 struct team *team = netdev_priv(dev);
1849 struct team_port *port;
1850 int err;
1851
1852 /*
1853 * Alhough this is reader, it's guarded by team lock. It's not possible
1854 * to traverse list in reverse under rcu_read_lock
1855 */
1856 mutex_lock(&team->lock);
1857 list_for_each_entry(port, &team->port_list, list) {
1858 err = vlan_vid_add(port->dev, proto, vid);
1859 if (err)
1860 goto unwind;
1861 }
1862 mutex_unlock(&team->lock);
1863
1864 return 0;
1865
1866 unwind:
1867 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1868 vlan_vid_del(port->dev, proto, vid);
1869 mutex_unlock(&team->lock);
1870
1871 return err;
1872 }
1873
1874 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1875 {
1876 struct team *team = netdev_priv(dev);
1877 struct team_port *port;
1878
1879 mutex_lock(&team->lock);
1880 list_for_each_entry(port, &team->port_list, list)
1881 vlan_vid_del(port->dev, proto, vid);
1882 mutex_unlock(&team->lock);
1883
1884 return 0;
1885 }
1886
1887 #ifdef CONFIG_NET_POLL_CONTROLLER
1888 static void team_poll_controller(struct net_device *dev)
1889 {
1890 }
1891
1892 static void __team_netpoll_cleanup(struct team *team)
1893 {
1894 struct team_port *port;
1895
1896 list_for_each_entry(port, &team->port_list, list)
1897 team_port_disable_netpoll(port);
1898 }
1899
1900 static void team_netpoll_cleanup(struct net_device *dev)
1901 {
1902 struct team *team = netdev_priv(dev);
1903
1904 mutex_lock(&team->lock);
1905 __team_netpoll_cleanup(team);
1906 mutex_unlock(&team->lock);
1907 }
1908
1909 static int team_netpoll_setup(struct net_device *dev,
1910 struct netpoll_info *npifo)
1911 {
1912 struct team *team = netdev_priv(dev);
1913 struct team_port *port;
1914 int err = 0;
1915
1916 mutex_lock(&team->lock);
1917 list_for_each_entry(port, &team->port_list, list) {
1918 err = team_port_enable_netpoll(team, port);
1919 if (err) {
1920 __team_netpoll_cleanup(team);
1921 break;
1922 }
1923 }
1924 mutex_unlock(&team->lock);
1925 return err;
1926 }
1927 #endif
1928
1929 static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
1930 {
1931 struct team *team = netdev_priv(dev);
1932 int err;
1933
1934 mutex_lock(&team->lock);
1935 err = team_port_add(team, port_dev);
1936 mutex_unlock(&team->lock);
1937 return err;
1938 }
1939
1940 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1941 {
1942 struct team *team = netdev_priv(dev);
1943 int err;
1944
1945 mutex_lock(&team->lock);
1946 err = team_port_del(team, port_dev);
1947 mutex_unlock(&team->lock);
1948 return err;
1949 }
1950
1951 static netdev_features_t team_fix_features(struct net_device *dev,
1952 netdev_features_t features)
1953 {
1954 struct team_port *port;
1955 struct team *team = netdev_priv(dev);
1956 netdev_features_t mask;
1957
1958 mask = features;
1959 features &= ~NETIF_F_ONE_FOR_ALL;
1960 features |= NETIF_F_ALL_FOR_ALL;
1961
1962 rcu_read_lock();
1963 list_for_each_entry_rcu(port, &team->port_list, list) {
1964 features = netdev_increment_features(features,
1965 port->dev->features,
1966 mask);
1967 }
1968 rcu_read_unlock();
1969
1970 features = netdev_add_tso_features(features, mask);
1971
1972 return features;
1973 }
1974
1975 static int team_change_carrier(struct net_device *dev, bool new_carrier)
1976 {
1977 struct team *team = netdev_priv(dev);
1978
1979 team->user_carrier_enabled = true;
1980
1981 if (new_carrier)
1982 netif_carrier_on(dev);
1983 else
1984 netif_carrier_off(dev);
1985 return 0;
1986 }
1987
1988 static const struct net_device_ops team_netdev_ops = {
1989 .ndo_init = team_init,
1990 .ndo_uninit = team_uninit,
1991 .ndo_open = team_open,
1992 .ndo_stop = team_close,
1993 .ndo_start_xmit = team_xmit,
1994 .ndo_select_queue = team_select_queue,
1995 .ndo_change_rx_flags = team_change_rx_flags,
1996 .ndo_set_rx_mode = team_set_rx_mode,
1997 .ndo_set_mac_address = team_set_mac_address,
1998 .ndo_change_mtu = team_change_mtu,
1999 .ndo_get_stats64 = team_get_stats64,
2000 .ndo_vlan_rx_add_vid = team_vlan_rx_add_vid,
2001 .ndo_vlan_rx_kill_vid = team_vlan_rx_kill_vid,
2002 #ifdef CONFIG_NET_POLL_CONTROLLER
2003 .ndo_poll_controller = team_poll_controller,
2004 .ndo_netpoll_setup = team_netpoll_setup,
2005 .ndo_netpoll_cleanup = team_netpoll_cleanup,
2006 #endif
2007 .ndo_add_slave = team_add_slave,
2008 .ndo_del_slave = team_del_slave,
2009 .ndo_fix_features = team_fix_features,
2010 .ndo_change_carrier = team_change_carrier,
2011 .ndo_bridge_setlink = switchdev_port_bridge_setlink,
2012 .ndo_bridge_getlink = switchdev_port_bridge_getlink,
2013 .ndo_bridge_dellink = switchdev_port_bridge_dellink,
2014 .ndo_fdb_add = switchdev_port_fdb_add,
2015 .ndo_fdb_del = switchdev_port_fdb_del,
2016 .ndo_fdb_dump = switchdev_port_fdb_dump,
2017 .ndo_features_check = passthru_features_check,
2018 };
2019
2020 /***********************
2021 * ethtool interface
2022 ***********************/
2023
2024 static void team_ethtool_get_drvinfo(struct net_device *dev,
2025 struct ethtool_drvinfo *drvinfo)
2026 {
2027 strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
2028 strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2029 }
2030
2031 static const struct ethtool_ops team_ethtool_ops = {
2032 .get_drvinfo = team_ethtool_get_drvinfo,
2033 .get_link = ethtool_op_get_link,
2034 };
2035
2036 /***********************
2037 * rt netlink interface
2038 ***********************/
2039
2040 static void team_setup_by_port(struct net_device *dev,
2041 struct net_device *port_dev)
2042 {
2043 dev->header_ops = port_dev->header_ops;
2044 dev->type = port_dev->type;
2045 dev->hard_header_len = port_dev->hard_header_len;
2046 dev->addr_len = port_dev->addr_len;
2047 dev->mtu = port_dev->mtu;
2048 memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2049 eth_hw_addr_inherit(dev, port_dev);
2050 }
2051
2052 static int team_dev_type_check_change(struct net_device *dev,
2053 struct net_device *port_dev)
2054 {
2055 struct team *team = netdev_priv(dev);
2056 char *portname = port_dev->name;
2057 int err;
2058
2059 if (dev->type == port_dev->type)
2060 return 0;
2061 if (!list_empty(&team->port_list)) {
2062 netdev_err(dev, "Device %s is of different type\n", portname);
2063 return -EBUSY;
2064 }
2065 err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2066 err = notifier_to_errno(err);
2067 if (err) {
2068 netdev_err(dev, "Refused to change device type\n");
2069 return err;
2070 }
2071 dev_uc_flush(dev);
2072 dev_mc_flush(dev);
2073 team_setup_by_port(dev, port_dev);
2074 call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2075 return 0;
2076 }
2077
2078 static void team_setup(struct net_device *dev)
2079 {
2080 ether_setup(dev);
2081
2082 dev->netdev_ops = &team_netdev_ops;
2083 dev->ethtool_ops = &team_ethtool_ops;
2084 dev->destructor = team_destructor;
2085 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2086 dev->priv_flags |= IFF_NO_QUEUE;
2087 dev->priv_flags |= IFF_TEAM;
2088
2089 /*
2090 * Indicate we support unicast address filtering. That way core won't
2091 * bring us to promisc mode in case a unicast addr is added.
2092 * Let this up to underlay drivers.
2093 */
2094 dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2095
2096 dev->features |= NETIF_F_LLTX;
2097 dev->features |= NETIF_F_GRO;
2098
2099 /* Don't allow team devices to change network namespaces. */
2100 dev->features |= NETIF_F_NETNS_LOCAL;
2101
2102 dev->hw_features = TEAM_VLAN_FEATURES |
2103 NETIF_F_HW_VLAN_CTAG_TX |
2104 NETIF_F_HW_VLAN_CTAG_RX |
2105 NETIF_F_HW_VLAN_CTAG_FILTER;
2106
2107 dev->hw_features |= NETIF_F_GSO_ENCAP_ALL;
2108 dev->features |= dev->hw_features;
2109 }
2110
2111 static int team_newlink(struct net *src_net, struct net_device *dev,
2112 struct nlattr *tb[], struct nlattr *data[])
2113 {
2114 if (tb[IFLA_ADDRESS] == NULL)
2115 eth_hw_addr_random(dev);
2116
2117 return register_netdevice(dev);
2118 }
2119
2120 static int team_validate(struct nlattr *tb[], struct nlattr *data[])
2121 {
2122 if (tb[IFLA_ADDRESS]) {
2123 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2124 return -EINVAL;
2125 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2126 return -EADDRNOTAVAIL;
2127 }
2128 return 0;
2129 }
2130
2131 static unsigned int team_get_num_tx_queues(void)
2132 {
2133 return TEAM_DEFAULT_NUM_TX_QUEUES;
2134 }
2135
2136 static unsigned int team_get_num_rx_queues(void)
2137 {
2138 return TEAM_DEFAULT_NUM_RX_QUEUES;
2139 }
2140
2141 static struct rtnl_link_ops team_link_ops __read_mostly = {
2142 .kind = DRV_NAME,
2143 .priv_size = sizeof(struct team),
2144 .setup = team_setup,
2145 .newlink = team_newlink,
2146 .validate = team_validate,
2147 .get_num_tx_queues = team_get_num_tx_queues,
2148 .get_num_rx_queues = team_get_num_rx_queues,
2149 };
2150
2151
2152 /***********************************
2153 * Generic netlink custom interface
2154 ***********************************/
2155
2156 static struct genl_family team_nl_family = {
2157 .id = GENL_ID_GENERATE,
2158 .name = TEAM_GENL_NAME,
2159 .version = TEAM_GENL_VERSION,
2160 .maxattr = TEAM_ATTR_MAX,
2161 .netnsok = true,
2162 };
2163
2164 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2165 [TEAM_ATTR_UNSPEC] = { .type = NLA_UNSPEC, },
2166 [TEAM_ATTR_TEAM_IFINDEX] = { .type = NLA_U32 },
2167 [TEAM_ATTR_LIST_OPTION] = { .type = NLA_NESTED },
2168 [TEAM_ATTR_LIST_PORT] = { .type = NLA_NESTED },
2169 };
2170
2171 static const struct nla_policy
2172 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2173 [TEAM_ATTR_OPTION_UNSPEC] = { .type = NLA_UNSPEC, },
2174 [TEAM_ATTR_OPTION_NAME] = {
2175 .type = NLA_STRING,
2176 .len = TEAM_STRING_MAX_LEN,
2177 },
2178 [TEAM_ATTR_OPTION_CHANGED] = { .type = NLA_FLAG },
2179 [TEAM_ATTR_OPTION_TYPE] = { .type = NLA_U8 },
2180 [TEAM_ATTR_OPTION_DATA] = { .type = NLA_BINARY },
2181 };
2182
2183 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2184 {
2185 struct sk_buff *msg;
2186 void *hdr;
2187 int err;
2188
2189 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2190 if (!msg)
2191 return -ENOMEM;
2192
2193 hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2194 &team_nl_family, 0, TEAM_CMD_NOOP);
2195 if (!hdr) {
2196 err = -EMSGSIZE;
2197 goto err_msg_put;
2198 }
2199
2200 genlmsg_end(msg, hdr);
2201
2202 return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2203
2204 err_msg_put:
2205 nlmsg_free(msg);
2206
2207 return err;
2208 }
2209
2210 /*
2211 * Netlink cmd functions should be locked by following two functions.
2212 * Since dev gets held here, that ensures dev won't disappear in between.
2213 */
2214 static struct team *team_nl_team_get(struct genl_info *info)
2215 {
2216 struct net *net = genl_info_net(info);
2217 int ifindex;
2218 struct net_device *dev;
2219 struct team *team;
2220
2221 if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2222 return NULL;
2223
2224 ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2225 dev = dev_get_by_index(net, ifindex);
2226 if (!dev || dev->netdev_ops != &team_netdev_ops) {
2227 if (dev)
2228 dev_put(dev);
2229 return NULL;
2230 }
2231
2232 team = netdev_priv(dev);
2233 mutex_lock(&team->lock);
2234 return team;
2235 }
2236
2237 static void team_nl_team_put(struct team *team)
2238 {
2239 mutex_unlock(&team->lock);
2240 dev_put(team->dev);
2241 }
2242
2243 typedef int team_nl_send_func_t(struct sk_buff *skb,
2244 struct team *team, u32 portid);
2245
2246 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2247 {
2248 return genlmsg_unicast(dev_net(team->dev), skb, portid);
2249 }
2250
2251 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2252 struct team_option_inst *opt_inst)
2253 {
2254 struct nlattr *option_item;
2255 struct team_option *option = opt_inst->option;
2256 struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2257 struct team_gsetter_ctx ctx;
2258 int err;
2259
2260 ctx.info = opt_inst_info;
2261 err = team_option_get(team, opt_inst, &ctx);
2262 if (err)
2263 return err;
2264
2265 option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
2266 if (!option_item)
2267 return -EMSGSIZE;
2268
2269 if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2270 goto nest_cancel;
2271 if (opt_inst_info->port &&
2272 nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2273 opt_inst_info->port->dev->ifindex))
2274 goto nest_cancel;
2275 if (opt_inst->option->array_size &&
2276 nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2277 opt_inst_info->array_index))
2278 goto nest_cancel;
2279
2280 switch (option->type) {
2281 case TEAM_OPTION_TYPE_U32:
2282 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2283 goto nest_cancel;
2284 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2285 goto nest_cancel;
2286 break;
2287 case TEAM_OPTION_TYPE_STRING:
2288 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2289 goto nest_cancel;
2290 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2291 ctx.data.str_val))
2292 goto nest_cancel;
2293 break;
2294 case TEAM_OPTION_TYPE_BINARY:
2295 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2296 goto nest_cancel;
2297 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2298 ctx.data.bin_val.ptr))
2299 goto nest_cancel;
2300 break;
2301 case TEAM_OPTION_TYPE_BOOL:
2302 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2303 goto nest_cancel;
2304 if (ctx.data.bool_val &&
2305 nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2306 goto nest_cancel;
2307 break;
2308 case TEAM_OPTION_TYPE_S32:
2309 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2310 goto nest_cancel;
2311 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2312 goto nest_cancel;
2313 break;
2314 default:
2315 BUG();
2316 }
2317 if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2318 goto nest_cancel;
2319 if (opt_inst->changed) {
2320 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2321 goto nest_cancel;
2322 opt_inst->changed = false;
2323 }
2324 nla_nest_end(skb, option_item);
2325 return 0;
2326
2327 nest_cancel:
2328 nla_nest_cancel(skb, option_item);
2329 return -EMSGSIZE;
2330 }
2331
2332 static int __send_and_alloc_skb(struct sk_buff **pskb,
2333 struct team *team, u32 portid,
2334 team_nl_send_func_t *send_func)
2335 {
2336 int err;
2337
2338 if (*pskb) {
2339 err = send_func(*pskb, team, portid);
2340 if (err)
2341 return err;
2342 }
2343 *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2344 if (!*pskb)
2345 return -ENOMEM;
2346 return 0;
2347 }
2348
2349 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2350 int flags, team_nl_send_func_t *send_func,
2351 struct list_head *sel_opt_inst_list)
2352 {
2353 struct nlattr *option_list;
2354 struct nlmsghdr *nlh;
2355 void *hdr;
2356 struct team_option_inst *opt_inst;
2357 int err;
2358 struct sk_buff *skb = NULL;
2359 bool incomplete;
2360 int i;
2361
2362 opt_inst = list_first_entry(sel_opt_inst_list,
2363 struct team_option_inst, tmp_list);
2364
2365 start_again:
2366 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2367 if (err)
2368 return err;
2369
2370 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2371 TEAM_CMD_OPTIONS_GET);
2372 if (!hdr)
2373 return -EMSGSIZE;
2374
2375 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2376 goto nla_put_failure;
2377 option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2378 if (!option_list)
2379 goto nla_put_failure;
2380
2381 i = 0;
2382 incomplete = false;
2383 list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2384 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2385 if (err) {
2386 if (err == -EMSGSIZE) {
2387 if (!i)
2388 goto errout;
2389 incomplete = true;
2390 break;
2391 }
2392 goto errout;
2393 }
2394 i++;
2395 }
2396
2397 nla_nest_end(skb, option_list);
2398 genlmsg_end(skb, hdr);
2399 if (incomplete)
2400 goto start_again;
2401
2402 send_done:
2403 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2404 if (!nlh) {
2405 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2406 if (err)
2407 goto errout;
2408 goto send_done;
2409 }
2410
2411 return send_func(skb, team, portid);
2412
2413 nla_put_failure:
2414 err = -EMSGSIZE;
2415 errout:
2416 genlmsg_cancel(skb, hdr);
2417 nlmsg_free(skb);
2418 return err;
2419 }
2420
2421 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2422 {
2423 struct team *team;
2424 struct team_option_inst *opt_inst;
2425 int err;
2426 LIST_HEAD(sel_opt_inst_list);
2427
2428 team = team_nl_team_get(info);
2429 if (!team)
2430 return -EINVAL;
2431
2432 list_for_each_entry(opt_inst, &team->option_inst_list, list)
2433 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2434 err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2435 NLM_F_ACK, team_nl_send_unicast,
2436 &sel_opt_inst_list);
2437
2438 team_nl_team_put(team);
2439
2440 return err;
2441 }
2442
2443 static int team_nl_send_event_options_get(struct team *team,
2444 struct list_head *sel_opt_inst_list);
2445
2446 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2447 {
2448 struct team *team;
2449 int err = 0;
2450 int i;
2451 struct nlattr *nl_option;
2452 LIST_HEAD(opt_inst_list);
2453
2454 rtnl_lock();
2455
2456 team = team_nl_team_get(info);
2457 if (!team) {
2458 err = -EINVAL;
2459 goto rtnl_unlock;
2460 }
2461
2462 err = -EINVAL;
2463 if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2464 err = -EINVAL;
2465 goto team_put;
2466 }
2467
2468 nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2469 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2470 struct nlattr *attr;
2471 struct nlattr *attr_data;
2472 enum team_option_type opt_type;
2473 int opt_port_ifindex = 0; /* != 0 for per-port options */
2474 u32 opt_array_index = 0;
2475 bool opt_is_array = false;
2476 struct team_option_inst *opt_inst;
2477 char *opt_name;
2478 bool opt_found = false;
2479
2480 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2481 err = -EINVAL;
2482 goto team_put;
2483 }
2484 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2485 nl_option, team_nl_option_policy);
2486 if (err)
2487 goto team_put;
2488 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2489 !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2490 err = -EINVAL;
2491 goto team_put;
2492 }
2493 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2494 case NLA_U32:
2495 opt_type = TEAM_OPTION_TYPE_U32;
2496 break;
2497 case NLA_STRING:
2498 opt_type = TEAM_OPTION_TYPE_STRING;
2499 break;
2500 case NLA_BINARY:
2501 opt_type = TEAM_OPTION_TYPE_BINARY;
2502 break;
2503 case NLA_FLAG:
2504 opt_type = TEAM_OPTION_TYPE_BOOL;
2505 break;
2506 case NLA_S32:
2507 opt_type = TEAM_OPTION_TYPE_S32;
2508 break;
2509 default:
2510 goto team_put;
2511 }
2512
2513 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2514 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2515 err = -EINVAL;
2516 goto team_put;
2517 }
2518
2519 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2520 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2521 if (attr)
2522 opt_port_ifindex = nla_get_u32(attr);
2523
2524 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2525 if (attr) {
2526 opt_is_array = true;
2527 opt_array_index = nla_get_u32(attr);
2528 }
2529
2530 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2531 struct team_option *option = opt_inst->option;
2532 struct team_gsetter_ctx ctx;
2533 struct team_option_inst_info *opt_inst_info;
2534 int tmp_ifindex;
2535
2536 opt_inst_info = &opt_inst->info;
2537 tmp_ifindex = opt_inst_info->port ?
2538 opt_inst_info->port->dev->ifindex : 0;
2539 if (option->type != opt_type ||
2540 strcmp(option->name, opt_name) ||
2541 tmp_ifindex != opt_port_ifindex ||
2542 (option->array_size && !opt_is_array) ||
2543 opt_inst_info->array_index != opt_array_index)
2544 continue;
2545 opt_found = true;
2546 ctx.info = opt_inst_info;
2547 switch (opt_type) {
2548 case TEAM_OPTION_TYPE_U32:
2549 ctx.data.u32_val = nla_get_u32(attr_data);
2550 break;
2551 case TEAM_OPTION_TYPE_STRING:
2552 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2553 err = -EINVAL;
2554 goto team_put;
2555 }
2556 ctx.data.str_val = nla_data(attr_data);
2557 break;
2558 case TEAM_OPTION_TYPE_BINARY:
2559 ctx.data.bin_val.len = nla_len(attr_data);
2560 ctx.data.bin_val.ptr = nla_data(attr_data);
2561 break;
2562 case TEAM_OPTION_TYPE_BOOL:
2563 ctx.data.bool_val = attr_data ? true : false;
2564 break;
2565 case TEAM_OPTION_TYPE_S32:
2566 ctx.data.s32_val = nla_get_s32(attr_data);
2567 break;
2568 default:
2569 BUG();
2570 }
2571 err = team_option_set(team, opt_inst, &ctx);
2572 if (err)
2573 goto team_put;
2574 opt_inst->changed = true;
2575 list_add(&opt_inst->tmp_list, &opt_inst_list);
2576 }
2577 if (!opt_found) {
2578 err = -ENOENT;
2579 goto team_put;
2580 }
2581 }
2582
2583 err = team_nl_send_event_options_get(team, &opt_inst_list);
2584
2585 team_put:
2586 team_nl_team_put(team);
2587 rtnl_unlock:
2588 rtnl_unlock();
2589 return err;
2590 }
2591
2592 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2593 struct team_port *port)
2594 {
2595 struct nlattr *port_item;
2596
2597 port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2598 if (!port_item)
2599 goto nest_cancel;
2600 if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2601 goto nest_cancel;
2602 if (port->changed) {
2603 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2604 goto nest_cancel;
2605 port->changed = false;
2606 }
2607 if ((port->removed &&
2608 nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2609 (port->state.linkup &&
2610 nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2611 nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2612 nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2613 goto nest_cancel;
2614 nla_nest_end(skb, port_item);
2615 return 0;
2616
2617 nest_cancel:
2618 nla_nest_cancel(skb, port_item);
2619 return -EMSGSIZE;
2620 }
2621
2622 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2623 int flags, team_nl_send_func_t *send_func,
2624 struct team_port *one_port)
2625 {
2626 struct nlattr *port_list;
2627 struct nlmsghdr *nlh;
2628 void *hdr;
2629 struct team_port *port;
2630 int err;
2631 struct sk_buff *skb = NULL;
2632 bool incomplete;
2633 int i;
2634
2635 port = list_first_entry_or_null(&team->port_list,
2636 struct team_port, list);
2637
2638 start_again:
2639 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2640 if (err)
2641 return err;
2642
2643 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2644 TEAM_CMD_PORT_LIST_GET);
2645 if (!hdr)
2646 return -EMSGSIZE;
2647
2648 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2649 goto nla_put_failure;
2650 port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2651 if (!port_list)
2652 goto nla_put_failure;
2653
2654 i = 0;
2655 incomplete = false;
2656
2657 /* If one port is selected, called wants to send port list containing
2658 * only this port. Otherwise go through all listed ports and send all
2659 */
2660 if (one_port) {
2661 err = team_nl_fill_one_port_get(skb, one_port);
2662 if (err)
2663 goto errout;
2664 } else if (port) {
2665 list_for_each_entry_from(port, &team->port_list, list) {
2666 err = team_nl_fill_one_port_get(skb, port);
2667 if (err) {
2668 if (err == -EMSGSIZE) {
2669 if (!i)
2670 goto errout;
2671 incomplete = true;
2672 break;
2673 }
2674 goto errout;
2675 }
2676 i++;
2677 }
2678 }
2679
2680 nla_nest_end(skb, port_list);
2681 genlmsg_end(skb, hdr);
2682 if (incomplete)
2683 goto start_again;
2684
2685 send_done:
2686 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2687 if (!nlh) {
2688 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2689 if (err)
2690 goto errout;
2691 goto send_done;
2692 }
2693
2694 return send_func(skb, team, portid);
2695
2696 nla_put_failure:
2697 err = -EMSGSIZE;
2698 errout:
2699 genlmsg_cancel(skb, hdr);
2700 nlmsg_free(skb);
2701 return err;
2702 }
2703
2704 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2705 struct genl_info *info)
2706 {
2707 struct team *team;
2708 int err;
2709
2710 team = team_nl_team_get(info);
2711 if (!team)
2712 return -EINVAL;
2713
2714 err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2715 NLM_F_ACK, team_nl_send_unicast, NULL);
2716
2717 team_nl_team_put(team);
2718
2719 return err;
2720 }
2721
2722 static const struct genl_ops team_nl_ops[] = {
2723 {
2724 .cmd = TEAM_CMD_NOOP,
2725 .doit = team_nl_cmd_noop,
2726 .policy = team_nl_policy,
2727 },
2728 {
2729 .cmd = TEAM_CMD_OPTIONS_SET,
2730 .doit = team_nl_cmd_options_set,
2731 .policy = team_nl_policy,
2732 .flags = GENL_ADMIN_PERM,
2733 },
2734 {
2735 .cmd = TEAM_CMD_OPTIONS_GET,
2736 .doit = team_nl_cmd_options_get,
2737 .policy = team_nl_policy,
2738 .flags = GENL_ADMIN_PERM,
2739 },
2740 {
2741 .cmd = TEAM_CMD_PORT_LIST_GET,
2742 .doit = team_nl_cmd_port_list_get,
2743 .policy = team_nl_policy,
2744 .flags = GENL_ADMIN_PERM,
2745 },
2746 };
2747
2748 static const struct genl_multicast_group team_nl_mcgrps[] = {
2749 { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2750 };
2751
2752 static int team_nl_send_multicast(struct sk_buff *skb,
2753 struct team *team, u32 portid)
2754 {
2755 return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2756 skb, 0, 0, GFP_KERNEL);
2757 }
2758
2759 static int team_nl_send_event_options_get(struct team *team,
2760 struct list_head *sel_opt_inst_list)
2761 {
2762 return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2763 sel_opt_inst_list);
2764 }
2765
2766 static int team_nl_send_event_port_get(struct team *team,
2767 struct team_port *port)
2768 {
2769 return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2770 port);
2771 }
2772
2773 static int team_nl_init(void)
2774 {
2775 return genl_register_family_with_ops_groups(&team_nl_family, team_nl_ops,
2776 team_nl_mcgrps);
2777 }
2778
2779 static void team_nl_fini(void)
2780 {
2781 genl_unregister_family(&team_nl_family);
2782 }
2783
2784
2785 /******************
2786 * Change checkers
2787 ******************/
2788
2789 static void __team_options_change_check(struct team *team)
2790 {
2791 int err;
2792 struct team_option_inst *opt_inst;
2793 LIST_HEAD(sel_opt_inst_list);
2794
2795 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2796 if (opt_inst->changed)
2797 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2798 }
2799 err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2800 if (err && err != -ESRCH)
2801 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2802 err);
2803 }
2804
2805 /* rtnl lock is held */
2806
2807 static void __team_port_change_send(struct team_port *port, bool linkup)
2808 {
2809 int err;
2810
2811 port->changed = true;
2812 port->state.linkup = linkup;
2813 team_refresh_port_linkup(port);
2814 if (linkup) {
2815 struct ethtool_link_ksettings ecmd;
2816
2817 err = __ethtool_get_link_ksettings(port->dev, &ecmd);
2818 if (!err) {
2819 port->state.speed = ecmd.base.speed;
2820 port->state.duplex = ecmd.base.duplex;
2821 goto send_event;
2822 }
2823 }
2824 port->state.speed = 0;
2825 port->state.duplex = 0;
2826
2827 send_event:
2828 err = team_nl_send_event_port_get(port->team, port);
2829 if (err && err != -ESRCH)
2830 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2831 port->dev->name, err);
2832
2833 }
2834
2835 static void __team_carrier_check(struct team *team)
2836 {
2837 struct team_port *port;
2838 bool team_linkup;
2839
2840 if (team->user_carrier_enabled)
2841 return;
2842
2843 team_linkup = false;
2844 list_for_each_entry(port, &team->port_list, list) {
2845 if (port->linkup) {
2846 team_linkup = true;
2847 break;
2848 }
2849 }
2850
2851 if (team_linkup)
2852 netif_carrier_on(team->dev);
2853 else
2854 netif_carrier_off(team->dev);
2855 }
2856
2857 static void __team_port_change_check(struct team_port *port, bool linkup)
2858 {
2859 if (port->state.linkup != linkup)
2860 __team_port_change_send(port, linkup);
2861 __team_carrier_check(port->team);
2862 }
2863
2864 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2865 {
2866 __team_port_change_send(port, linkup);
2867 __team_carrier_check(port->team);
2868 }
2869
2870 static void __team_port_change_port_removed(struct team_port *port)
2871 {
2872 port->removed = true;
2873 __team_port_change_send(port, false);
2874 __team_carrier_check(port->team);
2875 }
2876
2877 static void team_port_change_check(struct team_port *port, bool linkup)
2878 {
2879 struct team *team = port->team;
2880
2881 mutex_lock(&team->lock);
2882 __team_port_change_check(port, linkup);
2883 mutex_unlock(&team->lock);
2884 }
2885
2886
2887 /************************************
2888 * Net device notifier event handler
2889 ************************************/
2890
2891 static int team_device_event(struct notifier_block *unused,
2892 unsigned long event, void *ptr)
2893 {
2894 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2895 struct team_port *port;
2896
2897 port = team_port_get_rtnl(dev);
2898 if (!port)
2899 return NOTIFY_DONE;
2900
2901 switch (event) {
2902 case NETDEV_UP:
2903 if (netif_carrier_ok(dev))
2904 team_port_change_check(port, true);
2905 break;
2906 case NETDEV_DOWN:
2907 team_port_change_check(port, false);
2908 break;
2909 case NETDEV_CHANGE:
2910 if (netif_running(port->dev))
2911 team_port_change_check(port,
2912 !!netif_carrier_ok(port->dev));
2913 break;
2914 case NETDEV_UNREGISTER:
2915 team_del_slave(port->team->dev, dev);
2916 break;
2917 case NETDEV_FEAT_CHANGE:
2918 team_compute_features(port->team);
2919 break;
2920 case NETDEV_PRECHANGEMTU:
2921 /* Forbid to change mtu of underlaying device */
2922 if (!port->team->port_mtu_change_allowed)
2923 return NOTIFY_BAD;
2924 break;
2925 case NETDEV_PRE_TYPE_CHANGE:
2926 /* Forbid to change type of underlaying device */
2927 return NOTIFY_BAD;
2928 case NETDEV_RESEND_IGMP:
2929 /* Propagate to master device */
2930 call_netdevice_notifiers(event, port->team->dev);
2931 break;
2932 }
2933 return NOTIFY_DONE;
2934 }
2935
2936 static struct notifier_block team_notifier_block __read_mostly = {
2937 .notifier_call = team_device_event,
2938 };
2939
2940
2941 /***********************
2942 * Module init and exit
2943 ***********************/
2944
2945 static int __init team_module_init(void)
2946 {
2947 int err;
2948
2949 register_netdevice_notifier(&team_notifier_block);
2950
2951 err = rtnl_link_register(&team_link_ops);
2952 if (err)
2953 goto err_rtnl_reg;
2954
2955 err = team_nl_init();
2956 if (err)
2957 goto err_nl_init;
2958
2959 return 0;
2960
2961 err_nl_init:
2962 rtnl_link_unregister(&team_link_ops);
2963
2964 err_rtnl_reg:
2965 unregister_netdevice_notifier(&team_notifier_block);
2966
2967 return err;
2968 }
2969
2970 static void __exit team_module_exit(void)
2971 {
2972 team_nl_fini();
2973 rtnl_link_unregister(&team_link_ops);
2974 unregister_netdevice_notifier(&team_notifier_block);
2975 }
2976
2977 module_init(team_module_init);
2978 module_exit(team_module_exit);
2979
2980 MODULE_LICENSE("GPL v2");
2981 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
2982 MODULE_DESCRIPTION("Ethernet team device driver");
2983 MODULE_ALIAS_RTNL_LINK(DRV_NAME);
Linux kernel - Deliverables
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