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ARM: dts: add 'dr_mode' property to hsotg devices for exynos boards
[linux/fpc-iii.git] / drivers / net / team / team.c
blob93e224217e24b36b089102be11ada5921f62d83b
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 <generated/utsrelease.h>
32 #include <linux/if_team.h>
33
34 #define DRV_NAME "team"
35
36
37 /**********
38 * Helpers
39 **********/
40
41 #define team_port_exists(dev) (dev->priv_flags & IFF_TEAM_PORT)
42
43 static struct team_port *team_port_get_rcu(const struct net_device *dev)
44 {
45 struct team_port *port = rcu_dereference(dev->rx_handler_data);
46
47 return team_port_exists(dev) ? port : NULL;
48 }
49
50 static struct team_port *team_port_get_rtnl(const struct net_device *dev)
51 {
52 struct team_port *port = rtnl_dereference(dev->rx_handler_data);
53
54 return team_port_exists(dev) ? port : NULL;
55 }
56
57 /*
58 * Since the ability to change device address for open port device is tested in
59 * team_port_add, this function can be called without control of return value
60 */
61 static int __set_port_dev_addr(struct net_device *port_dev,
62 const unsigned char *dev_addr)
63 {
64 struct sockaddr addr;
65
66 memcpy(addr.sa_data, dev_addr, port_dev->addr_len);
67 addr.sa_family = port_dev->type;
68 return dev_set_mac_address(port_dev, &addr);
69 }
70
71 static int team_port_set_orig_dev_addr(struct team_port *port)
72 {
73 return __set_port_dev_addr(port->dev, port->orig.dev_addr);
74 }
75
76 static int team_port_set_team_dev_addr(struct team *team,
77 struct team_port *port)
78 {
79 return __set_port_dev_addr(port->dev, team->dev->dev_addr);
80 }
81
82 int team_modeop_port_enter(struct team *team, struct team_port *port)
83 {
84 return team_port_set_team_dev_addr(team, port);
85 }
86 EXPORT_SYMBOL(team_modeop_port_enter);
87
88 void team_modeop_port_change_dev_addr(struct team *team,
89 struct team_port *port)
90 {
91 team_port_set_team_dev_addr(team, port);
92 }
93 EXPORT_SYMBOL(team_modeop_port_change_dev_addr);
94
95 static void team_refresh_port_linkup(struct team_port *port)
96 {
97 port->linkup = port->user.linkup_enabled ? port->user.linkup :
98 port->state.linkup;
99 }
100
101
102 /*******************
103 * Options handling
104 *******************/
105
106 struct team_option_inst { /* One for each option instance */
107 struct list_head list;
108 struct list_head tmp_list;
109 struct team_option *option;
110 struct team_option_inst_info info;
111 bool changed;
112 bool removed;
113 };
114
115 static struct team_option *__team_find_option(struct team *team,
116 const char *opt_name)
117 {
118 struct team_option *option;
119
120 list_for_each_entry(option, &team->option_list, list) {
121 if (strcmp(option->name, opt_name) == 0)
122 return option;
123 }
124 return NULL;
125 }
126
127 static void __team_option_inst_del(struct team_option_inst *opt_inst)
128 {
129 list_del(&opt_inst->list);
130 kfree(opt_inst);
131 }
132
133 static void __team_option_inst_del_option(struct team *team,
134 struct team_option *option)
135 {
136 struct team_option_inst *opt_inst, *tmp;
137
138 list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
139 if (opt_inst->option == option)
140 __team_option_inst_del(opt_inst);
141 }
142 }
143
144 static int __team_option_inst_add(struct team *team, struct team_option *option,
145 struct team_port *port)
146 {
147 struct team_option_inst *opt_inst;
148 unsigned int array_size;
149 unsigned int i;
150 int err;
151
152 array_size = option->array_size;
153 if (!array_size)
154 array_size = 1; /* No array but still need one instance */
155
156 for (i = 0; i < array_size; i++) {
157 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL);
158 if (!opt_inst)
159 return -ENOMEM;
160 opt_inst->option = option;
161 opt_inst->info.port = port;
162 opt_inst->info.array_index = i;
163 opt_inst->changed = true;
164 opt_inst->removed = false;
165 list_add_tail(&opt_inst->list, &team->option_inst_list);
166 if (option->init) {
167 err = option->init(team, &opt_inst->info);
168 if (err)
169 return err;
170 }
171
172 }
173 return 0;
174 }
175
176 static int __team_option_inst_add_option(struct team *team,
177 struct team_option *option)
178 {
179 struct team_port *port;
180 int err;
181
182 if (!option->per_port) {
183 err = __team_option_inst_add(team, option, NULL);
184 if (err)
185 goto inst_del_option;
186 }
187
188 list_for_each_entry(port, &team->port_list, list) {
189 err = __team_option_inst_add(team, option, port);
190 if (err)
191 goto inst_del_option;
192 }
193 return 0;
194
195 inst_del_option:
196 __team_option_inst_del_option(team, option);
197 return err;
198 }
199
200 static void __team_option_inst_mark_removed_option(struct team *team,
201 struct team_option *option)
202 {
203 struct team_option_inst *opt_inst;
204
205 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
206 if (opt_inst->option == option) {
207 opt_inst->changed = true;
208 opt_inst->removed = true;
209 }
210 }
211 }
212
213 static void __team_option_inst_del_port(struct team *team,
214 struct team_port *port)
215 {
216 struct team_option_inst *opt_inst, *tmp;
217
218 list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
219 if (opt_inst->option->per_port &&
220 opt_inst->info.port == port)
221 __team_option_inst_del(opt_inst);
222 }
223 }
224
225 static int __team_option_inst_add_port(struct team *team,
226 struct team_port *port)
227 {
228 struct team_option *option;
229 int err;
230
231 list_for_each_entry(option, &team->option_list, list) {
232 if (!option->per_port)
233 continue;
234 err = __team_option_inst_add(team, option, port);
235 if (err)
236 goto inst_del_port;
237 }
238 return 0;
239
240 inst_del_port:
241 __team_option_inst_del_port(team, port);
242 return err;
243 }
244
245 static void __team_option_inst_mark_removed_port(struct team *team,
246 struct team_port *port)
247 {
248 struct team_option_inst *opt_inst;
249
250 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
251 if (opt_inst->info.port == port) {
252 opt_inst->changed = true;
253 opt_inst->removed = true;
254 }
255 }
256 }
257
258 static int __team_options_register(struct team *team,
259 const struct team_option *option,
260 size_t option_count)
261 {
262 int i;
263 struct team_option **dst_opts;
264 int err;
265
266 dst_opts = kzalloc(sizeof(struct team_option *) * option_count,
267 GFP_KERNEL);
268 if (!dst_opts)
269 return -ENOMEM;
270 for (i = 0; i < option_count; i++, option++) {
271 if (__team_find_option(team, option->name)) {
272 err = -EEXIST;
273 goto alloc_rollback;
274 }
275 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
276 if (!dst_opts[i]) {
277 err = -ENOMEM;
278 goto alloc_rollback;
279 }
280 }
281
282 for (i = 0; i < option_count; i++) {
283 err = __team_option_inst_add_option(team, dst_opts[i]);
284 if (err)
285 goto inst_rollback;
286 list_add_tail(&dst_opts[i]->list, &team->option_list);
287 }
288
289 kfree(dst_opts);
290 return 0;
291
292 inst_rollback:
293 for (i--; i >= 0; i--)
294 __team_option_inst_del_option(team, dst_opts[i]);
295
296 i = option_count - 1;
297 alloc_rollback:
298 for (i--; i >= 0; i--)
299 kfree(dst_opts[i]);
300
301 kfree(dst_opts);
302 return err;
303 }
304
305 static void __team_options_mark_removed(struct team *team,
306 const struct team_option *option,
307 size_t option_count)
308 {
309 int i;
310
311 for (i = 0; i < option_count; i++, option++) {
312 struct team_option *del_opt;
313
314 del_opt = __team_find_option(team, option->name);
315 if (del_opt)
316 __team_option_inst_mark_removed_option(team, del_opt);
317 }
318 }
319
320 static void __team_options_unregister(struct team *team,
321 const struct team_option *option,
322 size_t option_count)
323 {
324 int i;
325
326 for (i = 0; i < option_count; i++, option++) {
327 struct team_option *del_opt;
328
329 del_opt = __team_find_option(team, option->name);
330 if (del_opt) {
331 __team_option_inst_del_option(team, del_opt);
332 list_del(&del_opt->list);
333 kfree(del_opt);
334 }
335 }
336 }
337
338 static void __team_options_change_check(struct team *team);
339
340 int team_options_register(struct team *team,
341 const struct team_option *option,
342 size_t option_count)
343 {
344 int err;
345
346 err = __team_options_register(team, option, option_count);
347 if (err)
348 return err;
349 __team_options_change_check(team);
350 return 0;
351 }
352 EXPORT_SYMBOL(team_options_register);
353
354 void team_options_unregister(struct team *team,
355 const struct team_option *option,
356 size_t option_count)
357 {
358 __team_options_mark_removed(team, option, option_count);
359 __team_options_change_check(team);
360 __team_options_unregister(team, option, option_count);
361 }
362 EXPORT_SYMBOL(team_options_unregister);
363
364 static int team_option_get(struct team *team,
365 struct team_option_inst *opt_inst,
366 struct team_gsetter_ctx *ctx)
367 {
368 if (!opt_inst->option->getter)
369 return -EOPNOTSUPP;
370 return opt_inst->option->getter(team, ctx);
371 }
372
373 static int team_option_set(struct team *team,
374 struct team_option_inst *opt_inst,
375 struct team_gsetter_ctx *ctx)
376 {
377 if (!opt_inst->option->setter)
378 return -EOPNOTSUPP;
379 return opt_inst->option->setter(team, ctx);
380 }
381
382 void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info)
383 {
384 struct team_option_inst *opt_inst;
385
386 opt_inst = container_of(opt_inst_info, struct team_option_inst, info);
387 opt_inst->changed = true;
388 }
389 EXPORT_SYMBOL(team_option_inst_set_change);
390
391 void team_options_change_check(struct team *team)
392 {
393 __team_options_change_check(team);
394 }
395 EXPORT_SYMBOL(team_options_change_check);
396
397
398 /****************
399 * Mode handling
400 ****************/
401
402 static LIST_HEAD(mode_list);
403 static DEFINE_SPINLOCK(mode_list_lock);
404
405 struct team_mode_item {
406 struct list_head list;
407 const struct team_mode *mode;
408 };
409
410 static struct team_mode_item *__find_mode(const char *kind)
411 {
412 struct team_mode_item *mitem;
413
414 list_for_each_entry(mitem, &mode_list, list) {
415 if (strcmp(mitem->mode->kind, kind) == 0)
416 return mitem;
417 }
418 return NULL;
419 }
420
421 static bool is_good_mode_name(const char *name)
422 {
423 while (*name != '\0') {
424 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
425 return false;
426 name++;
427 }
428 return true;
429 }
430
431 int team_mode_register(const struct team_mode *mode)
432 {
433 int err = 0;
434 struct team_mode_item *mitem;
435
436 if (!is_good_mode_name(mode->kind) ||
437 mode->priv_size > TEAM_MODE_PRIV_SIZE)
438 return -EINVAL;
439
440 mitem = kmalloc(sizeof(*mitem), GFP_KERNEL);
441 if (!mitem)
442 return -ENOMEM;
443
444 spin_lock(&mode_list_lock);
445 if (__find_mode(mode->kind)) {
446 err = -EEXIST;
447 kfree(mitem);
448 goto unlock;
449 }
450 mitem->mode = mode;
451 list_add_tail(&mitem->list, &mode_list);
452 unlock:
453 spin_unlock(&mode_list_lock);
454 return err;
455 }
456 EXPORT_SYMBOL(team_mode_register);
457
458 void team_mode_unregister(const struct team_mode *mode)
459 {
460 struct team_mode_item *mitem;
461
462 spin_lock(&mode_list_lock);
463 mitem = __find_mode(mode->kind);
464 if (mitem) {
465 list_del_init(&mitem->list);
466 kfree(mitem);
467 }
468 spin_unlock(&mode_list_lock);
469 }
470 EXPORT_SYMBOL(team_mode_unregister);
471
472 static const struct team_mode *team_mode_get(const char *kind)
473 {
474 struct team_mode_item *mitem;
475 const struct team_mode *mode = NULL;
476
477 spin_lock(&mode_list_lock);
478 mitem = __find_mode(kind);
479 if (!mitem) {
480 spin_unlock(&mode_list_lock);
481 request_module("team-mode-%s", kind);
482 spin_lock(&mode_list_lock);
483 mitem = __find_mode(kind);
484 }
485 if (mitem) {
486 mode = mitem->mode;
487 if (!try_module_get(mode->owner))
488 mode = NULL;
489 }
490
491 spin_unlock(&mode_list_lock);
492 return mode;
493 }
494
495 static void team_mode_put(const struct team_mode *mode)
496 {
497 module_put(mode->owner);
498 }
499
500 static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
501 {
502 dev_kfree_skb_any(skb);
503 return false;
504 }
505
506 static rx_handler_result_t team_dummy_receive(struct team *team,
507 struct team_port *port,
508 struct sk_buff *skb)
509 {
510 return RX_HANDLER_ANOTHER;
511 }
512
513 static const struct team_mode __team_no_mode = {
514 .kind = "*NOMODE*",
515 };
516
517 static bool team_is_mode_set(struct team *team)
518 {
519 return team->mode != &__team_no_mode;
520 }
521
522 static void team_set_no_mode(struct team *team)
523 {
524 team->user_carrier_enabled = false;
525 team->mode = &__team_no_mode;
526 }
527
528 static void team_adjust_ops(struct team *team)
529 {
530 /*
531 * To avoid checks in rx/tx skb paths, ensure here that non-null and
532 * correct ops are always set.
533 */
534
535 if (!team->en_port_count || !team_is_mode_set(team) ||
536 !team->mode->ops->transmit)
537 team->ops.transmit = team_dummy_transmit;
538 else
539 team->ops.transmit = team->mode->ops->transmit;
540
541 if (!team->en_port_count || !team_is_mode_set(team) ||
542 !team->mode->ops->receive)
543 team->ops.receive = team_dummy_receive;
544 else
545 team->ops.receive = team->mode->ops->receive;
546 }
547
548 /*
549 * We can benefit from the fact that it's ensured no port is present
550 * at the time of mode change. Therefore no packets are in fly so there's no
551 * need to set mode operations in any special way.
552 */
553 static int __team_change_mode(struct team *team,
554 const struct team_mode *new_mode)
555 {
556 /* Check if mode was previously set and do cleanup if so */
557 if (team_is_mode_set(team)) {
558 void (*exit_op)(struct team *team) = team->ops.exit;
559
560 /* Clear ops area so no callback is called any longer */
561 memset(&team->ops, 0, sizeof(struct team_mode_ops));
562 team_adjust_ops(team);
563
564 if (exit_op)
565 exit_op(team);
566 team_mode_put(team->mode);
567 team_set_no_mode(team);
568 /* zero private data area */
569 memset(&team->mode_priv, 0,
570 sizeof(struct team) - offsetof(struct team, mode_priv));
571 }
572
573 if (!new_mode)
574 return 0;
575
576 if (new_mode->ops->init) {
577 int err;
578
579 err = new_mode->ops->init(team);
580 if (err)
581 return err;
582 }
583
584 team->mode = new_mode;
585 memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
586 team_adjust_ops(team);
587
588 return 0;
589 }
590
591 static int team_change_mode(struct team *team, const char *kind)
592 {
593 const struct team_mode *new_mode;
594 struct net_device *dev = team->dev;
595 int err;
596
597 if (!list_empty(&team->port_list)) {
598 netdev_err(dev, "No ports can be present during mode change\n");
599 return -EBUSY;
600 }
601
602 if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) {
603 netdev_err(dev, "Unable to change to the same mode the team is in\n");
604 return -EINVAL;
605 }
606
607 new_mode = team_mode_get(kind);
608 if (!new_mode) {
609 netdev_err(dev, "Mode \"%s\" not found\n", kind);
610 return -EINVAL;
611 }
612
613 err = __team_change_mode(team, new_mode);
614 if (err) {
615 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
616 team_mode_put(new_mode);
617 return err;
618 }
619
620 netdev_info(dev, "Mode changed to \"%s\"\n", kind);
621 return 0;
622 }
623
624
625 /*********************
626 * Peers notification
627 *********************/
628
629 static void team_notify_peers_work(struct work_struct *work)
630 {
631 struct team *team;
632
633 team = container_of(work, struct team, notify_peers.dw.work);
634
635 if (!rtnl_trylock()) {
636 schedule_delayed_work(&team->notify_peers.dw, 0);
637 return;
638 }
639 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, team->dev);
640 rtnl_unlock();
641 if (!atomic_dec_and_test(&team->notify_peers.count_pending))
642 schedule_delayed_work(&team->notify_peers.dw,
643 msecs_to_jiffies(team->notify_peers.interval));
644 }
645
646 static void team_notify_peers(struct team *team)
647 {
648 if (!team->notify_peers.count || !netif_running(team->dev))
649 return;
650 atomic_add(team->notify_peers.count, &team->notify_peers.count_pending);
651 schedule_delayed_work(&team->notify_peers.dw, 0);
652 }
653
654 static void team_notify_peers_init(struct team *team)
655 {
656 INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work);
657 }
658
659 static void team_notify_peers_fini(struct team *team)
660 {
661 cancel_delayed_work_sync(&team->notify_peers.dw);
662 }
663
664
665 /*******************************
666 * Send multicast group rejoins
667 *******************************/
668
669 static void team_mcast_rejoin_work(struct work_struct *work)
670 {
671 struct team *team;
672
673 team = container_of(work, struct team, mcast_rejoin.dw.work);
674
675 if (!rtnl_trylock()) {
676 schedule_delayed_work(&team->mcast_rejoin.dw, 0);
677 return;
678 }
679 call_netdevice_notifiers(NETDEV_RESEND_IGMP, team->dev);
680 rtnl_unlock();
681 if (!atomic_dec_and_test(&team->mcast_rejoin.count_pending))
682 schedule_delayed_work(&team->mcast_rejoin.dw,
683 msecs_to_jiffies(team->mcast_rejoin.interval));
684 }
685
686 static void team_mcast_rejoin(struct team *team)
687 {
688 if (!team->mcast_rejoin.count || !netif_running(team->dev))
689 return;
690 atomic_add(team->mcast_rejoin.count, &team->mcast_rejoin.count_pending);
691 schedule_delayed_work(&team->mcast_rejoin.dw, 0);
692 }
693
694 static void team_mcast_rejoin_init(struct team *team)
695 {
696 INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work);
697 }
698
699 static void team_mcast_rejoin_fini(struct team *team)
700 {
701 cancel_delayed_work_sync(&team->mcast_rejoin.dw);
702 }
703
704
705 /************************
706 * Rx path frame handler
707 ************************/
708
709 /* note: already called with rcu_read_lock */
710 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
711 {
712 struct sk_buff *skb = *pskb;
713 struct team_port *port;
714 struct team *team;
715 rx_handler_result_t res;
716
717 skb = skb_share_check(skb, GFP_ATOMIC);
718 if (!skb)
719 return RX_HANDLER_CONSUMED;
720
721 *pskb = skb;
722
723 port = team_port_get_rcu(skb->dev);
724 team = port->team;
725 if (!team_port_enabled(port)) {
726 /* allow exact match delivery for disabled ports */
727 res = RX_HANDLER_EXACT;
728 } else {
729 res = team->ops.receive(team, port, skb);
730 }
731 if (res == RX_HANDLER_ANOTHER) {
732 struct team_pcpu_stats *pcpu_stats;
733
734 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
735 u64_stats_update_begin(&pcpu_stats->syncp);
736 pcpu_stats->rx_packets++;
737 pcpu_stats->rx_bytes += skb->len;
738 if (skb->pkt_type == PACKET_MULTICAST)
739 pcpu_stats->rx_multicast++;
740 u64_stats_update_end(&pcpu_stats->syncp);
741
742 skb->dev = team->dev;
743 } else {
744 this_cpu_inc(team->pcpu_stats->rx_dropped);
745 }
746
747 return res;
748 }
749
750
751 /*************************************
752 * Multiqueue Tx port select override
753 *************************************/
754
755 static int team_queue_override_init(struct team *team)
756 {
757 struct list_head *listarr;
758 unsigned int queue_cnt = team->dev->num_tx_queues - 1;
759 unsigned int i;
760
761 if (!queue_cnt)
762 return 0;
763 listarr = kmalloc(sizeof(struct list_head) * queue_cnt, GFP_KERNEL);
764 if (!listarr)
765 return -ENOMEM;
766 team->qom_lists = listarr;
767 for (i = 0; i < queue_cnt; i++)
768 INIT_LIST_HEAD(listarr++);
769 return 0;
770 }
771
772 static void team_queue_override_fini(struct team *team)
773 {
774 kfree(team->qom_lists);
775 }
776
777 static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
778 {
779 return &team->qom_lists[queue_id - 1];
780 }
781
782 /*
783 * note: already called with rcu_read_lock
784 */
785 static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
786 {
787 struct list_head *qom_list;
788 struct team_port *port;
789
790 if (!team->queue_override_enabled || !skb->queue_mapping)
791 return false;
792 qom_list = __team_get_qom_list(team, skb->queue_mapping);
793 list_for_each_entry_rcu(port, qom_list, qom_list) {
794 if (!team_dev_queue_xmit(team, port, skb))
795 return true;
796 }
797 return false;
798 }
799
800 static void __team_queue_override_port_del(struct team *team,
801 struct team_port *port)
802 {
803 if (!port->queue_id)
804 return;
805 list_del_rcu(&port->qom_list);
806 }
807
808 static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
809 struct team_port *cur)
810 {
811 if (port->priority < cur->priority)
812 return true;
813 if (port->priority > cur->priority)
814 return false;
815 if (port->index < cur->index)
816 return true;
817 return false;
818 }
819
820 static void __team_queue_override_port_add(struct team *team,
821 struct team_port *port)
822 {
823 struct team_port *cur;
824 struct list_head *qom_list;
825 struct list_head *node;
826
827 if (!port->queue_id)
828 return;
829 qom_list = __team_get_qom_list(team, port->queue_id);
830 node = qom_list;
831 list_for_each_entry(cur, qom_list, qom_list) {
832 if (team_queue_override_port_has_gt_prio_than(port, cur))
833 break;
834 node = &cur->qom_list;
835 }
836 list_add_tail_rcu(&port->qom_list, node);
837 }
838
839 static void __team_queue_override_enabled_check(struct team *team)
840 {
841 struct team_port *port;
842 bool enabled = false;
843
844 list_for_each_entry(port, &team->port_list, list) {
845 if (port->queue_id) {
846 enabled = true;
847 break;
848 }
849 }
850 if (enabled == team->queue_override_enabled)
851 return;
852 netdev_dbg(team->dev, "%s queue override\n",
853 enabled ? "Enabling" : "Disabling");
854 team->queue_override_enabled = enabled;
855 }
856
857 static void team_queue_override_port_prio_changed(struct team *team,
858 struct team_port *port)
859 {
860 if (!port->queue_id || team_port_enabled(port))
861 return;
862 __team_queue_override_port_del(team, port);
863 __team_queue_override_port_add(team, port);
864 __team_queue_override_enabled_check(team);
865 }
866
867 static void team_queue_override_port_change_queue_id(struct team *team,
868 struct team_port *port,
869 u16 new_queue_id)
870 {
871 if (team_port_enabled(port)) {
872 __team_queue_override_port_del(team, port);
873 port->queue_id = new_queue_id;
874 __team_queue_override_port_add(team, port);
875 __team_queue_override_enabled_check(team);
876 } else {
877 port->queue_id = new_queue_id;
878 }
879 }
880
881 static void team_queue_override_port_add(struct team *team,
882 struct team_port *port)
883 {
884 __team_queue_override_port_add(team, port);
885 __team_queue_override_enabled_check(team);
886 }
887
888 static void team_queue_override_port_del(struct team *team,
889 struct team_port *port)
890 {
891 __team_queue_override_port_del(team, port);
892 __team_queue_override_enabled_check(team);
893 }
894
895
896 /****************
897 * Port handling
898 ****************/
899
900 static bool team_port_find(const struct team *team,
901 const struct team_port *port)
902 {
903 struct team_port *cur;
904
905 list_for_each_entry(cur, &team->port_list, list)
906 if (cur == port)
907 return true;
908 return false;
909 }
910
911 /*
912 * Enable/disable port by adding to enabled port hashlist and setting
913 * port->index (Might be racy so reader could see incorrect ifindex when
914 * processing a flying packet, but that is not a problem). Write guarded
915 * by team->lock.
916 */
917 static void team_port_enable(struct team *team,
918 struct team_port *port)
919 {
920 if (team_port_enabled(port))
921 return;
922 port->index = team->en_port_count++;
923 hlist_add_head_rcu(&port->hlist,
924 team_port_index_hash(team, port->index));
925 team_adjust_ops(team);
926 team_queue_override_port_add(team, port);
927 if (team->ops.port_enabled)
928 team->ops.port_enabled(team, port);
929 team_notify_peers(team);
930 team_mcast_rejoin(team);
931 }
932
933 static void __reconstruct_port_hlist(struct team *team, int rm_index)
934 {
935 int i;
936 struct team_port *port;
937
938 for (i = rm_index + 1; i < team->en_port_count; i++) {
939 port = team_get_port_by_index(team, i);
940 hlist_del_rcu(&port->hlist);
941 port->index--;
942 hlist_add_head_rcu(&port->hlist,
943 team_port_index_hash(team, port->index));
944 }
945 }
946
947 static void team_port_disable(struct team *team,
948 struct team_port *port)
949 {
950 if (!team_port_enabled(port))
951 return;
952 if (team->ops.port_disabled)
953 team->ops.port_disabled(team, port);
954 hlist_del_rcu(&port->hlist);
955 __reconstruct_port_hlist(team, port->index);
956 port->index = -1;
957 team->en_port_count--;
958 team_queue_override_port_del(team, port);
959 team_adjust_ops(team);
960 team_notify_peers(team);
961 team_mcast_rejoin(team);
962 }
963
964 #define TEAM_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \
965 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
966 NETIF_F_HIGHDMA | NETIF_F_LRO)
967
968 static void __team_compute_features(struct team *team)
969 {
970 struct team_port *port;
971 u32 vlan_features = TEAM_VLAN_FEATURES & NETIF_F_ALL_FOR_ALL;
972 unsigned short max_hard_header_len = ETH_HLEN;
973 unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE |
974 IFF_XMIT_DST_RELEASE_PERM;
975
976 list_for_each_entry(port, &team->port_list, list) {
977 vlan_features = netdev_increment_features(vlan_features,
978 port->dev->vlan_features,
979 TEAM_VLAN_FEATURES);
980
981 dst_release_flag &= port->dev->priv_flags;
982 if (port->dev->hard_header_len > max_hard_header_len)
983 max_hard_header_len = port->dev->hard_header_len;
984 }
985
986 team->dev->vlan_features = vlan_features;
987 team->dev->hard_header_len = max_hard_header_len;
988
989 team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
990 if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
991 team->dev->priv_flags |= IFF_XMIT_DST_RELEASE;
992
993 netdev_change_features(team->dev);
994 }
995
996 static void team_compute_features(struct team *team)
997 {
998 mutex_lock(&team->lock);
999 __team_compute_features(team);
1000 mutex_unlock(&team->lock);
1001 }
1002
1003 static int team_port_enter(struct team *team, struct team_port *port)
1004 {
1005 int err = 0;
1006
1007 dev_hold(team->dev);
1008 if (team->ops.port_enter) {
1009 err = team->ops.port_enter(team, port);
1010 if (err) {
1011 netdev_err(team->dev, "Device %s failed to enter team mode\n",
1012 port->dev->name);
1013 goto err_port_enter;
1014 }
1015 }
1016
1017 return 0;
1018
1019 err_port_enter:
1020 dev_put(team->dev);
1021
1022 return err;
1023 }
1024
1025 static void team_port_leave(struct team *team, struct team_port *port)
1026 {
1027 if (team->ops.port_leave)
1028 team->ops.port_leave(team, port);
1029 dev_put(team->dev);
1030 }
1031
1032 #ifdef CONFIG_NET_POLL_CONTROLLER
1033 static int team_port_enable_netpoll(struct team *team, struct team_port *port)
1034 {
1035 struct netpoll *np;
1036 int err;
1037
1038 if (!team->dev->npinfo)
1039 return 0;
1040
1041 np = kzalloc(sizeof(*np), GFP_KERNEL);
1042 if (!np)
1043 return -ENOMEM;
1044
1045 err = __netpoll_setup(np, port->dev);
1046 if (err) {
1047 kfree(np);
1048 return err;
1049 }
1050 port->np = np;
1051 return err;
1052 }
1053
1054 static void team_port_disable_netpoll(struct team_port *port)
1055 {
1056 struct netpoll *np = port->np;
1057
1058 if (!np)
1059 return;
1060 port->np = NULL;
1061
1062 /* Wait for transmitting packets to finish before freeing. */
1063 synchronize_rcu_bh();
1064 __netpoll_cleanup(np);
1065 kfree(np);
1066 }
1067 #else
1068 static int team_port_enable_netpoll(struct team *team, struct team_port *port)
1069 {
1070 return 0;
1071 }
1072 static void team_port_disable_netpoll(struct team_port *port)
1073 {
1074 }
1075 #endif
1076
1077 static int team_upper_dev_link(struct net_device *dev,
1078 struct net_device *port_dev)
1079 {
1080 int err;
1081
1082 err = netdev_master_upper_dev_link(port_dev, dev);
1083 if (err)
1084 return err;
1085 port_dev->priv_flags |= IFF_TEAM_PORT;
1086 return 0;
1087 }
1088
1089 static void team_upper_dev_unlink(struct net_device *dev,
1090 struct net_device *port_dev)
1091 {
1092 netdev_upper_dev_unlink(port_dev, dev);
1093 port_dev->priv_flags &= ~IFF_TEAM_PORT;
1094 }
1095
1096 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1097 static int team_dev_type_check_change(struct net_device *dev,
1098 struct net_device *port_dev);
1099
1100 static int team_port_add(struct team *team, struct net_device *port_dev)
1101 {
1102 struct net_device *dev = team->dev;
1103 struct team_port *port;
1104 char *portname = port_dev->name;
1105 int err;
1106
1107 if (port_dev->flags & IFF_LOOPBACK) {
1108 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1109 portname);
1110 return -EINVAL;
1111 }
1112
1113 if (team_port_exists(port_dev)) {
1114 netdev_err(dev, "Device %s is already a port "
1115 "of a team device\n", portname);
1116 return -EBUSY;
1117 }
1118
1119 if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1120 vlan_uses_dev(dev)) {
1121 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1122 portname);
1123 return -EPERM;
1124 }
1125
1126 err = team_dev_type_check_change(dev, port_dev);
1127 if (err)
1128 return err;
1129
1130 if (port_dev->flags & IFF_UP) {
1131 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1132 portname);
1133 return -EBUSY;
1134 }
1135
1136 port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1137 GFP_KERNEL);
1138 if (!port)
1139 return -ENOMEM;
1140
1141 port->dev = port_dev;
1142 port->team = team;
1143 INIT_LIST_HEAD(&port->qom_list);
1144
1145 port->orig.mtu = port_dev->mtu;
1146 err = dev_set_mtu(port_dev, dev->mtu);
1147 if (err) {
1148 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1149 goto err_set_mtu;
1150 }
1151
1152 memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1153
1154 err = team_port_enter(team, port);
1155 if (err) {
1156 netdev_err(dev, "Device %s failed to enter team mode\n",
1157 portname);
1158 goto err_port_enter;
1159 }
1160
1161 err = dev_open(port_dev);
1162 if (err) {
1163 netdev_dbg(dev, "Device %s opening failed\n",
1164 portname);
1165 goto err_dev_open;
1166 }
1167
1168 err = vlan_vids_add_by_dev(port_dev, dev);
1169 if (err) {
1170 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1171 portname);
1172 goto err_vids_add;
1173 }
1174
1175 err = team_port_enable_netpoll(team, port);
1176 if (err) {
1177 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1178 portname);
1179 goto err_enable_netpoll;
1180 }
1181
1182 if (!(dev->features & NETIF_F_LRO))
1183 dev_disable_lro(port_dev);
1184
1185 err = netdev_rx_handler_register(port_dev, team_handle_frame,
1186 port);
1187 if (err) {
1188 netdev_err(dev, "Device %s failed to register rx_handler\n",
1189 portname);
1190 goto err_handler_register;
1191 }
1192
1193 err = team_upper_dev_link(dev, port_dev);
1194 if (err) {
1195 netdev_err(dev, "Device %s failed to set upper link\n",
1196 portname);
1197 goto err_set_upper_link;
1198 }
1199
1200 err = __team_option_inst_add_port(team, port);
1201 if (err) {
1202 netdev_err(dev, "Device %s failed to add per-port options\n",
1203 portname);
1204 goto err_option_port_add;
1205 }
1206
1207 port->index = -1;
1208 list_add_tail_rcu(&port->list, &team->port_list);
1209 team_port_enable(team, port);
1210 __team_compute_features(team);
1211 __team_port_change_port_added(port, !!netif_carrier_ok(port_dev));
1212 __team_options_change_check(team);
1213
1214 netdev_info(dev, "Port device %s added\n", portname);
1215
1216 return 0;
1217
1218 err_option_port_add:
1219 team_upper_dev_unlink(dev, port_dev);
1220
1221 err_set_upper_link:
1222 netdev_rx_handler_unregister(port_dev);
1223
1224 err_handler_register:
1225 team_port_disable_netpoll(port);
1226
1227 err_enable_netpoll:
1228 vlan_vids_del_by_dev(port_dev, dev);
1229
1230 err_vids_add:
1231 dev_close(port_dev);
1232
1233 err_dev_open:
1234 team_port_leave(team, port);
1235 team_port_set_orig_dev_addr(port);
1236
1237 err_port_enter:
1238 dev_set_mtu(port_dev, port->orig.mtu);
1239
1240 err_set_mtu:
1241 kfree(port);
1242
1243 return err;
1244 }
1245
1246 static void __team_port_change_port_removed(struct team_port *port);
1247
1248 static int team_port_del(struct team *team, struct net_device *port_dev)
1249 {
1250 struct net_device *dev = team->dev;
1251 struct team_port *port;
1252 char *portname = port_dev->name;
1253
1254 port = team_port_get_rtnl(port_dev);
1255 if (!port || !team_port_find(team, port)) {
1256 netdev_err(dev, "Device %s does not act as a port of this team\n",
1257 portname);
1258 return -ENOENT;
1259 }
1260
1261 team_port_disable(team, port);
1262 list_del_rcu(&port->list);
1263 team_upper_dev_unlink(dev, port_dev);
1264 netdev_rx_handler_unregister(port_dev);
1265 team_port_disable_netpoll(port);
1266 vlan_vids_del_by_dev(port_dev, dev);
1267 dev_uc_unsync(port_dev, dev);
1268 dev_mc_unsync(port_dev, dev);
1269 dev_close(port_dev);
1270 team_port_leave(team, port);
1271
1272 __team_option_inst_mark_removed_port(team, port);
1273 __team_options_change_check(team);
1274 __team_option_inst_del_port(team, port);
1275 __team_port_change_port_removed(port);
1276
1277 team_port_set_orig_dev_addr(port);
1278 dev_set_mtu(port_dev, port->orig.mtu);
1279 kfree_rcu(port, rcu);
1280 netdev_info(dev, "Port device %s removed\n", portname);
1281 __team_compute_features(team);
1282
1283 return 0;
1284 }
1285
1286
1287 /*****************
1288 * Net device ops
1289 *****************/
1290
1291 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1292 {
1293 ctx->data.str_val = team->mode->kind;
1294 return 0;
1295 }
1296
1297 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1298 {
1299 return team_change_mode(team, ctx->data.str_val);
1300 }
1301
1302 static int team_notify_peers_count_get(struct team *team,
1303 struct team_gsetter_ctx *ctx)
1304 {
1305 ctx->data.u32_val = team->notify_peers.count;
1306 return 0;
1307 }
1308
1309 static int team_notify_peers_count_set(struct team *team,
1310 struct team_gsetter_ctx *ctx)
1311 {
1312 team->notify_peers.count = ctx->data.u32_val;
1313 return 0;
1314 }
1315
1316 static int team_notify_peers_interval_get(struct team *team,
1317 struct team_gsetter_ctx *ctx)
1318 {
1319 ctx->data.u32_val = team->notify_peers.interval;
1320 return 0;
1321 }
1322
1323 static int team_notify_peers_interval_set(struct team *team,
1324 struct team_gsetter_ctx *ctx)
1325 {
1326 team->notify_peers.interval = ctx->data.u32_val;
1327 return 0;
1328 }
1329
1330 static int team_mcast_rejoin_count_get(struct team *team,
1331 struct team_gsetter_ctx *ctx)
1332 {
1333 ctx->data.u32_val = team->mcast_rejoin.count;
1334 return 0;
1335 }
1336
1337 static int team_mcast_rejoin_count_set(struct team *team,
1338 struct team_gsetter_ctx *ctx)
1339 {
1340 team->mcast_rejoin.count = ctx->data.u32_val;
1341 return 0;
1342 }
1343
1344 static int team_mcast_rejoin_interval_get(struct team *team,
1345 struct team_gsetter_ctx *ctx)
1346 {
1347 ctx->data.u32_val = team->mcast_rejoin.interval;
1348 return 0;
1349 }
1350
1351 static int team_mcast_rejoin_interval_set(struct team *team,
1352 struct team_gsetter_ctx *ctx)
1353 {
1354 team->mcast_rejoin.interval = ctx->data.u32_val;
1355 return 0;
1356 }
1357
1358 static int team_port_en_option_get(struct team *team,
1359 struct team_gsetter_ctx *ctx)
1360 {
1361 struct team_port *port = ctx->info->port;
1362
1363 ctx->data.bool_val = team_port_enabled(port);
1364 return 0;
1365 }
1366
1367 static int team_port_en_option_set(struct team *team,
1368 struct team_gsetter_ctx *ctx)
1369 {
1370 struct team_port *port = ctx->info->port;
1371
1372 if (ctx->data.bool_val)
1373 team_port_enable(team, port);
1374 else
1375 team_port_disable(team, port);
1376 return 0;
1377 }
1378
1379 static int team_user_linkup_option_get(struct team *team,
1380 struct team_gsetter_ctx *ctx)
1381 {
1382 struct team_port *port = ctx->info->port;
1383
1384 ctx->data.bool_val = port->user.linkup;
1385 return 0;
1386 }
1387
1388 static void __team_carrier_check(struct team *team);
1389
1390 static int team_user_linkup_option_set(struct team *team,
1391 struct team_gsetter_ctx *ctx)
1392 {
1393 struct team_port *port = ctx->info->port;
1394
1395 port->user.linkup = ctx->data.bool_val;
1396 team_refresh_port_linkup(port);
1397 __team_carrier_check(port->team);
1398 return 0;
1399 }
1400
1401 static int team_user_linkup_en_option_get(struct team *team,
1402 struct team_gsetter_ctx *ctx)
1403 {
1404 struct team_port *port = ctx->info->port;
1405
1406 ctx->data.bool_val = port->user.linkup_enabled;
1407 return 0;
1408 }
1409
1410 static int team_user_linkup_en_option_set(struct team *team,
1411 struct team_gsetter_ctx *ctx)
1412 {
1413 struct team_port *port = ctx->info->port;
1414
1415 port->user.linkup_enabled = ctx->data.bool_val;
1416 team_refresh_port_linkup(port);
1417 __team_carrier_check(port->team);
1418 return 0;
1419 }
1420
1421 static int team_priority_option_get(struct team *team,
1422 struct team_gsetter_ctx *ctx)
1423 {
1424 struct team_port *port = ctx->info->port;
1425
1426 ctx->data.s32_val = port->priority;
1427 return 0;
1428 }
1429
1430 static int team_priority_option_set(struct team *team,
1431 struct team_gsetter_ctx *ctx)
1432 {
1433 struct team_port *port = ctx->info->port;
1434 s32 priority = ctx->data.s32_val;
1435
1436 if (port->priority == priority)
1437 return 0;
1438 port->priority = priority;
1439 team_queue_override_port_prio_changed(team, port);
1440 return 0;
1441 }
1442
1443 static int team_queue_id_option_get(struct team *team,
1444 struct team_gsetter_ctx *ctx)
1445 {
1446 struct team_port *port = ctx->info->port;
1447
1448 ctx->data.u32_val = port->queue_id;
1449 return 0;
1450 }
1451
1452 static int team_queue_id_option_set(struct team *team,
1453 struct team_gsetter_ctx *ctx)
1454 {
1455 struct team_port *port = ctx->info->port;
1456 u16 new_queue_id = ctx->data.u32_val;
1457
1458 if (port->queue_id == new_queue_id)
1459 return 0;
1460 if (new_queue_id >= team->dev->real_num_tx_queues)
1461 return -EINVAL;
1462 team_queue_override_port_change_queue_id(team, port, new_queue_id);
1463 return 0;
1464 }
1465
1466 static const struct team_option team_options[] = {
1467 {
1468 .name = "mode",
1469 .type = TEAM_OPTION_TYPE_STRING,
1470 .getter = team_mode_option_get,
1471 .setter = team_mode_option_set,
1472 },
1473 {
1474 .name = "notify_peers_count",
1475 .type = TEAM_OPTION_TYPE_U32,
1476 .getter = team_notify_peers_count_get,
1477 .setter = team_notify_peers_count_set,
1478 },
1479 {
1480 .name = "notify_peers_interval",
1481 .type = TEAM_OPTION_TYPE_U32,
1482 .getter = team_notify_peers_interval_get,
1483 .setter = team_notify_peers_interval_set,
1484 },
1485 {
1486 .name = "mcast_rejoin_count",
1487 .type = TEAM_OPTION_TYPE_U32,
1488 .getter = team_mcast_rejoin_count_get,
1489 .setter = team_mcast_rejoin_count_set,
1490 },
1491 {
1492 .name = "mcast_rejoin_interval",
1493 .type = TEAM_OPTION_TYPE_U32,
1494 .getter = team_mcast_rejoin_interval_get,
1495 .setter = team_mcast_rejoin_interval_set,
1496 },
1497 {
1498 .name = "enabled",
1499 .type = TEAM_OPTION_TYPE_BOOL,
1500 .per_port = true,
1501 .getter = team_port_en_option_get,
1502 .setter = team_port_en_option_set,
1503 },
1504 {
1505 .name = "user_linkup",
1506 .type = TEAM_OPTION_TYPE_BOOL,
1507 .per_port = true,
1508 .getter = team_user_linkup_option_get,
1509 .setter = team_user_linkup_option_set,
1510 },
1511 {
1512 .name = "user_linkup_enabled",
1513 .type = TEAM_OPTION_TYPE_BOOL,
1514 .per_port = true,
1515 .getter = team_user_linkup_en_option_get,
1516 .setter = team_user_linkup_en_option_set,
1517 },
1518 {
1519 .name = "priority",
1520 .type = TEAM_OPTION_TYPE_S32,
1521 .per_port = true,
1522 .getter = team_priority_option_get,
1523 .setter = team_priority_option_set,
1524 },
1525 {
1526 .name = "queue_id",
1527 .type = TEAM_OPTION_TYPE_U32,
1528 .per_port = true,
1529 .getter = team_queue_id_option_get,
1530 .setter = team_queue_id_option_set,
1531 },
1532 };
1533
1534 static struct lock_class_key team_netdev_xmit_lock_key;
1535 static struct lock_class_key team_netdev_addr_lock_key;
1536 static struct lock_class_key team_tx_busylock_key;
1537
1538 static void team_set_lockdep_class_one(struct net_device *dev,
1539 struct netdev_queue *txq,
1540 void *unused)
1541 {
1542 lockdep_set_class(&txq->_xmit_lock, &team_netdev_xmit_lock_key);
1543 }
1544
1545 static void team_set_lockdep_class(struct net_device *dev)
1546 {
1547 lockdep_set_class(&dev->addr_list_lock, &team_netdev_addr_lock_key);
1548 netdev_for_each_tx_queue(dev, team_set_lockdep_class_one, NULL);
1549 dev->qdisc_tx_busylock = &team_tx_busylock_key;
1550 }
1551
1552 static int team_init(struct net_device *dev)
1553 {
1554 struct team *team = netdev_priv(dev);
1555 int i;
1556 int err;
1557
1558 team->dev = dev;
1559 mutex_init(&team->lock);
1560 team_set_no_mode(team);
1561
1562 team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1563 if (!team->pcpu_stats)
1564 return -ENOMEM;
1565
1566 for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1567 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1568 INIT_LIST_HEAD(&team->port_list);
1569 err = team_queue_override_init(team);
1570 if (err)
1571 goto err_team_queue_override_init;
1572
1573 team_adjust_ops(team);
1574
1575 INIT_LIST_HEAD(&team->option_list);
1576 INIT_LIST_HEAD(&team->option_inst_list);
1577
1578 team_notify_peers_init(team);
1579 team_mcast_rejoin_init(team);
1580
1581 err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1582 if (err)
1583 goto err_options_register;
1584 netif_carrier_off(dev);
1585
1586 team_set_lockdep_class(dev);
1587
1588 return 0;
1589
1590 err_options_register:
1591 team_mcast_rejoin_fini(team);
1592 team_notify_peers_fini(team);
1593 team_queue_override_fini(team);
1594 err_team_queue_override_init:
1595 free_percpu(team->pcpu_stats);
1596
1597 return err;
1598 }
1599
1600 static void team_uninit(struct net_device *dev)
1601 {
1602 struct team *team = netdev_priv(dev);
1603 struct team_port *port;
1604 struct team_port *tmp;
1605
1606 mutex_lock(&team->lock);
1607 list_for_each_entry_safe(port, tmp, &team->port_list, list)
1608 team_port_del(team, port->dev);
1609
1610 __team_change_mode(team, NULL); /* cleanup */
1611 __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1612 team_mcast_rejoin_fini(team);
1613 team_notify_peers_fini(team);
1614 team_queue_override_fini(team);
1615 mutex_unlock(&team->lock);
1616 }
1617
1618 static void team_destructor(struct net_device *dev)
1619 {
1620 struct team *team = netdev_priv(dev);
1621
1622 free_percpu(team->pcpu_stats);
1623 free_netdev(dev);
1624 }
1625
1626 static int team_open(struct net_device *dev)
1627 {
1628 return 0;
1629 }
1630
1631 static int team_close(struct net_device *dev)
1632 {
1633 return 0;
1634 }
1635
1636 /*
1637 * note: already called with rcu_read_lock
1638 */
1639 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1640 {
1641 struct team *team = netdev_priv(dev);
1642 bool tx_success;
1643 unsigned int len = skb->len;
1644
1645 tx_success = team_queue_override_transmit(team, skb);
1646 if (!tx_success)
1647 tx_success = team->ops.transmit(team, skb);
1648 if (tx_success) {
1649 struct team_pcpu_stats *pcpu_stats;
1650
1651 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1652 u64_stats_update_begin(&pcpu_stats->syncp);
1653 pcpu_stats->tx_packets++;
1654 pcpu_stats->tx_bytes += len;
1655 u64_stats_update_end(&pcpu_stats->syncp);
1656 } else {
1657 this_cpu_inc(team->pcpu_stats->tx_dropped);
1658 }
1659
1660 return NETDEV_TX_OK;
1661 }
1662
1663 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1664 void *accel_priv, select_queue_fallback_t fallback)
1665 {
1666 /*
1667 * This helper function exists to help dev_pick_tx get the correct
1668 * destination queue. Using a helper function skips a call to
1669 * skb_tx_hash and will put the skbs in the queue we expect on their
1670 * way down to the team driver.
1671 */
1672 u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1673
1674 /*
1675 * Save the original txq to restore before passing to the driver
1676 */
1677 qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1678
1679 if (unlikely(txq >= dev->real_num_tx_queues)) {
1680 do {
1681 txq -= dev->real_num_tx_queues;
1682 } while (txq >= dev->real_num_tx_queues);
1683 }
1684 return txq;
1685 }
1686
1687 static void team_change_rx_flags(struct net_device *dev, int change)
1688 {
1689 struct team *team = netdev_priv(dev);
1690 struct team_port *port;
1691 int inc;
1692
1693 rcu_read_lock();
1694 list_for_each_entry_rcu(port, &team->port_list, list) {
1695 if (change & IFF_PROMISC) {
1696 inc = dev->flags & IFF_PROMISC ? 1 : -1;
1697 dev_set_promiscuity(port->dev, inc);
1698 }
1699 if (change & IFF_ALLMULTI) {
1700 inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1701 dev_set_allmulti(port->dev, inc);
1702 }
1703 }
1704 rcu_read_unlock();
1705 }
1706
1707 static void team_set_rx_mode(struct net_device *dev)
1708 {
1709 struct team *team = netdev_priv(dev);
1710 struct team_port *port;
1711
1712 rcu_read_lock();
1713 list_for_each_entry_rcu(port, &team->port_list, list) {
1714 dev_uc_sync_multiple(port->dev, dev);
1715 dev_mc_sync_multiple(port->dev, dev);
1716 }
1717 rcu_read_unlock();
1718 }
1719
1720 static int team_set_mac_address(struct net_device *dev, void *p)
1721 {
1722 struct sockaddr *addr = p;
1723 struct team *team = netdev_priv(dev);
1724 struct team_port *port;
1725
1726 if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1727 return -EADDRNOTAVAIL;
1728 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1729 rcu_read_lock();
1730 list_for_each_entry_rcu(port, &team->port_list, list)
1731 if (team->ops.port_change_dev_addr)
1732 team->ops.port_change_dev_addr(team, port);
1733 rcu_read_unlock();
1734 return 0;
1735 }
1736
1737 static int team_change_mtu(struct net_device *dev, int new_mtu)
1738 {
1739 struct team *team = netdev_priv(dev);
1740 struct team_port *port;
1741 int err;
1742
1743 /*
1744 * Alhough this is reader, it's guarded by team lock. It's not possible
1745 * to traverse list in reverse under rcu_read_lock
1746 */
1747 mutex_lock(&team->lock);
1748 team->port_mtu_change_allowed = true;
1749 list_for_each_entry(port, &team->port_list, list) {
1750 err = dev_set_mtu(port->dev, new_mtu);
1751 if (err) {
1752 netdev_err(dev, "Device %s failed to change mtu",
1753 port->dev->name);
1754 goto unwind;
1755 }
1756 }
1757 team->port_mtu_change_allowed = false;
1758 mutex_unlock(&team->lock);
1759
1760 dev->mtu = new_mtu;
1761
1762 return 0;
1763
1764 unwind:
1765 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1766 dev_set_mtu(port->dev, dev->mtu);
1767 team->port_mtu_change_allowed = false;
1768 mutex_unlock(&team->lock);
1769
1770 return err;
1771 }
1772
1773 static struct rtnl_link_stats64 *
1774 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1775 {
1776 struct team *team = netdev_priv(dev);
1777 struct team_pcpu_stats *p;
1778 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1779 u32 rx_dropped = 0, tx_dropped = 0;
1780 unsigned int start;
1781 int i;
1782
1783 for_each_possible_cpu(i) {
1784 p = per_cpu_ptr(team->pcpu_stats, i);
1785 do {
1786 start = u64_stats_fetch_begin_irq(&p->syncp);
1787 rx_packets = p->rx_packets;
1788 rx_bytes = p->rx_bytes;
1789 rx_multicast = p->rx_multicast;
1790 tx_packets = p->tx_packets;
1791 tx_bytes = p->tx_bytes;
1792 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
1793
1794 stats->rx_packets += rx_packets;
1795 stats->rx_bytes += rx_bytes;
1796 stats->multicast += rx_multicast;
1797 stats->tx_packets += tx_packets;
1798 stats->tx_bytes += tx_bytes;
1799 /*
1800 * rx_dropped & tx_dropped are u32, updated
1801 * without syncp protection.
1802 */
1803 rx_dropped += p->rx_dropped;
1804 tx_dropped += p->tx_dropped;
1805 }
1806 stats->rx_dropped = rx_dropped;
1807 stats->tx_dropped = tx_dropped;
1808 return stats;
1809 }
1810
1811 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1812 {
1813 struct team *team = netdev_priv(dev);
1814 struct team_port *port;
1815 int err;
1816
1817 /*
1818 * Alhough this is reader, it's guarded by team lock. It's not possible
1819 * to traverse list in reverse under rcu_read_lock
1820 */
1821 mutex_lock(&team->lock);
1822 list_for_each_entry(port, &team->port_list, list) {
1823 err = vlan_vid_add(port->dev, proto, vid);
1824 if (err)
1825 goto unwind;
1826 }
1827 mutex_unlock(&team->lock);
1828
1829 return 0;
1830
1831 unwind:
1832 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1833 vlan_vid_del(port->dev, proto, vid);
1834 mutex_unlock(&team->lock);
1835
1836 return err;
1837 }
1838
1839 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1840 {
1841 struct team *team = netdev_priv(dev);
1842 struct team_port *port;
1843
1844 rcu_read_lock();
1845 list_for_each_entry_rcu(port, &team->port_list, list)
1846 vlan_vid_del(port->dev, proto, vid);
1847 rcu_read_unlock();
1848
1849 return 0;
1850 }
1851
1852 #ifdef CONFIG_NET_POLL_CONTROLLER
1853 static void team_poll_controller(struct net_device *dev)
1854 {
1855 }
1856
1857 static void __team_netpoll_cleanup(struct team *team)
1858 {
1859 struct team_port *port;
1860
1861 list_for_each_entry(port, &team->port_list, list)
1862 team_port_disable_netpoll(port);
1863 }
1864
1865 static void team_netpoll_cleanup(struct net_device *dev)
1866 {
1867 struct team *team = netdev_priv(dev);
1868
1869 mutex_lock(&team->lock);
1870 __team_netpoll_cleanup(team);
1871 mutex_unlock(&team->lock);
1872 }
1873
1874 static int team_netpoll_setup(struct net_device *dev,
1875 struct netpoll_info *npifo)
1876 {
1877 struct team *team = netdev_priv(dev);
1878 struct team_port *port;
1879 int err = 0;
1880
1881 mutex_lock(&team->lock);
1882 list_for_each_entry(port, &team->port_list, list) {
1883 err = team_port_enable_netpoll(team, port);
1884 if (err) {
1885 __team_netpoll_cleanup(team);
1886 break;
1887 }
1888 }
1889 mutex_unlock(&team->lock);
1890 return err;
1891 }
1892 #endif
1893
1894 static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
1895 {
1896 struct team *team = netdev_priv(dev);
1897 int err;
1898
1899 mutex_lock(&team->lock);
1900 err = team_port_add(team, port_dev);
1901 mutex_unlock(&team->lock);
1902 return err;
1903 }
1904
1905 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1906 {
1907 struct team *team = netdev_priv(dev);
1908 int err;
1909
1910 mutex_lock(&team->lock);
1911 err = team_port_del(team, port_dev);
1912 mutex_unlock(&team->lock);
1913 return err;
1914 }
1915
1916 static netdev_features_t team_fix_features(struct net_device *dev,
1917 netdev_features_t features)
1918 {
1919 struct team_port *port;
1920 struct team *team = netdev_priv(dev);
1921 netdev_features_t mask;
1922
1923 mask = features;
1924 features &= ~NETIF_F_ONE_FOR_ALL;
1925 features |= NETIF_F_ALL_FOR_ALL;
1926
1927 rcu_read_lock();
1928 list_for_each_entry_rcu(port, &team->port_list, list) {
1929 features = netdev_increment_features(features,
1930 port->dev->features,
1931 mask);
1932 }
1933 rcu_read_unlock();
1934 return features;
1935 }
1936
1937 static int team_change_carrier(struct net_device *dev, bool new_carrier)
1938 {
1939 struct team *team = netdev_priv(dev);
1940
1941 team->user_carrier_enabled = true;
1942
1943 if (new_carrier)
1944 netif_carrier_on(dev);
1945 else
1946 netif_carrier_off(dev);
1947 return 0;
1948 }
1949
1950 static const struct net_device_ops team_netdev_ops = {
1951 .ndo_init = team_init,
1952 .ndo_uninit = team_uninit,
1953 .ndo_open = team_open,
1954 .ndo_stop = team_close,
1955 .ndo_start_xmit = team_xmit,
1956 .ndo_select_queue = team_select_queue,
1957 .ndo_change_rx_flags = team_change_rx_flags,
1958 .ndo_set_rx_mode = team_set_rx_mode,
1959 .ndo_set_mac_address = team_set_mac_address,
1960 .ndo_change_mtu = team_change_mtu,
1961 .ndo_get_stats64 = team_get_stats64,
1962 .ndo_vlan_rx_add_vid = team_vlan_rx_add_vid,
1963 .ndo_vlan_rx_kill_vid = team_vlan_rx_kill_vid,
1964 #ifdef CONFIG_NET_POLL_CONTROLLER
1965 .ndo_poll_controller = team_poll_controller,
1966 .ndo_netpoll_setup = team_netpoll_setup,
1967 .ndo_netpoll_cleanup = team_netpoll_cleanup,
1968 #endif
1969 .ndo_add_slave = team_add_slave,
1970 .ndo_del_slave = team_del_slave,
1971 .ndo_fix_features = team_fix_features,
1972 .ndo_change_carrier = team_change_carrier,
1973 };
1974
1975 /***********************
1976 * ethtool interface
1977 ***********************/
1978
1979 static void team_ethtool_get_drvinfo(struct net_device *dev,
1980 struct ethtool_drvinfo *drvinfo)
1981 {
1982 strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
1983 strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
1984 }
1985
1986 static const struct ethtool_ops team_ethtool_ops = {
1987 .get_drvinfo = team_ethtool_get_drvinfo,
1988 .get_link = ethtool_op_get_link,
1989 };
1990
1991 /***********************
1992 * rt netlink interface
1993 ***********************/
1994
1995 static void team_setup_by_port(struct net_device *dev,
1996 struct net_device *port_dev)
1997 {
1998 dev->header_ops = port_dev->header_ops;
1999 dev->type = port_dev->type;
2000 dev->hard_header_len = port_dev->hard_header_len;
2001 dev->addr_len = port_dev->addr_len;
2002 dev->mtu = port_dev->mtu;
2003 memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2004 eth_hw_addr_inherit(dev, port_dev);
2005 }
2006
2007 static int team_dev_type_check_change(struct net_device *dev,
2008 struct net_device *port_dev)
2009 {
2010 struct team *team = netdev_priv(dev);
2011 char *portname = port_dev->name;
2012 int err;
2013
2014 if (dev->type == port_dev->type)
2015 return 0;
2016 if (!list_empty(&team->port_list)) {
2017 netdev_err(dev, "Device %s is of different type\n", portname);
2018 return -EBUSY;
2019 }
2020 err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2021 err = notifier_to_errno(err);
2022 if (err) {
2023 netdev_err(dev, "Refused to change device type\n");
2024 return err;
2025 }
2026 dev_uc_flush(dev);
2027 dev_mc_flush(dev);
2028 team_setup_by_port(dev, port_dev);
2029 call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2030 return 0;
2031 }
2032
2033 static void team_setup(struct net_device *dev)
2034 {
2035 ether_setup(dev);
2036
2037 dev->netdev_ops = &team_netdev_ops;
2038 dev->ethtool_ops = &team_ethtool_ops;
2039 dev->destructor = team_destructor;
2040 dev->tx_queue_len = 0;
2041 dev->flags |= IFF_MULTICAST;
2042 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2043
2044 /*
2045 * Indicate we support unicast address filtering. That way core won't
2046 * bring us to promisc mode in case a unicast addr is added.
2047 * Let this up to underlay drivers.
2048 */
2049 dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2050
2051 dev->features |= NETIF_F_LLTX;
2052 dev->features |= NETIF_F_GRO;
2053
2054 /* Don't allow team devices to change network namespaces. */
2055 dev->features |= NETIF_F_NETNS_LOCAL;
2056
2057 dev->hw_features = TEAM_VLAN_FEATURES |
2058 NETIF_F_HW_VLAN_CTAG_TX |
2059 NETIF_F_HW_VLAN_CTAG_RX |
2060 NETIF_F_HW_VLAN_CTAG_FILTER;
2061
2062 dev->hw_features &= ~(NETIF_F_ALL_CSUM & ~NETIF_F_HW_CSUM);
2063 dev->features |= dev->hw_features;
2064 }
2065
2066 static int team_newlink(struct net *src_net, struct net_device *dev,
2067 struct nlattr *tb[], struct nlattr *data[])
2068 {
2069 if (tb[IFLA_ADDRESS] == NULL)
2070 eth_hw_addr_random(dev);
2071
2072 return register_netdevice(dev);
2073 }
2074
2075 static int team_validate(struct nlattr *tb[], struct nlattr *data[])
2076 {
2077 if (tb[IFLA_ADDRESS]) {
2078 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2079 return -EINVAL;
2080 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2081 return -EADDRNOTAVAIL;
2082 }
2083 return 0;
2084 }
2085
2086 static unsigned int team_get_num_tx_queues(void)
2087 {
2088 return TEAM_DEFAULT_NUM_TX_QUEUES;
2089 }
2090
2091 static unsigned int team_get_num_rx_queues(void)
2092 {
2093 return TEAM_DEFAULT_NUM_RX_QUEUES;
2094 }
2095
2096 static struct rtnl_link_ops team_link_ops __read_mostly = {
2097 .kind = DRV_NAME,
2098 .priv_size = sizeof(struct team),
2099 .setup = team_setup,
2100 .newlink = team_newlink,
2101 .validate = team_validate,
2102 .get_num_tx_queues = team_get_num_tx_queues,
2103 .get_num_rx_queues = team_get_num_rx_queues,
2104 };
2105
2106
2107 /***********************************
2108 * Generic netlink custom interface
2109 ***********************************/
2110
2111 static struct genl_family team_nl_family = {
2112 .id = GENL_ID_GENERATE,
2113 .name = TEAM_GENL_NAME,
2114 .version = TEAM_GENL_VERSION,
2115 .maxattr = TEAM_ATTR_MAX,
2116 .netnsok = true,
2117 };
2118
2119 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2120 [TEAM_ATTR_UNSPEC] = { .type = NLA_UNSPEC, },
2121 [TEAM_ATTR_TEAM_IFINDEX] = { .type = NLA_U32 },
2122 [TEAM_ATTR_LIST_OPTION] = { .type = NLA_NESTED },
2123 [TEAM_ATTR_LIST_PORT] = { .type = NLA_NESTED },
2124 };
2125
2126 static const struct nla_policy
2127 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2128 [TEAM_ATTR_OPTION_UNSPEC] = { .type = NLA_UNSPEC, },
2129 [TEAM_ATTR_OPTION_NAME] = {
2130 .type = NLA_STRING,
2131 .len = TEAM_STRING_MAX_LEN,
2132 },
2133 [TEAM_ATTR_OPTION_CHANGED] = { .type = NLA_FLAG },
2134 [TEAM_ATTR_OPTION_TYPE] = { .type = NLA_U8 },
2135 [TEAM_ATTR_OPTION_DATA] = { .type = NLA_BINARY },
2136 };
2137
2138 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2139 {
2140 struct sk_buff *msg;
2141 void *hdr;
2142 int err;
2143
2144 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2145 if (!msg)
2146 return -ENOMEM;
2147
2148 hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2149 &team_nl_family, 0, TEAM_CMD_NOOP);
2150 if (!hdr) {
2151 err = -EMSGSIZE;
2152 goto err_msg_put;
2153 }
2154
2155 genlmsg_end(msg, hdr);
2156
2157 return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2158
2159 err_msg_put:
2160 nlmsg_free(msg);
2161
2162 return err;
2163 }
2164
2165 /*
2166 * Netlink cmd functions should be locked by following two functions.
2167 * Since dev gets held here, that ensures dev won't disappear in between.
2168 */
2169 static struct team *team_nl_team_get(struct genl_info *info)
2170 {
2171 struct net *net = genl_info_net(info);
2172 int ifindex;
2173 struct net_device *dev;
2174 struct team *team;
2175
2176 if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2177 return NULL;
2178
2179 ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2180 dev = dev_get_by_index(net, ifindex);
2181 if (!dev || dev->netdev_ops != &team_netdev_ops) {
2182 if (dev)
2183 dev_put(dev);
2184 return NULL;
2185 }
2186
2187 team = netdev_priv(dev);
2188 mutex_lock(&team->lock);
2189 return team;
2190 }
2191
2192 static void team_nl_team_put(struct team *team)
2193 {
2194 mutex_unlock(&team->lock);
2195 dev_put(team->dev);
2196 }
2197
2198 typedef int team_nl_send_func_t(struct sk_buff *skb,
2199 struct team *team, u32 portid);
2200
2201 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2202 {
2203 return genlmsg_unicast(dev_net(team->dev), skb, portid);
2204 }
2205
2206 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2207 struct team_option_inst *opt_inst)
2208 {
2209 struct nlattr *option_item;
2210 struct team_option *option = opt_inst->option;
2211 struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2212 struct team_gsetter_ctx ctx;
2213 int err;
2214
2215 ctx.info = opt_inst_info;
2216 err = team_option_get(team, opt_inst, &ctx);
2217 if (err)
2218 return err;
2219
2220 option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
2221 if (!option_item)
2222 return -EMSGSIZE;
2223
2224 if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2225 goto nest_cancel;
2226 if (opt_inst_info->port &&
2227 nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2228 opt_inst_info->port->dev->ifindex))
2229 goto nest_cancel;
2230 if (opt_inst->option->array_size &&
2231 nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2232 opt_inst_info->array_index))
2233 goto nest_cancel;
2234
2235 switch (option->type) {
2236 case TEAM_OPTION_TYPE_U32:
2237 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2238 goto nest_cancel;
2239 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2240 goto nest_cancel;
2241 break;
2242 case TEAM_OPTION_TYPE_STRING:
2243 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2244 goto nest_cancel;
2245 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2246 ctx.data.str_val))
2247 goto nest_cancel;
2248 break;
2249 case TEAM_OPTION_TYPE_BINARY:
2250 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2251 goto nest_cancel;
2252 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2253 ctx.data.bin_val.ptr))
2254 goto nest_cancel;
2255 break;
2256 case TEAM_OPTION_TYPE_BOOL:
2257 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2258 goto nest_cancel;
2259 if (ctx.data.bool_val &&
2260 nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2261 goto nest_cancel;
2262 break;
2263 case TEAM_OPTION_TYPE_S32:
2264 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2265 goto nest_cancel;
2266 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2267 goto nest_cancel;
2268 break;
2269 default:
2270 BUG();
2271 }
2272 if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2273 goto nest_cancel;
2274 if (opt_inst->changed) {
2275 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2276 goto nest_cancel;
2277 opt_inst->changed = false;
2278 }
2279 nla_nest_end(skb, option_item);
2280 return 0;
2281
2282 nest_cancel:
2283 nla_nest_cancel(skb, option_item);
2284 return -EMSGSIZE;
2285 }
2286
2287 static int __send_and_alloc_skb(struct sk_buff **pskb,
2288 struct team *team, u32 portid,
2289 team_nl_send_func_t *send_func)
2290 {
2291 int err;
2292
2293 if (*pskb) {
2294 err = send_func(*pskb, team, portid);
2295 if (err)
2296 return err;
2297 }
2298 *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2299 if (!*pskb)
2300 return -ENOMEM;
2301 return 0;
2302 }
2303
2304 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2305 int flags, team_nl_send_func_t *send_func,
2306 struct list_head *sel_opt_inst_list)
2307 {
2308 struct nlattr *option_list;
2309 struct nlmsghdr *nlh;
2310 void *hdr;
2311 struct team_option_inst *opt_inst;
2312 int err;
2313 struct sk_buff *skb = NULL;
2314 bool incomplete;
2315 int i;
2316
2317 opt_inst = list_first_entry(sel_opt_inst_list,
2318 struct team_option_inst, tmp_list);
2319
2320 start_again:
2321 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2322 if (err)
2323 return err;
2324
2325 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2326 TEAM_CMD_OPTIONS_GET);
2327 if (!hdr)
2328 return -EMSGSIZE;
2329
2330 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2331 goto nla_put_failure;
2332 option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2333 if (!option_list)
2334 goto nla_put_failure;
2335
2336 i = 0;
2337 incomplete = false;
2338 list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2339 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2340 if (err) {
2341 if (err == -EMSGSIZE) {
2342 if (!i)
2343 goto errout;
2344 incomplete = true;
2345 break;
2346 }
2347 goto errout;
2348 }
2349 i++;
2350 }
2351
2352 nla_nest_end(skb, option_list);
2353 genlmsg_end(skb, hdr);
2354 if (incomplete)
2355 goto start_again;
2356
2357 send_done:
2358 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2359 if (!nlh) {
2360 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2361 if (err)
2362 goto errout;
2363 goto send_done;
2364 }
2365
2366 return send_func(skb, team, portid);
2367
2368 nla_put_failure:
2369 err = -EMSGSIZE;
2370 errout:
2371 genlmsg_cancel(skb, hdr);
2372 nlmsg_free(skb);
2373 return err;
2374 }
2375
2376 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2377 {
2378 struct team *team;
2379 struct team_option_inst *opt_inst;
2380 int err;
2381 LIST_HEAD(sel_opt_inst_list);
2382
2383 team = team_nl_team_get(info);
2384 if (!team)
2385 return -EINVAL;
2386
2387 list_for_each_entry(opt_inst, &team->option_inst_list, list)
2388 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2389 err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2390 NLM_F_ACK, team_nl_send_unicast,
2391 &sel_opt_inst_list);
2392
2393 team_nl_team_put(team);
2394
2395 return err;
2396 }
2397
2398 static int team_nl_send_event_options_get(struct team *team,
2399 struct list_head *sel_opt_inst_list);
2400
2401 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2402 {
2403 struct team *team;
2404 int err = 0;
2405 int i;
2406 struct nlattr *nl_option;
2407 LIST_HEAD(opt_inst_list);
2408
2409 team = team_nl_team_get(info);
2410 if (!team)
2411 return -EINVAL;
2412
2413 err = -EINVAL;
2414 if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2415 err = -EINVAL;
2416 goto team_put;
2417 }
2418
2419 nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2420 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2421 struct nlattr *attr;
2422 struct nlattr *attr_data;
2423 enum team_option_type opt_type;
2424 int opt_port_ifindex = 0; /* != 0 for per-port options */
2425 u32 opt_array_index = 0;
2426 bool opt_is_array = false;
2427 struct team_option_inst *opt_inst;
2428 char *opt_name;
2429 bool opt_found = false;
2430
2431 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2432 err = -EINVAL;
2433 goto team_put;
2434 }
2435 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2436 nl_option, team_nl_option_policy);
2437 if (err)
2438 goto team_put;
2439 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2440 !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2441 err = -EINVAL;
2442 goto team_put;
2443 }
2444 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2445 case NLA_U32:
2446 opt_type = TEAM_OPTION_TYPE_U32;
2447 break;
2448 case NLA_STRING:
2449 opt_type = TEAM_OPTION_TYPE_STRING;
2450 break;
2451 case NLA_BINARY:
2452 opt_type = TEAM_OPTION_TYPE_BINARY;
2453 break;
2454 case NLA_FLAG:
2455 opt_type = TEAM_OPTION_TYPE_BOOL;
2456 break;
2457 case NLA_S32:
2458 opt_type = TEAM_OPTION_TYPE_S32;
2459 break;
2460 default:
2461 goto team_put;
2462 }
2463
2464 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2465 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2466 err = -EINVAL;
2467 goto team_put;
2468 }
2469
2470 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2471 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2472 if (attr)
2473 opt_port_ifindex = nla_get_u32(attr);
2474
2475 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2476 if (attr) {
2477 opt_is_array = true;
2478 opt_array_index = nla_get_u32(attr);
2479 }
2480
2481 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2482 struct team_option *option = opt_inst->option;
2483 struct team_gsetter_ctx ctx;
2484 struct team_option_inst_info *opt_inst_info;
2485 int tmp_ifindex;
2486
2487 opt_inst_info = &opt_inst->info;
2488 tmp_ifindex = opt_inst_info->port ?
2489 opt_inst_info->port->dev->ifindex : 0;
2490 if (option->type != opt_type ||
2491 strcmp(option->name, opt_name) ||
2492 tmp_ifindex != opt_port_ifindex ||
2493 (option->array_size && !opt_is_array) ||
2494 opt_inst_info->array_index != opt_array_index)
2495 continue;
2496 opt_found = true;
2497 ctx.info = opt_inst_info;
2498 switch (opt_type) {
2499 case TEAM_OPTION_TYPE_U32:
2500 ctx.data.u32_val = nla_get_u32(attr_data);
2501 break;
2502 case TEAM_OPTION_TYPE_STRING:
2503 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2504 err = -EINVAL;
2505 goto team_put;
2506 }
2507 ctx.data.str_val = nla_data(attr_data);
2508 break;
2509 case TEAM_OPTION_TYPE_BINARY:
2510 ctx.data.bin_val.len = nla_len(attr_data);
2511 ctx.data.bin_val.ptr = nla_data(attr_data);
2512 break;
2513 case TEAM_OPTION_TYPE_BOOL:
2514 ctx.data.bool_val = attr_data ? true : false;
2515 break;
2516 case TEAM_OPTION_TYPE_S32:
2517 ctx.data.s32_val = nla_get_s32(attr_data);
2518 break;
2519 default:
2520 BUG();
2521 }
2522 err = team_option_set(team, opt_inst, &ctx);
2523 if (err)
2524 goto team_put;
2525 opt_inst->changed = true;
2526 list_add(&opt_inst->tmp_list, &opt_inst_list);
2527 }
2528 if (!opt_found) {
2529 err = -ENOENT;
2530 goto team_put;
2531 }
2532 }
2533
2534 err = team_nl_send_event_options_get(team, &opt_inst_list);
2535
2536 team_put:
2537 team_nl_team_put(team);
2538
2539 return err;
2540 }
2541
2542 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2543 struct team_port *port)
2544 {
2545 struct nlattr *port_item;
2546
2547 port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2548 if (!port_item)
2549 goto nest_cancel;
2550 if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2551 goto nest_cancel;
2552 if (port->changed) {
2553 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2554 goto nest_cancel;
2555 port->changed = false;
2556 }
2557 if ((port->removed &&
2558 nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2559 (port->state.linkup &&
2560 nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2561 nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2562 nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2563 goto nest_cancel;
2564 nla_nest_end(skb, port_item);
2565 return 0;
2566
2567 nest_cancel:
2568 nla_nest_cancel(skb, port_item);
2569 return -EMSGSIZE;
2570 }
2571
2572 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2573 int flags, team_nl_send_func_t *send_func,
2574 struct team_port *one_port)
2575 {
2576 struct nlattr *port_list;
2577 struct nlmsghdr *nlh;
2578 void *hdr;
2579 struct team_port *port;
2580 int err;
2581 struct sk_buff *skb = NULL;
2582 bool incomplete;
2583 int i;
2584
2585 port = list_first_entry_or_null(&team->port_list,
2586 struct team_port, list);
2587
2588 start_again:
2589 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2590 if (err)
2591 return err;
2592
2593 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2594 TEAM_CMD_PORT_LIST_GET);
2595 if (!hdr)
2596 return -EMSGSIZE;
2597
2598 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2599 goto nla_put_failure;
2600 port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2601 if (!port_list)
2602 goto nla_put_failure;
2603
2604 i = 0;
2605 incomplete = false;
2606
2607 /* If one port is selected, called wants to send port list containing
2608 * only this port. Otherwise go through all listed ports and send all
2609 */
2610 if (one_port) {
2611 err = team_nl_fill_one_port_get(skb, one_port);
2612 if (err)
2613 goto errout;
2614 } else if (port) {
2615 list_for_each_entry_from(port, &team->port_list, list) {
2616 err = team_nl_fill_one_port_get(skb, port);
2617 if (err) {
2618 if (err == -EMSGSIZE) {
2619 if (!i)
2620 goto errout;
2621 incomplete = true;
2622 break;
2623 }
2624 goto errout;
2625 }
2626 i++;
2627 }
2628 }
2629
2630 nla_nest_end(skb, port_list);
2631 genlmsg_end(skb, hdr);
2632 if (incomplete)
2633 goto start_again;
2634
2635 send_done:
2636 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2637 if (!nlh) {
2638 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2639 if (err)
2640 goto errout;
2641 goto send_done;
2642 }
2643
2644 return send_func(skb, team, portid);
2645
2646 nla_put_failure:
2647 err = -EMSGSIZE;
2648 errout:
2649 genlmsg_cancel(skb, hdr);
2650 nlmsg_free(skb);
2651 return err;
2652 }
2653
2654 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2655 struct genl_info *info)
2656 {
2657 struct team *team;
2658 int err;
2659
2660 team = team_nl_team_get(info);
2661 if (!team)
2662 return -EINVAL;
2663
2664 err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2665 NLM_F_ACK, team_nl_send_unicast, NULL);
2666
2667 team_nl_team_put(team);
2668
2669 return err;
2670 }
2671
2672 static const struct genl_ops team_nl_ops[] = {
2673 {
2674 .cmd = TEAM_CMD_NOOP,
2675 .doit = team_nl_cmd_noop,
2676 .policy = team_nl_policy,
2677 },
2678 {
2679 .cmd = TEAM_CMD_OPTIONS_SET,
2680 .doit = team_nl_cmd_options_set,
2681 .policy = team_nl_policy,
2682 .flags = GENL_ADMIN_PERM,
2683 },
2684 {
2685 .cmd = TEAM_CMD_OPTIONS_GET,
2686 .doit = team_nl_cmd_options_get,
2687 .policy = team_nl_policy,
2688 .flags = GENL_ADMIN_PERM,
2689 },
2690 {
2691 .cmd = TEAM_CMD_PORT_LIST_GET,
2692 .doit = team_nl_cmd_port_list_get,
2693 .policy = team_nl_policy,
2694 .flags = GENL_ADMIN_PERM,
2695 },
2696 };
2697
2698 static const struct genl_multicast_group team_nl_mcgrps[] = {
2699 { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2700 };
2701
2702 static int team_nl_send_multicast(struct sk_buff *skb,
2703 struct team *team, u32 portid)
2704 {
2705 return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2706 skb, 0, 0, GFP_KERNEL);
2707 }
2708
2709 static int team_nl_send_event_options_get(struct team *team,
2710 struct list_head *sel_opt_inst_list)
2711 {
2712 return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2713 sel_opt_inst_list);
2714 }
2715
2716 static int team_nl_send_event_port_get(struct team *team,
2717 struct team_port *port)
2718 {
2719 return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2720 port);
2721 }
2722
2723 static int team_nl_init(void)
2724 {
2725 return genl_register_family_with_ops_groups(&team_nl_family, team_nl_ops,
2726 team_nl_mcgrps);
2727 }
2728
2729 static void team_nl_fini(void)
2730 {
2731 genl_unregister_family(&team_nl_family);
2732 }
2733
2734
2735 /******************
2736 * Change checkers
2737 ******************/
2738
2739 static void __team_options_change_check(struct team *team)
2740 {
2741 int err;
2742 struct team_option_inst *opt_inst;
2743 LIST_HEAD(sel_opt_inst_list);
2744
2745 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2746 if (opt_inst->changed)
2747 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2748 }
2749 err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2750 if (err && err != -ESRCH)
2751 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2752 err);
2753 }
2754
2755 /* rtnl lock is held */
2756
2757 static void __team_port_change_send(struct team_port *port, bool linkup)
2758 {
2759 int err;
2760
2761 port->changed = true;
2762 port->state.linkup = linkup;
2763 team_refresh_port_linkup(port);
2764 if (linkup) {
2765 struct ethtool_cmd ecmd;
2766
2767 err = __ethtool_get_settings(port->dev, &ecmd);
2768 if (!err) {
2769 port->state.speed = ethtool_cmd_speed(&ecmd);
2770 port->state.duplex = ecmd.duplex;
2771 goto send_event;
2772 }
2773 }
2774 port->state.speed = 0;
2775 port->state.duplex = 0;
2776
2777 send_event:
2778 err = team_nl_send_event_port_get(port->team, port);
2779 if (err && err != -ESRCH)
2780 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2781 port->dev->name, err);
2782
2783 }
2784
2785 static void __team_carrier_check(struct team *team)
2786 {
2787 struct team_port *port;
2788 bool team_linkup;
2789
2790 if (team->user_carrier_enabled)
2791 return;
2792
2793 team_linkup = false;
2794 list_for_each_entry(port, &team->port_list, list) {
2795 if (port->linkup) {
2796 team_linkup = true;
2797 break;
2798 }
2799 }
2800
2801 if (team_linkup)
2802 netif_carrier_on(team->dev);
2803 else
2804 netif_carrier_off(team->dev);
2805 }
2806
2807 static void __team_port_change_check(struct team_port *port, bool linkup)
2808 {
2809 if (port->state.linkup != linkup)
2810 __team_port_change_send(port, linkup);
2811 __team_carrier_check(port->team);
2812 }
2813
2814 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2815 {
2816 __team_port_change_send(port, linkup);
2817 __team_carrier_check(port->team);
2818 }
2819
2820 static void __team_port_change_port_removed(struct team_port *port)
2821 {
2822 port->removed = true;
2823 __team_port_change_send(port, false);
2824 __team_carrier_check(port->team);
2825 }
2826
2827 static void team_port_change_check(struct team_port *port, bool linkup)
2828 {
2829 struct team *team = port->team;
2830
2831 mutex_lock(&team->lock);
2832 __team_port_change_check(port, linkup);
2833 mutex_unlock(&team->lock);
2834 }
2835
2836
2837 /************************************
2838 * Net device notifier event handler
2839 ************************************/
2840
2841 static int team_device_event(struct notifier_block *unused,
2842 unsigned long event, void *ptr)
2843 {
2844 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2845 struct team_port *port;
2846
2847 port = team_port_get_rtnl(dev);
2848 if (!port)
2849 return NOTIFY_DONE;
2850
2851 switch (event) {
2852 case NETDEV_UP:
2853 if (netif_carrier_ok(dev))
2854 team_port_change_check(port, true);
2855 break;
2856 case NETDEV_DOWN:
2857 team_port_change_check(port, false);
2858 break;
2859 case NETDEV_CHANGE:
2860 if (netif_running(port->dev))
2861 team_port_change_check(port,
2862 !!netif_carrier_ok(port->dev));
2863 break;
2864 case NETDEV_UNREGISTER:
2865 team_del_slave(port->team->dev, dev);
2866 break;
2867 case NETDEV_FEAT_CHANGE:
2868 team_compute_features(port->team);
2869 break;
2870 case NETDEV_PRECHANGEMTU:
2871 /* Forbid to change mtu of underlaying device */
2872 if (!port->team->port_mtu_change_allowed)
2873 return NOTIFY_BAD;
2874 break;
2875 case NETDEV_PRE_TYPE_CHANGE:
2876 /* Forbid to change type of underlaying device */
2877 return NOTIFY_BAD;
2878 case NETDEV_RESEND_IGMP:
2879 /* Propagate to master device */
2880 call_netdevice_notifiers(event, port->team->dev);
2881 break;
2882 }
2883 return NOTIFY_DONE;
2884 }
2885
2886 static struct notifier_block team_notifier_block __read_mostly = {
2887 .notifier_call = team_device_event,
2888 };
2889
2890
2891 /***********************
2892 * Module init and exit
2893 ***********************/
2894
2895 static int __init team_module_init(void)
2896 {
2897 int err;
2898
2899 register_netdevice_notifier(&team_notifier_block);
2900
2901 err = rtnl_link_register(&team_link_ops);
2902 if (err)
2903 goto err_rtnl_reg;
2904
2905 err = team_nl_init();
2906 if (err)
2907 goto err_nl_init;
2908
2909 return 0;
2910
2911 err_nl_init:
2912 rtnl_link_unregister(&team_link_ops);
2913
2914 err_rtnl_reg:
2915 unregister_netdevice_notifier(&team_notifier_block);
2916
2917 return err;
2918 }
2919
2920 static void __exit team_module_exit(void)
2921 {
2922 team_nl_fini();
2923 rtnl_link_unregister(&team_link_ops);
2924 unregister_netdevice_notifier(&team_notifier_block);
2925 }
2926
2927 module_init(team_module_init);
2928 module_exit(team_module_exit);
2929
2930 MODULE_LICENSE("GPL v2");
2931 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
2932 MODULE_DESCRIPTION("Ethernet team device driver");
2933 MODULE_ALIAS_RTNL_LINK(DRV_NAME);
Linux with added FPC-III support