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team: forbid incorrect fall-through in notifier
[mirror_ubuntu-artful-kernel.git] / drivers / net / team / team.c
1 /*
2 * drivers/net/team/team.c - Network team device driver
3 * Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 */
10
11 #include <linux/kernel.h>
12 #include <linux/types.h>
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/slab.h>
16 #include <linux/rcupdate.h>
17 #include <linux/errno.h>
18 #include <linux/ctype.h>
19 #include <linux/notifier.h>
20 #include <linux/netdevice.h>
21 #include <linux/netpoll.h>
22 #include <linux/if_vlan.h>
23 #include <linux/if_arp.h>
24 #include <linux/socket.h>
25 #include <linux/etherdevice.h>
26 #include <linux/rtnetlink.h>
27 #include <net/rtnetlink.h>
28 #include <net/genetlink.h>
29 #include <net/netlink.h>
30 #include <net/sch_generic.h>
31 #include <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_set(&team->notify_peers.count_pending, team->notify_peers.count);
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_set(&team->mcast_rejoin.count_pending, team->mcast_rejoin.count);
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;
972 unsigned short max_hard_header_len = ETH_HLEN;
973 unsigned int flags, dst_release_flag = IFF_XMIT_DST_RELEASE;
974
975 list_for_each_entry(port, &team->port_list, list) {
976 vlan_features = netdev_increment_features(vlan_features,
977 port->dev->vlan_features,
978 TEAM_VLAN_FEATURES);
979
980 dst_release_flag &= port->dev->priv_flags;
981 if (port->dev->hard_header_len > max_hard_header_len)
982 max_hard_header_len = port->dev->hard_header_len;
983 }
984
985 team->dev->vlan_features = vlan_features;
986 team->dev->hard_header_len = max_hard_header_len;
987
988 flags = team->dev->priv_flags & ~IFF_XMIT_DST_RELEASE;
989 team->dev->priv_flags = flags | dst_release_flag;
990
991 netdev_change_features(team->dev);
992 }
993
994 static void team_compute_features(struct team *team)
995 {
996 mutex_lock(&team->lock);
997 __team_compute_features(team);
998 mutex_unlock(&team->lock);
999 }
1000
1001 static int team_port_enter(struct team *team, struct team_port *port)
1002 {
1003 int err = 0;
1004
1005 dev_hold(team->dev);
1006 port->dev->priv_flags |= IFF_TEAM_PORT;
1007 if (team->ops.port_enter) {
1008 err = team->ops.port_enter(team, port);
1009 if (err) {
1010 netdev_err(team->dev, "Device %s failed to enter team mode\n",
1011 port->dev->name);
1012 goto err_port_enter;
1013 }
1014 }
1015
1016 return 0;
1017
1018 err_port_enter:
1019 port->dev->priv_flags &= ~IFF_TEAM_PORT;
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 port->dev->priv_flags &= ~IFF_TEAM_PORT;
1030 dev_put(team->dev);
1031 }
1032
1033 #ifdef CONFIG_NET_POLL_CONTROLLER
1034 static int team_port_enable_netpoll(struct team *team, struct team_port *port)
1035 {
1036 struct netpoll *np;
1037 int err;
1038
1039 if (!team->dev->npinfo)
1040 return 0;
1041
1042 np = kzalloc(sizeof(*np), GFP_KERNEL);
1043 if (!np)
1044 return -ENOMEM;
1045
1046 err = __netpoll_setup(np, port->dev);
1047 if (err) {
1048 kfree(np);
1049 return err;
1050 }
1051 port->np = np;
1052 return err;
1053 }
1054
1055 static void team_port_disable_netpoll(struct team_port *port)
1056 {
1057 struct netpoll *np = port->np;
1058
1059 if (!np)
1060 return;
1061 port->np = NULL;
1062
1063 /* Wait for transmitting packets to finish before freeing. */
1064 synchronize_rcu_bh();
1065 __netpoll_cleanup(np);
1066 kfree(np);
1067 }
1068 #else
1069 static int team_port_enable_netpoll(struct team *team, struct team_port *port)
1070 {
1071 return 0;
1072 }
1073 static void team_port_disable_netpoll(struct team_port *port)
1074 {
1075 }
1076 #endif
1077
1078 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1079 static int team_dev_type_check_change(struct net_device *dev,
1080 struct net_device *port_dev);
1081
1082 static int team_port_add(struct team *team, struct net_device *port_dev)
1083 {
1084 struct net_device *dev = team->dev;
1085 struct team_port *port;
1086 char *portname = port_dev->name;
1087 int err;
1088
1089 if (port_dev->flags & IFF_LOOPBACK) {
1090 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1091 portname);
1092 return -EINVAL;
1093 }
1094
1095 if (team_port_exists(port_dev)) {
1096 netdev_err(dev, "Device %s is already a port "
1097 "of a team device\n", portname);
1098 return -EBUSY;
1099 }
1100
1101 if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1102 vlan_uses_dev(dev)) {
1103 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1104 portname);
1105 return -EPERM;
1106 }
1107
1108 err = team_dev_type_check_change(dev, port_dev);
1109 if (err)
1110 return err;
1111
1112 if (port_dev->flags & IFF_UP) {
1113 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1114 portname);
1115 return -EBUSY;
1116 }
1117
1118 port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1119 GFP_KERNEL);
1120 if (!port)
1121 return -ENOMEM;
1122
1123 port->dev = port_dev;
1124 port->team = team;
1125 INIT_LIST_HEAD(&port->qom_list);
1126
1127 port->orig.mtu = port_dev->mtu;
1128 err = dev_set_mtu(port_dev, dev->mtu);
1129 if (err) {
1130 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1131 goto err_set_mtu;
1132 }
1133
1134 memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1135
1136 err = team_port_enter(team, port);
1137 if (err) {
1138 netdev_err(dev, "Device %s failed to enter team mode\n",
1139 portname);
1140 goto err_port_enter;
1141 }
1142
1143 err = dev_open(port_dev);
1144 if (err) {
1145 netdev_dbg(dev, "Device %s opening failed\n",
1146 portname);
1147 goto err_dev_open;
1148 }
1149
1150 err = vlan_vids_add_by_dev(port_dev, dev);
1151 if (err) {
1152 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1153 portname);
1154 goto err_vids_add;
1155 }
1156
1157 err = team_port_enable_netpoll(team, port);
1158 if (err) {
1159 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1160 portname);
1161 goto err_enable_netpoll;
1162 }
1163
1164 err = netdev_master_upper_dev_link(port_dev, dev);
1165 if (err) {
1166 netdev_err(dev, "Device %s failed to set upper link\n",
1167 portname);
1168 goto err_set_upper_link;
1169 }
1170
1171 err = netdev_rx_handler_register(port_dev, team_handle_frame,
1172 port);
1173 if (err) {
1174 netdev_err(dev, "Device %s failed to register rx_handler\n",
1175 portname);
1176 goto err_handler_register;
1177 }
1178
1179 err = __team_option_inst_add_port(team, port);
1180 if (err) {
1181 netdev_err(dev, "Device %s failed to add per-port options\n",
1182 portname);
1183 goto err_option_port_add;
1184 }
1185
1186 port->index = -1;
1187 list_add_tail_rcu(&port->list, &team->port_list);
1188 team_port_enable(team, port);
1189 __team_compute_features(team);
1190 __team_port_change_port_added(port, !!netif_carrier_ok(port_dev));
1191 __team_options_change_check(team);
1192
1193 netdev_info(dev, "Port device %s added\n", portname);
1194
1195 return 0;
1196
1197 err_option_port_add:
1198 netdev_rx_handler_unregister(port_dev);
1199
1200 err_handler_register:
1201 netdev_upper_dev_unlink(port_dev, dev);
1202
1203 err_set_upper_link:
1204 team_port_disable_netpoll(port);
1205
1206 err_enable_netpoll:
1207 vlan_vids_del_by_dev(port_dev, dev);
1208
1209 err_vids_add:
1210 dev_close(port_dev);
1211
1212 err_dev_open:
1213 team_port_leave(team, port);
1214 team_port_set_orig_dev_addr(port);
1215
1216 err_port_enter:
1217 dev_set_mtu(port_dev, port->orig.mtu);
1218
1219 err_set_mtu:
1220 kfree(port);
1221
1222 return err;
1223 }
1224
1225 static void __team_port_change_port_removed(struct team_port *port);
1226
1227 static int team_port_del(struct team *team, struct net_device *port_dev)
1228 {
1229 struct net_device *dev = team->dev;
1230 struct team_port *port;
1231 char *portname = port_dev->name;
1232
1233 port = team_port_get_rtnl(port_dev);
1234 if (!port || !team_port_find(team, port)) {
1235 netdev_err(dev, "Device %s does not act as a port of this team\n",
1236 portname);
1237 return -ENOENT;
1238 }
1239
1240 team_port_disable(team, port);
1241 list_del_rcu(&port->list);
1242 netdev_rx_handler_unregister(port_dev);
1243 netdev_upper_dev_unlink(port_dev, dev);
1244 team_port_disable_netpoll(port);
1245 vlan_vids_del_by_dev(port_dev, dev);
1246 dev_uc_unsync(port_dev, dev);
1247 dev_mc_unsync(port_dev, dev);
1248 dev_close(port_dev);
1249 team_port_leave(team, port);
1250
1251 __team_option_inst_mark_removed_port(team, port);
1252 __team_options_change_check(team);
1253 __team_option_inst_del_port(team, port);
1254 __team_port_change_port_removed(port);
1255
1256 team_port_set_orig_dev_addr(port);
1257 dev_set_mtu(port_dev, port->orig.mtu);
1258 kfree_rcu(port, rcu);
1259 netdev_info(dev, "Port device %s removed\n", portname);
1260 __team_compute_features(team);
1261
1262 return 0;
1263 }
1264
1265
1266 /*****************
1267 * Net device ops
1268 *****************/
1269
1270 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1271 {
1272 ctx->data.str_val = team->mode->kind;
1273 return 0;
1274 }
1275
1276 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1277 {
1278 return team_change_mode(team, ctx->data.str_val);
1279 }
1280
1281 static int team_notify_peers_count_get(struct team *team,
1282 struct team_gsetter_ctx *ctx)
1283 {
1284 ctx->data.u32_val = team->notify_peers.count;
1285 return 0;
1286 }
1287
1288 static int team_notify_peers_count_set(struct team *team,
1289 struct team_gsetter_ctx *ctx)
1290 {
1291 team->notify_peers.count = ctx->data.u32_val;
1292 return 0;
1293 }
1294
1295 static int team_notify_peers_interval_get(struct team *team,
1296 struct team_gsetter_ctx *ctx)
1297 {
1298 ctx->data.u32_val = team->notify_peers.interval;
1299 return 0;
1300 }
1301
1302 static int team_notify_peers_interval_set(struct team *team,
1303 struct team_gsetter_ctx *ctx)
1304 {
1305 team->notify_peers.interval = ctx->data.u32_val;
1306 return 0;
1307 }
1308
1309 static int team_mcast_rejoin_count_get(struct team *team,
1310 struct team_gsetter_ctx *ctx)
1311 {
1312 ctx->data.u32_val = team->mcast_rejoin.count;
1313 return 0;
1314 }
1315
1316 static int team_mcast_rejoin_count_set(struct team *team,
1317 struct team_gsetter_ctx *ctx)
1318 {
1319 team->mcast_rejoin.count = ctx->data.u32_val;
1320 return 0;
1321 }
1322
1323 static int team_mcast_rejoin_interval_get(struct team *team,
1324 struct team_gsetter_ctx *ctx)
1325 {
1326 ctx->data.u32_val = team->mcast_rejoin.interval;
1327 return 0;
1328 }
1329
1330 static int team_mcast_rejoin_interval_set(struct team *team,
1331 struct team_gsetter_ctx *ctx)
1332 {
1333 team->mcast_rejoin.interval = ctx->data.u32_val;
1334 return 0;
1335 }
1336
1337 static int team_port_en_option_get(struct team *team,
1338 struct team_gsetter_ctx *ctx)
1339 {
1340 struct team_port *port = ctx->info->port;
1341
1342 ctx->data.bool_val = team_port_enabled(port);
1343 return 0;
1344 }
1345
1346 static int team_port_en_option_set(struct team *team,
1347 struct team_gsetter_ctx *ctx)
1348 {
1349 struct team_port *port = ctx->info->port;
1350
1351 if (ctx->data.bool_val)
1352 team_port_enable(team, port);
1353 else
1354 team_port_disable(team, port);
1355 return 0;
1356 }
1357
1358 static int team_user_linkup_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 = port->user.linkup;
1364 return 0;
1365 }
1366
1367 static void __team_carrier_check(struct team *team);
1368
1369 static int team_user_linkup_option_set(struct team *team,
1370 struct team_gsetter_ctx *ctx)
1371 {
1372 struct team_port *port = ctx->info->port;
1373
1374 port->user.linkup = ctx->data.bool_val;
1375 team_refresh_port_linkup(port);
1376 __team_carrier_check(port->team);
1377 return 0;
1378 }
1379
1380 static int team_user_linkup_en_option_get(struct team *team,
1381 struct team_gsetter_ctx *ctx)
1382 {
1383 struct team_port *port = ctx->info->port;
1384
1385 ctx->data.bool_val = port->user.linkup_enabled;
1386 return 0;
1387 }
1388
1389 static int team_user_linkup_en_option_set(struct team *team,
1390 struct team_gsetter_ctx *ctx)
1391 {
1392 struct team_port *port = ctx->info->port;
1393
1394 port->user.linkup_enabled = ctx->data.bool_val;
1395 team_refresh_port_linkup(port);
1396 __team_carrier_check(port->team);
1397 return 0;
1398 }
1399
1400 static int team_priority_option_get(struct team *team,
1401 struct team_gsetter_ctx *ctx)
1402 {
1403 struct team_port *port = ctx->info->port;
1404
1405 ctx->data.s32_val = port->priority;
1406 return 0;
1407 }
1408
1409 static int team_priority_option_set(struct team *team,
1410 struct team_gsetter_ctx *ctx)
1411 {
1412 struct team_port *port = ctx->info->port;
1413 s32 priority = ctx->data.s32_val;
1414
1415 if (port->priority == priority)
1416 return 0;
1417 port->priority = priority;
1418 team_queue_override_port_prio_changed(team, port);
1419 return 0;
1420 }
1421
1422 static int team_queue_id_option_get(struct team *team,
1423 struct team_gsetter_ctx *ctx)
1424 {
1425 struct team_port *port = ctx->info->port;
1426
1427 ctx->data.u32_val = port->queue_id;
1428 return 0;
1429 }
1430
1431 static int team_queue_id_option_set(struct team *team,
1432 struct team_gsetter_ctx *ctx)
1433 {
1434 struct team_port *port = ctx->info->port;
1435 u16 new_queue_id = ctx->data.u32_val;
1436
1437 if (port->queue_id == new_queue_id)
1438 return 0;
1439 if (new_queue_id >= team->dev->real_num_tx_queues)
1440 return -EINVAL;
1441 team_queue_override_port_change_queue_id(team, port, new_queue_id);
1442 return 0;
1443 }
1444
1445 static const struct team_option team_options[] = {
1446 {
1447 .name = "mode",
1448 .type = TEAM_OPTION_TYPE_STRING,
1449 .getter = team_mode_option_get,
1450 .setter = team_mode_option_set,
1451 },
1452 {
1453 .name = "notify_peers_count",
1454 .type = TEAM_OPTION_TYPE_U32,
1455 .getter = team_notify_peers_count_get,
1456 .setter = team_notify_peers_count_set,
1457 },
1458 {
1459 .name = "notify_peers_interval",
1460 .type = TEAM_OPTION_TYPE_U32,
1461 .getter = team_notify_peers_interval_get,
1462 .setter = team_notify_peers_interval_set,
1463 },
1464 {
1465 .name = "mcast_rejoin_count",
1466 .type = TEAM_OPTION_TYPE_U32,
1467 .getter = team_mcast_rejoin_count_get,
1468 .setter = team_mcast_rejoin_count_set,
1469 },
1470 {
1471 .name = "mcast_rejoin_interval",
1472 .type = TEAM_OPTION_TYPE_U32,
1473 .getter = team_mcast_rejoin_interval_get,
1474 .setter = team_mcast_rejoin_interval_set,
1475 },
1476 {
1477 .name = "enabled",
1478 .type = TEAM_OPTION_TYPE_BOOL,
1479 .per_port = true,
1480 .getter = team_port_en_option_get,
1481 .setter = team_port_en_option_set,
1482 },
1483 {
1484 .name = "user_linkup",
1485 .type = TEAM_OPTION_TYPE_BOOL,
1486 .per_port = true,
1487 .getter = team_user_linkup_option_get,
1488 .setter = team_user_linkup_option_set,
1489 },
1490 {
1491 .name = "user_linkup_enabled",
1492 .type = TEAM_OPTION_TYPE_BOOL,
1493 .per_port = true,
1494 .getter = team_user_linkup_en_option_get,
1495 .setter = team_user_linkup_en_option_set,
1496 },
1497 {
1498 .name = "priority",
1499 .type = TEAM_OPTION_TYPE_S32,
1500 .per_port = true,
1501 .getter = team_priority_option_get,
1502 .setter = team_priority_option_set,
1503 },
1504 {
1505 .name = "queue_id",
1506 .type = TEAM_OPTION_TYPE_U32,
1507 .per_port = true,
1508 .getter = team_queue_id_option_get,
1509 .setter = team_queue_id_option_set,
1510 },
1511 };
1512
1513 static struct lock_class_key team_netdev_xmit_lock_key;
1514 static struct lock_class_key team_netdev_addr_lock_key;
1515 static struct lock_class_key team_tx_busylock_key;
1516
1517 static void team_set_lockdep_class_one(struct net_device *dev,
1518 struct netdev_queue *txq,
1519 void *unused)
1520 {
1521 lockdep_set_class(&txq->_xmit_lock, &team_netdev_xmit_lock_key);
1522 }
1523
1524 static void team_set_lockdep_class(struct net_device *dev)
1525 {
1526 lockdep_set_class(&dev->addr_list_lock, &team_netdev_addr_lock_key);
1527 netdev_for_each_tx_queue(dev, team_set_lockdep_class_one, NULL);
1528 dev->qdisc_tx_busylock = &team_tx_busylock_key;
1529 }
1530
1531 static int team_init(struct net_device *dev)
1532 {
1533 struct team *team = netdev_priv(dev);
1534 int i;
1535 int err;
1536
1537 team->dev = dev;
1538 mutex_init(&team->lock);
1539 team_set_no_mode(team);
1540
1541 team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1542 if (!team->pcpu_stats)
1543 return -ENOMEM;
1544
1545 for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1546 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1547 INIT_LIST_HEAD(&team->port_list);
1548 err = team_queue_override_init(team);
1549 if (err)
1550 goto err_team_queue_override_init;
1551
1552 team_adjust_ops(team);
1553
1554 INIT_LIST_HEAD(&team->option_list);
1555 INIT_LIST_HEAD(&team->option_inst_list);
1556
1557 team_notify_peers_init(team);
1558 team_mcast_rejoin_init(team);
1559
1560 err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1561 if (err)
1562 goto err_options_register;
1563 netif_carrier_off(dev);
1564
1565 team_set_lockdep_class(dev);
1566
1567 return 0;
1568
1569 err_options_register:
1570 team_mcast_rejoin_fini(team);
1571 team_notify_peers_fini(team);
1572 team_queue_override_fini(team);
1573 err_team_queue_override_init:
1574 free_percpu(team->pcpu_stats);
1575
1576 return err;
1577 }
1578
1579 static void team_uninit(struct net_device *dev)
1580 {
1581 struct team *team = netdev_priv(dev);
1582 struct team_port *port;
1583 struct team_port *tmp;
1584
1585 mutex_lock(&team->lock);
1586 list_for_each_entry_safe(port, tmp, &team->port_list, list)
1587 team_port_del(team, port->dev);
1588
1589 __team_change_mode(team, NULL); /* cleanup */
1590 __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1591 team_mcast_rejoin_fini(team);
1592 team_notify_peers_fini(team);
1593 team_queue_override_fini(team);
1594 mutex_unlock(&team->lock);
1595 }
1596
1597 static void team_destructor(struct net_device *dev)
1598 {
1599 struct team *team = netdev_priv(dev);
1600
1601 free_percpu(team->pcpu_stats);
1602 free_netdev(dev);
1603 }
1604
1605 static int team_open(struct net_device *dev)
1606 {
1607 return 0;
1608 }
1609
1610 static int team_close(struct net_device *dev)
1611 {
1612 return 0;
1613 }
1614
1615 /*
1616 * note: already called with rcu_read_lock
1617 */
1618 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1619 {
1620 struct team *team = netdev_priv(dev);
1621 bool tx_success;
1622 unsigned int len = skb->len;
1623
1624 tx_success = team_queue_override_transmit(team, skb);
1625 if (!tx_success)
1626 tx_success = team->ops.transmit(team, skb);
1627 if (tx_success) {
1628 struct team_pcpu_stats *pcpu_stats;
1629
1630 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1631 u64_stats_update_begin(&pcpu_stats->syncp);
1632 pcpu_stats->tx_packets++;
1633 pcpu_stats->tx_bytes += len;
1634 u64_stats_update_end(&pcpu_stats->syncp);
1635 } else {
1636 this_cpu_inc(team->pcpu_stats->tx_dropped);
1637 }
1638
1639 return NETDEV_TX_OK;
1640 }
1641
1642 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1643 void *accel_priv, select_queue_fallback_t fallback)
1644 {
1645 /*
1646 * This helper function exists to help dev_pick_tx get the correct
1647 * destination queue. Using a helper function skips a call to
1648 * skb_tx_hash and will put the skbs in the queue we expect on their
1649 * way down to the team driver.
1650 */
1651 u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1652
1653 /*
1654 * Save the original txq to restore before passing to the driver
1655 */
1656 qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1657
1658 if (unlikely(txq >= dev->real_num_tx_queues)) {
1659 do {
1660 txq -= dev->real_num_tx_queues;
1661 } while (txq >= dev->real_num_tx_queues);
1662 }
1663 return txq;
1664 }
1665
1666 static void team_change_rx_flags(struct net_device *dev, int change)
1667 {
1668 struct team *team = netdev_priv(dev);
1669 struct team_port *port;
1670 int inc;
1671
1672 rcu_read_lock();
1673 list_for_each_entry_rcu(port, &team->port_list, list) {
1674 if (change & IFF_PROMISC) {
1675 inc = dev->flags & IFF_PROMISC ? 1 : -1;
1676 dev_set_promiscuity(port->dev, inc);
1677 }
1678 if (change & IFF_ALLMULTI) {
1679 inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1680 dev_set_allmulti(port->dev, inc);
1681 }
1682 }
1683 rcu_read_unlock();
1684 }
1685
1686 static void team_set_rx_mode(struct net_device *dev)
1687 {
1688 struct team *team = netdev_priv(dev);
1689 struct team_port *port;
1690
1691 rcu_read_lock();
1692 list_for_each_entry_rcu(port, &team->port_list, list) {
1693 dev_uc_sync_multiple(port->dev, dev);
1694 dev_mc_sync_multiple(port->dev, dev);
1695 }
1696 rcu_read_unlock();
1697 }
1698
1699 static int team_set_mac_address(struct net_device *dev, void *p)
1700 {
1701 struct sockaddr *addr = p;
1702 struct team *team = netdev_priv(dev);
1703 struct team_port *port;
1704
1705 if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1706 return -EADDRNOTAVAIL;
1707 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1708 rcu_read_lock();
1709 list_for_each_entry_rcu(port, &team->port_list, list)
1710 if (team->ops.port_change_dev_addr)
1711 team->ops.port_change_dev_addr(team, port);
1712 rcu_read_unlock();
1713 return 0;
1714 }
1715
1716 static int team_change_mtu(struct net_device *dev, int new_mtu)
1717 {
1718 struct team *team = netdev_priv(dev);
1719 struct team_port *port;
1720 int err;
1721
1722 /*
1723 * Alhough this is reader, it's guarded by team lock. It's not possible
1724 * to traverse list in reverse under rcu_read_lock
1725 */
1726 mutex_lock(&team->lock);
1727 list_for_each_entry(port, &team->port_list, list) {
1728 err = dev_set_mtu(port->dev, new_mtu);
1729 if (err) {
1730 netdev_err(dev, "Device %s failed to change mtu",
1731 port->dev->name);
1732 goto unwind;
1733 }
1734 }
1735 mutex_unlock(&team->lock);
1736
1737 dev->mtu = new_mtu;
1738
1739 return 0;
1740
1741 unwind:
1742 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1743 dev_set_mtu(port->dev, dev->mtu);
1744 mutex_unlock(&team->lock);
1745
1746 return err;
1747 }
1748
1749 static struct rtnl_link_stats64 *
1750 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1751 {
1752 struct team *team = netdev_priv(dev);
1753 struct team_pcpu_stats *p;
1754 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1755 u32 rx_dropped = 0, tx_dropped = 0;
1756 unsigned int start;
1757 int i;
1758
1759 for_each_possible_cpu(i) {
1760 p = per_cpu_ptr(team->pcpu_stats, i);
1761 do {
1762 start = u64_stats_fetch_begin_irq(&p->syncp);
1763 rx_packets = p->rx_packets;
1764 rx_bytes = p->rx_bytes;
1765 rx_multicast = p->rx_multicast;
1766 tx_packets = p->tx_packets;
1767 tx_bytes = p->tx_bytes;
1768 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
1769
1770 stats->rx_packets += rx_packets;
1771 stats->rx_bytes += rx_bytes;
1772 stats->multicast += rx_multicast;
1773 stats->tx_packets += tx_packets;
1774 stats->tx_bytes += tx_bytes;
1775 /*
1776 * rx_dropped & tx_dropped are u32, updated
1777 * without syncp protection.
1778 */
1779 rx_dropped += p->rx_dropped;
1780 tx_dropped += p->tx_dropped;
1781 }
1782 stats->rx_dropped = rx_dropped;
1783 stats->tx_dropped = tx_dropped;
1784 return stats;
1785 }
1786
1787 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1788 {
1789 struct team *team = netdev_priv(dev);
1790 struct team_port *port;
1791 int err;
1792
1793 /*
1794 * Alhough this is reader, it's guarded by team lock. It's not possible
1795 * to traverse list in reverse under rcu_read_lock
1796 */
1797 mutex_lock(&team->lock);
1798 list_for_each_entry(port, &team->port_list, list) {
1799 err = vlan_vid_add(port->dev, proto, vid);
1800 if (err)
1801 goto unwind;
1802 }
1803 mutex_unlock(&team->lock);
1804
1805 return 0;
1806
1807 unwind:
1808 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1809 vlan_vid_del(port->dev, proto, vid);
1810 mutex_unlock(&team->lock);
1811
1812 return err;
1813 }
1814
1815 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1816 {
1817 struct team *team = netdev_priv(dev);
1818 struct team_port *port;
1819
1820 rcu_read_lock();
1821 list_for_each_entry_rcu(port, &team->port_list, list)
1822 vlan_vid_del(port->dev, proto, vid);
1823 rcu_read_unlock();
1824
1825 return 0;
1826 }
1827
1828 #ifdef CONFIG_NET_POLL_CONTROLLER
1829 static void team_poll_controller(struct net_device *dev)
1830 {
1831 }
1832
1833 static void __team_netpoll_cleanup(struct team *team)
1834 {
1835 struct team_port *port;
1836
1837 list_for_each_entry(port, &team->port_list, list)
1838 team_port_disable_netpoll(port);
1839 }
1840
1841 static void team_netpoll_cleanup(struct net_device *dev)
1842 {
1843 struct team *team = netdev_priv(dev);
1844
1845 mutex_lock(&team->lock);
1846 __team_netpoll_cleanup(team);
1847 mutex_unlock(&team->lock);
1848 }
1849
1850 static int team_netpoll_setup(struct net_device *dev,
1851 struct netpoll_info *npifo)
1852 {
1853 struct team *team = netdev_priv(dev);
1854 struct team_port *port;
1855 int err = 0;
1856
1857 mutex_lock(&team->lock);
1858 list_for_each_entry(port, &team->port_list, list) {
1859 err = team_port_enable_netpoll(team, port);
1860 if (err) {
1861 __team_netpoll_cleanup(team);
1862 break;
1863 }
1864 }
1865 mutex_unlock(&team->lock);
1866 return err;
1867 }
1868 #endif
1869
1870 static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
1871 {
1872 struct team *team = netdev_priv(dev);
1873 int err;
1874
1875 mutex_lock(&team->lock);
1876 err = team_port_add(team, port_dev);
1877 mutex_unlock(&team->lock);
1878 return err;
1879 }
1880
1881 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1882 {
1883 struct team *team = netdev_priv(dev);
1884 int err;
1885
1886 mutex_lock(&team->lock);
1887 err = team_port_del(team, port_dev);
1888 mutex_unlock(&team->lock);
1889 return err;
1890 }
1891
1892 static netdev_features_t team_fix_features(struct net_device *dev,
1893 netdev_features_t features)
1894 {
1895 struct team_port *port;
1896 struct team *team = netdev_priv(dev);
1897 netdev_features_t mask;
1898
1899 mask = features;
1900 features &= ~NETIF_F_ONE_FOR_ALL;
1901 features |= NETIF_F_ALL_FOR_ALL;
1902
1903 rcu_read_lock();
1904 list_for_each_entry_rcu(port, &team->port_list, list) {
1905 features = netdev_increment_features(features,
1906 port->dev->features,
1907 mask);
1908 }
1909 rcu_read_unlock();
1910 return features;
1911 }
1912
1913 static int team_change_carrier(struct net_device *dev, bool new_carrier)
1914 {
1915 struct team *team = netdev_priv(dev);
1916
1917 team->user_carrier_enabled = true;
1918
1919 if (new_carrier)
1920 netif_carrier_on(dev);
1921 else
1922 netif_carrier_off(dev);
1923 return 0;
1924 }
1925
1926 static const struct net_device_ops team_netdev_ops = {
1927 .ndo_init = team_init,
1928 .ndo_uninit = team_uninit,
1929 .ndo_open = team_open,
1930 .ndo_stop = team_close,
1931 .ndo_start_xmit = team_xmit,
1932 .ndo_select_queue = team_select_queue,
1933 .ndo_change_rx_flags = team_change_rx_flags,
1934 .ndo_set_rx_mode = team_set_rx_mode,
1935 .ndo_set_mac_address = team_set_mac_address,
1936 .ndo_change_mtu = team_change_mtu,
1937 .ndo_get_stats64 = team_get_stats64,
1938 .ndo_vlan_rx_add_vid = team_vlan_rx_add_vid,
1939 .ndo_vlan_rx_kill_vid = team_vlan_rx_kill_vid,
1940 #ifdef CONFIG_NET_POLL_CONTROLLER
1941 .ndo_poll_controller = team_poll_controller,
1942 .ndo_netpoll_setup = team_netpoll_setup,
1943 .ndo_netpoll_cleanup = team_netpoll_cleanup,
1944 #endif
1945 .ndo_add_slave = team_add_slave,
1946 .ndo_del_slave = team_del_slave,
1947 .ndo_fix_features = team_fix_features,
1948 .ndo_change_carrier = team_change_carrier,
1949 };
1950
1951 /***********************
1952 * ethtool interface
1953 ***********************/
1954
1955 static void team_ethtool_get_drvinfo(struct net_device *dev,
1956 struct ethtool_drvinfo *drvinfo)
1957 {
1958 strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
1959 strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
1960 }
1961
1962 static const struct ethtool_ops team_ethtool_ops = {
1963 .get_drvinfo = team_ethtool_get_drvinfo,
1964 .get_link = ethtool_op_get_link,
1965 };
1966
1967 /***********************
1968 * rt netlink interface
1969 ***********************/
1970
1971 static void team_setup_by_port(struct net_device *dev,
1972 struct net_device *port_dev)
1973 {
1974 dev->header_ops = port_dev->header_ops;
1975 dev->type = port_dev->type;
1976 dev->hard_header_len = port_dev->hard_header_len;
1977 dev->addr_len = port_dev->addr_len;
1978 dev->mtu = port_dev->mtu;
1979 memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
1980 eth_hw_addr_inherit(dev, port_dev);
1981 }
1982
1983 static int team_dev_type_check_change(struct net_device *dev,
1984 struct net_device *port_dev)
1985 {
1986 struct team *team = netdev_priv(dev);
1987 char *portname = port_dev->name;
1988 int err;
1989
1990 if (dev->type == port_dev->type)
1991 return 0;
1992 if (!list_empty(&team->port_list)) {
1993 netdev_err(dev, "Device %s is of different type\n", portname);
1994 return -EBUSY;
1995 }
1996 err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
1997 err = notifier_to_errno(err);
1998 if (err) {
1999 netdev_err(dev, "Refused to change device type\n");
2000 return err;
2001 }
2002 dev_uc_flush(dev);
2003 dev_mc_flush(dev);
2004 team_setup_by_port(dev, port_dev);
2005 call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2006 return 0;
2007 }
2008
2009 static void team_setup(struct net_device *dev)
2010 {
2011 ether_setup(dev);
2012
2013 dev->netdev_ops = &team_netdev_ops;
2014 dev->ethtool_ops = &team_ethtool_ops;
2015 dev->destructor = team_destructor;
2016 dev->tx_queue_len = 0;
2017 dev->flags |= IFF_MULTICAST;
2018 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2019
2020 /*
2021 * Indicate we support unicast address filtering. That way core won't
2022 * bring us to promisc mode in case a unicast addr is added.
2023 * Let this up to underlay drivers.
2024 */
2025 dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2026
2027 dev->features |= NETIF_F_LLTX;
2028 dev->features |= NETIF_F_GRO;
2029
2030 /* Don't allow team devices to change network namespaces. */
2031 dev->features |= NETIF_F_NETNS_LOCAL;
2032
2033 dev->hw_features = TEAM_VLAN_FEATURES |
2034 NETIF_F_HW_VLAN_CTAG_TX |
2035 NETIF_F_HW_VLAN_CTAG_RX |
2036 NETIF_F_HW_VLAN_CTAG_FILTER;
2037
2038 dev->hw_features &= ~(NETIF_F_ALL_CSUM & ~NETIF_F_HW_CSUM);
2039 dev->features |= dev->hw_features;
2040 }
2041
2042 static int team_newlink(struct net *src_net, struct net_device *dev,
2043 struct nlattr *tb[], struct nlattr *data[])
2044 {
2045 int err;
2046
2047 if (tb[IFLA_ADDRESS] == NULL)
2048 eth_hw_addr_random(dev);
2049
2050 err = register_netdevice(dev);
2051 if (err)
2052 return err;
2053
2054 return 0;
2055 }
2056
2057 static int team_validate(struct nlattr *tb[], struct nlattr *data[])
2058 {
2059 if (tb[IFLA_ADDRESS]) {
2060 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2061 return -EINVAL;
2062 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2063 return -EADDRNOTAVAIL;
2064 }
2065 return 0;
2066 }
2067
2068 static unsigned int team_get_num_tx_queues(void)
2069 {
2070 return TEAM_DEFAULT_NUM_TX_QUEUES;
2071 }
2072
2073 static unsigned int team_get_num_rx_queues(void)
2074 {
2075 return TEAM_DEFAULT_NUM_RX_QUEUES;
2076 }
2077
2078 static struct rtnl_link_ops team_link_ops __read_mostly = {
2079 .kind = DRV_NAME,
2080 .priv_size = sizeof(struct team),
2081 .setup = team_setup,
2082 .newlink = team_newlink,
2083 .validate = team_validate,
2084 .get_num_tx_queues = team_get_num_tx_queues,
2085 .get_num_rx_queues = team_get_num_rx_queues,
2086 };
2087
2088
2089 /***********************************
2090 * Generic netlink custom interface
2091 ***********************************/
2092
2093 static struct genl_family team_nl_family = {
2094 .id = GENL_ID_GENERATE,
2095 .name = TEAM_GENL_NAME,
2096 .version = TEAM_GENL_VERSION,
2097 .maxattr = TEAM_ATTR_MAX,
2098 .netnsok = true,
2099 };
2100
2101 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2102 [TEAM_ATTR_UNSPEC] = { .type = NLA_UNSPEC, },
2103 [TEAM_ATTR_TEAM_IFINDEX] = { .type = NLA_U32 },
2104 [TEAM_ATTR_LIST_OPTION] = { .type = NLA_NESTED },
2105 [TEAM_ATTR_LIST_PORT] = { .type = NLA_NESTED },
2106 };
2107
2108 static const struct nla_policy
2109 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2110 [TEAM_ATTR_OPTION_UNSPEC] = { .type = NLA_UNSPEC, },
2111 [TEAM_ATTR_OPTION_NAME] = {
2112 .type = NLA_STRING,
2113 .len = TEAM_STRING_MAX_LEN,
2114 },
2115 [TEAM_ATTR_OPTION_CHANGED] = { .type = NLA_FLAG },
2116 [TEAM_ATTR_OPTION_TYPE] = { .type = NLA_U8 },
2117 [TEAM_ATTR_OPTION_DATA] = { .type = NLA_BINARY },
2118 };
2119
2120 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2121 {
2122 struct sk_buff *msg;
2123 void *hdr;
2124 int err;
2125
2126 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2127 if (!msg)
2128 return -ENOMEM;
2129
2130 hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2131 &team_nl_family, 0, TEAM_CMD_NOOP);
2132 if (!hdr) {
2133 err = -EMSGSIZE;
2134 goto err_msg_put;
2135 }
2136
2137 genlmsg_end(msg, hdr);
2138
2139 return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2140
2141 err_msg_put:
2142 nlmsg_free(msg);
2143
2144 return err;
2145 }
2146
2147 /*
2148 * Netlink cmd functions should be locked by following two functions.
2149 * Since dev gets held here, that ensures dev won't disappear in between.
2150 */
2151 static struct team *team_nl_team_get(struct genl_info *info)
2152 {
2153 struct net *net = genl_info_net(info);
2154 int ifindex;
2155 struct net_device *dev;
2156 struct team *team;
2157
2158 if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2159 return NULL;
2160
2161 ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2162 dev = dev_get_by_index(net, ifindex);
2163 if (!dev || dev->netdev_ops != &team_netdev_ops) {
2164 if (dev)
2165 dev_put(dev);
2166 return NULL;
2167 }
2168
2169 team = netdev_priv(dev);
2170 mutex_lock(&team->lock);
2171 return team;
2172 }
2173
2174 static void team_nl_team_put(struct team *team)
2175 {
2176 mutex_unlock(&team->lock);
2177 dev_put(team->dev);
2178 }
2179
2180 typedef int team_nl_send_func_t(struct sk_buff *skb,
2181 struct team *team, u32 portid);
2182
2183 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2184 {
2185 return genlmsg_unicast(dev_net(team->dev), skb, portid);
2186 }
2187
2188 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2189 struct team_option_inst *opt_inst)
2190 {
2191 struct nlattr *option_item;
2192 struct team_option *option = opt_inst->option;
2193 struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2194 struct team_gsetter_ctx ctx;
2195 int err;
2196
2197 ctx.info = opt_inst_info;
2198 err = team_option_get(team, opt_inst, &ctx);
2199 if (err)
2200 return err;
2201
2202 option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
2203 if (!option_item)
2204 return -EMSGSIZE;
2205
2206 if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2207 goto nest_cancel;
2208 if (opt_inst_info->port &&
2209 nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2210 opt_inst_info->port->dev->ifindex))
2211 goto nest_cancel;
2212 if (opt_inst->option->array_size &&
2213 nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2214 opt_inst_info->array_index))
2215 goto nest_cancel;
2216
2217 switch (option->type) {
2218 case TEAM_OPTION_TYPE_U32:
2219 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2220 goto nest_cancel;
2221 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2222 goto nest_cancel;
2223 break;
2224 case TEAM_OPTION_TYPE_STRING:
2225 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2226 goto nest_cancel;
2227 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2228 ctx.data.str_val))
2229 goto nest_cancel;
2230 break;
2231 case TEAM_OPTION_TYPE_BINARY:
2232 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2233 goto nest_cancel;
2234 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2235 ctx.data.bin_val.ptr))
2236 goto nest_cancel;
2237 break;
2238 case TEAM_OPTION_TYPE_BOOL:
2239 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2240 goto nest_cancel;
2241 if (ctx.data.bool_val &&
2242 nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2243 goto nest_cancel;
2244 break;
2245 case TEAM_OPTION_TYPE_S32:
2246 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2247 goto nest_cancel;
2248 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2249 goto nest_cancel;
2250 break;
2251 default:
2252 BUG();
2253 }
2254 if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2255 goto nest_cancel;
2256 if (opt_inst->changed) {
2257 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2258 goto nest_cancel;
2259 opt_inst->changed = false;
2260 }
2261 nla_nest_end(skb, option_item);
2262 return 0;
2263
2264 nest_cancel:
2265 nla_nest_cancel(skb, option_item);
2266 return -EMSGSIZE;
2267 }
2268
2269 static int __send_and_alloc_skb(struct sk_buff **pskb,
2270 struct team *team, u32 portid,
2271 team_nl_send_func_t *send_func)
2272 {
2273 int err;
2274
2275 if (*pskb) {
2276 err = send_func(*pskb, team, portid);
2277 if (err)
2278 return err;
2279 }
2280 *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2281 if (!*pskb)
2282 return -ENOMEM;
2283 return 0;
2284 }
2285
2286 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2287 int flags, team_nl_send_func_t *send_func,
2288 struct list_head *sel_opt_inst_list)
2289 {
2290 struct nlattr *option_list;
2291 struct nlmsghdr *nlh;
2292 void *hdr;
2293 struct team_option_inst *opt_inst;
2294 int err;
2295 struct sk_buff *skb = NULL;
2296 bool incomplete;
2297 int i;
2298
2299 opt_inst = list_first_entry(sel_opt_inst_list,
2300 struct team_option_inst, tmp_list);
2301
2302 start_again:
2303 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2304 if (err)
2305 return err;
2306
2307 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2308 TEAM_CMD_OPTIONS_GET);
2309 if (!hdr)
2310 return -EMSGSIZE;
2311
2312 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2313 goto nla_put_failure;
2314 option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2315 if (!option_list)
2316 goto nla_put_failure;
2317
2318 i = 0;
2319 incomplete = false;
2320 list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2321 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2322 if (err) {
2323 if (err == -EMSGSIZE) {
2324 if (!i)
2325 goto errout;
2326 incomplete = true;
2327 break;
2328 }
2329 goto errout;
2330 }
2331 i++;
2332 }
2333
2334 nla_nest_end(skb, option_list);
2335 genlmsg_end(skb, hdr);
2336 if (incomplete)
2337 goto start_again;
2338
2339 send_done:
2340 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2341 if (!nlh) {
2342 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2343 if (err)
2344 goto errout;
2345 goto send_done;
2346 }
2347
2348 return send_func(skb, team, portid);
2349
2350 nla_put_failure:
2351 err = -EMSGSIZE;
2352 errout:
2353 genlmsg_cancel(skb, hdr);
2354 nlmsg_free(skb);
2355 return err;
2356 }
2357
2358 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2359 {
2360 struct team *team;
2361 struct team_option_inst *opt_inst;
2362 int err;
2363 LIST_HEAD(sel_opt_inst_list);
2364
2365 team = team_nl_team_get(info);
2366 if (!team)
2367 return -EINVAL;
2368
2369 list_for_each_entry(opt_inst, &team->option_inst_list, list)
2370 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2371 err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2372 NLM_F_ACK, team_nl_send_unicast,
2373 &sel_opt_inst_list);
2374
2375 team_nl_team_put(team);
2376
2377 return err;
2378 }
2379
2380 static int team_nl_send_event_options_get(struct team *team,
2381 struct list_head *sel_opt_inst_list);
2382
2383 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2384 {
2385 struct team *team;
2386 int err = 0;
2387 int i;
2388 struct nlattr *nl_option;
2389 LIST_HEAD(opt_inst_list);
2390
2391 team = team_nl_team_get(info);
2392 if (!team)
2393 return -EINVAL;
2394
2395 err = -EINVAL;
2396 if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2397 err = -EINVAL;
2398 goto team_put;
2399 }
2400
2401 nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2402 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2403 struct nlattr *attr;
2404 struct nlattr *attr_data;
2405 enum team_option_type opt_type;
2406 int opt_port_ifindex = 0; /* != 0 for per-port options */
2407 u32 opt_array_index = 0;
2408 bool opt_is_array = false;
2409 struct team_option_inst *opt_inst;
2410 char *opt_name;
2411 bool opt_found = false;
2412
2413 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2414 err = -EINVAL;
2415 goto team_put;
2416 }
2417 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2418 nl_option, team_nl_option_policy);
2419 if (err)
2420 goto team_put;
2421 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2422 !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2423 err = -EINVAL;
2424 goto team_put;
2425 }
2426 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2427 case NLA_U32:
2428 opt_type = TEAM_OPTION_TYPE_U32;
2429 break;
2430 case NLA_STRING:
2431 opt_type = TEAM_OPTION_TYPE_STRING;
2432 break;
2433 case NLA_BINARY:
2434 opt_type = TEAM_OPTION_TYPE_BINARY;
2435 break;
2436 case NLA_FLAG:
2437 opt_type = TEAM_OPTION_TYPE_BOOL;
2438 break;
2439 case NLA_S32:
2440 opt_type = TEAM_OPTION_TYPE_S32;
2441 break;
2442 default:
2443 goto team_put;
2444 }
2445
2446 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2447 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2448 err = -EINVAL;
2449 goto team_put;
2450 }
2451
2452 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2453 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2454 if (attr)
2455 opt_port_ifindex = nla_get_u32(attr);
2456
2457 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2458 if (attr) {
2459 opt_is_array = true;
2460 opt_array_index = nla_get_u32(attr);
2461 }
2462
2463 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2464 struct team_option *option = opt_inst->option;
2465 struct team_gsetter_ctx ctx;
2466 struct team_option_inst_info *opt_inst_info;
2467 int tmp_ifindex;
2468
2469 opt_inst_info = &opt_inst->info;
2470 tmp_ifindex = opt_inst_info->port ?
2471 opt_inst_info->port->dev->ifindex : 0;
2472 if (option->type != opt_type ||
2473 strcmp(option->name, opt_name) ||
2474 tmp_ifindex != opt_port_ifindex ||
2475 (option->array_size && !opt_is_array) ||
2476 opt_inst_info->array_index != opt_array_index)
2477 continue;
2478 opt_found = true;
2479 ctx.info = opt_inst_info;
2480 switch (opt_type) {
2481 case TEAM_OPTION_TYPE_U32:
2482 ctx.data.u32_val = nla_get_u32(attr_data);
2483 break;
2484 case TEAM_OPTION_TYPE_STRING:
2485 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2486 err = -EINVAL;
2487 goto team_put;
2488 }
2489 ctx.data.str_val = nla_data(attr_data);
2490 break;
2491 case TEAM_OPTION_TYPE_BINARY:
2492 ctx.data.bin_val.len = nla_len(attr_data);
2493 ctx.data.bin_val.ptr = nla_data(attr_data);
2494 break;
2495 case TEAM_OPTION_TYPE_BOOL:
2496 ctx.data.bool_val = attr_data ? true : false;
2497 break;
2498 case TEAM_OPTION_TYPE_S32:
2499 ctx.data.s32_val = nla_get_s32(attr_data);
2500 break;
2501 default:
2502 BUG();
2503 }
2504 err = team_option_set(team, opt_inst, &ctx);
2505 if (err)
2506 goto team_put;
2507 opt_inst->changed = true;
2508 list_add(&opt_inst->tmp_list, &opt_inst_list);
2509 }
2510 if (!opt_found) {
2511 err = -ENOENT;
2512 goto team_put;
2513 }
2514 }
2515
2516 err = team_nl_send_event_options_get(team, &opt_inst_list);
2517
2518 team_put:
2519 team_nl_team_put(team);
2520
2521 return err;
2522 }
2523
2524 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2525 struct team_port *port)
2526 {
2527 struct nlattr *port_item;
2528
2529 port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2530 if (!port_item)
2531 goto nest_cancel;
2532 if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2533 goto nest_cancel;
2534 if (port->changed) {
2535 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2536 goto nest_cancel;
2537 port->changed = false;
2538 }
2539 if ((port->removed &&
2540 nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2541 (port->state.linkup &&
2542 nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2543 nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2544 nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2545 goto nest_cancel;
2546 nla_nest_end(skb, port_item);
2547 return 0;
2548
2549 nest_cancel:
2550 nla_nest_cancel(skb, port_item);
2551 return -EMSGSIZE;
2552 }
2553
2554 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2555 int flags, team_nl_send_func_t *send_func,
2556 struct team_port *one_port)
2557 {
2558 struct nlattr *port_list;
2559 struct nlmsghdr *nlh;
2560 void *hdr;
2561 struct team_port *port;
2562 int err;
2563 struct sk_buff *skb = NULL;
2564 bool incomplete;
2565 int i;
2566
2567 port = list_first_entry_or_null(&team->port_list,
2568 struct team_port, list);
2569
2570 start_again:
2571 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2572 if (err)
2573 return err;
2574
2575 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2576 TEAM_CMD_PORT_LIST_GET);
2577 if (!hdr)
2578 return -EMSGSIZE;
2579
2580 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2581 goto nla_put_failure;
2582 port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2583 if (!port_list)
2584 goto nla_put_failure;
2585
2586 i = 0;
2587 incomplete = false;
2588
2589 /* If one port is selected, called wants to send port list containing
2590 * only this port. Otherwise go through all listed ports and send all
2591 */
2592 if (one_port) {
2593 err = team_nl_fill_one_port_get(skb, one_port);
2594 if (err)
2595 goto errout;
2596 } else if (port) {
2597 list_for_each_entry_from(port, &team->port_list, list) {
2598 err = team_nl_fill_one_port_get(skb, port);
2599 if (err) {
2600 if (err == -EMSGSIZE) {
2601 if (!i)
2602 goto errout;
2603 incomplete = true;
2604 break;
2605 }
2606 goto errout;
2607 }
2608 i++;
2609 }
2610 }
2611
2612 nla_nest_end(skb, port_list);
2613 genlmsg_end(skb, hdr);
2614 if (incomplete)
2615 goto start_again;
2616
2617 send_done:
2618 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2619 if (!nlh) {
2620 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2621 if (err)
2622 goto errout;
2623 goto send_done;
2624 }
2625
2626 return send_func(skb, team, portid);
2627
2628 nla_put_failure:
2629 err = -EMSGSIZE;
2630 errout:
2631 genlmsg_cancel(skb, hdr);
2632 nlmsg_free(skb);
2633 return err;
2634 }
2635
2636 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2637 struct genl_info *info)
2638 {
2639 struct team *team;
2640 int err;
2641
2642 team = team_nl_team_get(info);
2643 if (!team)
2644 return -EINVAL;
2645
2646 err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2647 NLM_F_ACK, team_nl_send_unicast, NULL);
2648
2649 team_nl_team_put(team);
2650
2651 return err;
2652 }
2653
2654 static const struct genl_ops team_nl_ops[] = {
2655 {
2656 .cmd = TEAM_CMD_NOOP,
2657 .doit = team_nl_cmd_noop,
2658 .policy = team_nl_policy,
2659 },
2660 {
2661 .cmd = TEAM_CMD_OPTIONS_SET,
2662 .doit = team_nl_cmd_options_set,
2663 .policy = team_nl_policy,
2664 .flags = GENL_ADMIN_PERM,
2665 },
2666 {
2667 .cmd = TEAM_CMD_OPTIONS_GET,
2668 .doit = team_nl_cmd_options_get,
2669 .policy = team_nl_policy,
2670 .flags = GENL_ADMIN_PERM,
2671 },
2672 {
2673 .cmd = TEAM_CMD_PORT_LIST_GET,
2674 .doit = team_nl_cmd_port_list_get,
2675 .policy = team_nl_policy,
2676 .flags = GENL_ADMIN_PERM,
2677 },
2678 };
2679
2680 static const struct genl_multicast_group team_nl_mcgrps[] = {
2681 { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2682 };
2683
2684 static int team_nl_send_multicast(struct sk_buff *skb,
2685 struct team *team, u32 portid)
2686 {
2687 return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2688 skb, 0, 0, GFP_KERNEL);
2689 }
2690
2691 static int team_nl_send_event_options_get(struct team *team,
2692 struct list_head *sel_opt_inst_list)
2693 {
2694 return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2695 sel_opt_inst_list);
2696 }
2697
2698 static int team_nl_send_event_port_get(struct team *team,
2699 struct team_port *port)
2700 {
2701 return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2702 port);
2703 }
2704
2705 static int team_nl_init(void)
2706 {
2707 return genl_register_family_with_ops_groups(&team_nl_family, team_nl_ops,
2708 team_nl_mcgrps);
2709 }
2710
2711 static void team_nl_fini(void)
2712 {
2713 genl_unregister_family(&team_nl_family);
2714 }
2715
2716
2717 /******************
2718 * Change checkers
2719 ******************/
2720
2721 static void __team_options_change_check(struct team *team)
2722 {
2723 int err;
2724 struct team_option_inst *opt_inst;
2725 LIST_HEAD(sel_opt_inst_list);
2726
2727 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2728 if (opt_inst->changed)
2729 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2730 }
2731 err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2732 if (err && err != -ESRCH)
2733 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2734 err);
2735 }
2736
2737 /* rtnl lock is held */
2738
2739 static void __team_port_change_send(struct team_port *port, bool linkup)
2740 {
2741 int err;
2742
2743 port->changed = true;
2744 port->state.linkup = linkup;
2745 team_refresh_port_linkup(port);
2746 if (linkup) {
2747 struct ethtool_cmd ecmd;
2748
2749 err = __ethtool_get_settings(port->dev, &ecmd);
2750 if (!err) {
2751 port->state.speed = ethtool_cmd_speed(&ecmd);
2752 port->state.duplex = ecmd.duplex;
2753 goto send_event;
2754 }
2755 }
2756 port->state.speed = 0;
2757 port->state.duplex = 0;
2758
2759 send_event:
2760 err = team_nl_send_event_port_get(port->team, port);
2761 if (err && err != -ESRCH)
2762 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2763 port->dev->name, err);
2764
2765 }
2766
2767 static void __team_carrier_check(struct team *team)
2768 {
2769 struct team_port *port;
2770 bool team_linkup;
2771
2772 if (team->user_carrier_enabled)
2773 return;
2774
2775 team_linkup = false;
2776 list_for_each_entry(port, &team->port_list, list) {
2777 if (port->linkup) {
2778 team_linkup = true;
2779 break;
2780 }
2781 }
2782
2783 if (team_linkup)
2784 netif_carrier_on(team->dev);
2785 else
2786 netif_carrier_off(team->dev);
2787 }
2788
2789 static void __team_port_change_check(struct team_port *port, bool linkup)
2790 {
2791 if (port->state.linkup != linkup)
2792 __team_port_change_send(port, linkup);
2793 __team_carrier_check(port->team);
2794 }
2795
2796 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2797 {
2798 __team_port_change_send(port, linkup);
2799 __team_carrier_check(port->team);
2800 }
2801
2802 static void __team_port_change_port_removed(struct team_port *port)
2803 {
2804 port->removed = true;
2805 __team_port_change_send(port, false);
2806 __team_carrier_check(port->team);
2807 }
2808
2809 static void team_port_change_check(struct team_port *port, bool linkup)
2810 {
2811 struct team *team = port->team;
2812
2813 mutex_lock(&team->lock);
2814 __team_port_change_check(port, linkup);
2815 mutex_unlock(&team->lock);
2816 }
2817
2818
2819 /************************************
2820 * Net device notifier event handler
2821 ************************************/
2822
2823 static int team_device_event(struct notifier_block *unused,
2824 unsigned long event, void *ptr)
2825 {
2826 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2827 struct team_port *port;
2828
2829 port = team_port_get_rtnl(dev);
2830 if (!port)
2831 return NOTIFY_DONE;
2832
2833 switch (event) {
2834 case NETDEV_UP:
2835 if (netif_carrier_ok(dev))
2836 team_port_change_check(port, true);
2837 break;
2838 case NETDEV_DOWN:
2839 team_port_change_check(port, false);
2840 break;
2841 case NETDEV_CHANGE:
2842 if (netif_running(port->dev))
2843 team_port_change_check(port,
2844 !!netif_carrier_ok(port->dev));
2845 break;
2846 case NETDEV_UNREGISTER:
2847 team_del_slave(port->team->dev, dev);
2848 break;
2849 case NETDEV_FEAT_CHANGE:
2850 team_compute_features(port->team);
2851 break;
2852 case NETDEV_PRECHANGEMTU:
2853 /* Forbid to change mtu of underlaying device */
2854 return NOTIFY_BAD;
2855 case NETDEV_PRE_TYPE_CHANGE:
2856 /* Forbid to change type of underlaying device */
2857 return NOTIFY_BAD;
2858 case NETDEV_RESEND_IGMP:
2859 /* Propagate to master device */
2860 call_netdevice_notifiers(event, port->team->dev);
2861 break;
2862 }
2863 return NOTIFY_DONE;
2864 }
2865
2866 static struct notifier_block team_notifier_block __read_mostly = {
2867 .notifier_call = team_device_event,
2868 };
2869
2870
2871 /***********************
2872 * Module init and exit
2873 ***********************/
2874
2875 static int __init team_module_init(void)
2876 {
2877 int err;
2878
2879 register_netdevice_notifier(&team_notifier_block);
2880
2881 err = rtnl_link_register(&team_link_ops);
2882 if (err)
2883 goto err_rtnl_reg;
2884
2885 err = team_nl_init();
2886 if (err)
2887 goto err_nl_init;
2888
2889 return 0;
2890
2891 err_nl_init:
2892 rtnl_link_unregister(&team_link_ops);
2893
2894 err_rtnl_reg:
2895 unregister_netdevice_notifier(&team_notifier_block);
2896
2897 return err;
2898 }
2899
2900 static void __exit team_module_exit(void)
2901 {
2902 team_nl_fini();
2903 rtnl_link_unregister(&team_link_ops);
2904 unregister_netdevice_notifier(&team_notifier_block);
2905 }
2906
2907 module_init(team_module_init);
2908 module_exit(team_module_exit);
2909
2910 MODULE_LICENSE("GPL v2");
2911 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
2912 MODULE_DESCRIPTION("Ethernet team device driver");
2913 MODULE_ALIAS_RTNL_LINK(DRV_NAME);
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