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2721e29935a61a830813d6cfea7c0c6ad75edb8a
[deliverable/linux.git] / drivers / net / team / team.c
1 /*
2 * drivers/net/team/team.c - Network team device driver
3 * Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 */
10
11 #include <linux/kernel.h>
12 #include <linux/types.h>
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/slab.h>
16 #include <linux/rcupdate.h>
17 #include <linux/errno.h>
18 #include <linux/ctype.h>
19 #include <linux/notifier.h>
20 #include <linux/netdevice.h>
21 #include <linux/netpoll.h>
22 #include <linux/if_vlan.h>
23 #include <linux/if_arp.h>
24 #include <linux/socket.h>
25 #include <linux/etherdevice.h>
26 #include <linux/rtnetlink.h>
27 #include <net/rtnetlink.h>
28 #include <net/genetlink.h>
29 #include <net/netlink.h>
30 #include <net/sch_generic.h>
31 #include <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 gfp_t gfp)
1036 {
1037 struct netpoll *np;
1038 int err;
1039
1040 if (!team->dev->npinfo)
1041 return 0;
1042
1043 np = kzalloc(sizeof(*np), gfp);
1044 if (!np)
1045 return -ENOMEM;
1046
1047 err = __netpoll_setup(np, port->dev, gfp);
1048 if (err) {
1049 kfree(np);
1050 return err;
1051 }
1052 port->np = np;
1053 return err;
1054 }
1055
1056 static void team_port_disable_netpoll(struct team_port *port)
1057 {
1058 struct netpoll *np = port->np;
1059
1060 if (!np)
1061 return;
1062 port->np = NULL;
1063
1064 /* Wait for transmitting packets to finish before freeing. */
1065 synchronize_rcu_bh();
1066 __netpoll_cleanup(np);
1067 kfree(np);
1068 }
1069 #else
1070 static int team_port_enable_netpoll(struct team *team, struct team_port *port,
1071 gfp_t gfp)
1072 {
1073 return 0;
1074 }
1075 static void team_port_disable_netpoll(struct team_port *port)
1076 {
1077 }
1078 #endif
1079
1080 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1081 static int team_dev_type_check_change(struct net_device *dev,
1082 struct net_device *port_dev);
1083
1084 static int team_port_add(struct team *team, struct net_device *port_dev)
1085 {
1086 struct net_device *dev = team->dev;
1087 struct team_port *port;
1088 char *portname = port_dev->name;
1089 int err;
1090
1091 if (port_dev->flags & IFF_LOOPBACK) {
1092 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1093 portname);
1094 return -EINVAL;
1095 }
1096
1097 if (team_port_exists(port_dev)) {
1098 netdev_err(dev, "Device %s is already a port "
1099 "of a team device\n", portname);
1100 return -EBUSY;
1101 }
1102
1103 if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1104 vlan_uses_dev(dev)) {
1105 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1106 portname);
1107 return -EPERM;
1108 }
1109
1110 err = team_dev_type_check_change(dev, port_dev);
1111 if (err)
1112 return err;
1113
1114 if (port_dev->flags & IFF_UP) {
1115 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1116 portname);
1117 return -EBUSY;
1118 }
1119
1120 port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1121 GFP_KERNEL);
1122 if (!port)
1123 return -ENOMEM;
1124
1125 port->dev = port_dev;
1126 port->team = team;
1127 INIT_LIST_HEAD(&port->qom_list);
1128
1129 port->orig.mtu = port_dev->mtu;
1130 err = dev_set_mtu(port_dev, dev->mtu);
1131 if (err) {
1132 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1133 goto err_set_mtu;
1134 }
1135
1136 memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1137
1138 err = team_port_enter(team, port);
1139 if (err) {
1140 netdev_err(dev, "Device %s failed to enter team mode\n",
1141 portname);
1142 goto err_port_enter;
1143 }
1144
1145 err = dev_open(port_dev);
1146 if (err) {
1147 netdev_dbg(dev, "Device %s opening failed\n",
1148 portname);
1149 goto err_dev_open;
1150 }
1151
1152 err = vlan_vids_add_by_dev(port_dev, dev);
1153 if (err) {
1154 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1155 portname);
1156 goto err_vids_add;
1157 }
1158
1159 err = team_port_enable_netpoll(team, port, GFP_KERNEL);
1160 if (err) {
1161 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1162 portname);
1163 goto err_enable_netpoll;
1164 }
1165
1166 err = netdev_master_upper_dev_link(port_dev, dev);
1167 if (err) {
1168 netdev_err(dev, "Device %s failed to set upper link\n",
1169 portname);
1170 goto err_set_upper_link;
1171 }
1172
1173 err = netdev_rx_handler_register(port_dev, team_handle_frame,
1174 port);
1175 if (err) {
1176 netdev_err(dev, "Device %s failed to register rx_handler\n",
1177 portname);
1178 goto err_handler_register;
1179 }
1180
1181 err = __team_option_inst_add_port(team, port);
1182 if (err) {
1183 netdev_err(dev, "Device %s failed to add per-port options\n",
1184 portname);
1185 goto err_option_port_add;
1186 }
1187
1188 port->index = -1;
1189 list_add_tail_rcu(&port->list, &team->port_list);
1190 team_port_enable(team, port);
1191 __team_compute_features(team);
1192 __team_port_change_port_added(port, !!netif_carrier_ok(port_dev));
1193 __team_options_change_check(team);
1194
1195 netdev_info(dev, "Port device %s added\n", portname);
1196
1197 return 0;
1198
1199 err_option_port_add:
1200 netdev_rx_handler_unregister(port_dev);
1201
1202 err_handler_register:
1203 netdev_upper_dev_unlink(port_dev, dev);
1204
1205 err_set_upper_link:
1206 team_port_disable_netpoll(port);
1207
1208 err_enable_netpoll:
1209 vlan_vids_del_by_dev(port_dev, dev);
1210
1211 err_vids_add:
1212 dev_close(port_dev);
1213
1214 err_dev_open:
1215 team_port_leave(team, port);
1216 team_port_set_orig_dev_addr(port);
1217
1218 err_port_enter:
1219 dev_set_mtu(port_dev, port->orig.mtu);
1220
1221 err_set_mtu:
1222 kfree(port);
1223
1224 return err;
1225 }
1226
1227 static void __team_port_change_port_removed(struct team_port *port);
1228
1229 static int team_port_del(struct team *team, struct net_device *port_dev)
1230 {
1231 struct net_device *dev = team->dev;
1232 struct team_port *port;
1233 char *portname = port_dev->name;
1234
1235 port = team_port_get_rtnl(port_dev);
1236 if (!port || !team_port_find(team, port)) {
1237 netdev_err(dev, "Device %s does not act as a port of this team\n",
1238 portname);
1239 return -ENOENT;
1240 }
1241
1242 team_port_disable(team, port);
1243 list_del_rcu(&port->list);
1244 netdev_rx_handler_unregister(port_dev);
1245 netdev_upper_dev_unlink(port_dev, dev);
1246 team_port_disable_netpoll(port);
1247 vlan_vids_del_by_dev(port_dev, dev);
1248 dev_uc_unsync(port_dev, dev);
1249 dev_mc_unsync(port_dev, dev);
1250 dev_close(port_dev);
1251 team_port_leave(team, port);
1252
1253 __team_option_inst_mark_removed_port(team, port);
1254 __team_options_change_check(team);
1255 __team_option_inst_del_port(team, port);
1256 __team_port_change_port_removed(port);
1257
1258 team_port_set_orig_dev_addr(port);
1259 dev_set_mtu(port_dev, port->orig.mtu);
1260 kfree_rcu(port, rcu);
1261 netdev_info(dev, "Port device %s removed\n", portname);
1262 __team_compute_features(team);
1263
1264 return 0;
1265 }
1266
1267
1268 /*****************
1269 * Net device ops
1270 *****************/
1271
1272 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1273 {
1274 ctx->data.str_val = team->mode->kind;
1275 return 0;
1276 }
1277
1278 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1279 {
1280 return team_change_mode(team, ctx->data.str_val);
1281 }
1282
1283 static int team_notify_peers_count_get(struct team *team,
1284 struct team_gsetter_ctx *ctx)
1285 {
1286 ctx->data.u32_val = team->notify_peers.count;
1287 return 0;
1288 }
1289
1290 static int team_notify_peers_count_set(struct team *team,
1291 struct team_gsetter_ctx *ctx)
1292 {
1293 team->notify_peers.count = ctx->data.u32_val;
1294 return 0;
1295 }
1296
1297 static int team_notify_peers_interval_get(struct team *team,
1298 struct team_gsetter_ctx *ctx)
1299 {
1300 ctx->data.u32_val = team->notify_peers.interval;
1301 return 0;
1302 }
1303
1304 static int team_notify_peers_interval_set(struct team *team,
1305 struct team_gsetter_ctx *ctx)
1306 {
1307 team->notify_peers.interval = ctx->data.u32_val;
1308 return 0;
1309 }
1310
1311 static int team_mcast_rejoin_count_get(struct team *team,
1312 struct team_gsetter_ctx *ctx)
1313 {
1314 ctx->data.u32_val = team->mcast_rejoin.count;
1315 return 0;
1316 }
1317
1318 static int team_mcast_rejoin_count_set(struct team *team,
1319 struct team_gsetter_ctx *ctx)
1320 {
1321 team->mcast_rejoin.count = ctx->data.u32_val;
1322 return 0;
1323 }
1324
1325 static int team_mcast_rejoin_interval_get(struct team *team,
1326 struct team_gsetter_ctx *ctx)
1327 {
1328 ctx->data.u32_val = team->mcast_rejoin.interval;
1329 return 0;
1330 }
1331
1332 static int team_mcast_rejoin_interval_set(struct team *team,
1333 struct team_gsetter_ctx *ctx)
1334 {
1335 team->mcast_rejoin.interval = ctx->data.u32_val;
1336 return 0;
1337 }
1338
1339 static int team_port_en_option_get(struct team *team,
1340 struct team_gsetter_ctx *ctx)
1341 {
1342 struct team_port *port = ctx->info->port;
1343
1344 ctx->data.bool_val = team_port_enabled(port);
1345 return 0;
1346 }
1347
1348 static int team_port_en_option_set(struct team *team,
1349 struct team_gsetter_ctx *ctx)
1350 {
1351 struct team_port *port = ctx->info->port;
1352
1353 if (ctx->data.bool_val)
1354 team_port_enable(team, port);
1355 else
1356 team_port_disable(team, port);
1357 return 0;
1358 }
1359
1360 static int team_user_linkup_option_get(struct team *team,
1361 struct team_gsetter_ctx *ctx)
1362 {
1363 struct team_port *port = ctx->info->port;
1364
1365 ctx->data.bool_val = port->user.linkup;
1366 return 0;
1367 }
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 return 0;
1377 }
1378
1379 static int team_user_linkup_en_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_enabled;
1385 return 0;
1386 }
1387
1388 static int team_user_linkup_en_option_set(struct team *team,
1389 struct team_gsetter_ctx *ctx)
1390 {
1391 struct team_port *port = ctx->info->port;
1392
1393 port->user.linkup_enabled = ctx->data.bool_val;
1394 team_refresh_port_linkup(port);
1395 return 0;
1396 }
1397
1398 static int team_priority_option_get(struct team *team,
1399 struct team_gsetter_ctx *ctx)
1400 {
1401 struct team_port *port = ctx->info->port;
1402
1403 ctx->data.s32_val = port->priority;
1404 return 0;
1405 }
1406
1407 static int team_priority_option_set(struct team *team,
1408 struct team_gsetter_ctx *ctx)
1409 {
1410 struct team_port *port = ctx->info->port;
1411 s32 priority = ctx->data.s32_val;
1412
1413 if (port->priority == priority)
1414 return 0;
1415 port->priority = priority;
1416 team_queue_override_port_prio_changed(team, port);
1417 return 0;
1418 }
1419
1420 static int team_queue_id_option_get(struct team *team,
1421 struct team_gsetter_ctx *ctx)
1422 {
1423 struct team_port *port = ctx->info->port;
1424
1425 ctx->data.u32_val = port->queue_id;
1426 return 0;
1427 }
1428
1429 static int team_queue_id_option_set(struct team *team,
1430 struct team_gsetter_ctx *ctx)
1431 {
1432 struct team_port *port = ctx->info->port;
1433 u16 new_queue_id = ctx->data.u32_val;
1434
1435 if (port->queue_id == new_queue_id)
1436 return 0;
1437 if (new_queue_id >= team->dev->real_num_tx_queues)
1438 return -EINVAL;
1439 team_queue_override_port_change_queue_id(team, port, new_queue_id);
1440 return 0;
1441 }
1442
1443 static const struct team_option team_options[] = {
1444 {
1445 .name = "mode",
1446 .type = TEAM_OPTION_TYPE_STRING,
1447 .getter = team_mode_option_get,
1448 .setter = team_mode_option_set,
1449 },
1450 {
1451 .name = "notify_peers_count",
1452 .type = TEAM_OPTION_TYPE_U32,
1453 .getter = team_notify_peers_count_get,
1454 .setter = team_notify_peers_count_set,
1455 },
1456 {
1457 .name = "notify_peers_interval",
1458 .type = TEAM_OPTION_TYPE_U32,
1459 .getter = team_notify_peers_interval_get,
1460 .setter = team_notify_peers_interval_set,
1461 },
1462 {
1463 .name = "mcast_rejoin_count",
1464 .type = TEAM_OPTION_TYPE_U32,
1465 .getter = team_mcast_rejoin_count_get,
1466 .setter = team_mcast_rejoin_count_set,
1467 },
1468 {
1469 .name = "mcast_rejoin_interval",
1470 .type = TEAM_OPTION_TYPE_U32,
1471 .getter = team_mcast_rejoin_interval_get,
1472 .setter = team_mcast_rejoin_interval_set,
1473 },
1474 {
1475 .name = "enabled",
1476 .type = TEAM_OPTION_TYPE_BOOL,
1477 .per_port = true,
1478 .getter = team_port_en_option_get,
1479 .setter = team_port_en_option_set,
1480 },
1481 {
1482 .name = "user_linkup",
1483 .type = TEAM_OPTION_TYPE_BOOL,
1484 .per_port = true,
1485 .getter = team_user_linkup_option_get,
1486 .setter = team_user_linkup_option_set,
1487 },
1488 {
1489 .name = "user_linkup_enabled",
1490 .type = TEAM_OPTION_TYPE_BOOL,
1491 .per_port = true,
1492 .getter = team_user_linkup_en_option_get,
1493 .setter = team_user_linkup_en_option_set,
1494 },
1495 {
1496 .name = "priority",
1497 .type = TEAM_OPTION_TYPE_S32,
1498 .per_port = true,
1499 .getter = team_priority_option_get,
1500 .setter = team_priority_option_set,
1501 },
1502 {
1503 .name = "queue_id",
1504 .type = TEAM_OPTION_TYPE_U32,
1505 .per_port = true,
1506 .getter = team_queue_id_option_get,
1507 .setter = team_queue_id_option_set,
1508 },
1509 };
1510
1511 static struct lock_class_key team_netdev_xmit_lock_key;
1512 static struct lock_class_key team_netdev_addr_lock_key;
1513 static struct lock_class_key team_tx_busylock_key;
1514
1515 static void team_set_lockdep_class_one(struct net_device *dev,
1516 struct netdev_queue *txq,
1517 void *unused)
1518 {
1519 lockdep_set_class(&txq->_xmit_lock, &team_netdev_xmit_lock_key);
1520 }
1521
1522 static void team_set_lockdep_class(struct net_device *dev)
1523 {
1524 lockdep_set_class(&dev->addr_list_lock, &team_netdev_addr_lock_key);
1525 netdev_for_each_tx_queue(dev, team_set_lockdep_class_one, NULL);
1526 dev->qdisc_tx_busylock = &team_tx_busylock_key;
1527 }
1528
1529 static int team_init(struct net_device *dev)
1530 {
1531 struct team *team = netdev_priv(dev);
1532 int i;
1533 int err;
1534
1535 team->dev = dev;
1536 mutex_init(&team->lock);
1537 team_set_no_mode(team);
1538
1539 team->pcpu_stats = alloc_percpu(struct team_pcpu_stats);
1540 if (!team->pcpu_stats)
1541 return -ENOMEM;
1542
1543 for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1544 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1545 INIT_LIST_HEAD(&team->port_list);
1546 err = team_queue_override_init(team);
1547 if (err)
1548 goto err_team_queue_override_init;
1549
1550 team_adjust_ops(team);
1551
1552 INIT_LIST_HEAD(&team->option_list);
1553 INIT_LIST_HEAD(&team->option_inst_list);
1554
1555 team_notify_peers_init(team);
1556 team_mcast_rejoin_init(team);
1557
1558 err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1559 if (err)
1560 goto err_options_register;
1561 netif_carrier_off(dev);
1562
1563 team_set_lockdep_class(dev);
1564
1565 return 0;
1566
1567 err_options_register:
1568 team_mcast_rejoin_fini(team);
1569 team_notify_peers_fini(team);
1570 team_queue_override_fini(team);
1571 err_team_queue_override_init:
1572 free_percpu(team->pcpu_stats);
1573
1574 return err;
1575 }
1576
1577 static void team_uninit(struct net_device *dev)
1578 {
1579 struct team *team = netdev_priv(dev);
1580 struct team_port *port;
1581 struct team_port *tmp;
1582
1583 mutex_lock(&team->lock);
1584 list_for_each_entry_safe(port, tmp, &team->port_list, list)
1585 team_port_del(team, port->dev);
1586
1587 __team_change_mode(team, NULL); /* cleanup */
1588 __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1589 team_mcast_rejoin_fini(team);
1590 team_notify_peers_fini(team);
1591 team_queue_override_fini(team);
1592 mutex_unlock(&team->lock);
1593 }
1594
1595 static void team_destructor(struct net_device *dev)
1596 {
1597 struct team *team = netdev_priv(dev);
1598
1599 free_percpu(team->pcpu_stats);
1600 free_netdev(dev);
1601 }
1602
1603 static int team_open(struct net_device *dev)
1604 {
1605 return 0;
1606 }
1607
1608 static int team_close(struct net_device *dev)
1609 {
1610 return 0;
1611 }
1612
1613 /*
1614 * note: already called with rcu_read_lock
1615 */
1616 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1617 {
1618 struct team *team = netdev_priv(dev);
1619 bool tx_success;
1620 unsigned int len = skb->len;
1621
1622 tx_success = team_queue_override_transmit(team, skb);
1623 if (!tx_success)
1624 tx_success = team->ops.transmit(team, skb);
1625 if (tx_success) {
1626 struct team_pcpu_stats *pcpu_stats;
1627
1628 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1629 u64_stats_update_begin(&pcpu_stats->syncp);
1630 pcpu_stats->tx_packets++;
1631 pcpu_stats->tx_bytes += len;
1632 u64_stats_update_end(&pcpu_stats->syncp);
1633 } else {
1634 this_cpu_inc(team->pcpu_stats->tx_dropped);
1635 }
1636
1637 return NETDEV_TX_OK;
1638 }
1639
1640 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb)
1641 {
1642 /*
1643 * This helper function exists to help dev_pick_tx get the correct
1644 * destination queue. Using a helper function skips a call to
1645 * skb_tx_hash and will put the skbs in the queue we expect on their
1646 * way down to the team driver.
1647 */
1648 u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1649
1650 /*
1651 * Save the original txq to restore before passing to the driver
1652 */
1653 qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1654
1655 if (unlikely(txq >= dev->real_num_tx_queues)) {
1656 do {
1657 txq -= dev->real_num_tx_queues;
1658 } while (txq >= dev->real_num_tx_queues);
1659 }
1660 return txq;
1661 }
1662
1663 static void team_change_rx_flags(struct net_device *dev, int change)
1664 {
1665 struct team *team = netdev_priv(dev);
1666 struct team_port *port;
1667 int inc;
1668
1669 rcu_read_lock();
1670 list_for_each_entry_rcu(port, &team->port_list, list) {
1671 if (change & IFF_PROMISC) {
1672 inc = dev->flags & IFF_PROMISC ? 1 : -1;
1673 dev_set_promiscuity(port->dev, inc);
1674 }
1675 if (change & IFF_ALLMULTI) {
1676 inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1677 dev_set_allmulti(port->dev, inc);
1678 }
1679 }
1680 rcu_read_unlock();
1681 }
1682
1683 static void team_set_rx_mode(struct net_device *dev)
1684 {
1685 struct team *team = netdev_priv(dev);
1686 struct team_port *port;
1687
1688 rcu_read_lock();
1689 list_for_each_entry_rcu(port, &team->port_list, list) {
1690 dev_uc_sync_multiple(port->dev, dev);
1691 dev_mc_sync_multiple(port->dev, dev);
1692 }
1693 rcu_read_unlock();
1694 }
1695
1696 static int team_set_mac_address(struct net_device *dev, void *p)
1697 {
1698 struct sockaddr *addr = p;
1699 struct team *team = netdev_priv(dev);
1700 struct team_port *port;
1701
1702 if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1703 return -EADDRNOTAVAIL;
1704 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1705 rcu_read_lock();
1706 list_for_each_entry_rcu(port, &team->port_list, list)
1707 if (team->ops.port_change_dev_addr)
1708 team->ops.port_change_dev_addr(team, port);
1709 rcu_read_unlock();
1710 return 0;
1711 }
1712
1713 static int team_change_mtu(struct net_device *dev, int new_mtu)
1714 {
1715 struct team *team = netdev_priv(dev);
1716 struct team_port *port;
1717 int err;
1718
1719 /*
1720 * Alhough this is reader, it's guarded by team lock. It's not possible
1721 * to traverse list in reverse under rcu_read_lock
1722 */
1723 mutex_lock(&team->lock);
1724 list_for_each_entry(port, &team->port_list, list) {
1725 err = dev_set_mtu(port->dev, new_mtu);
1726 if (err) {
1727 netdev_err(dev, "Device %s failed to change mtu",
1728 port->dev->name);
1729 goto unwind;
1730 }
1731 }
1732 mutex_unlock(&team->lock);
1733
1734 dev->mtu = new_mtu;
1735
1736 return 0;
1737
1738 unwind:
1739 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1740 dev_set_mtu(port->dev, dev->mtu);
1741 mutex_unlock(&team->lock);
1742
1743 return err;
1744 }
1745
1746 static struct rtnl_link_stats64 *
1747 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1748 {
1749 struct team *team = netdev_priv(dev);
1750 struct team_pcpu_stats *p;
1751 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1752 u32 rx_dropped = 0, tx_dropped = 0;
1753 unsigned int start;
1754 int i;
1755
1756 for_each_possible_cpu(i) {
1757 p = per_cpu_ptr(team->pcpu_stats, i);
1758 do {
1759 start = u64_stats_fetch_begin_bh(&p->syncp);
1760 rx_packets = p->rx_packets;
1761 rx_bytes = p->rx_bytes;
1762 rx_multicast = p->rx_multicast;
1763 tx_packets = p->tx_packets;
1764 tx_bytes = p->tx_bytes;
1765 } while (u64_stats_fetch_retry_bh(&p->syncp, start));
1766
1767 stats->rx_packets += rx_packets;
1768 stats->rx_bytes += rx_bytes;
1769 stats->multicast += rx_multicast;
1770 stats->tx_packets += tx_packets;
1771 stats->tx_bytes += tx_bytes;
1772 /*
1773 * rx_dropped & tx_dropped are u32, updated
1774 * without syncp protection.
1775 */
1776 rx_dropped += p->rx_dropped;
1777 tx_dropped += p->tx_dropped;
1778 }
1779 stats->rx_dropped = rx_dropped;
1780 stats->tx_dropped = tx_dropped;
1781 return stats;
1782 }
1783
1784 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1785 {
1786 struct team *team = netdev_priv(dev);
1787 struct team_port *port;
1788 int err;
1789
1790 /*
1791 * Alhough this is reader, it's guarded by team lock. It's not possible
1792 * to traverse list in reverse under rcu_read_lock
1793 */
1794 mutex_lock(&team->lock);
1795 list_for_each_entry(port, &team->port_list, list) {
1796 err = vlan_vid_add(port->dev, proto, vid);
1797 if (err)
1798 goto unwind;
1799 }
1800 mutex_unlock(&team->lock);
1801
1802 return 0;
1803
1804 unwind:
1805 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1806 vlan_vid_del(port->dev, proto, vid);
1807 mutex_unlock(&team->lock);
1808
1809 return err;
1810 }
1811
1812 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1813 {
1814 struct team *team = netdev_priv(dev);
1815 struct team_port *port;
1816
1817 rcu_read_lock();
1818 list_for_each_entry_rcu(port, &team->port_list, list)
1819 vlan_vid_del(port->dev, proto, vid);
1820 rcu_read_unlock();
1821
1822 return 0;
1823 }
1824
1825 #ifdef CONFIG_NET_POLL_CONTROLLER
1826 static void team_poll_controller(struct net_device *dev)
1827 {
1828 }
1829
1830 static void __team_netpoll_cleanup(struct team *team)
1831 {
1832 struct team_port *port;
1833
1834 list_for_each_entry(port, &team->port_list, list)
1835 team_port_disable_netpoll(port);
1836 }
1837
1838 static void team_netpoll_cleanup(struct net_device *dev)
1839 {
1840 struct team *team = netdev_priv(dev);
1841
1842 mutex_lock(&team->lock);
1843 __team_netpoll_cleanup(team);
1844 mutex_unlock(&team->lock);
1845 }
1846
1847 static int team_netpoll_setup(struct net_device *dev,
1848 struct netpoll_info *npifo, gfp_t gfp)
1849 {
1850 struct team *team = netdev_priv(dev);
1851 struct team_port *port;
1852 int err = 0;
1853
1854 mutex_lock(&team->lock);
1855 list_for_each_entry(port, &team->port_list, list) {
1856 err = team_port_enable_netpoll(team, port, gfp);
1857 if (err) {
1858 __team_netpoll_cleanup(team);
1859 break;
1860 }
1861 }
1862 mutex_unlock(&team->lock);
1863 return err;
1864 }
1865 #endif
1866
1867 static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
1868 {
1869 struct team *team = netdev_priv(dev);
1870 int err;
1871
1872 mutex_lock(&team->lock);
1873 err = team_port_add(team, port_dev);
1874 mutex_unlock(&team->lock);
1875 return err;
1876 }
1877
1878 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1879 {
1880 struct team *team = netdev_priv(dev);
1881 int err;
1882
1883 mutex_lock(&team->lock);
1884 err = team_port_del(team, port_dev);
1885 mutex_unlock(&team->lock);
1886 return err;
1887 }
1888
1889 static netdev_features_t team_fix_features(struct net_device *dev,
1890 netdev_features_t features)
1891 {
1892 struct team_port *port;
1893 struct team *team = netdev_priv(dev);
1894 netdev_features_t mask;
1895
1896 mask = features;
1897 features &= ~NETIF_F_ONE_FOR_ALL;
1898 features |= NETIF_F_ALL_FOR_ALL;
1899
1900 rcu_read_lock();
1901 list_for_each_entry_rcu(port, &team->port_list, list) {
1902 features = netdev_increment_features(features,
1903 port->dev->features,
1904 mask);
1905 }
1906 rcu_read_unlock();
1907 return features;
1908 }
1909
1910 static int team_change_carrier(struct net_device *dev, bool new_carrier)
1911 {
1912 struct team *team = netdev_priv(dev);
1913
1914 team->user_carrier_enabled = true;
1915
1916 if (new_carrier)
1917 netif_carrier_on(dev);
1918 else
1919 netif_carrier_off(dev);
1920 return 0;
1921 }
1922
1923 static const struct net_device_ops team_netdev_ops = {
1924 .ndo_init = team_init,
1925 .ndo_uninit = team_uninit,
1926 .ndo_open = team_open,
1927 .ndo_stop = team_close,
1928 .ndo_start_xmit = team_xmit,
1929 .ndo_select_queue = team_select_queue,
1930 .ndo_change_rx_flags = team_change_rx_flags,
1931 .ndo_set_rx_mode = team_set_rx_mode,
1932 .ndo_set_mac_address = team_set_mac_address,
1933 .ndo_change_mtu = team_change_mtu,
1934 .ndo_get_stats64 = team_get_stats64,
1935 .ndo_vlan_rx_add_vid = team_vlan_rx_add_vid,
1936 .ndo_vlan_rx_kill_vid = team_vlan_rx_kill_vid,
1937 #ifdef CONFIG_NET_POLL_CONTROLLER
1938 .ndo_poll_controller = team_poll_controller,
1939 .ndo_netpoll_setup = team_netpoll_setup,
1940 .ndo_netpoll_cleanup = team_netpoll_cleanup,
1941 #endif
1942 .ndo_add_slave = team_add_slave,
1943 .ndo_del_slave = team_del_slave,
1944 .ndo_fix_features = team_fix_features,
1945 .ndo_change_carrier = team_change_carrier,
1946 };
1947
1948 /***********************
1949 * ethtool interface
1950 ***********************/
1951
1952 static void team_ethtool_get_drvinfo(struct net_device *dev,
1953 struct ethtool_drvinfo *drvinfo)
1954 {
1955 strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
1956 strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
1957 }
1958
1959 static const struct ethtool_ops team_ethtool_ops = {
1960 .get_drvinfo = team_ethtool_get_drvinfo,
1961 .get_link = ethtool_op_get_link,
1962 };
1963
1964 /***********************
1965 * rt netlink interface
1966 ***********************/
1967
1968 static void team_setup_by_port(struct net_device *dev,
1969 struct net_device *port_dev)
1970 {
1971 dev->header_ops = port_dev->header_ops;
1972 dev->type = port_dev->type;
1973 dev->hard_header_len = port_dev->hard_header_len;
1974 dev->addr_len = port_dev->addr_len;
1975 dev->mtu = port_dev->mtu;
1976 memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
1977 eth_hw_addr_inherit(dev, port_dev);
1978 }
1979
1980 static int team_dev_type_check_change(struct net_device *dev,
1981 struct net_device *port_dev)
1982 {
1983 struct team *team = netdev_priv(dev);
1984 char *portname = port_dev->name;
1985 int err;
1986
1987 if (dev->type == port_dev->type)
1988 return 0;
1989 if (!list_empty(&team->port_list)) {
1990 netdev_err(dev, "Device %s is of different type\n", portname);
1991 return -EBUSY;
1992 }
1993 err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
1994 err = notifier_to_errno(err);
1995 if (err) {
1996 netdev_err(dev, "Refused to change device type\n");
1997 return err;
1998 }
1999 dev_uc_flush(dev);
2000 dev_mc_flush(dev);
2001 team_setup_by_port(dev, port_dev);
2002 call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2003 return 0;
2004 }
2005
2006 static void team_setup(struct net_device *dev)
2007 {
2008 ether_setup(dev);
2009
2010 dev->netdev_ops = &team_netdev_ops;
2011 dev->ethtool_ops = &team_ethtool_ops;
2012 dev->destructor = team_destructor;
2013 dev->tx_queue_len = 0;
2014 dev->flags |= IFF_MULTICAST;
2015 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2016
2017 /*
2018 * Indicate we support unicast address filtering. That way core won't
2019 * bring us to promisc mode in case a unicast addr is added.
2020 * Let this up to underlay drivers.
2021 */
2022 dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2023
2024 dev->features |= NETIF_F_LLTX;
2025 dev->features |= NETIF_F_GRO;
2026 dev->hw_features = TEAM_VLAN_FEATURES |
2027 NETIF_F_HW_VLAN_CTAG_TX |
2028 NETIF_F_HW_VLAN_CTAG_RX |
2029 NETIF_F_HW_VLAN_CTAG_FILTER;
2030
2031 dev->hw_features &= ~(NETIF_F_ALL_CSUM & ~NETIF_F_HW_CSUM);
2032 dev->features |= dev->hw_features;
2033 }
2034
2035 static int team_newlink(struct net *src_net, struct net_device *dev,
2036 struct nlattr *tb[], struct nlattr *data[])
2037 {
2038 int err;
2039
2040 if (tb[IFLA_ADDRESS] == NULL)
2041 eth_hw_addr_random(dev);
2042
2043 err = register_netdevice(dev);
2044 if (err)
2045 return err;
2046
2047 return 0;
2048 }
2049
2050 static int team_validate(struct nlattr *tb[], struct nlattr *data[])
2051 {
2052 if (tb[IFLA_ADDRESS]) {
2053 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2054 return -EINVAL;
2055 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2056 return -EADDRNOTAVAIL;
2057 }
2058 return 0;
2059 }
2060
2061 static unsigned int team_get_num_tx_queues(void)
2062 {
2063 return TEAM_DEFAULT_NUM_TX_QUEUES;
2064 }
2065
2066 static unsigned int team_get_num_rx_queues(void)
2067 {
2068 return TEAM_DEFAULT_NUM_RX_QUEUES;
2069 }
2070
2071 static struct rtnl_link_ops team_link_ops __read_mostly = {
2072 .kind = DRV_NAME,
2073 .priv_size = sizeof(struct team),
2074 .setup = team_setup,
2075 .newlink = team_newlink,
2076 .validate = team_validate,
2077 .get_num_tx_queues = team_get_num_tx_queues,
2078 .get_num_rx_queues = team_get_num_rx_queues,
2079 };
2080
2081
2082 /***********************************
2083 * Generic netlink custom interface
2084 ***********************************/
2085
2086 static struct genl_family team_nl_family = {
2087 .id = GENL_ID_GENERATE,
2088 .name = TEAM_GENL_NAME,
2089 .version = TEAM_GENL_VERSION,
2090 .maxattr = TEAM_ATTR_MAX,
2091 .netnsok = true,
2092 };
2093
2094 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2095 [TEAM_ATTR_UNSPEC] = { .type = NLA_UNSPEC, },
2096 [TEAM_ATTR_TEAM_IFINDEX] = { .type = NLA_U32 },
2097 [TEAM_ATTR_LIST_OPTION] = { .type = NLA_NESTED },
2098 [TEAM_ATTR_LIST_PORT] = { .type = NLA_NESTED },
2099 };
2100
2101 static const struct nla_policy
2102 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2103 [TEAM_ATTR_OPTION_UNSPEC] = { .type = NLA_UNSPEC, },
2104 [TEAM_ATTR_OPTION_NAME] = {
2105 .type = NLA_STRING,
2106 .len = TEAM_STRING_MAX_LEN,
2107 },
2108 [TEAM_ATTR_OPTION_CHANGED] = { .type = NLA_FLAG },
2109 [TEAM_ATTR_OPTION_TYPE] = { .type = NLA_U8 },
2110 [TEAM_ATTR_OPTION_DATA] = { .type = NLA_BINARY },
2111 };
2112
2113 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2114 {
2115 struct sk_buff *msg;
2116 void *hdr;
2117 int err;
2118
2119 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2120 if (!msg)
2121 return -ENOMEM;
2122
2123 hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2124 &team_nl_family, 0, TEAM_CMD_NOOP);
2125 if (!hdr) {
2126 err = -EMSGSIZE;
2127 goto err_msg_put;
2128 }
2129
2130 genlmsg_end(msg, hdr);
2131
2132 return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2133
2134 err_msg_put:
2135 nlmsg_free(msg);
2136
2137 return err;
2138 }
2139
2140 /*
2141 * Netlink cmd functions should be locked by following two functions.
2142 * Since dev gets held here, that ensures dev won't disappear in between.
2143 */
2144 static struct team *team_nl_team_get(struct genl_info *info)
2145 {
2146 struct net *net = genl_info_net(info);
2147 int ifindex;
2148 struct net_device *dev;
2149 struct team *team;
2150
2151 if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2152 return NULL;
2153
2154 ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2155 dev = dev_get_by_index(net, ifindex);
2156 if (!dev || dev->netdev_ops != &team_netdev_ops) {
2157 if (dev)
2158 dev_put(dev);
2159 return NULL;
2160 }
2161
2162 team = netdev_priv(dev);
2163 mutex_lock(&team->lock);
2164 return team;
2165 }
2166
2167 static void team_nl_team_put(struct team *team)
2168 {
2169 mutex_unlock(&team->lock);
2170 dev_put(team->dev);
2171 }
2172
2173 typedef int team_nl_send_func_t(struct sk_buff *skb,
2174 struct team *team, u32 portid);
2175
2176 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2177 {
2178 return genlmsg_unicast(dev_net(team->dev), skb, portid);
2179 }
2180
2181 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2182 struct team_option_inst *opt_inst)
2183 {
2184 struct nlattr *option_item;
2185 struct team_option *option = opt_inst->option;
2186 struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2187 struct team_gsetter_ctx ctx;
2188 int err;
2189
2190 ctx.info = opt_inst_info;
2191 err = team_option_get(team, opt_inst, &ctx);
2192 if (err)
2193 return err;
2194
2195 option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
2196 if (!option_item)
2197 return -EMSGSIZE;
2198
2199 if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2200 goto nest_cancel;
2201 if (opt_inst_info->port &&
2202 nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2203 opt_inst_info->port->dev->ifindex))
2204 goto nest_cancel;
2205 if (opt_inst->option->array_size &&
2206 nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2207 opt_inst_info->array_index))
2208 goto nest_cancel;
2209
2210 switch (option->type) {
2211 case TEAM_OPTION_TYPE_U32:
2212 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2213 goto nest_cancel;
2214 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2215 goto nest_cancel;
2216 break;
2217 case TEAM_OPTION_TYPE_STRING:
2218 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2219 goto nest_cancel;
2220 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2221 ctx.data.str_val))
2222 goto nest_cancel;
2223 break;
2224 case TEAM_OPTION_TYPE_BINARY:
2225 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2226 goto nest_cancel;
2227 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2228 ctx.data.bin_val.ptr))
2229 goto nest_cancel;
2230 break;
2231 case TEAM_OPTION_TYPE_BOOL:
2232 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2233 goto nest_cancel;
2234 if (ctx.data.bool_val &&
2235 nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2236 goto nest_cancel;
2237 break;
2238 case TEAM_OPTION_TYPE_S32:
2239 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2240 goto nest_cancel;
2241 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2242 goto nest_cancel;
2243 break;
2244 default:
2245 BUG();
2246 }
2247 if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2248 goto nest_cancel;
2249 if (opt_inst->changed) {
2250 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2251 goto nest_cancel;
2252 opt_inst->changed = false;
2253 }
2254 nla_nest_end(skb, option_item);
2255 return 0;
2256
2257 nest_cancel:
2258 nla_nest_cancel(skb, option_item);
2259 return -EMSGSIZE;
2260 }
2261
2262 static int __send_and_alloc_skb(struct sk_buff **pskb,
2263 struct team *team, u32 portid,
2264 team_nl_send_func_t *send_func)
2265 {
2266 int err;
2267
2268 if (*pskb) {
2269 err = send_func(*pskb, team, portid);
2270 if (err)
2271 return err;
2272 }
2273 *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2274 if (!*pskb)
2275 return -ENOMEM;
2276 return 0;
2277 }
2278
2279 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2280 int flags, team_nl_send_func_t *send_func,
2281 struct list_head *sel_opt_inst_list)
2282 {
2283 struct nlattr *option_list;
2284 struct nlmsghdr *nlh;
2285 void *hdr;
2286 struct team_option_inst *opt_inst;
2287 int err;
2288 struct sk_buff *skb = NULL;
2289 bool incomplete;
2290 int i;
2291
2292 opt_inst = list_first_entry(sel_opt_inst_list,
2293 struct team_option_inst, tmp_list);
2294
2295 start_again:
2296 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2297 if (err)
2298 return err;
2299
2300 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2301 TEAM_CMD_OPTIONS_GET);
2302 if (!hdr)
2303 return -EMSGSIZE;
2304
2305 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2306 goto nla_put_failure;
2307 option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2308 if (!option_list)
2309 goto nla_put_failure;
2310
2311 i = 0;
2312 incomplete = false;
2313 list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2314 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2315 if (err) {
2316 if (err == -EMSGSIZE) {
2317 if (!i)
2318 goto errout;
2319 incomplete = true;
2320 break;
2321 }
2322 goto errout;
2323 }
2324 i++;
2325 }
2326
2327 nla_nest_end(skb, option_list);
2328 genlmsg_end(skb, hdr);
2329 if (incomplete)
2330 goto start_again;
2331
2332 send_done:
2333 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2334 if (!nlh) {
2335 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2336 if (err)
2337 goto errout;
2338 goto send_done;
2339 }
2340
2341 return send_func(skb, team, portid);
2342
2343 nla_put_failure:
2344 err = -EMSGSIZE;
2345 errout:
2346 genlmsg_cancel(skb, hdr);
2347 nlmsg_free(skb);
2348 return err;
2349 }
2350
2351 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2352 {
2353 struct team *team;
2354 struct team_option_inst *opt_inst;
2355 int err;
2356 LIST_HEAD(sel_opt_inst_list);
2357
2358 team = team_nl_team_get(info);
2359 if (!team)
2360 return -EINVAL;
2361
2362 list_for_each_entry(opt_inst, &team->option_inst_list, list)
2363 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2364 err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2365 NLM_F_ACK, team_nl_send_unicast,
2366 &sel_opt_inst_list);
2367
2368 team_nl_team_put(team);
2369
2370 return err;
2371 }
2372
2373 static int team_nl_send_event_options_get(struct team *team,
2374 struct list_head *sel_opt_inst_list);
2375
2376 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2377 {
2378 struct team *team;
2379 int err = 0;
2380 int i;
2381 struct nlattr *nl_option;
2382 LIST_HEAD(opt_inst_list);
2383
2384 team = team_nl_team_get(info);
2385 if (!team)
2386 return -EINVAL;
2387
2388 err = -EINVAL;
2389 if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2390 err = -EINVAL;
2391 goto team_put;
2392 }
2393
2394 nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2395 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2396 struct nlattr *attr;
2397 struct nlattr *attr_data;
2398 enum team_option_type opt_type;
2399 int opt_port_ifindex = 0; /* != 0 for per-port options */
2400 u32 opt_array_index = 0;
2401 bool opt_is_array = false;
2402 struct team_option_inst *opt_inst;
2403 char *opt_name;
2404 bool opt_found = false;
2405
2406 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2407 err = -EINVAL;
2408 goto team_put;
2409 }
2410 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2411 nl_option, team_nl_option_policy);
2412 if (err)
2413 goto team_put;
2414 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2415 !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2416 err = -EINVAL;
2417 goto team_put;
2418 }
2419 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2420 case NLA_U32:
2421 opt_type = TEAM_OPTION_TYPE_U32;
2422 break;
2423 case NLA_STRING:
2424 opt_type = TEAM_OPTION_TYPE_STRING;
2425 break;
2426 case NLA_BINARY:
2427 opt_type = TEAM_OPTION_TYPE_BINARY;
2428 break;
2429 case NLA_FLAG:
2430 opt_type = TEAM_OPTION_TYPE_BOOL;
2431 break;
2432 case NLA_S32:
2433 opt_type = TEAM_OPTION_TYPE_S32;
2434 break;
2435 default:
2436 goto team_put;
2437 }
2438
2439 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2440 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2441 err = -EINVAL;
2442 goto team_put;
2443 }
2444
2445 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2446 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2447 if (attr)
2448 opt_port_ifindex = nla_get_u32(attr);
2449
2450 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2451 if (attr) {
2452 opt_is_array = true;
2453 opt_array_index = nla_get_u32(attr);
2454 }
2455
2456 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2457 struct team_option *option = opt_inst->option;
2458 struct team_gsetter_ctx ctx;
2459 struct team_option_inst_info *opt_inst_info;
2460 int tmp_ifindex;
2461
2462 opt_inst_info = &opt_inst->info;
2463 tmp_ifindex = opt_inst_info->port ?
2464 opt_inst_info->port->dev->ifindex : 0;
2465 if (option->type != opt_type ||
2466 strcmp(option->name, opt_name) ||
2467 tmp_ifindex != opt_port_ifindex ||
2468 (option->array_size && !opt_is_array) ||
2469 opt_inst_info->array_index != opt_array_index)
2470 continue;
2471 opt_found = true;
2472 ctx.info = opt_inst_info;
2473 switch (opt_type) {
2474 case TEAM_OPTION_TYPE_U32:
2475 ctx.data.u32_val = nla_get_u32(attr_data);
2476 break;
2477 case TEAM_OPTION_TYPE_STRING:
2478 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2479 err = -EINVAL;
2480 goto team_put;
2481 }
2482 ctx.data.str_val = nla_data(attr_data);
2483 break;
2484 case TEAM_OPTION_TYPE_BINARY:
2485 ctx.data.bin_val.len = nla_len(attr_data);
2486 ctx.data.bin_val.ptr = nla_data(attr_data);
2487 break;
2488 case TEAM_OPTION_TYPE_BOOL:
2489 ctx.data.bool_val = attr_data ? true : false;
2490 break;
2491 case TEAM_OPTION_TYPE_S32:
2492 ctx.data.s32_val = nla_get_s32(attr_data);
2493 break;
2494 default:
2495 BUG();
2496 }
2497 err = team_option_set(team, opt_inst, &ctx);
2498 if (err)
2499 goto team_put;
2500 opt_inst->changed = true;
2501 list_add(&opt_inst->tmp_list, &opt_inst_list);
2502 }
2503 if (!opt_found) {
2504 err = -ENOENT;
2505 goto team_put;
2506 }
2507 }
2508
2509 err = team_nl_send_event_options_get(team, &opt_inst_list);
2510
2511 team_put:
2512 team_nl_team_put(team);
2513
2514 return err;
2515 }
2516
2517 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2518 struct team_port *port)
2519 {
2520 struct nlattr *port_item;
2521
2522 port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2523 if (!port_item)
2524 goto nest_cancel;
2525 if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2526 goto nest_cancel;
2527 if (port->changed) {
2528 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2529 goto nest_cancel;
2530 port->changed = false;
2531 }
2532 if ((port->removed &&
2533 nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2534 (port->state.linkup &&
2535 nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2536 nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2537 nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2538 goto nest_cancel;
2539 nla_nest_end(skb, port_item);
2540 return 0;
2541
2542 nest_cancel:
2543 nla_nest_cancel(skb, port_item);
2544 return -EMSGSIZE;
2545 }
2546
2547 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2548 int flags, team_nl_send_func_t *send_func,
2549 struct team_port *one_port)
2550 {
2551 struct nlattr *port_list;
2552 struct nlmsghdr *nlh;
2553 void *hdr;
2554 struct team_port *port;
2555 int err;
2556 struct sk_buff *skb = NULL;
2557 bool incomplete;
2558 int i;
2559
2560 port = list_first_entry_or_null(&team->port_list,
2561 struct team_port, list);
2562
2563 start_again:
2564 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2565 if (err)
2566 return err;
2567
2568 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2569 TEAM_CMD_PORT_LIST_GET);
2570 if (!hdr)
2571 return -EMSGSIZE;
2572
2573 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2574 goto nla_put_failure;
2575 port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2576 if (!port_list)
2577 goto nla_put_failure;
2578
2579 i = 0;
2580 incomplete = false;
2581
2582 /* If one port is selected, called wants to send port list containing
2583 * only this port. Otherwise go through all listed ports and send all
2584 */
2585 if (one_port) {
2586 err = team_nl_fill_one_port_get(skb, one_port);
2587 if (err)
2588 goto errout;
2589 } else if (port) {
2590 list_for_each_entry_from(port, &team->port_list, list) {
2591 err = team_nl_fill_one_port_get(skb, port);
2592 if (err) {
2593 if (err == -EMSGSIZE) {
2594 if (!i)
2595 goto errout;
2596 incomplete = true;
2597 break;
2598 }
2599 goto errout;
2600 }
2601 i++;
2602 }
2603 }
2604
2605 nla_nest_end(skb, port_list);
2606 genlmsg_end(skb, hdr);
2607 if (incomplete)
2608 goto start_again;
2609
2610 send_done:
2611 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2612 if (!nlh) {
2613 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2614 if (err)
2615 goto errout;
2616 goto send_done;
2617 }
2618
2619 return send_func(skb, team, portid);
2620
2621 nla_put_failure:
2622 err = -EMSGSIZE;
2623 errout:
2624 genlmsg_cancel(skb, hdr);
2625 nlmsg_free(skb);
2626 return err;
2627 }
2628
2629 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2630 struct genl_info *info)
2631 {
2632 struct team *team;
2633 int err;
2634
2635 team = team_nl_team_get(info);
2636 if (!team)
2637 return -EINVAL;
2638
2639 err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2640 NLM_F_ACK, team_nl_send_unicast, NULL);
2641
2642 team_nl_team_put(team);
2643
2644 return err;
2645 }
2646
2647 static const struct genl_ops team_nl_ops[] = {
2648 {
2649 .cmd = TEAM_CMD_NOOP,
2650 .doit = team_nl_cmd_noop,
2651 .policy = team_nl_policy,
2652 },
2653 {
2654 .cmd = TEAM_CMD_OPTIONS_SET,
2655 .doit = team_nl_cmd_options_set,
2656 .policy = team_nl_policy,
2657 .flags = GENL_ADMIN_PERM,
2658 },
2659 {
2660 .cmd = TEAM_CMD_OPTIONS_GET,
2661 .doit = team_nl_cmd_options_get,
2662 .policy = team_nl_policy,
2663 .flags = GENL_ADMIN_PERM,
2664 },
2665 {
2666 .cmd = TEAM_CMD_PORT_LIST_GET,
2667 .doit = team_nl_cmd_port_list_get,
2668 .policy = team_nl_policy,
2669 .flags = GENL_ADMIN_PERM,
2670 },
2671 };
2672
2673 static struct genl_multicast_group team_change_event_mcgrp = {
2674 .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME,
2675 };
2676
2677 static int team_nl_send_multicast(struct sk_buff *skb,
2678 struct team *team, u32 portid)
2679 {
2680 return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2681 skb, 0, team_change_event_mcgrp.id,
2682 GFP_KERNEL);
2683 }
2684
2685 static int team_nl_send_event_options_get(struct team *team,
2686 struct list_head *sel_opt_inst_list)
2687 {
2688 return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2689 sel_opt_inst_list);
2690 }
2691
2692 static int team_nl_send_event_port_get(struct team *team,
2693 struct team_port *port)
2694 {
2695 return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2696 port);
2697 }
2698
2699 static int team_nl_init(void)
2700 {
2701 int err;
2702
2703 err = genl_register_family_with_ops(&team_nl_family, team_nl_ops);
2704 if (err)
2705 return err;
2706
2707 err = genl_register_mc_group(&team_nl_family, &team_change_event_mcgrp);
2708 if (err)
2709 goto err_change_event_grp_reg;
2710
2711 return 0;
2712
2713 err_change_event_grp_reg:
2714 genl_unregister_family(&team_nl_family);
2715
2716 return err;
2717 }
2718
2719 static void team_nl_fini(void)
2720 {
2721 genl_unregister_family(&team_nl_family);
2722 }
2723
2724
2725 /******************
2726 * Change checkers
2727 ******************/
2728
2729 static void __team_options_change_check(struct team *team)
2730 {
2731 int err;
2732 struct team_option_inst *opt_inst;
2733 LIST_HEAD(sel_opt_inst_list);
2734
2735 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2736 if (opt_inst->changed)
2737 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2738 }
2739 err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2740 if (err && err != -ESRCH)
2741 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2742 err);
2743 }
2744
2745 /* rtnl lock is held */
2746
2747 static void __team_port_change_send(struct team_port *port, bool linkup)
2748 {
2749 int err;
2750
2751 port->changed = true;
2752 port->state.linkup = linkup;
2753 team_refresh_port_linkup(port);
2754 if (linkup) {
2755 struct ethtool_cmd ecmd;
2756
2757 err = __ethtool_get_settings(port->dev, &ecmd);
2758 if (!err) {
2759 port->state.speed = ethtool_cmd_speed(&ecmd);
2760 port->state.duplex = ecmd.duplex;
2761 goto send_event;
2762 }
2763 }
2764 port->state.speed = 0;
2765 port->state.duplex = 0;
2766
2767 send_event:
2768 err = team_nl_send_event_port_get(port->team, port);
2769 if (err && err != -ESRCH)
2770 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2771 port->dev->name, err);
2772
2773 }
2774
2775 static void __team_carrier_check(struct team *team)
2776 {
2777 struct team_port *port;
2778 bool team_linkup;
2779
2780 if (team->user_carrier_enabled)
2781 return;
2782
2783 team_linkup = false;
2784 list_for_each_entry(port, &team->port_list, list) {
2785 if (port->linkup) {
2786 team_linkup = true;
2787 break;
2788 }
2789 }
2790
2791 if (team_linkup)
2792 netif_carrier_on(team->dev);
2793 else
2794 netif_carrier_off(team->dev);
2795 }
2796
2797 static void __team_port_change_check(struct team_port *port, bool linkup)
2798 {
2799 if (port->state.linkup != linkup)
2800 __team_port_change_send(port, linkup);
2801 __team_carrier_check(port->team);
2802 }
2803
2804 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2805 {
2806 __team_port_change_send(port, linkup);
2807 __team_carrier_check(port->team);
2808 }
2809
2810 static void __team_port_change_port_removed(struct team_port *port)
2811 {
2812 port->removed = true;
2813 __team_port_change_send(port, false);
2814 __team_carrier_check(port->team);
2815 }
2816
2817 static void team_port_change_check(struct team_port *port, bool linkup)
2818 {
2819 struct team *team = port->team;
2820
2821 mutex_lock(&team->lock);
2822 __team_port_change_check(port, linkup);
2823 mutex_unlock(&team->lock);
2824 }
2825
2826
2827 /************************************
2828 * Net device notifier event handler
2829 ************************************/
2830
2831 static int team_device_event(struct notifier_block *unused,
2832 unsigned long event, void *ptr)
2833 {
2834 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2835 struct team_port *port;
2836
2837 port = team_port_get_rtnl(dev);
2838 if (!port)
2839 return NOTIFY_DONE;
2840
2841 switch (event) {
2842 case NETDEV_UP:
2843 if (netif_carrier_ok(dev))
2844 team_port_change_check(port, true);
2845 case NETDEV_DOWN:
2846 team_port_change_check(port, false);
2847 case NETDEV_CHANGE:
2848 if (netif_running(port->dev))
2849 team_port_change_check(port,
2850 !!netif_carrier_ok(port->dev));
2851 break;
2852 case NETDEV_UNREGISTER:
2853 team_del_slave(port->team->dev, dev);
2854 break;
2855 case NETDEV_FEAT_CHANGE:
2856 team_compute_features(port->team);
2857 break;
2858 case NETDEV_CHANGEMTU:
2859 /* Forbid to change mtu of underlaying device */
2860 return NOTIFY_BAD;
2861 case NETDEV_PRE_TYPE_CHANGE:
2862 /* Forbid to change type of underlaying device */
2863 return NOTIFY_BAD;
2864 case NETDEV_RESEND_IGMP:
2865 /* Propagate to master device */
2866 call_netdevice_notifiers(event, port->team->dev);
2867 break;
2868 }
2869 return NOTIFY_DONE;
2870 }
2871
2872 static struct notifier_block team_notifier_block __read_mostly = {
2873 .notifier_call = team_device_event,
2874 };
2875
2876
2877 /***********************
2878 * Module init and exit
2879 ***********************/
2880
2881 static int __init team_module_init(void)
2882 {
2883 int err;
2884
2885 register_netdevice_notifier(&team_notifier_block);
2886
2887 err = rtnl_link_register(&team_link_ops);
2888 if (err)
2889 goto err_rtnl_reg;
2890
2891 err = team_nl_init();
2892 if (err)
2893 goto err_nl_init;
2894
2895 return 0;
2896
2897 err_nl_init:
2898 rtnl_link_unregister(&team_link_ops);
2899
2900 err_rtnl_reg:
2901 unregister_netdevice_notifier(&team_notifier_block);
2902
2903 return err;
2904 }
2905
2906 static void __exit team_module_exit(void)
2907 {
2908 team_nl_fini();
2909 rtnl_link_unregister(&team_link_ops);
2910 unregister_netdevice_notifier(&team_notifier_block);
2911 }
2912
2913 module_init(team_module_init);
2914 module_exit(team_module_exit);
2915
2916 MODULE_LICENSE("GPL v2");
2917 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
2918 MODULE_DESCRIPTION("Ethernet team device driver");
2919 MODULE_ALIAS_RTNL_LINK(DRV_NAME);
Linux kernel - Deliverables
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