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team: avoid possible underflow of count_pending value for notify_peers and mcast_rejoin
[linux/fpc-iii.git] / drivers / net / team / team.c
blob32efe8371ff8deb43d62804ecd0887163af5035f
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 int val;
633
634 team = container_of(work, struct team, notify_peers.dw.work);
635
636 if (!rtnl_trylock()) {
637 schedule_delayed_work(&team->notify_peers.dw, 0);
638 return;
639 }
640 val = atomic_dec_if_positive(&team->notify_peers.count_pending);
641 if (val < 0) {
642 rtnl_unlock();
643 return;
644 }
645 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, team->dev);
646 rtnl_unlock();
647 if (val)
648 schedule_delayed_work(&team->notify_peers.dw,
649 msecs_to_jiffies(team->notify_peers.interval));
650 }
651
652 static void team_notify_peers(struct team *team)
653 {
654 if (!team->notify_peers.count || !netif_running(team->dev))
655 return;
656 atomic_add(team->notify_peers.count, &team->notify_peers.count_pending);
657 schedule_delayed_work(&team->notify_peers.dw, 0);
658 }
659
660 static void team_notify_peers_init(struct team *team)
661 {
662 INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work);
663 }
664
665 static void team_notify_peers_fini(struct team *team)
666 {
667 cancel_delayed_work_sync(&team->notify_peers.dw);
668 }
669
670
671 /*******************************
672 * Send multicast group rejoins
673 *******************************/
674
675 static void team_mcast_rejoin_work(struct work_struct *work)
676 {
677 struct team *team;
678 int val;
679
680 team = container_of(work, struct team, mcast_rejoin.dw.work);
681
682 if (!rtnl_trylock()) {
683 schedule_delayed_work(&team->mcast_rejoin.dw, 0);
684 return;
685 }
686 val = atomic_dec_if_positive(&team->mcast_rejoin.count_pending);
687 if (val < 0) {
688 rtnl_unlock();
689 return;
690 }
691 call_netdevice_notifiers(NETDEV_RESEND_IGMP, team->dev);
692 rtnl_unlock();
693 if (val)
694 schedule_delayed_work(&team->mcast_rejoin.dw,
695 msecs_to_jiffies(team->mcast_rejoin.interval));
696 }
697
698 static void team_mcast_rejoin(struct team *team)
699 {
700 if (!team->mcast_rejoin.count || !netif_running(team->dev))
701 return;
702 atomic_add(team->mcast_rejoin.count, &team->mcast_rejoin.count_pending);
703 schedule_delayed_work(&team->mcast_rejoin.dw, 0);
704 }
705
706 static void team_mcast_rejoin_init(struct team *team)
707 {
708 INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work);
709 }
710
711 static void team_mcast_rejoin_fini(struct team *team)
712 {
713 cancel_delayed_work_sync(&team->mcast_rejoin.dw);
714 }
715
716
717 /************************
718 * Rx path frame handler
719 ************************/
720
721 /* note: already called with rcu_read_lock */
722 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
723 {
724 struct sk_buff *skb = *pskb;
725 struct team_port *port;
726 struct team *team;
727 rx_handler_result_t res;
728
729 skb = skb_share_check(skb, GFP_ATOMIC);
730 if (!skb)
731 return RX_HANDLER_CONSUMED;
732
733 *pskb = skb;
734
735 port = team_port_get_rcu(skb->dev);
736 team = port->team;
737 if (!team_port_enabled(port)) {
738 /* allow exact match delivery for disabled ports */
739 res = RX_HANDLER_EXACT;
740 } else {
741 res = team->ops.receive(team, port, skb);
742 }
743 if (res == RX_HANDLER_ANOTHER) {
744 struct team_pcpu_stats *pcpu_stats;
745
746 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
747 u64_stats_update_begin(&pcpu_stats->syncp);
748 pcpu_stats->rx_packets++;
749 pcpu_stats->rx_bytes += skb->len;
750 if (skb->pkt_type == PACKET_MULTICAST)
751 pcpu_stats->rx_multicast++;
752 u64_stats_update_end(&pcpu_stats->syncp);
753
754 skb->dev = team->dev;
755 } else {
756 this_cpu_inc(team->pcpu_stats->rx_dropped);
757 }
758
759 return res;
760 }
761
762
763 /*************************************
764 * Multiqueue Tx port select override
765 *************************************/
766
767 static int team_queue_override_init(struct team *team)
768 {
769 struct list_head *listarr;
770 unsigned int queue_cnt = team->dev->num_tx_queues - 1;
771 unsigned int i;
772
773 if (!queue_cnt)
774 return 0;
775 listarr = kmalloc(sizeof(struct list_head) * queue_cnt, GFP_KERNEL);
776 if (!listarr)
777 return -ENOMEM;
778 team->qom_lists = listarr;
779 for (i = 0; i < queue_cnt; i++)
780 INIT_LIST_HEAD(listarr++);
781 return 0;
782 }
783
784 static void team_queue_override_fini(struct team *team)
785 {
786 kfree(team->qom_lists);
787 }
788
789 static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
790 {
791 return &team->qom_lists[queue_id - 1];
792 }
793
794 /*
795 * note: already called with rcu_read_lock
796 */
797 static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
798 {
799 struct list_head *qom_list;
800 struct team_port *port;
801
802 if (!team->queue_override_enabled || !skb->queue_mapping)
803 return false;
804 qom_list = __team_get_qom_list(team, skb->queue_mapping);
805 list_for_each_entry_rcu(port, qom_list, qom_list) {
806 if (!team_dev_queue_xmit(team, port, skb))
807 return true;
808 }
809 return false;
810 }
811
812 static void __team_queue_override_port_del(struct team *team,
813 struct team_port *port)
814 {
815 if (!port->queue_id)
816 return;
817 list_del_rcu(&port->qom_list);
818 }
819
820 static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
821 struct team_port *cur)
822 {
823 if (port->priority < cur->priority)
824 return true;
825 if (port->priority > cur->priority)
826 return false;
827 if (port->index < cur->index)
828 return true;
829 return false;
830 }
831
832 static void __team_queue_override_port_add(struct team *team,
833 struct team_port *port)
834 {
835 struct team_port *cur;
836 struct list_head *qom_list;
837 struct list_head *node;
838
839 if (!port->queue_id)
840 return;
841 qom_list = __team_get_qom_list(team, port->queue_id);
842 node = qom_list;
843 list_for_each_entry(cur, qom_list, qom_list) {
844 if (team_queue_override_port_has_gt_prio_than(port, cur))
845 break;
846 node = &cur->qom_list;
847 }
848 list_add_tail_rcu(&port->qom_list, node);
849 }
850
851 static void __team_queue_override_enabled_check(struct team *team)
852 {
853 struct team_port *port;
854 bool enabled = false;
855
856 list_for_each_entry(port, &team->port_list, list) {
857 if (port->queue_id) {
858 enabled = true;
859 break;
860 }
861 }
862 if (enabled == team->queue_override_enabled)
863 return;
864 netdev_dbg(team->dev, "%s queue override\n",
865 enabled ? "Enabling" : "Disabling");
866 team->queue_override_enabled = enabled;
867 }
868
869 static void team_queue_override_port_prio_changed(struct team *team,
870 struct team_port *port)
871 {
872 if (!port->queue_id || team_port_enabled(port))
873 return;
874 __team_queue_override_port_del(team, port);
875 __team_queue_override_port_add(team, port);
876 __team_queue_override_enabled_check(team);
877 }
878
879 static void team_queue_override_port_change_queue_id(struct team *team,
880 struct team_port *port,
881 u16 new_queue_id)
882 {
883 if (team_port_enabled(port)) {
884 __team_queue_override_port_del(team, port);
885 port->queue_id = new_queue_id;
886 __team_queue_override_port_add(team, port);
887 __team_queue_override_enabled_check(team);
888 } else {
889 port->queue_id = new_queue_id;
890 }
891 }
892
893 static void team_queue_override_port_add(struct team *team,
894 struct team_port *port)
895 {
896 __team_queue_override_port_add(team, port);
897 __team_queue_override_enabled_check(team);
898 }
899
900 static void team_queue_override_port_del(struct team *team,
901 struct team_port *port)
902 {
903 __team_queue_override_port_del(team, port);
904 __team_queue_override_enabled_check(team);
905 }
906
907
908 /****************
909 * Port handling
910 ****************/
911
912 static bool team_port_find(const struct team *team,
913 const struct team_port *port)
914 {
915 struct team_port *cur;
916
917 list_for_each_entry(cur, &team->port_list, list)
918 if (cur == port)
919 return true;
920 return false;
921 }
922
923 /*
924 * Enable/disable port by adding to enabled port hashlist and setting
925 * port->index (Might be racy so reader could see incorrect ifindex when
926 * processing a flying packet, but that is not a problem). Write guarded
927 * by team->lock.
928 */
929 static void team_port_enable(struct team *team,
930 struct team_port *port)
931 {
932 if (team_port_enabled(port))
933 return;
934 port->index = team->en_port_count++;
935 hlist_add_head_rcu(&port->hlist,
936 team_port_index_hash(team, port->index));
937 team_adjust_ops(team);
938 team_queue_override_port_add(team, port);
939 if (team->ops.port_enabled)
940 team->ops.port_enabled(team, port);
941 team_notify_peers(team);
942 team_mcast_rejoin(team);
943 }
944
945 static void __reconstruct_port_hlist(struct team *team, int rm_index)
946 {
947 int i;
948 struct team_port *port;
949
950 for (i = rm_index + 1; i < team->en_port_count; i++) {
951 port = team_get_port_by_index(team, i);
952 hlist_del_rcu(&port->hlist);
953 port->index--;
954 hlist_add_head_rcu(&port->hlist,
955 team_port_index_hash(team, port->index));
956 }
957 }
958
959 static void team_port_disable(struct team *team,
960 struct team_port *port)
961 {
962 if (!team_port_enabled(port))
963 return;
964 if (team->ops.port_disabled)
965 team->ops.port_disabled(team, port);
966 hlist_del_rcu(&port->hlist);
967 __reconstruct_port_hlist(team, port->index);
968 port->index = -1;
969 team->en_port_count--;
970 team_queue_override_port_del(team, port);
971 team_adjust_ops(team);
972 team_notify_peers(team);
973 team_mcast_rejoin(team);
974 }
975
976 #define TEAM_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \
977 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
978 NETIF_F_HIGHDMA | NETIF_F_LRO)
979
980 static void __team_compute_features(struct team *team)
981 {
982 struct team_port *port;
983 u32 vlan_features = TEAM_VLAN_FEATURES;
984 unsigned short max_hard_header_len = ETH_HLEN;
985 unsigned int flags, dst_release_flag = IFF_XMIT_DST_RELEASE;
986
987 list_for_each_entry(port, &team->port_list, list) {
988 vlan_features = netdev_increment_features(vlan_features,
989 port->dev->vlan_features,
990 TEAM_VLAN_FEATURES);
991
992 dst_release_flag &= port->dev->priv_flags;
993 if (port->dev->hard_header_len > max_hard_header_len)
994 max_hard_header_len = port->dev->hard_header_len;
995 }
996
997 team->dev->vlan_features = vlan_features;
998 team->dev->hard_header_len = max_hard_header_len;
999
1000 flags = team->dev->priv_flags & ~IFF_XMIT_DST_RELEASE;
1001 team->dev->priv_flags = flags | dst_release_flag;
1002
1003 netdev_change_features(team->dev);
1004 }
1005
1006 static void team_compute_features(struct team *team)
1007 {
1008 mutex_lock(&team->lock);
1009 __team_compute_features(team);
1010 mutex_unlock(&team->lock);
1011 }
1012
1013 static int team_port_enter(struct team *team, struct team_port *port)
1014 {
1015 int err = 0;
1016
1017 dev_hold(team->dev);
1018 port->dev->priv_flags |= IFF_TEAM_PORT;
1019 if (team->ops.port_enter) {
1020 err = team->ops.port_enter(team, port);
1021 if (err) {
1022 netdev_err(team->dev, "Device %s failed to enter team mode\n",
1023 port->dev->name);
1024 goto err_port_enter;
1025 }
1026 }
1027
1028 return 0;
1029
1030 err_port_enter:
1031 port->dev->priv_flags &= ~IFF_TEAM_PORT;
1032 dev_put(team->dev);
1033
1034 return err;
1035 }
1036
1037 static void team_port_leave(struct team *team, struct team_port *port)
1038 {
1039 if (team->ops.port_leave)
1040 team->ops.port_leave(team, port);
1041 port->dev->priv_flags &= ~IFF_TEAM_PORT;
1042 dev_put(team->dev);
1043 }
1044
1045 #ifdef CONFIG_NET_POLL_CONTROLLER
1046 static int team_port_enable_netpoll(struct team *team, struct team_port *port,
1047 gfp_t gfp)
1048 {
1049 struct netpoll *np;
1050 int err;
1051
1052 if (!team->dev->npinfo)
1053 return 0;
1054
1055 np = kzalloc(sizeof(*np), gfp);
1056 if (!np)
1057 return -ENOMEM;
1058
1059 err = __netpoll_setup(np, port->dev, gfp);
1060 if (err) {
1061 kfree(np);
1062 return err;
1063 }
1064 port->np = np;
1065 return err;
1066 }
1067
1068 static void team_port_disable_netpoll(struct team_port *port)
1069 {
1070 struct netpoll *np = port->np;
1071
1072 if (!np)
1073 return;
1074 port->np = NULL;
1075
1076 /* Wait for transmitting packets to finish before freeing. */
1077 synchronize_rcu_bh();
1078 __netpoll_cleanup(np);
1079 kfree(np);
1080 }
1081 #else
1082 static int team_port_enable_netpoll(struct team *team, struct team_port *port,
1083 gfp_t gfp)
1084 {
1085 return 0;
1086 }
1087 static void team_port_disable_netpoll(struct team_port *port)
1088 {
1089 }
1090 #endif
1091
1092 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1093 static int team_dev_type_check_change(struct net_device *dev,
1094 struct net_device *port_dev);
1095
1096 static int team_port_add(struct team *team, struct net_device *port_dev)
1097 {
1098 struct net_device *dev = team->dev;
1099 struct team_port *port;
1100 char *portname = port_dev->name;
1101 int err;
1102
1103 if (port_dev->flags & IFF_LOOPBACK) {
1104 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1105 portname);
1106 return -EINVAL;
1107 }
1108
1109 if (team_port_exists(port_dev)) {
1110 netdev_err(dev, "Device %s is already a port "
1111 "of a team device\n", portname);
1112 return -EBUSY;
1113 }
1114
1115 if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1116 vlan_uses_dev(dev)) {
1117 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1118 portname);
1119 return -EPERM;
1120 }
1121
1122 err = team_dev_type_check_change(dev, port_dev);
1123 if (err)
1124 return err;
1125
1126 if (port_dev->flags & IFF_UP) {
1127 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1128 portname);
1129 return -EBUSY;
1130 }
1131
1132 port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1133 GFP_KERNEL);
1134 if (!port)
1135 return -ENOMEM;
1136
1137 port->dev = port_dev;
1138 port->team = team;
1139 INIT_LIST_HEAD(&port->qom_list);
1140
1141 port->orig.mtu = port_dev->mtu;
1142 err = dev_set_mtu(port_dev, dev->mtu);
1143 if (err) {
1144 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1145 goto err_set_mtu;
1146 }
1147
1148 memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1149
1150 err = team_port_enter(team, port);
1151 if (err) {
1152 netdev_err(dev, "Device %s failed to enter team mode\n",
1153 portname);
1154 goto err_port_enter;
1155 }
1156
1157 err = dev_open(port_dev);
1158 if (err) {
1159 netdev_dbg(dev, "Device %s opening failed\n",
1160 portname);
1161 goto err_dev_open;
1162 }
1163
1164 err = vlan_vids_add_by_dev(port_dev, dev);
1165 if (err) {
1166 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1167 portname);
1168 goto err_vids_add;
1169 }
1170
1171 err = team_port_enable_netpoll(team, port, GFP_KERNEL);
1172 if (err) {
1173 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1174 portname);
1175 goto err_enable_netpoll;
1176 }
1177
1178 err = netdev_master_upper_dev_link(port_dev, dev);
1179 if (err) {
1180 netdev_err(dev, "Device %s failed to set upper link\n",
1181 portname);
1182 goto err_set_upper_link;
1183 }
1184
1185 err = netdev_rx_handler_register(port_dev, team_handle_frame,
1186 port);
1187 if (err) {
1188 netdev_err(dev, "Device %s failed to register rx_handler\n",
1189 portname);
1190 goto err_handler_register;
1191 }
1192
1193 err = __team_option_inst_add_port(team, port);
1194 if (err) {
1195 netdev_err(dev, "Device %s failed to add per-port options\n",
1196 portname);
1197 goto err_option_port_add;
1198 }
1199
1200 port->index = -1;
1201 list_add_tail_rcu(&port->list, &team->port_list);
1202 team_port_enable(team, port);
1203 __team_compute_features(team);
1204 __team_port_change_port_added(port, !!netif_carrier_ok(port_dev));
1205 __team_options_change_check(team);
1206
1207 netdev_info(dev, "Port device %s added\n", portname);
1208
1209 return 0;
1210
1211 err_option_port_add:
1212 netdev_rx_handler_unregister(port_dev);
1213
1214 err_handler_register:
1215 netdev_upper_dev_unlink(port_dev, dev);
1216
1217 err_set_upper_link:
1218 team_port_disable_netpoll(port);
1219
1220 err_enable_netpoll:
1221 vlan_vids_del_by_dev(port_dev, dev);
1222
1223 err_vids_add:
1224 dev_close(port_dev);
1225
1226 err_dev_open:
1227 team_port_leave(team, port);
1228 team_port_set_orig_dev_addr(port);
1229
1230 err_port_enter:
1231 dev_set_mtu(port_dev, port->orig.mtu);
1232
1233 err_set_mtu:
1234 kfree(port);
1235
1236 return err;
1237 }
1238
1239 static void __team_port_change_port_removed(struct team_port *port);
1240
1241 static int team_port_del(struct team *team, struct net_device *port_dev)
1242 {
1243 struct net_device *dev = team->dev;
1244 struct team_port *port;
1245 char *portname = port_dev->name;
1246
1247 port = team_port_get_rtnl(port_dev);
1248 if (!port || !team_port_find(team, port)) {
1249 netdev_err(dev, "Device %s does not act as a port of this team\n",
1250 portname);
1251 return -ENOENT;
1252 }
1253
1254 team_port_disable(team, port);
1255 list_del_rcu(&port->list);
1256 netdev_rx_handler_unregister(port_dev);
1257 netdev_upper_dev_unlink(port_dev, dev);
1258 team_port_disable_netpoll(port);
1259 vlan_vids_del_by_dev(port_dev, dev);
1260 dev_uc_unsync(port_dev, dev);
1261 dev_mc_unsync(port_dev, dev);
1262 dev_close(port_dev);
1263 team_port_leave(team, port);
1264
1265 __team_option_inst_mark_removed_port(team, port);
1266 __team_options_change_check(team);
1267 __team_option_inst_del_port(team, port);
1268 __team_port_change_port_removed(port);
1269
1270 team_port_set_orig_dev_addr(port);
1271 dev_set_mtu(port_dev, port->orig.mtu);
1272 kfree_rcu(port, rcu);
1273 netdev_info(dev, "Port device %s removed\n", portname);
1274 __team_compute_features(team);
1275
1276 return 0;
1277 }
1278
1279
1280 /*****************
1281 * Net device ops
1282 *****************/
1283
1284 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1285 {
1286 ctx->data.str_val = team->mode->kind;
1287 return 0;
1288 }
1289
1290 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1291 {
1292 return team_change_mode(team, ctx->data.str_val);
1293 }
1294
1295 static int team_notify_peers_count_get(struct team *team,
1296 struct team_gsetter_ctx *ctx)
1297 {
1298 ctx->data.u32_val = team->notify_peers.count;
1299 return 0;
1300 }
1301
1302 static int team_notify_peers_count_set(struct team *team,
1303 struct team_gsetter_ctx *ctx)
1304 {
1305 team->notify_peers.count = ctx->data.u32_val;
1306 return 0;
1307 }
1308
1309 static int team_notify_peers_interval_get(struct team *team,
1310 struct team_gsetter_ctx *ctx)
1311 {
1312 ctx->data.u32_val = team->notify_peers.interval;
1313 return 0;
1314 }
1315
1316 static int team_notify_peers_interval_set(struct team *team,
1317 struct team_gsetter_ctx *ctx)
1318 {
1319 team->notify_peers.interval = ctx->data.u32_val;
1320 return 0;
1321 }
1322
1323 static int team_mcast_rejoin_count_get(struct team *team,
1324 struct team_gsetter_ctx *ctx)
1325 {
1326 ctx->data.u32_val = team->mcast_rejoin.count;
1327 return 0;
1328 }
1329
1330 static int team_mcast_rejoin_count_set(struct team *team,
1331 struct team_gsetter_ctx *ctx)
1332 {
1333 team->mcast_rejoin.count = ctx->data.u32_val;
1334 return 0;
1335 }
1336
1337 static int team_mcast_rejoin_interval_get(struct team *team,
1338 struct team_gsetter_ctx *ctx)
1339 {
1340 ctx->data.u32_val = team->mcast_rejoin.interval;
1341 return 0;
1342 }
1343
1344 static int team_mcast_rejoin_interval_set(struct team *team,
1345 struct team_gsetter_ctx *ctx)
1346 {
1347 team->mcast_rejoin.interval = ctx->data.u32_val;
1348 return 0;
1349 }
1350
1351 static int team_port_en_option_get(struct team *team,
1352 struct team_gsetter_ctx *ctx)
1353 {
1354 struct team_port *port = ctx->info->port;
1355
1356 ctx->data.bool_val = team_port_enabled(port);
1357 return 0;
1358 }
1359
1360 static int team_port_en_option_set(struct team *team,
1361 struct team_gsetter_ctx *ctx)
1362 {
1363 struct team_port *port = ctx->info->port;
1364
1365 if (ctx->data.bool_val)
1366 team_port_enable(team, port);
1367 else
1368 team_port_disable(team, port);
1369 return 0;
1370 }
1371
1372 static int team_user_linkup_option_get(struct team *team,
1373 struct team_gsetter_ctx *ctx)
1374 {
1375 struct team_port *port = ctx->info->port;
1376
1377 ctx->data.bool_val = port->user.linkup;
1378 return 0;
1379 }
1380
1381 static void __team_carrier_check(struct team *team);
1382
1383 static int team_user_linkup_option_set(struct team *team,
1384 struct team_gsetter_ctx *ctx)
1385 {
1386 struct team_port *port = ctx->info->port;
1387
1388 port->user.linkup = ctx->data.bool_val;
1389 team_refresh_port_linkup(port);
1390 __team_carrier_check(port->team);
1391 return 0;
1392 }
1393
1394 static int team_user_linkup_en_option_get(struct team *team,
1395 struct team_gsetter_ctx *ctx)
1396 {
1397 struct team_port *port = ctx->info->port;
1398
1399 ctx->data.bool_val = port->user.linkup_enabled;
1400 return 0;
1401 }
1402
1403 static int team_user_linkup_en_option_set(struct team *team,
1404 struct team_gsetter_ctx *ctx)
1405 {
1406 struct team_port *port = ctx->info->port;
1407
1408 port->user.linkup_enabled = ctx->data.bool_val;
1409 team_refresh_port_linkup(port);
1410 __team_carrier_check(port->team);
1411 return 0;
1412 }
1413
1414 static int team_priority_option_get(struct team *team,
1415 struct team_gsetter_ctx *ctx)
1416 {
1417 struct team_port *port = ctx->info->port;
1418
1419 ctx->data.s32_val = port->priority;
1420 return 0;
1421 }
1422
1423 static int team_priority_option_set(struct team *team,
1424 struct team_gsetter_ctx *ctx)
1425 {
1426 struct team_port *port = ctx->info->port;
1427 s32 priority = ctx->data.s32_val;
1428
1429 if (port->priority == priority)
1430 return 0;
1431 port->priority = priority;
1432 team_queue_override_port_prio_changed(team, port);
1433 return 0;
1434 }
1435
1436 static int team_queue_id_option_get(struct team *team,
1437 struct team_gsetter_ctx *ctx)
1438 {
1439 struct team_port *port = ctx->info->port;
1440
1441 ctx->data.u32_val = port->queue_id;
1442 return 0;
1443 }
1444
1445 static int team_queue_id_option_set(struct team *team,
1446 struct team_gsetter_ctx *ctx)
1447 {
1448 struct team_port *port = ctx->info->port;
1449 u16 new_queue_id = ctx->data.u32_val;
1450
1451 if (port->queue_id == new_queue_id)
1452 return 0;
1453 if (new_queue_id >= team->dev->real_num_tx_queues)
1454 return -EINVAL;
1455 team_queue_override_port_change_queue_id(team, port, new_queue_id);
1456 return 0;
1457 }
1458
1459 static const struct team_option team_options[] = {
1460 {
1461 .name = "mode",
1462 .type = TEAM_OPTION_TYPE_STRING,
1463 .getter = team_mode_option_get,
1464 .setter = team_mode_option_set,
1465 },
1466 {
1467 .name = "notify_peers_count",
1468 .type = TEAM_OPTION_TYPE_U32,
1469 .getter = team_notify_peers_count_get,
1470 .setter = team_notify_peers_count_set,
1471 },
1472 {
1473 .name = "notify_peers_interval",
1474 .type = TEAM_OPTION_TYPE_U32,
1475 .getter = team_notify_peers_interval_get,
1476 .setter = team_notify_peers_interval_set,
1477 },
1478 {
1479 .name = "mcast_rejoin_count",
1480 .type = TEAM_OPTION_TYPE_U32,
1481 .getter = team_mcast_rejoin_count_get,
1482 .setter = team_mcast_rejoin_count_set,
1483 },
1484 {
1485 .name = "mcast_rejoin_interval",
1486 .type = TEAM_OPTION_TYPE_U32,
1487 .getter = team_mcast_rejoin_interval_get,
1488 .setter = team_mcast_rejoin_interval_set,
1489 },
1490 {
1491 .name = "enabled",
1492 .type = TEAM_OPTION_TYPE_BOOL,
1493 .per_port = true,
1494 .getter = team_port_en_option_get,
1495 .setter = team_port_en_option_set,
1496 },
1497 {
1498 .name = "user_linkup",
1499 .type = TEAM_OPTION_TYPE_BOOL,
1500 .per_port = true,
1501 .getter = team_user_linkup_option_get,
1502 .setter = team_user_linkup_option_set,
1503 },
1504 {
1505 .name = "user_linkup_enabled",
1506 .type = TEAM_OPTION_TYPE_BOOL,
1507 .per_port = true,
1508 .getter = team_user_linkup_en_option_get,
1509 .setter = team_user_linkup_en_option_set,
1510 },
1511 {
1512 .name = "priority",
1513 .type = TEAM_OPTION_TYPE_S32,
1514 .per_port = true,
1515 .getter = team_priority_option_get,
1516 .setter = team_priority_option_set,
1517 },
1518 {
1519 .name = "queue_id",
1520 .type = TEAM_OPTION_TYPE_U32,
1521 .per_port = true,
1522 .getter = team_queue_id_option_get,
1523 .setter = team_queue_id_option_set,
1524 },
1525 };
1526
1527 static struct lock_class_key team_netdev_xmit_lock_key;
1528 static struct lock_class_key team_netdev_addr_lock_key;
1529 static struct lock_class_key team_tx_busylock_key;
1530
1531 static void team_set_lockdep_class_one(struct net_device *dev,
1532 struct netdev_queue *txq,
1533 void *unused)
1534 {
1535 lockdep_set_class(&txq->_xmit_lock, &team_netdev_xmit_lock_key);
1536 }
1537
1538 static void team_set_lockdep_class(struct net_device *dev)
1539 {
1540 lockdep_set_class(&dev->addr_list_lock, &team_netdev_addr_lock_key);
1541 netdev_for_each_tx_queue(dev, team_set_lockdep_class_one, NULL);
1542 dev->qdisc_tx_busylock = &team_tx_busylock_key;
1543 }
1544
1545 static int team_init(struct net_device *dev)
1546 {
1547 struct team *team = netdev_priv(dev);
1548 int i;
1549 int err;
1550
1551 team->dev = dev;
1552 mutex_init(&team->lock);
1553 team_set_no_mode(team);
1554
1555 team->pcpu_stats = alloc_percpu(struct team_pcpu_stats);
1556 if (!team->pcpu_stats)
1557 return -ENOMEM;
1558
1559 for_each_possible_cpu(i) {
1560 struct team_pcpu_stats *team_stats;
1561 team_stats = per_cpu_ptr(team->pcpu_stats, i);
1562 u64_stats_init(&team_stats->syncp);
1563 }
1564
1565 for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1566 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1567 INIT_LIST_HEAD(&team->port_list);
1568 err = team_queue_override_init(team);
1569 if (err)
1570 goto err_team_queue_override_init;
1571
1572 team_adjust_ops(team);
1573
1574 INIT_LIST_HEAD(&team->option_list);
1575 INIT_LIST_HEAD(&team->option_inst_list);
1576
1577 team_notify_peers_init(team);
1578 team_mcast_rejoin_init(team);
1579
1580 err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1581 if (err)
1582 goto err_options_register;
1583 netif_carrier_off(dev);
1584
1585 team_set_lockdep_class(dev);
1586
1587 return 0;
1588
1589 err_options_register:
1590 team_mcast_rejoin_fini(team);
1591 team_notify_peers_fini(team);
1592 team_queue_override_fini(team);
1593 err_team_queue_override_init:
1594 free_percpu(team->pcpu_stats);
1595
1596 return err;
1597 }
1598
1599 static void team_uninit(struct net_device *dev)
1600 {
1601 struct team *team = netdev_priv(dev);
1602 struct team_port *port;
1603 struct team_port *tmp;
1604
1605 mutex_lock(&team->lock);
1606 list_for_each_entry_safe(port, tmp, &team->port_list, list)
1607 team_port_del(team, port->dev);
1608
1609 __team_change_mode(team, NULL); /* cleanup */
1610 __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1611 team_mcast_rejoin_fini(team);
1612 team_notify_peers_fini(team);
1613 team_queue_override_fini(team);
1614 mutex_unlock(&team->lock);
1615 }
1616
1617 static void team_destructor(struct net_device *dev)
1618 {
1619 struct team *team = netdev_priv(dev);
1620
1621 free_percpu(team->pcpu_stats);
1622 free_netdev(dev);
1623 }
1624
1625 static int team_open(struct net_device *dev)
1626 {
1627 return 0;
1628 }
1629
1630 static int team_close(struct net_device *dev)
1631 {
1632 return 0;
1633 }
1634
1635 /*
1636 * note: already called with rcu_read_lock
1637 */
1638 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1639 {
1640 struct team *team = netdev_priv(dev);
1641 bool tx_success;
1642 unsigned int len = skb->len;
1643
1644 tx_success = team_queue_override_transmit(team, skb);
1645 if (!tx_success)
1646 tx_success = team->ops.transmit(team, skb);
1647 if (tx_success) {
1648 struct team_pcpu_stats *pcpu_stats;
1649
1650 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1651 u64_stats_update_begin(&pcpu_stats->syncp);
1652 pcpu_stats->tx_packets++;
1653 pcpu_stats->tx_bytes += len;
1654 u64_stats_update_end(&pcpu_stats->syncp);
1655 } else {
1656 this_cpu_inc(team->pcpu_stats->tx_dropped);
1657 }
1658
1659 return NETDEV_TX_OK;
1660 }
1661
1662 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1663 void *accel_priv, select_queue_fallback_t fallback)
1664 {
1665 /*
1666 * This helper function exists to help dev_pick_tx get the correct
1667 * destination queue. Using a helper function skips a call to
1668 * skb_tx_hash and will put the skbs in the queue we expect on their
1669 * way down to the team driver.
1670 */
1671 u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1672
1673 /*
1674 * Save the original txq to restore before passing to the driver
1675 */
1676 qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1677
1678 if (unlikely(txq >= dev->real_num_tx_queues)) {
1679 do {
1680 txq -= dev->real_num_tx_queues;
1681 } while (txq >= dev->real_num_tx_queues);
1682 }
1683 return txq;
1684 }
1685
1686 static void team_change_rx_flags(struct net_device *dev, int change)
1687 {
1688 struct team *team = netdev_priv(dev);
1689 struct team_port *port;
1690 int inc;
1691
1692 rcu_read_lock();
1693 list_for_each_entry_rcu(port, &team->port_list, list) {
1694 if (change & IFF_PROMISC) {
1695 inc = dev->flags & IFF_PROMISC ? 1 : -1;
1696 dev_set_promiscuity(port->dev, inc);
1697 }
1698 if (change & IFF_ALLMULTI) {
1699 inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1700 dev_set_allmulti(port->dev, inc);
1701 }
1702 }
1703 rcu_read_unlock();
1704 }
1705
1706 static void team_set_rx_mode(struct net_device *dev)
1707 {
1708 struct team *team = netdev_priv(dev);
1709 struct team_port *port;
1710
1711 rcu_read_lock();
1712 list_for_each_entry_rcu(port, &team->port_list, list) {
1713 dev_uc_sync_multiple(port->dev, dev);
1714 dev_mc_sync_multiple(port->dev, dev);
1715 }
1716 rcu_read_unlock();
1717 }
1718
1719 static int team_set_mac_address(struct net_device *dev, void *p)
1720 {
1721 struct sockaddr *addr = p;
1722 struct team *team = netdev_priv(dev);
1723 struct team_port *port;
1724
1725 if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1726 return -EADDRNOTAVAIL;
1727 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1728 rcu_read_lock();
1729 list_for_each_entry_rcu(port, &team->port_list, list)
1730 if (team->ops.port_change_dev_addr)
1731 team->ops.port_change_dev_addr(team, port);
1732 rcu_read_unlock();
1733 return 0;
1734 }
1735
1736 static int team_change_mtu(struct net_device *dev, int new_mtu)
1737 {
1738 struct team *team = netdev_priv(dev);
1739 struct team_port *port;
1740 int err;
1741
1742 /*
1743 * Alhough this is reader, it's guarded by team lock. It's not possible
1744 * to traverse list in reverse under rcu_read_lock
1745 */
1746 mutex_lock(&team->lock);
1747 team->port_mtu_change_allowed = true;
1748 list_for_each_entry(port, &team->port_list, list) {
1749 err = dev_set_mtu(port->dev, new_mtu);
1750 if (err) {
1751 netdev_err(dev, "Device %s failed to change mtu",
1752 port->dev->name);
1753 goto unwind;
1754 }
1755 }
1756 team->port_mtu_change_allowed = false;
1757 mutex_unlock(&team->lock);
1758
1759 dev->mtu = new_mtu;
1760
1761 return 0;
1762
1763 unwind:
1764 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1765 dev_set_mtu(port->dev, dev->mtu);
1766 team->port_mtu_change_allowed = false;
1767 mutex_unlock(&team->lock);
1768
1769 return err;
1770 }
1771
1772 static struct rtnl_link_stats64 *
1773 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1774 {
1775 struct team *team = netdev_priv(dev);
1776 struct team_pcpu_stats *p;
1777 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1778 u32 rx_dropped = 0, tx_dropped = 0;
1779 unsigned int start;
1780 int i;
1781
1782 for_each_possible_cpu(i) {
1783 p = per_cpu_ptr(team->pcpu_stats, i);
1784 do {
1785 start = u64_stats_fetch_begin_bh(&p->syncp);
1786 rx_packets = p->rx_packets;
1787 rx_bytes = p->rx_bytes;
1788 rx_multicast = p->rx_multicast;
1789 tx_packets = p->tx_packets;
1790 tx_bytes = p->tx_bytes;
1791 } while (u64_stats_fetch_retry_bh(&p->syncp, start));
1792
1793 stats->rx_packets += rx_packets;
1794 stats->rx_bytes += rx_bytes;
1795 stats->multicast += rx_multicast;
1796 stats->tx_packets += tx_packets;
1797 stats->tx_bytes += tx_bytes;
1798 /*
1799 * rx_dropped & tx_dropped are u32, updated
1800 * without syncp protection.
1801 */
1802 rx_dropped += p->rx_dropped;
1803 tx_dropped += p->tx_dropped;
1804 }
1805 stats->rx_dropped = rx_dropped;
1806 stats->tx_dropped = tx_dropped;
1807 return stats;
1808 }
1809
1810 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1811 {
1812 struct team *team = netdev_priv(dev);
1813 struct team_port *port;
1814 int err;
1815
1816 /*
1817 * Alhough this is reader, it's guarded by team lock. It's not possible
1818 * to traverse list in reverse under rcu_read_lock
1819 */
1820 mutex_lock(&team->lock);
1821 list_for_each_entry(port, &team->port_list, list) {
1822 err = vlan_vid_add(port->dev, proto, vid);
1823 if (err)
1824 goto unwind;
1825 }
1826 mutex_unlock(&team->lock);
1827
1828 return 0;
1829
1830 unwind:
1831 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1832 vlan_vid_del(port->dev, proto, vid);
1833 mutex_unlock(&team->lock);
1834
1835 return err;
1836 }
1837
1838 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1839 {
1840 struct team *team = netdev_priv(dev);
1841 struct team_port *port;
1842
1843 rcu_read_lock();
1844 list_for_each_entry_rcu(port, &team->port_list, list)
1845 vlan_vid_del(port->dev, proto, vid);
1846 rcu_read_unlock();
1847
1848 return 0;
1849 }
1850
1851 #ifdef CONFIG_NET_POLL_CONTROLLER
1852 static void team_poll_controller(struct net_device *dev)
1853 {
1854 }
1855
1856 static void __team_netpoll_cleanup(struct team *team)
1857 {
1858 struct team_port *port;
1859
1860 list_for_each_entry(port, &team->port_list, list)
1861 team_port_disable_netpoll(port);
1862 }
1863
1864 static void team_netpoll_cleanup(struct net_device *dev)
1865 {
1866 struct team *team = netdev_priv(dev);
1867
1868 mutex_lock(&team->lock);
1869 __team_netpoll_cleanup(team);
1870 mutex_unlock(&team->lock);
1871 }
1872
1873 static int team_netpoll_setup(struct net_device *dev,
1874 struct netpoll_info *npifo, gfp_t gfp)
1875 {
1876 struct team *team = netdev_priv(dev);
1877 struct team_port *port;
1878 int err = 0;
1879
1880 mutex_lock(&team->lock);
1881 list_for_each_entry(port, &team->port_list, list) {
1882 err = team_port_enable_netpoll(team, port, gfp);
1883 if (err) {
1884 __team_netpoll_cleanup(team);
1885 break;
1886 }
1887 }
1888 mutex_unlock(&team->lock);
1889 return err;
1890 }
1891 #endif
1892
1893 static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
1894 {
1895 struct team *team = netdev_priv(dev);
1896 int err;
1897
1898 mutex_lock(&team->lock);
1899 err = team_port_add(team, port_dev);
1900 mutex_unlock(&team->lock);
1901 return err;
1902 }
1903
1904 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1905 {
1906 struct team *team = netdev_priv(dev);
1907 int err;
1908
1909 mutex_lock(&team->lock);
1910 err = team_port_del(team, port_dev);
1911 mutex_unlock(&team->lock);
1912 return err;
1913 }
1914
1915 static netdev_features_t team_fix_features(struct net_device *dev,
1916 netdev_features_t features)
1917 {
1918 struct team_port *port;
1919 struct team *team = netdev_priv(dev);
1920 netdev_features_t mask;
1921
1922 mask = features;
1923 features &= ~NETIF_F_ONE_FOR_ALL;
1924 features |= NETIF_F_ALL_FOR_ALL;
1925
1926 rcu_read_lock();
1927 list_for_each_entry_rcu(port, &team->port_list, list) {
1928 features = netdev_increment_features(features,
1929 port->dev->features,
1930 mask);
1931 }
1932 rcu_read_unlock();
1933 return features;
1934 }
1935
1936 static int team_change_carrier(struct net_device *dev, bool new_carrier)
1937 {
1938 struct team *team = netdev_priv(dev);
1939
1940 team->user_carrier_enabled = true;
1941
1942 if (new_carrier)
1943 netif_carrier_on(dev);
1944 else
1945 netif_carrier_off(dev);
1946 return 0;
1947 }
1948
1949 static const struct net_device_ops team_netdev_ops = {
1950 .ndo_init = team_init,
1951 .ndo_uninit = team_uninit,
1952 .ndo_open = team_open,
1953 .ndo_stop = team_close,
1954 .ndo_start_xmit = team_xmit,
1955 .ndo_select_queue = team_select_queue,
1956 .ndo_change_rx_flags = team_change_rx_flags,
1957 .ndo_set_rx_mode = team_set_rx_mode,
1958 .ndo_set_mac_address = team_set_mac_address,
1959 .ndo_change_mtu = team_change_mtu,
1960 .ndo_get_stats64 = team_get_stats64,
1961 .ndo_vlan_rx_add_vid = team_vlan_rx_add_vid,
1962 .ndo_vlan_rx_kill_vid = team_vlan_rx_kill_vid,
1963 #ifdef CONFIG_NET_POLL_CONTROLLER
1964 .ndo_poll_controller = team_poll_controller,
1965 .ndo_netpoll_setup = team_netpoll_setup,
1966 .ndo_netpoll_cleanup = team_netpoll_cleanup,
1967 #endif
1968 .ndo_add_slave = team_add_slave,
1969 .ndo_del_slave = team_del_slave,
1970 .ndo_fix_features = team_fix_features,
1971 .ndo_change_carrier = team_change_carrier,
1972 };
1973
1974 /***********************
1975 * ethtool interface
1976 ***********************/
1977
1978 static void team_ethtool_get_drvinfo(struct net_device *dev,
1979 struct ethtool_drvinfo *drvinfo)
1980 {
1981 strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
1982 strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
1983 }
1984
1985 static const struct ethtool_ops team_ethtool_ops = {
1986 .get_drvinfo = team_ethtool_get_drvinfo,
1987 .get_link = ethtool_op_get_link,
1988 };
1989
1990 /***********************
1991 * rt netlink interface
1992 ***********************/
1993
1994 static void team_setup_by_port(struct net_device *dev,
1995 struct net_device *port_dev)
1996 {
1997 dev->header_ops = port_dev->header_ops;
1998 dev->type = port_dev->type;
1999 dev->hard_header_len = port_dev->hard_header_len;
2000 dev->addr_len = port_dev->addr_len;
2001 dev->mtu = port_dev->mtu;
2002 memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2003 eth_hw_addr_inherit(dev, port_dev);
2004 }
2005
2006 static int team_dev_type_check_change(struct net_device *dev,
2007 struct net_device *port_dev)
2008 {
2009 struct team *team = netdev_priv(dev);
2010 char *portname = port_dev->name;
2011 int err;
2012
2013 if (dev->type == port_dev->type)
2014 return 0;
2015 if (!list_empty(&team->port_list)) {
2016 netdev_err(dev, "Device %s is of different type\n", portname);
2017 return -EBUSY;
2018 }
2019 err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2020 err = notifier_to_errno(err);
2021 if (err) {
2022 netdev_err(dev, "Refused to change device type\n");
2023 return err;
2024 }
2025 dev_uc_flush(dev);
2026 dev_mc_flush(dev);
2027 team_setup_by_port(dev, port_dev);
2028 call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2029 return 0;
2030 }
2031
2032 static void team_setup(struct net_device *dev)
2033 {
2034 ether_setup(dev);
2035
2036 dev->netdev_ops = &team_netdev_ops;
2037 dev->ethtool_ops = &team_ethtool_ops;
2038 dev->destructor = team_destructor;
2039 dev->tx_queue_len = 0;
2040 dev->flags |= IFF_MULTICAST;
2041 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2042
2043 /*
2044 * Indicate we support unicast address filtering. That way core won't
2045 * bring us to promisc mode in case a unicast addr is added.
2046 * Let this up to underlay drivers.
2047 */
2048 dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2049
2050 dev->features |= NETIF_F_LLTX;
2051 dev->features |= NETIF_F_GRO;
2052
2053 /* Don't allow team devices to change network namespaces. */
2054 dev->features |= NETIF_F_NETNS_LOCAL;
2055
2056 dev->hw_features = TEAM_VLAN_FEATURES |
2057 NETIF_F_HW_VLAN_CTAG_TX |
2058 NETIF_F_HW_VLAN_CTAG_RX |
2059 NETIF_F_HW_VLAN_CTAG_FILTER;
2060
2061 dev->hw_features &= ~(NETIF_F_ALL_CSUM & ~NETIF_F_HW_CSUM);
2062 dev->features |= dev->hw_features;
2063 }
2064
2065 static int team_newlink(struct net *src_net, struct net_device *dev,
2066 struct nlattr *tb[], struct nlattr *data[])
2067 {
2068 int err;
2069
2070 if (tb[IFLA_ADDRESS] == NULL)
2071 eth_hw_addr_random(dev);
2072
2073 err = register_netdevice(dev);
2074 if (err)
2075 return err;
2076
2077 return 0;
2078 }
2079
2080 static int team_validate(struct nlattr *tb[], struct nlattr *data[])
2081 {
2082 if (tb[IFLA_ADDRESS]) {
2083 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2084 return -EINVAL;
2085 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2086 return -EADDRNOTAVAIL;
2087 }
2088 return 0;
2089 }
2090
2091 static unsigned int team_get_num_tx_queues(void)
2092 {
2093 return TEAM_DEFAULT_NUM_TX_QUEUES;
2094 }
2095
2096 static unsigned int team_get_num_rx_queues(void)
2097 {
2098 return TEAM_DEFAULT_NUM_RX_QUEUES;
2099 }
2100
2101 static struct rtnl_link_ops team_link_ops __read_mostly = {
2102 .kind = DRV_NAME,
2103 .priv_size = sizeof(struct team),
2104 .setup = team_setup,
2105 .newlink = team_newlink,
2106 .validate = team_validate,
2107 .get_num_tx_queues = team_get_num_tx_queues,
2108 .get_num_rx_queues = team_get_num_rx_queues,
2109 };
2110
2111
2112 /***********************************
2113 * Generic netlink custom interface
2114 ***********************************/
2115
2116 static struct genl_family team_nl_family = {
2117 .id = GENL_ID_GENERATE,
2118 .name = TEAM_GENL_NAME,
2119 .version = TEAM_GENL_VERSION,
2120 .maxattr = TEAM_ATTR_MAX,
2121 .netnsok = true,
2122 };
2123
2124 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2125 [TEAM_ATTR_UNSPEC] = { .type = NLA_UNSPEC, },
2126 [TEAM_ATTR_TEAM_IFINDEX] = { .type = NLA_U32 },
2127 [TEAM_ATTR_LIST_OPTION] = { .type = NLA_NESTED },
2128 [TEAM_ATTR_LIST_PORT] = { .type = NLA_NESTED },
2129 };
2130
2131 static const struct nla_policy
2132 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2133 [TEAM_ATTR_OPTION_UNSPEC] = { .type = NLA_UNSPEC, },
2134 [TEAM_ATTR_OPTION_NAME] = {
2135 .type = NLA_STRING,
2136 .len = TEAM_STRING_MAX_LEN,
2137 },
2138 [TEAM_ATTR_OPTION_CHANGED] = { .type = NLA_FLAG },
2139 [TEAM_ATTR_OPTION_TYPE] = { .type = NLA_U8 },
2140 [TEAM_ATTR_OPTION_DATA] = { .type = NLA_BINARY },
2141 };
2142
2143 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2144 {
2145 struct sk_buff *msg;
2146 void *hdr;
2147 int err;
2148
2149 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2150 if (!msg)
2151 return -ENOMEM;
2152
2153 hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2154 &team_nl_family, 0, TEAM_CMD_NOOP);
2155 if (!hdr) {
2156 err = -EMSGSIZE;
2157 goto err_msg_put;
2158 }
2159
2160 genlmsg_end(msg, hdr);
2161
2162 return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2163
2164 err_msg_put:
2165 nlmsg_free(msg);
2166
2167 return err;
2168 }
2169
2170 /*
2171 * Netlink cmd functions should be locked by following two functions.
2172 * Since dev gets held here, that ensures dev won't disappear in between.
2173 */
2174 static struct team *team_nl_team_get(struct genl_info *info)
2175 {
2176 struct net *net = genl_info_net(info);
2177 int ifindex;
2178 struct net_device *dev;
2179 struct team *team;
2180
2181 if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2182 return NULL;
2183
2184 ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2185 dev = dev_get_by_index(net, ifindex);
2186 if (!dev || dev->netdev_ops != &team_netdev_ops) {
2187 if (dev)
2188 dev_put(dev);
2189 return NULL;
2190 }
2191
2192 team = netdev_priv(dev);
2193 mutex_lock(&team->lock);
2194 return team;
2195 }
2196
2197 static void team_nl_team_put(struct team *team)
2198 {
2199 mutex_unlock(&team->lock);
2200 dev_put(team->dev);
2201 }
2202
2203 typedef int team_nl_send_func_t(struct sk_buff *skb,
2204 struct team *team, u32 portid);
2205
2206 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2207 {
2208 return genlmsg_unicast(dev_net(team->dev), skb, portid);
2209 }
2210
2211 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2212 struct team_option_inst *opt_inst)
2213 {
2214 struct nlattr *option_item;
2215 struct team_option *option = opt_inst->option;
2216 struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2217 struct team_gsetter_ctx ctx;
2218 int err;
2219
2220 ctx.info = opt_inst_info;
2221 err = team_option_get(team, opt_inst, &ctx);
2222 if (err)
2223 return err;
2224
2225 option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
2226 if (!option_item)
2227 return -EMSGSIZE;
2228
2229 if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2230 goto nest_cancel;
2231 if (opt_inst_info->port &&
2232 nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2233 opt_inst_info->port->dev->ifindex))
2234 goto nest_cancel;
2235 if (opt_inst->option->array_size &&
2236 nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2237 opt_inst_info->array_index))
2238 goto nest_cancel;
2239
2240 switch (option->type) {
2241 case TEAM_OPTION_TYPE_U32:
2242 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2243 goto nest_cancel;
2244 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2245 goto nest_cancel;
2246 break;
2247 case TEAM_OPTION_TYPE_STRING:
2248 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2249 goto nest_cancel;
2250 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2251 ctx.data.str_val))
2252 goto nest_cancel;
2253 break;
2254 case TEAM_OPTION_TYPE_BINARY:
2255 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2256 goto nest_cancel;
2257 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2258 ctx.data.bin_val.ptr))
2259 goto nest_cancel;
2260 break;
2261 case TEAM_OPTION_TYPE_BOOL:
2262 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2263 goto nest_cancel;
2264 if (ctx.data.bool_val &&
2265 nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2266 goto nest_cancel;
2267 break;
2268 case TEAM_OPTION_TYPE_S32:
2269 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2270 goto nest_cancel;
2271 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2272 goto nest_cancel;
2273 break;
2274 default:
2275 BUG();
2276 }
2277 if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2278 goto nest_cancel;
2279 if (opt_inst->changed) {
2280 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2281 goto nest_cancel;
2282 opt_inst->changed = false;
2283 }
2284 nla_nest_end(skb, option_item);
2285 return 0;
2286
2287 nest_cancel:
2288 nla_nest_cancel(skb, option_item);
2289 return -EMSGSIZE;
2290 }
2291
2292 static int __send_and_alloc_skb(struct sk_buff **pskb,
2293 struct team *team, u32 portid,
2294 team_nl_send_func_t *send_func)
2295 {
2296 int err;
2297
2298 if (*pskb) {
2299 err = send_func(*pskb, team, portid);
2300 if (err)
2301 return err;
2302 }
2303 *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2304 if (!*pskb)
2305 return -ENOMEM;
2306 return 0;
2307 }
2308
2309 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2310 int flags, team_nl_send_func_t *send_func,
2311 struct list_head *sel_opt_inst_list)
2312 {
2313 struct nlattr *option_list;
2314 struct nlmsghdr *nlh;
2315 void *hdr;
2316 struct team_option_inst *opt_inst;
2317 int err;
2318 struct sk_buff *skb = NULL;
2319 bool incomplete;
2320 int i;
2321
2322 opt_inst = list_first_entry(sel_opt_inst_list,
2323 struct team_option_inst, tmp_list);
2324
2325 start_again:
2326 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2327 if (err)
2328 return err;
2329
2330 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2331 TEAM_CMD_OPTIONS_GET);
2332 if (!hdr)
2333 return -EMSGSIZE;
2334
2335 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2336 goto nla_put_failure;
2337 option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2338 if (!option_list)
2339 goto nla_put_failure;
2340
2341 i = 0;
2342 incomplete = false;
2343 list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2344 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2345 if (err) {
2346 if (err == -EMSGSIZE) {
2347 if (!i)
2348 goto errout;
2349 incomplete = true;
2350 break;
2351 }
2352 goto errout;
2353 }
2354 i++;
2355 }
2356
2357 nla_nest_end(skb, option_list);
2358 genlmsg_end(skb, hdr);
2359 if (incomplete)
2360 goto start_again;
2361
2362 send_done:
2363 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2364 if (!nlh) {
2365 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2366 if (err)
2367 goto errout;
2368 goto send_done;
2369 }
2370
2371 return send_func(skb, team, portid);
2372
2373 nla_put_failure:
2374 err = -EMSGSIZE;
2375 errout:
2376 genlmsg_cancel(skb, hdr);
2377 nlmsg_free(skb);
2378 return err;
2379 }
2380
2381 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2382 {
2383 struct team *team;
2384 struct team_option_inst *opt_inst;
2385 int err;
2386 LIST_HEAD(sel_opt_inst_list);
2387
2388 team = team_nl_team_get(info);
2389 if (!team)
2390 return -EINVAL;
2391
2392 list_for_each_entry(opt_inst, &team->option_inst_list, list)
2393 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2394 err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2395 NLM_F_ACK, team_nl_send_unicast,
2396 &sel_opt_inst_list);
2397
2398 team_nl_team_put(team);
2399
2400 return err;
2401 }
2402
2403 static int team_nl_send_event_options_get(struct team *team,
2404 struct list_head *sel_opt_inst_list);
2405
2406 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2407 {
2408 struct team *team;
2409 int err = 0;
2410 int i;
2411 struct nlattr *nl_option;
2412 LIST_HEAD(opt_inst_list);
2413
2414 team = team_nl_team_get(info);
2415 if (!team)
2416 return -EINVAL;
2417
2418 err = -EINVAL;
2419 if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2420 err = -EINVAL;
2421 goto team_put;
2422 }
2423
2424 nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2425 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2426 struct nlattr *attr;
2427 struct nlattr *attr_data;
2428 enum team_option_type opt_type;
2429 int opt_port_ifindex = 0; /* != 0 for per-port options */
2430 u32 opt_array_index = 0;
2431 bool opt_is_array = false;
2432 struct team_option_inst *opt_inst;
2433 char *opt_name;
2434 bool opt_found = false;
2435
2436 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2437 err = -EINVAL;
2438 goto team_put;
2439 }
2440 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2441 nl_option, team_nl_option_policy);
2442 if (err)
2443 goto team_put;
2444 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2445 !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2446 err = -EINVAL;
2447 goto team_put;
2448 }
2449 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2450 case NLA_U32:
2451 opt_type = TEAM_OPTION_TYPE_U32;
2452 break;
2453 case NLA_STRING:
2454 opt_type = TEAM_OPTION_TYPE_STRING;
2455 break;
2456 case NLA_BINARY:
2457 opt_type = TEAM_OPTION_TYPE_BINARY;
2458 break;
2459 case NLA_FLAG:
2460 opt_type = TEAM_OPTION_TYPE_BOOL;
2461 break;
2462 case NLA_S32:
2463 opt_type = TEAM_OPTION_TYPE_S32;
2464 break;
2465 default:
2466 goto team_put;
2467 }
2468
2469 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2470 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2471 err = -EINVAL;
2472 goto team_put;
2473 }
2474
2475 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2476 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2477 if (attr)
2478 opt_port_ifindex = nla_get_u32(attr);
2479
2480 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2481 if (attr) {
2482 opt_is_array = true;
2483 opt_array_index = nla_get_u32(attr);
2484 }
2485
2486 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2487 struct team_option *option = opt_inst->option;
2488 struct team_gsetter_ctx ctx;
2489 struct team_option_inst_info *opt_inst_info;
2490 int tmp_ifindex;
2491
2492 opt_inst_info = &opt_inst->info;
2493 tmp_ifindex = opt_inst_info->port ?
2494 opt_inst_info->port->dev->ifindex : 0;
2495 if (option->type != opt_type ||
2496 strcmp(option->name, opt_name) ||
2497 tmp_ifindex != opt_port_ifindex ||
2498 (option->array_size && !opt_is_array) ||
2499 opt_inst_info->array_index != opt_array_index)
2500 continue;
2501 opt_found = true;
2502 ctx.info = opt_inst_info;
2503 switch (opt_type) {
2504 case TEAM_OPTION_TYPE_U32:
2505 ctx.data.u32_val = nla_get_u32(attr_data);
2506 break;
2507 case TEAM_OPTION_TYPE_STRING:
2508 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2509 err = -EINVAL;
2510 goto team_put;
2511 }
2512 ctx.data.str_val = nla_data(attr_data);
2513 break;
2514 case TEAM_OPTION_TYPE_BINARY:
2515 ctx.data.bin_val.len = nla_len(attr_data);
2516 ctx.data.bin_val.ptr = nla_data(attr_data);
2517 break;
2518 case TEAM_OPTION_TYPE_BOOL:
2519 ctx.data.bool_val = attr_data ? true : false;
2520 break;
2521 case TEAM_OPTION_TYPE_S32:
2522 ctx.data.s32_val = nla_get_s32(attr_data);
2523 break;
2524 default:
2525 BUG();
2526 }
2527 err = team_option_set(team, opt_inst, &ctx);
2528 if (err)
2529 goto team_put;
2530 opt_inst->changed = true;
2531 list_add(&opt_inst->tmp_list, &opt_inst_list);
2532 }
2533 if (!opt_found) {
2534 err = -ENOENT;
2535 goto team_put;
2536 }
2537 }
2538
2539 err = team_nl_send_event_options_get(team, &opt_inst_list);
2540
2541 team_put:
2542 team_nl_team_put(team);
2543
2544 return err;
2545 }
2546
2547 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2548 struct team_port *port)
2549 {
2550 struct nlattr *port_item;
2551
2552 port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2553 if (!port_item)
2554 goto nest_cancel;
2555 if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2556 goto nest_cancel;
2557 if (port->changed) {
2558 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2559 goto nest_cancel;
2560 port->changed = false;
2561 }
2562 if ((port->removed &&
2563 nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2564 (port->state.linkup &&
2565 nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2566 nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2567 nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2568 goto nest_cancel;
2569 nla_nest_end(skb, port_item);
2570 return 0;
2571
2572 nest_cancel:
2573 nla_nest_cancel(skb, port_item);
2574 return -EMSGSIZE;
2575 }
2576
2577 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2578 int flags, team_nl_send_func_t *send_func,
2579 struct team_port *one_port)
2580 {
2581 struct nlattr *port_list;
2582 struct nlmsghdr *nlh;
2583 void *hdr;
2584 struct team_port *port;
2585 int err;
2586 struct sk_buff *skb = NULL;
2587 bool incomplete;
2588 int i;
2589
2590 port = list_first_entry_or_null(&team->port_list,
2591 struct team_port, list);
2592
2593 start_again:
2594 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2595 if (err)
2596 return err;
2597
2598 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2599 TEAM_CMD_PORT_LIST_GET);
2600 if (!hdr)
2601 return -EMSGSIZE;
2602
2603 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2604 goto nla_put_failure;
2605 port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2606 if (!port_list)
2607 goto nla_put_failure;
2608
2609 i = 0;
2610 incomplete = false;
2611
2612 /* If one port is selected, called wants to send port list containing
2613 * only this port. Otherwise go through all listed ports and send all
2614 */
2615 if (one_port) {
2616 err = team_nl_fill_one_port_get(skb, one_port);
2617 if (err)
2618 goto errout;
2619 } else if (port) {
2620 list_for_each_entry_from(port, &team->port_list, list) {
2621 err = team_nl_fill_one_port_get(skb, port);
2622 if (err) {
2623 if (err == -EMSGSIZE) {
2624 if (!i)
2625 goto errout;
2626 incomplete = true;
2627 break;
2628 }
2629 goto errout;
2630 }
2631 i++;
2632 }
2633 }
2634
2635 nla_nest_end(skb, port_list);
2636 genlmsg_end(skb, hdr);
2637 if (incomplete)
2638 goto start_again;
2639
2640 send_done:
2641 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2642 if (!nlh) {
2643 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2644 if (err)
2645 goto errout;
2646 goto send_done;
2647 }
2648
2649 return send_func(skb, team, portid);
2650
2651 nla_put_failure:
2652 err = -EMSGSIZE;
2653 errout:
2654 genlmsg_cancel(skb, hdr);
2655 nlmsg_free(skb);
2656 return err;
2657 }
2658
2659 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2660 struct genl_info *info)
2661 {
2662 struct team *team;
2663 int err;
2664
2665 team = team_nl_team_get(info);
2666 if (!team)
2667 return -EINVAL;
2668
2669 err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2670 NLM_F_ACK, team_nl_send_unicast, NULL);
2671
2672 team_nl_team_put(team);
2673
2674 return err;
2675 }
2676
2677 static const struct genl_ops team_nl_ops[] = {
2678 {
2679 .cmd = TEAM_CMD_NOOP,
2680 .doit = team_nl_cmd_noop,
2681 .policy = team_nl_policy,
2682 },
2683 {
2684 .cmd = TEAM_CMD_OPTIONS_SET,
2685 .doit = team_nl_cmd_options_set,
2686 .policy = team_nl_policy,
2687 .flags = GENL_ADMIN_PERM,
2688 },
2689 {
2690 .cmd = TEAM_CMD_OPTIONS_GET,
2691 .doit = team_nl_cmd_options_get,
2692 .policy = team_nl_policy,
2693 .flags = GENL_ADMIN_PERM,
2694 },
2695 {
2696 .cmd = TEAM_CMD_PORT_LIST_GET,
2697 .doit = team_nl_cmd_port_list_get,
2698 .policy = team_nl_policy,
2699 .flags = GENL_ADMIN_PERM,
2700 },
2701 };
2702
2703 static const struct genl_multicast_group team_nl_mcgrps[] = {
2704 { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2705 };
2706
2707 static int team_nl_send_multicast(struct sk_buff *skb,
2708 struct team *team, u32 portid)
2709 {
2710 return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2711 skb, 0, 0, GFP_KERNEL);
2712 }
2713
2714 static int team_nl_send_event_options_get(struct team *team,
2715 struct list_head *sel_opt_inst_list)
2716 {
2717 return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2718 sel_opt_inst_list);
2719 }
2720
2721 static int team_nl_send_event_port_get(struct team *team,
2722 struct team_port *port)
2723 {
2724 return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2725 port);
2726 }
2727
2728 static int team_nl_init(void)
2729 {
2730 return genl_register_family_with_ops_groups(&team_nl_family, team_nl_ops,
2731 team_nl_mcgrps);
2732 }
2733
2734 static void team_nl_fini(void)
2735 {
2736 genl_unregister_family(&team_nl_family);
2737 }
2738
2739
2740 /******************
2741 * Change checkers
2742 ******************/
2743
2744 static void __team_options_change_check(struct team *team)
2745 {
2746 int err;
2747 struct team_option_inst *opt_inst;
2748 LIST_HEAD(sel_opt_inst_list);
2749
2750 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2751 if (opt_inst->changed)
2752 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2753 }
2754 err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2755 if (err && err != -ESRCH)
2756 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2757 err);
2758 }
2759
2760 /* rtnl lock is held */
2761
2762 static void __team_port_change_send(struct team_port *port, bool linkup)
2763 {
2764 int err;
2765
2766 port->changed = true;
2767 port->state.linkup = linkup;
2768 team_refresh_port_linkup(port);
2769 if (linkup) {
2770 struct ethtool_cmd ecmd;
2771
2772 err = __ethtool_get_settings(port->dev, &ecmd);
2773 if (!err) {
2774 port->state.speed = ethtool_cmd_speed(&ecmd);
2775 port->state.duplex = ecmd.duplex;
2776 goto send_event;
2777 }
2778 }
2779 port->state.speed = 0;
2780 port->state.duplex = 0;
2781
2782 send_event:
2783 err = team_nl_send_event_port_get(port->team, port);
2784 if (err && err != -ESRCH)
2785 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2786 port->dev->name, err);
2787
2788 }
2789
2790 static void __team_carrier_check(struct team *team)
2791 {
2792 struct team_port *port;
2793 bool team_linkup;
2794
2795 if (team->user_carrier_enabled)
2796 return;
2797
2798 team_linkup = false;
2799 list_for_each_entry(port, &team->port_list, list) {
2800 if (port->linkup) {
2801 team_linkup = true;
2802 break;
2803 }
2804 }
2805
2806 if (team_linkup)
2807 netif_carrier_on(team->dev);
2808 else
2809 netif_carrier_off(team->dev);
2810 }
2811
2812 static void __team_port_change_check(struct team_port *port, bool linkup)
2813 {
2814 if (port->state.linkup != linkup)
2815 __team_port_change_send(port, linkup);
2816 __team_carrier_check(port->team);
2817 }
2818
2819 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2820 {
2821 __team_port_change_send(port, linkup);
2822 __team_carrier_check(port->team);
2823 }
2824
2825 static void __team_port_change_port_removed(struct team_port *port)
2826 {
2827 port->removed = true;
2828 __team_port_change_send(port, false);
2829 __team_carrier_check(port->team);
2830 }
2831
2832 static void team_port_change_check(struct team_port *port, bool linkup)
2833 {
2834 struct team *team = port->team;
2835
2836 mutex_lock(&team->lock);
2837 __team_port_change_check(port, linkup);
2838 mutex_unlock(&team->lock);
2839 }
2840
2841
2842 /************************************
2843 * Net device notifier event handler
2844 ************************************/
2845
2846 static int team_device_event(struct notifier_block *unused,
2847 unsigned long event, void *ptr)
2848 {
2849 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2850 struct team_port *port;
2851
2852 port = team_port_get_rtnl(dev);
2853 if (!port)
2854 return NOTIFY_DONE;
2855
2856 switch (event) {
2857 case NETDEV_UP:
2858 if (netif_carrier_ok(dev))
2859 team_port_change_check(port, true);
2860 case NETDEV_DOWN:
2861 team_port_change_check(port, false);
2862 case NETDEV_CHANGE:
2863 if (netif_running(port->dev))
2864 team_port_change_check(port,
2865 !!netif_carrier_ok(port->dev));
2866 break;
2867 case NETDEV_UNREGISTER:
2868 team_del_slave(port->team->dev, dev);
2869 break;
2870 case NETDEV_FEAT_CHANGE:
2871 team_compute_features(port->team);
2872 break;
2873 case NETDEV_PRECHANGEMTU:
2874 /* Forbid to change mtu of underlaying device */
2875 if (!port->team->port_mtu_change_allowed)
2876 return NOTIFY_BAD;
2877 break;
2878 case NETDEV_PRE_TYPE_CHANGE:
2879 /* Forbid to change type of underlaying device */
2880 return NOTIFY_BAD;
2881 case NETDEV_RESEND_IGMP:
2882 /* Propagate to master device */
2883 call_netdevice_notifiers(event, port->team->dev);
2884 break;
2885 }
2886 return NOTIFY_DONE;
2887 }
2888
2889 static struct notifier_block team_notifier_block __read_mostly = {
2890 .notifier_call = team_device_event,
2891 };
2892
2893
2894 /***********************
2895 * Module init and exit
2896 ***********************/
2897
2898 static int __init team_module_init(void)
2899 {
2900 int err;
2901
2902 register_netdevice_notifier(&team_notifier_block);
2903
2904 err = rtnl_link_register(&team_link_ops);
2905 if (err)
2906 goto err_rtnl_reg;
2907
2908 err = team_nl_init();
2909 if (err)
2910 goto err_nl_init;
2911
2912 return 0;
2913
2914 err_nl_init:
2915 rtnl_link_unregister(&team_link_ops);
2916
2917 err_rtnl_reg:
2918 unregister_netdevice_notifier(&team_notifier_block);
2919
2920 return err;
2921 }
2922
2923 static void __exit team_module_exit(void)
2924 {
2925 team_nl_fini();
2926 rtnl_link_unregister(&team_link_ops);
2927 unregister_netdevice_notifier(&team_notifier_block);
2928 }
2929
2930 module_init(team_module_init);
2931 module_exit(team_module_exit);
2932
2933 MODULE_LICENSE("GPL v2");
2934 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
2935 MODULE_DESCRIPTION("Ethernet team device driver");
2936 MODULE_ALIAS_RTNL_LINK(DRV_NAME);
Linux with added FPC-III support