projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
net: better IFF_XMIT_DST_RELEASE support
[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 & NETIF_F_ALL_FOR_ALL;
972 unsigned short max_hard_header_len = ETH_HLEN;
973 unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE |
974 IFF_XMIT_DST_RELEASE_PERM;
975
976 list_for_each_entry(port, &team->port_list, list) {
977 vlan_features = netdev_increment_features(vlan_features,
978 port->dev->vlan_features,
979 TEAM_VLAN_FEATURES);
980
981 dst_release_flag &= port->dev->priv_flags;
982 if (port->dev->hard_header_len > max_hard_header_len)
983 max_hard_header_len = port->dev->hard_header_len;
984 }
985
986 team->dev->vlan_features = vlan_features;
987 team->dev->hard_header_len = max_hard_header_len;
988
989 team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
990 if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
991 team->dev->priv_flags |= IFF_XMIT_DST_RELEASE;
992
993 netdev_change_features(team->dev);
994 }
995
996 static void team_compute_features(struct team *team)
997 {
998 mutex_lock(&team->lock);
999 __team_compute_features(team);
1000 mutex_unlock(&team->lock);
1001 }
1002
1003 static int team_port_enter(struct team *team, struct team_port *port)
1004 {
1005 int err = 0;
1006
1007 dev_hold(team->dev);
1008 if (team->ops.port_enter) {
1009 err = team->ops.port_enter(team, port);
1010 if (err) {
1011 netdev_err(team->dev, "Device %s failed to enter team mode\n",
1012 port->dev->name);
1013 goto err_port_enter;
1014 }
1015 }
1016
1017 return 0;
1018
1019 err_port_enter:
1020 dev_put(team->dev);
1021
1022 return err;
1023 }
1024
1025 static void team_port_leave(struct team *team, struct team_port *port)
1026 {
1027 if (team->ops.port_leave)
1028 team->ops.port_leave(team, port);
1029 dev_put(team->dev);
1030 }
1031
1032 #ifdef CONFIG_NET_POLL_CONTROLLER
1033 static int team_port_enable_netpoll(struct team *team, struct team_port *port)
1034 {
1035 struct netpoll *np;
1036 int err;
1037
1038 if (!team->dev->npinfo)
1039 return 0;
1040
1041 np = kzalloc(sizeof(*np), GFP_KERNEL);
1042 if (!np)
1043 return -ENOMEM;
1044
1045 err = __netpoll_setup(np, port->dev);
1046 if (err) {
1047 kfree(np);
1048 return err;
1049 }
1050 port->np = np;
1051 return err;
1052 }
1053
1054 static void team_port_disable_netpoll(struct team_port *port)
1055 {
1056 struct netpoll *np = port->np;
1057
1058 if (!np)
1059 return;
1060 port->np = NULL;
1061
1062 /* Wait for transmitting packets to finish before freeing. */
1063 synchronize_rcu_bh();
1064 __netpoll_cleanup(np);
1065 kfree(np);
1066 }
1067 #else
1068 static int team_port_enable_netpoll(struct team *team, struct team_port *port)
1069 {
1070 return 0;
1071 }
1072 static void team_port_disable_netpoll(struct team_port *port)
1073 {
1074 }
1075 #endif
1076
1077 static int team_upper_dev_link(struct net_device *dev,
1078 struct net_device *port_dev)
1079 {
1080 int err;
1081
1082 err = netdev_master_upper_dev_link(port_dev, dev);
1083 if (err)
1084 return err;
1085 port_dev->priv_flags |= IFF_TEAM_PORT;
1086 return 0;
1087 }
1088
1089 static void team_upper_dev_unlink(struct net_device *dev,
1090 struct net_device *port_dev)
1091 {
1092 netdev_upper_dev_unlink(port_dev, dev);
1093 port_dev->priv_flags &= ~IFF_TEAM_PORT;
1094 }
1095
1096 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1097 static int team_dev_type_check_change(struct net_device *dev,
1098 struct net_device *port_dev);
1099
1100 static int team_port_add(struct team *team, struct net_device *port_dev)
1101 {
1102 struct net_device *dev = team->dev;
1103 struct team_port *port;
1104 char *portname = port_dev->name;
1105 int err;
1106
1107 if (port_dev->flags & IFF_LOOPBACK) {
1108 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1109 portname);
1110 return -EINVAL;
1111 }
1112
1113 if (team_port_exists(port_dev)) {
1114 netdev_err(dev, "Device %s is already a port "
1115 "of a team device\n", portname);
1116 return -EBUSY;
1117 }
1118
1119 if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1120 vlan_uses_dev(dev)) {
1121 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1122 portname);
1123 return -EPERM;
1124 }
1125
1126 err = team_dev_type_check_change(dev, port_dev);
1127 if (err)
1128 return err;
1129
1130 if (port_dev->flags & IFF_UP) {
1131 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1132 portname);
1133 return -EBUSY;
1134 }
1135
1136 port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1137 GFP_KERNEL);
1138 if (!port)
1139 return -ENOMEM;
1140
1141 port->dev = port_dev;
1142 port->team = team;
1143 INIT_LIST_HEAD(&port->qom_list);
1144
1145 port->orig.mtu = port_dev->mtu;
1146 err = dev_set_mtu(port_dev, dev->mtu);
1147 if (err) {
1148 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1149 goto err_set_mtu;
1150 }
1151
1152 memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1153
1154 err = team_port_enter(team, port);
1155 if (err) {
1156 netdev_err(dev, "Device %s failed to enter team mode\n",
1157 portname);
1158 goto err_port_enter;
1159 }
1160
1161 err = dev_open(port_dev);
1162 if (err) {
1163 netdev_dbg(dev, "Device %s opening failed\n",
1164 portname);
1165 goto err_dev_open;
1166 }
1167
1168 err = vlan_vids_add_by_dev(port_dev, dev);
1169 if (err) {
1170 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1171 portname);
1172 goto err_vids_add;
1173 }
1174
1175 err = team_port_enable_netpoll(team, port);
1176 if (err) {
1177 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1178 portname);
1179 goto err_enable_netpoll;
1180 }
1181
1182 err = netdev_rx_handler_register(port_dev, team_handle_frame,
1183 port);
1184 if (err) {
1185 netdev_err(dev, "Device %s failed to register rx_handler\n",
1186 portname);
1187 goto err_handler_register;
1188 }
1189
1190 err = team_upper_dev_link(dev, port_dev);
1191 if (err) {
1192 netdev_err(dev, "Device %s failed to set upper link\n",
1193 portname);
1194 goto err_set_upper_link;
1195 }
1196
1197 err = __team_option_inst_add_port(team, port);
1198 if (err) {
1199 netdev_err(dev, "Device %s failed to add per-port options\n",
1200 portname);
1201 goto err_option_port_add;
1202 }
1203
1204 port->index = -1;
1205 list_add_tail_rcu(&port->list, &team->port_list);
1206 team_port_enable(team, port);
1207 __team_compute_features(team);
1208 __team_port_change_port_added(port, !!netif_carrier_ok(port_dev));
1209 __team_options_change_check(team);
1210
1211 netdev_info(dev, "Port device %s added\n", portname);
1212
1213 return 0;
1214
1215 err_option_port_add:
1216 team_upper_dev_unlink(dev, port_dev);
1217
1218 err_set_upper_link:
1219 netdev_rx_handler_unregister(port_dev);
1220
1221 err_handler_register:
1222 team_port_disable_netpoll(port);
1223
1224 err_enable_netpoll:
1225 vlan_vids_del_by_dev(port_dev, dev);
1226
1227 err_vids_add:
1228 dev_close(port_dev);
1229
1230 err_dev_open:
1231 team_port_leave(team, port);
1232 team_port_set_orig_dev_addr(port);
1233
1234 err_port_enter:
1235 dev_set_mtu(port_dev, port->orig.mtu);
1236
1237 err_set_mtu:
1238 kfree(port);
1239
1240 return err;
1241 }
1242
1243 static void __team_port_change_port_removed(struct team_port *port);
1244
1245 static int team_port_del(struct team *team, struct net_device *port_dev)
1246 {
1247 struct net_device *dev = team->dev;
1248 struct team_port *port;
1249 char *portname = port_dev->name;
1250
1251 port = team_port_get_rtnl(port_dev);
1252 if (!port || !team_port_find(team, port)) {
1253 netdev_err(dev, "Device %s does not act as a port of this team\n",
1254 portname);
1255 return -ENOENT;
1256 }
1257
1258 team_port_disable(team, port);
1259 list_del_rcu(&port->list);
1260 team_upper_dev_unlink(dev, port_dev);
1261 netdev_rx_handler_unregister(port_dev);
1262 team_port_disable_netpoll(port);
1263 vlan_vids_del_by_dev(port_dev, dev);
1264 dev_uc_unsync(port_dev, dev);
1265 dev_mc_unsync(port_dev, dev);
1266 dev_close(port_dev);
1267 team_port_leave(team, port);
1268
1269 __team_option_inst_mark_removed_port(team, port);
1270 __team_options_change_check(team);
1271 __team_option_inst_del_port(team, port);
1272 __team_port_change_port_removed(port);
1273
1274 team_port_set_orig_dev_addr(port);
1275 dev_set_mtu(port_dev, port->orig.mtu);
1276 kfree_rcu(port, rcu);
1277 netdev_info(dev, "Port device %s removed\n", portname);
1278 __team_compute_features(team);
1279
1280 return 0;
1281 }
1282
1283
1284 /*****************
1285 * Net device ops
1286 *****************/
1287
1288 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1289 {
1290 ctx->data.str_val = team->mode->kind;
1291 return 0;
1292 }
1293
1294 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1295 {
1296 return team_change_mode(team, ctx->data.str_val);
1297 }
1298
1299 static int team_notify_peers_count_get(struct team *team,
1300 struct team_gsetter_ctx *ctx)
1301 {
1302 ctx->data.u32_val = team->notify_peers.count;
1303 return 0;
1304 }
1305
1306 static int team_notify_peers_count_set(struct team *team,
1307 struct team_gsetter_ctx *ctx)
1308 {
1309 team->notify_peers.count = ctx->data.u32_val;
1310 return 0;
1311 }
1312
1313 static int team_notify_peers_interval_get(struct team *team,
1314 struct team_gsetter_ctx *ctx)
1315 {
1316 ctx->data.u32_val = team->notify_peers.interval;
1317 return 0;
1318 }
1319
1320 static int team_notify_peers_interval_set(struct team *team,
1321 struct team_gsetter_ctx *ctx)
1322 {
1323 team->notify_peers.interval = ctx->data.u32_val;
1324 return 0;
1325 }
1326
1327 static int team_mcast_rejoin_count_get(struct team *team,
1328 struct team_gsetter_ctx *ctx)
1329 {
1330 ctx->data.u32_val = team->mcast_rejoin.count;
1331 return 0;
1332 }
1333
1334 static int team_mcast_rejoin_count_set(struct team *team,
1335 struct team_gsetter_ctx *ctx)
1336 {
1337 team->mcast_rejoin.count = ctx->data.u32_val;
1338 return 0;
1339 }
1340
1341 static int team_mcast_rejoin_interval_get(struct team *team,
1342 struct team_gsetter_ctx *ctx)
1343 {
1344 ctx->data.u32_val = team->mcast_rejoin.interval;
1345 return 0;
1346 }
1347
1348 static int team_mcast_rejoin_interval_set(struct team *team,
1349 struct team_gsetter_ctx *ctx)
1350 {
1351 team->mcast_rejoin.interval = ctx->data.u32_val;
1352 return 0;
1353 }
1354
1355 static int team_port_en_option_get(struct team *team,
1356 struct team_gsetter_ctx *ctx)
1357 {
1358 struct team_port *port = ctx->info->port;
1359
1360 ctx->data.bool_val = team_port_enabled(port);
1361 return 0;
1362 }
1363
1364 static int team_port_en_option_set(struct team *team,
1365 struct team_gsetter_ctx *ctx)
1366 {
1367 struct team_port *port = ctx->info->port;
1368
1369 if (ctx->data.bool_val)
1370 team_port_enable(team, port);
1371 else
1372 team_port_disable(team, port);
1373 return 0;
1374 }
1375
1376 static int team_user_linkup_option_get(struct team *team,
1377 struct team_gsetter_ctx *ctx)
1378 {
1379 struct team_port *port = ctx->info->port;
1380
1381 ctx->data.bool_val = port->user.linkup;
1382 return 0;
1383 }
1384
1385 static void __team_carrier_check(struct team *team);
1386
1387 static int team_user_linkup_option_set(struct team *team,
1388 struct team_gsetter_ctx *ctx)
1389 {
1390 struct team_port *port = ctx->info->port;
1391
1392 port->user.linkup = ctx->data.bool_val;
1393 team_refresh_port_linkup(port);
1394 __team_carrier_check(port->team);
1395 return 0;
1396 }
1397
1398 static int team_user_linkup_en_option_get(struct team *team,
1399 struct team_gsetter_ctx *ctx)
1400 {
1401 struct team_port *port = ctx->info->port;
1402
1403 ctx->data.bool_val = port->user.linkup_enabled;
1404 return 0;
1405 }
1406
1407 static int team_user_linkup_en_option_set(struct team *team,
1408 struct team_gsetter_ctx *ctx)
1409 {
1410 struct team_port *port = ctx->info->port;
1411
1412 port->user.linkup_enabled = ctx->data.bool_val;
1413 team_refresh_port_linkup(port);
1414 __team_carrier_check(port->team);
1415 return 0;
1416 }
1417
1418 static int team_priority_option_get(struct team *team,
1419 struct team_gsetter_ctx *ctx)
1420 {
1421 struct team_port *port = ctx->info->port;
1422
1423 ctx->data.s32_val = port->priority;
1424 return 0;
1425 }
1426
1427 static int team_priority_option_set(struct team *team,
1428 struct team_gsetter_ctx *ctx)
1429 {
1430 struct team_port *port = ctx->info->port;
1431 s32 priority = ctx->data.s32_val;
1432
1433 if (port->priority == priority)
1434 return 0;
1435 port->priority = priority;
1436 team_queue_override_port_prio_changed(team, port);
1437 return 0;
1438 }
1439
1440 static int team_queue_id_option_get(struct team *team,
1441 struct team_gsetter_ctx *ctx)
1442 {
1443 struct team_port *port = ctx->info->port;
1444
1445 ctx->data.u32_val = port->queue_id;
1446 return 0;
1447 }
1448
1449 static int team_queue_id_option_set(struct team *team,
1450 struct team_gsetter_ctx *ctx)
1451 {
1452 struct team_port *port = ctx->info->port;
1453 u16 new_queue_id = ctx->data.u32_val;
1454
1455 if (port->queue_id == new_queue_id)
1456 return 0;
1457 if (new_queue_id >= team->dev->real_num_tx_queues)
1458 return -EINVAL;
1459 team_queue_override_port_change_queue_id(team, port, new_queue_id);
1460 return 0;
1461 }
1462
1463 static const struct team_option team_options[] = {
1464 {
1465 .name = "mode",
1466 .type = TEAM_OPTION_TYPE_STRING,
1467 .getter = team_mode_option_get,
1468 .setter = team_mode_option_set,
1469 },
1470 {
1471 .name = "notify_peers_count",
1472 .type = TEAM_OPTION_TYPE_U32,
1473 .getter = team_notify_peers_count_get,
1474 .setter = team_notify_peers_count_set,
1475 },
1476 {
1477 .name = "notify_peers_interval",
1478 .type = TEAM_OPTION_TYPE_U32,
1479 .getter = team_notify_peers_interval_get,
1480 .setter = team_notify_peers_interval_set,
1481 },
1482 {
1483 .name = "mcast_rejoin_count",
1484 .type = TEAM_OPTION_TYPE_U32,
1485 .getter = team_mcast_rejoin_count_get,
1486 .setter = team_mcast_rejoin_count_set,
1487 },
1488 {
1489 .name = "mcast_rejoin_interval",
1490 .type = TEAM_OPTION_TYPE_U32,
1491 .getter = team_mcast_rejoin_interval_get,
1492 .setter = team_mcast_rejoin_interval_set,
1493 },
1494 {
1495 .name = "enabled",
1496 .type = TEAM_OPTION_TYPE_BOOL,
1497 .per_port = true,
1498 .getter = team_port_en_option_get,
1499 .setter = team_port_en_option_set,
1500 },
1501 {
1502 .name = "user_linkup",
1503 .type = TEAM_OPTION_TYPE_BOOL,
1504 .per_port = true,
1505 .getter = team_user_linkup_option_get,
1506 .setter = team_user_linkup_option_set,
1507 },
1508 {
1509 .name = "user_linkup_enabled",
1510 .type = TEAM_OPTION_TYPE_BOOL,
1511 .per_port = true,
1512 .getter = team_user_linkup_en_option_get,
1513 .setter = team_user_linkup_en_option_set,
1514 },
1515 {
1516 .name = "priority",
1517 .type = TEAM_OPTION_TYPE_S32,
1518 .per_port = true,
1519 .getter = team_priority_option_get,
1520 .setter = team_priority_option_set,
1521 },
1522 {
1523 .name = "queue_id",
1524 .type = TEAM_OPTION_TYPE_U32,
1525 .per_port = true,
1526 .getter = team_queue_id_option_get,
1527 .setter = team_queue_id_option_set,
1528 },
1529 };
1530
1531 static struct lock_class_key team_netdev_xmit_lock_key;
1532 static struct lock_class_key team_netdev_addr_lock_key;
1533 static struct lock_class_key team_tx_busylock_key;
1534
1535 static void team_set_lockdep_class_one(struct net_device *dev,
1536 struct netdev_queue *txq,
1537 void *unused)
1538 {
1539 lockdep_set_class(&txq->_xmit_lock, &team_netdev_xmit_lock_key);
1540 }
1541
1542 static void team_set_lockdep_class(struct net_device *dev)
1543 {
1544 lockdep_set_class(&dev->addr_list_lock, &team_netdev_addr_lock_key);
1545 netdev_for_each_tx_queue(dev, team_set_lockdep_class_one, NULL);
1546 dev->qdisc_tx_busylock = &team_tx_busylock_key;
1547 }
1548
1549 static int team_init(struct net_device *dev)
1550 {
1551 struct team *team = netdev_priv(dev);
1552 int i;
1553 int err;
1554
1555 team->dev = dev;
1556 mutex_init(&team->lock);
1557 team_set_no_mode(team);
1558
1559 team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1560 if (!team->pcpu_stats)
1561 return -ENOMEM;
1562
1563 for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1564 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1565 INIT_LIST_HEAD(&team->port_list);
1566 err = team_queue_override_init(team);
1567 if (err)
1568 goto err_team_queue_override_init;
1569
1570 team_adjust_ops(team);
1571
1572 INIT_LIST_HEAD(&team->option_list);
1573 INIT_LIST_HEAD(&team->option_inst_list);
1574
1575 team_notify_peers_init(team);
1576 team_mcast_rejoin_init(team);
1577
1578 err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1579 if (err)
1580 goto err_options_register;
1581 netif_carrier_off(dev);
1582
1583 team_set_lockdep_class(dev);
1584
1585 return 0;
1586
1587 err_options_register:
1588 team_mcast_rejoin_fini(team);
1589 team_notify_peers_fini(team);
1590 team_queue_override_fini(team);
1591 err_team_queue_override_init:
1592 free_percpu(team->pcpu_stats);
1593
1594 return err;
1595 }
1596
1597 static void team_uninit(struct net_device *dev)
1598 {
1599 struct team *team = netdev_priv(dev);
1600 struct team_port *port;
1601 struct team_port *tmp;
1602
1603 mutex_lock(&team->lock);
1604 list_for_each_entry_safe(port, tmp, &team->port_list, list)
1605 team_port_del(team, port->dev);
1606
1607 __team_change_mode(team, NULL); /* cleanup */
1608 __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1609 team_mcast_rejoin_fini(team);
1610 team_notify_peers_fini(team);
1611 team_queue_override_fini(team);
1612 mutex_unlock(&team->lock);
1613 }
1614
1615 static void team_destructor(struct net_device *dev)
1616 {
1617 struct team *team = netdev_priv(dev);
1618
1619 free_percpu(team->pcpu_stats);
1620 free_netdev(dev);
1621 }
1622
1623 static int team_open(struct net_device *dev)
1624 {
1625 return 0;
1626 }
1627
1628 static int team_close(struct net_device *dev)
1629 {
1630 return 0;
1631 }
1632
1633 /*
1634 * note: already called with rcu_read_lock
1635 */
1636 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1637 {
1638 struct team *team = netdev_priv(dev);
1639 bool tx_success;
1640 unsigned int len = skb->len;
1641
1642 tx_success = team_queue_override_transmit(team, skb);
1643 if (!tx_success)
1644 tx_success = team->ops.transmit(team, skb);
1645 if (tx_success) {
1646 struct team_pcpu_stats *pcpu_stats;
1647
1648 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1649 u64_stats_update_begin(&pcpu_stats->syncp);
1650 pcpu_stats->tx_packets++;
1651 pcpu_stats->tx_bytes += len;
1652 u64_stats_update_end(&pcpu_stats->syncp);
1653 } else {
1654 this_cpu_inc(team->pcpu_stats->tx_dropped);
1655 }
1656
1657 return NETDEV_TX_OK;
1658 }
1659
1660 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1661 void *accel_priv, select_queue_fallback_t fallback)
1662 {
1663 /*
1664 * This helper function exists to help dev_pick_tx get the correct
1665 * destination queue. Using a helper function skips a call to
1666 * skb_tx_hash and will put the skbs in the queue we expect on their
1667 * way down to the team driver.
1668 */
1669 u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1670
1671 /*
1672 * Save the original txq to restore before passing to the driver
1673 */
1674 qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1675
1676 if (unlikely(txq >= dev->real_num_tx_queues)) {
1677 do {
1678 txq -= dev->real_num_tx_queues;
1679 } while (txq >= dev->real_num_tx_queues);
1680 }
1681 return txq;
1682 }
1683
1684 static void team_change_rx_flags(struct net_device *dev, int change)
1685 {
1686 struct team *team = netdev_priv(dev);
1687 struct team_port *port;
1688 int inc;
1689
1690 rcu_read_lock();
1691 list_for_each_entry_rcu(port, &team->port_list, list) {
1692 if (change & IFF_PROMISC) {
1693 inc = dev->flags & IFF_PROMISC ? 1 : -1;
1694 dev_set_promiscuity(port->dev, inc);
1695 }
1696 if (change & IFF_ALLMULTI) {
1697 inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1698 dev_set_allmulti(port->dev, inc);
1699 }
1700 }
1701 rcu_read_unlock();
1702 }
1703
1704 static void team_set_rx_mode(struct net_device *dev)
1705 {
1706 struct team *team = netdev_priv(dev);
1707 struct team_port *port;
1708
1709 rcu_read_lock();
1710 list_for_each_entry_rcu(port, &team->port_list, list) {
1711 dev_uc_sync_multiple(port->dev, dev);
1712 dev_mc_sync_multiple(port->dev, dev);
1713 }
1714 rcu_read_unlock();
1715 }
1716
1717 static int team_set_mac_address(struct net_device *dev, void *p)
1718 {
1719 struct sockaddr *addr = p;
1720 struct team *team = netdev_priv(dev);
1721 struct team_port *port;
1722
1723 if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1724 return -EADDRNOTAVAIL;
1725 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1726 rcu_read_lock();
1727 list_for_each_entry_rcu(port, &team->port_list, list)
1728 if (team->ops.port_change_dev_addr)
1729 team->ops.port_change_dev_addr(team, port);
1730 rcu_read_unlock();
1731 return 0;
1732 }
1733
1734 static int team_change_mtu(struct net_device *dev, int new_mtu)
1735 {
1736 struct team *team = netdev_priv(dev);
1737 struct team_port *port;
1738 int err;
1739
1740 /*
1741 * Alhough this is reader, it's guarded by team lock. It's not possible
1742 * to traverse list in reverse under rcu_read_lock
1743 */
1744 mutex_lock(&team->lock);
1745 team->port_mtu_change_allowed = true;
1746 list_for_each_entry(port, &team->port_list, list) {
1747 err = dev_set_mtu(port->dev, new_mtu);
1748 if (err) {
1749 netdev_err(dev, "Device %s failed to change mtu",
1750 port->dev->name);
1751 goto unwind;
1752 }
1753 }
1754 team->port_mtu_change_allowed = false;
1755 mutex_unlock(&team->lock);
1756
1757 dev->mtu = new_mtu;
1758
1759 return 0;
1760
1761 unwind:
1762 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1763 dev_set_mtu(port->dev, dev->mtu);
1764 team->port_mtu_change_allowed = false;
1765 mutex_unlock(&team->lock);
1766
1767 return err;
1768 }
1769
1770 static struct rtnl_link_stats64 *
1771 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1772 {
1773 struct team *team = netdev_priv(dev);
1774 struct team_pcpu_stats *p;
1775 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1776 u32 rx_dropped = 0, tx_dropped = 0;
1777 unsigned int start;
1778 int i;
1779
1780 for_each_possible_cpu(i) {
1781 p = per_cpu_ptr(team->pcpu_stats, i);
1782 do {
1783 start = u64_stats_fetch_begin_irq(&p->syncp);
1784 rx_packets = p->rx_packets;
1785 rx_bytes = p->rx_bytes;
1786 rx_multicast = p->rx_multicast;
1787 tx_packets = p->tx_packets;
1788 tx_bytes = p->tx_bytes;
1789 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
1790
1791 stats->rx_packets += rx_packets;
1792 stats->rx_bytes += rx_bytes;
1793 stats->multicast += rx_multicast;
1794 stats->tx_packets += tx_packets;
1795 stats->tx_bytes += tx_bytes;
1796 /*
1797 * rx_dropped & tx_dropped are u32, updated
1798 * without syncp protection.
1799 */
1800 rx_dropped += p->rx_dropped;
1801 tx_dropped += p->tx_dropped;
1802 }
1803 stats->rx_dropped = rx_dropped;
1804 stats->tx_dropped = tx_dropped;
1805 return stats;
1806 }
1807
1808 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1809 {
1810 struct team *team = netdev_priv(dev);
1811 struct team_port *port;
1812 int err;
1813
1814 /*
1815 * Alhough this is reader, it's guarded by team lock. It's not possible
1816 * to traverse list in reverse under rcu_read_lock
1817 */
1818 mutex_lock(&team->lock);
1819 list_for_each_entry(port, &team->port_list, list) {
1820 err = vlan_vid_add(port->dev, proto, vid);
1821 if (err)
1822 goto unwind;
1823 }
1824 mutex_unlock(&team->lock);
1825
1826 return 0;
1827
1828 unwind:
1829 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1830 vlan_vid_del(port->dev, proto, vid);
1831 mutex_unlock(&team->lock);
1832
1833 return err;
1834 }
1835
1836 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1837 {
1838 struct team *team = netdev_priv(dev);
1839 struct team_port *port;
1840
1841 rcu_read_lock();
1842 list_for_each_entry_rcu(port, &team->port_list, list)
1843 vlan_vid_del(port->dev, proto, vid);
1844 rcu_read_unlock();
1845
1846 return 0;
1847 }
1848
1849 #ifdef CONFIG_NET_POLL_CONTROLLER
1850 static void team_poll_controller(struct net_device *dev)
1851 {
1852 }
1853
1854 static void __team_netpoll_cleanup(struct team *team)
1855 {
1856 struct team_port *port;
1857
1858 list_for_each_entry(port, &team->port_list, list)
1859 team_port_disable_netpoll(port);
1860 }
1861
1862 static void team_netpoll_cleanup(struct net_device *dev)
1863 {
1864 struct team *team = netdev_priv(dev);
1865
1866 mutex_lock(&team->lock);
1867 __team_netpoll_cleanup(team);
1868 mutex_unlock(&team->lock);
1869 }
1870
1871 static int team_netpoll_setup(struct net_device *dev,
1872 struct netpoll_info *npifo)
1873 {
1874 struct team *team = netdev_priv(dev);
1875 struct team_port *port;
1876 int err = 0;
1877
1878 mutex_lock(&team->lock);
1879 list_for_each_entry(port, &team->port_list, list) {
1880 err = team_port_enable_netpoll(team, port);
1881 if (err) {
1882 __team_netpoll_cleanup(team);
1883 break;
1884 }
1885 }
1886 mutex_unlock(&team->lock);
1887 return err;
1888 }
1889 #endif
1890
1891 static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
1892 {
1893 struct team *team = netdev_priv(dev);
1894 int err;
1895
1896 mutex_lock(&team->lock);
1897 err = team_port_add(team, port_dev);
1898 mutex_unlock(&team->lock);
1899 return err;
1900 }
1901
1902 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1903 {
1904 struct team *team = netdev_priv(dev);
1905 int err;
1906
1907 mutex_lock(&team->lock);
1908 err = team_port_del(team, port_dev);
1909 mutex_unlock(&team->lock);
1910 return err;
1911 }
1912
1913 static netdev_features_t team_fix_features(struct net_device *dev,
1914 netdev_features_t features)
1915 {
1916 struct team_port *port;
1917 struct team *team = netdev_priv(dev);
1918 netdev_features_t mask;
1919
1920 mask = features;
1921 features &= ~NETIF_F_ONE_FOR_ALL;
1922 features |= NETIF_F_ALL_FOR_ALL;
1923
1924 rcu_read_lock();
1925 list_for_each_entry_rcu(port, &team->port_list, list) {
1926 features = netdev_increment_features(features,
1927 port->dev->features,
1928 mask);
1929 }
1930 rcu_read_unlock();
1931 return features;
1932 }
1933
1934 static int team_change_carrier(struct net_device *dev, bool new_carrier)
1935 {
1936 struct team *team = netdev_priv(dev);
1937
1938 team->user_carrier_enabled = true;
1939
1940 if (new_carrier)
1941 netif_carrier_on(dev);
1942 else
1943 netif_carrier_off(dev);
1944 return 0;
1945 }
1946
1947 static const struct net_device_ops team_netdev_ops = {
1948 .ndo_init = team_init,
1949 .ndo_uninit = team_uninit,
1950 .ndo_open = team_open,
1951 .ndo_stop = team_close,
1952 .ndo_start_xmit = team_xmit,
1953 .ndo_select_queue = team_select_queue,
1954 .ndo_change_rx_flags = team_change_rx_flags,
1955 .ndo_set_rx_mode = team_set_rx_mode,
1956 .ndo_set_mac_address = team_set_mac_address,
1957 .ndo_change_mtu = team_change_mtu,
1958 .ndo_get_stats64 = team_get_stats64,
1959 .ndo_vlan_rx_add_vid = team_vlan_rx_add_vid,
1960 .ndo_vlan_rx_kill_vid = team_vlan_rx_kill_vid,
1961 #ifdef CONFIG_NET_POLL_CONTROLLER
1962 .ndo_poll_controller = team_poll_controller,
1963 .ndo_netpoll_setup = team_netpoll_setup,
1964 .ndo_netpoll_cleanup = team_netpoll_cleanup,
1965 #endif
1966 .ndo_add_slave = team_add_slave,
1967 .ndo_del_slave = team_del_slave,
1968 .ndo_fix_features = team_fix_features,
1969 .ndo_change_carrier = team_change_carrier,
1970 };
1971
1972 /***********************
1973 * ethtool interface
1974 ***********************/
1975
1976 static void team_ethtool_get_drvinfo(struct net_device *dev,
1977 struct ethtool_drvinfo *drvinfo)
1978 {
1979 strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
1980 strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
1981 }
1982
1983 static const struct ethtool_ops team_ethtool_ops = {
1984 .get_drvinfo = team_ethtool_get_drvinfo,
1985 .get_link = ethtool_op_get_link,
1986 };
1987
1988 /***********************
1989 * rt netlink interface
1990 ***********************/
1991
1992 static void team_setup_by_port(struct net_device *dev,
1993 struct net_device *port_dev)
1994 {
1995 dev->header_ops = port_dev->header_ops;
1996 dev->type = port_dev->type;
1997 dev->hard_header_len = port_dev->hard_header_len;
1998 dev->addr_len = port_dev->addr_len;
1999 dev->mtu = port_dev->mtu;
2000 memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2001 eth_hw_addr_inherit(dev, port_dev);
2002 }
2003
2004 static int team_dev_type_check_change(struct net_device *dev,
2005 struct net_device *port_dev)
2006 {
2007 struct team *team = netdev_priv(dev);
2008 char *portname = port_dev->name;
2009 int err;
2010
2011 if (dev->type == port_dev->type)
2012 return 0;
2013 if (!list_empty(&team->port_list)) {
2014 netdev_err(dev, "Device %s is of different type\n", portname);
2015 return -EBUSY;
2016 }
2017 err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2018 err = notifier_to_errno(err);
2019 if (err) {
2020 netdev_err(dev, "Refused to change device type\n");
2021 return err;
2022 }
2023 dev_uc_flush(dev);
2024 dev_mc_flush(dev);
2025 team_setup_by_port(dev, port_dev);
2026 call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2027 return 0;
2028 }
2029
2030 static void team_setup(struct net_device *dev)
2031 {
2032 ether_setup(dev);
2033
2034 dev->netdev_ops = &team_netdev_ops;
2035 dev->ethtool_ops = &team_ethtool_ops;
2036 dev->destructor = team_destructor;
2037 dev->tx_queue_len = 0;
2038 dev->flags |= IFF_MULTICAST;
2039 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2040
2041 /*
2042 * Indicate we support unicast address filtering. That way core won't
2043 * bring us to promisc mode in case a unicast addr is added.
2044 * Let this up to underlay drivers.
2045 */
2046 dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2047
2048 dev->features |= NETIF_F_LLTX;
2049 dev->features |= NETIF_F_GRO;
2050
2051 /* Don't allow team devices to change network namespaces. */
2052 dev->features |= NETIF_F_NETNS_LOCAL;
2053
2054 dev->hw_features = TEAM_VLAN_FEATURES |
2055 NETIF_F_HW_VLAN_CTAG_TX |
2056 NETIF_F_HW_VLAN_CTAG_RX |
2057 NETIF_F_HW_VLAN_CTAG_FILTER;
2058
2059 dev->hw_features &= ~(NETIF_F_ALL_CSUM & ~NETIF_F_HW_CSUM);
2060 dev->features |= dev->hw_features;
2061 }
2062
2063 static int team_newlink(struct net *src_net, struct net_device *dev,
2064 struct nlattr *tb[], struct nlattr *data[])
2065 {
2066 if (tb[IFLA_ADDRESS] == NULL)
2067 eth_hw_addr_random(dev);
2068
2069 return register_netdevice(dev);
2070 }
2071
2072 static int team_validate(struct nlattr *tb[], struct nlattr *data[])
2073 {
2074 if (tb[IFLA_ADDRESS]) {
2075 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2076 return -EINVAL;
2077 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2078 return -EADDRNOTAVAIL;
2079 }
2080 return 0;
2081 }
2082
2083 static unsigned int team_get_num_tx_queues(void)
2084 {
2085 return TEAM_DEFAULT_NUM_TX_QUEUES;
2086 }
2087
2088 static unsigned int team_get_num_rx_queues(void)
2089 {
2090 return TEAM_DEFAULT_NUM_RX_QUEUES;
2091 }
2092
2093 static struct rtnl_link_ops team_link_ops __read_mostly = {
2094 .kind = DRV_NAME,
2095 .priv_size = sizeof(struct team),
2096 .setup = team_setup,
2097 .newlink = team_newlink,
2098 .validate = team_validate,
2099 .get_num_tx_queues = team_get_num_tx_queues,
2100 .get_num_rx_queues = team_get_num_rx_queues,
2101 };
2102
2103
2104 /***********************************
2105 * Generic netlink custom interface
2106 ***********************************/
2107
2108 static struct genl_family team_nl_family = {
2109 .id = GENL_ID_GENERATE,
2110 .name = TEAM_GENL_NAME,
2111 .version = TEAM_GENL_VERSION,
2112 .maxattr = TEAM_ATTR_MAX,
2113 .netnsok = true,
2114 };
2115
2116 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2117 [TEAM_ATTR_UNSPEC] = { .type = NLA_UNSPEC, },
2118 [TEAM_ATTR_TEAM_IFINDEX] = { .type = NLA_U32 },
2119 [TEAM_ATTR_LIST_OPTION] = { .type = NLA_NESTED },
2120 [TEAM_ATTR_LIST_PORT] = { .type = NLA_NESTED },
2121 };
2122
2123 static const struct nla_policy
2124 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2125 [TEAM_ATTR_OPTION_UNSPEC] = { .type = NLA_UNSPEC, },
2126 [TEAM_ATTR_OPTION_NAME] = {
2127 .type = NLA_STRING,
2128 .len = TEAM_STRING_MAX_LEN,
2129 },
2130 [TEAM_ATTR_OPTION_CHANGED] = { .type = NLA_FLAG },
2131 [TEAM_ATTR_OPTION_TYPE] = { .type = NLA_U8 },
2132 [TEAM_ATTR_OPTION_DATA] = { .type = NLA_BINARY },
2133 };
2134
2135 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2136 {
2137 struct sk_buff *msg;
2138 void *hdr;
2139 int err;
2140
2141 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2142 if (!msg)
2143 return -ENOMEM;
2144
2145 hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2146 &team_nl_family, 0, TEAM_CMD_NOOP);
2147 if (!hdr) {
2148 err = -EMSGSIZE;
2149 goto err_msg_put;
2150 }
2151
2152 genlmsg_end(msg, hdr);
2153
2154 return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2155
2156 err_msg_put:
2157 nlmsg_free(msg);
2158
2159 return err;
2160 }
2161
2162 /*
2163 * Netlink cmd functions should be locked by following two functions.
2164 * Since dev gets held here, that ensures dev won't disappear in between.
2165 */
2166 static struct team *team_nl_team_get(struct genl_info *info)
2167 {
2168 struct net *net = genl_info_net(info);
2169 int ifindex;
2170 struct net_device *dev;
2171 struct team *team;
2172
2173 if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2174 return NULL;
2175
2176 ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2177 dev = dev_get_by_index(net, ifindex);
2178 if (!dev || dev->netdev_ops != &team_netdev_ops) {
2179 if (dev)
2180 dev_put(dev);
2181 return NULL;
2182 }
2183
2184 team = netdev_priv(dev);
2185 mutex_lock(&team->lock);
2186 return team;
2187 }
2188
2189 static void team_nl_team_put(struct team *team)
2190 {
2191 mutex_unlock(&team->lock);
2192 dev_put(team->dev);
2193 }
2194
2195 typedef int team_nl_send_func_t(struct sk_buff *skb,
2196 struct team *team, u32 portid);
2197
2198 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2199 {
2200 return genlmsg_unicast(dev_net(team->dev), skb, portid);
2201 }
2202
2203 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2204 struct team_option_inst *opt_inst)
2205 {
2206 struct nlattr *option_item;
2207 struct team_option *option = opt_inst->option;
2208 struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2209 struct team_gsetter_ctx ctx;
2210 int err;
2211
2212 ctx.info = opt_inst_info;
2213 err = team_option_get(team, opt_inst, &ctx);
2214 if (err)
2215 return err;
2216
2217 option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
2218 if (!option_item)
2219 return -EMSGSIZE;
2220
2221 if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2222 goto nest_cancel;
2223 if (opt_inst_info->port &&
2224 nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2225 opt_inst_info->port->dev->ifindex))
2226 goto nest_cancel;
2227 if (opt_inst->option->array_size &&
2228 nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2229 opt_inst_info->array_index))
2230 goto nest_cancel;
2231
2232 switch (option->type) {
2233 case TEAM_OPTION_TYPE_U32:
2234 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2235 goto nest_cancel;
2236 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2237 goto nest_cancel;
2238 break;
2239 case TEAM_OPTION_TYPE_STRING:
2240 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2241 goto nest_cancel;
2242 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2243 ctx.data.str_val))
2244 goto nest_cancel;
2245 break;
2246 case TEAM_OPTION_TYPE_BINARY:
2247 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2248 goto nest_cancel;
2249 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2250 ctx.data.bin_val.ptr))
2251 goto nest_cancel;
2252 break;
2253 case TEAM_OPTION_TYPE_BOOL:
2254 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2255 goto nest_cancel;
2256 if (ctx.data.bool_val &&
2257 nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2258 goto nest_cancel;
2259 break;
2260 case TEAM_OPTION_TYPE_S32:
2261 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2262 goto nest_cancel;
2263 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2264 goto nest_cancel;
2265 break;
2266 default:
2267 BUG();
2268 }
2269 if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2270 goto nest_cancel;
2271 if (opt_inst->changed) {
2272 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2273 goto nest_cancel;
2274 opt_inst->changed = false;
2275 }
2276 nla_nest_end(skb, option_item);
2277 return 0;
2278
2279 nest_cancel:
2280 nla_nest_cancel(skb, option_item);
2281 return -EMSGSIZE;
2282 }
2283
2284 static int __send_and_alloc_skb(struct sk_buff **pskb,
2285 struct team *team, u32 portid,
2286 team_nl_send_func_t *send_func)
2287 {
2288 int err;
2289
2290 if (*pskb) {
2291 err = send_func(*pskb, team, portid);
2292 if (err)
2293 return err;
2294 }
2295 *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2296 if (!*pskb)
2297 return -ENOMEM;
2298 return 0;
2299 }
2300
2301 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2302 int flags, team_nl_send_func_t *send_func,
2303 struct list_head *sel_opt_inst_list)
2304 {
2305 struct nlattr *option_list;
2306 struct nlmsghdr *nlh;
2307 void *hdr;
2308 struct team_option_inst *opt_inst;
2309 int err;
2310 struct sk_buff *skb = NULL;
2311 bool incomplete;
2312 int i;
2313
2314 opt_inst = list_first_entry(sel_opt_inst_list,
2315 struct team_option_inst, tmp_list);
2316
2317 start_again:
2318 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2319 if (err)
2320 return err;
2321
2322 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2323 TEAM_CMD_OPTIONS_GET);
2324 if (!hdr)
2325 return -EMSGSIZE;
2326
2327 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2328 goto nla_put_failure;
2329 option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2330 if (!option_list)
2331 goto nla_put_failure;
2332
2333 i = 0;
2334 incomplete = false;
2335 list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2336 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2337 if (err) {
2338 if (err == -EMSGSIZE) {
2339 if (!i)
2340 goto errout;
2341 incomplete = true;
2342 break;
2343 }
2344 goto errout;
2345 }
2346 i++;
2347 }
2348
2349 nla_nest_end(skb, option_list);
2350 genlmsg_end(skb, hdr);
2351 if (incomplete)
2352 goto start_again;
2353
2354 send_done:
2355 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2356 if (!nlh) {
2357 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2358 if (err)
2359 goto errout;
2360 goto send_done;
2361 }
2362
2363 return send_func(skb, team, portid);
2364
2365 nla_put_failure:
2366 err = -EMSGSIZE;
2367 errout:
2368 genlmsg_cancel(skb, hdr);
2369 nlmsg_free(skb);
2370 return err;
2371 }
2372
2373 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2374 {
2375 struct team *team;
2376 struct team_option_inst *opt_inst;
2377 int err;
2378 LIST_HEAD(sel_opt_inst_list);
2379
2380 team = team_nl_team_get(info);
2381 if (!team)
2382 return -EINVAL;
2383
2384 list_for_each_entry(opt_inst, &team->option_inst_list, list)
2385 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2386 err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2387 NLM_F_ACK, team_nl_send_unicast,
2388 &sel_opt_inst_list);
2389
2390 team_nl_team_put(team);
2391
2392 return err;
2393 }
2394
2395 static int team_nl_send_event_options_get(struct team *team,
2396 struct list_head *sel_opt_inst_list);
2397
2398 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2399 {
2400 struct team *team;
2401 int err = 0;
2402 int i;
2403 struct nlattr *nl_option;
2404 LIST_HEAD(opt_inst_list);
2405
2406 team = team_nl_team_get(info);
2407 if (!team)
2408 return -EINVAL;
2409
2410 err = -EINVAL;
2411 if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2412 err = -EINVAL;
2413 goto team_put;
2414 }
2415
2416 nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2417 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2418 struct nlattr *attr;
2419 struct nlattr *attr_data;
2420 enum team_option_type opt_type;
2421 int opt_port_ifindex = 0; /* != 0 for per-port options */
2422 u32 opt_array_index = 0;
2423 bool opt_is_array = false;
2424 struct team_option_inst *opt_inst;
2425 char *opt_name;
2426 bool opt_found = false;
2427
2428 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2429 err = -EINVAL;
2430 goto team_put;
2431 }
2432 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2433 nl_option, team_nl_option_policy);
2434 if (err)
2435 goto team_put;
2436 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2437 !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2438 err = -EINVAL;
2439 goto team_put;
2440 }
2441 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2442 case NLA_U32:
2443 opt_type = TEAM_OPTION_TYPE_U32;
2444 break;
2445 case NLA_STRING:
2446 opt_type = TEAM_OPTION_TYPE_STRING;
2447 break;
2448 case NLA_BINARY:
2449 opt_type = TEAM_OPTION_TYPE_BINARY;
2450 break;
2451 case NLA_FLAG:
2452 opt_type = TEAM_OPTION_TYPE_BOOL;
2453 break;
2454 case NLA_S32:
2455 opt_type = TEAM_OPTION_TYPE_S32;
2456 break;
2457 default:
2458 goto team_put;
2459 }
2460
2461 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2462 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2463 err = -EINVAL;
2464 goto team_put;
2465 }
2466
2467 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2468 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2469 if (attr)
2470 opt_port_ifindex = nla_get_u32(attr);
2471
2472 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2473 if (attr) {
2474 opt_is_array = true;
2475 opt_array_index = nla_get_u32(attr);
2476 }
2477
2478 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2479 struct team_option *option = opt_inst->option;
2480 struct team_gsetter_ctx ctx;
2481 struct team_option_inst_info *opt_inst_info;
2482 int tmp_ifindex;
2483
2484 opt_inst_info = &opt_inst->info;
2485 tmp_ifindex = opt_inst_info->port ?
2486 opt_inst_info->port->dev->ifindex : 0;
2487 if (option->type != opt_type ||
2488 strcmp(option->name, opt_name) ||
2489 tmp_ifindex != opt_port_ifindex ||
2490 (option->array_size && !opt_is_array) ||
2491 opt_inst_info->array_index != opt_array_index)
2492 continue;
2493 opt_found = true;
2494 ctx.info = opt_inst_info;
2495 switch (opt_type) {
2496 case TEAM_OPTION_TYPE_U32:
2497 ctx.data.u32_val = nla_get_u32(attr_data);
2498 break;
2499 case TEAM_OPTION_TYPE_STRING:
2500 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2501 err = -EINVAL;
2502 goto team_put;
2503 }
2504 ctx.data.str_val = nla_data(attr_data);
2505 break;
2506 case TEAM_OPTION_TYPE_BINARY:
2507 ctx.data.bin_val.len = nla_len(attr_data);
2508 ctx.data.bin_val.ptr = nla_data(attr_data);
2509 break;
2510 case TEAM_OPTION_TYPE_BOOL:
2511 ctx.data.bool_val = attr_data ? true : false;
2512 break;
2513 case TEAM_OPTION_TYPE_S32:
2514 ctx.data.s32_val = nla_get_s32(attr_data);
2515 break;
2516 default:
2517 BUG();
2518 }
2519 err = team_option_set(team, opt_inst, &ctx);
2520 if (err)
2521 goto team_put;
2522 opt_inst->changed = true;
2523 list_add(&opt_inst->tmp_list, &opt_inst_list);
2524 }
2525 if (!opt_found) {
2526 err = -ENOENT;
2527 goto team_put;
2528 }
2529 }
2530
2531 err = team_nl_send_event_options_get(team, &opt_inst_list);
2532
2533 team_put:
2534 team_nl_team_put(team);
2535
2536 return err;
2537 }
2538
2539 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2540 struct team_port *port)
2541 {
2542 struct nlattr *port_item;
2543
2544 port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2545 if (!port_item)
2546 goto nest_cancel;
2547 if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2548 goto nest_cancel;
2549 if (port->changed) {
2550 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2551 goto nest_cancel;
2552 port->changed = false;
2553 }
2554 if ((port->removed &&
2555 nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2556 (port->state.linkup &&
2557 nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2558 nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2559 nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2560 goto nest_cancel;
2561 nla_nest_end(skb, port_item);
2562 return 0;
2563
2564 nest_cancel:
2565 nla_nest_cancel(skb, port_item);
2566 return -EMSGSIZE;
2567 }
2568
2569 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2570 int flags, team_nl_send_func_t *send_func,
2571 struct team_port *one_port)
2572 {
2573 struct nlattr *port_list;
2574 struct nlmsghdr *nlh;
2575 void *hdr;
2576 struct team_port *port;
2577 int err;
2578 struct sk_buff *skb = NULL;
2579 bool incomplete;
2580 int i;
2581
2582 port = list_first_entry_or_null(&team->port_list,
2583 struct team_port, list);
2584
2585 start_again:
2586 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2587 if (err)
2588 return err;
2589
2590 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2591 TEAM_CMD_PORT_LIST_GET);
2592 if (!hdr)
2593 return -EMSGSIZE;
2594
2595 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2596 goto nla_put_failure;
2597 port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2598 if (!port_list)
2599 goto nla_put_failure;
2600
2601 i = 0;
2602 incomplete = false;
2603
2604 /* If one port is selected, called wants to send port list containing
2605 * only this port. Otherwise go through all listed ports and send all
2606 */
2607 if (one_port) {
2608 err = team_nl_fill_one_port_get(skb, one_port);
2609 if (err)
2610 goto errout;
2611 } else if (port) {
2612 list_for_each_entry_from(port, &team->port_list, list) {
2613 err = team_nl_fill_one_port_get(skb, port);
2614 if (err) {
2615 if (err == -EMSGSIZE) {
2616 if (!i)
2617 goto errout;
2618 incomplete = true;
2619 break;
2620 }
2621 goto errout;
2622 }
2623 i++;
2624 }
2625 }
2626
2627 nla_nest_end(skb, port_list);
2628 genlmsg_end(skb, hdr);
2629 if (incomplete)
2630 goto start_again;
2631
2632 send_done:
2633 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2634 if (!nlh) {
2635 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2636 if (err)
2637 goto errout;
2638 goto send_done;
2639 }
2640
2641 return send_func(skb, team, portid);
2642
2643 nla_put_failure:
2644 err = -EMSGSIZE;
2645 errout:
2646 genlmsg_cancel(skb, hdr);
2647 nlmsg_free(skb);
2648 return err;
2649 }
2650
2651 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2652 struct genl_info *info)
2653 {
2654 struct team *team;
2655 int err;
2656
2657 team = team_nl_team_get(info);
2658 if (!team)
2659 return -EINVAL;
2660
2661 err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2662 NLM_F_ACK, team_nl_send_unicast, NULL);
2663
2664 team_nl_team_put(team);
2665
2666 return err;
2667 }
2668
2669 static const struct genl_ops team_nl_ops[] = {
2670 {
2671 .cmd = TEAM_CMD_NOOP,
2672 .doit = team_nl_cmd_noop,
2673 .policy = team_nl_policy,
2674 },
2675 {
2676 .cmd = TEAM_CMD_OPTIONS_SET,
2677 .doit = team_nl_cmd_options_set,
2678 .policy = team_nl_policy,
2679 .flags = GENL_ADMIN_PERM,
2680 },
2681 {
2682 .cmd = TEAM_CMD_OPTIONS_GET,
2683 .doit = team_nl_cmd_options_get,
2684 .policy = team_nl_policy,
2685 .flags = GENL_ADMIN_PERM,
2686 },
2687 {
2688 .cmd = TEAM_CMD_PORT_LIST_GET,
2689 .doit = team_nl_cmd_port_list_get,
2690 .policy = team_nl_policy,
2691 .flags = GENL_ADMIN_PERM,
2692 },
2693 };
2694
2695 static const struct genl_multicast_group team_nl_mcgrps[] = {
2696 { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2697 };
2698
2699 static int team_nl_send_multicast(struct sk_buff *skb,
2700 struct team *team, u32 portid)
2701 {
2702 return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2703 skb, 0, 0, GFP_KERNEL);
2704 }
2705
2706 static int team_nl_send_event_options_get(struct team *team,
2707 struct list_head *sel_opt_inst_list)
2708 {
2709 return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2710 sel_opt_inst_list);
2711 }
2712
2713 static int team_nl_send_event_port_get(struct team *team,
2714 struct team_port *port)
2715 {
2716 return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2717 port);
2718 }
2719
2720 static int team_nl_init(void)
2721 {
2722 return genl_register_family_with_ops_groups(&team_nl_family, team_nl_ops,
2723 team_nl_mcgrps);
2724 }
2725
2726 static void team_nl_fini(void)
2727 {
2728 genl_unregister_family(&team_nl_family);
2729 }
2730
2731
2732 /******************
2733 * Change checkers
2734 ******************/
2735
2736 static void __team_options_change_check(struct team *team)
2737 {
2738 int err;
2739 struct team_option_inst *opt_inst;
2740 LIST_HEAD(sel_opt_inst_list);
2741
2742 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2743 if (opt_inst->changed)
2744 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2745 }
2746 err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2747 if (err && err != -ESRCH)
2748 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2749 err);
2750 }
2751
2752 /* rtnl lock is held */
2753
2754 static void __team_port_change_send(struct team_port *port, bool linkup)
2755 {
2756 int err;
2757
2758 port->changed = true;
2759 port->state.linkup = linkup;
2760 team_refresh_port_linkup(port);
2761 if (linkup) {
2762 struct ethtool_cmd ecmd;
2763
2764 err = __ethtool_get_settings(port->dev, &ecmd);
2765 if (!err) {
2766 port->state.speed = ethtool_cmd_speed(&ecmd);
2767 port->state.duplex = ecmd.duplex;
2768 goto send_event;
2769 }
2770 }
2771 port->state.speed = 0;
2772 port->state.duplex = 0;
2773
2774 send_event:
2775 err = team_nl_send_event_port_get(port->team, port);
2776 if (err && err != -ESRCH)
2777 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2778 port->dev->name, err);
2779
2780 }
2781
2782 static void __team_carrier_check(struct team *team)
2783 {
2784 struct team_port *port;
2785 bool team_linkup;
2786
2787 if (team->user_carrier_enabled)
2788 return;
2789
2790 team_linkup = false;
2791 list_for_each_entry(port, &team->port_list, list) {
2792 if (port->linkup) {
2793 team_linkup = true;
2794 break;
2795 }
2796 }
2797
2798 if (team_linkup)
2799 netif_carrier_on(team->dev);
2800 else
2801 netif_carrier_off(team->dev);
2802 }
2803
2804 static void __team_port_change_check(struct team_port *port, bool linkup)
2805 {
2806 if (port->state.linkup != linkup)
2807 __team_port_change_send(port, linkup);
2808 __team_carrier_check(port->team);
2809 }
2810
2811 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2812 {
2813 __team_port_change_send(port, linkup);
2814 __team_carrier_check(port->team);
2815 }
2816
2817 static void __team_port_change_port_removed(struct team_port *port)
2818 {
2819 port->removed = true;
2820 __team_port_change_send(port, false);
2821 __team_carrier_check(port->team);
2822 }
2823
2824 static void team_port_change_check(struct team_port *port, bool linkup)
2825 {
2826 struct team *team = port->team;
2827
2828 mutex_lock(&team->lock);
2829 __team_port_change_check(port, linkup);
2830 mutex_unlock(&team->lock);
2831 }
2832
2833
2834 /************************************
2835 * Net device notifier event handler
2836 ************************************/
2837
2838 static int team_device_event(struct notifier_block *unused,
2839 unsigned long event, void *ptr)
2840 {
2841 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2842 struct team_port *port;
2843
2844 port = team_port_get_rtnl(dev);
2845 if (!port)
2846 return NOTIFY_DONE;
2847
2848 switch (event) {
2849 case NETDEV_UP:
2850 if (netif_carrier_ok(dev))
2851 team_port_change_check(port, true);
2852 break;
2853 case NETDEV_DOWN:
2854 team_port_change_check(port, false);
2855 break;
2856 case NETDEV_CHANGE:
2857 if (netif_running(port->dev))
2858 team_port_change_check(port,
2859 !!netif_carrier_ok(port->dev));
2860 break;
2861 case NETDEV_UNREGISTER:
2862 team_del_slave(port->team->dev, dev);
2863 break;
2864 case NETDEV_FEAT_CHANGE:
2865 team_compute_features(port->team);
2866 break;
2867 case NETDEV_PRECHANGEMTU:
2868 /* Forbid to change mtu of underlaying device */
2869 if (!port->team->port_mtu_change_allowed)
2870 return NOTIFY_BAD;
2871 break;
2872 case NETDEV_PRE_TYPE_CHANGE:
2873 /* Forbid to change type of underlaying device */
2874 return NOTIFY_BAD;
2875 case NETDEV_RESEND_IGMP:
2876 /* Propagate to master device */
2877 call_netdevice_notifiers(event, port->team->dev);
2878 break;
2879 }
2880 return NOTIFY_DONE;
2881 }
2882
2883 static struct notifier_block team_notifier_block __read_mostly = {
2884 .notifier_call = team_device_event,
2885 };
2886
2887
2888 /***********************
2889 * Module init and exit
2890 ***********************/
2891
2892 static int __init team_module_init(void)
2893 {
2894 int err;
2895
2896 register_netdevice_notifier(&team_notifier_block);
2897
2898 err = rtnl_link_register(&team_link_ops);
2899 if (err)
2900 goto err_rtnl_reg;
2901
2902 err = team_nl_init();
2903 if (err)
2904 goto err_nl_init;
2905
2906 return 0;
2907
2908 err_nl_init:
2909 rtnl_link_unregister(&team_link_ops);
2910
2911 err_rtnl_reg:
2912 unregister_netdevice_notifier(&team_notifier_block);
2913
2914 return err;
2915 }
2916
2917 static void __exit team_module_exit(void)
2918 {
2919 team_nl_fini();
2920 rtnl_link_unregister(&team_link_ops);
2921 unregister_netdevice_notifier(&team_notifier_block);
2922 }
2923
2924 module_init(team_module_init);
2925 module_exit(team_module_exit);
2926
2927 MODULE_LICENSE("GPL v2");
2928 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
2929 MODULE_DESCRIPTION("Ethernet team device driver");
2930 MODULE_ALIAS_RTNL_LINK(DRV_NAME);
Linux kernel - Deliverables
This page took 0.156718 seconds and 5 git commands to generate.