Loading...
Note: File does not exist in v6.13.7.
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 <net/switchdev.h>
32#include <generated/utsrelease.h>
33#include <linux/if_team.h>
34
35#define DRV_NAME "team"
36
37
38/**********
39 * Helpers
40 **********/
41
42#define team_port_exists(dev) (dev->priv_flags & IFF_TEAM_PORT)
43
44static struct team_port *team_port_get_rcu(const struct net_device *dev)
45{
46 return rcu_dereference(dev->rx_handler_data);
47}
48
49static struct team_port *team_port_get_rtnl(const struct net_device *dev)
50{
51 struct team_port *port = rtnl_dereference(dev->rx_handler_data);
52
53 return team_port_exists(dev) ? port : NULL;
54}
55
56/*
57 * Since the ability to change device address for open port device is tested in
58 * team_port_add, this function can be called without control of return value
59 */
60static int __set_port_dev_addr(struct net_device *port_dev,
61 const unsigned char *dev_addr)
62{
63 struct sockaddr addr;
64
65 memcpy(addr.sa_data, dev_addr, port_dev->addr_len);
66 addr.sa_family = port_dev->type;
67 return dev_set_mac_address(port_dev, &addr);
68}
69
70static int team_port_set_orig_dev_addr(struct team_port *port)
71{
72 return __set_port_dev_addr(port->dev, port->orig.dev_addr);
73}
74
75static int team_port_set_team_dev_addr(struct team *team,
76 struct team_port *port)
77{
78 return __set_port_dev_addr(port->dev, team->dev->dev_addr);
79}
80
81int team_modeop_port_enter(struct team *team, struct team_port *port)
82{
83 return team_port_set_team_dev_addr(team, port);
84}
85EXPORT_SYMBOL(team_modeop_port_enter);
86
87void team_modeop_port_change_dev_addr(struct team *team,
88 struct team_port *port)
89{
90 team_port_set_team_dev_addr(team, port);
91}
92EXPORT_SYMBOL(team_modeop_port_change_dev_addr);
93
94static void team_lower_state_changed(struct team_port *port)
95{
96 struct netdev_lag_lower_state_info info;
97
98 info.link_up = port->linkup;
99 info.tx_enabled = team_port_enabled(port);
100 netdev_lower_state_changed(port->dev, &info);
101}
102
103static void team_refresh_port_linkup(struct team_port *port)
104{
105 bool new_linkup = port->user.linkup_enabled ? port->user.linkup :
106 port->state.linkup;
107
108 if (port->linkup != new_linkup) {
109 port->linkup = new_linkup;
110 team_lower_state_changed(port);
111 }
112}
113
114
115/*******************
116 * Options handling
117 *******************/
118
119struct team_option_inst { /* One for each option instance */
120 struct list_head list;
121 struct list_head tmp_list;
122 struct team_option *option;
123 struct team_option_inst_info info;
124 bool changed;
125 bool removed;
126};
127
128static struct team_option *__team_find_option(struct team *team,
129 const char *opt_name)
130{
131 struct team_option *option;
132
133 list_for_each_entry(option, &team->option_list, list) {
134 if (strcmp(option->name, opt_name) == 0)
135 return option;
136 }
137 return NULL;
138}
139
140static void __team_option_inst_del(struct team_option_inst *opt_inst)
141{
142 list_del(&opt_inst->list);
143 kfree(opt_inst);
144}
145
146static void __team_option_inst_del_option(struct team *team,
147 struct team_option *option)
148{
149 struct team_option_inst *opt_inst, *tmp;
150
151 list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
152 if (opt_inst->option == option)
153 __team_option_inst_del(opt_inst);
154 }
155}
156
157static int __team_option_inst_add(struct team *team, struct team_option *option,
158 struct team_port *port)
159{
160 struct team_option_inst *opt_inst;
161 unsigned int array_size;
162 unsigned int i;
163 int err;
164
165 array_size = option->array_size;
166 if (!array_size)
167 array_size = 1; /* No array but still need one instance */
168
169 for (i = 0; i < array_size; i++) {
170 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL);
171 if (!opt_inst)
172 return -ENOMEM;
173 opt_inst->option = option;
174 opt_inst->info.port = port;
175 opt_inst->info.array_index = i;
176 opt_inst->changed = true;
177 opt_inst->removed = false;
178 list_add_tail(&opt_inst->list, &team->option_inst_list);
179 if (option->init) {
180 err = option->init(team, &opt_inst->info);
181 if (err)
182 return err;
183 }
184
185 }
186 return 0;
187}
188
189static int __team_option_inst_add_option(struct team *team,
190 struct team_option *option)
191{
192 int err;
193
194 if (!option->per_port) {
195 err = __team_option_inst_add(team, option, NULL);
196 if (err)
197 goto inst_del_option;
198 }
199 return 0;
200
201inst_del_option:
202 __team_option_inst_del_option(team, option);
203 return err;
204}
205
206static void __team_option_inst_mark_removed_option(struct team *team,
207 struct team_option *option)
208{
209 struct team_option_inst *opt_inst;
210
211 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
212 if (opt_inst->option == option) {
213 opt_inst->changed = true;
214 opt_inst->removed = true;
215 }
216 }
217}
218
219static void __team_option_inst_del_port(struct team *team,
220 struct team_port *port)
221{
222 struct team_option_inst *opt_inst, *tmp;
223
224 list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
225 if (opt_inst->option->per_port &&
226 opt_inst->info.port == port)
227 __team_option_inst_del(opt_inst);
228 }
229}
230
231static int __team_option_inst_add_port(struct team *team,
232 struct team_port *port)
233{
234 struct team_option *option;
235 int err;
236
237 list_for_each_entry(option, &team->option_list, list) {
238 if (!option->per_port)
239 continue;
240 err = __team_option_inst_add(team, option, port);
241 if (err)
242 goto inst_del_port;
243 }
244 return 0;
245
246inst_del_port:
247 __team_option_inst_del_port(team, port);
248 return err;
249}
250
251static void __team_option_inst_mark_removed_port(struct team *team,
252 struct team_port *port)
253{
254 struct team_option_inst *opt_inst;
255
256 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
257 if (opt_inst->info.port == port) {
258 opt_inst->changed = true;
259 opt_inst->removed = true;
260 }
261 }
262}
263
264static int __team_options_register(struct team *team,
265 const struct team_option *option,
266 size_t option_count)
267{
268 int i;
269 struct team_option **dst_opts;
270 int err;
271
272 dst_opts = kzalloc(sizeof(struct team_option *) * option_count,
273 GFP_KERNEL);
274 if (!dst_opts)
275 return -ENOMEM;
276 for (i = 0; i < option_count; i++, option++) {
277 if (__team_find_option(team, option->name)) {
278 err = -EEXIST;
279 goto alloc_rollback;
280 }
281 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
282 if (!dst_opts[i]) {
283 err = -ENOMEM;
284 goto alloc_rollback;
285 }
286 }
287
288 for (i = 0; i < option_count; i++) {
289 err = __team_option_inst_add_option(team, dst_opts[i]);
290 if (err)
291 goto inst_rollback;
292 list_add_tail(&dst_opts[i]->list, &team->option_list);
293 }
294
295 kfree(dst_opts);
296 return 0;
297
298inst_rollback:
299 for (i--; i >= 0; i--)
300 __team_option_inst_del_option(team, dst_opts[i]);
301
302 i = option_count - 1;
303alloc_rollback:
304 for (i--; i >= 0; i--)
305 kfree(dst_opts[i]);
306
307 kfree(dst_opts);
308 return err;
309}
310
311static void __team_options_mark_removed(struct team *team,
312 const struct team_option *option,
313 size_t option_count)
314{
315 int i;
316
317 for (i = 0; i < option_count; i++, option++) {
318 struct team_option *del_opt;
319
320 del_opt = __team_find_option(team, option->name);
321 if (del_opt)
322 __team_option_inst_mark_removed_option(team, del_opt);
323 }
324}
325
326static void __team_options_unregister(struct team *team,
327 const struct team_option *option,
328 size_t option_count)
329{
330 int i;
331
332 for (i = 0; i < option_count; i++, option++) {
333 struct team_option *del_opt;
334
335 del_opt = __team_find_option(team, option->name);
336 if (del_opt) {
337 __team_option_inst_del_option(team, del_opt);
338 list_del(&del_opt->list);
339 kfree(del_opt);
340 }
341 }
342}
343
344static void __team_options_change_check(struct team *team);
345
346int team_options_register(struct team *team,
347 const struct team_option *option,
348 size_t option_count)
349{
350 int err;
351
352 err = __team_options_register(team, option, option_count);
353 if (err)
354 return err;
355 __team_options_change_check(team);
356 return 0;
357}
358EXPORT_SYMBOL(team_options_register);
359
360void team_options_unregister(struct team *team,
361 const struct team_option *option,
362 size_t option_count)
363{
364 __team_options_mark_removed(team, option, option_count);
365 __team_options_change_check(team);
366 __team_options_unregister(team, option, option_count);
367}
368EXPORT_SYMBOL(team_options_unregister);
369
370static int team_option_get(struct team *team,
371 struct team_option_inst *opt_inst,
372 struct team_gsetter_ctx *ctx)
373{
374 if (!opt_inst->option->getter)
375 return -EOPNOTSUPP;
376 return opt_inst->option->getter(team, ctx);
377}
378
379static int team_option_set(struct team *team,
380 struct team_option_inst *opt_inst,
381 struct team_gsetter_ctx *ctx)
382{
383 if (!opt_inst->option->setter)
384 return -EOPNOTSUPP;
385 return opt_inst->option->setter(team, ctx);
386}
387
388void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info)
389{
390 struct team_option_inst *opt_inst;
391
392 opt_inst = container_of(opt_inst_info, struct team_option_inst, info);
393 opt_inst->changed = true;
394}
395EXPORT_SYMBOL(team_option_inst_set_change);
396
397void team_options_change_check(struct team *team)
398{
399 __team_options_change_check(team);
400}
401EXPORT_SYMBOL(team_options_change_check);
402
403
404/****************
405 * Mode handling
406 ****************/
407
408static LIST_HEAD(mode_list);
409static DEFINE_SPINLOCK(mode_list_lock);
410
411struct team_mode_item {
412 struct list_head list;
413 const struct team_mode *mode;
414};
415
416static struct team_mode_item *__find_mode(const char *kind)
417{
418 struct team_mode_item *mitem;
419
420 list_for_each_entry(mitem, &mode_list, list) {
421 if (strcmp(mitem->mode->kind, kind) == 0)
422 return mitem;
423 }
424 return NULL;
425}
426
427static bool is_good_mode_name(const char *name)
428{
429 while (*name != '\0') {
430 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
431 return false;
432 name++;
433 }
434 return true;
435}
436
437int team_mode_register(const struct team_mode *mode)
438{
439 int err = 0;
440 struct team_mode_item *mitem;
441
442 if (!is_good_mode_name(mode->kind) ||
443 mode->priv_size > TEAM_MODE_PRIV_SIZE)
444 return -EINVAL;
445
446 mitem = kmalloc(sizeof(*mitem), GFP_KERNEL);
447 if (!mitem)
448 return -ENOMEM;
449
450 spin_lock(&mode_list_lock);
451 if (__find_mode(mode->kind)) {
452 err = -EEXIST;
453 kfree(mitem);
454 goto unlock;
455 }
456 mitem->mode = mode;
457 list_add_tail(&mitem->list, &mode_list);
458unlock:
459 spin_unlock(&mode_list_lock);
460 return err;
461}
462EXPORT_SYMBOL(team_mode_register);
463
464void team_mode_unregister(const struct team_mode *mode)
465{
466 struct team_mode_item *mitem;
467
468 spin_lock(&mode_list_lock);
469 mitem = __find_mode(mode->kind);
470 if (mitem) {
471 list_del_init(&mitem->list);
472 kfree(mitem);
473 }
474 spin_unlock(&mode_list_lock);
475}
476EXPORT_SYMBOL(team_mode_unregister);
477
478static const struct team_mode *team_mode_get(const char *kind)
479{
480 struct team_mode_item *mitem;
481 const struct team_mode *mode = NULL;
482
483 spin_lock(&mode_list_lock);
484 mitem = __find_mode(kind);
485 if (!mitem) {
486 spin_unlock(&mode_list_lock);
487 request_module("team-mode-%s", kind);
488 spin_lock(&mode_list_lock);
489 mitem = __find_mode(kind);
490 }
491 if (mitem) {
492 mode = mitem->mode;
493 if (!try_module_get(mode->owner))
494 mode = NULL;
495 }
496
497 spin_unlock(&mode_list_lock);
498 return mode;
499}
500
501static void team_mode_put(const struct team_mode *mode)
502{
503 module_put(mode->owner);
504}
505
506static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
507{
508 dev_kfree_skb_any(skb);
509 return false;
510}
511
512static rx_handler_result_t team_dummy_receive(struct team *team,
513 struct team_port *port,
514 struct sk_buff *skb)
515{
516 return RX_HANDLER_ANOTHER;
517}
518
519static const struct team_mode __team_no_mode = {
520 .kind = "*NOMODE*",
521};
522
523static bool team_is_mode_set(struct team *team)
524{
525 return team->mode != &__team_no_mode;
526}
527
528static void team_set_no_mode(struct team *team)
529{
530 team->user_carrier_enabled = false;
531 team->mode = &__team_no_mode;
532}
533
534static void team_adjust_ops(struct team *team)
535{
536 /*
537 * To avoid checks in rx/tx skb paths, ensure here that non-null and
538 * correct ops are always set.
539 */
540
541 if (!team->en_port_count || !team_is_mode_set(team) ||
542 !team->mode->ops->transmit)
543 team->ops.transmit = team_dummy_transmit;
544 else
545 team->ops.transmit = team->mode->ops->transmit;
546
547 if (!team->en_port_count || !team_is_mode_set(team) ||
548 !team->mode->ops->receive)
549 team->ops.receive = team_dummy_receive;
550 else
551 team->ops.receive = team->mode->ops->receive;
552}
553
554/*
555 * We can benefit from the fact that it's ensured no port is present
556 * at the time of mode change. Therefore no packets are in fly so there's no
557 * need to set mode operations in any special way.
558 */
559static int __team_change_mode(struct team *team,
560 const struct team_mode *new_mode)
561{
562 /* Check if mode was previously set and do cleanup if so */
563 if (team_is_mode_set(team)) {
564 void (*exit_op)(struct team *team) = team->ops.exit;
565
566 /* Clear ops area so no callback is called any longer */
567 memset(&team->ops, 0, sizeof(struct team_mode_ops));
568 team_adjust_ops(team);
569
570 if (exit_op)
571 exit_op(team);
572 team_mode_put(team->mode);
573 team_set_no_mode(team);
574 /* zero private data area */
575 memset(&team->mode_priv, 0,
576 sizeof(struct team) - offsetof(struct team, mode_priv));
577 }
578
579 if (!new_mode)
580 return 0;
581
582 if (new_mode->ops->init) {
583 int err;
584
585 err = new_mode->ops->init(team);
586 if (err)
587 return err;
588 }
589
590 team->mode = new_mode;
591 memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
592 team_adjust_ops(team);
593
594 return 0;
595}
596
597static int team_change_mode(struct team *team, const char *kind)
598{
599 const struct team_mode *new_mode;
600 struct net_device *dev = team->dev;
601 int err;
602
603 if (!list_empty(&team->port_list)) {
604 netdev_err(dev, "No ports can be present during mode change\n");
605 return -EBUSY;
606 }
607
608 if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) {
609 netdev_err(dev, "Unable to change to the same mode the team is in\n");
610 return -EINVAL;
611 }
612
613 new_mode = team_mode_get(kind);
614 if (!new_mode) {
615 netdev_err(dev, "Mode \"%s\" not found\n", kind);
616 return -EINVAL;
617 }
618
619 err = __team_change_mode(team, new_mode);
620 if (err) {
621 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
622 team_mode_put(new_mode);
623 return err;
624 }
625
626 netdev_info(dev, "Mode changed to \"%s\"\n", kind);
627 return 0;
628}
629
630
631/*********************
632 * Peers notification
633 *********************/
634
635static void team_notify_peers_work(struct work_struct *work)
636{
637 struct team *team;
638 int val;
639
640 team = container_of(work, struct team, notify_peers.dw.work);
641
642 if (!rtnl_trylock()) {
643 schedule_delayed_work(&team->notify_peers.dw, 0);
644 return;
645 }
646 val = atomic_dec_if_positive(&team->notify_peers.count_pending);
647 if (val < 0) {
648 rtnl_unlock();
649 return;
650 }
651 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, team->dev);
652 rtnl_unlock();
653 if (val)
654 schedule_delayed_work(&team->notify_peers.dw,
655 msecs_to_jiffies(team->notify_peers.interval));
656}
657
658static void team_notify_peers(struct team *team)
659{
660 if (!team->notify_peers.count || !netif_running(team->dev))
661 return;
662 atomic_add(team->notify_peers.count, &team->notify_peers.count_pending);
663 schedule_delayed_work(&team->notify_peers.dw, 0);
664}
665
666static void team_notify_peers_init(struct team *team)
667{
668 INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work);
669}
670
671static void team_notify_peers_fini(struct team *team)
672{
673 cancel_delayed_work_sync(&team->notify_peers.dw);
674}
675
676
677/*******************************
678 * Send multicast group rejoins
679 *******************************/
680
681static void team_mcast_rejoin_work(struct work_struct *work)
682{
683 struct team *team;
684 int val;
685
686 team = container_of(work, struct team, mcast_rejoin.dw.work);
687
688 if (!rtnl_trylock()) {
689 schedule_delayed_work(&team->mcast_rejoin.dw, 0);
690 return;
691 }
692 val = atomic_dec_if_positive(&team->mcast_rejoin.count_pending);
693 if (val < 0) {
694 rtnl_unlock();
695 return;
696 }
697 call_netdevice_notifiers(NETDEV_RESEND_IGMP, team->dev);
698 rtnl_unlock();
699 if (val)
700 schedule_delayed_work(&team->mcast_rejoin.dw,
701 msecs_to_jiffies(team->mcast_rejoin.interval));
702}
703
704static void team_mcast_rejoin(struct team *team)
705{
706 if (!team->mcast_rejoin.count || !netif_running(team->dev))
707 return;
708 atomic_add(team->mcast_rejoin.count, &team->mcast_rejoin.count_pending);
709 schedule_delayed_work(&team->mcast_rejoin.dw, 0);
710}
711
712static void team_mcast_rejoin_init(struct team *team)
713{
714 INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work);
715}
716
717static void team_mcast_rejoin_fini(struct team *team)
718{
719 cancel_delayed_work_sync(&team->mcast_rejoin.dw);
720}
721
722
723/************************
724 * Rx path frame handler
725 ************************/
726
727/* note: already called with rcu_read_lock */
728static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
729{
730 struct sk_buff *skb = *pskb;
731 struct team_port *port;
732 struct team *team;
733 rx_handler_result_t res;
734
735 skb = skb_share_check(skb, GFP_ATOMIC);
736 if (!skb)
737 return RX_HANDLER_CONSUMED;
738
739 *pskb = skb;
740
741 port = team_port_get_rcu(skb->dev);
742 team = port->team;
743 if (!team_port_enabled(port)) {
744 /* allow exact match delivery for disabled ports */
745 res = RX_HANDLER_EXACT;
746 } else {
747 res = team->ops.receive(team, port, skb);
748 }
749 if (res == RX_HANDLER_ANOTHER) {
750 struct team_pcpu_stats *pcpu_stats;
751
752 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
753 u64_stats_update_begin(&pcpu_stats->syncp);
754 pcpu_stats->rx_packets++;
755 pcpu_stats->rx_bytes += skb->len;
756 if (skb->pkt_type == PACKET_MULTICAST)
757 pcpu_stats->rx_multicast++;
758 u64_stats_update_end(&pcpu_stats->syncp);
759
760 skb->dev = team->dev;
761 } else if (res == RX_HANDLER_EXACT) {
762 this_cpu_inc(team->pcpu_stats->rx_nohandler);
763 } else {
764 this_cpu_inc(team->pcpu_stats->rx_dropped);
765 }
766
767 return res;
768}
769
770
771/*************************************
772 * Multiqueue Tx port select override
773 *************************************/
774
775static int team_queue_override_init(struct team *team)
776{
777 struct list_head *listarr;
778 unsigned int queue_cnt = team->dev->num_tx_queues - 1;
779 unsigned int i;
780
781 if (!queue_cnt)
782 return 0;
783 listarr = kmalloc(sizeof(struct list_head) * queue_cnt, GFP_KERNEL);
784 if (!listarr)
785 return -ENOMEM;
786 team->qom_lists = listarr;
787 for (i = 0; i < queue_cnt; i++)
788 INIT_LIST_HEAD(listarr++);
789 return 0;
790}
791
792static void team_queue_override_fini(struct team *team)
793{
794 kfree(team->qom_lists);
795}
796
797static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
798{
799 return &team->qom_lists[queue_id - 1];
800}
801
802/*
803 * note: already called with rcu_read_lock
804 */
805static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
806{
807 struct list_head *qom_list;
808 struct team_port *port;
809
810 if (!team->queue_override_enabled || !skb->queue_mapping)
811 return false;
812 qom_list = __team_get_qom_list(team, skb->queue_mapping);
813 list_for_each_entry_rcu(port, qom_list, qom_list) {
814 if (!team_dev_queue_xmit(team, port, skb))
815 return true;
816 }
817 return false;
818}
819
820static void __team_queue_override_port_del(struct team *team,
821 struct team_port *port)
822{
823 if (!port->queue_id)
824 return;
825 list_del_rcu(&port->qom_list);
826}
827
828static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
829 struct team_port *cur)
830{
831 if (port->priority < cur->priority)
832 return true;
833 if (port->priority > cur->priority)
834 return false;
835 if (port->index < cur->index)
836 return true;
837 return false;
838}
839
840static void __team_queue_override_port_add(struct team *team,
841 struct team_port *port)
842{
843 struct team_port *cur;
844 struct list_head *qom_list;
845 struct list_head *node;
846
847 if (!port->queue_id)
848 return;
849 qom_list = __team_get_qom_list(team, port->queue_id);
850 node = qom_list;
851 list_for_each_entry(cur, qom_list, qom_list) {
852 if (team_queue_override_port_has_gt_prio_than(port, cur))
853 break;
854 node = &cur->qom_list;
855 }
856 list_add_tail_rcu(&port->qom_list, node);
857}
858
859static void __team_queue_override_enabled_check(struct team *team)
860{
861 struct team_port *port;
862 bool enabled = false;
863
864 list_for_each_entry(port, &team->port_list, list) {
865 if (port->queue_id) {
866 enabled = true;
867 break;
868 }
869 }
870 if (enabled == team->queue_override_enabled)
871 return;
872 netdev_dbg(team->dev, "%s queue override\n",
873 enabled ? "Enabling" : "Disabling");
874 team->queue_override_enabled = enabled;
875}
876
877static void team_queue_override_port_prio_changed(struct team *team,
878 struct team_port *port)
879{
880 if (!port->queue_id || team_port_enabled(port))
881 return;
882 __team_queue_override_port_del(team, port);
883 __team_queue_override_port_add(team, port);
884 __team_queue_override_enabled_check(team);
885}
886
887static void team_queue_override_port_change_queue_id(struct team *team,
888 struct team_port *port,
889 u16 new_queue_id)
890{
891 if (team_port_enabled(port)) {
892 __team_queue_override_port_del(team, port);
893 port->queue_id = new_queue_id;
894 __team_queue_override_port_add(team, port);
895 __team_queue_override_enabled_check(team);
896 } else {
897 port->queue_id = new_queue_id;
898 }
899}
900
901static void team_queue_override_port_add(struct team *team,
902 struct team_port *port)
903{
904 __team_queue_override_port_add(team, port);
905 __team_queue_override_enabled_check(team);
906}
907
908static void team_queue_override_port_del(struct team *team,
909 struct team_port *port)
910{
911 __team_queue_override_port_del(team, port);
912 __team_queue_override_enabled_check(team);
913}
914
915
916/****************
917 * Port handling
918 ****************/
919
920static bool team_port_find(const struct team *team,
921 const struct team_port *port)
922{
923 struct team_port *cur;
924
925 list_for_each_entry(cur, &team->port_list, list)
926 if (cur == port)
927 return true;
928 return false;
929}
930
931/*
932 * Enable/disable port by adding to enabled port hashlist and setting
933 * port->index (Might be racy so reader could see incorrect ifindex when
934 * processing a flying packet, but that is not a problem). Write guarded
935 * by team->lock.
936 */
937static void team_port_enable(struct team *team,
938 struct team_port *port)
939{
940 if (team_port_enabled(port))
941 return;
942 port->index = team->en_port_count++;
943 hlist_add_head_rcu(&port->hlist,
944 team_port_index_hash(team, port->index));
945 team_adjust_ops(team);
946 team_queue_override_port_add(team, port);
947 if (team->ops.port_enabled)
948 team->ops.port_enabled(team, port);
949 team_notify_peers(team);
950 team_mcast_rejoin(team);
951 team_lower_state_changed(port);
952}
953
954static void __reconstruct_port_hlist(struct team *team, int rm_index)
955{
956 int i;
957 struct team_port *port;
958
959 for (i = rm_index + 1; i < team->en_port_count; i++) {
960 port = team_get_port_by_index(team, i);
961 hlist_del_rcu(&port->hlist);
962 port->index--;
963 hlist_add_head_rcu(&port->hlist,
964 team_port_index_hash(team, port->index));
965 }
966}
967
968static void team_port_disable(struct team *team,
969 struct team_port *port)
970{
971 if (!team_port_enabled(port))
972 return;
973 if (team->ops.port_disabled)
974 team->ops.port_disabled(team, port);
975 hlist_del_rcu(&port->hlist);
976 __reconstruct_port_hlist(team, port->index);
977 port->index = -1;
978 team->en_port_count--;
979 team_queue_override_port_del(team, port);
980 team_adjust_ops(team);
981 team_notify_peers(team);
982 team_mcast_rejoin(team);
983 team_lower_state_changed(port);
984}
985
986#define TEAM_VLAN_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
987 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
988 NETIF_F_HIGHDMA | NETIF_F_LRO)
989
990#define TEAM_ENC_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
991 NETIF_F_RXCSUM | NETIF_F_ALL_TSO)
992
993static void ___team_compute_features(struct team *team)
994{
995 struct team_port *port;
996 u32 vlan_features = TEAM_VLAN_FEATURES & NETIF_F_ALL_FOR_ALL;
997 netdev_features_t enc_features = TEAM_ENC_FEATURES;
998 unsigned short max_hard_header_len = ETH_HLEN;
999 unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE |
1000 IFF_XMIT_DST_RELEASE_PERM;
1001
1002 list_for_each_entry(port, &team->port_list, list) {
1003 vlan_features = netdev_increment_features(vlan_features,
1004 port->dev->vlan_features,
1005 TEAM_VLAN_FEATURES);
1006 enc_features =
1007 netdev_increment_features(enc_features,
1008 port->dev->hw_enc_features,
1009 TEAM_ENC_FEATURES);
1010
1011
1012 dst_release_flag &= port->dev->priv_flags;
1013 if (port->dev->hard_header_len > max_hard_header_len)
1014 max_hard_header_len = port->dev->hard_header_len;
1015 }
1016
1017 team->dev->vlan_features = vlan_features;
1018 team->dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL;
1019 team->dev->hard_header_len = max_hard_header_len;
1020
1021 team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
1022 if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
1023 team->dev->priv_flags |= IFF_XMIT_DST_RELEASE;
1024}
1025
1026static void __team_compute_features(struct team *team)
1027{
1028 ___team_compute_features(team);
1029 netdev_change_features(team->dev);
1030}
1031
1032static void team_compute_features(struct team *team)
1033{
1034 mutex_lock(&team->lock);
1035 ___team_compute_features(team);
1036 mutex_unlock(&team->lock);
1037 netdev_change_features(team->dev);
1038}
1039
1040static int team_port_enter(struct team *team, struct team_port *port)
1041{
1042 int err = 0;
1043
1044 dev_hold(team->dev);
1045 if (team->ops.port_enter) {
1046 err = team->ops.port_enter(team, port);
1047 if (err) {
1048 netdev_err(team->dev, "Device %s failed to enter team mode\n",
1049 port->dev->name);
1050 goto err_port_enter;
1051 }
1052 }
1053
1054 return 0;
1055
1056err_port_enter:
1057 dev_put(team->dev);
1058
1059 return err;
1060}
1061
1062static void team_port_leave(struct team *team, struct team_port *port)
1063{
1064 if (team->ops.port_leave)
1065 team->ops.port_leave(team, port);
1066 dev_put(team->dev);
1067}
1068
1069#ifdef CONFIG_NET_POLL_CONTROLLER
1070static int team_port_enable_netpoll(struct team *team, struct team_port *port)
1071{
1072 struct netpoll *np;
1073 int err;
1074
1075 if (!team->dev->npinfo)
1076 return 0;
1077
1078 np = kzalloc(sizeof(*np), GFP_KERNEL);
1079 if (!np)
1080 return -ENOMEM;
1081
1082 err = __netpoll_setup(np, port->dev);
1083 if (err) {
1084 kfree(np);
1085 return err;
1086 }
1087 port->np = np;
1088 return err;
1089}
1090
1091static void team_port_disable_netpoll(struct team_port *port)
1092{
1093 struct netpoll *np = port->np;
1094
1095 if (!np)
1096 return;
1097 port->np = NULL;
1098
1099 /* Wait for transmitting packets to finish before freeing. */
1100 synchronize_rcu_bh();
1101 __netpoll_cleanup(np);
1102 kfree(np);
1103}
1104#else
1105static int team_port_enable_netpoll(struct team *team, struct team_port *port)
1106{
1107 return 0;
1108}
1109static void team_port_disable_netpoll(struct team_port *port)
1110{
1111}
1112#endif
1113
1114static int team_upper_dev_link(struct team *team, struct team_port *port)
1115{
1116 struct netdev_lag_upper_info lag_upper_info;
1117 int err;
1118
1119 lag_upper_info.tx_type = team->mode->lag_tx_type;
1120 err = netdev_master_upper_dev_link(port->dev, team->dev, NULL,
1121 &lag_upper_info);
1122 if (err)
1123 return err;
1124 port->dev->priv_flags |= IFF_TEAM_PORT;
1125 return 0;
1126}
1127
1128static void team_upper_dev_unlink(struct team *team, struct team_port *port)
1129{
1130 netdev_upper_dev_unlink(port->dev, team->dev);
1131 port->dev->priv_flags &= ~IFF_TEAM_PORT;
1132}
1133
1134static void __team_port_change_port_added(struct team_port *port, bool linkup);
1135static int team_dev_type_check_change(struct net_device *dev,
1136 struct net_device *port_dev);
1137
1138static int team_port_add(struct team *team, struct net_device *port_dev)
1139{
1140 struct net_device *dev = team->dev;
1141 struct team_port *port;
1142 char *portname = port_dev->name;
1143 int err;
1144
1145 if (port_dev->flags & IFF_LOOPBACK) {
1146 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1147 portname);
1148 return -EINVAL;
1149 }
1150
1151 if (team_port_exists(port_dev)) {
1152 netdev_err(dev, "Device %s is already a port "
1153 "of a team device\n", portname);
1154 return -EBUSY;
1155 }
1156
1157 if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1158 vlan_uses_dev(dev)) {
1159 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1160 portname);
1161 return -EPERM;
1162 }
1163
1164 err = team_dev_type_check_change(dev, port_dev);
1165 if (err)
1166 return err;
1167
1168 if (port_dev->flags & IFF_UP) {
1169 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1170 portname);
1171 return -EBUSY;
1172 }
1173
1174 port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1175 GFP_KERNEL);
1176 if (!port)
1177 return -ENOMEM;
1178
1179 port->dev = port_dev;
1180 port->team = team;
1181 INIT_LIST_HEAD(&port->qom_list);
1182
1183 port->orig.mtu = port_dev->mtu;
1184 err = dev_set_mtu(port_dev, dev->mtu);
1185 if (err) {
1186 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1187 goto err_set_mtu;
1188 }
1189
1190 memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1191
1192 err = team_port_enter(team, port);
1193 if (err) {
1194 netdev_err(dev, "Device %s failed to enter team mode\n",
1195 portname);
1196 goto err_port_enter;
1197 }
1198
1199 err = dev_open(port_dev);
1200 if (err) {
1201 netdev_dbg(dev, "Device %s opening failed\n",
1202 portname);
1203 goto err_dev_open;
1204 }
1205
1206 netif_addr_lock_bh(dev);
1207 dev_uc_sync_multiple(port_dev, dev);
1208 dev_mc_sync_multiple(port_dev, dev);
1209 netif_addr_unlock_bh(dev);
1210
1211 err = vlan_vids_add_by_dev(port_dev, dev);
1212 if (err) {
1213 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1214 portname);
1215 goto err_vids_add;
1216 }
1217
1218 err = team_port_enable_netpoll(team, port);
1219 if (err) {
1220 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1221 portname);
1222 goto err_enable_netpoll;
1223 }
1224
1225 if (!(dev->features & NETIF_F_LRO))
1226 dev_disable_lro(port_dev);
1227
1228 err = netdev_rx_handler_register(port_dev, team_handle_frame,
1229 port);
1230 if (err) {
1231 netdev_err(dev, "Device %s failed to register rx_handler\n",
1232 portname);
1233 goto err_handler_register;
1234 }
1235
1236 err = team_upper_dev_link(team, port);
1237 if (err) {
1238 netdev_err(dev, "Device %s failed to set upper link\n",
1239 portname);
1240 goto err_set_upper_link;
1241 }
1242
1243 err = __team_option_inst_add_port(team, port);
1244 if (err) {
1245 netdev_err(dev, "Device %s failed to add per-port options\n",
1246 portname);
1247 goto err_option_port_add;
1248 }
1249
1250 port->index = -1;
1251 list_add_tail_rcu(&port->list, &team->port_list);
1252 team_port_enable(team, port);
1253 __team_compute_features(team);
1254 __team_port_change_port_added(port, !!netif_carrier_ok(port_dev));
1255 __team_options_change_check(team);
1256
1257 netdev_info(dev, "Port device %s added\n", portname);
1258
1259 return 0;
1260
1261err_option_port_add:
1262 team_upper_dev_unlink(team, port);
1263
1264err_set_upper_link:
1265 netdev_rx_handler_unregister(port_dev);
1266
1267err_handler_register:
1268 team_port_disable_netpoll(port);
1269
1270err_enable_netpoll:
1271 vlan_vids_del_by_dev(port_dev, dev);
1272
1273err_vids_add:
1274 dev_uc_unsync(port_dev, dev);
1275 dev_mc_unsync(port_dev, dev);
1276 dev_close(port_dev);
1277
1278err_dev_open:
1279 team_port_leave(team, port);
1280 team_port_set_orig_dev_addr(port);
1281
1282err_port_enter:
1283 dev_set_mtu(port_dev, port->orig.mtu);
1284
1285err_set_mtu:
1286 kfree(port);
1287
1288 return err;
1289}
1290
1291static void __team_port_change_port_removed(struct team_port *port);
1292
1293static int team_port_del(struct team *team, struct net_device *port_dev)
1294{
1295 struct net_device *dev = team->dev;
1296 struct team_port *port;
1297 char *portname = port_dev->name;
1298
1299 port = team_port_get_rtnl(port_dev);
1300 if (!port || !team_port_find(team, port)) {
1301 netdev_err(dev, "Device %s does not act as a port of this team\n",
1302 portname);
1303 return -ENOENT;
1304 }
1305
1306 team_port_disable(team, port);
1307 list_del_rcu(&port->list);
1308 team_upper_dev_unlink(team, port);
1309 netdev_rx_handler_unregister(port_dev);
1310 team_port_disable_netpoll(port);
1311 vlan_vids_del_by_dev(port_dev, dev);
1312 dev_uc_unsync(port_dev, dev);
1313 dev_mc_unsync(port_dev, dev);
1314 dev_close(port_dev);
1315 team_port_leave(team, port);
1316
1317 __team_option_inst_mark_removed_port(team, port);
1318 __team_options_change_check(team);
1319 __team_option_inst_del_port(team, port);
1320 __team_port_change_port_removed(port);
1321
1322 team_port_set_orig_dev_addr(port);
1323 dev_set_mtu(port_dev, port->orig.mtu);
1324 kfree_rcu(port, rcu);
1325 netdev_info(dev, "Port device %s removed\n", portname);
1326 __team_compute_features(team);
1327
1328 return 0;
1329}
1330
1331
1332/*****************
1333 * Net device ops
1334 *****************/
1335
1336static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1337{
1338 ctx->data.str_val = team->mode->kind;
1339 return 0;
1340}
1341
1342static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1343{
1344 return team_change_mode(team, ctx->data.str_val);
1345}
1346
1347static int team_notify_peers_count_get(struct team *team,
1348 struct team_gsetter_ctx *ctx)
1349{
1350 ctx->data.u32_val = team->notify_peers.count;
1351 return 0;
1352}
1353
1354static int team_notify_peers_count_set(struct team *team,
1355 struct team_gsetter_ctx *ctx)
1356{
1357 team->notify_peers.count = ctx->data.u32_val;
1358 return 0;
1359}
1360
1361static int team_notify_peers_interval_get(struct team *team,
1362 struct team_gsetter_ctx *ctx)
1363{
1364 ctx->data.u32_val = team->notify_peers.interval;
1365 return 0;
1366}
1367
1368static int team_notify_peers_interval_set(struct team *team,
1369 struct team_gsetter_ctx *ctx)
1370{
1371 team->notify_peers.interval = ctx->data.u32_val;
1372 return 0;
1373}
1374
1375static int team_mcast_rejoin_count_get(struct team *team,
1376 struct team_gsetter_ctx *ctx)
1377{
1378 ctx->data.u32_val = team->mcast_rejoin.count;
1379 return 0;
1380}
1381
1382static int team_mcast_rejoin_count_set(struct team *team,
1383 struct team_gsetter_ctx *ctx)
1384{
1385 team->mcast_rejoin.count = ctx->data.u32_val;
1386 return 0;
1387}
1388
1389static int team_mcast_rejoin_interval_get(struct team *team,
1390 struct team_gsetter_ctx *ctx)
1391{
1392 ctx->data.u32_val = team->mcast_rejoin.interval;
1393 return 0;
1394}
1395
1396static int team_mcast_rejoin_interval_set(struct team *team,
1397 struct team_gsetter_ctx *ctx)
1398{
1399 team->mcast_rejoin.interval = ctx->data.u32_val;
1400 return 0;
1401}
1402
1403static int team_port_en_option_get(struct team *team,
1404 struct team_gsetter_ctx *ctx)
1405{
1406 struct team_port *port = ctx->info->port;
1407
1408 ctx->data.bool_val = team_port_enabled(port);
1409 return 0;
1410}
1411
1412static int team_port_en_option_set(struct team *team,
1413 struct team_gsetter_ctx *ctx)
1414{
1415 struct team_port *port = ctx->info->port;
1416
1417 if (ctx->data.bool_val)
1418 team_port_enable(team, port);
1419 else
1420 team_port_disable(team, port);
1421 return 0;
1422}
1423
1424static int team_user_linkup_option_get(struct team *team,
1425 struct team_gsetter_ctx *ctx)
1426{
1427 struct team_port *port = ctx->info->port;
1428
1429 ctx->data.bool_val = port->user.linkup;
1430 return 0;
1431}
1432
1433static void __team_carrier_check(struct team *team);
1434
1435static int team_user_linkup_option_set(struct team *team,
1436 struct team_gsetter_ctx *ctx)
1437{
1438 struct team_port *port = ctx->info->port;
1439
1440 port->user.linkup = ctx->data.bool_val;
1441 team_refresh_port_linkup(port);
1442 __team_carrier_check(port->team);
1443 return 0;
1444}
1445
1446static int team_user_linkup_en_option_get(struct team *team,
1447 struct team_gsetter_ctx *ctx)
1448{
1449 struct team_port *port = ctx->info->port;
1450
1451 ctx->data.bool_val = port->user.linkup_enabled;
1452 return 0;
1453}
1454
1455static int team_user_linkup_en_option_set(struct team *team,
1456 struct team_gsetter_ctx *ctx)
1457{
1458 struct team_port *port = ctx->info->port;
1459
1460 port->user.linkup_enabled = ctx->data.bool_val;
1461 team_refresh_port_linkup(port);
1462 __team_carrier_check(port->team);
1463 return 0;
1464}
1465
1466static int team_priority_option_get(struct team *team,
1467 struct team_gsetter_ctx *ctx)
1468{
1469 struct team_port *port = ctx->info->port;
1470
1471 ctx->data.s32_val = port->priority;
1472 return 0;
1473}
1474
1475static int team_priority_option_set(struct team *team,
1476 struct team_gsetter_ctx *ctx)
1477{
1478 struct team_port *port = ctx->info->port;
1479 s32 priority = ctx->data.s32_val;
1480
1481 if (port->priority == priority)
1482 return 0;
1483 port->priority = priority;
1484 team_queue_override_port_prio_changed(team, port);
1485 return 0;
1486}
1487
1488static int team_queue_id_option_get(struct team *team,
1489 struct team_gsetter_ctx *ctx)
1490{
1491 struct team_port *port = ctx->info->port;
1492
1493 ctx->data.u32_val = port->queue_id;
1494 return 0;
1495}
1496
1497static int team_queue_id_option_set(struct team *team,
1498 struct team_gsetter_ctx *ctx)
1499{
1500 struct team_port *port = ctx->info->port;
1501 u16 new_queue_id = ctx->data.u32_val;
1502
1503 if (port->queue_id == new_queue_id)
1504 return 0;
1505 if (new_queue_id >= team->dev->real_num_tx_queues)
1506 return -EINVAL;
1507 team_queue_override_port_change_queue_id(team, port, new_queue_id);
1508 return 0;
1509}
1510
1511static const struct team_option team_options[] = {
1512 {
1513 .name = "mode",
1514 .type = TEAM_OPTION_TYPE_STRING,
1515 .getter = team_mode_option_get,
1516 .setter = team_mode_option_set,
1517 },
1518 {
1519 .name = "notify_peers_count",
1520 .type = TEAM_OPTION_TYPE_U32,
1521 .getter = team_notify_peers_count_get,
1522 .setter = team_notify_peers_count_set,
1523 },
1524 {
1525 .name = "notify_peers_interval",
1526 .type = TEAM_OPTION_TYPE_U32,
1527 .getter = team_notify_peers_interval_get,
1528 .setter = team_notify_peers_interval_set,
1529 },
1530 {
1531 .name = "mcast_rejoin_count",
1532 .type = TEAM_OPTION_TYPE_U32,
1533 .getter = team_mcast_rejoin_count_get,
1534 .setter = team_mcast_rejoin_count_set,
1535 },
1536 {
1537 .name = "mcast_rejoin_interval",
1538 .type = TEAM_OPTION_TYPE_U32,
1539 .getter = team_mcast_rejoin_interval_get,
1540 .setter = team_mcast_rejoin_interval_set,
1541 },
1542 {
1543 .name = "enabled",
1544 .type = TEAM_OPTION_TYPE_BOOL,
1545 .per_port = true,
1546 .getter = team_port_en_option_get,
1547 .setter = team_port_en_option_set,
1548 },
1549 {
1550 .name = "user_linkup",
1551 .type = TEAM_OPTION_TYPE_BOOL,
1552 .per_port = true,
1553 .getter = team_user_linkup_option_get,
1554 .setter = team_user_linkup_option_set,
1555 },
1556 {
1557 .name = "user_linkup_enabled",
1558 .type = TEAM_OPTION_TYPE_BOOL,
1559 .per_port = true,
1560 .getter = team_user_linkup_en_option_get,
1561 .setter = team_user_linkup_en_option_set,
1562 },
1563 {
1564 .name = "priority",
1565 .type = TEAM_OPTION_TYPE_S32,
1566 .per_port = true,
1567 .getter = team_priority_option_get,
1568 .setter = team_priority_option_set,
1569 },
1570 {
1571 .name = "queue_id",
1572 .type = TEAM_OPTION_TYPE_U32,
1573 .per_port = true,
1574 .getter = team_queue_id_option_get,
1575 .setter = team_queue_id_option_set,
1576 },
1577};
1578
1579
1580static int team_init(struct net_device *dev)
1581{
1582 struct team *team = netdev_priv(dev);
1583 int i;
1584 int err;
1585
1586 team->dev = dev;
1587 mutex_init(&team->lock);
1588 team_set_no_mode(team);
1589
1590 team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1591 if (!team->pcpu_stats)
1592 return -ENOMEM;
1593
1594 for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1595 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1596 INIT_LIST_HEAD(&team->port_list);
1597 err = team_queue_override_init(team);
1598 if (err)
1599 goto err_team_queue_override_init;
1600
1601 team_adjust_ops(team);
1602
1603 INIT_LIST_HEAD(&team->option_list);
1604 INIT_LIST_HEAD(&team->option_inst_list);
1605
1606 team_notify_peers_init(team);
1607 team_mcast_rejoin_init(team);
1608
1609 err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1610 if (err)
1611 goto err_options_register;
1612 netif_carrier_off(dev);
1613
1614 netdev_lockdep_set_classes(dev);
1615
1616 return 0;
1617
1618err_options_register:
1619 team_mcast_rejoin_fini(team);
1620 team_notify_peers_fini(team);
1621 team_queue_override_fini(team);
1622err_team_queue_override_init:
1623 free_percpu(team->pcpu_stats);
1624
1625 return err;
1626}
1627
1628static void team_uninit(struct net_device *dev)
1629{
1630 struct team *team = netdev_priv(dev);
1631 struct team_port *port;
1632 struct team_port *tmp;
1633
1634 mutex_lock(&team->lock);
1635 list_for_each_entry_safe(port, tmp, &team->port_list, list)
1636 team_port_del(team, port->dev);
1637
1638 __team_change_mode(team, NULL); /* cleanup */
1639 __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1640 team_mcast_rejoin_fini(team);
1641 team_notify_peers_fini(team);
1642 team_queue_override_fini(team);
1643 mutex_unlock(&team->lock);
1644}
1645
1646static void team_destructor(struct net_device *dev)
1647{
1648 struct team *team = netdev_priv(dev);
1649
1650 free_percpu(team->pcpu_stats);
1651 free_netdev(dev);
1652}
1653
1654static int team_open(struct net_device *dev)
1655{
1656 return 0;
1657}
1658
1659static int team_close(struct net_device *dev)
1660{
1661 return 0;
1662}
1663
1664/*
1665 * note: already called with rcu_read_lock
1666 */
1667static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1668{
1669 struct team *team = netdev_priv(dev);
1670 bool tx_success;
1671 unsigned int len = skb->len;
1672
1673 tx_success = team_queue_override_transmit(team, skb);
1674 if (!tx_success)
1675 tx_success = team->ops.transmit(team, skb);
1676 if (tx_success) {
1677 struct team_pcpu_stats *pcpu_stats;
1678
1679 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1680 u64_stats_update_begin(&pcpu_stats->syncp);
1681 pcpu_stats->tx_packets++;
1682 pcpu_stats->tx_bytes += len;
1683 u64_stats_update_end(&pcpu_stats->syncp);
1684 } else {
1685 this_cpu_inc(team->pcpu_stats->tx_dropped);
1686 }
1687
1688 return NETDEV_TX_OK;
1689}
1690
1691static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1692 void *accel_priv, select_queue_fallback_t fallback)
1693{
1694 /*
1695 * This helper function exists to help dev_pick_tx get the correct
1696 * destination queue. Using a helper function skips a call to
1697 * skb_tx_hash and will put the skbs in the queue we expect on their
1698 * way down to the team driver.
1699 */
1700 u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1701
1702 /*
1703 * Save the original txq to restore before passing to the driver
1704 */
1705 qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1706
1707 if (unlikely(txq >= dev->real_num_tx_queues)) {
1708 do {
1709 txq -= dev->real_num_tx_queues;
1710 } while (txq >= dev->real_num_tx_queues);
1711 }
1712 return txq;
1713}
1714
1715static void team_change_rx_flags(struct net_device *dev, int change)
1716{
1717 struct team *team = netdev_priv(dev);
1718 struct team_port *port;
1719 int inc;
1720
1721 rcu_read_lock();
1722 list_for_each_entry_rcu(port, &team->port_list, list) {
1723 if (change & IFF_PROMISC) {
1724 inc = dev->flags & IFF_PROMISC ? 1 : -1;
1725 dev_set_promiscuity(port->dev, inc);
1726 }
1727 if (change & IFF_ALLMULTI) {
1728 inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1729 dev_set_allmulti(port->dev, inc);
1730 }
1731 }
1732 rcu_read_unlock();
1733}
1734
1735static void team_set_rx_mode(struct net_device *dev)
1736{
1737 struct team *team = netdev_priv(dev);
1738 struct team_port *port;
1739
1740 rcu_read_lock();
1741 list_for_each_entry_rcu(port, &team->port_list, list) {
1742 dev_uc_sync_multiple(port->dev, dev);
1743 dev_mc_sync_multiple(port->dev, dev);
1744 }
1745 rcu_read_unlock();
1746}
1747
1748static int team_set_mac_address(struct net_device *dev, void *p)
1749{
1750 struct sockaddr *addr = p;
1751 struct team *team = netdev_priv(dev);
1752 struct team_port *port;
1753
1754 if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1755 return -EADDRNOTAVAIL;
1756 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1757 mutex_lock(&team->lock);
1758 list_for_each_entry(port, &team->port_list, list)
1759 if (team->ops.port_change_dev_addr)
1760 team->ops.port_change_dev_addr(team, port);
1761 mutex_unlock(&team->lock);
1762 return 0;
1763}
1764
1765static int team_change_mtu(struct net_device *dev, int new_mtu)
1766{
1767 struct team *team = netdev_priv(dev);
1768 struct team_port *port;
1769 int err;
1770
1771 /*
1772 * Alhough this is reader, it's guarded by team lock. It's not possible
1773 * to traverse list in reverse under rcu_read_lock
1774 */
1775 mutex_lock(&team->lock);
1776 team->port_mtu_change_allowed = true;
1777 list_for_each_entry(port, &team->port_list, list) {
1778 err = dev_set_mtu(port->dev, new_mtu);
1779 if (err) {
1780 netdev_err(dev, "Device %s failed to change mtu",
1781 port->dev->name);
1782 goto unwind;
1783 }
1784 }
1785 team->port_mtu_change_allowed = false;
1786 mutex_unlock(&team->lock);
1787
1788 dev->mtu = new_mtu;
1789
1790 return 0;
1791
1792unwind:
1793 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1794 dev_set_mtu(port->dev, dev->mtu);
1795 team->port_mtu_change_allowed = false;
1796 mutex_unlock(&team->lock);
1797
1798 return err;
1799}
1800
1801static struct rtnl_link_stats64 *
1802team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1803{
1804 struct team *team = netdev_priv(dev);
1805 struct team_pcpu_stats *p;
1806 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1807 u32 rx_dropped = 0, tx_dropped = 0, rx_nohandler = 0;
1808 unsigned int start;
1809 int i;
1810
1811 for_each_possible_cpu(i) {
1812 p = per_cpu_ptr(team->pcpu_stats, i);
1813 do {
1814 start = u64_stats_fetch_begin_irq(&p->syncp);
1815 rx_packets = p->rx_packets;
1816 rx_bytes = p->rx_bytes;
1817 rx_multicast = p->rx_multicast;
1818 tx_packets = p->tx_packets;
1819 tx_bytes = p->tx_bytes;
1820 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
1821
1822 stats->rx_packets += rx_packets;
1823 stats->rx_bytes += rx_bytes;
1824 stats->multicast += rx_multicast;
1825 stats->tx_packets += tx_packets;
1826 stats->tx_bytes += tx_bytes;
1827 /*
1828 * rx_dropped, tx_dropped & rx_nohandler are u32,
1829 * updated without syncp protection.
1830 */
1831 rx_dropped += p->rx_dropped;
1832 tx_dropped += p->tx_dropped;
1833 rx_nohandler += p->rx_nohandler;
1834 }
1835 stats->rx_dropped = rx_dropped;
1836 stats->tx_dropped = tx_dropped;
1837 stats->rx_nohandler = rx_nohandler;
1838 return stats;
1839}
1840
1841static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1842{
1843 struct team *team = netdev_priv(dev);
1844 struct team_port *port;
1845 int err;
1846
1847 /*
1848 * Alhough this is reader, it's guarded by team lock. It's not possible
1849 * to traverse list in reverse under rcu_read_lock
1850 */
1851 mutex_lock(&team->lock);
1852 list_for_each_entry(port, &team->port_list, list) {
1853 err = vlan_vid_add(port->dev, proto, vid);
1854 if (err)
1855 goto unwind;
1856 }
1857 mutex_unlock(&team->lock);
1858
1859 return 0;
1860
1861unwind:
1862 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1863 vlan_vid_del(port->dev, proto, vid);
1864 mutex_unlock(&team->lock);
1865
1866 return err;
1867}
1868
1869static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1870{
1871 struct team *team = netdev_priv(dev);
1872 struct team_port *port;
1873
1874 mutex_lock(&team->lock);
1875 list_for_each_entry(port, &team->port_list, list)
1876 vlan_vid_del(port->dev, proto, vid);
1877 mutex_unlock(&team->lock);
1878
1879 return 0;
1880}
1881
1882#ifdef CONFIG_NET_POLL_CONTROLLER
1883static void team_poll_controller(struct net_device *dev)
1884{
1885}
1886
1887static void __team_netpoll_cleanup(struct team *team)
1888{
1889 struct team_port *port;
1890
1891 list_for_each_entry(port, &team->port_list, list)
1892 team_port_disable_netpoll(port);
1893}
1894
1895static void team_netpoll_cleanup(struct net_device *dev)
1896{
1897 struct team *team = netdev_priv(dev);
1898
1899 mutex_lock(&team->lock);
1900 __team_netpoll_cleanup(team);
1901 mutex_unlock(&team->lock);
1902}
1903
1904static int team_netpoll_setup(struct net_device *dev,
1905 struct netpoll_info *npifo)
1906{
1907 struct team *team = netdev_priv(dev);
1908 struct team_port *port;
1909 int err = 0;
1910
1911 mutex_lock(&team->lock);
1912 list_for_each_entry(port, &team->port_list, list) {
1913 err = team_port_enable_netpoll(team, port);
1914 if (err) {
1915 __team_netpoll_cleanup(team);
1916 break;
1917 }
1918 }
1919 mutex_unlock(&team->lock);
1920 return err;
1921}
1922#endif
1923
1924static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
1925{
1926 struct team *team = netdev_priv(dev);
1927 int err;
1928
1929 mutex_lock(&team->lock);
1930 err = team_port_add(team, port_dev);
1931 mutex_unlock(&team->lock);
1932 return err;
1933}
1934
1935static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1936{
1937 struct team *team = netdev_priv(dev);
1938 int err;
1939
1940 mutex_lock(&team->lock);
1941 err = team_port_del(team, port_dev);
1942 mutex_unlock(&team->lock);
1943 return err;
1944}
1945
1946static netdev_features_t team_fix_features(struct net_device *dev,
1947 netdev_features_t features)
1948{
1949 struct team_port *port;
1950 struct team *team = netdev_priv(dev);
1951 netdev_features_t mask;
1952
1953 mask = features;
1954 features &= ~NETIF_F_ONE_FOR_ALL;
1955 features |= NETIF_F_ALL_FOR_ALL;
1956
1957 rcu_read_lock();
1958 list_for_each_entry_rcu(port, &team->port_list, list) {
1959 features = netdev_increment_features(features,
1960 port->dev->features,
1961 mask);
1962 }
1963 rcu_read_unlock();
1964
1965 features = netdev_add_tso_features(features, mask);
1966
1967 return features;
1968}
1969
1970static int team_change_carrier(struct net_device *dev, bool new_carrier)
1971{
1972 struct team *team = netdev_priv(dev);
1973
1974 team->user_carrier_enabled = true;
1975
1976 if (new_carrier)
1977 netif_carrier_on(dev);
1978 else
1979 netif_carrier_off(dev);
1980 return 0;
1981}
1982
1983static const struct net_device_ops team_netdev_ops = {
1984 .ndo_init = team_init,
1985 .ndo_uninit = team_uninit,
1986 .ndo_open = team_open,
1987 .ndo_stop = team_close,
1988 .ndo_start_xmit = team_xmit,
1989 .ndo_select_queue = team_select_queue,
1990 .ndo_change_rx_flags = team_change_rx_flags,
1991 .ndo_set_rx_mode = team_set_rx_mode,
1992 .ndo_set_mac_address = team_set_mac_address,
1993 .ndo_change_mtu = team_change_mtu,
1994 .ndo_get_stats64 = team_get_stats64,
1995 .ndo_vlan_rx_add_vid = team_vlan_rx_add_vid,
1996 .ndo_vlan_rx_kill_vid = team_vlan_rx_kill_vid,
1997#ifdef CONFIG_NET_POLL_CONTROLLER
1998 .ndo_poll_controller = team_poll_controller,
1999 .ndo_netpoll_setup = team_netpoll_setup,
2000 .ndo_netpoll_cleanup = team_netpoll_cleanup,
2001#endif
2002 .ndo_add_slave = team_add_slave,
2003 .ndo_del_slave = team_del_slave,
2004 .ndo_fix_features = team_fix_features,
2005 .ndo_neigh_construct = netdev_default_l2upper_neigh_construct,
2006 .ndo_neigh_destroy = netdev_default_l2upper_neigh_destroy,
2007 .ndo_change_carrier = team_change_carrier,
2008 .ndo_bridge_setlink = switchdev_port_bridge_setlink,
2009 .ndo_bridge_getlink = switchdev_port_bridge_getlink,
2010 .ndo_bridge_dellink = switchdev_port_bridge_dellink,
2011 .ndo_fdb_add = switchdev_port_fdb_add,
2012 .ndo_fdb_del = switchdev_port_fdb_del,
2013 .ndo_fdb_dump = switchdev_port_fdb_dump,
2014 .ndo_features_check = passthru_features_check,
2015};
2016
2017/***********************
2018 * ethtool interface
2019 ***********************/
2020
2021static void team_ethtool_get_drvinfo(struct net_device *dev,
2022 struct ethtool_drvinfo *drvinfo)
2023{
2024 strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
2025 strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2026}
2027
2028static const struct ethtool_ops team_ethtool_ops = {
2029 .get_drvinfo = team_ethtool_get_drvinfo,
2030 .get_link = ethtool_op_get_link,
2031};
2032
2033/***********************
2034 * rt netlink interface
2035 ***********************/
2036
2037static void team_setup_by_port(struct net_device *dev,
2038 struct net_device *port_dev)
2039{
2040 dev->header_ops = port_dev->header_ops;
2041 dev->type = port_dev->type;
2042 dev->hard_header_len = port_dev->hard_header_len;
2043 dev->addr_len = port_dev->addr_len;
2044 dev->mtu = port_dev->mtu;
2045 memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2046 eth_hw_addr_inherit(dev, port_dev);
2047}
2048
2049static int team_dev_type_check_change(struct net_device *dev,
2050 struct net_device *port_dev)
2051{
2052 struct team *team = netdev_priv(dev);
2053 char *portname = port_dev->name;
2054 int err;
2055
2056 if (dev->type == port_dev->type)
2057 return 0;
2058 if (!list_empty(&team->port_list)) {
2059 netdev_err(dev, "Device %s is of different type\n", portname);
2060 return -EBUSY;
2061 }
2062 err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2063 err = notifier_to_errno(err);
2064 if (err) {
2065 netdev_err(dev, "Refused to change device type\n");
2066 return err;
2067 }
2068 dev_uc_flush(dev);
2069 dev_mc_flush(dev);
2070 team_setup_by_port(dev, port_dev);
2071 call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2072 return 0;
2073}
2074
2075static void team_setup(struct net_device *dev)
2076{
2077 ether_setup(dev);
2078 dev->max_mtu = ETH_MAX_MTU;
2079
2080 dev->netdev_ops = &team_netdev_ops;
2081 dev->ethtool_ops = &team_ethtool_ops;
2082 dev->destructor = team_destructor;
2083 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2084 dev->priv_flags |= IFF_NO_QUEUE;
2085 dev->priv_flags |= IFF_TEAM;
2086
2087 /*
2088 * Indicate we support unicast address filtering. That way core won't
2089 * bring us to promisc mode in case a unicast addr is added.
2090 * Let this up to underlay drivers.
2091 */
2092 dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2093
2094 dev->features |= NETIF_F_LLTX;
2095 dev->features |= NETIF_F_GRO;
2096
2097 /* Don't allow team devices to change network namespaces. */
2098 dev->features |= NETIF_F_NETNS_LOCAL;
2099
2100 dev->hw_features = TEAM_VLAN_FEATURES |
2101 NETIF_F_HW_VLAN_CTAG_TX |
2102 NETIF_F_HW_VLAN_CTAG_RX |
2103 NETIF_F_HW_VLAN_CTAG_FILTER;
2104
2105 dev->hw_features |= NETIF_F_GSO_ENCAP_ALL;
2106 dev->features |= dev->hw_features;
2107}
2108
2109static int team_newlink(struct net *src_net, struct net_device *dev,
2110 struct nlattr *tb[], struct nlattr *data[])
2111{
2112 if (tb[IFLA_ADDRESS] == NULL)
2113 eth_hw_addr_random(dev);
2114
2115 return register_netdevice(dev);
2116}
2117
2118static int team_validate(struct nlattr *tb[], struct nlattr *data[])
2119{
2120 if (tb[IFLA_ADDRESS]) {
2121 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2122 return -EINVAL;
2123 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2124 return -EADDRNOTAVAIL;
2125 }
2126 return 0;
2127}
2128
2129static unsigned int team_get_num_tx_queues(void)
2130{
2131 return TEAM_DEFAULT_NUM_TX_QUEUES;
2132}
2133
2134static unsigned int team_get_num_rx_queues(void)
2135{
2136 return TEAM_DEFAULT_NUM_RX_QUEUES;
2137}
2138
2139static struct rtnl_link_ops team_link_ops __read_mostly = {
2140 .kind = DRV_NAME,
2141 .priv_size = sizeof(struct team),
2142 .setup = team_setup,
2143 .newlink = team_newlink,
2144 .validate = team_validate,
2145 .get_num_tx_queues = team_get_num_tx_queues,
2146 .get_num_rx_queues = team_get_num_rx_queues,
2147};
2148
2149
2150/***********************************
2151 * Generic netlink custom interface
2152 ***********************************/
2153
2154static struct genl_family team_nl_family;
2155
2156static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2157 [TEAM_ATTR_UNSPEC] = { .type = NLA_UNSPEC, },
2158 [TEAM_ATTR_TEAM_IFINDEX] = { .type = NLA_U32 },
2159 [TEAM_ATTR_LIST_OPTION] = { .type = NLA_NESTED },
2160 [TEAM_ATTR_LIST_PORT] = { .type = NLA_NESTED },
2161};
2162
2163static const struct nla_policy
2164team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2165 [TEAM_ATTR_OPTION_UNSPEC] = { .type = NLA_UNSPEC, },
2166 [TEAM_ATTR_OPTION_NAME] = {
2167 .type = NLA_STRING,
2168 .len = TEAM_STRING_MAX_LEN,
2169 },
2170 [TEAM_ATTR_OPTION_CHANGED] = { .type = NLA_FLAG },
2171 [TEAM_ATTR_OPTION_TYPE] = { .type = NLA_U8 },
2172 [TEAM_ATTR_OPTION_DATA] = { .type = NLA_BINARY },
2173};
2174
2175static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2176{
2177 struct sk_buff *msg;
2178 void *hdr;
2179 int err;
2180
2181 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2182 if (!msg)
2183 return -ENOMEM;
2184
2185 hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2186 &team_nl_family, 0, TEAM_CMD_NOOP);
2187 if (!hdr) {
2188 err = -EMSGSIZE;
2189 goto err_msg_put;
2190 }
2191
2192 genlmsg_end(msg, hdr);
2193
2194 return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2195
2196err_msg_put:
2197 nlmsg_free(msg);
2198
2199 return err;
2200}
2201
2202/*
2203 * Netlink cmd functions should be locked by following two functions.
2204 * Since dev gets held here, that ensures dev won't disappear in between.
2205 */
2206static struct team *team_nl_team_get(struct genl_info *info)
2207{
2208 struct net *net = genl_info_net(info);
2209 int ifindex;
2210 struct net_device *dev;
2211 struct team *team;
2212
2213 if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2214 return NULL;
2215
2216 ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2217 dev = dev_get_by_index(net, ifindex);
2218 if (!dev || dev->netdev_ops != &team_netdev_ops) {
2219 if (dev)
2220 dev_put(dev);
2221 return NULL;
2222 }
2223
2224 team = netdev_priv(dev);
2225 mutex_lock(&team->lock);
2226 return team;
2227}
2228
2229static void team_nl_team_put(struct team *team)
2230{
2231 mutex_unlock(&team->lock);
2232 dev_put(team->dev);
2233}
2234
2235typedef int team_nl_send_func_t(struct sk_buff *skb,
2236 struct team *team, u32 portid);
2237
2238static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2239{
2240 return genlmsg_unicast(dev_net(team->dev), skb, portid);
2241}
2242
2243static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2244 struct team_option_inst *opt_inst)
2245{
2246 struct nlattr *option_item;
2247 struct team_option *option = opt_inst->option;
2248 struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2249 struct team_gsetter_ctx ctx;
2250 int err;
2251
2252 ctx.info = opt_inst_info;
2253 err = team_option_get(team, opt_inst, &ctx);
2254 if (err)
2255 return err;
2256
2257 option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
2258 if (!option_item)
2259 return -EMSGSIZE;
2260
2261 if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2262 goto nest_cancel;
2263 if (opt_inst_info->port &&
2264 nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2265 opt_inst_info->port->dev->ifindex))
2266 goto nest_cancel;
2267 if (opt_inst->option->array_size &&
2268 nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2269 opt_inst_info->array_index))
2270 goto nest_cancel;
2271
2272 switch (option->type) {
2273 case TEAM_OPTION_TYPE_U32:
2274 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2275 goto nest_cancel;
2276 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2277 goto nest_cancel;
2278 break;
2279 case TEAM_OPTION_TYPE_STRING:
2280 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2281 goto nest_cancel;
2282 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2283 ctx.data.str_val))
2284 goto nest_cancel;
2285 break;
2286 case TEAM_OPTION_TYPE_BINARY:
2287 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2288 goto nest_cancel;
2289 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2290 ctx.data.bin_val.ptr))
2291 goto nest_cancel;
2292 break;
2293 case TEAM_OPTION_TYPE_BOOL:
2294 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2295 goto nest_cancel;
2296 if (ctx.data.bool_val &&
2297 nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2298 goto nest_cancel;
2299 break;
2300 case TEAM_OPTION_TYPE_S32:
2301 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2302 goto nest_cancel;
2303 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2304 goto nest_cancel;
2305 break;
2306 default:
2307 BUG();
2308 }
2309 if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2310 goto nest_cancel;
2311 if (opt_inst->changed) {
2312 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2313 goto nest_cancel;
2314 opt_inst->changed = false;
2315 }
2316 nla_nest_end(skb, option_item);
2317 return 0;
2318
2319nest_cancel:
2320 nla_nest_cancel(skb, option_item);
2321 return -EMSGSIZE;
2322}
2323
2324static int __send_and_alloc_skb(struct sk_buff **pskb,
2325 struct team *team, u32 portid,
2326 team_nl_send_func_t *send_func)
2327{
2328 int err;
2329
2330 if (*pskb) {
2331 err = send_func(*pskb, team, portid);
2332 if (err)
2333 return err;
2334 }
2335 *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2336 if (!*pskb)
2337 return -ENOMEM;
2338 return 0;
2339}
2340
2341static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2342 int flags, team_nl_send_func_t *send_func,
2343 struct list_head *sel_opt_inst_list)
2344{
2345 struct nlattr *option_list;
2346 struct nlmsghdr *nlh;
2347 void *hdr;
2348 struct team_option_inst *opt_inst;
2349 int err;
2350 struct sk_buff *skb = NULL;
2351 bool incomplete;
2352 int i;
2353
2354 opt_inst = list_first_entry(sel_opt_inst_list,
2355 struct team_option_inst, tmp_list);
2356
2357start_again:
2358 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2359 if (err)
2360 return err;
2361
2362 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2363 TEAM_CMD_OPTIONS_GET);
2364 if (!hdr)
2365 return -EMSGSIZE;
2366
2367 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2368 goto nla_put_failure;
2369 option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2370 if (!option_list)
2371 goto nla_put_failure;
2372
2373 i = 0;
2374 incomplete = false;
2375 list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2376 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2377 if (err) {
2378 if (err == -EMSGSIZE) {
2379 if (!i)
2380 goto errout;
2381 incomplete = true;
2382 break;
2383 }
2384 goto errout;
2385 }
2386 i++;
2387 }
2388
2389 nla_nest_end(skb, option_list);
2390 genlmsg_end(skb, hdr);
2391 if (incomplete)
2392 goto start_again;
2393
2394send_done:
2395 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2396 if (!nlh) {
2397 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2398 if (err)
2399 goto errout;
2400 goto send_done;
2401 }
2402
2403 return send_func(skb, team, portid);
2404
2405nla_put_failure:
2406 err = -EMSGSIZE;
2407errout:
2408 genlmsg_cancel(skb, hdr);
2409 nlmsg_free(skb);
2410 return err;
2411}
2412
2413static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2414{
2415 struct team *team;
2416 struct team_option_inst *opt_inst;
2417 int err;
2418 LIST_HEAD(sel_opt_inst_list);
2419
2420 team = team_nl_team_get(info);
2421 if (!team)
2422 return -EINVAL;
2423
2424 list_for_each_entry(opt_inst, &team->option_inst_list, list)
2425 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2426 err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2427 NLM_F_ACK, team_nl_send_unicast,
2428 &sel_opt_inst_list);
2429
2430 team_nl_team_put(team);
2431
2432 return err;
2433}
2434
2435static int team_nl_send_event_options_get(struct team *team,
2436 struct list_head *sel_opt_inst_list);
2437
2438static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2439{
2440 struct team *team;
2441 int err = 0;
2442 int i;
2443 struct nlattr *nl_option;
2444 LIST_HEAD(opt_inst_list);
2445
2446 rtnl_lock();
2447
2448 team = team_nl_team_get(info);
2449 if (!team) {
2450 err = -EINVAL;
2451 goto rtnl_unlock;
2452 }
2453
2454 err = -EINVAL;
2455 if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2456 err = -EINVAL;
2457 goto team_put;
2458 }
2459
2460 nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2461 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2462 struct nlattr *attr;
2463 struct nlattr *attr_data;
2464 enum team_option_type opt_type;
2465 int opt_port_ifindex = 0; /* != 0 for per-port options */
2466 u32 opt_array_index = 0;
2467 bool opt_is_array = false;
2468 struct team_option_inst *opt_inst;
2469 char *opt_name;
2470 bool opt_found = false;
2471
2472 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2473 err = -EINVAL;
2474 goto team_put;
2475 }
2476 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2477 nl_option, team_nl_option_policy);
2478 if (err)
2479 goto team_put;
2480 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2481 !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2482 err = -EINVAL;
2483 goto team_put;
2484 }
2485 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2486 case NLA_U32:
2487 opt_type = TEAM_OPTION_TYPE_U32;
2488 break;
2489 case NLA_STRING:
2490 opt_type = TEAM_OPTION_TYPE_STRING;
2491 break;
2492 case NLA_BINARY:
2493 opt_type = TEAM_OPTION_TYPE_BINARY;
2494 break;
2495 case NLA_FLAG:
2496 opt_type = TEAM_OPTION_TYPE_BOOL;
2497 break;
2498 case NLA_S32:
2499 opt_type = TEAM_OPTION_TYPE_S32;
2500 break;
2501 default:
2502 goto team_put;
2503 }
2504
2505 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2506 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2507 err = -EINVAL;
2508 goto team_put;
2509 }
2510
2511 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2512 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2513 if (attr)
2514 opt_port_ifindex = nla_get_u32(attr);
2515
2516 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2517 if (attr) {
2518 opt_is_array = true;
2519 opt_array_index = nla_get_u32(attr);
2520 }
2521
2522 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2523 struct team_option *option = opt_inst->option;
2524 struct team_gsetter_ctx ctx;
2525 struct team_option_inst_info *opt_inst_info;
2526 int tmp_ifindex;
2527
2528 opt_inst_info = &opt_inst->info;
2529 tmp_ifindex = opt_inst_info->port ?
2530 opt_inst_info->port->dev->ifindex : 0;
2531 if (option->type != opt_type ||
2532 strcmp(option->name, opt_name) ||
2533 tmp_ifindex != opt_port_ifindex ||
2534 (option->array_size && !opt_is_array) ||
2535 opt_inst_info->array_index != opt_array_index)
2536 continue;
2537 opt_found = true;
2538 ctx.info = opt_inst_info;
2539 switch (opt_type) {
2540 case TEAM_OPTION_TYPE_U32:
2541 ctx.data.u32_val = nla_get_u32(attr_data);
2542 break;
2543 case TEAM_OPTION_TYPE_STRING:
2544 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2545 err = -EINVAL;
2546 goto team_put;
2547 }
2548 ctx.data.str_val = nla_data(attr_data);
2549 break;
2550 case TEAM_OPTION_TYPE_BINARY:
2551 ctx.data.bin_val.len = nla_len(attr_data);
2552 ctx.data.bin_val.ptr = nla_data(attr_data);
2553 break;
2554 case TEAM_OPTION_TYPE_BOOL:
2555 ctx.data.bool_val = attr_data ? true : false;
2556 break;
2557 case TEAM_OPTION_TYPE_S32:
2558 ctx.data.s32_val = nla_get_s32(attr_data);
2559 break;
2560 default:
2561 BUG();
2562 }
2563 err = team_option_set(team, opt_inst, &ctx);
2564 if (err)
2565 goto team_put;
2566 opt_inst->changed = true;
2567 list_add(&opt_inst->tmp_list, &opt_inst_list);
2568 }
2569 if (!opt_found) {
2570 err = -ENOENT;
2571 goto team_put;
2572 }
2573 }
2574
2575 err = team_nl_send_event_options_get(team, &opt_inst_list);
2576
2577team_put:
2578 team_nl_team_put(team);
2579rtnl_unlock:
2580 rtnl_unlock();
2581 return err;
2582}
2583
2584static int team_nl_fill_one_port_get(struct sk_buff *skb,
2585 struct team_port *port)
2586{
2587 struct nlattr *port_item;
2588
2589 port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2590 if (!port_item)
2591 goto nest_cancel;
2592 if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2593 goto nest_cancel;
2594 if (port->changed) {
2595 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2596 goto nest_cancel;
2597 port->changed = false;
2598 }
2599 if ((port->removed &&
2600 nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2601 (port->state.linkup &&
2602 nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2603 nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2604 nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2605 goto nest_cancel;
2606 nla_nest_end(skb, port_item);
2607 return 0;
2608
2609nest_cancel:
2610 nla_nest_cancel(skb, port_item);
2611 return -EMSGSIZE;
2612}
2613
2614static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2615 int flags, team_nl_send_func_t *send_func,
2616 struct team_port *one_port)
2617{
2618 struct nlattr *port_list;
2619 struct nlmsghdr *nlh;
2620 void *hdr;
2621 struct team_port *port;
2622 int err;
2623 struct sk_buff *skb = NULL;
2624 bool incomplete;
2625 int i;
2626
2627 port = list_first_entry_or_null(&team->port_list,
2628 struct team_port, list);
2629
2630start_again:
2631 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2632 if (err)
2633 return err;
2634
2635 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2636 TEAM_CMD_PORT_LIST_GET);
2637 if (!hdr)
2638 return -EMSGSIZE;
2639
2640 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2641 goto nla_put_failure;
2642 port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2643 if (!port_list)
2644 goto nla_put_failure;
2645
2646 i = 0;
2647 incomplete = false;
2648
2649 /* If one port is selected, called wants to send port list containing
2650 * only this port. Otherwise go through all listed ports and send all
2651 */
2652 if (one_port) {
2653 err = team_nl_fill_one_port_get(skb, one_port);
2654 if (err)
2655 goto errout;
2656 } else if (port) {
2657 list_for_each_entry_from(port, &team->port_list, list) {
2658 err = team_nl_fill_one_port_get(skb, port);
2659 if (err) {
2660 if (err == -EMSGSIZE) {
2661 if (!i)
2662 goto errout;
2663 incomplete = true;
2664 break;
2665 }
2666 goto errout;
2667 }
2668 i++;
2669 }
2670 }
2671
2672 nla_nest_end(skb, port_list);
2673 genlmsg_end(skb, hdr);
2674 if (incomplete)
2675 goto start_again;
2676
2677send_done:
2678 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2679 if (!nlh) {
2680 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2681 if (err)
2682 goto errout;
2683 goto send_done;
2684 }
2685
2686 return send_func(skb, team, portid);
2687
2688nla_put_failure:
2689 err = -EMSGSIZE;
2690errout:
2691 genlmsg_cancel(skb, hdr);
2692 nlmsg_free(skb);
2693 return err;
2694}
2695
2696static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2697 struct genl_info *info)
2698{
2699 struct team *team;
2700 int err;
2701
2702 team = team_nl_team_get(info);
2703 if (!team)
2704 return -EINVAL;
2705
2706 err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2707 NLM_F_ACK, team_nl_send_unicast, NULL);
2708
2709 team_nl_team_put(team);
2710
2711 return err;
2712}
2713
2714static const struct genl_ops team_nl_ops[] = {
2715 {
2716 .cmd = TEAM_CMD_NOOP,
2717 .doit = team_nl_cmd_noop,
2718 .policy = team_nl_policy,
2719 },
2720 {
2721 .cmd = TEAM_CMD_OPTIONS_SET,
2722 .doit = team_nl_cmd_options_set,
2723 .policy = team_nl_policy,
2724 .flags = GENL_ADMIN_PERM,
2725 },
2726 {
2727 .cmd = TEAM_CMD_OPTIONS_GET,
2728 .doit = team_nl_cmd_options_get,
2729 .policy = team_nl_policy,
2730 .flags = GENL_ADMIN_PERM,
2731 },
2732 {
2733 .cmd = TEAM_CMD_PORT_LIST_GET,
2734 .doit = team_nl_cmd_port_list_get,
2735 .policy = team_nl_policy,
2736 .flags = GENL_ADMIN_PERM,
2737 },
2738};
2739
2740static const struct genl_multicast_group team_nl_mcgrps[] = {
2741 { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2742};
2743
2744static struct genl_family team_nl_family __ro_after_init = {
2745 .name = TEAM_GENL_NAME,
2746 .version = TEAM_GENL_VERSION,
2747 .maxattr = TEAM_ATTR_MAX,
2748 .netnsok = true,
2749 .module = THIS_MODULE,
2750 .ops = team_nl_ops,
2751 .n_ops = ARRAY_SIZE(team_nl_ops),
2752 .mcgrps = team_nl_mcgrps,
2753 .n_mcgrps = ARRAY_SIZE(team_nl_mcgrps),
2754};
2755
2756static int team_nl_send_multicast(struct sk_buff *skb,
2757 struct team *team, u32 portid)
2758{
2759 return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2760 skb, 0, 0, GFP_KERNEL);
2761}
2762
2763static int team_nl_send_event_options_get(struct team *team,
2764 struct list_head *sel_opt_inst_list)
2765{
2766 return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2767 sel_opt_inst_list);
2768}
2769
2770static int team_nl_send_event_port_get(struct team *team,
2771 struct team_port *port)
2772{
2773 return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2774 port);
2775}
2776
2777static int __init team_nl_init(void)
2778{
2779 return genl_register_family(&team_nl_family);
2780}
2781
2782static void team_nl_fini(void)
2783{
2784 genl_unregister_family(&team_nl_family);
2785}
2786
2787
2788/******************
2789 * Change checkers
2790 ******************/
2791
2792static void __team_options_change_check(struct team *team)
2793{
2794 int err;
2795 struct team_option_inst *opt_inst;
2796 LIST_HEAD(sel_opt_inst_list);
2797
2798 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2799 if (opt_inst->changed)
2800 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2801 }
2802 err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2803 if (err && err != -ESRCH)
2804 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2805 err);
2806}
2807
2808/* rtnl lock is held */
2809
2810static void __team_port_change_send(struct team_port *port, bool linkup)
2811{
2812 int err;
2813
2814 port->changed = true;
2815 port->state.linkup = linkup;
2816 team_refresh_port_linkup(port);
2817 if (linkup) {
2818 struct ethtool_link_ksettings ecmd;
2819
2820 err = __ethtool_get_link_ksettings(port->dev, &ecmd);
2821 if (!err) {
2822 port->state.speed = ecmd.base.speed;
2823 port->state.duplex = ecmd.base.duplex;
2824 goto send_event;
2825 }
2826 }
2827 port->state.speed = 0;
2828 port->state.duplex = 0;
2829
2830send_event:
2831 err = team_nl_send_event_port_get(port->team, port);
2832 if (err && err != -ESRCH)
2833 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2834 port->dev->name, err);
2835
2836}
2837
2838static void __team_carrier_check(struct team *team)
2839{
2840 struct team_port *port;
2841 bool team_linkup;
2842
2843 if (team->user_carrier_enabled)
2844 return;
2845
2846 team_linkup = false;
2847 list_for_each_entry(port, &team->port_list, list) {
2848 if (port->linkup) {
2849 team_linkup = true;
2850 break;
2851 }
2852 }
2853
2854 if (team_linkup)
2855 netif_carrier_on(team->dev);
2856 else
2857 netif_carrier_off(team->dev);
2858}
2859
2860static void __team_port_change_check(struct team_port *port, bool linkup)
2861{
2862 if (port->state.linkup != linkup)
2863 __team_port_change_send(port, linkup);
2864 __team_carrier_check(port->team);
2865}
2866
2867static void __team_port_change_port_added(struct team_port *port, bool linkup)
2868{
2869 __team_port_change_send(port, linkup);
2870 __team_carrier_check(port->team);
2871}
2872
2873static void __team_port_change_port_removed(struct team_port *port)
2874{
2875 port->removed = true;
2876 __team_port_change_send(port, false);
2877 __team_carrier_check(port->team);
2878}
2879
2880static void team_port_change_check(struct team_port *port, bool linkup)
2881{
2882 struct team *team = port->team;
2883
2884 mutex_lock(&team->lock);
2885 __team_port_change_check(port, linkup);
2886 mutex_unlock(&team->lock);
2887}
2888
2889
2890/************************************
2891 * Net device notifier event handler
2892 ************************************/
2893
2894static int team_device_event(struct notifier_block *unused,
2895 unsigned long event, void *ptr)
2896{
2897 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2898 struct team_port *port;
2899
2900 port = team_port_get_rtnl(dev);
2901 if (!port)
2902 return NOTIFY_DONE;
2903
2904 switch (event) {
2905 case NETDEV_UP:
2906 if (netif_carrier_ok(dev))
2907 team_port_change_check(port, true);
2908 break;
2909 case NETDEV_DOWN:
2910 team_port_change_check(port, false);
2911 break;
2912 case NETDEV_CHANGE:
2913 if (netif_running(port->dev))
2914 team_port_change_check(port,
2915 !!netif_carrier_ok(port->dev));
2916 break;
2917 case NETDEV_UNREGISTER:
2918 team_del_slave(port->team->dev, dev);
2919 break;
2920 case NETDEV_FEAT_CHANGE:
2921 team_compute_features(port->team);
2922 break;
2923 case NETDEV_PRECHANGEMTU:
2924 /* Forbid to change mtu of underlaying device */
2925 if (!port->team->port_mtu_change_allowed)
2926 return NOTIFY_BAD;
2927 break;
2928 case NETDEV_PRE_TYPE_CHANGE:
2929 /* Forbid to change type of underlaying device */
2930 return NOTIFY_BAD;
2931 case NETDEV_RESEND_IGMP:
2932 /* Propagate to master device */
2933 call_netdevice_notifiers(event, port->team->dev);
2934 break;
2935 }
2936 return NOTIFY_DONE;
2937}
2938
2939static struct notifier_block team_notifier_block __read_mostly = {
2940 .notifier_call = team_device_event,
2941};
2942
2943
2944/***********************
2945 * Module init and exit
2946 ***********************/
2947
2948static int __init team_module_init(void)
2949{
2950 int err;
2951
2952 register_netdevice_notifier(&team_notifier_block);
2953
2954 err = rtnl_link_register(&team_link_ops);
2955 if (err)
2956 goto err_rtnl_reg;
2957
2958 err = team_nl_init();
2959 if (err)
2960 goto err_nl_init;
2961
2962 return 0;
2963
2964err_nl_init:
2965 rtnl_link_unregister(&team_link_ops);
2966
2967err_rtnl_reg:
2968 unregister_netdevice_notifier(&team_notifier_block);
2969
2970 return err;
2971}
2972
2973static void __exit team_module_exit(void)
2974{
2975 team_nl_fini();
2976 rtnl_link_unregister(&team_link_ops);
2977 unregister_netdevice_notifier(&team_notifier_block);
2978}
2979
2980module_init(team_module_init);
2981module_exit(team_module_exit);
2982
2983MODULE_LICENSE("GPL v2");
2984MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
2985MODULE_DESCRIPTION("Ethernet team device driver");
2986MODULE_ALIAS_RTNL_LINK(DRV_NAME);