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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_storage addr;
64
65 memcpy(addr.__data, dev_addr, port_dev->addr_len);
66 addr.ss_family = port_dev->type;
67 return dev_set_mac_address(port_dev, (struct sockaddr *)&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 bool __team_option_inst_tmp_find(const struct list_head *opts,
265 const struct team_option_inst *needle)
266{
267 struct team_option_inst *opt_inst;
268
269 list_for_each_entry(opt_inst, opts, tmp_list)
270 if (opt_inst == needle)
271 return true;
272 return false;
273}
274
275static int __team_options_register(struct team *team,
276 const struct team_option *option,
277 size_t option_count)
278{
279 int i;
280 struct team_option **dst_opts;
281 int err;
282
283 dst_opts = kzalloc(sizeof(struct team_option *) * option_count,
284 GFP_KERNEL);
285 if (!dst_opts)
286 return -ENOMEM;
287 for (i = 0; i < option_count; i++, option++) {
288 if (__team_find_option(team, option->name)) {
289 err = -EEXIST;
290 goto alloc_rollback;
291 }
292 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
293 if (!dst_opts[i]) {
294 err = -ENOMEM;
295 goto alloc_rollback;
296 }
297 }
298
299 for (i = 0; i < option_count; i++) {
300 err = __team_option_inst_add_option(team, dst_opts[i]);
301 if (err)
302 goto inst_rollback;
303 list_add_tail(&dst_opts[i]->list, &team->option_list);
304 }
305
306 kfree(dst_opts);
307 return 0;
308
309inst_rollback:
310 for (i--; i >= 0; i--)
311 __team_option_inst_del_option(team, dst_opts[i]);
312
313 i = option_count - 1;
314alloc_rollback:
315 for (i--; i >= 0; i--)
316 kfree(dst_opts[i]);
317
318 kfree(dst_opts);
319 return err;
320}
321
322static void __team_options_mark_removed(struct team *team,
323 const struct team_option *option,
324 size_t option_count)
325{
326 int i;
327
328 for (i = 0; i < option_count; i++, option++) {
329 struct team_option *del_opt;
330
331 del_opt = __team_find_option(team, option->name);
332 if (del_opt)
333 __team_option_inst_mark_removed_option(team, del_opt);
334 }
335}
336
337static void __team_options_unregister(struct team *team,
338 const struct team_option *option,
339 size_t option_count)
340{
341 int i;
342
343 for (i = 0; i < option_count; i++, option++) {
344 struct team_option *del_opt;
345
346 del_opt = __team_find_option(team, option->name);
347 if (del_opt) {
348 __team_option_inst_del_option(team, del_opt);
349 list_del(&del_opt->list);
350 kfree(del_opt);
351 }
352 }
353}
354
355static void __team_options_change_check(struct team *team);
356
357int team_options_register(struct team *team,
358 const struct team_option *option,
359 size_t option_count)
360{
361 int err;
362
363 err = __team_options_register(team, option, option_count);
364 if (err)
365 return err;
366 __team_options_change_check(team);
367 return 0;
368}
369EXPORT_SYMBOL(team_options_register);
370
371void team_options_unregister(struct team *team,
372 const struct team_option *option,
373 size_t option_count)
374{
375 __team_options_mark_removed(team, option, option_count);
376 __team_options_change_check(team);
377 __team_options_unregister(team, option, option_count);
378}
379EXPORT_SYMBOL(team_options_unregister);
380
381static int team_option_get(struct team *team,
382 struct team_option_inst *opt_inst,
383 struct team_gsetter_ctx *ctx)
384{
385 if (!opt_inst->option->getter)
386 return -EOPNOTSUPP;
387 return opt_inst->option->getter(team, ctx);
388}
389
390static int team_option_set(struct team *team,
391 struct team_option_inst *opt_inst,
392 struct team_gsetter_ctx *ctx)
393{
394 if (!opt_inst->option->setter)
395 return -EOPNOTSUPP;
396 return opt_inst->option->setter(team, ctx);
397}
398
399void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info)
400{
401 struct team_option_inst *opt_inst;
402
403 opt_inst = container_of(opt_inst_info, struct team_option_inst, info);
404 opt_inst->changed = true;
405}
406EXPORT_SYMBOL(team_option_inst_set_change);
407
408void team_options_change_check(struct team *team)
409{
410 __team_options_change_check(team);
411}
412EXPORT_SYMBOL(team_options_change_check);
413
414
415/****************
416 * Mode handling
417 ****************/
418
419static LIST_HEAD(mode_list);
420static DEFINE_SPINLOCK(mode_list_lock);
421
422struct team_mode_item {
423 struct list_head list;
424 const struct team_mode *mode;
425};
426
427static struct team_mode_item *__find_mode(const char *kind)
428{
429 struct team_mode_item *mitem;
430
431 list_for_each_entry(mitem, &mode_list, list) {
432 if (strcmp(mitem->mode->kind, kind) == 0)
433 return mitem;
434 }
435 return NULL;
436}
437
438static bool is_good_mode_name(const char *name)
439{
440 while (*name != '\0') {
441 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
442 return false;
443 name++;
444 }
445 return true;
446}
447
448int team_mode_register(const struct team_mode *mode)
449{
450 int err = 0;
451 struct team_mode_item *mitem;
452
453 if (!is_good_mode_name(mode->kind) ||
454 mode->priv_size > TEAM_MODE_PRIV_SIZE)
455 return -EINVAL;
456
457 mitem = kmalloc(sizeof(*mitem), GFP_KERNEL);
458 if (!mitem)
459 return -ENOMEM;
460
461 spin_lock(&mode_list_lock);
462 if (__find_mode(mode->kind)) {
463 err = -EEXIST;
464 kfree(mitem);
465 goto unlock;
466 }
467 mitem->mode = mode;
468 list_add_tail(&mitem->list, &mode_list);
469unlock:
470 spin_unlock(&mode_list_lock);
471 return err;
472}
473EXPORT_SYMBOL(team_mode_register);
474
475void team_mode_unregister(const struct team_mode *mode)
476{
477 struct team_mode_item *mitem;
478
479 spin_lock(&mode_list_lock);
480 mitem = __find_mode(mode->kind);
481 if (mitem) {
482 list_del_init(&mitem->list);
483 kfree(mitem);
484 }
485 spin_unlock(&mode_list_lock);
486}
487EXPORT_SYMBOL(team_mode_unregister);
488
489static const struct team_mode *team_mode_get(const char *kind)
490{
491 struct team_mode_item *mitem;
492 const struct team_mode *mode = NULL;
493
494 spin_lock(&mode_list_lock);
495 mitem = __find_mode(kind);
496 if (!mitem) {
497 spin_unlock(&mode_list_lock);
498 request_module("team-mode-%s", kind);
499 spin_lock(&mode_list_lock);
500 mitem = __find_mode(kind);
501 }
502 if (mitem) {
503 mode = mitem->mode;
504 if (!try_module_get(mode->owner))
505 mode = NULL;
506 }
507
508 spin_unlock(&mode_list_lock);
509 return mode;
510}
511
512static void team_mode_put(const struct team_mode *mode)
513{
514 module_put(mode->owner);
515}
516
517static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
518{
519 dev_kfree_skb_any(skb);
520 return false;
521}
522
523static rx_handler_result_t team_dummy_receive(struct team *team,
524 struct team_port *port,
525 struct sk_buff *skb)
526{
527 return RX_HANDLER_ANOTHER;
528}
529
530static const struct team_mode __team_no_mode = {
531 .kind = "*NOMODE*",
532};
533
534static bool team_is_mode_set(struct team *team)
535{
536 return team->mode != &__team_no_mode;
537}
538
539static void team_set_no_mode(struct team *team)
540{
541 team->user_carrier_enabled = false;
542 team->mode = &__team_no_mode;
543}
544
545static void team_adjust_ops(struct team *team)
546{
547 /*
548 * To avoid checks in rx/tx skb paths, ensure here that non-null and
549 * correct ops are always set.
550 */
551
552 if (!team->en_port_count || !team_is_mode_set(team) ||
553 !team->mode->ops->transmit)
554 team->ops.transmit = team_dummy_transmit;
555 else
556 team->ops.transmit = team->mode->ops->transmit;
557
558 if (!team->en_port_count || !team_is_mode_set(team) ||
559 !team->mode->ops->receive)
560 team->ops.receive = team_dummy_receive;
561 else
562 team->ops.receive = team->mode->ops->receive;
563}
564
565/*
566 * We can benefit from the fact that it's ensured no port is present
567 * at the time of mode change. Therefore no packets are in fly so there's no
568 * need to set mode operations in any special way.
569 */
570static int __team_change_mode(struct team *team,
571 const struct team_mode *new_mode)
572{
573 /* Check if mode was previously set and do cleanup if so */
574 if (team_is_mode_set(team)) {
575 void (*exit_op)(struct team *team) = team->ops.exit;
576
577 /* Clear ops area so no callback is called any longer */
578 memset(&team->ops, 0, sizeof(struct team_mode_ops));
579 team_adjust_ops(team);
580
581 if (exit_op)
582 exit_op(team);
583 team_mode_put(team->mode);
584 team_set_no_mode(team);
585 /* zero private data area */
586 memset(&team->mode_priv, 0,
587 sizeof(struct team) - offsetof(struct team, mode_priv));
588 }
589
590 if (!new_mode)
591 return 0;
592
593 if (new_mode->ops->init) {
594 int err;
595
596 err = new_mode->ops->init(team);
597 if (err)
598 return err;
599 }
600
601 team->mode = new_mode;
602 memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
603 team_adjust_ops(team);
604
605 return 0;
606}
607
608static int team_change_mode(struct team *team, const char *kind)
609{
610 const struct team_mode *new_mode;
611 struct net_device *dev = team->dev;
612 int err;
613
614 if (!list_empty(&team->port_list)) {
615 netdev_err(dev, "No ports can be present during mode change\n");
616 return -EBUSY;
617 }
618
619 if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) {
620 netdev_err(dev, "Unable to change to the same mode the team is in\n");
621 return -EINVAL;
622 }
623
624 new_mode = team_mode_get(kind);
625 if (!new_mode) {
626 netdev_err(dev, "Mode \"%s\" not found\n", kind);
627 return -EINVAL;
628 }
629
630 err = __team_change_mode(team, new_mode);
631 if (err) {
632 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
633 team_mode_put(new_mode);
634 return err;
635 }
636
637 netdev_info(dev, "Mode changed to \"%s\"\n", kind);
638 return 0;
639}
640
641
642/*********************
643 * Peers notification
644 *********************/
645
646static void team_notify_peers_work(struct work_struct *work)
647{
648 struct team *team;
649 int val;
650
651 team = container_of(work, struct team, notify_peers.dw.work);
652
653 if (!rtnl_trylock()) {
654 schedule_delayed_work(&team->notify_peers.dw, 0);
655 return;
656 }
657 val = atomic_dec_if_positive(&team->notify_peers.count_pending);
658 if (val < 0) {
659 rtnl_unlock();
660 return;
661 }
662 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, team->dev);
663 rtnl_unlock();
664 if (val)
665 schedule_delayed_work(&team->notify_peers.dw,
666 msecs_to_jiffies(team->notify_peers.interval));
667}
668
669static void team_notify_peers(struct team *team)
670{
671 if (!team->notify_peers.count || !netif_running(team->dev))
672 return;
673 atomic_add(team->notify_peers.count, &team->notify_peers.count_pending);
674 schedule_delayed_work(&team->notify_peers.dw, 0);
675}
676
677static void team_notify_peers_init(struct team *team)
678{
679 INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work);
680}
681
682static void team_notify_peers_fini(struct team *team)
683{
684 cancel_delayed_work_sync(&team->notify_peers.dw);
685}
686
687
688/*******************************
689 * Send multicast group rejoins
690 *******************************/
691
692static void team_mcast_rejoin_work(struct work_struct *work)
693{
694 struct team *team;
695 int val;
696
697 team = container_of(work, struct team, mcast_rejoin.dw.work);
698
699 if (!rtnl_trylock()) {
700 schedule_delayed_work(&team->mcast_rejoin.dw, 0);
701 return;
702 }
703 val = atomic_dec_if_positive(&team->mcast_rejoin.count_pending);
704 if (val < 0) {
705 rtnl_unlock();
706 return;
707 }
708 call_netdevice_notifiers(NETDEV_RESEND_IGMP, team->dev);
709 rtnl_unlock();
710 if (val)
711 schedule_delayed_work(&team->mcast_rejoin.dw,
712 msecs_to_jiffies(team->mcast_rejoin.interval));
713}
714
715static void team_mcast_rejoin(struct team *team)
716{
717 if (!team->mcast_rejoin.count || !netif_running(team->dev))
718 return;
719 atomic_add(team->mcast_rejoin.count, &team->mcast_rejoin.count_pending);
720 schedule_delayed_work(&team->mcast_rejoin.dw, 0);
721}
722
723static void team_mcast_rejoin_init(struct team *team)
724{
725 INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work);
726}
727
728static void team_mcast_rejoin_fini(struct team *team)
729{
730 cancel_delayed_work_sync(&team->mcast_rejoin.dw);
731}
732
733
734/************************
735 * Rx path frame handler
736 ************************/
737
738/* note: already called with rcu_read_lock */
739static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
740{
741 struct sk_buff *skb = *pskb;
742 struct team_port *port;
743 struct team *team;
744 rx_handler_result_t res;
745
746 skb = skb_share_check(skb, GFP_ATOMIC);
747 if (!skb)
748 return RX_HANDLER_CONSUMED;
749
750 *pskb = skb;
751
752 port = team_port_get_rcu(skb->dev);
753 team = port->team;
754 if (!team_port_enabled(port)) {
755 /* allow exact match delivery for disabled ports */
756 res = RX_HANDLER_EXACT;
757 } else {
758 res = team->ops.receive(team, port, skb);
759 }
760 if (res == RX_HANDLER_ANOTHER) {
761 struct team_pcpu_stats *pcpu_stats;
762
763 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
764 u64_stats_update_begin(&pcpu_stats->syncp);
765 pcpu_stats->rx_packets++;
766 pcpu_stats->rx_bytes += skb->len;
767 if (skb->pkt_type == PACKET_MULTICAST)
768 pcpu_stats->rx_multicast++;
769 u64_stats_update_end(&pcpu_stats->syncp);
770
771 skb->dev = team->dev;
772 } else if (res == RX_HANDLER_EXACT) {
773 this_cpu_inc(team->pcpu_stats->rx_nohandler);
774 } else {
775 this_cpu_inc(team->pcpu_stats->rx_dropped);
776 }
777
778 return res;
779}
780
781
782/*************************************
783 * Multiqueue Tx port select override
784 *************************************/
785
786static int team_queue_override_init(struct team *team)
787{
788 struct list_head *listarr;
789 unsigned int queue_cnt = team->dev->num_tx_queues - 1;
790 unsigned int i;
791
792 if (!queue_cnt)
793 return 0;
794 listarr = kmalloc(sizeof(struct list_head) * queue_cnt, GFP_KERNEL);
795 if (!listarr)
796 return -ENOMEM;
797 team->qom_lists = listarr;
798 for (i = 0; i < queue_cnt; i++)
799 INIT_LIST_HEAD(listarr++);
800 return 0;
801}
802
803static void team_queue_override_fini(struct team *team)
804{
805 kfree(team->qom_lists);
806}
807
808static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
809{
810 return &team->qom_lists[queue_id - 1];
811}
812
813/*
814 * note: already called with rcu_read_lock
815 */
816static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
817{
818 struct list_head *qom_list;
819 struct team_port *port;
820
821 if (!team->queue_override_enabled || !skb->queue_mapping)
822 return false;
823 qom_list = __team_get_qom_list(team, skb->queue_mapping);
824 list_for_each_entry_rcu(port, qom_list, qom_list) {
825 if (!team_dev_queue_xmit(team, port, skb))
826 return true;
827 }
828 return false;
829}
830
831static void __team_queue_override_port_del(struct team *team,
832 struct team_port *port)
833{
834 if (!port->queue_id)
835 return;
836 list_del_rcu(&port->qom_list);
837}
838
839static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
840 struct team_port *cur)
841{
842 if (port->priority < cur->priority)
843 return true;
844 if (port->priority > cur->priority)
845 return false;
846 if (port->index < cur->index)
847 return true;
848 return false;
849}
850
851static void __team_queue_override_port_add(struct team *team,
852 struct team_port *port)
853{
854 struct team_port *cur;
855 struct list_head *qom_list;
856 struct list_head *node;
857
858 if (!port->queue_id)
859 return;
860 qom_list = __team_get_qom_list(team, port->queue_id);
861 node = qom_list;
862 list_for_each_entry(cur, qom_list, qom_list) {
863 if (team_queue_override_port_has_gt_prio_than(port, cur))
864 break;
865 node = &cur->qom_list;
866 }
867 list_add_tail_rcu(&port->qom_list, node);
868}
869
870static void __team_queue_override_enabled_check(struct team *team)
871{
872 struct team_port *port;
873 bool enabled = false;
874
875 list_for_each_entry(port, &team->port_list, list) {
876 if (port->queue_id) {
877 enabled = true;
878 break;
879 }
880 }
881 if (enabled == team->queue_override_enabled)
882 return;
883 netdev_dbg(team->dev, "%s queue override\n",
884 enabled ? "Enabling" : "Disabling");
885 team->queue_override_enabled = enabled;
886}
887
888static void team_queue_override_port_prio_changed(struct team *team,
889 struct team_port *port)
890{
891 if (!port->queue_id || team_port_enabled(port))
892 return;
893 __team_queue_override_port_del(team, port);
894 __team_queue_override_port_add(team, port);
895 __team_queue_override_enabled_check(team);
896}
897
898static void team_queue_override_port_change_queue_id(struct team *team,
899 struct team_port *port,
900 u16 new_queue_id)
901{
902 if (team_port_enabled(port)) {
903 __team_queue_override_port_del(team, port);
904 port->queue_id = new_queue_id;
905 __team_queue_override_port_add(team, port);
906 __team_queue_override_enabled_check(team);
907 } else {
908 port->queue_id = new_queue_id;
909 }
910}
911
912static void team_queue_override_port_add(struct team *team,
913 struct team_port *port)
914{
915 __team_queue_override_port_add(team, port);
916 __team_queue_override_enabled_check(team);
917}
918
919static void team_queue_override_port_del(struct team *team,
920 struct team_port *port)
921{
922 __team_queue_override_port_del(team, port);
923 __team_queue_override_enabled_check(team);
924}
925
926
927/****************
928 * Port handling
929 ****************/
930
931static bool team_port_find(const struct team *team,
932 const struct team_port *port)
933{
934 struct team_port *cur;
935
936 list_for_each_entry(cur, &team->port_list, list)
937 if (cur == port)
938 return true;
939 return false;
940}
941
942/*
943 * Enable/disable port by adding to enabled port hashlist and setting
944 * port->index (Might be racy so reader could see incorrect ifindex when
945 * processing a flying packet, but that is not a problem). Write guarded
946 * by team->lock.
947 */
948static void team_port_enable(struct team *team,
949 struct team_port *port)
950{
951 if (team_port_enabled(port))
952 return;
953 port->index = team->en_port_count++;
954 hlist_add_head_rcu(&port->hlist,
955 team_port_index_hash(team, port->index));
956 team_adjust_ops(team);
957 team_queue_override_port_add(team, port);
958 if (team->ops.port_enabled)
959 team->ops.port_enabled(team, port);
960 team_notify_peers(team);
961 team_mcast_rejoin(team);
962 team_lower_state_changed(port);
963}
964
965static void __reconstruct_port_hlist(struct team *team, int rm_index)
966{
967 int i;
968 struct team_port *port;
969
970 for (i = rm_index + 1; i < team->en_port_count; i++) {
971 port = team_get_port_by_index(team, i);
972 hlist_del_rcu(&port->hlist);
973 port->index--;
974 hlist_add_head_rcu(&port->hlist,
975 team_port_index_hash(team, port->index));
976 }
977}
978
979static void team_port_disable(struct team *team,
980 struct team_port *port)
981{
982 if (!team_port_enabled(port))
983 return;
984 if (team->ops.port_disabled)
985 team->ops.port_disabled(team, port);
986 hlist_del_rcu(&port->hlist);
987 __reconstruct_port_hlist(team, port->index);
988 port->index = -1;
989 team->en_port_count--;
990 team_queue_override_port_del(team, port);
991 team_adjust_ops(team);
992 team_notify_peers(team);
993 team_mcast_rejoin(team);
994 team_lower_state_changed(port);
995}
996
997#define TEAM_VLAN_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
998 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
999 NETIF_F_HIGHDMA | NETIF_F_LRO)
1000
1001#define TEAM_ENC_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
1002 NETIF_F_RXCSUM | NETIF_F_ALL_TSO)
1003
1004static void __team_compute_features(struct team *team)
1005{
1006 struct team_port *port;
1007 u32 vlan_features = TEAM_VLAN_FEATURES & NETIF_F_ALL_FOR_ALL;
1008 netdev_features_t enc_features = TEAM_ENC_FEATURES;
1009 unsigned short max_hard_header_len = ETH_HLEN;
1010 unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE |
1011 IFF_XMIT_DST_RELEASE_PERM;
1012
1013 list_for_each_entry(port, &team->port_list, list) {
1014 vlan_features = netdev_increment_features(vlan_features,
1015 port->dev->vlan_features,
1016 TEAM_VLAN_FEATURES);
1017 enc_features =
1018 netdev_increment_features(enc_features,
1019 port->dev->hw_enc_features,
1020 TEAM_ENC_FEATURES);
1021
1022
1023 dst_release_flag &= port->dev->priv_flags;
1024 if (port->dev->hard_header_len > max_hard_header_len)
1025 max_hard_header_len = port->dev->hard_header_len;
1026 }
1027
1028 team->dev->vlan_features = vlan_features;
1029 team->dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL;
1030 team->dev->hard_header_len = max_hard_header_len;
1031
1032 team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
1033 if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
1034 team->dev->priv_flags |= IFF_XMIT_DST_RELEASE;
1035}
1036
1037static void team_compute_features(struct team *team)
1038{
1039 mutex_lock(&team->lock);
1040 __team_compute_features(team);
1041 mutex_unlock(&team->lock);
1042 netdev_change_features(team->dev);
1043}
1044
1045static int team_port_enter(struct team *team, struct team_port *port)
1046{
1047 int err = 0;
1048
1049 dev_hold(team->dev);
1050 if (team->ops.port_enter) {
1051 err = team->ops.port_enter(team, port);
1052 if (err) {
1053 netdev_err(team->dev, "Device %s failed to enter team mode\n",
1054 port->dev->name);
1055 goto err_port_enter;
1056 }
1057 }
1058
1059 return 0;
1060
1061err_port_enter:
1062 dev_put(team->dev);
1063
1064 return err;
1065}
1066
1067static void team_port_leave(struct team *team, struct team_port *port)
1068{
1069 if (team->ops.port_leave)
1070 team->ops.port_leave(team, port);
1071 dev_put(team->dev);
1072}
1073
1074#ifdef CONFIG_NET_POLL_CONTROLLER
1075static int __team_port_enable_netpoll(struct team_port *port)
1076{
1077 struct netpoll *np;
1078 int err;
1079
1080 np = kzalloc(sizeof(*np), GFP_KERNEL);
1081 if (!np)
1082 return -ENOMEM;
1083
1084 err = __netpoll_setup(np, port->dev);
1085 if (err) {
1086 kfree(np);
1087 return err;
1088 }
1089 port->np = np;
1090 return err;
1091}
1092
1093static int team_port_enable_netpoll(struct team_port *port)
1094{
1095 if (!port->team->dev->npinfo)
1096 return 0;
1097
1098 return __team_port_enable_netpoll(port);
1099}
1100
1101static void team_port_disable_netpoll(struct team_port *port)
1102{
1103 struct netpoll *np = port->np;
1104
1105 if (!np)
1106 return;
1107 port->np = NULL;
1108
1109 /* Wait for transmitting packets to finish before freeing. */
1110 synchronize_rcu_bh();
1111 __netpoll_cleanup(np);
1112 kfree(np);
1113}
1114#else
1115static int team_port_enable_netpoll(struct team_port *port)
1116{
1117 return 0;
1118}
1119static void team_port_disable_netpoll(struct team_port *port)
1120{
1121}
1122#endif
1123
1124static int team_upper_dev_link(struct team *team, struct team_port *port,
1125 struct netlink_ext_ack *extack)
1126{
1127 struct netdev_lag_upper_info lag_upper_info;
1128 int err;
1129
1130 lag_upper_info.tx_type = team->mode->lag_tx_type;
1131 err = netdev_master_upper_dev_link(port->dev, team->dev, NULL,
1132 &lag_upper_info, extack);
1133 if (err)
1134 return err;
1135 port->dev->priv_flags |= IFF_TEAM_PORT;
1136 return 0;
1137}
1138
1139static void team_upper_dev_unlink(struct team *team, struct team_port *port)
1140{
1141 netdev_upper_dev_unlink(port->dev, team->dev);
1142 port->dev->priv_flags &= ~IFF_TEAM_PORT;
1143}
1144
1145static void __team_port_change_port_added(struct team_port *port, bool linkup);
1146static int team_dev_type_check_change(struct net_device *dev,
1147 struct net_device *port_dev);
1148
1149static int team_port_add(struct team *team, struct net_device *port_dev,
1150 struct netlink_ext_ack *extack)
1151{
1152 struct net_device *dev = team->dev;
1153 struct team_port *port;
1154 char *portname = port_dev->name;
1155 int err;
1156
1157 if (port_dev->flags & IFF_LOOPBACK) {
1158 NL_SET_ERR_MSG(extack, "Loopback device can't be added as a team port");
1159 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1160 portname);
1161 return -EINVAL;
1162 }
1163
1164 if (team_port_exists(port_dev)) {
1165 NL_SET_ERR_MSG(extack, "Device is already a port of a team device");
1166 netdev_err(dev, "Device %s is already a port "
1167 "of a team device\n", portname);
1168 return -EBUSY;
1169 }
1170
1171 if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1172 vlan_uses_dev(dev)) {
1173 NL_SET_ERR_MSG(extack, "Device is VLAN challenged and team device has VLAN set up");
1174 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1175 portname);
1176 return -EPERM;
1177 }
1178
1179 err = team_dev_type_check_change(dev, port_dev);
1180 if (err)
1181 return err;
1182
1183 if (port_dev->flags & IFF_UP) {
1184 NL_SET_ERR_MSG(extack, "Device is up. Set it down before adding it as a team port");
1185 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1186 portname);
1187 return -EBUSY;
1188 }
1189
1190 port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1191 GFP_KERNEL);
1192 if (!port)
1193 return -ENOMEM;
1194
1195 port->dev = port_dev;
1196 port->team = team;
1197 INIT_LIST_HEAD(&port->qom_list);
1198
1199 port->orig.mtu = port_dev->mtu;
1200 err = dev_set_mtu(port_dev, dev->mtu);
1201 if (err) {
1202 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1203 goto err_set_mtu;
1204 }
1205
1206 memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1207
1208 err = team_port_enter(team, port);
1209 if (err) {
1210 netdev_err(dev, "Device %s failed to enter team mode\n",
1211 portname);
1212 goto err_port_enter;
1213 }
1214
1215 err = dev_open(port_dev);
1216 if (err) {
1217 netdev_dbg(dev, "Device %s opening failed\n",
1218 portname);
1219 goto err_dev_open;
1220 }
1221
1222 err = vlan_vids_add_by_dev(port_dev, dev);
1223 if (err) {
1224 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1225 portname);
1226 goto err_vids_add;
1227 }
1228
1229 err = team_port_enable_netpoll(port);
1230 if (err) {
1231 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1232 portname);
1233 goto err_enable_netpoll;
1234 }
1235
1236 if (!(dev->features & NETIF_F_LRO))
1237 dev_disable_lro(port_dev);
1238
1239 err = netdev_rx_handler_register(port_dev, team_handle_frame,
1240 port);
1241 if (err) {
1242 netdev_err(dev, "Device %s failed to register rx_handler\n",
1243 portname);
1244 goto err_handler_register;
1245 }
1246
1247 err = team_upper_dev_link(team, port, extack);
1248 if (err) {
1249 netdev_err(dev, "Device %s failed to set upper link\n",
1250 portname);
1251 goto err_set_upper_link;
1252 }
1253
1254 err = __team_option_inst_add_port(team, port);
1255 if (err) {
1256 netdev_err(dev, "Device %s failed to add per-port options\n",
1257 portname);
1258 goto err_option_port_add;
1259 }
1260
1261 netif_addr_lock_bh(dev);
1262 dev_uc_sync_multiple(port_dev, dev);
1263 dev_mc_sync_multiple(port_dev, dev);
1264 netif_addr_unlock_bh(dev);
1265
1266 port->index = -1;
1267 list_add_tail_rcu(&port->list, &team->port_list);
1268 team_port_enable(team, port);
1269 __team_compute_features(team);
1270 __team_port_change_port_added(port, !!netif_carrier_ok(port_dev));
1271 __team_options_change_check(team);
1272
1273 netdev_info(dev, "Port device %s added\n", portname);
1274
1275 return 0;
1276
1277err_option_port_add:
1278 team_upper_dev_unlink(team, port);
1279
1280err_set_upper_link:
1281 netdev_rx_handler_unregister(port_dev);
1282
1283err_handler_register:
1284 team_port_disable_netpoll(port);
1285
1286err_enable_netpoll:
1287 vlan_vids_del_by_dev(port_dev, dev);
1288
1289err_vids_add:
1290 dev_close(port_dev);
1291
1292err_dev_open:
1293 team_port_leave(team, port);
1294 team_port_set_orig_dev_addr(port);
1295
1296err_port_enter:
1297 dev_set_mtu(port_dev, port->orig.mtu);
1298
1299err_set_mtu:
1300 kfree(port);
1301
1302 return err;
1303}
1304
1305static void __team_port_change_port_removed(struct team_port *port);
1306
1307static int team_port_del(struct team *team, struct net_device *port_dev)
1308{
1309 struct net_device *dev = team->dev;
1310 struct team_port *port;
1311 char *portname = port_dev->name;
1312
1313 port = team_port_get_rtnl(port_dev);
1314 if (!port || !team_port_find(team, port)) {
1315 netdev_err(dev, "Device %s does not act as a port of this team\n",
1316 portname);
1317 return -ENOENT;
1318 }
1319
1320 team_port_disable(team, port);
1321 list_del_rcu(&port->list);
1322 team_upper_dev_unlink(team, port);
1323 netdev_rx_handler_unregister(port_dev);
1324 team_port_disable_netpoll(port);
1325 vlan_vids_del_by_dev(port_dev, dev);
1326 dev_uc_unsync(port_dev, dev);
1327 dev_mc_unsync(port_dev, dev);
1328 dev_close(port_dev);
1329 team_port_leave(team, port);
1330
1331 __team_option_inst_mark_removed_port(team, port);
1332 __team_options_change_check(team);
1333 __team_option_inst_del_port(team, port);
1334 __team_port_change_port_removed(port);
1335
1336 team_port_set_orig_dev_addr(port);
1337 dev_set_mtu(port_dev, port->orig.mtu);
1338 kfree_rcu(port, rcu);
1339 netdev_info(dev, "Port device %s removed\n", portname);
1340 __team_compute_features(team);
1341
1342 return 0;
1343}
1344
1345
1346/*****************
1347 * Net device ops
1348 *****************/
1349
1350static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1351{
1352 ctx->data.str_val = team->mode->kind;
1353 return 0;
1354}
1355
1356static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1357{
1358 return team_change_mode(team, ctx->data.str_val);
1359}
1360
1361static int team_notify_peers_count_get(struct team *team,
1362 struct team_gsetter_ctx *ctx)
1363{
1364 ctx->data.u32_val = team->notify_peers.count;
1365 return 0;
1366}
1367
1368static int team_notify_peers_count_set(struct team *team,
1369 struct team_gsetter_ctx *ctx)
1370{
1371 team->notify_peers.count = ctx->data.u32_val;
1372 return 0;
1373}
1374
1375static int team_notify_peers_interval_get(struct team *team,
1376 struct team_gsetter_ctx *ctx)
1377{
1378 ctx->data.u32_val = team->notify_peers.interval;
1379 return 0;
1380}
1381
1382static int team_notify_peers_interval_set(struct team *team,
1383 struct team_gsetter_ctx *ctx)
1384{
1385 team->notify_peers.interval = ctx->data.u32_val;
1386 return 0;
1387}
1388
1389static int team_mcast_rejoin_count_get(struct team *team,
1390 struct team_gsetter_ctx *ctx)
1391{
1392 ctx->data.u32_val = team->mcast_rejoin.count;
1393 return 0;
1394}
1395
1396static int team_mcast_rejoin_count_set(struct team *team,
1397 struct team_gsetter_ctx *ctx)
1398{
1399 team->mcast_rejoin.count = ctx->data.u32_val;
1400 return 0;
1401}
1402
1403static int team_mcast_rejoin_interval_get(struct team *team,
1404 struct team_gsetter_ctx *ctx)
1405{
1406 ctx->data.u32_val = team->mcast_rejoin.interval;
1407 return 0;
1408}
1409
1410static int team_mcast_rejoin_interval_set(struct team *team,
1411 struct team_gsetter_ctx *ctx)
1412{
1413 team->mcast_rejoin.interval = ctx->data.u32_val;
1414 return 0;
1415}
1416
1417static int team_port_en_option_get(struct team *team,
1418 struct team_gsetter_ctx *ctx)
1419{
1420 struct team_port *port = ctx->info->port;
1421
1422 ctx->data.bool_val = team_port_enabled(port);
1423 return 0;
1424}
1425
1426static int team_port_en_option_set(struct team *team,
1427 struct team_gsetter_ctx *ctx)
1428{
1429 struct team_port *port = ctx->info->port;
1430
1431 if (ctx->data.bool_val)
1432 team_port_enable(team, port);
1433 else
1434 team_port_disable(team, port);
1435 return 0;
1436}
1437
1438static int team_user_linkup_option_get(struct team *team,
1439 struct team_gsetter_ctx *ctx)
1440{
1441 struct team_port *port = ctx->info->port;
1442
1443 ctx->data.bool_val = port->user.linkup;
1444 return 0;
1445}
1446
1447static void __team_carrier_check(struct team *team);
1448
1449static int team_user_linkup_option_set(struct team *team,
1450 struct team_gsetter_ctx *ctx)
1451{
1452 struct team_port *port = ctx->info->port;
1453
1454 port->user.linkup = ctx->data.bool_val;
1455 team_refresh_port_linkup(port);
1456 __team_carrier_check(port->team);
1457 return 0;
1458}
1459
1460static int team_user_linkup_en_option_get(struct team *team,
1461 struct team_gsetter_ctx *ctx)
1462{
1463 struct team_port *port = ctx->info->port;
1464
1465 ctx->data.bool_val = port->user.linkup_enabled;
1466 return 0;
1467}
1468
1469static int team_user_linkup_en_option_set(struct team *team,
1470 struct team_gsetter_ctx *ctx)
1471{
1472 struct team_port *port = ctx->info->port;
1473
1474 port->user.linkup_enabled = ctx->data.bool_val;
1475 team_refresh_port_linkup(port);
1476 __team_carrier_check(port->team);
1477 return 0;
1478}
1479
1480static int team_priority_option_get(struct team *team,
1481 struct team_gsetter_ctx *ctx)
1482{
1483 struct team_port *port = ctx->info->port;
1484
1485 ctx->data.s32_val = port->priority;
1486 return 0;
1487}
1488
1489static int team_priority_option_set(struct team *team,
1490 struct team_gsetter_ctx *ctx)
1491{
1492 struct team_port *port = ctx->info->port;
1493 s32 priority = ctx->data.s32_val;
1494
1495 if (port->priority == priority)
1496 return 0;
1497 port->priority = priority;
1498 team_queue_override_port_prio_changed(team, port);
1499 return 0;
1500}
1501
1502static int team_queue_id_option_get(struct team *team,
1503 struct team_gsetter_ctx *ctx)
1504{
1505 struct team_port *port = ctx->info->port;
1506
1507 ctx->data.u32_val = port->queue_id;
1508 return 0;
1509}
1510
1511static int team_queue_id_option_set(struct team *team,
1512 struct team_gsetter_ctx *ctx)
1513{
1514 struct team_port *port = ctx->info->port;
1515 u16 new_queue_id = ctx->data.u32_val;
1516
1517 if (port->queue_id == new_queue_id)
1518 return 0;
1519 if (new_queue_id >= team->dev->real_num_tx_queues)
1520 return -EINVAL;
1521 team_queue_override_port_change_queue_id(team, port, new_queue_id);
1522 return 0;
1523}
1524
1525static const struct team_option team_options[] = {
1526 {
1527 .name = "mode",
1528 .type = TEAM_OPTION_TYPE_STRING,
1529 .getter = team_mode_option_get,
1530 .setter = team_mode_option_set,
1531 },
1532 {
1533 .name = "notify_peers_count",
1534 .type = TEAM_OPTION_TYPE_U32,
1535 .getter = team_notify_peers_count_get,
1536 .setter = team_notify_peers_count_set,
1537 },
1538 {
1539 .name = "notify_peers_interval",
1540 .type = TEAM_OPTION_TYPE_U32,
1541 .getter = team_notify_peers_interval_get,
1542 .setter = team_notify_peers_interval_set,
1543 },
1544 {
1545 .name = "mcast_rejoin_count",
1546 .type = TEAM_OPTION_TYPE_U32,
1547 .getter = team_mcast_rejoin_count_get,
1548 .setter = team_mcast_rejoin_count_set,
1549 },
1550 {
1551 .name = "mcast_rejoin_interval",
1552 .type = TEAM_OPTION_TYPE_U32,
1553 .getter = team_mcast_rejoin_interval_get,
1554 .setter = team_mcast_rejoin_interval_set,
1555 },
1556 {
1557 .name = "enabled",
1558 .type = TEAM_OPTION_TYPE_BOOL,
1559 .per_port = true,
1560 .getter = team_port_en_option_get,
1561 .setter = team_port_en_option_set,
1562 },
1563 {
1564 .name = "user_linkup",
1565 .type = TEAM_OPTION_TYPE_BOOL,
1566 .per_port = true,
1567 .getter = team_user_linkup_option_get,
1568 .setter = team_user_linkup_option_set,
1569 },
1570 {
1571 .name = "user_linkup_enabled",
1572 .type = TEAM_OPTION_TYPE_BOOL,
1573 .per_port = true,
1574 .getter = team_user_linkup_en_option_get,
1575 .setter = team_user_linkup_en_option_set,
1576 },
1577 {
1578 .name = "priority",
1579 .type = TEAM_OPTION_TYPE_S32,
1580 .per_port = true,
1581 .getter = team_priority_option_get,
1582 .setter = team_priority_option_set,
1583 },
1584 {
1585 .name = "queue_id",
1586 .type = TEAM_OPTION_TYPE_U32,
1587 .per_port = true,
1588 .getter = team_queue_id_option_get,
1589 .setter = team_queue_id_option_set,
1590 },
1591};
1592
1593
1594static int team_init(struct net_device *dev)
1595{
1596 struct team *team = netdev_priv(dev);
1597 int i;
1598 int err;
1599
1600 team->dev = dev;
1601 mutex_init(&team->lock);
1602 team_set_no_mode(team);
1603
1604 team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1605 if (!team->pcpu_stats)
1606 return -ENOMEM;
1607
1608 for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1609 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1610 INIT_LIST_HEAD(&team->port_list);
1611 err = team_queue_override_init(team);
1612 if (err)
1613 goto err_team_queue_override_init;
1614
1615 team_adjust_ops(team);
1616
1617 INIT_LIST_HEAD(&team->option_list);
1618 INIT_LIST_HEAD(&team->option_inst_list);
1619
1620 team_notify_peers_init(team);
1621 team_mcast_rejoin_init(team);
1622
1623 err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1624 if (err)
1625 goto err_options_register;
1626 netif_carrier_off(dev);
1627
1628 netdev_lockdep_set_classes(dev);
1629
1630 return 0;
1631
1632err_options_register:
1633 team_mcast_rejoin_fini(team);
1634 team_notify_peers_fini(team);
1635 team_queue_override_fini(team);
1636err_team_queue_override_init:
1637 free_percpu(team->pcpu_stats);
1638
1639 return err;
1640}
1641
1642static void team_uninit(struct net_device *dev)
1643{
1644 struct team *team = netdev_priv(dev);
1645 struct team_port *port;
1646 struct team_port *tmp;
1647
1648 mutex_lock(&team->lock);
1649 list_for_each_entry_safe(port, tmp, &team->port_list, list)
1650 team_port_del(team, port->dev);
1651
1652 __team_change_mode(team, NULL); /* cleanup */
1653 __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1654 team_mcast_rejoin_fini(team);
1655 team_notify_peers_fini(team);
1656 team_queue_override_fini(team);
1657 mutex_unlock(&team->lock);
1658 netdev_change_features(dev);
1659}
1660
1661static void team_destructor(struct net_device *dev)
1662{
1663 struct team *team = netdev_priv(dev);
1664
1665 free_percpu(team->pcpu_stats);
1666}
1667
1668static int team_open(struct net_device *dev)
1669{
1670 return 0;
1671}
1672
1673static int team_close(struct net_device *dev)
1674{
1675 return 0;
1676}
1677
1678/*
1679 * note: already called with rcu_read_lock
1680 */
1681static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1682{
1683 struct team *team = netdev_priv(dev);
1684 bool tx_success;
1685 unsigned int len = skb->len;
1686
1687 tx_success = team_queue_override_transmit(team, skb);
1688 if (!tx_success)
1689 tx_success = team->ops.transmit(team, skb);
1690 if (tx_success) {
1691 struct team_pcpu_stats *pcpu_stats;
1692
1693 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1694 u64_stats_update_begin(&pcpu_stats->syncp);
1695 pcpu_stats->tx_packets++;
1696 pcpu_stats->tx_bytes += len;
1697 u64_stats_update_end(&pcpu_stats->syncp);
1698 } else {
1699 this_cpu_inc(team->pcpu_stats->tx_dropped);
1700 }
1701
1702 return NETDEV_TX_OK;
1703}
1704
1705static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1706 void *accel_priv, select_queue_fallback_t fallback)
1707{
1708 /*
1709 * This helper function exists to help dev_pick_tx get the correct
1710 * destination queue. Using a helper function skips a call to
1711 * skb_tx_hash and will put the skbs in the queue we expect on their
1712 * way down to the team driver.
1713 */
1714 u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1715
1716 /*
1717 * Save the original txq to restore before passing to the driver
1718 */
1719 qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1720
1721 if (unlikely(txq >= dev->real_num_tx_queues)) {
1722 do {
1723 txq -= dev->real_num_tx_queues;
1724 } while (txq >= dev->real_num_tx_queues);
1725 }
1726 return txq;
1727}
1728
1729static void team_change_rx_flags(struct net_device *dev, int change)
1730{
1731 struct team *team = netdev_priv(dev);
1732 struct team_port *port;
1733 int inc;
1734
1735 rcu_read_lock();
1736 list_for_each_entry_rcu(port, &team->port_list, list) {
1737 if (change & IFF_PROMISC) {
1738 inc = dev->flags & IFF_PROMISC ? 1 : -1;
1739 dev_set_promiscuity(port->dev, inc);
1740 }
1741 if (change & IFF_ALLMULTI) {
1742 inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1743 dev_set_allmulti(port->dev, inc);
1744 }
1745 }
1746 rcu_read_unlock();
1747}
1748
1749static void team_set_rx_mode(struct net_device *dev)
1750{
1751 struct team *team = netdev_priv(dev);
1752 struct team_port *port;
1753
1754 rcu_read_lock();
1755 list_for_each_entry_rcu(port, &team->port_list, list) {
1756 dev_uc_sync_multiple(port->dev, dev);
1757 dev_mc_sync_multiple(port->dev, dev);
1758 }
1759 rcu_read_unlock();
1760}
1761
1762static int team_set_mac_address(struct net_device *dev, void *p)
1763{
1764 struct sockaddr *addr = p;
1765 struct team *team = netdev_priv(dev);
1766 struct team_port *port;
1767
1768 if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1769 return -EADDRNOTAVAIL;
1770 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1771 mutex_lock(&team->lock);
1772 list_for_each_entry(port, &team->port_list, list)
1773 if (team->ops.port_change_dev_addr)
1774 team->ops.port_change_dev_addr(team, port);
1775 mutex_unlock(&team->lock);
1776 return 0;
1777}
1778
1779static int team_change_mtu(struct net_device *dev, int new_mtu)
1780{
1781 struct team *team = netdev_priv(dev);
1782 struct team_port *port;
1783 int err;
1784
1785 /*
1786 * Alhough this is reader, it's guarded by team lock. It's not possible
1787 * to traverse list in reverse under rcu_read_lock
1788 */
1789 mutex_lock(&team->lock);
1790 team->port_mtu_change_allowed = true;
1791 list_for_each_entry(port, &team->port_list, list) {
1792 err = dev_set_mtu(port->dev, new_mtu);
1793 if (err) {
1794 netdev_err(dev, "Device %s failed to change mtu",
1795 port->dev->name);
1796 goto unwind;
1797 }
1798 }
1799 team->port_mtu_change_allowed = false;
1800 mutex_unlock(&team->lock);
1801
1802 dev->mtu = new_mtu;
1803
1804 return 0;
1805
1806unwind:
1807 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1808 dev_set_mtu(port->dev, dev->mtu);
1809 team->port_mtu_change_allowed = false;
1810 mutex_unlock(&team->lock);
1811
1812 return err;
1813}
1814
1815static void
1816team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1817{
1818 struct team *team = netdev_priv(dev);
1819 struct team_pcpu_stats *p;
1820 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1821 u32 rx_dropped = 0, tx_dropped = 0, rx_nohandler = 0;
1822 unsigned int start;
1823 int i;
1824
1825 for_each_possible_cpu(i) {
1826 p = per_cpu_ptr(team->pcpu_stats, i);
1827 do {
1828 start = u64_stats_fetch_begin_irq(&p->syncp);
1829 rx_packets = p->rx_packets;
1830 rx_bytes = p->rx_bytes;
1831 rx_multicast = p->rx_multicast;
1832 tx_packets = p->tx_packets;
1833 tx_bytes = p->tx_bytes;
1834 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
1835
1836 stats->rx_packets += rx_packets;
1837 stats->rx_bytes += rx_bytes;
1838 stats->multicast += rx_multicast;
1839 stats->tx_packets += tx_packets;
1840 stats->tx_bytes += tx_bytes;
1841 /*
1842 * rx_dropped, tx_dropped & rx_nohandler are u32,
1843 * updated without syncp protection.
1844 */
1845 rx_dropped += p->rx_dropped;
1846 tx_dropped += p->tx_dropped;
1847 rx_nohandler += p->rx_nohandler;
1848 }
1849 stats->rx_dropped = rx_dropped;
1850 stats->tx_dropped = tx_dropped;
1851 stats->rx_nohandler = rx_nohandler;
1852}
1853
1854static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1855{
1856 struct team *team = netdev_priv(dev);
1857 struct team_port *port;
1858 int err;
1859
1860 /*
1861 * Alhough this is reader, it's guarded by team lock. It's not possible
1862 * to traverse list in reverse under rcu_read_lock
1863 */
1864 mutex_lock(&team->lock);
1865 list_for_each_entry(port, &team->port_list, list) {
1866 err = vlan_vid_add(port->dev, proto, vid);
1867 if (err)
1868 goto unwind;
1869 }
1870 mutex_unlock(&team->lock);
1871
1872 return 0;
1873
1874unwind:
1875 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1876 vlan_vid_del(port->dev, proto, vid);
1877 mutex_unlock(&team->lock);
1878
1879 return err;
1880}
1881
1882static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1883{
1884 struct team *team = netdev_priv(dev);
1885 struct team_port *port;
1886
1887 mutex_lock(&team->lock);
1888 list_for_each_entry(port, &team->port_list, list)
1889 vlan_vid_del(port->dev, proto, vid);
1890 mutex_unlock(&team->lock);
1891
1892 return 0;
1893}
1894
1895#ifdef CONFIG_NET_POLL_CONTROLLER
1896static void team_poll_controller(struct net_device *dev)
1897{
1898}
1899
1900static void __team_netpoll_cleanup(struct team *team)
1901{
1902 struct team_port *port;
1903
1904 list_for_each_entry(port, &team->port_list, list)
1905 team_port_disable_netpoll(port);
1906}
1907
1908static void team_netpoll_cleanup(struct net_device *dev)
1909{
1910 struct team *team = netdev_priv(dev);
1911
1912 mutex_lock(&team->lock);
1913 __team_netpoll_cleanup(team);
1914 mutex_unlock(&team->lock);
1915}
1916
1917static int team_netpoll_setup(struct net_device *dev,
1918 struct netpoll_info *npifo)
1919{
1920 struct team *team = netdev_priv(dev);
1921 struct team_port *port;
1922 int err = 0;
1923
1924 mutex_lock(&team->lock);
1925 list_for_each_entry(port, &team->port_list, list) {
1926 err = __team_port_enable_netpoll(port);
1927 if (err) {
1928 __team_netpoll_cleanup(team);
1929 break;
1930 }
1931 }
1932 mutex_unlock(&team->lock);
1933 return err;
1934}
1935#endif
1936
1937static int team_add_slave(struct net_device *dev, struct net_device *port_dev,
1938 struct netlink_ext_ack *extack)
1939{
1940 struct team *team = netdev_priv(dev);
1941 int err;
1942
1943 mutex_lock(&team->lock);
1944 err = team_port_add(team, port_dev, extack);
1945 mutex_unlock(&team->lock);
1946
1947 if (!err)
1948 netdev_change_features(dev);
1949
1950 return err;
1951}
1952
1953static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1954{
1955 struct team *team = netdev_priv(dev);
1956 int err;
1957
1958 mutex_lock(&team->lock);
1959 err = team_port_del(team, port_dev);
1960 mutex_unlock(&team->lock);
1961
1962 if (!err)
1963 netdev_change_features(dev);
1964
1965 return err;
1966}
1967
1968static netdev_features_t team_fix_features(struct net_device *dev,
1969 netdev_features_t features)
1970{
1971 struct team_port *port;
1972 struct team *team = netdev_priv(dev);
1973 netdev_features_t mask;
1974
1975 mask = features;
1976 features &= ~NETIF_F_ONE_FOR_ALL;
1977 features |= NETIF_F_ALL_FOR_ALL;
1978
1979 rcu_read_lock();
1980 list_for_each_entry_rcu(port, &team->port_list, list) {
1981 features = netdev_increment_features(features,
1982 port->dev->features,
1983 mask);
1984 }
1985 rcu_read_unlock();
1986
1987 features = netdev_add_tso_features(features, mask);
1988
1989 return features;
1990}
1991
1992static int team_change_carrier(struct net_device *dev, bool new_carrier)
1993{
1994 struct team *team = netdev_priv(dev);
1995
1996 team->user_carrier_enabled = true;
1997
1998 if (new_carrier)
1999 netif_carrier_on(dev);
2000 else
2001 netif_carrier_off(dev);
2002 return 0;
2003}
2004
2005static const struct net_device_ops team_netdev_ops = {
2006 .ndo_init = team_init,
2007 .ndo_uninit = team_uninit,
2008 .ndo_open = team_open,
2009 .ndo_stop = team_close,
2010 .ndo_start_xmit = team_xmit,
2011 .ndo_select_queue = team_select_queue,
2012 .ndo_change_rx_flags = team_change_rx_flags,
2013 .ndo_set_rx_mode = team_set_rx_mode,
2014 .ndo_set_mac_address = team_set_mac_address,
2015 .ndo_change_mtu = team_change_mtu,
2016 .ndo_get_stats64 = team_get_stats64,
2017 .ndo_vlan_rx_add_vid = team_vlan_rx_add_vid,
2018 .ndo_vlan_rx_kill_vid = team_vlan_rx_kill_vid,
2019#ifdef CONFIG_NET_POLL_CONTROLLER
2020 .ndo_poll_controller = team_poll_controller,
2021 .ndo_netpoll_setup = team_netpoll_setup,
2022 .ndo_netpoll_cleanup = team_netpoll_cleanup,
2023#endif
2024 .ndo_add_slave = team_add_slave,
2025 .ndo_del_slave = team_del_slave,
2026 .ndo_fix_features = team_fix_features,
2027 .ndo_change_carrier = team_change_carrier,
2028 .ndo_features_check = passthru_features_check,
2029};
2030
2031/***********************
2032 * ethtool interface
2033 ***********************/
2034
2035static void team_ethtool_get_drvinfo(struct net_device *dev,
2036 struct ethtool_drvinfo *drvinfo)
2037{
2038 strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
2039 strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2040}
2041
2042static const struct ethtool_ops team_ethtool_ops = {
2043 .get_drvinfo = team_ethtool_get_drvinfo,
2044 .get_link = ethtool_op_get_link,
2045};
2046
2047/***********************
2048 * rt netlink interface
2049 ***********************/
2050
2051static void team_setup_by_port(struct net_device *dev,
2052 struct net_device *port_dev)
2053{
2054 dev->header_ops = port_dev->header_ops;
2055 dev->type = port_dev->type;
2056 dev->hard_header_len = port_dev->hard_header_len;
2057 dev->addr_len = port_dev->addr_len;
2058 dev->mtu = port_dev->mtu;
2059 memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2060 eth_hw_addr_inherit(dev, port_dev);
2061}
2062
2063static int team_dev_type_check_change(struct net_device *dev,
2064 struct net_device *port_dev)
2065{
2066 struct team *team = netdev_priv(dev);
2067 char *portname = port_dev->name;
2068 int err;
2069
2070 if (dev->type == port_dev->type)
2071 return 0;
2072 if (!list_empty(&team->port_list)) {
2073 netdev_err(dev, "Device %s is of different type\n", portname);
2074 return -EBUSY;
2075 }
2076 err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2077 err = notifier_to_errno(err);
2078 if (err) {
2079 netdev_err(dev, "Refused to change device type\n");
2080 return err;
2081 }
2082 dev_uc_flush(dev);
2083 dev_mc_flush(dev);
2084 team_setup_by_port(dev, port_dev);
2085 call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2086 return 0;
2087}
2088
2089static void team_setup(struct net_device *dev)
2090{
2091 ether_setup(dev);
2092 dev->max_mtu = ETH_MAX_MTU;
2093
2094 dev->netdev_ops = &team_netdev_ops;
2095 dev->ethtool_ops = &team_ethtool_ops;
2096 dev->needs_free_netdev = true;
2097 dev->priv_destructor = team_destructor;
2098 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2099 dev->priv_flags |= IFF_NO_QUEUE;
2100 dev->priv_flags |= IFF_TEAM;
2101
2102 /*
2103 * Indicate we support unicast address filtering. That way core won't
2104 * bring us to promisc mode in case a unicast addr is added.
2105 * Let this up to underlay drivers.
2106 */
2107 dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2108
2109 dev->features |= NETIF_F_LLTX;
2110 dev->features |= NETIF_F_GRO;
2111
2112 /* Don't allow team devices to change network namespaces. */
2113 dev->features |= NETIF_F_NETNS_LOCAL;
2114
2115 dev->hw_features = TEAM_VLAN_FEATURES |
2116 NETIF_F_HW_VLAN_CTAG_TX |
2117 NETIF_F_HW_VLAN_CTAG_RX |
2118 NETIF_F_HW_VLAN_CTAG_FILTER;
2119
2120 dev->hw_features |= NETIF_F_GSO_ENCAP_ALL;
2121 dev->features |= dev->hw_features;
2122}
2123
2124static int team_newlink(struct net *src_net, struct net_device *dev,
2125 struct nlattr *tb[], struct nlattr *data[],
2126 struct netlink_ext_ack *extack)
2127{
2128 if (tb[IFLA_ADDRESS] == NULL)
2129 eth_hw_addr_random(dev);
2130
2131 return register_netdevice(dev);
2132}
2133
2134static int team_validate(struct nlattr *tb[], struct nlattr *data[],
2135 struct netlink_ext_ack *extack)
2136{
2137 if (tb[IFLA_ADDRESS]) {
2138 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2139 return -EINVAL;
2140 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2141 return -EADDRNOTAVAIL;
2142 }
2143 return 0;
2144}
2145
2146static unsigned int team_get_num_tx_queues(void)
2147{
2148 return TEAM_DEFAULT_NUM_TX_QUEUES;
2149}
2150
2151static unsigned int team_get_num_rx_queues(void)
2152{
2153 return TEAM_DEFAULT_NUM_RX_QUEUES;
2154}
2155
2156static struct rtnl_link_ops team_link_ops __read_mostly = {
2157 .kind = DRV_NAME,
2158 .priv_size = sizeof(struct team),
2159 .setup = team_setup,
2160 .newlink = team_newlink,
2161 .validate = team_validate,
2162 .get_num_tx_queues = team_get_num_tx_queues,
2163 .get_num_rx_queues = team_get_num_rx_queues,
2164};
2165
2166
2167/***********************************
2168 * Generic netlink custom interface
2169 ***********************************/
2170
2171static struct genl_family team_nl_family;
2172
2173static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2174 [TEAM_ATTR_UNSPEC] = { .type = NLA_UNSPEC, },
2175 [TEAM_ATTR_TEAM_IFINDEX] = { .type = NLA_U32 },
2176 [TEAM_ATTR_LIST_OPTION] = { .type = NLA_NESTED },
2177 [TEAM_ATTR_LIST_PORT] = { .type = NLA_NESTED },
2178};
2179
2180static const struct nla_policy
2181team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2182 [TEAM_ATTR_OPTION_UNSPEC] = { .type = NLA_UNSPEC, },
2183 [TEAM_ATTR_OPTION_NAME] = {
2184 .type = NLA_STRING,
2185 .len = TEAM_STRING_MAX_LEN,
2186 },
2187 [TEAM_ATTR_OPTION_CHANGED] = { .type = NLA_FLAG },
2188 [TEAM_ATTR_OPTION_TYPE] = { .type = NLA_U8 },
2189 [TEAM_ATTR_OPTION_DATA] = { .type = NLA_BINARY },
2190};
2191
2192static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2193{
2194 struct sk_buff *msg;
2195 void *hdr;
2196 int err;
2197
2198 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2199 if (!msg)
2200 return -ENOMEM;
2201
2202 hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2203 &team_nl_family, 0, TEAM_CMD_NOOP);
2204 if (!hdr) {
2205 err = -EMSGSIZE;
2206 goto err_msg_put;
2207 }
2208
2209 genlmsg_end(msg, hdr);
2210
2211 return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2212
2213err_msg_put:
2214 nlmsg_free(msg);
2215
2216 return err;
2217}
2218
2219/*
2220 * Netlink cmd functions should be locked by following two functions.
2221 * Since dev gets held here, that ensures dev won't disappear in between.
2222 */
2223static struct team *team_nl_team_get(struct genl_info *info)
2224{
2225 struct net *net = genl_info_net(info);
2226 int ifindex;
2227 struct net_device *dev;
2228 struct team *team;
2229
2230 if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2231 return NULL;
2232
2233 ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2234 dev = dev_get_by_index(net, ifindex);
2235 if (!dev || dev->netdev_ops != &team_netdev_ops) {
2236 if (dev)
2237 dev_put(dev);
2238 return NULL;
2239 }
2240
2241 team = netdev_priv(dev);
2242 mutex_lock(&team->lock);
2243 return team;
2244}
2245
2246static void team_nl_team_put(struct team *team)
2247{
2248 mutex_unlock(&team->lock);
2249 dev_put(team->dev);
2250}
2251
2252typedef int team_nl_send_func_t(struct sk_buff *skb,
2253 struct team *team, u32 portid);
2254
2255static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2256{
2257 return genlmsg_unicast(dev_net(team->dev), skb, portid);
2258}
2259
2260static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2261 struct team_option_inst *opt_inst)
2262{
2263 struct nlattr *option_item;
2264 struct team_option *option = opt_inst->option;
2265 struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2266 struct team_gsetter_ctx ctx;
2267 int err;
2268
2269 ctx.info = opt_inst_info;
2270 err = team_option_get(team, opt_inst, &ctx);
2271 if (err)
2272 return err;
2273
2274 option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
2275 if (!option_item)
2276 return -EMSGSIZE;
2277
2278 if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2279 goto nest_cancel;
2280 if (opt_inst_info->port &&
2281 nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2282 opt_inst_info->port->dev->ifindex))
2283 goto nest_cancel;
2284 if (opt_inst->option->array_size &&
2285 nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2286 opt_inst_info->array_index))
2287 goto nest_cancel;
2288
2289 switch (option->type) {
2290 case TEAM_OPTION_TYPE_U32:
2291 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2292 goto nest_cancel;
2293 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2294 goto nest_cancel;
2295 break;
2296 case TEAM_OPTION_TYPE_STRING:
2297 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2298 goto nest_cancel;
2299 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2300 ctx.data.str_val))
2301 goto nest_cancel;
2302 break;
2303 case TEAM_OPTION_TYPE_BINARY:
2304 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2305 goto nest_cancel;
2306 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2307 ctx.data.bin_val.ptr))
2308 goto nest_cancel;
2309 break;
2310 case TEAM_OPTION_TYPE_BOOL:
2311 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2312 goto nest_cancel;
2313 if (ctx.data.bool_val &&
2314 nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2315 goto nest_cancel;
2316 break;
2317 case TEAM_OPTION_TYPE_S32:
2318 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2319 goto nest_cancel;
2320 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2321 goto nest_cancel;
2322 break;
2323 default:
2324 BUG();
2325 }
2326 if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2327 goto nest_cancel;
2328 if (opt_inst->changed) {
2329 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2330 goto nest_cancel;
2331 opt_inst->changed = false;
2332 }
2333 nla_nest_end(skb, option_item);
2334 return 0;
2335
2336nest_cancel:
2337 nla_nest_cancel(skb, option_item);
2338 return -EMSGSIZE;
2339}
2340
2341static int __send_and_alloc_skb(struct sk_buff **pskb,
2342 struct team *team, u32 portid,
2343 team_nl_send_func_t *send_func)
2344{
2345 int err;
2346
2347 if (*pskb) {
2348 err = send_func(*pskb, team, portid);
2349 if (err)
2350 return err;
2351 }
2352 *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2353 if (!*pskb)
2354 return -ENOMEM;
2355 return 0;
2356}
2357
2358static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2359 int flags, team_nl_send_func_t *send_func,
2360 struct list_head *sel_opt_inst_list)
2361{
2362 struct nlattr *option_list;
2363 struct nlmsghdr *nlh;
2364 void *hdr;
2365 struct team_option_inst *opt_inst;
2366 int err;
2367 struct sk_buff *skb = NULL;
2368 bool incomplete;
2369 int i;
2370
2371 opt_inst = list_first_entry(sel_opt_inst_list,
2372 struct team_option_inst, tmp_list);
2373
2374start_again:
2375 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2376 if (err)
2377 return err;
2378
2379 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2380 TEAM_CMD_OPTIONS_GET);
2381 if (!hdr) {
2382 nlmsg_free(skb);
2383 return -EMSGSIZE;
2384 }
2385
2386 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2387 goto nla_put_failure;
2388 option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2389 if (!option_list)
2390 goto nla_put_failure;
2391
2392 i = 0;
2393 incomplete = false;
2394 list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2395 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2396 if (err) {
2397 if (err == -EMSGSIZE) {
2398 if (!i)
2399 goto errout;
2400 incomplete = true;
2401 break;
2402 }
2403 goto errout;
2404 }
2405 i++;
2406 }
2407
2408 nla_nest_end(skb, option_list);
2409 genlmsg_end(skb, hdr);
2410 if (incomplete)
2411 goto start_again;
2412
2413send_done:
2414 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2415 if (!nlh) {
2416 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2417 if (err)
2418 return err;
2419 goto send_done;
2420 }
2421
2422 return send_func(skb, team, portid);
2423
2424nla_put_failure:
2425 err = -EMSGSIZE;
2426errout:
2427 genlmsg_cancel(skb, hdr);
2428 nlmsg_free(skb);
2429 return err;
2430}
2431
2432static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2433{
2434 struct team *team;
2435 struct team_option_inst *opt_inst;
2436 int err;
2437 LIST_HEAD(sel_opt_inst_list);
2438
2439 team = team_nl_team_get(info);
2440 if (!team)
2441 return -EINVAL;
2442
2443 list_for_each_entry(opt_inst, &team->option_inst_list, list)
2444 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2445 err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2446 NLM_F_ACK, team_nl_send_unicast,
2447 &sel_opt_inst_list);
2448
2449 team_nl_team_put(team);
2450
2451 return err;
2452}
2453
2454static int team_nl_send_event_options_get(struct team *team,
2455 struct list_head *sel_opt_inst_list);
2456
2457static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2458{
2459 struct team *team;
2460 int err = 0;
2461 int i;
2462 struct nlattr *nl_option;
2463 LIST_HEAD(opt_inst_list);
2464
2465 rtnl_lock();
2466
2467 team = team_nl_team_get(info);
2468 if (!team) {
2469 err = -EINVAL;
2470 goto rtnl_unlock;
2471 }
2472
2473 err = -EINVAL;
2474 if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2475 err = -EINVAL;
2476 goto team_put;
2477 }
2478
2479 nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2480 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2481 struct nlattr *attr;
2482 struct nlattr *attr_data;
2483 enum team_option_type opt_type;
2484 int opt_port_ifindex = 0; /* != 0 for per-port options */
2485 u32 opt_array_index = 0;
2486 bool opt_is_array = false;
2487 struct team_option_inst *opt_inst;
2488 char *opt_name;
2489 bool opt_found = false;
2490
2491 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2492 err = -EINVAL;
2493 goto team_put;
2494 }
2495 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2496 nl_option, team_nl_option_policy,
2497 info->extack);
2498 if (err)
2499 goto team_put;
2500 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2501 !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2502 err = -EINVAL;
2503 goto team_put;
2504 }
2505 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2506 case NLA_U32:
2507 opt_type = TEAM_OPTION_TYPE_U32;
2508 break;
2509 case NLA_STRING:
2510 opt_type = TEAM_OPTION_TYPE_STRING;
2511 break;
2512 case NLA_BINARY:
2513 opt_type = TEAM_OPTION_TYPE_BINARY;
2514 break;
2515 case NLA_FLAG:
2516 opt_type = TEAM_OPTION_TYPE_BOOL;
2517 break;
2518 case NLA_S32:
2519 opt_type = TEAM_OPTION_TYPE_S32;
2520 break;
2521 default:
2522 goto team_put;
2523 }
2524
2525 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2526 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2527 err = -EINVAL;
2528 goto team_put;
2529 }
2530
2531 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2532 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2533 if (attr)
2534 opt_port_ifindex = nla_get_u32(attr);
2535
2536 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2537 if (attr) {
2538 opt_is_array = true;
2539 opt_array_index = nla_get_u32(attr);
2540 }
2541
2542 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2543 struct team_option *option = opt_inst->option;
2544 struct team_gsetter_ctx ctx;
2545 struct team_option_inst_info *opt_inst_info;
2546 int tmp_ifindex;
2547
2548 opt_inst_info = &opt_inst->info;
2549 tmp_ifindex = opt_inst_info->port ?
2550 opt_inst_info->port->dev->ifindex : 0;
2551 if (option->type != opt_type ||
2552 strcmp(option->name, opt_name) ||
2553 tmp_ifindex != opt_port_ifindex ||
2554 (option->array_size && !opt_is_array) ||
2555 opt_inst_info->array_index != opt_array_index)
2556 continue;
2557 opt_found = true;
2558 ctx.info = opt_inst_info;
2559 switch (opt_type) {
2560 case TEAM_OPTION_TYPE_U32:
2561 ctx.data.u32_val = nla_get_u32(attr_data);
2562 break;
2563 case TEAM_OPTION_TYPE_STRING:
2564 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2565 err = -EINVAL;
2566 goto team_put;
2567 }
2568 ctx.data.str_val = nla_data(attr_data);
2569 break;
2570 case TEAM_OPTION_TYPE_BINARY:
2571 ctx.data.bin_val.len = nla_len(attr_data);
2572 ctx.data.bin_val.ptr = nla_data(attr_data);
2573 break;
2574 case TEAM_OPTION_TYPE_BOOL:
2575 ctx.data.bool_val = attr_data ? true : false;
2576 break;
2577 case TEAM_OPTION_TYPE_S32:
2578 ctx.data.s32_val = nla_get_s32(attr_data);
2579 break;
2580 default:
2581 BUG();
2582 }
2583 err = team_option_set(team, opt_inst, &ctx);
2584 if (err)
2585 goto team_put;
2586 opt_inst->changed = true;
2587
2588 /* dumb/evil user-space can send us duplicate opt,
2589 * keep only the last one
2590 */
2591 if (__team_option_inst_tmp_find(&opt_inst_list,
2592 opt_inst))
2593 continue;
2594
2595 list_add(&opt_inst->tmp_list, &opt_inst_list);
2596 }
2597 if (!opt_found) {
2598 err = -ENOENT;
2599 goto team_put;
2600 }
2601 }
2602
2603 err = team_nl_send_event_options_get(team, &opt_inst_list);
2604
2605team_put:
2606 team_nl_team_put(team);
2607rtnl_unlock:
2608 rtnl_unlock();
2609 return err;
2610}
2611
2612static int team_nl_fill_one_port_get(struct sk_buff *skb,
2613 struct team_port *port)
2614{
2615 struct nlattr *port_item;
2616
2617 port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2618 if (!port_item)
2619 goto nest_cancel;
2620 if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2621 goto nest_cancel;
2622 if (port->changed) {
2623 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2624 goto nest_cancel;
2625 port->changed = false;
2626 }
2627 if ((port->removed &&
2628 nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2629 (port->state.linkup &&
2630 nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2631 nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2632 nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2633 goto nest_cancel;
2634 nla_nest_end(skb, port_item);
2635 return 0;
2636
2637nest_cancel:
2638 nla_nest_cancel(skb, port_item);
2639 return -EMSGSIZE;
2640}
2641
2642static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2643 int flags, team_nl_send_func_t *send_func,
2644 struct team_port *one_port)
2645{
2646 struct nlattr *port_list;
2647 struct nlmsghdr *nlh;
2648 void *hdr;
2649 struct team_port *port;
2650 int err;
2651 struct sk_buff *skb = NULL;
2652 bool incomplete;
2653 int i;
2654
2655 port = list_first_entry_or_null(&team->port_list,
2656 struct team_port, list);
2657
2658start_again:
2659 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2660 if (err)
2661 return err;
2662
2663 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2664 TEAM_CMD_PORT_LIST_GET);
2665 if (!hdr) {
2666 nlmsg_free(skb);
2667 return -EMSGSIZE;
2668 }
2669
2670 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2671 goto nla_put_failure;
2672 port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2673 if (!port_list)
2674 goto nla_put_failure;
2675
2676 i = 0;
2677 incomplete = false;
2678
2679 /* If one port is selected, called wants to send port list containing
2680 * only this port. Otherwise go through all listed ports and send all
2681 */
2682 if (one_port) {
2683 err = team_nl_fill_one_port_get(skb, one_port);
2684 if (err)
2685 goto errout;
2686 } else if (port) {
2687 list_for_each_entry_from(port, &team->port_list, list) {
2688 err = team_nl_fill_one_port_get(skb, port);
2689 if (err) {
2690 if (err == -EMSGSIZE) {
2691 if (!i)
2692 goto errout;
2693 incomplete = true;
2694 break;
2695 }
2696 goto errout;
2697 }
2698 i++;
2699 }
2700 }
2701
2702 nla_nest_end(skb, port_list);
2703 genlmsg_end(skb, hdr);
2704 if (incomplete)
2705 goto start_again;
2706
2707send_done:
2708 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2709 if (!nlh) {
2710 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2711 if (err)
2712 return err;
2713 goto send_done;
2714 }
2715
2716 return send_func(skb, team, portid);
2717
2718nla_put_failure:
2719 err = -EMSGSIZE;
2720errout:
2721 genlmsg_cancel(skb, hdr);
2722 nlmsg_free(skb);
2723 return err;
2724}
2725
2726static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2727 struct genl_info *info)
2728{
2729 struct team *team;
2730 int err;
2731
2732 team = team_nl_team_get(info);
2733 if (!team)
2734 return -EINVAL;
2735
2736 err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2737 NLM_F_ACK, team_nl_send_unicast, NULL);
2738
2739 team_nl_team_put(team);
2740
2741 return err;
2742}
2743
2744static const struct genl_ops team_nl_ops[] = {
2745 {
2746 .cmd = TEAM_CMD_NOOP,
2747 .doit = team_nl_cmd_noop,
2748 .policy = team_nl_policy,
2749 },
2750 {
2751 .cmd = TEAM_CMD_OPTIONS_SET,
2752 .doit = team_nl_cmd_options_set,
2753 .policy = team_nl_policy,
2754 .flags = GENL_ADMIN_PERM,
2755 },
2756 {
2757 .cmd = TEAM_CMD_OPTIONS_GET,
2758 .doit = team_nl_cmd_options_get,
2759 .policy = team_nl_policy,
2760 .flags = GENL_ADMIN_PERM,
2761 },
2762 {
2763 .cmd = TEAM_CMD_PORT_LIST_GET,
2764 .doit = team_nl_cmd_port_list_get,
2765 .policy = team_nl_policy,
2766 .flags = GENL_ADMIN_PERM,
2767 },
2768};
2769
2770static const struct genl_multicast_group team_nl_mcgrps[] = {
2771 { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2772};
2773
2774static struct genl_family team_nl_family __ro_after_init = {
2775 .name = TEAM_GENL_NAME,
2776 .version = TEAM_GENL_VERSION,
2777 .maxattr = TEAM_ATTR_MAX,
2778 .netnsok = true,
2779 .module = THIS_MODULE,
2780 .ops = team_nl_ops,
2781 .n_ops = ARRAY_SIZE(team_nl_ops),
2782 .mcgrps = team_nl_mcgrps,
2783 .n_mcgrps = ARRAY_SIZE(team_nl_mcgrps),
2784};
2785
2786static int team_nl_send_multicast(struct sk_buff *skb,
2787 struct team *team, u32 portid)
2788{
2789 return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2790 skb, 0, 0, GFP_KERNEL);
2791}
2792
2793static int team_nl_send_event_options_get(struct team *team,
2794 struct list_head *sel_opt_inst_list)
2795{
2796 return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2797 sel_opt_inst_list);
2798}
2799
2800static int team_nl_send_event_port_get(struct team *team,
2801 struct team_port *port)
2802{
2803 return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2804 port);
2805}
2806
2807static int __init team_nl_init(void)
2808{
2809 return genl_register_family(&team_nl_family);
2810}
2811
2812static void team_nl_fini(void)
2813{
2814 genl_unregister_family(&team_nl_family);
2815}
2816
2817
2818/******************
2819 * Change checkers
2820 ******************/
2821
2822static void __team_options_change_check(struct team *team)
2823{
2824 int err;
2825 struct team_option_inst *opt_inst;
2826 LIST_HEAD(sel_opt_inst_list);
2827
2828 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2829 if (opt_inst->changed)
2830 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2831 }
2832 err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2833 if (err && err != -ESRCH)
2834 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2835 err);
2836}
2837
2838/* rtnl lock is held */
2839
2840static void __team_port_change_send(struct team_port *port, bool linkup)
2841{
2842 int err;
2843
2844 port->changed = true;
2845 port->state.linkup = linkup;
2846 team_refresh_port_linkup(port);
2847 if (linkup) {
2848 struct ethtool_link_ksettings ecmd;
2849
2850 err = __ethtool_get_link_ksettings(port->dev, &ecmd);
2851 if (!err) {
2852 port->state.speed = ecmd.base.speed;
2853 port->state.duplex = ecmd.base.duplex;
2854 goto send_event;
2855 }
2856 }
2857 port->state.speed = 0;
2858 port->state.duplex = 0;
2859
2860send_event:
2861 err = team_nl_send_event_port_get(port->team, port);
2862 if (err && err != -ESRCH)
2863 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2864 port->dev->name, err);
2865
2866}
2867
2868static void __team_carrier_check(struct team *team)
2869{
2870 struct team_port *port;
2871 bool team_linkup;
2872
2873 if (team->user_carrier_enabled)
2874 return;
2875
2876 team_linkup = false;
2877 list_for_each_entry(port, &team->port_list, list) {
2878 if (port->linkup) {
2879 team_linkup = true;
2880 break;
2881 }
2882 }
2883
2884 if (team_linkup)
2885 netif_carrier_on(team->dev);
2886 else
2887 netif_carrier_off(team->dev);
2888}
2889
2890static void __team_port_change_check(struct team_port *port, bool linkup)
2891{
2892 if (port->state.linkup != linkup)
2893 __team_port_change_send(port, linkup);
2894 __team_carrier_check(port->team);
2895}
2896
2897static void __team_port_change_port_added(struct team_port *port, bool linkup)
2898{
2899 __team_port_change_send(port, linkup);
2900 __team_carrier_check(port->team);
2901}
2902
2903static void __team_port_change_port_removed(struct team_port *port)
2904{
2905 port->removed = true;
2906 __team_port_change_send(port, false);
2907 __team_carrier_check(port->team);
2908}
2909
2910static void team_port_change_check(struct team_port *port, bool linkup)
2911{
2912 struct team *team = port->team;
2913
2914 mutex_lock(&team->lock);
2915 __team_port_change_check(port, linkup);
2916 mutex_unlock(&team->lock);
2917}
2918
2919
2920/************************************
2921 * Net device notifier event handler
2922 ************************************/
2923
2924static int team_device_event(struct notifier_block *unused,
2925 unsigned long event, void *ptr)
2926{
2927 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2928 struct team_port *port;
2929
2930 port = team_port_get_rtnl(dev);
2931 if (!port)
2932 return NOTIFY_DONE;
2933
2934 switch (event) {
2935 case NETDEV_UP:
2936 if (netif_carrier_ok(dev))
2937 team_port_change_check(port, true);
2938 break;
2939 case NETDEV_DOWN:
2940 team_port_change_check(port, false);
2941 break;
2942 case NETDEV_CHANGE:
2943 if (netif_running(port->dev))
2944 team_port_change_check(port,
2945 !!netif_carrier_ok(port->dev));
2946 break;
2947 case NETDEV_UNREGISTER:
2948 team_del_slave(port->team->dev, dev);
2949 break;
2950 case NETDEV_FEAT_CHANGE:
2951 team_compute_features(port->team);
2952 break;
2953 case NETDEV_PRECHANGEMTU:
2954 /* Forbid to change mtu of underlaying device */
2955 if (!port->team->port_mtu_change_allowed)
2956 return NOTIFY_BAD;
2957 break;
2958 case NETDEV_PRE_TYPE_CHANGE:
2959 /* Forbid to change type of underlaying device */
2960 return NOTIFY_BAD;
2961 case NETDEV_RESEND_IGMP:
2962 /* Propagate to master device */
2963 call_netdevice_notifiers(event, port->team->dev);
2964 break;
2965 }
2966 return NOTIFY_DONE;
2967}
2968
2969static struct notifier_block team_notifier_block __read_mostly = {
2970 .notifier_call = team_device_event,
2971};
2972
2973
2974/***********************
2975 * Module init and exit
2976 ***********************/
2977
2978static int __init team_module_init(void)
2979{
2980 int err;
2981
2982 register_netdevice_notifier(&team_notifier_block);
2983
2984 err = rtnl_link_register(&team_link_ops);
2985 if (err)
2986 goto err_rtnl_reg;
2987
2988 err = team_nl_init();
2989 if (err)
2990 goto err_nl_init;
2991
2992 return 0;
2993
2994err_nl_init:
2995 rtnl_link_unregister(&team_link_ops);
2996
2997err_rtnl_reg:
2998 unregister_netdevice_notifier(&team_notifier_block);
2999
3000 return err;
3001}
3002
3003static void __exit team_module_exit(void)
3004{
3005 team_nl_fini();
3006 rtnl_link_unregister(&team_link_ops);
3007 unregister_netdevice_notifier(&team_notifier_block);
3008}
3009
3010module_init(team_module_init);
3011module_exit(team_module_exit);
3012
3013MODULE_LICENSE("GPL v2");
3014MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
3015MODULE_DESCRIPTION("Ethernet team device driver");
3016MODULE_ALIAS_RTNL_LINK(DRV_NAME);
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * drivers/net/team/team.c - Network team device driver
4 * Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com>
5 */
6
7#include <linux/kernel.h>
8#include <linux/types.h>
9#include <linux/module.h>
10#include <linux/init.h>
11#include <linux/slab.h>
12#include <linux/rcupdate.h>
13#include <linux/errno.h>
14#include <linux/ctype.h>
15#include <linux/notifier.h>
16#include <linux/netdevice.h>
17#include <linux/netpoll.h>
18#include <linux/if_vlan.h>
19#include <linux/if_arp.h>
20#include <linux/socket.h>
21#include <linux/etherdevice.h>
22#include <linux/rtnetlink.h>
23#include <net/rtnetlink.h>
24#include <net/genetlink.h>
25#include <net/netlink.h>
26#include <net/sch_generic.h>
27#include <generated/utsrelease.h>
28#include <linux/if_team.h>
29
30#define DRV_NAME "team"
31
32
33/**********
34 * Helpers
35 **********/
36
37static struct team_port *team_port_get_rtnl(const struct net_device *dev)
38{
39 struct team_port *port = rtnl_dereference(dev->rx_handler_data);
40
41 return netif_is_team_port(dev) ? port : NULL;
42}
43
44/*
45 * Since the ability to change device address for open port device is tested in
46 * team_port_add, this function can be called without control of return value
47 */
48static int __set_port_dev_addr(struct net_device *port_dev,
49 const unsigned char *dev_addr)
50{
51 struct sockaddr_storage addr;
52
53 memcpy(addr.__data, dev_addr, port_dev->addr_len);
54 addr.ss_family = port_dev->type;
55 return dev_set_mac_address(port_dev, (struct sockaddr *)&addr, NULL);
56}
57
58static int team_port_set_orig_dev_addr(struct team_port *port)
59{
60 return __set_port_dev_addr(port->dev, port->orig.dev_addr);
61}
62
63static int team_port_set_team_dev_addr(struct team *team,
64 struct team_port *port)
65{
66 return __set_port_dev_addr(port->dev, team->dev->dev_addr);
67}
68
69int team_modeop_port_enter(struct team *team, struct team_port *port)
70{
71 return team_port_set_team_dev_addr(team, port);
72}
73EXPORT_SYMBOL(team_modeop_port_enter);
74
75void team_modeop_port_change_dev_addr(struct team *team,
76 struct team_port *port)
77{
78 team_port_set_team_dev_addr(team, port);
79}
80EXPORT_SYMBOL(team_modeop_port_change_dev_addr);
81
82static void team_lower_state_changed(struct team_port *port)
83{
84 struct netdev_lag_lower_state_info info;
85
86 info.link_up = port->linkup;
87 info.tx_enabled = team_port_enabled(port);
88 netdev_lower_state_changed(port->dev, &info);
89}
90
91static void team_refresh_port_linkup(struct team_port *port)
92{
93 bool new_linkup = port->user.linkup_enabled ? port->user.linkup :
94 port->state.linkup;
95
96 if (port->linkup != new_linkup) {
97 port->linkup = new_linkup;
98 team_lower_state_changed(port);
99 }
100}
101
102
103/*******************
104 * Options handling
105 *******************/
106
107struct team_option_inst { /* One for each option instance */
108 struct list_head list;
109 struct list_head tmp_list;
110 struct team_option *option;
111 struct team_option_inst_info info;
112 bool changed;
113 bool removed;
114};
115
116static struct team_option *__team_find_option(struct team *team,
117 const char *opt_name)
118{
119 struct team_option *option;
120
121 list_for_each_entry(option, &team->option_list, list) {
122 if (strcmp(option->name, opt_name) == 0)
123 return option;
124 }
125 return NULL;
126}
127
128static void __team_option_inst_del(struct team_option_inst *opt_inst)
129{
130 list_del(&opt_inst->list);
131 kfree(opt_inst);
132}
133
134static void __team_option_inst_del_option(struct team *team,
135 struct team_option *option)
136{
137 struct team_option_inst *opt_inst, *tmp;
138
139 list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
140 if (opt_inst->option == option)
141 __team_option_inst_del(opt_inst);
142 }
143}
144
145static int __team_option_inst_add(struct team *team, struct team_option *option,
146 struct team_port *port)
147{
148 struct team_option_inst *opt_inst;
149 unsigned int array_size;
150 unsigned int i;
151 int err;
152
153 array_size = option->array_size;
154 if (!array_size)
155 array_size = 1; /* No array but still need one instance */
156
157 for (i = 0; i < array_size; i++) {
158 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL);
159 if (!opt_inst)
160 return -ENOMEM;
161 opt_inst->option = option;
162 opt_inst->info.port = port;
163 opt_inst->info.array_index = i;
164 opt_inst->changed = true;
165 opt_inst->removed = false;
166 list_add_tail(&opt_inst->list, &team->option_inst_list);
167 if (option->init) {
168 err = option->init(team, &opt_inst->info);
169 if (err)
170 return err;
171 }
172
173 }
174 return 0;
175}
176
177static int __team_option_inst_add_option(struct team *team,
178 struct team_option *option)
179{
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 return 0;
188
189inst_del_option:
190 __team_option_inst_del_option(team, option);
191 return err;
192}
193
194static void __team_option_inst_mark_removed_option(struct team *team,
195 struct team_option *option)
196{
197 struct team_option_inst *opt_inst;
198
199 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
200 if (opt_inst->option == option) {
201 opt_inst->changed = true;
202 opt_inst->removed = true;
203 }
204 }
205}
206
207static void __team_option_inst_del_port(struct team *team,
208 struct team_port *port)
209{
210 struct team_option_inst *opt_inst, *tmp;
211
212 list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
213 if (opt_inst->option->per_port &&
214 opt_inst->info.port == port)
215 __team_option_inst_del(opt_inst);
216 }
217}
218
219static int __team_option_inst_add_port(struct team *team,
220 struct team_port *port)
221{
222 struct team_option *option;
223 int err;
224
225 list_for_each_entry(option, &team->option_list, list) {
226 if (!option->per_port)
227 continue;
228 err = __team_option_inst_add(team, option, port);
229 if (err)
230 goto inst_del_port;
231 }
232 return 0;
233
234inst_del_port:
235 __team_option_inst_del_port(team, port);
236 return err;
237}
238
239static void __team_option_inst_mark_removed_port(struct team *team,
240 struct team_port *port)
241{
242 struct team_option_inst *opt_inst;
243
244 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
245 if (opt_inst->info.port == port) {
246 opt_inst->changed = true;
247 opt_inst->removed = true;
248 }
249 }
250}
251
252static int __team_options_register(struct team *team,
253 const struct team_option *option,
254 size_t option_count)
255{
256 int i;
257 struct team_option **dst_opts;
258 int err;
259
260 dst_opts = kcalloc(option_count, sizeof(struct team_option *),
261 GFP_KERNEL);
262 if (!dst_opts)
263 return -ENOMEM;
264 for (i = 0; i < option_count; i++, option++) {
265 if (__team_find_option(team, option->name)) {
266 err = -EEXIST;
267 goto alloc_rollback;
268 }
269 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
270 if (!dst_opts[i]) {
271 err = -ENOMEM;
272 goto alloc_rollback;
273 }
274 }
275
276 for (i = 0; i < option_count; i++) {
277 err = __team_option_inst_add_option(team, dst_opts[i]);
278 if (err)
279 goto inst_rollback;
280 list_add_tail(&dst_opts[i]->list, &team->option_list);
281 }
282
283 kfree(dst_opts);
284 return 0;
285
286inst_rollback:
287 for (i--; i >= 0; i--)
288 __team_option_inst_del_option(team, dst_opts[i]);
289
290 i = option_count - 1;
291alloc_rollback:
292 for (i--; i >= 0; i--)
293 kfree(dst_opts[i]);
294
295 kfree(dst_opts);
296 return err;
297}
298
299static void __team_options_mark_removed(struct team *team,
300 const struct team_option *option,
301 size_t option_count)
302{
303 int i;
304
305 for (i = 0; i < option_count; i++, option++) {
306 struct team_option *del_opt;
307
308 del_opt = __team_find_option(team, option->name);
309 if (del_opt)
310 __team_option_inst_mark_removed_option(team, del_opt);
311 }
312}
313
314static void __team_options_unregister(struct team *team,
315 const struct team_option *option,
316 size_t option_count)
317{
318 int i;
319
320 for (i = 0; i < option_count; i++, option++) {
321 struct team_option *del_opt;
322
323 del_opt = __team_find_option(team, option->name);
324 if (del_opt) {
325 __team_option_inst_del_option(team, del_opt);
326 list_del(&del_opt->list);
327 kfree(del_opt);
328 }
329 }
330}
331
332static void __team_options_change_check(struct team *team);
333
334int team_options_register(struct team *team,
335 const struct team_option *option,
336 size_t option_count)
337{
338 int err;
339
340 err = __team_options_register(team, option, option_count);
341 if (err)
342 return err;
343 __team_options_change_check(team);
344 return 0;
345}
346EXPORT_SYMBOL(team_options_register);
347
348void team_options_unregister(struct team *team,
349 const struct team_option *option,
350 size_t option_count)
351{
352 __team_options_mark_removed(team, option, option_count);
353 __team_options_change_check(team);
354 __team_options_unregister(team, option, option_count);
355}
356EXPORT_SYMBOL(team_options_unregister);
357
358static int team_option_get(struct team *team,
359 struct team_option_inst *opt_inst,
360 struct team_gsetter_ctx *ctx)
361{
362 if (!opt_inst->option->getter)
363 return -EOPNOTSUPP;
364 return opt_inst->option->getter(team, ctx);
365}
366
367static int team_option_set(struct team *team,
368 struct team_option_inst *opt_inst,
369 struct team_gsetter_ctx *ctx)
370{
371 if (!opt_inst->option->setter)
372 return -EOPNOTSUPP;
373 return opt_inst->option->setter(team, ctx);
374}
375
376void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info)
377{
378 struct team_option_inst *opt_inst;
379
380 opt_inst = container_of(opt_inst_info, struct team_option_inst, info);
381 opt_inst->changed = true;
382}
383EXPORT_SYMBOL(team_option_inst_set_change);
384
385void team_options_change_check(struct team *team)
386{
387 __team_options_change_check(team);
388}
389EXPORT_SYMBOL(team_options_change_check);
390
391
392/****************
393 * Mode handling
394 ****************/
395
396static LIST_HEAD(mode_list);
397static DEFINE_SPINLOCK(mode_list_lock);
398
399struct team_mode_item {
400 struct list_head list;
401 const struct team_mode *mode;
402};
403
404static struct team_mode_item *__find_mode(const char *kind)
405{
406 struct team_mode_item *mitem;
407
408 list_for_each_entry(mitem, &mode_list, list) {
409 if (strcmp(mitem->mode->kind, kind) == 0)
410 return mitem;
411 }
412 return NULL;
413}
414
415static bool is_good_mode_name(const char *name)
416{
417 while (*name != '\0') {
418 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
419 return false;
420 name++;
421 }
422 return true;
423}
424
425int team_mode_register(const struct team_mode *mode)
426{
427 int err = 0;
428 struct team_mode_item *mitem;
429
430 if (!is_good_mode_name(mode->kind) ||
431 mode->priv_size > TEAM_MODE_PRIV_SIZE)
432 return -EINVAL;
433
434 mitem = kmalloc(sizeof(*mitem), GFP_KERNEL);
435 if (!mitem)
436 return -ENOMEM;
437
438 spin_lock(&mode_list_lock);
439 if (__find_mode(mode->kind)) {
440 err = -EEXIST;
441 kfree(mitem);
442 goto unlock;
443 }
444 mitem->mode = mode;
445 list_add_tail(&mitem->list, &mode_list);
446unlock:
447 spin_unlock(&mode_list_lock);
448 return err;
449}
450EXPORT_SYMBOL(team_mode_register);
451
452void team_mode_unregister(const struct team_mode *mode)
453{
454 struct team_mode_item *mitem;
455
456 spin_lock(&mode_list_lock);
457 mitem = __find_mode(mode->kind);
458 if (mitem) {
459 list_del_init(&mitem->list);
460 kfree(mitem);
461 }
462 spin_unlock(&mode_list_lock);
463}
464EXPORT_SYMBOL(team_mode_unregister);
465
466static const struct team_mode *team_mode_get(const char *kind)
467{
468 struct team_mode_item *mitem;
469 const struct team_mode *mode = NULL;
470
471 spin_lock(&mode_list_lock);
472 mitem = __find_mode(kind);
473 if (!mitem) {
474 spin_unlock(&mode_list_lock);
475 request_module("team-mode-%s", kind);
476 spin_lock(&mode_list_lock);
477 mitem = __find_mode(kind);
478 }
479 if (mitem) {
480 mode = mitem->mode;
481 if (!try_module_get(mode->owner))
482 mode = NULL;
483 }
484
485 spin_unlock(&mode_list_lock);
486 return mode;
487}
488
489static void team_mode_put(const struct team_mode *mode)
490{
491 module_put(mode->owner);
492}
493
494static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
495{
496 dev_kfree_skb_any(skb);
497 return false;
498}
499
500static rx_handler_result_t team_dummy_receive(struct team *team,
501 struct team_port *port,
502 struct sk_buff *skb)
503{
504 return RX_HANDLER_ANOTHER;
505}
506
507static const struct team_mode __team_no_mode = {
508 .kind = "*NOMODE*",
509};
510
511static bool team_is_mode_set(struct team *team)
512{
513 return team->mode != &__team_no_mode;
514}
515
516static void team_set_no_mode(struct team *team)
517{
518 team->user_carrier_enabled = false;
519 team->mode = &__team_no_mode;
520}
521
522static void team_adjust_ops(struct team *team)
523{
524 /*
525 * To avoid checks in rx/tx skb paths, ensure here that non-null and
526 * correct ops are always set.
527 */
528
529 if (!team->en_port_count || !team_is_mode_set(team) ||
530 !team->mode->ops->transmit)
531 team->ops.transmit = team_dummy_transmit;
532 else
533 team->ops.transmit = team->mode->ops->transmit;
534
535 if (!team->en_port_count || !team_is_mode_set(team) ||
536 !team->mode->ops->receive)
537 team->ops.receive = team_dummy_receive;
538 else
539 team->ops.receive = team->mode->ops->receive;
540}
541
542/*
543 * We can benefit from the fact that it's ensured no port is present
544 * at the time of mode change. Therefore no packets are in fly so there's no
545 * need to set mode operations in any special way.
546 */
547static int __team_change_mode(struct team *team,
548 const struct team_mode *new_mode)
549{
550 /* Check if mode was previously set and do cleanup if so */
551 if (team_is_mode_set(team)) {
552 void (*exit_op)(struct team *team) = team->ops.exit;
553
554 /* Clear ops area so no callback is called any longer */
555 memset(&team->ops, 0, sizeof(struct team_mode_ops));
556 team_adjust_ops(team);
557
558 if (exit_op)
559 exit_op(team);
560 team_mode_put(team->mode);
561 team_set_no_mode(team);
562 /* zero private data area */
563 memset(&team->mode_priv, 0,
564 sizeof(struct team) - offsetof(struct team, mode_priv));
565 }
566
567 if (!new_mode)
568 return 0;
569
570 if (new_mode->ops->init) {
571 int err;
572
573 err = new_mode->ops->init(team);
574 if (err)
575 return err;
576 }
577
578 team->mode = new_mode;
579 memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
580 team_adjust_ops(team);
581
582 return 0;
583}
584
585static int team_change_mode(struct team *team, const char *kind)
586{
587 const struct team_mode *new_mode;
588 struct net_device *dev = team->dev;
589 int err;
590
591 if (!list_empty(&team->port_list)) {
592 netdev_err(dev, "No ports can be present during mode change\n");
593 return -EBUSY;
594 }
595
596 if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) {
597 netdev_err(dev, "Unable to change to the same mode the team is in\n");
598 return -EINVAL;
599 }
600
601 new_mode = team_mode_get(kind);
602 if (!new_mode) {
603 netdev_err(dev, "Mode \"%s\" not found\n", kind);
604 return -EINVAL;
605 }
606
607 err = __team_change_mode(team, new_mode);
608 if (err) {
609 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
610 team_mode_put(new_mode);
611 return err;
612 }
613
614 netdev_info(dev, "Mode changed to \"%s\"\n", kind);
615 return 0;
616}
617
618
619/*********************
620 * Peers notification
621 *********************/
622
623static void team_notify_peers_work(struct work_struct *work)
624{
625 struct team *team;
626 int val;
627
628 team = container_of(work, struct team, notify_peers.dw.work);
629
630 if (!rtnl_trylock()) {
631 schedule_delayed_work(&team->notify_peers.dw, 0);
632 return;
633 }
634 val = atomic_dec_if_positive(&team->notify_peers.count_pending);
635 if (val < 0) {
636 rtnl_unlock();
637 return;
638 }
639 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, team->dev);
640 rtnl_unlock();
641 if (val)
642 schedule_delayed_work(&team->notify_peers.dw,
643 msecs_to_jiffies(team->notify_peers.interval));
644}
645
646static void team_notify_peers(struct team *team)
647{
648 if (!team->notify_peers.count || !netif_running(team->dev))
649 return;
650 atomic_add(team->notify_peers.count, &team->notify_peers.count_pending);
651 schedule_delayed_work(&team->notify_peers.dw, 0);
652}
653
654static void team_notify_peers_init(struct team *team)
655{
656 INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work);
657}
658
659static 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
669static void team_mcast_rejoin_work(struct work_struct *work)
670{
671 struct team *team;
672 int val;
673
674 team = container_of(work, struct team, mcast_rejoin.dw.work);
675
676 if (!rtnl_trylock()) {
677 schedule_delayed_work(&team->mcast_rejoin.dw, 0);
678 return;
679 }
680 val = atomic_dec_if_positive(&team->mcast_rejoin.count_pending);
681 if (val < 0) {
682 rtnl_unlock();
683 return;
684 }
685 call_netdevice_notifiers(NETDEV_RESEND_IGMP, team->dev);
686 rtnl_unlock();
687 if (val)
688 schedule_delayed_work(&team->mcast_rejoin.dw,
689 msecs_to_jiffies(team->mcast_rejoin.interval));
690}
691
692static void team_mcast_rejoin(struct team *team)
693{
694 if (!team->mcast_rejoin.count || !netif_running(team->dev))
695 return;
696 atomic_add(team->mcast_rejoin.count, &team->mcast_rejoin.count_pending);
697 schedule_delayed_work(&team->mcast_rejoin.dw, 0);
698}
699
700static void team_mcast_rejoin_init(struct team *team)
701{
702 INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work);
703}
704
705static void team_mcast_rejoin_fini(struct team *team)
706{
707 cancel_delayed_work_sync(&team->mcast_rejoin.dw);
708}
709
710
711/************************
712 * Rx path frame handler
713 ************************/
714
715/* note: already called with rcu_read_lock */
716static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
717{
718 struct sk_buff *skb = *pskb;
719 struct team_port *port;
720 struct team *team;
721 rx_handler_result_t res;
722
723 skb = skb_share_check(skb, GFP_ATOMIC);
724 if (!skb)
725 return RX_HANDLER_CONSUMED;
726
727 *pskb = skb;
728
729 port = team_port_get_rcu(skb->dev);
730 team = port->team;
731 if (!team_port_enabled(port)) {
732 /* allow exact match delivery for disabled ports */
733 res = RX_HANDLER_EXACT;
734 } else {
735 res = team->ops.receive(team, port, skb);
736 }
737 if (res == RX_HANDLER_ANOTHER) {
738 struct team_pcpu_stats *pcpu_stats;
739
740 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
741 u64_stats_update_begin(&pcpu_stats->syncp);
742 pcpu_stats->rx_packets++;
743 pcpu_stats->rx_bytes += skb->len;
744 if (skb->pkt_type == PACKET_MULTICAST)
745 pcpu_stats->rx_multicast++;
746 u64_stats_update_end(&pcpu_stats->syncp);
747
748 skb->dev = team->dev;
749 } else if (res == RX_HANDLER_EXACT) {
750 this_cpu_inc(team->pcpu_stats->rx_nohandler);
751 } else {
752 this_cpu_inc(team->pcpu_stats->rx_dropped);
753 }
754
755 return res;
756}
757
758
759/*************************************
760 * Multiqueue Tx port select override
761 *************************************/
762
763static int team_queue_override_init(struct team *team)
764{
765 struct list_head *listarr;
766 unsigned int queue_cnt = team->dev->num_tx_queues - 1;
767 unsigned int i;
768
769 if (!queue_cnt)
770 return 0;
771 listarr = kmalloc_array(queue_cnt, sizeof(struct list_head),
772 GFP_KERNEL);
773 if (!listarr)
774 return -ENOMEM;
775 team->qom_lists = listarr;
776 for (i = 0; i < queue_cnt; i++)
777 INIT_LIST_HEAD(listarr++);
778 return 0;
779}
780
781static void team_queue_override_fini(struct team *team)
782{
783 kfree(team->qom_lists);
784}
785
786static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
787{
788 return &team->qom_lists[queue_id - 1];
789}
790
791/*
792 * note: already called with rcu_read_lock
793 */
794static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
795{
796 struct list_head *qom_list;
797 struct team_port *port;
798
799 if (!team->queue_override_enabled || !skb->queue_mapping)
800 return false;
801 qom_list = __team_get_qom_list(team, skb->queue_mapping);
802 list_for_each_entry_rcu(port, qom_list, qom_list) {
803 if (!team_dev_queue_xmit(team, port, skb))
804 return true;
805 }
806 return false;
807}
808
809static void __team_queue_override_port_del(struct team *team,
810 struct team_port *port)
811{
812 if (!port->queue_id)
813 return;
814 list_del_rcu(&port->qom_list);
815}
816
817static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
818 struct team_port *cur)
819{
820 if (port->priority < cur->priority)
821 return true;
822 if (port->priority > cur->priority)
823 return false;
824 if (port->index < cur->index)
825 return true;
826 return false;
827}
828
829static void __team_queue_override_port_add(struct team *team,
830 struct team_port *port)
831{
832 struct team_port *cur;
833 struct list_head *qom_list;
834 struct list_head *node;
835
836 if (!port->queue_id)
837 return;
838 qom_list = __team_get_qom_list(team, port->queue_id);
839 node = qom_list;
840 list_for_each_entry(cur, qom_list, qom_list) {
841 if (team_queue_override_port_has_gt_prio_than(port, cur))
842 break;
843 node = &cur->qom_list;
844 }
845 list_add_tail_rcu(&port->qom_list, node);
846}
847
848static void __team_queue_override_enabled_check(struct team *team)
849{
850 struct team_port *port;
851 bool enabled = false;
852
853 list_for_each_entry(port, &team->port_list, list) {
854 if (port->queue_id) {
855 enabled = true;
856 break;
857 }
858 }
859 if (enabled == team->queue_override_enabled)
860 return;
861 netdev_dbg(team->dev, "%s queue override\n",
862 enabled ? "Enabling" : "Disabling");
863 team->queue_override_enabled = enabled;
864}
865
866static void team_queue_override_port_prio_changed(struct team *team,
867 struct team_port *port)
868{
869 if (!port->queue_id || team_port_enabled(port))
870 return;
871 __team_queue_override_port_del(team, port);
872 __team_queue_override_port_add(team, port);
873 __team_queue_override_enabled_check(team);
874}
875
876static void team_queue_override_port_change_queue_id(struct team *team,
877 struct team_port *port,
878 u16 new_queue_id)
879{
880 if (team_port_enabled(port)) {
881 __team_queue_override_port_del(team, port);
882 port->queue_id = new_queue_id;
883 __team_queue_override_port_add(team, port);
884 __team_queue_override_enabled_check(team);
885 } else {
886 port->queue_id = new_queue_id;
887 }
888}
889
890static void team_queue_override_port_add(struct team *team,
891 struct team_port *port)
892{
893 __team_queue_override_port_add(team, port);
894 __team_queue_override_enabled_check(team);
895}
896
897static void team_queue_override_port_del(struct team *team,
898 struct team_port *port)
899{
900 __team_queue_override_port_del(team, port);
901 __team_queue_override_enabled_check(team);
902}
903
904
905/****************
906 * Port handling
907 ****************/
908
909static bool team_port_find(const struct team *team,
910 const struct team_port *port)
911{
912 struct team_port *cur;
913
914 list_for_each_entry(cur, &team->port_list, list)
915 if (cur == port)
916 return true;
917 return false;
918}
919
920/*
921 * Enable/disable port by adding to enabled port hashlist and setting
922 * port->index (Might be racy so reader could see incorrect ifindex when
923 * processing a flying packet, but that is not a problem). Write guarded
924 * by team->lock.
925 */
926static void team_port_enable(struct team *team,
927 struct team_port *port)
928{
929 if (team_port_enabled(port))
930 return;
931 port->index = team->en_port_count++;
932 hlist_add_head_rcu(&port->hlist,
933 team_port_index_hash(team, port->index));
934 team_adjust_ops(team);
935 team_queue_override_port_add(team, port);
936 if (team->ops.port_enabled)
937 team->ops.port_enabled(team, port);
938 team_notify_peers(team);
939 team_mcast_rejoin(team);
940 team_lower_state_changed(port);
941}
942
943static void __reconstruct_port_hlist(struct team *team, int rm_index)
944{
945 int i;
946 struct team_port *port;
947
948 for (i = rm_index + 1; i < team->en_port_count; i++) {
949 port = team_get_port_by_index(team, i);
950 hlist_del_rcu(&port->hlist);
951 port->index--;
952 hlist_add_head_rcu(&port->hlist,
953 team_port_index_hash(team, port->index));
954 }
955}
956
957static void team_port_disable(struct team *team,
958 struct team_port *port)
959{
960 if (!team_port_enabled(port))
961 return;
962 if (team->ops.port_disabled)
963 team->ops.port_disabled(team, port);
964 hlist_del_rcu(&port->hlist);
965 __reconstruct_port_hlist(team, port->index);
966 port->index = -1;
967 team->en_port_count--;
968 team_queue_override_port_del(team, port);
969 team_adjust_ops(team);
970 team_lower_state_changed(port);
971}
972
973#define TEAM_VLAN_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
974 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
975 NETIF_F_HIGHDMA | NETIF_F_LRO)
976
977#define TEAM_ENC_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
978 NETIF_F_RXCSUM | NETIF_F_ALL_TSO)
979
980static void __team_compute_features(struct team *team)
981{
982 struct team_port *port;
983 netdev_features_t vlan_features = TEAM_VLAN_FEATURES &
984 NETIF_F_ALL_FOR_ALL;
985 netdev_features_t enc_features = TEAM_ENC_FEATURES;
986 unsigned short max_hard_header_len = ETH_HLEN;
987 unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE |
988 IFF_XMIT_DST_RELEASE_PERM;
989
990 list_for_each_entry(port, &team->port_list, list) {
991 vlan_features = netdev_increment_features(vlan_features,
992 port->dev->vlan_features,
993 TEAM_VLAN_FEATURES);
994 enc_features =
995 netdev_increment_features(enc_features,
996 port->dev->hw_enc_features,
997 TEAM_ENC_FEATURES);
998
999
1000 dst_release_flag &= port->dev->priv_flags;
1001 if (port->dev->hard_header_len > max_hard_header_len)
1002 max_hard_header_len = port->dev->hard_header_len;
1003 }
1004
1005 team->dev->vlan_features = vlan_features;
1006 team->dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL |
1007 NETIF_F_HW_VLAN_CTAG_TX |
1008 NETIF_F_HW_VLAN_STAG_TX |
1009 NETIF_F_GSO_UDP_L4;
1010 team->dev->hard_header_len = max_hard_header_len;
1011
1012 team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
1013 if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
1014 team->dev->priv_flags |= IFF_XMIT_DST_RELEASE;
1015}
1016
1017static void team_compute_features(struct team *team)
1018{
1019 mutex_lock(&team->lock);
1020 __team_compute_features(team);
1021 mutex_unlock(&team->lock);
1022 netdev_change_features(team->dev);
1023}
1024
1025static int team_port_enter(struct team *team, struct team_port *port)
1026{
1027 int err = 0;
1028
1029 dev_hold(team->dev);
1030 if (team->ops.port_enter) {
1031 err = team->ops.port_enter(team, port);
1032 if (err) {
1033 netdev_err(team->dev, "Device %s failed to enter team mode\n",
1034 port->dev->name);
1035 goto err_port_enter;
1036 }
1037 }
1038
1039 return 0;
1040
1041err_port_enter:
1042 dev_put(team->dev);
1043
1044 return err;
1045}
1046
1047static void team_port_leave(struct team *team, struct team_port *port)
1048{
1049 if (team->ops.port_leave)
1050 team->ops.port_leave(team, port);
1051 dev_put(team->dev);
1052}
1053
1054#ifdef CONFIG_NET_POLL_CONTROLLER
1055static int __team_port_enable_netpoll(struct team_port *port)
1056{
1057 struct netpoll *np;
1058 int err;
1059
1060 np = kzalloc(sizeof(*np), GFP_KERNEL);
1061 if (!np)
1062 return -ENOMEM;
1063
1064 err = __netpoll_setup(np, port->dev);
1065 if (err) {
1066 kfree(np);
1067 return err;
1068 }
1069 port->np = np;
1070 return err;
1071}
1072
1073static int team_port_enable_netpoll(struct team_port *port)
1074{
1075 if (!port->team->dev->npinfo)
1076 return 0;
1077
1078 return __team_port_enable_netpoll(port);
1079}
1080
1081static void team_port_disable_netpoll(struct team_port *port)
1082{
1083 struct netpoll *np = port->np;
1084
1085 if (!np)
1086 return;
1087 port->np = NULL;
1088
1089 __netpoll_free(np);
1090}
1091#else
1092static int team_port_enable_netpoll(struct team_port *port)
1093{
1094 return 0;
1095}
1096static void team_port_disable_netpoll(struct team_port *port)
1097{
1098}
1099#endif
1100
1101static int team_upper_dev_link(struct team *team, struct team_port *port,
1102 struct netlink_ext_ack *extack)
1103{
1104 struct netdev_lag_upper_info lag_upper_info;
1105 int err;
1106
1107 lag_upper_info.tx_type = team->mode->lag_tx_type;
1108 lag_upper_info.hash_type = NETDEV_LAG_HASH_UNKNOWN;
1109 err = netdev_master_upper_dev_link(port->dev, team->dev, NULL,
1110 &lag_upper_info, extack);
1111 if (err)
1112 return err;
1113 port->dev->priv_flags |= IFF_TEAM_PORT;
1114 return 0;
1115}
1116
1117static void team_upper_dev_unlink(struct team *team, struct team_port *port)
1118{
1119 netdev_upper_dev_unlink(port->dev, team->dev);
1120 port->dev->priv_flags &= ~IFF_TEAM_PORT;
1121}
1122
1123static void __team_port_change_port_added(struct team_port *port, bool linkup);
1124static int team_dev_type_check_change(struct net_device *dev,
1125 struct net_device *port_dev);
1126
1127static int team_port_add(struct team *team, struct net_device *port_dev,
1128 struct netlink_ext_ack *extack)
1129{
1130 struct net_device *dev = team->dev;
1131 struct team_port *port;
1132 char *portname = port_dev->name;
1133 int err;
1134
1135 if (port_dev->flags & IFF_LOOPBACK) {
1136 NL_SET_ERR_MSG(extack, "Loopback device can't be added as a team port");
1137 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1138 portname);
1139 return -EINVAL;
1140 }
1141
1142 if (netif_is_team_port(port_dev)) {
1143 NL_SET_ERR_MSG(extack, "Device is already a port of a team device");
1144 netdev_err(dev, "Device %s is already a port "
1145 "of a team device\n", portname);
1146 return -EBUSY;
1147 }
1148
1149 if (dev == port_dev) {
1150 NL_SET_ERR_MSG(extack, "Cannot enslave team device to itself");
1151 netdev_err(dev, "Cannot enslave team device to itself\n");
1152 return -EINVAL;
1153 }
1154
1155 if (netdev_has_upper_dev(dev, port_dev)) {
1156 NL_SET_ERR_MSG(extack, "Device is already an upper device of the team interface");
1157 netdev_err(dev, "Device %s is already an upper device of the team interface\n",
1158 portname);
1159 return -EBUSY;
1160 }
1161
1162 if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1163 vlan_uses_dev(dev)) {
1164 NL_SET_ERR_MSG(extack, "Device is VLAN challenged and team device has VLAN set up");
1165 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1166 portname);
1167 return -EPERM;
1168 }
1169
1170 err = team_dev_type_check_change(dev, port_dev);
1171 if (err)
1172 return err;
1173
1174 if (port_dev->flags & IFF_UP) {
1175 NL_SET_ERR_MSG(extack, "Device is up. Set it down before adding it as a team port");
1176 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1177 portname);
1178 return -EBUSY;
1179 }
1180
1181 port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1182 GFP_KERNEL);
1183 if (!port)
1184 return -ENOMEM;
1185
1186 port->dev = port_dev;
1187 port->team = team;
1188 INIT_LIST_HEAD(&port->qom_list);
1189
1190 port->orig.mtu = port_dev->mtu;
1191 err = dev_set_mtu(port_dev, dev->mtu);
1192 if (err) {
1193 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1194 goto err_set_mtu;
1195 }
1196
1197 memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1198
1199 err = team_port_enter(team, port);
1200 if (err) {
1201 netdev_err(dev, "Device %s failed to enter team mode\n",
1202 portname);
1203 goto err_port_enter;
1204 }
1205
1206 err = dev_open(port_dev, extack);
1207 if (err) {
1208 netdev_dbg(dev, "Device %s opening failed\n",
1209 portname);
1210 goto err_dev_open;
1211 }
1212
1213 err = vlan_vids_add_by_dev(port_dev, dev);
1214 if (err) {
1215 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1216 portname);
1217 goto err_vids_add;
1218 }
1219
1220 err = team_port_enable_netpoll(port);
1221 if (err) {
1222 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1223 portname);
1224 goto err_enable_netpoll;
1225 }
1226
1227 if (!(dev->features & NETIF_F_LRO))
1228 dev_disable_lro(port_dev);
1229
1230 err = netdev_rx_handler_register(port_dev, team_handle_frame,
1231 port);
1232 if (err) {
1233 netdev_err(dev, "Device %s failed to register rx_handler\n",
1234 portname);
1235 goto err_handler_register;
1236 }
1237
1238 err = team_upper_dev_link(team, port, extack);
1239 if (err) {
1240 netdev_err(dev, "Device %s failed to set upper link\n",
1241 portname);
1242 goto err_set_upper_link;
1243 }
1244
1245 err = __team_option_inst_add_port(team, port);
1246 if (err) {
1247 netdev_err(dev, "Device %s failed to add per-port options\n",
1248 portname);
1249 goto err_option_port_add;
1250 }
1251
1252 /* set promiscuity level to new slave */
1253 if (dev->flags & IFF_PROMISC) {
1254 err = dev_set_promiscuity(port_dev, 1);
1255 if (err)
1256 goto err_set_slave_promisc;
1257 }
1258
1259 /* set allmulti level to new slave */
1260 if (dev->flags & IFF_ALLMULTI) {
1261 err = dev_set_allmulti(port_dev, 1);
1262 if (err) {
1263 if (dev->flags & IFF_PROMISC)
1264 dev_set_promiscuity(port_dev, -1);
1265 goto err_set_slave_promisc;
1266 }
1267 }
1268
1269 netif_addr_lock_bh(dev);
1270 dev_uc_sync_multiple(port_dev, dev);
1271 dev_mc_sync_multiple(port_dev, dev);
1272 netif_addr_unlock_bh(dev);
1273
1274 port->index = -1;
1275 list_add_tail_rcu(&port->list, &team->port_list);
1276 team_port_enable(team, port);
1277 __team_compute_features(team);
1278 __team_port_change_port_added(port, !!netif_oper_up(port_dev));
1279 __team_options_change_check(team);
1280
1281 netdev_info(dev, "Port device %s added\n", portname);
1282
1283 return 0;
1284
1285err_set_slave_promisc:
1286 __team_option_inst_del_port(team, port);
1287
1288err_option_port_add:
1289 team_upper_dev_unlink(team, port);
1290
1291err_set_upper_link:
1292 netdev_rx_handler_unregister(port_dev);
1293
1294err_handler_register:
1295 team_port_disable_netpoll(port);
1296
1297err_enable_netpoll:
1298 vlan_vids_del_by_dev(port_dev, dev);
1299
1300err_vids_add:
1301 dev_close(port_dev);
1302
1303err_dev_open:
1304 team_port_leave(team, port);
1305 team_port_set_orig_dev_addr(port);
1306
1307err_port_enter:
1308 dev_set_mtu(port_dev, port->orig.mtu);
1309
1310err_set_mtu:
1311 kfree(port);
1312
1313 return err;
1314}
1315
1316static void __team_port_change_port_removed(struct team_port *port);
1317
1318static int team_port_del(struct team *team, struct net_device *port_dev)
1319{
1320 struct net_device *dev = team->dev;
1321 struct team_port *port;
1322 char *portname = port_dev->name;
1323
1324 port = team_port_get_rtnl(port_dev);
1325 if (!port || !team_port_find(team, port)) {
1326 netdev_err(dev, "Device %s does not act as a port of this team\n",
1327 portname);
1328 return -ENOENT;
1329 }
1330
1331 team_port_disable(team, port);
1332 list_del_rcu(&port->list);
1333
1334 if (dev->flags & IFF_PROMISC)
1335 dev_set_promiscuity(port_dev, -1);
1336 if (dev->flags & IFF_ALLMULTI)
1337 dev_set_allmulti(port_dev, -1);
1338
1339 team_upper_dev_unlink(team, port);
1340 netdev_rx_handler_unregister(port_dev);
1341 team_port_disable_netpoll(port);
1342 vlan_vids_del_by_dev(port_dev, dev);
1343 dev_uc_unsync(port_dev, dev);
1344 dev_mc_unsync(port_dev, dev);
1345 dev_close(port_dev);
1346 team_port_leave(team, port);
1347
1348 __team_option_inst_mark_removed_port(team, port);
1349 __team_options_change_check(team);
1350 __team_option_inst_del_port(team, port);
1351 __team_port_change_port_removed(port);
1352
1353 team_port_set_orig_dev_addr(port);
1354 dev_set_mtu(port_dev, port->orig.mtu);
1355 kfree_rcu(port, rcu);
1356 netdev_info(dev, "Port device %s removed\n", portname);
1357 __team_compute_features(team);
1358
1359 return 0;
1360}
1361
1362
1363/*****************
1364 * Net device ops
1365 *****************/
1366
1367static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1368{
1369 ctx->data.str_val = team->mode->kind;
1370 return 0;
1371}
1372
1373static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1374{
1375 return team_change_mode(team, ctx->data.str_val);
1376}
1377
1378static int team_notify_peers_count_get(struct team *team,
1379 struct team_gsetter_ctx *ctx)
1380{
1381 ctx->data.u32_val = team->notify_peers.count;
1382 return 0;
1383}
1384
1385static int team_notify_peers_count_set(struct team *team,
1386 struct team_gsetter_ctx *ctx)
1387{
1388 team->notify_peers.count = ctx->data.u32_val;
1389 return 0;
1390}
1391
1392static int team_notify_peers_interval_get(struct team *team,
1393 struct team_gsetter_ctx *ctx)
1394{
1395 ctx->data.u32_val = team->notify_peers.interval;
1396 return 0;
1397}
1398
1399static int team_notify_peers_interval_set(struct team *team,
1400 struct team_gsetter_ctx *ctx)
1401{
1402 team->notify_peers.interval = ctx->data.u32_val;
1403 return 0;
1404}
1405
1406static int team_mcast_rejoin_count_get(struct team *team,
1407 struct team_gsetter_ctx *ctx)
1408{
1409 ctx->data.u32_val = team->mcast_rejoin.count;
1410 return 0;
1411}
1412
1413static int team_mcast_rejoin_count_set(struct team *team,
1414 struct team_gsetter_ctx *ctx)
1415{
1416 team->mcast_rejoin.count = ctx->data.u32_val;
1417 return 0;
1418}
1419
1420static int team_mcast_rejoin_interval_get(struct team *team,
1421 struct team_gsetter_ctx *ctx)
1422{
1423 ctx->data.u32_val = team->mcast_rejoin.interval;
1424 return 0;
1425}
1426
1427static int team_mcast_rejoin_interval_set(struct team *team,
1428 struct team_gsetter_ctx *ctx)
1429{
1430 team->mcast_rejoin.interval = ctx->data.u32_val;
1431 return 0;
1432}
1433
1434static int team_port_en_option_get(struct team *team,
1435 struct team_gsetter_ctx *ctx)
1436{
1437 struct team_port *port = ctx->info->port;
1438
1439 ctx->data.bool_val = team_port_enabled(port);
1440 return 0;
1441}
1442
1443static int team_port_en_option_set(struct team *team,
1444 struct team_gsetter_ctx *ctx)
1445{
1446 struct team_port *port = ctx->info->port;
1447
1448 if (ctx->data.bool_val)
1449 team_port_enable(team, port);
1450 else
1451 team_port_disable(team, port);
1452 return 0;
1453}
1454
1455static int team_user_linkup_option_get(struct team *team,
1456 struct team_gsetter_ctx *ctx)
1457{
1458 struct team_port *port = ctx->info->port;
1459
1460 ctx->data.bool_val = port->user.linkup;
1461 return 0;
1462}
1463
1464static void __team_carrier_check(struct team *team);
1465
1466static int team_user_linkup_option_set(struct team *team,
1467 struct team_gsetter_ctx *ctx)
1468{
1469 struct team_port *port = ctx->info->port;
1470
1471 port->user.linkup = ctx->data.bool_val;
1472 team_refresh_port_linkup(port);
1473 __team_carrier_check(port->team);
1474 return 0;
1475}
1476
1477static int team_user_linkup_en_option_get(struct team *team,
1478 struct team_gsetter_ctx *ctx)
1479{
1480 struct team_port *port = ctx->info->port;
1481
1482 ctx->data.bool_val = port->user.linkup_enabled;
1483 return 0;
1484}
1485
1486static int team_user_linkup_en_option_set(struct team *team,
1487 struct team_gsetter_ctx *ctx)
1488{
1489 struct team_port *port = ctx->info->port;
1490
1491 port->user.linkup_enabled = ctx->data.bool_val;
1492 team_refresh_port_linkup(port);
1493 __team_carrier_check(port->team);
1494 return 0;
1495}
1496
1497static int team_priority_option_get(struct team *team,
1498 struct team_gsetter_ctx *ctx)
1499{
1500 struct team_port *port = ctx->info->port;
1501
1502 ctx->data.s32_val = port->priority;
1503 return 0;
1504}
1505
1506static int team_priority_option_set(struct team *team,
1507 struct team_gsetter_ctx *ctx)
1508{
1509 struct team_port *port = ctx->info->port;
1510 s32 priority = ctx->data.s32_val;
1511
1512 if (port->priority == priority)
1513 return 0;
1514 port->priority = priority;
1515 team_queue_override_port_prio_changed(team, port);
1516 return 0;
1517}
1518
1519static int team_queue_id_option_get(struct team *team,
1520 struct team_gsetter_ctx *ctx)
1521{
1522 struct team_port *port = ctx->info->port;
1523
1524 ctx->data.u32_val = port->queue_id;
1525 return 0;
1526}
1527
1528static int team_queue_id_option_set(struct team *team,
1529 struct team_gsetter_ctx *ctx)
1530{
1531 struct team_port *port = ctx->info->port;
1532 u16 new_queue_id = ctx->data.u32_val;
1533
1534 if (port->queue_id == new_queue_id)
1535 return 0;
1536 if (new_queue_id >= team->dev->real_num_tx_queues)
1537 return -EINVAL;
1538 team_queue_override_port_change_queue_id(team, port, new_queue_id);
1539 return 0;
1540}
1541
1542static const struct team_option team_options[] = {
1543 {
1544 .name = "mode",
1545 .type = TEAM_OPTION_TYPE_STRING,
1546 .getter = team_mode_option_get,
1547 .setter = team_mode_option_set,
1548 },
1549 {
1550 .name = "notify_peers_count",
1551 .type = TEAM_OPTION_TYPE_U32,
1552 .getter = team_notify_peers_count_get,
1553 .setter = team_notify_peers_count_set,
1554 },
1555 {
1556 .name = "notify_peers_interval",
1557 .type = TEAM_OPTION_TYPE_U32,
1558 .getter = team_notify_peers_interval_get,
1559 .setter = team_notify_peers_interval_set,
1560 },
1561 {
1562 .name = "mcast_rejoin_count",
1563 .type = TEAM_OPTION_TYPE_U32,
1564 .getter = team_mcast_rejoin_count_get,
1565 .setter = team_mcast_rejoin_count_set,
1566 },
1567 {
1568 .name = "mcast_rejoin_interval",
1569 .type = TEAM_OPTION_TYPE_U32,
1570 .getter = team_mcast_rejoin_interval_get,
1571 .setter = team_mcast_rejoin_interval_set,
1572 },
1573 {
1574 .name = "enabled",
1575 .type = TEAM_OPTION_TYPE_BOOL,
1576 .per_port = true,
1577 .getter = team_port_en_option_get,
1578 .setter = team_port_en_option_set,
1579 },
1580 {
1581 .name = "user_linkup",
1582 .type = TEAM_OPTION_TYPE_BOOL,
1583 .per_port = true,
1584 .getter = team_user_linkup_option_get,
1585 .setter = team_user_linkup_option_set,
1586 },
1587 {
1588 .name = "user_linkup_enabled",
1589 .type = TEAM_OPTION_TYPE_BOOL,
1590 .per_port = true,
1591 .getter = team_user_linkup_en_option_get,
1592 .setter = team_user_linkup_en_option_set,
1593 },
1594 {
1595 .name = "priority",
1596 .type = TEAM_OPTION_TYPE_S32,
1597 .per_port = true,
1598 .getter = team_priority_option_get,
1599 .setter = team_priority_option_set,
1600 },
1601 {
1602 .name = "queue_id",
1603 .type = TEAM_OPTION_TYPE_U32,
1604 .per_port = true,
1605 .getter = team_queue_id_option_get,
1606 .setter = team_queue_id_option_set,
1607 },
1608};
1609
1610
1611static int team_init(struct net_device *dev)
1612{
1613 struct team *team = netdev_priv(dev);
1614 int i;
1615 int err;
1616
1617 team->dev = dev;
1618 team_set_no_mode(team);
1619
1620 team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1621 if (!team->pcpu_stats)
1622 return -ENOMEM;
1623
1624 for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1625 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1626 INIT_LIST_HEAD(&team->port_list);
1627 err = team_queue_override_init(team);
1628 if (err)
1629 goto err_team_queue_override_init;
1630
1631 team_adjust_ops(team);
1632
1633 INIT_LIST_HEAD(&team->option_list);
1634 INIT_LIST_HEAD(&team->option_inst_list);
1635
1636 team_notify_peers_init(team);
1637 team_mcast_rejoin_init(team);
1638
1639 err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1640 if (err)
1641 goto err_options_register;
1642 netif_carrier_off(dev);
1643
1644 lockdep_register_key(&team->team_lock_key);
1645 __mutex_init(&team->lock, "team->team_lock_key", &team->team_lock_key);
1646
1647 return 0;
1648
1649err_options_register:
1650 team_mcast_rejoin_fini(team);
1651 team_notify_peers_fini(team);
1652 team_queue_override_fini(team);
1653err_team_queue_override_init:
1654 free_percpu(team->pcpu_stats);
1655
1656 return err;
1657}
1658
1659static void team_uninit(struct net_device *dev)
1660{
1661 struct team *team = netdev_priv(dev);
1662 struct team_port *port;
1663 struct team_port *tmp;
1664
1665 mutex_lock(&team->lock);
1666 list_for_each_entry_safe(port, tmp, &team->port_list, list)
1667 team_port_del(team, port->dev);
1668
1669 __team_change_mode(team, NULL); /* cleanup */
1670 __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1671 team_mcast_rejoin_fini(team);
1672 team_notify_peers_fini(team);
1673 team_queue_override_fini(team);
1674 mutex_unlock(&team->lock);
1675 netdev_change_features(dev);
1676 lockdep_unregister_key(&team->team_lock_key);
1677}
1678
1679static void team_destructor(struct net_device *dev)
1680{
1681 struct team *team = netdev_priv(dev);
1682
1683 free_percpu(team->pcpu_stats);
1684}
1685
1686static int team_open(struct net_device *dev)
1687{
1688 return 0;
1689}
1690
1691static int team_close(struct net_device *dev)
1692{
1693 return 0;
1694}
1695
1696/*
1697 * note: already called with rcu_read_lock
1698 */
1699static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1700{
1701 struct team *team = netdev_priv(dev);
1702 bool tx_success;
1703 unsigned int len = skb->len;
1704
1705 tx_success = team_queue_override_transmit(team, skb);
1706 if (!tx_success)
1707 tx_success = team->ops.transmit(team, skb);
1708 if (tx_success) {
1709 struct team_pcpu_stats *pcpu_stats;
1710
1711 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1712 u64_stats_update_begin(&pcpu_stats->syncp);
1713 pcpu_stats->tx_packets++;
1714 pcpu_stats->tx_bytes += len;
1715 u64_stats_update_end(&pcpu_stats->syncp);
1716 } else {
1717 this_cpu_inc(team->pcpu_stats->tx_dropped);
1718 }
1719
1720 return NETDEV_TX_OK;
1721}
1722
1723static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1724 struct net_device *sb_dev)
1725{
1726 /*
1727 * This helper function exists to help dev_pick_tx get the correct
1728 * destination queue. Using a helper function skips a call to
1729 * skb_tx_hash and will put the skbs in the queue we expect on their
1730 * way down to the team driver.
1731 */
1732 u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1733
1734 /*
1735 * Save the original txq to restore before passing to the driver
1736 */
1737 qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1738
1739 if (unlikely(txq >= dev->real_num_tx_queues)) {
1740 do {
1741 txq -= dev->real_num_tx_queues;
1742 } while (txq >= dev->real_num_tx_queues);
1743 }
1744 return txq;
1745}
1746
1747static void team_change_rx_flags(struct net_device *dev, int change)
1748{
1749 struct team *team = netdev_priv(dev);
1750 struct team_port *port;
1751 int inc;
1752
1753 rcu_read_lock();
1754 list_for_each_entry_rcu(port, &team->port_list, list) {
1755 if (change & IFF_PROMISC) {
1756 inc = dev->flags & IFF_PROMISC ? 1 : -1;
1757 dev_set_promiscuity(port->dev, inc);
1758 }
1759 if (change & IFF_ALLMULTI) {
1760 inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1761 dev_set_allmulti(port->dev, inc);
1762 }
1763 }
1764 rcu_read_unlock();
1765}
1766
1767static void team_set_rx_mode(struct net_device *dev)
1768{
1769 struct team *team = netdev_priv(dev);
1770 struct team_port *port;
1771
1772 rcu_read_lock();
1773 list_for_each_entry_rcu(port, &team->port_list, list) {
1774 dev_uc_sync_multiple(port->dev, dev);
1775 dev_mc_sync_multiple(port->dev, dev);
1776 }
1777 rcu_read_unlock();
1778}
1779
1780static int team_set_mac_address(struct net_device *dev, void *p)
1781{
1782 struct sockaddr *addr = p;
1783 struct team *team = netdev_priv(dev);
1784 struct team_port *port;
1785
1786 if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1787 return -EADDRNOTAVAIL;
1788 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1789 mutex_lock(&team->lock);
1790 list_for_each_entry(port, &team->port_list, list)
1791 if (team->ops.port_change_dev_addr)
1792 team->ops.port_change_dev_addr(team, port);
1793 mutex_unlock(&team->lock);
1794 return 0;
1795}
1796
1797static int team_change_mtu(struct net_device *dev, int new_mtu)
1798{
1799 struct team *team = netdev_priv(dev);
1800 struct team_port *port;
1801 int err;
1802
1803 /*
1804 * Alhough this is reader, it's guarded by team lock. It's not possible
1805 * to traverse list in reverse under rcu_read_lock
1806 */
1807 mutex_lock(&team->lock);
1808 team->port_mtu_change_allowed = true;
1809 list_for_each_entry(port, &team->port_list, list) {
1810 err = dev_set_mtu(port->dev, new_mtu);
1811 if (err) {
1812 netdev_err(dev, "Device %s failed to change mtu",
1813 port->dev->name);
1814 goto unwind;
1815 }
1816 }
1817 team->port_mtu_change_allowed = false;
1818 mutex_unlock(&team->lock);
1819
1820 dev->mtu = new_mtu;
1821
1822 return 0;
1823
1824unwind:
1825 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1826 dev_set_mtu(port->dev, dev->mtu);
1827 team->port_mtu_change_allowed = false;
1828 mutex_unlock(&team->lock);
1829
1830 return err;
1831}
1832
1833static void
1834team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1835{
1836 struct team *team = netdev_priv(dev);
1837 struct team_pcpu_stats *p;
1838 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1839 u32 rx_dropped = 0, tx_dropped = 0, rx_nohandler = 0;
1840 unsigned int start;
1841 int i;
1842
1843 for_each_possible_cpu(i) {
1844 p = per_cpu_ptr(team->pcpu_stats, i);
1845 do {
1846 start = u64_stats_fetch_begin_irq(&p->syncp);
1847 rx_packets = p->rx_packets;
1848 rx_bytes = p->rx_bytes;
1849 rx_multicast = p->rx_multicast;
1850 tx_packets = p->tx_packets;
1851 tx_bytes = p->tx_bytes;
1852 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
1853
1854 stats->rx_packets += rx_packets;
1855 stats->rx_bytes += rx_bytes;
1856 stats->multicast += rx_multicast;
1857 stats->tx_packets += tx_packets;
1858 stats->tx_bytes += tx_bytes;
1859 /*
1860 * rx_dropped, tx_dropped & rx_nohandler are u32,
1861 * updated without syncp protection.
1862 */
1863 rx_dropped += p->rx_dropped;
1864 tx_dropped += p->tx_dropped;
1865 rx_nohandler += p->rx_nohandler;
1866 }
1867 stats->rx_dropped = rx_dropped;
1868 stats->tx_dropped = tx_dropped;
1869 stats->rx_nohandler = rx_nohandler;
1870}
1871
1872static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1873{
1874 struct team *team = netdev_priv(dev);
1875 struct team_port *port;
1876 int err;
1877
1878 /*
1879 * Alhough this is reader, it's guarded by team lock. It's not possible
1880 * to traverse list in reverse under rcu_read_lock
1881 */
1882 mutex_lock(&team->lock);
1883 list_for_each_entry(port, &team->port_list, list) {
1884 err = vlan_vid_add(port->dev, proto, vid);
1885 if (err)
1886 goto unwind;
1887 }
1888 mutex_unlock(&team->lock);
1889
1890 return 0;
1891
1892unwind:
1893 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1894 vlan_vid_del(port->dev, proto, vid);
1895 mutex_unlock(&team->lock);
1896
1897 return err;
1898}
1899
1900static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1901{
1902 struct team *team = netdev_priv(dev);
1903 struct team_port *port;
1904
1905 mutex_lock(&team->lock);
1906 list_for_each_entry(port, &team->port_list, list)
1907 vlan_vid_del(port->dev, proto, vid);
1908 mutex_unlock(&team->lock);
1909
1910 return 0;
1911}
1912
1913#ifdef CONFIG_NET_POLL_CONTROLLER
1914static void team_poll_controller(struct net_device *dev)
1915{
1916}
1917
1918static void __team_netpoll_cleanup(struct team *team)
1919{
1920 struct team_port *port;
1921
1922 list_for_each_entry(port, &team->port_list, list)
1923 team_port_disable_netpoll(port);
1924}
1925
1926static void team_netpoll_cleanup(struct net_device *dev)
1927{
1928 struct team *team = netdev_priv(dev);
1929
1930 mutex_lock(&team->lock);
1931 __team_netpoll_cleanup(team);
1932 mutex_unlock(&team->lock);
1933}
1934
1935static int team_netpoll_setup(struct net_device *dev,
1936 struct netpoll_info *npifo)
1937{
1938 struct team *team = netdev_priv(dev);
1939 struct team_port *port;
1940 int err = 0;
1941
1942 mutex_lock(&team->lock);
1943 list_for_each_entry(port, &team->port_list, list) {
1944 err = __team_port_enable_netpoll(port);
1945 if (err) {
1946 __team_netpoll_cleanup(team);
1947 break;
1948 }
1949 }
1950 mutex_unlock(&team->lock);
1951 return err;
1952}
1953#endif
1954
1955static int team_add_slave(struct net_device *dev, struct net_device *port_dev,
1956 struct netlink_ext_ack *extack)
1957{
1958 struct team *team = netdev_priv(dev);
1959 int err;
1960
1961 mutex_lock(&team->lock);
1962 err = team_port_add(team, port_dev, extack);
1963 mutex_unlock(&team->lock);
1964
1965 if (!err)
1966 netdev_change_features(dev);
1967
1968 return err;
1969}
1970
1971static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1972{
1973 struct team *team = netdev_priv(dev);
1974 int err;
1975
1976 mutex_lock(&team->lock);
1977 err = team_port_del(team, port_dev);
1978 mutex_unlock(&team->lock);
1979
1980 if (err)
1981 return err;
1982
1983 if (netif_is_team_master(port_dev)) {
1984 lockdep_unregister_key(&team->team_lock_key);
1985 lockdep_register_key(&team->team_lock_key);
1986 lockdep_set_class(&team->lock, &team->team_lock_key);
1987 }
1988 netdev_change_features(dev);
1989
1990 return err;
1991}
1992
1993static netdev_features_t team_fix_features(struct net_device *dev,
1994 netdev_features_t features)
1995{
1996 struct team_port *port;
1997 struct team *team = netdev_priv(dev);
1998 netdev_features_t mask;
1999
2000 mask = features;
2001 features &= ~NETIF_F_ONE_FOR_ALL;
2002 features |= NETIF_F_ALL_FOR_ALL;
2003
2004 rcu_read_lock();
2005 list_for_each_entry_rcu(port, &team->port_list, list) {
2006 features = netdev_increment_features(features,
2007 port->dev->features,
2008 mask);
2009 }
2010 rcu_read_unlock();
2011
2012 features = netdev_add_tso_features(features, mask);
2013
2014 return features;
2015}
2016
2017static int team_change_carrier(struct net_device *dev, bool new_carrier)
2018{
2019 struct team *team = netdev_priv(dev);
2020
2021 team->user_carrier_enabled = true;
2022
2023 if (new_carrier)
2024 netif_carrier_on(dev);
2025 else
2026 netif_carrier_off(dev);
2027 return 0;
2028}
2029
2030static const struct net_device_ops team_netdev_ops = {
2031 .ndo_init = team_init,
2032 .ndo_uninit = team_uninit,
2033 .ndo_open = team_open,
2034 .ndo_stop = team_close,
2035 .ndo_start_xmit = team_xmit,
2036 .ndo_select_queue = team_select_queue,
2037 .ndo_change_rx_flags = team_change_rx_flags,
2038 .ndo_set_rx_mode = team_set_rx_mode,
2039 .ndo_set_mac_address = team_set_mac_address,
2040 .ndo_change_mtu = team_change_mtu,
2041 .ndo_get_stats64 = team_get_stats64,
2042 .ndo_vlan_rx_add_vid = team_vlan_rx_add_vid,
2043 .ndo_vlan_rx_kill_vid = team_vlan_rx_kill_vid,
2044#ifdef CONFIG_NET_POLL_CONTROLLER
2045 .ndo_poll_controller = team_poll_controller,
2046 .ndo_netpoll_setup = team_netpoll_setup,
2047 .ndo_netpoll_cleanup = team_netpoll_cleanup,
2048#endif
2049 .ndo_add_slave = team_add_slave,
2050 .ndo_del_slave = team_del_slave,
2051 .ndo_fix_features = team_fix_features,
2052 .ndo_change_carrier = team_change_carrier,
2053 .ndo_features_check = passthru_features_check,
2054};
2055
2056/***********************
2057 * ethtool interface
2058 ***********************/
2059
2060static void team_ethtool_get_drvinfo(struct net_device *dev,
2061 struct ethtool_drvinfo *drvinfo)
2062{
2063 strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
2064 strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2065}
2066
2067static int team_ethtool_get_link_ksettings(struct net_device *dev,
2068 struct ethtool_link_ksettings *cmd)
2069{
2070 struct team *team= netdev_priv(dev);
2071 unsigned long speed = 0;
2072 struct team_port *port;
2073
2074 cmd->base.duplex = DUPLEX_UNKNOWN;
2075 cmd->base.port = PORT_OTHER;
2076
2077 list_for_each_entry(port, &team->port_list, list) {
2078 if (team_port_txable(port)) {
2079 if (port->state.speed != SPEED_UNKNOWN)
2080 speed += port->state.speed;
2081 if (cmd->base.duplex == DUPLEX_UNKNOWN &&
2082 port->state.duplex != DUPLEX_UNKNOWN)
2083 cmd->base.duplex = port->state.duplex;
2084 }
2085 }
2086 cmd->base.speed = speed ? : SPEED_UNKNOWN;
2087
2088 return 0;
2089}
2090
2091static const struct ethtool_ops team_ethtool_ops = {
2092 .get_drvinfo = team_ethtool_get_drvinfo,
2093 .get_link = ethtool_op_get_link,
2094 .get_link_ksettings = team_ethtool_get_link_ksettings,
2095};
2096
2097/***********************
2098 * rt netlink interface
2099 ***********************/
2100
2101static void team_setup_by_port(struct net_device *dev,
2102 struct net_device *port_dev)
2103{
2104 dev->header_ops = port_dev->header_ops;
2105 dev->type = port_dev->type;
2106 dev->hard_header_len = port_dev->hard_header_len;
2107 dev->addr_len = port_dev->addr_len;
2108 dev->mtu = port_dev->mtu;
2109 memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2110 eth_hw_addr_inherit(dev, port_dev);
2111}
2112
2113static int team_dev_type_check_change(struct net_device *dev,
2114 struct net_device *port_dev)
2115{
2116 struct team *team = netdev_priv(dev);
2117 char *portname = port_dev->name;
2118 int err;
2119
2120 if (dev->type == port_dev->type)
2121 return 0;
2122 if (!list_empty(&team->port_list)) {
2123 netdev_err(dev, "Device %s is of different type\n", portname);
2124 return -EBUSY;
2125 }
2126 err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2127 err = notifier_to_errno(err);
2128 if (err) {
2129 netdev_err(dev, "Refused to change device type\n");
2130 return err;
2131 }
2132 dev_uc_flush(dev);
2133 dev_mc_flush(dev);
2134 team_setup_by_port(dev, port_dev);
2135 call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2136 return 0;
2137}
2138
2139static void team_setup(struct net_device *dev)
2140{
2141 ether_setup(dev);
2142 dev->max_mtu = ETH_MAX_MTU;
2143
2144 dev->netdev_ops = &team_netdev_ops;
2145 dev->ethtool_ops = &team_ethtool_ops;
2146 dev->needs_free_netdev = true;
2147 dev->priv_destructor = team_destructor;
2148 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2149 dev->priv_flags |= IFF_NO_QUEUE;
2150 dev->priv_flags |= IFF_TEAM;
2151
2152 /*
2153 * Indicate we support unicast address filtering. That way core won't
2154 * bring us to promisc mode in case a unicast addr is added.
2155 * Let this up to underlay drivers.
2156 */
2157 dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2158
2159 dev->features |= NETIF_F_LLTX;
2160 dev->features |= NETIF_F_GRO;
2161
2162 /* Don't allow team devices to change network namespaces. */
2163 dev->features |= NETIF_F_NETNS_LOCAL;
2164
2165 dev->hw_features = TEAM_VLAN_FEATURES |
2166 NETIF_F_HW_VLAN_CTAG_RX |
2167 NETIF_F_HW_VLAN_CTAG_FILTER;
2168
2169 dev->hw_features |= NETIF_F_GSO_ENCAP_ALL | NETIF_F_GSO_UDP_L4;
2170 dev->features |= dev->hw_features;
2171 dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
2172}
2173
2174static int team_newlink(struct net *src_net, struct net_device *dev,
2175 struct nlattr *tb[], struct nlattr *data[],
2176 struct netlink_ext_ack *extack)
2177{
2178 if (tb[IFLA_ADDRESS] == NULL)
2179 eth_hw_addr_random(dev);
2180
2181 return register_netdevice(dev);
2182}
2183
2184static int team_validate(struct nlattr *tb[], struct nlattr *data[],
2185 struct netlink_ext_ack *extack)
2186{
2187 if (tb[IFLA_ADDRESS]) {
2188 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2189 return -EINVAL;
2190 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2191 return -EADDRNOTAVAIL;
2192 }
2193 return 0;
2194}
2195
2196static unsigned int team_get_num_tx_queues(void)
2197{
2198 return TEAM_DEFAULT_NUM_TX_QUEUES;
2199}
2200
2201static unsigned int team_get_num_rx_queues(void)
2202{
2203 return TEAM_DEFAULT_NUM_RX_QUEUES;
2204}
2205
2206static struct rtnl_link_ops team_link_ops __read_mostly = {
2207 .kind = DRV_NAME,
2208 .priv_size = sizeof(struct team),
2209 .setup = team_setup,
2210 .newlink = team_newlink,
2211 .validate = team_validate,
2212 .get_num_tx_queues = team_get_num_tx_queues,
2213 .get_num_rx_queues = team_get_num_rx_queues,
2214};
2215
2216
2217/***********************************
2218 * Generic netlink custom interface
2219 ***********************************/
2220
2221static struct genl_family team_nl_family;
2222
2223static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2224 [TEAM_ATTR_UNSPEC] = { .type = NLA_UNSPEC, },
2225 [TEAM_ATTR_TEAM_IFINDEX] = { .type = NLA_U32 },
2226 [TEAM_ATTR_LIST_OPTION] = { .type = NLA_NESTED },
2227 [TEAM_ATTR_LIST_PORT] = { .type = NLA_NESTED },
2228};
2229
2230static const struct nla_policy
2231team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2232 [TEAM_ATTR_OPTION_UNSPEC] = { .type = NLA_UNSPEC, },
2233 [TEAM_ATTR_OPTION_NAME] = {
2234 .type = NLA_STRING,
2235 .len = TEAM_STRING_MAX_LEN,
2236 },
2237 [TEAM_ATTR_OPTION_CHANGED] = { .type = NLA_FLAG },
2238 [TEAM_ATTR_OPTION_TYPE] = { .type = NLA_U8 },
2239 [TEAM_ATTR_OPTION_DATA] = { .type = NLA_BINARY },
2240};
2241
2242static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2243{
2244 struct sk_buff *msg;
2245 void *hdr;
2246 int err;
2247
2248 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2249 if (!msg)
2250 return -ENOMEM;
2251
2252 hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2253 &team_nl_family, 0, TEAM_CMD_NOOP);
2254 if (!hdr) {
2255 err = -EMSGSIZE;
2256 goto err_msg_put;
2257 }
2258
2259 genlmsg_end(msg, hdr);
2260
2261 return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2262
2263err_msg_put:
2264 nlmsg_free(msg);
2265
2266 return err;
2267}
2268
2269/*
2270 * Netlink cmd functions should be locked by following two functions.
2271 * Since dev gets held here, that ensures dev won't disappear in between.
2272 */
2273static struct team *team_nl_team_get(struct genl_info *info)
2274{
2275 struct net *net = genl_info_net(info);
2276 int ifindex;
2277 struct net_device *dev;
2278 struct team *team;
2279
2280 if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2281 return NULL;
2282
2283 ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2284 dev = dev_get_by_index(net, ifindex);
2285 if (!dev || dev->netdev_ops != &team_netdev_ops) {
2286 if (dev)
2287 dev_put(dev);
2288 return NULL;
2289 }
2290
2291 team = netdev_priv(dev);
2292 mutex_lock(&team->lock);
2293 return team;
2294}
2295
2296static void team_nl_team_put(struct team *team)
2297{
2298 mutex_unlock(&team->lock);
2299 dev_put(team->dev);
2300}
2301
2302typedef int team_nl_send_func_t(struct sk_buff *skb,
2303 struct team *team, u32 portid);
2304
2305static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2306{
2307 return genlmsg_unicast(dev_net(team->dev), skb, portid);
2308}
2309
2310static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2311 struct team_option_inst *opt_inst)
2312{
2313 struct nlattr *option_item;
2314 struct team_option *option = opt_inst->option;
2315 struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2316 struct team_gsetter_ctx ctx;
2317 int err;
2318
2319 ctx.info = opt_inst_info;
2320 err = team_option_get(team, opt_inst, &ctx);
2321 if (err)
2322 return err;
2323
2324 option_item = nla_nest_start_noflag(skb, TEAM_ATTR_ITEM_OPTION);
2325 if (!option_item)
2326 return -EMSGSIZE;
2327
2328 if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2329 goto nest_cancel;
2330 if (opt_inst_info->port &&
2331 nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2332 opt_inst_info->port->dev->ifindex))
2333 goto nest_cancel;
2334 if (opt_inst->option->array_size &&
2335 nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2336 opt_inst_info->array_index))
2337 goto nest_cancel;
2338
2339 switch (option->type) {
2340 case TEAM_OPTION_TYPE_U32:
2341 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2342 goto nest_cancel;
2343 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2344 goto nest_cancel;
2345 break;
2346 case TEAM_OPTION_TYPE_STRING:
2347 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2348 goto nest_cancel;
2349 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2350 ctx.data.str_val))
2351 goto nest_cancel;
2352 break;
2353 case TEAM_OPTION_TYPE_BINARY:
2354 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2355 goto nest_cancel;
2356 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2357 ctx.data.bin_val.ptr))
2358 goto nest_cancel;
2359 break;
2360 case TEAM_OPTION_TYPE_BOOL:
2361 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2362 goto nest_cancel;
2363 if (ctx.data.bool_val &&
2364 nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2365 goto nest_cancel;
2366 break;
2367 case TEAM_OPTION_TYPE_S32:
2368 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2369 goto nest_cancel;
2370 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2371 goto nest_cancel;
2372 break;
2373 default:
2374 BUG();
2375 }
2376 if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2377 goto nest_cancel;
2378 if (opt_inst->changed) {
2379 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2380 goto nest_cancel;
2381 opt_inst->changed = false;
2382 }
2383 nla_nest_end(skb, option_item);
2384 return 0;
2385
2386nest_cancel:
2387 nla_nest_cancel(skb, option_item);
2388 return -EMSGSIZE;
2389}
2390
2391static int __send_and_alloc_skb(struct sk_buff **pskb,
2392 struct team *team, u32 portid,
2393 team_nl_send_func_t *send_func)
2394{
2395 int err;
2396
2397 if (*pskb) {
2398 err = send_func(*pskb, team, portid);
2399 if (err)
2400 return err;
2401 }
2402 *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2403 if (!*pskb)
2404 return -ENOMEM;
2405 return 0;
2406}
2407
2408static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2409 int flags, team_nl_send_func_t *send_func,
2410 struct list_head *sel_opt_inst_list)
2411{
2412 struct nlattr *option_list;
2413 struct nlmsghdr *nlh;
2414 void *hdr;
2415 struct team_option_inst *opt_inst;
2416 int err;
2417 struct sk_buff *skb = NULL;
2418 bool incomplete;
2419 int i;
2420
2421 opt_inst = list_first_entry(sel_opt_inst_list,
2422 struct team_option_inst, tmp_list);
2423
2424start_again:
2425 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2426 if (err)
2427 return err;
2428
2429 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2430 TEAM_CMD_OPTIONS_GET);
2431 if (!hdr) {
2432 nlmsg_free(skb);
2433 return -EMSGSIZE;
2434 }
2435
2436 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2437 goto nla_put_failure;
2438 option_list = nla_nest_start_noflag(skb, TEAM_ATTR_LIST_OPTION);
2439 if (!option_list)
2440 goto nla_put_failure;
2441
2442 i = 0;
2443 incomplete = false;
2444 list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2445 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2446 if (err) {
2447 if (err == -EMSGSIZE) {
2448 if (!i)
2449 goto errout;
2450 incomplete = true;
2451 break;
2452 }
2453 goto errout;
2454 }
2455 i++;
2456 }
2457
2458 nla_nest_end(skb, option_list);
2459 genlmsg_end(skb, hdr);
2460 if (incomplete)
2461 goto start_again;
2462
2463send_done:
2464 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2465 if (!nlh) {
2466 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2467 if (err)
2468 return err;
2469 goto send_done;
2470 }
2471
2472 return send_func(skb, team, portid);
2473
2474nla_put_failure:
2475 err = -EMSGSIZE;
2476errout:
2477 nlmsg_free(skb);
2478 return err;
2479}
2480
2481static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2482{
2483 struct team *team;
2484 struct team_option_inst *opt_inst;
2485 int err;
2486 LIST_HEAD(sel_opt_inst_list);
2487
2488 team = team_nl_team_get(info);
2489 if (!team)
2490 return -EINVAL;
2491
2492 list_for_each_entry(opt_inst, &team->option_inst_list, list)
2493 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2494 err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2495 NLM_F_ACK, team_nl_send_unicast,
2496 &sel_opt_inst_list);
2497
2498 team_nl_team_put(team);
2499
2500 return err;
2501}
2502
2503static int team_nl_send_event_options_get(struct team *team,
2504 struct list_head *sel_opt_inst_list);
2505
2506static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2507{
2508 struct team *team;
2509 int err = 0;
2510 int i;
2511 struct nlattr *nl_option;
2512
2513 rtnl_lock();
2514
2515 team = team_nl_team_get(info);
2516 if (!team) {
2517 err = -EINVAL;
2518 goto rtnl_unlock;
2519 }
2520
2521 err = -EINVAL;
2522 if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2523 err = -EINVAL;
2524 goto team_put;
2525 }
2526
2527 nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2528 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2529 struct nlattr *attr;
2530 struct nlattr *attr_data;
2531 LIST_HEAD(opt_inst_list);
2532 enum team_option_type opt_type;
2533 int opt_port_ifindex = 0; /* != 0 for per-port options */
2534 u32 opt_array_index = 0;
2535 bool opt_is_array = false;
2536 struct team_option_inst *opt_inst;
2537 char *opt_name;
2538 bool opt_found = false;
2539
2540 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2541 err = -EINVAL;
2542 goto team_put;
2543 }
2544 err = nla_parse_nested_deprecated(opt_attrs,
2545 TEAM_ATTR_OPTION_MAX,
2546 nl_option,
2547 team_nl_option_policy,
2548 info->extack);
2549 if (err)
2550 goto team_put;
2551 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2552 !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2553 err = -EINVAL;
2554 goto team_put;
2555 }
2556 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2557 case NLA_U32:
2558 opt_type = TEAM_OPTION_TYPE_U32;
2559 break;
2560 case NLA_STRING:
2561 opt_type = TEAM_OPTION_TYPE_STRING;
2562 break;
2563 case NLA_BINARY:
2564 opt_type = TEAM_OPTION_TYPE_BINARY;
2565 break;
2566 case NLA_FLAG:
2567 opt_type = TEAM_OPTION_TYPE_BOOL;
2568 break;
2569 case NLA_S32:
2570 opt_type = TEAM_OPTION_TYPE_S32;
2571 break;
2572 default:
2573 goto team_put;
2574 }
2575
2576 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2577 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2578 err = -EINVAL;
2579 goto team_put;
2580 }
2581
2582 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2583 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2584 if (attr)
2585 opt_port_ifindex = nla_get_u32(attr);
2586
2587 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2588 if (attr) {
2589 opt_is_array = true;
2590 opt_array_index = nla_get_u32(attr);
2591 }
2592
2593 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2594 struct team_option *option = opt_inst->option;
2595 struct team_gsetter_ctx ctx;
2596 struct team_option_inst_info *opt_inst_info;
2597 int tmp_ifindex;
2598
2599 opt_inst_info = &opt_inst->info;
2600 tmp_ifindex = opt_inst_info->port ?
2601 opt_inst_info->port->dev->ifindex : 0;
2602 if (option->type != opt_type ||
2603 strcmp(option->name, opt_name) ||
2604 tmp_ifindex != opt_port_ifindex ||
2605 (option->array_size && !opt_is_array) ||
2606 opt_inst_info->array_index != opt_array_index)
2607 continue;
2608 opt_found = true;
2609 ctx.info = opt_inst_info;
2610 switch (opt_type) {
2611 case TEAM_OPTION_TYPE_U32:
2612 ctx.data.u32_val = nla_get_u32(attr_data);
2613 break;
2614 case TEAM_OPTION_TYPE_STRING:
2615 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2616 err = -EINVAL;
2617 goto team_put;
2618 }
2619 ctx.data.str_val = nla_data(attr_data);
2620 break;
2621 case TEAM_OPTION_TYPE_BINARY:
2622 ctx.data.bin_val.len = nla_len(attr_data);
2623 ctx.data.bin_val.ptr = nla_data(attr_data);
2624 break;
2625 case TEAM_OPTION_TYPE_BOOL:
2626 ctx.data.bool_val = attr_data ? true : false;
2627 break;
2628 case TEAM_OPTION_TYPE_S32:
2629 ctx.data.s32_val = nla_get_s32(attr_data);
2630 break;
2631 default:
2632 BUG();
2633 }
2634 err = team_option_set(team, opt_inst, &ctx);
2635 if (err)
2636 goto team_put;
2637 opt_inst->changed = true;
2638 list_add(&opt_inst->tmp_list, &opt_inst_list);
2639 }
2640 if (!opt_found) {
2641 err = -ENOENT;
2642 goto team_put;
2643 }
2644
2645 err = team_nl_send_event_options_get(team, &opt_inst_list);
2646 if (err)
2647 break;
2648 }
2649
2650team_put:
2651 team_nl_team_put(team);
2652rtnl_unlock:
2653 rtnl_unlock();
2654 return err;
2655}
2656
2657static int team_nl_fill_one_port_get(struct sk_buff *skb,
2658 struct team_port *port)
2659{
2660 struct nlattr *port_item;
2661
2662 port_item = nla_nest_start_noflag(skb, TEAM_ATTR_ITEM_PORT);
2663 if (!port_item)
2664 goto nest_cancel;
2665 if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2666 goto nest_cancel;
2667 if (port->changed) {
2668 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2669 goto nest_cancel;
2670 port->changed = false;
2671 }
2672 if ((port->removed &&
2673 nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2674 (port->state.linkup &&
2675 nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2676 nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2677 nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2678 goto nest_cancel;
2679 nla_nest_end(skb, port_item);
2680 return 0;
2681
2682nest_cancel:
2683 nla_nest_cancel(skb, port_item);
2684 return -EMSGSIZE;
2685}
2686
2687static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2688 int flags, team_nl_send_func_t *send_func,
2689 struct team_port *one_port)
2690{
2691 struct nlattr *port_list;
2692 struct nlmsghdr *nlh;
2693 void *hdr;
2694 struct team_port *port;
2695 int err;
2696 struct sk_buff *skb = NULL;
2697 bool incomplete;
2698 int i;
2699
2700 port = list_first_entry_or_null(&team->port_list,
2701 struct team_port, list);
2702
2703start_again:
2704 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2705 if (err)
2706 return err;
2707
2708 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2709 TEAM_CMD_PORT_LIST_GET);
2710 if (!hdr) {
2711 nlmsg_free(skb);
2712 return -EMSGSIZE;
2713 }
2714
2715 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2716 goto nla_put_failure;
2717 port_list = nla_nest_start_noflag(skb, TEAM_ATTR_LIST_PORT);
2718 if (!port_list)
2719 goto nla_put_failure;
2720
2721 i = 0;
2722 incomplete = false;
2723
2724 /* If one port is selected, called wants to send port list containing
2725 * only this port. Otherwise go through all listed ports and send all
2726 */
2727 if (one_port) {
2728 err = team_nl_fill_one_port_get(skb, one_port);
2729 if (err)
2730 goto errout;
2731 } else if (port) {
2732 list_for_each_entry_from(port, &team->port_list, list) {
2733 err = team_nl_fill_one_port_get(skb, port);
2734 if (err) {
2735 if (err == -EMSGSIZE) {
2736 if (!i)
2737 goto errout;
2738 incomplete = true;
2739 break;
2740 }
2741 goto errout;
2742 }
2743 i++;
2744 }
2745 }
2746
2747 nla_nest_end(skb, port_list);
2748 genlmsg_end(skb, hdr);
2749 if (incomplete)
2750 goto start_again;
2751
2752send_done:
2753 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2754 if (!nlh) {
2755 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2756 if (err)
2757 return err;
2758 goto send_done;
2759 }
2760
2761 return send_func(skb, team, portid);
2762
2763nla_put_failure:
2764 err = -EMSGSIZE;
2765errout:
2766 nlmsg_free(skb);
2767 return err;
2768}
2769
2770static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2771 struct genl_info *info)
2772{
2773 struct team *team;
2774 int err;
2775
2776 team = team_nl_team_get(info);
2777 if (!team)
2778 return -EINVAL;
2779
2780 err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2781 NLM_F_ACK, team_nl_send_unicast, NULL);
2782
2783 team_nl_team_put(team);
2784
2785 return err;
2786}
2787
2788static const struct genl_ops team_nl_ops[] = {
2789 {
2790 .cmd = TEAM_CMD_NOOP,
2791 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2792 .doit = team_nl_cmd_noop,
2793 },
2794 {
2795 .cmd = TEAM_CMD_OPTIONS_SET,
2796 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2797 .doit = team_nl_cmd_options_set,
2798 .flags = GENL_ADMIN_PERM,
2799 },
2800 {
2801 .cmd = TEAM_CMD_OPTIONS_GET,
2802 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2803 .doit = team_nl_cmd_options_get,
2804 .flags = GENL_ADMIN_PERM,
2805 },
2806 {
2807 .cmd = TEAM_CMD_PORT_LIST_GET,
2808 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2809 .doit = team_nl_cmd_port_list_get,
2810 .flags = GENL_ADMIN_PERM,
2811 },
2812};
2813
2814static const struct genl_multicast_group team_nl_mcgrps[] = {
2815 { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2816};
2817
2818static struct genl_family team_nl_family __ro_after_init = {
2819 .name = TEAM_GENL_NAME,
2820 .version = TEAM_GENL_VERSION,
2821 .maxattr = TEAM_ATTR_MAX,
2822 .policy = team_nl_policy,
2823 .netnsok = true,
2824 .module = THIS_MODULE,
2825 .ops = team_nl_ops,
2826 .n_ops = ARRAY_SIZE(team_nl_ops),
2827 .mcgrps = team_nl_mcgrps,
2828 .n_mcgrps = ARRAY_SIZE(team_nl_mcgrps),
2829};
2830
2831static int team_nl_send_multicast(struct sk_buff *skb,
2832 struct team *team, u32 portid)
2833{
2834 return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2835 skb, 0, 0, GFP_KERNEL);
2836}
2837
2838static int team_nl_send_event_options_get(struct team *team,
2839 struct list_head *sel_opt_inst_list)
2840{
2841 return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2842 sel_opt_inst_list);
2843}
2844
2845static int team_nl_send_event_port_get(struct team *team,
2846 struct team_port *port)
2847{
2848 return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2849 port);
2850}
2851
2852static int __init team_nl_init(void)
2853{
2854 return genl_register_family(&team_nl_family);
2855}
2856
2857static void team_nl_fini(void)
2858{
2859 genl_unregister_family(&team_nl_family);
2860}
2861
2862
2863/******************
2864 * Change checkers
2865 ******************/
2866
2867static void __team_options_change_check(struct team *team)
2868{
2869 int err;
2870 struct team_option_inst *opt_inst;
2871 LIST_HEAD(sel_opt_inst_list);
2872
2873 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2874 if (opt_inst->changed)
2875 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2876 }
2877 err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2878 if (err && err != -ESRCH)
2879 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2880 err);
2881}
2882
2883/* rtnl lock is held */
2884
2885static void __team_port_change_send(struct team_port *port, bool linkup)
2886{
2887 int err;
2888
2889 port->changed = true;
2890 port->state.linkup = linkup;
2891 team_refresh_port_linkup(port);
2892 if (linkup) {
2893 struct ethtool_link_ksettings ecmd;
2894
2895 err = __ethtool_get_link_ksettings(port->dev, &ecmd);
2896 if (!err) {
2897 port->state.speed = ecmd.base.speed;
2898 port->state.duplex = ecmd.base.duplex;
2899 goto send_event;
2900 }
2901 }
2902 port->state.speed = 0;
2903 port->state.duplex = 0;
2904
2905send_event:
2906 err = team_nl_send_event_port_get(port->team, port);
2907 if (err && err != -ESRCH)
2908 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2909 port->dev->name, err);
2910
2911}
2912
2913static void __team_carrier_check(struct team *team)
2914{
2915 struct team_port *port;
2916 bool team_linkup;
2917
2918 if (team->user_carrier_enabled)
2919 return;
2920
2921 team_linkup = false;
2922 list_for_each_entry(port, &team->port_list, list) {
2923 if (port->linkup) {
2924 team_linkup = true;
2925 break;
2926 }
2927 }
2928
2929 if (team_linkup)
2930 netif_carrier_on(team->dev);
2931 else
2932 netif_carrier_off(team->dev);
2933}
2934
2935static void __team_port_change_check(struct team_port *port, bool linkup)
2936{
2937 if (port->state.linkup != linkup)
2938 __team_port_change_send(port, linkup);
2939 __team_carrier_check(port->team);
2940}
2941
2942static void __team_port_change_port_added(struct team_port *port, bool linkup)
2943{
2944 __team_port_change_send(port, linkup);
2945 __team_carrier_check(port->team);
2946}
2947
2948static void __team_port_change_port_removed(struct team_port *port)
2949{
2950 port->removed = true;
2951 __team_port_change_send(port, false);
2952 __team_carrier_check(port->team);
2953}
2954
2955static void team_port_change_check(struct team_port *port, bool linkup)
2956{
2957 struct team *team = port->team;
2958
2959 mutex_lock(&team->lock);
2960 __team_port_change_check(port, linkup);
2961 mutex_unlock(&team->lock);
2962}
2963
2964
2965/************************************
2966 * Net device notifier event handler
2967 ************************************/
2968
2969static int team_device_event(struct notifier_block *unused,
2970 unsigned long event, void *ptr)
2971{
2972 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2973 struct team_port *port;
2974
2975 port = team_port_get_rtnl(dev);
2976 if (!port)
2977 return NOTIFY_DONE;
2978
2979 switch (event) {
2980 case NETDEV_UP:
2981 if (netif_oper_up(dev))
2982 team_port_change_check(port, true);
2983 break;
2984 case NETDEV_DOWN:
2985 team_port_change_check(port, false);
2986 break;
2987 case NETDEV_CHANGE:
2988 if (netif_running(port->dev))
2989 team_port_change_check(port,
2990 !!netif_oper_up(port->dev));
2991 break;
2992 case NETDEV_UNREGISTER:
2993 team_del_slave(port->team->dev, dev);
2994 break;
2995 case NETDEV_FEAT_CHANGE:
2996 team_compute_features(port->team);
2997 break;
2998 case NETDEV_PRECHANGEMTU:
2999 /* Forbid to change mtu of underlaying device */
3000 if (!port->team->port_mtu_change_allowed)
3001 return NOTIFY_BAD;
3002 break;
3003 case NETDEV_PRE_TYPE_CHANGE:
3004 /* Forbid to change type of underlaying device */
3005 return NOTIFY_BAD;
3006 case NETDEV_RESEND_IGMP:
3007 /* Propagate to master device */
3008 call_netdevice_notifiers(event, port->team->dev);
3009 break;
3010 }
3011 return NOTIFY_DONE;
3012}
3013
3014static struct notifier_block team_notifier_block __read_mostly = {
3015 .notifier_call = team_device_event,
3016};
3017
3018
3019/***********************
3020 * Module init and exit
3021 ***********************/
3022
3023static int __init team_module_init(void)
3024{
3025 int err;
3026
3027 register_netdevice_notifier(&team_notifier_block);
3028
3029 err = rtnl_link_register(&team_link_ops);
3030 if (err)
3031 goto err_rtnl_reg;
3032
3033 err = team_nl_init();
3034 if (err)
3035 goto err_nl_init;
3036
3037 return 0;
3038
3039err_nl_init:
3040 rtnl_link_unregister(&team_link_ops);
3041
3042err_rtnl_reg:
3043 unregister_netdevice_notifier(&team_notifier_block);
3044
3045 return err;
3046}
3047
3048static void __exit team_module_exit(void)
3049{
3050 team_nl_fini();
3051 rtnl_link_unregister(&team_link_ops);
3052 unregister_netdevice_notifier(&team_notifier_block);
3053}
3054
3055module_init(team_module_init);
3056module_exit(team_module_exit);
3057
3058MODULE_LICENSE("GPL v2");
3059MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
3060MODULE_DESCRIPTION("Ethernet team device driver");
3061MODULE_ALIAS_RTNL_LINK(DRV_NAME);