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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/ethtool.h>
8#include <linux/kernel.h>
9#include <linux/types.h>
10#include <linux/module.h>
11#include <linux/init.h>
12#include <linux/slab.h>
13#include <linux/rcupdate.h>
14#include <linux/errno.h>
15#include <linux/ctype.h>
16#include <linux/notifier.h>
17#include <linux/netdevice.h>
18#include <linux/netpoll.h>
19#include <linux/if_vlan.h>
20#include <linux/if_arp.h>
21#include <linux/socket.h>
22#include <linux/etherdevice.h>
23#include <linux/rtnetlink.h>
24#include <net/rtnetlink.h>
25#include <net/genetlink.h>
26#include <net/netlink.h>
27#include <net/sch_generic.h>
28#include <generated/utsrelease.h>
29#include <linux/if_team.h>
30
31#define DRV_NAME "team"
32
33
34/**********
35 * Helpers
36 **********/
37
38static struct team_port *team_port_get_rtnl(const struct net_device *dev)
39{
40 struct team_port *port = rtnl_dereference(dev->rx_handler_data);
41
42 return netif_is_team_port(dev) ? port : NULL;
43}
44
45/*
46 * Since the ability to change device address for open port device is tested in
47 * team_port_add, this function can be called without control of return value
48 */
49static int __set_port_dev_addr(struct net_device *port_dev,
50 const unsigned char *dev_addr)
51{
52 struct sockaddr_storage addr;
53
54 memcpy(addr.__data, dev_addr, port_dev->addr_len);
55 addr.ss_family = port_dev->type;
56 return dev_set_mac_address(port_dev, (struct sockaddr *)&addr, NULL);
57}
58
59static int team_port_set_orig_dev_addr(struct team_port *port)
60{
61 return __set_port_dev_addr(port->dev, port->orig.dev_addr);
62}
63
64static int team_port_set_team_dev_addr(struct team *team,
65 struct team_port *port)
66{
67 return __set_port_dev_addr(port->dev, team->dev->dev_addr);
68}
69
70int team_modeop_port_enter(struct team *team, struct team_port *port)
71{
72 return team_port_set_team_dev_addr(team, port);
73}
74EXPORT_SYMBOL(team_modeop_port_enter);
75
76void team_modeop_port_change_dev_addr(struct team *team,
77 struct team_port *port)
78{
79 team_port_set_team_dev_addr(team, port);
80}
81EXPORT_SYMBOL(team_modeop_port_change_dev_addr);
82
83static void team_lower_state_changed(struct team_port *port)
84{
85 struct netdev_lag_lower_state_info info;
86
87 info.link_up = port->linkup;
88 info.tx_enabled = team_port_enabled(port);
89 netdev_lower_state_changed(port->dev, &info);
90}
91
92static void team_refresh_port_linkup(struct team_port *port)
93{
94 bool new_linkup = port->user.linkup_enabled ? port->user.linkup :
95 port->state.linkup;
96
97 if (port->linkup != new_linkup) {
98 port->linkup = new_linkup;
99 team_lower_state_changed(port);
100 }
101}
102
103
104/*******************
105 * Options handling
106 *******************/
107
108struct team_option_inst { /* One for each option instance */
109 struct list_head list;
110 struct list_head tmp_list;
111 struct team_option *option;
112 struct team_option_inst_info info;
113 bool changed;
114 bool removed;
115};
116
117static struct team_option *__team_find_option(struct team *team,
118 const char *opt_name)
119{
120 struct team_option *option;
121
122 list_for_each_entry(option, &team->option_list, list) {
123 if (strcmp(option->name, opt_name) == 0)
124 return option;
125 }
126 return NULL;
127}
128
129static void __team_option_inst_del(struct team_option_inst *opt_inst)
130{
131 list_del(&opt_inst->list);
132 kfree(opt_inst);
133}
134
135static void __team_option_inst_del_option(struct team *team,
136 struct team_option *option)
137{
138 struct team_option_inst *opt_inst, *tmp;
139
140 list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
141 if (opt_inst->option == option)
142 __team_option_inst_del(opt_inst);
143 }
144}
145
146static int __team_option_inst_add(struct team *team, struct team_option *option,
147 struct team_port *port)
148{
149 struct team_option_inst *opt_inst;
150 unsigned int array_size;
151 unsigned int i;
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 option->init(team, &opt_inst->info);
169
170 }
171 return 0;
172}
173
174static int __team_option_inst_add_option(struct team *team,
175 struct team_option *option)
176{
177 int err;
178
179 if (!option->per_port) {
180 err = __team_option_inst_add(team, option, NULL);
181 if (err)
182 goto inst_del_option;
183 }
184 return 0;
185
186inst_del_option:
187 __team_option_inst_del_option(team, option);
188 return err;
189}
190
191static void __team_option_inst_mark_removed_option(struct team *team,
192 struct team_option *option)
193{
194 struct team_option_inst *opt_inst;
195
196 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
197 if (opt_inst->option == option) {
198 opt_inst->changed = true;
199 opt_inst->removed = true;
200 }
201 }
202}
203
204static void __team_option_inst_del_port(struct team *team,
205 struct team_port *port)
206{
207 struct team_option_inst *opt_inst, *tmp;
208
209 list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
210 if (opt_inst->option->per_port &&
211 opt_inst->info.port == port)
212 __team_option_inst_del(opt_inst);
213 }
214}
215
216static int __team_option_inst_add_port(struct team *team,
217 struct team_port *port)
218{
219 struct team_option *option;
220 int err;
221
222 list_for_each_entry(option, &team->option_list, list) {
223 if (!option->per_port)
224 continue;
225 err = __team_option_inst_add(team, option, port);
226 if (err)
227 goto inst_del_port;
228 }
229 return 0;
230
231inst_del_port:
232 __team_option_inst_del_port(team, port);
233 return err;
234}
235
236static void __team_option_inst_mark_removed_port(struct team *team,
237 struct team_port *port)
238{
239 struct team_option_inst *opt_inst;
240
241 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
242 if (opt_inst->info.port == port) {
243 opt_inst->changed = true;
244 opt_inst->removed = true;
245 }
246 }
247}
248
249static int __team_options_register(struct team *team,
250 const struct team_option *option,
251 size_t option_count)
252{
253 int i;
254 struct team_option **dst_opts;
255 int err;
256
257 dst_opts = kcalloc(option_count, sizeof(struct team_option *),
258 GFP_KERNEL);
259 if (!dst_opts)
260 return -ENOMEM;
261 for (i = 0; i < option_count; i++, option++) {
262 if (__team_find_option(team, option->name)) {
263 err = -EEXIST;
264 goto alloc_rollback;
265 }
266 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
267 if (!dst_opts[i]) {
268 err = -ENOMEM;
269 goto alloc_rollback;
270 }
271 }
272
273 for (i = 0; i < option_count; i++) {
274 err = __team_option_inst_add_option(team, dst_opts[i]);
275 if (err)
276 goto inst_rollback;
277 list_add_tail(&dst_opts[i]->list, &team->option_list);
278 }
279
280 kfree(dst_opts);
281 return 0;
282
283inst_rollback:
284 for (i--; i >= 0; i--) {
285 __team_option_inst_del_option(team, dst_opts[i]);
286 list_del(&dst_opts[i]->list);
287 }
288
289 i = option_count;
290alloc_rollback:
291 for (i--; i >= 0; i--)
292 kfree(dst_opts[i]);
293
294 kfree(dst_opts);
295 return err;
296}
297
298static void __team_options_mark_removed(struct team *team,
299 const struct team_option *option,
300 size_t option_count)
301{
302 int i;
303
304 for (i = 0; i < option_count; i++, option++) {
305 struct team_option *del_opt;
306
307 del_opt = __team_find_option(team, option->name);
308 if (del_opt)
309 __team_option_inst_mark_removed_option(team, del_opt);
310 }
311}
312
313static void __team_options_unregister(struct team *team,
314 const struct team_option *option,
315 size_t option_count)
316{
317 int i;
318
319 for (i = 0; i < option_count; i++, option++) {
320 struct team_option *del_opt;
321
322 del_opt = __team_find_option(team, option->name);
323 if (del_opt) {
324 __team_option_inst_del_option(team, del_opt);
325 list_del(&del_opt->list);
326 kfree(del_opt);
327 }
328 }
329}
330
331static void __team_options_change_check(struct team *team);
332
333int team_options_register(struct team *team,
334 const struct team_option *option,
335 size_t option_count)
336{
337 int err;
338
339 err = __team_options_register(team, option, option_count);
340 if (err)
341 return err;
342 __team_options_change_check(team);
343 return 0;
344}
345EXPORT_SYMBOL(team_options_register);
346
347void team_options_unregister(struct team *team,
348 const struct team_option *option,
349 size_t option_count)
350{
351 __team_options_mark_removed(team, option, option_count);
352 __team_options_change_check(team);
353 __team_options_unregister(team, option, option_count);
354}
355EXPORT_SYMBOL(team_options_unregister);
356
357static int team_option_get(struct team *team,
358 struct team_option_inst *opt_inst,
359 struct team_gsetter_ctx *ctx)
360{
361 if (!opt_inst->option->getter)
362 return -EOPNOTSUPP;
363
364 opt_inst->option->getter(team, ctx);
365 return 0;
366}
367
368static int team_option_set(struct team *team,
369 struct team_option_inst *opt_inst,
370 struct team_gsetter_ctx *ctx)
371{
372 if (!opt_inst->option->setter)
373 return -EOPNOTSUPP;
374 return opt_inst->option->setter(team, ctx);
375}
376
377void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info)
378{
379 struct team_option_inst *opt_inst;
380
381 opt_inst = container_of(opt_inst_info, struct team_option_inst, info);
382 opt_inst->changed = true;
383}
384EXPORT_SYMBOL(team_option_inst_set_change);
385
386void team_options_change_check(struct team *team)
387{
388 __team_options_change_check(team);
389}
390EXPORT_SYMBOL(team_options_change_check);
391
392
393/****************
394 * Mode handling
395 ****************/
396
397static LIST_HEAD(mode_list);
398static DEFINE_SPINLOCK(mode_list_lock);
399
400struct team_mode_item {
401 struct list_head list;
402 const struct team_mode *mode;
403};
404
405static struct team_mode_item *__find_mode(const char *kind)
406{
407 struct team_mode_item *mitem;
408
409 list_for_each_entry(mitem, &mode_list, list) {
410 if (strcmp(mitem->mode->kind, kind) == 0)
411 return mitem;
412 }
413 return NULL;
414}
415
416static bool is_good_mode_name(const char *name)
417{
418 while (*name != '\0') {
419 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
420 return false;
421 name++;
422 }
423 return true;
424}
425
426int team_mode_register(const struct team_mode *mode)
427{
428 int err = 0;
429 struct team_mode_item *mitem;
430
431 if (!is_good_mode_name(mode->kind) ||
432 mode->priv_size > TEAM_MODE_PRIV_SIZE)
433 return -EINVAL;
434
435 mitem = kmalloc(sizeof(*mitem), GFP_KERNEL);
436 if (!mitem)
437 return -ENOMEM;
438
439 spin_lock(&mode_list_lock);
440 if (__find_mode(mode->kind)) {
441 err = -EEXIST;
442 kfree(mitem);
443 goto unlock;
444 }
445 mitem->mode = mode;
446 list_add_tail(&mitem->list, &mode_list);
447unlock:
448 spin_unlock(&mode_list_lock);
449 return err;
450}
451EXPORT_SYMBOL(team_mode_register);
452
453void team_mode_unregister(const struct team_mode *mode)
454{
455 struct team_mode_item *mitem;
456
457 spin_lock(&mode_list_lock);
458 mitem = __find_mode(mode->kind);
459 if (mitem) {
460 list_del_init(&mitem->list);
461 kfree(mitem);
462 }
463 spin_unlock(&mode_list_lock);
464}
465EXPORT_SYMBOL(team_mode_unregister);
466
467static const struct team_mode *team_mode_get(const char *kind)
468{
469 struct team_mode_item *mitem;
470 const struct team_mode *mode = NULL;
471
472 if (!try_module_get(THIS_MODULE))
473 return NULL;
474
475 spin_lock(&mode_list_lock);
476 mitem = __find_mode(kind);
477 if (!mitem) {
478 spin_unlock(&mode_list_lock);
479 request_module("team-mode-%s", kind);
480 spin_lock(&mode_list_lock);
481 mitem = __find_mode(kind);
482 }
483 if (mitem) {
484 mode = mitem->mode;
485 if (!try_module_get(mode->owner))
486 mode = NULL;
487 }
488
489 spin_unlock(&mode_list_lock);
490 module_put(THIS_MODULE);
491 return mode;
492}
493
494static void team_mode_put(const struct team_mode *mode)
495{
496 module_put(mode->owner);
497}
498
499static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
500{
501 dev_kfree_skb_any(skb);
502 return false;
503}
504
505static rx_handler_result_t team_dummy_receive(struct team *team,
506 struct team_port *port,
507 struct sk_buff *skb)
508{
509 return RX_HANDLER_ANOTHER;
510}
511
512static const struct team_mode __team_no_mode = {
513 .kind = "*NOMODE*",
514};
515
516static bool team_is_mode_set(struct team *team)
517{
518 return team->mode != &__team_no_mode;
519}
520
521static void team_set_no_mode(struct team *team)
522{
523 team->user_carrier_enabled = false;
524 team->mode = &__team_no_mode;
525}
526
527static void team_adjust_ops(struct team *team)
528{
529 /*
530 * To avoid checks in rx/tx skb paths, ensure here that non-null and
531 * correct ops are always set.
532 */
533
534 if (!team->en_port_count || !team_is_mode_set(team) ||
535 !team->mode->ops->transmit)
536 team->ops.transmit = team_dummy_transmit;
537 else
538 team->ops.transmit = team->mode->ops->transmit;
539
540 if (!team->en_port_count || !team_is_mode_set(team) ||
541 !team->mode->ops->receive)
542 team->ops.receive = team_dummy_receive;
543 else
544 team->ops.receive = team->mode->ops->receive;
545}
546
547/*
548 * We can benefit from the fact that it's ensured no port is present
549 * at the time of mode change. Therefore no packets are in fly so there's no
550 * need to set mode operations in any special way.
551 */
552static int __team_change_mode(struct team *team,
553 const struct team_mode *new_mode)
554{
555 /* Check if mode was previously set and do cleanup if so */
556 if (team_is_mode_set(team)) {
557 void (*exit_op)(struct team *team) = team->ops.exit;
558
559 /* Clear ops area so no callback is called any longer */
560 memset(&team->ops, 0, sizeof(struct team_mode_ops));
561 team_adjust_ops(team);
562
563 if (exit_op)
564 exit_op(team);
565 team_mode_put(team->mode);
566 team_set_no_mode(team);
567 /* zero private data area */
568 memset(&team->mode_priv, 0,
569 sizeof(struct team) - offsetof(struct team, mode_priv));
570 }
571
572 if (!new_mode)
573 return 0;
574
575 if (new_mode->ops->init) {
576 int err;
577
578 err = new_mode->ops->init(team);
579 if (err)
580 return err;
581 }
582
583 team->mode = new_mode;
584 memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
585 team_adjust_ops(team);
586
587 return 0;
588}
589
590static int team_change_mode(struct team *team, const char *kind)
591{
592 const struct team_mode *new_mode;
593 struct net_device *dev = team->dev;
594 int err;
595
596 if (!list_empty(&team->port_list)) {
597 netdev_err(dev, "No ports can be present during mode change\n");
598 return -EBUSY;
599 }
600
601 if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) {
602 netdev_err(dev, "Unable to change to the same mode the team is in\n");
603 return -EINVAL;
604 }
605
606 new_mode = team_mode_get(kind);
607 if (!new_mode) {
608 netdev_err(dev, "Mode \"%s\" not found\n", kind);
609 return -EINVAL;
610 }
611
612 err = __team_change_mode(team, new_mode);
613 if (err) {
614 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
615 team_mode_put(new_mode);
616 return err;
617 }
618
619 netdev_info(dev, "Mode changed to \"%s\"\n", kind);
620 return 0;
621}
622
623
624/*********************
625 * Peers notification
626 *********************/
627
628static void team_notify_peers_work(struct work_struct *work)
629{
630 struct team *team;
631 int val;
632
633 team = container_of(work, struct team, notify_peers.dw.work);
634
635 if (!rtnl_trylock()) {
636 schedule_delayed_work(&team->notify_peers.dw, 0);
637 return;
638 }
639 val = atomic_dec_if_positive(&team->notify_peers.count_pending);
640 if (val < 0) {
641 rtnl_unlock();
642 return;
643 }
644 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, team->dev);
645 rtnl_unlock();
646 if (val)
647 schedule_delayed_work(&team->notify_peers.dw,
648 msecs_to_jiffies(team->notify_peers.interval));
649}
650
651static void team_notify_peers(struct team *team)
652{
653 if (!team->notify_peers.count || !netif_running(team->dev))
654 return;
655 atomic_add(team->notify_peers.count, &team->notify_peers.count_pending);
656 schedule_delayed_work(&team->notify_peers.dw, 0);
657}
658
659static void team_notify_peers_init(struct team *team)
660{
661 INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work);
662}
663
664static void team_notify_peers_fini(struct team *team)
665{
666 cancel_delayed_work_sync(&team->notify_peers.dw);
667}
668
669
670/*******************************
671 * Send multicast group rejoins
672 *******************************/
673
674static void team_mcast_rejoin_work(struct work_struct *work)
675{
676 struct team *team;
677 int val;
678
679 team = container_of(work, struct team, mcast_rejoin.dw.work);
680
681 if (!rtnl_trylock()) {
682 schedule_delayed_work(&team->mcast_rejoin.dw, 0);
683 return;
684 }
685 val = atomic_dec_if_positive(&team->mcast_rejoin.count_pending);
686 if (val < 0) {
687 rtnl_unlock();
688 return;
689 }
690 call_netdevice_notifiers(NETDEV_RESEND_IGMP, team->dev);
691 rtnl_unlock();
692 if (val)
693 schedule_delayed_work(&team->mcast_rejoin.dw,
694 msecs_to_jiffies(team->mcast_rejoin.interval));
695}
696
697static void team_mcast_rejoin(struct team *team)
698{
699 if (!team->mcast_rejoin.count || !netif_running(team->dev))
700 return;
701 atomic_add(team->mcast_rejoin.count, &team->mcast_rejoin.count_pending);
702 schedule_delayed_work(&team->mcast_rejoin.dw, 0);
703}
704
705static void team_mcast_rejoin_init(struct team *team)
706{
707 INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work);
708}
709
710static void team_mcast_rejoin_fini(struct team *team)
711{
712 cancel_delayed_work_sync(&team->mcast_rejoin.dw);
713}
714
715
716/************************
717 * Rx path frame handler
718 ************************/
719
720/* note: already called with rcu_read_lock */
721static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
722{
723 struct sk_buff *skb = *pskb;
724 struct team_port *port;
725 struct team *team;
726 rx_handler_result_t res;
727
728 skb = skb_share_check(skb, GFP_ATOMIC);
729 if (!skb)
730 return RX_HANDLER_CONSUMED;
731
732 *pskb = skb;
733
734 port = team_port_get_rcu(skb->dev);
735 team = port->team;
736 if (!team_port_enabled(port)) {
737 if (is_link_local_ether_addr(eth_hdr(skb)->h_dest))
738 /* link-local packets are mostly useful when stack receives them
739 * with the link they arrive on.
740 */
741 return RX_HANDLER_PASS;
742 /* allow exact match delivery for disabled ports */
743 res = RX_HANDLER_EXACT;
744 } else {
745 res = team->ops.receive(team, port, skb);
746 }
747 if (res == RX_HANDLER_ANOTHER) {
748 struct team_pcpu_stats *pcpu_stats;
749
750 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
751 u64_stats_update_begin(&pcpu_stats->syncp);
752 u64_stats_inc(&pcpu_stats->rx_packets);
753 u64_stats_add(&pcpu_stats->rx_bytes, skb->len);
754 if (skb->pkt_type == PACKET_MULTICAST)
755 u64_stats_inc(&pcpu_stats->rx_multicast);
756 u64_stats_update_end(&pcpu_stats->syncp);
757
758 skb->dev = team->dev;
759 } else if (res == RX_HANDLER_EXACT) {
760 this_cpu_inc(team->pcpu_stats->rx_nohandler);
761 } else {
762 this_cpu_inc(team->pcpu_stats->rx_dropped);
763 }
764
765 return res;
766}
767
768
769/*************************************
770 * Multiqueue Tx port select override
771 *************************************/
772
773static int team_queue_override_init(struct team *team)
774{
775 struct list_head *listarr;
776 unsigned int queue_cnt = team->dev->num_tx_queues - 1;
777 unsigned int i;
778
779 if (!queue_cnt)
780 return 0;
781 listarr = kmalloc_array(queue_cnt, sizeof(struct list_head),
782 GFP_KERNEL);
783 if (!listarr)
784 return -ENOMEM;
785 team->qom_lists = listarr;
786 for (i = 0; i < queue_cnt; i++)
787 INIT_LIST_HEAD(listarr++);
788 return 0;
789}
790
791static void team_queue_override_fini(struct team *team)
792{
793 kfree(team->qom_lists);
794}
795
796static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
797{
798 return &team->qom_lists[queue_id - 1];
799}
800
801/*
802 * note: already called with rcu_read_lock
803 */
804static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
805{
806 struct list_head *qom_list;
807 struct team_port *port;
808
809 if (!team->queue_override_enabled || !skb->queue_mapping)
810 return false;
811 qom_list = __team_get_qom_list(team, skb->queue_mapping);
812 list_for_each_entry_rcu(port, qom_list, qom_list) {
813 if (!team_dev_queue_xmit(team, port, skb))
814 return true;
815 }
816 return false;
817}
818
819static void __team_queue_override_port_del(struct team *team,
820 struct team_port *port)
821{
822 if (!port->queue_id)
823 return;
824 list_del_rcu(&port->qom_list);
825}
826
827static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
828 struct team_port *cur)
829{
830 if (port->priority < cur->priority)
831 return true;
832 if (port->priority > cur->priority)
833 return false;
834 if (port->index < cur->index)
835 return true;
836 return false;
837}
838
839static void __team_queue_override_port_add(struct team *team,
840 struct team_port *port)
841{
842 struct team_port *cur;
843 struct list_head *qom_list;
844 struct list_head *node;
845
846 if (!port->queue_id)
847 return;
848 qom_list = __team_get_qom_list(team, port->queue_id);
849 node = qom_list;
850 list_for_each_entry(cur, qom_list, qom_list) {
851 if (team_queue_override_port_has_gt_prio_than(port, cur))
852 break;
853 node = &cur->qom_list;
854 }
855 list_add_tail_rcu(&port->qom_list, node);
856}
857
858static void __team_queue_override_enabled_check(struct team *team)
859{
860 struct team_port *port;
861 bool enabled = false;
862
863 list_for_each_entry(port, &team->port_list, list) {
864 if (port->queue_id) {
865 enabled = true;
866 break;
867 }
868 }
869 if (enabled == team->queue_override_enabled)
870 return;
871 netdev_dbg(team->dev, "%s queue override\n",
872 enabled ? "Enabling" : "Disabling");
873 team->queue_override_enabled = enabled;
874}
875
876static void team_queue_override_port_prio_changed(struct team *team,
877 struct team_port *port)
878{
879 if (!port->queue_id || team_port_enabled(port))
880 return;
881 __team_queue_override_port_del(team, port);
882 __team_queue_override_port_add(team, port);
883 __team_queue_override_enabled_check(team);
884}
885
886static void team_queue_override_port_change_queue_id(struct team *team,
887 struct team_port *port,
888 u16 new_queue_id)
889{
890 if (team_port_enabled(port)) {
891 __team_queue_override_port_del(team, port);
892 port->queue_id = new_queue_id;
893 __team_queue_override_port_add(team, port);
894 __team_queue_override_enabled_check(team);
895 } else {
896 port->queue_id = new_queue_id;
897 }
898}
899
900static void team_queue_override_port_add(struct team *team,
901 struct team_port *port)
902{
903 __team_queue_override_port_add(team, port);
904 __team_queue_override_enabled_check(team);
905}
906
907static void team_queue_override_port_del(struct team *team,
908 struct team_port *port)
909{
910 __team_queue_override_port_del(team, port);
911 __team_queue_override_enabled_check(team);
912}
913
914
915/****************
916 * Port handling
917 ****************/
918
919static bool team_port_find(const struct team *team,
920 const struct team_port *port)
921{
922 struct team_port *cur;
923
924 list_for_each_entry(cur, &team->port_list, list)
925 if (cur == port)
926 return true;
927 return false;
928}
929
930/*
931 * Enable/disable port by adding to enabled port hashlist and setting
932 * port->index (Might be racy so reader could see incorrect ifindex when
933 * processing a flying packet, but that is not a problem). Write guarded
934 * by team->lock.
935 */
936static void team_port_enable(struct team *team,
937 struct team_port *port)
938{
939 if (team_port_enabled(port))
940 return;
941 port->index = team->en_port_count++;
942 hlist_add_head_rcu(&port->hlist,
943 team_port_index_hash(team, port->index));
944 team_adjust_ops(team);
945 team_queue_override_port_add(team, port);
946 if (team->ops.port_enabled)
947 team->ops.port_enabled(team, port);
948 team_notify_peers(team);
949 team_mcast_rejoin(team);
950 team_lower_state_changed(port);
951}
952
953static void __reconstruct_port_hlist(struct team *team, int rm_index)
954{
955 int i;
956 struct team_port *port;
957
958 for (i = rm_index + 1; i < team->en_port_count; i++) {
959 port = team_get_port_by_index(team, i);
960 hlist_del_rcu(&port->hlist);
961 port->index--;
962 hlist_add_head_rcu(&port->hlist,
963 team_port_index_hash(team, port->index));
964 }
965}
966
967static void team_port_disable(struct team *team,
968 struct team_port *port)
969{
970 if (!team_port_enabled(port))
971 return;
972 if (team->ops.port_disabled)
973 team->ops.port_disabled(team, port);
974 hlist_del_rcu(&port->hlist);
975 __reconstruct_port_hlist(team, port->index);
976 port->index = -1;
977 team->en_port_count--;
978 team_queue_override_port_del(team, port);
979 team_adjust_ops(team);
980 team_lower_state_changed(port);
981}
982
983#define TEAM_VLAN_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
984 NETIF_F_FRAGLIST | NETIF_F_GSO_SOFTWARE | \
985 NETIF_F_HIGHDMA | NETIF_F_LRO)
986
987#define TEAM_ENC_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
988 NETIF_F_RXCSUM | NETIF_F_GSO_SOFTWARE)
989
990static void __team_compute_features(struct team *team)
991{
992 struct team_port *port;
993 netdev_features_t vlan_features = TEAM_VLAN_FEATURES &
994 NETIF_F_ALL_FOR_ALL;
995 netdev_features_t enc_features = TEAM_ENC_FEATURES;
996 unsigned short max_hard_header_len = ETH_HLEN;
997 unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE |
998 IFF_XMIT_DST_RELEASE_PERM;
999
1000 rcu_read_lock();
1001 list_for_each_entry_rcu(port, &team->port_list, list) {
1002 vlan_features = netdev_increment_features(vlan_features,
1003 port->dev->vlan_features,
1004 TEAM_VLAN_FEATURES);
1005 enc_features =
1006 netdev_increment_features(enc_features,
1007 port->dev->hw_enc_features,
1008 TEAM_ENC_FEATURES);
1009
1010
1011 dst_release_flag &= port->dev->priv_flags;
1012 if (port->dev->hard_header_len > max_hard_header_len)
1013 max_hard_header_len = port->dev->hard_header_len;
1014 }
1015 rcu_read_unlock();
1016
1017 team->dev->vlan_features = vlan_features;
1018 team->dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL |
1019 NETIF_F_HW_VLAN_CTAG_TX |
1020 NETIF_F_HW_VLAN_STAG_TX;
1021 team->dev->hard_header_len = max_hard_header_len;
1022
1023 team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
1024 if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
1025 team->dev->priv_flags |= IFF_XMIT_DST_RELEASE;
1026}
1027
1028static void team_compute_features(struct team *team)
1029{
1030 __team_compute_features(team);
1031 netdev_change_features(team->dev);
1032}
1033
1034static int team_port_enter(struct team *team, struct team_port *port)
1035{
1036 int err = 0;
1037
1038 dev_hold(team->dev);
1039 if (team->ops.port_enter) {
1040 err = team->ops.port_enter(team, port);
1041 if (err) {
1042 netdev_err(team->dev, "Device %s failed to enter team mode\n",
1043 port->dev->name);
1044 goto err_port_enter;
1045 }
1046 }
1047
1048 return 0;
1049
1050err_port_enter:
1051 dev_put(team->dev);
1052
1053 return err;
1054}
1055
1056static void team_port_leave(struct team *team, struct team_port *port)
1057{
1058 if (team->ops.port_leave)
1059 team->ops.port_leave(team, port);
1060 dev_put(team->dev);
1061}
1062
1063#ifdef CONFIG_NET_POLL_CONTROLLER
1064static int __team_port_enable_netpoll(struct team_port *port)
1065{
1066 struct netpoll *np;
1067 int err;
1068
1069 np = kzalloc(sizeof(*np), GFP_KERNEL);
1070 if (!np)
1071 return -ENOMEM;
1072
1073 err = __netpoll_setup(np, port->dev);
1074 if (err) {
1075 kfree(np);
1076 return err;
1077 }
1078 port->np = np;
1079 return err;
1080}
1081
1082static int team_port_enable_netpoll(struct team_port *port)
1083{
1084 if (!port->team->dev->npinfo)
1085 return 0;
1086
1087 return __team_port_enable_netpoll(port);
1088}
1089
1090static void team_port_disable_netpoll(struct team_port *port)
1091{
1092 struct netpoll *np = port->np;
1093
1094 if (!np)
1095 return;
1096 port->np = NULL;
1097
1098 __netpoll_free(np);
1099}
1100#else
1101static int team_port_enable_netpoll(struct team_port *port)
1102{
1103 return 0;
1104}
1105static void team_port_disable_netpoll(struct team_port *port)
1106{
1107}
1108#endif
1109
1110static int team_upper_dev_link(struct team *team, struct team_port *port,
1111 struct netlink_ext_ack *extack)
1112{
1113 struct netdev_lag_upper_info lag_upper_info;
1114 int err;
1115
1116 lag_upper_info.tx_type = team->mode->lag_tx_type;
1117 lag_upper_info.hash_type = NETDEV_LAG_HASH_UNKNOWN;
1118 err = netdev_master_upper_dev_link(port->dev, team->dev, NULL,
1119 &lag_upper_info, extack);
1120 if (err)
1121 return err;
1122 port->dev->priv_flags |= IFF_TEAM_PORT;
1123 return 0;
1124}
1125
1126static void team_upper_dev_unlink(struct team *team, struct team_port *port)
1127{
1128 netdev_upper_dev_unlink(port->dev, team->dev);
1129 port->dev->priv_flags &= ~IFF_TEAM_PORT;
1130}
1131
1132static void __team_port_change_port_added(struct team_port *port, bool linkup);
1133static int team_dev_type_check_change(struct net_device *dev,
1134 struct net_device *port_dev);
1135
1136static int team_port_add(struct team *team, struct net_device *port_dev,
1137 struct netlink_ext_ack *extack)
1138{
1139 struct net_device *dev = team->dev;
1140 struct team_port *port;
1141 char *portname = port_dev->name;
1142 int err;
1143
1144 if (port_dev->flags & IFF_LOOPBACK) {
1145 NL_SET_ERR_MSG(extack, "Loopback device can't be added as a team port");
1146 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1147 portname);
1148 return -EINVAL;
1149 }
1150
1151 if (netif_is_team_port(port_dev)) {
1152 NL_SET_ERR_MSG(extack, "Device is already a port of a team device");
1153 netdev_err(dev, "Device %s is already a port "
1154 "of a team device\n", portname);
1155 return -EBUSY;
1156 }
1157
1158 if (dev == port_dev) {
1159 NL_SET_ERR_MSG(extack, "Cannot enslave team device to itself");
1160 netdev_err(dev, "Cannot enslave team device to itself\n");
1161 return -EINVAL;
1162 }
1163
1164 if (netdev_has_upper_dev(dev, port_dev)) {
1165 NL_SET_ERR_MSG(extack, "Device is already an upper device of the team interface");
1166 netdev_err(dev, "Device %s is already an upper device of the team interface\n",
1167 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, extack);
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 /* set promiscuity level to new slave */
1262 if (dev->flags & IFF_PROMISC) {
1263 err = dev_set_promiscuity(port_dev, 1);
1264 if (err)
1265 goto err_set_slave_promisc;
1266 }
1267
1268 /* set allmulti level to new slave */
1269 if (dev->flags & IFF_ALLMULTI) {
1270 err = dev_set_allmulti(port_dev, 1);
1271 if (err) {
1272 if (dev->flags & IFF_PROMISC)
1273 dev_set_promiscuity(port_dev, -1);
1274 goto err_set_slave_promisc;
1275 }
1276 }
1277
1278 if (dev->flags & IFF_UP) {
1279 netif_addr_lock_bh(dev);
1280 dev_uc_sync_multiple(port_dev, dev);
1281 dev_mc_sync_multiple(port_dev, dev);
1282 netif_addr_unlock_bh(dev);
1283 }
1284
1285 port->index = -1;
1286 list_add_tail_rcu(&port->list, &team->port_list);
1287 team_port_enable(team, port);
1288 __team_compute_features(team);
1289 __team_port_change_port_added(port, !!netif_oper_up(port_dev));
1290 __team_options_change_check(team);
1291
1292 netdev_info(dev, "Port device %s added\n", portname);
1293
1294 return 0;
1295
1296err_set_slave_promisc:
1297 __team_option_inst_del_port(team, port);
1298
1299err_option_port_add:
1300 team_upper_dev_unlink(team, port);
1301
1302err_set_upper_link:
1303 netdev_rx_handler_unregister(port_dev);
1304
1305err_handler_register:
1306 team_port_disable_netpoll(port);
1307
1308err_enable_netpoll:
1309 vlan_vids_del_by_dev(port_dev, dev);
1310
1311err_vids_add:
1312 dev_close(port_dev);
1313
1314err_dev_open:
1315 team_port_leave(team, port);
1316 team_port_set_orig_dev_addr(port);
1317
1318err_port_enter:
1319 dev_set_mtu(port_dev, port->orig.mtu);
1320
1321err_set_mtu:
1322 kfree(port);
1323
1324 return err;
1325}
1326
1327static void __team_port_change_port_removed(struct team_port *port);
1328
1329static int team_port_del(struct team *team, struct net_device *port_dev)
1330{
1331 struct net_device *dev = team->dev;
1332 struct team_port *port;
1333 char *portname = port_dev->name;
1334
1335 port = team_port_get_rtnl(port_dev);
1336 if (!port || !team_port_find(team, port)) {
1337 netdev_err(dev, "Device %s does not act as a port of this team\n",
1338 portname);
1339 return -ENOENT;
1340 }
1341
1342 team_port_disable(team, port);
1343 list_del_rcu(&port->list);
1344
1345 if (dev->flags & IFF_PROMISC)
1346 dev_set_promiscuity(port_dev, -1);
1347 if (dev->flags & IFF_ALLMULTI)
1348 dev_set_allmulti(port_dev, -1);
1349
1350 team_upper_dev_unlink(team, port);
1351 netdev_rx_handler_unregister(port_dev);
1352 team_port_disable_netpoll(port);
1353 vlan_vids_del_by_dev(port_dev, dev);
1354 if (dev->flags & IFF_UP) {
1355 dev_uc_unsync(port_dev, dev);
1356 dev_mc_unsync(port_dev, dev);
1357 }
1358 dev_close(port_dev);
1359 team_port_leave(team, port);
1360
1361 __team_option_inst_mark_removed_port(team, port);
1362 __team_options_change_check(team);
1363 __team_option_inst_del_port(team, port);
1364 __team_port_change_port_removed(port);
1365
1366 team_port_set_orig_dev_addr(port);
1367 dev_set_mtu(port_dev, port->orig.mtu);
1368 kfree_rcu(port, rcu);
1369 netdev_info(dev, "Port device %s removed\n", portname);
1370 __team_compute_features(team);
1371
1372 return 0;
1373}
1374
1375
1376/*****************
1377 * Net device ops
1378 *****************/
1379
1380static void team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1381{
1382 ctx->data.str_val = team->mode->kind;
1383}
1384
1385static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1386{
1387 return team_change_mode(team, ctx->data.str_val);
1388}
1389
1390static void team_notify_peers_count_get(struct team *team,
1391 struct team_gsetter_ctx *ctx)
1392{
1393 ctx->data.u32_val = team->notify_peers.count;
1394}
1395
1396static int team_notify_peers_count_set(struct team *team,
1397 struct team_gsetter_ctx *ctx)
1398{
1399 team->notify_peers.count = ctx->data.u32_val;
1400 return 0;
1401}
1402
1403static void team_notify_peers_interval_get(struct team *team,
1404 struct team_gsetter_ctx *ctx)
1405{
1406 ctx->data.u32_val = team->notify_peers.interval;
1407}
1408
1409static int team_notify_peers_interval_set(struct team *team,
1410 struct team_gsetter_ctx *ctx)
1411{
1412 team->notify_peers.interval = ctx->data.u32_val;
1413 return 0;
1414}
1415
1416static void team_mcast_rejoin_count_get(struct team *team,
1417 struct team_gsetter_ctx *ctx)
1418{
1419 ctx->data.u32_val = team->mcast_rejoin.count;
1420}
1421
1422static int team_mcast_rejoin_count_set(struct team *team,
1423 struct team_gsetter_ctx *ctx)
1424{
1425 team->mcast_rejoin.count = ctx->data.u32_val;
1426 return 0;
1427}
1428
1429static void team_mcast_rejoin_interval_get(struct team *team,
1430 struct team_gsetter_ctx *ctx)
1431{
1432 ctx->data.u32_val = team->mcast_rejoin.interval;
1433}
1434
1435static int team_mcast_rejoin_interval_set(struct team *team,
1436 struct team_gsetter_ctx *ctx)
1437{
1438 team->mcast_rejoin.interval = ctx->data.u32_val;
1439 return 0;
1440}
1441
1442static void team_port_en_option_get(struct team *team,
1443 struct team_gsetter_ctx *ctx)
1444{
1445 struct team_port *port = ctx->info->port;
1446
1447 ctx->data.bool_val = team_port_enabled(port);
1448}
1449
1450static int team_port_en_option_set(struct team *team,
1451 struct team_gsetter_ctx *ctx)
1452{
1453 struct team_port *port = ctx->info->port;
1454
1455 if (ctx->data.bool_val)
1456 team_port_enable(team, port);
1457 else
1458 team_port_disable(team, port);
1459 return 0;
1460}
1461
1462static void team_user_linkup_option_get(struct team *team,
1463 struct team_gsetter_ctx *ctx)
1464{
1465 struct team_port *port = ctx->info->port;
1466
1467 ctx->data.bool_val = port->user.linkup;
1468}
1469
1470static void __team_carrier_check(struct team *team);
1471
1472static int team_user_linkup_option_set(struct team *team,
1473 struct team_gsetter_ctx *ctx)
1474{
1475 struct team_port *port = ctx->info->port;
1476
1477 port->user.linkup = ctx->data.bool_val;
1478 team_refresh_port_linkup(port);
1479 __team_carrier_check(port->team);
1480 return 0;
1481}
1482
1483static void team_user_linkup_en_option_get(struct team *team,
1484 struct team_gsetter_ctx *ctx)
1485{
1486 struct team_port *port = ctx->info->port;
1487
1488 ctx->data.bool_val = port->user.linkup_enabled;
1489}
1490
1491static int team_user_linkup_en_option_set(struct team *team,
1492 struct team_gsetter_ctx *ctx)
1493{
1494 struct team_port *port = ctx->info->port;
1495
1496 port->user.linkup_enabled = ctx->data.bool_val;
1497 team_refresh_port_linkup(port);
1498 __team_carrier_check(port->team);
1499 return 0;
1500}
1501
1502static void team_priority_option_get(struct team *team,
1503 struct team_gsetter_ctx *ctx)
1504{
1505 struct team_port *port = ctx->info->port;
1506
1507 ctx->data.s32_val = port->priority;
1508}
1509
1510static int team_priority_option_set(struct team *team,
1511 struct team_gsetter_ctx *ctx)
1512{
1513 struct team_port *port = ctx->info->port;
1514 s32 priority = ctx->data.s32_val;
1515
1516 if (port->priority == priority)
1517 return 0;
1518 port->priority = priority;
1519 team_queue_override_port_prio_changed(team, port);
1520 return 0;
1521}
1522
1523static void team_queue_id_option_get(struct team *team,
1524 struct team_gsetter_ctx *ctx)
1525{
1526 struct team_port *port = ctx->info->port;
1527
1528 ctx->data.u32_val = port->queue_id;
1529}
1530
1531static int team_queue_id_option_set(struct team *team,
1532 struct team_gsetter_ctx *ctx)
1533{
1534 struct team_port *port = ctx->info->port;
1535 u16 new_queue_id = ctx->data.u32_val;
1536
1537 if (port->queue_id == new_queue_id)
1538 return 0;
1539 if (new_queue_id >= team->dev->real_num_tx_queues)
1540 return -EINVAL;
1541 team_queue_override_port_change_queue_id(team, port, new_queue_id);
1542 return 0;
1543}
1544
1545static const struct team_option team_options[] = {
1546 {
1547 .name = "mode",
1548 .type = TEAM_OPTION_TYPE_STRING,
1549 .getter = team_mode_option_get,
1550 .setter = team_mode_option_set,
1551 },
1552 {
1553 .name = "notify_peers_count",
1554 .type = TEAM_OPTION_TYPE_U32,
1555 .getter = team_notify_peers_count_get,
1556 .setter = team_notify_peers_count_set,
1557 },
1558 {
1559 .name = "notify_peers_interval",
1560 .type = TEAM_OPTION_TYPE_U32,
1561 .getter = team_notify_peers_interval_get,
1562 .setter = team_notify_peers_interval_set,
1563 },
1564 {
1565 .name = "mcast_rejoin_count",
1566 .type = TEAM_OPTION_TYPE_U32,
1567 .getter = team_mcast_rejoin_count_get,
1568 .setter = team_mcast_rejoin_count_set,
1569 },
1570 {
1571 .name = "mcast_rejoin_interval",
1572 .type = TEAM_OPTION_TYPE_U32,
1573 .getter = team_mcast_rejoin_interval_get,
1574 .setter = team_mcast_rejoin_interval_set,
1575 },
1576 {
1577 .name = "enabled",
1578 .type = TEAM_OPTION_TYPE_BOOL,
1579 .per_port = true,
1580 .getter = team_port_en_option_get,
1581 .setter = team_port_en_option_set,
1582 },
1583 {
1584 .name = "user_linkup",
1585 .type = TEAM_OPTION_TYPE_BOOL,
1586 .per_port = true,
1587 .getter = team_user_linkup_option_get,
1588 .setter = team_user_linkup_option_set,
1589 },
1590 {
1591 .name = "user_linkup_enabled",
1592 .type = TEAM_OPTION_TYPE_BOOL,
1593 .per_port = true,
1594 .getter = team_user_linkup_en_option_get,
1595 .setter = team_user_linkup_en_option_set,
1596 },
1597 {
1598 .name = "priority",
1599 .type = TEAM_OPTION_TYPE_S32,
1600 .per_port = true,
1601 .getter = team_priority_option_get,
1602 .setter = team_priority_option_set,
1603 },
1604 {
1605 .name = "queue_id",
1606 .type = TEAM_OPTION_TYPE_U32,
1607 .per_port = true,
1608 .getter = team_queue_id_option_get,
1609 .setter = team_queue_id_option_set,
1610 },
1611};
1612
1613
1614static int team_init(struct net_device *dev)
1615{
1616 struct team *team = netdev_priv(dev);
1617 int i;
1618 int err;
1619
1620 team->dev = dev;
1621 team_set_no_mode(team);
1622 team->notifier_ctx = false;
1623
1624 team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1625 if (!team->pcpu_stats)
1626 return -ENOMEM;
1627
1628 for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1629 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1630 INIT_LIST_HEAD(&team->port_list);
1631 err = team_queue_override_init(team);
1632 if (err)
1633 goto err_team_queue_override_init;
1634
1635 team_adjust_ops(team);
1636
1637 INIT_LIST_HEAD(&team->option_list);
1638 INIT_LIST_HEAD(&team->option_inst_list);
1639
1640 team_notify_peers_init(team);
1641 team_mcast_rejoin_init(team);
1642
1643 err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1644 if (err)
1645 goto err_options_register;
1646 netif_carrier_off(dev);
1647
1648 lockdep_register_key(&team->team_lock_key);
1649 __mutex_init(&team->lock, "team->team_lock_key", &team->team_lock_key);
1650 netdev_lockdep_set_classes(dev);
1651
1652 return 0;
1653
1654err_options_register:
1655 team_mcast_rejoin_fini(team);
1656 team_notify_peers_fini(team);
1657 team_queue_override_fini(team);
1658err_team_queue_override_init:
1659 free_percpu(team->pcpu_stats);
1660
1661 return err;
1662}
1663
1664static void team_uninit(struct net_device *dev)
1665{
1666 struct team *team = netdev_priv(dev);
1667 struct team_port *port;
1668 struct team_port *tmp;
1669
1670 mutex_lock(&team->lock);
1671 list_for_each_entry_safe(port, tmp, &team->port_list, list)
1672 team_port_del(team, port->dev);
1673
1674 __team_change_mode(team, NULL); /* cleanup */
1675 __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1676 team_mcast_rejoin_fini(team);
1677 team_notify_peers_fini(team);
1678 team_queue_override_fini(team);
1679 mutex_unlock(&team->lock);
1680 netdev_change_features(dev);
1681 lockdep_unregister_key(&team->team_lock_key);
1682}
1683
1684static void team_destructor(struct net_device *dev)
1685{
1686 struct team *team = netdev_priv(dev);
1687
1688 free_percpu(team->pcpu_stats);
1689}
1690
1691static int team_open(struct net_device *dev)
1692{
1693 return 0;
1694}
1695
1696static int team_close(struct net_device *dev)
1697{
1698 struct team *team = netdev_priv(dev);
1699 struct team_port *port;
1700
1701 list_for_each_entry(port, &team->port_list, list) {
1702 dev_uc_unsync(port->dev, dev);
1703 dev_mc_unsync(port->dev, dev);
1704 }
1705
1706 return 0;
1707}
1708
1709/*
1710 * note: already called with rcu_read_lock
1711 */
1712static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1713{
1714 struct team *team = netdev_priv(dev);
1715 bool tx_success;
1716 unsigned int len = skb->len;
1717
1718 tx_success = team_queue_override_transmit(team, skb);
1719 if (!tx_success)
1720 tx_success = team->ops.transmit(team, skb);
1721 if (tx_success) {
1722 struct team_pcpu_stats *pcpu_stats;
1723
1724 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1725 u64_stats_update_begin(&pcpu_stats->syncp);
1726 u64_stats_inc(&pcpu_stats->tx_packets);
1727 u64_stats_add(&pcpu_stats->tx_bytes, len);
1728 u64_stats_update_end(&pcpu_stats->syncp);
1729 } else {
1730 this_cpu_inc(team->pcpu_stats->tx_dropped);
1731 }
1732
1733 return NETDEV_TX_OK;
1734}
1735
1736static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1737 struct net_device *sb_dev)
1738{
1739 /*
1740 * This helper function exists to help dev_pick_tx get the correct
1741 * destination queue. Using a helper function skips a call to
1742 * skb_tx_hash and will put the skbs in the queue we expect on their
1743 * way down to the team driver.
1744 */
1745 u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1746
1747 /*
1748 * Save the original txq to restore before passing to the driver
1749 */
1750 qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1751
1752 if (unlikely(txq >= dev->real_num_tx_queues)) {
1753 do {
1754 txq -= dev->real_num_tx_queues;
1755 } while (txq >= dev->real_num_tx_queues);
1756 }
1757 return txq;
1758}
1759
1760static void team_change_rx_flags(struct net_device *dev, int change)
1761{
1762 struct team *team = netdev_priv(dev);
1763 struct team_port *port;
1764 int inc;
1765
1766 rcu_read_lock();
1767 list_for_each_entry_rcu(port, &team->port_list, list) {
1768 if (change & IFF_PROMISC) {
1769 inc = dev->flags & IFF_PROMISC ? 1 : -1;
1770 dev_set_promiscuity(port->dev, inc);
1771 }
1772 if (change & IFF_ALLMULTI) {
1773 inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1774 dev_set_allmulti(port->dev, inc);
1775 }
1776 }
1777 rcu_read_unlock();
1778}
1779
1780static void team_set_rx_mode(struct net_device *dev)
1781{
1782 struct team *team = netdev_priv(dev);
1783 struct team_port *port;
1784
1785 rcu_read_lock();
1786 list_for_each_entry_rcu(port, &team->port_list, list) {
1787 dev_uc_sync_multiple(port->dev, dev);
1788 dev_mc_sync_multiple(port->dev, dev);
1789 }
1790 rcu_read_unlock();
1791}
1792
1793static int team_set_mac_address(struct net_device *dev, void *p)
1794{
1795 struct sockaddr *addr = p;
1796 struct team *team = netdev_priv(dev);
1797 struct team_port *port;
1798
1799 if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1800 return -EADDRNOTAVAIL;
1801 dev_addr_set(dev, addr->sa_data);
1802 mutex_lock(&team->lock);
1803 list_for_each_entry(port, &team->port_list, list)
1804 if (team->ops.port_change_dev_addr)
1805 team->ops.port_change_dev_addr(team, port);
1806 mutex_unlock(&team->lock);
1807 return 0;
1808}
1809
1810static int team_change_mtu(struct net_device *dev, int new_mtu)
1811{
1812 struct team *team = netdev_priv(dev);
1813 struct team_port *port;
1814 int err;
1815
1816 /*
1817 * Alhough this is reader, it's guarded by team lock. It's not possible
1818 * to traverse list in reverse under rcu_read_lock
1819 */
1820 mutex_lock(&team->lock);
1821 team->port_mtu_change_allowed = true;
1822 list_for_each_entry(port, &team->port_list, list) {
1823 err = dev_set_mtu(port->dev, new_mtu);
1824 if (err) {
1825 netdev_err(dev, "Device %s failed to change mtu",
1826 port->dev->name);
1827 goto unwind;
1828 }
1829 }
1830 team->port_mtu_change_allowed = false;
1831 mutex_unlock(&team->lock);
1832
1833 dev->mtu = new_mtu;
1834
1835 return 0;
1836
1837unwind:
1838 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1839 dev_set_mtu(port->dev, dev->mtu);
1840 team->port_mtu_change_allowed = false;
1841 mutex_unlock(&team->lock);
1842
1843 return err;
1844}
1845
1846static void
1847team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1848{
1849 struct team *team = netdev_priv(dev);
1850 struct team_pcpu_stats *p;
1851 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1852 u32 rx_dropped = 0, tx_dropped = 0, rx_nohandler = 0;
1853 unsigned int start;
1854 int i;
1855
1856 for_each_possible_cpu(i) {
1857 p = per_cpu_ptr(team->pcpu_stats, i);
1858 do {
1859 start = u64_stats_fetch_begin(&p->syncp);
1860 rx_packets = u64_stats_read(&p->rx_packets);
1861 rx_bytes = u64_stats_read(&p->rx_bytes);
1862 rx_multicast = u64_stats_read(&p->rx_multicast);
1863 tx_packets = u64_stats_read(&p->tx_packets);
1864 tx_bytes = u64_stats_read(&p->tx_bytes);
1865 } while (u64_stats_fetch_retry(&p->syncp, start));
1866
1867 stats->rx_packets += rx_packets;
1868 stats->rx_bytes += rx_bytes;
1869 stats->multicast += rx_multicast;
1870 stats->tx_packets += tx_packets;
1871 stats->tx_bytes += tx_bytes;
1872 /*
1873 * rx_dropped, tx_dropped & rx_nohandler are u32,
1874 * updated without syncp protection.
1875 */
1876 rx_dropped += READ_ONCE(p->rx_dropped);
1877 tx_dropped += READ_ONCE(p->tx_dropped);
1878 rx_nohandler += READ_ONCE(p->rx_nohandler);
1879 }
1880 stats->rx_dropped = rx_dropped;
1881 stats->tx_dropped = tx_dropped;
1882 stats->rx_nohandler = rx_nohandler;
1883}
1884
1885static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1886{
1887 struct team *team = netdev_priv(dev);
1888 struct team_port *port;
1889 int err;
1890
1891 /*
1892 * Alhough this is reader, it's guarded by team lock. It's not possible
1893 * to traverse list in reverse under rcu_read_lock
1894 */
1895 mutex_lock(&team->lock);
1896 list_for_each_entry(port, &team->port_list, list) {
1897 err = vlan_vid_add(port->dev, proto, vid);
1898 if (err)
1899 goto unwind;
1900 }
1901 mutex_unlock(&team->lock);
1902
1903 return 0;
1904
1905unwind:
1906 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1907 vlan_vid_del(port->dev, proto, vid);
1908 mutex_unlock(&team->lock);
1909
1910 return err;
1911}
1912
1913static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1914{
1915 struct team *team = netdev_priv(dev);
1916 struct team_port *port;
1917
1918 mutex_lock(&team->lock);
1919 list_for_each_entry(port, &team->port_list, list)
1920 vlan_vid_del(port->dev, proto, vid);
1921 mutex_unlock(&team->lock);
1922
1923 return 0;
1924}
1925
1926#ifdef CONFIG_NET_POLL_CONTROLLER
1927static void team_poll_controller(struct net_device *dev)
1928{
1929}
1930
1931static void __team_netpoll_cleanup(struct team *team)
1932{
1933 struct team_port *port;
1934
1935 list_for_each_entry(port, &team->port_list, list)
1936 team_port_disable_netpoll(port);
1937}
1938
1939static void team_netpoll_cleanup(struct net_device *dev)
1940{
1941 struct team *team = netdev_priv(dev);
1942
1943 mutex_lock(&team->lock);
1944 __team_netpoll_cleanup(team);
1945 mutex_unlock(&team->lock);
1946}
1947
1948static int team_netpoll_setup(struct net_device *dev,
1949 struct netpoll_info *npifo)
1950{
1951 struct team *team = netdev_priv(dev);
1952 struct team_port *port;
1953 int err = 0;
1954
1955 mutex_lock(&team->lock);
1956 list_for_each_entry(port, &team->port_list, list) {
1957 err = __team_port_enable_netpoll(port);
1958 if (err) {
1959 __team_netpoll_cleanup(team);
1960 break;
1961 }
1962 }
1963 mutex_unlock(&team->lock);
1964 return err;
1965}
1966#endif
1967
1968static int team_add_slave(struct net_device *dev, struct net_device *port_dev,
1969 struct netlink_ext_ack *extack)
1970{
1971 struct team *team = netdev_priv(dev);
1972 int err;
1973
1974 mutex_lock(&team->lock);
1975 err = team_port_add(team, port_dev, extack);
1976 mutex_unlock(&team->lock);
1977
1978 if (!err)
1979 netdev_change_features(dev);
1980
1981 return err;
1982}
1983
1984static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1985{
1986 struct team *team = netdev_priv(dev);
1987 int err;
1988
1989 mutex_lock(&team->lock);
1990 err = team_port_del(team, port_dev);
1991 mutex_unlock(&team->lock);
1992
1993 if (err)
1994 return err;
1995
1996 if (netif_is_team_master(port_dev)) {
1997 lockdep_unregister_key(&team->team_lock_key);
1998 lockdep_register_key(&team->team_lock_key);
1999 lockdep_set_class(&team->lock, &team->team_lock_key);
2000 }
2001 netdev_change_features(dev);
2002
2003 return err;
2004}
2005
2006static netdev_features_t team_fix_features(struct net_device *dev,
2007 netdev_features_t features)
2008{
2009 struct team_port *port;
2010 struct team *team = netdev_priv(dev);
2011 netdev_features_t mask;
2012
2013 mask = features;
2014 features &= ~NETIF_F_ONE_FOR_ALL;
2015 features |= NETIF_F_ALL_FOR_ALL;
2016
2017 rcu_read_lock();
2018 list_for_each_entry_rcu(port, &team->port_list, list) {
2019 features = netdev_increment_features(features,
2020 port->dev->features,
2021 mask);
2022 }
2023 rcu_read_unlock();
2024
2025 features = netdev_add_tso_features(features, mask);
2026
2027 return features;
2028}
2029
2030static int team_change_carrier(struct net_device *dev, bool new_carrier)
2031{
2032 struct team *team = netdev_priv(dev);
2033
2034 team->user_carrier_enabled = true;
2035
2036 if (new_carrier)
2037 netif_carrier_on(dev);
2038 else
2039 netif_carrier_off(dev);
2040 return 0;
2041}
2042
2043static const struct net_device_ops team_netdev_ops = {
2044 .ndo_init = team_init,
2045 .ndo_uninit = team_uninit,
2046 .ndo_open = team_open,
2047 .ndo_stop = team_close,
2048 .ndo_start_xmit = team_xmit,
2049 .ndo_select_queue = team_select_queue,
2050 .ndo_change_rx_flags = team_change_rx_flags,
2051 .ndo_set_rx_mode = team_set_rx_mode,
2052 .ndo_set_mac_address = team_set_mac_address,
2053 .ndo_change_mtu = team_change_mtu,
2054 .ndo_get_stats64 = team_get_stats64,
2055 .ndo_vlan_rx_add_vid = team_vlan_rx_add_vid,
2056 .ndo_vlan_rx_kill_vid = team_vlan_rx_kill_vid,
2057#ifdef CONFIG_NET_POLL_CONTROLLER
2058 .ndo_poll_controller = team_poll_controller,
2059 .ndo_netpoll_setup = team_netpoll_setup,
2060 .ndo_netpoll_cleanup = team_netpoll_cleanup,
2061#endif
2062 .ndo_add_slave = team_add_slave,
2063 .ndo_del_slave = team_del_slave,
2064 .ndo_fix_features = team_fix_features,
2065 .ndo_change_carrier = team_change_carrier,
2066 .ndo_features_check = passthru_features_check,
2067};
2068
2069/***********************
2070 * ethtool interface
2071 ***********************/
2072
2073static void team_ethtool_get_drvinfo(struct net_device *dev,
2074 struct ethtool_drvinfo *drvinfo)
2075{
2076 strscpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
2077 strscpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2078}
2079
2080static int team_ethtool_get_link_ksettings(struct net_device *dev,
2081 struct ethtool_link_ksettings *cmd)
2082{
2083 struct team *team= netdev_priv(dev);
2084 unsigned long speed = 0;
2085 struct team_port *port;
2086
2087 cmd->base.duplex = DUPLEX_UNKNOWN;
2088 cmd->base.port = PORT_OTHER;
2089
2090 rcu_read_lock();
2091 list_for_each_entry_rcu(port, &team->port_list, list) {
2092 if (team_port_txable(port)) {
2093 if (port->state.speed != SPEED_UNKNOWN)
2094 speed += port->state.speed;
2095 if (cmd->base.duplex == DUPLEX_UNKNOWN &&
2096 port->state.duplex != DUPLEX_UNKNOWN)
2097 cmd->base.duplex = port->state.duplex;
2098 }
2099 }
2100 rcu_read_unlock();
2101
2102 cmd->base.speed = speed ? : SPEED_UNKNOWN;
2103
2104 return 0;
2105}
2106
2107static const struct ethtool_ops team_ethtool_ops = {
2108 .get_drvinfo = team_ethtool_get_drvinfo,
2109 .get_link = ethtool_op_get_link,
2110 .get_link_ksettings = team_ethtool_get_link_ksettings,
2111};
2112
2113/***********************
2114 * rt netlink interface
2115 ***********************/
2116
2117static void team_setup_by_port(struct net_device *dev,
2118 struct net_device *port_dev)
2119{
2120 struct team *team = netdev_priv(dev);
2121
2122 if (port_dev->type == ARPHRD_ETHER)
2123 dev->header_ops = team->header_ops_cache;
2124 else
2125 dev->header_ops = port_dev->header_ops;
2126 dev->type = port_dev->type;
2127 dev->hard_header_len = port_dev->hard_header_len;
2128 dev->needed_headroom = port_dev->needed_headroom;
2129 dev->addr_len = port_dev->addr_len;
2130 dev->mtu = port_dev->mtu;
2131 memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2132 eth_hw_addr_inherit(dev, port_dev);
2133
2134 if (port_dev->flags & IFF_POINTOPOINT) {
2135 dev->flags &= ~(IFF_BROADCAST | IFF_MULTICAST);
2136 dev->flags |= (IFF_POINTOPOINT | IFF_NOARP);
2137 } else if ((port_dev->flags & (IFF_BROADCAST | IFF_MULTICAST)) ==
2138 (IFF_BROADCAST | IFF_MULTICAST)) {
2139 dev->flags |= (IFF_BROADCAST | IFF_MULTICAST);
2140 dev->flags &= ~(IFF_POINTOPOINT | IFF_NOARP);
2141 }
2142}
2143
2144static int team_dev_type_check_change(struct net_device *dev,
2145 struct net_device *port_dev)
2146{
2147 struct team *team = netdev_priv(dev);
2148 char *portname = port_dev->name;
2149 int err;
2150
2151 if (dev->type == port_dev->type)
2152 return 0;
2153 if (!list_empty(&team->port_list)) {
2154 netdev_err(dev, "Device %s is of different type\n", portname);
2155 return -EBUSY;
2156 }
2157 err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2158 err = notifier_to_errno(err);
2159 if (err) {
2160 netdev_err(dev, "Refused to change device type\n");
2161 return err;
2162 }
2163 dev_uc_flush(dev);
2164 dev_mc_flush(dev);
2165 team_setup_by_port(dev, port_dev);
2166 call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2167 return 0;
2168}
2169
2170static void team_setup(struct net_device *dev)
2171{
2172 struct team *team = netdev_priv(dev);
2173
2174 ether_setup(dev);
2175 dev->max_mtu = ETH_MAX_MTU;
2176 team->header_ops_cache = dev->header_ops;
2177
2178 dev->netdev_ops = &team_netdev_ops;
2179 dev->ethtool_ops = &team_ethtool_ops;
2180 dev->needs_free_netdev = true;
2181 dev->priv_destructor = team_destructor;
2182 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2183 dev->priv_flags |= IFF_NO_QUEUE;
2184 dev->priv_flags |= IFF_TEAM;
2185
2186 /*
2187 * Indicate we support unicast address filtering. That way core won't
2188 * bring us to promisc mode in case a unicast addr is added.
2189 * Let this up to underlay drivers.
2190 */
2191 dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2192
2193 dev->features |= NETIF_F_LLTX;
2194 dev->features |= NETIF_F_GRO;
2195
2196 /* Don't allow team devices to change network namespaces. */
2197 dev->features |= NETIF_F_NETNS_LOCAL;
2198
2199 dev->hw_features = TEAM_VLAN_FEATURES |
2200 NETIF_F_HW_VLAN_CTAG_RX |
2201 NETIF_F_HW_VLAN_CTAG_FILTER |
2202 NETIF_F_HW_VLAN_STAG_RX |
2203 NETIF_F_HW_VLAN_STAG_FILTER;
2204
2205 dev->hw_features |= NETIF_F_GSO_ENCAP_ALL;
2206 dev->features |= dev->hw_features;
2207 dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
2208}
2209
2210static int team_newlink(struct net *src_net, struct net_device *dev,
2211 struct nlattr *tb[], struct nlattr *data[],
2212 struct netlink_ext_ack *extack)
2213{
2214 if (tb[IFLA_ADDRESS] == NULL)
2215 eth_hw_addr_random(dev);
2216
2217 return register_netdevice(dev);
2218}
2219
2220static int team_validate(struct nlattr *tb[], struct nlattr *data[],
2221 struct netlink_ext_ack *extack)
2222{
2223 if (tb[IFLA_ADDRESS]) {
2224 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2225 return -EINVAL;
2226 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2227 return -EADDRNOTAVAIL;
2228 }
2229 return 0;
2230}
2231
2232static unsigned int team_get_num_tx_queues(void)
2233{
2234 return TEAM_DEFAULT_NUM_TX_QUEUES;
2235}
2236
2237static unsigned int team_get_num_rx_queues(void)
2238{
2239 return TEAM_DEFAULT_NUM_RX_QUEUES;
2240}
2241
2242static struct rtnl_link_ops team_link_ops __read_mostly = {
2243 .kind = DRV_NAME,
2244 .priv_size = sizeof(struct team),
2245 .setup = team_setup,
2246 .newlink = team_newlink,
2247 .validate = team_validate,
2248 .get_num_tx_queues = team_get_num_tx_queues,
2249 .get_num_rx_queues = team_get_num_rx_queues,
2250};
2251
2252
2253/***********************************
2254 * Generic netlink custom interface
2255 ***********************************/
2256
2257static struct genl_family team_nl_family;
2258
2259static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2260 [TEAM_ATTR_UNSPEC] = { .type = NLA_UNSPEC, },
2261 [TEAM_ATTR_TEAM_IFINDEX] = { .type = NLA_U32 },
2262 [TEAM_ATTR_LIST_OPTION] = { .type = NLA_NESTED },
2263 [TEAM_ATTR_LIST_PORT] = { .type = NLA_NESTED },
2264};
2265
2266static const struct nla_policy
2267team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2268 [TEAM_ATTR_OPTION_UNSPEC] = { .type = NLA_UNSPEC, },
2269 [TEAM_ATTR_OPTION_NAME] = {
2270 .type = NLA_STRING,
2271 .len = TEAM_STRING_MAX_LEN,
2272 },
2273 [TEAM_ATTR_OPTION_CHANGED] = { .type = NLA_FLAG },
2274 [TEAM_ATTR_OPTION_TYPE] = { .type = NLA_U8 },
2275 [TEAM_ATTR_OPTION_DATA] = { .type = NLA_BINARY },
2276 [TEAM_ATTR_OPTION_PORT_IFINDEX] = { .type = NLA_U32 },
2277 [TEAM_ATTR_OPTION_ARRAY_INDEX] = { .type = NLA_U32 },
2278};
2279
2280static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2281{
2282 struct sk_buff *msg;
2283 void *hdr;
2284 int err;
2285
2286 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2287 if (!msg)
2288 return -ENOMEM;
2289
2290 hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2291 &team_nl_family, 0, TEAM_CMD_NOOP);
2292 if (!hdr) {
2293 err = -EMSGSIZE;
2294 goto err_msg_put;
2295 }
2296
2297 genlmsg_end(msg, hdr);
2298
2299 return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2300
2301err_msg_put:
2302 nlmsg_free(msg);
2303
2304 return err;
2305}
2306
2307/*
2308 * Netlink cmd functions should be locked by following two functions.
2309 * Since dev gets held here, that ensures dev won't disappear in between.
2310 */
2311static struct team *team_nl_team_get(struct genl_info *info)
2312{
2313 struct net *net = genl_info_net(info);
2314 int ifindex;
2315 struct net_device *dev;
2316 struct team *team;
2317
2318 if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2319 return NULL;
2320
2321 ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2322 dev = dev_get_by_index(net, ifindex);
2323 if (!dev || dev->netdev_ops != &team_netdev_ops) {
2324 dev_put(dev);
2325 return NULL;
2326 }
2327
2328 team = netdev_priv(dev);
2329 mutex_lock(&team->lock);
2330 return team;
2331}
2332
2333static void team_nl_team_put(struct team *team)
2334{
2335 mutex_unlock(&team->lock);
2336 dev_put(team->dev);
2337}
2338
2339typedef int team_nl_send_func_t(struct sk_buff *skb,
2340 struct team *team, u32 portid);
2341
2342static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2343{
2344 return genlmsg_unicast(dev_net(team->dev), skb, portid);
2345}
2346
2347static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2348 struct team_option_inst *opt_inst)
2349{
2350 struct nlattr *option_item;
2351 struct team_option *option = opt_inst->option;
2352 struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2353 struct team_gsetter_ctx ctx;
2354 int err;
2355
2356 ctx.info = opt_inst_info;
2357 err = team_option_get(team, opt_inst, &ctx);
2358 if (err)
2359 return err;
2360
2361 option_item = nla_nest_start_noflag(skb, TEAM_ATTR_ITEM_OPTION);
2362 if (!option_item)
2363 return -EMSGSIZE;
2364
2365 if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2366 goto nest_cancel;
2367 if (opt_inst_info->port &&
2368 nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2369 opt_inst_info->port->dev->ifindex))
2370 goto nest_cancel;
2371 if (opt_inst->option->array_size &&
2372 nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2373 opt_inst_info->array_index))
2374 goto nest_cancel;
2375
2376 switch (option->type) {
2377 case TEAM_OPTION_TYPE_U32:
2378 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2379 goto nest_cancel;
2380 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2381 goto nest_cancel;
2382 break;
2383 case TEAM_OPTION_TYPE_STRING:
2384 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2385 goto nest_cancel;
2386 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2387 ctx.data.str_val))
2388 goto nest_cancel;
2389 break;
2390 case TEAM_OPTION_TYPE_BINARY:
2391 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2392 goto nest_cancel;
2393 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2394 ctx.data.bin_val.ptr))
2395 goto nest_cancel;
2396 break;
2397 case TEAM_OPTION_TYPE_BOOL:
2398 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2399 goto nest_cancel;
2400 if (ctx.data.bool_val &&
2401 nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2402 goto nest_cancel;
2403 break;
2404 case TEAM_OPTION_TYPE_S32:
2405 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2406 goto nest_cancel;
2407 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2408 goto nest_cancel;
2409 break;
2410 default:
2411 BUG();
2412 }
2413 if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2414 goto nest_cancel;
2415 if (opt_inst->changed) {
2416 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2417 goto nest_cancel;
2418 opt_inst->changed = false;
2419 }
2420 nla_nest_end(skb, option_item);
2421 return 0;
2422
2423nest_cancel:
2424 nla_nest_cancel(skb, option_item);
2425 return -EMSGSIZE;
2426}
2427
2428static int __send_and_alloc_skb(struct sk_buff **pskb,
2429 struct team *team, u32 portid,
2430 team_nl_send_func_t *send_func)
2431{
2432 int err;
2433
2434 if (*pskb) {
2435 err = send_func(*pskb, team, portid);
2436 if (err)
2437 return err;
2438 }
2439 *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2440 if (!*pskb)
2441 return -ENOMEM;
2442 return 0;
2443}
2444
2445static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2446 int flags, team_nl_send_func_t *send_func,
2447 struct list_head *sel_opt_inst_list)
2448{
2449 struct nlattr *option_list;
2450 struct nlmsghdr *nlh;
2451 void *hdr;
2452 struct team_option_inst *opt_inst;
2453 int err;
2454 struct sk_buff *skb = NULL;
2455 bool incomplete;
2456 int i;
2457
2458 opt_inst = list_first_entry(sel_opt_inst_list,
2459 struct team_option_inst, tmp_list);
2460
2461start_again:
2462 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2463 if (err)
2464 return err;
2465
2466 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2467 TEAM_CMD_OPTIONS_GET);
2468 if (!hdr) {
2469 nlmsg_free(skb);
2470 return -EMSGSIZE;
2471 }
2472
2473 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2474 goto nla_put_failure;
2475 option_list = nla_nest_start_noflag(skb, TEAM_ATTR_LIST_OPTION);
2476 if (!option_list)
2477 goto nla_put_failure;
2478
2479 i = 0;
2480 incomplete = false;
2481 list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2482 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2483 if (err) {
2484 if (err == -EMSGSIZE) {
2485 if (!i)
2486 goto errout;
2487 incomplete = true;
2488 break;
2489 }
2490 goto errout;
2491 }
2492 i++;
2493 }
2494
2495 nla_nest_end(skb, option_list);
2496 genlmsg_end(skb, hdr);
2497 if (incomplete)
2498 goto start_again;
2499
2500send_done:
2501 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2502 if (!nlh) {
2503 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2504 if (err)
2505 return err;
2506 goto send_done;
2507 }
2508
2509 return send_func(skb, team, portid);
2510
2511nla_put_failure:
2512 err = -EMSGSIZE;
2513errout:
2514 nlmsg_free(skb);
2515 return err;
2516}
2517
2518static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2519{
2520 struct team *team;
2521 struct team_option_inst *opt_inst;
2522 int err;
2523 LIST_HEAD(sel_opt_inst_list);
2524
2525 team = team_nl_team_get(info);
2526 if (!team)
2527 return -EINVAL;
2528
2529 list_for_each_entry(opt_inst, &team->option_inst_list, list)
2530 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2531 err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2532 NLM_F_ACK, team_nl_send_unicast,
2533 &sel_opt_inst_list);
2534
2535 team_nl_team_put(team);
2536
2537 return err;
2538}
2539
2540static int team_nl_send_event_options_get(struct team *team,
2541 struct list_head *sel_opt_inst_list);
2542
2543static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2544{
2545 struct team *team;
2546 int err = 0;
2547 int i;
2548 struct nlattr *nl_option;
2549
2550 rtnl_lock();
2551
2552 team = team_nl_team_get(info);
2553 if (!team) {
2554 err = -EINVAL;
2555 goto rtnl_unlock;
2556 }
2557
2558 err = -EINVAL;
2559 if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2560 err = -EINVAL;
2561 goto team_put;
2562 }
2563
2564 nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2565 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2566 struct nlattr *attr;
2567 struct nlattr *attr_data;
2568 LIST_HEAD(opt_inst_list);
2569 enum team_option_type opt_type;
2570 int opt_port_ifindex = 0; /* != 0 for per-port options */
2571 u32 opt_array_index = 0;
2572 bool opt_is_array = false;
2573 struct team_option_inst *opt_inst;
2574 char *opt_name;
2575 bool opt_found = false;
2576
2577 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2578 err = -EINVAL;
2579 goto team_put;
2580 }
2581 err = nla_parse_nested_deprecated(opt_attrs,
2582 TEAM_ATTR_OPTION_MAX,
2583 nl_option,
2584 team_nl_option_policy,
2585 info->extack);
2586 if (err)
2587 goto team_put;
2588 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2589 !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2590 err = -EINVAL;
2591 goto team_put;
2592 }
2593 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2594 case NLA_U32:
2595 opt_type = TEAM_OPTION_TYPE_U32;
2596 break;
2597 case NLA_STRING:
2598 opt_type = TEAM_OPTION_TYPE_STRING;
2599 break;
2600 case NLA_BINARY:
2601 opt_type = TEAM_OPTION_TYPE_BINARY;
2602 break;
2603 case NLA_FLAG:
2604 opt_type = TEAM_OPTION_TYPE_BOOL;
2605 break;
2606 case NLA_S32:
2607 opt_type = TEAM_OPTION_TYPE_S32;
2608 break;
2609 default:
2610 goto team_put;
2611 }
2612
2613 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2614 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2615 err = -EINVAL;
2616 goto team_put;
2617 }
2618
2619 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2620 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2621 if (attr)
2622 opt_port_ifindex = nla_get_u32(attr);
2623
2624 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2625 if (attr) {
2626 opt_is_array = true;
2627 opt_array_index = nla_get_u32(attr);
2628 }
2629
2630 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2631 struct team_option *option = opt_inst->option;
2632 struct team_gsetter_ctx ctx;
2633 struct team_option_inst_info *opt_inst_info;
2634 int tmp_ifindex;
2635
2636 opt_inst_info = &opt_inst->info;
2637 tmp_ifindex = opt_inst_info->port ?
2638 opt_inst_info->port->dev->ifindex : 0;
2639 if (option->type != opt_type ||
2640 strcmp(option->name, opt_name) ||
2641 tmp_ifindex != opt_port_ifindex ||
2642 (option->array_size && !opt_is_array) ||
2643 opt_inst_info->array_index != opt_array_index)
2644 continue;
2645 opt_found = true;
2646 ctx.info = opt_inst_info;
2647 switch (opt_type) {
2648 case TEAM_OPTION_TYPE_U32:
2649 ctx.data.u32_val = nla_get_u32(attr_data);
2650 break;
2651 case TEAM_OPTION_TYPE_STRING:
2652 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2653 err = -EINVAL;
2654 goto team_put;
2655 }
2656 ctx.data.str_val = nla_data(attr_data);
2657 break;
2658 case TEAM_OPTION_TYPE_BINARY:
2659 ctx.data.bin_val.len = nla_len(attr_data);
2660 ctx.data.bin_val.ptr = nla_data(attr_data);
2661 break;
2662 case TEAM_OPTION_TYPE_BOOL:
2663 ctx.data.bool_val = attr_data ? true : false;
2664 break;
2665 case TEAM_OPTION_TYPE_S32:
2666 ctx.data.s32_val = nla_get_s32(attr_data);
2667 break;
2668 default:
2669 BUG();
2670 }
2671 err = team_option_set(team, opt_inst, &ctx);
2672 if (err)
2673 goto team_put;
2674 opt_inst->changed = true;
2675 list_add(&opt_inst->tmp_list, &opt_inst_list);
2676 }
2677 if (!opt_found) {
2678 err = -ENOENT;
2679 goto team_put;
2680 }
2681
2682 err = team_nl_send_event_options_get(team, &opt_inst_list);
2683 if (err)
2684 break;
2685 }
2686
2687team_put:
2688 team_nl_team_put(team);
2689rtnl_unlock:
2690 rtnl_unlock();
2691 return err;
2692}
2693
2694static int team_nl_fill_one_port_get(struct sk_buff *skb,
2695 struct team_port *port)
2696{
2697 struct nlattr *port_item;
2698
2699 port_item = nla_nest_start_noflag(skb, TEAM_ATTR_ITEM_PORT);
2700 if (!port_item)
2701 goto nest_cancel;
2702 if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2703 goto nest_cancel;
2704 if (port->changed) {
2705 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2706 goto nest_cancel;
2707 port->changed = false;
2708 }
2709 if ((port->removed &&
2710 nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2711 (port->state.linkup &&
2712 nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2713 nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2714 nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2715 goto nest_cancel;
2716 nla_nest_end(skb, port_item);
2717 return 0;
2718
2719nest_cancel:
2720 nla_nest_cancel(skb, port_item);
2721 return -EMSGSIZE;
2722}
2723
2724static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2725 int flags, team_nl_send_func_t *send_func,
2726 struct team_port *one_port)
2727{
2728 struct nlattr *port_list;
2729 struct nlmsghdr *nlh;
2730 void *hdr;
2731 struct team_port *port;
2732 int err;
2733 struct sk_buff *skb = NULL;
2734 bool incomplete;
2735 int i;
2736
2737 port = list_first_entry_or_null(&team->port_list,
2738 struct team_port, list);
2739
2740start_again:
2741 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2742 if (err)
2743 return err;
2744
2745 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2746 TEAM_CMD_PORT_LIST_GET);
2747 if (!hdr) {
2748 nlmsg_free(skb);
2749 return -EMSGSIZE;
2750 }
2751
2752 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2753 goto nla_put_failure;
2754 port_list = nla_nest_start_noflag(skb, TEAM_ATTR_LIST_PORT);
2755 if (!port_list)
2756 goto nla_put_failure;
2757
2758 i = 0;
2759 incomplete = false;
2760
2761 /* If one port is selected, called wants to send port list containing
2762 * only this port. Otherwise go through all listed ports and send all
2763 */
2764 if (one_port) {
2765 err = team_nl_fill_one_port_get(skb, one_port);
2766 if (err)
2767 goto errout;
2768 } else if (port) {
2769 list_for_each_entry_from(port, &team->port_list, list) {
2770 err = team_nl_fill_one_port_get(skb, port);
2771 if (err) {
2772 if (err == -EMSGSIZE) {
2773 if (!i)
2774 goto errout;
2775 incomplete = true;
2776 break;
2777 }
2778 goto errout;
2779 }
2780 i++;
2781 }
2782 }
2783
2784 nla_nest_end(skb, port_list);
2785 genlmsg_end(skb, hdr);
2786 if (incomplete)
2787 goto start_again;
2788
2789send_done:
2790 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2791 if (!nlh) {
2792 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2793 if (err)
2794 return err;
2795 goto send_done;
2796 }
2797
2798 return send_func(skb, team, portid);
2799
2800nla_put_failure:
2801 err = -EMSGSIZE;
2802errout:
2803 nlmsg_free(skb);
2804 return err;
2805}
2806
2807static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2808 struct genl_info *info)
2809{
2810 struct team *team;
2811 int err;
2812
2813 team = team_nl_team_get(info);
2814 if (!team)
2815 return -EINVAL;
2816
2817 err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2818 NLM_F_ACK, team_nl_send_unicast, NULL);
2819
2820 team_nl_team_put(team);
2821
2822 return err;
2823}
2824
2825static const struct genl_small_ops team_nl_ops[] = {
2826 {
2827 .cmd = TEAM_CMD_NOOP,
2828 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2829 .doit = team_nl_cmd_noop,
2830 },
2831 {
2832 .cmd = TEAM_CMD_OPTIONS_SET,
2833 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2834 .doit = team_nl_cmd_options_set,
2835 .flags = GENL_ADMIN_PERM,
2836 },
2837 {
2838 .cmd = TEAM_CMD_OPTIONS_GET,
2839 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2840 .doit = team_nl_cmd_options_get,
2841 .flags = GENL_ADMIN_PERM,
2842 },
2843 {
2844 .cmd = TEAM_CMD_PORT_LIST_GET,
2845 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2846 .doit = team_nl_cmd_port_list_get,
2847 .flags = GENL_ADMIN_PERM,
2848 },
2849};
2850
2851static const struct genl_multicast_group team_nl_mcgrps[] = {
2852 { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2853};
2854
2855static struct genl_family team_nl_family __ro_after_init = {
2856 .name = TEAM_GENL_NAME,
2857 .version = TEAM_GENL_VERSION,
2858 .maxattr = TEAM_ATTR_MAX,
2859 .policy = team_nl_policy,
2860 .netnsok = true,
2861 .module = THIS_MODULE,
2862 .small_ops = team_nl_ops,
2863 .n_small_ops = ARRAY_SIZE(team_nl_ops),
2864 .resv_start_op = TEAM_CMD_PORT_LIST_GET + 1,
2865 .mcgrps = team_nl_mcgrps,
2866 .n_mcgrps = ARRAY_SIZE(team_nl_mcgrps),
2867};
2868
2869static int team_nl_send_multicast(struct sk_buff *skb,
2870 struct team *team, u32 portid)
2871{
2872 return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2873 skb, 0, 0, GFP_KERNEL);
2874}
2875
2876static int team_nl_send_event_options_get(struct team *team,
2877 struct list_head *sel_opt_inst_list)
2878{
2879 return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2880 sel_opt_inst_list);
2881}
2882
2883static int team_nl_send_event_port_get(struct team *team,
2884 struct team_port *port)
2885{
2886 return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2887 port);
2888}
2889
2890static int __init team_nl_init(void)
2891{
2892 return genl_register_family(&team_nl_family);
2893}
2894
2895static void __exit team_nl_fini(void)
2896{
2897 genl_unregister_family(&team_nl_family);
2898}
2899
2900
2901/******************
2902 * Change checkers
2903 ******************/
2904
2905static void __team_options_change_check(struct team *team)
2906{
2907 int err;
2908 struct team_option_inst *opt_inst;
2909 LIST_HEAD(sel_opt_inst_list);
2910
2911 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2912 if (opt_inst->changed)
2913 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2914 }
2915 err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2916 if (err && err != -ESRCH)
2917 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2918 err);
2919}
2920
2921/* rtnl lock is held */
2922
2923static void __team_port_change_send(struct team_port *port, bool linkup)
2924{
2925 int err;
2926
2927 port->changed = true;
2928 port->state.linkup = linkup;
2929 team_refresh_port_linkup(port);
2930 if (linkup) {
2931 struct ethtool_link_ksettings ecmd;
2932
2933 err = __ethtool_get_link_ksettings(port->dev, &ecmd);
2934 if (!err) {
2935 port->state.speed = ecmd.base.speed;
2936 port->state.duplex = ecmd.base.duplex;
2937 goto send_event;
2938 }
2939 }
2940 port->state.speed = 0;
2941 port->state.duplex = 0;
2942
2943send_event:
2944 err = team_nl_send_event_port_get(port->team, port);
2945 if (err && err != -ESRCH)
2946 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2947 port->dev->name, err);
2948
2949}
2950
2951static void __team_carrier_check(struct team *team)
2952{
2953 struct team_port *port;
2954 bool team_linkup;
2955
2956 if (team->user_carrier_enabled)
2957 return;
2958
2959 team_linkup = false;
2960 list_for_each_entry(port, &team->port_list, list) {
2961 if (port->linkup) {
2962 team_linkup = true;
2963 break;
2964 }
2965 }
2966
2967 if (team_linkup)
2968 netif_carrier_on(team->dev);
2969 else
2970 netif_carrier_off(team->dev);
2971}
2972
2973static void __team_port_change_check(struct team_port *port, bool linkup)
2974{
2975 if (port->state.linkup != linkup)
2976 __team_port_change_send(port, linkup);
2977 __team_carrier_check(port->team);
2978}
2979
2980static void __team_port_change_port_added(struct team_port *port, bool linkup)
2981{
2982 __team_port_change_send(port, linkup);
2983 __team_carrier_check(port->team);
2984}
2985
2986static void __team_port_change_port_removed(struct team_port *port)
2987{
2988 port->removed = true;
2989 __team_port_change_send(port, false);
2990 __team_carrier_check(port->team);
2991}
2992
2993static void team_port_change_check(struct team_port *port, bool linkup)
2994{
2995 struct team *team = port->team;
2996
2997 mutex_lock(&team->lock);
2998 __team_port_change_check(port, linkup);
2999 mutex_unlock(&team->lock);
3000}
3001
3002
3003/************************************
3004 * Net device notifier event handler
3005 ************************************/
3006
3007static int team_device_event(struct notifier_block *unused,
3008 unsigned long event, void *ptr)
3009{
3010 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
3011 struct team_port *port;
3012
3013 port = team_port_get_rtnl(dev);
3014 if (!port)
3015 return NOTIFY_DONE;
3016
3017 switch (event) {
3018 case NETDEV_UP:
3019 if (netif_oper_up(dev))
3020 team_port_change_check(port, true);
3021 break;
3022 case NETDEV_DOWN:
3023 team_port_change_check(port, false);
3024 break;
3025 case NETDEV_CHANGE:
3026 if (netif_running(port->dev))
3027 team_port_change_check(port,
3028 !!netif_oper_up(port->dev));
3029 break;
3030 case NETDEV_UNREGISTER:
3031 team_del_slave(port->team->dev, dev);
3032 break;
3033 case NETDEV_FEAT_CHANGE:
3034 if (!port->team->notifier_ctx) {
3035 port->team->notifier_ctx = true;
3036 team_compute_features(port->team);
3037 port->team->notifier_ctx = false;
3038 }
3039 break;
3040 case NETDEV_PRECHANGEMTU:
3041 /* Forbid to change mtu of underlaying device */
3042 if (!port->team->port_mtu_change_allowed)
3043 return NOTIFY_BAD;
3044 break;
3045 case NETDEV_PRE_TYPE_CHANGE:
3046 /* Forbid to change type of underlaying device */
3047 return NOTIFY_BAD;
3048 case NETDEV_RESEND_IGMP:
3049 /* Propagate to master device */
3050 call_netdevice_notifiers(event, port->team->dev);
3051 break;
3052 }
3053 return NOTIFY_DONE;
3054}
3055
3056static struct notifier_block team_notifier_block __read_mostly = {
3057 .notifier_call = team_device_event,
3058};
3059
3060
3061/***********************
3062 * Module init and exit
3063 ***********************/
3064
3065static int __init team_module_init(void)
3066{
3067 int err;
3068
3069 register_netdevice_notifier(&team_notifier_block);
3070
3071 err = rtnl_link_register(&team_link_ops);
3072 if (err)
3073 goto err_rtnl_reg;
3074
3075 err = team_nl_init();
3076 if (err)
3077 goto err_nl_init;
3078
3079 return 0;
3080
3081err_nl_init:
3082 rtnl_link_unregister(&team_link_ops);
3083
3084err_rtnl_reg:
3085 unregister_netdevice_notifier(&team_notifier_block);
3086
3087 return err;
3088}
3089
3090static void __exit team_module_exit(void)
3091{
3092 team_nl_fini();
3093 rtnl_link_unregister(&team_link_ops);
3094 unregister_netdevice_notifier(&team_notifier_block);
3095}
3096
3097module_init(team_module_init);
3098module_exit(team_module_exit);
3099
3100MODULE_LICENSE("GPL v2");
3101MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
3102MODULE_DESCRIPTION("Ethernet team device driver");
3103MODULE_ALIAS_RTNL_LINK(DRV_NAME);
1/*
2 * drivers/net/team/team.c - Network team device driver
3 * Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 */
10
11#include <linux/kernel.h>
12#include <linux/types.h>
13#include <linux/module.h>
14#include <linux/init.h>
15#include <linux/slab.h>
16#include <linux/rcupdate.h>
17#include <linux/errno.h>
18#include <linux/ctype.h>
19#include <linux/notifier.h>
20#include <linux/netdevice.h>
21#include <linux/netpoll.h>
22#include <linux/if_vlan.h>
23#include <linux/if_arp.h>
24#include <linux/socket.h>
25#include <linux/etherdevice.h>
26#include <linux/rtnetlink.h>
27#include <net/rtnetlink.h>
28#include <net/genetlink.h>
29#include <net/netlink.h>
30#include <net/sch_generic.h>
31#include <net/switchdev.h>
32#include <generated/utsrelease.h>
33#include <linux/if_team.h>
34
35#define DRV_NAME "team"
36
37
38/**********
39 * Helpers
40 **********/
41
42#define team_port_exists(dev) (dev->priv_flags & IFF_TEAM_PORT)
43
44static struct team_port *team_port_get_rcu(const struct net_device *dev)
45{
46 return rcu_dereference(dev->rx_handler_data);
47}
48
49static struct team_port *team_port_get_rtnl(const struct net_device *dev)
50{
51 struct team_port *port = rtnl_dereference(dev->rx_handler_data);
52
53 return team_port_exists(dev) ? port : NULL;
54}
55
56/*
57 * Since the ability to change device address for open port device is tested in
58 * team_port_add, this function can be called without control of return value
59 */
60static int __set_port_dev_addr(struct net_device *port_dev,
61 const unsigned char *dev_addr)
62{
63 struct sockaddr addr;
64
65 memcpy(addr.sa_data, dev_addr, port_dev->addr_len);
66 addr.sa_family = port_dev->type;
67 return dev_set_mac_address(port_dev, &addr);
68}
69
70static int team_port_set_orig_dev_addr(struct team_port *port)
71{
72 return __set_port_dev_addr(port->dev, port->orig.dev_addr);
73}
74
75static int team_port_set_team_dev_addr(struct team *team,
76 struct team_port *port)
77{
78 return __set_port_dev_addr(port->dev, team->dev->dev_addr);
79}
80
81int team_modeop_port_enter(struct team *team, struct team_port *port)
82{
83 return team_port_set_team_dev_addr(team, port);
84}
85EXPORT_SYMBOL(team_modeop_port_enter);
86
87void team_modeop_port_change_dev_addr(struct team *team,
88 struct team_port *port)
89{
90 team_port_set_team_dev_addr(team, port);
91}
92EXPORT_SYMBOL(team_modeop_port_change_dev_addr);
93
94static void team_lower_state_changed(struct team_port *port)
95{
96 struct netdev_lag_lower_state_info info;
97
98 info.link_up = port->linkup;
99 info.tx_enabled = team_port_enabled(port);
100 netdev_lower_state_changed(port->dev, &info);
101}
102
103static void team_refresh_port_linkup(struct team_port *port)
104{
105 bool new_linkup = port->user.linkup_enabled ? port->user.linkup :
106 port->state.linkup;
107
108 if (port->linkup != new_linkup) {
109 port->linkup = new_linkup;
110 team_lower_state_changed(port);
111 }
112}
113
114
115/*******************
116 * Options handling
117 *******************/
118
119struct team_option_inst { /* One for each option instance */
120 struct list_head list;
121 struct list_head tmp_list;
122 struct team_option *option;
123 struct team_option_inst_info info;
124 bool changed;
125 bool removed;
126};
127
128static struct team_option *__team_find_option(struct team *team,
129 const char *opt_name)
130{
131 struct team_option *option;
132
133 list_for_each_entry(option, &team->option_list, list) {
134 if (strcmp(option->name, opt_name) == 0)
135 return option;
136 }
137 return NULL;
138}
139
140static void __team_option_inst_del(struct team_option_inst *opt_inst)
141{
142 list_del(&opt_inst->list);
143 kfree(opt_inst);
144}
145
146static void __team_option_inst_del_option(struct team *team,
147 struct team_option *option)
148{
149 struct team_option_inst *opt_inst, *tmp;
150
151 list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
152 if (opt_inst->option == option)
153 __team_option_inst_del(opt_inst);
154 }
155}
156
157static int __team_option_inst_add(struct team *team, struct team_option *option,
158 struct team_port *port)
159{
160 struct team_option_inst *opt_inst;
161 unsigned int array_size;
162 unsigned int i;
163 int err;
164
165 array_size = option->array_size;
166 if (!array_size)
167 array_size = 1; /* No array but still need one instance */
168
169 for (i = 0; i < array_size; i++) {
170 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL);
171 if (!opt_inst)
172 return -ENOMEM;
173 opt_inst->option = option;
174 opt_inst->info.port = port;
175 opt_inst->info.array_index = i;
176 opt_inst->changed = true;
177 opt_inst->removed = false;
178 list_add_tail(&opt_inst->list, &team->option_inst_list);
179 if (option->init) {
180 err = option->init(team, &opt_inst->info);
181 if (err)
182 return err;
183 }
184
185 }
186 return 0;
187}
188
189static int __team_option_inst_add_option(struct team *team,
190 struct team_option *option)
191{
192 int err;
193
194 if (!option->per_port) {
195 err = __team_option_inst_add(team, option, NULL);
196 if (err)
197 goto inst_del_option;
198 }
199 return 0;
200
201inst_del_option:
202 __team_option_inst_del_option(team, option);
203 return err;
204}
205
206static void __team_option_inst_mark_removed_option(struct team *team,
207 struct team_option *option)
208{
209 struct team_option_inst *opt_inst;
210
211 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
212 if (opt_inst->option == option) {
213 opt_inst->changed = true;
214 opt_inst->removed = true;
215 }
216 }
217}
218
219static void __team_option_inst_del_port(struct team *team,
220 struct team_port *port)
221{
222 struct team_option_inst *opt_inst, *tmp;
223
224 list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
225 if (opt_inst->option->per_port &&
226 opt_inst->info.port == port)
227 __team_option_inst_del(opt_inst);
228 }
229}
230
231static int __team_option_inst_add_port(struct team *team,
232 struct team_port *port)
233{
234 struct team_option *option;
235 int err;
236
237 list_for_each_entry(option, &team->option_list, list) {
238 if (!option->per_port)
239 continue;
240 err = __team_option_inst_add(team, option, port);
241 if (err)
242 goto inst_del_port;
243 }
244 return 0;
245
246inst_del_port:
247 __team_option_inst_del_port(team, port);
248 return err;
249}
250
251static void __team_option_inst_mark_removed_port(struct team *team,
252 struct team_port *port)
253{
254 struct team_option_inst *opt_inst;
255
256 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
257 if (opt_inst->info.port == port) {
258 opt_inst->changed = true;
259 opt_inst->removed = true;
260 }
261 }
262}
263
264static int __team_options_register(struct team *team,
265 const struct team_option *option,
266 size_t option_count)
267{
268 int i;
269 struct team_option **dst_opts;
270 int err;
271
272 dst_opts = kzalloc(sizeof(struct team_option *) * option_count,
273 GFP_KERNEL);
274 if (!dst_opts)
275 return -ENOMEM;
276 for (i = 0; i < option_count; i++, option++) {
277 if (__team_find_option(team, option->name)) {
278 err = -EEXIST;
279 goto alloc_rollback;
280 }
281 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
282 if (!dst_opts[i]) {
283 err = -ENOMEM;
284 goto alloc_rollback;
285 }
286 }
287
288 for (i = 0; i < option_count; i++) {
289 err = __team_option_inst_add_option(team, dst_opts[i]);
290 if (err)
291 goto inst_rollback;
292 list_add_tail(&dst_opts[i]->list, &team->option_list);
293 }
294
295 kfree(dst_opts);
296 return 0;
297
298inst_rollback:
299 for (i--; i >= 0; i--)
300 __team_option_inst_del_option(team, dst_opts[i]);
301
302 i = option_count - 1;
303alloc_rollback:
304 for (i--; i >= 0; i--)
305 kfree(dst_opts[i]);
306
307 kfree(dst_opts);
308 return err;
309}
310
311static void __team_options_mark_removed(struct team *team,
312 const struct team_option *option,
313 size_t option_count)
314{
315 int i;
316
317 for (i = 0; i < option_count; i++, option++) {
318 struct team_option *del_opt;
319
320 del_opt = __team_find_option(team, option->name);
321 if (del_opt)
322 __team_option_inst_mark_removed_option(team, del_opt);
323 }
324}
325
326static void __team_options_unregister(struct team *team,
327 const struct team_option *option,
328 size_t option_count)
329{
330 int i;
331
332 for (i = 0; i < option_count; i++, option++) {
333 struct team_option *del_opt;
334
335 del_opt = __team_find_option(team, option->name);
336 if (del_opt) {
337 __team_option_inst_del_option(team, del_opt);
338 list_del(&del_opt->list);
339 kfree(del_opt);
340 }
341 }
342}
343
344static void __team_options_change_check(struct team *team);
345
346int team_options_register(struct team *team,
347 const struct team_option *option,
348 size_t option_count)
349{
350 int err;
351
352 err = __team_options_register(team, option, option_count);
353 if (err)
354 return err;
355 __team_options_change_check(team);
356 return 0;
357}
358EXPORT_SYMBOL(team_options_register);
359
360void team_options_unregister(struct team *team,
361 const struct team_option *option,
362 size_t option_count)
363{
364 __team_options_mark_removed(team, option, option_count);
365 __team_options_change_check(team);
366 __team_options_unregister(team, option, option_count);
367}
368EXPORT_SYMBOL(team_options_unregister);
369
370static int team_option_get(struct team *team,
371 struct team_option_inst *opt_inst,
372 struct team_gsetter_ctx *ctx)
373{
374 if (!opt_inst->option->getter)
375 return -EOPNOTSUPP;
376 return opt_inst->option->getter(team, ctx);
377}
378
379static int team_option_set(struct team *team,
380 struct team_option_inst *opt_inst,
381 struct team_gsetter_ctx *ctx)
382{
383 if (!opt_inst->option->setter)
384 return -EOPNOTSUPP;
385 return opt_inst->option->setter(team, ctx);
386}
387
388void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info)
389{
390 struct team_option_inst *opt_inst;
391
392 opt_inst = container_of(opt_inst_info, struct team_option_inst, info);
393 opt_inst->changed = true;
394}
395EXPORT_SYMBOL(team_option_inst_set_change);
396
397void team_options_change_check(struct team *team)
398{
399 __team_options_change_check(team);
400}
401EXPORT_SYMBOL(team_options_change_check);
402
403
404/****************
405 * Mode handling
406 ****************/
407
408static LIST_HEAD(mode_list);
409static DEFINE_SPINLOCK(mode_list_lock);
410
411struct team_mode_item {
412 struct list_head list;
413 const struct team_mode *mode;
414};
415
416static struct team_mode_item *__find_mode(const char *kind)
417{
418 struct team_mode_item *mitem;
419
420 list_for_each_entry(mitem, &mode_list, list) {
421 if (strcmp(mitem->mode->kind, kind) == 0)
422 return mitem;
423 }
424 return NULL;
425}
426
427static bool is_good_mode_name(const char *name)
428{
429 while (*name != '\0') {
430 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
431 return false;
432 name++;
433 }
434 return true;
435}
436
437int team_mode_register(const struct team_mode *mode)
438{
439 int err = 0;
440 struct team_mode_item *mitem;
441
442 if (!is_good_mode_name(mode->kind) ||
443 mode->priv_size > TEAM_MODE_PRIV_SIZE)
444 return -EINVAL;
445
446 mitem = kmalloc(sizeof(*mitem), GFP_KERNEL);
447 if (!mitem)
448 return -ENOMEM;
449
450 spin_lock(&mode_list_lock);
451 if (__find_mode(mode->kind)) {
452 err = -EEXIST;
453 kfree(mitem);
454 goto unlock;
455 }
456 mitem->mode = mode;
457 list_add_tail(&mitem->list, &mode_list);
458unlock:
459 spin_unlock(&mode_list_lock);
460 return err;
461}
462EXPORT_SYMBOL(team_mode_register);
463
464void team_mode_unregister(const struct team_mode *mode)
465{
466 struct team_mode_item *mitem;
467
468 spin_lock(&mode_list_lock);
469 mitem = __find_mode(mode->kind);
470 if (mitem) {
471 list_del_init(&mitem->list);
472 kfree(mitem);
473 }
474 spin_unlock(&mode_list_lock);
475}
476EXPORT_SYMBOL(team_mode_unregister);
477
478static const struct team_mode *team_mode_get(const char *kind)
479{
480 struct team_mode_item *mitem;
481 const struct team_mode *mode = NULL;
482
483 spin_lock(&mode_list_lock);
484 mitem = __find_mode(kind);
485 if (!mitem) {
486 spin_unlock(&mode_list_lock);
487 request_module("team-mode-%s", kind);
488 spin_lock(&mode_list_lock);
489 mitem = __find_mode(kind);
490 }
491 if (mitem) {
492 mode = mitem->mode;
493 if (!try_module_get(mode->owner))
494 mode = NULL;
495 }
496
497 spin_unlock(&mode_list_lock);
498 return mode;
499}
500
501static void team_mode_put(const struct team_mode *mode)
502{
503 module_put(mode->owner);
504}
505
506static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
507{
508 dev_kfree_skb_any(skb);
509 return false;
510}
511
512static rx_handler_result_t team_dummy_receive(struct team *team,
513 struct team_port *port,
514 struct sk_buff *skb)
515{
516 return RX_HANDLER_ANOTHER;
517}
518
519static const struct team_mode __team_no_mode = {
520 .kind = "*NOMODE*",
521};
522
523static bool team_is_mode_set(struct team *team)
524{
525 return team->mode != &__team_no_mode;
526}
527
528static void team_set_no_mode(struct team *team)
529{
530 team->user_carrier_enabled = false;
531 team->mode = &__team_no_mode;
532}
533
534static void team_adjust_ops(struct team *team)
535{
536 /*
537 * To avoid checks in rx/tx skb paths, ensure here that non-null and
538 * correct ops are always set.
539 */
540
541 if (!team->en_port_count || !team_is_mode_set(team) ||
542 !team->mode->ops->transmit)
543 team->ops.transmit = team_dummy_transmit;
544 else
545 team->ops.transmit = team->mode->ops->transmit;
546
547 if (!team->en_port_count || !team_is_mode_set(team) ||
548 !team->mode->ops->receive)
549 team->ops.receive = team_dummy_receive;
550 else
551 team->ops.receive = team->mode->ops->receive;
552}
553
554/*
555 * We can benefit from the fact that it's ensured no port is present
556 * at the time of mode change. Therefore no packets are in fly so there's no
557 * need to set mode operations in any special way.
558 */
559static int __team_change_mode(struct team *team,
560 const struct team_mode *new_mode)
561{
562 /* Check if mode was previously set and do cleanup if so */
563 if (team_is_mode_set(team)) {
564 void (*exit_op)(struct team *team) = team->ops.exit;
565
566 /* Clear ops area so no callback is called any longer */
567 memset(&team->ops, 0, sizeof(struct team_mode_ops));
568 team_adjust_ops(team);
569
570 if (exit_op)
571 exit_op(team);
572 team_mode_put(team->mode);
573 team_set_no_mode(team);
574 /* zero private data area */
575 memset(&team->mode_priv, 0,
576 sizeof(struct team) - offsetof(struct team, mode_priv));
577 }
578
579 if (!new_mode)
580 return 0;
581
582 if (new_mode->ops->init) {
583 int err;
584
585 err = new_mode->ops->init(team);
586 if (err)
587 return err;
588 }
589
590 team->mode = new_mode;
591 memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
592 team_adjust_ops(team);
593
594 return 0;
595}
596
597static int team_change_mode(struct team *team, const char *kind)
598{
599 const struct team_mode *new_mode;
600 struct net_device *dev = team->dev;
601 int err;
602
603 if (!list_empty(&team->port_list)) {
604 netdev_err(dev, "No ports can be present during mode change\n");
605 return -EBUSY;
606 }
607
608 if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) {
609 netdev_err(dev, "Unable to change to the same mode the team is in\n");
610 return -EINVAL;
611 }
612
613 new_mode = team_mode_get(kind);
614 if (!new_mode) {
615 netdev_err(dev, "Mode \"%s\" not found\n", kind);
616 return -EINVAL;
617 }
618
619 err = __team_change_mode(team, new_mode);
620 if (err) {
621 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
622 team_mode_put(new_mode);
623 return err;
624 }
625
626 netdev_info(dev, "Mode changed to \"%s\"\n", kind);
627 return 0;
628}
629
630
631/*********************
632 * Peers notification
633 *********************/
634
635static void team_notify_peers_work(struct work_struct *work)
636{
637 struct team *team;
638 int val;
639
640 team = container_of(work, struct team, notify_peers.dw.work);
641
642 if (!rtnl_trylock()) {
643 schedule_delayed_work(&team->notify_peers.dw, 0);
644 return;
645 }
646 val = atomic_dec_if_positive(&team->notify_peers.count_pending);
647 if (val < 0) {
648 rtnl_unlock();
649 return;
650 }
651 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, team->dev);
652 rtnl_unlock();
653 if (val)
654 schedule_delayed_work(&team->notify_peers.dw,
655 msecs_to_jiffies(team->notify_peers.interval));
656}
657
658static void team_notify_peers(struct team *team)
659{
660 if (!team->notify_peers.count || !netif_running(team->dev))
661 return;
662 atomic_add(team->notify_peers.count, &team->notify_peers.count_pending);
663 schedule_delayed_work(&team->notify_peers.dw, 0);
664}
665
666static void team_notify_peers_init(struct team *team)
667{
668 INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work);
669}
670
671static void team_notify_peers_fini(struct team *team)
672{
673 cancel_delayed_work_sync(&team->notify_peers.dw);
674}
675
676
677/*******************************
678 * Send multicast group rejoins
679 *******************************/
680
681static void team_mcast_rejoin_work(struct work_struct *work)
682{
683 struct team *team;
684 int val;
685
686 team = container_of(work, struct team, mcast_rejoin.dw.work);
687
688 if (!rtnl_trylock()) {
689 schedule_delayed_work(&team->mcast_rejoin.dw, 0);
690 return;
691 }
692 val = atomic_dec_if_positive(&team->mcast_rejoin.count_pending);
693 if (val < 0) {
694 rtnl_unlock();
695 return;
696 }
697 call_netdevice_notifiers(NETDEV_RESEND_IGMP, team->dev);
698 rtnl_unlock();
699 if (val)
700 schedule_delayed_work(&team->mcast_rejoin.dw,
701 msecs_to_jiffies(team->mcast_rejoin.interval));
702}
703
704static void team_mcast_rejoin(struct team *team)
705{
706 if (!team->mcast_rejoin.count || !netif_running(team->dev))
707 return;
708 atomic_add(team->mcast_rejoin.count, &team->mcast_rejoin.count_pending);
709 schedule_delayed_work(&team->mcast_rejoin.dw, 0);
710}
711
712static void team_mcast_rejoin_init(struct team *team)
713{
714 INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work);
715}
716
717static void team_mcast_rejoin_fini(struct team *team)
718{
719 cancel_delayed_work_sync(&team->mcast_rejoin.dw);
720}
721
722
723/************************
724 * Rx path frame handler
725 ************************/
726
727/* note: already called with rcu_read_lock */
728static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
729{
730 struct sk_buff *skb = *pskb;
731 struct team_port *port;
732 struct team *team;
733 rx_handler_result_t res;
734
735 skb = skb_share_check(skb, GFP_ATOMIC);
736 if (!skb)
737 return RX_HANDLER_CONSUMED;
738
739 *pskb = skb;
740
741 port = team_port_get_rcu(skb->dev);
742 team = port->team;
743 if (!team_port_enabled(port)) {
744 /* allow exact match delivery for disabled ports */
745 res = RX_HANDLER_EXACT;
746 } else {
747 res = team->ops.receive(team, port, skb);
748 }
749 if (res == RX_HANDLER_ANOTHER) {
750 struct team_pcpu_stats *pcpu_stats;
751
752 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
753 u64_stats_update_begin(&pcpu_stats->syncp);
754 pcpu_stats->rx_packets++;
755 pcpu_stats->rx_bytes += skb->len;
756 if (skb->pkt_type == PACKET_MULTICAST)
757 pcpu_stats->rx_multicast++;
758 u64_stats_update_end(&pcpu_stats->syncp);
759
760 skb->dev = team->dev;
761 } else if (res == RX_HANDLER_EXACT) {
762 this_cpu_inc(team->pcpu_stats->rx_nohandler);
763 } else {
764 this_cpu_inc(team->pcpu_stats->rx_dropped);
765 }
766
767 return res;
768}
769
770
771/*************************************
772 * Multiqueue Tx port select override
773 *************************************/
774
775static int team_queue_override_init(struct team *team)
776{
777 struct list_head *listarr;
778 unsigned int queue_cnt = team->dev->num_tx_queues - 1;
779 unsigned int i;
780
781 if (!queue_cnt)
782 return 0;
783 listarr = kmalloc(sizeof(struct list_head) * queue_cnt, GFP_KERNEL);
784 if (!listarr)
785 return -ENOMEM;
786 team->qom_lists = listarr;
787 for (i = 0; i < queue_cnt; i++)
788 INIT_LIST_HEAD(listarr++);
789 return 0;
790}
791
792static void team_queue_override_fini(struct team *team)
793{
794 kfree(team->qom_lists);
795}
796
797static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
798{
799 return &team->qom_lists[queue_id - 1];
800}
801
802/*
803 * note: already called with rcu_read_lock
804 */
805static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
806{
807 struct list_head *qom_list;
808 struct team_port *port;
809
810 if (!team->queue_override_enabled || !skb->queue_mapping)
811 return false;
812 qom_list = __team_get_qom_list(team, skb->queue_mapping);
813 list_for_each_entry_rcu(port, qom_list, qom_list) {
814 if (!team_dev_queue_xmit(team, port, skb))
815 return true;
816 }
817 return false;
818}
819
820static void __team_queue_override_port_del(struct team *team,
821 struct team_port *port)
822{
823 if (!port->queue_id)
824 return;
825 list_del_rcu(&port->qom_list);
826}
827
828static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
829 struct team_port *cur)
830{
831 if (port->priority < cur->priority)
832 return true;
833 if (port->priority > cur->priority)
834 return false;
835 if (port->index < cur->index)
836 return true;
837 return false;
838}
839
840static void __team_queue_override_port_add(struct team *team,
841 struct team_port *port)
842{
843 struct team_port *cur;
844 struct list_head *qom_list;
845 struct list_head *node;
846
847 if (!port->queue_id)
848 return;
849 qom_list = __team_get_qom_list(team, port->queue_id);
850 node = qom_list;
851 list_for_each_entry(cur, qom_list, qom_list) {
852 if (team_queue_override_port_has_gt_prio_than(port, cur))
853 break;
854 node = &cur->qom_list;
855 }
856 list_add_tail_rcu(&port->qom_list, node);
857}
858
859static void __team_queue_override_enabled_check(struct team *team)
860{
861 struct team_port *port;
862 bool enabled = false;
863
864 list_for_each_entry(port, &team->port_list, list) {
865 if (port->queue_id) {
866 enabled = true;
867 break;
868 }
869 }
870 if (enabled == team->queue_override_enabled)
871 return;
872 netdev_dbg(team->dev, "%s queue override\n",
873 enabled ? "Enabling" : "Disabling");
874 team->queue_override_enabled = enabled;
875}
876
877static void team_queue_override_port_prio_changed(struct team *team,
878 struct team_port *port)
879{
880 if (!port->queue_id || team_port_enabled(port))
881 return;
882 __team_queue_override_port_del(team, port);
883 __team_queue_override_port_add(team, port);
884 __team_queue_override_enabled_check(team);
885}
886
887static void team_queue_override_port_change_queue_id(struct team *team,
888 struct team_port *port,
889 u16 new_queue_id)
890{
891 if (team_port_enabled(port)) {
892 __team_queue_override_port_del(team, port);
893 port->queue_id = new_queue_id;
894 __team_queue_override_port_add(team, port);
895 __team_queue_override_enabled_check(team);
896 } else {
897 port->queue_id = new_queue_id;
898 }
899}
900
901static void team_queue_override_port_add(struct team *team,
902 struct team_port *port)
903{
904 __team_queue_override_port_add(team, port);
905 __team_queue_override_enabled_check(team);
906}
907
908static void team_queue_override_port_del(struct team *team,
909 struct team_port *port)
910{
911 __team_queue_override_port_del(team, port);
912 __team_queue_override_enabled_check(team);
913}
914
915
916/****************
917 * Port handling
918 ****************/
919
920static bool team_port_find(const struct team *team,
921 const struct team_port *port)
922{
923 struct team_port *cur;
924
925 list_for_each_entry(cur, &team->port_list, list)
926 if (cur == port)
927 return true;
928 return false;
929}
930
931/*
932 * Enable/disable port by adding to enabled port hashlist and setting
933 * port->index (Might be racy so reader could see incorrect ifindex when
934 * processing a flying packet, but that is not a problem). Write guarded
935 * by team->lock.
936 */
937static void team_port_enable(struct team *team,
938 struct team_port *port)
939{
940 if (team_port_enabled(port))
941 return;
942 port->index = team->en_port_count++;
943 hlist_add_head_rcu(&port->hlist,
944 team_port_index_hash(team, port->index));
945 team_adjust_ops(team);
946 team_queue_override_port_add(team, port);
947 if (team->ops.port_enabled)
948 team->ops.port_enabled(team, port);
949 team_notify_peers(team);
950 team_mcast_rejoin(team);
951 team_lower_state_changed(port);
952}
953
954static void __reconstruct_port_hlist(struct team *team, int rm_index)
955{
956 int i;
957 struct team_port *port;
958
959 for (i = rm_index + 1; i < team->en_port_count; i++) {
960 port = team_get_port_by_index(team, i);
961 hlist_del_rcu(&port->hlist);
962 port->index--;
963 hlist_add_head_rcu(&port->hlist,
964 team_port_index_hash(team, port->index));
965 }
966}
967
968static void team_port_disable(struct team *team,
969 struct team_port *port)
970{
971 if (!team_port_enabled(port))
972 return;
973 if (team->ops.port_disabled)
974 team->ops.port_disabled(team, port);
975 hlist_del_rcu(&port->hlist);
976 __reconstruct_port_hlist(team, port->index);
977 port->index = -1;
978 team->en_port_count--;
979 team_queue_override_port_del(team, port);
980 team_adjust_ops(team);
981 team_notify_peers(team);
982 team_mcast_rejoin(team);
983 team_lower_state_changed(port);
984}
985
986#define TEAM_VLAN_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
987 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
988 NETIF_F_HIGHDMA | NETIF_F_LRO)
989
990#define TEAM_ENC_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
991 NETIF_F_RXCSUM | NETIF_F_ALL_TSO)
992
993static void __team_compute_features(struct team *team)
994{
995 struct team_port *port;
996 u32 vlan_features = TEAM_VLAN_FEATURES & NETIF_F_ALL_FOR_ALL;
997 netdev_features_t enc_features = TEAM_ENC_FEATURES;
998 unsigned short max_hard_header_len = ETH_HLEN;
999 unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE |
1000 IFF_XMIT_DST_RELEASE_PERM;
1001
1002 list_for_each_entry(port, &team->port_list, list) {
1003 vlan_features = netdev_increment_features(vlan_features,
1004 port->dev->vlan_features,
1005 TEAM_VLAN_FEATURES);
1006 enc_features =
1007 netdev_increment_features(enc_features,
1008 port->dev->hw_enc_features,
1009 TEAM_ENC_FEATURES);
1010
1011
1012 dst_release_flag &= port->dev->priv_flags;
1013 if (port->dev->hard_header_len > max_hard_header_len)
1014 max_hard_header_len = port->dev->hard_header_len;
1015 }
1016
1017 team->dev->vlan_features = vlan_features;
1018 team->dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL;
1019 team->dev->hard_header_len = max_hard_header_len;
1020
1021 team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
1022 if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
1023 team->dev->priv_flags |= IFF_XMIT_DST_RELEASE;
1024
1025 netdev_change_features(team->dev);
1026}
1027
1028static void team_compute_features(struct team *team)
1029{
1030 mutex_lock(&team->lock);
1031 __team_compute_features(team);
1032 mutex_unlock(&team->lock);
1033}
1034
1035static int team_port_enter(struct team *team, struct team_port *port)
1036{
1037 int err = 0;
1038
1039 dev_hold(team->dev);
1040 if (team->ops.port_enter) {
1041 err = team->ops.port_enter(team, port);
1042 if (err) {
1043 netdev_err(team->dev, "Device %s failed to enter team mode\n",
1044 port->dev->name);
1045 goto err_port_enter;
1046 }
1047 }
1048
1049 return 0;
1050
1051err_port_enter:
1052 dev_put(team->dev);
1053
1054 return err;
1055}
1056
1057static void team_port_leave(struct team *team, struct team_port *port)
1058{
1059 if (team->ops.port_leave)
1060 team->ops.port_leave(team, port);
1061 dev_put(team->dev);
1062}
1063
1064#ifdef CONFIG_NET_POLL_CONTROLLER
1065static int team_port_enable_netpoll(struct team *team, struct team_port *port)
1066{
1067 struct netpoll *np;
1068 int err;
1069
1070 if (!team->dev->npinfo)
1071 return 0;
1072
1073 np = kzalloc(sizeof(*np), GFP_KERNEL);
1074 if (!np)
1075 return -ENOMEM;
1076
1077 err = __netpoll_setup(np, port->dev);
1078 if (err) {
1079 kfree(np);
1080 return err;
1081 }
1082 port->np = np;
1083 return err;
1084}
1085
1086static void team_port_disable_netpoll(struct team_port *port)
1087{
1088 struct netpoll *np = port->np;
1089
1090 if (!np)
1091 return;
1092 port->np = NULL;
1093
1094 /* Wait for transmitting packets to finish before freeing. */
1095 synchronize_rcu_bh();
1096 __netpoll_cleanup(np);
1097 kfree(np);
1098}
1099#else
1100static int team_port_enable_netpoll(struct team *team, struct team_port *port)
1101{
1102 return 0;
1103}
1104static void team_port_disable_netpoll(struct team_port *port)
1105{
1106}
1107#endif
1108
1109static int team_upper_dev_link(struct team *team, struct team_port *port)
1110{
1111 struct netdev_lag_upper_info lag_upper_info;
1112 int err;
1113
1114 lag_upper_info.tx_type = team->mode->lag_tx_type;
1115 err = netdev_master_upper_dev_link(port->dev, team->dev, NULL,
1116 &lag_upper_info);
1117 if (err)
1118 return err;
1119 port->dev->priv_flags |= IFF_TEAM_PORT;
1120 return 0;
1121}
1122
1123static void team_upper_dev_unlink(struct team *team, struct team_port *port)
1124{
1125 netdev_upper_dev_unlink(port->dev, team->dev);
1126 port->dev->priv_flags &= ~IFF_TEAM_PORT;
1127}
1128
1129static void __team_port_change_port_added(struct team_port *port, bool linkup);
1130static int team_dev_type_check_change(struct net_device *dev,
1131 struct net_device *port_dev);
1132
1133static int team_port_add(struct team *team, struct net_device *port_dev)
1134{
1135 struct net_device *dev = team->dev;
1136 struct team_port *port;
1137 char *portname = port_dev->name;
1138 int err;
1139
1140 if (port_dev->flags & IFF_LOOPBACK) {
1141 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1142 portname);
1143 return -EINVAL;
1144 }
1145
1146 if (team_port_exists(port_dev)) {
1147 netdev_err(dev, "Device %s is already a port "
1148 "of a team device\n", portname);
1149 return -EBUSY;
1150 }
1151
1152 if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1153 vlan_uses_dev(dev)) {
1154 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1155 portname);
1156 return -EPERM;
1157 }
1158
1159 err = team_dev_type_check_change(dev, port_dev);
1160 if (err)
1161 return err;
1162
1163 if (port_dev->flags & IFF_UP) {
1164 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1165 portname);
1166 return -EBUSY;
1167 }
1168
1169 port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1170 GFP_KERNEL);
1171 if (!port)
1172 return -ENOMEM;
1173
1174 port->dev = port_dev;
1175 port->team = team;
1176 INIT_LIST_HEAD(&port->qom_list);
1177
1178 port->orig.mtu = port_dev->mtu;
1179 err = dev_set_mtu(port_dev, dev->mtu);
1180 if (err) {
1181 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1182 goto err_set_mtu;
1183 }
1184
1185 memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1186
1187 err = team_port_enter(team, port);
1188 if (err) {
1189 netdev_err(dev, "Device %s failed to enter team mode\n",
1190 portname);
1191 goto err_port_enter;
1192 }
1193
1194 err = dev_open(port_dev);
1195 if (err) {
1196 netdev_dbg(dev, "Device %s opening failed\n",
1197 portname);
1198 goto err_dev_open;
1199 }
1200
1201 dev_uc_sync_multiple(port_dev, dev);
1202 dev_mc_sync_multiple(port_dev, dev);
1203
1204 err = vlan_vids_add_by_dev(port_dev, dev);
1205 if (err) {
1206 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1207 portname);
1208 goto err_vids_add;
1209 }
1210
1211 err = team_port_enable_netpoll(team, port);
1212 if (err) {
1213 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1214 portname);
1215 goto err_enable_netpoll;
1216 }
1217
1218 if (!(dev->features & NETIF_F_LRO))
1219 dev_disable_lro(port_dev);
1220
1221 err = netdev_rx_handler_register(port_dev, team_handle_frame,
1222 port);
1223 if (err) {
1224 netdev_err(dev, "Device %s failed to register rx_handler\n",
1225 portname);
1226 goto err_handler_register;
1227 }
1228
1229 err = team_upper_dev_link(team, port);
1230 if (err) {
1231 netdev_err(dev, "Device %s failed to set upper link\n",
1232 portname);
1233 goto err_set_upper_link;
1234 }
1235
1236 err = __team_option_inst_add_port(team, port);
1237 if (err) {
1238 netdev_err(dev, "Device %s failed to add per-port options\n",
1239 portname);
1240 goto err_option_port_add;
1241 }
1242
1243 port->index = -1;
1244 list_add_tail_rcu(&port->list, &team->port_list);
1245 team_port_enable(team, port);
1246 __team_compute_features(team);
1247 __team_port_change_port_added(port, !!netif_carrier_ok(port_dev));
1248 __team_options_change_check(team);
1249
1250 netdev_info(dev, "Port device %s added\n", portname);
1251
1252 return 0;
1253
1254err_option_port_add:
1255 team_upper_dev_unlink(team, port);
1256
1257err_set_upper_link:
1258 netdev_rx_handler_unregister(port_dev);
1259
1260err_handler_register:
1261 team_port_disable_netpoll(port);
1262
1263err_enable_netpoll:
1264 vlan_vids_del_by_dev(port_dev, dev);
1265
1266err_vids_add:
1267 dev_uc_unsync(port_dev, dev);
1268 dev_mc_unsync(port_dev, dev);
1269 dev_close(port_dev);
1270
1271err_dev_open:
1272 team_port_leave(team, port);
1273 team_port_set_orig_dev_addr(port);
1274
1275err_port_enter:
1276 dev_set_mtu(port_dev, port->orig.mtu);
1277
1278err_set_mtu:
1279 kfree(port);
1280
1281 return err;
1282}
1283
1284static void __team_port_change_port_removed(struct team_port *port);
1285
1286static int team_port_del(struct team *team, struct net_device *port_dev)
1287{
1288 struct net_device *dev = team->dev;
1289 struct team_port *port;
1290 char *portname = port_dev->name;
1291
1292 port = team_port_get_rtnl(port_dev);
1293 if (!port || !team_port_find(team, port)) {
1294 netdev_err(dev, "Device %s does not act as a port of this team\n",
1295 portname);
1296 return -ENOENT;
1297 }
1298
1299 team_port_disable(team, port);
1300 list_del_rcu(&port->list);
1301 team_upper_dev_unlink(team, port);
1302 netdev_rx_handler_unregister(port_dev);
1303 team_port_disable_netpoll(port);
1304 vlan_vids_del_by_dev(port_dev, dev);
1305 dev_uc_unsync(port_dev, dev);
1306 dev_mc_unsync(port_dev, dev);
1307 dev_close(port_dev);
1308 team_port_leave(team, port);
1309
1310 __team_option_inst_mark_removed_port(team, port);
1311 __team_options_change_check(team);
1312 __team_option_inst_del_port(team, port);
1313 __team_port_change_port_removed(port);
1314
1315 team_port_set_orig_dev_addr(port);
1316 dev_set_mtu(port_dev, port->orig.mtu);
1317 kfree_rcu(port, rcu);
1318 netdev_info(dev, "Port device %s removed\n", portname);
1319 __team_compute_features(team);
1320
1321 return 0;
1322}
1323
1324
1325/*****************
1326 * Net device ops
1327 *****************/
1328
1329static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1330{
1331 ctx->data.str_val = team->mode->kind;
1332 return 0;
1333}
1334
1335static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1336{
1337 return team_change_mode(team, ctx->data.str_val);
1338}
1339
1340static int team_notify_peers_count_get(struct team *team,
1341 struct team_gsetter_ctx *ctx)
1342{
1343 ctx->data.u32_val = team->notify_peers.count;
1344 return 0;
1345}
1346
1347static int team_notify_peers_count_set(struct team *team,
1348 struct team_gsetter_ctx *ctx)
1349{
1350 team->notify_peers.count = ctx->data.u32_val;
1351 return 0;
1352}
1353
1354static int team_notify_peers_interval_get(struct team *team,
1355 struct team_gsetter_ctx *ctx)
1356{
1357 ctx->data.u32_val = team->notify_peers.interval;
1358 return 0;
1359}
1360
1361static int team_notify_peers_interval_set(struct team *team,
1362 struct team_gsetter_ctx *ctx)
1363{
1364 team->notify_peers.interval = ctx->data.u32_val;
1365 return 0;
1366}
1367
1368static int team_mcast_rejoin_count_get(struct team *team,
1369 struct team_gsetter_ctx *ctx)
1370{
1371 ctx->data.u32_val = team->mcast_rejoin.count;
1372 return 0;
1373}
1374
1375static int team_mcast_rejoin_count_set(struct team *team,
1376 struct team_gsetter_ctx *ctx)
1377{
1378 team->mcast_rejoin.count = ctx->data.u32_val;
1379 return 0;
1380}
1381
1382static int team_mcast_rejoin_interval_get(struct team *team,
1383 struct team_gsetter_ctx *ctx)
1384{
1385 ctx->data.u32_val = team->mcast_rejoin.interval;
1386 return 0;
1387}
1388
1389static int team_mcast_rejoin_interval_set(struct team *team,
1390 struct team_gsetter_ctx *ctx)
1391{
1392 team->mcast_rejoin.interval = ctx->data.u32_val;
1393 return 0;
1394}
1395
1396static int team_port_en_option_get(struct team *team,
1397 struct team_gsetter_ctx *ctx)
1398{
1399 struct team_port *port = ctx->info->port;
1400
1401 ctx->data.bool_val = team_port_enabled(port);
1402 return 0;
1403}
1404
1405static int team_port_en_option_set(struct team *team,
1406 struct team_gsetter_ctx *ctx)
1407{
1408 struct team_port *port = ctx->info->port;
1409
1410 if (ctx->data.bool_val)
1411 team_port_enable(team, port);
1412 else
1413 team_port_disable(team, port);
1414 return 0;
1415}
1416
1417static int team_user_linkup_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 = port->user.linkup;
1423 return 0;
1424}
1425
1426static void __team_carrier_check(struct team *team);
1427
1428static int team_user_linkup_option_set(struct team *team,
1429 struct team_gsetter_ctx *ctx)
1430{
1431 struct team_port *port = ctx->info->port;
1432
1433 port->user.linkup = ctx->data.bool_val;
1434 team_refresh_port_linkup(port);
1435 __team_carrier_check(port->team);
1436 return 0;
1437}
1438
1439static int team_user_linkup_en_option_get(struct team *team,
1440 struct team_gsetter_ctx *ctx)
1441{
1442 struct team_port *port = ctx->info->port;
1443
1444 ctx->data.bool_val = port->user.linkup_enabled;
1445 return 0;
1446}
1447
1448static int team_user_linkup_en_option_set(struct team *team,
1449 struct team_gsetter_ctx *ctx)
1450{
1451 struct team_port *port = ctx->info->port;
1452
1453 port->user.linkup_enabled = ctx->data.bool_val;
1454 team_refresh_port_linkup(port);
1455 __team_carrier_check(port->team);
1456 return 0;
1457}
1458
1459static int team_priority_option_get(struct team *team,
1460 struct team_gsetter_ctx *ctx)
1461{
1462 struct team_port *port = ctx->info->port;
1463
1464 ctx->data.s32_val = port->priority;
1465 return 0;
1466}
1467
1468static int team_priority_option_set(struct team *team,
1469 struct team_gsetter_ctx *ctx)
1470{
1471 struct team_port *port = ctx->info->port;
1472 s32 priority = ctx->data.s32_val;
1473
1474 if (port->priority == priority)
1475 return 0;
1476 port->priority = priority;
1477 team_queue_override_port_prio_changed(team, port);
1478 return 0;
1479}
1480
1481static int team_queue_id_option_get(struct team *team,
1482 struct team_gsetter_ctx *ctx)
1483{
1484 struct team_port *port = ctx->info->port;
1485
1486 ctx->data.u32_val = port->queue_id;
1487 return 0;
1488}
1489
1490static int team_queue_id_option_set(struct team *team,
1491 struct team_gsetter_ctx *ctx)
1492{
1493 struct team_port *port = ctx->info->port;
1494 u16 new_queue_id = ctx->data.u32_val;
1495
1496 if (port->queue_id == new_queue_id)
1497 return 0;
1498 if (new_queue_id >= team->dev->real_num_tx_queues)
1499 return -EINVAL;
1500 team_queue_override_port_change_queue_id(team, port, new_queue_id);
1501 return 0;
1502}
1503
1504static const struct team_option team_options[] = {
1505 {
1506 .name = "mode",
1507 .type = TEAM_OPTION_TYPE_STRING,
1508 .getter = team_mode_option_get,
1509 .setter = team_mode_option_set,
1510 },
1511 {
1512 .name = "notify_peers_count",
1513 .type = TEAM_OPTION_TYPE_U32,
1514 .getter = team_notify_peers_count_get,
1515 .setter = team_notify_peers_count_set,
1516 },
1517 {
1518 .name = "notify_peers_interval",
1519 .type = TEAM_OPTION_TYPE_U32,
1520 .getter = team_notify_peers_interval_get,
1521 .setter = team_notify_peers_interval_set,
1522 },
1523 {
1524 .name = "mcast_rejoin_count",
1525 .type = TEAM_OPTION_TYPE_U32,
1526 .getter = team_mcast_rejoin_count_get,
1527 .setter = team_mcast_rejoin_count_set,
1528 },
1529 {
1530 .name = "mcast_rejoin_interval",
1531 .type = TEAM_OPTION_TYPE_U32,
1532 .getter = team_mcast_rejoin_interval_get,
1533 .setter = team_mcast_rejoin_interval_set,
1534 },
1535 {
1536 .name = "enabled",
1537 .type = TEAM_OPTION_TYPE_BOOL,
1538 .per_port = true,
1539 .getter = team_port_en_option_get,
1540 .setter = team_port_en_option_set,
1541 },
1542 {
1543 .name = "user_linkup",
1544 .type = TEAM_OPTION_TYPE_BOOL,
1545 .per_port = true,
1546 .getter = team_user_linkup_option_get,
1547 .setter = team_user_linkup_option_set,
1548 },
1549 {
1550 .name = "user_linkup_enabled",
1551 .type = TEAM_OPTION_TYPE_BOOL,
1552 .per_port = true,
1553 .getter = team_user_linkup_en_option_get,
1554 .setter = team_user_linkup_en_option_set,
1555 },
1556 {
1557 .name = "priority",
1558 .type = TEAM_OPTION_TYPE_S32,
1559 .per_port = true,
1560 .getter = team_priority_option_get,
1561 .setter = team_priority_option_set,
1562 },
1563 {
1564 .name = "queue_id",
1565 .type = TEAM_OPTION_TYPE_U32,
1566 .per_port = true,
1567 .getter = team_queue_id_option_get,
1568 .setter = team_queue_id_option_set,
1569 },
1570};
1571
1572static struct lock_class_key team_netdev_xmit_lock_key;
1573static struct lock_class_key team_netdev_addr_lock_key;
1574static struct lock_class_key team_tx_busylock_key;
1575
1576static void team_set_lockdep_class_one(struct net_device *dev,
1577 struct netdev_queue *txq,
1578 void *unused)
1579{
1580 lockdep_set_class(&txq->_xmit_lock, &team_netdev_xmit_lock_key);
1581}
1582
1583static void team_set_lockdep_class(struct net_device *dev)
1584{
1585 lockdep_set_class(&dev->addr_list_lock, &team_netdev_addr_lock_key);
1586 netdev_for_each_tx_queue(dev, team_set_lockdep_class_one, NULL);
1587 dev->qdisc_tx_busylock = &team_tx_busylock_key;
1588}
1589
1590static int team_init(struct net_device *dev)
1591{
1592 struct team *team = netdev_priv(dev);
1593 int i;
1594 int err;
1595
1596 team->dev = dev;
1597 mutex_init(&team->lock);
1598 team_set_no_mode(team);
1599
1600 team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1601 if (!team->pcpu_stats)
1602 return -ENOMEM;
1603
1604 for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1605 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1606 INIT_LIST_HEAD(&team->port_list);
1607 err = team_queue_override_init(team);
1608 if (err)
1609 goto err_team_queue_override_init;
1610
1611 team_adjust_ops(team);
1612
1613 INIT_LIST_HEAD(&team->option_list);
1614 INIT_LIST_HEAD(&team->option_inst_list);
1615
1616 team_notify_peers_init(team);
1617 team_mcast_rejoin_init(team);
1618
1619 err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1620 if (err)
1621 goto err_options_register;
1622 netif_carrier_off(dev);
1623
1624 team_set_lockdep_class(dev);
1625
1626 return 0;
1627
1628err_options_register:
1629 team_mcast_rejoin_fini(team);
1630 team_notify_peers_fini(team);
1631 team_queue_override_fini(team);
1632err_team_queue_override_init:
1633 free_percpu(team->pcpu_stats);
1634
1635 return err;
1636}
1637
1638static void team_uninit(struct net_device *dev)
1639{
1640 struct team *team = netdev_priv(dev);
1641 struct team_port *port;
1642 struct team_port *tmp;
1643
1644 mutex_lock(&team->lock);
1645 list_for_each_entry_safe(port, tmp, &team->port_list, list)
1646 team_port_del(team, port->dev);
1647
1648 __team_change_mode(team, NULL); /* cleanup */
1649 __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1650 team_mcast_rejoin_fini(team);
1651 team_notify_peers_fini(team);
1652 team_queue_override_fini(team);
1653 mutex_unlock(&team->lock);
1654}
1655
1656static void team_destructor(struct net_device *dev)
1657{
1658 struct team *team = netdev_priv(dev);
1659
1660 free_percpu(team->pcpu_stats);
1661 free_netdev(dev);
1662}
1663
1664static int team_open(struct net_device *dev)
1665{
1666 return 0;
1667}
1668
1669static int team_close(struct net_device *dev)
1670{
1671 return 0;
1672}
1673
1674/*
1675 * note: already called with rcu_read_lock
1676 */
1677static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1678{
1679 struct team *team = netdev_priv(dev);
1680 bool tx_success;
1681 unsigned int len = skb->len;
1682
1683 tx_success = team_queue_override_transmit(team, skb);
1684 if (!tx_success)
1685 tx_success = team->ops.transmit(team, skb);
1686 if (tx_success) {
1687 struct team_pcpu_stats *pcpu_stats;
1688
1689 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1690 u64_stats_update_begin(&pcpu_stats->syncp);
1691 pcpu_stats->tx_packets++;
1692 pcpu_stats->tx_bytes += len;
1693 u64_stats_update_end(&pcpu_stats->syncp);
1694 } else {
1695 this_cpu_inc(team->pcpu_stats->tx_dropped);
1696 }
1697
1698 return NETDEV_TX_OK;
1699}
1700
1701static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1702 void *accel_priv, select_queue_fallback_t fallback)
1703{
1704 /*
1705 * This helper function exists to help dev_pick_tx get the correct
1706 * destination queue. Using a helper function skips a call to
1707 * skb_tx_hash and will put the skbs in the queue we expect on their
1708 * way down to the team driver.
1709 */
1710 u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1711
1712 /*
1713 * Save the original txq to restore before passing to the driver
1714 */
1715 qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1716
1717 if (unlikely(txq >= dev->real_num_tx_queues)) {
1718 do {
1719 txq -= dev->real_num_tx_queues;
1720 } while (txq >= dev->real_num_tx_queues);
1721 }
1722 return txq;
1723}
1724
1725static void team_change_rx_flags(struct net_device *dev, int change)
1726{
1727 struct team *team = netdev_priv(dev);
1728 struct team_port *port;
1729 int inc;
1730
1731 rcu_read_lock();
1732 list_for_each_entry_rcu(port, &team->port_list, list) {
1733 if (change & IFF_PROMISC) {
1734 inc = dev->flags & IFF_PROMISC ? 1 : -1;
1735 dev_set_promiscuity(port->dev, inc);
1736 }
1737 if (change & IFF_ALLMULTI) {
1738 inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1739 dev_set_allmulti(port->dev, inc);
1740 }
1741 }
1742 rcu_read_unlock();
1743}
1744
1745static void team_set_rx_mode(struct net_device *dev)
1746{
1747 struct team *team = netdev_priv(dev);
1748 struct team_port *port;
1749
1750 rcu_read_lock();
1751 list_for_each_entry_rcu(port, &team->port_list, list) {
1752 dev_uc_sync_multiple(port->dev, dev);
1753 dev_mc_sync_multiple(port->dev, dev);
1754 }
1755 rcu_read_unlock();
1756}
1757
1758static int team_set_mac_address(struct net_device *dev, void *p)
1759{
1760 struct sockaddr *addr = p;
1761 struct team *team = netdev_priv(dev);
1762 struct team_port *port;
1763
1764 if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1765 return -EADDRNOTAVAIL;
1766 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1767 mutex_lock(&team->lock);
1768 list_for_each_entry(port, &team->port_list, list)
1769 if (team->ops.port_change_dev_addr)
1770 team->ops.port_change_dev_addr(team, port);
1771 mutex_unlock(&team->lock);
1772 return 0;
1773}
1774
1775static int team_change_mtu(struct net_device *dev, int new_mtu)
1776{
1777 struct team *team = netdev_priv(dev);
1778 struct team_port *port;
1779 int err;
1780
1781 /*
1782 * Alhough this is reader, it's guarded by team lock. It's not possible
1783 * to traverse list in reverse under rcu_read_lock
1784 */
1785 mutex_lock(&team->lock);
1786 team->port_mtu_change_allowed = true;
1787 list_for_each_entry(port, &team->port_list, list) {
1788 err = dev_set_mtu(port->dev, new_mtu);
1789 if (err) {
1790 netdev_err(dev, "Device %s failed to change mtu",
1791 port->dev->name);
1792 goto unwind;
1793 }
1794 }
1795 team->port_mtu_change_allowed = false;
1796 mutex_unlock(&team->lock);
1797
1798 dev->mtu = new_mtu;
1799
1800 return 0;
1801
1802unwind:
1803 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1804 dev_set_mtu(port->dev, dev->mtu);
1805 team->port_mtu_change_allowed = false;
1806 mutex_unlock(&team->lock);
1807
1808 return err;
1809}
1810
1811static struct rtnl_link_stats64 *
1812team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1813{
1814 struct team *team = netdev_priv(dev);
1815 struct team_pcpu_stats *p;
1816 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1817 u32 rx_dropped = 0, tx_dropped = 0, rx_nohandler = 0;
1818 unsigned int start;
1819 int i;
1820
1821 for_each_possible_cpu(i) {
1822 p = per_cpu_ptr(team->pcpu_stats, i);
1823 do {
1824 start = u64_stats_fetch_begin_irq(&p->syncp);
1825 rx_packets = p->rx_packets;
1826 rx_bytes = p->rx_bytes;
1827 rx_multicast = p->rx_multicast;
1828 tx_packets = p->tx_packets;
1829 tx_bytes = p->tx_bytes;
1830 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
1831
1832 stats->rx_packets += rx_packets;
1833 stats->rx_bytes += rx_bytes;
1834 stats->multicast += rx_multicast;
1835 stats->tx_packets += tx_packets;
1836 stats->tx_bytes += tx_bytes;
1837 /*
1838 * rx_dropped, tx_dropped & rx_nohandler are u32,
1839 * updated without syncp protection.
1840 */
1841 rx_dropped += p->rx_dropped;
1842 tx_dropped += p->tx_dropped;
1843 rx_nohandler += p->rx_nohandler;
1844 }
1845 stats->rx_dropped = rx_dropped;
1846 stats->tx_dropped = tx_dropped;
1847 stats->rx_nohandler = rx_nohandler;
1848 return stats;
1849}
1850
1851static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1852{
1853 struct team *team = netdev_priv(dev);
1854 struct team_port *port;
1855 int err;
1856
1857 /*
1858 * Alhough this is reader, it's guarded by team lock. It's not possible
1859 * to traverse list in reverse under rcu_read_lock
1860 */
1861 mutex_lock(&team->lock);
1862 list_for_each_entry(port, &team->port_list, list) {
1863 err = vlan_vid_add(port->dev, proto, vid);
1864 if (err)
1865 goto unwind;
1866 }
1867 mutex_unlock(&team->lock);
1868
1869 return 0;
1870
1871unwind:
1872 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1873 vlan_vid_del(port->dev, proto, vid);
1874 mutex_unlock(&team->lock);
1875
1876 return err;
1877}
1878
1879static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1880{
1881 struct team *team = netdev_priv(dev);
1882 struct team_port *port;
1883
1884 mutex_lock(&team->lock);
1885 list_for_each_entry(port, &team->port_list, list)
1886 vlan_vid_del(port->dev, proto, vid);
1887 mutex_unlock(&team->lock);
1888
1889 return 0;
1890}
1891
1892#ifdef CONFIG_NET_POLL_CONTROLLER
1893static void team_poll_controller(struct net_device *dev)
1894{
1895}
1896
1897static void __team_netpoll_cleanup(struct team *team)
1898{
1899 struct team_port *port;
1900
1901 list_for_each_entry(port, &team->port_list, list)
1902 team_port_disable_netpoll(port);
1903}
1904
1905static void team_netpoll_cleanup(struct net_device *dev)
1906{
1907 struct team *team = netdev_priv(dev);
1908
1909 mutex_lock(&team->lock);
1910 __team_netpoll_cleanup(team);
1911 mutex_unlock(&team->lock);
1912}
1913
1914static int team_netpoll_setup(struct net_device *dev,
1915 struct netpoll_info *npifo)
1916{
1917 struct team *team = netdev_priv(dev);
1918 struct team_port *port;
1919 int err = 0;
1920
1921 mutex_lock(&team->lock);
1922 list_for_each_entry(port, &team->port_list, list) {
1923 err = team_port_enable_netpoll(team, port);
1924 if (err) {
1925 __team_netpoll_cleanup(team);
1926 break;
1927 }
1928 }
1929 mutex_unlock(&team->lock);
1930 return err;
1931}
1932#endif
1933
1934static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
1935{
1936 struct team *team = netdev_priv(dev);
1937 int err;
1938
1939 mutex_lock(&team->lock);
1940 err = team_port_add(team, port_dev);
1941 mutex_unlock(&team->lock);
1942 return err;
1943}
1944
1945static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1946{
1947 struct team *team = netdev_priv(dev);
1948 int err;
1949
1950 mutex_lock(&team->lock);
1951 err = team_port_del(team, port_dev);
1952 mutex_unlock(&team->lock);
1953 return err;
1954}
1955
1956static netdev_features_t team_fix_features(struct net_device *dev,
1957 netdev_features_t features)
1958{
1959 struct team_port *port;
1960 struct team *team = netdev_priv(dev);
1961 netdev_features_t mask;
1962
1963 mask = features;
1964 features &= ~NETIF_F_ONE_FOR_ALL;
1965 features |= NETIF_F_ALL_FOR_ALL;
1966
1967 rcu_read_lock();
1968 list_for_each_entry_rcu(port, &team->port_list, list) {
1969 features = netdev_increment_features(features,
1970 port->dev->features,
1971 mask);
1972 }
1973 rcu_read_unlock();
1974
1975 features = netdev_add_tso_features(features, mask);
1976
1977 return features;
1978}
1979
1980static int team_change_carrier(struct net_device *dev, bool new_carrier)
1981{
1982 struct team *team = netdev_priv(dev);
1983
1984 team->user_carrier_enabled = true;
1985
1986 if (new_carrier)
1987 netif_carrier_on(dev);
1988 else
1989 netif_carrier_off(dev);
1990 return 0;
1991}
1992
1993static const struct net_device_ops team_netdev_ops = {
1994 .ndo_init = team_init,
1995 .ndo_uninit = team_uninit,
1996 .ndo_open = team_open,
1997 .ndo_stop = team_close,
1998 .ndo_start_xmit = team_xmit,
1999 .ndo_select_queue = team_select_queue,
2000 .ndo_change_rx_flags = team_change_rx_flags,
2001 .ndo_set_rx_mode = team_set_rx_mode,
2002 .ndo_set_mac_address = team_set_mac_address,
2003 .ndo_change_mtu = team_change_mtu,
2004 .ndo_get_stats64 = team_get_stats64,
2005 .ndo_vlan_rx_add_vid = team_vlan_rx_add_vid,
2006 .ndo_vlan_rx_kill_vid = team_vlan_rx_kill_vid,
2007#ifdef CONFIG_NET_POLL_CONTROLLER
2008 .ndo_poll_controller = team_poll_controller,
2009 .ndo_netpoll_setup = team_netpoll_setup,
2010 .ndo_netpoll_cleanup = team_netpoll_cleanup,
2011#endif
2012 .ndo_add_slave = team_add_slave,
2013 .ndo_del_slave = team_del_slave,
2014 .ndo_fix_features = team_fix_features,
2015 .ndo_change_carrier = team_change_carrier,
2016 .ndo_bridge_setlink = switchdev_port_bridge_setlink,
2017 .ndo_bridge_getlink = switchdev_port_bridge_getlink,
2018 .ndo_bridge_dellink = switchdev_port_bridge_dellink,
2019 .ndo_fdb_add = switchdev_port_fdb_add,
2020 .ndo_fdb_del = switchdev_port_fdb_del,
2021 .ndo_fdb_dump = switchdev_port_fdb_dump,
2022 .ndo_features_check = passthru_features_check,
2023};
2024
2025/***********************
2026 * ethtool interface
2027 ***********************/
2028
2029static void team_ethtool_get_drvinfo(struct net_device *dev,
2030 struct ethtool_drvinfo *drvinfo)
2031{
2032 strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
2033 strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2034}
2035
2036static const struct ethtool_ops team_ethtool_ops = {
2037 .get_drvinfo = team_ethtool_get_drvinfo,
2038 .get_link = ethtool_op_get_link,
2039};
2040
2041/***********************
2042 * rt netlink interface
2043 ***********************/
2044
2045static void team_setup_by_port(struct net_device *dev,
2046 struct net_device *port_dev)
2047{
2048 dev->header_ops = port_dev->header_ops;
2049 dev->type = port_dev->type;
2050 dev->hard_header_len = port_dev->hard_header_len;
2051 dev->addr_len = port_dev->addr_len;
2052 dev->mtu = port_dev->mtu;
2053 memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2054 eth_hw_addr_inherit(dev, port_dev);
2055}
2056
2057static int team_dev_type_check_change(struct net_device *dev,
2058 struct net_device *port_dev)
2059{
2060 struct team *team = netdev_priv(dev);
2061 char *portname = port_dev->name;
2062 int err;
2063
2064 if (dev->type == port_dev->type)
2065 return 0;
2066 if (!list_empty(&team->port_list)) {
2067 netdev_err(dev, "Device %s is of different type\n", portname);
2068 return -EBUSY;
2069 }
2070 err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2071 err = notifier_to_errno(err);
2072 if (err) {
2073 netdev_err(dev, "Refused to change device type\n");
2074 return err;
2075 }
2076 dev_uc_flush(dev);
2077 dev_mc_flush(dev);
2078 team_setup_by_port(dev, port_dev);
2079 call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2080 return 0;
2081}
2082
2083static void team_setup(struct net_device *dev)
2084{
2085 ether_setup(dev);
2086
2087 dev->netdev_ops = &team_netdev_ops;
2088 dev->ethtool_ops = &team_ethtool_ops;
2089 dev->destructor = team_destructor;
2090 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2091 dev->priv_flags |= IFF_NO_QUEUE;
2092 dev->priv_flags |= IFF_TEAM;
2093
2094 /*
2095 * Indicate we support unicast address filtering. That way core won't
2096 * bring us to promisc mode in case a unicast addr is added.
2097 * Let this up to underlay drivers.
2098 */
2099 dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2100
2101 dev->features |= NETIF_F_LLTX;
2102 dev->features |= NETIF_F_GRO;
2103
2104 /* Don't allow team devices to change network namespaces. */
2105 dev->features |= NETIF_F_NETNS_LOCAL;
2106
2107 dev->hw_features = TEAM_VLAN_FEATURES |
2108 NETIF_F_HW_VLAN_CTAG_TX |
2109 NETIF_F_HW_VLAN_CTAG_RX |
2110 NETIF_F_HW_VLAN_CTAG_FILTER;
2111
2112 dev->hw_features |= NETIF_F_GSO_ENCAP_ALL;
2113 dev->features |= dev->hw_features;
2114}
2115
2116static int team_newlink(struct net *src_net, struct net_device *dev,
2117 struct nlattr *tb[], struct nlattr *data[])
2118{
2119 if (tb[IFLA_ADDRESS] == NULL)
2120 eth_hw_addr_random(dev);
2121
2122 return register_netdevice(dev);
2123}
2124
2125static int team_validate(struct nlattr *tb[], struct nlattr *data[])
2126{
2127 if (tb[IFLA_ADDRESS]) {
2128 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2129 return -EINVAL;
2130 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2131 return -EADDRNOTAVAIL;
2132 }
2133 return 0;
2134}
2135
2136static unsigned int team_get_num_tx_queues(void)
2137{
2138 return TEAM_DEFAULT_NUM_TX_QUEUES;
2139}
2140
2141static unsigned int team_get_num_rx_queues(void)
2142{
2143 return TEAM_DEFAULT_NUM_RX_QUEUES;
2144}
2145
2146static struct rtnl_link_ops team_link_ops __read_mostly = {
2147 .kind = DRV_NAME,
2148 .priv_size = sizeof(struct team),
2149 .setup = team_setup,
2150 .newlink = team_newlink,
2151 .validate = team_validate,
2152 .get_num_tx_queues = team_get_num_tx_queues,
2153 .get_num_rx_queues = team_get_num_rx_queues,
2154};
2155
2156
2157/***********************************
2158 * Generic netlink custom interface
2159 ***********************************/
2160
2161static struct genl_family team_nl_family = {
2162 .id = GENL_ID_GENERATE,
2163 .name = TEAM_GENL_NAME,
2164 .version = TEAM_GENL_VERSION,
2165 .maxattr = TEAM_ATTR_MAX,
2166 .netnsok = true,
2167};
2168
2169static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2170 [TEAM_ATTR_UNSPEC] = { .type = NLA_UNSPEC, },
2171 [TEAM_ATTR_TEAM_IFINDEX] = { .type = NLA_U32 },
2172 [TEAM_ATTR_LIST_OPTION] = { .type = NLA_NESTED },
2173 [TEAM_ATTR_LIST_PORT] = { .type = NLA_NESTED },
2174};
2175
2176static const struct nla_policy
2177team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2178 [TEAM_ATTR_OPTION_UNSPEC] = { .type = NLA_UNSPEC, },
2179 [TEAM_ATTR_OPTION_NAME] = {
2180 .type = NLA_STRING,
2181 .len = TEAM_STRING_MAX_LEN,
2182 },
2183 [TEAM_ATTR_OPTION_CHANGED] = { .type = NLA_FLAG },
2184 [TEAM_ATTR_OPTION_TYPE] = { .type = NLA_U8 },
2185 [TEAM_ATTR_OPTION_DATA] = { .type = NLA_BINARY },
2186};
2187
2188static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2189{
2190 struct sk_buff *msg;
2191 void *hdr;
2192 int err;
2193
2194 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2195 if (!msg)
2196 return -ENOMEM;
2197
2198 hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2199 &team_nl_family, 0, TEAM_CMD_NOOP);
2200 if (!hdr) {
2201 err = -EMSGSIZE;
2202 goto err_msg_put;
2203 }
2204
2205 genlmsg_end(msg, hdr);
2206
2207 return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2208
2209err_msg_put:
2210 nlmsg_free(msg);
2211
2212 return err;
2213}
2214
2215/*
2216 * Netlink cmd functions should be locked by following two functions.
2217 * Since dev gets held here, that ensures dev won't disappear in between.
2218 */
2219static struct team *team_nl_team_get(struct genl_info *info)
2220{
2221 struct net *net = genl_info_net(info);
2222 int ifindex;
2223 struct net_device *dev;
2224 struct team *team;
2225
2226 if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2227 return NULL;
2228
2229 ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2230 dev = dev_get_by_index(net, ifindex);
2231 if (!dev || dev->netdev_ops != &team_netdev_ops) {
2232 if (dev)
2233 dev_put(dev);
2234 return NULL;
2235 }
2236
2237 team = netdev_priv(dev);
2238 mutex_lock(&team->lock);
2239 return team;
2240}
2241
2242static void team_nl_team_put(struct team *team)
2243{
2244 mutex_unlock(&team->lock);
2245 dev_put(team->dev);
2246}
2247
2248typedef int team_nl_send_func_t(struct sk_buff *skb,
2249 struct team *team, u32 portid);
2250
2251static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2252{
2253 return genlmsg_unicast(dev_net(team->dev), skb, portid);
2254}
2255
2256static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2257 struct team_option_inst *opt_inst)
2258{
2259 struct nlattr *option_item;
2260 struct team_option *option = opt_inst->option;
2261 struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2262 struct team_gsetter_ctx ctx;
2263 int err;
2264
2265 ctx.info = opt_inst_info;
2266 err = team_option_get(team, opt_inst, &ctx);
2267 if (err)
2268 return err;
2269
2270 option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
2271 if (!option_item)
2272 return -EMSGSIZE;
2273
2274 if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2275 goto nest_cancel;
2276 if (opt_inst_info->port &&
2277 nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2278 opt_inst_info->port->dev->ifindex))
2279 goto nest_cancel;
2280 if (opt_inst->option->array_size &&
2281 nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2282 opt_inst_info->array_index))
2283 goto nest_cancel;
2284
2285 switch (option->type) {
2286 case TEAM_OPTION_TYPE_U32:
2287 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2288 goto nest_cancel;
2289 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2290 goto nest_cancel;
2291 break;
2292 case TEAM_OPTION_TYPE_STRING:
2293 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2294 goto nest_cancel;
2295 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2296 ctx.data.str_val))
2297 goto nest_cancel;
2298 break;
2299 case TEAM_OPTION_TYPE_BINARY:
2300 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2301 goto nest_cancel;
2302 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2303 ctx.data.bin_val.ptr))
2304 goto nest_cancel;
2305 break;
2306 case TEAM_OPTION_TYPE_BOOL:
2307 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2308 goto nest_cancel;
2309 if (ctx.data.bool_val &&
2310 nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2311 goto nest_cancel;
2312 break;
2313 case TEAM_OPTION_TYPE_S32:
2314 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2315 goto nest_cancel;
2316 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2317 goto nest_cancel;
2318 break;
2319 default:
2320 BUG();
2321 }
2322 if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2323 goto nest_cancel;
2324 if (opt_inst->changed) {
2325 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2326 goto nest_cancel;
2327 opt_inst->changed = false;
2328 }
2329 nla_nest_end(skb, option_item);
2330 return 0;
2331
2332nest_cancel:
2333 nla_nest_cancel(skb, option_item);
2334 return -EMSGSIZE;
2335}
2336
2337static int __send_and_alloc_skb(struct sk_buff **pskb,
2338 struct team *team, u32 portid,
2339 team_nl_send_func_t *send_func)
2340{
2341 int err;
2342
2343 if (*pskb) {
2344 err = send_func(*pskb, team, portid);
2345 if (err)
2346 return err;
2347 }
2348 *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2349 if (!*pskb)
2350 return -ENOMEM;
2351 return 0;
2352}
2353
2354static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2355 int flags, team_nl_send_func_t *send_func,
2356 struct list_head *sel_opt_inst_list)
2357{
2358 struct nlattr *option_list;
2359 struct nlmsghdr *nlh;
2360 void *hdr;
2361 struct team_option_inst *opt_inst;
2362 int err;
2363 struct sk_buff *skb = NULL;
2364 bool incomplete;
2365 int i;
2366
2367 opt_inst = list_first_entry(sel_opt_inst_list,
2368 struct team_option_inst, tmp_list);
2369
2370start_again:
2371 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2372 if (err)
2373 return err;
2374
2375 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2376 TEAM_CMD_OPTIONS_GET);
2377 if (!hdr)
2378 return -EMSGSIZE;
2379
2380 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2381 goto nla_put_failure;
2382 option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2383 if (!option_list)
2384 goto nla_put_failure;
2385
2386 i = 0;
2387 incomplete = false;
2388 list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2389 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2390 if (err) {
2391 if (err == -EMSGSIZE) {
2392 if (!i)
2393 goto errout;
2394 incomplete = true;
2395 break;
2396 }
2397 goto errout;
2398 }
2399 i++;
2400 }
2401
2402 nla_nest_end(skb, option_list);
2403 genlmsg_end(skb, hdr);
2404 if (incomplete)
2405 goto start_again;
2406
2407send_done:
2408 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2409 if (!nlh) {
2410 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2411 if (err)
2412 goto errout;
2413 goto send_done;
2414 }
2415
2416 return send_func(skb, team, portid);
2417
2418nla_put_failure:
2419 err = -EMSGSIZE;
2420errout:
2421 genlmsg_cancel(skb, hdr);
2422 nlmsg_free(skb);
2423 return err;
2424}
2425
2426static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2427{
2428 struct team *team;
2429 struct team_option_inst *opt_inst;
2430 int err;
2431 LIST_HEAD(sel_opt_inst_list);
2432
2433 team = team_nl_team_get(info);
2434 if (!team)
2435 return -EINVAL;
2436
2437 list_for_each_entry(opt_inst, &team->option_inst_list, list)
2438 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2439 err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2440 NLM_F_ACK, team_nl_send_unicast,
2441 &sel_opt_inst_list);
2442
2443 team_nl_team_put(team);
2444
2445 return err;
2446}
2447
2448static int team_nl_send_event_options_get(struct team *team,
2449 struct list_head *sel_opt_inst_list);
2450
2451static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2452{
2453 struct team *team;
2454 int err = 0;
2455 int i;
2456 struct nlattr *nl_option;
2457 LIST_HEAD(opt_inst_list);
2458
2459 rtnl_lock();
2460
2461 team = team_nl_team_get(info);
2462 if (!team) {
2463 err = -EINVAL;
2464 goto rtnl_unlock;
2465 }
2466
2467 err = -EINVAL;
2468 if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2469 err = -EINVAL;
2470 goto team_put;
2471 }
2472
2473 nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2474 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2475 struct nlattr *attr;
2476 struct nlattr *attr_data;
2477 enum team_option_type opt_type;
2478 int opt_port_ifindex = 0; /* != 0 for per-port options */
2479 u32 opt_array_index = 0;
2480 bool opt_is_array = false;
2481 struct team_option_inst *opt_inst;
2482 char *opt_name;
2483 bool opt_found = false;
2484
2485 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2486 err = -EINVAL;
2487 goto team_put;
2488 }
2489 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2490 nl_option, team_nl_option_policy);
2491 if (err)
2492 goto team_put;
2493 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2494 !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2495 err = -EINVAL;
2496 goto team_put;
2497 }
2498 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2499 case NLA_U32:
2500 opt_type = TEAM_OPTION_TYPE_U32;
2501 break;
2502 case NLA_STRING:
2503 opt_type = TEAM_OPTION_TYPE_STRING;
2504 break;
2505 case NLA_BINARY:
2506 opt_type = TEAM_OPTION_TYPE_BINARY;
2507 break;
2508 case NLA_FLAG:
2509 opt_type = TEAM_OPTION_TYPE_BOOL;
2510 break;
2511 case NLA_S32:
2512 opt_type = TEAM_OPTION_TYPE_S32;
2513 break;
2514 default:
2515 goto team_put;
2516 }
2517
2518 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2519 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2520 err = -EINVAL;
2521 goto team_put;
2522 }
2523
2524 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2525 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2526 if (attr)
2527 opt_port_ifindex = nla_get_u32(attr);
2528
2529 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2530 if (attr) {
2531 opt_is_array = true;
2532 opt_array_index = nla_get_u32(attr);
2533 }
2534
2535 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2536 struct team_option *option = opt_inst->option;
2537 struct team_gsetter_ctx ctx;
2538 struct team_option_inst_info *opt_inst_info;
2539 int tmp_ifindex;
2540
2541 opt_inst_info = &opt_inst->info;
2542 tmp_ifindex = opt_inst_info->port ?
2543 opt_inst_info->port->dev->ifindex : 0;
2544 if (option->type != opt_type ||
2545 strcmp(option->name, opt_name) ||
2546 tmp_ifindex != opt_port_ifindex ||
2547 (option->array_size && !opt_is_array) ||
2548 opt_inst_info->array_index != opt_array_index)
2549 continue;
2550 opt_found = true;
2551 ctx.info = opt_inst_info;
2552 switch (opt_type) {
2553 case TEAM_OPTION_TYPE_U32:
2554 ctx.data.u32_val = nla_get_u32(attr_data);
2555 break;
2556 case TEAM_OPTION_TYPE_STRING:
2557 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2558 err = -EINVAL;
2559 goto team_put;
2560 }
2561 ctx.data.str_val = nla_data(attr_data);
2562 break;
2563 case TEAM_OPTION_TYPE_BINARY:
2564 ctx.data.bin_val.len = nla_len(attr_data);
2565 ctx.data.bin_val.ptr = nla_data(attr_data);
2566 break;
2567 case TEAM_OPTION_TYPE_BOOL:
2568 ctx.data.bool_val = attr_data ? true : false;
2569 break;
2570 case TEAM_OPTION_TYPE_S32:
2571 ctx.data.s32_val = nla_get_s32(attr_data);
2572 break;
2573 default:
2574 BUG();
2575 }
2576 err = team_option_set(team, opt_inst, &ctx);
2577 if (err)
2578 goto team_put;
2579 opt_inst->changed = true;
2580 list_add(&opt_inst->tmp_list, &opt_inst_list);
2581 }
2582 if (!opt_found) {
2583 err = -ENOENT;
2584 goto team_put;
2585 }
2586 }
2587
2588 err = team_nl_send_event_options_get(team, &opt_inst_list);
2589
2590team_put:
2591 team_nl_team_put(team);
2592rtnl_unlock:
2593 rtnl_unlock();
2594 return err;
2595}
2596
2597static int team_nl_fill_one_port_get(struct sk_buff *skb,
2598 struct team_port *port)
2599{
2600 struct nlattr *port_item;
2601
2602 port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2603 if (!port_item)
2604 goto nest_cancel;
2605 if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2606 goto nest_cancel;
2607 if (port->changed) {
2608 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2609 goto nest_cancel;
2610 port->changed = false;
2611 }
2612 if ((port->removed &&
2613 nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2614 (port->state.linkup &&
2615 nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2616 nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2617 nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2618 goto nest_cancel;
2619 nla_nest_end(skb, port_item);
2620 return 0;
2621
2622nest_cancel:
2623 nla_nest_cancel(skb, port_item);
2624 return -EMSGSIZE;
2625}
2626
2627static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2628 int flags, team_nl_send_func_t *send_func,
2629 struct team_port *one_port)
2630{
2631 struct nlattr *port_list;
2632 struct nlmsghdr *nlh;
2633 void *hdr;
2634 struct team_port *port;
2635 int err;
2636 struct sk_buff *skb = NULL;
2637 bool incomplete;
2638 int i;
2639
2640 port = list_first_entry_or_null(&team->port_list,
2641 struct team_port, list);
2642
2643start_again:
2644 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2645 if (err)
2646 return err;
2647
2648 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2649 TEAM_CMD_PORT_LIST_GET);
2650 if (!hdr)
2651 return -EMSGSIZE;
2652
2653 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2654 goto nla_put_failure;
2655 port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2656 if (!port_list)
2657 goto nla_put_failure;
2658
2659 i = 0;
2660 incomplete = false;
2661
2662 /* If one port is selected, called wants to send port list containing
2663 * only this port. Otherwise go through all listed ports and send all
2664 */
2665 if (one_port) {
2666 err = team_nl_fill_one_port_get(skb, one_port);
2667 if (err)
2668 goto errout;
2669 } else if (port) {
2670 list_for_each_entry_from(port, &team->port_list, list) {
2671 err = team_nl_fill_one_port_get(skb, port);
2672 if (err) {
2673 if (err == -EMSGSIZE) {
2674 if (!i)
2675 goto errout;
2676 incomplete = true;
2677 break;
2678 }
2679 goto errout;
2680 }
2681 i++;
2682 }
2683 }
2684
2685 nla_nest_end(skb, port_list);
2686 genlmsg_end(skb, hdr);
2687 if (incomplete)
2688 goto start_again;
2689
2690send_done:
2691 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2692 if (!nlh) {
2693 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2694 if (err)
2695 goto errout;
2696 goto send_done;
2697 }
2698
2699 return send_func(skb, team, portid);
2700
2701nla_put_failure:
2702 err = -EMSGSIZE;
2703errout:
2704 genlmsg_cancel(skb, hdr);
2705 nlmsg_free(skb);
2706 return err;
2707}
2708
2709static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2710 struct genl_info *info)
2711{
2712 struct team *team;
2713 int err;
2714
2715 team = team_nl_team_get(info);
2716 if (!team)
2717 return -EINVAL;
2718
2719 err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2720 NLM_F_ACK, team_nl_send_unicast, NULL);
2721
2722 team_nl_team_put(team);
2723
2724 return err;
2725}
2726
2727static const struct genl_ops team_nl_ops[] = {
2728 {
2729 .cmd = TEAM_CMD_NOOP,
2730 .doit = team_nl_cmd_noop,
2731 .policy = team_nl_policy,
2732 },
2733 {
2734 .cmd = TEAM_CMD_OPTIONS_SET,
2735 .doit = team_nl_cmd_options_set,
2736 .policy = team_nl_policy,
2737 .flags = GENL_ADMIN_PERM,
2738 },
2739 {
2740 .cmd = TEAM_CMD_OPTIONS_GET,
2741 .doit = team_nl_cmd_options_get,
2742 .policy = team_nl_policy,
2743 .flags = GENL_ADMIN_PERM,
2744 },
2745 {
2746 .cmd = TEAM_CMD_PORT_LIST_GET,
2747 .doit = team_nl_cmd_port_list_get,
2748 .policy = team_nl_policy,
2749 .flags = GENL_ADMIN_PERM,
2750 },
2751};
2752
2753static const struct genl_multicast_group team_nl_mcgrps[] = {
2754 { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2755};
2756
2757static int team_nl_send_multicast(struct sk_buff *skb,
2758 struct team *team, u32 portid)
2759{
2760 return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2761 skb, 0, 0, GFP_KERNEL);
2762}
2763
2764static int team_nl_send_event_options_get(struct team *team,
2765 struct list_head *sel_opt_inst_list)
2766{
2767 return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2768 sel_opt_inst_list);
2769}
2770
2771static int team_nl_send_event_port_get(struct team *team,
2772 struct team_port *port)
2773{
2774 return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2775 port);
2776}
2777
2778static int team_nl_init(void)
2779{
2780 return genl_register_family_with_ops_groups(&team_nl_family, team_nl_ops,
2781 team_nl_mcgrps);
2782}
2783
2784static void team_nl_fini(void)
2785{
2786 genl_unregister_family(&team_nl_family);
2787}
2788
2789
2790/******************
2791 * Change checkers
2792 ******************/
2793
2794static void __team_options_change_check(struct team *team)
2795{
2796 int err;
2797 struct team_option_inst *opt_inst;
2798 LIST_HEAD(sel_opt_inst_list);
2799
2800 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2801 if (opt_inst->changed)
2802 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2803 }
2804 err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2805 if (err && err != -ESRCH)
2806 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2807 err);
2808}
2809
2810/* rtnl lock is held */
2811
2812static void __team_port_change_send(struct team_port *port, bool linkup)
2813{
2814 int err;
2815
2816 port->changed = true;
2817 port->state.linkup = linkup;
2818 team_refresh_port_linkup(port);
2819 if (linkup) {
2820 struct ethtool_link_ksettings ecmd;
2821
2822 err = __ethtool_get_link_ksettings(port->dev, &ecmd);
2823 if (!err) {
2824 port->state.speed = ecmd.base.speed;
2825 port->state.duplex = ecmd.base.duplex;
2826 goto send_event;
2827 }
2828 }
2829 port->state.speed = 0;
2830 port->state.duplex = 0;
2831
2832send_event:
2833 err = team_nl_send_event_port_get(port->team, port);
2834 if (err && err != -ESRCH)
2835 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2836 port->dev->name, err);
2837
2838}
2839
2840static void __team_carrier_check(struct team *team)
2841{
2842 struct team_port *port;
2843 bool team_linkup;
2844
2845 if (team->user_carrier_enabled)
2846 return;
2847
2848 team_linkup = false;
2849 list_for_each_entry(port, &team->port_list, list) {
2850 if (port->linkup) {
2851 team_linkup = true;
2852 break;
2853 }
2854 }
2855
2856 if (team_linkup)
2857 netif_carrier_on(team->dev);
2858 else
2859 netif_carrier_off(team->dev);
2860}
2861
2862static void __team_port_change_check(struct team_port *port, bool linkup)
2863{
2864 if (port->state.linkup != linkup)
2865 __team_port_change_send(port, linkup);
2866 __team_carrier_check(port->team);
2867}
2868
2869static void __team_port_change_port_added(struct team_port *port, bool linkup)
2870{
2871 __team_port_change_send(port, linkup);
2872 __team_carrier_check(port->team);
2873}
2874
2875static void __team_port_change_port_removed(struct team_port *port)
2876{
2877 port->removed = true;
2878 __team_port_change_send(port, false);
2879 __team_carrier_check(port->team);
2880}
2881
2882static void team_port_change_check(struct team_port *port, bool linkup)
2883{
2884 struct team *team = port->team;
2885
2886 mutex_lock(&team->lock);
2887 __team_port_change_check(port, linkup);
2888 mutex_unlock(&team->lock);
2889}
2890
2891
2892/************************************
2893 * Net device notifier event handler
2894 ************************************/
2895
2896static int team_device_event(struct notifier_block *unused,
2897 unsigned long event, void *ptr)
2898{
2899 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2900 struct team_port *port;
2901
2902 port = team_port_get_rtnl(dev);
2903 if (!port)
2904 return NOTIFY_DONE;
2905
2906 switch (event) {
2907 case NETDEV_UP:
2908 if (netif_carrier_ok(dev))
2909 team_port_change_check(port, true);
2910 break;
2911 case NETDEV_DOWN:
2912 team_port_change_check(port, false);
2913 break;
2914 case NETDEV_CHANGE:
2915 if (netif_running(port->dev))
2916 team_port_change_check(port,
2917 !!netif_carrier_ok(port->dev));
2918 break;
2919 case NETDEV_UNREGISTER:
2920 team_del_slave(port->team->dev, dev);
2921 break;
2922 case NETDEV_FEAT_CHANGE:
2923 team_compute_features(port->team);
2924 break;
2925 case NETDEV_PRECHANGEMTU:
2926 /* Forbid to change mtu of underlaying device */
2927 if (!port->team->port_mtu_change_allowed)
2928 return NOTIFY_BAD;
2929 break;
2930 case NETDEV_PRE_TYPE_CHANGE:
2931 /* Forbid to change type of underlaying device */
2932 return NOTIFY_BAD;
2933 case NETDEV_RESEND_IGMP:
2934 /* Propagate to master device */
2935 call_netdevice_notifiers(event, port->team->dev);
2936 break;
2937 }
2938 return NOTIFY_DONE;
2939}
2940
2941static struct notifier_block team_notifier_block __read_mostly = {
2942 .notifier_call = team_device_event,
2943};
2944
2945
2946/***********************
2947 * Module init and exit
2948 ***********************/
2949
2950static int __init team_module_init(void)
2951{
2952 int err;
2953
2954 register_netdevice_notifier(&team_notifier_block);
2955
2956 err = rtnl_link_register(&team_link_ops);
2957 if (err)
2958 goto err_rtnl_reg;
2959
2960 err = team_nl_init();
2961 if (err)
2962 goto err_nl_init;
2963
2964 return 0;
2965
2966err_nl_init:
2967 rtnl_link_unregister(&team_link_ops);
2968
2969err_rtnl_reg:
2970 unregister_netdevice_notifier(&team_notifier_block);
2971
2972 return err;
2973}
2974
2975static void __exit team_module_exit(void)
2976{
2977 team_nl_fini();
2978 rtnl_link_unregister(&team_link_ops);
2979 unregister_netdevice_notifier(&team_notifier_block);
2980}
2981
2982module_init(team_module_init);
2983module_exit(team_module_exit);
2984
2985MODULE_LICENSE("GPL v2");
2986MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
2987MODULE_DESCRIPTION("Ethernet team device driver");
2988MODULE_ALIAS_RTNL_LINK(DRV_NAME);