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Merge tag 'kvm-x86-generic-6.8' of https://github.com/kvm-x86/linux into HEAD
[thirdparty/kernel/stable.git] / drivers / net / team / team.c
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
38 static 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 */
49 static 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
59 static 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
64 static 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
70 int team_modeop_port_enter(struct team *team, struct team_port *port)
71 {
72 return team_port_set_team_dev_addr(team, port);
73 }
74 EXPORT_SYMBOL(team_modeop_port_enter);
75
76 void 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 }
81 EXPORT_SYMBOL(team_modeop_port_change_dev_addr);
82
83 static 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
92 static 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
108 struct 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
117 static 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
129 static void __team_option_inst_del(struct team_option_inst *opt_inst)
130 {
131 list_del(&opt_inst->list);
132 kfree(opt_inst);
133 }
134
135 static 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
146 static 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
174 static 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
186 inst_del_option:
187 __team_option_inst_del_option(team, option);
188 return err;
189 }
190
191 static 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
204 static 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
216 static 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
231 inst_del_port:
232 __team_option_inst_del_port(team, port);
233 return err;
234 }
235
236 static 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
249 static 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
283 inst_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;
290 alloc_rollback:
291 for (i--; i >= 0; i--)
292 kfree(dst_opts[i]);
293
294 kfree(dst_opts);
295 return err;
296 }
297
298 static 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
313 static 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
331 static void __team_options_change_check(struct team *team);
332
333 int 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 }
345 EXPORT_SYMBOL(team_options_register);
346
347 void 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 }
355 EXPORT_SYMBOL(team_options_unregister);
356
357 static 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
368 static 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
377 void 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 }
384 EXPORT_SYMBOL(team_option_inst_set_change);
385
386 void team_options_change_check(struct team *team)
387 {
388 __team_options_change_check(team);
389 }
390 EXPORT_SYMBOL(team_options_change_check);
391
392
393 /****************
394 * Mode handling
395 ****************/
396
397 static LIST_HEAD(mode_list);
398 static DEFINE_SPINLOCK(mode_list_lock);
399
400 struct team_mode_item {
401 struct list_head list;
402 const struct team_mode *mode;
403 };
404
405 static 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
416 static 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
426 int 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);
447 unlock:
448 spin_unlock(&mode_list_lock);
449 return err;
450 }
451 EXPORT_SYMBOL(team_mode_register);
452
453 void 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 }
465 EXPORT_SYMBOL(team_mode_unregister);
466
467 static 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
494 static void team_mode_put(const struct team_mode *mode)
495 {
496 module_put(mode->owner);
497 }
498
499 static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
500 {
501 dev_kfree_skb_any(skb);
502 return false;
503 }
504
505 static 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
512 static const struct team_mode __team_no_mode = {
513 .kind = "*NOMODE*",
514 };
515
516 static bool team_is_mode_set(struct team *team)
517 {
518 return team->mode != &__team_no_mode;
519 }
520
521 static void team_set_no_mode(struct team *team)
522 {
523 team->user_carrier_enabled = false;
524 team->mode = &__team_no_mode;
525 }
526
527 static 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 */
552 static 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
590 static 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
628 static 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
651 static 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
659 static void team_notify_peers_init(struct team *team)
660 {
661 INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work);
662 }
663
664 static 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
674 static 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
697 static 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
705 static void team_mcast_rejoin_init(struct team *team)
706 {
707 INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work);
708 }
709
710 static 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 */
721 static 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
773 static 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
791 static void team_queue_override_fini(struct team *team)
792 {
793 kfree(team->qom_lists);
794 }
795
796 static 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 */
804 static 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
819 static 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
827 static 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
839 static 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
858 static 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
876 static 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
886 static 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
900 static 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
907 static 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
919 static 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 */
936 static 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
953 static 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
967 static 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
990 static 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
1028 static void team_compute_features(struct team *team)
1029 {
1030 __team_compute_features(team);
1031 netdev_change_features(team->dev);
1032 }
1033
1034 static 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
1050 err_port_enter:
1051 dev_put(team->dev);
1052
1053 return err;
1054 }
1055
1056 static 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
1064 static 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
1082 static 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
1090 static 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
1101 static int team_port_enable_netpoll(struct team_port *port)
1102 {
1103 return 0;
1104 }
1105 static void team_port_disable_netpoll(struct team_port *port)
1106 {
1107 }
1108 #endif
1109
1110 static 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
1126 static 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
1132 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1133 static int team_dev_type_check_change(struct net_device *dev,
1134 struct net_device *port_dev);
1135
1136 static 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
1296 err_set_slave_promisc:
1297 __team_option_inst_del_port(team, port);
1298
1299 err_option_port_add:
1300 team_upper_dev_unlink(team, port);
1301
1302 err_set_upper_link:
1303 netdev_rx_handler_unregister(port_dev);
1304
1305 err_handler_register:
1306 team_port_disable_netpoll(port);
1307
1308 err_enable_netpoll:
1309 vlan_vids_del_by_dev(port_dev, dev);
1310
1311 err_vids_add:
1312 dev_close(port_dev);
1313
1314 err_dev_open:
1315 team_port_leave(team, port);
1316 team_port_set_orig_dev_addr(port);
1317
1318 err_port_enter:
1319 dev_set_mtu(port_dev, port->orig.mtu);
1320
1321 err_set_mtu:
1322 kfree(port);
1323
1324 return err;
1325 }
1326
1327 static void __team_port_change_port_removed(struct team_port *port);
1328
1329 static 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
1380 static void team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1381 {
1382 ctx->data.str_val = team->mode->kind;
1383 }
1384
1385 static 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
1390 static 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
1396 static 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
1403 static 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
1409 static 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
1416 static 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
1422 static 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
1429 static 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
1435 static 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
1442 static 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
1450 static 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
1462 static 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
1470 static void __team_carrier_check(struct team *team);
1471
1472 static 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
1483 static 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
1491 static 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
1502 static 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
1510 static 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
1523 static 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
1531 static 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
1545 static 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
1614 static 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
1654 err_options_register:
1655 team_mcast_rejoin_fini(team);
1656 team_notify_peers_fini(team);
1657 team_queue_override_fini(team);
1658 err_team_queue_override_init:
1659 free_percpu(team->pcpu_stats);
1660
1661 return err;
1662 }
1663
1664 static 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
1684 static void team_destructor(struct net_device *dev)
1685 {
1686 struct team *team = netdev_priv(dev);
1687
1688 free_percpu(team->pcpu_stats);
1689 }
1690
1691 static int team_open(struct net_device *dev)
1692 {
1693 return 0;
1694 }
1695
1696 static 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 */
1712 static 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
1736 static 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
1760 static 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
1780 static 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
1793 static 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
1810 static 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
1837 unwind:
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
1846 static void
1847 team_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
1885 static 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
1905 unwind:
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
1913 static 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
1927 static void team_poll_controller(struct net_device *dev)
1928 {
1929 }
1930
1931 static 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
1939 static 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
1948 static 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
1968 static 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
1984 static 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
2006 static 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
2030 static 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
2043 static 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
2073 static 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
2080 static 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
2107 static 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
2117 static 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
2144 static 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
2170 static 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
2210 static 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
2220 static 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
2232 static unsigned int team_get_num_tx_queues(void)
2233 {
2234 return TEAM_DEFAULT_NUM_TX_QUEUES;
2235 }
2236
2237 static unsigned int team_get_num_rx_queues(void)
2238 {
2239 return TEAM_DEFAULT_NUM_RX_QUEUES;
2240 }
2241
2242 static 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
2257 static struct genl_family team_nl_family;
2258
2259 static 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
2266 static const struct nla_policy
2267 team_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
2280 static 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
2301 err_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 */
2311 static 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
2333 static void team_nl_team_put(struct team *team)
2334 {
2335 mutex_unlock(&team->lock);
2336 dev_put(team->dev);
2337 }
2338
2339 typedef int team_nl_send_func_t(struct sk_buff *skb,
2340 struct team *team, u32 portid);
2341
2342 static 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
2347 static 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
2423 nest_cancel:
2424 nla_nest_cancel(skb, option_item);
2425 return -EMSGSIZE;
2426 }
2427
2428 static 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
2445 static 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
2461 start_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
2500 send_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
2511 nla_put_failure:
2512 err = -EMSGSIZE;
2513 errout:
2514 nlmsg_free(skb);
2515 return err;
2516 }
2517
2518 static 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
2540 static int team_nl_send_event_options_get(struct team *team,
2541 struct list_head *sel_opt_inst_list);
2542
2543 static 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
2687 team_put:
2688 team_nl_team_put(team);
2689 rtnl_unlock:
2690 rtnl_unlock();
2691 return err;
2692 }
2693
2694 static 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
2719 nest_cancel:
2720 nla_nest_cancel(skb, port_item);
2721 return -EMSGSIZE;
2722 }
2723
2724 static 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
2740 start_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
2789 send_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
2800 nla_put_failure:
2801 err = -EMSGSIZE;
2802 errout:
2803 nlmsg_free(skb);
2804 return err;
2805 }
2806
2807 static 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
2825 static 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
2851 static const struct genl_multicast_group team_nl_mcgrps[] = {
2852 { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2853 };
2854
2855 static 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
2869 static 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
2876 static 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
2883 static 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
2890 static int __init team_nl_init(void)
2891 {
2892 return genl_register_family(&team_nl_family);
2893 }
2894
2895 static void __exit team_nl_fini(void)
2896 {
2897 genl_unregister_family(&team_nl_family);
2898 }
2899
2900
2901 /******************
2902 * Change checkers
2903 ******************/
2904
2905 static 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
2923 static 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
2943 send_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
2951 static 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
2973 static 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
2980 static 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
2986 static 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
2993 static 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
3007 static 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
3056 static 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
3065 static 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
3081 err_nl_init:
3082 rtnl_link_unregister(&team_link_ops);
3083
3084 err_rtnl_reg:
3085 unregister_netdevice_notifier(&team_notifier_block);
3086
3087 return err;
3088 }
3089
3090 static 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
3097 module_init(team_module_init);
3098 module_exit(team_module_exit);
3099
3100 MODULE_LICENSE("GPL v2");
3101 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
3102 MODULE_DESCRIPTION("Ethernet team device driver");
3103 MODULE_ALIAS_RTNL_LINK(DRV_NAME);
Mirror https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git