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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / net / team / team.c
blobca70a1d840eb38522a20a47b4404a325e7aeb956
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * drivers/net/team/team.c - Network team device driver
4 * Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com>
5 */
6
7 #include <linux/kernel.h>
8 #include <linux/types.h>
9 #include <linux/module.h>
10 #include <linux/init.h>
11 #include <linux/slab.h>
12 #include <linux/rcupdate.h>
13 #include <linux/errno.h>
14 #include <linux/ctype.h>
15 #include <linux/notifier.h>
16 #include <linux/netdevice.h>
17 #include <linux/netpoll.h>
18 #include <linux/if_vlan.h>
19 #include <linux/if_arp.h>
20 #include <linux/socket.h>
21 #include <linux/etherdevice.h>
22 #include <linux/rtnetlink.h>
23 #include <net/rtnetlink.h>
24 #include <net/genetlink.h>
25 #include <net/netlink.h>
26 #include <net/sch_generic.h>
27 #include <generated/utsrelease.h>
28 #include <linux/if_team.h>
29
30 #define DRV_NAME "team"
31
32
33 /**********
34 * Helpers
35 **********/
36
37 static struct team_port *team_port_get_rtnl(const struct net_device *dev)
38 {
39 struct team_port *port = rtnl_dereference(dev->rx_handler_data);
40
41 return netif_is_team_port(dev) ? port : NULL;
42 }
43
44 /*
45 * Since the ability to change device address for open port device is tested in
46 * team_port_add, this function can be called without control of return value
47 */
48 static int __set_port_dev_addr(struct net_device *port_dev,
49 const unsigned char *dev_addr)
50 {
51 struct sockaddr_storage addr;
52
53 memcpy(addr.__data, dev_addr, port_dev->addr_len);
54 addr.ss_family = port_dev->type;
55 return dev_set_mac_address(port_dev, (struct sockaddr *)&addr, NULL);
56 }
57
58 static int team_port_set_orig_dev_addr(struct team_port *port)
59 {
60 return __set_port_dev_addr(port->dev, port->orig.dev_addr);
61 }
62
63 static int team_port_set_team_dev_addr(struct team *team,
64 struct team_port *port)
65 {
66 return __set_port_dev_addr(port->dev, team->dev->dev_addr);
67 }
68
69 int team_modeop_port_enter(struct team *team, struct team_port *port)
70 {
71 return team_port_set_team_dev_addr(team, port);
72 }
73 EXPORT_SYMBOL(team_modeop_port_enter);
74
75 void team_modeop_port_change_dev_addr(struct team *team,
76 struct team_port *port)
77 {
78 team_port_set_team_dev_addr(team, port);
79 }
80 EXPORT_SYMBOL(team_modeop_port_change_dev_addr);
81
82 static void team_lower_state_changed(struct team_port *port)
83 {
84 struct netdev_lag_lower_state_info info;
85
86 info.link_up = port->linkup;
87 info.tx_enabled = team_port_enabled(port);
88 netdev_lower_state_changed(port->dev, &info);
89 }
90
91 static void team_refresh_port_linkup(struct team_port *port)
92 {
93 bool new_linkup = port->user.linkup_enabled ? port->user.linkup :
94 port->state.linkup;
95
96 if (port->linkup != new_linkup) {
97 port->linkup = new_linkup;
98 team_lower_state_changed(port);
99 }
100 }
101
102
103 /*******************
104 * Options handling
105 *******************/
106
107 struct team_option_inst { /* One for each option instance */
108 struct list_head list;
109 struct list_head tmp_list;
110 struct team_option *option;
111 struct team_option_inst_info info;
112 bool changed;
113 bool removed;
114 };
115
116 static struct team_option *__team_find_option(struct team *team,
117 const char *opt_name)
118 {
119 struct team_option *option;
120
121 list_for_each_entry(option, &team->option_list, list) {
122 if (strcmp(option->name, opt_name) == 0)
123 return option;
124 }
125 return NULL;
126 }
127
128 static void __team_option_inst_del(struct team_option_inst *opt_inst)
129 {
130 list_del(&opt_inst->list);
131 kfree(opt_inst);
132 }
133
134 static void __team_option_inst_del_option(struct team *team,
135 struct team_option *option)
136 {
137 struct team_option_inst *opt_inst, *tmp;
138
139 list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
140 if (opt_inst->option == option)
141 __team_option_inst_del(opt_inst);
142 }
143 }
144
145 static int __team_option_inst_add(struct team *team, struct team_option *option,
146 struct team_port *port)
147 {
148 struct team_option_inst *opt_inst;
149 unsigned int array_size;
150 unsigned int i;
151 int err;
152
153 array_size = option->array_size;
154 if (!array_size)
155 array_size = 1; /* No array but still need one instance */
156
157 for (i = 0; i < array_size; i++) {
158 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL);
159 if (!opt_inst)
160 return -ENOMEM;
161 opt_inst->option = option;
162 opt_inst->info.port = port;
163 opt_inst->info.array_index = i;
164 opt_inst->changed = true;
165 opt_inst->removed = false;
166 list_add_tail(&opt_inst->list, &team->option_inst_list);
167 if (option->init) {
168 err = option->init(team, &opt_inst->info);
169 if (err)
170 return err;
171 }
172
173 }
174 return 0;
175 }
176
177 static int __team_option_inst_add_option(struct team *team,
178 struct team_option *option)
179 {
180 int err;
181
182 if (!option->per_port) {
183 err = __team_option_inst_add(team, option, NULL);
184 if (err)
185 goto inst_del_option;
186 }
187 return 0;
188
189 inst_del_option:
190 __team_option_inst_del_option(team, option);
191 return err;
192 }
193
194 static void __team_option_inst_mark_removed_option(struct team *team,
195 struct team_option *option)
196 {
197 struct team_option_inst *opt_inst;
198
199 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
200 if (opt_inst->option == option) {
201 opt_inst->changed = true;
202 opt_inst->removed = true;
203 }
204 }
205 }
206
207 static void __team_option_inst_del_port(struct team *team,
208 struct team_port *port)
209 {
210 struct team_option_inst *opt_inst, *tmp;
211
212 list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
213 if (opt_inst->option->per_port &&
214 opt_inst->info.port == port)
215 __team_option_inst_del(opt_inst);
216 }
217 }
218
219 static int __team_option_inst_add_port(struct team *team,
220 struct team_port *port)
221 {
222 struct team_option *option;
223 int err;
224
225 list_for_each_entry(option, &team->option_list, list) {
226 if (!option->per_port)
227 continue;
228 err = __team_option_inst_add(team, option, port);
229 if (err)
230 goto inst_del_port;
231 }
232 return 0;
233
234 inst_del_port:
235 __team_option_inst_del_port(team, port);
236 return err;
237 }
238
239 static void __team_option_inst_mark_removed_port(struct team *team,
240 struct team_port *port)
241 {
242 struct team_option_inst *opt_inst;
243
244 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
245 if (opt_inst->info.port == port) {
246 opt_inst->changed = true;
247 opt_inst->removed = true;
248 }
249 }
250 }
251
252 static int __team_options_register(struct team *team,
253 const struct team_option *option,
254 size_t option_count)
255 {
256 int i;
257 struct team_option **dst_opts;
258 int err;
259
260 dst_opts = kcalloc(option_count, sizeof(struct team_option *),
261 GFP_KERNEL);
262 if (!dst_opts)
263 return -ENOMEM;
264 for (i = 0; i < option_count; i++, option++) {
265 if (__team_find_option(team, option->name)) {
266 err = -EEXIST;
267 goto alloc_rollback;
268 }
269 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
270 if (!dst_opts[i]) {
271 err = -ENOMEM;
272 goto alloc_rollback;
273 }
274 }
275
276 for (i = 0; i < option_count; i++) {
277 err = __team_option_inst_add_option(team, dst_opts[i]);
278 if (err)
279 goto inst_rollback;
280 list_add_tail(&dst_opts[i]->list, &team->option_list);
281 }
282
283 kfree(dst_opts);
284 return 0;
285
286 inst_rollback:
287 for (i--; i >= 0; i--)
288 __team_option_inst_del_option(team, dst_opts[i]);
289
290 i = option_count - 1;
291 alloc_rollback:
292 for (i--; i >= 0; i--)
293 kfree(dst_opts[i]);
294
295 kfree(dst_opts);
296 return err;
297 }
298
299 static void __team_options_mark_removed(struct team *team,
300 const struct team_option *option,
301 size_t option_count)
302 {
303 int i;
304
305 for (i = 0; i < option_count; i++, option++) {
306 struct team_option *del_opt;
307
308 del_opt = __team_find_option(team, option->name);
309 if (del_opt)
310 __team_option_inst_mark_removed_option(team, del_opt);
311 }
312 }
313
314 static void __team_options_unregister(struct team *team,
315 const struct team_option *option,
316 size_t option_count)
317 {
318 int i;
319
320 for (i = 0; i < option_count; i++, option++) {
321 struct team_option *del_opt;
322
323 del_opt = __team_find_option(team, option->name);
324 if (del_opt) {
325 __team_option_inst_del_option(team, del_opt);
326 list_del(&del_opt->list);
327 kfree(del_opt);
328 }
329 }
330 }
331
332 static void __team_options_change_check(struct team *team);
333
334 int team_options_register(struct team *team,
335 const struct team_option *option,
336 size_t option_count)
337 {
338 int err;
339
340 err = __team_options_register(team, option, option_count);
341 if (err)
342 return err;
343 __team_options_change_check(team);
344 return 0;
345 }
346 EXPORT_SYMBOL(team_options_register);
347
348 void team_options_unregister(struct team *team,
349 const struct team_option *option,
350 size_t option_count)
351 {
352 __team_options_mark_removed(team, option, option_count);
353 __team_options_change_check(team);
354 __team_options_unregister(team, option, option_count);
355 }
356 EXPORT_SYMBOL(team_options_unregister);
357
358 static int team_option_get(struct team *team,
359 struct team_option_inst *opt_inst,
360 struct team_gsetter_ctx *ctx)
361 {
362 if (!opt_inst->option->getter)
363 return -EOPNOTSUPP;
364 return opt_inst->option->getter(team, ctx);
365 }
366
367 static int team_option_set(struct team *team,
368 struct team_option_inst *opt_inst,
369 struct team_gsetter_ctx *ctx)
370 {
371 if (!opt_inst->option->setter)
372 return -EOPNOTSUPP;
373 return opt_inst->option->setter(team, ctx);
374 }
375
376 void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info)
377 {
378 struct team_option_inst *opt_inst;
379
380 opt_inst = container_of(opt_inst_info, struct team_option_inst, info);
381 opt_inst->changed = true;
382 }
383 EXPORT_SYMBOL(team_option_inst_set_change);
384
385 void team_options_change_check(struct team *team)
386 {
387 __team_options_change_check(team);
388 }
389 EXPORT_SYMBOL(team_options_change_check);
390
391
392 /****************
393 * Mode handling
394 ****************/
395
396 static LIST_HEAD(mode_list);
397 static DEFINE_SPINLOCK(mode_list_lock);
398
399 struct team_mode_item {
400 struct list_head list;
401 const struct team_mode *mode;
402 };
403
404 static struct team_mode_item *__find_mode(const char *kind)
405 {
406 struct team_mode_item *mitem;
407
408 list_for_each_entry(mitem, &mode_list, list) {
409 if (strcmp(mitem->mode->kind, kind) == 0)
410 return mitem;
411 }
412 return NULL;
413 }
414
415 static bool is_good_mode_name(const char *name)
416 {
417 while (*name != '\0') {
418 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
419 return false;
420 name++;
421 }
422 return true;
423 }
424
425 int team_mode_register(const struct team_mode *mode)
426 {
427 int err = 0;
428 struct team_mode_item *mitem;
429
430 if (!is_good_mode_name(mode->kind) ||
431 mode->priv_size > TEAM_MODE_PRIV_SIZE)
432 return -EINVAL;
433
434 mitem = kmalloc(sizeof(*mitem), GFP_KERNEL);
435 if (!mitem)
436 return -ENOMEM;
437
438 spin_lock(&mode_list_lock);
439 if (__find_mode(mode->kind)) {
440 err = -EEXIST;
441 kfree(mitem);
442 goto unlock;
443 }
444 mitem->mode = mode;
445 list_add_tail(&mitem->list, &mode_list);
446 unlock:
447 spin_unlock(&mode_list_lock);
448 return err;
449 }
450 EXPORT_SYMBOL(team_mode_register);
451
452 void team_mode_unregister(const struct team_mode *mode)
453 {
454 struct team_mode_item *mitem;
455
456 spin_lock(&mode_list_lock);
457 mitem = __find_mode(mode->kind);
458 if (mitem) {
459 list_del_init(&mitem->list);
460 kfree(mitem);
461 }
462 spin_unlock(&mode_list_lock);
463 }
464 EXPORT_SYMBOL(team_mode_unregister);
465
466 static const struct team_mode *team_mode_get(const char *kind)
467 {
468 struct team_mode_item *mitem;
469 const struct team_mode *mode = NULL;
470
471 spin_lock(&mode_list_lock);
472 mitem = __find_mode(kind);
473 if (!mitem) {
474 spin_unlock(&mode_list_lock);
475 request_module("team-mode-%s", kind);
476 spin_lock(&mode_list_lock);
477 mitem = __find_mode(kind);
478 }
479 if (mitem) {
480 mode = mitem->mode;
481 if (!try_module_get(mode->owner))
482 mode = NULL;
483 }
484
485 spin_unlock(&mode_list_lock);
486 return mode;
487 }
488
489 static void team_mode_put(const struct team_mode *mode)
490 {
491 module_put(mode->owner);
492 }
493
494 static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
495 {
496 dev_kfree_skb_any(skb);
497 return false;
498 }
499
500 static rx_handler_result_t team_dummy_receive(struct team *team,
501 struct team_port *port,
502 struct sk_buff *skb)
503 {
504 return RX_HANDLER_ANOTHER;
505 }
506
507 static const struct team_mode __team_no_mode = {
508 .kind = "*NOMODE*",
509 };
510
511 static bool team_is_mode_set(struct team *team)
512 {
513 return team->mode != &__team_no_mode;
514 }
515
516 static void team_set_no_mode(struct team *team)
517 {
518 team->user_carrier_enabled = false;
519 team->mode = &__team_no_mode;
520 }
521
522 static void team_adjust_ops(struct team *team)
523 {
524 /*
525 * To avoid checks in rx/tx skb paths, ensure here that non-null and
526 * correct ops are always set.
527 */
528
529 if (!team->en_port_count || !team_is_mode_set(team) ||
530 !team->mode->ops->transmit)
531 team->ops.transmit = team_dummy_transmit;
532 else
533 team->ops.transmit = team->mode->ops->transmit;
534
535 if (!team->en_port_count || !team_is_mode_set(team) ||
536 !team->mode->ops->receive)
537 team->ops.receive = team_dummy_receive;
538 else
539 team->ops.receive = team->mode->ops->receive;
540 }
541
542 /*
543 * We can benefit from the fact that it's ensured no port is present
544 * at the time of mode change. Therefore no packets are in fly so there's no
545 * need to set mode operations in any special way.
546 */
547 static int __team_change_mode(struct team *team,
548 const struct team_mode *new_mode)
549 {
550 /* Check if mode was previously set and do cleanup if so */
551 if (team_is_mode_set(team)) {
552 void (*exit_op)(struct team *team) = team->ops.exit;
553
554 /* Clear ops area so no callback is called any longer */
555 memset(&team->ops, 0, sizeof(struct team_mode_ops));
556 team_adjust_ops(team);
557
558 if (exit_op)
559 exit_op(team);
560 team_mode_put(team->mode);
561 team_set_no_mode(team);
562 /* zero private data area */
563 memset(&team->mode_priv, 0,
564 sizeof(struct team) - offsetof(struct team, mode_priv));
565 }
566
567 if (!new_mode)
568 return 0;
569
570 if (new_mode->ops->init) {
571 int err;
572
573 err = new_mode->ops->init(team);
574 if (err)
575 return err;
576 }
577
578 team->mode = new_mode;
579 memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
580 team_adjust_ops(team);
581
582 return 0;
583 }
584
585 static int team_change_mode(struct team *team, const char *kind)
586 {
587 const struct team_mode *new_mode;
588 struct net_device *dev = team->dev;
589 int err;
590
591 if (!list_empty(&team->port_list)) {
592 netdev_err(dev, "No ports can be present during mode change\n");
593 return -EBUSY;
594 }
595
596 if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) {
597 netdev_err(dev, "Unable to change to the same mode the team is in\n");
598 return -EINVAL;
599 }
600
601 new_mode = team_mode_get(kind);
602 if (!new_mode) {
603 netdev_err(dev, "Mode \"%s\" not found\n", kind);
604 return -EINVAL;
605 }
606
607 err = __team_change_mode(team, new_mode);
608 if (err) {
609 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
610 team_mode_put(new_mode);
611 return err;
612 }
613
614 netdev_info(dev, "Mode changed to \"%s\"\n", kind);
615 return 0;
616 }
617
618
619 /*********************
620 * Peers notification
621 *********************/
622
623 static void team_notify_peers_work(struct work_struct *work)
624 {
625 struct team *team;
626 int val;
627
628 team = container_of(work, struct team, notify_peers.dw.work);
629
630 if (!rtnl_trylock()) {
631 schedule_delayed_work(&team->notify_peers.dw, 0);
632 return;
633 }
634 val = atomic_dec_if_positive(&team->notify_peers.count_pending);
635 if (val < 0) {
636 rtnl_unlock();
637 return;
638 }
639 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, team->dev);
640 rtnl_unlock();
641 if (val)
642 schedule_delayed_work(&team->notify_peers.dw,
643 msecs_to_jiffies(team->notify_peers.interval));
644 }
645
646 static void team_notify_peers(struct team *team)
647 {
648 if (!team->notify_peers.count || !netif_running(team->dev))
649 return;
650 atomic_add(team->notify_peers.count, &team->notify_peers.count_pending);
651 schedule_delayed_work(&team->notify_peers.dw, 0);
652 }
653
654 static void team_notify_peers_init(struct team *team)
655 {
656 INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work);
657 }
658
659 static void team_notify_peers_fini(struct team *team)
660 {
661 cancel_delayed_work_sync(&team->notify_peers.dw);
662 }
663
664
665 /*******************************
666 * Send multicast group rejoins
667 *******************************/
668
669 static void team_mcast_rejoin_work(struct work_struct *work)
670 {
671 struct team *team;
672 int val;
673
674 team = container_of(work, struct team, mcast_rejoin.dw.work);
675
676 if (!rtnl_trylock()) {
677 schedule_delayed_work(&team->mcast_rejoin.dw, 0);
678 return;
679 }
680 val = atomic_dec_if_positive(&team->mcast_rejoin.count_pending);
681 if (val < 0) {
682 rtnl_unlock();
683 return;
684 }
685 call_netdevice_notifiers(NETDEV_RESEND_IGMP, team->dev);
686 rtnl_unlock();
687 if (val)
688 schedule_delayed_work(&team->mcast_rejoin.dw,
689 msecs_to_jiffies(team->mcast_rejoin.interval));
690 }
691
692 static void team_mcast_rejoin(struct team *team)
693 {
694 if (!team->mcast_rejoin.count || !netif_running(team->dev))
695 return;
696 atomic_add(team->mcast_rejoin.count, &team->mcast_rejoin.count_pending);
697 schedule_delayed_work(&team->mcast_rejoin.dw, 0);
698 }
699
700 static void team_mcast_rejoin_init(struct team *team)
701 {
702 INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work);
703 }
704
705 static void team_mcast_rejoin_fini(struct team *team)
706 {
707 cancel_delayed_work_sync(&team->mcast_rejoin.dw);
708 }
709
710
711 /************************
712 * Rx path frame handler
713 ************************/
714
715 /* note: already called with rcu_read_lock */
716 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
717 {
718 struct sk_buff *skb = *pskb;
719 struct team_port *port;
720 struct team *team;
721 rx_handler_result_t res;
722
723 skb = skb_share_check(skb, GFP_ATOMIC);
724 if (!skb)
725 return RX_HANDLER_CONSUMED;
726
727 *pskb = skb;
728
729 port = team_port_get_rcu(skb->dev);
730 team = port->team;
731 if (!team_port_enabled(port)) {
732 /* allow exact match delivery for disabled ports */
733 res = RX_HANDLER_EXACT;
734 } else {
735 res = team->ops.receive(team, port, skb);
736 }
737 if (res == RX_HANDLER_ANOTHER) {
738 struct team_pcpu_stats *pcpu_stats;
739
740 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
741 u64_stats_update_begin(&pcpu_stats->syncp);
742 pcpu_stats->rx_packets++;
743 pcpu_stats->rx_bytes += skb->len;
744 if (skb->pkt_type == PACKET_MULTICAST)
745 pcpu_stats->rx_multicast++;
746 u64_stats_update_end(&pcpu_stats->syncp);
747
748 skb->dev = team->dev;
749 } else if (res == RX_HANDLER_EXACT) {
750 this_cpu_inc(team->pcpu_stats->rx_nohandler);
751 } else {
752 this_cpu_inc(team->pcpu_stats->rx_dropped);
753 }
754
755 return res;
756 }
757
758
759 /*************************************
760 * Multiqueue Tx port select override
761 *************************************/
762
763 static int team_queue_override_init(struct team *team)
764 {
765 struct list_head *listarr;
766 unsigned int queue_cnt = team->dev->num_tx_queues - 1;
767 unsigned int i;
768
769 if (!queue_cnt)
770 return 0;
771 listarr = kmalloc_array(queue_cnt, sizeof(struct list_head),
772 GFP_KERNEL);
773 if (!listarr)
774 return -ENOMEM;
775 team->qom_lists = listarr;
776 for (i = 0; i < queue_cnt; i++)
777 INIT_LIST_HEAD(listarr++);
778 return 0;
779 }
780
781 static void team_queue_override_fini(struct team *team)
782 {
783 kfree(team->qom_lists);
784 }
785
786 static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
787 {
788 return &team->qom_lists[queue_id - 1];
789 }
790
791 /*
792 * note: already called with rcu_read_lock
793 */
794 static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
795 {
796 struct list_head *qom_list;
797 struct team_port *port;
798
799 if (!team->queue_override_enabled || !skb->queue_mapping)
800 return false;
801 qom_list = __team_get_qom_list(team, skb->queue_mapping);
802 list_for_each_entry_rcu(port, qom_list, qom_list) {
803 if (!team_dev_queue_xmit(team, port, skb))
804 return true;
805 }
806 return false;
807 }
808
809 static void __team_queue_override_port_del(struct team *team,
810 struct team_port *port)
811 {
812 if (!port->queue_id)
813 return;
814 list_del_rcu(&port->qom_list);
815 }
816
817 static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
818 struct team_port *cur)
819 {
820 if (port->priority < cur->priority)
821 return true;
822 if (port->priority > cur->priority)
823 return false;
824 if (port->index < cur->index)
825 return true;
826 return false;
827 }
828
829 static void __team_queue_override_port_add(struct team *team,
830 struct team_port *port)
831 {
832 struct team_port *cur;
833 struct list_head *qom_list;
834 struct list_head *node;
835
836 if (!port->queue_id)
837 return;
838 qom_list = __team_get_qom_list(team, port->queue_id);
839 node = qom_list;
840 list_for_each_entry(cur, qom_list, qom_list) {
841 if (team_queue_override_port_has_gt_prio_than(port, cur))
842 break;
843 node = &cur->qom_list;
844 }
845 list_add_tail_rcu(&port->qom_list, node);
846 }
847
848 static void __team_queue_override_enabled_check(struct team *team)
849 {
850 struct team_port *port;
851 bool enabled = false;
852
853 list_for_each_entry(port, &team->port_list, list) {
854 if (port->queue_id) {
855 enabled = true;
856 break;
857 }
858 }
859 if (enabled == team->queue_override_enabled)
860 return;
861 netdev_dbg(team->dev, "%s queue override\n",
862 enabled ? "Enabling" : "Disabling");
863 team->queue_override_enabled = enabled;
864 }
865
866 static void team_queue_override_port_prio_changed(struct team *team,
867 struct team_port *port)
868 {
869 if (!port->queue_id || team_port_enabled(port))
870 return;
871 __team_queue_override_port_del(team, port);
872 __team_queue_override_port_add(team, port);
873 __team_queue_override_enabled_check(team);
874 }
875
876 static void team_queue_override_port_change_queue_id(struct team *team,
877 struct team_port *port,
878 u16 new_queue_id)
879 {
880 if (team_port_enabled(port)) {
881 __team_queue_override_port_del(team, port);
882 port->queue_id = new_queue_id;
883 __team_queue_override_port_add(team, port);
884 __team_queue_override_enabled_check(team);
885 } else {
886 port->queue_id = new_queue_id;
887 }
888 }
889
890 static void team_queue_override_port_add(struct team *team,
891 struct team_port *port)
892 {
893 __team_queue_override_port_add(team, port);
894 __team_queue_override_enabled_check(team);
895 }
896
897 static void team_queue_override_port_del(struct team *team,
898 struct team_port *port)
899 {
900 __team_queue_override_port_del(team, port);
901 __team_queue_override_enabled_check(team);
902 }
903
904
905 /****************
906 * Port handling
907 ****************/
908
909 static bool team_port_find(const struct team *team,
910 const struct team_port *port)
911 {
912 struct team_port *cur;
913
914 list_for_each_entry(cur, &team->port_list, list)
915 if (cur == port)
916 return true;
917 return false;
918 }
919
920 /*
921 * Enable/disable port by adding to enabled port hashlist and setting
922 * port->index (Might be racy so reader could see incorrect ifindex when
923 * processing a flying packet, but that is not a problem). Write guarded
924 * by team->lock.
925 */
926 static void team_port_enable(struct team *team,
927 struct team_port *port)
928 {
929 if (team_port_enabled(port))
930 return;
931 port->index = team->en_port_count++;
932 hlist_add_head_rcu(&port->hlist,
933 team_port_index_hash(team, port->index));
934 team_adjust_ops(team);
935 team_queue_override_port_add(team, port);
936 if (team->ops.port_enabled)
937 team->ops.port_enabled(team, port);
938 team_notify_peers(team);
939 team_mcast_rejoin(team);
940 team_lower_state_changed(port);
941 }
942
943 static void __reconstruct_port_hlist(struct team *team, int rm_index)
944 {
945 int i;
946 struct team_port *port;
947
948 for (i = rm_index + 1; i < team->en_port_count; i++) {
949 port = team_get_port_by_index(team, i);
950 hlist_del_rcu(&port->hlist);
951 port->index--;
952 hlist_add_head_rcu(&port->hlist,
953 team_port_index_hash(team, port->index));
954 }
955 }
956
957 static void team_port_disable(struct team *team,
958 struct team_port *port)
959 {
960 if (!team_port_enabled(port))
961 return;
962 if (team->ops.port_disabled)
963 team->ops.port_disabled(team, port);
964 hlist_del_rcu(&port->hlist);
965 __reconstruct_port_hlist(team, port->index);
966 port->index = -1;
967 team->en_port_count--;
968 team_queue_override_port_del(team, port);
969 team_adjust_ops(team);
970 team_lower_state_changed(port);
971 }
972
973 #define TEAM_VLAN_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
974 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
975 NETIF_F_HIGHDMA | NETIF_F_LRO)
976
977 #define TEAM_ENC_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
978 NETIF_F_RXCSUM | NETIF_F_ALL_TSO)
979
980 static void __team_compute_features(struct team *team)
981 {
982 struct team_port *port;
983 netdev_features_t vlan_features = TEAM_VLAN_FEATURES &
984 NETIF_F_ALL_FOR_ALL;
985 netdev_features_t enc_features = TEAM_ENC_FEATURES;
986 unsigned short max_hard_header_len = ETH_HLEN;
987 unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE |
988 IFF_XMIT_DST_RELEASE_PERM;
989
990 list_for_each_entry(port, &team->port_list, list) {
991 vlan_features = netdev_increment_features(vlan_features,
992 port->dev->vlan_features,
993 TEAM_VLAN_FEATURES);
994 enc_features =
995 netdev_increment_features(enc_features,
996 port->dev->hw_enc_features,
997 TEAM_ENC_FEATURES);
998
999
1000 dst_release_flag &= port->dev->priv_flags;
1001 if (port->dev->hard_header_len > max_hard_header_len)
1002 max_hard_header_len = port->dev->hard_header_len;
1003 }
1004
1005 team->dev->vlan_features = vlan_features;
1006 team->dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL |
1007 NETIF_F_HW_VLAN_CTAG_TX |
1008 NETIF_F_HW_VLAN_STAG_TX |
1009 NETIF_F_GSO_UDP_L4;
1010 team->dev->hard_header_len = max_hard_header_len;
1011
1012 team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
1013 if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
1014 team->dev->priv_flags |= IFF_XMIT_DST_RELEASE;
1015 }
1016
1017 static void team_compute_features(struct team *team)
1018 {
1019 mutex_lock(&team->lock);
1020 __team_compute_features(team);
1021 mutex_unlock(&team->lock);
1022 netdev_change_features(team->dev);
1023 }
1024
1025 static int team_port_enter(struct team *team, struct team_port *port)
1026 {
1027 int err = 0;
1028
1029 dev_hold(team->dev);
1030 if (team->ops.port_enter) {
1031 err = team->ops.port_enter(team, port);
1032 if (err) {
1033 netdev_err(team->dev, "Device %s failed to enter team mode\n",
1034 port->dev->name);
1035 goto err_port_enter;
1036 }
1037 }
1038
1039 return 0;
1040
1041 err_port_enter:
1042 dev_put(team->dev);
1043
1044 return err;
1045 }
1046
1047 static void team_port_leave(struct team *team, struct team_port *port)
1048 {
1049 if (team->ops.port_leave)
1050 team->ops.port_leave(team, port);
1051 dev_put(team->dev);
1052 }
1053
1054 #ifdef CONFIG_NET_POLL_CONTROLLER
1055 static int __team_port_enable_netpoll(struct team_port *port)
1056 {
1057 struct netpoll *np;
1058 int err;
1059
1060 np = kzalloc(sizeof(*np), GFP_KERNEL);
1061 if (!np)
1062 return -ENOMEM;
1063
1064 err = __netpoll_setup(np, port->dev);
1065 if (err) {
1066 kfree(np);
1067 return err;
1068 }
1069 port->np = np;
1070 return err;
1071 }
1072
1073 static int team_port_enable_netpoll(struct team_port *port)
1074 {
1075 if (!port->team->dev->npinfo)
1076 return 0;
1077
1078 return __team_port_enable_netpoll(port);
1079 }
1080
1081 static void team_port_disable_netpoll(struct team_port *port)
1082 {
1083 struct netpoll *np = port->np;
1084
1085 if (!np)
1086 return;
1087 port->np = NULL;
1088
1089 __netpoll_free(np);
1090 }
1091 #else
1092 static int team_port_enable_netpoll(struct team_port *port)
1093 {
1094 return 0;
1095 }
1096 static void team_port_disable_netpoll(struct team_port *port)
1097 {
1098 }
1099 #endif
1100
1101 static int team_upper_dev_link(struct team *team, struct team_port *port,
1102 struct netlink_ext_ack *extack)
1103 {
1104 struct netdev_lag_upper_info lag_upper_info;
1105 int err;
1106
1107 lag_upper_info.tx_type = team->mode->lag_tx_type;
1108 lag_upper_info.hash_type = NETDEV_LAG_HASH_UNKNOWN;
1109 err = netdev_master_upper_dev_link(port->dev, team->dev, NULL,
1110 &lag_upper_info, extack);
1111 if (err)
1112 return err;
1113 port->dev->priv_flags |= IFF_TEAM_PORT;
1114 return 0;
1115 }
1116
1117 static void team_upper_dev_unlink(struct team *team, struct team_port *port)
1118 {
1119 netdev_upper_dev_unlink(port->dev, team->dev);
1120 port->dev->priv_flags &= ~IFF_TEAM_PORT;
1121 }
1122
1123 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1124 static int team_dev_type_check_change(struct net_device *dev,
1125 struct net_device *port_dev);
1126
1127 static int team_port_add(struct team *team, struct net_device *port_dev,
1128 struct netlink_ext_ack *extack)
1129 {
1130 struct net_device *dev = team->dev;
1131 struct team_port *port;
1132 char *portname = port_dev->name;
1133 int err;
1134
1135 if (port_dev->flags & IFF_LOOPBACK) {
1136 NL_SET_ERR_MSG(extack, "Loopback device can't be added as a team port");
1137 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1138 portname);
1139 return -EINVAL;
1140 }
1141
1142 if (netif_is_team_port(port_dev)) {
1143 NL_SET_ERR_MSG(extack, "Device is already a port of a team device");
1144 netdev_err(dev, "Device %s is already a port "
1145 "of a team device\n", portname);
1146 return -EBUSY;
1147 }
1148
1149 if (dev == port_dev) {
1150 NL_SET_ERR_MSG(extack, "Cannot enslave team device to itself");
1151 netdev_err(dev, "Cannot enslave team device to itself\n");
1152 return -EINVAL;
1153 }
1154
1155 if (netdev_has_upper_dev(dev, port_dev)) {
1156 NL_SET_ERR_MSG(extack, "Device is already an upper device of the team interface");
1157 netdev_err(dev, "Device %s is already an upper device of the team interface\n",
1158 portname);
1159 return -EBUSY;
1160 }
1161
1162 if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1163 vlan_uses_dev(dev)) {
1164 NL_SET_ERR_MSG(extack, "Device is VLAN challenged and team device has VLAN set up");
1165 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1166 portname);
1167 return -EPERM;
1168 }
1169
1170 err = team_dev_type_check_change(dev, port_dev);
1171 if (err)
1172 return err;
1173
1174 if (port_dev->flags & IFF_UP) {
1175 NL_SET_ERR_MSG(extack, "Device is up. Set it down before adding it as a team port");
1176 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1177 portname);
1178 return -EBUSY;
1179 }
1180
1181 port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1182 GFP_KERNEL);
1183 if (!port)
1184 return -ENOMEM;
1185
1186 port->dev = port_dev;
1187 port->team = team;
1188 INIT_LIST_HEAD(&port->qom_list);
1189
1190 port->orig.mtu = port_dev->mtu;
1191 err = dev_set_mtu(port_dev, dev->mtu);
1192 if (err) {
1193 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1194 goto err_set_mtu;
1195 }
1196
1197 memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1198
1199 err = team_port_enter(team, port);
1200 if (err) {
1201 netdev_err(dev, "Device %s failed to enter team mode\n",
1202 portname);
1203 goto err_port_enter;
1204 }
1205
1206 err = dev_open(port_dev, extack);
1207 if (err) {
1208 netdev_dbg(dev, "Device %s opening failed\n",
1209 portname);
1210 goto err_dev_open;
1211 }
1212
1213 err = vlan_vids_add_by_dev(port_dev, dev);
1214 if (err) {
1215 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1216 portname);
1217 goto err_vids_add;
1218 }
1219
1220 err = team_port_enable_netpoll(port);
1221 if (err) {
1222 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1223 portname);
1224 goto err_enable_netpoll;
1225 }
1226
1227 if (!(dev->features & NETIF_F_LRO))
1228 dev_disable_lro(port_dev);
1229
1230 err = netdev_rx_handler_register(port_dev, team_handle_frame,
1231 port);
1232 if (err) {
1233 netdev_err(dev, "Device %s failed to register rx_handler\n",
1234 portname);
1235 goto err_handler_register;
1236 }
1237
1238 err = team_upper_dev_link(team, port, extack);
1239 if (err) {
1240 netdev_err(dev, "Device %s failed to set upper link\n",
1241 portname);
1242 goto err_set_upper_link;
1243 }
1244
1245 err = __team_option_inst_add_port(team, port);
1246 if (err) {
1247 netdev_err(dev, "Device %s failed to add per-port options\n",
1248 portname);
1249 goto err_option_port_add;
1250 }
1251
1252 /* set promiscuity level to new slave */
1253 if (dev->flags & IFF_PROMISC) {
1254 err = dev_set_promiscuity(port_dev, 1);
1255 if (err)
1256 goto err_set_slave_promisc;
1257 }
1258
1259 /* set allmulti level to new slave */
1260 if (dev->flags & IFF_ALLMULTI) {
1261 err = dev_set_allmulti(port_dev, 1);
1262 if (err) {
1263 if (dev->flags & IFF_PROMISC)
1264 dev_set_promiscuity(port_dev, -1);
1265 goto err_set_slave_promisc;
1266 }
1267 }
1268
1269 netif_addr_lock_bh(dev);
1270 dev_uc_sync_multiple(port_dev, dev);
1271 dev_mc_sync_multiple(port_dev, dev);
1272 netif_addr_unlock_bh(dev);
1273
1274 port->index = -1;
1275 list_add_tail_rcu(&port->list, &team->port_list);
1276 team_port_enable(team, port);
1277 __team_compute_features(team);
1278 __team_port_change_port_added(port, !!netif_oper_up(port_dev));
1279 __team_options_change_check(team);
1280
1281 netdev_info(dev, "Port device %s added\n", portname);
1282
1283 return 0;
1284
1285 err_set_slave_promisc:
1286 __team_option_inst_del_port(team, port);
1287
1288 err_option_port_add:
1289 team_upper_dev_unlink(team, port);
1290
1291 err_set_upper_link:
1292 netdev_rx_handler_unregister(port_dev);
1293
1294 err_handler_register:
1295 team_port_disable_netpoll(port);
1296
1297 err_enable_netpoll:
1298 vlan_vids_del_by_dev(port_dev, dev);
1299
1300 err_vids_add:
1301 dev_close(port_dev);
1302
1303 err_dev_open:
1304 team_port_leave(team, port);
1305 team_port_set_orig_dev_addr(port);
1306
1307 err_port_enter:
1308 dev_set_mtu(port_dev, port->orig.mtu);
1309
1310 err_set_mtu:
1311 kfree(port);
1312
1313 return err;
1314 }
1315
1316 static void __team_port_change_port_removed(struct team_port *port);
1317
1318 static int team_port_del(struct team *team, struct net_device *port_dev)
1319 {
1320 struct net_device *dev = team->dev;
1321 struct team_port *port;
1322 char *portname = port_dev->name;
1323
1324 port = team_port_get_rtnl(port_dev);
1325 if (!port || !team_port_find(team, port)) {
1326 netdev_err(dev, "Device %s does not act as a port of this team\n",
1327 portname);
1328 return -ENOENT;
1329 }
1330
1331 team_port_disable(team, port);
1332 list_del_rcu(&port->list);
1333
1334 if (dev->flags & IFF_PROMISC)
1335 dev_set_promiscuity(port_dev, -1);
1336 if (dev->flags & IFF_ALLMULTI)
1337 dev_set_allmulti(port_dev, -1);
1338
1339 team_upper_dev_unlink(team, port);
1340 netdev_rx_handler_unregister(port_dev);
1341 team_port_disable_netpoll(port);
1342 vlan_vids_del_by_dev(port_dev, dev);
1343 dev_uc_unsync(port_dev, dev);
1344 dev_mc_unsync(port_dev, dev);
1345 dev_close(port_dev);
1346 team_port_leave(team, port);
1347
1348 __team_option_inst_mark_removed_port(team, port);
1349 __team_options_change_check(team);
1350 __team_option_inst_del_port(team, port);
1351 __team_port_change_port_removed(port);
1352
1353 team_port_set_orig_dev_addr(port);
1354 dev_set_mtu(port_dev, port->orig.mtu);
1355 kfree_rcu(port, rcu);
1356 netdev_info(dev, "Port device %s removed\n", portname);
1357 __team_compute_features(team);
1358
1359 return 0;
1360 }
1361
1362
1363 /*****************
1364 * Net device ops
1365 *****************/
1366
1367 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1368 {
1369 ctx->data.str_val = team->mode->kind;
1370 return 0;
1371 }
1372
1373 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1374 {
1375 return team_change_mode(team, ctx->data.str_val);
1376 }
1377
1378 static int team_notify_peers_count_get(struct team *team,
1379 struct team_gsetter_ctx *ctx)
1380 {
1381 ctx->data.u32_val = team->notify_peers.count;
1382 return 0;
1383 }
1384
1385 static int team_notify_peers_count_set(struct team *team,
1386 struct team_gsetter_ctx *ctx)
1387 {
1388 team->notify_peers.count = ctx->data.u32_val;
1389 return 0;
1390 }
1391
1392 static int team_notify_peers_interval_get(struct team *team,
1393 struct team_gsetter_ctx *ctx)
1394 {
1395 ctx->data.u32_val = team->notify_peers.interval;
1396 return 0;
1397 }
1398
1399 static int team_notify_peers_interval_set(struct team *team,
1400 struct team_gsetter_ctx *ctx)
1401 {
1402 team->notify_peers.interval = ctx->data.u32_val;
1403 return 0;
1404 }
1405
1406 static int team_mcast_rejoin_count_get(struct team *team,
1407 struct team_gsetter_ctx *ctx)
1408 {
1409 ctx->data.u32_val = team->mcast_rejoin.count;
1410 return 0;
1411 }
1412
1413 static int team_mcast_rejoin_count_set(struct team *team,
1414 struct team_gsetter_ctx *ctx)
1415 {
1416 team->mcast_rejoin.count = ctx->data.u32_val;
1417 return 0;
1418 }
1419
1420 static int team_mcast_rejoin_interval_get(struct team *team,
1421 struct team_gsetter_ctx *ctx)
1422 {
1423 ctx->data.u32_val = team->mcast_rejoin.interval;
1424 return 0;
1425 }
1426
1427 static int team_mcast_rejoin_interval_set(struct team *team,
1428 struct team_gsetter_ctx *ctx)
1429 {
1430 team->mcast_rejoin.interval = ctx->data.u32_val;
1431 return 0;
1432 }
1433
1434 static int team_port_en_option_get(struct team *team,
1435 struct team_gsetter_ctx *ctx)
1436 {
1437 struct team_port *port = ctx->info->port;
1438
1439 ctx->data.bool_val = team_port_enabled(port);
1440 return 0;
1441 }
1442
1443 static int team_port_en_option_set(struct team *team,
1444 struct team_gsetter_ctx *ctx)
1445 {
1446 struct team_port *port = ctx->info->port;
1447
1448 if (ctx->data.bool_val)
1449 team_port_enable(team, port);
1450 else
1451 team_port_disable(team, port);
1452 return 0;
1453 }
1454
1455 static int team_user_linkup_option_get(struct team *team,
1456 struct team_gsetter_ctx *ctx)
1457 {
1458 struct team_port *port = ctx->info->port;
1459
1460 ctx->data.bool_val = port->user.linkup;
1461 return 0;
1462 }
1463
1464 static void __team_carrier_check(struct team *team);
1465
1466 static int team_user_linkup_option_set(struct team *team,
1467 struct team_gsetter_ctx *ctx)
1468 {
1469 struct team_port *port = ctx->info->port;
1470
1471 port->user.linkup = ctx->data.bool_val;
1472 team_refresh_port_linkup(port);
1473 __team_carrier_check(port->team);
1474 return 0;
1475 }
1476
1477 static int team_user_linkup_en_option_get(struct team *team,
1478 struct team_gsetter_ctx *ctx)
1479 {
1480 struct team_port *port = ctx->info->port;
1481
1482 ctx->data.bool_val = port->user.linkup_enabled;
1483 return 0;
1484 }
1485
1486 static int team_user_linkup_en_option_set(struct team *team,
1487 struct team_gsetter_ctx *ctx)
1488 {
1489 struct team_port *port = ctx->info->port;
1490
1491 port->user.linkup_enabled = ctx->data.bool_val;
1492 team_refresh_port_linkup(port);
1493 __team_carrier_check(port->team);
1494 return 0;
1495 }
1496
1497 static int team_priority_option_get(struct team *team,
1498 struct team_gsetter_ctx *ctx)
1499 {
1500 struct team_port *port = ctx->info->port;
1501
1502 ctx->data.s32_val = port->priority;
1503 return 0;
1504 }
1505
1506 static int team_priority_option_set(struct team *team,
1507 struct team_gsetter_ctx *ctx)
1508 {
1509 struct team_port *port = ctx->info->port;
1510 s32 priority = ctx->data.s32_val;
1511
1512 if (port->priority == priority)
1513 return 0;
1514 port->priority = priority;
1515 team_queue_override_port_prio_changed(team, port);
1516 return 0;
1517 }
1518
1519 static int team_queue_id_option_get(struct team *team,
1520 struct team_gsetter_ctx *ctx)
1521 {
1522 struct team_port *port = ctx->info->port;
1523
1524 ctx->data.u32_val = port->queue_id;
1525 return 0;
1526 }
1527
1528 static int team_queue_id_option_set(struct team *team,
1529 struct team_gsetter_ctx *ctx)
1530 {
1531 struct team_port *port = ctx->info->port;
1532 u16 new_queue_id = ctx->data.u32_val;
1533
1534 if (port->queue_id == new_queue_id)
1535 return 0;
1536 if (new_queue_id >= team->dev->real_num_tx_queues)
1537 return -EINVAL;
1538 team_queue_override_port_change_queue_id(team, port, new_queue_id);
1539 return 0;
1540 }
1541
1542 static const struct team_option team_options[] = {
1543 {
1544 .name = "mode",
1545 .type = TEAM_OPTION_TYPE_STRING,
1546 .getter = team_mode_option_get,
1547 .setter = team_mode_option_set,
1548 },
1549 {
1550 .name = "notify_peers_count",
1551 .type = TEAM_OPTION_TYPE_U32,
1552 .getter = team_notify_peers_count_get,
1553 .setter = team_notify_peers_count_set,
1554 },
1555 {
1556 .name = "notify_peers_interval",
1557 .type = TEAM_OPTION_TYPE_U32,
1558 .getter = team_notify_peers_interval_get,
1559 .setter = team_notify_peers_interval_set,
1560 },
1561 {
1562 .name = "mcast_rejoin_count",
1563 .type = TEAM_OPTION_TYPE_U32,
1564 .getter = team_mcast_rejoin_count_get,
1565 .setter = team_mcast_rejoin_count_set,
1566 },
1567 {
1568 .name = "mcast_rejoin_interval",
1569 .type = TEAM_OPTION_TYPE_U32,
1570 .getter = team_mcast_rejoin_interval_get,
1571 .setter = team_mcast_rejoin_interval_set,
1572 },
1573 {
1574 .name = "enabled",
1575 .type = TEAM_OPTION_TYPE_BOOL,
1576 .per_port = true,
1577 .getter = team_port_en_option_get,
1578 .setter = team_port_en_option_set,
1579 },
1580 {
1581 .name = "user_linkup",
1582 .type = TEAM_OPTION_TYPE_BOOL,
1583 .per_port = true,
1584 .getter = team_user_linkup_option_get,
1585 .setter = team_user_linkup_option_set,
1586 },
1587 {
1588 .name = "user_linkup_enabled",
1589 .type = TEAM_OPTION_TYPE_BOOL,
1590 .per_port = true,
1591 .getter = team_user_linkup_en_option_get,
1592 .setter = team_user_linkup_en_option_set,
1593 },
1594 {
1595 .name = "priority",
1596 .type = TEAM_OPTION_TYPE_S32,
1597 .per_port = true,
1598 .getter = team_priority_option_get,
1599 .setter = team_priority_option_set,
1600 },
1601 {
1602 .name = "queue_id",
1603 .type = TEAM_OPTION_TYPE_U32,
1604 .per_port = true,
1605 .getter = team_queue_id_option_get,
1606 .setter = team_queue_id_option_set,
1607 },
1608 };
1609
1610
1611 static int team_init(struct net_device *dev)
1612 {
1613 struct team *team = netdev_priv(dev);
1614 int i;
1615 int err;
1616
1617 team->dev = dev;
1618 team_set_no_mode(team);
1619
1620 team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1621 if (!team->pcpu_stats)
1622 return -ENOMEM;
1623
1624 for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1625 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1626 INIT_LIST_HEAD(&team->port_list);
1627 err = team_queue_override_init(team);
1628 if (err)
1629 goto err_team_queue_override_init;
1630
1631 team_adjust_ops(team);
1632
1633 INIT_LIST_HEAD(&team->option_list);
1634 INIT_LIST_HEAD(&team->option_inst_list);
1635
1636 team_notify_peers_init(team);
1637 team_mcast_rejoin_init(team);
1638
1639 err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1640 if (err)
1641 goto err_options_register;
1642 netif_carrier_off(dev);
1643
1644 lockdep_register_key(&team->team_lock_key);
1645 __mutex_init(&team->lock, "team->team_lock_key", &team->team_lock_key);
1646
1647 return 0;
1648
1649 err_options_register:
1650 team_mcast_rejoin_fini(team);
1651 team_notify_peers_fini(team);
1652 team_queue_override_fini(team);
1653 err_team_queue_override_init:
1654 free_percpu(team->pcpu_stats);
1655
1656 return err;
1657 }
1658
1659 static void team_uninit(struct net_device *dev)
1660 {
1661 struct team *team = netdev_priv(dev);
1662 struct team_port *port;
1663 struct team_port *tmp;
1664
1665 mutex_lock(&team->lock);
1666 list_for_each_entry_safe(port, tmp, &team->port_list, list)
1667 team_port_del(team, port->dev);
1668
1669 __team_change_mode(team, NULL); /* cleanup */
1670 __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1671 team_mcast_rejoin_fini(team);
1672 team_notify_peers_fini(team);
1673 team_queue_override_fini(team);
1674 mutex_unlock(&team->lock);
1675 netdev_change_features(dev);
1676 lockdep_unregister_key(&team->team_lock_key);
1677 }
1678
1679 static void team_destructor(struct net_device *dev)
1680 {
1681 struct team *team = netdev_priv(dev);
1682
1683 free_percpu(team->pcpu_stats);
1684 }
1685
1686 static int team_open(struct net_device *dev)
1687 {
1688 return 0;
1689 }
1690
1691 static int team_close(struct net_device *dev)
1692 {
1693 return 0;
1694 }
1695
1696 /*
1697 * note: already called with rcu_read_lock
1698 */
1699 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1700 {
1701 struct team *team = netdev_priv(dev);
1702 bool tx_success;
1703 unsigned int len = skb->len;
1704
1705 tx_success = team_queue_override_transmit(team, skb);
1706 if (!tx_success)
1707 tx_success = team->ops.transmit(team, skb);
1708 if (tx_success) {
1709 struct team_pcpu_stats *pcpu_stats;
1710
1711 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1712 u64_stats_update_begin(&pcpu_stats->syncp);
1713 pcpu_stats->tx_packets++;
1714 pcpu_stats->tx_bytes += len;
1715 u64_stats_update_end(&pcpu_stats->syncp);
1716 } else {
1717 this_cpu_inc(team->pcpu_stats->tx_dropped);
1718 }
1719
1720 return NETDEV_TX_OK;
1721 }
1722
1723 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1724 struct net_device *sb_dev)
1725 {
1726 /*
1727 * This helper function exists to help dev_pick_tx get the correct
1728 * destination queue. Using a helper function skips a call to
1729 * skb_tx_hash and will put the skbs in the queue we expect on their
1730 * way down to the team driver.
1731 */
1732 u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1733
1734 /*
1735 * Save the original txq to restore before passing to the driver
1736 */
1737 qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1738
1739 if (unlikely(txq >= dev->real_num_tx_queues)) {
1740 do {
1741 txq -= dev->real_num_tx_queues;
1742 } while (txq >= dev->real_num_tx_queues);
1743 }
1744 return txq;
1745 }
1746
1747 static void team_change_rx_flags(struct net_device *dev, int change)
1748 {
1749 struct team *team = netdev_priv(dev);
1750 struct team_port *port;
1751 int inc;
1752
1753 rcu_read_lock();
1754 list_for_each_entry_rcu(port, &team->port_list, list) {
1755 if (change & IFF_PROMISC) {
1756 inc = dev->flags & IFF_PROMISC ? 1 : -1;
1757 dev_set_promiscuity(port->dev, inc);
1758 }
1759 if (change & IFF_ALLMULTI) {
1760 inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1761 dev_set_allmulti(port->dev, inc);
1762 }
1763 }
1764 rcu_read_unlock();
1765 }
1766
1767 static void team_set_rx_mode(struct net_device *dev)
1768 {
1769 struct team *team = netdev_priv(dev);
1770 struct team_port *port;
1771
1772 rcu_read_lock();
1773 list_for_each_entry_rcu(port, &team->port_list, list) {
1774 dev_uc_sync_multiple(port->dev, dev);
1775 dev_mc_sync_multiple(port->dev, dev);
1776 }
1777 rcu_read_unlock();
1778 }
1779
1780 static int team_set_mac_address(struct net_device *dev, void *p)
1781 {
1782 struct sockaddr *addr = p;
1783 struct team *team = netdev_priv(dev);
1784 struct team_port *port;
1785
1786 if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1787 return -EADDRNOTAVAIL;
1788 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1789 mutex_lock(&team->lock);
1790 list_for_each_entry(port, &team->port_list, list)
1791 if (team->ops.port_change_dev_addr)
1792 team->ops.port_change_dev_addr(team, port);
1793 mutex_unlock(&team->lock);
1794 return 0;
1795 }
1796
1797 static int team_change_mtu(struct net_device *dev, int new_mtu)
1798 {
1799 struct team *team = netdev_priv(dev);
1800 struct team_port *port;
1801 int err;
1802
1803 /*
1804 * Alhough this is reader, it's guarded by team lock. It's not possible
1805 * to traverse list in reverse under rcu_read_lock
1806 */
1807 mutex_lock(&team->lock);
1808 team->port_mtu_change_allowed = true;
1809 list_for_each_entry(port, &team->port_list, list) {
1810 err = dev_set_mtu(port->dev, new_mtu);
1811 if (err) {
1812 netdev_err(dev, "Device %s failed to change mtu",
1813 port->dev->name);
1814 goto unwind;
1815 }
1816 }
1817 team->port_mtu_change_allowed = false;
1818 mutex_unlock(&team->lock);
1819
1820 dev->mtu = new_mtu;
1821
1822 return 0;
1823
1824 unwind:
1825 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1826 dev_set_mtu(port->dev, dev->mtu);
1827 team->port_mtu_change_allowed = false;
1828 mutex_unlock(&team->lock);
1829
1830 return err;
1831 }
1832
1833 static void
1834 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1835 {
1836 struct team *team = netdev_priv(dev);
1837 struct team_pcpu_stats *p;
1838 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1839 u32 rx_dropped = 0, tx_dropped = 0, rx_nohandler = 0;
1840 unsigned int start;
1841 int i;
1842
1843 for_each_possible_cpu(i) {
1844 p = per_cpu_ptr(team->pcpu_stats, i);
1845 do {
1846 start = u64_stats_fetch_begin_irq(&p->syncp);
1847 rx_packets = p->rx_packets;
1848 rx_bytes = p->rx_bytes;
1849 rx_multicast = p->rx_multicast;
1850 tx_packets = p->tx_packets;
1851 tx_bytes = p->tx_bytes;
1852 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
1853
1854 stats->rx_packets += rx_packets;
1855 stats->rx_bytes += rx_bytes;
1856 stats->multicast += rx_multicast;
1857 stats->tx_packets += tx_packets;
1858 stats->tx_bytes += tx_bytes;
1859 /*
1860 * rx_dropped, tx_dropped & rx_nohandler are u32,
1861 * updated without syncp protection.
1862 */
1863 rx_dropped += p->rx_dropped;
1864 tx_dropped += p->tx_dropped;
1865 rx_nohandler += p->rx_nohandler;
1866 }
1867 stats->rx_dropped = rx_dropped;
1868 stats->tx_dropped = tx_dropped;
1869 stats->rx_nohandler = rx_nohandler;
1870 }
1871
1872 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1873 {
1874 struct team *team = netdev_priv(dev);
1875 struct team_port *port;
1876 int err;
1877
1878 /*
1879 * Alhough this is reader, it's guarded by team lock. It's not possible
1880 * to traverse list in reverse under rcu_read_lock
1881 */
1882 mutex_lock(&team->lock);
1883 list_for_each_entry(port, &team->port_list, list) {
1884 err = vlan_vid_add(port->dev, proto, vid);
1885 if (err)
1886 goto unwind;
1887 }
1888 mutex_unlock(&team->lock);
1889
1890 return 0;
1891
1892 unwind:
1893 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1894 vlan_vid_del(port->dev, proto, vid);
1895 mutex_unlock(&team->lock);
1896
1897 return err;
1898 }
1899
1900 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1901 {
1902 struct team *team = netdev_priv(dev);
1903 struct team_port *port;
1904
1905 mutex_lock(&team->lock);
1906 list_for_each_entry(port, &team->port_list, list)
1907 vlan_vid_del(port->dev, proto, vid);
1908 mutex_unlock(&team->lock);
1909
1910 return 0;
1911 }
1912
1913 #ifdef CONFIG_NET_POLL_CONTROLLER
1914 static void team_poll_controller(struct net_device *dev)
1915 {
1916 }
1917
1918 static void __team_netpoll_cleanup(struct team *team)
1919 {
1920 struct team_port *port;
1921
1922 list_for_each_entry(port, &team->port_list, list)
1923 team_port_disable_netpoll(port);
1924 }
1925
1926 static void team_netpoll_cleanup(struct net_device *dev)
1927 {
1928 struct team *team = netdev_priv(dev);
1929
1930 mutex_lock(&team->lock);
1931 __team_netpoll_cleanup(team);
1932 mutex_unlock(&team->lock);
1933 }
1934
1935 static int team_netpoll_setup(struct net_device *dev,
1936 struct netpoll_info *npifo)
1937 {
1938 struct team *team = netdev_priv(dev);
1939 struct team_port *port;
1940 int err = 0;
1941
1942 mutex_lock(&team->lock);
1943 list_for_each_entry(port, &team->port_list, list) {
1944 err = __team_port_enable_netpoll(port);
1945 if (err) {
1946 __team_netpoll_cleanup(team);
1947 break;
1948 }
1949 }
1950 mutex_unlock(&team->lock);
1951 return err;
1952 }
1953 #endif
1954
1955 static int team_add_slave(struct net_device *dev, struct net_device *port_dev,
1956 struct netlink_ext_ack *extack)
1957 {
1958 struct team *team = netdev_priv(dev);
1959 int err;
1960
1961 mutex_lock(&team->lock);
1962 err = team_port_add(team, port_dev, extack);
1963 mutex_unlock(&team->lock);
1964
1965 if (!err)
1966 netdev_change_features(dev);
1967
1968 return err;
1969 }
1970
1971 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1972 {
1973 struct team *team = netdev_priv(dev);
1974 int err;
1975
1976 mutex_lock(&team->lock);
1977 err = team_port_del(team, port_dev);
1978 mutex_unlock(&team->lock);
1979
1980 if (err)
1981 return err;
1982
1983 if (netif_is_team_master(port_dev)) {
1984 lockdep_unregister_key(&team->team_lock_key);
1985 lockdep_register_key(&team->team_lock_key);
1986 lockdep_set_class(&team->lock, &team->team_lock_key);
1987 }
1988 netdev_change_features(dev);
1989
1990 return err;
1991 }
1992
1993 static netdev_features_t team_fix_features(struct net_device *dev,
1994 netdev_features_t features)
1995 {
1996 struct team_port *port;
1997 struct team *team = netdev_priv(dev);
1998 netdev_features_t mask;
1999
2000 mask = features;
2001 features &= ~NETIF_F_ONE_FOR_ALL;
2002 features |= NETIF_F_ALL_FOR_ALL;
2003
2004 rcu_read_lock();
2005 list_for_each_entry_rcu(port, &team->port_list, list) {
2006 features = netdev_increment_features(features,
2007 port->dev->features,
2008 mask);
2009 }
2010 rcu_read_unlock();
2011
2012 features = netdev_add_tso_features(features, mask);
2013
2014 return features;
2015 }
2016
2017 static int team_change_carrier(struct net_device *dev, bool new_carrier)
2018 {
2019 struct team *team = netdev_priv(dev);
2020
2021 team->user_carrier_enabled = true;
2022
2023 if (new_carrier)
2024 netif_carrier_on(dev);
2025 else
2026 netif_carrier_off(dev);
2027 return 0;
2028 }
2029
2030 static const struct net_device_ops team_netdev_ops = {
2031 .ndo_init = team_init,
2032 .ndo_uninit = team_uninit,
2033 .ndo_open = team_open,
2034 .ndo_stop = team_close,
2035 .ndo_start_xmit = team_xmit,
2036 .ndo_select_queue = team_select_queue,
2037 .ndo_change_rx_flags = team_change_rx_flags,
2038 .ndo_set_rx_mode = team_set_rx_mode,
2039 .ndo_set_mac_address = team_set_mac_address,
2040 .ndo_change_mtu = team_change_mtu,
2041 .ndo_get_stats64 = team_get_stats64,
2042 .ndo_vlan_rx_add_vid = team_vlan_rx_add_vid,
2043 .ndo_vlan_rx_kill_vid = team_vlan_rx_kill_vid,
2044 #ifdef CONFIG_NET_POLL_CONTROLLER
2045 .ndo_poll_controller = team_poll_controller,
2046 .ndo_netpoll_setup = team_netpoll_setup,
2047 .ndo_netpoll_cleanup = team_netpoll_cleanup,
2048 #endif
2049 .ndo_add_slave = team_add_slave,
2050 .ndo_del_slave = team_del_slave,
2051 .ndo_fix_features = team_fix_features,
2052 .ndo_change_carrier = team_change_carrier,
2053 .ndo_features_check = passthru_features_check,
2054 };
2055
2056 /***********************
2057 * ethtool interface
2058 ***********************/
2059
2060 static void team_ethtool_get_drvinfo(struct net_device *dev,
2061 struct ethtool_drvinfo *drvinfo)
2062 {
2063 strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
2064 strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2065 }
2066
2067 static int team_ethtool_get_link_ksettings(struct net_device *dev,
2068 struct ethtool_link_ksettings *cmd)
2069 {
2070 struct team *team= netdev_priv(dev);
2071 unsigned long speed = 0;
2072 struct team_port *port;
2073
2074 cmd->base.duplex = DUPLEX_UNKNOWN;
2075 cmd->base.port = PORT_OTHER;
2076
2077 rcu_read_lock();
2078 list_for_each_entry_rcu(port, &team->port_list, list) {
2079 if (team_port_txable(port)) {
2080 if (port->state.speed != SPEED_UNKNOWN)
2081 speed += port->state.speed;
2082 if (cmd->base.duplex == DUPLEX_UNKNOWN &&
2083 port->state.duplex != DUPLEX_UNKNOWN)
2084 cmd->base.duplex = port->state.duplex;
2085 }
2086 }
2087 rcu_read_unlock();
2088
2089 cmd->base.speed = speed ? : SPEED_UNKNOWN;
2090
2091 return 0;
2092 }
2093
2094 static const struct ethtool_ops team_ethtool_ops = {
2095 .get_drvinfo = team_ethtool_get_drvinfo,
2096 .get_link = ethtool_op_get_link,
2097 .get_link_ksettings = team_ethtool_get_link_ksettings,
2098 };
2099
2100 /***********************
2101 * rt netlink interface
2102 ***********************/
2103
2104 static void team_setup_by_port(struct net_device *dev,
2105 struct net_device *port_dev)
2106 {
2107 dev->header_ops = port_dev->header_ops;
2108 dev->type = port_dev->type;
2109 dev->hard_header_len = port_dev->hard_header_len;
2110 dev->addr_len = port_dev->addr_len;
2111 dev->mtu = port_dev->mtu;
2112 memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2113 eth_hw_addr_inherit(dev, port_dev);
2114 }
2115
2116 static int team_dev_type_check_change(struct net_device *dev,
2117 struct net_device *port_dev)
2118 {
2119 struct team *team = netdev_priv(dev);
2120 char *portname = port_dev->name;
2121 int err;
2122
2123 if (dev->type == port_dev->type)
2124 return 0;
2125 if (!list_empty(&team->port_list)) {
2126 netdev_err(dev, "Device %s is of different type\n", portname);
2127 return -EBUSY;
2128 }
2129 err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2130 err = notifier_to_errno(err);
2131 if (err) {
2132 netdev_err(dev, "Refused to change device type\n");
2133 return err;
2134 }
2135 dev_uc_flush(dev);
2136 dev_mc_flush(dev);
2137 team_setup_by_port(dev, port_dev);
2138 call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2139 return 0;
2140 }
2141
2142 static void team_setup(struct net_device *dev)
2143 {
2144 ether_setup(dev);
2145 dev->max_mtu = ETH_MAX_MTU;
2146
2147 dev->netdev_ops = &team_netdev_ops;
2148 dev->ethtool_ops = &team_ethtool_ops;
2149 dev->needs_free_netdev = true;
2150 dev->priv_destructor = team_destructor;
2151 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2152 dev->priv_flags |= IFF_NO_QUEUE;
2153 dev->priv_flags |= IFF_TEAM;
2154
2155 /*
2156 * Indicate we support unicast address filtering. That way core won't
2157 * bring us to promisc mode in case a unicast addr is added.
2158 * Let this up to underlay drivers.
2159 */
2160 dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2161
2162 dev->features |= NETIF_F_LLTX;
2163 dev->features |= NETIF_F_GRO;
2164
2165 /* Don't allow team devices to change network namespaces. */
2166 dev->features |= NETIF_F_NETNS_LOCAL;
2167
2168 dev->hw_features = TEAM_VLAN_FEATURES |
2169 NETIF_F_HW_VLAN_CTAG_RX |
2170 NETIF_F_HW_VLAN_CTAG_FILTER;
2171
2172 dev->hw_features |= NETIF_F_GSO_ENCAP_ALL | NETIF_F_GSO_UDP_L4;
2173 dev->features |= dev->hw_features;
2174 dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
2175 }
2176
2177 static int team_newlink(struct net *src_net, struct net_device *dev,
2178 struct nlattr *tb[], struct nlattr *data[],
2179 struct netlink_ext_ack *extack)
2180 {
2181 if (tb[IFLA_ADDRESS] == NULL)
2182 eth_hw_addr_random(dev);
2183
2184 return register_netdevice(dev);
2185 }
2186
2187 static int team_validate(struct nlattr *tb[], struct nlattr *data[],
2188 struct netlink_ext_ack *extack)
2189 {
2190 if (tb[IFLA_ADDRESS]) {
2191 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2192 return -EINVAL;
2193 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2194 return -EADDRNOTAVAIL;
2195 }
2196 return 0;
2197 }
2198
2199 static unsigned int team_get_num_tx_queues(void)
2200 {
2201 return TEAM_DEFAULT_NUM_TX_QUEUES;
2202 }
2203
2204 static unsigned int team_get_num_rx_queues(void)
2205 {
2206 return TEAM_DEFAULT_NUM_RX_QUEUES;
2207 }
2208
2209 static struct rtnl_link_ops team_link_ops __read_mostly = {
2210 .kind = DRV_NAME,
2211 .priv_size = sizeof(struct team),
2212 .setup = team_setup,
2213 .newlink = team_newlink,
2214 .validate = team_validate,
2215 .get_num_tx_queues = team_get_num_tx_queues,
2216 .get_num_rx_queues = team_get_num_rx_queues,
2217 };
2218
2219
2220 /***********************************
2221 * Generic netlink custom interface
2222 ***********************************/
2223
2224 static struct genl_family team_nl_family;
2225
2226 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2227 [TEAM_ATTR_UNSPEC] = { .type = NLA_UNSPEC, },
2228 [TEAM_ATTR_TEAM_IFINDEX] = { .type = NLA_U32 },
2229 [TEAM_ATTR_LIST_OPTION] = { .type = NLA_NESTED },
2230 [TEAM_ATTR_LIST_PORT] = { .type = NLA_NESTED },
2231 };
2232
2233 static const struct nla_policy
2234 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2235 [TEAM_ATTR_OPTION_UNSPEC] = { .type = NLA_UNSPEC, },
2236 [TEAM_ATTR_OPTION_NAME] = {
2237 .type = NLA_STRING,
2238 .len = TEAM_STRING_MAX_LEN,
2239 },
2240 [TEAM_ATTR_OPTION_CHANGED] = { .type = NLA_FLAG },
2241 [TEAM_ATTR_OPTION_TYPE] = { .type = NLA_U8 },
2242 [TEAM_ATTR_OPTION_DATA] = { .type = NLA_BINARY },
2243 };
2244
2245 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2246 {
2247 struct sk_buff *msg;
2248 void *hdr;
2249 int err;
2250
2251 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2252 if (!msg)
2253 return -ENOMEM;
2254
2255 hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2256 &team_nl_family, 0, TEAM_CMD_NOOP);
2257 if (!hdr) {
2258 err = -EMSGSIZE;
2259 goto err_msg_put;
2260 }
2261
2262 genlmsg_end(msg, hdr);
2263
2264 return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2265
2266 err_msg_put:
2267 nlmsg_free(msg);
2268
2269 return err;
2270 }
2271
2272 /*
2273 * Netlink cmd functions should be locked by following two functions.
2274 * Since dev gets held here, that ensures dev won't disappear in between.
2275 */
2276 static struct team *team_nl_team_get(struct genl_info *info)
2277 {
2278 struct net *net = genl_info_net(info);
2279 int ifindex;
2280 struct net_device *dev;
2281 struct team *team;
2282
2283 if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2284 return NULL;
2285
2286 ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2287 dev = dev_get_by_index(net, ifindex);
2288 if (!dev || dev->netdev_ops != &team_netdev_ops) {
2289 if (dev)
2290 dev_put(dev);
2291 return NULL;
2292 }
2293
2294 team = netdev_priv(dev);
2295 mutex_lock(&team->lock);
2296 return team;
2297 }
2298
2299 static void team_nl_team_put(struct team *team)
2300 {
2301 mutex_unlock(&team->lock);
2302 dev_put(team->dev);
2303 }
2304
2305 typedef int team_nl_send_func_t(struct sk_buff *skb,
2306 struct team *team, u32 portid);
2307
2308 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2309 {
2310 return genlmsg_unicast(dev_net(team->dev), skb, portid);
2311 }
2312
2313 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2314 struct team_option_inst *opt_inst)
2315 {
2316 struct nlattr *option_item;
2317 struct team_option *option = opt_inst->option;
2318 struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2319 struct team_gsetter_ctx ctx;
2320 int err;
2321
2322 ctx.info = opt_inst_info;
2323 err = team_option_get(team, opt_inst, &ctx);
2324 if (err)
2325 return err;
2326
2327 option_item = nla_nest_start_noflag(skb, TEAM_ATTR_ITEM_OPTION);
2328 if (!option_item)
2329 return -EMSGSIZE;
2330
2331 if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2332 goto nest_cancel;
2333 if (opt_inst_info->port &&
2334 nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2335 opt_inst_info->port->dev->ifindex))
2336 goto nest_cancel;
2337 if (opt_inst->option->array_size &&
2338 nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2339 opt_inst_info->array_index))
2340 goto nest_cancel;
2341
2342 switch (option->type) {
2343 case TEAM_OPTION_TYPE_U32:
2344 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2345 goto nest_cancel;
2346 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2347 goto nest_cancel;
2348 break;
2349 case TEAM_OPTION_TYPE_STRING:
2350 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2351 goto nest_cancel;
2352 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2353 ctx.data.str_val))
2354 goto nest_cancel;
2355 break;
2356 case TEAM_OPTION_TYPE_BINARY:
2357 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2358 goto nest_cancel;
2359 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2360 ctx.data.bin_val.ptr))
2361 goto nest_cancel;
2362 break;
2363 case TEAM_OPTION_TYPE_BOOL:
2364 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2365 goto nest_cancel;
2366 if (ctx.data.bool_val &&
2367 nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2368 goto nest_cancel;
2369 break;
2370 case TEAM_OPTION_TYPE_S32:
2371 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2372 goto nest_cancel;
2373 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2374 goto nest_cancel;
2375 break;
2376 default:
2377 BUG();
2378 }
2379 if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2380 goto nest_cancel;
2381 if (opt_inst->changed) {
2382 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2383 goto nest_cancel;
2384 opt_inst->changed = false;
2385 }
2386 nla_nest_end(skb, option_item);
2387 return 0;
2388
2389 nest_cancel:
2390 nla_nest_cancel(skb, option_item);
2391 return -EMSGSIZE;
2392 }
2393
2394 static int __send_and_alloc_skb(struct sk_buff **pskb,
2395 struct team *team, u32 portid,
2396 team_nl_send_func_t *send_func)
2397 {
2398 int err;
2399
2400 if (*pskb) {
2401 err = send_func(*pskb, team, portid);
2402 if (err)
2403 return err;
2404 }
2405 *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2406 if (!*pskb)
2407 return -ENOMEM;
2408 return 0;
2409 }
2410
2411 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2412 int flags, team_nl_send_func_t *send_func,
2413 struct list_head *sel_opt_inst_list)
2414 {
2415 struct nlattr *option_list;
2416 struct nlmsghdr *nlh;
2417 void *hdr;
2418 struct team_option_inst *opt_inst;
2419 int err;
2420 struct sk_buff *skb = NULL;
2421 bool incomplete;
2422 int i;
2423
2424 opt_inst = list_first_entry(sel_opt_inst_list,
2425 struct team_option_inst, tmp_list);
2426
2427 start_again:
2428 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2429 if (err)
2430 return err;
2431
2432 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2433 TEAM_CMD_OPTIONS_GET);
2434 if (!hdr) {
2435 nlmsg_free(skb);
2436 return -EMSGSIZE;
2437 }
2438
2439 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2440 goto nla_put_failure;
2441 option_list = nla_nest_start_noflag(skb, TEAM_ATTR_LIST_OPTION);
2442 if (!option_list)
2443 goto nla_put_failure;
2444
2445 i = 0;
2446 incomplete = false;
2447 list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2448 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2449 if (err) {
2450 if (err == -EMSGSIZE) {
2451 if (!i)
2452 goto errout;
2453 incomplete = true;
2454 break;
2455 }
2456 goto errout;
2457 }
2458 i++;
2459 }
2460
2461 nla_nest_end(skb, option_list);
2462 genlmsg_end(skb, hdr);
2463 if (incomplete)
2464 goto start_again;
2465
2466 send_done:
2467 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2468 if (!nlh) {
2469 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2470 if (err)
2471 return err;
2472 goto send_done;
2473 }
2474
2475 return send_func(skb, team, portid);
2476
2477 nla_put_failure:
2478 err = -EMSGSIZE;
2479 errout:
2480 nlmsg_free(skb);
2481 return err;
2482 }
2483
2484 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2485 {
2486 struct team *team;
2487 struct team_option_inst *opt_inst;
2488 int err;
2489 LIST_HEAD(sel_opt_inst_list);
2490
2491 team = team_nl_team_get(info);
2492 if (!team)
2493 return -EINVAL;
2494
2495 list_for_each_entry(opt_inst, &team->option_inst_list, list)
2496 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2497 err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2498 NLM_F_ACK, team_nl_send_unicast,
2499 &sel_opt_inst_list);
2500
2501 team_nl_team_put(team);
2502
2503 return err;
2504 }
2505
2506 static int team_nl_send_event_options_get(struct team *team,
2507 struct list_head *sel_opt_inst_list);
2508
2509 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2510 {
2511 struct team *team;
2512 int err = 0;
2513 int i;
2514 struct nlattr *nl_option;
2515
2516 rtnl_lock();
2517
2518 team = team_nl_team_get(info);
2519 if (!team) {
2520 err = -EINVAL;
2521 goto rtnl_unlock;
2522 }
2523
2524 err = -EINVAL;
2525 if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2526 err = -EINVAL;
2527 goto team_put;
2528 }
2529
2530 nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2531 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2532 struct nlattr *attr;
2533 struct nlattr *attr_data;
2534 LIST_HEAD(opt_inst_list);
2535 enum team_option_type opt_type;
2536 int opt_port_ifindex = 0; /* != 0 for per-port options */
2537 u32 opt_array_index = 0;
2538 bool opt_is_array = false;
2539 struct team_option_inst *opt_inst;
2540 char *opt_name;
2541 bool opt_found = false;
2542
2543 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2544 err = -EINVAL;
2545 goto team_put;
2546 }
2547 err = nla_parse_nested_deprecated(opt_attrs,
2548 TEAM_ATTR_OPTION_MAX,
2549 nl_option,
2550 team_nl_option_policy,
2551 info->extack);
2552 if (err)
2553 goto team_put;
2554 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2555 !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2556 err = -EINVAL;
2557 goto team_put;
2558 }
2559 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2560 case NLA_U32:
2561 opt_type = TEAM_OPTION_TYPE_U32;
2562 break;
2563 case NLA_STRING:
2564 opt_type = TEAM_OPTION_TYPE_STRING;
2565 break;
2566 case NLA_BINARY:
2567 opt_type = TEAM_OPTION_TYPE_BINARY;
2568 break;
2569 case NLA_FLAG:
2570 opt_type = TEAM_OPTION_TYPE_BOOL;
2571 break;
2572 case NLA_S32:
2573 opt_type = TEAM_OPTION_TYPE_S32;
2574 break;
2575 default:
2576 goto team_put;
2577 }
2578
2579 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2580 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2581 err = -EINVAL;
2582 goto team_put;
2583 }
2584
2585 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2586 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2587 if (attr)
2588 opt_port_ifindex = nla_get_u32(attr);
2589
2590 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2591 if (attr) {
2592 opt_is_array = true;
2593 opt_array_index = nla_get_u32(attr);
2594 }
2595
2596 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2597 struct team_option *option = opt_inst->option;
2598 struct team_gsetter_ctx ctx;
2599 struct team_option_inst_info *opt_inst_info;
2600 int tmp_ifindex;
2601
2602 opt_inst_info = &opt_inst->info;
2603 tmp_ifindex = opt_inst_info->port ?
2604 opt_inst_info->port->dev->ifindex : 0;
2605 if (option->type != opt_type ||
2606 strcmp(option->name, opt_name) ||
2607 tmp_ifindex != opt_port_ifindex ||
2608 (option->array_size && !opt_is_array) ||
2609 opt_inst_info->array_index != opt_array_index)
2610 continue;
2611 opt_found = true;
2612 ctx.info = opt_inst_info;
2613 switch (opt_type) {
2614 case TEAM_OPTION_TYPE_U32:
2615 ctx.data.u32_val = nla_get_u32(attr_data);
2616 break;
2617 case TEAM_OPTION_TYPE_STRING:
2618 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2619 err = -EINVAL;
2620 goto team_put;
2621 }
2622 ctx.data.str_val = nla_data(attr_data);
2623 break;
2624 case TEAM_OPTION_TYPE_BINARY:
2625 ctx.data.bin_val.len = nla_len(attr_data);
2626 ctx.data.bin_val.ptr = nla_data(attr_data);
2627 break;
2628 case TEAM_OPTION_TYPE_BOOL:
2629 ctx.data.bool_val = attr_data ? true : false;
2630 break;
2631 case TEAM_OPTION_TYPE_S32:
2632 ctx.data.s32_val = nla_get_s32(attr_data);
2633 break;
2634 default:
2635 BUG();
2636 }
2637 err = team_option_set(team, opt_inst, &ctx);
2638 if (err)
2639 goto team_put;
2640 opt_inst->changed = true;
2641 list_add(&opt_inst->tmp_list, &opt_inst_list);
2642 }
2643 if (!opt_found) {
2644 err = -ENOENT;
2645 goto team_put;
2646 }
2647
2648 err = team_nl_send_event_options_get(team, &opt_inst_list);
2649 if (err)
2650 break;
2651 }
2652
2653 team_put:
2654 team_nl_team_put(team);
2655 rtnl_unlock:
2656 rtnl_unlock();
2657 return err;
2658 }
2659
2660 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2661 struct team_port *port)
2662 {
2663 struct nlattr *port_item;
2664
2665 port_item = nla_nest_start_noflag(skb, TEAM_ATTR_ITEM_PORT);
2666 if (!port_item)
2667 goto nest_cancel;
2668 if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2669 goto nest_cancel;
2670 if (port->changed) {
2671 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2672 goto nest_cancel;
2673 port->changed = false;
2674 }
2675 if ((port->removed &&
2676 nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2677 (port->state.linkup &&
2678 nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2679 nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2680 nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2681 goto nest_cancel;
2682 nla_nest_end(skb, port_item);
2683 return 0;
2684
2685 nest_cancel:
2686 nla_nest_cancel(skb, port_item);
2687 return -EMSGSIZE;
2688 }
2689
2690 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2691 int flags, team_nl_send_func_t *send_func,
2692 struct team_port *one_port)
2693 {
2694 struct nlattr *port_list;
2695 struct nlmsghdr *nlh;
2696 void *hdr;
2697 struct team_port *port;
2698 int err;
2699 struct sk_buff *skb = NULL;
2700 bool incomplete;
2701 int i;
2702
2703 port = list_first_entry_or_null(&team->port_list,
2704 struct team_port, list);
2705
2706 start_again:
2707 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2708 if (err)
2709 return err;
2710
2711 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2712 TEAM_CMD_PORT_LIST_GET);
2713 if (!hdr) {
2714 nlmsg_free(skb);
2715 return -EMSGSIZE;
2716 }
2717
2718 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2719 goto nla_put_failure;
2720 port_list = nla_nest_start_noflag(skb, TEAM_ATTR_LIST_PORT);
2721 if (!port_list)
2722 goto nla_put_failure;
2723
2724 i = 0;
2725 incomplete = false;
2726
2727 /* If one port is selected, called wants to send port list containing
2728 * only this port. Otherwise go through all listed ports and send all
2729 */
2730 if (one_port) {
2731 err = team_nl_fill_one_port_get(skb, one_port);
2732 if (err)
2733 goto errout;
2734 } else if (port) {
2735 list_for_each_entry_from(port, &team->port_list, list) {
2736 err = team_nl_fill_one_port_get(skb, port);
2737 if (err) {
2738 if (err == -EMSGSIZE) {
2739 if (!i)
2740 goto errout;
2741 incomplete = true;
2742 break;
2743 }
2744 goto errout;
2745 }
2746 i++;
2747 }
2748 }
2749
2750 nla_nest_end(skb, port_list);
2751 genlmsg_end(skb, hdr);
2752 if (incomplete)
2753 goto start_again;
2754
2755 send_done:
2756 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2757 if (!nlh) {
2758 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2759 if (err)
2760 return err;
2761 goto send_done;
2762 }
2763
2764 return send_func(skb, team, portid);
2765
2766 nla_put_failure:
2767 err = -EMSGSIZE;
2768 errout:
2769 nlmsg_free(skb);
2770 return err;
2771 }
2772
2773 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2774 struct genl_info *info)
2775 {
2776 struct team *team;
2777 int err;
2778
2779 team = team_nl_team_get(info);
2780 if (!team)
2781 return -EINVAL;
2782
2783 err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2784 NLM_F_ACK, team_nl_send_unicast, NULL);
2785
2786 team_nl_team_put(team);
2787
2788 return err;
2789 }
2790
2791 static const struct genl_ops team_nl_ops[] = {
2792 {
2793 .cmd = TEAM_CMD_NOOP,
2794 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2795 .doit = team_nl_cmd_noop,
2796 },
2797 {
2798 .cmd = TEAM_CMD_OPTIONS_SET,
2799 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2800 .doit = team_nl_cmd_options_set,
2801 .flags = GENL_ADMIN_PERM,
2802 },
2803 {
2804 .cmd = TEAM_CMD_OPTIONS_GET,
2805 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2806 .doit = team_nl_cmd_options_get,
2807 .flags = GENL_ADMIN_PERM,
2808 },
2809 {
2810 .cmd = TEAM_CMD_PORT_LIST_GET,
2811 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2812 .doit = team_nl_cmd_port_list_get,
2813 .flags = GENL_ADMIN_PERM,
2814 },
2815 };
2816
2817 static const struct genl_multicast_group team_nl_mcgrps[] = {
2818 { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2819 };
2820
2821 static struct genl_family team_nl_family __ro_after_init = {
2822 .name = TEAM_GENL_NAME,
2823 .version = TEAM_GENL_VERSION,
2824 .maxattr = TEAM_ATTR_MAX,
2825 .policy = team_nl_policy,
2826 .netnsok = true,
2827 .module = THIS_MODULE,
2828 .ops = team_nl_ops,
2829 .n_ops = ARRAY_SIZE(team_nl_ops),
2830 .mcgrps = team_nl_mcgrps,
2831 .n_mcgrps = ARRAY_SIZE(team_nl_mcgrps),
2832 };
2833
2834 static int team_nl_send_multicast(struct sk_buff *skb,
2835 struct team *team, u32 portid)
2836 {
2837 return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2838 skb, 0, 0, GFP_KERNEL);
2839 }
2840
2841 static int team_nl_send_event_options_get(struct team *team,
2842 struct list_head *sel_opt_inst_list)
2843 {
2844 return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2845 sel_opt_inst_list);
2846 }
2847
2848 static int team_nl_send_event_port_get(struct team *team,
2849 struct team_port *port)
2850 {
2851 return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2852 port);
2853 }
2854
2855 static int __init team_nl_init(void)
2856 {
2857 return genl_register_family(&team_nl_family);
2858 }
2859
2860 static void team_nl_fini(void)
2861 {
2862 genl_unregister_family(&team_nl_family);
2863 }
2864
2865
2866 /******************
2867 * Change checkers
2868 ******************/
2869
2870 static void __team_options_change_check(struct team *team)
2871 {
2872 int err;
2873 struct team_option_inst *opt_inst;
2874 LIST_HEAD(sel_opt_inst_list);
2875
2876 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2877 if (opt_inst->changed)
2878 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2879 }
2880 err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2881 if (err && err != -ESRCH)
2882 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2883 err);
2884 }
2885
2886 /* rtnl lock is held */
2887
2888 static void __team_port_change_send(struct team_port *port, bool linkup)
2889 {
2890 int err;
2891
2892 port->changed = true;
2893 port->state.linkup = linkup;
2894 team_refresh_port_linkup(port);
2895 if (linkup) {
2896 struct ethtool_link_ksettings ecmd;
2897
2898 err = __ethtool_get_link_ksettings(port->dev, &ecmd);
2899 if (!err) {
2900 port->state.speed = ecmd.base.speed;
2901 port->state.duplex = ecmd.base.duplex;
2902 goto send_event;
2903 }
2904 }
2905 port->state.speed = 0;
2906 port->state.duplex = 0;
2907
2908 send_event:
2909 err = team_nl_send_event_port_get(port->team, port);
2910 if (err && err != -ESRCH)
2911 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2912 port->dev->name, err);
2913
2914 }
2915
2916 static void __team_carrier_check(struct team *team)
2917 {
2918 struct team_port *port;
2919 bool team_linkup;
2920
2921 if (team->user_carrier_enabled)
2922 return;
2923
2924 team_linkup = false;
2925 list_for_each_entry(port, &team->port_list, list) {
2926 if (port->linkup) {
2927 team_linkup = true;
2928 break;
2929 }
2930 }
2931
2932 if (team_linkup)
2933 netif_carrier_on(team->dev);
2934 else
2935 netif_carrier_off(team->dev);
2936 }
2937
2938 static void __team_port_change_check(struct team_port *port, bool linkup)
2939 {
2940 if (port->state.linkup != linkup)
2941 __team_port_change_send(port, linkup);
2942 __team_carrier_check(port->team);
2943 }
2944
2945 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2946 {
2947 __team_port_change_send(port, linkup);
2948 __team_carrier_check(port->team);
2949 }
2950
2951 static void __team_port_change_port_removed(struct team_port *port)
2952 {
2953 port->removed = true;
2954 __team_port_change_send(port, false);
2955 __team_carrier_check(port->team);
2956 }
2957
2958 static void team_port_change_check(struct team_port *port, bool linkup)
2959 {
2960 struct team *team = port->team;
2961
2962 mutex_lock(&team->lock);
2963 __team_port_change_check(port, linkup);
2964 mutex_unlock(&team->lock);
2965 }
2966
2967
2968 /************************************
2969 * Net device notifier event handler
2970 ************************************/
2971
2972 static int team_device_event(struct notifier_block *unused,
2973 unsigned long event, void *ptr)
2974 {
2975 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2976 struct team_port *port;
2977
2978 port = team_port_get_rtnl(dev);
2979 if (!port)
2980 return NOTIFY_DONE;
2981
2982 switch (event) {
2983 case NETDEV_UP:
2984 if (netif_oper_up(dev))
2985 team_port_change_check(port, true);
2986 break;
2987 case NETDEV_DOWN:
2988 team_port_change_check(port, false);
2989 break;
2990 case NETDEV_CHANGE:
2991 if (netif_running(port->dev))
2992 team_port_change_check(port,
2993 !!netif_oper_up(port->dev));
2994 break;
2995 case NETDEV_UNREGISTER:
2996 team_del_slave(port->team->dev, dev);
2997 break;
2998 case NETDEV_FEAT_CHANGE:
2999 team_compute_features(port->team);
3000 break;
3001 case NETDEV_PRECHANGEMTU:
3002 /* Forbid to change mtu of underlaying device */
3003 if (!port->team->port_mtu_change_allowed)
3004 return NOTIFY_BAD;
3005 break;
3006 case NETDEV_PRE_TYPE_CHANGE:
3007 /* Forbid to change type of underlaying device */
3008 return NOTIFY_BAD;
3009 case NETDEV_RESEND_IGMP:
3010 /* Propagate to master device */
3011 call_netdevice_notifiers(event, port->team->dev);
3012 break;
3013 }
3014 return NOTIFY_DONE;
3015 }
3016
3017 static struct notifier_block team_notifier_block __read_mostly = {
3018 .notifier_call = team_device_event,
3019 };
3020
3021
3022 /***********************
3023 * Module init and exit
3024 ***********************/
3025
3026 static int __init team_module_init(void)
3027 {
3028 int err;
3029
3030 register_netdevice_notifier(&team_notifier_block);
3031
3032 err = rtnl_link_register(&team_link_ops);
3033 if (err)
3034 goto err_rtnl_reg;
3035
3036 err = team_nl_init();
3037 if (err)
3038 goto err_nl_init;
3039
3040 return 0;
3041
3042 err_nl_init:
3043 rtnl_link_unregister(&team_link_ops);
3044
3045 err_rtnl_reg:
3046 unregister_netdevice_notifier(&team_notifier_block);
3047
3048 return err;
3049 }
3050
3051 static void __exit team_module_exit(void)
3052 {
3053 team_nl_fini();
3054 rtnl_link_unregister(&team_link_ops);
3055 unregister_netdevice_notifier(&team_notifier_block);
3056 }
3057
3058 module_init(team_module_init);
3059 module_exit(team_module_exit);
3060
3061 MODULE_LICENSE("GPL v2");
3062 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
3063 MODULE_DESCRIPTION("Ethernet team device driver");
3064 MODULE_ALIAS_RTNL_LINK(DRV_NAME);
Linux with added FPC-III support