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irqchip/s3c24xx: Mark init_eint as __maybe_unused
[linux/fpc-iii.git] / drivers / net / team / team.c
blob651d35ea22c5f8335b50c0b0aa75c834eb4c83c5
1 /*
2 * drivers/net/team/team.c - Network team device driver
3 * Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 */
10
11 #include <linux/kernel.h>
12 #include <linux/types.h>
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/slab.h>
16 #include <linux/rcupdate.h>
17 #include <linux/errno.h>
18 #include <linux/ctype.h>
19 #include <linux/notifier.h>
20 #include <linux/netdevice.h>
21 #include <linux/netpoll.h>
22 #include <linux/if_vlan.h>
23 #include <linux/if_arp.h>
24 #include <linux/socket.h>
25 #include <linux/etherdevice.h>
26 #include <linux/rtnetlink.h>
27 #include <net/rtnetlink.h>
28 #include <net/genetlink.h>
29 #include <net/netlink.h>
30 #include <net/sch_generic.h>
31 #include <net/switchdev.h>
32 #include <generated/utsrelease.h>
33 #include <linux/if_team.h>
34
35 #define DRV_NAME "team"
36
37
38 /**********
39 * Helpers
40 **********/
41
42 #define team_port_exists(dev) (dev->priv_flags & IFF_TEAM_PORT)
43
44 static struct team_port *team_port_get_rcu(const struct net_device *dev)
45 {
46 return rcu_dereference(dev->rx_handler_data);
47 }
48
49 static struct team_port *team_port_get_rtnl(const struct net_device *dev)
50 {
51 struct team_port *port = rtnl_dereference(dev->rx_handler_data);
52
53 return team_port_exists(dev) ? port : NULL;
54 }
55
56 /*
57 * Since the ability to change device address for open port device is tested in
58 * team_port_add, this function can be called without control of return value
59 */
60 static int __set_port_dev_addr(struct net_device *port_dev,
61 const unsigned char *dev_addr)
62 {
63 struct sockaddr addr;
64
65 memcpy(addr.sa_data, dev_addr, port_dev->addr_len);
66 addr.sa_family = port_dev->type;
67 return dev_set_mac_address(port_dev, &addr);
68 }
69
70 static int team_port_set_orig_dev_addr(struct team_port *port)
71 {
72 return __set_port_dev_addr(port->dev, port->orig.dev_addr);
73 }
74
75 static int team_port_set_team_dev_addr(struct team *team,
76 struct team_port *port)
77 {
78 return __set_port_dev_addr(port->dev, team->dev->dev_addr);
79 }
80
81 int team_modeop_port_enter(struct team *team, struct team_port *port)
82 {
83 return team_port_set_team_dev_addr(team, port);
84 }
85 EXPORT_SYMBOL(team_modeop_port_enter);
86
87 void team_modeop_port_change_dev_addr(struct team *team,
88 struct team_port *port)
89 {
90 team_port_set_team_dev_addr(team, port);
91 }
92 EXPORT_SYMBOL(team_modeop_port_change_dev_addr);
93
94 static void team_refresh_port_linkup(struct team_port *port)
95 {
96 port->linkup = port->user.linkup_enabled ? port->user.linkup :
97 port->state.linkup;
98 }
99
100
101 /*******************
102 * Options handling
103 *******************/
104
105 struct team_option_inst { /* One for each option instance */
106 struct list_head list;
107 struct list_head tmp_list;
108 struct team_option *option;
109 struct team_option_inst_info info;
110 bool changed;
111 bool removed;
112 };
113
114 static struct team_option *__team_find_option(struct team *team,
115 const char *opt_name)
116 {
117 struct team_option *option;
118
119 list_for_each_entry(option, &team->option_list, list) {
120 if (strcmp(option->name, opt_name) == 0)
121 return option;
122 }
123 return NULL;
124 }
125
126 static void __team_option_inst_del(struct team_option_inst *opt_inst)
127 {
128 list_del(&opt_inst->list);
129 kfree(opt_inst);
130 }
131
132 static void __team_option_inst_del_option(struct team *team,
133 struct team_option *option)
134 {
135 struct team_option_inst *opt_inst, *tmp;
136
137 list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
138 if (opt_inst->option == option)
139 __team_option_inst_del(opt_inst);
140 }
141 }
142
143 static int __team_option_inst_add(struct team *team, struct team_option *option,
144 struct team_port *port)
145 {
146 struct team_option_inst *opt_inst;
147 unsigned int array_size;
148 unsigned int i;
149 int err;
150
151 array_size = option->array_size;
152 if (!array_size)
153 array_size = 1; /* No array but still need one instance */
154
155 for (i = 0; i < array_size; i++) {
156 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL);
157 if (!opt_inst)
158 return -ENOMEM;
159 opt_inst->option = option;
160 opt_inst->info.port = port;
161 opt_inst->info.array_index = i;
162 opt_inst->changed = true;
163 opt_inst->removed = false;
164 list_add_tail(&opt_inst->list, &team->option_inst_list);
165 if (option->init) {
166 err = option->init(team, &opt_inst->info);
167 if (err)
168 return err;
169 }
170
171 }
172 return 0;
173 }
174
175 static int __team_option_inst_add_option(struct team *team,
176 struct team_option *option)
177 {
178 int err;
179
180 if (!option->per_port) {
181 err = __team_option_inst_add(team, option, NULL);
182 if (err)
183 goto inst_del_option;
184 }
185 return 0;
186
187 inst_del_option:
188 __team_option_inst_del_option(team, option);
189 return err;
190 }
191
192 static void __team_option_inst_mark_removed_option(struct team *team,
193 struct team_option *option)
194 {
195 struct team_option_inst *opt_inst;
196
197 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
198 if (opt_inst->option == option) {
199 opt_inst->changed = true;
200 opt_inst->removed = true;
201 }
202 }
203 }
204
205 static void __team_option_inst_del_port(struct team *team,
206 struct team_port *port)
207 {
208 struct team_option_inst *opt_inst, *tmp;
209
210 list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
211 if (opt_inst->option->per_port &&
212 opt_inst->info.port == port)
213 __team_option_inst_del(opt_inst);
214 }
215 }
216
217 static int __team_option_inst_add_port(struct team *team,
218 struct team_port *port)
219 {
220 struct team_option *option;
221 int err;
222
223 list_for_each_entry(option, &team->option_list, list) {
224 if (!option->per_port)
225 continue;
226 err = __team_option_inst_add(team, option, port);
227 if (err)
228 goto inst_del_port;
229 }
230 return 0;
231
232 inst_del_port:
233 __team_option_inst_del_port(team, port);
234 return err;
235 }
236
237 static void __team_option_inst_mark_removed_port(struct team *team,
238 struct team_port *port)
239 {
240 struct team_option_inst *opt_inst;
241
242 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
243 if (opt_inst->info.port == port) {
244 opt_inst->changed = true;
245 opt_inst->removed = true;
246 }
247 }
248 }
249
250 static int __team_options_register(struct team *team,
251 const struct team_option *option,
252 size_t option_count)
253 {
254 int i;
255 struct team_option **dst_opts;
256 int err;
257
258 dst_opts = kzalloc(sizeof(struct team_option *) * option_count,
259 GFP_KERNEL);
260 if (!dst_opts)
261 return -ENOMEM;
262 for (i = 0; i < option_count; i++, option++) {
263 if (__team_find_option(team, option->name)) {
264 err = -EEXIST;
265 goto alloc_rollback;
266 }
267 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
268 if (!dst_opts[i]) {
269 err = -ENOMEM;
270 goto alloc_rollback;
271 }
272 }
273
274 for (i = 0; i < option_count; i++) {
275 err = __team_option_inst_add_option(team, dst_opts[i]);
276 if (err)
277 goto inst_rollback;
278 list_add_tail(&dst_opts[i]->list, &team->option_list);
279 }
280
281 kfree(dst_opts);
282 return 0;
283
284 inst_rollback:
285 for (i--; i >= 0; i--)
286 __team_option_inst_del_option(team, dst_opts[i]);
287
288 i = option_count - 1;
289 alloc_rollback:
290 for (i--; i >= 0; i--)
291 kfree(dst_opts[i]);
292
293 kfree(dst_opts);
294 return err;
295 }
296
297 static void __team_options_mark_removed(struct team *team,
298 const struct team_option *option,
299 size_t option_count)
300 {
301 int i;
302
303 for (i = 0; i < option_count; i++, option++) {
304 struct team_option *del_opt;
305
306 del_opt = __team_find_option(team, option->name);
307 if (del_opt)
308 __team_option_inst_mark_removed_option(team, del_opt);
309 }
310 }
311
312 static void __team_options_unregister(struct team *team,
313 const struct team_option *option,
314 size_t option_count)
315 {
316 int i;
317
318 for (i = 0; i < option_count; i++, option++) {
319 struct team_option *del_opt;
320
321 del_opt = __team_find_option(team, option->name);
322 if (del_opt) {
323 __team_option_inst_del_option(team, del_opt);
324 list_del(&del_opt->list);
325 kfree(del_opt);
326 }
327 }
328 }
329
330 static void __team_options_change_check(struct team *team);
331
332 int team_options_register(struct team *team,
333 const struct team_option *option,
334 size_t option_count)
335 {
336 int err;
337
338 err = __team_options_register(team, option, option_count);
339 if (err)
340 return err;
341 __team_options_change_check(team);
342 return 0;
343 }
344 EXPORT_SYMBOL(team_options_register);
345
346 void team_options_unregister(struct team *team,
347 const struct team_option *option,
348 size_t option_count)
349 {
350 __team_options_mark_removed(team, option, option_count);
351 __team_options_change_check(team);
352 __team_options_unregister(team, option, option_count);
353 }
354 EXPORT_SYMBOL(team_options_unregister);
355
356 static int team_option_get(struct team *team,
357 struct team_option_inst *opt_inst,
358 struct team_gsetter_ctx *ctx)
359 {
360 if (!opt_inst->option->getter)
361 return -EOPNOTSUPP;
362 return opt_inst->option->getter(team, ctx);
363 }
364
365 static int team_option_set(struct team *team,
366 struct team_option_inst *opt_inst,
367 struct team_gsetter_ctx *ctx)
368 {
369 if (!opt_inst->option->setter)
370 return -EOPNOTSUPP;
371 return opt_inst->option->setter(team, ctx);
372 }
373
374 void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info)
375 {
376 struct team_option_inst *opt_inst;
377
378 opt_inst = container_of(opt_inst_info, struct team_option_inst, info);
379 opt_inst->changed = true;
380 }
381 EXPORT_SYMBOL(team_option_inst_set_change);
382
383 void team_options_change_check(struct team *team)
384 {
385 __team_options_change_check(team);
386 }
387 EXPORT_SYMBOL(team_options_change_check);
388
389
390 /****************
391 * Mode handling
392 ****************/
393
394 static LIST_HEAD(mode_list);
395 static DEFINE_SPINLOCK(mode_list_lock);
396
397 struct team_mode_item {
398 struct list_head list;
399 const struct team_mode *mode;
400 };
401
402 static struct team_mode_item *__find_mode(const char *kind)
403 {
404 struct team_mode_item *mitem;
405
406 list_for_each_entry(mitem, &mode_list, list) {
407 if (strcmp(mitem->mode->kind, kind) == 0)
408 return mitem;
409 }
410 return NULL;
411 }
412
413 static bool is_good_mode_name(const char *name)
414 {
415 while (*name != '\0') {
416 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
417 return false;
418 name++;
419 }
420 return true;
421 }
422
423 int team_mode_register(const struct team_mode *mode)
424 {
425 int err = 0;
426 struct team_mode_item *mitem;
427
428 if (!is_good_mode_name(mode->kind) ||
429 mode->priv_size > TEAM_MODE_PRIV_SIZE)
430 return -EINVAL;
431
432 mitem = kmalloc(sizeof(*mitem), GFP_KERNEL);
433 if (!mitem)
434 return -ENOMEM;
435
436 spin_lock(&mode_list_lock);
437 if (__find_mode(mode->kind)) {
438 err = -EEXIST;
439 kfree(mitem);
440 goto unlock;
441 }
442 mitem->mode = mode;
443 list_add_tail(&mitem->list, &mode_list);
444 unlock:
445 spin_unlock(&mode_list_lock);
446 return err;
447 }
448 EXPORT_SYMBOL(team_mode_register);
449
450 void team_mode_unregister(const struct team_mode *mode)
451 {
452 struct team_mode_item *mitem;
453
454 spin_lock(&mode_list_lock);
455 mitem = __find_mode(mode->kind);
456 if (mitem) {
457 list_del_init(&mitem->list);
458 kfree(mitem);
459 }
460 spin_unlock(&mode_list_lock);
461 }
462 EXPORT_SYMBOL(team_mode_unregister);
463
464 static const struct team_mode *team_mode_get(const char *kind)
465 {
466 struct team_mode_item *mitem;
467 const struct team_mode *mode = NULL;
468
469 spin_lock(&mode_list_lock);
470 mitem = __find_mode(kind);
471 if (!mitem) {
472 spin_unlock(&mode_list_lock);
473 request_module("team-mode-%s", kind);
474 spin_lock(&mode_list_lock);
475 mitem = __find_mode(kind);
476 }
477 if (mitem) {
478 mode = mitem->mode;
479 if (!try_module_get(mode->owner))
480 mode = NULL;
481 }
482
483 spin_unlock(&mode_list_lock);
484 return mode;
485 }
486
487 static void team_mode_put(const struct team_mode *mode)
488 {
489 module_put(mode->owner);
490 }
491
492 static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
493 {
494 dev_kfree_skb_any(skb);
495 return false;
496 }
497
498 static rx_handler_result_t team_dummy_receive(struct team *team,
499 struct team_port *port,
500 struct sk_buff *skb)
501 {
502 return RX_HANDLER_ANOTHER;
503 }
504
505 static const struct team_mode __team_no_mode = {
506 .kind = "*NOMODE*",
507 };
508
509 static bool team_is_mode_set(struct team *team)
510 {
511 return team->mode != &__team_no_mode;
512 }
513
514 static void team_set_no_mode(struct team *team)
515 {
516 team->user_carrier_enabled = false;
517 team->mode = &__team_no_mode;
518 }
519
520 static void team_adjust_ops(struct team *team)
521 {
522 /*
523 * To avoid checks in rx/tx skb paths, ensure here that non-null and
524 * correct ops are always set.
525 */
526
527 if (!team->en_port_count || !team_is_mode_set(team) ||
528 !team->mode->ops->transmit)
529 team->ops.transmit = team_dummy_transmit;
530 else
531 team->ops.transmit = team->mode->ops->transmit;
532
533 if (!team->en_port_count || !team_is_mode_set(team) ||
534 !team->mode->ops->receive)
535 team->ops.receive = team_dummy_receive;
536 else
537 team->ops.receive = team->mode->ops->receive;
538 }
539
540 /*
541 * We can benefit from the fact that it's ensured no port is present
542 * at the time of mode change. Therefore no packets are in fly so there's no
543 * need to set mode operations in any special way.
544 */
545 static int __team_change_mode(struct team *team,
546 const struct team_mode *new_mode)
547 {
548 /* Check if mode was previously set and do cleanup if so */
549 if (team_is_mode_set(team)) {
550 void (*exit_op)(struct team *team) = team->ops.exit;
551
552 /* Clear ops area so no callback is called any longer */
553 memset(&team->ops, 0, sizeof(struct team_mode_ops));
554 team_adjust_ops(team);
555
556 if (exit_op)
557 exit_op(team);
558 team_mode_put(team->mode);
559 team_set_no_mode(team);
560 /* zero private data area */
561 memset(&team->mode_priv, 0,
562 sizeof(struct team) - offsetof(struct team, mode_priv));
563 }
564
565 if (!new_mode)
566 return 0;
567
568 if (new_mode->ops->init) {
569 int err;
570
571 err = new_mode->ops->init(team);
572 if (err)
573 return err;
574 }
575
576 team->mode = new_mode;
577 memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
578 team_adjust_ops(team);
579
580 return 0;
581 }
582
583 static int team_change_mode(struct team *team, const char *kind)
584 {
585 const struct team_mode *new_mode;
586 struct net_device *dev = team->dev;
587 int err;
588
589 if (!list_empty(&team->port_list)) {
590 netdev_err(dev, "No ports can be present during mode change\n");
591 return -EBUSY;
592 }
593
594 if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) {
595 netdev_err(dev, "Unable to change to the same mode the team is in\n");
596 return -EINVAL;
597 }
598
599 new_mode = team_mode_get(kind);
600 if (!new_mode) {
601 netdev_err(dev, "Mode \"%s\" not found\n", kind);
602 return -EINVAL;
603 }
604
605 err = __team_change_mode(team, new_mode);
606 if (err) {
607 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
608 team_mode_put(new_mode);
609 return err;
610 }
611
612 netdev_info(dev, "Mode changed to \"%s\"\n", kind);
613 return 0;
614 }
615
616
617 /*********************
618 * Peers notification
619 *********************/
620
621 static void team_notify_peers_work(struct work_struct *work)
622 {
623 struct team *team;
624 int val;
625
626 team = container_of(work, struct team, notify_peers.dw.work);
627
628 if (!rtnl_trylock()) {
629 schedule_delayed_work(&team->notify_peers.dw, 0);
630 return;
631 }
632 val = atomic_dec_if_positive(&team->notify_peers.count_pending);
633 if (val < 0) {
634 rtnl_unlock();
635 return;
636 }
637 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, team->dev);
638 rtnl_unlock();
639 if (val)
640 schedule_delayed_work(&team->notify_peers.dw,
641 msecs_to_jiffies(team->notify_peers.interval));
642 }
643
644 static void team_notify_peers(struct team *team)
645 {
646 if (!team->notify_peers.count || !netif_running(team->dev))
647 return;
648 atomic_add(team->notify_peers.count, &team->notify_peers.count_pending);
649 schedule_delayed_work(&team->notify_peers.dw, 0);
650 }
651
652 static void team_notify_peers_init(struct team *team)
653 {
654 INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work);
655 }
656
657 static void team_notify_peers_fini(struct team *team)
658 {
659 cancel_delayed_work_sync(&team->notify_peers.dw);
660 }
661
662
663 /*******************************
664 * Send multicast group rejoins
665 *******************************/
666
667 static void team_mcast_rejoin_work(struct work_struct *work)
668 {
669 struct team *team;
670 int val;
671
672 team = container_of(work, struct team, mcast_rejoin.dw.work);
673
674 if (!rtnl_trylock()) {
675 schedule_delayed_work(&team->mcast_rejoin.dw, 0);
676 return;
677 }
678 val = atomic_dec_if_positive(&team->mcast_rejoin.count_pending);
679 if (val < 0) {
680 rtnl_unlock();
681 return;
682 }
683 call_netdevice_notifiers(NETDEV_RESEND_IGMP, team->dev);
684 rtnl_unlock();
685 if (val)
686 schedule_delayed_work(&team->mcast_rejoin.dw,
687 msecs_to_jiffies(team->mcast_rejoin.interval));
688 }
689
690 static void team_mcast_rejoin(struct team *team)
691 {
692 if (!team->mcast_rejoin.count || !netif_running(team->dev))
693 return;
694 atomic_add(team->mcast_rejoin.count, &team->mcast_rejoin.count_pending);
695 schedule_delayed_work(&team->mcast_rejoin.dw, 0);
696 }
697
698 static void team_mcast_rejoin_init(struct team *team)
699 {
700 INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work);
701 }
702
703 static void team_mcast_rejoin_fini(struct team *team)
704 {
705 cancel_delayed_work_sync(&team->mcast_rejoin.dw);
706 }
707
708
709 /************************
710 * Rx path frame handler
711 ************************/
712
713 /* note: already called with rcu_read_lock */
714 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
715 {
716 struct sk_buff *skb = *pskb;
717 struct team_port *port;
718 struct team *team;
719 rx_handler_result_t res;
720
721 skb = skb_share_check(skb, GFP_ATOMIC);
722 if (!skb)
723 return RX_HANDLER_CONSUMED;
724
725 *pskb = skb;
726
727 port = team_port_get_rcu(skb->dev);
728 team = port->team;
729 if (!team_port_enabled(port)) {
730 /* allow exact match delivery for disabled ports */
731 res = RX_HANDLER_EXACT;
732 } else {
733 res = team->ops.receive(team, port, skb);
734 }
735 if (res == RX_HANDLER_ANOTHER) {
736 struct team_pcpu_stats *pcpu_stats;
737
738 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
739 u64_stats_update_begin(&pcpu_stats->syncp);
740 pcpu_stats->rx_packets++;
741 pcpu_stats->rx_bytes += skb->len;
742 if (skb->pkt_type == PACKET_MULTICAST)
743 pcpu_stats->rx_multicast++;
744 u64_stats_update_end(&pcpu_stats->syncp);
745
746 skb->dev = team->dev;
747 } else {
748 this_cpu_inc(team->pcpu_stats->rx_dropped);
749 }
750
751 return res;
752 }
753
754
755 /*************************************
756 * Multiqueue Tx port select override
757 *************************************/
758
759 static int team_queue_override_init(struct team *team)
760 {
761 struct list_head *listarr;
762 unsigned int queue_cnt = team->dev->num_tx_queues - 1;
763 unsigned int i;
764
765 if (!queue_cnt)
766 return 0;
767 listarr = kmalloc(sizeof(struct list_head) * queue_cnt, GFP_KERNEL);
768 if (!listarr)
769 return -ENOMEM;
770 team->qom_lists = listarr;
771 for (i = 0; i < queue_cnt; i++)
772 INIT_LIST_HEAD(listarr++);
773 return 0;
774 }
775
776 static void team_queue_override_fini(struct team *team)
777 {
778 kfree(team->qom_lists);
779 }
780
781 static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
782 {
783 return &team->qom_lists[queue_id - 1];
784 }
785
786 /*
787 * note: already called with rcu_read_lock
788 */
789 static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
790 {
791 struct list_head *qom_list;
792 struct team_port *port;
793
794 if (!team->queue_override_enabled || !skb->queue_mapping)
795 return false;
796 qom_list = __team_get_qom_list(team, skb->queue_mapping);
797 list_for_each_entry_rcu(port, qom_list, qom_list) {
798 if (!team_dev_queue_xmit(team, port, skb))
799 return true;
800 }
801 return false;
802 }
803
804 static void __team_queue_override_port_del(struct team *team,
805 struct team_port *port)
806 {
807 if (!port->queue_id)
808 return;
809 list_del_rcu(&port->qom_list);
810 }
811
812 static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
813 struct team_port *cur)
814 {
815 if (port->priority < cur->priority)
816 return true;
817 if (port->priority > cur->priority)
818 return false;
819 if (port->index < cur->index)
820 return true;
821 return false;
822 }
823
824 static void __team_queue_override_port_add(struct team *team,
825 struct team_port *port)
826 {
827 struct team_port *cur;
828 struct list_head *qom_list;
829 struct list_head *node;
830
831 if (!port->queue_id)
832 return;
833 qom_list = __team_get_qom_list(team, port->queue_id);
834 node = qom_list;
835 list_for_each_entry(cur, qom_list, qom_list) {
836 if (team_queue_override_port_has_gt_prio_than(port, cur))
837 break;
838 node = &cur->qom_list;
839 }
840 list_add_tail_rcu(&port->qom_list, node);
841 }
842
843 static void __team_queue_override_enabled_check(struct team *team)
844 {
845 struct team_port *port;
846 bool enabled = false;
847
848 list_for_each_entry(port, &team->port_list, list) {
849 if (port->queue_id) {
850 enabled = true;
851 break;
852 }
853 }
854 if (enabled == team->queue_override_enabled)
855 return;
856 netdev_dbg(team->dev, "%s queue override\n",
857 enabled ? "Enabling" : "Disabling");
858 team->queue_override_enabled = enabled;
859 }
860
861 static void team_queue_override_port_prio_changed(struct team *team,
862 struct team_port *port)
863 {
864 if (!port->queue_id || team_port_enabled(port))
865 return;
866 __team_queue_override_port_del(team, port);
867 __team_queue_override_port_add(team, port);
868 __team_queue_override_enabled_check(team);
869 }
870
871 static void team_queue_override_port_change_queue_id(struct team *team,
872 struct team_port *port,
873 u16 new_queue_id)
874 {
875 if (team_port_enabled(port)) {
876 __team_queue_override_port_del(team, port);
877 port->queue_id = new_queue_id;
878 __team_queue_override_port_add(team, port);
879 __team_queue_override_enabled_check(team);
880 } else {
881 port->queue_id = new_queue_id;
882 }
883 }
884
885 static void team_queue_override_port_add(struct team *team,
886 struct team_port *port)
887 {
888 __team_queue_override_port_add(team, port);
889 __team_queue_override_enabled_check(team);
890 }
891
892 static void team_queue_override_port_del(struct team *team,
893 struct team_port *port)
894 {
895 __team_queue_override_port_del(team, port);
896 __team_queue_override_enabled_check(team);
897 }
898
899
900 /****************
901 * Port handling
902 ****************/
903
904 static bool team_port_find(const struct team *team,
905 const struct team_port *port)
906 {
907 struct team_port *cur;
908
909 list_for_each_entry(cur, &team->port_list, list)
910 if (cur == port)
911 return true;
912 return false;
913 }
914
915 /*
916 * Enable/disable port by adding to enabled port hashlist and setting
917 * port->index (Might be racy so reader could see incorrect ifindex when
918 * processing a flying packet, but that is not a problem). Write guarded
919 * by team->lock.
920 */
921 static void team_port_enable(struct team *team,
922 struct team_port *port)
923 {
924 if (team_port_enabled(port))
925 return;
926 port->index = team->en_port_count++;
927 hlist_add_head_rcu(&port->hlist,
928 team_port_index_hash(team, port->index));
929 team_adjust_ops(team);
930 team_queue_override_port_add(team, port);
931 if (team->ops.port_enabled)
932 team->ops.port_enabled(team, port);
933 team_notify_peers(team);
934 team_mcast_rejoin(team);
935 }
936
937 static void __reconstruct_port_hlist(struct team *team, int rm_index)
938 {
939 int i;
940 struct team_port *port;
941
942 for (i = rm_index + 1; i < team->en_port_count; i++) {
943 port = team_get_port_by_index(team, i);
944 hlist_del_rcu(&port->hlist);
945 port->index--;
946 hlist_add_head_rcu(&port->hlist,
947 team_port_index_hash(team, port->index));
948 }
949 }
950
951 static void team_port_disable(struct team *team,
952 struct team_port *port)
953 {
954 if (!team_port_enabled(port))
955 return;
956 if (team->ops.port_disabled)
957 team->ops.port_disabled(team, port);
958 hlist_del_rcu(&port->hlist);
959 __reconstruct_port_hlist(team, port->index);
960 port->index = -1;
961 team->en_port_count--;
962 team_queue_override_port_del(team, port);
963 team_adjust_ops(team);
964 team_notify_peers(team);
965 team_mcast_rejoin(team);
966 }
967
968 #define TEAM_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \
969 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
970 NETIF_F_HIGHDMA | NETIF_F_LRO)
971
972 static void __team_compute_features(struct team *team)
973 {
974 struct team_port *port;
975 u32 vlan_features = TEAM_VLAN_FEATURES & NETIF_F_ALL_FOR_ALL;
976 unsigned short max_hard_header_len = ETH_HLEN;
977 unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE |
978 IFF_XMIT_DST_RELEASE_PERM;
979
980 list_for_each_entry(port, &team->port_list, list) {
981 vlan_features = netdev_increment_features(vlan_features,
982 port->dev->vlan_features,
983 TEAM_VLAN_FEATURES);
984
985 dst_release_flag &= port->dev->priv_flags;
986 if (port->dev->hard_header_len > max_hard_header_len)
987 max_hard_header_len = port->dev->hard_header_len;
988 }
989
990 team->dev->vlan_features = vlan_features;
991 team->dev->hard_header_len = max_hard_header_len;
992
993 team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
994 if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
995 team->dev->priv_flags |= IFF_XMIT_DST_RELEASE;
996
997 netdev_change_features(team->dev);
998 }
999
1000 static void team_compute_features(struct team *team)
1001 {
1002 mutex_lock(&team->lock);
1003 __team_compute_features(team);
1004 mutex_unlock(&team->lock);
1005 }
1006
1007 static int team_port_enter(struct team *team, struct team_port *port)
1008 {
1009 int err = 0;
1010
1011 dev_hold(team->dev);
1012 if (team->ops.port_enter) {
1013 err = team->ops.port_enter(team, port);
1014 if (err) {
1015 netdev_err(team->dev, "Device %s failed to enter team mode\n",
1016 port->dev->name);
1017 goto err_port_enter;
1018 }
1019 }
1020
1021 return 0;
1022
1023 err_port_enter:
1024 dev_put(team->dev);
1025
1026 return err;
1027 }
1028
1029 static void team_port_leave(struct team *team, struct team_port *port)
1030 {
1031 if (team->ops.port_leave)
1032 team->ops.port_leave(team, port);
1033 dev_put(team->dev);
1034 }
1035
1036 #ifdef CONFIG_NET_POLL_CONTROLLER
1037 static int team_port_enable_netpoll(struct team *team, struct team_port *port)
1038 {
1039 struct netpoll *np;
1040 int err;
1041
1042 if (!team->dev->npinfo)
1043 return 0;
1044
1045 np = kzalloc(sizeof(*np), GFP_KERNEL);
1046 if (!np)
1047 return -ENOMEM;
1048
1049 err = __netpoll_setup(np, port->dev);
1050 if (err) {
1051 kfree(np);
1052 return err;
1053 }
1054 port->np = np;
1055 return err;
1056 }
1057
1058 static void team_port_disable_netpoll(struct team_port *port)
1059 {
1060 struct netpoll *np = port->np;
1061
1062 if (!np)
1063 return;
1064 port->np = NULL;
1065
1066 /* Wait for transmitting packets to finish before freeing. */
1067 synchronize_rcu_bh();
1068 __netpoll_cleanup(np);
1069 kfree(np);
1070 }
1071 #else
1072 static int team_port_enable_netpoll(struct team *team, struct team_port *port)
1073 {
1074 return 0;
1075 }
1076 static void team_port_disable_netpoll(struct team_port *port)
1077 {
1078 }
1079 #endif
1080
1081 static int team_upper_dev_link(struct net_device *dev,
1082 struct net_device *port_dev)
1083 {
1084 int err;
1085
1086 err = netdev_master_upper_dev_link(port_dev, dev);
1087 if (err)
1088 return err;
1089 port_dev->priv_flags |= IFF_TEAM_PORT;
1090 return 0;
1091 }
1092
1093 static void team_upper_dev_unlink(struct net_device *dev,
1094 struct net_device *port_dev)
1095 {
1096 netdev_upper_dev_unlink(port_dev, dev);
1097 port_dev->priv_flags &= ~IFF_TEAM_PORT;
1098 }
1099
1100 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1101 static int team_dev_type_check_change(struct net_device *dev,
1102 struct net_device *port_dev);
1103
1104 static int team_port_add(struct team *team, struct net_device *port_dev)
1105 {
1106 struct net_device *dev = team->dev;
1107 struct team_port *port;
1108 char *portname = port_dev->name;
1109 int err;
1110
1111 if (port_dev->flags & IFF_LOOPBACK) {
1112 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1113 portname);
1114 return -EINVAL;
1115 }
1116
1117 if (team_port_exists(port_dev)) {
1118 netdev_err(dev, "Device %s is already a port "
1119 "of a team device\n", portname);
1120 return -EBUSY;
1121 }
1122
1123 if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1124 vlan_uses_dev(dev)) {
1125 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1126 portname);
1127 return -EPERM;
1128 }
1129
1130 err = team_dev_type_check_change(dev, port_dev);
1131 if (err)
1132 return err;
1133
1134 if (port_dev->flags & IFF_UP) {
1135 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1136 portname);
1137 return -EBUSY;
1138 }
1139
1140 port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1141 GFP_KERNEL);
1142 if (!port)
1143 return -ENOMEM;
1144
1145 port->dev = port_dev;
1146 port->team = team;
1147 INIT_LIST_HEAD(&port->qom_list);
1148
1149 port->orig.mtu = port_dev->mtu;
1150 err = dev_set_mtu(port_dev, dev->mtu);
1151 if (err) {
1152 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1153 goto err_set_mtu;
1154 }
1155
1156 memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1157
1158 err = team_port_enter(team, port);
1159 if (err) {
1160 netdev_err(dev, "Device %s failed to enter team mode\n",
1161 portname);
1162 goto err_port_enter;
1163 }
1164
1165 err = dev_open(port_dev);
1166 if (err) {
1167 netdev_dbg(dev, "Device %s opening failed\n",
1168 portname);
1169 goto err_dev_open;
1170 }
1171
1172 err = vlan_vids_add_by_dev(port_dev, dev);
1173 if (err) {
1174 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1175 portname);
1176 goto err_vids_add;
1177 }
1178
1179 err = team_port_enable_netpoll(team, port);
1180 if (err) {
1181 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1182 portname);
1183 goto err_enable_netpoll;
1184 }
1185
1186 if (!(dev->features & NETIF_F_LRO))
1187 dev_disable_lro(port_dev);
1188
1189 err = netdev_rx_handler_register(port_dev, team_handle_frame,
1190 port);
1191 if (err) {
1192 netdev_err(dev, "Device %s failed to register rx_handler\n",
1193 portname);
1194 goto err_handler_register;
1195 }
1196
1197 err = team_upper_dev_link(dev, port_dev);
1198 if (err) {
1199 netdev_err(dev, "Device %s failed to set upper link\n",
1200 portname);
1201 goto err_set_upper_link;
1202 }
1203
1204 err = __team_option_inst_add_port(team, port);
1205 if (err) {
1206 netdev_err(dev, "Device %s failed to add per-port options\n",
1207 portname);
1208 goto err_option_port_add;
1209 }
1210
1211 port->index = -1;
1212 list_add_tail_rcu(&port->list, &team->port_list);
1213 team_port_enable(team, port);
1214 __team_compute_features(team);
1215 __team_port_change_port_added(port, !!netif_carrier_ok(port_dev));
1216 __team_options_change_check(team);
1217
1218 netdev_info(dev, "Port device %s added\n", portname);
1219
1220 return 0;
1221
1222 err_option_port_add:
1223 team_upper_dev_unlink(dev, port_dev);
1224
1225 err_set_upper_link:
1226 netdev_rx_handler_unregister(port_dev);
1227
1228 err_handler_register:
1229 team_port_disable_netpoll(port);
1230
1231 err_enable_netpoll:
1232 vlan_vids_del_by_dev(port_dev, dev);
1233
1234 err_vids_add:
1235 dev_close(port_dev);
1236
1237 err_dev_open:
1238 team_port_leave(team, port);
1239 team_port_set_orig_dev_addr(port);
1240
1241 err_port_enter:
1242 dev_set_mtu(port_dev, port->orig.mtu);
1243
1244 err_set_mtu:
1245 kfree(port);
1246
1247 return err;
1248 }
1249
1250 static void __team_port_change_port_removed(struct team_port *port);
1251
1252 static int team_port_del(struct team *team, struct net_device *port_dev)
1253 {
1254 struct net_device *dev = team->dev;
1255 struct team_port *port;
1256 char *portname = port_dev->name;
1257
1258 port = team_port_get_rtnl(port_dev);
1259 if (!port || !team_port_find(team, port)) {
1260 netdev_err(dev, "Device %s does not act as a port of this team\n",
1261 portname);
1262 return -ENOENT;
1263 }
1264
1265 team_port_disable(team, port);
1266 list_del_rcu(&port->list);
1267 team_upper_dev_unlink(dev, port_dev);
1268 netdev_rx_handler_unregister(port_dev);
1269 team_port_disable_netpoll(port);
1270 vlan_vids_del_by_dev(port_dev, dev);
1271 dev_uc_unsync(port_dev, dev);
1272 dev_mc_unsync(port_dev, dev);
1273 dev_close(port_dev);
1274 team_port_leave(team, port);
1275
1276 __team_option_inst_mark_removed_port(team, port);
1277 __team_options_change_check(team);
1278 __team_option_inst_del_port(team, port);
1279 __team_port_change_port_removed(port);
1280
1281 team_port_set_orig_dev_addr(port);
1282 dev_set_mtu(port_dev, port->orig.mtu);
1283 kfree_rcu(port, rcu);
1284 netdev_info(dev, "Port device %s removed\n", portname);
1285 __team_compute_features(team);
1286
1287 return 0;
1288 }
1289
1290
1291 /*****************
1292 * Net device ops
1293 *****************/
1294
1295 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1296 {
1297 ctx->data.str_val = team->mode->kind;
1298 return 0;
1299 }
1300
1301 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1302 {
1303 return team_change_mode(team, ctx->data.str_val);
1304 }
1305
1306 static int team_notify_peers_count_get(struct team *team,
1307 struct team_gsetter_ctx *ctx)
1308 {
1309 ctx->data.u32_val = team->notify_peers.count;
1310 return 0;
1311 }
1312
1313 static int team_notify_peers_count_set(struct team *team,
1314 struct team_gsetter_ctx *ctx)
1315 {
1316 team->notify_peers.count = ctx->data.u32_val;
1317 return 0;
1318 }
1319
1320 static int team_notify_peers_interval_get(struct team *team,
1321 struct team_gsetter_ctx *ctx)
1322 {
1323 ctx->data.u32_val = team->notify_peers.interval;
1324 return 0;
1325 }
1326
1327 static int team_notify_peers_interval_set(struct team *team,
1328 struct team_gsetter_ctx *ctx)
1329 {
1330 team->notify_peers.interval = ctx->data.u32_val;
1331 return 0;
1332 }
1333
1334 static int team_mcast_rejoin_count_get(struct team *team,
1335 struct team_gsetter_ctx *ctx)
1336 {
1337 ctx->data.u32_val = team->mcast_rejoin.count;
1338 return 0;
1339 }
1340
1341 static int team_mcast_rejoin_count_set(struct team *team,
1342 struct team_gsetter_ctx *ctx)
1343 {
1344 team->mcast_rejoin.count = ctx->data.u32_val;
1345 return 0;
1346 }
1347
1348 static int team_mcast_rejoin_interval_get(struct team *team,
1349 struct team_gsetter_ctx *ctx)
1350 {
1351 ctx->data.u32_val = team->mcast_rejoin.interval;
1352 return 0;
1353 }
1354
1355 static int team_mcast_rejoin_interval_set(struct team *team,
1356 struct team_gsetter_ctx *ctx)
1357 {
1358 team->mcast_rejoin.interval = ctx->data.u32_val;
1359 return 0;
1360 }
1361
1362 static int team_port_en_option_get(struct team *team,
1363 struct team_gsetter_ctx *ctx)
1364 {
1365 struct team_port *port = ctx->info->port;
1366
1367 ctx->data.bool_val = team_port_enabled(port);
1368 return 0;
1369 }
1370
1371 static int team_port_en_option_set(struct team *team,
1372 struct team_gsetter_ctx *ctx)
1373 {
1374 struct team_port *port = ctx->info->port;
1375
1376 if (ctx->data.bool_val)
1377 team_port_enable(team, port);
1378 else
1379 team_port_disable(team, port);
1380 return 0;
1381 }
1382
1383 static int team_user_linkup_option_get(struct team *team,
1384 struct team_gsetter_ctx *ctx)
1385 {
1386 struct team_port *port = ctx->info->port;
1387
1388 ctx->data.bool_val = port->user.linkup;
1389 return 0;
1390 }
1391
1392 static void __team_carrier_check(struct team *team);
1393
1394 static int team_user_linkup_option_set(struct team *team,
1395 struct team_gsetter_ctx *ctx)
1396 {
1397 struct team_port *port = ctx->info->port;
1398
1399 port->user.linkup = ctx->data.bool_val;
1400 team_refresh_port_linkup(port);
1401 __team_carrier_check(port->team);
1402 return 0;
1403 }
1404
1405 static int team_user_linkup_en_option_get(struct team *team,
1406 struct team_gsetter_ctx *ctx)
1407 {
1408 struct team_port *port = ctx->info->port;
1409
1410 ctx->data.bool_val = port->user.linkup_enabled;
1411 return 0;
1412 }
1413
1414 static int team_user_linkup_en_option_set(struct team *team,
1415 struct team_gsetter_ctx *ctx)
1416 {
1417 struct team_port *port = ctx->info->port;
1418
1419 port->user.linkup_enabled = ctx->data.bool_val;
1420 team_refresh_port_linkup(port);
1421 __team_carrier_check(port->team);
1422 return 0;
1423 }
1424
1425 static int team_priority_option_get(struct team *team,
1426 struct team_gsetter_ctx *ctx)
1427 {
1428 struct team_port *port = ctx->info->port;
1429
1430 ctx->data.s32_val = port->priority;
1431 return 0;
1432 }
1433
1434 static int team_priority_option_set(struct team *team,
1435 struct team_gsetter_ctx *ctx)
1436 {
1437 struct team_port *port = ctx->info->port;
1438 s32 priority = ctx->data.s32_val;
1439
1440 if (port->priority == priority)
1441 return 0;
1442 port->priority = priority;
1443 team_queue_override_port_prio_changed(team, port);
1444 return 0;
1445 }
1446
1447 static int team_queue_id_option_get(struct team *team,
1448 struct team_gsetter_ctx *ctx)
1449 {
1450 struct team_port *port = ctx->info->port;
1451
1452 ctx->data.u32_val = port->queue_id;
1453 return 0;
1454 }
1455
1456 static int team_queue_id_option_set(struct team *team,
1457 struct team_gsetter_ctx *ctx)
1458 {
1459 struct team_port *port = ctx->info->port;
1460 u16 new_queue_id = ctx->data.u32_val;
1461
1462 if (port->queue_id == new_queue_id)
1463 return 0;
1464 if (new_queue_id >= team->dev->real_num_tx_queues)
1465 return -EINVAL;
1466 team_queue_override_port_change_queue_id(team, port, new_queue_id);
1467 return 0;
1468 }
1469
1470 static const struct team_option team_options[] = {
1471 {
1472 .name = "mode",
1473 .type = TEAM_OPTION_TYPE_STRING,
1474 .getter = team_mode_option_get,
1475 .setter = team_mode_option_set,
1476 },
1477 {
1478 .name = "notify_peers_count",
1479 .type = TEAM_OPTION_TYPE_U32,
1480 .getter = team_notify_peers_count_get,
1481 .setter = team_notify_peers_count_set,
1482 },
1483 {
1484 .name = "notify_peers_interval",
1485 .type = TEAM_OPTION_TYPE_U32,
1486 .getter = team_notify_peers_interval_get,
1487 .setter = team_notify_peers_interval_set,
1488 },
1489 {
1490 .name = "mcast_rejoin_count",
1491 .type = TEAM_OPTION_TYPE_U32,
1492 .getter = team_mcast_rejoin_count_get,
1493 .setter = team_mcast_rejoin_count_set,
1494 },
1495 {
1496 .name = "mcast_rejoin_interval",
1497 .type = TEAM_OPTION_TYPE_U32,
1498 .getter = team_mcast_rejoin_interval_get,
1499 .setter = team_mcast_rejoin_interval_set,
1500 },
1501 {
1502 .name = "enabled",
1503 .type = TEAM_OPTION_TYPE_BOOL,
1504 .per_port = true,
1505 .getter = team_port_en_option_get,
1506 .setter = team_port_en_option_set,
1507 },
1508 {
1509 .name = "user_linkup",
1510 .type = TEAM_OPTION_TYPE_BOOL,
1511 .per_port = true,
1512 .getter = team_user_linkup_option_get,
1513 .setter = team_user_linkup_option_set,
1514 },
1515 {
1516 .name = "user_linkup_enabled",
1517 .type = TEAM_OPTION_TYPE_BOOL,
1518 .per_port = true,
1519 .getter = team_user_linkup_en_option_get,
1520 .setter = team_user_linkup_en_option_set,
1521 },
1522 {
1523 .name = "priority",
1524 .type = TEAM_OPTION_TYPE_S32,
1525 .per_port = true,
1526 .getter = team_priority_option_get,
1527 .setter = team_priority_option_set,
1528 },
1529 {
1530 .name = "queue_id",
1531 .type = TEAM_OPTION_TYPE_U32,
1532 .per_port = true,
1533 .getter = team_queue_id_option_get,
1534 .setter = team_queue_id_option_set,
1535 },
1536 };
1537
1538 static struct lock_class_key team_netdev_xmit_lock_key;
1539 static struct lock_class_key team_netdev_addr_lock_key;
1540 static struct lock_class_key team_tx_busylock_key;
1541
1542 static void team_set_lockdep_class_one(struct net_device *dev,
1543 struct netdev_queue *txq,
1544 void *unused)
1545 {
1546 lockdep_set_class(&txq->_xmit_lock, &team_netdev_xmit_lock_key);
1547 }
1548
1549 static void team_set_lockdep_class(struct net_device *dev)
1550 {
1551 lockdep_set_class(&dev->addr_list_lock, &team_netdev_addr_lock_key);
1552 netdev_for_each_tx_queue(dev, team_set_lockdep_class_one, NULL);
1553 dev->qdisc_tx_busylock = &team_tx_busylock_key;
1554 }
1555
1556 static int team_init(struct net_device *dev)
1557 {
1558 struct team *team = netdev_priv(dev);
1559 int i;
1560 int err;
1561
1562 team->dev = dev;
1563 mutex_init(&team->lock);
1564 team_set_no_mode(team);
1565
1566 team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1567 if (!team->pcpu_stats)
1568 return -ENOMEM;
1569
1570 for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1571 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1572 INIT_LIST_HEAD(&team->port_list);
1573 err = team_queue_override_init(team);
1574 if (err)
1575 goto err_team_queue_override_init;
1576
1577 team_adjust_ops(team);
1578
1579 INIT_LIST_HEAD(&team->option_list);
1580 INIT_LIST_HEAD(&team->option_inst_list);
1581
1582 team_notify_peers_init(team);
1583 team_mcast_rejoin_init(team);
1584
1585 err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1586 if (err)
1587 goto err_options_register;
1588 netif_carrier_off(dev);
1589
1590 team_set_lockdep_class(dev);
1591
1592 return 0;
1593
1594 err_options_register:
1595 team_mcast_rejoin_fini(team);
1596 team_notify_peers_fini(team);
1597 team_queue_override_fini(team);
1598 err_team_queue_override_init:
1599 free_percpu(team->pcpu_stats);
1600
1601 return err;
1602 }
1603
1604 static void team_uninit(struct net_device *dev)
1605 {
1606 struct team *team = netdev_priv(dev);
1607 struct team_port *port;
1608 struct team_port *tmp;
1609
1610 mutex_lock(&team->lock);
1611 list_for_each_entry_safe(port, tmp, &team->port_list, list)
1612 team_port_del(team, port->dev);
1613
1614 __team_change_mode(team, NULL); /* cleanup */
1615 __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1616 team_mcast_rejoin_fini(team);
1617 team_notify_peers_fini(team);
1618 team_queue_override_fini(team);
1619 mutex_unlock(&team->lock);
1620 }
1621
1622 static void team_destructor(struct net_device *dev)
1623 {
1624 struct team *team = netdev_priv(dev);
1625
1626 free_percpu(team->pcpu_stats);
1627 free_netdev(dev);
1628 }
1629
1630 static int team_open(struct net_device *dev)
1631 {
1632 return 0;
1633 }
1634
1635 static int team_close(struct net_device *dev)
1636 {
1637 return 0;
1638 }
1639
1640 /*
1641 * note: already called with rcu_read_lock
1642 */
1643 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1644 {
1645 struct team *team = netdev_priv(dev);
1646 bool tx_success;
1647 unsigned int len = skb->len;
1648
1649 tx_success = team_queue_override_transmit(team, skb);
1650 if (!tx_success)
1651 tx_success = team->ops.transmit(team, skb);
1652 if (tx_success) {
1653 struct team_pcpu_stats *pcpu_stats;
1654
1655 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1656 u64_stats_update_begin(&pcpu_stats->syncp);
1657 pcpu_stats->tx_packets++;
1658 pcpu_stats->tx_bytes += len;
1659 u64_stats_update_end(&pcpu_stats->syncp);
1660 } else {
1661 this_cpu_inc(team->pcpu_stats->tx_dropped);
1662 }
1663
1664 return NETDEV_TX_OK;
1665 }
1666
1667 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1668 void *accel_priv, select_queue_fallback_t fallback)
1669 {
1670 /*
1671 * This helper function exists to help dev_pick_tx get the correct
1672 * destination queue. Using a helper function skips a call to
1673 * skb_tx_hash and will put the skbs in the queue we expect on their
1674 * way down to the team driver.
1675 */
1676 u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1677
1678 /*
1679 * Save the original txq to restore before passing to the driver
1680 */
1681 qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1682
1683 if (unlikely(txq >= dev->real_num_tx_queues)) {
1684 do {
1685 txq -= dev->real_num_tx_queues;
1686 } while (txq >= dev->real_num_tx_queues);
1687 }
1688 return txq;
1689 }
1690
1691 static void team_change_rx_flags(struct net_device *dev, int change)
1692 {
1693 struct team *team = netdev_priv(dev);
1694 struct team_port *port;
1695 int inc;
1696
1697 rcu_read_lock();
1698 list_for_each_entry_rcu(port, &team->port_list, list) {
1699 if (change & IFF_PROMISC) {
1700 inc = dev->flags & IFF_PROMISC ? 1 : -1;
1701 dev_set_promiscuity(port->dev, inc);
1702 }
1703 if (change & IFF_ALLMULTI) {
1704 inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1705 dev_set_allmulti(port->dev, inc);
1706 }
1707 }
1708 rcu_read_unlock();
1709 }
1710
1711 static void team_set_rx_mode(struct net_device *dev)
1712 {
1713 struct team *team = netdev_priv(dev);
1714 struct team_port *port;
1715
1716 rcu_read_lock();
1717 list_for_each_entry_rcu(port, &team->port_list, list) {
1718 dev_uc_sync_multiple(port->dev, dev);
1719 dev_mc_sync_multiple(port->dev, dev);
1720 }
1721 rcu_read_unlock();
1722 }
1723
1724 static int team_set_mac_address(struct net_device *dev, void *p)
1725 {
1726 struct sockaddr *addr = p;
1727 struct team *team = netdev_priv(dev);
1728 struct team_port *port;
1729
1730 if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1731 return -EADDRNOTAVAIL;
1732 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1733 mutex_lock(&team->lock);
1734 list_for_each_entry(port, &team->port_list, list)
1735 if (team->ops.port_change_dev_addr)
1736 team->ops.port_change_dev_addr(team, port);
1737 mutex_unlock(&team->lock);
1738 return 0;
1739 }
1740
1741 static int team_change_mtu(struct net_device *dev, int new_mtu)
1742 {
1743 struct team *team = netdev_priv(dev);
1744 struct team_port *port;
1745 int err;
1746
1747 /*
1748 * Alhough this is reader, it's guarded by team lock. It's not possible
1749 * to traverse list in reverse under rcu_read_lock
1750 */
1751 mutex_lock(&team->lock);
1752 team->port_mtu_change_allowed = true;
1753 list_for_each_entry(port, &team->port_list, list) {
1754 err = dev_set_mtu(port->dev, new_mtu);
1755 if (err) {
1756 netdev_err(dev, "Device %s failed to change mtu",
1757 port->dev->name);
1758 goto unwind;
1759 }
1760 }
1761 team->port_mtu_change_allowed = false;
1762 mutex_unlock(&team->lock);
1763
1764 dev->mtu = new_mtu;
1765
1766 return 0;
1767
1768 unwind:
1769 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1770 dev_set_mtu(port->dev, dev->mtu);
1771 team->port_mtu_change_allowed = false;
1772 mutex_unlock(&team->lock);
1773
1774 return err;
1775 }
1776
1777 static struct rtnl_link_stats64 *
1778 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1779 {
1780 struct team *team = netdev_priv(dev);
1781 struct team_pcpu_stats *p;
1782 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1783 u32 rx_dropped = 0, tx_dropped = 0;
1784 unsigned int start;
1785 int i;
1786
1787 for_each_possible_cpu(i) {
1788 p = per_cpu_ptr(team->pcpu_stats, i);
1789 do {
1790 start = u64_stats_fetch_begin_irq(&p->syncp);
1791 rx_packets = p->rx_packets;
1792 rx_bytes = p->rx_bytes;
1793 rx_multicast = p->rx_multicast;
1794 tx_packets = p->tx_packets;
1795 tx_bytes = p->tx_bytes;
1796 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
1797
1798 stats->rx_packets += rx_packets;
1799 stats->rx_bytes += rx_bytes;
1800 stats->multicast += rx_multicast;
1801 stats->tx_packets += tx_packets;
1802 stats->tx_bytes += tx_bytes;
1803 /*
1804 * rx_dropped & tx_dropped are u32, updated
1805 * without syncp protection.
1806 */
1807 rx_dropped += p->rx_dropped;
1808 tx_dropped += p->tx_dropped;
1809 }
1810 stats->rx_dropped = rx_dropped;
1811 stats->tx_dropped = tx_dropped;
1812 return stats;
1813 }
1814
1815 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1816 {
1817 struct team *team = netdev_priv(dev);
1818 struct team_port *port;
1819 int err;
1820
1821 /*
1822 * Alhough this is reader, it's guarded by team lock. It's not possible
1823 * to traverse list in reverse under rcu_read_lock
1824 */
1825 mutex_lock(&team->lock);
1826 list_for_each_entry(port, &team->port_list, list) {
1827 err = vlan_vid_add(port->dev, proto, vid);
1828 if (err)
1829 goto unwind;
1830 }
1831 mutex_unlock(&team->lock);
1832
1833 return 0;
1834
1835 unwind:
1836 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1837 vlan_vid_del(port->dev, proto, vid);
1838 mutex_unlock(&team->lock);
1839
1840 return err;
1841 }
1842
1843 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1844 {
1845 struct team *team = netdev_priv(dev);
1846 struct team_port *port;
1847
1848 rcu_read_lock();
1849 list_for_each_entry_rcu(port, &team->port_list, list)
1850 vlan_vid_del(port->dev, proto, vid);
1851 rcu_read_unlock();
1852
1853 return 0;
1854 }
1855
1856 #ifdef CONFIG_NET_POLL_CONTROLLER
1857 static void team_poll_controller(struct net_device *dev)
1858 {
1859 }
1860
1861 static void __team_netpoll_cleanup(struct team *team)
1862 {
1863 struct team_port *port;
1864
1865 list_for_each_entry(port, &team->port_list, list)
1866 team_port_disable_netpoll(port);
1867 }
1868
1869 static void team_netpoll_cleanup(struct net_device *dev)
1870 {
1871 struct team *team = netdev_priv(dev);
1872
1873 mutex_lock(&team->lock);
1874 __team_netpoll_cleanup(team);
1875 mutex_unlock(&team->lock);
1876 }
1877
1878 static int team_netpoll_setup(struct net_device *dev,
1879 struct netpoll_info *npifo)
1880 {
1881 struct team *team = netdev_priv(dev);
1882 struct team_port *port;
1883 int err = 0;
1884
1885 mutex_lock(&team->lock);
1886 list_for_each_entry(port, &team->port_list, list) {
1887 err = team_port_enable_netpoll(team, port);
1888 if (err) {
1889 __team_netpoll_cleanup(team);
1890 break;
1891 }
1892 }
1893 mutex_unlock(&team->lock);
1894 return err;
1895 }
1896 #endif
1897
1898 static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
1899 {
1900 struct team *team = netdev_priv(dev);
1901 int err;
1902
1903 mutex_lock(&team->lock);
1904 err = team_port_add(team, port_dev);
1905 mutex_unlock(&team->lock);
1906 return err;
1907 }
1908
1909 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1910 {
1911 struct team *team = netdev_priv(dev);
1912 int err;
1913
1914 mutex_lock(&team->lock);
1915 err = team_port_del(team, port_dev);
1916 mutex_unlock(&team->lock);
1917 return err;
1918 }
1919
1920 static netdev_features_t team_fix_features(struct net_device *dev,
1921 netdev_features_t features)
1922 {
1923 struct team_port *port;
1924 struct team *team = netdev_priv(dev);
1925 netdev_features_t mask;
1926
1927 mask = features;
1928 features &= ~NETIF_F_ONE_FOR_ALL;
1929 features |= NETIF_F_ALL_FOR_ALL;
1930
1931 rcu_read_lock();
1932 list_for_each_entry_rcu(port, &team->port_list, list) {
1933 features = netdev_increment_features(features,
1934 port->dev->features,
1935 mask);
1936 }
1937 rcu_read_unlock();
1938
1939 features = netdev_add_tso_features(features, mask);
1940
1941 return features;
1942 }
1943
1944 static int team_change_carrier(struct net_device *dev, bool new_carrier)
1945 {
1946 struct team *team = netdev_priv(dev);
1947
1948 team->user_carrier_enabled = true;
1949
1950 if (new_carrier)
1951 netif_carrier_on(dev);
1952 else
1953 netif_carrier_off(dev);
1954 return 0;
1955 }
1956
1957 static const struct net_device_ops team_netdev_ops = {
1958 .ndo_init = team_init,
1959 .ndo_uninit = team_uninit,
1960 .ndo_open = team_open,
1961 .ndo_stop = team_close,
1962 .ndo_start_xmit = team_xmit,
1963 .ndo_select_queue = team_select_queue,
1964 .ndo_change_rx_flags = team_change_rx_flags,
1965 .ndo_set_rx_mode = team_set_rx_mode,
1966 .ndo_set_mac_address = team_set_mac_address,
1967 .ndo_change_mtu = team_change_mtu,
1968 .ndo_get_stats64 = team_get_stats64,
1969 .ndo_vlan_rx_add_vid = team_vlan_rx_add_vid,
1970 .ndo_vlan_rx_kill_vid = team_vlan_rx_kill_vid,
1971 #ifdef CONFIG_NET_POLL_CONTROLLER
1972 .ndo_poll_controller = team_poll_controller,
1973 .ndo_netpoll_setup = team_netpoll_setup,
1974 .ndo_netpoll_cleanup = team_netpoll_cleanup,
1975 #endif
1976 .ndo_add_slave = team_add_slave,
1977 .ndo_del_slave = team_del_slave,
1978 .ndo_fix_features = team_fix_features,
1979 .ndo_change_carrier = team_change_carrier,
1980 .ndo_bridge_setlink = switchdev_port_bridge_setlink,
1981 .ndo_bridge_getlink = switchdev_port_bridge_getlink,
1982 .ndo_bridge_dellink = switchdev_port_bridge_dellink,
1983 .ndo_fdb_add = switchdev_port_fdb_add,
1984 .ndo_fdb_del = switchdev_port_fdb_del,
1985 .ndo_fdb_dump = switchdev_port_fdb_dump,
1986 .ndo_features_check = passthru_features_check,
1987 };
1988
1989 /***********************
1990 * ethtool interface
1991 ***********************/
1992
1993 static void team_ethtool_get_drvinfo(struct net_device *dev,
1994 struct ethtool_drvinfo *drvinfo)
1995 {
1996 strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
1997 strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
1998 }
1999
2000 static const struct ethtool_ops team_ethtool_ops = {
2001 .get_drvinfo = team_ethtool_get_drvinfo,
2002 .get_link = ethtool_op_get_link,
2003 };
2004
2005 /***********************
2006 * rt netlink interface
2007 ***********************/
2008
2009 static void team_setup_by_port(struct net_device *dev,
2010 struct net_device *port_dev)
2011 {
2012 dev->header_ops = port_dev->header_ops;
2013 dev->type = port_dev->type;
2014 dev->hard_header_len = port_dev->hard_header_len;
2015 dev->addr_len = port_dev->addr_len;
2016 dev->mtu = port_dev->mtu;
2017 memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2018 eth_hw_addr_inherit(dev, port_dev);
2019 }
2020
2021 static int team_dev_type_check_change(struct net_device *dev,
2022 struct net_device *port_dev)
2023 {
2024 struct team *team = netdev_priv(dev);
2025 char *portname = port_dev->name;
2026 int err;
2027
2028 if (dev->type == port_dev->type)
2029 return 0;
2030 if (!list_empty(&team->port_list)) {
2031 netdev_err(dev, "Device %s is of different type\n", portname);
2032 return -EBUSY;
2033 }
2034 err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2035 err = notifier_to_errno(err);
2036 if (err) {
2037 netdev_err(dev, "Refused to change device type\n");
2038 return err;
2039 }
2040 dev_uc_flush(dev);
2041 dev_mc_flush(dev);
2042 team_setup_by_port(dev, port_dev);
2043 call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2044 return 0;
2045 }
2046
2047 static void team_setup(struct net_device *dev)
2048 {
2049 ether_setup(dev);
2050
2051 dev->netdev_ops = &team_netdev_ops;
2052 dev->ethtool_ops = &team_ethtool_ops;
2053 dev->destructor = team_destructor;
2054 dev->flags |= IFF_MULTICAST;
2055 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2056 dev->priv_flags |= IFF_NO_QUEUE;
2057
2058 /*
2059 * Indicate we support unicast address filtering. That way core won't
2060 * bring us to promisc mode in case a unicast addr is added.
2061 * Let this up to underlay drivers.
2062 */
2063 dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2064
2065 dev->features |= NETIF_F_LLTX;
2066 dev->features |= NETIF_F_GRO;
2067
2068 /* Don't allow team devices to change network namespaces. */
2069 dev->features |= NETIF_F_NETNS_LOCAL;
2070
2071 dev->hw_features = TEAM_VLAN_FEATURES |
2072 NETIF_F_HW_VLAN_CTAG_TX |
2073 NETIF_F_HW_VLAN_CTAG_RX |
2074 NETIF_F_HW_VLAN_CTAG_FILTER;
2075
2076 dev->hw_features &= ~(NETIF_F_ALL_CSUM & ~NETIF_F_HW_CSUM);
2077 dev->features |= dev->hw_features;
2078 }
2079
2080 static int team_newlink(struct net *src_net, struct net_device *dev,
2081 struct nlattr *tb[], struct nlattr *data[])
2082 {
2083 if (tb[IFLA_ADDRESS] == NULL)
2084 eth_hw_addr_random(dev);
2085
2086 return register_netdevice(dev);
2087 }
2088
2089 static int team_validate(struct nlattr *tb[], struct nlattr *data[])
2090 {
2091 if (tb[IFLA_ADDRESS]) {
2092 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2093 return -EINVAL;
2094 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2095 return -EADDRNOTAVAIL;
2096 }
2097 return 0;
2098 }
2099
2100 static unsigned int team_get_num_tx_queues(void)
2101 {
2102 return TEAM_DEFAULT_NUM_TX_QUEUES;
2103 }
2104
2105 static unsigned int team_get_num_rx_queues(void)
2106 {
2107 return TEAM_DEFAULT_NUM_RX_QUEUES;
2108 }
2109
2110 static struct rtnl_link_ops team_link_ops __read_mostly = {
2111 .kind = DRV_NAME,
2112 .priv_size = sizeof(struct team),
2113 .setup = team_setup,
2114 .newlink = team_newlink,
2115 .validate = team_validate,
2116 .get_num_tx_queues = team_get_num_tx_queues,
2117 .get_num_rx_queues = team_get_num_rx_queues,
2118 };
2119
2120
2121 /***********************************
2122 * Generic netlink custom interface
2123 ***********************************/
2124
2125 static struct genl_family team_nl_family = {
2126 .id = GENL_ID_GENERATE,
2127 .name = TEAM_GENL_NAME,
2128 .version = TEAM_GENL_VERSION,
2129 .maxattr = TEAM_ATTR_MAX,
2130 .netnsok = true,
2131 };
2132
2133 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2134 [TEAM_ATTR_UNSPEC] = { .type = NLA_UNSPEC, },
2135 [TEAM_ATTR_TEAM_IFINDEX] = { .type = NLA_U32 },
2136 [TEAM_ATTR_LIST_OPTION] = { .type = NLA_NESTED },
2137 [TEAM_ATTR_LIST_PORT] = { .type = NLA_NESTED },
2138 };
2139
2140 static const struct nla_policy
2141 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2142 [TEAM_ATTR_OPTION_UNSPEC] = { .type = NLA_UNSPEC, },
2143 [TEAM_ATTR_OPTION_NAME] = {
2144 .type = NLA_STRING,
2145 .len = TEAM_STRING_MAX_LEN,
2146 },
2147 [TEAM_ATTR_OPTION_CHANGED] = { .type = NLA_FLAG },
2148 [TEAM_ATTR_OPTION_TYPE] = { .type = NLA_U8 },
2149 [TEAM_ATTR_OPTION_DATA] = { .type = NLA_BINARY },
2150 };
2151
2152 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2153 {
2154 struct sk_buff *msg;
2155 void *hdr;
2156 int err;
2157
2158 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2159 if (!msg)
2160 return -ENOMEM;
2161
2162 hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2163 &team_nl_family, 0, TEAM_CMD_NOOP);
2164 if (!hdr) {
2165 err = -EMSGSIZE;
2166 goto err_msg_put;
2167 }
2168
2169 genlmsg_end(msg, hdr);
2170
2171 return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2172
2173 err_msg_put:
2174 nlmsg_free(msg);
2175
2176 return err;
2177 }
2178
2179 /*
2180 * Netlink cmd functions should be locked by following two functions.
2181 * Since dev gets held here, that ensures dev won't disappear in between.
2182 */
2183 static struct team *team_nl_team_get(struct genl_info *info)
2184 {
2185 struct net *net = genl_info_net(info);
2186 int ifindex;
2187 struct net_device *dev;
2188 struct team *team;
2189
2190 if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2191 return NULL;
2192
2193 ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2194 dev = dev_get_by_index(net, ifindex);
2195 if (!dev || dev->netdev_ops != &team_netdev_ops) {
2196 if (dev)
2197 dev_put(dev);
2198 return NULL;
2199 }
2200
2201 team = netdev_priv(dev);
2202 mutex_lock(&team->lock);
2203 return team;
2204 }
2205
2206 static void team_nl_team_put(struct team *team)
2207 {
2208 mutex_unlock(&team->lock);
2209 dev_put(team->dev);
2210 }
2211
2212 typedef int team_nl_send_func_t(struct sk_buff *skb,
2213 struct team *team, u32 portid);
2214
2215 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2216 {
2217 return genlmsg_unicast(dev_net(team->dev), skb, portid);
2218 }
2219
2220 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2221 struct team_option_inst *opt_inst)
2222 {
2223 struct nlattr *option_item;
2224 struct team_option *option = opt_inst->option;
2225 struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2226 struct team_gsetter_ctx ctx;
2227 int err;
2228
2229 ctx.info = opt_inst_info;
2230 err = team_option_get(team, opt_inst, &ctx);
2231 if (err)
2232 return err;
2233
2234 option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
2235 if (!option_item)
2236 return -EMSGSIZE;
2237
2238 if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2239 goto nest_cancel;
2240 if (opt_inst_info->port &&
2241 nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2242 opt_inst_info->port->dev->ifindex))
2243 goto nest_cancel;
2244 if (opt_inst->option->array_size &&
2245 nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2246 opt_inst_info->array_index))
2247 goto nest_cancel;
2248
2249 switch (option->type) {
2250 case TEAM_OPTION_TYPE_U32:
2251 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2252 goto nest_cancel;
2253 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2254 goto nest_cancel;
2255 break;
2256 case TEAM_OPTION_TYPE_STRING:
2257 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2258 goto nest_cancel;
2259 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2260 ctx.data.str_val))
2261 goto nest_cancel;
2262 break;
2263 case TEAM_OPTION_TYPE_BINARY:
2264 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2265 goto nest_cancel;
2266 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2267 ctx.data.bin_val.ptr))
2268 goto nest_cancel;
2269 break;
2270 case TEAM_OPTION_TYPE_BOOL:
2271 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2272 goto nest_cancel;
2273 if (ctx.data.bool_val &&
2274 nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2275 goto nest_cancel;
2276 break;
2277 case TEAM_OPTION_TYPE_S32:
2278 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2279 goto nest_cancel;
2280 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2281 goto nest_cancel;
2282 break;
2283 default:
2284 BUG();
2285 }
2286 if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2287 goto nest_cancel;
2288 if (opt_inst->changed) {
2289 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2290 goto nest_cancel;
2291 opt_inst->changed = false;
2292 }
2293 nla_nest_end(skb, option_item);
2294 return 0;
2295
2296 nest_cancel:
2297 nla_nest_cancel(skb, option_item);
2298 return -EMSGSIZE;
2299 }
2300
2301 static int __send_and_alloc_skb(struct sk_buff **pskb,
2302 struct team *team, u32 portid,
2303 team_nl_send_func_t *send_func)
2304 {
2305 int err;
2306
2307 if (*pskb) {
2308 err = send_func(*pskb, team, portid);
2309 if (err)
2310 return err;
2311 }
2312 *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2313 if (!*pskb)
2314 return -ENOMEM;
2315 return 0;
2316 }
2317
2318 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2319 int flags, team_nl_send_func_t *send_func,
2320 struct list_head *sel_opt_inst_list)
2321 {
2322 struct nlattr *option_list;
2323 struct nlmsghdr *nlh;
2324 void *hdr;
2325 struct team_option_inst *opt_inst;
2326 int err;
2327 struct sk_buff *skb = NULL;
2328 bool incomplete;
2329 int i;
2330
2331 opt_inst = list_first_entry(sel_opt_inst_list,
2332 struct team_option_inst, tmp_list);
2333
2334 start_again:
2335 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2336 if (err)
2337 return err;
2338
2339 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2340 TEAM_CMD_OPTIONS_GET);
2341 if (!hdr)
2342 return -EMSGSIZE;
2343
2344 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2345 goto nla_put_failure;
2346 option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2347 if (!option_list)
2348 goto nla_put_failure;
2349
2350 i = 0;
2351 incomplete = false;
2352 list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2353 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2354 if (err) {
2355 if (err == -EMSGSIZE) {
2356 if (!i)
2357 goto errout;
2358 incomplete = true;
2359 break;
2360 }
2361 goto errout;
2362 }
2363 i++;
2364 }
2365
2366 nla_nest_end(skb, option_list);
2367 genlmsg_end(skb, hdr);
2368 if (incomplete)
2369 goto start_again;
2370
2371 send_done:
2372 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2373 if (!nlh) {
2374 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2375 if (err)
2376 goto errout;
2377 goto send_done;
2378 }
2379
2380 return send_func(skb, team, portid);
2381
2382 nla_put_failure:
2383 err = -EMSGSIZE;
2384 errout:
2385 genlmsg_cancel(skb, hdr);
2386 nlmsg_free(skb);
2387 return err;
2388 }
2389
2390 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2391 {
2392 struct team *team;
2393 struct team_option_inst *opt_inst;
2394 int err;
2395 LIST_HEAD(sel_opt_inst_list);
2396
2397 team = team_nl_team_get(info);
2398 if (!team)
2399 return -EINVAL;
2400
2401 list_for_each_entry(opt_inst, &team->option_inst_list, list)
2402 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2403 err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2404 NLM_F_ACK, team_nl_send_unicast,
2405 &sel_opt_inst_list);
2406
2407 team_nl_team_put(team);
2408
2409 return err;
2410 }
2411
2412 static int team_nl_send_event_options_get(struct team *team,
2413 struct list_head *sel_opt_inst_list);
2414
2415 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2416 {
2417 struct team *team;
2418 int err = 0;
2419 int i;
2420 struct nlattr *nl_option;
2421 LIST_HEAD(opt_inst_list);
2422
2423 team = team_nl_team_get(info);
2424 if (!team)
2425 return -EINVAL;
2426
2427 err = -EINVAL;
2428 if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2429 err = -EINVAL;
2430 goto team_put;
2431 }
2432
2433 nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2434 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2435 struct nlattr *attr;
2436 struct nlattr *attr_data;
2437 enum team_option_type opt_type;
2438 int opt_port_ifindex = 0; /* != 0 for per-port options */
2439 u32 opt_array_index = 0;
2440 bool opt_is_array = false;
2441 struct team_option_inst *opt_inst;
2442 char *opt_name;
2443 bool opt_found = false;
2444
2445 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2446 err = -EINVAL;
2447 goto team_put;
2448 }
2449 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2450 nl_option, team_nl_option_policy);
2451 if (err)
2452 goto team_put;
2453 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2454 !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2455 err = -EINVAL;
2456 goto team_put;
2457 }
2458 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2459 case NLA_U32:
2460 opt_type = TEAM_OPTION_TYPE_U32;
2461 break;
2462 case NLA_STRING:
2463 opt_type = TEAM_OPTION_TYPE_STRING;
2464 break;
2465 case NLA_BINARY:
2466 opt_type = TEAM_OPTION_TYPE_BINARY;
2467 break;
2468 case NLA_FLAG:
2469 opt_type = TEAM_OPTION_TYPE_BOOL;
2470 break;
2471 case NLA_S32:
2472 opt_type = TEAM_OPTION_TYPE_S32;
2473 break;
2474 default:
2475 goto team_put;
2476 }
2477
2478 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2479 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2480 err = -EINVAL;
2481 goto team_put;
2482 }
2483
2484 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2485 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2486 if (attr)
2487 opt_port_ifindex = nla_get_u32(attr);
2488
2489 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2490 if (attr) {
2491 opt_is_array = true;
2492 opt_array_index = nla_get_u32(attr);
2493 }
2494
2495 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2496 struct team_option *option = opt_inst->option;
2497 struct team_gsetter_ctx ctx;
2498 struct team_option_inst_info *opt_inst_info;
2499 int tmp_ifindex;
2500
2501 opt_inst_info = &opt_inst->info;
2502 tmp_ifindex = opt_inst_info->port ?
2503 opt_inst_info->port->dev->ifindex : 0;
2504 if (option->type != opt_type ||
2505 strcmp(option->name, opt_name) ||
2506 tmp_ifindex != opt_port_ifindex ||
2507 (option->array_size && !opt_is_array) ||
2508 opt_inst_info->array_index != opt_array_index)
2509 continue;
2510 opt_found = true;
2511 ctx.info = opt_inst_info;
2512 switch (opt_type) {
2513 case TEAM_OPTION_TYPE_U32:
2514 ctx.data.u32_val = nla_get_u32(attr_data);
2515 break;
2516 case TEAM_OPTION_TYPE_STRING:
2517 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2518 err = -EINVAL;
2519 goto team_put;
2520 }
2521 ctx.data.str_val = nla_data(attr_data);
2522 break;
2523 case TEAM_OPTION_TYPE_BINARY:
2524 ctx.data.bin_val.len = nla_len(attr_data);
2525 ctx.data.bin_val.ptr = nla_data(attr_data);
2526 break;
2527 case TEAM_OPTION_TYPE_BOOL:
2528 ctx.data.bool_val = attr_data ? true : false;
2529 break;
2530 case TEAM_OPTION_TYPE_S32:
2531 ctx.data.s32_val = nla_get_s32(attr_data);
2532 break;
2533 default:
2534 BUG();
2535 }
2536 err = team_option_set(team, opt_inst, &ctx);
2537 if (err)
2538 goto team_put;
2539 opt_inst->changed = true;
2540 list_add(&opt_inst->tmp_list, &opt_inst_list);
2541 }
2542 if (!opt_found) {
2543 err = -ENOENT;
2544 goto team_put;
2545 }
2546 }
2547
2548 err = team_nl_send_event_options_get(team, &opt_inst_list);
2549
2550 team_put:
2551 team_nl_team_put(team);
2552
2553 return err;
2554 }
2555
2556 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2557 struct team_port *port)
2558 {
2559 struct nlattr *port_item;
2560
2561 port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2562 if (!port_item)
2563 goto nest_cancel;
2564 if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2565 goto nest_cancel;
2566 if (port->changed) {
2567 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2568 goto nest_cancel;
2569 port->changed = false;
2570 }
2571 if ((port->removed &&
2572 nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2573 (port->state.linkup &&
2574 nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2575 nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2576 nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2577 goto nest_cancel;
2578 nla_nest_end(skb, port_item);
2579 return 0;
2580
2581 nest_cancel:
2582 nla_nest_cancel(skb, port_item);
2583 return -EMSGSIZE;
2584 }
2585
2586 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2587 int flags, team_nl_send_func_t *send_func,
2588 struct team_port *one_port)
2589 {
2590 struct nlattr *port_list;
2591 struct nlmsghdr *nlh;
2592 void *hdr;
2593 struct team_port *port;
2594 int err;
2595 struct sk_buff *skb = NULL;
2596 bool incomplete;
2597 int i;
2598
2599 port = list_first_entry_or_null(&team->port_list,
2600 struct team_port, list);
2601
2602 start_again:
2603 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2604 if (err)
2605 return err;
2606
2607 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2608 TEAM_CMD_PORT_LIST_GET);
2609 if (!hdr)
2610 return -EMSGSIZE;
2611
2612 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2613 goto nla_put_failure;
2614 port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2615 if (!port_list)
2616 goto nla_put_failure;
2617
2618 i = 0;
2619 incomplete = false;
2620
2621 /* If one port is selected, called wants to send port list containing
2622 * only this port. Otherwise go through all listed ports and send all
2623 */
2624 if (one_port) {
2625 err = team_nl_fill_one_port_get(skb, one_port);
2626 if (err)
2627 goto errout;
2628 } else if (port) {
2629 list_for_each_entry_from(port, &team->port_list, list) {
2630 err = team_nl_fill_one_port_get(skb, port);
2631 if (err) {
2632 if (err == -EMSGSIZE) {
2633 if (!i)
2634 goto errout;
2635 incomplete = true;
2636 break;
2637 }
2638 goto errout;
2639 }
2640 i++;
2641 }
2642 }
2643
2644 nla_nest_end(skb, port_list);
2645 genlmsg_end(skb, hdr);
2646 if (incomplete)
2647 goto start_again;
2648
2649 send_done:
2650 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2651 if (!nlh) {
2652 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2653 if (err)
2654 goto errout;
2655 goto send_done;
2656 }
2657
2658 return send_func(skb, team, portid);
2659
2660 nla_put_failure:
2661 err = -EMSGSIZE;
2662 errout:
2663 genlmsg_cancel(skb, hdr);
2664 nlmsg_free(skb);
2665 return err;
2666 }
2667
2668 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2669 struct genl_info *info)
2670 {
2671 struct team *team;
2672 int err;
2673
2674 team = team_nl_team_get(info);
2675 if (!team)
2676 return -EINVAL;
2677
2678 err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2679 NLM_F_ACK, team_nl_send_unicast, NULL);
2680
2681 team_nl_team_put(team);
2682
2683 return err;
2684 }
2685
2686 static const struct genl_ops team_nl_ops[] = {
2687 {
2688 .cmd = TEAM_CMD_NOOP,
2689 .doit = team_nl_cmd_noop,
2690 .policy = team_nl_policy,
2691 },
2692 {
2693 .cmd = TEAM_CMD_OPTIONS_SET,
2694 .doit = team_nl_cmd_options_set,
2695 .policy = team_nl_policy,
2696 .flags = GENL_ADMIN_PERM,
2697 },
2698 {
2699 .cmd = TEAM_CMD_OPTIONS_GET,
2700 .doit = team_nl_cmd_options_get,
2701 .policy = team_nl_policy,
2702 .flags = GENL_ADMIN_PERM,
2703 },
2704 {
2705 .cmd = TEAM_CMD_PORT_LIST_GET,
2706 .doit = team_nl_cmd_port_list_get,
2707 .policy = team_nl_policy,
2708 .flags = GENL_ADMIN_PERM,
2709 },
2710 };
2711
2712 static const struct genl_multicast_group team_nl_mcgrps[] = {
2713 { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2714 };
2715
2716 static int team_nl_send_multicast(struct sk_buff *skb,
2717 struct team *team, u32 portid)
2718 {
2719 return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2720 skb, 0, 0, GFP_KERNEL);
2721 }
2722
2723 static int team_nl_send_event_options_get(struct team *team,
2724 struct list_head *sel_opt_inst_list)
2725 {
2726 return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2727 sel_opt_inst_list);
2728 }
2729
2730 static int team_nl_send_event_port_get(struct team *team,
2731 struct team_port *port)
2732 {
2733 return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2734 port);
2735 }
2736
2737 static int team_nl_init(void)
2738 {
2739 return genl_register_family_with_ops_groups(&team_nl_family, team_nl_ops,
2740 team_nl_mcgrps);
2741 }
2742
2743 static void team_nl_fini(void)
2744 {
2745 genl_unregister_family(&team_nl_family);
2746 }
2747
2748
2749 /******************
2750 * Change checkers
2751 ******************/
2752
2753 static void __team_options_change_check(struct team *team)
2754 {
2755 int err;
2756 struct team_option_inst *opt_inst;
2757 LIST_HEAD(sel_opt_inst_list);
2758
2759 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2760 if (opt_inst->changed)
2761 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2762 }
2763 err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2764 if (err && err != -ESRCH)
2765 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2766 err);
2767 }
2768
2769 /* rtnl lock is held */
2770
2771 static void __team_port_change_send(struct team_port *port, bool linkup)
2772 {
2773 int err;
2774
2775 port->changed = true;
2776 port->state.linkup = linkup;
2777 team_refresh_port_linkup(port);
2778 if (linkup) {
2779 struct ethtool_cmd ecmd;
2780
2781 err = __ethtool_get_settings(port->dev, &ecmd);
2782 if (!err) {
2783 port->state.speed = ethtool_cmd_speed(&ecmd);
2784 port->state.duplex = ecmd.duplex;
2785 goto send_event;
2786 }
2787 }
2788 port->state.speed = 0;
2789 port->state.duplex = 0;
2790
2791 send_event:
2792 err = team_nl_send_event_port_get(port->team, port);
2793 if (err && err != -ESRCH)
2794 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2795 port->dev->name, err);
2796
2797 }
2798
2799 static void __team_carrier_check(struct team *team)
2800 {
2801 struct team_port *port;
2802 bool team_linkup;
2803
2804 if (team->user_carrier_enabled)
2805 return;
2806
2807 team_linkup = false;
2808 list_for_each_entry(port, &team->port_list, list) {
2809 if (port->linkup) {
2810 team_linkup = true;
2811 break;
2812 }
2813 }
2814
2815 if (team_linkup)
2816 netif_carrier_on(team->dev);
2817 else
2818 netif_carrier_off(team->dev);
2819 }
2820
2821 static void __team_port_change_check(struct team_port *port, bool linkup)
2822 {
2823 if (port->state.linkup != linkup)
2824 __team_port_change_send(port, linkup);
2825 __team_carrier_check(port->team);
2826 }
2827
2828 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2829 {
2830 __team_port_change_send(port, linkup);
2831 __team_carrier_check(port->team);
2832 }
2833
2834 static void __team_port_change_port_removed(struct team_port *port)
2835 {
2836 port->removed = true;
2837 __team_port_change_send(port, false);
2838 __team_carrier_check(port->team);
2839 }
2840
2841 static void team_port_change_check(struct team_port *port, bool linkup)
2842 {
2843 struct team *team = port->team;
2844
2845 mutex_lock(&team->lock);
2846 __team_port_change_check(port, linkup);
2847 mutex_unlock(&team->lock);
2848 }
2849
2850
2851 /************************************
2852 * Net device notifier event handler
2853 ************************************/
2854
2855 static int team_device_event(struct notifier_block *unused,
2856 unsigned long event, void *ptr)
2857 {
2858 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2859 struct team_port *port;
2860
2861 port = team_port_get_rtnl(dev);
2862 if (!port)
2863 return NOTIFY_DONE;
2864
2865 switch (event) {
2866 case NETDEV_UP:
2867 if (netif_carrier_ok(dev))
2868 team_port_change_check(port, true);
2869 break;
2870 case NETDEV_DOWN:
2871 team_port_change_check(port, false);
2872 break;
2873 case NETDEV_CHANGE:
2874 if (netif_running(port->dev))
2875 team_port_change_check(port,
2876 !!netif_carrier_ok(port->dev));
2877 break;
2878 case NETDEV_UNREGISTER:
2879 team_del_slave(port->team->dev, dev);
2880 break;
2881 case NETDEV_FEAT_CHANGE:
2882 team_compute_features(port->team);
2883 break;
2884 case NETDEV_PRECHANGEMTU:
2885 /* Forbid to change mtu of underlaying device */
2886 if (!port->team->port_mtu_change_allowed)
2887 return NOTIFY_BAD;
2888 break;
2889 case NETDEV_PRE_TYPE_CHANGE:
2890 /* Forbid to change type of underlaying device */
2891 return NOTIFY_BAD;
2892 case NETDEV_RESEND_IGMP:
2893 /* Propagate to master device */
2894 call_netdevice_notifiers(event, port->team->dev);
2895 break;
2896 }
2897 return NOTIFY_DONE;
2898 }
2899
2900 static struct notifier_block team_notifier_block __read_mostly = {
2901 .notifier_call = team_device_event,
2902 };
2903
2904
2905 /***********************
2906 * Module init and exit
2907 ***********************/
2908
2909 static int __init team_module_init(void)
2910 {
2911 int err;
2912
2913 register_netdevice_notifier(&team_notifier_block);
2914
2915 err = rtnl_link_register(&team_link_ops);
2916 if (err)
2917 goto err_rtnl_reg;
2918
2919 err = team_nl_init();
2920 if (err)
2921 goto err_nl_init;
2922
2923 return 0;
2924
2925 err_nl_init:
2926 rtnl_link_unregister(&team_link_ops);
2927
2928 err_rtnl_reg:
2929 unregister_netdevice_notifier(&team_notifier_block);
2930
2931 return err;
2932 }
2933
2934 static void __exit team_module_exit(void)
2935 {
2936 team_nl_fini();
2937 rtnl_link_unregister(&team_link_ops);
2938 unregister_netdevice_notifier(&team_notifier_block);
2939 }
2940
2941 module_init(team_module_init);
2942 module_exit(team_module_exit);
2943
2944 MODULE_LICENSE("GPL v2");
2945 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
2946 MODULE_DESCRIPTION("Ethernet team device driver");
2947 MODULE_ALIAS_RTNL_LINK(DRV_NAME);
Linux with added FPC-III support