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Merge branch 'akpm' (Andrew's patch-bomb)
[deliverable/linux.git] / drivers / net / team / team.c
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 <linux/if_team.h>
32
33 #define DRV_NAME "team"
34
35
36 /**********
37 * Helpers
38 **********/
39
40 #define team_port_exists(dev) (dev->priv_flags & IFF_TEAM_PORT)
41
42 static struct team_port *team_port_get_rcu(const struct net_device *dev)
43 {
44 struct team_port *port = rcu_dereference(dev->rx_handler_data);
45
46 return team_port_exists(dev) ? port : NULL;
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 mac 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_mac(struct net_device *port_dev,
61 const unsigned char *dev_addr)
62 {
63 struct sockaddr addr;
64
65 memcpy(addr.sa_data, dev_addr, ETH_ALEN);
66 addr.sa_family = ARPHRD_ETHER;
67 return dev_set_mac_address(port_dev, &addr);
68 }
69
70 static int team_port_set_orig_mac(struct team_port *port)
71 {
72 return __set_port_mac(port->dev, port->orig.dev_addr);
73 }
74
75 int team_port_set_team_mac(struct team_port *port)
76 {
77 return __set_port_mac(port->dev, port->team->dev->dev_addr);
78 }
79 EXPORT_SYMBOL(team_port_set_team_mac);
80
81 static void team_refresh_port_linkup(struct team_port *port)
82 {
83 port->linkup = port->user.linkup_enabled ? port->user.linkup :
84 port->state.linkup;
85 }
86
87
88 /*******************
89 * Options handling
90 *******************/
91
92 struct team_option_inst { /* One for each option instance */
93 struct list_head list;
94 struct list_head tmp_list;
95 struct team_option *option;
96 struct team_option_inst_info info;
97 bool changed;
98 bool removed;
99 };
100
101 static struct team_option *__team_find_option(struct team *team,
102 const char *opt_name)
103 {
104 struct team_option *option;
105
106 list_for_each_entry(option, &team->option_list, list) {
107 if (strcmp(option->name, opt_name) == 0)
108 return option;
109 }
110 return NULL;
111 }
112
113 static void __team_option_inst_del(struct team_option_inst *opt_inst)
114 {
115 list_del(&opt_inst->list);
116 kfree(opt_inst);
117 }
118
119 static void __team_option_inst_del_option(struct team *team,
120 struct team_option *option)
121 {
122 struct team_option_inst *opt_inst, *tmp;
123
124 list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
125 if (opt_inst->option == option)
126 __team_option_inst_del(opt_inst);
127 }
128 }
129
130 static int __team_option_inst_add(struct team *team, struct team_option *option,
131 struct team_port *port)
132 {
133 struct team_option_inst *opt_inst;
134 unsigned int array_size;
135 unsigned int i;
136 int err;
137
138 array_size = option->array_size;
139 if (!array_size)
140 array_size = 1; /* No array but still need one instance */
141
142 for (i = 0; i < array_size; i++) {
143 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL);
144 if (!opt_inst)
145 return -ENOMEM;
146 opt_inst->option = option;
147 opt_inst->info.port = port;
148 opt_inst->info.array_index = i;
149 opt_inst->changed = true;
150 opt_inst->removed = false;
151 list_add_tail(&opt_inst->list, &team->option_inst_list);
152 if (option->init) {
153 err = option->init(team, &opt_inst->info);
154 if (err)
155 return err;
156 }
157
158 }
159 return 0;
160 }
161
162 static int __team_option_inst_add_option(struct team *team,
163 struct team_option *option)
164 {
165 struct team_port *port;
166 int err;
167
168 if (!option->per_port) {
169 err = __team_option_inst_add(team, option, NULL);
170 if (err)
171 goto inst_del_option;
172 }
173
174 list_for_each_entry(port, &team->port_list, list) {
175 err = __team_option_inst_add(team, option, port);
176 if (err)
177 goto inst_del_option;
178 }
179 return 0;
180
181 inst_del_option:
182 __team_option_inst_del_option(team, option);
183 return err;
184 }
185
186 static void __team_option_inst_mark_removed_option(struct team *team,
187 struct team_option *option)
188 {
189 struct team_option_inst *opt_inst;
190
191 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
192 if (opt_inst->option == option) {
193 opt_inst->changed = true;
194 opt_inst->removed = true;
195 }
196 }
197 }
198
199 static void __team_option_inst_del_port(struct team *team,
200 struct team_port *port)
201 {
202 struct team_option_inst *opt_inst, *tmp;
203
204 list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
205 if (opt_inst->option->per_port &&
206 opt_inst->info.port == port)
207 __team_option_inst_del(opt_inst);
208 }
209 }
210
211 static int __team_option_inst_add_port(struct team *team,
212 struct team_port *port)
213 {
214 struct team_option *option;
215 int err;
216
217 list_for_each_entry(option, &team->option_list, list) {
218 if (!option->per_port)
219 continue;
220 err = __team_option_inst_add(team, option, port);
221 if (err)
222 goto inst_del_port;
223 }
224 return 0;
225
226 inst_del_port:
227 __team_option_inst_del_port(team, port);
228 return err;
229 }
230
231 static void __team_option_inst_mark_removed_port(struct team *team,
232 struct team_port *port)
233 {
234 struct team_option_inst *opt_inst;
235
236 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
237 if (opt_inst->info.port == port) {
238 opt_inst->changed = true;
239 opt_inst->removed = true;
240 }
241 }
242 }
243
244 static int __team_options_register(struct team *team,
245 const struct team_option *option,
246 size_t option_count)
247 {
248 int i;
249 struct team_option **dst_opts;
250 int err;
251
252 dst_opts = kzalloc(sizeof(struct team_option *) * option_count,
253 GFP_KERNEL);
254 if (!dst_opts)
255 return -ENOMEM;
256 for (i = 0; i < option_count; i++, option++) {
257 if (__team_find_option(team, option->name)) {
258 err = -EEXIST;
259 goto alloc_rollback;
260 }
261 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
262 if (!dst_opts[i]) {
263 err = -ENOMEM;
264 goto alloc_rollback;
265 }
266 }
267
268 for (i = 0; i < option_count; i++) {
269 err = __team_option_inst_add_option(team, dst_opts[i]);
270 if (err)
271 goto inst_rollback;
272 list_add_tail(&dst_opts[i]->list, &team->option_list);
273 }
274
275 kfree(dst_opts);
276 return 0;
277
278 inst_rollback:
279 for (i--; i >= 0; i--)
280 __team_option_inst_del_option(team, dst_opts[i]);
281
282 i = option_count - 1;
283 alloc_rollback:
284 for (i--; i >= 0; i--)
285 kfree(dst_opts[i]);
286
287 kfree(dst_opts);
288 return err;
289 }
290
291 static void __team_options_mark_removed(struct team *team,
292 const struct team_option *option,
293 size_t option_count)
294 {
295 int i;
296
297 for (i = 0; i < option_count; i++, option++) {
298 struct team_option *del_opt;
299
300 del_opt = __team_find_option(team, option->name);
301 if (del_opt)
302 __team_option_inst_mark_removed_option(team, del_opt);
303 }
304 }
305
306 static void __team_options_unregister(struct team *team,
307 const struct team_option *option,
308 size_t option_count)
309 {
310 int i;
311
312 for (i = 0; i < option_count; i++, option++) {
313 struct team_option *del_opt;
314
315 del_opt = __team_find_option(team, option->name);
316 if (del_opt) {
317 __team_option_inst_del_option(team, del_opt);
318 list_del(&del_opt->list);
319 kfree(del_opt);
320 }
321 }
322 }
323
324 static void __team_options_change_check(struct team *team);
325
326 int team_options_register(struct team *team,
327 const struct team_option *option,
328 size_t option_count)
329 {
330 int err;
331
332 err = __team_options_register(team, option, option_count);
333 if (err)
334 return err;
335 __team_options_change_check(team);
336 return 0;
337 }
338 EXPORT_SYMBOL(team_options_register);
339
340 void team_options_unregister(struct team *team,
341 const struct team_option *option,
342 size_t option_count)
343 {
344 __team_options_mark_removed(team, option, option_count);
345 __team_options_change_check(team);
346 __team_options_unregister(team, option, option_count);
347 }
348 EXPORT_SYMBOL(team_options_unregister);
349
350 static int team_option_get(struct team *team,
351 struct team_option_inst *opt_inst,
352 struct team_gsetter_ctx *ctx)
353 {
354 if (!opt_inst->option->getter)
355 return -EOPNOTSUPP;
356 return opt_inst->option->getter(team, ctx);
357 }
358
359 static int team_option_set(struct team *team,
360 struct team_option_inst *opt_inst,
361 struct team_gsetter_ctx *ctx)
362 {
363 if (!opt_inst->option->setter)
364 return -EOPNOTSUPP;
365 return opt_inst->option->setter(team, ctx);
366 }
367
368 void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info)
369 {
370 struct team_option_inst *opt_inst;
371
372 opt_inst = container_of(opt_inst_info, struct team_option_inst, info);
373 opt_inst->changed = true;
374 }
375 EXPORT_SYMBOL(team_option_inst_set_change);
376
377 void team_options_change_check(struct team *team)
378 {
379 __team_options_change_check(team);
380 }
381 EXPORT_SYMBOL(team_options_change_check);
382
383
384 /****************
385 * Mode handling
386 ****************/
387
388 static LIST_HEAD(mode_list);
389 static DEFINE_SPINLOCK(mode_list_lock);
390
391 struct team_mode_item {
392 struct list_head list;
393 const struct team_mode *mode;
394 };
395
396 static struct team_mode_item *__find_mode(const char *kind)
397 {
398 struct team_mode_item *mitem;
399
400 list_for_each_entry(mitem, &mode_list, list) {
401 if (strcmp(mitem->mode->kind, kind) == 0)
402 return mitem;
403 }
404 return NULL;
405 }
406
407 static bool is_good_mode_name(const char *name)
408 {
409 while (*name != '\0') {
410 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
411 return false;
412 name++;
413 }
414 return true;
415 }
416
417 int team_mode_register(const struct team_mode *mode)
418 {
419 int err = 0;
420 struct team_mode_item *mitem;
421
422 if (!is_good_mode_name(mode->kind) ||
423 mode->priv_size > TEAM_MODE_PRIV_SIZE)
424 return -EINVAL;
425
426 mitem = kmalloc(sizeof(*mitem), GFP_KERNEL);
427 if (!mitem)
428 return -ENOMEM;
429
430 spin_lock(&mode_list_lock);
431 if (__find_mode(mode->kind)) {
432 err = -EEXIST;
433 kfree(mitem);
434 goto unlock;
435 }
436 mitem->mode = mode;
437 list_add_tail(&mitem->list, &mode_list);
438 unlock:
439 spin_unlock(&mode_list_lock);
440 return err;
441 }
442 EXPORT_SYMBOL(team_mode_register);
443
444 void team_mode_unregister(const struct team_mode *mode)
445 {
446 struct team_mode_item *mitem;
447
448 spin_lock(&mode_list_lock);
449 mitem = __find_mode(mode->kind);
450 if (mitem) {
451 list_del_init(&mitem->list);
452 kfree(mitem);
453 }
454 spin_unlock(&mode_list_lock);
455 }
456 EXPORT_SYMBOL(team_mode_unregister);
457
458 static const struct team_mode *team_mode_get(const char *kind)
459 {
460 struct team_mode_item *mitem;
461 const struct team_mode *mode = NULL;
462
463 spin_lock(&mode_list_lock);
464 mitem = __find_mode(kind);
465 if (!mitem) {
466 spin_unlock(&mode_list_lock);
467 request_module("team-mode-%s", kind);
468 spin_lock(&mode_list_lock);
469 mitem = __find_mode(kind);
470 }
471 if (mitem) {
472 mode = mitem->mode;
473 if (!try_module_get(mode->owner))
474 mode = NULL;
475 }
476
477 spin_unlock(&mode_list_lock);
478 return mode;
479 }
480
481 static void team_mode_put(const struct team_mode *mode)
482 {
483 module_put(mode->owner);
484 }
485
486 static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
487 {
488 dev_kfree_skb_any(skb);
489 return false;
490 }
491
492 rx_handler_result_t team_dummy_receive(struct team *team,
493 struct team_port *port,
494 struct sk_buff *skb)
495 {
496 return RX_HANDLER_ANOTHER;
497 }
498
499 static const struct team_mode __team_no_mode = {
500 .kind = "*NOMODE*",
501 };
502
503 static bool team_is_mode_set(struct team *team)
504 {
505 return team->mode != &__team_no_mode;
506 }
507
508 static void team_set_no_mode(struct team *team)
509 {
510 team->mode = &__team_no_mode;
511 }
512
513 static void __team_adjust_ops(struct team *team, int en_port_count)
514 {
515 /*
516 * To avoid checks in rx/tx skb paths, ensure here that non-null and
517 * correct ops are always set.
518 */
519
520 if (!en_port_count || !team_is_mode_set(team) ||
521 !team->mode->ops->transmit)
522 team->ops.transmit = team_dummy_transmit;
523 else
524 team->ops.transmit = team->mode->ops->transmit;
525
526 if (!en_port_count || !team_is_mode_set(team) ||
527 !team->mode->ops->receive)
528 team->ops.receive = team_dummy_receive;
529 else
530 team->ops.receive = team->mode->ops->receive;
531 }
532
533 static void team_adjust_ops(struct team *team)
534 {
535 __team_adjust_ops(team, team->en_port_count);
536 }
537
538 /*
539 * We can benefit from the fact that it's ensured no port is present
540 * at the time of mode change. Therefore no packets are in fly so there's no
541 * need to set mode operations in any special way.
542 */
543 static int __team_change_mode(struct team *team,
544 const struct team_mode *new_mode)
545 {
546 /* Check if mode was previously set and do cleanup if so */
547 if (team_is_mode_set(team)) {
548 void (*exit_op)(struct team *team) = team->ops.exit;
549
550 /* Clear ops area so no callback is called any longer */
551 memset(&team->ops, 0, sizeof(struct team_mode_ops));
552 team_adjust_ops(team);
553
554 if (exit_op)
555 exit_op(team);
556 team_mode_put(team->mode);
557 team_set_no_mode(team);
558 /* zero private data area */
559 memset(&team->mode_priv, 0,
560 sizeof(struct team) - offsetof(struct team, mode_priv));
561 }
562
563 if (!new_mode)
564 return 0;
565
566 if (new_mode->ops->init) {
567 int err;
568
569 err = new_mode->ops->init(team);
570 if (err)
571 return err;
572 }
573
574 team->mode = new_mode;
575 memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
576 team_adjust_ops(team);
577
578 return 0;
579 }
580
581 static int team_change_mode(struct team *team, const char *kind)
582 {
583 const struct team_mode *new_mode;
584 struct net_device *dev = team->dev;
585 int err;
586
587 if (!list_empty(&team->port_list)) {
588 netdev_err(dev, "No ports can be present during mode change\n");
589 return -EBUSY;
590 }
591
592 if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) {
593 netdev_err(dev, "Unable to change to the same mode the team is in\n");
594 return -EINVAL;
595 }
596
597 new_mode = team_mode_get(kind);
598 if (!new_mode) {
599 netdev_err(dev, "Mode \"%s\" not found\n", kind);
600 return -EINVAL;
601 }
602
603 err = __team_change_mode(team, new_mode);
604 if (err) {
605 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
606 team_mode_put(new_mode);
607 return err;
608 }
609
610 netdev_info(dev, "Mode changed to \"%s\"\n", kind);
611 return 0;
612 }
613
614
615 /************************
616 * Rx path frame handler
617 ************************/
618
619 /* note: already called with rcu_read_lock */
620 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
621 {
622 struct sk_buff *skb = *pskb;
623 struct team_port *port;
624 struct team *team;
625 rx_handler_result_t res;
626
627 skb = skb_share_check(skb, GFP_ATOMIC);
628 if (!skb)
629 return RX_HANDLER_CONSUMED;
630
631 *pskb = skb;
632
633 port = team_port_get_rcu(skb->dev);
634 team = port->team;
635 if (!team_port_enabled(port)) {
636 /* allow exact match delivery for disabled ports */
637 res = RX_HANDLER_EXACT;
638 } else {
639 res = team->ops.receive(team, port, skb);
640 }
641 if (res == RX_HANDLER_ANOTHER) {
642 struct team_pcpu_stats *pcpu_stats;
643
644 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
645 u64_stats_update_begin(&pcpu_stats->syncp);
646 pcpu_stats->rx_packets++;
647 pcpu_stats->rx_bytes += skb->len;
648 if (skb->pkt_type == PACKET_MULTICAST)
649 pcpu_stats->rx_multicast++;
650 u64_stats_update_end(&pcpu_stats->syncp);
651
652 skb->dev = team->dev;
653 } else {
654 this_cpu_inc(team->pcpu_stats->rx_dropped);
655 }
656
657 return res;
658 }
659
660
661 /****************
662 * Port handling
663 ****************/
664
665 static bool team_port_find(const struct team *team,
666 const struct team_port *port)
667 {
668 struct team_port *cur;
669
670 list_for_each_entry(cur, &team->port_list, list)
671 if (cur == port)
672 return true;
673 return false;
674 }
675
676 /*
677 * Enable/disable port by adding to enabled port hashlist and setting
678 * port->index (Might be racy so reader could see incorrect ifindex when
679 * processing a flying packet, but that is not a problem). Write guarded
680 * by team->lock.
681 */
682 static void team_port_enable(struct team *team,
683 struct team_port *port)
684 {
685 if (team_port_enabled(port))
686 return;
687 port->index = team->en_port_count++;
688 hlist_add_head_rcu(&port->hlist,
689 team_port_index_hash(team, port->index));
690 team_adjust_ops(team);
691 if (team->ops.port_enabled)
692 team->ops.port_enabled(team, port);
693 }
694
695 static void __reconstruct_port_hlist(struct team *team, int rm_index)
696 {
697 int i;
698 struct team_port *port;
699
700 for (i = rm_index + 1; i < team->en_port_count; i++) {
701 port = team_get_port_by_index(team, i);
702 hlist_del_rcu(&port->hlist);
703 port->index--;
704 hlist_add_head_rcu(&port->hlist,
705 team_port_index_hash(team, port->index));
706 }
707 }
708
709 static void team_port_disable(struct team *team,
710 struct team_port *port)
711 {
712 if (!team_port_enabled(port))
713 return;
714 if (team->ops.port_disabled)
715 team->ops.port_disabled(team, port);
716 hlist_del_rcu(&port->hlist);
717 __reconstruct_port_hlist(team, port->index);
718 port->index = -1;
719 __team_adjust_ops(team, team->en_port_count - 1);
720 /*
721 * Wait until readers see adjusted ops. This ensures that
722 * readers never see team->en_port_count == 0
723 */
724 synchronize_rcu();
725 team->en_port_count--;
726 }
727
728 #define TEAM_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \
729 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
730 NETIF_F_HIGHDMA | NETIF_F_LRO)
731
732 static void __team_compute_features(struct team *team)
733 {
734 struct team_port *port;
735 u32 vlan_features = TEAM_VLAN_FEATURES;
736 unsigned short max_hard_header_len = ETH_HLEN;
737 unsigned int flags, dst_release_flag = IFF_XMIT_DST_RELEASE;
738
739 list_for_each_entry(port, &team->port_list, list) {
740 vlan_features = netdev_increment_features(vlan_features,
741 port->dev->vlan_features,
742 TEAM_VLAN_FEATURES);
743
744 dst_release_flag &= port->dev->priv_flags;
745 if (port->dev->hard_header_len > max_hard_header_len)
746 max_hard_header_len = port->dev->hard_header_len;
747 }
748
749 team->dev->vlan_features = vlan_features;
750 team->dev->hard_header_len = max_hard_header_len;
751
752 flags = team->dev->priv_flags & ~IFF_XMIT_DST_RELEASE;
753 team->dev->priv_flags = flags | dst_release_flag;
754
755 netdev_change_features(team->dev);
756 }
757
758 static void team_compute_features(struct team *team)
759 {
760 mutex_lock(&team->lock);
761 __team_compute_features(team);
762 mutex_unlock(&team->lock);
763 }
764
765 static int team_port_enter(struct team *team, struct team_port *port)
766 {
767 int err = 0;
768
769 dev_hold(team->dev);
770 port->dev->priv_flags |= IFF_TEAM_PORT;
771 if (team->ops.port_enter) {
772 err = team->ops.port_enter(team, port);
773 if (err) {
774 netdev_err(team->dev, "Device %s failed to enter team mode\n",
775 port->dev->name);
776 goto err_port_enter;
777 }
778 }
779
780 return 0;
781
782 err_port_enter:
783 port->dev->priv_flags &= ~IFF_TEAM_PORT;
784 dev_put(team->dev);
785
786 return err;
787 }
788
789 static void team_port_leave(struct team *team, struct team_port *port)
790 {
791 if (team->ops.port_leave)
792 team->ops.port_leave(team, port);
793 port->dev->priv_flags &= ~IFF_TEAM_PORT;
794 dev_put(team->dev);
795 }
796
797 #ifdef CONFIG_NET_POLL_CONTROLLER
798 static int team_port_enable_netpoll(struct team *team, struct team_port *port,
799 gfp_t gfp)
800 {
801 struct netpoll *np;
802 int err;
803
804 np = kzalloc(sizeof(*np), gfp);
805 if (!np)
806 return -ENOMEM;
807
808 err = __netpoll_setup(np, port->dev, gfp);
809 if (err) {
810 kfree(np);
811 return err;
812 }
813 port->np = np;
814 return err;
815 }
816
817 static void team_port_disable_netpoll(struct team_port *port)
818 {
819 struct netpoll *np = port->np;
820
821 if (!np)
822 return;
823 port->np = NULL;
824
825 /* Wait for transmitting packets to finish before freeing. */
826 synchronize_rcu_bh();
827 __netpoll_cleanup(np);
828 kfree(np);
829 }
830
831 static struct netpoll_info *team_netpoll_info(struct team *team)
832 {
833 return team->dev->npinfo;
834 }
835
836 #else
837 static int team_port_enable_netpoll(struct team *team, struct team_port *port,
838 gfp_t gfp)
839 {
840 return 0;
841 }
842 static void team_port_disable_netpoll(struct team_port *port)
843 {
844 }
845 static struct netpoll_info *team_netpoll_info(struct team *team)
846 {
847 return NULL;
848 }
849 #endif
850
851 static void __team_port_change_check(struct team_port *port, bool linkup);
852
853 static int team_port_add(struct team *team, struct net_device *port_dev)
854 {
855 struct net_device *dev = team->dev;
856 struct team_port *port;
857 char *portname = port_dev->name;
858 int err;
859
860 if (port_dev->flags & IFF_LOOPBACK ||
861 port_dev->type != ARPHRD_ETHER) {
862 netdev_err(dev, "Device %s is of an unsupported type\n",
863 portname);
864 return -EINVAL;
865 }
866
867 if (team_port_exists(port_dev)) {
868 netdev_err(dev, "Device %s is already a port "
869 "of a team device\n", portname);
870 return -EBUSY;
871 }
872
873 if (port_dev->flags & IFF_UP) {
874 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
875 portname);
876 return -EBUSY;
877 }
878
879 port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
880 GFP_KERNEL);
881 if (!port)
882 return -ENOMEM;
883
884 port->dev = port_dev;
885 port->team = team;
886
887 port->orig.mtu = port_dev->mtu;
888 err = dev_set_mtu(port_dev, dev->mtu);
889 if (err) {
890 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
891 goto err_set_mtu;
892 }
893
894 memcpy(port->orig.dev_addr, port_dev->dev_addr, ETH_ALEN);
895
896 err = team_port_enter(team, port);
897 if (err) {
898 netdev_err(dev, "Device %s failed to enter team mode\n",
899 portname);
900 goto err_port_enter;
901 }
902
903 err = dev_open(port_dev);
904 if (err) {
905 netdev_dbg(dev, "Device %s opening failed\n",
906 portname);
907 goto err_dev_open;
908 }
909
910 err = vlan_vids_add_by_dev(port_dev, dev);
911 if (err) {
912 netdev_err(dev, "Failed to add vlan ids to device %s\n",
913 portname);
914 goto err_vids_add;
915 }
916
917 if (team_netpoll_info(team)) {
918 err = team_port_enable_netpoll(team, port, GFP_KERNEL);
919 if (err) {
920 netdev_err(dev, "Failed to enable netpoll on device %s\n",
921 portname);
922 goto err_enable_netpoll;
923 }
924 }
925
926 err = netdev_set_master(port_dev, dev);
927 if (err) {
928 netdev_err(dev, "Device %s failed to set master\n", portname);
929 goto err_set_master;
930 }
931
932 err = netdev_rx_handler_register(port_dev, team_handle_frame,
933 port);
934 if (err) {
935 netdev_err(dev, "Device %s failed to register rx_handler\n",
936 portname);
937 goto err_handler_register;
938 }
939
940 err = __team_option_inst_add_port(team, port);
941 if (err) {
942 netdev_err(dev, "Device %s failed to add per-port options\n",
943 portname);
944 goto err_option_port_add;
945 }
946
947 port->index = -1;
948 team_port_enable(team, port);
949 list_add_tail_rcu(&port->list, &team->port_list);
950 __team_compute_features(team);
951 __team_port_change_check(port, !!netif_carrier_ok(port_dev));
952 __team_options_change_check(team);
953
954 netdev_info(dev, "Port device %s added\n", portname);
955
956 return 0;
957
958 err_option_port_add:
959 netdev_rx_handler_unregister(port_dev);
960
961 err_handler_register:
962 netdev_set_master(port_dev, NULL);
963
964 err_set_master:
965 team_port_disable_netpoll(port);
966
967 err_enable_netpoll:
968 vlan_vids_del_by_dev(port_dev, dev);
969
970 err_vids_add:
971 dev_close(port_dev);
972
973 err_dev_open:
974 team_port_leave(team, port);
975 team_port_set_orig_mac(port);
976
977 err_port_enter:
978 dev_set_mtu(port_dev, port->orig.mtu);
979
980 err_set_mtu:
981 kfree(port);
982
983 return err;
984 }
985
986 static int team_port_del(struct team *team, struct net_device *port_dev)
987 {
988 struct net_device *dev = team->dev;
989 struct team_port *port;
990 char *portname = port_dev->name;
991
992 port = team_port_get_rtnl(port_dev);
993 if (!port || !team_port_find(team, port)) {
994 netdev_err(dev, "Device %s does not act as a port of this team\n",
995 portname);
996 return -ENOENT;
997 }
998
999 __team_option_inst_mark_removed_port(team, port);
1000 __team_options_change_check(team);
1001 __team_option_inst_del_port(team, port);
1002 port->removed = true;
1003 __team_port_change_check(port, false);
1004 team_port_disable(team, port);
1005 list_del_rcu(&port->list);
1006 netdev_rx_handler_unregister(port_dev);
1007 netdev_set_master(port_dev, NULL);
1008 team_port_disable_netpoll(port);
1009 vlan_vids_del_by_dev(port_dev, dev);
1010 dev_close(port_dev);
1011 team_port_leave(team, port);
1012 team_port_set_orig_mac(port);
1013 dev_set_mtu(port_dev, port->orig.mtu);
1014 synchronize_rcu();
1015 kfree(port);
1016 netdev_info(dev, "Port device %s removed\n", portname);
1017 __team_compute_features(team);
1018
1019 return 0;
1020 }
1021
1022
1023 /*****************
1024 * Net device ops
1025 *****************/
1026
1027 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1028 {
1029 ctx->data.str_val = team->mode->kind;
1030 return 0;
1031 }
1032
1033 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1034 {
1035 return team_change_mode(team, ctx->data.str_val);
1036 }
1037
1038 static int team_port_en_option_get(struct team *team,
1039 struct team_gsetter_ctx *ctx)
1040 {
1041 struct team_port *port = ctx->info->port;
1042
1043 ctx->data.bool_val = team_port_enabled(port);
1044 return 0;
1045 }
1046
1047 static int team_port_en_option_set(struct team *team,
1048 struct team_gsetter_ctx *ctx)
1049 {
1050 struct team_port *port = ctx->info->port;
1051
1052 if (ctx->data.bool_val)
1053 team_port_enable(team, port);
1054 else
1055 team_port_disable(team, port);
1056 return 0;
1057 }
1058
1059 static int team_user_linkup_option_get(struct team *team,
1060 struct team_gsetter_ctx *ctx)
1061 {
1062 struct team_port *port = ctx->info->port;
1063
1064 ctx->data.bool_val = port->user.linkup;
1065 return 0;
1066 }
1067
1068 static int team_user_linkup_option_set(struct team *team,
1069 struct team_gsetter_ctx *ctx)
1070 {
1071 struct team_port *port = ctx->info->port;
1072
1073 port->user.linkup = ctx->data.bool_val;
1074 team_refresh_port_linkup(port);
1075 return 0;
1076 }
1077
1078 static int team_user_linkup_en_option_get(struct team *team,
1079 struct team_gsetter_ctx *ctx)
1080 {
1081 struct team_port *port = ctx->info->port;
1082
1083 ctx->data.bool_val = port->user.linkup_enabled;
1084 return 0;
1085 }
1086
1087 static int team_user_linkup_en_option_set(struct team *team,
1088 struct team_gsetter_ctx *ctx)
1089 {
1090 struct team_port *port = ctx->info->port;
1091
1092 port->user.linkup_enabled = ctx->data.bool_val;
1093 team_refresh_port_linkup(port);
1094 return 0;
1095 }
1096
1097 static const struct team_option team_options[] = {
1098 {
1099 .name = "mode",
1100 .type = TEAM_OPTION_TYPE_STRING,
1101 .getter = team_mode_option_get,
1102 .setter = team_mode_option_set,
1103 },
1104 {
1105 .name = "enabled",
1106 .type = TEAM_OPTION_TYPE_BOOL,
1107 .per_port = true,
1108 .getter = team_port_en_option_get,
1109 .setter = team_port_en_option_set,
1110 },
1111 {
1112 .name = "user_linkup",
1113 .type = TEAM_OPTION_TYPE_BOOL,
1114 .per_port = true,
1115 .getter = team_user_linkup_option_get,
1116 .setter = team_user_linkup_option_set,
1117 },
1118 {
1119 .name = "user_linkup_enabled",
1120 .type = TEAM_OPTION_TYPE_BOOL,
1121 .per_port = true,
1122 .getter = team_user_linkup_en_option_get,
1123 .setter = team_user_linkup_en_option_set,
1124 },
1125 };
1126
1127 static struct lock_class_key team_netdev_xmit_lock_key;
1128 static struct lock_class_key team_netdev_addr_lock_key;
1129
1130 static void team_set_lockdep_class_one(struct net_device *dev,
1131 struct netdev_queue *txq,
1132 void *unused)
1133 {
1134 lockdep_set_class(&txq->_xmit_lock, &team_netdev_xmit_lock_key);
1135 }
1136
1137 static void team_set_lockdep_class(struct net_device *dev)
1138 {
1139 lockdep_set_class(&dev->addr_list_lock, &team_netdev_addr_lock_key);
1140 netdev_for_each_tx_queue(dev, team_set_lockdep_class_one, NULL);
1141 }
1142
1143 static int team_init(struct net_device *dev)
1144 {
1145 struct team *team = netdev_priv(dev);
1146 int i;
1147 int err;
1148
1149 team->dev = dev;
1150 mutex_init(&team->lock);
1151 team_set_no_mode(team);
1152
1153 team->pcpu_stats = alloc_percpu(struct team_pcpu_stats);
1154 if (!team->pcpu_stats)
1155 return -ENOMEM;
1156
1157 for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1158 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1159 INIT_LIST_HEAD(&team->port_list);
1160
1161 team_adjust_ops(team);
1162
1163 INIT_LIST_HEAD(&team->option_list);
1164 INIT_LIST_HEAD(&team->option_inst_list);
1165 err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1166 if (err)
1167 goto err_options_register;
1168 netif_carrier_off(dev);
1169
1170 team_set_lockdep_class(dev);
1171
1172 return 0;
1173
1174 err_options_register:
1175 free_percpu(team->pcpu_stats);
1176
1177 return err;
1178 }
1179
1180 static void team_uninit(struct net_device *dev)
1181 {
1182 struct team *team = netdev_priv(dev);
1183 struct team_port *port;
1184 struct team_port *tmp;
1185
1186 mutex_lock(&team->lock);
1187 list_for_each_entry_safe(port, tmp, &team->port_list, list)
1188 team_port_del(team, port->dev);
1189
1190 __team_change_mode(team, NULL); /* cleanup */
1191 __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1192 mutex_unlock(&team->lock);
1193 }
1194
1195 static void team_destructor(struct net_device *dev)
1196 {
1197 struct team *team = netdev_priv(dev);
1198
1199 free_percpu(team->pcpu_stats);
1200 free_netdev(dev);
1201 }
1202
1203 static int team_open(struct net_device *dev)
1204 {
1205 netif_carrier_on(dev);
1206 return 0;
1207 }
1208
1209 static int team_close(struct net_device *dev)
1210 {
1211 netif_carrier_off(dev);
1212 return 0;
1213 }
1214
1215 /*
1216 * note: already called with rcu_read_lock
1217 */
1218 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1219 {
1220 struct team *team = netdev_priv(dev);
1221 bool tx_success = false;
1222 unsigned int len = skb->len;
1223
1224 tx_success = team->ops.transmit(team, skb);
1225 if (tx_success) {
1226 struct team_pcpu_stats *pcpu_stats;
1227
1228 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1229 u64_stats_update_begin(&pcpu_stats->syncp);
1230 pcpu_stats->tx_packets++;
1231 pcpu_stats->tx_bytes += len;
1232 u64_stats_update_end(&pcpu_stats->syncp);
1233 } else {
1234 this_cpu_inc(team->pcpu_stats->tx_dropped);
1235 }
1236
1237 return NETDEV_TX_OK;
1238 }
1239
1240 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb)
1241 {
1242 /*
1243 * This helper function exists to help dev_pick_tx get the correct
1244 * destination queue. Using a helper function skips a call to
1245 * skb_tx_hash and will put the skbs in the queue we expect on their
1246 * way down to the team driver.
1247 */
1248 u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1249
1250 /*
1251 * Save the original txq to restore before passing to the driver
1252 */
1253 qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1254
1255 if (unlikely(txq >= dev->real_num_tx_queues)) {
1256 do {
1257 txq -= dev->real_num_tx_queues;
1258 } while (txq >= dev->real_num_tx_queues);
1259 }
1260 return txq;
1261 }
1262
1263 static void team_change_rx_flags(struct net_device *dev, int change)
1264 {
1265 struct team *team = netdev_priv(dev);
1266 struct team_port *port;
1267 int inc;
1268
1269 rcu_read_lock();
1270 list_for_each_entry_rcu(port, &team->port_list, list) {
1271 if (change & IFF_PROMISC) {
1272 inc = dev->flags & IFF_PROMISC ? 1 : -1;
1273 dev_set_promiscuity(port->dev, inc);
1274 }
1275 if (change & IFF_ALLMULTI) {
1276 inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1277 dev_set_allmulti(port->dev, inc);
1278 }
1279 }
1280 rcu_read_unlock();
1281 }
1282
1283 static void team_set_rx_mode(struct net_device *dev)
1284 {
1285 struct team *team = netdev_priv(dev);
1286 struct team_port *port;
1287
1288 rcu_read_lock();
1289 list_for_each_entry_rcu(port, &team->port_list, list) {
1290 dev_uc_sync(port->dev, dev);
1291 dev_mc_sync(port->dev, dev);
1292 }
1293 rcu_read_unlock();
1294 }
1295
1296 static int team_set_mac_address(struct net_device *dev, void *p)
1297 {
1298 struct team *team = netdev_priv(dev);
1299 struct team_port *port;
1300 int err;
1301
1302 err = eth_mac_addr(dev, p);
1303 if (err)
1304 return err;
1305 rcu_read_lock();
1306 list_for_each_entry_rcu(port, &team->port_list, list)
1307 if (team->ops.port_change_mac)
1308 team->ops.port_change_mac(team, port);
1309 rcu_read_unlock();
1310 return 0;
1311 }
1312
1313 static int team_change_mtu(struct net_device *dev, int new_mtu)
1314 {
1315 struct team *team = netdev_priv(dev);
1316 struct team_port *port;
1317 int err;
1318
1319 /*
1320 * Alhough this is reader, it's guarded by team lock. It's not possible
1321 * to traverse list in reverse under rcu_read_lock
1322 */
1323 mutex_lock(&team->lock);
1324 list_for_each_entry(port, &team->port_list, list) {
1325 err = dev_set_mtu(port->dev, new_mtu);
1326 if (err) {
1327 netdev_err(dev, "Device %s failed to change mtu",
1328 port->dev->name);
1329 goto unwind;
1330 }
1331 }
1332 mutex_unlock(&team->lock);
1333
1334 dev->mtu = new_mtu;
1335
1336 return 0;
1337
1338 unwind:
1339 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1340 dev_set_mtu(port->dev, dev->mtu);
1341 mutex_unlock(&team->lock);
1342
1343 return err;
1344 }
1345
1346 static struct rtnl_link_stats64 *
1347 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1348 {
1349 struct team *team = netdev_priv(dev);
1350 struct team_pcpu_stats *p;
1351 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1352 u32 rx_dropped = 0, tx_dropped = 0;
1353 unsigned int start;
1354 int i;
1355
1356 for_each_possible_cpu(i) {
1357 p = per_cpu_ptr(team->pcpu_stats, i);
1358 do {
1359 start = u64_stats_fetch_begin_bh(&p->syncp);
1360 rx_packets = p->rx_packets;
1361 rx_bytes = p->rx_bytes;
1362 rx_multicast = p->rx_multicast;
1363 tx_packets = p->tx_packets;
1364 tx_bytes = p->tx_bytes;
1365 } while (u64_stats_fetch_retry_bh(&p->syncp, start));
1366
1367 stats->rx_packets += rx_packets;
1368 stats->rx_bytes += rx_bytes;
1369 stats->multicast += rx_multicast;
1370 stats->tx_packets += tx_packets;
1371 stats->tx_bytes += tx_bytes;
1372 /*
1373 * rx_dropped & tx_dropped are u32, updated
1374 * without syncp protection.
1375 */
1376 rx_dropped += p->rx_dropped;
1377 tx_dropped += p->tx_dropped;
1378 }
1379 stats->rx_dropped = rx_dropped;
1380 stats->tx_dropped = tx_dropped;
1381 return stats;
1382 }
1383
1384 static int team_vlan_rx_add_vid(struct net_device *dev, uint16_t vid)
1385 {
1386 struct team *team = netdev_priv(dev);
1387 struct team_port *port;
1388 int err;
1389
1390 /*
1391 * Alhough this is reader, it's guarded by team lock. It's not possible
1392 * to traverse list in reverse under rcu_read_lock
1393 */
1394 mutex_lock(&team->lock);
1395 list_for_each_entry(port, &team->port_list, list) {
1396 err = vlan_vid_add(port->dev, vid);
1397 if (err)
1398 goto unwind;
1399 }
1400 mutex_unlock(&team->lock);
1401
1402 return 0;
1403
1404 unwind:
1405 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1406 vlan_vid_del(port->dev, vid);
1407 mutex_unlock(&team->lock);
1408
1409 return err;
1410 }
1411
1412 static int team_vlan_rx_kill_vid(struct net_device *dev, uint16_t vid)
1413 {
1414 struct team *team = netdev_priv(dev);
1415 struct team_port *port;
1416
1417 rcu_read_lock();
1418 list_for_each_entry_rcu(port, &team->port_list, list)
1419 vlan_vid_del(port->dev, vid);
1420 rcu_read_unlock();
1421
1422 return 0;
1423 }
1424
1425 #ifdef CONFIG_NET_POLL_CONTROLLER
1426 static void team_poll_controller(struct net_device *dev)
1427 {
1428 }
1429
1430 static void __team_netpoll_cleanup(struct team *team)
1431 {
1432 struct team_port *port;
1433
1434 list_for_each_entry(port, &team->port_list, list)
1435 team_port_disable_netpoll(port);
1436 }
1437
1438 static void team_netpoll_cleanup(struct net_device *dev)
1439 {
1440 struct team *team = netdev_priv(dev);
1441
1442 mutex_lock(&team->lock);
1443 __team_netpoll_cleanup(team);
1444 mutex_unlock(&team->lock);
1445 }
1446
1447 static int team_netpoll_setup(struct net_device *dev,
1448 struct netpoll_info *npifo, gfp_t gfp)
1449 {
1450 struct team *team = netdev_priv(dev);
1451 struct team_port *port;
1452 int err = 0;
1453
1454 mutex_lock(&team->lock);
1455 list_for_each_entry(port, &team->port_list, list) {
1456 err = team_port_enable_netpoll(team, port, gfp);
1457 if (err) {
1458 __team_netpoll_cleanup(team);
1459 break;
1460 }
1461 }
1462 mutex_unlock(&team->lock);
1463 return err;
1464 }
1465 #endif
1466
1467 static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
1468 {
1469 struct team *team = netdev_priv(dev);
1470 int err;
1471
1472 mutex_lock(&team->lock);
1473 err = team_port_add(team, port_dev);
1474 mutex_unlock(&team->lock);
1475 return err;
1476 }
1477
1478 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1479 {
1480 struct team *team = netdev_priv(dev);
1481 int err;
1482
1483 mutex_lock(&team->lock);
1484 err = team_port_del(team, port_dev);
1485 mutex_unlock(&team->lock);
1486 return err;
1487 }
1488
1489 static netdev_features_t team_fix_features(struct net_device *dev,
1490 netdev_features_t features)
1491 {
1492 struct team_port *port;
1493 struct team *team = netdev_priv(dev);
1494 netdev_features_t mask;
1495
1496 mask = features;
1497 features &= ~NETIF_F_ONE_FOR_ALL;
1498 features |= NETIF_F_ALL_FOR_ALL;
1499
1500 rcu_read_lock();
1501 list_for_each_entry_rcu(port, &team->port_list, list) {
1502 features = netdev_increment_features(features,
1503 port->dev->features,
1504 mask);
1505 }
1506 rcu_read_unlock();
1507 return features;
1508 }
1509
1510 static const struct net_device_ops team_netdev_ops = {
1511 .ndo_init = team_init,
1512 .ndo_uninit = team_uninit,
1513 .ndo_open = team_open,
1514 .ndo_stop = team_close,
1515 .ndo_start_xmit = team_xmit,
1516 .ndo_select_queue = team_select_queue,
1517 .ndo_change_rx_flags = team_change_rx_flags,
1518 .ndo_set_rx_mode = team_set_rx_mode,
1519 .ndo_set_mac_address = team_set_mac_address,
1520 .ndo_change_mtu = team_change_mtu,
1521 .ndo_get_stats64 = team_get_stats64,
1522 .ndo_vlan_rx_add_vid = team_vlan_rx_add_vid,
1523 .ndo_vlan_rx_kill_vid = team_vlan_rx_kill_vid,
1524 #ifdef CONFIG_NET_POLL_CONTROLLER
1525 .ndo_poll_controller = team_poll_controller,
1526 .ndo_netpoll_setup = team_netpoll_setup,
1527 .ndo_netpoll_cleanup = team_netpoll_cleanup,
1528 #endif
1529 .ndo_add_slave = team_add_slave,
1530 .ndo_del_slave = team_del_slave,
1531 .ndo_fix_features = team_fix_features,
1532 };
1533
1534
1535 /***********************
1536 * rt netlink interface
1537 ***********************/
1538
1539 static void team_setup(struct net_device *dev)
1540 {
1541 ether_setup(dev);
1542
1543 dev->netdev_ops = &team_netdev_ops;
1544 dev->destructor = team_destructor;
1545 dev->tx_queue_len = 0;
1546 dev->flags |= IFF_MULTICAST;
1547 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
1548
1549 /*
1550 * Indicate we support unicast address filtering. That way core won't
1551 * bring us to promisc mode in case a unicast addr is added.
1552 * Let this up to underlay drivers.
1553 */
1554 dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
1555
1556 dev->features |= NETIF_F_LLTX;
1557 dev->features |= NETIF_F_GRO;
1558 dev->hw_features = NETIF_F_HW_VLAN_TX |
1559 NETIF_F_HW_VLAN_RX |
1560 NETIF_F_HW_VLAN_FILTER;
1561
1562 dev->features |= dev->hw_features;
1563 }
1564
1565 static int team_newlink(struct net *src_net, struct net_device *dev,
1566 struct nlattr *tb[], struct nlattr *data[])
1567 {
1568 int err;
1569
1570 if (tb[IFLA_ADDRESS] == NULL)
1571 eth_hw_addr_random(dev);
1572
1573 err = register_netdevice(dev);
1574 if (err)
1575 return err;
1576
1577 return 0;
1578 }
1579
1580 static int team_validate(struct nlattr *tb[], struct nlattr *data[])
1581 {
1582 if (tb[IFLA_ADDRESS]) {
1583 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
1584 return -EINVAL;
1585 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
1586 return -EADDRNOTAVAIL;
1587 }
1588 return 0;
1589 }
1590
1591 static unsigned int team_get_num_tx_queues(void)
1592 {
1593 return TEAM_DEFAULT_NUM_TX_QUEUES;
1594 }
1595
1596 static unsigned int team_get_num_rx_queues(void)
1597 {
1598 return TEAM_DEFAULT_NUM_RX_QUEUES;
1599 }
1600
1601 static struct rtnl_link_ops team_link_ops __read_mostly = {
1602 .kind = DRV_NAME,
1603 .priv_size = sizeof(struct team),
1604 .setup = team_setup,
1605 .newlink = team_newlink,
1606 .validate = team_validate,
1607 .get_num_tx_queues = team_get_num_tx_queues,
1608 .get_num_rx_queues = team_get_num_rx_queues,
1609 };
1610
1611
1612 /***********************************
1613 * Generic netlink custom interface
1614 ***********************************/
1615
1616 static struct genl_family team_nl_family = {
1617 .id = GENL_ID_GENERATE,
1618 .name = TEAM_GENL_NAME,
1619 .version = TEAM_GENL_VERSION,
1620 .maxattr = TEAM_ATTR_MAX,
1621 .netnsok = true,
1622 };
1623
1624 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
1625 [TEAM_ATTR_UNSPEC] = { .type = NLA_UNSPEC, },
1626 [TEAM_ATTR_TEAM_IFINDEX] = { .type = NLA_U32 },
1627 [TEAM_ATTR_LIST_OPTION] = { .type = NLA_NESTED },
1628 [TEAM_ATTR_LIST_PORT] = { .type = NLA_NESTED },
1629 };
1630
1631 static const struct nla_policy
1632 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
1633 [TEAM_ATTR_OPTION_UNSPEC] = { .type = NLA_UNSPEC, },
1634 [TEAM_ATTR_OPTION_NAME] = {
1635 .type = NLA_STRING,
1636 .len = TEAM_STRING_MAX_LEN,
1637 },
1638 [TEAM_ATTR_OPTION_CHANGED] = { .type = NLA_FLAG },
1639 [TEAM_ATTR_OPTION_TYPE] = { .type = NLA_U8 },
1640 [TEAM_ATTR_OPTION_DATA] = { .type = NLA_BINARY },
1641 };
1642
1643 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
1644 {
1645 struct sk_buff *msg;
1646 void *hdr;
1647 int err;
1648
1649 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1650 if (!msg)
1651 return -ENOMEM;
1652
1653 hdr = genlmsg_put(msg, info->snd_pid, info->snd_seq,
1654 &team_nl_family, 0, TEAM_CMD_NOOP);
1655 if (IS_ERR(hdr)) {
1656 err = PTR_ERR(hdr);
1657 goto err_msg_put;
1658 }
1659
1660 genlmsg_end(msg, hdr);
1661
1662 return genlmsg_unicast(genl_info_net(info), msg, info->snd_pid);
1663
1664 err_msg_put:
1665 nlmsg_free(msg);
1666
1667 return err;
1668 }
1669
1670 /*
1671 * Netlink cmd functions should be locked by following two functions.
1672 * Since dev gets held here, that ensures dev won't disappear in between.
1673 */
1674 static struct team *team_nl_team_get(struct genl_info *info)
1675 {
1676 struct net *net = genl_info_net(info);
1677 int ifindex;
1678 struct net_device *dev;
1679 struct team *team;
1680
1681 if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
1682 return NULL;
1683
1684 ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
1685 dev = dev_get_by_index(net, ifindex);
1686 if (!dev || dev->netdev_ops != &team_netdev_ops) {
1687 if (dev)
1688 dev_put(dev);
1689 return NULL;
1690 }
1691
1692 team = netdev_priv(dev);
1693 mutex_lock(&team->lock);
1694 return team;
1695 }
1696
1697 static void team_nl_team_put(struct team *team)
1698 {
1699 mutex_unlock(&team->lock);
1700 dev_put(team->dev);
1701 }
1702
1703 static int team_nl_send_generic(struct genl_info *info, struct team *team,
1704 int (*fill_func)(struct sk_buff *skb,
1705 struct genl_info *info,
1706 int flags, struct team *team))
1707 {
1708 struct sk_buff *skb;
1709 int err;
1710
1711 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1712 if (!skb)
1713 return -ENOMEM;
1714
1715 err = fill_func(skb, info, NLM_F_ACK, team);
1716 if (err < 0)
1717 goto err_fill;
1718
1719 err = genlmsg_unicast(genl_info_net(info), skb, info->snd_pid);
1720 return err;
1721
1722 err_fill:
1723 nlmsg_free(skb);
1724 return err;
1725 }
1726
1727 typedef int team_nl_send_func_t(struct sk_buff *skb,
1728 struct team *team, u32 pid);
1729
1730 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 pid)
1731 {
1732 return genlmsg_unicast(dev_net(team->dev), skb, pid);
1733 }
1734
1735 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
1736 struct team_option_inst *opt_inst)
1737 {
1738 struct nlattr *option_item;
1739 struct team_option *option = opt_inst->option;
1740 struct team_option_inst_info *opt_inst_info = &opt_inst->info;
1741 struct team_gsetter_ctx ctx;
1742 int err;
1743
1744 ctx.info = opt_inst_info;
1745 err = team_option_get(team, opt_inst, &ctx);
1746 if (err)
1747 return err;
1748
1749 option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
1750 if (!option_item)
1751 return -EMSGSIZE;
1752
1753 if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
1754 goto nest_cancel;
1755 if (opt_inst_info->port &&
1756 nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
1757 opt_inst_info->port->dev->ifindex))
1758 goto nest_cancel;
1759 if (opt_inst->option->array_size &&
1760 nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
1761 opt_inst_info->array_index))
1762 goto nest_cancel;
1763
1764 switch (option->type) {
1765 case TEAM_OPTION_TYPE_U32:
1766 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
1767 goto nest_cancel;
1768 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
1769 goto nest_cancel;
1770 break;
1771 case TEAM_OPTION_TYPE_STRING:
1772 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
1773 goto nest_cancel;
1774 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
1775 ctx.data.str_val))
1776 goto nest_cancel;
1777 break;
1778 case TEAM_OPTION_TYPE_BINARY:
1779 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
1780 goto nest_cancel;
1781 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
1782 ctx.data.bin_val.ptr))
1783 goto nest_cancel;
1784 break;
1785 case TEAM_OPTION_TYPE_BOOL:
1786 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
1787 goto nest_cancel;
1788 if (ctx.data.bool_val &&
1789 nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
1790 goto nest_cancel;
1791 break;
1792 default:
1793 BUG();
1794 }
1795 if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
1796 goto nest_cancel;
1797 if (opt_inst->changed) {
1798 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
1799 goto nest_cancel;
1800 opt_inst->changed = false;
1801 }
1802 nla_nest_end(skb, option_item);
1803 return 0;
1804
1805 nest_cancel:
1806 nla_nest_cancel(skb, option_item);
1807 return -EMSGSIZE;
1808 }
1809
1810 static int __send_and_alloc_skb(struct sk_buff **pskb,
1811 struct team *team, u32 pid,
1812 team_nl_send_func_t *send_func)
1813 {
1814 int err;
1815
1816 if (*pskb) {
1817 err = send_func(*pskb, team, pid);
1818 if (err)
1819 return err;
1820 }
1821 *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
1822 if (!*pskb)
1823 return -ENOMEM;
1824 return 0;
1825 }
1826
1827 static int team_nl_send_options_get(struct team *team, u32 pid, u32 seq,
1828 int flags, team_nl_send_func_t *send_func,
1829 struct list_head *sel_opt_inst_list)
1830 {
1831 struct nlattr *option_list;
1832 struct nlmsghdr *nlh;
1833 void *hdr;
1834 struct team_option_inst *opt_inst;
1835 int err;
1836 struct sk_buff *skb = NULL;
1837 bool incomplete;
1838 int i;
1839
1840 opt_inst = list_first_entry(sel_opt_inst_list,
1841 struct team_option_inst, tmp_list);
1842
1843 start_again:
1844 err = __send_and_alloc_skb(&skb, team, pid, send_func);
1845 if (err)
1846 return err;
1847
1848 hdr = genlmsg_put(skb, pid, seq, &team_nl_family, flags | NLM_F_MULTI,
1849 TEAM_CMD_OPTIONS_GET);
1850 if (IS_ERR(hdr))
1851 return PTR_ERR(hdr);
1852
1853 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
1854 goto nla_put_failure;
1855 option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
1856 if (!option_list)
1857 goto nla_put_failure;
1858
1859 i = 0;
1860 incomplete = false;
1861 list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
1862 err = team_nl_fill_one_option_get(skb, team, opt_inst);
1863 if (err) {
1864 if (err == -EMSGSIZE) {
1865 if (!i)
1866 goto errout;
1867 incomplete = true;
1868 break;
1869 }
1870 goto errout;
1871 }
1872 i++;
1873 }
1874
1875 nla_nest_end(skb, option_list);
1876 genlmsg_end(skb, hdr);
1877 if (incomplete)
1878 goto start_again;
1879
1880 send_done:
1881 nlh = nlmsg_put(skb, pid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
1882 if (!nlh) {
1883 err = __send_and_alloc_skb(&skb, team, pid, send_func);
1884 if (err)
1885 goto errout;
1886 goto send_done;
1887 }
1888
1889 return send_func(skb, team, pid);
1890
1891 nla_put_failure:
1892 err = -EMSGSIZE;
1893 errout:
1894 genlmsg_cancel(skb, hdr);
1895 nlmsg_free(skb);
1896 return err;
1897 }
1898
1899 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
1900 {
1901 struct team *team;
1902 struct team_option_inst *opt_inst;
1903 int err;
1904 LIST_HEAD(sel_opt_inst_list);
1905
1906 team = team_nl_team_get(info);
1907 if (!team)
1908 return -EINVAL;
1909
1910 list_for_each_entry(opt_inst, &team->option_inst_list, list)
1911 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
1912 err = team_nl_send_options_get(team, info->snd_pid, info->snd_seq,
1913 NLM_F_ACK, team_nl_send_unicast,
1914 &sel_opt_inst_list);
1915
1916 team_nl_team_put(team);
1917
1918 return err;
1919 }
1920
1921 static int team_nl_send_event_options_get(struct team *team,
1922 struct list_head *sel_opt_inst_list);
1923
1924 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
1925 {
1926 struct team *team;
1927 int err = 0;
1928 int i;
1929 struct nlattr *nl_option;
1930 LIST_HEAD(opt_inst_list);
1931
1932 team = team_nl_team_get(info);
1933 if (!team)
1934 return -EINVAL;
1935
1936 err = -EINVAL;
1937 if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
1938 err = -EINVAL;
1939 goto team_put;
1940 }
1941
1942 nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
1943 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
1944 struct nlattr *attr;
1945 struct nlattr *attr_data;
1946 enum team_option_type opt_type;
1947 int opt_port_ifindex = 0; /* != 0 for per-port options */
1948 u32 opt_array_index = 0;
1949 bool opt_is_array = false;
1950 struct team_option_inst *opt_inst;
1951 char *opt_name;
1952 bool opt_found = false;
1953
1954 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
1955 err = -EINVAL;
1956 goto team_put;
1957 }
1958 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
1959 nl_option, team_nl_option_policy);
1960 if (err)
1961 goto team_put;
1962 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
1963 !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
1964 err = -EINVAL;
1965 goto team_put;
1966 }
1967 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
1968 case NLA_U32:
1969 opt_type = TEAM_OPTION_TYPE_U32;
1970 break;
1971 case NLA_STRING:
1972 opt_type = TEAM_OPTION_TYPE_STRING;
1973 break;
1974 case NLA_BINARY:
1975 opt_type = TEAM_OPTION_TYPE_BINARY;
1976 break;
1977 case NLA_FLAG:
1978 opt_type = TEAM_OPTION_TYPE_BOOL;
1979 break;
1980 default:
1981 goto team_put;
1982 }
1983
1984 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
1985 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
1986 err = -EINVAL;
1987 goto team_put;
1988 }
1989
1990 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
1991 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
1992 if (attr)
1993 opt_port_ifindex = nla_get_u32(attr);
1994
1995 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
1996 if (attr) {
1997 opt_is_array = true;
1998 opt_array_index = nla_get_u32(attr);
1999 }
2000
2001 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2002 struct team_option *option = opt_inst->option;
2003 struct team_gsetter_ctx ctx;
2004 struct team_option_inst_info *opt_inst_info;
2005 int tmp_ifindex;
2006
2007 opt_inst_info = &opt_inst->info;
2008 tmp_ifindex = opt_inst_info->port ?
2009 opt_inst_info->port->dev->ifindex : 0;
2010 if (option->type != opt_type ||
2011 strcmp(option->name, opt_name) ||
2012 tmp_ifindex != opt_port_ifindex ||
2013 (option->array_size && !opt_is_array) ||
2014 opt_inst_info->array_index != opt_array_index)
2015 continue;
2016 opt_found = true;
2017 ctx.info = opt_inst_info;
2018 switch (opt_type) {
2019 case TEAM_OPTION_TYPE_U32:
2020 ctx.data.u32_val = nla_get_u32(attr_data);
2021 break;
2022 case TEAM_OPTION_TYPE_STRING:
2023 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2024 err = -EINVAL;
2025 goto team_put;
2026 }
2027 ctx.data.str_val = nla_data(attr_data);
2028 break;
2029 case TEAM_OPTION_TYPE_BINARY:
2030 ctx.data.bin_val.len = nla_len(attr_data);
2031 ctx.data.bin_val.ptr = nla_data(attr_data);
2032 break;
2033 case TEAM_OPTION_TYPE_BOOL:
2034 ctx.data.bool_val = attr_data ? true : false;
2035 break;
2036 default:
2037 BUG();
2038 }
2039 err = team_option_set(team, opt_inst, &ctx);
2040 if (err)
2041 goto team_put;
2042 opt_inst->changed = true;
2043 list_add(&opt_inst->tmp_list, &opt_inst_list);
2044 }
2045 if (!opt_found) {
2046 err = -ENOENT;
2047 goto team_put;
2048 }
2049 }
2050
2051 err = team_nl_send_event_options_get(team, &opt_inst_list);
2052
2053 team_put:
2054 team_nl_team_put(team);
2055
2056 return err;
2057 }
2058
2059 static int team_nl_fill_port_list_get(struct sk_buff *skb,
2060 u32 pid, u32 seq, int flags,
2061 struct team *team,
2062 bool fillall)
2063 {
2064 struct nlattr *port_list;
2065 void *hdr;
2066 struct team_port *port;
2067
2068 hdr = genlmsg_put(skb, pid, seq, &team_nl_family, flags,
2069 TEAM_CMD_PORT_LIST_GET);
2070 if (IS_ERR(hdr))
2071 return PTR_ERR(hdr);
2072
2073 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2074 goto nla_put_failure;
2075 port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2076 if (!port_list)
2077 goto nla_put_failure;
2078
2079 list_for_each_entry(port, &team->port_list, list) {
2080 struct nlattr *port_item;
2081
2082 /* Include only changed ports if fill all mode is not on */
2083 if (!fillall && !port->changed)
2084 continue;
2085 port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2086 if (!port_item)
2087 goto nla_put_failure;
2088 if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2089 goto nla_put_failure;
2090 if (port->changed) {
2091 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2092 goto nla_put_failure;
2093 port->changed = false;
2094 }
2095 if ((port->removed &&
2096 nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2097 (port->state.linkup &&
2098 nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2099 nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2100 nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2101 goto nla_put_failure;
2102 nla_nest_end(skb, port_item);
2103 }
2104
2105 nla_nest_end(skb, port_list);
2106 return genlmsg_end(skb, hdr);
2107
2108 nla_put_failure:
2109 genlmsg_cancel(skb, hdr);
2110 return -EMSGSIZE;
2111 }
2112
2113 static int team_nl_fill_port_list_get_all(struct sk_buff *skb,
2114 struct genl_info *info, int flags,
2115 struct team *team)
2116 {
2117 return team_nl_fill_port_list_get(skb, info->snd_pid,
2118 info->snd_seq, NLM_F_ACK,
2119 team, true);
2120 }
2121
2122 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2123 struct genl_info *info)
2124 {
2125 struct team *team;
2126 int err;
2127
2128 team = team_nl_team_get(info);
2129 if (!team)
2130 return -EINVAL;
2131
2132 err = team_nl_send_generic(info, team, team_nl_fill_port_list_get_all);
2133
2134 team_nl_team_put(team);
2135
2136 return err;
2137 }
2138
2139 static struct genl_ops team_nl_ops[] = {
2140 {
2141 .cmd = TEAM_CMD_NOOP,
2142 .doit = team_nl_cmd_noop,
2143 .policy = team_nl_policy,
2144 },
2145 {
2146 .cmd = TEAM_CMD_OPTIONS_SET,
2147 .doit = team_nl_cmd_options_set,
2148 .policy = team_nl_policy,
2149 .flags = GENL_ADMIN_PERM,
2150 },
2151 {
2152 .cmd = TEAM_CMD_OPTIONS_GET,
2153 .doit = team_nl_cmd_options_get,
2154 .policy = team_nl_policy,
2155 .flags = GENL_ADMIN_PERM,
2156 },
2157 {
2158 .cmd = TEAM_CMD_PORT_LIST_GET,
2159 .doit = team_nl_cmd_port_list_get,
2160 .policy = team_nl_policy,
2161 .flags = GENL_ADMIN_PERM,
2162 },
2163 };
2164
2165 static struct genl_multicast_group team_change_event_mcgrp = {
2166 .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME,
2167 };
2168
2169 static int team_nl_send_multicast(struct sk_buff *skb,
2170 struct team *team, u32 pid)
2171 {
2172 return genlmsg_multicast_netns(dev_net(team->dev), skb, 0,
2173 team_change_event_mcgrp.id, GFP_KERNEL);
2174 }
2175
2176 static int team_nl_send_event_options_get(struct team *team,
2177 struct list_head *sel_opt_inst_list)
2178 {
2179 return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2180 sel_opt_inst_list);
2181 }
2182
2183 static int team_nl_send_event_port_list_get(struct team *team)
2184 {
2185 struct sk_buff *skb;
2186 int err;
2187 struct net *net = dev_net(team->dev);
2188
2189 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2190 if (!skb)
2191 return -ENOMEM;
2192
2193 err = team_nl_fill_port_list_get(skb, 0, 0, 0, team, false);
2194 if (err < 0)
2195 goto err_fill;
2196
2197 err = genlmsg_multicast_netns(net, skb, 0, team_change_event_mcgrp.id,
2198 GFP_KERNEL);
2199 return err;
2200
2201 err_fill:
2202 nlmsg_free(skb);
2203 return err;
2204 }
2205
2206 static int team_nl_init(void)
2207 {
2208 int err;
2209
2210 err = genl_register_family_with_ops(&team_nl_family, team_nl_ops,
2211 ARRAY_SIZE(team_nl_ops));
2212 if (err)
2213 return err;
2214
2215 err = genl_register_mc_group(&team_nl_family, &team_change_event_mcgrp);
2216 if (err)
2217 goto err_change_event_grp_reg;
2218
2219 return 0;
2220
2221 err_change_event_grp_reg:
2222 genl_unregister_family(&team_nl_family);
2223
2224 return err;
2225 }
2226
2227 static void team_nl_fini(void)
2228 {
2229 genl_unregister_family(&team_nl_family);
2230 }
2231
2232
2233 /******************
2234 * Change checkers
2235 ******************/
2236
2237 static void __team_options_change_check(struct team *team)
2238 {
2239 int err;
2240 struct team_option_inst *opt_inst;
2241 LIST_HEAD(sel_opt_inst_list);
2242
2243 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2244 if (opt_inst->changed)
2245 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2246 }
2247 err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2248 if (err)
2249 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2250 err);
2251 }
2252
2253 /* rtnl lock is held */
2254 static void __team_port_change_check(struct team_port *port, bool linkup)
2255 {
2256 int err;
2257
2258 if (!port->removed && port->state.linkup == linkup)
2259 return;
2260
2261 port->changed = true;
2262 port->state.linkup = linkup;
2263 team_refresh_port_linkup(port);
2264 if (linkup) {
2265 struct ethtool_cmd ecmd;
2266
2267 err = __ethtool_get_settings(port->dev, &ecmd);
2268 if (!err) {
2269 port->state.speed = ethtool_cmd_speed(&ecmd);
2270 port->state.duplex = ecmd.duplex;
2271 goto send_event;
2272 }
2273 }
2274 port->state.speed = 0;
2275 port->state.duplex = 0;
2276
2277 send_event:
2278 err = team_nl_send_event_port_list_get(port->team);
2279 if (err)
2280 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink\n",
2281 port->dev->name);
2282
2283 }
2284
2285 static void team_port_change_check(struct team_port *port, bool linkup)
2286 {
2287 struct team *team = port->team;
2288
2289 mutex_lock(&team->lock);
2290 __team_port_change_check(port, linkup);
2291 mutex_unlock(&team->lock);
2292 }
2293
2294
2295 /************************************
2296 * Net device notifier event handler
2297 ************************************/
2298
2299 static int team_device_event(struct notifier_block *unused,
2300 unsigned long event, void *ptr)
2301 {
2302 struct net_device *dev = (struct net_device *) ptr;
2303 struct team_port *port;
2304
2305 port = team_port_get_rtnl(dev);
2306 if (!port)
2307 return NOTIFY_DONE;
2308
2309 switch (event) {
2310 case NETDEV_UP:
2311 if (netif_carrier_ok(dev))
2312 team_port_change_check(port, true);
2313 case NETDEV_DOWN:
2314 team_port_change_check(port, false);
2315 case NETDEV_CHANGE:
2316 if (netif_running(port->dev))
2317 team_port_change_check(port,
2318 !!netif_carrier_ok(port->dev));
2319 break;
2320 case NETDEV_UNREGISTER:
2321 team_del_slave(port->team->dev, dev);
2322 break;
2323 case NETDEV_FEAT_CHANGE:
2324 team_compute_features(port->team);
2325 break;
2326 case NETDEV_CHANGEMTU:
2327 /* Forbid to change mtu of underlaying device */
2328 return NOTIFY_BAD;
2329 case NETDEV_PRE_TYPE_CHANGE:
2330 /* Forbid to change type of underlaying device */
2331 return NOTIFY_BAD;
2332 }
2333 return NOTIFY_DONE;
2334 }
2335
2336 static struct notifier_block team_notifier_block __read_mostly = {
2337 .notifier_call = team_device_event,
2338 };
2339
2340
2341 /***********************
2342 * Module init and exit
2343 ***********************/
2344
2345 static int __init team_module_init(void)
2346 {
2347 int err;
2348
2349 register_netdevice_notifier(&team_notifier_block);
2350
2351 err = rtnl_link_register(&team_link_ops);
2352 if (err)
2353 goto err_rtnl_reg;
2354
2355 err = team_nl_init();
2356 if (err)
2357 goto err_nl_init;
2358
2359 return 0;
2360
2361 err_nl_init:
2362 rtnl_link_unregister(&team_link_ops);
2363
2364 err_rtnl_reg:
2365 unregister_netdevice_notifier(&team_notifier_block);
2366
2367 return err;
2368 }
2369
2370 static void __exit team_module_exit(void)
2371 {
2372 team_nl_fini();
2373 rtnl_link_unregister(&team_link_ops);
2374 unregister_netdevice_notifier(&team_notifier_block);
2375 }
2376
2377 module_init(team_module_init);
2378 module_exit(team_module_exit);
2379
2380 MODULE_LICENSE("GPL v2");
2381 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
2382 MODULE_DESCRIPTION("Ethernet team device driver");
2383 MODULE_ALIAS_RTNL_LINK(DRV_NAME);
Linux kernel - Deliverables
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