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Merge tag 'soc2' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
[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 {
800 struct netpoll *np;
801 int err;
802
803 np = kzalloc(sizeof(*np), GFP_KERNEL);
804 if (!np)
805 return -ENOMEM;
806
807 err = __netpoll_setup(np, port->dev);
808 if (err) {
809 kfree(np);
810 return err;
811 }
812 port->np = np;
813 return err;
814 }
815
816 static void team_port_disable_netpoll(struct team_port *port)
817 {
818 struct netpoll *np = port->np;
819
820 if (!np)
821 return;
822 port->np = NULL;
823
824 /* Wait for transmitting packets to finish before freeing. */
825 synchronize_rcu_bh();
826 __netpoll_cleanup(np);
827 kfree(np);
828 }
829
830 static struct netpoll_info *team_netpoll_info(struct team *team)
831 {
832 return team->dev->npinfo;
833 }
834
835 #else
836 static int team_port_enable_netpoll(struct team *team, struct team_port *port)
837 {
838 return 0;
839 }
840 static void team_port_disable_netpoll(struct team_port *port)
841 {
842 }
843 static struct netpoll_info *team_netpoll_info(struct team *team)
844 {
845 return NULL;
846 }
847 #endif
848
849 static void __team_port_change_check(struct team_port *port, bool linkup);
850
851 static int team_port_add(struct team *team, struct net_device *port_dev)
852 {
853 struct net_device *dev = team->dev;
854 struct team_port *port;
855 char *portname = port_dev->name;
856 int err;
857
858 if (port_dev->flags & IFF_LOOPBACK ||
859 port_dev->type != ARPHRD_ETHER) {
860 netdev_err(dev, "Device %s is of an unsupported type\n",
861 portname);
862 return -EINVAL;
863 }
864
865 if (team_port_exists(port_dev)) {
866 netdev_err(dev, "Device %s is already a port "
867 "of a team device\n", portname);
868 return -EBUSY;
869 }
870
871 if (port_dev->flags & IFF_UP) {
872 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
873 portname);
874 return -EBUSY;
875 }
876
877 port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
878 GFP_KERNEL);
879 if (!port)
880 return -ENOMEM;
881
882 port->dev = port_dev;
883 port->team = team;
884
885 port->orig.mtu = port_dev->mtu;
886 err = dev_set_mtu(port_dev, dev->mtu);
887 if (err) {
888 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
889 goto err_set_mtu;
890 }
891
892 memcpy(port->orig.dev_addr, port_dev->dev_addr, ETH_ALEN);
893
894 err = team_port_enter(team, port);
895 if (err) {
896 netdev_err(dev, "Device %s failed to enter team mode\n",
897 portname);
898 goto err_port_enter;
899 }
900
901 err = dev_open(port_dev);
902 if (err) {
903 netdev_dbg(dev, "Device %s opening failed\n",
904 portname);
905 goto err_dev_open;
906 }
907
908 err = vlan_vids_add_by_dev(port_dev, dev);
909 if (err) {
910 netdev_err(dev, "Failed to add vlan ids to device %s\n",
911 portname);
912 goto err_vids_add;
913 }
914
915 if (team_netpoll_info(team)) {
916 err = team_port_enable_netpoll(team, port);
917 if (err) {
918 netdev_err(dev, "Failed to enable netpoll on device %s\n",
919 portname);
920 goto err_enable_netpoll;
921 }
922 }
923
924 err = netdev_set_master(port_dev, dev);
925 if (err) {
926 netdev_err(dev, "Device %s failed to set master\n", portname);
927 goto err_set_master;
928 }
929
930 err = netdev_rx_handler_register(port_dev, team_handle_frame,
931 port);
932 if (err) {
933 netdev_err(dev, "Device %s failed to register rx_handler\n",
934 portname);
935 goto err_handler_register;
936 }
937
938 err = __team_option_inst_add_port(team, port);
939 if (err) {
940 netdev_err(dev, "Device %s failed to add per-port options\n",
941 portname);
942 goto err_option_port_add;
943 }
944
945 port->index = -1;
946 team_port_enable(team, port);
947 list_add_tail_rcu(&port->list, &team->port_list);
948 __team_compute_features(team);
949 __team_port_change_check(port, !!netif_carrier_ok(port_dev));
950 __team_options_change_check(team);
951
952 netdev_info(dev, "Port device %s added\n", portname);
953
954 return 0;
955
956 err_option_port_add:
957 netdev_rx_handler_unregister(port_dev);
958
959 err_handler_register:
960 netdev_set_master(port_dev, NULL);
961
962 err_set_master:
963 team_port_disable_netpoll(port);
964
965 err_enable_netpoll:
966 vlan_vids_del_by_dev(port_dev, dev);
967
968 err_vids_add:
969 dev_close(port_dev);
970
971 err_dev_open:
972 team_port_leave(team, port);
973 team_port_set_orig_mac(port);
974
975 err_port_enter:
976 dev_set_mtu(port_dev, port->orig.mtu);
977
978 err_set_mtu:
979 kfree(port);
980
981 return err;
982 }
983
984 static int team_port_del(struct team *team, struct net_device *port_dev)
985 {
986 struct net_device *dev = team->dev;
987 struct team_port *port;
988 char *portname = port_dev->name;
989
990 port = team_port_get_rtnl(port_dev);
991 if (!port || !team_port_find(team, port)) {
992 netdev_err(dev, "Device %s does not act as a port of this team\n",
993 portname);
994 return -ENOENT;
995 }
996
997 __team_option_inst_mark_removed_port(team, port);
998 __team_options_change_check(team);
999 __team_option_inst_del_port(team, port);
1000 port->removed = true;
1001 __team_port_change_check(port, false);
1002 team_port_disable(team, port);
1003 list_del_rcu(&port->list);
1004 netdev_rx_handler_unregister(port_dev);
1005 netdev_set_master(port_dev, NULL);
1006 team_port_disable_netpoll(port);
1007 vlan_vids_del_by_dev(port_dev, dev);
1008 dev_close(port_dev);
1009 team_port_leave(team, port);
1010 team_port_set_orig_mac(port);
1011 dev_set_mtu(port_dev, port->orig.mtu);
1012 synchronize_rcu();
1013 kfree(port);
1014 netdev_info(dev, "Port device %s removed\n", portname);
1015 __team_compute_features(team);
1016
1017 return 0;
1018 }
1019
1020
1021 /*****************
1022 * Net device ops
1023 *****************/
1024
1025 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1026 {
1027 ctx->data.str_val = team->mode->kind;
1028 return 0;
1029 }
1030
1031 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1032 {
1033 return team_change_mode(team, ctx->data.str_val);
1034 }
1035
1036 static int team_port_en_option_get(struct team *team,
1037 struct team_gsetter_ctx *ctx)
1038 {
1039 struct team_port *port = ctx->info->port;
1040
1041 ctx->data.bool_val = team_port_enabled(port);
1042 return 0;
1043 }
1044
1045 static int team_port_en_option_set(struct team *team,
1046 struct team_gsetter_ctx *ctx)
1047 {
1048 struct team_port *port = ctx->info->port;
1049
1050 if (ctx->data.bool_val)
1051 team_port_enable(team, port);
1052 else
1053 team_port_disable(team, port);
1054 return 0;
1055 }
1056
1057 static int team_user_linkup_option_get(struct team *team,
1058 struct team_gsetter_ctx *ctx)
1059 {
1060 struct team_port *port = ctx->info->port;
1061
1062 ctx->data.bool_val = port->user.linkup;
1063 return 0;
1064 }
1065
1066 static int team_user_linkup_option_set(struct team *team,
1067 struct team_gsetter_ctx *ctx)
1068 {
1069 struct team_port *port = ctx->info->port;
1070
1071 port->user.linkup = ctx->data.bool_val;
1072 team_refresh_port_linkup(port);
1073 return 0;
1074 }
1075
1076 static int team_user_linkup_en_option_get(struct team *team,
1077 struct team_gsetter_ctx *ctx)
1078 {
1079 struct team_port *port = ctx->info->port;
1080
1081 ctx->data.bool_val = port->user.linkup_enabled;
1082 return 0;
1083 }
1084
1085 static int team_user_linkup_en_option_set(struct team *team,
1086 struct team_gsetter_ctx *ctx)
1087 {
1088 struct team_port *port = ctx->info->port;
1089
1090 port->user.linkup_enabled = ctx->data.bool_val;
1091 team_refresh_port_linkup(port);
1092 return 0;
1093 }
1094
1095 static const struct team_option team_options[] = {
1096 {
1097 .name = "mode",
1098 .type = TEAM_OPTION_TYPE_STRING,
1099 .getter = team_mode_option_get,
1100 .setter = team_mode_option_set,
1101 },
1102 {
1103 .name = "enabled",
1104 .type = TEAM_OPTION_TYPE_BOOL,
1105 .per_port = true,
1106 .getter = team_port_en_option_get,
1107 .setter = team_port_en_option_set,
1108 },
1109 {
1110 .name = "user_linkup",
1111 .type = TEAM_OPTION_TYPE_BOOL,
1112 .per_port = true,
1113 .getter = team_user_linkup_option_get,
1114 .setter = team_user_linkup_option_set,
1115 },
1116 {
1117 .name = "user_linkup_enabled",
1118 .type = TEAM_OPTION_TYPE_BOOL,
1119 .per_port = true,
1120 .getter = team_user_linkup_en_option_get,
1121 .setter = team_user_linkup_en_option_set,
1122 },
1123 };
1124
1125 static struct lock_class_key team_netdev_xmit_lock_key;
1126 static struct lock_class_key team_netdev_addr_lock_key;
1127
1128 static void team_set_lockdep_class_one(struct net_device *dev,
1129 struct netdev_queue *txq,
1130 void *unused)
1131 {
1132 lockdep_set_class(&txq->_xmit_lock, &team_netdev_xmit_lock_key);
1133 }
1134
1135 static void team_set_lockdep_class(struct net_device *dev)
1136 {
1137 lockdep_set_class(&dev->addr_list_lock, &team_netdev_addr_lock_key);
1138 netdev_for_each_tx_queue(dev, team_set_lockdep_class_one, NULL);
1139 }
1140
1141 static int team_init(struct net_device *dev)
1142 {
1143 struct team *team = netdev_priv(dev);
1144 int i;
1145 int err;
1146
1147 team->dev = dev;
1148 mutex_init(&team->lock);
1149 team_set_no_mode(team);
1150
1151 team->pcpu_stats = alloc_percpu(struct team_pcpu_stats);
1152 if (!team->pcpu_stats)
1153 return -ENOMEM;
1154
1155 for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1156 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1157 INIT_LIST_HEAD(&team->port_list);
1158
1159 team_adjust_ops(team);
1160
1161 INIT_LIST_HEAD(&team->option_list);
1162 INIT_LIST_HEAD(&team->option_inst_list);
1163 err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1164 if (err)
1165 goto err_options_register;
1166 netif_carrier_off(dev);
1167
1168 team_set_lockdep_class(dev);
1169
1170 return 0;
1171
1172 err_options_register:
1173 free_percpu(team->pcpu_stats);
1174
1175 return err;
1176 }
1177
1178 static void team_uninit(struct net_device *dev)
1179 {
1180 struct team *team = netdev_priv(dev);
1181 struct team_port *port;
1182 struct team_port *tmp;
1183
1184 mutex_lock(&team->lock);
1185 list_for_each_entry_safe(port, tmp, &team->port_list, list)
1186 team_port_del(team, port->dev);
1187
1188 __team_change_mode(team, NULL); /* cleanup */
1189 __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1190 mutex_unlock(&team->lock);
1191 }
1192
1193 static void team_destructor(struct net_device *dev)
1194 {
1195 struct team *team = netdev_priv(dev);
1196
1197 free_percpu(team->pcpu_stats);
1198 free_netdev(dev);
1199 }
1200
1201 static int team_open(struct net_device *dev)
1202 {
1203 netif_carrier_on(dev);
1204 return 0;
1205 }
1206
1207 static int team_close(struct net_device *dev)
1208 {
1209 netif_carrier_off(dev);
1210 return 0;
1211 }
1212
1213 /*
1214 * note: already called with rcu_read_lock
1215 */
1216 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1217 {
1218 struct team *team = netdev_priv(dev);
1219 bool tx_success = false;
1220 unsigned int len = skb->len;
1221
1222 tx_success = team->ops.transmit(team, skb);
1223 if (tx_success) {
1224 struct team_pcpu_stats *pcpu_stats;
1225
1226 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1227 u64_stats_update_begin(&pcpu_stats->syncp);
1228 pcpu_stats->tx_packets++;
1229 pcpu_stats->tx_bytes += len;
1230 u64_stats_update_end(&pcpu_stats->syncp);
1231 } else {
1232 this_cpu_inc(team->pcpu_stats->tx_dropped);
1233 }
1234
1235 return NETDEV_TX_OK;
1236 }
1237
1238 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb)
1239 {
1240 /*
1241 * This helper function exists to help dev_pick_tx get the correct
1242 * destination queue. Using a helper function skips a call to
1243 * skb_tx_hash and will put the skbs in the queue we expect on their
1244 * way down to the team driver.
1245 */
1246 u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1247
1248 /*
1249 * Save the original txq to restore before passing to the driver
1250 */
1251 qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1252
1253 if (unlikely(txq >= dev->real_num_tx_queues)) {
1254 do {
1255 txq -= dev->real_num_tx_queues;
1256 } while (txq >= dev->real_num_tx_queues);
1257 }
1258 return txq;
1259 }
1260
1261 static void team_change_rx_flags(struct net_device *dev, int change)
1262 {
1263 struct team *team = netdev_priv(dev);
1264 struct team_port *port;
1265 int inc;
1266
1267 rcu_read_lock();
1268 list_for_each_entry_rcu(port, &team->port_list, list) {
1269 if (change & IFF_PROMISC) {
1270 inc = dev->flags & IFF_PROMISC ? 1 : -1;
1271 dev_set_promiscuity(port->dev, inc);
1272 }
1273 if (change & IFF_ALLMULTI) {
1274 inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1275 dev_set_allmulti(port->dev, inc);
1276 }
1277 }
1278 rcu_read_unlock();
1279 }
1280
1281 static void team_set_rx_mode(struct net_device *dev)
1282 {
1283 struct team *team = netdev_priv(dev);
1284 struct team_port *port;
1285
1286 rcu_read_lock();
1287 list_for_each_entry_rcu(port, &team->port_list, list) {
1288 dev_uc_sync(port->dev, dev);
1289 dev_mc_sync(port->dev, dev);
1290 }
1291 rcu_read_unlock();
1292 }
1293
1294 static int team_set_mac_address(struct net_device *dev, void *p)
1295 {
1296 struct team *team = netdev_priv(dev);
1297 struct team_port *port;
1298 int err;
1299
1300 err = eth_mac_addr(dev, p);
1301 if (err)
1302 return err;
1303 rcu_read_lock();
1304 list_for_each_entry_rcu(port, &team->port_list, list)
1305 if (team->ops.port_change_mac)
1306 team->ops.port_change_mac(team, port);
1307 rcu_read_unlock();
1308 return 0;
1309 }
1310
1311 static int team_change_mtu(struct net_device *dev, int new_mtu)
1312 {
1313 struct team *team = netdev_priv(dev);
1314 struct team_port *port;
1315 int err;
1316
1317 /*
1318 * Alhough this is reader, it's guarded by team lock. It's not possible
1319 * to traverse list in reverse under rcu_read_lock
1320 */
1321 mutex_lock(&team->lock);
1322 list_for_each_entry(port, &team->port_list, list) {
1323 err = dev_set_mtu(port->dev, new_mtu);
1324 if (err) {
1325 netdev_err(dev, "Device %s failed to change mtu",
1326 port->dev->name);
1327 goto unwind;
1328 }
1329 }
1330 mutex_unlock(&team->lock);
1331
1332 dev->mtu = new_mtu;
1333
1334 return 0;
1335
1336 unwind:
1337 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1338 dev_set_mtu(port->dev, dev->mtu);
1339 mutex_unlock(&team->lock);
1340
1341 return err;
1342 }
1343
1344 static struct rtnl_link_stats64 *
1345 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1346 {
1347 struct team *team = netdev_priv(dev);
1348 struct team_pcpu_stats *p;
1349 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1350 u32 rx_dropped = 0, tx_dropped = 0;
1351 unsigned int start;
1352 int i;
1353
1354 for_each_possible_cpu(i) {
1355 p = per_cpu_ptr(team->pcpu_stats, i);
1356 do {
1357 start = u64_stats_fetch_begin_bh(&p->syncp);
1358 rx_packets = p->rx_packets;
1359 rx_bytes = p->rx_bytes;
1360 rx_multicast = p->rx_multicast;
1361 tx_packets = p->tx_packets;
1362 tx_bytes = p->tx_bytes;
1363 } while (u64_stats_fetch_retry_bh(&p->syncp, start));
1364
1365 stats->rx_packets += rx_packets;
1366 stats->rx_bytes += rx_bytes;
1367 stats->multicast += rx_multicast;
1368 stats->tx_packets += tx_packets;
1369 stats->tx_bytes += tx_bytes;
1370 /*
1371 * rx_dropped & tx_dropped are u32, updated
1372 * without syncp protection.
1373 */
1374 rx_dropped += p->rx_dropped;
1375 tx_dropped += p->tx_dropped;
1376 }
1377 stats->rx_dropped = rx_dropped;
1378 stats->tx_dropped = tx_dropped;
1379 return stats;
1380 }
1381
1382 static int team_vlan_rx_add_vid(struct net_device *dev, uint16_t vid)
1383 {
1384 struct team *team = netdev_priv(dev);
1385 struct team_port *port;
1386 int err;
1387
1388 /*
1389 * Alhough this is reader, it's guarded by team lock. It's not possible
1390 * to traverse list in reverse under rcu_read_lock
1391 */
1392 mutex_lock(&team->lock);
1393 list_for_each_entry(port, &team->port_list, list) {
1394 err = vlan_vid_add(port->dev, vid);
1395 if (err)
1396 goto unwind;
1397 }
1398 mutex_unlock(&team->lock);
1399
1400 return 0;
1401
1402 unwind:
1403 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1404 vlan_vid_del(port->dev, vid);
1405 mutex_unlock(&team->lock);
1406
1407 return err;
1408 }
1409
1410 static int team_vlan_rx_kill_vid(struct net_device *dev, uint16_t vid)
1411 {
1412 struct team *team = netdev_priv(dev);
1413 struct team_port *port;
1414
1415 rcu_read_lock();
1416 list_for_each_entry_rcu(port, &team->port_list, list)
1417 vlan_vid_del(port->dev, vid);
1418 rcu_read_unlock();
1419
1420 return 0;
1421 }
1422
1423 #ifdef CONFIG_NET_POLL_CONTROLLER
1424 static void team_poll_controller(struct net_device *dev)
1425 {
1426 }
1427
1428 static void __team_netpoll_cleanup(struct team *team)
1429 {
1430 struct team_port *port;
1431
1432 list_for_each_entry(port, &team->port_list, list)
1433 team_port_disable_netpoll(port);
1434 }
1435
1436 static void team_netpoll_cleanup(struct net_device *dev)
1437 {
1438 struct team *team = netdev_priv(dev);
1439
1440 mutex_lock(&team->lock);
1441 __team_netpoll_cleanup(team);
1442 mutex_unlock(&team->lock);
1443 }
1444
1445 static int team_netpoll_setup(struct net_device *dev,
1446 struct netpoll_info *npifo)
1447 {
1448 struct team *team = netdev_priv(dev);
1449 struct team_port *port;
1450 int err = 0;
1451
1452 mutex_lock(&team->lock);
1453 list_for_each_entry(port, &team->port_list, list) {
1454 err = team_port_enable_netpoll(team, port);
1455 if (err) {
1456 __team_netpoll_cleanup(team);
1457 break;
1458 }
1459 }
1460 mutex_unlock(&team->lock);
1461 return err;
1462 }
1463 #endif
1464
1465 static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
1466 {
1467 struct team *team = netdev_priv(dev);
1468 int err;
1469
1470 mutex_lock(&team->lock);
1471 err = team_port_add(team, port_dev);
1472 mutex_unlock(&team->lock);
1473 return err;
1474 }
1475
1476 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1477 {
1478 struct team *team = netdev_priv(dev);
1479 int err;
1480
1481 mutex_lock(&team->lock);
1482 err = team_port_del(team, port_dev);
1483 mutex_unlock(&team->lock);
1484 return err;
1485 }
1486
1487 static netdev_features_t team_fix_features(struct net_device *dev,
1488 netdev_features_t features)
1489 {
1490 struct team_port *port;
1491 struct team *team = netdev_priv(dev);
1492 netdev_features_t mask;
1493
1494 mask = features;
1495 features &= ~NETIF_F_ONE_FOR_ALL;
1496 features |= NETIF_F_ALL_FOR_ALL;
1497
1498 rcu_read_lock();
1499 list_for_each_entry_rcu(port, &team->port_list, list) {
1500 features = netdev_increment_features(features,
1501 port->dev->features,
1502 mask);
1503 }
1504 rcu_read_unlock();
1505 return features;
1506 }
1507
1508 static const struct net_device_ops team_netdev_ops = {
1509 .ndo_init = team_init,
1510 .ndo_uninit = team_uninit,
1511 .ndo_open = team_open,
1512 .ndo_stop = team_close,
1513 .ndo_start_xmit = team_xmit,
1514 .ndo_select_queue = team_select_queue,
1515 .ndo_change_rx_flags = team_change_rx_flags,
1516 .ndo_set_rx_mode = team_set_rx_mode,
1517 .ndo_set_mac_address = team_set_mac_address,
1518 .ndo_change_mtu = team_change_mtu,
1519 .ndo_get_stats64 = team_get_stats64,
1520 .ndo_vlan_rx_add_vid = team_vlan_rx_add_vid,
1521 .ndo_vlan_rx_kill_vid = team_vlan_rx_kill_vid,
1522 #ifdef CONFIG_NET_POLL_CONTROLLER
1523 .ndo_poll_controller = team_poll_controller,
1524 .ndo_netpoll_setup = team_netpoll_setup,
1525 .ndo_netpoll_cleanup = team_netpoll_cleanup,
1526 #endif
1527 .ndo_add_slave = team_add_slave,
1528 .ndo_del_slave = team_del_slave,
1529 .ndo_fix_features = team_fix_features,
1530 };
1531
1532
1533 /***********************
1534 * rt netlink interface
1535 ***********************/
1536
1537 static void team_setup(struct net_device *dev)
1538 {
1539 ether_setup(dev);
1540
1541 dev->netdev_ops = &team_netdev_ops;
1542 dev->destructor = team_destructor;
1543 dev->tx_queue_len = 0;
1544 dev->flags |= IFF_MULTICAST;
1545 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
1546
1547 /*
1548 * Indicate we support unicast address filtering. That way core won't
1549 * bring us to promisc mode in case a unicast addr is added.
1550 * Let this up to underlay drivers.
1551 */
1552 dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
1553
1554 dev->features |= NETIF_F_LLTX;
1555 dev->features |= NETIF_F_GRO;
1556 dev->hw_features = NETIF_F_HW_VLAN_TX |
1557 NETIF_F_HW_VLAN_RX |
1558 NETIF_F_HW_VLAN_FILTER;
1559
1560 dev->features |= dev->hw_features;
1561 }
1562
1563 static int team_newlink(struct net *src_net, struct net_device *dev,
1564 struct nlattr *tb[], struct nlattr *data[])
1565 {
1566 int err;
1567
1568 if (tb[IFLA_ADDRESS] == NULL)
1569 eth_hw_addr_random(dev);
1570
1571 err = register_netdevice(dev);
1572 if (err)
1573 return err;
1574
1575 return 0;
1576 }
1577
1578 static int team_validate(struct nlattr *tb[], struct nlattr *data[])
1579 {
1580 if (tb[IFLA_ADDRESS]) {
1581 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
1582 return -EINVAL;
1583 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
1584 return -EADDRNOTAVAIL;
1585 }
1586 return 0;
1587 }
1588
1589 static unsigned int team_get_num_tx_queues(void)
1590 {
1591 return TEAM_DEFAULT_NUM_TX_QUEUES;
1592 }
1593
1594 static unsigned int team_get_num_rx_queues(void)
1595 {
1596 return TEAM_DEFAULT_NUM_RX_QUEUES;
1597 }
1598
1599 static struct rtnl_link_ops team_link_ops __read_mostly = {
1600 .kind = DRV_NAME,
1601 .priv_size = sizeof(struct team),
1602 .setup = team_setup,
1603 .newlink = team_newlink,
1604 .validate = team_validate,
1605 .get_num_tx_queues = team_get_num_tx_queues,
1606 .get_num_rx_queues = team_get_num_rx_queues,
1607 };
1608
1609
1610 /***********************************
1611 * Generic netlink custom interface
1612 ***********************************/
1613
1614 static struct genl_family team_nl_family = {
1615 .id = GENL_ID_GENERATE,
1616 .name = TEAM_GENL_NAME,
1617 .version = TEAM_GENL_VERSION,
1618 .maxattr = TEAM_ATTR_MAX,
1619 .netnsok = true,
1620 };
1621
1622 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
1623 [TEAM_ATTR_UNSPEC] = { .type = NLA_UNSPEC, },
1624 [TEAM_ATTR_TEAM_IFINDEX] = { .type = NLA_U32 },
1625 [TEAM_ATTR_LIST_OPTION] = { .type = NLA_NESTED },
1626 [TEAM_ATTR_LIST_PORT] = { .type = NLA_NESTED },
1627 };
1628
1629 static const struct nla_policy
1630 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
1631 [TEAM_ATTR_OPTION_UNSPEC] = { .type = NLA_UNSPEC, },
1632 [TEAM_ATTR_OPTION_NAME] = {
1633 .type = NLA_STRING,
1634 .len = TEAM_STRING_MAX_LEN,
1635 },
1636 [TEAM_ATTR_OPTION_CHANGED] = { .type = NLA_FLAG },
1637 [TEAM_ATTR_OPTION_TYPE] = { .type = NLA_U8 },
1638 [TEAM_ATTR_OPTION_DATA] = { .type = NLA_BINARY },
1639 };
1640
1641 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
1642 {
1643 struct sk_buff *msg;
1644 void *hdr;
1645 int err;
1646
1647 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1648 if (!msg)
1649 return -ENOMEM;
1650
1651 hdr = genlmsg_put(msg, info->snd_pid, info->snd_seq,
1652 &team_nl_family, 0, TEAM_CMD_NOOP);
1653 if (IS_ERR(hdr)) {
1654 err = PTR_ERR(hdr);
1655 goto err_msg_put;
1656 }
1657
1658 genlmsg_end(msg, hdr);
1659
1660 return genlmsg_unicast(genl_info_net(info), msg, info->snd_pid);
1661
1662 err_msg_put:
1663 nlmsg_free(msg);
1664
1665 return err;
1666 }
1667
1668 /*
1669 * Netlink cmd functions should be locked by following two functions.
1670 * Since dev gets held here, that ensures dev won't disappear in between.
1671 */
1672 static struct team *team_nl_team_get(struct genl_info *info)
1673 {
1674 struct net *net = genl_info_net(info);
1675 int ifindex;
1676 struct net_device *dev;
1677 struct team *team;
1678
1679 if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
1680 return NULL;
1681
1682 ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
1683 dev = dev_get_by_index(net, ifindex);
1684 if (!dev || dev->netdev_ops != &team_netdev_ops) {
1685 if (dev)
1686 dev_put(dev);
1687 return NULL;
1688 }
1689
1690 team = netdev_priv(dev);
1691 mutex_lock(&team->lock);
1692 return team;
1693 }
1694
1695 static void team_nl_team_put(struct team *team)
1696 {
1697 mutex_unlock(&team->lock);
1698 dev_put(team->dev);
1699 }
1700
1701 static int team_nl_send_generic(struct genl_info *info, struct team *team,
1702 int (*fill_func)(struct sk_buff *skb,
1703 struct genl_info *info,
1704 int flags, struct team *team))
1705 {
1706 struct sk_buff *skb;
1707 int err;
1708
1709 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1710 if (!skb)
1711 return -ENOMEM;
1712
1713 err = fill_func(skb, info, NLM_F_ACK, team);
1714 if (err < 0)
1715 goto err_fill;
1716
1717 err = genlmsg_unicast(genl_info_net(info), skb, info->snd_pid);
1718 return err;
1719
1720 err_fill:
1721 nlmsg_free(skb);
1722 return err;
1723 }
1724
1725 typedef int team_nl_send_func_t(struct sk_buff *skb,
1726 struct team *team, u32 pid);
1727
1728 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 pid)
1729 {
1730 return genlmsg_unicast(dev_net(team->dev), skb, pid);
1731 }
1732
1733 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
1734 struct team_option_inst *opt_inst)
1735 {
1736 struct nlattr *option_item;
1737 struct team_option *option = opt_inst->option;
1738 struct team_option_inst_info *opt_inst_info = &opt_inst->info;
1739 struct team_gsetter_ctx ctx;
1740 int err;
1741
1742 ctx.info = opt_inst_info;
1743 err = team_option_get(team, opt_inst, &ctx);
1744 if (err)
1745 return err;
1746
1747 option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
1748 if (!option_item)
1749 return -EMSGSIZE;
1750
1751 if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
1752 goto nest_cancel;
1753 if (opt_inst_info->port &&
1754 nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
1755 opt_inst_info->port->dev->ifindex))
1756 goto nest_cancel;
1757 if (opt_inst->option->array_size &&
1758 nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
1759 opt_inst_info->array_index))
1760 goto nest_cancel;
1761
1762 switch (option->type) {
1763 case TEAM_OPTION_TYPE_U32:
1764 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
1765 goto nest_cancel;
1766 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
1767 goto nest_cancel;
1768 break;
1769 case TEAM_OPTION_TYPE_STRING:
1770 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
1771 goto nest_cancel;
1772 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
1773 ctx.data.str_val))
1774 goto nest_cancel;
1775 break;
1776 case TEAM_OPTION_TYPE_BINARY:
1777 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
1778 goto nest_cancel;
1779 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
1780 ctx.data.bin_val.ptr))
1781 goto nest_cancel;
1782 break;
1783 case TEAM_OPTION_TYPE_BOOL:
1784 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
1785 goto nest_cancel;
1786 if (ctx.data.bool_val &&
1787 nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
1788 goto nest_cancel;
1789 break;
1790 default:
1791 BUG();
1792 }
1793 if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
1794 goto nest_cancel;
1795 if (opt_inst->changed) {
1796 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
1797 goto nest_cancel;
1798 opt_inst->changed = false;
1799 }
1800 nla_nest_end(skb, option_item);
1801 return 0;
1802
1803 nest_cancel:
1804 nla_nest_cancel(skb, option_item);
1805 return -EMSGSIZE;
1806 }
1807
1808 static int __send_and_alloc_skb(struct sk_buff **pskb,
1809 struct team *team, u32 pid,
1810 team_nl_send_func_t *send_func)
1811 {
1812 int err;
1813
1814 if (*pskb) {
1815 err = send_func(*pskb, team, pid);
1816 if (err)
1817 return err;
1818 }
1819 *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
1820 if (!*pskb)
1821 return -ENOMEM;
1822 return 0;
1823 }
1824
1825 static int team_nl_send_options_get(struct team *team, u32 pid, u32 seq,
1826 int flags, team_nl_send_func_t *send_func,
1827 struct list_head *sel_opt_inst_list)
1828 {
1829 struct nlattr *option_list;
1830 struct nlmsghdr *nlh;
1831 void *hdr;
1832 struct team_option_inst *opt_inst;
1833 int err;
1834 struct sk_buff *skb = NULL;
1835 bool incomplete;
1836 int i;
1837
1838 opt_inst = list_first_entry(sel_opt_inst_list,
1839 struct team_option_inst, tmp_list);
1840
1841 start_again:
1842 err = __send_and_alloc_skb(&skb, team, pid, send_func);
1843 if (err)
1844 return err;
1845
1846 hdr = genlmsg_put(skb, pid, seq, &team_nl_family, flags | NLM_F_MULTI,
1847 TEAM_CMD_OPTIONS_GET);
1848 if (IS_ERR(hdr))
1849 return PTR_ERR(hdr);
1850
1851 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
1852 goto nla_put_failure;
1853 option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
1854 if (!option_list)
1855 goto nla_put_failure;
1856
1857 i = 0;
1858 incomplete = false;
1859 list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
1860 err = team_nl_fill_one_option_get(skb, team, opt_inst);
1861 if (err) {
1862 if (err == -EMSGSIZE) {
1863 if (!i)
1864 goto errout;
1865 incomplete = true;
1866 break;
1867 }
1868 goto errout;
1869 }
1870 i++;
1871 }
1872
1873 nla_nest_end(skb, option_list);
1874 genlmsg_end(skb, hdr);
1875 if (incomplete)
1876 goto start_again;
1877
1878 send_done:
1879 nlh = nlmsg_put(skb, pid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
1880 if (!nlh) {
1881 err = __send_and_alloc_skb(&skb, team, pid, send_func);
1882 if (err)
1883 goto errout;
1884 goto send_done;
1885 }
1886
1887 return send_func(skb, team, pid);
1888
1889 nla_put_failure:
1890 err = -EMSGSIZE;
1891 errout:
1892 genlmsg_cancel(skb, hdr);
1893 nlmsg_free(skb);
1894 return err;
1895 }
1896
1897 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
1898 {
1899 struct team *team;
1900 struct team_option_inst *opt_inst;
1901 int err;
1902 LIST_HEAD(sel_opt_inst_list);
1903
1904 team = team_nl_team_get(info);
1905 if (!team)
1906 return -EINVAL;
1907
1908 list_for_each_entry(opt_inst, &team->option_inst_list, list)
1909 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
1910 err = team_nl_send_options_get(team, info->snd_pid, info->snd_seq,
1911 NLM_F_ACK, team_nl_send_unicast,
1912 &sel_opt_inst_list);
1913
1914 team_nl_team_put(team);
1915
1916 return err;
1917 }
1918
1919 static int team_nl_send_event_options_get(struct team *team,
1920 struct list_head *sel_opt_inst_list);
1921
1922 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
1923 {
1924 struct team *team;
1925 int err = 0;
1926 int i;
1927 struct nlattr *nl_option;
1928 LIST_HEAD(opt_inst_list);
1929
1930 team = team_nl_team_get(info);
1931 if (!team)
1932 return -EINVAL;
1933
1934 err = -EINVAL;
1935 if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
1936 err = -EINVAL;
1937 goto team_put;
1938 }
1939
1940 nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
1941 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
1942 struct nlattr *attr;
1943 struct nlattr *attr_data;
1944 enum team_option_type opt_type;
1945 int opt_port_ifindex = 0; /* != 0 for per-port options */
1946 u32 opt_array_index = 0;
1947 bool opt_is_array = false;
1948 struct team_option_inst *opt_inst;
1949 char *opt_name;
1950 bool opt_found = false;
1951
1952 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
1953 err = -EINVAL;
1954 goto team_put;
1955 }
1956 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
1957 nl_option, team_nl_option_policy);
1958 if (err)
1959 goto team_put;
1960 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
1961 !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
1962 err = -EINVAL;
1963 goto team_put;
1964 }
1965 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
1966 case NLA_U32:
1967 opt_type = TEAM_OPTION_TYPE_U32;
1968 break;
1969 case NLA_STRING:
1970 opt_type = TEAM_OPTION_TYPE_STRING;
1971 break;
1972 case NLA_BINARY:
1973 opt_type = TEAM_OPTION_TYPE_BINARY;
1974 break;
1975 case NLA_FLAG:
1976 opt_type = TEAM_OPTION_TYPE_BOOL;
1977 break;
1978 default:
1979 goto team_put;
1980 }
1981
1982 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
1983 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
1984 err = -EINVAL;
1985 goto team_put;
1986 }
1987
1988 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
1989 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
1990 if (attr)
1991 opt_port_ifindex = nla_get_u32(attr);
1992
1993 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
1994 if (attr) {
1995 opt_is_array = true;
1996 opt_array_index = nla_get_u32(attr);
1997 }
1998
1999 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2000 struct team_option *option = opt_inst->option;
2001 struct team_gsetter_ctx ctx;
2002 struct team_option_inst_info *opt_inst_info;
2003 int tmp_ifindex;
2004
2005 opt_inst_info = &opt_inst->info;
2006 tmp_ifindex = opt_inst_info->port ?
2007 opt_inst_info->port->dev->ifindex : 0;
2008 if (option->type != opt_type ||
2009 strcmp(option->name, opt_name) ||
2010 tmp_ifindex != opt_port_ifindex ||
2011 (option->array_size && !opt_is_array) ||
2012 opt_inst_info->array_index != opt_array_index)
2013 continue;
2014 opt_found = true;
2015 ctx.info = opt_inst_info;
2016 switch (opt_type) {
2017 case TEAM_OPTION_TYPE_U32:
2018 ctx.data.u32_val = nla_get_u32(attr_data);
2019 break;
2020 case TEAM_OPTION_TYPE_STRING:
2021 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2022 err = -EINVAL;
2023 goto team_put;
2024 }
2025 ctx.data.str_val = nla_data(attr_data);
2026 break;
2027 case TEAM_OPTION_TYPE_BINARY:
2028 ctx.data.bin_val.len = nla_len(attr_data);
2029 ctx.data.bin_val.ptr = nla_data(attr_data);
2030 break;
2031 case TEAM_OPTION_TYPE_BOOL:
2032 ctx.data.bool_val = attr_data ? true : false;
2033 break;
2034 default:
2035 BUG();
2036 }
2037 err = team_option_set(team, opt_inst, &ctx);
2038 if (err)
2039 goto team_put;
2040 opt_inst->changed = true;
2041 list_add(&opt_inst->tmp_list, &opt_inst_list);
2042 }
2043 if (!opt_found) {
2044 err = -ENOENT;
2045 goto team_put;
2046 }
2047 }
2048
2049 err = team_nl_send_event_options_get(team, &opt_inst_list);
2050
2051 team_put:
2052 team_nl_team_put(team);
2053
2054 return err;
2055 }
2056
2057 static int team_nl_fill_port_list_get(struct sk_buff *skb,
2058 u32 pid, u32 seq, int flags,
2059 struct team *team,
2060 bool fillall)
2061 {
2062 struct nlattr *port_list;
2063 void *hdr;
2064 struct team_port *port;
2065
2066 hdr = genlmsg_put(skb, pid, seq, &team_nl_family, flags,
2067 TEAM_CMD_PORT_LIST_GET);
2068 if (IS_ERR(hdr))
2069 return PTR_ERR(hdr);
2070
2071 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2072 goto nla_put_failure;
2073 port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2074 if (!port_list)
2075 goto nla_put_failure;
2076
2077 list_for_each_entry(port, &team->port_list, list) {
2078 struct nlattr *port_item;
2079
2080 /* Include only changed ports if fill all mode is not on */
2081 if (!fillall && !port->changed)
2082 continue;
2083 port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2084 if (!port_item)
2085 goto nla_put_failure;
2086 if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2087 goto nla_put_failure;
2088 if (port->changed) {
2089 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2090 goto nla_put_failure;
2091 port->changed = false;
2092 }
2093 if ((port->removed &&
2094 nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2095 (port->state.linkup &&
2096 nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2097 nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2098 nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2099 goto nla_put_failure;
2100 nla_nest_end(skb, port_item);
2101 }
2102
2103 nla_nest_end(skb, port_list);
2104 return genlmsg_end(skb, hdr);
2105
2106 nla_put_failure:
2107 genlmsg_cancel(skb, hdr);
2108 return -EMSGSIZE;
2109 }
2110
2111 static int team_nl_fill_port_list_get_all(struct sk_buff *skb,
2112 struct genl_info *info, int flags,
2113 struct team *team)
2114 {
2115 return team_nl_fill_port_list_get(skb, info->snd_pid,
2116 info->snd_seq, NLM_F_ACK,
2117 team, true);
2118 }
2119
2120 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2121 struct genl_info *info)
2122 {
2123 struct team *team;
2124 int err;
2125
2126 team = team_nl_team_get(info);
2127 if (!team)
2128 return -EINVAL;
2129
2130 err = team_nl_send_generic(info, team, team_nl_fill_port_list_get_all);
2131
2132 team_nl_team_put(team);
2133
2134 return err;
2135 }
2136
2137 static struct genl_ops team_nl_ops[] = {
2138 {
2139 .cmd = TEAM_CMD_NOOP,
2140 .doit = team_nl_cmd_noop,
2141 .policy = team_nl_policy,
2142 },
2143 {
2144 .cmd = TEAM_CMD_OPTIONS_SET,
2145 .doit = team_nl_cmd_options_set,
2146 .policy = team_nl_policy,
2147 .flags = GENL_ADMIN_PERM,
2148 },
2149 {
2150 .cmd = TEAM_CMD_OPTIONS_GET,
2151 .doit = team_nl_cmd_options_get,
2152 .policy = team_nl_policy,
2153 .flags = GENL_ADMIN_PERM,
2154 },
2155 {
2156 .cmd = TEAM_CMD_PORT_LIST_GET,
2157 .doit = team_nl_cmd_port_list_get,
2158 .policy = team_nl_policy,
2159 .flags = GENL_ADMIN_PERM,
2160 },
2161 };
2162
2163 static struct genl_multicast_group team_change_event_mcgrp = {
2164 .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME,
2165 };
2166
2167 static int team_nl_send_multicast(struct sk_buff *skb,
2168 struct team *team, u32 pid)
2169 {
2170 return genlmsg_multicast_netns(dev_net(team->dev), skb, 0,
2171 team_change_event_mcgrp.id, GFP_KERNEL);
2172 }
2173
2174 static int team_nl_send_event_options_get(struct team *team,
2175 struct list_head *sel_opt_inst_list)
2176 {
2177 return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2178 sel_opt_inst_list);
2179 }
2180
2181 static int team_nl_send_event_port_list_get(struct team *team)
2182 {
2183 struct sk_buff *skb;
2184 int err;
2185 struct net *net = dev_net(team->dev);
2186
2187 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2188 if (!skb)
2189 return -ENOMEM;
2190
2191 err = team_nl_fill_port_list_get(skb, 0, 0, 0, team, false);
2192 if (err < 0)
2193 goto err_fill;
2194
2195 err = genlmsg_multicast_netns(net, skb, 0, team_change_event_mcgrp.id,
2196 GFP_KERNEL);
2197 return err;
2198
2199 err_fill:
2200 nlmsg_free(skb);
2201 return err;
2202 }
2203
2204 static int team_nl_init(void)
2205 {
2206 int err;
2207
2208 err = genl_register_family_with_ops(&team_nl_family, team_nl_ops,
2209 ARRAY_SIZE(team_nl_ops));
2210 if (err)
2211 return err;
2212
2213 err = genl_register_mc_group(&team_nl_family, &team_change_event_mcgrp);
2214 if (err)
2215 goto err_change_event_grp_reg;
2216
2217 return 0;
2218
2219 err_change_event_grp_reg:
2220 genl_unregister_family(&team_nl_family);
2221
2222 return err;
2223 }
2224
2225 static void team_nl_fini(void)
2226 {
2227 genl_unregister_family(&team_nl_family);
2228 }
2229
2230
2231 /******************
2232 * Change checkers
2233 ******************/
2234
2235 static void __team_options_change_check(struct team *team)
2236 {
2237 int err;
2238 struct team_option_inst *opt_inst;
2239 LIST_HEAD(sel_opt_inst_list);
2240
2241 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2242 if (opt_inst->changed)
2243 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2244 }
2245 err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2246 if (err)
2247 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2248 err);
2249 }
2250
2251 /* rtnl lock is held */
2252 static void __team_port_change_check(struct team_port *port, bool linkup)
2253 {
2254 int err;
2255
2256 if (!port->removed && port->state.linkup == linkup)
2257 return;
2258
2259 port->changed = true;
2260 port->state.linkup = linkup;
2261 team_refresh_port_linkup(port);
2262 if (linkup) {
2263 struct ethtool_cmd ecmd;
2264
2265 err = __ethtool_get_settings(port->dev, &ecmd);
2266 if (!err) {
2267 port->state.speed = ethtool_cmd_speed(&ecmd);
2268 port->state.duplex = ecmd.duplex;
2269 goto send_event;
2270 }
2271 }
2272 port->state.speed = 0;
2273 port->state.duplex = 0;
2274
2275 send_event:
2276 err = team_nl_send_event_port_list_get(port->team);
2277 if (err)
2278 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink\n",
2279 port->dev->name);
2280
2281 }
2282
2283 static void team_port_change_check(struct team_port *port, bool linkup)
2284 {
2285 struct team *team = port->team;
2286
2287 mutex_lock(&team->lock);
2288 __team_port_change_check(port, linkup);
2289 mutex_unlock(&team->lock);
2290 }
2291
2292
2293 /************************************
2294 * Net device notifier event handler
2295 ************************************/
2296
2297 static int team_device_event(struct notifier_block *unused,
2298 unsigned long event, void *ptr)
2299 {
2300 struct net_device *dev = (struct net_device *) ptr;
2301 struct team_port *port;
2302
2303 port = team_port_get_rtnl(dev);
2304 if (!port)
2305 return NOTIFY_DONE;
2306
2307 switch (event) {
2308 case NETDEV_UP:
2309 if (netif_carrier_ok(dev))
2310 team_port_change_check(port, true);
2311 case NETDEV_DOWN:
2312 team_port_change_check(port, false);
2313 case NETDEV_CHANGE:
2314 if (netif_running(port->dev))
2315 team_port_change_check(port,
2316 !!netif_carrier_ok(port->dev));
2317 break;
2318 case NETDEV_UNREGISTER:
2319 team_del_slave(port->team->dev, dev);
2320 break;
2321 case NETDEV_FEAT_CHANGE:
2322 team_compute_features(port->team);
2323 break;
2324 case NETDEV_CHANGEMTU:
2325 /* Forbid to change mtu of underlaying device */
2326 return NOTIFY_BAD;
2327 case NETDEV_PRE_TYPE_CHANGE:
2328 /* Forbid to change type of underlaying device */
2329 return NOTIFY_BAD;
2330 }
2331 return NOTIFY_DONE;
2332 }
2333
2334 static struct notifier_block team_notifier_block __read_mostly = {
2335 .notifier_call = team_device_event,
2336 };
2337
2338
2339 /***********************
2340 * Module init and exit
2341 ***********************/
2342
2343 static int __init team_module_init(void)
2344 {
2345 int err;
2346
2347 register_netdevice_notifier(&team_notifier_block);
2348
2349 err = rtnl_link_register(&team_link_ops);
2350 if (err)
2351 goto err_rtnl_reg;
2352
2353 err = team_nl_init();
2354 if (err)
2355 goto err_nl_init;
2356
2357 return 0;
2358
2359 err_nl_init:
2360 rtnl_link_unregister(&team_link_ops);
2361
2362 err_rtnl_reg:
2363 unregister_netdevice_notifier(&team_notifier_block);
2364
2365 return err;
2366 }
2367
2368 static void __exit team_module_exit(void)
2369 {
2370 team_nl_fini();
2371 rtnl_link_unregister(&team_link_ops);
2372 unregister_netdevice_notifier(&team_notifier_block);
2373 }
2374
2375 module_init(team_module_init);
2376 module_exit(team_module_exit);
2377
2378 MODULE_LICENSE("GPL v2");
2379 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
2380 MODULE_DESCRIPTION("Ethernet team device driver");
2381 MODULE_ALIAS_RTNL_LINK(DRV_NAME);
Linux kernel - Deliverables
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