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Merge tag 'v3.3.7' into 3.3/master
[zen-stable.git] / drivers / net / team / team.c
blob6b678f38e5ced5336cf81c632767e5e13100fe65
1 /*
2 * net/drivers/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/if_vlan.h>
22 #include <linux/if_arp.h>
23 #include <linux/socket.h>
24 #include <linux/etherdevice.h>
25 #include <linux/rtnetlink.h>
26 #include <net/rtnetlink.h>
27 #include <net/genetlink.h>
28 #include <net/netlink.h>
29 #include <linux/if_team.h>
30
31 #define DRV_NAME "team"
32
33
34 /**********
35 * Helpers
36 **********/
37
38 #define team_port_exists(dev) (dev->priv_flags & IFF_TEAM_PORT)
39
40 static struct team_port *team_port_get_rcu(const struct net_device *dev)
41 {
42 struct team_port *port = rcu_dereference(dev->rx_handler_data);
43
44 return team_port_exists(dev) ? port : NULL;
45 }
46
47 static struct team_port *team_port_get_rtnl(const struct net_device *dev)
48 {
49 struct team_port *port = rtnl_dereference(dev->rx_handler_data);
50
51 return team_port_exists(dev) ? port : NULL;
52 }
53
54 /*
55 * Since the ability to change mac address for open port device is tested in
56 * team_port_add, this function can be called without control of return value
57 */
58 static int __set_port_mac(struct net_device *port_dev,
59 const unsigned char *dev_addr)
60 {
61 struct sockaddr addr;
62
63 memcpy(addr.sa_data, dev_addr, ETH_ALEN);
64 addr.sa_family = ARPHRD_ETHER;
65 return dev_set_mac_address(port_dev, &addr);
66 }
67
68 int team_port_set_orig_mac(struct team_port *port)
69 {
70 return __set_port_mac(port->dev, port->orig.dev_addr);
71 }
72
73 int team_port_set_team_mac(struct team_port *port)
74 {
75 return __set_port_mac(port->dev, port->team->dev->dev_addr);
76 }
77 EXPORT_SYMBOL(team_port_set_team_mac);
78
79
80 /*******************
81 * Options handling
82 *******************/
83
84 struct team_option *__team_find_option(struct team *team, const char *opt_name)
85 {
86 struct team_option *option;
87
88 list_for_each_entry(option, &team->option_list, list) {
89 if (strcmp(option->name, opt_name) == 0)
90 return option;
91 }
92 return NULL;
93 }
94
95 int __team_options_register(struct team *team,
96 const struct team_option *option,
97 size_t option_count)
98 {
99 int i;
100 struct team_option **dst_opts;
101 int err;
102
103 dst_opts = kzalloc(sizeof(struct team_option *) * option_count,
104 GFP_KERNEL);
105 if (!dst_opts)
106 return -ENOMEM;
107 for (i = 0; i < option_count; i++, option++) {
108 if (__team_find_option(team, option->name)) {
109 err = -EEXIST;
110 goto rollback;
111 }
112 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
113 if (!dst_opts[i]) {
114 err = -ENOMEM;
115 goto rollback;
116 }
117 }
118
119 for (i = 0; i < option_count; i++) {
120 dst_opts[i]->changed = true;
121 dst_opts[i]->removed = false;
122 list_add_tail(&dst_opts[i]->list, &team->option_list);
123 }
124
125 kfree(dst_opts);
126 return 0;
127
128 rollback:
129 for (i = 0; i < option_count; i++)
130 kfree(dst_opts[i]);
131
132 kfree(dst_opts);
133 return err;
134 }
135
136 static void __team_options_mark_removed(struct team *team,
137 const struct team_option *option,
138 size_t option_count)
139 {
140 int i;
141
142 for (i = 0; i < option_count; i++, option++) {
143 struct team_option *del_opt;
144
145 del_opt = __team_find_option(team, option->name);
146 if (del_opt) {
147 del_opt->changed = true;
148 del_opt->removed = true;
149 }
150 }
151 }
152
153 static void __team_options_unregister(struct team *team,
154 const struct team_option *option,
155 size_t option_count)
156 {
157 int i;
158
159 for (i = 0; i < option_count; i++, option++) {
160 struct team_option *del_opt;
161
162 del_opt = __team_find_option(team, option->name);
163 if (del_opt) {
164 list_del(&del_opt->list);
165 kfree(del_opt);
166 }
167 }
168 }
169
170 static void __team_options_change_check(struct team *team);
171
172 int team_options_register(struct team *team,
173 const struct team_option *option,
174 size_t option_count)
175 {
176 int err;
177
178 err = __team_options_register(team, option, option_count);
179 if (err)
180 return err;
181 __team_options_change_check(team);
182 return 0;
183 }
184 EXPORT_SYMBOL(team_options_register);
185
186 void team_options_unregister(struct team *team,
187 const struct team_option *option,
188 size_t option_count)
189 {
190 __team_options_mark_removed(team, option, option_count);
191 __team_options_change_check(team);
192 __team_options_unregister(team, option, option_count);
193 }
194 EXPORT_SYMBOL(team_options_unregister);
195
196 static int team_option_get(struct team *team, struct team_option *option,
197 void *arg)
198 {
199 return option->getter(team, arg);
200 }
201
202 static int team_option_set(struct team *team, struct team_option *option,
203 void *arg)
204 {
205 int err;
206
207 err = option->setter(team, arg);
208 if (err)
209 return err;
210
211 option->changed = true;
212 __team_options_change_check(team);
213 return err;
214 }
215
216 /****************
217 * Mode handling
218 ****************/
219
220 static LIST_HEAD(mode_list);
221 static DEFINE_SPINLOCK(mode_list_lock);
222
223 static struct team_mode *__find_mode(const char *kind)
224 {
225 struct team_mode *mode;
226
227 list_for_each_entry(mode, &mode_list, list) {
228 if (strcmp(mode->kind, kind) == 0)
229 return mode;
230 }
231 return NULL;
232 }
233
234 static bool is_good_mode_name(const char *name)
235 {
236 while (*name != '\0') {
237 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
238 return false;
239 name++;
240 }
241 return true;
242 }
243
244 int team_mode_register(struct team_mode *mode)
245 {
246 int err = 0;
247
248 if (!is_good_mode_name(mode->kind) ||
249 mode->priv_size > TEAM_MODE_PRIV_SIZE)
250 return -EINVAL;
251 spin_lock(&mode_list_lock);
252 if (__find_mode(mode->kind)) {
253 err = -EEXIST;
254 goto unlock;
255 }
256 list_add_tail(&mode->list, &mode_list);
257 unlock:
258 spin_unlock(&mode_list_lock);
259 return err;
260 }
261 EXPORT_SYMBOL(team_mode_register);
262
263 int team_mode_unregister(struct team_mode *mode)
264 {
265 spin_lock(&mode_list_lock);
266 list_del_init(&mode->list);
267 spin_unlock(&mode_list_lock);
268 return 0;
269 }
270 EXPORT_SYMBOL(team_mode_unregister);
271
272 static struct team_mode *team_mode_get(const char *kind)
273 {
274 struct team_mode *mode;
275
276 spin_lock(&mode_list_lock);
277 mode = __find_mode(kind);
278 if (!mode) {
279 spin_unlock(&mode_list_lock);
280 request_module("team-mode-%s", kind);
281 spin_lock(&mode_list_lock);
282 mode = __find_mode(kind);
283 }
284 if (mode)
285 if (!try_module_get(mode->owner))
286 mode = NULL;
287
288 spin_unlock(&mode_list_lock);
289 return mode;
290 }
291
292 static void team_mode_put(const struct team_mode *mode)
293 {
294 module_put(mode->owner);
295 }
296
297 static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
298 {
299 dev_kfree_skb_any(skb);
300 return false;
301 }
302
303 rx_handler_result_t team_dummy_receive(struct team *team,
304 struct team_port *port,
305 struct sk_buff *skb)
306 {
307 return RX_HANDLER_ANOTHER;
308 }
309
310 static void team_adjust_ops(struct team *team)
311 {
312 /*
313 * To avoid checks in rx/tx skb paths, ensure here that non-null and
314 * correct ops are always set.
315 */
316
317 if (list_empty(&team->port_list) ||
318 !team->mode || !team->mode->ops->transmit)
319 team->ops.transmit = team_dummy_transmit;
320 else
321 team->ops.transmit = team->mode->ops->transmit;
322
323 if (list_empty(&team->port_list) ||
324 !team->mode || !team->mode->ops->receive)
325 team->ops.receive = team_dummy_receive;
326 else
327 team->ops.receive = team->mode->ops->receive;
328 }
329
330 /*
331 * We can benefit from the fact that it's ensured no port is present
332 * at the time of mode change. Therefore no packets are in fly so there's no
333 * need to set mode operations in any special way.
334 */
335 static int __team_change_mode(struct team *team,
336 const struct team_mode *new_mode)
337 {
338 /* Check if mode was previously set and do cleanup if so */
339 if (team->mode) {
340 void (*exit_op)(struct team *team) = team->ops.exit;
341
342 /* Clear ops area so no callback is called any longer */
343 memset(&team->ops, 0, sizeof(struct team_mode_ops));
344 team_adjust_ops(team);
345
346 if (exit_op)
347 exit_op(team);
348 team_mode_put(team->mode);
349 team->mode = NULL;
350 /* zero private data area */
351 memset(&team->mode_priv, 0,
352 sizeof(struct team) - offsetof(struct team, mode_priv));
353 }
354
355 if (!new_mode)
356 return 0;
357
358 if (new_mode->ops->init) {
359 int err;
360
361 err = new_mode->ops->init(team);
362 if (err)
363 return err;
364 }
365
366 team->mode = new_mode;
367 memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
368 team_adjust_ops(team);
369
370 return 0;
371 }
372
373 static int team_change_mode(struct team *team, const char *kind)
374 {
375 struct team_mode *new_mode;
376 struct net_device *dev = team->dev;
377 int err;
378
379 if (!list_empty(&team->port_list)) {
380 netdev_err(dev, "No ports can be present during mode change\n");
381 return -EBUSY;
382 }
383
384 if (team->mode && strcmp(team->mode->kind, kind) == 0) {
385 netdev_err(dev, "Unable to change to the same mode the team is in\n");
386 return -EINVAL;
387 }
388
389 new_mode = team_mode_get(kind);
390 if (!new_mode) {
391 netdev_err(dev, "Mode \"%s\" not found\n", kind);
392 return -EINVAL;
393 }
394
395 err = __team_change_mode(team, new_mode);
396 if (err) {
397 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
398 team_mode_put(new_mode);
399 return err;
400 }
401
402 netdev_info(dev, "Mode changed to \"%s\"\n", kind);
403 return 0;
404 }
405
406
407 /************************
408 * Rx path frame handler
409 ************************/
410
411 /* note: already called with rcu_read_lock */
412 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
413 {
414 struct sk_buff *skb = *pskb;
415 struct team_port *port;
416 struct team *team;
417 rx_handler_result_t res;
418
419 skb = skb_share_check(skb, GFP_ATOMIC);
420 if (!skb)
421 return RX_HANDLER_CONSUMED;
422
423 *pskb = skb;
424
425 port = team_port_get_rcu(skb->dev);
426 team = port->team;
427
428 res = team->ops.receive(team, port, skb);
429 if (res == RX_HANDLER_ANOTHER) {
430 struct team_pcpu_stats *pcpu_stats;
431
432 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
433 u64_stats_update_begin(&pcpu_stats->syncp);
434 pcpu_stats->rx_packets++;
435 pcpu_stats->rx_bytes += skb->len;
436 if (skb->pkt_type == PACKET_MULTICAST)
437 pcpu_stats->rx_multicast++;
438 u64_stats_update_end(&pcpu_stats->syncp);
439
440 skb->dev = team->dev;
441 } else {
442 this_cpu_inc(team->pcpu_stats->rx_dropped);
443 }
444
445 return res;
446 }
447
448
449 /****************
450 * Port handling
451 ****************/
452
453 static bool team_port_find(const struct team *team,
454 const struct team_port *port)
455 {
456 struct team_port *cur;
457
458 list_for_each_entry(cur, &team->port_list, list)
459 if (cur == port)
460 return true;
461 return false;
462 }
463
464 /*
465 * Add/delete port to the team port list. Write guarded by rtnl_lock.
466 * Takes care of correct port->index setup (might be racy).
467 */
468 static void team_port_list_add_port(struct team *team,
469 struct team_port *port)
470 {
471 port->index = team->port_count++;
472 hlist_add_head_rcu(&port->hlist,
473 team_port_index_hash(team, port->index));
474 list_add_tail_rcu(&port->list, &team->port_list);
475 }
476
477 static void __reconstruct_port_hlist(struct team *team, int rm_index)
478 {
479 int i;
480 struct team_port *port;
481
482 for (i = rm_index + 1; i < team->port_count; i++) {
483 port = team_get_port_by_index(team, i);
484 hlist_del_rcu(&port->hlist);
485 port->index--;
486 hlist_add_head_rcu(&port->hlist,
487 team_port_index_hash(team, port->index));
488 }
489 }
490
491 static void team_port_list_del_port(struct team *team,
492 struct team_port *port)
493 {
494 int rm_index = port->index;
495
496 hlist_del_rcu(&port->hlist);
497 list_del_rcu(&port->list);
498 __reconstruct_port_hlist(team, rm_index);
499 team->port_count--;
500 }
501
502 #define TEAM_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \
503 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
504 NETIF_F_HIGHDMA | NETIF_F_LRO)
505
506 static void __team_compute_features(struct team *team)
507 {
508 struct team_port *port;
509 u32 vlan_features = TEAM_VLAN_FEATURES;
510 unsigned short max_hard_header_len = ETH_HLEN;
511
512 list_for_each_entry(port, &team->port_list, list) {
513 vlan_features = netdev_increment_features(vlan_features,
514 port->dev->vlan_features,
515 TEAM_VLAN_FEATURES);
516
517 if (port->dev->hard_header_len > max_hard_header_len)
518 max_hard_header_len = port->dev->hard_header_len;
519 }
520
521 team->dev->vlan_features = vlan_features;
522 team->dev->hard_header_len = max_hard_header_len;
523
524 netdev_change_features(team->dev);
525 }
526
527 static void team_compute_features(struct team *team)
528 {
529 mutex_lock(&team->lock);
530 __team_compute_features(team);
531 mutex_unlock(&team->lock);
532 }
533
534 static int team_port_enter(struct team *team, struct team_port *port)
535 {
536 int err = 0;
537
538 dev_hold(team->dev);
539 port->dev->priv_flags |= IFF_TEAM_PORT;
540 if (team->ops.port_enter) {
541 err = team->ops.port_enter(team, port);
542 if (err) {
543 netdev_err(team->dev, "Device %s failed to enter team mode\n",
544 port->dev->name);
545 goto err_port_enter;
546 }
547 }
548
549 return 0;
550
551 err_port_enter:
552 port->dev->priv_flags &= ~IFF_TEAM_PORT;
553 dev_put(team->dev);
554
555 return err;
556 }
557
558 static void team_port_leave(struct team *team, struct team_port *port)
559 {
560 if (team->ops.port_leave)
561 team->ops.port_leave(team, port);
562 port->dev->priv_flags &= ~IFF_TEAM_PORT;
563 dev_put(team->dev);
564 }
565
566 static void __team_port_change_check(struct team_port *port, bool linkup);
567
568 static int team_port_add(struct team *team, struct net_device *port_dev)
569 {
570 struct net_device *dev = team->dev;
571 struct team_port *port;
572 char *portname = port_dev->name;
573 int err;
574
575 if (port_dev->flags & IFF_LOOPBACK ||
576 port_dev->type != ARPHRD_ETHER) {
577 netdev_err(dev, "Device %s is of an unsupported type\n",
578 portname);
579 return -EINVAL;
580 }
581
582 if (team_port_exists(port_dev)) {
583 netdev_err(dev, "Device %s is already a port "
584 "of a team device\n", portname);
585 return -EBUSY;
586 }
587
588 if (port_dev->flags & IFF_UP) {
589 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
590 portname);
591 return -EBUSY;
592 }
593
594 port = kzalloc(sizeof(struct team_port), GFP_KERNEL);
595 if (!port)
596 return -ENOMEM;
597
598 port->dev = port_dev;
599 port->team = team;
600
601 port->orig.mtu = port_dev->mtu;
602 err = dev_set_mtu(port_dev, dev->mtu);
603 if (err) {
604 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
605 goto err_set_mtu;
606 }
607
608 memcpy(port->orig.dev_addr, port_dev->dev_addr, ETH_ALEN);
609
610 err = team_port_enter(team, port);
611 if (err) {
612 netdev_err(dev, "Device %s failed to enter team mode\n",
613 portname);
614 goto err_port_enter;
615 }
616
617 err = dev_open(port_dev);
618 if (err) {
619 netdev_dbg(dev, "Device %s opening failed\n",
620 portname);
621 goto err_dev_open;
622 }
623
624 err = vlan_vids_add_by_dev(port_dev, dev);
625 if (err) {
626 netdev_err(dev, "Failed to add vlan ids to device %s\n",
627 portname);
628 goto err_vids_add;
629 }
630
631 err = netdev_set_master(port_dev, dev);
632 if (err) {
633 netdev_err(dev, "Device %s failed to set master\n", portname);
634 goto err_set_master;
635 }
636
637 err = netdev_rx_handler_register(port_dev, team_handle_frame,
638 port);
639 if (err) {
640 netdev_err(dev, "Device %s failed to register rx_handler\n",
641 portname);
642 goto err_handler_register;
643 }
644
645 team_port_list_add_port(team, port);
646 team_adjust_ops(team);
647 __team_compute_features(team);
648 __team_port_change_check(port, !!netif_carrier_ok(port_dev));
649
650 netdev_info(dev, "Port device %s added\n", portname);
651
652 return 0;
653
654 err_handler_register:
655 netdev_set_master(port_dev, NULL);
656
657 err_set_master:
658 vlan_vids_del_by_dev(port_dev, dev);
659
660 err_vids_add:
661 dev_close(port_dev);
662
663 err_dev_open:
664 team_port_leave(team, port);
665 team_port_set_orig_mac(port);
666
667 err_port_enter:
668 dev_set_mtu(port_dev, port->orig.mtu);
669
670 err_set_mtu:
671 kfree(port);
672
673 return err;
674 }
675
676 static int team_port_del(struct team *team, struct net_device *port_dev)
677 {
678 struct net_device *dev = team->dev;
679 struct team_port *port;
680 char *portname = port_dev->name;
681
682 port = team_port_get_rtnl(port_dev);
683 if (!port || !team_port_find(team, port)) {
684 netdev_err(dev, "Device %s does not act as a port of this team\n",
685 portname);
686 return -ENOENT;
687 }
688
689 port->removed = true;
690 __team_port_change_check(port, false);
691 team_port_list_del_port(team, port);
692 team_adjust_ops(team);
693 netdev_rx_handler_unregister(port_dev);
694 netdev_set_master(port_dev, NULL);
695 vlan_vids_del_by_dev(port_dev, dev);
696 dev_close(port_dev);
697 team_port_leave(team, port);
698 team_port_set_orig_mac(port);
699 dev_set_mtu(port_dev, port->orig.mtu);
700 synchronize_rcu();
701 kfree(port);
702 netdev_info(dev, "Port device %s removed\n", portname);
703 __team_compute_features(team);
704
705 return 0;
706 }
707
708
709 /*****************
710 * Net device ops
711 *****************/
712
713 static const char team_no_mode_kind[] = "*NOMODE*";
714
715 static int team_mode_option_get(struct team *team, void *arg)
716 {
717 const char **str = arg;
718
719 *str = team->mode ? team->mode->kind : team_no_mode_kind;
720 return 0;
721 }
722
723 static int team_mode_option_set(struct team *team, void *arg)
724 {
725 const char **str = arg;
726
727 return team_change_mode(team, *str);
728 }
729
730 static const struct team_option team_options[] = {
731 {
732 .name = "mode",
733 .type = TEAM_OPTION_TYPE_STRING,
734 .getter = team_mode_option_get,
735 .setter = team_mode_option_set,
736 },
737 };
738
739 static int team_init(struct net_device *dev)
740 {
741 struct team *team = netdev_priv(dev);
742 int i;
743 int err;
744
745 team->dev = dev;
746 mutex_init(&team->lock);
747
748 team->pcpu_stats = alloc_percpu(struct team_pcpu_stats);
749 if (!team->pcpu_stats)
750 return -ENOMEM;
751
752 for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
753 INIT_HLIST_HEAD(&team->port_hlist[i]);
754 INIT_LIST_HEAD(&team->port_list);
755
756 team_adjust_ops(team);
757
758 INIT_LIST_HEAD(&team->option_list);
759 err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
760 if (err)
761 goto err_options_register;
762 netif_carrier_off(dev);
763
764 return 0;
765
766 err_options_register:
767 free_percpu(team->pcpu_stats);
768
769 return err;
770 }
771
772 static void team_uninit(struct net_device *dev)
773 {
774 struct team *team = netdev_priv(dev);
775 struct team_port *port;
776 struct team_port *tmp;
777
778 mutex_lock(&team->lock);
779 list_for_each_entry_safe(port, tmp, &team->port_list, list)
780 team_port_del(team, port->dev);
781
782 __team_change_mode(team, NULL); /* cleanup */
783 __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
784 mutex_unlock(&team->lock);
785 }
786
787 static void team_destructor(struct net_device *dev)
788 {
789 struct team *team = netdev_priv(dev);
790
791 free_percpu(team->pcpu_stats);
792 free_netdev(dev);
793 }
794
795 static int team_open(struct net_device *dev)
796 {
797 netif_carrier_on(dev);
798 return 0;
799 }
800
801 static int team_close(struct net_device *dev)
802 {
803 netif_carrier_off(dev);
804 return 0;
805 }
806
807 /*
808 * note: already called with rcu_read_lock
809 */
810 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
811 {
812 struct team *team = netdev_priv(dev);
813 bool tx_success = false;
814 unsigned int len = skb->len;
815
816 tx_success = team->ops.transmit(team, skb);
817 if (tx_success) {
818 struct team_pcpu_stats *pcpu_stats;
819
820 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
821 u64_stats_update_begin(&pcpu_stats->syncp);
822 pcpu_stats->tx_packets++;
823 pcpu_stats->tx_bytes += len;
824 u64_stats_update_end(&pcpu_stats->syncp);
825 } else {
826 this_cpu_inc(team->pcpu_stats->tx_dropped);
827 }
828
829 return NETDEV_TX_OK;
830 }
831
832 static void team_change_rx_flags(struct net_device *dev, int change)
833 {
834 struct team *team = netdev_priv(dev);
835 struct team_port *port;
836 int inc;
837
838 rcu_read_lock();
839 list_for_each_entry_rcu(port, &team->port_list, list) {
840 if (change & IFF_PROMISC) {
841 inc = dev->flags & IFF_PROMISC ? 1 : -1;
842 dev_set_promiscuity(port->dev, inc);
843 }
844 if (change & IFF_ALLMULTI) {
845 inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
846 dev_set_allmulti(port->dev, inc);
847 }
848 }
849 rcu_read_unlock();
850 }
851
852 static void team_set_rx_mode(struct net_device *dev)
853 {
854 struct team *team = netdev_priv(dev);
855 struct team_port *port;
856
857 rcu_read_lock();
858 list_for_each_entry_rcu(port, &team->port_list, list) {
859 dev_uc_sync(port->dev, dev);
860 dev_mc_sync(port->dev, dev);
861 }
862 rcu_read_unlock();
863 }
864
865 static int team_set_mac_address(struct net_device *dev, void *p)
866 {
867 struct team *team = netdev_priv(dev);
868 struct team_port *port;
869 struct sockaddr *addr = p;
870
871 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
872 rcu_read_lock();
873 list_for_each_entry_rcu(port, &team->port_list, list)
874 if (team->ops.port_change_mac)
875 team->ops.port_change_mac(team, port);
876 rcu_read_unlock();
877 return 0;
878 }
879
880 static int team_change_mtu(struct net_device *dev, int new_mtu)
881 {
882 struct team *team = netdev_priv(dev);
883 struct team_port *port;
884 int err;
885
886 /*
887 * Alhough this is reader, it's guarded by team lock. It's not possible
888 * to traverse list in reverse under rcu_read_lock
889 */
890 mutex_lock(&team->lock);
891 list_for_each_entry(port, &team->port_list, list) {
892 err = dev_set_mtu(port->dev, new_mtu);
893 if (err) {
894 netdev_err(dev, "Device %s failed to change mtu",
895 port->dev->name);
896 goto unwind;
897 }
898 }
899 mutex_unlock(&team->lock);
900
901 dev->mtu = new_mtu;
902
903 return 0;
904
905 unwind:
906 list_for_each_entry_continue_reverse(port, &team->port_list, list)
907 dev_set_mtu(port->dev, dev->mtu);
908 mutex_unlock(&team->lock);
909
910 return err;
911 }
912
913 static struct rtnl_link_stats64 *
914 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
915 {
916 struct team *team = netdev_priv(dev);
917 struct team_pcpu_stats *p;
918 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
919 u32 rx_dropped = 0, tx_dropped = 0;
920 unsigned int start;
921 int i;
922
923 for_each_possible_cpu(i) {
924 p = per_cpu_ptr(team->pcpu_stats, i);
925 do {
926 start = u64_stats_fetch_begin_bh(&p->syncp);
927 rx_packets = p->rx_packets;
928 rx_bytes = p->rx_bytes;
929 rx_multicast = p->rx_multicast;
930 tx_packets = p->tx_packets;
931 tx_bytes = p->tx_bytes;
932 } while (u64_stats_fetch_retry_bh(&p->syncp, start));
933
934 stats->rx_packets += rx_packets;
935 stats->rx_bytes += rx_bytes;
936 stats->multicast += rx_multicast;
937 stats->tx_packets += tx_packets;
938 stats->tx_bytes += tx_bytes;
939 /*
940 * rx_dropped & tx_dropped are u32, updated
941 * without syncp protection.
942 */
943 rx_dropped += p->rx_dropped;
944 tx_dropped += p->tx_dropped;
945 }
946 stats->rx_dropped = rx_dropped;
947 stats->tx_dropped = tx_dropped;
948 return stats;
949 }
950
951 static int team_vlan_rx_add_vid(struct net_device *dev, uint16_t vid)
952 {
953 struct team *team = netdev_priv(dev);
954 struct team_port *port;
955 int err;
956
957 /*
958 * Alhough this is reader, it's guarded by team lock. It's not possible
959 * to traverse list in reverse under rcu_read_lock
960 */
961 mutex_lock(&team->lock);
962 list_for_each_entry(port, &team->port_list, list) {
963 err = vlan_vid_add(port->dev, vid);
964 if (err)
965 goto unwind;
966 }
967 mutex_unlock(&team->lock);
968
969 return 0;
970
971 unwind:
972 list_for_each_entry_continue_reverse(port, &team->port_list, list)
973 vlan_vid_del(port->dev, vid);
974 mutex_unlock(&team->lock);
975
976 return err;
977 }
978
979 static int team_vlan_rx_kill_vid(struct net_device *dev, uint16_t vid)
980 {
981 struct team *team = netdev_priv(dev);
982 struct team_port *port;
983
984 rcu_read_lock();
985 list_for_each_entry_rcu(port, &team->port_list, list)
986 vlan_vid_del(port->dev, vid);
987 rcu_read_unlock();
988
989 return 0;
990 }
991
992 static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
993 {
994 struct team *team = netdev_priv(dev);
995 int err;
996
997 mutex_lock(&team->lock);
998 err = team_port_add(team, port_dev);
999 mutex_unlock(&team->lock);
1000 return err;
1001 }
1002
1003 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1004 {
1005 struct team *team = netdev_priv(dev);
1006 int err;
1007
1008 mutex_lock(&team->lock);
1009 err = team_port_del(team, port_dev);
1010 mutex_unlock(&team->lock);
1011 return err;
1012 }
1013
1014 static netdev_features_t team_fix_features(struct net_device *dev,
1015 netdev_features_t features)
1016 {
1017 struct team_port *port;
1018 struct team *team = netdev_priv(dev);
1019 netdev_features_t mask;
1020
1021 mask = features;
1022 features &= ~NETIF_F_ONE_FOR_ALL;
1023 features |= NETIF_F_ALL_FOR_ALL;
1024
1025 rcu_read_lock();
1026 list_for_each_entry_rcu(port, &team->port_list, list) {
1027 features = netdev_increment_features(features,
1028 port->dev->features,
1029 mask);
1030 }
1031 rcu_read_unlock();
1032 return features;
1033 }
1034
1035 static const struct net_device_ops team_netdev_ops = {
1036 .ndo_init = team_init,
1037 .ndo_uninit = team_uninit,
1038 .ndo_open = team_open,
1039 .ndo_stop = team_close,
1040 .ndo_start_xmit = team_xmit,
1041 .ndo_change_rx_flags = team_change_rx_flags,
1042 .ndo_set_rx_mode = team_set_rx_mode,
1043 .ndo_set_mac_address = team_set_mac_address,
1044 .ndo_change_mtu = team_change_mtu,
1045 .ndo_get_stats64 = team_get_stats64,
1046 .ndo_vlan_rx_add_vid = team_vlan_rx_add_vid,
1047 .ndo_vlan_rx_kill_vid = team_vlan_rx_kill_vid,
1048 .ndo_add_slave = team_add_slave,
1049 .ndo_del_slave = team_del_slave,
1050 .ndo_fix_features = team_fix_features,
1051 };
1052
1053
1054 /***********************
1055 * rt netlink interface
1056 ***********************/
1057
1058 static void team_setup(struct net_device *dev)
1059 {
1060 ether_setup(dev);
1061
1062 dev->netdev_ops = &team_netdev_ops;
1063 dev->destructor = team_destructor;
1064 dev->tx_queue_len = 0;
1065 dev->flags |= IFF_MULTICAST;
1066 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
1067
1068 /*
1069 * Indicate we support unicast address filtering. That way core won't
1070 * bring us to promisc mode in case a unicast addr is added.
1071 * Let this up to underlay drivers.
1072 */
1073 dev->priv_flags |= IFF_UNICAST_FLT;
1074
1075 dev->features |= NETIF_F_LLTX;
1076 dev->features |= NETIF_F_GRO;
1077 dev->hw_features = NETIF_F_HW_VLAN_TX |
1078 NETIF_F_HW_VLAN_RX |
1079 NETIF_F_HW_VLAN_FILTER;
1080
1081 dev->features |= dev->hw_features;
1082 }
1083
1084 static int team_newlink(struct net *src_net, struct net_device *dev,
1085 struct nlattr *tb[], struct nlattr *data[])
1086 {
1087 int err;
1088
1089 if (tb[IFLA_ADDRESS] == NULL)
1090 random_ether_addr(dev->dev_addr);
1091
1092 err = register_netdevice(dev);
1093 if (err)
1094 return err;
1095
1096 return 0;
1097 }
1098
1099 static int team_validate(struct nlattr *tb[], struct nlattr *data[])
1100 {
1101 if (tb[IFLA_ADDRESS]) {
1102 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
1103 return -EINVAL;
1104 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
1105 return -EADDRNOTAVAIL;
1106 }
1107 return 0;
1108 }
1109
1110 static struct rtnl_link_ops team_link_ops __read_mostly = {
1111 .kind = DRV_NAME,
1112 .priv_size = sizeof(struct team),
1113 .setup = team_setup,
1114 .newlink = team_newlink,
1115 .validate = team_validate,
1116 };
1117
1118
1119 /***********************************
1120 * Generic netlink custom interface
1121 ***********************************/
1122
1123 static struct genl_family team_nl_family = {
1124 .id = GENL_ID_GENERATE,
1125 .name = TEAM_GENL_NAME,
1126 .version = TEAM_GENL_VERSION,
1127 .maxattr = TEAM_ATTR_MAX,
1128 .netnsok = true,
1129 };
1130
1131 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
1132 [TEAM_ATTR_UNSPEC] = { .type = NLA_UNSPEC, },
1133 [TEAM_ATTR_TEAM_IFINDEX] = { .type = NLA_U32 },
1134 [TEAM_ATTR_LIST_OPTION] = { .type = NLA_NESTED },
1135 [TEAM_ATTR_LIST_PORT] = { .type = NLA_NESTED },
1136 };
1137
1138 static const struct nla_policy
1139 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
1140 [TEAM_ATTR_OPTION_UNSPEC] = { .type = NLA_UNSPEC, },
1141 [TEAM_ATTR_OPTION_NAME] = {
1142 .type = NLA_STRING,
1143 .len = TEAM_STRING_MAX_LEN,
1144 },
1145 [TEAM_ATTR_OPTION_CHANGED] = { .type = NLA_FLAG },
1146 [TEAM_ATTR_OPTION_TYPE] = { .type = NLA_U8 },
1147 [TEAM_ATTR_OPTION_DATA] = {
1148 .type = NLA_BINARY,
1149 .len = TEAM_STRING_MAX_LEN,
1150 },
1151 };
1152
1153 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
1154 {
1155 struct sk_buff *msg;
1156 void *hdr;
1157 int err;
1158
1159 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1160 if (!msg)
1161 return -ENOMEM;
1162
1163 hdr = genlmsg_put(msg, info->snd_pid, info->snd_seq,
1164 &team_nl_family, 0, TEAM_CMD_NOOP);
1165 if (IS_ERR(hdr)) {
1166 err = PTR_ERR(hdr);
1167 goto err_msg_put;
1168 }
1169
1170 genlmsg_end(msg, hdr);
1171
1172 return genlmsg_unicast(genl_info_net(info), msg, info->snd_pid);
1173
1174 err_msg_put:
1175 nlmsg_free(msg);
1176
1177 return err;
1178 }
1179
1180 /*
1181 * Netlink cmd functions should be locked by following two functions.
1182 * Since dev gets held here, that ensures dev won't disappear in between.
1183 */
1184 static struct team *team_nl_team_get(struct genl_info *info)
1185 {
1186 struct net *net = genl_info_net(info);
1187 int ifindex;
1188 struct net_device *dev;
1189 struct team *team;
1190
1191 if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
1192 return NULL;
1193
1194 ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
1195 dev = dev_get_by_index(net, ifindex);
1196 if (!dev || dev->netdev_ops != &team_netdev_ops) {
1197 if (dev)
1198 dev_put(dev);
1199 return NULL;
1200 }
1201
1202 team = netdev_priv(dev);
1203 mutex_lock(&team->lock);
1204 return team;
1205 }
1206
1207 static void team_nl_team_put(struct team *team)
1208 {
1209 mutex_unlock(&team->lock);
1210 dev_put(team->dev);
1211 }
1212
1213 static int team_nl_send_generic(struct genl_info *info, struct team *team,
1214 int (*fill_func)(struct sk_buff *skb,
1215 struct genl_info *info,
1216 int flags, struct team *team))
1217 {
1218 struct sk_buff *skb;
1219 int err;
1220
1221 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1222 if (!skb)
1223 return -ENOMEM;
1224
1225 err = fill_func(skb, info, NLM_F_ACK, team);
1226 if (err < 0)
1227 goto err_fill;
1228
1229 err = genlmsg_unicast(genl_info_net(info), skb, info->snd_pid);
1230 return err;
1231
1232 err_fill:
1233 nlmsg_free(skb);
1234 return err;
1235 }
1236
1237 static int team_nl_fill_options_get(struct sk_buff *skb,
1238 u32 pid, u32 seq, int flags,
1239 struct team *team, bool fillall)
1240 {
1241 struct nlattr *option_list;
1242 void *hdr;
1243 struct team_option *option;
1244
1245 hdr = genlmsg_put(skb, pid, seq, &team_nl_family, flags,
1246 TEAM_CMD_OPTIONS_GET);
1247 if (IS_ERR(hdr))
1248 return PTR_ERR(hdr);
1249
1250 NLA_PUT_U32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex);
1251 option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
1252 if (!option_list)
1253 return -EMSGSIZE;
1254
1255 list_for_each_entry(option, &team->option_list, list) {
1256 struct nlattr *option_item;
1257 long arg;
1258
1259 /* Include only changed options if fill all mode is not on */
1260 if (!fillall && !option->changed)
1261 continue;
1262 option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
1263 if (!option_item)
1264 goto nla_put_failure;
1265 NLA_PUT_STRING(skb, TEAM_ATTR_OPTION_NAME, option->name);
1266 if (option->changed) {
1267 NLA_PUT_FLAG(skb, TEAM_ATTR_OPTION_CHANGED);
1268 option->changed = false;
1269 }
1270 if (option->removed)
1271 NLA_PUT_FLAG(skb, TEAM_ATTR_OPTION_REMOVED);
1272 switch (option->type) {
1273 case TEAM_OPTION_TYPE_U32:
1274 NLA_PUT_U8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32);
1275 team_option_get(team, option, &arg);
1276 NLA_PUT_U32(skb, TEAM_ATTR_OPTION_DATA, arg);
1277 break;
1278 case TEAM_OPTION_TYPE_STRING:
1279 NLA_PUT_U8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING);
1280 team_option_get(team, option, &arg);
1281 NLA_PUT_STRING(skb, TEAM_ATTR_OPTION_DATA,
1282 (char *) arg);
1283 break;
1284 default:
1285 BUG();
1286 }
1287 nla_nest_end(skb, option_item);
1288 }
1289
1290 nla_nest_end(skb, option_list);
1291 return genlmsg_end(skb, hdr);
1292
1293 nla_put_failure:
1294 genlmsg_cancel(skb, hdr);
1295 return -EMSGSIZE;
1296 }
1297
1298 static int team_nl_fill_options_get_all(struct sk_buff *skb,
1299 struct genl_info *info, int flags,
1300 struct team *team)
1301 {
1302 return team_nl_fill_options_get(skb, info->snd_pid,
1303 info->snd_seq, NLM_F_ACK,
1304 team, true);
1305 }
1306
1307 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
1308 {
1309 struct team *team;
1310 int err;
1311
1312 team = team_nl_team_get(info);
1313 if (!team)
1314 return -EINVAL;
1315
1316 err = team_nl_send_generic(info, team, team_nl_fill_options_get_all);
1317
1318 team_nl_team_put(team);
1319
1320 return err;
1321 }
1322
1323 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
1324 {
1325 struct team *team;
1326 int err = 0;
1327 int i;
1328 struct nlattr *nl_option;
1329
1330 team = team_nl_team_get(info);
1331 if (!team)
1332 return -EINVAL;
1333
1334 err = -EINVAL;
1335 if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
1336 err = -EINVAL;
1337 goto team_put;
1338 }
1339
1340 nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
1341 struct nlattr *mode_attrs[TEAM_ATTR_OPTION_MAX + 1];
1342 enum team_option_type opt_type;
1343 struct team_option *option;
1344 char *opt_name;
1345 bool opt_found = false;
1346
1347 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
1348 err = -EINVAL;
1349 goto team_put;
1350 }
1351 err = nla_parse_nested(mode_attrs, TEAM_ATTR_OPTION_MAX,
1352 nl_option, team_nl_option_policy);
1353 if (err)
1354 goto team_put;
1355 if (!mode_attrs[TEAM_ATTR_OPTION_NAME] ||
1356 !mode_attrs[TEAM_ATTR_OPTION_TYPE] ||
1357 !mode_attrs[TEAM_ATTR_OPTION_DATA]) {
1358 err = -EINVAL;
1359 goto team_put;
1360 }
1361 switch (nla_get_u8(mode_attrs[TEAM_ATTR_OPTION_TYPE])) {
1362 case NLA_U32:
1363 opt_type = TEAM_OPTION_TYPE_U32;
1364 break;
1365 case NLA_STRING:
1366 opt_type = TEAM_OPTION_TYPE_STRING;
1367 break;
1368 default:
1369 goto team_put;
1370 }
1371
1372 opt_name = nla_data(mode_attrs[TEAM_ATTR_OPTION_NAME]);
1373 list_for_each_entry(option, &team->option_list, list) {
1374 long arg;
1375 struct nlattr *opt_data_attr;
1376
1377 if (option->type != opt_type ||
1378 strcmp(option->name, opt_name))
1379 continue;
1380 opt_found = true;
1381 opt_data_attr = mode_attrs[TEAM_ATTR_OPTION_DATA];
1382 switch (opt_type) {
1383 case TEAM_OPTION_TYPE_U32:
1384 arg = nla_get_u32(opt_data_attr);
1385 break;
1386 case TEAM_OPTION_TYPE_STRING:
1387 arg = (long) nla_data(opt_data_attr);
1388 break;
1389 default:
1390 BUG();
1391 }
1392 err = team_option_set(team, option, &arg);
1393 if (err)
1394 goto team_put;
1395 }
1396 if (!opt_found) {
1397 err = -ENOENT;
1398 goto team_put;
1399 }
1400 }
1401
1402 team_put:
1403 team_nl_team_put(team);
1404
1405 return err;
1406 }
1407
1408 static int team_nl_fill_port_list_get(struct sk_buff *skb,
1409 u32 pid, u32 seq, int flags,
1410 struct team *team,
1411 bool fillall)
1412 {
1413 struct nlattr *port_list;
1414 void *hdr;
1415 struct team_port *port;
1416
1417 hdr = genlmsg_put(skb, pid, seq, &team_nl_family, flags,
1418 TEAM_CMD_PORT_LIST_GET);
1419 if (IS_ERR(hdr))
1420 return PTR_ERR(hdr);
1421
1422 NLA_PUT_U32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex);
1423 port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
1424 if (!port_list)
1425 return -EMSGSIZE;
1426
1427 list_for_each_entry(port, &team->port_list, list) {
1428 struct nlattr *port_item;
1429
1430 /* Include only changed ports if fill all mode is not on */
1431 if (!fillall && !port->changed)
1432 continue;
1433 port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
1434 if (!port_item)
1435 goto nla_put_failure;
1436 NLA_PUT_U32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex);
1437 if (port->changed) {
1438 NLA_PUT_FLAG(skb, TEAM_ATTR_PORT_CHANGED);
1439 port->changed = false;
1440 }
1441 if (port->removed)
1442 NLA_PUT_FLAG(skb, TEAM_ATTR_PORT_REMOVED);
1443 if (port->linkup)
1444 NLA_PUT_FLAG(skb, TEAM_ATTR_PORT_LINKUP);
1445 NLA_PUT_U32(skb, TEAM_ATTR_PORT_SPEED, port->speed);
1446 NLA_PUT_U8(skb, TEAM_ATTR_PORT_DUPLEX, port->duplex);
1447 nla_nest_end(skb, port_item);
1448 }
1449
1450 nla_nest_end(skb, port_list);
1451 return genlmsg_end(skb, hdr);
1452
1453 nla_put_failure:
1454 genlmsg_cancel(skb, hdr);
1455 return -EMSGSIZE;
1456 }
1457
1458 static int team_nl_fill_port_list_get_all(struct sk_buff *skb,
1459 struct genl_info *info, int flags,
1460 struct team *team)
1461 {
1462 return team_nl_fill_port_list_get(skb, info->snd_pid,
1463 info->snd_seq, NLM_F_ACK,
1464 team, true);
1465 }
1466
1467 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
1468 struct genl_info *info)
1469 {
1470 struct team *team;
1471 int err;
1472
1473 team = team_nl_team_get(info);
1474 if (!team)
1475 return -EINVAL;
1476
1477 err = team_nl_send_generic(info, team, team_nl_fill_port_list_get_all);
1478
1479 team_nl_team_put(team);
1480
1481 return err;
1482 }
1483
1484 static struct genl_ops team_nl_ops[] = {
1485 {
1486 .cmd = TEAM_CMD_NOOP,
1487 .doit = team_nl_cmd_noop,
1488 .policy = team_nl_policy,
1489 },
1490 {
1491 .cmd = TEAM_CMD_OPTIONS_SET,
1492 .doit = team_nl_cmd_options_set,
1493 .policy = team_nl_policy,
1494 .flags = GENL_ADMIN_PERM,
1495 },
1496 {
1497 .cmd = TEAM_CMD_OPTIONS_GET,
1498 .doit = team_nl_cmd_options_get,
1499 .policy = team_nl_policy,
1500 .flags = GENL_ADMIN_PERM,
1501 },
1502 {
1503 .cmd = TEAM_CMD_PORT_LIST_GET,
1504 .doit = team_nl_cmd_port_list_get,
1505 .policy = team_nl_policy,
1506 .flags = GENL_ADMIN_PERM,
1507 },
1508 };
1509
1510 static struct genl_multicast_group team_change_event_mcgrp = {
1511 .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME,
1512 };
1513
1514 static int team_nl_send_event_options_get(struct team *team)
1515 {
1516 struct sk_buff *skb;
1517 int err;
1518 struct net *net = dev_net(team->dev);
1519
1520 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1521 if (!skb)
1522 return -ENOMEM;
1523
1524 err = team_nl_fill_options_get(skb, 0, 0, 0, team, false);
1525 if (err < 0)
1526 goto err_fill;
1527
1528 err = genlmsg_multicast_netns(net, skb, 0, team_change_event_mcgrp.id,
1529 GFP_KERNEL);
1530 return err;
1531
1532 err_fill:
1533 nlmsg_free(skb);
1534 return err;
1535 }
1536
1537 static int team_nl_send_event_port_list_get(struct team *team)
1538 {
1539 struct sk_buff *skb;
1540 int err;
1541 struct net *net = dev_net(team->dev);
1542
1543 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1544 if (!skb)
1545 return -ENOMEM;
1546
1547 err = team_nl_fill_port_list_get(skb, 0, 0, 0, team, false);
1548 if (err < 0)
1549 goto err_fill;
1550
1551 err = genlmsg_multicast_netns(net, skb, 0, team_change_event_mcgrp.id,
1552 GFP_KERNEL);
1553 return err;
1554
1555 err_fill:
1556 nlmsg_free(skb);
1557 return err;
1558 }
1559
1560 static int team_nl_init(void)
1561 {
1562 int err;
1563
1564 err = genl_register_family_with_ops(&team_nl_family, team_nl_ops,
1565 ARRAY_SIZE(team_nl_ops));
1566 if (err)
1567 return err;
1568
1569 err = genl_register_mc_group(&team_nl_family, &team_change_event_mcgrp);
1570 if (err)
1571 goto err_change_event_grp_reg;
1572
1573 return 0;
1574
1575 err_change_event_grp_reg:
1576 genl_unregister_family(&team_nl_family);
1577
1578 return err;
1579 }
1580
1581 static void team_nl_fini(void)
1582 {
1583 genl_unregister_family(&team_nl_family);
1584 }
1585
1586
1587 /******************
1588 * Change checkers
1589 ******************/
1590
1591 static void __team_options_change_check(struct team *team)
1592 {
1593 int err;
1594
1595 err = team_nl_send_event_options_get(team);
1596 if (err)
1597 netdev_warn(team->dev, "Failed to send options change via netlink\n");
1598 }
1599
1600 /* rtnl lock is held */
1601 static void __team_port_change_check(struct team_port *port, bool linkup)
1602 {
1603 int err;
1604
1605 if (!port->removed && port->linkup == linkup)
1606 return;
1607
1608 port->changed = true;
1609 port->linkup = linkup;
1610 if (linkup) {
1611 struct ethtool_cmd ecmd;
1612
1613 err = __ethtool_get_settings(port->dev, &ecmd);
1614 if (!err) {
1615 port->speed = ethtool_cmd_speed(&ecmd);
1616 port->duplex = ecmd.duplex;
1617 goto send_event;
1618 }
1619 }
1620 port->speed = 0;
1621 port->duplex = 0;
1622
1623 send_event:
1624 err = team_nl_send_event_port_list_get(port->team);
1625 if (err)
1626 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink\n",
1627 port->dev->name);
1628
1629 }
1630
1631 static void team_port_change_check(struct team_port *port, bool linkup)
1632 {
1633 struct team *team = port->team;
1634
1635 mutex_lock(&team->lock);
1636 __team_port_change_check(port, linkup);
1637 mutex_unlock(&team->lock);
1638 }
1639
1640 /************************************
1641 * Net device notifier event handler
1642 ************************************/
1643
1644 static int team_device_event(struct notifier_block *unused,
1645 unsigned long event, void *ptr)
1646 {
1647 struct net_device *dev = (struct net_device *) ptr;
1648 struct team_port *port;
1649
1650 port = team_port_get_rtnl(dev);
1651 if (!port)
1652 return NOTIFY_DONE;
1653
1654 switch (event) {
1655 case NETDEV_UP:
1656 if (netif_carrier_ok(dev))
1657 team_port_change_check(port, true);
1658 case NETDEV_DOWN:
1659 team_port_change_check(port, false);
1660 case NETDEV_CHANGE:
1661 if (netif_running(port->dev))
1662 team_port_change_check(port,
1663 !!netif_carrier_ok(port->dev));
1664 break;
1665 case NETDEV_UNREGISTER:
1666 team_del_slave(port->team->dev, dev);
1667 break;
1668 case NETDEV_FEAT_CHANGE:
1669 team_compute_features(port->team);
1670 break;
1671 case NETDEV_CHANGEMTU:
1672 /* Forbid to change mtu of underlaying device */
1673 return NOTIFY_BAD;
1674 case NETDEV_PRE_TYPE_CHANGE:
1675 /* Forbid to change type of underlaying device */
1676 return NOTIFY_BAD;
1677 }
1678 return NOTIFY_DONE;
1679 }
1680
1681 static struct notifier_block team_notifier_block __read_mostly = {
1682 .notifier_call = team_device_event,
1683 };
1684
1685
1686 /***********************
1687 * Module init and exit
1688 ***********************/
1689
1690 static int __init team_module_init(void)
1691 {
1692 int err;
1693
1694 register_netdevice_notifier(&team_notifier_block);
1695
1696 err = rtnl_link_register(&team_link_ops);
1697 if (err)
1698 goto err_rtnl_reg;
1699
1700 err = team_nl_init();
1701 if (err)
1702 goto err_nl_init;
1703
1704 return 0;
1705
1706 err_nl_init:
1707 rtnl_link_unregister(&team_link_ops);
1708
1709 err_rtnl_reg:
1710 unregister_netdevice_notifier(&team_notifier_block);
1711
1712 return err;
1713 }
1714
1715 static void __exit team_module_exit(void)
1716 {
1717 team_nl_fini();
1718 rtnl_link_unregister(&team_link_ops);
1719 unregister_netdevice_notifier(&team_notifier_block);
1720 }
1721
1722 module_init(team_module_init);
1723 module_exit(team_module_exit);
1724
1725 MODULE_LICENSE("GPL v2");
1726 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
1727 MODULE_DESCRIPTION("Ethernet team device driver");
1728 MODULE_ALIAS_RTNL_LINK(DRV_NAME);