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6LoWPAN: double free in lowpan_fragment_xmit()
[linux-2.6-block.git] / drivers / net / team / team.c
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3d249d4c
JP		 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_arp.h>
22#include <linux/socket.h>
23#include <linux/etherdevice.h>
24#include <linux/rtnetlink.h>
25#include <net/rtnetlink.h>
26#include <net/genetlink.h>
27#include <net/netlink.h>
28#include <linux/if_team.h>
29
30#define DRV_NAME "team"
31
32
33/**********
34 * Helpers
35 **********/
36
37#define team_port_exists(dev) (dev->priv_flags & IFF_TEAM_PORT)
38
39static struct team_port *team_port_get_rcu(const struct net_device *dev)
40{
41 struct team_port *port = rcu_dereference(dev->rx_handler_data);
42
43 return team_port_exists(dev) ? port : NULL;
44}
45
46static struct team_port *team_port_get_rtnl(const struct net_device *dev)
47{
48 struct team_port *port = rtnl_dereference(dev->rx_handler_data);
49
50 return team_port_exists(dev) ? port : NULL;
51}
52
53/*
54 * Since the ability to change mac address for open port device is tested in
55 * team_port_add, this function can be called without control of return value
56 */
57static int __set_port_mac(struct net_device *port_dev,
58 const unsigned char *dev_addr)
59{
60 struct sockaddr addr;
61
62 memcpy(addr.sa_data, dev_addr, ETH_ALEN);
63 addr.sa_family = ARPHRD_ETHER;
64 return dev_set_mac_address(port_dev, &addr);
65}
66
67int team_port_set_orig_mac(struct team_port *port)
68{
69 return __set_port_mac(port->dev, port->orig.dev_addr);
70}
71
72int team_port_set_team_mac(struct team_port *port)
73{
74 return __set_port_mac(port->dev, port->team->dev->dev_addr);
75}
76EXPORT_SYMBOL(team_port_set_team_mac);
77
78
79/*******************
80 * Options handling
81 *******************/
82
83void team_options_register(struct team *team, struct team_option *option,
84 size_t option_count)
85{
86 int i;
87
88 for (i = 0; i < option_count; i++, option++)
89 list_add_tail(&option->list, &team->option_list);
90}
91EXPORT_SYMBOL(team_options_register);
92
93static void __team_options_change_check(struct team *team,
94 struct team_option *changed_option);
95
96static void __team_options_unregister(struct team *team,
97 struct team_option *option,
98 size_t option_count)
99{
100 int i;
101
102 for (i = 0; i < option_count; i++, option++)
103 list_del(&option->list);
104}
105
106void team_options_unregister(struct team *team, struct team_option *option,
107 size_t option_count)
108{
109 __team_options_unregister(team, option, option_count);
110 __team_options_change_check(team, NULL);
111}
112EXPORT_SYMBOL(team_options_unregister);
113
114static int team_option_get(struct team *team, struct team_option *option,
115 void *arg)
116{
117 return option->getter(team, arg);
118}
119
120static int team_option_set(struct team *team, struct team_option *option,
121 void *arg)
122{
123 int err;
124
125 err = option->setter(team, arg);
126 if (err)
127 return err;
128
129 __team_options_change_check(team, option);
130 return err;
131}
132
133/****************
134 * Mode handling
135 ****************/
136
137static LIST_HEAD(mode_list);
138static DEFINE_SPINLOCK(mode_list_lock);
139
140static struct team_mode *__find_mode(const char *kind)
141{
142 struct team_mode *mode;
143
144 list_for_each_entry(mode, &mode_list, list) {
145 if (strcmp(mode->kind, kind) == 0)
146 return mode;
147 }
148 return NULL;
149}
150
151static bool is_good_mode_name(const char *name)
152{
153 while (*name != '\0') {
154 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
155 return false;
156 name++;
157 }
158 return true;
159}
160
161int team_mode_register(struct team_mode *mode)
162{
163 int err = 0;
164
165 if (!is_good_mode_name(mode->kind) ||
166 mode->priv_size > TEAM_MODE_PRIV_SIZE)
167 return -EINVAL;
168 spin_lock(&mode_list_lock);
169 if (__find_mode(mode->kind)) {
170 err = -EEXIST;
171 goto unlock;
172 }
173 list_add_tail(&mode->list, &mode_list);
174unlock:
175 spin_unlock(&mode_list_lock);
176 return err;
177}
178EXPORT_SYMBOL(team_mode_register);
179
180int team_mode_unregister(struct team_mode *mode)
181{
182 spin_lock(&mode_list_lock);
183 list_del_init(&mode->list);
184 spin_unlock(&mode_list_lock);
185 return 0;
186}
187EXPORT_SYMBOL(team_mode_unregister);
188
189static struct team_mode *team_mode_get(const char *kind)
190{
191 struct team_mode *mode;
192
193 spin_lock(&mode_list_lock);
194 mode = __find_mode(kind);
195 if (!mode) {
196 spin_unlock(&mode_list_lock);
197 request_module("team-mode-%s", kind);
198 spin_lock(&mode_list_lock);
199 mode = __find_mode(kind);
200 }
201 if (mode)
202 if (!try_module_get(mode->owner))
203 mode = NULL;
204
205 spin_unlock(&mode_list_lock);
206 return mode;
207}
208
209static void team_mode_put(const struct team_mode *mode)
210{
211 module_put(mode->owner);
212}
213
214static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
215{
216 dev_kfree_skb_any(skb);
217 return false;
218}
219
220rx_handler_result_t team_dummy_receive(struct team *team,
221 struct team_port *port,
222 struct sk_buff *skb)
223{
224 return RX_HANDLER_ANOTHER;
225}
226
227static void team_adjust_ops(struct team *team)
228{
229 /*
230 * To avoid checks in rx/tx skb paths, ensure here that non-null and
231 * correct ops are always set.
232 */
233
234 if (list_empty(&team->port_list) ||
235 !team->mode || !team->mode->ops->transmit)
236 team->ops.transmit = team_dummy_transmit;
237 else
238 team->ops.transmit = team->mode->ops->transmit;
239
240 if (list_empty(&team->port_list) ||
241 !team->mode || !team->mode->ops->receive)
242 team->ops.receive = team_dummy_receive;
243 else
244 team->ops.receive = team->mode->ops->receive;
245}
246
247/*
248 * We can benefit from the fact that it's ensured no port is present
249 * at the time of mode change. Therefore no packets are in fly so there's no
250 * need to set mode operations in any special way.
251 */
252static int __team_change_mode(struct team *team,
253 const struct team_mode *new_mode)
254{
255 /* Check if mode was previously set and do cleanup if so */
256 if (team->mode) {
257 void (*exit_op)(struct team *team) = team->ops.exit;
258
259 /* Clear ops area so no callback is called any longer */
260 memset(&team->ops, 0, sizeof(struct team_mode_ops));
261 team_adjust_ops(team);
262
263 if (exit_op)
264 exit_op(team);
265 team_mode_put(team->mode);
266 team->mode = NULL;
267 /* zero private data area */
268 memset(&team->mode_priv, 0,
269 sizeof(struct team) - offsetof(struct team, mode_priv));
270 }
271
272 if (!new_mode)
273 return 0;
274
275 if (new_mode->ops->init) {
276 int err;
277
278 err = new_mode->ops->init(team);
279 if (err)
280 return err;
281 }
282
283 team->mode = new_mode;
284 memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
285 team_adjust_ops(team);
286
287 return 0;
288}
289
290static int team_change_mode(struct team *team, const char *kind)
291{
292 struct team_mode *new_mode;
293 struct net_device *dev = team->dev;
294 int err;
295
296 if (!list_empty(&team->port_list)) {
297 netdev_err(dev, "No ports can be present during mode change\n");
298 return -EBUSY;
299 }
300
301 if (team->mode && strcmp(team->mode->kind, kind) == 0) {
302 netdev_err(dev, "Unable to change to the same mode the team is in\n");
303 return -EINVAL;
304 }
305
306 new_mode = team_mode_get(kind);
307 if (!new_mode) {
308 netdev_err(dev, "Mode \"%s\" not found\n", kind);
309 return -EINVAL;
310 }
311
312 err = __team_change_mode(team, new_mode);
313 if (err) {
314 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
315 team_mode_put(new_mode);
316 return err;
317 }
318
319 netdev_info(dev, "Mode changed to \"%s\"\n", kind);
320 return 0;
321}
322
323
324/************************
325 * Rx path frame handler
326 ************************/
327
328/* note: already called with rcu_read_lock */
329static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
330{
331 struct sk_buff *skb = *pskb;
332 struct team_port *port;
333 struct team *team;
334 rx_handler_result_t res;
335
336 skb = skb_share_check(skb, GFP_ATOMIC);
337 if (!skb)
338 return RX_HANDLER_CONSUMED;
339
340 *pskb = skb;
341
342 port = team_port_get_rcu(skb->dev);
343 team = port->team;
344
345 res = team->ops.receive(team, port, skb);
346 if (res == RX_HANDLER_ANOTHER) {
347 struct team_pcpu_stats *pcpu_stats;
348
349 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
350 u64_stats_update_begin(&pcpu_stats->syncp);
351 pcpu_stats->rx_packets++;
352 pcpu_stats->rx_bytes += skb->len;
353 if (skb->pkt_type == PACKET_MULTICAST)
354 pcpu_stats->rx_multicast++;
355 u64_stats_update_end(&pcpu_stats->syncp);
356
357 skb->dev = team->dev;
358 } else {
359 this_cpu_inc(team->pcpu_stats->rx_dropped);
360 }
361
362 return res;
363}
364
365
366/****************
367 * Port handling
368 ****************/
369
370static bool team_port_find(const struct team *team,
371 const struct team_port *port)
372{
373 struct team_port *cur;
374
375 list_for_each_entry(cur, &team->port_list, list)
376 if (cur == port)
377 return true;
378 return false;
379}
380
381/*
382 * Add/delete port to the team port list. Write guarded by rtnl_lock.
383 * Takes care of correct port->index setup (might be racy).
384 */
385static void team_port_list_add_port(struct team *team,
386 struct team_port *port)
387{
388 port->index = team->port_count++;
389 hlist_add_head_rcu(&port->hlist,
390 team_port_index_hash(team, port->index));
391 list_add_tail_rcu(&port->list, &team->port_list);
392}
393
394static void __reconstruct_port_hlist(struct team *team, int rm_index)
395{
396 int i;
397 struct team_port *port;
398
399 for (i = rm_index + 1; i < team->port_count; i++) {
400 port = team_get_port_by_index(team, i);
401 hlist_del_rcu(&port->hlist);
402 port->index--;
403 hlist_add_head_rcu(&port->hlist,
404 team_port_index_hash(team, port->index));
405 }
406}
407
408static void team_port_list_del_port(struct team *team,
409 struct team_port *port)
410{
411 int rm_index = port->index;
412
413 hlist_del_rcu(&port->hlist);
414 list_del_rcu(&port->list);
415 __reconstruct_port_hlist(team, rm_index);
416 team->port_count--;
417}
418
419#define TEAM_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \
420 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
421 NETIF_F_HIGHDMA | NETIF_F_LRO)
422
423static void __team_compute_features(struct team *team)
424{
425 struct team_port *port;
426 u32 vlan_features = TEAM_VLAN_FEATURES;
427 unsigned short max_hard_header_len = ETH_HLEN;
428
429 list_for_each_entry(port, &team->port_list, list) {
430 vlan_features = netdev_increment_features(vlan_features,
431 port->dev->vlan_features,
432 TEAM_VLAN_FEATURES);
433
434 if (port->dev->hard_header_len > max_hard_header_len)
435 max_hard_header_len = port->dev->hard_header_len;
436 }
437
438 team->dev->vlan_features = vlan_features;
439 team->dev->hard_header_len = max_hard_header_len;
440
441 netdev_change_features(team->dev);
442}
443
444static void team_compute_features(struct team *team)
445{
446 spin_lock(&team->lock);
447 __team_compute_features(team);
448 spin_unlock(&team->lock);
449}
450
451static int team_port_enter(struct team *team, struct team_port *port)
452{
453 int err = 0;
454
455 dev_hold(team->dev);
456 port->dev->priv_flags |= IFF_TEAM_PORT;
457 if (team->ops.port_enter) {
458 err = team->ops.port_enter(team, port);
459 if (err) {
460 netdev_err(team->dev, "Device %s failed to enter team mode\n",
461 port->dev->name);
462 goto err_port_enter;
463 }
464 }
465
466 return 0;
467
468err_port_enter:
469 port->dev->priv_flags &= ~IFF_TEAM_PORT;
470 dev_put(team->dev);
471
472 return err;
473}
474
475static void team_port_leave(struct team *team, struct team_port *port)
476{
477 if (team->ops.port_leave)
478 team->ops.port_leave(team, port);
479 port->dev->priv_flags &= ~IFF_TEAM_PORT;
480 dev_put(team->dev);
481}
482
483static void __team_port_change_check(struct team_port *port, bool linkup);
484
485static int team_port_add(struct team *team, struct net_device *port_dev)
486{
487 struct net_device *dev = team->dev;
488 struct team_port *port;
489 char *portname = port_dev->name;
490 int err;
491
492 if (port_dev->flags & IFF_LOOPBACK ||
493 port_dev->type != ARPHRD_ETHER) {
494 netdev_err(dev, "Device %s is of an unsupported type\n",
495 portname);
496 return -EINVAL;
497 }
498
499 if (team_port_exists(port_dev)) {
500 netdev_err(dev, "Device %s is already a port "
501 "of a team device\n", portname);
502 return -EBUSY;
503 }
504
505 if (port_dev->flags & IFF_UP) {
506 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
507 portname);
508 return -EBUSY;
509 }
510
511 port = kzalloc(sizeof(struct team_port), GFP_KERNEL);
512 if (!port)
513 return -ENOMEM;
514
515 port->dev = port_dev;
516 port->team = team;
517
518 port->orig.mtu = port_dev->mtu;
519 err = dev_set_mtu(port_dev, dev->mtu);
520 if (err) {
521 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
522 goto err_set_mtu;
523 }
524
525 memcpy(port->orig.dev_addr, port_dev->dev_addr, ETH_ALEN);
526
527 err = team_port_enter(team, port);
528 if (err) {
529 netdev_err(dev, "Device %s failed to enter team mode\n",
530 portname);
531 goto err_port_enter;
532 }
533
534 err = dev_open(port_dev);
535 if (err) {
536 netdev_dbg(dev, "Device %s opening failed\n",
537 portname);
538 goto err_dev_open;
539 }
540
541 err = netdev_set_master(port_dev, dev);
542 if (err) {
543 netdev_err(dev, "Device %s failed to set master\n", portname);
544 goto err_set_master;
545 }
546
547 err = netdev_rx_handler_register(port_dev, team_handle_frame,
548 port);
549 if (err) {
550 netdev_err(dev, "Device %s failed to register rx_handler\n",
551 portname);
552 goto err_handler_register;
553 }
554
555 team_port_list_add_port(team, port);
556 team_adjust_ops(team);
557 __team_compute_features(team);
558 __team_port_change_check(port, !!netif_carrier_ok(port_dev));
559
560 netdev_info(dev, "Port device %s added\n", portname);
561
562 return 0;
563
564err_handler_register:
565 netdev_set_master(port_dev, NULL);
566
567err_set_master:
568 dev_close(port_dev);
569
570err_dev_open:
571 team_port_leave(team, port);
572 team_port_set_orig_mac(port);
573
574err_port_enter:
575 dev_set_mtu(port_dev, port->orig.mtu);
576
577err_set_mtu:
578 kfree(port);
579
580 return err;
581}
582
583static int team_port_del(struct team *team, struct net_device *port_dev)
584{
585 struct net_device *dev = team->dev;
586 struct team_port *port;
587 char *portname = port_dev->name;
588
589 port = team_port_get_rtnl(port_dev);
590 if (!port || !team_port_find(team, port)) {
591 netdev_err(dev, "Device %s does not act as a port of this team\n",
592 portname);
593 return -ENOENT;
594 }
595
596 __team_port_change_check(port, false);
597 team_port_list_del_port(team, port);
598 team_adjust_ops(team);
599 netdev_rx_handler_unregister(port_dev);
600 netdev_set_master(port_dev, NULL);
601 dev_close(port_dev);
602 team_port_leave(team, port);
603 team_port_set_orig_mac(port);
604 dev_set_mtu(port_dev, port->orig.mtu);
605 synchronize_rcu();
606 kfree(port);
607 netdev_info(dev, "Port device %s removed\n", portname);
608 __team_compute_features(team);
609
610 return 0;
611}
612
613
614/*****************
615 * Net device ops
616 *****************/
617
618static const char team_no_mode_kind[] = "*NOMODE*";
619
620static int team_mode_option_get(struct team *team, void *arg)
621{
622 const char **str = arg;
623
624 *str = team->mode ? team->mode->kind : team_no_mode_kind;
625 return 0;
626}
627
628static int team_mode_option_set(struct team *team, void *arg)
629{
630 const char **str = arg;
631
632 return team_change_mode(team, *str);
633}
634
635static struct team_option team_options[] = {
636 {
637 .name = "mode",
638 .type = TEAM_OPTION_TYPE_STRING,
639 .getter = team_mode_option_get,
640 .setter = team_mode_option_set,
641 },
642};
643
644static int team_init(struct net_device *dev)
645{
646 struct team *team = netdev_priv(dev);
647 int i;
648
649 team->dev = dev;
650 spin_lock_init(&team->lock);
651
652 team->pcpu_stats = alloc_percpu(struct team_pcpu_stats);
653 if (!team->pcpu_stats)
654 return -ENOMEM;
655
656 for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
657 INIT_HLIST_HEAD(&team->port_hlist[i]);
658 INIT_LIST_HEAD(&team->port_list);
659
660 team_adjust_ops(team);
661
662 INIT_LIST_HEAD(&team->option_list);
663 team_options_register(team, team_options, ARRAY_SIZE(team_options));
664 netif_carrier_off(dev);
665
666 return 0;
667}
668
669static void team_uninit(struct net_device *dev)
670{
671 struct team *team = netdev_priv(dev);
672 struct team_port *port;
673 struct team_port *tmp;
674
675 spin_lock(&team->lock);
676 list_for_each_entry_safe(port, tmp, &team->port_list, list)
677 team_port_del(team, port->dev);
678
679 __team_change_mode(team, NULL); /* cleanup */
680 __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
681 spin_unlock(&team->lock);
682}
683
684static void team_destructor(struct net_device *dev)
685{
686 struct team *team = netdev_priv(dev);
687
688 free_percpu(team->pcpu_stats);
689 free_netdev(dev);
690}
691
692static int team_open(struct net_device *dev)
693{
694 netif_carrier_on(dev);
695 return 0;
696}
697
698static int team_close(struct net_device *dev)
699{
700 netif_carrier_off(dev);
701 return 0;
702}
703
704/*
705 * note: already called with rcu_read_lock
706 */
707static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
708{
709 struct team *team = netdev_priv(dev);
710 bool tx_success = false;
711 unsigned int len = skb->len;
712
713 tx_success = team->ops.transmit(team, skb);
714 if (tx_success) {
715 struct team_pcpu_stats *pcpu_stats;
716
717 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
718 u64_stats_update_begin(&pcpu_stats->syncp);
719 pcpu_stats->tx_packets++;
720 pcpu_stats->tx_bytes += len;
721 u64_stats_update_end(&pcpu_stats->syncp);
722 } else {
723 this_cpu_inc(team->pcpu_stats->tx_dropped);
724 }
725
726 return NETDEV_TX_OK;
727}
728
729static void team_change_rx_flags(struct net_device *dev, int change)
730{
731 struct team *team = netdev_priv(dev);
732 struct team_port *port;
733 int inc;
734
735 rcu_read_lock();
736 list_for_each_entry_rcu(port, &team->port_list, list) {
737 if (change & IFF_PROMISC) {
738 inc = dev->flags & IFF_PROMISC ? 1 : -1;
739 dev_set_promiscuity(port->dev, inc);
740 }
741 if (change & IFF_ALLMULTI) {
742 inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
743 dev_set_allmulti(port->dev, inc);
744 }
745 }
746 rcu_read_unlock();
747}
748
749static void team_set_rx_mode(struct net_device *dev)
750{
751 struct team *team = netdev_priv(dev);
752 struct team_port *port;
753
754 rcu_read_lock();
755 list_for_each_entry_rcu(port, &team->port_list, list) {
756 dev_uc_sync(port->dev, dev);
757 dev_mc_sync(port->dev, dev);
758 }
759 rcu_read_unlock();
760}
761
762static int team_set_mac_address(struct net_device *dev, void *p)
763{
764 struct team *team = netdev_priv(dev);
765 struct team_port *port;
766 struct sockaddr *addr = p;
767
768 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
769 rcu_read_lock();
770 list_for_each_entry_rcu(port, &team->port_list, list)
771 if (team->ops.port_change_mac)
772 team->ops.port_change_mac(team, port);
773 rcu_read_unlock();
774 return 0;
775}
776
777static int team_change_mtu(struct net_device *dev, int new_mtu)
778{
779 struct team *team = netdev_priv(dev);
780 struct team_port *port;
781 int err;
782
783 /*
784 * Alhough this is reader, it's guarded by team lock. It's not possible
785 * to traverse list in reverse under rcu_read_lock
786 */
787 spin_lock(&team->lock);
788 list_for_each_entry(port, &team->port_list, list) {
789 err = dev_set_mtu(port->dev, new_mtu);
790 if (err) {
791 netdev_err(dev, "Device %s failed to change mtu",
792 port->dev->name);
793 goto unwind;
794 }
795 }
796 spin_unlock(&team->lock);
797
798 dev->mtu = new_mtu;
799
800 return 0;
801
802unwind:
803 list_for_each_entry_continue_reverse(port, &team->port_list, list)
804 dev_set_mtu(port->dev, dev->mtu);
805 spin_unlock(&team->lock);
806
807 return err;
808}
809
810static struct rtnl_link_stats64 *
811team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
812{
813 struct team *team = netdev_priv(dev);
814 struct team_pcpu_stats *p;
815 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
816 u32 rx_dropped = 0, tx_dropped = 0;
817 unsigned int start;
818 int i;
819
820 for_each_possible_cpu(i) {
821 p = per_cpu_ptr(team->pcpu_stats, i);
822 do {
823 start = u64_stats_fetch_begin_bh(&p->syncp);
824 rx_packets = p->rx_packets;
825 rx_bytes = p->rx_bytes;
826 rx_multicast = p->rx_multicast;
827 tx_packets = p->tx_packets;
828 tx_bytes = p->tx_bytes;
829 } while (u64_stats_fetch_retry_bh(&p->syncp, start));
830
831 stats->rx_packets += rx_packets;
832 stats->rx_bytes += rx_bytes;
833 stats->multicast += rx_multicast;
834 stats->tx_packets += tx_packets;
835 stats->tx_bytes += tx_bytes;
836 /*
837 * rx_dropped & tx_dropped are u32, updated
838 * without syncp protection.
839 */
840 rx_dropped += p->rx_dropped;
841 tx_dropped += p->tx_dropped;
842 }
843 stats->rx_dropped = rx_dropped;
844 stats->tx_dropped = tx_dropped;
845 return stats;
846}
847
848static void team_vlan_rx_add_vid(struct net_device *dev, uint16_t vid)
849{
850 struct team *team = netdev_priv(dev);
851 struct team_port *port;
852
853 rcu_read_lock();
854 list_for_each_entry_rcu(port, &team->port_list, list) {
855 const struct net_device_ops *ops = port->dev->netdev_ops;
856
857 if (ops->ndo_vlan_rx_add_vid)
858 ops->ndo_vlan_rx_add_vid(port->dev, vid);
859 }
860 rcu_read_unlock();
861}
862
863static void team_vlan_rx_kill_vid(struct net_device *dev, uint16_t vid)
864{
865 struct team *team = netdev_priv(dev);
866 struct team_port *port;
867
868 rcu_read_lock();
869 list_for_each_entry_rcu(port, &team->port_list, list) {
870 const struct net_device_ops *ops = port->dev->netdev_ops;
871
872 if (ops->ndo_vlan_rx_kill_vid)
873 ops->ndo_vlan_rx_kill_vid(port->dev, vid);
874 }
875 rcu_read_unlock();
876}
877
878static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
879{
880 struct team *team = netdev_priv(dev);
881 int err;
882
883 spin_lock(&team->lock);
884 err = team_port_add(team, port_dev);
885 spin_unlock(&team->lock);
886 return err;
887}
888
889static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
890{
891 struct team *team = netdev_priv(dev);
892 int err;
893
894 spin_lock(&team->lock);
895 err = team_port_del(team, port_dev);
896 spin_unlock(&team->lock);
897 return err;
898}
899
900static const struct net_device_ops team_netdev_ops = {
901 .ndo_init = team_init,
902 .ndo_uninit = team_uninit,
903 .ndo_open = team_open,
904 .ndo_stop = team_close,
905 .ndo_start_xmit = team_xmit,
906 .ndo_change_rx_flags = team_change_rx_flags,
907 .ndo_set_rx_mode = team_set_rx_mode,
908 .ndo_set_mac_address = team_set_mac_address,
909 .ndo_change_mtu = team_change_mtu,
910 .ndo_get_stats64 = team_get_stats64,
911 .ndo_vlan_rx_add_vid = team_vlan_rx_add_vid,
912 .ndo_vlan_rx_kill_vid = team_vlan_rx_kill_vid,
913 .ndo_add_slave = team_add_slave,
914 .ndo_del_slave = team_del_slave,
915};
916
917
918/***********************
919 * rt netlink interface
920 ***********************/
921
922static void team_setup(struct net_device *dev)
923{
924 ether_setup(dev);
925
926 dev->netdev_ops = &team_netdev_ops;
927 dev->destructor = team_destructor;
928 dev->tx_queue_len = 0;
929 dev->flags |= IFF_MULTICAST;
930 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
931
932 /*
933 * Indicate we support unicast address filtering. That way core won't
934 * bring us to promisc mode in case a unicast addr is added.
935 * Let this up to underlay drivers.
936 */
937 dev->priv_flags |= IFF_UNICAST_FLT;
938
939 dev->features |= NETIF_F_LLTX;
940 dev->features |= NETIF_F_GRO;
941 dev->hw_features = NETIF_F_HW_VLAN_TX |
942 NETIF_F_HW_VLAN_RX |
943 NETIF_F_HW_VLAN_FILTER;
944
945 dev->features |= dev->hw_features;
946}
947
948static int team_newlink(struct net *src_net, struct net_device *dev,
949 struct nlattr *tb[], struct nlattr *data[])
950{
951 int err;
952
953 if (tb[IFLA_ADDRESS] == NULL)
954 random_ether_addr(dev->dev_addr);
955
956 err = register_netdevice(dev);
957 if (err)
958 return err;
959
960 return 0;
961}
962
963static int team_validate(struct nlattr *tb[], struct nlattr *data[])
964{
965 if (tb[IFLA_ADDRESS]) {
966 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
967 return -EINVAL;
968 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
969 return -EADDRNOTAVAIL;
970 }
971 return 0;
972}
973
974static struct rtnl_link_ops team_link_ops __read_mostly = {
975 .kind = DRV_NAME,
976 .priv_size = sizeof(struct team),
977 .setup = team_setup,
978 .newlink = team_newlink,
979 .validate = team_validate,
980};
981
982
983/***********************************
984 * Generic netlink custom interface
985 ***********************************/
986
987static struct genl_family team_nl_family = {
988 .id = GENL_ID_GENERATE,
989 .name = TEAM_GENL_NAME,
990 .version = TEAM_GENL_VERSION,
991 .maxattr = TEAM_ATTR_MAX,
992 .netnsok = true,
993};
994
995static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
996 [TEAM_ATTR_UNSPEC] = { .type = NLA_UNSPEC, },
997 [TEAM_ATTR_TEAM_IFINDEX] = { .type = NLA_U32 },
998 [TEAM_ATTR_LIST_OPTION] = { .type = NLA_NESTED },
999 [TEAM_ATTR_LIST_PORT] = { .type = NLA_NESTED },
1000};
1001
1002static const struct nla_policy
1003team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
1004 [TEAM_ATTR_OPTION_UNSPEC] = { .type = NLA_UNSPEC, },
1005 [TEAM_ATTR_OPTION_NAME] = {
1006 .type = NLA_STRING,
1007 .len = TEAM_STRING_MAX_LEN,
1008 },
1009 [TEAM_ATTR_OPTION_CHANGED] = { .type = NLA_FLAG },
1010 [TEAM_ATTR_OPTION_TYPE] = { .type = NLA_U8 },
1011 [TEAM_ATTR_OPTION_DATA] = {
1012 .type = NLA_BINARY,
1013 .len = TEAM_STRING_MAX_LEN,
1014 },
1015};
1016
1017static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
1018{
1019 struct sk_buff *msg;
1020 void *hdr;
1021 int err;
1022
1023 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1024 if (!msg)
1025 return -ENOMEM;
1026
1027 hdr = genlmsg_put(msg, info->snd_pid, info->snd_seq,
1028 &team_nl_family, 0, TEAM_CMD_NOOP);
1029 if (IS_ERR(hdr)) {
1030 err = PTR_ERR(hdr);
1031 goto err_msg_put;
1032 }
1033
1034 genlmsg_end(msg, hdr);
1035
1036 return genlmsg_unicast(genl_info_net(info), msg, info->snd_pid);
1037
1038err_msg_put:
1039 nlmsg_free(msg);
1040
1041 return err;
1042}
1043
1044/*
1045 * Netlink cmd functions should be locked by following two functions.
1046 * To ensure team_uninit would not be called in between, hold rcu_read_lock
1047 * all the time.
1048 */
1049static struct team *team_nl_team_get(struct genl_info *info)
1050{
1051 struct net *net = genl_info_net(info);
1052 int ifindex;
1053 struct net_device *dev;
1054 struct team *team;
1055
1056 if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
1057 return NULL;
1058
1059 ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
1060 rcu_read_lock();
1061 dev = dev_get_by_index_rcu(net, ifindex);
1062 if (!dev || dev->netdev_ops != &team_netdev_ops) {
1063 rcu_read_unlock();
1064 return NULL;
1065 }
1066
1067 team = netdev_priv(dev);
1068 spin_lock(&team->lock);
1069 return team;
1070}
1071
1072static void team_nl_team_put(struct team *team)
1073{
1074 spin_unlock(&team->lock);
1075 rcu_read_unlock();
1076}
1077
1078static int team_nl_send_generic(struct genl_info *info, struct team *team,
1079 int (*fill_func)(struct sk_buff *skb,
1080 struct genl_info *info,
1081 int flags, struct team *team))
1082{
1083 struct sk_buff *skb;
1084 int err;
1085
1086 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1087 if (!skb)
1088 return -ENOMEM;
1089
1090 err = fill_func(skb, info, NLM_F_ACK, team);
1091 if (err < 0)
1092 goto err_fill;
1093
1094 err = genlmsg_unicast(genl_info_net(info), skb, info->snd_pid);
1095 return err;
1096
1097err_fill:
1098 nlmsg_free(skb);
1099 return err;
1100}
1101
1102static int team_nl_fill_options_get_changed(struct sk_buff *skb,
1103 u32 pid, u32 seq, int flags,
1104 struct team *team,
1105 struct team_option *changed_option)
1106{
1107 struct nlattr *option_list;
1108 void *hdr;
1109 struct team_option *option;
1110
1111 hdr = genlmsg_put(skb, pid, seq, &team_nl_family, flags,
1112 TEAM_CMD_OPTIONS_GET);
1113 if (IS_ERR(hdr))
1114 return PTR_ERR(hdr);
1115
1116 NLA_PUT_U32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex);
1117 option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
1118 if (!option_list)
1119 return -EMSGSIZE;
1120
1121 list_for_each_entry(option, &team->option_list, list) {
1122 struct nlattr *option_item;
1123 long arg;
1124
1125 option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
1126 if (!option_item)
1127 goto nla_put_failure;
1128 NLA_PUT_STRING(skb, TEAM_ATTR_OPTION_NAME, option->name);
1129 if (option == changed_option)
1130 NLA_PUT_FLAG(skb, TEAM_ATTR_OPTION_CHANGED);
1131 switch (option->type) {
1132 case TEAM_OPTION_TYPE_U32:
1133 NLA_PUT_U8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32);
1134 team_option_get(team, option, &arg);
1135 NLA_PUT_U32(skb, TEAM_ATTR_OPTION_DATA, arg);
1136 break;
1137 case TEAM_OPTION_TYPE_STRING:
1138 NLA_PUT_U8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING);
1139 team_option_get(team, option, &arg);
1140 NLA_PUT_STRING(skb, TEAM_ATTR_OPTION_DATA,
1141 (char *) arg);
1142 break;
1143 default:
1144 BUG();
1145 }
1146 nla_nest_end(skb, option_item);
1147 }
1148
1149 nla_nest_end(skb, option_list);
1150 return genlmsg_end(skb, hdr);
1151
1152nla_put_failure:
1153 genlmsg_cancel(skb, hdr);
1154 return -EMSGSIZE;
1155}
1156
1157static int team_nl_fill_options_get(struct sk_buff *skb,
1158 struct genl_info *info, int flags,
1159 struct team *team)
1160{
1161 return team_nl_fill_options_get_changed(skb, info->snd_pid,
1162 info->snd_seq, NLM_F_ACK,
1163 team, NULL);
1164}
1165
1166static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
1167{
1168 struct team *team;
1169 int err;
1170
1171 team = team_nl_team_get(info);
1172 if (!team)
1173 return -EINVAL;
1174
1175 err = team_nl_send_generic(info, team, team_nl_fill_options_get);
1176
1177 team_nl_team_put(team);
1178
1179 return err;
1180}
1181
1182static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
1183{
1184 struct team *team;
1185 int err = 0;
1186 int i;
1187 struct nlattr *nl_option;
1188
1189 team = team_nl_team_get(info);
1190 if (!team)
1191 return -EINVAL;
1192
1193 err = -EINVAL;
1194 if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
1195 err = -EINVAL;
1196 goto team_put;
1197 }
1198
1199 nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
1200 struct nlattr *mode_attrs[TEAM_ATTR_OPTION_MAX + 1];
1201 enum team_option_type opt_type;
1202 struct team_option *option;
1203 char *opt_name;
1204 bool opt_found = false;
1205
1206 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
1207 err = -EINVAL;
1208 goto team_put;
1209 }
1210 err = nla_parse_nested(mode_attrs, TEAM_ATTR_OPTION_MAX,
1211 nl_option, team_nl_option_policy);
1212 if (err)
1213 goto team_put;
1214 if (!mode_attrs[TEAM_ATTR_OPTION_NAME] ||
1215 !mode_attrs[TEAM_ATTR_OPTION_TYPE] ||
1216 !mode_attrs[TEAM_ATTR_OPTION_DATA]) {
1217 err = -EINVAL;
1218 goto team_put;
1219 }
1220 switch (nla_get_u8(mode_attrs[TEAM_ATTR_OPTION_TYPE])) {
1221 case NLA_U32:
1222 opt_type = TEAM_OPTION_TYPE_U32;
1223 break;
1224 case NLA_STRING:
1225 opt_type = TEAM_OPTION_TYPE_STRING;
1226 break;
1227 default:
1228 goto team_put;
1229 }
1230
1231 opt_name = nla_data(mode_attrs[TEAM_ATTR_OPTION_NAME]);
1232 list_for_each_entry(option, &team->option_list, list) {
1233 long arg;
1234 struct nlattr *opt_data_attr;
1235
1236 if (option->type != opt_type ||
1237 strcmp(option->name, opt_name))
1238 continue;
1239 opt_found = true;
1240 opt_data_attr = mode_attrs[TEAM_ATTR_OPTION_DATA];
1241 switch (opt_type) {
1242 case TEAM_OPTION_TYPE_U32:
1243 arg = nla_get_u32(opt_data_attr);
1244 break;
1245 case TEAM_OPTION_TYPE_STRING:
1246 arg = (long) nla_data(opt_data_attr);
1247 break;
1248 default:
1249 BUG();
1250 }
1251 err = team_option_set(team, option, &arg);
1252 if (err)
1253 goto team_put;
1254 }
1255 if (!opt_found) {
1256 err = -ENOENT;
1257 goto team_put;
1258 }
1259 }
1260
1261team_put:
1262 team_nl_team_put(team);
1263
1264 return err;
1265}
1266
1267static int team_nl_fill_port_list_get_changed(struct sk_buff *skb,
1268 u32 pid, u32 seq, int flags,
1269 struct team *team,
1270 struct team_port *changed_port)
1271{
1272 struct nlattr *port_list;
1273 void *hdr;
1274 struct team_port *port;
1275
1276 hdr = genlmsg_put(skb, pid, seq, &team_nl_family, flags,
1277 TEAM_CMD_PORT_LIST_GET);
1278 if (IS_ERR(hdr))
1279 return PTR_ERR(hdr);
1280
1281 NLA_PUT_U32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex);
1282 port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
1283 if (!port_list)
1284 return -EMSGSIZE;
1285
1286 list_for_each_entry(port, &team->port_list, list) {
1287 struct nlattr *port_item;
1288
1289 port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
1290 if (!port_item)
1291 goto nla_put_failure;
1292 NLA_PUT_U32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex);
1293 if (port == changed_port)
1294 NLA_PUT_FLAG(skb, TEAM_ATTR_PORT_CHANGED);
1295 if (port->linkup)
1296 NLA_PUT_FLAG(skb, TEAM_ATTR_PORT_LINKUP);
1297 NLA_PUT_U32(skb, TEAM_ATTR_PORT_SPEED, port->speed);
1298 NLA_PUT_U8(skb, TEAM_ATTR_PORT_DUPLEX, port->duplex);
1299 nla_nest_end(skb, port_item);
1300 }
1301
1302 nla_nest_end(skb, port_list);
1303 return genlmsg_end(skb, hdr);
1304
1305nla_put_failure:
1306 genlmsg_cancel(skb, hdr);
1307 return -EMSGSIZE;
1308}
1309
1310static int team_nl_fill_port_list_get(struct sk_buff *skb,
1311 struct genl_info *info, int flags,
1312 struct team *team)
1313{
1314 return team_nl_fill_port_list_get_changed(skb, info->snd_pid,
1315 info->snd_seq, NLM_F_ACK,
1316 team, NULL);
1317}
1318
1319static int team_nl_cmd_port_list_get(struct sk_buff *skb,
1320 struct genl_info *info)
1321{
1322 struct team *team;
1323 int err;
1324
1325 team = team_nl_team_get(info);
1326 if (!team)
1327 return -EINVAL;
1328
1329 err = team_nl_send_generic(info, team, team_nl_fill_port_list_get);
1330
1331 team_nl_team_put(team);
1332
1333 return err;
1334}
1335
1336static struct genl_ops team_nl_ops[] = {
1337 {
1338 .cmd = TEAM_CMD_NOOP,
1339 .doit = team_nl_cmd_noop,
1340 .policy = team_nl_policy,
1341 },
1342 {
1343 .cmd = TEAM_CMD_OPTIONS_SET,
1344 .doit = team_nl_cmd_options_set,
1345 .policy = team_nl_policy,
1346 .flags = GENL_ADMIN_PERM,
1347 },
1348 {
1349 .cmd = TEAM_CMD_OPTIONS_GET,
1350 .doit = team_nl_cmd_options_get,
1351 .policy = team_nl_policy,
1352 .flags = GENL_ADMIN_PERM,
1353 },
1354 {
1355 .cmd = TEAM_CMD_PORT_LIST_GET,
1356 .doit = team_nl_cmd_port_list_get,
1357 .policy = team_nl_policy,
1358 .flags = GENL_ADMIN_PERM,
1359 },
1360};
1361
1362static struct genl_multicast_group team_change_event_mcgrp = {
1363 .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME,
1364};
1365
1366static int team_nl_send_event_options_get(struct team *team,
1367 struct team_option *changed_option)
1368{
1369 struct sk_buff *skb;
1370 int err;
1371 struct net *net = dev_net(team->dev);
1372
1373 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1374 if (!skb)
1375 return -ENOMEM;
1376
1377 err = team_nl_fill_options_get_changed(skb, 0, 0, 0, team,
1378 changed_option);
1379 if (err < 0)
1380 goto err_fill;
1381
1382 err = genlmsg_multicast_netns(net, skb, 0, team_change_event_mcgrp.id,
1383 GFP_KERNEL);
1384 return err;
1385
1386err_fill:
1387 nlmsg_free(skb);
1388 return err;
1389}
1390
1391static int team_nl_send_event_port_list_get(struct team_port *port)
1392{
1393 struct sk_buff *skb;
1394 int err;
1395 struct net *net = dev_net(port->team->dev);
1396
1397 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1398 if (!skb)
1399 return -ENOMEM;
1400
1401 err = team_nl_fill_port_list_get_changed(skb, 0, 0, 0,
1402 port->team, port);
1403 if (err < 0)
1404 goto err_fill;
1405
1406 err = genlmsg_multicast_netns(net, skb, 0, team_change_event_mcgrp.id,
1407 GFP_KERNEL);
1408 return err;
1409
1410err_fill:
1411 nlmsg_free(skb);
1412 return err;
1413}
1414
1415static int team_nl_init(void)
1416{
1417 int err;
1418
1419 err = genl_register_family_with_ops(&team_nl_family, team_nl_ops,
1420 ARRAY_SIZE(team_nl_ops));
1421 if (err)
1422 return err;
1423
1424 err = genl_register_mc_group(&team_nl_family, &team_change_event_mcgrp);
1425 if (err)
1426 goto err_change_event_grp_reg;
1427
1428 return 0;
1429
1430err_change_event_grp_reg:
1431 genl_unregister_family(&team_nl_family);
1432
1433 return err;
1434}
1435
1436static void team_nl_fini(void)
1437{
1438 genl_unregister_family(&team_nl_family);
1439}
1440
1441
1442/******************
1443 * Change checkers
1444 ******************/
1445
1446static void __team_options_change_check(struct team *team,
1447 struct team_option *changed_option)
1448{
1449 int err;
1450
1451 err = team_nl_send_event_options_get(team, changed_option);
1452 if (err)
1453 netdev_warn(team->dev, "Failed to send options change via netlink\n");
1454}
1455
1456/* rtnl lock is held */
1457static void __team_port_change_check(struct team_port *port, bool linkup)
1458{
1459 int err;
1460
1461 if (port->linkup == linkup)
1462 return;
1463
1464 port->linkup = linkup;
1465 if (linkup) {
1466 struct ethtool_cmd ecmd;
1467
1468 err = __ethtool_get_settings(port->dev, &ecmd);
1469 if (!err) {
1470 port->speed = ethtool_cmd_speed(&ecmd);
1471 port->duplex = ecmd.duplex;
1472 goto send_event;
1473 }
1474 }
1475 port->speed = 0;
1476 port->duplex = 0;
1477
1478send_event:
1479 err = team_nl_send_event_port_list_get(port);
1480 if (err)
1481 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink\n",
1482 port->dev->name);
1483
1484}
1485
1486static void team_port_change_check(struct team_port *port, bool linkup)
1487{
1488 struct team *team = port->team;
1489
1490 spin_lock(&team->lock);
1491 __team_port_change_check(port, linkup);
1492 spin_unlock(&team->lock);
1493}
1494
1495/************************************
1496 * Net device notifier event handler
1497 ************************************/
1498
1499static int team_device_event(struct notifier_block *unused,
1500 unsigned long event, void *ptr)
1501{
1502 struct net_device *dev = (struct net_device *) ptr;
1503 struct team_port *port;
1504
1505 port = team_port_get_rtnl(dev);
1506 if (!port)
1507 return NOTIFY_DONE;
1508
1509 switch (event) {
1510 case NETDEV_UP:
1511 if (netif_carrier_ok(dev))
1512 team_port_change_check(port, true);
1513 case NETDEV_DOWN:
1514 team_port_change_check(port, false);
1515 case NETDEV_CHANGE:
1516 if (netif_running(port->dev))
1517 team_port_change_check(port,
1518 !!netif_carrier_ok(port->dev));
1519 break;
1520 case NETDEV_UNREGISTER:
1521 team_del_slave(port->team->dev, dev);
1522 break;
1523 case NETDEV_FEAT_CHANGE:
1524 team_compute_features(port->team);
1525 break;
1526 case NETDEV_CHANGEMTU:
1527 /* Forbid to change mtu of underlaying device */
1528 return NOTIFY_BAD;
1529 case NETDEV_PRE_TYPE_CHANGE:
1530 /* Forbid to change type of underlaying device */
1531 return NOTIFY_BAD;
1532 }
1533 return NOTIFY_DONE;
1534}
1535
1536static struct notifier_block team_notifier_block __read_mostly = {
1537 .notifier_call = team_device_event,
1538};
1539
1540
1541/***********************
1542 * Module init and exit
1543 ***********************/
1544
1545static int __init team_module_init(void)
1546{
1547 int err;
1548
1549 register_netdevice_notifier(&team_notifier_block);
1550
1551 err = rtnl_link_register(&team_link_ops);
1552 if (err)
1553 goto err_rtnl_reg;
1554
1555 err = team_nl_init();
1556 if (err)
1557 goto err_nl_init;
1558
1559 return 0;
1560
1561err_nl_init:
1562 rtnl_link_unregister(&team_link_ops);
1563
1564err_rtnl_reg:
1565 unregister_netdevice_notifier(&team_notifier_block);
1566
1567 return err;
1568}
1569
1570static void __exit team_module_exit(void)
1571{
1572 team_nl_fini();
1573 rtnl_link_unregister(&team_link_ops);
1574 unregister_netdevice_notifier(&team_notifier_block);
1575}
1576
1577module_init(team_module_init);
1578module_exit(team_module_exit);
1579
1580MODULE_LICENSE("GPL v2");
1581MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
1582MODULE_DESCRIPTION("Ethernet team device driver");
1583MODULE_ALIAS_RTNL_LINK(DRV_NAME);
Linux 6.x block layer and io_uring tree(s)