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Phonet: set the pipe handle using setsockopt
[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
358b8382
JP		 83struct team_option *__team_find_option(struct team *team, const char *opt_name)
84{
85 struct team_option *option;
86
87 list_for_each_entry(option, &team->option_list, list) {
88 if (strcmp(option->name, opt_name) == 0)
89 return option;
90 }
91 return NULL;
92}
93
94int team_options_register(struct team *team,
95 const struct team_option *option,
96 size_t option_count)
3d249d4c
JP		 97{
98 int i;
358b8382
JP		 99 struct team_option *dst_opts[option_count];
100 int err;
3d249d4c 101
358b8382
JP		 102 memset(dst_opts, 0, sizeof(dst_opts));
103 for (i = 0; i < option_count; i++, option++) {
104 struct team_option *dst_opt;
105
106 if (__team_find_option(team, option->name)) {
107 err = -EEXIST;
108 goto rollback;
109 }
110 dst_opt = kmalloc(sizeof(*option), GFP_KERNEL);
111 if (!dst_opt) {
112 err = -ENOMEM;
113 goto rollback;
114 }
115 memcpy(dst_opt, option, sizeof(*option));
116 dst_opts[i] = dst_opt;
117 }
118
119 for (i = 0; i < option_count; i++)
120 list_add_tail(&dst_opts[i]->list, &team->option_list);
121
122 return 0;
123
124rollback:
125 for (i = 0; i < option_count; i++)
126 kfree(dst_opts[i]);
127
128 return err;
3d249d4c 129}
358b8382 130
3d249d4c
JP		 131EXPORT_SYMBOL(team_options_register);
132
133static void __team_options_change_check(struct team *team,
134 struct team_option *changed_option);
135
136static void __team_options_unregister(struct team *team,
358b8382 137 const struct team_option *option,
3d249d4c
JP		 138 size_t option_count)
139{
140 int i;
141
358b8382
JP		 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 list_del(&del_opt->list);
148 kfree(del_opt);
149 }
150 }
3d249d4c
JP		 151}
152
358b8382
JP		 153void team_options_unregister(struct team *team,
154 const struct team_option *option,
3d249d4c
JP		 155 size_t option_count)
156{
157 __team_options_unregister(team, option, option_count);
158 __team_options_change_check(team, NULL);
159}
160EXPORT_SYMBOL(team_options_unregister);
161
162static int team_option_get(struct team *team, struct team_option *option,
163 void *arg)
164{
165 return option->getter(team, arg);
166}
167
168static int team_option_set(struct team *team, struct team_option *option,
169 void *arg)
170{
171 int err;
172
173 err = option->setter(team, arg);
174 if (err)
175 return err;
176
177 __team_options_change_check(team, option);
178 return err;
179}
180
181/****************
182 * Mode handling
183 ****************/
184
185static LIST_HEAD(mode_list);
186static DEFINE_SPINLOCK(mode_list_lock);
187
188static struct team_mode *__find_mode(const char *kind)
189{
190 struct team_mode *mode;
191
192 list_for_each_entry(mode, &mode_list, list) {
193 if (strcmp(mode->kind, kind) == 0)
194 return mode;
195 }
196 return NULL;
197}
198
199static bool is_good_mode_name(const char *name)
200{
201 while (*name != '\0') {
202 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
203 return false;
204 name++;
205 }
206 return true;
207}
208
209int team_mode_register(struct team_mode *mode)
210{
211 int err = 0;
212
213 if (!is_good_mode_name(mode->kind) ||
214 mode->priv_size > TEAM_MODE_PRIV_SIZE)
215 return -EINVAL;
216 spin_lock(&mode_list_lock);
217 if (__find_mode(mode->kind)) {
218 err = -EEXIST;
219 goto unlock;
220 }
221 list_add_tail(&mode->list, &mode_list);
222unlock:
223 spin_unlock(&mode_list_lock);
224 return err;
225}
226EXPORT_SYMBOL(team_mode_register);
227
228int team_mode_unregister(struct team_mode *mode)
229{
230 spin_lock(&mode_list_lock);
231 list_del_init(&mode->list);
232 spin_unlock(&mode_list_lock);
233 return 0;
234}
235EXPORT_SYMBOL(team_mode_unregister);
236
237static struct team_mode *team_mode_get(const char *kind)
238{
239 struct team_mode *mode;
240
241 spin_lock(&mode_list_lock);
242 mode = __find_mode(kind);
243 if (!mode) {
244 spin_unlock(&mode_list_lock);
245 request_module("team-mode-%s", kind);
246 spin_lock(&mode_list_lock);
247 mode = __find_mode(kind);
248 }
249 if (mode)
250 if (!try_module_get(mode->owner))
251 mode = NULL;
252
253 spin_unlock(&mode_list_lock);
254 return mode;
255}
256
257static void team_mode_put(const struct team_mode *mode)
258{
259 module_put(mode->owner);
260}
261
262static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
263{
264 dev_kfree_skb_any(skb);
265 return false;
266}
267
268rx_handler_result_t team_dummy_receive(struct team *team,
269 struct team_port *port,
270 struct sk_buff *skb)
271{
272 return RX_HANDLER_ANOTHER;
273}
274
275static void team_adjust_ops(struct team *team)
276{
277 /*
278 * To avoid checks in rx/tx skb paths, ensure here that non-null and
279 * correct ops are always set.
280 */
281
282 if (list_empty(&team->port_list) ||
283 !team->mode || !team->mode->ops->transmit)
284 team->ops.transmit = team_dummy_transmit;
285 else
286 team->ops.transmit = team->mode->ops->transmit;
287
288 if (list_empty(&team->port_list) ||
289 !team->mode || !team->mode->ops->receive)
290 team->ops.receive = team_dummy_receive;
291 else
292 team->ops.receive = team->mode->ops->receive;
293}
294
295/*
296 * We can benefit from the fact that it's ensured no port is present
297 * at the time of mode change. Therefore no packets are in fly so there's no
298 * need to set mode operations in any special way.
299 */
300static int __team_change_mode(struct team *team,
301 const struct team_mode *new_mode)
302{
303 /* Check if mode was previously set and do cleanup if so */
304 if (team->mode) {
305 void (*exit_op)(struct team *team) = team->ops.exit;
306
307 /* Clear ops area so no callback is called any longer */
308 memset(&team->ops, 0, sizeof(struct team_mode_ops));
309 team_adjust_ops(team);
310
311 if (exit_op)
312 exit_op(team);
313 team_mode_put(team->mode);
314 team->mode = NULL;
315 /* zero private data area */
316 memset(&team->mode_priv, 0,
317 sizeof(struct team) - offsetof(struct team, mode_priv));
318 }
319
320 if (!new_mode)
321 return 0;
322
323 if (new_mode->ops->init) {
324 int err;
325
326 err = new_mode->ops->init(team);
327 if (err)
328 return err;
329 }
330
331 team->mode = new_mode;
332 memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
333 team_adjust_ops(team);
334
335 return 0;
336}
337
338static int team_change_mode(struct team *team, const char *kind)
339{
340 struct team_mode *new_mode;
341 struct net_device *dev = team->dev;
342 int err;
343
344 if (!list_empty(&team->port_list)) {
345 netdev_err(dev, "No ports can be present during mode change\n");
346 return -EBUSY;
347 }
348
349 if (team->mode && strcmp(team->mode->kind, kind) == 0) {
350 netdev_err(dev, "Unable to change to the same mode the team is in\n");
351 return -EINVAL;
352 }
353
354 new_mode = team_mode_get(kind);
355 if (!new_mode) {
356 netdev_err(dev, "Mode \"%s\" not found\n", kind);
357 return -EINVAL;
358 }
359
360 err = __team_change_mode(team, new_mode);
361 if (err) {
362 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
363 team_mode_put(new_mode);
364 return err;
365 }
366
367 netdev_info(dev, "Mode changed to \"%s\"\n", kind);
368 return 0;
369}
370
371
372/************************
373 * Rx path frame handler
374 ************************/
375
376/* note: already called with rcu_read_lock */
377static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
378{
379 struct sk_buff *skb = *pskb;
380 struct team_port *port;
381 struct team *team;
382 rx_handler_result_t res;
383
384 skb = skb_share_check(skb, GFP_ATOMIC);
385 if (!skb)
386 return RX_HANDLER_CONSUMED;
387
388 *pskb = skb;
389
390 port = team_port_get_rcu(skb->dev);
391 team = port->team;
392
393 res = team->ops.receive(team, port, skb);
394 if (res == RX_HANDLER_ANOTHER) {
395 struct team_pcpu_stats *pcpu_stats;
396
397 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
398 u64_stats_update_begin(&pcpu_stats->syncp);
399 pcpu_stats->rx_packets++;
400 pcpu_stats->rx_bytes += skb->len;
401 if (skb->pkt_type == PACKET_MULTICAST)
402 pcpu_stats->rx_multicast++;
403 u64_stats_update_end(&pcpu_stats->syncp);
404
405 skb->dev = team->dev;
406 } else {
407 this_cpu_inc(team->pcpu_stats->rx_dropped);
408 }
409
410 return res;
411}
412
413
414/****************
415 * Port handling
416 ****************/
417
418static bool team_port_find(const struct team *team,
419 const struct team_port *port)
420{
421 struct team_port *cur;
422
423 list_for_each_entry(cur, &team->port_list, list)
424 if (cur == port)
425 return true;
426 return false;
427}
428
429/*
430 * Add/delete port to the team port list. Write guarded by rtnl_lock.
431 * Takes care of correct port->index setup (might be racy).
432 */
433static void team_port_list_add_port(struct team *team,
434 struct team_port *port)
435{
436 port->index = team->port_count++;
437 hlist_add_head_rcu(&port->hlist,
438 team_port_index_hash(team, port->index));
439 list_add_tail_rcu(&port->list, &team->port_list);
440}
441
442static void __reconstruct_port_hlist(struct team *team, int rm_index)
443{
444 int i;
445 struct team_port *port;
446
447 for (i = rm_index + 1; i < team->port_count; i++) {
448 port = team_get_port_by_index(team, i);
449 hlist_del_rcu(&port->hlist);
450 port->index--;
451 hlist_add_head_rcu(&port->hlist,
452 team_port_index_hash(team, port->index));
453 }
454}
455
456static void team_port_list_del_port(struct team *team,
457 struct team_port *port)
458{
459 int rm_index = port->index;
460
461 hlist_del_rcu(&port->hlist);
462 list_del_rcu(&port->list);
463 __reconstruct_port_hlist(team, rm_index);
464 team->port_count--;
465}
466
467#define TEAM_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \
468 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
469 NETIF_F_HIGHDMA | NETIF_F_LRO)
470
471static void __team_compute_features(struct team *team)
472{
473 struct team_port *port;
474 u32 vlan_features = TEAM_VLAN_FEATURES;
475 unsigned short max_hard_header_len = ETH_HLEN;
476
477 list_for_each_entry(port, &team->port_list, list) {
478 vlan_features = netdev_increment_features(vlan_features,
479 port->dev->vlan_features,
480 TEAM_VLAN_FEATURES);
481
482 if (port->dev->hard_header_len > max_hard_header_len)
483 max_hard_header_len = port->dev->hard_header_len;
484 }
485
486 team->dev->vlan_features = vlan_features;
487 team->dev->hard_header_len = max_hard_header_len;
488
489 netdev_change_features(team->dev);
490}
491
492static void team_compute_features(struct team *team)
493{
61dc3461 494 mutex_lock(&team->lock);
3d249d4c 495 __team_compute_features(team);
61dc3461 496 mutex_unlock(&team->lock);
3d249d4c
JP		 497}
498
499static int team_port_enter(struct team *team, struct team_port *port)
500{
501 int err = 0;
502
503 dev_hold(team->dev);
504 port->dev->priv_flags |= IFF_TEAM_PORT;
505 if (team->ops.port_enter) {
506 err = team->ops.port_enter(team, port);
507 if (err) {
508 netdev_err(team->dev, "Device %s failed to enter team mode\n",
509 port->dev->name);
510 goto err_port_enter;
511 }
512 }
513
514 return 0;
515
516err_port_enter:
517 port->dev->priv_flags &= ~IFF_TEAM_PORT;
518 dev_put(team->dev);
519
520 return err;
521}
522
523static void team_port_leave(struct team *team, struct team_port *port)
524{
525 if (team->ops.port_leave)
526 team->ops.port_leave(team, port);
527 port->dev->priv_flags &= ~IFF_TEAM_PORT;
528 dev_put(team->dev);
529}
530
531static void __team_port_change_check(struct team_port *port, bool linkup);
532
533static int team_port_add(struct team *team, struct net_device *port_dev)
534{
535 struct net_device *dev = team->dev;
536 struct team_port *port;
537 char *portname = port_dev->name;
538 int err;
539
540 if (port_dev->flags & IFF_LOOPBACK ||
541 port_dev->type != ARPHRD_ETHER) {
542 netdev_err(dev, "Device %s is of an unsupported type\n",
543 portname);
544 return -EINVAL;
545 }
546
547 if (team_port_exists(port_dev)) {
548 netdev_err(dev, "Device %s is already a port "
549 "of a team device\n", portname);
550 return -EBUSY;
551 }
552
553 if (port_dev->flags & IFF_UP) {
554 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
555 portname);
556 return -EBUSY;
557 }
558
559 port = kzalloc(sizeof(struct team_port), GFP_KERNEL);
560 if (!port)
561 return -ENOMEM;
562
563 port->dev = port_dev;
564 port->team = team;
565
566 port->orig.mtu = port_dev->mtu;
567 err = dev_set_mtu(port_dev, dev->mtu);
568 if (err) {
569 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
570 goto err_set_mtu;
571 }
572
573 memcpy(port->orig.dev_addr, port_dev->dev_addr, ETH_ALEN);
574
575 err = team_port_enter(team, port);
576 if (err) {
577 netdev_err(dev, "Device %s failed to enter team mode\n",
578 portname);
579 goto err_port_enter;
580 }
581
582 err = dev_open(port_dev);
583 if (err) {
584 netdev_dbg(dev, "Device %s opening failed\n",
585 portname);
586 goto err_dev_open;
587 }
588
589 err = netdev_set_master(port_dev, dev);
590 if (err) {
591 netdev_err(dev, "Device %s failed to set master\n", portname);
592 goto err_set_master;
593 }
594
595 err = netdev_rx_handler_register(port_dev, team_handle_frame,
596 port);
597 if (err) {
598 netdev_err(dev, "Device %s failed to register rx_handler\n",
599 portname);
600 goto err_handler_register;
601 }
602
603 team_port_list_add_port(team, port);
604 team_adjust_ops(team);
605 __team_compute_features(team);
606 __team_port_change_check(port, !!netif_carrier_ok(port_dev));
607
608 netdev_info(dev, "Port device %s added\n", portname);
609
610 return 0;
611
612err_handler_register:
613 netdev_set_master(port_dev, NULL);
614
615err_set_master:
616 dev_close(port_dev);
617
618err_dev_open:
619 team_port_leave(team, port);
620 team_port_set_orig_mac(port);
621
622err_port_enter:
623 dev_set_mtu(port_dev, port->orig.mtu);
624
625err_set_mtu:
626 kfree(port);
627
628 return err;
629}
630
631static int team_port_del(struct team *team, struct net_device *port_dev)
632{
633 struct net_device *dev = team->dev;
634 struct team_port *port;
635 char *portname = port_dev->name;
636
637 port = team_port_get_rtnl(port_dev);
638 if (!port || !team_port_find(team, port)) {
639 netdev_err(dev, "Device %s does not act as a port of this team\n",
640 portname);
641 return -ENOENT;
642 }
643
644 __team_port_change_check(port, false);
645 team_port_list_del_port(team, port);
646 team_adjust_ops(team);
647 netdev_rx_handler_unregister(port_dev);
648 netdev_set_master(port_dev, NULL);
649 dev_close(port_dev);
650 team_port_leave(team, port);
651 team_port_set_orig_mac(port);
652 dev_set_mtu(port_dev, port->orig.mtu);
653 synchronize_rcu();
654 kfree(port);
655 netdev_info(dev, "Port device %s removed\n", portname);
656 __team_compute_features(team);
657
658 return 0;
659}
660
661
662/*****************
663 * Net device ops
664 *****************/
665
666static const char team_no_mode_kind[] = "*NOMODE*";
667
668static int team_mode_option_get(struct team *team, void *arg)
669{
670 const char **str = arg;
671
672 *str = team->mode ? team->mode->kind : team_no_mode_kind;
673 return 0;
674}
675
676static int team_mode_option_set(struct team *team, void *arg)
677{
678 const char **str = arg;
679
680 return team_change_mode(team, *str);
681}
682
358b8382 683static const struct team_option team_options[] = {
3d249d4c
JP		 684 {
685 .name = "mode",
686 .type = TEAM_OPTION_TYPE_STRING,
687 .getter = team_mode_option_get,
688 .setter = team_mode_option_set,
689 },
690};
691
692static int team_init(struct net_device *dev)
693{
694 struct team *team = netdev_priv(dev);
695 int i;
358b8382 696 int err;
3d249d4c
JP		 697
698 team->dev = dev;
61dc3461 699 mutex_init(&team->lock);
3d249d4c
JP		 700
701 team->pcpu_stats = alloc_percpu(struct team_pcpu_stats);
702 if (!team->pcpu_stats)
703 return -ENOMEM;
704
705 for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
706 INIT_HLIST_HEAD(&team->port_hlist[i]);
707 INIT_LIST_HEAD(&team->port_list);
708
709 team_adjust_ops(team);
710
711 INIT_LIST_HEAD(&team->option_list);
358b8382
JP		 712 err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
713 if (err)
714 goto err_options_register;
3d249d4c
JP		 715 netif_carrier_off(dev);
716
717 return 0;
358b8382
JP		 718
719err_options_register:
720 free_percpu(team->pcpu_stats);
721
722 return err;
3d249d4c
JP		 723}
724
725static void team_uninit(struct net_device *dev)
726{
727 struct team *team = netdev_priv(dev);
728 struct team_port *port;
729 struct team_port *tmp;
730
61dc3461 731 mutex_lock(&team->lock);
3d249d4c
JP		 732 list_for_each_entry_safe(port, tmp, &team->port_list, list)
733 team_port_del(team, port->dev);
734
735 __team_change_mode(team, NULL); /* cleanup */
736 __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
61dc3461 737 mutex_unlock(&team->lock);
3d249d4c
JP		 738}
739
740static void team_destructor(struct net_device *dev)
741{
742 struct team *team = netdev_priv(dev);
743
744 free_percpu(team->pcpu_stats);
745 free_netdev(dev);
746}
747
748static int team_open(struct net_device *dev)
749{
750 netif_carrier_on(dev);
751 return 0;
752}
753
754static int team_close(struct net_device *dev)
755{
756 netif_carrier_off(dev);
757 return 0;
758}
759
760/*
761 * note: already called with rcu_read_lock
762 */
763static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
764{
765 struct team *team = netdev_priv(dev);
766 bool tx_success = false;
767 unsigned int len = skb->len;
768
769 tx_success = team->ops.transmit(team, skb);
770 if (tx_success) {
771 struct team_pcpu_stats *pcpu_stats;
772
773 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
774 u64_stats_update_begin(&pcpu_stats->syncp);
775 pcpu_stats->tx_packets++;
776 pcpu_stats->tx_bytes += len;
777 u64_stats_update_end(&pcpu_stats->syncp);
778 } else {
779 this_cpu_inc(team->pcpu_stats->tx_dropped);
780 }
781
782 return NETDEV_TX_OK;
783}
784
785static void team_change_rx_flags(struct net_device *dev, int change)
786{
787 struct team *team = netdev_priv(dev);
788 struct team_port *port;
789 int inc;
790
791 rcu_read_lock();
792 list_for_each_entry_rcu(port, &team->port_list, list) {
793 if (change & IFF_PROMISC) {
794 inc = dev->flags & IFF_PROMISC ? 1 : -1;
795 dev_set_promiscuity(port->dev, inc);
796 }
797 if (change & IFF_ALLMULTI) {
798 inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
799 dev_set_allmulti(port->dev, inc);
800 }
801 }
802 rcu_read_unlock();
803}
804
805static void team_set_rx_mode(struct net_device *dev)
806{
807 struct team *team = netdev_priv(dev);
808 struct team_port *port;
809
810 rcu_read_lock();
811 list_for_each_entry_rcu(port, &team->port_list, list) {
812 dev_uc_sync(port->dev, dev);
813 dev_mc_sync(port->dev, dev);
814 }
815 rcu_read_unlock();
816}
817
818static int team_set_mac_address(struct net_device *dev, void *p)
819{
820 struct team *team = netdev_priv(dev);
821 struct team_port *port;
822 struct sockaddr *addr = p;
823
824 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
825 rcu_read_lock();
826 list_for_each_entry_rcu(port, &team->port_list, list)
827 if (team->ops.port_change_mac)
828 team->ops.port_change_mac(team, port);
829 rcu_read_unlock();
830 return 0;
831}
832
833static int team_change_mtu(struct net_device *dev, int new_mtu)
834{
835 struct team *team = netdev_priv(dev);
836 struct team_port *port;
837 int err;
838
839 /*
840 * Alhough this is reader, it's guarded by team lock. It's not possible
841 * to traverse list in reverse under rcu_read_lock
842 */
61dc3461 843 mutex_lock(&team->lock);
3d249d4c
JP		 844 list_for_each_entry(port, &team->port_list, list) {
845 err = dev_set_mtu(port->dev, new_mtu);
846 if (err) {
847 netdev_err(dev, "Device %s failed to change mtu",
848 port->dev->name);
849 goto unwind;
850 }
851 }
61dc3461 852 mutex_unlock(&team->lock);
3d249d4c
JP		 853
854 dev->mtu = new_mtu;
855
856 return 0;
857
858unwind:
859 list_for_each_entry_continue_reverse(port, &team->port_list, list)
860 dev_set_mtu(port->dev, dev->mtu);
61dc3461 861 mutex_unlock(&team->lock);
3d249d4c
JP		 862
863 return err;
864}
865
866static struct rtnl_link_stats64 *
867team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
868{
869 struct team *team = netdev_priv(dev);
870 struct team_pcpu_stats *p;
871 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
872 u32 rx_dropped = 0, tx_dropped = 0;
873 unsigned int start;
874 int i;
875
876 for_each_possible_cpu(i) {
877 p = per_cpu_ptr(team->pcpu_stats, i);
878 do {
879 start = u64_stats_fetch_begin_bh(&p->syncp);
880 rx_packets = p->rx_packets;
881 rx_bytes = p->rx_bytes;
882 rx_multicast = p->rx_multicast;
883 tx_packets = p->tx_packets;
884 tx_bytes = p->tx_bytes;
885 } while (u64_stats_fetch_retry_bh(&p->syncp, start));
886
887 stats->rx_packets += rx_packets;
888 stats->rx_bytes += rx_bytes;
889 stats->multicast += rx_multicast;
890 stats->tx_packets += tx_packets;
891 stats->tx_bytes += tx_bytes;
892 /*
893 * rx_dropped & tx_dropped are u32, updated
894 * without syncp protection.
895 */
896 rx_dropped += p->rx_dropped;
897 tx_dropped += p->tx_dropped;
898 }
899 stats->rx_dropped = rx_dropped;
900 stats->tx_dropped = tx_dropped;
901 return stats;
902}
903
904static void team_vlan_rx_add_vid(struct net_device *dev, uint16_t vid)
905{
906 struct team *team = netdev_priv(dev);
907 struct team_port *port;
908
909 rcu_read_lock();
910 list_for_each_entry_rcu(port, &team->port_list, list) {
911 const struct net_device_ops *ops = port->dev->netdev_ops;
912
913 if (ops->ndo_vlan_rx_add_vid)
914 ops->ndo_vlan_rx_add_vid(port->dev, vid);
915 }
916 rcu_read_unlock();
917}
918
919static void team_vlan_rx_kill_vid(struct net_device *dev, uint16_t vid)
920{
921 struct team *team = netdev_priv(dev);
922 struct team_port *port;
923
924 rcu_read_lock();
925 list_for_each_entry_rcu(port, &team->port_list, list) {
926 const struct net_device_ops *ops = port->dev->netdev_ops;
927
928 if (ops->ndo_vlan_rx_kill_vid)
929 ops->ndo_vlan_rx_kill_vid(port->dev, vid);
930 }
931 rcu_read_unlock();
932}
933
934static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
935{
936 struct team *team = netdev_priv(dev);
937 int err;
938
61dc3461 939 mutex_lock(&team->lock);
3d249d4c 940 err = team_port_add(team, port_dev);
61dc3461 941 mutex_unlock(&team->lock);
3d249d4c
JP		 942 return err;
943}
944
945static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
946{
947 struct team *team = netdev_priv(dev);
948 int err;
949
61dc3461 950 mutex_lock(&team->lock);
3d249d4c 951 err = team_port_del(team, port_dev);
61dc3461 952 mutex_unlock(&team->lock);
3d249d4c
JP		 953 return err;
954}
955
956static const struct net_device_ops team_netdev_ops = {
957 .ndo_init = team_init,
958 .ndo_uninit = team_uninit,
959 .ndo_open = team_open,
960 .ndo_stop = team_close,
961 .ndo_start_xmit = team_xmit,
962 .ndo_change_rx_flags = team_change_rx_flags,
963 .ndo_set_rx_mode = team_set_rx_mode,
964 .ndo_set_mac_address = team_set_mac_address,
965 .ndo_change_mtu = team_change_mtu,
966 .ndo_get_stats64 = team_get_stats64,
967 .ndo_vlan_rx_add_vid = team_vlan_rx_add_vid,
968 .ndo_vlan_rx_kill_vid = team_vlan_rx_kill_vid,
969 .ndo_add_slave = team_add_slave,
970 .ndo_del_slave = team_del_slave,
971};
972
973
974/***********************
975 * rt netlink interface
976 ***********************/
977
978static void team_setup(struct net_device *dev)
979{
980 ether_setup(dev);
981
982 dev->netdev_ops = &team_netdev_ops;
983 dev->destructor = team_destructor;
984 dev->tx_queue_len = 0;
985 dev->flags |= IFF_MULTICAST;
986 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
987
988 /*
989 * Indicate we support unicast address filtering. That way core won't
990 * bring us to promisc mode in case a unicast addr is added.
991 * Let this up to underlay drivers.
992 */
993 dev->priv_flags |= IFF_UNICAST_FLT;
994
995 dev->features |= NETIF_F_LLTX;
996 dev->features |= NETIF_F_GRO;
997 dev->hw_features = NETIF_F_HW_VLAN_TX |
998 NETIF_F_HW_VLAN_RX |
999 NETIF_F_HW_VLAN_FILTER;
1000
1001 dev->features |= dev->hw_features;
1002}
1003
1004static int team_newlink(struct net *src_net, struct net_device *dev,
1005 struct nlattr *tb[], struct nlattr *data[])
1006{
1007 int err;
1008
1009 if (tb[IFLA_ADDRESS] == NULL)
1010 random_ether_addr(dev->dev_addr);
1011
1012 err = register_netdevice(dev);
1013 if (err)
1014 return err;
1015
1016 return 0;
1017}
1018
1019static int team_validate(struct nlattr *tb[], struct nlattr *data[])
1020{
1021 if (tb[IFLA_ADDRESS]) {
1022 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
1023 return -EINVAL;
1024 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
1025 return -EADDRNOTAVAIL;
1026 }
1027 return 0;
1028}
1029
1030static struct rtnl_link_ops team_link_ops __read_mostly = {
1031 .kind = DRV_NAME,
1032 .priv_size = sizeof(struct team),
1033 .setup = team_setup,
1034 .newlink = team_newlink,
1035 .validate = team_validate,
1036};
1037
1038
1039/***********************************
1040 * Generic netlink custom interface
1041 ***********************************/
1042
1043static struct genl_family team_nl_family = {
1044 .id = GENL_ID_GENERATE,
1045 .name = TEAM_GENL_NAME,
1046 .version = TEAM_GENL_VERSION,
1047 .maxattr = TEAM_ATTR_MAX,
1048 .netnsok = true,
1049};
1050
1051static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
1052 [TEAM_ATTR_UNSPEC] = { .type = NLA_UNSPEC, },
1053 [TEAM_ATTR_TEAM_IFINDEX] = { .type = NLA_U32 },
1054 [TEAM_ATTR_LIST_OPTION] = { .type = NLA_NESTED },
1055 [TEAM_ATTR_LIST_PORT] = { .type = NLA_NESTED },
1056};
1057
1058static const struct nla_policy
1059team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
1060 [TEAM_ATTR_OPTION_UNSPEC] = { .type = NLA_UNSPEC, },
1061 [TEAM_ATTR_OPTION_NAME] = {
1062 .type = NLA_STRING,
1063 .len = TEAM_STRING_MAX_LEN,
1064 },
1065 [TEAM_ATTR_OPTION_CHANGED] = { .type = NLA_FLAG },
1066 [TEAM_ATTR_OPTION_TYPE] = { .type = NLA_U8 },
1067 [TEAM_ATTR_OPTION_DATA] = {
1068 .type = NLA_BINARY,
1069 .len = TEAM_STRING_MAX_LEN,
1070 },
1071};
1072
1073static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
1074{
1075 struct sk_buff *msg;
1076 void *hdr;
1077 int err;
1078
1079 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1080 if (!msg)
1081 return -ENOMEM;
1082
1083 hdr = genlmsg_put(msg, info->snd_pid, info->snd_seq,
1084 &team_nl_family, 0, TEAM_CMD_NOOP);
1085 if (IS_ERR(hdr)) {
1086 err = PTR_ERR(hdr);
1087 goto err_msg_put;
1088 }
1089
1090 genlmsg_end(msg, hdr);
1091
1092 return genlmsg_unicast(genl_info_net(info), msg, info->snd_pid);
1093
1094err_msg_put:
1095 nlmsg_free(msg);
1096
1097 return err;
1098}
1099
1100/*
1101 * Netlink cmd functions should be locked by following two functions.
8c0713a5 1102 * Since dev gets held here, that ensures dev won't disappear in between.
3d249d4c
JP		 1103 */
1104static struct team *team_nl_team_get(struct genl_info *info)
1105{
1106 struct net *net = genl_info_net(info);
1107 int ifindex;
1108 struct net_device *dev;
1109 struct team *team;
1110
1111 if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
1112 return NULL;
1113
1114 ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
8c0713a5 1115 dev = dev_get_by_index(net, ifindex);
3d249d4c 1116 if (!dev || dev->netdev_ops != &team_netdev_ops) {
8c0713a5
JP		 1117 if (dev)
1118 dev_put(dev);
3d249d4c
JP		 1119 return NULL;
1120 }
1121
1122 team = netdev_priv(dev);
61dc3461 1123 mutex_lock(&team->lock);
3d249d4c
JP		 1124 return team;
1125}
1126
1127static void team_nl_team_put(struct team *team)
1128{
61dc3461 1129 mutex_unlock(&team->lock);
8c0713a5 1130 dev_put(team->dev);
3d249d4c
JP		 1131}
1132
1133static int team_nl_send_generic(struct genl_info *info, struct team *team,
1134 int (*fill_func)(struct sk_buff *skb,
1135 struct genl_info *info,
1136 int flags, struct team *team))
1137{
1138 struct sk_buff *skb;
1139 int err;
1140
1141 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1142 if (!skb)
1143 return -ENOMEM;
1144
1145 err = fill_func(skb, info, NLM_F_ACK, team);
1146 if (err < 0)
1147 goto err_fill;
1148
1149 err = genlmsg_unicast(genl_info_net(info), skb, info->snd_pid);
1150 return err;
1151
1152err_fill:
1153 nlmsg_free(skb);
1154 return err;
1155}
1156
1157static int team_nl_fill_options_get_changed(struct sk_buff *skb,
1158 u32 pid, u32 seq, int flags,
1159 struct team *team,
1160 struct team_option *changed_option)
1161{
1162 struct nlattr *option_list;
1163 void *hdr;
1164 struct team_option *option;
1165
1166 hdr = genlmsg_put(skb, pid, seq, &team_nl_family, flags,
1167 TEAM_CMD_OPTIONS_GET);
1168 if (IS_ERR(hdr))
1169 return PTR_ERR(hdr);
1170
1171 NLA_PUT_U32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex);
1172 option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
1173 if (!option_list)
1174 return -EMSGSIZE;
1175
1176 list_for_each_entry(option, &team->option_list, list) {
1177 struct nlattr *option_item;
1178 long arg;
1179
1180 option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
1181 if (!option_item)
1182 goto nla_put_failure;
1183 NLA_PUT_STRING(skb, TEAM_ATTR_OPTION_NAME, option->name);
1184 if (option == changed_option)
1185 NLA_PUT_FLAG(skb, TEAM_ATTR_OPTION_CHANGED);
1186 switch (option->type) {
1187 case TEAM_OPTION_TYPE_U32:
1188 NLA_PUT_U8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32);
1189 team_option_get(team, option, &arg);
1190 NLA_PUT_U32(skb, TEAM_ATTR_OPTION_DATA, arg);
1191 break;
1192 case TEAM_OPTION_TYPE_STRING:
1193 NLA_PUT_U8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING);
1194 team_option_get(team, option, &arg);
1195 NLA_PUT_STRING(skb, TEAM_ATTR_OPTION_DATA,
1196 (char *) arg);
1197 break;
1198 default:
1199 BUG();
1200 }
1201 nla_nest_end(skb, option_item);
1202 }
1203
1204 nla_nest_end(skb, option_list);
1205 return genlmsg_end(skb, hdr);
1206
1207nla_put_failure:
1208 genlmsg_cancel(skb, hdr);
1209 return -EMSGSIZE;
1210}
1211
1212static int team_nl_fill_options_get(struct sk_buff *skb,
1213 struct genl_info *info, int flags,
1214 struct team *team)
1215{
1216 return team_nl_fill_options_get_changed(skb, info->snd_pid,
1217 info->snd_seq, NLM_F_ACK,
1218 team, NULL);
1219}
1220
1221static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
1222{
1223 struct team *team;
1224 int err;
1225
1226 team = team_nl_team_get(info);
1227 if (!team)
1228 return -EINVAL;
1229
1230 err = team_nl_send_generic(info, team, team_nl_fill_options_get);
1231
1232 team_nl_team_put(team);
1233
1234 return err;
1235}
1236
1237static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
1238{
1239 struct team *team;
1240 int err = 0;
1241 int i;
1242 struct nlattr *nl_option;
1243
1244 team = team_nl_team_get(info);
1245 if (!team)
1246 return -EINVAL;
1247
1248 err = -EINVAL;
1249 if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
1250 err = -EINVAL;
1251 goto team_put;
1252 }
1253
1254 nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
1255 struct nlattr *mode_attrs[TEAM_ATTR_OPTION_MAX + 1];
1256 enum team_option_type opt_type;
1257 struct team_option *option;
1258 char *opt_name;
1259 bool opt_found = false;
1260
1261 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
1262 err = -EINVAL;
1263 goto team_put;
1264 }
1265 err = nla_parse_nested(mode_attrs, TEAM_ATTR_OPTION_MAX,
1266 nl_option, team_nl_option_policy);
1267 if (err)
1268 goto team_put;
1269 if (!mode_attrs[TEAM_ATTR_OPTION_NAME] ||
1270 !mode_attrs[TEAM_ATTR_OPTION_TYPE] ||
1271 !mode_attrs[TEAM_ATTR_OPTION_DATA]) {
1272 err = -EINVAL;
1273 goto team_put;
1274 }
1275 switch (nla_get_u8(mode_attrs[TEAM_ATTR_OPTION_TYPE])) {
1276 case NLA_U32:
1277 opt_type = TEAM_OPTION_TYPE_U32;
1278 break;
1279 case NLA_STRING:
1280 opt_type = TEAM_OPTION_TYPE_STRING;
1281 break;
1282 default:
1283 goto team_put;
1284 }
1285
1286 opt_name = nla_data(mode_attrs[TEAM_ATTR_OPTION_NAME]);
1287 list_for_each_entry(option, &team->option_list, list) {
1288 long arg;
1289 struct nlattr *opt_data_attr;
1290
1291 if (option->type != opt_type ||
1292 strcmp(option->name, opt_name))
1293 continue;
1294 opt_found = true;
1295 opt_data_attr = mode_attrs[TEAM_ATTR_OPTION_DATA];
1296 switch (opt_type) {
1297 case TEAM_OPTION_TYPE_U32:
1298 arg = nla_get_u32(opt_data_attr);
1299 break;
1300 case TEAM_OPTION_TYPE_STRING:
1301 arg = (long) nla_data(opt_data_attr);
1302 break;
1303 default:
1304 BUG();
1305 }
1306 err = team_option_set(team, option, &arg);
1307 if (err)
1308 goto team_put;
1309 }
1310 if (!opt_found) {
1311 err = -ENOENT;
1312 goto team_put;
1313 }
1314 }
1315
1316team_put:
1317 team_nl_team_put(team);
1318
1319 return err;
1320}
1321
1322static int team_nl_fill_port_list_get_changed(struct sk_buff *skb,
1323 u32 pid, u32 seq, int flags,
1324 struct team *team,
1325 struct team_port *changed_port)
1326{
1327 struct nlattr *port_list;
1328 void *hdr;
1329 struct team_port *port;
1330
1331 hdr = genlmsg_put(skb, pid, seq, &team_nl_family, flags,
1332 TEAM_CMD_PORT_LIST_GET);
1333 if (IS_ERR(hdr))
1334 return PTR_ERR(hdr);
1335
1336 NLA_PUT_U32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex);
1337 port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
1338 if (!port_list)
1339 return -EMSGSIZE;
1340
1341 list_for_each_entry(port, &team->port_list, list) {
1342 struct nlattr *port_item;
1343
1344 port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
1345 if (!port_item)
1346 goto nla_put_failure;
1347 NLA_PUT_U32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex);
1348 if (port == changed_port)
1349 NLA_PUT_FLAG(skb, TEAM_ATTR_PORT_CHANGED);
1350 if (port->linkup)
1351 NLA_PUT_FLAG(skb, TEAM_ATTR_PORT_LINKUP);
1352 NLA_PUT_U32(skb, TEAM_ATTR_PORT_SPEED, port->speed);
1353 NLA_PUT_U8(skb, TEAM_ATTR_PORT_DUPLEX, port->duplex);
1354 nla_nest_end(skb, port_item);
1355 }
1356
1357 nla_nest_end(skb, port_list);
1358 return genlmsg_end(skb, hdr);
1359
1360nla_put_failure:
1361 genlmsg_cancel(skb, hdr);
1362 return -EMSGSIZE;
1363}
1364
1365static int team_nl_fill_port_list_get(struct sk_buff *skb,
1366 struct genl_info *info, int flags,
1367 struct team *team)
1368{
1369 return team_nl_fill_port_list_get_changed(skb, info->snd_pid,
1370 info->snd_seq, NLM_F_ACK,
1371 team, NULL);
1372}
1373
1374static int team_nl_cmd_port_list_get(struct sk_buff *skb,
1375 struct genl_info *info)
1376{
1377 struct team *team;
1378 int err;
1379
1380 team = team_nl_team_get(info);
1381 if (!team)
1382 return -EINVAL;
1383
1384 err = team_nl_send_generic(info, team, team_nl_fill_port_list_get);
1385
1386 team_nl_team_put(team);
1387
1388 return err;
1389}
1390
1391static struct genl_ops team_nl_ops[] = {
1392 {
1393 .cmd = TEAM_CMD_NOOP,
1394 .doit = team_nl_cmd_noop,
1395 .policy = team_nl_policy,
1396 },
1397 {
1398 .cmd = TEAM_CMD_OPTIONS_SET,
1399 .doit = team_nl_cmd_options_set,
1400 .policy = team_nl_policy,
1401 .flags = GENL_ADMIN_PERM,
1402 },
1403 {
1404 .cmd = TEAM_CMD_OPTIONS_GET,
1405 .doit = team_nl_cmd_options_get,
1406 .policy = team_nl_policy,
1407 .flags = GENL_ADMIN_PERM,
1408 },
1409 {
1410 .cmd = TEAM_CMD_PORT_LIST_GET,
1411 .doit = team_nl_cmd_port_list_get,
1412 .policy = team_nl_policy,
1413 .flags = GENL_ADMIN_PERM,
1414 },
1415};
1416
1417static struct genl_multicast_group team_change_event_mcgrp = {
1418 .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME,
1419};
1420
1421static int team_nl_send_event_options_get(struct team *team,
1422 struct team_option *changed_option)
1423{
1424 struct sk_buff *skb;
1425 int err;
1426 struct net *net = dev_net(team->dev);
1427
1428 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1429 if (!skb)
1430 return -ENOMEM;
1431
1432 err = team_nl_fill_options_get_changed(skb, 0, 0, 0, team,
1433 changed_option);
1434 if (err < 0)
1435 goto err_fill;
1436
1437 err = genlmsg_multicast_netns(net, skb, 0, team_change_event_mcgrp.id,
1438 GFP_KERNEL);
1439 return err;
1440
1441err_fill:
1442 nlmsg_free(skb);
1443 return err;
1444}
1445
1446static int team_nl_send_event_port_list_get(struct team_port *port)
1447{
1448 struct sk_buff *skb;
1449 int err;
1450 struct net *net = dev_net(port->team->dev);
1451
1452 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1453 if (!skb)
1454 return -ENOMEM;
1455
1456 err = team_nl_fill_port_list_get_changed(skb, 0, 0, 0,
1457 port->team, port);
1458 if (err < 0)
1459 goto err_fill;
1460
1461 err = genlmsg_multicast_netns(net, skb, 0, team_change_event_mcgrp.id,
1462 GFP_KERNEL);
1463 return err;
1464
1465err_fill:
1466 nlmsg_free(skb);
1467 return err;
1468}
1469
1470static int team_nl_init(void)
1471{
1472 int err;
1473
1474 err = genl_register_family_with_ops(&team_nl_family, team_nl_ops,
1475 ARRAY_SIZE(team_nl_ops));
1476 if (err)
1477 return err;
1478
1479 err = genl_register_mc_group(&team_nl_family, &team_change_event_mcgrp);
1480 if (err)
1481 goto err_change_event_grp_reg;
1482
1483 return 0;
1484
1485err_change_event_grp_reg:
1486 genl_unregister_family(&team_nl_family);
1487
1488 return err;
1489}
1490
1491static void team_nl_fini(void)
1492{
1493 genl_unregister_family(&team_nl_family);
1494}
1495
1496
1497/******************
1498 * Change checkers
1499 ******************/
1500
1501static void __team_options_change_check(struct team *team,
1502 struct team_option *changed_option)
1503{
1504 int err;
1505
1506 err = team_nl_send_event_options_get(team, changed_option);
1507 if (err)
1508 netdev_warn(team->dev, "Failed to send options change via netlink\n");
1509}
1510
1511/* rtnl lock is held */
1512static void __team_port_change_check(struct team_port *port, bool linkup)
1513{
1514 int err;
1515
1516 if (port->linkup == linkup)
1517 return;
1518
1519 port->linkup = linkup;
1520 if (linkup) {
1521 struct ethtool_cmd ecmd;
1522
1523 err = __ethtool_get_settings(port->dev, &ecmd);
1524 if (!err) {
1525 port->speed = ethtool_cmd_speed(&ecmd);
1526 port->duplex = ecmd.duplex;
1527 goto send_event;
1528 }
1529 }
1530 port->speed = 0;
1531 port->duplex = 0;
1532
1533send_event:
1534 err = team_nl_send_event_port_list_get(port);
1535 if (err)
1536 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink\n",
1537 port->dev->name);
1538
1539}
1540
1541static void team_port_change_check(struct team_port *port, bool linkup)
1542{
1543 struct team *team = port->team;
1544
61dc3461 1545 mutex_lock(&team->lock);
3d249d4c 1546 __team_port_change_check(port, linkup);
61dc3461 1547 mutex_unlock(&team->lock);
3d249d4c
JP		 1548}
1549
1550/************************************
1551 * Net device notifier event handler
1552 ************************************/
1553
1554static int team_device_event(struct notifier_block *unused,
1555 unsigned long event, void *ptr)
1556{
1557 struct net_device *dev = (struct net_device *) ptr;
1558 struct team_port *port;
1559
1560 port = team_port_get_rtnl(dev);
1561 if (!port)
1562 return NOTIFY_DONE;
1563
1564 switch (event) {
1565 case NETDEV_UP:
1566 if (netif_carrier_ok(dev))
1567 team_port_change_check(port, true);
1568 case NETDEV_DOWN:
1569 team_port_change_check(port, false);
1570 case NETDEV_CHANGE:
1571 if (netif_running(port->dev))
1572 team_port_change_check(port,
1573 !!netif_carrier_ok(port->dev));
1574 break;
1575 case NETDEV_UNREGISTER:
1576 team_del_slave(port->team->dev, dev);
1577 break;
1578 case NETDEV_FEAT_CHANGE:
1579 team_compute_features(port->team);
1580 break;
1581 case NETDEV_CHANGEMTU:
1582 /* Forbid to change mtu of underlaying device */
1583 return NOTIFY_BAD;
1584 case NETDEV_PRE_TYPE_CHANGE:
1585 /* Forbid to change type of underlaying device */
1586 return NOTIFY_BAD;
1587 }
1588 return NOTIFY_DONE;
1589}
1590
1591static struct notifier_block team_notifier_block __read_mostly = {
1592 .notifier_call = team_device_event,
1593};
1594
1595
1596/***********************
1597 * Module init and exit
1598 ***********************/
1599
1600static int __init team_module_init(void)
1601{
1602 int err;
1603
1604 register_netdevice_notifier(&team_notifier_block);
1605
1606 err = rtnl_link_register(&team_link_ops);
1607 if (err)
1608 goto err_rtnl_reg;
1609
1610 err = team_nl_init();
1611 if (err)
1612 goto err_nl_init;
1613
1614 return 0;
1615
1616err_nl_init:
1617 rtnl_link_unregister(&team_link_ops);
1618
1619err_rtnl_reg:
1620 unregister_netdevice_notifier(&team_notifier_block);
1621
1622 return err;
1623}
1624
1625static void __exit team_module_exit(void)
1626{
1627 team_nl_fini();
1628 rtnl_link_unregister(&team_link_ops);
1629 unregister_netdevice_notifier(&team_notifier_block);
1630}
1631
1632module_init(team_module_init);
1633module_exit(team_module_exit);
1634
1635MODULE_LICENSE("GPL v2");
1636MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
1637MODULE_DESCRIPTION("Ethernet team device driver");
1638MODULE_ALIAS_RTNL_LINK(DRV_NAME);
Linux 6.x block layer and io_uring tree(s)