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team: avoid using variable-length array
[linux-2.6-block.git] / drivers / net / team / team.c
CommitLineData
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;
2bba19ff 99 struct team_option **dst_opts;
358b8382 100 int err;
3d249d4c 101
2bba19ff
JP		 102 dst_opts = kzalloc(sizeof(struct team_option *) * option_count,
103 GFP_KERNEL);
104 if (!dst_opts)
105 return -ENOMEM;
358b8382
JP		 106 for (i = 0; i < option_count; i++, option++) {
107 struct team_option *dst_opt;
108
109 if (__team_find_option(team, option->name)) {
110 err = -EEXIST;
111 goto rollback;
112 }
113 dst_opt = kmalloc(sizeof(*option), GFP_KERNEL);
114 if (!dst_opt) {
115 err = -ENOMEM;
116 goto rollback;
117 }
118 memcpy(dst_opt, option, sizeof(*option));
119 dst_opts[i] = dst_opt;
120 }
121
122 for (i = 0; i < option_count; i++)
123 list_add_tail(&dst_opts[i]->list, &team->option_list);
124
2bba19ff 125 kfree(dst_opts);
358b8382
JP		 126 return 0;
127
128rollback:
129 for (i = 0; i < option_count; i++)
130 kfree(dst_opts[i]);
131
2bba19ff 132 kfree(dst_opts);
358b8382 133 return err;
3d249d4c 134}
358b8382 135
3d249d4c
JP		 136EXPORT_SYMBOL(team_options_register);
137
138static void __team_options_change_check(struct team *team,
139 struct team_option *changed_option);
140
141static void __team_options_unregister(struct team *team,
358b8382 142 const struct team_option *option,
3d249d4c
JP		 143 size_t option_count)
144{
145 int i;
146
358b8382
JP		 147 for (i = 0; i < option_count; i++, option++) {
148 struct team_option *del_opt;
149
150 del_opt = __team_find_option(team, option->name);
151 if (del_opt) {
152 list_del(&del_opt->list);
153 kfree(del_opt);
154 }
155 }
3d249d4c
JP		 156}
157
358b8382
JP		 158void team_options_unregister(struct team *team,
159 const struct team_option *option,
3d249d4c
JP		 160 size_t option_count)
161{
162 __team_options_unregister(team, option, option_count);
163 __team_options_change_check(team, NULL);
164}
165EXPORT_SYMBOL(team_options_unregister);
166
167static int team_option_get(struct team *team, struct team_option *option,
168 void *arg)
169{
170 return option->getter(team, arg);
171}
172
173static int team_option_set(struct team *team, struct team_option *option,
174 void *arg)
175{
176 int err;
177
178 err = option->setter(team, arg);
179 if (err)
180 return err;
181
182 __team_options_change_check(team, option);
183 return err;
184}
185
186/****************
187 * Mode handling
188 ****************/
189
190static LIST_HEAD(mode_list);
191static DEFINE_SPINLOCK(mode_list_lock);
192
193static struct team_mode *__find_mode(const char *kind)
194{
195 struct team_mode *mode;
196
197 list_for_each_entry(mode, &mode_list, list) {
198 if (strcmp(mode->kind, kind) == 0)
199 return mode;
200 }
201 return NULL;
202}
203
204static bool is_good_mode_name(const char *name)
205{
206 while (*name != '\0') {
207 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
208 return false;
209 name++;
210 }
211 return true;
212}
213
214int team_mode_register(struct team_mode *mode)
215{
216 int err = 0;
217
218 if (!is_good_mode_name(mode->kind) ||
219 mode->priv_size > TEAM_MODE_PRIV_SIZE)
220 return -EINVAL;
221 spin_lock(&mode_list_lock);
222 if (__find_mode(mode->kind)) {
223 err = -EEXIST;
224 goto unlock;
225 }
226 list_add_tail(&mode->list, &mode_list);
227unlock:
228 spin_unlock(&mode_list_lock);
229 return err;
230}
231EXPORT_SYMBOL(team_mode_register);
232
233int team_mode_unregister(struct team_mode *mode)
234{
235 spin_lock(&mode_list_lock);
236 list_del_init(&mode->list);
237 spin_unlock(&mode_list_lock);
238 return 0;
239}
240EXPORT_SYMBOL(team_mode_unregister);
241
242static struct team_mode *team_mode_get(const char *kind)
243{
244 struct team_mode *mode;
245
246 spin_lock(&mode_list_lock);
247 mode = __find_mode(kind);
248 if (!mode) {
249 spin_unlock(&mode_list_lock);
250 request_module("team-mode-%s", kind);
251 spin_lock(&mode_list_lock);
252 mode = __find_mode(kind);
253 }
254 if (mode)
255 if (!try_module_get(mode->owner))
256 mode = NULL;
257
258 spin_unlock(&mode_list_lock);
259 return mode;
260}
261
262static void team_mode_put(const struct team_mode *mode)
263{
264 module_put(mode->owner);
265}
266
267static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
268{
269 dev_kfree_skb_any(skb);
270 return false;
271}
272
273rx_handler_result_t team_dummy_receive(struct team *team,
274 struct team_port *port,
275 struct sk_buff *skb)
276{
277 return RX_HANDLER_ANOTHER;
278}
279
280static void team_adjust_ops(struct team *team)
281{
282 /*
283 * To avoid checks in rx/tx skb paths, ensure here that non-null and
284 * correct ops are always set.
285 */
286
287 if (list_empty(&team->port_list) ||
288 !team->mode || !team->mode->ops->transmit)
289 team->ops.transmit = team_dummy_transmit;
290 else
291 team->ops.transmit = team->mode->ops->transmit;
292
293 if (list_empty(&team->port_list) ||
294 !team->mode || !team->mode->ops->receive)
295 team->ops.receive = team_dummy_receive;
296 else
297 team->ops.receive = team->mode->ops->receive;
298}
299
300/*
301 * We can benefit from the fact that it's ensured no port is present
302 * at the time of mode change. Therefore no packets are in fly so there's no
303 * need to set mode operations in any special way.
304 */
305static int __team_change_mode(struct team *team,
306 const struct team_mode *new_mode)
307{
308 /* Check if mode was previously set and do cleanup if so */
309 if (team->mode) {
310 void (*exit_op)(struct team *team) = team->ops.exit;
311
312 /* Clear ops area so no callback is called any longer */
313 memset(&team->ops, 0, sizeof(struct team_mode_ops));
314 team_adjust_ops(team);
315
316 if (exit_op)
317 exit_op(team);
318 team_mode_put(team->mode);
319 team->mode = NULL;
320 /* zero private data area */
321 memset(&team->mode_priv, 0,
322 sizeof(struct team) - offsetof(struct team, mode_priv));
323 }
324
325 if (!new_mode)
326 return 0;
327
328 if (new_mode->ops->init) {
329 int err;
330
331 err = new_mode->ops->init(team);
332 if (err)
333 return err;
334 }
335
336 team->mode = new_mode;
337 memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
338 team_adjust_ops(team);
339
340 return 0;
341}
342
343static int team_change_mode(struct team *team, const char *kind)
344{
345 struct team_mode *new_mode;
346 struct net_device *dev = team->dev;
347 int err;
348
349 if (!list_empty(&team->port_list)) {
350 netdev_err(dev, "No ports can be present during mode change\n");
351 return -EBUSY;
352 }
353
354 if (team->mode && strcmp(team->mode->kind, kind) == 0) {
355 netdev_err(dev, "Unable to change to the same mode the team is in\n");
356 return -EINVAL;
357 }
358
359 new_mode = team_mode_get(kind);
360 if (!new_mode) {
361 netdev_err(dev, "Mode \"%s\" not found\n", kind);
362 return -EINVAL;
363 }
364
365 err = __team_change_mode(team, new_mode);
366 if (err) {
367 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
368 team_mode_put(new_mode);
369 return err;
370 }
371
372 netdev_info(dev, "Mode changed to \"%s\"\n", kind);
373 return 0;
374}
375
376
377/************************
378 * Rx path frame handler
379 ************************/
380
381/* note: already called with rcu_read_lock */
382static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
383{
384 struct sk_buff *skb = *pskb;
385 struct team_port *port;
386 struct team *team;
387 rx_handler_result_t res;
388
389 skb = skb_share_check(skb, GFP_ATOMIC);
390 if (!skb)
391 return RX_HANDLER_CONSUMED;
392
393 *pskb = skb;
394
395 port = team_port_get_rcu(skb->dev);
396 team = port->team;
397
398 res = team->ops.receive(team, port, skb);
399 if (res == RX_HANDLER_ANOTHER) {
400 struct team_pcpu_stats *pcpu_stats;
401
402 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
403 u64_stats_update_begin(&pcpu_stats->syncp);
404 pcpu_stats->rx_packets++;
405 pcpu_stats->rx_bytes += skb->len;
406 if (skb->pkt_type == PACKET_MULTICAST)
407 pcpu_stats->rx_multicast++;
408 u64_stats_update_end(&pcpu_stats->syncp);
409
410 skb->dev = team->dev;
411 } else {
412 this_cpu_inc(team->pcpu_stats->rx_dropped);
413 }
414
415 return res;
416}
417
418
419/****************
420 * Port handling
421 ****************/
422
423static bool team_port_find(const struct team *team,
424 const struct team_port *port)
425{
426 struct team_port *cur;
427
428 list_for_each_entry(cur, &team->port_list, list)
429 if (cur == port)
430 return true;
431 return false;
432}
433
434/*
435 * Add/delete port to the team port list. Write guarded by rtnl_lock.
436 * Takes care of correct port->index setup (might be racy).
437 */
438static void team_port_list_add_port(struct team *team,
439 struct team_port *port)
440{
441 port->index = team->port_count++;
442 hlist_add_head_rcu(&port->hlist,
443 team_port_index_hash(team, port->index));
444 list_add_tail_rcu(&port->list, &team->port_list);
445}
446
447static void __reconstruct_port_hlist(struct team *team, int rm_index)
448{
449 int i;
450 struct team_port *port;
451
452 for (i = rm_index + 1; i < team->port_count; i++) {
453 port = team_get_port_by_index(team, i);
454 hlist_del_rcu(&port->hlist);
455 port->index--;
456 hlist_add_head_rcu(&port->hlist,
457 team_port_index_hash(team, port->index));
458 }
459}
460
461static void team_port_list_del_port(struct team *team,
462 struct team_port *port)
463{
464 int rm_index = port->index;
465
466 hlist_del_rcu(&port->hlist);
467 list_del_rcu(&port->list);
468 __reconstruct_port_hlist(team, rm_index);
469 team->port_count--;
470}
471
472#define TEAM_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \
473 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
474 NETIF_F_HIGHDMA | NETIF_F_LRO)
475
476static void __team_compute_features(struct team *team)
477{
478 struct team_port *port;
479 u32 vlan_features = TEAM_VLAN_FEATURES;
480 unsigned short max_hard_header_len = ETH_HLEN;
481
482 list_for_each_entry(port, &team->port_list, list) {
483 vlan_features = netdev_increment_features(vlan_features,
484 port->dev->vlan_features,
485 TEAM_VLAN_FEATURES);
486
487 if (port->dev->hard_header_len > max_hard_header_len)
488 max_hard_header_len = port->dev->hard_header_len;
489 }
490
491 team->dev->vlan_features = vlan_features;
492 team->dev->hard_header_len = max_hard_header_len;
493
494 netdev_change_features(team->dev);
495}
496
497static void team_compute_features(struct team *team)
498{
61dc3461 499 mutex_lock(&team->lock);
3d249d4c 500 __team_compute_features(team);
61dc3461 501 mutex_unlock(&team->lock);
3d249d4c
JP		 502}
503
504static int team_port_enter(struct team *team, struct team_port *port)
505{
506 int err = 0;
507
508 dev_hold(team->dev);
509 port->dev->priv_flags |= IFF_TEAM_PORT;
510 if (team->ops.port_enter) {
511 err = team->ops.port_enter(team, port);
512 if (err) {
513 netdev_err(team->dev, "Device %s failed to enter team mode\n",
514 port->dev->name);
515 goto err_port_enter;
516 }
517 }
518
519 return 0;
520
521err_port_enter:
522 port->dev->priv_flags &= ~IFF_TEAM_PORT;
523 dev_put(team->dev);
524
525 return err;
526}
527
528static void team_port_leave(struct team *team, struct team_port *port)
529{
530 if (team->ops.port_leave)
531 team->ops.port_leave(team, port);
532 port->dev->priv_flags &= ~IFF_TEAM_PORT;
533 dev_put(team->dev);
534}
535
536static void __team_port_change_check(struct team_port *port, bool linkup);
537
538static int team_port_add(struct team *team, struct net_device *port_dev)
539{
540 struct net_device *dev = team->dev;
541 struct team_port *port;
542 char *portname = port_dev->name;
543 int err;
544
545 if (port_dev->flags & IFF_LOOPBACK ||
546 port_dev->type != ARPHRD_ETHER) {
547 netdev_err(dev, "Device %s is of an unsupported type\n",
548 portname);
549 return -EINVAL;
550 }
551
552 if (team_port_exists(port_dev)) {
553 netdev_err(dev, "Device %s is already a port "
554 "of a team device\n", portname);
555 return -EBUSY;
556 }
557
558 if (port_dev->flags & IFF_UP) {
559 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
560 portname);
561 return -EBUSY;
562 }
563
564 port = kzalloc(sizeof(struct team_port), GFP_KERNEL);
565 if (!port)
566 return -ENOMEM;
567
568 port->dev = port_dev;
569 port->team = team;
570
571 port->orig.mtu = port_dev->mtu;
572 err = dev_set_mtu(port_dev, dev->mtu);
573 if (err) {
574 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
575 goto err_set_mtu;
576 }
577
578 memcpy(port->orig.dev_addr, port_dev->dev_addr, ETH_ALEN);
579
580 err = team_port_enter(team, port);
581 if (err) {
582 netdev_err(dev, "Device %s failed to enter team mode\n",
583 portname);
584 goto err_port_enter;
585 }
586
587 err = dev_open(port_dev);
588 if (err) {
589 netdev_dbg(dev, "Device %s opening failed\n",
590 portname);
591 goto err_dev_open;
592 }
593
594 err = netdev_set_master(port_dev, dev);
595 if (err) {
596 netdev_err(dev, "Device %s failed to set master\n", portname);
597 goto err_set_master;
598 }
599
600 err = netdev_rx_handler_register(port_dev, team_handle_frame,
601 port);
602 if (err) {
603 netdev_err(dev, "Device %s failed to register rx_handler\n",
604 portname);
605 goto err_handler_register;
606 }
607
608 team_port_list_add_port(team, port);
609 team_adjust_ops(team);
610 __team_compute_features(team);
611 __team_port_change_check(port, !!netif_carrier_ok(port_dev));
612
613 netdev_info(dev, "Port device %s added\n", portname);
614
615 return 0;
616
617err_handler_register:
618 netdev_set_master(port_dev, NULL);
619
620err_set_master:
621 dev_close(port_dev);
622
623err_dev_open:
624 team_port_leave(team, port);
625 team_port_set_orig_mac(port);
626
627err_port_enter:
628 dev_set_mtu(port_dev, port->orig.mtu);
629
630err_set_mtu:
631 kfree(port);
632
633 return err;
634}
635
636static int team_port_del(struct team *team, struct net_device *port_dev)
637{
638 struct net_device *dev = team->dev;
639 struct team_port *port;
640 char *portname = port_dev->name;
641
642 port = team_port_get_rtnl(port_dev);
643 if (!port || !team_port_find(team, port)) {
644 netdev_err(dev, "Device %s does not act as a port of this team\n",
645 portname);
646 return -ENOENT;
647 }
648
649 __team_port_change_check(port, false);
650 team_port_list_del_port(team, port);
651 team_adjust_ops(team);
652 netdev_rx_handler_unregister(port_dev);
653 netdev_set_master(port_dev, NULL);
654 dev_close(port_dev);
655 team_port_leave(team, port);
656 team_port_set_orig_mac(port);
657 dev_set_mtu(port_dev, port->orig.mtu);
658 synchronize_rcu();
659 kfree(port);
660 netdev_info(dev, "Port device %s removed\n", portname);
661 __team_compute_features(team);
662
663 return 0;
664}
665
666
667/*****************
668 * Net device ops
669 *****************/
670
671static const char team_no_mode_kind[] = "*NOMODE*";
672
673static int team_mode_option_get(struct team *team, void *arg)
674{
675 const char **str = arg;
676
677 *str = team->mode ? team->mode->kind : team_no_mode_kind;
678 return 0;
679}
680
681static int team_mode_option_set(struct team *team, void *arg)
682{
683 const char **str = arg;
684
685 return team_change_mode(team, *str);
686}
687
358b8382 688static const struct team_option team_options[] = {
3d249d4c
JP		 689 {
690 .name = "mode",
691 .type = TEAM_OPTION_TYPE_STRING,
692 .getter = team_mode_option_get,
693 .setter = team_mode_option_set,
694 },
695};
696
697static int team_init(struct net_device *dev)
698{
699 struct team *team = netdev_priv(dev);
700 int i;
358b8382 701 int err;
3d249d4c
JP		 702
703 team->dev = dev;
61dc3461 704 mutex_init(&team->lock);
3d249d4c
JP		 705
706 team->pcpu_stats = alloc_percpu(struct team_pcpu_stats);
707 if (!team->pcpu_stats)
708 return -ENOMEM;
709
710 for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
711 INIT_HLIST_HEAD(&team->port_hlist[i]);
712 INIT_LIST_HEAD(&team->port_list);
713
714 team_adjust_ops(team);
715
716 INIT_LIST_HEAD(&team->option_list);
358b8382
JP		 717 err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
718 if (err)
719 goto err_options_register;
3d249d4c
JP		 720 netif_carrier_off(dev);
721
722 return 0;
358b8382
JP		 723
724err_options_register:
725 free_percpu(team->pcpu_stats);
726
727 return err;
3d249d4c
JP		 728}
729
730static void team_uninit(struct net_device *dev)
731{
732 struct team *team = netdev_priv(dev);
733 struct team_port *port;
734 struct team_port *tmp;
735
61dc3461 736 mutex_lock(&team->lock);
3d249d4c
JP		 737 list_for_each_entry_safe(port, tmp, &team->port_list, list)
738 team_port_del(team, port->dev);
739
740 __team_change_mode(team, NULL); /* cleanup */
741 __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
61dc3461 742 mutex_unlock(&team->lock);
3d249d4c
JP		 743}
744
745static void team_destructor(struct net_device *dev)
746{
747 struct team *team = netdev_priv(dev);
748
749 free_percpu(team->pcpu_stats);
750 free_netdev(dev);
751}
752
753static int team_open(struct net_device *dev)
754{
755 netif_carrier_on(dev);
756 return 0;
757}
758
759static int team_close(struct net_device *dev)
760{
761 netif_carrier_off(dev);
762 return 0;
763}
764
765/*
766 * note: already called with rcu_read_lock
767 */
768static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
769{
770 struct team *team = netdev_priv(dev);
771 bool tx_success = false;
772 unsigned int len = skb->len;
773
774 tx_success = team->ops.transmit(team, skb);
775 if (tx_success) {
776 struct team_pcpu_stats *pcpu_stats;
777
778 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
779 u64_stats_update_begin(&pcpu_stats->syncp);
780 pcpu_stats->tx_packets++;
781 pcpu_stats->tx_bytes += len;
782 u64_stats_update_end(&pcpu_stats->syncp);
783 } else {
784 this_cpu_inc(team->pcpu_stats->tx_dropped);
785 }
786
787 return NETDEV_TX_OK;
788}
789
790static void team_change_rx_flags(struct net_device *dev, int change)
791{
792 struct team *team = netdev_priv(dev);
793 struct team_port *port;
794 int inc;
795
796 rcu_read_lock();
797 list_for_each_entry_rcu(port, &team->port_list, list) {
798 if (change & IFF_PROMISC) {
799 inc = dev->flags & IFF_PROMISC ? 1 : -1;
800 dev_set_promiscuity(port->dev, inc);
801 }
802 if (change & IFF_ALLMULTI) {
803 inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
804 dev_set_allmulti(port->dev, inc);
805 }
806 }
807 rcu_read_unlock();
808}
809
810static void team_set_rx_mode(struct net_device *dev)
811{
812 struct team *team = netdev_priv(dev);
813 struct team_port *port;
814
815 rcu_read_lock();
816 list_for_each_entry_rcu(port, &team->port_list, list) {
817 dev_uc_sync(port->dev, dev);
818 dev_mc_sync(port->dev, dev);
819 }
820 rcu_read_unlock();
821}
822
823static int team_set_mac_address(struct net_device *dev, void *p)
824{
825 struct team *team = netdev_priv(dev);
826 struct team_port *port;
827 struct sockaddr *addr = p;
828
829 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
830 rcu_read_lock();
831 list_for_each_entry_rcu(port, &team->port_list, list)
832 if (team->ops.port_change_mac)
833 team->ops.port_change_mac(team, port);
834 rcu_read_unlock();
835 return 0;
836}
837
838static int team_change_mtu(struct net_device *dev, int new_mtu)
839{
840 struct team *team = netdev_priv(dev);
841 struct team_port *port;
842 int err;
843
844 /*
845 * Alhough this is reader, it's guarded by team lock. It's not possible
846 * to traverse list in reverse under rcu_read_lock
847 */
61dc3461 848 mutex_lock(&team->lock);
3d249d4c
JP		 849 list_for_each_entry(port, &team->port_list, list) {
850 err = dev_set_mtu(port->dev, new_mtu);
851 if (err) {
852 netdev_err(dev, "Device %s failed to change mtu",
853 port->dev->name);
854 goto unwind;
855 }
856 }
61dc3461 857 mutex_unlock(&team->lock);
3d249d4c
JP		 858
859 dev->mtu = new_mtu;
860
861 return 0;
862
863unwind:
864 list_for_each_entry_continue_reverse(port, &team->port_list, list)
865 dev_set_mtu(port->dev, dev->mtu);
61dc3461 866 mutex_unlock(&team->lock);
3d249d4c
JP		 867
868 return err;
869}
870
871static struct rtnl_link_stats64 *
872team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
873{
874 struct team *team = netdev_priv(dev);
875 struct team_pcpu_stats *p;
876 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
877 u32 rx_dropped = 0, tx_dropped = 0;
878 unsigned int start;
879 int i;
880
881 for_each_possible_cpu(i) {
882 p = per_cpu_ptr(team->pcpu_stats, i);
883 do {
884 start = u64_stats_fetch_begin_bh(&p->syncp);
885 rx_packets = p->rx_packets;
886 rx_bytes = p->rx_bytes;
887 rx_multicast = p->rx_multicast;
888 tx_packets = p->tx_packets;
889 tx_bytes = p->tx_bytes;
890 } while (u64_stats_fetch_retry_bh(&p->syncp, start));
891
892 stats->rx_packets += rx_packets;
893 stats->rx_bytes += rx_bytes;
894 stats->multicast += rx_multicast;
895 stats->tx_packets += tx_packets;
896 stats->tx_bytes += tx_bytes;
897 /*
898 * rx_dropped & tx_dropped are u32, updated
899 * without syncp protection.
900 */
901 rx_dropped += p->rx_dropped;
902 tx_dropped += p->tx_dropped;
903 }
904 stats->rx_dropped = rx_dropped;
905 stats->tx_dropped = tx_dropped;
906 return stats;
907}
908
909static void team_vlan_rx_add_vid(struct net_device *dev, uint16_t vid)
910{
911 struct team *team = netdev_priv(dev);
912 struct team_port *port;
913
914 rcu_read_lock();
915 list_for_each_entry_rcu(port, &team->port_list, list) {
916 const struct net_device_ops *ops = port->dev->netdev_ops;
917
918 if (ops->ndo_vlan_rx_add_vid)
919 ops->ndo_vlan_rx_add_vid(port->dev, vid);
920 }
921 rcu_read_unlock();
922}
923
924static void team_vlan_rx_kill_vid(struct net_device *dev, uint16_t vid)
925{
926 struct team *team = netdev_priv(dev);
927 struct team_port *port;
928
929 rcu_read_lock();
930 list_for_each_entry_rcu(port, &team->port_list, list) {
931 const struct net_device_ops *ops = port->dev->netdev_ops;
932
933 if (ops->ndo_vlan_rx_kill_vid)
934 ops->ndo_vlan_rx_kill_vid(port->dev, vid);
935 }
936 rcu_read_unlock();
937}
938
939static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
940{
941 struct team *team = netdev_priv(dev);
942 int err;
943
61dc3461 944 mutex_lock(&team->lock);
3d249d4c 945 err = team_port_add(team, port_dev);
61dc3461 946 mutex_unlock(&team->lock);
3d249d4c
JP		 947 return err;
948}
949
950static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
951{
952 struct team *team = netdev_priv(dev);
953 int err;
954
61dc3461 955 mutex_lock(&team->lock);
3d249d4c 956 err = team_port_del(team, port_dev);
61dc3461 957 mutex_unlock(&team->lock);
3d249d4c
JP		 958 return err;
959}
960
234a8fd4
JP		 961static netdev_features_t team_fix_features(struct net_device *dev,
962 netdev_features_t features)
963{
964 struct team_port *port;
965 struct team *team = netdev_priv(dev);
966 netdev_features_t mask;
967
968 mask = features;
969 features &= ~NETIF_F_ONE_FOR_ALL;
970 features |= NETIF_F_ALL_FOR_ALL;
971
972 rcu_read_lock();
973 list_for_each_entry_rcu(port, &team->port_list, list) {
974 features = netdev_increment_features(features,
975 port->dev->features,
976 mask);
977 }
978 rcu_read_unlock();
979 return features;
980}
981
3d249d4c
JP		 982static const struct net_device_ops team_netdev_ops = {
983 .ndo_init = team_init,
984 .ndo_uninit = team_uninit,
985 .ndo_open = team_open,
986 .ndo_stop = team_close,
987 .ndo_start_xmit = team_xmit,
988 .ndo_change_rx_flags = team_change_rx_flags,
989 .ndo_set_rx_mode = team_set_rx_mode,
990 .ndo_set_mac_address = team_set_mac_address,
991 .ndo_change_mtu = team_change_mtu,
992 .ndo_get_stats64 = team_get_stats64,
993 .ndo_vlan_rx_add_vid = team_vlan_rx_add_vid,
994 .ndo_vlan_rx_kill_vid = team_vlan_rx_kill_vid,
995 .ndo_add_slave = team_add_slave,
996 .ndo_del_slave = team_del_slave,
234a8fd4 997 .ndo_fix_features = team_fix_features,
3d249d4c
JP		 998};
999
1000
1001/***********************
1002 * rt netlink interface
1003 ***********************/
1004
1005static void team_setup(struct net_device *dev)
1006{
1007 ether_setup(dev);
1008
1009 dev->netdev_ops = &team_netdev_ops;
1010 dev->destructor = team_destructor;
1011 dev->tx_queue_len = 0;
1012 dev->flags |= IFF_MULTICAST;
1013 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
1014
1015 /*
1016 * Indicate we support unicast address filtering. That way core won't
1017 * bring us to promisc mode in case a unicast addr is added.
1018 * Let this up to underlay drivers.
1019 */
1020 dev->priv_flags |= IFF_UNICAST_FLT;
1021
1022 dev->features |= NETIF_F_LLTX;
1023 dev->features |= NETIF_F_GRO;
1024 dev->hw_features = NETIF_F_HW_VLAN_TX |
1025 NETIF_F_HW_VLAN_RX |
1026 NETIF_F_HW_VLAN_FILTER;
1027
1028 dev->features |= dev->hw_features;
1029}
1030
1031static int team_newlink(struct net *src_net, struct net_device *dev,
1032 struct nlattr *tb[], struct nlattr *data[])
1033{
1034 int err;
1035
1036 if (tb[IFLA_ADDRESS] == NULL)
1037 random_ether_addr(dev->dev_addr);
1038
1039 err = register_netdevice(dev);
1040 if (err)
1041 return err;
1042
1043 return 0;
1044}
1045
1046static int team_validate(struct nlattr *tb[], struct nlattr *data[])
1047{
1048 if (tb[IFLA_ADDRESS]) {
1049 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
1050 return -EINVAL;
1051 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
1052 return -EADDRNOTAVAIL;
1053 }
1054 return 0;
1055}
1056
1057static struct rtnl_link_ops team_link_ops __read_mostly = {
1058 .kind = DRV_NAME,
1059 .priv_size = sizeof(struct team),
1060 .setup = team_setup,
1061 .newlink = team_newlink,
1062 .validate = team_validate,
1063};
1064
1065
1066/***********************************
1067 * Generic netlink custom interface
1068 ***********************************/
1069
1070static struct genl_family team_nl_family = {
1071 .id = GENL_ID_GENERATE,
1072 .name = TEAM_GENL_NAME,
1073 .version = TEAM_GENL_VERSION,
1074 .maxattr = TEAM_ATTR_MAX,
1075 .netnsok = true,
1076};
1077
1078static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
1079 [TEAM_ATTR_UNSPEC] = { .type = NLA_UNSPEC, },
1080 [TEAM_ATTR_TEAM_IFINDEX] = { .type = NLA_U32 },
1081 [TEAM_ATTR_LIST_OPTION] = { .type = NLA_NESTED },
1082 [TEAM_ATTR_LIST_PORT] = { .type = NLA_NESTED },
1083};
1084
1085static const struct nla_policy
1086team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
1087 [TEAM_ATTR_OPTION_UNSPEC] = { .type = NLA_UNSPEC, },
1088 [TEAM_ATTR_OPTION_NAME] = {
1089 .type = NLA_STRING,
1090 .len = TEAM_STRING_MAX_LEN,
1091 },
1092 [TEAM_ATTR_OPTION_CHANGED] = { .type = NLA_FLAG },
1093 [TEAM_ATTR_OPTION_TYPE] = { .type = NLA_U8 },
1094 [TEAM_ATTR_OPTION_DATA] = {
1095 .type = NLA_BINARY,
1096 .len = TEAM_STRING_MAX_LEN,
1097 },
1098};
1099
1100static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
1101{
1102 struct sk_buff *msg;
1103 void *hdr;
1104 int err;
1105
1106 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1107 if (!msg)
1108 return -ENOMEM;
1109
1110 hdr = genlmsg_put(msg, info->snd_pid, info->snd_seq,
1111 &team_nl_family, 0, TEAM_CMD_NOOP);
1112 if (IS_ERR(hdr)) {
1113 err = PTR_ERR(hdr);
1114 goto err_msg_put;
1115 }
1116
1117 genlmsg_end(msg, hdr);
1118
1119 return genlmsg_unicast(genl_info_net(info), msg, info->snd_pid);
1120
1121err_msg_put:
1122 nlmsg_free(msg);
1123
1124 return err;
1125}
1126
1127/*
1128 * Netlink cmd functions should be locked by following two functions.
8c0713a5 1129 * Since dev gets held here, that ensures dev won't disappear in between.
3d249d4c
JP		 1130 */
1131static struct team *team_nl_team_get(struct genl_info *info)
1132{
1133 struct net *net = genl_info_net(info);
1134 int ifindex;
1135 struct net_device *dev;
1136 struct team *team;
1137
1138 if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
1139 return NULL;
1140
1141 ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
8c0713a5 1142 dev = dev_get_by_index(net, ifindex);
3d249d4c 1143 if (!dev || dev->netdev_ops != &team_netdev_ops) {
8c0713a5
JP		 1144 if (dev)
1145 dev_put(dev);
3d249d4c
JP		 1146 return NULL;
1147 }
1148
1149 team = netdev_priv(dev);
61dc3461 1150 mutex_lock(&team->lock);
3d249d4c
JP		 1151 return team;
1152}
1153
1154static void team_nl_team_put(struct team *team)
1155{
61dc3461 1156 mutex_unlock(&team->lock);
8c0713a5 1157 dev_put(team->dev);
3d249d4c
JP		 1158}
1159
1160static int team_nl_send_generic(struct genl_info *info, struct team *team,
1161 int (*fill_func)(struct sk_buff *skb,
1162 struct genl_info *info,
1163 int flags, struct team *team))
1164{
1165 struct sk_buff *skb;
1166 int err;
1167
1168 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1169 if (!skb)
1170 return -ENOMEM;
1171
1172 err = fill_func(skb, info, NLM_F_ACK, team);
1173 if (err < 0)
1174 goto err_fill;
1175
1176 err = genlmsg_unicast(genl_info_net(info), skb, info->snd_pid);
1177 return err;
1178
1179err_fill:
1180 nlmsg_free(skb);
1181 return err;
1182}
1183
1184static int team_nl_fill_options_get_changed(struct sk_buff *skb,
1185 u32 pid, u32 seq, int flags,
1186 struct team *team,
1187 struct team_option *changed_option)
1188{
1189 struct nlattr *option_list;
1190 void *hdr;
1191 struct team_option *option;
1192
1193 hdr = genlmsg_put(skb, pid, seq, &team_nl_family, flags,
1194 TEAM_CMD_OPTIONS_GET);
1195 if (IS_ERR(hdr))
1196 return PTR_ERR(hdr);
1197
1198 NLA_PUT_U32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex);
1199 option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
1200 if (!option_list)
1201 return -EMSGSIZE;
1202
1203 list_for_each_entry(option, &team->option_list, list) {
1204 struct nlattr *option_item;
1205 long arg;
1206
1207 option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
1208 if (!option_item)
1209 goto nla_put_failure;
1210 NLA_PUT_STRING(skb, TEAM_ATTR_OPTION_NAME, option->name);
1211 if (option == changed_option)
1212 NLA_PUT_FLAG(skb, TEAM_ATTR_OPTION_CHANGED);
1213 switch (option->type) {
1214 case TEAM_OPTION_TYPE_U32:
1215 NLA_PUT_U8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32);
1216 team_option_get(team, option, &arg);
1217 NLA_PUT_U32(skb, TEAM_ATTR_OPTION_DATA, arg);
1218 break;
1219 case TEAM_OPTION_TYPE_STRING:
1220 NLA_PUT_U8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING);
1221 team_option_get(team, option, &arg);
1222 NLA_PUT_STRING(skb, TEAM_ATTR_OPTION_DATA,
1223 (char *) arg);
1224 break;
1225 default:
1226 BUG();
1227 }
1228 nla_nest_end(skb, option_item);
1229 }
1230
1231 nla_nest_end(skb, option_list);
1232 return genlmsg_end(skb, hdr);
1233
1234nla_put_failure:
1235 genlmsg_cancel(skb, hdr);
1236 return -EMSGSIZE;
1237}
1238
1239static int team_nl_fill_options_get(struct sk_buff *skb,
1240 struct genl_info *info, int flags,
1241 struct team *team)
1242{
1243 return team_nl_fill_options_get_changed(skb, info->snd_pid,
1244 info->snd_seq, NLM_F_ACK,
1245 team, NULL);
1246}
1247
1248static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
1249{
1250 struct team *team;
1251 int err;
1252
1253 team = team_nl_team_get(info);
1254 if (!team)
1255 return -EINVAL;
1256
1257 err = team_nl_send_generic(info, team, team_nl_fill_options_get);
1258
1259 team_nl_team_put(team);
1260
1261 return err;
1262}
1263
1264static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
1265{
1266 struct team *team;
1267 int err = 0;
1268 int i;
1269 struct nlattr *nl_option;
1270
1271 team = team_nl_team_get(info);
1272 if (!team)
1273 return -EINVAL;
1274
1275 err = -EINVAL;
1276 if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
1277 err = -EINVAL;
1278 goto team_put;
1279 }
1280
1281 nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
1282 struct nlattr *mode_attrs[TEAM_ATTR_OPTION_MAX + 1];
1283 enum team_option_type opt_type;
1284 struct team_option *option;
1285 char *opt_name;
1286 bool opt_found = false;
1287
1288 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
1289 err = -EINVAL;
1290 goto team_put;
1291 }
1292 err = nla_parse_nested(mode_attrs, TEAM_ATTR_OPTION_MAX,
1293 nl_option, team_nl_option_policy);
1294 if (err)
1295 goto team_put;
1296 if (!mode_attrs[TEAM_ATTR_OPTION_NAME] ||
1297 !mode_attrs[TEAM_ATTR_OPTION_TYPE] ||
1298 !mode_attrs[TEAM_ATTR_OPTION_DATA]) {
1299 err = -EINVAL;
1300 goto team_put;
1301 }
1302 switch (nla_get_u8(mode_attrs[TEAM_ATTR_OPTION_TYPE])) {
1303 case NLA_U32:
1304 opt_type = TEAM_OPTION_TYPE_U32;
1305 break;
1306 case NLA_STRING:
1307 opt_type = TEAM_OPTION_TYPE_STRING;
1308 break;
1309 default:
1310 goto team_put;
1311 }
1312
1313 opt_name = nla_data(mode_attrs[TEAM_ATTR_OPTION_NAME]);
1314 list_for_each_entry(option, &team->option_list, list) {
1315 long arg;
1316 struct nlattr *opt_data_attr;
1317
1318 if (option->type != opt_type ||
1319 strcmp(option->name, opt_name))
1320 continue;
1321 opt_found = true;
1322 opt_data_attr = mode_attrs[TEAM_ATTR_OPTION_DATA];
1323 switch (opt_type) {
1324 case TEAM_OPTION_TYPE_U32:
1325 arg = nla_get_u32(opt_data_attr);
1326 break;
1327 case TEAM_OPTION_TYPE_STRING:
1328 arg = (long) nla_data(opt_data_attr);
1329 break;
1330 default:
1331 BUG();
1332 }
1333 err = team_option_set(team, option, &arg);
1334 if (err)
1335 goto team_put;
1336 }
1337 if (!opt_found) {
1338 err = -ENOENT;
1339 goto team_put;
1340 }
1341 }
1342
1343team_put:
1344 team_nl_team_put(team);
1345
1346 return err;
1347}
1348
1349static int team_nl_fill_port_list_get_changed(struct sk_buff *skb,
1350 u32 pid, u32 seq, int flags,
1351 struct team *team,
1352 struct team_port *changed_port)
1353{
1354 struct nlattr *port_list;
1355 void *hdr;
1356 struct team_port *port;
1357
1358 hdr = genlmsg_put(skb, pid, seq, &team_nl_family, flags,
1359 TEAM_CMD_PORT_LIST_GET);
1360 if (IS_ERR(hdr))
1361 return PTR_ERR(hdr);
1362
1363 NLA_PUT_U32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex);
1364 port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
1365 if (!port_list)
1366 return -EMSGSIZE;
1367
1368 list_for_each_entry(port, &team->port_list, list) {
1369 struct nlattr *port_item;
1370
1371 port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
1372 if (!port_item)
1373 goto nla_put_failure;
1374 NLA_PUT_U32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex);
1375 if (port == changed_port)
1376 NLA_PUT_FLAG(skb, TEAM_ATTR_PORT_CHANGED);
1377 if (port->linkup)
1378 NLA_PUT_FLAG(skb, TEAM_ATTR_PORT_LINKUP);
1379 NLA_PUT_U32(skb, TEAM_ATTR_PORT_SPEED, port->speed);
1380 NLA_PUT_U8(skb, TEAM_ATTR_PORT_DUPLEX, port->duplex);
1381 nla_nest_end(skb, port_item);
1382 }
1383
1384 nla_nest_end(skb, port_list);
1385 return genlmsg_end(skb, hdr);
1386
1387nla_put_failure:
1388 genlmsg_cancel(skb, hdr);
1389 return -EMSGSIZE;
1390}
1391
1392static int team_nl_fill_port_list_get(struct sk_buff *skb,
1393 struct genl_info *info, int flags,
1394 struct team *team)
1395{
1396 return team_nl_fill_port_list_get_changed(skb, info->snd_pid,
1397 info->snd_seq, NLM_F_ACK,
1398 team, NULL);
1399}
1400
1401static int team_nl_cmd_port_list_get(struct sk_buff *skb,
1402 struct genl_info *info)
1403{
1404 struct team *team;
1405 int err;
1406
1407 team = team_nl_team_get(info);
1408 if (!team)
1409 return -EINVAL;
1410
1411 err = team_nl_send_generic(info, team, team_nl_fill_port_list_get);
1412
1413 team_nl_team_put(team);
1414
1415 return err;
1416}
1417
1418static struct genl_ops team_nl_ops[] = {
1419 {
1420 .cmd = TEAM_CMD_NOOP,
1421 .doit = team_nl_cmd_noop,
1422 .policy = team_nl_policy,
1423 },
1424 {
1425 .cmd = TEAM_CMD_OPTIONS_SET,
1426 .doit = team_nl_cmd_options_set,
1427 .policy = team_nl_policy,
1428 .flags = GENL_ADMIN_PERM,
1429 },
1430 {
1431 .cmd = TEAM_CMD_OPTIONS_GET,
1432 .doit = team_nl_cmd_options_get,
1433 .policy = team_nl_policy,
1434 .flags = GENL_ADMIN_PERM,
1435 },
1436 {
1437 .cmd = TEAM_CMD_PORT_LIST_GET,
1438 .doit = team_nl_cmd_port_list_get,
1439 .policy = team_nl_policy,
1440 .flags = GENL_ADMIN_PERM,
1441 },
1442};
1443
1444static struct genl_multicast_group team_change_event_mcgrp = {
1445 .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME,
1446};
1447
1448static int team_nl_send_event_options_get(struct team *team,
1449 struct team_option *changed_option)
1450{
1451 struct sk_buff *skb;
1452 int err;
1453 struct net *net = dev_net(team->dev);
1454
1455 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1456 if (!skb)
1457 return -ENOMEM;
1458
1459 err = team_nl_fill_options_get_changed(skb, 0, 0, 0, team,
1460 changed_option);
1461 if (err < 0)
1462 goto err_fill;
1463
1464 err = genlmsg_multicast_netns(net, skb, 0, team_change_event_mcgrp.id,
1465 GFP_KERNEL);
1466 return err;
1467
1468err_fill:
1469 nlmsg_free(skb);
1470 return err;
1471}
1472
1473static int team_nl_send_event_port_list_get(struct team_port *port)
1474{
1475 struct sk_buff *skb;
1476 int err;
1477 struct net *net = dev_net(port->team->dev);
1478
1479 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1480 if (!skb)
1481 return -ENOMEM;
1482
1483 err = team_nl_fill_port_list_get_changed(skb, 0, 0, 0,
1484 port->team, port);
1485 if (err < 0)
1486 goto err_fill;
1487
1488 err = genlmsg_multicast_netns(net, skb, 0, team_change_event_mcgrp.id,
1489 GFP_KERNEL);
1490 return err;
1491
1492err_fill:
1493 nlmsg_free(skb);
1494 return err;
1495}
1496
1497static int team_nl_init(void)
1498{
1499 int err;
1500
1501 err = genl_register_family_with_ops(&team_nl_family, team_nl_ops,
1502 ARRAY_SIZE(team_nl_ops));
1503 if (err)
1504 return err;
1505
1506 err = genl_register_mc_group(&team_nl_family, &team_change_event_mcgrp);
1507 if (err)
1508 goto err_change_event_grp_reg;
1509
1510 return 0;
1511
1512err_change_event_grp_reg:
1513 genl_unregister_family(&team_nl_family);
1514
1515 return err;
1516}
1517
1518static void team_nl_fini(void)
1519{
1520 genl_unregister_family(&team_nl_family);
1521}
1522
1523
1524/******************
1525 * Change checkers
1526 ******************/
1527
1528static void __team_options_change_check(struct team *team,
1529 struct team_option *changed_option)
1530{
1531 int err;
1532
1533 err = team_nl_send_event_options_get(team, changed_option);
1534 if (err)
1535 netdev_warn(team->dev, "Failed to send options change via netlink\n");
1536}
1537
1538/* rtnl lock is held */
1539static void __team_port_change_check(struct team_port *port, bool linkup)
1540{
1541 int err;
1542
1543 if (port->linkup == linkup)
1544 return;
1545
1546 port->linkup = linkup;
1547 if (linkup) {
1548 struct ethtool_cmd ecmd;
1549
1550 err = __ethtool_get_settings(port->dev, &ecmd);
1551 if (!err) {
1552 port->speed = ethtool_cmd_speed(&ecmd);
1553 port->duplex = ecmd.duplex;
1554 goto send_event;
1555 }
1556 }
1557 port->speed = 0;
1558 port->duplex = 0;
1559
1560send_event:
1561 err = team_nl_send_event_port_list_get(port);
1562 if (err)
1563 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink\n",
1564 port->dev->name);
1565
1566}
1567
1568static void team_port_change_check(struct team_port *port, bool linkup)
1569{
1570 struct team *team = port->team;
1571
61dc3461 1572 mutex_lock(&team->lock);
3d249d4c 1573 __team_port_change_check(port, linkup);
61dc3461 1574 mutex_unlock(&team->lock);
3d249d4c
JP		 1575}
1576
1577/************************************
1578 * Net device notifier event handler
1579 ************************************/
1580
1581static int team_device_event(struct notifier_block *unused,
1582 unsigned long event, void *ptr)
1583{
1584 struct net_device *dev = (struct net_device *) ptr;
1585 struct team_port *port;
1586
1587 port = team_port_get_rtnl(dev);
1588 if (!port)
1589 return NOTIFY_DONE;
1590
1591 switch (event) {
1592 case NETDEV_UP:
1593 if (netif_carrier_ok(dev))
1594 team_port_change_check(port, true);
1595 case NETDEV_DOWN:
1596 team_port_change_check(port, false);
1597 case NETDEV_CHANGE:
1598 if (netif_running(port->dev))
1599 team_port_change_check(port,
1600 !!netif_carrier_ok(port->dev));
1601 break;
1602 case NETDEV_UNREGISTER:
1603 team_del_slave(port->team->dev, dev);
1604 break;
1605 case NETDEV_FEAT_CHANGE:
1606 team_compute_features(port->team);
1607 break;
1608 case NETDEV_CHANGEMTU:
1609 /* Forbid to change mtu of underlaying device */
1610 return NOTIFY_BAD;
1611 case NETDEV_PRE_TYPE_CHANGE:
1612 /* Forbid to change type of underlaying device */
1613 return NOTIFY_BAD;
1614 }
1615 return NOTIFY_DONE;
1616}
1617
1618static struct notifier_block team_notifier_block __read_mostly = {
1619 .notifier_call = team_device_event,
1620};
1621
1622
1623/***********************
1624 * Module init and exit
1625 ***********************/
1626
1627static int __init team_module_init(void)
1628{
1629 int err;
1630
1631 register_netdevice_notifier(&team_notifier_block);
1632
1633 err = rtnl_link_register(&team_link_ops);
1634 if (err)
1635 goto err_rtnl_reg;
1636
1637 err = team_nl_init();
1638 if (err)
1639 goto err_nl_init;
1640
1641 return 0;
1642
1643err_nl_init:
1644 rtnl_link_unregister(&team_link_ops);
1645
1646err_rtnl_reg:
1647 unregister_netdevice_notifier(&team_notifier_block);
1648
1649 return err;
1650}
1651
1652static void __exit team_module_exit(void)
1653{
1654 team_nl_fini();
1655 rtnl_link_unregister(&team_link_ops);
1656 unregister_netdevice_notifier(&team_notifier_block);
1657}
1658
1659module_init(team_module_init);
1660module_exit(team_module_exit);
1661
1662MODULE_LICENSE("GPL v2");
1663MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
1664MODULE_DESCRIPTION("Ethernet team device driver");
1665MODULE_ALIAS_RTNL_LINK(DRV_NAME);
Linux 6.x block layer and io_uring tree(s)