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1/*
2 * net/drivers/team/team.c - Network team device driver
3 * Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 */
10
11#include <linux/kernel.h>
12#include <linux/types.h>
13#include <linux/module.h>
14#include <linux/init.h>
15#include <linux/slab.h>
16#include <linux/rcupdate.h>
17#include <linux/errno.h>
18#include <linux/ctype.h>
19#include <linux/notifier.h>
20#include <linux/netdevice.h>
21#include <linux/if_vlan.h>
22#include <linux/if_arp.h>
23#include <linux/socket.h>
24#include <linux/etherdevice.h>
25#include <linux/rtnetlink.h>
26#include <net/rtnetlink.h>
27#include <net/genetlink.h>
28#include <net/netlink.h>
29#include <linux/if_team.h>
30
31#define DRV_NAME "team"
32
33
34/**********
35 * Helpers
36 **********/
37
38#define team_port_exists(dev) (dev->priv_flags & IFF_TEAM_PORT)
39
40static struct team_port *team_port_get_rcu(const struct net_device *dev)
41{
42 struct team_port *port = rcu_dereference(dev->rx_handler_data);
43
44 return team_port_exists(dev) ? port : NULL;
45}
46
47static struct team_port *team_port_get_rtnl(const struct net_device *dev)
48{
49 struct team_port *port = rtnl_dereference(dev->rx_handler_data);
50
51 return team_port_exists(dev) ? port : NULL;
52}
53
54/*
55 * Since the ability to change mac address for open port device is tested in
56 * team_port_add, this function can be called without control of return value
57 */
58static int __set_port_mac(struct net_device *port_dev,
59 const unsigned char *dev_addr)
60{
61 struct sockaddr addr;
62
63 memcpy(addr.sa_data, dev_addr, ETH_ALEN);
64 addr.sa_family = ARPHRD_ETHER;
65 return dev_set_mac_address(port_dev, &addr);
66}
67
68static int team_port_set_orig_mac(struct team_port *port)
69{
70 return __set_port_mac(port->dev, port->orig.dev_addr);
71}
72
73int team_port_set_team_mac(struct team_port *port)
74{
75 return __set_port_mac(port->dev, port->team->dev->dev_addr);
76}
77EXPORT_SYMBOL(team_port_set_team_mac);
78
79static void team_refresh_port_linkup(struct team_port *port)
80{
81 port->linkup = port->user.linkup_enabled ? port->user.linkup :
82 port->state.linkup;
83}
84
85/*******************
86 * Options handling
87 *******************/
88
89struct team_option_inst { /* One for each option instance */
90 struct list_head list;
91 struct team_option *option;
92 struct team_port *port; /* != NULL if per-port */
93 bool changed;
94 bool removed;
95};
96
97static struct team_option *__team_find_option(struct team *team,
98 const char *opt_name)
99{
100 struct team_option *option;
101
102 list_for_each_entry(option, &team->option_list, list) {
103 if (strcmp(option->name, opt_name) == 0)
104 return option;
105 }
106 return NULL;
107}
108
109static int __team_option_inst_add(struct team *team, struct team_option *option,
110 struct team_port *port)
111{
112 struct team_option_inst *opt_inst;
113
114 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL);
115 if (!opt_inst)
116 return -ENOMEM;
117 opt_inst->option = option;
118 opt_inst->port = port;
119 opt_inst->changed = true;
120 opt_inst->removed = false;
121 list_add_tail(&opt_inst->list, &team->option_inst_list);
122 return 0;
123}
124
125static void __team_option_inst_del(struct team_option_inst *opt_inst)
126{
127 list_del(&opt_inst->list);
128 kfree(opt_inst);
129}
130
131static void __team_option_inst_del_option(struct team *team,
132 struct team_option *option)
133{
134 struct team_option_inst *opt_inst, *tmp;
135
136 list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
137 if (opt_inst->option == option)
138 __team_option_inst_del(opt_inst);
139 }
140}
141
142static int __team_option_inst_add_option(struct team *team,
143 struct team_option *option)
144{
145 struct team_port *port;
146 int err;
147
148 if (!option->per_port)
149 return __team_option_inst_add(team, option, 0);
150
151 list_for_each_entry(port, &team->port_list, list) {
152 err = __team_option_inst_add(team, option, port);
153 if (err)
154 goto inst_del_option;
155 }
156 return 0;
157
158inst_del_option:
159 __team_option_inst_del_option(team, option);
160 return err;
161}
162
163static void __team_option_inst_mark_removed_option(struct team *team,
164 struct team_option *option)
165{
166 struct team_option_inst *opt_inst;
167
168 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
169 if (opt_inst->option == option) {
170 opt_inst->changed = true;
171 opt_inst->removed = true;
172 }
173 }
174}
175
176static void __team_option_inst_del_port(struct team *team,
177 struct team_port *port)
178{
179 struct team_option_inst *opt_inst, *tmp;
180
181 list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
182 if (opt_inst->option->per_port &&
183 opt_inst->port == port)
184 __team_option_inst_del(opt_inst);
185 }
186}
187
188static int __team_option_inst_add_port(struct team *team,
189 struct team_port *port)
190{
191 struct team_option *option;
192 int err;
193
194 list_for_each_entry(option, &team->option_list, list) {
195 if (!option->per_port)
196 continue;
197 err = __team_option_inst_add(team, option, port);
198 if (err)
199 goto inst_del_port;
200 }
201 return 0;
202
203inst_del_port:
204 __team_option_inst_del_port(team, port);
205 return err;
206}
207
208static void __team_option_inst_mark_removed_port(struct team *team,
209 struct team_port *port)
210{
211 struct team_option_inst *opt_inst;
212
213 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
214 if (opt_inst->port == port) {
215 opt_inst->changed = true;
216 opt_inst->removed = true;
217 }
218 }
219}
220
221static int __team_options_register(struct team *team,
222 const struct team_option *option,
223 size_t option_count)
224{
225 int i;
226 struct team_option **dst_opts;
227 int err;
228
229 dst_opts = kzalloc(sizeof(struct team_option *) * option_count,
230 GFP_KERNEL);
231 if (!dst_opts)
232 return -ENOMEM;
233 for (i = 0; i < option_count; i++, option++) {
234 if (__team_find_option(team, option->name)) {
235 err = -EEXIST;
236 goto alloc_rollback;
237 }
238 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
239 if (!dst_opts[i]) {
240 err = -ENOMEM;
241 goto alloc_rollback;
242 }
243 }
244
245 for (i = 0; i < option_count; i++) {
246 err = __team_option_inst_add_option(team, dst_opts[i]);
247 if (err)
248 goto inst_rollback;
249 list_add_tail(&dst_opts[i]->list, &team->option_list);
250 }
251
252 kfree(dst_opts);
253 return 0;
254
255inst_rollback:
256 for (i--; i >= 0; i--)
257 __team_option_inst_del_option(team, dst_opts[i]);
258
259 i = option_count - 1;
260alloc_rollback:
261 for (i--; i >= 0; i--)
262 kfree(dst_opts[i]);
263
264 kfree(dst_opts);
265 return err;
266}
267
268static void __team_options_mark_removed(struct team *team,
269 const struct team_option *option,
270 size_t option_count)
271{
272 int i;
273
274 for (i = 0; i < option_count; i++, option++) {
275 struct team_option *del_opt;
276
277 del_opt = __team_find_option(team, option->name);
278 if (del_opt)
279 __team_option_inst_mark_removed_option(team, del_opt);
280 }
281}
282
283static void __team_options_unregister(struct team *team,
284 const struct team_option *option,
285 size_t option_count)
286{
287 int i;
288
289 for (i = 0; i < option_count; i++, option++) {
290 struct team_option *del_opt;
291
292 del_opt = __team_find_option(team, option->name);
293 if (del_opt) {
294 __team_option_inst_del_option(team, del_opt);
295 list_del(&del_opt->list);
296 kfree(del_opt);
297 }
298 }
299}
300
301static void __team_options_change_check(struct team *team);
302
303int team_options_register(struct team *team,
304 const struct team_option *option,
305 size_t option_count)
306{
307 int err;
308
309 err = __team_options_register(team, option, option_count);
310 if (err)
311 return err;
312 __team_options_change_check(team);
313 return 0;
314}
315EXPORT_SYMBOL(team_options_register);
316
317void team_options_unregister(struct team *team,
318 const struct team_option *option,
319 size_t option_count)
320{
321 __team_options_mark_removed(team, option, option_count);
322 __team_options_change_check(team);
323 __team_options_unregister(team, option, option_count);
324}
325EXPORT_SYMBOL(team_options_unregister);
326
327static int team_option_port_add(struct team *team, struct team_port *port)
328{
329 int err;
330
331 err = __team_option_inst_add_port(team, port);
332 if (err)
333 return err;
334 __team_options_change_check(team);
335 return 0;
336}
337
338static void team_option_port_del(struct team *team, struct team_port *port)
339{
340 __team_option_inst_mark_removed_port(team, port);
341 __team_options_change_check(team);
342 __team_option_inst_del_port(team, port);
343}
344
345static int team_option_get(struct team *team,
346 struct team_option_inst *opt_inst,
347 struct team_gsetter_ctx *ctx)
348{
349 return opt_inst->option->getter(team, ctx);
350}
351
352static int team_option_set(struct team *team,
353 struct team_option_inst *opt_inst,
354 struct team_gsetter_ctx *ctx)
355{
356 int err;
357
358 err = opt_inst->option->setter(team, ctx);
359 if (err)
360 return err;
361
362 opt_inst->changed = true;
363 __team_options_change_check(team);
364 return err;
365}
366
367/****************
368 * Mode handling
369 ****************/
370
371static LIST_HEAD(mode_list);
372static DEFINE_SPINLOCK(mode_list_lock);
373
374static struct team_mode *__find_mode(const char *kind)
375{
376 struct team_mode *mode;
377
378 list_for_each_entry(mode, &mode_list, list) {
379 if (strcmp(mode->kind, kind) == 0)
380 return mode;
381 }
382 return NULL;
383}
384
385static bool is_good_mode_name(const char *name)
386{
387 while (*name != '\0') {
388 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
389 return false;
390 name++;
391 }
392 return true;
393}
394
395int team_mode_register(struct team_mode *mode)
396{
397 int err = 0;
398
399 if (!is_good_mode_name(mode->kind) ||
400 mode->priv_size > TEAM_MODE_PRIV_SIZE)
401 return -EINVAL;
402 spin_lock(&mode_list_lock);
403 if (__find_mode(mode->kind)) {
404 err = -EEXIST;
405 goto unlock;
406 }
407 list_add_tail(&mode->list, &mode_list);
408unlock:
409 spin_unlock(&mode_list_lock);
410 return err;
411}
412EXPORT_SYMBOL(team_mode_register);
413
414int team_mode_unregister(struct team_mode *mode)
415{
416 spin_lock(&mode_list_lock);
417 list_del_init(&mode->list);
418 spin_unlock(&mode_list_lock);
419 return 0;
420}
421EXPORT_SYMBOL(team_mode_unregister);
422
423static struct team_mode *team_mode_get(const char *kind)
424{
425 struct team_mode *mode;
426
427 spin_lock(&mode_list_lock);
428 mode = __find_mode(kind);
429 if (!mode) {
430 spin_unlock(&mode_list_lock);
431 request_module("team-mode-%s", kind);
432 spin_lock(&mode_list_lock);
433 mode = __find_mode(kind);
434 }
435 if (mode)
436 if (!try_module_get(mode->owner))
437 mode = NULL;
438
439 spin_unlock(&mode_list_lock);
440 return mode;
441}
442
443static void team_mode_put(const struct team_mode *mode)
444{
445 module_put(mode->owner);
446}
447
448static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
449{
450 dev_kfree_skb_any(skb);
451 return false;
452}
453
454rx_handler_result_t team_dummy_receive(struct team *team,
455 struct team_port *port,
456 struct sk_buff *skb)
457{
458 return RX_HANDLER_ANOTHER;
459}
460
461static void team_adjust_ops(struct team *team)
462{
463 /*
464 * To avoid checks in rx/tx skb paths, ensure here that non-null and
465 * correct ops are always set.
466 */
467
468 if (list_empty(&team->port_list) ||
469 !team->mode || !team->mode->ops->transmit)
470 team->ops.transmit = team_dummy_transmit;
471 else
472 team->ops.transmit = team->mode->ops->transmit;
473
474 if (list_empty(&team->port_list) ||
475 !team->mode || !team->mode->ops->receive)
476 team->ops.receive = team_dummy_receive;
477 else
478 team->ops.receive = team->mode->ops->receive;
479}
480
481/*
482 * We can benefit from the fact that it's ensured no port is present
483 * at the time of mode change. Therefore no packets are in fly so there's no
484 * need to set mode operations in any special way.
485 */
486static int __team_change_mode(struct team *team,
487 const struct team_mode *new_mode)
488{
489 /* Check if mode was previously set and do cleanup if so */
490 if (team->mode) {
491 void (*exit_op)(struct team *team) = team->ops.exit;
492
493 /* Clear ops area so no callback is called any longer */
494 memset(&team->ops, 0, sizeof(struct team_mode_ops));
495 team_adjust_ops(team);
496
497 if (exit_op)
498 exit_op(team);
499 team_mode_put(team->mode);
500 team->mode = NULL;
501 /* zero private data area */
502 memset(&team->mode_priv, 0,
503 sizeof(struct team) - offsetof(struct team, mode_priv));
504 }
505
506 if (!new_mode)
507 return 0;
508
509 if (new_mode->ops->init) {
510 int err;
511
512 err = new_mode->ops->init(team);
513 if (err)
514 return err;
515 }
516
517 team->mode = new_mode;
518 memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
519 team_adjust_ops(team);
520
521 return 0;
522}
523
524static int team_change_mode(struct team *team, const char *kind)
525{
526 struct team_mode *new_mode;
527 struct net_device *dev = team->dev;
528 int err;
529
530 if (!list_empty(&team->port_list)) {
531 netdev_err(dev, "No ports can be present during mode change\n");
532 return -EBUSY;
533 }
534
535 if (team->mode && strcmp(team->mode->kind, kind) == 0) {
536 netdev_err(dev, "Unable to change to the same mode the team is in\n");
537 return -EINVAL;
538 }
539
540 new_mode = team_mode_get(kind);
541 if (!new_mode) {
542 netdev_err(dev, "Mode \"%s\" not found\n", kind);
543 return -EINVAL;
544 }
545
546 err = __team_change_mode(team, new_mode);
547 if (err) {
548 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
549 team_mode_put(new_mode);
550 return err;
551 }
552
553 netdev_info(dev, "Mode changed to \"%s\"\n", kind);
554 return 0;
555}
556
557
558/************************
559 * Rx path frame handler
560 ************************/
561
562static bool team_port_enabled(struct team_port *port);
563
564/* note: already called with rcu_read_lock */
565static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
566{
567 struct sk_buff *skb = *pskb;
568 struct team_port *port;
569 struct team *team;
570 rx_handler_result_t res;
571
572 skb = skb_share_check(skb, GFP_ATOMIC);
573 if (!skb)
574 return RX_HANDLER_CONSUMED;
575
576 *pskb = skb;
577
578 port = team_port_get_rcu(skb->dev);
579 team = port->team;
580 if (!team_port_enabled(port)) {
581 /* allow exact match delivery for disabled ports */
582 res = RX_HANDLER_EXACT;
583 } else {
584 res = team->ops.receive(team, port, skb);
585 }
586 if (res == RX_HANDLER_ANOTHER) {
587 struct team_pcpu_stats *pcpu_stats;
588
589 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
590 u64_stats_update_begin(&pcpu_stats->syncp);
591 pcpu_stats->rx_packets++;
592 pcpu_stats->rx_bytes += skb->len;
593 if (skb->pkt_type == PACKET_MULTICAST)
594 pcpu_stats->rx_multicast++;
595 u64_stats_update_end(&pcpu_stats->syncp);
596
597 skb->dev = team->dev;
598 } else {
599 this_cpu_inc(team->pcpu_stats->rx_dropped);
600 }
601
602 return res;
603}
604
605
606/****************
607 * Port handling
608 ****************/
609
610static bool team_port_find(const struct team *team,
611 const struct team_port *port)
612{
613 struct team_port *cur;
614
615 list_for_each_entry(cur, &team->port_list, list)
616 if (cur == port)
617 return true;
618 return false;
619}
620
621static bool team_port_enabled(struct team_port *port)
622{
623 return port->index != -1;
624}
625
626/*
627 * Enable/disable port by adding to enabled port hashlist and setting
628 * port->index (Might be racy so reader could see incorrect ifindex when
629 * processing a flying packet, but that is not a problem). Write guarded
630 * by team->lock.
631 */
632static void team_port_enable(struct team *team,
633 struct team_port *port)
634{
635 if (team_port_enabled(port))
636 return;
637 port->index = team->en_port_count++;
638 hlist_add_head_rcu(&port->hlist,
639 team_port_index_hash(team, port->index));
640}
641
642static void __reconstruct_port_hlist(struct team *team, int rm_index)
643{
644 int i;
645 struct team_port *port;
646
647 for (i = rm_index + 1; i < team->en_port_count; i++) {
648 port = team_get_port_by_index(team, i);
649 hlist_del_rcu(&port->hlist);
650 port->index--;
651 hlist_add_head_rcu(&port->hlist,
652 team_port_index_hash(team, port->index));
653 }
654}
655
656static void team_port_disable(struct team *team,
657 struct team_port *port)
658{
659 int rm_index = port->index;
660
661 if (!team_port_enabled(port))
662 return;
663 hlist_del_rcu(&port->hlist);
664 __reconstruct_port_hlist(team, rm_index);
665 team->en_port_count--;
666 port->index = -1;
667}
668
669#define TEAM_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \
670 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
671 NETIF_F_HIGHDMA | NETIF_F_LRO)
672
673static void __team_compute_features(struct team *team)
674{
675 struct team_port *port;
676 u32 vlan_features = TEAM_VLAN_FEATURES;
677 unsigned short max_hard_header_len = ETH_HLEN;
678
679 list_for_each_entry(port, &team->port_list, list) {
680 vlan_features = netdev_increment_features(vlan_features,
681 port->dev->vlan_features,
682 TEAM_VLAN_FEATURES);
683
684 if (port->dev->hard_header_len > max_hard_header_len)
685 max_hard_header_len = port->dev->hard_header_len;
686 }
687
688 team->dev->vlan_features = vlan_features;
689 team->dev->hard_header_len = max_hard_header_len;
690
691 netdev_change_features(team->dev);
692}
693
694static void team_compute_features(struct team *team)
695{
696 mutex_lock(&team->lock);
697 __team_compute_features(team);
698 mutex_unlock(&team->lock);
699}
700
701static int team_port_enter(struct team *team, struct team_port *port)
702{
703 int err = 0;
704
705 dev_hold(team->dev);
706 port->dev->priv_flags |= IFF_TEAM_PORT;
707 if (team->ops.port_enter) {
708 err = team->ops.port_enter(team, port);
709 if (err) {
710 netdev_err(team->dev, "Device %s failed to enter team mode\n",
711 port->dev->name);
712 goto err_port_enter;
713 }
714 }
715
716 return 0;
717
718err_port_enter:
719 port->dev->priv_flags &= ~IFF_TEAM_PORT;
720 dev_put(team->dev);
721
722 return err;
723}
724
725static void team_port_leave(struct team *team, struct team_port *port)
726{
727 if (team->ops.port_leave)
728 team->ops.port_leave(team, port);
729 port->dev->priv_flags &= ~IFF_TEAM_PORT;
730 dev_put(team->dev);
731}
732
733static void __team_port_change_check(struct team_port *port, bool linkup);
734
735static int team_port_add(struct team *team, struct net_device *port_dev)
736{
737 struct net_device *dev = team->dev;
738 struct team_port *port;
739 char *portname = port_dev->name;
740 int err;
741
742 if (port_dev->flags & IFF_LOOPBACK ||
743 port_dev->type != ARPHRD_ETHER) {
744 netdev_err(dev, "Device %s is of an unsupported type\n",
745 portname);
746 return -EINVAL;
747 }
748
749 if (team_port_exists(port_dev)) {
750 netdev_err(dev, "Device %s is already a port "
751 "of a team device\n", portname);
752 return -EBUSY;
753 }
754
755 if (port_dev->flags & IFF_UP) {
756 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
757 portname);
758 return -EBUSY;
759 }
760
761 port = kzalloc(sizeof(struct team_port), GFP_KERNEL);
762 if (!port)
763 return -ENOMEM;
764
765 port->dev = port_dev;
766 port->team = team;
767
768 port->orig.mtu = port_dev->mtu;
769 err = dev_set_mtu(port_dev, dev->mtu);
770 if (err) {
771 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
772 goto err_set_mtu;
773 }
774
775 memcpy(port->orig.dev_addr, port_dev->dev_addr, ETH_ALEN);
776
777 err = team_port_enter(team, port);
778 if (err) {
779 netdev_err(dev, "Device %s failed to enter team mode\n",
780 portname);
781 goto err_port_enter;
782 }
783
784 err = dev_open(port_dev);
785 if (err) {
786 netdev_dbg(dev, "Device %s opening failed\n",
787 portname);
788 goto err_dev_open;
789 }
790
791 err = vlan_vids_add_by_dev(port_dev, dev);
792 if (err) {
793 netdev_err(dev, "Failed to add vlan ids to device %s\n",
794 portname);
795 goto err_vids_add;
796 }
797
798 err = netdev_set_master(port_dev, dev);
799 if (err) {
800 netdev_err(dev, "Device %s failed to set master\n", portname);
801 goto err_set_master;
802 }
803
804 err = netdev_rx_handler_register(port_dev, team_handle_frame,
805 port);
806 if (err) {
807 netdev_err(dev, "Device %s failed to register rx_handler\n",
808 portname);
809 goto err_handler_register;
810 }
811
812 err = team_option_port_add(team, port);
813 if (err) {
814 netdev_err(dev, "Device %s failed to add per-port options\n",
815 portname);
816 goto err_option_port_add;
817 }
818
819 port->index = -1;
820 team_port_enable(team, port);
821 list_add_tail_rcu(&port->list, &team->port_list);
822 team_adjust_ops(team);
823 __team_compute_features(team);
824 __team_port_change_check(port, !!netif_carrier_ok(port_dev));
825
826 netdev_info(dev, "Port device %s added\n", portname);
827
828 return 0;
829
830err_option_port_add:
831 netdev_rx_handler_unregister(port_dev);
832
833err_handler_register:
834 netdev_set_master(port_dev, NULL);
835
836err_set_master:
837 vlan_vids_del_by_dev(port_dev, dev);
838
839err_vids_add:
840 dev_close(port_dev);
841
842err_dev_open:
843 team_port_leave(team, port);
844 team_port_set_orig_mac(port);
845
846err_port_enter:
847 dev_set_mtu(port_dev, port->orig.mtu);
848
849err_set_mtu:
850 kfree(port);
851
852 return err;
853}
854
855static int team_port_del(struct team *team, struct net_device *port_dev)
856{
857 struct net_device *dev = team->dev;
858 struct team_port *port;
859 char *portname = port_dev->name;
860
861 port = team_port_get_rtnl(port_dev);
862 if (!port || !team_port_find(team, port)) {
863 netdev_err(dev, "Device %s does not act as a port of this team\n",
864 portname);
865 return -ENOENT;
866 }
867
868 port->removed = true;
869 __team_port_change_check(port, false);
870 team_port_disable(team, port);
871 list_del_rcu(&port->list);
872 team_adjust_ops(team);
873 team_option_port_del(team, port);
874 netdev_rx_handler_unregister(port_dev);
875 netdev_set_master(port_dev, NULL);
876 vlan_vids_del_by_dev(port_dev, dev);
877 dev_close(port_dev);
878 team_port_leave(team, port);
879 team_port_set_orig_mac(port);
880 dev_set_mtu(port_dev, port->orig.mtu);
881 synchronize_rcu();
882 kfree(port);
883 netdev_info(dev, "Port device %s removed\n", portname);
884 __team_compute_features(team);
885
886 return 0;
887}
888
889
890/*****************
891 * Net device ops
892 *****************/
893
894static const char team_no_mode_kind[] = "*NOMODE*";
895
896static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
897{
898 ctx->data.str_val = team->mode ? team->mode->kind : team_no_mode_kind;
899 return 0;
900}
901
902static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
903{
904 return team_change_mode(team, ctx->data.str_val);
905}
906
907static int team_port_en_option_get(struct team *team,
908 struct team_gsetter_ctx *ctx)
909{
910 ctx->data.bool_val = team_port_enabled(ctx->port);
911 return 0;
912}
913
914static int team_port_en_option_set(struct team *team,
915 struct team_gsetter_ctx *ctx)
916{
917 if (ctx->data.bool_val)
918 team_port_enable(team, ctx->port);
919 else
920 team_port_disable(team, ctx->port);
921 return 0;
922}
923
924static int team_user_linkup_option_get(struct team *team,
925 struct team_gsetter_ctx *ctx)
926{
927 ctx->data.bool_val = ctx->port->user.linkup;
928 return 0;
929}
930
931static int team_user_linkup_option_set(struct team *team,
932 struct team_gsetter_ctx *ctx)
933{
934 ctx->port->user.linkup = ctx->data.bool_val;
935 team_refresh_port_linkup(ctx->port);
936 return 0;
937}
938
939static int team_user_linkup_en_option_get(struct team *team,
940 struct team_gsetter_ctx *ctx)
941{
942 struct team_port *port = ctx->port;
943
944 ctx->data.bool_val = port->user.linkup_enabled;
945 return 0;
946}
947
948static int team_user_linkup_en_option_set(struct team *team,
949 struct team_gsetter_ctx *ctx)
950{
951 struct team_port *port = ctx->port;
952
953 port->user.linkup_enabled = ctx->data.bool_val;
954 team_refresh_port_linkup(ctx->port);
955 return 0;
956}
957
958static const struct team_option team_options[] = {
959 {
960 .name = "mode",
961 .type = TEAM_OPTION_TYPE_STRING,
962 .getter = team_mode_option_get,
963 .setter = team_mode_option_set,
964 },
965 {
966 .name = "enabled",
967 .type = TEAM_OPTION_TYPE_BOOL,
968 .per_port = true,
969 .getter = team_port_en_option_get,
970 .setter = team_port_en_option_set,
971 },
972 {
973 .name = "user_linkup",
974 .type = TEAM_OPTION_TYPE_BOOL,
975 .per_port = true,
976 .getter = team_user_linkup_option_get,
977 .setter = team_user_linkup_option_set,
978 },
979 {
980 .name = "user_linkup_enabled",
981 .type = TEAM_OPTION_TYPE_BOOL,
982 .per_port = true,
983 .getter = team_user_linkup_en_option_get,
984 .setter = team_user_linkup_en_option_set,
985 },
986};
987
988static int team_init(struct net_device *dev)
989{
990 struct team *team = netdev_priv(dev);
991 int i;
992 int err;
993
994 team->dev = dev;
995 mutex_init(&team->lock);
996
997 team->pcpu_stats = alloc_percpu(struct team_pcpu_stats);
998 if (!team->pcpu_stats)
999 return -ENOMEM;
1000
1001 for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1002 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1003 INIT_LIST_HEAD(&team->port_list);
1004
1005 team_adjust_ops(team);
1006
1007 INIT_LIST_HEAD(&team->option_list);
1008 INIT_LIST_HEAD(&team->option_inst_list);
1009 err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1010 if (err)
1011 goto err_options_register;
1012 netif_carrier_off(dev);
1013
1014 return 0;
1015
1016err_options_register:
1017 free_percpu(team->pcpu_stats);
1018
1019 return err;
1020}
1021
1022static void team_uninit(struct net_device *dev)
1023{
1024 struct team *team = netdev_priv(dev);
1025 struct team_port *port;
1026 struct team_port *tmp;
1027
1028 mutex_lock(&team->lock);
1029 list_for_each_entry_safe(port, tmp, &team->port_list, list)
1030 team_port_del(team, port->dev);
1031
1032 __team_change_mode(team, NULL); /* cleanup */
1033 __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1034 mutex_unlock(&team->lock);
1035}
1036
1037static void team_destructor(struct net_device *dev)
1038{
1039 struct team *team = netdev_priv(dev);
1040
1041 free_percpu(team->pcpu_stats);
1042 free_netdev(dev);
1043}
1044
1045static int team_open(struct net_device *dev)
1046{
1047 netif_carrier_on(dev);
1048 return 0;
1049}
1050
1051static int team_close(struct net_device *dev)
1052{
1053 netif_carrier_off(dev);
1054 return 0;
1055}
1056
1057/*
1058 * note: already called with rcu_read_lock
1059 */
1060static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1061{
1062 struct team *team = netdev_priv(dev);
1063 bool tx_success = false;
1064 unsigned int len = skb->len;
1065
1066 tx_success = team->ops.transmit(team, skb);
1067 if (tx_success) {
1068 struct team_pcpu_stats *pcpu_stats;
1069
1070 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1071 u64_stats_update_begin(&pcpu_stats->syncp);
1072 pcpu_stats->tx_packets++;
1073 pcpu_stats->tx_bytes += len;
1074 u64_stats_update_end(&pcpu_stats->syncp);
1075 } else {
1076 this_cpu_inc(team->pcpu_stats->tx_dropped);
1077 }
1078
1079 return NETDEV_TX_OK;
1080}
1081
1082static void team_change_rx_flags(struct net_device *dev, int change)
1083{
1084 struct team *team = netdev_priv(dev);
1085 struct team_port *port;
1086 int inc;
1087
1088 rcu_read_lock();
1089 list_for_each_entry_rcu(port, &team->port_list, list) {
1090 if (change & IFF_PROMISC) {
1091 inc = dev->flags & IFF_PROMISC ? 1 : -1;
1092 dev_set_promiscuity(port->dev, inc);
1093 }
1094 if (change & IFF_ALLMULTI) {
1095 inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1096 dev_set_allmulti(port->dev, inc);
1097 }
1098 }
1099 rcu_read_unlock();
1100}
1101
1102static void team_set_rx_mode(struct net_device *dev)
1103{
1104 struct team *team = netdev_priv(dev);
1105 struct team_port *port;
1106
1107 rcu_read_lock();
1108 list_for_each_entry_rcu(port, &team->port_list, list) {
1109 dev_uc_sync(port->dev, dev);
1110 dev_mc_sync(port->dev, dev);
1111 }
1112 rcu_read_unlock();
1113}
1114
1115static int team_set_mac_address(struct net_device *dev, void *p)
1116{
1117 struct team *team = netdev_priv(dev);
1118 struct team_port *port;
1119 struct sockaddr *addr = p;
1120
1121 dev->addr_assign_type &= ~NET_ADDR_RANDOM;
1122 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
1123 rcu_read_lock();
1124 list_for_each_entry_rcu(port, &team->port_list, list)
1125 if (team->ops.port_change_mac)
1126 team->ops.port_change_mac(team, port);
1127 rcu_read_unlock();
1128 return 0;
1129}
1130
1131static int team_change_mtu(struct net_device *dev, int new_mtu)
1132{
1133 struct team *team = netdev_priv(dev);
1134 struct team_port *port;
1135 int err;
1136
1137 /*
1138 * Alhough this is reader, it's guarded by team lock. It's not possible
1139 * to traverse list in reverse under rcu_read_lock
1140 */
1141 mutex_lock(&team->lock);
1142 list_for_each_entry(port, &team->port_list, list) {
1143 err = dev_set_mtu(port->dev, new_mtu);
1144 if (err) {
1145 netdev_err(dev, "Device %s failed to change mtu",
1146 port->dev->name);
1147 goto unwind;
1148 }
1149 }
1150 mutex_unlock(&team->lock);
1151
1152 dev->mtu = new_mtu;
1153
1154 return 0;
1155
1156unwind:
1157 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1158 dev_set_mtu(port->dev, dev->mtu);
1159 mutex_unlock(&team->lock);
1160
1161 return err;
1162}
1163
1164static struct rtnl_link_stats64 *
1165team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1166{
1167 struct team *team = netdev_priv(dev);
1168 struct team_pcpu_stats *p;
1169 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1170 u32 rx_dropped = 0, tx_dropped = 0;
1171 unsigned int start;
1172 int i;
1173
1174 for_each_possible_cpu(i) {
1175 p = per_cpu_ptr(team->pcpu_stats, i);
1176 do {
1177 start = u64_stats_fetch_begin_bh(&p->syncp);
1178 rx_packets = p->rx_packets;
1179 rx_bytes = p->rx_bytes;
1180 rx_multicast = p->rx_multicast;
1181 tx_packets = p->tx_packets;
1182 tx_bytes = p->tx_bytes;
1183 } while (u64_stats_fetch_retry_bh(&p->syncp, start));
1184
1185 stats->rx_packets += rx_packets;
1186 stats->rx_bytes += rx_bytes;
1187 stats->multicast += rx_multicast;
1188 stats->tx_packets += tx_packets;
1189 stats->tx_bytes += tx_bytes;
1190 /*
1191 * rx_dropped & tx_dropped are u32, updated
1192 * without syncp protection.
1193 */
1194 rx_dropped += p->rx_dropped;
1195 tx_dropped += p->tx_dropped;
1196 }
1197 stats->rx_dropped = rx_dropped;
1198 stats->tx_dropped = tx_dropped;
1199 return stats;
1200}
1201
1202static int team_vlan_rx_add_vid(struct net_device *dev, uint16_t vid)
1203{
1204 struct team *team = netdev_priv(dev);
1205 struct team_port *port;
1206 int err;
1207
1208 /*
1209 * Alhough this is reader, it's guarded by team lock. It's not possible
1210 * to traverse list in reverse under rcu_read_lock
1211 */
1212 mutex_lock(&team->lock);
1213 list_for_each_entry(port, &team->port_list, list) {
1214 err = vlan_vid_add(port->dev, vid);
1215 if (err)
1216 goto unwind;
1217 }
1218 mutex_unlock(&team->lock);
1219
1220 return 0;
1221
1222unwind:
1223 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1224 vlan_vid_del(port->dev, vid);
1225 mutex_unlock(&team->lock);
1226
1227 return err;
1228}
1229
1230static int team_vlan_rx_kill_vid(struct net_device *dev, uint16_t vid)
1231{
1232 struct team *team = netdev_priv(dev);
1233 struct team_port *port;
1234
1235 rcu_read_lock();
1236 list_for_each_entry_rcu(port, &team->port_list, list)
1237 vlan_vid_del(port->dev, vid);
1238 rcu_read_unlock();
1239
1240 return 0;
1241}
1242
1243static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
1244{
1245 struct team *team = netdev_priv(dev);
1246 int err;
1247
1248 mutex_lock(&team->lock);
1249 err = team_port_add(team, port_dev);
1250 mutex_unlock(&team->lock);
1251 return err;
1252}
1253
1254static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1255{
1256 struct team *team = netdev_priv(dev);
1257 int err;
1258
1259 mutex_lock(&team->lock);
1260 err = team_port_del(team, port_dev);
1261 mutex_unlock(&team->lock);
1262 return err;
1263}
1264
1265static netdev_features_t team_fix_features(struct net_device *dev,
1266 netdev_features_t features)
1267{
1268 struct team_port *port;
1269 struct team *team = netdev_priv(dev);
1270 netdev_features_t mask;
1271
1272 mask = features;
1273 features &= ~NETIF_F_ONE_FOR_ALL;
1274 features |= NETIF_F_ALL_FOR_ALL;
1275
1276 rcu_read_lock();
1277 list_for_each_entry_rcu(port, &team->port_list, list) {
1278 features = netdev_increment_features(features,
1279 port->dev->features,
1280 mask);
1281 }
1282 rcu_read_unlock();
1283 return features;
1284}
1285
1286static const struct net_device_ops team_netdev_ops = {
1287 .ndo_init = team_init,
1288 .ndo_uninit = team_uninit,
1289 .ndo_open = team_open,
1290 .ndo_stop = team_close,
1291 .ndo_start_xmit = team_xmit,
1292 .ndo_change_rx_flags = team_change_rx_flags,
1293 .ndo_set_rx_mode = team_set_rx_mode,
1294 .ndo_set_mac_address = team_set_mac_address,
1295 .ndo_change_mtu = team_change_mtu,
1296 .ndo_get_stats64 = team_get_stats64,
1297 .ndo_vlan_rx_add_vid = team_vlan_rx_add_vid,
1298 .ndo_vlan_rx_kill_vid = team_vlan_rx_kill_vid,
1299 .ndo_add_slave = team_add_slave,
1300 .ndo_del_slave = team_del_slave,
1301 .ndo_fix_features = team_fix_features,
1302};
1303
1304
1305/***********************
1306 * rt netlink interface
1307 ***********************/
1308
1309static void team_setup(struct net_device *dev)
1310{
1311 ether_setup(dev);
1312
1313 dev->netdev_ops = &team_netdev_ops;
1314 dev->destructor = team_destructor;
1315 dev->tx_queue_len = 0;
1316 dev->flags |= IFF_MULTICAST;
1317 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
1318
1319 /*
1320 * Indicate we support unicast address filtering. That way core won't
1321 * bring us to promisc mode in case a unicast addr is added.
1322 * Let this up to underlay drivers.
1323 */
1324 dev->priv_flags |= IFF_UNICAST_FLT;
1325
1326 dev->features |= NETIF_F_LLTX;
1327 dev->features |= NETIF_F_GRO;
1328 dev->hw_features = NETIF_F_HW_VLAN_TX |
1329 NETIF_F_HW_VLAN_RX |
1330 NETIF_F_HW_VLAN_FILTER;
1331
1332 dev->features |= dev->hw_features;
1333}
1334
1335static int team_newlink(struct net *src_net, struct net_device *dev,
1336 struct nlattr *tb[], struct nlattr *data[])
1337{
1338 int err;
1339
1340 if (tb[IFLA_ADDRESS] == NULL)
1341 eth_hw_addr_random(dev);
1342
1343 err = register_netdevice(dev);
1344 if (err)
1345 return err;
1346
1347 return 0;
1348}
1349
1350static int team_validate(struct nlattr *tb[], struct nlattr *data[])
1351{
1352 if (tb[IFLA_ADDRESS]) {
1353 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
1354 return -EINVAL;
1355 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
1356 return -EADDRNOTAVAIL;
1357 }
1358 return 0;
1359}
1360
1361static struct rtnl_link_ops team_link_ops __read_mostly = {
1362 .kind = DRV_NAME,
1363 .priv_size = sizeof(struct team),
1364 .setup = team_setup,
1365 .newlink = team_newlink,
1366 .validate = team_validate,
1367};
1368
1369
1370/***********************************
1371 * Generic netlink custom interface
1372 ***********************************/
1373
1374static struct genl_family team_nl_family = {
1375 .id = GENL_ID_GENERATE,
1376 .name = TEAM_GENL_NAME,
1377 .version = TEAM_GENL_VERSION,
1378 .maxattr = TEAM_ATTR_MAX,
1379 .netnsok = true,
1380};
1381
1382static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
1383 [TEAM_ATTR_UNSPEC] = { .type = NLA_UNSPEC, },
1384 [TEAM_ATTR_TEAM_IFINDEX] = { .type = NLA_U32 },
1385 [TEAM_ATTR_LIST_OPTION] = { .type = NLA_NESTED },
1386 [TEAM_ATTR_LIST_PORT] = { .type = NLA_NESTED },
1387};
1388
1389static const struct nla_policy
1390team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
1391 [TEAM_ATTR_OPTION_UNSPEC] = { .type = NLA_UNSPEC, },
1392 [TEAM_ATTR_OPTION_NAME] = {
1393 .type = NLA_STRING,
1394 .len = TEAM_STRING_MAX_LEN,
1395 },
1396 [TEAM_ATTR_OPTION_CHANGED] = { .type = NLA_FLAG },
1397 [TEAM_ATTR_OPTION_TYPE] = { .type = NLA_U8 },
1398 [TEAM_ATTR_OPTION_DATA] = { .type = NLA_BINARY },
1399};
1400
1401static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
1402{
1403 struct sk_buff *msg;
1404 void *hdr;
1405 int err;
1406
1407 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1408 if (!msg)
1409 return -ENOMEM;
1410
1411 hdr = genlmsg_put(msg, info->snd_pid, info->snd_seq,
1412 &team_nl_family, 0, TEAM_CMD_NOOP);
1413 if (IS_ERR(hdr)) {
1414 err = PTR_ERR(hdr);
1415 goto err_msg_put;
1416 }
1417
1418 genlmsg_end(msg, hdr);
1419
1420 return genlmsg_unicast(genl_info_net(info), msg, info->snd_pid);
1421
1422err_msg_put:
1423 nlmsg_free(msg);
1424
1425 return err;
1426}
1427
1428/*
1429 * Netlink cmd functions should be locked by following two functions.
1430 * Since dev gets held here, that ensures dev won't disappear in between.
1431 */
1432static struct team *team_nl_team_get(struct genl_info *info)
1433{
1434 struct net *net = genl_info_net(info);
1435 int ifindex;
1436 struct net_device *dev;
1437 struct team *team;
1438
1439 if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
1440 return NULL;
1441
1442 ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
1443 dev = dev_get_by_index(net, ifindex);
1444 if (!dev || dev->netdev_ops != &team_netdev_ops) {
1445 if (dev)
1446 dev_put(dev);
1447 return NULL;
1448 }
1449
1450 team = netdev_priv(dev);
1451 mutex_lock(&team->lock);
1452 return team;
1453}
1454
1455static void team_nl_team_put(struct team *team)
1456{
1457 mutex_unlock(&team->lock);
1458 dev_put(team->dev);
1459}
1460
1461static int team_nl_send_generic(struct genl_info *info, struct team *team,
1462 int (*fill_func)(struct sk_buff *skb,
1463 struct genl_info *info,
1464 int flags, struct team *team))
1465{
1466 struct sk_buff *skb;
1467 int err;
1468
1469 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1470 if (!skb)
1471 return -ENOMEM;
1472
1473 err = fill_func(skb, info, NLM_F_ACK, team);
1474 if (err < 0)
1475 goto err_fill;
1476
1477 err = genlmsg_unicast(genl_info_net(info), skb, info->snd_pid);
1478 return err;
1479
1480err_fill:
1481 nlmsg_free(skb);
1482 return err;
1483}
1484
1485static int team_nl_fill_options_get(struct sk_buff *skb,
1486 u32 pid, u32 seq, int flags,
1487 struct team *team, bool fillall)
1488{
1489 struct nlattr *option_list;
1490 void *hdr;
1491 struct team_option_inst *opt_inst;
1492 int err;
1493
1494 hdr = genlmsg_put(skb, pid, seq, &team_nl_family, flags,
1495 TEAM_CMD_OPTIONS_GET);
1496 if (IS_ERR(hdr))
1497 return PTR_ERR(hdr);
1498
1499 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
1500 goto nla_put_failure;
1501 option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
1502 if (!option_list)
1503 return -EMSGSIZE;
1504
1505 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
1506 struct nlattr *option_item;
1507 struct team_option *option = opt_inst->option;
1508 struct team_gsetter_ctx ctx;
1509
1510 /* Include only changed options if fill all mode is not on */
1511 if (!fillall && !opt_inst->changed)
1512 continue;
1513 option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
1514 if (!option_item)
1515 goto nla_put_failure;
1516 if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
1517 goto nla_put_failure;
1518 if (opt_inst->changed) {
1519 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
1520 goto nla_put_failure;
1521 opt_inst->changed = false;
1522 }
1523 if (opt_inst->removed &&
1524 nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
1525 goto nla_put_failure;
1526 if (opt_inst->port &&
1527 nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
1528 opt_inst->port->dev->ifindex))
1529 goto nla_put_failure;
1530 ctx.port = opt_inst->port;
1531 switch (option->type) {
1532 case TEAM_OPTION_TYPE_U32:
1533 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
1534 goto nla_put_failure;
1535 err = team_option_get(team, opt_inst, &ctx);
1536 if (err)
1537 goto errout;
1538 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA,
1539 ctx.data.u32_val))
1540 goto nla_put_failure;
1541 break;
1542 case TEAM_OPTION_TYPE_STRING:
1543 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
1544 goto nla_put_failure;
1545 err = team_option_get(team, opt_inst, &ctx);
1546 if (err)
1547 goto errout;
1548 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
1549 ctx.data.str_val))
1550 goto nla_put_failure;
1551 break;
1552 case TEAM_OPTION_TYPE_BINARY:
1553 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
1554 goto nla_put_failure;
1555 err = team_option_get(team, opt_inst, &ctx);
1556 if (err)
1557 goto errout;
1558 if (nla_put(skb, TEAM_ATTR_OPTION_DATA,
1559 ctx.data.bin_val.len, ctx.data.bin_val.ptr))
1560 goto nla_put_failure;
1561 break;
1562 case TEAM_OPTION_TYPE_BOOL:
1563 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
1564 goto nla_put_failure;
1565 err = team_option_get(team, opt_inst, &ctx);
1566 if (err)
1567 goto errout;
1568 if (ctx.data.bool_val &&
1569 nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
1570 goto nla_put_failure;
1571 break;
1572 default:
1573 BUG();
1574 }
1575 nla_nest_end(skb, option_item);
1576 }
1577
1578 nla_nest_end(skb, option_list);
1579 return genlmsg_end(skb, hdr);
1580
1581nla_put_failure:
1582 err = -EMSGSIZE;
1583errout:
1584 genlmsg_cancel(skb, hdr);
1585 return err;
1586}
1587
1588static int team_nl_fill_options_get_all(struct sk_buff *skb,
1589 struct genl_info *info, int flags,
1590 struct team *team)
1591{
1592 return team_nl_fill_options_get(skb, info->snd_pid,
1593 info->snd_seq, NLM_F_ACK,
1594 team, true);
1595}
1596
1597static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
1598{
1599 struct team *team;
1600 int err;
1601
1602 team = team_nl_team_get(info);
1603 if (!team)
1604 return -EINVAL;
1605
1606 err = team_nl_send_generic(info, team, team_nl_fill_options_get_all);
1607
1608 team_nl_team_put(team);
1609
1610 return err;
1611}
1612
1613static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
1614{
1615 struct team *team;
1616 int err = 0;
1617 int i;
1618 struct nlattr *nl_option;
1619
1620 team = team_nl_team_get(info);
1621 if (!team)
1622 return -EINVAL;
1623
1624 err = -EINVAL;
1625 if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
1626 err = -EINVAL;
1627 goto team_put;
1628 }
1629
1630 nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
1631 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
1632 struct nlattr *attr_port_ifindex;
1633 struct nlattr *attr_data;
1634 enum team_option_type opt_type;
1635 int opt_port_ifindex = 0; /* != 0 for per-port options */
1636 struct team_option_inst *opt_inst;
1637 char *opt_name;
1638 bool opt_found = false;
1639
1640 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
1641 err = -EINVAL;
1642 goto team_put;
1643 }
1644 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
1645 nl_option, team_nl_option_policy);
1646 if (err)
1647 goto team_put;
1648 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
1649 !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
1650 err = -EINVAL;
1651 goto team_put;
1652 }
1653 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
1654 case NLA_U32:
1655 opt_type = TEAM_OPTION_TYPE_U32;
1656 break;
1657 case NLA_STRING:
1658 opt_type = TEAM_OPTION_TYPE_STRING;
1659 break;
1660 case NLA_BINARY:
1661 opt_type = TEAM_OPTION_TYPE_BINARY;
1662 break;
1663 case NLA_FLAG:
1664 opt_type = TEAM_OPTION_TYPE_BOOL;
1665 break;
1666 default:
1667 goto team_put;
1668 }
1669
1670 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
1671 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
1672 err = -EINVAL;
1673 goto team_put;
1674 }
1675
1676 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
1677 attr_port_ifindex = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
1678 if (attr_port_ifindex)
1679 opt_port_ifindex = nla_get_u32(attr_port_ifindex);
1680
1681 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
1682 struct team_option *option = opt_inst->option;
1683 struct team_gsetter_ctx ctx;
1684 int tmp_ifindex;
1685
1686 tmp_ifindex = opt_inst->port ?
1687 opt_inst->port->dev->ifindex : 0;
1688 if (option->type != opt_type ||
1689 strcmp(option->name, opt_name) ||
1690 tmp_ifindex != opt_port_ifindex)
1691 continue;
1692 opt_found = true;
1693 ctx.port = opt_inst->port;
1694 switch (opt_type) {
1695 case TEAM_OPTION_TYPE_U32:
1696 ctx.data.u32_val = nla_get_u32(attr_data);
1697 break;
1698 case TEAM_OPTION_TYPE_STRING:
1699 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
1700 err = -EINVAL;
1701 goto team_put;
1702 }
1703 ctx.data.str_val = nla_data(attr_data);
1704 break;
1705 case TEAM_OPTION_TYPE_BINARY:
1706 ctx.data.bin_val.len = nla_len(attr_data);
1707 ctx.data.bin_val.ptr = nla_data(attr_data);
1708 break;
1709 case TEAM_OPTION_TYPE_BOOL:
1710 ctx.data.bool_val = attr_data ? true : false;
1711 break;
1712 default:
1713 BUG();
1714 }
1715 err = team_option_set(team, opt_inst, &ctx);
1716 if (err)
1717 goto team_put;
1718 }
1719 if (!opt_found) {
1720 err = -ENOENT;
1721 goto team_put;
1722 }
1723 }
1724
1725team_put:
1726 team_nl_team_put(team);
1727
1728 return err;
1729}
1730
1731static int team_nl_fill_port_list_get(struct sk_buff *skb,
1732 u32 pid, u32 seq, int flags,
1733 struct team *team,
1734 bool fillall)
1735{
1736 struct nlattr *port_list;
1737 void *hdr;
1738 struct team_port *port;
1739
1740 hdr = genlmsg_put(skb, pid, seq, &team_nl_family, flags,
1741 TEAM_CMD_PORT_LIST_GET);
1742 if (IS_ERR(hdr))
1743 return PTR_ERR(hdr);
1744
1745 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
1746 goto nla_put_failure;
1747 port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
1748 if (!port_list)
1749 return -EMSGSIZE;
1750
1751 list_for_each_entry(port, &team->port_list, list) {
1752 struct nlattr *port_item;
1753
1754 /* Include only changed ports if fill all mode is not on */
1755 if (!fillall && !port->changed)
1756 continue;
1757 port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
1758 if (!port_item)
1759 goto nla_put_failure;
1760 if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
1761 goto nla_put_failure;
1762 if (port->changed) {
1763 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
1764 goto nla_put_failure;
1765 port->changed = false;
1766 }
1767 if ((port->removed &&
1768 nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
1769 (port->state.linkup &&
1770 nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
1771 nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
1772 nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
1773 goto nla_put_failure;
1774 nla_nest_end(skb, port_item);
1775 }
1776
1777 nla_nest_end(skb, port_list);
1778 return genlmsg_end(skb, hdr);
1779
1780nla_put_failure:
1781 genlmsg_cancel(skb, hdr);
1782 return -EMSGSIZE;
1783}
1784
1785static int team_nl_fill_port_list_get_all(struct sk_buff *skb,
1786 struct genl_info *info, int flags,
1787 struct team *team)
1788{
1789 return team_nl_fill_port_list_get(skb, info->snd_pid,
1790 info->snd_seq, NLM_F_ACK,
1791 team, true);
1792}
1793
1794static int team_nl_cmd_port_list_get(struct sk_buff *skb,
1795 struct genl_info *info)
1796{
1797 struct team *team;
1798 int err;
1799
1800 team = team_nl_team_get(info);
1801 if (!team)
1802 return -EINVAL;
1803
1804 err = team_nl_send_generic(info, team, team_nl_fill_port_list_get_all);
1805
1806 team_nl_team_put(team);
1807
1808 return err;
1809}
1810
1811static struct genl_ops team_nl_ops[] = {
1812 {
1813 .cmd = TEAM_CMD_NOOP,
1814 .doit = team_nl_cmd_noop,
1815 .policy = team_nl_policy,
1816 },
1817 {
1818 .cmd = TEAM_CMD_OPTIONS_SET,
1819 .doit = team_nl_cmd_options_set,
1820 .policy = team_nl_policy,
1821 .flags = GENL_ADMIN_PERM,
1822 },
1823 {
1824 .cmd = TEAM_CMD_OPTIONS_GET,
1825 .doit = team_nl_cmd_options_get,
1826 .policy = team_nl_policy,
1827 .flags = GENL_ADMIN_PERM,
1828 },
1829 {
1830 .cmd = TEAM_CMD_PORT_LIST_GET,
1831 .doit = team_nl_cmd_port_list_get,
1832 .policy = team_nl_policy,
1833 .flags = GENL_ADMIN_PERM,
1834 },
1835};
1836
1837static struct genl_multicast_group team_change_event_mcgrp = {
1838 .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME,
1839};
1840
1841static int team_nl_send_event_options_get(struct team *team)
1842{
1843 struct sk_buff *skb;
1844 int err;
1845 struct net *net = dev_net(team->dev);
1846
1847 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1848 if (!skb)
1849 return -ENOMEM;
1850
1851 err = team_nl_fill_options_get(skb, 0, 0, 0, team, false);
1852 if (err < 0)
1853 goto err_fill;
1854
1855 err = genlmsg_multicast_netns(net, skb, 0, team_change_event_mcgrp.id,
1856 GFP_KERNEL);
1857 return err;
1858
1859err_fill:
1860 nlmsg_free(skb);
1861 return err;
1862}
1863
1864static int team_nl_send_event_port_list_get(struct team *team)
1865{
1866 struct sk_buff *skb;
1867 int err;
1868 struct net *net = dev_net(team->dev);
1869
1870 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1871 if (!skb)
1872 return -ENOMEM;
1873
1874 err = team_nl_fill_port_list_get(skb, 0, 0, 0, team, false);
1875 if (err < 0)
1876 goto err_fill;
1877
1878 err = genlmsg_multicast_netns(net, skb, 0, team_change_event_mcgrp.id,
1879 GFP_KERNEL);
1880 return err;
1881
1882err_fill:
1883 nlmsg_free(skb);
1884 return err;
1885}
1886
1887static int team_nl_init(void)
1888{
1889 int err;
1890
1891 err = genl_register_family_with_ops(&team_nl_family, team_nl_ops,
1892 ARRAY_SIZE(team_nl_ops));
1893 if (err)
1894 return err;
1895
1896 err = genl_register_mc_group(&team_nl_family, &team_change_event_mcgrp);
1897 if (err)
1898 goto err_change_event_grp_reg;
1899
1900 return 0;
1901
1902err_change_event_grp_reg:
1903 genl_unregister_family(&team_nl_family);
1904
1905 return err;
1906}
1907
1908static void team_nl_fini(void)
1909{
1910 genl_unregister_family(&team_nl_family);
1911}
1912
1913
1914/******************
1915 * Change checkers
1916 ******************/
1917
1918static void __team_options_change_check(struct team *team)
1919{
1920 int err;
1921
1922 err = team_nl_send_event_options_get(team);
1923 if (err)
1924 netdev_warn(team->dev, "Failed to send options change via netlink\n");
1925}
1926
1927/* rtnl lock is held */
1928static void __team_port_change_check(struct team_port *port, bool linkup)
1929{
1930 int err;
1931
1932 if (!port->removed && port->state.linkup == linkup)
1933 return;
1934
1935 port->changed = true;
1936 port->state.linkup = linkup;
1937 team_refresh_port_linkup(port);
1938 if (linkup) {
1939 struct ethtool_cmd ecmd;
1940
1941 err = __ethtool_get_settings(port->dev, &ecmd);
1942 if (!err) {
1943 port->state.speed = ethtool_cmd_speed(&ecmd);
1944 port->state.duplex = ecmd.duplex;
1945 goto send_event;
1946 }
1947 }
1948 port->state.speed = 0;
1949 port->state.duplex = 0;
1950
1951send_event:
1952 err = team_nl_send_event_port_list_get(port->team);
1953 if (err)
1954 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink\n",
1955 port->dev->name);
1956
1957}
1958
1959static void team_port_change_check(struct team_port *port, bool linkup)
1960{
1961 struct team *team = port->team;
1962
1963 mutex_lock(&team->lock);
1964 __team_port_change_check(port, linkup);
1965 mutex_unlock(&team->lock);
1966}
1967
1968/************************************
1969 * Net device notifier event handler
1970 ************************************/
1971
1972static int team_device_event(struct notifier_block *unused,
1973 unsigned long event, void *ptr)
1974{
1975 struct net_device *dev = (struct net_device *) ptr;
1976 struct team_port *port;
1977
1978 port = team_port_get_rtnl(dev);
1979 if (!port)
1980 return NOTIFY_DONE;
1981
1982 switch (event) {
1983 case NETDEV_UP:
1984 if (netif_carrier_ok(dev))
1985 team_port_change_check(port, true);
1986 case NETDEV_DOWN:
1987 team_port_change_check(port, false);
1988 case NETDEV_CHANGE:
1989 if (netif_running(port->dev))
1990 team_port_change_check(port,
1991 !!netif_carrier_ok(port->dev));
1992 break;
1993 case NETDEV_UNREGISTER:
1994 team_del_slave(port->team->dev, dev);
1995 break;
1996 case NETDEV_FEAT_CHANGE:
1997 team_compute_features(port->team);
1998 break;
1999 case NETDEV_CHANGEMTU:
2000 /* Forbid to change mtu of underlaying device */
2001 return NOTIFY_BAD;
2002 case NETDEV_PRE_TYPE_CHANGE:
2003 /* Forbid to change type of underlaying device */
2004 return NOTIFY_BAD;
2005 }
2006 return NOTIFY_DONE;
2007}
2008
2009static struct notifier_block team_notifier_block __read_mostly = {
2010 .notifier_call = team_device_event,
2011};
2012
2013
2014/***********************
2015 * Module init and exit
2016 ***********************/
2017
2018static int __init team_module_init(void)
2019{
2020 int err;
2021
2022 register_netdevice_notifier(&team_notifier_block);
2023
2024 err = rtnl_link_register(&team_link_ops);
2025 if (err)
2026 goto err_rtnl_reg;
2027
2028 err = team_nl_init();
2029 if (err)
2030 goto err_nl_init;
2031
2032 return 0;
2033
2034err_nl_init:
2035 rtnl_link_unregister(&team_link_ops);
2036
2037err_rtnl_reg:
2038 unregister_netdevice_notifier(&team_notifier_block);
2039
2040 return err;
2041}
2042
2043static void __exit team_module_exit(void)
2044{
2045 team_nl_fini();
2046 rtnl_link_unregister(&team_link_ops);
2047 unregister_netdevice_notifier(&team_notifier_block);
2048}
2049
2050module_init(team_module_init);
2051module_exit(team_module_exit);
2052
2053MODULE_LICENSE("GPL v2");
2054MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
2055MODULE_DESCRIPTION("Ethernet team device driver");
2056MODULE_ALIAS_RTNL_LINK(DRV_NAME);
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * drivers/net/team/team.c - Network team device driver
4 * Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com>
5 */
6
7#include <linux/ethtool.h>
8#include <linux/kernel.h>
9#include <linux/types.h>
10#include <linux/module.h>
11#include <linux/init.h>
12#include <linux/slab.h>
13#include <linux/rcupdate.h>
14#include <linux/errno.h>
15#include <linux/ctype.h>
16#include <linux/notifier.h>
17#include <linux/netdevice.h>
18#include <linux/netpoll.h>
19#include <linux/if_vlan.h>
20#include <linux/if_arp.h>
21#include <linux/socket.h>
22#include <linux/etherdevice.h>
23#include <linux/rtnetlink.h>
24#include <net/rtnetlink.h>
25#include <net/genetlink.h>
26#include <net/netlink.h>
27#include <net/sch_generic.h>
28#include <generated/utsrelease.h>
29#include <linux/if_team.h>
30
31#define DRV_NAME "team"
32
33
34/**********
35 * Helpers
36 **********/
37
38static struct team_port *team_port_get_rtnl(const struct net_device *dev)
39{
40 struct team_port *port = rtnl_dereference(dev->rx_handler_data);
41
42 return netif_is_team_port(dev) ? port : NULL;
43}
44
45/*
46 * Since the ability to change device address for open port device is tested in
47 * team_port_add, this function can be called without control of return value
48 */
49static int __set_port_dev_addr(struct net_device *port_dev,
50 const unsigned char *dev_addr)
51{
52 struct sockaddr_storage addr;
53
54 memcpy(addr.__data, dev_addr, port_dev->addr_len);
55 addr.ss_family = port_dev->type;
56 return dev_set_mac_address(port_dev, (struct sockaddr *)&addr, NULL);
57}
58
59static int team_port_set_orig_dev_addr(struct team_port *port)
60{
61 return __set_port_dev_addr(port->dev, port->orig.dev_addr);
62}
63
64static int team_port_set_team_dev_addr(struct team *team,
65 struct team_port *port)
66{
67 return __set_port_dev_addr(port->dev, team->dev->dev_addr);
68}
69
70int team_modeop_port_enter(struct team *team, struct team_port *port)
71{
72 return team_port_set_team_dev_addr(team, port);
73}
74EXPORT_SYMBOL(team_modeop_port_enter);
75
76void team_modeop_port_change_dev_addr(struct team *team,
77 struct team_port *port)
78{
79 team_port_set_team_dev_addr(team, port);
80}
81EXPORT_SYMBOL(team_modeop_port_change_dev_addr);
82
83static void team_lower_state_changed(struct team_port *port)
84{
85 struct netdev_lag_lower_state_info info;
86
87 info.link_up = port->linkup;
88 info.tx_enabled = team_port_enabled(port);
89 netdev_lower_state_changed(port->dev, &info);
90}
91
92static void team_refresh_port_linkup(struct team_port *port)
93{
94 bool new_linkup = port->user.linkup_enabled ? port->user.linkup :
95 port->state.linkup;
96
97 if (port->linkup != new_linkup) {
98 port->linkup = new_linkup;
99 team_lower_state_changed(port);
100 }
101}
102
103
104/*******************
105 * Options handling
106 *******************/
107
108struct team_option_inst { /* One for each option instance */
109 struct list_head list;
110 struct list_head tmp_list;
111 struct team_option *option;
112 struct team_option_inst_info info;
113 bool changed;
114 bool removed;
115};
116
117static struct team_option *__team_find_option(struct team *team,
118 const char *opt_name)
119{
120 struct team_option *option;
121
122 list_for_each_entry(option, &team->option_list, list) {
123 if (strcmp(option->name, opt_name) == 0)
124 return option;
125 }
126 return NULL;
127}
128
129static void __team_option_inst_del(struct team_option_inst *opt_inst)
130{
131 list_del(&opt_inst->list);
132 kfree(opt_inst);
133}
134
135static void __team_option_inst_del_option(struct team *team,
136 struct team_option *option)
137{
138 struct team_option_inst *opt_inst, *tmp;
139
140 list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
141 if (opt_inst->option == option)
142 __team_option_inst_del(opt_inst);
143 }
144}
145
146static int __team_option_inst_add(struct team *team, struct team_option *option,
147 struct team_port *port)
148{
149 struct team_option_inst *opt_inst;
150 unsigned int array_size;
151 unsigned int i;
152 int err;
153
154 array_size = option->array_size;
155 if (!array_size)
156 array_size = 1; /* No array but still need one instance */
157
158 for (i = 0; i < array_size; i++) {
159 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL);
160 if (!opt_inst)
161 return -ENOMEM;
162 opt_inst->option = option;
163 opt_inst->info.port = port;
164 opt_inst->info.array_index = i;
165 opt_inst->changed = true;
166 opt_inst->removed = false;
167 list_add_tail(&opt_inst->list, &team->option_inst_list);
168 if (option->init) {
169 err = option->init(team, &opt_inst->info);
170 if (err)
171 return err;
172 }
173
174 }
175 return 0;
176}
177
178static int __team_option_inst_add_option(struct team *team,
179 struct team_option *option)
180{
181 int err;
182
183 if (!option->per_port) {
184 err = __team_option_inst_add(team, option, NULL);
185 if (err)
186 goto inst_del_option;
187 }
188 return 0;
189
190inst_del_option:
191 __team_option_inst_del_option(team, option);
192 return err;
193}
194
195static void __team_option_inst_mark_removed_option(struct team *team,
196 struct team_option *option)
197{
198 struct team_option_inst *opt_inst;
199
200 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
201 if (opt_inst->option == option) {
202 opt_inst->changed = true;
203 opt_inst->removed = true;
204 }
205 }
206}
207
208static void __team_option_inst_del_port(struct team *team,
209 struct team_port *port)
210{
211 struct team_option_inst *opt_inst, *tmp;
212
213 list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
214 if (opt_inst->option->per_port &&
215 opt_inst->info.port == port)
216 __team_option_inst_del(opt_inst);
217 }
218}
219
220static int __team_option_inst_add_port(struct team *team,
221 struct team_port *port)
222{
223 struct team_option *option;
224 int err;
225
226 list_for_each_entry(option, &team->option_list, list) {
227 if (!option->per_port)
228 continue;
229 err = __team_option_inst_add(team, option, port);
230 if (err)
231 goto inst_del_port;
232 }
233 return 0;
234
235inst_del_port:
236 __team_option_inst_del_port(team, port);
237 return err;
238}
239
240static void __team_option_inst_mark_removed_port(struct team *team,
241 struct team_port *port)
242{
243 struct team_option_inst *opt_inst;
244
245 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
246 if (opt_inst->info.port == port) {
247 opt_inst->changed = true;
248 opt_inst->removed = true;
249 }
250 }
251}
252
253static int __team_options_register(struct team *team,
254 const struct team_option *option,
255 size_t option_count)
256{
257 int i;
258 struct team_option **dst_opts;
259 int err;
260
261 dst_opts = kcalloc(option_count, sizeof(struct team_option *),
262 GFP_KERNEL);
263 if (!dst_opts)
264 return -ENOMEM;
265 for (i = 0; i < option_count; i++, option++) {
266 if (__team_find_option(team, option->name)) {
267 err = -EEXIST;
268 goto alloc_rollback;
269 }
270 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
271 if (!dst_opts[i]) {
272 err = -ENOMEM;
273 goto alloc_rollback;
274 }
275 }
276
277 for (i = 0; i < option_count; i++) {
278 err = __team_option_inst_add_option(team, dst_opts[i]);
279 if (err)
280 goto inst_rollback;
281 list_add_tail(&dst_opts[i]->list, &team->option_list);
282 }
283
284 kfree(dst_opts);
285 return 0;
286
287inst_rollback:
288 for (i--; i >= 0; i--)
289 __team_option_inst_del_option(team, dst_opts[i]);
290
291 i = option_count;
292alloc_rollback:
293 for (i--; i >= 0; i--)
294 kfree(dst_opts[i]);
295
296 kfree(dst_opts);
297 return err;
298}
299
300static void __team_options_mark_removed(struct team *team,
301 const struct team_option *option,
302 size_t option_count)
303{
304 int i;
305
306 for (i = 0; i < option_count; i++, option++) {
307 struct team_option *del_opt;
308
309 del_opt = __team_find_option(team, option->name);
310 if (del_opt)
311 __team_option_inst_mark_removed_option(team, del_opt);
312 }
313}
314
315static void __team_options_unregister(struct team *team,
316 const struct team_option *option,
317 size_t option_count)
318{
319 int i;
320
321 for (i = 0; i < option_count; i++, option++) {
322 struct team_option *del_opt;
323
324 del_opt = __team_find_option(team, option->name);
325 if (del_opt) {
326 __team_option_inst_del_option(team, del_opt);
327 list_del(&del_opt->list);
328 kfree(del_opt);
329 }
330 }
331}
332
333static void __team_options_change_check(struct team *team);
334
335int team_options_register(struct team *team,
336 const struct team_option *option,
337 size_t option_count)
338{
339 int err;
340
341 err = __team_options_register(team, option, option_count);
342 if (err)
343 return err;
344 __team_options_change_check(team);
345 return 0;
346}
347EXPORT_SYMBOL(team_options_register);
348
349void team_options_unregister(struct team *team,
350 const struct team_option *option,
351 size_t option_count)
352{
353 __team_options_mark_removed(team, option, option_count);
354 __team_options_change_check(team);
355 __team_options_unregister(team, option, option_count);
356}
357EXPORT_SYMBOL(team_options_unregister);
358
359static int team_option_get(struct team *team,
360 struct team_option_inst *opt_inst,
361 struct team_gsetter_ctx *ctx)
362{
363 if (!opt_inst->option->getter)
364 return -EOPNOTSUPP;
365 return opt_inst->option->getter(team, ctx);
366}
367
368static int team_option_set(struct team *team,
369 struct team_option_inst *opt_inst,
370 struct team_gsetter_ctx *ctx)
371{
372 if (!opt_inst->option->setter)
373 return -EOPNOTSUPP;
374 return opt_inst->option->setter(team, ctx);
375}
376
377void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info)
378{
379 struct team_option_inst *opt_inst;
380
381 opt_inst = container_of(opt_inst_info, struct team_option_inst, info);
382 opt_inst->changed = true;
383}
384EXPORT_SYMBOL(team_option_inst_set_change);
385
386void team_options_change_check(struct team *team)
387{
388 __team_options_change_check(team);
389}
390EXPORT_SYMBOL(team_options_change_check);
391
392
393/****************
394 * Mode handling
395 ****************/
396
397static LIST_HEAD(mode_list);
398static DEFINE_SPINLOCK(mode_list_lock);
399
400struct team_mode_item {
401 struct list_head list;
402 const struct team_mode *mode;
403};
404
405static struct team_mode_item *__find_mode(const char *kind)
406{
407 struct team_mode_item *mitem;
408
409 list_for_each_entry(mitem, &mode_list, list) {
410 if (strcmp(mitem->mode->kind, kind) == 0)
411 return mitem;
412 }
413 return NULL;
414}
415
416static bool is_good_mode_name(const char *name)
417{
418 while (*name != '\0') {
419 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
420 return false;
421 name++;
422 }
423 return true;
424}
425
426int team_mode_register(const struct team_mode *mode)
427{
428 int err = 0;
429 struct team_mode_item *mitem;
430
431 if (!is_good_mode_name(mode->kind) ||
432 mode->priv_size > TEAM_MODE_PRIV_SIZE)
433 return -EINVAL;
434
435 mitem = kmalloc(sizeof(*mitem), GFP_KERNEL);
436 if (!mitem)
437 return -ENOMEM;
438
439 spin_lock(&mode_list_lock);
440 if (__find_mode(mode->kind)) {
441 err = -EEXIST;
442 kfree(mitem);
443 goto unlock;
444 }
445 mitem->mode = mode;
446 list_add_tail(&mitem->list, &mode_list);
447unlock:
448 spin_unlock(&mode_list_lock);
449 return err;
450}
451EXPORT_SYMBOL(team_mode_register);
452
453void team_mode_unregister(const struct team_mode *mode)
454{
455 struct team_mode_item *mitem;
456
457 spin_lock(&mode_list_lock);
458 mitem = __find_mode(mode->kind);
459 if (mitem) {
460 list_del_init(&mitem->list);
461 kfree(mitem);
462 }
463 spin_unlock(&mode_list_lock);
464}
465EXPORT_SYMBOL(team_mode_unregister);
466
467static const struct team_mode *team_mode_get(const char *kind)
468{
469 struct team_mode_item *mitem;
470 const struct team_mode *mode = NULL;
471
472 if (!try_module_get(THIS_MODULE))
473 return NULL;
474
475 spin_lock(&mode_list_lock);
476 mitem = __find_mode(kind);
477 if (!mitem) {
478 spin_unlock(&mode_list_lock);
479 request_module("team-mode-%s", kind);
480 spin_lock(&mode_list_lock);
481 mitem = __find_mode(kind);
482 }
483 if (mitem) {
484 mode = mitem->mode;
485 if (!try_module_get(mode->owner))
486 mode = NULL;
487 }
488
489 spin_unlock(&mode_list_lock);
490 module_put(THIS_MODULE);
491 return mode;
492}
493
494static void team_mode_put(const struct team_mode *mode)
495{
496 module_put(mode->owner);
497}
498
499static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
500{
501 dev_kfree_skb_any(skb);
502 return false;
503}
504
505static rx_handler_result_t team_dummy_receive(struct team *team,
506 struct team_port *port,
507 struct sk_buff *skb)
508{
509 return RX_HANDLER_ANOTHER;
510}
511
512static const struct team_mode __team_no_mode = {
513 .kind = "*NOMODE*",
514};
515
516static bool team_is_mode_set(struct team *team)
517{
518 return team->mode != &__team_no_mode;
519}
520
521static void team_set_no_mode(struct team *team)
522{
523 team->user_carrier_enabled = false;
524 team->mode = &__team_no_mode;
525}
526
527static void team_adjust_ops(struct team *team)
528{
529 /*
530 * To avoid checks in rx/tx skb paths, ensure here that non-null and
531 * correct ops are always set.
532 */
533
534 if (!team->en_port_count || !team_is_mode_set(team) ||
535 !team->mode->ops->transmit)
536 team->ops.transmit = team_dummy_transmit;
537 else
538 team->ops.transmit = team->mode->ops->transmit;
539
540 if (!team->en_port_count || !team_is_mode_set(team) ||
541 !team->mode->ops->receive)
542 team->ops.receive = team_dummy_receive;
543 else
544 team->ops.receive = team->mode->ops->receive;
545}
546
547/*
548 * We can benefit from the fact that it's ensured no port is present
549 * at the time of mode change. Therefore no packets are in fly so there's no
550 * need to set mode operations in any special way.
551 */
552static int __team_change_mode(struct team *team,
553 const struct team_mode *new_mode)
554{
555 /* Check if mode was previously set and do cleanup if so */
556 if (team_is_mode_set(team)) {
557 void (*exit_op)(struct team *team) = team->ops.exit;
558
559 /* Clear ops area so no callback is called any longer */
560 memset(&team->ops, 0, sizeof(struct team_mode_ops));
561 team_adjust_ops(team);
562
563 if (exit_op)
564 exit_op(team);
565 team_mode_put(team->mode);
566 team_set_no_mode(team);
567 /* zero private data area */
568 memset(&team->mode_priv, 0,
569 sizeof(struct team) - offsetof(struct team, mode_priv));
570 }
571
572 if (!new_mode)
573 return 0;
574
575 if (new_mode->ops->init) {
576 int err;
577
578 err = new_mode->ops->init(team);
579 if (err)
580 return err;
581 }
582
583 team->mode = new_mode;
584 memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
585 team_adjust_ops(team);
586
587 return 0;
588}
589
590static int team_change_mode(struct team *team, const char *kind)
591{
592 const struct team_mode *new_mode;
593 struct net_device *dev = team->dev;
594 int err;
595
596 if (!list_empty(&team->port_list)) {
597 netdev_err(dev, "No ports can be present during mode change\n");
598 return -EBUSY;
599 }
600
601 if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) {
602 netdev_err(dev, "Unable to change to the same mode the team is in\n");
603 return -EINVAL;
604 }
605
606 new_mode = team_mode_get(kind);
607 if (!new_mode) {
608 netdev_err(dev, "Mode \"%s\" not found\n", kind);
609 return -EINVAL;
610 }
611
612 err = __team_change_mode(team, new_mode);
613 if (err) {
614 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
615 team_mode_put(new_mode);
616 return err;
617 }
618
619 netdev_info(dev, "Mode changed to \"%s\"\n", kind);
620 return 0;
621}
622
623
624/*********************
625 * Peers notification
626 *********************/
627
628static void team_notify_peers_work(struct work_struct *work)
629{
630 struct team *team;
631 int val;
632
633 team = container_of(work, struct team, notify_peers.dw.work);
634
635 if (!rtnl_trylock()) {
636 schedule_delayed_work(&team->notify_peers.dw, 0);
637 return;
638 }
639 val = atomic_dec_if_positive(&team->notify_peers.count_pending);
640 if (val < 0) {
641 rtnl_unlock();
642 return;
643 }
644 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, team->dev);
645 rtnl_unlock();
646 if (val)
647 schedule_delayed_work(&team->notify_peers.dw,
648 msecs_to_jiffies(team->notify_peers.interval));
649}
650
651static void team_notify_peers(struct team *team)
652{
653 if (!team->notify_peers.count || !netif_running(team->dev))
654 return;
655 atomic_add(team->notify_peers.count, &team->notify_peers.count_pending);
656 schedule_delayed_work(&team->notify_peers.dw, 0);
657}
658
659static void team_notify_peers_init(struct team *team)
660{
661 INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work);
662}
663
664static void team_notify_peers_fini(struct team *team)
665{
666 cancel_delayed_work_sync(&team->notify_peers.dw);
667}
668
669
670/*******************************
671 * Send multicast group rejoins
672 *******************************/
673
674static void team_mcast_rejoin_work(struct work_struct *work)
675{
676 struct team *team;
677 int val;
678
679 team = container_of(work, struct team, mcast_rejoin.dw.work);
680
681 if (!rtnl_trylock()) {
682 schedule_delayed_work(&team->mcast_rejoin.dw, 0);
683 return;
684 }
685 val = atomic_dec_if_positive(&team->mcast_rejoin.count_pending);
686 if (val < 0) {
687 rtnl_unlock();
688 return;
689 }
690 call_netdevice_notifiers(NETDEV_RESEND_IGMP, team->dev);
691 rtnl_unlock();
692 if (val)
693 schedule_delayed_work(&team->mcast_rejoin.dw,
694 msecs_to_jiffies(team->mcast_rejoin.interval));
695}
696
697static void team_mcast_rejoin(struct team *team)
698{
699 if (!team->mcast_rejoin.count || !netif_running(team->dev))
700 return;
701 atomic_add(team->mcast_rejoin.count, &team->mcast_rejoin.count_pending);
702 schedule_delayed_work(&team->mcast_rejoin.dw, 0);
703}
704
705static void team_mcast_rejoin_init(struct team *team)
706{
707 INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work);
708}
709
710static void team_mcast_rejoin_fini(struct team *team)
711{
712 cancel_delayed_work_sync(&team->mcast_rejoin.dw);
713}
714
715
716/************************
717 * Rx path frame handler
718 ************************/
719
720/* note: already called with rcu_read_lock */
721static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
722{
723 struct sk_buff *skb = *pskb;
724 struct team_port *port;
725 struct team *team;
726 rx_handler_result_t res;
727
728 skb = skb_share_check(skb, GFP_ATOMIC);
729 if (!skb)
730 return RX_HANDLER_CONSUMED;
731
732 *pskb = skb;
733
734 port = team_port_get_rcu(skb->dev);
735 team = port->team;
736 if (!team_port_enabled(port)) {
737 if (is_link_local_ether_addr(eth_hdr(skb)->h_dest))
738 /* link-local packets are mostly useful when stack receives them
739 * with the link they arrive on.
740 */
741 return RX_HANDLER_PASS;
742 /* allow exact match delivery for disabled ports */
743 res = RX_HANDLER_EXACT;
744 } else {
745 res = team->ops.receive(team, port, skb);
746 }
747 if (res == RX_HANDLER_ANOTHER) {
748 struct team_pcpu_stats *pcpu_stats;
749
750 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
751 u64_stats_update_begin(&pcpu_stats->syncp);
752 u64_stats_inc(&pcpu_stats->rx_packets);
753 u64_stats_add(&pcpu_stats->rx_bytes, skb->len);
754 if (skb->pkt_type == PACKET_MULTICAST)
755 u64_stats_inc(&pcpu_stats->rx_multicast);
756 u64_stats_update_end(&pcpu_stats->syncp);
757
758 skb->dev = team->dev;
759 } else if (res == RX_HANDLER_EXACT) {
760 this_cpu_inc(team->pcpu_stats->rx_nohandler);
761 } else {
762 this_cpu_inc(team->pcpu_stats->rx_dropped);
763 }
764
765 return res;
766}
767
768
769/*************************************
770 * Multiqueue Tx port select override
771 *************************************/
772
773static int team_queue_override_init(struct team *team)
774{
775 struct list_head *listarr;
776 unsigned int queue_cnt = team->dev->num_tx_queues - 1;
777 unsigned int i;
778
779 if (!queue_cnt)
780 return 0;
781 listarr = kmalloc_array(queue_cnt, sizeof(struct list_head),
782 GFP_KERNEL);
783 if (!listarr)
784 return -ENOMEM;
785 team->qom_lists = listarr;
786 for (i = 0; i < queue_cnt; i++)
787 INIT_LIST_HEAD(listarr++);
788 return 0;
789}
790
791static void team_queue_override_fini(struct team *team)
792{
793 kfree(team->qom_lists);
794}
795
796static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
797{
798 return &team->qom_lists[queue_id - 1];
799}
800
801/*
802 * note: already called with rcu_read_lock
803 */
804static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
805{
806 struct list_head *qom_list;
807 struct team_port *port;
808
809 if (!team->queue_override_enabled || !skb->queue_mapping)
810 return false;
811 qom_list = __team_get_qom_list(team, skb->queue_mapping);
812 list_for_each_entry_rcu(port, qom_list, qom_list) {
813 if (!team_dev_queue_xmit(team, port, skb))
814 return true;
815 }
816 return false;
817}
818
819static void __team_queue_override_port_del(struct team *team,
820 struct team_port *port)
821{
822 if (!port->queue_id)
823 return;
824 list_del_rcu(&port->qom_list);
825}
826
827static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
828 struct team_port *cur)
829{
830 if (port->priority < cur->priority)
831 return true;
832 if (port->priority > cur->priority)
833 return false;
834 if (port->index < cur->index)
835 return true;
836 return false;
837}
838
839static void __team_queue_override_port_add(struct team *team,
840 struct team_port *port)
841{
842 struct team_port *cur;
843 struct list_head *qom_list;
844 struct list_head *node;
845
846 if (!port->queue_id)
847 return;
848 qom_list = __team_get_qom_list(team, port->queue_id);
849 node = qom_list;
850 list_for_each_entry(cur, qom_list, qom_list) {
851 if (team_queue_override_port_has_gt_prio_than(port, cur))
852 break;
853 node = &cur->qom_list;
854 }
855 list_add_tail_rcu(&port->qom_list, node);
856}
857
858static void __team_queue_override_enabled_check(struct team *team)
859{
860 struct team_port *port;
861 bool enabled = false;
862
863 list_for_each_entry(port, &team->port_list, list) {
864 if (port->queue_id) {
865 enabled = true;
866 break;
867 }
868 }
869 if (enabled == team->queue_override_enabled)
870 return;
871 netdev_dbg(team->dev, "%s queue override\n",
872 enabled ? "Enabling" : "Disabling");
873 team->queue_override_enabled = enabled;
874}
875
876static void team_queue_override_port_prio_changed(struct team *team,
877 struct team_port *port)
878{
879 if (!port->queue_id || team_port_enabled(port))
880 return;
881 __team_queue_override_port_del(team, port);
882 __team_queue_override_port_add(team, port);
883 __team_queue_override_enabled_check(team);
884}
885
886static void team_queue_override_port_change_queue_id(struct team *team,
887 struct team_port *port,
888 u16 new_queue_id)
889{
890 if (team_port_enabled(port)) {
891 __team_queue_override_port_del(team, port);
892 port->queue_id = new_queue_id;
893 __team_queue_override_port_add(team, port);
894 __team_queue_override_enabled_check(team);
895 } else {
896 port->queue_id = new_queue_id;
897 }
898}
899
900static void team_queue_override_port_add(struct team *team,
901 struct team_port *port)
902{
903 __team_queue_override_port_add(team, port);
904 __team_queue_override_enabled_check(team);
905}
906
907static void team_queue_override_port_del(struct team *team,
908 struct team_port *port)
909{
910 __team_queue_override_port_del(team, port);
911 __team_queue_override_enabled_check(team);
912}
913
914
915/****************
916 * Port handling
917 ****************/
918
919static bool team_port_find(const struct team *team,
920 const struct team_port *port)
921{
922 struct team_port *cur;
923
924 list_for_each_entry(cur, &team->port_list, list)
925 if (cur == port)
926 return true;
927 return false;
928}
929
930/*
931 * Enable/disable port by adding to enabled port hashlist and setting
932 * port->index (Might be racy so reader could see incorrect ifindex when
933 * processing a flying packet, but that is not a problem). Write guarded
934 * by team->lock.
935 */
936static void team_port_enable(struct team *team,
937 struct team_port *port)
938{
939 if (team_port_enabled(port))
940 return;
941 port->index = team->en_port_count++;
942 hlist_add_head_rcu(&port->hlist,
943 team_port_index_hash(team, port->index));
944 team_adjust_ops(team);
945 team_queue_override_port_add(team, port);
946 if (team->ops.port_enabled)
947 team->ops.port_enabled(team, port);
948 team_notify_peers(team);
949 team_mcast_rejoin(team);
950 team_lower_state_changed(port);
951}
952
953static void __reconstruct_port_hlist(struct team *team, int rm_index)
954{
955 int i;
956 struct team_port *port;
957
958 for (i = rm_index + 1; i < team->en_port_count; i++) {
959 port = team_get_port_by_index(team, i);
960 hlist_del_rcu(&port->hlist);
961 port->index--;
962 hlist_add_head_rcu(&port->hlist,
963 team_port_index_hash(team, port->index));
964 }
965}
966
967static void team_port_disable(struct team *team,
968 struct team_port *port)
969{
970 if (!team_port_enabled(port))
971 return;
972 if (team->ops.port_disabled)
973 team->ops.port_disabled(team, port);
974 hlist_del_rcu(&port->hlist);
975 __reconstruct_port_hlist(team, port->index);
976 port->index = -1;
977 team->en_port_count--;
978 team_queue_override_port_del(team, port);
979 team_adjust_ops(team);
980 team_lower_state_changed(port);
981}
982
983#define TEAM_VLAN_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
984 NETIF_F_FRAGLIST | NETIF_F_GSO_SOFTWARE | \
985 NETIF_F_HIGHDMA | NETIF_F_LRO)
986
987#define TEAM_ENC_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
988 NETIF_F_RXCSUM | NETIF_F_GSO_SOFTWARE)
989
990static void __team_compute_features(struct team *team)
991{
992 struct team_port *port;
993 netdev_features_t vlan_features = TEAM_VLAN_FEATURES &
994 NETIF_F_ALL_FOR_ALL;
995 netdev_features_t enc_features = TEAM_ENC_FEATURES;
996 unsigned short max_hard_header_len = ETH_HLEN;
997 unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE |
998 IFF_XMIT_DST_RELEASE_PERM;
999
1000 rcu_read_lock();
1001 list_for_each_entry_rcu(port, &team->port_list, list) {
1002 vlan_features = netdev_increment_features(vlan_features,
1003 port->dev->vlan_features,
1004 TEAM_VLAN_FEATURES);
1005 enc_features =
1006 netdev_increment_features(enc_features,
1007 port->dev->hw_enc_features,
1008 TEAM_ENC_FEATURES);
1009
1010
1011 dst_release_flag &= port->dev->priv_flags;
1012 if (port->dev->hard_header_len > max_hard_header_len)
1013 max_hard_header_len = port->dev->hard_header_len;
1014 }
1015 rcu_read_unlock();
1016
1017 team->dev->vlan_features = vlan_features;
1018 team->dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL |
1019 NETIF_F_HW_VLAN_CTAG_TX |
1020 NETIF_F_HW_VLAN_STAG_TX;
1021 team->dev->hard_header_len = max_hard_header_len;
1022
1023 team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
1024 if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
1025 team->dev->priv_flags |= IFF_XMIT_DST_RELEASE;
1026}
1027
1028static void team_compute_features(struct team *team)
1029{
1030 __team_compute_features(team);
1031 netdev_change_features(team->dev);
1032}
1033
1034static int team_port_enter(struct team *team, struct team_port *port)
1035{
1036 int err = 0;
1037
1038 dev_hold(team->dev);
1039 if (team->ops.port_enter) {
1040 err = team->ops.port_enter(team, port);
1041 if (err) {
1042 netdev_err(team->dev, "Device %s failed to enter team mode\n",
1043 port->dev->name);
1044 goto err_port_enter;
1045 }
1046 }
1047
1048 return 0;
1049
1050err_port_enter:
1051 dev_put(team->dev);
1052
1053 return err;
1054}
1055
1056static void team_port_leave(struct team *team, struct team_port *port)
1057{
1058 if (team->ops.port_leave)
1059 team->ops.port_leave(team, port);
1060 dev_put(team->dev);
1061}
1062
1063#ifdef CONFIG_NET_POLL_CONTROLLER
1064static int __team_port_enable_netpoll(struct team_port *port)
1065{
1066 struct netpoll *np;
1067 int err;
1068
1069 np = kzalloc(sizeof(*np), GFP_KERNEL);
1070 if (!np)
1071 return -ENOMEM;
1072
1073 err = __netpoll_setup(np, port->dev);
1074 if (err) {
1075 kfree(np);
1076 return err;
1077 }
1078 port->np = np;
1079 return err;
1080}
1081
1082static int team_port_enable_netpoll(struct team_port *port)
1083{
1084 if (!port->team->dev->npinfo)
1085 return 0;
1086
1087 return __team_port_enable_netpoll(port);
1088}
1089
1090static void team_port_disable_netpoll(struct team_port *port)
1091{
1092 struct netpoll *np = port->np;
1093
1094 if (!np)
1095 return;
1096 port->np = NULL;
1097
1098 __netpoll_free(np);
1099}
1100#else
1101static int team_port_enable_netpoll(struct team_port *port)
1102{
1103 return 0;
1104}
1105static void team_port_disable_netpoll(struct team_port *port)
1106{
1107}
1108#endif
1109
1110static int team_upper_dev_link(struct team *team, struct team_port *port,
1111 struct netlink_ext_ack *extack)
1112{
1113 struct netdev_lag_upper_info lag_upper_info;
1114 int err;
1115
1116 lag_upper_info.tx_type = team->mode->lag_tx_type;
1117 lag_upper_info.hash_type = NETDEV_LAG_HASH_UNKNOWN;
1118 err = netdev_master_upper_dev_link(port->dev, team->dev, NULL,
1119 &lag_upper_info, extack);
1120 if (err)
1121 return err;
1122 port->dev->priv_flags |= IFF_TEAM_PORT;
1123 return 0;
1124}
1125
1126static void team_upper_dev_unlink(struct team *team, struct team_port *port)
1127{
1128 netdev_upper_dev_unlink(port->dev, team->dev);
1129 port->dev->priv_flags &= ~IFF_TEAM_PORT;
1130}
1131
1132static void __team_port_change_port_added(struct team_port *port, bool linkup);
1133static int team_dev_type_check_change(struct net_device *dev,
1134 struct net_device *port_dev);
1135
1136static int team_port_add(struct team *team, struct net_device *port_dev,
1137 struct netlink_ext_ack *extack)
1138{
1139 struct net_device *dev = team->dev;
1140 struct team_port *port;
1141 char *portname = port_dev->name;
1142 int err;
1143
1144 if (port_dev->flags & IFF_LOOPBACK) {
1145 NL_SET_ERR_MSG(extack, "Loopback device can't be added as a team port");
1146 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1147 portname);
1148 return -EINVAL;
1149 }
1150
1151 if (netif_is_team_port(port_dev)) {
1152 NL_SET_ERR_MSG(extack, "Device is already a port of a team device");
1153 netdev_err(dev, "Device %s is already a port "
1154 "of a team device\n", portname);
1155 return -EBUSY;
1156 }
1157
1158 if (dev == port_dev) {
1159 NL_SET_ERR_MSG(extack, "Cannot enslave team device to itself");
1160 netdev_err(dev, "Cannot enslave team device to itself\n");
1161 return -EINVAL;
1162 }
1163
1164 if (netdev_has_upper_dev(dev, port_dev)) {
1165 NL_SET_ERR_MSG(extack, "Device is already an upper device of the team interface");
1166 netdev_err(dev, "Device %s is already an upper device of the team interface\n",
1167 portname);
1168 return -EBUSY;
1169 }
1170
1171 if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1172 vlan_uses_dev(dev)) {
1173 NL_SET_ERR_MSG(extack, "Device is VLAN challenged and team device has VLAN set up");
1174 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1175 portname);
1176 return -EPERM;
1177 }
1178
1179 err = team_dev_type_check_change(dev, port_dev);
1180 if (err)
1181 return err;
1182
1183 if (port_dev->flags & IFF_UP) {
1184 NL_SET_ERR_MSG(extack, "Device is up. Set it down before adding it as a team port");
1185 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1186 portname);
1187 return -EBUSY;
1188 }
1189
1190 port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1191 GFP_KERNEL);
1192 if (!port)
1193 return -ENOMEM;
1194
1195 port->dev = port_dev;
1196 port->team = team;
1197 INIT_LIST_HEAD(&port->qom_list);
1198
1199 port->orig.mtu = port_dev->mtu;
1200 err = dev_set_mtu(port_dev, dev->mtu);
1201 if (err) {
1202 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1203 goto err_set_mtu;
1204 }
1205
1206 memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1207
1208 err = team_port_enter(team, port);
1209 if (err) {
1210 netdev_err(dev, "Device %s failed to enter team mode\n",
1211 portname);
1212 goto err_port_enter;
1213 }
1214
1215 err = dev_open(port_dev, extack);
1216 if (err) {
1217 netdev_dbg(dev, "Device %s opening failed\n",
1218 portname);
1219 goto err_dev_open;
1220 }
1221
1222 err = vlan_vids_add_by_dev(port_dev, dev);
1223 if (err) {
1224 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1225 portname);
1226 goto err_vids_add;
1227 }
1228
1229 err = team_port_enable_netpoll(port);
1230 if (err) {
1231 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1232 portname);
1233 goto err_enable_netpoll;
1234 }
1235
1236 if (!(dev->features & NETIF_F_LRO))
1237 dev_disable_lro(port_dev);
1238
1239 err = netdev_rx_handler_register(port_dev, team_handle_frame,
1240 port);
1241 if (err) {
1242 netdev_err(dev, "Device %s failed to register rx_handler\n",
1243 portname);
1244 goto err_handler_register;
1245 }
1246
1247 err = team_upper_dev_link(team, port, extack);
1248 if (err) {
1249 netdev_err(dev, "Device %s failed to set upper link\n",
1250 portname);
1251 goto err_set_upper_link;
1252 }
1253
1254 err = __team_option_inst_add_port(team, port);
1255 if (err) {
1256 netdev_err(dev, "Device %s failed to add per-port options\n",
1257 portname);
1258 goto err_option_port_add;
1259 }
1260
1261 /* set promiscuity level to new slave */
1262 if (dev->flags & IFF_PROMISC) {
1263 err = dev_set_promiscuity(port_dev, 1);
1264 if (err)
1265 goto err_set_slave_promisc;
1266 }
1267
1268 /* set allmulti level to new slave */
1269 if (dev->flags & IFF_ALLMULTI) {
1270 err = dev_set_allmulti(port_dev, 1);
1271 if (err) {
1272 if (dev->flags & IFF_PROMISC)
1273 dev_set_promiscuity(port_dev, -1);
1274 goto err_set_slave_promisc;
1275 }
1276 }
1277
1278 if (dev->flags & IFF_UP) {
1279 netif_addr_lock_bh(dev);
1280 dev_uc_sync_multiple(port_dev, dev);
1281 dev_mc_sync_multiple(port_dev, dev);
1282 netif_addr_unlock_bh(dev);
1283 }
1284
1285 port->index = -1;
1286 list_add_tail_rcu(&port->list, &team->port_list);
1287 team_port_enable(team, port);
1288 __team_compute_features(team);
1289 __team_port_change_port_added(port, !!netif_oper_up(port_dev));
1290 __team_options_change_check(team);
1291
1292 netdev_info(dev, "Port device %s added\n", portname);
1293
1294 return 0;
1295
1296err_set_slave_promisc:
1297 __team_option_inst_del_port(team, port);
1298
1299err_option_port_add:
1300 team_upper_dev_unlink(team, port);
1301
1302err_set_upper_link:
1303 netdev_rx_handler_unregister(port_dev);
1304
1305err_handler_register:
1306 team_port_disable_netpoll(port);
1307
1308err_enable_netpoll:
1309 vlan_vids_del_by_dev(port_dev, dev);
1310
1311err_vids_add:
1312 dev_close(port_dev);
1313
1314err_dev_open:
1315 team_port_leave(team, port);
1316 team_port_set_orig_dev_addr(port);
1317
1318err_port_enter:
1319 dev_set_mtu(port_dev, port->orig.mtu);
1320
1321err_set_mtu:
1322 kfree(port);
1323
1324 return err;
1325}
1326
1327static void __team_port_change_port_removed(struct team_port *port);
1328
1329static int team_port_del(struct team *team, struct net_device *port_dev)
1330{
1331 struct net_device *dev = team->dev;
1332 struct team_port *port;
1333 char *portname = port_dev->name;
1334
1335 port = team_port_get_rtnl(port_dev);
1336 if (!port || !team_port_find(team, port)) {
1337 netdev_err(dev, "Device %s does not act as a port of this team\n",
1338 portname);
1339 return -ENOENT;
1340 }
1341
1342 team_port_disable(team, port);
1343 list_del_rcu(&port->list);
1344
1345 if (dev->flags & IFF_PROMISC)
1346 dev_set_promiscuity(port_dev, -1);
1347 if (dev->flags & IFF_ALLMULTI)
1348 dev_set_allmulti(port_dev, -1);
1349
1350 team_upper_dev_unlink(team, port);
1351 netdev_rx_handler_unregister(port_dev);
1352 team_port_disable_netpoll(port);
1353 vlan_vids_del_by_dev(port_dev, dev);
1354 if (dev->flags & IFF_UP) {
1355 dev_uc_unsync(port_dev, dev);
1356 dev_mc_unsync(port_dev, dev);
1357 }
1358 dev_close(port_dev);
1359 team_port_leave(team, port);
1360
1361 __team_option_inst_mark_removed_port(team, port);
1362 __team_options_change_check(team);
1363 __team_option_inst_del_port(team, port);
1364 __team_port_change_port_removed(port);
1365
1366 team_port_set_orig_dev_addr(port);
1367 dev_set_mtu(port_dev, port->orig.mtu);
1368 kfree_rcu(port, rcu);
1369 netdev_info(dev, "Port device %s removed\n", portname);
1370 __team_compute_features(team);
1371
1372 return 0;
1373}
1374
1375
1376/*****************
1377 * Net device ops
1378 *****************/
1379
1380static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1381{
1382 ctx->data.str_val = team->mode->kind;
1383 return 0;
1384}
1385
1386static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1387{
1388 return team_change_mode(team, ctx->data.str_val);
1389}
1390
1391static int team_notify_peers_count_get(struct team *team,
1392 struct team_gsetter_ctx *ctx)
1393{
1394 ctx->data.u32_val = team->notify_peers.count;
1395 return 0;
1396}
1397
1398static int team_notify_peers_count_set(struct team *team,
1399 struct team_gsetter_ctx *ctx)
1400{
1401 team->notify_peers.count = ctx->data.u32_val;
1402 return 0;
1403}
1404
1405static int team_notify_peers_interval_get(struct team *team,
1406 struct team_gsetter_ctx *ctx)
1407{
1408 ctx->data.u32_val = team->notify_peers.interval;
1409 return 0;
1410}
1411
1412static int team_notify_peers_interval_set(struct team *team,
1413 struct team_gsetter_ctx *ctx)
1414{
1415 team->notify_peers.interval = ctx->data.u32_val;
1416 return 0;
1417}
1418
1419static int team_mcast_rejoin_count_get(struct team *team,
1420 struct team_gsetter_ctx *ctx)
1421{
1422 ctx->data.u32_val = team->mcast_rejoin.count;
1423 return 0;
1424}
1425
1426static int team_mcast_rejoin_count_set(struct team *team,
1427 struct team_gsetter_ctx *ctx)
1428{
1429 team->mcast_rejoin.count = ctx->data.u32_val;
1430 return 0;
1431}
1432
1433static int team_mcast_rejoin_interval_get(struct team *team,
1434 struct team_gsetter_ctx *ctx)
1435{
1436 ctx->data.u32_val = team->mcast_rejoin.interval;
1437 return 0;
1438}
1439
1440static int team_mcast_rejoin_interval_set(struct team *team,
1441 struct team_gsetter_ctx *ctx)
1442{
1443 team->mcast_rejoin.interval = ctx->data.u32_val;
1444 return 0;
1445}
1446
1447static int team_port_en_option_get(struct team *team,
1448 struct team_gsetter_ctx *ctx)
1449{
1450 struct team_port *port = ctx->info->port;
1451
1452 ctx->data.bool_val = team_port_enabled(port);
1453 return 0;
1454}
1455
1456static int team_port_en_option_set(struct team *team,
1457 struct team_gsetter_ctx *ctx)
1458{
1459 struct team_port *port = ctx->info->port;
1460
1461 if (ctx->data.bool_val)
1462 team_port_enable(team, port);
1463 else
1464 team_port_disable(team, port);
1465 return 0;
1466}
1467
1468static int team_user_linkup_option_get(struct team *team,
1469 struct team_gsetter_ctx *ctx)
1470{
1471 struct team_port *port = ctx->info->port;
1472
1473 ctx->data.bool_val = port->user.linkup;
1474 return 0;
1475}
1476
1477static void __team_carrier_check(struct team *team);
1478
1479static int team_user_linkup_option_set(struct team *team,
1480 struct team_gsetter_ctx *ctx)
1481{
1482 struct team_port *port = ctx->info->port;
1483
1484 port->user.linkup = ctx->data.bool_val;
1485 team_refresh_port_linkup(port);
1486 __team_carrier_check(port->team);
1487 return 0;
1488}
1489
1490static int team_user_linkup_en_option_get(struct team *team,
1491 struct team_gsetter_ctx *ctx)
1492{
1493 struct team_port *port = ctx->info->port;
1494
1495 ctx->data.bool_val = port->user.linkup_enabled;
1496 return 0;
1497}
1498
1499static int team_user_linkup_en_option_set(struct team *team,
1500 struct team_gsetter_ctx *ctx)
1501{
1502 struct team_port *port = ctx->info->port;
1503
1504 port->user.linkup_enabled = ctx->data.bool_val;
1505 team_refresh_port_linkup(port);
1506 __team_carrier_check(port->team);
1507 return 0;
1508}
1509
1510static int team_priority_option_get(struct team *team,
1511 struct team_gsetter_ctx *ctx)
1512{
1513 struct team_port *port = ctx->info->port;
1514
1515 ctx->data.s32_val = port->priority;
1516 return 0;
1517}
1518
1519static int team_priority_option_set(struct team *team,
1520 struct team_gsetter_ctx *ctx)
1521{
1522 struct team_port *port = ctx->info->port;
1523 s32 priority = ctx->data.s32_val;
1524
1525 if (port->priority == priority)
1526 return 0;
1527 port->priority = priority;
1528 team_queue_override_port_prio_changed(team, port);
1529 return 0;
1530}
1531
1532static int team_queue_id_option_get(struct team *team,
1533 struct team_gsetter_ctx *ctx)
1534{
1535 struct team_port *port = ctx->info->port;
1536
1537 ctx->data.u32_val = port->queue_id;
1538 return 0;
1539}
1540
1541static int team_queue_id_option_set(struct team *team,
1542 struct team_gsetter_ctx *ctx)
1543{
1544 struct team_port *port = ctx->info->port;
1545 u16 new_queue_id = ctx->data.u32_val;
1546
1547 if (port->queue_id == new_queue_id)
1548 return 0;
1549 if (new_queue_id >= team->dev->real_num_tx_queues)
1550 return -EINVAL;
1551 team_queue_override_port_change_queue_id(team, port, new_queue_id);
1552 return 0;
1553}
1554
1555static const struct team_option team_options[] = {
1556 {
1557 .name = "mode",
1558 .type = TEAM_OPTION_TYPE_STRING,
1559 .getter = team_mode_option_get,
1560 .setter = team_mode_option_set,
1561 },
1562 {
1563 .name = "notify_peers_count",
1564 .type = TEAM_OPTION_TYPE_U32,
1565 .getter = team_notify_peers_count_get,
1566 .setter = team_notify_peers_count_set,
1567 },
1568 {
1569 .name = "notify_peers_interval",
1570 .type = TEAM_OPTION_TYPE_U32,
1571 .getter = team_notify_peers_interval_get,
1572 .setter = team_notify_peers_interval_set,
1573 },
1574 {
1575 .name = "mcast_rejoin_count",
1576 .type = TEAM_OPTION_TYPE_U32,
1577 .getter = team_mcast_rejoin_count_get,
1578 .setter = team_mcast_rejoin_count_set,
1579 },
1580 {
1581 .name = "mcast_rejoin_interval",
1582 .type = TEAM_OPTION_TYPE_U32,
1583 .getter = team_mcast_rejoin_interval_get,
1584 .setter = team_mcast_rejoin_interval_set,
1585 },
1586 {
1587 .name = "enabled",
1588 .type = TEAM_OPTION_TYPE_BOOL,
1589 .per_port = true,
1590 .getter = team_port_en_option_get,
1591 .setter = team_port_en_option_set,
1592 },
1593 {
1594 .name = "user_linkup",
1595 .type = TEAM_OPTION_TYPE_BOOL,
1596 .per_port = true,
1597 .getter = team_user_linkup_option_get,
1598 .setter = team_user_linkup_option_set,
1599 },
1600 {
1601 .name = "user_linkup_enabled",
1602 .type = TEAM_OPTION_TYPE_BOOL,
1603 .per_port = true,
1604 .getter = team_user_linkup_en_option_get,
1605 .setter = team_user_linkup_en_option_set,
1606 },
1607 {
1608 .name = "priority",
1609 .type = TEAM_OPTION_TYPE_S32,
1610 .per_port = true,
1611 .getter = team_priority_option_get,
1612 .setter = team_priority_option_set,
1613 },
1614 {
1615 .name = "queue_id",
1616 .type = TEAM_OPTION_TYPE_U32,
1617 .per_port = true,
1618 .getter = team_queue_id_option_get,
1619 .setter = team_queue_id_option_set,
1620 },
1621};
1622
1623
1624static int team_init(struct net_device *dev)
1625{
1626 struct team *team = netdev_priv(dev);
1627 int i;
1628 int err;
1629
1630 team->dev = dev;
1631 team_set_no_mode(team);
1632
1633 team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1634 if (!team->pcpu_stats)
1635 return -ENOMEM;
1636
1637 for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1638 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1639 INIT_LIST_HEAD(&team->port_list);
1640 err = team_queue_override_init(team);
1641 if (err)
1642 goto err_team_queue_override_init;
1643
1644 team_adjust_ops(team);
1645
1646 INIT_LIST_HEAD(&team->option_list);
1647 INIT_LIST_HEAD(&team->option_inst_list);
1648
1649 team_notify_peers_init(team);
1650 team_mcast_rejoin_init(team);
1651
1652 err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1653 if (err)
1654 goto err_options_register;
1655 netif_carrier_off(dev);
1656
1657 lockdep_register_key(&team->team_lock_key);
1658 __mutex_init(&team->lock, "team->team_lock_key", &team->team_lock_key);
1659 netdev_lockdep_set_classes(dev);
1660
1661 return 0;
1662
1663err_options_register:
1664 team_mcast_rejoin_fini(team);
1665 team_notify_peers_fini(team);
1666 team_queue_override_fini(team);
1667err_team_queue_override_init:
1668 free_percpu(team->pcpu_stats);
1669
1670 return err;
1671}
1672
1673static void team_uninit(struct net_device *dev)
1674{
1675 struct team *team = netdev_priv(dev);
1676 struct team_port *port;
1677 struct team_port *tmp;
1678
1679 mutex_lock(&team->lock);
1680 list_for_each_entry_safe(port, tmp, &team->port_list, list)
1681 team_port_del(team, port->dev);
1682
1683 __team_change_mode(team, NULL); /* cleanup */
1684 __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1685 team_mcast_rejoin_fini(team);
1686 team_notify_peers_fini(team);
1687 team_queue_override_fini(team);
1688 mutex_unlock(&team->lock);
1689 netdev_change_features(dev);
1690 lockdep_unregister_key(&team->team_lock_key);
1691}
1692
1693static void team_destructor(struct net_device *dev)
1694{
1695 struct team *team = netdev_priv(dev);
1696
1697 free_percpu(team->pcpu_stats);
1698}
1699
1700static int team_open(struct net_device *dev)
1701{
1702 return 0;
1703}
1704
1705static int team_close(struct net_device *dev)
1706{
1707 struct team *team = netdev_priv(dev);
1708 struct team_port *port;
1709
1710 list_for_each_entry(port, &team->port_list, list) {
1711 dev_uc_unsync(port->dev, dev);
1712 dev_mc_unsync(port->dev, dev);
1713 }
1714
1715 return 0;
1716}
1717
1718/*
1719 * note: already called with rcu_read_lock
1720 */
1721static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1722{
1723 struct team *team = netdev_priv(dev);
1724 bool tx_success;
1725 unsigned int len = skb->len;
1726
1727 tx_success = team_queue_override_transmit(team, skb);
1728 if (!tx_success)
1729 tx_success = team->ops.transmit(team, skb);
1730 if (tx_success) {
1731 struct team_pcpu_stats *pcpu_stats;
1732
1733 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1734 u64_stats_update_begin(&pcpu_stats->syncp);
1735 u64_stats_inc(&pcpu_stats->tx_packets);
1736 u64_stats_add(&pcpu_stats->tx_bytes, len);
1737 u64_stats_update_end(&pcpu_stats->syncp);
1738 } else {
1739 this_cpu_inc(team->pcpu_stats->tx_dropped);
1740 }
1741
1742 return NETDEV_TX_OK;
1743}
1744
1745static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1746 struct net_device *sb_dev)
1747{
1748 /*
1749 * This helper function exists to help dev_pick_tx get the correct
1750 * destination queue. Using a helper function skips a call to
1751 * skb_tx_hash and will put the skbs in the queue we expect on their
1752 * way down to the team driver.
1753 */
1754 u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1755
1756 /*
1757 * Save the original txq to restore before passing to the driver
1758 */
1759 qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1760
1761 if (unlikely(txq >= dev->real_num_tx_queues)) {
1762 do {
1763 txq -= dev->real_num_tx_queues;
1764 } while (txq >= dev->real_num_tx_queues);
1765 }
1766 return txq;
1767}
1768
1769static void team_change_rx_flags(struct net_device *dev, int change)
1770{
1771 struct team *team = netdev_priv(dev);
1772 struct team_port *port;
1773 int inc;
1774
1775 rcu_read_lock();
1776 list_for_each_entry_rcu(port, &team->port_list, list) {
1777 if (change & IFF_PROMISC) {
1778 inc = dev->flags & IFF_PROMISC ? 1 : -1;
1779 dev_set_promiscuity(port->dev, inc);
1780 }
1781 if (change & IFF_ALLMULTI) {
1782 inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1783 dev_set_allmulti(port->dev, inc);
1784 }
1785 }
1786 rcu_read_unlock();
1787}
1788
1789static void team_set_rx_mode(struct net_device *dev)
1790{
1791 struct team *team = netdev_priv(dev);
1792 struct team_port *port;
1793
1794 rcu_read_lock();
1795 list_for_each_entry_rcu(port, &team->port_list, list) {
1796 dev_uc_sync_multiple(port->dev, dev);
1797 dev_mc_sync_multiple(port->dev, dev);
1798 }
1799 rcu_read_unlock();
1800}
1801
1802static int team_set_mac_address(struct net_device *dev, void *p)
1803{
1804 struct sockaddr *addr = p;
1805 struct team *team = netdev_priv(dev);
1806 struct team_port *port;
1807
1808 if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1809 return -EADDRNOTAVAIL;
1810 dev_addr_set(dev, addr->sa_data);
1811 mutex_lock(&team->lock);
1812 list_for_each_entry(port, &team->port_list, list)
1813 if (team->ops.port_change_dev_addr)
1814 team->ops.port_change_dev_addr(team, port);
1815 mutex_unlock(&team->lock);
1816 return 0;
1817}
1818
1819static int team_change_mtu(struct net_device *dev, int new_mtu)
1820{
1821 struct team *team = netdev_priv(dev);
1822 struct team_port *port;
1823 int err;
1824
1825 /*
1826 * Alhough this is reader, it's guarded by team lock. It's not possible
1827 * to traverse list in reverse under rcu_read_lock
1828 */
1829 mutex_lock(&team->lock);
1830 team->port_mtu_change_allowed = true;
1831 list_for_each_entry(port, &team->port_list, list) {
1832 err = dev_set_mtu(port->dev, new_mtu);
1833 if (err) {
1834 netdev_err(dev, "Device %s failed to change mtu",
1835 port->dev->name);
1836 goto unwind;
1837 }
1838 }
1839 team->port_mtu_change_allowed = false;
1840 mutex_unlock(&team->lock);
1841
1842 dev->mtu = new_mtu;
1843
1844 return 0;
1845
1846unwind:
1847 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1848 dev_set_mtu(port->dev, dev->mtu);
1849 team->port_mtu_change_allowed = false;
1850 mutex_unlock(&team->lock);
1851
1852 return err;
1853}
1854
1855static void
1856team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1857{
1858 struct team *team = netdev_priv(dev);
1859 struct team_pcpu_stats *p;
1860 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1861 u32 rx_dropped = 0, tx_dropped = 0, rx_nohandler = 0;
1862 unsigned int start;
1863 int i;
1864
1865 for_each_possible_cpu(i) {
1866 p = per_cpu_ptr(team->pcpu_stats, i);
1867 do {
1868 start = u64_stats_fetch_begin(&p->syncp);
1869 rx_packets = u64_stats_read(&p->rx_packets);
1870 rx_bytes = u64_stats_read(&p->rx_bytes);
1871 rx_multicast = u64_stats_read(&p->rx_multicast);
1872 tx_packets = u64_stats_read(&p->tx_packets);
1873 tx_bytes = u64_stats_read(&p->tx_bytes);
1874 } while (u64_stats_fetch_retry(&p->syncp, start));
1875
1876 stats->rx_packets += rx_packets;
1877 stats->rx_bytes += rx_bytes;
1878 stats->multicast += rx_multicast;
1879 stats->tx_packets += tx_packets;
1880 stats->tx_bytes += tx_bytes;
1881 /*
1882 * rx_dropped, tx_dropped & rx_nohandler are u32,
1883 * updated without syncp protection.
1884 */
1885 rx_dropped += READ_ONCE(p->rx_dropped);
1886 tx_dropped += READ_ONCE(p->tx_dropped);
1887 rx_nohandler += READ_ONCE(p->rx_nohandler);
1888 }
1889 stats->rx_dropped = rx_dropped;
1890 stats->tx_dropped = tx_dropped;
1891 stats->rx_nohandler = rx_nohandler;
1892}
1893
1894static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1895{
1896 struct team *team = netdev_priv(dev);
1897 struct team_port *port;
1898 int err;
1899
1900 /*
1901 * Alhough this is reader, it's guarded by team lock. It's not possible
1902 * to traverse list in reverse under rcu_read_lock
1903 */
1904 mutex_lock(&team->lock);
1905 list_for_each_entry(port, &team->port_list, list) {
1906 err = vlan_vid_add(port->dev, proto, vid);
1907 if (err)
1908 goto unwind;
1909 }
1910 mutex_unlock(&team->lock);
1911
1912 return 0;
1913
1914unwind:
1915 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1916 vlan_vid_del(port->dev, proto, vid);
1917 mutex_unlock(&team->lock);
1918
1919 return err;
1920}
1921
1922static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1923{
1924 struct team *team = netdev_priv(dev);
1925 struct team_port *port;
1926
1927 mutex_lock(&team->lock);
1928 list_for_each_entry(port, &team->port_list, list)
1929 vlan_vid_del(port->dev, proto, vid);
1930 mutex_unlock(&team->lock);
1931
1932 return 0;
1933}
1934
1935#ifdef CONFIG_NET_POLL_CONTROLLER
1936static void team_poll_controller(struct net_device *dev)
1937{
1938}
1939
1940static void __team_netpoll_cleanup(struct team *team)
1941{
1942 struct team_port *port;
1943
1944 list_for_each_entry(port, &team->port_list, list)
1945 team_port_disable_netpoll(port);
1946}
1947
1948static void team_netpoll_cleanup(struct net_device *dev)
1949{
1950 struct team *team = netdev_priv(dev);
1951
1952 mutex_lock(&team->lock);
1953 __team_netpoll_cleanup(team);
1954 mutex_unlock(&team->lock);
1955}
1956
1957static int team_netpoll_setup(struct net_device *dev,
1958 struct netpoll_info *npifo)
1959{
1960 struct team *team = netdev_priv(dev);
1961 struct team_port *port;
1962 int err = 0;
1963
1964 mutex_lock(&team->lock);
1965 list_for_each_entry(port, &team->port_list, list) {
1966 err = __team_port_enable_netpoll(port);
1967 if (err) {
1968 __team_netpoll_cleanup(team);
1969 break;
1970 }
1971 }
1972 mutex_unlock(&team->lock);
1973 return err;
1974}
1975#endif
1976
1977static int team_add_slave(struct net_device *dev, struct net_device *port_dev,
1978 struct netlink_ext_ack *extack)
1979{
1980 struct team *team = netdev_priv(dev);
1981 int err;
1982
1983 mutex_lock(&team->lock);
1984 err = team_port_add(team, port_dev, extack);
1985 mutex_unlock(&team->lock);
1986
1987 if (!err)
1988 netdev_change_features(dev);
1989
1990 return err;
1991}
1992
1993static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1994{
1995 struct team *team = netdev_priv(dev);
1996 int err;
1997
1998 mutex_lock(&team->lock);
1999 err = team_port_del(team, port_dev);
2000 mutex_unlock(&team->lock);
2001
2002 if (err)
2003 return err;
2004
2005 if (netif_is_team_master(port_dev)) {
2006 lockdep_unregister_key(&team->team_lock_key);
2007 lockdep_register_key(&team->team_lock_key);
2008 lockdep_set_class(&team->lock, &team->team_lock_key);
2009 }
2010 netdev_change_features(dev);
2011
2012 return err;
2013}
2014
2015static netdev_features_t team_fix_features(struct net_device *dev,
2016 netdev_features_t features)
2017{
2018 struct team_port *port;
2019 struct team *team = netdev_priv(dev);
2020 netdev_features_t mask;
2021
2022 mask = features;
2023 features &= ~NETIF_F_ONE_FOR_ALL;
2024 features |= NETIF_F_ALL_FOR_ALL;
2025
2026 rcu_read_lock();
2027 list_for_each_entry_rcu(port, &team->port_list, list) {
2028 features = netdev_increment_features(features,
2029 port->dev->features,
2030 mask);
2031 }
2032 rcu_read_unlock();
2033
2034 features = netdev_add_tso_features(features, mask);
2035
2036 return features;
2037}
2038
2039static int team_change_carrier(struct net_device *dev, bool new_carrier)
2040{
2041 struct team *team = netdev_priv(dev);
2042
2043 team->user_carrier_enabled = true;
2044
2045 if (new_carrier)
2046 netif_carrier_on(dev);
2047 else
2048 netif_carrier_off(dev);
2049 return 0;
2050}
2051
2052static const struct net_device_ops team_netdev_ops = {
2053 .ndo_init = team_init,
2054 .ndo_uninit = team_uninit,
2055 .ndo_open = team_open,
2056 .ndo_stop = team_close,
2057 .ndo_start_xmit = team_xmit,
2058 .ndo_select_queue = team_select_queue,
2059 .ndo_change_rx_flags = team_change_rx_flags,
2060 .ndo_set_rx_mode = team_set_rx_mode,
2061 .ndo_set_mac_address = team_set_mac_address,
2062 .ndo_change_mtu = team_change_mtu,
2063 .ndo_get_stats64 = team_get_stats64,
2064 .ndo_vlan_rx_add_vid = team_vlan_rx_add_vid,
2065 .ndo_vlan_rx_kill_vid = team_vlan_rx_kill_vid,
2066#ifdef CONFIG_NET_POLL_CONTROLLER
2067 .ndo_poll_controller = team_poll_controller,
2068 .ndo_netpoll_setup = team_netpoll_setup,
2069 .ndo_netpoll_cleanup = team_netpoll_cleanup,
2070#endif
2071 .ndo_add_slave = team_add_slave,
2072 .ndo_del_slave = team_del_slave,
2073 .ndo_fix_features = team_fix_features,
2074 .ndo_change_carrier = team_change_carrier,
2075 .ndo_features_check = passthru_features_check,
2076};
2077
2078/***********************
2079 * ethtool interface
2080 ***********************/
2081
2082static void team_ethtool_get_drvinfo(struct net_device *dev,
2083 struct ethtool_drvinfo *drvinfo)
2084{
2085 strscpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
2086 strscpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2087}
2088
2089static int team_ethtool_get_link_ksettings(struct net_device *dev,
2090 struct ethtool_link_ksettings *cmd)
2091{
2092 struct team *team= netdev_priv(dev);
2093 unsigned long speed = 0;
2094 struct team_port *port;
2095
2096 cmd->base.duplex = DUPLEX_UNKNOWN;
2097 cmd->base.port = PORT_OTHER;
2098
2099 rcu_read_lock();
2100 list_for_each_entry_rcu(port, &team->port_list, list) {
2101 if (team_port_txable(port)) {
2102 if (port->state.speed != SPEED_UNKNOWN)
2103 speed += port->state.speed;
2104 if (cmd->base.duplex == DUPLEX_UNKNOWN &&
2105 port->state.duplex != DUPLEX_UNKNOWN)
2106 cmd->base.duplex = port->state.duplex;
2107 }
2108 }
2109 rcu_read_unlock();
2110
2111 cmd->base.speed = speed ? : SPEED_UNKNOWN;
2112
2113 return 0;
2114}
2115
2116static const struct ethtool_ops team_ethtool_ops = {
2117 .get_drvinfo = team_ethtool_get_drvinfo,
2118 .get_link = ethtool_op_get_link,
2119 .get_link_ksettings = team_ethtool_get_link_ksettings,
2120};
2121
2122/***********************
2123 * rt netlink interface
2124 ***********************/
2125
2126static void team_setup_by_port(struct net_device *dev,
2127 struct net_device *port_dev)
2128{
2129 dev->header_ops = port_dev->header_ops;
2130 dev->type = port_dev->type;
2131 dev->hard_header_len = port_dev->hard_header_len;
2132 dev->needed_headroom = port_dev->needed_headroom;
2133 dev->addr_len = port_dev->addr_len;
2134 dev->mtu = port_dev->mtu;
2135 memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2136 eth_hw_addr_inherit(dev, port_dev);
2137}
2138
2139static int team_dev_type_check_change(struct net_device *dev,
2140 struct net_device *port_dev)
2141{
2142 struct team *team = netdev_priv(dev);
2143 char *portname = port_dev->name;
2144 int err;
2145
2146 if (dev->type == port_dev->type)
2147 return 0;
2148 if (!list_empty(&team->port_list)) {
2149 netdev_err(dev, "Device %s is of different type\n", portname);
2150 return -EBUSY;
2151 }
2152 err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2153 err = notifier_to_errno(err);
2154 if (err) {
2155 netdev_err(dev, "Refused to change device type\n");
2156 return err;
2157 }
2158 dev_uc_flush(dev);
2159 dev_mc_flush(dev);
2160 team_setup_by_port(dev, port_dev);
2161 call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2162 return 0;
2163}
2164
2165static void team_setup(struct net_device *dev)
2166{
2167 ether_setup(dev);
2168 dev->max_mtu = ETH_MAX_MTU;
2169
2170 dev->netdev_ops = &team_netdev_ops;
2171 dev->ethtool_ops = &team_ethtool_ops;
2172 dev->needs_free_netdev = true;
2173 dev->priv_destructor = team_destructor;
2174 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2175 dev->priv_flags |= IFF_NO_QUEUE;
2176 dev->priv_flags |= IFF_TEAM;
2177
2178 /*
2179 * Indicate we support unicast address filtering. That way core won't
2180 * bring us to promisc mode in case a unicast addr is added.
2181 * Let this up to underlay drivers.
2182 */
2183 dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2184
2185 dev->features |= NETIF_F_LLTX;
2186 dev->features |= NETIF_F_GRO;
2187
2188 /* Don't allow team devices to change network namespaces. */
2189 dev->features |= NETIF_F_NETNS_LOCAL;
2190
2191 dev->hw_features = TEAM_VLAN_FEATURES |
2192 NETIF_F_HW_VLAN_CTAG_RX |
2193 NETIF_F_HW_VLAN_CTAG_FILTER;
2194
2195 dev->hw_features |= NETIF_F_GSO_ENCAP_ALL;
2196 dev->features |= dev->hw_features;
2197 dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
2198}
2199
2200static int team_newlink(struct net *src_net, struct net_device *dev,
2201 struct nlattr *tb[], struct nlattr *data[],
2202 struct netlink_ext_ack *extack)
2203{
2204 if (tb[IFLA_ADDRESS] == NULL)
2205 eth_hw_addr_random(dev);
2206
2207 return register_netdevice(dev);
2208}
2209
2210static int team_validate(struct nlattr *tb[], struct nlattr *data[],
2211 struct netlink_ext_ack *extack)
2212{
2213 if (tb[IFLA_ADDRESS]) {
2214 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2215 return -EINVAL;
2216 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2217 return -EADDRNOTAVAIL;
2218 }
2219 return 0;
2220}
2221
2222static unsigned int team_get_num_tx_queues(void)
2223{
2224 return TEAM_DEFAULT_NUM_TX_QUEUES;
2225}
2226
2227static unsigned int team_get_num_rx_queues(void)
2228{
2229 return TEAM_DEFAULT_NUM_RX_QUEUES;
2230}
2231
2232static struct rtnl_link_ops team_link_ops __read_mostly = {
2233 .kind = DRV_NAME,
2234 .priv_size = sizeof(struct team),
2235 .setup = team_setup,
2236 .newlink = team_newlink,
2237 .validate = team_validate,
2238 .get_num_tx_queues = team_get_num_tx_queues,
2239 .get_num_rx_queues = team_get_num_rx_queues,
2240};
2241
2242
2243/***********************************
2244 * Generic netlink custom interface
2245 ***********************************/
2246
2247static struct genl_family team_nl_family;
2248
2249static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2250 [TEAM_ATTR_UNSPEC] = { .type = NLA_UNSPEC, },
2251 [TEAM_ATTR_TEAM_IFINDEX] = { .type = NLA_U32 },
2252 [TEAM_ATTR_LIST_OPTION] = { .type = NLA_NESTED },
2253 [TEAM_ATTR_LIST_PORT] = { .type = NLA_NESTED },
2254};
2255
2256static const struct nla_policy
2257team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2258 [TEAM_ATTR_OPTION_UNSPEC] = { .type = NLA_UNSPEC, },
2259 [TEAM_ATTR_OPTION_NAME] = {
2260 .type = NLA_STRING,
2261 .len = TEAM_STRING_MAX_LEN,
2262 },
2263 [TEAM_ATTR_OPTION_CHANGED] = { .type = NLA_FLAG },
2264 [TEAM_ATTR_OPTION_TYPE] = { .type = NLA_U8 },
2265 [TEAM_ATTR_OPTION_DATA] = { .type = NLA_BINARY },
2266 [TEAM_ATTR_OPTION_PORT_IFINDEX] = { .type = NLA_U32 },
2267 [TEAM_ATTR_OPTION_ARRAY_INDEX] = { .type = NLA_U32 },
2268};
2269
2270static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2271{
2272 struct sk_buff *msg;
2273 void *hdr;
2274 int err;
2275
2276 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2277 if (!msg)
2278 return -ENOMEM;
2279
2280 hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2281 &team_nl_family, 0, TEAM_CMD_NOOP);
2282 if (!hdr) {
2283 err = -EMSGSIZE;
2284 goto err_msg_put;
2285 }
2286
2287 genlmsg_end(msg, hdr);
2288
2289 return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2290
2291err_msg_put:
2292 nlmsg_free(msg);
2293
2294 return err;
2295}
2296
2297/*
2298 * Netlink cmd functions should be locked by following two functions.
2299 * Since dev gets held here, that ensures dev won't disappear in between.
2300 */
2301static struct team *team_nl_team_get(struct genl_info *info)
2302{
2303 struct net *net = genl_info_net(info);
2304 int ifindex;
2305 struct net_device *dev;
2306 struct team *team;
2307
2308 if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2309 return NULL;
2310
2311 ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2312 dev = dev_get_by_index(net, ifindex);
2313 if (!dev || dev->netdev_ops != &team_netdev_ops) {
2314 if (dev)
2315 dev_put(dev);
2316 return NULL;
2317 }
2318
2319 team = netdev_priv(dev);
2320 mutex_lock(&team->lock);
2321 return team;
2322}
2323
2324static void team_nl_team_put(struct team *team)
2325{
2326 mutex_unlock(&team->lock);
2327 dev_put(team->dev);
2328}
2329
2330typedef int team_nl_send_func_t(struct sk_buff *skb,
2331 struct team *team, u32 portid);
2332
2333static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2334{
2335 return genlmsg_unicast(dev_net(team->dev), skb, portid);
2336}
2337
2338static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2339 struct team_option_inst *opt_inst)
2340{
2341 struct nlattr *option_item;
2342 struct team_option *option = opt_inst->option;
2343 struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2344 struct team_gsetter_ctx ctx;
2345 int err;
2346
2347 ctx.info = opt_inst_info;
2348 err = team_option_get(team, opt_inst, &ctx);
2349 if (err)
2350 return err;
2351
2352 option_item = nla_nest_start_noflag(skb, TEAM_ATTR_ITEM_OPTION);
2353 if (!option_item)
2354 return -EMSGSIZE;
2355
2356 if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2357 goto nest_cancel;
2358 if (opt_inst_info->port &&
2359 nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2360 opt_inst_info->port->dev->ifindex))
2361 goto nest_cancel;
2362 if (opt_inst->option->array_size &&
2363 nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2364 opt_inst_info->array_index))
2365 goto nest_cancel;
2366
2367 switch (option->type) {
2368 case TEAM_OPTION_TYPE_U32:
2369 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2370 goto nest_cancel;
2371 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2372 goto nest_cancel;
2373 break;
2374 case TEAM_OPTION_TYPE_STRING:
2375 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2376 goto nest_cancel;
2377 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2378 ctx.data.str_val))
2379 goto nest_cancel;
2380 break;
2381 case TEAM_OPTION_TYPE_BINARY:
2382 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2383 goto nest_cancel;
2384 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2385 ctx.data.bin_val.ptr))
2386 goto nest_cancel;
2387 break;
2388 case TEAM_OPTION_TYPE_BOOL:
2389 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2390 goto nest_cancel;
2391 if (ctx.data.bool_val &&
2392 nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2393 goto nest_cancel;
2394 break;
2395 case TEAM_OPTION_TYPE_S32:
2396 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2397 goto nest_cancel;
2398 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2399 goto nest_cancel;
2400 break;
2401 default:
2402 BUG();
2403 }
2404 if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2405 goto nest_cancel;
2406 if (opt_inst->changed) {
2407 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2408 goto nest_cancel;
2409 opt_inst->changed = false;
2410 }
2411 nla_nest_end(skb, option_item);
2412 return 0;
2413
2414nest_cancel:
2415 nla_nest_cancel(skb, option_item);
2416 return -EMSGSIZE;
2417}
2418
2419static int __send_and_alloc_skb(struct sk_buff **pskb,
2420 struct team *team, u32 portid,
2421 team_nl_send_func_t *send_func)
2422{
2423 int err;
2424
2425 if (*pskb) {
2426 err = send_func(*pskb, team, portid);
2427 if (err)
2428 return err;
2429 }
2430 *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2431 if (!*pskb)
2432 return -ENOMEM;
2433 return 0;
2434}
2435
2436static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2437 int flags, team_nl_send_func_t *send_func,
2438 struct list_head *sel_opt_inst_list)
2439{
2440 struct nlattr *option_list;
2441 struct nlmsghdr *nlh;
2442 void *hdr;
2443 struct team_option_inst *opt_inst;
2444 int err;
2445 struct sk_buff *skb = NULL;
2446 bool incomplete;
2447 int i;
2448
2449 opt_inst = list_first_entry(sel_opt_inst_list,
2450 struct team_option_inst, tmp_list);
2451
2452start_again:
2453 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2454 if (err)
2455 return err;
2456
2457 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2458 TEAM_CMD_OPTIONS_GET);
2459 if (!hdr) {
2460 nlmsg_free(skb);
2461 return -EMSGSIZE;
2462 }
2463
2464 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2465 goto nla_put_failure;
2466 option_list = nla_nest_start_noflag(skb, TEAM_ATTR_LIST_OPTION);
2467 if (!option_list)
2468 goto nla_put_failure;
2469
2470 i = 0;
2471 incomplete = false;
2472 list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2473 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2474 if (err) {
2475 if (err == -EMSGSIZE) {
2476 if (!i)
2477 goto errout;
2478 incomplete = true;
2479 break;
2480 }
2481 goto errout;
2482 }
2483 i++;
2484 }
2485
2486 nla_nest_end(skb, option_list);
2487 genlmsg_end(skb, hdr);
2488 if (incomplete)
2489 goto start_again;
2490
2491send_done:
2492 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2493 if (!nlh) {
2494 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2495 if (err)
2496 return err;
2497 goto send_done;
2498 }
2499
2500 return send_func(skb, team, portid);
2501
2502nla_put_failure:
2503 err = -EMSGSIZE;
2504errout:
2505 nlmsg_free(skb);
2506 return err;
2507}
2508
2509static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2510{
2511 struct team *team;
2512 struct team_option_inst *opt_inst;
2513 int err;
2514 LIST_HEAD(sel_opt_inst_list);
2515
2516 team = team_nl_team_get(info);
2517 if (!team)
2518 return -EINVAL;
2519
2520 list_for_each_entry(opt_inst, &team->option_inst_list, list)
2521 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2522 err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2523 NLM_F_ACK, team_nl_send_unicast,
2524 &sel_opt_inst_list);
2525
2526 team_nl_team_put(team);
2527
2528 return err;
2529}
2530
2531static int team_nl_send_event_options_get(struct team *team,
2532 struct list_head *sel_opt_inst_list);
2533
2534static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2535{
2536 struct team *team;
2537 int err = 0;
2538 int i;
2539 struct nlattr *nl_option;
2540
2541 rtnl_lock();
2542
2543 team = team_nl_team_get(info);
2544 if (!team) {
2545 err = -EINVAL;
2546 goto rtnl_unlock;
2547 }
2548
2549 err = -EINVAL;
2550 if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2551 err = -EINVAL;
2552 goto team_put;
2553 }
2554
2555 nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2556 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2557 struct nlattr *attr;
2558 struct nlattr *attr_data;
2559 LIST_HEAD(opt_inst_list);
2560 enum team_option_type opt_type;
2561 int opt_port_ifindex = 0; /* != 0 for per-port options */
2562 u32 opt_array_index = 0;
2563 bool opt_is_array = false;
2564 struct team_option_inst *opt_inst;
2565 char *opt_name;
2566 bool opt_found = false;
2567
2568 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2569 err = -EINVAL;
2570 goto team_put;
2571 }
2572 err = nla_parse_nested_deprecated(opt_attrs,
2573 TEAM_ATTR_OPTION_MAX,
2574 nl_option,
2575 team_nl_option_policy,
2576 info->extack);
2577 if (err)
2578 goto team_put;
2579 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2580 !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2581 err = -EINVAL;
2582 goto team_put;
2583 }
2584 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2585 case NLA_U32:
2586 opt_type = TEAM_OPTION_TYPE_U32;
2587 break;
2588 case NLA_STRING:
2589 opt_type = TEAM_OPTION_TYPE_STRING;
2590 break;
2591 case NLA_BINARY:
2592 opt_type = TEAM_OPTION_TYPE_BINARY;
2593 break;
2594 case NLA_FLAG:
2595 opt_type = TEAM_OPTION_TYPE_BOOL;
2596 break;
2597 case NLA_S32:
2598 opt_type = TEAM_OPTION_TYPE_S32;
2599 break;
2600 default:
2601 goto team_put;
2602 }
2603
2604 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2605 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2606 err = -EINVAL;
2607 goto team_put;
2608 }
2609
2610 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2611 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2612 if (attr)
2613 opt_port_ifindex = nla_get_u32(attr);
2614
2615 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2616 if (attr) {
2617 opt_is_array = true;
2618 opt_array_index = nla_get_u32(attr);
2619 }
2620
2621 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2622 struct team_option *option = opt_inst->option;
2623 struct team_gsetter_ctx ctx;
2624 struct team_option_inst_info *opt_inst_info;
2625 int tmp_ifindex;
2626
2627 opt_inst_info = &opt_inst->info;
2628 tmp_ifindex = opt_inst_info->port ?
2629 opt_inst_info->port->dev->ifindex : 0;
2630 if (option->type != opt_type ||
2631 strcmp(option->name, opt_name) ||
2632 tmp_ifindex != opt_port_ifindex ||
2633 (option->array_size && !opt_is_array) ||
2634 opt_inst_info->array_index != opt_array_index)
2635 continue;
2636 opt_found = true;
2637 ctx.info = opt_inst_info;
2638 switch (opt_type) {
2639 case TEAM_OPTION_TYPE_U32:
2640 ctx.data.u32_val = nla_get_u32(attr_data);
2641 break;
2642 case TEAM_OPTION_TYPE_STRING:
2643 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2644 err = -EINVAL;
2645 goto team_put;
2646 }
2647 ctx.data.str_val = nla_data(attr_data);
2648 break;
2649 case TEAM_OPTION_TYPE_BINARY:
2650 ctx.data.bin_val.len = nla_len(attr_data);
2651 ctx.data.bin_val.ptr = nla_data(attr_data);
2652 break;
2653 case TEAM_OPTION_TYPE_BOOL:
2654 ctx.data.bool_val = attr_data ? true : false;
2655 break;
2656 case TEAM_OPTION_TYPE_S32:
2657 ctx.data.s32_val = nla_get_s32(attr_data);
2658 break;
2659 default:
2660 BUG();
2661 }
2662 err = team_option_set(team, opt_inst, &ctx);
2663 if (err)
2664 goto team_put;
2665 opt_inst->changed = true;
2666 list_add(&opt_inst->tmp_list, &opt_inst_list);
2667 }
2668 if (!opt_found) {
2669 err = -ENOENT;
2670 goto team_put;
2671 }
2672
2673 err = team_nl_send_event_options_get(team, &opt_inst_list);
2674 if (err)
2675 break;
2676 }
2677
2678team_put:
2679 team_nl_team_put(team);
2680rtnl_unlock:
2681 rtnl_unlock();
2682 return err;
2683}
2684
2685static int team_nl_fill_one_port_get(struct sk_buff *skb,
2686 struct team_port *port)
2687{
2688 struct nlattr *port_item;
2689
2690 port_item = nla_nest_start_noflag(skb, TEAM_ATTR_ITEM_PORT);
2691 if (!port_item)
2692 goto nest_cancel;
2693 if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2694 goto nest_cancel;
2695 if (port->changed) {
2696 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2697 goto nest_cancel;
2698 port->changed = false;
2699 }
2700 if ((port->removed &&
2701 nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2702 (port->state.linkup &&
2703 nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2704 nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2705 nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2706 goto nest_cancel;
2707 nla_nest_end(skb, port_item);
2708 return 0;
2709
2710nest_cancel:
2711 nla_nest_cancel(skb, port_item);
2712 return -EMSGSIZE;
2713}
2714
2715static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2716 int flags, team_nl_send_func_t *send_func,
2717 struct team_port *one_port)
2718{
2719 struct nlattr *port_list;
2720 struct nlmsghdr *nlh;
2721 void *hdr;
2722 struct team_port *port;
2723 int err;
2724 struct sk_buff *skb = NULL;
2725 bool incomplete;
2726 int i;
2727
2728 port = list_first_entry_or_null(&team->port_list,
2729 struct team_port, list);
2730
2731start_again:
2732 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2733 if (err)
2734 return err;
2735
2736 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2737 TEAM_CMD_PORT_LIST_GET);
2738 if (!hdr) {
2739 nlmsg_free(skb);
2740 return -EMSGSIZE;
2741 }
2742
2743 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2744 goto nla_put_failure;
2745 port_list = nla_nest_start_noflag(skb, TEAM_ATTR_LIST_PORT);
2746 if (!port_list)
2747 goto nla_put_failure;
2748
2749 i = 0;
2750 incomplete = false;
2751
2752 /* If one port is selected, called wants to send port list containing
2753 * only this port. Otherwise go through all listed ports and send all
2754 */
2755 if (one_port) {
2756 err = team_nl_fill_one_port_get(skb, one_port);
2757 if (err)
2758 goto errout;
2759 } else if (port) {
2760 list_for_each_entry_from(port, &team->port_list, list) {
2761 err = team_nl_fill_one_port_get(skb, port);
2762 if (err) {
2763 if (err == -EMSGSIZE) {
2764 if (!i)
2765 goto errout;
2766 incomplete = true;
2767 break;
2768 }
2769 goto errout;
2770 }
2771 i++;
2772 }
2773 }
2774
2775 nla_nest_end(skb, port_list);
2776 genlmsg_end(skb, hdr);
2777 if (incomplete)
2778 goto start_again;
2779
2780send_done:
2781 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2782 if (!nlh) {
2783 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2784 if (err)
2785 return err;
2786 goto send_done;
2787 }
2788
2789 return send_func(skb, team, portid);
2790
2791nla_put_failure:
2792 err = -EMSGSIZE;
2793errout:
2794 nlmsg_free(skb);
2795 return err;
2796}
2797
2798static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2799 struct genl_info *info)
2800{
2801 struct team *team;
2802 int err;
2803
2804 team = team_nl_team_get(info);
2805 if (!team)
2806 return -EINVAL;
2807
2808 err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2809 NLM_F_ACK, team_nl_send_unicast, NULL);
2810
2811 team_nl_team_put(team);
2812
2813 return err;
2814}
2815
2816static const struct genl_small_ops team_nl_ops[] = {
2817 {
2818 .cmd = TEAM_CMD_NOOP,
2819 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2820 .doit = team_nl_cmd_noop,
2821 },
2822 {
2823 .cmd = TEAM_CMD_OPTIONS_SET,
2824 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2825 .doit = team_nl_cmd_options_set,
2826 .flags = GENL_ADMIN_PERM,
2827 },
2828 {
2829 .cmd = TEAM_CMD_OPTIONS_GET,
2830 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2831 .doit = team_nl_cmd_options_get,
2832 .flags = GENL_ADMIN_PERM,
2833 },
2834 {
2835 .cmd = TEAM_CMD_PORT_LIST_GET,
2836 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2837 .doit = team_nl_cmd_port_list_get,
2838 .flags = GENL_ADMIN_PERM,
2839 },
2840};
2841
2842static const struct genl_multicast_group team_nl_mcgrps[] = {
2843 { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2844};
2845
2846static struct genl_family team_nl_family __ro_after_init = {
2847 .name = TEAM_GENL_NAME,
2848 .version = TEAM_GENL_VERSION,
2849 .maxattr = TEAM_ATTR_MAX,
2850 .policy = team_nl_policy,
2851 .netnsok = true,
2852 .module = THIS_MODULE,
2853 .small_ops = team_nl_ops,
2854 .n_small_ops = ARRAY_SIZE(team_nl_ops),
2855 .resv_start_op = TEAM_CMD_PORT_LIST_GET + 1,
2856 .mcgrps = team_nl_mcgrps,
2857 .n_mcgrps = ARRAY_SIZE(team_nl_mcgrps),
2858};
2859
2860static int team_nl_send_multicast(struct sk_buff *skb,
2861 struct team *team, u32 portid)
2862{
2863 return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2864 skb, 0, 0, GFP_KERNEL);
2865}
2866
2867static int team_nl_send_event_options_get(struct team *team,
2868 struct list_head *sel_opt_inst_list)
2869{
2870 return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2871 sel_opt_inst_list);
2872}
2873
2874static int team_nl_send_event_port_get(struct team *team,
2875 struct team_port *port)
2876{
2877 return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2878 port);
2879}
2880
2881static int __init team_nl_init(void)
2882{
2883 return genl_register_family(&team_nl_family);
2884}
2885
2886static void team_nl_fini(void)
2887{
2888 genl_unregister_family(&team_nl_family);
2889}
2890
2891
2892/******************
2893 * Change checkers
2894 ******************/
2895
2896static void __team_options_change_check(struct team *team)
2897{
2898 int err;
2899 struct team_option_inst *opt_inst;
2900 LIST_HEAD(sel_opt_inst_list);
2901
2902 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2903 if (opt_inst->changed)
2904 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2905 }
2906 err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2907 if (err && err != -ESRCH)
2908 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2909 err);
2910}
2911
2912/* rtnl lock is held */
2913
2914static void __team_port_change_send(struct team_port *port, bool linkup)
2915{
2916 int err;
2917
2918 port->changed = true;
2919 port->state.linkup = linkup;
2920 team_refresh_port_linkup(port);
2921 if (linkup) {
2922 struct ethtool_link_ksettings ecmd;
2923
2924 err = __ethtool_get_link_ksettings(port->dev, &ecmd);
2925 if (!err) {
2926 port->state.speed = ecmd.base.speed;
2927 port->state.duplex = ecmd.base.duplex;
2928 goto send_event;
2929 }
2930 }
2931 port->state.speed = 0;
2932 port->state.duplex = 0;
2933
2934send_event:
2935 err = team_nl_send_event_port_get(port->team, port);
2936 if (err && err != -ESRCH)
2937 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2938 port->dev->name, err);
2939
2940}
2941
2942static void __team_carrier_check(struct team *team)
2943{
2944 struct team_port *port;
2945 bool team_linkup;
2946
2947 if (team->user_carrier_enabled)
2948 return;
2949
2950 team_linkup = false;
2951 list_for_each_entry(port, &team->port_list, list) {
2952 if (port->linkup) {
2953 team_linkup = true;
2954 break;
2955 }
2956 }
2957
2958 if (team_linkup)
2959 netif_carrier_on(team->dev);
2960 else
2961 netif_carrier_off(team->dev);
2962}
2963
2964static void __team_port_change_check(struct team_port *port, bool linkup)
2965{
2966 if (port->state.linkup != linkup)
2967 __team_port_change_send(port, linkup);
2968 __team_carrier_check(port->team);
2969}
2970
2971static void __team_port_change_port_added(struct team_port *port, bool linkup)
2972{
2973 __team_port_change_send(port, linkup);
2974 __team_carrier_check(port->team);
2975}
2976
2977static void __team_port_change_port_removed(struct team_port *port)
2978{
2979 port->removed = true;
2980 __team_port_change_send(port, false);
2981 __team_carrier_check(port->team);
2982}
2983
2984static void team_port_change_check(struct team_port *port, bool linkup)
2985{
2986 struct team *team = port->team;
2987
2988 mutex_lock(&team->lock);
2989 __team_port_change_check(port, linkup);
2990 mutex_unlock(&team->lock);
2991}
2992
2993
2994/************************************
2995 * Net device notifier event handler
2996 ************************************/
2997
2998static int team_device_event(struct notifier_block *unused,
2999 unsigned long event, void *ptr)
3000{
3001 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
3002 struct team_port *port;
3003
3004 port = team_port_get_rtnl(dev);
3005 if (!port)
3006 return NOTIFY_DONE;
3007
3008 switch (event) {
3009 case NETDEV_UP:
3010 if (netif_oper_up(dev))
3011 team_port_change_check(port, true);
3012 break;
3013 case NETDEV_DOWN:
3014 team_port_change_check(port, false);
3015 break;
3016 case NETDEV_CHANGE:
3017 if (netif_running(port->dev))
3018 team_port_change_check(port,
3019 !!netif_oper_up(port->dev));
3020 break;
3021 case NETDEV_UNREGISTER:
3022 team_del_slave(port->team->dev, dev);
3023 break;
3024 case NETDEV_FEAT_CHANGE:
3025 team_compute_features(port->team);
3026 break;
3027 case NETDEV_PRECHANGEMTU:
3028 /* Forbid to change mtu of underlaying device */
3029 if (!port->team->port_mtu_change_allowed)
3030 return NOTIFY_BAD;
3031 break;
3032 case NETDEV_PRE_TYPE_CHANGE:
3033 /* Forbid to change type of underlaying device */
3034 return NOTIFY_BAD;
3035 case NETDEV_RESEND_IGMP:
3036 /* Propagate to master device */
3037 call_netdevice_notifiers(event, port->team->dev);
3038 break;
3039 }
3040 return NOTIFY_DONE;
3041}
3042
3043static struct notifier_block team_notifier_block __read_mostly = {
3044 .notifier_call = team_device_event,
3045};
3046
3047
3048/***********************
3049 * Module init and exit
3050 ***********************/
3051
3052static int __init team_module_init(void)
3053{
3054 int err;
3055
3056 register_netdevice_notifier(&team_notifier_block);
3057
3058 err = rtnl_link_register(&team_link_ops);
3059 if (err)
3060 goto err_rtnl_reg;
3061
3062 err = team_nl_init();
3063 if (err)
3064 goto err_nl_init;
3065
3066 return 0;
3067
3068err_nl_init:
3069 rtnl_link_unregister(&team_link_ops);
3070
3071err_rtnl_reg:
3072 unregister_netdevice_notifier(&team_notifier_block);
3073
3074 return err;
3075}
3076
3077static void __exit team_module_exit(void)
3078{
3079 team_nl_fini();
3080 rtnl_link_unregister(&team_link_ops);
3081 unregister_netdevice_notifier(&team_notifier_block);
3082}
3083
3084module_init(team_module_init);
3085module_exit(team_module_exit);
3086
3087MODULE_LICENSE("GPL v2");
3088MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
3089MODULE_DESCRIPTION("Ethernet team device driver");
3090MODULE_ALIAS_RTNL_LINK(DRV_NAME);