team: no need to do team_notify_peers or team_mcast_rejoin when disabling port
[sfrench/cifs-2.6.git] / drivers / net / team / team.c
1 /*
2  * drivers/net/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/netpoll.h>
22 #include <linux/if_vlan.h>
23 #include <linux/if_arp.h>
24 #include <linux/socket.h>
25 #include <linux/etherdevice.h>
26 #include <linux/rtnetlink.h>
27 #include <net/rtnetlink.h>
28 #include <net/genetlink.h>
29 #include <net/netlink.h>
30 #include <net/sch_generic.h>
31 #include <net/switchdev.h>
32 #include <generated/utsrelease.h>
33 #include <linux/if_team.h>
34
35 #define DRV_NAME "team"
36
37
38 /**********
39  * Helpers
40  **********/
41
42 #define team_port_exists(dev) (dev->priv_flags & IFF_TEAM_PORT)
43
44 static struct team_port *team_port_get_rtnl(const struct net_device *dev)
45 {
46         struct team_port *port = rtnl_dereference(dev->rx_handler_data);
47
48         return team_port_exists(dev) ? port : NULL;
49 }
50
51 /*
52  * Since the ability to change device address for open port device is tested in
53  * team_port_add, this function can be called without control of return value
54  */
55 static int __set_port_dev_addr(struct net_device *port_dev,
56                                const unsigned char *dev_addr)
57 {
58         struct sockaddr_storage addr;
59
60         memcpy(addr.__data, dev_addr, port_dev->addr_len);
61         addr.ss_family = port_dev->type;
62         return dev_set_mac_address(port_dev, (struct sockaddr *)&addr);
63 }
64
65 static int team_port_set_orig_dev_addr(struct team_port *port)
66 {
67         return __set_port_dev_addr(port->dev, port->orig.dev_addr);
68 }
69
70 static int team_port_set_team_dev_addr(struct team *team,
71                                        struct team_port *port)
72 {
73         return __set_port_dev_addr(port->dev, team->dev->dev_addr);
74 }
75
76 int team_modeop_port_enter(struct team *team, struct team_port *port)
77 {
78         return team_port_set_team_dev_addr(team, port);
79 }
80 EXPORT_SYMBOL(team_modeop_port_enter);
81
82 void team_modeop_port_change_dev_addr(struct team *team,
83                                       struct team_port *port)
84 {
85         team_port_set_team_dev_addr(team, port);
86 }
87 EXPORT_SYMBOL(team_modeop_port_change_dev_addr);
88
89 static void team_lower_state_changed(struct team_port *port)
90 {
91         struct netdev_lag_lower_state_info info;
92
93         info.link_up = port->linkup;
94         info.tx_enabled = team_port_enabled(port);
95         netdev_lower_state_changed(port->dev, &info);
96 }
97
98 static void team_refresh_port_linkup(struct team_port *port)
99 {
100         bool new_linkup = port->user.linkup_enabled ? port->user.linkup :
101                                                       port->state.linkup;
102
103         if (port->linkup != new_linkup) {
104                 port->linkup = new_linkup;
105                 team_lower_state_changed(port);
106         }
107 }
108
109
110 /*******************
111  * Options handling
112  *******************/
113
114 struct team_option_inst { /* One for each option instance */
115         struct list_head list;
116         struct list_head tmp_list;
117         struct team_option *option;
118         struct team_option_inst_info info;
119         bool changed;
120         bool removed;
121 };
122
123 static struct team_option *__team_find_option(struct team *team,
124                                               const char *opt_name)
125 {
126         struct team_option *option;
127
128         list_for_each_entry(option, &team->option_list, list) {
129                 if (strcmp(option->name, opt_name) == 0)
130                         return option;
131         }
132         return NULL;
133 }
134
135 static void __team_option_inst_del(struct team_option_inst *opt_inst)
136 {
137         list_del(&opt_inst->list);
138         kfree(opt_inst);
139 }
140
141 static void __team_option_inst_del_option(struct team *team,
142                                           struct team_option *option)
143 {
144         struct team_option_inst *opt_inst, *tmp;
145
146         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
147                 if (opt_inst->option == option)
148                         __team_option_inst_del(opt_inst);
149         }
150 }
151
152 static int __team_option_inst_add(struct team *team, struct team_option *option,
153                                   struct team_port *port)
154 {
155         struct team_option_inst *opt_inst;
156         unsigned int array_size;
157         unsigned int i;
158         int err;
159
160         array_size = option->array_size;
161         if (!array_size)
162                 array_size = 1; /* No array but still need one instance */
163
164         for (i = 0; i < array_size; i++) {
165                 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL);
166                 if (!opt_inst)
167                         return -ENOMEM;
168                 opt_inst->option = option;
169                 opt_inst->info.port = port;
170                 opt_inst->info.array_index = i;
171                 opt_inst->changed = true;
172                 opt_inst->removed = false;
173                 list_add_tail(&opt_inst->list, &team->option_inst_list);
174                 if (option->init) {
175                         err = option->init(team, &opt_inst->info);
176                         if (err)
177                                 return err;
178                 }
179
180         }
181         return 0;
182 }
183
184 static int __team_option_inst_add_option(struct team *team,
185                                          struct team_option *option)
186 {
187         int err;
188
189         if (!option->per_port) {
190                 err = __team_option_inst_add(team, option, NULL);
191                 if (err)
192                         goto inst_del_option;
193         }
194         return 0;
195
196 inst_del_option:
197         __team_option_inst_del_option(team, option);
198         return err;
199 }
200
201 static void __team_option_inst_mark_removed_option(struct team *team,
202                                                    struct team_option *option)
203 {
204         struct team_option_inst *opt_inst;
205
206         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
207                 if (opt_inst->option == option) {
208                         opt_inst->changed = true;
209                         opt_inst->removed = true;
210                 }
211         }
212 }
213
214 static void __team_option_inst_del_port(struct team *team,
215                                         struct team_port *port)
216 {
217         struct team_option_inst *opt_inst, *tmp;
218
219         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
220                 if (opt_inst->option->per_port &&
221                     opt_inst->info.port == port)
222                         __team_option_inst_del(opt_inst);
223         }
224 }
225
226 static int __team_option_inst_add_port(struct team *team,
227                                        struct team_port *port)
228 {
229         struct team_option *option;
230         int err;
231
232         list_for_each_entry(option, &team->option_list, list) {
233                 if (!option->per_port)
234                         continue;
235                 err = __team_option_inst_add(team, option, port);
236                 if (err)
237                         goto inst_del_port;
238         }
239         return 0;
240
241 inst_del_port:
242         __team_option_inst_del_port(team, port);
243         return err;
244 }
245
246 static void __team_option_inst_mark_removed_port(struct team *team,
247                                                  struct team_port *port)
248 {
249         struct team_option_inst *opt_inst;
250
251         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
252                 if (opt_inst->info.port == port) {
253                         opt_inst->changed = true;
254                         opt_inst->removed = true;
255                 }
256         }
257 }
258
259 static bool __team_option_inst_tmp_find(const struct list_head *opts,
260                                         const struct team_option_inst *needle)
261 {
262         struct team_option_inst *opt_inst;
263
264         list_for_each_entry(opt_inst, opts, tmp_list)
265                 if (opt_inst == needle)
266                         return true;
267         return false;
268 }
269
270 static int __team_options_register(struct team *team,
271                                    const struct team_option *option,
272                                    size_t option_count)
273 {
274         int i;
275         struct team_option **dst_opts;
276         int err;
277
278         dst_opts = kcalloc(option_count, sizeof(struct team_option *),
279                            GFP_KERNEL);
280         if (!dst_opts)
281                 return -ENOMEM;
282         for (i = 0; i < option_count; i++, option++) {
283                 if (__team_find_option(team, option->name)) {
284                         err = -EEXIST;
285                         goto alloc_rollback;
286                 }
287                 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
288                 if (!dst_opts[i]) {
289                         err = -ENOMEM;
290                         goto alloc_rollback;
291                 }
292         }
293
294         for (i = 0; i < option_count; i++) {
295                 err = __team_option_inst_add_option(team, dst_opts[i]);
296                 if (err)
297                         goto inst_rollback;
298                 list_add_tail(&dst_opts[i]->list, &team->option_list);
299         }
300
301         kfree(dst_opts);
302         return 0;
303
304 inst_rollback:
305         for (i--; i >= 0; i--)
306                 __team_option_inst_del_option(team, dst_opts[i]);
307
308         i = option_count - 1;
309 alloc_rollback:
310         for (i--; i >= 0; i--)
311                 kfree(dst_opts[i]);
312
313         kfree(dst_opts);
314         return err;
315 }
316
317 static void __team_options_mark_removed(struct team *team,
318                                         const struct team_option *option,
319                                         size_t option_count)
320 {
321         int i;
322
323         for (i = 0; i < option_count; i++, option++) {
324                 struct team_option *del_opt;
325
326                 del_opt = __team_find_option(team, option->name);
327                 if (del_opt)
328                         __team_option_inst_mark_removed_option(team, del_opt);
329         }
330 }
331
332 static void __team_options_unregister(struct team *team,
333                                       const struct team_option *option,
334                                       size_t option_count)
335 {
336         int i;
337
338         for (i = 0; i < option_count; i++, option++) {
339                 struct team_option *del_opt;
340
341                 del_opt = __team_find_option(team, option->name);
342                 if (del_opt) {
343                         __team_option_inst_del_option(team, del_opt);
344                         list_del(&del_opt->list);
345                         kfree(del_opt);
346                 }
347         }
348 }
349
350 static void __team_options_change_check(struct team *team);
351
352 int team_options_register(struct team *team,
353                           const struct team_option *option,
354                           size_t option_count)
355 {
356         int err;
357
358         err = __team_options_register(team, option, option_count);
359         if (err)
360                 return err;
361         __team_options_change_check(team);
362         return 0;
363 }
364 EXPORT_SYMBOL(team_options_register);
365
366 void team_options_unregister(struct team *team,
367                              const struct team_option *option,
368                              size_t option_count)
369 {
370         __team_options_mark_removed(team, option, option_count);
371         __team_options_change_check(team);
372         __team_options_unregister(team, option, option_count);
373 }
374 EXPORT_SYMBOL(team_options_unregister);
375
376 static int team_option_get(struct team *team,
377                            struct team_option_inst *opt_inst,
378                            struct team_gsetter_ctx *ctx)
379 {
380         if (!opt_inst->option->getter)
381                 return -EOPNOTSUPP;
382         return opt_inst->option->getter(team, ctx);
383 }
384
385 static int team_option_set(struct team *team,
386                            struct team_option_inst *opt_inst,
387                            struct team_gsetter_ctx *ctx)
388 {
389         if (!opt_inst->option->setter)
390                 return -EOPNOTSUPP;
391         return opt_inst->option->setter(team, ctx);
392 }
393
394 void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info)
395 {
396         struct team_option_inst *opt_inst;
397
398         opt_inst = container_of(opt_inst_info, struct team_option_inst, info);
399         opt_inst->changed = true;
400 }
401 EXPORT_SYMBOL(team_option_inst_set_change);
402
403 void team_options_change_check(struct team *team)
404 {
405         __team_options_change_check(team);
406 }
407 EXPORT_SYMBOL(team_options_change_check);
408
409
410 /****************
411  * Mode handling
412  ****************/
413
414 static LIST_HEAD(mode_list);
415 static DEFINE_SPINLOCK(mode_list_lock);
416
417 struct team_mode_item {
418         struct list_head list;
419         const struct team_mode *mode;
420 };
421
422 static struct team_mode_item *__find_mode(const char *kind)
423 {
424         struct team_mode_item *mitem;
425
426         list_for_each_entry(mitem, &mode_list, list) {
427                 if (strcmp(mitem->mode->kind, kind) == 0)
428                         return mitem;
429         }
430         return NULL;
431 }
432
433 static bool is_good_mode_name(const char *name)
434 {
435         while (*name != '\0') {
436                 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
437                         return false;
438                 name++;
439         }
440         return true;
441 }
442
443 int team_mode_register(const struct team_mode *mode)
444 {
445         int err = 0;
446         struct team_mode_item *mitem;
447
448         if (!is_good_mode_name(mode->kind) ||
449             mode->priv_size > TEAM_MODE_PRIV_SIZE)
450                 return -EINVAL;
451
452         mitem = kmalloc(sizeof(*mitem), GFP_KERNEL);
453         if (!mitem)
454                 return -ENOMEM;
455
456         spin_lock(&mode_list_lock);
457         if (__find_mode(mode->kind)) {
458                 err = -EEXIST;
459                 kfree(mitem);
460                 goto unlock;
461         }
462         mitem->mode = mode;
463         list_add_tail(&mitem->list, &mode_list);
464 unlock:
465         spin_unlock(&mode_list_lock);
466         return err;
467 }
468 EXPORT_SYMBOL(team_mode_register);
469
470 void team_mode_unregister(const struct team_mode *mode)
471 {
472         struct team_mode_item *mitem;
473
474         spin_lock(&mode_list_lock);
475         mitem = __find_mode(mode->kind);
476         if (mitem) {
477                 list_del_init(&mitem->list);
478                 kfree(mitem);
479         }
480         spin_unlock(&mode_list_lock);
481 }
482 EXPORT_SYMBOL(team_mode_unregister);
483
484 static const struct team_mode *team_mode_get(const char *kind)
485 {
486         struct team_mode_item *mitem;
487         const struct team_mode *mode = NULL;
488
489         spin_lock(&mode_list_lock);
490         mitem = __find_mode(kind);
491         if (!mitem) {
492                 spin_unlock(&mode_list_lock);
493                 request_module("team-mode-%s", kind);
494                 spin_lock(&mode_list_lock);
495                 mitem = __find_mode(kind);
496         }
497         if (mitem) {
498                 mode = mitem->mode;
499                 if (!try_module_get(mode->owner))
500                         mode = NULL;
501         }
502
503         spin_unlock(&mode_list_lock);
504         return mode;
505 }
506
507 static void team_mode_put(const struct team_mode *mode)
508 {
509         module_put(mode->owner);
510 }
511
512 static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
513 {
514         dev_kfree_skb_any(skb);
515         return false;
516 }
517
518 static rx_handler_result_t team_dummy_receive(struct team *team,
519                                               struct team_port *port,
520                                               struct sk_buff *skb)
521 {
522         return RX_HANDLER_ANOTHER;
523 }
524
525 static const struct team_mode __team_no_mode = {
526         .kind           = "*NOMODE*",
527 };
528
529 static bool team_is_mode_set(struct team *team)
530 {
531         return team->mode != &__team_no_mode;
532 }
533
534 static void team_set_no_mode(struct team *team)
535 {
536         team->user_carrier_enabled = false;
537         team->mode = &__team_no_mode;
538 }
539
540 static void team_adjust_ops(struct team *team)
541 {
542         /*
543          * To avoid checks in rx/tx skb paths, ensure here that non-null and
544          * correct ops are always set.
545          */
546
547         if (!team->en_port_count || !team_is_mode_set(team) ||
548             !team->mode->ops->transmit)
549                 team->ops.transmit = team_dummy_transmit;
550         else
551                 team->ops.transmit = team->mode->ops->transmit;
552
553         if (!team->en_port_count || !team_is_mode_set(team) ||
554             !team->mode->ops->receive)
555                 team->ops.receive = team_dummy_receive;
556         else
557                 team->ops.receive = team->mode->ops->receive;
558 }
559
560 /*
561  * We can benefit from the fact that it's ensured no port is present
562  * at the time of mode change. Therefore no packets are in fly so there's no
563  * need to set mode operations in any special way.
564  */
565 static int __team_change_mode(struct team *team,
566                               const struct team_mode *new_mode)
567 {
568         /* Check if mode was previously set and do cleanup if so */
569         if (team_is_mode_set(team)) {
570                 void (*exit_op)(struct team *team) = team->ops.exit;
571
572                 /* Clear ops area so no callback is called any longer */
573                 memset(&team->ops, 0, sizeof(struct team_mode_ops));
574                 team_adjust_ops(team);
575
576                 if (exit_op)
577                         exit_op(team);
578                 team_mode_put(team->mode);
579                 team_set_no_mode(team);
580                 /* zero private data area */
581                 memset(&team->mode_priv, 0,
582                        sizeof(struct team) - offsetof(struct team, mode_priv));
583         }
584
585         if (!new_mode)
586                 return 0;
587
588         if (new_mode->ops->init) {
589                 int err;
590
591                 err = new_mode->ops->init(team);
592                 if (err)
593                         return err;
594         }
595
596         team->mode = new_mode;
597         memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
598         team_adjust_ops(team);
599
600         return 0;
601 }
602
603 static int team_change_mode(struct team *team, const char *kind)
604 {
605         const struct team_mode *new_mode;
606         struct net_device *dev = team->dev;
607         int err;
608
609         if (!list_empty(&team->port_list)) {
610                 netdev_err(dev, "No ports can be present during mode change\n");
611                 return -EBUSY;
612         }
613
614         if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) {
615                 netdev_err(dev, "Unable to change to the same mode the team is in\n");
616                 return -EINVAL;
617         }
618
619         new_mode = team_mode_get(kind);
620         if (!new_mode) {
621                 netdev_err(dev, "Mode \"%s\" not found\n", kind);
622                 return -EINVAL;
623         }
624
625         err = __team_change_mode(team, new_mode);
626         if (err) {
627                 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
628                 team_mode_put(new_mode);
629                 return err;
630         }
631
632         netdev_info(dev, "Mode changed to \"%s\"\n", kind);
633         return 0;
634 }
635
636
637 /*********************
638  * Peers notification
639  *********************/
640
641 static void team_notify_peers_work(struct work_struct *work)
642 {
643         struct team *team;
644         int val;
645
646         team = container_of(work, struct team, notify_peers.dw.work);
647
648         if (!rtnl_trylock()) {
649                 schedule_delayed_work(&team->notify_peers.dw, 0);
650                 return;
651         }
652         val = atomic_dec_if_positive(&team->notify_peers.count_pending);
653         if (val < 0) {
654                 rtnl_unlock();
655                 return;
656         }
657         call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, team->dev);
658         rtnl_unlock();
659         if (val)
660                 schedule_delayed_work(&team->notify_peers.dw,
661                                       msecs_to_jiffies(team->notify_peers.interval));
662 }
663
664 static void team_notify_peers(struct team *team)
665 {
666         if (!team->notify_peers.count || !netif_running(team->dev))
667                 return;
668         atomic_add(team->notify_peers.count, &team->notify_peers.count_pending);
669         schedule_delayed_work(&team->notify_peers.dw, 0);
670 }
671
672 static void team_notify_peers_init(struct team *team)
673 {
674         INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work);
675 }
676
677 static void team_notify_peers_fini(struct team *team)
678 {
679         cancel_delayed_work_sync(&team->notify_peers.dw);
680 }
681
682
683 /*******************************
684  * Send multicast group rejoins
685  *******************************/
686
687 static void team_mcast_rejoin_work(struct work_struct *work)
688 {
689         struct team *team;
690         int val;
691
692         team = container_of(work, struct team, mcast_rejoin.dw.work);
693
694         if (!rtnl_trylock()) {
695                 schedule_delayed_work(&team->mcast_rejoin.dw, 0);
696                 return;
697         }
698         val = atomic_dec_if_positive(&team->mcast_rejoin.count_pending);
699         if (val < 0) {
700                 rtnl_unlock();
701                 return;
702         }
703         call_netdevice_notifiers(NETDEV_RESEND_IGMP, team->dev);
704         rtnl_unlock();
705         if (val)
706                 schedule_delayed_work(&team->mcast_rejoin.dw,
707                                       msecs_to_jiffies(team->mcast_rejoin.interval));
708 }
709
710 static void team_mcast_rejoin(struct team *team)
711 {
712         if (!team->mcast_rejoin.count || !netif_running(team->dev))
713                 return;
714         atomic_add(team->mcast_rejoin.count, &team->mcast_rejoin.count_pending);
715         schedule_delayed_work(&team->mcast_rejoin.dw, 0);
716 }
717
718 static void team_mcast_rejoin_init(struct team *team)
719 {
720         INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work);
721 }
722
723 static void team_mcast_rejoin_fini(struct team *team)
724 {
725         cancel_delayed_work_sync(&team->mcast_rejoin.dw);
726 }
727
728
729 /************************
730  * Rx path frame handler
731  ************************/
732
733 /* note: already called with rcu_read_lock */
734 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
735 {
736         struct sk_buff *skb = *pskb;
737         struct team_port *port;
738         struct team *team;
739         rx_handler_result_t res;
740
741         skb = skb_share_check(skb, GFP_ATOMIC);
742         if (!skb)
743                 return RX_HANDLER_CONSUMED;
744
745         *pskb = skb;
746
747         port = team_port_get_rcu(skb->dev);
748         team = port->team;
749         if (!team_port_enabled(port)) {
750                 /* allow exact match delivery for disabled ports */
751                 res = RX_HANDLER_EXACT;
752         } else {
753                 res = team->ops.receive(team, port, skb);
754         }
755         if (res == RX_HANDLER_ANOTHER) {
756                 struct team_pcpu_stats *pcpu_stats;
757
758                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
759                 u64_stats_update_begin(&pcpu_stats->syncp);
760                 pcpu_stats->rx_packets++;
761                 pcpu_stats->rx_bytes += skb->len;
762                 if (skb->pkt_type == PACKET_MULTICAST)
763                         pcpu_stats->rx_multicast++;
764                 u64_stats_update_end(&pcpu_stats->syncp);
765
766                 skb->dev = team->dev;
767         } else if (res == RX_HANDLER_EXACT) {
768                 this_cpu_inc(team->pcpu_stats->rx_nohandler);
769         } else {
770                 this_cpu_inc(team->pcpu_stats->rx_dropped);
771         }
772
773         return res;
774 }
775
776
777 /*************************************
778  * Multiqueue Tx port select override
779  *************************************/
780
781 static int team_queue_override_init(struct team *team)
782 {
783         struct list_head *listarr;
784         unsigned int queue_cnt = team->dev->num_tx_queues - 1;
785         unsigned int i;
786
787         if (!queue_cnt)
788                 return 0;
789         listarr = kmalloc_array(queue_cnt, sizeof(struct list_head),
790                                 GFP_KERNEL);
791         if (!listarr)
792                 return -ENOMEM;
793         team->qom_lists = listarr;
794         for (i = 0; i < queue_cnt; i++)
795                 INIT_LIST_HEAD(listarr++);
796         return 0;
797 }
798
799 static void team_queue_override_fini(struct team *team)
800 {
801         kfree(team->qom_lists);
802 }
803
804 static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
805 {
806         return &team->qom_lists[queue_id - 1];
807 }
808
809 /*
810  * note: already called with rcu_read_lock
811  */
812 static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
813 {
814         struct list_head *qom_list;
815         struct team_port *port;
816
817         if (!team->queue_override_enabled || !skb->queue_mapping)
818                 return false;
819         qom_list = __team_get_qom_list(team, skb->queue_mapping);
820         list_for_each_entry_rcu(port, qom_list, qom_list) {
821                 if (!team_dev_queue_xmit(team, port, skb))
822                         return true;
823         }
824         return false;
825 }
826
827 static void __team_queue_override_port_del(struct team *team,
828                                            struct team_port *port)
829 {
830         if (!port->queue_id)
831                 return;
832         list_del_rcu(&port->qom_list);
833 }
834
835 static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
836                                                       struct team_port *cur)
837 {
838         if (port->priority < cur->priority)
839                 return true;
840         if (port->priority > cur->priority)
841                 return false;
842         if (port->index < cur->index)
843                 return true;
844         return false;
845 }
846
847 static void __team_queue_override_port_add(struct team *team,
848                                            struct team_port *port)
849 {
850         struct team_port *cur;
851         struct list_head *qom_list;
852         struct list_head *node;
853
854         if (!port->queue_id)
855                 return;
856         qom_list = __team_get_qom_list(team, port->queue_id);
857         node = qom_list;
858         list_for_each_entry(cur, qom_list, qom_list) {
859                 if (team_queue_override_port_has_gt_prio_than(port, cur))
860                         break;
861                 node = &cur->qom_list;
862         }
863         list_add_tail_rcu(&port->qom_list, node);
864 }
865
866 static void __team_queue_override_enabled_check(struct team *team)
867 {
868         struct team_port *port;
869         bool enabled = false;
870
871         list_for_each_entry(port, &team->port_list, list) {
872                 if (port->queue_id) {
873                         enabled = true;
874                         break;
875                 }
876         }
877         if (enabled == team->queue_override_enabled)
878                 return;
879         netdev_dbg(team->dev, "%s queue override\n",
880                    enabled ? "Enabling" : "Disabling");
881         team->queue_override_enabled = enabled;
882 }
883
884 static void team_queue_override_port_prio_changed(struct team *team,
885                                                   struct team_port *port)
886 {
887         if (!port->queue_id || team_port_enabled(port))
888                 return;
889         __team_queue_override_port_del(team, port);
890         __team_queue_override_port_add(team, port);
891         __team_queue_override_enabled_check(team);
892 }
893
894 static void team_queue_override_port_change_queue_id(struct team *team,
895                                                      struct team_port *port,
896                                                      u16 new_queue_id)
897 {
898         if (team_port_enabled(port)) {
899                 __team_queue_override_port_del(team, port);
900                 port->queue_id = new_queue_id;
901                 __team_queue_override_port_add(team, port);
902                 __team_queue_override_enabled_check(team);
903         } else {
904                 port->queue_id = new_queue_id;
905         }
906 }
907
908 static void team_queue_override_port_add(struct team *team,
909                                          struct team_port *port)
910 {
911         __team_queue_override_port_add(team, port);
912         __team_queue_override_enabled_check(team);
913 }
914
915 static void team_queue_override_port_del(struct team *team,
916                                          struct team_port *port)
917 {
918         __team_queue_override_port_del(team, port);
919         __team_queue_override_enabled_check(team);
920 }
921
922
923 /****************
924  * Port handling
925  ****************/
926
927 static bool team_port_find(const struct team *team,
928                            const struct team_port *port)
929 {
930         struct team_port *cur;
931
932         list_for_each_entry(cur, &team->port_list, list)
933                 if (cur == port)
934                         return true;
935         return false;
936 }
937
938 /*
939  * Enable/disable port by adding to enabled port hashlist and setting
940  * port->index (Might be racy so reader could see incorrect ifindex when
941  * processing a flying packet, but that is not a problem). Write guarded
942  * by team->lock.
943  */
944 static void team_port_enable(struct team *team,
945                              struct team_port *port)
946 {
947         if (team_port_enabled(port))
948                 return;
949         port->index = team->en_port_count++;
950         hlist_add_head_rcu(&port->hlist,
951                            team_port_index_hash(team, port->index));
952         team_adjust_ops(team);
953         team_queue_override_port_add(team, port);
954         if (team->ops.port_enabled)
955                 team->ops.port_enabled(team, port);
956         team_notify_peers(team);
957         team_mcast_rejoin(team);
958         team_lower_state_changed(port);
959 }
960
961 static void __reconstruct_port_hlist(struct team *team, int rm_index)
962 {
963         int i;
964         struct team_port *port;
965
966         for (i = rm_index + 1; i < team->en_port_count; i++) {
967                 port = team_get_port_by_index(team, i);
968                 hlist_del_rcu(&port->hlist);
969                 port->index--;
970                 hlist_add_head_rcu(&port->hlist,
971                                    team_port_index_hash(team, port->index));
972         }
973 }
974
975 static void team_port_disable(struct team *team,
976                               struct team_port *port)
977 {
978         if (!team_port_enabled(port))
979                 return;
980         if (team->ops.port_disabled)
981                 team->ops.port_disabled(team, port);
982         hlist_del_rcu(&port->hlist);
983         __reconstruct_port_hlist(team, port->index);
984         port->index = -1;
985         team->en_port_count--;
986         team_queue_override_port_del(team, port);
987         team_adjust_ops(team);
988         team_lower_state_changed(port);
989 }
990
991 #define TEAM_VLAN_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
992                             NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
993                             NETIF_F_HIGHDMA | NETIF_F_LRO)
994
995 #define TEAM_ENC_FEATURES       (NETIF_F_HW_CSUM | NETIF_F_SG | \
996                                  NETIF_F_RXCSUM | NETIF_F_ALL_TSO)
997
998 static void __team_compute_features(struct team *team)
999 {
1000         struct team_port *port;
1001         netdev_features_t vlan_features = TEAM_VLAN_FEATURES &
1002                                           NETIF_F_ALL_FOR_ALL;
1003         netdev_features_t enc_features  = TEAM_ENC_FEATURES;
1004         unsigned short max_hard_header_len = ETH_HLEN;
1005         unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE |
1006                                         IFF_XMIT_DST_RELEASE_PERM;
1007
1008         list_for_each_entry(port, &team->port_list, list) {
1009                 vlan_features = netdev_increment_features(vlan_features,
1010                                         port->dev->vlan_features,
1011                                         TEAM_VLAN_FEATURES);
1012                 enc_features =
1013                         netdev_increment_features(enc_features,
1014                                                   port->dev->hw_enc_features,
1015                                                   TEAM_ENC_FEATURES);
1016
1017
1018                 dst_release_flag &= port->dev->priv_flags;
1019                 if (port->dev->hard_header_len > max_hard_header_len)
1020                         max_hard_header_len = port->dev->hard_header_len;
1021         }
1022
1023         team->dev->vlan_features = vlan_features;
1024         team->dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL |
1025                                      NETIF_F_GSO_UDP_L4;
1026         team->dev->hard_header_len = max_hard_header_len;
1027
1028         team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
1029         if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
1030                 team->dev->priv_flags |= IFF_XMIT_DST_RELEASE;
1031 }
1032
1033 static void team_compute_features(struct team *team)
1034 {
1035         mutex_lock(&team->lock);
1036         __team_compute_features(team);
1037         mutex_unlock(&team->lock);
1038         netdev_change_features(team->dev);
1039 }
1040
1041 static int team_port_enter(struct team *team, struct team_port *port)
1042 {
1043         int err = 0;
1044
1045         dev_hold(team->dev);
1046         if (team->ops.port_enter) {
1047                 err = team->ops.port_enter(team, port);
1048                 if (err) {
1049                         netdev_err(team->dev, "Device %s failed to enter team mode\n",
1050                                    port->dev->name);
1051                         goto err_port_enter;
1052                 }
1053         }
1054
1055         return 0;
1056
1057 err_port_enter:
1058         dev_put(team->dev);
1059
1060         return err;
1061 }
1062
1063 static void team_port_leave(struct team *team, struct team_port *port)
1064 {
1065         if (team->ops.port_leave)
1066                 team->ops.port_leave(team, port);
1067         dev_put(team->dev);
1068 }
1069
1070 #ifdef CONFIG_NET_POLL_CONTROLLER
1071 static int __team_port_enable_netpoll(struct team_port *port)
1072 {
1073         struct netpoll *np;
1074         int err;
1075
1076         np = kzalloc(sizeof(*np), GFP_KERNEL);
1077         if (!np)
1078                 return -ENOMEM;
1079
1080         err = __netpoll_setup(np, port->dev);
1081         if (err) {
1082                 kfree(np);
1083                 return err;
1084         }
1085         port->np = np;
1086         return err;
1087 }
1088
1089 static int team_port_enable_netpoll(struct team_port *port)
1090 {
1091         if (!port->team->dev->npinfo)
1092                 return 0;
1093
1094         return __team_port_enable_netpoll(port);
1095 }
1096
1097 static void team_port_disable_netpoll(struct team_port *port)
1098 {
1099         struct netpoll *np = port->np;
1100
1101         if (!np)
1102                 return;
1103         port->np = NULL;
1104
1105         __netpoll_free(np);
1106 }
1107 #else
1108 static int team_port_enable_netpoll(struct team_port *port)
1109 {
1110         return 0;
1111 }
1112 static void team_port_disable_netpoll(struct team_port *port)
1113 {
1114 }
1115 #endif
1116
1117 static int team_upper_dev_link(struct team *team, struct team_port *port,
1118                                struct netlink_ext_ack *extack)
1119 {
1120         struct netdev_lag_upper_info lag_upper_info;
1121         int err;
1122
1123         lag_upper_info.tx_type = team->mode->lag_tx_type;
1124         lag_upper_info.hash_type = NETDEV_LAG_HASH_UNKNOWN;
1125         err = netdev_master_upper_dev_link(port->dev, team->dev, NULL,
1126                                            &lag_upper_info, extack);
1127         if (err)
1128                 return err;
1129         port->dev->priv_flags |= IFF_TEAM_PORT;
1130         return 0;
1131 }
1132
1133 static void team_upper_dev_unlink(struct team *team, struct team_port *port)
1134 {
1135         netdev_upper_dev_unlink(port->dev, team->dev);
1136         port->dev->priv_flags &= ~IFF_TEAM_PORT;
1137 }
1138
1139 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1140 static int team_dev_type_check_change(struct net_device *dev,
1141                                       struct net_device *port_dev);
1142
1143 static int team_port_add(struct team *team, struct net_device *port_dev,
1144                          struct netlink_ext_ack *extack)
1145 {
1146         struct net_device *dev = team->dev;
1147         struct team_port *port;
1148         char *portname = port_dev->name;
1149         int err;
1150
1151         if (port_dev->flags & IFF_LOOPBACK) {
1152                 NL_SET_ERR_MSG(extack, "Loopback device can't be added as a team port");
1153                 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1154                            portname);
1155                 return -EINVAL;
1156         }
1157
1158         if (team_port_exists(port_dev)) {
1159                 NL_SET_ERR_MSG(extack, "Device is already a port of a team device");
1160                 netdev_err(dev, "Device %s is already a port "
1161                                 "of a team device\n", portname);
1162                 return -EBUSY;
1163         }
1164
1165         if (dev == port_dev) {
1166                 NL_SET_ERR_MSG(extack, "Cannot enslave team device to itself");
1167                 netdev_err(dev, "Cannot enslave team device to itself\n");
1168                 return -EINVAL;
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);
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         netif_addr_lock_bh(dev);
1262         dev_uc_sync_multiple(port_dev, dev);
1263         dev_mc_sync_multiple(port_dev, dev);
1264         netif_addr_unlock_bh(dev);
1265
1266         port->index = -1;
1267         list_add_tail_rcu(&port->list, &team->port_list);
1268         team_port_enable(team, port);
1269         __team_compute_features(team);
1270         __team_port_change_port_added(port, !!netif_carrier_ok(port_dev));
1271         __team_options_change_check(team);
1272
1273         netdev_info(dev, "Port device %s added\n", portname);
1274
1275         return 0;
1276
1277 err_option_port_add:
1278         team_upper_dev_unlink(team, port);
1279
1280 err_set_upper_link:
1281         netdev_rx_handler_unregister(port_dev);
1282
1283 err_handler_register:
1284         team_port_disable_netpoll(port);
1285
1286 err_enable_netpoll:
1287         vlan_vids_del_by_dev(port_dev, dev);
1288
1289 err_vids_add:
1290         dev_close(port_dev);
1291
1292 err_dev_open:
1293         team_port_leave(team, port);
1294         team_port_set_orig_dev_addr(port);
1295
1296 err_port_enter:
1297         dev_set_mtu(port_dev, port->orig.mtu);
1298
1299 err_set_mtu:
1300         kfree(port);
1301
1302         return err;
1303 }
1304
1305 static void __team_port_change_port_removed(struct team_port *port);
1306
1307 static int team_port_del(struct team *team, struct net_device *port_dev)
1308 {
1309         struct net_device *dev = team->dev;
1310         struct team_port *port;
1311         char *portname = port_dev->name;
1312
1313         port = team_port_get_rtnl(port_dev);
1314         if (!port || !team_port_find(team, port)) {
1315                 netdev_err(dev, "Device %s does not act as a port of this team\n",
1316                            portname);
1317                 return -ENOENT;
1318         }
1319
1320         team_port_disable(team, port);
1321         list_del_rcu(&port->list);
1322         team_upper_dev_unlink(team, port);
1323         netdev_rx_handler_unregister(port_dev);
1324         team_port_disable_netpoll(port);
1325         vlan_vids_del_by_dev(port_dev, dev);
1326         dev_uc_unsync(port_dev, dev);
1327         dev_mc_unsync(port_dev, dev);
1328         dev_close(port_dev);
1329         team_port_leave(team, port);
1330
1331         __team_option_inst_mark_removed_port(team, port);
1332         __team_options_change_check(team);
1333         __team_option_inst_del_port(team, port);
1334         __team_port_change_port_removed(port);
1335
1336         team_port_set_orig_dev_addr(port);
1337         dev_set_mtu(port_dev, port->orig.mtu);
1338         kfree_rcu(port, rcu);
1339         netdev_info(dev, "Port device %s removed\n", portname);
1340         __team_compute_features(team);
1341
1342         return 0;
1343 }
1344
1345
1346 /*****************
1347  * Net device ops
1348  *****************/
1349
1350 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1351 {
1352         ctx->data.str_val = team->mode->kind;
1353         return 0;
1354 }
1355
1356 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1357 {
1358         return team_change_mode(team, ctx->data.str_val);
1359 }
1360
1361 static int team_notify_peers_count_get(struct team *team,
1362                                        struct team_gsetter_ctx *ctx)
1363 {
1364         ctx->data.u32_val = team->notify_peers.count;
1365         return 0;
1366 }
1367
1368 static int team_notify_peers_count_set(struct team *team,
1369                                        struct team_gsetter_ctx *ctx)
1370 {
1371         team->notify_peers.count = ctx->data.u32_val;
1372         return 0;
1373 }
1374
1375 static int team_notify_peers_interval_get(struct team *team,
1376                                           struct team_gsetter_ctx *ctx)
1377 {
1378         ctx->data.u32_val = team->notify_peers.interval;
1379         return 0;
1380 }
1381
1382 static int team_notify_peers_interval_set(struct team *team,
1383                                           struct team_gsetter_ctx *ctx)
1384 {
1385         team->notify_peers.interval = ctx->data.u32_val;
1386         return 0;
1387 }
1388
1389 static int team_mcast_rejoin_count_get(struct team *team,
1390                                        struct team_gsetter_ctx *ctx)
1391 {
1392         ctx->data.u32_val = team->mcast_rejoin.count;
1393         return 0;
1394 }
1395
1396 static int team_mcast_rejoin_count_set(struct team *team,
1397                                        struct team_gsetter_ctx *ctx)
1398 {
1399         team->mcast_rejoin.count = ctx->data.u32_val;
1400         return 0;
1401 }
1402
1403 static int team_mcast_rejoin_interval_get(struct team *team,
1404                                           struct team_gsetter_ctx *ctx)
1405 {
1406         ctx->data.u32_val = team->mcast_rejoin.interval;
1407         return 0;
1408 }
1409
1410 static int team_mcast_rejoin_interval_set(struct team *team,
1411                                           struct team_gsetter_ctx *ctx)
1412 {
1413         team->mcast_rejoin.interval = ctx->data.u32_val;
1414         return 0;
1415 }
1416
1417 static int team_port_en_option_get(struct team *team,
1418                                    struct team_gsetter_ctx *ctx)
1419 {
1420         struct team_port *port = ctx->info->port;
1421
1422         ctx->data.bool_val = team_port_enabled(port);
1423         return 0;
1424 }
1425
1426 static int team_port_en_option_set(struct team *team,
1427                                    struct team_gsetter_ctx *ctx)
1428 {
1429         struct team_port *port = ctx->info->port;
1430
1431         if (ctx->data.bool_val)
1432                 team_port_enable(team, port);
1433         else
1434                 team_port_disable(team, port);
1435         return 0;
1436 }
1437
1438 static int team_user_linkup_option_get(struct team *team,
1439                                        struct team_gsetter_ctx *ctx)
1440 {
1441         struct team_port *port = ctx->info->port;
1442
1443         ctx->data.bool_val = port->user.linkup;
1444         return 0;
1445 }
1446
1447 static void __team_carrier_check(struct team *team);
1448
1449 static int team_user_linkup_option_set(struct team *team,
1450                                        struct team_gsetter_ctx *ctx)
1451 {
1452         struct team_port *port = ctx->info->port;
1453
1454         port->user.linkup = ctx->data.bool_val;
1455         team_refresh_port_linkup(port);
1456         __team_carrier_check(port->team);
1457         return 0;
1458 }
1459
1460 static int team_user_linkup_en_option_get(struct team *team,
1461                                           struct team_gsetter_ctx *ctx)
1462 {
1463         struct team_port *port = ctx->info->port;
1464
1465         ctx->data.bool_val = port->user.linkup_enabled;
1466         return 0;
1467 }
1468
1469 static int team_user_linkup_en_option_set(struct team *team,
1470                                           struct team_gsetter_ctx *ctx)
1471 {
1472         struct team_port *port = ctx->info->port;
1473
1474         port->user.linkup_enabled = ctx->data.bool_val;
1475         team_refresh_port_linkup(port);
1476         __team_carrier_check(port->team);
1477         return 0;
1478 }
1479
1480 static int team_priority_option_get(struct team *team,
1481                                     struct team_gsetter_ctx *ctx)
1482 {
1483         struct team_port *port = ctx->info->port;
1484
1485         ctx->data.s32_val = port->priority;
1486         return 0;
1487 }
1488
1489 static int team_priority_option_set(struct team *team,
1490                                     struct team_gsetter_ctx *ctx)
1491 {
1492         struct team_port *port = ctx->info->port;
1493         s32 priority = ctx->data.s32_val;
1494
1495         if (port->priority == priority)
1496                 return 0;
1497         port->priority = priority;
1498         team_queue_override_port_prio_changed(team, port);
1499         return 0;
1500 }
1501
1502 static int team_queue_id_option_get(struct team *team,
1503                                     struct team_gsetter_ctx *ctx)
1504 {
1505         struct team_port *port = ctx->info->port;
1506
1507         ctx->data.u32_val = port->queue_id;
1508         return 0;
1509 }
1510
1511 static int team_queue_id_option_set(struct team *team,
1512                                     struct team_gsetter_ctx *ctx)
1513 {
1514         struct team_port *port = ctx->info->port;
1515         u16 new_queue_id = ctx->data.u32_val;
1516
1517         if (port->queue_id == new_queue_id)
1518                 return 0;
1519         if (new_queue_id >= team->dev->real_num_tx_queues)
1520                 return -EINVAL;
1521         team_queue_override_port_change_queue_id(team, port, new_queue_id);
1522         return 0;
1523 }
1524
1525 static const struct team_option team_options[] = {
1526         {
1527                 .name = "mode",
1528                 .type = TEAM_OPTION_TYPE_STRING,
1529                 .getter = team_mode_option_get,
1530                 .setter = team_mode_option_set,
1531         },
1532         {
1533                 .name = "notify_peers_count",
1534                 .type = TEAM_OPTION_TYPE_U32,
1535                 .getter = team_notify_peers_count_get,
1536                 .setter = team_notify_peers_count_set,
1537         },
1538         {
1539                 .name = "notify_peers_interval",
1540                 .type = TEAM_OPTION_TYPE_U32,
1541                 .getter = team_notify_peers_interval_get,
1542                 .setter = team_notify_peers_interval_set,
1543         },
1544         {
1545                 .name = "mcast_rejoin_count",
1546                 .type = TEAM_OPTION_TYPE_U32,
1547                 .getter = team_mcast_rejoin_count_get,
1548                 .setter = team_mcast_rejoin_count_set,
1549         },
1550         {
1551                 .name = "mcast_rejoin_interval",
1552                 .type = TEAM_OPTION_TYPE_U32,
1553                 .getter = team_mcast_rejoin_interval_get,
1554                 .setter = team_mcast_rejoin_interval_set,
1555         },
1556         {
1557                 .name = "enabled",
1558                 .type = TEAM_OPTION_TYPE_BOOL,
1559                 .per_port = true,
1560                 .getter = team_port_en_option_get,
1561                 .setter = team_port_en_option_set,
1562         },
1563         {
1564                 .name = "user_linkup",
1565                 .type = TEAM_OPTION_TYPE_BOOL,
1566                 .per_port = true,
1567                 .getter = team_user_linkup_option_get,
1568                 .setter = team_user_linkup_option_set,
1569         },
1570         {
1571                 .name = "user_linkup_enabled",
1572                 .type = TEAM_OPTION_TYPE_BOOL,
1573                 .per_port = true,
1574                 .getter = team_user_linkup_en_option_get,
1575                 .setter = team_user_linkup_en_option_set,
1576         },
1577         {
1578                 .name = "priority",
1579                 .type = TEAM_OPTION_TYPE_S32,
1580                 .per_port = true,
1581                 .getter = team_priority_option_get,
1582                 .setter = team_priority_option_set,
1583         },
1584         {
1585                 .name = "queue_id",
1586                 .type = TEAM_OPTION_TYPE_U32,
1587                 .per_port = true,
1588                 .getter = team_queue_id_option_get,
1589                 .setter = team_queue_id_option_set,
1590         },
1591 };
1592
1593
1594 static int team_init(struct net_device *dev)
1595 {
1596         struct team *team = netdev_priv(dev);
1597         int i;
1598         int err;
1599
1600         team->dev = dev;
1601         mutex_init(&team->lock);
1602         team_set_no_mode(team);
1603
1604         team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1605         if (!team->pcpu_stats)
1606                 return -ENOMEM;
1607
1608         for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1609                 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1610         INIT_LIST_HEAD(&team->port_list);
1611         err = team_queue_override_init(team);
1612         if (err)
1613                 goto err_team_queue_override_init;
1614
1615         team_adjust_ops(team);
1616
1617         INIT_LIST_HEAD(&team->option_list);
1618         INIT_LIST_HEAD(&team->option_inst_list);
1619
1620         team_notify_peers_init(team);
1621         team_mcast_rejoin_init(team);
1622
1623         err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1624         if (err)
1625                 goto err_options_register;
1626         netif_carrier_off(dev);
1627
1628         netdev_lockdep_set_classes(dev);
1629
1630         return 0;
1631
1632 err_options_register:
1633         team_mcast_rejoin_fini(team);
1634         team_notify_peers_fini(team);
1635         team_queue_override_fini(team);
1636 err_team_queue_override_init:
1637         free_percpu(team->pcpu_stats);
1638
1639         return err;
1640 }
1641
1642 static void team_uninit(struct net_device *dev)
1643 {
1644         struct team *team = netdev_priv(dev);
1645         struct team_port *port;
1646         struct team_port *tmp;
1647
1648         mutex_lock(&team->lock);
1649         list_for_each_entry_safe(port, tmp, &team->port_list, list)
1650                 team_port_del(team, port->dev);
1651
1652         __team_change_mode(team, NULL); /* cleanup */
1653         __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1654         team_mcast_rejoin_fini(team);
1655         team_notify_peers_fini(team);
1656         team_queue_override_fini(team);
1657         mutex_unlock(&team->lock);
1658         netdev_change_features(dev);
1659 }
1660
1661 static void team_destructor(struct net_device *dev)
1662 {
1663         struct team *team = netdev_priv(dev);
1664
1665         free_percpu(team->pcpu_stats);
1666 }
1667
1668 static int team_open(struct net_device *dev)
1669 {
1670         return 0;
1671 }
1672
1673 static int team_close(struct net_device *dev)
1674 {
1675         return 0;
1676 }
1677
1678 /*
1679  * note: already called with rcu_read_lock
1680  */
1681 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1682 {
1683         struct team *team = netdev_priv(dev);
1684         bool tx_success;
1685         unsigned int len = skb->len;
1686
1687         tx_success = team_queue_override_transmit(team, skb);
1688         if (!tx_success)
1689                 tx_success = team->ops.transmit(team, skb);
1690         if (tx_success) {
1691                 struct team_pcpu_stats *pcpu_stats;
1692
1693                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1694                 u64_stats_update_begin(&pcpu_stats->syncp);
1695                 pcpu_stats->tx_packets++;
1696                 pcpu_stats->tx_bytes += len;
1697                 u64_stats_update_end(&pcpu_stats->syncp);
1698         } else {
1699                 this_cpu_inc(team->pcpu_stats->tx_dropped);
1700         }
1701
1702         return NETDEV_TX_OK;
1703 }
1704
1705 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1706                              struct net_device *sb_dev,
1707                              select_queue_fallback_t fallback)
1708 {
1709         /*
1710          * This helper function exists to help dev_pick_tx get the correct
1711          * destination queue.  Using a helper function skips a call to
1712          * skb_tx_hash and will put the skbs in the queue we expect on their
1713          * way down to the team driver.
1714          */
1715         u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1716
1717         /*
1718          * Save the original txq to restore before passing to the driver
1719          */
1720         qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1721
1722         if (unlikely(txq >= dev->real_num_tx_queues)) {
1723                 do {
1724                         txq -= dev->real_num_tx_queues;
1725                 } while (txq >= dev->real_num_tx_queues);
1726         }
1727         return txq;
1728 }
1729
1730 static void team_change_rx_flags(struct net_device *dev, int change)
1731 {
1732         struct team *team = netdev_priv(dev);
1733         struct team_port *port;
1734         int inc;
1735
1736         rcu_read_lock();
1737         list_for_each_entry_rcu(port, &team->port_list, list) {
1738                 if (change & IFF_PROMISC) {
1739                         inc = dev->flags & IFF_PROMISC ? 1 : -1;
1740                         dev_set_promiscuity(port->dev, inc);
1741                 }
1742                 if (change & IFF_ALLMULTI) {
1743                         inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1744                         dev_set_allmulti(port->dev, inc);
1745                 }
1746         }
1747         rcu_read_unlock();
1748 }
1749
1750 static void team_set_rx_mode(struct net_device *dev)
1751 {
1752         struct team *team = netdev_priv(dev);
1753         struct team_port *port;
1754
1755         rcu_read_lock();
1756         list_for_each_entry_rcu(port, &team->port_list, list) {
1757                 dev_uc_sync_multiple(port->dev, dev);
1758                 dev_mc_sync_multiple(port->dev, dev);
1759         }
1760         rcu_read_unlock();
1761 }
1762
1763 static int team_set_mac_address(struct net_device *dev, void *p)
1764 {
1765         struct sockaddr *addr = p;
1766         struct team *team = netdev_priv(dev);
1767         struct team_port *port;
1768
1769         if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1770                 return -EADDRNOTAVAIL;
1771         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1772         mutex_lock(&team->lock);
1773         list_for_each_entry(port, &team->port_list, list)
1774                 if (team->ops.port_change_dev_addr)
1775                         team->ops.port_change_dev_addr(team, port);
1776         mutex_unlock(&team->lock);
1777         return 0;
1778 }
1779
1780 static int team_change_mtu(struct net_device *dev, int new_mtu)
1781 {
1782         struct team *team = netdev_priv(dev);
1783         struct team_port *port;
1784         int err;
1785
1786         /*
1787          * Alhough this is reader, it's guarded by team lock. It's not possible
1788          * to traverse list in reverse under rcu_read_lock
1789          */
1790         mutex_lock(&team->lock);
1791         team->port_mtu_change_allowed = true;
1792         list_for_each_entry(port, &team->port_list, list) {
1793                 err = dev_set_mtu(port->dev, new_mtu);
1794                 if (err) {
1795                         netdev_err(dev, "Device %s failed to change mtu",
1796                                    port->dev->name);
1797                         goto unwind;
1798                 }
1799         }
1800         team->port_mtu_change_allowed = false;
1801         mutex_unlock(&team->lock);
1802
1803         dev->mtu = new_mtu;
1804
1805         return 0;
1806
1807 unwind:
1808         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1809                 dev_set_mtu(port->dev, dev->mtu);
1810         team->port_mtu_change_allowed = false;
1811         mutex_unlock(&team->lock);
1812
1813         return err;
1814 }
1815
1816 static void
1817 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1818 {
1819         struct team *team = netdev_priv(dev);
1820         struct team_pcpu_stats *p;
1821         u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1822         u32 rx_dropped = 0, tx_dropped = 0, rx_nohandler = 0;
1823         unsigned int start;
1824         int i;
1825
1826         for_each_possible_cpu(i) {
1827                 p = per_cpu_ptr(team->pcpu_stats, i);
1828                 do {
1829                         start = u64_stats_fetch_begin_irq(&p->syncp);
1830                         rx_packets      = p->rx_packets;
1831                         rx_bytes        = p->rx_bytes;
1832                         rx_multicast    = p->rx_multicast;
1833                         tx_packets      = p->tx_packets;
1834                         tx_bytes        = p->tx_bytes;
1835                 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
1836
1837                 stats->rx_packets       += rx_packets;
1838                 stats->rx_bytes         += rx_bytes;
1839                 stats->multicast        += rx_multicast;
1840                 stats->tx_packets       += tx_packets;
1841                 stats->tx_bytes         += tx_bytes;
1842                 /*
1843                  * rx_dropped, tx_dropped & rx_nohandler are u32,
1844                  * updated without syncp protection.
1845                  */
1846                 rx_dropped      += p->rx_dropped;
1847                 tx_dropped      += p->tx_dropped;
1848                 rx_nohandler    += p->rx_nohandler;
1849         }
1850         stats->rx_dropped       = rx_dropped;
1851         stats->tx_dropped       = tx_dropped;
1852         stats->rx_nohandler     = rx_nohandler;
1853 }
1854
1855 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1856 {
1857         struct team *team = netdev_priv(dev);
1858         struct team_port *port;
1859         int err;
1860
1861         /*
1862          * Alhough this is reader, it's guarded by team lock. It's not possible
1863          * to traverse list in reverse under rcu_read_lock
1864          */
1865         mutex_lock(&team->lock);
1866         list_for_each_entry(port, &team->port_list, list) {
1867                 err = vlan_vid_add(port->dev, proto, vid);
1868                 if (err)
1869                         goto unwind;
1870         }
1871         mutex_unlock(&team->lock);
1872
1873         return 0;
1874
1875 unwind:
1876         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1877                 vlan_vid_del(port->dev, proto, vid);
1878         mutex_unlock(&team->lock);
1879
1880         return err;
1881 }
1882
1883 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1884 {
1885         struct team *team = netdev_priv(dev);
1886         struct team_port *port;
1887
1888         mutex_lock(&team->lock);
1889         list_for_each_entry(port, &team->port_list, list)
1890                 vlan_vid_del(port->dev, proto, vid);
1891         mutex_unlock(&team->lock);
1892
1893         return 0;
1894 }
1895
1896 #ifdef CONFIG_NET_POLL_CONTROLLER
1897 static void team_poll_controller(struct net_device *dev)
1898 {
1899 }
1900
1901 static void __team_netpoll_cleanup(struct team *team)
1902 {
1903         struct team_port *port;
1904
1905         list_for_each_entry(port, &team->port_list, list)
1906                 team_port_disable_netpoll(port);
1907 }
1908
1909 static void team_netpoll_cleanup(struct net_device *dev)
1910 {
1911         struct team *team = netdev_priv(dev);
1912
1913         mutex_lock(&team->lock);
1914         __team_netpoll_cleanup(team);
1915         mutex_unlock(&team->lock);
1916 }
1917
1918 static int team_netpoll_setup(struct net_device *dev,
1919                               struct netpoll_info *npifo)
1920 {
1921         struct team *team = netdev_priv(dev);
1922         struct team_port *port;
1923         int err = 0;
1924
1925         mutex_lock(&team->lock);
1926         list_for_each_entry(port, &team->port_list, list) {
1927                 err = __team_port_enable_netpoll(port);
1928                 if (err) {
1929                         __team_netpoll_cleanup(team);
1930                         break;
1931                 }
1932         }
1933         mutex_unlock(&team->lock);
1934         return err;
1935 }
1936 #endif
1937
1938 static int team_add_slave(struct net_device *dev, struct net_device *port_dev,
1939                           struct netlink_ext_ack *extack)
1940 {
1941         struct team *team = netdev_priv(dev);
1942         int err;
1943
1944         mutex_lock(&team->lock);
1945         err = team_port_add(team, port_dev, extack);
1946         mutex_unlock(&team->lock);
1947
1948         if (!err)
1949                 netdev_change_features(dev);
1950
1951         return err;
1952 }
1953
1954 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1955 {
1956         struct team *team = netdev_priv(dev);
1957         int err;
1958
1959         mutex_lock(&team->lock);
1960         err = team_port_del(team, port_dev);
1961         mutex_unlock(&team->lock);
1962
1963         if (!err)
1964                 netdev_change_features(dev);
1965
1966         return err;
1967 }
1968
1969 static netdev_features_t team_fix_features(struct net_device *dev,
1970                                            netdev_features_t features)
1971 {
1972         struct team_port *port;
1973         struct team *team = netdev_priv(dev);
1974         netdev_features_t mask;
1975
1976         mask = features;
1977         features &= ~NETIF_F_ONE_FOR_ALL;
1978         features |= NETIF_F_ALL_FOR_ALL;
1979
1980         rcu_read_lock();
1981         list_for_each_entry_rcu(port, &team->port_list, list) {
1982                 features = netdev_increment_features(features,
1983                                                      port->dev->features,
1984                                                      mask);
1985         }
1986         rcu_read_unlock();
1987
1988         features = netdev_add_tso_features(features, mask);
1989
1990         return features;
1991 }
1992
1993 static int team_change_carrier(struct net_device *dev, bool new_carrier)
1994 {
1995         struct team *team = netdev_priv(dev);
1996
1997         team->user_carrier_enabled = true;
1998
1999         if (new_carrier)
2000                 netif_carrier_on(dev);
2001         else
2002                 netif_carrier_off(dev);
2003         return 0;
2004 }
2005
2006 static const struct net_device_ops team_netdev_ops = {
2007         .ndo_init               = team_init,
2008         .ndo_uninit             = team_uninit,
2009         .ndo_open               = team_open,
2010         .ndo_stop               = team_close,
2011         .ndo_start_xmit         = team_xmit,
2012         .ndo_select_queue       = team_select_queue,
2013         .ndo_change_rx_flags    = team_change_rx_flags,
2014         .ndo_set_rx_mode        = team_set_rx_mode,
2015         .ndo_set_mac_address    = team_set_mac_address,
2016         .ndo_change_mtu         = team_change_mtu,
2017         .ndo_get_stats64        = team_get_stats64,
2018         .ndo_vlan_rx_add_vid    = team_vlan_rx_add_vid,
2019         .ndo_vlan_rx_kill_vid   = team_vlan_rx_kill_vid,
2020 #ifdef CONFIG_NET_POLL_CONTROLLER
2021         .ndo_poll_controller    = team_poll_controller,
2022         .ndo_netpoll_setup      = team_netpoll_setup,
2023         .ndo_netpoll_cleanup    = team_netpoll_cleanup,
2024 #endif
2025         .ndo_add_slave          = team_add_slave,
2026         .ndo_del_slave          = team_del_slave,
2027         .ndo_fix_features       = team_fix_features,
2028         .ndo_change_carrier     = team_change_carrier,
2029         .ndo_features_check     = passthru_features_check,
2030 };
2031
2032 /***********************
2033  * ethtool interface
2034  ***********************/
2035
2036 static void team_ethtool_get_drvinfo(struct net_device *dev,
2037                                      struct ethtool_drvinfo *drvinfo)
2038 {
2039         strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
2040         strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2041 }
2042
2043 static const struct ethtool_ops team_ethtool_ops = {
2044         .get_drvinfo            = team_ethtool_get_drvinfo,
2045         .get_link               = ethtool_op_get_link,
2046 };
2047
2048 /***********************
2049  * rt netlink interface
2050  ***********************/
2051
2052 static void team_setup_by_port(struct net_device *dev,
2053                                struct net_device *port_dev)
2054 {
2055         dev->header_ops = port_dev->header_ops;
2056         dev->type = port_dev->type;
2057         dev->hard_header_len = port_dev->hard_header_len;
2058         dev->addr_len = port_dev->addr_len;
2059         dev->mtu = port_dev->mtu;
2060         memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2061         eth_hw_addr_inherit(dev, port_dev);
2062 }
2063
2064 static int team_dev_type_check_change(struct net_device *dev,
2065                                       struct net_device *port_dev)
2066 {
2067         struct team *team = netdev_priv(dev);
2068         char *portname = port_dev->name;
2069         int err;
2070
2071         if (dev->type == port_dev->type)
2072                 return 0;
2073         if (!list_empty(&team->port_list)) {
2074                 netdev_err(dev, "Device %s is of different type\n", portname);
2075                 return -EBUSY;
2076         }
2077         err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2078         err = notifier_to_errno(err);
2079         if (err) {
2080                 netdev_err(dev, "Refused to change device type\n");
2081                 return err;
2082         }
2083         dev_uc_flush(dev);
2084         dev_mc_flush(dev);
2085         team_setup_by_port(dev, port_dev);
2086         call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2087         return 0;
2088 }
2089
2090 static void team_setup(struct net_device *dev)
2091 {
2092         ether_setup(dev);
2093         dev->max_mtu = ETH_MAX_MTU;
2094
2095         dev->netdev_ops = &team_netdev_ops;
2096         dev->ethtool_ops = &team_ethtool_ops;
2097         dev->needs_free_netdev = true;
2098         dev->priv_destructor = team_destructor;
2099         dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2100         dev->priv_flags |= IFF_NO_QUEUE;
2101         dev->priv_flags |= IFF_TEAM;
2102
2103         /*
2104          * Indicate we support unicast address filtering. That way core won't
2105          * bring us to promisc mode in case a unicast addr is added.
2106          * Let this up to underlay drivers.
2107          */
2108         dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2109
2110         dev->features |= NETIF_F_LLTX;
2111         dev->features |= NETIF_F_GRO;
2112
2113         /* Don't allow team devices to change network namespaces. */
2114         dev->features |= NETIF_F_NETNS_LOCAL;
2115
2116         dev->hw_features = TEAM_VLAN_FEATURES |
2117                            NETIF_F_HW_VLAN_CTAG_TX |
2118                            NETIF_F_HW_VLAN_CTAG_RX |
2119                            NETIF_F_HW_VLAN_CTAG_FILTER;
2120
2121         dev->hw_features |= NETIF_F_GSO_ENCAP_ALL | NETIF_F_GSO_UDP_L4;
2122         dev->features |= dev->hw_features;
2123 }
2124
2125 static int team_newlink(struct net *src_net, struct net_device *dev,
2126                         struct nlattr *tb[], struct nlattr *data[],
2127                         struct netlink_ext_ack *extack)
2128 {
2129         if (tb[IFLA_ADDRESS] == NULL)
2130                 eth_hw_addr_random(dev);
2131
2132         return register_netdevice(dev);
2133 }
2134
2135 static int team_validate(struct nlattr *tb[], struct nlattr *data[],
2136                          struct netlink_ext_ack *extack)
2137 {
2138         if (tb[IFLA_ADDRESS]) {
2139                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2140                         return -EINVAL;
2141                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2142                         return -EADDRNOTAVAIL;
2143         }
2144         return 0;
2145 }
2146
2147 static unsigned int team_get_num_tx_queues(void)
2148 {
2149         return TEAM_DEFAULT_NUM_TX_QUEUES;
2150 }
2151
2152 static unsigned int team_get_num_rx_queues(void)
2153 {
2154         return TEAM_DEFAULT_NUM_RX_QUEUES;
2155 }
2156
2157 static struct rtnl_link_ops team_link_ops __read_mostly = {
2158         .kind                   = DRV_NAME,
2159         .priv_size              = sizeof(struct team),
2160         .setup                  = team_setup,
2161         .newlink                = team_newlink,
2162         .validate               = team_validate,
2163         .get_num_tx_queues      = team_get_num_tx_queues,
2164         .get_num_rx_queues      = team_get_num_rx_queues,
2165 };
2166
2167
2168 /***********************************
2169  * Generic netlink custom interface
2170  ***********************************/
2171
2172 static struct genl_family team_nl_family;
2173
2174 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2175         [TEAM_ATTR_UNSPEC]                      = { .type = NLA_UNSPEC, },
2176         [TEAM_ATTR_TEAM_IFINDEX]                = { .type = NLA_U32 },
2177         [TEAM_ATTR_LIST_OPTION]                 = { .type = NLA_NESTED },
2178         [TEAM_ATTR_LIST_PORT]                   = { .type = NLA_NESTED },
2179 };
2180
2181 static const struct nla_policy
2182 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2183         [TEAM_ATTR_OPTION_UNSPEC]               = { .type = NLA_UNSPEC, },
2184         [TEAM_ATTR_OPTION_NAME] = {
2185                 .type = NLA_STRING,
2186                 .len = TEAM_STRING_MAX_LEN,
2187         },
2188         [TEAM_ATTR_OPTION_CHANGED]              = { .type = NLA_FLAG },
2189         [TEAM_ATTR_OPTION_TYPE]                 = { .type = NLA_U8 },
2190         [TEAM_ATTR_OPTION_DATA]                 = { .type = NLA_BINARY },
2191 };
2192
2193 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2194 {
2195         struct sk_buff *msg;
2196         void *hdr;
2197         int err;
2198
2199         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2200         if (!msg)
2201                 return -ENOMEM;
2202
2203         hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2204                           &team_nl_family, 0, TEAM_CMD_NOOP);
2205         if (!hdr) {
2206                 err = -EMSGSIZE;
2207                 goto err_msg_put;
2208         }
2209
2210         genlmsg_end(msg, hdr);
2211
2212         return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2213
2214 err_msg_put:
2215         nlmsg_free(msg);
2216
2217         return err;
2218 }
2219
2220 /*
2221  * Netlink cmd functions should be locked by following two functions.
2222  * Since dev gets held here, that ensures dev won't disappear in between.
2223  */
2224 static struct team *team_nl_team_get(struct genl_info *info)
2225 {
2226         struct net *net = genl_info_net(info);
2227         int ifindex;
2228         struct net_device *dev;
2229         struct team *team;
2230
2231         if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2232                 return NULL;
2233
2234         ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2235         dev = dev_get_by_index(net, ifindex);
2236         if (!dev || dev->netdev_ops != &team_netdev_ops) {
2237                 if (dev)
2238                         dev_put(dev);
2239                 return NULL;
2240         }
2241
2242         team = netdev_priv(dev);
2243         mutex_lock(&team->lock);
2244         return team;
2245 }
2246
2247 static void team_nl_team_put(struct team *team)
2248 {
2249         mutex_unlock(&team->lock);
2250         dev_put(team->dev);
2251 }
2252
2253 typedef int team_nl_send_func_t(struct sk_buff *skb,
2254                                 struct team *team, u32 portid);
2255
2256 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2257 {
2258         return genlmsg_unicast(dev_net(team->dev), skb, portid);
2259 }
2260
2261 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2262                                        struct team_option_inst *opt_inst)
2263 {
2264         struct nlattr *option_item;
2265         struct team_option *option = opt_inst->option;
2266         struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2267         struct team_gsetter_ctx ctx;
2268         int err;
2269
2270         ctx.info = opt_inst_info;
2271         err = team_option_get(team, opt_inst, &ctx);
2272         if (err)
2273                 return err;
2274
2275         option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
2276         if (!option_item)
2277                 return -EMSGSIZE;
2278
2279         if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2280                 goto nest_cancel;
2281         if (opt_inst_info->port &&
2282             nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2283                         opt_inst_info->port->dev->ifindex))
2284                 goto nest_cancel;
2285         if (opt_inst->option->array_size &&
2286             nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2287                         opt_inst_info->array_index))
2288                 goto nest_cancel;
2289
2290         switch (option->type) {
2291         case TEAM_OPTION_TYPE_U32:
2292                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2293                         goto nest_cancel;
2294                 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2295                         goto nest_cancel;
2296                 break;
2297         case TEAM_OPTION_TYPE_STRING:
2298                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2299                         goto nest_cancel;
2300                 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2301                                    ctx.data.str_val))
2302                         goto nest_cancel;
2303                 break;
2304         case TEAM_OPTION_TYPE_BINARY:
2305                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2306                         goto nest_cancel;
2307                 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2308                             ctx.data.bin_val.ptr))
2309                         goto nest_cancel;
2310                 break;
2311         case TEAM_OPTION_TYPE_BOOL:
2312                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2313                         goto nest_cancel;
2314                 if (ctx.data.bool_val &&
2315                     nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2316                         goto nest_cancel;
2317                 break;
2318         case TEAM_OPTION_TYPE_S32:
2319                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2320                         goto nest_cancel;
2321                 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2322                         goto nest_cancel;
2323                 break;
2324         default:
2325                 BUG();
2326         }
2327         if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2328                 goto nest_cancel;
2329         if (opt_inst->changed) {
2330                 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2331                         goto nest_cancel;
2332                 opt_inst->changed = false;
2333         }
2334         nla_nest_end(skb, option_item);
2335         return 0;
2336
2337 nest_cancel:
2338         nla_nest_cancel(skb, option_item);
2339         return -EMSGSIZE;
2340 }
2341
2342 static int __send_and_alloc_skb(struct sk_buff **pskb,
2343                                 struct team *team, u32 portid,
2344                                 team_nl_send_func_t *send_func)
2345 {
2346         int err;
2347
2348         if (*pskb) {
2349                 err = send_func(*pskb, team, portid);
2350                 if (err)
2351                         return err;
2352         }
2353         *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2354         if (!*pskb)
2355                 return -ENOMEM;
2356         return 0;
2357 }
2358
2359 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2360                                     int flags, team_nl_send_func_t *send_func,
2361                                     struct list_head *sel_opt_inst_list)
2362 {
2363         struct nlattr *option_list;
2364         struct nlmsghdr *nlh;
2365         void *hdr;
2366         struct team_option_inst *opt_inst;
2367         int err;
2368         struct sk_buff *skb = NULL;
2369         bool incomplete;
2370         int i;
2371
2372         opt_inst = list_first_entry(sel_opt_inst_list,
2373                                     struct team_option_inst, tmp_list);
2374
2375 start_again:
2376         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2377         if (err)
2378                 return err;
2379
2380         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2381                           TEAM_CMD_OPTIONS_GET);
2382         if (!hdr) {
2383                 nlmsg_free(skb);
2384                 return -EMSGSIZE;
2385         }
2386
2387         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2388                 goto nla_put_failure;
2389         option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2390         if (!option_list)
2391                 goto nla_put_failure;
2392
2393         i = 0;
2394         incomplete = false;
2395         list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2396                 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2397                 if (err) {
2398                         if (err == -EMSGSIZE) {
2399                                 if (!i)
2400                                         goto errout;
2401                                 incomplete = true;
2402                                 break;
2403                         }
2404                         goto errout;
2405                 }
2406                 i++;
2407         }
2408
2409         nla_nest_end(skb, option_list);
2410         genlmsg_end(skb, hdr);
2411         if (incomplete)
2412                 goto start_again;
2413
2414 send_done:
2415         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2416         if (!nlh) {
2417                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2418                 if (err)
2419                         return err;
2420                 goto send_done;
2421         }
2422
2423         return send_func(skb, team, portid);
2424
2425 nla_put_failure:
2426         err = -EMSGSIZE;
2427 errout:
2428         nlmsg_free(skb);
2429         return err;
2430 }
2431
2432 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2433 {
2434         struct team *team;
2435         struct team_option_inst *opt_inst;
2436         int err;
2437         LIST_HEAD(sel_opt_inst_list);
2438
2439         team = team_nl_team_get(info);
2440         if (!team)
2441                 return -EINVAL;
2442
2443         list_for_each_entry(opt_inst, &team->option_inst_list, list)
2444                 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2445         err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2446                                        NLM_F_ACK, team_nl_send_unicast,
2447                                        &sel_opt_inst_list);
2448
2449         team_nl_team_put(team);
2450
2451         return err;
2452 }
2453
2454 static int team_nl_send_event_options_get(struct team *team,
2455                                           struct list_head *sel_opt_inst_list);
2456
2457 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2458 {
2459         struct team *team;
2460         int err = 0;
2461         int i;
2462         struct nlattr *nl_option;
2463         LIST_HEAD(opt_inst_list);
2464
2465         rtnl_lock();
2466
2467         team = team_nl_team_get(info);
2468         if (!team) {
2469                 err = -EINVAL;
2470                 goto rtnl_unlock;
2471         }
2472
2473         err = -EINVAL;
2474         if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2475                 err = -EINVAL;
2476                 goto team_put;
2477         }
2478
2479         nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2480                 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2481                 struct nlattr *attr;
2482                 struct nlattr *attr_data;
2483                 enum team_option_type opt_type;
2484                 int opt_port_ifindex = 0; /* != 0 for per-port options */
2485                 u32 opt_array_index = 0;
2486                 bool opt_is_array = false;
2487                 struct team_option_inst *opt_inst;
2488                 char *opt_name;
2489                 bool opt_found = false;
2490
2491                 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2492                         err = -EINVAL;
2493                         goto team_put;
2494                 }
2495                 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2496                                        nl_option, team_nl_option_policy,
2497                                        info->extack);
2498                 if (err)
2499                         goto team_put;
2500                 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2501                     !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2502                         err = -EINVAL;
2503                         goto team_put;
2504                 }
2505                 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2506                 case NLA_U32:
2507                         opt_type = TEAM_OPTION_TYPE_U32;
2508                         break;
2509                 case NLA_STRING:
2510                         opt_type = TEAM_OPTION_TYPE_STRING;
2511                         break;
2512                 case NLA_BINARY:
2513                         opt_type = TEAM_OPTION_TYPE_BINARY;
2514                         break;
2515                 case NLA_FLAG:
2516                         opt_type = TEAM_OPTION_TYPE_BOOL;
2517                         break;
2518                 case NLA_S32:
2519                         opt_type = TEAM_OPTION_TYPE_S32;
2520                         break;
2521                 default:
2522                         goto team_put;
2523                 }
2524
2525                 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2526                 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2527                         err = -EINVAL;
2528                         goto team_put;
2529                 }
2530
2531                 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2532                 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2533                 if (attr)
2534                         opt_port_ifindex = nla_get_u32(attr);
2535
2536                 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2537                 if (attr) {
2538                         opt_is_array = true;
2539                         opt_array_index = nla_get_u32(attr);
2540                 }
2541
2542                 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2543                         struct team_option *option = opt_inst->option;
2544                         struct team_gsetter_ctx ctx;
2545                         struct team_option_inst_info *opt_inst_info;
2546                         int tmp_ifindex;
2547
2548                         opt_inst_info = &opt_inst->info;
2549                         tmp_ifindex = opt_inst_info->port ?
2550                                       opt_inst_info->port->dev->ifindex : 0;
2551                         if (option->type != opt_type ||
2552                             strcmp(option->name, opt_name) ||
2553                             tmp_ifindex != opt_port_ifindex ||
2554                             (option->array_size && !opt_is_array) ||
2555                             opt_inst_info->array_index != opt_array_index)
2556                                 continue;
2557                         opt_found = true;
2558                         ctx.info = opt_inst_info;
2559                         switch (opt_type) {
2560                         case TEAM_OPTION_TYPE_U32:
2561                                 ctx.data.u32_val = nla_get_u32(attr_data);
2562                                 break;
2563                         case TEAM_OPTION_TYPE_STRING:
2564                                 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2565                                         err = -EINVAL;
2566                                         goto team_put;
2567                                 }
2568                                 ctx.data.str_val = nla_data(attr_data);
2569                                 break;
2570                         case TEAM_OPTION_TYPE_BINARY:
2571                                 ctx.data.bin_val.len = nla_len(attr_data);
2572                                 ctx.data.bin_val.ptr = nla_data(attr_data);
2573                                 break;
2574                         case TEAM_OPTION_TYPE_BOOL:
2575                                 ctx.data.bool_val = attr_data ? true : false;
2576                                 break;
2577                         case TEAM_OPTION_TYPE_S32:
2578                                 ctx.data.s32_val = nla_get_s32(attr_data);
2579                                 break;
2580                         default:
2581                                 BUG();
2582                         }
2583                         err = team_option_set(team, opt_inst, &ctx);
2584                         if (err)
2585                                 goto team_put;
2586                         opt_inst->changed = true;
2587
2588                         /* dumb/evil user-space can send us duplicate opt,
2589                          * keep only the last one
2590                          */
2591                         if (__team_option_inst_tmp_find(&opt_inst_list,
2592                                                         opt_inst))
2593                                 continue;
2594
2595                         list_add(&opt_inst->tmp_list, &opt_inst_list);
2596                 }
2597                 if (!opt_found) {
2598                         err = -ENOENT;
2599                         goto team_put;
2600                 }
2601         }
2602
2603         err = team_nl_send_event_options_get(team, &opt_inst_list);
2604
2605 team_put:
2606         team_nl_team_put(team);
2607 rtnl_unlock:
2608         rtnl_unlock();
2609         return err;
2610 }
2611
2612 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2613                                      struct team_port *port)
2614 {
2615         struct nlattr *port_item;
2616
2617         port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2618         if (!port_item)
2619                 goto nest_cancel;
2620         if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2621                 goto nest_cancel;
2622         if (port->changed) {
2623                 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2624                         goto nest_cancel;
2625                 port->changed = false;
2626         }
2627         if ((port->removed &&
2628              nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2629             (port->state.linkup &&
2630              nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2631             nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2632             nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2633                 goto nest_cancel;
2634         nla_nest_end(skb, port_item);
2635         return 0;
2636
2637 nest_cancel:
2638         nla_nest_cancel(skb, port_item);
2639         return -EMSGSIZE;
2640 }
2641
2642 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2643                                       int flags, team_nl_send_func_t *send_func,
2644                                       struct team_port *one_port)
2645 {
2646         struct nlattr *port_list;
2647         struct nlmsghdr *nlh;
2648         void *hdr;
2649         struct team_port *port;
2650         int err;
2651         struct sk_buff *skb = NULL;
2652         bool incomplete;
2653         int i;
2654
2655         port = list_first_entry_or_null(&team->port_list,
2656                                         struct team_port, list);
2657
2658 start_again:
2659         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2660         if (err)
2661                 return err;
2662
2663         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2664                           TEAM_CMD_PORT_LIST_GET);
2665         if (!hdr) {
2666                 nlmsg_free(skb);
2667                 return -EMSGSIZE;
2668         }
2669
2670         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2671                 goto nla_put_failure;
2672         port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2673         if (!port_list)
2674                 goto nla_put_failure;
2675
2676         i = 0;
2677         incomplete = false;
2678
2679         /* If one port is selected, called wants to send port list containing
2680          * only this port. Otherwise go through all listed ports and send all
2681          */
2682         if (one_port) {
2683                 err = team_nl_fill_one_port_get(skb, one_port);
2684                 if (err)
2685                         goto errout;
2686         } else if (port) {
2687                 list_for_each_entry_from(port, &team->port_list, list) {
2688                         err = team_nl_fill_one_port_get(skb, port);
2689                         if (err) {
2690                                 if (err == -EMSGSIZE) {
2691                                         if (!i)
2692                                                 goto errout;
2693                                         incomplete = true;
2694                                         break;
2695                                 }
2696                                 goto errout;
2697                         }
2698                         i++;
2699                 }
2700         }
2701
2702         nla_nest_end(skb, port_list);
2703         genlmsg_end(skb, hdr);
2704         if (incomplete)
2705                 goto start_again;
2706
2707 send_done:
2708         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2709         if (!nlh) {
2710                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2711                 if (err)
2712                         return err;
2713                 goto send_done;
2714         }
2715
2716         return send_func(skb, team, portid);
2717
2718 nla_put_failure:
2719         err = -EMSGSIZE;
2720 errout:
2721         nlmsg_free(skb);
2722         return err;
2723 }
2724
2725 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2726                                      struct genl_info *info)
2727 {
2728         struct team *team;
2729         int err;
2730
2731         team = team_nl_team_get(info);
2732         if (!team)
2733                 return -EINVAL;
2734
2735         err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2736                                          NLM_F_ACK, team_nl_send_unicast, NULL);
2737
2738         team_nl_team_put(team);
2739
2740         return err;
2741 }
2742
2743 static const struct genl_ops team_nl_ops[] = {
2744         {
2745                 .cmd = TEAM_CMD_NOOP,
2746                 .doit = team_nl_cmd_noop,
2747                 .policy = team_nl_policy,
2748         },
2749         {
2750                 .cmd = TEAM_CMD_OPTIONS_SET,
2751                 .doit = team_nl_cmd_options_set,
2752                 .policy = team_nl_policy,
2753                 .flags = GENL_ADMIN_PERM,
2754         },
2755         {
2756                 .cmd = TEAM_CMD_OPTIONS_GET,
2757                 .doit = team_nl_cmd_options_get,
2758                 .policy = team_nl_policy,
2759                 .flags = GENL_ADMIN_PERM,
2760         },
2761         {
2762                 .cmd = TEAM_CMD_PORT_LIST_GET,
2763                 .doit = team_nl_cmd_port_list_get,
2764                 .policy = team_nl_policy,
2765                 .flags = GENL_ADMIN_PERM,
2766         },
2767 };
2768
2769 static const struct genl_multicast_group team_nl_mcgrps[] = {
2770         { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2771 };
2772
2773 static struct genl_family team_nl_family __ro_after_init = {
2774         .name           = TEAM_GENL_NAME,
2775         .version        = TEAM_GENL_VERSION,
2776         .maxattr        = TEAM_ATTR_MAX,
2777         .netnsok        = true,
2778         .module         = THIS_MODULE,
2779         .ops            = team_nl_ops,
2780         .n_ops          = ARRAY_SIZE(team_nl_ops),
2781         .mcgrps         = team_nl_mcgrps,
2782         .n_mcgrps       = ARRAY_SIZE(team_nl_mcgrps),
2783 };
2784
2785 static int team_nl_send_multicast(struct sk_buff *skb,
2786                                   struct team *team, u32 portid)
2787 {
2788         return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2789                                        skb, 0, 0, GFP_KERNEL);
2790 }
2791
2792 static int team_nl_send_event_options_get(struct team *team,
2793                                           struct list_head *sel_opt_inst_list)
2794 {
2795         return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2796                                         sel_opt_inst_list);
2797 }
2798
2799 static int team_nl_send_event_port_get(struct team *team,
2800                                        struct team_port *port)
2801 {
2802         return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2803                                           port);
2804 }
2805
2806 static int __init team_nl_init(void)
2807 {
2808         return genl_register_family(&team_nl_family);
2809 }
2810
2811 static void team_nl_fini(void)
2812 {
2813         genl_unregister_family(&team_nl_family);
2814 }
2815
2816
2817 /******************
2818  * Change checkers
2819  ******************/
2820
2821 static void __team_options_change_check(struct team *team)
2822 {
2823         int err;
2824         struct team_option_inst *opt_inst;
2825         LIST_HEAD(sel_opt_inst_list);
2826
2827         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2828                 if (opt_inst->changed)
2829                         list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2830         }
2831         err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2832         if (err && err != -ESRCH)
2833                 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2834                             err);
2835 }
2836
2837 /* rtnl lock is held */
2838
2839 static void __team_port_change_send(struct team_port *port, bool linkup)
2840 {
2841         int err;
2842
2843         port->changed = true;
2844         port->state.linkup = linkup;
2845         team_refresh_port_linkup(port);
2846         if (linkup) {
2847                 struct ethtool_link_ksettings ecmd;
2848
2849                 err = __ethtool_get_link_ksettings(port->dev, &ecmd);
2850                 if (!err) {
2851                         port->state.speed = ecmd.base.speed;
2852                         port->state.duplex = ecmd.base.duplex;
2853                         goto send_event;
2854                 }
2855         }
2856         port->state.speed = 0;
2857         port->state.duplex = 0;
2858
2859 send_event:
2860         err = team_nl_send_event_port_get(port->team, port);
2861         if (err && err != -ESRCH)
2862                 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2863                             port->dev->name, err);
2864
2865 }
2866
2867 static void __team_carrier_check(struct team *team)
2868 {
2869         struct team_port *port;
2870         bool team_linkup;
2871
2872         if (team->user_carrier_enabled)
2873                 return;
2874
2875         team_linkup = false;
2876         list_for_each_entry(port, &team->port_list, list) {
2877                 if (port->linkup) {
2878                         team_linkup = true;
2879                         break;
2880                 }
2881         }
2882
2883         if (team_linkup)
2884                 netif_carrier_on(team->dev);
2885         else
2886                 netif_carrier_off(team->dev);
2887 }
2888
2889 static void __team_port_change_check(struct team_port *port, bool linkup)
2890 {
2891         if (port->state.linkup != linkup)
2892                 __team_port_change_send(port, linkup);
2893         __team_carrier_check(port->team);
2894 }
2895
2896 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2897 {
2898         __team_port_change_send(port, linkup);
2899         __team_carrier_check(port->team);
2900 }
2901
2902 static void __team_port_change_port_removed(struct team_port *port)
2903 {
2904         port->removed = true;
2905         __team_port_change_send(port, false);
2906         __team_carrier_check(port->team);
2907 }
2908
2909 static void team_port_change_check(struct team_port *port, bool linkup)
2910 {
2911         struct team *team = port->team;
2912
2913         mutex_lock(&team->lock);
2914         __team_port_change_check(port, linkup);
2915         mutex_unlock(&team->lock);
2916 }
2917
2918
2919 /************************************
2920  * Net device notifier event handler
2921  ************************************/
2922
2923 static int team_device_event(struct notifier_block *unused,
2924                              unsigned long event, void *ptr)
2925 {
2926         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2927         struct team_port *port;
2928
2929         port = team_port_get_rtnl(dev);
2930         if (!port)
2931                 return NOTIFY_DONE;
2932
2933         switch (event) {
2934         case NETDEV_UP:
2935                 if (netif_carrier_ok(dev))
2936                         team_port_change_check(port, true);
2937                 break;
2938         case NETDEV_DOWN:
2939                 team_port_change_check(port, false);
2940                 break;
2941         case NETDEV_CHANGE:
2942                 if (netif_running(port->dev))
2943                         team_port_change_check(port,
2944                                                !!netif_oper_up(port->dev));
2945                 break;
2946         case NETDEV_UNREGISTER:
2947                 team_del_slave(port->team->dev, dev);
2948                 break;
2949         case NETDEV_FEAT_CHANGE:
2950                 team_compute_features(port->team);
2951                 break;
2952         case NETDEV_PRECHANGEMTU:
2953                 /* Forbid to change mtu of underlaying device */
2954                 if (!port->team->port_mtu_change_allowed)
2955                         return NOTIFY_BAD;
2956                 break;
2957         case NETDEV_PRE_TYPE_CHANGE:
2958                 /* Forbid to change type of underlaying device */
2959                 return NOTIFY_BAD;
2960         case NETDEV_RESEND_IGMP:
2961                 /* Propagate to master device */
2962                 call_netdevice_notifiers(event, port->team->dev);
2963                 break;
2964         }
2965         return NOTIFY_DONE;
2966 }
2967
2968 static struct notifier_block team_notifier_block __read_mostly = {
2969         .notifier_call = team_device_event,
2970 };
2971
2972
2973 /***********************
2974  * Module init and exit
2975  ***********************/
2976
2977 static int __init team_module_init(void)
2978 {
2979         int err;
2980
2981         register_netdevice_notifier(&team_notifier_block);
2982
2983         err = rtnl_link_register(&team_link_ops);
2984         if (err)
2985                 goto err_rtnl_reg;
2986
2987         err = team_nl_init();
2988         if (err)
2989                 goto err_nl_init;
2990
2991         return 0;
2992
2993 err_nl_init:
2994         rtnl_link_unregister(&team_link_ops);
2995
2996 err_rtnl_reg:
2997         unregister_netdevice_notifier(&team_notifier_block);
2998
2999         return err;
3000 }
3001
3002 static void __exit team_module_exit(void)
3003 {
3004         team_nl_fini();
3005         rtnl_link_unregister(&team_link_ops);
3006         unregister_netdevice_notifier(&team_notifier_block);
3007 }
3008
3009 module_init(team_module_init);
3010 module_exit(team_module_exit);
3011
3012 MODULE_LICENSE("GPL v2");
3013 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
3014 MODULE_DESCRIPTION("Ethernet team device driver");
3015 MODULE_ALIAS_RTNL_LINK(DRV_NAME);