db633ae9f784a7cf0128e922a046160d25b898e1
[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_notify_peers(team);
989         team_mcast_rejoin(team);
990         team_lower_state_changed(port);
991 }
992
993 #define TEAM_VLAN_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
994                             NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
995                             NETIF_F_HIGHDMA | NETIF_F_LRO)
996
997 #define TEAM_ENC_FEATURES       (NETIF_F_HW_CSUM | NETIF_F_SG | \
998                                  NETIF_F_RXCSUM | NETIF_F_ALL_TSO)
999
1000 static void __team_compute_features(struct team *team)
1001 {
1002         struct team_port *port;
1003         netdev_features_t vlan_features = TEAM_VLAN_FEATURES &
1004                                           NETIF_F_ALL_FOR_ALL;
1005         netdev_features_t enc_features  = TEAM_ENC_FEATURES;
1006         unsigned short max_hard_header_len = ETH_HLEN;
1007         unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE |
1008                                         IFF_XMIT_DST_RELEASE_PERM;
1009
1010         list_for_each_entry(port, &team->port_list, list) {
1011                 vlan_features = netdev_increment_features(vlan_features,
1012                                         port->dev->vlan_features,
1013                                         TEAM_VLAN_FEATURES);
1014                 enc_features =
1015                         netdev_increment_features(enc_features,
1016                                                   port->dev->hw_enc_features,
1017                                                   TEAM_ENC_FEATURES);
1018
1019
1020                 dst_release_flag &= port->dev->priv_flags;
1021                 if (port->dev->hard_header_len > max_hard_header_len)
1022                         max_hard_header_len = port->dev->hard_header_len;
1023         }
1024
1025         team->dev->vlan_features = vlan_features;
1026         team->dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL |
1027                                      NETIF_F_GSO_UDP_L4;
1028         team->dev->hard_header_len = max_hard_header_len;
1029
1030         team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
1031         if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
1032                 team->dev->priv_flags |= IFF_XMIT_DST_RELEASE;
1033 }
1034
1035 static void team_compute_features(struct team *team)
1036 {
1037         mutex_lock(&team->lock);
1038         __team_compute_features(team);
1039         mutex_unlock(&team->lock);
1040         netdev_change_features(team->dev);
1041 }
1042
1043 static int team_port_enter(struct team *team, struct team_port *port)
1044 {
1045         int err = 0;
1046
1047         dev_hold(team->dev);
1048         if (team->ops.port_enter) {
1049                 err = team->ops.port_enter(team, port);
1050                 if (err) {
1051                         netdev_err(team->dev, "Device %s failed to enter team mode\n",
1052                                    port->dev->name);
1053                         goto err_port_enter;
1054                 }
1055         }
1056
1057         return 0;
1058
1059 err_port_enter:
1060         dev_put(team->dev);
1061
1062         return err;
1063 }
1064
1065 static void team_port_leave(struct team *team, struct team_port *port)
1066 {
1067         if (team->ops.port_leave)
1068                 team->ops.port_leave(team, port);
1069         dev_put(team->dev);
1070 }
1071
1072 #ifdef CONFIG_NET_POLL_CONTROLLER
1073 static int __team_port_enable_netpoll(struct team_port *port)
1074 {
1075         struct netpoll *np;
1076         int err;
1077
1078         np = kzalloc(sizeof(*np), GFP_KERNEL);
1079         if (!np)
1080                 return -ENOMEM;
1081
1082         err = __netpoll_setup(np, port->dev);
1083         if (err) {
1084                 kfree(np);
1085                 return err;
1086         }
1087         port->np = np;
1088         return err;
1089 }
1090
1091 static int team_port_enable_netpoll(struct team_port *port)
1092 {
1093         if (!port->team->dev->npinfo)
1094                 return 0;
1095
1096         return __team_port_enable_netpoll(port);
1097 }
1098
1099 static void team_port_disable_netpoll(struct team_port *port)
1100 {
1101         struct netpoll *np = port->np;
1102
1103         if (!np)
1104                 return;
1105         port->np = NULL;
1106
1107         __netpoll_free(np);
1108 }
1109 #else
1110 static int team_port_enable_netpoll(struct team_port *port)
1111 {
1112         return 0;
1113 }
1114 static void team_port_disable_netpoll(struct team_port *port)
1115 {
1116 }
1117 #endif
1118
1119 static int team_upper_dev_link(struct team *team, struct team_port *port,
1120                                struct netlink_ext_ack *extack)
1121 {
1122         struct netdev_lag_upper_info lag_upper_info;
1123         int err;
1124
1125         lag_upper_info.tx_type = team->mode->lag_tx_type;
1126         lag_upper_info.hash_type = NETDEV_LAG_HASH_UNKNOWN;
1127         err = netdev_master_upper_dev_link(port->dev, team->dev, NULL,
1128                                            &lag_upper_info, extack);
1129         if (err)
1130                 return err;
1131         port->dev->priv_flags |= IFF_TEAM_PORT;
1132         return 0;
1133 }
1134
1135 static void team_upper_dev_unlink(struct team *team, struct team_port *port)
1136 {
1137         netdev_upper_dev_unlink(port->dev, team->dev);
1138         port->dev->priv_flags &= ~IFF_TEAM_PORT;
1139 }
1140
1141 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1142 static int team_dev_type_check_change(struct net_device *dev,
1143                                       struct net_device *port_dev);
1144
1145 static int team_port_add(struct team *team, struct net_device *port_dev,
1146                          struct netlink_ext_ack *extack)
1147 {
1148         struct net_device *dev = team->dev;
1149         struct team_port *port;
1150         char *portname = port_dev->name;
1151         int err;
1152
1153         if (port_dev->flags & IFF_LOOPBACK) {
1154                 NL_SET_ERR_MSG(extack, "Loopback device can't be added as a team port");
1155                 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1156                            portname);
1157                 return -EINVAL;
1158         }
1159
1160         if (team_port_exists(port_dev)) {
1161                 NL_SET_ERR_MSG(extack, "Device is already a port of a team device");
1162                 netdev_err(dev, "Device %s is already a port "
1163                                 "of a team device\n", portname);
1164                 return -EBUSY;
1165         }
1166
1167         if (dev == port_dev) {
1168                 NL_SET_ERR_MSG(extack, "Cannot enslave team device to itself");
1169                 netdev_err(dev, "Cannot enslave team device to itself\n");
1170                 return -EINVAL;
1171         }
1172
1173         if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1174             vlan_uses_dev(dev)) {
1175                 NL_SET_ERR_MSG(extack, "Device is VLAN challenged and team device has VLAN set up");
1176                 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1177                            portname);
1178                 return -EPERM;
1179         }
1180
1181         err = team_dev_type_check_change(dev, port_dev);
1182         if (err)
1183                 return err;
1184
1185         if (port_dev->flags & IFF_UP) {
1186                 NL_SET_ERR_MSG(extack, "Device is up. Set it down before adding it as a team port");
1187                 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1188                            portname);
1189                 return -EBUSY;
1190         }
1191
1192         port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1193                        GFP_KERNEL);
1194         if (!port)
1195                 return -ENOMEM;
1196
1197         port->dev = port_dev;
1198         port->team = team;
1199         INIT_LIST_HEAD(&port->qom_list);
1200
1201         port->orig.mtu = port_dev->mtu;
1202         err = dev_set_mtu(port_dev, dev->mtu);
1203         if (err) {
1204                 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1205                 goto err_set_mtu;
1206         }
1207
1208         memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1209
1210         err = team_port_enter(team, port);
1211         if (err) {
1212                 netdev_err(dev, "Device %s failed to enter team mode\n",
1213                            portname);
1214                 goto err_port_enter;
1215         }
1216
1217         err = dev_open(port_dev);
1218         if (err) {
1219                 netdev_dbg(dev, "Device %s opening failed\n",
1220                            portname);
1221                 goto err_dev_open;
1222         }
1223
1224         err = vlan_vids_add_by_dev(port_dev, dev);
1225         if (err) {
1226                 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1227                                 portname);
1228                 goto err_vids_add;
1229         }
1230
1231         err = team_port_enable_netpoll(port);
1232         if (err) {
1233                 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1234                            portname);
1235                 goto err_enable_netpoll;
1236         }
1237
1238         if (!(dev->features & NETIF_F_LRO))
1239                 dev_disable_lro(port_dev);
1240
1241         err = netdev_rx_handler_register(port_dev, team_handle_frame,
1242                                          port);
1243         if (err) {
1244                 netdev_err(dev, "Device %s failed to register rx_handler\n",
1245                            portname);
1246                 goto err_handler_register;
1247         }
1248
1249         err = team_upper_dev_link(team, port, extack);
1250         if (err) {
1251                 netdev_err(dev, "Device %s failed to set upper link\n",
1252                            portname);
1253                 goto err_set_upper_link;
1254         }
1255
1256         err = __team_option_inst_add_port(team, port);
1257         if (err) {
1258                 netdev_err(dev, "Device %s failed to add per-port options\n",
1259                            portname);
1260                 goto err_option_port_add;
1261         }
1262
1263         netif_addr_lock_bh(dev);
1264         dev_uc_sync_multiple(port_dev, dev);
1265         dev_mc_sync_multiple(port_dev, dev);
1266         netif_addr_unlock_bh(dev);
1267
1268         port->index = -1;
1269         list_add_tail_rcu(&port->list, &team->port_list);
1270         team_port_enable(team, port);
1271         __team_compute_features(team);
1272         __team_port_change_port_added(port, !!netif_carrier_ok(port_dev));
1273         __team_options_change_check(team);
1274
1275         netdev_info(dev, "Port device %s added\n", portname);
1276
1277         return 0;
1278
1279 err_option_port_add:
1280         team_upper_dev_unlink(team, port);
1281
1282 err_set_upper_link:
1283         netdev_rx_handler_unregister(port_dev);
1284
1285 err_handler_register:
1286         team_port_disable_netpoll(port);
1287
1288 err_enable_netpoll:
1289         vlan_vids_del_by_dev(port_dev, dev);
1290
1291 err_vids_add:
1292         dev_close(port_dev);
1293
1294 err_dev_open:
1295         team_port_leave(team, port);
1296         team_port_set_orig_dev_addr(port);
1297
1298 err_port_enter:
1299         dev_set_mtu(port_dev, port->orig.mtu);
1300
1301 err_set_mtu:
1302         kfree(port);
1303
1304         return err;
1305 }
1306
1307 static void __team_port_change_port_removed(struct team_port *port);
1308
1309 static int team_port_del(struct team *team, struct net_device *port_dev)
1310 {
1311         struct net_device *dev = team->dev;
1312         struct team_port *port;
1313         char *portname = port_dev->name;
1314
1315         port = team_port_get_rtnl(port_dev);
1316         if (!port || !team_port_find(team, port)) {
1317                 netdev_err(dev, "Device %s does not act as a port of this team\n",
1318                            portname);
1319                 return -ENOENT;
1320         }
1321
1322         team_port_disable(team, port);
1323         list_del_rcu(&port->list);
1324         team_upper_dev_unlink(team, port);
1325         netdev_rx_handler_unregister(port_dev);
1326         team_port_disable_netpoll(port);
1327         vlan_vids_del_by_dev(port_dev, dev);
1328         dev_uc_unsync(port_dev, dev);
1329         dev_mc_unsync(port_dev, dev);
1330         dev_close(port_dev);
1331         team_port_leave(team, port);
1332
1333         __team_option_inst_mark_removed_port(team, port);
1334         __team_options_change_check(team);
1335         __team_option_inst_del_port(team, port);
1336         __team_port_change_port_removed(port);
1337
1338         team_port_set_orig_dev_addr(port);
1339         dev_set_mtu(port_dev, port->orig.mtu);
1340         kfree_rcu(port, rcu);
1341         netdev_info(dev, "Port device %s removed\n", portname);
1342         __team_compute_features(team);
1343
1344         return 0;
1345 }
1346
1347
1348 /*****************
1349  * Net device ops
1350  *****************/
1351
1352 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1353 {
1354         ctx->data.str_val = team->mode->kind;
1355         return 0;
1356 }
1357
1358 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1359 {
1360         return team_change_mode(team, ctx->data.str_val);
1361 }
1362
1363 static int team_notify_peers_count_get(struct team *team,
1364                                        struct team_gsetter_ctx *ctx)
1365 {
1366         ctx->data.u32_val = team->notify_peers.count;
1367         return 0;
1368 }
1369
1370 static int team_notify_peers_count_set(struct team *team,
1371                                        struct team_gsetter_ctx *ctx)
1372 {
1373         team->notify_peers.count = ctx->data.u32_val;
1374         return 0;
1375 }
1376
1377 static int team_notify_peers_interval_get(struct team *team,
1378                                           struct team_gsetter_ctx *ctx)
1379 {
1380         ctx->data.u32_val = team->notify_peers.interval;
1381         return 0;
1382 }
1383
1384 static int team_notify_peers_interval_set(struct team *team,
1385                                           struct team_gsetter_ctx *ctx)
1386 {
1387         team->notify_peers.interval = ctx->data.u32_val;
1388         return 0;
1389 }
1390
1391 static int team_mcast_rejoin_count_get(struct team *team,
1392                                        struct team_gsetter_ctx *ctx)
1393 {
1394         ctx->data.u32_val = team->mcast_rejoin.count;
1395         return 0;
1396 }
1397
1398 static int team_mcast_rejoin_count_set(struct team *team,
1399                                        struct team_gsetter_ctx *ctx)
1400 {
1401         team->mcast_rejoin.count = ctx->data.u32_val;
1402         return 0;
1403 }
1404
1405 static int team_mcast_rejoin_interval_get(struct team *team,
1406                                           struct team_gsetter_ctx *ctx)
1407 {
1408         ctx->data.u32_val = team->mcast_rejoin.interval;
1409         return 0;
1410 }
1411
1412 static int team_mcast_rejoin_interval_set(struct team *team,
1413                                           struct team_gsetter_ctx *ctx)
1414 {
1415         team->mcast_rejoin.interval = ctx->data.u32_val;
1416         return 0;
1417 }
1418
1419 static int team_port_en_option_get(struct team *team,
1420                                    struct team_gsetter_ctx *ctx)
1421 {
1422         struct team_port *port = ctx->info->port;
1423
1424         ctx->data.bool_val = team_port_enabled(port);
1425         return 0;
1426 }
1427
1428 static int team_port_en_option_set(struct team *team,
1429                                    struct team_gsetter_ctx *ctx)
1430 {
1431         struct team_port *port = ctx->info->port;
1432
1433         if (ctx->data.bool_val)
1434                 team_port_enable(team, port);
1435         else
1436                 team_port_disable(team, port);
1437         return 0;
1438 }
1439
1440 static int team_user_linkup_option_get(struct team *team,
1441                                        struct team_gsetter_ctx *ctx)
1442 {
1443         struct team_port *port = ctx->info->port;
1444
1445         ctx->data.bool_val = port->user.linkup;
1446         return 0;
1447 }
1448
1449 static void __team_carrier_check(struct team *team);
1450
1451 static int team_user_linkup_option_set(struct team *team,
1452                                        struct team_gsetter_ctx *ctx)
1453 {
1454         struct team_port *port = ctx->info->port;
1455
1456         port->user.linkup = ctx->data.bool_val;
1457         team_refresh_port_linkup(port);
1458         __team_carrier_check(port->team);
1459         return 0;
1460 }
1461
1462 static int team_user_linkup_en_option_get(struct team *team,
1463                                           struct team_gsetter_ctx *ctx)
1464 {
1465         struct team_port *port = ctx->info->port;
1466
1467         ctx->data.bool_val = port->user.linkup_enabled;
1468         return 0;
1469 }
1470
1471 static int team_user_linkup_en_option_set(struct team *team,
1472                                           struct team_gsetter_ctx *ctx)
1473 {
1474         struct team_port *port = ctx->info->port;
1475
1476         port->user.linkup_enabled = ctx->data.bool_val;
1477         team_refresh_port_linkup(port);
1478         __team_carrier_check(port->team);
1479         return 0;
1480 }
1481
1482 static int team_priority_option_get(struct team *team,
1483                                     struct team_gsetter_ctx *ctx)
1484 {
1485         struct team_port *port = ctx->info->port;
1486
1487         ctx->data.s32_val = port->priority;
1488         return 0;
1489 }
1490
1491 static int team_priority_option_set(struct team *team,
1492                                     struct team_gsetter_ctx *ctx)
1493 {
1494         struct team_port *port = ctx->info->port;
1495         s32 priority = ctx->data.s32_val;
1496
1497         if (port->priority == priority)
1498                 return 0;
1499         port->priority = priority;
1500         team_queue_override_port_prio_changed(team, port);
1501         return 0;
1502 }
1503
1504 static int team_queue_id_option_get(struct team *team,
1505                                     struct team_gsetter_ctx *ctx)
1506 {
1507         struct team_port *port = ctx->info->port;
1508
1509         ctx->data.u32_val = port->queue_id;
1510         return 0;
1511 }
1512
1513 static int team_queue_id_option_set(struct team *team,
1514                                     struct team_gsetter_ctx *ctx)
1515 {
1516         struct team_port *port = ctx->info->port;
1517         u16 new_queue_id = ctx->data.u32_val;
1518
1519         if (port->queue_id == new_queue_id)
1520                 return 0;
1521         if (new_queue_id >= team->dev->real_num_tx_queues)
1522                 return -EINVAL;
1523         team_queue_override_port_change_queue_id(team, port, new_queue_id);
1524         return 0;
1525 }
1526
1527 static const struct team_option team_options[] = {
1528         {
1529                 .name = "mode",
1530                 .type = TEAM_OPTION_TYPE_STRING,
1531                 .getter = team_mode_option_get,
1532                 .setter = team_mode_option_set,
1533         },
1534         {
1535                 .name = "notify_peers_count",
1536                 .type = TEAM_OPTION_TYPE_U32,
1537                 .getter = team_notify_peers_count_get,
1538                 .setter = team_notify_peers_count_set,
1539         },
1540         {
1541                 .name = "notify_peers_interval",
1542                 .type = TEAM_OPTION_TYPE_U32,
1543                 .getter = team_notify_peers_interval_get,
1544                 .setter = team_notify_peers_interval_set,
1545         },
1546         {
1547                 .name = "mcast_rejoin_count",
1548                 .type = TEAM_OPTION_TYPE_U32,
1549                 .getter = team_mcast_rejoin_count_get,
1550                 .setter = team_mcast_rejoin_count_set,
1551         },
1552         {
1553                 .name = "mcast_rejoin_interval",
1554                 .type = TEAM_OPTION_TYPE_U32,
1555                 .getter = team_mcast_rejoin_interval_get,
1556                 .setter = team_mcast_rejoin_interval_set,
1557         },
1558         {
1559                 .name = "enabled",
1560                 .type = TEAM_OPTION_TYPE_BOOL,
1561                 .per_port = true,
1562                 .getter = team_port_en_option_get,
1563                 .setter = team_port_en_option_set,
1564         },
1565         {
1566                 .name = "user_linkup",
1567                 .type = TEAM_OPTION_TYPE_BOOL,
1568                 .per_port = true,
1569                 .getter = team_user_linkup_option_get,
1570                 .setter = team_user_linkup_option_set,
1571         },
1572         {
1573                 .name = "user_linkup_enabled",
1574                 .type = TEAM_OPTION_TYPE_BOOL,
1575                 .per_port = true,
1576                 .getter = team_user_linkup_en_option_get,
1577                 .setter = team_user_linkup_en_option_set,
1578         },
1579         {
1580                 .name = "priority",
1581                 .type = TEAM_OPTION_TYPE_S32,
1582                 .per_port = true,
1583                 .getter = team_priority_option_get,
1584                 .setter = team_priority_option_set,
1585         },
1586         {
1587                 .name = "queue_id",
1588                 .type = TEAM_OPTION_TYPE_U32,
1589                 .per_port = true,
1590                 .getter = team_queue_id_option_get,
1591                 .setter = team_queue_id_option_set,
1592         },
1593 };
1594
1595
1596 static int team_init(struct net_device *dev)
1597 {
1598         struct team *team = netdev_priv(dev);
1599         int i;
1600         int err;
1601
1602         team->dev = dev;
1603         mutex_init(&team->lock);
1604         team_set_no_mode(team);
1605
1606         team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1607         if (!team->pcpu_stats)
1608                 return -ENOMEM;
1609
1610         for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1611                 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1612         INIT_LIST_HEAD(&team->port_list);
1613         err = team_queue_override_init(team);
1614         if (err)
1615                 goto err_team_queue_override_init;
1616
1617         team_adjust_ops(team);
1618
1619         INIT_LIST_HEAD(&team->option_list);
1620         INIT_LIST_HEAD(&team->option_inst_list);
1621
1622         team_notify_peers_init(team);
1623         team_mcast_rejoin_init(team);
1624
1625         err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1626         if (err)
1627                 goto err_options_register;
1628         netif_carrier_off(dev);
1629
1630         netdev_lockdep_set_classes(dev);
1631
1632         return 0;
1633
1634 err_options_register:
1635         team_mcast_rejoin_fini(team);
1636         team_notify_peers_fini(team);
1637         team_queue_override_fini(team);
1638 err_team_queue_override_init:
1639         free_percpu(team->pcpu_stats);
1640
1641         return err;
1642 }
1643
1644 static void team_uninit(struct net_device *dev)
1645 {
1646         struct team *team = netdev_priv(dev);
1647         struct team_port *port;
1648         struct team_port *tmp;
1649
1650         mutex_lock(&team->lock);
1651         list_for_each_entry_safe(port, tmp, &team->port_list, list)
1652                 team_port_del(team, port->dev);
1653
1654         __team_change_mode(team, NULL); /* cleanup */
1655         __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1656         team_mcast_rejoin_fini(team);
1657         team_notify_peers_fini(team);
1658         team_queue_override_fini(team);
1659         mutex_unlock(&team->lock);
1660         netdev_change_features(dev);
1661 }
1662
1663 static void team_destructor(struct net_device *dev)
1664 {
1665         struct team *team = netdev_priv(dev);
1666
1667         free_percpu(team->pcpu_stats);
1668 }
1669
1670 static int team_open(struct net_device *dev)
1671 {
1672         return 0;
1673 }
1674
1675 static int team_close(struct net_device *dev)
1676 {
1677         return 0;
1678 }
1679
1680 /*
1681  * note: already called with rcu_read_lock
1682  */
1683 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1684 {
1685         struct team *team = netdev_priv(dev);
1686         bool tx_success;
1687         unsigned int len = skb->len;
1688
1689         tx_success = team_queue_override_transmit(team, skb);
1690         if (!tx_success)
1691                 tx_success = team->ops.transmit(team, skb);
1692         if (tx_success) {
1693                 struct team_pcpu_stats *pcpu_stats;
1694
1695                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1696                 u64_stats_update_begin(&pcpu_stats->syncp);
1697                 pcpu_stats->tx_packets++;
1698                 pcpu_stats->tx_bytes += len;
1699                 u64_stats_update_end(&pcpu_stats->syncp);
1700         } else {
1701                 this_cpu_inc(team->pcpu_stats->tx_dropped);
1702         }
1703
1704         return NETDEV_TX_OK;
1705 }
1706
1707 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1708                              struct net_device *sb_dev,
1709                              select_queue_fallback_t fallback)
1710 {
1711         /*
1712          * This helper function exists to help dev_pick_tx get the correct
1713          * destination queue.  Using a helper function skips a call to
1714          * skb_tx_hash and will put the skbs in the queue we expect on their
1715          * way down to the team driver.
1716          */
1717         u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1718
1719         /*
1720          * Save the original txq to restore before passing to the driver
1721          */
1722         qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1723
1724         if (unlikely(txq >= dev->real_num_tx_queues)) {
1725                 do {
1726                         txq -= dev->real_num_tx_queues;
1727                 } while (txq >= dev->real_num_tx_queues);
1728         }
1729         return txq;
1730 }
1731
1732 static void team_change_rx_flags(struct net_device *dev, int change)
1733 {
1734         struct team *team = netdev_priv(dev);
1735         struct team_port *port;
1736         int inc;
1737
1738         rcu_read_lock();
1739         list_for_each_entry_rcu(port, &team->port_list, list) {
1740                 if (change & IFF_PROMISC) {
1741                         inc = dev->flags & IFF_PROMISC ? 1 : -1;
1742                         dev_set_promiscuity(port->dev, inc);
1743                 }
1744                 if (change & IFF_ALLMULTI) {
1745                         inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1746                         dev_set_allmulti(port->dev, inc);
1747                 }
1748         }
1749         rcu_read_unlock();
1750 }
1751
1752 static void team_set_rx_mode(struct net_device *dev)
1753 {
1754         struct team *team = netdev_priv(dev);
1755         struct team_port *port;
1756
1757         rcu_read_lock();
1758         list_for_each_entry_rcu(port, &team->port_list, list) {
1759                 dev_uc_sync_multiple(port->dev, dev);
1760                 dev_mc_sync_multiple(port->dev, dev);
1761         }
1762         rcu_read_unlock();
1763 }
1764
1765 static int team_set_mac_address(struct net_device *dev, void *p)
1766 {
1767         struct sockaddr *addr = p;
1768         struct team *team = netdev_priv(dev);
1769         struct team_port *port;
1770
1771         if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1772                 return -EADDRNOTAVAIL;
1773         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1774         mutex_lock(&team->lock);
1775         list_for_each_entry(port, &team->port_list, list)
1776                 if (team->ops.port_change_dev_addr)
1777                         team->ops.port_change_dev_addr(team, port);
1778         mutex_unlock(&team->lock);
1779         return 0;
1780 }
1781
1782 static int team_change_mtu(struct net_device *dev, int new_mtu)
1783 {
1784         struct team *team = netdev_priv(dev);
1785         struct team_port *port;
1786         int err;
1787
1788         /*
1789          * Alhough this is reader, it's guarded by team lock. It's not possible
1790          * to traverse list in reverse under rcu_read_lock
1791          */
1792         mutex_lock(&team->lock);
1793         team->port_mtu_change_allowed = true;
1794         list_for_each_entry(port, &team->port_list, list) {
1795                 err = dev_set_mtu(port->dev, new_mtu);
1796                 if (err) {
1797                         netdev_err(dev, "Device %s failed to change mtu",
1798                                    port->dev->name);
1799                         goto unwind;
1800                 }
1801         }
1802         team->port_mtu_change_allowed = false;
1803         mutex_unlock(&team->lock);
1804
1805         dev->mtu = new_mtu;
1806
1807         return 0;
1808
1809 unwind:
1810         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1811                 dev_set_mtu(port->dev, dev->mtu);
1812         team->port_mtu_change_allowed = false;
1813         mutex_unlock(&team->lock);
1814
1815         return err;
1816 }
1817
1818 static void
1819 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1820 {
1821         struct team *team = netdev_priv(dev);
1822         struct team_pcpu_stats *p;
1823         u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1824         u32 rx_dropped = 0, tx_dropped = 0, rx_nohandler = 0;
1825         unsigned int start;
1826         int i;
1827
1828         for_each_possible_cpu(i) {
1829                 p = per_cpu_ptr(team->pcpu_stats, i);
1830                 do {
1831                         start = u64_stats_fetch_begin_irq(&p->syncp);
1832                         rx_packets      = p->rx_packets;
1833                         rx_bytes        = p->rx_bytes;
1834                         rx_multicast    = p->rx_multicast;
1835                         tx_packets      = p->tx_packets;
1836                         tx_bytes        = p->tx_bytes;
1837                 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
1838
1839                 stats->rx_packets       += rx_packets;
1840                 stats->rx_bytes         += rx_bytes;
1841                 stats->multicast        += rx_multicast;
1842                 stats->tx_packets       += tx_packets;
1843                 stats->tx_bytes         += tx_bytes;
1844                 /*
1845                  * rx_dropped, tx_dropped & rx_nohandler are u32,
1846                  * updated without syncp protection.
1847                  */
1848                 rx_dropped      += p->rx_dropped;
1849                 tx_dropped      += p->tx_dropped;
1850                 rx_nohandler    += p->rx_nohandler;
1851         }
1852         stats->rx_dropped       = rx_dropped;
1853         stats->tx_dropped       = tx_dropped;
1854         stats->rx_nohandler     = rx_nohandler;
1855 }
1856
1857 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1858 {
1859         struct team *team = netdev_priv(dev);
1860         struct team_port *port;
1861         int err;
1862
1863         /*
1864          * Alhough this is reader, it's guarded by team lock. It's not possible
1865          * to traverse list in reverse under rcu_read_lock
1866          */
1867         mutex_lock(&team->lock);
1868         list_for_each_entry(port, &team->port_list, list) {
1869                 err = vlan_vid_add(port->dev, proto, vid);
1870                 if (err)
1871                         goto unwind;
1872         }
1873         mutex_unlock(&team->lock);
1874
1875         return 0;
1876
1877 unwind:
1878         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1879                 vlan_vid_del(port->dev, proto, vid);
1880         mutex_unlock(&team->lock);
1881
1882         return err;
1883 }
1884
1885 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1886 {
1887         struct team *team = netdev_priv(dev);
1888         struct team_port *port;
1889
1890         mutex_lock(&team->lock);
1891         list_for_each_entry(port, &team->port_list, list)
1892                 vlan_vid_del(port->dev, proto, vid);
1893         mutex_unlock(&team->lock);
1894
1895         return 0;
1896 }
1897
1898 #ifdef CONFIG_NET_POLL_CONTROLLER
1899 static void team_poll_controller(struct net_device *dev)
1900 {
1901 }
1902
1903 static void __team_netpoll_cleanup(struct team *team)
1904 {
1905         struct team_port *port;
1906
1907         list_for_each_entry(port, &team->port_list, list)
1908                 team_port_disable_netpoll(port);
1909 }
1910
1911 static void team_netpoll_cleanup(struct net_device *dev)
1912 {
1913         struct team *team = netdev_priv(dev);
1914
1915         mutex_lock(&team->lock);
1916         __team_netpoll_cleanup(team);
1917         mutex_unlock(&team->lock);
1918 }
1919
1920 static int team_netpoll_setup(struct net_device *dev,
1921                               struct netpoll_info *npifo)
1922 {
1923         struct team *team = netdev_priv(dev);
1924         struct team_port *port;
1925         int err = 0;
1926
1927         mutex_lock(&team->lock);
1928         list_for_each_entry(port, &team->port_list, list) {
1929                 err = __team_port_enable_netpoll(port);
1930                 if (err) {
1931                         __team_netpoll_cleanup(team);
1932                         break;
1933                 }
1934         }
1935         mutex_unlock(&team->lock);
1936         return err;
1937 }
1938 #endif
1939
1940 static int team_add_slave(struct net_device *dev, struct net_device *port_dev,
1941                           struct netlink_ext_ack *extack)
1942 {
1943         struct team *team = netdev_priv(dev);
1944         int err;
1945
1946         mutex_lock(&team->lock);
1947         err = team_port_add(team, port_dev, extack);
1948         mutex_unlock(&team->lock);
1949
1950         if (!err)
1951                 netdev_change_features(dev);
1952
1953         return err;
1954 }
1955
1956 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1957 {
1958         struct team *team = netdev_priv(dev);
1959         int err;
1960
1961         mutex_lock(&team->lock);
1962         err = team_port_del(team, port_dev);
1963         mutex_unlock(&team->lock);
1964
1965         if (!err)
1966                 netdev_change_features(dev);
1967
1968         return err;
1969 }
1970
1971 static netdev_features_t team_fix_features(struct net_device *dev,
1972                                            netdev_features_t features)
1973 {
1974         struct team_port *port;
1975         struct team *team = netdev_priv(dev);
1976         netdev_features_t mask;
1977
1978         mask = features;
1979         features &= ~NETIF_F_ONE_FOR_ALL;
1980         features |= NETIF_F_ALL_FOR_ALL;
1981
1982         rcu_read_lock();
1983         list_for_each_entry_rcu(port, &team->port_list, list) {
1984                 features = netdev_increment_features(features,
1985                                                      port->dev->features,
1986                                                      mask);
1987         }
1988         rcu_read_unlock();
1989
1990         features = netdev_add_tso_features(features, mask);
1991
1992         return features;
1993 }
1994
1995 static int team_change_carrier(struct net_device *dev, bool new_carrier)
1996 {
1997         struct team *team = netdev_priv(dev);
1998
1999         team->user_carrier_enabled = true;
2000
2001         if (new_carrier)
2002                 netif_carrier_on(dev);
2003         else
2004                 netif_carrier_off(dev);
2005         return 0;
2006 }
2007
2008 static const struct net_device_ops team_netdev_ops = {
2009         .ndo_init               = team_init,
2010         .ndo_uninit             = team_uninit,
2011         .ndo_open               = team_open,
2012         .ndo_stop               = team_close,
2013         .ndo_start_xmit         = team_xmit,
2014         .ndo_select_queue       = team_select_queue,
2015         .ndo_change_rx_flags    = team_change_rx_flags,
2016         .ndo_set_rx_mode        = team_set_rx_mode,
2017         .ndo_set_mac_address    = team_set_mac_address,
2018         .ndo_change_mtu         = team_change_mtu,
2019         .ndo_get_stats64        = team_get_stats64,
2020         .ndo_vlan_rx_add_vid    = team_vlan_rx_add_vid,
2021         .ndo_vlan_rx_kill_vid   = team_vlan_rx_kill_vid,
2022 #ifdef CONFIG_NET_POLL_CONTROLLER
2023         .ndo_poll_controller    = team_poll_controller,
2024         .ndo_netpoll_setup      = team_netpoll_setup,
2025         .ndo_netpoll_cleanup    = team_netpoll_cleanup,
2026 #endif
2027         .ndo_add_slave          = team_add_slave,
2028         .ndo_del_slave          = team_del_slave,
2029         .ndo_fix_features       = team_fix_features,
2030         .ndo_change_carrier     = team_change_carrier,
2031         .ndo_features_check     = passthru_features_check,
2032 };
2033
2034 /***********************
2035  * ethtool interface
2036  ***********************/
2037
2038 static void team_ethtool_get_drvinfo(struct net_device *dev,
2039                                      struct ethtool_drvinfo *drvinfo)
2040 {
2041         strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
2042         strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2043 }
2044
2045 static const struct ethtool_ops team_ethtool_ops = {
2046         .get_drvinfo            = team_ethtool_get_drvinfo,
2047         .get_link               = ethtool_op_get_link,
2048 };
2049
2050 /***********************
2051  * rt netlink interface
2052  ***********************/
2053
2054 static void team_setup_by_port(struct net_device *dev,
2055                                struct net_device *port_dev)
2056 {
2057         dev->header_ops = port_dev->header_ops;
2058         dev->type = port_dev->type;
2059         dev->hard_header_len = port_dev->hard_header_len;
2060         dev->addr_len = port_dev->addr_len;
2061         dev->mtu = port_dev->mtu;
2062         memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2063         eth_hw_addr_inherit(dev, port_dev);
2064 }
2065
2066 static int team_dev_type_check_change(struct net_device *dev,
2067                                       struct net_device *port_dev)
2068 {
2069         struct team *team = netdev_priv(dev);
2070         char *portname = port_dev->name;
2071         int err;
2072
2073         if (dev->type == port_dev->type)
2074                 return 0;
2075         if (!list_empty(&team->port_list)) {
2076                 netdev_err(dev, "Device %s is of different type\n", portname);
2077                 return -EBUSY;
2078         }
2079         err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2080         err = notifier_to_errno(err);
2081         if (err) {
2082                 netdev_err(dev, "Refused to change device type\n");
2083                 return err;
2084         }
2085         dev_uc_flush(dev);
2086         dev_mc_flush(dev);
2087         team_setup_by_port(dev, port_dev);
2088         call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2089         return 0;
2090 }
2091
2092 static void team_setup(struct net_device *dev)
2093 {
2094         ether_setup(dev);
2095         dev->max_mtu = ETH_MAX_MTU;
2096
2097         dev->netdev_ops = &team_netdev_ops;
2098         dev->ethtool_ops = &team_ethtool_ops;
2099         dev->needs_free_netdev = true;
2100         dev->priv_destructor = team_destructor;
2101         dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2102         dev->priv_flags |= IFF_NO_QUEUE;
2103         dev->priv_flags |= IFF_TEAM;
2104
2105         /*
2106          * Indicate we support unicast address filtering. That way core won't
2107          * bring us to promisc mode in case a unicast addr is added.
2108          * Let this up to underlay drivers.
2109          */
2110         dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2111
2112         dev->features |= NETIF_F_LLTX;
2113         dev->features |= NETIF_F_GRO;
2114
2115         /* Don't allow team devices to change network namespaces. */
2116         dev->features |= NETIF_F_NETNS_LOCAL;
2117
2118         dev->hw_features = TEAM_VLAN_FEATURES |
2119                            NETIF_F_HW_VLAN_CTAG_TX |
2120                            NETIF_F_HW_VLAN_CTAG_RX |
2121                            NETIF_F_HW_VLAN_CTAG_FILTER;
2122
2123         dev->hw_features |= NETIF_F_GSO_ENCAP_ALL | NETIF_F_GSO_UDP_L4;
2124         dev->features |= dev->hw_features;
2125 }
2126
2127 static int team_newlink(struct net *src_net, struct net_device *dev,
2128                         struct nlattr *tb[], struct nlattr *data[],
2129                         struct netlink_ext_ack *extack)
2130 {
2131         if (tb[IFLA_ADDRESS] == NULL)
2132                 eth_hw_addr_random(dev);
2133
2134         return register_netdevice(dev);
2135 }
2136
2137 static int team_validate(struct nlattr *tb[], struct nlattr *data[],
2138                          struct netlink_ext_ack *extack)
2139 {
2140         if (tb[IFLA_ADDRESS]) {
2141                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2142                         return -EINVAL;
2143                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2144                         return -EADDRNOTAVAIL;
2145         }
2146         return 0;
2147 }
2148
2149 static unsigned int team_get_num_tx_queues(void)
2150 {
2151         return TEAM_DEFAULT_NUM_TX_QUEUES;
2152 }
2153
2154 static unsigned int team_get_num_rx_queues(void)
2155 {
2156         return TEAM_DEFAULT_NUM_RX_QUEUES;
2157 }
2158
2159 static struct rtnl_link_ops team_link_ops __read_mostly = {
2160         .kind                   = DRV_NAME,
2161         .priv_size              = sizeof(struct team),
2162         .setup                  = team_setup,
2163         .newlink                = team_newlink,
2164         .validate               = team_validate,
2165         .get_num_tx_queues      = team_get_num_tx_queues,
2166         .get_num_rx_queues      = team_get_num_rx_queues,
2167 };
2168
2169
2170 /***********************************
2171  * Generic netlink custom interface
2172  ***********************************/
2173
2174 static struct genl_family team_nl_family;
2175
2176 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2177         [TEAM_ATTR_UNSPEC]                      = { .type = NLA_UNSPEC, },
2178         [TEAM_ATTR_TEAM_IFINDEX]                = { .type = NLA_U32 },
2179         [TEAM_ATTR_LIST_OPTION]                 = { .type = NLA_NESTED },
2180         [TEAM_ATTR_LIST_PORT]                   = { .type = NLA_NESTED },
2181 };
2182
2183 static const struct nla_policy
2184 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2185         [TEAM_ATTR_OPTION_UNSPEC]               = { .type = NLA_UNSPEC, },
2186         [TEAM_ATTR_OPTION_NAME] = {
2187                 .type = NLA_STRING,
2188                 .len = TEAM_STRING_MAX_LEN,
2189         },
2190         [TEAM_ATTR_OPTION_CHANGED]              = { .type = NLA_FLAG },
2191         [TEAM_ATTR_OPTION_TYPE]                 = { .type = NLA_U8 },
2192         [TEAM_ATTR_OPTION_DATA]                 = { .type = NLA_BINARY },
2193 };
2194
2195 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2196 {
2197         struct sk_buff *msg;
2198         void *hdr;
2199         int err;
2200
2201         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2202         if (!msg)
2203                 return -ENOMEM;
2204
2205         hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2206                           &team_nl_family, 0, TEAM_CMD_NOOP);
2207         if (!hdr) {
2208                 err = -EMSGSIZE;
2209                 goto err_msg_put;
2210         }
2211
2212         genlmsg_end(msg, hdr);
2213
2214         return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2215
2216 err_msg_put:
2217         nlmsg_free(msg);
2218
2219         return err;
2220 }
2221
2222 /*
2223  * Netlink cmd functions should be locked by following two functions.
2224  * Since dev gets held here, that ensures dev won't disappear in between.
2225  */
2226 static struct team *team_nl_team_get(struct genl_info *info)
2227 {
2228         struct net *net = genl_info_net(info);
2229         int ifindex;
2230         struct net_device *dev;
2231         struct team *team;
2232
2233         if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2234                 return NULL;
2235
2236         ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2237         dev = dev_get_by_index(net, ifindex);
2238         if (!dev || dev->netdev_ops != &team_netdev_ops) {
2239                 if (dev)
2240                         dev_put(dev);
2241                 return NULL;
2242         }
2243
2244         team = netdev_priv(dev);
2245         mutex_lock(&team->lock);
2246         return team;
2247 }
2248
2249 static void team_nl_team_put(struct team *team)
2250 {
2251         mutex_unlock(&team->lock);
2252         dev_put(team->dev);
2253 }
2254
2255 typedef int team_nl_send_func_t(struct sk_buff *skb,
2256                                 struct team *team, u32 portid);
2257
2258 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2259 {
2260         return genlmsg_unicast(dev_net(team->dev), skb, portid);
2261 }
2262
2263 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2264                                        struct team_option_inst *opt_inst)
2265 {
2266         struct nlattr *option_item;
2267         struct team_option *option = opt_inst->option;
2268         struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2269         struct team_gsetter_ctx ctx;
2270         int err;
2271
2272         ctx.info = opt_inst_info;
2273         err = team_option_get(team, opt_inst, &ctx);
2274         if (err)
2275                 return err;
2276
2277         option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
2278         if (!option_item)
2279                 return -EMSGSIZE;
2280
2281         if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2282                 goto nest_cancel;
2283         if (opt_inst_info->port &&
2284             nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2285                         opt_inst_info->port->dev->ifindex))
2286                 goto nest_cancel;
2287         if (opt_inst->option->array_size &&
2288             nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2289                         opt_inst_info->array_index))
2290                 goto nest_cancel;
2291
2292         switch (option->type) {
2293         case TEAM_OPTION_TYPE_U32:
2294                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2295                         goto nest_cancel;
2296                 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2297                         goto nest_cancel;
2298                 break;
2299         case TEAM_OPTION_TYPE_STRING:
2300                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2301                         goto nest_cancel;
2302                 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2303                                    ctx.data.str_val))
2304                         goto nest_cancel;
2305                 break;
2306         case TEAM_OPTION_TYPE_BINARY:
2307                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2308                         goto nest_cancel;
2309                 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2310                             ctx.data.bin_val.ptr))
2311                         goto nest_cancel;
2312                 break;
2313         case TEAM_OPTION_TYPE_BOOL:
2314                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2315                         goto nest_cancel;
2316                 if (ctx.data.bool_val &&
2317                     nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2318                         goto nest_cancel;
2319                 break;
2320         case TEAM_OPTION_TYPE_S32:
2321                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2322                         goto nest_cancel;
2323                 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2324                         goto nest_cancel;
2325                 break;
2326         default:
2327                 BUG();
2328         }
2329         if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2330                 goto nest_cancel;
2331         if (opt_inst->changed) {
2332                 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2333                         goto nest_cancel;
2334                 opt_inst->changed = false;
2335         }
2336         nla_nest_end(skb, option_item);
2337         return 0;
2338
2339 nest_cancel:
2340         nla_nest_cancel(skb, option_item);
2341         return -EMSGSIZE;
2342 }
2343
2344 static int __send_and_alloc_skb(struct sk_buff **pskb,
2345                                 struct team *team, u32 portid,
2346                                 team_nl_send_func_t *send_func)
2347 {
2348         int err;
2349
2350         if (*pskb) {
2351                 err = send_func(*pskb, team, portid);
2352                 if (err)
2353                         return err;
2354         }
2355         *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2356         if (!*pskb)
2357                 return -ENOMEM;
2358         return 0;
2359 }
2360
2361 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2362                                     int flags, team_nl_send_func_t *send_func,
2363                                     struct list_head *sel_opt_inst_list)
2364 {
2365         struct nlattr *option_list;
2366         struct nlmsghdr *nlh;
2367         void *hdr;
2368         struct team_option_inst *opt_inst;
2369         int err;
2370         struct sk_buff *skb = NULL;
2371         bool incomplete;
2372         int i;
2373
2374         opt_inst = list_first_entry(sel_opt_inst_list,
2375                                     struct team_option_inst, tmp_list);
2376
2377 start_again:
2378         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2379         if (err)
2380                 return err;
2381
2382         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2383                           TEAM_CMD_OPTIONS_GET);
2384         if (!hdr) {
2385                 nlmsg_free(skb);
2386                 return -EMSGSIZE;
2387         }
2388
2389         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2390                 goto nla_put_failure;
2391         option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2392         if (!option_list)
2393                 goto nla_put_failure;
2394
2395         i = 0;
2396         incomplete = false;
2397         list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2398                 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2399                 if (err) {
2400                         if (err == -EMSGSIZE) {
2401                                 if (!i)
2402                                         goto errout;
2403                                 incomplete = true;
2404                                 break;
2405                         }
2406                         goto errout;
2407                 }
2408                 i++;
2409         }
2410
2411         nla_nest_end(skb, option_list);
2412         genlmsg_end(skb, hdr);
2413         if (incomplete)
2414                 goto start_again;
2415
2416 send_done:
2417         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2418         if (!nlh) {
2419                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2420                 if (err)
2421                         return err;
2422                 goto send_done;
2423         }
2424
2425         return send_func(skb, team, portid);
2426
2427 nla_put_failure:
2428         err = -EMSGSIZE;
2429 errout:
2430         nlmsg_free(skb);
2431         return err;
2432 }
2433
2434 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2435 {
2436         struct team *team;
2437         struct team_option_inst *opt_inst;
2438         int err;
2439         LIST_HEAD(sel_opt_inst_list);
2440
2441         team = team_nl_team_get(info);
2442         if (!team)
2443                 return -EINVAL;
2444
2445         list_for_each_entry(opt_inst, &team->option_inst_list, list)
2446                 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2447         err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2448                                        NLM_F_ACK, team_nl_send_unicast,
2449                                        &sel_opt_inst_list);
2450
2451         team_nl_team_put(team);
2452
2453         return err;
2454 }
2455
2456 static int team_nl_send_event_options_get(struct team *team,
2457                                           struct list_head *sel_opt_inst_list);
2458
2459 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2460 {
2461         struct team *team;
2462         int err = 0;
2463         int i;
2464         struct nlattr *nl_option;
2465         LIST_HEAD(opt_inst_list);
2466
2467         rtnl_lock();
2468
2469         team = team_nl_team_get(info);
2470         if (!team) {
2471                 err = -EINVAL;
2472                 goto rtnl_unlock;
2473         }
2474
2475         err = -EINVAL;
2476         if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2477                 err = -EINVAL;
2478                 goto team_put;
2479         }
2480
2481         nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2482                 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2483                 struct nlattr *attr;
2484                 struct nlattr *attr_data;
2485                 enum team_option_type opt_type;
2486                 int opt_port_ifindex = 0; /* != 0 for per-port options */
2487                 u32 opt_array_index = 0;
2488                 bool opt_is_array = false;
2489                 struct team_option_inst *opt_inst;
2490                 char *opt_name;
2491                 bool opt_found = false;
2492
2493                 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2494                         err = -EINVAL;
2495                         goto team_put;
2496                 }
2497                 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2498                                        nl_option, team_nl_option_policy,
2499                                        info->extack);
2500                 if (err)
2501                         goto team_put;
2502                 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2503                     !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2504                         err = -EINVAL;
2505                         goto team_put;
2506                 }
2507                 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2508                 case NLA_U32:
2509                         opt_type = TEAM_OPTION_TYPE_U32;
2510                         break;
2511                 case NLA_STRING:
2512                         opt_type = TEAM_OPTION_TYPE_STRING;
2513                         break;
2514                 case NLA_BINARY:
2515                         opt_type = TEAM_OPTION_TYPE_BINARY;
2516                         break;
2517                 case NLA_FLAG:
2518                         opt_type = TEAM_OPTION_TYPE_BOOL;
2519                         break;
2520                 case NLA_S32:
2521                         opt_type = TEAM_OPTION_TYPE_S32;
2522                         break;
2523                 default:
2524                         goto team_put;
2525                 }
2526
2527                 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2528                 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2529                         err = -EINVAL;
2530                         goto team_put;
2531                 }
2532
2533                 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2534                 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2535                 if (attr)
2536                         opt_port_ifindex = nla_get_u32(attr);
2537
2538                 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2539                 if (attr) {
2540                         opt_is_array = true;
2541                         opt_array_index = nla_get_u32(attr);
2542                 }
2543
2544                 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2545                         struct team_option *option = opt_inst->option;
2546                         struct team_gsetter_ctx ctx;
2547                         struct team_option_inst_info *opt_inst_info;
2548                         int tmp_ifindex;
2549
2550                         opt_inst_info = &opt_inst->info;
2551                         tmp_ifindex = opt_inst_info->port ?
2552                                       opt_inst_info->port->dev->ifindex : 0;
2553                         if (option->type != opt_type ||
2554                             strcmp(option->name, opt_name) ||
2555                             tmp_ifindex != opt_port_ifindex ||
2556                             (option->array_size && !opt_is_array) ||
2557                             opt_inst_info->array_index != opt_array_index)
2558                                 continue;
2559                         opt_found = true;
2560                         ctx.info = opt_inst_info;
2561                         switch (opt_type) {
2562                         case TEAM_OPTION_TYPE_U32:
2563                                 ctx.data.u32_val = nla_get_u32(attr_data);
2564                                 break;
2565                         case TEAM_OPTION_TYPE_STRING:
2566                                 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2567                                         err = -EINVAL;
2568                                         goto team_put;
2569                                 }
2570                                 ctx.data.str_val = nla_data(attr_data);
2571                                 break;
2572                         case TEAM_OPTION_TYPE_BINARY:
2573                                 ctx.data.bin_val.len = nla_len(attr_data);
2574                                 ctx.data.bin_val.ptr = nla_data(attr_data);
2575                                 break;
2576                         case TEAM_OPTION_TYPE_BOOL:
2577                                 ctx.data.bool_val = attr_data ? true : false;
2578                                 break;
2579                         case TEAM_OPTION_TYPE_S32:
2580                                 ctx.data.s32_val = nla_get_s32(attr_data);
2581                                 break;
2582                         default:
2583                                 BUG();
2584                         }
2585                         err = team_option_set(team, opt_inst, &ctx);
2586                         if (err)
2587                                 goto team_put;
2588                         opt_inst->changed = true;
2589
2590                         /* dumb/evil user-space can send us duplicate opt,
2591                          * keep only the last one
2592                          */
2593                         if (__team_option_inst_tmp_find(&opt_inst_list,
2594                                                         opt_inst))
2595                                 continue;
2596
2597                         list_add(&opt_inst->tmp_list, &opt_inst_list);
2598                 }
2599                 if (!opt_found) {
2600                         err = -ENOENT;
2601                         goto team_put;
2602                 }
2603         }
2604
2605         err = team_nl_send_event_options_get(team, &opt_inst_list);
2606
2607 team_put:
2608         team_nl_team_put(team);
2609 rtnl_unlock:
2610         rtnl_unlock();
2611         return err;
2612 }
2613
2614 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2615                                      struct team_port *port)
2616 {
2617         struct nlattr *port_item;
2618
2619         port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2620         if (!port_item)
2621                 goto nest_cancel;
2622         if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2623                 goto nest_cancel;
2624         if (port->changed) {
2625                 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2626                         goto nest_cancel;
2627                 port->changed = false;
2628         }
2629         if ((port->removed &&
2630              nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2631             (port->state.linkup &&
2632              nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2633             nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2634             nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2635                 goto nest_cancel;
2636         nla_nest_end(skb, port_item);
2637         return 0;
2638
2639 nest_cancel:
2640         nla_nest_cancel(skb, port_item);
2641         return -EMSGSIZE;
2642 }
2643
2644 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2645                                       int flags, team_nl_send_func_t *send_func,
2646                                       struct team_port *one_port)
2647 {
2648         struct nlattr *port_list;
2649         struct nlmsghdr *nlh;
2650         void *hdr;
2651         struct team_port *port;
2652         int err;
2653         struct sk_buff *skb = NULL;
2654         bool incomplete;
2655         int i;
2656
2657         port = list_first_entry_or_null(&team->port_list,
2658                                         struct team_port, list);
2659
2660 start_again:
2661         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2662         if (err)
2663                 return err;
2664
2665         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2666                           TEAM_CMD_PORT_LIST_GET);
2667         if (!hdr) {
2668                 nlmsg_free(skb);
2669                 return -EMSGSIZE;
2670         }
2671
2672         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2673                 goto nla_put_failure;
2674         port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2675         if (!port_list)
2676                 goto nla_put_failure;
2677
2678         i = 0;
2679         incomplete = false;
2680
2681         /* If one port is selected, called wants to send port list containing
2682          * only this port. Otherwise go through all listed ports and send all
2683          */
2684         if (one_port) {
2685                 err = team_nl_fill_one_port_get(skb, one_port);
2686                 if (err)
2687                         goto errout;
2688         } else if (port) {
2689                 list_for_each_entry_from(port, &team->port_list, list) {
2690                         err = team_nl_fill_one_port_get(skb, port);
2691                         if (err) {
2692                                 if (err == -EMSGSIZE) {
2693                                         if (!i)
2694                                                 goto errout;
2695                                         incomplete = true;
2696                                         break;
2697                                 }
2698                                 goto errout;
2699                         }
2700                         i++;
2701                 }
2702         }
2703
2704         nla_nest_end(skb, port_list);
2705         genlmsg_end(skb, hdr);
2706         if (incomplete)
2707                 goto start_again;
2708
2709 send_done:
2710         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2711         if (!nlh) {
2712                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2713                 if (err)
2714                         return err;
2715                 goto send_done;
2716         }
2717
2718         return send_func(skb, team, portid);
2719
2720 nla_put_failure:
2721         err = -EMSGSIZE;
2722 errout:
2723         nlmsg_free(skb);
2724         return err;
2725 }
2726
2727 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2728                                      struct genl_info *info)
2729 {
2730         struct team *team;
2731         int err;
2732
2733         team = team_nl_team_get(info);
2734         if (!team)
2735                 return -EINVAL;
2736
2737         err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2738                                          NLM_F_ACK, team_nl_send_unicast, NULL);
2739
2740         team_nl_team_put(team);
2741
2742         return err;
2743 }
2744
2745 static const struct genl_ops team_nl_ops[] = {
2746         {
2747                 .cmd = TEAM_CMD_NOOP,
2748                 .doit = team_nl_cmd_noop,
2749                 .policy = team_nl_policy,
2750         },
2751         {
2752                 .cmd = TEAM_CMD_OPTIONS_SET,
2753                 .doit = team_nl_cmd_options_set,
2754                 .policy = team_nl_policy,
2755                 .flags = GENL_ADMIN_PERM,
2756         },
2757         {
2758                 .cmd = TEAM_CMD_OPTIONS_GET,
2759                 .doit = team_nl_cmd_options_get,
2760                 .policy = team_nl_policy,
2761                 .flags = GENL_ADMIN_PERM,
2762         },
2763         {
2764                 .cmd = TEAM_CMD_PORT_LIST_GET,
2765                 .doit = team_nl_cmd_port_list_get,
2766                 .policy = team_nl_policy,
2767                 .flags = GENL_ADMIN_PERM,
2768         },
2769 };
2770
2771 static const struct genl_multicast_group team_nl_mcgrps[] = {
2772         { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2773 };
2774
2775 static struct genl_family team_nl_family __ro_after_init = {
2776         .name           = TEAM_GENL_NAME,
2777         .version        = TEAM_GENL_VERSION,
2778         .maxattr        = TEAM_ATTR_MAX,
2779         .netnsok        = true,
2780         .module         = THIS_MODULE,
2781         .ops            = team_nl_ops,
2782         .n_ops          = ARRAY_SIZE(team_nl_ops),
2783         .mcgrps         = team_nl_mcgrps,
2784         .n_mcgrps       = ARRAY_SIZE(team_nl_mcgrps),
2785 };
2786
2787 static int team_nl_send_multicast(struct sk_buff *skb,
2788                                   struct team *team, u32 portid)
2789 {
2790         return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2791                                        skb, 0, 0, GFP_KERNEL);
2792 }
2793
2794 static int team_nl_send_event_options_get(struct team *team,
2795                                           struct list_head *sel_opt_inst_list)
2796 {
2797         return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2798                                         sel_opt_inst_list);
2799 }
2800
2801 static int team_nl_send_event_port_get(struct team *team,
2802                                        struct team_port *port)
2803 {
2804         return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2805                                           port);
2806 }
2807
2808 static int __init team_nl_init(void)
2809 {
2810         return genl_register_family(&team_nl_family);
2811 }
2812
2813 static void team_nl_fini(void)
2814 {
2815         genl_unregister_family(&team_nl_family);
2816 }
2817
2818
2819 /******************
2820  * Change checkers
2821  ******************/
2822
2823 static void __team_options_change_check(struct team *team)
2824 {
2825         int err;
2826         struct team_option_inst *opt_inst;
2827         LIST_HEAD(sel_opt_inst_list);
2828
2829         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2830                 if (opt_inst->changed)
2831                         list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2832         }
2833         err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2834         if (err && err != -ESRCH)
2835                 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2836                             err);
2837 }
2838
2839 /* rtnl lock is held */
2840
2841 static void __team_port_change_send(struct team_port *port, bool linkup)
2842 {
2843         int err;
2844
2845         port->changed = true;
2846         port->state.linkup = linkup;
2847         team_refresh_port_linkup(port);
2848         if (linkup) {
2849                 struct ethtool_link_ksettings ecmd;
2850
2851                 err = __ethtool_get_link_ksettings(port->dev, &ecmd);
2852                 if (!err) {
2853                         port->state.speed = ecmd.base.speed;
2854                         port->state.duplex = ecmd.base.duplex;
2855                         goto send_event;
2856                 }
2857         }
2858         port->state.speed = 0;
2859         port->state.duplex = 0;
2860
2861 send_event:
2862         err = team_nl_send_event_port_get(port->team, port);
2863         if (err && err != -ESRCH)
2864                 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2865                             port->dev->name, err);
2866
2867 }
2868
2869 static void __team_carrier_check(struct team *team)
2870 {
2871         struct team_port *port;
2872         bool team_linkup;
2873
2874         if (team->user_carrier_enabled)
2875                 return;
2876
2877         team_linkup = false;
2878         list_for_each_entry(port, &team->port_list, list) {
2879                 if (port->linkup) {
2880                         team_linkup = true;
2881                         break;
2882                 }
2883         }
2884
2885         if (team_linkup)
2886                 netif_carrier_on(team->dev);
2887         else
2888                 netif_carrier_off(team->dev);
2889 }
2890
2891 static void __team_port_change_check(struct team_port *port, bool linkup)
2892 {
2893         if (port->state.linkup != linkup)
2894                 __team_port_change_send(port, linkup);
2895         __team_carrier_check(port->team);
2896 }
2897
2898 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2899 {
2900         __team_port_change_send(port, linkup);
2901         __team_carrier_check(port->team);
2902 }
2903
2904 static void __team_port_change_port_removed(struct team_port *port)
2905 {
2906         port->removed = true;
2907         __team_port_change_send(port, false);
2908         __team_carrier_check(port->team);
2909 }
2910
2911 static void team_port_change_check(struct team_port *port, bool linkup)
2912 {
2913         struct team *team = port->team;
2914
2915         mutex_lock(&team->lock);
2916         __team_port_change_check(port, linkup);
2917         mutex_unlock(&team->lock);
2918 }
2919
2920
2921 /************************************
2922  * Net device notifier event handler
2923  ************************************/
2924
2925 static int team_device_event(struct notifier_block *unused,
2926                              unsigned long event, void *ptr)
2927 {
2928         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2929         struct team_port *port;
2930
2931         port = team_port_get_rtnl(dev);
2932         if (!port)
2933                 return NOTIFY_DONE;
2934
2935         switch (event) {
2936         case NETDEV_UP:
2937                 if (netif_carrier_ok(dev))
2938                         team_port_change_check(port, true);
2939                 break;
2940         case NETDEV_DOWN:
2941                 team_port_change_check(port, false);
2942                 break;
2943         case NETDEV_CHANGE:
2944                 if (netif_running(port->dev))
2945                         team_port_change_check(port,
2946                                                !!netif_oper_up(port->dev));
2947                 break;
2948         case NETDEV_UNREGISTER:
2949                 team_del_slave(port->team->dev, dev);
2950                 break;
2951         case NETDEV_FEAT_CHANGE:
2952                 team_compute_features(port->team);
2953                 break;
2954         case NETDEV_PRECHANGEMTU:
2955                 /* Forbid to change mtu of underlaying device */
2956                 if (!port->team->port_mtu_change_allowed)
2957                         return NOTIFY_BAD;
2958                 break;
2959         case NETDEV_PRE_TYPE_CHANGE:
2960                 /* Forbid to change type of underlaying device */
2961                 return NOTIFY_BAD;
2962         case NETDEV_RESEND_IGMP:
2963                 /* Propagate to master device */
2964                 call_netdevice_notifiers(event, port->team->dev);
2965                 break;
2966         }
2967         return NOTIFY_DONE;
2968 }
2969
2970 static struct notifier_block team_notifier_block __read_mostly = {
2971         .notifier_call = team_device_event,
2972 };
2973
2974
2975 /***********************
2976  * Module init and exit
2977  ***********************/
2978
2979 static int __init team_module_init(void)
2980 {
2981         int err;
2982
2983         register_netdevice_notifier(&team_notifier_block);
2984
2985         err = rtnl_link_register(&team_link_ops);
2986         if (err)
2987                 goto err_rtnl_reg;
2988
2989         err = team_nl_init();
2990         if (err)
2991                 goto err_nl_init;
2992
2993         return 0;
2994
2995 err_nl_init:
2996         rtnl_link_unregister(&team_link_ops);
2997
2998 err_rtnl_reg:
2999         unregister_netdevice_notifier(&team_notifier_block);
3000
3001         return err;
3002 }
3003
3004 static void __exit team_module_exit(void)
3005 {
3006         team_nl_fini();
3007         rtnl_link_unregister(&team_link_ops);
3008         unregister_netdevice_notifier(&team_notifier_block);
3009 }
3010
3011 module_init(team_module_init);
3012 module_exit(team_module_exit);
3013
3014 MODULE_LICENSE("GPL v2");
3015 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
3016 MODULE_DESCRIPTION("Ethernet team device driver");
3017 MODULE_ALIAS_RTNL_LINK(DRV_NAME);