Version:  2.0.40 2.2.26 2.4.37 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1

Linux/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_rcu(const struct net_device *dev)
 45 {
 46         return rcu_dereference(dev->rx_handler_data);
 47 }
 48 
 49 static struct team_port *team_port_get_rtnl(const struct net_device *dev)
 50 {
 51         struct team_port *port = rtnl_dereference(dev->rx_handler_data);
 52 
 53         return team_port_exists(dev) ? port : NULL;
 54 }
 55 
 56 /*
 57  * Since the ability to change device address for open port device is tested in
 58  * team_port_add, this function can be called without control of return value
 59  */
 60 static int __set_port_dev_addr(struct net_device *port_dev,
 61                                const unsigned char *dev_addr)
 62 {
 63         struct sockaddr addr;
 64 
 65         memcpy(addr.sa_data, dev_addr, port_dev->addr_len);
 66         addr.sa_family = port_dev->type;
 67         return dev_set_mac_address(port_dev, &addr);
 68 }
 69 
 70 static int team_port_set_orig_dev_addr(struct team_port *port)
 71 {
 72         return __set_port_dev_addr(port->dev, port->orig.dev_addr);
 73 }
 74 
 75 static int team_port_set_team_dev_addr(struct team *team,
 76                                        struct team_port *port)
 77 {
 78         return __set_port_dev_addr(port->dev, team->dev->dev_addr);
 79 }
 80 
 81 int team_modeop_port_enter(struct team *team, struct team_port *port)
 82 {
 83         return team_port_set_team_dev_addr(team, port);
 84 }
 85 EXPORT_SYMBOL(team_modeop_port_enter);
 86 
 87 void team_modeop_port_change_dev_addr(struct team *team,
 88                                       struct team_port *port)
 89 {
 90         team_port_set_team_dev_addr(team, port);
 91 }
 92 EXPORT_SYMBOL(team_modeop_port_change_dev_addr);
 93 
 94 static void team_refresh_port_linkup(struct team_port *port)
 95 {
 96         port->linkup = port->user.linkup_enabled ? port->user.linkup :
 97                                                    port->state.linkup;
 98 }
 99 
100 
101 /*******************
102  * Options handling
103  *******************/
104 
105 struct team_option_inst { /* One for each option instance */
106         struct list_head list;
107         struct list_head tmp_list;
108         struct team_option *option;
109         struct team_option_inst_info info;
110         bool changed;
111         bool removed;
112 };
113 
114 static struct team_option *__team_find_option(struct team *team,
115                                               const char *opt_name)
116 {
117         struct team_option *option;
118 
119         list_for_each_entry(option, &team->option_list, list) {
120                 if (strcmp(option->name, opt_name) == 0)
121                         return option;
122         }
123         return NULL;
124 }
125 
126 static void __team_option_inst_del(struct team_option_inst *opt_inst)
127 {
128         list_del(&opt_inst->list);
129         kfree(opt_inst);
130 }
131 
132 static void __team_option_inst_del_option(struct team *team,
133                                           struct team_option *option)
134 {
135         struct team_option_inst *opt_inst, *tmp;
136 
137         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
138                 if (opt_inst->option == option)
139                         __team_option_inst_del(opt_inst);
140         }
141 }
142 
143 static int __team_option_inst_add(struct team *team, struct team_option *option,
144                                   struct team_port *port)
145 {
146         struct team_option_inst *opt_inst;
147         unsigned int array_size;
148         unsigned int i;
149         int err;
150 
151         array_size = option->array_size;
152         if (!array_size)
153                 array_size = 1; /* No array but still need one instance */
154 
155         for (i = 0; i < array_size; i++) {
156                 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL);
157                 if (!opt_inst)
158                         return -ENOMEM;
159                 opt_inst->option = option;
160                 opt_inst->info.port = port;
161                 opt_inst->info.array_index = i;
162                 opt_inst->changed = true;
163                 opt_inst->removed = false;
164                 list_add_tail(&opt_inst->list, &team->option_inst_list);
165                 if (option->init) {
166                         err = option->init(team, &opt_inst->info);
167                         if (err)
168                                 return err;
169                 }
170 
171         }
172         return 0;
173 }
174 
175 static int __team_option_inst_add_option(struct team *team,
176                                          struct team_option *option)
177 {
178         int err;
179 
180         if (!option->per_port) {
181                 err = __team_option_inst_add(team, option, NULL);
182                 if (err)
183                         goto inst_del_option;
184         }
185         return 0;
186 
187 inst_del_option:
188         __team_option_inst_del_option(team, option);
189         return err;
190 }
191 
192 static void __team_option_inst_mark_removed_option(struct team *team,
193                                                    struct team_option *option)
194 {
195         struct team_option_inst *opt_inst;
196 
197         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
198                 if (opt_inst->option == option) {
199                         opt_inst->changed = true;
200                         opt_inst->removed = true;
201                 }
202         }
203 }
204 
205 static void __team_option_inst_del_port(struct team *team,
206                                         struct team_port *port)
207 {
208         struct team_option_inst *opt_inst, *tmp;
209 
210         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
211                 if (opt_inst->option->per_port &&
212                     opt_inst->info.port == port)
213                         __team_option_inst_del(opt_inst);
214         }
215 }
216 
217 static int __team_option_inst_add_port(struct team *team,
218                                        struct team_port *port)
219 {
220         struct team_option *option;
221         int err;
222 
223         list_for_each_entry(option, &team->option_list, list) {
224                 if (!option->per_port)
225                         continue;
226                 err = __team_option_inst_add(team, option, port);
227                 if (err)
228                         goto inst_del_port;
229         }
230         return 0;
231 
232 inst_del_port:
233         __team_option_inst_del_port(team, port);
234         return err;
235 }
236 
237 static void __team_option_inst_mark_removed_port(struct team *team,
238                                                  struct team_port *port)
239 {
240         struct team_option_inst *opt_inst;
241 
242         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
243                 if (opt_inst->info.port == port) {
244                         opt_inst->changed = true;
245                         opt_inst->removed = true;
246                 }
247         }
248 }
249 
250 static int __team_options_register(struct team *team,
251                                    const struct team_option *option,
252                                    size_t option_count)
253 {
254         int i;
255         struct team_option **dst_opts;
256         int err;
257 
258         dst_opts = kzalloc(sizeof(struct team_option *) * option_count,
259                            GFP_KERNEL);
260         if (!dst_opts)
261                 return -ENOMEM;
262         for (i = 0; i < option_count; i++, option++) {
263                 if (__team_find_option(team, option->name)) {
264                         err = -EEXIST;
265                         goto alloc_rollback;
266                 }
267                 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
268                 if (!dst_opts[i]) {
269                         err = -ENOMEM;
270                         goto alloc_rollback;
271                 }
272         }
273 
274         for (i = 0; i < option_count; i++) {
275                 err = __team_option_inst_add_option(team, dst_opts[i]);
276                 if (err)
277                         goto inst_rollback;
278                 list_add_tail(&dst_opts[i]->list, &team->option_list);
279         }
280 
281         kfree(dst_opts);
282         return 0;
283 
284 inst_rollback:
285         for (i--; i >= 0; i--)
286                 __team_option_inst_del_option(team, dst_opts[i]);
287 
288         i = option_count - 1;
289 alloc_rollback:
290         for (i--; i >= 0; i--)
291                 kfree(dst_opts[i]);
292 
293         kfree(dst_opts);
294         return err;
295 }
296 
297 static void __team_options_mark_removed(struct team *team,
298                                         const struct team_option *option,
299                                         size_t option_count)
300 {
301         int i;
302 
303         for (i = 0; i < option_count; i++, option++) {
304                 struct team_option *del_opt;
305 
306                 del_opt = __team_find_option(team, option->name);
307                 if (del_opt)
308                         __team_option_inst_mark_removed_option(team, del_opt);
309         }
310 }
311 
312 static void __team_options_unregister(struct team *team,
313                                       const struct team_option *option,
314                                       size_t option_count)
315 {
316         int i;
317 
318         for (i = 0; i < option_count; i++, option++) {
319                 struct team_option *del_opt;
320 
321                 del_opt = __team_find_option(team, option->name);
322                 if (del_opt) {
323                         __team_option_inst_del_option(team, del_opt);
324                         list_del(&del_opt->list);
325                         kfree(del_opt);
326                 }
327         }
328 }
329 
330 static void __team_options_change_check(struct team *team);
331 
332 int team_options_register(struct team *team,
333                           const struct team_option *option,
334                           size_t option_count)
335 {
336         int err;
337 
338         err = __team_options_register(team, option, option_count);
339         if (err)
340                 return err;
341         __team_options_change_check(team);
342         return 0;
343 }
344 EXPORT_SYMBOL(team_options_register);
345 
346 void team_options_unregister(struct team *team,
347                              const struct team_option *option,
348                              size_t option_count)
349 {
350         __team_options_mark_removed(team, option, option_count);
351         __team_options_change_check(team);
352         __team_options_unregister(team, option, option_count);
353 }
354 EXPORT_SYMBOL(team_options_unregister);
355 
356 static int team_option_get(struct team *team,
357                            struct team_option_inst *opt_inst,
358                            struct team_gsetter_ctx *ctx)
359 {
360         if (!opt_inst->option->getter)
361                 return -EOPNOTSUPP;
362         return opt_inst->option->getter(team, ctx);
363 }
364 
365 static int team_option_set(struct team *team,
366                            struct team_option_inst *opt_inst,
367                            struct team_gsetter_ctx *ctx)
368 {
369         if (!opt_inst->option->setter)
370                 return -EOPNOTSUPP;
371         return opt_inst->option->setter(team, ctx);
372 }
373 
374 void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info)
375 {
376         struct team_option_inst *opt_inst;
377 
378         opt_inst = container_of(opt_inst_info, struct team_option_inst, info);
379         opt_inst->changed = true;
380 }
381 EXPORT_SYMBOL(team_option_inst_set_change);
382 
383 void team_options_change_check(struct team *team)
384 {
385         __team_options_change_check(team);
386 }
387 EXPORT_SYMBOL(team_options_change_check);
388 
389 
390 /****************
391  * Mode handling
392  ****************/
393 
394 static LIST_HEAD(mode_list);
395 static DEFINE_SPINLOCK(mode_list_lock);
396 
397 struct team_mode_item {
398         struct list_head list;
399         const struct team_mode *mode;
400 };
401 
402 static struct team_mode_item *__find_mode(const char *kind)
403 {
404         struct team_mode_item *mitem;
405 
406         list_for_each_entry(mitem, &mode_list, list) {
407                 if (strcmp(mitem->mode->kind, kind) == 0)
408                         return mitem;
409         }
410         return NULL;
411 }
412 
413 static bool is_good_mode_name(const char *name)
414 {
415         while (*name != '\0') {
416                 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
417                         return false;
418                 name++;
419         }
420         return true;
421 }
422 
423 int team_mode_register(const struct team_mode *mode)
424 {
425         int err = 0;
426         struct team_mode_item *mitem;
427 
428         if (!is_good_mode_name(mode->kind) ||
429             mode->priv_size > TEAM_MODE_PRIV_SIZE)
430                 return -EINVAL;
431 
432         mitem = kmalloc(sizeof(*mitem), GFP_KERNEL);
433         if (!mitem)
434                 return -ENOMEM;
435 
436         spin_lock(&mode_list_lock);
437         if (__find_mode(mode->kind)) {
438                 err = -EEXIST;
439                 kfree(mitem);
440                 goto unlock;
441         }
442         mitem->mode = mode;
443         list_add_tail(&mitem->list, &mode_list);
444 unlock:
445         spin_unlock(&mode_list_lock);
446         return err;
447 }
448 EXPORT_SYMBOL(team_mode_register);
449 
450 void team_mode_unregister(const struct team_mode *mode)
451 {
452         struct team_mode_item *mitem;
453 
454         spin_lock(&mode_list_lock);
455         mitem = __find_mode(mode->kind);
456         if (mitem) {
457                 list_del_init(&mitem->list);
458                 kfree(mitem);
459         }
460         spin_unlock(&mode_list_lock);
461 }
462 EXPORT_SYMBOL(team_mode_unregister);
463 
464 static const struct team_mode *team_mode_get(const char *kind)
465 {
466         struct team_mode_item *mitem;
467         const struct team_mode *mode = NULL;
468 
469         spin_lock(&mode_list_lock);
470         mitem = __find_mode(kind);
471         if (!mitem) {
472                 spin_unlock(&mode_list_lock);
473                 request_module("team-mode-%s", kind);
474                 spin_lock(&mode_list_lock);
475                 mitem = __find_mode(kind);
476         }
477         if (mitem) {
478                 mode = mitem->mode;
479                 if (!try_module_get(mode->owner))
480                         mode = NULL;
481         }
482 
483         spin_unlock(&mode_list_lock);
484         return mode;
485 }
486 
487 static void team_mode_put(const struct team_mode *mode)
488 {
489         module_put(mode->owner);
490 }
491 
492 static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
493 {
494         dev_kfree_skb_any(skb);
495         return false;
496 }
497 
498 static rx_handler_result_t team_dummy_receive(struct team *team,
499                                               struct team_port *port,
500                                               struct sk_buff *skb)
501 {
502         return RX_HANDLER_ANOTHER;
503 }
504 
505 static const struct team_mode __team_no_mode = {
506         .kind           = "*NOMODE*",
507 };
508 
509 static bool team_is_mode_set(struct team *team)
510 {
511         return team->mode != &__team_no_mode;
512 }
513 
514 static void team_set_no_mode(struct team *team)
515 {
516         team->user_carrier_enabled = false;
517         team->mode = &__team_no_mode;
518 }
519 
520 static void team_adjust_ops(struct team *team)
521 {
522         /*
523          * To avoid checks in rx/tx skb paths, ensure here that non-null and
524          * correct ops are always set.
525          */
526 
527         if (!team->en_port_count || !team_is_mode_set(team) ||
528             !team->mode->ops->transmit)
529                 team->ops.transmit = team_dummy_transmit;
530         else
531                 team->ops.transmit = team->mode->ops->transmit;
532 
533         if (!team->en_port_count || !team_is_mode_set(team) ||
534             !team->mode->ops->receive)
535                 team->ops.receive = team_dummy_receive;
536         else
537                 team->ops.receive = team->mode->ops->receive;
538 }
539 
540 /*
541  * We can benefit from the fact that it's ensured no port is present
542  * at the time of mode change. Therefore no packets are in fly so there's no
543  * need to set mode operations in any special way.
544  */
545 static int __team_change_mode(struct team *team,
546                               const struct team_mode *new_mode)
547 {
548         /* Check if mode was previously set and do cleanup if so */
549         if (team_is_mode_set(team)) {
550                 void (*exit_op)(struct team *team) = team->ops.exit;
551 
552                 /* Clear ops area so no callback is called any longer */
553                 memset(&team->ops, 0, sizeof(struct team_mode_ops));
554                 team_adjust_ops(team);
555 
556                 if (exit_op)
557                         exit_op(team);
558                 team_mode_put(team->mode);
559                 team_set_no_mode(team);
560                 /* zero private data area */
561                 memset(&team->mode_priv, 0,
562                        sizeof(struct team) - offsetof(struct team, mode_priv));
563         }
564 
565         if (!new_mode)
566                 return 0;
567 
568         if (new_mode->ops->init) {
569                 int err;
570 
571                 err = new_mode->ops->init(team);
572                 if (err)
573                         return err;
574         }
575 
576         team->mode = new_mode;
577         memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
578         team_adjust_ops(team);
579 
580         return 0;
581 }
582 
583 static int team_change_mode(struct team *team, const char *kind)
584 {
585         const struct team_mode *new_mode;
586         struct net_device *dev = team->dev;
587         int err;
588 
589         if (!list_empty(&team->port_list)) {
590                 netdev_err(dev, "No ports can be present during mode change\n");
591                 return -EBUSY;
592         }
593 
594         if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) {
595                 netdev_err(dev, "Unable to change to the same mode the team is in\n");
596                 return -EINVAL;
597         }
598 
599         new_mode = team_mode_get(kind);
600         if (!new_mode) {
601                 netdev_err(dev, "Mode \"%s\" not found\n", kind);
602                 return -EINVAL;
603         }
604 
605         err = __team_change_mode(team, new_mode);
606         if (err) {
607                 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
608                 team_mode_put(new_mode);
609                 return err;
610         }
611 
612         netdev_info(dev, "Mode changed to \"%s\"\n", kind);
613         return 0;
614 }
615 
616 
617 /*********************
618  * Peers notification
619  *********************/
620 
621 static void team_notify_peers_work(struct work_struct *work)
622 {
623         struct team *team;
624         int val;
625 
626         team = container_of(work, struct team, notify_peers.dw.work);
627 
628         if (!rtnl_trylock()) {
629                 schedule_delayed_work(&team->notify_peers.dw, 0);
630                 return;
631         }
632         val = atomic_dec_if_positive(&team->notify_peers.count_pending);
633         if (val < 0) {
634                 rtnl_unlock();
635                 return;
636         }
637         call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, team->dev);
638         rtnl_unlock();
639         if (val)
640                 schedule_delayed_work(&team->notify_peers.dw,
641                                       msecs_to_jiffies(team->notify_peers.interval));
642 }
643 
644 static void team_notify_peers(struct team *team)
645 {
646         if (!team->notify_peers.count || !netif_running(team->dev))
647                 return;
648         atomic_add(team->notify_peers.count, &team->notify_peers.count_pending);
649         schedule_delayed_work(&team->notify_peers.dw, 0);
650 }
651 
652 static void team_notify_peers_init(struct team *team)
653 {
654         INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work);
655 }
656 
657 static void team_notify_peers_fini(struct team *team)
658 {
659         cancel_delayed_work_sync(&team->notify_peers.dw);
660 }
661 
662 
663 /*******************************
664  * Send multicast group rejoins
665  *******************************/
666 
667 static void team_mcast_rejoin_work(struct work_struct *work)
668 {
669         struct team *team;
670         int val;
671 
672         team = container_of(work, struct team, mcast_rejoin.dw.work);
673 
674         if (!rtnl_trylock()) {
675                 schedule_delayed_work(&team->mcast_rejoin.dw, 0);
676                 return;
677         }
678         val = atomic_dec_if_positive(&team->mcast_rejoin.count_pending);
679         if (val < 0) {
680                 rtnl_unlock();
681                 return;
682         }
683         call_netdevice_notifiers(NETDEV_RESEND_IGMP, team->dev);
684         rtnl_unlock();
685         if (val)
686                 schedule_delayed_work(&team->mcast_rejoin.dw,
687                                       msecs_to_jiffies(team->mcast_rejoin.interval));
688 }
689 
690 static void team_mcast_rejoin(struct team *team)
691 {
692         if (!team->mcast_rejoin.count || !netif_running(team->dev))
693                 return;
694         atomic_add(team->mcast_rejoin.count, &team->mcast_rejoin.count_pending);
695         schedule_delayed_work(&team->mcast_rejoin.dw, 0);
696 }
697 
698 static void team_mcast_rejoin_init(struct team *team)
699 {
700         INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work);
701 }
702 
703 static void team_mcast_rejoin_fini(struct team *team)
704 {
705         cancel_delayed_work_sync(&team->mcast_rejoin.dw);
706 }
707 
708 
709 /************************
710  * Rx path frame handler
711  ************************/
712 
713 /* note: already called with rcu_read_lock */
714 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
715 {
716         struct sk_buff *skb = *pskb;
717         struct team_port *port;
718         struct team *team;
719         rx_handler_result_t res;
720 
721         skb = skb_share_check(skb, GFP_ATOMIC);
722         if (!skb)
723                 return RX_HANDLER_CONSUMED;
724 
725         *pskb = skb;
726 
727         port = team_port_get_rcu(skb->dev);
728         team = port->team;
729         if (!team_port_enabled(port)) {
730                 /* allow exact match delivery for disabled ports */
731                 res = RX_HANDLER_EXACT;
732         } else {
733                 res = team->ops.receive(team, port, skb);
734         }
735         if (res == RX_HANDLER_ANOTHER) {
736                 struct team_pcpu_stats *pcpu_stats;
737 
738                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
739                 u64_stats_update_begin(&pcpu_stats->syncp);
740                 pcpu_stats->rx_packets++;
741                 pcpu_stats->rx_bytes += skb->len;
742                 if (skb->pkt_type == PACKET_MULTICAST)
743                         pcpu_stats->rx_multicast++;
744                 u64_stats_update_end(&pcpu_stats->syncp);
745 
746                 skb->dev = team->dev;
747         } else {
748                 this_cpu_inc(team->pcpu_stats->rx_dropped);
749         }
750 
751         return res;
752 }
753 
754 
755 /*************************************
756  * Multiqueue Tx port select override
757  *************************************/
758 
759 static int team_queue_override_init(struct team *team)
760 {
761         struct list_head *listarr;
762         unsigned int queue_cnt = team->dev->num_tx_queues - 1;
763         unsigned int i;
764 
765         if (!queue_cnt)
766                 return 0;
767         listarr = kmalloc(sizeof(struct list_head) * queue_cnt, GFP_KERNEL);
768         if (!listarr)
769                 return -ENOMEM;
770         team->qom_lists = listarr;
771         for (i = 0; i < queue_cnt; i++)
772                 INIT_LIST_HEAD(listarr++);
773         return 0;
774 }
775 
776 static void team_queue_override_fini(struct team *team)
777 {
778         kfree(team->qom_lists);
779 }
780 
781 static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
782 {
783         return &team->qom_lists[queue_id - 1];
784 }
785 
786 /*
787  * note: already called with rcu_read_lock
788  */
789 static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
790 {
791         struct list_head *qom_list;
792         struct team_port *port;
793 
794         if (!team->queue_override_enabled || !skb->queue_mapping)
795                 return false;
796         qom_list = __team_get_qom_list(team, skb->queue_mapping);
797         list_for_each_entry_rcu(port, qom_list, qom_list) {
798                 if (!team_dev_queue_xmit(team, port, skb))
799                         return true;
800         }
801         return false;
802 }
803 
804 static void __team_queue_override_port_del(struct team *team,
805                                            struct team_port *port)
806 {
807         if (!port->queue_id)
808                 return;
809         list_del_rcu(&port->qom_list);
810 }
811 
812 static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
813                                                       struct team_port *cur)
814 {
815         if (port->priority < cur->priority)
816                 return true;
817         if (port->priority > cur->priority)
818                 return false;
819         if (port->index < cur->index)
820                 return true;
821         return false;
822 }
823 
824 static void __team_queue_override_port_add(struct team *team,
825                                            struct team_port *port)
826 {
827         struct team_port *cur;
828         struct list_head *qom_list;
829         struct list_head *node;
830 
831         if (!port->queue_id)
832                 return;
833         qom_list = __team_get_qom_list(team, port->queue_id);
834         node = qom_list;
835         list_for_each_entry(cur, qom_list, qom_list) {
836                 if (team_queue_override_port_has_gt_prio_than(port, cur))
837                         break;
838                 node = &cur->qom_list;
839         }
840         list_add_tail_rcu(&port->qom_list, node);
841 }
842 
843 static void __team_queue_override_enabled_check(struct team *team)
844 {
845         struct team_port *port;
846         bool enabled = false;
847 
848         list_for_each_entry(port, &team->port_list, list) {
849                 if (port->queue_id) {
850                         enabled = true;
851                         break;
852                 }
853         }
854         if (enabled == team->queue_override_enabled)
855                 return;
856         netdev_dbg(team->dev, "%s queue override\n",
857                    enabled ? "Enabling" : "Disabling");
858         team->queue_override_enabled = enabled;
859 }
860 
861 static void team_queue_override_port_prio_changed(struct team *team,
862                                                   struct team_port *port)
863 {
864         if (!port->queue_id || team_port_enabled(port))
865                 return;
866         __team_queue_override_port_del(team, port);
867         __team_queue_override_port_add(team, port);
868         __team_queue_override_enabled_check(team);
869 }
870 
871 static void team_queue_override_port_change_queue_id(struct team *team,
872                                                      struct team_port *port,
873                                                      u16 new_queue_id)
874 {
875         if (team_port_enabled(port)) {
876                 __team_queue_override_port_del(team, port);
877                 port->queue_id = new_queue_id;
878                 __team_queue_override_port_add(team, port);
879                 __team_queue_override_enabled_check(team);
880         } else {
881                 port->queue_id = new_queue_id;
882         }
883 }
884 
885 static void team_queue_override_port_add(struct team *team,
886                                          struct team_port *port)
887 {
888         __team_queue_override_port_add(team, port);
889         __team_queue_override_enabled_check(team);
890 }
891 
892 static void team_queue_override_port_del(struct team *team,
893                                          struct team_port *port)
894 {
895         __team_queue_override_port_del(team, port);
896         __team_queue_override_enabled_check(team);
897 }
898 
899 
900 /****************
901  * Port handling
902  ****************/
903 
904 static bool team_port_find(const struct team *team,
905                            const struct team_port *port)
906 {
907         struct team_port *cur;
908 
909         list_for_each_entry(cur, &team->port_list, list)
910                 if (cur == port)
911                         return true;
912         return false;
913 }
914 
915 /*
916  * Enable/disable port by adding to enabled port hashlist and setting
917  * port->index (Might be racy so reader could see incorrect ifindex when
918  * processing a flying packet, but that is not a problem). Write guarded
919  * by team->lock.
920  */
921 static void team_port_enable(struct team *team,
922                              struct team_port *port)
923 {
924         if (team_port_enabled(port))
925                 return;
926         port->index = team->en_port_count++;
927         hlist_add_head_rcu(&port->hlist,
928                            team_port_index_hash(team, port->index));
929         team_adjust_ops(team);
930         team_queue_override_port_add(team, port);
931         if (team->ops.port_enabled)
932                 team->ops.port_enabled(team, port);
933         team_notify_peers(team);
934         team_mcast_rejoin(team);
935 }
936 
937 static void __reconstruct_port_hlist(struct team *team, int rm_index)
938 {
939         int i;
940         struct team_port *port;
941 
942         for (i = rm_index + 1; i < team->en_port_count; i++) {
943                 port = team_get_port_by_index(team, i);
944                 hlist_del_rcu(&port->hlist);
945                 port->index--;
946                 hlist_add_head_rcu(&port->hlist,
947                                    team_port_index_hash(team, port->index));
948         }
949 }
950 
951 static void team_port_disable(struct team *team,
952                               struct team_port *port)
953 {
954         if (!team_port_enabled(port))
955                 return;
956         if (team->ops.port_disabled)
957                 team->ops.port_disabled(team, port);
958         hlist_del_rcu(&port->hlist);
959         __reconstruct_port_hlist(team, port->index);
960         port->index = -1;
961         team->en_port_count--;
962         team_queue_override_port_del(team, port);
963         team_adjust_ops(team);
964         team_notify_peers(team);
965         team_mcast_rejoin(team);
966 }
967 
968 #define TEAM_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \
969                             NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
970                             NETIF_F_HIGHDMA | NETIF_F_LRO)
971 
972 static void __team_compute_features(struct team *team)
973 {
974         struct team_port *port;
975         u32 vlan_features = TEAM_VLAN_FEATURES & NETIF_F_ALL_FOR_ALL;
976         unsigned short max_hard_header_len = ETH_HLEN;
977         unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE |
978                                         IFF_XMIT_DST_RELEASE_PERM;
979 
980         list_for_each_entry(port, &team->port_list, list) {
981                 vlan_features = netdev_increment_features(vlan_features,
982                                         port->dev->vlan_features,
983                                         TEAM_VLAN_FEATURES);
984 
985                 dst_release_flag &= port->dev->priv_flags;
986                 if (port->dev->hard_header_len > max_hard_header_len)
987                         max_hard_header_len = port->dev->hard_header_len;
988         }
989 
990         team->dev->vlan_features = vlan_features;
991         team->dev->hard_header_len = max_hard_header_len;
992 
993         team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
994         if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
995                 team->dev->priv_flags |= IFF_XMIT_DST_RELEASE;
996 
997         netdev_change_features(team->dev);
998 }
999 
1000 static void team_compute_features(struct team *team)
1001 {
1002         mutex_lock(&team->lock);
1003         __team_compute_features(team);
1004         mutex_unlock(&team->lock);
1005 }
1006 
1007 static int team_port_enter(struct team *team, struct team_port *port)
1008 {
1009         int err = 0;
1010 
1011         dev_hold(team->dev);
1012         if (team->ops.port_enter) {
1013                 err = team->ops.port_enter(team, port);
1014                 if (err) {
1015                         netdev_err(team->dev, "Device %s failed to enter team mode\n",
1016                                    port->dev->name);
1017                         goto err_port_enter;
1018                 }
1019         }
1020 
1021         return 0;
1022 
1023 err_port_enter:
1024         dev_put(team->dev);
1025 
1026         return err;
1027 }
1028 
1029 static void team_port_leave(struct team *team, struct team_port *port)
1030 {
1031         if (team->ops.port_leave)
1032                 team->ops.port_leave(team, port);
1033         dev_put(team->dev);
1034 }
1035 
1036 #ifdef CONFIG_NET_POLL_CONTROLLER
1037 static int team_port_enable_netpoll(struct team *team, struct team_port *port)
1038 {
1039         struct netpoll *np;
1040         int err;
1041 
1042         if (!team->dev->npinfo)
1043                 return 0;
1044 
1045         np = kzalloc(sizeof(*np), GFP_KERNEL);
1046         if (!np)
1047                 return -ENOMEM;
1048 
1049         err = __netpoll_setup(np, port->dev);
1050         if (err) {
1051                 kfree(np);
1052                 return err;
1053         }
1054         port->np = np;
1055         return err;
1056 }
1057 
1058 static void team_port_disable_netpoll(struct team_port *port)
1059 {
1060         struct netpoll *np = port->np;
1061 
1062         if (!np)
1063                 return;
1064         port->np = NULL;
1065 
1066         /* Wait for transmitting packets to finish before freeing. */
1067         synchronize_rcu_bh();
1068         __netpoll_cleanup(np);
1069         kfree(np);
1070 }
1071 #else
1072 static int team_port_enable_netpoll(struct team *team, struct team_port *port)
1073 {
1074         return 0;
1075 }
1076 static void team_port_disable_netpoll(struct team_port *port)
1077 {
1078 }
1079 #endif
1080 
1081 static int team_upper_dev_link(struct net_device *dev,
1082                                struct net_device *port_dev)
1083 {
1084         int err;
1085 
1086         err = netdev_master_upper_dev_link(port_dev, dev);
1087         if (err)
1088                 return err;
1089         port_dev->priv_flags |= IFF_TEAM_PORT;
1090         return 0;
1091 }
1092 
1093 static void team_upper_dev_unlink(struct net_device *dev,
1094                                   struct net_device *port_dev)
1095 {
1096         netdev_upper_dev_unlink(port_dev, dev);
1097         port_dev->priv_flags &= ~IFF_TEAM_PORT;
1098 }
1099 
1100 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1101 static int team_dev_type_check_change(struct net_device *dev,
1102                                       struct net_device *port_dev);
1103 
1104 static int team_port_add(struct team *team, struct net_device *port_dev)
1105 {
1106         struct net_device *dev = team->dev;
1107         struct team_port *port;
1108         char *portname = port_dev->name;
1109         int err;
1110 
1111         if (port_dev->flags & IFF_LOOPBACK) {
1112                 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1113                            portname);
1114                 return -EINVAL;
1115         }
1116 
1117         if (team_port_exists(port_dev)) {
1118                 netdev_err(dev, "Device %s is already a port "
1119                                 "of a team device\n", portname);
1120                 return -EBUSY;
1121         }
1122 
1123         if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1124             vlan_uses_dev(dev)) {
1125                 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1126                            portname);
1127                 return -EPERM;
1128         }
1129 
1130         err = team_dev_type_check_change(dev, port_dev);
1131         if (err)
1132                 return err;
1133 
1134         if (port_dev->flags & IFF_UP) {
1135                 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1136                            portname);
1137                 return -EBUSY;
1138         }
1139 
1140         port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1141                        GFP_KERNEL);
1142         if (!port)
1143                 return -ENOMEM;
1144 
1145         port->dev = port_dev;
1146         port->team = team;
1147         INIT_LIST_HEAD(&port->qom_list);
1148 
1149         port->orig.mtu = port_dev->mtu;
1150         err = dev_set_mtu(port_dev, dev->mtu);
1151         if (err) {
1152                 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1153                 goto err_set_mtu;
1154         }
1155 
1156         memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1157 
1158         err = team_port_enter(team, port);
1159         if (err) {
1160                 netdev_err(dev, "Device %s failed to enter team mode\n",
1161                            portname);
1162                 goto err_port_enter;
1163         }
1164 
1165         err = dev_open(port_dev);
1166         if (err) {
1167                 netdev_dbg(dev, "Device %s opening failed\n",
1168                            portname);
1169                 goto err_dev_open;
1170         }
1171 
1172         err = vlan_vids_add_by_dev(port_dev, dev);
1173         if (err) {
1174                 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1175                                 portname);
1176                 goto err_vids_add;
1177         }
1178 
1179         err = team_port_enable_netpoll(team, port);
1180         if (err) {
1181                 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1182                            portname);
1183                 goto err_enable_netpoll;
1184         }
1185 
1186         if (!(dev->features & NETIF_F_LRO))
1187                 dev_disable_lro(port_dev);
1188 
1189         err = netdev_rx_handler_register(port_dev, team_handle_frame,
1190                                          port);
1191         if (err) {
1192                 netdev_err(dev, "Device %s failed to register rx_handler\n",
1193                            portname);
1194                 goto err_handler_register;
1195         }
1196 
1197         err = team_upper_dev_link(dev, port_dev);
1198         if (err) {
1199                 netdev_err(dev, "Device %s failed to set upper link\n",
1200                            portname);
1201                 goto err_set_upper_link;
1202         }
1203 
1204         err = __team_option_inst_add_port(team, port);
1205         if (err) {
1206                 netdev_err(dev, "Device %s failed to add per-port options\n",
1207                            portname);
1208                 goto err_option_port_add;
1209         }
1210 
1211         port->index = -1;
1212         list_add_tail_rcu(&port->list, &team->port_list);
1213         team_port_enable(team, port);
1214         __team_compute_features(team);
1215         __team_port_change_port_added(port, !!netif_carrier_ok(port_dev));
1216         __team_options_change_check(team);
1217 
1218         netdev_info(dev, "Port device %s added\n", portname);
1219 
1220         return 0;
1221 
1222 err_option_port_add:
1223         team_upper_dev_unlink(dev, port_dev);
1224 
1225 err_set_upper_link:
1226         netdev_rx_handler_unregister(port_dev);
1227 
1228 err_handler_register:
1229         team_port_disable_netpoll(port);
1230 
1231 err_enable_netpoll:
1232         vlan_vids_del_by_dev(port_dev, dev);
1233 
1234 err_vids_add:
1235         dev_close(port_dev);
1236 
1237 err_dev_open:
1238         team_port_leave(team, port);
1239         team_port_set_orig_dev_addr(port);
1240 
1241 err_port_enter:
1242         dev_set_mtu(port_dev, port->orig.mtu);
1243 
1244 err_set_mtu:
1245         kfree(port);
1246 
1247         return err;
1248 }
1249 
1250 static void __team_port_change_port_removed(struct team_port *port);
1251 
1252 static int team_port_del(struct team *team, struct net_device *port_dev)
1253 {
1254         struct net_device *dev = team->dev;
1255         struct team_port *port;
1256         char *portname = port_dev->name;
1257 
1258         port = team_port_get_rtnl(port_dev);
1259         if (!port || !team_port_find(team, port)) {
1260                 netdev_err(dev, "Device %s does not act as a port of this team\n",
1261                            portname);
1262                 return -ENOENT;
1263         }
1264 
1265         team_port_disable(team, port);
1266         list_del_rcu(&port->list);
1267         team_upper_dev_unlink(dev, port_dev);
1268         netdev_rx_handler_unregister(port_dev);
1269         team_port_disable_netpoll(port);
1270         vlan_vids_del_by_dev(port_dev, dev);
1271         dev_uc_unsync(port_dev, dev);
1272         dev_mc_unsync(port_dev, dev);
1273         dev_close(port_dev);
1274         team_port_leave(team, port);
1275 
1276         __team_option_inst_mark_removed_port(team, port);
1277         __team_options_change_check(team);
1278         __team_option_inst_del_port(team, port);
1279         __team_port_change_port_removed(port);
1280 
1281         team_port_set_orig_dev_addr(port);
1282         dev_set_mtu(port_dev, port->orig.mtu);
1283         kfree_rcu(port, rcu);
1284         netdev_info(dev, "Port device %s removed\n", portname);
1285         __team_compute_features(team);
1286 
1287         return 0;
1288 }
1289 
1290 
1291 /*****************
1292  * Net device ops
1293  *****************/
1294 
1295 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1296 {
1297         ctx->data.str_val = team->mode->kind;
1298         return 0;
1299 }
1300 
1301 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1302 {
1303         return team_change_mode(team, ctx->data.str_val);
1304 }
1305 
1306 static int team_notify_peers_count_get(struct team *team,
1307                                        struct team_gsetter_ctx *ctx)
1308 {
1309         ctx->data.u32_val = team->notify_peers.count;
1310         return 0;
1311 }
1312 
1313 static int team_notify_peers_count_set(struct team *team,
1314                                        struct team_gsetter_ctx *ctx)
1315 {
1316         team->notify_peers.count = ctx->data.u32_val;
1317         return 0;
1318 }
1319 
1320 static int team_notify_peers_interval_get(struct team *team,
1321                                           struct team_gsetter_ctx *ctx)
1322 {
1323         ctx->data.u32_val = team->notify_peers.interval;
1324         return 0;
1325 }
1326 
1327 static int team_notify_peers_interval_set(struct team *team,
1328                                           struct team_gsetter_ctx *ctx)
1329 {
1330         team->notify_peers.interval = ctx->data.u32_val;
1331         return 0;
1332 }
1333 
1334 static int team_mcast_rejoin_count_get(struct team *team,
1335                                        struct team_gsetter_ctx *ctx)
1336 {
1337         ctx->data.u32_val = team->mcast_rejoin.count;
1338         return 0;
1339 }
1340 
1341 static int team_mcast_rejoin_count_set(struct team *team,
1342                                        struct team_gsetter_ctx *ctx)
1343 {
1344         team->mcast_rejoin.count = ctx->data.u32_val;
1345         return 0;
1346 }
1347 
1348 static int team_mcast_rejoin_interval_get(struct team *team,
1349                                           struct team_gsetter_ctx *ctx)
1350 {
1351         ctx->data.u32_val = team->mcast_rejoin.interval;
1352         return 0;
1353 }
1354 
1355 static int team_mcast_rejoin_interval_set(struct team *team,
1356                                           struct team_gsetter_ctx *ctx)
1357 {
1358         team->mcast_rejoin.interval = ctx->data.u32_val;
1359         return 0;
1360 }
1361 
1362 static int team_port_en_option_get(struct team *team,
1363                                    struct team_gsetter_ctx *ctx)
1364 {
1365         struct team_port *port = ctx->info->port;
1366 
1367         ctx->data.bool_val = team_port_enabled(port);
1368         return 0;
1369 }
1370 
1371 static int team_port_en_option_set(struct team *team,
1372                                    struct team_gsetter_ctx *ctx)
1373 {
1374         struct team_port *port = ctx->info->port;
1375 
1376         if (ctx->data.bool_val)
1377                 team_port_enable(team, port);
1378         else
1379                 team_port_disable(team, port);
1380         return 0;
1381 }
1382 
1383 static int team_user_linkup_option_get(struct team *team,
1384                                        struct team_gsetter_ctx *ctx)
1385 {
1386         struct team_port *port = ctx->info->port;
1387 
1388         ctx->data.bool_val = port->user.linkup;
1389         return 0;
1390 }
1391 
1392 static void __team_carrier_check(struct team *team);
1393 
1394 static int team_user_linkup_option_set(struct team *team,
1395                                        struct team_gsetter_ctx *ctx)
1396 {
1397         struct team_port *port = ctx->info->port;
1398 
1399         port->user.linkup = ctx->data.bool_val;
1400         team_refresh_port_linkup(port);
1401         __team_carrier_check(port->team);
1402         return 0;
1403 }
1404 
1405 static int team_user_linkup_en_option_get(struct team *team,
1406                                           struct team_gsetter_ctx *ctx)
1407 {
1408         struct team_port *port = ctx->info->port;
1409 
1410         ctx->data.bool_val = port->user.linkup_enabled;
1411         return 0;
1412 }
1413 
1414 static int team_user_linkup_en_option_set(struct team *team,
1415                                           struct team_gsetter_ctx *ctx)
1416 {
1417         struct team_port *port = ctx->info->port;
1418 
1419         port->user.linkup_enabled = ctx->data.bool_val;
1420         team_refresh_port_linkup(port);
1421         __team_carrier_check(port->team);
1422         return 0;
1423 }
1424 
1425 static int team_priority_option_get(struct team *team,
1426                                     struct team_gsetter_ctx *ctx)
1427 {
1428         struct team_port *port = ctx->info->port;
1429 
1430         ctx->data.s32_val = port->priority;
1431         return 0;
1432 }
1433 
1434 static int team_priority_option_set(struct team *team,
1435                                     struct team_gsetter_ctx *ctx)
1436 {
1437         struct team_port *port = ctx->info->port;
1438         s32 priority = ctx->data.s32_val;
1439 
1440         if (port->priority == priority)
1441                 return 0;
1442         port->priority = priority;
1443         team_queue_override_port_prio_changed(team, port);
1444         return 0;
1445 }
1446 
1447 static int team_queue_id_option_get(struct team *team,
1448                                     struct team_gsetter_ctx *ctx)
1449 {
1450         struct team_port *port = ctx->info->port;
1451 
1452         ctx->data.u32_val = port->queue_id;
1453         return 0;
1454 }
1455 
1456 static int team_queue_id_option_set(struct team *team,
1457                                     struct team_gsetter_ctx *ctx)
1458 {
1459         struct team_port *port = ctx->info->port;
1460         u16 new_queue_id = ctx->data.u32_val;
1461 
1462         if (port->queue_id == new_queue_id)
1463                 return 0;
1464         if (new_queue_id >= team->dev->real_num_tx_queues)
1465                 return -EINVAL;
1466         team_queue_override_port_change_queue_id(team, port, new_queue_id);
1467         return 0;
1468 }
1469 
1470 static const struct team_option team_options[] = {
1471         {
1472                 .name = "mode",
1473                 .type = TEAM_OPTION_TYPE_STRING,
1474                 .getter = team_mode_option_get,
1475                 .setter = team_mode_option_set,
1476         },
1477         {
1478                 .name = "notify_peers_count",
1479                 .type = TEAM_OPTION_TYPE_U32,
1480                 .getter = team_notify_peers_count_get,
1481                 .setter = team_notify_peers_count_set,
1482         },
1483         {
1484                 .name = "notify_peers_interval",
1485                 .type = TEAM_OPTION_TYPE_U32,
1486                 .getter = team_notify_peers_interval_get,
1487                 .setter = team_notify_peers_interval_set,
1488         },
1489         {
1490                 .name = "mcast_rejoin_count",
1491                 .type = TEAM_OPTION_TYPE_U32,
1492                 .getter = team_mcast_rejoin_count_get,
1493                 .setter = team_mcast_rejoin_count_set,
1494         },
1495         {
1496                 .name = "mcast_rejoin_interval",
1497                 .type = TEAM_OPTION_TYPE_U32,
1498                 .getter = team_mcast_rejoin_interval_get,
1499                 .setter = team_mcast_rejoin_interval_set,
1500         },
1501         {
1502                 .name = "enabled",
1503                 .type = TEAM_OPTION_TYPE_BOOL,
1504                 .per_port = true,
1505                 .getter = team_port_en_option_get,
1506                 .setter = team_port_en_option_set,
1507         },
1508         {
1509                 .name = "user_linkup",
1510                 .type = TEAM_OPTION_TYPE_BOOL,
1511                 .per_port = true,
1512                 .getter = team_user_linkup_option_get,
1513                 .setter = team_user_linkup_option_set,
1514         },
1515         {
1516                 .name = "user_linkup_enabled",
1517                 .type = TEAM_OPTION_TYPE_BOOL,
1518                 .per_port = true,
1519                 .getter = team_user_linkup_en_option_get,
1520                 .setter = team_user_linkup_en_option_set,
1521         },
1522         {
1523                 .name = "priority",
1524                 .type = TEAM_OPTION_TYPE_S32,
1525                 .per_port = true,
1526                 .getter = team_priority_option_get,
1527                 .setter = team_priority_option_set,
1528         },
1529         {
1530                 .name = "queue_id",
1531                 .type = TEAM_OPTION_TYPE_U32,
1532                 .per_port = true,
1533                 .getter = team_queue_id_option_get,
1534                 .setter = team_queue_id_option_set,
1535         },
1536 };
1537 
1538 static struct lock_class_key team_netdev_xmit_lock_key;
1539 static struct lock_class_key team_netdev_addr_lock_key;
1540 static struct lock_class_key team_tx_busylock_key;
1541 
1542 static void team_set_lockdep_class_one(struct net_device *dev,
1543                                        struct netdev_queue *txq,
1544                                        void *unused)
1545 {
1546         lockdep_set_class(&txq->_xmit_lock, &team_netdev_xmit_lock_key);
1547 }
1548 
1549 static void team_set_lockdep_class(struct net_device *dev)
1550 {
1551         lockdep_set_class(&dev->addr_list_lock, &team_netdev_addr_lock_key);
1552         netdev_for_each_tx_queue(dev, team_set_lockdep_class_one, NULL);
1553         dev->qdisc_tx_busylock = &team_tx_busylock_key;
1554 }
1555 
1556 static int team_init(struct net_device *dev)
1557 {
1558         struct team *team = netdev_priv(dev);
1559         int i;
1560         int err;
1561 
1562         team->dev = dev;
1563         mutex_init(&team->lock);
1564         team_set_no_mode(team);
1565 
1566         team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1567         if (!team->pcpu_stats)
1568                 return -ENOMEM;
1569 
1570         for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1571                 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1572         INIT_LIST_HEAD(&team->port_list);
1573         err = team_queue_override_init(team);
1574         if (err)
1575                 goto err_team_queue_override_init;
1576 
1577         team_adjust_ops(team);
1578 
1579         INIT_LIST_HEAD(&team->option_list);
1580         INIT_LIST_HEAD(&team->option_inst_list);
1581 
1582         team_notify_peers_init(team);
1583         team_mcast_rejoin_init(team);
1584 
1585         err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1586         if (err)
1587                 goto err_options_register;
1588         netif_carrier_off(dev);
1589 
1590         team_set_lockdep_class(dev);
1591 
1592         return 0;
1593 
1594 err_options_register:
1595         team_mcast_rejoin_fini(team);
1596         team_notify_peers_fini(team);
1597         team_queue_override_fini(team);
1598 err_team_queue_override_init:
1599         free_percpu(team->pcpu_stats);
1600 
1601         return err;
1602 }
1603 
1604 static void team_uninit(struct net_device *dev)
1605 {
1606         struct team *team = netdev_priv(dev);
1607         struct team_port *port;
1608         struct team_port *tmp;
1609 
1610         mutex_lock(&team->lock);
1611         list_for_each_entry_safe(port, tmp, &team->port_list, list)
1612                 team_port_del(team, port->dev);
1613 
1614         __team_change_mode(team, NULL); /* cleanup */
1615         __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1616         team_mcast_rejoin_fini(team);
1617         team_notify_peers_fini(team);
1618         team_queue_override_fini(team);
1619         mutex_unlock(&team->lock);
1620 }
1621 
1622 static void team_destructor(struct net_device *dev)
1623 {
1624         struct team *team = netdev_priv(dev);
1625 
1626         free_percpu(team->pcpu_stats);
1627         free_netdev(dev);
1628 }
1629 
1630 static int team_open(struct net_device *dev)
1631 {
1632         return 0;
1633 }
1634 
1635 static int team_close(struct net_device *dev)
1636 {
1637         return 0;
1638 }
1639 
1640 /*
1641  * note: already called with rcu_read_lock
1642  */
1643 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1644 {
1645         struct team *team = netdev_priv(dev);
1646         bool tx_success;
1647         unsigned int len = skb->len;
1648 
1649         tx_success = team_queue_override_transmit(team, skb);
1650         if (!tx_success)
1651                 tx_success = team->ops.transmit(team, skb);
1652         if (tx_success) {
1653                 struct team_pcpu_stats *pcpu_stats;
1654 
1655                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1656                 u64_stats_update_begin(&pcpu_stats->syncp);
1657                 pcpu_stats->tx_packets++;
1658                 pcpu_stats->tx_bytes += len;
1659                 u64_stats_update_end(&pcpu_stats->syncp);
1660         } else {
1661                 this_cpu_inc(team->pcpu_stats->tx_dropped);
1662         }
1663 
1664         return NETDEV_TX_OK;
1665 }
1666 
1667 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1668                              void *accel_priv, select_queue_fallback_t fallback)
1669 {
1670         /*
1671          * This helper function exists to help dev_pick_tx get the correct
1672          * destination queue.  Using a helper function skips a call to
1673          * skb_tx_hash and will put the skbs in the queue we expect on their
1674          * way down to the team driver.
1675          */
1676         u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1677 
1678         /*
1679          * Save the original txq to restore before passing to the driver
1680          */
1681         qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1682 
1683         if (unlikely(txq >= dev->real_num_tx_queues)) {
1684                 do {
1685                         txq -= dev->real_num_tx_queues;
1686                 } while (txq >= dev->real_num_tx_queues);
1687         }
1688         return txq;
1689 }
1690 
1691 static void team_change_rx_flags(struct net_device *dev, int change)
1692 {
1693         struct team *team = netdev_priv(dev);
1694         struct team_port *port;
1695         int inc;
1696 
1697         rcu_read_lock();
1698         list_for_each_entry_rcu(port, &team->port_list, list) {
1699                 if (change & IFF_PROMISC) {
1700                         inc = dev->flags & IFF_PROMISC ? 1 : -1;
1701                         dev_set_promiscuity(port->dev, inc);
1702                 }
1703                 if (change & IFF_ALLMULTI) {
1704                         inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1705                         dev_set_allmulti(port->dev, inc);
1706                 }
1707         }
1708         rcu_read_unlock();
1709 }
1710 
1711 static void team_set_rx_mode(struct net_device *dev)
1712 {
1713         struct team *team = netdev_priv(dev);
1714         struct team_port *port;
1715 
1716         rcu_read_lock();
1717         list_for_each_entry_rcu(port, &team->port_list, list) {
1718                 dev_uc_sync_multiple(port->dev, dev);
1719                 dev_mc_sync_multiple(port->dev, dev);
1720         }
1721         rcu_read_unlock();
1722 }
1723 
1724 static int team_set_mac_address(struct net_device *dev, void *p)
1725 {
1726         struct sockaddr *addr = p;
1727         struct team *team = netdev_priv(dev);
1728         struct team_port *port;
1729 
1730         if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1731                 return -EADDRNOTAVAIL;
1732         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1733         mutex_lock(&team->lock);
1734         list_for_each_entry(port, &team->port_list, list)
1735                 if (team->ops.port_change_dev_addr)
1736                         team->ops.port_change_dev_addr(team, port);
1737         mutex_unlock(&team->lock);
1738         return 0;
1739 }
1740 
1741 static int team_change_mtu(struct net_device *dev, int new_mtu)
1742 {
1743         struct team *team = netdev_priv(dev);
1744         struct team_port *port;
1745         int err;
1746 
1747         /*
1748          * Alhough this is reader, it's guarded by team lock. It's not possible
1749          * to traverse list in reverse under rcu_read_lock
1750          */
1751         mutex_lock(&team->lock);
1752         team->port_mtu_change_allowed = true;
1753         list_for_each_entry(port, &team->port_list, list) {
1754                 err = dev_set_mtu(port->dev, new_mtu);
1755                 if (err) {
1756                         netdev_err(dev, "Device %s failed to change mtu",
1757                                    port->dev->name);
1758                         goto unwind;
1759                 }
1760         }
1761         team->port_mtu_change_allowed = false;
1762         mutex_unlock(&team->lock);
1763 
1764         dev->mtu = new_mtu;
1765 
1766         return 0;
1767 
1768 unwind:
1769         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1770                 dev_set_mtu(port->dev, dev->mtu);
1771         team->port_mtu_change_allowed = false;
1772         mutex_unlock(&team->lock);
1773 
1774         return err;
1775 }
1776 
1777 static struct rtnl_link_stats64 *
1778 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1779 {
1780         struct team *team = netdev_priv(dev);
1781         struct team_pcpu_stats *p;
1782         u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1783         u32 rx_dropped = 0, tx_dropped = 0;
1784         unsigned int start;
1785         int i;
1786 
1787         for_each_possible_cpu(i) {
1788                 p = per_cpu_ptr(team->pcpu_stats, i);
1789                 do {
1790                         start = u64_stats_fetch_begin_irq(&p->syncp);
1791                         rx_packets      = p->rx_packets;
1792                         rx_bytes        = p->rx_bytes;
1793                         rx_multicast    = p->rx_multicast;
1794                         tx_packets      = p->tx_packets;
1795                         tx_bytes        = p->tx_bytes;
1796                 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
1797 
1798                 stats->rx_packets       += rx_packets;
1799                 stats->rx_bytes         += rx_bytes;
1800                 stats->multicast        += rx_multicast;
1801                 stats->tx_packets       += tx_packets;
1802                 stats->tx_bytes         += tx_bytes;
1803                 /*
1804                  * rx_dropped & tx_dropped are u32, updated
1805                  * without syncp protection.
1806                  */
1807                 rx_dropped      += p->rx_dropped;
1808                 tx_dropped      += p->tx_dropped;
1809         }
1810         stats->rx_dropped       = rx_dropped;
1811         stats->tx_dropped       = tx_dropped;
1812         return stats;
1813 }
1814 
1815 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1816 {
1817         struct team *team = netdev_priv(dev);
1818         struct team_port *port;
1819         int err;
1820 
1821         /*
1822          * Alhough this is reader, it's guarded by team lock. It's not possible
1823          * to traverse list in reverse under rcu_read_lock
1824          */
1825         mutex_lock(&team->lock);
1826         list_for_each_entry(port, &team->port_list, list) {
1827                 err = vlan_vid_add(port->dev, proto, vid);
1828                 if (err)
1829                         goto unwind;
1830         }
1831         mutex_unlock(&team->lock);
1832 
1833         return 0;
1834 
1835 unwind:
1836         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1837                 vlan_vid_del(port->dev, proto, vid);
1838         mutex_unlock(&team->lock);
1839 
1840         return err;
1841 }
1842 
1843 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1844 {
1845         struct team *team = netdev_priv(dev);
1846         struct team_port *port;
1847 
1848         rcu_read_lock();
1849         list_for_each_entry_rcu(port, &team->port_list, list)
1850                 vlan_vid_del(port->dev, proto, vid);
1851         rcu_read_unlock();
1852 
1853         return 0;
1854 }
1855 
1856 #ifdef CONFIG_NET_POLL_CONTROLLER
1857 static void team_poll_controller(struct net_device *dev)
1858 {
1859 }
1860 
1861 static void __team_netpoll_cleanup(struct team *team)
1862 {
1863         struct team_port *port;
1864 
1865         list_for_each_entry(port, &team->port_list, list)
1866                 team_port_disable_netpoll(port);
1867 }
1868 
1869 static void team_netpoll_cleanup(struct net_device *dev)
1870 {
1871         struct team *team = netdev_priv(dev);
1872 
1873         mutex_lock(&team->lock);
1874         __team_netpoll_cleanup(team);
1875         mutex_unlock(&team->lock);
1876 }
1877 
1878 static int team_netpoll_setup(struct net_device *dev,
1879                               struct netpoll_info *npifo)
1880 {
1881         struct team *team = netdev_priv(dev);
1882         struct team_port *port;
1883         int err = 0;
1884 
1885         mutex_lock(&team->lock);
1886         list_for_each_entry(port, &team->port_list, list) {
1887                 err = team_port_enable_netpoll(team, port);
1888                 if (err) {
1889                         __team_netpoll_cleanup(team);
1890                         break;
1891                 }
1892         }
1893         mutex_unlock(&team->lock);
1894         return err;
1895 }
1896 #endif
1897 
1898 static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
1899 {
1900         struct team *team = netdev_priv(dev);
1901         int err;
1902 
1903         mutex_lock(&team->lock);
1904         err = team_port_add(team, port_dev);
1905         mutex_unlock(&team->lock);
1906         return err;
1907 }
1908 
1909 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1910 {
1911         struct team *team = netdev_priv(dev);
1912         int err;
1913 
1914         mutex_lock(&team->lock);
1915         err = team_port_del(team, port_dev);
1916         mutex_unlock(&team->lock);
1917         return err;
1918 }
1919 
1920 static netdev_features_t team_fix_features(struct net_device *dev,
1921                                            netdev_features_t features)
1922 {
1923         struct team_port *port;
1924         struct team *team = netdev_priv(dev);
1925         netdev_features_t mask;
1926 
1927         mask = features | NETIF_F_HW_SWITCH_OFFLOAD;
1928         features &= ~NETIF_F_ONE_FOR_ALL;
1929         features |= NETIF_F_ALL_FOR_ALL;
1930 
1931         rcu_read_lock();
1932         list_for_each_entry_rcu(port, &team->port_list, list) {
1933                 features = netdev_increment_features(features,
1934                                                      port->dev->features,
1935                                                      mask);
1936         }
1937         rcu_read_unlock();
1938 
1939         features = netdev_add_tso_features(features, mask);
1940 
1941         return features;
1942 }
1943 
1944 static int team_change_carrier(struct net_device *dev, bool new_carrier)
1945 {
1946         struct team *team = netdev_priv(dev);
1947 
1948         team->user_carrier_enabled = true;
1949 
1950         if (new_carrier)
1951                 netif_carrier_on(dev);
1952         else
1953                 netif_carrier_off(dev);
1954         return 0;
1955 }
1956 
1957 static const struct net_device_ops team_netdev_ops = {
1958         .ndo_init               = team_init,
1959         .ndo_uninit             = team_uninit,
1960         .ndo_open               = team_open,
1961         .ndo_stop               = team_close,
1962         .ndo_start_xmit         = team_xmit,
1963         .ndo_select_queue       = team_select_queue,
1964         .ndo_change_rx_flags    = team_change_rx_flags,
1965         .ndo_set_rx_mode        = team_set_rx_mode,
1966         .ndo_set_mac_address    = team_set_mac_address,
1967         .ndo_change_mtu         = team_change_mtu,
1968         .ndo_get_stats64        = team_get_stats64,
1969         .ndo_vlan_rx_add_vid    = team_vlan_rx_add_vid,
1970         .ndo_vlan_rx_kill_vid   = team_vlan_rx_kill_vid,
1971 #ifdef CONFIG_NET_POLL_CONTROLLER
1972         .ndo_poll_controller    = team_poll_controller,
1973         .ndo_netpoll_setup      = team_netpoll_setup,
1974         .ndo_netpoll_cleanup    = team_netpoll_cleanup,
1975 #endif
1976         .ndo_add_slave          = team_add_slave,
1977         .ndo_del_slave          = team_del_slave,
1978         .ndo_fix_features       = team_fix_features,
1979         .ndo_change_carrier     = team_change_carrier,
1980         .ndo_bridge_setlink     = ndo_dflt_netdev_switch_port_bridge_setlink,
1981         .ndo_bridge_dellink     = ndo_dflt_netdev_switch_port_bridge_dellink,
1982         .ndo_features_check     = passthru_features_check,
1983 };
1984 
1985 /***********************
1986  * ethtool interface
1987  ***********************/
1988 
1989 static void team_ethtool_get_drvinfo(struct net_device *dev,
1990                                      struct ethtool_drvinfo *drvinfo)
1991 {
1992         strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
1993         strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
1994 }
1995 
1996 static const struct ethtool_ops team_ethtool_ops = {
1997         .get_drvinfo            = team_ethtool_get_drvinfo,
1998         .get_link               = ethtool_op_get_link,
1999 };
2000 
2001 /***********************
2002  * rt netlink interface
2003  ***********************/
2004 
2005 static void team_setup_by_port(struct net_device *dev,
2006                                struct net_device *port_dev)
2007 {
2008         dev->header_ops = port_dev->header_ops;
2009         dev->type = port_dev->type;
2010         dev->hard_header_len = port_dev->hard_header_len;
2011         dev->addr_len = port_dev->addr_len;
2012         dev->mtu = port_dev->mtu;
2013         memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2014         eth_hw_addr_inherit(dev, port_dev);
2015 }
2016 
2017 static int team_dev_type_check_change(struct net_device *dev,
2018                                       struct net_device *port_dev)
2019 {
2020         struct team *team = netdev_priv(dev);
2021         char *portname = port_dev->name;
2022         int err;
2023 
2024         if (dev->type == port_dev->type)
2025                 return 0;
2026         if (!list_empty(&team->port_list)) {
2027                 netdev_err(dev, "Device %s is of different type\n", portname);
2028                 return -EBUSY;
2029         }
2030         err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2031         err = notifier_to_errno(err);
2032         if (err) {
2033                 netdev_err(dev, "Refused to change device type\n");
2034                 return err;
2035         }
2036         dev_uc_flush(dev);
2037         dev_mc_flush(dev);
2038         team_setup_by_port(dev, port_dev);
2039         call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2040         return 0;
2041 }
2042 
2043 static void team_setup(struct net_device *dev)
2044 {
2045         ether_setup(dev);
2046 
2047         dev->netdev_ops = &team_netdev_ops;
2048         dev->ethtool_ops = &team_ethtool_ops;
2049         dev->destructor = team_destructor;
2050         dev->tx_queue_len = 0;
2051         dev->flags |= IFF_MULTICAST;
2052         dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2053 
2054         /*
2055          * Indicate we support unicast address filtering. That way core won't
2056          * bring us to promisc mode in case a unicast addr is added.
2057          * Let this up to underlay drivers.
2058          */
2059         dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2060 
2061         dev->features |= NETIF_F_LLTX;
2062         dev->features |= NETIF_F_GRO;
2063 
2064         /* Don't allow team devices to change network namespaces. */
2065         dev->features |= NETIF_F_NETNS_LOCAL;
2066 
2067         dev->hw_features = TEAM_VLAN_FEATURES |
2068                            NETIF_F_HW_VLAN_CTAG_TX |
2069                            NETIF_F_HW_VLAN_CTAG_RX |
2070                            NETIF_F_HW_VLAN_CTAG_FILTER;
2071 
2072         dev->hw_features &= ~(NETIF_F_ALL_CSUM & ~NETIF_F_HW_CSUM);
2073         dev->features |= dev->hw_features;
2074 }
2075 
2076 static int team_newlink(struct net *src_net, struct net_device *dev,
2077                         struct nlattr *tb[], struct nlattr *data[])
2078 {
2079         if (tb[IFLA_ADDRESS] == NULL)
2080                 eth_hw_addr_random(dev);
2081 
2082         return register_netdevice(dev);
2083 }
2084 
2085 static int team_validate(struct nlattr *tb[], struct nlattr *data[])
2086 {
2087         if (tb[IFLA_ADDRESS]) {
2088                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2089                         return -EINVAL;
2090                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2091                         return -EADDRNOTAVAIL;
2092         }
2093         return 0;
2094 }
2095 
2096 static unsigned int team_get_num_tx_queues(void)
2097 {
2098         return TEAM_DEFAULT_NUM_TX_QUEUES;
2099 }
2100 
2101 static unsigned int team_get_num_rx_queues(void)
2102 {
2103         return TEAM_DEFAULT_NUM_RX_QUEUES;
2104 }
2105 
2106 static struct rtnl_link_ops team_link_ops __read_mostly = {
2107         .kind                   = DRV_NAME,
2108         .priv_size              = sizeof(struct team),
2109         .setup                  = team_setup,
2110         .newlink                = team_newlink,
2111         .validate               = team_validate,
2112         .get_num_tx_queues      = team_get_num_tx_queues,
2113         .get_num_rx_queues      = team_get_num_rx_queues,
2114 };
2115 
2116 
2117 /***********************************
2118  * Generic netlink custom interface
2119  ***********************************/
2120 
2121 static struct genl_family team_nl_family = {
2122         .id             = GENL_ID_GENERATE,
2123         .name           = TEAM_GENL_NAME,
2124         .version        = TEAM_GENL_VERSION,
2125         .maxattr        = TEAM_ATTR_MAX,
2126         .netnsok        = true,
2127 };
2128 
2129 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2130         [TEAM_ATTR_UNSPEC]                      = { .type = NLA_UNSPEC, },
2131         [TEAM_ATTR_TEAM_IFINDEX]                = { .type = NLA_U32 },
2132         [TEAM_ATTR_LIST_OPTION]                 = { .type = NLA_NESTED },
2133         [TEAM_ATTR_LIST_PORT]                   = { .type = NLA_NESTED },
2134 };
2135 
2136 static const struct nla_policy
2137 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2138         [TEAM_ATTR_OPTION_UNSPEC]               = { .type = NLA_UNSPEC, },
2139         [TEAM_ATTR_OPTION_NAME] = {
2140                 .type = NLA_STRING,
2141                 .len = TEAM_STRING_MAX_LEN,
2142         },
2143         [TEAM_ATTR_OPTION_CHANGED]              = { .type = NLA_FLAG },
2144         [TEAM_ATTR_OPTION_TYPE]                 = { .type = NLA_U8 },
2145         [TEAM_ATTR_OPTION_DATA]                 = { .type = NLA_BINARY },
2146 };
2147 
2148 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2149 {
2150         struct sk_buff *msg;
2151         void *hdr;
2152         int err;
2153 
2154         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2155         if (!msg)
2156                 return -ENOMEM;
2157 
2158         hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2159                           &team_nl_family, 0, TEAM_CMD_NOOP);
2160         if (!hdr) {
2161                 err = -EMSGSIZE;
2162                 goto err_msg_put;
2163         }
2164 
2165         genlmsg_end(msg, hdr);
2166 
2167         return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2168 
2169 err_msg_put:
2170         nlmsg_free(msg);
2171 
2172         return err;
2173 }
2174 
2175 /*
2176  * Netlink cmd functions should be locked by following two functions.
2177  * Since dev gets held here, that ensures dev won't disappear in between.
2178  */
2179 static struct team *team_nl_team_get(struct genl_info *info)
2180 {
2181         struct net *net = genl_info_net(info);
2182         int ifindex;
2183         struct net_device *dev;
2184         struct team *team;
2185 
2186         if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2187                 return NULL;
2188 
2189         ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2190         dev = dev_get_by_index(net, ifindex);
2191         if (!dev || dev->netdev_ops != &team_netdev_ops) {
2192                 if (dev)
2193                         dev_put(dev);
2194                 return NULL;
2195         }
2196 
2197         team = netdev_priv(dev);
2198         mutex_lock(&team->lock);
2199         return team;
2200 }
2201 
2202 static void team_nl_team_put(struct team *team)
2203 {
2204         mutex_unlock(&team->lock);
2205         dev_put(team->dev);
2206 }
2207 
2208 typedef int team_nl_send_func_t(struct sk_buff *skb,
2209                                 struct team *team, u32 portid);
2210 
2211 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2212 {
2213         return genlmsg_unicast(dev_net(team->dev), skb, portid);
2214 }
2215 
2216 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2217                                        struct team_option_inst *opt_inst)
2218 {
2219         struct nlattr *option_item;
2220         struct team_option *option = opt_inst->option;
2221         struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2222         struct team_gsetter_ctx ctx;
2223         int err;
2224 
2225         ctx.info = opt_inst_info;
2226         err = team_option_get(team, opt_inst, &ctx);
2227         if (err)
2228                 return err;
2229 
2230         option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
2231         if (!option_item)
2232                 return -EMSGSIZE;
2233 
2234         if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2235                 goto nest_cancel;
2236         if (opt_inst_info->port &&
2237             nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2238                         opt_inst_info->port->dev->ifindex))
2239                 goto nest_cancel;
2240         if (opt_inst->option->array_size &&
2241             nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2242                         opt_inst_info->array_index))
2243                 goto nest_cancel;
2244 
2245         switch (option->type) {
2246         case TEAM_OPTION_TYPE_U32:
2247                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2248                         goto nest_cancel;
2249                 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2250                         goto nest_cancel;
2251                 break;
2252         case TEAM_OPTION_TYPE_STRING:
2253                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2254                         goto nest_cancel;
2255                 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2256                                    ctx.data.str_val))
2257                         goto nest_cancel;
2258                 break;
2259         case TEAM_OPTION_TYPE_BINARY:
2260                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2261                         goto nest_cancel;
2262                 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2263                             ctx.data.bin_val.ptr))
2264                         goto nest_cancel;
2265                 break;
2266         case TEAM_OPTION_TYPE_BOOL:
2267                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2268                         goto nest_cancel;
2269                 if (ctx.data.bool_val &&
2270                     nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2271                         goto nest_cancel;
2272                 break;
2273         case TEAM_OPTION_TYPE_S32:
2274                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2275                         goto nest_cancel;
2276                 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2277                         goto nest_cancel;
2278                 break;
2279         default:
2280                 BUG();
2281         }
2282         if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2283                 goto nest_cancel;
2284         if (opt_inst->changed) {
2285                 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2286                         goto nest_cancel;
2287                 opt_inst->changed = false;
2288         }
2289         nla_nest_end(skb, option_item);
2290         return 0;
2291 
2292 nest_cancel:
2293         nla_nest_cancel(skb, option_item);
2294         return -EMSGSIZE;
2295 }
2296 
2297 static int __send_and_alloc_skb(struct sk_buff **pskb,
2298                                 struct team *team, u32 portid,
2299                                 team_nl_send_func_t *send_func)
2300 {
2301         int err;
2302 
2303         if (*pskb) {
2304                 err = send_func(*pskb, team, portid);
2305                 if (err)
2306                         return err;
2307         }
2308         *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2309         if (!*pskb)
2310                 return -ENOMEM;
2311         return 0;
2312 }
2313 
2314 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2315                                     int flags, team_nl_send_func_t *send_func,
2316                                     struct list_head *sel_opt_inst_list)
2317 {
2318         struct nlattr *option_list;
2319         struct nlmsghdr *nlh;
2320         void *hdr;
2321         struct team_option_inst *opt_inst;
2322         int err;
2323         struct sk_buff *skb = NULL;
2324         bool incomplete;
2325         int i;
2326 
2327         opt_inst = list_first_entry(sel_opt_inst_list,
2328                                     struct team_option_inst, tmp_list);
2329 
2330 start_again:
2331         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2332         if (err)
2333                 return err;
2334 
2335         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2336                           TEAM_CMD_OPTIONS_GET);
2337         if (!hdr)
2338                 return -EMSGSIZE;
2339 
2340         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2341                 goto nla_put_failure;
2342         option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2343         if (!option_list)
2344                 goto nla_put_failure;
2345 
2346         i = 0;
2347         incomplete = false;
2348         list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2349                 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2350                 if (err) {
2351                         if (err == -EMSGSIZE) {
2352                                 if (!i)
2353                                         goto errout;
2354                                 incomplete = true;
2355                                 break;
2356                         }
2357                         goto errout;
2358                 }
2359                 i++;
2360         }
2361 
2362         nla_nest_end(skb, option_list);
2363         genlmsg_end(skb, hdr);
2364         if (incomplete)
2365                 goto start_again;
2366 
2367 send_done:
2368         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2369         if (!nlh) {
2370                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2371                 if (err)
2372                         goto errout;
2373                 goto send_done;
2374         }
2375 
2376         return send_func(skb, team, portid);
2377 
2378 nla_put_failure:
2379         err = -EMSGSIZE;
2380 errout:
2381         genlmsg_cancel(skb, hdr);
2382         nlmsg_free(skb);
2383         return err;
2384 }
2385 
2386 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2387 {
2388         struct team *team;
2389         struct team_option_inst *opt_inst;
2390         int err;
2391         LIST_HEAD(sel_opt_inst_list);
2392 
2393         team = team_nl_team_get(info);
2394         if (!team)
2395                 return -EINVAL;
2396 
2397         list_for_each_entry(opt_inst, &team->option_inst_list, list)
2398                 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2399         err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2400                                        NLM_F_ACK, team_nl_send_unicast,
2401                                        &sel_opt_inst_list);
2402 
2403         team_nl_team_put(team);
2404 
2405         return err;
2406 }
2407 
2408 static int team_nl_send_event_options_get(struct team *team,
2409                                           struct list_head *sel_opt_inst_list);
2410 
2411 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2412 {
2413         struct team *team;
2414         int err = 0;
2415         int i;
2416         struct nlattr *nl_option;
2417         LIST_HEAD(opt_inst_list);
2418 
2419         team = team_nl_team_get(info);
2420         if (!team)
2421                 return -EINVAL;
2422 
2423         err = -EINVAL;
2424         if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2425                 err = -EINVAL;
2426                 goto team_put;
2427         }
2428 
2429         nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2430                 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2431                 struct nlattr *attr;
2432                 struct nlattr *attr_data;
2433                 enum team_option_type opt_type;
2434                 int opt_port_ifindex = 0; /* != 0 for per-port options */
2435                 u32 opt_array_index = 0;
2436                 bool opt_is_array = false;
2437                 struct team_option_inst *opt_inst;
2438                 char *opt_name;
2439                 bool opt_found = false;
2440 
2441                 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2442                         err = -EINVAL;
2443                         goto team_put;
2444                 }
2445                 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2446                                        nl_option, team_nl_option_policy);
2447                 if (err)
2448                         goto team_put;
2449                 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2450                     !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2451                         err = -EINVAL;
2452                         goto team_put;
2453                 }
2454                 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2455                 case NLA_U32:
2456                         opt_type = TEAM_OPTION_TYPE_U32;
2457                         break;
2458                 case NLA_STRING:
2459                         opt_type = TEAM_OPTION_TYPE_STRING;
2460                         break;
2461                 case NLA_BINARY:
2462                         opt_type = TEAM_OPTION_TYPE_BINARY;
2463                         break;
2464                 case NLA_FLAG:
2465                         opt_type = TEAM_OPTION_TYPE_BOOL;
2466                         break;
2467                 case NLA_S32:
2468                         opt_type = TEAM_OPTION_TYPE_S32;
2469                         break;
2470                 default:
2471                         goto team_put;
2472                 }
2473 
2474                 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2475                 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2476                         err = -EINVAL;
2477                         goto team_put;
2478                 }
2479 
2480                 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2481                 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2482                 if (attr)
2483                         opt_port_ifindex = nla_get_u32(attr);
2484 
2485                 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2486                 if (attr) {
2487                         opt_is_array = true;
2488                         opt_array_index = nla_get_u32(attr);
2489                 }
2490 
2491                 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2492                         struct team_option *option = opt_inst->option;
2493                         struct team_gsetter_ctx ctx;
2494                         struct team_option_inst_info *opt_inst_info;
2495                         int tmp_ifindex;
2496 
2497                         opt_inst_info = &opt_inst->info;
2498                         tmp_ifindex = opt_inst_info->port ?
2499                                       opt_inst_info->port->dev->ifindex : 0;
2500                         if (option->type != opt_type ||
2501                             strcmp(option->name, opt_name) ||
2502                             tmp_ifindex != opt_port_ifindex ||
2503                             (option->array_size && !opt_is_array) ||
2504                             opt_inst_info->array_index != opt_array_index)
2505                                 continue;
2506                         opt_found = true;
2507                         ctx.info = opt_inst_info;
2508                         switch (opt_type) {
2509                         case TEAM_OPTION_TYPE_U32:
2510                                 ctx.data.u32_val = nla_get_u32(attr_data);
2511                                 break;
2512                         case TEAM_OPTION_TYPE_STRING:
2513                                 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2514                                         err = -EINVAL;
2515                                         goto team_put;
2516                                 }
2517                                 ctx.data.str_val = nla_data(attr_data);
2518                                 break;
2519                         case TEAM_OPTION_TYPE_BINARY:
2520                                 ctx.data.bin_val.len = nla_len(attr_data);
2521                                 ctx.data.bin_val.ptr = nla_data(attr_data);
2522                                 break;
2523                         case TEAM_OPTION_TYPE_BOOL:
2524                                 ctx.data.bool_val = attr_data ? true : false;
2525                                 break;
2526                         case TEAM_OPTION_TYPE_S32:
2527                                 ctx.data.s32_val = nla_get_s32(attr_data);
2528                                 break;
2529                         default:
2530                                 BUG();
2531                         }
2532                         err = team_option_set(team, opt_inst, &ctx);
2533                         if (err)
2534                                 goto team_put;
2535                         opt_inst->changed = true;
2536                         list_add(&opt_inst->tmp_list, &opt_inst_list);
2537                 }
2538                 if (!opt_found) {
2539                         err = -ENOENT;
2540                         goto team_put;
2541                 }
2542         }
2543 
2544         err = team_nl_send_event_options_get(team, &opt_inst_list);
2545 
2546 team_put:
2547         team_nl_team_put(team);
2548 
2549         return err;
2550 }
2551 
2552 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2553                                      struct team_port *port)
2554 {
2555         struct nlattr *port_item;
2556 
2557         port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2558         if (!port_item)
2559                 goto nest_cancel;
2560         if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2561                 goto nest_cancel;
2562         if (port->changed) {
2563                 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2564                         goto nest_cancel;
2565                 port->changed = false;
2566         }
2567         if ((port->removed &&
2568              nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2569             (port->state.linkup &&
2570              nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2571             nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2572             nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2573                 goto nest_cancel;
2574         nla_nest_end(skb, port_item);
2575         return 0;
2576 
2577 nest_cancel:
2578         nla_nest_cancel(skb, port_item);
2579         return -EMSGSIZE;
2580 }
2581 
2582 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2583                                       int flags, team_nl_send_func_t *send_func,
2584                                       struct team_port *one_port)
2585 {
2586         struct nlattr *port_list;
2587         struct nlmsghdr *nlh;
2588         void *hdr;
2589         struct team_port *port;
2590         int err;
2591         struct sk_buff *skb = NULL;
2592         bool incomplete;
2593         int i;
2594 
2595         port = list_first_entry_or_null(&team->port_list,
2596                                         struct team_port, list);
2597 
2598 start_again:
2599         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2600         if (err)
2601                 return err;
2602 
2603         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2604                           TEAM_CMD_PORT_LIST_GET);
2605         if (!hdr)
2606                 return -EMSGSIZE;
2607 
2608         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2609                 goto nla_put_failure;
2610         port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2611         if (!port_list)
2612                 goto nla_put_failure;
2613 
2614         i = 0;
2615         incomplete = false;
2616 
2617         /* If one port is selected, called wants to send port list containing
2618          * only this port. Otherwise go through all listed ports and send all
2619          */
2620         if (one_port) {
2621                 err = team_nl_fill_one_port_get(skb, one_port);
2622                 if (err)
2623                         goto errout;
2624         } else if (port) {
2625                 list_for_each_entry_from(port, &team->port_list, list) {
2626                         err = team_nl_fill_one_port_get(skb, port);
2627                         if (err) {
2628                                 if (err == -EMSGSIZE) {
2629                                         if (!i)
2630                                                 goto errout;
2631                                         incomplete = true;
2632                                         break;
2633                                 }
2634                                 goto errout;
2635                         }
2636                         i++;
2637                 }
2638         }
2639 
2640         nla_nest_end(skb, port_list);
2641         genlmsg_end(skb, hdr);
2642         if (incomplete)
2643                 goto start_again;
2644 
2645 send_done:
2646         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2647         if (!nlh) {
2648                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2649                 if (err)
2650                         goto errout;
2651                 goto send_done;
2652         }
2653 
2654         return send_func(skb, team, portid);
2655 
2656 nla_put_failure:
2657         err = -EMSGSIZE;
2658 errout:
2659         genlmsg_cancel(skb, hdr);
2660         nlmsg_free(skb);
2661         return err;
2662 }
2663 
2664 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2665                                      struct genl_info *info)
2666 {
2667         struct team *team;
2668         int err;
2669 
2670         team = team_nl_team_get(info);
2671         if (!team)
2672                 return -EINVAL;
2673 
2674         err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2675                                          NLM_F_ACK, team_nl_send_unicast, NULL);
2676 
2677         team_nl_team_put(team);
2678 
2679         return err;
2680 }
2681 
2682 static const struct genl_ops team_nl_ops[] = {
2683         {
2684                 .cmd = TEAM_CMD_NOOP,
2685                 .doit = team_nl_cmd_noop,
2686                 .policy = team_nl_policy,
2687         },
2688         {
2689                 .cmd = TEAM_CMD_OPTIONS_SET,
2690                 .doit = team_nl_cmd_options_set,
2691                 .policy = team_nl_policy,
2692                 .flags = GENL_ADMIN_PERM,
2693         },
2694         {
2695                 .cmd = TEAM_CMD_OPTIONS_GET,
2696                 .doit = team_nl_cmd_options_get,
2697                 .policy = team_nl_policy,
2698                 .flags = GENL_ADMIN_PERM,
2699         },
2700         {
2701                 .cmd = TEAM_CMD_PORT_LIST_GET,
2702                 .doit = team_nl_cmd_port_list_get,
2703                 .policy = team_nl_policy,
2704                 .flags = GENL_ADMIN_PERM,
2705         },
2706 };
2707 
2708 static const struct genl_multicast_group team_nl_mcgrps[] = {
2709         { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2710 };
2711 
2712 static int team_nl_send_multicast(struct sk_buff *skb,
2713                                   struct team *team, u32 portid)
2714 {
2715         return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2716                                        skb, 0, 0, GFP_KERNEL);
2717 }
2718 
2719 static int team_nl_send_event_options_get(struct team *team,
2720                                           struct list_head *sel_opt_inst_list)
2721 {
2722         return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2723                                         sel_opt_inst_list);
2724 }
2725 
2726 static int team_nl_send_event_port_get(struct team *team,
2727                                        struct team_port *port)
2728 {
2729         return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2730                                           port);
2731 }
2732 
2733 static int team_nl_init(void)
2734 {
2735         return genl_register_family_with_ops_groups(&team_nl_family, team_nl_ops,
2736                                                     team_nl_mcgrps);
2737 }
2738 
2739 static void team_nl_fini(void)
2740 {
2741         genl_unregister_family(&team_nl_family);
2742 }
2743 
2744 
2745 /******************
2746  * Change checkers
2747  ******************/
2748 
2749 static void __team_options_change_check(struct team *team)
2750 {
2751         int err;
2752         struct team_option_inst *opt_inst;
2753         LIST_HEAD(sel_opt_inst_list);
2754 
2755         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2756                 if (opt_inst->changed)
2757                         list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2758         }
2759         err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2760         if (err && err != -ESRCH)
2761                 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2762                             err);
2763 }
2764 
2765 /* rtnl lock is held */
2766 
2767 static void __team_port_change_send(struct team_port *port, bool linkup)
2768 {
2769         int err;
2770 
2771         port->changed = true;
2772         port->state.linkup = linkup;
2773         team_refresh_port_linkup(port);
2774         if (linkup) {
2775                 struct ethtool_cmd ecmd;
2776 
2777                 err = __ethtool_get_settings(port->dev, &ecmd);
2778                 if (!err) {
2779                         port->state.speed = ethtool_cmd_speed(&ecmd);
2780                         port->state.duplex = ecmd.duplex;
2781                         goto send_event;
2782                 }
2783         }
2784         port->state.speed = 0;
2785         port->state.duplex = 0;
2786 
2787 send_event:
2788         err = team_nl_send_event_port_get(port->team, port);
2789         if (err && err != -ESRCH)
2790                 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2791                             port->dev->name, err);
2792 
2793 }
2794 
2795 static void __team_carrier_check(struct team *team)
2796 {
2797         struct team_port *port;
2798         bool team_linkup;
2799 
2800         if (team->user_carrier_enabled)
2801                 return;
2802 
2803         team_linkup = false;
2804         list_for_each_entry(port, &team->port_list, list) {
2805                 if (port->linkup) {
2806                         team_linkup = true;
2807                         break;
2808                 }
2809         }
2810 
2811         if (team_linkup)
2812                 netif_carrier_on(team->dev);
2813         else
2814                 netif_carrier_off(team->dev);
2815 }
2816 
2817 static void __team_port_change_check(struct team_port *port, bool linkup)
2818 {
2819         if (port->state.linkup != linkup)
2820                 __team_port_change_send(port, linkup);
2821         __team_carrier_check(port->team);
2822 }
2823 
2824 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2825 {
2826         __team_port_change_send(port, linkup);
2827         __team_carrier_check(port->team);
2828 }
2829 
2830 static void __team_port_change_port_removed(struct team_port *port)
2831 {
2832         port->removed = true;
2833         __team_port_change_send(port, false);
2834         __team_carrier_check(port->team);
2835 }
2836 
2837 static void team_port_change_check(struct team_port *port, bool linkup)
2838 {
2839         struct team *team = port->team;
2840 
2841         mutex_lock(&team->lock);
2842         __team_port_change_check(port, linkup);
2843         mutex_unlock(&team->lock);
2844 }
2845 
2846 
2847 /************************************
2848  * Net device notifier event handler
2849  ************************************/
2850 
2851 static int team_device_event(struct notifier_block *unused,
2852                              unsigned long event, void *ptr)
2853 {
2854         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2855         struct team_port *port;
2856 
2857         port = team_port_get_rtnl(dev);
2858         if (!port)
2859                 return NOTIFY_DONE;
2860 
2861         switch (event) {
2862         case NETDEV_UP:
2863                 if (netif_carrier_ok(dev))
2864                         team_port_change_check(port, true);
2865                 break;
2866         case NETDEV_DOWN:
2867                 team_port_change_check(port, false);
2868                 break;
2869         case NETDEV_CHANGE:
2870                 if (netif_running(port->dev))
2871                         team_port_change_check(port,
2872                                                !!netif_carrier_ok(port->dev));
2873                 break;
2874         case NETDEV_UNREGISTER:
2875                 team_del_slave(port->team->dev, dev);
2876                 break;
2877         case NETDEV_FEAT_CHANGE:
2878                 team_compute_features(port->team);
2879                 break;
2880         case NETDEV_PRECHANGEMTU:
2881                 /* Forbid to change mtu of underlaying device */
2882                 if (!port->team->port_mtu_change_allowed)
2883                         return NOTIFY_BAD;
2884                 break;
2885         case NETDEV_PRE_TYPE_CHANGE:
2886                 /* Forbid to change type of underlaying device */
2887                 return NOTIFY_BAD;
2888         case NETDEV_RESEND_IGMP:
2889                 /* Propagate to master device */
2890                 call_netdevice_notifiers(event, port->team->dev);
2891                 break;
2892         }
2893         return NOTIFY_DONE;
2894 }
2895 
2896 static struct notifier_block team_notifier_block __read_mostly = {
2897         .notifier_call = team_device_event,
2898 };
2899 
2900 
2901 /***********************
2902  * Module init and exit
2903  ***********************/
2904 
2905 static int __init team_module_init(void)
2906 {
2907         int err;
2908 
2909         register_netdevice_notifier(&team_notifier_block);
2910 
2911         err = rtnl_link_register(&team_link_ops);
2912         if (err)
2913                 goto err_rtnl_reg;
2914 
2915         err = team_nl_init();
2916         if (err)
2917                 goto err_nl_init;
2918 
2919         return 0;
2920 
2921 err_nl_init:
2922         rtnl_link_unregister(&team_link_ops);
2923 
2924 err_rtnl_reg:
2925         unregister_netdevice_notifier(&team_notifier_block);
2926 
2927         return err;
2928 }
2929 
2930 static void __exit team_module_exit(void)
2931 {
2932         team_nl_fini();
2933         rtnl_link_unregister(&team_link_ops);
2934         unregister_netdevice_notifier(&team_notifier_block);
2935 }
2936 
2937 module_init(team_module_init);
2938 module_exit(team_module_exit);
2939 
2940 MODULE_LICENSE("GPL v2");
2941 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
2942 MODULE_DESCRIPTION("Ethernet team device driver");
2943 MODULE_ALIAS_RTNL_LINK(DRV_NAME);
2944 

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