Version:  2.0.40 2.2.26 2.4.37 3.2 3.3 3.4 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

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 <generated/utsrelease.h>
 32 #include <linux/if_team.h>
 33 
 34 #define DRV_NAME "team"
 35 
 36 
 37 /**********
 38  * Helpers
 39  **********/
 40 
 41 #define team_port_exists(dev) (dev->priv_flags & IFF_TEAM_PORT)
 42 
 43 static struct team_port *team_port_get_rcu(const struct net_device *dev)
 44 {
 45         struct team_port *port = rcu_dereference(dev->rx_handler_data);
 46 
 47         return team_port_exists(dev) ? port : NULL;
 48 }
 49 
 50 static struct team_port *team_port_get_rtnl(const struct net_device *dev)
 51 {
 52         struct team_port *port = rtnl_dereference(dev->rx_handler_data);
 53 
 54         return team_port_exists(dev) ? port : NULL;
 55 }
 56 
 57 /*
 58  * Since the ability to change device address for open port device is tested in
 59  * team_port_add, this function can be called without control of return value
 60  */
 61 static int __set_port_dev_addr(struct net_device *port_dev,
 62                                const unsigned char *dev_addr)
 63 {
 64         struct sockaddr addr;
 65 
 66         memcpy(addr.sa_data, dev_addr, port_dev->addr_len);
 67         addr.sa_family = port_dev->type;
 68         return dev_set_mac_address(port_dev, &addr);
 69 }
 70 
 71 static int team_port_set_orig_dev_addr(struct team_port *port)
 72 {
 73         return __set_port_dev_addr(port->dev, port->orig.dev_addr);
 74 }
 75 
 76 static int team_port_set_team_dev_addr(struct team *team,
 77                                        struct team_port *port)
 78 {
 79         return __set_port_dev_addr(port->dev, team->dev->dev_addr);
 80 }
 81 
 82 int team_modeop_port_enter(struct team *team, struct team_port *port)
 83 {
 84         return team_port_set_team_dev_addr(team, port);
 85 }
 86 EXPORT_SYMBOL(team_modeop_port_enter);
 87 
 88 void team_modeop_port_change_dev_addr(struct team *team,
 89                                       struct team_port *port)
 90 {
 91         team_port_set_team_dev_addr(team, port);
 92 }
 93 EXPORT_SYMBOL(team_modeop_port_change_dev_addr);
 94 
 95 static void team_refresh_port_linkup(struct team_port *port)
 96 {
 97         port->linkup = port->user.linkup_enabled ? port->user.linkup :
 98                                                    port->state.linkup;
 99 }
100 
101 
102 /*******************
103  * Options handling
104  *******************/
105 
106 struct team_option_inst { /* One for each option instance */
107         struct list_head list;
108         struct list_head tmp_list;
109         struct team_option *option;
110         struct team_option_inst_info info;
111         bool changed;
112         bool removed;
113 };
114 
115 static struct team_option *__team_find_option(struct team *team,
116                                               const char *opt_name)
117 {
118         struct team_option *option;
119 
120         list_for_each_entry(option, &team->option_list, list) {
121                 if (strcmp(option->name, opt_name) == 0)
122                         return option;
123         }
124         return NULL;
125 }
126 
127 static void __team_option_inst_del(struct team_option_inst *opt_inst)
128 {
129         list_del(&opt_inst->list);
130         kfree(opt_inst);
131 }
132 
133 static void __team_option_inst_del_option(struct team *team,
134                                           struct team_option *option)
135 {
136         struct team_option_inst *opt_inst, *tmp;
137 
138         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
139                 if (opt_inst->option == option)
140                         __team_option_inst_del(opt_inst);
141         }
142 }
143 
144 static int __team_option_inst_add(struct team *team, struct team_option *option,
145                                   struct team_port *port)
146 {
147         struct team_option_inst *opt_inst;
148         unsigned int array_size;
149         unsigned int i;
150         int err;
151 
152         array_size = option->array_size;
153         if (!array_size)
154                 array_size = 1; /* No array but still need one instance */
155 
156         for (i = 0; i < array_size; i++) {
157                 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL);
158                 if (!opt_inst)
159                         return -ENOMEM;
160                 opt_inst->option = option;
161                 opt_inst->info.port = port;
162                 opt_inst->info.array_index = i;
163                 opt_inst->changed = true;
164                 opt_inst->removed = false;
165                 list_add_tail(&opt_inst->list, &team->option_inst_list);
166                 if (option->init) {
167                         err = option->init(team, &opt_inst->info);
168                         if (err)
169                                 return err;
170                 }
171 
172         }
173         return 0;
174 }
175 
176 static int __team_option_inst_add_option(struct team *team,
177                                          struct team_option *option)
178 {
179         struct team_port *port;
180         int err;
181 
182         if (!option->per_port) {
183                 err = __team_option_inst_add(team, option, NULL);
184                 if (err)
185                         goto inst_del_option;
186         }
187 
188         list_for_each_entry(port, &team->port_list, list) {
189                 err = __team_option_inst_add(team, option, port);
190                 if (err)
191                         goto inst_del_option;
192         }
193         return 0;
194 
195 inst_del_option:
196         __team_option_inst_del_option(team, option);
197         return err;
198 }
199 
200 static void __team_option_inst_mark_removed_option(struct team *team,
201                                                    struct team_option *option)
202 {
203         struct team_option_inst *opt_inst;
204 
205         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
206                 if (opt_inst->option == option) {
207                         opt_inst->changed = true;
208                         opt_inst->removed = true;
209                 }
210         }
211 }
212 
213 static void __team_option_inst_del_port(struct team *team,
214                                         struct team_port *port)
215 {
216         struct team_option_inst *opt_inst, *tmp;
217 
218         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
219                 if (opt_inst->option->per_port &&
220                     opt_inst->info.port == port)
221                         __team_option_inst_del(opt_inst);
222         }
223 }
224 
225 static int __team_option_inst_add_port(struct team *team,
226                                        struct team_port *port)
227 {
228         struct team_option *option;
229         int err;
230 
231         list_for_each_entry(option, &team->option_list, list) {
232                 if (!option->per_port)
233                         continue;
234                 err = __team_option_inst_add(team, option, port);
235                 if (err)
236                         goto inst_del_port;
237         }
238         return 0;
239 
240 inst_del_port:
241         __team_option_inst_del_port(team, port);
242         return err;
243 }
244 
245 static void __team_option_inst_mark_removed_port(struct team *team,
246                                                  struct team_port *port)
247 {
248         struct team_option_inst *opt_inst;
249 
250         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
251                 if (opt_inst->info.port == port) {
252                         opt_inst->changed = true;
253                         opt_inst->removed = true;
254                 }
255         }
256 }
257 
258 static int __team_options_register(struct team *team,
259                                    const struct team_option *option,
260                                    size_t option_count)
261 {
262         int i;
263         struct team_option **dst_opts;
264         int err;
265 
266         dst_opts = kzalloc(sizeof(struct team_option *) * option_count,
267                            GFP_KERNEL);
268         if (!dst_opts)
269                 return -ENOMEM;
270         for (i = 0; i < option_count; i++, option++) {
271                 if (__team_find_option(team, option->name)) {
272                         err = -EEXIST;
273                         goto alloc_rollback;
274                 }
275                 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
276                 if (!dst_opts[i]) {
277                         err = -ENOMEM;
278                         goto alloc_rollback;
279                 }
280         }
281 
282         for (i = 0; i < option_count; i++) {
283                 err = __team_option_inst_add_option(team, dst_opts[i]);
284                 if (err)
285                         goto inst_rollback;
286                 list_add_tail(&dst_opts[i]->list, &team->option_list);
287         }
288 
289         kfree(dst_opts);
290         return 0;
291 
292 inst_rollback:
293         for (i--; i >= 0; i--)
294                 __team_option_inst_del_option(team, dst_opts[i]);
295 
296         i = option_count - 1;
297 alloc_rollback:
298         for (i--; i >= 0; i--)
299                 kfree(dst_opts[i]);
300 
301         kfree(dst_opts);
302         return err;
303 }
304 
305 static void __team_options_mark_removed(struct team *team,
306                                         const struct team_option *option,
307                                         size_t option_count)
308 {
309         int i;
310 
311         for (i = 0; i < option_count; i++, option++) {
312                 struct team_option *del_opt;
313 
314                 del_opt = __team_find_option(team, option->name);
315                 if (del_opt)
316                         __team_option_inst_mark_removed_option(team, del_opt);
317         }
318 }
319 
320 static void __team_options_unregister(struct team *team,
321                                       const struct team_option *option,
322                                       size_t option_count)
323 {
324         int i;
325 
326         for (i = 0; i < option_count; i++, option++) {
327                 struct team_option *del_opt;
328 
329                 del_opt = __team_find_option(team, option->name);
330                 if (del_opt) {
331                         __team_option_inst_del_option(team, del_opt);
332                         list_del(&del_opt->list);
333                         kfree(del_opt);
334                 }
335         }
336 }
337 
338 static void __team_options_change_check(struct team *team);
339 
340 int team_options_register(struct team *team,
341                           const struct team_option *option,
342                           size_t option_count)
343 {
344         int err;
345 
346         err = __team_options_register(team, option, option_count);
347         if (err)
348                 return err;
349         __team_options_change_check(team);
350         return 0;
351 }
352 EXPORT_SYMBOL(team_options_register);
353 
354 void team_options_unregister(struct team *team,
355                              const struct team_option *option,
356                              size_t option_count)
357 {
358         __team_options_mark_removed(team, option, option_count);
359         __team_options_change_check(team);
360         __team_options_unregister(team, option, option_count);
361 }
362 EXPORT_SYMBOL(team_options_unregister);
363 
364 static int team_option_get(struct team *team,
365                            struct team_option_inst *opt_inst,
366                            struct team_gsetter_ctx *ctx)
367 {
368         if (!opt_inst->option->getter)
369                 return -EOPNOTSUPP;
370         return opt_inst->option->getter(team, ctx);
371 }
372 
373 static int team_option_set(struct team *team,
374                            struct team_option_inst *opt_inst,
375                            struct team_gsetter_ctx *ctx)
376 {
377         if (!opt_inst->option->setter)
378                 return -EOPNOTSUPP;
379         return opt_inst->option->setter(team, ctx);
380 }
381 
382 void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info)
383 {
384         struct team_option_inst *opt_inst;
385 
386         opt_inst = container_of(opt_inst_info, struct team_option_inst, info);
387         opt_inst->changed = true;
388 }
389 EXPORT_SYMBOL(team_option_inst_set_change);
390 
391 void team_options_change_check(struct team *team)
392 {
393         __team_options_change_check(team);
394 }
395 EXPORT_SYMBOL(team_options_change_check);
396 
397 
398 /****************
399  * Mode handling
400  ****************/
401 
402 static LIST_HEAD(mode_list);
403 static DEFINE_SPINLOCK(mode_list_lock);
404 
405 struct team_mode_item {
406         struct list_head list;
407         const struct team_mode *mode;
408 };
409 
410 static struct team_mode_item *__find_mode(const char *kind)
411 {
412         struct team_mode_item *mitem;
413 
414         list_for_each_entry(mitem, &mode_list, list) {
415                 if (strcmp(mitem->mode->kind, kind) == 0)
416                         return mitem;
417         }
418         return NULL;
419 }
420 
421 static bool is_good_mode_name(const char *name)
422 {
423         while (*name != '\0') {
424                 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
425                         return false;
426                 name++;
427         }
428         return true;
429 }
430 
431 int team_mode_register(const struct team_mode *mode)
432 {
433         int err = 0;
434         struct team_mode_item *mitem;
435 
436         if (!is_good_mode_name(mode->kind) ||
437             mode->priv_size > TEAM_MODE_PRIV_SIZE)
438                 return -EINVAL;
439 
440         mitem = kmalloc(sizeof(*mitem), GFP_KERNEL);
441         if (!mitem)
442                 return -ENOMEM;
443 
444         spin_lock(&mode_list_lock);
445         if (__find_mode(mode->kind)) {
446                 err = -EEXIST;
447                 kfree(mitem);
448                 goto unlock;
449         }
450         mitem->mode = mode;
451         list_add_tail(&mitem->list, &mode_list);
452 unlock:
453         spin_unlock(&mode_list_lock);
454         return err;
455 }
456 EXPORT_SYMBOL(team_mode_register);
457 
458 void team_mode_unregister(const struct team_mode *mode)
459 {
460         struct team_mode_item *mitem;
461 
462         spin_lock(&mode_list_lock);
463         mitem = __find_mode(mode->kind);
464         if (mitem) {
465                 list_del_init(&mitem->list);
466                 kfree(mitem);
467         }
468         spin_unlock(&mode_list_lock);
469 }
470 EXPORT_SYMBOL(team_mode_unregister);
471 
472 static const struct team_mode *team_mode_get(const char *kind)
473 {
474         struct team_mode_item *mitem;
475         const struct team_mode *mode = NULL;
476 
477         spin_lock(&mode_list_lock);
478         mitem = __find_mode(kind);
479         if (!mitem) {
480                 spin_unlock(&mode_list_lock);
481                 request_module("team-mode-%s", kind);
482                 spin_lock(&mode_list_lock);
483                 mitem = __find_mode(kind);
484         }
485         if (mitem) {
486                 mode = mitem->mode;
487                 if (!try_module_get(mode->owner))
488                         mode = NULL;
489         }
490 
491         spin_unlock(&mode_list_lock);
492         return mode;
493 }
494 
495 static void team_mode_put(const struct team_mode *mode)
496 {
497         module_put(mode->owner);
498 }
499 
500 static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
501 {
502         dev_kfree_skb_any(skb);
503         return false;
504 }
505 
506 static rx_handler_result_t team_dummy_receive(struct team *team,
507                                               struct team_port *port,
508                                               struct sk_buff *skb)
509 {
510         return RX_HANDLER_ANOTHER;
511 }
512 
513 static const struct team_mode __team_no_mode = {
514         .kind           = "*NOMODE*",
515 };
516 
517 static bool team_is_mode_set(struct team *team)
518 {
519         return team->mode != &__team_no_mode;
520 }
521 
522 static void team_set_no_mode(struct team *team)
523 {
524         team->user_carrier_enabled = false;
525         team->mode = &__team_no_mode;
526 }
527 
528 static void team_adjust_ops(struct team *team)
529 {
530         /*
531          * To avoid checks in rx/tx skb paths, ensure here that non-null and
532          * correct ops are always set.
533          */
534 
535         if (!team->en_port_count || !team_is_mode_set(team) ||
536             !team->mode->ops->transmit)
537                 team->ops.transmit = team_dummy_transmit;
538         else
539                 team->ops.transmit = team->mode->ops->transmit;
540 
541         if (!team->en_port_count || !team_is_mode_set(team) ||
542             !team->mode->ops->receive)
543                 team->ops.receive = team_dummy_receive;
544         else
545                 team->ops.receive = team->mode->ops->receive;
546 }
547 
548 /*
549  * We can benefit from the fact that it's ensured no port is present
550  * at the time of mode change. Therefore no packets are in fly so there's no
551  * need to set mode operations in any special way.
552  */
553 static int __team_change_mode(struct team *team,
554                               const struct team_mode *new_mode)
555 {
556         /* Check if mode was previously set and do cleanup if so */
557         if (team_is_mode_set(team)) {
558                 void (*exit_op)(struct team *team) = team->ops.exit;
559 
560                 /* Clear ops area so no callback is called any longer */
561                 memset(&team->ops, 0, sizeof(struct team_mode_ops));
562                 team_adjust_ops(team);
563 
564                 if (exit_op)
565                         exit_op(team);
566                 team_mode_put(team->mode);
567                 team_set_no_mode(team);
568                 /* zero private data area */
569                 memset(&team->mode_priv, 0,
570                        sizeof(struct team) - offsetof(struct team, mode_priv));
571         }
572 
573         if (!new_mode)
574                 return 0;
575 
576         if (new_mode->ops->init) {
577                 int err;
578 
579                 err = new_mode->ops->init(team);
580                 if (err)
581                         return err;
582         }
583 
584         team->mode = new_mode;
585         memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
586         team_adjust_ops(team);
587 
588         return 0;
589 }
590 
591 static int team_change_mode(struct team *team, const char *kind)
592 {
593         const struct team_mode *new_mode;
594         struct net_device *dev = team->dev;
595         int err;
596 
597         if (!list_empty(&team->port_list)) {
598                 netdev_err(dev, "No ports can be present during mode change\n");
599                 return -EBUSY;
600         }
601 
602         if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) {
603                 netdev_err(dev, "Unable to change to the same mode the team is in\n");
604                 return -EINVAL;
605         }
606 
607         new_mode = team_mode_get(kind);
608         if (!new_mode) {
609                 netdev_err(dev, "Mode \"%s\" not found\n", kind);
610                 return -EINVAL;
611         }
612 
613         err = __team_change_mode(team, new_mode);
614         if (err) {
615                 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
616                 team_mode_put(new_mode);
617                 return err;
618         }
619 
620         netdev_info(dev, "Mode changed to \"%s\"\n", kind);
621         return 0;
622 }
623 
624 
625 /*********************
626  * Peers notification
627  *********************/
628 
629 static void team_notify_peers_work(struct work_struct *work)
630 {
631         struct team *team;
632 
633         team = container_of(work, struct team, notify_peers.dw.work);
634 
635         if (!rtnl_trylock()) {
636                 schedule_delayed_work(&team->notify_peers.dw, 0);
637                 return;
638         }
639         call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, team->dev);
640         rtnl_unlock();
641         if (!atomic_dec_and_test(&team->notify_peers.count_pending))
642                 schedule_delayed_work(&team->notify_peers.dw,
643                                       msecs_to_jiffies(team->notify_peers.interval));
644 }
645 
646 static void team_notify_peers(struct team *team)
647 {
648         if (!team->notify_peers.count || !netif_running(team->dev))
649                 return;
650         atomic_add(team->notify_peers.count, &team->notify_peers.count_pending);
651         schedule_delayed_work(&team->notify_peers.dw, 0);
652 }
653 
654 static void team_notify_peers_init(struct team *team)
655 {
656         INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work);
657 }
658 
659 static void team_notify_peers_fini(struct team *team)
660 {
661         cancel_delayed_work_sync(&team->notify_peers.dw);
662 }
663 
664 
665 /*******************************
666  * Send multicast group rejoins
667  *******************************/
668 
669 static void team_mcast_rejoin_work(struct work_struct *work)
670 {
671         struct team *team;
672 
673         team = container_of(work, struct team, mcast_rejoin.dw.work);
674 
675         if (!rtnl_trylock()) {
676                 schedule_delayed_work(&team->mcast_rejoin.dw, 0);
677                 return;
678         }
679         call_netdevice_notifiers(NETDEV_RESEND_IGMP, team->dev);
680         rtnl_unlock();
681         if (!atomic_dec_and_test(&team->mcast_rejoin.count_pending))
682                 schedule_delayed_work(&team->mcast_rejoin.dw,
683                                       msecs_to_jiffies(team->mcast_rejoin.interval));
684 }
685 
686 static void team_mcast_rejoin(struct team *team)
687 {
688         if (!team->mcast_rejoin.count || !netif_running(team->dev))
689                 return;
690         atomic_add(team->mcast_rejoin.count, &team->mcast_rejoin.count_pending);
691         schedule_delayed_work(&team->mcast_rejoin.dw, 0);
692 }
693 
694 static void team_mcast_rejoin_init(struct team *team)
695 {
696         INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work);
697 }
698 
699 static void team_mcast_rejoin_fini(struct team *team)
700 {
701         cancel_delayed_work_sync(&team->mcast_rejoin.dw);
702 }
703 
704 
705 /************************
706  * Rx path frame handler
707  ************************/
708 
709 /* note: already called with rcu_read_lock */
710 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
711 {
712         struct sk_buff *skb = *pskb;
713         struct team_port *port;
714         struct team *team;
715         rx_handler_result_t res;
716 
717         skb = skb_share_check(skb, GFP_ATOMIC);
718         if (!skb)
719                 return RX_HANDLER_CONSUMED;
720 
721         *pskb = skb;
722 
723         port = team_port_get_rcu(skb->dev);
724         team = port->team;
725         if (!team_port_enabled(port)) {
726                 /* allow exact match delivery for disabled ports */
727                 res = RX_HANDLER_EXACT;
728         } else {
729                 res = team->ops.receive(team, port, skb);
730         }
731         if (res == RX_HANDLER_ANOTHER) {
732                 struct team_pcpu_stats *pcpu_stats;
733 
734                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
735                 u64_stats_update_begin(&pcpu_stats->syncp);
736                 pcpu_stats->rx_packets++;
737                 pcpu_stats->rx_bytes += skb->len;
738                 if (skb->pkt_type == PACKET_MULTICAST)
739                         pcpu_stats->rx_multicast++;
740                 u64_stats_update_end(&pcpu_stats->syncp);
741 
742                 skb->dev = team->dev;
743         } else {
744                 this_cpu_inc(team->pcpu_stats->rx_dropped);
745         }
746 
747         return res;
748 }
749 
750 
751 /*************************************
752  * Multiqueue Tx port select override
753  *************************************/
754 
755 static int team_queue_override_init(struct team *team)
756 {
757         struct list_head *listarr;
758         unsigned int queue_cnt = team->dev->num_tx_queues - 1;
759         unsigned int i;
760 
761         if (!queue_cnt)
762                 return 0;
763         listarr = kmalloc(sizeof(struct list_head) * queue_cnt, GFP_KERNEL);
764         if (!listarr)
765                 return -ENOMEM;
766         team->qom_lists = listarr;
767         for (i = 0; i < queue_cnt; i++)
768                 INIT_LIST_HEAD(listarr++);
769         return 0;
770 }
771 
772 static void team_queue_override_fini(struct team *team)
773 {
774         kfree(team->qom_lists);
775 }
776 
777 static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
778 {
779         return &team->qom_lists[queue_id - 1];
780 }
781 
782 /*
783  * note: already called with rcu_read_lock
784  */
785 static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
786 {
787         struct list_head *qom_list;
788         struct team_port *port;
789 
790         if (!team->queue_override_enabled || !skb->queue_mapping)
791                 return false;
792         qom_list = __team_get_qom_list(team, skb->queue_mapping);
793         list_for_each_entry_rcu(port, qom_list, qom_list) {
794                 if (!team_dev_queue_xmit(team, port, skb))
795                         return true;
796         }
797         return false;
798 }
799 
800 static void __team_queue_override_port_del(struct team *team,
801                                            struct team_port *port)
802 {
803         if (!port->queue_id)
804                 return;
805         list_del_rcu(&port->qom_list);
806 }
807 
808 static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
809                                                       struct team_port *cur)
810 {
811         if (port->priority < cur->priority)
812                 return true;
813         if (port->priority > cur->priority)
814                 return false;
815         if (port->index < cur->index)
816                 return true;
817         return false;
818 }
819 
820 static void __team_queue_override_port_add(struct team *team,
821                                            struct team_port *port)
822 {
823         struct team_port *cur;
824         struct list_head *qom_list;
825         struct list_head *node;
826 
827         if (!port->queue_id)
828                 return;
829         qom_list = __team_get_qom_list(team, port->queue_id);
830         node = qom_list;
831         list_for_each_entry(cur, qom_list, qom_list) {
832                 if (team_queue_override_port_has_gt_prio_than(port, cur))
833                         break;
834                 node = &cur->qom_list;
835         }
836         list_add_tail_rcu(&port->qom_list, node);
837 }
838 
839 static void __team_queue_override_enabled_check(struct team *team)
840 {
841         struct team_port *port;
842         bool enabled = false;
843 
844         list_for_each_entry(port, &team->port_list, list) {
845                 if (port->queue_id) {
846                         enabled = true;
847                         break;
848                 }
849         }
850         if (enabled == team->queue_override_enabled)
851                 return;
852         netdev_dbg(team->dev, "%s queue override\n",
853                    enabled ? "Enabling" : "Disabling");
854         team->queue_override_enabled = enabled;
855 }
856 
857 static void team_queue_override_port_prio_changed(struct team *team,
858                                                   struct team_port *port)
859 {
860         if (!port->queue_id || team_port_enabled(port))
861                 return;
862         __team_queue_override_port_del(team, port);
863         __team_queue_override_port_add(team, port);
864         __team_queue_override_enabled_check(team);
865 }
866 
867 static void team_queue_override_port_change_queue_id(struct team *team,
868                                                      struct team_port *port,
869                                                      u16 new_queue_id)
870 {
871         if (team_port_enabled(port)) {
872                 __team_queue_override_port_del(team, port);
873                 port->queue_id = new_queue_id;
874                 __team_queue_override_port_add(team, port);
875                 __team_queue_override_enabled_check(team);
876         } else {
877                 port->queue_id = new_queue_id;
878         }
879 }
880 
881 static void team_queue_override_port_add(struct team *team,
882                                          struct team_port *port)
883 {
884         __team_queue_override_port_add(team, port);
885         __team_queue_override_enabled_check(team);
886 }
887 
888 static void team_queue_override_port_del(struct team *team,
889                                          struct team_port *port)
890 {
891         __team_queue_override_port_del(team, port);
892         __team_queue_override_enabled_check(team);
893 }
894 
895 
896 /****************
897  * Port handling
898  ****************/
899 
900 static bool team_port_find(const struct team *team,
901                            const struct team_port *port)
902 {
903         struct team_port *cur;
904 
905         list_for_each_entry(cur, &team->port_list, list)
906                 if (cur == port)
907                         return true;
908         return false;
909 }
910 
911 /*
912  * Enable/disable port by adding to enabled port hashlist and setting
913  * port->index (Might be racy so reader could see incorrect ifindex when
914  * processing a flying packet, but that is not a problem). Write guarded
915  * by team->lock.
916  */
917 static void team_port_enable(struct team *team,
918                              struct team_port *port)
919 {
920         if (team_port_enabled(port))
921                 return;
922         port->index = team->en_port_count++;
923         hlist_add_head_rcu(&port->hlist,
924                            team_port_index_hash(team, port->index));
925         team_adjust_ops(team);
926         team_queue_override_port_add(team, port);
927         if (team->ops.port_enabled)
928                 team->ops.port_enabled(team, port);
929         team_notify_peers(team);
930         team_mcast_rejoin(team);
931 }
932 
933 static void __reconstruct_port_hlist(struct team *team, int rm_index)
934 {
935         int i;
936         struct team_port *port;
937 
938         for (i = rm_index + 1; i < team->en_port_count; i++) {
939                 port = team_get_port_by_index(team, i);
940                 hlist_del_rcu(&port->hlist);
941                 port->index--;
942                 hlist_add_head_rcu(&port->hlist,
943                                    team_port_index_hash(team, port->index));
944         }
945 }
946 
947 static void team_port_disable(struct team *team,
948                               struct team_port *port)
949 {
950         if (!team_port_enabled(port))
951                 return;
952         if (team->ops.port_disabled)
953                 team->ops.port_disabled(team, port);
954         hlist_del_rcu(&port->hlist);
955         __reconstruct_port_hlist(team, port->index);
956         port->index = -1;
957         team->en_port_count--;
958         team_queue_override_port_del(team, port);
959         team_adjust_ops(team);
960         team_notify_peers(team);
961         team_mcast_rejoin(team);
962 }
963 
964 #define TEAM_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \
965                             NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
966                             NETIF_F_HIGHDMA | NETIF_F_LRO)
967 
968 static void __team_compute_features(struct team *team)
969 {
970         struct team_port *port;
971         u32 vlan_features = TEAM_VLAN_FEATURES & NETIF_F_ALL_FOR_ALL;
972         unsigned short max_hard_header_len = ETH_HLEN;
973         unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE |
974                                         IFF_XMIT_DST_RELEASE_PERM;
975 
976         list_for_each_entry(port, &team->port_list, list) {
977                 vlan_features = netdev_increment_features(vlan_features,
978                                         port->dev->vlan_features,
979                                         TEAM_VLAN_FEATURES);
980 
981                 dst_release_flag &= port->dev->priv_flags;
982                 if (port->dev->hard_header_len > max_hard_header_len)
983                         max_hard_header_len = port->dev->hard_header_len;
984         }
985 
986         team->dev->vlan_features = vlan_features;
987         team->dev->hard_header_len = max_hard_header_len;
988 
989         team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
990         if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
991                 team->dev->priv_flags |= IFF_XMIT_DST_RELEASE;
992 
993         netdev_change_features(team->dev);
994 }
995 
996 static void team_compute_features(struct team *team)
997 {
998         mutex_lock(&team->lock);
999         __team_compute_features(team);
1000         mutex_unlock(&team->lock);
1001 }
1002 
1003 static int team_port_enter(struct team *team, struct team_port *port)
1004 {
1005         int err = 0;
1006 
1007         dev_hold(team->dev);
1008         if (team->ops.port_enter) {
1009                 err = team->ops.port_enter(team, port);
1010                 if (err) {
1011                         netdev_err(team->dev, "Device %s failed to enter team mode\n",
1012                                    port->dev->name);
1013                         goto err_port_enter;
1014                 }
1015         }
1016 
1017         return 0;
1018 
1019 err_port_enter:
1020         dev_put(team->dev);
1021 
1022         return err;
1023 }
1024 
1025 static void team_port_leave(struct team *team, struct team_port *port)
1026 {
1027         if (team->ops.port_leave)
1028                 team->ops.port_leave(team, port);
1029         dev_put(team->dev);
1030 }
1031 
1032 #ifdef CONFIG_NET_POLL_CONTROLLER
1033 static int team_port_enable_netpoll(struct team *team, struct team_port *port)
1034 {
1035         struct netpoll *np;
1036         int err;
1037 
1038         if (!team->dev->npinfo)
1039                 return 0;
1040 
1041         np = kzalloc(sizeof(*np), GFP_KERNEL);
1042         if (!np)
1043                 return -ENOMEM;
1044 
1045         err = __netpoll_setup(np, port->dev);
1046         if (err) {
1047                 kfree(np);
1048                 return err;
1049         }
1050         port->np = np;
1051         return err;
1052 }
1053 
1054 static void team_port_disable_netpoll(struct team_port *port)
1055 {
1056         struct netpoll *np = port->np;
1057 
1058         if (!np)
1059                 return;
1060         port->np = NULL;
1061 
1062         /* Wait for transmitting packets to finish before freeing. */
1063         synchronize_rcu_bh();
1064         __netpoll_cleanup(np);
1065         kfree(np);
1066 }
1067 #else
1068 static int team_port_enable_netpoll(struct team *team, struct team_port *port)
1069 {
1070         return 0;
1071 }
1072 static void team_port_disable_netpoll(struct team_port *port)
1073 {
1074 }
1075 #endif
1076 
1077 static int team_upper_dev_link(struct net_device *dev,
1078                                struct net_device *port_dev)
1079 {
1080         int err;
1081 
1082         err = netdev_master_upper_dev_link(port_dev, dev);
1083         if (err)
1084                 return err;
1085         port_dev->priv_flags |= IFF_TEAM_PORT;
1086         return 0;
1087 }
1088 
1089 static void team_upper_dev_unlink(struct net_device *dev,
1090                                   struct net_device *port_dev)
1091 {
1092         netdev_upper_dev_unlink(port_dev, dev);
1093         port_dev->priv_flags &= ~IFF_TEAM_PORT;
1094 }
1095 
1096 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1097 static int team_dev_type_check_change(struct net_device *dev,
1098                                       struct net_device *port_dev);
1099 
1100 static int team_port_add(struct team *team, struct net_device *port_dev)
1101 {
1102         struct net_device *dev = team->dev;
1103         struct team_port *port;
1104         char *portname = port_dev->name;
1105         int err;
1106 
1107         if (port_dev->flags & IFF_LOOPBACK) {
1108                 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1109                            portname);
1110                 return -EINVAL;
1111         }
1112 
1113         if (team_port_exists(port_dev)) {
1114                 netdev_err(dev, "Device %s is already a port "
1115                                 "of a team device\n", portname);
1116                 return -EBUSY;
1117         }
1118 
1119         if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1120             vlan_uses_dev(dev)) {
1121                 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1122                            portname);
1123                 return -EPERM;
1124         }
1125 
1126         err = team_dev_type_check_change(dev, port_dev);
1127         if (err)
1128                 return err;
1129 
1130         if (port_dev->flags & IFF_UP) {
1131                 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1132                            portname);
1133                 return -EBUSY;
1134         }
1135 
1136         port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1137                        GFP_KERNEL);
1138         if (!port)
1139                 return -ENOMEM;
1140 
1141         port->dev = port_dev;
1142         port->team = team;
1143         INIT_LIST_HEAD(&port->qom_list);
1144 
1145         port->orig.mtu = port_dev->mtu;
1146         err = dev_set_mtu(port_dev, dev->mtu);
1147         if (err) {
1148                 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1149                 goto err_set_mtu;
1150         }
1151 
1152         memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1153 
1154         err = team_port_enter(team, port);
1155         if (err) {
1156                 netdev_err(dev, "Device %s failed to enter team mode\n",
1157                            portname);
1158                 goto err_port_enter;
1159         }
1160 
1161         err = dev_open(port_dev);
1162         if (err) {
1163                 netdev_dbg(dev, "Device %s opening failed\n",
1164                            portname);
1165                 goto err_dev_open;
1166         }
1167 
1168         err = vlan_vids_add_by_dev(port_dev, dev);
1169         if (err) {
1170                 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1171                                 portname);
1172                 goto err_vids_add;
1173         }
1174 
1175         err = team_port_enable_netpoll(team, port);
1176         if (err) {
1177                 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1178                            portname);
1179                 goto err_enable_netpoll;
1180         }
1181 
1182         err = netdev_rx_handler_register(port_dev, team_handle_frame,
1183                                          port);
1184         if (err) {
1185                 netdev_err(dev, "Device %s failed to register rx_handler\n",
1186                            portname);
1187                 goto err_handler_register;
1188         }
1189 
1190         err = team_upper_dev_link(dev, port_dev);
1191         if (err) {
1192                 netdev_err(dev, "Device %s failed to set upper link\n",
1193                            portname);
1194                 goto err_set_upper_link;
1195         }
1196 
1197         err = __team_option_inst_add_port(team, port);
1198         if (err) {
1199                 netdev_err(dev, "Device %s failed to add per-port options\n",
1200                            portname);
1201                 goto err_option_port_add;
1202         }
1203 
1204         port->index = -1;
1205         list_add_tail_rcu(&port->list, &team->port_list);
1206         team_port_enable(team, port);
1207         __team_compute_features(team);
1208         __team_port_change_port_added(port, !!netif_carrier_ok(port_dev));
1209         __team_options_change_check(team);
1210 
1211         netdev_info(dev, "Port device %s added\n", portname);
1212 
1213         return 0;
1214 
1215 err_option_port_add:
1216         team_upper_dev_unlink(dev, port_dev);
1217 
1218 err_set_upper_link:
1219         netdev_rx_handler_unregister(port_dev);
1220 
1221 err_handler_register:
1222         team_port_disable_netpoll(port);
1223 
1224 err_enable_netpoll:
1225         vlan_vids_del_by_dev(port_dev, dev);
1226 
1227 err_vids_add:
1228         dev_close(port_dev);
1229 
1230 err_dev_open:
1231         team_port_leave(team, port);
1232         team_port_set_orig_dev_addr(port);
1233 
1234 err_port_enter:
1235         dev_set_mtu(port_dev, port->orig.mtu);
1236 
1237 err_set_mtu:
1238         kfree(port);
1239 
1240         return err;
1241 }
1242 
1243 static void __team_port_change_port_removed(struct team_port *port);
1244 
1245 static int team_port_del(struct team *team, struct net_device *port_dev)
1246 {
1247         struct net_device *dev = team->dev;
1248         struct team_port *port;
1249         char *portname = port_dev->name;
1250 
1251         port = team_port_get_rtnl(port_dev);
1252         if (!port || !team_port_find(team, port)) {
1253                 netdev_err(dev, "Device %s does not act as a port of this team\n",
1254                            portname);
1255                 return -ENOENT;
1256         }
1257 
1258         team_port_disable(team, port);
1259         list_del_rcu(&port->list);
1260         team_upper_dev_unlink(dev, port_dev);
1261         netdev_rx_handler_unregister(port_dev);
1262         team_port_disable_netpoll(port);
1263         vlan_vids_del_by_dev(port_dev, dev);
1264         dev_uc_unsync(port_dev, dev);
1265         dev_mc_unsync(port_dev, dev);
1266         dev_close(port_dev);
1267         team_port_leave(team, port);
1268 
1269         __team_option_inst_mark_removed_port(team, port);
1270         __team_options_change_check(team);
1271         __team_option_inst_del_port(team, port);
1272         __team_port_change_port_removed(port);
1273 
1274         team_port_set_orig_dev_addr(port);
1275         dev_set_mtu(port_dev, port->orig.mtu);
1276         kfree_rcu(port, rcu);
1277         netdev_info(dev, "Port device %s removed\n", portname);
1278         __team_compute_features(team);
1279 
1280         return 0;
1281 }
1282 
1283 
1284 /*****************
1285  * Net device ops
1286  *****************/
1287 
1288 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1289 {
1290         ctx->data.str_val = team->mode->kind;
1291         return 0;
1292 }
1293 
1294 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1295 {
1296         return team_change_mode(team, ctx->data.str_val);
1297 }
1298 
1299 static int team_notify_peers_count_get(struct team *team,
1300                                        struct team_gsetter_ctx *ctx)
1301 {
1302         ctx->data.u32_val = team->notify_peers.count;
1303         return 0;
1304 }
1305 
1306 static int team_notify_peers_count_set(struct team *team,
1307                                        struct team_gsetter_ctx *ctx)
1308 {
1309         team->notify_peers.count = ctx->data.u32_val;
1310         return 0;
1311 }
1312 
1313 static int team_notify_peers_interval_get(struct team *team,
1314                                           struct team_gsetter_ctx *ctx)
1315 {
1316         ctx->data.u32_val = team->notify_peers.interval;
1317         return 0;
1318 }
1319 
1320 static int team_notify_peers_interval_set(struct team *team,
1321                                           struct team_gsetter_ctx *ctx)
1322 {
1323         team->notify_peers.interval = ctx->data.u32_val;
1324         return 0;
1325 }
1326 
1327 static int team_mcast_rejoin_count_get(struct team *team,
1328                                        struct team_gsetter_ctx *ctx)
1329 {
1330         ctx->data.u32_val = team->mcast_rejoin.count;
1331         return 0;
1332 }
1333 
1334 static int team_mcast_rejoin_count_set(struct team *team,
1335                                        struct team_gsetter_ctx *ctx)
1336 {
1337         team->mcast_rejoin.count = ctx->data.u32_val;
1338         return 0;
1339 }
1340 
1341 static int team_mcast_rejoin_interval_get(struct team *team,
1342                                           struct team_gsetter_ctx *ctx)
1343 {
1344         ctx->data.u32_val = team->mcast_rejoin.interval;
1345         return 0;
1346 }
1347 
1348 static int team_mcast_rejoin_interval_set(struct team *team,
1349                                           struct team_gsetter_ctx *ctx)
1350 {
1351         team->mcast_rejoin.interval = ctx->data.u32_val;
1352         return 0;
1353 }
1354 
1355 static int team_port_en_option_get(struct team *team,
1356                                    struct team_gsetter_ctx *ctx)
1357 {
1358         struct team_port *port = ctx->info->port;
1359 
1360         ctx->data.bool_val = team_port_enabled(port);
1361         return 0;
1362 }
1363 
1364 static int team_port_en_option_set(struct team *team,
1365                                    struct team_gsetter_ctx *ctx)
1366 {
1367         struct team_port *port = ctx->info->port;
1368 
1369         if (ctx->data.bool_val)
1370                 team_port_enable(team, port);
1371         else
1372                 team_port_disable(team, port);
1373         return 0;
1374 }
1375 
1376 static int team_user_linkup_option_get(struct team *team,
1377                                        struct team_gsetter_ctx *ctx)
1378 {
1379         struct team_port *port = ctx->info->port;
1380 
1381         ctx->data.bool_val = port->user.linkup;
1382         return 0;
1383 }
1384 
1385 static void __team_carrier_check(struct team *team);
1386 
1387 static int team_user_linkup_option_set(struct team *team,
1388                                        struct team_gsetter_ctx *ctx)
1389 {
1390         struct team_port *port = ctx->info->port;
1391 
1392         port->user.linkup = ctx->data.bool_val;
1393         team_refresh_port_linkup(port);
1394         __team_carrier_check(port->team);
1395         return 0;
1396 }
1397 
1398 static int team_user_linkup_en_option_get(struct team *team,
1399                                           struct team_gsetter_ctx *ctx)
1400 {
1401         struct team_port *port = ctx->info->port;
1402 
1403         ctx->data.bool_val = port->user.linkup_enabled;
1404         return 0;
1405 }
1406 
1407 static int team_user_linkup_en_option_set(struct team *team,
1408                                           struct team_gsetter_ctx *ctx)
1409 {
1410         struct team_port *port = ctx->info->port;
1411 
1412         port->user.linkup_enabled = ctx->data.bool_val;
1413         team_refresh_port_linkup(port);
1414         __team_carrier_check(port->team);
1415         return 0;
1416 }
1417 
1418 static int team_priority_option_get(struct team *team,
1419                                     struct team_gsetter_ctx *ctx)
1420 {
1421         struct team_port *port = ctx->info->port;
1422 
1423         ctx->data.s32_val = port->priority;
1424         return 0;
1425 }
1426 
1427 static int team_priority_option_set(struct team *team,
1428                                     struct team_gsetter_ctx *ctx)
1429 {
1430         struct team_port *port = ctx->info->port;
1431         s32 priority = ctx->data.s32_val;
1432 
1433         if (port->priority == priority)
1434                 return 0;
1435         port->priority = priority;
1436         team_queue_override_port_prio_changed(team, port);
1437         return 0;
1438 }
1439 
1440 static int team_queue_id_option_get(struct team *team,
1441                                     struct team_gsetter_ctx *ctx)
1442 {
1443         struct team_port *port = ctx->info->port;
1444 
1445         ctx->data.u32_val = port->queue_id;
1446         return 0;
1447 }
1448 
1449 static int team_queue_id_option_set(struct team *team,
1450                                     struct team_gsetter_ctx *ctx)
1451 {
1452         struct team_port *port = ctx->info->port;
1453         u16 new_queue_id = ctx->data.u32_val;
1454 
1455         if (port->queue_id == new_queue_id)
1456                 return 0;
1457         if (new_queue_id >= team->dev->real_num_tx_queues)
1458                 return -EINVAL;
1459         team_queue_override_port_change_queue_id(team, port, new_queue_id);
1460         return 0;
1461 }
1462 
1463 static const struct team_option team_options[] = {
1464         {
1465                 .name = "mode",
1466                 .type = TEAM_OPTION_TYPE_STRING,
1467                 .getter = team_mode_option_get,
1468                 .setter = team_mode_option_set,
1469         },
1470         {
1471                 .name = "notify_peers_count",
1472                 .type = TEAM_OPTION_TYPE_U32,
1473                 .getter = team_notify_peers_count_get,
1474                 .setter = team_notify_peers_count_set,
1475         },
1476         {
1477                 .name = "notify_peers_interval",
1478                 .type = TEAM_OPTION_TYPE_U32,
1479                 .getter = team_notify_peers_interval_get,
1480                 .setter = team_notify_peers_interval_set,
1481         },
1482         {
1483                 .name = "mcast_rejoin_count",
1484                 .type = TEAM_OPTION_TYPE_U32,
1485                 .getter = team_mcast_rejoin_count_get,
1486                 .setter = team_mcast_rejoin_count_set,
1487         },
1488         {
1489                 .name = "mcast_rejoin_interval",
1490                 .type = TEAM_OPTION_TYPE_U32,
1491                 .getter = team_mcast_rejoin_interval_get,
1492                 .setter = team_mcast_rejoin_interval_set,
1493         },
1494         {
1495                 .name = "enabled",
1496                 .type = TEAM_OPTION_TYPE_BOOL,
1497                 .per_port = true,
1498                 .getter = team_port_en_option_get,
1499                 .setter = team_port_en_option_set,
1500         },
1501         {
1502                 .name = "user_linkup",
1503                 .type = TEAM_OPTION_TYPE_BOOL,
1504                 .per_port = true,
1505                 .getter = team_user_linkup_option_get,
1506                 .setter = team_user_linkup_option_set,
1507         },
1508         {
1509                 .name = "user_linkup_enabled",
1510                 .type = TEAM_OPTION_TYPE_BOOL,
1511                 .per_port = true,
1512                 .getter = team_user_linkup_en_option_get,
1513                 .setter = team_user_linkup_en_option_set,
1514         },
1515         {
1516                 .name = "priority",
1517                 .type = TEAM_OPTION_TYPE_S32,
1518                 .per_port = true,
1519                 .getter = team_priority_option_get,
1520                 .setter = team_priority_option_set,
1521         },
1522         {
1523                 .name = "queue_id",
1524                 .type = TEAM_OPTION_TYPE_U32,
1525                 .per_port = true,
1526                 .getter = team_queue_id_option_get,
1527                 .setter = team_queue_id_option_set,
1528         },
1529 };
1530 
1531 static struct lock_class_key team_netdev_xmit_lock_key;
1532 static struct lock_class_key team_netdev_addr_lock_key;
1533 static struct lock_class_key team_tx_busylock_key;
1534 
1535 static void team_set_lockdep_class_one(struct net_device *dev,
1536                                        struct netdev_queue *txq,
1537                                        void *unused)
1538 {
1539         lockdep_set_class(&txq->_xmit_lock, &team_netdev_xmit_lock_key);
1540 }
1541 
1542 static void team_set_lockdep_class(struct net_device *dev)
1543 {
1544         lockdep_set_class(&dev->addr_list_lock, &team_netdev_addr_lock_key);
1545         netdev_for_each_tx_queue(dev, team_set_lockdep_class_one, NULL);
1546         dev->qdisc_tx_busylock = &team_tx_busylock_key;
1547 }
1548 
1549 static int team_init(struct net_device *dev)
1550 {
1551         struct team *team = netdev_priv(dev);
1552         int i;
1553         int err;
1554 
1555         team->dev = dev;
1556         mutex_init(&team->lock);
1557         team_set_no_mode(team);
1558 
1559         team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1560         if (!team->pcpu_stats)
1561                 return -ENOMEM;
1562 
1563         for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1564                 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1565         INIT_LIST_HEAD(&team->port_list);
1566         err = team_queue_override_init(team);
1567         if (err)
1568                 goto err_team_queue_override_init;
1569 
1570         team_adjust_ops(team);
1571 
1572         INIT_LIST_HEAD(&team->option_list);
1573         INIT_LIST_HEAD(&team->option_inst_list);
1574 
1575         team_notify_peers_init(team);
1576         team_mcast_rejoin_init(team);
1577 
1578         err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1579         if (err)
1580                 goto err_options_register;
1581         netif_carrier_off(dev);
1582 
1583         team_set_lockdep_class(dev);
1584 
1585         return 0;
1586 
1587 err_options_register:
1588         team_mcast_rejoin_fini(team);
1589         team_notify_peers_fini(team);
1590         team_queue_override_fini(team);
1591 err_team_queue_override_init:
1592         free_percpu(team->pcpu_stats);
1593 
1594         return err;
1595 }
1596 
1597 static void team_uninit(struct net_device *dev)
1598 {
1599         struct team *team = netdev_priv(dev);
1600         struct team_port *port;
1601         struct team_port *tmp;
1602 
1603         mutex_lock(&team->lock);
1604         list_for_each_entry_safe(port, tmp, &team->port_list, list)
1605                 team_port_del(team, port->dev);
1606 
1607         __team_change_mode(team, NULL); /* cleanup */
1608         __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1609         team_mcast_rejoin_fini(team);
1610         team_notify_peers_fini(team);
1611         team_queue_override_fini(team);
1612         mutex_unlock(&team->lock);
1613 }
1614 
1615 static void team_destructor(struct net_device *dev)
1616 {
1617         struct team *team = netdev_priv(dev);
1618 
1619         free_percpu(team->pcpu_stats);
1620         free_netdev(dev);
1621 }
1622 
1623 static int team_open(struct net_device *dev)
1624 {
1625         return 0;
1626 }
1627 
1628 static int team_close(struct net_device *dev)
1629 {
1630         return 0;
1631 }
1632 
1633 /*
1634  * note: already called with rcu_read_lock
1635  */
1636 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1637 {
1638         struct team *team = netdev_priv(dev);
1639         bool tx_success;
1640         unsigned int len = skb->len;
1641 
1642         tx_success = team_queue_override_transmit(team, skb);
1643         if (!tx_success)
1644                 tx_success = team->ops.transmit(team, skb);
1645         if (tx_success) {
1646                 struct team_pcpu_stats *pcpu_stats;
1647 
1648                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1649                 u64_stats_update_begin(&pcpu_stats->syncp);
1650                 pcpu_stats->tx_packets++;
1651                 pcpu_stats->tx_bytes += len;
1652                 u64_stats_update_end(&pcpu_stats->syncp);
1653         } else {
1654                 this_cpu_inc(team->pcpu_stats->tx_dropped);
1655         }
1656 
1657         return NETDEV_TX_OK;
1658 }
1659 
1660 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1661                              void *accel_priv, select_queue_fallback_t fallback)
1662 {
1663         /*
1664          * This helper function exists to help dev_pick_tx get the correct
1665          * destination queue.  Using a helper function skips a call to
1666          * skb_tx_hash and will put the skbs in the queue we expect on their
1667          * way down to the team driver.
1668          */
1669         u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1670 
1671         /*
1672          * Save the original txq to restore before passing to the driver
1673          */
1674         qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1675 
1676         if (unlikely(txq >= dev->real_num_tx_queues)) {
1677                 do {
1678                         txq -= dev->real_num_tx_queues;
1679                 } while (txq >= dev->real_num_tx_queues);
1680         }
1681         return txq;
1682 }
1683 
1684 static void team_change_rx_flags(struct net_device *dev, int change)
1685 {
1686         struct team *team = netdev_priv(dev);
1687         struct team_port *port;
1688         int inc;
1689 
1690         rcu_read_lock();
1691         list_for_each_entry_rcu(port, &team->port_list, list) {
1692                 if (change & IFF_PROMISC) {
1693                         inc = dev->flags & IFF_PROMISC ? 1 : -1;
1694                         dev_set_promiscuity(port->dev, inc);
1695                 }
1696                 if (change & IFF_ALLMULTI) {
1697                         inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1698                         dev_set_allmulti(port->dev, inc);
1699                 }
1700         }
1701         rcu_read_unlock();
1702 }
1703 
1704 static void team_set_rx_mode(struct net_device *dev)
1705 {
1706         struct team *team = netdev_priv(dev);
1707         struct team_port *port;
1708 
1709         rcu_read_lock();
1710         list_for_each_entry_rcu(port, &team->port_list, list) {
1711                 dev_uc_sync_multiple(port->dev, dev);
1712                 dev_mc_sync_multiple(port->dev, dev);
1713         }
1714         rcu_read_unlock();
1715 }
1716 
1717 static int team_set_mac_address(struct net_device *dev, void *p)
1718 {
1719         struct sockaddr *addr = p;
1720         struct team *team = netdev_priv(dev);
1721         struct team_port *port;
1722 
1723         if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1724                 return -EADDRNOTAVAIL;
1725         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1726         rcu_read_lock();
1727         list_for_each_entry_rcu(port, &team->port_list, list)
1728                 if (team->ops.port_change_dev_addr)
1729                         team->ops.port_change_dev_addr(team, port);
1730         rcu_read_unlock();
1731         return 0;
1732 }
1733 
1734 static int team_change_mtu(struct net_device *dev, int new_mtu)
1735 {
1736         struct team *team = netdev_priv(dev);
1737         struct team_port *port;
1738         int err;
1739 
1740         /*
1741          * Alhough this is reader, it's guarded by team lock. It's not possible
1742          * to traverse list in reverse under rcu_read_lock
1743          */
1744         mutex_lock(&team->lock);
1745         team->port_mtu_change_allowed = true;
1746         list_for_each_entry(port, &team->port_list, list) {
1747                 err = dev_set_mtu(port->dev, new_mtu);
1748                 if (err) {
1749                         netdev_err(dev, "Device %s failed to change mtu",
1750                                    port->dev->name);
1751                         goto unwind;
1752                 }
1753         }
1754         team->port_mtu_change_allowed = false;
1755         mutex_unlock(&team->lock);
1756 
1757         dev->mtu = new_mtu;
1758 
1759         return 0;
1760 
1761 unwind:
1762         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1763                 dev_set_mtu(port->dev, dev->mtu);
1764         team->port_mtu_change_allowed = false;
1765         mutex_unlock(&team->lock);
1766 
1767         return err;
1768 }
1769 
1770 static struct rtnl_link_stats64 *
1771 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1772 {
1773         struct team *team = netdev_priv(dev);
1774         struct team_pcpu_stats *p;
1775         u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1776         u32 rx_dropped = 0, tx_dropped = 0;
1777         unsigned int start;
1778         int i;
1779 
1780         for_each_possible_cpu(i) {
1781                 p = per_cpu_ptr(team->pcpu_stats, i);
1782                 do {
1783                         start = u64_stats_fetch_begin_irq(&p->syncp);
1784                         rx_packets      = p->rx_packets;
1785                         rx_bytes        = p->rx_bytes;
1786                         rx_multicast    = p->rx_multicast;
1787                         tx_packets      = p->tx_packets;
1788                         tx_bytes        = p->tx_bytes;
1789                 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
1790 
1791                 stats->rx_packets       += rx_packets;
1792                 stats->rx_bytes         += rx_bytes;
1793                 stats->multicast        += rx_multicast;
1794                 stats->tx_packets       += tx_packets;
1795                 stats->tx_bytes         += tx_bytes;
1796                 /*
1797                  * rx_dropped & tx_dropped are u32, updated
1798                  * without syncp protection.
1799                  */
1800                 rx_dropped      += p->rx_dropped;
1801                 tx_dropped      += p->tx_dropped;
1802         }
1803         stats->rx_dropped       = rx_dropped;
1804         stats->tx_dropped       = tx_dropped;
1805         return stats;
1806 }
1807 
1808 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1809 {
1810         struct team *team = netdev_priv(dev);
1811         struct team_port *port;
1812         int err;
1813 
1814         /*
1815          * Alhough this is reader, it's guarded by team lock. It's not possible
1816          * to traverse list in reverse under rcu_read_lock
1817          */
1818         mutex_lock(&team->lock);
1819         list_for_each_entry(port, &team->port_list, list) {
1820                 err = vlan_vid_add(port->dev, proto, vid);
1821                 if (err)
1822                         goto unwind;
1823         }
1824         mutex_unlock(&team->lock);
1825 
1826         return 0;
1827 
1828 unwind:
1829         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1830                 vlan_vid_del(port->dev, proto, vid);
1831         mutex_unlock(&team->lock);
1832 
1833         return err;
1834 }
1835 
1836 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1837 {
1838         struct team *team = netdev_priv(dev);
1839         struct team_port *port;
1840 
1841         rcu_read_lock();
1842         list_for_each_entry_rcu(port, &team->port_list, list)
1843                 vlan_vid_del(port->dev, proto, vid);
1844         rcu_read_unlock();
1845 
1846         return 0;
1847 }
1848 
1849 #ifdef CONFIG_NET_POLL_CONTROLLER
1850 static void team_poll_controller(struct net_device *dev)
1851 {
1852 }
1853 
1854 static void __team_netpoll_cleanup(struct team *team)
1855 {
1856         struct team_port *port;
1857 
1858         list_for_each_entry(port, &team->port_list, list)
1859                 team_port_disable_netpoll(port);
1860 }
1861 
1862 static void team_netpoll_cleanup(struct net_device *dev)
1863 {
1864         struct team *team = netdev_priv(dev);
1865 
1866         mutex_lock(&team->lock);
1867         __team_netpoll_cleanup(team);
1868         mutex_unlock(&team->lock);
1869 }
1870 
1871 static int team_netpoll_setup(struct net_device *dev,
1872                               struct netpoll_info *npifo)
1873 {
1874         struct team *team = netdev_priv(dev);
1875         struct team_port *port;
1876         int err = 0;
1877 
1878         mutex_lock(&team->lock);
1879         list_for_each_entry(port, &team->port_list, list) {
1880                 err = team_port_enable_netpoll(team, port);
1881                 if (err) {
1882                         __team_netpoll_cleanup(team);
1883                         break;
1884                 }
1885         }
1886         mutex_unlock(&team->lock);
1887         return err;
1888 }
1889 #endif
1890 
1891 static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
1892 {
1893         struct team *team = netdev_priv(dev);
1894         int err;
1895 
1896         mutex_lock(&team->lock);
1897         err = team_port_add(team, port_dev);
1898         mutex_unlock(&team->lock);
1899         return err;
1900 }
1901 
1902 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1903 {
1904         struct team *team = netdev_priv(dev);
1905         int err;
1906 
1907         mutex_lock(&team->lock);
1908         err = team_port_del(team, port_dev);
1909         mutex_unlock(&team->lock);
1910         return err;
1911 }
1912 
1913 static netdev_features_t team_fix_features(struct net_device *dev,
1914                                            netdev_features_t features)
1915 {
1916         struct team_port *port;
1917         struct team *team = netdev_priv(dev);
1918         netdev_features_t mask;
1919 
1920         mask = features;
1921         features &= ~NETIF_F_ONE_FOR_ALL;
1922         features |= NETIF_F_ALL_FOR_ALL;
1923 
1924         rcu_read_lock();
1925         list_for_each_entry_rcu(port, &team->port_list, list) {
1926                 features = netdev_increment_features(features,
1927                                                      port->dev->features,
1928                                                      mask);
1929         }
1930         rcu_read_unlock();
1931         return features;
1932 }
1933 
1934 static int team_change_carrier(struct net_device *dev, bool new_carrier)
1935 {
1936         struct team *team = netdev_priv(dev);
1937 
1938         team->user_carrier_enabled = true;
1939 
1940         if (new_carrier)
1941                 netif_carrier_on(dev);
1942         else
1943                 netif_carrier_off(dev);
1944         return 0;
1945 }
1946 
1947 static const struct net_device_ops team_netdev_ops = {
1948         .ndo_init               = team_init,
1949         .ndo_uninit             = team_uninit,
1950         .ndo_open               = team_open,
1951         .ndo_stop               = team_close,
1952         .ndo_start_xmit         = team_xmit,
1953         .ndo_select_queue       = team_select_queue,
1954         .ndo_change_rx_flags    = team_change_rx_flags,
1955         .ndo_set_rx_mode        = team_set_rx_mode,
1956         .ndo_set_mac_address    = team_set_mac_address,
1957         .ndo_change_mtu         = team_change_mtu,
1958         .ndo_get_stats64        = team_get_stats64,
1959         .ndo_vlan_rx_add_vid    = team_vlan_rx_add_vid,
1960         .ndo_vlan_rx_kill_vid   = team_vlan_rx_kill_vid,
1961 #ifdef CONFIG_NET_POLL_CONTROLLER
1962         .ndo_poll_controller    = team_poll_controller,
1963         .ndo_netpoll_setup      = team_netpoll_setup,
1964         .ndo_netpoll_cleanup    = team_netpoll_cleanup,
1965 #endif
1966         .ndo_add_slave          = team_add_slave,
1967         .ndo_del_slave          = team_del_slave,
1968         .ndo_fix_features       = team_fix_features,
1969         .ndo_change_carrier     = team_change_carrier,
1970 };
1971 
1972 /***********************
1973  * ethtool interface
1974  ***********************/
1975 
1976 static void team_ethtool_get_drvinfo(struct net_device *dev,
1977                                      struct ethtool_drvinfo *drvinfo)
1978 {
1979         strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
1980         strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
1981 }
1982 
1983 static const struct ethtool_ops team_ethtool_ops = {
1984         .get_drvinfo            = team_ethtool_get_drvinfo,
1985         .get_link               = ethtool_op_get_link,
1986 };
1987 
1988 /***********************
1989  * rt netlink interface
1990  ***********************/
1991 
1992 static void team_setup_by_port(struct net_device *dev,
1993                                struct net_device *port_dev)
1994 {
1995         dev->header_ops = port_dev->header_ops;
1996         dev->type = port_dev->type;
1997         dev->hard_header_len = port_dev->hard_header_len;
1998         dev->addr_len = port_dev->addr_len;
1999         dev->mtu = port_dev->mtu;
2000         memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2001         eth_hw_addr_inherit(dev, port_dev);
2002 }
2003 
2004 static int team_dev_type_check_change(struct net_device *dev,
2005                                       struct net_device *port_dev)
2006 {
2007         struct team *team = netdev_priv(dev);
2008         char *portname = port_dev->name;
2009         int err;
2010 
2011         if (dev->type == port_dev->type)
2012                 return 0;
2013         if (!list_empty(&team->port_list)) {
2014                 netdev_err(dev, "Device %s is of different type\n", portname);
2015                 return -EBUSY;
2016         }
2017         err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2018         err = notifier_to_errno(err);
2019         if (err) {
2020                 netdev_err(dev, "Refused to change device type\n");
2021                 return err;
2022         }
2023         dev_uc_flush(dev);
2024         dev_mc_flush(dev);
2025         team_setup_by_port(dev, port_dev);
2026         call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2027         return 0;
2028 }
2029 
2030 static void team_setup(struct net_device *dev)
2031 {
2032         ether_setup(dev);
2033 
2034         dev->netdev_ops = &team_netdev_ops;
2035         dev->ethtool_ops = &team_ethtool_ops;
2036         dev->destructor = team_destructor;
2037         dev->tx_queue_len = 0;
2038         dev->flags |= IFF_MULTICAST;
2039         dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2040 
2041         /*
2042          * Indicate we support unicast address filtering. That way core won't
2043          * bring us to promisc mode in case a unicast addr is added.
2044          * Let this up to underlay drivers.
2045          */
2046         dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2047 
2048         dev->features |= NETIF_F_LLTX;
2049         dev->features |= NETIF_F_GRO;
2050 
2051         /* Don't allow team devices to change network namespaces. */
2052         dev->features |= NETIF_F_NETNS_LOCAL;
2053 
2054         dev->hw_features = TEAM_VLAN_FEATURES |
2055                            NETIF_F_HW_VLAN_CTAG_TX |
2056                            NETIF_F_HW_VLAN_CTAG_RX |
2057                            NETIF_F_HW_VLAN_CTAG_FILTER;
2058 
2059         dev->hw_features &= ~(NETIF_F_ALL_CSUM & ~NETIF_F_HW_CSUM);
2060         dev->features |= dev->hw_features;
2061 }
2062 
2063 static int team_newlink(struct net *src_net, struct net_device *dev,
2064                         struct nlattr *tb[], struct nlattr *data[])
2065 {
2066         if (tb[IFLA_ADDRESS] == NULL)
2067                 eth_hw_addr_random(dev);
2068 
2069         return register_netdevice(dev);
2070 }
2071 
2072 static int team_validate(struct nlattr *tb[], struct nlattr *data[])
2073 {
2074         if (tb[IFLA_ADDRESS]) {
2075                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2076                         return -EINVAL;
2077                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2078                         return -EADDRNOTAVAIL;
2079         }
2080         return 0;
2081 }
2082 
2083 static unsigned int team_get_num_tx_queues(void)
2084 {
2085         return TEAM_DEFAULT_NUM_TX_QUEUES;
2086 }
2087 
2088 static unsigned int team_get_num_rx_queues(void)
2089 {
2090         return TEAM_DEFAULT_NUM_RX_QUEUES;
2091 }
2092 
2093 static struct rtnl_link_ops team_link_ops __read_mostly = {
2094         .kind                   = DRV_NAME,
2095         .priv_size              = sizeof(struct team),
2096         .setup                  = team_setup,
2097         .newlink                = team_newlink,
2098         .validate               = team_validate,
2099         .get_num_tx_queues      = team_get_num_tx_queues,
2100         .get_num_rx_queues      = team_get_num_rx_queues,
2101 };
2102 
2103 
2104 /***********************************
2105  * Generic netlink custom interface
2106  ***********************************/
2107 
2108 static struct genl_family team_nl_family = {
2109         .id             = GENL_ID_GENERATE,
2110         .name           = TEAM_GENL_NAME,
2111         .version        = TEAM_GENL_VERSION,
2112         .maxattr        = TEAM_ATTR_MAX,
2113         .netnsok        = true,
2114 };
2115 
2116 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2117         [TEAM_ATTR_UNSPEC]                      = { .type = NLA_UNSPEC, },
2118         [TEAM_ATTR_TEAM_IFINDEX]                = { .type = NLA_U32 },
2119         [TEAM_ATTR_LIST_OPTION]                 = { .type = NLA_NESTED },
2120         [TEAM_ATTR_LIST_PORT]                   = { .type = NLA_NESTED },
2121 };
2122 
2123 static const struct nla_policy
2124 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2125         [TEAM_ATTR_OPTION_UNSPEC]               = { .type = NLA_UNSPEC, },
2126         [TEAM_ATTR_OPTION_NAME] = {
2127                 .type = NLA_STRING,
2128                 .len = TEAM_STRING_MAX_LEN,
2129         },
2130         [TEAM_ATTR_OPTION_CHANGED]              = { .type = NLA_FLAG },
2131         [TEAM_ATTR_OPTION_TYPE]                 = { .type = NLA_U8 },
2132         [TEAM_ATTR_OPTION_DATA]                 = { .type = NLA_BINARY },
2133 };
2134 
2135 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2136 {
2137         struct sk_buff *msg;
2138         void *hdr;
2139         int err;
2140 
2141         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2142         if (!msg)
2143                 return -ENOMEM;
2144 
2145         hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2146                           &team_nl_family, 0, TEAM_CMD_NOOP);
2147         if (!hdr) {
2148                 err = -EMSGSIZE;
2149                 goto err_msg_put;
2150         }
2151 
2152         genlmsg_end(msg, hdr);
2153 
2154         return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2155 
2156 err_msg_put:
2157         nlmsg_free(msg);
2158 
2159         return err;
2160 }
2161 
2162 /*
2163  * Netlink cmd functions should be locked by following two functions.
2164  * Since dev gets held here, that ensures dev won't disappear in between.
2165  */
2166 static struct team *team_nl_team_get(struct genl_info *info)
2167 {
2168         struct net *net = genl_info_net(info);
2169         int ifindex;
2170         struct net_device *dev;
2171         struct team *team;
2172 
2173         if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2174                 return NULL;
2175 
2176         ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2177         dev = dev_get_by_index(net, ifindex);
2178         if (!dev || dev->netdev_ops != &team_netdev_ops) {
2179                 if (dev)
2180                         dev_put(dev);
2181                 return NULL;
2182         }
2183 
2184         team = netdev_priv(dev);
2185         mutex_lock(&team->lock);
2186         return team;
2187 }
2188 
2189 static void team_nl_team_put(struct team *team)
2190 {
2191         mutex_unlock(&team->lock);
2192         dev_put(team->dev);
2193 }
2194 
2195 typedef int team_nl_send_func_t(struct sk_buff *skb,
2196                                 struct team *team, u32 portid);
2197 
2198 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2199 {
2200         return genlmsg_unicast(dev_net(team->dev), skb, portid);
2201 }
2202 
2203 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2204                                        struct team_option_inst *opt_inst)
2205 {
2206         struct nlattr *option_item;
2207         struct team_option *option = opt_inst->option;
2208         struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2209         struct team_gsetter_ctx ctx;
2210         int err;
2211 
2212         ctx.info = opt_inst_info;
2213         err = team_option_get(team, opt_inst, &ctx);
2214         if (err)
2215                 return err;
2216 
2217         option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
2218         if (!option_item)
2219                 return -EMSGSIZE;
2220 
2221         if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2222                 goto nest_cancel;
2223         if (opt_inst_info->port &&
2224             nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2225                         opt_inst_info->port->dev->ifindex))
2226                 goto nest_cancel;
2227         if (opt_inst->option->array_size &&
2228             nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2229                         opt_inst_info->array_index))
2230                 goto nest_cancel;
2231 
2232         switch (option->type) {
2233         case TEAM_OPTION_TYPE_U32:
2234                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2235                         goto nest_cancel;
2236                 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2237                         goto nest_cancel;
2238                 break;
2239         case TEAM_OPTION_TYPE_STRING:
2240                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2241                         goto nest_cancel;
2242                 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2243                                    ctx.data.str_val))
2244                         goto nest_cancel;
2245                 break;
2246         case TEAM_OPTION_TYPE_BINARY:
2247                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2248                         goto nest_cancel;
2249                 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2250                             ctx.data.bin_val.ptr))
2251                         goto nest_cancel;
2252                 break;
2253         case TEAM_OPTION_TYPE_BOOL:
2254                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2255                         goto nest_cancel;
2256                 if (ctx.data.bool_val &&
2257                     nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2258                         goto nest_cancel;
2259                 break;
2260         case TEAM_OPTION_TYPE_S32:
2261                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2262                         goto nest_cancel;
2263                 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2264                         goto nest_cancel;
2265                 break;
2266         default:
2267                 BUG();
2268         }
2269         if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2270                 goto nest_cancel;
2271         if (opt_inst->changed) {
2272                 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2273                         goto nest_cancel;
2274                 opt_inst->changed = false;
2275         }
2276         nla_nest_end(skb, option_item);
2277         return 0;
2278 
2279 nest_cancel:
2280         nla_nest_cancel(skb, option_item);
2281         return -EMSGSIZE;
2282 }
2283 
2284 static int __send_and_alloc_skb(struct sk_buff **pskb,
2285                                 struct team *team, u32 portid,
2286                                 team_nl_send_func_t *send_func)
2287 {
2288         int err;
2289 
2290         if (*pskb) {
2291                 err = send_func(*pskb, team, portid);
2292                 if (err)
2293                         return err;
2294         }
2295         *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2296         if (!*pskb)
2297                 return -ENOMEM;
2298         return 0;
2299 }
2300 
2301 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2302                                     int flags, team_nl_send_func_t *send_func,
2303                                     struct list_head *sel_opt_inst_list)
2304 {
2305         struct nlattr *option_list;
2306         struct nlmsghdr *nlh;
2307         void *hdr;
2308         struct team_option_inst *opt_inst;
2309         int err;
2310         struct sk_buff *skb = NULL;
2311         bool incomplete;
2312         int i;
2313 
2314         opt_inst = list_first_entry(sel_opt_inst_list,
2315                                     struct team_option_inst, tmp_list);
2316 
2317 start_again:
2318         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2319         if (err)
2320                 return err;
2321 
2322         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2323                           TEAM_CMD_OPTIONS_GET);
2324         if (!hdr)
2325                 return -EMSGSIZE;
2326 
2327         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2328                 goto nla_put_failure;
2329         option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2330         if (!option_list)
2331                 goto nla_put_failure;
2332 
2333         i = 0;
2334         incomplete = false;
2335         list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2336                 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2337                 if (err) {
2338                         if (err == -EMSGSIZE) {
2339                                 if (!i)
2340                                         goto errout;
2341                                 incomplete = true;
2342                                 break;
2343                         }
2344                         goto errout;
2345                 }
2346                 i++;
2347         }
2348 
2349         nla_nest_end(skb, option_list);
2350         genlmsg_end(skb, hdr);
2351         if (incomplete)
2352                 goto start_again;
2353 
2354 send_done:
2355         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2356         if (!nlh) {
2357                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2358                 if (err)
2359                         goto errout;
2360                 goto send_done;
2361         }
2362 
2363         return send_func(skb, team, portid);
2364 
2365 nla_put_failure:
2366         err = -EMSGSIZE;
2367 errout:
2368         genlmsg_cancel(skb, hdr);
2369         nlmsg_free(skb);
2370         return err;
2371 }
2372 
2373 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2374 {
2375         struct team *team;
2376         struct team_option_inst *opt_inst;
2377         int err;
2378         LIST_HEAD(sel_opt_inst_list);
2379 
2380         team = team_nl_team_get(info);
2381         if (!team)
2382                 return -EINVAL;
2383 
2384         list_for_each_entry(opt_inst, &team->option_inst_list, list)
2385                 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2386         err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2387                                        NLM_F_ACK, team_nl_send_unicast,
2388                                        &sel_opt_inst_list);
2389 
2390         team_nl_team_put(team);
2391 
2392         return err;
2393 }
2394 
2395 static int team_nl_send_event_options_get(struct team *team,
2396                                           struct list_head *sel_opt_inst_list);
2397 
2398 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2399 {
2400         struct team *team;
2401         int err = 0;
2402         int i;
2403         struct nlattr *nl_option;
2404         LIST_HEAD(opt_inst_list);
2405 
2406         team = team_nl_team_get(info);
2407         if (!team)
2408                 return -EINVAL;
2409 
2410         err = -EINVAL;
2411         if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2412                 err = -EINVAL;
2413                 goto team_put;
2414         }
2415 
2416         nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2417                 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2418                 struct nlattr *attr;
2419                 struct nlattr *attr_data;
2420                 enum team_option_type opt_type;
2421                 int opt_port_ifindex = 0; /* != 0 for per-port options */
2422                 u32 opt_array_index = 0;
2423                 bool opt_is_array = false;
2424                 struct team_option_inst *opt_inst;
2425                 char *opt_name;
2426                 bool opt_found = false;
2427 
2428                 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2429                         err = -EINVAL;
2430                         goto team_put;
2431                 }
2432                 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2433                                        nl_option, team_nl_option_policy);
2434                 if (err)
2435                         goto team_put;
2436                 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2437                     !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2438                         err = -EINVAL;
2439                         goto team_put;
2440                 }
2441                 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2442                 case NLA_U32:
2443                         opt_type = TEAM_OPTION_TYPE_U32;
2444                         break;
2445                 case NLA_STRING:
2446                         opt_type = TEAM_OPTION_TYPE_STRING;
2447                         break;
2448                 case NLA_BINARY:
2449                         opt_type = TEAM_OPTION_TYPE_BINARY;
2450                         break;
2451                 case NLA_FLAG:
2452                         opt_type = TEAM_OPTION_TYPE_BOOL;
2453                         break;
2454                 case NLA_S32:
2455                         opt_type = TEAM_OPTION_TYPE_S32;
2456                         break;
2457                 default:
2458                         goto team_put;
2459                 }
2460 
2461                 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2462                 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2463                         err = -EINVAL;
2464                         goto team_put;
2465                 }
2466 
2467                 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2468                 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2469                 if (attr)
2470                         opt_port_ifindex = nla_get_u32(attr);
2471 
2472                 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2473                 if (attr) {
2474                         opt_is_array = true;
2475                         opt_array_index = nla_get_u32(attr);
2476                 }
2477 
2478                 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2479                         struct team_option *option = opt_inst->option;
2480                         struct team_gsetter_ctx ctx;
2481                         struct team_option_inst_info *opt_inst_info;
2482                         int tmp_ifindex;
2483 
2484                         opt_inst_info = &opt_inst->info;
2485                         tmp_ifindex = opt_inst_info->port ?
2486                                       opt_inst_info->port->dev->ifindex : 0;
2487                         if (option->type != opt_type ||
2488                             strcmp(option->name, opt_name) ||
2489                             tmp_ifindex != opt_port_ifindex ||
2490                             (option->array_size && !opt_is_array) ||
2491                             opt_inst_info->array_index != opt_array_index)
2492                                 continue;
2493                         opt_found = true;
2494                         ctx.info = opt_inst_info;
2495                         switch (opt_type) {
2496                         case TEAM_OPTION_TYPE_U32:
2497                                 ctx.data.u32_val = nla_get_u32(attr_data);
2498                                 break;
2499                         case TEAM_OPTION_TYPE_STRING:
2500                                 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2501                                         err = -EINVAL;
2502                                         goto team_put;
2503                                 }
2504                                 ctx.data.str_val = nla_data(attr_data);
2505                                 break;
2506                         case TEAM_OPTION_TYPE_BINARY:
2507                                 ctx.data.bin_val.len = nla_len(attr_data);
2508                                 ctx.data.bin_val.ptr = nla_data(attr_data);
2509                                 break;
2510                         case TEAM_OPTION_TYPE_BOOL:
2511                                 ctx.data.bool_val = attr_data ? true : false;
2512                                 break;
2513                         case TEAM_OPTION_TYPE_S32:
2514                                 ctx.data.s32_val = nla_get_s32(attr_data);
2515                                 break;
2516                         default:
2517                                 BUG();
2518                         }
2519                         err = team_option_set(team, opt_inst, &ctx);
2520                         if (err)
2521                                 goto team_put;
2522                         opt_inst->changed = true;
2523                         list_add(&opt_inst->tmp_list, &opt_inst_list);
2524                 }
2525                 if (!opt_found) {
2526                         err = -ENOENT;
2527                         goto team_put;
2528                 }
2529         }
2530 
2531         err = team_nl_send_event_options_get(team, &opt_inst_list);
2532 
2533 team_put:
2534         team_nl_team_put(team);
2535 
2536         return err;
2537 }
2538 
2539 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2540                                      struct team_port *port)
2541 {
2542         struct nlattr *port_item;
2543 
2544         port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2545         if (!port_item)
2546                 goto nest_cancel;
2547         if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2548                 goto nest_cancel;
2549         if (port->changed) {
2550                 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2551                         goto nest_cancel;
2552                 port->changed = false;
2553         }
2554         if ((port->removed &&
2555              nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2556             (port->state.linkup &&
2557              nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2558             nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2559             nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2560                 goto nest_cancel;
2561         nla_nest_end(skb, port_item);
2562         return 0;
2563 
2564 nest_cancel:
2565         nla_nest_cancel(skb, port_item);
2566         return -EMSGSIZE;
2567 }
2568 
2569 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2570                                       int flags, team_nl_send_func_t *send_func,
2571                                       struct team_port *one_port)
2572 {
2573         struct nlattr *port_list;
2574         struct nlmsghdr *nlh;
2575         void *hdr;
2576         struct team_port *port;
2577         int err;
2578         struct sk_buff *skb = NULL;
2579         bool incomplete;
2580         int i;
2581 
2582         port = list_first_entry_or_null(&team->port_list,
2583                                         struct team_port, list);
2584 
2585 start_again:
2586         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2587         if (err)
2588                 return err;
2589 
2590         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2591                           TEAM_CMD_PORT_LIST_GET);
2592         if (!hdr)
2593                 return -EMSGSIZE;
2594 
2595         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2596                 goto nla_put_failure;
2597         port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2598         if (!port_list)
2599                 goto nla_put_failure;
2600 
2601         i = 0;
2602         incomplete = false;
2603 
2604         /* If one port is selected, called wants to send port list containing
2605          * only this port. Otherwise go through all listed ports and send all
2606          */
2607         if (one_port) {
2608                 err = team_nl_fill_one_port_get(skb, one_port);
2609                 if (err)
2610                         goto errout;
2611         } else if (port) {
2612                 list_for_each_entry_from(port, &team->port_list, list) {
2613                         err = team_nl_fill_one_port_get(skb, port);
2614                         if (err) {
2615                                 if (err == -EMSGSIZE) {
2616                                         if (!i)
2617                                                 goto errout;
2618                                         incomplete = true;
2619                                         break;
2620                                 }
2621                                 goto errout;
2622                         }
2623                         i++;
2624                 }
2625         }
2626 
2627         nla_nest_end(skb, port_list);
2628         genlmsg_end(skb, hdr);
2629         if (incomplete)
2630                 goto start_again;
2631 
2632 send_done:
2633         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2634         if (!nlh) {
2635                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2636                 if (err)
2637                         goto errout;
2638                 goto send_done;
2639         }
2640 
2641         return send_func(skb, team, portid);
2642 
2643 nla_put_failure:
2644         err = -EMSGSIZE;
2645 errout:
2646         genlmsg_cancel(skb, hdr);
2647         nlmsg_free(skb);
2648         return err;
2649 }
2650 
2651 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2652                                      struct genl_info *info)
2653 {
2654         struct team *team;
2655         int err;
2656 
2657         team = team_nl_team_get(info);
2658         if (!team)
2659                 return -EINVAL;
2660 
2661         err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2662                                          NLM_F_ACK, team_nl_send_unicast, NULL);
2663 
2664         team_nl_team_put(team);
2665 
2666         return err;
2667 }
2668 
2669 static const struct genl_ops team_nl_ops[] = {
2670         {
2671                 .cmd = TEAM_CMD_NOOP,
2672                 .doit = team_nl_cmd_noop,
2673                 .policy = team_nl_policy,
2674         },
2675         {
2676                 .cmd = TEAM_CMD_OPTIONS_SET,
2677                 .doit = team_nl_cmd_options_set,
2678                 .policy = team_nl_policy,
2679                 .flags = GENL_ADMIN_PERM,
2680         },
2681         {
2682                 .cmd = TEAM_CMD_OPTIONS_GET,
2683                 .doit = team_nl_cmd_options_get,
2684                 .policy = team_nl_policy,
2685                 .flags = GENL_ADMIN_PERM,
2686         },
2687         {
2688                 .cmd = TEAM_CMD_PORT_LIST_GET,
2689                 .doit = team_nl_cmd_port_list_get,
2690                 .policy = team_nl_policy,
2691                 .flags = GENL_ADMIN_PERM,
2692         },
2693 };
2694 
2695 static const struct genl_multicast_group team_nl_mcgrps[] = {
2696         { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2697 };
2698 
2699 static int team_nl_send_multicast(struct sk_buff *skb,
2700                                   struct team *team, u32 portid)
2701 {
2702         return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2703                                        skb, 0, 0, GFP_KERNEL);
2704 }
2705 
2706 static int team_nl_send_event_options_get(struct team *team,
2707                                           struct list_head *sel_opt_inst_list)
2708 {
2709         return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2710                                         sel_opt_inst_list);
2711 }
2712 
2713 static int team_nl_send_event_port_get(struct team *team,
2714                                        struct team_port *port)
2715 {
2716         return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2717                                           port);
2718 }
2719 
2720 static int team_nl_init(void)
2721 {
2722         return genl_register_family_with_ops_groups(&team_nl_family, team_nl_ops,
2723                                                     team_nl_mcgrps);
2724 }
2725 
2726 static void team_nl_fini(void)
2727 {
2728         genl_unregister_family(&team_nl_family);
2729 }
2730 
2731 
2732 /******************
2733  * Change checkers
2734  ******************/
2735 
2736 static void __team_options_change_check(struct team *team)
2737 {
2738         int err;
2739         struct team_option_inst *opt_inst;
2740         LIST_HEAD(sel_opt_inst_list);
2741 
2742         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2743                 if (opt_inst->changed)
2744                         list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2745         }
2746         err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2747         if (err && err != -ESRCH)
2748                 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2749                             err);
2750 }
2751 
2752 /* rtnl lock is held */
2753 
2754 static void __team_port_change_send(struct team_port *port, bool linkup)
2755 {
2756         int err;
2757 
2758         port->changed = true;
2759         port->state.linkup = linkup;
2760         team_refresh_port_linkup(port);
2761         if (linkup) {
2762                 struct ethtool_cmd ecmd;
2763 
2764                 err = __ethtool_get_settings(port->dev, &ecmd);
2765                 if (!err) {
2766                         port->state.speed = ethtool_cmd_speed(&ecmd);
2767                         port->state.duplex = ecmd.duplex;
2768                         goto send_event;
2769                 }
2770         }
2771         port->state.speed = 0;
2772         port->state.duplex = 0;
2773 
2774 send_event:
2775         err = team_nl_send_event_port_get(port->team, port);
2776         if (err && err != -ESRCH)
2777                 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2778                             port->dev->name, err);
2779 
2780 }
2781 
2782 static void __team_carrier_check(struct team *team)
2783 {
2784         struct team_port *port;
2785         bool team_linkup;
2786 
2787         if (team->user_carrier_enabled)
2788                 return;
2789 
2790         team_linkup = false;
2791         list_for_each_entry(port, &team->port_list, list) {
2792                 if (port->linkup) {
2793                         team_linkup = true;
2794                         break;
2795                 }
2796         }
2797 
2798         if (team_linkup)
2799                 netif_carrier_on(team->dev);
2800         else
2801                 netif_carrier_off(team->dev);
2802 }
2803 
2804 static void __team_port_change_check(struct team_port *port, bool linkup)
2805 {
2806         if (port->state.linkup != linkup)
2807                 __team_port_change_send(port, linkup);
2808         __team_carrier_check(port->team);
2809 }
2810 
2811 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2812 {
2813         __team_port_change_send(port, linkup);
2814         __team_carrier_check(port->team);
2815 }
2816 
2817 static void __team_port_change_port_removed(struct team_port *port)
2818 {
2819         port->removed = true;
2820         __team_port_change_send(port, false);
2821         __team_carrier_check(port->team);
2822 }
2823 
2824 static void team_port_change_check(struct team_port *port, bool linkup)
2825 {
2826         struct team *team = port->team;
2827 
2828         mutex_lock(&team->lock);
2829         __team_port_change_check(port, linkup);
2830         mutex_unlock(&team->lock);
2831 }
2832 
2833 
2834 /************************************
2835  * Net device notifier event handler
2836  ************************************/
2837 
2838 static int team_device_event(struct notifier_block *unused,
2839                              unsigned long event, void *ptr)
2840 {
2841         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2842         struct team_port *port;
2843 
2844         port = team_port_get_rtnl(dev);
2845         if (!port)
2846                 return NOTIFY_DONE;
2847 
2848         switch (event) {
2849         case NETDEV_UP:
2850                 if (netif_carrier_ok(dev))
2851                         team_port_change_check(port, true);
2852                 break;
2853         case NETDEV_DOWN:
2854                 team_port_change_check(port, false);
2855                 break;
2856         case NETDEV_CHANGE:
2857                 if (netif_running(port->dev))
2858                         team_port_change_check(port,
2859                                                !!netif_carrier_ok(port->dev));
2860                 break;
2861         case NETDEV_UNREGISTER:
2862                 team_del_slave(port->team->dev, dev);
2863                 break;
2864         case NETDEV_FEAT_CHANGE:
2865                 team_compute_features(port->team);
2866                 break;
2867         case NETDEV_PRECHANGEMTU:
2868                 /* Forbid to change mtu of underlaying device */
2869                 if (!port->team->port_mtu_change_allowed)
2870                         return NOTIFY_BAD;
2871                 break;
2872         case NETDEV_PRE_TYPE_CHANGE:
2873                 /* Forbid to change type of underlaying device */
2874                 return NOTIFY_BAD;
2875         case NETDEV_RESEND_IGMP:
2876                 /* Propagate to master device */
2877                 call_netdevice_notifiers(event, port->team->dev);
2878                 break;
2879         }
2880         return NOTIFY_DONE;
2881 }
2882 
2883 static struct notifier_block team_notifier_block __read_mostly = {
2884         .notifier_call = team_device_event,
2885 };
2886 
2887 
2888 /***********************
2889  * Module init and exit
2890  ***********************/
2891 
2892 static int __init team_module_init(void)
2893 {
2894         int err;
2895 
2896         register_netdevice_notifier(&team_notifier_block);
2897 
2898         err = rtnl_link_register(&team_link_ops);
2899         if (err)
2900                 goto err_rtnl_reg;
2901 
2902         err = team_nl_init();
2903         if (err)
2904                 goto err_nl_init;
2905 
2906         return 0;
2907 
2908 err_nl_init:
2909         rtnl_link_unregister(&team_link_ops);
2910 
2911 err_rtnl_reg:
2912         unregister_netdevice_notifier(&team_notifier_block);
2913 
2914         return err;
2915 }
2916 
2917 static void __exit team_module_exit(void)
2918 {
2919         team_nl_fini();
2920         rtnl_link_unregister(&team_link_ops);
2921         unregister_netdevice_notifier(&team_notifier_block);
2922 }
2923 
2924 module_init(team_module_init);
2925 module_exit(team_module_exit);
2926 
2927 MODULE_LICENSE("GPL v2");
2928 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
2929 MODULE_DESCRIPTION("Ethernet team device driver");
2930 MODULE_ALIAS_RTNL_LINK(DRV_NAME);
2931 

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