Version:  2.6.34 2.6.35 2.6.36 2.6.37 2.6.38 2.6.39 3.0 3.1 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

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_set(&team->notify_peers.count_pending, team->notify_peers.count);
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_set(&team->mcast_rejoin.count_pending, team->mcast_rejoin.count);
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;
972         unsigned short max_hard_header_len = ETH_HLEN;
973         unsigned int flags, dst_release_flag = IFF_XMIT_DST_RELEASE;
974 
975         list_for_each_entry(port, &team->port_list, list) {
976                 vlan_features = netdev_increment_features(vlan_features,
977                                         port->dev->vlan_features,
978                                         TEAM_VLAN_FEATURES);
979 
980                 dst_release_flag &= port->dev->priv_flags;
981                 if (port->dev->hard_header_len > max_hard_header_len)
982                         max_hard_header_len = port->dev->hard_header_len;
983         }
984 
985         team->dev->vlan_features = vlan_features;
986         team->dev->hard_header_len = max_hard_header_len;
987 
988         flags = team->dev->priv_flags & ~IFF_XMIT_DST_RELEASE;
989         team->dev->priv_flags = flags | dst_release_flag;
990 
991         netdev_change_features(team->dev);
992 }
993 
994 static void team_compute_features(struct team *team)
995 {
996         mutex_lock(&team->lock);
997         __team_compute_features(team);
998         mutex_unlock(&team->lock);
999 }
1000 
1001 static int team_port_enter(struct team *team, struct team_port *port)
1002 {
1003         int err = 0;
1004 
1005         dev_hold(team->dev);
1006         port->dev->priv_flags |= IFF_TEAM_PORT;
1007         if (team->ops.port_enter) {
1008                 err = team->ops.port_enter(team, port);
1009                 if (err) {
1010                         netdev_err(team->dev, "Device %s failed to enter team mode\n",
1011                                    port->dev->name);
1012                         goto err_port_enter;
1013                 }
1014         }
1015 
1016         return 0;
1017 
1018 err_port_enter:
1019         port->dev->priv_flags &= ~IFF_TEAM_PORT;
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         port->dev->priv_flags &= ~IFF_TEAM_PORT;
1030         dev_put(team->dev);
1031 }
1032 
1033 #ifdef CONFIG_NET_POLL_CONTROLLER
1034 static int team_port_enable_netpoll(struct team *team, struct team_port *port,
1035                                     gfp_t gfp)
1036 {
1037         struct netpoll *np;
1038         int err;
1039 
1040         if (!team->dev->npinfo)
1041                 return 0;
1042 
1043         np = kzalloc(sizeof(*np), gfp);
1044         if (!np)
1045                 return -ENOMEM;
1046 
1047         err = __netpoll_setup(np, port->dev, gfp);
1048         if (err) {
1049                 kfree(np);
1050                 return err;
1051         }
1052         port->np = np;
1053         return err;
1054 }
1055 
1056 static void team_port_disable_netpoll(struct team_port *port)
1057 {
1058         struct netpoll *np = port->np;
1059 
1060         if (!np)
1061                 return;
1062         port->np = NULL;
1063 
1064         /* Wait for transmitting packets to finish before freeing. */
1065         synchronize_rcu_bh();
1066         __netpoll_cleanup(np);
1067         kfree(np);
1068 }
1069 #else
1070 static int team_port_enable_netpoll(struct team *team, struct team_port *port,
1071                                     gfp_t gfp)
1072 {
1073         return 0;
1074 }
1075 static void team_port_disable_netpoll(struct team_port *port)
1076 {
1077 }
1078 #endif
1079 
1080 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1081 static int team_dev_type_check_change(struct net_device *dev,
1082                                       struct net_device *port_dev);
1083 
1084 static int team_port_add(struct team *team, struct net_device *port_dev)
1085 {
1086         struct net_device *dev = team->dev;
1087         struct team_port *port;
1088         char *portname = port_dev->name;
1089         int err;
1090 
1091         if (port_dev->flags & IFF_LOOPBACK) {
1092                 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1093                            portname);
1094                 return -EINVAL;
1095         }
1096 
1097         if (team_port_exists(port_dev)) {
1098                 netdev_err(dev, "Device %s is already a port "
1099                                 "of a team device\n", portname);
1100                 return -EBUSY;
1101         }
1102 
1103         if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1104             vlan_uses_dev(dev)) {
1105                 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1106                            portname);
1107                 return -EPERM;
1108         }
1109 
1110         err = team_dev_type_check_change(dev, port_dev);
1111         if (err)
1112                 return err;
1113 
1114         if (port_dev->flags & IFF_UP) {
1115                 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1116                            portname);
1117                 return -EBUSY;
1118         }
1119 
1120         port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1121                        GFP_KERNEL);
1122         if (!port)
1123                 return -ENOMEM;
1124 
1125         port->dev = port_dev;
1126         port->team = team;
1127         INIT_LIST_HEAD(&port->qom_list);
1128 
1129         port->orig.mtu = port_dev->mtu;
1130         err = dev_set_mtu(port_dev, dev->mtu);
1131         if (err) {
1132                 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1133                 goto err_set_mtu;
1134         }
1135 
1136         memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1137 
1138         err = team_port_enter(team, port);
1139         if (err) {
1140                 netdev_err(dev, "Device %s failed to enter team mode\n",
1141                            portname);
1142                 goto err_port_enter;
1143         }
1144 
1145         err = dev_open(port_dev);
1146         if (err) {
1147                 netdev_dbg(dev, "Device %s opening failed\n",
1148                            portname);
1149                 goto err_dev_open;
1150         }
1151 
1152         err = vlan_vids_add_by_dev(port_dev, dev);
1153         if (err) {
1154                 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1155                                 portname);
1156                 goto err_vids_add;
1157         }
1158 
1159         err = team_port_enable_netpoll(team, port, GFP_KERNEL);
1160         if (err) {
1161                 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1162                            portname);
1163                 goto err_enable_netpoll;
1164         }
1165 
1166         err = netdev_master_upper_dev_link(port_dev, dev);
1167         if (err) {
1168                 netdev_err(dev, "Device %s failed to set upper link\n",
1169                            portname);
1170                 goto err_set_upper_link;
1171         }
1172 
1173         err = netdev_rx_handler_register(port_dev, team_handle_frame,
1174                                          port);
1175         if (err) {
1176                 netdev_err(dev, "Device %s failed to register rx_handler\n",
1177                            portname);
1178                 goto err_handler_register;
1179         }
1180 
1181         err = __team_option_inst_add_port(team, port);
1182         if (err) {
1183                 netdev_err(dev, "Device %s failed to add per-port options\n",
1184                            portname);
1185                 goto err_option_port_add;
1186         }
1187 
1188         port->index = -1;
1189         list_add_tail_rcu(&port->list, &team->port_list);
1190         team_port_enable(team, port);
1191         __team_compute_features(team);
1192         __team_port_change_port_added(port, !!netif_carrier_ok(port_dev));
1193         __team_options_change_check(team);
1194 
1195         netdev_info(dev, "Port device %s added\n", portname);
1196 
1197         return 0;
1198 
1199 err_option_port_add:
1200         netdev_rx_handler_unregister(port_dev);
1201 
1202 err_handler_register:
1203         netdev_upper_dev_unlink(port_dev, dev);
1204 
1205 err_set_upper_link:
1206         team_port_disable_netpoll(port);
1207 
1208 err_enable_netpoll:
1209         vlan_vids_del_by_dev(port_dev, dev);
1210 
1211 err_vids_add:
1212         dev_close(port_dev);
1213 
1214 err_dev_open:
1215         team_port_leave(team, port);
1216         team_port_set_orig_dev_addr(port);
1217 
1218 err_port_enter:
1219         dev_set_mtu(port_dev, port->orig.mtu);
1220 
1221 err_set_mtu:
1222         kfree(port);
1223 
1224         return err;
1225 }
1226 
1227 static void __team_port_change_port_removed(struct team_port *port);
1228 
1229 static int team_port_del(struct team *team, struct net_device *port_dev)
1230 {
1231         struct net_device *dev = team->dev;
1232         struct team_port *port;
1233         char *portname = port_dev->name;
1234 
1235         port = team_port_get_rtnl(port_dev);
1236         if (!port || !team_port_find(team, port)) {
1237                 netdev_err(dev, "Device %s does not act as a port of this team\n",
1238                            portname);
1239                 return -ENOENT;
1240         }
1241 
1242         team_port_disable(team, port);
1243         list_del_rcu(&port->list);
1244         netdev_rx_handler_unregister(port_dev);
1245         netdev_upper_dev_unlink(port_dev, dev);
1246         team_port_disable_netpoll(port);
1247         vlan_vids_del_by_dev(port_dev, dev);
1248         dev_uc_unsync(port_dev, dev);
1249         dev_mc_unsync(port_dev, dev);
1250         dev_close(port_dev);
1251         team_port_leave(team, port);
1252 
1253         __team_option_inst_mark_removed_port(team, port);
1254         __team_options_change_check(team);
1255         __team_option_inst_del_port(team, port);
1256         __team_port_change_port_removed(port);
1257 
1258         team_port_set_orig_dev_addr(port);
1259         dev_set_mtu(port_dev, port->orig.mtu);
1260         kfree_rcu(port, rcu);
1261         netdev_info(dev, "Port device %s removed\n", portname);
1262         __team_compute_features(team);
1263 
1264         return 0;
1265 }
1266 
1267 
1268 /*****************
1269  * Net device ops
1270  *****************/
1271 
1272 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1273 {
1274         ctx->data.str_val = team->mode->kind;
1275         return 0;
1276 }
1277 
1278 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1279 {
1280         return team_change_mode(team, ctx->data.str_val);
1281 }
1282 
1283 static int team_notify_peers_count_get(struct team *team,
1284                                        struct team_gsetter_ctx *ctx)
1285 {
1286         ctx->data.u32_val = team->notify_peers.count;
1287         return 0;
1288 }
1289 
1290 static int team_notify_peers_count_set(struct team *team,
1291                                        struct team_gsetter_ctx *ctx)
1292 {
1293         team->notify_peers.count = ctx->data.u32_val;
1294         return 0;
1295 }
1296 
1297 static int team_notify_peers_interval_get(struct team *team,
1298                                           struct team_gsetter_ctx *ctx)
1299 {
1300         ctx->data.u32_val = team->notify_peers.interval;
1301         return 0;
1302 }
1303 
1304 static int team_notify_peers_interval_set(struct team *team,
1305                                           struct team_gsetter_ctx *ctx)
1306 {
1307         team->notify_peers.interval = ctx->data.u32_val;
1308         return 0;
1309 }
1310 
1311 static int team_mcast_rejoin_count_get(struct team *team,
1312                                        struct team_gsetter_ctx *ctx)
1313 {
1314         ctx->data.u32_val = team->mcast_rejoin.count;
1315         return 0;
1316 }
1317 
1318 static int team_mcast_rejoin_count_set(struct team *team,
1319                                        struct team_gsetter_ctx *ctx)
1320 {
1321         team->mcast_rejoin.count = ctx->data.u32_val;
1322         return 0;
1323 }
1324 
1325 static int team_mcast_rejoin_interval_get(struct team *team,
1326                                           struct team_gsetter_ctx *ctx)
1327 {
1328         ctx->data.u32_val = team->mcast_rejoin.interval;
1329         return 0;
1330 }
1331 
1332 static int team_mcast_rejoin_interval_set(struct team *team,
1333                                           struct team_gsetter_ctx *ctx)
1334 {
1335         team->mcast_rejoin.interval = ctx->data.u32_val;
1336         return 0;
1337 }
1338 
1339 static int team_port_en_option_get(struct team *team,
1340                                    struct team_gsetter_ctx *ctx)
1341 {
1342         struct team_port *port = ctx->info->port;
1343 
1344         ctx->data.bool_val = team_port_enabled(port);
1345         return 0;
1346 }
1347 
1348 static int team_port_en_option_set(struct team *team,
1349                                    struct team_gsetter_ctx *ctx)
1350 {
1351         struct team_port *port = ctx->info->port;
1352 
1353         if (ctx->data.bool_val)
1354                 team_port_enable(team, port);
1355         else
1356                 team_port_disable(team, port);
1357         return 0;
1358 }
1359 
1360 static int team_user_linkup_option_get(struct team *team,
1361                                        struct team_gsetter_ctx *ctx)
1362 {
1363         struct team_port *port = ctx->info->port;
1364 
1365         ctx->data.bool_val = port->user.linkup;
1366         return 0;
1367 }
1368 
1369 static void __team_carrier_check(struct team *team);
1370 
1371 static int team_user_linkup_option_set(struct team *team,
1372                                        struct team_gsetter_ctx *ctx)
1373 {
1374         struct team_port *port = ctx->info->port;
1375 
1376         port->user.linkup = ctx->data.bool_val;
1377         team_refresh_port_linkup(port);
1378         __team_carrier_check(port->team);
1379         return 0;
1380 }
1381 
1382 static int team_user_linkup_en_option_get(struct team *team,
1383                                           struct team_gsetter_ctx *ctx)
1384 {
1385         struct team_port *port = ctx->info->port;
1386 
1387         ctx->data.bool_val = port->user.linkup_enabled;
1388         return 0;
1389 }
1390 
1391 static int team_user_linkup_en_option_set(struct team *team,
1392                                           struct team_gsetter_ctx *ctx)
1393 {
1394         struct team_port *port = ctx->info->port;
1395 
1396         port->user.linkup_enabled = ctx->data.bool_val;
1397         team_refresh_port_linkup(port);
1398         __team_carrier_check(port->team);
1399         return 0;
1400 }
1401 
1402 static int team_priority_option_get(struct team *team,
1403                                     struct team_gsetter_ctx *ctx)
1404 {
1405         struct team_port *port = ctx->info->port;
1406 
1407         ctx->data.s32_val = port->priority;
1408         return 0;
1409 }
1410 
1411 static int team_priority_option_set(struct team *team,
1412                                     struct team_gsetter_ctx *ctx)
1413 {
1414         struct team_port *port = ctx->info->port;
1415         s32 priority = ctx->data.s32_val;
1416 
1417         if (port->priority == priority)
1418                 return 0;
1419         port->priority = priority;
1420         team_queue_override_port_prio_changed(team, port);
1421         return 0;
1422 }
1423 
1424 static int team_queue_id_option_get(struct team *team,
1425                                     struct team_gsetter_ctx *ctx)
1426 {
1427         struct team_port *port = ctx->info->port;
1428 
1429         ctx->data.u32_val = port->queue_id;
1430         return 0;
1431 }
1432 
1433 static int team_queue_id_option_set(struct team *team,
1434                                     struct team_gsetter_ctx *ctx)
1435 {
1436         struct team_port *port = ctx->info->port;
1437         u16 new_queue_id = ctx->data.u32_val;
1438 
1439         if (port->queue_id == new_queue_id)
1440                 return 0;
1441         if (new_queue_id >= team->dev->real_num_tx_queues)
1442                 return -EINVAL;
1443         team_queue_override_port_change_queue_id(team, port, new_queue_id);
1444         return 0;
1445 }
1446 
1447 static const struct team_option team_options[] = {
1448         {
1449                 .name = "mode",
1450                 .type = TEAM_OPTION_TYPE_STRING,
1451                 .getter = team_mode_option_get,
1452                 .setter = team_mode_option_set,
1453         },
1454         {
1455                 .name = "notify_peers_count",
1456                 .type = TEAM_OPTION_TYPE_U32,
1457                 .getter = team_notify_peers_count_get,
1458                 .setter = team_notify_peers_count_set,
1459         },
1460         {
1461                 .name = "notify_peers_interval",
1462                 .type = TEAM_OPTION_TYPE_U32,
1463                 .getter = team_notify_peers_interval_get,
1464                 .setter = team_notify_peers_interval_set,
1465         },
1466         {
1467                 .name = "mcast_rejoin_count",
1468                 .type = TEAM_OPTION_TYPE_U32,
1469                 .getter = team_mcast_rejoin_count_get,
1470                 .setter = team_mcast_rejoin_count_set,
1471         },
1472         {
1473                 .name = "mcast_rejoin_interval",
1474                 .type = TEAM_OPTION_TYPE_U32,
1475                 .getter = team_mcast_rejoin_interval_get,
1476                 .setter = team_mcast_rejoin_interval_set,
1477         },
1478         {
1479                 .name = "enabled",
1480                 .type = TEAM_OPTION_TYPE_BOOL,
1481                 .per_port = true,
1482                 .getter = team_port_en_option_get,
1483                 .setter = team_port_en_option_set,
1484         },
1485         {
1486                 .name = "user_linkup",
1487                 .type = TEAM_OPTION_TYPE_BOOL,
1488                 .per_port = true,
1489                 .getter = team_user_linkup_option_get,
1490                 .setter = team_user_linkup_option_set,
1491         },
1492         {
1493                 .name = "user_linkup_enabled",
1494                 .type = TEAM_OPTION_TYPE_BOOL,
1495                 .per_port = true,
1496                 .getter = team_user_linkup_en_option_get,
1497                 .setter = team_user_linkup_en_option_set,
1498         },
1499         {
1500                 .name = "priority",
1501                 .type = TEAM_OPTION_TYPE_S32,
1502                 .per_port = true,
1503                 .getter = team_priority_option_get,
1504                 .setter = team_priority_option_set,
1505         },
1506         {
1507                 .name = "queue_id",
1508                 .type = TEAM_OPTION_TYPE_U32,
1509                 .per_port = true,
1510                 .getter = team_queue_id_option_get,
1511                 .setter = team_queue_id_option_set,
1512         },
1513 };
1514 
1515 static struct lock_class_key team_netdev_xmit_lock_key;
1516 static struct lock_class_key team_netdev_addr_lock_key;
1517 static struct lock_class_key team_tx_busylock_key;
1518 
1519 static void team_set_lockdep_class_one(struct net_device *dev,
1520                                        struct netdev_queue *txq,
1521                                        void *unused)
1522 {
1523         lockdep_set_class(&txq->_xmit_lock, &team_netdev_xmit_lock_key);
1524 }
1525 
1526 static void team_set_lockdep_class(struct net_device *dev)
1527 {
1528         lockdep_set_class(&dev->addr_list_lock, &team_netdev_addr_lock_key);
1529         netdev_for_each_tx_queue(dev, team_set_lockdep_class_one, NULL);
1530         dev->qdisc_tx_busylock = &team_tx_busylock_key;
1531 }
1532 
1533 static int team_init(struct net_device *dev)
1534 {
1535         struct team *team = netdev_priv(dev);
1536         int i;
1537         int err;
1538 
1539         team->dev = dev;
1540         mutex_init(&team->lock);
1541         team_set_no_mode(team);
1542 
1543         team->pcpu_stats = alloc_percpu(struct team_pcpu_stats);
1544         if (!team->pcpu_stats)
1545                 return -ENOMEM;
1546 
1547         for_each_possible_cpu(i) {
1548                 struct team_pcpu_stats *team_stats;
1549                 team_stats = per_cpu_ptr(team->pcpu_stats, i);
1550                 u64_stats_init(&team_stats->syncp);
1551         }
1552 
1553         for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1554                 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1555         INIT_LIST_HEAD(&team->port_list);
1556         err = team_queue_override_init(team);
1557         if (err)
1558                 goto err_team_queue_override_init;
1559 
1560         team_adjust_ops(team);
1561 
1562         INIT_LIST_HEAD(&team->option_list);
1563         INIT_LIST_HEAD(&team->option_inst_list);
1564 
1565         team_notify_peers_init(team);
1566         team_mcast_rejoin_init(team);
1567 
1568         err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1569         if (err)
1570                 goto err_options_register;
1571         netif_carrier_off(dev);
1572 
1573         team_set_lockdep_class(dev);
1574 
1575         return 0;
1576 
1577 err_options_register:
1578         team_mcast_rejoin_fini(team);
1579         team_notify_peers_fini(team);
1580         team_queue_override_fini(team);
1581 err_team_queue_override_init:
1582         free_percpu(team->pcpu_stats);
1583 
1584         return err;
1585 }
1586 
1587 static void team_uninit(struct net_device *dev)
1588 {
1589         struct team *team = netdev_priv(dev);
1590         struct team_port *port;
1591         struct team_port *tmp;
1592 
1593         mutex_lock(&team->lock);
1594         list_for_each_entry_safe(port, tmp, &team->port_list, list)
1595                 team_port_del(team, port->dev);
1596 
1597         __team_change_mode(team, NULL); /* cleanup */
1598         __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1599         team_mcast_rejoin_fini(team);
1600         team_notify_peers_fini(team);
1601         team_queue_override_fini(team);
1602         mutex_unlock(&team->lock);
1603 }
1604 
1605 static void team_destructor(struct net_device *dev)
1606 {
1607         struct team *team = netdev_priv(dev);
1608 
1609         free_percpu(team->pcpu_stats);
1610         free_netdev(dev);
1611 }
1612 
1613 static int team_open(struct net_device *dev)
1614 {
1615         return 0;
1616 }
1617 
1618 static int team_close(struct net_device *dev)
1619 {
1620         return 0;
1621 }
1622 
1623 /*
1624  * note: already called with rcu_read_lock
1625  */
1626 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1627 {
1628         struct team *team = netdev_priv(dev);
1629         bool tx_success;
1630         unsigned int len = skb->len;
1631 
1632         tx_success = team_queue_override_transmit(team, skb);
1633         if (!tx_success)
1634                 tx_success = team->ops.transmit(team, skb);
1635         if (tx_success) {
1636                 struct team_pcpu_stats *pcpu_stats;
1637 
1638                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1639                 u64_stats_update_begin(&pcpu_stats->syncp);
1640                 pcpu_stats->tx_packets++;
1641                 pcpu_stats->tx_bytes += len;
1642                 u64_stats_update_end(&pcpu_stats->syncp);
1643         } else {
1644                 this_cpu_inc(team->pcpu_stats->tx_dropped);
1645         }
1646 
1647         return NETDEV_TX_OK;
1648 }
1649 
1650 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1651                              void *accel_priv, select_queue_fallback_t fallback)
1652 {
1653         /*
1654          * This helper function exists to help dev_pick_tx get the correct
1655          * destination queue.  Using a helper function skips a call to
1656          * skb_tx_hash and will put the skbs in the queue we expect on their
1657          * way down to the team driver.
1658          */
1659         u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1660 
1661         /*
1662          * Save the original txq to restore before passing to the driver
1663          */
1664         qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1665 
1666         if (unlikely(txq >= dev->real_num_tx_queues)) {
1667                 do {
1668                         txq -= dev->real_num_tx_queues;
1669                 } while (txq >= dev->real_num_tx_queues);
1670         }
1671         return txq;
1672 }
1673 
1674 static void team_change_rx_flags(struct net_device *dev, int change)
1675 {
1676         struct team *team = netdev_priv(dev);
1677         struct team_port *port;
1678         int inc;
1679 
1680         rcu_read_lock();
1681         list_for_each_entry_rcu(port, &team->port_list, list) {
1682                 if (change & IFF_PROMISC) {
1683                         inc = dev->flags & IFF_PROMISC ? 1 : -1;
1684                         dev_set_promiscuity(port->dev, inc);
1685                 }
1686                 if (change & IFF_ALLMULTI) {
1687                         inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1688                         dev_set_allmulti(port->dev, inc);
1689                 }
1690         }
1691         rcu_read_unlock();
1692 }
1693 
1694 static void team_set_rx_mode(struct net_device *dev)
1695 {
1696         struct team *team = netdev_priv(dev);
1697         struct team_port *port;
1698 
1699         rcu_read_lock();
1700         list_for_each_entry_rcu(port, &team->port_list, list) {
1701                 dev_uc_sync_multiple(port->dev, dev);
1702                 dev_mc_sync_multiple(port->dev, dev);
1703         }
1704         rcu_read_unlock();
1705 }
1706 
1707 static int team_set_mac_address(struct net_device *dev, void *p)
1708 {
1709         struct sockaddr *addr = p;
1710         struct team *team = netdev_priv(dev);
1711         struct team_port *port;
1712 
1713         if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1714                 return -EADDRNOTAVAIL;
1715         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1716         rcu_read_lock();
1717         list_for_each_entry_rcu(port, &team->port_list, list)
1718                 if (team->ops.port_change_dev_addr)
1719                         team->ops.port_change_dev_addr(team, port);
1720         rcu_read_unlock();
1721         return 0;
1722 }
1723 
1724 static int team_change_mtu(struct net_device *dev, int new_mtu)
1725 {
1726         struct team *team = netdev_priv(dev);
1727         struct team_port *port;
1728         int err;
1729 
1730         /*
1731          * Alhough this is reader, it's guarded by team lock. It's not possible
1732          * to traverse list in reverse under rcu_read_lock
1733          */
1734         mutex_lock(&team->lock);
1735         list_for_each_entry(port, &team->port_list, list) {
1736                 err = dev_set_mtu(port->dev, new_mtu);
1737                 if (err) {
1738                         netdev_err(dev, "Device %s failed to change mtu",
1739                                    port->dev->name);
1740                         goto unwind;
1741                 }
1742         }
1743         mutex_unlock(&team->lock);
1744 
1745         dev->mtu = new_mtu;
1746 
1747         return 0;
1748 
1749 unwind:
1750         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1751                 dev_set_mtu(port->dev, dev->mtu);
1752         mutex_unlock(&team->lock);
1753 
1754         return err;
1755 }
1756 
1757 static struct rtnl_link_stats64 *
1758 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1759 {
1760         struct team *team = netdev_priv(dev);
1761         struct team_pcpu_stats *p;
1762         u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1763         u32 rx_dropped = 0, tx_dropped = 0;
1764         unsigned int start;
1765         int i;
1766 
1767         for_each_possible_cpu(i) {
1768                 p = per_cpu_ptr(team->pcpu_stats, i);
1769                 do {
1770                         start = u64_stats_fetch_begin_bh(&p->syncp);
1771                         rx_packets      = p->rx_packets;
1772                         rx_bytes        = p->rx_bytes;
1773                         rx_multicast    = p->rx_multicast;
1774                         tx_packets      = p->tx_packets;
1775                         tx_bytes        = p->tx_bytes;
1776                 } while (u64_stats_fetch_retry_bh(&p->syncp, start));
1777 
1778                 stats->rx_packets       += rx_packets;
1779                 stats->rx_bytes         += rx_bytes;
1780                 stats->multicast        += rx_multicast;
1781                 stats->tx_packets       += tx_packets;
1782                 stats->tx_bytes         += tx_bytes;
1783                 /*
1784                  * rx_dropped & tx_dropped are u32, updated
1785                  * without syncp protection.
1786                  */
1787                 rx_dropped      += p->rx_dropped;
1788                 tx_dropped      += p->tx_dropped;
1789         }
1790         stats->rx_dropped       = rx_dropped;
1791         stats->tx_dropped       = tx_dropped;
1792         return stats;
1793 }
1794 
1795 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1796 {
1797         struct team *team = netdev_priv(dev);
1798         struct team_port *port;
1799         int err;
1800 
1801         /*
1802          * Alhough this is reader, it's guarded by team lock. It's not possible
1803          * to traverse list in reverse under rcu_read_lock
1804          */
1805         mutex_lock(&team->lock);
1806         list_for_each_entry(port, &team->port_list, list) {
1807                 err = vlan_vid_add(port->dev, proto, vid);
1808                 if (err)
1809                         goto unwind;
1810         }
1811         mutex_unlock(&team->lock);
1812 
1813         return 0;
1814 
1815 unwind:
1816         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1817                 vlan_vid_del(port->dev, proto, vid);
1818         mutex_unlock(&team->lock);
1819 
1820         return err;
1821 }
1822 
1823 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1824 {
1825         struct team *team = netdev_priv(dev);
1826         struct team_port *port;
1827 
1828         rcu_read_lock();
1829         list_for_each_entry_rcu(port, &team->port_list, list)
1830                 vlan_vid_del(port->dev, proto, vid);
1831         rcu_read_unlock();
1832 
1833         return 0;
1834 }
1835 
1836 #ifdef CONFIG_NET_POLL_CONTROLLER
1837 static void team_poll_controller(struct net_device *dev)
1838 {
1839 }
1840 
1841 static void __team_netpoll_cleanup(struct team *team)
1842 {
1843         struct team_port *port;
1844 
1845         list_for_each_entry(port, &team->port_list, list)
1846                 team_port_disable_netpoll(port);
1847 }
1848 
1849 static void team_netpoll_cleanup(struct net_device *dev)
1850 {
1851         struct team *team = netdev_priv(dev);
1852 
1853         mutex_lock(&team->lock);
1854         __team_netpoll_cleanup(team);
1855         mutex_unlock(&team->lock);
1856 }
1857 
1858 static int team_netpoll_setup(struct net_device *dev,
1859                               struct netpoll_info *npifo, gfp_t gfp)
1860 {
1861         struct team *team = netdev_priv(dev);
1862         struct team_port *port;
1863         int err = 0;
1864 
1865         mutex_lock(&team->lock);
1866         list_for_each_entry(port, &team->port_list, list) {
1867                 err = team_port_enable_netpoll(team, port, gfp);
1868                 if (err) {
1869                         __team_netpoll_cleanup(team);
1870                         break;
1871                 }
1872         }
1873         mutex_unlock(&team->lock);
1874         return err;
1875 }
1876 #endif
1877 
1878 static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
1879 {
1880         struct team *team = netdev_priv(dev);
1881         int err;
1882 
1883         mutex_lock(&team->lock);
1884         err = team_port_add(team, port_dev);
1885         mutex_unlock(&team->lock);
1886         return err;
1887 }
1888 
1889 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1890 {
1891         struct team *team = netdev_priv(dev);
1892         int err;
1893 
1894         mutex_lock(&team->lock);
1895         err = team_port_del(team, port_dev);
1896         mutex_unlock(&team->lock);
1897         return err;
1898 }
1899 
1900 static netdev_features_t team_fix_features(struct net_device *dev,
1901                                            netdev_features_t features)
1902 {
1903         struct team_port *port;
1904         struct team *team = netdev_priv(dev);
1905         netdev_features_t mask;
1906 
1907         mask = features;
1908         features &= ~NETIF_F_ONE_FOR_ALL;
1909         features |= NETIF_F_ALL_FOR_ALL;
1910 
1911         rcu_read_lock();
1912         list_for_each_entry_rcu(port, &team->port_list, list) {
1913                 features = netdev_increment_features(features,
1914                                                      port->dev->features,
1915                                                      mask);
1916         }
1917         rcu_read_unlock();
1918         return features;
1919 }
1920 
1921 static int team_change_carrier(struct net_device *dev, bool new_carrier)
1922 {
1923         struct team *team = netdev_priv(dev);
1924 
1925         team->user_carrier_enabled = true;
1926 
1927         if (new_carrier)
1928                 netif_carrier_on(dev);
1929         else
1930                 netif_carrier_off(dev);
1931         return 0;
1932 }
1933 
1934 static const struct net_device_ops team_netdev_ops = {
1935         .ndo_init               = team_init,
1936         .ndo_uninit             = team_uninit,
1937         .ndo_open               = team_open,
1938         .ndo_stop               = team_close,
1939         .ndo_start_xmit         = team_xmit,
1940         .ndo_select_queue       = team_select_queue,
1941         .ndo_change_rx_flags    = team_change_rx_flags,
1942         .ndo_set_rx_mode        = team_set_rx_mode,
1943         .ndo_set_mac_address    = team_set_mac_address,
1944         .ndo_change_mtu         = team_change_mtu,
1945         .ndo_get_stats64        = team_get_stats64,
1946         .ndo_vlan_rx_add_vid    = team_vlan_rx_add_vid,
1947         .ndo_vlan_rx_kill_vid   = team_vlan_rx_kill_vid,
1948 #ifdef CONFIG_NET_POLL_CONTROLLER
1949         .ndo_poll_controller    = team_poll_controller,
1950         .ndo_netpoll_setup      = team_netpoll_setup,
1951         .ndo_netpoll_cleanup    = team_netpoll_cleanup,
1952 #endif
1953         .ndo_add_slave          = team_add_slave,
1954         .ndo_del_slave          = team_del_slave,
1955         .ndo_fix_features       = team_fix_features,
1956         .ndo_change_carrier     = team_change_carrier,
1957 };
1958 
1959 /***********************
1960  * ethtool interface
1961  ***********************/
1962 
1963 static void team_ethtool_get_drvinfo(struct net_device *dev,
1964                                      struct ethtool_drvinfo *drvinfo)
1965 {
1966         strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
1967         strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
1968 }
1969 
1970 static const struct ethtool_ops team_ethtool_ops = {
1971         .get_drvinfo            = team_ethtool_get_drvinfo,
1972         .get_link               = ethtool_op_get_link,
1973 };
1974 
1975 /***********************
1976  * rt netlink interface
1977  ***********************/
1978 
1979 static void team_setup_by_port(struct net_device *dev,
1980                                struct net_device *port_dev)
1981 {
1982         dev->header_ops = port_dev->header_ops;
1983         dev->type = port_dev->type;
1984         dev->hard_header_len = port_dev->hard_header_len;
1985         dev->addr_len = port_dev->addr_len;
1986         dev->mtu = port_dev->mtu;
1987         memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
1988         eth_hw_addr_inherit(dev, port_dev);
1989 }
1990 
1991 static int team_dev_type_check_change(struct net_device *dev,
1992                                       struct net_device *port_dev)
1993 {
1994         struct team *team = netdev_priv(dev);
1995         char *portname = port_dev->name;
1996         int err;
1997 
1998         if (dev->type == port_dev->type)
1999                 return 0;
2000         if (!list_empty(&team->port_list)) {
2001                 netdev_err(dev, "Device %s is of different type\n", portname);
2002                 return -EBUSY;
2003         }
2004         err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2005         err = notifier_to_errno(err);
2006         if (err) {
2007                 netdev_err(dev, "Refused to change device type\n");
2008                 return err;
2009         }
2010         dev_uc_flush(dev);
2011         dev_mc_flush(dev);
2012         team_setup_by_port(dev, port_dev);
2013         call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2014         return 0;
2015 }
2016 
2017 static void team_setup(struct net_device *dev)
2018 {
2019         ether_setup(dev);
2020 
2021         dev->netdev_ops = &team_netdev_ops;
2022         dev->ethtool_ops = &team_ethtool_ops;
2023         dev->destructor = team_destructor;
2024         dev->tx_queue_len = 0;
2025         dev->flags |= IFF_MULTICAST;
2026         dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2027 
2028         /*
2029          * Indicate we support unicast address filtering. That way core won't
2030          * bring us to promisc mode in case a unicast addr is added.
2031          * Let this up to underlay drivers.
2032          */
2033         dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2034 
2035         dev->features |= NETIF_F_LLTX;
2036         dev->features |= NETIF_F_GRO;
2037 
2038         /* Don't allow team devices to change network namespaces. */
2039         dev->features |= NETIF_F_NETNS_LOCAL;
2040 
2041         dev->hw_features = TEAM_VLAN_FEATURES |
2042                            NETIF_F_HW_VLAN_CTAG_TX |
2043                            NETIF_F_HW_VLAN_CTAG_RX |
2044                            NETIF_F_HW_VLAN_CTAG_FILTER;
2045 
2046         dev->hw_features &= ~(NETIF_F_ALL_CSUM & ~NETIF_F_HW_CSUM);
2047         dev->features |= dev->hw_features;
2048 }
2049 
2050 static int team_newlink(struct net *src_net, struct net_device *dev,
2051                         struct nlattr *tb[], struct nlattr *data[])
2052 {
2053         int err;
2054 
2055         if (tb[IFLA_ADDRESS] == NULL)
2056                 eth_hw_addr_random(dev);
2057 
2058         err = register_netdevice(dev);
2059         if (err)
2060                 return err;
2061 
2062         return 0;
2063 }
2064 
2065 static int team_validate(struct nlattr *tb[], struct nlattr *data[])
2066 {
2067         if (tb[IFLA_ADDRESS]) {
2068                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2069                         return -EINVAL;
2070                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2071                         return -EADDRNOTAVAIL;
2072         }
2073         return 0;
2074 }
2075 
2076 static unsigned int team_get_num_tx_queues(void)
2077 {
2078         return TEAM_DEFAULT_NUM_TX_QUEUES;
2079 }
2080 
2081 static unsigned int team_get_num_rx_queues(void)
2082 {
2083         return TEAM_DEFAULT_NUM_RX_QUEUES;
2084 }
2085 
2086 static struct rtnl_link_ops team_link_ops __read_mostly = {
2087         .kind                   = DRV_NAME,
2088         .priv_size              = sizeof(struct team),
2089         .setup                  = team_setup,
2090         .newlink                = team_newlink,
2091         .validate               = team_validate,
2092         .get_num_tx_queues      = team_get_num_tx_queues,
2093         .get_num_rx_queues      = team_get_num_rx_queues,
2094 };
2095 
2096 
2097 /***********************************
2098  * Generic netlink custom interface
2099  ***********************************/
2100 
2101 static struct genl_family team_nl_family = {
2102         .id             = GENL_ID_GENERATE,
2103         .name           = TEAM_GENL_NAME,
2104         .version        = TEAM_GENL_VERSION,
2105         .maxattr        = TEAM_ATTR_MAX,
2106         .netnsok        = true,
2107 };
2108 
2109 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2110         [TEAM_ATTR_UNSPEC]                      = { .type = NLA_UNSPEC, },
2111         [TEAM_ATTR_TEAM_IFINDEX]                = { .type = NLA_U32 },
2112         [TEAM_ATTR_LIST_OPTION]                 = { .type = NLA_NESTED },
2113         [TEAM_ATTR_LIST_PORT]                   = { .type = NLA_NESTED },
2114 };
2115 
2116 static const struct nla_policy
2117 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2118         [TEAM_ATTR_OPTION_UNSPEC]               = { .type = NLA_UNSPEC, },
2119         [TEAM_ATTR_OPTION_NAME] = {
2120                 .type = NLA_STRING,
2121                 .len = TEAM_STRING_MAX_LEN,
2122         },
2123         [TEAM_ATTR_OPTION_CHANGED]              = { .type = NLA_FLAG },
2124         [TEAM_ATTR_OPTION_TYPE]                 = { .type = NLA_U8 },
2125         [TEAM_ATTR_OPTION_DATA]                 = { .type = NLA_BINARY },
2126 };
2127 
2128 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2129 {
2130         struct sk_buff *msg;
2131         void *hdr;
2132         int err;
2133 
2134         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2135         if (!msg)
2136                 return -ENOMEM;
2137 
2138         hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2139                           &team_nl_family, 0, TEAM_CMD_NOOP);
2140         if (!hdr) {
2141                 err = -EMSGSIZE;
2142                 goto err_msg_put;
2143         }
2144 
2145         genlmsg_end(msg, hdr);
2146 
2147         return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2148 
2149 err_msg_put:
2150         nlmsg_free(msg);
2151 
2152         return err;
2153 }
2154 
2155 /*
2156  * Netlink cmd functions should be locked by following two functions.
2157  * Since dev gets held here, that ensures dev won't disappear in between.
2158  */
2159 static struct team *team_nl_team_get(struct genl_info *info)
2160 {
2161         struct net *net = genl_info_net(info);
2162         int ifindex;
2163         struct net_device *dev;
2164         struct team *team;
2165 
2166         if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2167                 return NULL;
2168 
2169         ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2170         dev = dev_get_by_index(net, ifindex);
2171         if (!dev || dev->netdev_ops != &team_netdev_ops) {
2172                 if (dev)
2173                         dev_put(dev);
2174                 return NULL;
2175         }
2176 
2177         team = netdev_priv(dev);
2178         mutex_lock(&team->lock);
2179         return team;
2180 }
2181 
2182 static void team_nl_team_put(struct team *team)
2183 {
2184         mutex_unlock(&team->lock);
2185         dev_put(team->dev);
2186 }
2187 
2188 typedef int team_nl_send_func_t(struct sk_buff *skb,
2189                                 struct team *team, u32 portid);
2190 
2191 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2192 {
2193         return genlmsg_unicast(dev_net(team->dev), skb, portid);
2194 }
2195 
2196 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2197                                        struct team_option_inst *opt_inst)
2198 {
2199         struct nlattr *option_item;
2200         struct team_option *option = opt_inst->option;
2201         struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2202         struct team_gsetter_ctx ctx;
2203         int err;
2204 
2205         ctx.info = opt_inst_info;
2206         err = team_option_get(team, opt_inst, &ctx);
2207         if (err)
2208                 return err;
2209 
2210         option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
2211         if (!option_item)
2212                 return -EMSGSIZE;
2213 
2214         if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2215                 goto nest_cancel;
2216         if (opt_inst_info->port &&
2217             nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2218                         opt_inst_info->port->dev->ifindex))
2219                 goto nest_cancel;
2220         if (opt_inst->option->array_size &&
2221             nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2222                         opt_inst_info->array_index))
2223                 goto nest_cancel;
2224 
2225         switch (option->type) {
2226         case TEAM_OPTION_TYPE_U32:
2227                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2228                         goto nest_cancel;
2229                 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2230                         goto nest_cancel;
2231                 break;
2232         case TEAM_OPTION_TYPE_STRING:
2233                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2234                         goto nest_cancel;
2235                 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2236                                    ctx.data.str_val))
2237                         goto nest_cancel;
2238                 break;
2239         case TEAM_OPTION_TYPE_BINARY:
2240                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2241                         goto nest_cancel;
2242                 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2243                             ctx.data.bin_val.ptr))
2244                         goto nest_cancel;
2245                 break;
2246         case TEAM_OPTION_TYPE_BOOL:
2247                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2248                         goto nest_cancel;
2249                 if (ctx.data.bool_val &&
2250                     nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2251                         goto nest_cancel;
2252                 break;
2253         case TEAM_OPTION_TYPE_S32:
2254                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2255                         goto nest_cancel;
2256                 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2257                         goto nest_cancel;
2258                 break;
2259         default:
2260                 BUG();
2261         }
2262         if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2263                 goto nest_cancel;
2264         if (opt_inst->changed) {
2265                 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2266                         goto nest_cancel;
2267                 opt_inst->changed = false;
2268         }
2269         nla_nest_end(skb, option_item);
2270         return 0;
2271 
2272 nest_cancel:
2273         nla_nest_cancel(skb, option_item);
2274         return -EMSGSIZE;
2275 }
2276 
2277 static int __send_and_alloc_skb(struct sk_buff **pskb,
2278                                 struct team *team, u32 portid,
2279                                 team_nl_send_func_t *send_func)
2280 {
2281         int err;
2282 
2283         if (*pskb) {
2284                 err = send_func(*pskb, team, portid);
2285                 if (err)
2286                         return err;
2287         }
2288         *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2289         if (!*pskb)
2290                 return -ENOMEM;
2291         return 0;
2292 }
2293 
2294 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2295                                     int flags, team_nl_send_func_t *send_func,
2296                                     struct list_head *sel_opt_inst_list)
2297 {
2298         struct nlattr *option_list;
2299         struct nlmsghdr *nlh;
2300         void *hdr;
2301         struct team_option_inst *opt_inst;
2302         int err;
2303         struct sk_buff *skb = NULL;
2304         bool incomplete;
2305         int i;
2306 
2307         opt_inst = list_first_entry(sel_opt_inst_list,
2308                                     struct team_option_inst, tmp_list);
2309 
2310 start_again:
2311         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2312         if (err)
2313                 return err;
2314 
2315         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2316                           TEAM_CMD_OPTIONS_GET);
2317         if (!hdr)
2318                 return -EMSGSIZE;
2319 
2320         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2321                 goto nla_put_failure;
2322         option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2323         if (!option_list)
2324                 goto nla_put_failure;
2325 
2326         i = 0;
2327         incomplete = false;
2328         list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2329                 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2330                 if (err) {
2331                         if (err == -EMSGSIZE) {
2332                                 if (!i)
2333                                         goto errout;
2334                                 incomplete = true;
2335                                 break;
2336                         }
2337                         goto errout;
2338                 }
2339                 i++;
2340         }
2341 
2342         nla_nest_end(skb, option_list);
2343         genlmsg_end(skb, hdr);
2344         if (incomplete)
2345                 goto start_again;
2346 
2347 send_done:
2348         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2349         if (!nlh) {
2350                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2351                 if (err)
2352                         goto errout;
2353                 goto send_done;
2354         }
2355 
2356         return send_func(skb, team, portid);
2357 
2358 nla_put_failure:
2359         err = -EMSGSIZE;
2360 errout:
2361         genlmsg_cancel(skb, hdr);
2362         nlmsg_free(skb);
2363         return err;
2364 }
2365 
2366 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2367 {
2368         struct team *team;
2369         struct team_option_inst *opt_inst;
2370         int err;
2371         LIST_HEAD(sel_opt_inst_list);
2372 
2373         team = team_nl_team_get(info);
2374         if (!team)
2375                 return -EINVAL;
2376 
2377         list_for_each_entry(opt_inst, &team->option_inst_list, list)
2378                 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2379         err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2380                                        NLM_F_ACK, team_nl_send_unicast,
2381                                        &sel_opt_inst_list);
2382 
2383         team_nl_team_put(team);
2384 
2385         return err;
2386 }
2387 
2388 static int team_nl_send_event_options_get(struct team *team,
2389                                           struct list_head *sel_opt_inst_list);
2390 
2391 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2392 {
2393         struct team *team;
2394         int err = 0;
2395         int i;
2396         struct nlattr *nl_option;
2397         LIST_HEAD(opt_inst_list);
2398 
2399         team = team_nl_team_get(info);
2400         if (!team)
2401                 return -EINVAL;
2402 
2403         err = -EINVAL;
2404         if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2405                 err = -EINVAL;
2406                 goto team_put;
2407         }
2408 
2409         nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2410                 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2411                 struct nlattr *attr;
2412                 struct nlattr *attr_data;
2413                 enum team_option_type opt_type;
2414                 int opt_port_ifindex = 0; /* != 0 for per-port options */
2415                 u32 opt_array_index = 0;
2416                 bool opt_is_array = false;
2417                 struct team_option_inst *opt_inst;
2418                 char *opt_name;
2419                 bool opt_found = false;
2420 
2421                 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2422                         err = -EINVAL;
2423                         goto team_put;
2424                 }
2425                 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2426                                        nl_option, team_nl_option_policy);
2427                 if (err)
2428                         goto team_put;
2429                 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2430                     !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2431                         err = -EINVAL;
2432                         goto team_put;
2433                 }
2434                 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2435                 case NLA_U32:
2436                         opt_type = TEAM_OPTION_TYPE_U32;
2437                         break;
2438                 case NLA_STRING:
2439                         opt_type = TEAM_OPTION_TYPE_STRING;
2440                         break;
2441                 case NLA_BINARY:
2442                         opt_type = TEAM_OPTION_TYPE_BINARY;
2443                         break;
2444                 case NLA_FLAG:
2445                         opt_type = TEAM_OPTION_TYPE_BOOL;
2446                         break;
2447                 case NLA_S32:
2448                         opt_type = TEAM_OPTION_TYPE_S32;
2449                         break;
2450                 default:
2451                         goto team_put;
2452                 }
2453 
2454                 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2455                 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2456                         err = -EINVAL;
2457                         goto team_put;
2458                 }
2459 
2460                 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2461                 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2462                 if (attr)
2463                         opt_port_ifindex = nla_get_u32(attr);
2464 
2465                 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2466                 if (attr) {
2467                         opt_is_array = true;
2468                         opt_array_index = nla_get_u32(attr);
2469                 }
2470 
2471                 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2472                         struct team_option *option = opt_inst->option;
2473                         struct team_gsetter_ctx ctx;
2474                         struct team_option_inst_info *opt_inst_info;
2475                         int tmp_ifindex;
2476 
2477                         opt_inst_info = &opt_inst->info;
2478                         tmp_ifindex = opt_inst_info->port ?
2479                                       opt_inst_info->port->dev->ifindex : 0;
2480                         if (option->type != opt_type ||
2481                             strcmp(option->name, opt_name) ||
2482                             tmp_ifindex != opt_port_ifindex ||
2483                             (option->array_size && !opt_is_array) ||
2484                             opt_inst_info->array_index != opt_array_index)
2485                                 continue;
2486                         opt_found = true;
2487                         ctx.info = opt_inst_info;
2488                         switch (opt_type) {
2489                         case TEAM_OPTION_TYPE_U32:
2490                                 ctx.data.u32_val = nla_get_u32(attr_data);
2491                                 break;
2492                         case TEAM_OPTION_TYPE_STRING:
2493                                 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2494                                         err = -EINVAL;
2495                                         goto team_put;
2496                                 }
2497                                 ctx.data.str_val = nla_data(attr_data);
2498                                 break;
2499                         case TEAM_OPTION_TYPE_BINARY:
2500                                 ctx.data.bin_val.len = nla_len(attr_data);
2501                                 ctx.data.bin_val.ptr = nla_data(attr_data);
2502                                 break;
2503                         case TEAM_OPTION_TYPE_BOOL:
2504                                 ctx.data.bool_val = attr_data ? true : false;
2505                                 break;
2506                         case TEAM_OPTION_TYPE_S32:
2507                                 ctx.data.s32_val = nla_get_s32(attr_data);
2508                                 break;
2509                         default:
2510                                 BUG();
2511                         }
2512                         err = team_option_set(team, opt_inst, &ctx);
2513                         if (err)
2514                                 goto team_put;
2515                         opt_inst->changed = true;
2516                         list_add(&opt_inst->tmp_list, &opt_inst_list);
2517                 }
2518                 if (!opt_found) {
2519                         err = -ENOENT;
2520                         goto team_put;
2521                 }
2522         }
2523 
2524         err = team_nl_send_event_options_get(team, &opt_inst_list);
2525 
2526 team_put:
2527         team_nl_team_put(team);
2528 
2529         return err;
2530 }
2531 
2532 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2533                                      struct team_port *port)
2534 {
2535         struct nlattr *port_item;
2536 
2537         port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2538         if (!port_item)
2539                 goto nest_cancel;
2540         if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2541                 goto nest_cancel;
2542         if (port->changed) {
2543                 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2544                         goto nest_cancel;
2545                 port->changed = false;
2546         }
2547         if ((port->removed &&
2548              nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2549             (port->state.linkup &&
2550              nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2551             nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2552             nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2553                 goto nest_cancel;
2554         nla_nest_end(skb, port_item);
2555         return 0;
2556 
2557 nest_cancel:
2558         nla_nest_cancel(skb, port_item);
2559         return -EMSGSIZE;
2560 }
2561 
2562 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2563                                       int flags, team_nl_send_func_t *send_func,
2564                                       struct team_port *one_port)
2565 {
2566         struct nlattr *port_list;
2567         struct nlmsghdr *nlh;
2568         void *hdr;
2569         struct team_port *port;
2570         int err;
2571         struct sk_buff *skb = NULL;
2572         bool incomplete;
2573         int i;
2574 
2575         port = list_first_entry_or_null(&team->port_list,
2576                                         struct team_port, list);
2577 
2578 start_again:
2579         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2580         if (err)
2581                 return err;
2582 
2583         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2584                           TEAM_CMD_PORT_LIST_GET);
2585         if (!hdr)
2586                 return -EMSGSIZE;
2587 
2588         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2589                 goto nla_put_failure;
2590         port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2591         if (!port_list)
2592                 goto nla_put_failure;
2593 
2594         i = 0;
2595         incomplete = false;
2596 
2597         /* If one port is selected, called wants to send port list containing
2598          * only this port. Otherwise go through all listed ports and send all
2599          */
2600         if (one_port) {
2601                 err = team_nl_fill_one_port_get(skb, one_port);
2602                 if (err)
2603                         goto errout;
2604         } else if (port) {
2605                 list_for_each_entry_from(port, &team->port_list, list) {
2606                         err = team_nl_fill_one_port_get(skb, port);
2607                         if (err) {
2608                                 if (err == -EMSGSIZE) {
2609                                         if (!i)
2610                                                 goto errout;
2611                                         incomplete = true;
2612                                         break;
2613                                 }
2614                                 goto errout;
2615                         }
2616                         i++;
2617                 }
2618         }
2619 
2620         nla_nest_end(skb, port_list);
2621         genlmsg_end(skb, hdr);
2622         if (incomplete)
2623                 goto start_again;
2624 
2625 send_done:
2626         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2627         if (!nlh) {
2628                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2629                 if (err)
2630                         goto errout;
2631                 goto send_done;
2632         }
2633 
2634         return send_func(skb, team, portid);
2635 
2636 nla_put_failure:
2637         err = -EMSGSIZE;
2638 errout:
2639         genlmsg_cancel(skb, hdr);
2640         nlmsg_free(skb);
2641         return err;
2642 }
2643 
2644 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2645                                      struct genl_info *info)
2646 {
2647         struct team *team;
2648         int err;
2649 
2650         team = team_nl_team_get(info);
2651         if (!team)
2652                 return -EINVAL;
2653 
2654         err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2655                                          NLM_F_ACK, team_nl_send_unicast, NULL);
2656 
2657         team_nl_team_put(team);
2658 
2659         return err;
2660 }
2661 
2662 static const struct genl_ops team_nl_ops[] = {
2663         {
2664                 .cmd = TEAM_CMD_NOOP,
2665                 .doit = team_nl_cmd_noop,
2666                 .policy = team_nl_policy,
2667         },
2668         {
2669                 .cmd = TEAM_CMD_OPTIONS_SET,
2670                 .doit = team_nl_cmd_options_set,
2671                 .policy = team_nl_policy,
2672                 .flags = GENL_ADMIN_PERM,
2673         },
2674         {
2675                 .cmd = TEAM_CMD_OPTIONS_GET,
2676                 .doit = team_nl_cmd_options_get,
2677                 .policy = team_nl_policy,
2678                 .flags = GENL_ADMIN_PERM,
2679         },
2680         {
2681                 .cmd = TEAM_CMD_PORT_LIST_GET,
2682                 .doit = team_nl_cmd_port_list_get,
2683                 .policy = team_nl_policy,
2684                 .flags = GENL_ADMIN_PERM,
2685         },
2686 };
2687 
2688 static const struct genl_multicast_group team_nl_mcgrps[] = {
2689         { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2690 };
2691 
2692 static int team_nl_send_multicast(struct sk_buff *skb,
2693                                   struct team *team, u32 portid)
2694 {
2695         return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2696                                        skb, 0, 0, GFP_KERNEL);
2697 }
2698 
2699 static int team_nl_send_event_options_get(struct team *team,
2700                                           struct list_head *sel_opt_inst_list)
2701 {
2702         return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2703                                         sel_opt_inst_list);
2704 }
2705 
2706 static int team_nl_send_event_port_get(struct team *team,
2707                                        struct team_port *port)
2708 {
2709         return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2710                                           port);
2711 }
2712 
2713 static int team_nl_init(void)
2714 {
2715         return genl_register_family_with_ops_groups(&team_nl_family, team_nl_ops,
2716                                                     team_nl_mcgrps);
2717 }
2718 
2719 static void team_nl_fini(void)
2720 {
2721         genl_unregister_family(&team_nl_family);
2722 }
2723 
2724 
2725 /******************
2726  * Change checkers
2727  ******************/
2728 
2729 static void __team_options_change_check(struct team *team)
2730 {
2731         int err;
2732         struct team_option_inst *opt_inst;
2733         LIST_HEAD(sel_opt_inst_list);
2734 
2735         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2736                 if (opt_inst->changed)
2737                         list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2738         }
2739         err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2740         if (err && err != -ESRCH)
2741                 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2742                             err);
2743 }
2744 
2745 /* rtnl lock is held */
2746 
2747 static void __team_port_change_send(struct team_port *port, bool linkup)
2748 {
2749         int err;
2750 
2751         port->changed = true;
2752         port->state.linkup = linkup;
2753         team_refresh_port_linkup(port);
2754         if (linkup) {
2755                 struct ethtool_cmd ecmd;
2756 
2757                 err = __ethtool_get_settings(port->dev, &ecmd);
2758                 if (!err) {
2759                         port->state.speed = ethtool_cmd_speed(&ecmd);
2760                         port->state.duplex = ecmd.duplex;
2761                         goto send_event;
2762                 }
2763         }
2764         port->state.speed = 0;
2765         port->state.duplex = 0;
2766 
2767 send_event:
2768         err = team_nl_send_event_port_get(port->team, port);
2769         if (err && err != -ESRCH)
2770                 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2771                             port->dev->name, err);
2772 
2773 }
2774 
2775 static void __team_carrier_check(struct team *team)
2776 {
2777         struct team_port *port;
2778         bool team_linkup;
2779 
2780         if (team->user_carrier_enabled)
2781                 return;
2782 
2783         team_linkup = false;
2784         list_for_each_entry(port, &team->port_list, list) {
2785                 if (port->linkup) {
2786                         team_linkup = true;
2787                         break;
2788                 }
2789         }
2790 
2791         if (team_linkup)
2792                 netif_carrier_on(team->dev);
2793         else
2794                 netif_carrier_off(team->dev);
2795 }
2796 
2797 static void __team_port_change_check(struct team_port *port, bool linkup)
2798 {
2799         if (port->state.linkup != linkup)
2800                 __team_port_change_send(port, linkup);
2801         __team_carrier_check(port->team);
2802 }
2803 
2804 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2805 {
2806         __team_port_change_send(port, linkup);
2807         __team_carrier_check(port->team);
2808 }
2809 
2810 static void __team_port_change_port_removed(struct team_port *port)
2811 {
2812         port->removed = true;
2813         __team_port_change_send(port, false);
2814         __team_carrier_check(port->team);
2815 }
2816 
2817 static void team_port_change_check(struct team_port *port, bool linkup)
2818 {
2819         struct team *team = port->team;
2820 
2821         mutex_lock(&team->lock);
2822         __team_port_change_check(port, linkup);
2823         mutex_unlock(&team->lock);
2824 }
2825 
2826 
2827 /************************************
2828  * Net device notifier event handler
2829  ************************************/
2830 
2831 static int team_device_event(struct notifier_block *unused,
2832                              unsigned long event, void *ptr)
2833 {
2834         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2835         struct team_port *port;
2836 
2837         port = team_port_get_rtnl(dev);
2838         if (!port)
2839                 return NOTIFY_DONE;
2840 
2841         switch (event) {
2842         case NETDEV_UP:
2843                 if (netif_carrier_ok(dev))
2844                         team_port_change_check(port, true);
2845         case NETDEV_DOWN:
2846                 team_port_change_check(port, false);
2847         case NETDEV_CHANGE:
2848                 if (netif_running(port->dev))
2849                         team_port_change_check(port,
2850                                                !!netif_carrier_ok(port->dev));
2851                 break;
2852         case NETDEV_UNREGISTER:
2853                 team_del_slave(port->team->dev, dev);
2854                 break;
2855         case NETDEV_FEAT_CHANGE:
2856                 team_compute_features(port->team);
2857                 break;
2858         case NETDEV_PRECHANGEMTU:
2859                 /* Forbid to change mtu of underlaying device */
2860                 return NOTIFY_BAD;
2861         case NETDEV_PRE_TYPE_CHANGE:
2862                 /* Forbid to change type of underlaying device */
2863                 return NOTIFY_BAD;
2864         case NETDEV_RESEND_IGMP:
2865                 /* Propagate to master device */
2866                 call_netdevice_notifiers(event, port->team->dev);
2867                 break;
2868         }
2869         return NOTIFY_DONE;
2870 }
2871 
2872 static struct notifier_block team_notifier_block __read_mostly = {
2873         .notifier_call = team_device_event,
2874 };
2875 
2876 
2877 /***********************
2878  * Module init and exit
2879  ***********************/
2880 
2881 static int __init team_module_init(void)
2882 {
2883         int err;
2884 
2885         register_netdevice_notifier(&team_notifier_block);
2886 
2887         err = rtnl_link_register(&team_link_ops);
2888         if (err)
2889                 goto err_rtnl_reg;
2890 
2891         err = team_nl_init();
2892         if (err)
2893                 goto err_nl_init;
2894 
2895         return 0;
2896 
2897 err_nl_init:
2898         rtnl_link_unregister(&team_link_ops);
2899 
2900 err_rtnl_reg:
2901         unregister_netdevice_notifier(&team_notifier_block);
2902 
2903         return err;
2904 }
2905 
2906 static void __exit team_module_exit(void)
2907 {
2908         team_nl_fini();
2909         rtnl_link_unregister(&team_link_ops);
2910         unregister_netdevice_notifier(&team_notifier_block);
2911 }
2912 
2913 module_init(team_module_init);
2914 module_exit(team_module_exit);
2915 
2916 MODULE_LICENSE("GPL v2");
2917 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
2918 MODULE_DESCRIPTION("Ethernet team device driver");
2919 MODULE_ALIAS_RTNL_LINK(DRV_NAME);
2920 

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