Version:  2.0.40 2.2.26 2.4.37 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5 4.6

Linux/drivers/net/team/team.c

  1 /*
  2  * drivers/net/team/team.c - Network team device driver
  3  * Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com>
  4  *
  5  * This program is free software; you can redistribute it and/or modify
  6  * it under the terms of the GNU General Public License as published by
  7  * the Free Software Foundation; either version 2 of the License, or
  8  * (at your option) any later version.
  9  */
 10 
 11 #include <linux/kernel.h>
 12 #include <linux/types.h>
 13 #include <linux/module.h>
 14 #include <linux/init.h>
 15 #include <linux/slab.h>
 16 #include <linux/rcupdate.h>
 17 #include <linux/errno.h>
 18 #include <linux/ctype.h>
 19 #include <linux/notifier.h>
 20 #include <linux/netdevice.h>
 21 #include <linux/netpoll.h>
 22 #include <linux/if_vlan.h>
 23 #include <linux/if_arp.h>
 24 #include <linux/socket.h>
 25 #include <linux/etherdevice.h>
 26 #include <linux/rtnetlink.h>
 27 #include <net/rtnetlink.h>
 28 #include <net/genetlink.h>
 29 #include <net/netlink.h>
 30 #include <net/sch_generic.h>
 31 #include <net/switchdev.h>
 32 #include <generated/utsrelease.h>
 33 #include <linux/if_team.h>
 34 
 35 #define DRV_NAME "team"
 36 
 37 
 38 /**********
 39  * Helpers
 40  **********/
 41 
 42 #define team_port_exists(dev) (dev->priv_flags & IFF_TEAM_PORT)
 43 
 44 static struct team_port *team_port_get_rcu(const struct net_device *dev)
 45 {
 46         return rcu_dereference(dev->rx_handler_data);
 47 }
 48 
 49 static struct team_port *team_port_get_rtnl(const struct net_device *dev)
 50 {
 51         struct team_port *port = rtnl_dereference(dev->rx_handler_data);
 52 
 53         return team_port_exists(dev) ? port : NULL;
 54 }
 55 
 56 /*
 57  * Since the ability to change device address for open port device is tested in
 58  * team_port_add, this function can be called without control of return value
 59  */
 60 static int __set_port_dev_addr(struct net_device *port_dev,
 61                                const unsigned char *dev_addr)
 62 {
 63         struct sockaddr addr;
 64 
 65         memcpy(addr.sa_data, dev_addr, port_dev->addr_len);
 66         addr.sa_family = port_dev->type;
 67         return dev_set_mac_address(port_dev, &addr);
 68 }
 69 
 70 static int team_port_set_orig_dev_addr(struct team_port *port)
 71 {
 72         return __set_port_dev_addr(port->dev, port->orig.dev_addr);
 73 }
 74 
 75 static int team_port_set_team_dev_addr(struct team *team,
 76                                        struct team_port *port)
 77 {
 78         return __set_port_dev_addr(port->dev, team->dev->dev_addr);
 79 }
 80 
 81 int team_modeop_port_enter(struct team *team, struct team_port *port)
 82 {
 83         return team_port_set_team_dev_addr(team, port);
 84 }
 85 EXPORT_SYMBOL(team_modeop_port_enter);
 86 
 87 void team_modeop_port_change_dev_addr(struct team *team,
 88                                       struct team_port *port)
 89 {
 90         team_port_set_team_dev_addr(team, port);
 91 }
 92 EXPORT_SYMBOL(team_modeop_port_change_dev_addr);
 93 
 94 static void team_lower_state_changed(struct team_port *port)
 95 {
 96         struct netdev_lag_lower_state_info info;
 97 
 98         info.link_up = port->linkup;
 99         info.tx_enabled = team_port_enabled(port);
100         netdev_lower_state_changed(port->dev, &info);
101 }
102 
103 static void team_refresh_port_linkup(struct team_port *port)
104 {
105         bool new_linkup = port->user.linkup_enabled ? port->user.linkup :
106                                                       port->state.linkup;
107 
108         if (port->linkup != new_linkup) {
109                 port->linkup = new_linkup;
110                 team_lower_state_changed(port);
111         }
112 }
113 
114 
115 /*******************
116  * Options handling
117  *******************/
118 
119 struct team_option_inst { /* One for each option instance */
120         struct list_head list;
121         struct list_head tmp_list;
122         struct team_option *option;
123         struct team_option_inst_info info;
124         bool changed;
125         bool removed;
126 };
127 
128 static struct team_option *__team_find_option(struct team *team,
129                                               const char *opt_name)
130 {
131         struct team_option *option;
132 
133         list_for_each_entry(option, &team->option_list, list) {
134                 if (strcmp(option->name, opt_name) == 0)
135                         return option;
136         }
137         return NULL;
138 }
139 
140 static void __team_option_inst_del(struct team_option_inst *opt_inst)
141 {
142         list_del(&opt_inst->list);
143         kfree(opt_inst);
144 }
145 
146 static void __team_option_inst_del_option(struct team *team,
147                                           struct team_option *option)
148 {
149         struct team_option_inst *opt_inst, *tmp;
150 
151         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
152                 if (opt_inst->option == option)
153                         __team_option_inst_del(opt_inst);
154         }
155 }
156 
157 static int __team_option_inst_add(struct team *team, struct team_option *option,
158                                   struct team_port *port)
159 {
160         struct team_option_inst *opt_inst;
161         unsigned int array_size;
162         unsigned int i;
163         int err;
164 
165         array_size = option->array_size;
166         if (!array_size)
167                 array_size = 1; /* No array but still need one instance */
168 
169         for (i = 0; i < array_size; i++) {
170                 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL);
171                 if (!opt_inst)
172                         return -ENOMEM;
173                 opt_inst->option = option;
174                 opt_inst->info.port = port;
175                 opt_inst->info.array_index = i;
176                 opt_inst->changed = true;
177                 opt_inst->removed = false;
178                 list_add_tail(&opt_inst->list, &team->option_inst_list);
179                 if (option->init) {
180                         err = option->init(team, &opt_inst->info);
181                         if (err)
182                                 return err;
183                 }
184 
185         }
186         return 0;
187 }
188 
189 static int __team_option_inst_add_option(struct team *team,
190                                          struct team_option *option)
191 {
192         int err;
193 
194         if (!option->per_port) {
195                 err = __team_option_inst_add(team, option, NULL);
196                 if (err)
197                         goto inst_del_option;
198         }
199         return 0;
200 
201 inst_del_option:
202         __team_option_inst_del_option(team, option);
203         return err;
204 }
205 
206 static void __team_option_inst_mark_removed_option(struct team *team,
207                                                    struct team_option *option)
208 {
209         struct team_option_inst *opt_inst;
210 
211         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
212                 if (opt_inst->option == option) {
213                         opt_inst->changed = true;
214                         opt_inst->removed = true;
215                 }
216         }
217 }
218 
219 static void __team_option_inst_del_port(struct team *team,
220                                         struct team_port *port)
221 {
222         struct team_option_inst *opt_inst, *tmp;
223 
224         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
225                 if (opt_inst->option->per_port &&
226                     opt_inst->info.port == port)
227                         __team_option_inst_del(opt_inst);
228         }
229 }
230 
231 static int __team_option_inst_add_port(struct team *team,
232                                        struct team_port *port)
233 {
234         struct team_option *option;
235         int err;
236 
237         list_for_each_entry(option, &team->option_list, list) {
238                 if (!option->per_port)
239                         continue;
240                 err = __team_option_inst_add(team, option, port);
241                 if (err)
242                         goto inst_del_port;
243         }
244         return 0;
245 
246 inst_del_port:
247         __team_option_inst_del_port(team, port);
248         return err;
249 }
250 
251 static void __team_option_inst_mark_removed_port(struct team *team,
252                                                  struct team_port *port)
253 {
254         struct team_option_inst *opt_inst;
255 
256         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
257                 if (opt_inst->info.port == port) {
258                         opt_inst->changed = true;
259                         opt_inst->removed = true;
260                 }
261         }
262 }
263 
264 static int __team_options_register(struct team *team,
265                                    const struct team_option *option,
266                                    size_t option_count)
267 {
268         int i;
269         struct team_option **dst_opts;
270         int err;
271 
272         dst_opts = kzalloc(sizeof(struct team_option *) * option_count,
273                            GFP_KERNEL);
274         if (!dst_opts)
275                 return -ENOMEM;
276         for (i = 0; i < option_count; i++, option++) {
277                 if (__team_find_option(team, option->name)) {
278                         err = -EEXIST;
279                         goto alloc_rollback;
280                 }
281                 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
282                 if (!dst_opts[i]) {
283                         err = -ENOMEM;
284                         goto alloc_rollback;
285                 }
286         }
287 
288         for (i = 0; i < option_count; i++) {
289                 err = __team_option_inst_add_option(team, dst_opts[i]);
290                 if (err)
291                         goto inst_rollback;
292                 list_add_tail(&dst_opts[i]->list, &team->option_list);
293         }
294 
295         kfree(dst_opts);
296         return 0;
297 
298 inst_rollback:
299         for (i--; i >= 0; i--)
300                 __team_option_inst_del_option(team, dst_opts[i]);
301 
302         i = option_count - 1;
303 alloc_rollback:
304         for (i--; i >= 0; i--)
305                 kfree(dst_opts[i]);
306 
307         kfree(dst_opts);
308         return err;
309 }
310 
311 static void __team_options_mark_removed(struct team *team,
312                                         const struct team_option *option,
313                                         size_t option_count)
314 {
315         int i;
316 
317         for (i = 0; i < option_count; i++, option++) {
318                 struct team_option *del_opt;
319 
320                 del_opt = __team_find_option(team, option->name);
321                 if (del_opt)
322                         __team_option_inst_mark_removed_option(team, del_opt);
323         }
324 }
325 
326 static void __team_options_unregister(struct team *team,
327                                       const struct team_option *option,
328                                       size_t option_count)
329 {
330         int i;
331 
332         for (i = 0; i < option_count; i++, option++) {
333                 struct team_option *del_opt;
334 
335                 del_opt = __team_find_option(team, option->name);
336                 if (del_opt) {
337                         __team_option_inst_del_option(team, del_opt);
338                         list_del(&del_opt->list);
339                         kfree(del_opt);
340                 }
341         }
342 }
343 
344 static void __team_options_change_check(struct team *team);
345 
346 int team_options_register(struct team *team,
347                           const struct team_option *option,
348                           size_t option_count)
349 {
350         int err;
351 
352         err = __team_options_register(team, option, option_count);
353         if (err)
354                 return err;
355         __team_options_change_check(team);
356         return 0;
357 }
358 EXPORT_SYMBOL(team_options_register);
359 
360 void team_options_unregister(struct team *team,
361                              const struct team_option *option,
362                              size_t option_count)
363 {
364         __team_options_mark_removed(team, option, option_count);
365         __team_options_change_check(team);
366         __team_options_unregister(team, option, option_count);
367 }
368 EXPORT_SYMBOL(team_options_unregister);
369 
370 static int team_option_get(struct team *team,
371                            struct team_option_inst *opt_inst,
372                            struct team_gsetter_ctx *ctx)
373 {
374         if (!opt_inst->option->getter)
375                 return -EOPNOTSUPP;
376         return opt_inst->option->getter(team, ctx);
377 }
378 
379 static int team_option_set(struct team *team,
380                            struct team_option_inst *opt_inst,
381                            struct team_gsetter_ctx *ctx)
382 {
383         if (!opt_inst->option->setter)
384                 return -EOPNOTSUPP;
385         return opt_inst->option->setter(team, ctx);
386 }
387 
388 void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info)
389 {
390         struct team_option_inst *opt_inst;
391 
392         opt_inst = container_of(opt_inst_info, struct team_option_inst, info);
393         opt_inst->changed = true;
394 }
395 EXPORT_SYMBOL(team_option_inst_set_change);
396 
397 void team_options_change_check(struct team *team)
398 {
399         __team_options_change_check(team);
400 }
401 EXPORT_SYMBOL(team_options_change_check);
402 
403 
404 /****************
405  * Mode handling
406  ****************/
407 
408 static LIST_HEAD(mode_list);
409 static DEFINE_SPINLOCK(mode_list_lock);
410 
411 struct team_mode_item {
412         struct list_head list;
413         const struct team_mode *mode;
414 };
415 
416 static struct team_mode_item *__find_mode(const char *kind)
417 {
418         struct team_mode_item *mitem;
419 
420         list_for_each_entry(mitem, &mode_list, list) {
421                 if (strcmp(mitem->mode->kind, kind) == 0)
422                         return mitem;
423         }
424         return NULL;
425 }
426 
427 static bool is_good_mode_name(const char *name)
428 {
429         while (*name != '\0') {
430                 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
431                         return false;
432                 name++;
433         }
434         return true;
435 }
436 
437 int team_mode_register(const struct team_mode *mode)
438 {
439         int err = 0;
440         struct team_mode_item *mitem;
441 
442         if (!is_good_mode_name(mode->kind) ||
443             mode->priv_size > TEAM_MODE_PRIV_SIZE)
444                 return -EINVAL;
445 
446         mitem = kmalloc(sizeof(*mitem), GFP_KERNEL);
447         if (!mitem)
448                 return -ENOMEM;
449 
450         spin_lock(&mode_list_lock);
451         if (__find_mode(mode->kind)) {
452                 err = -EEXIST;
453                 kfree(mitem);
454                 goto unlock;
455         }
456         mitem->mode = mode;
457         list_add_tail(&mitem->list, &mode_list);
458 unlock:
459         spin_unlock(&mode_list_lock);
460         return err;
461 }
462 EXPORT_SYMBOL(team_mode_register);
463 
464 void team_mode_unregister(const struct team_mode *mode)
465 {
466         struct team_mode_item *mitem;
467 
468         spin_lock(&mode_list_lock);
469         mitem = __find_mode(mode->kind);
470         if (mitem) {
471                 list_del_init(&mitem->list);
472                 kfree(mitem);
473         }
474         spin_unlock(&mode_list_lock);
475 }
476 EXPORT_SYMBOL(team_mode_unregister);
477 
478 static const struct team_mode *team_mode_get(const char *kind)
479 {
480         struct team_mode_item *mitem;
481         const struct team_mode *mode = NULL;
482 
483         spin_lock(&mode_list_lock);
484         mitem = __find_mode(kind);
485         if (!mitem) {
486                 spin_unlock(&mode_list_lock);
487                 request_module("team-mode-%s", kind);
488                 spin_lock(&mode_list_lock);
489                 mitem = __find_mode(kind);
490         }
491         if (mitem) {
492                 mode = mitem->mode;
493                 if (!try_module_get(mode->owner))
494                         mode = NULL;
495         }
496 
497         spin_unlock(&mode_list_lock);
498         return mode;
499 }
500 
501 static void team_mode_put(const struct team_mode *mode)
502 {
503         module_put(mode->owner);
504 }
505 
506 static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
507 {
508         dev_kfree_skb_any(skb);
509         return false;
510 }
511 
512 static rx_handler_result_t team_dummy_receive(struct team *team,
513                                               struct team_port *port,
514                                               struct sk_buff *skb)
515 {
516         return RX_HANDLER_ANOTHER;
517 }
518 
519 static const struct team_mode __team_no_mode = {
520         .kind           = "*NOMODE*",
521 };
522 
523 static bool team_is_mode_set(struct team *team)
524 {
525         return team->mode != &__team_no_mode;
526 }
527 
528 static void team_set_no_mode(struct team *team)
529 {
530         team->user_carrier_enabled = false;
531         team->mode = &__team_no_mode;
532 }
533 
534 static void team_adjust_ops(struct team *team)
535 {
536         /*
537          * To avoid checks in rx/tx skb paths, ensure here that non-null and
538          * correct ops are always set.
539          */
540 
541         if (!team->en_port_count || !team_is_mode_set(team) ||
542             !team->mode->ops->transmit)
543                 team->ops.transmit = team_dummy_transmit;
544         else
545                 team->ops.transmit = team->mode->ops->transmit;
546 
547         if (!team->en_port_count || !team_is_mode_set(team) ||
548             !team->mode->ops->receive)
549                 team->ops.receive = team_dummy_receive;
550         else
551                 team->ops.receive = team->mode->ops->receive;
552 }
553 
554 /*
555  * We can benefit from the fact that it's ensured no port is present
556  * at the time of mode change. Therefore no packets are in fly so there's no
557  * need to set mode operations in any special way.
558  */
559 static int __team_change_mode(struct team *team,
560                               const struct team_mode *new_mode)
561 {
562         /* Check if mode was previously set and do cleanup if so */
563         if (team_is_mode_set(team)) {
564                 void (*exit_op)(struct team *team) = team->ops.exit;
565 
566                 /* Clear ops area so no callback is called any longer */
567                 memset(&team->ops, 0, sizeof(struct team_mode_ops));
568                 team_adjust_ops(team);
569 
570                 if (exit_op)
571                         exit_op(team);
572                 team_mode_put(team->mode);
573                 team_set_no_mode(team);
574                 /* zero private data area */
575                 memset(&team->mode_priv, 0,
576                        sizeof(struct team) - offsetof(struct team, mode_priv));
577         }
578 
579         if (!new_mode)
580                 return 0;
581 
582         if (new_mode->ops->init) {
583                 int err;
584 
585                 err = new_mode->ops->init(team);
586                 if (err)
587                         return err;
588         }
589 
590         team->mode = new_mode;
591         memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
592         team_adjust_ops(team);
593 
594         return 0;
595 }
596 
597 static int team_change_mode(struct team *team, const char *kind)
598 {
599         const struct team_mode *new_mode;
600         struct net_device *dev = team->dev;
601         int err;
602 
603         if (!list_empty(&team->port_list)) {
604                 netdev_err(dev, "No ports can be present during mode change\n");
605                 return -EBUSY;
606         }
607 
608         if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) {
609                 netdev_err(dev, "Unable to change to the same mode the team is in\n");
610                 return -EINVAL;
611         }
612 
613         new_mode = team_mode_get(kind);
614         if (!new_mode) {
615                 netdev_err(dev, "Mode \"%s\" not found\n", kind);
616                 return -EINVAL;
617         }
618 
619         err = __team_change_mode(team, new_mode);
620         if (err) {
621                 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
622                 team_mode_put(new_mode);
623                 return err;
624         }
625 
626         netdev_info(dev, "Mode changed to \"%s\"\n", kind);
627         return 0;
628 }
629 
630 
631 /*********************
632  * Peers notification
633  *********************/
634 
635 static void team_notify_peers_work(struct work_struct *work)
636 {
637         struct team *team;
638         int val;
639 
640         team = container_of(work, struct team, notify_peers.dw.work);
641 
642         if (!rtnl_trylock()) {
643                 schedule_delayed_work(&team->notify_peers.dw, 0);
644                 return;
645         }
646         val = atomic_dec_if_positive(&team->notify_peers.count_pending);
647         if (val < 0) {
648                 rtnl_unlock();
649                 return;
650         }
651         call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, team->dev);
652         rtnl_unlock();
653         if (val)
654                 schedule_delayed_work(&team->notify_peers.dw,
655                                       msecs_to_jiffies(team->notify_peers.interval));
656 }
657 
658 static void team_notify_peers(struct team *team)
659 {
660         if (!team->notify_peers.count || !netif_running(team->dev))
661                 return;
662         atomic_add(team->notify_peers.count, &team->notify_peers.count_pending);
663         schedule_delayed_work(&team->notify_peers.dw, 0);
664 }
665 
666 static void team_notify_peers_init(struct team *team)
667 {
668         INIT_DELAYED_WORK(&team->notify_peers.dw, team_notify_peers_work);
669 }
670 
671 static void team_notify_peers_fini(struct team *team)
672 {
673         cancel_delayed_work_sync(&team->notify_peers.dw);
674 }
675 
676 
677 /*******************************
678  * Send multicast group rejoins
679  *******************************/
680 
681 static void team_mcast_rejoin_work(struct work_struct *work)
682 {
683         struct team *team;
684         int val;
685 
686         team = container_of(work, struct team, mcast_rejoin.dw.work);
687 
688         if (!rtnl_trylock()) {
689                 schedule_delayed_work(&team->mcast_rejoin.dw, 0);
690                 return;
691         }
692         val = atomic_dec_if_positive(&team->mcast_rejoin.count_pending);
693         if (val < 0) {
694                 rtnl_unlock();
695                 return;
696         }
697         call_netdevice_notifiers(NETDEV_RESEND_IGMP, team->dev);
698         rtnl_unlock();
699         if (val)
700                 schedule_delayed_work(&team->mcast_rejoin.dw,
701                                       msecs_to_jiffies(team->mcast_rejoin.interval));
702 }
703 
704 static void team_mcast_rejoin(struct team *team)
705 {
706         if (!team->mcast_rejoin.count || !netif_running(team->dev))
707                 return;
708         atomic_add(team->mcast_rejoin.count, &team->mcast_rejoin.count_pending);
709         schedule_delayed_work(&team->mcast_rejoin.dw, 0);
710 }
711 
712 static void team_mcast_rejoin_init(struct team *team)
713 {
714         INIT_DELAYED_WORK(&team->mcast_rejoin.dw, team_mcast_rejoin_work);
715 }
716 
717 static void team_mcast_rejoin_fini(struct team *team)
718 {
719         cancel_delayed_work_sync(&team->mcast_rejoin.dw);
720 }
721 
722 
723 /************************
724  * Rx path frame handler
725  ************************/
726 
727 /* note: already called with rcu_read_lock */
728 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
729 {
730         struct sk_buff *skb = *pskb;
731         struct team_port *port;
732         struct team *team;
733         rx_handler_result_t res;
734 
735         skb = skb_share_check(skb, GFP_ATOMIC);
736         if (!skb)
737                 return RX_HANDLER_CONSUMED;
738 
739         *pskb = skb;
740 
741         port = team_port_get_rcu(skb->dev);
742         team = port->team;
743         if (!team_port_enabled(port)) {
744                 /* allow exact match delivery for disabled ports */
745                 res = RX_HANDLER_EXACT;
746         } else {
747                 res = team->ops.receive(team, port, skb);
748         }
749         if (res == RX_HANDLER_ANOTHER) {
750                 struct team_pcpu_stats *pcpu_stats;
751 
752                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
753                 u64_stats_update_begin(&pcpu_stats->syncp);
754                 pcpu_stats->rx_packets++;
755                 pcpu_stats->rx_bytes += skb->len;
756                 if (skb->pkt_type == PACKET_MULTICAST)
757                         pcpu_stats->rx_multicast++;
758                 u64_stats_update_end(&pcpu_stats->syncp);
759 
760                 skb->dev = team->dev;
761         } else if (res == RX_HANDLER_EXACT) {
762                 this_cpu_inc(team->pcpu_stats->rx_nohandler);
763         } else {
764                 this_cpu_inc(team->pcpu_stats->rx_dropped);
765         }
766 
767         return res;
768 }
769 
770 
771 /*************************************
772  * Multiqueue Tx port select override
773  *************************************/
774 
775 static int team_queue_override_init(struct team *team)
776 {
777         struct list_head *listarr;
778         unsigned int queue_cnt = team->dev->num_tx_queues - 1;
779         unsigned int i;
780 
781         if (!queue_cnt)
782                 return 0;
783         listarr = kmalloc(sizeof(struct list_head) * queue_cnt, GFP_KERNEL);
784         if (!listarr)
785                 return -ENOMEM;
786         team->qom_lists = listarr;
787         for (i = 0; i < queue_cnt; i++)
788                 INIT_LIST_HEAD(listarr++);
789         return 0;
790 }
791 
792 static void team_queue_override_fini(struct team *team)
793 {
794         kfree(team->qom_lists);
795 }
796 
797 static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
798 {
799         return &team->qom_lists[queue_id - 1];
800 }
801 
802 /*
803  * note: already called with rcu_read_lock
804  */
805 static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
806 {
807         struct list_head *qom_list;
808         struct team_port *port;
809 
810         if (!team->queue_override_enabled || !skb->queue_mapping)
811                 return false;
812         qom_list = __team_get_qom_list(team, skb->queue_mapping);
813         list_for_each_entry_rcu(port, qom_list, qom_list) {
814                 if (!team_dev_queue_xmit(team, port, skb))
815                         return true;
816         }
817         return false;
818 }
819 
820 static void __team_queue_override_port_del(struct team *team,
821                                            struct team_port *port)
822 {
823         if (!port->queue_id)
824                 return;
825         list_del_rcu(&port->qom_list);
826 }
827 
828 static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
829                                                       struct team_port *cur)
830 {
831         if (port->priority < cur->priority)
832                 return true;
833         if (port->priority > cur->priority)
834                 return false;
835         if (port->index < cur->index)
836                 return true;
837         return false;
838 }
839 
840 static void __team_queue_override_port_add(struct team *team,
841                                            struct team_port *port)
842 {
843         struct team_port *cur;
844         struct list_head *qom_list;
845         struct list_head *node;
846 
847         if (!port->queue_id)
848                 return;
849         qom_list = __team_get_qom_list(team, port->queue_id);
850         node = qom_list;
851         list_for_each_entry(cur, qom_list, qom_list) {
852                 if (team_queue_override_port_has_gt_prio_than(port, cur))
853                         break;
854                 node = &cur->qom_list;
855         }
856         list_add_tail_rcu(&port->qom_list, node);
857 }
858 
859 static void __team_queue_override_enabled_check(struct team *team)
860 {
861         struct team_port *port;
862         bool enabled = false;
863 
864         list_for_each_entry(port, &team->port_list, list) {
865                 if (port->queue_id) {
866                         enabled = true;
867                         break;
868                 }
869         }
870         if (enabled == team->queue_override_enabled)
871                 return;
872         netdev_dbg(team->dev, "%s queue override\n",
873                    enabled ? "Enabling" : "Disabling");
874         team->queue_override_enabled = enabled;
875 }
876 
877 static void team_queue_override_port_prio_changed(struct team *team,
878                                                   struct team_port *port)
879 {
880         if (!port->queue_id || team_port_enabled(port))
881                 return;
882         __team_queue_override_port_del(team, port);
883         __team_queue_override_port_add(team, port);
884         __team_queue_override_enabled_check(team);
885 }
886 
887 static void team_queue_override_port_change_queue_id(struct team *team,
888                                                      struct team_port *port,
889                                                      u16 new_queue_id)
890 {
891         if (team_port_enabled(port)) {
892                 __team_queue_override_port_del(team, port);
893                 port->queue_id = new_queue_id;
894                 __team_queue_override_port_add(team, port);
895                 __team_queue_override_enabled_check(team);
896         } else {
897                 port->queue_id = new_queue_id;
898         }
899 }
900 
901 static void team_queue_override_port_add(struct team *team,
902                                          struct team_port *port)
903 {
904         __team_queue_override_port_add(team, port);
905         __team_queue_override_enabled_check(team);
906 }
907 
908 static void team_queue_override_port_del(struct team *team,
909                                          struct team_port *port)
910 {
911         __team_queue_override_port_del(team, port);
912         __team_queue_override_enabled_check(team);
913 }
914 
915 
916 /****************
917  * Port handling
918  ****************/
919 
920 static bool team_port_find(const struct team *team,
921                            const struct team_port *port)
922 {
923         struct team_port *cur;
924 
925         list_for_each_entry(cur, &team->port_list, list)
926                 if (cur == port)
927                         return true;
928         return false;
929 }
930 
931 /*
932  * Enable/disable port by adding to enabled port hashlist and setting
933  * port->index (Might be racy so reader could see incorrect ifindex when
934  * processing a flying packet, but that is not a problem). Write guarded
935  * by team->lock.
936  */
937 static void team_port_enable(struct team *team,
938                              struct team_port *port)
939 {
940         if (team_port_enabled(port))
941                 return;
942         port->index = team->en_port_count++;
943         hlist_add_head_rcu(&port->hlist,
944                            team_port_index_hash(team, port->index));
945         team_adjust_ops(team);
946         team_queue_override_port_add(team, port);
947         if (team->ops.port_enabled)
948                 team->ops.port_enabled(team, port);
949         team_notify_peers(team);
950         team_mcast_rejoin(team);
951         team_lower_state_changed(port);
952 }
953 
954 static void __reconstruct_port_hlist(struct team *team, int rm_index)
955 {
956         int i;
957         struct team_port *port;
958 
959         for (i = rm_index + 1; i < team->en_port_count; i++) {
960                 port = team_get_port_by_index(team, i);
961                 hlist_del_rcu(&port->hlist);
962                 port->index--;
963                 hlist_add_head_rcu(&port->hlist,
964                                    team_port_index_hash(team, port->index));
965         }
966 }
967 
968 static void team_port_disable(struct team *team,
969                               struct team_port *port)
970 {
971         if (!team_port_enabled(port))
972                 return;
973         if (team->ops.port_disabled)
974                 team->ops.port_disabled(team, port);
975         hlist_del_rcu(&port->hlist);
976         __reconstruct_port_hlist(team, port->index);
977         port->index = -1;
978         team->en_port_count--;
979         team_queue_override_port_del(team, port);
980         team_adjust_ops(team);
981         team_notify_peers(team);
982         team_mcast_rejoin(team);
983         team_lower_state_changed(port);
984 }
985 
986 #define TEAM_VLAN_FEATURES (NETIF_F_HW_CSUM | NETIF_F_SG | \
987                             NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
988                             NETIF_F_HIGHDMA | NETIF_F_LRO)
989 
990 #define TEAM_ENC_FEATURES       (NETIF_F_HW_CSUM | NETIF_F_SG | \
991                                  NETIF_F_RXCSUM | NETIF_F_ALL_TSO)
992 
993 static void __team_compute_features(struct team *team)
994 {
995         struct team_port *port;
996         u32 vlan_features = TEAM_VLAN_FEATURES & NETIF_F_ALL_FOR_ALL;
997         netdev_features_t enc_features  = TEAM_ENC_FEATURES;
998         unsigned short max_hard_header_len = ETH_HLEN;
999         unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE |
1000                                         IFF_XMIT_DST_RELEASE_PERM;
1001 
1002         list_for_each_entry(port, &team->port_list, list) {
1003                 vlan_features = netdev_increment_features(vlan_features,
1004                                         port->dev->vlan_features,
1005                                         TEAM_VLAN_FEATURES);
1006                 enc_features =
1007                         netdev_increment_features(enc_features,
1008                                                   port->dev->hw_enc_features,
1009                                                   TEAM_ENC_FEATURES);
1010 
1011 
1012                 dst_release_flag &= port->dev->priv_flags;
1013                 if (port->dev->hard_header_len > max_hard_header_len)
1014                         max_hard_header_len = port->dev->hard_header_len;
1015         }
1016 
1017         team->dev->vlan_features = vlan_features;
1018         team->dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL;
1019         team->dev->hard_header_len = max_hard_header_len;
1020 
1021         team->dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
1022         if (dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
1023                 team->dev->priv_flags |= IFF_XMIT_DST_RELEASE;
1024 
1025         netdev_change_features(team->dev);
1026 }
1027 
1028 static void team_compute_features(struct team *team)
1029 {
1030         mutex_lock(&team->lock);
1031         __team_compute_features(team);
1032         mutex_unlock(&team->lock);
1033 }
1034 
1035 static int team_port_enter(struct team *team, struct team_port *port)
1036 {
1037         int err = 0;
1038 
1039         dev_hold(team->dev);
1040         if (team->ops.port_enter) {
1041                 err = team->ops.port_enter(team, port);
1042                 if (err) {
1043                         netdev_err(team->dev, "Device %s failed to enter team mode\n",
1044                                    port->dev->name);
1045                         goto err_port_enter;
1046                 }
1047         }
1048 
1049         return 0;
1050 
1051 err_port_enter:
1052         dev_put(team->dev);
1053 
1054         return err;
1055 }
1056 
1057 static void team_port_leave(struct team *team, struct team_port *port)
1058 {
1059         if (team->ops.port_leave)
1060                 team->ops.port_leave(team, port);
1061         dev_put(team->dev);
1062 }
1063 
1064 #ifdef CONFIG_NET_POLL_CONTROLLER
1065 static int team_port_enable_netpoll(struct team *team, struct team_port *port)
1066 {
1067         struct netpoll *np;
1068         int err;
1069 
1070         if (!team->dev->npinfo)
1071                 return 0;
1072 
1073         np = kzalloc(sizeof(*np), GFP_KERNEL);
1074         if (!np)
1075                 return -ENOMEM;
1076 
1077         err = __netpoll_setup(np, port->dev);
1078         if (err) {
1079                 kfree(np);
1080                 return err;
1081         }
1082         port->np = np;
1083         return err;
1084 }
1085 
1086 static void team_port_disable_netpoll(struct team_port *port)
1087 {
1088         struct netpoll *np = port->np;
1089 
1090         if (!np)
1091                 return;
1092         port->np = NULL;
1093 
1094         /* Wait for transmitting packets to finish before freeing. */
1095         synchronize_rcu_bh();
1096         __netpoll_cleanup(np);
1097         kfree(np);
1098 }
1099 #else
1100 static int team_port_enable_netpoll(struct team *team, struct team_port *port)
1101 {
1102         return 0;
1103 }
1104 static void team_port_disable_netpoll(struct team_port *port)
1105 {
1106 }
1107 #endif
1108 
1109 static int team_upper_dev_link(struct team *team, struct team_port *port)
1110 {
1111         struct netdev_lag_upper_info lag_upper_info;
1112         int err;
1113 
1114         lag_upper_info.tx_type = team->mode->lag_tx_type;
1115         err = netdev_master_upper_dev_link(port->dev, team->dev, NULL,
1116                                            &lag_upper_info);
1117         if (err)
1118                 return err;
1119         port->dev->priv_flags |= IFF_TEAM_PORT;
1120         return 0;
1121 }
1122 
1123 static void team_upper_dev_unlink(struct team *team, struct team_port *port)
1124 {
1125         netdev_upper_dev_unlink(port->dev, team->dev);
1126         port->dev->priv_flags &= ~IFF_TEAM_PORT;
1127 }
1128 
1129 static void __team_port_change_port_added(struct team_port *port, bool linkup);
1130 static int team_dev_type_check_change(struct net_device *dev,
1131                                       struct net_device *port_dev);
1132 
1133 static int team_port_add(struct team *team, struct net_device *port_dev)
1134 {
1135         struct net_device *dev = team->dev;
1136         struct team_port *port;
1137         char *portname = port_dev->name;
1138         int err;
1139 
1140         if (port_dev->flags & IFF_LOOPBACK) {
1141                 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
1142                            portname);
1143                 return -EINVAL;
1144         }
1145 
1146         if (team_port_exists(port_dev)) {
1147                 netdev_err(dev, "Device %s is already a port "
1148                                 "of a team device\n", portname);
1149                 return -EBUSY;
1150         }
1151 
1152         if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1153             vlan_uses_dev(dev)) {
1154                 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1155                            portname);
1156                 return -EPERM;
1157         }
1158 
1159         err = team_dev_type_check_change(dev, port_dev);
1160         if (err)
1161                 return err;
1162 
1163         if (port_dev->flags & IFF_UP) {
1164                 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1165                            portname);
1166                 return -EBUSY;
1167         }
1168 
1169         port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1170                        GFP_KERNEL);
1171         if (!port)
1172                 return -ENOMEM;
1173 
1174         port->dev = port_dev;
1175         port->team = team;
1176         INIT_LIST_HEAD(&port->qom_list);
1177 
1178         port->orig.mtu = port_dev->mtu;
1179         err = dev_set_mtu(port_dev, dev->mtu);
1180         if (err) {
1181                 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1182                 goto err_set_mtu;
1183         }
1184 
1185         memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1186 
1187         err = team_port_enter(team, port);
1188         if (err) {
1189                 netdev_err(dev, "Device %s failed to enter team mode\n",
1190                            portname);
1191                 goto err_port_enter;
1192         }
1193 
1194         err = dev_open(port_dev);
1195         if (err) {
1196                 netdev_dbg(dev, "Device %s opening failed\n",
1197                            portname);
1198                 goto err_dev_open;
1199         }
1200 
1201         dev_uc_sync_multiple(port_dev, dev);
1202         dev_mc_sync_multiple(port_dev, dev);
1203 
1204         err = vlan_vids_add_by_dev(port_dev, dev);
1205         if (err) {
1206                 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1207                                 portname);
1208                 goto err_vids_add;
1209         }
1210 
1211         err = team_port_enable_netpoll(team, port);
1212         if (err) {
1213                 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1214                            portname);
1215                 goto err_enable_netpoll;
1216         }
1217 
1218         if (!(dev->features & NETIF_F_LRO))
1219                 dev_disable_lro(port_dev);
1220 
1221         err = netdev_rx_handler_register(port_dev, team_handle_frame,
1222                                          port);
1223         if (err) {
1224                 netdev_err(dev, "Device %s failed to register rx_handler\n",
1225                            portname);
1226                 goto err_handler_register;
1227         }
1228 
1229         err = team_upper_dev_link(team, port);
1230         if (err) {
1231                 netdev_err(dev, "Device %s failed to set upper link\n",
1232                            portname);
1233                 goto err_set_upper_link;
1234         }
1235 
1236         err = __team_option_inst_add_port(team, port);
1237         if (err) {
1238                 netdev_err(dev, "Device %s failed to add per-port options\n",
1239                            portname);
1240                 goto err_option_port_add;
1241         }
1242 
1243         port->index = -1;
1244         list_add_tail_rcu(&port->list, &team->port_list);
1245         team_port_enable(team, port);
1246         __team_compute_features(team);
1247         __team_port_change_port_added(port, !!netif_carrier_ok(port_dev));
1248         __team_options_change_check(team);
1249 
1250         netdev_info(dev, "Port device %s added\n", portname);
1251 
1252         return 0;
1253 
1254 err_option_port_add:
1255         team_upper_dev_unlink(team, port);
1256 
1257 err_set_upper_link:
1258         netdev_rx_handler_unregister(port_dev);
1259 
1260 err_handler_register:
1261         team_port_disable_netpoll(port);
1262 
1263 err_enable_netpoll:
1264         vlan_vids_del_by_dev(port_dev, dev);
1265 
1266 err_vids_add:
1267         dev_uc_unsync(port_dev, dev);
1268         dev_mc_unsync(port_dev, dev);
1269         dev_close(port_dev);
1270 
1271 err_dev_open:
1272         team_port_leave(team, port);
1273         team_port_set_orig_dev_addr(port);
1274 
1275 err_port_enter:
1276         dev_set_mtu(port_dev, port->orig.mtu);
1277 
1278 err_set_mtu:
1279         kfree(port);
1280 
1281         return err;
1282 }
1283 
1284 static void __team_port_change_port_removed(struct team_port *port);
1285 
1286 static int team_port_del(struct team *team, struct net_device *port_dev)
1287 {
1288         struct net_device *dev = team->dev;
1289         struct team_port *port;
1290         char *portname = port_dev->name;
1291 
1292         port = team_port_get_rtnl(port_dev);
1293         if (!port || !team_port_find(team, port)) {
1294                 netdev_err(dev, "Device %s does not act as a port of this team\n",
1295                            portname);
1296                 return -ENOENT;
1297         }
1298 
1299         team_port_disable(team, port);
1300         list_del_rcu(&port->list);
1301         team_upper_dev_unlink(team, port);
1302         netdev_rx_handler_unregister(port_dev);
1303         team_port_disable_netpoll(port);
1304         vlan_vids_del_by_dev(port_dev, dev);
1305         dev_uc_unsync(port_dev, dev);
1306         dev_mc_unsync(port_dev, dev);
1307         dev_close(port_dev);
1308         team_port_leave(team, port);
1309 
1310         __team_option_inst_mark_removed_port(team, port);
1311         __team_options_change_check(team);
1312         __team_option_inst_del_port(team, port);
1313         __team_port_change_port_removed(port);
1314 
1315         team_port_set_orig_dev_addr(port);
1316         dev_set_mtu(port_dev, port->orig.mtu);
1317         kfree_rcu(port, rcu);
1318         netdev_info(dev, "Port device %s removed\n", portname);
1319         __team_compute_features(team);
1320 
1321         return 0;
1322 }
1323 
1324 
1325 /*****************
1326  * Net device ops
1327  *****************/
1328 
1329 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1330 {
1331         ctx->data.str_val = team->mode->kind;
1332         return 0;
1333 }
1334 
1335 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1336 {
1337         return team_change_mode(team, ctx->data.str_val);
1338 }
1339 
1340 static int team_notify_peers_count_get(struct team *team,
1341                                        struct team_gsetter_ctx *ctx)
1342 {
1343         ctx->data.u32_val = team->notify_peers.count;
1344         return 0;
1345 }
1346 
1347 static int team_notify_peers_count_set(struct team *team,
1348                                        struct team_gsetter_ctx *ctx)
1349 {
1350         team->notify_peers.count = ctx->data.u32_val;
1351         return 0;
1352 }
1353 
1354 static int team_notify_peers_interval_get(struct team *team,
1355                                           struct team_gsetter_ctx *ctx)
1356 {
1357         ctx->data.u32_val = team->notify_peers.interval;
1358         return 0;
1359 }
1360 
1361 static int team_notify_peers_interval_set(struct team *team,
1362                                           struct team_gsetter_ctx *ctx)
1363 {
1364         team->notify_peers.interval = ctx->data.u32_val;
1365         return 0;
1366 }
1367 
1368 static int team_mcast_rejoin_count_get(struct team *team,
1369                                        struct team_gsetter_ctx *ctx)
1370 {
1371         ctx->data.u32_val = team->mcast_rejoin.count;
1372         return 0;
1373 }
1374 
1375 static int team_mcast_rejoin_count_set(struct team *team,
1376                                        struct team_gsetter_ctx *ctx)
1377 {
1378         team->mcast_rejoin.count = ctx->data.u32_val;
1379         return 0;
1380 }
1381 
1382 static int team_mcast_rejoin_interval_get(struct team *team,
1383                                           struct team_gsetter_ctx *ctx)
1384 {
1385         ctx->data.u32_val = team->mcast_rejoin.interval;
1386         return 0;
1387 }
1388 
1389 static int team_mcast_rejoin_interval_set(struct team *team,
1390                                           struct team_gsetter_ctx *ctx)
1391 {
1392         team->mcast_rejoin.interval = ctx->data.u32_val;
1393         return 0;
1394 }
1395 
1396 static int team_port_en_option_get(struct team *team,
1397                                    struct team_gsetter_ctx *ctx)
1398 {
1399         struct team_port *port = ctx->info->port;
1400 
1401         ctx->data.bool_val = team_port_enabled(port);
1402         return 0;
1403 }
1404 
1405 static int team_port_en_option_set(struct team *team,
1406                                    struct team_gsetter_ctx *ctx)
1407 {
1408         struct team_port *port = ctx->info->port;
1409 
1410         if (ctx->data.bool_val)
1411                 team_port_enable(team, port);
1412         else
1413                 team_port_disable(team, port);
1414         return 0;
1415 }
1416 
1417 static int team_user_linkup_option_get(struct team *team,
1418                                        struct team_gsetter_ctx *ctx)
1419 {
1420         struct team_port *port = ctx->info->port;
1421 
1422         ctx->data.bool_val = port->user.linkup;
1423         return 0;
1424 }
1425 
1426 static void __team_carrier_check(struct team *team);
1427 
1428 static int team_user_linkup_option_set(struct team *team,
1429                                        struct team_gsetter_ctx *ctx)
1430 {
1431         struct team_port *port = ctx->info->port;
1432 
1433         port->user.linkup = ctx->data.bool_val;
1434         team_refresh_port_linkup(port);
1435         __team_carrier_check(port->team);
1436         return 0;
1437 }
1438 
1439 static int team_user_linkup_en_option_get(struct team *team,
1440                                           struct team_gsetter_ctx *ctx)
1441 {
1442         struct team_port *port = ctx->info->port;
1443 
1444         ctx->data.bool_val = port->user.linkup_enabled;
1445         return 0;
1446 }
1447 
1448 static int team_user_linkup_en_option_set(struct team *team,
1449                                           struct team_gsetter_ctx *ctx)
1450 {
1451         struct team_port *port = ctx->info->port;
1452 
1453         port->user.linkup_enabled = ctx->data.bool_val;
1454         team_refresh_port_linkup(port);
1455         __team_carrier_check(port->team);
1456         return 0;
1457 }
1458 
1459 static int team_priority_option_get(struct team *team,
1460                                     struct team_gsetter_ctx *ctx)
1461 {
1462         struct team_port *port = ctx->info->port;
1463 
1464         ctx->data.s32_val = port->priority;
1465         return 0;
1466 }
1467 
1468 static int team_priority_option_set(struct team *team,
1469                                     struct team_gsetter_ctx *ctx)
1470 {
1471         struct team_port *port = ctx->info->port;
1472         s32 priority = ctx->data.s32_val;
1473 
1474         if (port->priority == priority)
1475                 return 0;
1476         port->priority = priority;
1477         team_queue_override_port_prio_changed(team, port);
1478         return 0;
1479 }
1480 
1481 static int team_queue_id_option_get(struct team *team,
1482                                     struct team_gsetter_ctx *ctx)
1483 {
1484         struct team_port *port = ctx->info->port;
1485 
1486         ctx->data.u32_val = port->queue_id;
1487         return 0;
1488 }
1489 
1490 static int team_queue_id_option_set(struct team *team,
1491                                     struct team_gsetter_ctx *ctx)
1492 {
1493         struct team_port *port = ctx->info->port;
1494         u16 new_queue_id = ctx->data.u32_val;
1495 
1496         if (port->queue_id == new_queue_id)
1497                 return 0;
1498         if (new_queue_id >= team->dev->real_num_tx_queues)
1499                 return -EINVAL;
1500         team_queue_override_port_change_queue_id(team, port, new_queue_id);
1501         return 0;
1502 }
1503 
1504 static const struct team_option team_options[] = {
1505         {
1506                 .name = "mode",
1507                 .type = TEAM_OPTION_TYPE_STRING,
1508                 .getter = team_mode_option_get,
1509                 .setter = team_mode_option_set,
1510         },
1511         {
1512                 .name = "notify_peers_count",
1513                 .type = TEAM_OPTION_TYPE_U32,
1514                 .getter = team_notify_peers_count_get,
1515                 .setter = team_notify_peers_count_set,
1516         },
1517         {
1518                 .name = "notify_peers_interval",
1519                 .type = TEAM_OPTION_TYPE_U32,
1520                 .getter = team_notify_peers_interval_get,
1521                 .setter = team_notify_peers_interval_set,
1522         },
1523         {
1524                 .name = "mcast_rejoin_count",
1525                 .type = TEAM_OPTION_TYPE_U32,
1526                 .getter = team_mcast_rejoin_count_get,
1527                 .setter = team_mcast_rejoin_count_set,
1528         },
1529         {
1530                 .name = "mcast_rejoin_interval",
1531                 .type = TEAM_OPTION_TYPE_U32,
1532                 .getter = team_mcast_rejoin_interval_get,
1533                 .setter = team_mcast_rejoin_interval_set,
1534         },
1535         {
1536                 .name = "enabled",
1537                 .type = TEAM_OPTION_TYPE_BOOL,
1538                 .per_port = true,
1539                 .getter = team_port_en_option_get,
1540                 .setter = team_port_en_option_set,
1541         },
1542         {
1543                 .name = "user_linkup",
1544                 .type = TEAM_OPTION_TYPE_BOOL,
1545                 .per_port = true,
1546                 .getter = team_user_linkup_option_get,
1547                 .setter = team_user_linkup_option_set,
1548         },
1549         {
1550                 .name = "user_linkup_enabled",
1551                 .type = TEAM_OPTION_TYPE_BOOL,
1552                 .per_port = true,
1553                 .getter = team_user_linkup_en_option_get,
1554                 .setter = team_user_linkup_en_option_set,
1555         },
1556         {
1557                 .name = "priority",
1558                 .type = TEAM_OPTION_TYPE_S32,
1559                 .per_port = true,
1560                 .getter = team_priority_option_get,
1561                 .setter = team_priority_option_set,
1562         },
1563         {
1564                 .name = "queue_id",
1565                 .type = TEAM_OPTION_TYPE_U32,
1566                 .per_port = true,
1567                 .getter = team_queue_id_option_get,
1568                 .setter = team_queue_id_option_set,
1569         },
1570 };
1571 
1572 static struct lock_class_key team_netdev_xmit_lock_key;
1573 static struct lock_class_key team_netdev_addr_lock_key;
1574 static struct lock_class_key team_tx_busylock_key;
1575 
1576 static void team_set_lockdep_class_one(struct net_device *dev,
1577                                        struct netdev_queue *txq,
1578                                        void *unused)
1579 {
1580         lockdep_set_class(&txq->_xmit_lock, &team_netdev_xmit_lock_key);
1581 }
1582 
1583 static void team_set_lockdep_class(struct net_device *dev)
1584 {
1585         lockdep_set_class(&dev->addr_list_lock, &team_netdev_addr_lock_key);
1586         netdev_for_each_tx_queue(dev, team_set_lockdep_class_one, NULL);
1587         dev->qdisc_tx_busylock = &team_tx_busylock_key;
1588 }
1589 
1590 static int team_init(struct net_device *dev)
1591 {
1592         struct team *team = netdev_priv(dev);
1593         int i;
1594         int err;
1595 
1596         team->dev = dev;
1597         mutex_init(&team->lock);
1598         team_set_no_mode(team);
1599 
1600         team->pcpu_stats = netdev_alloc_pcpu_stats(struct team_pcpu_stats);
1601         if (!team->pcpu_stats)
1602                 return -ENOMEM;
1603 
1604         for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1605                 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1606         INIT_LIST_HEAD(&team->port_list);
1607         err = team_queue_override_init(team);
1608         if (err)
1609                 goto err_team_queue_override_init;
1610 
1611         team_adjust_ops(team);
1612 
1613         INIT_LIST_HEAD(&team->option_list);
1614         INIT_LIST_HEAD(&team->option_inst_list);
1615 
1616         team_notify_peers_init(team);
1617         team_mcast_rejoin_init(team);
1618 
1619         err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1620         if (err)
1621                 goto err_options_register;
1622         netif_carrier_off(dev);
1623 
1624         team_set_lockdep_class(dev);
1625 
1626         return 0;
1627 
1628 err_options_register:
1629         team_mcast_rejoin_fini(team);
1630         team_notify_peers_fini(team);
1631         team_queue_override_fini(team);
1632 err_team_queue_override_init:
1633         free_percpu(team->pcpu_stats);
1634 
1635         return err;
1636 }
1637 
1638 static void team_uninit(struct net_device *dev)
1639 {
1640         struct team *team = netdev_priv(dev);
1641         struct team_port *port;
1642         struct team_port *tmp;
1643 
1644         mutex_lock(&team->lock);
1645         list_for_each_entry_safe(port, tmp, &team->port_list, list)
1646                 team_port_del(team, port->dev);
1647 
1648         __team_change_mode(team, NULL); /* cleanup */
1649         __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1650         team_mcast_rejoin_fini(team);
1651         team_notify_peers_fini(team);
1652         team_queue_override_fini(team);
1653         mutex_unlock(&team->lock);
1654 }
1655 
1656 static void team_destructor(struct net_device *dev)
1657 {
1658         struct team *team = netdev_priv(dev);
1659 
1660         free_percpu(team->pcpu_stats);
1661         free_netdev(dev);
1662 }
1663 
1664 static int team_open(struct net_device *dev)
1665 {
1666         return 0;
1667 }
1668 
1669 static int team_close(struct net_device *dev)
1670 {
1671         return 0;
1672 }
1673 
1674 /*
1675  * note: already called with rcu_read_lock
1676  */
1677 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1678 {
1679         struct team *team = netdev_priv(dev);
1680         bool tx_success;
1681         unsigned int len = skb->len;
1682 
1683         tx_success = team_queue_override_transmit(team, skb);
1684         if (!tx_success)
1685                 tx_success = team->ops.transmit(team, skb);
1686         if (tx_success) {
1687                 struct team_pcpu_stats *pcpu_stats;
1688 
1689                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1690                 u64_stats_update_begin(&pcpu_stats->syncp);
1691                 pcpu_stats->tx_packets++;
1692                 pcpu_stats->tx_bytes += len;
1693                 u64_stats_update_end(&pcpu_stats->syncp);
1694         } else {
1695                 this_cpu_inc(team->pcpu_stats->tx_dropped);
1696         }
1697 
1698         return NETDEV_TX_OK;
1699 }
1700 
1701 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb,
1702                              void *accel_priv, select_queue_fallback_t fallback)
1703 {
1704         /*
1705          * This helper function exists to help dev_pick_tx get the correct
1706          * destination queue.  Using a helper function skips a call to
1707          * skb_tx_hash and will put the skbs in the queue we expect on their
1708          * way down to the team driver.
1709          */
1710         u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1711 
1712         /*
1713          * Save the original txq to restore before passing to the driver
1714          */
1715         qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1716 
1717         if (unlikely(txq >= dev->real_num_tx_queues)) {
1718                 do {
1719                         txq -= dev->real_num_tx_queues;
1720                 } while (txq >= dev->real_num_tx_queues);
1721         }
1722         return txq;
1723 }
1724 
1725 static void team_change_rx_flags(struct net_device *dev, int change)
1726 {
1727         struct team *team = netdev_priv(dev);
1728         struct team_port *port;
1729         int inc;
1730 
1731         rcu_read_lock();
1732         list_for_each_entry_rcu(port, &team->port_list, list) {
1733                 if (change & IFF_PROMISC) {
1734                         inc = dev->flags & IFF_PROMISC ? 1 : -1;
1735                         dev_set_promiscuity(port->dev, inc);
1736                 }
1737                 if (change & IFF_ALLMULTI) {
1738                         inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1739                         dev_set_allmulti(port->dev, inc);
1740                 }
1741         }
1742         rcu_read_unlock();
1743 }
1744 
1745 static void team_set_rx_mode(struct net_device *dev)
1746 {
1747         struct team *team = netdev_priv(dev);
1748         struct team_port *port;
1749 
1750         rcu_read_lock();
1751         list_for_each_entry_rcu(port, &team->port_list, list) {
1752                 dev_uc_sync_multiple(port->dev, dev);
1753                 dev_mc_sync_multiple(port->dev, dev);
1754         }
1755         rcu_read_unlock();
1756 }
1757 
1758 static int team_set_mac_address(struct net_device *dev, void *p)
1759 {
1760         struct sockaddr *addr = p;
1761         struct team *team = netdev_priv(dev);
1762         struct team_port *port;
1763 
1764         if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1765                 return -EADDRNOTAVAIL;
1766         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1767         mutex_lock(&team->lock);
1768         list_for_each_entry(port, &team->port_list, list)
1769                 if (team->ops.port_change_dev_addr)
1770                         team->ops.port_change_dev_addr(team, port);
1771         mutex_unlock(&team->lock);
1772         return 0;
1773 }
1774 
1775 static int team_change_mtu(struct net_device *dev, int new_mtu)
1776 {
1777         struct team *team = netdev_priv(dev);
1778         struct team_port *port;
1779         int err;
1780 
1781         /*
1782          * Alhough this is reader, it's guarded by team lock. It's not possible
1783          * to traverse list in reverse under rcu_read_lock
1784          */
1785         mutex_lock(&team->lock);
1786         team->port_mtu_change_allowed = true;
1787         list_for_each_entry(port, &team->port_list, list) {
1788                 err = dev_set_mtu(port->dev, new_mtu);
1789                 if (err) {
1790                         netdev_err(dev, "Device %s failed to change mtu",
1791                                    port->dev->name);
1792                         goto unwind;
1793                 }
1794         }
1795         team->port_mtu_change_allowed = false;
1796         mutex_unlock(&team->lock);
1797 
1798         dev->mtu = new_mtu;
1799 
1800         return 0;
1801 
1802 unwind:
1803         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1804                 dev_set_mtu(port->dev, dev->mtu);
1805         team->port_mtu_change_allowed = false;
1806         mutex_unlock(&team->lock);
1807 
1808         return err;
1809 }
1810 
1811 static struct rtnl_link_stats64 *
1812 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1813 {
1814         struct team *team = netdev_priv(dev);
1815         struct team_pcpu_stats *p;
1816         u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1817         u32 rx_dropped = 0, tx_dropped = 0, rx_nohandler = 0;
1818         unsigned int start;
1819         int i;
1820 
1821         for_each_possible_cpu(i) {
1822                 p = per_cpu_ptr(team->pcpu_stats, i);
1823                 do {
1824                         start = u64_stats_fetch_begin_irq(&p->syncp);
1825                         rx_packets      = p->rx_packets;
1826                         rx_bytes        = p->rx_bytes;
1827                         rx_multicast    = p->rx_multicast;
1828                         tx_packets      = p->tx_packets;
1829                         tx_bytes        = p->tx_bytes;
1830                 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
1831 
1832                 stats->rx_packets       += rx_packets;
1833                 stats->rx_bytes         += rx_bytes;
1834                 stats->multicast        += rx_multicast;
1835                 stats->tx_packets       += tx_packets;
1836                 stats->tx_bytes         += tx_bytes;
1837                 /*
1838                  * rx_dropped, tx_dropped & rx_nohandler are u32,
1839                  * updated without syncp protection.
1840                  */
1841                 rx_dropped      += p->rx_dropped;
1842                 tx_dropped      += p->tx_dropped;
1843                 rx_nohandler    += p->rx_nohandler;
1844         }
1845         stats->rx_dropped       = rx_dropped;
1846         stats->tx_dropped       = tx_dropped;
1847         stats->rx_nohandler     = rx_nohandler;
1848         return stats;
1849 }
1850 
1851 static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1852 {
1853         struct team *team = netdev_priv(dev);
1854         struct team_port *port;
1855         int err;
1856 
1857         /*
1858          * Alhough this is reader, it's guarded by team lock. It's not possible
1859          * to traverse list in reverse under rcu_read_lock
1860          */
1861         mutex_lock(&team->lock);
1862         list_for_each_entry(port, &team->port_list, list) {
1863                 err = vlan_vid_add(port->dev, proto, vid);
1864                 if (err)
1865                         goto unwind;
1866         }
1867         mutex_unlock(&team->lock);
1868 
1869         return 0;
1870 
1871 unwind:
1872         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1873                 vlan_vid_del(port->dev, proto, vid);
1874         mutex_unlock(&team->lock);
1875 
1876         return err;
1877 }
1878 
1879 static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1880 {
1881         struct team *team = netdev_priv(dev);
1882         struct team_port *port;
1883 
1884         mutex_lock(&team->lock);
1885         list_for_each_entry(port, &team->port_list, list)
1886                 vlan_vid_del(port->dev, proto, vid);
1887         mutex_unlock(&team->lock);
1888 
1889         return 0;
1890 }
1891 
1892 #ifdef CONFIG_NET_POLL_CONTROLLER
1893 static void team_poll_controller(struct net_device *dev)
1894 {
1895 }
1896 
1897 static void __team_netpoll_cleanup(struct team *team)
1898 {
1899         struct team_port *port;
1900 
1901         list_for_each_entry(port, &team->port_list, list)
1902                 team_port_disable_netpoll(port);
1903 }
1904 
1905 static void team_netpoll_cleanup(struct net_device *dev)
1906 {
1907         struct team *team = netdev_priv(dev);
1908 
1909         mutex_lock(&team->lock);
1910         __team_netpoll_cleanup(team);
1911         mutex_unlock(&team->lock);
1912 }
1913 
1914 static int team_netpoll_setup(struct net_device *dev,
1915                               struct netpoll_info *npifo)
1916 {
1917         struct team *team = netdev_priv(dev);
1918         struct team_port *port;
1919         int err = 0;
1920 
1921         mutex_lock(&team->lock);
1922         list_for_each_entry(port, &team->port_list, list) {
1923                 err = team_port_enable_netpoll(team, port);
1924                 if (err) {
1925                         __team_netpoll_cleanup(team);
1926                         break;
1927                 }
1928         }
1929         mutex_unlock(&team->lock);
1930         return err;
1931 }
1932 #endif
1933 
1934 static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
1935 {
1936         struct team *team = netdev_priv(dev);
1937         int err;
1938 
1939         mutex_lock(&team->lock);
1940         err = team_port_add(team, port_dev);
1941         mutex_unlock(&team->lock);
1942         return err;
1943 }
1944 
1945 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1946 {
1947         struct team *team = netdev_priv(dev);
1948         int err;
1949 
1950         mutex_lock(&team->lock);
1951         err = team_port_del(team, port_dev);
1952         mutex_unlock(&team->lock);
1953         return err;
1954 }
1955 
1956 static netdev_features_t team_fix_features(struct net_device *dev,
1957                                            netdev_features_t features)
1958 {
1959         struct team_port *port;
1960         struct team *team = netdev_priv(dev);
1961         netdev_features_t mask;
1962 
1963         mask = features;
1964         features &= ~NETIF_F_ONE_FOR_ALL;
1965         features |= NETIF_F_ALL_FOR_ALL;
1966 
1967         rcu_read_lock();
1968         list_for_each_entry_rcu(port, &team->port_list, list) {
1969                 features = netdev_increment_features(features,
1970                                                      port->dev->features,
1971                                                      mask);
1972         }
1973         rcu_read_unlock();
1974 
1975         features = netdev_add_tso_features(features, mask);
1976 
1977         return features;
1978 }
1979 
1980 static int team_change_carrier(struct net_device *dev, bool new_carrier)
1981 {
1982         struct team *team = netdev_priv(dev);
1983 
1984         team->user_carrier_enabled = true;
1985 
1986         if (new_carrier)
1987                 netif_carrier_on(dev);
1988         else
1989                 netif_carrier_off(dev);
1990         return 0;
1991 }
1992 
1993 static const struct net_device_ops team_netdev_ops = {
1994         .ndo_init               = team_init,
1995         .ndo_uninit             = team_uninit,
1996         .ndo_open               = team_open,
1997         .ndo_stop               = team_close,
1998         .ndo_start_xmit         = team_xmit,
1999         .ndo_select_queue       = team_select_queue,
2000         .ndo_change_rx_flags    = team_change_rx_flags,
2001         .ndo_set_rx_mode        = team_set_rx_mode,
2002         .ndo_set_mac_address    = team_set_mac_address,
2003         .ndo_change_mtu         = team_change_mtu,
2004         .ndo_get_stats64        = team_get_stats64,
2005         .ndo_vlan_rx_add_vid    = team_vlan_rx_add_vid,
2006         .ndo_vlan_rx_kill_vid   = team_vlan_rx_kill_vid,
2007 #ifdef CONFIG_NET_POLL_CONTROLLER
2008         .ndo_poll_controller    = team_poll_controller,
2009         .ndo_netpoll_setup      = team_netpoll_setup,
2010         .ndo_netpoll_cleanup    = team_netpoll_cleanup,
2011 #endif
2012         .ndo_add_slave          = team_add_slave,
2013         .ndo_del_slave          = team_del_slave,
2014         .ndo_fix_features       = team_fix_features,
2015         .ndo_change_carrier     = team_change_carrier,
2016         .ndo_bridge_setlink     = switchdev_port_bridge_setlink,
2017         .ndo_bridge_getlink     = switchdev_port_bridge_getlink,
2018         .ndo_bridge_dellink     = switchdev_port_bridge_dellink,
2019         .ndo_fdb_add            = switchdev_port_fdb_add,
2020         .ndo_fdb_del            = switchdev_port_fdb_del,
2021         .ndo_fdb_dump           = switchdev_port_fdb_dump,
2022         .ndo_features_check     = passthru_features_check,
2023 };
2024 
2025 /***********************
2026  * ethtool interface
2027  ***********************/
2028 
2029 static void team_ethtool_get_drvinfo(struct net_device *dev,
2030                                      struct ethtool_drvinfo *drvinfo)
2031 {
2032         strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
2033         strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
2034 }
2035 
2036 static const struct ethtool_ops team_ethtool_ops = {
2037         .get_drvinfo            = team_ethtool_get_drvinfo,
2038         .get_link               = ethtool_op_get_link,
2039 };
2040 
2041 /***********************
2042  * rt netlink interface
2043  ***********************/
2044 
2045 static void team_setup_by_port(struct net_device *dev,
2046                                struct net_device *port_dev)
2047 {
2048         dev->header_ops = port_dev->header_ops;
2049         dev->type = port_dev->type;
2050         dev->hard_header_len = port_dev->hard_header_len;
2051         dev->addr_len = port_dev->addr_len;
2052         dev->mtu = port_dev->mtu;
2053         memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
2054         eth_hw_addr_inherit(dev, port_dev);
2055 }
2056 
2057 static int team_dev_type_check_change(struct net_device *dev,
2058                                       struct net_device *port_dev)
2059 {
2060         struct team *team = netdev_priv(dev);
2061         char *portname = port_dev->name;
2062         int err;
2063 
2064         if (dev->type == port_dev->type)
2065                 return 0;
2066         if (!list_empty(&team->port_list)) {
2067                 netdev_err(dev, "Device %s is of different type\n", portname);
2068                 return -EBUSY;
2069         }
2070         err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
2071         err = notifier_to_errno(err);
2072         if (err) {
2073                 netdev_err(dev, "Refused to change device type\n");
2074                 return err;
2075         }
2076         dev_uc_flush(dev);
2077         dev_mc_flush(dev);
2078         team_setup_by_port(dev, port_dev);
2079         call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
2080         return 0;
2081 }
2082 
2083 static void team_setup(struct net_device *dev)
2084 {
2085         ether_setup(dev);
2086 
2087         dev->netdev_ops = &team_netdev_ops;
2088         dev->ethtool_ops = &team_ethtool_ops;
2089         dev->destructor = team_destructor;
2090         dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
2091         dev->priv_flags |= IFF_NO_QUEUE;
2092         dev->priv_flags |= IFF_TEAM;
2093 
2094         /*
2095          * Indicate we support unicast address filtering. That way core won't
2096          * bring us to promisc mode in case a unicast addr is added.
2097          * Let this up to underlay drivers.
2098          */
2099         dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
2100 
2101         dev->features |= NETIF_F_LLTX;
2102         dev->features |= NETIF_F_GRO;
2103 
2104         /* Don't allow team devices to change network namespaces. */
2105         dev->features |= NETIF_F_NETNS_LOCAL;
2106 
2107         dev->hw_features = TEAM_VLAN_FEATURES |
2108                            NETIF_F_HW_VLAN_CTAG_TX |
2109                            NETIF_F_HW_VLAN_CTAG_RX |
2110                            NETIF_F_HW_VLAN_CTAG_FILTER;
2111 
2112         dev->hw_features |= NETIF_F_GSO_ENCAP_ALL;
2113         dev->features |= dev->hw_features;
2114 }
2115 
2116 static int team_newlink(struct net *src_net, struct net_device *dev,
2117                         struct nlattr *tb[], struct nlattr *data[])
2118 {
2119         if (tb[IFLA_ADDRESS] == NULL)
2120                 eth_hw_addr_random(dev);
2121 
2122         return register_netdevice(dev);
2123 }
2124 
2125 static int team_validate(struct nlattr *tb[], struct nlattr *data[])
2126 {
2127         if (tb[IFLA_ADDRESS]) {
2128                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
2129                         return -EINVAL;
2130                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
2131                         return -EADDRNOTAVAIL;
2132         }
2133         return 0;
2134 }
2135 
2136 static unsigned int team_get_num_tx_queues(void)
2137 {
2138         return TEAM_DEFAULT_NUM_TX_QUEUES;
2139 }
2140 
2141 static unsigned int team_get_num_rx_queues(void)
2142 {
2143         return TEAM_DEFAULT_NUM_RX_QUEUES;
2144 }
2145 
2146 static struct rtnl_link_ops team_link_ops __read_mostly = {
2147         .kind                   = DRV_NAME,
2148         .priv_size              = sizeof(struct team),
2149         .setup                  = team_setup,
2150         .newlink                = team_newlink,
2151         .validate               = team_validate,
2152         .get_num_tx_queues      = team_get_num_tx_queues,
2153         .get_num_rx_queues      = team_get_num_rx_queues,
2154 };
2155 
2156 
2157 /***********************************
2158  * Generic netlink custom interface
2159  ***********************************/
2160 
2161 static struct genl_family team_nl_family = {
2162         .id             = GENL_ID_GENERATE,
2163         .name           = TEAM_GENL_NAME,
2164         .version        = TEAM_GENL_VERSION,
2165         .maxattr        = TEAM_ATTR_MAX,
2166         .netnsok        = true,
2167 };
2168 
2169 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
2170         [TEAM_ATTR_UNSPEC]                      = { .type = NLA_UNSPEC, },
2171         [TEAM_ATTR_TEAM_IFINDEX]                = { .type = NLA_U32 },
2172         [TEAM_ATTR_LIST_OPTION]                 = { .type = NLA_NESTED },
2173         [TEAM_ATTR_LIST_PORT]                   = { .type = NLA_NESTED },
2174 };
2175 
2176 static const struct nla_policy
2177 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
2178         [TEAM_ATTR_OPTION_UNSPEC]               = { .type = NLA_UNSPEC, },
2179         [TEAM_ATTR_OPTION_NAME] = {
2180                 .type = NLA_STRING,
2181                 .len = TEAM_STRING_MAX_LEN,
2182         },
2183         [TEAM_ATTR_OPTION_CHANGED]              = { .type = NLA_FLAG },
2184         [TEAM_ATTR_OPTION_TYPE]                 = { .type = NLA_U8 },
2185         [TEAM_ATTR_OPTION_DATA]                 = { .type = NLA_BINARY },
2186 };
2187 
2188 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
2189 {
2190         struct sk_buff *msg;
2191         void *hdr;
2192         int err;
2193 
2194         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2195         if (!msg)
2196                 return -ENOMEM;
2197 
2198         hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
2199                           &team_nl_family, 0, TEAM_CMD_NOOP);
2200         if (!hdr) {
2201                 err = -EMSGSIZE;
2202                 goto err_msg_put;
2203         }
2204 
2205         genlmsg_end(msg, hdr);
2206 
2207         return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
2208 
2209 err_msg_put:
2210         nlmsg_free(msg);
2211 
2212         return err;
2213 }
2214 
2215 /*
2216  * Netlink cmd functions should be locked by following two functions.
2217  * Since dev gets held here, that ensures dev won't disappear in between.
2218  */
2219 static struct team *team_nl_team_get(struct genl_info *info)
2220 {
2221         struct net *net = genl_info_net(info);
2222         int ifindex;
2223         struct net_device *dev;
2224         struct team *team;
2225 
2226         if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
2227                 return NULL;
2228 
2229         ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
2230         dev = dev_get_by_index(net, ifindex);
2231         if (!dev || dev->netdev_ops != &team_netdev_ops) {
2232                 if (dev)
2233                         dev_put(dev);
2234                 return NULL;
2235         }
2236 
2237         team = netdev_priv(dev);
2238         mutex_lock(&team->lock);
2239         return team;
2240 }
2241 
2242 static void team_nl_team_put(struct team *team)
2243 {
2244         mutex_unlock(&team->lock);
2245         dev_put(team->dev);
2246 }
2247 
2248 typedef int team_nl_send_func_t(struct sk_buff *skb,
2249                                 struct team *team, u32 portid);
2250 
2251 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
2252 {
2253         return genlmsg_unicast(dev_net(team->dev), skb, portid);
2254 }
2255 
2256 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2257                                        struct team_option_inst *opt_inst)
2258 {
2259         struct nlattr *option_item;
2260         struct team_option *option = opt_inst->option;
2261         struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2262         struct team_gsetter_ctx ctx;
2263         int err;
2264 
2265         ctx.info = opt_inst_info;
2266         err = team_option_get(team, opt_inst, &ctx);
2267         if (err)
2268                 return err;
2269 
2270         option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
2271         if (!option_item)
2272                 return -EMSGSIZE;
2273 
2274         if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2275                 goto nest_cancel;
2276         if (opt_inst_info->port &&
2277             nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2278                         opt_inst_info->port->dev->ifindex))
2279                 goto nest_cancel;
2280         if (opt_inst->option->array_size &&
2281             nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2282                         opt_inst_info->array_index))
2283                 goto nest_cancel;
2284 
2285         switch (option->type) {
2286         case TEAM_OPTION_TYPE_U32:
2287                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2288                         goto nest_cancel;
2289                 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2290                         goto nest_cancel;
2291                 break;
2292         case TEAM_OPTION_TYPE_STRING:
2293                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2294                         goto nest_cancel;
2295                 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2296                                    ctx.data.str_val))
2297                         goto nest_cancel;
2298                 break;
2299         case TEAM_OPTION_TYPE_BINARY:
2300                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2301                         goto nest_cancel;
2302                 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2303                             ctx.data.bin_val.ptr))
2304                         goto nest_cancel;
2305                 break;
2306         case TEAM_OPTION_TYPE_BOOL:
2307                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2308                         goto nest_cancel;
2309                 if (ctx.data.bool_val &&
2310                     nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2311                         goto nest_cancel;
2312                 break;
2313         case TEAM_OPTION_TYPE_S32:
2314                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2315                         goto nest_cancel;
2316                 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2317                         goto nest_cancel;
2318                 break;
2319         default:
2320                 BUG();
2321         }
2322         if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2323                 goto nest_cancel;
2324         if (opt_inst->changed) {
2325                 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2326                         goto nest_cancel;
2327                 opt_inst->changed = false;
2328         }
2329         nla_nest_end(skb, option_item);
2330         return 0;
2331 
2332 nest_cancel:
2333         nla_nest_cancel(skb, option_item);
2334         return -EMSGSIZE;
2335 }
2336 
2337 static int __send_and_alloc_skb(struct sk_buff **pskb,
2338                                 struct team *team, u32 portid,
2339                                 team_nl_send_func_t *send_func)
2340 {
2341         int err;
2342 
2343         if (*pskb) {
2344                 err = send_func(*pskb, team, portid);
2345                 if (err)
2346                         return err;
2347         }
2348         *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2349         if (!*pskb)
2350                 return -ENOMEM;
2351         return 0;
2352 }
2353 
2354 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2355                                     int flags, team_nl_send_func_t *send_func,
2356                                     struct list_head *sel_opt_inst_list)
2357 {
2358         struct nlattr *option_list;
2359         struct nlmsghdr *nlh;
2360         void *hdr;
2361         struct team_option_inst *opt_inst;
2362         int err;
2363         struct sk_buff *skb = NULL;
2364         bool incomplete;
2365         int i;
2366 
2367         opt_inst = list_first_entry(sel_opt_inst_list,
2368                                     struct team_option_inst, tmp_list);
2369 
2370 start_again:
2371         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2372         if (err)
2373                 return err;
2374 
2375         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2376                           TEAM_CMD_OPTIONS_GET);
2377         if (!hdr)
2378                 return -EMSGSIZE;
2379 
2380         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2381                 goto nla_put_failure;
2382         option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2383         if (!option_list)
2384                 goto nla_put_failure;
2385 
2386         i = 0;
2387         incomplete = false;
2388         list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2389                 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2390                 if (err) {
2391                         if (err == -EMSGSIZE) {
2392                                 if (!i)
2393                                         goto errout;
2394                                 incomplete = true;
2395                                 break;
2396                         }
2397                         goto errout;
2398                 }
2399                 i++;
2400         }
2401 
2402         nla_nest_end(skb, option_list);
2403         genlmsg_end(skb, hdr);
2404         if (incomplete)
2405                 goto start_again;
2406 
2407 send_done:
2408         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2409         if (!nlh) {
2410                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2411                 if (err)
2412                         goto errout;
2413                 goto send_done;
2414         }
2415 
2416         return send_func(skb, team, portid);
2417 
2418 nla_put_failure:
2419         err = -EMSGSIZE;
2420 errout:
2421         genlmsg_cancel(skb, hdr);
2422         nlmsg_free(skb);
2423         return err;
2424 }
2425 
2426 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2427 {
2428         struct team *team;
2429         struct team_option_inst *opt_inst;
2430         int err;
2431         LIST_HEAD(sel_opt_inst_list);
2432 
2433         team = team_nl_team_get(info);
2434         if (!team)
2435                 return -EINVAL;
2436 
2437         list_for_each_entry(opt_inst, &team->option_inst_list, list)
2438                 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2439         err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2440                                        NLM_F_ACK, team_nl_send_unicast,
2441                                        &sel_opt_inst_list);
2442 
2443         team_nl_team_put(team);
2444 
2445         return err;
2446 }
2447 
2448 static int team_nl_send_event_options_get(struct team *team,
2449                                           struct list_head *sel_opt_inst_list);
2450 
2451 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2452 {
2453         struct team *team;
2454         int err = 0;
2455         int i;
2456         struct nlattr *nl_option;
2457         LIST_HEAD(opt_inst_list);
2458 
2459         rtnl_lock();
2460 
2461         team = team_nl_team_get(info);
2462         if (!team) {
2463                 err = -EINVAL;
2464                 goto rtnl_unlock;
2465         }
2466 
2467         err = -EINVAL;
2468         if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2469                 err = -EINVAL;
2470                 goto team_put;
2471         }
2472 
2473         nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2474                 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2475                 struct nlattr *attr;
2476                 struct nlattr *attr_data;
2477                 enum team_option_type opt_type;
2478                 int opt_port_ifindex = 0; /* != 0 for per-port options */
2479                 u32 opt_array_index = 0;
2480                 bool opt_is_array = false;
2481                 struct team_option_inst *opt_inst;
2482                 char *opt_name;
2483                 bool opt_found = false;
2484 
2485                 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2486                         err = -EINVAL;
2487                         goto team_put;
2488                 }
2489                 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2490                                        nl_option, team_nl_option_policy);
2491                 if (err)
2492                         goto team_put;
2493                 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2494                     !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2495                         err = -EINVAL;
2496                         goto team_put;
2497                 }
2498                 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2499                 case NLA_U32:
2500                         opt_type = TEAM_OPTION_TYPE_U32;
2501                         break;
2502                 case NLA_STRING:
2503                         opt_type = TEAM_OPTION_TYPE_STRING;
2504                         break;
2505                 case NLA_BINARY:
2506                         opt_type = TEAM_OPTION_TYPE_BINARY;
2507                         break;
2508                 case NLA_FLAG:
2509                         opt_type = TEAM_OPTION_TYPE_BOOL;
2510                         break;
2511                 case NLA_S32:
2512                         opt_type = TEAM_OPTION_TYPE_S32;
2513                         break;
2514                 default:
2515                         goto team_put;
2516                 }
2517 
2518                 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2519                 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2520                         err = -EINVAL;
2521                         goto team_put;
2522                 }
2523 
2524                 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2525                 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2526                 if (attr)
2527                         opt_port_ifindex = nla_get_u32(attr);
2528 
2529                 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2530                 if (attr) {
2531                         opt_is_array = true;
2532                         opt_array_index = nla_get_u32(attr);
2533                 }
2534 
2535                 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2536                         struct team_option *option = opt_inst->option;
2537                         struct team_gsetter_ctx ctx;
2538                         struct team_option_inst_info *opt_inst_info;
2539                         int tmp_ifindex;
2540 
2541                         opt_inst_info = &opt_inst->info;
2542                         tmp_ifindex = opt_inst_info->port ?
2543                                       opt_inst_info->port->dev->ifindex : 0;
2544                         if (option->type != opt_type ||
2545                             strcmp(option->name, opt_name) ||
2546                             tmp_ifindex != opt_port_ifindex ||
2547                             (option->array_size && !opt_is_array) ||
2548                             opt_inst_info->array_index != opt_array_index)
2549                                 continue;
2550                         opt_found = true;
2551                         ctx.info = opt_inst_info;
2552                         switch (opt_type) {
2553                         case TEAM_OPTION_TYPE_U32:
2554                                 ctx.data.u32_val = nla_get_u32(attr_data);
2555                                 break;
2556                         case TEAM_OPTION_TYPE_STRING:
2557                                 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2558                                         err = -EINVAL;
2559                                         goto team_put;
2560                                 }
2561                                 ctx.data.str_val = nla_data(attr_data);
2562                                 break;
2563                         case TEAM_OPTION_TYPE_BINARY:
2564                                 ctx.data.bin_val.len = nla_len(attr_data);
2565                                 ctx.data.bin_val.ptr = nla_data(attr_data);
2566                                 break;
2567                         case TEAM_OPTION_TYPE_BOOL:
2568                                 ctx.data.bool_val = attr_data ? true : false;
2569                                 break;
2570                         case TEAM_OPTION_TYPE_S32:
2571                                 ctx.data.s32_val = nla_get_s32(attr_data);
2572                                 break;
2573                         default:
2574                                 BUG();
2575                         }
2576                         err = team_option_set(team, opt_inst, &ctx);
2577                         if (err)
2578                                 goto team_put;
2579                         opt_inst->changed = true;
2580                         list_add(&opt_inst->tmp_list, &opt_inst_list);
2581                 }
2582                 if (!opt_found) {
2583                         err = -ENOENT;
2584                         goto team_put;
2585                 }
2586         }
2587 
2588         err = team_nl_send_event_options_get(team, &opt_inst_list);
2589 
2590 team_put:
2591         team_nl_team_put(team);
2592 rtnl_unlock:
2593         rtnl_unlock();
2594         return err;
2595 }
2596 
2597 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2598                                      struct team_port *port)
2599 {
2600         struct nlattr *port_item;
2601 
2602         port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2603         if (!port_item)
2604                 goto nest_cancel;
2605         if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2606                 goto nest_cancel;
2607         if (port->changed) {
2608                 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2609                         goto nest_cancel;
2610                 port->changed = false;
2611         }
2612         if ((port->removed &&
2613              nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2614             (port->state.linkup &&
2615              nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2616             nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2617             nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2618                 goto nest_cancel;
2619         nla_nest_end(skb, port_item);
2620         return 0;
2621 
2622 nest_cancel:
2623         nla_nest_cancel(skb, port_item);
2624         return -EMSGSIZE;
2625 }
2626 
2627 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2628                                       int flags, team_nl_send_func_t *send_func,
2629                                       struct team_port *one_port)
2630 {
2631         struct nlattr *port_list;
2632         struct nlmsghdr *nlh;
2633         void *hdr;
2634         struct team_port *port;
2635         int err;
2636         struct sk_buff *skb = NULL;
2637         bool incomplete;
2638         int i;
2639 
2640         port = list_first_entry_or_null(&team->port_list,
2641                                         struct team_port, list);
2642 
2643 start_again:
2644         err = __send_and_alloc_skb(&skb, team, portid, send_func);
2645         if (err)
2646                 return err;
2647 
2648         hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2649                           TEAM_CMD_PORT_LIST_GET);
2650         if (!hdr)
2651                 return -EMSGSIZE;
2652 
2653         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2654                 goto nla_put_failure;
2655         port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2656         if (!port_list)
2657                 goto nla_put_failure;
2658 
2659         i = 0;
2660         incomplete = false;
2661 
2662         /* If one port is selected, called wants to send port list containing
2663          * only this port. Otherwise go through all listed ports and send all
2664          */
2665         if (one_port) {
2666                 err = team_nl_fill_one_port_get(skb, one_port);
2667                 if (err)
2668                         goto errout;
2669         } else if (port) {
2670                 list_for_each_entry_from(port, &team->port_list, list) {
2671                         err = team_nl_fill_one_port_get(skb, port);
2672                         if (err) {
2673                                 if (err == -EMSGSIZE) {
2674                                         if (!i)
2675                                                 goto errout;
2676                                         incomplete = true;
2677                                         break;
2678                                 }
2679                                 goto errout;
2680                         }
2681                         i++;
2682                 }
2683         }
2684 
2685         nla_nest_end(skb, port_list);
2686         genlmsg_end(skb, hdr);
2687         if (incomplete)
2688                 goto start_again;
2689 
2690 send_done:
2691         nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2692         if (!nlh) {
2693                 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2694                 if (err)
2695                         goto errout;
2696                 goto send_done;
2697         }
2698 
2699         return send_func(skb, team, portid);
2700 
2701 nla_put_failure:
2702         err = -EMSGSIZE;
2703 errout:
2704         genlmsg_cancel(skb, hdr);
2705         nlmsg_free(skb);
2706         return err;
2707 }
2708 
2709 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2710                                      struct genl_info *info)
2711 {
2712         struct team *team;
2713         int err;
2714 
2715         team = team_nl_team_get(info);
2716         if (!team)
2717                 return -EINVAL;
2718 
2719         err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2720                                          NLM_F_ACK, team_nl_send_unicast, NULL);
2721 
2722         team_nl_team_put(team);
2723 
2724         return err;
2725 }
2726 
2727 static const struct genl_ops team_nl_ops[] = {
2728         {
2729                 .cmd = TEAM_CMD_NOOP,
2730                 .doit = team_nl_cmd_noop,
2731                 .policy = team_nl_policy,
2732         },
2733         {
2734                 .cmd = TEAM_CMD_OPTIONS_SET,
2735                 .doit = team_nl_cmd_options_set,
2736                 .policy = team_nl_policy,
2737                 .flags = GENL_ADMIN_PERM,
2738         },
2739         {
2740                 .cmd = TEAM_CMD_OPTIONS_GET,
2741                 .doit = team_nl_cmd_options_get,
2742                 .policy = team_nl_policy,
2743                 .flags = GENL_ADMIN_PERM,
2744         },
2745         {
2746                 .cmd = TEAM_CMD_PORT_LIST_GET,
2747                 .doit = team_nl_cmd_port_list_get,
2748                 .policy = team_nl_policy,
2749                 .flags = GENL_ADMIN_PERM,
2750         },
2751 };
2752 
2753 static const struct genl_multicast_group team_nl_mcgrps[] = {
2754         { .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME, },
2755 };
2756 
2757 static int team_nl_send_multicast(struct sk_buff *skb,
2758                                   struct team *team, u32 portid)
2759 {
2760         return genlmsg_multicast_netns(&team_nl_family, dev_net(team->dev),
2761                                        skb, 0, 0, GFP_KERNEL);
2762 }
2763 
2764 static int team_nl_send_event_options_get(struct team *team,
2765                                           struct list_head *sel_opt_inst_list)
2766 {
2767         return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2768                                         sel_opt_inst_list);
2769 }
2770 
2771 static int team_nl_send_event_port_get(struct team *team,
2772                                        struct team_port *port)
2773 {
2774         return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2775                                           port);
2776 }
2777 
2778 static int team_nl_init(void)
2779 {
2780         return genl_register_family_with_ops_groups(&team_nl_family, team_nl_ops,
2781                                                     team_nl_mcgrps);
2782 }
2783 
2784 static void team_nl_fini(void)
2785 {
2786         genl_unregister_family(&team_nl_family);
2787 }
2788 
2789 
2790 /******************
2791  * Change checkers
2792  ******************/
2793 
2794 static void __team_options_change_check(struct team *team)
2795 {
2796         int err;
2797         struct team_option_inst *opt_inst;
2798         LIST_HEAD(sel_opt_inst_list);
2799 
2800         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2801                 if (opt_inst->changed)
2802                         list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2803         }
2804         err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2805         if (err && err != -ESRCH)
2806                 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2807                             err);
2808 }
2809 
2810 /* rtnl lock is held */
2811 
2812 static void __team_port_change_send(struct team_port *port, bool linkup)
2813 {
2814         int err;
2815 
2816         port->changed = true;
2817         port->state.linkup = linkup;
2818         team_refresh_port_linkup(port);
2819         if (linkup) {
2820                 struct ethtool_link_ksettings ecmd;
2821 
2822                 err = __ethtool_get_link_ksettings(port->dev, &ecmd);
2823                 if (!err) {
2824                         port->state.speed = ecmd.base.speed;
2825                         port->state.duplex = ecmd.base.duplex;
2826                         goto send_event;
2827                 }
2828         }
2829         port->state.speed = 0;
2830         port->state.duplex = 0;
2831 
2832 send_event:
2833         err = team_nl_send_event_port_get(port->team, port);
2834         if (err && err != -ESRCH)
2835                 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2836                             port->dev->name, err);
2837 
2838 }
2839 
2840 static void __team_carrier_check(struct team *team)
2841 {
2842         struct team_port *port;
2843         bool team_linkup;
2844 
2845         if (team->user_carrier_enabled)
2846                 return;
2847 
2848         team_linkup = false;
2849         list_for_each_entry(port, &team->port_list, list) {
2850                 if (port->linkup) {
2851                         team_linkup = true;
2852                         break;
2853                 }
2854         }
2855 
2856         if (team_linkup)
2857                 netif_carrier_on(team->dev);
2858         else
2859                 netif_carrier_off(team->dev);
2860 }
2861 
2862 static void __team_port_change_check(struct team_port *port, bool linkup)
2863 {
2864         if (port->state.linkup != linkup)
2865                 __team_port_change_send(port, linkup);
2866         __team_carrier_check(port->team);
2867 }
2868 
2869 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2870 {
2871         __team_port_change_send(port, linkup);
2872         __team_carrier_check(port->team);
2873 }
2874 
2875 static void __team_port_change_port_removed(struct team_port *port)
2876 {
2877         port->removed = true;
2878         __team_port_change_send(port, false);
2879         __team_carrier_check(port->team);
2880 }
2881 
2882 static void team_port_change_check(struct team_port *port, bool linkup)
2883 {
2884         struct team *team = port->team;
2885 
2886         mutex_lock(&team->lock);
2887         __team_port_change_check(port, linkup);
2888         mutex_unlock(&team->lock);
2889 }
2890 
2891 
2892 /************************************
2893  * Net device notifier event handler
2894  ************************************/
2895 
2896 static int team_device_event(struct notifier_block *unused,
2897                              unsigned long event, void *ptr)
2898 {
2899         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2900         struct team_port *port;
2901 
2902         port = team_port_get_rtnl(dev);
2903         if (!port)
2904                 return NOTIFY_DONE;
2905 
2906         switch (event) {
2907         case NETDEV_UP:
2908                 if (netif_carrier_ok(dev))
2909                         team_port_change_check(port, true);
2910                 break;
2911         case NETDEV_DOWN:
2912                 team_port_change_check(port, false);
2913                 break;
2914         case NETDEV_CHANGE:
2915                 if (netif_running(port->dev))
2916                         team_port_change_check(port,
2917                                                !!netif_carrier_ok(port->dev));
2918                 break;
2919         case NETDEV_UNREGISTER:
2920                 team_del_slave(port->team->dev, dev);
2921                 break;
2922         case NETDEV_FEAT_CHANGE:
2923                 team_compute_features(port->team);
2924                 break;
2925         case NETDEV_PRECHANGEMTU:
2926                 /* Forbid to change mtu of underlaying device */
2927                 if (!port->team->port_mtu_change_allowed)
2928                         return NOTIFY_BAD;
2929                 break;
2930         case NETDEV_PRE_TYPE_CHANGE:
2931                 /* Forbid to change type of underlaying device */
2932                 return NOTIFY_BAD;
2933         case NETDEV_RESEND_IGMP:
2934                 /* Propagate to master device */
2935                 call_netdevice_notifiers(event, port->team->dev);
2936                 break;
2937         }
2938         return NOTIFY_DONE;
2939 }
2940 
2941 static struct notifier_block team_notifier_block __read_mostly = {
2942         .notifier_call = team_device_event,
2943 };
2944 
2945 
2946 /***********************
2947  * Module init and exit
2948  ***********************/
2949 
2950 static int __init team_module_init(void)
2951 {
2952         int err;
2953 
2954         register_netdevice_notifier(&team_notifier_block);
2955 
2956         err = rtnl_link_register(&team_link_ops);
2957         if (err)
2958                 goto err_rtnl_reg;
2959 
2960         err = team_nl_init();
2961         if (err)
2962                 goto err_nl_init;
2963 
2964         return 0;
2965 
2966 err_nl_init:
2967         rtnl_link_unregister(&team_link_ops);
2968 
2969 err_rtnl_reg:
2970         unregister_netdevice_notifier(&team_notifier_block);
2971 
2972         return err;
2973 }
2974 
2975 static void __exit team_module_exit(void)
2976 {
2977         team_nl_fini();
2978         rtnl_link_unregister(&team_link_ops);
2979         unregister_netdevice_notifier(&team_notifier_block);
2980 }
2981 
2982 module_init(team_module_init);
2983 module_exit(team_module_exit);
2984 
2985 MODULE_LICENSE("GPL v2");
2986 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
2987 MODULE_DESCRIPTION("Ethernet team device driver");
2988 MODULE_ALIAS_RTNL_LINK(DRV_NAME);
2989 

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