87707ab3943084821e1b7e5c5b9a201d51a944ba
[linux-3.10.git] / drivers / net / team / team.c
1 /*
2  * drivers/net/team/team.c - Network team device driver
3  * Copyright (c) 2011 Jiri Pirko <jpirko@redhat.com>
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License as published by
7  * the Free Software Foundation; either version 2 of the License, or
8  * (at your option) any later version.
9  */
10
11 #include <linux/kernel.h>
12 #include <linux/types.h>
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/slab.h>
16 #include <linux/rcupdate.h>
17 #include <linux/errno.h>
18 #include <linux/ctype.h>
19 #include <linux/notifier.h>
20 #include <linux/netdevice.h>
21 #include <linux/netpoll.h>
22 #include <linux/if_vlan.h>
23 #include <linux/if_arp.h>
24 #include <linux/socket.h>
25 #include <linux/etherdevice.h>
26 #include <linux/rtnetlink.h>
27 #include <net/rtnetlink.h>
28 #include <net/genetlink.h>
29 #include <net/netlink.h>
30 #include <net/sch_generic.h>
31 #include <linux/if_team.h>
32
33 #define DRV_NAME "team"
34
35
36 /**********
37  * Helpers
38  **********/
39
40 #define team_port_exists(dev) (dev->priv_flags & IFF_TEAM_PORT)
41
42 static struct team_port *team_port_get_rcu(const struct net_device *dev)
43 {
44         struct team_port *port = rcu_dereference(dev->rx_handler_data);
45
46         return team_port_exists(dev) ? port : NULL;
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 mac 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_mac(struct net_device *port_dev,
61                           const unsigned char *dev_addr)
62 {
63         struct sockaddr addr;
64
65         memcpy(addr.sa_data, dev_addr, ETH_ALEN);
66         addr.sa_family = ARPHRD_ETHER;
67         return dev_set_mac_address(port_dev, &addr);
68 }
69
70 static int team_port_set_orig_mac(struct team_port *port)
71 {
72         return __set_port_mac(port->dev, port->orig.dev_addr);
73 }
74
75 int team_port_set_team_mac(struct team_port *port)
76 {
77         return __set_port_mac(port->dev, port->team->dev->dev_addr);
78 }
79 EXPORT_SYMBOL(team_port_set_team_mac);
80
81 static void team_refresh_port_linkup(struct team_port *port)
82 {
83         port->linkup = port->user.linkup_enabled ? port->user.linkup :
84                                                    port->state.linkup;
85 }
86
87
88 /*******************
89  * Options handling
90  *******************/
91
92 struct team_option_inst { /* One for each option instance */
93         struct list_head list;
94         struct list_head tmp_list;
95         struct team_option *option;
96         struct team_option_inst_info info;
97         bool changed;
98         bool removed;
99 };
100
101 static struct team_option *__team_find_option(struct team *team,
102                                               const char *opt_name)
103 {
104         struct team_option *option;
105
106         list_for_each_entry(option, &team->option_list, list) {
107                 if (strcmp(option->name, opt_name) == 0)
108                         return option;
109         }
110         return NULL;
111 }
112
113 static void __team_option_inst_del(struct team_option_inst *opt_inst)
114 {
115         list_del(&opt_inst->list);
116         kfree(opt_inst);
117 }
118
119 static void __team_option_inst_del_option(struct team *team,
120                                           struct team_option *option)
121 {
122         struct team_option_inst *opt_inst, *tmp;
123
124         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
125                 if (opt_inst->option == option)
126                         __team_option_inst_del(opt_inst);
127         }
128 }
129
130 static int __team_option_inst_add(struct team *team, struct team_option *option,
131                                   struct team_port *port)
132 {
133         struct team_option_inst *opt_inst;
134         unsigned int array_size;
135         unsigned int i;
136         int err;
137
138         array_size = option->array_size;
139         if (!array_size)
140                 array_size = 1; /* No array but still need one instance */
141
142         for (i = 0; i < array_size; i++) {
143                 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL);
144                 if (!opt_inst)
145                         return -ENOMEM;
146                 opt_inst->option = option;
147                 opt_inst->info.port = port;
148                 opt_inst->info.array_index = i;
149                 opt_inst->changed = true;
150                 opt_inst->removed = false;
151                 list_add_tail(&opt_inst->list, &team->option_inst_list);
152                 if (option->init) {
153                         err = option->init(team, &opt_inst->info);
154                         if (err)
155                                 return err;
156                 }
157
158         }
159         return 0;
160 }
161
162 static int __team_option_inst_add_option(struct team *team,
163                                          struct team_option *option)
164 {
165         struct team_port *port;
166         int err;
167
168         if (!option->per_port) {
169                 err = __team_option_inst_add(team, option, NULL);
170                 if (err)
171                         goto inst_del_option;
172         }
173
174         list_for_each_entry(port, &team->port_list, list) {
175                 err = __team_option_inst_add(team, option, port);
176                 if (err)
177                         goto inst_del_option;
178         }
179         return 0;
180
181 inst_del_option:
182         __team_option_inst_del_option(team, option);
183         return err;
184 }
185
186 static void __team_option_inst_mark_removed_option(struct team *team,
187                                                    struct team_option *option)
188 {
189         struct team_option_inst *opt_inst;
190
191         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
192                 if (opt_inst->option == option) {
193                         opt_inst->changed = true;
194                         opt_inst->removed = true;
195                 }
196         }
197 }
198
199 static void __team_option_inst_del_port(struct team *team,
200                                         struct team_port *port)
201 {
202         struct team_option_inst *opt_inst, *tmp;
203
204         list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
205                 if (opt_inst->option->per_port &&
206                     opt_inst->info.port == port)
207                         __team_option_inst_del(opt_inst);
208         }
209 }
210
211 static int __team_option_inst_add_port(struct team *team,
212                                        struct team_port *port)
213 {
214         struct team_option *option;
215         int err;
216
217         list_for_each_entry(option, &team->option_list, list) {
218                 if (!option->per_port)
219                         continue;
220                 err = __team_option_inst_add(team, option, port);
221                 if (err)
222                         goto inst_del_port;
223         }
224         return 0;
225
226 inst_del_port:
227         __team_option_inst_del_port(team, port);
228         return err;
229 }
230
231 static void __team_option_inst_mark_removed_port(struct team *team,
232                                                  struct team_port *port)
233 {
234         struct team_option_inst *opt_inst;
235
236         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
237                 if (opt_inst->info.port == port) {
238                         opt_inst->changed = true;
239                         opt_inst->removed = true;
240                 }
241         }
242 }
243
244 static int __team_options_register(struct team *team,
245                                    const struct team_option *option,
246                                    size_t option_count)
247 {
248         int i;
249         struct team_option **dst_opts;
250         int err;
251
252         dst_opts = kzalloc(sizeof(struct team_option *) * option_count,
253                            GFP_KERNEL);
254         if (!dst_opts)
255                 return -ENOMEM;
256         for (i = 0; i < option_count; i++, option++) {
257                 if (__team_find_option(team, option->name)) {
258                         err = -EEXIST;
259                         goto alloc_rollback;
260                 }
261                 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
262                 if (!dst_opts[i]) {
263                         err = -ENOMEM;
264                         goto alloc_rollback;
265                 }
266         }
267
268         for (i = 0; i < option_count; i++) {
269                 err = __team_option_inst_add_option(team, dst_opts[i]);
270                 if (err)
271                         goto inst_rollback;
272                 list_add_tail(&dst_opts[i]->list, &team->option_list);
273         }
274
275         kfree(dst_opts);
276         return 0;
277
278 inst_rollback:
279         for (i--; i >= 0; i--)
280                 __team_option_inst_del_option(team, dst_opts[i]);
281
282         i = option_count - 1;
283 alloc_rollback:
284         for (i--; i >= 0; i--)
285                 kfree(dst_opts[i]);
286
287         kfree(dst_opts);
288         return err;
289 }
290
291 static void __team_options_mark_removed(struct team *team,
292                                         const struct team_option *option,
293                                         size_t option_count)
294 {
295         int i;
296
297         for (i = 0; i < option_count; i++, option++) {
298                 struct team_option *del_opt;
299
300                 del_opt = __team_find_option(team, option->name);
301                 if (del_opt)
302                         __team_option_inst_mark_removed_option(team, del_opt);
303         }
304 }
305
306 static void __team_options_unregister(struct team *team,
307                                       const struct team_option *option,
308                                       size_t option_count)
309 {
310         int i;
311
312         for (i = 0; i < option_count; i++, option++) {
313                 struct team_option *del_opt;
314
315                 del_opt = __team_find_option(team, option->name);
316                 if (del_opt) {
317                         __team_option_inst_del_option(team, del_opt);
318                         list_del(&del_opt->list);
319                         kfree(del_opt);
320                 }
321         }
322 }
323
324 static void __team_options_change_check(struct team *team);
325
326 int team_options_register(struct team *team,
327                           const struct team_option *option,
328                           size_t option_count)
329 {
330         int err;
331
332         err = __team_options_register(team, option, option_count);
333         if (err)
334                 return err;
335         __team_options_change_check(team);
336         return 0;
337 }
338 EXPORT_SYMBOL(team_options_register);
339
340 void team_options_unregister(struct team *team,
341                              const struct team_option *option,
342                              size_t option_count)
343 {
344         __team_options_mark_removed(team, option, option_count);
345         __team_options_change_check(team);
346         __team_options_unregister(team, option, option_count);
347 }
348 EXPORT_SYMBOL(team_options_unregister);
349
350 static int team_option_get(struct team *team,
351                            struct team_option_inst *opt_inst,
352                            struct team_gsetter_ctx *ctx)
353 {
354         if (!opt_inst->option->getter)
355                 return -EOPNOTSUPP;
356         return opt_inst->option->getter(team, ctx);
357 }
358
359 static int team_option_set(struct team *team,
360                            struct team_option_inst *opt_inst,
361                            struct team_gsetter_ctx *ctx)
362 {
363         if (!opt_inst->option->setter)
364                 return -EOPNOTSUPP;
365         return opt_inst->option->setter(team, ctx);
366 }
367
368 void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info)
369 {
370         struct team_option_inst *opt_inst;
371
372         opt_inst = container_of(opt_inst_info, struct team_option_inst, info);
373         opt_inst->changed = true;
374 }
375 EXPORT_SYMBOL(team_option_inst_set_change);
376
377 void team_options_change_check(struct team *team)
378 {
379         __team_options_change_check(team);
380 }
381 EXPORT_SYMBOL(team_options_change_check);
382
383
384 /****************
385  * Mode handling
386  ****************/
387
388 static LIST_HEAD(mode_list);
389 static DEFINE_SPINLOCK(mode_list_lock);
390
391 struct team_mode_item {
392         struct list_head list;
393         const struct team_mode *mode;
394 };
395
396 static struct team_mode_item *__find_mode(const char *kind)
397 {
398         struct team_mode_item *mitem;
399
400         list_for_each_entry(mitem, &mode_list, list) {
401                 if (strcmp(mitem->mode->kind, kind) == 0)
402                         return mitem;
403         }
404         return NULL;
405 }
406
407 static bool is_good_mode_name(const char *name)
408 {
409         while (*name != '\0') {
410                 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
411                         return false;
412                 name++;
413         }
414         return true;
415 }
416
417 int team_mode_register(const struct team_mode *mode)
418 {
419         int err = 0;
420         struct team_mode_item *mitem;
421
422         if (!is_good_mode_name(mode->kind) ||
423             mode->priv_size > TEAM_MODE_PRIV_SIZE)
424                 return -EINVAL;
425
426         mitem = kmalloc(sizeof(*mitem), GFP_KERNEL);
427         if (!mitem)
428                 return -ENOMEM;
429
430         spin_lock(&mode_list_lock);
431         if (__find_mode(mode->kind)) {
432                 err = -EEXIST;
433                 kfree(mitem);
434                 goto unlock;
435         }
436         mitem->mode = mode;
437         list_add_tail(&mitem->list, &mode_list);
438 unlock:
439         spin_unlock(&mode_list_lock);
440         return err;
441 }
442 EXPORT_SYMBOL(team_mode_register);
443
444 void team_mode_unregister(const struct team_mode *mode)
445 {
446         struct team_mode_item *mitem;
447
448         spin_lock(&mode_list_lock);
449         mitem = __find_mode(mode->kind);
450         if (mitem) {
451                 list_del_init(&mitem->list);
452                 kfree(mitem);
453         }
454         spin_unlock(&mode_list_lock);
455 }
456 EXPORT_SYMBOL(team_mode_unregister);
457
458 static const struct team_mode *team_mode_get(const char *kind)
459 {
460         struct team_mode_item *mitem;
461         const struct team_mode *mode = NULL;
462
463         spin_lock(&mode_list_lock);
464         mitem = __find_mode(kind);
465         if (!mitem) {
466                 spin_unlock(&mode_list_lock);
467                 request_module("team-mode-%s", kind);
468                 spin_lock(&mode_list_lock);
469                 mitem = __find_mode(kind);
470         }
471         if (mitem) {
472                 mode = mitem->mode;
473                 if (!try_module_get(mode->owner))
474                         mode = NULL;
475         }
476
477         spin_unlock(&mode_list_lock);
478         return mode;
479 }
480
481 static void team_mode_put(const struct team_mode *mode)
482 {
483         module_put(mode->owner);
484 }
485
486 static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
487 {
488         dev_kfree_skb_any(skb);
489         return false;
490 }
491
492 rx_handler_result_t team_dummy_receive(struct team *team,
493                                        struct team_port *port,
494                                        struct sk_buff *skb)
495 {
496         return RX_HANDLER_ANOTHER;
497 }
498
499 static const struct team_mode __team_no_mode = {
500         .kind           = "*NOMODE*",
501 };
502
503 static bool team_is_mode_set(struct team *team)
504 {
505         return team->mode != &__team_no_mode;
506 }
507
508 static void team_set_no_mode(struct team *team)
509 {
510         team->mode = &__team_no_mode;
511 }
512
513 static void __team_adjust_ops(struct team *team, int en_port_count)
514 {
515         /*
516          * To avoid checks in rx/tx skb paths, ensure here that non-null and
517          * correct ops are always set.
518          */
519
520         if (!en_port_count || !team_is_mode_set(team) ||
521             !team->mode->ops->transmit)
522                 team->ops.transmit = team_dummy_transmit;
523         else
524                 team->ops.transmit = team->mode->ops->transmit;
525
526         if (!en_port_count || !team_is_mode_set(team) ||
527             !team->mode->ops->receive)
528                 team->ops.receive = team_dummy_receive;
529         else
530                 team->ops.receive = team->mode->ops->receive;
531 }
532
533 static void team_adjust_ops(struct team *team)
534 {
535         __team_adjust_ops(team, team->en_port_count);
536 }
537
538 /*
539  * We can benefit from the fact that it's ensured no port is present
540  * at the time of mode change. Therefore no packets are in fly so there's no
541  * need to set mode operations in any special way.
542  */
543 static int __team_change_mode(struct team *team,
544                               const struct team_mode *new_mode)
545 {
546         /* Check if mode was previously set and do cleanup if so */
547         if (team_is_mode_set(team)) {
548                 void (*exit_op)(struct team *team) = team->ops.exit;
549
550                 /* Clear ops area so no callback is called any longer */
551                 memset(&team->ops, 0, sizeof(struct team_mode_ops));
552                 team_adjust_ops(team);
553
554                 if (exit_op)
555                         exit_op(team);
556                 team_mode_put(team->mode);
557                 team_set_no_mode(team);
558                 /* zero private data area */
559                 memset(&team->mode_priv, 0,
560                        sizeof(struct team) - offsetof(struct team, mode_priv));
561         }
562
563         if (!new_mode)
564                 return 0;
565
566         if (new_mode->ops->init) {
567                 int err;
568
569                 err = new_mode->ops->init(team);
570                 if (err)
571                         return err;
572         }
573
574         team->mode = new_mode;
575         memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
576         team_adjust_ops(team);
577
578         return 0;
579 }
580
581 static int team_change_mode(struct team *team, const char *kind)
582 {
583         const struct team_mode *new_mode;
584         struct net_device *dev = team->dev;
585         int err;
586
587         if (!list_empty(&team->port_list)) {
588                 netdev_err(dev, "No ports can be present during mode change\n");
589                 return -EBUSY;
590         }
591
592         if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) {
593                 netdev_err(dev, "Unable to change to the same mode the team is in\n");
594                 return -EINVAL;
595         }
596
597         new_mode = team_mode_get(kind);
598         if (!new_mode) {
599                 netdev_err(dev, "Mode \"%s\" not found\n", kind);
600                 return -EINVAL;
601         }
602
603         err = __team_change_mode(team, new_mode);
604         if (err) {
605                 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
606                 team_mode_put(new_mode);
607                 return err;
608         }
609
610         netdev_info(dev, "Mode changed to \"%s\"\n", kind);
611         return 0;
612 }
613
614
615 /************************
616  * Rx path frame handler
617  ************************/
618
619 /* note: already called with rcu_read_lock */
620 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
621 {
622         struct sk_buff *skb = *pskb;
623         struct team_port *port;
624         struct team *team;
625         rx_handler_result_t res;
626
627         skb = skb_share_check(skb, GFP_ATOMIC);
628         if (!skb)
629                 return RX_HANDLER_CONSUMED;
630
631         *pskb = skb;
632
633         port = team_port_get_rcu(skb->dev);
634         team = port->team;
635         if (!team_port_enabled(port)) {
636                 /* allow exact match delivery for disabled ports */
637                 res = RX_HANDLER_EXACT;
638         } else {
639                 res = team->ops.receive(team, port, skb);
640         }
641         if (res == RX_HANDLER_ANOTHER) {
642                 struct team_pcpu_stats *pcpu_stats;
643
644                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
645                 u64_stats_update_begin(&pcpu_stats->syncp);
646                 pcpu_stats->rx_packets++;
647                 pcpu_stats->rx_bytes += skb->len;
648                 if (skb->pkt_type == PACKET_MULTICAST)
649                         pcpu_stats->rx_multicast++;
650                 u64_stats_update_end(&pcpu_stats->syncp);
651
652                 skb->dev = team->dev;
653         } else {
654                 this_cpu_inc(team->pcpu_stats->rx_dropped);
655         }
656
657         return res;
658 }
659
660
661 /****************
662  * Port handling
663  ****************/
664
665 static bool team_port_find(const struct team *team,
666                            const struct team_port *port)
667 {
668         struct team_port *cur;
669
670         list_for_each_entry(cur, &team->port_list, list)
671                 if (cur == port)
672                         return true;
673         return false;
674 }
675
676 /*
677  * Enable/disable port by adding to enabled port hashlist and setting
678  * port->index (Might be racy so reader could see incorrect ifindex when
679  * processing a flying packet, but that is not a problem). Write guarded
680  * by team->lock.
681  */
682 static void team_port_enable(struct team *team,
683                              struct team_port *port)
684 {
685         if (team_port_enabled(port))
686                 return;
687         port->index = team->en_port_count++;
688         hlist_add_head_rcu(&port->hlist,
689                            team_port_index_hash(team, port->index));
690         team_adjust_ops(team);
691         if (team->ops.port_enabled)
692                 team->ops.port_enabled(team, port);
693 }
694
695 static void __reconstruct_port_hlist(struct team *team, int rm_index)
696 {
697         int i;
698         struct team_port *port;
699
700         for (i = rm_index + 1; i < team->en_port_count; i++) {
701                 port = team_get_port_by_index(team, i);
702                 hlist_del_rcu(&port->hlist);
703                 port->index--;
704                 hlist_add_head_rcu(&port->hlist,
705                                    team_port_index_hash(team, port->index));
706         }
707 }
708
709 static void team_port_disable(struct team *team,
710                               struct team_port *port)
711 {
712         if (!team_port_enabled(port))
713                 return;
714         if (team->ops.port_disabled)
715                 team->ops.port_disabled(team, port);
716         hlist_del_rcu(&port->hlist);
717         __reconstruct_port_hlist(team, port->index);
718         port->index = -1;
719         __team_adjust_ops(team, team->en_port_count - 1);
720         /*
721          * Wait until readers see adjusted ops. This ensures that
722          * readers never see team->en_port_count == 0
723          */
724         synchronize_rcu();
725         team->en_port_count--;
726 }
727
728 #define TEAM_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \
729                             NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
730                             NETIF_F_HIGHDMA | NETIF_F_LRO)
731
732 static void __team_compute_features(struct team *team)
733 {
734         struct team_port *port;
735         u32 vlan_features = TEAM_VLAN_FEATURES;
736         unsigned short max_hard_header_len = ETH_HLEN;
737         unsigned int flags, dst_release_flag = IFF_XMIT_DST_RELEASE;
738
739         list_for_each_entry(port, &team->port_list, list) {
740                 vlan_features = netdev_increment_features(vlan_features,
741                                         port->dev->vlan_features,
742                                         TEAM_VLAN_FEATURES);
743
744                 dst_release_flag &= port->dev->priv_flags;
745                 if (port->dev->hard_header_len > max_hard_header_len)
746                         max_hard_header_len = port->dev->hard_header_len;
747         }
748
749         team->dev->vlan_features = vlan_features;
750         team->dev->hard_header_len = max_hard_header_len;
751
752         flags = team->dev->priv_flags & ~IFF_XMIT_DST_RELEASE;
753         team->dev->priv_flags = flags | dst_release_flag;
754
755         netdev_change_features(team->dev);
756 }
757
758 static void team_compute_features(struct team *team)
759 {
760         mutex_lock(&team->lock);
761         __team_compute_features(team);
762         mutex_unlock(&team->lock);
763 }
764
765 static int team_port_enter(struct team *team, struct team_port *port)
766 {
767         int err = 0;
768
769         dev_hold(team->dev);
770         port->dev->priv_flags |= IFF_TEAM_PORT;
771         if (team->ops.port_enter) {
772                 err = team->ops.port_enter(team, port);
773                 if (err) {
774                         netdev_err(team->dev, "Device %s failed to enter team mode\n",
775                                    port->dev->name);
776                         goto err_port_enter;
777                 }
778         }
779
780         return 0;
781
782 err_port_enter:
783         port->dev->priv_flags &= ~IFF_TEAM_PORT;
784         dev_put(team->dev);
785
786         return err;
787 }
788
789 static void team_port_leave(struct team *team, struct team_port *port)
790 {
791         if (team->ops.port_leave)
792                 team->ops.port_leave(team, port);
793         port->dev->priv_flags &= ~IFF_TEAM_PORT;
794         dev_put(team->dev);
795 }
796
797 #ifdef CONFIG_NET_POLL_CONTROLLER
798 static int team_port_enable_netpoll(struct team *team, struct team_port *port)
799 {
800         struct netpoll *np;
801         int err;
802
803         np = kzalloc(sizeof(*np), GFP_KERNEL);
804         if (!np)
805                 return -ENOMEM;
806
807         err = __netpoll_setup(np, port->dev);
808         if (err) {
809                 kfree(np);
810                 return err;
811         }
812         port->np = np;
813         return err;
814 }
815
816 static void team_port_disable_netpoll(struct team_port *port)
817 {
818         struct netpoll *np = port->np;
819
820         if (!np)
821                 return;
822         port->np = NULL;
823
824         /* Wait for transmitting packets to finish before freeing. */
825         synchronize_rcu_bh();
826         __netpoll_cleanup(np);
827         kfree(np);
828 }
829
830 static struct netpoll_info *team_netpoll_info(struct team *team)
831 {
832         return team->dev->npinfo;
833 }
834
835 #else
836 static int team_port_enable_netpoll(struct team *team, struct team_port *port)
837 {
838         return 0;
839 }
840 static void team_port_disable_netpoll(struct team_port *port)
841 {
842 }
843 static struct netpoll_info *team_netpoll_info(struct team *team)
844 {
845         return NULL;
846 }
847 #endif
848
849 static void __team_port_change_check(struct team_port *port, bool linkup);
850
851 static int team_port_add(struct team *team, struct net_device *port_dev)
852 {
853         struct net_device *dev = team->dev;
854         struct team_port *port;
855         char *portname = port_dev->name;
856         int err;
857
858         if (port_dev->flags & IFF_LOOPBACK ||
859             port_dev->type != ARPHRD_ETHER) {
860                 netdev_err(dev, "Device %s is of an unsupported type\n",
861                            portname);
862                 return -EINVAL;
863         }
864
865         if (team_port_exists(port_dev)) {
866                 netdev_err(dev, "Device %s is already a port "
867                                 "of a team device\n", portname);
868                 return -EBUSY;
869         }
870
871         if (port_dev->flags & IFF_UP) {
872                 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
873                            portname);
874                 return -EBUSY;
875         }
876
877         port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
878                        GFP_KERNEL);
879         if (!port)
880                 return -ENOMEM;
881
882         port->dev = port_dev;
883         port->team = team;
884
885         port->orig.mtu = port_dev->mtu;
886         err = dev_set_mtu(port_dev, dev->mtu);
887         if (err) {
888                 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
889                 goto err_set_mtu;
890         }
891
892         memcpy(port->orig.dev_addr, port_dev->dev_addr, ETH_ALEN);
893
894         err = team_port_enter(team, port);
895         if (err) {
896                 netdev_err(dev, "Device %s failed to enter team mode\n",
897                            portname);
898                 goto err_port_enter;
899         }
900
901         err = dev_open(port_dev);
902         if (err) {
903                 netdev_dbg(dev, "Device %s opening failed\n",
904                            portname);
905                 goto err_dev_open;
906         }
907
908         err = vlan_vids_add_by_dev(port_dev, dev);
909         if (err) {
910                 netdev_err(dev, "Failed to add vlan ids to device %s\n",
911                                 portname);
912                 goto err_vids_add;
913         }
914
915         if (team_netpoll_info(team)) {
916                 err = team_port_enable_netpoll(team, port);
917                 if (err) {
918                         netdev_err(dev, "Failed to enable netpoll on device %s\n",
919                                    portname);
920                         goto err_enable_netpoll;
921                 }
922         }
923
924         err = netdev_set_master(port_dev, dev);
925         if (err) {
926                 netdev_err(dev, "Device %s failed to set master\n", portname);
927                 goto err_set_master;
928         }
929
930         err = netdev_rx_handler_register(port_dev, team_handle_frame,
931                                          port);
932         if (err) {
933                 netdev_err(dev, "Device %s failed to register rx_handler\n",
934                            portname);
935                 goto err_handler_register;
936         }
937
938         err = __team_option_inst_add_port(team, port);
939         if (err) {
940                 netdev_err(dev, "Device %s failed to add per-port options\n",
941                            portname);
942                 goto err_option_port_add;
943         }
944
945         port->index = -1;
946         team_port_enable(team, port);
947         list_add_tail_rcu(&port->list, &team->port_list);
948         __team_compute_features(team);
949         __team_port_change_check(port, !!netif_carrier_ok(port_dev));
950         __team_options_change_check(team);
951
952         netdev_info(dev, "Port device %s added\n", portname);
953
954         return 0;
955
956 err_option_port_add:
957         netdev_rx_handler_unregister(port_dev);
958
959 err_handler_register:
960         netdev_set_master(port_dev, NULL);
961
962 err_set_master:
963         team_port_disable_netpoll(port);
964
965 err_enable_netpoll:
966         vlan_vids_del_by_dev(port_dev, dev);
967
968 err_vids_add:
969         dev_close(port_dev);
970
971 err_dev_open:
972         team_port_leave(team, port);
973         team_port_set_orig_mac(port);
974
975 err_port_enter:
976         dev_set_mtu(port_dev, port->orig.mtu);
977
978 err_set_mtu:
979         kfree(port);
980
981         return err;
982 }
983
984 static int team_port_del(struct team *team, struct net_device *port_dev)
985 {
986         struct net_device *dev = team->dev;
987         struct team_port *port;
988         char *portname = port_dev->name;
989
990         port = team_port_get_rtnl(port_dev);
991         if (!port || !team_port_find(team, port)) {
992                 netdev_err(dev, "Device %s does not act as a port of this team\n",
993                            portname);
994                 return -ENOENT;
995         }
996
997         __team_option_inst_mark_removed_port(team, port);
998         __team_options_change_check(team);
999         __team_option_inst_del_port(team, port);
1000         port->removed = true;
1001         __team_port_change_check(port, false);
1002         team_port_disable(team, port);
1003         list_del_rcu(&port->list);
1004         netdev_rx_handler_unregister(port_dev);
1005         netdev_set_master(port_dev, NULL);
1006         team_port_disable_netpoll(port);
1007         vlan_vids_del_by_dev(port_dev, dev);
1008         dev_close(port_dev);
1009         team_port_leave(team, port);
1010         team_port_set_orig_mac(port);
1011         dev_set_mtu(port_dev, port->orig.mtu);
1012         synchronize_rcu();
1013         kfree(port);
1014         netdev_info(dev, "Port device %s removed\n", portname);
1015         __team_compute_features(team);
1016
1017         return 0;
1018 }
1019
1020
1021 /*****************
1022  * Net device ops
1023  *****************/
1024
1025 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1026 {
1027         ctx->data.str_val = team->mode->kind;
1028         return 0;
1029 }
1030
1031 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1032 {
1033         return team_change_mode(team, ctx->data.str_val);
1034 }
1035
1036 static int team_port_en_option_get(struct team *team,
1037                                    struct team_gsetter_ctx *ctx)
1038 {
1039         struct team_port *port = ctx->info->port;
1040
1041         ctx->data.bool_val = team_port_enabled(port);
1042         return 0;
1043 }
1044
1045 static int team_port_en_option_set(struct team *team,
1046                                    struct team_gsetter_ctx *ctx)
1047 {
1048         struct team_port *port = ctx->info->port;
1049
1050         if (ctx->data.bool_val)
1051                 team_port_enable(team, port);
1052         else
1053                 team_port_disable(team, port);
1054         return 0;
1055 }
1056
1057 static int team_user_linkup_option_get(struct team *team,
1058                                        struct team_gsetter_ctx *ctx)
1059 {
1060         struct team_port *port = ctx->info->port;
1061
1062         ctx->data.bool_val = port->user.linkup;
1063         return 0;
1064 }
1065
1066 static int team_user_linkup_option_set(struct team *team,
1067                                        struct team_gsetter_ctx *ctx)
1068 {
1069         struct team_port *port = ctx->info->port;
1070
1071         port->user.linkup = ctx->data.bool_val;
1072         team_refresh_port_linkup(port);
1073         return 0;
1074 }
1075
1076 static int team_user_linkup_en_option_get(struct team *team,
1077                                           struct team_gsetter_ctx *ctx)
1078 {
1079         struct team_port *port = ctx->info->port;
1080
1081         ctx->data.bool_val = port->user.linkup_enabled;
1082         return 0;
1083 }
1084
1085 static int team_user_linkup_en_option_set(struct team *team,
1086                                           struct team_gsetter_ctx *ctx)
1087 {
1088         struct team_port *port = ctx->info->port;
1089
1090         port->user.linkup_enabled = ctx->data.bool_val;
1091         team_refresh_port_linkup(port);
1092         return 0;
1093 }
1094
1095 static const struct team_option team_options[] = {
1096         {
1097                 .name = "mode",
1098                 .type = TEAM_OPTION_TYPE_STRING,
1099                 .getter = team_mode_option_get,
1100                 .setter = team_mode_option_set,
1101         },
1102         {
1103                 .name = "enabled",
1104                 .type = TEAM_OPTION_TYPE_BOOL,
1105                 .per_port = true,
1106                 .getter = team_port_en_option_get,
1107                 .setter = team_port_en_option_set,
1108         },
1109         {
1110                 .name = "user_linkup",
1111                 .type = TEAM_OPTION_TYPE_BOOL,
1112                 .per_port = true,
1113                 .getter = team_user_linkup_option_get,
1114                 .setter = team_user_linkup_option_set,
1115         },
1116         {
1117                 .name = "user_linkup_enabled",
1118                 .type = TEAM_OPTION_TYPE_BOOL,
1119                 .per_port = true,
1120                 .getter = team_user_linkup_en_option_get,
1121                 .setter = team_user_linkup_en_option_set,
1122         },
1123 };
1124
1125 static struct lock_class_key team_netdev_xmit_lock_key;
1126 static struct lock_class_key team_netdev_addr_lock_key;
1127
1128 static void team_set_lockdep_class_one(struct net_device *dev,
1129                                        struct netdev_queue *txq,
1130                                        void *unused)
1131 {
1132         lockdep_set_class(&txq->_xmit_lock, &team_netdev_xmit_lock_key);
1133 }
1134
1135 static void team_set_lockdep_class(struct net_device *dev)
1136 {
1137         lockdep_set_class(&dev->addr_list_lock, &team_netdev_addr_lock_key);
1138         netdev_for_each_tx_queue(dev, team_set_lockdep_class_one, NULL);
1139 }
1140
1141 static int team_init(struct net_device *dev)
1142 {
1143         struct team *team = netdev_priv(dev);
1144         int i;
1145         int err;
1146
1147         team->dev = dev;
1148         mutex_init(&team->lock);
1149         team_set_no_mode(team);
1150
1151         team->pcpu_stats = alloc_percpu(struct team_pcpu_stats);
1152         if (!team->pcpu_stats)
1153                 return -ENOMEM;
1154
1155         for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1156                 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1157         INIT_LIST_HEAD(&team->port_list);
1158
1159         team_adjust_ops(team);
1160
1161         INIT_LIST_HEAD(&team->option_list);
1162         INIT_LIST_HEAD(&team->option_inst_list);
1163         err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1164         if (err)
1165                 goto err_options_register;
1166         netif_carrier_off(dev);
1167
1168         team_set_lockdep_class(dev);
1169
1170         return 0;
1171
1172 err_options_register:
1173         free_percpu(team->pcpu_stats);
1174
1175         return err;
1176 }
1177
1178 static void team_uninit(struct net_device *dev)
1179 {
1180         struct team *team = netdev_priv(dev);
1181         struct team_port *port;
1182         struct team_port *tmp;
1183
1184         mutex_lock(&team->lock);
1185         list_for_each_entry_safe(port, tmp, &team->port_list, list)
1186                 team_port_del(team, port->dev);
1187
1188         __team_change_mode(team, NULL); /* cleanup */
1189         __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1190         mutex_unlock(&team->lock);
1191 }
1192
1193 static void team_destructor(struct net_device *dev)
1194 {
1195         struct team *team = netdev_priv(dev);
1196
1197         free_percpu(team->pcpu_stats);
1198         free_netdev(dev);
1199 }
1200
1201 static int team_open(struct net_device *dev)
1202 {
1203         netif_carrier_on(dev);
1204         return 0;
1205 }
1206
1207 static int team_close(struct net_device *dev)
1208 {
1209         netif_carrier_off(dev);
1210         return 0;
1211 }
1212
1213 /*
1214  * note: already called with rcu_read_lock
1215  */
1216 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1217 {
1218         struct team *team = netdev_priv(dev);
1219         bool tx_success = false;
1220         unsigned int len = skb->len;
1221
1222         tx_success = team->ops.transmit(team, skb);
1223         if (tx_success) {
1224                 struct team_pcpu_stats *pcpu_stats;
1225
1226                 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1227                 u64_stats_update_begin(&pcpu_stats->syncp);
1228                 pcpu_stats->tx_packets++;
1229                 pcpu_stats->tx_bytes += len;
1230                 u64_stats_update_end(&pcpu_stats->syncp);
1231         } else {
1232                 this_cpu_inc(team->pcpu_stats->tx_dropped);
1233         }
1234
1235         return NETDEV_TX_OK;
1236 }
1237
1238 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb)
1239 {
1240         /*
1241          * This helper function exists to help dev_pick_tx get the correct
1242          * destination queue.  Using a helper function skips a call to
1243          * skb_tx_hash and will put the skbs in the queue we expect on their
1244          * way down to the team driver.
1245          */
1246         u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1247
1248         /*
1249          * Save the original txq to restore before passing to the driver
1250          */
1251         qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1252
1253         if (unlikely(txq >= dev->real_num_tx_queues)) {
1254                 do {
1255                         txq -= dev->real_num_tx_queues;
1256                 } while (txq >= dev->real_num_tx_queues);
1257         }
1258         return txq;
1259 }
1260
1261 static void team_change_rx_flags(struct net_device *dev, int change)
1262 {
1263         struct team *team = netdev_priv(dev);
1264         struct team_port *port;
1265         int inc;
1266
1267         rcu_read_lock();
1268         list_for_each_entry_rcu(port, &team->port_list, list) {
1269                 if (change & IFF_PROMISC) {
1270                         inc = dev->flags & IFF_PROMISC ? 1 : -1;
1271                         dev_set_promiscuity(port->dev, inc);
1272                 }
1273                 if (change & IFF_ALLMULTI) {
1274                         inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1275                         dev_set_allmulti(port->dev, inc);
1276                 }
1277         }
1278         rcu_read_unlock();
1279 }
1280
1281 static void team_set_rx_mode(struct net_device *dev)
1282 {
1283         struct team *team = netdev_priv(dev);
1284         struct team_port *port;
1285
1286         rcu_read_lock();
1287         list_for_each_entry_rcu(port, &team->port_list, list) {
1288                 dev_uc_sync(port->dev, dev);
1289                 dev_mc_sync(port->dev, dev);
1290         }
1291         rcu_read_unlock();
1292 }
1293
1294 static int team_set_mac_address(struct net_device *dev, void *p)
1295 {
1296         struct team *team = netdev_priv(dev);
1297         struct team_port *port;
1298         int err;
1299
1300         err = eth_mac_addr(dev, p);
1301         if (err)
1302                 return err;
1303         rcu_read_lock();
1304         list_for_each_entry_rcu(port, &team->port_list, list)
1305                 if (team->ops.port_change_mac)
1306                         team->ops.port_change_mac(team, port);
1307         rcu_read_unlock();
1308         return 0;
1309 }
1310
1311 static int team_change_mtu(struct net_device *dev, int new_mtu)
1312 {
1313         struct team *team = netdev_priv(dev);
1314         struct team_port *port;
1315         int err;
1316
1317         /*
1318          * Alhough this is reader, it's guarded by team lock. It's not possible
1319          * to traverse list in reverse under rcu_read_lock
1320          */
1321         mutex_lock(&team->lock);
1322         list_for_each_entry(port, &team->port_list, list) {
1323                 err = dev_set_mtu(port->dev, new_mtu);
1324                 if (err) {
1325                         netdev_err(dev, "Device %s failed to change mtu",
1326                                    port->dev->name);
1327                         goto unwind;
1328                 }
1329         }
1330         mutex_unlock(&team->lock);
1331
1332         dev->mtu = new_mtu;
1333
1334         return 0;
1335
1336 unwind:
1337         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1338                 dev_set_mtu(port->dev, dev->mtu);
1339         mutex_unlock(&team->lock);
1340
1341         return err;
1342 }
1343
1344 static struct rtnl_link_stats64 *
1345 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1346 {
1347         struct team *team = netdev_priv(dev);
1348         struct team_pcpu_stats *p;
1349         u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1350         u32 rx_dropped = 0, tx_dropped = 0;
1351         unsigned int start;
1352         int i;
1353
1354         for_each_possible_cpu(i) {
1355                 p = per_cpu_ptr(team->pcpu_stats, i);
1356                 do {
1357                         start = u64_stats_fetch_begin_bh(&p->syncp);
1358                         rx_packets      = p->rx_packets;
1359                         rx_bytes        = p->rx_bytes;
1360                         rx_multicast    = p->rx_multicast;
1361                         tx_packets      = p->tx_packets;
1362                         tx_bytes        = p->tx_bytes;
1363                 } while (u64_stats_fetch_retry_bh(&p->syncp, start));
1364
1365                 stats->rx_packets       += rx_packets;
1366                 stats->rx_bytes         += rx_bytes;
1367                 stats->multicast        += rx_multicast;
1368                 stats->tx_packets       += tx_packets;
1369                 stats->tx_bytes         += tx_bytes;
1370                 /*
1371                  * rx_dropped & tx_dropped are u32, updated
1372                  * without syncp protection.
1373                  */
1374                 rx_dropped      += p->rx_dropped;
1375                 tx_dropped      += p->tx_dropped;
1376         }
1377         stats->rx_dropped       = rx_dropped;
1378         stats->tx_dropped       = tx_dropped;
1379         return stats;
1380 }
1381
1382 static int team_vlan_rx_add_vid(struct net_device *dev, uint16_t vid)
1383 {
1384         struct team *team = netdev_priv(dev);
1385         struct team_port *port;
1386         int err;
1387
1388         /*
1389          * Alhough this is reader, it's guarded by team lock. It's not possible
1390          * to traverse list in reverse under rcu_read_lock
1391          */
1392         mutex_lock(&team->lock);
1393         list_for_each_entry(port, &team->port_list, list) {
1394                 err = vlan_vid_add(port->dev, vid);
1395                 if (err)
1396                         goto unwind;
1397         }
1398         mutex_unlock(&team->lock);
1399
1400         return 0;
1401
1402 unwind:
1403         list_for_each_entry_continue_reverse(port, &team->port_list, list)
1404                 vlan_vid_del(port->dev, vid);
1405         mutex_unlock(&team->lock);
1406
1407         return err;
1408 }
1409
1410 static int team_vlan_rx_kill_vid(struct net_device *dev, uint16_t vid)
1411 {
1412         struct team *team = netdev_priv(dev);
1413         struct team_port *port;
1414
1415         rcu_read_lock();
1416         list_for_each_entry_rcu(port, &team->port_list, list)
1417                 vlan_vid_del(port->dev, vid);
1418         rcu_read_unlock();
1419
1420         return 0;
1421 }
1422
1423 #ifdef CONFIG_NET_POLL_CONTROLLER
1424 static void team_poll_controller(struct net_device *dev)
1425 {
1426 }
1427
1428 static void __team_netpoll_cleanup(struct team *team)
1429 {
1430         struct team_port *port;
1431
1432         list_for_each_entry(port, &team->port_list, list)
1433                 team_port_disable_netpoll(port);
1434 }
1435
1436 static void team_netpoll_cleanup(struct net_device *dev)
1437 {
1438         struct team *team = netdev_priv(dev);
1439
1440         mutex_lock(&team->lock);
1441         __team_netpoll_cleanup(team);
1442         mutex_unlock(&team->lock);
1443 }
1444
1445 static int team_netpoll_setup(struct net_device *dev,
1446                               struct netpoll_info *npifo)
1447 {
1448         struct team *team = netdev_priv(dev);
1449         struct team_port *port;
1450         int err = 0;
1451
1452         mutex_lock(&team->lock);
1453         list_for_each_entry(port, &team->port_list, list) {
1454                 err = team_port_enable_netpoll(team, port);
1455                 if (err) {
1456                         __team_netpoll_cleanup(team);
1457                         break;
1458                 }
1459         }
1460         mutex_unlock(&team->lock);
1461         return err;
1462 }
1463 #endif
1464
1465 static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
1466 {
1467         struct team *team = netdev_priv(dev);
1468         int err;
1469
1470         mutex_lock(&team->lock);
1471         err = team_port_add(team, port_dev);
1472         mutex_unlock(&team->lock);
1473         return err;
1474 }
1475
1476 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1477 {
1478         struct team *team = netdev_priv(dev);
1479         int err;
1480
1481         mutex_lock(&team->lock);
1482         err = team_port_del(team, port_dev);
1483         mutex_unlock(&team->lock);
1484         return err;
1485 }
1486
1487 static netdev_features_t team_fix_features(struct net_device *dev,
1488                                            netdev_features_t features)
1489 {
1490         struct team_port *port;
1491         struct team *team = netdev_priv(dev);
1492         netdev_features_t mask;
1493
1494         mask = features;
1495         features &= ~NETIF_F_ONE_FOR_ALL;
1496         features |= NETIF_F_ALL_FOR_ALL;
1497
1498         rcu_read_lock();
1499         list_for_each_entry_rcu(port, &team->port_list, list) {
1500                 features = netdev_increment_features(features,
1501                                                      port->dev->features,
1502                                                      mask);
1503         }
1504         rcu_read_unlock();
1505         return features;
1506 }
1507
1508 static const struct net_device_ops team_netdev_ops = {
1509         .ndo_init               = team_init,
1510         .ndo_uninit             = team_uninit,
1511         .ndo_open               = team_open,
1512         .ndo_stop               = team_close,
1513         .ndo_start_xmit         = team_xmit,
1514         .ndo_select_queue       = team_select_queue,
1515         .ndo_change_rx_flags    = team_change_rx_flags,
1516         .ndo_set_rx_mode        = team_set_rx_mode,
1517         .ndo_set_mac_address    = team_set_mac_address,
1518         .ndo_change_mtu         = team_change_mtu,
1519         .ndo_get_stats64        = team_get_stats64,
1520         .ndo_vlan_rx_add_vid    = team_vlan_rx_add_vid,
1521         .ndo_vlan_rx_kill_vid   = team_vlan_rx_kill_vid,
1522 #ifdef CONFIG_NET_POLL_CONTROLLER
1523         .ndo_poll_controller    = team_poll_controller,
1524         .ndo_netpoll_setup      = team_netpoll_setup,
1525         .ndo_netpoll_cleanup    = team_netpoll_cleanup,
1526 #endif
1527         .ndo_add_slave          = team_add_slave,
1528         .ndo_del_slave          = team_del_slave,
1529         .ndo_fix_features       = team_fix_features,
1530 };
1531
1532
1533 /***********************
1534  * rt netlink interface
1535  ***********************/
1536
1537 static void team_setup(struct net_device *dev)
1538 {
1539         ether_setup(dev);
1540
1541         dev->netdev_ops = &team_netdev_ops;
1542         dev->destructor = team_destructor;
1543         dev->tx_queue_len = 0;
1544         dev->flags |= IFF_MULTICAST;
1545         dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
1546
1547         /*
1548          * Indicate we support unicast address filtering. That way core won't
1549          * bring us to promisc mode in case a unicast addr is added.
1550          * Let this up to underlay drivers.
1551          */
1552         dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
1553
1554         dev->features |= NETIF_F_LLTX;
1555         dev->features |= NETIF_F_GRO;
1556         dev->hw_features = NETIF_F_HW_VLAN_TX |
1557                            NETIF_F_HW_VLAN_RX |
1558                            NETIF_F_HW_VLAN_FILTER;
1559
1560         dev->features |= dev->hw_features;
1561 }
1562
1563 static int team_newlink(struct net *src_net, struct net_device *dev,
1564                         struct nlattr *tb[], struct nlattr *data[])
1565 {
1566         int err;
1567
1568         if (tb[IFLA_ADDRESS] == NULL)
1569                 eth_hw_addr_random(dev);
1570
1571         err = register_netdevice(dev);
1572         if (err)
1573                 return err;
1574
1575         return 0;
1576 }
1577
1578 static int team_validate(struct nlattr *tb[], struct nlattr *data[])
1579 {
1580         if (tb[IFLA_ADDRESS]) {
1581                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
1582                         return -EINVAL;
1583                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
1584                         return -EADDRNOTAVAIL;
1585         }
1586         return 0;
1587 }
1588
1589 static unsigned int team_get_num_tx_queues(void)
1590 {
1591         return TEAM_DEFAULT_NUM_TX_QUEUES;
1592 }
1593
1594 static unsigned int team_get_num_rx_queues(void)
1595 {
1596         return TEAM_DEFAULT_NUM_RX_QUEUES;
1597 }
1598
1599 static struct rtnl_link_ops team_link_ops __read_mostly = {
1600         .kind                   = DRV_NAME,
1601         .priv_size              = sizeof(struct team),
1602         .setup                  = team_setup,
1603         .newlink                = team_newlink,
1604         .validate               = team_validate,
1605         .get_num_tx_queues      = team_get_num_tx_queues,
1606         .get_num_rx_queues      = team_get_num_rx_queues,
1607 };
1608
1609
1610 /***********************************
1611  * Generic netlink custom interface
1612  ***********************************/
1613
1614 static struct genl_family team_nl_family = {
1615         .id             = GENL_ID_GENERATE,
1616         .name           = TEAM_GENL_NAME,
1617         .version        = TEAM_GENL_VERSION,
1618         .maxattr        = TEAM_ATTR_MAX,
1619         .netnsok        = true,
1620 };
1621
1622 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
1623         [TEAM_ATTR_UNSPEC]                      = { .type = NLA_UNSPEC, },
1624         [TEAM_ATTR_TEAM_IFINDEX]                = { .type = NLA_U32 },
1625         [TEAM_ATTR_LIST_OPTION]                 = { .type = NLA_NESTED },
1626         [TEAM_ATTR_LIST_PORT]                   = { .type = NLA_NESTED },
1627 };
1628
1629 static const struct nla_policy
1630 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
1631         [TEAM_ATTR_OPTION_UNSPEC]               = { .type = NLA_UNSPEC, },
1632         [TEAM_ATTR_OPTION_NAME] = {
1633                 .type = NLA_STRING,
1634                 .len = TEAM_STRING_MAX_LEN,
1635         },
1636         [TEAM_ATTR_OPTION_CHANGED]              = { .type = NLA_FLAG },
1637         [TEAM_ATTR_OPTION_TYPE]                 = { .type = NLA_U8 },
1638         [TEAM_ATTR_OPTION_DATA]                 = { .type = NLA_BINARY },
1639 };
1640
1641 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
1642 {
1643         struct sk_buff *msg;
1644         void *hdr;
1645         int err;
1646
1647         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1648         if (!msg)
1649                 return -ENOMEM;
1650
1651         hdr = genlmsg_put(msg, info->snd_pid, info->snd_seq,
1652                           &team_nl_family, 0, TEAM_CMD_NOOP);
1653         if (IS_ERR(hdr)) {
1654                 err = PTR_ERR(hdr);
1655                 goto err_msg_put;
1656         }
1657
1658         genlmsg_end(msg, hdr);
1659
1660         return genlmsg_unicast(genl_info_net(info), msg, info->snd_pid);
1661
1662 err_msg_put:
1663         nlmsg_free(msg);
1664
1665         return err;
1666 }
1667
1668 /*
1669  * Netlink cmd functions should be locked by following two functions.
1670  * Since dev gets held here, that ensures dev won't disappear in between.
1671  */
1672 static struct team *team_nl_team_get(struct genl_info *info)
1673 {
1674         struct net *net = genl_info_net(info);
1675         int ifindex;
1676         struct net_device *dev;
1677         struct team *team;
1678
1679         if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
1680                 return NULL;
1681
1682         ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
1683         dev = dev_get_by_index(net, ifindex);
1684         if (!dev || dev->netdev_ops != &team_netdev_ops) {
1685                 if (dev)
1686                         dev_put(dev);
1687                 return NULL;
1688         }
1689
1690         team = netdev_priv(dev);
1691         mutex_lock(&team->lock);
1692         return team;
1693 }
1694
1695 static void team_nl_team_put(struct team *team)
1696 {
1697         mutex_unlock(&team->lock);
1698         dev_put(team->dev);
1699 }
1700
1701 static int team_nl_send_generic(struct genl_info *info, struct team *team,
1702                                 int (*fill_func)(struct sk_buff *skb,
1703                                                  struct genl_info *info,
1704                                                  int flags, struct team *team))
1705 {
1706         struct sk_buff *skb;
1707         int err;
1708
1709         skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1710         if (!skb)
1711                 return -ENOMEM;
1712
1713         err = fill_func(skb, info, NLM_F_ACK, team);
1714         if (err < 0)
1715                 goto err_fill;
1716
1717         err = genlmsg_unicast(genl_info_net(info), skb, info->snd_pid);
1718         return err;
1719
1720 err_fill:
1721         nlmsg_free(skb);
1722         return err;
1723 }
1724
1725 typedef int team_nl_send_func_t(struct sk_buff *skb,
1726                                 struct team *team, u32 pid);
1727
1728 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 pid)
1729 {
1730         return genlmsg_unicast(dev_net(team->dev), skb, pid);
1731 }
1732
1733 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
1734                                        struct team_option_inst *opt_inst)
1735 {
1736         struct nlattr *option_item;
1737         struct team_option *option = opt_inst->option;
1738         struct team_option_inst_info *opt_inst_info = &opt_inst->info;
1739         struct team_gsetter_ctx ctx;
1740         int err;
1741
1742         ctx.info = opt_inst_info;
1743         err = team_option_get(team, opt_inst, &ctx);
1744         if (err)
1745                 return err;
1746
1747         option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
1748         if (!option_item)
1749                 return -EMSGSIZE;
1750
1751         if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
1752                 goto nest_cancel;
1753         if (opt_inst_info->port &&
1754             nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
1755                         opt_inst_info->port->dev->ifindex))
1756                 goto nest_cancel;
1757         if (opt_inst->option->array_size &&
1758             nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
1759                         opt_inst_info->array_index))
1760                 goto nest_cancel;
1761
1762         switch (option->type) {
1763         case TEAM_OPTION_TYPE_U32:
1764                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
1765                         goto nest_cancel;
1766                 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
1767                         goto nest_cancel;
1768                 break;
1769         case TEAM_OPTION_TYPE_STRING:
1770                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
1771                         goto nest_cancel;
1772                 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
1773                                    ctx.data.str_val))
1774                         goto nest_cancel;
1775                 break;
1776         case TEAM_OPTION_TYPE_BINARY:
1777                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
1778                         goto nest_cancel;
1779                 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
1780                             ctx.data.bin_val.ptr))
1781                         goto nest_cancel;
1782                 break;
1783         case TEAM_OPTION_TYPE_BOOL:
1784                 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
1785                         goto nest_cancel;
1786                 if (ctx.data.bool_val &&
1787                     nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
1788                         goto nest_cancel;
1789                 break;
1790         default:
1791                 BUG();
1792         }
1793         if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
1794                 goto nest_cancel;
1795         if (opt_inst->changed) {
1796                 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
1797                         goto nest_cancel;
1798                 opt_inst->changed = false;
1799         }
1800         nla_nest_end(skb, option_item);
1801         return 0;
1802
1803 nest_cancel:
1804         nla_nest_cancel(skb, option_item);
1805         return -EMSGSIZE;
1806 }
1807
1808 static int __send_and_alloc_skb(struct sk_buff **pskb,
1809                                 struct team *team, u32 pid,
1810                                 team_nl_send_func_t *send_func)
1811 {
1812         int err;
1813
1814         if (*pskb) {
1815                 err = send_func(*pskb, team, pid);
1816                 if (err)
1817                         return err;
1818         }
1819         *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
1820         if (!*pskb)
1821                 return -ENOMEM;
1822         return 0;
1823 }
1824
1825 static int team_nl_send_options_get(struct team *team, u32 pid, u32 seq,
1826                                     int flags, team_nl_send_func_t *send_func,
1827                                     struct list_head *sel_opt_inst_list)
1828 {
1829         struct nlattr *option_list;
1830         struct nlmsghdr *nlh;
1831         void *hdr;
1832         struct team_option_inst *opt_inst;
1833         int err;
1834         struct sk_buff *skb = NULL;
1835         bool incomplete;
1836         int i;
1837
1838         opt_inst = list_first_entry(sel_opt_inst_list,
1839                                     struct team_option_inst, tmp_list);
1840
1841 start_again:
1842         err = __send_and_alloc_skb(&skb, team, pid, send_func);
1843         if (err)
1844                 return err;
1845
1846         hdr = genlmsg_put(skb, pid, seq, &team_nl_family, flags | NLM_F_MULTI,
1847                           TEAM_CMD_OPTIONS_GET);
1848         if (IS_ERR(hdr))
1849                 return PTR_ERR(hdr);
1850
1851         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
1852                 goto nla_put_failure;
1853         option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
1854         if (!option_list)
1855                 goto nla_put_failure;
1856
1857         i = 0;
1858         incomplete = false;
1859         list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
1860                 err = team_nl_fill_one_option_get(skb, team, opt_inst);
1861                 if (err) {
1862                         if (err == -EMSGSIZE) {
1863                                 if (!i)
1864                                         goto errout;
1865                                 incomplete = true;
1866                                 break;
1867                         }
1868                         goto errout;
1869                 }
1870                 i++;
1871         }
1872
1873         nla_nest_end(skb, option_list);
1874         genlmsg_end(skb, hdr);
1875         if (incomplete)
1876                 goto start_again;
1877
1878 send_done:
1879         nlh = nlmsg_put(skb, pid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
1880         if (!nlh) {
1881                 err = __send_and_alloc_skb(&skb, team, pid, send_func);
1882                 if (err)
1883                         goto errout;
1884                 goto send_done;
1885         }
1886
1887         return send_func(skb, team, pid);
1888
1889 nla_put_failure:
1890         err = -EMSGSIZE;
1891 errout:
1892         genlmsg_cancel(skb, hdr);
1893         nlmsg_free(skb);
1894         return err;
1895 }
1896
1897 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
1898 {
1899         struct team *team;
1900         struct team_option_inst *opt_inst;
1901         int err;
1902         LIST_HEAD(sel_opt_inst_list);
1903
1904         team = team_nl_team_get(info);
1905         if (!team)
1906                 return -EINVAL;
1907
1908         list_for_each_entry(opt_inst, &team->option_inst_list, list)
1909                 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
1910         err = team_nl_send_options_get(team, info->snd_pid, info->snd_seq,
1911                                        NLM_F_ACK, team_nl_send_unicast,
1912                                        &sel_opt_inst_list);
1913
1914         team_nl_team_put(team);
1915
1916         return err;
1917 }
1918
1919 static int team_nl_send_event_options_get(struct team *team,
1920                                           struct list_head *sel_opt_inst_list);
1921
1922 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
1923 {
1924         struct team *team;
1925         int err = 0;
1926         int i;
1927         struct nlattr *nl_option;
1928         LIST_HEAD(opt_inst_list);
1929
1930         team = team_nl_team_get(info);
1931         if (!team)
1932                 return -EINVAL;
1933
1934         err = -EINVAL;
1935         if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
1936                 err = -EINVAL;
1937                 goto team_put;
1938         }
1939
1940         nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
1941                 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
1942                 struct nlattr *attr;
1943                 struct nlattr *attr_data;
1944                 enum team_option_type opt_type;
1945                 int opt_port_ifindex = 0; /* != 0 for per-port options */
1946                 u32 opt_array_index = 0;
1947                 bool opt_is_array = false;
1948                 struct team_option_inst *opt_inst;
1949                 char *opt_name;
1950                 bool opt_found = false;
1951
1952                 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
1953                         err = -EINVAL;
1954                         goto team_put;
1955                 }
1956                 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
1957                                        nl_option, team_nl_option_policy);
1958                 if (err)
1959                         goto team_put;
1960                 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
1961                     !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
1962                         err = -EINVAL;
1963                         goto team_put;
1964                 }
1965                 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
1966                 case NLA_U32:
1967                         opt_type = TEAM_OPTION_TYPE_U32;
1968                         break;
1969                 case NLA_STRING:
1970                         opt_type = TEAM_OPTION_TYPE_STRING;
1971                         break;
1972                 case NLA_BINARY:
1973                         opt_type = TEAM_OPTION_TYPE_BINARY;
1974                         break;
1975                 case NLA_FLAG:
1976                         opt_type = TEAM_OPTION_TYPE_BOOL;
1977                         break;
1978                 default:
1979                         goto team_put;
1980                 }
1981
1982                 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
1983                 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
1984                         err = -EINVAL;
1985                         goto team_put;
1986                 }
1987
1988                 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
1989                 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
1990                 if (attr)
1991                         opt_port_ifindex = nla_get_u32(attr);
1992
1993                 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
1994                 if (attr) {
1995                         opt_is_array = true;
1996                         opt_array_index = nla_get_u32(attr);
1997                 }
1998
1999                 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2000                         struct team_option *option = opt_inst->option;
2001                         struct team_gsetter_ctx ctx;
2002                         struct team_option_inst_info *opt_inst_info;
2003                         int tmp_ifindex;
2004
2005                         opt_inst_info = &opt_inst->info;
2006                         tmp_ifindex = opt_inst_info->port ?
2007                                       opt_inst_info->port->dev->ifindex : 0;
2008                         if (option->type != opt_type ||
2009                             strcmp(option->name, opt_name) ||
2010                             tmp_ifindex != opt_port_ifindex ||
2011                             (option->array_size && !opt_is_array) ||
2012                             opt_inst_info->array_index != opt_array_index)
2013                                 continue;
2014                         opt_found = true;
2015                         ctx.info = opt_inst_info;
2016                         switch (opt_type) {
2017                         case TEAM_OPTION_TYPE_U32:
2018                                 ctx.data.u32_val = nla_get_u32(attr_data);
2019                                 break;
2020                         case TEAM_OPTION_TYPE_STRING:
2021                                 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2022                                         err = -EINVAL;
2023                                         goto team_put;
2024                                 }
2025                                 ctx.data.str_val = nla_data(attr_data);
2026                                 break;
2027                         case TEAM_OPTION_TYPE_BINARY:
2028                                 ctx.data.bin_val.len = nla_len(attr_data);
2029                                 ctx.data.bin_val.ptr = nla_data(attr_data);
2030                                 break;
2031                         case TEAM_OPTION_TYPE_BOOL:
2032                                 ctx.data.bool_val = attr_data ? true : false;
2033                                 break;
2034                         default:
2035                                 BUG();
2036                         }
2037                         err = team_option_set(team, opt_inst, &ctx);
2038                         if (err)
2039                                 goto team_put;
2040                         opt_inst->changed = true;
2041                         list_add(&opt_inst->tmp_list, &opt_inst_list);
2042                 }
2043                 if (!opt_found) {
2044                         err = -ENOENT;
2045                         goto team_put;
2046                 }
2047         }
2048
2049         err = team_nl_send_event_options_get(team, &opt_inst_list);
2050
2051 team_put:
2052         team_nl_team_put(team);
2053
2054         return err;
2055 }
2056
2057 static int team_nl_fill_port_list_get(struct sk_buff *skb,
2058                                       u32 pid, u32 seq, int flags,
2059                                       struct team *team,
2060                                       bool fillall)
2061 {
2062         struct nlattr *port_list;
2063         void *hdr;
2064         struct team_port *port;
2065
2066         hdr = genlmsg_put(skb, pid, seq, &team_nl_family, flags,
2067                           TEAM_CMD_PORT_LIST_GET);
2068         if (IS_ERR(hdr))
2069                 return PTR_ERR(hdr);
2070
2071         if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2072                 goto nla_put_failure;
2073         port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2074         if (!port_list)
2075                 goto nla_put_failure;
2076
2077         list_for_each_entry(port, &team->port_list, list) {
2078                 struct nlattr *port_item;
2079
2080                 /* Include only changed ports if fill all mode is not on */
2081                 if (!fillall && !port->changed)
2082                         continue;
2083                 port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2084                 if (!port_item)
2085                         goto nla_put_failure;
2086                 if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2087                         goto nla_put_failure;
2088                 if (port->changed) {
2089                         if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2090                                 goto nla_put_failure;
2091                         port->changed = false;
2092                 }
2093                 if ((port->removed &&
2094                      nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2095                     (port->state.linkup &&
2096                      nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2097                     nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2098                     nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2099                         goto nla_put_failure;
2100                 nla_nest_end(skb, port_item);
2101         }
2102
2103         nla_nest_end(skb, port_list);
2104         return genlmsg_end(skb, hdr);
2105
2106 nla_put_failure:
2107         genlmsg_cancel(skb, hdr);
2108         return -EMSGSIZE;
2109 }
2110
2111 static int team_nl_fill_port_list_get_all(struct sk_buff *skb,
2112                                           struct genl_info *info, int flags,
2113                                           struct team *team)
2114 {
2115         return team_nl_fill_port_list_get(skb, info->snd_pid,
2116                                           info->snd_seq, NLM_F_ACK,
2117                                           team, true);
2118 }
2119
2120 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2121                                      struct genl_info *info)
2122 {
2123         struct team *team;
2124         int err;
2125
2126         team = team_nl_team_get(info);
2127         if (!team)
2128                 return -EINVAL;
2129
2130         err = team_nl_send_generic(info, team, team_nl_fill_port_list_get_all);
2131
2132         team_nl_team_put(team);
2133
2134         return err;
2135 }
2136
2137 static struct genl_ops team_nl_ops[] = {
2138         {
2139                 .cmd = TEAM_CMD_NOOP,
2140                 .doit = team_nl_cmd_noop,
2141                 .policy = team_nl_policy,
2142         },
2143         {
2144                 .cmd = TEAM_CMD_OPTIONS_SET,
2145                 .doit = team_nl_cmd_options_set,
2146                 .policy = team_nl_policy,
2147                 .flags = GENL_ADMIN_PERM,
2148         },
2149         {
2150                 .cmd = TEAM_CMD_OPTIONS_GET,
2151                 .doit = team_nl_cmd_options_get,
2152                 .policy = team_nl_policy,
2153                 .flags = GENL_ADMIN_PERM,
2154         },
2155         {
2156                 .cmd = TEAM_CMD_PORT_LIST_GET,
2157                 .doit = team_nl_cmd_port_list_get,
2158                 .policy = team_nl_policy,
2159                 .flags = GENL_ADMIN_PERM,
2160         },
2161 };
2162
2163 static struct genl_multicast_group team_change_event_mcgrp = {
2164         .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME,
2165 };
2166
2167 static int team_nl_send_multicast(struct sk_buff *skb,
2168                                   struct team *team, u32 pid)
2169 {
2170         return genlmsg_multicast_netns(dev_net(team->dev), skb, 0,
2171                                        team_change_event_mcgrp.id, GFP_KERNEL);
2172 }
2173
2174 static int team_nl_send_event_options_get(struct team *team,
2175                                           struct list_head *sel_opt_inst_list)
2176 {
2177         return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2178                                         sel_opt_inst_list);
2179 }
2180
2181 static int team_nl_send_event_port_list_get(struct team *team)
2182 {
2183         struct sk_buff *skb;
2184         int err;
2185         struct net *net = dev_net(team->dev);
2186
2187         skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2188         if (!skb)
2189                 return -ENOMEM;
2190
2191         err = team_nl_fill_port_list_get(skb, 0, 0, 0, team, false);
2192         if (err < 0)
2193                 goto err_fill;
2194
2195         err = genlmsg_multicast_netns(net, skb, 0, team_change_event_mcgrp.id,
2196                                       GFP_KERNEL);
2197         return err;
2198
2199 err_fill:
2200         nlmsg_free(skb);
2201         return err;
2202 }
2203
2204 static int team_nl_init(void)
2205 {
2206         int err;
2207
2208         err = genl_register_family_with_ops(&team_nl_family, team_nl_ops,
2209                                             ARRAY_SIZE(team_nl_ops));
2210         if (err)
2211                 return err;
2212
2213         err = genl_register_mc_group(&team_nl_family, &team_change_event_mcgrp);
2214         if (err)
2215                 goto err_change_event_grp_reg;
2216
2217         return 0;
2218
2219 err_change_event_grp_reg:
2220         genl_unregister_family(&team_nl_family);
2221
2222         return err;
2223 }
2224
2225 static void team_nl_fini(void)
2226 {
2227         genl_unregister_family(&team_nl_family);
2228 }
2229
2230
2231 /******************
2232  * Change checkers
2233  ******************/
2234
2235 static void __team_options_change_check(struct team *team)
2236 {
2237         int err;
2238         struct team_option_inst *opt_inst;
2239         LIST_HEAD(sel_opt_inst_list);
2240
2241         list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2242                 if (opt_inst->changed)
2243                         list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2244         }
2245         err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2246         if (err)
2247                 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2248                             err);
2249 }
2250
2251 /* rtnl lock is held */
2252 static void __team_port_change_check(struct team_port *port, bool linkup)
2253 {
2254         int err;
2255
2256         if (!port->removed && port->state.linkup == linkup)
2257                 return;
2258
2259         port->changed = true;
2260         port->state.linkup = linkup;
2261         team_refresh_port_linkup(port);
2262         if (linkup) {
2263                 struct ethtool_cmd ecmd;
2264
2265                 err = __ethtool_get_settings(port->dev, &ecmd);
2266                 if (!err) {
2267                         port->state.speed = ethtool_cmd_speed(&ecmd);
2268                         port->state.duplex = ecmd.duplex;
2269                         goto send_event;
2270                 }
2271         }
2272         port->state.speed = 0;
2273         port->state.duplex = 0;
2274
2275 send_event:
2276         err = team_nl_send_event_port_list_get(port->team);
2277         if (err)
2278                 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink\n",
2279                             port->dev->name);
2280
2281 }
2282
2283 static void team_port_change_check(struct team_port *port, bool linkup)
2284 {
2285         struct team *team = port->team;
2286
2287         mutex_lock(&team->lock);
2288         __team_port_change_check(port, linkup);
2289         mutex_unlock(&team->lock);
2290 }
2291
2292
2293 /************************************
2294  * Net device notifier event handler
2295  ************************************/
2296
2297 static int team_device_event(struct notifier_block *unused,
2298                              unsigned long event, void *ptr)
2299 {
2300         struct net_device *dev = (struct net_device *) ptr;
2301         struct team_port *port;
2302
2303         port = team_port_get_rtnl(dev);
2304         if (!port)
2305                 return NOTIFY_DONE;
2306
2307         switch (event) {
2308         case NETDEV_UP:
2309                 if (netif_carrier_ok(dev))
2310                         team_port_change_check(port, true);
2311         case NETDEV_DOWN:
2312                 team_port_change_check(port, false);
2313         case NETDEV_CHANGE:
2314                 if (netif_running(port->dev))
2315                         team_port_change_check(port,
2316                                                !!netif_carrier_ok(port->dev));
2317                 break;
2318         case NETDEV_UNREGISTER:
2319                 team_del_slave(port->team->dev, dev);
2320                 break;
2321         case NETDEV_FEAT_CHANGE:
2322                 team_compute_features(port->team);
2323                 break;
2324         case NETDEV_CHANGEMTU:
2325                 /* Forbid to change mtu of underlaying device */
2326                 return NOTIFY_BAD;
2327         case NETDEV_PRE_TYPE_CHANGE:
2328                 /* Forbid to change type of underlaying device */
2329                 return NOTIFY_BAD;
2330         }
2331         return NOTIFY_DONE;
2332 }
2333
2334 static struct notifier_block team_notifier_block __read_mostly = {
2335         .notifier_call = team_device_event,
2336 };
2337
2338
2339 /***********************
2340  * Module init and exit
2341  ***********************/
2342
2343 static int __init team_module_init(void)
2344 {
2345         int err;
2346
2347         register_netdevice_notifier(&team_notifier_block);
2348
2349         err = rtnl_link_register(&team_link_ops);
2350         if (err)
2351                 goto err_rtnl_reg;
2352
2353         err = team_nl_init();
2354         if (err)
2355                 goto err_nl_init;
2356
2357         return 0;
2358
2359 err_nl_init:
2360         rtnl_link_unregister(&team_link_ops);
2361
2362 err_rtnl_reg:
2363         unregister_netdevice_notifier(&team_notifier_block);
2364
2365         return err;
2366 }
2367
2368 static void __exit team_module_exit(void)
2369 {
2370         team_nl_fini();
2371         rtnl_link_unregister(&team_link_ops);
2372         unregister_netdevice_notifier(&team_notifier_block);
2373 }
2374
2375 module_init(team_module_init);
2376 module_exit(team_module_exit);
2377
2378 MODULE_LICENSE("GPL v2");
2379 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
2380 MODULE_DESCRIPTION("Ethernet team device driver");
2381 MODULE_ALIAS_RTNL_LINK(DRV_NAME);