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net: vlan: rename NETIF_F_HW_VLAN_* feature flags to NETIF_F_HW_VLAN_CTAG_*
[deliverable/linux.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 <generated/utsrelease.h>
32 #include <linux/if_team.h>
33
34 #define DRV_NAME "team"
35
36
37 /**********
38 * Helpers
39 **********/
40
41 #define team_port_exists(dev) (dev->priv_flags & IFF_TEAM_PORT)
42
43 static struct team_port *team_port_get_rcu(const struct net_device *dev)
44 {
45 struct team_port *port = rcu_dereference(dev->rx_handler_data);
46
47 return team_port_exists(dev) ? port : NULL;
48 }
49
50 static struct team_port *team_port_get_rtnl(const struct net_device *dev)
51 {
52 struct team_port *port = rtnl_dereference(dev->rx_handler_data);
53
54 return team_port_exists(dev) ? port : NULL;
55 }
56
57 /*
58 * Since the ability to change device address for open port device is tested in
59 * team_port_add, this function can be called without control of return value
60 */
61 static int __set_port_dev_addr(struct net_device *port_dev,
62 const unsigned char *dev_addr)
63 {
64 struct sockaddr addr;
65
66 memcpy(addr.sa_data, dev_addr, port_dev->addr_len);
67 addr.sa_family = port_dev->type;
68 return dev_set_mac_address(port_dev, &addr);
69 }
70
71 static int team_port_set_orig_dev_addr(struct team_port *port)
72 {
73 return __set_port_dev_addr(port->dev, port->orig.dev_addr);
74 }
75
76 static int team_port_set_team_dev_addr(struct team *team,
77 struct team_port *port)
78 {
79 return __set_port_dev_addr(port->dev, team->dev->dev_addr);
80 }
81
82 int team_modeop_port_enter(struct team *team, struct team_port *port)
83 {
84 return team_port_set_team_dev_addr(team, port);
85 }
86 EXPORT_SYMBOL(team_modeop_port_enter);
87
88 void team_modeop_port_change_dev_addr(struct team *team,
89 struct team_port *port)
90 {
91 team_port_set_team_dev_addr(team, port);
92 }
93 EXPORT_SYMBOL(team_modeop_port_change_dev_addr);
94
95 static void team_refresh_port_linkup(struct team_port *port)
96 {
97 port->linkup = port->user.linkup_enabled ? port->user.linkup :
98 port->state.linkup;
99 }
100
101
102 /*******************
103 * Options handling
104 *******************/
105
106 struct team_option_inst { /* One for each option instance */
107 struct list_head list;
108 struct list_head tmp_list;
109 struct team_option *option;
110 struct team_option_inst_info info;
111 bool changed;
112 bool removed;
113 };
114
115 static struct team_option *__team_find_option(struct team *team,
116 const char *opt_name)
117 {
118 struct team_option *option;
119
120 list_for_each_entry(option, &team->option_list, list) {
121 if (strcmp(option->name, opt_name) == 0)
122 return option;
123 }
124 return NULL;
125 }
126
127 static void __team_option_inst_del(struct team_option_inst *opt_inst)
128 {
129 list_del(&opt_inst->list);
130 kfree(opt_inst);
131 }
132
133 static void __team_option_inst_del_option(struct team *team,
134 struct team_option *option)
135 {
136 struct team_option_inst *opt_inst, *tmp;
137
138 list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
139 if (opt_inst->option == option)
140 __team_option_inst_del(opt_inst);
141 }
142 }
143
144 static int __team_option_inst_add(struct team *team, struct team_option *option,
145 struct team_port *port)
146 {
147 struct team_option_inst *opt_inst;
148 unsigned int array_size;
149 unsigned int i;
150 int err;
151
152 array_size = option->array_size;
153 if (!array_size)
154 array_size = 1; /* No array but still need one instance */
155
156 for (i = 0; i < array_size; i++) {
157 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL);
158 if (!opt_inst)
159 return -ENOMEM;
160 opt_inst->option = option;
161 opt_inst->info.port = port;
162 opt_inst->info.array_index = i;
163 opt_inst->changed = true;
164 opt_inst->removed = false;
165 list_add_tail(&opt_inst->list, &team->option_inst_list);
166 if (option->init) {
167 err = option->init(team, &opt_inst->info);
168 if (err)
169 return err;
170 }
171
172 }
173 return 0;
174 }
175
176 static int __team_option_inst_add_option(struct team *team,
177 struct team_option *option)
178 {
179 struct team_port *port;
180 int err;
181
182 if (!option->per_port) {
183 err = __team_option_inst_add(team, option, NULL);
184 if (err)
185 goto inst_del_option;
186 }
187
188 list_for_each_entry(port, &team->port_list, list) {
189 err = __team_option_inst_add(team, option, port);
190 if (err)
191 goto inst_del_option;
192 }
193 return 0;
194
195 inst_del_option:
196 __team_option_inst_del_option(team, option);
197 return err;
198 }
199
200 static void __team_option_inst_mark_removed_option(struct team *team,
201 struct team_option *option)
202 {
203 struct team_option_inst *opt_inst;
204
205 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
206 if (opt_inst->option == option) {
207 opt_inst->changed = true;
208 opt_inst->removed = true;
209 }
210 }
211 }
212
213 static void __team_option_inst_del_port(struct team *team,
214 struct team_port *port)
215 {
216 struct team_option_inst *opt_inst, *tmp;
217
218 list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
219 if (opt_inst->option->per_port &&
220 opt_inst->info.port == port)
221 __team_option_inst_del(opt_inst);
222 }
223 }
224
225 static int __team_option_inst_add_port(struct team *team,
226 struct team_port *port)
227 {
228 struct team_option *option;
229 int err;
230
231 list_for_each_entry(option, &team->option_list, list) {
232 if (!option->per_port)
233 continue;
234 err = __team_option_inst_add(team, option, port);
235 if (err)
236 goto inst_del_port;
237 }
238 return 0;
239
240 inst_del_port:
241 __team_option_inst_del_port(team, port);
242 return err;
243 }
244
245 static void __team_option_inst_mark_removed_port(struct team *team,
246 struct team_port *port)
247 {
248 struct team_option_inst *opt_inst;
249
250 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
251 if (opt_inst->info.port == port) {
252 opt_inst->changed = true;
253 opt_inst->removed = true;
254 }
255 }
256 }
257
258 static int __team_options_register(struct team *team,
259 const struct team_option *option,
260 size_t option_count)
261 {
262 int i;
263 struct team_option **dst_opts;
264 int err;
265
266 dst_opts = kzalloc(sizeof(struct team_option *) * option_count,
267 GFP_KERNEL);
268 if (!dst_opts)
269 return -ENOMEM;
270 for (i = 0; i < option_count; i++, option++) {
271 if (__team_find_option(team, option->name)) {
272 err = -EEXIST;
273 goto alloc_rollback;
274 }
275 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
276 if (!dst_opts[i]) {
277 err = -ENOMEM;
278 goto alloc_rollback;
279 }
280 }
281
282 for (i = 0; i < option_count; i++) {
283 err = __team_option_inst_add_option(team, dst_opts[i]);
284 if (err)
285 goto inst_rollback;
286 list_add_tail(&dst_opts[i]->list, &team->option_list);
287 }
288
289 kfree(dst_opts);
290 return 0;
291
292 inst_rollback:
293 for (i--; i >= 0; i--)
294 __team_option_inst_del_option(team, dst_opts[i]);
295
296 i = option_count - 1;
297 alloc_rollback:
298 for (i--; i >= 0; i--)
299 kfree(dst_opts[i]);
300
301 kfree(dst_opts);
302 return err;
303 }
304
305 static void __team_options_mark_removed(struct team *team,
306 const struct team_option *option,
307 size_t option_count)
308 {
309 int i;
310
311 for (i = 0; i < option_count; i++, option++) {
312 struct team_option *del_opt;
313
314 del_opt = __team_find_option(team, option->name);
315 if (del_opt)
316 __team_option_inst_mark_removed_option(team, del_opt);
317 }
318 }
319
320 static void __team_options_unregister(struct team *team,
321 const struct team_option *option,
322 size_t option_count)
323 {
324 int i;
325
326 for (i = 0; i < option_count; i++, option++) {
327 struct team_option *del_opt;
328
329 del_opt = __team_find_option(team, option->name);
330 if (del_opt) {
331 __team_option_inst_del_option(team, del_opt);
332 list_del(&del_opt->list);
333 kfree(del_opt);
334 }
335 }
336 }
337
338 static void __team_options_change_check(struct team *team);
339
340 int team_options_register(struct team *team,
341 const struct team_option *option,
342 size_t option_count)
343 {
344 int err;
345
346 err = __team_options_register(team, option, option_count);
347 if (err)
348 return err;
349 __team_options_change_check(team);
350 return 0;
351 }
352 EXPORT_SYMBOL(team_options_register);
353
354 void team_options_unregister(struct team *team,
355 const struct team_option *option,
356 size_t option_count)
357 {
358 __team_options_mark_removed(team, option, option_count);
359 __team_options_change_check(team);
360 __team_options_unregister(team, option, option_count);
361 }
362 EXPORT_SYMBOL(team_options_unregister);
363
364 static int team_option_get(struct team *team,
365 struct team_option_inst *opt_inst,
366 struct team_gsetter_ctx *ctx)
367 {
368 if (!opt_inst->option->getter)
369 return -EOPNOTSUPP;
370 return opt_inst->option->getter(team, ctx);
371 }
372
373 static int team_option_set(struct team *team,
374 struct team_option_inst *opt_inst,
375 struct team_gsetter_ctx *ctx)
376 {
377 if (!opt_inst->option->setter)
378 return -EOPNOTSUPP;
379 return opt_inst->option->setter(team, ctx);
380 }
381
382 void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info)
383 {
384 struct team_option_inst *opt_inst;
385
386 opt_inst = container_of(opt_inst_info, struct team_option_inst, info);
387 opt_inst->changed = true;
388 }
389 EXPORT_SYMBOL(team_option_inst_set_change);
390
391 void team_options_change_check(struct team *team)
392 {
393 __team_options_change_check(team);
394 }
395 EXPORT_SYMBOL(team_options_change_check);
396
397
398 /****************
399 * Mode handling
400 ****************/
401
402 static LIST_HEAD(mode_list);
403 static DEFINE_SPINLOCK(mode_list_lock);
404
405 struct team_mode_item {
406 struct list_head list;
407 const struct team_mode *mode;
408 };
409
410 static struct team_mode_item *__find_mode(const char *kind)
411 {
412 struct team_mode_item *mitem;
413
414 list_for_each_entry(mitem, &mode_list, list) {
415 if (strcmp(mitem->mode->kind, kind) == 0)
416 return mitem;
417 }
418 return NULL;
419 }
420
421 static bool is_good_mode_name(const char *name)
422 {
423 while (*name != '\0') {
424 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
425 return false;
426 name++;
427 }
428 return true;
429 }
430
431 int team_mode_register(const struct team_mode *mode)
432 {
433 int err = 0;
434 struct team_mode_item *mitem;
435
436 if (!is_good_mode_name(mode->kind) ||
437 mode->priv_size > TEAM_MODE_PRIV_SIZE)
438 return -EINVAL;
439
440 mitem = kmalloc(sizeof(*mitem), GFP_KERNEL);
441 if (!mitem)
442 return -ENOMEM;
443
444 spin_lock(&mode_list_lock);
445 if (__find_mode(mode->kind)) {
446 err = -EEXIST;
447 kfree(mitem);
448 goto unlock;
449 }
450 mitem->mode = mode;
451 list_add_tail(&mitem->list, &mode_list);
452 unlock:
453 spin_unlock(&mode_list_lock);
454 return err;
455 }
456 EXPORT_SYMBOL(team_mode_register);
457
458 void team_mode_unregister(const struct team_mode *mode)
459 {
460 struct team_mode_item *mitem;
461
462 spin_lock(&mode_list_lock);
463 mitem = __find_mode(mode->kind);
464 if (mitem) {
465 list_del_init(&mitem->list);
466 kfree(mitem);
467 }
468 spin_unlock(&mode_list_lock);
469 }
470 EXPORT_SYMBOL(team_mode_unregister);
471
472 static const struct team_mode *team_mode_get(const char *kind)
473 {
474 struct team_mode_item *mitem;
475 const struct team_mode *mode = NULL;
476
477 spin_lock(&mode_list_lock);
478 mitem = __find_mode(kind);
479 if (!mitem) {
480 spin_unlock(&mode_list_lock);
481 request_module("team-mode-%s", kind);
482 spin_lock(&mode_list_lock);
483 mitem = __find_mode(kind);
484 }
485 if (mitem) {
486 mode = mitem->mode;
487 if (!try_module_get(mode->owner))
488 mode = NULL;
489 }
490
491 spin_unlock(&mode_list_lock);
492 return mode;
493 }
494
495 static void team_mode_put(const struct team_mode *mode)
496 {
497 module_put(mode->owner);
498 }
499
500 static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
501 {
502 dev_kfree_skb_any(skb);
503 return false;
504 }
505
506 static rx_handler_result_t team_dummy_receive(struct team *team,
507 struct team_port *port,
508 struct sk_buff *skb)
509 {
510 return RX_HANDLER_ANOTHER;
511 }
512
513 static const struct team_mode __team_no_mode = {
514 .kind = "*NOMODE*",
515 };
516
517 static bool team_is_mode_set(struct team *team)
518 {
519 return team->mode != &__team_no_mode;
520 }
521
522 static void team_set_no_mode(struct team *team)
523 {
524 team->user_carrier_enabled = false;
525 team->mode = &__team_no_mode;
526 }
527
528 static void __team_adjust_ops(struct team *team, int en_port_count)
529 {
530 /*
531 * To avoid checks in rx/tx skb paths, ensure here that non-null and
532 * correct ops are always set.
533 */
534
535 if (!en_port_count || !team_is_mode_set(team) ||
536 !team->mode->ops->transmit)
537 team->ops.transmit = team_dummy_transmit;
538 else
539 team->ops.transmit = team->mode->ops->transmit;
540
541 if (!en_port_count || !team_is_mode_set(team) ||
542 !team->mode->ops->receive)
543 team->ops.receive = team_dummy_receive;
544 else
545 team->ops.receive = team->mode->ops->receive;
546 }
547
548 static void team_adjust_ops(struct team *team)
549 {
550 __team_adjust_ops(team, team->en_port_count);
551 }
552
553 /*
554 * We can benefit from the fact that it's ensured no port is present
555 * at the time of mode change. Therefore no packets are in fly so there's no
556 * need to set mode operations in any special way.
557 */
558 static int __team_change_mode(struct team *team,
559 const struct team_mode *new_mode)
560 {
561 /* Check if mode was previously set and do cleanup if so */
562 if (team_is_mode_set(team)) {
563 void (*exit_op)(struct team *team) = team->ops.exit;
564
565 /* Clear ops area so no callback is called any longer */
566 memset(&team->ops, 0, sizeof(struct team_mode_ops));
567 team_adjust_ops(team);
568
569 if (exit_op)
570 exit_op(team);
571 team_mode_put(team->mode);
572 team_set_no_mode(team);
573 /* zero private data area */
574 memset(&team->mode_priv, 0,
575 sizeof(struct team) - offsetof(struct team, mode_priv));
576 }
577
578 if (!new_mode)
579 return 0;
580
581 if (new_mode->ops->init) {
582 int err;
583
584 err = new_mode->ops->init(team);
585 if (err)
586 return err;
587 }
588
589 team->mode = new_mode;
590 memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
591 team_adjust_ops(team);
592
593 return 0;
594 }
595
596 static int team_change_mode(struct team *team, const char *kind)
597 {
598 const struct team_mode *new_mode;
599 struct net_device *dev = team->dev;
600 int err;
601
602 if (!list_empty(&team->port_list)) {
603 netdev_err(dev, "No ports can be present during mode change\n");
604 return -EBUSY;
605 }
606
607 if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) {
608 netdev_err(dev, "Unable to change to the same mode the team is in\n");
609 return -EINVAL;
610 }
611
612 new_mode = team_mode_get(kind);
613 if (!new_mode) {
614 netdev_err(dev, "Mode \"%s\" not found\n", kind);
615 return -EINVAL;
616 }
617
618 err = __team_change_mode(team, new_mode);
619 if (err) {
620 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
621 team_mode_put(new_mode);
622 return err;
623 }
624
625 netdev_info(dev, "Mode changed to \"%s\"\n", kind);
626 return 0;
627 }
628
629
630 /************************
631 * Rx path frame handler
632 ************************/
633
634 /* note: already called with rcu_read_lock */
635 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
636 {
637 struct sk_buff *skb = *pskb;
638 struct team_port *port;
639 struct team *team;
640 rx_handler_result_t res;
641
642 skb = skb_share_check(skb, GFP_ATOMIC);
643 if (!skb)
644 return RX_HANDLER_CONSUMED;
645
646 *pskb = skb;
647
648 port = team_port_get_rcu(skb->dev);
649 team = port->team;
650 if (!team_port_enabled(port)) {
651 /* allow exact match delivery for disabled ports */
652 res = RX_HANDLER_EXACT;
653 } else {
654 res = team->ops.receive(team, port, skb);
655 }
656 if (res == RX_HANDLER_ANOTHER) {
657 struct team_pcpu_stats *pcpu_stats;
658
659 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
660 u64_stats_update_begin(&pcpu_stats->syncp);
661 pcpu_stats->rx_packets++;
662 pcpu_stats->rx_bytes += skb->len;
663 if (skb->pkt_type == PACKET_MULTICAST)
664 pcpu_stats->rx_multicast++;
665 u64_stats_update_end(&pcpu_stats->syncp);
666
667 skb->dev = team->dev;
668 } else {
669 this_cpu_inc(team->pcpu_stats->rx_dropped);
670 }
671
672 return res;
673 }
674
675
676 /*************************************
677 * Multiqueue Tx port select override
678 *************************************/
679
680 static int team_queue_override_init(struct team *team)
681 {
682 struct list_head *listarr;
683 unsigned int queue_cnt = team->dev->num_tx_queues - 1;
684 unsigned int i;
685
686 if (!queue_cnt)
687 return 0;
688 listarr = kmalloc(sizeof(struct list_head) * queue_cnt, GFP_KERNEL);
689 if (!listarr)
690 return -ENOMEM;
691 team->qom_lists = listarr;
692 for (i = 0; i < queue_cnt; i++)
693 INIT_LIST_HEAD(listarr++);
694 return 0;
695 }
696
697 static void team_queue_override_fini(struct team *team)
698 {
699 kfree(team->qom_lists);
700 }
701
702 static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
703 {
704 return &team->qom_lists[queue_id - 1];
705 }
706
707 /*
708 * note: already called with rcu_read_lock
709 */
710 static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
711 {
712 struct list_head *qom_list;
713 struct team_port *port;
714
715 if (!team->queue_override_enabled || !skb->queue_mapping)
716 return false;
717 qom_list = __team_get_qom_list(team, skb->queue_mapping);
718 list_for_each_entry_rcu(port, qom_list, qom_list) {
719 if (!team_dev_queue_xmit(team, port, skb))
720 return true;
721 }
722 return false;
723 }
724
725 static void __team_queue_override_port_del(struct team *team,
726 struct team_port *port)
727 {
728 list_del_rcu(&port->qom_list);
729 synchronize_rcu();
730 INIT_LIST_HEAD(&port->qom_list);
731 }
732
733 static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
734 struct team_port *cur)
735 {
736 if (port->priority < cur->priority)
737 return true;
738 if (port->priority > cur->priority)
739 return false;
740 if (port->index < cur->index)
741 return true;
742 return false;
743 }
744
745 static void __team_queue_override_port_add(struct team *team,
746 struct team_port *port)
747 {
748 struct team_port *cur;
749 struct list_head *qom_list;
750 struct list_head *node;
751
752 if (!port->queue_id || !team_port_enabled(port))
753 return;
754
755 qom_list = __team_get_qom_list(team, port->queue_id);
756 node = qom_list;
757 list_for_each_entry(cur, qom_list, qom_list) {
758 if (team_queue_override_port_has_gt_prio_than(port, cur))
759 break;
760 node = &cur->qom_list;
761 }
762 list_add_tail_rcu(&port->qom_list, node);
763 }
764
765 static void __team_queue_override_enabled_check(struct team *team)
766 {
767 struct team_port *port;
768 bool enabled = false;
769
770 list_for_each_entry(port, &team->port_list, list) {
771 if (!list_empty(&port->qom_list)) {
772 enabled = true;
773 break;
774 }
775 }
776 if (enabled == team->queue_override_enabled)
777 return;
778 netdev_dbg(team->dev, "%s queue override\n",
779 enabled ? "Enabling" : "Disabling");
780 team->queue_override_enabled = enabled;
781 }
782
783 static void team_queue_override_port_refresh(struct team *team,
784 struct team_port *port)
785 {
786 __team_queue_override_port_del(team, port);
787 __team_queue_override_port_add(team, port);
788 __team_queue_override_enabled_check(team);
789 }
790
791
792 /****************
793 * Port handling
794 ****************/
795
796 static bool team_port_find(const struct team *team,
797 const struct team_port *port)
798 {
799 struct team_port *cur;
800
801 list_for_each_entry(cur, &team->port_list, list)
802 if (cur == port)
803 return true;
804 return false;
805 }
806
807 /*
808 * Enable/disable port by adding to enabled port hashlist and setting
809 * port->index (Might be racy so reader could see incorrect ifindex when
810 * processing a flying packet, but that is not a problem). Write guarded
811 * by team->lock.
812 */
813 static void team_port_enable(struct team *team,
814 struct team_port *port)
815 {
816 if (team_port_enabled(port))
817 return;
818 port->index = team->en_port_count++;
819 hlist_add_head_rcu(&port->hlist,
820 team_port_index_hash(team, port->index));
821 team_adjust_ops(team);
822 team_queue_override_port_refresh(team, port);
823 if (team->ops.port_enabled)
824 team->ops.port_enabled(team, port);
825 }
826
827 static void __reconstruct_port_hlist(struct team *team, int rm_index)
828 {
829 int i;
830 struct team_port *port;
831
832 for (i = rm_index + 1; i < team->en_port_count; i++) {
833 port = team_get_port_by_index(team, i);
834 hlist_del_rcu(&port->hlist);
835 port->index--;
836 hlist_add_head_rcu(&port->hlist,
837 team_port_index_hash(team, port->index));
838 }
839 }
840
841 static void team_port_disable(struct team *team,
842 struct team_port *port)
843 {
844 if (!team_port_enabled(port))
845 return;
846 if (team->ops.port_disabled)
847 team->ops.port_disabled(team, port);
848 hlist_del_rcu(&port->hlist);
849 __reconstruct_port_hlist(team, port->index);
850 port->index = -1;
851 team_queue_override_port_refresh(team, port);
852 __team_adjust_ops(team, team->en_port_count - 1);
853 /*
854 * Wait until readers see adjusted ops. This ensures that
855 * readers never see team->en_port_count == 0
856 */
857 synchronize_rcu();
858 team->en_port_count--;
859 }
860
861 #define TEAM_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \
862 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
863 NETIF_F_HIGHDMA | NETIF_F_LRO)
864
865 static void __team_compute_features(struct team *team)
866 {
867 struct team_port *port;
868 u32 vlan_features = TEAM_VLAN_FEATURES;
869 unsigned short max_hard_header_len = ETH_HLEN;
870 unsigned int flags, dst_release_flag = IFF_XMIT_DST_RELEASE;
871
872 list_for_each_entry(port, &team->port_list, list) {
873 vlan_features = netdev_increment_features(vlan_features,
874 port->dev->vlan_features,
875 TEAM_VLAN_FEATURES);
876
877 dst_release_flag &= port->dev->priv_flags;
878 if (port->dev->hard_header_len > max_hard_header_len)
879 max_hard_header_len = port->dev->hard_header_len;
880 }
881
882 team->dev->vlan_features = vlan_features;
883 team->dev->hard_header_len = max_hard_header_len;
884
885 flags = team->dev->priv_flags & ~IFF_XMIT_DST_RELEASE;
886 team->dev->priv_flags = flags | dst_release_flag;
887
888 netdev_change_features(team->dev);
889 }
890
891 static void team_compute_features(struct team *team)
892 {
893 mutex_lock(&team->lock);
894 __team_compute_features(team);
895 mutex_unlock(&team->lock);
896 }
897
898 static int team_port_enter(struct team *team, struct team_port *port)
899 {
900 int err = 0;
901
902 dev_hold(team->dev);
903 port->dev->priv_flags |= IFF_TEAM_PORT;
904 if (team->ops.port_enter) {
905 err = team->ops.port_enter(team, port);
906 if (err) {
907 netdev_err(team->dev, "Device %s failed to enter team mode\n",
908 port->dev->name);
909 goto err_port_enter;
910 }
911 }
912
913 return 0;
914
915 err_port_enter:
916 port->dev->priv_flags &= ~IFF_TEAM_PORT;
917 dev_put(team->dev);
918
919 return err;
920 }
921
922 static void team_port_leave(struct team *team, struct team_port *port)
923 {
924 if (team->ops.port_leave)
925 team->ops.port_leave(team, port);
926 port->dev->priv_flags &= ~IFF_TEAM_PORT;
927 dev_put(team->dev);
928 }
929
930 #ifdef CONFIG_NET_POLL_CONTROLLER
931 static int team_port_enable_netpoll(struct team *team, struct team_port *port,
932 gfp_t gfp)
933 {
934 struct netpoll *np;
935 int err;
936
937 np = kzalloc(sizeof(*np), gfp);
938 if (!np)
939 return -ENOMEM;
940
941 err = __netpoll_setup(np, port->dev, gfp);
942 if (err) {
943 kfree(np);
944 return err;
945 }
946 port->np = np;
947 return err;
948 }
949
950 static void team_port_disable_netpoll(struct team_port *port)
951 {
952 struct netpoll *np = port->np;
953
954 if (!np)
955 return;
956 port->np = NULL;
957
958 /* Wait for transmitting packets to finish before freeing. */
959 synchronize_rcu_bh();
960 __netpoll_cleanup(np);
961 kfree(np);
962 }
963
964 static struct netpoll_info *team_netpoll_info(struct team *team)
965 {
966 return team->dev->npinfo;
967 }
968
969 #else
970 static int team_port_enable_netpoll(struct team *team, struct team_port *port,
971 gfp_t gfp)
972 {
973 return 0;
974 }
975 static void team_port_disable_netpoll(struct team_port *port)
976 {
977 }
978 static struct netpoll_info *team_netpoll_info(struct team *team)
979 {
980 return NULL;
981 }
982 #endif
983
984 static void __team_port_change_port_added(struct team_port *port, bool linkup);
985 static int team_dev_type_check_change(struct net_device *dev,
986 struct net_device *port_dev);
987
988 static int team_port_add(struct team *team, struct net_device *port_dev)
989 {
990 struct net_device *dev = team->dev;
991 struct team_port *port;
992 char *portname = port_dev->name;
993 int err;
994
995 if (port_dev->flags & IFF_LOOPBACK) {
996 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
997 portname);
998 return -EINVAL;
999 }
1000
1001 if (team_port_exists(port_dev)) {
1002 netdev_err(dev, "Device %s is already a port "
1003 "of a team device\n", portname);
1004 return -EBUSY;
1005 }
1006
1007 if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1008 vlan_uses_dev(dev)) {
1009 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1010 portname);
1011 return -EPERM;
1012 }
1013
1014 err = team_dev_type_check_change(dev, port_dev);
1015 if (err)
1016 return err;
1017
1018 if (port_dev->flags & IFF_UP) {
1019 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1020 portname);
1021 return -EBUSY;
1022 }
1023
1024 port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1025 GFP_KERNEL);
1026 if (!port)
1027 return -ENOMEM;
1028
1029 port->dev = port_dev;
1030 port->team = team;
1031 INIT_LIST_HEAD(&port->qom_list);
1032
1033 port->orig.mtu = port_dev->mtu;
1034 err = dev_set_mtu(port_dev, dev->mtu);
1035 if (err) {
1036 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1037 goto err_set_mtu;
1038 }
1039
1040 memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1041
1042 err = team_port_enter(team, port);
1043 if (err) {
1044 netdev_err(dev, "Device %s failed to enter team mode\n",
1045 portname);
1046 goto err_port_enter;
1047 }
1048
1049 err = dev_open(port_dev);
1050 if (err) {
1051 netdev_dbg(dev, "Device %s opening failed\n",
1052 portname);
1053 goto err_dev_open;
1054 }
1055
1056 err = vlan_vids_add_by_dev(port_dev, dev);
1057 if (err) {
1058 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1059 portname);
1060 goto err_vids_add;
1061 }
1062
1063 if (team_netpoll_info(team)) {
1064 err = team_port_enable_netpoll(team, port, GFP_KERNEL);
1065 if (err) {
1066 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1067 portname);
1068 goto err_enable_netpoll;
1069 }
1070 }
1071
1072 err = netdev_master_upper_dev_link(port_dev, dev);
1073 if (err) {
1074 netdev_err(dev, "Device %s failed to set upper link\n",
1075 portname);
1076 goto err_set_upper_link;
1077 }
1078
1079 err = netdev_rx_handler_register(port_dev, team_handle_frame,
1080 port);
1081 if (err) {
1082 netdev_err(dev, "Device %s failed to register rx_handler\n",
1083 portname);
1084 goto err_handler_register;
1085 }
1086
1087 err = __team_option_inst_add_port(team, port);
1088 if (err) {
1089 netdev_err(dev, "Device %s failed to add per-port options\n",
1090 portname);
1091 goto err_option_port_add;
1092 }
1093
1094 port->index = -1;
1095 team_port_enable(team, port);
1096 list_add_tail_rcu(&port->list, &team->port_list);
1097 __team_compute_features(team);
1098 __team_port_change_port_added(port, !!netif_carrier_ok(port_dev));
1099 __team_options_change_check(team);
1100
1101 netdev_info(dev, "Port device %s added\n", portname);
1102
1103 return 0;
1104
1105 err_option_port_add:
1106 netdev_rx_handler_unregister(port_dev);
1107
1108 err_handler_register:
1109 netdev_upper_dev_unlink(port_dev, dev);
1110
1111 err_set_upper_link:
1112 team_port_disable_netpoll(port);
1113
1114 err_enable_netpoll:
1115 vlan_vids_del_by_dev(port_dev, dev);
1116
1117 err_vids_add:
1118 dev_close(port_dev);
1119
1120 err_dev_open:
1121 team_port_leave(team, port);
1122 team_port_set_orig_dev_addr(port);
1123
1124 err_port_enter:
1125 dev_set_mtu(port_dev, port->orig.mtu);
1126
1127 err_set_mtu:
1128 kfree(port);
1129
1130 return err;
1131 }
1132
1133 static void __team_port_change_port_removed(struct team_port *port);
1134
1135 static int team_port_del(struct team *team, struct net_device *port_dev)
1136 {
1137 struct net_device *dev = team->dev;
1138 struct team_port *port;
1139 char *portname = port_dev->name;
1140
1141 port = team_port_get_rtnl(port_dev);
1142 if (!port || !team_port_find(team, port)) {
1143 netdev_err(dev, "Device %s does not act as a port of this team\n",
1144 portname);
1145 return -ENOENT;
1146 }
1147
1148 team_port_disable(team, port);
1149 list_del_rcu(&port->list);
1150 netdev_rx_handler_unregister(port_dev);
1151 netdev_upper_dev_unlink(port_dev, dev);
1152 team_port_disable_netpoll(port);
1153 vlan_vids_del_by_dev(port_dev, dev);
1154 dev_uc_unsync(port_dev, dev);
1155 dev_mc_unsync(port_dev, dev);
1156 dev_close(port_dev);
1157 team_port_leave(team, port);
1158
1159 __team_option_inst_mark_removed_port(team, port);
1160 __team_options_change_check(team);
1161 __team_option_inst_del_port(team, port);
1162 __team_port_change_port_removed(port);
1163
1164 team_port_set_orig_dev_addr(port);
1165 dev_set_mtu(port_dev, port->orig.mtu);
1166 synchronize_rcu();
1167 kfree(port);
1168 netdev_info(dev, "Port device %s removed\n", portname);
1169 __team_compute_features(team);
1170
1171 return 0;
1172 }
1173
1174
1175 /*****************
1176 * Net device ops
1177 *****************/
1178
1179 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1180 {
1181 ctx->data.str_val = team->mode->kind;
1182 return 0;
1183 }
1184
1185 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1186 {
1187 return team_change_mode(team, ctx->data.str_val);
1188 }
1189
1190 static int team_port_en_option_get(struct team *team,
1191 struct team_gsetter_ctx *ctx)
1192 {
1193 struct team_port *port = ctx->info->port;
1194
1195 ctx->data.bool_val = team_port_enabled(port);
1196 return 0;
1197 }
1198
1199 static int team_port_en_option_set(struct team *team,
1200 struct team_gsetter_ctx *ctx)
1201 {
1202 struct team_port *port = ctx->info->port;
1203
1204 if (ctx->data.bool_val)
1205 team_port_enable(team, port);
1206 else
1207 team_port_disable(team, port);
1208 return 0;
1209 }
1210
1211 static int team_user_linkup_option_get(struct team *team,
1212 struct team_gsetter_ctx *ctx)
1213 {
1214 struct team_port *port = ctx->info->port;
1215
1216 ctx->data.bool_val = port->user.linkup;
1217 return 0;
1218 }
1219
1220 static int team_user_linkup_option_set(struct team *team,
1221 struct team_gsetter_ctx *ctx)
1222 {
1223 struct team_port *port = ctx->info->port;
1224
1225 port->user.linkup = ctx->data.bool_val;
1226 team_refresh_port_linkup(port);
1227 return 0;
1228 }
1229
1230 static int team_user_linkup_en_option_get(struct team *team,
1231 struct team_gsetter_ctx *ctx)
1232 {
1233 struct team_port *port = ctx->info->port;
1234
1235 ctx->data.bool_val = port->user.linkup_enabled;
1236 return 0;
1237 }
1238
1239 static int team_user_linkup_en_option_set(struct team *team,
1240 struct team_gsetter_ctx *ctx)
1241 {
1242 struct team_port *port = ctx->info->port;
1243
1244 port->user.linkup_enabled = ctx->data.bool_val;
1245 team_refresh_port_linkup(port);
1246 return 0;
1247 }
1248
1249 static int team_priority_option_get(struct team *team,
1250 struct team_gsetter_ctx *ctx)
1251 {
1252 struct team_port *port = ctx->info->port;
1253
1254 ctx->data.s32_val = port->priority;
1255 return 0;
1256 }
1257
1258 static int team_priority_option_set(struct team *team,
1259 struct team_gsetter_ctx *ctx)
1260 {
1261 struct team_port *port = ctx->info->port;
1262
1263 port->priority = ctx->data.s32_val;
1264 team_queue_override_port_refresh(team, port);
1265 return 0;
1266 }
1267
1268 static int team_queue_id_option_get(struct team *team,
1269 struct team_gsetter_ctx *ctx)
1270 {
1271 struct team_port *port = ctx->info->port;
1272
1273 ctx->data.u32_val = port->queue_id;
1274 return 0;
1275 }
1276
1277 static int team_queue_id_option_set(struct team *team,
1278 struct team_gsetter_ctx *ctx)
1279 {
1280 struct team_port *port = ctx->info->port;
1281
1282 if (port->queue_id == ctx->data.u32_val)
1283 return 0;
1284 if (ctx->data.u32_val >= team->dev->real_num_tx_queues)
1285 return -EINVAL;
1286 port->queue_id = ctx->data.u32_val;
1287 team_queue_override_port_refresh(team, port);
1288 return 0;
1289 }
1290
1291
1292 static const struct team_option team_options[] = {
1293 {
1294 .name = "mode",
1295 .type = TEAM_OPTION_TYPE_STRING,
1296 .getter = team_mode_option_get,
1297 .setter = team_mode_option_set,
1298 },
1299 {
1300 .name = "enabled",
1301 .type = TEAM_OPTION_TYPE_BOOL,
1302 .per_port = true,
1303 .getter = team_port_en_option_get,
1304 .setter = team_port_en_option_set,
1305 },
1306 {
1307 .name = "user_linkup",
1308 .type = TEAM_OPTION_TYPE_BOOL,
1309 .per_port = true,
1310 .getter = team_user_linkup_option_get,
1311 .setter = team_user_linkup_option_set,
1312 },
1313 {
1314 .name = "user_linkup_enabled",
1315 .type = TEAM_OPTION_TYPE_BOOL,
1316 .per_port = true,
1317 .getter = team_user_linkup_en_option_get,
1318 .setter = team_user_linkup_en_option_set,
1319 },
1320 {
1321 .name = "priority",
1322 .type = TEAM_OPTION_TYPE_S32,
1323 .per_port = true,
1324 .getter = team_priority_option_get,
1325 .setter = team_priority_option_set,
1326 },
1327 {
1328 .name = "queue_id",
1329 .type = TEAM_OPTION_TYPE_U32,
1330 .per_port = true,
1331 .getter = team_queue_id_option_get,
1332 .setter = team_queue_id_option_set,
1333 },
1334 };
1335
1336 static struct lock_class_key team_netdev_xmit_lock_key;
1337 static struct lock_class_key team_netdev_addr_lock_key;
1338 static struct lock_class_key team_tx_busylock_key;
1339
1340 static void team_set_lockdep_class_one(struct net_device *dev,
1341 struct netdev_queue *txq,
1342 void *unused)
1343 {
1344 lockdep_set_class(&txq->_xmit_lock, &team_netdev_xmit_lock_key);
1345 }
1346
1347 static void team_set_lockdep_class(struct net_device *dev)
1348 {
1349 lockdep_set_class(&dev->addr_list_lock, &team_netdev_addr_lock_key);
1350 netdev_for_each_tx_queue(dev, team_set_lockdep_class_one, NULL);
1351 dev->qdisc_tx_busylock = &team_tx_busylock_key;
1352 }
1353
1354 static int team_init(struct net_device *dev)
1355 {
1356 struct team *team = netdev_priv(dev);
1357 int i;
1358 int err;
1359
1360 team->dev = dev;
1361 mutex_init(&team->lock);
1362 team_set_no_mode(team);
1363
1364 team->pcpu_stats = alloc_percpu(struct team_pcpu_stats);
1365 if (!team->pcpu_stats)
1366 return -ENOMEM;
1367
1368 for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1369 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1370 INIT_LIST_HEAD(&team->port_list);
1371 err = team_queue_override_init(team);
1372 if (err)
1373 goto err_team_queue_override_init;
1374
1375 team_adjust_ops(team);
1376
1377 INIT_LIST_HEAD(&team->option_list);
1378 INIT_LIST_HEAD(&team->option_inst_list);
1379 err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1380 if (err)
1381 goto err_options_register;
1382 netif_carrier_off(dev);
1383
1384 team_set_lockdep_class(dev);
1385
1386 return 0;
1387
1388 err_options_register:
1389 team_queue_override_fini(team);
1390 err_team_queue_override_init:
1391 free_percpu(team->pcpu_stats);
1392
1393 return err;
1394 }
1395
1396 static void team_uninit(struct net_device *dev)
1397 {
1398 struct team *team = netdev_priv(dev);
1399 struct team_port *port;
1400 struct team_port *tmp;
1401
1402 mutex_lock(&team->lock);
1403 list_for_each_entry_safe(port, tmp, &team->port_list, list)
1404 team_port_del(team, port->dev);
1405
1406 __team_change_mode(team, NULL); /* cleanup */
1407 __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1408 team_queue_override_fini(team);
1409 mutex_unlock(&team->lock);
1410 }
1411
1412 static void team_destructor(struct net_device *dev)
1413 {
1414 struct team *team = netdev_priv(dev);
1415
1416 free_percpu(team->pcpu_stats);
1417 free_netdev(dev);
1418 }
1419
1420 static int team_open(struct net_device *dev)
1421 {
1422 return 0;
1423 }
1424
1425 static int team_close(struct net_device *dev)
1426 {
1427 return 0;
1428 }
1429
1430 /*
1431 * note: already called with rcu_read_lock
1432 */
1433 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1434 {
1435 struct team *team = netdev_priv(dev);
1436 bool tx_success;
1437 unsigned int len = skb->len;
1438
1439 tx_success = team_queue_override_transmit(team, skb);
1440 if (!tx_success)
1441 tx_success = team->ops.transmit(team, skb);
1442 if (tx_success) {
1443 struct team_pcpu_stats *pcpu_stats;
1444
1445 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1446 u64_stats_update_begin(&pcpu_stats->syncp);
1447 pcpu_stats->tx_packets++;
1448 pcpu_stats->tx_bytes += len;
1449 u64_stats_update_end(&pcpu_stats->syncp);
1450 } else {
1451 this_cpu_inc(team->pcpu_stats->tx_dropped);
1452 }
1453
1454 return NETDEV_TX_OK;
1455 }
1456
1457 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb)
1458 {
1459 /*
1460 * This helper function exists to help dev_pick_tx get the correct
1461 * destination queue. Using a helper function skips a call to
1462 * skb_tx_hash and will put the skbs in the queue we expect on their
1463 * way down to the team driver.
1464 */
1465 u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1466
1467 /*
1468 * Save the original txq to restore before passing to the driver
1469 */
1470 qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1471
1472 if (unlikely(txq >= dev->real_num_tx_queues)) {
1473 do {
1474 txq -= dev->real_num_tx_queues;
1475 } while (txq >= dev->real_num_tx_queues);
1476 }
1477 return txq;
1478 }
1479
1480 static void team_change_rx_flags(struct net_device *dev, int change)
1481 {
1482 struct team *team = netdev_priv(dev);
1483 struct team_port *port;
1484 int inc;
1485
1486 rcu_read_lock();
1487 list_for_each_entry_rcu(port, &team->port_list, list) {
1488 if (change & IFF_PROMISC) {
1489 inc = dev->flags & IFF_PROMISC ? 1 : -1;
1490 dev_set_promiscuity(port->dev, inc);
1491 }
1492 if (change & IFF_ALLMULTI) {
1493 inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1494 dev_set_allmulti(port->dev, inc);
1495 }
1496 }
1497 rcu_read_unlock();
1498 }
1499
1500 static void team_set_rx_mode(struct net_device *dev)
1501 {
1502 struct team *team = netdev_priv(dev);
1503 struct team_port *port;
1504
1505 rcu_read_lock();
1506 list_for_each_entry_rcu(port, &team->port_list, list) {
1507 dev_uc_sync_multiple(port->dev, dev);
1508 dev_mc_sync_multiple(port->dev, dev);
1509 }
1510 rcu_read_unlock();
1511 }
1512
1513 static int team_set_mac_address(struct net_device *dev, void *p)
1514 {
1515 struct sockaddr *addr = p;
1516 struct team *team = netdev_priv(dev);
1517 struct team_port *port;
1518
1519 if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1520 return -EADDRNOTAVAIL;
1521 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1522 rcu_read_lock();
1523 list_for_each_entry_rcu(port, &team->port_list, list)
1524 if (team->ops.port_change_dev_addr)
1525 team->ops.port_change_dev_addr(team, port);
1526 rcu_read_unlock();
1527 return 0;
1528 }
1529
1530 static int team_change_mtu(struct net_device *dev, int new_mtu)
1531 {
1532 struct team *team = netdev_priv(dev);
1533 struct team_port *port;
1534 int err;
1535
1536 /*
1537 * Alhough this is reader, it's guarded by team lock. It's not possible
1538 * to traverse list in reverse under rcu_read_lock
1539 */
1540 mutex_lock(&team->lock);
1541 list_for_each_entry(port, &team->port_list, list) {
1542 err = dev_set_mtu(port->dev, new_mtu);
1543 if (err) {
1544 netdev_err(dev, "Device %s failed to change mtu",
1545 port->dev->name);
1546 goto unwind;
1547 }
1548 }
1549 mutex_unlock(&team->lock);
1550
1551 dev->mtu = new_mtu;
1552
1553 return 0;
1554
1555 unwind:
1556 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1557 dev_set_mtu(port->dev, dev->mtu);
1558 mutex_unlock(&team->lock);
1559
1560 return err;
1561 }
1562
1563 static struct rtnl_link_stats64 *
1564 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1565 {
1566 struct team *team = netdev_priv(dev);
1567 struct team_pcpu_stats *p;
1568 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1569 u32 rx_dropped = 0, tx_dropped = 0;
1570 unsigned int start;
1571 int i;
1572
1573 for_each_possible_cpu(i) {
1574 p = per_cpu_ptr(team->pcpu_stats, i);
1575 do {
1576 start = u64_stats_fetch_begin_bh(&p->syncp);
1577 rx_packets = p->rx_packets;
1578 rx_bytes = p->rx_bytes;
1579 rx_multicast = p->rx_multicast;
1580 tx_packets = p->tx_packets;
1581 tx_bytes = p->tx_bytes;
1582 } while (u64_stats_fetch_retry_bh(&p->syncp, start));
1583
1584 stats->rx_packets += rx_packets;
1585 stats->rx_bytes += rx_bytes;
1586 stats->multicast += rx_multicast;
1587 stats->tx_packets += tx_packets;
1588 stats->tx_bytes += tx_bytes;
1589 /*
1590 * rx_dropped & tx_dropped are u32, updated
1591 * without syncp protection.
1592 */
1593 rx_dropped += p->rx_dropped;
1594 tx_dropped += p->tx_dropped;
1595 }
1596 stats->rx_dropped = rx_dropped;
1597 stats->tx_dropped = tx_dropped;
1598 return stats;
1599 }
1600
1601 static int team_vlan_rx_add_vid(struct net_device *dev, uint16_t vid)
1602 {
1603 struct team *team = netdev_priv(dev);
1604 struct team_port *port;
1605 int err;
1606
1607 /*
1608 * Alhough this is reader, it's guarded by team lock. It's not possible
1609 * to traverse list in reverse under rcu_read_lock
1610 */
1611 mutex_lock(&team->lock);
1612 list_for_each_entry(port, &team->port_list, list) {
1613 err = vlan_vid_add(port->dev, vid);
1614 if (err)
1615 goto unwind;
1616 }
1617 mutex_unlock(&team->lock);
1618
1619 return 0;
1620
1621 unwind:
1622 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1623 vlan_vid_del(port->dev, vid);
1624 mutex_unlock(&team->lock);
1625
1626 return err;
1627 }
1628
1629 static int team_vlan_rx_kill_vid(struct net_device *dev, uint16_t vid)
1630 {
1631 struct team *team = netdev_priv(dev);
1632 struct team_port *port;
1633
1634 rcu_read_lock();
1635 list_for_each_entry_rcu(port, &team->port_list, list)
1636 vlan_vid_del(port->dev, vid);
1637 rcu_read_unlock();
1638
1639 return 0;
1640 }
1641
1642 #ifdef CONFIG_NET_POLL_CONTROLLER
1643 static void team_poll_controller(struct net_device *dev)
1644 {
1645 }
1646
1647 static void __team_netpoll_cleanup(struct team *team)
1648 {
1649 struct team_port *port;
1650
1651 list_for_each_entry(port, &team->port_list, list)
1652 team_port_disable_netpoll(port);
1653 }
1654
1655 static void team_netpoll_cleanup(struct net_device *dev)
1656 {
1657 struct team *team = netdev_priv(dev);
1658
1659 mutex_lock(&team->lock);
1660 __team_netpoll_cleanup(team);
1661 mutex_unlock(&team->lock);
1662 }
1663
1664 static int team_netpoll_setup(struct net_device *dev,
1665 struct netpoll_info *npifo, gfp_t gfp)
1666 {
1667 struct team *team = netdev_priv(dev);
1668 struct team_port *port;
1669 int err = 0;
1670
1671 mutex_lock(&team->lock);
1672 list_for_each_entry(port, &team->port_list, list) {
1673 err = team_port_enable_netpoll(team, port, gfp);
1674 if (err) {
1675 __team_netpoll_cleanup(team);
1676 break;
1677 }
1678 }
1679 mutex_unlock(&team->lock);
1680 return err;
1681 }
1682 #endif
1683
1684 static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
1685 {
1686 struct team *team = netdev_priv(dev);
1687 int err;
1688
1689 mutex_lock(&team->lock);
1690 err = team_port_add(team, port_dev);
1691 mutex_unlock(&team->lock);
1692 return err;
1693 }
1694
1695 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1696 {
1697 struct team *team = netdev_priv(dev);
1698 int err;
1699
1700 mutex_lock(&team->lock);
1701 err = team_port_del(team, port_dev);
1702 mutex_unlock(&team->lock);
1703 return err;
1704 }
1705
1706 static netdev_features_t team_fix_features(struct net_device *dev,
1707 netdev_features_t features)
1708 {
1709 struct team_port *port;
1710 struct team *team = netdev_priv(dev);
1711 netdev_features_t mask;
1712
1713 mask = features;
1714 features &= ~NETIF_F_ONE_FOR_ALL;
1715 features |= NETIF_F_ALL_FOR_ALL;
1716
1717 rcu_read_lock();
1718 list_for_each_entry_rcu(port, &team->port_list, list) {
1719 features = netdev_increment_features(features,
1720 port->dev->features,
1721 mask);
1722 }
1723 rcu_read_unlock();
1724 return features;
1725 }
1726
1727 static int team_change_carrier(struct net_device *dev, bool new_carrier)
1728 {
1729 struct team *team = netdev_priv(dev);
1730
1731 team->user_carrier_enabled = true;
1732
1733 if (new_carrier)
1734 netif_carrier_on(dev);
1735 else
1736 netif_carrier_off(dev);
1737 return 0;
1738 }
1739
1740 static const struct net_device_ops team_netdev_ops = {
1741 .ndo_init = team_init,
1742 .ndo_uninit = team_uninit,
1743 .ndo_open = team_open,
1744 .ndo_stop = team_close,
1745 .ndo_start_xmit = team_xmit,
1746 .ndo_select_queue = team_select_queue,
1747 .ndo_change_rx_flags = team_change_rx_flags,
1748 .ndo_set_rx_mode = team_set_rx_mode,
1749 .ndo_set_mac_address = team_set_mac_address,
1750 .ndo_change_mtu = team_change_mtu,
1751 .ndo_get_stats64 = team_get_stats64,
1752 .ndo_vlan_rx_add_vid = team_vlan_rx_add_vid,
1753 .ndo_vlan_rx_kill_vid = team_vlan_rx_kill_vid,
1754 #ifdef CONFIG_NET_POLL_CONTROLLER
1755 .ndo_poll_controller = team_poll_controller,
1756 .ndo_netpoll_setup = team_netpoll_setup,
1757 .ndo_netpoll_cleanup = team_netpoll_cleanup,
1758 #endif
1759 .ndo_add_slave = team_add_slave,
1760 .ndo_del_slave = team_del_slave,
1761 .ndo_fix_features = team_fix_features,
1762 .ndo_change_carrier = team_change_carrier,
1763 };
1764
1765 /***********************
1766 * ethtool interface
1767 ***********************/
1768
1769 static void team_ethtool_get_drvinfo(struct net_device *dev,
1770 struct ethtool_drvinfo *drvinfo)
1771 {
1772 strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
1773 strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
1774 }
1775
1776 static const struct ethtool_ops team_ethtool_ops = {
1777 .get_drvinfo = team_ethtool_get_drvinfo,
1778 .get_link = ethtool_op_get_link,
1779 };
1780
1781 /***********************
1782 * rt netlink interface
1783 ***********************/
1784
1785 static void team_setup_by_port(struct net_device *dev,
1786 struct net_device *port_dev)
1787 {
1788 dev->header_ops = port_dev->header_ops;
1789 dev->type = port_dev->type;
1790 dev->hard_header_len = port_dev->hard_header_len;
1791 dev->addr_len = port_dev->addr_len;
1792 dev->mtu = port_dev->mtu;
1793 memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
1794 memcpy(dev->dev_addr, port_dev->dev_addr, port_dev->addr_len);
1795 }
1796
1797 static int team_dev_type_check_change(struct net_device *dev,
1798 struct net_device *port_dev)
1799 {
1800 struct team *team = netdev_priv(dev);
1801 char *portname = port_dev->name;
1802 int err;
1803
1804 if (dev->type == port_dev->type)
1805 return 0;
1806 if (!list_empty(&team->port_list)) {
1807 netdev_err(dev, "Device %s is of different type\n", portname);
1808 return -EBUSY;
1809 }
1810 err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
1811 err = notifier_to_errno(err);
1812 if (err) {
1813 netdev_err(dev, "Refused to change device type\n");
1814 return err;
1815 }
1816 dev_uc_flush(dev);
1817 dev_mc_flush(dev);
1818 team_setup_by_port(dev, port_dev);
1819 call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
1820 return 0;
1821 }
1822
1823 static void team_setup(struct net_device *dev)
1824 {
1825 ether_setup(dev);
1826
1827 dev->netdev_ops = &team_netdev_ops;
1828 dev->ethtool_ops = &team_ethtool_ops;
1829 dev->destructor = team_destructor;
1830 dev->tx_queue_len = 0;
1831 dev->flags |= IFF_MULTICAST;
1832 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
1833
1834 /*
1835 * Indicate we support unicast address filtering. That way core won't
1836 * bring us to promisc mode in case a unicast addr is added.
1837 * Let this up to underlay drivers.
1838 */
1839 dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
1840
1841 dev->features |= NETIF_F_LLTX;
1842 dev->features |= NETIF_F_GRO;
1843 dev->hw_features = TEAM_VLAN_FEATURES |
1844 NETIF_F_HW_VLAN_CTAG_TX |
1845 NETIF_F_HW_VLAN_CTAG_RX |
1846 NETIF_F_HW_VLAN_CTAG_FILTER;
1847
1848 dev->hw_features &= ~(NETIF_F_ALL_CSUM & ~NETIF_F_HW_CSUM);
1849 dev->features |= dev->hw_features;
1850 }
1851
1852 static int team_newlink(struct net *src_net, struct net_device *dev,
1853 struct nlattr *tb[], struct nlattr *data[])
1854 {
1855 int err;
1856
1857 if (tb[IFLA_ADDRESS] == NULL)
1858 eth_hw_addr_random(dev);
1859
1860 err = register_netdevice(dev);
1861 if (err)
1862 return err;
1863
1864 return 0;
1865 }
1866
1867 static int team_validate(struct nlattr *tb[], struct nlattr *data[])
1868 {
1869 if (tb[IFLA_ADDRESS]) {
1870 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
1871 return -EINVAL;
1872 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
1873 return -EADDRNOTAVAIL;
1874 }
1875 return 0;
1876 }
1877
1878 static unsigned int team_get_num_tx_queues(void)
1879 {
1880 return TEAM_DEFAULT_NUM_TX_QUEUES;
1881 }
1882
1883 static unsigned int team_get_num_rx_queues(void)
1884 {
1885 return TEAM_DEFAULT_NUM_RX_QUEUES;
1886 }
1887
1888 static struct rtnl_link_ops team_link_ops __read_mostly = {
1889 .kind = DRV_NAME,
1890 .priv_size = sizeof(struct team),
1891 .setup = team_setup,
1892 .newlink = team_newlink,
1893 .validate = team_validate,
1894 .get_num_tx_queues = team_get_num_tx_queues,
1895 .get_num_rx_queues = team_get_num_rx_queues,
1896 };
1897
1898
1899 /***********************************
1900 * Generic netlink custom interface
1901 ***********************************/
1902
1903 static struct genl_family team_nl_family = {
1904 .id = GENL_ID_GENERATE,
1905 .name = TEAM_GENL_NAME,
1906 .version = TEAM_GENL_VERSION,
1907 .maxattr = TEAM_ATTR_MAX,
1908 .netnsok = true,
1909 };
1910
1911 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
1912 [TEAM_ATTR_UNSPEC] = { .type = NLA_UNSPEC, },
1913 [TEAM_ATTR_TEAM_IFINDEX] = { .type = NLA_U32 },
1914 [TEAM_ATTR_LIST_OPTION] = { .type = NLA_NESTED },
1915 [TEAM_ATTR_LIST_PORT] = { .type = NLA_NESTED },
1916 };
1917
1918 static const struct nla_policy
1919 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
1920 [TEAM_ATTR_OPTION_UNSPEC] = { .type = NLA_UNSPEC, },
1921 [TEAM_ATTR_OPTION_NAME] = {
1922 .type = NLA_STRING,
1923 .len = TEAM_STRING_MAX_LEN,
1924 },
1925 [TEAM_ATTR_OPTION_CHANGED] = { .type = NLA_FLAG },
1926 [TEAM_ATTR_OPTION_TYPE] = { .type = NLA_U8 },
1927 [TEAM_ATTR_OPTION_DATA] = { .type = NLA_BINARY },
1928 };
1929
1930 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
1931 {
1932 struct sk_buff *msg;
1933 void *hdr;
1934 int err;
1935
1936 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1937 if (!msg)
1938 return -ENOMEM;
1939
1940 hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
1941 &team_nl_family, 0, TEAM_CMD_NOOP);
1942 if (!hdr) {
1943 err = -EMSGSIZE;
1944 goto err_msg_put;
1945 }
1946
1947 genlmsg_end(msg, hdr);
1948
1949 return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
1950
1951 err_msg_put:
1952 nlmsg_free(msg);
1953
1954 return err;
1955 }
1956
1957 /*
1958 * Netlink cmd functions should be locked by following two functions.
1959 * Since dev gets held here, that ensures dev won't disappear in between.
1960 */
1961 static struct team *team_nl_team_get(struct genl_info *info)
1962 {
1963 struct net *net = genl_info_net(info);
1964 int ifindex;
1965 struct net_device *dev;
1966 struct team *team;
1967
1968 if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
1969 return NULL;
1970
1971 ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
1972 dev = dev_get_by_index(net, ifindex);
1973 if (!dev || dev->netdev_ops != &team_netdev_ops) {
1974 if (dev)
1975 dev_put(dev);
1976 return NULL;
1977 }
1978
1979 team = netdev_priv(dev);
1980 mutex_lock(&team->lock);
1981 return team;
1982 }
1983
1984 static void team_nl_team_put(struct team *team)
1985 {
1986 mutex_unlock(&team->lock);
1987 dev_put(team->dev);
1988 }
1989
1990 typedef int team_nl_send_func_t(struct sk_buff *skb,
1991 struct team *team, u32 portid);
1992
1993 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
1994 {
1995 return genlmsg_unicast(dev_net(team->dev), skb, portid);
1996 }
1997
1998 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
1999 struct team_option_inst *opt_inst)
2000 {
2001 struct nlattr *option_item;
2002 struct team_option *option = opt_inst->option;
2003 struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2004 struct team_gsetter_ctx ctx;
2005 int err;
2006
2007 ctx.info = opt_inst_info;
2008 err = team_option_get(team, opt_inst, &ctx);
2009 if (err)
2010 return err;
2011
2012 option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
2013 if (!option_item)
2014 return -EMSGSIZE;
2015
2016 if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2017 goto nest_cancel;
2018 if (opt_inst_info->port &&
2019 nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2020 opt_inst_info->port->dev->ifindex))
2021 goto nest_cancel;
2022 if (opt_inst->option->array_size &&
2023 nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2024 opt_inst_info->array_index))
2025 goto nest_cancel;
2026
2027 switch (option->type) {
2028 case TEAM_OPTION_TYPE_U32:
2029 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2030 goto nest_cancel;
2031 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2032 goto nest_cancel;
2033 break;
2034 case TEAM_OPTION_TYPE_STRING:
2035 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2036 goto nest_cancel;
2037 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2038 ctx.data.str_val))
2039 goto nest_cancel;
2040 break;
2041 case TEAM_OPTION_TYPE_BINARY:
2042 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2043 goto nest_cancel;
2044 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2045 ctx.data.bin_val.ptr))
2046 goto nest_cancel;
2047 break;
2048 case TEAM_OPTION_TYPE_BOOL:
2049 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2050 goto nest_cancel;
2051 if (ctx.data.bool_val &&
2052 nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2053 goto nest_cancel;
2054 break;
2055 case TEAM_OPTION_TYPE_S32:
2056 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2057 goto nest_cancel;
2058 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2059 goto nest_cancel;
2060 break;
2061 default:
2062 BUG();
2063 }
2064 if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2065 goto nest_cancel;
2066 if (opt_inst->changed) {
2067 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2068 goto nest_cancel;
2069 opt_inst->changed = false;
2070 }
2071 nla_nest_end(skb, option_item);
2072 return 0;
2073
2074 nest_cancel:
2075 nla_nest_cancel(skb, option_item);
2076 return -EMSGSIZE;
2077 }
2078
2079 static int __send_and_alloc_skb(struct sk_buff **pskb,
2080 struct team *team, u32 portid,
2081 team_nl_send_func_t *send_func)
2082 {
2083 int err;
2084
2085 if (*pskb) {
2086 err = send_func(*pskb, team, portid);
2087 if (err)
2088 return err;
2089 }
2090 *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2091 if (!*pskb)
2092 return -ENOMEM;
2093 return 0;
2094 }
2095
2096 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2097 int flags, team_nl_send_func_t *send_func,
2098 struct list_head *sel_opt_inst_list)
2099 {
2100 struct nlattr *option_list;
2101 struct nlmsghdr *nlh;
2102 void *hdr;
2103 struct team_option_inst *opt_inst;
2104 int err;
2105 struct sk_buff *skb = NULL;
2106 bool incomplete;
2107 int i;
2108
2109 opt_inst = list_first_entry(sel_opt_inst_list,
2110 struct team_option_inst, tmp_list);
2111
2112 start_again:
2113 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2114 if (err)
2115 return err;
2116
2117 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2118 TEAM_CMD_OPTIONS_GET);
2119 if (!hdr)
2120 return -EMSGSIZE;
2121
2122 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2123 goto nla_put_failure;
2124 option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2125 if (!option_list)
2126 goto nla_put_failure;
2127
2128 i = 0;
2129 incomplete = false;
2130 list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2131 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2132 if (err) {
2133 if (err == -EMSGSIZE) {
2134 if (!i)
2135 goto errout;
2136 incomplete = true;
2137 break;
2138 }
2139 goto errout;
2140 }
2141 i++;
2142 }
2143
2144 nla_nest_end(skb, option_list);
2145 genlmsg_end(skb, hdr);
2146 if (incomplete)
2147 goto start_again;
2148
2149 send_done:
2150 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2151 if (!nlh) {
2152 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2153 if (err)
2154 goto errout;
2155 goto send_done;
2156 }
2157
2158 return send_func(skb, team, portid);
2159
2160 nla_put_failure:
2161 err = -EMSGSIZE;
2162 errout:
2163 genlmsg_cancel(skb, hdr);
2164 nlmsg_free(skb);
2165 return err;
2166 }
2167
2168 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2169 {
2170 struct team *team;
2171 struct team_option_inst *opt_inst;
2172 int err;
2173 LIST_HEAD(sel_opt_inst_list);
2174
2175 team = team_nl_team_get(info);
2176 if (!team)
2177 return -EINVAL;
2178
2179 list_for_each_entry(opt_inst, &team->option_inst_list, list)
2180 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2181 err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2182 NLM_F_ACK, team_nl_send_unicast,
2183 &sel_opt_inst_list);
2184
2185 team_nl_team_put(team);
2186
2187 return err;
2188 }
2189
2190 static int team_nl_send_event_options_get(struct team *team,
2191 struct list_head *sel_opt_inst_list);
2192
2193 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2194 {
2195 struct team *team;
2196 int err = 0;
2197 int i;
2198 struct nlattr *nl_option;
2199 LIST_HEAD(opt_inst_list);
2200
2201 team = team_nl_team_get(info);
2202 if (!team)
2203 return -EINVAL;
2204
2205 err = -EINVAL;
2206 if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2207 err = -EINVAL;
2208 goto team_put;
2209 }
2210
2211 nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2212 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2213 struct nlattr *attr;
2214 struct nlattr *attr_data;
2215 enum team_option_type opt_type;
2216 int opt_port_ifindex = 0; /* != 0 for per-port options */
2217 u32 opt_array_index = 0;
2218 bool opt_is_array = false;
2219 struct team_option_inst *opt_inst;
2220 char *opt_name;
2221 bool opt_found = false;
2222
2223 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2224 err = -EINVAL;
2225 goto team_put;
2226 }
2227 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2228 nl_option, team_nl_option_policy);
2229 if (err)
2230 goto team_put;
2231 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2232 !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2233 err = -EINVAL;
2234 goto team_put;
2235 }
2236 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2237 case NLA_U32:
2238 opt_type = TEAM_OPTION_TYPE_U32;
2239 break;
2240 case NLA_STRING:
2241 opt_type = TEAM_OPTION_TYPE_STRING;
2242 break;
2243 case NLA_BINARY:
2244 opt_type = TEAM_OPTION_TYPE_BINARY;
2245 break;
2246 case NLA_FLAG:
2247 opt_type = TEAM_OPTION_TYPE_BOOL;
2248 break;
2249 case NLA_S32:
2250 opt_type = TEAM_OPTION_TYPE_S32;
2251 break;
2252 default:
2253 goto team_put;
2254 }
2255
2256 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2257 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2258 err = -EINVAL;
2259 goto team_put;
2260 }
2261
2262 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2263 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2264 if (attr)
2265 opt_port_ifindex = nla_get_u32(attr);
2266
2267 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2268 if (attr) {
2269 opt_is_array = true;
2270 opt_array_index = nla_get_u32(attr);
2271 }
2272
2273 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2274 struct team_option *option = opt_inst->option;
2275 struct team_gsetter_ctx ctx;
2276 struct team_option_inst_info *opt_inst_info;
2277 int tmp_ifindex;
2278
2279 opt_inst_info = &opt_inst->info;
2280 tmp_ifindex = opt_inst_info->port ?
2281 opt_inst_info->port->dev->ifindex : 0;
2282 if (option->type != opt_type ||
2283 strcmp(option->name, opt_name) ||
2284 tmp_ifindex != opt_port_ifindex ||
2285 (option->array_size && !opt_is_array) ||
2286 opt_inst_info->array_index != opt_array_index)
2287 continue;
2288 opt_found = true;
2289 ctx.info = opt_inst_info;
2290 switch (opt_type) {
2291 case TEAM_OPTION_TYPE_U32:
2292 ctx.data.u32_val = nla_get_u32(attr_data);
2293 break;
2294 case TEAM_OPTION_TYPE_STRING:
2295 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2296 err = -EINVAL;
2297 goto team_put;
2298 }
2299 ctx.data.str_val = nla_data(attr_data);
2300 break;
2301 case TEAM_OPTION_TYPE_BINARY:
2302 ctx.data.bin_val.len = nla_len(attr_data);
2303 ctx.data.bin_val.ptr = nla_data(attr_data);
2304 break;
2305 case TEAM_OPTION_TYPE_BOOL:
2306 ctx.data.bool_val = attr_data ? true : false;
2307 break;
2308 case TEAM_OPTION_TYPE_S32:
2309 ctx.data.s32_val = nla_get_s32(attr_data);
2310 break;
2311 default:
2312 BUG();
2313 }
2314 err = team_option_set(team, opt_inst, &ctx);
2315 if (err)
2316 goto team_put;
2317 opt_inst->changed = true;
2318 list_add(&opt_inst->tmp_list, &opt_inst_list);
2319 }
2320 if (!opt_found) {
2321 err = -ENOENT;
2322 goto team_put;
2323 }
2324 }
2325
2326 err = team_nl_send_event_options_get(team, &opt_inst_list);
2327
2328 team_put:
2329 team_nl_team_put(team);
2330
2331 return err;
2332 }
2333
2334 static int team_nl_fill_one_port_get(struct sk_buff *skb,
2335 struct team_port *port)
2336 {
2337 struct nlattr *port_item;
2338
2339 port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2340 if (!port_item)
2341 goto nest_cancel;
2342 if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2343 goto nest_cancel;
2344 if (port->changed) {
2345 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2346 goto nest_cancel;
2347 port->changed = false;
2348 }
2349 if ((port->removed &&
2350 nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2351 (port->state.linkup &&
2352 nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2353 nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2354 nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2355 goto nest_cancel;
2356 nla_nest_end(skb, port_item);
2357 return 0;
2358
2359 nest_cancel:
2360 nla_nest_cancel(skb, port_item);
2361 return -EMSGSIZE;
2362 }
2363
2364 static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2365 int flags, team_nl_send_func_t *send_func,
2366 struct team_port *one_port)
2367 {
2368 struct nlattr *port_list;
2369 struct nlmsghdr *nlh;
2370 void *hdr;
2371 struct team_port *port;
2372 int err;
2373 struct sk_buff *skb = NULL;
2374 bool incomplete;
2375 int i;
2376
2377 port = list_first_entry(&team->port_list, struct team_port, list);
2378
2379 start_again:
2380 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2381 if (err)
2382 return err;
2383
2384 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2385 TEAM_CMD_PORT_LIST_GET);
2386 if (!hdr)
2387 return -EMSGSIZE;
2388
2389 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2390 goto nla_put_failure;
2391 port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2392 if (!port_list)
2393 goto nla_put_failure;
2394
2395 i = 0;
2396 incomplete = false;
2397
2398 /* If one port is selected, called wants to send port list containing
2399 * only this port. Otherwise go through all listed ports and send all
2400 */
2401 if (one_port) {
2402 err = team_nl_fill_one_port_get(skb, one_port);
2403 if (err)
2404 goto errout;
2405 } else {
2406 list_for_each_entry(port, &team->port_list, list) {
2407 err = team_nl_fill_one_port_get(skb, port);
2408 if (err) {
2409 if (err == -EMSGSIZE) {
2410 if (!i)
2411 goto errout;
2412 incomplete = true;
2413 break;
2414 }
2415 goto errout;
2416 }
2417 i++;
2418 }
2419 }
2420
2421 nla_nest_end(skb, port_list);
2422 genlmsg_end(skb, hdr);
2423 if (incomplete)
2424 goto start_again;
2425
2426 send_done:
2427 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2428 if (!nlh) {
2429 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2430 if (err)
2431 goto errout;
2432 goto send_done;
2433 }
2434
2435 return send_func(skb, team, portid);
2436
2437 nla_put_failure:
2438 err = -EMSGSIZE;
2439 errout:
2440 genlmsg_cancel(skb, hdr);
2441 nlmsg_free(skb);
2442 return err;
2443 }
2444
2445 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2446 struct genl_info *info)
2447 {
2448 struct team *team;
2449 int err;
2450
2451 team = team_nl_team_get(info);
2452 if (!team)
2453 return -EINVAL;
2454
2455 err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2456 NLM_F_ACK, team_nl_send_unicast, NULL);
2457
2458 team_nl_team_put(team);
2459
2460 return err;
2461 }
2462
2463 static struct genl_ops team_nl_ops[] = {
2464 {
2465 .cmd = TEAM_CMD_NOOP,
2466 .doit = team_nl_cmd_noop,
2467 .policy = team_nl_policy,
2468 },
2469 {
2470 .cmd = TEAM_CMD_OPTIONS_SET,
2471 .doit = team_nl_cmd_options_set,
2472 .policy = team_nl_policy,
2473 .flags = GENL_ADMIN_PERM,
2474 },
2475 {
2476 .cmd = TEAM_CMD_OPTIONS_GET,
2477 .doit = team_nl_cmd_options_get,
2478 .policy = team_nl_policy,
2479 .flags = GENL_ADMIN_PERM,
2480 },
2481 {
2482 .cmd = TEAM_CMD_PORT_LIST_GET,
2483 .doit = team_nl_cmd_port_list_get,
2484 .policy = team_nl_policy,
2485 .flags = GENL_ADMIN_PERM,
2486 },
2487 };
2488
2489 static struct genl_multicast_group team_change_event_mcgrp = {
2490 .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME,
2491 };
2492
2493 static int team_nl_send_multicast(struct sk_buff *skb,
2494 struct team *team, u32 portid)
2495 {
2496 return genlmsg_multicast_netns(dev_net(team->dev), skb, 0,
2497 team_change_event_mcgrp.id, GFP_KERNEL);
2498 }
2499
2500 static int team_nl_send_event_options_get(struct team *team,
2501 struct list_head *sel_opt_inst_list)
2502 {
2503 return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2504 sel_opt_inst_list);
2505 }
2506
2507 static int team_nl_send_event_port_get(struct team *team,
2508 struct team_port *port)
2509 {
2510 return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2511 port);
2512 }
2513
2514 static int team_nl_init(void)
2515 {
2516 int err;
2517
2518 err = genl_register_family_with_ops(&team_nl_family, team_nl_ops,
2519 ARRAY_SIZE(team_nl_ops));
2520 if (err)
2521 return err;
2522
2523 err = genl_register_mc_group(&team_nl_family, &team_change_event_mcgrp);
2524 if (err)
2525 goto err_change_event_grp_reg;
2526
2527 return 0;
2528
2529 err_change_event_grp_reg:
2530 genl_unregister_family(&team_nl_family);
2531
2532 return err;
2533 }
2534
2535 static void team_nl_fini(void)
2536 {
2537 genl_unregister_family(&team_nl_family);
2538 }
2539
2540
2541 /******************
2542 * Change checkers
2543 ******************/
2544
2545 static void __team_options_change_check(struct team *team)
2546 {
2547 int err;
2548 struct team_option_inst *opt_inst;
2549 LIST_HEAD(sel_opt_inst_list);
2550
2551 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2552 if (opt_inst->changed)
2553 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2554 }
2555 err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2556 if (err && err != -ESRCH)
2557 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2558 err);
2559 }
2560
2561 /* rtnl lock is held */
2562
2563 static void __team_port_change_send(struct team_port *port, bool linkup)
2564 {
2565 int err;
2566
2567 port->changed = true;
2568 port->state.linkup = linkup;
2569 team_refresh_port_linkup(port);
2570 if (linkup) {
2571 struct ethtool_cmd ecmd;
2572
2573 err = __ethtool_get_settings(port->dev, &ecmd);
2574 if (!err) {
2575 port->state.speed = ethtool_cmd_speed(&ecmd);
2576 port->state.duplex = ecmd.duplex;
2577 goto send_event;
2578 }
2579 }
2580 port->state.speed = 0;
2581 port->state.duplex = 0;
2582
2583 send_event:
2584 err = team_nl_send_event_port_get(port->team, port);
2585 if (err && err != -ESRCH)
2586 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2587 port->dev->name, err);
2588
2589 }
2590
2591 static void __team_carrier_check(struct team *team)
2592 {
2593 struct team_port *port;
2594 bool team_linkup;
2595
2596 if (team->user_carrier_enabled)
2597 return;
2598
2599 team_linkup = false;
2600 list_for_each_entry(port, &team->port_list, list) {
2601 if (port->linkup) {
2602 team_linkup = true;
2603 break;
2604 }
2605 }
2606
2607 if (team_linkup)
2608 netif_carrier_on(team->dev);
2609 else
2610 netif_carrier_off(team->dev);
2611 }
2612
2613 static void __team_port_change_check(struct team_port *port, bool linkup)
2614 {
2615 if (port->state.linkup != linkup)
2616 __team_port_change_send(port, linkup);
2617 __team_carrier_check(port->team);
2618 }
2619
2620 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2621 {
2622 __team_port_change_send(port, linkup);
2623 __team_carrier_check(port->team);
2624 }
2625
2626 static void __team_port_change_port_removed(struct team_port *port)
2627 {
2628 port->removed = true;
2629 __team_port_change_send(port, false);
2630 __team_carrier_check(port->team);
2631 }
2632
2633 static void team_port_change_check(struct team_port *port, bool linkup)
2634 {
2635 struct team *team = port->team;
2636
2637 mutex_lock(&team->lock);
2638 __team_port_change_check(port, linkup);
2639 mutex_unlock(&team->lock);
2640 }
2641
2642
2643 /************************************
2644 * Net device notifier event handler
2645 ************************************/
2646
2647 static int team_device_event(struct notifier_block *unused,
2648 unsigned long event, void *ptr)
2649 {
2650 struct net_device *dev = (struct net_device *) ptr;
2651 struct team_port *port;
2652
2653 port = team_port_get_rtnl(dev);
2654 if (!port)
2655 return NOTIFY_DONE;
2656
2657 switch (event) {
2658 case NETDEV_UP:
2659 if (netif_carrier_ok(dev))
2660 team_port_change_check(port, true);
2661 case NETDEV_DOWN:
2662 team_port_change_check(port, false);
2663 case NETDEV_CHANGE:
2664 if (netif_running(port->dev))
2665 team_port_change_check(port,
2666 !!netif_carrier_ok(port->dev));
2667 break;
2668 case NETDEV_UNREGISTER:
2669 team_del_slave(port->team->dev, dev);
2670 break;
2671 case NETDEV_FEAT_CHANGE:
2672 team_compute_features(port->team);
2673 break;
2674 case NETDEV_CHANGEMTU:
2675 /* Forbid to change mtu of underlaying device */
2676 return NOTIFY_BAD;
2677 case NETDEV_PRE_TYPE_CHANGE:
2678 /* Forbid to change type of underlaying device */
2679 return NOTIFY_BAD;
2680 }
2681 return NOTIFY_DONE;
2682 }
2683
2684 static struct notifier_block team_notifier_block __read_mostly = {
2685 .notifier_call = team_device_event,
2686 };
2687
2688
2689 /***********************
2690 * Module init and exit
2691 ***********************/
2692
2693 static int __init team_module_init(void)
2694 {
2695 int err;
2696
2697 register_netdevice_notifier(&team_notifier_block);
2698
2699 err = rtnl_link_register(&team_link_ops);
2700 if (err)
2701 goto err_rtnl_reg;
2702
2703 err = team_nl_init();
2704 if (err)
2705 goto err_nl_init;
2706
2707 return 0;
2708
2709 err_nl_init:
2710 rtnl_link_unregister(&team_link_ops);
2711
2712 err_rtnl_reg:
2713 unregister_netdevice_notifier(&team_notifier_block);
2714
2715 return err;
2716 }
2717
2718 static void __exit team_module_exit(void)
2719 {
2720 team_nl_fini();
2721 rtnl_link_unregister(&team_link_ops);
2722 unregister_netdevice_notifier(&team_notifier_block);
2723 }
2724
2725 module_init(team_module_init);
2726 module_exit(team_module_exit);
2727
2728 MODULE_LICENSE("GPL v2");
2729 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
2730 MODULE_DESCRIPTION("Ethernet team device driver");
2731 MODULE_ALIAS_RTNL_LINK(DRV_NAME);
Linux kernel - Deliverables
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