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team: fix hw_features setup
[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 <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 device address for open port device is tested in
58 * team_port_add, this function can be called without control of return value
59 */
60 static int __set_port_dev_addr(struct net_device *port_dev,
61 const unsigned char *dev_addr)
62 {
63 struct sockaddr addr;
64
65 memcpy(addr.sa_data, dev_addr, port_dev->addr_len);
66 addr.sa_family = port_dev->type;
67 return dev_set_mac_address(port_dev, &addr);
68 }
69
70 static int team_port_set_orig_dev_addr(struct team_port *port)
71 {
72 return __set_port_dev_addr(port->dev, port->orig.dev_addr);
73 }
74
75 int team_port_set_team_dev_addr(struct team_port *port)
76 {
77 return __set_port_dev_addr(port->dev, port->team->dev->dev_addr);
78 }
79 EXPORT_SYMBOL(team_port_set_team_dev_addr);
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 * Multiqueue Tx port select override
663 *************************************/
664
665 static int team_queue_override_init(struct team *team)
666 {
667 struct list_head *listarr;
668 unsigned int queue_cnt = team->dev->num_tx_queues - 1;
669 unsigned int i;
670
671 if (!queue_cnt)
672 return 0;
673 listarr = kmalloc(sizeof(struct list_head) * queue_cnt, GFP_KERNEL);
674 if (!listarr)
675 return -ENOMEM;
676 team->qom_lists = listarr;
677 for (i = 0; i < queue_cnt; i++)
678 INIT_LIST_HEAD(listarr++);
679 return 0;
680 }
681
682 static void team_queue_override_fini(struct team *team)
683 {
684 kfree(team->qom_lists);
685 }
686
687 static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
688 {
689 return &team->qom_lists[queue_id - 1];
690 }
691
692 /*
693 * note: already called with rcu_read_lock
694 */
695 static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
696 {
697 struct list_head *qom_list;
698 struct team_port *port;
699
700 if (!team->queue_override_enabled || !skb->queue_mapping)
701 return false;
702 qom_list = __team_get_qom_list(team, skb->queue_mapping);
703 list_for_each_entry_rcu(port, qom_list, qom_list) {
704 if (!team_dev_queue_xmit(team, port, skb))
705 return true;
706 }
707 return false;
708 }
709
710 static void __team_queue_override_port_del(struct team *team,
711 struct team_port *port)
712 {
713 list_del_rcu(&port->qom_list);
714 synchronize_rcu();
715 INIT_LIST_HEAD(&port->qom_list);
716 }
717
718 static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
719 struct team_port *cur)
720 {
721 if (port->priority < cur->priority)
722 return true;
723 if (port->priority > cur->priority)
724 return false;
725 if (port->index < cur->index)
726 return true;
727 return false;
728 }
729
730 static void __team_queue_override_port_add(struct team *team,
731 struct team_port *port)
732 {
733 struct team_port *cur;
734 struct list_head *qom_list;
735 struct list_head *node;
736
737 if (!port->queue_id || !team_port_enabled(port))
738 return;
739
740 qom_list = __team_get_qom_list(team, port->queue_id);
741 node = qom_list;
742 list_for_each_entry(cur, qom_list, qom_list) {
743 if (team_queue_override_port_has_gt_prio_than(port, cur))
744 break;
745 node = &cur->qom_list;
746 }
747 list_add_tail_rcu(&port->qom_list, node);
748 }
749
750 static void __team_queue_override_enabled_check(struct team *team)
751 {
752 struct team_port *port;
753 bool enabled = false;
754
755 list_for_each_entry(port, &team->port_list, list) {
756 if (!list_empty(&port->qom_list)) {
757 enabled = true;
758 break;
759 }
760 }
761 if (enabled == team->queue_override_enabled)
762 return;
763 netdev_dbg(team->dev, "%s queue override\n",
764 enabled ? "Enabling" : "Disabling");
765 team->queue_override_enabled = enabled;
766 }
767
768 static void team_queue_override_port_refresh(struct team *team,
769 struct team_port *port)
770 {
771 __team_queue_override_port_del(team, port);
772 __team_queue_override_port_add(team, port);
773 __team_queue_override_enabled_check(team);
774 }
775
776
777 /****************
778 * Port handling
779 ****************/
780
781 static bool team_port_find(const struct team *team,
782 const struct team_port *port)
783 {
784 struct team_port *cur;
785
786 list_for_each_entry(cur, &team->port_list, list)
787 if (cur == port)
788 return true;
789 return false;
790 }
791
792 /*
793 * Enable/disable port by adding to enabled port hashlist and setting
794 * port->index (Might be racy so reader could see incorrect ifindex when
795 * processing a flying packet, but that is not a problem). Write guarded
796 * by team->lock.
797 */
798 static void team_port_enable(struct team *team,
799 struct team_port *port)
800 {
801 if (team_port_enabled(port))
802 return;
803 port->index = team->en_port_count++;
804 hlist_add_head_rcu(&port->hlist,
805 team_port_index_hash(team, port->index));
806 team_adjust_ops(team);
807 team_queue_override_port_refresh(team, port);
808 if (team->ops.port_enabled)
809 team->ops.port_enabled(team, port);
810 }
811
812 static void __reconstruct_port_hlist(struct team *team, int rm_index)
813 {
814 int i;
815 struct team_port *port;
816
817 for (i = rm_index + 1; i < team->en_port_count; i++) {
818 port = team_get_port_by_index(team, i);
819 hlist_del_rcu(&port->hlist);
820 port->index--;
821 hlist_add_head_rcu(&port->hlist,
822 team_port_index_hash(team, port->index));
823 }
824 }
825
826 static void team_port_disable(struct team *team,
827 struct team_port *port)
828 {
829 if (!team_port_enabled(port))
830 return;
831 if (team->ops.port_disabled)
832 team->ops.port_disabled(team, port);
833 hlist_del_rcu(&port->hlist);
834 __reconstruct_port_hlist(team, port->index);
835 port->index = -1;
836 team_queue_override_port_refresh(team, port);
837 __team_adjust_ops(team, team->en_port_count - 1);
838 /*
839 * Wait until readers see adjusted ops. This ensures that
840 * readers never see team->en_port_count == 0
841 */
842 synchronize_rcu();
843 team->en_port_count--;
844 }
845
846 #define TEAM_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \
847 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
848 NETIF_F_HIGHDMA | NETIF_F_LRO)
849
850 static void __team_compute_features(struct team *team)
851 {
852 struct team_port *port;
853 u32 vlan_features = TEAM_VLAN_FEATURES;
854 unsigned short max_hard_header_len = ETH_HLEN;
855 unsigned int flags, dst_release_flag = IFF_XMIT_DST_RELEASE;
856
857 list_for_each_entry(port, &team->port_list, list) {
858 vlan_features = netdev_increment_features(vlan_features,
859 port->dev->vlan_features,
860 TEAM_VLAN_FEATURES);
861
862 dst_release_flag &= port->dev->priv_flags;
863 if (port->dev->hard_header_len > max_hard_header_len)
864 max_hard_header_len = port->dev->hard_header_len;
865 }
866
867 team->dev->vlan_features = vlan_features;
868 team->dev->hard_header_len = max_hard_header_len;
869
870 flags = team->dev->priv_flags & ~IFF_XMIT_DST_RELEASE;
871 team->dev->priv_flags = flags | dst_release_flag;
872
873 netdev_change_features(team->dev);
874 }
875
876 static void team_compute_features(struct team *team)
877 {
878 mutex_lock(&team->lock);
879 __team_compute_features(team);
880 mutex_unlock(&team->lock);
881 }
882
883 static int team_port_enter(struct team *team, struct team_port *port)
884 {
885 int err = 0;
886
887 dev_hold(team->dev);
888 port->dev->priv_flags |= IFF_TEAM_PORT;
889 if (team->ops.port_enter) {
890 err = team->ops.port_enter(team, port);
891 if (err) {
892 netdev_err(team->dev, "Device %s failed to enter team mode\n",
893 port->dev->name);
894 goto err_port_enter;
895 }
896 }
897
898 return 0;
899
900 err_port_enter:
901 port->dev->priv_flags &= ~IFF_TEAM_PORT;
902 dev_put(team->dev);
903
904 return err;
905 }
906
907 static void team_port_leave(struct team *team, struct team_port *port)
908 {
909 if (team->ops.port_leave)
910 team->ops.port_leave(team, port);
911 port->dev->priv_flags &= ~IFF_TEAM_PORT;
912 dev_put(team->dev);
913 }
914
915 #ifdef CONFIG_NET_POLL_CONTROLLER
916 static int team_port_enable_netpoll(struct team *team, struct team_port *port,
917 gfp_t gfp)
918 {
919 struct netpoll *np;
920 int err;
921
922 np = kzalloc(sizeof(*np), gfp);
923 if (!np)
924 return -ENOMEM;
925
926 err = __netpoll_setup(np, port->dev, gfp);
927 if (err) {
928 kfree(np);
929 return err;
930 }
931 port->np = np;
932 return err;
933 }
934
935 static void team_port_disable_netpoll(struct team_port *port)
936 {
937 struct netpoll *np = port->np;
938
939 if (!np)
940 return;
941 port->np = NULL;
942
943 /* Wait for transmitting packets to finish before freeing. */
944 synchronize_rcu_bh();
945 __netpoll_cleanup(np);
946 kfree(np);
947 }
948
949 static struct netpoll_info *team_netpoll_info(struct team *team)
950 {
951 return team->dev->npinfo;
952 }
953
954 #else
955 static int team_port_enable_netpoll(struct team *team, struct team_port *port,
956 gfp_t gfp)
957 {
958 return 0;
959 }
960 static void team_port_disable_netpoll(struct team_port *port)
961 {
962 }
963 static struct netpoll_info *team_netpoll_info(struct team *team)
964 {
965 return NULL;
966 }
967 #endif
968
969 static void __team_port_change_port_added(struct team_port *port, bool linkup);
970 static int team_dev_type_check_change(struct net_device *dev,
971 struct net_device *port_dev);
972
973 static int team_port_add(struct team *team, struct net_device *port_dev)
974 {
975 struct net_device *dev = team->dev;
976 struct team_port *port;
977 char *portname = port_dev->name;
978 int err;
979
980 if (port_dev->flags & IFF_LOOPBACK) {
981 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
982 portname);
983 return -EINVAL;
984 }
985
986 if (team_port_exists(port_dev)) {
987 netdev_err(dev, "Device %s is already a port "
988 "of a team device\n", portname);
989 return -EBUSY;
990 }
991
992 if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
993 vlan_uses_dev(dev)) {
994 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
995 portname);
996 return -EPERM;
997 }
998
999 err = team_dev_type_check_change(dev, port_dev);
1000 if (err)
1001 return err;
1002
1003 if (port_dev->flags & IFF_UP) {
1004 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1005 portname);
1006 return -EBUSY;
1007 }
1008
1009 port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1010 GFP_KERNEL);
1011 if (!port)
1012 return -ENOMEM;
1013
1014 port->dev = port_dev;
1015 port->team = team;
1016 INIT_LIST_HEAD(&port->qom_list);
1017
1018 port->orig.mtu = port_dev->mtu;
1019 err = dev_set_mtu(port_dev, dev->mtu);
1020 if (err) {
1021 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1022 goto err_set_mtu;
1023 }
1024
1025 memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1026
1027 err = team_port_enter(team, port);
1028 if (err) {
1029 netdev_err(dev, "Device %s failed to enter team mode\n",
1030 portname);
1031 goto err_port_enter;
1032 }
1033
1034 err = dev_open(port_dev);
1035 if (err) {
1036 netdev_dbg(dev, "Device %s opening failed\n",
1037 portname);
1038 goto err_dev_open;
1039 }
1040
1041 err = vlan_vids_add_by_dev(port_dev, dev);
1042 if (err) {
1043 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1044 portname);
1045 goto err_vids_add;
1046 }
1047
1048 if (team_netpoll_info(team)) {
1049 err = team_port_enable_netpoll(team, port, GFP_KERNEL);
1050 if (err) {
1051 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1052 portname);
1053 goto err_enable_netpoll;
1054 }
1055 }
1056
1057 err = netdev_set_master(port_dev, dev);
1058 if (err) {
1059 netdev_err(dev, "Device %s failed to set master\n", portname);
1060 goto err_set_master;
1061 }
1062
1063 err = netdev_rx_handler_register(port_dev, team_handle_frame,
1064 port);
1065 if (err) {
1066 netdev_err(dev, "Device %s failed to register rx_handler\n",
1067 portname);
1068 goto err_handler_register;
1069 }
1070
1071 err = __team_option_inst_add_port(team, port);
1072 if (err) {
1073 netdev_err(dev, "Device %s failed to add per-port options\n",
1074 portname);
1075 goto err_option_port_add;
1076 }
1077
1078 port->index = -1;
1079 team_port_enable(team, port);
1080 list_add_tail_rcu(&port->list, &team->port_list);
1081 __team_compute_features(team);
1082 __team_port_change_port_added(port, !!netif_carrier_ok(port_dev));
1083 __team_options_change_check(team);
1084
1085 netdev_info(dev, "Port device %s added\n", portname);
1086
1087 return 0;
1088
1089 err_option_port_add:
1090 netdev_rx_handler_unregister(port_dev);
1091
1092 err_handler_register:
1093 netdev_set_master(port_dev, NULL);
1094
1095 err_set_master:
1096 team_port_disable_netpoll(port);
1097
1098 err_enable_netpoll:
1099 vlan_vids_del_by_dev(port_dev, dev);
1100
1101 err_vids_add:
1102 dev_close(port_dev);
1103
1104 err_dev_open:
1105 team_port_leave(team, port);
1106 team_port_set_orig_dev_addr(port);
1107
1108 err_port_enter:
1109 dev_set_mtu(port_dev, port->orig.mtu);
1110
1111 err_set_mtu:
1112 kfree(port);
1113
1114 return err;
1115 }
1116
1117 static void __team_port_change_port_removed(struct team_port *port);
1118
1119 static int team_port_del(struct team *team, struct net_device *port_dev)
1120 {
1121 struct net_device *dev = team->dev;
1122 struct team_port *port;
1123 char *portname = port_dev->name;
1124
1125 port = team_port_get_rtnl(port_dev);
1126 if (!port || !team_port_find(team, port)) {
1127 netdev_err(dev, "Device %s does not act as a port of this team\n",
1128 portname);
1129 return -ENOENT;
1130 }
1131
1132 __team_option_inst_mark_removed_port(team, port);
1133 __team_options_change_check(team);
1134 __team_option_inst_del_port(team, port);
1135 __team_port_change_port_removed(port);
1136 team_port_disable(team, port);
1137 list_del_rcu(&port->list);
1138 netdev_rx_handler_unregister(port_dev);
1139 netdev_set_master(port_dev, NULL);
1140 team_port_disable_netpoll(port);
1141 vlan_vids_del_by_dev(port_dev, dev);
1142 dev_close(port_dev);
1143 team_port_leave(team, port);
1144 team_port_set_orig_dev_addr(port);
1145 dev_set_mtu(port_dev, port->orig.mtu);
1146 synchronize_rcu();
1147 kfree(port);
1148 netdev_info(dev, "Port device %s removed\n", portname);
1149 __team_compute_features(team);
1150
1151 return 0;
1152 }
1153
1154
1155 /*****************
1156 * Net device ops
1157 *****************/
1158
1159 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1160 {
1161 ctx->data.str_val = team->mode->kind;
1162 return 0;
1163 }
1164
1165 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1166 {
1167 return team_change_mode(team, ctx->data.str_val);
1168 }
1169
1170 static int team_port_en_option_get(struct team *team,
1171 struct team_gsetter_ctx *ctx)
1172 {
1173 struct team_port *port = ctx->info->port;
1174
1175 ctx->data.bool_val = team_port_enabled(port);
1176 return 0;
1177 }
1178
1179 static int team_port_en_option_set(struct team *team,
1180 struct team_gsetter_ctx *ctx)
1181 {
1182 struct team_port *port = ctx->info->port;
1183
1184 if (ctx->data.bool_val)
1185 team_port_enable(team, port);
1186 else
1187 team_port_disable(team, port);
1188 return 0;
1189 }
1190
1191 static int team_user_linkup_option_get(struct team *team,
1192 struct team_gsetter_ctx *ctx)
1193 {
1194 struct team_port *port = ctx->info->port;
1195
1196 ctx->data.bool_val = port->user.linkup;
1197 return 0;
1198 }
1199
1200 static int team_user_linkup_option_set(struct team *team,
1201 struct team_gsetter_ctx *ctx)
1202 {
1203 struct team_port *port = ctx->info->port;
1204
1205 port->user.linkup = ctx->data.bool_val;
1206 team_refresh_port_linkup(port);
1207 return 0;
1208 }
1209
1210 static int team_user_linkup_en_option_get(struct team *team,
1211 struct team_gsetter_ctx *ctx)
1212 {
1213 struct team_port *port = ctx->info->port;
1214
1215 ctx->data.bool_val = port->user.linkup_enabled;
1216 return 0;
1217 }
1218
1219 static int team_user_linkup_en_option_set(struct team *team,
1220 struct team_gsetter_ctx *ctx)
1221 {
1222 struct team_port *port = ctx->info->port;
1223
1224 port->user.linkup_enabled = ctx->data.bool_val;
1225 team_refresh_port_linkup(port);
1226 return 0;
1227 }
1228
1229 static int team_priority_option_get(struct team *team,
1230 struct team_gsetter_ctx *ctx)
1231 {
1232 struct team_port *port = ctx->info->port;
1233
1234 ctx->data.s32_val = port->priority;
1235 return 0;
1236 }
1237
1238 static int team_priority_option_set(struct team *team,
1239 struct team_gsetter_ctx *ctx)
1240 {
1241 struct team_port *port = ctx->info->port;
1242
1243 port->priority = ctx->data.s32_val;
1244 team_queue_override_port_refresh(team, port);
1245 return 0;
1246 }
1247
1248 static int team_queue_id_option_get(struct team *team,
1249 struct team_gsetter_ctx *ctx)
1250 {
1251 struct team_port *port = ctx->info->port;
1252
1253 ctx->data.u32_val = port->queue_id;
1254 return 0;
1255 }
1256
1257 static int team_queue_id_option_set(struct team *team,
1258 struct team_gsetter_ctx *ctx)
1259 {
1260 struct team_port *port = ctx->info->port;
1261
1262 if (port->queue_id == ctx->data.u32_val)
1263 return 0;
1264 if (ctx->data.u32_val >= team->dev->real_num_tx_queues)
1265 return -EINVAL;
1266 port->queue_id = ctx->data.u32_val;
1267 team_queue_override_port_refresh(team, port);
1268 return 0;
1269 }
1270
1271
1272 static const struct team_option team_options[] = {
1273 {
1274 .name = "mode",
1275 .type = TEAM_OPTION_TYPE_STRING,
1276 .getter = team_mode_option_get,
1277 .setter = team_mode_option_set,
1278 },
1279 {
1280 .name = "enabled",
1281 .type = TEAM_OPTION_TYPE_BOOL,
1282 .per_port = true,
1283 .getter = team_port_en_option_get,
1284 .setter = team_port_en_option_set,
1285 },
1286 {
1287 .name = "user_linkup",
1288 .type = TEAM_OPTION_TYPE_BOOL,
1289 .per_port = true,
1290 .getter = team_user_linkup_option_get,
1291 .setter = team_user_linkup_option_set,
1292 },
1293 {
1294 .name = "user_linkup_enabled",
1295 .type = TEAM_OPTION_TYPE_BOOL,
1296 .per_port = true,
1297 .getter = team_user_linkup_en_option_get,
1298 .setter = team_user_linkup_en_option_set,
1299 },
1300 {
1301 .name = "priority",
1302 .type = TEAM_OPTION_TYPE_S32,
1303 .per_port = true,
1304 .getter = team_priority_option_get,
1305 .setter = team_priority_option_set,
1306 },
1307 {
1308 .name = "queue_id",
1309 .type = TEAM_OPTION_TYPE_U32,
1310 .per_port = true,
1311 .getter = team_queue_id_option_get,
1312 .setter = team_queue_id_option_set,
1313 },
1314 };
1315
1316 static struct lock_class_key team_netdev_xmit_lock_key;
1317 static struct lock_class_key team_netdev_addr_lock_key;
1318 static struct lock_class_key team_tx_busylock_key;
1319
1320 static void team_set_lockdep_class_one(struct net_device *dev,
1321 struct netdev_queue *txq,
1322 void *unused)
1323 {
1324 lockdep_set_class(&txq->_xmit_lock, &team_netdev_xmit_lock_key);
1325 }
1326
1327 static void team_set_lockdep_class(struct net_device *dev)
1328 {
1329 lockdep_set_class(&dev->addr_list_lock, &team_netdev_addr_lock_key);
1330 netdev_for_each_tx_queue(dev, team_set_lockdep_class_one, NULL);
1331 dev->qdisc_tx_busylock = &team_tx_busylock_key;
1332 }
1333
1334 static int team_init(struct net_device *dev)
1335 {
1336 struct team *team = netdev_priv(dev);
1337 int i;
1338 int err;
1339
1340 team->dev = dev;
1341 mutex_init(&team->lock);
1342 team_set_no_mode(team);
1343
1344 team->pcpu_stats = alloc_percpu(struct team_pcpu_stats);
1345 if (!team->pcpu_stats)
1346 return -ENOMEM;
1347
1348 for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1349 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1350 INIT_LIST_HEAD(&team->port_list);
1351 err = team_queue_override_init(team);
1352 if (err)
1353 goto err_team_queue_override_init;
1354
1355 team_adjust_ops(team);
1356
1357 INIT_LIST_HEAD(&team->option_list);
1358 INIT_LIST_HEAD(&team->option_inst_list);
1359 err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1360 if (err)
1361 goto err_options_register;
1362 netif_carrier_off(dev);
1363
1364 team_set_lockdep_class(dev);
1365
1366 return 0;
1367
1368 err_options_register:
1369 team_queue_override_fini(team);
1370 err_team_queue_override_init:
1371 free_percpu(team->pcpu_stats);
1372
1373 return err;
1374 }
1375
1376 static void team_uninit(struct net_device *dev)
1377 {
1378 struct team *team = netdev_priv(dev);
1379 struct team_port *port;
1380 struct team_port *tmp;
1381
1382 mutex_lock(&team->lock);
1383 list_for_each_entry_safe(port, tmp, &team->port_list, list)
1384 team_port_del(team, port->dev);
1385
1386 __team_change_mode(team, NULL); /* cleanup */
1387 __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1388 team_queue_override_fini(team);
1389 mutex_unlock(&team->lock);
1390 }
1391
1392 static void team_destructor(struct net_device *dev)
1393 {
1394 struct team *team = netdev_priv(dev);
1395
1396 free_percpu(team->pcpu_stats);
1397 free_netdev(dev);
1398 }
1399
1400 static int team_open(struct net_device *dev)
1401 {
1402 netif_carrier_on(dev);
1403 return 0;
1404 }
1405
1406 static int team_close(struct net_device *dev)
1407 {
1408 netif_carrier_off(dev);
1409 return 0;
1410 }
1411
1412 /*
1413 * note: already called with rcu_read_lock
1414 */
1415 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1416 {
1417 struct team *team = netdev_priv(dev);
1418 bool tx_success;
1419 unsigned int len = skb->len;
1420
1421 tx_success = team_queue_override_transmit(team, skb);
1422 if (!tx_success)
1423 tx_success = team->ops.transmit(team, skb);
1424 if (tx_success) {
1425 struct team_pcpu_stats *pcpu_stats;
1426
1427 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1428 u64_stats_update_begin(&pcpu_stats->syncp);
1429 pcpu_stats->tx_packets++;
1430 pcpu_stats->tx_bytes += len;
1431 u64_stats_update_end(&pcpu_stats->syncp);
1432 } else {
1433 this_cpu_inc(team->pcpu_stats->tx_dropped);
1434 }
1435
1436 return NETDEV_TX_OK;
1437 }
1438
1439 static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb)
1440 {
1441 /*
1442 * This helper function exists to help dev_pick_tx get the correct
1443 * destination queue. Using a helper function skips a call to
1444 * skb_tx_hash and will put the skbs in the queue we expect on their
1445 * way down to the team driver.
1446 */
1447 u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1448
1449 /*
1450 * Save the original txq to restore before passing to the driver
1451 */
1452 qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1453
1454 if (unlikely(txq >= dev->real_num_tx_queues)) {
1455 do {
1456 txq -= dev->real_num_tx_queues;
1457 } while (txq >= dev->real_num_tx_queues);
1458 }
1459 return txq;
1460 }
1461
1462 static void team_change_rx_flags(struct net_device *dev, int change)
1463 {
1464 struct team *team = netdev_priv(dev);
1465 struct team_port *port;
1466 int inc;
1467
1468 rcu_read_lock();
1469 list_for_each_entry_rcu(port, &team->port_list, list) {
1470 if (change & IFF_PROMISC) {
1471 inc = dev->flags & IFF_PROMISC ? 1 : -1;
1472 dev_set_promiscuity(port->dev, inc);
1473 }
1474 if (change & IFF_ALLMULTI) {
1475 inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1476 dev_set_allmulti(port->dev, inc);
1477 }
1478 }
1479 rcu_read_unlock();
1480 }
1481
1482 static void team_set_rx_mode(struct net_device *dev)
1483 {
1484 struct team *team = netdev_priv(dev);
1485 struct team_port *port;
1486
1487 rcu_read_lock();
1488 list_for_each_entry_rcu(port, &team->port_list, list) {
1489 dev_uc_sync(port->dev, dev);
1490 dev_mc_sync(port->dev, dev);
1491 }
1492 rcu_read_unlock();
1493 }
1494
1495 static int team_set_mac_address(struct net_device *dev, void *p)
1496 {
1497 struct sockaddr *addr = p;
1498 struct team *team = netdev_priv(dev);
1499 struct team_port *port;
1500
1501 if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1502 return -EADDRNOTAVAIL;
1503 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1504 dev->addr_assign_type &= ~NET_ADDR_RANDOM;
1505 rcu_read_lock();
1506 list_for_each_entry_rcu(port, &team->port_list, list)
1507 if (team->ops.port_change_dev_addr)
1508 team->ops.port_change_dev_addr(team, port);
1509 rcu_read_unlock();
1510 return 0;
1511 }
1512
1513 static int team_change_mtu(struct net_device *dev, int new_mtu)
1514 {
1515 struct team *team = netdev_priv(dev);
1516 struct team_port *port;
1517 int err;
1518
1519 /*
1520 * Alhough this is reader, it's guarded by team lock. It's not possible
1521 * to traverse list in reverse under rcu_read_lock
1522 */
1523 mutex_lock(&team->lock);
1524 list_for_each_entry(port, &team->port_list, list) {
1525 err = dev_set_mtu(port->dev, new_mtu);
1526 if (err) {
1527 netdev_err(dev, "Device %s failed to change mtu",
1528 port->dev->name);
1529 goto unwind;
1530 }
1531 }
1532 mutex_unlock(&team->lock);
1533
1534 dev->mtu = new_mtu;
1535
1536 return 0;
1537
1538 unwind:
1539 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1540 dev_set_mtu(port->dev, dev->mtu);
1541 mutex_unlock(&team->lock);
1542
1543 return err;
1544 }
1545
1546 static struct rtnl_link_stats64 *
1547 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1548 {
1549 struct team *team = netdev_priv(dev);
1550 struct team_pcpu_stats *p;
1551 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1552 u32 rx_dropped = 0, tx_dropped = 0;
1553 unsigned int start;
1554 int i;
1555
1556 for_each_possible_cpu(i) {
1557 p = per_cpu_ptr(team->pcpu_stats, i);
1558 do {
1559 start = u64_stats_fetch_begin_bh(&p->syncp);
1560 rx_packets = p->rx_packets;
1561 rx_bytes = p->rx_bytes;
1562 rx_multicast = p->rx_multicast;
1563 tx_packets = p->tx_packets;
1564 tx_bytes = p->tx_bytes;
1565 } while (u64_stats_fetch_retry_bh(&p->syncp, start));
1566
1567 stats->rx_packets += rx_packets;
1568 stats->rx_bytes += rx_bytes;
1569 stats->multicast += rx_multicast;
1570 stats->tx_packets += tx_packets;
1571 stats->tx_bytes += tx_bytes;
1572 /*
1573 * rx_dropped & tx_dropped are u32, updated
1574 * without syncp protection.
1575 */
1576 rx_dropped += p->rx_dropped;
1577 tx_dropped += p->tx_dropped;
1578 }
1579 stats->rx_dropped = rx_dropped;
1580 stats->tx_dropped = tx_dropped;
1581 return stats;
1582 }
1583
1584 static int team_vlan_rx_add_vid(struct net_device *dev, uint16_t vid)
1585 {
1586 struct team *team = netdev_priv(dev);
1587 struct team_port *port;
1588 int err;
1589
1590 /*
1591 * Alhough this is reader, it's guarded by team lock. It's not possible
1592 * to traverse list in reverse under rcu_read_lock
1593 */
1594 mutex_lock(&team->lock);
1595 list_for_each_entry(port, &team->port_list, list) {
1596 err = vlan_vid_add(port->dev, vid);
1597 if (err)
1598 goto unwind;
1599 }
1600 mutex_unlock(&team->lock);
1601
1602 return 0;
1603
1604 unwind:
1605 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1606 vlan_vid_del(port->dev, vid);
1607 mutex_unlock(&team->lock);
1608
1609 return err;
1610 }
1611
1612 static int team_vlan_rx_kill_vid(struct net_device *dev, uint16_t vid)
1613 {
1614 struct team *team = netdev_priv(dev);
1615 struct team_port *port;
1616
1617 rcu_read_lock();
1618 list_for_each_entry_rcu(port, &team->port_list, list)
1619 vlan_vid_del(port->dev, vid);
1620 rcu_read_unlock();
1621
1622 return 0;
1623 }
1624
1625 #ifdef CONFIG_NET_POLL_CONTROLLER
1626 static void team_poll_controller(struct net_device *dev)
1627 {
1628 }
1629
1630 static void __team_netpoll_cleanup(struct team *team)
1631 {
1632 struct team_port *port;
1633
1634 list_for_each_entry(port, &team->port_list, list)
1635 team_port_disable_netpoll(port);
1636 }
1637
1638 static void team_netpoll_cleanup(struct net_device *dev)
1639 {
1640 struct team *team = netdev_priv(dev);
1641
1642 mutex_lock(&team->lock);
1643 __team_netpoll_cleanup(team);
1644 mutex_unlock(&team->lock);
1645 }
1646
1647 static int team_netpoll_setup(struct net_device *dev,
1648 struct netpoll_info *npifo, gfp_t gfp)
1649 {
1650 struct team *team = netdev_priv(dev);
1651 struct team_port *port;
1652 int err = 0;
1653
1654 mutex_lock(&team->lock);
1655 list_for_each_entry(port, &team->port_list, list) {
1656 err = team_port_enable_netpoll(team, port, gfp);
1657 if (err) {
1658 __team_netpoll_cleanup(team);
1659 break;
1660 }
1661 }
1662 mutex_unlock(&team->lock);
1663 return err;
1664 }
1665 #endif
1666
1667 static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
1668 {
1669 struct team *team = netdev_priv(dev);
1670 int err;
1671
1672 mutex_lock(&team->lock);
1673 err = team_port_add(team, port_dev);
1674 mutex_unlock(&team->lock);
1675 return err;
1676 }
1677
1678 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1679 {
1680 struct team *team = netdev_priv(dev);
1681 int err;
1682
1683 mutex_lock(&team->lock);
1684 err = team_port_del(team, port_dev);
1685 mutex_unlock(&team->lock);
1686 return err;
1687 }
1688
1689 static netdev_features_t team_fix_features(struct net_device *dev,
1690 netdev_features_t features)
1691 {
1692 struct team_port *port;
1693 struct team *team = netdev_priv(dev);
1694 netdev_features_t mask;
1695
1696 mask = features;
1697 features &= ~NETIF_F_ONE_FOR_ALL;
1698 features |= NETIF_F_ALL_FOR_ALL;
1699
1700 rcu_read_lock();
1701 list_for_each_entry_rcu(port, &team->port_list, list) {
1702 features = netdev_increment_features(features,
1703 port->dev->features,
1704 mask);
1705 }
1706 rcu_read_unlock();
1707 return features;
1708 }
1709
1710 static const struct net_device_ops team_netdev_ops = {
1711 .ndo_init = team_init,
1712 .ndo_uninit = team_uninit,
1713 .ndo_open = team_open,
1714 .ndo_stop = team_close,
1715 .ndo_start_xmit = team_xmit,
1716 .ndo_select_queue = team_select_queue,
1717 .ndo_change_rx_flags = team_change_rx_flags,
1718 .ndo_set_rx_mode = team_set_rx_mode,
1719 .ndo_set_mac_address = team_set_mac_address,
1720 .ndo_change_mtu = team_change_mtu,
1721 .ndo_get_stats64 = team_get_stats64,
1722 .ndo_vlan_rx_add_vid = team_vlan_rx_add_vid,
1723 .ndo_vlan_rx_kill_vid = team_vlan_rx_kill_vid,
1724 #ifdef CONFIG_NET_POLL_CONTROLLER
1725 .ndo_poll_controller = team_poll_controller,
1726 .ndo_netpoll_setup = team_netpoll_setup,
1727 .ndo_netpoll_cleanup = team_netpoll_cleanup,
1728 #endif
1729 .ndo_add_slave = team_add_slave,
1730 .ndo_del_slave = team_del_slave,
1731 .ndo_fix_features = team_fix_features,
1732 };
1733
1734
1735 /***********************
1736 * rt netlink interface
1737 ***********************/
1738
1739 static void team_setup_by_port(struct net_device *dev,
1740 struct net_device *port_dev)
1741 {
1742 dev->header_ops = port_dev->header_ops;
1743 dev->type = port_dev->type;
1744 dev->hard_header_len = port_dev->hard_header_len;
1745 dev->addr_len = port_dev->addr_len;
1746 dev->mtu = port_dev->mtu;
1747 memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
1748 memcpy(dev->dev_addr, port_dev->dev_addr, port_dev->addr_len);
1749 dev->addr_assign_type &= ~NET_ADDR_RANDOM;
1750 }
1751
1752 static int team_dev_type_check_change(struct net_device *dev,
1753 struct net_device *port_dev)
1754 {
1755 struct team *team = netdev_priv(dev);
1756 char *portname = port_dev->name;
1757 int err;
1758
1759 if (dev->type == port_dev->type)
1760 return 0;
1761 if (!list_empty(&team->port_list)) {
1762 netdev_err(dev, "Device %s is of different type\n", portname);
1763 return -EBUSY;
1764 }
1765 err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
1766 err = notifier_to_errno(err);
1767 if (err) {
1768 netdev_err(dev, "Refused to change device type\n");
1769 return err;
1770 }
1771 dev_uc_flush(dev);
1772 dev_mc_flush(dev);
1773 team_setup_by_port(dev, port_dev);
1774 call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
1775 return 0;
1776 }
1777
1778 static void team_setup(struct net_device *dev)
1779 {
1780 ether_setup(dev);
1781
1782 dev->netdev_ops = &team_netdev_ops;
1783 dev->destructor = team_destructor;
1784 dev->tx_queue_len = 0;
1785 dev->flags |= IFF_MULTICAST;
1786 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
1787
1788 /*
1789 * Indicate we support unicast address filtering. That way core won't
1790 * bring us to promisc mode in case a unicast addr is added.
1791 * Let this up to underlay drivers.
1792 */
1793 dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
1794
1795 dev->features |= NETIF_F_LLTX;
1796 dev->features |= NETIF_F_GRO;
1797 dev->hw_features = TEAM_VLAN_FEATURES |
1798 NETIF_F_HW_VLAN_TX |
1799 NETIF_F_HW_VLAN_RX |
1800 NETIF_F_HW_VLAN_FILTER;
1801
1802 dev->hw_features &= ~(NETIF_F_ALL_CSUM & ~NETIF_F_HW_CSUM);
1803 dev->features |= dev->hw_features;
1804 }
1805
1806 static int team_newlink(struct net *src_net, struct net_device *dev,
1807 struct nlattr *tb[], struct nlattr *data[])
1808 {
1809 int err;
1810
1811 if (tb[IFLA_ADDRESS] == NULL)
1812 eth_hw_addr_random(dev);
1813
1814 err = register_netdevice(dev);
1815 if (err)
1816 return err;
1817
1818 return 0;
1819 }
1820
1821 static int team_validate(struct nlattr *tb[], struct nlattr *data[])
1822 {
1823 if (tb[IFLA_ADDRESS]) {
1824 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
1825 return -EINVAL;
1826 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
1827 return -EADDRNOTAVAIL;
1828 }
1829 return 0;
1830 }
1831
1832 static unsigned int team_get_num_tx_queues(void)
1833 {
1834 return TEAM_DEFAULT_NUM_TX_QUEUES;
1835 }
1836
1837 static unsigned int team_get_num_rx_queues(void)
1838 {
1839 return TEAM_DEFAULT_NUM_RX_QUEUES;
1840 }
1841
1842 static struct rtnl_link_ops team_link_ops __read_mostly = {
1843 .kind = DRV_NAME,
1844 .priv_size = sizeof(struct team),
1845 .setup = team_setup,
1846 .newlink = team_newlink,
1847 .validate = team_validate,
1848 .get_num_tx_queues = team_get_num_tx_queues,
1849 .get_num_rx_queues = team_get_num_rx_queues,
1850 };
1851
1852
1853 /***********************************
1854 * Generic netlink custom interface
1855 ***********************************/
1856
1857 static struct genl_family team_nl_family = {
1858 .id = GENL_ID_GENERATE,
1859 .name = TEAM_GENL_NAME,
1860 .version = TEAM_GENL_VERSION,
1861 .maxattr = TEAM_ATTR_MAX,
1862 .netnsok = true,
1863 };
1864
1865 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
1866 [TEAM_ATTR_UNSPEC] = { .type = NLA_UNSPEC, },
1867 [TEAM_ATTR_TEAM_IFINDEX] = { .type = NLA_U32 },
1868 [TEAM_ATTR_LIST_OPTION] = { .type = NLA_NESTED },
1869 [TEAM_ATTR_LIST_PORT] = { .type = NLA_NESTED },
1870 };
1871
1872 static const struct nla_policy
1873 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
1874 [TEAM_ATTR_OPTION_UNSPEC] = { .type = NLA_UNSPEC, },
1875 [TEAM_ATTR_OPTION_NAME] = {
1876 .type = NLA_STRING,
1877 .len = TEAM_STRING_MAX_LEN,
1878 },
1879 [TEAM_ATTR_OPTION_CHANGED] = { .type = NLA_FLAG },
1880 [TEAM_ATTR_OPTION_TYPE] = { .type = NLA_U8 },
1881 [TEAM_ATTR_OPTION_DATA] = { .type = NLA_BINARY },
1882 };
1883
1884 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
1885 {
1886 struct sk_buff *msg;
1887 void *hdr;
1888 int err;
1889
1890 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1891 if (!msg)
1892 return -ENOMEM;
1893
1894 hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
1895 &team_nl_family, 0, TEAM_CMD_NOOP);
1896 if (!hdr) {
1897 err = -EMSGSIZE;
1898 goto err_msg_put;
1899 }
1900
1901 genlmsg_end(msg, hdr);
1902
1903 return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
1904
1905 err_msg_put:
1906 nlmsg_free(msg);
1907
1908 return err;
1909 }
1910
1911 /*
1912 * Netlink cmd functions should be locked by following two functions.
1913 * Since dev gets held here, that ensures dev won't disappear in between.
1914 */
1915 static struct team *team_nl_team_get(struct genl_info *info)
1916 {
1917 struct net *net = genl_info_net(info);
1918 int ifindex;
1919 struct net_device *dev;
1920 struct team *team;
1921
1922 if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
1923 return NULL;
1924
1925 ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
1926 dev = dev_get_by_index(net, ifindex);
1927 if (!dev || dev->netdev_ops != &team_netdev_ops) {
1928 if (dev)
1929 dev_put(dev);
1930 return NULL;
1931 }
1932
1933 team = netdev_priv(dev);
1934 mutex_lock(&team->lock);
1935 return team;
1936 }
1937
1938 static void team_nl_team_put(struct team *team)
1939 {
1940 mutex_unlock(&team->lock);
1941 dev_put(team->dev);
1942 }
1943
1944 static int team_nl_send_generic(struct genl_info *info, struct team *team,
1945 int (*fill_func)(struct sk_buff *skb,
1946 struct genl_info *info,
1947 int flags, struct team *team))
1948 {
1949 struct sk_buff *skb;
1950 int err;
1951
1952 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1953 if (!skb)
1954 return -ENOMEM;
1955
1956 err = fill_func(skb, info, NLM_F_ACK, team);
1957 if (err < 0)
1958 goto err_fill;
1959
1960 err = genlmsg_unicast(genl_info_net(info), skb, info->snd_portid);
1961 return err;
1962
1963 err_fill:
1964 nlmsg_free(skb);
1965 return err;
1966 }
1967
1968 typedef int team_nl_send_func_t(struct sk_buff *skb,
1969 struct team *team, u32 portid);
1970
1971 static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
1972 {
1973 return genlmsg_unicast(dev_net(team->dev), skb, portid);
1974 }
1975
1976 static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
1977 struct team_option_inst *opt_inst)
1978 {
1979 struct nlattr *option_item;
1980 struct team_option *option = opt_inst->option;
1981 struct team_option_inst_info *opt_inst_info = &opt_inst->info;
1982 struct team_gsetter_ctx ctx;
1983 int err;
1984
1985 ctx.info = opt_inst_info;
1986 err = team_option_get(team, opt_inst, &ctx);
1987 if (err)
1988 return err;
1989
1990 option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
1991 if (!option_item)
1992 return -EMSGSIZE;
1993
1994 if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
1995 goto nest_cancel;
1996 if (opt_inst_info->port &&
1997 nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
1998 opt_inst_info->port->dev->ifindex))
1999 goto nest_cancel;
2000 if (opt_inst->option->array_size &&
2001 nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2002 opt_inst_info->array_index))
2003 goto nest_cancel;
2004
2005 switch (option->type) {
2006 case TEAM_OPTION_TYPE_U32:
2007 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2008 goto nest_cancel;
2009 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2010 goto nest_cancel;
2011 break;
2012 case TEAM_OPTION_TYPE_STRING:
2013 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2014 goto nest_cancel;
2015 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2016 ctx.data.str_val))
2017 goto nest_cancel;
2018 break;
2019 case TEAM_OPTION_TYPE_BINARY:
2020 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2021 goto nest_cancel;
2022 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2023 ctx.data.bin_val.ptr))
2024 goto nest_cancel;
2025 break;
2026 case TEAM_OPTION_TYPE_BOOL:
2027 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2028 goto nest_cancel;
2029 if (ctx.data.bool_val &&
2030 nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2031 goto nest_cancel;
2032 break;
2033 case TEAM_OPTION_TYPE_S32:
2034 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2035 goto nest_cancel;
2036 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2037 goto nest_cancel;
2038 break;
2039 default:
2040 BUG();
2041 }
2042 if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2043 goto nest_cancel;
2044 if (opt_inst->changed) {
2045 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2046 goto nest_cancel;
2047 opt_inst->changed = false;
2048 }
2049 nla_nest_end(skb, option_item);
2050 return 0;
2051
2052 nest_cancel:
2053 nla_nest_cancel(skb, option_item);
2054 return -EMSGSIZE;
2055 }
2056
2057 static int __send_and_alloc_skb(struct sk_buff **pskb,
2058 struct team *team, u32 portid,
2059 team_nl_send_func_t *send_func)
2060 {
2061 int err;
2062
2063 if (*pskb) {
2064 err = send_func(*pskb, team, portid);
2065 if (err)
2066 return err;
2067 }
2068 *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2069 if (!*pskb)
2070 return -ENOMEM;
2071 return 0;
2072 }
2073
2074 static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2075 int flags, team_nl_send_func_t *send_func,
2076 struct list_head *sel_opt_inst_list)
2077 {
2078 struct nlattr *option_list;
2079 struct nlmsghdr *nlh;
2080 void *hdr;
2081 struct team_option_inst *opt_inst;
2082 int err;
2083 struct sk_buff *skb = NULL;
2084 bool incomplete;
2085 int i;
2086
2087 opt_inst = list_first_entry(sel_opt_inst_list,
2088 struct team_option_inst, tmp_list);
2089
2090 start_again:
2091 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2092 if (err)
2093 return err;
2094
2095 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2096 TEAM_CMD_OPTIONS_GET);
2097 if (!hdr)
2098 return -EMSGSIZE;
2099
2100 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2101 goto nla_put_failure;
2102 option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2103 if (!option_list)
2104 goto nla_put_failure;
2105
2106 i = 0;
2107 incomplete = false;
2108 list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2109 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2110 if (err) {
2111 if (err == -EMSGSIZE) {
2112 if (!i)
2113 goto errout;
2114 incomplete = true;
2115 break;
2116 }
2117 goto errout;
2118 }
2119 i++;
2120 }
2121
2122 nla_nest_end(skb, option_list);
2123 genlmsg_end(skb, hdr);
2124 if (incomplete)
2125 goto start_again;
2126
2127 send_done:
2128 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2129 if (!nlh) {
2130 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2131 if (err)
2132 goto errout;
2133 goto send_done;
2134 }
2135
2136 return send_func(skb, team, portid);
2137
2138 nla_put_failure:
2139 err = -EMSGSIZE;
2140 errout:
2141 genlmsg_cancel(skb, hdr);
2142 nlmsg_free(skb);
2143 return err;
2144 }
2145
2146 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2147 {
2148 struct team *team;
2149 struct team_option_inst *opt_inst;
2150 int err;
2151 LIST_HEAD(sel_opt_inst_list);
2152
2153 team = team_nl_team_get(info);
2154 if (!team)
2155 return -EINVAL;
2156
2157 list_for_each_entry(opt_inst, &team->option_inst_list, list)
2158 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2159 err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2160 NLM_F_ACK, team_nl_send_unicast,
2161 &sel_opt_inst_list);
2162
2163 team_nl_team_put(team);
2164
2165 return err;
2166 }
2167
2168 static int team_nl_send_event_options_get(struct team *team,
2169 struct list_head *sel_opt_inst_list);
2170
2171 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2172 {
2173 struct team *team;
2174 int err = 0;
2175 int i;
2176 struct nlattr *nl_option;
2177 LIST_HEAD(opt_inst_list);
2178
2179 team = team_nl_team_get(info);
2180 if (!team)
2181 return -EINVAL;
2182
2183 err = -EINVAL;
2184 if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2185 err = -EINVAL;
2186 goto team_put;
2187 }
2188
2189 nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2190 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2191 struct nlattr *attr;
2192 struct nlattr *attr_data;
2193 enum team_option_type opt_type;
2194 int opt_port_ifindex = 0; /* != 0 for per-port options */
2195 u32 opt_array_index = 0;
2196 bool opt_is_array = false;
2197 struct team_option_inst *opt_inst;
2198 char *opt_name;
2199 bool opt_found = false;
2200
2201 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2202 err = -EINVAL;
2203 goto team_put;
2204 }
2205 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2206 nl_option, team_nl_option_policy);
2207 if (err)
2208 goto team_put;
2209 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2210 !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2211 err = -EINVAL;
2212 goto team_put;
2213 }
2214 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2215 case NLA_U32:
2216 opt_type = TEAM_OPTION_TYPE_U32;
2217 break;
2218 case NLA_STRING:
2219 opt_type = TEAM_OPTION_TYPE_STRING;
2220 break;
2221 case NLA_BINARY:
2222 opt_type = TEAM_OPTION_TYPE_BINARY;
2223 break;
2224 case NLA_FLAG:
2225 opt_type = TEAM_OPTION_TYPE_BOOL;
2226 break;
2227 case NLA_S32:
2228 opt_type = TEAM_OPTION_TYPE_S32;
2229 break;
2230 default:
2231 goto team_put;
2232 }
2233
2234 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2235 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2236 err = -EINVAL;
2237 goto team_put;
2238 }
2239
2240 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2241 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2242 if (attr)
2243 opt_port_ifindex = nla_get_u32(attr);
2244
2245 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2246 if (attr) {
2247 opt_is_array = true;
2248 opt_array_index = nla_get_u32(attr);
2249 }
2250
2251 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2252 struct team_option *option = opt_inst->option;
2253 struct team_gsetter_ctx ctx;
2254 struct team_option_inst_info *opt_inst_info;
2255 int tmp_ifindex;
2256
2257 opt_inst_info = &opt_inst->info;
2258 tmp_ifindex = opt_inst_info->port ?
2259 opt_inst_info->port->dev->ifindex : 0;
2260 if (option->type != opt_type ||
2261 strcmp(option->name, opt_name) ||
2262 tmp_ifindex != opt_port_ifindex ||
2263 (option->array_size && !opt_is_array) ||
2264 opt_inst_info->array_index != opt_array_index)
2265 continue;
2266 opt_found = true;
2267 ctx.info = opt_inst_info;
2268 switch (opt_type) {
2269 case TEAM_OPTION_TYPE_U32:
2270 ctx.data.u32_val = nla_get_u32(attr_data);
2271 break;
2272 case TEAM_OPTION_TYPE_STRING:
2273 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2274 err = -EINVAL;
2275 goto team_put;
2276 }
2277 ctx.data.str_val = nla_data(attr_data);
2278 break;
2279 case TEAM_OPTION_TYPE_BINARY:
2280 ctx.data.bin_val.len = nla_len(attr_data);
2281 ctx.data.bin_val.ptr = nla_data(attr_data);
2282 break;
2283 case TEAM_OPTION_TYPE_BOOL:
2284 ctx.data.bool_val = attr_data ? true : false;
2285 break;
2286 case TEAM_OPTION_TYPE_S32:
2287 ctx.data.s32_val = nla_get_s32(attr_data);
2288 break;
2289 default:
2290 BUG();
2291 }
2292 err = team_option_set(team, opt_inst, &ctx);
2293 if (err)
2294 goto team_put;
2295 opt_inst->changed = true;
2296 list_add(&opt_inst->tmp_list, &opt_inst_list);
2297 }
2298 if (!opt_found) {
2299 err = -ENOENT;
2300 goto team_put;
2301 }
2302 }
2303
2304 err = team_nl_send_event_options_get(team, &opt_inst_list);
2305
2306 team_put:
2307 team_nl_team_put(team);
2308
2309 return err;
2310 }
2311
2312 static int team_nl_fill_port_list_get(struct sk_buff *skb,
2313 u32 portid, u32 seq, int flags,
2314 struct team *team,
2315 bool fillall)
2316 {
2317 struct nlattr *port_list;
2318 void *hdr;
2319 struct team_port *port;
2320
2321 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags,
2322 TEAM_CMD_PORT_LIST_GET);
2323 if (!hdr)
2324 return -EMSGSIZE;
2325
2326 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2327 goto nla_put_failure;
2328 port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2329 if (!port_list)
2330 goto nla_put_failure;
2331
2332 list_for_each_entry(port, &team->port_list, list) {
2333 struct nlattr *port_item;
2334
2335 /* Include only changed ports if fill all mode is not on */
2336 if (!fillall && !port->changed)
2337 continue;
2338 port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2339 if (!port_item)
2340 goto nla_put_failure;
2341 if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2342 goto nla_put_failure;
2343 if (port->changed) {
2344 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2345 goto nla_put_failure;
2346 port->changed = false;
2347 }
2348 if ((port->removed &&
2349 nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2350 (port->state.linkup &&
2351 nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2352 nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2353 nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2354 goto nla_put_failure;
2355 nla_nest_end(skb, port_item);
2356 }
2357
2358 nla_nest_end(skb, port_list);
2359 return genlmsg_end(skb, hdr);
2360
2361 nla_put_failure:
2362 genlmsg_cancel(skb, hdr);
2363 return -EMSGSIZE;
2364 }
2365
2366 static int team_nl_fill_port_list_get_all(struct sk_buff *skb,
2367 struct genl_info *info, int flags,
2368 struct team *team)
2369 {
2370 return team_nl_fill_port_list_get(skb, info->snd_portid,
2371 info->snd_seq, NLM_F_ACK,
2372 team, true);
2373 }
2374
2375 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2376 struct genl_info *info)
2377 {
2378 struct team *team;
2379 int err;
2380
2381 team = team_nl_team_get(info);
2382 if (!team)
2383 return -EINVAL;
2384
2385 err = team_nl_send_generic(info, team, team_nl_fill_port_list_get_all);
2386
2387 team_nl_team_put(team);
2388
2389 return err;
2390 }
2391
2392 static struct genl_ops team_nl_ops[] = {
2393 {
2394 .cmd = TEAM_CMD_NOOP,
2395 .doit = team_nl_cmd_noop,
2396 .policy = team_nl_policy,
2397 },
2398 {
2399 .cmd = TEAM_CMD_OPTIONS_SET,
2400 .doit = team_nl_cmd_options_set,
2401 .policy = team_nl_policy,
2402 .flags = GENL_ADMIN_PERM,
2403 },
2404 {
2405 .cmd = TEAM_CMD_OPTIONS_GET,
2406 .doit = team_nl_cmd_options_get,
2407 .policy = team_nl_policy,
2408 .flags = GENL_ADMIN_PERM,
2409 },
2410 {
2411 .cmd = TEAM_CMD_PORT_LIST_GET,
2412 .doit = team_nl_cmd_port_list_get,
2413 .policy = team_nl_policy,
2414 .flags = GENL_ADMIN_PERM,
2415 },
2416 };
2417
2418 static struct genl_multicast_group team_change_event_mcgrp = {
2419 .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME,
2420 };
2421
2422 static int team_nl_send_multicast(struct sk_buff *skb,
2423 struct team *team, u32 portid)
2424 {
2425 return genlmsg_multicast_netns(dev_net(team->dev), skb, 0,
2426 team_change_event_mcgrp.id, GFP_KERNEL);
2427 }
2428
2429 static int team_nl_send_event_options_get(struct team *team,
2430 struct list_head *sel_opt_inst_list)
2431 {
2432 return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2433 sel_opt_inst_list);
2434 }
2435
2436 static int team_nl_send_event_port_list_get(struct team *team)
2437 {
2438 struct sk_buff *skb;
2439 int err;
2440 struct net *net = dev_net(team->dev);
2441
2442 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2443 if (!skb)
2444 return -ENOMEM;
2445
2446 err = team_nl_fill_port_list_get(skb, 0, 0, 0, team, false);
2447 if (err < 0)
2448 goto err_fill;
2449
2450 err = genlmsg_multicast_netns(net, skb, 0, team_change_event_mcgrp.id,
2451 GFP_KERNEL);
2452 return err;
2453
2454 err_fill:
2455 nlmsg_free(skb);
2456 return err;
2457 }
2458
2459 static int team_nl_init(void)
2460 {
2461 int err;
2462
2463 err = genl_register_family_with_ops(&team_nl_family, team_nl_ops,
2464 ARRAY_SIZE(team_nl_ops));
2465 if (err)
2466 return err;
2467
2468 err = genl_register_mc_group(&team_nl_family, &team_change_event_mcgrp);
2469 if (err)
2470 goto err_change_event_grp_reg;
2471
2472 return 0;
2473
2474 err_change_event_grp_reg:
2475 genl_unregister_family(&team_nl_family);
2476
2477 return err;
2478 }
2479
2480 static void team_nl_fini(void)
2481 {
2482 genl_unregister_family(&team_nl_family);
2483 }
2484
2485
2486 /******************
2487 * Change checkers
2488 ******************/
2489
2490 static void __team_options_change_check(struct team *team)
2491 {
2492 int err;
2493 struct team_option_inst *opt_inst;
2494 LIST_HEAD(sel_opt_inst_list);
2495
2496 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2497 if (opt_inst->changed)
2498 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2499 }
2500 err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2501 if (err && err != -ESRCH)
2502 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2503 err);
2504 }
2505
2506 /* rtnl lock is held */
2507
2508 static void __team_port_change_send(struct team_port *port, bool linkup)
2509 {
2510 int err;
2511
2512 port->changed = true;
2513 port->state.linkup = linkup;
2514 team_refresh_port_linkup(port);
2515 if (linkup) {
2516 struct ethtool_cmd ecmd;
2517
2518 err = __ethtool_get_settings(port->dev, &ecmd);
2519 if (!err) {
2520 port->state.speed = ethtool_cmd_speed(&ecmd);
2521 port->state.duplex = ecmd.duplex;
2522 goto send_event;
2523 }
2524 }
2525 port->state.speed = 0;
2526 port->state.duplex = 0;
2527
2528 send_event:
2529 err = team_nl_send_event_port_list_get(port->team);
2530 if (err && err != -ESRCH)
2531 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2532 port->dev->name, err);
2533
2534 }
2535
2536 static void __team_port_change_check(struct team_port *port, bool linkup)
2537 {
2538 if (port->state.linkup != linkup)
2539 __team_port_change_send(port, linkup);
2540 }
2541
2542 static void __team_port_change_port_added(struct team_port *port, bool linkup)
2543 {
2544 __team_port_change_send(port, linkup);
2545 }
2546
2547 static void __team_port_change_port_removed(struct team_port *port)
2548 {
2549 port->removed = true;
2550 __team_port_change_send(port, false);
2551 }
2552
2553 static void team_port_change_check(struct team_port *port, bool linkup)
2554 {
2555 struct team *team = port->team;
2556
2557 mutex_lock(&team->lock);
2558 __team_port_change_check(port, linkup);
2559 mutex_unlock(&team->lock);
2560 }
2561
2562
2563 /************************************
2564 * Net device notifier event handler
2565 ************************************/
2566
2567 static int team_device_event(struct notifier_block *unused,
2568 unsigned long event, void *ptr)
2569 {
2570 struct net_device *dev = (struct net_device *) ptr;
2571 struct team_port *port;
2572
2573 port = team_port_get_rtnl(dev);
2574 if (!port)
2575 return NOTIFY_DONE;
2576
2577 switch (event) {
2578 case NETDEV_UP:
2579 if (netif_carrier_ok(dev))
2580 team_port_change_check(port, true);
2581 case NETDEV_DOWN:
2582 team_port_change_check(port, false);
2583 case NETDEV_CHANGE:
2584 if (netif_running(port->dev))
2585 team_port_change_check(port,
2586 !!netif_carrier_ok(port->dev));
2587 break;
2588 case NETDEV_UNREGISTER:
2589 team_del_slave(port->team->dev, dev);
2590 break;
2591 case NETDEV_FEAT_CHANGE:
2592 team_compute_features(port->team);
2593 break;
2594 case NETDEV_CHANGEMTU:
2595 /* Forbid to change mtu of underlaying device */
2596 return NOTIFY_BAD;
2597 case NETDEV_PRE_TYPE_CHANGE:
2598 /* Forbid to change type of underlaying device */
2599 return NOTIFY_BAD;
2600 }
2601 return NOTIFY_DONE;
2602 }
2603
2604 static struct notifier_block team_notifier_block __read_mostly = {
2605 .notifier_call = team_device_event,
2606 };
2607
2608
2609 /***********************
2610 * Module init and exit
2611 ***********************/
2612
2613 static int __init team_module_init(void)
2614 {
2615 int err;
2616
2617 register_netdevice_notifier(&team_notifier_block);
2618
2619 err = rtnl_link_register(&team_link_ops);
2620 if (err)
2621 goto err_rtnl_reg;
2622
2623 err = team_nl_init();
2624 if (err)
2625 goto err_nl_init;
2626
2627 return 0;
2628
2629 err_nl_init:
2630 rtnl_link_unregister(&team_link_ops);
2631
2632 err_rtnl_reg:
2633 unregister_netdevice_notifier(&team_notifier_block);
2634
2635 return err;
2636 }
2637
2638 static void __exit team_module_exit(void)
2639 {
2640 team_nl_fini();
2641 rtnl_link_unregister(&team_link_ops);
2642 unregister_netdevice_notifier(&team_notifier_block);
2643 }
2644
2645 module_init(team_module_init);
2646 module_exit(team_module_exit);
2647
2648 MODULE_LICENSE("GPL v2");
2649 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
2650 MODULE_DESCRIPTION("Ethernet team device driver");
2651 MODULE_ALIAS_RTNL_LINK(DRV_NAME);
Linux kernel - Deliverables
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