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Merge tag 'v3.10.108' into update
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / net / team / team.c
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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
43static struct team_port *team_port_get_rcu(const struct net_device *dev)
44{
45 return rcu_dereference(dev->rx_handler_data);
46}
47
48static struct team_port *team_port_get_rtnl(const struct net_device *dev)
49{
50 struct team_port *port = rtnl_dereference(dev->rx_handler_data);
51
52 return team_port_exists(dev) ? port : NULL;
53}
54
55/*
56 * Since the ability to change device address for open port device is tested in
57 * team_port_add, this function can be called without control of return value
58 */
59static int __set_port_dev_addr(struct net_device *port_dev,
60 const unsigned char *dev_addr)
61{
62 struct sockaddr addr;
63
64 memcpy(addr.sa_data, dev_addr, port_dev->addr_len);
65 addr.sa_family = port_dev->type;
66 return dev_set_mac_address(port_dev, &addr);
67}
68
69static int team_port_set_orig_dev_addr(struct team_port *port)
70{
71 return __set_port_dev_addr(port->dev, port->orig.dev_addr);
72}
73
74static int team_port_set_team_dev_addr(struct team *team,
75 struct team_port *port)
76{
77 return __set_port_dev_addr(port->dev, team->dev->dev_addr);
78}
79
80int team_modeop_port_enter(struct team *team, struct team_port *port)
81{
82 return team_port_set_team_dev_addr(team, port);
83}
84EXPORT_SYMBOL(team_modeop_port_enter);
85
86void team_modeop_port_change_dev_addr(struct team *team,
87 struct team_port *port)
88{
89 team_port_set_team_dev_addr(team, port);
90}
91EXPORT_SYMBOL(team_modeop_port_change_dev_addr);
92
93static void team_refresh_port_linkup(struct team_port *port)
94{
95 port->linkup = port->user.linkup_enabled ? port->user.linkup :
96 port->state.linkup;
97}
98
99
100/*******************
101 * Options handling
102 *******************/
103
104struct team_option_inst { /* One for each option instance */
105 struct list_head list;
106 struct list_head tmp_list;
107 struct team_option *option;
108 struct team_option_inst_info info;
109 bool changed;
110 bool removed;
111};
112
113static struct team_option *__team_find_option(struct team *team,
114 const char *opt_name)
115{
116 struct team_option *option;
117
118 list_for_each_entry(option, &team->option_list, list) {
119 if (strcmp(option->name, opt_name) == 0)
120 return option;
121 }
122 return NULL;
123}
124
125static void __team_option_inst_del(struct team_option_inst *opt_inst)
126{
127 list_del(&opt_inst->list);
128 kfree(opt_inst);
129}
130
131static void __team_option_inst_del_option(struct team *team,
132 struct team_option *option)
133{
134 struct team_option_inst *opt_inst, *tmp;
135
136 list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
137 if (opt_inst->option == option)
138 __team_option_inst_del(opt_inst);
139 }
140}
141
142static int __team_option_inst_add(struct team *team, struct team_option *option,
143 struct team_port *port)
144{
145 struct team_option_inst *opt_inst;
146 unsigned int array_size;
147 unsigned int i;
148 int err;
149
150 array_size = option->array_size;
151 if (!array_size)
152 array_size = 1; /* No array but still need one instance */
153
154 for (i = 0; i < array_size; i++) {
155 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL);
156 if (!opt_inst)
157 return -ENOMEM;
158 opt_inst->option = option;
159 opt_inst->info.port = port;
160 opt_inst->info.array_index = i;
161 opt_inst->changed = true;
162 opt_inst->removed = false;
163 list_add_tail(&opt_inst->list, &team->option_inst_list);
164 if (option->init) {
165 err = option->init(team, &opt_inst->info);
166 if (err)
167 return err;
168 }
169
170 }
171 return 0;
172}
173
174static int __team_option_inst_add_option(struct team *team,
175 struct team_option *option)
176{
177 struct team_port *port;
178 int err;
179
180 if (!option->per_port) {
181 err = __team_option_inst_add(team, option, NULL);
182 if (err)
183 goto inst_del_option;
184 }
185
186 list_for_each_entry(port, &team->port_list, list) {
187 err = __team_option_inst_add(team, option, port);
188 if (err)
189 goto inst_del_option;
190 }
191 return 0;
192
193inst_del_option:
194 __team_option_inst_del_option(team, option);
195 return err;
196}
197
198static void __team_option_inst_mark_removed_option(struct team *team,
199 struct team_option *option)
200{
201 struct team_option_inst *opt_inst;
202
203 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
204 if (opt_inst->option == option) {
205 opt_inst->changed = true;
206 opt_inst->removed = true;
207 }
208 }
209}
210
211static void __team_option_inst_del_port(struct team *team,
212 struct team_port *port)
213{
214 struct team_option_inst *opt_inst, *tmp;
215
216 list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
217 if (opt_inst->option->per_port &&
218 opt_inst->info.port == port)
219 __team_option_inst_del(opt_inst);
220 }
221}
222
223static int __team_option_inst_add_port(struct team *team,
224 struct team_port *port)
225{
226 struct team_option *option;
227 int err;
228
229 list_for_each_entry(option, &team->option_list, list) {
230 if (!option->per_port)
231 continue;
232 err = __team_option_inst_add(team, option, port);
233 if (err)
234 goto inst_del_port;
235 }
236 return 0;
237
238inst_del_port:
239 __team_option_inst_del_port(team, port);
240 return err;
241}
242
243static void __team_option_inst_mark_removed_port(struct team *team,
244 struct team_port *port)
245{
246 struct team_option_inst *opt_inst;
247
248 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
249 if (opt_inst->info.port == port) {
250 opt_inst->changed = true;
251 opt_inst->removed = true;
252 }
253 }
254}
255
256static int __team_options_register(struct team *team,
257 const struct team_option *option,
258 size_t option_count)
259{
260 int i;
261 struct team_option **dst_opts;
262 int err;
263
264 dst_opts = kzalloc(sizeof(struct team_option *) * option_count,
265 GFP_KERNEL);
266 if (!dst_opts)
267 return -ENOMEM;
268 for (i = 0; i < option_count; i++, option++) {
269 if (__team_find_option(team, option->name)) {
270 err = -EEXIST;
271 goto alloc_rollback;
272 }
273 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
274 if (!dst_opts[i]) {
275 err = -ENOMEM;
276 goto alloc_rollback;
277 }
278 }
279
280 for (i = 0; i < option_count; i++) {
281 err = __team_option_inst_add_option(team, dst_opts[i]);
282 if (err)
283 goto inst_rollback;
284 list_add_tail(&dst_opts[i]->list, &team->option_list);
285 }
286
287 kfree(dst_opts);
288 return 0;
289
290inst_rollback:
291 for (i--; i >= 0; i--)
292 __team_option_inst_del_option(team, dst_opts[i]);
293
294 i = option_count - 1;
295alloc_rollback:
296 for (i--; i >= 0; i--)
297 kfree(dst_opts[i]);
298
299 kfree(dst_opts);
300 return err;
301}
302
303static void __team_options_mark_removed(struct team *team,
304 const struct team_option *option,
305 size_t option_count)
306{
307 int i;
308
309 for (i = 0; i < option_count; i++, option++) {
310 struct team_option *del_opt;
311
312 del_opt = __team_find_option(team, option->name);
313 if (del_opt)
314 __team_option_inst_mark_removed_option(team, del_opt);
315 }
316}
317
318static void __team_options_unregister(struct team *team,
319 const struct team_option *option,
320 size_t option_count)
321{
322 int i;
323
324 for (i = 0; i < option_count; i++, option++) {
325 struct team_option *del_opt;
326
327 del_opt = __team_find_option(team, option->name);
328 if (del_opt) {
329 __team_option_inst_del_option(team, del_opt);
330 list_del(&del_opt->list);
331 kfree(del_opt);
332 }
333 }
334}
335
336static void __team_options_change_check(struct team *team);
337
338int team_options_register(struct team *team,
339 const struct team_option *option,
340 size_t option_count)
341{
342 int err;
343
344 err = __team_options_register(team, option, option_count);
345 if (err)
346 return err;
347 __team_options_change_check(team);
348 return 0;
349}
350EXPORT_SYMBOL(team_options_register);
351
352void team_options_unregister(struct team *team,
353 const struct team_option *option,
354 size_t option_count)
355{
356 __team_options_mark_removed(team, option, option_count);
357 __team_options_change_check(team);
358 __team_options_unregister(team, option, option_count);
359}
360EXPORT_SYMBOL(team_options_unregister);
361
362static int team_option_get(struct team *team,
363 struct team_option_inst *opt_inst,
364 struct team_gsetter_ctx *ctx)
365{
366 if (!opt_inst->option->getter)
367 return -EOPNOTSUPP;
368 return opt_inst->option->getter(team, ctx);
369}
370
371static int team_option_set(struct team *team,
372 struct team_option_inst *opt_inst,
373 struct team_gsetter_ctx *ctx)
374{
375 if (!opt_inst->option->setter)
376 return -EOPNOTSUPP;
377 return opt_inst->option->setter(team, ctx);
378}
379
380void team_option_inst_set_change(struct team_option_inst_info *opt_inst_info)
381{
382 struct team_option_inst *opt_inst;
383
384 opt_inst = container_of(opt_inst_info, struct team_option_inst, info);
385 opt_inst->changed = true;
386}
387EXPORT_SYMBOL(team_option_inst_set_change);
388
389void team_options_change_check(struct team *team)
390{
391 __team_options_change_check(team);
392}
393EXPORT_SYMBOL(team_options_change_check);
394
395
396/****************
397 * Mode handling
398 ****************/
399
400static LIST_HEAD(mode_list);
401static DEFINE_SPINLOCK(mode_list_lock);
402
403struct team_mode_item {
404 struct list_head list;
405 const struct team_mode *mode;
406};
407
408static struct team_mode_item *__find_mode(const char *kind)
409{
410 struct team_mode_item *mitem;
411
412 list_for_each_entry(mitem, &mode_list, list) {
413 if (strcmp(mitem->mode->kind, kind) == 0)
414 return mitem;
415 }
416 return NULL;
417}
418
419static bool is_good_mode_name(const char *name)
420{
421 while (*name != '\0') {
422 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
423 return false;
424 name++;
425 }
426 return true;
427}
428
429int team_mode_register(const struct team_mode *mode)
430{
431 int err = 0;
432 struct team_mode_item *mitem;
433
434 if (!is_good_mode_name(mode->kind) ||
435 mode->priv_size > TEAM_MODE_PRIV_SIZE)
436 return -EINVAL;
437
438 mitem = kmalloc(sizeof(*mitem), GFP_KERNEL);
439 if (!mitem)
440 return -ENOMEM;
441
442 spin_lock(&mode_list_lock);
443 if (__find_mode(mode->kind)) {
444 err = -EEXIST;
445 kfree(mitem);
446 goto unlock;
447 }
448 mitem->mode = mode;
449 list_add_tail(&mitem->list, &mode_list);
450unlock:
451 spin_unlock(&mode_list_lock);
452 return err;
453}
454EXPORT_SYMBOL(team_mode_register);
455
456void team_mode_unregister(const struct team_mode *mode)
457{
458 struct team_mode_item *mitem;
459
460 spin_lock(&mode_list_lock);
461 mitem = __find_mode(mode->kind);
462 if (mitem) {
463 list_del_init(&mitem->list);
464 kfree(mitem);
465 }
466 spin_unlock(&mode_list_lock);
467}
468EXPORT_SYMBOL(team_mode_unregister);
469
470static const struct team_mode *team_mode_get(const char *kind)
471{
472 struct team_mode_item *mitem;
473 const struct team_mode *mode = NULL;
474
475 spin_lock(&mode_list_lock);
476 mitem = __find_mode(kind);
477 if (!mitem) {
478 spin_unlock(&mode_list_lock);
479 request_module("team-mode-%s", kind);
480 spin_lock(&mode_list_lock);
481 mitem = __find_mode(kind);
482 }
483 if (mitem) {
484 mode = mitem->mode;
485 if (!try_module_get(mode->owner))
486 mode = NULL;
487 }
488
489 spin_unlock(&mode_list_lock);
490 return mode;
491}
492
493static void team_mode_put(const struct team_mode *mode)
494{
495 module_put(mode->owner);
496}
497
498static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
499{
500 dev_kfree_skb_any(skb);
501 return false;
502}
503
504static rx_handler_result_t team_dummy_receive(struct team *team,
505 struct team_port *port,
506 struct sk_buff *skb)
507{
508 return RX_HANDLER_ANOTHER;
509}
510
511static const struct team_mode __team_no_mode = {
512 .kind = "*NOMODE*",
513};
514
515static bool team_is_mode_set(struct team *team)
516{
517 return team->mode != &__team_no_mode;
518}
519
520static void team_set_no_mode(struct team *team)
521{
522 team->user_carrier_enabled = false;
523 team->mode = &__team_no_mode;
524}
525
526static void __team_adjust_ops(struct team *team, int en_port_count)
527{
528 /*
529 * To avoid checks in rx/tx skb paths, ensure here that non-null and
530 * correct ops are always set.
531 */
532
533 if (!en_port_count || !team_is_mode_set(team) ||
534 !team->mode->ops->transmit)
535 team->ops.transmit = team_dummy_transmit;
536 else
537 team->ops.transmit = team->mode->ops->transmit;
538
539 if (!en_port_count || !team_is_mode_set(team) ||
540 !team->mode->ops->receive)
541 team->ops.receive = team_dummy_receive;
542 else
543 team->ops.receive = team->mode->ops->receive;
544}
545
546static void team_adjust_ops(struct team *team)
547{
548 __team_adjust_ops(team, team->en_port_count);
549}
550
551/*
552 * We can benefit from the fact that it's ensured no port is present
553 * at the time of mode change. Therefore no packets are in fly so there's no
554 * need to set mode operations in any special way.
555 */
556static int __team_change_mode(struct team *team,
557 const struct team_mode *new_mode)
558{
559 /* Check if mode was previously set and do cleanup if so */
560 if (team_is_mode_set(team)) {
561 void (*exit_op)(struct team *team) = team->ops.exit;
562
563 /* Clear ops area so no callback is called any longer */
564 memset(&team->ops, 0, sizeof(struct team_mode_ops));
565 team_adjust_ops(team);
566
567 if (exit_op)
568 exit_op(team);
569 team_mode_put(team->mode);
570 team_set_no_mode(team);
571 /* zero private data area */
572 memset(&team->mode_priv, 0,
573 sizeof(struct team) - offsetof(struct team, mode_priv));
574 }
575
576 if (!new_mode)
577 return 0;
578
579 if (new_mode->ops->init) {
580 int err;
581
582 err = new_mode->ops->init(team);
583 if (err)
584 return err;
585 }
586
587 team->mode = new_mode;
588 memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
589 team_adjust_ops(team);
590
591 return 0;
592}
593
594static int team_change_mode(struct team *team, const char *kind)
595{
596 const struct team_mode *new_mode;
597 struct net_device *dev = team->dev;
598 int err;
599
600 if (!list_empty(&team->port_list)) {
601 netdev_err(dev, "No ports can be present during mode change\n");
602 return -EBUSY;
603 }
604
605 if (team_is_mode_set(team) && strcmp(team->mode->kind, kind) == 0) {
606 netdev_err(dev, "Unable to change to the same mode the team is in\n");
607 return -EINVAL;
608 }
609
610 new_mode = team_mode_get(kind);
611 if (!new_mode) {
612 netdev_err(dev, "Mode \"%s\" not found\n", kind);
613 return -EINVAL;
614 }
615
616 err = __team_change_mode(team, new_mode);
617 if (err) {
618 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
619 team_mode_put(new_mode);
620 return err;
621 }
622
623 netdev_info(dev, "Mode changed to \"%s\"\n", kind);
624 return 0;
625}
626
627
628/************************
629 * Rx path frame handler
630 ************************/
631
632/* note: already called with rcu_read_lock */
633static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
634{
635 struct sk_buff *skb = *pskb;
636 struct team_port *port;
637 struct team *team;
638 rx_handler_result_t res;
639
640 skb = skb_share_check(skb, GFP_ATOMIC);
641 if (!skb)
642 return RX_HANDLER_CONSUMED;
643
644 *pskb = skb;
645
646 port = team_port_get_rcu(skb->dev);
647 team = port->team;
648 if (!team_port_enabled(port)) {
649 /* allow exact match delivery for disabled ports */
650 res = RX_HANDLER_EXACT;
651 } else {
652 res = team->ops.receive(team, port, skb);
653 }
654 if (res == RX_HANDLER_ANOTHER) {
655 struct team_pcpu_stats *pcpu_stats;
656
657 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
658 u64_stats_update_begin(&pcpu_stats->syncp);
659 pcpu_stats->rx_packets++;
660 pcpu_stats->rx_bytes += skb->len;
661 if (skb->pkt_type == PACKET_MULTICAST)
662 pcpu_stats->rx_multicast++;
663 u64_stats_update_end(&pcpu_stats->syncp);
664
665 skb->dev = team->dev;
666 } else {
667 this_cpu_inc(team->pcpu_stats->rx_dropped);
668 }
669
670 return res;
671}
672
673
674/*************************************
675 * Multiqueue Tx port select override
676 *************************************/
677
678static int team_queue_override_init(struct team *team)
679{
680 struct list_head *listarr;
681 unsigned int queue_cnt = team->dev->num_tx_queues - 1;
682 unsigned int i;
683
684 if (!queue_cnt)
685 return 0;
686 listarr = kmalloc(sizeof(struct list_head) * queue_cnt, GFP_KERNEL);
687 if (!listarr)
688 return -ENOMEM;
689 team->qom_lists = listarr;
690 for (i = 0; i < queue_cnt; i++)
691 INIT_LIST_HEAD(listarr++);
692 return 0;
693}
694
695static void team_queue_override_fini(struct team *team)
696{
697 kfree(team->qom_lists);
698}
699
700static struct list_head *__team_get_qom_list(struct team *team, u16 queue_id)
701{
702 return &team->qom_lists[queue_id - 1];
703}
704
705/*
706 * note: already called with rcu_read_lock
707 */
708static bool team_queue_override_transmit(struct team *team, struct sk_buff *skb)
709{
710 struct list_head *qom_list;
711 struct team_port *port;
712
713 if (!team->queue_override_enabled || !skb->queue_mapping)
714 return false;
715 qom_list = __team_get_qom_list(team, skb->queue_mapping);
716 list_for_each_entry_rcu(port, qom_list, qom_list) {
717 if (!team_dev_queue_xmit(team, port, skb))
718 return true;
719 }
720 return false;
721}
722
723static void __team_queue_override_port_del(struct team *team,
724 struct team_port *port)
725{
726 list_del_rcu(&port->qom_list);
727 synchronize_rcu();
728 INIT_LIST_HEAD(&port->qom_list);
729}
730
731static bool team_queue_override_port_has_gt_prio_than(struct team_port *port,
732 struct team_port *cur)
733{
734 if (port->priority < cur->priority)
735 return true;
736 if (port->priority > cur->priority)
737 return false;
738 if (port->index < cur->index)
739 return true;
740 return false;
741}
742
743static void __team_queue_override_port_add(struct team *team,
744 struct team_port *port)
745{
746 struct team_port *cur;
747 struct list_head *qom_list;
748 struct list_head *node;
749
750 if (!port->queue_id || !team_port_enabled(port))
751 return;
752
753 qom_list = __team_get_qom_list(team, port->queue_id);
754 node = qom_list;
755 list_for_each_entry(cur, qom_list, qom_list) {
756 if (team_queue_override_port_has_gt_prio_than(port, cur))
757 break;
758 node = &cur->qom_list;
759 }
760 list_add_tail_rcu(&port->qom_list, node);
761}
762
763static void __team_queue_override_enabled_check(struct team *team)
764{
765 struct team_port *port;
766 bool enabled = false;
767
768 list_for_each_entry(port, &team->port_list, list) {
769 if (!list_empty(&port->qom_list)) {
770 enabled = true;
771 break;
772 }
773 }
774 if (enabled == team->queue_override_enabled)
775 return;
776 netdev_dbg(team->dev, "%s queue override\n",
777 enabled ? "Enabling" : "Disabling");
778 team->queue_override_enabled = enabled;
779}
780
781static void team_queue_override_port_refresh(struct team *team,
782 struct team_port *port)
783{
784 __team_queue_override_port_del(team, port);
785 __team_queue_override_port_add(team, port);
786 __team_queue_override_enabled_check(team);
787}
788
789
790/****************
791 * Port handling
792 ****************/
793
794static bool team_port_find(const struct team *team,
795 const struct team_port *port)
796{
797 struct team_port *cur;
798
799 list_for_each_entry(cur, &team->port_list, list)
800 if (cur == port)
801 return true;
802 return false;
803}
804
805/*
806 * Enable/disable port by adding to enabled port hashlist and setting
807 * port->index (Might be racy so reader could see incorrect ifindex when
808 * processing a flying packet, but that is not a problem). Write guarded
809 * by team->lock.
810 */
811static void team_port_enable(struct team *team,
812 struct team_port *port)
813{
814 if (team_port_enabled(port))
815 return;
816 port->index = team->en_port_count++;
817 hlist_add_head_rcu(&port->hlist,
818 team_port_index_hash(team, port->index));
819 team_adjust_ops(team);
820 team_queue_override_port_refresh(team, port);
821 if (team->ops.port_enabled)
822 team->ops.port_enabled(team, port);
823}
824
825static void __reconstruct_port_hlist(struct team *team, int rm_index)
826{
827 int i;
828 struct team_port *port;
829
830 for (i = rm_index + 1; i < team->en_port_count; i++) {
831 port = team_get_port_by_index(team, i);
832 hlist_del_rcu(&port->hlist);
833 port->index--;
834 hlist_add_head_rcu(&port->hlist,
835 team_port_index_hash(team, port->index));
836 }
837}
838
839static void team_port_disable(struct team *team,
840 struct team_port *port)
841{
842 if (!team_port_enabled(port))
843 return;
844 if (team->ops.port_disabled)
845 team->ops.port_disabled(team, port);
846 hlist_del_rcu(&port->hlist);
847 __reconstruct_port_hlist(team, port->index);
848 port->index = -1;
849 team_queue_override_port_refresh(team, port);
850 __team_adjust_ops(team, team->en_port_count - 1);
851 /*
852 * Wait until readers see adjusted ops. This ensures that
853 * readers never see team->en_port_count == 0
854 */
855 synchronize_rcu();
856 team->en_port_count--;
857}
858
859#define TEAM_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \
860 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
861 NETIF_F_HIGHDMA | NETIF_F_LRO)
862
863static void __team_compute_features(struct team *team)
864{
865 struct team_port *port;
866 u32 vlan_features = TEAM_VLAN_FEATURES;
867 unsigned short max_hard_header_len = ETH_HLEN;
868 unsigned int flags, dst_release_flag = IFF_XMIT_DST_RELEASE;
869
870 list_for_each_entry(port, &team->port_list, list) {
871 vlan_features = netdev_increment_features(vlan_features,
872 port->dev->vlan_features,
873 TEAM_VLAN_FEATURES);
874
875 dst_release_flag &= port->dev->priv_flags;
876 if (port->dev->hard_header_len > max_hard_header_len)
877 max_hard_header_len = port->dev->hard_header_len;
878 }
879
880 team->dev->vlan_features = vlan_features;
881 team->dev->hard_header_len = max_hard_header_len;
882
883 flags = team->dev->priv_flags & ~IFF_XMIT_DST_RELEASE;
884 team->dev->priv_flags = flags | dst_release_flag;
885
886 netdev_change_features(team->dev);
887}
888
889static void team_compute_features(struct team *team)
890{
891 mutex_lock(&team->lock);
892 __team_compute_features(team);
893 mutex_unlock(&team->lock);
894}
895
896static int team_port_enter(struct team *team, struct team_port *port)
897{
898 int err = 0;
899
900 dev_hold(team->dev);
901 port->dev->priv_flags |= IFF_TEAM_PORT;
902 if (team->ops.port_enter) {
903 err = team->ops.port_enter(team, port);
904 if (err) {
905 netdev_err(team->dev, "Device %s failed to enter team mode\n",
906 port->dev->name);
907 goto err_port_enter;
908 }
909 }
910
911 return 0;
912
913err_port_enter:
914 port->dev->priv_flags &= ~IFF_TEAM_PORT;
915 dev_put(team->dev);
916
917 return err;
918}
919
920static void team_port_leave(struct team *team, struct team_port *port)
921{
922 if (team->ops.port_leave)
923 team->ops.port_leave(team, port);
924 port->dev->priv_flags &= ~IFF_TEAM_PORT;
925 dev_put(team->dev);
926}
927
928#ifdef CONFIG_NET_POLL_CONTROLLER
929static int team_port_enable_netpoll(struct team *team, struct team_port *port,
930 gfp_t gfp)
931{
932 struct netpoll *np;
933 int err;
934
935 np = kzalloc(sizeof(*np), gfp);
936 if (!np)
937 return -ENOMEM;
938
939 err = __netpoll_setup(np, port->dev, gfp);
940 if (err) {
941 kfree(np);
942 return err;
943 }
944 port->np = np;
945 return err;
946}
947
948static void team_port_disable_netpoll(struct team_port *port)
949{
950 struct netpoll *np = port->np;
951
952 if (!np)
953 return;
954 port->np = NULL;
955
956 /* Wait for transmitting packets to finish before freeing. */
957 synchronize_rcu_bh();
958 __netpoll_cleanup(np);
959 kfree(np);
960}
961
962static struct netpoll_info *team_netpoll_info(struct team *team)
963{
964 return team->dev->npinfo;
965}
966
967#else
968static int team_port_enable_netpoll(struct team *team, struct team_port *port,
969 gfp_t gfp)
970{
971 return 0;
972}
973static void team_port_disable_netpoll(struct team_port *port)
974{
975}
976static struct netpoll_info *team_netpoll_info(struct team *team)
977{
978 return NULL;
979}
980#endif
981
982static void __team_port_change_port_added(struct team_port *port, bool linkup);
983static int team_dev_type_check_change(struct net_device *dev,
984 struct net_device *port_dev);
985
986static int team_port_add(struct team *team, struct net_device *port_dev)
987{
988 struct net_device *dev = team->dev;
989 struct team_port *port;
990 char *portname = port_dev->name;
991 int err;
992
993 if (port_dev->flags & IFF_LOOPBACK) {
994 netdev_err(dev, "Device %s is loopback device. Loopback devices can't be added as a team port\n",
995 portname);
996 return -EINVAL;
997 }
998
999 if (team_port_exists(port_dev)) {
1000 netdev_err(dev, "Device %s is already a port "
1001 "of a team device\n", portname);
1002 return -EBUSY;
1003 }
1004
1005 if (port_dev->features & NETIF_F_VLAN_CHALLENGED &&
1006 vlan_uses_dev(dev)) {
1007 netdev_err(dev, "Device %s is VLAN challenged and team device has VLAN set up\n",
1008 portname);
1009 return -EPERM;
1010 }
1011
1012 err = team_dev_type_check_change(dev, port_dev);
1013 if (err)
1014 return err;
1015
1016 if (port_dev->flags & IFF_UP) {
1017 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
1018 portname);
1019 return -EBUSY;
1020 }
1021
1022 port = kzalloc(sizeof(struct team_port) + team->mode->port_priv_size,
1023 GFP_KERNEL);
1024 if (!port)
1025 return -ENOMEM;
1026
1027 port->dev = port_dev;
1028 port->team = team;
1029 INIT_LIST_HEAD(&port->qom_list);
1030
1031 port->orig.mtu = port_dev->mtu;
1032 err = dev_set_mtu(port_dev, dev->mtu);
1033 if (err) {
1034 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
1035 goto err_set_mtu;
1036 }
1037
1038 memcpy(port->orig.dev_addr, port_dev->dev_addr, port_dev->addr_len);
1039
1040 err = team_port_enter(team, port);
1041 if (err) {
1042 netdev_err(dev, "Device %s failed to enter team mode\n",
1043 portname);
1044 goto err_port_enter;
1045 }
1046
1047 err = dev_open(port_dev);
1048 if (err) {
1049 netdev_dbg(dev, "Device %s opening failed\n",
1050 portname);
1051 goto err_dev_open;
1052 }
1053
1054 err = vlan_vids_add_by_dev(port_dev, dev);
1055 if (err) {
1056 netdev_err(dev, "Failed to add vlan ids to device %s\n",
1057 portname);
1058 goto err_vids_add;
1059 }
1060
1061 if (team_netpoll_info(team)) {
1062 err = team_port_enable_netpoll(team, port, GFP_KERNEL);
1063 if (err) {
1064 netdev_err(dev, "Failed to enable netpoll on device %s\n",
1065 portname);
1066 goto err_enable_netpoll;
1067 }
1068 }
1069
1070 err = netdev_master_upper_dev_link(port_dev, dev);
1071 if (err) {
1072 netdev_err(dev, "Device %s failed to set upper link\n",
1073 portname);
1074 goto err_set_upper_link;
1075 }
1076
1077 err = netdev_rx_handler_register(port_dev, team_handle_frame,
1078 port);
1079 if (err) {
1080 netdev_err(dev, "Device %s failed to register rx_handler\n",
1081 portname);
1082 goto err_handler_register;
1083 }
1084
1085 err = __team_option_inst_add_port(team, port);
1086 if (err) {
1087 netdev_err(dev, "Device %s failed to add per-port options\n",
1088 portname);
1089 goto err_option_port_add;
1090 }
1091
1092 port->index = -1;
1093 list_add_tail_rcu(&port->list, &team->port_list);
1094 team_port_enable(team, port);
1095 __team_compute_features(team);
1096 __team_port_change_port_added(port, !!netif_carrier_ok(port_dev));
1097 __team_options_change_check(team);
1098
1099 netdev_info(dev, "Port device %s added\n", portname);
1100
1101 return 0;
1102
1103err_option_port_add:
1104 netdev_rx_handler_unregister(port_dev);
1105
1106err_handler_register:
1107 netdev_upper_dev_unlink(port_dev, dev);
1108
1109err_set_upper_link:
1110 team_port_disable_netpoll(port);
1111
1112err_enable_netpoll:
1113 vlan_vids_del_by_dev(port_dev, dev);
1114
1115err_vids_add:
1116 dev_close(port_dev);
1117
1118err_dev_open:
1119 team_port_leave(team, port);
1120 team_port_set_orig_dev_addr(port);
1121
1122err_port_enter:
1123 dev_set_mtu(port_dev, port->orig.mtu);
1124
1125err_set_mtu:
1126 kfree(port);
1127
1128 return err;
1129}
1130
1131static void __team_port_change_port_removed(struct team_port *port);
1132
1133static int team_port_del(struct team *team, struct net_device *port_dev)
1134{
1135 struct net_device *dev = team->dev;
1136 struct team_port *port;
1137 char *portname = port_dev->name;
1138
1139 port = team_port_get_rtnl(port_dev);
1140 if (!port || !team_port_find(team, port)) {
1141 netdev_err(dev, "Device %s does not act as a port of this team\n",
1142 portname);
1143 return -ENOENT;
1144 }
1145
1146 team_port_disable(team, port);
1147 list_del_rcu(&port->list);
1148 netdev_rx_handler_unregister(port_dev);
1149 netdev_upper_dev_unlink(port_dev, dev);
1150 team_port_disable_netpoll(port);
1151 vlan_vids_del_by_dev(port_dev, dev);
1152 dev_uc_unsync(port_dev, dev);
1153 dev_mc_unsync(port_dev, dev);
1154 dev_close(port_dev);
1155 team_port_leave(team, port);
1156
1157 __team_option_inst_mark_removed_port(team, port);
1158 __team_options_change_check(team);
1159 __team_option_inst_del_port(team, port);
1160 __team_port_change_port_removed(port);
1161
1162 team_port_set_orig_dev_addr(port);
1163 dev_set_mtu(port_dev, port->orig.mtu);
1164 synchronize_rcu();
1165 kfree(port);
1166 netdev_info(dev, "Port device %s removed\n", portname);
1167 __team_compute_features(team);
1168
1169 return 0;
1170}
1171
1172
1173/*****************
1174 * Net device ops
1175 *****************/
1176
1177static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
1178{
1179 ctx->data.str_val = team->mode->kind;
1180 return 0;
1181}
1182
1183static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
1184{
1185 return team_change_mode(team, ctx->data.str_val);
1186}
1187
1188static int team_port_en_option_get(struct team *team,
1189 struct team_gsetter_ctx *ctx)
1190{
1191 struct team_port *port = ctx->info->port;
1192
1193 ctx->data.bool_val = team_port_enabled(port);
1194 return 0;
1195}
1196
1197static int team_port_en_option_set(struct team *team,
1198 struct team_gsetter_ctx *ctx)
1199{
1200 struct team_port *port = ctx->info->port;
1201
1202 if (ctx->data.bool_val)
1203 team_port_enable(team, port);
1204 else
1205 team_port_disable(team, port);
1206 return 0;
1207}
1208
1209static int team_user_linkup_option_get(struct team *team,
1210 struct team_gsetter_ctx *ctx)
1211{
1212 struct team_port *port = ctx->info->port;
1213
1214 ctx->data.bool_val = port->user.linkup;
1215 return 0;
1216}
1217
1218static void __team_carrier_check(struct team *team);
1219
1220static 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 __team_carrier_check(port->team);
1228 return 0;
1229}
1230
1231static int team_user_linkup_en_option_get(struct team *team,
1232 struct team_gsetter_ctx *ctx)
1233{
1234 struct team_port *port = ctx->info->port;
1235
1236 ctx->data.bool_val = port->user.linkup_enabled;
1237 return 0;
1238}
1239
1240static int team_user_linkup_en_option_set(struct team *team,
1241 struct team_gsetter_ctx *ctx)
1242{
1243 struct team_port *port = ctx->info->port;
1244
1245 port->user.linkup_enabled = ctx->data.bool_val;
1246 team_refresh_port_linkup(port);
1247 __team_carrier_check(port->team);
1248 return 0;
1249}
1250
1251static int team_priority_option_get(struct team *team,
1252 struct team_gsetter_ctx *ctx)
1253{
1254 struct team_port *port = ctx->info->port;
1255
1256 ctx->data.s32_val = port->priority;
1257 return 0;
1258}
1259
1260static int team_priority_option_set(struct team *team,
1261 struct team_gsetter_ctx *ctx)
1262{
1263 struct team_port *port = ctx->info->port;
1264
1265 port->priority = ctx->data.s32_val;
1266 team_queue_override_port_refresh(team, port);
1267 return 0;
1268}
1269
1270static int team_queue_id_option_get(struct team *team,
1271 struct team_gsetter_ctx *ctx)
1272{
1273 struct team_port *port = ctx->info->port;
1274
1275 ctx->data.u32_val = port->queue_id;
1276 return 0;
1277}
1278
1279static int team_queue_id_option_set(struct team *team,
1280 struct team_gsetter_ctx *ctx)
1281{
1282 struct team_port *port = ctx->info->port;
1283
1284 if (port->queue_id == ctx->data.u32_val)
1285 return 0;
1286 if (ctx->data.u32_val >= team->dev->real_num_tx_queues)
1287 return -EINVAL;
1288 port->queue_id = ctx->data.u32_val;
1289 team_queue_override_port_refresh(team, port);
1290 return 0;
1291}
1292
1293
1294static const struct team_option team_options[] = {
1295 {
1296 .name = "mode",
1297 .type = TEAM_OPTION_TYPE_STRING,
1298 .getter = team_mode_option_get,
1299 .setter = team_mode_option_set,
1300 },
1301 {
1302 .name = "enabled",
1303 .type = TEAM_OPTION_TYPE_BOOL,
1304 .per_port = true,
1305 .getter = team_port_en_option_get,
1306 .setter = team_port_en_option_set,
1307 },
1308 {
1309 .name = "user_linkup",
1310 .type = TEAM_OPTION_TYPE_BOOL,
1311 .per_port = true,
1312 .getter = team_user_linkup_option_get,
1313 .setter = team_user_linkup_option_set,
1314 },
1315 {
1316 .name = "user_linkup_enabled",
1317 .type = TEAM_OPTION_TYPE_BOOL,
1318 .per_port = true,
1319 .getter = team_user_linkup_en_option_get,
1320 .setter = team_user_linkup_en_option_set,
1321 },
1322 {
1323 .name = "priority",
1324 .type = TEAM_OPTION_TYPE_S32,
1325 .per_port = true,
1326 .getter = team_priority_option_get,
1327 .setter = team_priority_option_set,
1328 },
1329 {
1330 .name = "queue_id",
1331 .type = TEAM_OPTION_TYPE_U32,
1332 .per_port = true,
1333 .getter = team_queue_id_option_get,
1334 .setter = team_queue_id_option_set,
1335 },
1336};
1337
1338static struct lock_class_key team_netdev_xmit_lock_key;
1339static struct lock_class_key team_netdev_addr_lock_key;
1340static struct lock_class_key team_tx_busylock_key;
1341
1342static void team_set_lockdep_class_one(struct net_device *dev,
1343 struct netdev_queue *txq,
1344 void *unused)
1345{
1346 lockdep_set_class(&txq->_xmit_lock, &team_netdev_xmit_lock_key);
1347}
1348
1349static void team_set_lockdep_class(struct net_device *dev)
1350{
1351 lockdep_set_class(&dev->addr_list_lock, &team_netdev_addr_lock_key);
1352 netdev_for_each_tx_queue(dev, team_set_lockdep_class_one, NULL);
1353 dev->qdisc_tx_busylock = &team_tx_busylock_key;
1354}
1355
1356static int team_init(struct net_device *dev)
1357{
1358 struct team *team = netdev_priv(dev);
1359 int i;
1360 int err;
1361
1362 team->dev = dev;
1363 mutex_init(&team->lock);
1364 team_set_no_mode(team);
1365
1366 team->pcpu_stats = alloc_percpu(struct team_pcpu_stats);
1367 if (!team->pcpu_stats)
1368 return -ENOMEM;
1369
1370 for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1371 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1372 INIT_LIST_HEAD(&team->port_list);
1373 err = team_queue_override_init(team);
1374 if (err)
1375 goto err_team_queue_override_init;
1376
1377 team_adjust_ops(team);
1378
1379 INIT_LIST_HEAD(&team->option_list);
1380 INIT_LIST_HEAD(&team->option_inst_list);
1381 err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1382 if (err)
1383 goto err_options_register;
1384 netif_carrier_off(dev);
1385
1386 team_set_lockdep_class(dev);
1387
1388 return 0;
1389
1390err_options_register:
1391 team_queue_override_fini(team);
1392err_team_queue_override_init:
1393 free_percpu(team->pcpu_stats);
1394
1395 return err;
1396}
1397
1398static void team_uninit(struct net_device *dev)
1399{
1400 struct team *team = netdev_priv(dev);
1401 struct team_port *port;
1402 struct team_port *tmp;
1403
1404 mutex_lock(&team->lock);
1405 list_for_each_entry_safe(port, tmp, &team->port_list, list)
1406 team_port_del(team, port->dev);
1407
1408 __team_change_mode(team, NULL); /* cleanup */
1409 __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1410 team_queue_override_fini(team);
1411 mutex_unlock(&team->lock);
1412}
1413
1414static void team_destructor(struct net_device *dev)
1415{
1416 struct team *team = netdev_priv(dev);
1417
1418 free_percpu(team->pcpu_stats);
1419 free_netdev(dev);
1420}
1421
1422static int team_open(struct net_device *dev)
1423{
1424 return 0;
1425}
1426
1427static int team_close(struct net_device *dev)
1428{
1429 return 0;
1430}
1431
1432/*
1433 * note: already called with rcu_read_lock
1434 */
1435static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1436{
1437 struct team *team = netdev_priv(dev);
1438 bool tx_success;
1439 unsigned int len = skb->len;
1440
1441 tx_success = team_queue_override_transmit(team, skb);
1442 if (!tx_success)
1443 tx_success = team->ops.transmit(team, skb);
1444 if (tx_success) {
1445 struct team_pcpu_stats *pcpu_stats;
1446
1447 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1448 u64_stats_update_begin(&pcpu_stats->syncp);
1449 pcpu_stats->tx_packets++;
1450 pcpu_stats->tx_bytes += len;
1451 u64_stats_update_end(&pcpu_stats->syncp);
1452 } else {
1453 this_cpu_inc(team->pcpu_stats->tx_dropped);
1454 }
1455
1456 return NETDEV_TX_OK;
1457}
1458
1459static u16 team_select_queue(struct net_device *dev, struct sk_buff *skb)
1460{
1461 /*
1462 * This helper function exists to help dev_pick_tx get the correct
1463 * destination queue. Using a helper function skips a call to
1464 * skb_tx_hash and will put the skbs in the queue we expect on their
1465 * way down to the team driver.
1466 */
1467 u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
1468
1469 /*
1470 * Save the original txq to restore before passing to the driver
1471 */
1472 qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
1473
1474 if (unlikely(txq >= dev->real_num_tx_queues)) {
1475 do {
1476 txq -= dev->real_num_tx_queues;
1477 } while (txq >= dev->real_num_tx_queues);
1478 }
1479 return txq;
1480}
1481
1482static void team_change_rx_flags(struct net_device *dev, int change)
1483{
1484 struct team *team = netdev_priv(dev);
1485 struct team_port *port;
1486 int inc;
1487
1488 rcu_read_lock();
1489 list_for_each_entry_rcu(port, &team->port_list, list) {
1490 if (change & IFF_PROMISC) {
1491 inc = dev->flags & IFF_PROMISC ? 1 : -1;
1492 dev_set_promiscuity(port->dev, inc);
1493 }
1494 if (change & IFF_ALLMULTI) {
1495 inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1496 dev_set_allmulti(port->dev, inc);
1497 }
1498 }
1499 rcu_read_unlock();
1500}
1501
1502static void team_set_rx_mode(struct net_device *dev)
1503{
1504 struct team *team = netdev_priv(dev);
1505 struct team_port *port;
1506
1507 rcu_read_lock();
1508 list_for_each_entry_rcu(port, &team->port_list, list) {
1509 dev_uc_sync_multiple(port->dev, dev);
1510 dev_mc_sync_multiple(port->dev, dev);
1511 }
1512 rcu_read_unlock();
1513}
1514
1515static int team_set_mac_address(struct net_device *dev, void *p)
1516{
1517 struct sockaddr *addr = p;
1518 struct team *team = netdev_priv(dev);
1519 struct team_port *port;
1520
1521 if (dev->type == ARPHRD_ETHER && !is_valid_ether_addr(addr->sa_data))
1522 return -EADDRNOTAVAIL;
1523 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1524 mutex_lock(&team->lock);
1525 list_for_each_entry(port, &team->port_list, list)
1526 if (team->ops.port_change_dev_addr)
1527 team->ops.port_change_dev_addr(team, port);
1528 mutex_unlock(&team->lock);
1529 return 0;
1530}
1531
1532static int team_change_mtu(struct net_device *dev, int new_mtu)
1533{
1534 struct team *team = netdev_priv(dev);
1535 struct team_port *port;
1536 int err;
1537
1538 /*
1539 * Alhough this is reader, it's guarded by team lock. It's not possible
1540 * to traverse list in reverse under rcu_read_lock
1541 */
1542 mutex_lock(&team->lock);
1543 team->port_mtu_change_allowed = true;
1544 list_for_each_entry(port, &team->port_list, list) {
1545 err = dev_set_mtu(port->dev, new_mtu);
1546 if (err) {
1547 netdev_err(dev, "Device %s failed to change mtu",
1548 port->dev->name);
1549 goto unwind;
1550 }
1551 }
1552 team->port_mtu_change_allowed = false;
1553 mutex_unlock(&team->lock);
1554
1555 dev->mtu = new_mtu;
1556
1557 return 0;
1558
1559unwind:
1560 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1561 dev_set_mtu(port->dev, dev->mtu);
1562 team->port_mtu_change_allowed = false;
1563 mutex_unlock(&team->lock);
1564
1565 return err;
1566}
1567
1568static struct rtnl_link_stats64 *
1569team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1570{
1571 struct team *team = netdev_priv(dev);
1572 struct team_pcpu_stats *p;
1573 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1574 u32 rx_dropped = 0, tx_dropped = 0;
1575 unsigned int start;
1576 int i;
1577
1578 for_each_possible_cpu(i) {
1579 p = per_cpu_ptr(team->pcpu_stats, i);
1580 do {
1581 start = u64_stats_fetch_begin_bh(&p->syncp);
1582 rx_packets = p->rx_packets;
1583 rx_bytes = p->rx_bytes;
1584 rx_multicast = p->rx_multicast;
1585 tx_packets = p->tx_packets;
1586 tx_bytes = p->tx_bytes;
1587 } while (u64_stats_fetch_retry_bh(&p->syncp, start));
1588
1589 stats->rx_packets += rx_packets;
1590 stats->rx_bytes += rx_bytes;
1591 stats->multicast += rx_multicast;
1592 stats->tx_packets += tx_packets;
1593 stats->tx_bytes += tx_bytes;
1594 /*
1595 * rx_dropped & tx_dropped are u32, updated
1596 * without syncp protection.
1597 */
1598 rx_dropped += p->rx_dropped;
1599 tx_dropped += p->tx_dropped;
1600 }
1601 stats->rx_dropped = rx_dropped;
1602 stats->tx_dropped = tx_dropped;
1603 return stats;
1604}
1605
1606static int team_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
1607{
1608 struct team *team = netdev_priv(dev);
1609 struct team_port *port;
1610 int err;
1611
1612 /*
1613 * Alhough this is reader, it's guarded by team lock. It's not possible
1614 * to traverse list in reverse under rcu_read_lock
1615 */
1616 mutex_lock(&team->lock);
1617 list_for_each_entry(port, &team->port_list, list) {
1618 err = vlan_vid_add(port->dev, proto, vid);
1619 if (err)
1620 goto unwind;
1621 }
1622 mutex_unlock(&team->lock);
1623
1624 return 0;
1625
1626unwind:
1627 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1628 vlan_vid_del(port->dev, proto, vid);
1629 mutex_unlock(&team->lock);
1630
1631 return err;
1632}
1633
1634static int team_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
1635{
1636 struct team *team = netdev_priv(dev);
1637 struct team_port *port;
1638
1639 mutex_lock(&team->lock);
1640 list_for_each_entry(port, &team->port_list, list)
1641 vlan_vid_del(port->dev, proto, vid);
1642 mutex_unlock(&team->lock);
1643
1644 return 0;
1645}
1646
1647#ifdef CONFIG_NET_POLL_CONTROLLER
1648static void team_poll_controller(struct net_device *dev)
1649{
1650}
1651
1652static void __team_netpoll_cleanup(struct team *team)
1653{
1654 struct team_port *port;
1655
1656 list_for_each_entry(port, &team->port_list, list)
1657 team_port_disable_netpoll(port);
1658}
1659
1660static void team_netpoll_cleanup(struct net_device *dev)
1661{
1662 struct team *team = netdev_priv(dev);
1663
1664 mutex_lock(&team->lock);
1665 __team_netpoll_cleanup(team);
1666 mutex_unlock(&team->lock);
1667}
1668
1669static int team_netpoll_setup(struct net_device *dev,
1670 struct netpoll_info *npifo, gfp_t gfp)
1671{
1672 struct team *team = netdev_priv(dev);
1673 struct team_port *port;
1674 int err = 0;
1675
1676 mutex_lock(&team->lock);
1677 list_for_each_entry(port, &team->port_list, list) {
1678 err = team_port_enable_netpoll(team, port, gfp);
1679 if (err) {
1680 __team_netpoll_cleanup(team);
1681 break;
1682 }
1683 }
1684 mutex_unlock(&team->lock);
1685 return err;
1686}
1687#endif
1688
1689static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
1690{
1691 struct team *team = netdev_priv(dev);
1692 int err;
1693
1694 mutex_lock(&team->lock);
1695 err = team_port_add(team, port_dev);
1696 mutex_unlock(&team->lock);
1697 return err;
1698}
1699
1700static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1701{
1702 struct team *team = netdev_priv(dev);
1703 int err;
1704
1705 mutex_lock(&team->lock);
1706 err = team_port_del(team, port_dev);
1707 mutex_unlock(&team->lock);
1708 return err;
1709}
1710
1711static netdev_features_t team_fix_features(struct net_device *dev,
1712 netdev_features_t features)
1713{
1714 struct team_port *port;
1715 struct team *team = netdev_priv(dev);
1716 netdev_features_t mask;
1717
1718 mask = features;
1719 features &= ~NETIF_F_ONE_FOR_ALL;
1720 features |= NETIF_F_ALL_FOR_ALL;
1721
1722 rcu_read_lock();
1723 list_for_each_entry_rcu(port, &team->port_list, list) {
1724 features = netdev_increment_features(features,
1725 port->dev->features,
1726 mask);
1727 }
1728 rcu_read_unlock();
1729 return features;
1730}
1731
1732static int team_change_carrier(struct net_device *dev, bool new_carrier)
1733{
1734 struct team *team = netdev_priv(dev);
1735
1736 team->user_carrier_enabled = true;
1737
1738 if (new_carrier)
1739 netif_carrier_on(dev);
1740 else
1741 netif_carrier_off(dev);
1742 return 0;
1743}
1744
1745static const struct net_device_ops team_netdev_ops = {
1746 .ndo_init = team_init,
1747 .ndo_uninit = team_uninit,
1748 .ndo_open = team_open,
1749 .ndo_stop = team_close,
1750 .ndo_start_xmit = team_xmit,
1751 .ndo_select_queue = team_select_queue,
1752 .ndo_change_rx_flags = team_change_rx_flags,
1753 .ndo_set_rx_mode = team_set_rx_mode,
1754 .ndo_set_mac_address = team_set_mac_address,
1755 .ndo_change_mtu = team_change_mtu,
1756 .ndo_get_stats64 = team_get_stats64,
1757 .ndo_vlan_rx_add_vid = team_vlan_rx_add_vid,
1758 .ndo_vlan_rx_kill_vid = team_vlan_rx_kill_vid,
1759#ifdef CONFIG_NET_POLL_CONTROLLER
1760 .ndo_poll_controller = team_poll_controller,
1761 .ndo_netpoll_setup = team_netpoll_setup,
1762 .ndo_netpoll_cleanup = team_netpoll_cleanup,
1763#endif
1764 .ndo_add_slave = team_add_slave,
1765 .ndo_del_slave = team_del_slave,
1766 .ndo_fix_features = team_fix_features,
1767 .ndo_change_carrier = team_change_carrier,
1768};
1769
1770/***********************
1771 * ethtool interface
1772 ***********************/
1773
1774static void team_ethtool_get_drvinfo(struct net_device *dev,
1775 struct ethtool_drvinfo *drvinfo)
1776{
1777 strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
1778 strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
1779}
1780
1781static const struct ethtool_ops team_ethtool_ops = {
1782 .get_drvinfo = team_ethtool_get_drvinfo,
1783 .get_link = ethtool_op_get_link,
1784};
1785
1786/***********************
1787 * rt netlink interface
1788 ***********************/
1789
1790static void team_setup_by_port(struct net_device *dev,
1791 struct net_device *port_dev)
1792{
1793 dev->header_ops = port_dev->header_ops;
1794 dev->type = port_dev->type;
1795 dev->hard_header_len = port_dev->hard_header_len;
1796 dev->addr_len = port_dev->addr_len;
1797 dev->mtu = port_dev->mtu;
1798 memcpy(dev->broadcast, port_dev->broadcast, port_dev->addr_len);
1799 memcpy(dev->dev_addr, port_dev->dev_addr, port_dev->addr_len);
1800}
1801
1802static int team_dev_type_check_change(struct net_device *dev,
1803 struct net_device *port_dev)
1804{
1805 struct team *team = netdev_priv(dev);
1806 char *portname = port_dev->name;
1807 int err;
1808
1809 if (dev->type == port_dev->type)
1810 return 0;
1811 if (!list_empty(&team->port_list)) {
1812 netdev_err(dev, "Device %s is of different type\n", portname);
1813 return -EBUSY;
1814 }
1815 err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
1816 err = notifier_to_errno(err);
1817 if (err) {
1818 netdev_err(dev, "Refused to change device type\n");
1819 return err;
1820 }
1821 dev_uc_flush(dev);
1822 dev_mc_flush(dev);
1823 team_setup_by_port(dev, port_dev);
1824 call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
1825 return 0;
1826}
1827
1828static void team_setup(struct net_device *dev)
1829{
1830 ether_setup(dev);
1831
1832 dev->netdev_ops = &team_netdev_ops;
1833 dev->ethtool_ops = &team_ethtool_ops;
1834 dev->destructor = team_destructor;
1835 dev->tx_queue_len = 0;
1836 dev->flags |= IFF_MULTICAST;
1837 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
1838
1839 /*
1840 * Indicate we support unicast address filtering. That way core won't
1841 * bring us to promisc mode in case a unicast addr is added.
1842 * Let this up to underlay drivers.
1843 */
1844 dev->priv_flags |= IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
1845
1846 dev->features |= NETIF_F_LLTX;
1847 dev->features |= NETIF_F_GRO;
1848 dev->hw_features = TEAM_VLAN_FEATURES |
1849 NETIF_F_HW_VLAN_CTAG_TX |
1850 NETIF_F_HW_VLAN_CTAG_RX |
1851 NETIF_F_HW_VLAN_CTAG_FILTER;
1852
1853 dev->hw_features &= ~(NETIF_F_ALL_CSUM & ~NETIF_F_HW_CSUM);
1854 dev->features |= dev->hw_features;
1855}
1856
1857static int team_newlink(struct net *src_net, struct net_device *dev,
1858 struct nlattr *tb[], struct nlattr *data[])
1859{
1860 int err;
1861
1862 if (tb[IFLA_ADDRESS] == NULL)
1863 eth_hw_addr_random(dev);
1864
1865 err = register_netdevice(dev);
1866 if (err)
1867 return err;
1868
1869 return 0;
1870}
1871
1872static int team_validate(struct nlattr *tb[], struct nlattr *data[])
1873{
1874 if (tb[IFLA_ADDRESS]) {
1875 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
1876 return -EINVAL;
1877 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
1878 return -EADDRNOTAVAIL;
1879 }
1880 return 0;
1881}
1882
1883static unsigned int team_get_num_tx_queues(void)
1884{
1885 return TEAM_DEFAULT_NUM_TX_QUEUES;
1886}
1887
1888static unsigned int team_get_num_rx_queues(void)
1889{
1890 return TEAM_DEFAULT_NUM_RX_QUEUES;
1891}
1892
1893static struct rtnl_link_ops team_link_ops __read_mostly = {
1894 .kind = DRV_NAME,
1895 .priv_size = sizeof(struct team),
1896 .setup = team_setup,
1897 .newlink = team_newlink,
1898 .validate = team_validate,
1899 .get_num_tx_queues = team_get_num_tx_queues,
1900 .get_num_rx_queues = team_get_num_rx_queues,
1901};
1902
1903
1904/***********************************
1905 * Generic netlink custom interface
1906 ***********************************/
1907
1908static struct genl_family team_nl_family = {
1909 .id = GENL_ID_GENERATE,
1910 .name = TEAM_GENL_NAME,
1911 .version = TEAM_GENL_VERSION,
1912 .maxattr = TEAM_ATTR_MAX,
1913 .netnsok = true,
1914};
1915
1916static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
1917 [TEAM_ATTR_UNSPEC] = { .type = NLA_UNSPEC, },
1918 [TEAM_ATTR_TEAM_IFINDEX] = { .type = NLA_U32 },
1919 [TEAM_ATTR_LIST_OPTION] = { .type = NLA_NESTED },
1920 [TEAM_ATTR_LIST_PORT] = { .type = NLA_NESTED },
1921};
1922
1923static const struct nla_policy
1924team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
1925 [TEAM_ATTR_OPTION_UNSPEC] = { .type = NLA_UNSPEC, },
1926 [TEAM_ATTR_OPTION_NAME] = {
1927 .type = NLA_STRING,
1928 .len = TEAM_STRING_MAX_LEN,
1929 },
1930 [TEAM_ATTR_OPTION_CHANGED] = { .type = NLA_FLAG },
1931 [TEAM_ATTR_OPTION_TYPE] = { .type = NLA_U8 },
1932 [TEAM_ATTR_OPTION_DATA] = { .type = NLA_BINARY },
1933};
1934
1935static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
1936{
1937 struct sk_buff *msg;
1938 void *hdr;
1939 int err;
1940
1941 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1942 if (!msg)
1943 return -ENOMEM;
1944
1945 hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
1946 &team_nl_family, 0, TEAM_CMD_NOOP);
1947 if (!hdr) {
1948 err = -EMSGSIZE;
1949 goto err_msg_put;
1950 }
1951
1952 genlmsg_end(msg, hdr);
1953
1954 return genlmsg_unicast(genl_info_net(info), msg, info->snd_portid);
1955
1956err_msg_put:
1957 nlmsg_free(msg);
1958
1959 return err;
1960}
1961
1962/*
1963 * Netlink cmd functions should be locked by following two functions.
1964 * Since dev gets held here, that ensures dev won't disappear in between.
1965 */
1966static struct team *team_nl_team_get(struct genl_info *info)
1967{
1968 struct net *net = genl_info_net(info);
1969 int ifindex;
1970 struct net_device *dev;
1971 struct team *team;
1972
1973 if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
1974 return NULL;
1975
1976 ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
1977 dev = dev_get_by_index(net, ifindex);
1978 if (!dev || dev->netdev_ops != &team_netdev_ops) {
1979 if (dev)
1980 dev_put(dev);
1981 return NULL;
1982 }
1983
1984 team = netdev_priv(dev);
1985 mutex_lock(&team->lock);
1986 return team;
1987}
1988
1989static void team_nl_team_put(struct team *team)
1990{
1991 mutex_unlock(&team->lock);
1992 dev_put(team->dev);
1993}
1994
1995typedef int team_nl_send_func_t(struct sk_buff *skb,
1996 struct team *team, u32 portid);
1997
1998static int team_nl_send_unicast(struct sk_buff *skb, struct team *team, u32 portid)
1999{
2000 return genlmsg_unicast(dev_net(team->dev), skb, portid);
2001}
2002
2003static int team_nl_fill_one_option_get(struct sk_buff *skb, struct team *team,
2004 struct team_option_inst *opt_inst)
2005{
2006 struct nlattr *option_item;
2007 struct team_option *option = opt_inst->option;
2008 struct team_option_inst_info *opt_inst_info = &opt_inst->info;
2009 struct team_gsetter_ctx ctx;
2010 int err;
2011
2012 ctx.info = opt_inst_info;
2013 err = team_option_get(team, opt_inst, &ctx);
2014 if (err)
2015 return err;
2016
2017 option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
2018 if (!option_item)
2019 return -EMSGSIZE;
2020
2021 if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
2022 goto nest_cancel;
2023 if (opt_inst_info->port &&
2024 nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
2025 opt_inst_info->port->dev->ifindex))
2026 goto nest_cancel;
2027 if (opt_inst->option->array_size &&
2028 nla_put_u32(skb, TEAM_ATTR_OPTION_ARRAY_INDEX,
2029 opt_inst_info->array_index))
2030 goto nest_cancel;
2031
2032 switch (option->type) {
2033 case TEAM_OPTION_TYPE_U32:
2034 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
2035 goto nest_cancel;
2036 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.u32_val))
2037 goto nest_cancel;
2038 break;
2039 case TEAM_OPTION_TYPE_STRING:
2040 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
2041 goto nest_cancel;
2042 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
2043 ctx.data.str_val))
2044 goto nest_cancel;
2045 break;
2046 case TEAM_OPTION_TYPE_BINARY:
2047 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
2048 goto nest_cancel;
2049 if (nla_put(skb, TEAM_ATTR_OPTION_DATA, ctx.data.bin_val.len,
2050 ctx.data.bin_val.ptr))
2051 goto nest_cancel;
2052 break;
2053 case TEAM_OPTION_TYPE_BOOL:
2054 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
2055 goto nest_cancel;
2056 if (ctx.data.bool_val &&
2057 nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
2058 goto nest_cancel;
2059 break;
2060 case TEAM_OPTION_TYPE_S32:
2061 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_S32))
2062 goto nest_cancel;
2063 if (nla_put_s32(skb, TEAM_ATTR_OPTION_DATA, ctx.data.s32_val))
2064 goto nest_cancel;
2065 break;
2066 default:
2067 BUG();
2068 }
2069 if (opt_inst->removed && nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
2070 goto nest_cancel;
2071 if (opt_inst->changed) {
2072 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
2073 goto nest_cancel;
2074 opt_inst->changed = false;
2075 }
2076 nla_nest_end(skb, option_item);
2077 return 0;
2078
2079nest_cancel:
2080 nla_nest_cancel(skb, option_item);
2081 return -EMSGSIZE;
2082}
2083
2084static int __send_and_alloc_skb(struct sk_buff **pskb,
2085 struct team *team, u32 portid,
2086 team_nl_send_func_t *send_func)
2087{
2088 int err;
2089
2090 if (*pskb) {
2091 err = send_func(*pskb, team, portid);
2092 if (err)
2093 return err;
2094 }
2095 *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2096 if (!*pskb)
2097 return -ENOMEM;
2098 return 0;
2099}
2100
2101static int team_nl_send_options_get(struct team *team, u32 portid, u32 seq,
2102 int flags, team_nl_send_func_t *send_func,
2103 struct list_head *sel_opt_inst_list)
2104{
2105 struct nlattr *option_list;
2106 struct nlmsghdr *nlh;
2107 void *hdr;
2108 struct team_option_inst *opt_inst;
2109 int err;
2110 struct sk_buff *skb = NULL;
2111 bool incomplete;
2112 int i;
2113
2114 opt_inst = list_first_entry(sel_opt_inst_list,
2115 struct team_option_inst, tmp_list);
2116
2117start_again:
2118 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2119 if (err)
2120 return err;
2121
2122 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2123 TEAM_CMD_OPTIONS_GET);
2124 if (!hdr) {
2125 nlmsg_free(skb);
2126 return -EMSGSIZE;
2127 }
2128
2129 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2130 goto nla_put_failure;
2131 option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
2132 if (!option_list)
2133 goto nla_put_failure;
2134
2135 i = 0;
2136 incomplete = false;
2137 list_for_each_entry_from(opt_inst, sel_opt_inst_list, tmp_list) {
2138 err = team_nl_fill_one_option_get(skb, team, opt_inst);
2139 if (err) {
2140 if (err == -EMSGSIZE) {
2141 if (!i)
2142 goto errout;
2143 incomplete = true;
2144 break;
2145 }
2146 goto errout;
2147 }
2148 i++;
2149 }
2150
2151 nla_nest_end(skb, option_list);
2152 genlmsg_end(skb, hdr);
2153 if (incomplete)
2154 goto start_again;
2155
2156send_done:
2157 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2158 if (!nlh) {
2159 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2160 if (err)
2161 goto errout;
2162 goto send_done;
2163 }
2164
2165 return send_func(skb, team, portid);
2166
2167nla_put_failure:
2168 err = -EMSGSIZE;
2169errout:
2170 genlmsg_cancel(skb, hdr);
2171 nlmsg_free(skb);
2172 return err;
2173}
2174
2175static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
2176{
2177 struct team *team;
2178 struct team_option_inst *opt_inst;
2179 int err;
2180 LIST_HEAD(sel_opt_inst_list);
2181
2182 team = team_nl_team_get(info);
2183 if (!team)
2184 return -EINVAL;
2185
2186 list_for_each_entry(opt_inst, &team->option_inst_list, list)
2187 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2188 err = team_nl_send_options_get(team, info->snd_portid, info->snd_seq,
2189 NLM_F_ACK, team_nl_send_unicast,
2190 &sel_opt_inst_list);
2191
2192 team_nl_team_put(team);
2193
2194 return err;
2195}
2196
2197static int team_nl_send_event_options_get(struct team *team,
2198 struct list_head *sel_opt_inst_list);
2199
2200static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
2201{
2202 struct team *team;
2203 int err = 0;
2204 int i;
2205 struct nlattr *nl_option;
2206 LIST_HEAD(opt_inst_list);
2207
2208 team = team_nl_team_get(info);
2209 if (!team)
2210 return -EINVAL;
2211
2212 err = -EINVAL;
2213 if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
2214 err = -EINVAL;
2215 goto team_put;
2216 }
2217
2218 nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
2219 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
2220 struct nlattr *attr;
2221 struct nlattr *attr_data;
2222 enum team_option_type opt_type;
2223 int opt_port_ifindex = 0; /* != 0 for per-port options */
2224 u32 opt_array_index = 0;
2225 bool opt_is_array = false;
2226 struct team_option_inst *opt_inst;
2227 char *opt_name;
2228 bool opt_found = false;
2229
2230 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
2231 err = -EINVAL;
2232 goto team_put;
2233 }
2234 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
2235 nl_option, team_nl_option_policy);
2236 if (err)
2237 goto team_put;
2238 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
2239 !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
2240 err = -EINVAL;
2241 goto team_put;
2242 }
2243 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
2244 case NLA_U32:
2245 opt_type = TEAM_OPTION_TYPE_U32;
2246 break;
2247 case NLA_STRING:
2248 opt_type = TEAM_OPTION_TYPE_STRING;
2249 break;
2250 case NLA_BINARY:
2251 opt_type = TEAM_OPTION_TYPE_BINARY;
2252 break;
2253 case NLA_FLAG:
2254 opt_type = TEAM_OPTION_TYPE_BOOL;
2255 break;
2256 case NLA_S32:
2257 opt_type = TEAM_OPTION_TYPE_S32;
2258 break;
2259 default:
2260 goto team_put;
2261 }
2262
2263 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
2264 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
2265 err = -EINVAL;
2266 goto team_put;
2267 }
2268
2269 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
2270 attr = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
2271 if (attr)
2272 opt_port_ifindex = nla_get_u32(attr);
2273
2274 attr = opt_attrs[TEAM_ATTR_OPTION_ARRAY_INDEX];
2275 if (attr) {
2276 opt_is_array = true;
2277 opt_array_index = nla_get_u32(attr);
2278 }
2279
2280 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2281 struct team_option *option = opt_inst->option;
2282 struct team_gsetter_ctx ctx;
2283 struct team_option_inst_info *opt_inst_info;
2284 int tmp_ifindex;
2285
2286 opt_inst_info = &opt_inst->info;
2287 tmp_ifindex = opt_inst_info->port ?
2288 opt_inst_info->port->dev->ifindex : 0;
2289 if (option->type != opt_type ||
2290 strcmp(option->name, opt_name) ||
2291 tmp_ifindex != opt_port_ifindex ||
2292 (option->array_size && !opt_is_array) ||
2293 opt_inst_info->array_index != opt_array_index)
2294 continue;
2295 opt_found = true;
2296 ctx.info = opt_inst_info;
2297 switch (opt_type) {
2298 case TEAM_OPTION_TYPE_U32:
2299 ctx.data.u32_val = nla_get_u32(attr_data);
2300 break;
2301 case TEAM_OPTION_TYPE_STRING:
2302 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
2303 err = -EINVAL;
2304 goto team_put;
2305 }
2306 ctx.data.str_val = nla_data(attr_data);
2307 break;
2308 case TEAM_OPTION_TYPE_BINARY:
2309 ctx.data.bin_val.len = nla_len(attr_data);
2310 ctx.data.bin_val.ptr = nla_data(attr_data);
2311 break;
2312 case TEAM_OPTION_TYPE_BOOL:
2313 ctx.data.bool_val = attr_data ? true : false;
2314 break;
2315 case TEAM_OPTION_TYPE_S32:
2316 ctx.data.s32_val = nla_get_s32(attr_data);
2317 break;
2318 default:
2319 BUG();
2320 }
2321 err = team_option_set(team, opt_inst, &ctx);
2322 if (err)
2323 goto team_put;
2324 opt_inst->changed = true;
2325 list_add(&opt_inst->tmp_list, &opt_inst_list);
2326 }
2327 if (!opt_found) {
2328 err = -ENOENT;
2329 goto team_put;
2330 }
2331 }
2332
2333 err = team_nl_send_event_options_get(team, &opt_inst_list);
2334
2335team_put:
2336 team_nl_team_put(team);
2337
2338 return err;
2339}
2340
2341static int team_nl_fill_one_port_get(struct sk_buff *skb,
2342 struct team_port *port)
2343{
2344 struct nlattr *port_item;
2345
2346 port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
2347 if (!port_item)
2348 goto nest_cancel;
2349 if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
2350 goto nest_cancel;
2351 if (port->changed) {
2352 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
2353 goto nest_cancel;
2354 port->changed = false;
2355 }
2356 if ((port->removed &&
2357 nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
2358 (port->state.linkup &&
2359 nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
2360 nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
2361 nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
2362 goto nest_cancel;
2363 nla_nest_end(skb, port_item);
2364 return 0;
2365
2366nest_cancel:
2367 nla_nest_cancel(skb, port_item);
2368 return -EMSGSIZE;
2369}
2370
2371static int team_nl_send_port_list_get(struct team *team, u32 portid, u32 seq,
2372 int flags, team_nl_send_func_t *send_func,
2373 struct team_port *one_port)
2374{
2375 struct nlattr *port_list;
2376 struct nlmsghdr *nlh;
2377 void *hdr;
2378 struct team_port *port;
2379 int err;
2380 struct sk_buff *skb = NULL;
2381 bool incomplete;
2382 int i;
2383
2384 port = list_first_entry_or_null(&team->port_list,
2385 struct team_port, list);
2386
2387start_again:
2388 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2389 if (err)
2390 return err;
2391
2392 hdr = genlmsg_put(skb, portid, seq, &team_nl_family, flags | NLM_F_MULTI,
2393 TEAM_CMD_PORT_LIST_GET);
2394 if (!hdr) {
2395 nlmsg_free(skb);
2396 return -EMSGSIZE;
2397 }
2398
2399 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
2400 goto nla_put_failure;
2401 port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
2402 if (!port_list)
2403 goto nla_put_failure;
2404
2405 i = 0;
2406 incomplete = false;
2407
2408 /* If one port is selected, called wants to send port list containing
2409 * only this port. Otherwise go through all listed ports and send all
2410 */
2411 if (one_port) {
2412 err = team_nl_fill_one_port_get(skb, one_port);
2413 if (err)
2414 goto errout;
2415 } else if (port) {
2416 list_for_each_entry_from(port, &team->port_list, list) {
2417 err = team_nl_fill_one_port_get(skb, port);
2418 if (err) {
2419 if (err == -EMSGSIZE) {
2420 if (!i)
2421 goto errout;
2422 incomplete = true;
2423 break;
2424 }
2425 goto errout;
2426 }
2427 i++;
2428 }
2429 }
2430
2431 nla_nest_end(skb, port_list);
2432 genlmsg_end(skb, hdr);
2433 if (incomplete)
2434 goto start_again;
2435
2436send_done:
2437 nlh = nlmsg_put(skb, portid, seq, NLMSG_DONE, 0, flags | NLM_F_MULTI);
2438 if (!nlh) {
2439 err = __send_and_alloc_skb(&skb, team, portid, send_func);
2440 if (err)
2441 goto errout;
2442 goto send_done;
2443 }
2444
2445 return send_func(skb, team, portid);
2446
2447nla_put_failure:
2448 err = -EMSGSIZE;
2449errout:
2450 genlmsg_cancel(skb, hdr);
2451 nlmsg_free(skb);
2452 return err;
2453}
2454
2455static int team_nl_cmd_port_list_get(struct sk_buff *skb,
2456 struct genl_info *info)
2457{
2458 struct team *team;
2459 int err;
2460
2461 team = team_nl_team_get(info);
2462 if (!team)
2463 return -EINVAL;
2464
2465 err = team_nl_send_port_list_get(team, info->snd_portid, info->snd_seq,
2466 NLM_F_ACK, team_nl_send_unicast, NULL);
2467
2468 team_nl_team_put(team);
2469
2470 return err;
2471}
2472
2473static struct genl_ops team_nl_ops[] = {
2474 {
2475 .cmd = TEAM_CMD_NOOP,
2476 .doit = team_nl_cmd_noop,
2477 .policy = team_nl_policy,
2478 },
2479 {
2480 .cmd = TEAM_CMD_OPTIONS_SET,
2481 .doit = team_nl_cmd_options_set,
2482 .policy = team_nl_policy,
2483 .flags = GENL_ADMIN_PERM,
2484 },
2485 {
2486 .cmd = TEAM_CMD_OPTIONS_GET,
2487 .doit = team_nl_cmd_options_get,
2488 .policy = team_nl_policy,
2489 .flags = GENL_ADMIN_PERM,
2490 },
2491 {
2492 .cmd = TEAM_CMD_PORT_LIST_GET,
2493 .doit = team_nl_cmd_port_list_get,
2494 .policy = team_nl_policy,
2495 .flags = GENL_ADMIN_PERM,
2496 },
2497};
2498
2499static struct genl_multicast_group team_change_event_mcgrp = {
2500 .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME,
2501};
2502
2503static int team_nl_send_multicast(struct sk_buff *skb,
2504 struct team *team, u32 portid)
2505{
2506 return genlmsg_multicast_netns(dev_net(team->dev), skb, 0,
2507 team_change_event_mcgrp.id, GFP_KERNEL);
2508}
2509
2510static int team_nl_send_event_options_get(struct team *team,
2511 struct list_head *sel_opt_inst_list)
2512{
2513 return team_nl_send_options_get(team, 0, 0, 0, team_nl_send_multicast,
2514 sel_opt_inst_list);
2515}
2516
2517static int team_nl_send_event_port_get(struct team *team,
2518 struct team_port *port)
2519{
2520 return team_nl_send_port_list_get(team, 0, 0, 0, team_nl_send_multicast,
2521 port);
2522}
2523
2524static int team_nl_init(void)
2525{
2526 int err;
2527
2528 err = genl_register_family_with_ops(&team_nl_family, team_nl_ops,
2529 ARRAY_SIZE(team_nl_ops));
2530 if (err)
2531 return err;
2532
2533 err = genl_register_mc_group(&team_nl_family, &team_change_event_mcgrp);
2534 if (err)
2535 goto err_change_event_grp_reg;
2536
2537 return 0;
2538
2539err_change_event_grp_reg:
2540 genl_unregister_family(&team_nl_family);
2541
2542 return err;
2543}
2544
2545static void team_nl_fini(void)
2546{
2547 genl_unregister_family(&team_nl_family);
2548}
2549
2550
2551/******************
2552 * Change checkers
2553 ******************/
2554
2555static void __team_options_change_check(struct team *team)
2556{
2557 int err;
2558 struct team_option_inst *opt_inst;
2559 LIST_HEAD(sel_opt_inst_list);
2560
2561 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
2562 if (opt_inst->changed)
2563 list_add_tail(&opt_inst->tmp_list, &sel_opt_inst_list);
2564 }
2565 err = team_nl_send_event_options_get(team, &sel_opt_inst_list);
2566 if (err && err != -ESRCH)
2567 netdev_warn(team->dev, "Failed to send options change via netlink (err %d)\n",
2568 err);
2569}
2570
2571/* rtnl lock is held */
2572
2573static void __team_port_change_send(struct team_port *port, bool linkup)
2574{
2575 int err;
2576
2577 port->changed = true;
2578 port->state.linkup = linkup;
2579 team_refresh_port_linkup(port);
2580 if (linkup) {
2581 struct ethtool_cmd ecmd;
2582
2583 err = __ethtool_get_settings(port->dev, &ecmd);
2584 if (!err) {
2585 port->state.speed = ethtool_cmd_speed(&ecmd);
2586 port->state.duplex = ecmd.duplex;
2587 goto send_event;
2588 }
2589 }
2590 port->state.speed = 0;
2591 port->state.duplex = 0;
2592
2593send_event:
2594 err = team_nl_send_event_port_get(port->team, port);
2595 if (err && err != -ESRCH)
2596 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink (err %d)\n",
2597 port->dev->name, err);
2598
2599}
2600
2601static void __team_carrier_check(struct team *team)
2602{
2603 struct team_port *port;
2604 bool team_linkup;
2605
2606 if (team->user_carrier_enabled)
2607 return;
2608
2609 team_linkup = false;
2610 list_for_each_entry(port, &team->port_list, list) {
2611 if (port->linkup) {
2612 team_linkup = true;
2613 break;
2614 }
2615 }
2616
2617 if (team_linkup)
2618 netif_carrier_on(team->dev);
2619 else
2620 netif_carrier_off(team->dev);
2621}
2622
2623static void __team_port_change_check(struct team_port *port, bool linkup)
2624{
2625 if (port->state.linkup != linkup)
2626 __team_port_change_send(port, linkup);
2627 __team_carrier_check(port->team);
2628}
2629
2630static void __team_port_change_port_added(struct team_port *port, bool linkup)
2631{
2632 __team_port_change_send(port, linkup);
2633 __team_carrier_check(port->team);
2634}
2635
2636static void __team_port_change_port_removed(struct team_port *port)
2637{
2638 port->removed = true;
2639 __team_port_change_send(port, false);
2640 __team_carrier_check(port->team);
2641}
2642
2643static void team_port_change_check(struct team_port *port, bool linkup)
2644{
2645 struct team *team = port->team;
2646
2647 mutex_lock(&team->lock);
2648 __team_port_change_check(port, linkup);
2649 mutex_unlock(&team->lock);
2650}
2651
2652
2653/************************************
2654 * Net device notifier event handler
2655 ************************************/
2656
2657static int team_device_event(struct notifier_block *unused,
2658 unsigned long event, void *ptr)
2659{
2660 struct net_device *dev = (struct net_device *) ptr;
2661 struct team_port *port;
2662
2663 port = team_port_get_rtnl(dev);
2664 if (!port)
2665 return NOTIFY_DONE;
2666
2667 switch (event) {
2668 case NETDEV_UP:
2669 if (netif_carrier_ok(dev))
2670 team_port_change_check(port, true);
2671 case NETDEV_DOWN:
2672 team_port_change_check(port, false);
2673 case NETDEV_CHANGE:
2674 if (netif_running(port->dev))
2675 team_port_change_check(port,
2676 !!netif_carrier_ok(port->dev));
2677 break;
2678 case NETDEV_UNREGISTER:
2679 team_del_slave(port->team->dev, dev);
2680 break;
2681 case NETDEV_FEAT_CHANGE:
2682 team_compute_features(port->team);
2683 break;
2684 case NETDEV_CHANGEMTU:
2685 /* Forbid to change mtu of underlaying device */
2686 if (!port->team->port_mtu_change_allowed)
2687 return NOTIFY_BAD;
2688 break;
2689 case NETDEV_PRE_TYPE_CHANGE:
2690 /* Forbid to change type of underlaying device */
2691 return NOTIFY_BAD;
2692 }
2693 return NOTIFY_DONE;
2694}
2695
2696static struct notifier_block team_notifier_block __read_mostly = {
2697 .notifier_call = team_device_event,
2698};
2699
2700
2701/***********************
2702 * Module init and exit
2703 ***********************/
2704
2705static int __init team_module_init(void)
2706{
2707 int err;
2708
2709 register_netdevice_notifier(&team_notifier_block);
2710
2711 err = rtnl_link_register(&team_link_ops);
2712 if (err)
2713 goto err_rtnl_reg;
2714
2715 err = team_nl_init();
2716 if (err)
2717 goto err_nl_init;
2718
2719 return 0;
2720
2721err_nl_init:
2722 rtnl_link_unregister(&team_link_ops);
2723
2724err_rtnl_reg:
2725 unregister_netdevice_notifier(&team_notifier_block);
2726
2727 return err;
2728}
2729
2730static void __exit team_module_exit(void)
2731{
2732 team_nl_fini();
2733 rtnl_link_unregister(&team_link_ops);
2734 unregister_netdevice_notifier(&team_notifier_block);
2735}
2736
2737module_init(team_module_init);
2738module_exit(team_module_exit);
2739
2740MODULE_LICENSE("GPL v2");
2741MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
2742MODULE_DESCRIPTION("Ethernet team device driver");
2743MODULE_ALIAS_RTNL_LINK(DRV_NAME);
kernel source for telekom puls (alcatel/mediatek)