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Merge branch 'sbp-target-merge' of git://git.kernel.org/pub/scm/linux/kernel/git...
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / net / team / team.c
1 /*
2 * net/drivers/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/if_vlan.h>
22 #include <linux/if_arp.h>
23 #include <linux/socket.h>
24 #include <linux/etherdevice.h>
25 #include <linux/rtnetlink.h>
26 #include <net/rtnetlink.h>
27 #include <net/genetlink.h>
28 #include <net/netlink.h>
29 #include <linux/if_team.h>
30
31 #define DRV_NAME "team"
32
33
34 /**********
35 * Helpers
36 **********/
37
38 #define team_port_exists(dev) (dev->priv_flags & IFF_TEAM_PORT)
39
40 static struct team_port *team_port_get_rcu(const struct net_device *dev)
41 {
42 struct team_port *port = rcu_dereference(dev->rx_handler_data);
43
44 return team_port_exists(dev) ? port : NULL;
45 }
46
47 static struct team_port *team_port_get_rtnl(const struct net_device *dev)
48 {
49 struct team_port *port = rtnl_dereference(dev->rx_handler_data);
50
51 return team_port_exists(dev) ? port : NULL;
52 }
53
54 /*
55 * Since the ability to change mac address for open port device is tested in
56 * team_port_add, this function can be called without control of return value
57 */
58 static int __set_port_mac(struct net_device *port_dev,
59 const unsigned char *dev_addr)
60 {
61 struct sockaddr addr;
62
63 memcpy(addr.sa_data, dev_addr, ETH_ALEN);
64 addr.sa_family = ARPHRD_ETHER;
65 return dev_set_mac_address(port_dev, &addr);
66 }
67
68 static int team_port_set_orig_mac(struct team_port *port)
69 {
70 return __set_port_mac(port->dev, port->orig.dev_addr);
71 }
72
73 int team_port_set_team_mac(struct team_port *port)
74 {
75 return __set_port_mac(port->dev, port->team->dev->dev_addr);
76 }
77 EXPORT_SYMBOL(team_port_set_team_mac);
78
79 static void team_refresh_port_linkup(struct team_port *port)
80 {
81 port->linkup = port->user.linkup_enabled ? port->user.linkup :
82 port->state.linkup;
83 }
84
85 /*******************
86 * Options handling
87 *******************/
88
89 struct team_option_inst { /* One for each option instance */
90 struct list_head list;
91 struct team_option *option;
92 struct team_port *port; /* != NULL if per-port */
93 bool changed;
94 bool removed;
95 };
96
97 static struct team_option *__team_find_option(struct team *team,
98 const char *opt_name)
99 {
100 struct team_option *option;
101
102 list_for_each_entry(option, &team->option_list, list) {
103 if (strcmp(option->name, opt_name) == 0)
104 return option;
105 }
106 return NULL;
107 }
108
109 static int __team_option_inst_add(struct team *team, struct team_option *option,
110 struct team_port *port)
111 {
112 struct team_option_inst *opt_inst;
113
114 opt_inst = kmalloc(sizeof(*opt_inst), GFP_KERNEL);
115 if (!opt_inst)
116 return -ENOMEM;
117 opt_inst->option = option;
118 opt_inst->port = port;
119 opt_inst->changed = true;
120 opt_inst->removed = false;
121 list_add_tail(&opt_inst->list, &team->option_inst_list);
122 return 0;
123 }
124
125 static void __team_option_inst_del(struct team_option_inst *opt_inst)
126 {
127 list_del(&opt_inst->list);
128 kfree(opt_inst);
129 }
130
131 static 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
142 static int __team_option_inst_add_option(struct team *team,
143 struct team_option *option)
144 {
145 struct team_port *port;
146 int err;
147
148 if (!option->per_port)
149 return __team_option_inst_add(team, option, 0);
150
151 list_for_each_entry(port, &team->port_list, list) {
152 err = __team_option_inst_add(team, option, port);
153 if (err)
154 goto inst_del_option;
155 }
156 return 0;
157
158 inst_del_option:
159 __team_option_inst_del_option(team, option);
160 return err;
161 }
162
163 static void __team_option_inst_mark_removed_option(struct team *team,
164 struct team_option *option)
165 {
166 struct team_option_inst *opt_inst;
167
168 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
169 if (opt_inst->option == option) {
170 opt_inst->changed = true;
171 opt_inst->removed = true;
172 }
173 }
174 }
175
176 static void __team_option_inst_del_port(struct team *team,
177 struct team_port *port)
178 {
179 struct team_option_inst *opt_inst, *tmp;
180
181 list_for_each_entry_safe(opt_inst, tmp, &team->option_inst_list, list) {
182 if (opt_inst->option->per_port &&
183 opt_inst->port == port)
184 __team_option_inst_del(opt_inst);
185 }
186 }
187
188 static int __team_option_inst_add_port(struct team *team,
189 struct team_port *port)
190 {
191 struct team_option *option;
192 int err;
193
194 list_for_each_entry(option, &team->option_list, list) {
195 if (!option->per_port)
196 continue;
197 err = __team_option_inst_add(team, option, port);
198 if (err)
199 goto inst_del_port;
200 }
201 return 0;
202
203 inst_del_port:
204 __team_option_inst_del_port(team, port);
205 return err;
206 }
207
208 static void __team_option_inst_mark_removed_port(struct team *team,
209 struct team_port *port)
210 {
211 struct team_option_inst *opt_inst;
212
213 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
214 if (opt_inst->port == port) {
215 opt_inst->changed = true;
216 opt_inst->removed = true;
217 }
218 }
219 }
220
221 static int __team_options_register(struct team *team,
222 const struct team_option *option,
223 size_t option_count)
224 {
225 int i;
226 struct team_option **dst_opts;
227 int err;
228
229 dst_opts = kzalloc(sizeof(struct team_option *) * option_count,
230 GFP_KERNEL);
231 if (!dst_opts)
232 return -ENOMEM;
233 for (i = 0; i < option_count; i++, option++) {
234 if (__team_find_option(team, option->name)) {
235 err = -EEXIST;
236 goto alloc_rollback;
237 }
238 dst_opts[i] = kmemdup(option, sizeof(*option), GFP_KERNEL);
239 if (!dst_opts[i]) {
240 err = -ENOMEM;
241 goto alloc_rollback;
242 }
243 }
244
245 for (i = 0; i < option_count; i++) {
246 err = __team_option_inst_add_option(team, dst_opts[i]);
247 if (err)
248 goto inst_rollback;
249 list_add_tail(&dst_opts[i]->list, &team->option_list);
250 }
251
252 kfree(dst_opts);
253 return 0;
254
255 inst_rollback:
256 for (i--; i >= 0; i--)
257 __team_option_inst_del_option(team, dst_opts[i]);
258
259 i = option_count - 1;
260 alloc_rollback:
261 for (i--; i >= 0; i--)
262 kfree(dst_opts[i]);
263
264 kfree(dst_opts);
265 return err;
266 }
267
268 static void __team_options_mark_removed(struct team *team,
269 const struct team_option *option,
270 size_t option_count)
271 {
272 int i;
273
274 for (i = 0; i < option_count; i++, option++) {
275 struct team_option *del_opt;
276
277 del_opt = __team_find_option(team, option->name);
278 if (del_opt)
279 __team_option_inst_mark_removed_option(team, del_opt);
280 }
281 }
282
283 static void __team_options_unregister(struct team *team,
284 const struct team_option *option,
285 size_t option_count)
286 {
287 int i;
288
289 for (i = 0; i < option_count; i++, option++) {
290 struct team_option *del_opt;
291
292 del_opt = __team_find_option(team, option->name);
293 if (del_opt) {
294 __team_option_inst_del_option(team, del_opt);
295 list_del(&del_opt->list);
296 kfree(del_opt);
297 }
298 }
299 }
300
301 static void __team_options_change_check(struct team *team);
302
303 int team_options_register(struct team *team,
304 const struct team_option *option,
305 size_t option_count)
306 {
307 int err;
308
309 err = __team_options_register(team, option, option_count);
310 if (err)
311 return err;
312 __team_options_change_check(team);
313 return 0;
314 }
315 EXPORT_SYMBOL(team_options_register);
316
317 void team_options_unregister(struct team *team,
318 const struct team_option *option,
319 size_t option_count)
320 {
321 __team_options_mark_removed(team, option, option_count);
322 __team_options_change_check(team);
323 __team_options_unregister(team, option, option_count);
324 }
325 EXPORT_SYMBOL(team_options_unregister);
326
327 static int team_option_port_add(struct team *team, struct team_port *port)
328 {
329 int err;
330
331 err = __team_option_inst_add_port(team, port);
332 if (err)
333 return err;
334 __team_options_change_check(team);
335 return 0;
336 }
337
338 static void team_option_port_del(struct team *team, struct team_port *port)
339 {
340 __team_option_inst_mark_removed_port(team, port);
341 __team_options_change_check(team);
342 __team_option_inst_del_port(team, port);
343 }
344
345 static int team_option_get(struct team *team,
346 struct team_option_inst *opt_inst,
347 struct team_gsetter_ctx *ctx)
348 {
349 return opt_inst->option->getter(team, ctx);
350 }
351
352 static int team_option_set(struct team *team,
353 struct team_option_inst *opt_inst,
354 struct team_gsetter_ctx *ctx)
355 {
356 int err;
357
358 err = opt_inst->option->setter(team, ctx);
359 if (err)
360 return err;
361
362 opt_inst->changed = true;
363 __team_options_change_check(team);
364 return err;
365 }
366
367 /****************
368 * Mode handling
369 ****************/
370
371 static LIST_HEAD(mode_list);
372 static DEFINE_SPINLOCK(mode_list_lock);
373
374 static struct team_mode *__find_mode(const char *kind)
375 {
376 struct team_mode *mode;
377
378 list_for_each_entry(mode, &mode_list, list) {
379 if (strcmp(mode->kind, kind) == 0)
380 return mode;
381 }
382 return NULL;
383 }
384
385 static bool is_good_mode_name(const char *name)
386 {
387 while (*name != '\0') {
388 if (!isalpha(*name) && !isdigit(*name) && *name != '_')
389 return false;
390 name++;
391 }
392 return true;
393 }
394
395 int team_mode_register(struct team_mode *mode)
396 {
397 int err = 0;
398
399 if (!is_good_mode_name(mode->kind) ||
400 mode->priv_size > TEAM_MODE_PRIV_SIZE)
401 return -EINVAL;
402 spin_lock(&mode_list_lock);
403 if (__find_mode(mode->kind)) {
404 err = -EEXIST;
405 goto unlock;
406 }
407 list_add_tail(&mode->list, &mode_list);
408 unlock:
409 spin_unlock(&mode_list_lock);
410 return err;
411 }
412 EXPORT_SYMBOL(team_mode_register);
413
414 int team_mode_unregister(struct team_mode *mode)
415 {
416 spin_lock(&mode_list_lock);
417 list_del_init(&mode->list);
418 spin_unlock(&mode_list_lock);
419 return 0;
420 }
421 EXPORT_SYMBOL(team_mode_unregister);
422
423 static struct team_mode *team_mode_get(const char *kind)
424 {
425 struct team_mode *mode;
426
427 spin_lock(&mode_list_lock);
428 mode = __find_mode(kind);
429 if (!mode) {
430 spin_unlock(&mode_list_lock);
431 request_module("team-mode-%s", kind);
432 spin_lock(&mode_list_lock);
433 mode = __find_mode(kind);
434 }
435 if (mode)
436 if (!try_module_get(mode->owner))
437 mode = NULL;
438
439 spin_unlock(&mode_list_lock);
440 return mode;
441 }
442
443 static void team_mode_put(const struct team_mode *mode)
444 {
445 module_put(mode->owner);
446 }
447
448 static bool team_dummy_transmit(struct team *team, struct sk_buff *skb)
449 {
450 dev_kfree_skb_any(skb);
451 return false;
452 }
453
454 rx_handler_result_t team_dummy_receive(struct team *team,
455 struct team_port *port,
456 struct sk_buff *skb)
457 {
458 return RX_HANDLER_ANOTHER;
459 }
460
461 static void team_adjust_ops(struct team *team)
462 {
463 /*
464 * To avoid checks in rx/tx skb paths, ensure here that non-null and
465 * correct ops are always set.
466 */
467
468 if (list_empty(&team->port_list) ||
469 !team->mode || !team->mode->ops->transmit)
470 team->ops.transmit = team_dummy_transmit;
471 else
472 team->ops.transmit = team->mode->ops->transmit;
473
474 if (list_empty(&team->port_list) ||
475 !team->mode || !team->mode->ops->receive)
476 team->ops.receive = team_dummy_receive;
477 else
478 team->ops.receive = team->mode->ops->receive;
479 }
480
481 /*
482 * We can benefit from the fact that it's ensured no port is present
483 * at the time of mode change. Therefore no packets are in fly so there's no
484 * need to set mode operations in any special way.
485 */
486 static int __team_change_mode(struct team *team,
487 const struct team_mode *new_mode)
488 {
489 /* Check if mode was previously set and do cleanup if so */
490 if (team->mode) {
491 void (*exit_op)(struct team *team) = team->ops.exit;
492
493 /* Clear ops area so no callback is called any longer */
494 memset(&team->ops, 0, sizeof(struct team_mode_ops));
495 team_adjust_ops(team);
496
497 if (exit_op)
498 exit_op(team);
499 team_mode_put(team->mode);
500 team->mode = NULL;
501 /* zero private data area */
502 memset(&team->mode_priv, 0,
503 sizeof(struct team) - offsetof(struct team, mode_priv));
504 }
505
506 if (!new_mode)
507 return 0;
508
509 if (new_mode->ops->init) {
510 int err;
511
512 err = new_mode->ops->init(team);
513 if (err)
514 return err;
515 }
516
517 team->mode = new_mode;
518 memcpy(&team->ops, new_mode->ops, sizeof(struct team_mode_ops));
519 team_adjust_ops(team);
520
521 return 0;
522 }
523
524 static int team_change_mode(struct team *team, const char *kind)
525 {
526 struct team_mode *new_mode;
527 struct net_device *dev = team->dev;
528 int err;
529
530 if (!list_empty(&team->port_list)) {
531 netdev_err(dev, "No ports can be present during mode change\n");
532 return -EBUSY;
533 }
534
535 if (team->mode && strcmp(team->mode->kind, kind) == 0) {
536 netdev_err(dev, "Unable to change to the same mode the team is in\n");
537 return -EINVAL;
538 }
539
540 new_mode = team_mode_get(kind);
541 if (!new_mode) {
542 netdev_err(dev, "Mode \"%s\" not found\n", kind);
543 return -EINVAL;
544 }
545
546 err = __team_change_mode(team, new_mode);
547 if (err) {
548 netdev_err(dev, "Failed to change to mode \"%s\"\n", kind);
549 team_mode_put(new_mode);
550 return err;
551 }
552
553 netdev_info(dev, "Mode changed to \"%s\"\n", kind);
554 return 0;
555 }
556
557
558 /************************
559 * Rx path frame handler
560 ************************/
561
562 static bool team_port_enabled(struct team_port *port);
563
564 /* note: already called with rcu_read_lock */
565 static rx_handler_result_t team_handle_frame(struct sk_buff **pskb)
566 {
567 struct sk_buff *skb = *pskb;
568 struct team_port *port;
569 struct team *team;
570 rx_handler_result_t res;
571
572 skb = skb_share_check(skb, GFP_ATOMIC);
573 if (!skb)
574 return RX_HANDLER_CONSUMED;
575
576 *pskb = skb;
577
578 port = team_port_get_rcu(skb->dev);
579 team = port->team;
580 if (!team_port_enabled(port)) {
581 /* allow exact match delivery for disabled ports */
582 res = RX_HANDLER_EXACT;
583 } else {
584 res = team->ops.receive(team, port, skb);
585 }
586 if (res == RX_HANDLER_ANOTHER) {
587 struct team_pcpu_stats *pcpu_stats;
588
589 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
590 u64_stats_update_begin(&pcpu_stats->syncp);
591 pcpu_stats->rx_packets++;
592 pcpu_stats->rx_bytes += skb->len;
593 if (skb->pkt_type == PACKET_MULTICAST)
594 pcpu_stats->rx_multicast++;
595 u64_stats_update_end(&pcpu_stats->syncp);
596
597 skb->dev = team->dev;
598 } else {
599 this_cpu_inc(team->pcpu_stats->rx_dropped);
600 }
601
602 return res;
603 }
604
605
606 /****************
607 * Port handling
608 ****************/
609
610 static bool team_port_find(const struct team *team,
611 const struct team_port *port)
612 {
613 struct team_port *cur;
614
615 list_for_each_entry(cur, &team->port_list, list)
616 if (cur == port)
617 return true;
618 return false;
619 }
620
621 static bool team_port_enabled(struct team_port *port)
622 {
623 return port->index != -1;
624 }
625
626 /*
627 * Enable/disable port by adding to enabled port hashlist and setting
628 * port->index (Might be racy so reader could see incorrect ifindex when
629 * processing a flying packet, but that is not a problem). Write guarded
630 * by team->lock.
631 */
632 static void team_port_enable(struct team *team,
633 struct team_port *port)
634 {
635 if (team_port_enabled(port))
636 return;
637 port->index = team->en_port_count++;
638 hlist_add_head_rcu(&port->hlist,
639 team_port_index_hash(team, port->index));
640 }
641
642 static void __reconstruct_port_hlist(struct team *team, int rm_index)
643 {
644 int i;
645 struct team_port *port;
646
647 for (i = rm_index + 1; i < team->en_port_count; i++) {
648 port = team_get_port_by_index(team, i);
649 hlist_del_rcu(&port->hlist);
650 port->index--;
651 hlist_add_head_rcu(&port->hlist,
652 team_port_index_hash(team, port->index));
653 }
654 }
655
656 static void team_port_disable(struct team *team,
657 struct team_port *port)
658 {
659 int rm_index = port->index;
660
661 if (!team_port_enabled(port))
662 return;
663 hlist_del_rcu(&port->hlist);
664 __reconstruct_port_hlist(team, rm_index);
665 team->en_port_count--;
666 port->index = -1;
667 }
668
669 #define TEAM_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \
670 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
671 NETIF_F_HIGHDMA | NETIF_F_LRO)
672
673 static void __team_compute_features(struct team *team)
674 {
675 struct team_port *port;
676 u32 vlan_features = TEAM_VLAN_FEATURES;
677 unsigned short max_hard_header_len = ETH_HLEN;
678
679 list_for_each_entry(port, &team->port_list, list) {
680 vlan_features = netdev_increment_features(vlan_features,
681 port->dev->vlan_features,
682 TEAM_VLAN_FEATURES);
683
684 if (port->dev->hard_header_len > max_hard_header_len)
685 max_hard_header_len = port->dev->hard_header_len;
686 }
687
688 team->dev->vlan_features = vlan_features;
689 team->dev->hard_header_len = max_hard_header_len;
690
691 netdev_change_features(team->dev);
692 }
693
694 static void team_compute_features(struct team *team)
695 {
696 mutex_lock(&team->lock);
697 __team_compute_features(team);
698 mutex_unlock(&team->lock);
699 }
700
701 static int team_port_enter(struct team *team, struct team_port *port)
702 {
703 int err = 0;
704
705 dev_hold(team->dev);
706 port->dev->priv_flags |= IFF_TEAM_PORT;
707 if (team->ops.port_enter) {
708 err = team->ops.port_enter(team, port);
709 if (err) {
710 netdev_err(team->dev, "Device %s failed to enter team mode\n",
711 port->dev->name);
712 goto err_port_enter;
713 }
714 }
715
716 return 0;
717
718 err_port_enter:
719 port->dev->priv_flags &= ~IFF_TEAM_PORT;
720 dev_put(team->dev);
721
722 return err;
723 }
724
725 static void team_port_leave(struct team *team, struct team_port *port)
726 {
727 if (team->ops.port_leave)
728 team->ops.port_leave(team, port);
729 port->dev->priv_flags &= ~IFF_TEAM_PORT;
730 dev_put(team->dev);
731 }
732
733 static void __team_port_change_check(struct team_port *port, bool linkup);
734
735 static int team_port_add(struct team *team, struct net_device *port_dev)
736 {
737 struct net_device *dev = team->dev;
738 struct team_port *port;
739 char *portname = port_dev->name;
740 int err;
741
742 if (port_dev->flags & IFF_LOOPBACK ||
743 port_dev->type != ARPHRD_ETHER) {
744 netdev_err(dev, "Device %s is of an unsupported type\n",
745 portname);
746 return -EINVAL;
747 }
748
749 if (team_port_exists(port_dev)) {
750 netdev_err(dev, "Device %s is already a port "
751 "of a team device\n", portname);
752 return -EBUSY;
753 }
754
755 if (port_dev->flags & IFF_UP) {
756 netdev_err(dev, "Device %s is up. Set it down before adding it as a team port\n",
757 portname);
758 return -EBUSY;
759 }
760
761 port = kzalloc(sizeof(struct team_port), GFP_KERNEL);
762 if (!port)
763 return -ENOMEM;
764
765 port->dev = port_dev;
766 port->team = team;
767
768 port->orig.mtu = port_dev->mtu;
769 err = dev_set_mtu(port_dev, dev->mtu);
770 if (err) {
771 netdev_dbg(dev, "Error %d calling dev_set_mtu\n", err);
772 goto err_set_mtu;
773 }
774
775 memcpy(port->orig.dev_addr, port_dev->dev_addr, ETH_ALEN);
776
777 err = team_port_enter(team, port);
778 if (err) {
779 netdev_err(dev, "Device %s failed to enter team mode\n",
780 portname);
781 goto err_port_enter;
782 }
783
784 err = dev_open(port_dev);
785 if (err) {
786 netdev_dbg(dev, "Device %s opening failed\n",
787 portname);
788 goto err_dev_open;
789 }
790
791 err = vlan_vids_add_by_dev(port_dev, dev);
792 if (err) {
793 netdev_err(dev, "Failed to add vlan ids to device %s\n",
794 portname);
795 goto err_vids_add;
796 }
797
798 err = netdev_set_master(port_dev, dev);
799 if (err) {
800 netdev_err(dev, "Device %s failed to set master\n", portname);
801 goto err_set_master;
802 }
803
804 err = netdev_rx_handler_register(port_dev, team_handle_frame,
805 port);
806 if (err) {
807 netdev_err(dev, "Device %s failed to register rx_handler\n",
808 portname);
809 goto err_handler_register;
810 }
811
812 err = team_option_port_add(team, port);
813 if (err) {
814 netdev_err(dev, "Device %s failed to add per-port options\n",
815 portname);
816 goto err_option_port_add;
817 }
818
819 port->index = -1;
820 team_port_enable(team, port);
821 list_add_tail_rcu(&port->list, &team->port_list);
822 team_adjust_ops(team);
823 __team_compute_features(team);
824 __team_port_change_check(port, !!netif_carrier_ok(port_dev));
825
826 netdev_info(dev, "Port device %s added\n", portname);
827
828 return 0;
829
830 err_option_port_add:
831 netdev_rx_handler_unregister(port_dev);
832
833 err_handler_register:
834 netdev_set_master(port_dev, NULL);
835
836 err_set_master:
837 vlan_vids_del_by_dev(port_dev, dev);
838
839 err_vids_add:
840 dev_close(port_dev);
841
842 err_dev_open:
843 team_port_leave(team, port);
844 team_port_set_orig_mac(port);
845
846 err_port_enter:
847 dev_set_mtu(port_dev, port->orig.mtu);
848
849 err_set_mtu:
850 kfree(port);
851
852 return err;
853 }
854
855 static int team_port_del(struct team *team, struct net_device *port_dev)
856 {
857 struct net_device *dev = team->dev;
858 struct team_port *port;
859 char *portname = port_dev->name;
860
861 port = team_port_get_rtnl(port_dev);
862 if (!port || !team_port_find(team, port)) {
863 netdev_err(dev, "Device %s does not act as a port of this team\n",
864 portname);
865 return -ENOENT;
866 }
867
868 port->removed = true;
869 __team_port_change_check(port, false);
870 team_port_disable(team, port);
871 list_del_rcu(&port->list);
872 team_adjust_ops(team);
873 team_option_port_del(team, port);
874 netdev_rx_handler_unregister(port_dev);
875 netdev_set_master(port_dev, NULL);
876 vlan_vids_del_by_dev(port_dev, dev);
877 dev_close(port_dev);
878 team_port_leave(team, port);
879 team_port_set_orig_mac(port);
880 dev_set_mtu(port_dev, port->orig.mtu);
881 synchronize_rcu();
882 kfree(port);
883 netdev_info(dev, "Port device %s removed\n", portname);
884 __team_compute_features(team);
885
886 return 0;
887 }
888
889
890 /*****************
891 * Net device ops
892 *****************/
893
894 static const char team_no_mode_kind[] = "*NOMODE*";
895
896 static int team_mode_option_get(struct team *team, struct team_gsetter_ctx *ctx)
897 {
898 ctx->data.str_val = team->mode ? team->mode->kind : team_no_mode_kind;
899 return 0;
900 }
901
902 static int team_mode_option_set(struct team *team, struct team_gsetter_ctx *ctx)
903 {
904 return team_change_mode(team, ctx->data.str_val);
905 }
906
907 static int team_port_en_option_get(struct team *team,
908 struct team_gsetter_ctx *ctx)
909 {
910 ctx->data.bool_val = team_port_enabled(ctx->port);
911 return 0;
912 }
913
914 static int team_port_en_option_set(struct team *team,
915 struct team_gsetter_ctx *ctx)
916 {
917 if (ctx->data.bool_val)
918 team_port_enable(team, ctx->port);
919 else
920 team_port_disable(team, ctx->port);
921 return 0;
922 }
923
924 static int team_user_linkup_option_get(struct team *team,
925 struct team_gsetter_ctx *ctx)
926 {
927 ctx->data.bool_val = ctx->port->user.linkup;
928 return 0;
929 }
930
931 static int team_user_linkup_option_set(struct team *team,
932 struct team_gsetter_ctx *ctx)
933 {
934 ctx->port->user.linkup = ctx->data.bool_val;
935 team_refresh_port_linkup(ctx->port);
936 return 0;
937 }
938
939 static int team_user_linkup_en_option_get(struct team *team,
940 struct team_gsetter_ctx *ctx)
941 {
942 struct team_port *port = ctx->port;
943
944 ctx->data.bool_val = port->user.linkup_enabled;
945 return 0;
946 }
947
948 static int team_user_linkup_en_option_set(struct team *team,
949 struct team_gsetter_ctx *ctx)
950 {
951 struct team_port *port = ctx->port;
952
953 port->user.linkup_enabled = ctx->data.bool_val;
954 team_refresh_port_linkup(ctx->port);
955 return 0;
956 }
957
958 static const struct team_option team_options[] = {
959 {
960 .name = "mode",
961 .type = TEAM_OPTION_TYPE_STRING,
962 .getter = team_mode_option_get,
963 .setter = team_mode_option_set,
964 },
965 {
966 .name = "enabled",
967 .type = TEAM_OPTION_TYPE_BOOL,
968 .per_port = true,
969 .getter = team_port_en_option_get,
970 .setter = team_port_en_option_set,
971 },
972 {
973 .name = "user_linkup",
974 .type = TEAM_OPTION_TYPE_BOOL,
975 .per_port = true,
976 .getter = team_user_linkup_option_get,
977 .setter = team_user_linkup_option_set,
978 },
979 {
980 .name = "user_linkup_enabled",
981 .type = TEAM_OPTION_TYPE_BOOL,
982 .per_port = true,
983 .getter = team_user_linkup_en_option_get,
984 .setter = team_user_linkup_en_option_set,
985 },
986 };
987
988 static int team_init(struct net_device *dev)
989 {
990 struct team *team = netdev_priv(dev);
991 int i;
992 int err;
993
994 team->dev = dev;
995 mutex_init(&team->lock);
996
997 team->pcpu_stats = alloc_percpu(struct team_pcpu_stats);
998 if (!team->pcpu_stats)
999 return -ENOMEM;
1000
1001 for (i = 0; i < TEAM_PORT_HASHENTRIES; i++)
1002 INIT_HLIST_HEAD(&team->en_port_hlist[i]);
1003 INIT_LIST_HEAD(&team->port_list);
1004
1005 team_adjust_ops(team);
1006
1007 INIT_LIST_HEAD(&team->option_list);
1008 INIT_LIST_HEAD(&team->option_inst_list);
1009 err = team_options_register(team, team_options, ARRAY_SIZE(team_options));
1010 if (err)
1011 goto err_options_register;
1012 netif_carrier_off(dev);
1013
1014 return 0;
1015
1016 err_options_register:
1017 free_percpu(team->pcpu_stats);
1018
1019 return err;
1020 }
1021
1022 static void team_uninit(struct net_device *dev)
1023 {
1024 struct team *team = netdev_priv(dev);
1025 struct team_port *port;
1026 struct team_port *tmp;
1027
1028 mutex_lock(&team->lock);
1029 list_for_each_entry_safe(port, tmp, &team->port_list, list)
1030 team_port_del(team, port->dev);
1031
1032 __team_change_mode(team, NULL); /* cleanup */
1033 __team_options_unregister(team, team_options, ARRAY_SIZE(team_options));
1034 mutex_unlock(&team->lock);
1035 }
1036
1037 static void team_destructor(struct net_device *dev)
1038 {
1039 struct team *team = netdev_priv(dev);
1040
1041 free_percpu(team->pcpu_stats);
1042 free_netdev(dev);
1043 }
1044
1045 static int team_open(struct net_device *dev)
1046 {
1047 netif_carrier_on(dev);
1048 return 0;
1049 }
1050
1051 static int team_close(struct net_device *dev)
1052 {
1053 netif_carrier_off(dev);
1054 return 0;
1055 }
1056
1057 /*
1058 * note: already called with rcu_read_lock
1059 */
1060 static netdev_tx_t team_xmit(struct sk_buff *skb, struct net_device *dev)
1061 {
1062 struct team *team = netdev_priv(dev);
1063 bool tx_success = false;
1064 unsigned int len = skb->len;
1065
1066 tx_success = team->ops.transmit(team, skb);
1067 if (tx_success) {
1068 struct team_pcpu_stats *pcpu_stats;
1069
1070 pcpu_stats = this_cpu_ptr(team->pcpu_stats);
1071 u64_stats_update_begin(&pcpu_stats->syncp);
1072 pcpu_stats->tx_packets++;
1073 pcpu_stats->tx_bytes += len;
1074 u64_stats_update_end(&pcpu_stats->syncp);
1075 } else {
1076 this_cpu_inc(team->pcpu_stats->tx_dropped);
1077 }
1078
1079 return NETDEV_TX_OK;
1080 }
1081
1082 static void team_change_rx_flags(struct net_device *dev, int change)
1083 {
1084 struct team *team = netdev_priv(dev);
1085 struct team_port *port;
1086 int inc;
1087
1088 rcu_read_lock();
1089 list_for_each_entry_rcu(port, &team->port_list, list) {
1090 if (change & IFF_PROMISC) {
1091 inc = dev->flags & IFF_PROMISC ? 1 : -1;
1092 dev_set_promiscuity(port->dev, inc);
1093 }
1094 if (change & IFF_ALLMULTI) {
1095 inc = dev->flags & IFF_ALLMULTI ? 1 : -1;
1096 dev_set_allmulti(port->dev, inc);
1097 }
1098 }
1099 rcu_read_unlock();
1100 }
1101
1102 static void team_set_rx_mode(struct net_device *dev)
1103 {
1104 struct team *team = netdev_priv(dev);
1105 struct team_port *port;
1106
1107 rcu_read_lock();
1108 list_for_each_entry_rcu(port, &team->port_list, list) {
1109 dev_uc_sync(port->dev, dev);
1110 dev_mc_sync(port->dev, dev);
1111 }
1112 rcu_read_unlock();
1113 }
1114
1115 static int team_set_mac_address(struct net_device *dev, void *p)
1116 {
1117 struct team *team = netdev_priv(dev);
1118 struct team_port *port;
1119 struct sockaddr *addr = p;
1120
1121 dev->addr_assign_type &= ~NET_ADDR_RANDOM;
1122 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
1123 rcu_read_lock();
1124 list_for_each_entry_rcu(port, &team->port_list, list)
1125 if (team->ops.port_change_mac)
1126 team->ops.port_change_mac(team, port);
1127 rcu_read_unlock();
1128 return 0;
1129 }
1130
1131 static int team_change_mtu(struct net_device *dev, int new_mtu)
1132 {
1133 struct team *team = netdev_priv(dev);
1134 struct team_port *port;
1135 int err;
1136
1137 /*
1138 * Alhough this is reader, it's guarded by team lock. It's not possible
1139 * to traverse list in reverse under rcu_read_lock
1140 */
1141 mutex_lock(&team->lock);
1142 list_for_each_entry(port, &team->port_list, list) {
1143 err = dev_set_mtu(port->dev, new_mtu);
1144 if (err) {
1145 netdev_err(dev, "Device %s failed to change mtu",
1146 port->dev->name);
1147 goto unwind;
1148 }
1149 }
1150 mutex_unlock(&team->lock);
1151
1152 dev->mtu = new_mtu;
1153
1154 return 0;
1155
1156 unwind:
1157 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1158 dev_set_mtu(port->dev, dev->mtu);
1159 mutex_unlock(&team->lock);
1160
1161 return err;
1162 }
1163
1164 static struct rtnl_link_stats64 *
1165 team_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1166 {
1167 struct team *team = netdev_priv(dev);
1168 struct team_pcpu_stats *p;
1169 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
1170 u32 rx_dropped = 0, tx_dropped = 0;
1171 unsigned int start;
1172 int i;
1173
1174 for_each_possible_cpu(i) {
1175 p = per_cpu_ptr(team->pcpu_stats, i);
1176 do {
1177 start = u64_stats_fetch_begin_bh(&p->syncp);
1178 rx_packets = p->rx_packets;
1179 rx_bytes = p->rx_bytes;
1180 rx_multicast = p->rx_multicast;
1181 tx_packets = p->tx_packets;
1182 tx_bytes = p->tx_bytes;
1183 } while (u64_stats_fetch_retry_bh(&p->syncp, start));
1184
1185 stats->rx_packets += rx_packets;
1186 stats->rx_bytes += rx_bytes;
1187 stats->multicast += rx_multicast;
1188 stats->tx_packets += tx_packets;
1189 stats->tx_bytes += tx_bytes;
1190 /*
1191 * rx_dropped & tx_dropped are u32, updated
1192 * without syncp protection.
1193 */
1194 rx_dropped += p->rx_dropped;
1195 tx_dropped += p->tx_dropped;
1196 }
1197 stats->rx_dropped = rx_dropped;
1198 stats->tx_dropped = tx_dropped;
1199 return stats;
1200 }
1201
1202 static int team_vlan_rx_add_vid(struct net_device *dev, uint16_t vid)
1203 {
1204 struct team *team = netdev_priv(dev);
1205 struct team_port *port;
1206 int err;
1207
1208 /*
1209 * Alhough this is reader, it's guarded by team lock. It's not possible
1210 * to traverse list in reverse under rcu_read_lock
1211 */
1212 mutex_lock(&team->lock);
1213 list_for_each_entry(port, &team->port_list, list) {
1214 err = vlan_vid_add(port->dev, vid);
1215 if (err)
1216 goto unwind;
1217 }
1218 mutex_unlock(&team->lock);
1219
1220 return 0;
1221
1222 unwind:
1223 list_for_each_entry_continue_reverse(port, &team->port_list, list)
1224 vlan_vid_del(port->dev, vid);
1225 mutex_unlock(&team->lock);
1226
1227 return err;
1228 }
1229
1230 static int team_vlan_rx_kill_vid(struct net_device *dev, uint16_t vid)
1231 {
1232 struct team *team = netdev_priv(dev);
1233 struct team_port *port;
1234
1235 rcu_read_lock();
1236 list_for_each_entry_rcu(port, &team->port_list, list)
1237 vlan_vid_del(port->dev, vid);
1238 rcu_read_unlock();
1239
1240 return 0;
1241 }
1242
1243 static int team_add_slave(struct net_device *dev, struct net_device *port_dev)
1244 {
1245 struct team *team = netdev_priv(dev);
1246 int err;
1247
1248 mutex_lock(&team->lock);
1249 err = team_port_add(team, port_dev);
1250 mutex_unlock(&team->lock);
1251 return err;
1252 }
1253
1254 static int team_del_slave(struct net_device *dev, struct net_device *port_dev)
1255 {
1256 struct team *team = netdev_priv(dev);
1257 int err;
1258
1259 mutex_lock(&team->lock);
1260 err = team_port_del(team, port_dev);
1261 mutex_unlock(&team->lock);
1262 return err;
1263 }
1264
1265 static netdev_features_t team_fix_features(struct net_device *dev,
1266 netdev_features_t features)
1267 {
1268 struct team_port *port;
1269 struct team *team = netdev_priv(dev);
1270 netdev_features_t mask;
1271
1272 mask = features;
1273 features &= ~NETIF_F_ONE_FOR_ALL;
1274 features |= NETIF_F_ALL_FOR_ALL;
1275
1276 rcu_read_lock();
1277 list_for_each_entry_rcu(port, &team->port_list, list) {
1278 features = netdev_increment_features(features,
1279 port->dev->features,
1280 mask);
1281 }
1282 rcu_read_unlock();
1283 return features;
1284 }
1285
1286 static const struct net_device_ops team_netdev_ops = {
1287 .ndo_init = team_init,
1288 .ndo_uninit = team_uninit,
1289 .ndo_open = team_open,
1290 .ndo_stop = team_close,
1291 .ndo_start_xmit = team_xmit,
1292 .ndo_change_rx_flags = team_change_rx_flags,
1293 .ndo_set_rx_mode = team_set_rx_mode,
1294 .ndo_set_mac_address = team_set_mac_address,
1295 .ndo_change_mtu = team_change_mtu,
1296 .ndo_get_stats64 = team_get_stats64,
1297 .ndo_vlan_rx_add_vid = team_vlan_rx_add_vid,
1298 .ndo_vlan_rx_kill_vid = team_vlan_rx_kill_vid,
1299 .ndo_add_slave = team_add_slave,
1300 .ndo_del_slave = team_del_slave,
1301 .ndo_fix_features = team_fix_features,
1302 };
1303
1304
1305 /***********************
1306 * rt netlink interface
1307 ***********************/
1308
1309 static void team_setup(struct net_device *dev)
1310 {
1311 ether_setup(dev);
1312
1313 dev->netdev_ops = &team_netdev_ops;
1314 dev->destructor = team_destructor;
1315 dev->tx_queue_len = 0;
1316 dev->flags |= IFF_MULTICAST;
1317 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
1318
1319 /*
1320 * Indicate we support unicast address filtering. That way core won't
1321 * bring us to promisc mode in case a unicast addr is added.
1322 * Let this up to underlay drivers.
1323 */
1324 dev->priv_flags |= IFF_UNICAST_FLT;
1325
1326 dev->features |= NETIF_F_LLTX;
1327 dev->features |= NETIF_F_GRO;
1328 dev->hw_features = NETIF_F_HW_VLAN_TX |
1329 NETIF_F_HW_VLAN_RX |
1330 NETIF_F_HW_VLAN_FILTER;
1331
1332 dev->features |= dev->hw_features;
1333 }
1334
1335 static int team_newlink(struct net *src_net, struct net_device *dev,
1336 struct nlattr *tb[], struct nlattr *data[])
1337 {
1338 int err;
1339
1340 if (tb[IFLA_ADDRESS] == NULL)
1341 eth_hw_addr_random(dev);
1342
1343 err = register_netdevice(dev);
1344 if (err)
1345 return err;
1346
1347 return 0;
1348 }
1349
1350 static int team_validate(struct nlattr *tb[], struct nlattr *data[])
1351 {
1352 if (tb[IFLA_ADDRESS]) {
1353 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
1354 return -EINVAL;
1355 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
1356 return -EADDRNOTAVAIL;
1357 }
1358 return 0;
1359 }
1360
1361 static struct rtnl_link_ops team_link_ops __read_mostly = {
1362 .kind = DRV_NAME,
1363 .priv_size = sizeof(struct team),
1364 .setup = team_setup,
1365 .newlink = team_newlink,
1366 .validate = team_validate,
1367 };
1368
1369
1370 /***********************************
1371 * Generic netlink custom interface
1372 ***********************************/
1373
1374 static struct genl_family team_nl_family = {
1375 .id = GENL_ID_GENERATE,
1376 .name = TEAM_GENL_NAME,
1377 .version = TEAM_GENL_VERSION,
1378 .maxattr = TEAM_ATTR_MAX,
1379 .netnsok = true,
1380 };
1381
1382 static const struct nla_policy team_nl_policy[TEAM_ATTR_MAX + 1] = {
1383 [TEAM_ATTR_UNSPEC] = { .type = NLA_UNSPEC, },
1384 [TEAM_ATTR_TEAM_IFINDEX] = { .type = NLA_U32 },
1385 [TEAM_ATTR_LIST_OPTION] = { .type = NLA_NESTED },
1386 [TEAM_ATTR_LIST_PORT] = { .type = NLA_NESTED },
1387 };
1388
1389 static const struct nla_policy
1390 team_nl_option_policy[TEAM_ATTR_OPTION_MAX + 1] = {
1391 [TEAM_ATTR_OPTION_UNSPEC] = { .type = NLA_UNSPEC, },
1392 [TEAM_ATTR_OPTION_NAME] = {
1393 .type = NLA_STRING,
1394 .len = TEAM_STRING_MAX_LEN,
1395 },
1396 [TEAM_ATTR_OPTION_CHANGED] = { .type = NLA_FLAG },
1397 [TEAM_ATTR_OPTION_TYPE] = { .type = NLA_U8 },
1398 [TEAM_ATTR_OPTION_DATA] = { .type = NLA_BINARY },
1399 };
1400
1401 static int team_nl_cmd_noop(struct sk_buff *skb, struct genl_info *info)
1402 {
1403 struct sk_buff *msg;
1404 void *hdr;
1405 int err;
1406
1407 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1408 if (!msg)
1409 return -ENOMEM;
1410
1411 hdr = genlmsg_put(msg, info->snd_pid, info->snd_seq,
1412 &team_nl_family, 0, TEAM_CMD_NOOP);
1413 if (IS_ERR(hdr)) {
1414 err = PTR_ERR(hdr);
1415 goto err_msg_put;
1416 }
1417
1418 genlmsg_end(msg, hdr);
1419
1420 return genlmsg_unicast(genl_info_net(info), msg, info->snd_pid);
1421
1422 err_msg_put:
1423 nlmsg_free(msg);
1424
1425 return err;
1426 }
1427
1428 /*
1429 * Netlink cmd functions should be locked by following two functions.
1430 * Since dev gets held here, that ensures dev won't disappear in between.
1431 */
1432 static struct team *team_nl_team_get(struct genl_info *info)
1433 {
1434 struct net *net = genl_info_net(info);
1435 int ifindex;
1436 struct net_device *dev;
1437 struct team *team;
1438
1439 if (!info->attrs[TEAM_ATTR_TEAM_IFINDEX])
1440 return NULL;
1441
1442 ifindex = nla_get_u32(info->attrs[TEAM_ATTR_TEAM_IFINDEX]);
1443 dev = dev_get_by_index(net, ifindex);
1444 if (!dev || dev->netdev_ops != &team_netdev_ops) {
1445 if (dev)
1446 dev_put(dev);
1447 return NULL;
1448 }
1449
1450 team = netdev_priv(dev);
1451 mutex_lock(&team->lock);
1452 return team;
1453 }
1454
1455 static void team_nl_team_put(struct team *team)
1456 {
1457 mutex_unlock(&team->lock);
1458 dev_put(team->dev);
1459 }
1460
1461 static int team_nl_send_generic(struct genl_info *info, struct team *team,
1462 int (*fill_func)(struct sk_buff *skb,
1463 struct genl_info *info,
1464 int flags, struct team *team))
1465 {
1466 struct sk_buff *skb;
1467 int err;
1468
1469 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1470 if (!skb)
1471 return -ENOMEM;
1472
1473 err = fill_func(skb, info, NLM_F_ACK, team);
1474 if (err < 0)
1475 goto err_fill;
1476
1477 err = genlmsg_unicast(genl_info_net(info), skb, info->snd_pid);
1478 return err;
1479
1480 err_fill:
1481 nlmsg_free(skb);
1482 return err;
1483 }
1484
1485 static int team_nl_fill_options_get(struct sk_buff *skb,
1486 u32 pid, u32 seq, int flags,
1487 struct team *team, bool fillall)
1488 {
1489 struct nlattr *option_list;
1490 void *hdr;
1491 struct team_option_inst *opt_inst;
1492 int err;
1493
1494 hdr = genlmsg_put(skb, pid, seq, &team_nl_family, flags,
1495 TEAM_CMD_OPTIONS_GET);
1496 if (IS_ERR(hdr))
1497 return PTR_ERR(hdr);
1498
1499 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
1500 goto nla_put_failure;
1501 option_list = nla_nest_start(skb, TEAM_ATTR_LIST_OPTION);
1502 if (!option_list)
1503 return -EMSGSIZE;
1504
1505 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
1506 struct nlattr *option_item;
1507 struct team_option *option = opt_inst->option;
1508 struct team_gsetter_ctx ctx;
1509
1510 /* Include only changed options if fill all mode is not on */
1511 if (!fillall && !opt_inst->changed)
1512 continue;
1513 option_item = nla_nest_start(skb, TEAM_ATTR_ITEM_OPTION);
1514 if (!option_item)
1515 goto nla_put_failure;
1516 if (nla_put_string(skb, TEAM_ATTR_OPTION_NAME, option->name))
1517 goto nla_put_failure;
1518 if (opt_inst->changed) {
1519 if (nla_put_flag(skb, TEAM_ATTR_OPTION_CHANGED))
1520 goto nla_put_failure;
1521 opt_inst->changed = false;
1522 }
1523 if (opt_inst->removed &&
1524 nla_put_flag(skb, TEAM_ATTR_OPTION_REMOVED))
1525 goto nla_put_failure;
1526 if (opt_inst->port &&
1527 nla_put_u32(skb, TEAM_ATTR_OPTION_PORT_IFINDEX,
1528 opt_inst->port->dev->ifindex))
1529 goto nla_put_failure;
1530 ctx.port = opt_inst->port;
1531 switch (option->type) {
1532 case TEAM_OPTION_TYPE_U32:
1533 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_U32))
1534 goto nla_put_failure;
1535 err = team_option_get(team, opt_inst, &ctx);
1536 if (err)
1537 goto errout;
1538 if (nla_put_u32(skb, TEAM_ATTR_OPTION_DATA,
1539 ctx.data.u32_val))
1540 goto nla_put_failure;
1541 break;
1542 case TEAM_OPTION_TYPE_STRING:
1543 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_STRING))
1544 goto nla_put_failure;
1545 err = team_option_get(team, opt_inst, &ctx);
1546 if (err)
1547 goto errout;
1548 if (nla_put_string(skb, TEAM_ATTR_OPTION_DATA,
1549 ctx.data.str_val))
1550 goto nla_put_failure;
1551 break;
1552 case TEAM_OPTION_TYPE_BINARY:
1553 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_BINARY))
1554 goto nla_put_failure;
1555 err = team_option_get(team, opt_inst, &ctx);
1556 if (err)
1557 goto errout;
1558 if (nla_put(skb, TEAM_ATTR_OPTION_DATA,
1559 ctx.data.bin_val.len, ctx.data.bin_val.ptr))
1560 goto nla_put_failure;
1561 break;
1562 case TEAM_OPTION_TYPE_BOOL:
1563 if (nla_put_u8(skb, TEAM_ATTR_OPTION_TYPE, NLA_FLAG))
1564 goto nla_put_failure;
1565 err = team_option_get(team, opt_inst, &ctx);
1566 if (err)
1567 goto errout;
1568 if (ctx.data.bool_val &&
1569 nla_put_flag(skb, TEAM_ATTR_OPTION_DATA))
1570 goto nla_put_failure;
1571 break;
1572 default:
1573 BUG();
1574 }
1575 nla_nest_end(skb, option_item);
1576 }
1577
1578 nla_nest_end(skb, option_list);
1579 return genlmsg_end(skb, hdr);
1580
1581 nla_put_failure:
1582 err = -EMSGSIZE;
1583 errout:
1584 genlmsg_cancel(skb, hdr);
1585 return err;
1586 }
1587
1588 static int team_nl_fill_options_get_all(struct sk_buff *skb,
1589 struct genl_info *info, int flags,
1590 struct team *team)
1591 {
1592 return team_nl_fill_options_get(skb, info->snd_pid,
1593 info->snd_seq, NLM_F_ACK,
1594 team, true);
1595 }
1596
1597 static int team_nl_cmd_options_get(struct sk_buff *skb, struct genl_info *info)
1598 {
1599 struct team *team;
1600 int err;
1601
1602 team = team_nl_team_get(info);
1603 if (!team)
1604 return -EINVAL;
1605
1606 err = team_nl_send_generic(info, team, team_nl_fill_options_get_all);
1607
1608 team_nl_team_put(team);
1609
1610 return err;
1611 }
1612
1613 static int team_nl_cmd_options_set(struct sk_buff *skb, struct genl_info *info)
1614 {
1615 struct team *team;
1616 int err = 0;
1617 int i;
1618 struct nlattr *nl_option;
1619
1620 team = team_nl_team_get(info);
1621 if (!team)
1622 return -EINVAL;
1623
1624 err = -EINVAL;
1625 if (!info->attrs[TEAM_ATTR_LIST_OPTION]) {
1626 err = -EINVAL;
1627 goto team_put;
1628 }
1629
1630 nla_for_each_nested(nl_option, info->attrs[TEAM_ATTR_LIST_OPTION], i) {
1631 struct nlattr *opt_attrs[TEAM_ATTR_OPTION_MAX + 1];
1632 struct nlattr *attr_port_ifindex;
1633 struct nlattr *attr_data;
1634 enum team_option_type opt_type;
1635 int opt_port_ifindex = 0; /* != 0 for per-port options */
1636 struct team_option_inst *opt_inst;
1637 char *opt_name;
1638 bool opt_found = false;
1639
1640 if (nla_type(nl_option) != TEAM_ATTR_ITEM_OPTION) {
1641 err = -EINVAL;
1642 goto team_put;
1643 }
1644 err = nla_parse_nested(opt_attrs, TEAM_ATTR_OPTION_MAX,
1645 nl_option, team_nl_option_policy);
1646 if (err)
1647 goto team_put;
1648 if (!opt_attrs[TEAM_ATTR_OPTION_NAME] ||
1649 !opt_attrs[TEAM_ATTR_OPTION_TYPE]) {
1650 err = -EINVAL;
1651 goto team_put;
1652 }
1653 switch (nla_get_u8(opt_attrs[TEAM_ATTR_OPTION_TYPE])) {
1654 case NLA_U32:
1655 opt_type = TEAM_OPTION_TYPE_U32;
1656 break;
1657 case NLA_STRING:
1658 opt_type = TEAM_OPTION_TYPE_STRING;
1659 break;
1660 case NLA_BINARY:
1661 opt_type = TEAM_OPTION_TYPE_BINARY;
1662 break;
1663 case NLA_FLAG:
1664 opt_type = TEAM_OPTION_TYPE_BOOL;
1665 break;
1666 default:
1667 goto team_put;
1668 }
1669
1670 attr_data = opt_attrs[TEAM_ATTR_OPTION_DATA];
1671 if (opt_type != TEAM_OPTION_TYPE_BOOL && !attr_data) {
1672 err = -EINVAL;
1673 goto team_put;
1674 }
1675
1676 opt_name = nla_data(opt_attrs[TEAM_ATTR_OPTION_NAME]);
1677 attr_port_ifindex = opt_attrs[TEAM_ATTR_OPTION_PORT_IFINDEX];
1678 if (attr_port_ifindex)
1679 opt_port_ifindex = nla_get_u32(attr_port_ifindex);
1680
1681 list_for_each_entry(opt_inst, &team->option_inst_list, list) {
1682 struct team_option *option = opt_inst->option;
1683 struct team_gsetter_ctx ctx;
1684 int tmp_ifindex;
1685
1686 tmp_ifindex = opt_inst->port ?
1687 opt_inst->port->dev->ifindex : 0;
1688 if (option->type != opt_type ||
1689 strcmp(option->name, opt_name) ||
1690 tmp_ifindex != opt_port_ifindex)
1691 continue;
1692 opt_found = true;
1693 ctx.port = opt_inst->port;
1694 switch (opt_type) {
1695 case TEAM_OPTION_TYPE_U32:
1696 ctx.data.u32_val = nla_get_u32(attr_data);
1697 break;
1698 case TEAM_OPTION_TYPE_STRING:
1699 if (nla_len(attr_data) > TEAM_STRING_MAX_LEN) {
1700 err = -EINVAL;
1701 goto team_put;
1702 }
1703 ctx.data.str_val = nla_data(attr_data);
1704 break;
1705 case TEAM_OPTION_TYPE_BINARY:
1706 ctx.data.bin_val.len = nla_len(attr_data);
1707 ctx.data.bin_val.ptr = nla_data(attr_data);
1708 break;
1709 case TEAM_OPTION_TYPE_BOOL:
1710 ctx.data.bool_val = attr_data ? true : false;
1711 break;
1712 default:
1713 BUG();
1714 }
1715 err = team_option_set(team, opt_inst, &ctx);
1716 if (err)
1717 goto team_put;
1718 }
1719 if (!opt_found) {
1720 err = -ENOENT;
1721 goto team_put;
1722 }
1723 }
1724
1725 team_put:
1726 team_nl_team_put(team);
1727
1728 return err;
1729 }
1730
1731 static int team_nl_fill_port_list_get(struct sk_buff *skb,
1732 u32 pid, u32 seq, int flags,
1733 struct team *team,
1734 bool fillall)
1735 {
1736 struct nlattr *port_list;
1737 void *hdr;
1738 struct team_port *port;
1739
1740 hdr = genlmsg_put(skb, pid, seq, &team_nl_family, flags,
1741 TEAM_CMD_PORT_LIST_GET);
1742 if (IS_ERR(hdr))
1743 return PTR_ERR(hdr);
1744
1745 if (nla_put_u32(skb, TEAM_ATTR_TEAM_IFINDEX, team->dev->ifindex))
1746 goto nla_put_failure;
1747 port_list = nla_nest_start(skb, TEAM_ATTR_LIST_PORT);
1748 if (!port_list)
1749 return -EMSGSIZE;
1750
1751 list_for_each_entry(port, &team->port_list, list) {
1752 struct nlattr *port_item;
1753
1754 /* Include only changed ports if fill all mode is not on */
1755 if (!fillall && !port->changed)
1756 continue;
1757 port_item = nla_nest_start(skb, TEAM_ATTR_ITEM_PORT);
1758 if (!port_item)
1759 goto nla_put_failure;
1760 if (nla_put_u32(skb, TEAM_ATTR_PORT_IFINDEX, port->dev->ifindex))
1761 goto nla_put_failure;
1762 if (port->changed) {
1763 if (nla_put_flag(skb, TEAM_ATTR_PORT_CHANGED))
1764 goto nla_put_failure;
1765 port->changed = false;
1766 }
1767 if ((port->removed &&
1768 nla_put_flag(skb, TEAM_ATTR_PORT_REMOVED)) ||
1769 (port->state.linkup &&
1770 nla_put_flag(skb, TEAM_ATTR_PORT_LINKUP)) ||
1771 nla_put_u32(skb, TEAM_ATTR_PORT_SPEED, port->state.speed) ||
1772 nla_put_u8(skb, TEAM_ATTR_PORT_DUPLEX, port->state.duplex))
1773 goto nla_put_failure;
1774 nla_nest_end(skb, port_item);
1775 }
1776
1777 nla_nest_end(skb, port_list);
1778 return genlmsg_end(skb, hdr);
1779
1780 nla_put_failure:
1781 genlmsg_cancel(skb, hdr);
1782 return -EMSGSIZE;
1783 }
1784
1785 static int team_nl_fill_port_list_get_all(struct sk_buff *skb,
1786 struct genl_info *info, int flags,
1787 struct team *team)
1788 {
1789 return team_nl_fill_port_list_get(skb, info->snd_pid,
1790 info->snd_seq, NLM_F_ACK,
1791 team, true);
1792 }
1793
1794 static int team_nl_cmd_port_list_get(struct sk_buff *skb,
1795 struct genl_info *info)
1796 {
1797 struct team *team;
1798 int err;
1799
1800 team = team_nl_team_get(info);
1801 if (!team)
1802 return -EINVAL;
1803
1804 err = team_nl_send_generic(info, team, team_nl_fill_port_list_get_all);
1805
1806 team_nl_team_put(team);
1807
1808 return err;
1809 }
1810
1811 static struct genl_ops team_nl_ops[] = {
1812 {
1813 .cmd = TEAM_CMD_NOOP,
1814 .doit = team_nl_cmd_noop,
1815 .policy = team_nl_policy,
1816 },
1817 {
1818 .cmd = TEAM_CMD_OPTIONS_SET,
1819 .doit = team_nl_cmd_options_set,
1820 .policy = team_nl_policy,
1821 .flags = GENL_ADMIN_PERM,
1822 },
1823 {
1824 .cmd = TEAM_CMD_OPTIONS_GET,
1825 .doit = team_nl_cmd_options_get,
1826 .policy = team_nl_policy,
1827 .flags = GENL_ADMIN_PERM,
1828 },
1829 {
1830 .cmd = TEAM_CMD_PORT_LIST_GET,
1831 .doit = team_nl_cmd_port_list_get,
1832 .policy = team_nl_policy,
1833 .flags = GENL_ADMIN_PERM,
1834 },
1835 };
1836
1837 static struct genl_multicast_group team_change_event_mcgrp = {
1838 .name = TEAM_GENL_CHANGE_EVENT_MC_GRP_NAME,
1839 };
1840
1841 static int team_nl_send_event_options_get(struct team *team)
1842 {
1843 struct sk_buff *skb;
1844 int err;
1845 struct net *net = dev_net(team->dev);
1846
1847 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1848 if (!skb)
1849 return -ENOMEM;
1850
1851 err = team_nl_fill_options_get(skb, 0, 0, 0, team, false);
1852 if (err < 0)
1853 goto err_fill;
1854
1855 err = genlmsg_multicast_netns(net, skb, 0, team_change_event_mcgrp.id,
1856 GFP_KERNEL);
1857 return err;
1858
1859 err_fill:
1860 nlmsg_free(skb);
1861 return err;
1862 }
1863
1864 static int team_nl_send_event_port_list_get(struct team *team)
1865 {
1866 struct sk_buff *skb;
1867 int err;
1868 struct net *net = dev_net(team->dev);
1869
1870 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1871 if (!skb)
1872 return -ENOMEM;
1873
1874 err = team_nl_fill_port_list_get(skb, 0, 0, 0, team, false);
1875 if (err < 0)
1876 goto err_fill;
1877
1878 err = genlmsg_multicast_netns(net, skb, 0, team_change_event_mcgrp.id,
1879 GFP_KERNEL);
1880 return err;
1881
1882 err_fill:
1883 nlmsg_free(skb);
1884 return err;
1885 }
1886
1887 static int team_nl_init(void)
1888 {
1889 int err;
1890
1891 err = genl_register_family_with_ops(&team_nl_family, team_nl_ops,
1892 ARRAY_SIZE(team_nl_ops));
1893 if (err)
1894 return err;
1895
1896 err = genl_register_mc_group(&team_nl_family, &team_change_event_mcgrp);
1897 if (err)
1898 goto err_change_event_grp_reg;
1899
1900 return 0;
1901
1902 err_change_event_grp_reg:
1903 genl_unregister_family(&team_nl_family);
1904
1905 return err;
1906 }
1907
1908 static void team_nl_fini(void)
1909 {
1910 genl_unregister_family(&team_nl_family);
1911 }
1912
1913
1914 /******************
1915 * Change checkers
1916 ******************/
1917
1918 static void __team_options_change_check(struct team *team)
1919 {
1920 int err;
1921
1922 err = team_nl_send_event_options_get(team);
1923 if (err)
1924 netdev_warn(team->dev, "Failed to send options change via netlink\n");
1925 }
1926
1927 /* rtnl lock is held */
1928 static void __team_port_change_check(struct team_port *port, bool linkup)
1929 {
1930 int err;
1931
1932 if (!port->removed && port->state.linkup == linkup)
1933 return;
1934
1935 port->changed = true;
1936 port->state.linkup = linkup;
1937 team_refresh_port_linkup(port);
1938 if (linkup) {
1939 struct ethtool_cmd ecmd;
1940
1941 err = __ethtool_get_settings(port->dev, &ecmd);
1942 if (!err) {
1943 port->state.speed = ethtool_cmd_speed(&ecmd);
1944 port->state.duplex = ecmd.duplex;
1945 goto send_event;
1946 }
1947 }
1948 port->state.speed = 0;
1949 port->state.duplex = 0;
1950
1951 send_event:
1952 err = team_nl_send_event_port_list_get(port->team);
1953 if (err)
1954 netdev_warn(port->team->dev, "Failed to send port change of device %s via netlink\n",
1955 port->dev->name);
1956
1957 }
1958
1959 static void team_port_change_check(struct team_port *port, bool linkup)
1960 {
1961 struct team *team = port->team;
1962
1963 mutex_lock(&team->lock);
1964 __team_port_change_check(port, linkup);
1965 mutex_unlock(&team->lock);
1966 }
1967
1968 /************************************
1969 * Net device notifier event handler
1970 ************************************/
1971
1972 static int team_device_event(struct notifier_block *unused,
1973 unsigned long event, void *ptr)
1974 {
1975 struct net_device *dev = (struct net_device *) ptr;
1976 struct team_port *port;
1977
1978 port = team_port_get_rtnl(dev);
1979 if (!port)
1980 return NOTIFY_DONE;
1981
1982 switch (event) {
1983 case NETDEV_UP:
1984 if (netif_carrier_ok(dev))
1985 team_port_change_check(port, true);
1986 case NETDEV_DOWN:
1987 team_port_change_check(port, false);
1988 case NETDEV_CHANGE:
1989 if (netif_running(port->dev))
1990 team_port_change_check(port,
1991 !!netif_carrier_ok(port->dev));
1992 break;
1993 case NETDEV_UNREGISTER:
1994 team_del_slave(port->team->dev, dev);
1995 break;
1996 case NETDEV_FEAT_CHANGE:
1997 team_compute_features(port->team);
1998 break;
1999 case NETDEV_CHANGEMTU:
2000 /* Forbid to change mtu of underlaying device */
2001 return NOTIFY_BAD;
2002 case NETDEV_PRE_TYPE_CHANGE:
2003 /* Forbid to change type of underlaying device */
2004 return NOTIFY_BAD;
2005 }
2006 return NOTIFY_DONE;
2007 }
2008
2009 static struct notifier_block team_notifier_block __read_mostly = {
2010 .notifier_call = team_device_event,
2011 };
2012
2013
2014 /***********************
2015 * Module init and exit
2016 ***********************/
2017
2018 static int __init team_module_init(void)
2019 {
2020 int err;
2021
2022 register_netdevice_notifier(&team_notifier_block);
2023
2024 err = rtnl_link_register(&team_link_ops);
2025 if (err)
2026 goto err_rtnl_reg;
2027
2028 err = team_nl_init();
2029 if (err)
2030 goto err_nl_init;
2031
2032 return 0;
2033
2034 err_nl_init:
2035 rtnl_link_unregister(&team_link_ops);
2036
2037 err_rtnl_reg:
2038 unregister_netdevice_notifier(&team_notifier_block);
2039
2040 return err;
2041 }
2042
2043 static void __exit team_module_exit(void)
2044 {
2045 team_nl_fini();
2046 rtnl_link_unregister(&team_link_ops);
2047 unregister_netdevice_notifier(&team_notifier_block);
2048 }
2049
2050 module_init(team_module_init);
2051 module_exit(team_module_exit);
2052
2053 MODULE_LICENSE("GPL v2");
2054 MODULE_AUTHOR("Jiri Pirko <jpirko@redhat.com>");
2055 MODULE_DESCRIPTION("Ethernet team device driver");
2056 MODULE_ALIAS_RTNL_LINK(DRV_NAME);
kernel source for telekom puls (alcatel/mediatek)