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1/*
2 * Copyright(c) 2004-2005 Intel Corporation. All rights reserved.
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License as published by the
6 * Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
11 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * for more details.
13 *
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, see <http://www.gnu.org/licenses/>.
16 *
17 * The full GNU General Public License is included in this distribution in the
18 * file called LICENSE.
19 *
20 */
21
22#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
23
24#include <linux/kernel.h>
25#include <linux/module.h>
26#include <linux/device.h>
27#include <linux/sched.h>
28#include <linux/fs.h>
29#include <linux/types.h>
30#include <linux/string.h>
31#include <linux/netdevice.h>
32#include <linux/inetdevice.h>
33#include <linux/in.h>
34#include <linux/sysfs.h>
35#include <linux/ctype.h>
36#include <linux/inet.h>
37#include <linux/rtnetlink.h>
38#include <linux/etherdevice.h>
39#include <net/net_namespace.h>
40#include <net/netns/generic.h>
41#include <linux/nsproxy.h>
42
43#include "bonding.h"
44
45#define to_dev(obj) container_of(obj, struct device, kobj)
46#define to_bond(cd) ((struct bonding *)(netdev_priv(to_net_dev(cd))))
47
48/*
49 * "show" function for the bond_masters attribute.
50 * The class parameter is ignored.
51 */
52static ssize_t bonding_show_bonds(struct class *cls,
53 struct class_attribute *attr,
54 char *buf)
55{
56 struct bond_net *bn =
57 container_of(attr, struct bond_net, class_attr_bonding_masters);
58 int res = 0;
59 struct bonding *bond;
60
61 rtnl_lock();
62
63 list_for_each_entry(bond, &bn->dev_list, bond_list) {
64 if (res > (PAGE_SIZE - IFNAMSIZ)) {
65 /* not enough space for another interface name */
66 if ((PAGE_SIZE - res) > 10)
67 res = PAGE_SIZE - 10;
68 res += sprintf(buf + res, "++more++ ");
69 break;
70 }
71 res += sprintf(buf + res, "%s ", bond->dev->name);
72 }
73 if (res)
74 buf[res-1] = '\n'; /* eat the leftover space */
75
76 rtnl_unlock();
77 return res;
78}
79
80static struct net_device *bond_get_by_name(struct bond_net *bn, const char *ifname)
81{
82 struct bonding *bond;
83
84 list_for_each_entry(bond, &bn->dev_list, bond_list) {
85 if (strncmp(bond->dev->name, ifname, IFNAMSIZ) == 0)
86 return bond->dev;
87 }
88 return NULL;
89}
90
91/*
92 * "store" function for the bond_masters attribute. This is what
93 * creates and deletes entire bonds.
94 *
95 * The class parameter is ignored.
96 *
97 */
98
99static ssize_t bonding_store_bonds(struct class *cls,
100 struct class_attribute *attr,
101 const char *buffer, size_t count)
102{
103 struct bond_net *bn =
104 container_of(attr, struct bond_net, class_attr_bonding_masters);
105 char command[IFNAMSIZ + 1] = {0, };
106 char *ifname;
107 int rv, res = count;
108
109 sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
110 ifname = command + 1;
111 if ((strlen(command) <= 1) ||
112 !dev_valid_name(ifname))
113 goto err_no_cmd;
114
115 if (command[0] == '+') {
116 pr_info("%s is being created...\n", ifname);
117 rv = bond_create(bn->net, ifname);
118 if (rv) {
119 if (rv == -EEXIST)
120 pr_info("%s already exists\n", ifname);
121 else
122 pr_info("%s creation failed\n", ifname);
123 res = rv;
124 }
125 } else if (command[0] == '-') {
126 struct net_device *bond_dev;
127
128 rtnl_lock();
129 bond_dev = bond_get_by_name(bn, ifname);
130 if (bond_dev) {
131 pr_info("%s is being deleted...\n", ifname);
132 unregister_netdevice(bond_dev);
133 } else {
134 pr_err("unable to delete non-existent %s\n", ifname);
135 res = -ENODEV;
136 }
137 rtnl_unlock();
138 } else
139 goto err_no_cmd;
140
141 /* Always return either count or an error. If you return 0, you'll
142 * get called forever, which is bad.
143 */
144 return res;
145
146err_no_cmd:
147 pr_err("no command found in bonding_masters - use +ifname or -ifname\n");
148 return -EPERM;
149}
150
151/* class attribute for bond_masters file. This ends up in /sys/class/net */
152static const struct class_attribute class_attr_bonding_masters = {
153 .attr = {
154 .name = "bonding_masters",
155 .mode = S_IWUSR | S_IRUGO,
156 },
157 .show = bonding_show_bonds,
158 .store = bonding_store_bonds,
159};
160
161/*
162 * Show the slaves in the current bond.
163 */
164static ssize_t bonding_show_slaves(struct device *d,
165 struct device_attribute *attr, char *buf)
166{
167 struct bonding *bond = to_bond(d);
168 struct list_head *iter;
169 struct slave *slave;
170 int res = 0;
171
172 if (!rtnl_trylock())
173 return restart_syscall();
174
175 bond_for_each_slave(bond, slave, iter) {
176 if (res > (PAGE_SIZE - IFNAMSIZ)) {
177 /* not enough space for another interface name */
178 if ((PAGE_SIZE - res) > 10)
179 res = PAGE_SIZE - 10;
180 res += sprintf(buf + res, "++more++ ");
181 break;
182 }
183 res += sprintf(buf + res, "%s ", slave->dev->name);
184 }
185
186 rtnl_unlock();
187
188 if (res)
189 buf[res-1] = '\n'; /* eat the leftover space */
190
191 return res;
192}
193
194/*
195 * Set the slaves in the current bond.
196 * This is supposed to be only thin wrapper for bond_enslave and bond_release.
197 * All hard work should be done there.
198 */
199static ssize_t bonding_store_slaves(struct device *d,
200 struct device_attribute *attr,
201 const char *buffer, size_t count)
202{
203 struct bonding *bond = to_bond(d);
204 int ret;
205
206 ret = bond_opt_tryset_rtnl(bond, BOND_OPT_SLAVES, (char *)buffer);
207 if (!ret)
208 ret = count;
209
210 return ret;
211}
212static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves,
213 bonding_store_slaves);
214
215/*
216 * Show and set the bonding mode. The bond interface must be down to
217 * change the mode.
218 */
219static ssize_t bonding_show_mode(struct device *d,
220 struct device_attribute *attr, char *buf)
221{
222 struct bonding *bond = to_bond(d);
223 const struct bond_opt_value *val;
224
225 val = bond_opt_get_val(BOND_OPT_MODE, bond->params.mode);
226
227 return sprintf(buf, "%s %d\n", val->string, bond->params.mode);
228}
229
230static ssize_t bonding_store_mode(struct device *d,
231 struct device_attribute *attr,
232 const char *buf, size_t count)
233{
234 struct bonding *bond = to_bond(d);
235 int ret;
236
237 ret = bond_opt_tryset_rtnl(bond, BOND_OPT_MODE, (char *)buf);
238 if (!ret)
239 ret = count;
240
241 return ret;
242}
243static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,
244 bonding_show_mode, bonding_store_mode);
245
246/*
247 * Show and set the bonding transmit hash method.
248 */
249static ssize_t bonding_show_xmit_hash(struct device *d,
250 struct device_attribute *attr,
251 char *buf)
252{
253 struct bonding *bond = to_bond(d);
254 const struct bond_opt_value *val;
255
256 val = bond_opt_get_val(BOND_OPT_XMIT_HASH, bond->params.xmit_policy);
257
258 return sprintf(buf, "%s %d\n", val->string, bond->params.xmit_policy);
259}
260
261static ssize_t bonding_store_xmit_hash(struct device *d,
262 struct device_attribute *attr,
263 const char *buf, size_t count)
264{
265 struct bonding *bond = to_bond(d);
266 int ret;
267
268 ret = bond_opt_tryset_rtnl(bond, BOND_OPT_XMIT_HASH, (char *)buf);
269 if (!ret)
270 ret = count;
271
272 return ret;
273}
274static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR,
275 bonding_show_xmit_hash, bonding_store_xmit_hash);
276
277/*
278 * Show and set arp_validate.
279 */
280static ssize_t bonding_show_arp_validate(struct device *d,
281 struct device_attribute *attr,
282 char *buf)
283{
284 struct bonding *bond = to_bond(d);
285 const struct bond_opt_value *val;
286
287 val = bond_opt_get_val(BOND_OPT_ARP_VALIDATE,
288 bond->params.arp_validate);
289
290 return sprintf(buf, "%s %d\n", val->string, bond->params.arp_validate);
291}
292
293static ssize_t bonding_store_arp_validate(struct device *d,
294 struct device_attribute *attr,
295 const char *buf, size_t count)
296{
297 struct bonding *bond = to_bond(d);
298 int ret;
299
300 ret = bond_opt_tryset_rtnl(bond, BOND_OPT_ARP_VALIDATE, (char *)buf);
301 if (!ret)
302 ret = count;
303
304 return ret;
305}
306
307static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate,
308 bonding_store_arp_validate);
309/*
310 * Show and set arp_all_targets.
311 */
312static ssize_t bonding_show_arp_all_targets(struct device *d,
313 struct device_attribute *attr,
314 char *buf)
315{
316 struct bonding *bond = to_bond(d);
317 const struct bond_opt_value *val;
318
319 val = bond_opt_get_val(BOND_OPT_ARP_ALL_TARGETS,
320 bond->params.arp_all_targets);
321 return sprintf(buf, "%s %d\n",
322 val->string, bond->params.arp_all_targets);
323}
324
325static ssize_t bonding_store_arp_all_targets(struct device *d,
326 struct device_attribute *attr,
327 const char *buf, size_t count)
328{
329 struct bonding *bond = to_bond(d);
330 int ret;
331
332 ret = bond_opt_tryset_rtnl(bond, BOND_OPT_ARP_ALL_TARGETS, (char *)buf);
333 if (!ret)
334 ret = count;
335
336 return ret;
337}
338
339static DEVICE_ATTR(arp_all_targets, S_IRUGO | S_IWUSR,
340 bonding_show_arp_all_targets, bonding_store_arp_all_targets);
341
342/*
343 * Show and store fail_over_mac. User only allowed to change the
344 * value when there are no slaves.
345 */
346static ssize_t bonding_show_fail_over_mac(struct device *d,
347 struct device_attribute *attr,
348 char *buf)
349{
350 struct bonding *bond = to_bond(d);
351 const struct bond_opt_value *val;
352
353 val = bond_opt_get_val(BOND_OPT_FAIL_OVER_MAC,
354 bond->params.fail_over_mac);
355
356 return sprintf(buf, "%s %d\n", val->string, bond->params.fail_over_mac);
357}
358
359static ssize_t bonding_store_fail_over_mac(struct device *d,
360 struct device_attribute *attr,
361 const char *buf, size_t count)
362{
363 struct bonding *bond = to_bond(d);
364 int ret;
365
366 ret = bond_opt_tryset_rtnl(bond, BOND_OPT_FAIL_OVER_MAC, (char *)buf);
367 if (!ret)
368 ret = count;
369
370 return ret;
371}
372
373static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR,
374 bonding_show_fail_over_mac, bonding_store_fail_over_mac);
375
376/*
377 * Show and set the arp timer interval. There are two tricky bits
378 * here. First, if ARP monitoring is activated, then we must disable
379 * MII monitoring. Second, if the ARP timer isn't running, we must
380 * start it.
381 */
382static ssize_t bonding_show_arp_interval(struct device *d,
383 struct device_attribute *attr,
384 char *buf)
385{
386 struct bonding *bond = to_bond(d);
387
388 return sprintf(buf, "%d\n", bond->params.arp_interval);
389}
390
391static ssize_t bonding_store_arp_interval(struct device *d,
392 struct device_attribute *attr,
393 const char *buf, size_t count)
394{
395 struct bonding *bond = to_bond(d);
396 int ret;
397
398 ret = bond_opt_tryset_rtnl(bond, BOND_OPT_ARP_INTERVAL, (char *)buf);
399 if (!ret)
400 ret = count;
401
402 return ret;
403}
404static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR,
405 bonding_show_arp_interval, bonding_store_arp_interval);
406
407/*
408 * Show and set the arp targets.
409 */
410static ssize_t bonding_show_arp_targets(struct device *d,
411 struct device_attribute *attr,
412 char *buf)
413{
414 struct bonding *bond = to_bond(d);
415 int i, res = 0;
416
417 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
418 if (bond->params.arp_targets[i])
419 res += sprintf(buf + res, "%pI4 ",
420 &bond->params.arp_targets[i]);
421 }
422 if (res)
423 buf[res-1] = '\n'; /* eat the leftover space */
424
425 return res;
426}
427
428static ssize_t bonding_store_arp_targets(struct device *d,
429 struct device_attribute *attr,
430 const char *buf, size_t count)
431{
432 struct bonding *bond = to_bond(d);
433 int ret;
434
435 ret = bond_opt_tryset_rtnl(bond, BOND_OPT_ARP_TARGETS, (char *)buf);
436 if (!ret)
437 ret = count;
438
439 return ret;
440}
441static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
442
443/*
444 * Show and set the up and down delays. These must be multiples of the
445 * MII monitoring value, and are stored internally as the multiplier.
446 * Thus, we must translate to MS for the real world.
447 */
448static ssize_t bonding_show_downdelay(struct device *d,
449 struct device_attribute *attr,
450 char *buf)
451{
452 struct bonding *bond = to_bond(d);
453
454 return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
455}
456
457static ssize_t bonding_store_downdelay(struct device *d,
458 struct device_attribute *attr,
459 const char *buf, size_t count)
460{
461 struct bonding *bond = to_bond(d);
462 int ret;
463
464 ret = bond_opt_tryset_rtnl(bond, BOND_OPT_DOWNDELAY, (char *)buf);
465 if (!ret)
466 ret = count;
467
468 return ret;
469}
470static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR,
471 bonding_show_downdelay, bonding_store_downdelay);
472
473static ssize_t bonding_show_updelay(struct device *d,
474 struct device_attribute *attr,
475 char *buf)
476{
477 struct bonding *bond = to_bond(d);
478
479 return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
480
481}
482
483static ssize_t bonding_store_updelay(struct device *d,
484 struct device_attribute *attr,
485 const char *buf, size_t count)
486{
487 struct bonding *bond = to_bond(d);
488 int ret;
489
490 ret = bond_opt_tryset_rtnl(bond, BOND_OPT_UPDELAY, (char *)buf);
491 if (!ret)
492 ret = count;
493
494 return ret;
495}
496static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR,
497 bonding_show_updelay, bonding_store_updelay);
498
499/*
500 * Show and set the LACP interval. Interface must be down, and the mode
501 * must be set to 802.3ad mode.
502 */
503static ssize_t bonding_show_lacp(struct device *d,
504 struct device_attribute *attr,
505 char *buf)
506{
507 struct bonding *bond = to_bond(d);
508 const struct bond_opt_value *val;
509
510 val = bond_opt_get_val(BOND_OPT_LACP_RATE, bond->params.lacp_fast);
511
512 return sprintf(buf, "%s %d\n", val->string, bond->params.lacp_fast);
513}
514
515static ssize_t bonding_store_lacp(struct device *d,
516 struct device_attribute *attr,
517 const char *buf, size_t count)
518{
519 struct bonding *bond = to_bond(d);
520 int ret;
521
522 ret = bond_opt_tryset_rtnl(bond, BOND_OPT_LACP_RATE, (char *)buf);
523 if (!ret)
524 ret = count;
525
526 return ret;
527}
528static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR,
529 bonding_show_lacp, bonding_store_lacp);
530
531static ssize_t bonding_show_min_links(struct device *d,
532 struct device_attribute *attr,
533 char *buf)
534{
535 struct bonding *bond = to_bond(d);
536
537 return sprintf(buf, "%u\n", bond->params.min_links);
538}
539
540static ssize_t bonding_store_min_links(struct device *d,
541 struct device_attribute *attr,
542 const char *buf, size_t count)
543{
544 struct bonding *bond = to_bond(d);
545 int ret;
546
547 ret = bond_opt_tryset_rtnl(bond, BOND_OPT_MINLINKS, (char *)buf);
548 if (!ret)
549 ret = count;
550
551 return ret;
552}
553static DEVICE_ATTR(min_links, S_IRUGO | S_IWUSR,
554 bonding_show_min_links, bonding_store_min_links);
555
556static ssize_t bonding_show_ad_select(struct device *d,
557 struct device_attribute *attr,
558 char *buf)
559{
560 struct bonding *bond = to_bond(d);
561 const struct bond_opt_value *val;
562
563 val = bond_opt_get_val(BOND_OPT_AD_SELECT, bond->params.ad_select);
564
565 return sprintf(buf, "%s %d\n", val->string, bond->params.ad_select);
566}
567
568
569static ssize_t bonding_store_ad_select(struct device *d,
570 struct device_attribute *attr,
571 const char *buf, size_t count)
572{
573 struct bonding *bond = to_bond(d);
574 int ret;
575
576 ret = bond_opt_tryset_rtnl(bond, BOND_OPT_AD_SELECT, (char *)buf);
577 if (!ret)
578 ret = count;
579
580 return ret;
581}
582static DEVICE_ATTR(ad_select, S_IRUGO | S_IWUSR,
583 bonding_show_ad_select, bonding_store_ad_select);
584
585/*
586 * Show and set the number of peer notifications to send after a failover event.
587 */
588static ssize_t bonding_show_num_peer_notif(struct device *d,
589 struct device_attribute *attr,
590 char *buf)
591{
592 struct bonding *bond = to_bond(d);
593 return sprintf(buf, "%d\n", bond->params.num_peer_notif);
594}
595
596static ssize_t bonding_store_num_peer_notif(struct device *d,
597 struct device_attribute *attr,
598 const char *buf, size_t count)
599{
600 struct bonding *bond = to_bond(d);
601 int ret;
602
603 ret = bond_opt_tryset_rtnl(bond, BOND_OPT_NUM_PEER_NOTIF, (char *)buf);
604 if (!ret)
605 ret = count;
606
607 return ret;
608}
609static DEVICE_ATTR(num_grat_arp, S_IRUGO | S_IWUSR,
610 bonding_show_num_peer_notif, bonding_store_num_peer_notif);
611static DEVICE_ATTR(num_unsol_na, S_IRUGO | S_IWUSR,
612 bonding_show_num_peer_notif, bonding_store_num_peer_notif);
613
614/*
615 * Show and set the MII monitor interval. There are two tricky bits
616 * here. First, if MII monitoring is activated, then we must disable
617 * ARP monitoring. Second, if the timer isn't running, we must
618 * start it.
619 */
620static ssize_t bonding_show_miimon(struct device *d,
621 struct device_attribute *attr,
622 char *buf)
623{
624 struct bonding *bond = to_bond(d);
625
626 return sprintf(buf, "%d\n", bond->params.miimon);
627}
628
629static ssize_t bonding_store_miimon(struct device *d,
630 struct device_attribute *attr,
631 const char *buf, size_t count)
632{
633 struct bonding *bond = to_bond(d);
634 int ret;
635
636 ret = bond_opt_tryset_rtnl(bond, BOND_OPT_MIIMON, (char *)buf);
637 if (!ret)
638 ret = count;
639
640 return ret;
641}
642static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR,
643 bonding_show_miimon, bonding_store_miimon);
644
645/*
646 * Show and set the primary slave. The store function is much
647 * simpler than bonding_store_slaves function because it only needs to
648 * handle one interface name.
649 * The bond must be a mode that supports a primary for this be
650 * set.
651 */
652static ssize_t bonding_show_primary(struct device *d,
653 struct device_attribute *attr,
654 char *buf)
655{
656 int count = 0;
657 struct bonding *bond = to_bond(d);
658
659 if (bond->primary_slave)
660 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);
661
662 return count;
663}
664
665static ssize_t bonding_store_primary(struct device *d,
666 struct device_attribute *attr,
667 const char *buf, size_t count)
668{
669 struct bonding *bond = to_bond(d);
670 int ret;
671
672 ret = bond_opt_tryset_rtnl(bond, BOND_OPT_PRIMARY, (char *)buf);
673 if (!ret)
674 ret = count;
675
676 return ret;
677}
678static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR,
679 bonding_show_primary, bonding_store_primary);
680
681/*
682 * Show and set the primary_reselect flag.
683 */
684static ssize_t bonding_show_primary_reselect(struct device *d,
685 struct device_attribute *attr,
686 char *buf)
687{
688 struct bonding *bond = to_bond(d);
689 const struct bond_opt_value *val;
690
691 val = bond_opt_get_val(BOND_OPT_PRIMARY_RESELECT,
692 bond->params.primary_reselect);
693
694 return sprintf(buf, "%s %d\n",
695 val->string, bond->params.primary_reselect);
696}
697
698static ssize_t bonding_store_primary_reselect(struct device *d,
699 struct device_attribute *attr,
700 const char *buf, size_t count)
701{
702 struct bonding *bond = to_bond(d);
703 int ret;
704
705 ret = bond_opt_tryset_rtnl(bond, BOND_OPT_PRIMARY_RESELECT,
706 (char *)buf);
707 if (!ret)
708 ret = count;
709
710 return ret;
711}
712static DEVICE_ATTR(primary_reselect, S_IRUGO | S_IWUSR,
713 bonding_show_primary_reselect,
714 bonding_store_primary_reselect);
715
716/*
717 * Show and set the use_carrier flag.
718 */
719static ssize_t bonding_show_carrier(struct device *d,
720 struct device_attribute *attr,
721 char *buf)
722{
723 struct bonding *bond = to_bond(d);
724
725 return sprintf(buf, "%d\n", bond->params.use_carrier);
726}
727
728static ssize_t bonding_store_carrier(struct device *d,
729 struct device_attribute *attr,
730 const char *buf, size_t count)
731{
732 struct bonding *bond = to_bond(d);
733 int ret;
734
735 ret = bond_opt_tryset_rtnl(bond, BOND_OPT_USE_CARRIER, (char *)buf);
736 if (!ret)
737 ret = count;
738
739 return ret;
740}
741static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR,
742 bonding_show_carrier, bonding_store_carrier);
743
744
745/*
746 * Show and set currently active_slave.
747 */
748static ssize_t bonding_show_active_slave(struct device *d,
749 struct device_attribute *attr,
750 char *buf)
751{
752 struct bonding *bond = to_bond(d);
753 struct net_device *slave_dev;
754 int count = 0;
755
756 rcu_read_lock();
757 slave_dev = bond_option_active_slave_get_rcu(bond);
758 if (slave_dev)
759 count = sprintf(buf, "%s\n", slave_dev->name);
760 rcu_read_unlock();
761
762 return count;
763}
764
765static ssize_t bonding_store_active_slave(struct device *d,
766 struct device_attribute *attr,
767 const char *buf, size_t count)
768{
769 struct bonding *bond = to_bond(d);
770 int ret;
771
772 ret = bond_opt_tryset_rtnl(bond, BOND_OPT_ACTIVE_SLAVE, (char *)buf);
773 if (!ret)
774 ret = count;
775
776 return ret;
777}
778static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR,
779 bonding_show_active_slave, bonding_store_active_slave);
780
781
782/*
783 * Show link status of the bond interface.
784 */
785static ssize_t bonding_show_mii_status(struct device *d,
786 struct device_attribute *attr,
787 char *buf)
788{
789 struct bonding *bond = to_bond(d);
790
791 return sprintf(buf, "%s\n", bond->curr_active_slave ? "up" : "down");
792}
793static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
794
795/*
796 * Show current 802.3ad aggregator ID.
797 */
798static ssize_t bonding_show_ad_aggregator(struct device *d,
799 struct device_attribute *attr,
800 char *buf)
801{
802 int count = 0;
803 struct bonding *bond = to_bond(d);
804
805 if (bond->params.mode == BOND_MODE_8023AD) {
806 struct ad_info ad_info;
807 count = sprintf(buf, "%d\n",
808 bond_3ad_get_active_agg_info(bond, &ad_info)
809 ? 0 : ad_info.aggregator_id);
810 }
811
812 return count;
813}
814static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
815
816
817/*
818 * Show number of active 802.3ad ports.
819 */
820static ssize_t bonding_show_ad_num_ports(struct device *d,
821 struct device_attribute *attr,
822 char *buf)
823{
824 int count = 0;
825 struct bonding *bond = to_bond(d);
826
827 if (bond->params.mode == BOND_MODE_8023AD) {
828 struct ad_info ad_info;
829 count = sprintf(buf, "%d\n",
830 bond_3ad_get_active_agg_info(bond, &ad_info)
831 ? 0 : ad_info.ports);
832 }
833
834 return count;
835}
836static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
837
838
839/*
840 * Show current 802.3ad actor key.
841 */
842static ssize_t bonding_show_ad_actor_key(struct device *d,
843 struct device_attribute *attr,
844 char *buf)
845{
846 int count = 0;
847 struct bonding *bond = to_bond(d);
848
849 if (bond->params.mode == BOND_MODE_8023AD) {
850 struct ad_info ad_info;
851 count = sprintf(buf, "%d\n",
852 bond_3ad_get_active_agg_info(bond, &ad_info)
853 ? 0 : ad_info.actor_key);
854 }
855
856 return count;
857}
858static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
859
860
861/*
862 * Show current 802.3ad partner key.
863 */
864static ssize_t bonding_show_ad_partner_key(struct device *d,
865 struct device_attribute *attr,
866 char *buf)
867{
868 int count = 0;
869 struct bonding *bond = to_bond(d);
870
871 if (bond->params.mode == BOND_MODE_8023AD) {
872 struct ad_info ad_info;
873 count = sprintf(buf, "%d\n",
874 bond_3ad_get_active_agg_info(bond, &ad_info)
875 ? 0 : ad_info.partner_key);
876 }
877
878 return count;
879}
880static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
881
882
883/*
884 * Show current 802.3ad partner mac.
885 */
886static ssize_t bonding_show_ad_partner_mac(struct device *d,
887 struct device_attribute *attr,
888 char *buf)
889{
890 int count = 0;
891 struct bonding *bond = to_bond(d);
892
893 if (bond->params.mode == BOND_MODE_8023AD) {
894 struct ad_info ad_info;
895 if (!bond_3ad_get_active_agg_info(bond, &ad_info))
896 count = sprintf(buf, "%pM\n", ad_info.partner_system);
897 }
898
899 return count;
900}
901static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
902
903/*
904 * Show the queue_ids of the slaves in the current bond.
905 */
906static ssize_t bonding_show_queue_id(struct device *d,
907 struct device_attribute *attr,
908 char *buf)
909{
910 struct bonding *bond = to_bond(d);
911 struct list_head *iter;
912 struct slave *slave;
913 int res = 0;
914
915 if (!rtnl_trylock())
916 return restart_syscall();
917
918 bond_for_each_slave(bond, slave, iter) {
919 if (res > (PAGE_SIZE - IFNAMSIZ - 6)) {
920 /* not enough space for another interface_name:queue_id pair */
921 if ((PAGE_SIZE - res) > 10)
922 res = PAGE_SIZE - 10;
923 res += sprintf(buf + res, "++more++ ");
924 break;
925 }
926 res += sprintf(buf + res, "%s:%d ",
927 slave->dev->name, slave->queue_id);
928 }
929 if (res)
930 buf[res-1] = '\n'; /* eat the leftover space */
931
932 rtnl_unlock();
933
934 return res;
935}
936
937/*
938 * Set the queue_ids of the slaves in the current bond. The bond
939 * interface must be enslaved for this to work.
940 */
941static ssize_t bonding_store_queue_id(struct device *d,
942 struct device_attribute *attr,
943 const char *buffer, size_t count)
944{
945 struct bonding *bond = to_bond(d);
946 int ret;
947
948 ret = bond_opt_tryset_rtnl(bond, BOND_OPT_QUEUE_ID, (char *)buffer);
949 if (!ret)
950 ret = count;
951
952 return ret;
953}
954static DEVICE_ATTR(queue_id, S_IRUGO | S_IWUSR, bonding_show_queue_id,
955 bonding_store_queue_id);
956
957
958/*
959 * Show and set the all_slaves_active flag.
960 */
961static ssize_t bonding_show_slaves_active(struct device *d,
962 struct device_attribute *attr,
963 char *buf)
964{
965 struct bonding *bond = to_bond(d);
966
967 return sprintf(buf, "%d\n", bond->params.all_slaves_active);
968}
969
970static ssize_t bonding_store_slaves_active(struct device *d,
971 struct device_attribute *attr,
972 const char *buf, size_t count)
973{
974 struct bonding *bond = to_bond(d);
975 int ret;
976
977 ret = bond_opt_tryset_rtnl(bond, BOND_OPT_ALL_SLAVES_ACTIVE,
978 (char *)buf);
979 if (!ret)
980 ret = count;
981
982 return ret;
983}
984static DEVICE_ATTR(all_slaves_active, S_IRUGO | S_IWUSR,
985 bonding_show_slaves_active, bonding_store_slaves_active);
986
987/*
988 * Show and set the number of IGMP membership reports to send on link failure
989 */
990static ssize_t bonding_show_resend_igmp(struct device *d,
991 struct device_attribute *attr,
992 char *buf)
993{
994 struct bonding *bond = to_bond(d);
995
996 return sprintf(buf, "%d\n", bond->params.resend_igmp);
997}
998
999static ssize_t bonding_store_resend_igmp(struct device *d,
1000 struct device_attribute *attr,
1001 const char *buf, size_t count)
1002{
1003 struct bonding *bond = to_bond(d);
1004 int ret;
1005
1006 ret = bond_opt_tryset_rtnl(bond, BOND_OPT_RESEND_IGMP, (char *)buf);
1007 if (!ret)
1008 ret = count;
1009
1010 return ret;
1011}
1012
1013static DEVICE_ATTR(resend_igmp, S_IRUGO | S_IWUSR,
1014 bonding_show_resend_igmp, bonding_store_resend_igmp);
1015
1016
1017static ssize_t bonding_show_lp_interval(struct device *d,
1018 struct device_attribute *attr,
1019 char *buf)
1020{
1021 struct bonding *bond = to_bond(d);
1022 return sprintf(buf, "%d\n", bond->params.lp_interval);
1023}
1024
1025static ssize_t bonding_store_lp_interval(struct device *d,
1026 struct device_attribute *attr,
1027 const char *buf, size_t count)
1028{
1029 struct bonding *bond = to_bond(d);
1030 int ret;
1031
1032 ret = bond_opt_tryset_rtnl(bond, BOND_OPT_LP_INTERVAL, (char *)buf);
1033 if (!ret)
1034 ret = count;
1035
1036 return ret;
1037}
1038
1039static DEVICE_ATTR(lp_interval, S_IRUGO | S_IWUSR,
1040 bonding_show_lp_interval, bonding_store_lp_interval);
1041
1042static ssize_t bonding_show_packets_per_slave(struct device *d,
1043 struct device_attribute *attr,
1044 char *buf)
1045{
1046 struct bonding *bond = to_bond(d);
1047 unsigned int packets_per_slave = bond->params.packets_per_slave;
1048 return sprintf(buf, "%u\n", packets_per_slave);
1049}
1050
1051static ssize_t bonding_store_packets_per_slave(struct device *d,
1052 struct device_attribute *attr,
1053 const char *buf, size_t count)
1054{
1055 struct bonding *bond = to_bond(d);
1056 int ret;
1057
1058 ret = bond_opt_tryset_rtnl(bond, BOND_OPT_PACKETS_PER_SLAVE,
1059 (char *)buf);
1060 if (!ret)
1061 ret = count;
1062
1063 return ret;
1064}
1065
1066static DEVICE_ATTR(packets_per_slave, S_IRUGO | S_IWUSR,
1067 bonding_show_packets_per_slave,
1068 bonding_store_packets_per_slave);
1069
1070static struct attribute *per_bond_attrs[] = {
1071 &dev_attr_slaves.attr,
1072 &dev_attr_mode.attr,
1073 &dev_attr_fail_over_mac.attr,
1074 &dev_attr_arp_validate.attr,
1075 &dev_attr_arp_all_targets.attr,
1076 &dev_attr_arp_interval.attr,
1077 &dev_attr_arp_ip_target.attr,
1078 &dev_attr_downdelay.attr,
1079 &dev_attr_updelay.attr,
1080 &dev_attr_lacp_rate.attr,
1081 &dev_attr_ad_select.attr,
1082 &dev_attr_xmit_hash_policy.attr,
1083 &dev_attr_num_grat_arp.attr,
1084 &dev_attr_num_unsol_na.attr,
1085 &dev_attr_miimon.attr,
1086 &dev_attr_primary.attr,
1087 &dev_attr_primary_reselect.attr,
1088 &dev_attr_use_carrier.attr,
1089 &dev_attr_active_slave.attr,
1090 &dev_attr_mii_status.attr,
1091 &dev_attr_ad_aggregator.attr,
1092 &dev_attr_ad_num_ports.attr,
1093 &dev_attr_ad_actor_key.attr,
1094 &dev_attr_ad_partner_key.attr,
1095 &dev_attr_ad_partner_mac.attr,
1096 &dev_attr_queue_id.attr,
1097 &dev_attr_all_slaves_active.attr,
1098 &dev_attr_resend_igmp.attr,
1099 &dev_attr_min_links.attr,
1100 &dev_attr_lp_interval.attr,
1101 &dev_attr_packets_per_slave.attr,
1102 NULL,
1103};
1104
1105static struct attribute_group bonding_group = {
1106 .name = "bonding",
1107 .attrs = per_bond_attrs,
1108};
1109
1110/*
1111 * Initialize sysfs. This sets up the bonding_masters file in
1112 * /sys/class/net.
1113 */
1114int bond_create_sysfs(struct bond_net *bn)
1115{
1116 int ret;
1117
1118 bn->class_attr_bonding_masters = class_attr_bonding_masters;
1119 sysfs_attr_init(&bn->class_attr_bonding_masters.attr);
1120
1121 ret = netdev_class_create_file_ns(&bn->class_attr_bonding_masters,
1122 bn->net);
1123 /*
1124 * Permit multiple loads of the module by ignoring failures to
1125 * create the bonding_masters sysfs file. Bonding devices
1126 * created by second or subsequent loads of the module will
1127 * not be listed in, or controllable by, bonding_masters, but
1128 * will have the usual "bonding" sysfs directory.
1129 *
1130 * This is done to preserve backwards compatibility for
1131 * initscripts/sysconfig, which load bonding multiple times to
1132 * configure multiple bonding devices.
1133 */
1134 if (ret == -EEXIST) {
1135 /* Is someone being kinky and naming a device bonding_master? */
1136 if (__dev_get_by_name(bn->net,
1137 class_attr_bonding_masters.attr.name))
1138 pr_err("network device named %s already exists in sysfs\n",
1139 class_attr_bonding_masters.attr.name);
1140 ret = 0;
1141 }
1142
1143 return ret;
1144
1145}
1146
1147/*
1148 * Remove /sys/class/net/bonding_masters.
1149 */
1150void bond_destroy_sysfs(struct bond_net *bn)
1151{
1152 netdev_class_remove_file_ns(&bn->class_attr_bonding_masters, bn->net);
1153}
1154
1155/*
1156 * Initialize sysfs for each bond. This sets up and registers
1157 * the 'bondctl' directory for each individual bond under /sys/class/net.
1158 */
1159void bond_prepare_sysfs_group(struct bonding *bond)
1160{
1161 bond->dev->sysfs_groups[0] = &bonding_group;
1162}
1163
1/*
2 * Copyright(c) 2004-2005 Intel Corporation. All rights reserved.
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License as published by the
6 * Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
11 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * for more details.
13 *
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, see <http://www.gnu.org/licenses/>.
16 *
17 * The full GNU General Public License is included in this distribution in the
18 * file called LICENSE.
19 *
20 */
21
22#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
23
24#include <linux/kernel.h>
25#include <linux/module.h>
26#include <linux/device.h>
27#include <linux/sched.h>
28#include <linux/fs.h>
29#include <linux/types.h>
30#include <linux/string.h>
31#include <linux/netdevice.h>
32#include <linux/inetdevice.h>
33#include <linux/in.h>
34#include <linux/sysfs.h>
35#include <linux/ctype.h>
36#include <linux/inet.h>
37#include <linux/rtnetlink.h>
38#include <linux/etherdevice.h>
39#include <net/net_namespace.h>
40#include <net/netns/generic.h>
41#include <linux/nsproxy.h>
42
43#include <net/bonding.h>
44
45#define to_bond(cd) ((struct bonding *)(netdev_priv(to_net_dev(cd))))
46
47/* "show" function for the bond_masters attribute.
48 * The class parameter is ignored.
49 */
50static ssize_t bonding_show_bonds(struct class *cls,
51 struct class_attribute *attr,
52 char *buf)
53{
54 struct bond_net *bn =
55 container_of(attr, struct bond_net, class_attr_bonding_masters);
56 int res = 0;
57 struct bonding *bond;
58
59 rtnl_lock();
60
61 list_for_each_entry(bond, &bn->dev_list, bond_list) {
62 if (res > (PAGE_SIZE - IFNAMSIZ)) {
63 /* not enough space for another interface name */
64 if ((PAGE_SIZE - res) > 10)
65 res = PAGE_SIZE - 10;
66 res += sprintf(buf + res, "++more++ ");
67 break;
68 }
69 res += sprintf(buf + res, "%s ", bond->dev->name);
70 }
71 if (res)
72 buf[res-1] = '\n'; /* eat the leftover space */
73
74 rtnl_unlock();
75 return res;
76}
77
78static struct net_device *bond_get_by_name(struct bond_net *bn, const char *ifname)
79{
80 struct bonding *bond;
81
82 list_for_each_entry(bond, &bn->dev_list, bond_list) {
83 if (strncmp(bond->dev->name, ifname, IFNAMSIZ) == 0)
84 return bond->dev;
85 }
86 return NULL;
87}
88
89/* "store" function for the bond_masters attribute. This is what
90 * creates and deletes entire bonds.
91 *
92 * The class parameter is ignored.
93 */
94static ssize_t bonding_store_bonds(struct class *cls,
95 struct class_attribute *attr,
96 const char *buffer, size_t count)
97{
98 struct bond_net *bn =
99 container_of(attr, struct bond_net, class_attr_bonding_masters);
100 char command[IFNAMSIZ + 1] = {0, };
101 char *ifname;
102 int rv, res = count;
103
104 sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
105 ifname = command + 1;
106 if ((strlen(command) <= 1) ||
107 !dev_valid_name(ifname))
108 goto err_no_cmd;
109
110 if (command[0] == '+') {
111 pr_info("%s is being created...\n", ifname);
112 rv = bond_create(bn->net, ifname);
113 if (rv) {
114 if (rv == -EEXIST)
115 pr_info("%s already exists\n", ifname);
116 else
117 pr_info("%s creation failed\n", ifname);
118 res = rv;
119 }
120 } else if (command[0] == '-') {
121 struct net_device *bond_dev;
122
123 rtnl_lock();
124 bond_dev = bond_get_by_name(bn, ifname);
125 if (bond_dev) {
126 pr_info("%s is being deleted...\n", ifname);
127 unregister_netdevice(bond_dev);
128 } else {
129 pr_err("unable to delete non-existent %s\n", ifname);
130 res = -ENODEV;
131 }
132 rtnl_unlock();
133 } else
134 goto err_no_cmd;
135
136 /* Always return either count or an error. If you return 0, you'll
137 * get called forever, which is bad.
138 */
139 return res;
140
141err_no_cmd:
142 pr_err("no command found in bonding_masters - use +ifname or -ifname\n");
143 return -EPERM;
144}
145
146/* class attribute for bond_masters file. This ends up in /sys/class/net */
147static const struct class_attribute class_attr_bonding_masters = {
148 .attr = {
149 .name = "bonding_masters",
150 .mode = S_IWUSR | S_IRUGO,
151 },
152 .show = bonding_show_bonds,
153 .store = bonding_store_bonds,
154};
155
156/* Generic "store" method for bonding sysfs option setting */
157static ssize_t bonding_sysfs_store_option(struct device *d,
158 struct device_attribute *attr,
159 const char *buffer, size_t count)
160{
161 struct bonding *bond = to_bond(d);
162 const struct bond_option *opt;
163 int ret;
164
165 opt = bond_opt_get_by_name(attr->attr.name);
166 if (WARN_ON(!opt))
167 return -ENOENT;
168 ret = bond_opt_tryset_rtnl(bond, opt->id, (char *)buffer);
169 if (!ret)
170 ret = count;
171
172 return ret;
173}
174
175/* Show the slaves in the current bond. */
176static ssize_t bonding_show_slaves(struct device *d,
177 struct device_attribute *attr, char *buf)
178{
179 struct bonding *bond = to_bond(d);
180 struct list_head *iter;
181 struct slave *slave;
182 int res = 0;
183
184 if (!rtnl_trylock())
185 return restart_syscall();
186
187 bond_for_each_slave(bond, slave, iter) {
188 if (res > (PAGE_SIZE - IFNAMSIZ)) {
189 /* not enough space for another interface name */
190 if ((PAGE_SIZE - res) > 10)
191 res = PAGE_SIZE - 10;
192 res += sprintf(buf + res, "++more++ ");
193 break;
194 }
195 res += sprintf(buf + res, "%s ", slave->dev->name);
196 }
197
198 rtnl_unlock();
199
200 if (res)
201 buf[res-1] = '\n'; /* eat the leftover space */
202
203 return res;
204}
205static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves,
206 bonding_sysfs_store_option);
207
208/* Show the bonding mode. */
209static ssize_t bonding_show_mode(struct device *d,
210 struct device_attribute *attr, char *buf)
211{
212 struct bonding *bond = to_bond(d);
213 const struct bond_opt_value *val;
214
215 val = bond_opt_get_val(BOND_OPT_MODE, BOND_MODE(bond));
216
217 return sprintf(buf, "%s %d\n", val->string, BOND_MODE(bond));
218}
219static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,
220 bonding_show_mode, bonding_sysfs_store_option);
221
222/* Show the bonding transmit hash method. */
223static ssize_t bonding_show_xmit_hash(struct device *d,
224 struct device_attribute *attr,
225 char *buf)
226{
227 struct bonding *bond = to_bond(d);
228 const struct bond_opt_value *val;
229
230 val = bond_opt_get_val(BOND_OPT_XMIT_HASH, bond->params.xmit_policy);
231
232 return sprintf(buf, "%s %d\n", val->string, bond->params.xmit_policy);
233}
234static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR,
235 bonding_show_xmit_hash, bonding_sysfs_store_option);
236
237/* Show arp_validate. */
238static ssize_t bonding_show_arp_validate(struct device *d,
239 struct device_attribute *attr,
240 char *buf)
241{
242 struct bonding *bond = to_bond(d);
243 const struct bond_opt_value *val;
244
245 val = bond_opt_get_val(BOND_OPT_ARP_VALIDATE,
246 bond->params.arp_validate);
247
248 return sprintf(buf, "%s %d\n", val->string, bond->params.arp_validate);
249}
250static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate,
251 bonding_sysfs_store_option);
252
253/* Show arp_all_targets. */
254static ssize_t bonding_show_arp_all_targets(struct device *d,
255 struct device_attribute *attr,
256 char *buf)
257{
258 struct bonding *bond = to_bond(d);
259 const struct bond_opt_value *val;
260
261 val = bond_opt_get_val(BOND_OPT_ARP_ALL_TARGETS,
262 bond->params.arp_all_targets);
263 return sprintf(buf, "%s %d\n",
264 val->string, bond->params.arp_all_targets);
265}
266static DEVICE_ATTR(arp_all_targets, S_IRUGO | S_IWUSR,
267 bonding_show_arp_all_targets, bonding_sysfs_store_option);
268
269/* Show fail_over_mac. */
270static ssize_t bonding_show_fail_over_mac(struct device *d,
271 struct device_attribute *attr,
272 char *buf)
273{
274 struct bonding *bond = to_bond(d);
275 const struct bond_opt_value *val;
276
277 val = bond_opt_get_val(BOND_OPT_FAIL_OVER_MAC,
278 bond->params.fail_over_mac);
279
280 return sprintf(buf, "%s %d\n", val->string, bond->params.fail_over_mac);
281}
282static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR,
283 bonding_show_fail_over_mac, bonding_sysfs_store_option);
284
285/* Show the arp timer interval. */
286static ssize_t bonding_show_arp_interval(struct device *d,
287 struct device_attribute *attr,
288 char *buf)
289{
290 struct bonding *bond = to_bond(d);
291
292 return sprintf(buf, "%d\n", bond->params.arp_interval);
293}
294static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR,
295 bonding_show_arp_interval, bonding_sysfs_store_option);
296
297/* Show the arp targets. */
298static ssize_t bonding_show_arp_targets(struct device *d,
299 struct device_attribute *attr,
300 char *buf)
301{
302 struct bonding *bond = to_bond(d);
303 int i, res = 0;
304
305 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
306 if (bond->params.arp_targets[i])
307 res += sprintf(buf + res, "%pI4 ",
308 &bond->params.arp_targets[i]);
309 }
310 if (res)
311 buf[res-1] = '\n'; /* eat the leftover space */
312
313 return res;
314}
315static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR,
316 bonding_show_arp_targets, bonding_sysfs_store_option);
317
318/* Show the up and down delays. */
319static ssize_t bonding_show_downdelay(struct device *d,
320 struct device_attribute *attr,
321 char *buf)
322{
323 struct bonding *bond = to_bond(d);
324
325 return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
326}
327static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR,
328 bonding_show_downdelay, bonding_sysfs_store_option);
329
330static ssize_t bonding_show_updelay(struct device *d,
331 struct device_attribute *attr,
332 char *buf)
333{
334 struct bonding *bond = to_bond(d);
335
336 return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
337
338}
339static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR,
340 bonding_show_updelay, bonding_sysfs_store_option);
341
342/* Show the LACP interval. */
343static ssize_t bonding_show_lacp(struct device *d,
344 struct device_attribute *attr,
345 char *buf)
346{
347 struct bonding *bond = to_bond(d);
348 const struct bond_opt_value *val;
349
350 val = bond_opt_get_val(BOND_OPT_LACP_RATE, bond->params.lacp_fast);
351
352 return sprintf(buf, "%s %d\n", val->string, bond->params.lacp_fast);
353}
354static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR,
355 bonding_show_lacp, bonding_sysfs_store_option);
356
357static ssize_t bonding_show_min_links(struct device *d,
358 struct device_attribute *attr,
359 char *buf)
360{
361 struct bonding *bond = to_bond(d);
362
363 return sprintf(buf, "%u\n", bond->params.min_links);
364}
365static DEVICE_ATTR(min_links, S_IRUGO | S_IWUSR,
366 bonding_show_min_links, bonding_sysfs_store_option);
367
368static ssize_t bonding_show_ad_select(struct device *d,
369 struct device_attribute *attr,
370 char *buf)
371{
372 struct bonding *bond = to_bond(d);
373 const struct bond_opt_value *val;
374
375 val = bond_opt_get_val(BOND_OPT_AD_SELECT, bond->params.ad_select);
376
377 return sprintf(buf, "%s %d\n", val->string, bond->params.ad_select);
378}
379static DEVICE_ATTR(ad_select, S_IRUGO | S_IWUSR,
380 bonding_show_ad_select, bonding_sysfs_store_option);
381
382/* Show the number of peer notifications to send after a failover event. */
383static ssize_t bonding_show_num_peer_notif(struct device *d,
384 struct device_attribute *attr,
385 char *buf)
386{
387 struct bonding *bond = to_bond(d);
388 return sprintf(buf, "%d\n", bond->params.num_peer_notif);
389}
390static DEVICE_ATTR(num_grat_arp, S_IRUGO | S_IWUSR,
391 bonding_show_num_peer_notif, bonding_sysfs_store_option);
392static DEVICE_ATTR(num_unsol_na, S_IRUGO | S_IWUSR,
393 bonding_show_num_peer_notif, bonding_sysfs_store_option);
394
395/* Show the MII monitor interval. */
396static ssize_t bonding_show_miimon(struct device *d,
397 struct device_attribute *attr,
398 char *buf)
399{
400 struct bonding *bond = to_bond(d);
401
402 return sprintf(buf, "%d\n", bond->params.miimon);
403}
404static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR,
405 bonding_show_miimon, bonding_sysfs_store_option);
406
407/* Show the primary slave. */
408static ssize_t bonding_show_primary(struct device *d,
409 struct device_attribute *attr,
410 char *buf)
411{
412 struct bonding *bond = to_bond(d);
413 struct slave *primary;
414 int count = 0;
415
416 rcu_read_lock();
417 primary = rcu_dereference(bond->primary_slave);
418 if (primary)
419 count = sprintf(buf, "%s\n", primary->dev->name);
420 rcu_read_unlock();
421
422 return count;
423}
424static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR,
425 bonding_show_primary, bonding_sysfs_store_option);
426
427/* Show the primary_reselect flag. */
428static ssize_t bonding_show_primary_reselect(struct device *d,
429 struct device_attribute *attr,
430 char *buf)
431{
432 struct bonding *bond = to_bond(d);
433 const struct bond_opt_value *val;
434
435 val = bond_opt_get_val(BOND_OPT_PRIMARY_RESELECT,
436 bond->params.primary_reselect);
437
438 return sprintf(buf, "%s %d\n",
439 val->string, bond->params.primary_reselect);
440}
441static DEVICE_ATTR(primary_reselect, S_IRUGO | S_IWUSR,
442 bonding_show_primary_reselect, bonding_sysfs_store_option);
443
444/* Show the use_carrier flag. */
445static ssize_t bonding_show_carrier(struct device *d,
446 struct device_attribute *attr,
447 char *buf)
448{
449 struct bonding *bond = to_bond(d);
450
451 return sprintf(buf, "%d\n", bond->params.use_carrier);
452}
453static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR,
454 bonding_show_carrier, bonding_sysfs_store_option);
455
456
457/* Show currently active_slave. */
458static ssize_t bonding_show_active_slave(struct device *d,
459 struct device_attribute *attr,
460 char *buf)
461{
462 struct bonding *bond = to_bond(d);
463 struct net_device *slave_dev;
464 int count = 0;
465
466 rcu_read_lock();
467 slave_dev = bond_option_active_slave_get_rcu(bond);
468 if (slave_dev)
469 count = sprintf(buf, "%s\n", slave_dev->name);
470 rcu_read_unlock();
471
472 return count;
473}
474static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR,
475 bonding_show_active_slave, bonding_sysfs_store_option);
476
477/* Show link status of the bond interface. */
478static ssize_t bonding_show_mii_status(struct device *d,
479 struct device_attribute *attr,
480 char *buf)
481{
482 struct bonding *bond = to_bond(d);
483 bool active = netif_carrier_ok(bond->dev);
484
485 return sprintf(buf, "%s\n", active ? "up" : "down");
486}
487static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
488
489/* Show current 802.3ad aggregator ID. */
490static ssize_t bonding_show_ad_aggregator(struct device *d,
491 struct device_attribute *attr,
492 char *buf)
493{
494 int count = 0;
495 struct bonding *bond = to_bond(d);
496
497 if (BOND_MODE(bond) == BOND_MODE_8023AD) {
498 struct ad_info ad_info;
499 count = sprintf(buf, "%d\n",
500 bond_3ad_get_active_agg_info(bond, &ad_info)
501 ? 0 : ad_info.aggregator_id);
502 }
503
504 return count;
505}
506static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
507
508
509/* Show number of active 802.3ad ports. */
510static ssize_t bonding_show_ad_num_ports(struct device *d,
511 struct device_attribute *attr,
512 char *buf)
513{
514 int count = 0;
515 struct bonding *bond = to_bond(d);
516
517 if (BOND_MODE(bond) == BOND_MODE_8023AD) {
518 struct ad_info ad_info;
519 count = sprintf(buf, "%d\n",
520 bond_3ad_get_active_agg_info(bond, &ad_info)
521 ? 0 : ad_info.ports);
522 }
523
524 return count;
525}
526static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
527
528
529/* Show current 802.3ad actor key. */
530static ssize_t bonding_show_ad_actor_key(struct device *d,
531 struct device_attribute *attr,
532 char *buf)
533{
534 int count = 0;
535 struct bonding *bond = to_bond(d);
536
537 if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN)) {
538 struct ad_info ad_info;
539 count = sprintf(buf, "%d\n",
540 bond_3ad_get_active_agg_info(bond, &ad_info)
541 ? 0 : ad_info.actor_key);
542 }
543
544 return count;
545}
546static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
547
548
549/* Show current 802.3ad partner key. */
550static ssize_t bonding_show_ad_partner_key(struct device *d,
551 struct device_attribute *attr,
552 char *buf)
553{
554 int count = 0;
555 struct bonding *bond = to_bond(d);
556
557 if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN)) {
558 struct ad_info ad_info;
559 count = sprintf(buf, "%d\n",
560 bond_3ad_get_active_agg_info(bond, &ad_info)
561 ? 0 : ad_info.partner_key);
562 }
563
564 return count;
565}
566static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
567
568
569/* Show current 802.3ad partner mac. */
570static ssize_t bonding_show_ad_partner_mac(struct device *d,
571 struct device_attribute *attr,
572 char *buf)
573{
574 int count = 0;
575 struct bonding *bond = to_bond(d);
576
577 if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN)) {
578 struct ad_info ad_info;
579 if (!bond_3ad_get_active_agg_info(bond, &ad_info))
580 count = sprintf(buf, "%pM\n", ad_info.partner_system);
581 }
582
583 return count;
584}
585static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
586
587/* Show the queue_ids of the slaves in the current bond. */
588static ssize_t bonding_show_queue_id(struct device *d,
589 struct device_attribute *attr,
590 char *buf)
591{
592 struct bonding *bond = to_bond(d);
593 struct list_head *iter;
594 struct slave *slave;
595 int res = 0;
596
597 if (!rtnl_trylock())
598 return restart_syscall();
599
600 bond_for_each_slave(bond, slave, iter) {
601 if (res > (PAGE_SIZE - IFNAMSIZ - 6)) {
602 /* not enough space for another interface_name:queue_id pair */
603 if ((PAGE_SIZE - res) > 10)
604 res = PAGE_SIZE - 10;
605 res += sprintf(buf + res, "++more++ ");
606 break;
607 }
608 res += sprintf(buf + res, "%s:%d ",
609 slave->dev->name, slave->queue_id);
610 }
611 if (res)
612 buf[res-1] = '\n'; /* eat the leftover space */
613
614 rtnl_unlock();
615
616 return res;
617}
618static DEVICE_ATTR(queue_id, S_IRUGO | S_IWUSR, bonding_show_queue_id,
619 bonding_sysfs_store_option);
620
621
622/* Show the all_slaves_active flag. */
623static ssize_t bonding_show_slaves_active(struct device *d,
624 struct device_attribute *attr,
625 char *buf)
626{
627 struct bonding *bond = to_bond(d);
628
629 return sprintf(buf, "%d\n", bond->params.all_slaves_active);
630}
631static DEVICE_ATTR(all_slaves_active, S_IRUGO | S_IWUSR,
632 bonding_show_slaves_active, bonding_sysfs_store_option);
633
634/* Show the number of IGMP membership reports to send on link failure */
635static ssize_t bonding_show_resend_igmp(struct device *d,
636 struct device_attribute *attr,
637 char *buf)
638{
639 struct bonding *bond = to_bond(d);
640
641 return sprintf(buf, "%d\n", bond->params.resend_igmp);
642}
643static DEVICE_ATTR(resend_igmp, S_IRUGO | S_IWUSR,
644 bonding_show_resend_igmp, bonding_sysfs_store_option);
645
646
647static ssize_t bonding_show_lp_interval(struct device *d,
648 struct device_attribute *attr,
649 char *buf)
650{
651 struct bonding *bond = to_bond(d);
652
653 return sprintf(buf, "%d\n", bond->params.lp_interval);
654}
655static DEVICE_ATTR(lp_interval, S_IRUGO | S_IWUSR,
656 bonding_show_lp_interval, bonding_sysfs_store_option);
657
658static ssize_t bonding_show_tlb_dynamic_lb(struct device *d,
659 struct device_attribute *attr,
660 char *buf)
661{
662 struct bonding *bond = to_bond(d);
663 return sprintf(buf, "%d\n", bond->params.tlb_dynamic_lb);
664}
665static DEVICE_ATTR(tlb_dynamic_lb, S_IRUGO | S_IWUSR,
666 bonding_show_tlb_dynamic_lb, bonding_sysfs_store_option);
667
668static ssize_t bonding_show_packets_per_slave(struct device *d,
669 struct device_attribute *attr,
670 char *buf)
671{
672 struct bonding *bond = to_bond(d);
673 unsigned int packets_per_slave = bond->params.packets_per_slave;
674
675 return sprintf(buf, "%u\n", packets_per_slave);
676}
677static DEVICE_ATTR(packets_per_slave, S_IRUGO | S_IWUSR,
678 bonding_show_packets_per_slave, bonding_sysfs_store_option);
679
680static ssize_t bonding_show_ad_actor_sys_prio(struct device *d,
681 struct device_attribute *attr,
682 char *buf)
683{
684 struct bonding *bond = to_bond(d);
685
686 if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN))
687 return sprintf(buf, "%hu\n", bond->params.ad_actor_sys_prio);
688
689 return 0;
690}
691static DEVICE_ATTR(ad_actor_sys_prio, S_IRUGO | S_IWUSR,
692 bonding_show_ad_actor_sys_prio, bonding_sysfs_store_option);
693
694static ssize_t bonding_show_ad_actor_system(struct device *d,
695 struct device_attribute *attr,
696 char *buf)
697{
698 struct bonding *bond = to_bond(d);
699
700 if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN))
701 return sprintf(buf, "%pM\n", bond->params.ad_actor_system);
702
703 return 0;
704}
705
706static DEVICE_ATTR(ad_actor_system, S_IRUGO | S_IWUSR,
707 bonding_show_ad_actor_system, bonding_sysfs_store_option);
708
709static ssize_t bonding_show_ad_user_port_key(struct device *d,
710 struct device_attribute *attr,
711 char *buf)
712{
713 struct bonding *bond = to_bond(d);
714
715 if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN))
716 return sprintf(buf, "%hu\n", bond->params.ad_user_port_key);
717
718 return 0;
719}
720static DEVICE_ATTR(ad_user_port_key, S_IRUGO | S_IWUSR,
721 bonding_show_ad_user_port_key, bonding_sysfs_store_option);
722
723static struct attribute *per_bond_attrs[] = {
724 &dev_attr_slaves.attr,
725 &dev_attr_mode.attr,
726 &dev_attr_fail_over_mac.attr,
727 &dev_attr_arp_validate.attr,
728 &dev_attr_arp_all_targets.attr,
729 &dev_attr_arp_interval.attr,
730 &dev_attr_arp_ip_target.attr,
731 &dev_attr_downdelay.attr,
732 &dev_attr_updelay.attr,
733 &dev_attr_lacp_rate.attr,
734 &dev_attr_ad_select.attr,
735 &dev_attr_xmit_hash_policy.attr,
736 &dev_attr_num_grat_arp.attr,
737 &dev_attr_num_unsol_na.attr,
738 &dev_attr_miimon.attr,
739 &dev_attr_primary.attr,
740 &dev_attr_primary_reselect.attr,
741 &dev_attr_use_carrier.attr,
742 &dev_attr_active_slave.attr,
743 &dev_attr_mii_status.attr,
744 &dev_attr_ad_aggregator.attr,
745 &dev_attr_ad_num_ports.attr,
746 &dev_attr_ad_actor_key.attr,
747 &dev_attr_ad_partner_key.attr,
748 &dev_attr_ad_partner_mac.attr,
749 &dev_attr_queue_id.attr,
750 &dev_attr_all_slaves_active.attr,
751 &dev_attr_resend_igmp.attr,
752 &dev_attr_min_links.attr,
753 &dev_attr_lp_interval.attr,
754 &dev_attr_packets_per_slave.attr,
755 &dev_attr_tlb_dynamic_lb.attr,
756 &dev_attr_ad_actor_sys_prio.attr,
757 &dev_attr_ad_actor_system.attr,
758 &dev_attr_ad_user_port_key.attr,
759 NULL,
760};
761
762static struct attribute_group bonding_group = {
763 .name = "bonding",
764 .attrs = per_bond_attrs,
765};
766
767/* Initialize sysfs. This sets up the bonding_masters file in
768 * /sys/class/net.
769 */
770int bond_create_sysfs(struct bond_net *bn)
771{
772 int ret;
773
774 bn->class_attr_bonding_masters = class_attr_bonding_masters;
775 sysfs_attr_init(&bn->class_attr_bonding_masters.attr);
776
777 ret = netdev_class_create_file_ns(&bn->class_attr_bonding_masters,
778 bn->net);
779 /* Permit multiple loads of the module by ignoring failures to
780 * create the bonding_masters sysfs file. Bonding devices
781 * created by second or subsequent loads of the module will
782 * not be listed in, or controllable by, bonding_masters, but
783 * will have the usual "bonding" sysfs directory.
784 *
785 * This is done to preserve backwards compatibility for
786 * initscripts/sysconfig, which load bonding multiple times to
787 * configure multiple bonding devices.
788 */
789 if (ret == -EEXIST) {
790 /* Is someone being kinky and naming a device bonding_master? */
791 if (__dev_get_by_name(bn->net,
792 class_attr_bonding_masters.attr.name))
793 pr_err("network device named %s already exists in sysfs\n",
794 class_attr_bonding_masters.attr.name);
795 ret = 0;
796 }
797
798 return ret;
799
800}
801
802/* Remove /sys/class/net/bonding_masters. */
803void bond_destroy_sysfs(struct bond_net *bn)
804{
805 netdev_class_remove_file_ns(&bn->class_attr_bonding_masters, bn->net);
806}
807
808/* Initialize sysfs for each bond. This sets up and registers
809 * the 'bondctl' directory for each individual bond under /sys/class/net.
810 */
811void bond_prepare_sysfs_group(struct bonding *bond)
812{
813 bond->dev->sysfs_groups[0] = &bonding_group;
814}
815