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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// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright(c) 2004-2005 Intel Corporation. All rights reserved.
4 */
5
6#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
7
8#include <linux/kernel.h>
9#include <linux/module.h>
10#include <linux/device.h>
11#include <linux/sched/signal.h>
12#include <linux/fs.h>
13#include <linux/types.h>
14#include <linux/string.h>
15#include <linux/netdevice.h>
16#include <linux/inetdevice.h>
17#include <linux/in.h>
18#include <linux/sysfs.h>
19#include <linux/ctype.h>
20#include <linux/inet.h>
21#include <linux/rtnetlink.h>
22#include <linux/etherdevice.h>
23#include <net/net_namespace.h>
24#include <net/netns/generic.h>
25#include <linux/nsproxy.h>
26
27#include <net/bonding.h>
28
29#define to_bond(cd) ((struct bonding *)(netdev_priv(to_net_dev(cd))))
30
31/* "show" function for the bond_masters attribute.
32 * The class parameter is ignored.
33 */
34static ssize_t bonding_show_bonds(const struct class *cls,
35 const struct class_attribute *attr,
36 char *buf)
37{
38 const struct bond_net *bn =
39 container_of_const(attr, struct bond_net, class_attr_bonding_masters);
40 struct bonding *bond;
41 int res = 0;
42
43 rcu_read_lock();
44
45 list_for_each_entry_rcu(bond, &bn->dev_list, bond_list) {
46 if (res > (PAGE_SIZE - IFNAMSIZ)) {
47 /* not enough space for another interface name */
48 if ((PAGE_SIZE - res) > 10)
49 res = PAGE_SIZE - 10;
50 res += sysfs_emit_at(buf, res, "++more++ ");
51 break;
52 }
53 res += sysfs_emit_at(buf, res, "%s ", bond->dev->name);
54 }
55 if (res)
56 buf[res-1] = '\n'; /* eat the leftover space */
57
58 rcu_read_unlock();
59 return res;
60}
61
62static struct net_device *bond_get_by_name(const struct bond_net *bn, const char *ifname)
63{
64 struct bonding *bond;
65
66 list_for_each_entry(bond, &bn->dev_list, bond_list) {
67 if (strncmp(bond->dev->name, ifname, IFNAMSIZ) == 0)
68 return bond->dev;
69 }
70 return NULL;
71}
72
73/* "store" function for the bond_masters attribute. This is what
74 * creates and deletes entire bonds.
75 *
76 * The class parameter is ignored.
77 */
78static ssize_t bonding_store_bonds(const struct class *cls,
79 const struct class_attribute *attr,
80 const char *buffer, size_t count)
81{
82 const struct bond_net *bn =
83 container_of_const(attr, struct bond_net, class_attr_bonding_masters);
84 char command[IFNAMSIZ + 1] = {0, };
85 char *ifname;
86 int rv, res = count;
87
88 sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
89 ifname = command + 1;
90 if ((strlen(command) <= 1) ||
91 !dev_valid_name(ifname))
92 goto err_no_cmd;
93
94 if (command[0] == '+') {
95 pr_info("%s is being created...\n", ifname);
96 rv = bond_create(bn->net, ifname);
97 if (rv) {
98 if (rv == -EEXIST)
99 pr_info("%s already exists\n", ifname);
100 else
101 pr_info("%s creation failed\n", ifname);
102 res = rv;
103 }
104 } else if (command[0] == '-') {
105 struct net_device *bond_dev;
106
107 rtnl_lock();
108 bond_dev = bond_get_by_name(bn, ifname);
109 if (bond_dev) {
110 pr_info("%s is being deleted...\n", ifname);
111 unregister_netdevice(bond_dev);
112 } else {
113 pr_err("unable to delete non-existent %s\n", ifname);
114 res = -ENODEV;
115 }
116 rtnl_unlock();
117 } else
118 goto err_no_cmd;
119
120 /* Always return either count or an error. If you return 0, you'll
121 * get called forever, which is bad.
122 */
123 return res;
124
125err_no_cmd:
126 pr_err("no command found in bonding_masters - use +ifname or -ifname\n");
127 return -EPERM;
128}
129
130/* class attribute for bond_masters file. This ends up in /sys/class/net */
131static const struct class_attribute class_attr_bonding_masters = {
132 .attr = {
133 .name = "bonding_masters",
134 .mode = 0644,
135 },
136 .show = bonding_show_bonds,
137 .store = bonding_store_bonds,
138};
139
140/* Generic "store" method for bonding sysfs option setting */
141static ssize_t bonding_sysfs_store_option(struct device *d,
142 struct device_attribute *attr,
143 const char *buffer, size_t count)
144{
145 struct bonding *bond = to_bond(d);
146 const struct bond_option *opt;
147 char *buffer_clone;
148 int ret;
149
150 opt = bond_opt_get_by_name(attr->attr.name);
151 if (WARN_ON(!opt))
152 return -ENOENT;
153 buffer_clone = kstrndup(buffer, count, GFP_KERNEL);
154 if (!buffer_clone)
155 return -ENOMEM;
156 ret = bond_opt_tryset_rtnl(bond, opt->id, buffer_clone);
157 if (!ret)
158 ret = count;
159 kfree(buffer_clone);
160
161 return ret;
162}
163
164/* Show the slaves in the current bond. */
165static ssize_t bonding_show_slaves(struct device *d,
166 struct device_attribute *attr, char *buf)
167{
168 struct bonding *bond = to_bond(d);
169 struct list_head *iter;
170 struct slave *slave;
171 int res = 0;
172
173 rcu_read_lock();
174
175 bond_for_each_slave_rcu(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 += sysfs_emit_at(buf, res, "++more++ ");
181 break;
182 }
183 res += sysfs_emit_at(buf, res, "%s ", slave->dev->name);
184 }
185
186 rcu_read_unlock();
187
188 if (res)
189 buf[res-1] = '\n'; /* eat the leftover space */
190
191 return res;
192}
193static DEVICE_ATTR(slaves, 0644, bonding_show_slaves,
194 bonding_sysfs_store_option);
195
196/* Show the bonding mode. */
197static ssize_t bonding_show_mode(struct device *d,
198 struct device_attribute *attr, char *buf)
199{
200 struct bonding *bond = to_bond(d);
201 const struct bond_opt_value *val;
202
203 val = bond_opt_get_val(BOND_OPT_MODE, BOND_MODE(bond));
204
205 return sysfs_emit(buf, "%s %d\n", val->string, BOND_MODE(bond));
206}
207static DEVICE_ATTR(mode, 0644, bonding_show_mode, bonding_sysfs_store_option);
208
209/* Show the bonding transmit hash method. */
210static ssize_t bonding_show_xmit_hash(struct device *d,
211 struct device_attribute *attr,
212 char *buf)
213{
214 struct bonding *bond = to_bond(d);
215 const struct bond_opt_value *val;
216
217 val = bond_opt_get_val(BOND_OPT_XMIT_HASH, bond->params.xmit_policy);
218
219 return sysfs_emit(buf, "%s %d\n", val->string, bond->params.xmit_policy);
220}
221static DEVICE_ATTR(xmit_hash_policy, 0644,
222 bonding_show_xmit_hash, bonding_sysfs_store_option);
223
224/* Show arp_validate. */
225static ssize_t bonding_show_arp_validate(struct device *d,
226 struct device_attribute *attr,
227 char *buf)
228{
229 struct bonding *bond = to_bond(d);
230 const struct bond_opt_value *val;
231
232 val = bond_opt_get_val(BOND_OPT_ARP_VALIDATE,
233 bond->params.arp_validate);
234
235 return sysfs_emit(buf, "%s %d\n", val->string, bond->params.arp_validate);
236}
237static DEVICE_ATTR(arp_validate, 0644, bonding_show_arp_validate,
238 bonding_sysfs_store_option);
239
240/* Show arp_all_targets. */
241static ssize_t bonding_show_arp_all_targets(struct device *d,
242 struct device_attribute *attr,
243 char *buf)
244{
245 struct bonding *bond = to_bond(d);
246 const struct bond_opt_value *val;
247
248 val = bond_opt_get_val(BOND_OPT_ARP_ALL_TARGETS,
249 bond->params.arp_all_targets);
250 return sysfs_emit(buf, "%s %d\n",
251 val->string, bond->params.arp_all_targets);
252}
253static DEVICE_ATTR(arp_all_targets, 0644,
254 bonding_show_arp_all_targets, bonding_sysfs_store_option);
255
256/* Show fail_over_mac. */
257static ssize_t bonding_show_fail_over_mac(struct device *d,
258 struct device_attribute *attr,
259 char *buf)
260{
261 struct bonding *bond = to_bond(d);
262 const struct bond_opt_value *val;
263
264 val = bond_opt_get_val(BOND_OPT_FAIL_OVER_MAC,
265 bond->params.fail_over_mac);
266
267 return sysfs_emit(buf, "%s %d\n", val->string, bond->params.fail_over_mac);
268}
269static DEVICE_ATTR(fail_over_mac, 0644,
270 bonding_show_fail_over_mac, bonding_sysfs_store_option);
271
272/* Show the arp timer interval. */
273static ssize_t bonding_show_arp_interval(struct device *d,
274 struct device_attribute *attr,
275 char *buf)
276{
277 struct bonding *bond = to_bond(d);
278
279 return sysfs_emit(buf, "%d\n", bond->params.arp_interval);
280}
281static DEVICE_ATTR(arp_interval, 0644,
282 bonding_show_arp_interval, bonding_sysfs_store_option);
283
284/* Show the arp targets. */
285static ssize_t bonding_show_arp_targets(struct device *d,
286 struct device_attribute *attr,
287 char *buf)
288{
289 struct bonding *bond = to_bond(d);
290 int i, res = 0;
291
292 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
293 if (bond->params.arp_targets[i])
294 res += sysfs_emit_at(buf, res, "%pI4 ",
295 &bond->params.arp_targets[i]);
296 }
297 if (res)
298 buf[res-1] = '\n'; /* eat the leftover space */
299
300 return res;
301}
302static DEVICE_ATTR(arp_ip_target, 0644,
303 bonding_show_arp_targets, bonding_sysfs_store_option);
304
305/* Show the arp missed max. */
306static ssize_t bonding_show_missed_max(struct device *d,
307 struct device_attribute *attr,
308 char *buf)
309{
310 struct bonding *bond = to_bond(d);
311
312 return sysfs_emit(buf, "%u\n", bond->params.missed_max);
313}
314static DEVICE_ATTR(arp_missed_max, 0644,
315 bonding_show_missed_max, bonding_sysfs_store_option);
316
317/* Show the up and down delays. */
318static ssize_t bonding_show_downdelay(struct device *d,
319 struct device_attribute *attr,
320 char *buf)
321{
322 struct bonding *bond = to_bond(d);
323
324 return sysfs_emit(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
325}
326static DEVICE_ATTR(downdelay, 0644,
327 bonding_show_downdelay, bonding_sysfs_store_option);
328
329static ssize_t bonding_show_updelay(struct device *d,
330 struct device_attribute *attr,
331 char *buf)
332{
333 struct bonding *bond = to_bond(d);
334
335 return sysfs_emit(buf, "%d\n", bond->params.updelay * bond->params.miimon);
336
337}
338static DEVICE_ATTR(updelay, 0644,
339 bonding_show_updelay, bonding_sysfs_store_option);
340
341static ssize_t bonding_show_peer_notif_delay(struct device *d,
342 struct device_attribute *attr,
343 char *buf)
344{
345 struct bonding *bond = to_bond(d);
346
347 return sysfs_emit(buf, "%d\n",
348 bond->params.peer_notif_delay * bond->params.miimon);
349}
350static DEVICE_ATTR(peer_notif_delay, 0644,
351 bonding_show_peer_notif_delay, bonding_sysfs_store_option);
352
353/* Show the LACP activity and interval. */
354static ssize_t bonding_show_lacp_active(struct device *d,
355 struct device_attribute *attr,
356 char *buf)
357{
358 struct bonding *bond = to_bond(d);
359 const struct bond_opt_value *val;
360
361 val = bond_opt_get_val(BOND_OPT_LACP_ACTIVE, bond->params.lacp_active);
362
363 return sysfs_emit(buf, "%s %d\n", val->string, bond->params.lacp_active);
364}
365static DEVICE_ATTR(lacp_active, 0644,
366 bonding_show_lacp_active, bonding_sysfs_store_option);
367
368static ssize_t bonding_show_lacp_rate(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_LACP_RATE, bond->params.lacp_fast);
376
377 return sysfs_emit(buf, "%s %d\n", val->string, bond->params.lacp_fast);
378}
379static DEVICE_ATTR(lacp_rate, 0644,
380 bonding_show_lacp_rate, bonding_sysfs_store_option);
381
382static ssize_t bonding_show_min_links(struct device *d,
383 struct device_attribute *attr,
384 char *buf)
385{
386 struct bonding *bond = to_bond(d);
387
388 return sysfs_emit(buf, "%u\n", bond->params.min_links);
389}
390static DEVICE_ATTR(min_links, 0644,
391 bonding_show_min_links, bonding_sysfs_store_option);
392
393static ssize_t bonding_show_ad_select(struct device *d,
394 struct device_attribute *attr,
395 char *buf)
396{
397 struct bonding *bond = to_bond(d);
398 const struct bond_opt_value *val;
399
400 val = bond_opt_get_val(BOND_OPT_AD_SELECT, bond->params.ad_select);
401
402 return sysfs_emit(buf, "%s %d\n", val->string, bond->params.ad_select);
403}
404static DEVICE_ATTR(ad_select, 0644,
405 bonding_show_ad_select, bonding_sysfs_store_option);
406
407/* Show the number of peer notifications to send after a failover event. */
408static ssize_t bonding_show_num_peer_notif(struct device *d,
409 struct device_attribute *attr,
410 char *buf)
411{
412 struct bonding *bond = to_bond(d);
413
414 return sysfs_emit(buf, "%d\n", bond->params.num_peer_notif);
415}
416static DEVICE_ATTR(num_grat_arp, 0644,
417 bonding_show_num_peer_notif, bonding_sysfs_store_option);
418static DEVICE_ATTR(num_unsol_na, 0644,
419 bonding_show_num_peer_notif, bonding_sysfs_store_option);
420
421/* Show the MII monitor interval. */
422static ssize_t bonding_show_miimon(struct device *d,
423 struct device_attribute *attr,
424 char *buf)
425{
426 struct bonding *bond = to_bond(d);
427
428 return sysfs_emit(buf, "%d\n", bond->params.miimon);
429}
430static DEVICE_ATTR(miimon, 0644,
431 bonding_show_miimon, bonding_sysfs_store_option);
432
433/* Show the primary slave. */
434static ssize_t bonding_show_primary(struct device *d,
435 struct device_attribute *attr,
436 char *buf)
437{
438 struct bonding *bond = to_bond(d);
439 struct slave *primary;
440 int count = 0;
441
442 rcu_read_lock();
443 primary = rcu_dereference(bond->primary_slave);
444 if (primary)
445 count = sysfs_emit(buf, "%s\n", primary->dev->name);
446 rcu_read_unlock();
447
448 return count;
449}
450static DEVICE_ATTR(primary, 0644,
451 bonding_show_primary, bonding_sysfs_store_option);
452
453/* Show the primary_reselect flag. */
454static ssize_t bonding_show_primary_reselect(struct device *d,
455 struct device_attribute *attr,
456 char *buf)
457{
458 struct bonding *bond = to_bond(d);
459 const struct bond_opt_value *val;
460
461 val = bond_opt_get_val(BOND_OPT_PRIMARY_RESELECT,
462 bond->params.primary_reselect);
463
464 return sysfs_emit(buf, "%s %d\n",
465 val->string, bond->params.primary_reselect);
466}
467static DEVICE_ATTR(primary_reselect, 0644,
468 bonding_show_primary_reselect, bonding_sysfs_store_option);
469
470/* Show the use_carrier flag. */
471static ssize_t bonding_show_carrier(struct device *d,
472 struct device_attribute *attr,
473 char *buf)
474{
475 struct bonding *bond = to_bond(d);
476
477 return sysfs_emit(buf, "%d\n", bond->params.use_carrier);
478}
479static DEVICE_ATTR(use_carrier, 0644,
480 bonding_show_carrier, bonding_sysfs_store_option);
481
482
483/* Show currently active_slave. */
484static ssize_t bonding_show_active_slave(struct device *d,
485 struct device_attribute *attr,
486 char *buf)
487{
488 struct bonding *bond = to_bond(d);
489 struct net_device *slave_dev;
490 int count = 0;
491
492 rcu_read_lock();
493 slave_dev = bond_option_active_slave_get_rcu(bond);
494 if (slave_dev)
495 count = sysfs_emit(buf, "%s\n", slave_dev->name);
496 rcu_read_unlock();
497
498 return count;
499}
500static DEVICE_ATTR(active_slave, 0644,
501 bonding_show_active_slave, bonding_sysfs_store_option);
502
503/* Show link status of the bond interface. */
504static ssize_t bonding_show_mii_status(struct device *d,
505 struct device_attribute *attr,
506 char *buf)
507{
508 struct bonding *bond = to_bond(d);
509 bool active = netif_carrier_ok(bond->dev);
510
511 return sysfs_emit(buf, "%s\n", active ? "up" : "down");
512}
513static DEVICE_ATTR(mii_status, 0444, bonding_show_mii_status, NULL);
514
515/* Show current 802.3ad aggregator ID. */
516static ssize_t bonding_show_ad_aggregator(struct device *d,
517 struct device_attribute *attr,
518 char *buf)
519{
520 int count = 0;
521 struct bonding *bond = to_bond(d);
522
523 if (BOND_MODE(bond) == BOND_MODE_8023AD) {
524 struct ad_info ad_info;
525
526 count = sysfs_emit(buf, "%d\n",
527 bond_3ad_get_active_agg_info(bond, &ad_info)
528 ? 0 : ad_info.aggregator_id);
529 }
530
531 return count;
532}
533static DEVICE_ATTR(ad_aggregator, 0444, bonding_show_ad_aggregator, NULL);
534
535
536/* Show number of active 802.3ad ports. */
537static ssize_t bonding_show_ad_num_ports(struct device *d,
538 struct device_attribute *attr,
539 char *buf)
540{
541 int count = 0;
542 struct bonding *bond = to_bond(d);
543
544 if (BOND_MODE(bond) == BOND_MODE_8023AD) {
545 struct ad_info ad_info;
546
547 count = sysfs_emit(buf, "%d\n",
548 bond_3ad_get_active_agg_info(bond, &ad_info)
549 ? 0 : ad_info.ports);
550 }
551
552 return count;
553}
554static DEVICE_ATTR(ad_num_ports, 0444, bonding_show_ad_num_ports, NULL);
555
556
557/* Show current 802.3ad actor key. */
558static ssize_t bonding_show_ad_actor_key(struct device *d,
559 struct device_attribute *attr,
560 char *buf)
561{
562 int count = 0;
563 struct bonding *bond = to_bond(d);
564
565 if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN)) {
566 struct ad_info ad_info;
567
568 count = sysfs_emit(buf, "%d\n",
569 bond_3ad_get_active_agg_info(bond, &ad_info)
570 ? 0 : ad_info.actor_key);
571 }
572
573 return count;
574}
575static DEVICE_ATTR(ad_actor_key, 0444, bonding_show_ad_actor_key, NULL);
576
577
578/* Show current 802.3ad partner key. */
579static ssize_t bonding_show_ad_partner_key(struct device *d,
580 struct device_attribute *attr,
581 char *buf)
582{
583 int count = 0;
584 struct bonding *bond = to_bond(d);
585
586 if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN)) {
587 struct ad_info ad_info;
588
589 count = sysfs_emit(buf, "%d\n",
590 bond_3ad_get_active_agg_info(bond, &ad_info)
591 ? 0 : ad_info.partner_key);
592 }
593
594 return count;
595}
596static DEVICE_ATTR(ad_partner_key, 0444, bonding_show_ad_partner_key, NULL);
597
598
599/* Show current 802.3ad partner mac. */
600static ssize_t bonding_show_ad_partner_mac(struct device *d,
601 struct device_attribute *attr,
602 char *buf)
603{
604 int count = 0;
605 struct bonding *bond = to_bond(d);
606
607 if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN)) {
608 struct ad_info ad_info;
609
610 if (!bond_3ad_get_active_agg_info(bond, &ad_info))
611 count = sysfs_emit(buf, "%pM\n", ad_info.partner_system);
612 }
613
614 return count;
615}
616static DEVICE_ATTR(ad_partner_mac, 0444, bonding_show_ad_partner_mac, NULL);
617
618/* Show the queue_ids of the slaves in the current bond. */
619static ssize_t bonding_show_queue_id(struct device *d,
620 struct device_attribute *attr,
621 char *buf)
622{
623 struct bonding *bond = to_bond(d);
624 struct list_head *iter;
625 struct slave *slave;
626 int res = 0;
627
628 rcu_read_lock();
629
630 bond_for_each_slave_rcu(bond, slave, iter) {
631 if (res > (PAGE_SIZE - IFNAMSIZ - 6)) {
632 /* not enough space for another interface_name:queue_id pair */
633 if ((PAGE_SIZE - res) > 10)
634 res = PAGE_SIZE - 10;
635 res += sysfs_emit_at(buf, res, "++more++ ");
636 break;
637 }
638 res += sysfs_emit_at(buf, res, "%s:%d ",
639 slave->dev->name,
640 READ_ONCE(slave->queue_id));
641 }
642 if (res)
643 buf[res-1] = '\n'; /* eat the leftover space */
644
645 rcu_read_unlock();
646
647 return res;
648}
649static DEVICE_ATTR(queue_id, 0644, bonding_show_queue_id,
650 bonding_sysfs_store_option);
651
652
653/* Show the all_slaves_active flag. */
654static ssize_t bonding_show_slaves_active(struct device *d,
655 struct device_attribute *attr,
656 char *buf)
657{
658 struct bonding *bond = to_bond(d);
659
660 return sysfs_emit(buf, "%d\n", bond->params.all_slaves_active);
661}
662static DEVICE_ATTR(all_slaves_active, 0644,
663 bonding_show_slaves_active, bonding_sysfs_store_option);
664
665/* Show the number of IGMP membership reports to send on link failure */
666static ssize_t bonding_show_resend_igmp(struct device *d,
667 struct device_attribute *attr,
668 char *buf)
669{
670 struct bonding *bond = to_bond(d);
671
672 return sysfs_emit(buf, "%d\n", bond->params.resend_igmp);
673}
674static DEVICE_ATTR(resend_igmp, 0644,
675 bonding_show_resend_igmp, bonding_sysfs_store_option);
676
677
678static ssize_t bonding_show_lp_interval(struct device *d,
679 struct device_attribute *attr,
680 char *buf)
681{
682 struct bonding *bond = to_bond(d);
683
684 return sysfs_emit(buf, "%d\n", bond->params.lp_interval);
685}
686static DEVICE_ATTR(lp_interval, 0644,
687 bonding_show_lp_interval, bonding_sysfs_store_option);
688
689static ssize_t bonding_show_tlb_dynamic_lb(struct device *d,
690 struct device_attribute *attr,
691 char *buf)
692{
693 struct bonding *bond = to_bond(d);
694
695 return sysfs_emit(buf, "%d\n", bond->params.tlb_dynamic_lb);
696}
697static DEVICE_ATTR(tlb_dynamic_lb, 0644,
698 bonding_show_tlb_dynamic_lb, bonding_sysfs_store_option);
699
700static ssize_t bonding_show_packets_per_slave(struct device *d,
701 struct device_attribute *attr,
702 char *buf)
703{
704 struct bonding *bond = to_bond(d);
705 unsigned int packets_per_slave = bond->params.packets_per_slave;
706
707 return sysfs_emit(buf, "%u\n", packets_per_slave);
708}
709static DEVICE_ATTR(packets_per_slave, 0644,
710 bonding_show_packets_per_slave, bonding_sysfs_store_option);
711
712static ssize_t bonding_show_ad_actor_sys_prio(struct device *d,
713 struct device_attribute *attr,
714 char *buf)
715{
716 struct bonding *bond = to_bond(d);
717
718 if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN))
719 return sysfs_emit(buf, "%hu\n", bond->params.ad_actor_sys_prio);
720
721 return 0;
722}
723static DEVICE_ATTR(ad_actor_sys_prio, 0644,
724 bonding_show_ad_actor_sys_prio, bonding_sysfs_store_option);
725
726static ssize_t bonding_show_ad_actor_system(struct device *d,
727 struct device_attribute *attr,
728 char *buf)
729{
730 struct bonding *bond = to_bond(d);
731
732 if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN))
733 return sysfs_emit(buf, "%pM\n", bond->params.ad_actor_system);
734
735 return 0;
736}
737
738static DEVICE_ATTR(ad_actor_system, 0644,
739 bonding_show_ad_actor_system, bonding_sysfs_store_option);
740
741static ssize_t bonding_show_ad_user_port_key(struct device *d,
742 struct device_attribute *attr,
743 char *buf)
744{
745 struct bonding *bond = to_bond(d);
746
747 if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN))
748 return sysfs_emit(buf, "%hu\n", bond->params.ad_user_port_key);
749
750 return 0;
751}
752static DEVICE_ATTR(ad_user_port_key, 0644,
753 bonding_show_ad_user_port_key, bonding_sysfs_store_option);
754
755static struct attribute *per_bond_attrs[] = {
756 &dev_attr_slaves.attr,
757 &dev_attr_mode.attr,
758 &dev_attr_fail_over_mac.attr,
759 &dev_attr_arp_validate.attr,
760 &dev_attr_arp_all_targets.attr,
761 &dev_attr_arp_interval.attr,
762 &dev_attr_arp_ip_target.attr,
763 &dev_attr_downdelay.attr,
764 &dev_attr_updelay.attr,
765 &dev_attr_peer_notif_delay.attr,
766 &dev_attr_lacp_active.attr,
767 &dev_attr_lacp_rate.attr,
768 &dev_attr_ad_select.attr,
769 &dev_attr_xmit_hash_policy.attr,
770 &dev_attr_num_grat_arp.attr,
771 &dev_attr_num_unsol_na.attr,
772 &dev_attr_miimon.attr,
773 &dev_attr_primary.attr,
774 &dev_attr_primary_reselect.attr,
775 &dev_attr_use_carrier.attr,
776 &dev_attr_active_slave.attr,
777 &dev_attr_mii_status.attr,
778 &dev_attr_ad_aggregator.attr,
779 &dev_attr_ad_num_ports.attr,
780 &dev_attr_ad_actor_key.attr,
781 &dev_attr_ad_partner_key.attr,
782 &dev_attr_ad_partner_mac.attr,
783 &dev_attr_queue_id.attr,
784 &dev_attr_all_slaves_active.attr,
785 &dev_attr_resend_igmp.attr,
786 &dev_attr_min_links.attr,
787 &dev_attr_lp_interval.attr,
788 &dev_attr_packets_per_slave.attr,
789 &dev_attr_tlb_dynamic_lb.attr,
790 &dev_attr_ad_actor_sys_prio.attr,
791 &dev_attr_ad_actor_system.attr,
792 &dev_attr_ad_user_port_key.attr,
793 &dev_attr_arp_missed_max.attr,
794 NULL,
795};
796
797static const struct attribute_group bonding_group = {
798 .name = "bonding",
799 .attrs = per_bond_attrs,
800};
801
802/* Initialize sysfs. This sets up the bonding_masters file in
803 * /sys/class/net.
804 */
805int __net_init bond_create_sysfs(struct bond_net *bn)
806{
807 int ret;
808
809 bn->class_attr_bonding_masters = class_attr_bonding_masters;
810 sysfs_attr_init(&bn->class_attr_bonding_masters.attr);
811
812 ret = netdev_class_create_file_ns(&bn->class_attr_bonding_masters,
813 bn->net);
814 /* Permit multiple loads of the module by ignoring failures to
815 * create the bonding_masters sysfs file. Bonding devices
816 * created by second or subsequent loads of the module will
817 * not be listed in, or controllable by, bonding_masters, but
818 * will have the usual "bonding" sysfs directory.
819 *
820 * This is done to preserve backwards compatibility for
821 * initscripts/sysconfig, which load bonding multiple times to
822 * configure multiple bonding devices.
823 */
824 if (ret == -EEXIST) {
825 /* Is someone being kinky and naming a device bonding_master? */
826 if (netdev_name_in_use(bn->net,
827 class_attr_bonding_masters.attr.name))
828 pr_err("network device named %s already exists in sysfs\n",
829 class_attr_bonding_masters.attr.name);
830 ret = 0;
831 }
832
833 return ret;
834
835}
836
837/* Remove /sys/class/net/bonding_masters. */
838void __net_exit bond_destroy_sysfs(struct bond_net *bn)
839{
840 netdev_class_remove_file_ns(&bn->class_attr_bonding_masters, bn->net);
841}
842
843/* Initialize sysfs for each bond. This sets up and registers
844 * the 'bondctl' directory for each individual bond under /sys/class/net.
845 */
846void bond_prepare_sysfs_group(struct bonding *bond)
847{
848 bond->dev->sysfs_groups[0] = &bonding_group;
849}
850