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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 int res = 0;
41 struct bonding *bond;
42
43 rtnl_lock();
44
45 list_for_each_entry(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 rtnl_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 if (!rtnl_trylock())
174 return restart_syscall();
175
176 bond_for_each_slave(bond, slave, iter) {
177 if (res > (PAGE_SIZE - IFNAMSIZ)) {
178 /* not enough space for another interface name */
179 if ((PAGE_SIZE - res) > 10)
180 res = PAGE_SIZE - 10;
181 res += sysfs_emit_at(buf, res, "++more++ ");
182 break;
183 }
184 res += sysfs_emit_at(buf, res, "%s ", slave->dev->name);
185 }
186
187 rtnl_unlock();
188
189 if (res)
190 buf[res-1] = '\n'; /* eat the leftover space */
191
192 return res;
193}
194static DEVICE_ATTR(slaves, 0644, bonding_show_slaves,
195 bonding_sysfs_store_option);
196
197/* Show the bonding mode. */
198static ssize_t bonding_show_mode(struct device *d,
199 struct device_attribute *attr, char *buf)
200{
201 struct bonding *bond = to_bond(d);
202 const struct bond_opt_value *val;
203
204 val = bond_opt_get_val(BOND_OPT_MODE, BOND_MODE(bond));
205
206 return sysfs_emit(buf, "%s %d\n", val->string, BOND_MODE(bond));
207}
208static DEVICE_ATTR(mode, 0644, bonding_show_mode, bonding_sysfs_store_option);
209
210/* Show the bonding transmit hash method. */
211static ssize_t bonding_show_xmit_hash(struct device *d,
212 struct device_attribute *attr,
213 char *buf)
214{
215 struct bonding *bond = to_bond(d);
216 const struct bond_opt_value *val;
217
218 val = bond_opt_get_val(BOND_OPT_XMIT_HASH, bond->params.xmit_policy);
219
220 return sysfs_emit(buf, "%s %d\n", val->string, bond->params.xmit_policy);
221}
222static DEVICE_ATTR(xmit_hash_policy, 0644,
223 bonding_show_xmit_hash, bonding_sysfs_store_option);
224
225/* Show arp_validate. */
226static ssize_t bonding_show_arp_validate(struct device *d,
227 struct device_attribute *attr,
228 char *buf)
229{
230 struct bonding *bond = to_bond(d);
231 const struct bond_opt_value *val;
232
233 val = bond_opt_get_val(BOND_OPT_ARP_VALIDATE,
234 bond->params.arp_validate);
235
236 return sysfs_emit(buf, "%s %d\n", val->string, bond->params.arp_validate);
237}
238static DEVICE_ATTR(arp_validate, 0644, bonding_show_arp_validate,
239 bonding_sysfs_store_option);
240
241/* Show arp_all_targets. */
242static ssize_t bonding_show_arp_all_targets(struct device *d,
243 struct device_attribute *attr,
244 char *buf)
245{
246 struct bonding *bond = to_bond(d);
247 const struct bond_opt_value *val;
248
249 val = bond_opt_get_val(BOND_OPT_ARP_ALL_TARGETS,
250 bond->params.arp_all_targets);
251 return sysfs_emit(buf, "%s %d\n",
252 val->string, bond->params.arp_all_targets);
253}
254static DEVICE_ATTR(arp_all_targets, 0644,
255 bonding_show_arp_all_targets, bonding_sysfs_store_option);
256
257/* Show fail_over_mac. */
258static ssize_t bonding_show_fail_over_mac(struct device *d,
259 struct device_attribute *attr,
260 char *buf)
261{
262 struct bonding *bond = to_bond(d);
263 const struct bond_opt_value *val;
264
265 val = bond_opt_get_val(BOND_OPT_FAIL_OVER_MAC,
266 bond->params.fail_over_mac);
267
268 return sysfs_emit(buf, "%s %d\n", val->string, bond->params.fail_over_mac);
269}
270static DEVICE_ATTR(fail_over_mac, 0644,
271 bonding_show_fail_over_mac, bonding_sysfs_store_option);
272
273/* Show the arp timer interval. */
274static ssize_t bonding_show_arp_interval(struct device *d,
275 struct device_attribute *attr,
276 char *buf)
277{
278 struct bonding *bond = to_bond(d);
279
280 return sysfs_emit(buf, "%d\n", bond->params.arp_interval);
281}
282static DEVICE_ATTR(arp_interval, 0644,
283 bonding_show_arp_interval, bonding_sysfs_store_option);
284
285/* Show the arp targets. */
286static ssize_t bonding_show_arp_targets(struct device *d,
287 struct device_attribute *attr,
288 char *buf)
289{
290 struct bonding *bond = to_bond(d);
291 int i, res = 0;
292
293 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
294 if (bond->params.arp_targets[i])
295 res += sysfs_emit_at(buf, res, "%pI4 ",
296 &bond->params.arp_targets[i]);
297 }
298 if (res)
299 buf[res-1] = '\n'; /* eat the leftover space */
300
301 return res;
302}
303static DEVICE_ATTR(arp_ip_target, 0644,
304 bonding_show_arp_targets, bonding_sysfs_store_option);
305
306/* Show the arp missed max. */
307static ssize_t bonding_show_missed_max(struct device *d,
308 struct device_attribute *attr,
309 char *buf)
310{
311 struct bonding *bond = to_bond(d);
312
313 return sysfs_emit(buf, "%u\n", bond->params.missed_max);
314}
315static DEVICE_ATTR(arp_missed_max, 0644,
316 bonding_show_missed_max, 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 sysfs_emit(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
326}
327static DEVICE_ATTR(downdelay, 0644,
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 sysfs_emit(buf, "%d\n", bond->params.updelay * bond->params.miimon);
337
338}
339static DEVICE_ATTR(updelay, 0644,
340 bonding_show_updelay, bonding_sysfs_store_option);
341
342static ssize_t bonding_show_peer_notif_delay(struct device *d,
343 struct device_attribute *attr,
344 char *buf)
345{
346 struct bonding *bond = to_bond(d);
347
348 return sysfs_emit(buf, "%d\n",
349 bond->params.peer_notif_delay * bond->params.miimon);
350}
351static DEVICE_ATTR(peer_notif_delay, 0644,
352 bonding_show_peer_notif_delay, bonding_sysfs_store_option);
353
354/* Show the LACP activity and interval. */
355static ssize_t bonding_show_lacp_active(struct device *d,
356 struct device_attribute *attr,
357 char *buf)
358{
359 struct bonding *bond = to_bond(d);
360 const struct bond_opt_value *val;
361
362 val = bond_opt_get_val(BOND_OPT_LACP_ACTIVE, bond->params.lacp_active);
363
364 return sysfs_emit(buf, "%s %d\n", val->string, bond->params.lacp_active);
365}
366static DEVICE_ATTR(lacp_active, 0644,
367 bonding_show_lacp_active, bonding_sysfs_store_option);
368
369static ssize_t bonding_show_lacp_rate(struct device *d,
370 struct device_attribute *attr,
371 char *buf)
372{
373 struct bonding *bond = to_bond(d);
374 const struct bond_opt_value *val;
375
376 val = bond_opt_get_val(BOND_OPT_LACP_RATE, bond->params.lacp_fast);
377
378 return sysfs_emit(buf, "%s %d\n", val->string, bond->params.lacp_fast);
379}
380static DEVICE_ATTR(lacp_rate, 0644,
381 bonding_show_lacp_rate, bonding_sysfs_store_option);
382
383static ssize_t bonding_show_min_links(struct device *d,
384 struct device_attribute *attr,
385 char *buf)
386{
387 struct bonding *bond = to_bond(d);
388
389 return sysfs_emit(buf, "%u\n", bond->params.min_links);
390}
391static DEVICE_ATTR(min_links, 0644,
392 bonding_show_min_links, bonding_sysfs_store_option);
393
394static ssize_t bonding_show_ad_select(struct device *d,
395 struct device_attribute *attr,
396 char *buf)
397{
398 struct bonding *bond = to_bond(d);
399 const struct bond_opt_value *val;
400
401 val = bond_opt_get_val(BOND_OPT_AD_SELECT, bond->params.ad_select);
402
403 return sysfs_emit(buf, "%s %d\n", val->string, bond->params.ad_select);
404}
405static DEVICE_ATTR(ad_select, 0644,
406 bonding_show_ad_select, bonding_sysfs_store_option);
407
408/* Show the number of peer notifications to send after a failover event. */
409static ssize_t bonding_show_num_peer_notif(struct device *d,
410 struct device_attribute *attr,
411 char *buf)
412{
413 struct bonding *bond = to_bond(d);
414
415 return sysfs_emit(buf, "%d\n", bond->params.num_peer_notif);
416}
417static DEVICE_ATTR(num_grat_arp, 0644,
418 bonding_show_num_peer_notif, bonding_sysfs_store_option);
419static DEVICE_ATTR(num_unsol_na, 0644,
420 bonding_show_num_peer_notif, bonding_sysfs_store_option);
421
422/* Show the MII monitor interval. */
423static ssize_t bonding_show_miimon(struct device *d,
424 struct device_attribute *attr,
425 char *buf)
426{
427 struct bonding *bond = to_bond(d);
428
429 return sysfs_emit(buf, "%d\n", bond->params.miimon);
430}
431static DEVICE_ATTR(miimon, 0644,
432 bonding_show_miimon, bonding_sysfs_store_option);
433
434/* Show the primary slave. */
435static ssize_t bonding_show_primary(struct device *d,
436 struct device_attribute *attr,
437 char *buf)
438{
439 struct bonding *bond = to_bond(d);
440 struct slave *primary;
441 int count = 0;
442
443 rcu_read_lock();
444 primary = rcu_dereference(bond->primary_slave);
445 if (primary)
446 count = sysfs_emit(buf, "%s\n", primary->dev->name);
447 rcu_read_unlock();
448
449 return count;
450}
451static DEVICE_ATTR(primary, 0644,
452 bonding_show_primary, bonding_sysfs_store_option);
453
454/* Show the primary_reselect flag. */
455static ssize_t bonding_show_primary_reselect(struct device *d,
456 struct device_attribute *attr,
457 char *buf)
458{
459 struct bonding *bond = to_bond(d);
460 const struct bond_opt_value *val;
461
462 val = bond_opt_get_val(BOND_OPT_PRIMARY_RESELECT,
463 bond->params.primary_reselect);
464
465 return sysfs_emit(buf, "%s %d\n",
466 val->string, bond->params.primary_reselect);
467}
468static DEVICE_ATTR(primary_reselect, 0644,
469 bonding_show_primary_reselect, bonding_sysfs_store_option);
470
471/* Show the use_carrier flag. */
472static ssize_t bonding_show_carrier(struct device *d,
473 struct device_attribute *attr,
474 char *buf)
475{
476 struct bonding *bond = to_bond(d);
477
478 return sysfs_emit(buf, "%d\n", bond->params.use_carrier);
479}
480static DEVICE_ATTR(use_carrier, 0644,
481 bonding_show_carrier, bonding_sysfs_store_option);
482
483
484/* Show currently active_slave. */
485static ssize_t bonding_show_active_slave(struct device *d,
486 struct device_attribute *attr,
487 char *buf)
488{
489 struct bonding *bond = to_bond(d);
490 struct net_device *slave_dev;
491 int count = 0;
492
493 rcu_read_lock();
494 slave_dev = bond_option_active_slave_get_rcu(bond);
495 if (slave_dev)
496 count = sysfs_emit(buf, "%s\n", slave_dev->name);
497 rcu_read_unlock();
498
499 return count;
500}
501static DEVICE_ATTR(active_slave, 0644,
502 bonding_show_active_slave, bonding_sysfs_store_option);
503
504/* Show link status of the bond interface. */
505static ssize_t bonding_show_mii_status(struct device *d,
506 struct device_attribute *attr,
507 char *buf)
508{
509 struct bonding *bond = to_bond(d);
510 bool active = netif_carrier_ok(bond->dev);
511
512 return sysfs_emit(buf, "%s\n", active ? "up" : "down");
513}
514static DEVICE_ATTR(mii_status, 0444, bonding_show_mii_status, NULL);
515
516/* Show current 802.3ad aggregator ID. */
517static ssize_t bonding_show_ad_aggregator(struct device *d,
518 struct device_attribute *attr,
519 char *buf)
520{
521 int count = 0;
522 struct bonding *bond = to_bond(d);
523
524 if (BOND_MODE(bond) == BOND_MODE_8023AD) {
525 struct ad_info ad_info;
526
527 count = sysfs_emit(buf, "%d\n",
528 bond_3ad_get_active_agg_info(bond, &ad_info)
529 ? 0 : ad_info.aggregator_id);
530 }
531
532 return count;
533}
534static DEVICE_ATTR(ad_aggregator, 0444, bonding_show_ad_aggregator, NULL);
535
536
537/* Show number of active 802.3ad ports. */
538static ssize_t bonding_show_ad_num_ports(struct device *d,
539 struct device_attribute *attr,
540 char *buf)
541{
542 int count = 0;
543 struct bonding *bond = to_bond(d);
544
545 if (BOND_MODE(bond) == BOND_MODE_8023AD) {
546 struct ad_info ad_info;
547
548 count = sysfs_emit(buf, "%d\n",
549 bond_3ad_get_active_agg_info(bond, &ad_info)
550 ? 0 : ad_info.ports);
551 }
552
553 return count;
554}
555static DEVICE_ATTR(ad_num_ports, 0444, bonding_show_ad_num_ports, NULL);
556
557
558/* Show current 802.3ad actor key. */
559static ssize_t bonding_show_ad_actor_key(struct device *d,
560 struct device_attribute *attr,
561 char *buf)
562{
563 int count = 0;
564 struct bonding *bond = to_bond(d);
565
566 if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN)) {
567 struct ad_info ad_info;
568
569 count = sysfs_emit(buf, "%d\n",
570 bond_3ad_get_active_agg_info(bond, &ad_info)
571 ? 0 : ad_info.actor_key);
572 }
573
574 return count;
575}
576static DEVICE_ATTR(ad_actor_key, 0444, bonding_show_ad_actor_key, NULL);
577
578
579/* Show current 802.3ad partner key. */
580static ssize_t bonding_show_ad_partner_key(struct device *d,
581 struct device_attribute *attr,
582 char *buf)
583{
584 int count = 0;
585 struct bonding *bond = to_bond(d);
586
587 if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN)) {
588 struct ad_info ad_info;
589
590 count = sysfs_emit(buf, "%d\n",
591 bond_3ad_get_active_agg_info(bond, &ad_info)
592 ? 0 : ad_info.partner_key);
593 }
594
595 return count;
596}
597static DEVICE_ATTR(ad_partner_key, 0444, bonding_show_ad_partner_key, NULL);
598
599
600/* Show current 802.3ad partner mac. */
601static ssize_t bonding_show_ad_partner_mac(struct device *d,
602 struct device_attribute *attr,
603 char *buf)
604{
605 int count = 0;
606 struct bonding *bond = to_bond(d);
607
608 if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN)) {
609 struct ad_info ad_info;
610
611 if (!bond_3ad_get_active_agg_info(bond, &ad_info))
612 count = sysfs_emit(buf, "%pM\n", ad_info.partner_system);
613 }
614
615 return count;
616}
617static DEVICE_ATTR(ad_partner_mac, 0444, bonding_show_ad_partner_mac, NULL);
618
619/* Show the queue_ids of the slaves in the current bond. */
620static ssize_t bonding_show_queue_id(struct device *d,
621 struct device_attribute *attr,
622 char *buf)
623{
624 struct bonding *bond = to_bond(d);
625 struct list_head *iter;
626 struct slave *slave;
627 int res = 0;
628
629 if (!rtnl_trylock())
630 return restart_syscall();
631
632 bond_for_each_slave(bond, slave, iter) {
633 if (res > (PAGE_SIZE - IFNAMSIZ - 6)) {
634 /* not enough space for another interface_name:queue_id pair */
635 if ((PAGE_SIZE - res) > 10)
636 res = PAGE_SIZE - 10;
637 res += sysfs_emit_at(buf, res, "++more++ ");
638 break;
639 }
640 res += sysfs_emit_at(buf, res, "%s:%d ",
641 slave->dev->name, slave->queue_id);
642 }
643 if (res)
644 buf[res-1] = '\n'; /* eat the leftover space */
645
646 rtnl_unlock();
647
648 return res;
649}
650static DEVICE_ATTR(queue_id, 0644, bonding_show_queue_id,
651 bonding_sysfs_store_option);
652
653
654/* Show the all_slaves_active flag. */
655static ssize_t bonding_show_slaves_active(struct device *d,
656 struct device_attribute *attr,
657 char *buf)
658{
659 struct bonding *bond = to_bond(d);
660
661 return sysfs_emit(buf, "%d\n", bond->params.all_slaves_active);
662}
663static DEVICE_ATTR(all_slaves_active, 0644,
664 bonding_show_slaves_active, bonding_sysfs_store_option);
665
666/* Show the number of IGMP membership reports to send on link failure */
667static ssize_t bonding_show_resend_igmp(struct device *d,
668 struct device_attribute *attr,
669 char *buf)
670{
671 struct bonding *bond = to_bond(d);
672
673 return sysfs_emit(buf, "%d\n", bond->params.resend_igmp);
674}
675static DEVICE_ATTR(resend_igmp, 0644,
676 bonding_show_resend_igmp, bonding_sysfs_store_option);
677
678
679static ssize_t bonding_show_lp_interval(struct device *d,
680 struct device_attribute *attr,
681 char *buf)
682{
683 struct bonding *bond = to_bond(d);
684
685 return sysfs_emit(buf, "%d\n", bond->params.lp_interval);
686}
687static DEVICE_ATTR(lp_interval, 0644,
688 bonding_show_lp_interval, bonding_sysfs_store_option);
689
690static ssize_t bonding_show_tlb_dynamic_lb(struct device *d,
691 struct device_attribute *attr,
692 char *buf)
693{
694 struct bonding *bond = to_bond(d);
695
696 return sysfs_emit(buf, "%d\n", bond->params.tlb_dynamic_lb);
697}
698static DEVICE_ATTR(tlb_dynamic_lb, 0644,
699 bonding_show_tlb_dynamic_lb, bonding_sysfs_store_option);
700
701static ssize_t bonding_show_packets_per_slave(struct device *d,
702 struct device_attribute *attr,
703 char *buf)
704{
705 struct bonding *bond = to_bond(d);
706 unsigned int packets_per_slave = bond->params.packets_per_slave;
707
708 return sysfs_emit(buf, "%u\n", packets_per_slave);
709}
710static DEVICE_ATTR(packets_per_slave, 0644,
711 bonding_show_packets_per_slave, bonding_sysfs_store_option);
712
713static ssize_t bonding_show_ad_actor_sys_prio(struct device *d,
714 struct device_attribute *attr,
715 char *buf)
716{
717 struct bonding *bond = to_bond(d);
718
719 if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN))
720 return sysfs_emit(buf, "%hu\n", bond->params.ad_actor_sys_prio);
721
722 return 0;
723}
724static DEVICE_ATTR(ad_actor_sys_prio, 0644,
725 bonding_show_ad_actor_sys_prio, bonding_sysfs_store_option);
726
727static ssize_t bonding_show_ad_actor_system(struct device *d,
728 struct device_attribute *attr,
729 char *buf)
730{
731 struct bonding *bond = to_bond(d);
732
733 if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN))
734 return sysfs_emit(buf, "%pM\n", bond->params.ad_actor_system);
735
736 return 0;
737}
738
739static DEVICE_ATTR(ad_actor_system, 0644,
740 bonding_show_ad_actor_system, bonding_sysfs_store_option);
741
742static ssize_t bonding_show_ad_user_port_key(struct device *d,
743 struct device_attribute *attr,
744 char *buf)
745{
746 struct bonding *bond = to_bond(d);
747
748 if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN))
749 return sysfs_emit(buf, "%hu\n", bond->params.ad_user_port_key);
750
751 return 0;
752}
753static DEVICE_ATTR(ad_user_port_key, 0644,
754 bonding_show_ad_user_port_key, bonding_sysfs_store_option);
755
756static struct attribute *per_bond_attrs[] = {
757 &dev_attr_slaves.attr,
758 &dev_attr_mode.attr,
759 &dev_attr_fail_over_mac.attr,
760 &dev_attr_arp_validate.attr,
761 &dev_attr_arp_all_targets.attr,
762 &dev_attr_arp_interval.attr,
763 &dev_attr_arp_ip_target.attr,
764 &dev_attr_downdelay.attr,
765 &dev_attr_updelay.attr,
766 &dev_attr_peer_notif_delay.attr,
767 &dev_attr_lacp_active.attr,
768 &dev_attr_lacp_rate.attr,
769 &dev_attr_ad_select.attr,
770 &dev_attr_xmit_hash_policy.attr,
771 &dev_attr_num_grat_arp.attr,
772 &dev_attr_num_unsol_na.attr,
773 &dev_attr_miimon.attr,
774 &dev_attr_primary.attr,
775 &dev_attr_primary_reselect.attr,
776 &dev_attr_use_carrier.attr,
777 &dev_attr_active_slave.attr,
778 &dev_attr_mii_status.attr,
779 &dev_attr_ad_aggregator.attr,
780 &dev_attr_ad_num_ports.attr,
781 &dev_attr_ad_actor_key.attr,
782 &dev_attr_ad_partner_key.attr,
783 &dev_attr_ad_partner_mac.attr,
784 &dev_attr_queue_id.attr,
785 &dev_attr_all_slaves_active.attr,
786 &dev_attr_resend_igmp.attr,
787 &dev_attr_min_links.attr,
788 &dev_attr_lp_interval.attr,
789 &dev_attr_packets_per_slave.attr,
790 &dev_attr_tlb_dynamic_lb.attr,
791 &dev_attr_ad_actor_sys_prio.attr,
792 &dev_attr_ad_actor_system.attr,
793 &dev_attr_ad_user_port_key.attr,
794 &dev_attr_arp_missed_max.attr,
795 NULL,
796};
797
798static const struct attribute_group bonding_group = {
799 .name = "bonding",
800 .attrs = per_bond_attrs,
801};
802
803/* Initialize sysfs. This sets up the bonding_masters file in
804 * /sys/class/net.
805 */
806int __net_init bond_create_sysfs(struct bond_net *bn)
807{
808 int ret;
809
810 bn->class_attr_bonding_masters = class_attr_bonding_masters;
811 sysfs_attr_init(&bn->class_attr_bonding_masters.attr);
812
813 ret = netdev_class_create_file_ns(&bn->class_attr_bonding_masters,
814 bn->net);
815 /* Permit multiple loads of the module by ignoring failures to
816 * create the bonding_masters sysfs file. Bonding devices
817 * created by second or subsequent loads of the module will
818 * not be listed in, or controllable by, bonding_masters, but
819 * will have the usual "bonding" sysfs directory.
820 *
821 * This is done to preserve backwards compatibility for
822 * initscripts/sysconfig, which load bonding multiple times to
823 * configure multiple bonding devices.
824 */
825 if (ret == -EEXIST) {
826 /* Is someone being kinky and naming a device bonding_master? */
827 if (netdev_name_in_use(bn->net,
828 class_attr_bonding_masters.attr.name))
829 pr_err("network device named %s already exists in sysfs\n",
830 class_attr_bonding_masters.attr.name);
831 ret = 0;
832 }
833
834 return ret;
835
836}
837
838/* Remove /sys/class/net/bonding_masters. */
839void __net_exit bond_destroy_sysfs(struct bond_net *bn)
840{
841 netdev_class_remove_file_ns(&bn->class_attr_bonding_masters, bn->net);
842}
843
844/* Initialize sysfs for each bond. This sets up and registers
845 * the 'bondctl' directory for each individual bond under /sys/class/net.
846 */
847void bond_prepare_sysfs_group(struct bonding *bond)
848{
849 bond->dev->sysfs_groups[0] = &bonding_group;
850}
851
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