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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 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
1/*
2 * Copyright(c) 2004-2005 Intel Corporation. All rights reserved.
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License as published by the
6 * Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
11 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * for more details.
13 *
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, see <http://www.gnu.org/licenses/>.
16 *
17 * The full GNU General Public License is included in this distribution in the
18 * file called LICENSE.
19 *
20 */
21
22#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
23
24#include <linux/kernel.h>
25#include <linux/module.h>
26#include <linux/device.h>
27#include <linux/sched.h>
28#include <linux/fs.h>
29#include <linux/types.h>
30#include <linux/string.h>
31#include <linux/netdevice.h>
32#include <linux/inetdevice.h>
33#include <linux/in.h>
34#include <linux/sysfs.h>
35#include <linux/ctype.h>
36#include <linux/inet.h>
37#include <linux/rtnetlink.h>
38#include <linux/etherdevice.h>
39#include <net/net_namespace.h>
40#include <net/netns/generic.h>
41#include <linux/nsproxy.h>
42
43#include <net/bonding.h>
44
45#define to_bond(cd) ((struct bonding *)(netdev_priv(to_net_dev(cd))))
46
47/* "show" function for the bond_masters attribute.
48 * The class parameter is ignored.
49 */
50static ssize_t bonding_show_bonds(struct class *cls,
51 struct class_attribute *attr,
52 char *buf)
53{
54 struct bond_net *bn =
55 container_of(attr, struct bond_net, class_attr_bonding_masters);
56 int res = 0;
57 struct bonding *bond;
58
59 rtnl_lock();
60
61 list_for_each_entry(bond, &bn->dev_list, bond_list) {
62 if (res > (PAGE_SIZE - IFNAMSIZ)) {
63 /* not enough space for another interface name */
64 if ((PAGE_SIZE - res) > 10)
65 res = PAGE_SIZE - 10;
66 res += sprintf(buf + res, "++more++ ");
67 break;
68 }
69 res += sprintf(buf + res, "%s ", bond->dev->name);
70 }
71 if (res)
72 buf[res-1] = '\n'; /* eat the leftover space */
73
74 rtnl_unlock();
75 return res;
76}
77
78static struct net_device *bond_get_by_name(struct bond_net *bn, const char *ifname)
79{
80 struct bonding *bond;
81
82 list_for_each_entry(bond, &bn->dev_list, bond_list) {
83 if (strncmp(bond->dev->name, ifname, IFNAMSIZ) == 0)
84 return bond->dev;
85 }
86 return NULL;
87}
88
89/* "store" function for the bond_masters attribute. This is what
90 * creates and deletes entire bonds.
91 *
92 * The class parameter is ignored.
93 */
94static ssize_t bonding_store_bonds(struct class *cls,
95 struct class_attribute *attr,
96 const char *buffer, size_t count)
97{
98 struct bond_net *bn =
99 container_of(attr, struct bond_net, class_attr_bonding_masters);
100 char command[IFNAMSIZ + 1] = {0, };
101 char *ifname;
102 int rv, res = count;
103
104 sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
105 ifname = command + 1;
106 if ((strlen(command) <= 1) ||
107 !dev_valid_name(ifname))
108 goto err_no_cmd;
109
110 if (command[0] == '+') {
111 pr_info("%s is being created...\n", ifname);
112 rv = bond_create(bn->net, ifname);
113 if (rv) {
114 if (rv == -EEXIST)
115 pr_info("%s already exists\n", ifname);
116 else
117 pr_info("%s creation failed\n", ifname);
118 res = rv;
119 }
120 } else if (command[0] == '-') {
121 struct net_device *bond_dev;
122
123 rtnl_lock();
124 bond_dev = bond_get_by_name(bn, ifname);
125 if (bond_dev) {
126 pr_info("%s is being deleted...\n", ifname);
127 unregister_netdevice(bond_dev);
128 } else {
129 pr_err("unable to delete non-existent %s\n", ifname);
130 res = -ENODEV;
131 }
132 rtnl_unlock();
133 } else
134 goto err_no_cmd;
135
136 /* Always return either count or an error. If you return 0, you'll
137 * get called forever, which is bad.
138 */
139 return res;
140
141err_no_cmd:
142 pr_err("no command found in bonding_masters - use +ifname or -ifname\n");
143 return -EPERM;
144}
145
146/* class attribute for bond_masters file. This ends up in /sys/class/net */
147static const struct class_attribute class_attr_bonding_masters = {
148 .attr = {
149 .name = "bonding_masters",
150 .mode = S_IWUSR | S_IRUGO,
151 },
152 .show = bonding_show_bonds,
153 .store = bonding_store_bonds,
154};
155
156/* Generic "store" method for bonding sysfs option setting */
157static ssize_t bonding_sysfs_store_option(struct device *d,
158 struct device_attribute *attr,
159 const char *buffer, size_t count)
160{
161 struct bonding *bond = to_bond(d);
162 const struct bond_option *opt;
163 int ret;
164
165 opt = bond_opt_get_by_name(attr->attr.name);
166 if (WARN_ON(!opt))
167 return -ENOENT;
168 ret = bond_opt_tryset_rtnl(bond, opt->id, (char *)buffer);
169 if (!ret)
170 ret = count;
171
172 return ret;
173}
174
175/* Show the slaves in the current bond. */
176static ssize_t bonding_show_slaves(struct device *d,
177 struct device_attribute *attr, char *buf)
178{
179 struct bonding *bond = to_bond(d);
180 struct list_head *iter;
181 struct slave *slave;
182 int res = 0;
183
184 if (!rtnl_trylock())
185 return restart_syscall();
186
187 bond_for_each_slave(bond, slave, iter) {
188 if (res > (PAGE_SIZE - IFNAMSIZ)) {
189 /* not enough space for another interface name */
190 if ((PAGE_SIZE - res) > 10)
191 res = PAGE_SIZE - 10;
192 res += sprintf(buf + res, "++more++ ");
193 break;
194 }
195 res += sprintf(buf + res, "%s ", slave->dev->name);
196 }
197
198 rtnl_unlock();
199
200 if (res)
201 buf[res-1] = '\n'; /* eat the leftover space */
202
203 return res;
204}
205static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves,
206 bonding_sysfs_store_option);
207
208/* Show the bonding mode. */
209static ssize_t bonding_show_mode(struct device *d,
210 struct device_attribute *attr, char *buf)
211{
212 struct bonding *bond = to_bond(d);
213 const struct bond_opt_value *val;
214
215 val = bond_opt_get_val(BOND_OPT_MODE, BOND_MODE(bond));
216
217 return sprintf(buf, "%s %d\n", val->string, BOND_MODE(bond));
218}
219static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,
220 bonding_show_mode, bonding_sysfs_store_option);
221
222/* Show the bonding transmit hash method. */
223static ssize_t bonding_show_xmit_hash(struct device *d,
224 struct device_attribute *attr,
225 char *buf)
226{
227 struct bonding *bond = to_bond(d);
228 const struct bond_opt_value *val;
229
230 val = bond_opt_get_val(BOND_OPT_XMIT_HASH, bond->params.xmit_policy);
231
232 return sprintf(buf, "%s %d\n", val->string, bond->params.xmit_policy);
233}
234static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR,
235 bonding_show_xmit_hash, bonding_sysfs_store_option);
236
237/* Show arp_validate. */
238static ssize_t bonding_show_arp_validate(struct device *d,
239 struct device_attribute *attr,
240 char *buf)
241{
242 struct bonding *bond = to_bond(d);
243 const struct bond_opt_value *val;
244
245 val = bond_opt_get_val(BOND_OPT_ARP_VALIDATE,
246 bond->params.arp_validate);
247
248 return sprintf(buf, "%s %d\n", val->string, bond->params.arp_validate);
249}
250static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate,
251 bonding_sysfs_store_option);
252
253/* Show arp_all_targets. */
254static ssize_t bonding_show_arp_all_targets(struct device *d,
255 struct device_attribute *attr,
256 char *buf)
257{
258 struct bonding *bond = to_bond(d);
259 const struct bond_opt_value *val;
260
261 val = bond_opt_get_val(BOND_OPT_ARP_ALL_TARGETS,
262 bond->params.arp_all_targets);
263 return sprintf(buf, "%s %d\n",
264 val->string, bond->params.arp_all_targets);
265}
266static DEVICE_ATTR(arp_all_targets, S_IRUGO | S_IWUSR,
267 bonding_show_arp_all_targets, bonding_sysfs_store_option);
268
269/* Show fail_over_mac. */
270static ssize_t bonding_show_fail_over_mac(struct device *d,
271 struct device_attribute *attr,
272 char *buf)
273{
274 struct bonding *bond = to_bond(d);
275 const struct bond_opt_value *val;
276
277 val = bond_opt_get_val(BOND_OPT_FAIL_OVER_MAC,
278 bond->params.fail_over_mac);
279
280 return sprintf(buf, "%s %d\n", val->string, bond->params.fail_over_mac);
281}
282static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR,
283 bonding_show_fail_over_mac, bonding_sysfs_store_option);
284
285/* Show the arp timer interval. */
286static ssize_t bonding_show_arp_interval(struct device *d,
287 struct device_attribute *attr,
288 char *buf)
289{
290 struct bonding *bond = to_bond(d);
291
292 return sprintf(buf, "%d\n", bond->params.arp_interval);
293}
294static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR,
295 bonding_show_arp_interval, bonding_sysfs_store_option);
296
297/* Show the arp targets. */
298static ssize_t bonding_show_arp_targets(struct device *d,
299 struct device_attribute *attr,
300 char *buf)
301{
302 struct bonding *bond = to_bond(d);
303 int i, res = 0;
304
305 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
306 if (bond->params.arp_targets[i])
307 res += sprintf(buf + res, "%pI4 ",
308 &bond->params.arp_targets[i]);
309 }
310 if (res)
311 buf[res-1] = '\n'; /* eat the leftover space */
312
313 return res;
314}
315static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR,
316 bonding_show_arp_targets, bonding_sysfs_store_option);
317
318/* Show the up and down delays. */
319static ssize_t bonding_show_downdelay(struct device *d,
320 struct device_attribute *attr,
321 char *buf)
322{
323 struct bonding *bond = to_bond(d);
324
325 return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
326}
327static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR,
328 bonding_show_downdelay, bonding_sysfs_store_option);
329
330static ssize_t bonding_show_updelay(struct device *d,
331 struct device_attribute *attr,
332 char *buf)
333{
334 struct bonding *bond = to_bond(d);
335
336 return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
337
338}
339static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR,
340 bonding_show_updelay, bonding_sysfs_store_option);
341
342/* Show the LACP interval. */
343static ssize_t bonding_show_lacp(struct device *d,
344 struct device_attribute *attr,
345 char *buf)
346{
347 struct bonding *bond = to_bond(d);
348 const struct bond_opt_value *val;
349
350 val = bond_opt_get_val(BOND_OPT_LACP_RATE, bond->params.lacp_fast);
351
352 return sprintf(buf, "%s %d\n", val->string, bond->params.lacp_fast);
353}
354static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR,
355 bonding_show_lacp, bonding_sysfs_store_option);
356
357static ssize_t bonding_show_min_links(struct device *d,
358 struct device_attribute *attr,
359 char *buf)
360{
361 struct bonding *bond = to_bond(d);
362
363 return sprintf(buf, "%u\n", bond->params.min_links);
364}
365static DEVICE_ATTR(min_links, S_IRUGO | S_IWUSR,
366 bonding_show_min_links, bonding_sysfs_store_option);
367
368static ssize_t bonding_show_ad_select(struct device *d,
369 struct device_attribute *attr,
370 char *buf)
371{
372 struct bonding *bond = to_bond(d);
373 const struct bond_opt_value *val;
374
375 val = bond_opt_get_val(BOND_OPT_AD_SELECT, bond->params.ad_select);
376
377 return sprintf(buf, "%s %d\n", val->string, bond->params.ad_select);
378}
379static DEVICE_ATTR(ad_select, S_IRUGO | S_IWUSR,
380 bonding_show_ad_select, bonding_sysfs_store_option);
381
382/* Show the number of peer notifications to send after a failover event. */
383static ssize_t bonding_show_num_peer_notif(struct device *d,
384 struct device_attribute *attr,
385 char *buf)
386{
387 struct bonding *bond = to_bond(d);
388 return sprintf(buf, "%d\n", bond->params.num_peer_notif);
389}
390static DEVICE_ATTR(num_grat_arp, S_IRUGO | S_IWUSR,
391 bonding_show_num_peer_notif, bonding_sysfs_store_option);
392static DEVICE_ATTR(num_unsol_na, S_IRUGO | S_IWUSR,
393 bonding_show_num_peer_notif, bonding_sysfs_store_option);
394
395/* Show the MII monitor interval. */
396static ssize_t bonding_show_miimon(struct device *d,
397 struct device_attribute *attr,
398 char *buf)
399{
400 struct bonding *bond = to_bond(d);
401
402 return sprintf(buf, "%d\n", bond->params.miimon);
403}
404static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR,
405 bonding_show_miimon, bonding_sysfs_store_option);
406
407/* Show the primary slave. */
408static ssize_t bonding_show_primary(struct device *d,
409 struct device_attribute *attr,
410 char *buf)
411{
412 struct bonding *bond = to_bond(d);
413 struct slave *primary;
414 int count = 0;
415
416 rcu_read_lock();
417 primary = rcu_dereference(bond->primary_slave);
418 if (primary)
419 count = sprintf(buf, "%s\n", primary->dev->name);
420 rcu_read_unlock();
421
422 return count;
423}
424static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR,
425 bonding_show_primary, bonding_sysfs_store_option);
426
427/* Show the primary_reselect flag. */
428static ssize_t bonding_show_primary_reselect(struct device *d,
429 struct device_attribute *attr,
430 char *buf)
431{
432 struct bonding *bond = to_bond(d);
433 const struct bond_opt_value *val;
434
435 val = bond_opt_get_val(BOND_OPT_PRIMARY_RESELECT,
436 bond->params.primary_reselect);
437
438 return sprintf(buf, "%s %d\n",
439 val->string, bond->params.primary_reselect);
440}
441static DEVICE_ATTR(primary_reselect, S_IRUGO | S_IWUSR,
442 bonding_show_primary_reselect, bonding_sysfs_store_option);
443
444/* Show the use_carrier flag. */
445static ssize_t bonding_show_carrier(struct device *d,
446 struct device_attribute *attr,
447 char *buf)
448{
449 struct bonding *bond = to_bond(d);
450
451 return sprintf(buf, "%d\n", bond->params.use_carrier);
452}
453static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR,
454 bonding_show_carrier, bonding_sysfs_store_option);
455
456
457/* Show currently active_slave. */
458static ssize_t bonding_show_active_slave(struct device *d,
459 struct device_attribute *attr,
460 char *buf)
461{
462 struct bonding *bond = to_bond(d);
463 struct net_device *slave_dev;
464 int count = 0;
465
466 rcu_read_lock();
467 slave_dev = bond_option_active_slave_get_rcu(bond);
468 if (slave_dev)
469 count = sprintf(buf, "%s\n", slave_dev->name);
470 rcu_read_unlock();
471
472 return count;
473}
474static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR,
475 bonding_show_active_slave, bonding_sysfs_store_option);
476
477/* Show link status of the bond interface. */
478static ssize_t bonding_show_mii_status(struct device *d,
479 struct device_attribute *attr,
480 char *buf)
481{
482 struct bonding *bond = to_bond(d);
483 bool active = netif_carrier_ok(bond->dev);
484
485 return sprintf(buf, "%s\n", active ? "up" : "down");
486}
487static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
488
489/* Show current 802.3ad aggregator ID. */
490static ssize_t bonding_show_ad_aggregator(struct device *d,
491 struct device_attribute *attr,
492 char *buf)
493{
494 int count = 0;
495 struct bonding *bond = to_bond(d);
496
497 if (BOND_MODE(bond) == BOND_MODE_8023AD) {
498 struct ad_info ad_info;
499 count = sprintf(buf, "%d\n",
500 bond_3ad_get_active_agg_info(bond, &ad_info)
501 ? 0 : ad_info.aggregator_id);
502 }
503
504 return count;
505}
506static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
507
508
509/* Show number of active 802.3ad ports. */
510static ssize_t bonding_show_ad_num_ports(struct device *d,
511 struct device_attribute *attr,
512 char *buf)
513{
514 int count = 0;
515 struct bonding *bond = to_bond(d);
516
517 if (BOND_MODE(bond) == BOND_MODE_8023AD) {
518 struct ad_info ad_info;
519 count = sprintf(buf, "%d\n",
520 bond_3ad_get_active_agg_info(bond, &ad_info)
521 ? 0 : ad_info.ports);
522 }
523
524 return count;
525}
526static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
527
528
529/* Show current 802.3ad actor key. */
530static ssize_t bonding_show_ad_actor_key(struct device *d,
531 struct device_attribute *attr,
532 char *buf)
533{
534 int count = 0;
535 struct bonding *bond = to_bond(d);
536
537 if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN)) {
538 struct ad_info ad_info;
539 count = sprintf(buf, "%d\n",
540 bond_3ad_get_active_agg_info(bond, &ad_info)
541 ? 0 : ad_info.actor_key);
542 }
543
544 return count;
545}
546static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
547
548
549/* Show current 802.3ad partner key. */
550static ssize_t bonding_show_ad_partner_key(struct device *d,
551 struct device_attribute *attr,
552 char *buf)
553{
554 int count = 0;
555 struct bonding *bond = to_bond(d);
556
557 if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN)) {
558 struct ad_info ad_info;
559 count = sprintf(buf, "%d\n",
560 bond_3ad_get_active_agg_info(bond, &ad_info)
561 ? 0 : ad_info.partner_key);
562 }
563
564 return count;
565}
566static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
567
568
569/* Show current 802.3ad partner mac. */
570static ssize_t bonding_show_ad_partner_mac(struct device *d,
571 struct device_attribute *attr,
572 char *buf)
573{
574 int count = 0;
575 struct bonding *bond = to_bond(d);
576
577 if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN)) {
578 struct ad_info ad_info;
579 if (!bond_3ad_get_active_agg_info(bond, &ad_info))
580 count = sprintf(buf, "%pM\n", ad_info.partner_system);
581 }
582
583 return count;
584}
585static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
586
587/* Show the queue_ids of the slaves in the current bond. */
588static ssize_t bonding_show_queue_id(struct device *d,
589 struct device_attribute *attr,
590 char *buf)
591{
592 struct bonding *bond = to_bond(d);
593 struct list_head *iter;
594 struct slave *slave;
595 int res = 0;
596
597 if (!rtnl_trylock())
598 return restart_syscall();
599
600 bond_for_each_slave(bond, slave, iter) {
601 if (res > (PAGE_SIZE - IFNAMSIZ - 6)) {
602 /* not enough space for another interface_name:queue_id pair */
603 if ((PAGE_SIZE - res) > 10)
604 res = PAGE_SIZE - 10;
605 res += sprintf(buf + res, "++more++ ");
606 break;
607 }
608 res += sprintf(buf + res, "%s:%d ",
609 slave->dev->name, slave->queue_id);
610 }
611 if (res)
612 buf[res-1] = '\n'; /* eat the leftover space */
613
614 rtnl_unlock();
615
616 return res;
617}
618static DEVICE_ATTR(queue_id, S_IRUGO | S_IWUSR, bonding_show_queue_id,
619 bonding_sysfs_store_option);
620
621
622/* Show the all_slaves_active flag. */
623static ssize_t bonding_show_slaves_active(struct device *d,
624 struct device_attribute *attr,
625 char *buf)
626{
627 struct bonding *bond = to_bond(d);
628
629 return sprintf(buf, "%d\n", bond->params.all_slaves_active);
630}
631static DEVICE_ATTR(all_slaves_active, S_IRUGO | S_IWUSR,
632 bonding_show_slaves_active, bonding_sysfs_store_option);
633
634/* Show the number of IGMP membership reports to send on link failure */
635static ssize_t bonding_show_resend_igmp(struct device *d,
636 struct device_attribute *attr,
637 char *buf)
638{
639 struct bonding *bond = to_bond(d);
640
641 return sprintf(buf, "%d\n", bond->params.resend_igmp);
642}
643static DEVICE_ATTR(resend_igmp, S_IRUGO | S_IWUSR,
644 bonding_show_resend_igmp, bonding_sysfs_store_option);
645
646
647static ssize_t bonding_show_lp_interval(struct device *d,
648 struct device_attribute *attr,
649 char *buf)
650{
651 struct bonding *bond = to_bond(d);
652
653 return sprintf(buf, "%d\n", bond->params.lp_interval);
654}
655static DEVICE_ATTR(lp_interval, S_IRUGO | S_IWUSR,
656 bonding_show_lp_interval, bonding_sysfs_store_option);
657
658static ssize_t bonding_show_tlb_dynamic_lb(struct device *d,
659 struct device_attribute *attr,
660 char *buf)
661{
662 struct bonding *bond = to_bond(d);
663 return sprintf(buf, "%d\n", bond->params.tlb_dynamic_lb);
664}
665static DEVICE_ATTR(tlb_dynamic_lb, S_IRUGO | S_IWUSR,
666 bonding_show_tlb_dynamic_lb, bonding_sysfs_store_option);
667
668static ssize_t bonding_show_packets_per_slave(struct device *d,
669 struct device_attribute *attr,
670 char *buf)
671{
672 struct bonding *bond = to_bond(d);
673 unsigned int packets_per_slave = bond->params.packets_per_slave;
674
675 return sprintf(buf, "%u\n", packets_per_slave);
676}
677static DEVICE_ATTR(packets_per_slave, S_IRUGO | S_IWUSR,
678 bonding_show_packets_per_slave, bonding_sysfs_store_option);
679
680static ssize_t bonding_show_ad_actor_sys_prio(struct device *d,
681 struct device_attribute *attr,
682 char *buf)
683{
684 struct bonding *bond = to_bond(d);
685
686 if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN))
687 return sprintf(buf, "%hu\n", bond->params.ad_actor_sys_prio);
688
689 return 0;
690}
691static DEVICE_ATTR(ad_actor_sys_prio, S_IRUGO | S_IWUSR,
692 bonding_show_ad_actor_sys_prio, bonding_sysfs_store_option);
693
694static ssize_t bonding_show_ad_actor_system(struct device *d,
695 struct device_attribute *attr,
696 char *buf)
697{
698 struct bonding *bond = to_bond(d);
699
700 if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN))
701 return sprintf(buf, "%pM\n", bond->params.ad_actor_system);
702
703 return 0;
704}
705
706static DEVICE_ATTR(ad_actor_system, S_IRUGO | S_IWUSR,
707 bonding_show_ad_actor_system, bonding_sysfs_store_option);
708
709static ssize_t bonding_show_ad_user_port_key(struct device *d,
710 struct device_attribute *attr,
711 char *buf)
712{
713 struct bonding *bond = to_bond(d);
714
715 if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN))
716 return sprintf(buf, "%hu\n", bond->params.ad_user_port_key);
717
718 return 0;
719}
720static DEVICE_ATTR(ad_user_port_key, S_IRUGO | S_IWUSR,
721 bonding_show_ad_user_port_key, bonding_sysfs_store_option);
722
723static struct attribute *per_bond_attrs[] = {
724 &dev_attr_slaves.attr,
725 &dev_attr_mode.attr,
726 &dev_attr_fail_over_mac.attr,
727 &dev_attr_arp_validate.attr,
728 &dev_attr_arp_all_targets.attr,
729 &dev_attr_arp_interval.attr,
730 &dev_attr_arp_ip_target.attr,
731 &dev_attr_downdelay.attr,
732 &dev_attr_updelay.attr,
733 &dev_attr_lacp_rate.attr,
734 &dev_attr_ad_select.attr,
735 &dev_attr_xmit_hash_policy.attr,
736 &dev_attr_num_grat_arp.attr,
737 &dev_attr_num_unsol_na.attr,
738 &dev_attr_miimon.attr,
739 &dev_attr_primary.attr,
740 &dev_attr_primary_reselect.attr,
741 &dev_attr_use_carrier.attr,
742 &dev_attr_active_slave.attr,
743 &dev_attr_mii_status.attr,
744 &dev_attr_ad_aggregator.attr,
745 &dev_attr_ad_num_ports.attr,
746 &dev_attr_ad_actor_key.attr,
747 &dev_attr_ad_partner_key.attr,
748 &dev_attr_ad_partner_mac.attr,
749 &dev_attr_queue_id.attr,
750 &dev_attr_all_slaves_active.attr,
751 &dev_attr_resend_igmp.attr,
752 &dev_attr_min_links.attr,
753 &dev_attr_lp_interval.attr,
754 &dev_attr_packets_per_slave.attr,
755 &dev_attr_tlb_dynamic_lb.attr,
756 &dev_attr_ad_actor_sys_prio.attr,
757 &dev_attr_ad_actor_system.attr,
758 &dev_attr_ad_user_port_key.attr,
759 NULL,
760};
761
762static struct attribute_group bonding_group = {
763 .name = "bonding",
764 .attrs = per_bond_attrs,
765};
766
767/* Initialize sysfs. This sets up the bonding_masters file in
768 * /sys/class/net.
769 */
770int bond_create_sysfs(struct bond_net *bn)
771{
772 int ret;
773
774 bn->class_attr_bonding_masters = class_attr_bonding_masters;
775 sysfs_attr_init(&bn->class_attr_bonding_masters.attr);
776
777 ret = netdev_class_create_file_ns(&bn->class_attr_bonding_masters,
778 bn->net);
779 /* Permit multiple loads of the module by ignoring failures to
780 * create the bonding_masters sysfs file. Bonding devices
781 * created by second or subsequent loads of the module will
782 * not be listed in, or controllable by, bonding_masters, but
783 * will have the usual "bonding" sysfs directory.
784 *
785 * This is done to preserve backwards compatibility for
786 * initscripts/sysconfig, which load bonding multiple times to
787 * configure multiple bonding devices.
788 */
789 if (ret == -EEXIST) {
790 /* Is someone being kinky and naming a device bonding_master? */
791 if (__dev_get_by_name(bn->net,
792 class_attr_bonding_masters.attr.name))
793 pr_err("network device named %s already exists in sysfs\n",
794 class_attr_bonding_masters.attr.name);
795 ret = 0;
796 }
797
798 return ret;
799
800}
801
802/* Remove /sys/class/net/bonding_masters. */
803void bond_destroy_sysfs(struct bond_net *bn)
804{
805 netdev_class_remove_file_ns(&bn->class_attr_bonding_masters, bn->net);
806}
807
808/* Initialize sysfs for each bond. This sets up and registers
809 * the 'bondctl' directory for each individual bond under /sys/class/net.
810 */
811void bond_prepare_sysfs_group(struct bonding *bond)
812{
813 bond->dev->sysfs_groups[0] = &bonding_group;
814}
815