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