summaryrefslogtreecommitdiff
path: root/drivers/net/bonding/bond_sysfs.c
blob: 39c4d8d610746b02095cc41fca2f50683bb40490 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
/*
 * Copyright(c) 2004-2005 Intel Corporation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, see <http://www.gnu.org/licenses/>.
 *
 * The full GNU General Public License is included in this distribution in the
 * file called LICENSE.
 *
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/sched.h>
#include <linux/fs.h>
#include <linux/types.h>
#include <linux/string.h>
#include <linux/netdevice.h>
#include <linux/inetdevice.h>
#include <linux/in.h>
#include <linux/sysfs.h>
#include <linux/ctype.h>
#include <linux/inet.h>
#include <linux/rtnetlink.h>
#include <linux/etherdevice.h>
#include <net/net_namespace.h>
#include <net/netns/generic.h>
#include <linux/nsproxy.h>

#include "bonding.h"

#define to_dev(obj)	container_of(obj, struct device, kobj)
#define to_bond(cd)	((struct bonding *)(netdev_priv(to_net_dev(cd))))

/* "show" function for the bond_masters attribute.
 * The class parameter is ignored.
 */
static ssize_t bonding_show_bonds(struct class *cls,
				  struct class_attribute *attr,
				  char *buf)
{
	struct bond_net *bn =
		container_of(attr, struct bond_net, class_attr_bonding_masters);
	int res = 0;
	struct bonding *bond;

	rtnl_lock();

	list_for_each_entry(bond, &bn->dev_list, bond_list) {
		if (res > (PAGE_SIZE - IFNAMSIZ)) {
			/* not enough space for another interface name */
			if ((PAGE_SIZE - res) > 10)
				res = PAGE_SIZE - 10;
			res += sprintf(buf + res, "++more++ ");
			break;
		}
		res += sprintf(buf + res, "%s ", bond->dev->name);
	}
	if (res)
		buf[res-1] = '\n'; /* eat the leftover space */

	rtnl_unlock();
	return res;
}

static struct net_device *bond_get_by_name(struct bond_net *bn, const char *ifname)
{
	struct bonding *bond;

	list_for_each_entry(bond, &bn->dev_list, bond_list) {
		if (strncmp(bond->dev->name, ifname, IFNAMSIZ) == 0)
			return bond->dev;
	}
	return NULL;
}

/* "store" function for the bond_masters attribute.  This is what
 * creates and deletes entire bonds.
 *
 * The class parameter is ignored.
 *
 */
static ssize_t bonding_store_bonds(struct class *cls,
				   struct class_attribute *attr,
				   const char *buffer, size_t count)
{
	struct bond_net *bn =
		container_of(attr, struct bond_net, class_attr_bonding_masters);
	char command[IFNAMSIZ + 1] = {0, };
	char *ifname;
	int rv, res = count;

	sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
	ifname = command + 1;
	if ((strlen(command) <= 1) ||
	    !dev_valid_name(ifname))
		goto err_no_cmd;

	if (command[0] == '+') {
		pr_info("%s is being created...\n", ifname);
		rv = bond_create(bn->net, ifname);
		if (rv) {
			if (rv == -EEXIST)
				pr_info("%s already exists\n", ifname);
			else
				pr_info("%s creation failed\n", ifname);
			res = rv;
		}
	} else if (command[0] == '-') {
		struct net_device *bond_dev;

		rtnl_lock();
		bond_dev = bond_get_by_name(bn, ifname);
		if (bond_dev) {
			pr_info("%s is being deleted...\n", ifname);
			unregister_netdevice(bond_dev);
		} else {
			pr_err("unable to delete non-existent %s\n", ifname);
			res = -ENODEV;
		}
		rtnl_unlock();
	} else
		goto err_no_cmd;

	/* Always return either count or an error.  If you return 0, you'll
	 * get called forever, which is bad.
	 */
	return res;

err_no_cmd:
	pr_err("no command found in bonding_masters - use +ifname or -ifname\n");
	return -EPERM;
}

/* class attribute for bond_masters file.  This ends up in /sys/class/net */
static const struct class_attribute class_attr_bonding_masters = {
	.attr = {
		.name = "bonding_masters",
		.mode = S_IWUSR | S_IRUGO,
	},
	.show = bonding_show_bonds,
	.store = bonding_store_bonds,
};

/* Generic "store" method for bonding sysfs option setting */
static ssize_t bonding_sysfs_store_option(struct device *d,
					  struct device_attribute *attr,
					  const char *buffer, size_t count)
{
	struct bonding *bond = to_bond(d);
	const struct bond_option *opt;
	int ret;

	opt = bond_opt_get_by_name(attr->attr.name);
	if (WARN_ON(!opt))
		return -ENOENT;
	ret = bond_opt_tryset_rtnl(bond, opt->id, (char *)buffer);
	if (!ret)
		ret = count;

	return ret;
}

/* Show the slaves in the current bond. */
static ssize_t bonding_show_slaves(struct device *d,
				   struct device_attribute *attr, char *buf)
{
	struct bonding *bond = to_bond(d);
	struct list_head *iter;
	struct slave *slave;
	int res = 0;

	if (!rtnl_trylock())
		return restart_syscall();

	bond_for_each_slave(bond, slave, iter) {
		if (res > (PAGE_SIZE - IFNAMSIZ)) {
			/* not enough space for another interface name */
			if ((PAGE_SIZE - res) > 10)
				res = PAGE_SIZE - 10;
			res += sprintf(buf + res, "++more++ ");
			break;
		}
		res += sprintf(buf + res, "%s ", slave->dev->name);
	}

	rtnl_unlock();

	if (res)
		buf[res-1] = '\n'; /* eat the leftover space */

	return res;
}
static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves,
		   bonding_sysfs_store_option);

/* Show the bonding mode. */
static ssize_t bonding_show_mode(struct device *d,
				 struct device_attribute *attr, char *buf)
{
	struct bonding *bond = to_bond(d);
	const struct bond_opt_value *val;

	val = bond_opt_get_val(BOND_OPT_MODE, bond->params.mode);

	return sprintf(buf, "%s %d\n", val->string, bond->params.mode);
}
static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,
		   bonding_show_mode, bonding_sysfs_store_option);

/* Show the bonding transmit hash method. */
static ssize_t bonding_show_xmit_hash(struct device *d,
				      struct device_attribute *attr,
				      char *buf)
{
	struct bonding *bond = to_bond(d);
	const struct bond_opt_value *val;

	val = bond_opt_get_val(BOND_OPT_XMIT_HASH, bond->params.xmit_policy);

	return sprintf(buf, "%s %d\n", val->string, bond->params.xmit_policy);
}
static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR,
		   bonding_show_xmit_hash, bonding_sysfs_store_option);

/* Show arp_validate. */
static ssize_t bonding_show_arp_validate(struct device *d,
					 struct device_attribute *attr,
					 char *buf)
{
	struct bonding *bond = to_bond(d);
	const struct bond_opt_value *val;

	val = bond_opt_get_val(BOND_OPT_ARP_VALIDATE,
			       bond->params.arp_validate);

	return sprintf(buf, "%s %d\n", val->string, bond->params.arp_validate);
}
static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate,
		   bonding_sysfs_store_option);

/* Show arp_all_targets. */
static ssize_t bonding_show_arp_all_targets(struct device *d,
					 struct device_attribute *attr,
					 char *buf)
{
	struct bonding *bond = to_bond(d);
	const struct bond_opt_value *val;

	val = bond_opt_get_val(BOND_OPT_ARP_ALL_TARGETS,
			       bond->params.arp_all_targets);
	return sprintf(buf, "%s %d\n",
		       val->string, bond->params.arp_all_targets);
}
static DEVICE_ATTR(arp_all_targets, S_IRUGO | S_IWUSR,
		   bonding_show_arp_all_targets, bonding_sysfs_store_option);

/* Show fail_over_mac. */
static ssize_t bonding_show_fail_over_mac(struct device *d,
					  struct device_attribute *attr,
					  char *buf)
{
	struct bonding *bond = to_bond(d);
	const struct bond_opt_value *val;

	val = bond_opt_get_val(BOND_OPT_FAIL_OVER_MAC,
			       bond->params.fail_over_mac);

	return sprintf(buf, "%s %d\n", val->string, bond->params.fail_over_mac);
}
static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR,
		   bonding_show_fail_over_mac, bonding_sysfs_store_option);

/* Show the arp timer interval. */
static ssize_t bonding_show_arp_interval(struct device *d,
					 struct device_attribute *attr,
					 char *buf)
{
	struct bonding *bond = to_bond(d);

	return sprintf(buf, "%d\n", bond->params.arp_interval);
}
static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR,
		   bonding_show_arp_interval, bonding_sysfs_store_option);

/* Show the arp targets. */
static ssize_t bonding_show_arp_targets(struct device *d,
					struct device_attribute *attr,
					char *buf)
{
	struct bonding *bond = to_bond(d);
	int i, res = 0;

	for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
		if (bond->params.arp_targets[i])
			res += sprintf(buf + res, "%pI4 ",
				       &bond->params.arp_targets[i]);
	}
	if (res)
		buf[res-1] = '\n'; /* eat the leftover space */

	return res;
}
static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR,
		   bonding_show_arp_targets, bonding_sysfs_store_option);

/* Show the up and down delays. */
static ssize_t bonding_show_downdelay(struct device *d,
				      struct device_attribute *attr,
				      char *buf)
{
	struct bonding *bond = to_bond(d);

	return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
}
static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR,
		   bonding_show_downdelay, bonding_sysfs_store_option);

static ssize_t bonding_show_updelay(struct device *d,
				    struct device_attribute *attr,
				    char *buf)
{
	struct bonding *bond = to_bond(d);

	return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);

}
static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR,
		   bonding_show_updelay, bonding_sysfs_store_option);

/* Show the LACP interval. */
static ssize_t bonding_show_lacp(struct device *d,
				 struct device_attribute *attr,
				 char *buf)
{
	struct bonding *bond = to_bond(d);
	const struct bond_opt_value *val;

	val = bond_opt_get_val(BOND_OPT_LACP_RATE, bond->params.lacp_fast);

	return sprintf(buf, "%s %d\n", val->string, bond->params.lacp_fast);
}
static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR,
		   bonding_show_lacp, bonding_sysfs_store_option);

static ssize_t bonding_show_min_links(struct device *d,
				      struct device_attribute *attr,
				      char *buf)
{
	struct bonding *bond = to_bond(d);

	return sprintf(buf, "%u\n", bond->params.min_links);
}
static DEVICE_ATTR(min_links, S_IRUGO | S_IWUSR,
		   bonding_show_min_links, bonding_sysfs_store_option);

static ssize_t bonding_show_ad_select(struct device *d,
				      struct device_attribute *attr,
				      char *buf)
{
	struct bonding *bond = to_bond(d);
	const struct bond_opt_value *val;

	val = bond_opt_get_val(BOND_OPT_AD_SELECT, bond->params.ad_select);

	return sprintf(buf, "%s %d\n", val->string, bond->params.ad_select);
}
static DEVICE_ATTR(ad_select, S_IRUGO | S_IWUSR,
		   bonding_show_ad_select, bonding_sysfs_store_option);

/* Show and set the number of peer notifications to send after a failover event. */
static ssize_t bonding_show_num_peer_notif(struct device *d,
					   struct device_attribute *attr,
					   char *buf)
{
	struct bonding *bond = to_bond(d);
	return sprintf(buf, "%d\n", bond->params.num_peer_notif);
}

static ssize_t bonding_store_num_peer_notif(struct device *d,
					    struct device_attribute *attr,
					    const char *buf, size_t count)
{
	struct bonding *bond = to_bond(d);
	int ret;

	ret = bond_opt_tryset_rtnl(bond, BOND_OPT_NUM_PEER_NOTIF, (char *)buf);
	if (!ret)
		ret = count;

	return ret;
}
static DEVICE_ATTR(num_grat_arp, S_IRUGO | S_IWUSR,
		   bonding_show_num_peer_notif, bonding_store_num_peer_notif);
static DEVICE_ATTR(num_unsol_na, S_IRUGO | S_IWUSR,
		   bonding_show_num_peer_notif, bonding_store_num_peer_notif);

/* Show the MII monitor interval. */
static ssize_t bonding_show_miimon(struct device *d,
				   struct device_attribute *attr,
				   char *buf)
{
	struct bonding *bond = to_bond(d);

	return sprintf(buf, "%d\n", bond->params.miimon);
}
static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR,
		   bonding_show_miimon, bonding_sysfs_store_option);

/* Show the primary slave. */
static ssize_t bonding_show_primary(struct device *d,
				    struct device_attribute *attr,
				    char *buf)
{
	int count = 0;
	struct bonding *bond = to_bond(d);

	if (bond->primary_slave)
		count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);

	return count;
}
static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR,
		   bonding_show_primary, bonding_sysfs_store_option);

/* Show the primary_reselect flag. */
static ssize_t bonding_show_primary_reselect(struct device *d,
					     struct device_attribute *attr,
					     char *buf)
{
	struct bonding *bond = to_bond(d);
	const struct bond_opt_value *val;

	val = bond_opt_get_val(BOND_OPT_PRIMARY_RESELECT,
			       bond->params.primary_reselect);

	return sprintf(buf, "%s %d\n",
		       val->string, bond->params.primary_reselect);
}
static DEVICE_ATTR(primary_reselect, S_IRUGO | S_IWUSR,
		   bonding_show_primary_reselect, bonding_sysfs_store_option);

/* Show the use_carrier flag. */
static ssize_t bonding_show_carrier(struct device *d,
				    struct device_attribute *attr,
				    char *buf)
{
	struct bonding *bond = to_bond(d);

	return sprintf(buf, "%d\n", bond->params.use_carrier);
}
static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR,
		   bonding_show_carrier, bonding_sysfs_store_option);


/* Show currently active_slave. */
static ssize_t bonding_show_active_slave(struct device *d,
					 struct device_attribute *attr,
					 char *buf)
{
	struct bonding *bond = to_bond(d);
	struct net_device *slave_dev;
	int count = 0;

	rcu_read_lock();
	slave_dev = bond_option_active_slave_get_rcu(bond);
	if (slave_dev)
		count = sprintf(buf, "%s\n", slave_dev->name);
	rcu_read_unlock();

	return count;
}
static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR,
		   bonding_show_active_slave, bonding_sysfs_store_option);

/* Show link status of the bond interface. */
static ssize_t bonding_show_mii_status(struct device *d,
				       struct device_attribute *attr,
				       char *buf)
{
	struct bonding *bond = to_bond(d);

	return sprintf(buf, "%s\n", bond->curr_active_slave ? "up" : "down");
}
static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);

/* Show current 802.3ad aggregator ID. */
static ssize_t bonding_show_ad_aggregator(struct device *d,
					  struct device_attribute *attr,
					  char *buf)
{
	int count = 0;
	struct bonding *bond = to_bond(d);

	if (bond->params.mode == BOND_MODE_8023AD) {
		struct ad_info ad_info;
		count = sprintf(buf, "%d\n",
				bond_3ad_get_active_agg_info(bond, &ad_info)
				?  0 : ad_info.aggregator_id);
	}

	return count;
}
static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);


/* Show number of active 802.3ad ports. */
static ssize_t bonding_show_ad_num_ports(struct device *d,
					 struct device_attribute *attr,
					 char *buf)
{
	int count = 0;
	struct bonding *bond = to_bond(d);

	if (bond->params.mode == BOND_MODE_8023AD) {
		struct ad_info ad_info;
		count = sprintf(buf, "%d\n",
				bond_3ad_get_active_agg_info(bond, &ad_info)
				?  0 : ad_info.ports);
	}

	return count;
}
static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);


/* Show current 802.3ad actor key. */
static ssize_t bonding_show_ad_actor_key(struct device *d,
					 struct device_attribute *attr,
					 char *buf)
{
	int count = 0;
	struct bonding *bond = to_bond(d);

	if (bond->params.mode == BOND_MODE_8023AD) {
		struct ad_info ad_info;
		count = sprintf(buf, "%d\n",
				bond_3ad_get_active_agg_info(bond, &ad_info)
				?  0 : ad_info.actor_key);
	}

	return count;
}
static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);


/* Show current 802.3ad partner key. */
static ssize_t bonding_show_ad_partner_key(struct device *d,
					   struct device_attribute *attr,
					   char *buf)
{
	int count = 0;
	struct bonding *bond = to_bond(d);

	if (bond->params.mode == BOND_MODE_8023AD) {
		struct ad_info ad_info;
		count = sprintf(buf, "%d\n",
				bond_3ad_get_active_agg_info(bond, &ad_info)
				?  0 : ad_info.partner_key);
	}

	return count;
}
static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);


/* Show current 802.3ad partner mac. */
static ssize_t bonding_show_ad_partner_mac(struct device *d,
					   struct device_attribute *attr,
					   char *buf)
{
	int count = 0;
	struct bonding *bond = to_bond(d);

	if (bond->params.mode == BOND_MODE_8023AD) {
		struct ad_info ad_info;
		if (!bond_3ad_get_active_agg_info(bond, &ad_info))
			count = sprintf(buf, "%pM\n", ad_info.partner_system);
	}

	return count;
}
static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);

/* Show the queue_ids of the slaves in the current bond. */
static ssize_t bonding_show_queue_id(struct device *d,
				     struct device_attribute *attr,
				     char *buf)
{
	struct bonding *bond = to_bond(d);
	struct list_head *iter;
	struct slave *slave;
	int res = 0;

	if (!rtnl_trylock())
		return restart_syscall();

	bond_for_each_slave(bond, slave, iter) {
		if (res > (PAGE_SIZE - IFNAMSIZ - 6)) {
			/* not enough space for another interface_name:queue_id pair */
			if ((PAGE_SIZE - res) > 10)
				res = PAGE_SIZE - 10;
			res += sprintf(buf + res, "++more++ ");
			break;
		}
		res += sprintf(buf + res, "%s:%d ",
			       slave->dev->name, slave->queue_id);
	}
	if (res)
		buf[res-1] = '\n'; /* eat the leftover space */

	rtnl_unlock();

	return res;
}
static DEVICE_ATTR(queue_id, S_IRUGO | S_IWUSR, bonding_show_queue_id,
		   bonding_sysfs_store_option);


/* Show the all_slaves_active flag. */
static ssize_t bonding_show_slaves_active(struct device *d,
					  struct device_attribute *attr,
					  char *buf)
{
	struct bonding *bond = to_bond(d);

	return sprintf(buf, "%d\n", bond->params.all_slaves_active);
}
static DEVICE_ATTR(all_slaves_active, S_IRUGO | S_IWUSR,
		   bonding_show_slaves_active, bonding_sysfs_store_option);

/* Show the number of IGMP membership reports to send on link failure */
static ssize_t bonding_show_resend_igmp(struct device *d,
					struct device_attribute *attr,
					char *buf)
{
	struct bonding *bond = to_bond(d);

	return sprintf(buf, "%d\n", bond->params.resend_igmp);
}
static DEVICE_ATTR(resend_igmp, S_IRUGO | S_IWUSR,
		   bonding_show_resend_igmp, bonding_sysfs_store_option);


static ssize_t bonding_show_lp_interval(struct device *d,
					struct device_attribute *attr,
					char *buf)
{
	struct bonding *bond = to_bond(d);

	return sprintf(buf, "%d\n", bond->params.lp_interval);
}
static DEVICE_ATTR(lp_interval, S_IRUGO | S_IWUSR,
		   bonding_show_lp_interval, bonding_sysfs_store_option);

static ssize_t bonding_show_tlb_dynamic_lb(struct device *d,
					   struct device_attribute *attr,
					   char *buf)
{
	struct bonding *bond = to_bond(d);
	return sprintf(buf, "%d\n", bond->params.tlb_dynamic_lb);
}
static DEVICE_ATTR(tlb_dynamic_lb, S_IRUGO | S_IWUSR,
		   bonding_show_tlb_dynamic_lb, bonding_sysfs_store_option);

static ssize_t bonding_show_packets_per_slave(struct device *d,
					      struct device_attribute *attr,
					      char *buf)
{
	struct bonding *bond = to_bond(d);
	unsigned int packets_per_slave = bond->params.packets_per_slave;

	return sprintf(buf, "%u\n", packets_per_slave);
}
static DEVICE_ATTR(packets_per_slave, S_IRUGO | S_IWUSR,
		   bonding_show_packets_per_slave, bonding_sysfs_store_option);

static struct attribute *per_bond_attrs[] = {
	&dev_attr_slaves.attr,
	&dev_attr_mode.attr,
	&dev_attr_fail_over_mac.attr,
	&dev_attr_arp_validate.attr,
	&dev_attr_arp_all_targets.attr,
	&dev_attr_arp_interval.attr,
	&dev_attr_arp_ip_target.attr,
	&dev_attr_downdelay.attr,
	&dev_attr_updelay.attr,
	&dev_attr_lacp_rate.attr,
	&dev_attr_ad_select.attr,
	&dev_attr_xmit_hash_policy.attr,
	&dev_attr_num_grat_arp.attr,
	&dev_attr_num_unsol_na.attr,
	&dev_attr_miimon.attr,
	&dev_attr_primary.attr,
	&dev_attr_primary_reselect.attr,
	&dev_attr_use_carrier.attr,
	&dev_attr_active_slave.attr,
	&dev_attr_mii_status.attr,
	&dev_attr_ad_aggregator.attr,
	&dev_attr_ad_num_ports.attr,
	&dev_attr_ad_actor_key.attr,
	&dev_attr_ad_partner_key.attr,
	&dev_attr_ad_partner_mac.attr,
	&dev_attr_queue_id.attr,
	&dev_attr_all_slaves_active.attr,
	&dev_attr_resend_igmp.attr,
	&dev_attr_min_links.attr,
	&dev_attr_lp_interval.attr,
	&dev_attr_packets_per_slave.attr,
	&dev_attr_tlb_dynamic_lb.attr,
	NULL,
};

static struct attribute_group bonding_group = {
	.name = "bonding",
	.attrs = per_bond_attrs,
};

/* Initialize sysfs.  This sets up the bonding_masters file in
 * /sys/class/net.
 */
int bond_create_sysfs(struct bond_net *bn)
{
	int ret;

	bn->class_attr_bonding_masters = class_attr_bonding_masters;
	sysfs_attr_init(&bn->class_attr_bonding_masters.attr);

	ret = netdev_class_create_file_ns(&bn->class_attr_bonding_masters,
					  bn->net);
	/* Permit multiple loads of the module by ignoring failures to
	 * create the bonding_masters sysfs file.  Bonding devices
	 * created by second or subsequent loads of the module will
	 * not be listed in, or controllable by, bonding_masters, but
	 * will have the usual "bonding" sysfs directory.
	 *
	 * This is done to preserve backwards compatibility for
	 * initscripts/sysconfig, which load bonding multiple times to
	 * configure multiple bonding devices.
	 */
	if (ret == -EEXIST) {
		/* Is someone being kinky and naming a device bonding_master? */
		if (__dev_get_by_name(bn->net,
				      class_attr_bonding_masters.attr.name))
			pr_err("network device named %s already exists in sysfs\n",
			       class_attr_bonding_masters.attr.name);
		ret = 0;
	}

	return ret;

}

/* Remove /sys/class/net/bonding_masters. */
void bond_destroy_sysfs(struct bond_net *bn)
{
	netdev_class_remove_file_ns(&bn->class_attr_bonding_masters, bn->net);
}

/* Initialize sysfs for each bond.  This sets up and registers
 * the 'bondctl' directory for each individual bond under /sys/class/net.
 */
void bond_prepare_sysfs_group(struct bonding *bond)
{
	bond->dev->sysfs_groups[0] = &bonding_group;
}