blob: 15b6a29bb4d4af3c4098dd611eb3c80a9aa4d7ac [file] [log] [blame]
Mitch Williamsb76cdba2005-11-09 10:36:41 -08001
2/*
3 * Copyright(c) 2004-2005 Intel Corporation. All rights reserved.
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
12 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * for more details.
14 *
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18 *
19 * The full GNU General Public License is included in this distribution in the
20 * file called LICENSE.
21 *
Mitch Williamsb76cdba2005-11-09 10:36:41 -080022 */
Mitch Williamsb76cdba2005-11-09 10:36:41 -080023#include <linux/kernel.h>
24#include <linux/module.h>
25#include <linux/sched.h>
26#include <linux/device.h>
27#include <linux/sysdev.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/string.h>
36#include <linux/ctype.h>
37#include <linux/inet.h>
38#include <linux/rtnetlink.h>
39
40/* #define BONDING_DEBUG 1 */
41#include "bonding.h"
42#define to_class_dev(obj) container_of(obj,struct class_device,kobj)
43#define to_net_dev(class) container_of(class, struct net_device, class_dev)
44#define to_bond(cd) ((struct bonding *)(to_net_dev(cd)->priv))
45
46/*---------------------------- Declarations -------------------------------*/
47
48
49extern struct list_head bond_dev_list;
50extern struct bond_params bonding_defaults;
51extern struct bond_parm_tbl bond_mode_tbl[];
52extern struct bond_parm_tbl bond_lacp_tbl[];
53extern struct bond_parm_tbl xmit_hashtype_tbl[];
54
55static int expected_refcount = -1;
56static struct class *netdev_class;
57/*--------------------------- Data Structures -----------------------------*/
58
59/* Bonding sysfs lock. Why can't we just use the subsytem lock?
60 * Because kobject_register tries to acquire the subsystem lock. If
61 * we already hold the lock (which we would if the user was creating
62 * a new bond through the sysfs interface), we deadlock.
63 * This lock is only needed when deleting a bond - we need to make sure
64 * that we don't collide with an ongoing ioctl.
65 */
66
67struct rw_semaphore bonding_rwsem;
68
69
70
71
72/*------------------------------ Functions --------------------------------*/
73
74/*
75 * "show" function for the bond_masters attribute.
76 * The class parameter is ignored.
77 */
78static ssize_t bonding_show_bonds(struct class *cls, char *buffer)
79{
80 int res = 0;
81 struct bonding *bond;
82
83 down_read(&(bonding_rwsem));
84
85 list_for_each_entry(bond, &bond_dev_list, bond_list) {
86 if (res > (PAGE_SIZE - IFNAMSIZ)) {
87 /* not enough space for another interface name */
88 if ((PAGE_SIZE - res) > 10)
89 res = PAGE_SIZE - 10;
90 res += sprintf(buffer + res, "++more++");
91 break;
92 }
93 res += sprintf(buffer + res, "%s ",
94 bond->dev->name);
95 }
96 res += sprintf(buffer + res, "\n");
97 res++;
98 up_read(&(bonding_rwsem));
99 return res;
100}
101
102/*
103 * "store" function for the bond_masters attribute. This is what
104 * creates and deletes entire bonds.
105 *
106 * The class parameter is ignored.
107 *
108 */
109
110static ssize_t bonding_store_bonds(struct class *cls, const char *buffer, size_t count)
111{
112 char command[IFNAMSIZ + 1] = {0, };
113 char *ifname;
114 int res = count;
115 struct bonding *bond;
116 struct bonding *nxt;
117
118 down_write(&(bonding_rwsem));
119 sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
120 ifname = command + 1;
121 if ((strlen(command) <= 1) ||
122 !dev_valid_name(ifname))
123 goto err_no_cmd;
124
125 if (command[0] == '+') {
126
127 /* Check to see if the bond already exists. */
128 list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list)
129 if (strnicmp(bond->dev->name, ifname, IFNAMSIZ) == 0) {
130 printk(KERN_ERR DRV_NAME
131 ": cannot add bond %s; it already exists\n",
132 ifname);
133 res = -EPERM;
134 goto out;
135 }
136
137 printk(KERN_INFO DRV_NAME
138 ": %s is being created...\n", ifname);
139 if (bond_create(ifname, &bonding_defaults, &bond)) {
140 printk(KERN_INFO DRV_NAME
141 ": %s interface already exists. Bond creation failed.\n",
142 ifname);
143 res = -EPERM;
144 }
145 goto out;
146 }
147
148 if (command[0] == '-') {
149 list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list)
150 if (strnicmp(bond->dev->name, ifname, IFNAMSIZ) == 0) {
151 rtnl_lock();
152 /* check the ref count on the bond's kobject.
153 * If it's > expected, then there's a file open,
154 * and we have to fail.
155 */
156 if (atomic_read(&bond->dev->class_dev.kobj.kref.refcount)
157 > expected_refcount){
158 rtnl_unlock();
159 printk(KERN_INFO DRV_NAME
160 ": Unable remove bond %s due to open references.\n",
161 ifname);
162 res = -EPERM;
163 goto out;
164 }
165 printk(KERN_INFO DRV_NAME
166 ": %s is being deleted...\n",
167 bond->dev->name);
168 unregister_netdevice(bond->dev);
169 bond_deinit(bond->dev);
170 bond_destroy_sysfs_entry(bond);
171 rtnl_unlock();
172 goto out;
173 }
174
175 printk(KERN_ERR DRV_NAME
176 ": unable to delete non-existent bond %s\n", ifname);
177 res = -ENODEV;
178 goto out;
179 }
180
181err_no_cmd:
182 printk(KERN_ERR DRV_NAME
183 ": no command found in bonding_masters. Use +ifname or -ifname.\n");
184 res = -EPERM;
185
186 /* Always return either count or an error. If you return 0, you'll
187 * get called forever, which is bad.
188 */
189out:
190 up_write(&(bonding_rwsem));
191 return res;
192}
193/* class attribute for bond_masters file. This ends up in /sys/class/net */
194static CLASS_ATTR(bonding_masters, S_IWUSR | S_IRUGO,
195 bonding_show_bonds, bonding_store_bonds);
196
197int bond_create_slave_symlinks(struct net_device *master, struct net_device *slave)
198{
199 char linkname[IFNAMSIZ+7];
200 int ret = 0;
201
202 /* first, create a link from the slave back to the master */
203 ret = sysfs_create_link(&(slave->class_dev.kobj), &(master->class_dev.kobj),
204 "master");
205 if (ret)
206 return ret;
207 /* next, create a link from the master to the slave */
208 sprintf(linkname,"slave_%s",slave->name);
209 ret = sysfs_create_link(&(master->class_dev.kobj), &(slave->class_dev.kobj),
210 linkname);
211 return ret;
212
213}
214
215void bond_destroy_slave_symlinks(struct net_device *master, struct net_device *slave)
216{
217 char linkname[IFNAMSIZ+7];
218
219 sysfs_remove_link(&(slave->class_dev.kobj), "master");
220 sprintf(linkname,"slave_%s",slave->name);
221 sysfs_remove_link(&(master->class_dev.kobj), linkname);
222}
223
224
225/*
226 * Show the slaves in the current bond.
227 */
228static ssize_t bonding_show_slaves(struct class_device *cd, char *buf)
229{
230 struct slave *slave;
231 int i, res = 0;
232 struct bonding *bond = to_bond(cd);
233
234 read_lock_bh(&bond->lock);
235 bond_for_each_slave(bond, slave, i) {
236 if (res > (PAGE_SIZE - IFNAMSIZ)) {
237 /* not enough space for another interface name */
238 if ((PAGE_SIZE - res) > 10)
239 res = PAGE_SIZE - 10;
240 res += sprintf(buf + res, "++more++");
241 break;
242 }
243 res += sprintf(buf + res, "%s ", slave->dev->name);
244 }
245 read_unlock_bh(&bond->lock);
246 res += sprintf(buf + res, "\n");
247 res++;
248 return res;
249}
250
251/*
252 * Set the slaves in the current bond. The bond interface must be
253 * up for this to succeed.
254 * This function is largely the same flow as bonding_update_bonds().
255 */
256static ssize_t bonding_store_slaves(struct class_device *cd, const char *buffer, size_t count)
257{
258 char command[IFNAMSIZ + 1] = { 0, };
259 char *ifname;
260 int i, res, found, ret = count;
261 struct slave *slave;
Luiz Fernando Capitulino3418db72006-02-01 00:54:34 -0800262 struct net_device *dev = NULL;
Mitch Williamsb76cdba2005-11-09 10:36:41 -0800263 struct bonding *bond = to_bond(cd);
264
265 /* Quick sanity check -- is the bond interface up? */
266 if (!(bond->dev->flags & IFF_UP)) {
267 printk(KERN_ERR DRV_NAME
268 ": %s: Unable to update slaves because interface is down.\n",
269 bond->dev->name);
270 ret = -EPERM;
271 goto out;
272 }
273
274 /* Note: We can't hold bond->lock here, as bond_create grabs it. */
275
276 sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
277 ifname = command + 1;
278 if ((strlen(command) <= 1) ||
279 !dev_valid_name(ifname))
280 goto err_no_cmd;
281
282 if (command[0] == '+') {
283
284 /* Got a slave name in ifname. Is it already in the list? */
285 found = 0;
286 read_lock_bh(&bond->lock);
287 bond_for_each_slave(bond, slave, i)
288 if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
289 printk(KERN_ERR DRV_NAME
290 ": %s: Interface %s is already enslaved!\n",
291 bond->dev->name, ifname);
292 ret = -EPERM;
293 read_unlock_bh(&bond->lock);
294 goto out;
295 }
296
297 read_unlock_bh(&bond->lock);
298 printk(KERN_INFO DRV_NAME ": %s: Adding slave %s.\n",
299 bond->dev->name, ifname);
300 dev = dev_get_by_name(ifname);
301 if (!dev) {
302 printk(KERN_INFO DRV_NAME
303 ": %s: Interface %s does not exist!\n",
304 bond->dev->name, ifname);
305 ret = -EPERM;
306 goto out;
307 }
308 else
309 dev_put(dev);
310
311 if (dev->flags & IFF_UP) {
312 printk(KERN_ERR DRV_NAME
313 ": %s: Error: Unable to enslave %s "
314 "because it is already up.\n",
315 bond->dev->name, dev->name);
316 ret = -EPERM;
317 goto out;
318 }
319 /* If this is the first slave, then we need to set
320 the master's hardware address to be the same as the
321 slave's. */
322 if (!(*((u32 *) & (bond->dev->dev_addr[0])))) {
323 memcpy(bond->dev->dev_addr, dev->dev_addr,
324 dev->addr_len);
325 }
326
327 /* Set the slave's MTU to match the bond */
328 if (dev->mtu != bond->dev->mtu) {
329 if (dev->change_mtu) {
330 res = dev->change_mtu(dev,
331 bond->dev->mtu);
332 if (res) {
333 ret = res;
334 goto out;
335 }
336 } else {
337 dev->mtu = bond->dev->mtu;
338 }
339 }
340 rtnl_lock();
341 res = bond_enslave(bond->dev, dev);
342 rtnl_unlock();
343 if (res) {
344 ret = res;
345 }
346 goto out;
347 }
348
349 if (command[0] == '-') {
350 dev = NULL;
351 bond_for_each_slave(bond, slave, i)
352 if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
353 dev = slave->dev;
354 break;
355 }
356 if (dev) {
357 printk(KERN_INFO DRV_NAME ": %s: Removing slave %s\n",
358 bond->dev->name, dev->name);
359 rtnl_lock();
360 res = bond_release(bond->dev, dev);
361 rtnl_unlock();
362 if (res) {
363 ret = res;
364 goto out;
365 }
366 /* set the slave MTU to the default */
367 if (dev->change_mtu) {
368 dev->change_mtu(dev, 1500);
369 } else {
370 dev->mtu = 1500;
371 }
372 }
373 else {
374 printk(KERN_ERR DRV_NAME ": unable to remove non-existent slave %s for bond %s.\n",
375 ifname, bond->dev->name);
376 ret = -ENODEV;
377 }
378 goto out;
379 }
380
381err_no_cmd:
382 printk(KERN_ERR DRV_NAME ": no command found in slaves file for bond %s. Use +ifname or -ifname.\n", bond->dev->name);
383 ret = -EPERM;
384
385out:
386 return ret;
387}
388
389static CLASS_DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves, bonding_store_slaves);
390
391/*
392 * Show and set the bonding mode. The bond interface must be down to
393 * change the mode.
394 */
395static ssize_t bonding_show_mode(struct class_device *cd, char *buf)
396{
397 struct bonding *bond = to_bond(cd);
398
399 return sprintf(buf, "%s %d\n",
400 bond_mode_tbl[bond->params.mode].modename,
401 bond->params.mode) + 1;
402}
403
404static ssize_t bonding_store_mode(struct class_device *cd, const char *buf, size_t count)
405{
406 int new_value, ret = count;
407 struct bonding *bond = to_bond(cd);
408
409 if (bond->dev->flags & IFF_UP) {
410 printk(KERN_ERR DRV_NAME
411 ": unable to update mode of %s because interface is up.\n",
412 bond->dev->name);
413 ret = -EPERM;
414 goto out;
415 }
416
417 new_value = bond_parse_parm((char *)buf, bond_mode_tbl);
418 if (new_value < 0) {
419 printk(KERN_ERR DRV_NAME
420 ": %s: Ignoring invalid mode value %.*s.\n",
421 bond->dev->name,
422 (int)strlen(buf) - 1, buf);
423 ret = -EINVAL;
424 goto out;
425 } else {
Jay Vosburgh8f903c72006-02-21 16:36:44 -0800426 if (bond->params.mode == BOND_MODE_8023AD)
427 bond_unset_master_3ad_flags(bond);
428
429 if (bond->params.mode == BOND_MODE_ALB)
430 bond_unset_master_alb_flags(bond);
431
Mitch Williamsb76cdba2005-11-09 10:36:41 -0800432 bond->params.mode = new_value;
433 bond_set_mode_ops(bond, bond->params.mode);
434 printk(KERN_INFO DRV_NAME ": %s: setting mode to %s (%d).\n",
435 bond->dev->name, bond_mode_tbl[new_value].modename, new_value);
436 }
437out:
438 return ret;
439}
440static CLASS_DEVICE_ATTR(mode, S_IRUGO | S_IWUSR, bonding_show_mode, bonding_store_mode);
441
442/*
443 * Show and set the bonding transmit hash method. The bond interface must be down to
444 * change the xmit hash policy.
445 */
446static ssize_t bonding_show_xmit_hash(struct class_device *cd, char *buf)
447{
448 int count;
449 struct bonding *bond = to_bond(cd);
450
451 if ((bond->params.mode != BOND_MODE_XOR) &&
452 (bond->params.mode != BOND_MODE_8023AD)) {
453 // Not Applicable
454 count = sprintf(buf, "NA\n") + 1;
455 } else {
456 count = sprintf(buf, "%s %d\n",
457 xmit_hashtype_tbl[bond->params.xmit_policy].modename,
458 bond->params.xmit_policy) + 1;
459 }
460
461 return count;
462}
463
464static ssize_t bonding_store_xmit_hash(struct class_device *cd, const char *buf, size_t count)
465{
466 int new_value, ret = count;
467 struct bonding *bond = to_bond(cd);
468
469 if (bond->dev->flags & IFF_UP) {
470 printk(KERN_ERR DRV_NAME
471 "%s: Interface is up. Unable to update xmit policy.\n",
472 bond->dev->name);
473 ret = -EPERM;
474 goto out;
475 }
476
477 if ((bond->params.mode != BOND_MODE_XOR) &&
478 (bond->params.mode != BOND_MODE_8023AD)) {
479 printk(KERN_ERR DRV_NAME
480 "%s: Transmit hash policy is irrelevant in this mode.\n",
481 bond->dev->name);
482 ret = -EPERM;
483 goto out;
484 }
485
486 new_value = bond_parse_parm((char *)buf, xmit_hashtype_tbl);
487 if (new_value < 0) {
488 printk(KERN_ERR DRV_NAME
489 ": %s: Ignoring invalid xmit hash policy value %.*s.\n",
490 bond->dev->name,
491 (int)strlen(buf) - 1, buf);
492 ret = -EINVAL;
493 goto out;
494 } else {
495 bond->params.xmit_policy = new_value;
496 bond_set_mode_ops(bond, bond->params.mode);
497 printk(KERN_INFO DRV_NAME ": %s: setting xmit hash policy to %s (%d).\n",
498 bond->dev->name, xmit_hashtype_tbl[new_value].modename, new_value);
499 }
500out:
501 return ret;
502}
503static CLASS_DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR, bonding_show_xmit_hash, bonding_store_xmit_hash);
504
505/*
506 * Show and set the arp timer interval. There are two tricky bits
507 * here. First, if ARP monitoring is activated, then we must disable
508 * MII monitoring. Second, if the ARP timer isn't running, we must
509 * start it.
510 */
511static ssize_t bonding_show_arp_interval(struct class_device *cd, char *buf)
512{
513 struct bonding *bond = to_bond(cd);
514
515 return sprintf(buf, "%d\n", bond->params.arp_interval) + 1;
516}
517
518static ssize_t bonding_store_arp_interval(struct class_device *cd, const char *buf, size_t count)
519{
520 int new_value, ret = count;
521 struct bonding *bond = to_bond(cd);
522
523 if (sscanf(buf, "%d", &new_value) != 1) {
524 printk(KERN_ERR DRV_NAME
525 ": %s: no arp_interval value specified.\n",
526 bond->dev->name);
527 ret = -EINVAL;
528 goto out;
529 }
530 if (new_value < 0) {
531 printk(KERN_ERR DRV_NAME
532 ": %s: Invalid arp_interval value %d not in range 1-%d; rejected.\n",
533 bond->dev->name, new_value, INT_MAX);
534 ret = -EINVAL;
535 goto out;
536 }
537
538 printk(KERN_INFO DRV_NAME
539 ": %s: Setting ARP monitoring interval to %d.\n",
540 bond->dev->name, new_value);
541 bond->params.arp_interval = new_value;
542 if (bond->params.miimon) {
543 printk(KERN_INFO DRV_NAME
544 ": %s: ARP monitoring cannot be used with MII monitoring. "
545 "%s Disabling MII monitoring.\n",
546 bond->dev->name, bond->dev->name);
547 bond->params.miimon = 0;
548 /* Kill MII timer, else it brings bond's link down */
549 if (bond->arp_timer.function) {
550 printk(KERN_INFO DRV_NAME
551 ": %s: Kill MII timer, else it brings bond's link down...\n",
552 bond->dev->name);
553 del_timer_sync(&bond->mii_timer);
554 }
555 }
556 if (!bond->params.arp_targets[0]) {
557 printk(KERN_INFO DRV_NAME
558 ": %s: ARP monitoring has been set up, "
559 "but no ARP targets have been specified.\n",
560 bond->dev->name);
561 }
562 if (bond->dev->flags & IFF_UP) {
563 /* If the interface is up, we may need to fire off
564 * the ARP timer. If the interface is down, the
565 * timer will get fired off when the open function
566 * is called.
567 */
568 if (bond->arp_timer.function) {
569 /* The timer's already set up, so fire it off */
570 mod_timer(&bond->arp_timer, jiffies + 1);
571 } else {
572 /* Set up the timer. */
573 init_timer(&bond->arp_timer);
574 bond->arp_timer.expires = jiffies + 1;
575 bond->arp_timer.data =
576 (unsigned long) bond->dev;
577 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) {
578 bond->arp_timer.function =
579 (void *)
580 &bond_activebackup_arp_mon;
581 } else {
582 bond->arp_timer.function =
583 (void *)
584 &bond_loadbalance_arp_mon;
585 }
586 add_timer(&bond->arp_timer);
587 }
588 }
589
590out:
591 return ret;
592}
593static CLASS_DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR , bonding_show_arp_interval, bonding_store_arp_interval);
594
595/*
596 * Show and set the arp targets.
597 */
598static ssize_t bonding_show_arp_targets(struct class_device *cd, char *buf)
599{
600 int i, res = 0;
601 struct bonding *bond = to_bond(cd);
602
603 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
604 if (bond->params.arp_targets[i])
605 res += sprintf(buf + res, "%u.%u.%u.%u ",
606 NIPQUAD(bond->params.arp_targets[i]));
607 }
608 if (res)
609 res--; /* eat the leftover space */
610 res += sprintf(buf + res, "\n");
611 res++;
612 return res;
613}
614
615static ssize_t bonding_store_arp_targets(struct class_device *cd, const char *buf, size_t count)
616{
617 u32 newtarget;
618 int i = 0, done = 0, ret = count;
619 struct bonding *bond = to_bond(cd);
620 u32 *targets;
621
622 targets = bond->params.arp_targets;
623 newtarget = in_aton(buf + 1);
624 /* look for adds */
625 if (buf[0] == '+') {
626 if ((newtarget == 0) || (newtarget == INADDR_BROADCAST)) {
627 printk(KERN_ERR DRV_NAME
628 ": %s: invalid ARP target %u.%u.%u.%u specified for addition\n",
629 bond->dev->name, NIPQUAD(newtarget));
630 ret = -EINVAL;
631 goto out;
632 }
633 /* look for an empty slot to put the target in, and check for dupes */
634 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
635 if (targets[i] == newtarget) { /* duplicate */
636 printk(KERN_ERR DRV_NAME
637 ": %s: ARP target %u.%u.%u.%u is already present\n",
638 bond->dev->name, NIPQUAD(newtarget));
639 if (done)
640 targets[i] = 0;
641 ret = -EINVAL;
642 goto out;
643 }
644 if (targets[i] == 0 && !done) {
645 printk(KERN_INFO DRV_NAME
646 ": %s: adding ARP target %d.%d.%d.%d.\n",
647 bond->dev->name, NIPQUAD(newtarget));
648 done = 1;
649 targets[i] = newtarget;
650 }
651 }
652 if (!done) {
653 printk(KERN_ERR DRV_NAME
654 ": %s: ARP target table is full!\n",
655 bond->dev->name);
656 ret = -EINVAL;
657 goto out;
658 }
659
660 }
661 else if (buf[0] == '-') {
662 if ((newtarget == 0) || (newtarget == INADDR_BROADCAST)) {
663 printk(KERN_ERR DRV_NAME
664 ": %s: invalid ARP target %d.%d.%d.%d specified for removal\n",
665 bond->dev->name, NIPQUAD(newtarget));
666 ret = -EINVAL;
667 goto out;
668 }
669
670 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
671 if (targets[i] == newtarget) {
672 printk(KERN_INFO DRV_NAME
673 ": %s: removing ARP target %d.%d.%d.%d.\n",
674 bond->dev->name, NIPQUAD(newtarget));
675 targets[i] = 0;
676 done = 1;
677 }
678 }
679 if (!done) {
680 printk(KERN_INFO DRV_NAME
681 ": %s: unable to remove nonexistent ARP target %d.%d.%d.%d.\n",
682 bond->dev->name, NIPQUAD(newtarget));
683 ret = -EINVAL;
684 goto out;
685 }
686 }
687 else {
688 printk(KERN_ERR DRV_NAME ": no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
689 bond->dev->name);
690 ret = -EPERM;
691 goto out;
692 }
693
694out:
695 return ret;
696}
697static CLASS_DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
698
699/*
700 * Show and set the up and down delays. These must be multiples of the
701 * MII monitoring value, and are stored internally as the multiplier.
702 * Thus, we must translate to MS for the real world.
703 */
704static ssize_t bonding_show_downdelay(struct class_device *cd, char *buf)
705{
706 struct bonding *bond = to_bond(cd);
707
708 return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon) + 1;
709}
710
711static ssize_t bonding_store_downdelay(struct class_device *cd, const char *buf, size_t count)
712{
713 int new_value, ret = count;
714 struct bonding *bond = to_bond(cd);
715
716 if (!(bond->params.miimon)) {
717 printk(KERN_ERR DRV_NAME
718 ": %s: Unable to set down delay as MII monitoring is disabled\n",
719 bond->dev->name);
720 ret = -EPERM;
721 goto out;
722 }
723
724 if (sscanf(buf, "%d", &new_value) != 1) {
725 printk(KERN_ERR DRV_NAME
726 ": %s: no down delay value specified.\n",
727 bond->dev->name);
728 ret = -EINVAL;
729 goto out;
730 }
731 if (new_value < 0) {
732 printk(KERN_ERR DRV_NAME
733 ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
734 bond->dev->name, new_value, 1, INT_MAX);
735 ret = -EINVAL;
736 goto out;
737 } else {
738 if ((new_value % bond->params.miimon) != 0) {
739 printk(KERN_WARNING DRV_NAME
740 ": %s: Warning: down delay (%d) is not a multiple "
741 "of miimon (%d), delay rounded to %d ms\n",
742 bond->dev->name, new_value, bond->params.miimon,
743 (new_value / bond->params.miimon) *
744 bond->params.miimon);
745 }
746 bond->params.downdelay = new_value / bond->params.miimon;
747 printk(KERN_INFO DRV_NAME ": %s: Setting down delay to %d.\n",
748 bond->dev->name, bond->params.downdelay * bond->params.miimon);
749
750 }
751
752out:
753 return ret;
754}
755static CLASS_DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR , bonding_show_downdelay, bonding_store_downdelay);
756
757static ssize_t bonding_show_updelay(struct class_device *cd, char *buf)
758{
759 struct bonding *bond = to_bond(cd);
760
761 return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon) + 1;
762
763}
764
765static ssize_t bonding_store_updelay(struct class_device *cd, const char *buf, size_t count)
766{
767 int new_value, ret = count;
768 struct bonding *bond = to_bond(cd);
769
770 if (!(bond->params.miimon)) {
771 printk(KERN_ERR DRV_NAME
772 ": %s: Unable to set up delay as MII monitoring is disabled\n",
773 bond->dev->name);
774 ret = -EPERM;
775 goto out;
776 }
777
778 if (sscanf(buf, "%d", &new_value) != 1) {
779 printk(KERN_ERR DRV_NAME
780 ": %s: no up delay value specified.\n",
781 bond->dev->name);
782 ret = -EINVAL;
783 goto out;
784 }
785 if (new_value < 0) {
786 printk(KERN_ERR DRV_NAME
787 ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
788 bond->dev->name, new_value, 1, INT_MAX);
789 ret = -EINVAL;
790 goto out;
791 } else {
792 if ((new_value % bond->params.miimon) != 0) {
793 printk(KERN_WARNING DRV_NAME
794 ": %s: Warning: up delay (%d) is not a multiple "
795 "of miimon (%d), updelay rounded to %d ms\n",
796 bond->dev->name, new_value, bond->params.miimon,
797 (new_value / bond->params.miimon) *
798 bond->params.miimon);
799 }
800 bond->params.updelay = new_value / bond->params.miimon;
801 printk(KERN_INFO DRV_NAME ": %s: Setting up delay to %d.\n",
802 bond->dev->name, bond->params.updelay * bond->params.miimon);
803
804 }
805
806out:
807 return ret;
808}
809static CLASS_DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR , bonding_show_updelay, bonding_store_updelay);
810
811/*
812 * Show and set the LACP interval. Interface must be down, and the mode
813 * must be set to 802.3ad mode.
814 */
815static ssize_t bonding_show_lacp(struct class_device *cd, char *buf)
816{
817 struct bonding *bond = to_bond(cd);
818
819 return sprintf(buf, "%s %d\n",
820 bond_lacp_tbl[bond->params.lacp_fast].modename,
821 bond->params.lacp_fast) + 1;
822}
823
824static ssize_t bonding_store_lacp(struct class_device *cd, const char *buf, size_t count)
825{
826 int new_value, ret = count;
827 struct bonding *bond = to_bond(cd);
828
829 if (bond->dev->flags & IFF_UP) {
830 printk(KERN_ERR DRV_NAME
831 ": %s: Unable to update LACP rate because interface is up.\n",
832 bond->dev->name);
833 ret = -EPERM;
834 goto out;
835 }
836
837 if (bond->params.mode != BOND_MODE_8023AD) {
838 printk(KERN_ERR DRV_NAME
839 ": %s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
840 bond->dev->name);
841 ret = -EPERM;
842 goto out;
843 }
844
845 new_value = bond_parse_parm((char *)buf, bond_lacp_tbl);
846
847 if ((new_value == 1) || (new_value == 0)) {
848 bond->params.lacp_fast = new_value;
849 printk(KERN_INFO DRV_NAME
850 ": %s: Setting LACP rate to %s (%d).\n",
851 bond->dev->name, bond_lacp_tbl[new_value].modename, new_value);
852 } else {
853 printk(KERN_ERR DRV_NAME
854 ": %s: Ignoring invalid LACP rate value %.*s.\n",
855 bond->dev->name, (int)strlen(buf) - 1, buf);
856 ret = -EINVAL;
857 }
858out:
859 return ret;
860}
861static CLASS_DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR, bonding_show_lacp, bonding_store_lacp);
862
863/*
864 * Show and set the MII monitor interval. There are two tricky bits
865 * here. First, if MII monitoring is activated, then we must disable
866 * ARP monitoring. Second, if the timer isn't running, we must
867 * start it.
868 */
869static ssize_t bonding_show_miimon(struct class_device *cd, char *buf)
870{
871 struct bonding *bond = to_bond(cd);
872
873 return sprintf(buf, "%d\n", bond->params.miimon) + 1;
874}
875
876static ssize_t bonding_store_miimon(struct class_device *cd, const char *buf, size_t count)
877{
878 int new_value, ret = count;
879 struct bonding *bond = to_bond(cd);
880
881 if (sscanf(buf, "%d", &new_value) != 1) {
882 printk(KERN_ERR DRV_NAME
883 ": %s: no miimon value specified.\n",
884 bond->dev->name);
885 ret = -EINVAL;
886 goto out;
887 }
888 if (new_value < 0) {
889 printk(KERN_ERR DRV_NAME
890 ": %s: Invalid miimon value %d not in range %d-%d; rejected.\n",
891 bond->dev->name, new_value, 1, INT_MAX);
892 ret = -EINVAL;
893 goto out;
894 } else {
895 printk(KERN_INFO DRV_NAME
896 ": %s: Setting MII monitoring interval to %d.\n",
897 bond->dev->name, new_value);
898 bond->params.miimon = new_value;
899 if(bond->params.updelay)
900 printk(KERN_INFO DRV_NAME
901 ": %s: Note: Updating updelay (to %d) "
902 "since it is a multiple of the miimon value.\n",
903 bond->dev->name,
904 bond->params.updelay * bond->params.miimon);
905 if(bond->params.downdelay)
906 printk(KERN_INFO DRV_NAME
907 ": %s: Note: Updating downdelay (to %d) "
908 "since it is a multiple of the miimon value.\n",
909 bond->dev->name,
910 bond->params.downdelay * bond->params.miimon);
911 if (bond->params.arp_interval) {
912 printk(KERN_INFO DRV_NAME
913 ": %s: MII monitoring cannot be used with "
914 "ARP monitoring. Disabling ARP monitoring...\n",
915 bond->dev->name);
916 bond->params.arp_interval = 0;
917 /* Kill ARP timer, else it brings bond's link down */
918 if (bond->mii_timer.function) {
919 printk(KERN_INFO DRV_NAME
920 ": %s: Kill ARP timer, else it brings bond's link down...\n",
921 bond->dev->name);
922 del_timer_sync(&bond->arp_timer);
923 }
924 }
925
926 if (bond->dev->flags & IFF_UP) {
927 /* If the interface is up, we may need to fire off
928 * the MII timer. If the interface is down, the
929 * timer will get fired off when the open function
930 * is called.
931 */
932 if (bond->mii_timer.function) {
933 /* The timer's already set up, so fire it off */
934 mod_timer(&bond->mii_timer, jiffies + 1);
935 } else {
936 /* Set up the timer. */
937 init_timer(&bond->mii_timer);
938 bond->mii_timer.expires = jiffies + 1;
939 bond->mii_timer.data =
940 (unsigned long) bond->dev;
941 bond->mii_timer.function =
942 (void *) &bond_mii_monitor;
943 add_timer(&bond->mii_timer);
944 }
945 }
946 }
947out:
948 return ret;
949}
950static CLASS_DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR, bonding_show_miimon, bonding_store_miimon);
951
952/*
953 * Show and set the primary slave. The store function is much
954 * simpler than bonding_store_slaves function because it only needs to
955 * handle one interface name.
956 * The bond must be a mode that supports a primary for this be
957 * set.
958 */
959static ssize_t bonding_show_primary(struct class_device *cd, char *buf)
960{
961 int count = 0;
962 struct bonding *bond = to_bond(cd);
963
964 if (bond->primary_slave)
965 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name) + 1;
966 else
967 count = sprintf(buf, "\n") + 1;
968
969 return count;
970}
971
972static ssize_t bonding_store_primary(struct class_device *cd, const char *buf, size_t count)
973{
974 int i;
975 struct slave *slave;
976 struct bonding *bond = to_bond(cd);
977
978 write_lock_bh(&bond->lock);
979 if (!USES_PRIMARY(bond->params.mode)) {
980 printk(KERN_INFO DRV_NAME
981 ": %s: Unable to set primary slave; %s is in mode %d\n",
982 bond->dev->name, bond->dev->name, bond->params.mode);
983 } else {
984 bond_for_each_slave(bond, slave, i) {
985 if (strnicmp
986 (slave->dev->name, buf,
987 strlen(slave->dev->name)) == 0) {
988 printk(KERN_INFO DRV_NAME
989 ": %s: Setting %s as primary slave.\n",
990 bond->dev->name, slave->dev->name);
991 bond->primary_slave = slave;
992 bond_select_active_slave(bond);
993 goto out;
994 }
995 }
996
997 /* if we got here, then we didn't match the name of any slave */
998
999 if (strlen(buf) == 0 || buf[0] == '\n') {
1000 printk(KERN_INFO DRV_NAME
1001 ": %s: Setting primary slave to None.\n",
1002 bond->dev->name);
Luiz Fernando Capitulino3418db72006-02-01 00:54:34 -08001003 bond->primary_slave = NULL;
Mitch Williamsb76cdba2005-11-09 10:36:41 -08001004 bond_select_active_slave(bond);
1005 } else {
1006 printk(KERN_INFO DRV_NAME
1007 ": %s: Unable to set %.*s as primary slave as it is not a slave.\n",
1008 bond->dev->name, (int)strlen(buf) - 1, buf);
1009 }
1010 }
1011out:
1012 write_unlock_bh(&bond->lock);
1013 return count;
1014}
1015static CLASS_DEVICE_ATTR(primary, S_IRUGO | S_IWUSR, bonding_show_primary, bonding_store_primary);
1016
1017/*
1018 * Show and set the use_carrier flag.
1019 */
1020static ssize_t bonding_show_carrier(struct class_device *cd, char *buf)
1021{
1022 struct bonding *bond = to_bond(cd);
1023
1024 return sprintf(buf, "%d\n", bond->params.use_carrier) + 1;
1025}
1026
1027static ssize_t bonding_store_carrier(struct class_device *cd, const char *buf, size_t count)
1028{
1029 int new_value, ret = count;
1030 struct bonding *bond = to_bond(cd);
1031
1032
1033 if (sscanf(buf, "%d", &new_value) != 1) {
1034 printk(KERN_ERR DRV_NAME
1035 ": %s: no use_carrier value specified.\n",
1036 bond->dev->name);
1037 ret = -EINVAL;
1038 goto out;
1039 }
1040 if ((new_value == 0) || (new_value == 1)) {
1041 bond->params.use_carrier = new_value;
1042 printk(KERN_INFO DRV_NAME ": %s: Setting use_carrier to %d.\n",
1043 bond->dev->name, new_value);
1044 } else {
1045 printk(KERN_INFO DRV_NAME
1046 ": %s: Ignoring invalid use_carrier value %d.\n",
1047 bond->dev->name, new_value);
1048 }
1049out:
1050 return count;
1051}
1052static CLASS_DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR, bonding_show_carrier, bonding_store_carrier);
1053
1054
1055/*
1056 * Show and set currently active_slave.
1057 */
1058static ssize_t bonding_show_active_slave(struct class_device *cd, char *buf)
1059{
1060 struct slave *curr;
1061 struct bonding *bond = to_bond(cd);
1062 int count;
1063
1064
1065 read_lock(&bond->curr_slave_lock);
1066 curr = bond->curr_active_slave;
1067 read_unlock(&bond->curr_slave_lock);
1068
1069 if (USES_PRIMARY(bond->params.mode) && curr)
1070 count = sprintf(buf, "%s\n", curr->dev->name) + 1;
1071 else
1072 count = sprintf(buf, "\n") + 1;
1073 return count;
1074}
1075
1076static ssize_t bonding_store_active_slave(struct class_device *cd, const char *buf, size_t count)
1077{
1078 int i;
1079 struct slave *slave;
1080 struct slave *old_active = NULL;
1081 struct slave *new_active = NULL;
1082 struct bonding *bond = to_bond(cd);
1083
1084 write_lock_bh(&bond->lock);
1085 if (!USES_PRIMARY(bond->params.mode)) {
1086 printk(KERN_INFO DRV_NAME
1087 ": %s: Unable to change active slave; %s is in mode %d\n",
1088 bond->dev->name, bond->dev->name, bond->params.mode);
1089 } else {
1090 bond_for_each_slave(bond, slave, i) {
1091 if (strnicmp
1092 (slave->dev->name, buf,
1093 strlen(slave->dev->name)) == 0) {
1094 old_active = bond->curr_active_slave;
1095 new_active = slave;
Jay Vosburgha50d8de2006-09-22 21:53:25 -07001096 if (new_active == old_active) {
Mitch Williamsb76cdba2005-11-09 10:36:41 -08001097 /* do nothing */
1098 printk(KERN_INFO DRV_NAME
1099 ": %s: %s is already the current active slave.\n",
1100 bond->dev->name, slave->dev->name);
1101 goto out;
1102 }
1103 else {
1104 if ((new_active) &&
1105 (old_active) &&
1106 (new_active->link == BOND_LINK_UP) &&
1107 IS_UP(new_active->dev)) {
1108 printk(KERN_INFO DRV_NAME
1109 ": %s: Setting %s as active slave.\n",
1110 bond->dev->name, slave->dev->name);
1111 bond_change_active_slave(bond, new_active);
1112 }
1113 else {
1114 printk(KERN_INFO DRV_NAME
1115 ": %s: Could not set %s as active slave; "
1116 "either %s is down or the link is down.\n",
1117 bond->dev->name, slave->dev->name,
1118 slave->dev->name);
1119 }
1120 goto out;
1121 }
1122 }
1123 }
1124
1125 /* if we got here, then we didn't match the name of any slave */
1126
1127 if (strlen(buf) == 0 || buf[0] == '\n') {
1128 printk(KERN_INFO DRV_NAME
1129 ": %s: Setting active slave to None.\n",
1130 bond->dev->name);
Luiz Fernando Capitulino3418db72006-02-01 00:54:34 -08001131 bond->primary_slave = NULL;
Mitch Williamsb76cdba2005-11-09 10:36:41 -08001132 bond_select_active_slave(bond);
1133 } else {
1134 printk(KERN_INFO DRV_NAME
1135 ": %s: Unable to set %.*s as active slave as it is not a slave.\n",
1136 bond->dev->name, (int)strlen(buf) - 1, buf);
1137 }
1138 }
1139out:
1140 write_unlock_bh(&bond->lock);
1141 return count;
1142
1143}
1144static CLASS_DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR, bonding_show_active_slave, bonding_store_active_slave);
1145
1146
1147/*
1148 * Show link status of the bond interface.
1149 */
1150static ssize_t bonding_show_mii_status(struct class_device *cd, char *buf)
1151{
1152 struct slave *curr;
1153 struct bonding *bond = to_bond(cd);
1154
1155 read_lock(&bond->curr_slave_lock);
1156 curr = bond->curr_active_slave;
1157 read_unlock(&bond->curr_slave_lock);
1158
1159 return sprintf(buf, "%s\n", (curr) ? "up" : "down") + 1;
1160}
1161static CLASS_DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1162
1163
1164/*
1165 * Show current 802.3ad aggregator ID.
1166 */
1167static ssize_t bonding_show_ad_aggregator(struct class_device *cd, char *buf)
1168{
1169 int count = 0;
1170 struct bonding *bond = to_bond(cd);
1171
1172 if (bond->params.mode == BOND_MODE_8023AD) {
1173 struct ad_info ad_info;
1174 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ? 0 : ad_info.aggregator_id) + 1;
1175 }
1176 else
1177 count = sprintf(buf, "\n") + 1;
1178
1179 return count;
1180}
1181static CLASS_DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1182
1183
1184/*
1185 * Show number of active 802.3ad ports.
1186 */
1187static ssize_t bonding_show_ad_num_ports(struct class_device *cd, char *buf)
1188{
1189 int count = 0;
1190 struct bonding *bond = to_bond(cd);
1191
1192 if (bond->params.mode == BOND_MODE_8023AD) {
1193 struct ad_info ad_info;
1194 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ? 0: ad_info.ports) + 1;
1195 }
1196 else
1197 count = sprintf(buf, "\n") + 1;
1198
1199 return count;
1200}
1201static CLASS_DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1202
1203
1204/*
1205 * Show current 802.3ad actor key.
1206 */
1207static ssize_t bonding_show_ad_actor_key(struct class_device *cd, char *buf)
1208{
1209 int count = 0;
1210 struct bonding *bond = to_bond(cd);
1211
1212 if (bond->params.mode == BOND_MODE_8023AD) {
1213 struct ad_info ad_info;
1214 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ? 0 : ad_info.actor_key) + 1;
1215 }
1216 else
1217 count = sprintf(buf, "\n") + 1;
1218
1219 return count;
1220}
1221static CLASS_DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1222
1223
1224/*
1225 * Show current 802.3ad partner key.
1226 */
1227static ssize_t bonding_show_ad_partner_key(struct class_device *cd, char *buf)
1228{
1229 int count = 0;
1230 struct bonding *bond = to_bond(cd);
1231
1232 if (bond->params.mode == BOND_MODE_8023AD) {
1233 struct ad_info ad_info;
1234 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ? 0 : ad_info.partner_key) + 1;
1235 }
1236 else
1237 count = sprintf(buf, "\n") + 1;
1238
1239 return count;
1240}
1241static CLASS_DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1242
1243
1244/*
1245 * Show current 802.3ad partner mac.
1246 */
1247static ssize_t bonding_show_ad_partner_mac(struct class_device *cd, char *buf)
1248{
1249 int count = 0;
1250 struct bonding *bond = to_bond(cd);
1251
1252 if (bond->params.mode == BOND_MODE_8023AD) {
1253 struct ad_info ad_info;
1254 if (!bond_3ad_get_active_agg_info(bond, &ad_info)) {
1255 count = sprintf(buf,"%02x:%02x:%02x:%02x:%02x:%02x\n",
1256 ad_info.partner_system[0],
1257 ad_info.partner_system[1],
1258 ad_info.partner_system[2],
1259 ad_info.partner_system[3],
1260 ad_info.partner_system[4],
1261 ad_info.partner_system[5]) + 1;
1262 }
1263 }
1264 else
1265 count = sprintf(buf, "\n") + 1;
1266
1267 return count;
1268}
1269static CLASS_DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1270
1271
1272
1273static struct attribute *per_bond_attrs[] = {
1274 &class_device_attr_slaves.attr,
1275 &class_device_attr_mode.attr,
1276 &class_device_attr_arp_interval.attr,
1277 &class_device_attr_arp_ip_target.attr,
1278 &class_device_attr_downdelay.attr,
1279 &class_device_attr_updelay.attr,
1280 &class_device_attr_lacp_rate.attr,
1281 &class_device_attr_xmit_hash_policy.attr,
1282 &class_device_attr_miimon.attr,
1283 &class_device_attr_primary.attr,
1284 &class_device_attr_use_carrier.attr,
1285 &class_device_attr_active_slave.attr,
1286 &class_device_attr_mii_status.attr,
1287 &class_device_attr_ad_aggregator.attr,
1288 &class_device_attr_ad_num_ports.attr,
1289 &class_device_attr_ad_actor_key.attr,
1290 &class_device_attr_ad_partner_key.attr,
1291 &class_device_attr_ad_partner_mac.attr,
1292 NULL,
1293};
1294
1295static struct attribute_group bonding_group = {
1296 .name = "bonding",
1297 .attrs = per_bond_attrs,
1298};
1299
1300/*
1301 * Initialize sysfs. This sets up the bonding_masters file in
1302 * /sys/class/net.
1303 */
1304int bond_create_sysfs(void)
1305{
1306 int ret = 0;
1307 struct bonding *firstbond;
1308
1309 init_rwsem(&bonding_rwsem);
1310
1311 /* get the netdev class pointer */
1312 firstbond = container_of(bond_dev_list.next, struct bonding, bond_list);
1313 if (!firstbond)
1314 return -ENODEV;
1315
1316 netdev_class = firstbond->dev->class_dev.class;
1317 if (!netdev_class)
1318 return -ENODEV;
1319
1320 ret = class_create_file(netdev_class, &class_attr_bonding_masters);
1321
1322 return ret;
1323
1324}
1325
1326/*
1327 * Remove /sys/class/net/bonding_masters.
1328 */
1329void bond_destroy_sysfs(void)
1330{
1331 if (netdev_class)
1332 class_remove_file(netdev_class, &class_attr_bonding_masters);
1333}
1334
1335/*
1336 * Initialize sysfs for each bond. This sets up and registers
1337 * the 'bondctl' directory for each individual bond under /sys/class/net.
1338 */
1339int bond_create_sysfs_entry(struct bonding *bond)
1340{
1341 struct net_device *dev = bond->dev;
1342 int err;
1343
1344 err = sysfs_create_group(&(dev->class_dev.kobj), &bonding_group);
1345 if (err) {
1346 printk(KERN_EMERG "eek! didn't create group!\n");
1347 }
1348
1349 if (expected_refcount < 1)
1350 expected_refcount = atomic_read(&bond->dev->class_dev.kobj.kref.refcount);
1351
1352 return err;
1353}
1354/*
1355 * Remove sysfs entries for each bond.
1356 */
1357void bond_destroy_sysfs_entry(struct bonding *bond)
1358{
1359 struct net_device *dev = bond->dev;
1360
1361 sysfs_remove_group(&(dev->class_dev.kobj), &bonding_group);
1362}
1363