Merge branch 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/roland/infiniband
[linux-2.6] / drivers / net / bonding / bond_sysfs.c
1
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  *
22  */
23 #include <linux/config.h>
24 #include <linux/kernel.h>
25 #include <linux/module.h>
26 #include <linux/sched.h>
27 #include <linux/device.h>
28 #include <linux/sysdev.h>
29 #include <linux/fs.h>
30 #include <linux/types.h>
31 #include <linux/string.h>
32 #include <linux/netdevice.h>
33 #include <linux/inetdevice.h>
34 #include <linux/in.h>
35 #include <linux/sysfs.h>
36 #include <linux/string.h>
37 #include <linux/ctype.h>
38 #include <linux/inet.h>
39 #include <linux/rtnetlink.h>
40
41 /* #define BONDING_DEBUG 1 */
42 #include "bonding.h"
43 #define to_class_dev(obj) container_of(obj,struct class_device,kobj)
44 #define to_net_dev(class) container_of(class, struct net_device, class_dev)
45 #define to_bond(cd)     ((struct bonding *)(to_net_dev(cd)->priv))
46
47 /*---------------------------- Declarations -------------------------------*/
48
49
50 extern struct list_head bond_dev_list;
51 extern struct bond_params bonding_defaults;
52 extern struct bond_parm_tbl bond_mode_tbl[];
53 extern struct bond_parm_tbl bond_lacp_tbl[];
54 extern struct bond_parm_tbl xmit_hashtype_tbl[];
55
56 static int expected_refcount = -1;
57 static struct class *netdev_class;
58 /*--------------------------- Data Structures -----------------------------*/
59
60 /* Bonding sysfs lock.  Why can't we just use the subsytem lock?
61  * Because kobject_register tries to acquire the subsystem lock.  If
62  * we already hold the lock (which we would if the user was creating
63  * a new bond through the sysfs interface), we deadlock.
64  * This lock is only needed when deleting a bond - we need to make sure
65  * that we don't collide with an ongoing ioctl.
66  */
67
68 struct rw_semaphore bonding_rwsem;
69
70
71
72
73 /*------------------------------ Functions --------------------------------*/
74
75 /*
76  * "show" function for the bond_masters attribute.
77  * The class parameter is ignored.
78  */
79 static ssize_t bonding_show_bonds(struct class *cls, char *buffer)
80 {
81         int res = 0;
82         struct bonding *bond;
83
84         down_read(&(bonding_rwsem));
85
86         list_for_each_entry(bond, &bond_dev_list, bond_list) {
87                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
88                         /* not enough space for another interface name */
89                         if ((PAGE_SIZE - res) > 10)
90                                 res = PAGE_SIZE - 10;
91                         res += sprintf(buffer + res, "++more++");
92                         break;
93                 }
94                 res += sprintf(buffer + res, "%s ",
95                                bond->dev->name);
96         }
97         res += sprintf(buffer + res, "\n");
98         res++;
99         up_read(&(bonding_rwsem));
100         return res;
101 }
102
103 /*
104  * "store" function for the bond_masters attribute.  This is what
105  * creates and deletes entire bonds.
106  *
107  * The class parameter is ignored.
108  *
109  */
110
111 static ssize_t bonding_store_bonds(struct class *cls, const char *buffer, size_t count)
112 {
113         char command[IFNAMSIZ + 1] = {0, };
114         char *ifname;
115         int res = count;
116         struct bonding *bond;
117         struct bonding *nxt;
118
119         down_write(&(bonding_rwsem));
120         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
121         ifname = command + 1;
122         if ((strlen(command) <= 1) ||
123             !dev_valid_name(ifname))
124                 goto err_no_cmd;
125
126         if (command[0] == '+') {
127
128                 /* Check to see if the bond already exists. */
129                 list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list)
130                         if (strnicmp(bond->dev->name, ifname, IFNAMSIZ) == 0) {
131                                 printk(KERN_ERR DRV_NAME
132                                         ": cannot add bond %s; it already exists\n",
133                                         ifname);
134                                 res = -EPERM;
135                                 goto out;
136                         }
137
138                 printk(KERN_INFO DRV_NAME
139                         ": %s is being created...\n", ifname);
140                 if (bond_create(ifname, &bonding_defaults, &bond)) {
141                         printk(KERN_INFO DRV_NAME
142                         ": %s interface already exists. Bond creation failed.\n",
143                         ifname);
144                         res = -EPERM;
145                 }
146                 goto out;
147         }
148
149         if (command[0] == '-') {
150                 list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list)
151                         if (strnicmp(bond->dev->name, ifname, IFNAMSIZ) == 0) {
152                                 rtnl_lock();
153                                 /* check the ref count on the bond's kobject.
154                                  * If it's > expected, then there's a file open,
155                                  * and we have to fail.
156                                  */
157                                 if (atomic_read(&bond->dev->class_dev.kobj.kref.refcount)
158                                                         > expected_refcount){
159                                         rtnl_unlock();
160                                         printk(KERN_INFO DRV_NAME
161                                                 ": Unable remove bond %s due to open references.\n",
162                                                 ifname);
163                                         res = -EPERM;
164                                         goto out;
165                                 }
166                                 printk(KERN_INFO DRV_NAME
167                                         ": %s is being deleted...\n",
168                                         bond->dev->name);
169                                 unregister_netdevice(bond->dev);
170                                 bond_deinit(bond->dev);
171                                 bond_destroy_sysfs_entry(bond);
172                                 rtnl_unlock();
173                                 goto out;
174                         }
175
176                 printk(KERN_ERR DRV_NAME
177                         ": unable to delete non-existent bond %s\n", ifname);
178                 res = -ENODEV;
179                 goto out;
180         }
181
182 err_no_cmd:
183         printk(KERN_ERR DRV_NAME
184                 ": no command found in bonding_masters. Use +ifname or -ifname.\n");
185         res = -EPERM;
186
187         /* Always return either count or an error.  If you return 0, you'll
188          * get called forever, which is bad.
189          */
190 out:
191         up_write(&(bonding_rwsem));
192         return res;
193 }
194 /* class attribute for bond_masters file.  This ends up in /sys/class/net */
195 static CLASS_ATTR(bonding_masters,  S_IWUSR | S_IRUGO,
196                   bonding_show_bonds, bonding_store_bonds);
197
198 int bond_create_slave_symlinks(struct net_device *master, struct net_device *slave)
199 {
200         char linkname[IFNAMSIZ+7];
201         int ret = 0;
202
203         /* first, create a link from the slave back to the master */
204         ret = sysfs_create_link(&(slave->class_dev.kobj), &(master->class_dev.kobj),
205                                 "master");
206         if (ret)
207                 return ret;
208         /* next, create a link from the master to the slave */
209         sprintf(linkname,"slave_%s",slave->name);
210         ret = sysfs_create_link(&(master->class_dev.kobj), &(slave->class_dev.kobj),
211                                 linkname);
212         return ret;
213
214 }
215
216 void bond_destroy_slave_symlinks(struct net_device *master, struct net_device *slave)
217 {
218         char linkname[IFNAMSIZ+7];
219
220         sysfs_remove_link(&(slave->class_dev.kobj), "master");
221         sprintf(linkname,"slave_%s",slave->name);
222         sysfs_remove_link(&(master->class_dev.kobj), linkname);
223 }
224
225
226 /*
227  * Show the slaves in the current bond.
228  */
229 static ssize_t bonding_show_slaves(struct class_device *cd, char *buf)
230 {
231         struct slave *slave;
232         int i, res = 0;
233         struct bonding *bond = to_bond(cd);
234
235         read_lock_bh(&bond->lock);
236         bond_for_each_slave(bond, slave, i) {
237                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
238                         /* not enough space for another interface name */
239                         if ((PAGE_SIZE - res) > 10)
240                                 res = PAGE_SIZE - 10;
241                         res += sprintf(buf + res, "++more++");
242                         break;
243                 }
244                 res += sprintf(buf + res, "%s ", slave->dev->name);
245         }
246         read_unlock_bh(&bond->lock);
247         res += sprintf(buf + res, "\n");
248         res++;
249         return res;
250 }
251
252 /*
253  * Set the slaves in the current bond.  The bond interface must be
254  * up for this to succeed.
255  * This function is largely the same flow as bonding_update_bonds().
256  */
257 static ssize_t bonding_store_slaves(struct class_device *cd, const char *buffer, size_t count)
258 {
259         char command[IFNAMSIZ + 1] = { 0, };
260         char *ifname;
261         int i, res, found, ret = count;
262         struct slave *slave;
263         struct net_device *dev = NULL;
264         struct bonding *bond = to_bond(cd);
265
266         /* Quick sanity check -- is the bond interface up? */
267         if (!(bond->dev->flags & IFF_UP)) {
268                 printk(KERN_ERR DRV_NAME
269                        ": %s: Unable to update slaves because interface is down.\n",
270                        bond->dev->name);
271                 ret = -EPERM;
272                 goto out;
273         }
274
275         /* Note:  We can't hold bond->lock here, as bond_create grabs it. */
276
277         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
278         ifname = command + 1;
279         if ((strlen(command) <= 1) ||
280             !dev_valid_name(ifname))
281                 goto err_no_cmd;
282
283         if (command[0] == '+') {
284
285                 /* Got a slave name in ifname.  Is it already in the list? */
286                 found = 0;
287                 read_lock_bh(&bond->lock);
288                 bond_for_each_slave(bond, slave, i)
289                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
290                                 printk(KERN_ERR DRV_NAME
291                                        ": %s: Interface %s is already enslaved!\n",
292                                        bond->dev->name, ifname);
293                                 ret = -EPERM;
294                                 read_unlock_bh(&bond->lock);
295                                 goto out;
296                         }
297
298                 read_unlock_bh(&bond->lock);
299                 printk(KERN_INFO DRV_NAME ": %s: Adding slave %s.\n",
300                        bond->dev->name, ifname);
301                 dev = dev_get_by_name(ifname);
302                 if (!dev) {
303                         printk(KERN_INFO DRV_NAME
304                                ": %s: Interface %s does not exist!\n",
305                                bond->dev->name, ifname);
306                         ret = -EPERM;
307                         goto out;
308                 }
309                 else
310                         dev_put(dev);
311
312                 if (dev->flags & IFF_UP) {
313                         printk(KERN_ERR DRV_NAME
314                                ": %s: Error: Unable to enslave %s "
315                                "because it is already up.\n",
316                                bond->dev->name, dev->name);
317                         ret = -EPERM;
318                         goto out;
319                 }
320                 /* If this is the first slave, then we need to set
321                    the master's hardware address to be the same as the
322                    slave's. */
323                 if (!(*((u32 *) & (bond->dev->dev_addr[0])))) {
324                         memcpy(bond->dev->dev_addr, dev->dev_addr,
325                                dev->addr_len);
326                 }
327
328                 /* Set the slave's MTU to match the bond */
329                 if (dev->mtu != bond->dev->mtu) {
330                         if (dev->change_mtu) {
331                                 res = dev->change_mtu(dev,
332                                                       bond->dev->mtu);
333                                 if (res) {
334                                         ret = res;
335                                         goto out;
336                                 }
337                         } else {
338                                 dev->mtu = bond->dev->mtu;
339                         }
340                 }
341                 rtnl_lock();
342                 res = bond_enslave(bond->dev, dev);
343                 rtnl_unlock();
344                 if (res) {
345                         ret = res;
346                 }
347                 goto out;
348         }
349
350         if (command[0] == '-') {
351                 dev = NULL;
352                 bond_for_each_slave(bond, slave, i)
353                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
354                                 dev = slave->dev;
355                                 break;
356                         }
357                 if (dev) {
358                         printk(KERN_INFO DRV_NAME ": %s: Removing slave %s\n",
359                                 bond->dev->name, dev->name);
360                         rtnl_lock();
361                         res = bond_release(bond->dev, dev);
362                         rtnl_unlock();
363                         if (res) {
364                                 ret = res;
365                                 goto out;
366                         }
367                         /* set the slave MTU to the default */
368                         if (dev->change_mtu) {
369                                 dev->change_mtu(dev, 1500);
370                         } else {
371                                 dev->mtu = 1500;
372                         }
373                 }
374                 else {
375                         printk(KERN_ERR DRV_NAME ": unable to remove non-existent slave %s for bond %s.\n",
376                                 ifname, bond->dev->name);
377                         ret = -ENODEV;
378                 }
379                 goto out;
380         }
381
382 err_no_cmd:
383         printk(KERN_ERR DRV_NAME ": no command found in slaves file for bond %s. Use +ifname or -ifname.\n", bond->dev->name);
384         ret = -EPERM;
385
386 out:
387         return ret;
388 }
389
390 static CLASS_DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves, bonding_store_slaves);
391
392 /*
393  * Show and set the bonding mode.  The bond interface must be down to
394  * change the mode.
395  */
396 static ssize_t bonding_show_mode(struct class_device *cd, char *buf)
397 {
398         struct bonding *bond = to_bond(cd);
399
400         return sprintf(buf, "%s %d\n",
401                         bond_mode_tbl[bond->params.mode].modename,
402                         bond->params.mode) + 1;
403 }
404
405 static ssize_t bonding_store_mode(struct class_device *cd, const char *buf, size_t count)
406 {
407         int new_value, ret = count;
408         struct bonding *bond = to_bond(cd);
409
410         if (bond->dev->flags & IFF_UP) {
411                 printk(KERN_ERR DRV_NAME
412                        ": unable to update mode of %s because interface is up.\n",
413                        bond->dev->name);
414                 ret = -EPERM;
415                 goto out;
416         }
417
418         new_value = bond_parse_parm((char *)buf, bond_mode_tbl);
419         if (new_value < 0)  {
420                 printk(KERN_ERR DRV_NAME
421                        ": %s: Ignoring invalid mode value %.*s.\n",
422                        bond->dev->name,
423                        (int)strlen(buf) - 1, buf);
424                 ret = -EINVAL;
425                 goto out;
426         } else {
427                 if (bond->params.mode == BOND_MODE_8023AD)
428                         bond_unset_master_3ad_flags(bond);
429
430                 if (bond->params.mode == BOND_MODE_ALB)
431                         bond_unset_master_alb_flags(bond);
432
433                 bond->params.mode = new_value;
434                 bond_set_mode_ops(bond, bond->params.mode);
435                 printk(KERN_INFO DRV_NAME ": %s: setting mode to %s (%d).\n",
436                         bond->dev->name, bond_mode_tbl[new_value].modename, new_value);
437         }
438 out:
439         return ret;
440 }
441 static CLASS_DEVICE_ATTR(mode, S_IRUGO | S_IWUSR, bonding_show_mode, bonding_store_mode);
442
443 /*
444  * Show and set the bonding transmit hash method.  The bond interface must be down to
445  * change the xmit hash policy.
446  */
447 static ssize_t bonding_show_xmit_hash(struct class_device *cd, char *buf)
448 {
449         int count;
450         struct bonding *bond = to_bond(cd);
451
452         if ((bond->params.mode != BOND_MODE_XOR) &&
453             (bond->params.mode != BOND_MODE_8023AD)) {
454                 // Not Applicable
455                 count = sprintf(buf, "NA\n") + 1;
456         } else {
457                 count = sprintf(buf, "%s %d\n",
458                         xmit_hashtype_tbl[bond->params.xmit_policy].modename,
459                         bond->params.xmit_policy) + 1;
460         }
461
462         return count;
463 }
464
465 static ssize_t bonding_store_xmit_hash(struct class_device *cd, const char *buf, size_t count)
466 {
467         int new_value, ret = count;
468         struct bonding *bond = to_bond(cd);
469
470         if (bond->dev->flags & IFF_UP) {
471                 printk(KERN_ERR DRV_NAME
472                        "%s: Interface is up. Unable to update xmit policy.\n",
473                        bond->dev->name);
474                 ret = -EPERM;
475                 goto out;
476         }
477
478         if ((bond->params.mode != BOND_MODE_XOR) &&
479             (bond->params.mode != BOND_MODE_8023AD)) {
480                 printk(KERN_ERR DRV_NAME
481                        "%s: Transmit hash policy is irrelevant in this mode.\n",
482                        bond->dev->name);
483                 ret = -EPERM;
484                 goto out;
485         }
486
487         new_value = bond_parse_parm((char *)buf, xmit_hashtype_tbl);
488         if (new_value < 0)  {
489                 printk(KERN_ERR DRV_NAME
490                        ": %s: Ignoring invalid xmit hash policy value %.*s.\n",
491                        bond->dev->name,
492                        (int)strlen(buf) - 1, buf);
493                 ret = -EINVAL;
494                 goto out;
495         } else {
496                 bond->params.xmit_policy = new_value;
497                 bond_set_mode_ops(bond, bond->params.mode);
498                 printk(KERN_INFO DRV_NAME ": %s: setting xmit hash policy to %s (%d).\n",
499                         bond->dev->name, xmit_hashtype_tbl[new_value].modename, new_value);
500         }
501 out:
502         return ret;
503 }
504 static CLASS_DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR, bonding_show_xmit_hash, bonding_store_xmit_hash);
505
506 /*
507  * Show and set the arp timer interval.  There are two tricky bits
508  * here.  First, if ARP monitoring is activated, then we must disable
509  * MII monitoring.  Second, if the ARP timer isn't running, we must
510  * start it.
511  */
512 static ssize_t bonding_show_arp_interval(struct class_device *cd, char *buf)
513 {
514         struct bonding *bond = to_bond(cd);
515
516         return sprintf(buf, "%d\n", bond->params.arp_interval) + 1;
517 }
518
519 static ssize_t bonding_store_arp_interval(struct class_device *cd, const char *buf, size_t count)
520 {
521         int new_value, ret = count;
522         struct bonding *bond = to_bond(cd);
523
524         if (sscanf(buf, "%d", &new_value) != 1) {
525                 printk(KERN_ERR DRV_NAME
526                        ": %s: no arp_interval value specified.\n",
527                        bond->dev->name);
528                 ret = -EINVAL;
529                 goto out;
530         }
531         if (new_value < 0) {
532                 printk(KERN_ERR DRV_NAME
533                        ": %s: Invalid arp_interval value %d not in range 1-%d; rejected.\n",
534                        bond->dev->name, new_value, INT_MAX);
535                 ret = -EINVAL;
536                 goto out;
537         }
538
539         printk(KERN_INFO DRV_NAME
540                ": %s: Setting ARP monitoring interval to %d.\n",
541                bond->dev->name, new_value);
542         bond->params.arp_interval = new_value;
543         if (bond->params.miimon) {
544                 printk(KERN_INFO DRV_NAME
545                        ": %s: ARP monitoring cannot be used with MII monitoring. "
546                        "%s Disabling MII monitoring.\n",
547                        bond->dev->name, bond->dev->name);
548                 bond->params.miimon = 0;
549                 /* Kill MII timer, else it brings bond's link down */
550                 if (bond->arp_timer.function) {
551                         printk(KERN_INFO DRV_NAME
552                         ": %s: Kill MII timer, else it brings bond's link down...\n",
553                        bond->dev->name);
554                         del_timer_sync(&bond->mii_timer);
555                 }
556         }
557         if (!bond->params.arp_targets[0]) {
558                 printk(KERN_INFO DRV_NAME
559                        ": %s: ARP monitoring has been set up, "
560                        "but no ARP targets have been specified.\n",
561                        bond->dev->name);
562         }
563         if (bond->dev->flags & IFF_UP) {
564                 /* If the interface is up, we may need to fire off
565                  * the ARP timer.  If the interface is down, the
566                  * timer will get fired off when the open function
567                  * is called.
568                  */
569                 if (bond->arp_timer.function) {
570                         /* The timer's already set up, so fire it off */
571                         mod_timer(&bond->arp_timer, jiffies + 1);
572                 } else {
573                         /* Set up the timer. */
574                         init_timer(&bond->arp_timer);
575                         bond->arp_timer.expires = jiffies + 1;
576                         bond->arp_timer.data =
577                                 (unsigned long) bond->dev;
578                         if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) {
579                                 bond->arp_timer.function =
580                                         (void *)
581                                         &bond_activebackup_arp_mon;
582                         } else {
583                                 bond->arp_timer.function =
584                                         (void *)
585                                         &bond_loadbalance_arp_mon;
586                         }
587                         add_timer(&bond->arp_timer);
588                 }
589         }
590
591 out:
592         return ret;
593 }
594 static CLASS_DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR , bonding_show_arp_interval, bonding_store_arp_interval);
595
596 /*
597  * Show and set the arp targets.
598  */
599 static ssize_t bonding_show_arp_targets(struct class_device *cd, char *buf)
600 {
601         int i, res = 0;
602         struct bonding *bond = to_bond(cd);
603
604         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
605                 if (bond->params.arp_targets[i])
606                         res += sprintf(buf + res, "%u.%u.%u.%u ",
607                                NIPQUAD(bond->params.arp_targets[i]));
608         }
609         if (res)
610                 res--;  /* eat the leftover space */
611         res += sprintf(buf + res, "\n");
612         res++;
613         return res;
614 }
615
616 static ssize_t bonding_store_arp_targets(struct class_device *cd, const char *buf, size_t count)
617 {
618         u32 newtarget;
619         int i = 0, done = 0, ret = count;
620         struct bonding *bond = to_bond(cd);
621         u32 *targets;
622
623         targets = bond->params.arp_targets;
624         newtarget = in_aton(buf + 1);
625         /* look for adds */
626         if (buf[0] == '+') {
627                 if ((newtarget == 0) || (newtarget == INADDR_BROADCAST)) {
628                         printk(KERN_ERR DRV_NAME
629                                ": %s: invalid ARP target %u.%u.%u.%u specified for addition\n",
630                                bond->dev->name, NIPQUAD(newtarget));
631                         ret = -EINVAL;
632                         goto out;
633                 }
634                 /* look for an empty slot to put the target in, and check for dupes */
635                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
636                         if (targets[i] == newtarget) { /* duplicate */
637                                 printk(KERN_ERR DRV_NAME
638                                        ": %s: ARP target %u.%u.%u.%u is already present\n",
639                                        bond->dev->name, NIPQUAD(newtarget));
640                                 if (done)
641                                         targets[i] = 0;
642                                 ret = -EINVAL;
643                                 goto out;
644                         }
645                         if (targets[i] == 0 && !done) {
646                                 printk(KERN_INFO DRV_NAME
647                                        ": %s: adding ARP target %d.%d.%d.%d.\n",
648                                        bond->dev->name, NIPQUAD(newtarget));
649                                 done = 1;
650                                 targets[i] = newtarget;
651                         }
652                 }
653                 if (!done) {
654                         printk(KERN_ERR DRV_NAME
655                                ": %s: ARP target table is full!\n",
656                                bond->dev->name);
657                         ret = -EINVAL;
658                         goto out;
659                 }
660
661         }
662         else if (buf[0] == '-') {
663                 if ((newtarget == 0) || (newtarget == INADDR_BROADCAST)) {
664                         printk(KERN_ERR DRV_NAME
665                                ": %s: invalid ARP target %d.%d.%d.%d specified for removal\n",
666                                bond->dev->name, NIPQUAD(newtarget));
667                         ret = -EINVAL;
668                         goto out;
669                 }
670
671                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
672                         if (targets[i] == newtarget) {
673                                 printk(KERN_INFO DRV_NAME
674                                        ": %s: removing ARP target %d.%d.%d.%d.\n",
675                                        bond->dev->name, NIPQUAD(newtarget));
676                                 targets[i] = 0;
677                                 done = 1;
678                         }
679                 }
680                 if (!done) {
681                         printk(KERN_INFO DRV_NAME
682                                ": %s: unable to remove nonexistent ARP target %d.%d.%d.%d.\n",
683                                bond->dev->name, NIPQUAD(newtarget));
684                         ret = -EINVAL;
685                         goto out;
686                 }
687         }
688         else {
689                 printk(KERN_ERR DRV_NAME ": no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
690                         bond->dev->name);
691                 ret = -EPERM;
692                 goto out;
693         }
694
695 out:
696         return ret;
697 }
698 static CLASS_DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
699
700 /*
701  * Show and set the up and down delays.  These must be multiples of the
702  * MII monitoring value, and are stored internally as the multiplier.
703  * Thus, we must translate to MS for the real world.
704  */
705 static ssize_t bonding_show_downdelay(struct class_device *cd, char *buf)
706 {
707         struct bonding *bond = to_bond(cd);
708
709         return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon) + 1;
710 }
711
712 static ssize_t bonding_store_downdelay(struct class_device *cd, const char *buf, size_t count)
713 {
714         int new_value, ret = count;
715         struct bonding *bond = to_bond(cd);
716
717         if (!(bond->params.miimon)) {
718                 printk(KERN_ERR DRV_NAME
719                        ": %s: Unable to set down delay as MII monitoring is disabled\n",
720                        bond->dev->name);
721                 ret = -EPERM;
722                 goto out;
723         }
724
725         if (sscanf(buf, "%d", &new_value) != 1) {
726                 printk(KERN_ERR DRV_NAME
727                        ": %s: no down delay value specified.\n",
728                        bond->dev->name);
729                 ret = -EINVAL;
730                 goto out;
731         }
732         if (new_value < 0) {
733                 printk(KERN_ERR DRV_NAME
734                        ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
735                        bond->dev->name, new_value, 1, INT_MAX);
736                 ret = -EINVAL;
737                 goto out;
738         } else {
739                 if ((new_value % bond->params.miimon) != 0) {
740                         printk(KERN_WARNING DRV_NAME
741                                ": %s: Warning: down delay (%d) is not a multiple "
742                                "of miimon (%d), delay rounded to %d ms\n",
743                                bond->dev->name, new_value, bond->params.miimon,
744                                (new_value / bond->params.miimon) *
745                                bond->params.miimon);
746                 }
747                 bond->params.downdelay = new_value / bond->params.miimon;
748                 printk(KERN_INFO DRV_NAME ": %s: Setting down delay to %d.\n",
749                        bond->dev->name, bond->params.downdelay * bond->params.miimon);
750
751         }
752
753 out:
754         return ret;
755 }
756 static CLASS_DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR , bonding_show_downdelay, bonding_store_downdelay);
757
758 static ssize_t bonding_show_updelay(struct class_device *cd, char *buf)
759 {
760         struct bonding *bond = to_bond(cd);
761
762         return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon) + 1;
763
764 }
765
766 static ssize_t bonding_store_updelay(struct class_device *cd, const char *buf, size_t count)
767 {
768         int new_value, ret = count;
769         struct bonding *bond = to_bond(cd);
770
771         if (!(bond->params.miimon)) {
772                 printk(KERN_ERR DRV_NAME
773                        ": %s: Unable to set up delay as MII monitoring is disabled\n",
774                        bond->dev->name);
775                 ret = -EPERM;
776                 goto out;
777         }
778
779         if (sscanf(buf, "%d", &new_value) != 1) {
780                 printk(KERN_ERR DRV_NAME
781                        ": %s: no up delay value specified.\n",
782                        bond->dev->name);
783                 ret = -EINVAL;
784                 goto out;
785         }
786         if (new_value < 0) {
787                 printk(KERN_ERR DRV_NAME
788                        ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
789                        bond->dev->name, new_value, 1, INT_MAX);
790                 ret = -EINVAL;
791                 goto out;
792         } else {
793                 if ((new_value % bond->params.miimon) != 0) {
794                         printk(KERN_WARNING DRV_NAME
795                                ": %s: Warning: up delay (%d) is not a multiple "
796                                "of miimon (%d), updelay rounded to %d ms\n",
797                                bond->dev->name, new_value, bond->params.miimon,
798                                (new_value / bond->params.miimon) *
799                                bond->params.miimon);
800                 }
801                 bond->params.updelay = new_value / bond->params.miimon;
802                 printk(KERN_INFO DRV_NAME ": %s: Setting up delay to %d.\n",
803                        bond->dev->name, bond->params.updelay * bond->params.miimon);
804
805         }
806
807 out:
808         return ret;
809 }
810 static CLASS_DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR , bonding_show_updelay, bonding_store_updelay);
811
812 /*
813  * Show and set the LACP interval.  Interface must be down, and the mode
814  * must be set to 802.3ad mode.
815  */
816 static ssize_t bonding_show_lacp(struct class_device *cd, char *buf)
817 {
818         struct bonding *bond = to_bond(cd);
819
820         return sprintf(buf, "%s %d\n",
821                 bond_lacp_tbl[bond->params.lacp_fast].modename,
822                 bond->params.lacp_fast) + 1;
823 }
824
825 static ssize_t bonding_store_lacp(struct class_device *cd, const char *buf, size_t count)
826 {
827         int new_value, ret = count;
828         struct bonding *bond = to_bond(cd);
829
830         if (bond->dev->flags & IFF_UP) {
831                 printk(KERN_ERR DRV_NAME
832                        ": %s: Unable to update LACP rate because interface is up.\n",
833                        bond->dev->name);
834                 ret = -EPERM;
835                 goto out;
836         }
837
838         if (bond->params.mode != BOND_MODE_8023AD) {
839                 printk(KERN_ERR DRV_NAME
840                        ": %s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
841                        bond->dev->name);
842                 ret = -EPERM;
843                 goto out;
844         }
845
846         new_value = bond_parse_parm((char *)buf, bond_lacp_tbl);
847
848         if ((new_value == 1) || (new_value == 0)) {
849                 bond->params.lacp_fast = new_value;
850                 printk(KERN_INFO DRV_NAME
851                        ": %s: Setting LACP rate to %s (%d).\n",
852                        bond->dev->name, bond_lacp_tbl[new_value].modename, new_value);
853         } else {
854                 printk(KERN_ERR DRV_NAME
855                        ": %s: Ignoring invalid LACP rate value %.*s.\n",
856                         bond->dev->name, (int)strlen(buf) - 1, buf);
857                 ret = -EINVAL;
858         }
859 out:
860         return ret;
861 }
862 static CLASS_DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR, bonding_show_lacp, bonding_store_lacp);
863
864 /*
865  * Show and set the MII monitor interval.  There are two tricky bits
866  * here.  First, if MII monitoring is activated, then we must disable
867  * ARP monitoring.  Second, if the timer isn't running, we must
868  * start it.
869  */
870 static ssize_t bonding_show_miimon(struct class_device *cd, char *buf)
871 {
872         struct bonding *bond = to_bond(cd);
873
874         return sprintf(buf, "%d\n", bond->params.miimon) + 1;
875 }
876
877 static ssize_t bonding_store_miimon(struct class_device *cd, const char *buf, size_t count)
878 {
879         int new_value, ret = count;
880         struct bonding *bond = to_bond(cd);
881
882         if (sscanf(buf, "%d", &new_value) != 1) {
883                 printk(KERN_ERR DRV_NAME
884                        ": %s: no miimon value specified.\n",
885                        bond->dev->name);
886                 ret = -EINVAL;
887                 goto out;
888         }
889         if (new_value < 0) {
890                 printk(KERN_ERR DRV_NAME
891                        ": %s: Invalid miimon value %d not in range %d-%d; rejected.\n",
892                        bond->dev->name, new_value, 1, INT_MAX);
893                 ret = -EINVAL;
894                 goto out;
895         } else {
896                 printk(KERN_INFO DRV_NAME
897                        ": %s: Setting MII monitoring interval to %d.\n",
898                        bond->dev->name, new_value);
899                 bond->params.miimon = new_value;
900                 if(bond->params.updelay)
901                         printk(KERN_INFO DRV_NAME
902                               ": %s: Note: Updating updelay (to %d) "
903                               "since it is a multiple of the miimon value.\n",
904                               bond->dev->name,
905                               bond->params.updelay * bond->params.miimon);
906                 if(bond->params.downdelay)
907                         printk(KERN_INFO DRV_NAME
908                               ": %s: Note: Updating downdelay (to %d) "
909                               "since it is a multiple of the miimon value.\n",
910                               bond->dev->name,
911                               bond->params.downdelay * bond->params.miimon);
912                 if (bond->params.arp_interval) {
913                         printk(KERN_INFO DRV_NAME
914                                ": %s: MII monitoring cannot be used with "
915                                "ARP monitoring. Disabling ARP monitoring...\n",
916                                bond->dev->name);
917                         bond->params.arp_interval = 0;
918                         /* Kill ARP timer, else it brings bond's link down */
919                         if (bond->mii_timer.function) {
920                                 printk(KERN_INFO DRV_NAME
921                                 ": %s: Kill ARP timer, else it brings bond's link down...\n",
922                                bond->dev->name);
923                                 del_timer_sync(&bond->arp_timer);
924                         }
925                 }
926
927                 if (bond->dev->flags & IFF_UP) {
928                         /* If the interface is up, we may need to fire off
929                          * the MII timer. If the interface is down, the
930                          * timer will get fired off when the open function
931                          * is called.
932                          */
933                         if (bond->mii_timer.function) {
934                                 /* The timer's already set up, so fire it off */
935                                 mod_timer(&bond->mii_timer, jiffies + 1);
936                         } else {
937                                 /* Set up the timer. */
938                                 init_timer(&bond->mii_timer);
939                                 bond->mii_timer.expires = jiffies + 1;
940                                 bond->mii_timer.data =
941                                         (unsigned long) bond->dev;
942                                 bond->mii_timer.function =
943                                         (void *) &bond_mii_monitor;
944                                 add_timer(&bond->mii_timer);
945                         }
946                 }
947         }
948 out:
949         return ret;
950 }
951 static CLASS_DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR, bonding_show_miimon, bonding_store_miimon);
952
953 /*
954  * Show and set the primary slave.  The store function is much
955  * simpler than bonding_store_slaves function because it only needs to
956  * handle one interface name.
957  * The bond must be a mode that supports a primary for this be
958  * set.
959  */
960 static ssize_t bonding_show_primary(struct class_device *cd, char *buf)
961 {
962         int count = 0;
963         struct bonding *bond = to_bond(cd);
964
965         if (bond->primary_slave)
966                 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name) + 1;
967         else
968                 count = sprintf(buf, "\n") + 1;
969
970         return count;
971 }
972
973 static ssize_t bonding_store_primary(struct class_device *cd, const char *buf, size_t count)
974 {
975         int i;
976         struct slave *slave;
977         struct bonding *bond = to_bond(cd);
978
979         write_lock_bh(&bond->lock);
980         if (!USES_PRIMARY(bond->params.mode)) {
981                 printk(KERN_INFO DRV_NAME
982                        ": %s: Unable to set primary slave; %s is in mode %d\n",
983                        bond->dev->name, bond->dev->name, bond->params.mode);
984         } else {
985                 bond_for_each_slave(bond, slave, i) {
986                         if (strnicmp
987                             (slave->dev->name, buf,
988                              strlen(slave->dev->name)) == 0) {
989                                 printk(KERN_INFO DRV_NAME
990                                        ": %s: Setting %s as primary slave.\n",
991                                        bond->dev->name, slave->dev->name);
992                                 bond->primary_slave = slave;
993                                 bond_select_active_slave(bond);
994                                 goto out;
995                         }
996                 }
997
998                 /* if we got here, then we didn't match the name of any slave */
999
1000                 if (strlen(buf) == 0 || buf[0] == '\n') {
1001                         printk(KERN_INFO DRV_NAME
1002                                ": %s: Setting primary slave to None.\n",
1003                                bond->dev->name);
1004                         bond->primary_slave = NULL;
1005                                 bond_select_active_slave(bond);
1006                 } else {
1007                         printk(KERN_INFO DRV_NAME
1008                                ": %s: Unable to set %.*s as primary slave as it is not a slave.\n",
1009                                bond->dev->name, (int)strlen(buf) - 1, buf);
1010                 }
1011         }
1012 out:
1013         write_unlock_bh(&bond->lock);
1014         return count;
1015 }
1016 static CLASS_DEVICE_ATTR(primary, S_IRUGO | S_IWUSR, bonding_show_primary, bonding_store_primary);
1017
1018 /*
1019  * Show and set the use_carrier flag.
1020  */
1021 static ssize_t bonding_show_carrier(struct class_device *cd, char *buf)
1022 {
1023         struct bonding *bond = to_bond(cd);
1024
1025         return sprintf(buf, "%d\n", bond->params.use_carrier) + 1;
1026 }
1027
1028 static ssize_t bonding_store_carrier(struct class_device *cd, const char *buf, size_t count)
1029 {
1030         int new_value, ret = count;
1031         struct bonding *bond = to_bond(cd);
1032
1033
1034         if (sscanf(buf, "%d", &new_value) != 1) {
1035                 printk(KERN_ERR DRV_NAME
1036                        ": %s: no use_carrier value specified.\n",
1037                        bond->dev->name);
1038                 ret = -EINVAL;
1039                 goto out;
1040         }
1041         if ((new_value == 0) || (new_value == 1)) {
1042                 bond->params.use_carrier = new_value;
1043                 printk(KERN_INFO DRV_NAME ": %s: Setting use_carrier to %d.\n",
1044                        bond->dev->name, new_value);
1045         } else {
1046                 printk(KERN_INFO DRV_NAME
1047                        ": %s: Ignoring invalid use_carrier value %d.\n",
1048                        bond->dev->name, new_value);
1049         }
1050 out:
1051         return count;
1052 }
1053 static CLASS_DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR, bonding_show_carrier, bonding_store_carrier);
1054
1055
1056 /*
1057  * Show and set currently active_slave.
1058  */
1059 static ssize_t bonding_show_active_slave(struct class_device *cd, char *buf)
1060 {
1061         struct slave *curr;
1062         struct bonding *bond = to_bond(cd);
1063         int count;
1064
1065
1066         read_lock(&bond->curr_slave_lock);
1067         curr = bond->curr_active_slave;
1068         read_unlock(&bond->curr_slave_lock);
1069
1070         if (USES_PRIMARY(bond->params.mode) && curr)
1071                 count = sprintf(buf, "%s\n", curr->dev->name) + 1;
1072         else
1073                 count = sprintf(buf, "\n") + 1;
1074         return count;
1075 }
1076
1077 static ssize_t bonding_store_active_slave(struct class_device *cd, const char *buf, size_t count)
1078 {
1079         int i;
1080         struct slave *slave;
1081         struct slave *old_active = NULL;
1082         struct slave *new_active = NULL;
1083         struct bonding *bond = to_bond(cd);
1084
1085         write_lock_bh(&bond->lock);
1086         if (!USES_PRIMARY(bond->params.mode)) {
1087                 printk(KERN_INFO DRV_NAME
1088                        ": %s: Unable to change active slave; %s is in mode %d\n",
1089                        bond->dev->name, bond->dev->name, bond->params.mode);
1090         } else {
1091                 bond_for_each_slave(bond, slave, i) {
1092                         if (strnicmp
1093                             (slave->dev->name, buf,
1094                              strlen(slave->dev->name)) == 0) {
1095                                 old_active = bond->curr_active_slave;
1096                                 new_active = slave;
1097                                 if (new_active && (new_active == old_active)) {
1098                                         /* do nothing */
1099                                         printk(KERN_INFO DRV_NAME
1100                                                ": %s: %s is already the current active slave.\n",
1101                                                bond->dev->name, slave->dev->name);
1102                                         goto out;
1103                                 }
1104                                 else {
1105                                         if ((new_active) &&
1106                                             (old_active) &&
1107                                             (new_active->link == BOND_LINK_UP) &&
1108                                             IS_UP(new_active->dev)) {
1109                                                 printk(KERN_INFO DRV_NAME
1110                                                       ": %s: Setting %s as active slave.\n",
1111                                                       bond->dev->name, slave->dev->name);
1112                                                 bond_change_active_slave(bond, new_active);
1113                                         }
1114                                         else {
1115                                                 printk(KERN_INFO DRV_NAME
1116                                                       ": %s: Could not set %s as active slave; "
1117                                                       "either %s is down or the link is down.\n",
1118                                                       bond->dev->name, slave->dev->name,
1119                                                       slave->dev->name);
1120                                         }
1121                                         goto out;
1122                                 }
1123                         }
1124                 }
1125
1126                 /* if we got here, then we didn't match the name of any slave */
1127
1128                 if (strlen(buf) == 0 || buf[0] == '\n') {
1129                         printk(KERN_INFO DRV_NAME
1130                                ": %s: Setting active slave to None.\n",
1131                                bond->dev->name);
1132                         bond->primary_slave = NULL;
1133                                 bond_select_active_slave(bond);
1134                 } else {
1135                         printk(KERN_INFO DRV_NAME
1136                                ": %s: Unable to set %.*s as active slave as it is not a slave.\n",
1137                                bond->dev->name, (int)strlen(buf) - 1, buf);
1138                 }
1139         }
1140 out:
1141         write_unlock_bh(&bond->lock);
1142         return count;
1143
1144 }
1145 static CLASS_DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR, bonding_show_active_slave, bonding_store_active_slave);
1146
1147
1148 /*
1149  * Show link status of the bond interface.
1150  */
1151 static ssize_t bonding_show_mii_status(struct class_device *cd, char *buf)
1152 {
1153         struct slave *curr;
1154         struct bonding *bond = to_bond(cd);
1155
1156         read_lock(&bond->curr_slave_lock);
1157         curr = bond->curr_active_slave;
1158         read_unlock(&bond->curr_slave_lock);
1159
1160         return sprintf(buf, "%s\n", (curr) ? "up" : "down") + 1;
1161 }
1162 static CLASS_DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1163
1164
1165 /*
1166  * Show current 802.3ad aggregator ID.
1167  */
1168 static ssize_t bonding_show_ad_aggregator(struct class_device *cd, char *buf)
1169 {
1170         int count = 0;
1171         struct bonding *bond = to_bond(cd);
1172
1173         if (bond->params.mode == BOND_MODE_8023AD) {
1174                 struct ad_info ad_info;
1175                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.aggregator_id) + 1;
1176         }
1177         else
1178                 count = sprintf(buf, "\n") + 1;
1179
1180         return count;
1181 }
1182 static CLASS_DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1183
1184
1185 /*
1186  * Show number of active 802.3ad ports.
1187  */
1188 static ssize_t bonding_show_ad_num_ports(struct class_device *cd, char *buf)
1189 {
1190         int count = 0;
1191         struct bonding *bond = to_bond(cd);
1192
1193         if (bond->params.mode == BOND_MODE_8023AD) {
1194                 struct ad_info ad_info;
1195                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0: ad_info.ports) + 1;
1196         }
1197         else
1198                 count = sprintf(buf, "\n") + 1;
1199
1200         return count;
1201 }
1202 static CLASS_DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1203
1204
1205 /*
1206  * Show current 802.3ad actor key.
1207  */
1208 static ssize_t bonding_show_ad_actor_key(struct class_device *cd, char *buf)
1209 {
1210         int count = 0;
1211         struct bonding *bond = to_bond(cd);
1212
1213         if (bond->params.mode == BOND_MODE_8023AD) {
1214                 struct ad_info ad_info;
1215                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.actor_key) + 1;
1216         }
1217         else
1218                 count = sprintf(buf, "\n") + 1;
1219
1220         return count;
1221 }
1222 static CLASS_DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1223
1224
1225 /*
1226  * Show current 802.3ad partner key.
1227  */
1228 static ssize_t bonding_show_ad_partner_key(struct class_device *cd, char *buf)
1229 {
1230         int count = 0;
1231         struct bonding *bond = to_bond(cd);
1232
1233         if (bond->params.mode == BOND_MODE_8023AD) {
1234                 struct ad_info ad_info;
1235                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.partner_key) + 1;
1236         }
1237         else
1238                 count = sprintf(buf, "\n") + 1;
1239
1240         return count;
1241 }
1242 static CLASS_DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1243
1244
1245 /*
1246  * Show current 802.3ad partner mac.
1247  */
1248 static ssize_t bonding_show_ad_partner_mac(struct class_device *cd, char *buf)
1249 {
1250         int count = 0;
1251         struct bonding *bond = to_bond(cd);
1252
1253         if (bond->params.mode == BOND_MODE_8023AD) {
1254                 struct ad_info ad_info;
1255                 if (!bond_3ad_get_active_agg_info(bond, &ad_info)) {
1256                         count = sprintf(buf,"%02x:%02x:%02x:%02x:%02x:%02x\n",
1257                                        ad_info.partner_system[0],
1258                                        ad_info.partner_system[1],
1259                                        ad_info.partner_system[2],
1260                                        ad_info.partner_system[3],
1261                                        ad_info.partner_system[4],
1262                                        ad_info.partner_system[5]) + 1;
1263                 }
1264         }
1265         else
1266                 count = sprintf(buf, "\n") + 1;
1267
1268         return count;
1269 }
1270 static CLASS_DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1271
1272
1273
1274 static struct attribute *per_bond_attrs[] = {
1275         &class_device_attr_slaves.attr,
1276         &class_device_attr_mode.attr,
1277         &class_device_attr_arp_interval.attr,
1278         &class_device_attr_arp_ip_target.attr,
1279         &class_device_attr_downdelay.attr,
1280         &class_device_attr_updelay.attr,
1281         &class_device_attr_lacp_rate.attr,
1282         &class_device_attr_xmit_hash_policy.attr,
1283         &class_device_attr_miimon.attr,
1284         &class_device_attr_primary.attr,
1285         &class_device_attr_use_carrier.attr,
1286         &class_device_attr_active_slave.attr,
1287         &class_device_attr_mii_status.attr,
1288         &class_device_attr_ad_aggregator.attr,
1289         &class_device_attr_ad_num_ports.attr,
1290         &class_device_attr_ad_actor_key.attr,
1291         &class_device_attr_ad_partner_key.attr,
1292         &class_device_attr_ad_partner_mac.attr,
1293         NULL,
1294 };
1295
1296 static struct attribute_group bonding_group = {
1297         .name = "bonding",
1298         .attrs = per_bond_attrs,
1299 };
1300
1301 /*
1302  * Initialize sysfs.  This sets up the bonding_masters file in
1303  * /sys/class/net.
1304  */
1305 int bond_create_sysfs(void)
1306 {
1307         int ret = 0;
1308         struct bonding *firstbond;
1309
1310         init_rwsem(&bonding_rwsem);
1311
1312         /* get the netdev class pointer */
1313         firstbond = container_of(bond_dev_list.next, struct bonding, bond_list);
1314         if (!firstbond)
1315                 return -ENODEV;
1316
1317         netdev_class = firstbond->dev->class_dev.class;
1318         if (!netdev_class)
1319                 return -ENODEV;
1320
1321         ret = class_create_file(netdev_class, &class_attr_bonding_masters);
1322
1323         return ret;
1324
1325 }
1326
1327 /*
1328  * Remove /sys/class/net/bonding_masters.
1329  */
1330 void bond_destroy_sysfs(void)
1331 {
1332         if (netdev_class)
1333                 class_remove_file(netdev_class, &class_attr_bonding_masters);
1334 }
1335
1336 /*
1337  * Initialize sysfs for each bond.  This sets up and registers
1338  * the 'bondctl' directory for each individual bond under /sys/class/net.
1339  */
1340 int bond_create_sysfs_entry(struct bonding *bond)
1341 {
1342         struct net_device *dev = bond->dev;
1343         int err;
1344
1345         err = sysfs_create_group(&(dev->class_dev.kobj), &bonding_group);
1346         if (err) {
1347                 printk(KERN_EMERG "eek! didn't create group!\n");
1348         }
1349
1350         if (expected_refcount < 1)
1351                 expected_refcount = atomic_read(&bond->dev->class_dev.kobj.kref.refcount);
1352
1353         return err;
1354 }
1355 /*
1356  * Remove sysfs entries for each bond.
1357  */
1358 void bond_destroy_sysfs_entry(struct bonding *bond)
1359 {
1360         struct net_device *dev = bond->dev;
1361
1362         sysfs_remove_group(&(dev->class_dev.kobj), &bonding_group);
1363 }
1364