Merge master.kernel.org:/pub/scm/linux/kernel/git/davej/agpgart
[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                 bond->params.mode = new_value;
428                 bond_set_mode_ops(bond, bond->params.mode);
429                 printk(KERN_INFO DRV_NAME ": %s: setting mode to %s (%d).\n",
430                         bond->dev->name, bond_mode_tbl[new_value].modename, new_value);
431         }
432 out:
433         return ret;
434 }
435 static CLASS_DEVICE_ATTR(mode, S_IRUGO | S_IWUSR, bonding_show_mode, bonding_store_mode);
436
437 /*
438  * Show and set the bonding transmit hash method.  The bond interface must be down to
439  * change the xmit hash policy.
440  */
441 static ssize_t bonding_show_xmit_hash(struct class_device *cd, char *buf)
442 {
443         int count;
444         struct bonding *bond = to_bond(cd);
445
446         if ((bond->params.mode != BOND_MODE_XOR) &&
447             (bond->params.mode != BOND_MODE_8023AD)) {
448                 // Not Applicable
449                 count = sprintf(buf, "NA\n") + 1;
450         } else {
451                 count = sprintf(buf, "%s %d\n",
452                         xmit_hashtype_tbl[bond->params.xmit_policy].modename,
453                         bond->params.xmit_policy) + 1;
454         }
455
456         return count;
457 }
458
459 static ssize_t bonding_store_xmit_hash(struct class_device *cd, const char *buf, size_t count)
460 {
461         int new_value, ret = count;
462         struct bonding *bond = to_bond(cd);
463
464         if (bond->dev->flags & IFF_UP) {
465                 printk(KERN_ERR DRV_NAME
466                        "%s: Interface is up. Unable to update xmit policy.\n",
467                        bond->dev->name);
468                 ret = -EPERM;
469                 goto out;
470         }
471
472         if ((bond->params.mode != BOND_MODE_XOR) &&
473             (bond->params.mode != BOND_MODE_8023AD)) {
474                 printk(KERN_ERR DRV_NAME
475                        "%s: Transmit hash policy is irrelevant in this mode.\n",
476                        bond->dev->name);
477                 ret = -EPERM;
478                 goto out;
479         }
480
481         new_value = bond_parse_parm((char *)buf, xmit_hashtype_tbl);
482         if (new_value < 0)  {
483                 printk(KERN_ERR DRV_NAME
484                        ": %s: Ignoring invalid xmit hash policy value %.*s.\n",
485                        bond->dev->name,
486                        (int)strlen(buf) - 1, buf);
487                 ret = -EINVAL;
488                 goto out;
489         } else {
490                 bond->params.xmit_policy = new_value;
491                 bond_set_mode_ops(bond, bond->params.mode);
492                 printk(KERN_INFO DRV_NAME ": %s: setting xmit hash policy to %s (%d).\n",
493                         bond->dev->name, xmit_hashtype_tbl[new_value].modename, new_value);
494         }
495 out:
496         return ret;
497 }
498 static CLASS_DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR, bonding_show_xmit_hash, bonding_store_xmit_hash);
499
500 /*
501  * Show and set the arp timer interval.  There are two tricky bits
502  * here.  First, if ARP monitoring is activated, then we must disable
503  * MII monitoring.  Second, if the ARP timer isn't running, we must
504  * start it.
505  */
506 static ssize_t bonding_show_arp_interval(struct class_device *cd, char *buf)
507 {
508         struct bonding *bond = to_bond(cd);
509
510         return sprintf(buf, "%d\n", bond->params.arp_interval) + 1;
511 }
512
513 static ssize_t bonding_store_arp_interval(struct class_device *cd, const char *buf, size_t count)
514 {
515         int new_value, ret = count;
516         struct bonding *bond = to_bond(cd);
517
518         if (sscanf(buf, "%d", &new_value) != 1) {
519                 printk(KERN_ERR DRV_NAME
520                        ": %s: no arp_interval value specified.\n",
521                        bond->dev->name);
522                 ret = -EINVAL;
523                 goto out;
524         }
525         if (new_value < 0) {
526                 printk(KERN_ERR DRV_NAME
527                        ": %s: Invalid arp_interval value %d not in range 1-%d; rejected.\n",
528                        bond->dev->name, new_value, INT_MAX);
529                 ret = -EINVAL;
530                 goto out;
531         }
532
533         printk(KERN_INFO DRV_NAME
534                ": %s: Setting ARP monitoring interval to %d.\n",
535                bond->dev->name, new_value);
536         bond->params.arp_interval = new_value;
537         if (bond->params.miimon) {
538                 printk(KERN_INFO DRV_NAME
539                        ": %s: ARP monitoring cannot be used with MII monitoring. "
540                        "%s Disabling MII monitoring.\n",
541                        bond->dev->name, bond->dev->name);
542                 bond->params.miimon = 0;
543                 /* Kill MII timer, else it brings bond's link down */
544                 if (bond->arp_timer.function) {
545                         printk(KERN_INFO DRV_NAME
546                         ": %s: Kill MII timer, else it brings bond's link down...\n",
547                        bond->dev->name);
548                         del_timer_sync(&bond->mii_timer);
549                 }
550         }
551         if (!bond->params.arp_targets[0]) {
552                 printk(KERN_INFO DRV_NAME
553                        ": %s: ARP monitoring has been set up, "
554                        "but no ARP targets have been specified.\n",
555                        bond->dev->name);
556         }
557         if (bond->dev->flags & IFF_UP) {
558                 /* If the interface is up, we may need to fire off
559                  * the ARP timer.  If the interface is down, the
560                  * timer will get fired off when the open function
561                  * is called.
562                  */
563                 if (bond->arp_timer.function) {
564                         /* The timer's already set up, so fire it off */
565                         mod_timer(&bond->arp_timer, jiffies + 1);
566                 } else {
567                         /* Set up the timer. */
568                         init_timer(&bond->arp_timer);
569                         bond->arp_timer.expires = jiffies + 1;
570                         bond->arp_timer.data =
571                                 (unsigned long) bond->dev;
572                         if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) {
573                                 bond->arp_timer.function =
574                                         (void *)
575                                         &bond_activebackup_arp_mon;
576                         } else {
577                                 bond->arp_timer.function =
578                                         (void *)
579                                         &bond_loadbalance_arp_mon;
580                         }
581                         add_timer(&bond->arp_timer);
582                 }
583         }
584
585 out:
586         return ret;
587 }
588 static CLASS_DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR , bonding_show_arp_interval, bonding_store_arp_interval);
589
590 /*
591  * Show and set the arp targets.
592  */
593 static ssize_t bonding_show_arp_targets(struct class_device *cd, char *buf)
594 {
595         int i, res = 0;
596         struct bonding *bond = to_bond(cd);
597
598         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
599                 if (bond->params.arp_targets[i])
600                         res += sprintf(buf + res, "%u.%u.%u.%u ",
601                                NIPQUAD(bond->params.arp_targets[i]));
602         }
603         if (res)
604                 res--;  /* eat the leftover space */
605         res += sprintf(buf + res, "\n");
606         res++;
607         return res;
608 }
609
610 static ssize_t bonding_store_arp_targets(struct class_device *cd, const char *buf, size_t count)
611 {
612         u32 newtarget;
613         int i = 0, done = 0, ret = count;
614         struct bonding *bond = to_bond(cd);
615         u32 *targets;
616
617         targets = bond->params.arp_targets;
618         newtarget = in_aton(buf + 1);
619         /* look for adds */
620         if (buf[0] == '+') {
621                 if ((newtarget == 0) || (newtarget == INADDR_BROADCAST)) {
622                         printk(KERN_ERR DRV_NAME
623                                ": %s: invalid ARP target %u.%u.%u.%u specified for addition\n",
624                                bond->dev->name, NIPQUAD(newtarget));
625                         ret = -EINVAL;
626                         goto out;
627                 }
628                 /* look for an empty slot to put the target in, and check for dupes */
629                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
630                         if (targets[i] == newtarget) { /* duplicate */
631                                 printk(KERN_ERR DRV_NAME
632                                        ": %s: ARP target %u.%u.%u.%u is already present\n",
633                                        bond->dev->name, NIPQUAD(newtarget));
634                                 if (done)
635                                         targets[i] = 0;
636                                 ret = -EINVAL;
637                                 goto out;
638                         }
639                         if (targets[i] == 0 && !done) {
640                                 printk(KERN_INFO DRV_NAME
641                                        ": %s: adding ARP target %d.%d.%d.%d.\n",
642                                        bond->dev->name, NIPQUAD(newtarget));
643                                 done = 1;
644                                 targets[i] = newtarget;
645                         }
646                 }
647                 if (!done) {
648                         printk(KERN_ERR DRV_NAME
649                                ": %s: ARP target table is full!\n",
650                                bond->dev->name);
651                         ret = -EINVAL;
652                         goto out;
653                 }
654
655         }
656         else if (buf[0] == '-') {
657                 if ((newtarget == 0) || (newtarget == INADDR_BROADCAST)) {
658                         printk(KERN_ERR DRV_NAME
659                                ": %s: invalid ARP target %d.%d.%d.%d specified for removal\n",
660                                bond->dev->name, NIPQUAD(newtarget));
661                         ret = -EINVAL;
662                         goto out;
663                 }
664
665                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
666                         if (targets[i] == newtarget) {
667                                 printk(KERN_INFO DRV_NAME
668                                        ": %s: removing ARP target %d.%d.%d.%d.\n",
669                                        bond->dev->name, NIPQUAD(newtarget));
670                                 targets[i] = 0;
671                                 done = 1;
672                         }
673                 }
674                 if (!done) {
675                         printk(KERN_INFO DRV_NAME
676                                ": %s: unable to remove nonexistent ARP target %d.%d.%d.%d.\n",
677                                bond->dev->name, NIPQUAD(newtarget));
678                         ret = -EINVAL;
679                         goto out;
680                 }
681         }
682         else {
683                 printk(KERN_ERR DRV_NAME ": no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
684                         bond->dev->name);
685                 ret = -EPERM;
686                 goto out;
687         }
688
689 out:
690         return ret;
691 }
692 static CLASS_DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
693
694 /*
695  * Show and set the up and down delays.  These must be multiples of the
696  * MII monitoring value, and are stored internally as the multiplier.
697  * Thus, we must translate to MS for the real world.
698  */
699 static ssize_t bonding_show_downdelay(struct class_device *cd, char *buf)
700 {
701         struct bonding *bond = to_bond(cd);
702
703         return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon) + 1;
704 }
705
706 static ssize_t bonding_store_downdelay(struct class_device *cd, const char *buf, size_t count)
707 {
708         int new_value, ret = count;
709         struct bonding *bond = to_bond(cd);
710
711         if (!(bond->params.miimon)) {
712                 printk(KERN_ERR DRV_NAME
713                        ": %s: Unable to set down delay as MII monitoring is disabled\n",
714                        bond->dev->name);
715                 ret = -EPERM;
716                 goto out;
717         }
718
719         if (sscanf(buf, "%d", &new_value) != 1) {
720                 printk(KERN_ERR DRV_NAME
721                        ": %s: no down delay value specified.\n",
722                        bond->dev->name);
723                 ret = -EINVAL;
724                 goto out;
725         }
726         if (new_value < 0) {
727                 printk(KERN_ERR DRV_NAME
728                        ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
729                        bond->dev->name, new_value, 1, INT_MAX);
730                 ret = -EINVAL;
731                 goto out;
732         } else {
733                 if ((new_value % bond->params.miimon) != 0) {
734                         printk(KERN_WARNING DRV_NAME
735                                ": %s: Warning: down delay (%d) is not a multiple "
736                                "of miimon (%d), delay rounded to %d ms\n",
737                                bond->dev->name, new_value, bond->params.miimon,
738                                (new_value / bond->params.miimon) *
739                                bond->params.miimon);
740                 }
741                 bond->params.downdelay = new_value / bond->params.miimon;
742                 printk(KERN_INFO DRV_NAME ": %s: Setting down delay to %d.\n",
743                        bond->dev->name, bond->params.downdelay * bond->params.miimon);
744
745         }
746
747 out:
748         return ret;
749 }
750 static CLASS_DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR , bonding_show_downdelay, bonding_store_downdelay);
751
752 static ssize_t bonding_show_updelay(struct class_device *cd, char *buf)
753 {
754         struct bonding *bond = to_bond(cd);
755
756         return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon) + 1;
757
758 }
759
760 static ssize_t bonding_store_updelay(struct class_device *cd, const char *buf, size_t count)
761 {
762         int new_value, ret = count;
763         struct bonding *bond = to_bond(cd);
764
765         if (!(bond->params.miimon)) {
766                 printk(KERN_ERR DRV_NAME
767                        ": %s: Unable to set up delay as MII monitoring is disabled\n",
768                        bond->dev->name);
769                 ret = -EPERM;
770                 goto out;
771         }
772
773         if (sscanf(buf, "%d", &new_value) != 1) {
774                 printk(KERN_ERR DRV_NAME
775                        ": %s: no up delay value specified.\n",
776                        bond->dev->name);
777                 ret = -EINVAL;
778                 goto out;
779         }
780         if (new_value < 0) {
781                 printk(KERN_ERR DRV_NAME
782                        ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
783                        bond->dev->name, new_value, 1, INT_MAX);
784                 ret = -EINVAL;
785                 goto out;
786         } else {
787                 if ((new_value % bond->params.miimon) != 0) {
788                         printk(KERN_WARNING DRV_NAME
789                                ": %s: Warning: up delay (%d) is not a multiple "
790                                "of miimon (%d), updelay rounded to %d ms\n",
791                                bond->dev->name, new_value, bond->params.miimon,
792                                (new_value / bond->params.miimon) *
793                                bond->params.miimon);
794                 }
795                 bond->params.updelay = new_value / bond->params.miimon;
796                 printk(KERN_INFO DRV_NAME ": %s: Setting up delay to %d.\n",
797                        bond->dev->name, bond->params.updelay * bond->params.miimon);
798
799         }
800
801 out:
802         return ret;
803 }
804 static CLASS_DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR , bonding_show_updelay, bonding_store_updelay);
805
806 /*
807  * Show and set the LACP interval.  Interface must be down, and the mode
808  * must be set to 802.3ad mode.
809  */
810 static ssize_t bonding_show_lacp(struct class_device *cd, char *buf)
811 {
812         struct bonding *bond = to_bond(cd);
813
814         return sprintf(buf, "%s %d\n",
815                 bond_lacp_tbl[bond->params.lacp_fast].modename,
816                 bond->params.lacp_fast) + 1;
817 }
818
819 static ssize_t bonding_store_lacp(struct class_device *cd, const char *buf, size_t count)
820 {
821         int new_value, ret = count;
822         struct bonding *bond = to_bond(cd);
823
824         if (bond->dev->flags & IFF_UP) {
825                 printk(KERN_ERR DRV_NAME
826                        ": %s: Unable to update LACP rate because interface is up.\n",
827                        bond->dev->name);
828                 ret = -EPERM;
829                 goto out;
830         }
831
832         if (bond->params.mode != BOND_MODE_8023AD) {
833                 printk(KERN_ERR DRV_NAME
834                        ": %s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
835                        bond->dev->name);
836                 ret = -EPERM;
837                 goto out;
838         }
839
840         new_value = bond_parse_parm((char *)buf, bond_lacp_tbl);
841
842         if ((new_value == 1) || (new_value == 0)) {
843                 bond->params.lacp_fast = new_value;
844                 printk(KERN_INFO DRV_NAME
845                        ": %s: Setting LACP rate to %s (%d).\n",
846                        bond->dev->name, bond_lacp_tbl[new_value].modename, new_value);
847         } else {
848                 printk(KERN_ERR DRV_NAME
849                        ": %s: Ignoring invalid LACP rate value %.*s.\n",
850                         bond->dev->name, (int)strlen(buf) - 1, buf);
851                 ret = -EINVAL;
852         }
853 out:
854         return ret;
855 }
856 static CLASS_DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR, bonding_show_lacp, bonding_store_lacp);
857
858 /*
859  * Show and set the MII monitor interval.  There are two tricky bits
860  * here.  First, if MII monitoring is activated, then we must disable
861  * ARP monitoring.  Second, if the timer isn't running, we must
862  * start it.
863  */
864 static ssize_t bonding_show_miimon(struct class_device *cd, char *buf)
865 {
866         struct bonding *bond = to_bond(cd);
867
868         return sprintf(buf, "%d\n", bond->params.miimon) + 1;
869 }
870
871 static ssize_t bonding_store_miimon(struct class_device *cd, const char *buf, size_t count)
872 {
873         int new_value, ret = count;
874         struct bonding *bond = to_bond(cd);
875
876         if (sscanf(buf, "%d", &new_value) != 1) {
877                 printk(KERN_ERR DRV_NAME
878                        ": %s: no miimon value specified.\n",
879                        bond->dev->name);
880                 ret = -EINVAL;
881                 goto out;
882         }
883         if (new_value < 0) {
884                 printk(KERN_ERR DRV_NAME
885                        ": %s: Invalid miimon value %d not in range %d-%d; rejected.\n",
886                        bond->dev->name, new_value, 1, INT_MAX);
887                 ret = -EINVAL;
888                 goto out;
889         } else {
890                 printk(KERN_INFO DRV_NAME
891                        ": %s: Setting MII monitoring interval to %d.\n",
892                        bond->dev->name, new_value);
893                 bond->params.miimon = new_value;
894                 if(bond->params.updelay)
895                         printk(KERN_INFO DRV_NAME
896                               ": %s: Note: Updating updelay (to %d) "
897                               "since it is a multiple of the miimon value.\n",
898                               bond->dev->name,
899                               bond->params.updelay * bond->params.miimon);
900                 if(bond->params.downdelay)
901                         printk(KERN_INFO DRV_NAME
902                               ": %s: Note: Updating downdelay (to %d) "
903                               "since it is a multiple of the miimon value.\n",
904                               bond->dev->name,
905                               bond->params.downdelay * bond->params.miimon);
906                 if (bond->params.arp_interval) {
907                         printk(KERN_INFO DRV_NAME
908                                ": %s: MII monitoring cannot be used with "
909                                "ARP monitoring. Disabling ARP monitoring...\n",
910                                bond->dev->name);
911                         bond->params.arp_interval = 0;
912                         /* Kill ARP timer, else it brings bond's link down */
913                         if (bond->mii_timer.function) {
914                                 printk(KERN_INFO DRV_NAME
915                                 ": %s: Kill ARP timer, else it brings bond's link down...\n",
916                                bond->dev->name);
917                                 del_timer_sync(&bond->arp_timer);
918                         }
919                 }
920
921                 if (bond->dev->flags & IFF_UP) {
922                         /* If the interface is up, we may need to fire off
923                          * the MII timer. If the interface is down, the
924                          * timer will get fired off when the open function
925                          * is called.
926                          */
927                         if (bond->mii_timer.function) {
928                                 /* The timer's already set up, so fire it off */
929                                 mod_timer(&bond->mii_timer, jiffies + 1);
930                         } else {
931                                 /* Set up the timer. */
932                                 init_timer(&bond->mii_timer);
933                                 bond->mii_timer.expires = jiffies + 1;
934                                 bond->mii_timer.data =
935                                         (unsigned long) bond->dev;
936                                 bond->mii_timer.function =
937                                         (void *) &bond_mii_monitor;
938                                 add_timer(&bond->mii_timer);
939                         }
940                 }
941         }
942 out:
943         return ret;
944 }
945 static CLASS_DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR, bonding_show_miimon, bonding_store_miimon);
946
947 /*
948  * Show and set the primary slave.  The store function is much
949  * simpler than bonding_store_slaves function because it only needs to
950  * handle one interface name.
951  * The bond must be a mode that supports a primary for this be
952  * set.
953  */
954 static ssize_t bonding_show_primary(struct class_device *cd, char *buf)
955 {
956         int count = 0;
957         struct bonding *bond = to_bond(cd);
958
959         if (bond->primary_slave)
960                 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name) + 1;
961         else
962                 count = sprintf(buf, "\n") + 1;
963
964         return count;
965 }
966
967 static ssize_t bonding_store_primary(struct class_device *cd, const char *buf, size_t count)
968 {
969         int i;
970         struct slave *slave;
971         struct bonding *bond = to_bond(cd);
972
973         write_lock_bh(&bond->lock);
974         if (!USES_PRIMARY(bond->params.mode)) {
975                 printk(KERN_INFO DRV_NAME
976                        ": %s: Unable to set primary slave; %s is in mode %d\n",
977                        bond->dev->name, bond->dev->name, bond->params.mode);
978         } else {
979                 bond_for_each_slave(bond, slave, i) {
980                         if (strnicmp
981                             (slave->dev->name, buf,
982                              strlen(slave->dev->name)) == 0) {
983                                 printk(KERN_INFO DRV_NAME
984                                        ": %s: Setting %s as primary slave.\n",
985                                        bond->dev->name, slave->dev->name);
986                                 bond->primary_slave = slave;
987                                 bond_select_active_slave(bond);
988                                 goto out;
989                         }
990                 }
991
992                 /* if we got here, then we didn't match the name of any slave */
993
994                 if (strlen(buf) == 0 || buf[0] == '\n') {
995                         printk(KERN_INFO DRV_NAME
996                                ": %s: Setting primary slave to None.\n",
997                                bond->dev->name);
998                         bond->primary_slave = NULL;
999                                 bond_select_active_slave(bond);
1000                 } else {
1001                         printk(KERN_INFO DRV_NAME
1002                                ": %s: Unable to set %.*s as primary slave as it is not a slave.\n",
1003                                bond->dev->name, (int)strlen(buf) - 1, buf);
1004                 }
1005         }
1006 out:
1007         write_unlock_bh(&bond->lock);
1008         return count;
1009 }
1010 static CLASS_DEVICE_ATTR(primary, S_IRUGO | S_IWUSR, bonding_show_primary, bonding_store_primary);
1011
1012 /*
1013  * Show and set the use_carrier flag.
1014  */
1015 static ssize_t bonding_show_carrier(struct class_device *cd, char *buf)
1016 {
1017         struct bonding *bond = to_bond(cd);
1018
1019         return sprintf(buf, "%d\n", bond->params.use_carrier) + 1;
1020 }
1021
1022 static ssize_t bonding_store_carrier(struct class_device *cd, const char *buf, size_t count)
1023 {
1024         int new_value, ret = count;
1025         struct bonding *bond = to_bond(cd);
1026
1027
1028         if (sscanf(buf, "%d", &new_value) != 1) {
1029                 printk(KERN_ERR DRV_NAME
1030                        ": %s: no use_carrier value specified.\n",
1031                        bond->dev->name);
1032                 ret = -EINVAL;
1033                 goto out;
1034         }
1035         if ((new_value == 0) || (new_value == 1)) {
1036                 bond->params.use_carrier = new_value;
1037                 printk(KERN_INFO DRV_NAME ": %s: Setting use_carrier to %d.\n",
1038                        bond->dev->name, new_value);
1039         } else {
1040                 printk(KERN_INFO DRV_NAME
1041                        ": %s: Ignoring invalid use_carrier value %d.\n",
1042                        bond->dev->name, new_value);
1043         }
1044 out:
1045         return count;
1046 }
1047 static CLASS_DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR, bonding_show_carrier, bonding_store_carrier);
1048
1049
1050 /*
1051  * Show and set currently active_slave.
1052  */
1053 static ssize_t bonding_show_active_slave(struct class_device *cd, char *buf)
1054 {
1055         struct slave *curr;
1056         struct bonding *bond = to_bond(cd);
1057         int count;
1058
1059
1060         read_lock(&bond->curr_slave_lock);
1061         curr = bond->curr_active_slave;
1062         read_unlock(&bond->curr_slave_lock);
1063
1064         if (USES_PRIMARY(bond->params.mode) && curr)
1065                 count = sprintf(buf, "%s\n", curr->dev->name) + 1;
1066         else
1067                 count = sprintf(buf, "\n") + 1;
1068         return count;
1069 }
1070
1071 static ssize_t bonding_store_active_slave(struct class_device *cd, const char *buf, size_t count)
1072 {
1073         int i;
1074         struct slave *slave;
1075         struct slave *old_active = NULL;
1076         struct slave *new_active = NULL;
1077         struct bonding *bond = to_bond(cd);
1078
1079         write_lock_bh(&bond->lock);
1080         if (!USES_PRIMARY(bond->params.mode)) {
1081                 printk(KERN_INFO DRV_NAME
1082                        ": %s: Unable to change active slave; %s is in mode %d\n",
1083                        bond->dev->name, bond->dev->name, bond->params.mode);
1084         } else {
1085                 bond_for_each_slave(bond, slave, i) {
1086                         if (strnicmp
1087                             (slave->dev->name, buf,
1088                              strlen(slave->dev->name)) == 0) {
1089                                 old_active = bond->curr_active_slave;
1090                                 new_active = slave;
1091                                 if (new_active && (new_active == old_active)) {
1092                                         /* do nothing */
1093                                         printk(KERN_INFO DRV_NAME
1094                                                ": %s: %s is already the current active slave.\n",
1095                                                bond->dev->name, slave->dev->name);
1096                                         goto out;
1097                                 }
1098                                 else {
1099                                         if ((new_active) &&
1100                                             (old_active) &&
1101                                             (new_active->link == BOND_LINK_UP) &&
1102                                             IS_UP(new_active->dev)) {
1103                                                 printk(KERN_INFO DRV_NAME
1104                                                       ": %s: Setting %s as active slave.\n",
1105                                                       bond->dev->name, slave->dev->name);
1106                                                 bond_change_active_slave(bond, new_active);
1107                                         }
1108                                         else {
1109                                                 printk(KERN_INFO DRV_NAME
1110                                                       ": %s: Could not set %s as active slave; "
1111                                                       "either %s is down or the link is down.\n",
1112                                                       bond->dev->name, slave->dev->name,
1113                                                       slave->dev->name);
1114                                         }
1115                                         goto out;
1116                                 }
1117                         }
1118                 }
1119
1120                 /* if we got here, then we didn't match the name of any slave */
1121
1122                 if (strlen(buf) == 0 || buf[0] == '\n') {
1123                         printk(KERN_INFO DRV_NAME
1124                                ": %s: Setting active slave to None.\n",
1125                                bond->dev->name);
1126                         bond->primary_slave = NULL;
1127                                 bond_select_active_slave(bond);
1128                 } else {
1129                         printk(KERN_INFO DRV_NAME
1130                                ": %s: Unable to set %.*s as active slave as it is not a slave.\n",
1131                                bond->dev->name, (int)strlen(buf) - 1, buf);
1132                 }
1133         }
1134 out:
1135         write_unlock_bh(&bond->lock);
1136         return count;
1137
1138 }
1139 static CLASS_DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR, bonding_show_active_slave, bonding_store_active_slave);
1140
1141
1142 /*
1143  * Show link status of the bond interface.
1144  */
1145 static ssize_t bonding_show_mii_status(struct class_device *cd, char *buf)
1146 {
1147         struct slave *curr;
1148         struct bonding *bond = to_bond(cd);
1149
1150         read_lock(&bond->curr_slave_lock);
1151         curr = bond->curr_active_slave;
1152         read_unlock(&bond->curr_slave_lock);
1153
1154         return sprintf(buf, "%s\n", (curr) ? "up" : "down") + 1;
1155 }
1156 static CLASS_DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1157
1158
1159 /*
1160  * Show current 802.3ad aggregator ID.
1161  */
1162 static ssize_t bonding_show_ad_aggregator(struct class_device *cd, char *buf)
1163 {
1164         int count = 0;
1165         struct bonding *bond = to_bond(cd);
1166
1167         if (bond->params.mode == BOND_MODE_8023AD) {
1168                 struct ad_info ad_info;
1169                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.aggregator_id) + 1;
1170         }
1171         else
1172                 count = sprintf(buf, "\n") + 1;
1173
1174         return count;
1175 }
1176 static CLASS_DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1177
1178
1179 /*
1180  * Show number of active 802.3ad ports.
1181  */
1182 static ssize_t bonding_show_ad_num_ports(struct class_device *cd, char *buf)
1183 {
1184         int count = 0;
1185         struct bonding *bond = to_bond(cd);
1186
1187         if (bond->params.mode == BOND_MODE_8023AD) {
1188                 struct ad_info ad_info;
1189                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0: ad_info.ports) + 1;
1190         }
1191         else
1192                 count = sprintf(buf, "\n") + 1;
1193
1194         return count;
1195 }
1196 static CLASS_DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1197
1198
1199 /*
1200  * Show current 802.3ad actor key.
1201  */
1202 static ssize_t bonding_show_ad_actor_key(struct class_device *cd, char *buf)
1203 {
1204         int count = 0;
1205         struct bonding *bond = to_bond(cd);
1206
1207         if (bond->params.mode == BOND_MODE_8023AD) {
1208                 struct ad_info ad_info;
1209                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.actor_key) + 1;
1210         }
1211         else
1212                 count = sprintf(buf, "\n") + 1;
1213
1214         return count;
1215 }
1216 static CLASS_DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1217
1218
1219 /*
1220  * Show current 802.3ad partner key.
1221  */
1222 static ssize_t bonding_show_ad_partner_key(struct class_device *cd, char *buf)
1223 {
1224         int count = 0;
1225         struct bonding *bond = to_bond(cd);
1226
1227         if (bond->params.mode == BOND_MODE_8023AD) {
1228                 struct ad_info ad_info;
1229                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.partner_key) + 1;
1230         }
1231         else
1232                 count = sprintf(buf, "\n") + 1;
1233
1234         return count;
1235 }
1236 static CLASS_DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1237
1238
1239 /*
1240  * Show current 802.3ad partner mac.
1241  */
1242 static ssize_t bonding_show_ad_partner_mac(struct class_device *cd, char *buf)
1243 {
1244         int count = 0;
1245         struct bonding *bond = to_bond(cd);
1246
1247         if (bond->params.mode == BOND_MODE_8023AD) {
1248                 struct ad_info ad_info;
1249                 if (!bond_3ad_get_active_agg_info(bond, &ad_info)) {
1250                         count = sprintf(buf,"%02x:%02x:%02x:%02x:%02x:%02x\n",
1251                                        ad_info.partner_system[0],
1252                                        ad_info.partner_system[1],
1253                                        ad_info.partner_system[2],
1254                                        ad_info.partner_system[3],
1255                                        ad_info.partner_system[4],
1256                                        ad_info.partner_system[5]) + 1;
1257                 }
1258         }
1259         else
1260                 count = sprintf(buf, "\n") + 1;
1261
1262         return count;
1263 }
1264 static CLASS_DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1265
1266
1267
1268 static struct attribute *per_bond_attrs[] = {
1269         &class_device_attr_slaves.attr,
1270         &class_device_attr_mode.attr,
1271         &class_device_attr_arp_interval.attr,
1272         &class_device_attr_arp_ip_target.attr,
1273         &class_device_attr_downdelay.attr,
1274         &class_device_attr_updelay.attr,
1275         &class_device_attr_lacp_rate.attr,
1276         &class_device_attr_xmit_hash_policy.attr,
1277         &class_device_attr_miimon.attr,
1278         &class_device_attr_primary.attr,
1279         &class_device_attr_use_carrier.attr,
1280         &class_device_attr_active_slave.attr,
1281         &class_device_attr_mii_status.attr,
1282         &class_device_attr_ad_aggregator.attr,
1283         &class_device_attr_ad_num_ports.attr,
1284         &class_device_attr_ad_actor_key.attr,
1285         &class_device_attr_ad_partner_key.attr,
1286         &class_device_attr_ad_partner_mac.attr,
1287         NULL,
1288 };
1289
1290 static struct attribute_group bonding_group = {
1291         .name = "bonding",
1292         .attrs = per_bond_attrs,
1293 };
1294
1295 /*
1296  * Initialize sysfs.  This sets up the bonding_masters file in
1297  * /sys/class/net.
1298  */
1299 int bond_create_sysfs(void)
1300 {
1301         int ret = 0;
1302         struct bonding *firstbond;
1303
1304         init_rwsem(&bonding_rwsem);
1305
1306         /* get the netdev class pointer */
1307         firstbond = container_of(bond_dev_list.next, struct bonding, bond_list);
1308         if (!firstbond)
1309                 return -ENODEV;
1310
1311         netdev_class = firstbond->dev->class_dev.class;
1312         if (!netdev_class)
1313                 return -ENODEV;
1314
1315         ret = class_create_file(netdev_class, &class_attr_bonding_masters);
1316
1317         return ret;
1318
1319 }
1320
1321 /*
1322  * Remove /sys/class/net/bonding_masters.
1323  */
1324 void bond_destroy_sysfs(void)
1325 {
1326         if (netdev_class)
1327                 class_remove_file(netdev_class, &class_attr_bonding_masters);
1328 }
1329
1330 /*
1331  * Initialize sysfs for each bond.  This sets up and registers
1332  * the 'bondctl' directory for each individual bond under /sys/class/net.
1333  */
1334 int bond_create_sysfs_entry(struct bonding *bond)
1335 {
1336         struct net_device *dev = bond->dev;
1337         int err;
1338
1339         err = sysfs_create_group(&(dev->class_dev.kobj), &bonding_group);
1340         if (err) {
1341                 printk(KERN_EMERG "eek! didn't create group!\n");
1342         }
1343
1344         if (expected_refcount < 1)
1345                 expected_refcount = atomic_read(&bond->dev->class_dev.kobj.kref.refcount);
1346
1347         return err;
1348 }
1349 /*
1350  * Remove sysfs entries for each bond.
1351  */
1352 void bond_destroy_sysfs_entry(struct bonding *bond)
1353 {
1354         struct net_device *dev = bond->dev;
1355
1356         sysfs_remove_group(&(dev->class_dev.kobj), &bonding_group);
1357 }
1358