ca4e429f9ec2505a2ab4d97314357077f06dcec3
[linux-2.6.git] / 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/kernel.h>
24 #include <linux/module.h>
25 #include <linux/device.h>
26 #include <linux/sysdev.h>
27 #include <linux/fs.h>
28 #include <linux/types.h>
29 #include <linux/string.h>
30 #include <linux/netdevice.h>
31 #include <linux/inetdevice.h>
32 #include <linux/in.h>
33 #include <linux/sysfs.h>
34 #include <linux/ctype.h>
35 #include <linux/inet.h>
36 #include <linux/rtnetlink.h>
37 #include <net/net_namespace.h>
38
39 /* #define BONDING_DEBUG 1 */
40 #include "bonding.h"
41 #define to_dev(obj)     container_of(obj,struct device,kobj)
42 #define to_bond(cd)     ((struct bonding *)(to_net_dev(cd)->priv))
43
44 /*---------------------------- Declarations -------------------------------*/
45
46
47 extern struct list_head bond_dev_list;
48 extern struct bond_params bonding_defaults;
49 extern struct bond_parm_tbl bond_mode_tbl[];
50 extern struct bond_parm_tbl bond_lacp_tbl[];
51 extern struct bond_parm_tbl xmit_hashtype_tbl[];
52 extern struct bond_parm_tbl arp_validate_tbl[];
53
54 static int expected_refcount = -1;
55 static struct class *netdev_class;
56 /*--------------------------- Data Structures -----------------------------*/
57
58 /* Bonding sysfs lock.  Why can't we just use the subsytem lock?
59  * Because kobject_register tries to acquire the subsystem lock.  If
60  * we already hold the lock (which we would if the user was creating
61  * a new bond through the sysfs interface), we deadlock.
62  * This lock is only needed when deleting a bond - we need to make sure
63  * that we don't collide with an ongoing ioctl.
64  */
65
66 struct rw_semaphore bonding_rwsem;
67
68
69
70
71 /*------------------------------ Functions --------------------------------*/
72
73 /*
74  * "show" function for the bond_masters attribute.
75  * The class parameter is ignored.
76  */
77 static ssize_t bonding_show_bonds(struct class *cls, char *buffer)
78 {
79         int res = 0;
80         struct bonding *bond;
81
82         down_read(&(bonding_rwsem));
83
84         list_for_each_entry(bond, &bond_dev_list, bond_list) {
85                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
86                         /* not enough space for another interface name */
87                         if ((PAGE_SIZE - res) > 10)
88                                 res = PAGE_SIZE - 10;
89                         res += sprintf(buffer + res, "++more++");
90                         break;
91                 }
92                 res += sprintf(buffer + res, "%s ",
93                                bond->dev->name);
94         }
95         res += sprintf(buffer + res, "\n");
96         res++;
97         up_read(&(bonding_rwsem));
98         return res;
99 }
100
101 /*
102  * "store" function for the bond_masters attribute.  This is what
103  * creates and deletes entire bonds.
104  *
105  * The class parameter is ignored.
106  *
107  */
108
109 static ssize_t bonding_store_bonds(struct class *cls, const char *buffer, size_t count)
110 {
111         char command[IFNAMSIZ + 1] = {0, };
112         char *ifname;
113         int res = count;
114         struct bonding *bond;
115         struct bonding *nxt;
116
117         down_write(&(bonding_rwsem));
118         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
119         ifname = command + 1;
120         if ((strlen(command) <= 1) ||
121             !dev_valid_name(ifname))
122                 goto err_no_cmd;
123
124         if (command[0] == '+') {
125
126                 /* Check to see if the bond already exists. */
127                 list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list)
128                         if (strnicmp(bond->dev->name, ifname, IFNAMSIZ) == 0) {
129                                 printk(KERN_ERR DRV_NAME
130                                         ": cannot add bond %s; it already exists\n",
131                                         ifname);
132                                 res = -EPERM;
133                                 goto out;
134                         }
135
136                 printk(KERN_INFO DRV_NAME
137                         ": %s is being created...\n", ifname);
138                 if (bond_create(ifname, &bonding_defaults, &bond)) {
139                         printk(KERN_INFO DRV_NAME
140                         ": %s interface already exists. Bond creation failed.\n",
141                         ifname);
142                         res = -EPERM;
143                 }
144                 goto out;
145         }
146
147         if (command[0] == '-') {
148                 list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list)
149                         if (strnicmp(bond->dev->name, ifname, IFNAMSIZ) == 0) {
150                                 rtnl_lock();
151                                 /* check the ref count on the bond's kobject.
152                                  * If it's > expected, then there's a file open,
153                                  * and we have to fail.
154                                  */
155                                 if (atomic_read(&bond->dev->dev.kobj.kref.refcount)
156                                                         > expected_refcount){
157                                         rtnl_unlock();
158                                         printk(KERN_INFO DRV_NAME
159                                                 ": Unable remove bond %s due to open references.\n",
160                                                 ifname);
161                                         res = -EPERM;
162                                         goto out;
163                                 }
164                                 printk(KERN_INFO DRV_NAME
165                                         ": %s is being deleted...\n",
166                                         bond->dev->name);
167                                 bond_deinit(bond->dev);
168                                 bond_destroy_sysfs_entry(bond);
169                                 unregister_netdevice(bond->dev);
170                                 rtnl_unlock();
171                                 goto out;
172                         }
173
174                 printk(KERN_ERR DRV_NAME
175                         ": unable to delete non-existent bond %s\n", ifname);
176                 res = -ENODEV;
177                 goto out;
178         }
179
180 err_no_cmd:
181         printk(KERN_ERR DRV_NAME
182                 ": no command found in bonding_masters. Use +ifname or -ifname.\n");
183         res = -EPERM;
184
185         /* Always return either count or an error.  If you return 0, you'll
186          * get called forever, which is bad.
187          */
188 out:
189         up_write(&(bonding_rwsem));
190         return res;
191 }
192 /* class attribute for bond_masters file.  This ends up in /sys/class/net */
193 static CLASS_ATTR(bonding_masters,  S_IWUSR | S_IRUGO,
194                   bonding_show_bonds, bonding_store_bonds);
195
196 int bond_create_slave_symlinks(struct net_device *master, struct net_device *slave)
197 {
198         char linkname[IFNAMSIZ+7];
199         int ret = 0;
200
201         /* first, create a link from the slave back to the master */
202         ret = sysfs_create_link(&(slave->dev.kobj), &(master->dev.kobj),
203                                 "master");
204         if (ret)
205                 return ret;
206         /* next, create a link from the master to the slave */
207         sprintf(linkname,"slave_%s",slave->name);
208         ret = sysfs_create_link(&(master->dev.kobj), &(slave->dev.kobj),
209                                 linkname);
210         return ret;
211
212 }
213
214 void bond_destroy_slave_symlinks(struct net_device *master, struct net_device *slave)
215 {
216         char linkname[IFNAMSIZ+7];
217
218         sysfs_remove_link(&(slave->dev.kobj), "master");
219         sprintf(linkname,"slave_%s",slave->name);
220         sysfs_remove_link(&(master->dev.kobj), linkname);
221 }
222
223
224 /*
225  * Show the slaves in the current bond.
226  */
227 static ssize_t bonding_show_slaves(struct device *d,
228                                    struct device_attribute *attr, char *buf)
229 {
230         struct slave *slave;
231         int i, res = 0;
232         struct bonding *bond = to_bond(d);
233
234         read_lock_bh(&bond->lock);
235         bond_for_each_slave(bond, slave, i) {
236                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
237                         /* not enough space for another interface name */
238                         if ((PAGE_SIZE - res) > 10)
239                                 res = PAGE_SIZE - 10;
240                         res += sprintf(buf + res, "++more++");
241                         break;
242                 }
243                 res += sprintf(buf + res, "%s ", slave->dev->name);
244         }
245         read_unlock_bh(&bond->lock);
246         res += sprintf(buf + res, "\n");
247         res++;
248         return res;
249 }
250
251 /*
252  * Set the slaves in the current bond.  The bond interface must be
253  * up for this to succeed.
254  * This function is largely the same flow as bonding_update_bonds().
255  */
256 static ssize_t bonding_store_slaves(struct device *d,
257                                     struct device_attribute *attr,
258                                     const char *buffer, size_t count)
259 {
260         char command[IFNAMSIZ + 1] = { 0, };
261         char *ifname;
262         int i, res, found, ret = count;
263         struct slave *slave;
264         struct net_device *dev = NULL;
265         struct bonding *bond = to_bond(d);
266
267         /* Quick sanity check -- is the bond interface up? */
268         if (!(bond->dev->flags & IFF_UP)) {
269                 printk(KERN_WARNING DRV_NAME
270                        ": %s: doing slave updates when interface is down.\n",
271                        bond->dev->name);
272         }
273
274         /* Note:  We can't hold bond->lock here, as bond_create grabs it. */
275
276         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
277         ifname = command + 1;
278         if ((strlen(command) <= 1) ||
279             !dev_valid_name(ifname))
280                 goto err_no_cmd;
281
282         if (command[0] == '+') {
283
284                 /* Got a slave name in ifname.  Is it already in the list? */
285                 found = 0;
286                 read_lock_bh(&bond->lock);
287                 bond_for_each_slave(bond, slave, i)
288                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
289                                 printk(KERN_ERR DRV_NAME
290                                        ": %s: Interface %s is already enslaved!\n",
291                                        bond->dev->name, ifname);
292                                 ret = -EPERM;
293                                 read_unlock_bh(&bond->lock);
294                                 goto out;
295                         }
296
297                 read_unlock_bh(&bond->lock);
298                 printk(KERN_INFO DRV_NAME ": %s: Adding slave %s.\n",
299                        bond->dev->name, ifname);
300                 dev = dev_get_by_name(&init_net, ifname);
301                 if (!dev) {
302                         printk(KERN_INFO DRV_NAME
303                                ": %s: Interface %s does not exist!\n",
304                                bond->dev->name, ifname);
305                         ret = -EPERM;
306                         goto out;
307                 }
308                 else
309                         dev_put(dev);
310
311                 if (dev->flags & IFF_UP) {
312                         printk(KERN_ERR DRV_NAME
313                                ": %s: Error: Unable to enslave %s "
314                                "because it is already up.\n",
315                                bond->dev->name, dev->name);
316                         ret = -EPERM;
317                         goto out;
318                 }
319                 /* If this is the first slave, then we need to set
320                    the master's hardware address to be the same as the
321                    slave's. */
322                 if (!(*((u32 *) & (bond->dev->dev_addr[0])))) {
323                         memcpy(bond->dev->dev_addr, dev->dev_addr,
324                                dev->addr_len);
325                 }
326
327                 /* Set the slave's MTU to match the bond */
328                 if (dev->mtu != bond->dev->mtu) {
329                         if (dev->change_mtu) {
330                                 res = dev->change_mtu(dev,
331                                                       bond->dev->mtu);
332                                 if (res) {
333                                         ret = res;
334                                         goto out;
335                                 }
336                         } else {
337                                 dev->mtu = bond->dev->mtu;
338                         }
339                 }
340                 rtnl_lock();
341                 res = bond_enslave(bond->dev, dev);
342                 rtnl_unlock();
343                 if (res) {
344                         ret = res;
345                 }
346                 goto out;
347         }
348
349         if (command[0] == '-') {
350                 dev = NULL;
351                 bond_for_each_slave(bond, slave, i)
352                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
353                                 dev = slave->dev;
354                                 break;
355                         }
356                 if (dev) {
357                         printk(KERN_INFO DRV_NAME ": %s: Removing slave %s\n",
358                                 bond->dev->name, dev->name);
359                         rtnl_lock();
360                         res = bond_release(bond->dev, dev);
361                         rtnl_unlock();
362                         if (res) {
363                                 ret = res;
364                                 goto out;
365                         }
366                         /* set the slave MTU to the default */
367                         if (dev->change_mtu) {
368                                 dev->change_mtu(dev, 1500);
369                         } else {
370                                 dev->mtu = 1500;
371                         }
372                 }
373                 else {
374                         printk(KERN_ERR DRV_NAME ": unable to remove non-existent slave %s for bond %s.\n",
375                                 ifname, bond->dev->name);
376                         ret = -ENODEV;
377                 }
378                 goto out;
379         }
380
381 err_no_cmd:
382         printk(KERN_ERR DRV_NAME ": no command found in slaves file for bond %s. Use +ifname or -ifname.\n", bond->dev->name);
383         ret = -EPERM;
384
385 out:
386         return ret;
387 }
388
389 static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves, bonding_store_slaves);
390
391 /*
392  * Show and set the bonding mode.  The bond interface must be down to
393  * change the mode.
394  */
395 static ssize_t bonding_show_mode(struct device *d,
396                                  struct device_attribute *attr, char *buf)
397 {
398         struct bonding *bond = to_bond(d);
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 device *d,
406                                   struct device_attribute *attr,
407                                   const char *buf, size_t count)
408 {
409         int new_value, ret = count;
410         struct bonding *bond = to_bond(d);
411
412         if (bond->dev->flags & IFF_UP) {
413                 printk(KERN_ERR DRV_NAME
414                        ": unable to update mode of %s because interface is up.\n",
415                        bond->dev->name);
416                 ret = -EPERM;
417                 goto out;
418         }
419
420         new_value = bond_parse_parm((char *)buf, bond_mode_tbl);
421         if (new_value < 0)  {
422                 printk(KERN_ERR DRV_NAME
423                        ": %s: Ignoring invalid mode value %.*s.\n",
424                        bond->dev->name,
425                        (int)strlen(buf) - 1, buf);
426                 ret = -EINVAL;
427                 goto out;
428         } else {
429                 if (bond->params.mode == BOND_MODE_8023AD)
430                         bond_unset_master_3ad_flags(bond);
431
432                 if (bond->params.mode == BOND_MODE_ALB)
433                         bond_unset_master_alb_flags(bond);
434
435                 bond->params.mode = new_value;
436                 bond_set_mode_ops(bond, bond->params.mode);
437                 printk(KERN_INFO DRV_NAME ": %s: setting mode to %s (%d).\n",
438                         bond->dev->name, bond_mode_tbl[new_value].modename, new_value);
439         }
440 out:
441         return ret;
442 }
443 static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR, bonding_show_mode, bonding_store_mode);
444
445 /*
446  * Show and set the bonding transmit hash method.  The bond interface must be down to
447  * change the xmit hash policy.
448  */
449 static ssize_t bonding_show_xmit_hash(struct device *d,
450                                       struct device_attribute *attr,
451                                       char *buf)
452 {
453         int count;
454         struct bonding *bond = to_bond(d);
455
456         if ((bond->params.mode != BOND_MODE_XOR) &&
457             (bond->params.mode != BOND_MODE_8023AD)) {
458                 // Not Applicable
459                 count = sprintf(buf, "NA\n") + 1;
460         } else {
461                 count = sprintf(buf, "%s %d\n",
462                         xmit_hashtype_tbl[bond->params.xmit_policy].modename,
463                         bond->params.xmit_policy) + 1;
464         }
465
466         return count;
467 }
468
469 static ssize_t bonding_store_xmit_hash(struct device *d,
470                                        struct device_attribute *attr,
471                                        const char *buf, size_t count)
472 {
473         int new_value, ret = count;
474         struct bonding *bond = to_bond(d);
475
476         if (bond->dev->flags & IFF_UP) {
477                 printk(KERN_ERR DRV_NAME
478                        "%s: Interface is up. Unable to update xmit policy.\n",
479                        bond->dev->name);
480                 ret = -EPERM;
481                 goto out;
482         }
483
484         if ((bond->params.mode != BOND_MODE_XOR) &&
485             (bond->params.mode != BOND_MODE_8023AD)) {
486                 printk(KERN_ERR DRV_NAME
487                        "%s: Transmit hash policy is irrelevant in this mode.\n",
488                        bond->dev->name);
489                 ret = -EPERM;
490                 goto out;
491         }
492
493         new_value = bond_parse_parm((char *)buf, xmit_hashtype_tbl);
494         if (new_value < 0)  {
495                 printk(KERN_ERR DRV_NAME
496                        ": %s: Ignoring invalid xmit hash policy value %.*s.\n",
497                        bond->dev->name,
498                        (int)strlen(buf) - 1, buf);
499                 ret = -EINVAL;
500                 goto out;
501         } else {
502                 bond->params.xmit_policy = new_value;
503                 bond_set_mode_ops(bond, bond->params.mode);
504                 printk(KERN_INFO DRV_NAME ": %s: setting xmit hash policy to %s (%d).\n",
505                         bond->dev->name, xmit_hashtype_tbl[new_value].modename, new_value);
506         }
507 out:
508         return ret;
509 }
510 static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR, bonding_show_xmit_hash, bonding_store_xmit_hash);
511
512 /*
513  * Show and set arp_validate.
514  */
515 static ssize_t bonding_show_arp_validate(struct device *d,
516                                          struct device_attribute *attr,
517                                          char *buf)
518 {
519         struct bonding *bond = to_bond(d);
520
521         return sprintf(buf, "%s %d\n",
522                        arp_validate_tbl[bond->params.arp_validate].modename,
523                        bond->params.arp_validate) + 1;
524 }
525
526 static ssize_t bonding_store_arp_validate(struct device *d,
527                                           struct device_attribute *attr,
528                                           const char *buf, size_t count)
529 {
530         int new_value;
531         struct bonding *bond = to_bond(d);
532
533         new_value = bond_parse_parm((char *)buf, arp_validate_tbl);
534         if (new_value < 0) {
535                 printk(KERN_ERR DRV_NAME
536                        ": %s: Ignoring invalid arp_validate value %s\n",
537                        bond->dev->name, buf);
538                 return -EINVAL;
539         }
540         if (new_value && (bond->params.mode != BOND_MODE_ACTIVEBACKUP)) {
541                 printk(KERN_ERR DRV_NAME
542                        ": %s: arp_validate only supported in active-backup mode.\n",
543                        bond->dev->name);
544                 return -EINVAL;
545         }
546         printk(KERN_INFO DRV_NAME ": %s: setting arp_validate to %s (%d).\n",
547                bond->dev->name, arp_validate_tbl[new_value].modename,
548                new_value);
549
550         if (!bond->params.arp_validate && new_value) {
551                 bond_register_arp(bond);
552         } else if (bond->params.arp_validate && !new_value) {
553                 bond_unregister_arp(bond);
554         }
555
556         bond->params.arp_validate = new_value;
557
558         return count;
559 }
560
561 static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate, bonding_store_arp_validate);
562
563 /*
564  * Show and set the arp timer interval.  There are two tricky bits
565  * here.  First, if ARP monitoring is activated, then we must disable
566  * MII monitoring.  Second, if the ARP timer isn't running, we must
567  * start it.
568  */
569 static ssize_t bonding_show_arp_interval(struct device *d,
570                                          struct device_attribute *attr,
571                                          char *buf)
572 {
573         struct bonding *bond = to_bond(d);
574
575         return sprintf(buf, "%d\n", bond->params.arp_interval) + 1;
576 }
577
578 static ssize_t bonding_store_arp_interval(struct device *d,
579                                           struct device_attribute *attr,
580                                           const char *buf, size_t count)
581 {
582         int new_value, ret = count;
583         struct bonding *bond = to_bond(d);
584
585         if (sscanf(buf, "%d", &new_value) != 1) {
586                 printk(KERN_ERR DRV_NAME
587                        ": %s: no arp_interval value specified.\n",
588                        bond->dev->name);
589                 ret = -EINVAL;
590                 goto out;
591         }
592         if (new_value < 0) {
593                 printk(KERN_ERR DRV_NAME
594                        ": %s: Invalid arp_interval value %d not in range 1-%d; rejected.\n",
595                        bond->dev->name, new_value, INT_MAX);
596                 ret = -EINVAL;
597                 goto out;
598         }
599
600         printk(KERN_INFO DRV_NAME
601                ": %s: Setting ARP monitoring interval to %d.\n",
602                bond->dev->name, new_value);
603         bond->params.arp_interval = new_value;
604         if (bond->params.miimon) {
605                 printk(KERN_INFO DRV_NAME
606                        ": %s: ARP monitoring cannot be used with MII monitoring. "
607                        "%s Disabling MII monitoring.\n",
608                        bond->dev->name, bond->dev->name);
609                 bond->params.miimon = 0;
610                 /* Kill MII timer, else it brings bond's link down */
611                 if (bond->arp_timer.function) {
612                         printk(KERN_INFO DRV_NAME
613                         ": %s: Kill MII timer, else it brings bond's link down...\n",
614                        bond->dev->name);
615                         del_timer_sync(&bond->mii_timer);
616                 }
617         }
618         if (!bond->params.arp_targets[0]) {
619                 printk(KERN_INFO DRV_NAME
620                        ": %s: ARP monitoring has been set up, "
621                        "but no ARP targets have been specified.\n",
622                        bond->dev->name);
623         }
624         if (bond->dev->flags & IFF_UP) {
625                 /* If the interface is up, we may need to fire off
626                  * the ARP timer.  If the interface is down, the
627                  * timer will get fired off when the open function
628                  * is called.
629                  */
630                 if (bond->arp_timer.function) {
631                         /* The timer's already set up, so fire it off */
632                         mod_timer(&bond->arp_timer, jiffies + 1);
633                 } else {
634                         /* Set up the timer. */
635                         init_timer(&bond->arp_timer);
636                         bond->arp_timer.expires = jiffies + 1;
637                         bond->arp_timer.data =
638                                 (unsigned long) bond->dev;
639                         if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) {
640                                 bond->arp_timer.function =
641                                         (void *)
642                                         &bond_activebackup_arp_mon;
643                         } else {
644                                 bond->arp_timer.function =
645                                         (void *)
646                                         &bond_loadbalance_arp_mon;
647                         }
648                         add_timer(&bond->arp_timer);
649                 }
650         }
651
652 out:
653         return ret;
654 }
655 static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR , bonding_show_arp_interval, bonding_store_arp_interval);
656
657 /*
658  * Show and set the arp targets.
659  */
660 static ssize_t bonding_show_arp_targets(struct device *d,
661                                         struct device_attribute *attr,
662                                         char *buf)
663 {
664         int i, res = 0;
665         struct bonding *bond = to_bond(d);
666
667         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
668                 if (bond->params.arp_targets[i])
669                         res += sprintf(buf + res, "%u.%u.%u.%u ",
670                                NIPQUAD(bond->params.arp_targets[i]));
671         }
672         if (res)
673                 res--;  /* eat the leftover space */
674         res += sprintf(buf + res, "\n");
675         res++;
676         return res;
677 }
678
679 static ssize_t bonding_store_arp_targets(struct device *d,
680                                          struct device_attribute *attr,
681                                          const char *buf, size_t count)
682 {
683         __be32 newtarget;
684         int i = 0, done = 0, ret = count;
685         struct bonding *bond = to_bond(d);
686         __be32 *targets;
687
688         targets = bond->params.arp_targets;
689         newtarget = in_aton(buf + 1);
690         /* look for adds */
691         if (buf[0] == '+') {
692                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
693                         printk(KERN_ERR DRV_NAME
694                                ": %s: invalid ARP target %u.%u.%u.%u specified for addition\n",
695                                bond->dev->name, NIPQUAD(newtarget));
696                         ret = -EINVAL;
697                         goto out;
698                 }
699                 /* look for an empty slot to put the target in, and check for dupes */
700                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
701                         if (targets[i] == newtarget) { /* duplicate */
702                                 printk(KERN_ERR DRV_NAME
703                                        ": %s: ARP target %u.%u.%u.%u is already present\n",
704                                        bond->dev->name, NIPQUAD(newtarget));
705                                 if (done)
706                                         targets[i] = 0;
707                                 ret = -EINVAL;
708                                 goto out;
709                         }
710                         if (targets[i] == 0 && !done) {
711                                 printk(KERN_INFO DRV_NAME
712                                        ": %s: adding ARP target %d.%d.%d.%d.\n",
713                                        bond->dev->name, NIPQUAD(newtarget));
714                                 done = 1;
715                                 targets[i] = newtarget;
716                         }
717                 }
718                 if (!done) {
719                         printk(KERN_ERR DRV_NAME
720                                ": %s: ARP target table is full!\n",
721                                bond->dev->name);
722                         ret = -EINVAL;
723                         goto out;
724                 }
725
726         }
727         else if (buf[0] == '-') {
728                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
729                         printk(KERN_ERR DRV_NAME
730                                ": %s: invalid ARP target %d.%d.%d.%d specified for removal\n",
731                                bond->dev->name, NIPQUAD(newtarget));
732                         ret = -EINVAL;
733                         goto out;
734                 }
735
736                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
737                         if (targets[i] == newtarget) {
738                                 printk(KERN_INFO DRV_NAME
739                                        ": %s: removing ARP target %d.%d.%d.%d.\n",
740                                        bond->dev->name, NIPQUAD(newtarget));
741                                 targets[i] = 0;
742                                 done = 1;
743                         }
744                 }
745                 if (!done) {
746                         printk(KERN_INFO DRV_NAME
747                                ": %s: unable to remove nonexistent ARP target %d.%d.%d.%d.\n",
748                                bond->dev->name, NIPQUAD(newtarget));
749                         ret = -EINVAL;
750                         goto out;
751                 }
752         }
753         else {
754                 printk(KERN_ERR DRV_NAME ": no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
755                         bond->dev->name);
756                 ret = -EPERM;
757                 goto out;
758         }
759
760 out:
761         return ret;
762 }
763 static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
764
765 /*
766  * Show and set the up and down delays.  These must be multiples of the
767  * MII monitoring value, and are stored internally as the multiplier.
768  * Thus, we must translate to MS for the real world.
769  */
770 static ssize_t bonding_show_downdelay(struct device *d,
771                                       struct device_attribute *attr,
772                                       char *buf)
773 {
774         struct bonding *bond = to_bond(d);
775
776         return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon) + 1;
777 }
778
779 static ssize_t bonding_store_downdelay(struct device *d,
780                                        struct device_attribute *attr,
781                                        const char *buf, size_t count)
782 {
783         int new_value, ret = count;
784         struct bonding *bond = to_bond(d);
785
786         if (!(bond->params.miimon)) {
787                 printk(KERN_ERR DRV_NAME
788                        ": %s: Unable to set down delay as MII monitoring is disabled\n",
789                        bond->dev->name);
790                 ret = -EPERM;
791                 goto out;
792         }
793
794         if (sscanf(buf, "%d", &new_value) != 1) {
795                 printk(KERN_ERR DRV_NAME
796                        ": %s: no down delay value specified.\n",
797                        bond->dev->name);
798                 ret = -EINVAL;
799                 goto out;
800         }
801         if (new_value < 0) {
802                 printk(KERN_ERR DRV_NAME
803                        ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
804                        bond->dev->name, new_value, 1, INT_MAX);
805                 ret = -EINVAL;
806                 goto out;
807         } else {
808                 if ((new_value % bond->params.miimon) != 0) {
809                         printk(KERN_WARNING DRV_NAME
810                                ": %s: Warning: down delay (%d) is not a multiple "
811                                "of miimon (%d), delay rounded to %d ms\n",
812                                bond->dev->name, new_value, bond->params.miimon,
813                                (new_value / bond->params.miimon) *
814                                bond->params.miimon);
815                 }
816                 bond->params.downdelay = new_value / bond->params.miimon;
817                 printk(KERN_INFO DRV_NAME ": %s: Setting down delay to %d.\n",
818                        bond->dev->name, bond->params.downdelay * bond->params.miimon);
819
820         }
821
822 out:
823         return ret;
824 }
825 static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR , bonding_show_downdelay, bonding_store_downdelay);
826
827 static ssize_t bonding_show_updelay(struct device *d,
828                                     struct device_attribute *attr,
829                                     char *buf)
830 {
831         struct bonding *bond = to_bond(d);
832
833         return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon) + 1;
834
835 }
836
837 static ssize_t bonding_store_updelay(struct device *d,
838                                      struct device_attribute *attr,
839                                      const char *buf, size_t count)
840 {
841         int new_value, ret = count;
842         struct bonding *bond = to_bond(d);
843
844         if (!(bond->params.miimon)) {
845                 printk(KERN_ERR DRV_NAME
846                        ": %s: Unable to set up delay as MII monitoring is disabled\n",
847                        bond->dev->name);
848                 ret = -EPERM;
849                 goto out;
850         }
851
852         if (sscanf(buf, "%d", &new_value) != 1) {
853                 printk(KERN_ERR DRV_NAME
854                        ": %s: no up delay value specified.\n",
855                        bond->dev->name);
856                 ret = -EINVAL;
857                 goto out;
858         }
859         if (new_value < 0) {
860                 printk(KERN_ERR DRV_NAME
861                        ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
862                        bond->dev->name, new_value, 1, INT_MAX);
863                 ret = -EINVAL;
864                 goto out;
865         } else {
866                 if ((new_value % bond->params.miimon) != 0) {
867                         printk(KERN_WARNING DRV_NAME
868                                ": %s: Warning: up delay (%d) is not a multiple "
869                                "of miimon (%d), updelay rounded to %d ms\n",
870                                bond->dev->name, new_value, bond->params.miimon,
871                                (new_value / bond->params.miimon) *
872                                bond->params.miimon);
873                 }
874                 bond->params.updelay = new_value / bond->params.miimon;
875                 printk(KERN_INFO DRV_NAME ": %s: Setting up delay to %d.\n",
876                        bond->dev->name, bond->params.updelay * bond->params.miimon);
877
878         }
879
880 out:
881         return ret;
882 }
883 static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR , bonding_show_updelay, bonding_store_updelay);
884
885 /*
886  * Show and set the LACP interval.  Interface must be down, and the mode
887  * must be set to 802.3ad mode.
888  */
889 static ssize_t bonding_show_lacp(struct device *d,
890                                  struct device_attribute *attr,
891                                  char *buf)
892 {
893         struct bonding *bond = to_bond(d);
894
895         return sprintf(buf, "%s %d\n",
896                 bond_lacp_tbl[bond->params.lacp_fast].modename,
897                 bond->params.lacp_fast) + 1;
898 }
899
900 static ssize_t bonding_store_lacp(struct device *d,
901                                   struct device_attribute *attr,
902                                   const char *buf, size_t count)
903 {
904         int new_value, ret = count;
905         struct bonding *bond = to_bond(d);
906
907         if (bond->dev->flags & IFF_UP) {
908                 printk(KERN_ERR DRV_NAME
909                        ": %s: Unable to update LACP rate because interface is up.\n",
910                        bond->dev->name);
911                 ret = -EPERM;
912                 goto out;
913         }
914
915         if (bond->params.mode != BOND_MODE_8023AD) {
916                 printk(KERN_ERR DRV_NAME
917                        ": %s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
918                        bond->dev->name);
919                 ret = -EPERM;
920                 goto out;
921         }
922
923         new_value = bond_parse_parm((char *)buf, bond_lacp_tbl);
924
925         if ((new_value == 1) || (new_value == 0)) {
926                 bond->params.lacp_fast = new_value;
927                 printk(KERN_INFO DRV_NAME
928                        ": %s: Setting LACP rate to %s (%d).\n",
929                        bond->dev->name, bond_lacp_tbl[new_value].modename, new_value);
930         } else {
931                 printk(KERN_ERR DRV_NAME
932                        ": %s: Ignoring invalid LACP rate value %.*s.\n",
933                         bond->dev->name, (int)strlen(buf) - 1, buf);
934                 ret = -EINVAL;
935         }
936 out:
937         return ret;
938 }
939 static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR, bonding_show_lacp, bonding_store_lacp);
940
941 /*
942  * Show and set the MII monitor interval.  There are two tricky bits
943  * here.  First, if MII monitoring is activated, then we must disable
944  * ARP monitoring.  Second, if the timer isn't running, we must
945  * start it.
946  */
947 static ssize_t bonding_show_miimon(struct device *d,
948                                    struct device_attribute *attr,
949                                    char *buf)
950 {
951         struct bonding *bond = to_bond(d);
952
953         return sprintf(buf, "%d\n", bond->params.miimon) + 1;
954 }
955
956 static ssize_t bonding_store_miimon(struct device *d,
957                                     struct device_attribute *attr,
958                                     const char *buf, size_t count)
959 {
960         int new_value, ret = count;
961         struct bonding *bond = to_bond(d);
962
963         if (sscanf(buf, "%d", &new_value) != 1) {
964                 printk(KERN_ERR DRV_NAME
965                        ": %s: no miimon value specified.\n",
966                        bond->dev->name);
967                 ret = -EINVAL;
968                 goto out;
969         }
970         if (new_value < 0) {
971                 printk(KERN_ERR DRV_NAME
972                        ": %s: Invalid miimon value %d not in range %d-%d; rejected.\n",
973                        bond->dev->name, new_value, 1, INT_MAX);
974                 ret = -EINVAL;
975                 goto out;
976         } else {
977                 printk(KERN_INFO DRV_NAME
978                        ": %s: Setting MII monitoring interval to %d.\n",
979                        bond->dev->name, new_value);
980                 bond->params.miimon = new_value;
981                 if(bond->params.updelay)
982                         printk(KERN_INFO DRV_NAME
983                               ": %s: Note: Updating updelay (to %d) "
984                               "since it is a multiple of the miimon value.\n",
985                               bond->dev->name,
986                               bond->params.updelay * bond->params.miimon);
987                 if(bond->params.downdelay)
988                         printk(KERN_INFO DRV_NAME
989                               ": %s: Note: Updating downdelay (to %d) "
990                               "since it is a multiple of the miimon value.\n",
991                               bond->dev->name,
992                               bond->params.downdelay * bond->params.miimon);
993                 if (bond->params.arp_interval) {
994                         printk(KERN_INFO DRV_NAME
995                                ": %s: MII monitoring cannot be used with "
996                                "ARP monitoring. Disabling ARP monitoring...\n",
997                                bond->dev->name);
998                         bond->params.arp_interval = 0;
999                         if (bond->params.arp_validate) {
1000                                 bond_unregister_arp(bond);
1001                                 bond->params.arp_validate =
1002                                         BOND_ARP_VALIDATE_NONE;
1003                         }
1004                         /* Kill ARP timer, else it brings bond's link down */
1005                         if (bond->mii_timer.function) {
1006                                 printk(KERN_INFO DRV_NAME
1007                                 ": %s: Kill ARP timer, else it brings bond's link down...\n",
1008                                bond->dev->name);
1009                                 del_timer_sync(&bond->arp_timer);
1010                         }
1011                 }
1012
1013                 if (bond->dev->flags & IFF_UP) {
1014                         /* If the interface is up, we may need to fire off
1015                          * the MII timer. If the interface is down, the
1016                          * timer will get fired off when the open function
1017                          * is called.
1018                          */
1019                         if (bond->mii_timer.function) {
1020                                 /* The timer's already set up, so fire it off */
1021                                 mod_timer(&bond->mii_timer, jiffies + 1);
1022                         } else {
1023                                 /* Set up the timer. */
1024                                 init_timer(&bond->mii_timer);
1025                                 bond->mii_timer.expires = jiffies + 1;
1026                                 bond->mii_timer.data =
1027                                         (unsigned long) bond->dev;
1028                                 bond->mii_timer.function =
1029                                         (void *) &bond_mii_monitor;
1030                                 add_timer(&bond->mii_timer);
1031                         }
1032                 }
1033         }
1034 out:
1035         return ret;
1036 }
1037 static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR, bonding_show_miimon, bonding_store_miimon);
1038
1039 /*
1040  * Show and set the primary slave.  The store function is much
1041  * simpler than bonding_store_slaves function because it only needs to
1042  * handle one interface name.
1043  * The bond must be a mode that supports a primary for this be
1044  * set.
1045  */
1046 static ssize_t bonding_show_primary(struct device *d,
1047                                     struct device_attribute *attr,
1048                                     char *buf)
1049 {
1050         int count = 0;
1051         struct bonding *bond = to_bond(d);
1052
1053         if (bond->primary_slave)
1054                 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name) + 1;
1055         else
1056                 count = sprintf(buf, "\n") + 1;
1057
1058         return count;
1059 }
1060
1061 static ssize_t bonding_store_primary(struct device *d,
1062                                      struct device_attribute *attr,
1063                                      const char *buf, size_t count)
1064 {
1065         int i;
1066         struct slave *slave;
1067         struct bonding *bond = to_bond(d);
1068
1069         write_lock_bh(&bond->lock);
1070         if (!USES_PRIMARY(bond->params.mode)) {
1071                 printk(KERN_INFO DRV_NAME
1072                        ": %s: Unable to set primary slave; %s is in mode %d\n",
1073                        bond->dev->name, bond->dev->name, bond->params.mode);
1074         } else {
1075                 bond_for_each_slave(bond, slave, i) {
1076                         if (strnicmp
1077                             (slave->dev->name, buf,
1078                              strlen(slave->dev->name)) == 0) {
1079                                 printk(KERN_INFO DRV_NAME
1080                                        ": %s: Setting %s as primary slave.\n",
1081                                        bond->dev->name, slave->dev->name);
1082                                 bond->primary_slave = slave;
1083                                 bond_select_active_slave(bond);
1084                                 goto out;
1085                         }
1086                 }
1087
1088                 /* if we got here, then we didn't match the name of any slave */
1089
1090                 if (strlen(buf) == 0 || buf[0] == '\n') {
1091                         printk(KERN_INFO DRV_NAME
1092                                ": %s: Setting primary slave to None.\n",
1093                                bond->dev->name);
1094                         bond->primary_slave = NULL;
1095                                 bond_select_active_slave(bond);
1096                 } else {
1097                         printk(KERN_INFO DRV_NAME
1098                                ": %s: Unable to set %.*s as primary slave as it is not a slave.\n",
1099                                bond->dev->name, (int)strlen(buf) - 1, buf);
1100                 }
1101         }
1102 out:
1103         write_unlock_bh(&bond->lock);
1104         return count;
1105 }
1106 static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR, bonding_show_primary, bonding_store_primary);
1107
1108 /*
1109  * Show and set the use_carrier flag.
1110  */
1111 static ssize_t bonding_show_carrier(struct device *d,
1112                                     struct device_attribute *attr,
1113                                     char *buf)
1114 {
1115         struct bonding *bond = to_bond(d);
1116
1117         return sprintf(buf, "%d\n", bond->params.use_carrier) + 1;
1118 }
1119
1120 static ssize_t bonding_store_carrier(struct device *d,
1121                                      struct device_attribute *attr,
1122                                      const char *buf, size_t count)
1123 {
1124         int new_value, ret = count;
1125         struct bonding *bond = to_bond(d);
1126
1127
1128         if (sscanf(buf, "%d", &new_value) != 1) {
1129                 printk(KERN_ERR DRV_NAME
1130                        ": %s: no use_carrier value specified.\n",
1131                        bond->dev->name);
1132                 ret = -EINVAL;
1133                 goto out;
1134         }
1135         if ((new_value == 0) || (new_value == 1)) {
1136                 bond->params.use_carrier = new_value;
1137                 printk(KERN_INFO DRV_NAME ": %s: Setting use_carrier to %d.\n",
1138                        bond->dev->name, new_value);
1139         } else {
1140                 printk(KERN_INFO DRV_NAME
1141                        ": %s: Ignoring invalid use_carrier value %d.\n",
1142                        bond->dev->name, new_value);
1143         }
1144 out:
1145         return count;
1146 }
1147 static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR, bonding_show_carrier, bonding_store_carrier);
1148
1149
1150 /*
1151  * Show and set currently active_slave.
1152  */
1153 static ssize_t bonding_show_active_slave(struct device *d,
1154                                          struct device_attribute *attr,
1155                                          char *buf)
1156 {
1157         struct slave *curr;
1158         struct bonding *bond = to_bond(d);
1159         int count;
1160
1161
1162         read_lock(&bond->curr_slave_lock);
1163         curr = bond->curr_active_slave;
1164         read_unlock(&bond->curr_slave_lock);
1165
1166         if (USES_PRIMARY(bond->params.mode) && curr)
1167                 count = sprintf(buf, "%s\n", curr->dev->name) + 1;
1168         else
1169                 count = sprintf(buf, "\n") + 1;
1170         return count;
1171 }
1172
1173 static ssize_t bonding_store_active_slave(struct device *d,
1174                                           struct device_attribute *attr,
1175                                           const char *buf, size_t count)
1176 {
1177         int i;
1178         struct slave *slave;
1179         struct slave *old_active = NULL;
1180         struct slave *new_active = NULL;
1181         struct bonding *bond = to_bond(d);
1182
1183         write_lock_bh(&bond->lock);
1184         if (!USES_PRIMARY(bond->params.mode)) {
1185                 printk(KERN_INFO DRV_NAME
1186                        ": %s: Unable to change active slave; %s is in mode %d\n",
1187                        bond->dev->name, bond->dev->name, bond->params.mode);
1188         } else {
1189                 bond_for_each_slave(bond, slave, i) {
1190                         if (strnicmp
1191                             (slave->dev->name, buf,
1192                              strlen(slave->dev->name)) == 0) {
1193                                 old_active = bond->curr_active_slave;
1194                                 new_active = slave;
1195                                 if (new_active == old_active) {
1196                                         /* do nothing */
1197                                         printk(KERN_INFO DRV_NAME
1198                                                ": %s: %s is already the current active slave.\n",
1199                                                bond->dev->name, slave->dev->name);
1200                                         goto out;
1201                                 }
1202                                 else {
1203                                         if ((new_active) &&
1204                                             (old_active) &&
1205                                             (new_active->link == BOND_LINK_UP) &&
1206                                             IS_UP(new_active->dev)) {
1207                                                 printk(KERN_INFO DRV_NAME
1208                                                       ": %s: Setting %s as active slave.\n",
1209                                                       bond->dev->name, slave->dev->name);
1210                                                 bond_change_active_slave(bond, new_active);
1211                                         }
1212                                         else {
1213                                                 printk(KERN_INFO DRV_NAME
1214                                                       ": %s: Could not set %s as active slave; "
1215                                                       "either %s is down or the link is down.\n",
1216                                                       bond->dev->name, slave->dev->name,
1217                                                       slave->dev->name);
1218                                         }
1219                                         goto out;
1220                                 }
1221                         }
1222                 }
1223
1224                 /* if we got here, then we didn't match the name of any slave */
1225
1226                 if (strlen(buf) == 0 || buf[0] == '\n') {
1227                         printk(KERN_INFO DRV_NAME
1228                                ": %s: Setting active slave to None.\n",
1229                                bond->dev->name);
1230                         bond->primary_slave = NULL;
1231                                 bond_select_active_slave(bond);
1232                 } else {
1233                         printk(KERN_INFO DRV_NAME
1234                                ": %s: Unable to set %.*s as active slave as it is not a slave.\n",
1235                                bond->dev->name, (int)strlen(buf) - 1, buf);
1236                 }
1237         }
1238 out:
1239         write_unlock_bh(&bond->lock);
1240         return count;
1241
1242 }
1243 static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR, bonding_show_active_slave, bonding_store_active_slave);
1244
1245
1246 /*
1247  * Show link status of the bond interface.
1248  */
1249 static ssize_t bonding_show_mii_status(struct device *d,
1250                                        struct device_attribute *attr,
1251                                        char *buf)
1252 {
1253         struct slave *curr;
1254         struct bonding *bond = to_bond(d);
1255
1256         read_lock(&bond->curr_slave_lock);
1257         curr = bond->curr_active_slave;
1258         read_unlock(&bond->curr_slave_lock);
1259
1260         return sprintf(buf, "%s\n", (curr) ? "up" : "down") + 1;
1261 }
1262 static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1263
1264
1265 /*
1266  * Show current 802.3ad aggregator ID.
1267  */
1268 static ssize_t bonding_show_ad_aggregator(struct device *d,
1269                                           struct device_attribute *attr,
1270                                           char *buf)
1271 {
1272         int count = 0;
1273         struct bonding *bond = to_bond(d);
1274
1275         if (bond->params.mode == BOND_MODE_8023AD) {
1276                 struct ad_info ad_info;
1277                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.aggregator_id) + 1;
1278         }
1279         else
1280                 count = sprintf(buf, "\n") + 1;
1281
1282         return count;
1283 }
1284 static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1285
1286
1287 /*
1288  * Show number of active 802.3ad ports.
1289  */
1290 static ssize_t bonding_show_ad_num_ports(struct device *d,
1291                                          struct device_attribute *attr,
1292                                          char *buf)
1293 {
1294         int count = 0;
1295         struct bonding *bond = to_bond(d);
1296
1297         if (bond->params.mode == BOND_MODE_8023AD) {
1298                 struct ad_info ad_info;
1299                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0: ad_info.ports) + 1;
1300         }
1301         else
1302                 count = sprintf(buf, "\n") + 1;
1303
1304         return count;
1305 }
1306 static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1307
1308
1309 /*
1310  * Show current 802.3ad actor key.
1311  */
1312 static ssize_t bonding_show_ad_actor_key(struct device *d,
1313                                          struct device_attribute *attr,
1314                                          char *buf)
1315 {
1316         int count = 0;
1317         struct bonding *bond = to_bond(d);
1318
1319         if (bond->params.mode == BOND_MODE_8023AD) {
1320                 struct ad_info ad_info;
1321                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.actor_key) + 1;
1322         }
1323         else
1324                 count = sprintf(buf, "\n") + 1;
1325
1326         return count;
1327 }
1328 static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1329
1330
1331 /*
1332  * Show current 802.3ad partner key.
1333  */
1334 static ssize_t bonding_show_ad_partner_key(struct device *d,
1335                                            struct device_attribute *attr,
1336                                            char *buf)
1337 {
1338         int count = 0;
1339         struct bonding *bond = to_bond(d);
1340
1341         if (bond->params.mode == BOND_MODE_8023AD) {
1342                 struct ad_info ad_info;
1343                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.partner_key) + 1;
1344         }
1345         else
1346                 count = sprintf(buf, "\n") + 1;
1347
1348         return count;
1349 }
1350 static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1351
1352
1353 /*
1354  * Show current 802.3ad partner mac.
1355  */
1356 static ssize_t bonding_show_ad_partner_mac(struct device *d,
1357                                            struct device_attribute *attr,
1358                                            char *buf)
1359 {
1360         int count = 0;
1361         struct bonding *bond = to_bond(d);
1362         DECLARE_MAC_BUF(mac);
1363
1364         if (bond->params.mode == BOND_MODE_8023AD) {
1365                 struct ad_info ad_info;
1366                 if (!bond_3ad_get_active_agg_info(bond, &ad_info)) {
1367                         count = sprintf(buf,"%s\n",
1368                                         print_mac(mac, ad_info.partner_system))
1369                                 + 1;
1370                 }
1371         }
1372         else
1373                 count = sprintf(buf, "\n") + 1;
1374
1375         return count;
1376 }
1377 static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1378
1379
1380
1381 static struct attribute *per_bond_attrs[] = {
1382         &dev_attr_slaves.attr,
1383         &dev_attr_mode.attr,
1384         &dev_attr_arp_validate.attr,
1385         &dev_attr_arp_interval.attr,
1386         &dev_attr_arp_ip_target.attr,
1387         &dev_attr_downdelay.attr,
1388         &dev_attr_updelay.attr,
1389         &dev_attr_lacp_rate.attr,
1390         &dev_attr_xmit_hash_policy.attr,
1391         &dev_attr_miimon.attr,
1392         &dev_attr_primary.attr,
1393         &dev_attr_use_carrier.attr,
1394         &dev_attr_active_slave.attr,
1395         &dev_attr_mii_status.attr,
1396         &dev_attr_ad_aggregator.attr,
1397         &dev_attr_ad_num_ports.attr,
1398         &dev_attr_ad_actor_key.attr,
1399         &dev_attr_ad_partner_key.attr,
1400         &dev_attr_ad_partner_mac.attr,
1401         NULL,
1402 };
1403
1404 static struct attribute_group bonding_group = {
1405         .name = "bonding",
1406         .attrs = per_bond_attrs,
1407 };
1408
1409 /*
1410  * Initialize sysfs.  This sets up the bonding_masters file in
1411  * /sys/class/net.
1412  */
1413 int bond_create_sysfs(void)
1414 {
1415         int ret = 0;
1416         struct bonding *firstbond;
1417
1418         init_rwsem(&bonding_rwsem);
1419
1420         /* get the netdev class pointer */
1421         firstbond = container_of(bond_dev_list.next, struct bonding, bond_list);
1422         if (!firstbond)
1423                 return -ENODEV;
1424
1425         netdev_class = firstbond->dev->dev.class;
1426         if (!netdev_class)
1427                 return -ENODEV;
1428
1429         ret = class_create_file(netdev_class, &class_attr_bonding_masters);
1430         /*
1431          * Permit multiple loads of the module by ignoring failures to
1432          * create the bonding_masters sysfs file.  Bonding devices
1433          * created by second or subsequent loads of the module will
1434          * not be listed in, or controllable by, bonding_masters, but
1435          * will have the usual "bonding" sysfs directory.
1436          *
1437          * This is done to preserve backwards compatibility for
1438          * initscripts/sysconfig, which load bonding multiple times to
1439          * configure multiple bonding devices.
1440          */
1441         if (ret == -EEXIST) {
1442                 netdev_class = NULL;
1443                 return 0;
1444         }
1445
1446         return ret;
1447
1448 }
1449
1450 /*
1451  * Remove /sys/class/net/bonding_masters.
1452  */
1453 void bond_destroy_sysfs(void)
1454 {
1455         if (netdev_class)
1456                 class_remove_file(netdev_class, &class_attr_bonding_masters);
1457 }
1458
1459 /*
1460  * Initialize sysfs for each bond.  This sets up and registers
1461  * the 'bondctl' directory for each individual bond under /sys/class/net.
1462  */
1463 int bond_create_sysfs_entry(struct bonding *bond)
1464 {
1465         struct net_device *dev = bond->dev;
1466         int err;
1467
1468         err = sysfs_create_group(&(dev->dev.kobj), &bonding_group);
1469         if (err) {
1470                 printk(KERN_EMERG "eek! didn't create group!\n");
1471         }
1472
1473         if (expected_refcount < 1)
1474                 expected_refcount = atomic_read(&bond->dev->dev.kobj.kref.refcount);
1475
1476         return err;
1477 }
1478 /*
1479  * Remove sysfs entries for each bond.
1480  */
1481 void bond_destroy_sysfs_entry(struct bonding *bond)
1482 {
1483         struct net_device *dev = bond->dev;
1484
1485         sysfs_remove_group(&(dev->dev.kobj), &bonding_group);
1486 }
1487