drivers/net/bonding: fix sparse warnings: move decls to header file
[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 #include "bonding.h"
40
41 #define to_dev(obj)     container_of(obj,struct device,kobj)
42 #define to_bond(cd)     ((struct bonding *)(netdev_priv(to_net_dev(cd))))
43
44 /*---------------------------- Declarations -------------------------------*/
45
46 static int expected_refcount = -1;
47 /*--------------------------- Data Structures -----------------------------*/
48
49 /* Bonding sysfs lock.  Why can't we just use the subsystem lock?
50  * Because kobject_register tries to acquire the subsystem lock.  If
51  * we already hold the lock (which we would if the user was creating
52  * a new bond through the sysfs interface), we deadlock.
53  * This lock is only needed when deleting a bond - we need to make sure
54  * that we don't collide with an ongoing ioctl.
55  */
56
57 struct rw_semaphore bonding_rwsem;
58
59
60
61
62 /*------------------------------ Functions --------------------------------*/
63
64 /*
65  * "show" function for the bond_masters attribute.
66  * The class parameter is ignored.
67  */
68 static ssize_t bonding_show_bonds(struct class *cls, char *buf)
69 {
70         int res = 0;
71         struct bonding *bond;
72
73         down_read(&(bonding_rwsem));
74
75         list_for_each_entry(bond, &bond_dev_list, bond_list) {
76                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
77                         /* not enough space for another interface name */
78                         if ((PAGE_SIZE - res) > 10)
79                                 res = PAGE_SIZE - 10;
80                         res += sprintf(buf + res, "++more++ ");
81                         break;
82                 }
83                 res += sprintf(buf + res, "%s ", bond->dev->name);
84         }
85         if (res)
86                 buf[res-1] = '\n'; /* eat the leftover space */
87         up_read(&(bonding_rwsem));
88         return res;
89 }
90
91 /*
92  * "store" function for the bond_masters attribute.  This is what
93  * creates and deletes entire bonds.
94  *
95  * The class parameter is ignored.
96  *
97  */
98
99 static ssize_t bonding_store_bonds(struct class *cls, const char *buffer, size_t count)
100 {
101         char command[IFNAMSIZ + 1] = {0, };
102         char *ifname;
103         int rv, res = count;
104         struct bonding *bond;
105
106         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
107         ifname = command + 1;
108         if ((strlen(command) <= 1) ||
109             !dev_valid_name(ifname))
110                 goto err_no_cmd;
111
112         if (command[0] == '+') {
113                 printk(KERN_INFO DRV_NAME
114                         ": %s is being created...\n", ifname);
115                 rv = bond_create(ifname, &bonding_defaults);
116                 if (rv) {
117                         printk(KERN_INFO DRV_NAME ": Bond creation failed.\n");
118                         res = rv;
119                 }
120                 goto out;
121         }
122
123         if (command[0] == '-') {
124                 rtnl_lock();
125                 down_write(&bonding_rwsem);
126
127                 list_for_each_entry(bond, &bond_dev_list, bond_list)
128                         if (strnicmp(bond->dev->name, ifname, IFNAMSIZ) == 0) {
129                                 /* check the ref count on the bond's kobject.
130                                  * If it's > expected, then there's a file open,
131                                  * and we have to fail.
132                                  */
133                                 if (atomic_read(&bond->dev->dev.kobj.kref.refcount)
134                                                         > expected_refcount){
135                                         printk(KERN_INFO DRV_NAME
136                                                 ": Unable remove bond %s due to open references.\n",
137                                                 ifname);
138                                         res = -EPERM;
139                                         goto out_unlock;
140                                 }
141                                 printk(KERN_INFO DRV_NAME
142                                         ": %s is being deleted...\n",
143                                         bond->dev->name);
144                                 bond_destroy(bond);
145                                 goto out_unlock;
146                         }
147
148                 printk(KERN_ERR DRV_NAME
149                         ": unable to delete non-existent bond %s\n", ifname);
150                 res = -ENODEV;
151                 goto out_unlock;
152         }
153
154 err_no_cmd:
155         printk(KERN_ERR DRV_NAME
156                 ": no command found in bonding_masters. Use +ifname or -ifname.\n");
157         return -EPERM;
158
159 out_unlock:
160         up_write(&bonding_rwsem);
161         rtnl_unlock();
162
163         /* Always return either count or an error.  If you return 0, you'll
164          * get called forever, which is bad.
165          */
166 out:
167         return res;
168 }
169 /* class attribute for bond_masters file.  This ends up in /sys/class/net */
170 static CLASS_ATTR(bonding_masters,  S_IWUSR | S_IRUGO,
171                   bonding_show_bonds, bonding_store_bonds);
172
173 int bond_create_slave_symlinks(struct net_device *master, struct net_device *slave)
174 {
175         char linkname[IFNAMSIZ+7];
176         int ret = 0;
177
178         /* first, create a link from the slave back to the master */
179         ret = sysfs_create_link(&(slave->dev.kobj), &(master->dev.kobj),
180                                 "master");
181         if (ret)
182                 return ret;
183         /* next, create a link from the master to the slave */
184         sprintf(linkname,"slave_%s",slave->name);
185         ret = sysfs_create_link(&(master->dev.kobj), &(slave->dev.kobj),
186                                 linkname);
187         return ret;
188
189 }
190
191 void bond_destroy_slave_symlinks(struct net_device *master, struct net_device *slave)
192 {
193         char linkname[IFNAMSIZ+7];
194
195         sysfs_remove_link(&(slave->dev.kobj), "master");
196         sprintf(linkname,"slave_%s",slave->name);
197         sysfs_remove_link(&(master->dev.kobj), linkname);
198 }
199
200
201 /*
202  * Show the slaves in the current bond.
203  */
204 static ssize_t bonding_show_slaves(struct device *d,
205                                    struct device_attribute *attr, char *buf)
206 {
207         struct slave *slave;
208         int i, res = 0;
209         struct bonding *bond = to_bond(d);
210
211         read_lock(&bond->lock);
212         bond_for_each_slave(bond, slave, i) {
213                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
214                         /* not enough space for another interface name */
215                         if ((PAGE_SIZE - res) > 10)
216                                 res = PAGE_SIZE - 10;
217                         res += sprintf(buf + res, "++more++ ");
218                         break;
219                 }
220                 res += sprintf(buf + res, "%s ", slave->dev->name);
221         }
222         read_unlock(&bond->lock);
223         if (res)
224                 buf[res-1] = '\n'; /* eat the leftover space */
225         return res;
226 }
227
228 /*
229  * Set the slaves in the current bond.  The bond interface must be
230  * up for this to succeed.
231  * This function is largely the same flow as bonding_update_bonds().
232  */
233 static ssize_t bonding_store_slaves(struct device *d,
234                                     struct device_attribute *attr,
235                                     const char *buffer, size_t count)
236 {
237         char command[IFNAMSIZ + 1] = { 0, };
238         char *ifname;
239         int i, res, found, ret = count;
240         u32 original_mtu;
241         struct slave *slave;
242         struct net_device *dev = NULL;
243         struct bonding *bond = to_bond(d);
244
245         /* Quick sanity check -- is the bond interface up? */
246         if (!(bond->dev->flags & IFF_UP)) {
247                 printk(KERN_WARNING DRV_NAME
248                        ": %s: doing slave updates when interface is down.\n",
249                        bond->dev->name);
250         }
251
252         /* Note:  We can't hold bond->lock here, as bond_create grabs it. */
253
254         rtnl_lock();
255         down_write(&(bonding_rwsem));
256
257         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
258         ifname = command + 1;
259         if ((strlen(command) <= 1) ||
260             !dev_valid_name(ifname))
261                 goto err_no_cmd;
262
263         if (command[0] == '+') {
264
265                 /* Got a slave name in ifname.  Is it already in the list? */
266                 found = 0;
267                 read_lock(&bond->lock);
268                 bond_for_each_slave(bond, slave, i)
269                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
270                                 printk(KERN_ERR DRV_NAME
271                                        ": %s: Interface %s is already enslaved!\n",
272                                        bond->dev->name, ifname);
273                                 ret = -EPERM;
274                                 read_unlock(&bond->lock);
275                                 goto out;
276                         }
277
278                 read_unlock(&bond->lock);
279                 printk(KERN_INFO DRV_NAME ": %s: Adding slave %s.\n",
280                        bond->dev->name, ifname);
281                 dev = dev_get_by_name(&init_net, ifname);
282                 if (!dev) {
283                         printk(KERN_INFO DRV_NAME
284                                ": %s: Interface %s does not exist!\n",
285                                bond->dev->name, ifname);
286                         ret = -EPERM;
287                         goto out;
288                 }
289                 else
290                         dev_put(dev);
291
292                 if (dev->flags & IFF_UP) {
293                         printk(KERN_ERR DRV_NAME
294                                ": %s: Error: Unable to enslave %s "
295                                "because it is already up.\n",
296                                bond->dev->name, dev->name);
297                         ret = -EPERM;
298                         goto out;
299                 }
300                 /* If this is the first slave, then we need to set
301                    the master's hardware address to be the same as the
302                    slave's. */
303                 if (!(*((u32 *) & (bond->dev->dev_addr[0])))) {
304                         memcpy(bond->dev->dev_addr, dev->dev_addr,
305                                dev->addr_len);
306                 }
307
308                 /* Set the slave's MTU to match the bond */
309                 original_mtu = dev->mtu;
310                 res = dev_set_mtu(dev, bond->dev->mtu);
311                 if (res) {
312                         ret = res;
313                         goto out;
314                 }
315
316                 res = bond_enslave(bond->dev, dev);
317                 bond_for_each_slave(bond, slave, i)
318                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0)
319                                 slave->original_mtu = original_mtu;
320                 if (res) {
321                         ret = res;
322                 }
323                 goto out;
324         }
325
326         if (command[0] == '-') {
327                 dev = NULL;
328                 original_mtu = 0;
329                 bond_for_each_slave(bond, slave, i)
330                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
331                                 dev = slave->dev;
332                                 original_mtu = slave->original_mtu;
333                                 break;
334                         }
335                 if (dev) {
336                         printk(KERN_INFO DRV_NAME ": %s: Removing slave %s\n",
337                                 bond->dev->name, dev->name);
338                                 res = bond_release(bond->dev, dev);
339                         if (res) {
340                                 ret = res;
341                                 goto out;
342                         }
343                         /* set the slave MTU to the default */
344                         dev_set_mtu(dev, original_mtu);
345                 }
346                 else {
347                         printk(KERN_ERR DRV_NAME ": unable to remove non-existent slave %s for bond %s.\n",
348                                 ifname, bond->dev->name);
349                         ret = -ENODEV;
350                 }
351                 goto out;
352         }
353
354 err_no_cmd:
355         printk(KERN_ERR DRV_NAME ": no command found in slaves file for bond %s. Use +ifname or -ifname.\n", bond->dev->name);
356         ret = -EPERM;
357
358 out:
359         up_write(&(bonding_rwsem));
360         rtnl_unlock();
361         return ret;
362 }
363
364 static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves, bonding_store_slaves);
365
366 /*
367  * Show and set the bonding mode.  The bond interface must be down to
368  * change the mode.
369  */
370 static ssize_t bonding_show_mode(struct device *d,
371                                  struct device_attribute *attr, char *buf)
372 {
373         struct bonding *bond = to_bond(d);
374
375         return sprintf(buf, "%s %d\n",
376                         bond_mode_tbl[bond->params.mode].modename,
377                         bond->params.mode);
378 }
379
380 static ssize_t bonding_store_mode(struct device *d,
381                                   struct device_attribute *attr,
382                                   const char *buf, size_t count)
383 {
384         int new_value, ret = count;
385         struct bonding *bond = to_bond(d);
386
387         if (bond->dev->flags & IFF_UP) {
388                 printk(KERN_ERR DRV_NAME
389                        ": unable to update mode of %s because interface is up.\n",
390                        bond->dev->name);
391                 ret = -EPERM;
392                 goto out;
393         }
394
395         new_value = bond_parse_parm(buf, bond_mode_tbl);
396         if (new_value < 0)  {
397                 printk(KERN_ERR DRV_NAME
398                        ": %s: Ignoring invalid mode value %.*s.\n",
399                        bond->dev->name,
400                        (int)strlen(buf) - 1, buf);
401                 ret = -EINVAL;
402                 goto out;
403         } else {
404                 if (bond->params.mode == BOND_MODE_8023AD)
405                         bond_unset_master_3ad_flags(bond);
406
407                 if (bond->params.mode == BOND_MODE_ALB)
408                         bond_unset_master_alb_flags(bond);
409
410                 bond->params.mode = new_value;
411                 bond_set_mode_ops(bond, bond->params.mode);
412                 printk(KERN_INFO DRV_NAME ": %s: setting mode to %s (%d).\n",
413                         bond->dev->name, bond_mode_tbl[new_value].modename, new_value);
414         }
415 out:
416         return ret;
417 }
418 static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR, bonding_show_mode, bonding_store_mode);
419
420 /*
421  * Show and set the bonding transmit hash method.  The bond interface must be down to
422  * change the xmit hash policy.
423  */
424 static ssize_t bonding_show_xmit_hash(struct device *d,
425                                       struct device_attribute *attr,
426                                       char *buf)
427 {
428         struct bonding *bond = to_bond(d);
429
430         return sprintf(buf, "%s %d\n",
431                        xmit_hashtype_tbl[bond->params.xmit_policy].modename,
432                        bond->params.xmit_policy);
433 }
434
435 static ssize_t bonding_store_xmit_hash(struct device *d,
436                                        struct device_attribute *attr,
437                                        const char *buf, size_t count)
438 {
439         int new_value, ret = count;
440         struct bonding *bond = to_bond(d);
441
442         if (bond->dev->flags & IFF_UP) {
443                 printk(KERN_ERR DRV_NAME
444                        "%s: Interface is up. Unable to update xmit policy.\n",
445                        bond->dev->name);
446                 ret = -EPERM;
447                 goto out;
448         }
449
450         new_value = bond_parse_parm(buf, xmit_hashtype_tbl);
451         if (new_value < 0)  {
452                 printk(KERN_ERR DRV_NAME
453                        ": %s: Ignoring invalid xmit hash policy value %.*s.\n",
454                        bond->dev->name,
455                        (int)strlen(buf) - 1, buf);
456                 ret = -EINVAL;
457                 goto out;
458         } else {
459                 bond->params.xmit_policy = new_value;
460                 bond_set_mode_ops(bond, bond->params.mode);
461                 printk(KERN_INFO DRV_NAME ": %s: setting xmit hash policy to %s (%d).\n",
462                         bond->dev->name, xmit_hashtype_tbl[new_value].modename, new_value);
463         }
464 out:
465         return ret;
466 }
467 static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR, bonding_show_xmit_hash, bonding_store_xmit_hash);
468
469 /*
470  * Show and set arp_validate.
471  */
472 static ssize_t bonding_show_arp_validate(struct device *d,
473                                          struct device_attribute *attr,
474                                          char *buf)
475 {
476         struct bonding *bond = to_bond(d);
477
478         return sprintf(buf, "%s %d\n",
479                        arp_validate_tbl[bond->params.arp_validate].modename,
480                        bond->params.arp_validate);
481 }
482
483 static ssize_t bonding_store_arp_validate(struct device *d,
484                                           struct device_attribute *attr,
485                                           const char *buf, size_t count)
486 {
487         int new_value;
488         struct bonding *bond = to_bond(d);
489
490         new_value = bond_parse_parm(buf, arp_validate_tbl);
491         if (new_value < 0) {
492                 printk(KERN_ERR DRV_NAME
493                        ": %s: Ignoring invalid arp_validate value %s\n",
494                        bond->dev->name, buf);
495                 return -EINVAL;
496         }
497         if (new_value && (bond->params.mode != BOND_MODE_ACTIVEBACKUP)) {
498                 printk(KERN_ERR DRV_NAME
499                        ": %s: arp_validate only supported in active-backup mode.\n",
500                        bond->dev->name);
501                 return -EINVAL;
502         }
503         printk(KERN_INFO DRV_NAME ": %s: setting arp_validate to %s (%d).\n",
504                bond->dev->name, arp_validate_tbl[new_value].modename,
505                new_value);
506
507         if (!bond->params.arp_validate && new_value) {
508                 bond_register_arp(bond);
509         } else if (bond->params.arp_validate && !new_value) {
510                 bond_unregister_arp(bond);
511         }
512
513         bond->params.arp_validate = new_value;
514
515         return count;
516 }
517
518 static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate, bonding_store_arp_validate);
519
520 /*
521  * Show and store fail_over_mac.  User only allowed to change the
522  * value when there are no slaves.
523  */
524 static ssize_t bonding_show_fail_over_mac(struct device *d, struct device_attribute *attr, char *buf)
525 {
526         struct bonding *bond = to_bond(d);
527
528         return sprintf(buf, "%s %d\n",
529                        fail_over_mac_tbl[bond->params.fail_over_mac].modename,
530                        bond->params.fail_over_mac);
531 }
532
533 static ssize_t bonding_store_fail_over_mac(struct device *d, struct device_attribute *attr, const char *buf, size_t count)
534 {
535         int new_value;
536         struct bonding *bond = to_bond(d);
537
538         if (bond->slave_cnt != 0) {
539                 printk(KERN_ERR DRV_NAME
540                        ": %s: Can't alter fail_over_mac with slaves in bond.\n",
541                        bond->dev->name);
542                 return -EPERM;
543         }
544
545         new_value = bond_parse_parm(buf, fail_over_mac_tbl);
546         if (new_value < 0) {
547                 printk(KERN_ERR DRV_NAME
548                        ": %s: Ignoring invalid fail_over_mac value %s.\n",
549                        bond->dev->name, buf);
550                 return -EINVAL;
551         }
552
553         bond->params.fail_over_mac = new_value;
554         printk(KERN_INFO DRV_NAME ": %s: Setting fail_over_mac to %s (%d).\n",
555                bond->dev->name, fail_over_mac_tbl[new_value].modename,
556                new_value);
557
558         return count;
559 }
560
561 static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR, bonding_show_fail_over_mac, bonding_store_fail_over_mac);
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);
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.arp_interval)
605                 bond->dev->priv_flags |= IFF_MASTER_ARPMON;
606         if (bond->params.miimon) {
607                 printk(KERN_INFO DRV_NAME
608                        ": %s: ARP monitoring cannot be used with MII monitoring. "
609                        "%s Disabling MII monitoring.\n",
610                        bond->dev->name, bond->dev->name);
611                 bond->params.miimon = 0;
612                 if (delayed_work_pending(&bond->mii_work)) {
613                         cancel_delayed_work(&bond->mii_work);
614                         flush_workqueue(bond->wq);
615                 }
616         }
617         if (!bond->params.arp_targets[0]) {
618                 printk(KERN_INFO DRV_NAME
619                        ": %s: ARP monitoring has been set up, "
620                        "but no ARP targets have been specified.\n",
621                        bond->dev->name);
622         }
623         if (bond->dev->flags & IFF_UP) {
624                 /* If the interface is up, we may need to fire off
625                  * the ARP timer.  If the interface is down, the
626                  * timer will get fired off when the open function
627                  * is called.
628                  */
629                 if (!delayed_work_pending(&bond->arp_work)) {
630                         if (bond->params.mode == BOND_MODE_ACTIVEBACKUP)
631                                 INIT_DELAYED_WORK(&bond->arp_work,
632                                                   bond_activebackup_arp_mon);
633                         else
634                                 INIT_DELAYED_WORK(&bond->arp_work,
635                                                   bond_loadbalance_arp_mon);
636
637                         queue_delayed_work(bond->wq, &bond->arp_work, 0);
638                 }
639         }
640
641 out:
642         return ret;
643 }
644 static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR , bonding_show_arp_interval, bonding_store_arp_interval);
645
646 /*
647  * Show and set the arp targets.
648  */
649 static ssize_t bonding_show_arp_targets(struct device *d,
650                                         struct device_attribute *attr,
651                                         char *buf)
652 {
653         int i, res = 0;
654         struct bonding *bond = to_bond(d);
655
656         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
657                 if (bond->params.arp_targets[i])
658                         res += sprintf(buf + res, "%pI4 ",
659                                        &bond->params.arp_targets[i]);
660         }
661         if (res)
662                 buf[res-1] = '\n'; /* eat the leftover space */
663         return res;
664 }
665
666 static ssize_t bonding_store_arp_targets(struct device *d,
667                                          struct device_attribute *attr,
668                                          const char *buf, size_t count)
669 {
670         __be32 newtarget;
671         int i = 0, done = 0, ret = count;
672         struct bonding *bond = to_bond(d);
673         __be32 *targets;
674
675         targets = bond->params.arp_targets;
676         newtarget = in_aton(buf + 1);
677         /* look for adds */
678         if (buf[0] == '+') {
679                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
680                         printk(KERN_ERR DRV_NAME
681                                ": %s: invalid ARP target %pI4 specified for addition\n",
682                                bond->dev->name, &newtarget);
683                         ret = -EINVAL;
684                         goto out;
685                 }
686                 /* look for an empty slot to put the target in, and check for dupes */
687                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
688                         if (targets[i] == newtarget) { /* duplicate */
689                                 printk(KERN_ERR DRV_NAME
690                                        ": %s: ARP target %pI4 is already present\n",
691                                        bond->dev->name, &newtarget);
692                                 if (done)
693                                         targets[i] = 0;
694                                 ret = -EINVAL;
695                                 goto out;
696                         }
697                         if (targets[i] == 0 && !done) {
698                                 printk(KERN_INFO DRV_NAME
699                                        ": %s: adding ARP target %pI4.\n",
700                                        bond->dev->name, &newtarget);
701                                 done = 1;
702                                 targets[i] = newtarget;
703                         }
704                 }
705                 if (!done) {
706                         printk(KERN_ERR DRV_NAME
707                                ": %s: ARP target table is full!\n",
708                                bond->dev->name);
709                         ret = -EINVAL;
710                         goto out;
711                 }
712
713         }
714         else if (buf[0] == '-') {
715                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
716                         printk(KERN_ERR DRV_NAME
717                                ": %s: invalid ARP target %pI4 specified for removal\n",
718                                bond->dev->name, &newtarget);
719                         ret = -EINVAL;
720                         goto out;
721                 }
722
723                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
724                         if (targets[i] == newtarget) {
725                                 printk(KERN_INFO DRV_NAME
726                                        ": %s: removing ARP target %pI4.\n",
727                                        bond->dev->name, &newtarget);
728                                 targets[i] = 0;
729                                 done = 1;
730                         }
731                 }
732                 if (!done) {
733                         printk(KERN_INFO DRV_NAME
734                                ": %s: unable to remove nonexistent ARP target %pI4.\n",
735                                bond->dev->name, &newtarget);
736                         ret = -EINVAL;
737                         goto out;
738                 }
739         }
740         else {
741                 printk(KERN_ERR DRV_NAME ": no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
742                         bond->dev->name);
743                 ret = -EPERM;
744                 goto out;
745         }
746
747 out:
748         return ret;
749 }
750 static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
751
752 /*
753  * Show and set the up and down delays.  These must be multiples of the
754  * MII monitoring value, and are stored internally as the multiplier.
755  * Thus, we must translate to MS for the real world.
756  */
757 static ssize_t bonding_show_downdelay(struct device *d,
758                                       struct device_attribute *attr,
759                                       char *buf)
760 {
761         struct bonding *bond = to_bond(d);
762
763         return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
764 }
765
766 static ssize_t bonding_store_downdelay(struct device *d,
767                                        struct device_attribute *attr,
768                                        const char *buf, size_t count)
769 {
770         int new_value, ret = count;
771         struct bonding *bond = to_bond(d);
772
773         if (!(bond->params.miimon)) {
774                 printk(KERN_ERR DRV_NAME
775                        ": %s: Unable to set down delay as MII monitoring is disabled\n",
776                        bond->dev->name);
777                 ret = -EPERM;
778                 goto out;
779         }
780
781         if (sscanf(buf, "%d", &new_value) != 1) {
782                 printk(KERN_ERR DRV_NAME
783                        ": %s: no down delay value specified.\n",
784                        bond->dev->name);
785                 ret = -EINVAL;
786                 goto out;
787         }
788         if (new_value < 0) {
789                 printk(KERN_ERR DRV_NAME
790                        ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
791                        bond->dev->name, new_value, 1, INT_MAX);
792                 ret = -EINVAL;
793                 goto out;
794         } else {
795                 if ((new_value % bond->params.miimon) != 0) {
796                         printk(KERN_WARNING DRV_NAME
797                                ": %s: Warning: down delay (%d) is not a multiple "
798                                "of miimon (%d), delay rounded to %d ms\n",
799                                bond->dev->name, new_value, bond->params.miimon,
800                                (new_value / bond->params.miimon) *
801                                bond->params.miimon);
802                 }
803                 bond->params.downdelay = new_value / bond->params.miimon;
804                 printk(KERN_INFO DRV_NAME ": %s: Setting down delay to %d.\n",
805                        bond->dev->name, bond->params.downdelay * bond->params.miimon);
806
807         }
808
809 out:
810         return ret;
811 }
812 static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR , bonding_show_downdelay, bonding_store_downdelay);
813
814 static ssize_t bonding_show_updelay(struct device *d,
815                                     struct device_attribute *attr,
816                                     char *buf)
817 {
818         struct bonding *bond = to_bond(d);
819
820         return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
821
822 }
823
824 static ssize_t bonding_store_updelay(struct device *d,
825                                      struct device_attribute *attr,
826                                      const char *buf, size_t count)
827 {
828         int new_value, ret = count;
829         struct bonding *bond = to_bond(d);
830
831         if (!(bond->params.miimon)) {
832                 printk(KERN_ERR DRV_NAME
833                        ": %s: Unable to set up delay as MII monitoring is disabled\n",
834                        bond->dev->name);
835                 ret = -EPERM;
836                 goto out;
837         }
838
839         if (sscanf(buf, "%d", &new_value) != 1) {
840                 printk(KERN_ERR DRV_NAME
841                        ": %s: no up delay value specified.\n",
842                        bond->dev->name);
843                 ret = -EINVAL;
844                 goto out;
845         }
846         if (new_value < 0) {
847                 printk(KERN_ERR DRV_NAME
848                        ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
849                        bond->dev->name, new_value, 1, INT_MAX);
850                 ret = -EINVAL;
851                 goto out;
852         } else {
853                 if ((new_value % bond->params.miimon) != 0) {
854                         printk(KERN_WARNING DRV_NAME
855                                ": %s: Warning: up delay (%d) is not a multiple "
856                                "of miimon (%d), updelay rounded to %d ms\n",
857                                bond->dev->name, new_value, bond->params.miimon,
858                                (new_value / bond->params.miimon) *
859                                bond->params.miimon);
860                 }
861                 bond->params.updelay = new_value / bond->params.miimon;
862                 printk(KERN_INFO DRV_NAME ": %s: Setting up delay to %d.\n",
863                        bond->dev->name, bond->params.updelay * bond->params.miimon);
864
865         }
866
867 out:
868         return ret;
869 }
870 static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR , bonding_show_updelay, bonding_store_updelay);
871
872 /*
873  * Show and set the LACP interval.  Interface must be down, and the mode
874  * must be set to 802.3ad mode.
875  */
876 static ssize_t bonding_show_lacp(struct device *d,
877                                  struct device_attribute *attr,
878                                  char *buf)
879 {
880         struct bonding *bond = to_bond(d);
881
882         return sprintf(buf, "%s %d\n",
883                 bond_lacp_tbl[bond->params.lacp_fast].modename,
884                 bond->params.lacp_fast);
885 }
886
887 static ssize_t bonding_store_lacp(struct device *d,
888                                   struct device_attribute *attr,
889                                   const char *buf, size_t count)
890 {
891         int new_value, ret = count;
892         struct bonding *bond = to_bond(d);
893
894         if (bond->dev->flags & IFF_UP) {
895                 printk(KERN_ERR DRV_NAME
896                        ": %s: Unable to update LACP rate because interface is up.\n",
897                        bond->dev->name);
898                 ret = -EPERM;
899                 goto out;
900         }
901
902         if (bond->params.mode != BOND_MODE_8023AD) {
903                 printk(KERN_ERR DRV_NAME
904                        ": %s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
905                        bond->dev->name);
906                 ret = -EPERM;
907                 goto out;
908         }
909
910         new_value = bond_parse_parm(buf, bond_lacp_tbl);
911
912         if ((new_value == 1) || (new_value == 0)) {
913                 bond->params.lacp_fast = new_value;
914                 printk(KERN_INFO DRV_NAME
915                        ": %s: Setting LACP rate to %s (%d).\n",
916                        bond->dev->name, bond_lacp_tbl[new_value].modename, new_value);
917         } else {
918                 printk(KERN_ERR DRV_NAME
919                        ": %s: Ignoring invalid LACP rate value %.*s.\n",
920                         bond->dev->name, (int)strlen(buf) - 1, buf);
921                 ret = -EINVAL;
922         }
923 out:
924         return ret;
925 }
926 static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR, bonding_show_lacp, bonding_store_lacp);
927
928 static ssize_t bonding_show_ad_select(struct device *d,
929                                       struct device_attribute *attr,
930                                       char *buf)
931 {
932         struct bonding *bond = to_bond(d);
933
934         return sprintf(buf, "%s %d\n",
935                 ad_select_tbl[bond->params.ad_select].modename,
936                 bond->params.ad_select);
937 }
938
939
940 static ssize_t bonding_store_ad_select(struct device *d,
941                                        struct device_attribute *attr,
942                                        const char *buf, size_t count)
943 {
944         int new_value, ret = count;
945         struct bonding *bond = to_bond(d);
946
947         if (bond->dev->flags & IFF_UP) {
948                 printk(KERN_ERR DRV_NAME
949                        ": %s: Unable to update ad_select because interface "
950                        "is up.\n", bond->dev->name);
951                 ret = -EPERM;
952                 goto out;
953         }
954
955         new_value = bond_parse_parm(buf, ad_select_tbl);
956
957         if (new_value != -1) {
958                 bond->params.ad_select = new_value;
959                 printk(KERN_INFO DRV_NAME
960                        ": %s: Setting ad_select to %s (%d).\n",
961                        bond->dev->name, ad_select_tbl[new_value].modename,
962                        new_value);
963         } else {
964                 printk(KERN_ERR DRV_NAME
965                        ": %s: Ignoring invalid ad_select value %.*s.\n",
966                        bond->dev->name, (int)strlen(buf) - 1, buf);
967                 ret = -EINVAL;
968         }
969 out:
970         return ret;
971 }
972
973 static DEVICE_ATTR(ad_select, S_IRUGO | S_IWUSR, bonding_show_ad_select, bonding_store_ad_select);
974
975 /*
976  * Show and set the number of grat ARP to send after a failover event.
977  */
978 static ssize_t bonding_show_n_grat_arp(struct device *d,
979                                    struct device_attribute *attr,
980                                    char *buf)
981 {
982         struct bonding *bond = to_bond(d);
983
984         return sprintf(buf, "%d\n", bond->params.num_grat_arp);
985 }
986
987 static ssize_t bonding_store_n_grat_arp(struct device *d,
988                                     struct device_attribute *attr,
989                                     const char *buf, size_t count)
990 {
991         int new_value, ret = count;
992         struct bonding *bond = to_bond(d);
993
994         if (sscanf(buf, "%d", &new_value) != 1) {
995                 printk(KERN_ERR DRV_NAME
996                        ": %s: no num_grat_arp value specified.\n",
997                        bond->dev->name);
998                 ret = -EINVAL;
999                 goto out;
1000         }
1001         if (new_value < 0 || new_value > 255) {
1002                 printk(KERN_ERR DRV_NAME
1003                        ": %s: Invalid num_grat_arp value %d not in range 0-255; rejected.\n",
1004                        bond->dev->name, new_value);
1005                 ret = -EINVAL;
1006                 goto out;
1007         } else {
1008                 bond->params.num_grat_arp = new_value;
1009         }
1010 out:
1011         return ret;
1012 }
1013 static DEVICE_ATTR(num_grat_arp, S_IRUGO | S_IWUSR, bonding_show_n_grat_arp, bonding_store_n_grat_arp);
1014
1015 /*
1016  * Show and set the number of unsolicted NA's to send after a failover event.
1017  */
1018 static ssize_t bonding_show_n_unsol_na(struct device *d,
1019                                        struct device_attribute *attr,
1020                                        char *buf)
1021 {
1022         struct bonding *bond = to_bond(d);
1023
1024         return sprintf(buf, "%d\n", bond->params.num_unsol_na);
1025 }
1026
1027 static ssize_t bonding_store_n_unsol_na(struct device *d,
1028                                         struct device_attribute *attr,
1029                                         const char *buf, size_t count)
1030 {
1031         int new_value, ret = count;
1032         struct bonding *bond = to_bond(d);
1033
1034         if (sscanf(buf, "%d", &new_value) != 1) {
1035                 printk(KERN_ERR DRV_NAME
1036                        ": %s: no num_unsol_na value specified.\n",
1037                        bond->dev->name);
1038                 ret = -EINVAL;
1039                 goto out;
1040         }
1041         if (new_value < 0 || new_value > 255) {
1042                 printk(KERN_ERR DRV_NAME
1043                        ": %s: Invalid num_unsol_na value %d not in range 0-255; rejected.\n",
1044                        bond->dev->name, new_value);
1045                 ret = -EINVAL;
1046                 goto out;
1047         } else {
1048                 bond->params.num_unsol_na = new_value;
1049         }
1050 out:
1051         return ret;
1052 }
1053 static DEVICE_ATTR(num_unsol_na, S_IRUGO | S_IWUSR, bonding_show_n_unsol_na, bonding_store_n_unsol_na);
1054
1055 /*
1056  * Show and set the MII monitor interval.  There are two tricky bits
1057  * here.  First, if MII monitoring is activated, then we must disable
1058  * ARP monitoring.  Second, if the timer isn't running, we must
1059  * start it.
1060  */
1061 static ssize_t bonding_show_miimon(struct device *d,
1062                                    struct device_attribute *attr,
1063                                    char *buf)
1064 {
1065         struct bonding *bond = to_bond(d);
1066
1067         return sprintf(buf, "%d\n", bond->params.miimon);
1068 }
1069
1070 static ssize_t bonding_store_miimon(struct device *d,
1071                                     struct device_attribute *attr,
1072                                     const char *buf, size_t count)
1073 {
1074         int new_value, ret = count;
1075         struct bonding *bond = to_bond(d);
1076
1077         if (sscanf(buf, "%d", &new_value) != 1) {
1078                 printk(KERN_ERR DRV_NAME
1079                        ": %s: no miimon value specified.\n",
1080                        bond->dev->name);
1081                 ret = -EINVAL;
1082                 goto out;
1083         }
1084         if (new_value < 0) {
1085                 printk(KERN_ERR DRV_NAME
1086                        ": %s: Invalid miimon value %d not in range %d-%d; rejected.\n",
1087                        bond->dev->name, new_value, 1, INT_MAX);
1088                 ret = -EINVAL;
1089                 goto out;
1090         } else {
1091                 printk(KERN_INFO DRV_NAME
1092                        ": %s: Setting MII monitoring interval to %d.\n",
1093                        bond->dev->name, new_value);
1094                 bond->params.miimon = new_value;
1095                 if(bond->params.updelay)
1096                         printk(KERN_INFO DRV_NAME
1097                               ": %s: Note: Updating updelay (to %d) "
1098                               "since it is a multiple of the miimon value.\n",
1099                               bond->dev->name,
1100                               bond->params.updelay * bond->params.miimon);
1101                 if(bond->params.downdelay)
1102                         printk(KERN_INFO DRV_NAME
1103                               ": %s: Note: Updating downdelay (to %d) "
1104                               "since it is a multiple of the miimon value.\n",
1105                               bond->dev->name,
1106                               bond->params.downdelay * bond->params.miimon);
1107                 if (bond->params.arp_interval) {
1108                         printk(KERN_INFO DRV_NAME
1109                                ": %s: MII monitoring cannot be used with "
1110                                "ARP monitoring. Disabling ARP monitoring...\n",
1111                                bond->dev->name);
1112                         bond->params.arp_interval = 0;
1113                         bond->dev->priv_flags &= ~IFF_MASTER_ARPMON;
1114                         if (bond->params.arp_validate) {
1115                                 bond_unregister_arp(bond);
1116                                 bond->params.arp_validate =
1117                                         BOND_ARP_VALIDATE_NONE;
1118                         }
1119                         if (delayed_work_pending(&bond->arp_work)) {
1120                                 cancel_delayed_work(&bond->arp_work);
1121                                 flush_workqueue(bond->wq);
1122                         }
1123                 }
1124
1125                 if (bond->dev->flags & IFF_UP) {
1126                         /* If the interface is up, we may need to fire off
1127                          * the MII timer. If the interface is down, the
1128                          * timer will get fired off when the open function
1129                          * is called.
1130                          */
1131                         if (!delayed_work_pending(&bond->mii_work)) {
1132                                 INIT_DELAYED_WORK(&bond->mii_work,
1133                                                   bond_mii_monitor);
1134                                 queue_delayed_work(bond->wq,
1135                                                    &bond->mii_work, 0);
1136                         }
1137                 }
1138         }
1139 out:
1140         return ret;
1141 }
1142 static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR, bonding_show_miimon, bonding_store_miimon);
1143
1144 /*
1145  * Show and set the primary slave.  The store function is much
1146  * simpler than bonding_store_slaves function because it only needs to
1147  * handle one interface name.
1148  * The bond must be a mode that supports a primary for this be
1149  * set.
1150  */
1151 static ssize_t bonding_show_primary(struct device *d,
1152                                     struct device_attribute *attr,
1153                                     char *buf)
1154 {
1155         int count = 0;
1156         struct bonding *bond = to_bond(d);
1157
1158         if (bond->primary_slave)
1159                 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);
1160
1161         return count;
1162 }
1163
1164 static ssize_t bonding_store_primary(struct device *d,
1165                                      struct device_attribute *attr,
1166                                      const char *buf, size_t count)
1167 {
1168         int i;
1169         struct slave *slave;
1170         struct bonding *bond = to_bond(d);
1171
1172         rtnl_lock();
1173         read_lock(&bond->lock);
1174         write_lock_bh(&bond->curr_slave_lock);
1175
1176         if (!USES_PRIMARY(bond->params.mode)) {
1177                 printk(KERN_INFO DRV_NAME
1178                        ": %s: Unable to set primary slave; %s is in mode %d\n",
1179                        bond->dev->name, bond->dev->name, bond->params.mode);
1180         } else {
1181                 bond_for_each_slave(bond, slave, i) {
1182                         if (strnicmp
1183                             (slave->dev->name, buf,
1184                              strlen(slave->dev->name)) == 0) {
1185                                 printk(KERN_INFO DRV_NAME
1186                                        ": %s: Setting %s as primary slave.\n",
1187                                        bond->dev->name, slave->dev->name);
1188                                 bond->primary_slave = slave;
1189                                 bond_select_active_slave(bond);
1190                                 goto out;
1191                         }
1192                 }
1193
1194                 /* if we got here, then we didn't match the name of any slave */
1195
1196                 if (strlen(buf) == 0 || buf[0] == '\n') {
1197                         printk(KERN_INFO DRV_NAME
1198                                ": %s: Setting primary slave to None.\n",
1199                                bond->dev->name);
1200                         bond->primary_slave = NULL;
1201                                 bond_select_active_slave(bond);
1202                 } else {
1203                         printk(KERN_INFO DRV_NAME
1204                                ": %s: Unable to set %.*s as primary slave as it is not a slave.\n",
1205                                bond->dev->name, (int)strlen(buf) - 1, buf);
1206                 }
1207         }
1208 out:
1209         write_unlock_bh(&bond->curr_slave_lock);
1210         read_unlock(&bond->lock);
1211         rtnl_unlock();
1212
1213         return count;
1214 }
1215 static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR, bonding_show_primary, bonding_store_primary);
1216
1217 /*
1218  * Show and set the use_carrier flag.
1219  */
1220 static ssize_t bonding_show_carrier(struct device *d,
1221                                     struct device_attribute *attr,
1222                                     char *buf)
1223 {
1224         struct bonding *bond = to_bond(d);
1225
1226         return sprintf(buf, "%d\n", bond->params.use_carrier);
1227 }
1228
1229 static ssize_t bonding_store_carrier(struct device *d,
1230                                      struct device_attribute *attr,
1231                                      const char *buf, size_t count)
1232 {
1233         int new_value, ret = count;
1234         struct bonding *bond = to_bond(d);
1235
1236
1237         if (sscanf(buf, "%d", &new_value) != 1) {
1238                 printk(KERN_ERR DRV_NAME
1239                        ": %s: no use_carrier value specified.\n",
1240                        bond->dev->name);
1241                 ret = -EINVAL;
1242                 goto out;
1243         }
1244         if ((new_value == 0) || (new_value == 1)) {
1245                 bond->params.use_carrier = new_value;
1246                 printk(KERN_INFO DRV_NAME ": %s: Setting use_carrier to %d.\n",
1247                        bond->dev->name, new_value);
1248         } else {
1249                 printk(KERN_INFO DRV_NAME
1250                        ": %s: Ignoring invalid use_carrier value %d.\n",
1251                        bond->dev->name, new_value);
1252         }
1253 out:
1254         return count;
1255 }
1256 static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR, bonding_show_carrier, bonding_store_carrier);
1257
1258
1259 /*
1260  * Show and set currently active_slave.
1261  */
1262 static ssize_t bonding_show_active_slave(struct device *d,
1263                                          struct device_attribute *attr,
1264                                          char *buf)
1265 {
1266         struct slave *curr;
1267         struct bonding *bond = to_bond(d);
1268         int count = 0;
1269
1270         read_lock(&bond->curr_slave_lock);
1271         curr = bond->curr_active_slave;
1272         read_unlock(&bond->curr_slave_lock);
1273
1274         if (USES_PRIMARY(bond->params.mode) && curr)
1275                 count = sprintf(buf, "%s\n", curr->dev->name);
1276         return count;
1277 }
1278
1279 static ssize_t bonding_store_active_slave(struct device *d,
1280                                           struct device_attribute *attr,
1281                                           const char *buf, size_t count)
1282 {
1283         int i;
1284         struct slave *slave;
1285         struct slave *old_active = NULL;
1286         struct slave *new_active = NULL;
1287         struct bonding *bond = to_bond(d);
1288
1289         rtnl_lock();
1290         read_lock(&bond->lock);
1291         write_lock_bh(&bond->curr_slave_lock);
1292
1293         if (!USES_PRIMARY(bond->params.mode)) {
1294                 printk(KERN_INFO DRV_NAME
1295                        ": %s: Unable to change active slave; %s is in mode %d\n",
1296                        bond->dev->name, bond->dev->name, bond->params.mode);
1297         } else {
1298                 bond_for_each_slave(bond, slave, i) {
1299                         if (strnicmp
1300                             (slave->dev->name, buf,
1301                              strlen(slave->dev->name)) == 0) {
1302                                 old_active = bond->curr_active_slave;
1303                                 new_active = slave;
1304                                 if (new_active == old_active) {
1305                                         /* do nothing */
1306                                         printk(KERN_INFO DRV_NAME
1307                                                ": %s: %s is already the current active slave.\n",
1308                                                bond->dev->name, slave->dev->name);
1309                                         goto out;
1310                                 }
1311                                 else {
1312                                         if ((new_active) &&
1313                                             (old_active) &&
1314                                             (new_active->link == BOND_LINK_UP) &&
1315                                             IS_UP(new_active->dev)) {
1316                                                 printk(KERN_INFO DRV_NAME
1317                                                       ": %s: Setting %s as active slave.\n",
1318                                                       bond->dev->name, slave->dev->name);
1319                                                 bond_change_active_slave(bond, new_active);
1320                                         }
1321                                         else {
1322                                                 printk(KERN_INFO DRV_NAME
1323                                                       ": %s: Could not set %s as active slave; "
1324                                                       "either %s is down or the link is down.\n",
1325                                                       bond->dev->name, slave->dev->name,
1326                                                       slave->dev->name);
1327                                         }
1328                                         goto out;
1329                                 }
1330                         }
1331                 }
1332
1333                 /* if we got here, then we didn't match the name of any slave */
1334
1335                 if (strlen(buf) == 0 || buf[0] == '\n') {
1336                         printk(KERN_INFO DRV_NAME
1337                                ": %s: Setting active slave to None.\n",
1338                                bond->dev->name);
1339                         bond->primary_slave = NULL;
1340                                 bond_select_active_slave(bond);
1341                 } else {
1342                         printk(KERN_INFO DRV_NAME
1343                                ": %s: Unable to set %.*s as active slave as it is not a slave.\n",
1344                                bond->dev->name, (int)strlen(buf) - 1, buf);
1345                 }
1346         }
1347 out:
1348         write_unlock_bh(&bond->curr_slave_lock);
1349         read_unlock(&bond->lock);
1350         rtnl_unlock();
1351
1352         return count;
1353
1354 }
1355 static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR, bonding_show_active_slave, bonding_store_active_slave);
1356
1357
1358 /*
1359  * Show link status of the bond interface.
1360  */
1361 static ssize_t bonding_show_mii_status(struct device *d,
1362                                        struct device_attribute *attr,
1363                                        char *buf)
1364 {
1365         struct slave *curr;
1366         struct bonding *bond = to_bond(d);
1367
1368         read_lock(&bond->curr_slave_lock);
1369         curr = bond->curr_active_slave;
1370         read_unlock(&bond->curr_slave_lock);
1371
1372         return sprintf(buf, "%s\n", (curr) ? "up" : "down");
1373 }
1374 static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1375
1376
1377 /*
1378  * Show current 802.3ad aggregator ID.
1379  */
1380 static ssize_t bonding_show_ad_aggregator(struct device *d,
1381                                           struct device_attribute *attr,
1382                                           char *buf)
1383 {
1384         int count = 0;
1385         struct bonding *bond = to_bond(d);
1386
1387         if (bond->params.mode == BOND_MODE_8023AD) {
1388                 struct ad_info ad_info;
1389                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.aggregator_id);
1390         }
1391
1392         return count;
1393 }
1394 static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1395
1396
1397 /*
1398  * Show number of active 802.3ad ports.
1399  */
1400 static ssize_t bonding_show_ad_num_ports(struct device *d,
1401                                          struct device_attribute *attr,
1402                                          char *buf)
1403 {
1404         int count = 0;
1405         struct bonding *bond = to_bond(d);
1406
1407         if (bond->params.mode == BOND_MODE_8023AD) {
1408                 struct ad_info ad_info;
1409                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0: ad_info.ports);
1410         }
1411
1412         return count;
1413 }
1414 static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1415
1416
1417 /*
1418  * Show current 802.3ad actor key.
1419  */
1420 static ssize_t bonding_show_ad_actor_key(struct device *d,
1421                                          struct device_attribute *attr,
1422                                          char *buf)
1423 {
1424         int count = 0;
1425         struct bonding *bond = to_bond(d);
1426
1427         if (bond->params.mode == BOND_MODE_8023AD) {
1428                 struct ad_info ad_info;
1429                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.actor_key);
1430         }
1431
1432         return count;
1433 }
1434 static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1435
1436
1437 /*
1438  * Show current 802.3ad partner key.
1439  */
1440 static ssize_t bonding_show_ad_partner_key(struct device *d,
1441                                            struct device_attribute *attr,
1442                                            char *buf)
1443 {
1444         int count = 0;
1445         struct bonding *bond = to_bond(d);
1446
1447         if (bond->params.mode == BOND_MODE_8023AD) {
1448                 struct ad_info ad_info;
1449                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.partner_key);
1450         }
1451
1452         return count;
1453 }
1454 static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1455
1456
1457 /*
1458  * Show current 802.3ad partner mac.
1459  */
1460 static ssize_t bonding_show_ad_partner_mac(struct device *d,
1461                                            struct device_attribute *attr,
1462                                            char *buf)
1463 {
1464         int count = 0;
1465         struct bonding *bond = to_bond(d);
1466
1467         if (bond->params.mode == BOND_MODE_8023AD) {
1468                 struct ad_info ad_info;
1469                 if (!bond_3ad_get_active_agg_info(bond, &ad_info)) {
1470                         count = sprintf(buf, "%pM\n", ad_info.partner_system);
1471                 }
1472         }
1473
1474         return count;
1475 }
1476 static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1477
1478
1479
1480 static struct attribute *per_bond_attrs[] = {
1481         &dev_attr_slaves.attr,
1482         &dev_attr_mode.attr,
1483         &dev_attr_fail_over_mac.attr,
1484         &dev_attr_arp_validate.attr,
1485         &dev_attr_arp_interval.attr,
1486         &dev_attr_arp_ip_target.attr,
1487         &dev_attr_downdelay.attr,
1488         &dev_attr_updelay.attr,
1489         &dev_attr_lacp_rate.attr,
1490         &dev_attr_ad_select.attr,
1491         &dev_attr_xmit_hash_policy.attr,
1492         &dev_attr_num_grat_arp.attr,
1493         &dev_attr_num_unsol_na.attr,
1494         &dev_attr_miimon.attr,
1495         &dev_attr_primary.attr,
1496         &dev_attr_use_carrier.attr,
1497         &dev_attr_active_slave.attr,
1498         &dev_attr_mii_status.attr,
1499         &dev_attr_ad_aggregator.attr,
1500         &dev_attr_ad_num_ports.attr,
1501         &dev_attr_ad_actor_key.attr,
1502         &dev_attr_ad_partner_key.attr,
1503         &dev_attr_ad_partner_mac.attr,
1504         NULL,
1505 };
1506
1507 static struct attribute_group bonding_group = {
1508         .name = "bonding",
1509         .attrs = per_bond_attrs,
1510 };
1511
1512 /*
1513  * Initialize sysfs.  This sets up the bonding_masters file in
1514  * /sys/class/net.
1515  */
1516 int bond_create_sysfs(void)
1517 {
1518         int ret;
1519
1520         ret = netdev_class_create_file(&class_attr_bonding_masters);
1521         /*
1522          * Permit multiple loads of the module by ignoring failures to
1523          * create the bonding_masters sysfs file.  Bonding devices
1524          * created by second or subsequent loads of the module will
1525          * not be listed in, or controllable by, bonding_masters, but
1526          * will have the usual "bonding" sysfs directory.
1527          *
1528          * This is done to preserve backwards compatibility for
1529          * initscripts/sysconfig, which load bonding multiple times to
1530          * configure multiple bonding devices.
1531          */
1532         if (ret == -EEXIST) {
1533                 /* Is someone being kinky and naming a device bonding_master? */
1534                 if (__dev_get_by_name(&init_net,
1535                                       class_attr_bonding_masters.attr.name))
1536                         printk(KERN_ERR
1537                                "network device named %s already exists in sysfs",
1538                                class_attr_bonding_masters.attr.name);
1539         }
1540
1541         return ret;
1542
1543 }
1544
1545 /*
1546  * Remove /sys/class/net/bonding_masters.
1547  */
1548 void bond_destroy_sysfs(void)
1549 {
1550         netdev_class_remove_file(&class_attr_bonding_masters);
1551 }
1552
1553 /*
1554  * Initialize sysfs for each bond.  This sets up and registers
1555  * the 'bondctl' directory for each individual bond under /sys/class/net.
1556  */
1557 int bond_create_sysfs_entry(struct bonding *bond)
1558 {
1559         struct net_device *dev = bond->dev;
1560         int err;
1561
1562         err = sysfs_create_group(&(dev->dev.kobj), &bonding_group);
1563         if (err) {
1564                 printk(KERN_EMERG "eek! didn't create group!\n");
1565         }
1566
1567         if (expected_refcount < 1)
1568                 expected_refcount = atomic_read(&bond->dev->dev.kobj.kref.refcount);
1569
1570         return err;
1571 }
1572 /*
1573  * Remove sysfs entries for each bond.
1574  */
1575 void bond_destroy_sysfs_entry(struct bonding *bond)
1576 {
1577         struct net_device *dev = bond->dev;
1578
1579         sysfs_remove_group(&(dev->dev.kobj), &bonding_group);
1580 }
1581