bonding: fix lock ordering for rtnl and bonding_rwsem
[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 subsystem 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 *buf)
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(buf + res, "++more++ ");
90                         break;
91                 }
92                 res += sprintf(buf + res, "%s ", bond->dev->name);
93         }
94         if (res)
95                 buf[res-1] = '\n'; /* eat the leftover space */
96         up_read(&(bonding_rwsem));
97         return res;
98 }
99
100 /*
101  * "store" function for the bond_masters attribute.  This is what
102  * creates and deletes entire bonds.
103  *
104  * The class parameter is ignored.
105  *
106  */
107
108 static ssize_t bonding_store_bonds(struct class *cls, const char *buffer, size_t count)
109 {
110         char command[IFNAMSIZ + 1] = {0, };
111         char *ifname;
112         int rv, res = count;
113         struct bonding *bond;
114         struct bonding *nxt;
115
116         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
117         ifname = command + 1;
118         if ((strlen(command) <= 1) ||
119             !dev_valid_name(ifname))
120                 goto err_no_cmd;
121
122         if (command[0] == '+') {
123                 printk(KERN_INFO DRV_NAME
124                         ": %s is being created...\n", ifname);
125                 rv = bond_create(ifname, &bonding_defaults, &bond);
126                 if (rv) {
127                         printk(KERN_INFO DRV_NAME ": Bond creation failed.\n");
128                         res = rv;
129                 }
130                 goto out;
131         }
132
133         if (command[0] == '-') {
134                 rtnl_lock();
135                 down_write(&bonding_rwsem);
136
137                 list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list)
138                         if (strnicmp(bond->dev->name, ifname, IFNAMSIZ) == 0) {
139                                 /* check the ref count on the bond's kobject.
140                                  * If it's > expected, then there's a file open,
141                                  * and we have to fail.
142                                  */
143                                 if (atomic_read(&bond->dev->dev.kobj.kref.refcount)
144                                                         > expected_refcount){
145                                         printk(KERN_INFO DRV_NAME
146                                                 ": Unable remove bond %s due to open references.\n",
147                                                 ifname);
148                                         res = -EPERM;
149                                         goto out;
150                                 }
151                                 printk(KERN_INFO DRV_NAME
152                                         ": %s is being deleted...\n",
153                                         bond->dev->name);
154                                 bond_destroy(bond);
155                                 up_write(&bonding_rwsem);
156                                 rtnl_unlock();
157                                 goto out;
158                         }
159
160                 printk(KERN_ERR DRV_NAME
161                         ": unable to delete non-existent bond %s\n", ifname);
162                 res = -ENODEV;
163                 up_write(&bonding_rwsem);
164                 rtnl_unlock();
165                 goto out;
166         }
167
168 err_no_cmd:
169         printk(KERN_ERR DRV_NAME
170                 ": no command found in bonding_masters. Use +ifname or -ifname.\n");
171         res = -EPERM;
172
173         /* Always return either count or an error.  If you return 0, you'll
174          * get called forever, which is bad.
175          */
176 out:
177         return res;
178 }
179 /* class attribute for bond_masters file.  This ends up in /sys/class/net */
180 static CLASS_ATTR(bonding_masters,  S_IWUSR | S_IRUGO,
181                   bonding_show_bonds, bonding_store_bonds);
182
183 int bond_create_slave_symlinks(struct net_device *master, struct net_device *slave)
184 {
185         char linkname[IFNAMSIZ+7];
186         int ret = 0;
187
188         /* first, create a link from the slave back to the master */
189         ret = sysfs_create_link(&(slave->dev.kobj), &(master->dev.kobj),
190                                 "master");
191         if (ret)
192                 return ret;
193         /* next, create a link from the master to the slave */
194         sprintf(linkname,"slave_%s",slave->name);
195         ret = sysfs_create_link(&(master->dev.kobj), &(slave->dev.kobj),
196                                 linkname);
197         return ret;
198
199 }
200
201 void bond_destroy_slave_symlinks(struct net_device *master, struct net_device *slave)
202 {
203         char linkname[IFNAMSIZ+7];
204
205         sysfs_remove_link(&(slave->dev.kobj), "master");
206         sprintf(linkname,"slave_%s",slave->name);
207         sysfs_remove_link(&(master->dev.kobj), linkname);
208 }
209
210
211 /*
212  * Show the slaves in the current bond.
213  */
214 static ssize_t bonding_show_slaves(struct device *d,
215                                    struct device_attribute *attr, char *buf)
216 {
217         struct slave *slave;
218         int i, res = 0;
219         struct bonding *bond = to_bond(d);
220
221         read_lock(&bond->lock);
222         bond_for_each_slave(bond, slave, i) {
223                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
224                         /* not enough space for another interface name */
225                         if ((PAGE_SIZE - res) > 10)
226                                 res = PAGE_SIZE - 10;
227                         res += sprintf(buf + res, "++more++ ");
228                         break;
229                 }
230                 res += sprintf(buf + res, "%s ", slave->dev->name);
231         }
232         read_unlock(&bond->lock);
233         if (res)
234                 buf[res-1] = '\n'; /* eat the leftover space */
235         return res;
236 }
237
238 /*
239  * Set the slaves in the current bond.  The bond interface must be
240  * up for this to succeed.
241  * This function is largely the same flow as bonding_update_bonds().
242  */
243 static ssize_t bonding_store_slaves(struct device *d,
244                                     struct device_attribute *attr,
245                                     const char *buffer, size_t count)
246 {
247         char command[IFNAMSIZ + 1] = { 0, };
248         char *ifname;
249         int i, res, found, ret = count;
250         u32 original_mtu;
251         struct slave *slave;
252         struct net_device *dev = NULL;
253         struct bonding *bond = to_bond(d);
254
255         /* Quick sanity check -- is the bond interface up? */
256         if (!(bond->dev->flags & IFF_UP)) {
257                 printk(KERN_WARNING DRV_NAME
258                        ": %s: doing slave updates when interface is down.\n",
259                        bond->dev->name);
260         }
261
262         /* Note:  We can't hold bond->lock here, as bond_create grabs it. */
263
264         rtnl_lock();
265         down_write(&(bonding_rwsem));
266
267         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
268         ifname = command + 1;
269         if ((strlen(command) <= 1) ||
270             !dev_valid_name(ifname))
271                 goto err_no_cmd;
272
273         if (command[0] == '+') {
274
275                 /* Got a slave name in ifname.  Is it already in the list? */
276                 found = 0;
277                 read_lock(&bond->lock);
278                 bond_for_each_slave(bond, slave, i)
279                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
280                                 printk(KERN_ERR DRV_NAME
281                                        ": %s: Interface %s is already enslaved!\n",
282                                        bond->dev->name, ifname);
283                                 ret = -EPERM;
284                                 read_unlock(&bond->lock);
285                                 goto out;
286                         }
287
288                 read_unlock(&bond->lock);
289                 printk(KERN_INFO DRV_NAME ": %s: Adding slave %s.\n",
290                        bond->dev->name, ifname);
291                 dev = dev_get_by_name(&init_net, ifname);
292                 if (!dev) {
293                         printk(KERN_INFO DRV_NAME
294                                ": %s: Interface %s does not exist!\n",
295                                bond->dev->name, ifname);
296                         ret = -EPERM;
297                         goto out;
298                 }
299                 else
300                         dev_put(dev);
301
302                 if (dev->flags & IFF_UP) {
303                         printk(KERN_ERR DRV_NAME
304                                ": %s: Error: Unable to enslave %s "
305                                "because it is already up.\n",
306                                bond->dev->name, dev->name);
307                         ret = -EPERM;
308                         goto out;
309                 }
310                 /* If this is the first slave, then we need to set
311                    the master's hardware address to be the same as the
312                    slave's. */
313                 if (!(*((u32 *) & (bond->dev->dev_addr[0])))) {
314                         memcpy(bond->dev->dev_addr, dev->dev_addr,
315                                dev->addr_len);
316                 }
317
318                 /* Set the slave's MTU to match the bond */
319                 original_mtu = dev->mtu;
320                 if (dev->mtu != bond->dev->mtu) {
321                         if (dev->change_mtu) {
322                                 res = dev->change_mtu(dev,
323                                                       bond->dev->mtu);
324                                 if (res) {
325                                         ret = res;
326                                         goto out;
327                                 }
328                         } else {
329                                 dev->mtu = bond->dev->mtu;
330                         }
331                 }
332                 res = bond_enslave(bond->dev, dev);
333                 bond_for_each_slave(bond, slave, i)
334                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0)
335                                 slave->original_mtu = original_mtu;
336                 if (res) {
337                         ret = res;
338                 }
339                 goto out;
340         }
341
342         if (command[0] == '-') {
343                 dev = NULL;
344                 bond_for_each_slave(bond, slave, i)
345                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
346                                 dev = slave->dev;
347                                 original_mtu = slave->original_mtu;
348                                 break;
349                         }
350                 if (dev) {
351                         printk(KERN_INFO DRV_NAME ": %s: Removing slave %s\n",
352                                 bond->dev->name, dev->name);
353                         if (bond->setup_by_slave)
354                                 res = bond_release_and_destroy(bond->dev, dev);
355                         else
356                                 res = bond_release(bond->dev, dev);
357                         if (res) {
358                                 ret = res;
359                                 goto out;
360                         }
361                         /* set the slave MTU to the default */
362                         if (dev->change_mtu) {
363                                 dev->change_mtu(dev, original_mtu);
364                         } else {
365                                 dev->mtu = original_mtu;
366                         }
367                 }
368                 else {
369                         printk(KERN_ERR DRV_NAME ": unable to remove non-existent slave %s for bond %s.\n",
370                                 ifname, bond->dev->name);
371                         ret = -ENODEV;
372                 }
373                 goto out;
374         }
375
376 err_no_cmd:
377         printk(KERN_ERR DRV_NAME ": no command found in slaves file for bond %s. Use +ifname or -ifname.\n", bond->dev->name);
378         ret = -EPERM;
379
380 out:
381         up_write(&(bonding_rwsem));
382         rtnl_unlock();
383         return ret;
384 }
385
386 static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves, bonding_store_slaves);
387
388 /*
389  * Show and set the bonding mode.  The bond interface must be down to
390  * change the mode.
391  */
392 static ssize_t bonding_show_mode(struct device *d,
393                                  struct device_attribute *attr, char *buf)
394 {
395         struct bonding *bond = to_bond(d);
396
397         return sprintf(buf, "%s %d\n",
398                         bond_mode_tbl[bond->params.mode].modename,
399                         bond->params.mode);
400 }
401
402 static ssize_t bonding_store_mode(struct device *d,
403                                   struct device_attribute *attr,
404                                   const char *buf, size_t count)
405 {
406         int new_value, ret = count;
407         struct bonding *bond = to_bond(d);
408
409         if (bond->dev->flags & IFF_UP) {
410                 printk(KERN_ERR DRV_NAME
411                        ": unable to update mode of %s because interface is up.\n",
412                        bond->dev->name);
413                 ret = -EPERM;
414                 goto out;
415         }
416
417         new_value = bond_parse_parm(buf, bond_mode_tbl);
418         if (new_value < 0)  {
419                 printk(KERN_ERR DRV_NAME
420                        ": %s: Ignoring invalid mode value %.*s.\n",
421                        bond->dev->name,
422                        (int)strlen(buf) - 1, buf);
423                 ret = -EINVAL;
424                 goto out;
425         } else {
426                 if (bond->params.mode == BOND_MODE_8023AD)
427                         bond_unset_master_3ad_flags(bond);
428
429                 if (bond->params.mode == BOND_MODE_ALB)
430                         bond_unset_master_alb_flags(bond);
431
432                 bond->params.mode = new_value;
433                 bond_set_mode_ops(bond, bond->params.mode);
434                 printk(KERN_INFO DRV_NAME ": %s: setting mode to %s (%d).\n",
435                         bond->dev->name, bond_mode_tbl[new_value].modename, new_value);
436         }
437 out:
438         return ret;
439 }
440 static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR, bonding_show_mode, bonding_store_mode);
441
442 /*
443  * Show and set the bonding transmit hash method.  The bond interface must be down to
444  * change the xmit hash policy.
445  */
446 static ssize_t bonding_show_xmit_hash(struct device *d,
447                                       struct device_attribute *attr,
448                                       char *buf)
449 {
450         struct bonding *bond = to_bond(d);
451
452         return sprintf(buf, "%s %d\n",
453                        xmit_hashtype_tbl[bond->params.xmit_policy].modename,
454                        bond->params.xmit_policy);
455 }
456
457 static ssize_t bonding_store_xmit_hash(struct device *d,
458                                        struct device_attribute *attr,
459                                        const char *buf, size_t count)
460 {
461         int new_value, ret = count;
462         struct bonding *bond = to_bond(d);
463
464         if (bond->dev->flags & IFF_UP) {
465                 printk(KERN_ERR DRV_NAME
466                        "%s: Interface is up. Unable to update xmit policy.\n",
467                        bond->dev->name);
468                 ret = -EPERM;
469                 goto out;
470         }
471
472         new_value = bond_parse_parm(buf, xmit_hashtype_tbl);
473         if (new_value < 0)  {
474                 printk(KERN_ERR DRV_NAME
475                        ": %s: Ignoring invalid xmit hash policy value %.*s.\n",
476                        bond->dev->name,
477                        (int)strlen(buf) - 1, buf);
478                 ret = -EINVAL;
479                 goto out;
480         } else {
481                 bond->params.xmit_policy = new_value;
482                 bond_set_mode_ops(bond, bond->params.mode);
483                 printk(KERN_INFO DRV_NAME ": %s: setting xmit hash policy to %s (%d).\n",
484                         bond->dev->name, xmit_hashtype_tbl[new_value].modename, new_value);
485         }
486 out:
487         return ret;
488 }
489 static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR, bonding_show_xmit_hash, bonding_store_xmit_hash);
490
491 /*
492  * Show and set arp_validate.
493  */
494 static ssize_t bonding_show_arp_validate(struct device *d,
495                                          struct device_attribute *attr,
496                                          char *buf)
497 {
498         struct bonding *bond = to_bond(d);
499
500         return sprintf(buf, "%s %d\n",
501                        arp_validate_tbl[bond->params.arp_validate].modename,
502                        bond->params.arp_validate);
503 }
504
505 static ssize_t bonding_store_arp_validate(struct device *d,
506                                           struct device_attribute *attr,
507                                           const char *buf, size_t count)
508 {
509         int new_value;
510         struct bonding *bond = to_bond(d);
511
512         new_value = bond_parse_parm(buf, arp_validate_tbl);
513         if (new_value < 0) {
514                 printk(KERN_ERR DRV_NAME
515                        ": %s: Ignoring invalid arp_validate value %s\n",
516                        bond->dev->name, buf);
517                 return -EINVAL;
518         }
519         if (new_value && (bond->params.mode != BOND_MODE_ACTIVEBACKUP)) {
520                 printk(KERN_ERR DRV_NAME
521                        ": %s: arp_validate only supported in active-backup mode.\n",
522                        bond->dev->name);
523                 return -EINVAL;
524         }
525         printk(KERN_INFO DRV_NAME ": %s: setting arp_validate to %s (%d).\n",
526                bond->dev->name, arp_validate_tbl[new_value].modename,
527                new_value);
528
529         if (!bond->params.arp_validate && new_value) {
530                 bond_register_arp(bond);
531         } else if (bond->params.arp_validate && !new_value) {
532                 bond_unregister_arp(bond);
533         }
534
535         bond->params.arp_validate = new_value;
536
537         return count;
538 }
539
540 static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate, bonding_store_arp_validate);
541
542 /*
543  * Show and store fail_over_mac.  User only allowed to change the
544  * value when there are no slaves.
545  */
546 static ssize_t bonding_show_fail_over_mac(struct device *d, struct device_attribute *attr, char *buf)
547 {
548         struct bonding *bond = to_bond(d);
549
550         return sprintf(buf, "%d\n", bond->params.fail_over_mac) + 1;
551 }
552
553 static ssize_t bonding_store_fail_over_mac(struct device *d, struct device_attribute *attr, const char *buf, size_t count)
554 {
555         int new_value;
556         int ret = count;
557         struct bonding *bond = to_bond(d);
558
559         if (bond->slave_cnt != 0) {
560                 printk(KERN_ERR DRV_NAME
561                        ": %s: Can't alter fail_over_mac with slaves in bond.\n",
562                        bond->dev->name);
563                 ret = -EPERM;
564                 goto out;
565         }
566
567         if (sscanf(buf, "%d", &new_value) != 1) {
568                 printk(KERN_ERR DRV_NAME
569                        ": %s: no fail_over_mac value specified.\n",
570                        bond->dev->name);
571                 ret = -EINVAL;
572                 goto out;
573         }
574
575         if ((new_value == 0) || (new_value == 1)) {
576                 bond->params.fail_over_mac = new_value;
577                 printk(KERN_INFO DRV_NAME ": %s: Setting fail_over_mac to %d.\n",
578                        bond->dev->name, new_value);
579         } else {
580                 printk(KERN_INFO DRV_NAME
581                        ": %s: Ignoring invalid fail_over_mac value %d.\n",
582                        bond->dev->name, new_value);
583         }
584 out:
585         return ret;
586 }
587
588 static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR, bonding_show_fail_over_mac, bonding_store_fail_over_mac);
589
590 /*
591  * Show and set the arp timer interval.  There are two tricky bits
592  * here.  First, if ARP monitoring is activated, then we must disable
593  * MII monitoring.  Second, if the ARP timer isn't running, we must
594  * start it.
595  */
596 static ssize_t bonding_show_arp_interval(struct device *d,
597                                          struct device_attribute *attr,
598                                          char *buf)
599 {
600         struct bonding *bond = to_bond(d);
601
602         return sprintf(buf, "%d\n", bond->params.arp_interval);
603 }
604
605 static ssize_t bonding_store_arp_interval(struct device *d,
606                                           struct device_attribute *attr,
607                                           const char *buf, size_t count)
608 {
609         int new_value, ret = count;
610         struct bonding *bond = to_bond(d);
611
612         if (sscanf(buf, "%d", &new_value) != 1) {
613                 printk(KERN_ERR DRV_NAME
614                        ": %s: no arp_interval value specified.\n",
615                        bond->dev->name);
616                 ret = -EINVAL;
617                 goto out;
618         }
619         if (new_value < 0) {
620                 printk(KERN_ERR DRV_NAME
621                        ": %s: Invalid arp_interval value %d not in range 1-%d; rejected.\n",
622                        bond->dev->name, new_value, INT_MAX);
623                 ret = -EINVAL;
624                 goto out;
625         }
626
627         printk(KERN_INFO DRV_NAME
628                ": %s: Setting ARP monitoring interval to %d.\n",
629                bond->dev->name, new_value);
630         bond->params.arp_interval = new_value;
631         if (bond->params.miimon) {
632                 printk(KERN_INFO DRV_NAME
633                        ": %s: ARP monitoring cannot be used with MII monitoring. "
634                        "%s Disabling MII monitoring.\n",
635                        bond->dev->name, bond->dev->name);
636                 bond->params.miimon = 0;
637                 if (delayed_work_pending(&bond->mii_work)) {
638                         cancel_delayed_work(&bond->mii_work);
639                         flush_workqueue(bond->wq);
640                 }
641         }
642         if (!bond->params.arp_targets[0]) {
643                 printk(KERN_INFO DRV_NAME
644                        ": %s: ARP monitoring has been set up, "
645                        "but no ARP targets have been specified.\n",
646                        bond->dev->name);
647         }
648         if (bond->dev->flags & IFF_UP) {
649                 /* If the interface is up, we may need to fire off
650                  * the ARP timer.  If the interface is down, the
651                  * timer will get fired off when the open function
652                  * is called.
653                  */
654                 if (!delayed_work_pending(&bond->arp_work)) {
655                         if (bond->params.mode == BOND_MODE_ACTIVEBACKUP)
656                                 INIT_DELAYED_WORK(&bond->arp_work,
657                                                   bond_activebackup_arp_mon);
658                         else
659                                 INIT_DELAYED_WORK(&bond->arp_work,
660                                                   bond_loadbalance_arp_mon);
661
662                         queue_delayed_work(bond->wq, &bond->arp_work, 0);
663                 }
664         }
665
666 out:
667         return ret;
668 }
669 static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR , bonding_show_arp_interval, bonding_store_arp_interval);
670
671 /*
672  * Show and set the arp targets.
673  */
674 static ssize_t bonding_show_arp_targets(struct device *d,
675                                         struct device_attribute *attr,
676                                         char *buf)
677 {
678         int i, res = 0;
679         struct bonding *bond = to_bond(d);
680
681         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
682                 if (bond->params.arp_targets[i])
683                         res += sprintf(buf + res, "%u.%u.%u.%u ",
684                                NIPQUAD(bond->params.arp_targets[i]));
685         }
686         if (res)
687                 buf[res-1] = '\n'; /* eat the leftover space */
688         return res;
689 }
690
691 static ssize_t bonding_store_arp_targets(struct device *d,
692                                          struct device_attribute *attr,
693                                          const char *buf, size_t count)
694 {
695         __be32 newtarget;
696         int i = 0, done = 0, ret = count;
697         struct bonding *bond = to_bond(d);
698         __be32 *targets;
699
700         targets = bond->params.arp_targets;
701         newtarget = in_aton(buf + 1);
702         /* look for adds */
703         if (buf[0] == '+') {
704                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
705                         printk(KERN_ERR DRV_NAME
706                                ": %s: invalid ARP target %u.%u.%u.%u specified for addition\n",
707                                bond->dev->name, NIPQUAD(newtarget));
708                         ret = -EINVAL;
709                         goto out;
710                 }
711                 /* look for an empty slot to put the target in, and check for dupes */
712                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
713                         if (targets[i] == newtarget) { /* duplicate */
714                                 printk(KERN_ERR DRV_NAME
715                                        ": %s: ARP target %u.%u.%u.%u is already present\n",
716                                        bond->dev->name, NIPQUAD(newtarget));
717                                 if (done)
718                                         targets[i] = 0;
719                                 ret = -EINVAL;
720                                 goto out;
721                         }
722                         if (targets[i] == 0 && !done) {
723                                 printk(KERN_INFO DRV_NAME
724                                        ": %s: adding ARP target %d.%d.%d.%d.\n",
725                                        bond->dev->name, NIPQUAD(newtarget));
726                                 done = 1;
727                                 targets[i] = newtarget;
728                         }
729                 }
730                 if (!done) {
731                         printk(KERN_ERR DRV_NAME
732                                ": %s: ARP target table is full!\n",
733                                bond->dev->name);
734                         ret = -EINVAL;
735                         goto out;
736                 }
737
738         }
739         else if (buf[0] == '-') {
740                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
741                         printk(KERN_ERR DRV_NAME
742                                ": %s: invalid ARP target %d.%d.%d.%d specified for removal\n",
743                                bond->dev->name, NIPQUAD(newtarget));
744                         ret = -EINVAL;
745                         goto out;
746                 }
747
748                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
749                         if (targets[i] == newtarget) {
750                                 printk(KERN_INFO DRV_NAME
751                                        ": %s: removing ARP target %d.%d.%d.%d.\n",
752                                        bond->dev->name, NIPQUAD(newtarget));
753                                 targets[i] = 0;
754                                 done = 1;
755                         }
756                 }
757                 if (!done) {
758                         printk(KERN_INFO DRV_NAME
759                                ": %s: unable to remove nonexistent ARP target %d.%d.%d.%d.\n",
760                                bond->dev->name, NIPQUAD(newtarget));
761                         ret = -EINVAL;
762                         goto out;
763                 }
764         }
765         else {
766                 printk(KERN_ERR DRV_NAME ": no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
767                         bond->dev->name);
768                 ret = -EPERM;
769                 goto out;
770         }
771
772 out:
773         return ret;
774 }
775 static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
776
777 /*
778  * Show and set the up and down delays.  These must be multiples of the
779  * MII monitoring value, and are stored internally as the multiplier.
780  * Thus, we must translate to MS for the real world.
781  */
782 static ssize_t bonding_show_downdelay(struct device *d,
783                                       struct device_attribute *attr,
784                                       char *buf)
785 {
786         struct bonding *bond = to_bond(d);
787
788         return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
789 }
790
791 static ssize_t bonding_store_downdelay(struct device *d,
792                                        struct device_attribute *attr,
793                                        const char *buf, size_t count)
794 {
795         int new_value, ret = count;
796         struct bonding *bond = to_bond(d);
797
798         if (!(bond->params.miimon)) {
799                 printk(KERN_ERR DRV_NAME
800                        ": %s: Unable to set down delay as MII monitoring is disabled\n",
801                        bond->dev->name);
802                 ret = -EPERM;
803                 goto out;
804         }
805
806         if (sscanf(buf, "%d", &new_value) != 1) {
807                 printk(KERN_ERR DRV_NAME
808                        ": %s: no down delay value specified.\n",
809                        bond->dev->name);
810                 ret = -EINVAL;
811                 goto out;
812         }
813         if (new_value < 0) {
814                 printk(KERN_ERR DRV_NAME
815                        ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
816                        bond->dev->name, new_value, 1, INT_MAX);
817                 ret = -EINVAL;
818                 goto out;
819         } else {
820                 if ((new_value % bond->params.miimon) != 0) {
821                         printk(KERN_WARNING DRV_NAME
822                                ": %s: Warning: down delay (%d) is not a multiple "
823                                "of miimon (%d), delay rounded to %d ms\n",
824                                bond->dev->name, new_value, bond->params.miimon,
825                                (new_value / bond->params.miimon) *
826                                bond->params.miimon);
827                 }
828                 bond->params.downdelay = new_value / bond->params.miimon;
829                 printk(KERN_INFO DRV_NAME ": %s: Setting down delay to %d.\n",
830                        bond->dev->name, bond->params.downdelay * bond->params.miimon);
831
832         }
833
834 out:
835         return ret;
836 }
837 static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR , bonding_show_downdelay, bonding_store_downdelay);
838
839 static ssize_t bonding_show_updelay(struct device *d,
840                                     struct device_attribute *attr,
841                                     char *buf)
842 {
843         struct bonding *bond = to_bond(d);
844
845         return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
846
847 }
848
849 static ssize_t bonding_store_updelay(struct device *d,
850                                      struct device_attribute *attr,
851                                      const char *buf, size_t count)
852 {
853         int new_value, ret = count;
854         struct bonding *bond = to_bond(d);
855
856         if (!(bond->params.miimon)) {
857                 printk(KERN_ERR DRV_NAME
858                        ": %s: Unable to set up delay as MII monitoring is disabled\n",
859                        bond->dev->name);
860                 ret = -EPERM;
861                 goto out;
862         }
863
864         if (sscanf(buf, "%d", &new_value) != 1) {
865                 printk(KERN_ERR DRV_NAME
866                        ": %s: no up delay value specified.\n",
867                        bond->dev->name);
868                 ret = -EINVAL;
869                 goto out;
870         }
871         if (new_value < 0) {
872                 printk(KERN_ERR DRV_NAME
873                        ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
874                        bond->dev->name, new_value, 1, INT_MAX);
875                 ret = -EINVAL;
876                 goto out;
877         } else {
878                 if ((new_value % bond->params.miimon) != 0) {
879                         printk(KERN_WARNING DRV_NAME
880                                ": %s: Warning: up delay (%d) is not a multiple "
881                                "of miimon (%d), updelay rounded to %d ms\n",
882                                bond->dev->name, new_value, bond->params.miimon,
883                                (new_value / bond->params.miimon) *
884                                bond->params.miimon);
885                 }
886                 bond->params.updelay = new_value / bond->params.miimon;
887                 printk(KERN_INFO DRV_NAME ": %s: Setting up delay to %d.\n",
888                        bond->dev->name, bond->params.updelay * bond->params.miimon);
889
890         }
891
892 out:
893         return ret;
894 }
895 static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR , bonding_show_updelay, bonding_store_updelay);
896
897 /*
898  * Show and set the LACP interval.  Interface must be down, and the mode
899  * must be set to 802.3ad mode.
900  */
901 static ssize_t bonding_show_lacp(struct device *d,
902                                  struct device_attribute *attr,
903                                  char *buf)
904 {
905         struct bonding *bond = to_bond(d);
906
907         return sprintf(buf, "%s %d\n",
908                 bond_lacp_tbl[bond->params.lacp_fast].modename,
909                 bond->params.lacp_fast);
910 }
911
912 static ssize_t bonding_store_lacp(struct device *d,
913                                   struct device_attribute *attr,
914                                   const char *buf, size_t count)
915 {
916         int new_value, ret = count;
917         struct bonding *bond = to_bond(d);
918
919         if (bond->dev->flags & IFF_UP) {
920                 printk(KERN_ERR DRV_NAME
921                        ": %s: Unable to update LACP rate because interface is up.\n",
922                        bond->dev->name);
923                 ret = -EPERM;
924                 goto out;
925         }
926
927         if (bond->params.mode != BOND_MODE_8023AD) {
928                 printk(KERN_ERR DRV_NAME
929                        ": %s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
930                        bond->dev->name);
931                 ret = -EPERM;
932                 goto out;
933         }
934
935         new_value = bond_parse_parm(buf, bond_lacp_tbl);
936
937         if ((new_value == 1) || (new_value == 0)) {
938                 bond->params.lacp_fast = new_value;
939                 printk(KERN_INFO DRV_NAME
940                        ": %s: Setting LACP rate to %s (%d).\n",
941                        bond->dev->name, bond_lacp_tbl[new_value].modename, new_value);
942         } else {
943                 printk(KERN_ERR DRV_NAME
944                        ": %s: Ignoring invalid LACP rate value %.*s.\n",
945                         bond->dev->name, (int)strlen(buf) - 1, buf);
946                 ret = -EINVAL;
947         }
948 out:
949         return ret;
950 }
951 static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR, bonding_show_lacp, bonding_store_lacp);
952
953 /*
954  * Show and set the MII monitor interval.  There are two tricky bits
955  * here.  First, if MII monitoring is activated, then we must disable
956  * ARP monitoring.  Second, if the timer isn't running, we must
957  * start it.
958  */
959 static ssize_t bonding_show_miimon(struct device *d,
960                                    struct device_attribute *attr,
961                                    char *buf)
962 {
963         struct bonding *bond = to_bond(d);
964
965         return sprintf(buf, "%d\n", bond->params.miimon);
966 }
967
968 static ssize_t bonding_store_miimon(struct device *d,
969                                     struct device_attribute *attr,
970                                     const char *buf, size_t count)
971 {
972         int new_value, ret = count;
973         struct bonding *bond = to_bond(d);
974
975         if (sscanf(buf, "%d", &new_value) != 1) {
976                 printk(KERN_ERR DRV_NAME
977                        ": %s: no miimon value specified.\n",
978                        bond->dev->name);
979                 ret = -EINVAL;
980                 goto out;
981         }
982         if (new_value < 0) {
983                 printk(KERN_ERR DRV_NAME
984                        ": %s: Invalid miimon value %d not in range %d-%d; rejected.\n",
985                        bond->dev->name, new_value, 1, INT_MAX);
986                 ret = -EINVAL;
987                 goto out;
988         } else {
989                 printk(KERN_INFO DRV_NAME
990                        ": %s: Setting MII monitoring interval to %d.\n",
991                        bond->dev->name, new_value);
992                 bond->params.miimon = new_value;
993                 if(bond->params.updelay)
994                         printk(KERN_INFO DRV_NAME
995                               ": %s: Note: Updating updelay (to %d) "
996                               "since it is a multiple of the miimon value.\n",
997                               bond->dev->name,
998                               bond->params.updelay * bond->params.miimon);
999                 if(bond->params.downdelay)
1000                         printk(KERN_INFO DRV_NAME
1001                               ": %s: Note: Updating downdelay (to %d) "
1002                               "since it is a multiple of the miimon value.\n",
1003                               bond->dev->name,
1004                               bond->params.downdelay * bond->params.miimon);
1005                 if (bond->params.arp_interval) {
1006                         printk(KERN_INFO DRV_NAME
1007                                ": %s: MII monitoring cannot be used with "
1008                                "ARP monitoring. Disabling ARP monitoring...\n",
1009                                bond->dev->name);
1010                         bond->params.arp_interval = 0;
1011                         if (bond->params.arp_validate) {
1012                                 bond_unregister_arp(bond);
1013                                 bond->params.arp_validate =
1014                                         BOND_ARP_VALIDATE_NONE;
1015                         }
1016                         if (delayed_work_pending(&bond->arp_work)) {
1017                                 cancel_delayed_work(&bond->arp_work);
1018                                 flush_workqueue(bond->wq);
1019                         }
1020                 }
1021
1022                 if (bond->dev->flags & IFF_UP) {
1023                         /* If the interface is up, we may need to fire off
1024                          * the MII timer. If the interface is down, the
1025                          * timer will get fired off when the open function
1026                          * is called.
1027                          */
1028                         if (!delayed_work_pending(&bond->mii_work)) {
1029                                 INIT_DELAYED_WORK(&bond->mii_work,
1030                                                   bond_mii_monitor);
1031                                 queue_delayed_work(bond->wq,
1032                                                    &bond->mii_work, 0);
1033                         }
1034                 }
1035         }
1036 out:
1037         return ret;
1038 }
1039 static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR, bonding_show_miimon, bonding_store_miimon);
1040
1041 /*
1042  * Show and set the primary slave.  The store function is much
1043  * simpler than bonding_store_slaves function because it only needs to
1044  * handle one interface name.
1045  * The bond must be a mode that supports a primary for this be
1046  * set.
1047  */
1048 static ssize_t bonding_show_primary(struct device *d,
1049                                     struct device_attribute *attr,
1050                                     char *buf)
1051 {
1052         int count = 0;
1053         struct bonding *bond = to_bond(d);
1054
1055         if (bond->primary_slave)
1056                 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);
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         rtnl_lock();
1070         read_lock(&bond->lock);
1071         write_lock_bh(&bond->curr_slave_lock);
1072
1073         if (!USES_PRIMARY(bond->params.mode)) {
1074                 printk(KERN_INFO DRV_NAME
1075                        ": %s: Unable to set primary slave; %s is in mode %d\n",
1076                        bond->dev->name, bond->dev->name, bond->params.mode);
1077         } else {
1078                 bond_for_each_slave(bond, slave, i) {
1079                         if (strnicmp
1080                             (slave->dev->name, buf,
1081                              strlen(slave->dev->name)) == 0) {
1082                                 printk(KERN_INFO DRV_NAME
1083                                        ": %s: Setting %s as primary slave.\n",
1084                                        bond->dev->name, slave->dev->name);
1085                                 bond->primary_slave = slave;
1086                                 bond_select_active_slave(bond);
1087                                 goto out;
1088                         }
1089                 }
1090
1091                 /* if we got here, then we didn't match the name of any slave */
1092
1093                 if (strlen(buf) == 0 || buf[0] == '\n') {
1094                         printk(KERN_INFO DRV_NAME
1095                                ": %s: Setting primary slave to None.\n",
1096                                bond->dev->name);
1097                         bond->primary_slave = NULL;
1098                                 bond_select_active_slave(bond);
1099                 } else {
1100                         printk(KERN_INFO DRV_NAME
1101                                ": %s: Unable to set %.*s as primary slave as it is not a slave.\n",
1102                                bond->dev->name, (int)strlen(buf) - 1, buf);
1103                 }
1104         }
1105 out:
1106         write_unlock_bh(&bond->curr_slave_lock);
1107         read_unlock(&bond->lock);
1108         rtnl_unlock();
1109
1110         return count;
1111 }
1112 static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR, bonding_show_primary, bonding_store_primary);
1113
1114 /*
1115  * Show and set the use_carrier flag.
1116  */
1117 static ssize_t bonding_show_carrier(struct device *d,
1118                                     struct device_attribute *attr,
1119                                     char *buf)
1120 {
1121         struct bonding *bond = to_bond(d);
1122
1123         return sprintf(buf, "%d\n", bond->params.use_carrier);
1124 }
1125
1126 static ssize_t bonding_store_carrier(struct device *d,
1127                                      struct device_attribute *attr,
1128                                      const char *buf, size_t count)
1129 {
1130         int new_value, ret = count;
1131         struct bonding *bond = to_bond(d);
1132
1133
1134         if (sscanf(buf, "%d", &new_value) != 1) {
1135                 printk(KERN_ERR DRV_NAME
1136                        ": %s: no use_carrier value specified.\n",
1137                        bond->dev->name);
1138                 ret = -EINVAL;
1139                 goto out;
1140         }
1141         if ((new_value == 0) || (new_value == 1)) {
1142                 bond->params.use_carrier = new_value;
1143                 printk(KERN_INFO DRV_NAME ": %s: Setting use_carrier to %d.\n",
1144                        bond->dev->name, new_value);
1145         } else {
1146                 printk(KERN_INFO DRV_NAME
1147                        ": %s: Ignoring invalid use_carrier value %d.\n",
1148                        bond->dev->name, new_value);
1149         }
1150 out:
1151         return count;
1152 }
1153 static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR, bonding_show_carrier, bonding_store_carrier);
1154
1155
1156 /*
1157  * Show and set currently active_slave.
1158  */
1159 static ssize_t bonding_show_active_slave(struct device *d,
1160                                          struct device_attribute *attr,
1161                                          char *buf)
1162 {
1163         struct slave *curr;
1164         struct bonding *bond = to_bond(d);
1165         int count = 0;
1166
1167         read_lock(&bond->curr_slave_lock);
1168         curr = bond->curr_active_slave;
1169         read_unlock(&bond->curr_slave_lock);
1170
1171         if (USES_PRIMARY(bond->params.mode) && curr)
1172                 count = sprintf(buf, "%s\n", curr->dev->name);
1173         return count;
1174 }
1175
1176 static ssize_t bonding_store_active_slave(struct device *d,
1177                                           struct device_attribute *attr,
1178                                           const char *buf, size_t count)
1179 {
1180         int i;
1181         struct slave *slave;
1182         struct slave *old_active = NULL;
1183         struct slave *new_active = NULL;
1184         struct bonding *bond = to_bond(d);
1185
1186         rtnl_lock();
1187         read_lock(&bond->lock);
1188         write_lock_bh(&bond->curr_slave_lock);
1189
1190         if (!USES_PRIMARY(bond->params.mode)) {
1191                 printk(KERN_INFO DRV_NAME
1192                        ": %s: Unable to change active slave; %s is in mode %d\n",
1193                        bond->dev->name, bond->dev->name, bond->params.mode);
1194         } else {
1195                 bond_for_each_slave(bond, slave, i) {
1196                         if (strnicmp
1197                             (slave->dev->name, buf,
1198                              strlen(slave->dev->name)) == 0) {
1199                                 old_active = bond->curr_active_slave;
1200                                 new_active = slave;
1201                                 if (new_active == old_active) {
1202                                         /* do nothing */
1203                                         printk(KERN_INFO DRV_NAME
1204                                                ": %s: %s is already the current active slave.\n",
1205                                                bond->dev->name, slave->dev->name);
1206                                         goto out;
1207                                 }
1208                                 else {
1209                                         if ((new_active) &&
1210                                             (old_active) &&
1211                                             (new_active->link == BOND_LINK_UP) &&
1212                                             IS_UP(new_active->dev)) {
1213                                                 printk(KERN_INFO DRV_NAME
1214                                                       ": %s: Setting %s as active slave.\n",
1215                                                       bond->dev->name, slave->dev->name);
1216                                                 bond_change_active_slave(bond, new_active);
1217                                         }
1218                                         else {
1219                                                 printk(KERN_INFO DRV_NAME
1220                                                       ": %s: Could not set %s as active slave; "
1221                                                       "either %s is down or the link is down.\n",
1222                                                       bond->dev->name, slave->dev->name,
1223                                                       slave->dev->name);
1224                                         }
1225                                         goto out;
1226                                 }
1227                         }
1228                 }
1229
1230                 /* if we got here, then we didn't match the name of any slave */
1231
1232                 if (strlen(buf) == 0 || buf[0] == '\n') {
1233                         printk(KERN_INFO DRV_NAME
1234                                ": %s: Setting active slave to None.\n",
1235                                bond->dev->name);
1236                         bond->primary_slave = NULL;
1237                                 bond_select_active_slave(bond);
1238                 } else {
1239                         printk(KERN_INFO DRV_NAME
1240                                ": %s: Unable to set %.*s as active slave as it is not a slave.\n",
1241                                bond->dev->name, (int)strlen(buf) - 1, buf);
1242                 }
1243         }
1244 out:
1245         write_unlock_bh(&bond->curr_slave_lock);
1246         read_unlock(&bond->lock);
1247         rtnl_unlock();
1248
1249         return count;
1250
1251 }
1252 static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR, bonding_show_active_slave, bonding_store_active_slave);
1253
1254
1255 /*
1256  * Show link status of the bond interface.
1257  */
1258 static ssize_t bonding_show_mii_status(struct device *d,
1259                                        struct device_attribute *attr,
1260                                        char *buf)
1261 {
1262         struct slave *curr;
1263         struct bonding *bond = to_bond(d);
1264
1265         read_lock(&bond->curr_slave_lock);
1266         curr = bond->curr_active_slave;
1267         read_unlock(&bond->curr_slave_lock);
1268
1269         return sprintf(buf, "%s\n", (curr) ? "up" : "down");
1270 }
1271 static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1272
1273
1274 /*
1275  * Show current 802.3ad aggregator ID.
1276  */
1277 static ssize_t bonding_show_ad_aggregator(struct device *d,
1278                                           struct device_attribute *attr,
1279                                           char *buf)
1280 {
1281         int count = 0;
1282         struct bonding *bond = to_bond(d);
1283
1284         if (bond->params.mode == BOND_MODE_8023AD) {
1285                 struct ad_info ad_info;
1286                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.aggregator_id);
1287         }
1288
1289         return count;
1290 }
1291 static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1292
1293
1294 /*
1295  * Show number of active 802.3ad ports.
1296  */
1297 static ssize_t bonding_show_ad_num_ports(struct device *d,
1298                                          struct device_attribute *attr,
1299                                          char *buf)
1300 {
1301         int count = 0;
1302         struct bonding *bond = to_bond(d);
1303
1304         if (bond->params.mode == BOND_MODE_8023AD) {
1305                 struct ad_info ad_info;
1306                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0: ad_info.ports);
1307         }
1308
1309         return count;
1310 }
1311 static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1312
1313
1314 /*
1315  * Show current 802.3ad actor key.
1316  */
1317 static ssize_t bonding_show_ad_actor_key(struct device *d,
1318                                          struct device_attribute *attr,
1319                                          char *buf)
1320 {
1321         int count = 0;
1322         struct bonding *bond = to_bond(d);
1323
1324         if (bond->params.mode == BOND_MODE_8023AD) {
1325                 struct ad_info ad_info;
1326                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.actor_key);
1327         }
1328
1329         return count;
1330 }
1331 static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1332
1333
1334 /*
1335  * Show current 802.3ad partner key.
1336  */
1337 static ssize_t bonding_show_ad_partner_key(struct device *d,
1338                                            struct device_attribute *attr,
1339                                            char *buf)
1340 {
1341         int count = 0;
1342         struct bonding *bond = to_bond(d);
1343
1344         if (bond->params.mode == BOND_MODE_8023AD) {
1345                 struct ad_info ad_info;
1346                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.partner_key);
1347         }
1348
1349         return count;
1350 }
1351 static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1352
1353
1354 /*
1355  * Show current 802.3ad partner mac.
1356  */
1357 static ssize_t bonding_show_ad_partner_mac(struct device *d,
1358                                            struct device_attribute *attr,
1359                                            char *buf)
1360 {
1361         int count = 0;
1362         struct bonding *bond = to_bond(d);
1363         DECLARE_MAC_BUF(mac);
1364
1365         if (bond->params.mode == BOND_MODE_8023AD) {
1366                 struct ad_info ad_info;
1367                 if (!bond_3ad_get_active_agg_info(bond, &ad_info)) {
1368                         count = sprintf(buf,"%s\n",
1369                                         print_mac(mac, ad_info.partner_system));
1370                 }
1371         }
1372
1373         return count;
1374 }
1375 static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1376
1377
1378
1379 static struct attribute *per_bond_attrs[] = {
1380         &dev_attr_slaves.attr,
1381         &dev_attr_mode.attr,
1382         &dev_attr_fail_over_mac.attr,
1383         &dev_attr_arp_validate.attr,
1384         &dev_attr_arp_interval.attr,
1385         &dev_attr_arp_ip_target.attr,
1386         &dev_attr_downdelay.attr,
1387         &dev_attr_updelay.attr,
1388         &dev_attr_lacp_rate.attr,
1389         &dev_attr_xmit_hash_policy.attr,
1390         &dev_attr_miimon.attr,
1391         &dev_attr_primary.attr,
1392         &dev_attr_use_carrier.attr,
1393         &dev_attr_active_slave.attr,
1394         &dev_attr_mii_status.attr,
1395         &dev_attr_ad_aggregator.attr,
1396         &dev_attr_ad_num_ports.attr,
1397         &dev_attr_ad_actor_key.attr,
1398         &dev_attr_ad_partner_key.attr,
1399         &dev_attr_ad_partner_mac.attr,
1400         NULL,
1401 };
1402
1403 static struct attribute_group bonding_group = {
1404         .name = "bonding",
1405         .attrs = per_bond_attrs,
1406 };
1407
1408 /*
1409  * Initialize sysfs.  This sets up the bonding_masters file in
1410  * /sys/class/net.
1411  */
1412 int bond_create_sysfs(void)
1413 {
1414         int ret = 0;
1415         struct bonding *firstbond;
1416
1417         /* get the netdev class pointer */
1418         firstbond = container_of(bond_dev_list.next, struct bonding, bond_list);
1419         if (!firstbond)
1420                 return -ENODEV;
1421
1422         netdev_class = firstbond->dev->dev.class;
1423         if (!netdev_class)
1424                 return -ENODEV;
1425
1426         ret = class_create_file(netdev_class, &class_attr_bonding_masters);
1427         /*
1428          * Permit multiple loads of the module by ignoring failures to
1429          * create the bonding_masters sysfs file.  Bonding devices
1430          * created by second or subsequent loads of the module will
1431          * not be listed in, or controllable by, bonding_masters, but
1432          * will have the usual "bonding" sysfs directory.
1433          *
1434          * This is done to preserve backwards compatibility for
1435          * initscripts/sysconfig, which load bonding multiple times to
1436          * configure multiple bonding devices.
1437          */
1438         if (ret == -EEXIST) {
1439                 netdev_class = NULL;
1440                 return 0;
1441         }
1442
1443         return ret;
1444
1445 }
1446
1447 /*
1448  * Remove /sys/class/net/bonding_masters.
1449  */
1450 void bond_destroy_sysfs(void)
1451 {
1452         if (netdev_class)
1453                 class_remove_file(netdev_class, &class_attr_bonding_masters);
1454 }
1455
1456 /*
1457  * Initialize sysfs for each bond.  This sets up and registers
1458  * the 'bondctl' directory for each individual bond under /sys/class/net.
1459  */
1460 int bond_create_sysfs_entry(struct bonding *bond)
1461 {
1462         struct net_device *dev = bond->dev;
1463         int err;
1464
1465         err = sysfs_create_group(&(dev->dev.kobj), &bonding_group);
1466         if (err) {
1467                 printk(KERN_EMERG "eek! didn't create group!\n");
1468         }
1469
1470         if (expected_refcount < 1)
1471                 expected_refcount = atomic_read(&bond->dev->dev.kobj.kref.refcount);
1472
1473         return err;
1474 }
1475 /*
1476  * Remove sysfs entries for each bond.
1477  */
1478 void bond_destroy_sysfs_entry(struct bonding *bond)
1479 {
1480         struct net_device *dev = bond->dev;
1481
1482         sysfs_remove_group(&(dev->dev.kobj), &bonding_group);
1483 }
1484