bonding: Remove trailing NULs from sysfs interface.
[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 *buffer)
78 {
79         int res = 0;
80         struct bonding *bond;
81
82         down_read(&(bonding_rwsem));
83
84         list_for_each_entry(bond, &bond_dev_list, bond_list) {
85                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
86                         /* not enough space for another interface name */
87                         if ((PAGE_SIZE - res) > 10)
88                                 res = PAGE_SIZE - 10;
89                         res += sprintf(buffer + res, "++more++ ");
90                         break;
91                 }
92                 res += sprintf(buffer + res, "%s ",
93                                bond->dev->name);
94         }
95         if (res) buffer[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 res = count;
113         struct bonding *bond;
114         struct bonding *nxt;
115
116         down_write(&(bonding_rwsem));
117         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
118         ifname = command + 1;
119         if ((strlen(command) <= 1) ||
120             !dev_valid_name(ifname))
121                 goto err_no_cmd;
122
123         if (command[0] == '+') {
124
125                 /* Check to see if the bond already exists. */
126                 list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list)
127                         if (strnicmp(bond->dev->name, ifname, IFNAMSIZ) == 0) {
128                                 printk(KERN_ERR DRV_NAME
129                                         ": cannot add bond %s; it already exists\n",
130                                         ifname);
131                                 res = -EPERM;
132                                 goto out;
133                         }
134
135                 printk(KERN_INFO DRV_NAME
136                         ": %s is being created...\n", ifname);
137                 if (bond_create(ifname, &bonding_defaults, &bond)) {
138                         printk(KERN_INFO DRV_NAME
139                         ": %s interface already exists. Bond creation failed.\n",
140                         ifname);
141                         res = -EPERM;
142                 }
143                 goto out;
144         }
145
146         if (command[0] == '-') {
147                 list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list)
148                         if (strnicmp(bond->dev->name, ifname, IFNAMSIZ) == 0) {
149                                 rtnl_lock();
150                                 /* check the ref count on the bond's kobject.
151                                  * If it's > expected, then there's a file open,
152                                  * and we have to fail.
153                                  */
154                                 if (atomic_read(&bond->dev->dev.kobj.kref.refcount)
155                                                         > expected_refcount){
156                                         rtnl_unlock();
157                                         printk(KERN_INFO DRV_NAME
158                                                 ": Unable remove bond %s due to open references.\n",
159                                                 ifname);
160                                         res = -EPERM;
161                                         goto out;
162                                 }
163                                 printk(KERN_INFO DRV_NAME
164                                         ": %s is being deleted...\n",
165                                         bond->dev->name);
166                                 bond_destroy(bond);
167                                 rtnl_unlock();
168                                 goto out;
169                         }
170
171                 printk(KERN_ERR DRV_NAME
172                         ": unable to delete non-existent bond %s\n", ifname);
173                 res = -ENODEV;
174                 goto out;
175         }
176
177 err_no_cmd:
178         printk(KERN_ERR DRV_NAME
179                 ": no command found in bonding_masters. Use +ifname or -ifname.\n");
180         res = -EPERM;
181
182         /* Always return either count or an error.  If you return 0, you'll
183          * get called forever, which is bad.
184          */
185 out:
186         up_write(&(bonding_rwsem));
187         return res;
188 }
189 /* class attribute for bond_masters file.  This ends up in /sys/class/net */
190 static CLASS_ATTR(bonding_masters,  S_IWUSR | S_IRUGO,
191                   bonding_show_bonds, bonding_store_bonds);
192
193 int bond_create_slave_symlinks(struct net_device *master, struct net_device *slave)
194 {
195         char linkname[IFNAMSIZ+7];
196         int ret = 0;
197
198         /* first, create a link from the slave back to the master */
199         ret = sysfs_create_link(&(slave->dev.kobj), &(master->dev.kobj),
200                                 "master");
201         if (ret)
202                 return ret;
203         /* next, create a link from the master to the slave */
204         sprintf(linkname,"slave_%s",slave->name);
205         ret = sysfs_create_link(&(master->dev.kobj), &(slave->dev.kobj),
206                                 linkname);
207         return ret;
208
209 }
210
211 void bond_destroy_slave_symlinks(struct net_device *master, struct net_device *slave)
212 {
213         char linkname[IFNAMSIZ+7];
214
215         sysfs_remove_link(&(slave->dev.kobj), "master");
216         sprintf(linkname,"slave_%s",slave->name);
217         sysfs_remove_link(&(master->dev.kobj), linkname);
218 }
219
220
221 /*
222  * Show the slaves in the current bond.
223  */
224 static ssize_t bonding_show_slaves(struct device *d,
225                                    struct device_attribute *attr, char *buf)
226 {
227         struct slave *slave;
228         int i, res = 0;
229         struct bonding *bond = to_bond(d);
230
231         read_lock(&bond->lock);
232         bond_for_each_slave(bond, slave, i) {
233                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
234                         /* not enough space for another interface name */
235                         if ((PAGE_SIZE - res) > 10)
236                                 res = PAGE_SIZE - 10;
237                         res += sprintf(buf + res, "++more++ ");
238                         break;
239                 }
240                 res += sprintf(buf + res, "%s ", slave->dev->name);
241         }
242         read_unlock(&bond->lock);
243         if (res) buf[res-1] = '\n'; /* eat the leftover space */
244         return res;
245 }
246
247 /*
248  * Set the slaves in the current bond.  The bond interface must be
249  * up for this to succeed.
250  * This function is largely the same flow as bonding_update_bonds().
251  */
252 static ssize_t bonding_store_slaves(struct device *d,
253                                     struct device_attribute *attr,
254                                     const char *buffer, size_t count)
255 {
256         char command[IFNAMSIZ + 1] = { 0, };
257         char *ifname;
258         int i, res, found, ret = count;
259         u32 original_mtu;
260         struct slave *slave;
261         struct net_device *dev = NULL;
262         struct bonding *bond = to_bond(d);
263
264         /* Quick sanity check -- is the bond interface up? */
265         if (!(bond->dev->flags & IFF_UP)) {
266                 printk(KERN_WARNING DRV_NAME
267                        ": %s: doing slave updates when interface is down.\n",
268                        bond->dev->name);
269         }
270
271         /* Note:  We can't hold bond->lock here, as bond_create grabs it. */
272
273         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
274         ifname = command + 1;
275         if ((strlen(command) <= 1) ||
276             !dev_valid_name(ifname))
277                 goto err_no_cmd;
278
279         if (command[0] == '+') {
280
281                 /* Got a slave name in ifname.  Is it already in the list? */
282                 found = 0;
283                 read_lock(&bond->lock);
284                 bond_for_each_slave(bond, slave, i)
285                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
286                                 printk(KERN_ERR DRV_NAME
287                                        ": %s: Interface %s is already enslaved!\n",
288                                        bond->dev->name, ifname);
289                                 ret = -EPERM;
290                                 read_unlock(&bond->lock);
291                                 goto out;
292                         }
293
294                 read_unlock(&bond->lock);
295                 printk(KERN_INFO DRV_NAME ": %s: Adding slave %s.\n",
296                        bond->dev->name, ifname);
297                 dev = dev_get_by_name(&init_net, ifname);
298                 if (!dev) {
299                         printk(KERN_INFO DRV_NAME
300                                ": %s: Interface %s does not exist!\n",
301                                bond->dev->name, ifname);
302                         ret = -EPERM;
303                         goto out;
304                 }
305                 else
306                         dev_put(dev);
307
308                 if (dev->flags & IFF_UP) {
309                         printk(KERN_ERR DRV_NAME
310                                ": %s: Error: Unable to enslave %s "
311                                "because it is already up.\n",
312                                bond->dev->name, dev->name);
313                         ret = -EPERM;
314                         goto out;
315                 }
316                 /* If this is the first slave, then we need to set
317                    the master's hardware address to be the same as the
318                    slave's. */
319                 if (!(*((u32 *) & (bond->dev->dev_addr[0])))) {
320                         memcpy(bond->dev->dev_addr, dev->dev_addr,
321                                dev->addr_len);
322                 }
323
324                 /* Set the slave's MTU to match the bond */
325                 original_mtu = dev->mtu;
326                 if (dev->mtu != bond->dev->mtu) {
327                         if (dev->change_mtu) {
328                                 res = dev->change_mtu(dev,
329                                                       bond->dev->mtu);
330                                 if (res) {
331                                         ret = res;
332                                         goto out;
333                                 }
334                         } else {
335                                 dev->mtu = bond->dev->mtu;
336                         }
337                 }
338                 rtnl_lock();
339                 res = bond_enslave(bond->dev, dev);
340                 bond_for_each_slave(bond, slave, i)
341                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0)
342                                 slave->original_mtu = original_mtu;
343                 rtnl_unlock();
344                 if (res) {
345                         ret = res;
346                 }
347                 goto out;
348         }
349
350         if (command[0] == '-') {
351                 dev = NULL;
352                 bond_for_each_slave(bond, slave, i)
353                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
354                                 dev = slave->dev;
355                                 original_mtu = slave->original_mtu;
356                                 break;
357                         }
358                 if (dev) {
359                         printk(KERN_INFO DRV_NAME ": %s: Removing slave %s\n",
360                                 bond->dev->name, dev->name);
361                         rtnl_lock();
362                         if (bond->setup_by_slave)
363                                 res = bond_release_and_destroy(bond->dev, dev);
364                         else
365                                 res = bond_release(bond->dev, dev);
366                         rtnl_unlock();
367                         if (res) {
368                                 ret = res;
369                                 goto out;
370                         }
371                         /* set the slave MTU to the default */
372                         if (dev->change_mtu) {
373                                 dev->change_mtu(dev, original_mtu);
374                         } else {
375                                 dev->mtu = original_mtu;
376                         }
377                 }
378                 else {
379                         printk(KERN_ERR DRV_NAME ": unable to remove non-existent slave %s for bond %s.\n",
380                                 ifname, bond->dev->name);
381                         ret = -ENODEV;
382                 }
383                 goto out;
384         }
385
386 err_no_cmd:
387         printk(KERN_ERR DRV_NAME ": no command found in slaves file for bond %s. Use +ifname or -ifname.\n", bond->dev->name);
388         ret = -EPERM;
389
390 out:
391         return ret;
392 }
393
394 static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves, bonding_store_slaves);
395
396 /*
397  * Show and set the bonding mode.  The bond interface must be down to
398  * change the mode.
399  */
400 static ssize_t bonding_show_mode(struct device *d,
401                                  struct device_attribute *attr, char *buf)
402 {
403         struct bonding *bond = to_bond(d);
404
405         return sprintf(buf, "%s %d\n",
406                         bond_mode_tbl[bond->params.mode].modename,
407                         bond->params.mode);
408 }
409
410 static ssize_t bonding_store_mode(struct device *d,
411                                   struct device_attribute *attr,
412                                   const char *buf, size_t count)
413 {
414         int new_value, ret = count;
415         struct bonding *bond = to_bond(d);
416
417         if (bond->dev->flags & IFF_UP) {
418                 printk(KERN_ERR DRV_NAME
419                        ": unable to update mode of %s because interface is up.\n",
420                        bond->dev->name);
421                 ret = -EPERM;
422                 goto out;
423         }
424
425         new_value = bond_parse_parm((char *)buf, bond_mode_tbl);
426         if (new_value < 0)  {
427                 printk(KERN_ERR DRV_NAME
428                        ": %s: Ignoring invalid mode value %.*s.\n",
429                        bond->dev->name,
430                        (int)strlen(buf) - 1, buf);
431                 ret = -EINVAL;
432                 goto out;
433         } else {
434                 if (bond->params.mode == BOND_MODE_8023AD)
435                         bond_unset_master_3ad_flags(bond);
436
437                 if (bond->params.mode == BOND_MODE_ALB)
438                         bond_unset_master_alb_flags(bond);
439
440                 bond->params.mode = new_value;
441                 bond_set_mode_ops(bond, bond->params.mode);
442                 printk(KERN_INFO DRV_NAME ": %s: setting mode to %s (%d).\n",
443                         bond->dev->name, bond_mode_tbl[new_value].modename, new_value);
444         }
445 out:
446         return ret;
447 }
448 static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR, bonding_show_mode, bonding_store_mode);
449
450 /*
451  * Show and set the bonding transmit hash method.  The bond interface must be down to
452  * change the xmit hash policy.
453  */
454 static ssize_t bonding_show_xmit_hash(struct device *d,
455                                       struct device_attribute *attr,
456                                       char *buf)
457 {
458         int count;
459         struct bonding *bond = to_bond(d);
460
461         if ((bond->params.mode != BOND_MODE_XOR) &&
462             (bond->params.mode != BOND_MODE_8023AD)) {
463                 // Not Applicable
464                 count = sprintf(buf, "NA\n");
465         } else {
466                 count = sprintf(buf, "%s %d\n",
467                         xmit_hashtype_tbl[bond->params.xmit_policy].modename,
468                         bond->params.xmit_policy);
469         }
470
471         return count;
472 }
473
474 static ssize_t bonding_store_xmit_hash(struct device *d,
475                                        struct device_attribute *attr,
476                                        const char *buf, size_t count)
477 {
478         int new_value, ret = count;
479         struct bonding *bond = to_bond(d);
480
481         if (bond->dev->flags & IFF_UP) {
482                 printk(KERN_ERR DRV_NAME
483                        "%s: Interface is up. Unable to update xmit policy.\n",
484                        bond->dev->name);
485                 ret = -EPERM;
486                 goto out;
487         }
488
489         if ((bond->params.mode != BOND_MODE_XOR) &&
490             (bond->params.mode != BOND_MODE_8023AD)) {
491                 printk(KERN_ERR DRV_NAME
492                        "%s: Transmit hash policy is irrelevant in this mode.\n",
493                        bond->dev->name);
494                 ret = -EPERM;
495                 goto out;
496         }
497
498         new_value = bond_parse_parm((char *)buf, xmit_hashtype_tbl);
499         if (new_value < 0)  {
500                 printk(KERN_ERR DRV_NAME
501                        ": %s: Ignoring invalid xmit hash policy value %.*s.\n",
502                        bond->dev->name,
503                        (int)strlen(buf) - 1, buf);
504                 ret = -EINVAL;
505                 goto out;
506         } else {
507                 bond->params.xmit_policy = new_value;
508                 bond_set_mode_ops(bond, bond->params.mode);
509                 printk(KERN_INFO DRV_NAME ": %s: setting xmit hash policy to %s (%d).\n",
510                         bond->dev->name, xmit_hashtype_tbl[new_value].modename, new_value);
511         }
512 out:
513         return ret;
514 }
515 static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR, bonding_show_xmit_hash, bonding_store_xmit_hash);
516
517 /*
518  * Show and set arp_validate.
519  */
520 static ssize_t bonding_show_arp_validate(struct device *d,
521                                          struct device_attribute *attr,
522                                          char *buf)
523 {
524         struct bonding *bond = to_bond(d);
525
526         return sprintf(buf, "%s %d\n",
527                        arp_validate_tbl[bond->params.arp_validate].modename,
528                        bond->params.arp_validate);
529 }
530
531 static ssize_t bonding_store_arp_validate(struct device *d,
532                                           struct device_attribute *attr,
533                                           const char *buf, size_t count)
534 {
535         int new_value;
536         struct bonding *bond = to_bond(d);
537
538         new_value = bond_parse_parm((char *)buf, arp_validate_tbl);
539         if (new_value < 0) {
540                 printk(KERN_ERR DRV_NAME
541                        ": %s: Ignoring invalid arp_validate value %s\n",
542                        bond->dev->name, buf);
543                 return -EINVAL;
544         }
545         if (new_value && (bond->params.mode != BOND_MODE_ACTIVEBACKUP)) {
546                 printk(KERN_ERR DRV_NAME
547                        ": %s: arp_validate only supported in active-backup mode.\n",
548                        bond->dev->name);
549                 return -EINVAL;
550         }
551         printk(KERN_INFO DRV_NAME ": %s: setting arp_validate to %s (%d).\n",
552                bond->dev->name, arp_validate_tbl[new_value].modename,
553                new_value);
554
555         if (!bond->params.arp_validate && new_value) {
556                 bond_register_arp(bond);
557         } else if (bond->params.arp_validate && !new_value) {
558                 bond_unregister_arp(bond);
559         }
560
561         bond->params.arp_validate = new_value;
562
563         return count;
564 }
565
566 static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate, bonding_store_arp_validate);
567
568 /*
569  * Show and store fail_over_mac.  User only allowed to change the
570  * value when there are no slaves.
571  */
572 static ssize_t bonding_show_fail_over_mac(struct device *d, struct device_attribute *attr, char *buf)
573 {
574         struct bonding *bond = to_bond(d);
575
576         return sprintf(buf, "%d\n", bond->params.fail_over_mac) + 1;
577 }
578
579 static ssize_t bonding_store_fail_over_mac(struct device *d, struct device_attribute *attr, const char *buf, size_t count)
580 {
581         int new_value;
582         int ret = count;
583         struct bonding *bond = to_bond(d);
584
585         if (bond->slave_cnt != 0) {
586                 printk(KERN_ERR DRV_NAME
587                        ": %s: Can't alter fail_over_mac with slaves in bond.\n",
588                        bond->dev->name);
589                 ret = -EPERM;
590                 goto out;
591         }
592
593         if (sscanf(buf, "%d", &new_value) != 1) {
594                 printk(KERN_ERR DRV_NAME
595                        ": %s: no fail_over_mac value specified.\n",
596                        bond->dev->name);
597                 ret = -EINVAL;
598                 goto out;
599         }
600
601         if ((new_value == 0) || (new_value == 1)) {
602                 bond->params.fail_over_mac = new_value;
603                 printk(KERN_INFO DRV_NAME ": %s: Setting fail_over_mac to %d.\n",
604                        bond->dev->name, new_value);
605         } else {
606                 printk(KERN_INFO DRV_NAME
607                        ": %s: Ignoring invalid fail_over_mac value %d.\n",
608                        bond->dev->name, new_value);
609         }
610 out:
611         return ret;
612 }
613
614 static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR, bonding_show_fail_over_mac, bonding_store_fail_over_mac);
615
616 /*
617  * Show and set the arp timer interval.  There are two tricky bits
618  * here.  First, if ARP monitoring is activated, then we must disable
619  * MII monitoring.  Second, if the ARP timer isn't running, we must
620  * start it.
621  */
622 static ssize_t bonding_show_arp_interval(struct device *d,
623                                          struct device_attribute *attr,
624                                          char *buf)
625 {
626         struct bonding *bond = to_bond(d);
627
628         return sprintf(buf, "%d\n", bond->params.arp_interval);
629 }
630
631 static ssize_t bonding_store_arp_interval(struct device *d,
632                                           struct device_attribute *attr,
633                                           const char *buf, size_t count)
634 {
635         int new_value, ret = count;
636         struct bonding *bond = to_bond(d);
637
638         if (sscanf(buf, "%d", &new_value) != 1) {
639                 printk(KERN_ERR DRV_NAME
640                        ": %s: no arp_interval value specified.\n",
641                        bond->dev->name);
642                 ret = -EINVAL;
643                 goto out;
644         }
645         if (new_value < 0) {
646                 printk(KERN_ERR DRV_NAME
647                        ": %s: Invalid arp_interval value %d not in range 1-%d; rejected.\n",
648                        bond->dev->name, new_value, INT_MAX);
649                 ret = -EINVAL;
650                 goto out;
651         }
652
653         printk(KERN_INFO DRV_NAME
654                ": %s: Setting ARP monitoring interval to %d.\n",
655                bond->dev->name, new_value);
656         bond->params.arp_interval = new_value;
657         if (bond->params.miimon) {
658                 printk(KERN_INFO DRV_NAME
659                        ": %s: ARP monitoring cannot be used with MII monitoring. "
660                        "%s Disabling MII monitoring.\n",
661                        bond->dev->name, bond->dev->name);
662                 bond->params.miimon = 0;
663                 if (delayed_work_pending(&bond->mii_work)) {
664                         cancel_delayed_work(&bond->mii_work);
665                         flush_workqueue(bond->wq);
666                 }
667         }
668         if (!bond->params.arp_targets[0]) {
669                 printk(KERN_INFO DRV_NAME
670                        ": %s: ARP monitoring has been set up, "
671                        "but no ARP targets have been specified.\n",
672                        bond->dev->name);
673         }
674         if (bond->dev->flags & IFF_UP) {
675                 /* If the interface is up, we may need to fire off
676                  * the ARP timer.  If the interface is down, the
677                  * timer will get fired off when the open function
678                  * is called.
679                  */
680                 if (!delayed_work_pending(&bond->arp_work)) {
681                         if (bond->params.mode == BOND_MODE_ACTIVEBACKUP)
682                                 INIT_DELAYED_WORK(&bond->arp_work,
683                                                   bond_activebackup_arp_mon);
684                         else
685                                 INIT_DELAYED_WORK(&bond->arp_work,
686                                                   bond_loadbalance_arp_mon);
687
688                         queue_delayed_work(bond->wq, &bond->arp_work, 0);
689                 }
690         }
691
692 out:
693         return ret;
694 }
695 static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR , bonding_show_arp_interval, bonding_store_arp_interval);
696
697 /*
698  * Show and set the arp targets.
699  */
700 static ssize_t bonding_show_arp_targets(struct device *d,
701                                         struct device_attribute *attr,
702                                         char *buf)
703 {
704         int i, res = 0;
705         struct bonding *bond = to_bond(d);
706
707         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
708                 if (bond->params.arp_targets[i])
709                         res += sprintf(buf + res, "%u.%u.%u.%u ",
710                                NIPQUAD(bond->params.arp_targets[i]));
711         }
712         if (res) buf[res-1] = '\n'; /* eat the leftover space */
713         return res;
714 }
715
716 static ssize_t bonding_store_arp_targets(struct device *d,
717                                          struct device_attribute *attr,
718                                          const char *buf, size_t count)
719 {
720         __be32 newtarget;
721         int i = 0, done = 0, ret = count;
722         struct bonding *bond = to_bond(d);
723         __be32 *targets;
724
725         targets = bond->params.arp_targets;
726         newtarget = in_aton(buf + 1);
727         /* look for adds */
728         if (buf[0] == '+') {
729                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
730                         printk(KERN_ERR DRV_NAME
731                                ": %s: invalid ARP target %u.%u.%u.%u specified for addition\n",
732                                bond->dev->name, NIPQUAD(newtarget));
733                         ret = -EINVAL;
734                         goto out;
735                 }
736                 /* look for an empty slot to put the target in, and check for dupes */
737                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
738                         if (targets[i] == newtarget) { /* duplicate */
739                                 printk(KERN_ERR DRV_NAME
740                                        ": %s: ARP target %u.%u.%u.%u is already present\n",
741                                        bond->dev->name, NIPQUAD(newtarget));
742                                 if (done)
743                                         targets[i] = 0;
744                                 ret = -EINVAL;
745                                 goto out;
746                         }
747                         if (targets[i] == 0 && !done) {
748                                 printk(KERN_INFO DRV_NAME
749                                        ": %s: adding ARP target %d.%d.%d.%d.\n",
750                                        bond->dev->name, NIPQUAD(newtarget));
751                                 done = 1;
752                                 targets[i] = newtarget;
753                         }
754                 }
755                 if (!done) {
756                         printk(KERN_ERR DRV_NAME
757                                ": %s: ARP target table is full!\n",
758                                bond->dev->name);
759                         ret = -EINVAL;
760                         goto out;
761                 }
762
763         }
764         else if (buf[0] == '-') {
765                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
766                         printk(KERN_ERR DRV_NAME
767                                ": %s: invalid ARP target %d.%d.%d.%d specified for removal\n",
768                                bond->dev->name, NIPQUAD(newtarget));
769                         ret = -EINVAL;
770                         goto out;
771                 }
772
773                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
774                         if (targets[i] == newtarget) {
775                                 printk(KERN_INFO DRV_NAME
776                                        ": %s: removing ARP target %d.%d.%d.%d.\n",
777                                        bond->dev->name, NIPQUAD(newtarget));
778                                 targets[i] = 0;
779                                 done = 1;
780                         }
781                 }
782                 if (!done) {
783                         printk(KERN_INFO DRV_NAME
784                                ": %s: unable to remove nonexistent ARP target %d.%d.%d.%d.\n",
785                                bond->dev->name, NIPQUAD(newtarget));
786                         ret = -EINVAL;
787                         goto out;
788                 }
789         }
790         else {
791                 printk(KERN_ERR DRV_NAME ": no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
792                         bond->dev->name);
793                 ret = -EPERM;
794                 goto out;
795         }
796
797 out:
798         return ret;
799 }
800 static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
801
802 /*
803  * Show and set the up and down delays.  These must be multiples of the
804  * MII monitoring value, and are stored internally as the multiplier.
805  * Thus, we must translate to MS for the real world.
806  */
807 static ssize_t bonding_show_downdelay(struct device *d,
808                                       struct device_attribute *attr,
809                                       char *buf)
810 {
811         struct bonding *bond = to_bond(d);
812
813         return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
814 }
815
816 static ssize_t bonding_store_downdelay(struct device *d,
817                                        struct device_attribute *attr,
818                                        const char *buf, size_t count)
819 {
820         int new_value, ret = count;
821         struct bonding *bond = to_bond(d);
822
823         if (!(bond->params.miimon)) {
824                 printk(KERN_ERR DRV_NAME
825                        ": %s: Unable to set down delay as MII monitoring is disabled\n",
826                        bond->dev->name);
827                 ret = -EPERM;
828                 goto out;
829         }
830
831         if (sscanf(buf, "%d", &new_value) != 1) {
832                 printk(KERN_ERR DRV_NAME
833                        ": %s: no down delay value specified.\n",
834                        bond->dev->name);
835                 ret = -EINVAL;
836                 goto out;
837         }
838         if (new_value < 0) {
839                 printk(KERN_ERR DRV_NAME
840                        ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
841                        bond->dev->name, new_value, 1, INT_MAX);
842                 ret = -EINVAL;
843                 goto out;
844         } else {
845                 if ((new_value % bond->params.miimon) != 0) {
846                         printk(KERN_WARNING DRV_NAME
847                                ": %s: Warning: down delay (%d) is not a multiple "
848                                "of miimon (%d), delay rounded to %d ms\n",
849                                bond->dev->name, new_value, bond->params.miimon,
850                                (new_value / bond->params.miimon) *
851                                bond->params.miimon);
852                 }
853                 bond->params.downdelay = new_value / bond->params.miimon;
854                 printk(KERN_INFO DRV_NAME ": %s: Setting down delay to %d.\n",
855                        bond->dev->name, bond->params.downdelay * bond->params.miimon);
856
857         }
858
859 out:
860         return ret;
861 }
862 static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR , bonding_show_downdelay, bonding_store_downdelay);
863
864 static ssize_t bonding_show_updelay(struct device *d,
865                                     struct device_attribute *attr,
866                                     char *buf)
867 {
868         struct bonding *bond = to_bond(d);
869
870         return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
871
872 }
873
874 static ssize_t bonding_store_updelay(struct device *d,
875                                      struct device_attribute *attr,
876                                      const char *buf, size_t count)
877 {
878         int new_value, ret = count;
879         struct bonding *bond = to_bond(d);
880
881         if (!(bond->params.miimon)) {
882                 printk(KERN_ERR DRV_NAME
883                        ": %s: Unable to set up delay as MII monitoring is disabled\n",
884                        bond->dev->name);
885                 ret = -EPERM;
886                 goto out;
887         }
888
889         if (sscanf(buf, "%d", &new_value) != 1) {
890                 printk(KERN_ERR DRV_NAME
891                        ": %s: no up delay value specified.\n",
892                        bond->dev->name);
893                 ret = -EINVAL;
894                 goto out;
895         }
896         if (new_value < 0) {
897                 printk(KERN_ERR DRV_NAME
898                        ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
899                        bond->dev->name, new_value, 1, INT_MAX);
900                 ret = -EINVAL;
901                 goto out;
902         } else {
903                 if ((new_value % bond->params.miimon) != 0) {
904                         printk(KERN_WARNING DRV_NAME
905                                ": %s: Warning: up delay (%d) is not a multiple "
906                                "of miimon (%d), updelay rounded to %d ms\n",
907                                bond->dev->name, new_value, bond->params.miimon,
908                                (new_value / bond->params.miimon) *
909                                bond->params.miimon);
910                 }
911                 bond->params.updelay = new_value / bond->params.miimon;
912                 printk(KERN_INFO DRV_NAME ": %s: Setting up delay to %d.\n",
913                        bond->dev->name, bond->params.updelay * bond->params.miimon);
914
915         }
916
917 out:
918         return ret;
919 }
920 static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR , bonding_show_updelay, bonding_store_updelay);
921
922 /*
923  * Show and set the LACP interval.  Interface must be down, and the mode
924  * must be set to 802.3ad mode.
925  */
926 static ssize_t bonding_show_lacp(struct device *d,
927                                  struct device_attribute *attr,
928                                  char *buf)
929 {
930         struct bonding *bond = to_bond(d);
931
932         return sprintf(buf, "%s %d\n",
933                 bond_lacp_tbl[bond->params.lacp_fast].modename,
934                 bond->params.lacp_fast);
935 }
936
937 static ssize_t bonding_store_lacp(struct device *d,
938                                   struct device_attribute *attr,
939                                   const char *buf, size_t count)
940 {
941         int new_value, ret = count;
942         struct bonding *bond = to_bond(d);
943
944         if (bond->dev->flags & IFF_UP) {
945                 printk(KERN_ERR DRV_NAME
946                        ": %s: Unable to update LACP rate because interface is up.\n",
947                        bond->dev->name);
948                 ret = -EPERM;
949                 goto out;
950         }
951
952         if (bond->params.mode != BOND_MODE_8023AD) {
953                 printk(KERN_ERR DRV_NAME
954                        ": %s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
955                        bond->dev->name);
956                 ret = -EPERM;
957                 goto out;
958         }
959
960         new_value = bond_parse_parm((char *)buf, bond_lacp_tbl);
961
962         if ((new_value == 1) || (new_value == 0)) {
963                 bond->params.lacp_fast = new_value;
964                 printk(KERN_INFO DRV_NAME
965                        ": %s: Setting LACP rate to %s (%d).\n",
966                        bond->dev->name, bond_lacp_tbl[new_value].modename, new_value);
967         } else {
968                 printk(KERN_ERR DRV_NAME
969                        ": %s: Ignoring invalid LACP rate value %.*s.\n",
970                         bond->dev->name, (int)strlen(buf) - 1, buf);
971                 ret = -EINVAL;
972         }
973 out:
974         return ret;
975 }
976 static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR, bonding_show_lacp, bonding_store_lacp);
977
978 /*
979  * Show and set the MII monitor interval.  There are two tricky bits
980  * here.  First, if MII monitoring is activated, then we must disable
981  * ARP monitoring.  Second, if the timer isn't running, we must
982  * start it.
983  */
984 static ssize_t bonding_show_miimon(struct device *d,
985                                    struct device_attribute *attr,
986                                    char *buf)
987 {
988         struct bonding *bond = to_bond(d);
989
990         return sprintf(buf, "%d\n", bond->params.miimon);
991 }
992
993 static ssize_t bonding_store_miimon(struct device *d,
994                                     struct device_attribute *attr,
995                                     const char *buf, size_t count)
996 {
997         int new_value, ret = count;
998         struct bonding *bond = to_bond(d);
999
1000         if (sscanf(buf, "%d", &new_value) != 1) {
1001                 printk(KERN_ERR DRV_NAME
1002                        ": %s: no miimon value specified.\n",
1003                        bond->dev->name);
1004                 ret = -EINVAL;
1005                 goto out;
1006         }
1007         if (new_value < 0) {
1008                 printk(KERN_ERR DRV_NAME
1009                        ": %s: Invalid miimon value %d not in range %d-%d; rejected.\n",
1010                        bond->dev->name, new_value, 1, INT_MAX);
1011                 ret = -EINVAL;
1012                 goto out;
1013         } else {
1014                 printk(KERN_INFO DRV_NAME
1015                        ": %s: Setting MII monitoring interval to %d.\n",
1016                        bond->dev->name, new_value);
1017                 bond->params.miimon = new_value;
1018                 if(bond->params.updelay)
1019                         printk(KERN_INFO DRV_NAME
1020                               ": %s: Note: Updating updelay (to %d) "
1021                               "since it is a multiple of the miimon value.\n",
1022                               bond->dev->name,
1023                               bond->params.updelay * bond->params.miimon);
1024                 if(bond->params.downdelay)
1025                         printk(KERN_INFO DRV_NAME
1026                               ": %s: Note: Updating downdelay (to %d) "
1027                               "since it is a multiple of the miimon value.\n",
1028                               bond->dev->name,
1029                               bond->params.downdelay * bond->params.miimon);
1030                 if (bond->params.arp_interval) {
1031                         printk(KERN_INFO DRV_NAME
1032                                ": %s: MII monitoring cannot be used with "
1033                                "ARP monitoring. Disabling ARP monitoring...\n",
1034                                bond->dev->name);
1035                         bond->params.arp_interval = 0;
1036                         if (bond->params.arp_validate) {
1037                                 bond_unregister_arp(bond);
1038                                 bond->params.arp_validate =
1039                                         BOND_ARP_VALIDATE_NONE;
1040                         }
1041                         if (delayed_work_pending(&bond->arp_work)) {
1042                                 cancel_delayed_work(&bond->arp_work);
1043                                 flush_workqueue(bond->wq);
1044                         }
1045                 }
1046
1047                 if (bond->dev->flags & IFF_UP) {
1048                         /* If the interface is up, we may need to fire off
1049                          * the MII timer. If the interface is down, the
1050                          * timer will get fired off when the open function
1051                          * is called.
1052                          */
1053                         if (!delayed_work_pending(&bond->mii_work)) {
1054                                 INIT_DELAYED_WORK(&bond->mii_work,
1055                                                   bond_mii_monitor);
1056                                 queue_delayed_work(bond->wq,
1057                                                    &bond->mii_work, 0);
1058                         }
1059                 }
1060         }
1061 out:
1062         return ret;
1063 }
1064 static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR, bonding_show_miimon, bonding_store_miimon);
1065
1066 /*
1067  * Show and set the primary slave.  The store function is much
1068  * simpler than bonding_store_slaves function because it only needs to
1069  * handle one interface name.
1070  * The bond must be a mode that supports a primary for this be
1071  * set.
1072  */
1073 static ssize_t bonding_show_primary(struct device *d,
1074                                     struct device_attribute *attr,
1075                                     char *buf)
1076 {
1077         int count = 0;
1078         struct bonding *bond = to_bond(d);
1079
1080         if (bond->primary_slave)
1081                 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);
1082         else
1083                 count = sprintf(buf, "\n");
1084
1085         return count;
1086 }
1087
1088 static ssize_t bonding_store_primary(struct device *d,
1089                                      struct device_attribute *attr,
1090                                      const char *buf, size_t count)
1091 {
1092         int i;
1093         struct slave *slave;
1094         struct bonding *bond = to_bond(d);
1095
1096         write_lock_bh(&bond->lock);
1097         if (!USES_PRIMARY(bond->params.mode)) {
1098                 printk(KERN_INFO DRV_NAME
1099                        ": %s: Unable to set primary slave; %s is in mode %d\n",
1100                        bond->dev->name, bond->dev->name, bond->params.mode);
1101         } else {
1102                 bond_for_each_slave(bond, slave, i) {
1103                         if (strnicmp
1104                             (slave->dev->name, buf,
1105                              strlen(slave->dev->name)) == 0) {
1106                                 printk(KERN_INFO DRV_NAME
1107                                        ": %s: Setting %s as primary slave.\n",
1108                                        bond->dev->name, slave->dev->name);
1109                                 bond->primary_slave = slave;
1110                                 bond_select_active_slave(bond);
1111                                 goto out;
1112                         }
1113                 }
1114
1115                 /* if we got here, then we didn't match the name of any slave */
1116
1117                 if (strlen(buf) == 0 || buf[0] == '\n') {
1118                         printk(KERN_INFO DRV_NAME
1119                                ": %s: Setting primary slave to None.\n",
1120                                bond->dev->name);
1121                         bond->primary_slave = NULL;
1122                                 bond_select_active_slave(bond);
1123                 } else {
1124                         printk(KERN_INFO DRV_NAME
1125                                ": %s: Unable to set %.*s as primary slave as it is not a slave.\n",
1126                                bond->dev->name, (int)strlen(buf) - 1, buf);
1127                 }
1128         }
1129 out:
1130         write_unlock_bh(&bond->lock);
1131
1132         rtnl_unlock();
1133
1134         return count;
1135 }
1136 static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR, bonding_show_primary, bonding_store_primary);
1137
1138 /*
1139  * Show and set the use_carrier flag.
1140  */
1141 static ssize_t bonding_show_carrier(struct device *d,
1142                                     struct device_attribute *attr,
1143                                     char *buf)
1144 {
1145         struct bonding *bond = to_bond(d);
1146
1147         return sprintf(buf, "%d\n", bond->params.use_carrier);
1148 }
1149
1150 static ssize_t bonding_store_carrier(struct device *d,
1151                                      struct device_attribute *attr,
1152                                      const char *buf, size_t count)
1153 {
1154         int new_value, ret = count;
1155         struct bonding *bond = to_bond(d);
1156
1157
1158         if (sscanf(buf, "%d", &new_value) != 1) {
1159                 printk(KERN_ERR DRV_NAME
1160                        ": %s: no use_carrier value specified.\n",
1161                        bond->dev->name);
1162                 ret = -EINVAL;
1163                 goto out;
1164         }
1165         if ((new_value == 0) || (new_value == 1)) {
1166                 bond->params.use_carrier = new_value;
1167                 printk(KERN_INFO DRV_NAME ": %s: Setting use_carrier to %d.\n",
1168                        bond->dev->name, new_value);
1169         } else {
1170                 printk(KERN_INFO DRV_NAME
1171                        ": %s: Ignoring invalid use_carrier value %d.\n",
1172                        bond->dev->name, new_value);
1173         }
1174 out:
1175         return count;
1176 }
1177 static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR, bonding_show_carrier, bonding_store_carrier);
1178
1179
1180 /*
1181  * Show and set currently active_slave.
1182  */
1183 static ssize_t bonding_show_active_slave(struct device *d,
1184                                          struct device_attribute *attr,
1185                                          char *buf)
1186 {
1187         struct slave *curr;
1188         struct bonding *bond = to_bond(d);
1189         int count;
1190
1191         read_lock(&bond->curr_slave_lock);
1192         curr = bond->curr_active_slave;
1193         read_unlock(&bond->curr_slave_lock);
1194
1195         if (USES_PRIMARY(bond->params.mode) && curr)
1196                 count = sprintf(buf, "%s\n", curr->dev->name);
1197         else
1198                 count = sprintf(buf, "\n");
1199         return count;
1200 }
1201
1202 static ssize_t bonding_store_active_slave(struct device *d,
1203                                           struct device_attribute *attr,
1204                                           const char *buf, size_t count)
1205 {
1206         int i;
1207         struct slave *slave;
1208         struct slave *old_active = NULL;
1209         struct slave *new_active = NULL;
1210         struct bonding *bond = to_bond(d);
1211
1212         rtnl_lock();
1213         write_lock_bh(&bond->lock);
1214
1215         if (!USES_PRIMARY(bond->params.mode)) {
1216                 printk(KERN_INFO DRV_NAME
1217                        ": %s: Unable to change active slave; %s is in mode %d\n",
1218                        bond->dev->name, bond->dev->name, bond->params.mode);
1219         } else {
1220                 bond_for_each_slave(bond, slave, i) {
1221                         if (strnicmp
1222                             (slave->dev->name, buf,
1223                              strlen(slave->dev->name)) == 0) {
1224                                 old_active = bond->curr_active_slave;
1225                                 new_active = slave;
1226                                 if (new_active == old_active) {
1227                                         /* do nothing */
1228                                         printk(KERN_INFO DRV_NAME
1229                                                ": %s: %s is already the current active slave.\n",
1230                                                bond->dev->name, slave->dev->name);
1231                                         goto out;
1232                                 }
1233                                 else {
1234                                         if ((new_active) &&
1235                                             (old_active) &&
1236                                             (new_active->link == BOND_LINK_UP) &&
1237                                             IS_UP(new_active->dev)) {
1238                                                 printk(KERN_INFO DRV_NAME
1239                                                       ": %s: Setting %s as active slave.\n",
1240                                                       bond->dev->name, slave->dev->name);
1241                                                 bond_change_active_slave(bond, new_active);
1242                                         }
1243                                         else {
1244                                                 printk(KERN_INFO DRV_NAME
1245                                                       ": %s: Could not set %s as active slave; "
1246                                                       "either %s is down or the link is down.\n",
1247                                                       bond->dev->name, slave->dev->name,
1248                                                       slave->dev->name);
1249                                         }
1250                                         goto out;
1251                                 }
1252                         }
1253                 }
1254
1255                 /* if we got here, then we didn't match the name of any slave */
1256
1257                 if (strlen(buf) == 0 || buf[0] == '\n') {
1258                         printk(KERN_INFO DRV_NAME
1259                                ": %s: Setting active slave to None.\n",
1260                                bond->dev->name);
1261                         bond->primary_slave = NULL;
1262                                 bond_select_active_slave(bond);
1263                 } else {
1264                         printk(KERN_INFO DRV_NAME
1265                                ": %s: Unable to set %.*s as active slave as it is not a slave.\n",
1266                                bond->dev->name, (int)strlen(buf) - 1, buf);
1267                 }
1268         }
1269 out:
1270         write_unlock_bh(&bond->lock);
1271         rtnl_unlock();
1272
1273         return count;
1274
1275 }
1276 static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR, bonding_show_active_slave, bonding_store_active_slave);
1277
1278
1279 /*
1280  * Show link status of the bond interface.
1281  */
1282 static ssize_t bonding_show_mii_status(struct device *d,
1283                                        struct device_attribute *attr,
1284                                        char *buf)
1285 {
1286         struct slave *curr;
1287         struct bonding *bond = to_bond(d);
1288
1289         read_lock(&bond->curr_slave_lock);
1290         curr = bond->curr_active_slave;
1291         read_unlock(&bond->curr_slave_lock);
1292
1293         return sprintf(buf, "%s\n", (curr) ? "up" : "down");
1294 }
1295 static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1296
1297
1298 /*
1299  * Show current 802.3ad aggregator ID.
1300  */
1301 static ssize_t bonding_show_ad_aggregator(struct device *d,
1302                                           struct device_attribute *attr,
1303                                           char *buf)
1304 {
1305         int count = 0;
1306         struct bonding *bond = to_bond(d);
1307
1308         if (bond->params.mode == BOND_MODE_8023AD) {
1309                 struct ad_info ad_info;
1310                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.aggregator_id);
1311         }
1312         else
1313                 count = sprintf(buf, "\n");
1314
1315         return count;
1316 }
1317 static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1318
1319
1320 /*
1321  * Show number of active 802.3ad ports.
1322  */
1323 static ssize_t bonding_show_ad_num_ports(struct device *d,
1324                                          struct device_attribute *attr,
1325                                          char *buf)
1326 {
1327         int count = 0;
1328         struct bonding *bond = to_bond(d);
1329
1330         if (bond->params.mode == BOND_MODE_8023AD) {
1331                 struct ad_info ad_info;
1332                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0: ad_info.ports);
1333         }
1334         else
1335                 count = sprintf(buf, "\n");
1336
1337         return count;
1338 }
1339 static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1340
1341
1342 /*
1343  * Show current 802.3ad actor key.
1344  */
1345 static ssize_t bonding_show_ad_actor_key(struct device *d,
1346                                          struct device_attribute *attr,
1347                                          char *buf)
1348 {
1349         int count = 0;
1350         struct bonding *bond = to_bond(d);
1351
1352         if (bond->params.mode == BOND_MODE_8023AD) {
1353                 struct ad_info ad_info;
1354                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.actor_key);
1355         }
1356         else
1357                 count = sprintf(buf, "\n");
1358
1359         return count;
1360 }
1361 static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1362
1363
1364 /*
1365  * Show current 802.3ad partner key.
1366  */
1367 static ssize_t bonding_show_ad_partner_key(struct device *d,
1368                                            struct device_attribute *attr,
1369                                            char *buf)
1370 {
1371         int count = 0;
1372         struct bonding *bond = to_bond(d);
1373
1374         if (bond->params.mode == BOND_MODE_8023AD) {
1375                 struct ad_info ad_info;
1376                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.partner_key);
1377         }
1378         else
1379                 count = sprintf(buf, "\n");
1380
1381         return count;
1382 }
1383 static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1384
1385
1386 /*
1387  * Show current 802.3ad partner mac.
1388  */
1389 static ssize_t bonding_show_ad_partner_mac(struct device *d,
1390                                            struct device_attribute *attr,
1391                                            char *buf)
1392 {
1393         int count = 0;
1394         struct bonding *bond = to_bond(d);
1395         DECLARE_MAC_BUF(mac);
1396
1397         if (bond->params.mode == BOND_MODE_8023AD) {
1398                 struct ad_info ad_info;
1399                 if (!bond_3ad_get_active_agg_info(bond, &ad_info)) {
1400                         count = sprintf(buf,"%s\n",
1401                                         print_mac(mac, ad_info.partner_system));
1402                 }
1403         }
1404         else
1405                 count = sprintf(buf, "\n");
1406
1407         return count;
1408 }
1409 static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1410
1411
1412
1413 static struct attribute *per_bond_attrs[] = {
1414         &dev_attr_slaves.attr,
1415         &dev_attr_mode.attr,
1416         &dev_attr_fail_over_mac.attr,
1417         &dev_attr_arp_validate.attr,
1418         &dev_attr_arp_interval.attr,
1419         &dev_attr_arp_ip_target.attr,
1420         &dev_attr_downdelay.attr,
1421         &dev_attr_updelay.attr,
1422         &dev_attr_lacp_rate.attr,
1423         &dev_attr_xmit_hash_policy.attr,
1424         &dev_attr_miimon.attr,
1425         &dev_attr_primary.attr,
1426         &dev_attr_use_carrier.attr,
1427         &dev_attr_active_slave.attr,
1428         &dev_attr_mii_status.attr,
1429         &dev_attr_ad_aggregator.attr,
1430         &dev_attr_ad_num_ports.attr,
1431         &dev_attr_ad_actor_key.attr,
1432         &dev_attr_ad_partner_key.attr,
1433         &dev_attr_ad_partner_mac.attr,
1434         NULL,
1435 };
1436
1437 static struct attribute_group bonding_group = {
1438         .name = "bonding",
1439         .attrs = per_bond_attrs,
1440 };
1441
1442 /*
1443  * Initialize sysfs.  This sets up the bonding_masters file in
1444  * /sys/class/net.
1445  */
1446 int bond_create_sysfs(void)
1447 {
1448         int ret = 0;
1449         struct bonding *firstbond;
1450
1451         init_rwsem(&bonding_rwsem);
1452
1453         /* get the netdev class pointer */
1454         firstbond = container_of(bond_dev_list.next, struct bonding, bond_list);
1455         if (!firstbond)
1456                 return -ENODEV;
1457
1458         netdev_class = firstbond->dev->dev.class;
1459         if (!netdev_class)
1460                 return -ENODEV;
1461
1462         ret = class_create_file(netdev_class, &class_attr_bonding_masters);
1463         /*
1464          * Permit multiple loads of the module by ignoring failures to
1465          * create the bonding_masters sysfs file.  Bonding devices
1466          * created by second or subsequent loads of the module will
1467          * not be listed in, or controllable by, bonding_masters, but
1468          * will have the usual "bonding" sysfs directory.
1469          *
1470          * This is done to preserve backwards compatibility for
1471          * initscripts/sysconfig, which load bonding multiple times to
1472          * configure multiple bonding devices.
1473          */
1474         if (ret == -EEXIST) {
1475                 netdev_class = NULL;
1476                 return 0;
1477         }
1478
1479         return ret;
1480
1481 }
1482
1483 /*
1484  * Remove /sys/class/net/bonding_masters.
1485  */
1486 void bond_destroy_sysfs(void)
1487 {
1488         if (netdev_class)
1489                 class_remove_file(netdev_class, &class_attr_bonding_masters);
1490 }
1491
1492 /*
1493  * Initialize sysfs for each bond.  This sets up and registers
1494  * the 'bondctl' directory for each individual bond under /sys/class/net.
1495  */
1496 int bond_create_sysfs_entry(struct bonding *bond)
1497 {
1498         struct net_device *dev = bond->dev;
1499         int err;
1500
1501         err = sysfs_create_group(&(dev->dev.kobj), &bonding_group);
1502         if (err) {
1503                 printk(KERN_EMERG "eek! didn't create group!\n");
1504         }
1505
1506         if (expected_refcount < 1)
1507                 expected_refcount = atomic_read(&bond->dev->dev.kobj.kref.refcount);
1508
1509         return err;
1510 }
1511 /*
1512  * Remove sysfs entries for each bond.
1513  */
1514 void bond_destroy_sysfs_entry(struct bonding *bond)
1515 {
1516         struct net_device *dev = bond->dev;
1517
1518         sysfs_remove_group(&(dev->dev.kobj), &bonding_group);
1519 }
1520