bonding: modify sysfs support to permit multiple loads
[linux-3.10.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/sched.h>
26 #include <linux/device.h>
27 #include <linux/sysdev.h>
28 #include <linux/fs.h>
29 #include <linux/types.h>
30 #include <linux/string.h>
31 #include <linux/netdevice.h>
32 #include <linux/inetdevice.h>
33 #include <linux/in.h>
34 #include <linux/sysfs.h>
35 #include <linux/string.h>
36 #include <linux/ctype.h>
37 #include <linux/inet.h>
38 #include <linux/rtnetlink.h>
39
40 /* #define BONDING_DEBUG 1 */
41 #include "bonding.h"
42 #define to_class_dev(obj) container_of(obj,struct class_device,kobj)
43 #define to_net_dev(class) container_of(class, struct net_device, class_dev)
44 #define to_bond(cd)     ((struct bonding *)(to_net_dev(cd)->priv))
45
46 /*---------------------------- Declarations -------------------------------*/
47
48
49 extern struct list_head bond_dev_list;
50 extern struct bond_params bonding_defaults;
51 extern struct bond_parm_tbl bond_mode_tbl[];
52 extern struct bond_parm_tbl bond_lacp_tbl[];
53 extern struct bond_parm_tbl xmit_hashtype_tbl[];
54 extern struct bond_parm_tbl arp_validate_tbl[];
55
56 static int expected_refcount = -1;
57 static struct class *netdev_class;
58 /*--------------------------- Data Structures -----------------------------*/
59
60 /* Bonding sysfs lock.  Why can't we just use the subsytem lock?
61  * Because kobject_register tries to acquire the subsystem lock.  If
62  * we already hold the lock (which we would if the user was creating
63  * a new bond through the sysfs interface), we deadlock.
64  * This lock is only needed when deleting a bond - we need to make sure
65  * that we don't collide with an ongoing ioctl.
66  */
67
68 struct rw_semaphore bonding_rwsem;
69
70
71
72
73 /*------------------------------ Functions --------------------------------*/
74
75 /*
76  * "show" function for the bond_masters attribute.
77  * The class parameter is ignored.
78  */
79 static ssize_t bonding_show_bonds(struct class *cls, char *buffer)
80 {
81         int res = 0;
82         struct bonding *bond;
83
84         down_read(&(bonding_rwsem));
85
86         list_for_each_entry(bond, &bond_dev_list, bond_list) {
87                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
88                         /* not enough space for another interface name */
89                         if ((PAGE_SIZE - res) > 10)
90                                 res = PAGE_SIZE - 10;
91                         res += sprintf(buffer + res, "++more++");
92                         break;
93                 }
94                 res += sprintf(buffer + res, "%s ",
95                                bond->dev->name);
96         }
97         res += sprintf(buffer + res, "\n");
98         res++;
99         up_read(&(bonding_rwsem));
100         return res;
101 }
102
103 /*
104  * "store" function for the bond_masters attribute.  This is what
105  * creates and deletes entire bonds.
106  *
107  * The class parameter is ignored.
108  *
109  */
110
111 static ssize_t bonding_store_bonds(struct class *cls, const char *buffer, size_t count)
112 {
113         char command[IFNAMSIZ + 1] = {0, };
114         char *ifname;
115         int res = count;
116         struct bonding *bond;
117         struct bonding *nxt;
118
119         down_write(&(bonding_rwsem));
120         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
121         ifname = command + 1;
122         if ((strlen(command) <= 1) ||
123             !dev_valid_name(ifname))
124                 goto err_no_cmd;
125
126         if (command[0] == '+') {
127
128                 /* Check to see if the bond already exists. */
129                 list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list)
130                         if (strnicmp(bond->dev->name, ifname, IFNAMSIZ) == 0) {
131                                 printk(KERN_ERR DRV_NAME
132                                         ": cannot add bond %s; it already exists\n",
133                                         ifname);
134                                 res = -EPERM;
135                                 goto out;
136                         }
137
138                 printk(KERN_INFO DRV_NAME
139                         ": %s is being created...\n", ifname);
140                 if (bond_create(ifname, &bonding_defaults, &bond)) {
141                         printk(KERN_INFO DRV_NAME
142                         ": %s interface already exists. Bond creation failed.\n",
143                         ifname);
144                         res = -EPERM;
145                 }
146                 goto out;
147         }
148
149         if (command[0] == '-') {
150                 list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list)
151                         if (strnicmp(bond->dev->name, ifname, IFNAMSIZ) == 0) {
152                                 rtnl_lock();
153                                 /* check the ref count on the bond's kobject.
154                                  * If it's > expected, then there's a file open,
155                                  * and we have to fail.
156                                  */
157                                 if (atomic_read(&bond->dev->class_dev.kobj.kref.refcount)
158                                                         > expected_refcount){
159                                         rtnl_unlock();
160                                         printk(KERN_INFO DRV_NAME
161                                                 ": Unable remove bond %s due to open references.\n",
162                                                 ifname);
163                                         res = -EPERM;
164                                         goto out;
165                                 }
166                                 printk(KERN_INFO DRV_NAME
167                                         ": %s is being deleted...\n",
168                                         bond->dev->name);
169                                 unregister_netdevice(bond->dev);
170                                 bond_deinit(bond->dev);
171                                 bond_destroy_sysfs_entry(bond);
172                                 rtnl_unlock();
173                                 goto out;
174                         }
175
176                 printk(KERN_ERR DRV_NAME
177                         ": unable to delete non-existent bond %s\n", ifname);
178                 res = -ENODEV;
179                 goto out;
180         }
181
182 err_no_cmd:
183         printk(KERN_ERR DRV_NAME
184                 ": no command found in bonding_masters. Use +ifname or -ifname.\n");
185         res = -EPERM;
186
187         /* Always return either count or an error.  If you return 0, you'll
188          * get called forever, which is bad.
189          */
190 out:
191         up_write(&(bonding_rwsem));
192         return res;
193 }
194 /* class attribute for bond_masters file.  This ends up in /sys/class/net */
195 static CLASS_ATTR(bonding_masters,  S_IWUSR | S_IRUGO,
196                   bonding_show_bonds, bonding_store_bonds);
197
198 int bond_create_slave_symlinks(struct net_device *master, struct net_device *slave)
199 {
200         char linkname[IFNAMSIZ+7];
201         int ret = 0;
202
203         /* first, create a link from the slave back to the master */
204         ret = sysfs_create_link(&(slave->class_dev.kobj), &(master->class_dev.kobj),
205                                 "master");
206         if (ret)
207                 return ret;
208         /* next, create a link from the master to the slave */
209         sprintf(linkname,"slave_%s",slave->name);
210         ret = sysfs_create_link(&(master->class_dev.kobj), &(slave->class_dev.kobj),
211                                 linkname);
212         return ret;
213
214 }
215
216 void bond_destroy_slave_symlinks(struct net_device *master, struct net_device *slave)
217 {
218         char linkname[IFNAMSIZ+7];
219
220         sysfs_remove_link(&(slave->class_dev.kobj), "master");
221         sprintf(linkname,"slave_%s",slave->name);
222         sysfs_remove_link(&(master->class_dev.kobj), linkname);
223 }
224
225
226 /*
227  * Show the slaves in the current bond.
228  */
229 static ssize_t bonding_show_slaves(struct class_device *cd, char *buf)
230 {
231         struct slave *slave;
232         int i, res = 0;
233         struct bonding *bond = to_bond(cd);
234
235         read_lock_bh(&bond->lock);
236         bond_for_each_slave(bond, slave, i) {
237                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
238                         /* not enough space for another interface name */
239                         if ((PAGE_SIZE - res) > 10)
240                                 res = PAGE_SIZE - 10;
241                         res += sprintf(buf + res, "++more++");
242                         break;
243                 }
244                 res += sprintf(buf + res, "%s ", slave->dev->name);
245         }
246         read_unlock_bh(&bond->lock);
247         res += sprintf(buf + res, "\n");
248         res++;
249         return res;
250 }
251
252 /*
253  * Set the slaves in the current bond.  The bond interface must be
254  * up for this to succeed.
255  * This function is largely the same flow as bonding_update_bonds().
256  */
257 static ssize_t bonding_store_slaves(struct class_device *cd, const char *buffer, size_t count)
258 {
259         char command[IFNAMSIZ + 1] = { 0, };
260         char *ifname;
261         int i, res, found, ret = count;
262         struct slave *slave;
263         struct net_device *dev = NULL;
264         struct bonding *bond = to_bond(cd);
265
266         /* Quick sanity check -- is the bond interface up? */
267         if (!(bond->dev->flags & IFF_UP)) {
268                 printk(KERN_ERR DRV_NAME
269                        ": %s: Unable to update slaves because interface is down.\n",
270                        bond->dev->name);
271                 ret = -EPERM;
272                 goto out;
273         }
274
275         /* Note:  We can't hold bond->lock here, as bond_create grabs it. */
276
277         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
278         ifname = command + 1;
279         if ((strlen(command) <= 1) ||
280             !dev_valid_name(ifname))
281                 goto err_no_cmd;
282
283         if (command[0] == '+') {
284
285                 /* Got a slave name in ifname.  Is it already in the list? */
286                 found = 0;
287                 read_lock_bh(&bond->lock);
288                 bond_for_each_slave(bond, slave, i)
289                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
290                                 printk(KERN_ERR DRV_NAME
291                                        ": %s: Interface %s is already enslaved!\n",
292                                        bond->dev->name, ifname);
293                                 ret = -EPERM;
294                                 read_unlock_bh(&bond->lock);
295                                 goto out;
296                         }
297
298                 read_unlock_bh(&bond->lock);
299                 printk(KERN_INFO DRV_NAME ": %s: Adding slave %s.\n",
300                        bond->dev->name, ifname);
301                 dev = dev_get_by_name(ifname);
302                 if (!dev) {
303                         printk(KERN_INFO DRV_NAME
304                                ": %s: Interface %s does not exist!\n",
305                                bond->dev->name, ifname);
306                         ret = -EPERM;
307                         goto out;
308                 }
309                 else
310                         dev_put(dev);
311
312                 if (dev->flags & IFF_UP) {
313                         printk(KERN_ERR DRV_NAME
314                                ": %s: Error: Unable to enslave %s "
315                                "because it is already up.\n",
316                                bond->dev->name, dev->name);
317                         ret = -EPERM;
318                         goto out;
319                 }
320                 /* If this is the first slave, then we need to set
321                    the master's hardware address to be the same as the
322                    slave's. */
323                 if (!(*((u32 *) & (bond->dev->dev_addr[0])))) {
324                         memcpy(bond->dev->dev_addr, dev->dev_addr,
325                                dev->addr_len);
326                 }
327
328                 /* Set the slave's MTU to match the bond */
329                 if (dev->mtu != bond->dev->mtu) {
330                         if (dev->change_mtu) {
331                                 res = dev->change_mtu(dev,
332                                                       bond->dev->mtu);
333                                 if (res) {
334                                         ret = res;
335                                         goto out;
336                                 }
337                         } else {
338                                 dev->mtu = bond->dev->mtu;
339                         }
340                 }
341                 rtnl_lock();
342                 res = bond_enslave(bond->dev, dev);
343                 rtnl_unlock();
344                 if (res) {
345                         ret = res;
346                 }
347                 goto out;
348         }
349
350         if (command[0] == '-') {
351                 dev = NULL;
352                 bond_for_each_slave(bond, slave, i)
353                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
354                                 dev = slave->dev;
355                                 break;
356                         }
357                 if (dev) {
358                         printk(KERN_INFO DRV_NAME ": %s: Removing slave %s\n",
359                                 bond->dev->name, dev->name);
360                         rtnl_lock();
361                         res = bond_release(bond->dev, dev);
362                         rtnl_unlock();
363                         if (res) {
364                                 ret = res;
365                                 goto out;
366                         }
367                         /* set the slave MTU to the default */
368                         if (dev->change_mtu) {
369                                 dev->change_mtu(dev, 1500);
370                         } else {
371                                 dev->mtu = 1500;
372                         }
373                 }
374                 else {
375                         printk(KERN_ERR DRV_NAME ": unable to remove non-existent slave %s for bond %s.\n",
376                                 ifname, bond->dev->name);
377                         ret = -ENODEV;
378                 }
379                 goto out;
380         }
381
382 err_no_cmd:
383         printk(KERN_ERR DRV_NAME ": no command found in slaves file for bond %s. Use +ifname or -ifname.\n", bond->dev->name);
384         ret = -EPERM;
385
386 out:
387         return ret;
388 }
389
390 static CLASS_DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves, bonding_store_slaves);
391
392 /*
393  * Show and set the bonding mode.  The bond interface must be down to
394  * change the mode.
395  */
396 static ssize_t bonding_show_mode(struct class_device *cd, char *buf)
397 {
398         struct bonding *bond = to_bond(cd);
399
400         return sprintf(buf, "%s %d\n",
401                         bond_mode_tbl[bond->params.mode].modename,
402                         bond->params.mode) + 1;
403 }
404
405 static ssize_t bonding_store_mode(struct class_device *cd, const char *buf, size_t count)
406 {
407         int new_value, ret = count;
408         struct bonding *bond = to_bond(cd);
409
410         if (bond->dev->flags & IFF_UP) {
411                 printk(KERN_ERR DRV_NAME
412                        ": unable to update mode of %s because interface is up.\n",
413                        bond->dev->name);
414                 ret = -EPERM;
415                 goto out;
416         }
417
418         new_value = bond_parse_parm((char *)buf, bond_mode_tbl);
419         if (new_value < 0)  {
420                 printk(KERN_ERR DRV_NAME
421                        ": %s: Ignoring invalid mode value %.*s.\n",
422                        bond->dev->name,
423                        (int)strlen(buf) - 1, buf);
424                 ret = -EINVAL;
425                 goto out;
426         } else {
427                 if (bond->params.mode == BOND_MODE_8023AD)
428                         bond_unset_master_3ad_flags(bond);
429
430                 if (bond->params.mode == BOND_MODE_ALB)
431                         bond_unset_master_alb_flags(bond);
432
433                 bond->params.mode = new_value;
434                 bond_set_mode_ops(bond, bond->params.mode);
435                 printk(KERN_INFO DRV_NAME ": %s: setting mode to %s (%d).\n",
436                         bond->dev->name, bond_mode_tbl[new_value].modename, new_value);
437         }
438 out:
439         return ret;
440 }
441 static CLASS_DEVICE_ATTR(mode, S_IRUGO | S_IWUSR, bonding_show_mode, bonding_store_mode);
442
443 /*
444  * Show and set the bonding transmit hash method.  The bond interface must be down to
445  * change the xmit hash policy.
446  */
447 static ssize_t bonding_show_xmit_hash(struct class_device *cd, char *buf)
448 {
449         int count;
450         struct bonding *bond = to_bond(cd);
451
452         if ((bond->params.mode != BOND_MODE_XOR) &&
453             (bond->params.mode != BOND_MODE_8023AD)) {
454                 // Not Applicable
455                 count = sprintf(buf, "NA\n") + 1;
456         } else {
457                 count = sprintf(buf, "%s %d\n",
458                         xmit_hashtype_tbl[bond->params.xmit_policy].modename,
459                         bond->params.xmit_policy) + 1;
460         }
461
462         return count;
463 }
464
465 static ssize_t bonding_store_xmit_hash(struct class_device *cd, const char *buf, size_t count)
466 {
467         int new_value, ret = count;
468         struct bonding *bond = to_bond(cd);
469
470         if (bond->dev->flags & IFF_UP) {
471                 printk(KERN_ERR DRV_NAME
472                        "%s: Interface is up. Unable to update xmit policy.\n",
473                        bond->dev->name);
474                 ret = -EPERM;
475                 goto out;
476         }
477
478         if ((bond->params.mode != BOND_MODE_XOR) &&
479             (bond->params.mode != BOND_MODE_8023AD)) {
480                 printk(KERN_ERR DRV_NAME
481                        "%s: Transmit hash policy is irrelevant in this mode.\n",
482                        bond->dev->name);
483                 ret = -EPERM;
484                 goto out;
485         }
486
487         new_value = bond_parse_parm((char *)buf, xmit_hashtype_tbl);
488         if (new_value < 0)  {
489                 printk(KERN_ERR DRV_NAME
490                        ": %s: Ignoring invalid xmit hash policy value %.*s.\n",
491                        bond->dev->name,
492                        (int)strlen(buf) - 1, buf);
493                 ret = -EINVAL;
494                 goto out;
495         } else {
496                 bond->params.xmit_policy = new_value;
497                 bond_set_mode_ops(bond, bond->params.mode);
498                 printk(KERN_INFO DRV_NAME ": %s: setting xmit hash policy to %s (%d).\n",
499                         bond->dev->name, xmit_hashtype_tbl[new_value].modename, new_value);
500         }
501 out:
502         return ret;
503 }
504 static CLASS_DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR, bonding_show_xmit_hash, bonding_store_xmit_hash);
505
506 /*
507  * Show and set arp_validate.
508  */
509 static ssize_t bonding_show_arp_validate(struct class_device *cd, char *buf)
510 {
511         struct bonding *bond = to_bond(cd);
512
513         return sprintf(buf, "%s %d\n",
514                        arp_validate_tbl[bond->params.arp_validate].modename,
515                        bond->params.arp_validate) + 1;
516 }
517
518 static ssize_t bonding_store_arp_validate(struct class_device *cd, const char *buf, size_t count)
519 {
520         int new_value;
521         struct bonding *bond = to_bond(cd);
522
523         new_value = bond_parse_parm((char *)buf, arp_validate_tbl);
524         if (new_value < 0) {
525                 printk(KERN_ERR DRV_NAME
526                        ": %s: Ignoring invalid arp_validate value %s\n",
527                        bond->dev->name, buf);
528                 return -EINVAL;
529         }
530         if (new_value && (bond->params.mode != BOND_MODE_ACTIVEBACKUP)) {
531                 printk(KERN_ERR DRV_NAME
532                        ": %s: arp_validate only supported in active-backup mode.\n",
533                        bond->dev->name);
534                 return -EINVAL;
535         }
536         printk(KERN_INFO DRV_NAME ": %s: setting arp_validate to %s (%d).\n",
537                bond->dev->name, arp_validate_tbl[new_value].modename,
538                new_value);
539
540         if (!bond->params.arp_validate && new_value) {
541                 bond_register_arp(bond);
542         } else if (bond->params.arp_validate && !new_value) {
543                 bond_unregister_arp(bond);
544         }
545
546         bond->params.arp_validate = new_value;
547
548         return count;
549 }
550
551 static CLASS_DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate, bonding_store_arp_validate);
552
553 /*
554  * Show and set the arp timer interval.  There are two tricky bits
555  * here.  First, if ARP monitoring is activated, then we must disable
556  * MII monitoring.  Second, if the ARP timer isn't running, we must
557  * start it.
558  */
559 static ssize_t bonding_show_arp_interval(struct class_device *cd, char *buf)
560 {
561         struct bonding *bond = to_bond(cd);
562
563         return sprintf(buf, "%d\n", bond->params.arp_interval) + 1;
564 }
565
566 static ssize_t bonding_store_arp_interval(struct class_device *cd, const char *buf, size_t count)
567 {
568         int new_value, ret = count;
569         struct bonding *bond = to_bond(cd);
570
571         if (sscanf(buf, "%d", &new_value) != 1) {
572                 printk(KERN_ERR DRV_NAME
573                        ": %s: no arp_interval value specified.\n",
574                        bond->dev->name);
575                 ret = -EINVAL;
576                 goto out;
577         }
578         if (new_value < 0) {
579                 printk(KERN_ERR DRV_NAME
580                        ": %s: Invalid arp_interval value %d not in range 1-%d; rejected.\n",
581                        bond->dev->name, new_value, INT_MAX);
582                 ret = -EINVAL;
583                 goto out;
584         }
585
586         printk(KERN_INFO DRV_NAME
587                ": %s: Setting ARP monitoring interval to %d.\n",
588                bond->dev->name, new_value);
589         bond->params.arp_interval = new_value;
590         if (bond->params.miimon) {
591                 printk(KERN_INFO DRV_NAME
592                        ": %s: ARP monitoring cannot be used with MII monitoring. "
593                        "%s Disabling MII monitoring.\n",
594                        bond->dev->name, bond->dev->name);
595                 bond->params.miimon = 0;
596                 /* Kill MII timer, else it brings bond's link down */
597                 if (bond->arp_timer.function) {
598                         printk(KERN_INFO DRV_NAME
599                         ": %s: Kill MII timer, else it brings bond's link down...\n",
600                        bond->dev->name);
601                         del_timer_sync(&bond->mii_timer);
602                 }
603         }
604         if (!bond->params.arp_targets[0]) {
605                 printk(KERN_INFO DRV_NAME
606                        ": %s: ARP monitoring has been set up, "
607                        "but no ARP targets have been specified.\n",
608                        bond->dev->name);
609         }
610         if (bond->dev->flags & IFF_UP) {
611                 /* If the interface is up, we may need to fire off
612                  * the ARP timer.  If the interface is down, the
613                  * timer will get fired off when the open function
614                  * is called.
615                  */
616                 if (bond->arp_timer.function) {
617                         /* The timer's already set up, so fire it off */
618                         mod_timer(&bond->arp_timer, jiffies + 1);
619                 } else {
620                         /* Set up the timer. */
621                         init_timer(&bond->arp_timer);
622                         bond->arp_timer.expires = jiffies + 1;
623                         bond->arp_timer.data =
624                                 (unsigned long) bond->dev;
625                         if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) {
626                                 bond->arp_timer.function =
627                                         (void *)
628                                         &bond_activebackup_arp_mon;
629                         } else {
630                                 bond->arp_timer.function =
631                                         (void *)
632                                         &bond_loadbalance_arp_mon;
633                         }
634                         add_timer(&bond->arp_timer);
635                 }
636         }
637
638 out:
639         return ret;
640 }
641 static CLASS_DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR , bonding_show_arp_interval, bonding_store_arp_interval);
642
643 /*
644  * Show and set the arp targets.
645  */
646 static ssize_t bonding_show_arp_targets(struct class_device *cd, char *buf)
647 {
648         int i, res = 0;
649         struct bonding *bond = to_bond(cd);
650
651         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
652                 if (bond->params.arp_targets[i])
653                         res += sprintf(buf + res, "%u.%u.%u.%u ",
654                                NIPQUAD(bond->params.arp_targets[i]));
655         }
656         if (res)
657                 res--;  /* eat the leftover space */
658         res += sprintf(buf + res, "\n");
659         res++;
660         return res;
661 }
662
663 static ssize_t bonding_store_arp_targets(struct class_device *cd, const char *buf, size_t count)
664 {
665         u32 newtarget;
666         int i = 0, done = 0, ret = count;
667         struct bonding *bond = to_bond(cd);
668         u32 *targets;
669
670         targets = bond->params.arp_targets;
671         newtarget = in_aton(buf + 1);
672         /* look for adds */
673         if (buf[0] == '+') {
674                 if ((newtarget == 0) || (newtarget == INADDR_BROADCAST)) {
675                         printk(KERN_ERR DRV_NAME
676                                ": %s: invalid ARP target %u.%u.%u.%u specified for addition\n",
677                                bond->dev->name, NIPQUAD(newtarget));
678                         ret = -EINVAL;
679                         goto out;
680                 }
681                 /* look for an empty slot to put the target in, and check for dupes */
682                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
683                         if (targets[i] == newtarget) { /* duplicate */
684                                 printk(KERN_ERR DRV_NAME
685                                        ": %s: ARP target %u.%u.%u.%u is already present\n",
686                                        bond->dev->name, NIPQUAD(newtarget));
687                                 if (done)
688                                         targets[i] = 0;
689                                 ret = -EINVAL;
690                                 goto out;
691                         }
692                         if (targets[i] == 0 && !done) {
693                                 printk(KERN_INFO DRV_NAME
694                                        ": %s: adding ARP target %d.%d.%d.%d.\n",
695                                        bond->dev->name, NIPQUAD(newtarget));
696                                 done = 1;
697                                 targets[i] = newtarget;
698                         }
699                 }
700                 if (!done) {
701                         printk(KERN_ERR DRV_NAME
702                                ": %s: ARP target table is full!\n",
703                                bond->dev->name);
704                         ret = -EINVAL;
705                         goto out;
706                 }
707
708         }
709         else if (buf[0] == '-') {
710                 if ((newtarget == 0) || (newtarget == INADDR_BROADCAST)) {
711                         printk(KERN_ERR DRV_NAME
712                                ": %s: invalid ARP target %d.%d.%d.%d specified for removal\n",
713                                bond->dev->name, NIPQUAD(newtarget));
714                         ret = -EINVAL;
715                         goto out;
716                 }
717
718                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
719                         if (targets[i] == newtarget) {
720                                 printk(KERN_INFO DRV_NAME
721                                        ": %s: removing ARP target %d.%d.%d.%d.\n",
722                                        bond->dev->name, NIPQUAD(newtarget));
723                                 targets[i] = 0;
724                                 done = 1;
725                         }
726                 }
727                 if (!done) {
728                         printk(KERN_INFO DRV_NAME
729                                ": %s: unable to remove nonexistent ARP target %d.%d.%d.%d.\n",
730                                bond->dev->name, NIPQUAD(newtarget));
731                         ret = -EINVAL;
732                         goto out;
733                 }
734         }
735         else {
736                 printk(KERN_ERR DRV_NAME ": no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
737                         bond->dev->name);
738                 ret = -EPERM;
739                 goto out;
740         }
741
742 out:
743         return ret;
744 }
745 static CLASS_DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
746
747 /*
748  * Show and set the up and down delays.  These must be multiples of the
749  * MII monitoring value, and are stored internally as the multiplier.
750  * Thus, we must translate to MS for the real world.
751  */
752 static ssize_t bonding_show_downdelay(struct class_device *cd, char *buf)
753 {
754         struct bonding *bond = to_bond(cd);
755
756         return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon) + 1;
757 }
758
759 static ssize_t bonding_store_downdelay(struct class_device *cd, const char *buf, size_t count)
760 {
761         int new_value, ret = count;
762         struct bonding *bond = to_bond(cd);
763
764         if (!(bond->params.miimon)) {
765                 printk(KERN_ERR DRV_NAME
766                        ": %s: Unable to set down delay as MII monitoring is disabled\n",
767                        bond->dev->name);
768                 ret = -EPERM;
769                 goto out;
770         }
771
772         if (sscanf(buf, "%d", &new_value) != 1) {
773                 printk(KERN_ERR DRV_NAME
774                        ": %s: no down delay value specified.\n",
775                        bond->dev->name);
776                 ret = -EINVAL;
777                 goto out;
778         }
779         if (new_value < 0) {
780                 printk(KERN_ERR DRV_NAME
781                        ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
782                        bond->dev->name, new_value, 1, INT_MAX);
783                 ret = -EINVAL;
784                 goto out;
785         } else {
786                 if ((new_value % bond->params.miimon) != 0) {
787                         printk(KERN_WARNING DRV_NAME
788                                ": %s: Warning: down delay (%d) is not a multiple "
789                                "of miimon (%d), delay rounded to %d ms\n",
790                                bond->dev->name, new_value, bond->params.miimon,
791                                (new_value / bond->params.miimon) *
792                                bond->params.miimon);
793                 }
794                 bond->params.downdelay = new_value / bond->params.miimon;
795                 printk(KERN_INFO DRV_NAME ": %s: Setting down delay to %d.\n",
796                        bond->dev->name, bond->params.downdelay * bond->params.miimon);
797
798         }
799
800 out:
801         return ret;
802 }
803 static CLASS_DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR , bonding_show_downdelay, bonding_store_downdelay);
804
805 static ssize_t bonding_show_updelay(struct class_device *cd, char *buf)
806 {
807         struct bonding *bond = to_bond(cd);
808
809         return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon) + 1;
810
811 }
812
813 static ssize_t bonding_store_updelay(struct class_device *cd, const char *buf, size_t count)
814 {
815         int new_value, ret = count;
816         struct bonding *bond = to_bond(cd);
817
818         if (!(bond->params.miimon)) {
819                 printk(KERN_ERR DRV_NAME
820                        ": %s: Unable to set up delay as MII monitoring is disabled\n",
821                        bond->dev->name);
822                 ret = -EPERM;
823                 goto out;
824         }
825
826         if (sscanf(buf, "%d", &new_value) != 1) {
827                 printk(KERN_ERR DRV_NAME
828                        ": %s: no up delay value specified.\n",
829                        bond->dev->name);
830                 ret = -EINVAL;
831                 goto out;
832         }
833         if (new_value < 0) {
834                 printk(KERN_ERR DRV_NAME
835                        ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
836                        bond->dev->name, new_value, 1, INT_MAX);
837                 ret = -EINVAL;
838                 goto out;
839         } else {
840                 if ((new_value % bond->params.miimon) != 0) {
841                         printk(KERN_WARNING DRV_NAME
842                                ": %s: Warning: up delay (%d) is not a multiple "
843                                "of miimon (%d), updelay rounded to %d ms\n",
844                                bond->dev->name, new_value, bond->params.miimon,
845                                (new_value / bond->params.miimon) *
846                                bond->params.miimon);
847                 }
848                 bond->params.updelay = new_value / bond->params.miimon;
849                 printk(KERN_INFO DRV_NAME ": %s: Setting up delay to %d.\n",
850                        bond->dev->name, bond->params.updelay * bond->params.miimon);
851
852         }
853
854 out:
855         return ret;
856 }
857 static CLASS_DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR , bonding_show_updelay, bonding_store_updelay);
858
859 /*
860  * Show and set the LACP interval.  Interface must be down, and the mode
861  * must be set to 802.3ad mode.
862  */
863 static ssize_t bonding_show_lacp(struct class_device *cd, char *buf)
864 {
865         struct bonding *bond = to_bond(cd);
866
867         return sprintf(buf, "%s %d\n",
868                 bond_lacp_tbl[bond->params.lacp_fast].modename,
869                 bond->params.lacp_fast) + 1;
870 }
871
872 static ssize_t bonding_store_lacp(struct class_device *cd, const char *buf, size_t count)
873 {
874         int new_value, ret = count;
875         struct bonding *bond = to_bond(cd);
876
877         if (bond->dev->flags & IFF_UP) {
878                 printk(KERN_ERR DRV_NAME
879                        ": %s: Unable to update LACP rate because interface is up.\n",
880                        bond->dev->name);
881                 ret = -EPERM;
882                 goto out;
883         }
884
885         if (bond->params.mode != BOND_MODE_8023AD) {
886                 printk(KERN_ERR DRV_NAME
887                        ": %s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
888                        bond->dev->name);
889                 ret = -EPERM;
890                 goto out;
891         }
892
893         new_value = bond_parse_parm((char *)buf, bond_lacp_tbl);
894
895         if ((new_value == 1) || (new_value == 0)) {
896                 bond->params.lacp_fast = new_value;
897                 printk(KERN_INFO DRV_NAME
898                        ": %s: Setting LACP rate to %s (%d).\n",
899                        bond->dev->name, bond_lacp_tbl[new_value].modename, new_value);
900         } else {
901                 printk(KERN_ERR DRV_NAME
902                        ": %s: Ignoring invalid LACP rate value %.*s.\n",
903                         bond->dev->name, (int)strlen(buf) - 1, buf);
904                 ret = -EINVAL;
905         }
906 out:
907         return ret;
908 }
909 static CLASS_DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR, bonding_show_lacp, bonding_store_lacp);
910
911 /*
912  * Show and set the MII monitor interval.  There are two tricky bits
913  * here.  First, if MII monitoring is activated, then we must disable
914  * ARP monitoring.  Second, if the timer isn't running, we must
915  * start it.
916  */
917 static ssize_t bonding_show_miimon(struct class_device *cd, char *buf)
918 {
919         struct bonding *bond = to_bond(cd);
920
921         return sprintf(buf, "%d\n", bond->params.miimon) + 1;
922 }
923
924 static ssize_t bonding_store_miimon(struct class_device *cd, const char *buf, size_t count)
925 {
926         int new_value, ret = count;
927         struct bonding *bond = to_bond(cd);
928
929         if (sscanf(buf, "%d", &new_value) != 1) {
930                 printk(KERN_ERR DRV_NAME
931                        ": %s: no miimon value specified.\n",
932                        bond->dev->name);
933                 ret = -EINVAL;
934                 goto out;
935         }
936         if (new_value < 0) {
937                 printk(KERN_ERR DRV_NAME
938                        ": %s: Invalid miimon value %d not in range %d-%d; rejected.\n",
939                        bond->dev->name, new_value, 1, INT_MAX);
940                 ret = -EINVAL;
941                 goto out;
942         } else {
943                 printk(KERN_INFO DRV_NAME
944                        ": %s: Setting MII monitoring interval to %d.\n",
945                        bond->dev->name, new_value);
946                 bond->params.miimon = new_value;
947                 if(bond->params.updelay)
948                         printk(KERN_INFO DRV_NAME
949                               ": %s: Note: Updating updelay (to %d) "
950                               "since it is a multiple of the miimon value.\n",
951                               bond->dev->name,
952                               bond->params.updelay * bond->params.miimon);
953                 if(bond->params.downdelay)
954                         printk(KERN_INFO DRV_NAME
955                               ": %s: Note: Updating downdelay (to %d) "
956                               "since it is a multiple of the miimon value.\n",
957                               bond->dev->name,
958                               bond->params.downdelay * bond->params.miimon);
959                 if (bond->params.arp_interval) {
960                         printk(KERN_INFO DRV_NAME
961                                ": %s: MII monitoring cannot be used with "
962                                "ARP monitoring. Disabling ARP monitoring...\n",
963                                bond->dev->name);
964                         bond->params.arp_interval = 0;
965                         if (bond->params.arp_validate) {
966                                 bond_unregister_arp(bond);
967                                 bond->params.arp_validate =
968                                         BOND_ARP_VALIDATE_NONE;
969                         }
970                         /* Kill ARP timer, else it brings bond's link down */
971                         if (bond->mii_timer.function) {
972                                 printk(KERN_INFO DRV_NAME
973                                 ": %s: Kill ARP timer, else it brings bond's link down...\n",
974                                bond->dev->name);
975                                 del_timer_sync(&bond->arp_timer);
976                         }
977                 }
978
979                 if (bond->dev->flags & IFF_UP) {
980                         /* If the interface is up, we may need to fire off
981                          * the MII timer. If the interface is down, the
982                          * timer will get fired off when the open function
983                          * is called.
984                          */
985                         if (bond->mii_timer.function) {
986                                 /* The timer's already set up, so fire it off */
987                                 mod_timer(&bond->mii_timer, jiffies + 1);
988                         } else {
989                                 /* Set up the timer. */
990                                 init_timer(&bond->mii_timer);
991                                 bond->mii_timer.expires = jiffies + 1;
992                                 bond->mii_timer.data =
993                                         (unsigned long) bond->dev;
994                                 bond->mii_timer.function =
995                                         (void *) &bond_mii_monitor;
996                                 add_timer(&bond->mii_timer);
997                         }
998                 }
999         }
1000 out:
1001         return ret;
1002 }
1003 static CLASS_DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR, bonding_show_miimon, bonding_store_miimon);
1004
1005 /*
1006  * Show and set the primary slave.  The store function is much
1007  * simpler than bonding_store_slaves function because it only needs to
1008  * handle one interface name.
1009  * The bond must be a mode that supports a primary for this be
1010  * set.
1011  */
1012 static ssize_t bonding_show_primary(struct class_device *cd, char *buf)
1013 {
1014         int count = 0;
1015         struct bonding *bond = to_bond(cd);
1016
1017         if (bond->primary_slave)
1018                 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name) + 1;
1019         else
1020                 count = sprintf(buf, "\n") + 1;
1021
1022         return count;
1023 }
1024
1025 static ssize_t bonding_store_primary(struct class_device *cd, const char *buf, size_t count)
1026 {
1027         int i;
1028         struct slave *slave;
1029         struct bonding *bond = to_bond(cd);
1030
1031         write_lock_bh(&bond->lock);
1032         if (!USES_PRIMARY(bond->params.mode)) {
1033                 printk(KERN_INFO DRV_NAME
1034                        ": %s: Unable to set primary slave; %s is in mode %d\n",
1035                        bond->dev->name, bond->dev->name, bond->params.mode);
1036         } else {
1037                 bond_for_each_slave(bond, slave, i) {
1038                         if (strnicmp
1039                             (slave->dev->name, buf,
1040                              strlen(slave->dev->name)) == 0) {
1041                                 printk(KERN_INFO DRV_NAME
1042                                        ": %s: Setting %s as primary slave.\n",
1043                                        bond->dev->name, slave->dev->name);
1044                                 bond->primary_slave = slave;
1045                                 bond_select_active_slave(bond);
1046                                 goto out;
1047                         }
1048                 }
1049
1050                 /* if we got here, then we didn't match the name of any slave */
1051
1052                 if (strlen(buf) == 0 || buf[0] == '\n') {
1053                         printk(KERN_INFO DRV_NAME
1054                                ": %s: Setting primary slave to None.\n",
1055                                bond->dev->name);
1056                         bond->primary_slave = NULL;
1057                                 bond_select_active_slave(bond);
1058                 } else {
1059                         printk(KERN_INFO DRV_NAME
1060                                ": %s: Unable to set %.*s as primary slave as it is not a slave.\n",
1061                                bond->dev->name, (int)strlen(buf) - 1, buf);
1062                 }
1063         }
1064 out:
1065         write_unlock_bh(&bond->lock);
1066         return count;
1067 }
1068 static CLASS_DEVICE_ATTR(primary, S_IRUGO | S_IWUSR, bonding_show_primary, bonding_store_primary);
1069
1070 /*
1071  * Show and set the use_carrier flag.
1072  */
1073 static ssize_t bonding_show_carrier(struct class_device *cd, char *buf)
1074 {
1075         struct bonding *bond = to_bond(cd);
1076
1077         return sprintf(buf, "%d\n", bond->params.use_carrier) + 1;
1078 }
1079
1080 static ssize_t bonding_store_carrier(struct class_device *cd, const char *buf, size_t count)
1081 {
1082         int new_value, ret = count;
1083         struct bonding *bond = to_bond(cd);
1084
1085
1086         if (sscanf(buf, "%d", &new_value) != 1) {
1087                 printk(KERN_ERR DRV_NAME
1088                        ": %s: no use_carrier value specified.\n",
1089                        bond->dev->name);
1090                 ret = -EINVAL;
1091                 goto out;
1092         }
1093         if ((new_value == 0) || (new_value == 1)) {
1094                 bond->params.use_carrier = new_value;
1095                 printk(KERN_INFO DRV_NAME ": %s: Setting use_carrier to %d.\n",
1096                        bond->dev->name, new_value);
1097         } else {
1098                 printk(KERN_INFO DRV_NAME
1099                        ": %s: Ignoring invalid use_carrier value %d.\n",
1100                        bond->dev->name, new_value);
1101         }
1102 out:
1103         return count;
1104 }
1105 static CLASS_DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR, bonding_show_carrier, bonding_store_carrier);
1106
1107
1108 /*
1109  * Show and set currently active_slave.
1110  */
1111 static ssize_t bonding_show_active_slave(struct class_device *cd, char *buf)
1112 {
1113         struct slave *curr;
1114         struct bonding *bond = to_bond(cd);
1115         int count;
1116
1117
1118         read_lock(&bond->curr_slave_lock);
1119         curr = bond->curr_active_slave;
1120         read_unlock(&bond->curr_slave_lock);
1121
1122         if (USES_PRIMARY(bond->params.mode) && curr)
1123                 count = sprintf(buf, "%s\n", curr->dev->name) + 1;
1124         else
1125                 count = sprintf(buf, "\n") + 1;
1126         return count;
1127 }
1128
1129 static ssize_t bonding_store_active_slave(struct class_device *cd, const char *buf, size_t count)
1130 {
1131         int i;
1132         struct slave *slave;
1133         struct slave *old_active = NULL;
1134         struct slave *new_active = NULL;
1135         struct bonding *bond = to_bond(cd);
1136
1137         write_lock_bh(&bond->lock);
1138         if (!USES_PRIMARY(bond->params.mode)) {
1139                 printk(KERN_INFO DRV_NAME
1140                        ": %s: Unable to change active slave; %s is in mode %d\n",
1141                        bond->dev->name, bond->dev->name, bond->params.mode);
1142         } else {
1143                 bond_for_each_slave(bond, slave, i) {
1144                         if (strnicmp
1145                             (slave->dev->name, buf,
1146                              strlen(slave->dev->name)) == 0) {
1147                                 old_active = bond->curr_active_slave;
1148                                 new_active = slave;
1149                                 if (new_active == old_active) {
1150                                         /* do nothing */
1151                                         printk(KERN_INFO DRV_NAME
1152                                                ": %s: %s is already the current active slave.\n",
1153                                                bond->dev->name, slave->dev->name);
1154                                         goto out;
1155                                 }
1156                                 else {
1157                                         if ((new_active) &&
1158                                             (old_active) &&
1159                                             (new_active->link == BOND_LINK_UP) &&
1160                                             IS_UP(new_active->dev)) {
1161                                                 printk(KERN_INFO DRV_NAME
1162                                                       ": %s: Setting %s as active slave.\n",
1163                                                       bond->dev->name, slave->dev->name);
1164                                                 bond_change_active_slave(bond, new_active);
1165                                         }
1166                                         else {
1167                                                 printk(KERN_INFO DRV_NAME
1168                                                       ": %s: Could not set %s as active slave; "
1169                                                       "either %s is down or the link is down.\n",
1170                                                       bond->dev->name, slave->dev->name,
1171                                                       slave->dev->name);
1172                                         }
1173                                         goto out;
1174                                 }
1175                         }
1176                 }
1177
1178                 /* if we got here, then we didn't match the name of any slave */
1179
1180                 if (strlen(buf) == 0 || buf[0] == '\n') {
1181                         printk(KERN_INFO DRV_NAME
1182                                ": %s: Setting active slave to None.\n",
1183                                bond->dev->name);
1184                         bond->primary_slave = NULL;
1185                                 bond_select_active_slave(bond);
1186                 } else {
1187                         printk(KERN_INFO DRV_NAME
1188                                ": %s: Unable to set %.*s as active slave as it is not a slave.\n",
1189                                bond->dev->name, (int)strlen(buf) - 1, buf);
1190                 }
1191         }
1192 out:
1193         write_unlock_bh(&bond->lock);
1194         return count;
1195
1196 }
1197 static CLASS_DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR, bonding_show_active_slave, bonding_store_active_slave);
1198
1199
1200 /*
1201  * Show link status of the bond interface.
1202  */
1203 static ssize_t bonding_show_mii_status(struct class_device *cd, char *buf)
1204 {
1205         struct slave *curr;
1206         struct bonding *bond = to_bond(cd);
1207
1208         read_lock(&bond->curr_slave_lock);
1209         curr = bond->curr_active_slave;
1210         read_unlock(&bond->curr_slave_lock);
1211
1212         return sprintf(buf, "%s\n", (curr) ? "up" : "down") + 1;
1213 }
1214 static CLASS_DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1215
1216
1217 /*
1218  * Show current 802.3ad aggregator ID.
1219  */
1220 static ssize_t bonding_show_ad_aggregator(struct class_device *cd, char *buf)
1221 {
1222         int count = 0;
1223         struct bonding *bond = to_bond(cd);
1224
1225         if (bond->params.mode == BOND_MODE_8023AD) {
1226                 struct ad_info ad_info;
1227                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.aggregator_id) + 1;
1228         }
1229         else
1230                 count = sprintf(buf, "\n") + 1;
1231
1232         return count;
1233 }
1234 static CLASS_DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1235
1236
1237 /*
1238  * Show number of active 802.3ad ports.
1239  */
1240 static ssize_t bonding_show_ad_num_ports(struct class_device *cd, char *buf)
1241 {
1242         int count = 0;
1243         struct bonding *bond = to_bond(cd);
1244
1245         if (bond->params.mode == BOND_MODE_8023AD) {
1246                 struct ad_info ad_info;
1247                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0: ad_info.ports) + 1;
1248         }
1249         else
1250                 count = sprintf(buf, "\n") + 1;
1251
1252         return count;
1253 }
1254 static CLASS_DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1255
1256
1257 /*
1258  * Show current 802.3ad actor key.
1259  */
1260 static ssize_t bonding_show_ad_actor_key(struct class_device *cd, char *buf)
1261 {
1262         int count = 0;
1263         struct bonding *bond = to_bond(cd);
1264
1265         if (bond->params.mode == BOND_MODE_8023AD) {
1266                 struct ad_info ad_info;
1267                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.actor_key) + 1;
1268         }
1269         else
1270                 count = sprintf(buf, "\n") + 1;
1271
1272         return count;
1273 }
1274 static CLASS_DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1275
1276
1277 /*
1278  * Show current 802.3ad partner key.
1279  */
1280 static ssize_t bonding_show_ad_partner_key(struct class_device *cd, char *buf)
1281 {
1282         int count = 0;
1283         struct bonding *bond = to_bond(cd);
1284
1285         if (bond->params.mode == BOND_MODE_8023AD) {
1286                 struct ad_info ad_info;
1287                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.partner_key) + 1;
1288         }
1289         else
1290                 count = sprintf(buf, "\n") + 1;
1291
1292         return count;
1293 }
1294 static CLASS_DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1295
1296
1297 /*
1298  * Show current 802.3ad partner mac.
1299  */
1300 static ssize_t bonding_show_ad_partner_mac(struct class_device *cd, char *buf)
1301 {
1302         int count = 0;
1303         struct bonding *bond = to_bond(cd);
1304
1305         if (bond->params.mode == BOND_MODE_8023AD) {
1306                 struct ad_info ad_info;
1307                 if (!bond_3ad_get_active_agg_info(bond, &ad_info)) {
1308                         count = sprintf(buf,"%02x:%02x:%02x:%02x:%02x:%02x\n",
1309                                        ad_info.partner_system[0],
1310                                        ad_info.partner_system[1],
1311                                        ad_info.partner_system[2],
1312                                        ad_info.partner_system[3],
1313                                        ad_info.partner_system[4],
1314                                        ad_info.partner_system[5]) + 1;
1315                 }
1316         }
1317         else
1318                 count = sprintf(buf, "\n") + 1;
1319
1320         return count;
1321 }
1322 static CLASS_DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1323
1324
1325
1326 static struct attribute *per_bond_attrs[] = {
1327         &class_device_attr_slaves.attr,
1328         &class_device_attr_mode.attr,
1329         &class_device_attr_arp_validate.attr,
1330         &class_device_attr_arp_interval.attr,
1331         &class_device_attr_arp_ip_target.attr,
1332         &class_device_attr_downdelay.attr,
1333         &class_device_attr_updelay.attr,
1334         &class_device_attr_lacp_rate.attr,
1335         &class_device_attr_xmit_hash_policy.attr,
1336         &class_device_attr_miimon.attr,
1337         &class_device_attr_primary.attr,
1338         &class_device_attr_use_carrier.attr,
1339         &class_device_attr_active_slave.attr,
1340         &class_device_attr_mii_status.attr,
1341         &class_device_attr_ad_aggregator.attr,
1342         &class_device_attr_ad_num_ports.attr,
1343         &class_device_attr_ad_actor_key.attr,
1344         &class_device_attr_ad_partner_key.attr,
1345         &class_device_attr_ad_partner_mac.attr,
1346         NULL,
1347 };
1348
1349 static struct attribute_group bonding_group = {
1350         .name = "bonding",
1351         .attrs = per_bond_attrs,
1352 };
1353
1354 /*
1355  * Initialize sysfs.  This sets up the bonding_masters file in
1356  * /sys/class/net.
1357  */
1358 int bond_create_sysfs(void)
1359 {
1360         int ret = 0;
1361         struct bonding *firstbond;
1362
1363         init_rwsem(&bonding_rwsem);
1364
1365         /* get the netdev class pointer */
1366         firstbond = container_of(bond_dev_list.next, struct bonding, bond_list);
1367         if (!firstbond)
1368                 return -ENODEV;
1369
1370         netdev_class = firstbond->dev->class_dev.class;
1371         if (!netdev_class)
1372                 return -ENODEV;
1373
1374         ret = class_create_file(netdev_class, &class_attr_bonding_masters);
1375         /*
1376          * Permit multiple loads of the module by ignoring failures to
1377          * create the bonding_masters sysfs file.  Bonding devices
1378          * created by second or subsequent loads of the module will
1379          * not be listed in, or controllable by, bonding_masters, but
1380          * will have the usual "bonding" sysfs directory.
1381          *
1382          * This is done to preserve backwards compatibility for
1383          * initscripts/sysconfig, which load bonding multiple times to
1384          * configure multiple bonding devices.
1385          */
1386         if (ret == -EEXIST) {
1387                 netdev_class = NULL;
1388                 return 0;
1389         }
1390
1391         return ret;
1392
1393 }
1394
1395 /*
1396  * Remove /sys/class/net/bonding_masters.
1397  */
1398 void bond_destroy_sysfs(void)
1399 {
1400         if (netdev_class)
1401                 class_remove_file(netdev_class, &class_attr_bonding_masters);
1402 }
1403
1404 /*
1405  * Initialize sysfs for each bond.  This sets up and registers
1406  * the 'bondctl' directory for each individual bond under /sys/class/net.
1407  */
1408 int bond_create_sysfs_entry(struct bonding *bond)
1409 {
1410         struct net_device *dev = bond->dev;
1411         int err;
1412
1413         err = sysfs_create_group(&(dev->class_dev.kobj), &bonding_group);
1414         if (err) {
1415                 printk(KERN_EMERG "eek! didn't create group!\n");
1416         }
1417
1418         if (expected_refcount < 1)
1419                 expected_refcount = atomic_read(&bond->dev->class_dev.kobj.kref.refcount);
1420
1421         return err;
1422 }
1423 /*
1424  * Remove sysfs entries for each bond.
1425  */
1426 void bond_destroy_sysfs_entry(struct bonding *bond)
1427 {
1428         struct net_device *dev = bond->dev;
1429
1430         sysfs_remove_group(&(dev->class_dev.kobj), &bonding_group);
1431 }
1432