drivers: replace NIPQUAD()
[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 extern struct bond_parm_tbl fail_over_mac_tbl[];
54
55 static int expected_refcount = -1;
56 /*--------------------------- Data Structures -----------------------------*/
57
58 /* Bonding sysfs lock.  Why can't we just use the subsystem lock?
59  * Because kobject_register tries to acquire the subsystem lock.  If
60  * we already hold the lock (which we would if the user was creating
61  * a new bond through the sysfs interface), we deadlock.
62  * This lock is only needed when deleting a bond - we need to make sure
63  * that we don't collide with an ongoing ioctl.
64  */
65
66 struct rw_semaphore bonding_rwsem;
67
68
69
70
71 /*------------------------------ Functions --------------------------------*/
72
73 /*
74  * "show" function for the bond_masters attribute.
75  * The class parameter is ignored.
76  */
77 static ssize_t bonding_show_bonds(struct class *cls, char *buf)
78 {
79         int res = 0;
80         struct bonding *bond;
81
82         down_read(&(bonding_rwsem));
83
84         list_for_each_entry(bond, &bond_dev_list, bond_list) {
85                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
86                         /* not enough space for another interface name */
87                         if ((PAGE_SIZE - res) > 10)
88                                 res = PAGE_SIZE - 10;
89                         res += sprintf(buf + res, "++more++ ");
90                         break;
91                 }
92                 res += sprintf(buf + res, "%s ", bond->dev->name);
93         }
94         if (res)
95                 buf[res-1] = '\n'; /* eat the leftover space */
96         up_read(&(bonding_rwsem));
97         return res;
98 }
99
100 /*
101  * "store" function for the bond_masters attribute.  This is what
102  * creates and deletes entire bonds.
103  *
104  * The class parameter is ignored.
105  *
106  */
107
108 static ssize_t bonding_store_bonds(struct class *cls, const char *buffer, size_t count)
109 {
110         char command[IFNAMSIZ + 1] = {0, };
111         char *ifname;
112         int rv, res = count;
113         struct bonding *bond;
114
115         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
116         ifname = command + 1;
117         if ((strlen(command) <= 1) ||
118             !dev_valid_name(ifname))
119                 goto err_no_cmd;
120
121         if (command[0] == '+') {
122                 printk(KERN_INFO DRV_NAME
123                         ": %s is being created...\n", ifname);
124                 rv = bond_create(ifname, &bonding_defaults);
125                 if (rv) {
126                         printk(KERN_INFO DRV_NAME ": Bond creation failed.\n");
127                         res = rv;
128                 }
129                 goto out;
130         }
131
132         if (command[0] == '-') {
133                 rtnl_lock();
134                 down_write(&bonding_rwsem);
135
136                 list_for_each_entry(bond, &bond_dev_list, bond_list)
137                         if (strnicmp(bond->dev->name, ifname, IFNAMSIZ) == 0) {
138                                 /* check the ref count on the bond's kobject.
139                                  * If it's > expected, then there's a file open,
140                                  * and we have to fail.
141                                  */
142                                 if (atomic_read(&bond->dev->dev.kobj.kref.refcount)
143                                                         > expected_refcount){
144                                         printk(KERN_INFO DRV_NAME
145                                                 ": Unable remove bond %s due to open references.\n",
146                                                 ifname);
147                                         res = -EPERM;
148                                         goto out_unlock;
149                                 }
150                                 printk(KERN_INFO DRV_NAME
151                                         ": %s is being deleted...\n",
152                                         bond->dev->name);
153                                 bond_destroy(bond);
154                                 goto out_unlock;
155                         }
156
157                 printk(KERN_ERR DRV_NAME
158                         ": unable to delete non-existent bond %s\n", ifname);
159                 res = -ENODEV;
160                 goto out_unlock;
161         }
162
163 err_no_cmd:
164         printk(KERN_ERR DRV_NAME
165                 ": no command found in bonding_masters. Use +ifname or -ifname.\n");
166         return -EPERM;
167
168 out_unlock:
169         up_write(&bonding_rwsem);
170         rtnl_unlock();
171
172         /* Always return either count or an error.  If you return 0, you'll
173          * get called forever, which is bad.
174          */
175 out:
176         return res;
177 }
178 /* class attribute for bond_masters file.  This ends up in /sys/class/net */
179 static CLASS_ATTR(bonding_masters,  S_IWUSR | S_IRUGO,
180                   bonding_show_bonds, bonding_store_bonds);
181
182 int bond_create_slave_symlinks(struct net_device *master, struct net_device *slave)
183 {
184         char linkname[IFNAMSIZ+7];
185         int ret = 0;
186
187         /* first, create a link from the slave back to the master */
188         ret = sysfs_create_link(&(slave->dev.kobj), &(master->dev.kobj),
189                                 "master");
190         if (ret)
191                 return ret;
192         /* next, create a link from the master to the slave */
193         sprintf(linkname,"slave_%s",slave->name);
194         ret = sysfs_create_link(&(master->dev.kobj), &(slave->dev.kobj),
195                                 linkname);
196         return ret;
197
198 }
199
200 void bond_destroy_slave_symlinks(struct net_device *master, struct net_device *slave)
201 {
202         char linkname[IFNAMSIZ+7];
203
204         sysfs_remove_link(&(slave->dev.kobj), "master");
205         sprintf(linkname,"slave_%s",slave->name);
206         sysfs_remove_link(&(master->dev.kobj), linkname);
207 }
208
209
210 /*
211  * Show the slaves in the current bond.
212  */
213 static ssize_t bonding_show_slaves(struct device *d,
214                                    struct device_attribute *attr, char *buf)
215 {
216         struct slave *slave;
217         int i, res = 0;
218         struct bonding *bond = to_bond(d);
219
220         read_lock(&bond->lock);
221         bond_for_each_slave(bond, slave, i) {
222                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
223                         /* not enough space for another interface name */
224                         if ((PAGE_SIZE - res) > 10)
225                                 res = PAGE_SIZE - 10;
226                         res += sprintf(buf + res, "++more++ ");
227                         break;
228                 }
229                 res += sprintf(buf + res, "%s ", slave->dev->name);
230         }
231         read_unlock(&bond->lock);
232         if (res)
233                 buf[res-1] = '\n'; /* eat the leftover space */
234         return res;
235 }
236
237 /*
238  * Set the slaves in the current bond.  The bond interface must be
239  * up for this to succeed.
240  * This function is largely the same flow as bonding_update_bonds().
241  */
242 static ssize_t bonding_store_slaves(struct device *d,
243                                     struct device_attribute *attr,
244                                     const char *buffer, size_t count)
245 {
246         char command[IFNAMSIZ + 1] = { 0, };
247         char *ifname;
248         int i, res, found, ret = count;
249         u32 original_mtu;
250         struct slave *slave;
251         struct net_device *dev = NULL;
252         struct bonding *bond = to_bond(d);
253
254         /* Quick sanity check -- is the bond interface up? */
255         if (!(bond->dev->flags & IFF_UP)) {
256                 printk(KERN_WARNING DRV_NAME
257                        ": %s: doing slave updates when interface is down.\n",
258                        bond->dev->name);
259         }
260
261         /* Note:  We can't hold bond->lock here, as bond_create grabs it. */
262
263         rtnl_lock();
264         down_write(&(bonding_rwsem));
265
266         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
267         ifname = command + 1;
268         if ((strlen(command) <= 1) ||
269             !dev_valid_name(ifname))
270                 goto err_no_cmd;
271
272         if (command[0] == '+') {
273
274                 /* Got a slave name in ifname.  Is it already in the list? */
275                 found = 0;
276                 read_lock(&bond->lock);
277                 bond_for_each_slave(bond, slave, i)
278                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
279                                 printk(KERN_ERR DRV_NAME
280                                        ": %s: Interface %s is already enslaved!\n",
281                                        bond->dev->name, ifname);
282                                 ret = -EPERM;
283                                 read_unlock(&bond->lock);
284                                 goto out;
285                         }
286
287                 read_unlock(&bond->lock);
288                 printk(KERN_INFO DRV_NAME ": %s: Adding slave %s.\n",
289                        bond->dev->name, ifname);
290                 dev = dev_get_by_name(&init_net, ifname);
291                 if (!dev) {
292                         printk(KERN_INFO DRV_NAME
293                                ": %s: Interface %s does not exist!\n",
294                                bond->dev->name, ifname);
295                         ret = -EPERM;
296                         goto out;
297                 }
298                 else
299                         dev_put(dev);
300
301                 if (dev->flags & IFF_UP) {
302                         printk(KERN_ERR DRV_NAME
303                                ": %s: Error: Unable to enslave %s "
304                                "because it is already up.\n",
305                                bond->dev->name, dev->name);
306                         ret = -EPERM;
307                         goto out;
308                 }
309                 /* If this is the first slave, then we need to set
310                    the master's hardware address to be the same as the
311                    slave's. */
312                 if (!(*((u32 *) & (bond->dev->dev_addr[0])))) {
313                         memcpy(bond->dev->dev_addr, dev->dev_addr,
314                                dev->addr_len);
315                 }
316
317                 /* Set the slave's MTU to match the bond */
318                 original_mtu = dev->mtu;
319                 if (dev->mtu != bond->dev->mtu) {
320                         if (dev->change_mtu) {
321                                 res = dev->change_mtu(dev,
322                                                       bond->dev->mtu);
323                                 if (res) {
324                                         ret = res;
325                                         goto out;
326                                 }
327                         } else {
328                                 dev->mtu = bond->dev->mtu;
329                         }
330                 }
331                 res = bond_enslave(bond->dev, dev);
332                 bond_for_each_slave(bond, slave, i)
333                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0)
334                                 slave->original_mtu = original_mtu;
335                 if (res) {
336                         ret = res;
337                 }
338                 goto out;
339         }
340
341         if (command[0] == '-') {
342                 dev = NULL;
343                 original_mtu = 0;
344                 bond_for_each_slave(bond, slave, i)
345                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
346                                 dev = slave->dev;
347                                 original_mtu = slave->original_mtu;
348                                 break;
349                         }
350                 if (dev) {
351                         printk(KERN_INFO DRV_NAME ": %s: Removing slave %s\n",
352                                 bond->dev->name, dev->name);
353                                 res = bond_release(bond->dev, dev);
354                         if (res) {
355                                 ret = res;
356                                 goto out;
357                         }
358                         /* set the slave MTU to the default */
359                         if (dev->change_mtu) {
360                                 dev->change_mtu(dev, original_mtu);
361                         } else {
362                                 dev->mtu = original_mtu;
363                         }
364                 }
365                 else {
366                         printk(KERN_ERR DRV_NAME ": unable to remove non-existent slave %s for bond %s.\n",
367                                 ifname, bond->dev->name);
368                         ret = -ENODEV;
369                 }
370                 goto out;
371         }
372
373 err_no_cmd:
374         printk(KERN_ERR DRV_NAME ": no command found in slaves file for bond %s. Use +ifname or -ifname.\n", bond->dev->name);
375         ret = -EPERM;
376
377 out:
378         up_write(&(bonding_rwsem));
379         rtnl_unlock();
380         return ret;
381 }
382
383 static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves, bonding_store_slaves);
384
385 /*
386  * Show and set the bonding mode.  The bond interface must be down to
387  * change the mode.
388  */
389 static ssize_t bonding_show_mode(struct device *d,
390                                  struct device_attribute *attr, char *buf)
391 {
392         struct bonding *bond = to_bond(d);
393
394         return sprintf(buf, "%s %d\n",
395                         bond_mode_tbl[bond->params.mode].modename,
396                         bond->params.mode);
397 }
398
399 static ssize_t bonding_store_mode(struct device *d,
400                                   struct device_attribute *attr,
401                                   const char *buf, size_t count)
402 {
403         int new_value, ret = count;
404         struct bonding *bond = to_bond(d);
405
406         if (bond->dev->flags & IFF_UP) {
407                 printk(KERN_ERR DRV_NAME
408                        ": unable to update mode of %s because interface is up.\n",
409                        bond->dev->name);
410                 ret = -EPERM;
411                 goto out;
412         }
413
414         new_value = bond_parse_parm(buf, bond_mode_tbl);
415         if (new_value < 0)  {
416                 printk(KERN_ERR DRV_NAME
417                        ": %s: Ignoring invalid mode value %.*s.\n",
418                        bond->dev->name,
419                        (int)strlen(buf) - 1, buf);
420                 ret = -EINVAL;
421                 goto out;
422         } else {
423                 if (bond->params.mode == BOND_MODE_8023AD)
424                         bond_unset_master_3ad_flags(bond);
425
426                 if (bond->params.mode == BOND_MODE_ALB)
427                         bond_unset_master_alb_flags(bond);
428
429                 bond->params.mode = new_value;
430                 bond_set_mode_ops(bond, bond->params.mode);
431                 printk(KERN_INFO DRV_NAME ": %s: setting mode to %s (%d).\n",
432                         bond->dev->name, bond_mode_tbl[new_value].modename, new_value);
433         }
434 out:
435         return ret;
436 }
437 static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR, bonding_show_mode, bonding_store_mode);
438
439 /*
440  * Show and set the bonding transmit hash method.  The bond interface must be down to
441  * change the xmit hash policy.
442  */
443 static ssize_t bonding_show_xmit_hash(struct device *d,
444                                       struct device_attribute *attr,
445                                       char *buf)
446 {
447         struct bonding *bond = to_bond(d);
448
449         return sprintf(buf, "%s %d\n",
450                        xmit_hashtype_tbl[bond->params.xmit_policy].modename,
451                        bond->params.xmit_policy);
452 }
453
454 static ssize_t bonding_store_xmit_hash(struct device *d,
455                                        struct device_attribute *attr,
456                                        const char *buf, size_t count)
457 {
458         int new_value, ret = count;
459         struct bonding *bond = to_bond(d);
460
461         if (bond->dev->flags & IFF_UP) {
462                 printk(KERN_ERR DRV_NAME
463                        "%s: Interface is up. Unable to update xmit policy.\n",
464                        bond->dev->name);
465                 ret = -EPERM;
466                 goto out;
467         }
468
469         new_value = bond_parse_parm(buf, xmit_hashtype_tbl);
470         if (new_value < 0)  {
471                 printk(KERN_ERR DRV_NAME
472                        ": %s: Ignoring invalid xmit hash policy value %.*s.\n",
473                        bond->dev->name,
474                        (int)strlen(buf) - 1, buf);
475                 ret = -EINVAL;
476                 goto out;
477         } else {
478                 bond->params.xmit_policy = new_value;
479                 bond_set_mode_ops(bond, bond->params.mode);
480                 printk(KERN_INFO DRV_NAME ": %s: setting xmit hash policy to %s (%d).\n",
481                         bond->dev->name, xmit_hashtype_tbl[new_value].modename, new_value);
482         }
483 out:
484         return ret;
485 }
486 static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR, bonding_show_xmit_hash, bonding_store_xmit_hash);
487
488 /*
489  * Show and set arp_validate.
490  */
491 static ssize_t bonding_show_arp_validate(struct device *d,
492                                          struct device_attribute *attr,
493                                          char *buf)
494 {
495         struct bonding *bond = to_bond(d);
496
497         return sprintf(buf, "%s %d\n",
498                        arp_validate_tbl[bond->params.arp_validate].modename,
499                        bond->params.arp_validate);
500 }
501
502 static ssize_t bonding_store_arp_validate(struct device *d,
503                                           struct device_attribute *attr,
504                                           const char *buf, size_t count)
505 {
506         int new_value;
507         struct bonding *bond = to_bond(d);
508
509         new_value = bond_parse_parm(buf, arp_validate_tbl);
510         if (new_value < 0) {
511                 printk(KERN_ERR DRV_NAME
512                        ": %s: Ignoring invalid arp_validate value %s\n",
513                        bond->dev->name, buf);
514                 return -EINVAL;
515         }
516         if (new_value && (bond->params.mode != BOND_MODE_ACTIVEBACKUP)) {
517                 printk(KERN_ERR DRV_NAME
518                        ": %s: arp_validate only supported in active-backup mode.\n",
519                        bond->dev->name);
520                 return -EINVAL;
521         }
522         printk(KERN_INFO DRV_NAME ": %s: setting arp_validate to %s (%d).\n",
523                bond->dev->name, arp_validate_tbl[new_value].modename,
524                new_value);
525
526         if (!bond->params.arp_validate && new_value) {
527                 bond_register_arp(bond);
528         } else if (bond->params.arp_validate && !new_value) {
529                 bond_unregister_arp(bond);
530         }
531
532         bond->params.arp_validate = new_value;
533
534         return count;
535 }
536
537 static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate, bonding_store_arp_validate);
538
539 /*
540  * Show and store fail_over_mac.  User only allowed to change the
541  * value when there are no slaves.
542  */
543 static ssize_t bonding_show_fail_over_mac(struct device *d, struct device_attribute *attr, char *buf)
544 {
545         struct bonding *bond = to_bond(d);
546
547         return sprintf(buf, "%s %d\n",
548                        fail_over_mac_tbl[bond->params.fail_over_mac].modename,
549                        bond->params.fail_over_mac);
550 }
551
552 static ssize_t bonding_store_fail_over_mac(struct device *d, struct device_attribute *attr, const char *buf, size_t count)
553 {
554         int new_value;
555         struct bonding *bond = to_bond(d);
556
557         if (bond->slave_cnt != 0) {
558                 printk(KERN_ERR DRV_NAME
559                        ": %s: Can't alter fail_over_mac with slaves in bond.\n",
560                        bond->dev->name);
561                 return -EPERM;
562         }
563
564         new_value = bond_parse_parm(buf, fail_over_mac_tbl);
565         if (new_value < 0) {
566                 printk(KERN_ERR DRV_NAME
567                        ": %s: Ignoring invalid fail_over_mac value %s.\n",
568                        bond->dev->name, buf);
569                 return -EINVAL;
570         }
571
572         bond->params.fail_over_mac = new_value;
573         printk(KERN_INFO DRV_NAME ": %s: Setting fail_over_mac to %s (%d).\n",
574                bond->dev->name, fail_over_mac_tbl[new_value].modename,
575                new_value);
576
577         return count;
578 }
579
580 static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR, bonding_show_fail_over_mac, bonding_store_fail_over_mac);
581
582 /*
583  * Show and set the arp timer interval.  There are two tricky bits
584  * here.  First, if ARP monitoring is activated, then we must disable
585  * MII monitoring.  Second, if the ARP timer isn't running, we must
586  * start it.
587  */
588 static ssize_t bonding_show_arp_interval(struct device *d,
589                                          struct device_attribute *attr,
590                                          char *buf)
591 {
592         struct bonding *bond = to_bond(d);
593
594         return sprintf(buf, "%d\n", bond->params.arp_interval);
595 }
596
597 static ssize_t bonding_store_arp_interval(struct device *d,
598                                           struct device_attribute *attr,
599                                           const char *buf, size_t count)
600 {
601         int new_value, ret = count;
602         struct bonding *bond = to_bond(d);
603
604         if (sscanf(buf, "%d", &new_value) != 1) {
605                 printk(KERN_ERR DRV_NAME
606                        ": %s: no arp_interval value specified.\n",
607                        bond->dev->name);
608                 ret = -EINVAL;
609                 goto out;
610         }
611         if (new_value < 0) {
612                 printk(KERN_ERR DRV_NAME
613                        ": %s: Invalid arp_interval value %d not in range 1-%d; rejected.\n",
614                        bond->dev->name, new_value, INT_MAX);
615                 ret = -EINVAL;
616                 goto out;
617         }
618
619         printk(KERN_INFO DRV_NAME
620                ": %s: Setting ARP monitoring interval to %d.\n",
621                bond->dev->name, new_value);
622         bond->params.arp_interval = new_value;
623         if (bond->params.miimon) {
624                 printk(KERN_INFO DRV_NAME
625                        ": %s: ARP monitoring cannot be used with MII monitoring. "
626                        "%s Disabling MII monitoring.\n",
627                        bond->dev->name, bond->dev->name);
628                 bond->params.miimon = 0;
629                 if (delayed_work_pending(&bond->mii_work)) {
630                         cancel_delayed_work(&bond->mii_work);
631                         flush_workqueue(bond->wq);
632                 }
633         }
634         if (!bond->params.arp_targets[0]) {
635                 printk(KERN_INFO DRV_NAME
636                        ": %s: ARP monitoring has been set up, "
637                        "but no ARP targets have been specified.\n",
638                        bond->dev->name);
639         }
640         if (bond->dev->flags & IFF_UP) {
641                 /* If the interface is up, we may need to fire off
642                  * the ARP timer.  If the interface is down, the
643                  * timer will get fired off when the open function
644                  * is called.
645                  */
646                 if (!delayed_work_pending(&bond->arp_work)) {
647                         if (bond->params.mode == BOND_MODE_ACTIVEBACKUP)
648                                 INIT_DELAYED_WORK(&bond->arp_work,
649                                                   bond_activebackup_arp_mon);
650                         else
651                                 INIT_DELAYED_WORK(&bond->arp_work,
652                                                   bond_loadbalance_arp_mon);
653
654                         queue_delayed_work(bond->wq, &bond->arp_work, 0);
655                 }
656         }
657
658 out:
659         return ret;
660 }
661 static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR , bonding_show_arp_interval, bonding_store_arp_interval);
662
663 /*
664  * Show and set the arp targets.
665  */
666 static ssize_t bonding_show_arp_targets(struct device *d,
667                                         struct device_attribute *attr,
668                                         char *buf)
669 {
670         int i, res = 0;
671         struct bonding *bond = to_bond(d);
672
673         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
674                 if (bond->params.arp_targets[i])
675                         res += sprintf(buf + res, "%pI4 ",
676                                        &bond->params.arp_targets[i]);
677         }
678         if (res)
679                 buf[res-1] = '\n'; /* eat the leftover space */
680         return res;
681 }
682
683 static ssize_t bonding_store_arp_targets(struct device *d,
684                                          struct device_attribute *attr,
685                                          const char *buf, size_t count)
686 {
687         __be32 newtarget;
688         int i = 0, done = 0, ret = count;
689         struct bonding *bond = to_bond(d);
690         __be32 *targets;
691
692         targets = bond->params.arp_targets;
693         newtarget = in_aton(buf + 1);
694         /* look for adds */
695         if (buf[0] == '+') {
696                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
697                         printk(KERN_ERR DRV_NAME
698                                ": %s: invalid ARP target %pI4 specified for addition\n",
699                                bond->dev->name, &newtarget);
700                         ret = -EINVAL;
701                         goto out;
702                 }
703                 /* look for an empty slot to put the target in, and check for dupes */
704                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
705                         if (targets[i] == newtarget) { /* duplicate */
706                                 printk(KERN_ERR DRV_NAME
707                                        ": %s: ARP target %pI4 is already present\n",
708                                        bond->dev->name, &newtarget);
709                                 if (done)
710                                         targets[i] = 0;
711                                 ret = -EINVAL;
712                                 goto out;
713                         }
714                         if (targets[i] == 0 && !done) {
715                                 printk(KERN_INFO DRV_NAME
716                                        ": %s: adding ARP target %pI4.\n",
717                                        bond->dev->name, &newtarget);
718                                 done = 1;
719                                 targets[i] = newtarget;
720                         }
721                 }
722                 if (!done) {
723                         printk(KERN_ERR DRV_NAME
724                                ": %s: ARP target table is full!\n",
725                                bond->dev->name);
726                         ret = -EINVAL;
727                         goto out;
728                 }
729
730         }
731         else if (buf[0] == '-') {
732                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
733                         printk(KERN_ERR DRV_NAME
734                                ": %s: invalid ARP target %pI4 specified for removal\n",
735                                bond->dev->name, &newtarget);
736                         ret = -EINVAL;
737                         goto out;
738                 }
739
740                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
741                         if (targets[i] == newtarget) {
742                                 printk(KERN_INFO DRV_NAME
743                                        ": %s: removing ARP target %pI4.\n",
744                                        bond->dev->name, &newtarget);
745                                 targets[i] = 0;
746                                 done = 1;
747                         }
748                 }
749                 if (!done) {
750                         printk(KERN_INFO DRV_NAME
751                                ": %s: unable to remove nonexistent ARP target %pI4.\n",
752                                bond->dev->name, &newtarget);
753                         ret = -EINVAL;
754                         goto out;
755                 }
756         }
757         else {
758                 printk(KERN_ERR DRV_NAME ": no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
759                         bond->dev->name);
760                 ret = -EPERM;
761                 goto out;
762         }
763
764 out:
765         return ret;
766 }
767 static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
768
769 /*
770  * Show and set the up and down delays.  These must be multiples of the
771  * MII monitoring value, and are stored internally as the multiplier.
772  * Thus, we must translate to MS for the real world.
773  */
774 static ssize_t bonding_show_downdelay(struct device *d,
775                                       struct device_attribute *attr,
776                                       char *buf)
777 {
778         struct bonding *bond = to_bond(d);
779
780         return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
781 }
782
783 static ssize_t bonding_store_downdelay(struct device *d,
784                                        struct device_attribute *attr,
785                                        const char *buf, size_t count)
786 {
787         int new_value, ret = count;
788         struct bonding *bond = to_bond(d);
789
790         if (!(bond->params.miimon)) {
791                 printk(KERN_ERR DRV_NAME
792                        ": %s: Unable to set down delay as MII monitoring is disabled\n",
793                        bond->dev->name);
794                 ret = -EPERM;
795                 goto out;
796         }
797
798         if (sscanf(buf, "%d", &new_value) != 1) {
799                 printk(KERN_ERR DRV_NAME
800                        ": %s: no down delay value specified.\n",
801                        bond->dev->name);
802                 ret = -EINVAL;
803                 goto out;
804         }
805         if (new_value < 0) {
806                 printk(KERN_ERR DRV_NAME
807                        ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
808                        bond->dev->name, new_value, 1, INT_MAX);
809                 ret = -EINVAL;
810                 goto out;
811         } else {
812                 if ((new_value % bond->params.miimon) != 0) {
813                         printk(KERN_WARNING DRV_NAME
814                                ": %s: Warning: down delay (%d) is not a multiple "
815                                "of miimon (%d), delay rounded to %d ms\n",
816                                bond->dev->name, new_value, bond->params.miimon,
817                                (new_value / bond->params.miimon) *
818                                bond->params.miimon);
819                 }
820                 bond->params.downdelay = new_value / bond->params.miimon;
821                 printk(KERN_INFO DRV_NAME ": %s: Setting down delay to %d.\n",
822                        bond->dev->name, bond->params.downdelay * bond->params.miimon);
823
824         }
825
826 out:
827         return ret;
828 }
829 static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR , bonding_show_downdelay, bonding_store_downdelay);
830
831 static ssize_t bonding_show_updelay(struct device *d,
832                                     struct device_attribute *attr,
833                                     char *buf)
834 {
835         struct bonding *bond = to_bond(d);
836
837         return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
838
839 }
840
841 static ssize_t bonding_store_updelay(struct device *d,
842                                      struct device_attribute *attr,
843                                      const char *buf, size_t count)
844 {
845         int new_value, ret = count;
846         struct bonding *bond = to_bond(d);
847
848         if (!(bond->params.miimon)) {
849                 printk(KERN_ERR DRV_NAME
850                        ": %s: Unable to set up delay as MII monitoring is disabled\n",
851                        bond->dev->name);
852                 ret = -EPERM;
853                 goto out;
854         }
855
856         if (sscanf(buf, "%d", &new_value) != 1) {
857                 printk(KERN_ERR DRV_NAME
858                        ": %s: no up delay value specified.\n",
859                        bond->dev->name);
860                 ret = -EINVAL;
861                 goto out;
862         }
863         if (new_value < 0) {
864                 printk(KERN_ERR DRV_NAME
865                        ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
866                        bond->dev->name, new_value, 1, INT_MAX);
867                 ret = -EINVAL;
868                 goto out;
869         } else {
870                 if ((new_value % bond->params.miimon) != 0) {
871                         printk(KERN_WARNING DRV_NAME
872                                ": %s: Warning: up delay (%d) is not a multiple "
873                                "of miimon (%d), updelay rounded to %d ms\n",
874                                bond->dev->name, new_value, bond->params.miimon,
875                                (new_value / bond->params.miimon) *
876                                bond->params.miimon);
877                 }
878                 bond->params.updelay = new_value / bond->params.miimon;
879                 printk(KERN_INFO DRV_NAME ": %s: Setting up delay to %d.\n",
880                        bond->dev->name, bond->params.updelay * bond->params.miimon);
881
882         }
883
884 out:
885         return ret;
886 }
887 static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR , bonding_show_updelay, bonding_store_updelay);
888
889 /*
890  * Show and set the LACP interval.  Interface must be down, and the mode
891  * must be set to 802.3ad mode.
892  */
893 static ssize_t bonding_show_lacp(struct device *d,
894                                  struct device_attribute *attr,
895                                  char *buf)
896 {
897         struct bonding *bond = to_bond(d);
898
899         return sprintf(buf, "%s %d\n",
900                 bond_lacp_tbl[bond->params.lacp_fast].modename,
901                 bond->params.lacp_fast);
902 }
903
904 static ssize_t bonding_store_lacp(struct device *d,
905                                   struct device_attribute *attr,
906                                   const char *buf, size_t count)
907 {
908         int new_value, ret = count;
909         struct bonding *bond = to_bond(d);
910
911         if (bond->dev->flags & IFF_UP) {
912                 printk(KERN_ERR DRV_NAME
913                        ": %s: Unable to update LACP rate because interface is up.\n",
914                        bond->dev->name);
915                 ret = -EPERM;
916                 goto out;
917         }
918
919         if (bond->params.mode != BOND_MODE_8023AD) {
920                 printk(KERN_ERR DRV_NAME
921                        ": %s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
922                        bond->dev->name);
923                 ret = -EPERM;
924                 goto out;
925         }
926
927         new_value = bond_parse_parm(buf, bond_lacp_tbl);
928
929         if ((new_value == 1) || (new_value == 0)) {
930                 bond->params.lacp_fast = new_value;
931                 printk(KERN_INFO DRV_NAME
932                        ": %s: Setting LACP rate to %s (%d).\n",
933                        bond->dev->name, bond_lacp_tbl[new_value].modename, new_value);
934         } else {
935                 printk(KERN_ERR DRV_NAME
936                        ": %s: Ignoring invalid LACP rate value %.*s.\n",
937                         bond->dev->name, (int)strlen(buf) - 1, buf);
938                 ret = -EINVAL;
939         }
940 out:
941         return ret;
942 }
943 static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR, bonding_show_lacp, bonding_store_lacp);
944
945 /*
946  * Show and set the number of grat ARP to send after a failover event.
947  */
948 static ssize_t bonding_show_n_grat_arp(struct device *d,
949                                    struct device_attribute *attr,
950                                    char *buf)
951 {
952         struct bonding *bond = to_bond(d);
953
954         return sprintf(buf, "%d\n", bond->params.num_grat_arp);
955 }
956
957 static ssize_t bonding_store_n_grat_arp(struct device *d,
958                                     struct device_attribute *attr,
959                                     const char *buf, size_t count)
960 {
961         int new_value, ret = count;
962         struct bonding *bond = to_bond(d);
963
964         if (sscanf(buf, "%d", &new_value) != 1) {
965                 printk(KERN_ERR DRV_NAME
966                        ": %s: no num_grat_arp value specified.\n",
967                        bond->dev->name);
968                 ret = -EINVAL;
969                 goto out;
970         }
971         if (new_value < 0 || new_value > 255) {
972                 printk(KERN_ERR DRV_NAME
973                        ": %s: Invalid num_grat_arp value %d not in range 0-255; rejected.\n",
974                        bond->dev->name, new_value);
975                 ret = -EINVAL;
976                 goto out;
977         } else {
978                 bond->params.num_grat_arp = new_value;
979         }
980 out:
981         return ret;
982 }
983 static DEVICE_ATTR(num_grat_arp, S_IRUGO | S_IWUSR, bonding_show_n_grat_arp, bonding_store_n_grat_arp);
984 /*
985  * Show and set the MII monitor interval.  There are two tricky bits
986  * here.  First, if MII monitoring is activated, then we must disable
987  * ARP monitoring.  Second, if the timer isn't running, we must
988  * start it.
989  */
990 static ssize_t bonding_show_miimon(struct device *d,
991                                    struct device_attribute *attr,
992                                    char *buf)
993 {
994         struct bonding *bond = to_bond(d);
995
996         return sprintf(buf, "%d\n", bond->params.miimon);
997 }
998
999 static ssize_t bonding_store_miimon(struct device *d,
1000                                     struct device_attribute *attr,
1001                                     const char *buf, size_t count)
1002 {
1003         int new_value, ret = count;
1004         struct bonding *bond = to_bond(d);
1005
1006         if (sscanf(buf, "%d", &new_value) != 1) {
1007                 printk(KERN_ERR DRV_NAME
1008                        ": %s: no miimon value specified.\n",
1009                        bond->dev->name);
1010                 ret = -EINVAL;
1011                 goto out;
1012         }
1013         if (new_value < 0) {
1014                 printk(KERN_ERR DRV_NAME
1015                        ": %s: Invalid miimon value %d not in range %d-%d; rejected.\n",
1016                        bond->dev->name, new_value, 1, INT_MAX);
1017                 ret = -EINVAL;
1018                 goto out;
1019         } else {
1020                 printk(KERN_INFO DRV_NAME
1021                        ": %s: Setting MII monitoring interval to %d.\n",
1022                        bond->dev->name, new_value);
1023                 bond->params.miimon = new_value;
1024                 if(bond->params.updelay)
1025                         printk(KERN_INFO DRV_NAME
1026                               ": %s: Note: Updating updelay (to %d) "
1027                               "since it is a multiple of the miimon value.\n",
1028                               bond->dev->name,
1029                               bond->params.updelay * bond->params.miimon);
1030                 if(bond->params.downdelay)
1031                         printk(KERN_INFO DRV_NAME
1032                               ": %s: Note: Updating downdelay (to %d) "
1033                               "since it is a multiple of the miimon value.\n",
1034                               bond->dev->name,
1035                               bond->params.downdelay * bond->params.miimon);
1036                 if (bond->params.arp_interval) {
1037                         printk(KERN_INFO DRV_NAME
1038                                ": %s: MII monitoring cannot be used with "
1039                                "ARP monitoring. Disabling ARP monitoring...\n",
1040                                bond->dev->name);
1041                         bond->params.arp_interval = 0;
1042                         if (bond->params.arp_validate) {
1043                                 bond_unregister_arp(bond);
1044                                 bond->params.arp_validate =
1045                                         BOND_ARP_VALIDATE_NONE;
1046                         }
1047                         if (delayed_work_pending(&bond->arp_work)) {
1048                                 cancel_delayed_work(&bond->arp_work);
1049                                 flush_workqueue(bond->wq);
1050                         }
1051                 }
1052
1053                 if (bond->dev->flags & IFF_UP) {
1054                         /* If the interface is up, we may need to fire off
1055                          * the MII timer. If the interface is down, the
1056                          * timer will get fired off when the open function
1057                          * is called.
1058                          */
1059                         if (!delayed_work_pending(&bond->mii_work)) {
1060                                 INIT_DELAYED_WORK(&bond->mii_work,
1061                                                   bond_mii_monitor);
1062                                 queue_delayed_work(bond->wq,
1063                                                    &bond->mii_work, 0);
1064                         }
1065                 }
1066         }
1067 out:
1068         return ret;
1069 }
1070 static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR, bonding_show_miimon, bonding_store_miimon);
1071
1072 /*
1073  * Show and set the primary slave.  The store function is much
1074  * simpler than bonding_store_slaves function because it only needs to
1075  * handle one interface name.
1076  * The bond must be a mode that supports a primary for this be
1077  * set.
1078  */
1079 static ssize_t bonding_show_primary(struct device *d,
1080                                     struct device_attribute *attr,
1081                                     char *buf)
1082 {
1083         int count = 0;
1084         struct bonding *bond = to_bond(d);
1085
1086         if (bond->primary_slave)
1087                 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);
1088
1089         return count;
1090 }
1091
1092 static ssize_t bonding_store_primary(struct device *d,
1093                                      struct device_attribute *attr,
1094                                      const char *buf, size_t count)
1095 {
1096         int i;
1097         struct slave *slave;
1098         struct bonding *bond = to_bond(d);
1099
1100         rtnl_lock();
1101         read_lock(&bond->lock);
1102         write_lock_bh(&bond->curr_slave_lock);
1103
1104         if (!USES_PRIMARY(bond->params.mode)) {
1105                 printk(KERN_INFO DRV_NAME
1106                        ": %s: Unable to set primary slave; %s is in mode %d\n",
1107                        bond->dev->name, bond->dev->name, bond->params.mode);
1108         } else {
1109                 bond_for_each_slave(bond, slave, i) {
1110                         if (strnicmp
1111                             (slave->dev->name, buf,
1112                              strlen(slave->dev->name)) == 0) {
1113                                 printk(KERN_INFO DRV_NAME
1114                                        ": %s: Setting %s as primary slave.\n",
1115                                        bond->dev->name, slave->dev->name);
1116                                 bond->primary_slave = slave;
1117                                 bond_select_active_slave(bond);
1118                                 goto out;
1119                         }
1120                 }
1121
1122                 /* if we got here, then we didn't match the name of any slave */
1123
1124                 if (strlen(buf) == 0 || buf[0] == '\n') {
1125                         printk(KERN_INFO DRV_NAME
1126                                ": %s: Setting primary slave to None.\n",
1127                                bond->dev->name);
1128                         bond->primary_slave = NULL;
1129                                 bond_select_active_slave(bond);
1130                 } else {
1131                         printk(KERN_INFO DRV_NAME
1132                                ": %s: Unable to set %.*s as primary slave as it is not a slave.\n",
1133                                bond->dev->name, (int)strlen(buf) - 1, buf);
1134                 }
1135         }
1136 out:
1137         write_unlock_bh(&bond->curr_slave_lock);
1138         read_unlock(&bond->lock);
1139         rtnl_unlock();
1140
1141         return count;
1142 }
1143 static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR, bonding_show_primary, bonding_store_primary);
1144
1145 /*
1146  * Show and set the use_carrier flag.
1147  */
1148 static ssize_t bonding_show_carrier(struct device *d,
1149                                     struct device_attribute *attr,
1150                                     char *buf)
1151 {
1152         struct bonding *bond = to_bond(d);
1153
1154         return sprintf(buf, "%d\n", bond->params.use_carrier);
1155 }
1156
1157 static ssize_t bonding_store_carrier(struct device *d,
1158                                      struct device_attribute *attr,
1159                                      const char *buf, size_t count)
1160 {
1161         int new_value, ret = count;
1162         struct bonding *bond = to_bond(d);
1163
1164
1165         if (sscanf(buf, "%d", &new_value) != 1) {
1166                 printk(KERN_ERR DRV_NAME
1167                        ": %s: no use_carrier value specified.\n",
1168                        bond->dev->name);
1169                 ret = -EINVAL;
1170                 goto out;
1171         }
1172         if ((new_value == 0) || (new_value == 1)) {
1173                 bond->params.use_carrier = new_value;
1174                 printk(KERN_INFO DRV_NAME ": %s: Setting use_carrier to %d.\n",
1175                        bond->dev->name, new_value);
1176         } else {
1177                 printk(KERN_INFO DRV_NAME
1178                        ": %s: Ignoring invalid use_carrier value %d.\n",
1179                        bond->dev->name, new_value);
1180         }
1181 out:
1182         return count;
1183 }
1184 static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR, bonding_show_carrier, bonding_store_carrier);
1185
1186
1187 /*
1188  * Show and set currently active_slave.
1189  */
1190 static ssize_t bonding_show_active_slave(struct device *d,
1191                                          struct device_attribute *attr,
1192                                          char *buf)
1193 {
1194         struct slave *curr;
1195         struct bonding *bond = to_bond(d);
1196         int count = 0;
1197
1198         read_lock(&bond->curr_slave_lock);
1199         curr = bond->curr_active_slave;
1200         read_unlock(&bond->curr_slave_lock);
1201
1202         if (USES_PRIMARY(bond->params.mode) && curr)
1203                 count = sprintf(buf, "%s\n", curr->dev->name);
1204         return count;
1205 }
1206
1207 static ssize_t bonding_store_active_slave(struct device *d,
1208                                           struct device_attribute *attr,
1209                                           const char *buf, size_t count)
1210 {
1211         int i;
1212         struct slave *slave;
1213         struct slave *old_active = NULL;
1214         struct slave *new_active = NULL;
1215         struct bonding *bond = to_bond(d);
1216
1217         rtnl_lock();
1218         read_lock(&bond->lock);
1219         write_lock_bh(&bond->curr_slave_lock);
1220
1221         if (!USES_PRIMARY(bond->params.mode)) {
1222                 printk(KERN_INFO DRV_NAME
1223                        ": %s: Unable to change active slave; %s is in mode %d\n",
1224                        bond->dev->name, bond->dev->name, bond->params.mode);
1225         } else {
1226                 bond_for_each_slave(bond, slave, i) {
1227                         if (strnicmp
1228                             (slave->dev->name, buf,
1229                              strlen(slave->dev->name)) == 0) {
1230                                 old_active = bond->curr_active_slave;
1231                                 new_active = slave;
1232                                 if (new_active == old_active) {
1233                                         /* do nothing */
1234                                         printk(KERN_INFO DRV_NAME
1235                                                ": %s: %s is already the current active slave.\n",
1236                                                bond->dev->name, slave->dev->name);
1237                                         goto out;
1238                                 }
1239                                 else {
1240                                         if ((new_active) &&
1241                                             (old_active) &&
1242                                             (new_active->link == BOND_LINK_UP) &&
1243                                             IS_UP(new_active->dev)) {
1244                                                 printk(KERN_INFO DRV_NAME
1245                                                       ": %s: Setting %s as active slave.\n",
1246                                                       bond->dev->name, slave->dev->name);
1247                                                 bond_change_active_slave(bond, new_active);
1248                                         }
1249                                         else {
1250                                                 printk(KERN_INFO DRV_NAME
1251                                                       ": %s: Could not set %s as active slave; "
1252                                                       "either %s is down or the link is down.\n",
1253                                                       bond->dev->name, slave->dev->name,
1254                                                       slave->dev->name);
1255                                         }
1256                                         goto out;
1257                                 }
1258                         }
1259                 }
1260
1261                 /* if we got here, then we didn't match the name of any slave */
1262
1263                 if (strlen(buf) == 0 || buf[0] == '\n') {
1264                         printk(KERN_INFO DRV_NAME
1265                                ": %s: Setting active slave to None.\n",
1266                                bond->dev->name);
1267                         bond->primary_slave = NULL;
1268                                 bond_select_active_slave(bond);
1269                 } else {
1270                         printk(KERN_INFO DRV_NAME
1271                                ": %s: Unable to set %.*s as active slave as it is not a slave.\n",
1272                                bond->dev->name, (int)strlen(buf) - 1, buf);
1273                 }
1274         }
1275 out:
1276         write_unlock_bh(&bond->curr_slave_lock);
1277         read_unlock(&bond->lock);
1278         rtnl_unlock();
1279
1280         return count;
1281
1282 }
1283 static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR, bonding_show_active_slave, bonding_store_active_slave);
1284
1285
1286 /*
1287  * Show link status of the bond interface.
1288  */
1289 static ssize_t bonding_show_mii_status(struct device *d,
1290                                        struct device_attribute *attr,
1291                                        char *buf)
1292 {
1293         struct slave *curr;
1294         struct bonding *bond = to_bond(d);
1295
1296         read_lock(&bond->curr_slave_lock);
1297         curr = bond->curr_active_slave;
1298         read_unlock(&bond->curr_slave_lock);
1299
1300         return sprintf(buf, "%s\n", (curr) ? "up" : "down");
1301 }
1302 static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1303
1304
1305 /*
1306  * Show current 802.3ad aggregator ID.
1307  */
1308 static ssize_t bonding_show_ad_aggregator(struct device *d,
1309                                           struct device_attribute *attr,
1310                                           char *buf)
1311 {
1312         int count = 0;
1313         struct bonding *bond = to_bond(d);
1314
1315         if (bond->params.mode == BOND_MODE_8023AD) {
1316                 struct ad_info ad_info;
1317                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.aggregator_id);
1318         }
1319
1320         return count;
1321 }
1322 static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1323
1324
1325 /*
1326  * Show number of active 802.3ad ports.
1327  */
1328 static ssize_t bonding_show_ad_num_ports(struct device *d,
1329                                          struct device_attribute *attr,
1330                                          char *buf)
1331 {
1332         int count = 0;
1333         struct bonding *bond = to_bond(d);
1334
1335         if (bond->params.mode == BOND_MODE_8023AD) {
1336                 struct ad_info ad_info;
1337                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0: ad_info.ports);
1338         }
1339
1340         return count;
1341 }
1342 static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1343
1344
1345 /*
1346  * Show current 802.3ad actor key.
1347  */
1348 static ssize_t bonding_show_ad_actor_key(struct device *d,
1349                                          struct device_attribute *attr,
1350                                          char *buf)
1351 {
1352         int count = 0;
1353         struct bonding *bond = to_bond(d);
1354
1355         if (bond->params.mode == BOND_MODE_8023AD) {
1356                 struct ad_info ad_info;
1357                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.actor_key);
1358         }
1359
1360         return count;
1361 }
1362 static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1363
1364
1365 /*
1366  * Show current 802.3ad partner key.
1367  */
1368 static ssize_t bonding_show_ad_partner_key(struct device *d,
1369                                            struct device_attribute *attr,
1370                                            char *buf)
1371 {
1372         int count = 0;
1373         struct bonding *bond = to_bond(d);
1374
1375         if (bond->params.mode == BOND_MODE_8023AD) {
1376                 struct ad_info ad_info;
1377                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.partner_key);
1378         }
1379
1380         return count;
1381 }
1382 static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1383
1384
1385 /*
1386  * Show current 802.3ad partner mac.
1387  */
1388 static ssize_t bonding_show_ad_partner_mac(struct device *d,
1389                                            struct device_attribute *attr,
1390                                            char *buf)
1391 {
1392         int count = 0;
1393         struct bonding *bond = to_bond(d);
1394
1395         if (bond->params.mode == BOND_MODE_8023AD) {
1396                 struct ad_info ad_info;
1397                 if (!bond_3ad_get_active_agg_info(bond, &ad_info)) {
1398                         count = sprintf(buf, "%pM\n", ad_info.partner_system);
1399                 }
1400         }
1401
1402         return count;
1403 }
1404 static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1405
1406
1407
1408 static struct attribute *per_bond_attrs[] = {
1409         &dev_attr_slaves.attr,
1410         &dev_attr_mode.attr,
1411         &dev_attr_fail_over_mac.attr,
1412         &dev_attr_arp_validate.attr,
1413         &dev_attr_arp_interval.attr,
1414         &dev_attr_arp_ip_target.attr,
1415         &dev_attr_downdelay.attr,
1416         &dev_attr_updelay.attr,
1417         &dev_attr_lacp_rate.attr,
1418         &dev_attr_xmit_hash_policy.attr,
1419         &dev_attr_num_grat_arp.attr,
1420         &dev_attr_miimon.attr,
1421         &dev_attr_primary.attr,
1422         &dev_attr_use_carrier.attr,
1423         &dev_attr_active_slave.attr,
1424         &dev_attr_mii_status.attr,
1425         &dev_attr_ad_aggregator.attr,
1426         &dev_attr_ad_num_ports.attr,
1427         &dev_attr_ad_actor_key.attr,
1428         &dev_attr_ad_partner_key.attr,
1429         &dev_attr_ad_partner_mac.attr,
1430         NULL,
1431 };
1432
1433 static struct attribute_group bonding_group = {
1434         .name = "bonding",
1435         .attrs = per_bond_attrs,
1436 };
1437
1438 /*
1439  * Initialize sysfs.  This sets up the bonding_masters file in
1440  * /sys/class/net.
1441  */
1442 int bond_create_sysfs(void)
1443 {
1444         int ret;
1445
1446         ret = netdev_class_create_file(&class_attr_bonding_masters);
1447         /*
1448          * Permit multiple loads of the module by ignoring failures to
1449          * create the bonding_masters sysfs file.  Bonding devices
1450          * created by second or subsequent loads of the module will
1451          * not be listed in, or controllable by, bonding_masters, but
1452          * will have the usual "bonding" sysfs directory.
1453          *
1454          * This is done to preserve backwards compatibility for
1455          * initscripts/sysconfig, which load bonding multiple times to
1456          * configure multiple bonding devices.
1457          */
1458         if (ret == -EEXIST) {
1459                 /* Is someone being kinky and naming a device bonding_master? */
1460                 if (__dev_get_by_name(&init_net,
1461                                       class_attr_bonding_masters.attr.name))
1462                         printk(KERN_ERR
1463                                "network device named %s already exists in sysfs",
1464                                class_attr_bonding_masters.attr.name);
1465         }
1466
1467         return ret;
1468
1469 }
1470
1471 /*
1472  * Remove /sys/class/net/bonding_masters.
1473  */
1474 void bond_destroy_sysfs(void)
1475 {
1476         netdev_class_remove_file(&class_attr_bonding_masters);
1477 }
1478
1479 /*
1480  * Initialize sysfs for each bond.  This sets up and registers
1481  * the 'bondctl' directory for each individual bond under /sys/class/net.
1482  */
1483 int bond_create_sysfs_entry(struct bonding *bond)
1484 {
1485         struct net_device *dev = bond->dev;
1486         int err;
1487
1488         err = sysfs_create_group(&(dev->dev.kobj), &bonding_group);
1489         if (err) {
1490                 printk(KERN_EMERG "eek! didn't create group!\n");
1491         }
1492
1493         if (expected_refcount < 1)
1494                 expected_refcount = atomic_read(&bond->dev->dev.kobj.kref.refcount);
1495
1496         return err;
1497 }
1498 /*
1499  * Remove sysfs entries for each bond.
1500  */
1501 void bond_destroy_sysfs_entry(struct bonding *bond)
1502 {
1503         struct net_device *dev = bond->dev;
1504
1505         sysfs_remove_group(&(dev->dev.kobj), &bonding_group);
1506 }
1507