Fix misspellings of "system", "controller", "interrupt" and "necessary".
[linux-2.6.git] / drivers / net / bonding / bond_sysfs.c
1
2 /*
3  * Copyright(c) 2004-2005 Intel Corporation. All rights reserved.
4  *
5  * This program is free software; you can redistribute it and/or modify it
6  * under the terms of the GNU General Public License as published by the
7  * Free Software Foundation; either version 2 of the License, or
8  * (at your option) any later version.
9  *
10  * This program is distributed in the hope that it will be useful, but
11  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
12  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
13  * for more details.
14  *
15  * You should have received a copy of the GNU General Public License along
16  * with this program; if not, write to the Free Software Foundation, Inc.,
17  * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
18  *
19  * The full GNU General Public License is included in this distribution in the
20  * file called LICENSE.
21  *
22  */
23 #include <linux/kernel.h>
24 #include <linux/module.h>
25 #include <linux/device.h>
26 #include <linux/sysdev.h>
27 #include <linux/fs.h>
28 #include <linux/types.h>
29 #include <linux/string.h>
30 #include <linux/netdevice.h>
31 #include <linux/inetdevice.h>
32 #include <linux/in.h>
33 #include <linux/sysfs.h>
34 #include <linux/ctype.h>
35 #include <linux/inet.h>
36 #include <linux/rtnetlink.h>
37 #include <net/net_namespace.h>
38
39 /* #define BONDING_DEBUG 1 */
40 #include "bonding.h"
41 #define to_dev(obj)     container_of(obj,struct device,kobj)
42 #define to_bond(cd)     ((struct bonding *)(to_net_dev(cd)->priv))
43
44 /*---------------------------- Declarations -------------------------------*/
45
46
47 extern struct list_head bond_dev_list;
48 extern struct bond_params bonding_defaults;
49 extern struct bond_parm_tbl bond_mode_tbl[];
50 extern struct bond_parm_tbl bond_lacp_tbl[];
51 extern struct bond_parm_tbl xmit_hashtype_tbl[];
52 extern struct bond_parm_tbl arp_validate_tbl[];
53
54 static int expected_refcount = -1;
55 static struct class *netdev_class;
56 /*--------------------------- Data Structures -----------------------------*/
57
58 /* Bonding sysfs lock.  Why can't we just use the subsystem lock?
59  * Because kobject_register tries to acquire the subsystem lock.  If
60  * we already hold the lock (which we would if the user was creating
61  * a new bond through the sysfs interface), we deadlock.
62  * This lock is only needed when deleting a bond - we need to make sure
63  * that we don't collide with an ongoing ioctl.
64  */
65
66 struct rw_semaphore bonding_rwsem;
67
68
69
70
71 /*------------------------------ Functions --------------------------------*/
72
73 /*
74  * "show" function for the bond_masters attribute.
75  * The class parameter is ignored.
76  */
77 static ssize_t bonding_show_bonds(struct class *cls, char *buffer)
78 {
79         int res = 0;
80         struct bonding *bond;
81
82         down_read(&(bonding_rwsem));
83
84         list_for_each_entry(bond, &bond_dev_list, bond_list) {
85                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
86                         /* not enough space for another interface name */
87                         if ((PAGE_SIZE - res) > 10)
88                                 res = PAGE_SIZE - 10;
89                         res += sprintf(buffer + res, "++more++");
90                         break;
91                 }
92                 res += sprintf(buffer + res, "%s ",
93                                bond->dev->name);
94         }
95         res += sprintf(buffer + res, "\n");
96         res++;
97         up_read(&(bonding_rwsem));
98         return res;
99 }
100
101 /*
102  * "store" function for the bond_masters attribute.  This is what
103  * creates and deletes entire bonds.
104  *
105  * The class parameter is ignored.
106  *
107  */
108
109 static ssize_t bonding_store_bonds(struct class *cls, const char *buffer, size_t count)
110 {
111         char command[IFNAMSIZ + 1] = {0, };
112         char *ifname;
113         int res = count;
114         struct bonding *bond;
115         struct bonding *nxt;
116
117         down_write(&(bonding_rwsem));
118         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
119         ifname = command + 1;
120         if ((strlen(command) <= 1) ||
121             !dev_valid_name(ifname))
122                 goto err_no_cmd;
123
124         if (command[0] == '+') {
125
126                 /* Check to see if the bond already exists. */
127                 list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list)
128                         if (strnicmp(bond->dev->name, ifname, IFNAMSIZ) == 0) {
129                                 printk(KERN_ERR DRV_NAME
130                                         ": cannot add bond %s; it already exists\n",
131                                         ifname);
132                                 res = -EPERM;
133                                 goto out;
134                         }
135
136                 printk(KERN_INFO DRV_NAME
137                         ": %s is being created...\n", ifname);
138                 if (bond_create(ifname, &bonding_defaults, &bond)) {
139                         printk(KERN_INFO DRV_NAME
140                         ": %s interface already exists. Bond creation failed.\n",
141                         ifname);
142                         res = -EPERM;
143                 }
144                 goto out;
145         }
146
147         if (command[0] == '-') {
148                 list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list)
149                         if (strnicmp(bond->dev->name, ifname, IFNAMSIZ) == 0) {
150                                 rtnl_lock();
151                                 /* check the ref count on the bond's kobject.
152                                  * If it's > expected, then there's a file open,
153                                  * and we have to fail.
154                                  */
155                                 if (atomic_read(&bond->dev->dev.kobj.kref.refcount)
156                                                         > expected_refcount){
157                                         rtnl_unlock();
158                                         printk(KERN_INFO DRV_NAME
159                                                 ": Unable remove bond %s due to open references.\n",
160                                                 ifname);
161                                         res = -EPERM;
162                                         goto out;
163                                 }
164                                 printk(KERN_INFO DRV_NAME
165                                         ": %s is being deleted...\n",
166                                         bond->dev->name);
167                                 bond_destroy(bond);
168                                 rtnl_unlock();
169                                 goto out;
170                         }
171
172                 printk(KERN_ERR DRV_NAME
173                         ": unable to delete non-existent bond %s\n", ifname);
174                 res = -ENODEV;
175                 goto out;
176         }
177
178 err_no_cmd:
179         printk(KERN_ERR DRV_NAME
180                 ": no command found in bonding_masters. Use +ifname or -ifname.\n");
181         res = -EPERM;
182
183         /* Always return either count or an error.  If you return 0, you'll
184          * get called forever, which is bad.
185          */
186 out:
187         up_write(&(bonding_rwsem));
188         return res;
189 }
190 /* class attribute for bond_masters file.  This ends up in /sys/class/net */
191 static CLASS_ATTR(bonding_masters,  S_IWUSR | S_IRUGO,
192                   bonding_show_bonds, bonding_store_bonds);
193
194 int bond_create_slave_symlinks(struct net_device *master, struct net_device *slave)
195 {
196         char linkname[IFNAMSIZ+7];
197         int ret = 0;
198
199         /* first, create a link from the slave back to the master */
200         ret = sysfs_create_link(&(slave->dev.kobj), &(master->dev.kobj),
201                                 "master");
202         if (ret)
203                 return ret;
204         /* next, create a link from the master to the slave */
205         sprintf(linkname,"slave_%s",slave->name);
206         ret = sysfs_create_link(&(master->dev.kobj), &(slave->dev.kobj),
207                                 linkname);
208         return ret;
209
210 }
211
212 void bond_destroy_slave_symlinks(struct net_device *master, struct net_device *slave)
213 {
214         char linkname[IFNAMSIZ+7];
215
216         sysfs_remove_link(&(slave->dev.kobj), "master");
217         sprintf(linkname,"slave_%s",slave->name);
218         sysfs_remove_link(&(master->dev.kobj), linkname);
219 }
220
221
222 /*
223  * Show the slaves in the current bond.
224  */
225 static ssize_t bonding_show_slaves(struct device *d,
226                                    struct device_attribute *attr, char *buf)
227 {
228         struct slave *slave;
229         int i, res = 0;
230         struct bonding *bond = to_bond(d);
231
232         read_lock_bh(&bond->lock);
233         bond_for_each_slave(bond, slave, i) {
234                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
235                         /* not enough space for another interface name */
236                         if ((PAGE_SIZE - res) > 10)
237                                 res = PAGE_SIZE - 10;
238                         res += sprintf(buf + res, "++more++");
239                         break;
240                 }
241                 res += sprintf(buf + res, "%s ", slave->dev->name);
242         }
243         read_unlock_bh(&bond->lock);
244         res += sprintf(buf + res, "\n");
245         res++;
246         return res;
247 }
248
249 /*
250  * Set the slaves in the current bond.  The bond interface must be
251  * up for this to succeed.
252  * This function is largely the same flow as bonding_update_bonds().
253  */
254 static ssize_t bonding_store_slaves(struct device *d,
255                                     struct device_attribute *attr,
256                                     const char *buffer, size_t count)
257 {
258         char command[IFNAMSIZ + 1] = { 0, };
259         char *ifname;
260         int i, res, found, ret = count;
261         u32 original_mtu;
262         struct slave *slave;
263         struct net_device *dev = NULL;
264         struct bonding *bond = to_bond(d);
265
266         /* Quick sanity check -- is the bond interface up? */
267         if (!(bond->dev->flags & IFF_UP)) {
268                 printk(KERN_WARNING DRV_NAME
269                        ": %s: doing slave updates when interface is down.\n",
270                        bond->dev->name);
271         }
272
273         /* Note:  We can't hold bond->lock here, as bond_create grabs it. */
274
275         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
276         ifname = command + 1;
277         if ((strlen(command) <= 1) ||
278             !dev_valid_name(ifname))
279                 goto err_no_cmd;
280
281         if (command[0] == '+') {
282
283                 /* Got a slave name in ifname.  Is it already in the list? */
284                 found = 0;
285                 read_lock_bh(&bond->lock);
286                 bond_for_each_slave(bond, slave, i)
287                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
288                                 printk(KERN_ERR DRV_NAME
289                                        ": %s: Interface %s is already enslaved!\n",
290                                        bond->dev->name, ifname);
291                                 ret = -EPERM;
292                                 read_unlock_bh(&bond->lock);
293                                 goto out;
294                         }
295
296                 read_unlock_bh(&bond->lock);
297                 printk(KERN_INFO DRV_NAME ": %s: Adding slave %s.\n",
298                        bond->dev->name, ifname);
299                 dev = dev_get_by_name(&init_net, ifname);
300                 if (!dev) {
301                         printk(KERN_INFO DRV_NAME
302                                ": %s: Interface %s does not exist!\n",
303                                bond->dev->name, ifname);
304                         ret = -EPERM;
305                         goto out;
306                 }
307                 else
308                         dev_put(dev);
309
310                 if (dev->flags & IFF_UP) {
311                         printk(KERN_ERR DRV_NAME
312                                ": %s: Error: Unable to enslave %s "
313                                "because it is already up.\n",
314                                bond->dev->name, dev->name);
315                         ret = -EPERM;
316                         goto out;
317                 }
318                 /* If this is the first slave, then we need to set
319                    the master's hardware address to be the same as the
320                    slave's. */
321                 if (!(*((u32 *) & (bond->dev->dev_addr[0])))) {
322                         memcpy(bond->dev->dev_addr, dev->dev_addr,
323                                dev->addr_len);
324                 }
325
326                 /* Set the slave's MTU to match the bond */
327                 original_mtu = dev->mtu;
328                 if (dev->mtu != bond->dev->mtu) {
329                         if (dev->change_mtu) {
330                                 res = dev->change_mtu(dev,
331                                                       bond->dev->mtu);
332                                 if (res) {
333                                         ret = res;
334                                         goto out;
335                                 }
336                         } else {
337                                 dev->mtu = bond->dev->mtu;
338                         }
339                 }
340                 rtnl_lock();
341                 res = bond_enslave(bond->dev, dev);
342                 bond_for_each_slave(bond, slave, i)
343                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0)
344                                 slave->original_mtu = original_mtu;
345                 rtnl_unlock();
346                 if (res) {
347                         ret = res;
348                 }
349                 goto out;
350         }
351
352         if (command[0] == '-') {
353                 dev = NULL;
354                 bond_for_each_slave(bond, slave, i)
355                         if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
356                                 dev = slave->dev;
357                                 original_mtu = slave->original_mtu;
358                                 break;
359                         }
360                 if (dev) {
361                         printk(KERN_INFO DRV_NAME ": %s: Removing slave %s\n",
362                                 bond->dev->name, dev->name);
363                         rtnl_lock();
364                         if (bond->setup_by_slave)
365                                 res = bond_release_and_destroy(bond->dev, dev);
366                         else
367                                 res = bond_release(bond->dev, dev);
368                         rtnl_unlock();
369                         if (res) {
370                                 ret = res;
371                                 goto out;
372                         }
373                         /* set the slave MTU to the default */
374                         if (dev->change_mtu) {
375                                 dev->change_mtu(dev, original_mtu);
376                         } else {
377                                 dev->mtu = original_mtu;
378                         }
379                 }
380                 else {
381                         printk(KERN_ERR DRV_NAME ": unable to remove non-existent slave %s for bond %s.\n",
382                                 ifname, bond->dev->name);
383                         ret = -ENODEV;
384                 }
385                 goto out;
386         }
387
388 err_no_cmd:
389         printk(KERN_ERR DRV_NAME ": no command found in slaves file for bond %s. Use +ifname or -ifname.\n", bond->dev->name);
390         ret = -EPERM;
391
392 out:
393         return ret;
394 }
395
396 static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves, bonding_store_slaves);
397
398 /*
399  * Show and set the bonding mode.  The bond interface must be down to
400  * change the mode.
401  */
402 static ssize_t bonding_show_mode(struct device *d,
403                                  struct device_attribute *attr, char *buf)
404 {
405         struct bonding *bond = to_bond(d);
406
407         return sprintf(buf, "%s %d\n",
408                         bond_mode_tbl[bond->params.mode].modename,
409                         bond->params.mode) + 1;
410 }
411
412 static ssize_t bonding_store_mode(struct device *d,
413                                   struct device_attribute *attr,
414                                   const char *buf, size_t count)
415 {
416         int new_value, ret = count;
417         struct bonding *bond = to_bond(d);
418
419         if (bond->dev->flags & IFF_UP) {
420                 printk(KERN_ERR DRV_NAME
421                        ": unable to update mode of %s because interface is up.\n",
422                        bond->dev->name);
423                 ret = -EPERM;
424                 goto out;
425         }
426
427         new_value = bond_parse_parm((char *)buf, bond_mode_tbl);
428         if (new_value < 0)  {
429                 printk(KERN_ERR DRV_NAME
430                        ": %s: Ignoring invalid mode value %.*s.\n",
431                        bond->dev->name,
432                        (int)strlen(buf) - 1, buf);
433                 ret = -EINVAL;
434                 goto out;
435         } else {
436                 if (bond->params.mode == BOND_MODE_8023AD)
437                         bond_unset_master_3ad_flags(bond);
438
439                 if (bond->params.mode == BOND_MODE_ALB)
440                         bond_unset_master_alb_flags(bond);
441
442                 bond->params.mode = new_value;
443                 bond_set_mode_ops(bond, bond->params.mode);
444                 printk(KERN_INFO DRV_NAME ": %s: setting mode to %s (%d).\n",
445                         bond->dev->name, bond_mode_tbl[new_value].modename, new_value);
446         }
447 out:
448         return ret;
449 }
450 static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR, bonding_show_mode, bonding_store_mode);
451
452 /*
453  * Show and set the bonding transmit hash method.  The bond interface must be down to
454  * change the xmit hash policy.
455  */
456 static ssize_t bonding_show_xmit_hash(struct device *d,
457                                       struct device_attribute *attr,
458                                       char *buf)
459 {
460         int count;
461         struct bonding *bond = to_bond(d);
462
463         if ((bond->params.mode != BOND_MODE_XOR) &&
464             (bond->params.mode != BOND_MODE_8023AD)) {
465                 // Not Applicable
466                 count = sprintf(buf, "NA\n") + 1;
467         } else {
468                 count = sprintf(buf, "%s %d\n",
469                         xmit_hashtype_tbl[bond->params.xmit_policy].modename,
470                         bond->params.xmit_policy) + 1;
471         }
472
473         return count;
474 }
475
476 static ssize_t bonding_store_xmit_hash(struct device *d,
477                                        struct device_attribute *attr,
478                                        const char *buf, size_t count)
479 {
480         int new_value, ret = count;
481         struct bonding *bond = to_bond(d);
482
483         if (bond->dev->flags & IFF_UP) {
484                 printk(KERN_ERR DRV_NAME
485                        "%s: Interface is up. Unable to update xmit policy.\n",
486                        bond->dev->name);
487                 ret = -EPERM;
488                 goto out;
489         }
490
491         if ((bond->params.mode != BOND_MODE_XOR) &&
492             (bond->params.mode != BOND_MODE_8023AD)) {
493                 printk(KERN_ERR DRV_NAME
494                        "%s: Transmit hash policy is irrelevant in this mode.\n",
495                        bond->dev->name);
496                 ret = -EPERM;
497                 goto out;
498         }
499
500         new_value = bond_parse_parm((char *)buf, xmit_hashtype_tbl);
501         if (new_value < 0)  {
502                 printk(KERN_ERR DRV_NAME
503                        ": %s: Ignoring invalid xmit hash policy value %.*s.\n",
504                        bond->dev->name,
505                        (int)strlen(buf) - 1, buf);
506                 ret = -EINVAL;
507                 goto out;
508         } else {
509                 bond->params.xmit_policy = new_value;
510                 bond_set_mode_ops(bond, bond->params.mode);
511                 printk(KERN_INFO DRV_NAME ": %s: setting xmit hash policy to %s (%d).\n",
512                         bond->dev->name, xmit_hashtype_tbl[new_value].modename, new_value);
513         }
514 out:
515         return ret;
516 }
517 static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR, bonding_show_xmit_hash, bonding_store_xmit_hash);
518
519 /*
520  * Show and set arp_validate.
521  */
522 static ssize_t bonding_show_arp_validate(struct device *d,
523                                          struct device_attribute *attr,
524                                          char *buf)
525 {
526         struct bonding *bond = to_bond(d);
527
528         return sprintf(buf, "%s %d\n",
529                        arp_validate_tbl[bond->params.arp_validate].modename,
530                        bond->params.arp_validate) + 1;
531 }
532
533 static ssize_t bonding_store_arp_validate(struct device *d,
534                                           struct device_attribute *attr,
535                                           const char *buf, size_t count)
536 {
537         int new_value;
538         struct bonding *bond = to_bond(d);
539
540         new_value = bond_parse_parm((char *)buf, arp_validate_tbl);
541         if (new_value < 0) {
542                 printk(KERN_ERR DRV_NAME
543                        ": %s: Ignoring invalid arp_validate value %s\n",
544                        bond->dev->name, buf);
545                 return -EINVAL;
546         }
547         if (new_value && (bond->params.mode != BOND_MODE_ACTIVEBACKUP)) {
548                 printk(KERN_ERR DRV_NAME
549                        ": %s: arp_validate only supported in active-backup mode.\n",
550                        bond->dev->name);
551                 return -EINVAL;
552         }
553         printk(KERN_INFO DRV_NAME ": %s: setting arp_validate to %s (%d).\n",
554                bond->dev->name, arp_validate_tbl[new_value].modename,
555                new_value);
556
557         if (!bond->params.arp_validate && new_value) {
558                 bond_register_arp(bond);
559         } else if (bond->params.arp_validate && !new_value) {
560                 bond_unregister_arp(bond);
561         }
562
563         bond->params.arp_validate = new_value;
564
565         return count;
566 }
567
568 static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate, bonding_store_arp_validate);
569
570 /*
571  * Show and store fail_over_mac.  User only allowed to change the
572  * value when there are no slaves.
573  */
574 static ssize_t bonding_show_fail_over_mac(struct device *d, struct device_attribute *attr, char *buf)
575 {
576         struct bonding *bond = to_bond(d);
577
578         return sprintf(buf, "%d\n", bond->params.fail_over_mac) + 1;
579 }
580
581 static ssize_t bonding_store_fail_over_mac(struct device *d, struct device_attribute *attr, const char *buf, size_t count)
582 {
583         int new_value;
584         int ret = count;
585         struct bonding *bond = to_bond(d);
586
587         if (bond->slave_cnt != 0) {
588                 printk(KERN_ERR DRV_NAME
589                        ": %s: Can't alter fail_over_mac with slaves in bond.\n",
590                        bond->dev->name);
591                 ret = -EPERM;
592                 goto out;
593         }
594
595         if (sscanf(buf, "%d", &new_value) != 1) {
596                 printk(KERN_ERR DRV_NAME
597                        ": %s: no fail_over_mac value specified.\n",
598                        bond->dev->name);
599                 ret = -EINVAL;
600                 goto out;
601         }
602
603         if ((new_value == 0) || (new_value == 1)) {
604                 bond->params.fail_over_mac = new_value;
605                 printk(KERN_INFO DRV_NAME ": %s: Setting fail_over_mac to %d.\n",
606                        bond->dev->name, new_value);
607         } else {
608                 printk(KERN_INFO DRV_NAME
609                        ": %s: Ignoring invalid fail_over_mac value %d.\n",
610                        bond->dev->name, new_value);
611         }
612 out:
613         return ret;
614 }
615
616 static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR, bonding_show_fail_over_mac, bonding_store_fail_over_mac);
617
618 /*
619  * Show and set the arp timer interval.  There are two tricky bits
620  * here.  First, if ARP monitoring is activated, then we must disable
621  * MII monitoring.  Second, if the ARP timer isn't running, we must
622  * start it.
623  */
624 static ssize_t bonding_show_arp_interval(struct device *d,
625                                          struct device_attribute *attr,
626                                          char *buf)
627 {
628         struct bonding *bond = to_bond(d);
629
630         return sprintf(buf, "%d\n", bond->params.arp_interval) + 1;
631 }
632
633 static ssize_t bonding_store_arp_interval(struct device *d,
634                                           struct device_attribute *attr,
635                                           const char *buf, size_t count)
636 {
637         int new_value, ret = count;
638         struct bonding *bond = to_bond(d);
639
640         if (sscanf(buf, "%d", &new_value) != 1) {
641                 printk(KERN_ERR DRV_NAME
642                        ": %s: no arp_interval value specified.\n",
643                        bond->dev->name);
644                 ret = -EINVAL;
645                 goto out;
646         }
647         if (new_value < 0) {
648                 printk(KERN_ERR DRV_NAME
649                        ": %s: Invalid arp_interval value %d not in range 1-%d; rejected.\n",
650                        bond->dev->name, new_value, INT_MAX);
651                 ret = -EINVAL;
652                 goto out;
653         }
654
655         printk(KERN_INFO DRV_NAME
656                ": %s: Setting ARP monitoring interval to %d.\n",
657                bond->dev->name, new_value);
658         bond->params.arp_interval = new_value;
659         if (bond->params.miimon) {
660                 printk(KERN_INFO DRV_NAME
661                        ": %s: ARP monitoring cannot be used with MII monitoring. "
662                        "%s Disabling MII monitoring.\n",
663                        bond->dev->name, bond->dev->name);
664                 bond->params.miimon = 0;
665                 /* Kill MII timer, else it brings bond's link down */
666                 if (bond->arp_timer.function) {
667                         printk(KERN_INFO DRV_NAME
668                         ": %s: Kill MII timer, else it brings bond's link down...\n",
669                        bond->dev->name);
670                         del_timer_sync(&bond->mii_timer);
671                 }
672         }
673         if (!bond->params.arp_targets[0]) {
674                 printk(KERN_INFO DRV_NAME
675                        ": %s: ARP monitoring has been set up, "
676                        "but no ARP targets have been specified.\n",
677                        bond->dev->name);
678         }
679         if (bond->dev->flags & IFF_UP) {
680                 /* If the interface is up, we may need to fire off
681                  * the ARP timer.  If the interface is down, the
682                  * timer will get fired off when the open function
683                  * is called.
684                  */
685                 if (bond->arp_timer.function) {
686                         /* The timer's already set up, so fire it off */
687                         mod_timer(&bond->arp_timer, jiffies + 1);
688                 } else {
689                         /* Set up the timer. */
690                         init_timer(&bond->arp_timer);
691                         bond->arp_timer.expires = jiffies + 1;
692                         bond->arp_timer.data =
693                                 (unsigned long) bond->dev;
694                         if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) {
695                                 bond->arp_timer.function =
696                                         (void *)
697                                         &bond_activebackup_arp_mon;
698                         } else {
699                                 bond->arp_timer.function =
700                                         (void *)
701                                         &bond_loadbalance_arp_mon;
702                         }
703                         add_timer(&bond->arp_timer);
704                 }
705         }
706
707 out:
708         return ret;
709 }
710 static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR , bonding_show_arp_interval, bonding_store_arp_interval);
711
712 /*
713  * Show and set the arp targets.
714  */
715 static ssize_t bonding_show_arp_targets(struct device *d,
716                                         struct device_attribute *attr,
717                                         char *buf)
718 {
719         int i, res = 0;
720         struct bonding *bond = to_bond(d);
721
722         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
723                 if (bond->params.arp_targets[i])
724                         res += sprintf(buf + res, "%u.%u.%u.%u ",
725                                NIPQUAD(bond->params.arp_targets[i]));
726         }
727         if (res)
728                 res--;  /* eat the leftover space */
729         res += sprintf(buf + res, "\n");
730         res++;
731         return res;
732 }
733
734 static ssize_t bonding_store_arp_targets(struct device *d,
735                                          struct device_attribute *attr,
736                                          const char *buf, size_t count)
737 {
738         __be32 newtarget;
739         int i = 0, done = 0, ret = count;
740         struct bonding *bond = to_bond(d);
741         __be32 *targets;
742
743         targets = bond->params.arp_targets;
744         newtarget = in_aton(buf + 1);
745         /* look for adds */
746         if (buf[0] == '+') {
747                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
748                         printk(KERN_ERR DRV_NAME
749                                ": %s: invalid ARP target %u.%u.%u.%u specified for addition\n",
750                                bond->dev->name, NIPQUAD(newtarget));
751                         ret = -EINVAL;
752                         goto out;
753                 }
754                 /* look for an empty slot to put the target in, and check for dupes */
755                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
756                         if (targets[i] == newtarget) { /* duplicate */
757                                 printk(KERN_ERR DRV_NAME
758                                        ": %s: ARP target %u.%u.%u.%u is already present\n",
759                                        bond->dev->name, NIPQUAD(newtarget));
760                                 if (done)
761                                         targets[i] = 0;
762                                 ret = -EINVAL;
763                                 goto out;
764                         }
765                         if (targets[i] == 0 && !done) {
766                                 printk(KERN_INFO DRV_NAME
767                                        ": %s: adding ARP target %d.%d.%d.%d.\n",
768                                        bond->dev->name, NIPQUAD(newtarget));
769                                 done = 1;
770                                 targets[i] = newtarget;
771                         }
772                 }
773                 if (!done) {
774                         printk(KERN_ERR DRV_NAME
775                                ": %s: ARP target table is full!\n",
776                                bond->dev->name);
777                         ret = -EINVAL;
778                         goto out;
779                 }
780
781         }
782         else if (buf[0] == '-') {
783                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
784                         printk(KERN_ERR DRV_NAME
785                                ": %s: invalid ARP target %d.%d.%d.%d specified for removal\n",
786                                bond->dev->name, NIPQUAD(newtarget));
787                         ret = -EINVAL;
788                         goto out;
789                 }
790
791                 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
792                         if (targets[i] == newtarget) {
793                                 printk(KERN_INFO DRV_NAME
794                                        ": %s: removing ARP target %d.%d.%d.%d.\n",
795                                        bond->dev->name, NIPQUAD(newtarget));
796                                 targets[i] = 0;
797                                 done = 1;
798                         }
799                 }
800                 if (!done) {
801                         printk(KERN_INFO DRV_NAME
802                                ": %s: unable to remove nonexistent ARP target %d.%d.%d.%d.\n",
803                                bond->dev->name, NIPQUAD(newtarget));
804                         ret = -EINVAL;
805                         goto out;
806                 }
807         }
808         else {
809                 printk(KERN_ERR DRV_NAME ": no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
810                         bond->dev->name);
811                 ret = -EPERM;
812                 goto out;
813         }
814
815 out:
816         return ret;
817 }
818 static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
819
820 /*
821  * Show and set the up and down delays.  These must be multiples of the
822  * MII monitoring value, and are stored internally as the multiplier.
823  * Thus, we must translate to MS for the real world.
824  */
825 static ssize_t bonding_show_downdelay(struct device *d,
826                                       struct device_attribute *attr,
827                                       char *buf)
828 {
829         struct bonding *bond = to_bond(d);
830
831         return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon) + 1;
832 }
833
834 static ssize_t bonding_store_downdelay(struct device *d,
835                                        struct device_attribute *attr,
836                                        const char *buf, size_t count)
837 {
838         int new_value, ret = count;
839         struct bonding *bond = to_bond(d);
840
841         if (!(bond->params.miimon)) {
842                 printk(KERN_ERR DRV_NAME
843                        ": %s: Unable to set down delay as MII monitoring is disabled\n",
844                        bond->dev->name);
845                 ret = -EPERM;
846                 goto out;
847         }
848
849         if (sscanf(buf, "%d", &new_value) != 1) {
850                 printk(KERN_ERR DRV_NAME
851                        ": %s: no down delay value specified.\n",
852                        bond->dev->name);
853                 ret = -EINVAL;
854                 goto out;
855         }
856         if (new_value < 0) {
857                 printk(KERN_ERR DRV_NAME
858                        ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
859                        bond->dev->name, new_value, 1, INT_MAX);
860                 ret = -EINVAL;
861                 goto out;
862         } else {
863                 if ((new_value % bond->params.miimon) != 0) {
864                         printk(KERN_WARNING DRV_NAME
865                                ": %s: Warning: down delay (%d) is not a multiple "
866                                "of miimon (%d), delay rounded to %d ms\n",
867                                bond->dev->name, new_value, bond->params.miimon,
868                                (new_value / bond->params.miimon) *
869                                bond->params.miimon);
870                 }
871                 bond->params.downdelay = new_value / bond->params.miimon;
872                 printk(KERN_INFO DRV_NAME ": %s: Setting down delay to %d.\n",
873                        bond->dev->name, bond->params.downdelay * bond->params.miimon);
874
875         }
876
877 out:
878         return ret;
879 }
880 static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR , bonding_show_downdelay, bonding_store_downdelay);
881
882 static ssize_t bonding_show_updelay(struct device *d,
883                                     struct device_attribute *attr,
884                                     char *buf)
885 {
886         struct bonding *bond = to_bond(d);
887
888         return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon) + 1;
889
890 }
891
892 static ssize_t bonding_store_updelay(struct device *d,
893                                      struct device_attribute *attr,
894                                      const char *buf, size_t count)
895 {
896         int new_value, ret = count;
897         struct bonding *bond = to_bond(d);
898
899         if (!(bond->params.miimon)) {
900                 printk(KERN_ERR DRV_NAME
901                        ": %s: Unable to set up delay as MII monitoring is disabled\n",
902                        bond->dev->name);
903                 ret = -EPERM;
904                 goto out;
905         }
906
907         if (sscanf(buf, "%d", &new_value) != 1) {
908                 printk(KERN_ERR DRV_NAME
909                        ": %s: no up delay value specified.\n",
910                        bond->dev->name);
911                 ret = -EINVAL;
912                 goto out;
913         }
914         if (new_value < 0) {
915                 printk(KERN_ERR DRV_NAME
916                        ": %s: Invalid down delay value %d not in range %d-%d; rejected.\n",
917                        bond->dev->name, new_value, 1, INT_MAX);
918                 ret = -EINVAL;
919                 goto out;
920         } else {
921                 if ((new_value % bond->params.miimon) != 0) {
922                         printk(KERN_WARNING DRV_NAME
923                                ": %s: Warning: up delay (%d) is not a multiple "
924                                "of miimon (%d), updelay rounded to %d ms\n",
925                                bond->dev->name, new_value, bond->params.miimon,
926                                (new_value / bond->params.miimon) *
927                                bond->params.miimon);
928                 }
929                 bond->params.updelay = new_value / bond->params.miimon;
930                 printk(KERN_INFO DRV_NAME ": %s: Setting up delay to %d.\n",
931                        bond->dev->name, bond->params.updelay * bond->params.miimon);
932
933         }
934
935 out:
936         return ret;
937 }
938 static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR , bonding_show_updelay, bonding_store_updelay);
939
940 /*
941  * Show and set the LACP interval.  Interface must be down, and the mode
942  * must be set to 802.3ad mode.
943  */
944 static ssize_t bonding_show_lacp(struct device *d,
945                                  struct device_attribute *attr,
946                                  char *buf)
947 {
948         struct bonding *bond = to_bond(d);
949
950         return sprintf(buf, "%s %d\n",
951                 bond_lacp_tbl[bond->params.lacp_fast].modename,
952                 bond->params.lacp_fast) + 1;
953 }
954
955 static ssize_t bonding_store_lacp(struct device *d,
956                                   struct device_attribute *attr,
957                                   const char *buf, size_t count)
958 {
959         int new_value, ret = count;
960         struct bonding *bond = to_bond(d);
961
962         if (bond->dev->flags & IFF_UP) {
963                 printk(KERN_ERR DRV_NAME
964                        ": %s: Unable to update LACP rate because interface is up.\n",
965                        bond->dev->name);
966                 ret = -EPERM;
967                 goto out;
968         }
969
970         if (bond->params.mode != BOND_MODE_8023AD) {
971                 printk(KERN_ERR DRV_NAME
972                        ": %s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
973                        bond->dev->name);
974                 ret = -EPERM;
975                 goto out;
976         }
977
978         new_value = bond_parse_parm((char *)buf, bond_lacp_tbl);
979
980         if ((new_value == 1) || (new_value == 0)) {
981                 bond->params.lacp_fast = new_value;
982                 printk(KERN_INFO DRV_NAME
983                        ": %s: Setting LACP rate to %s (%d).\n",
984                        bond->dev->name, bond_lacp_tbl[new_value].modename, new_value);
985         } else {
986                 printk(KERN_ERR DRV_NAME
987                        ": %s: Ignoring invalid LACP rate value %.*s.\n",
988                         bond->dev->name, (int)strlen(buf) - 1, buf);
989                 ret = -EINVAL;
990         }
991 out:
992         return ret;
993 }
994 static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR, bonding_show_lacp, bonding_store_lacp);
995
996 /*
997  * Show and set the MII monitor interval.  There are two tricky bits
998  * here.  First, if MII monitoring is activated, then we must disable
999  * ARP monitoring.  Second, if the timer isn't running, we must
1000  * start it.
1001  */
1002 static ssize_t bonding_show_miimon(struct device *d,
1003                                    struct device_attribute *attr,
1004                                    char *buf)
1005 {
1006         struct bonding *bond = to_bond(d);
1007
1008         return sprintf(buf, "%d\n", bond->params.miimon) + 1;
1009 }
1010
1011 static ssize_t bonding_store_miimon(struct device *d,
1012                                     struct device_attribute *attr,
1013                                     const char *buf, size_t count)
1014 {
1015         int new_value, ret = count;
1016         struct bonding *bond = to_bond(d);
1017
1018         if (sscanf(buf, "%d", &new_value) != 1) {
1019                 printk(KERN_ERR DRV_NAME
1020                        ": %s: no miimon value specified.\n",
1021                        bond->dev->name);
1022                 ret = -EINVAL;
1023                 goto out;
1024         }
1025         if (new_value < 0) {
1026                 printk(KERN_ERR DRV_NAME
1027                        ": %s: Invalid miimon value %d not in range %d-%d; rejected.\n",
1028                        bond->dev->name, new_value, 1, INT_MAX);
1029                 ret = -EINVAL;
1030                 goto out;
1031         } else {
1032                 printk(KERN_INFO DRV_NAME
1033                        ": %s: Setting MII monitoring interval to %d.\n",
1034                        bond->dev->name, new_value);
1035                 bond->params.miimon = new_value;
1036                 if(bond->params.updelay)
1037                         printk(KERN_INFO DRV_NAME
1038                               ": %s: Note: Updating updelay (to %d) "
1039                               "since it is a multiple of the miimon value.\n",
1040                               bond->dev->name,
1041                               bond->params.updelay * bond->params.miimon);
1042                 if(bond->params.downdelay)
1043                         printk(KERN_INFO DRV_NAME
1044                               ": %s: Note: Updating downdelay (to %d) "
1045                               "since it is a multiple of the miimon value.\n",
1046                               bond->dev->name,
1047                               bond->params.downdelay * bond->params.miimon);
1048                 if (bond->params.arp_interval) {
1049                         printk(KERN_INFO DRV_NAME
1050                                ": %s: MII monitoring cannot be used with "
1051                                "ARP monitoring. Disabling ARP monitoring...\n",
1052                                bond->dev->name);
1053                         bond->params.arp_interval = 0;
1054                         if (bond->params.arp_validate) {
1055                                 bond_unregister_arp(bond);
1056                                 bond->params.arp_validate =
1057                                         BOND_ARP_VALIDATE_NONE;
1058                         }
1059                         /* Kill ARP timer, else it brings bond's link down */
1060                         if (bond->mii_timer.function) {
1061                                 printk(KERN_INFO DRV_NAME
1062                                 ": %s: Kill ARP timer, else it brings bond's link down...\n",
1063                                bond->dev->name);
1064                                 del_timer_sync(&bond->arp_timer);
1065                         }
1066                 }
1067
1068                 if (bond->dev->flags & IFF_UP) {
1069                         /* If the interface is up, we may need to fire off
1070                          * the MII timer. If the interface is down, the
1071                          * timer will get fired off when the open function
1072                          * is called.
1073                          */
1074                         if (bond->mii_timer.function) {
1075                                 /* The timer's already set up, so fire it off */
1076                                 mod_timer(&bond->mii_timer, jiffies + 1);
1077                         } else {
1078                                 /* Set up the timer. */
1079                                 init_timer(&bond->mii_timer);
1080                                 bond->mii_timer.expires = jiffies + 1;
1081                                 bond->mii_timer.data =
1082                                         (unsigned long) bond->dev;
1083                                 bond->mii_timer.function =
1084                                         (void *) &bond_mii_monitor;
1085                                 add_timer(&bond->mii_timer);
1086                         }
1087                 }
1088         }
1089 out:
1090         return ret;
1091 }
1092 static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR, bonding_show_miimon, bonding_store_miimon);
1093
1094 /*
1095  * Show and set the primary slave.  The store function is much
1096  * simpler than bonding_store_slaves function because it only needs to
1097  * handle one interface name.
1098  * The bond must be a mode that supports a primary for this be
1099  * set.
1100  */
1101 static ssize_t bonding_show_primary(struct device *d,
1102                                     struct device_attribute *attr,
1103                                     char *buf)
1104 {
1105         int count = 0;
1106         struct bonding *bond = to_bond(d);
1107
1108         if (bond->primary_slave)
1109                 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name) + 1;
1110         else
1111                 count = sprintf(buf, "\n") + 1;
1112
1113         return count;
1114 }
1115
1116 static ssize_t bonding_store_primary(struct device *d,
1117                                      struct device_attribute *attr,
1118                                      const char *buf, size_t count)
1119 {
1120         int i;
1121         struct slave *slave;
1122         struct bonding *bond = to_bond(d);
1123
1124         write_lock_bh(&bond->lock);
1125         if (!USES_PRIMARY(bond->params.mode)) {
1126                 printk(KERN_INFO DRV_NAME
1127                        ": %s: Unable to set primary slave; %s is in mode %d\n",
1128                        bond->dev->name, bond->dev->name, bond->params.mode);
1129         } else {
1130                 bond_for_each_slave(bond, slave, i) {
1131                         if (strnicmp
1132                             (slave->dev->name, buf,
1133                              strlen(slave->dev->name)) == 0) {
1134                                 printk(KERN_INFO DRV_NAME
1135                                        ": %s: Setting %s as primary slave.\n",
1136                                        bond->dev->name, slave->dev->name);
1137                                 bond->primary_slave = slave;
1138                                 bond_select_active_slave(bond);
1139                                 goto out;
1140                         }
1141                 }
1142
1143                 /* if we got here, then we didn't match the name of any slave */
1144
1145                 if (strlen(buf) == 0 || buf[0] == '\n') {
1146                         printk(KERN_INFO DRV_NAME
1147                                ": %s: Setting primary slave to None.\n",
1148                                bond->dev->name);
1149                         bond->primary_slave = NULL;
1150                                 bond_select_active_slave(bond);
1151                 } else {
1152                         printk(KERN_INFO DRV_NAME
1153                                ": %s: Unable to set %.*s as primary slave as it is not a slave.\n",
1154                                bond->dev->name, (int)strlen(buf) - 1, buf);
1155                 }
1156         }
1157 out:
1158         write_unlock_bh(&bond->lock);
1159         return count;
1160 }
1161 static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR, bonding_show_primary, bonding_store_primary);
1162
1163 /*
1164  * Show and set the use_carrier flag.
1165  */
1166 static ssize_t bonding_show_carrier(struct device *d,
1167                                     struct device_attribute *attr,
1168                                     char *buf)
1169 {
1170         struct bonding *bond = to_bond(d);
1171
1172         return sprintf(buf, "%d\n", bond->params.use_carrier) + 1;
1173 }
1174
1175 static ssize_t bonding_store_carrier(struct device *d,
1176                                      struct device_attribute *attr,
1177                                      const char *buf, size_t count)
1178 {
1179         int new_value, ret = count;
1180         struct bonding *bond = to_bond(d);
1181
1182
1183         if (sscanf(buf, "%d", &new_value) != 1) {
1184                 printk(KERN_ERR DRV_NAME
1185                        ": %s: no use_carrier value specified.\n",
1186                        bond->dev->name);
1187                 ret = -EINVAL;
1188                 goto out;
1189         }
1190         if ((new_value == 0) || (new_value == 1)) {
1191                 bond->params.use_carrier = new_value;
1192                 printk(KERN_INFO DRV_NAME ": %s: Setting use_carrier to %d.\n",
1193                        bond->dev->name, new_value);
1194         } else {
1195                 printk(KERN_INFO DRV_NAME
1196                        ": %s: Ignoring invalid use_carrier value %d.\n",
1197                        bond->dev->name, new_value);
1198         }
1199 out:
1200         return count;
1201 }
1202 static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR, bonding_show_carrier, bonding_store_carrier);
1203
1204
1205 /*
1206  * Show and set currently active_slave.
1207  */
1208 static ssize_t bonding_show_active_slave(struct device *d,
1209                                          struct device_attribute *attr,
1210                                          char *buf)
1211 {
1212         struct slave *curr;
1213         struct bonding *bond = to_bond(d);
1214         int count;
1215
1216
1217         read_lock(&bond->curr_slave_lock);
1218         curr = bond->curr_active_slave;
1219         read_unlock(&bond->curr_slave_lock);
1220
1221         if (USES_PRIMARY(bond->params.mode) && curr)
1222                 count = sprintf(buf, "%s\n", curr->dev->name) + 1;
1223         else
1224                 count = sprintf(buf, "\n") + 1;
1225         return count;
1226 }
1227
1228 static ssize_t bonding_store_active_slave(struct device *d,
1229                                           struct device_attribute *attr,
1230                                           const char *buf, size_t count)
1231 {
1232         int i;
1233         struct slave *slave;
1234         struct slave *old_active = NULL;
1235         struct slave *new_active = NULL;
1236         struct bonding *bond = to_bond(d);
1237
1238         write_lock_bh(&bond->lock);
1239         if (!USES_PRIMARY(bond->params.mode)) {
1240                 printk(KERN_INFO DRV_NAME
1241                        ": %s: Unable to change active slave; %s is in mode %d\n",
1242                        bond->dev->name, bond->dev->name, bond->params.mode);
1243         } else {
1244                 bond_for_each_slave(bond, slave, i) {
1245                         if (strnicmp
1246                             (slave->dev->name, buf,
1247                              strlen(slave->dev->name)) == 0) {
1248                                 old_active = bond->curr_active_slave;
1249                                 new_active = slave;
1250                                 if (new_active == old_active) {
1251                                         /* do nothing */
1252                                         printk(KERN_INFO DRV_NAME
1253                                                ": %s: %s is already the current active slave.\n",
1254                                                bond->dev->name, slave->dev->name);
1255                                         goto out;
1256                                 }
1257                                 else {
1258                                         if ((new_active) &&
1259                                             (old_active) &&
1260                                             (new_active->link == BOND_LINK_UP) &&
1261                                             IS_UP(new_active->dev)) {
1262                                                 printk(KERN_INFO DRV_NAME
1263                                                       ": %s: Setting %s as active slave.\n",
1264                                                       bond->dev->name, slave->dev->name);
1265                                                 bond_change_active_slave(bond, new_active);
1266                                         }
1267                                         else {
1268                                                 printk(KERN_INFO DRV_NAME
1269                                                       ": %s: Could not set %s as active slave; "
1270                                                       "either %s is down or the link is down.\n",
1271                                                       bond->dev->name, slave->dev->name,
1272                                                       slave->dev->name);
1273                                         }
1274                                         goto out;
1275                                 }
1276                         }
1277                 }
1278
1279                 /* if we got here, then we didn't match the name of any slave */
1280
1281                 if (strlen(buf) == 0 || buf[0] == '\n') {
1282                         printk(KERN_INFO DRV_NAME
1283                                ": %s: Setting active slave to None.\n",
1284                                bond->dev->name);
1285                         bond->primary_slave = NULL;
1286                                 bond_select_active_slave(bond);
1287                 } else {
1288                         printk(KERN_INFO DRV_NAME
1289                                ": %s: Unable to set %.*s as active slave as it is not a slave.\n",
1290                                bond->dev->name, (int)strlen(buf) - 1, buf);
1291                 }
1292         }
1293 out:
1294         write_unlock_bh(&bond->lock);
1295         return count;
1296
1297 }
1298 static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR, bonding_show_active_slave, bonding_store_active_slave);
1299
1300
1301 /*
1302  * Show link status of the bond interface.
1303  */
1304 static ssize_t bonding_show_mii_status(struct device *d,
1305                                        struct device_attribute *attr,
1306                                        char *buf)
1307 {
1308         struct slave *curr;
1309         struct bonding *bond = to_bond(d);
1310
1311         read_lock(&bond->curr_slave_lock);
1312         curr = bond->curr_active_slave;
1313         read_unlock(&bond->curr_slave_lock);
1314
1315         return sprintf(buf, "%s\n", (curr) ? "up" : "down") + 1;
1316 }
1317 static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1318
1319
1320 /*
1321  * Show current 802.3ad aggregator ID.
1322  */
1323 static ssize_t bonding_show_ad_aggregator(struct device *d,
1324                                           struct device_attribute *attr,
1325                                           char *buf)
1326 {
1327         int count = 0;
1328         struct bonding *bond = to_bond(d);
1329
1330         if (bond->params.mode == BOND_MODE_8023AD) {
1331                 struct ad_info ad_info;
1332                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.aggregator_id) + 1;
1333         }
1334         else
1335                 count = sprintf(buf, "\n") + 1;
1336
1337         return count;
1338 }
1339 static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1340
1341
1342 /*
1343  * Show number of active 802.3ad ports.
1344  */
1345 static ssize_t bonding_show_ad_num_ports(struct device *d,
1346                                          struct device_attribute *attr,
1347                                          char *buf)
1348 {
1349         int count = 0;
1350         struct bonding *bond = to_bond(d);
1351
1352         if (bond->params.mode == BOND_MODE_8023AD) {
1353                 struct ad_info ad_info;
1354                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0: ad_info.ports) + 1;
1355         }
1356         else
1357                 count = sprintf(buf, "\n") + 1;
1358
1359         return count;
1360 }
1361 static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1362
1363
1364 /*
1365  * Show current 802.3ad actor key.
1366  */
1367 static ssize_t bonding_show_ad_actor_key(struct device *d,
1368                                          struct device_attribute *attr,
1369                                          char *buf)
1370 {
1371         int count = 0;
1372         struct bonding *bond = to_bond(d);
1373
1374         if (bond->params.mode == BOND_MODE_8023AD) {
1375                 struct ad_info ad_info;
1376                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.actor_key) + 1;
1377         }
1378         else
1379                 count = sprintf(buf, "\n") + 1;
1380
1381         return count;
1382 }
1383 static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1384
1385
1386 /*
1387  * Show current 802.3ad partner key.
1388  */
1389 static ssize_t bonding_show_ad_partner_key(struct device *d,
1390                                            struct device_attribute *attr,
1391                                            char *buf)
1392 {
1393         int count = 0;
1394         struct bonding *bond = to_bond(d);
1395
1396         if (bond->params.mode == BOND_MODE_8023AD) {
1397                 struct ad_info ad_info;
1398                 count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.partner_key) + 1;
1399         }
1400         else
1401                 count = sprintf(buf, "\n") + 1;
1402
1403         return count;
1404 }
1405 static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1406
1407
1408 /*
1409  * Show current 802.3ad partner mac.
1410  */
1411 static ssize_t bonding_show_ad_partner_mac(struct device *d,
1412                                            struct device_attribute *attr,
1413                                            char *buf)
1414 {
1415         int count = 0;
1416         struct bonding *bond = to_bond(d);
1417         DECLARE_MAC_BUF(mac);
1418
1419         if (bond->params.mode == BOND_MODE_8023AD) {
1420                 struct ad_info ad_info;
1421                 if (!bond_3ad_get_active_agg_info(bond, &ad_info)) {
1422                         count = sprintf(buf,"%s\n",
1423                                         print_mac(mac, ad_info.partner_system))
1424                                 + 1;
1425                 }
1426         }
1427         else
1428                 count = sprintf(buf, "\n") + 1;
1429
1430         return count;
1431 }
1432 static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1433
1434
1435
1436 static struct attribute *per_bond_attrs[] = {
1437         &dev_attr_slaves.attr,
1438         &dev_attr_mode.attr,
1439         &dev_attr_fail_over_mac.attr,
1440         &dev_attr_arp_validate.attr,
1441         &dev_attr_arp_interval.attr,
1442         &dev_attr_arp_ip_target.attr,
1443         &dev_attr_downdelay.attr,
1444         &dev_attr_updelay.attr,
1445         &dev_attr_lacp_rate.attr,
1446         &dev_attr_xmit_hash_policy.attr,
1447         &dev_attr_miimon.attr,
1448         &dev_attr_primary.attr,
1449         &dev_attr_use_carrier.attr,
1450         &dev_attr_active_slave.attr,
1451         &dev_attr_mii_status.attr,
1452         &dev_attr_ad_aggregator.attr,
1453         &dev_attr_ad_num_ports.attr,
1454         &dev_attr_ad_actor_key.attr,
1455         &dev_attr_ad_partner_key.attr,
1456         &dev_attr_ad_partner_mac.attr,
1457         NULL,
1458 };
1459
1460 static struct attribute_group bonding_group = {
1461         .name = "bonding",
1462         .attrs = per_bond_attrs,
1463 };
1464
1465 /*
1466  * Initialize sysfs.  This sets up the bonding_masters file in
1467  * /sys/class/net.
1468  */
1469 int bond_create_sysfs(void)
1470 {
1471         int ret = 0;
1472         struct bonding *firstbond;
1473
1474         init_rwsem(&bonding_rwsem);
1475
1476         /* get the netdev class pointer */
1477         firstbond = container_of(bond_dev_list.next, struct bonding, bond_list);
1478         if (!firstbond)
1479                 return -ENODEV;
1480
1481         netdev_class = firstbond->dev->dev.class;
1482         if (!netdev_class)
1483                 return -ENODEV;
1484
1485         ret = class_create_file(netdev_class, &class_attr_bonding_masters);
1486         /*
1487          * Permit multiple loads of the module by ignoring failures to
1488          * create the bonding_masters sysfs file.  Bonding devices
1489          * created by second or subsequent loads of the module will
1490          * not be listed in, or controllable by, bonding_masters, but
1491          * will have the usual "bonding" sysfs directory.
1492          *
1493          * This is done to preserve backwards compatibility for
1494          * initscripts/sysconfig, which load bonding multiple times to
1495          * configure multiple bonding devices.
1496          */
1497         if (ret == -EEXIST) {
1498                 netdev_class = NULL;
1499                 return 0;
1500         }
1501
1502         return ret;
1503
1504 }
1505
1506 /*
1507  * Remove /sys/class/net/bonding_masters.
1508  */
1509 void bond_destroy_sysfs(void)
1510 {
1511         if (netdev_class)
1512                 class_remove_file(netdev_class, &class_attr_bonding_masters);
1513 }
1514
1515 /*
1516  * Initialize sysfs for each bond.  This sets up and registers
1517  * the 'bondctl' directory for each individual bond under /sys/class/net.
1518  */
1519 int bond_create_sysfs_entry(struct bonding *bond)
1520 {
1521         struct net_device *dev = bond->dev;
1522         int err;
1523
1524         err = sysfs_create_group(&(dev->dev.kobj), &bonding_group);
1525         if (err) {
1526                 printk(KERN_EMERG "eek! didn't create group!\n");
1527         }
1528
1529         if (expected_refcount < 1)
1530                 expected_refcount = atomic_read(&bond->dev->dev.kobj.kref.refcount);
1531
1532         return err;
1533 }
1534 /*
1535  * Remove sysfs entries for each bond.
1536  */
1537 void bond_destroy_sysfs_entry(struct bonding *bond)
1538 {
1539         struct net_device *dev = bond->dev;
1540
1541         sysfs_remove_group(&(dev->dev.kobj), &bonding_group);
1542 }
1543