bonding: add retransmit membership reports tunable
[linux-2.6.git] / drivers / net / bonding / bond_sysfs.c
1 /*
2  * Copyright(c) 2004-2005 Intel Corporation. All rights reserved.
3  *
4  * This program is free software; you can redistribute it and/or modify it
5  * under the terms of the GNU General Public License as published by the
6  * Free Software Foundation; either version 2 of the License, or
7  * (at your option) any later version.
8  *
9  * This program is distributed in the hope that it will be useful, but
10  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
11  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12  * for more details.
13  *
14  * You should have received a copy of the GNU General Public License along
15  * with this program; if not, write to the Free Software Foundation, Inc.,
16  * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
17  *
18  * The full GNU General Public License is included in this distribution in the
19  * file called LICENSE.
20  *
21  */
22
23 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
24
25 #include <linux/kernel.h>
26 #include <linux/module.h>
27 #include <linux/device.h>
28 #include <linux/sched.h>
29 #include <linux/sysdev.h>
30 #include <linux/fs.h>
31 #include <linux/types.h>
32 #include <linux/string.h>
33 #include <linux/netdevice.h>
34 #include <linux/inetdevice.h>
35 #include <linux/in.h>
36 #include <linux/sysfs.h>
37 #include <linux/ctype.h>
38 #include <linux/inet.h>
39 #include <linux/rtnetlink.h>
40 #include <linux/etherdevice.h>
41 #include <net/net_namespace.h>
42 #include <net/netns/generic.h>
43 #include <linux/nsproxy.h>
44
45 #include "bonding.h"
46
47 #define to_dev(obj)     container_of(obj, struct device, kobj)
48 #define to_bond(cd)     ((struct bonding *)(netdev_priv(to_net_dev(cd))))
49
50 /*
51  * "show" function for the bond_masters attribute.
52  * The class parameter is ignored.
53  */
54 static ssize_t bonding_show_bonds(struct class *cls,
55                                   struct class_attribute *attr,
56                                   char *buf)
57 {
58         struct net *net = current->nsproxy->net_ns;
59         struct bond_net *bn = net_generic(net, bond_net_id);
60         int res = 0;
61         struct bonding *bond;
62
63         rtnl_lock();
64
65         list_for_each_entry(bond, &bn->dev_list, bond_list) {
66                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
67                         /* not enough space for another interface name */
68                         if ((PAGE_SIZE - res) > 10)
69                                 res = PAGE_SIZE - 10;
70                         res += sprintf(buf + res, "++more++ ");
71                         break;
72                 }
73                 res += sprintf(buf + res, "%s ", bond->dev->name);
74         }
75         if (res)
76                 buf[res-1] = '\n'; /* eat the leftover space */
77
78         rtnl_unlock();
79         return res;
80 }
81
82 static struct net_device *bond_get_by_name(struct net *net, const char *ifname)
83 {
84         struct bond_net *bn = net_generic(net, bond_net_id);
85         struct bonding *bond;
86
87         list_for_each_entry(bond, &bn->dev_list, bond_list) {
88                 if (strncmp(bond->dev->name, ifname, IFNAMSIZ) == 0)
89                         return bond->dev;
90         }
91         return NULL;
92 }
93
94 /*
95  * "store" function for the bond_masters attribute.  This is what
96  * creates and deletes entire bonds.
97  *
98  * The class parameter is ignored.
99  *
100  */
101
102 static ssize_t bonding_store_bonds(struct class *cls,
103                                    struct class_attribute *attr,
104                                    const char *buffer, size_t count)
105 {
106         struct net *net = current->nsproxy->net_ns;
107         char command[IFNAMSIZ + 1] = {0, };
108         char *ifname;
109         int rv, res = count;
110
111         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
112         ifname = command + 1;
113         if ((strlen(command) <= 1) ||
114             !dev_valid_name(ifname))
115                 goto err_no_cmd;
116
117         if (command[0] == '+') {
118                 pr_info("%s is being created...\n", ifname);
119                 rv = bond_create(net, ifname);
120                 if (rv) {
121                         pr_info("Bond creation failed.\n");
122                         res = rv;
123                 }
124         } else if (command[0] == '-') {
125                 struct net_device *bond_dev;
126
127                 rtnl_lock();
128                 bond_dev = bond_get_by_name(net, ifname);
129                 if (bond_dev) {
130                         pr_info("%s is being deleted...\n", ifname);
131                         unregister_netdevice(bond_dev);
132                 } else {
133                         pr_err("unable to delete non-existent %s\n", ifname);
134                         res = -ENODEV;
135                 }
136                 rtnl_unlock();
137         } else
138                 goto err_no_cmd;
139
140         /* Always return either count or an error.  If you return 0, you'll
141          * get called forever, which is bad.
142          */
143         return res;
144
145 err_no_cmd:
146         pr_err("no command found in bonding_masters. Use +ifname or -ifname.\n");
147         return -EPERM;
148 }
149
150 /* class attribute for bond_masters file.  This ends up in /sys/class/net */
151 static CLASS_ATTR(bonding_masters,  S_IWUSR | S_IRUGO,
152                   bonding_show_bonds, bonding_store_bonds);
153
154 int bond_create_slave_symlinks(struct net_device *master,
155                                struct net_device *slave)
156 {
157         char linkname[IFNAMSIZ+7];
158         int ret = 0;
159
160         /* first, create a link from the slave back to the master */
161         ret = sysfs_create_link(&(slave->dev.kobj), &(master->dev.kobj),
162                                 "master");
163         if (ret)
164                 return ret;
165         /* next, create a link from the master to the slave */
166         sprintf(linkname, "slave_%s", slave->name);
167         ret = sysfs_create_link(&(master->dev.kobj), &(slave->dev.kobj),
168                                 linkname);
169         return ret;
170
171 }
172
173 void bond_destroy_slave_symlinks(struct net_device *master,
174                                  struct net_device *slave)
175 {
176         char linkname[IFNAMSIZ+7];
177
178         sysfs_remove_link(&(slave->dev.kobj), "master");
179         sprintf(linkname, "slave_%s", slave->name);
180         sysfs_remove_link(&(master->dev.kobj), linkname);
181 }
182
183
184 /*
185  * Show the slaves in the current bond.
186  */
187 static ssize_t bonding_show_slaves(struct device *d,
188                                    struct device_attribute *attr, char *buf)
189 {
190         struct slave *slave;
191         int i, res = 0;
192         struct bonding *bond = to_bond(d);
193
194         read_lock(&bond->lock);
195         bond_for_each_slave(bond, slave, i) {
196                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
197                         /* not enough space for another interface name */
198                         if ((PAGE_SIZE - res) > 10)
199                                 res = PAGE_SIZE - 10;
200                         res += sprintf(buf + res, "++more++ ");
201                         break;
202                 }
203                 res += sprintf(buf + res, "%s ", slave->dev->name);
204         }
205         read_unlock(&bond->lock);
206         if (res)
207                 buf[res-1] = '\n'; /* eat the leftover space */
208         return res;
209 }
210
211 /*
212  * Set the slaves in the current bond.  The bond interface must be
213  * up for this to succeed.
214  * This is supposed to be only thin wrapper for bond_enslave and bond_release.
215  * All hard work should be done there.
216  */
217 static ssize_t bonding_store_slaves(struct device *d,
218                                     struct device_attribute *attr,
219                                     const char *buffer, size_t count)
220 {
221         char command[IFNAMSIZ + 1] = { 0, };
222         char *ifname;
223         int res, ret = count;
224         struct net_device *dev;
225         struct bonding *bond = to_bond(d);
226
227         /* Quick sanity check -- is the bond interface up? */
228         if (!(bond->dev->flags & IFF_UP)) {
229                 pr_warning("%s: doing slave updates when interface is down.\n",
230                            bond->dev->name);
231         }
232
233         if (!rtnl_trylock())
234                 return restart_syscall();
235
236         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
237         ifname = command + 1;
238         if ((strlen(command) <= 1) ||
239             !dev_valid_name(ifname))
240                 goto err_no_cmd;
241
242         dev = __dev_get_by_name(dev_net(bond->dev), ifname);
243         if (!dev) {
244                 pr_info("%s: Interface %s does not exist!\n",
245                         bond->dev->name, ifname);
246                 ret = -ENODEV;
247                 goto out;
248         }
249
250         switch (command[0]) {
251         case '+':
252                 pr_info("%s: Adding slave %s.\n", bond->dev->name, dev->name);
253                 res = bond_enslave(bond->dev, dev);
254                 break;
255
256         case '-':
257                 pr_info("%s: Removing slave %s.\n", bond->dev->name, dev->name);
258                 res = bond_release(bond->dev, dev);
259                 break;
260
261         default:
262                 goto err_no_cmd;
263         }
264
265         if (res)
266                 ret = res;
267         goto out;
268
269 err_no_cmd:
270         pr_err("no command found in slaves file for bond %s. Use +ifname or -ifname.\n",
271                bond->dev->name);
272         ret = -EPERM;
273
274 out:
275         rtnl_unlock();
276         return ret;
277 }
278
279 static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves,
280                    bonding_store_slaves);
281
282 /*
283  * Show and set the bonding mode.  The bond interface must be down to
284  * change the mode.
285  */
286 static ssize_t bonding_show_mode(struct device *d,
287                                  struct device_attribute *attr, char *buf)
288 {
289         struct bonding *bond = to_bond(d);
290
291         return sprintf(buf, "%s %d\n",
292                         bond_mode_tbl[bond->params.mode].modename,
293                         bond->params.mode);
294 }
295
296 static ssize_t bonding_store_mode(struct device *d,
297                                   struct device_attribute *attr,
298                                   const char *buf, size_t count)
299 {
300         int new_value, ret = count;
301         struct bonding *bond = to_bond(d);
302
303         if (bond->dev->flags & IFF_UP) {
304                 pr_err("unable to update mode of %s because interface is up.\n",
305                        bond->dev->name);
306                 ret = -EPERM;
307                 goto out;
308         }
309
310         new_value = bond_parse_parm(buf, bond_mode_tbl);
311         if (new_value < 0)  {
312                 pr_err("%s: Ignoring invalid mode value %.*s.\n",
313                        bond->dev->name, (int)strlen(buf) - 1, buf);
314                 ret = -EINVAL;
315                 goto out;
316         }
317         if ((new_value == BOND_MODE_ALB ||
318              new_value == BOND_MODE_TLB) &&
319             bond->params.arp_interval) {
320                 pr_err("%s: %s mode is incompatible with arp monitoring.\n",
321                        bond->dev->name, bond_mode_tbl[new_value].modename);
322                 ret = -EINVAL;
323                 goto out;
324         }
325         if (bond->params.mode == BOND_MODE_8023AD)
326                 bond_unset_master_3ad_flags(bond);
327
328         if (bond->params.mode == BOND_MODE_ALB)
329                 bond_unset_master_alb_flags(bond);
330
331         bond->params.mode = new_value;
332         bond_set_mode_ops(bond, bond->params.mode);
333         pr_info("%s: setting mode to %s (%d).\n",
334                 bond->dev->name, bond_mode_tbl[new_value].modename,
335                 new_value);
336 out:
337         return ret;
338 }
339 static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,
340                    bonding_show_mode, bonding_store_mode);
341
342 /*
343  * Show and set the bonding transmit hash method.
344  * The bond interface must be down to change the xmit hash policy.
345  */
346 static ssize_t bonding_show_xmit_hash(struct device *d,
347                                       struct device_attribute *attr,
348                                       char *buf)
349 {
350         struct bonding *bond = to_bond(d);
351
352         return sprintf(buf, "%s %d\n",
353                        xmit_hashtype_tbl[bond->params.xmit_policy].modename,
354                        bond->params.xmit_policy);
355 }
356
357 static ssize_t bonding_store_xmit_hash(struct device *d,
358                                        struct device_attribute *attr,
359                                        const char *buf, size_t count)
360 {
361         int new_value, ret = count;
362         struct bonding *bond = to_bond(d);
363
364         if (bond->dev->flags & IFF_UP) {
365                 pr_err("%s: Interface is up. Unable to update xmit policy.\n",
366                        bond->dev->name);
367                 ret = -EPERM;
368                 goto out;
369         }
370
371         new_value = bond_parse_parm(buf, xmit_hashtype_tbl);
372         if (new_value < 0)  {
373                 pr_err("%s: Ignoring invalid xmit hash policy value %.*s.\n",
374                        bond->dev->name,
375                        (int)strlen(buf) - 1, buf);
376                 ret = -EINVAL;
377                 goto out;
378         } else {
379                 bond->params.xmit_policy = new_value;
380                 bond_set_mode_ops(bond, bond->params.mode);
381                 pr_info("%s: setting xmit hash policy to %s (%d).\n",
382                         bond->dev->name,
383                         xmit_hashtype_tbl[new_value].modename, new_value);
384         }
385 out:
386         return ret;
387 }
388 static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR,
389                    bonding_show_xmit_hash, bonding_store_xmit_hash);
390
391 /*
392  * Show and set arp_validate.
393  */
394 static ssize_t bonding_show_arp_validate(struct device *d,
395                                          struct device_attribute *attr,
396                                          char *buf)
397 {
398         struct bonding *bond = to_bond(d);
399
400         return sprintf(buf, "%s %d\n",
401                        arp_validate_tbl[bond->params.arp_validate].modename,
402                        bond->params.arp_validate);
403 }
404
405 static ssize_t bonding_store_arp_validate(struct device *d,
406                                           struct device_attribute *attr,
407                                           const char *buf, size_t count)
408 {
409         int new_value;
410         struct bonding *bond = to_bond(d);
411
412         new_value = bond_parse_parm(buf, arp_validate_tbl);
413         if (new_value < 0) {
414                 pr_err("%s: Ignoring invalid arp_validate value %s\n",
415                        bond->dev->name, buf);
416                 return -EINVAL;
417         }
418         if (new_value && (bond->params.mode != BOND_MODE_ACTIVEBACKUP)) {
419                 pr_err("%s: arp_validate only supported in active-backup mode.\n",
420                        bond->dev->name);
421                 return -EINVAL;
422         }
423         pr_info("%s: setting arp_validate to %s (%d).\n",
424                 bond->dev->name, arp_validate_tbl[new_value].modename,
425                 new_value);
426
427         if (!bond->params.arp_validate && new_value)
428                 bond_register_arp(bond);
429         else if (bond->params.arp_validate && !new_value)
430                 bond_unregister_arp(bond);
431
432         bond->params.arp_validate = new_value;
433
434         return count;
435 }
436
437 static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate,
438                    bonding_store_arp_validate);
439
440 /*
441  * Show and store fail_over_mac.  User only allowed to change the
442  * value when there are no slaves.
443  */
444 static ssize_t bonding_show_fail_over_mac(struct device *d,
445                                           struct device_attribute *attr,
446                                           char *buf)
447 {
448         struct bonding *bond = to_bond(d);
449
450         return sprintf(buf, "%s %d\n",
451                        fail_over_mac_tbl[bond->params.fail_over_mac].modename,
452                        bond->params.fail_over_mac);
453 }
454
455 static ssize_t bonding_store_fail_over_mac(struct device *d,
456                                            struct device_attribute *attr,
457                                            const char *buf, size_t count)
458 {
459         int new_value;
460         struct bonding *bond = to_bond(d);
461
462         if (bond->slave_cnt != 0) {
463                 pr_err("%s: Can't alter fail_over_mac with slaves in bond.\n",
464                        bond->dev->name);
465                 return -EPERM;
466         }
467
468         new_value = bond_parse_parm(buf, fail_over_mac_tbl);
469         if (new_value < 0) {
470                 pr_err("%s: Ignoring invalid fail_over_mac value %s.\n",
471                        bond->dev->name, buf);
472                 return -EINVAL;
473         }
474
475         bond->params.fail_over_mac = new_value;
476         pr_info("%s: Setting fail_over_mac to %s (%d).\n",
477                 bond->dev->name, fail_over_mac_tbl[new_value].modename,
478                 new_value);
479
480         return count;
481 }
482
483 static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR,
484                    bonding_show_fail_over_mac, bonding_store_fail_over_mac);
485
486 /*
487  * Show and set the arp timer interval.  There are two tricky bits
488  * here.  First, if ARP monitoring is activated, then we must disable
489  * MII monitoring.  Second, if the ARP timer isn't running, we must
490  * start it.
491  */
492 static ssize_t bonding_show_arp_interval(struct device *d,
493                                          struct device_attribute *attr,
494                                          char *buf)
495 {
496         struct bonding *bond = to_bond(d);
497
498         return sprintf(buf, "%d\n", bond->params.arp_interval);
499 }
500
501 static ssize_t bonding_store_arp_interval(struct device *d,
502                                           struct device_attribute *attr,
503                                           const char *buf, size_t count)
504 {
505         int new_value, ret = count;
506         struct bonding *bond = to_bond(d);
507
508         if (sscanf(buf, "%d", &new_value) != 1) {
509                 pr_err("%s: no arp_interval value specified.\n",
510                        bond->dev->name);
511                 ret = -EINVAL;
512                 goto out;
513         }
514         if (new_value < 0) {
515                 pr_err("%s: Invalid arp_interval value %d not in range 1-%d; rejected.\n",
516                        bond->dev->name, new_value, INT_MAX);
517                 ret = -EINVAL;
518                 goto out;
519         }
520         if (bond->params.mode == BOND_MODE_ALB ||
521             bond->params.mode == BOND_MODE_TLB) {
522                 pr_info("%s: ARP monitoring cannot be used with ALB/TLB. Only MII monitoring is supported on %s.\n",
523                         bond->dev->name, bond->dev->name);
524                 ret = -EINVAL;
525                 goto out;
526         }
527         pr_info("%s: Setting ARP monitoring interval to %d.\n",
528                 bond->dev->name, new_value);
529         bond->params.arp_interval = new_value;
530         if (bond->params.arp_interval)
531                 bond->dev->priv_flags |= IFF_MASTER_ARPMON;
532         if (bond->params.miimon) {
533                 pr_info("%s: ARP monitoring cannot be used with MII monitoring. %s Disabling MII monitoring.\n",
534                         bond->dev->name, bond->dev->name);
535                 bond->params.miimon = 0;
536                 if (delayed_work_pending(&bond->mii_work)) {
537                         cancel_delayed_work(&bond->mii_work);
538                         flush_workqueue(bond->wq);
539                 }
540         }
541         if (!bond->params.arp_targets[0]) {
542                 pr_info("%s: ARP monitoring has been set up, but no ARP targets have been specified.\n",
543                         bond->dev->name);
544         }
545         if (bond->dev->flags & IFF_UP) {
546                 /* If the interface is up, we may need to fire off
547                  * the ARP timer.  If the interface is down, the
548                  * timer will get fired off when the open function
549                  * is called.
550                  */
551                 if (!delayed_work_pending(&bond->arp_work)) {
552                         if (bond->params.mode == BOND_MODE_ACTIVEBACKUP)
553                                 INIT_DELAYED_WORK(&bond->arp_work,
554                                                   bond_activebackup_arp_mon);
555                         else
556                                 INIT_DELAYED_WORK(&bond->arp_work,
557                                                   bond_loadbalance_arp_mon);
558
559                         queue_delayed_work(bond->wq, &bond->arp_work, 0);
560                 }
561         }
562
563 out:
564         return ret;
565 }
566 static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR,
567                    bonding_show_arp_interval, bonding_store_arp_interval);
568
569 /*
570  * Show and set the arp targets.
571  */
572 static ssize_t bonding_show_arp_targets(struct device *d,
573                                         struct device_attribute *attr,
574                                         char *buf)
575 {
576         int i, res = 0;
577         struct bonding *bond = to_bond(d);
578
579         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
580                 if (bond->params.arp_targets[i])
581                         res += sprintf(buf + res, "%pI4 ",
582                                        &bond->params.arp_targets[i]);
583         }
584         if (res)
585                 buf[res-1] = '\n'; /* eat the leftover space */
586         return res;
587 }
588
589 static ssize_t bonding_store_arp_targets(struct device *d,
590                                          struct device_attribute *attr,
591                                          const char *buf, size_t count)
592 {
593         __be32 newtarget;
594         int i = 0, done = 0, ret = count;
595         struct bonding *bond = to_bond(d);
596         __be32 *targets;
597
598         targets = bond->params.arp_targets;
599         newtarget = in_aton(buf + 1);
600         /* look for adds */
601         if (buf[0] == '+') {
602                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
603                         pr_err("%s: invalid ARP target %pI4 specified for addition\n",
604                                bond->dev->name, &newtarget);
605                         ret = -EINVAL;
606                         goto out;
607                 }
608                 /* look for an empty slot to put the target in, and check for dupes */
609                 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
610                         if (targets[i] == newtarget) { /* duplicate */
611                                 pr_err("%s: ARP target %pI4 is already present\n",
612                                        bond->dev->name, &newtarget);
613                                 ret = -EINVAL;
614                                 goto out;
615                         }
616                         if (targets[i] == 0) {
617                                 pr_info("%s: adding ARP target %pI4.\n",
618                                         bond->dev->name, &newtarget);
619                                 done = 1;
620                                 targets[i] = newtarget;
621                         }
622                 }
623                 if (!done) {
624                         pr_err("%s: ARP target table is full!\n",
625                                bond->dev->name);
626                         ret = -EINVAL;
627                         goto out;
628                 }
629
630         } else if (buf[0] == '-')       {
631                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
632                         pr_err("%s: invalid ARP target %pI4 specified for removal\n",
633                                bond->dev->name, &newtarget);
634                         ret = -EINVAL;
635                         goto out;
636                 }
637
638                 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
639                         if (targets[i] == newtarget) {
640                                 int j;
641                                 pr_info("%s: removing ARP target %pI4.\n",
642                                         bond->dev->name, &newtarget);
643                                 for (j = i; (j < (BOND_MAX_ARP_TARGETS-1)) && targets[j+1]; j++)
644                                         targets[j] = targets[j+1];
645
646                                 targets[j] = 0;
647                                 done = 1;
648                         }
649                 }
650                 if (!done) {
651                         pr_info("%s: unable to remove nonexistent ARP target %pI4.\n",
652                                 bond->dev->name, &newtarget);
653                         ret = -EINVAL;
654                         goto out;
655                 }
656         } else {
657                 pr_err("no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
658                        bond->dev->name);
659                 ret = -EPERM;
660                 goto out;
661         }
662
663 out:
664         return ret;
665 }
666 static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
667
668 /*
669  * Show and set the up and down delays.  These must be multiples of the
670  * MII monitoring value, and are stored internally as the multiplier.
671  * Thus, we must translate to MS for the real world.
672  */
673 static ssize_t bonding_show_downdelay(struct device *d,
674                                       struct device_attribute *attr,
675                                       char *buf)
676 {
677         struct bonding *bond = to_bond(d);
678
679         return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
680 }
681
682 static ssize_t bonding_store_downdelay(struct device *d,
683                                        struct device_attribute *attr,
684                                        const char *buf, size_t count)
685 {
686         int new_value, ret = count;
687         struct bonding *bond = to_bond(d);
688
689         if (!(bond->params.miimon)) {
690                 pr_err("%s: Unable to set down delay as MII monitoring is disabled\n",
691                        bond->dev->name);
692                 ret = -EPERM;
693                 goto out;
694         }
695
696         if (sscanf(buf, "%d", &new_value) != 1) {
697                 pr_err("%s: no down delay value specified.\n", bond->dev->name);
698                 ret = -EINVAL;
699                 goto out;
700         }
701         if (new_value < 0) {
702                 pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n",
703                        bond->dev->name, new_value, 1, INT_MAX);
704                 ret = -EINVAL;
705                 goto out;
706         } else {
707                 if ((new_value % bond->params.miimon) != 0) {
708                         pr_warning("%s: Warning: down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
709                                    bond->dev->name, new_value,
710                                    bond->params.miimon,
711                                    (new_value / bond->params.miimon) *
712                                    bond->params.miimon);
713                 }
714                 bond->params.downdelay = new_value / bond->params.miimon;
715                 pr_info("%s: Setting down delay to %d.\n",
716                         bond->dev->name,
717                         bond->params.downdelay * bond->params.miimon);
718
719         }
720
721 out:
722         return ret;
723 }
724 static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR,
725                    bonding_show_downdelay, bonding_store_downdelay);
726
727 static ssize_t bonding_show_updelay(struct device *d,
728                                     struct device_attribute *attr,
729                                     char *buf)
730 {
731         struct bonding *bond = to_bond(d);
732
733         return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
734
735 }
736
737 static ssize_t bonding_store_updelay(struct device *d,
738                                      struct device_attribute *attr,
739                                      const char *buf, size_t count)
740 {
741         int new_value, ret = count;
742         struct bonding *bond = to_bond(d);
743
744         if (!(bond->params.miimon)) {
745                 pr_err("%s: Unable to set up delay as MII monitoring is disabled\n",
746                        bond->dev->name);
747                 ret = -EPERM;
748                 goto out;
749         }
750
751         if (sscanf(buf, "%d", &new_value) != 1) {
752                 pr_err("%s: no up delay value specified.\n",
753                        bond->dev->name);
754                 ret = -EINVAL;
755                 goto out;
756         }
757         if (new_value < 0) {
758                 pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n",
759                        bond->dev->name, new_value, 1, INT_MAX);
760                 ret = -EINVAL;
761                 goto out;
762         } else {
763                 if ((new_value % bond->params.miimon) != 0) {
764                         pr_warning("%s: Warning: up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
765                                    bond->dev->name, new_value,
766                                    bond->params.miimon,
767                                    (new_value / bond->params.miimon) *
768                                    bond->params.miimon);
769                 }
770                 bond->params.updelay = new_value / bond->params.miimon;
771                 pr_info("%s: Setting up delay to %d.\n",
772                         bond->dev->name,
773                         bond->params.updelay * bond->params.miimon);
774         }
775
776 out:
777         return ret;
778 }
779 static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR,
780                    bonding_show_updelay, bonding_store_updelay);
781
782 /*
783  * Show and set the LACP interval.  Interface must be down, and the mode
784  * must be set to 802.3ad mode.
785  */
786 static ssize_t bonding_show_lacp(struct device *d,
787                                  struct device_attribute *attr,
788                                  char *buf)
789 {
790         struct bonding *bond = to_bond(d);
791
792         return sprintf(buf, "%s %d\n",
793                 bond_lacp_tbl[bond->params.lacp_fast].modename,
794                 bond->params.lacp_fast);
795 }
796
797 static ssize_t bonding_store_lacp(struct device *d,
798                                   struct device_attribute *attr,
799                                   const char *buf, size_t count)
800 {
801         int new_value, ret = count;
802         struct bonding *bond = to_bond(d);
803
804         if (bond->dev->flags & IFF_UP) {
805                 pr_err("%s: Unable to update LACP rate because interface is up.\n",
806                        bond->dev->name);
807                 ret = -EPERM;
808                 goto out;
809         }
810
811         if (bond->params.mode != BOND_MODE_8023AD) {
812                 pr_err("%s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
813                        bond->dev->name);
814                 ret = -EPERM;
815                 goto out;
816         }
817
818         new_value = bond_parse_parm(buf, bond_lacp_tbl);
819
820         if ((new_value == 1) || (new_value == 0)) {
821                 bond->params.lacp_fast = new_value;
822                 pr_info("%s: Setting LACP rate to %s (%d).\n",
823                         bond->dev->name, bond_lacp_tbl[new_value].modename,
824                         new_value);
825         } else {
826                 pr_err("%s: Ignoring invalid LACP rate value %.*s.\n",
827                        bond->dev->name, (int)strlen(buf) - 1, buf);
828                 ret = -EINVAL;
829         }
830 out:
831         return ret;
832 }
833 static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR,
834                    bonding_show_lacp, bonding_store_lacp);
835
836 static ssize_t bonding_show_ad_select(struct device *d,
837                                       struct device_attribute *attr,
838                                       char *buf)
839 {
840         struct bonding *bond = to_bond(d);
841
842         return sprintf(buf, "%s %d\n",
843                 ad_select_tbl[bond->params.ad_select].modename,
844                 bond->params.ad_select);
845 }
846
847
848 static ssize_t bonding_store_ad_select(struct device *d,
849                                        struct device_attribute *attr,
850                                        const char *buf, size_t count)
851 {
852         int new_value, ret = count;
853         struct bonding *bond = to_bond(d);
854
855         if (bond->dev->flags & IFF_UP) {
856                 pr_err("%s: Unable to update ad_select because interface is up.\n",
857                        bond->dev->name);
858                 ret = -EPERM;
859                 goto out;
860         }
861
862         new_value = bond_parse_parm(buf, ad_select_tbl);
863
864         if (new_value != -1) {
865                 bond->params.ad_select = new_value;
866                 pr_info("%s: Setting ad_select to %s (%d).\n",
867                         bond->dev->name, ad_select_tbl[new_value].modename,
868                         new_value);
869         } else {
870                 pr_err("%s: Ignoring invalid ad_select value %.*s.\n",
871                        bond->dev->name, (int)strlen(buf) - 1, buf);
872                 ret = -EINVAL;
873         }
874 out:
875         return ret;
876 }
877 static DEVICE_ATTR(ad_select, S_IRUGO | S_IWUSR,
878                    bonding_show_ad_select, bonding_store_ad_select);
879
880 /*
881  * Show and set the number of grat ARP to send after a failover event.
882  */
883 static ssize_t bonding_show_n_grat_arp(struct device *d,
884                                    struct device_attribute *attr,
885                                    char *buf)
886 {
887         struct bonding *bond = to_bond(d);
888
889         return sprintf(buf, "%d\n", bond->params.num_grat_arp);
890 }
891
892 static ssize_t bonding_store_n_grat_arp(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 (sscanf(buf, "%d", &new_value) != 1) {
900                 pr_err("%s: no num_grat_arp value specified.\n",
901                        bond->dev->name);
902                 ret = -EINVAL;
903                 goto out;
904         }
905         if (new_value < 0 || new_value > 255) {
906                 pr_err("%s: Invalid num_grat_arp value %d not in range 0-255; rejected.\n",
907                        bond->dev->name, new_value);
908                 ret = -EINVAL;
909                 goto out;
910         } else {
911                 bond->params.num_grat_arp = new_value;
912         }
913 out:
914         return ret;
915 }
916 static DEVICE_ATTR(num_grat_arp, S_IRUGO | S_IWUSR,
917                    bonding_show_n_grat_arp, bonding_store_n_grat_arp);
918
919 /*
920  * Show and set the number of unsolicited NA's to send after a failover event.
921  */
922 static ssize_t bonding_show_n_unsol_na(struct device *d,
923                                        struct device_attribute *attr,
924                                        char *buf)
925 {
926         struct bonding *bond = to_bond(d);
927
928         return sprintf(buf, "%d\n", bond->params.num_unsol_na);
929 }
930
931 static ssize_t bonding_store_n_unsol_na(struct device *d,
932                                         struct device_attribute *attr,
933                                         const char *buf, size_t count)
934 {
935         int new_value, ret = count;
936         struct bonding *bond = to_bond(d);
937
938         if (sscanf(buf, "%d", &new_value) != 1) {
939                 pr_err("%s: no num_unsol_na value specified.\n",
940                        bond->dev->name);
941                 ret = -EINVAL;
942                 goto out;
943         }
944
945         if (new_value < 0 || new_value > 255) {
946                 pr_err("%s: Invalid num_unsol_na value %d not in range 0-255; rejected.\n",
947                        bond->dev->name, new_value);
948                 ret = -EINVAL;
949                 goto out;
950         } else
951                 bond->params.num_unsol_na = new_value;
952 out:
953         return ret;
954 }
955 static DEVICE_ATTR(num_unsol_na, S_IRUGO | S_IWUSR,
956                    bonding_show_n_unsol_na, bonding_store_n_unsol_na);
957
958 /*
959  * Show and set the MII monitor interval.  There are two tricky bits
960  * here.  First, if MII monitoring is activated, then we must disable
961  * ARP monitoring.  Second, if the timer isn't running, we must
962  * start it.
963  */
964 static ssize_t bonding_show_miimon(struct device *d,
965                                    struct device_attribute *attr,
966                                    char *buf)
967 {
968         struct bonding *bond = to_bond(d);
969
970         return sprintf(buf, "%d\n", bond->params.miimon);
971 }
972
973 static ssize_t bonding_store_miimon(struct device *d,
974                                     struct device_attribute *attr,
975                                     const char *buf, size_t count)
976 {
977         int new_value, ret = count;
978         struct bonding *bond = to_bond(d);
979
980         if (sscanf(buf, "%d", &new_value) != 1) {
981                 pr_err("%s: no miimon value specified.\n",
982                        bond->dev->name);
983                 ret = -EINVAL;
984                 goto out;
985         }
986         if (new_value < 0) {
987                 pr_err("%s: Invalid miimon value %d not in range %d-%d; rejected.\n",
988                        bond->dev->name, new_value, 1, INT_MAX);
989                 ret = -EINVAL;
990                 goto out;
991         } else {
992                 pr_info("%s: Setting MII monitoring interval to %d.\n",
993                         bond->dev->name, new_value);
994                 bond->params.miimon = new_value;
995                 if (bond->params.updelay)
996                         pr_info("%s: Note: Updating updelay (to %d) since it is a multiple of the miimon value.\n",
997                                 bond->dev->name,
998                                 bond->params.updelay * bond->params.miimon);
999                 if (bond->params.downdelay)
1000                         pr_info("%s: Note: Updating downdelay (to %d) since it is a multiple of the miimon value.\n",
1001                                 bond->dev->name,
1002                                 bond->params.downdelay * bond->params.miimon);
1003                 if (bond->params.arp_interval) {
1004                         pr_info("%s: MII monitoring cannot be used with ARP monitoring. Disabling ARP monitoring...\n",
1005                                 bond->dev->name);
1006                         bond->params.arp_interval = 0;
1007                         bond->dev->priv_flags &= ~IFF_MASTER_ARPMON;
1008                         if (bond->params.arp_validate) {
1009                                 bond_unregister_arp(bond);
1010                                 bond->params.arp_validate =
1011                                         BOND_ARP_VALIDATE_NONE;
1012                         }
1013                         if (delayed_work_pending(&bond->arp_work)) {
1014                                 cancel_delayed_work(&bond->arp_work);
1015                                 flush_workqueue(bond->wq);
1016                         }
1017                 }
1018
1019                 if (bond->dev->flags & IFF_UP) {
1020                         /* If the interface is up, we may need to fire off
1021                          * the MII timer. If the interface is down, the
1022                          * timer will get fired off when the open function
1023                          * is called.
1024                          */
1025                         if (!delayed_work_pending(&bond->mii_work)) {
1026                                 INIT_DELAYED_WORK(&bond->mii_work,
1027                                                   bond_mii_monitor);
1028                                 queue_delayed_work(bond->wq,
1029                                                    &bond->mii_work, 0);
1030                         }
1031                 }
1032         }
1033 out:
1034         return ret;
1035 }
1036 static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR,
1037                    bonding_show_miimon, bonding_store_miimon);
1038
1039 /*
1040  * Show and set the primary slave.  The store function is much
1041  * simpler than bonding_store_slaves function because it only needs to
1042  * handle one interface name.
1043  * The bond must be a mode that supports a primary for this be
1044  * set.
1045  */
1046 static ssize_t bonding_show_primary(struct device *d,
1047                                     struct device_attribute *attr,
1048                                     char *buf)
1049 {
1050         int count = 0;
1051         struct bonding *bond = to_bond(d);
1052
1053         if (bond->primary_slave)
1054                 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);
1055
1056         return count;
1057 }
1058
1059 static ssize_t bonding_store_primary(struct device *d,
1060                                      struct device_attribute *attr,
1061                                      const char *buf, size_t count)
1062 {
1063         int i;
1064         struct slave *slave;
1065         struct bonding *bond = to_bond(d);
1066
1067         if (!rtnl_trylock())
1068                 return restart_syscall();
1069         read_lock(&bond->lock);
1070         write_lock_bh(&bond->curr_slave_lock);
1071
1072         if (!USES_PRIMARY(bond->params.mode)) {
1073                 pr_info("%s: Unable to set primary slave; %s is in mode %d\n",
1074                         bond->dev->name, bond->dev->name, bond->params.mode);
1075         } else {
1076                 bond_for_each_slave(bond, slave, i) {
1077                         if (strnicmp
1078                             (slave->dev->name, buf,
1079                              strlen(slave->dev->name)) == 0) {
1080                                 pr_info("%s: Setting %s as primary slave.\n",
1081                                         bond->dev->name, slave->dev->name);
1082                                 bond->primary_slave = slave;
1083                                 strcpy(bond->params.primary, slave->dev->name);
1084                                 bond_select_active_slave(bond);
1085                                 goto out;
1086                         }
1087                 }
1088
1089                 /* if we got here, then we didn't match the name of any slave */
1090
1091                 if (strlen(buf) == 0 || buf[0] == '\n') {
1092                         pr_info("%s: Setting primary slave to None.\n",
1093                                 bond->dev->name);
1094                         bond->primary_slave = NULL;
1095                                 bond_select_active_slave(bond);
1096                 } else {
1097                         pr_info("%s: Unable to set %.*s as primary slave as it is not a slave.\n",
1098                                 bond->dev->name, (int)strlen(buf) - 1, buf);
1099                 }
1100         }
1101 out:
1102         write_unlock_bh(&bond->curr_slave_lock);
1103         read_unlock(&bond->lock);
1104         rtnl_unlock();
1105
1106         return count;
1107 }
1108 static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR,
1109                    bonding_show_primary, bonding_store_primary);
1110
1111 /*
1112  * Show and set the primary_reselect flag.
1113  */
1114 static ssize_t bonding_show_primary_reselect(struct device *d,
1115                                              struct device_attribute *attr,
1116                                              char *buf)
1117 {
1118         struct bonding *bond = to_bond(d);
1119
1120         return sprintf(buf, "%s %d\n",
1121                        pri_reselect_tbl[bond->params.primary_reselect].modename,
1122                        bond->params.primary_reselect);
1123 }
1124
1125 static ssize_t bonding_store_primary_reselect(struct device *d,
1126                                               struct device_attribute *attr,
1127                                               const char *buf, size_t count)
1128 {
1129         int new_value, ret = count;
1130         struct bonding *bond = to_bond(d);
1131
1132         if (!rtnl_trylock())
1133                 return restart_syscall();
1134
1135         new_value = bond_parse_parm(buf, pri_reselect_tbl);
1136         if (new_value < 0)  {
1137                 pr_err("%s: Ignoring invalid primary_reselect value %.*s.\n",
1138                        bond->dev->name,
1139                        (int) strlen(buf) - 1, buf);
1140                 ret = -EINVAL;
1141                 goto out;
1142         }
1143
1144         bond->params.primary_reselect = new_value;
1145         pr_info("%s: setting primary_reselect to %s (%d).\n",
1146                 bond->dev->name, pri_reselect_tbl[new_value].modename,
1147                 new_value);
1148
1149         read_lock(&bond->lock);
1150         write_lock_bh(&bond->curr_slave_lock);
1151         bond_select_active_slave(bond);
1152         write_unlock_bh(&bond->curr_slave_lock);
1153         read_unlock(&bond->lock);
1154 out:
1155         rtnl_unlock();
1156         return ret;
1157 }
1158 static DEVICE_ATTR(primary_reselect, S_IRUGO | S_IWUSR,
1159                    bonding_show_primary_reselect,
1160                    bonding_store_primary_reselect);
1161
1162 /*
1163  * Show and set the use_carrier flag.
1164  */
1165 static ssize_t bonding_show_carrier(struct device *d,
1166                                     struct device_attribute *attr,
1167                                     char *buf)
1168 {
1169         struct bonding *bond = to_bond(d);
1170
1171         return sprintf(buf, "%d\n", bond->params.use_carrier);
1172 }
1173
1174 static ssize_t bonding_store_carrier(struct device *d,
1175                                      struct device_attribute *attr,
1176                                      const char *buf, size_t count)
1177 {
1178         int new_value, ret = count;
1179         struct bonding *bond = to_bond(d);
1180
1181
1182         if (sscanf(buf, "%d", &new_value) != 1) {
1183                 pr_err("%s: no use_carrier value specified.\n",
1184                        bond->dev->name);
1185                 ret = -EINVAL;
1186                 goto out;
1187         }
1188         if ((new_value == 0) || (new_value == 1)) {
1189                 bond->params.use_carrier = new_value;
1190                 pr_info("%s: Setting use_carrier to %d.\n",
1191                         bond->dev->name, new_value);
1192         } else {
1193                 pr_info("%s: Ignoring invalid use_carrier value %d.\n",
1194                         bond->dev->name, new_value);
1195         }
1196 out:
1197         return count;
1198 }
1199 static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR,
1200                    bonding_show_carrier, bonding_store_carrier);
1201
1202
1203 /*
1204  * Show and set currently active_slave.
1205  */
1206 static ssize_t bonding_show_active_slave(struct device *d,
1207                                          struct device_attribute *attr,
1208                                          char *buf)
1209 {
1210         struct slave *curr;
1211         struct bonding *bond = to_bond(d);
1212         int count = 0;
1213
1214         read_lock(&bond->curr_slave_lock);
1215         curr = bond->curr_active_slave;
1216         read_unlock(&bond->curr_slave_lock);
1217
1218         if (USES_PRIMARY(bond->params.mode) && curr)
1219                 count = sprintf(buf, "%s\n", curr->dev->name);
1220         return count;
1221 }
1222
1223 static ssize_t bonding_store_active_slave(struct device *d,
1224                                           struct device_attribute *attr,
1225                                           const char *buf, size_t count)
1226 {
1227         int i;
1228         struct slave *slave;
1229         struct slave *old_active = NULL;
1230         struct slave *new_active = NULL;
1231         struct bonding *bond = to_bond(d);
1232
1233         if (!rtnl_trylock())
1234                 return restart_syscall();
1235         read_lock(&bond->lock);
1236         write_lock_bh(&bond->curr_slave_lock);
1237
1238         if (!USES_PRIMARY(bond->params.mode))
1239                 pr_info("%s: Unable to change active slave; %s is in mode %d\n",
1240                         bond->dev->name, bond->dev->name, bond->params.mode);
1241         else {
1242                 bond_for_each_slave(bond, slave, i) {
1243                         if (strnicmp
1244                             (slave->dev->name, buf,
1245                              strlen(slave->dev->name)) == 0) {
1246                                 old_active = bond->curr_active_slave;
1247                                 new_active = slave;
1248                                 if (new_active == old_active) {
1249                                         /* do nothing */
1250                                         pr_info("%s: %s is already the current active slave.\n",
1251                                                 bond->dev->name,
1252                                                 slave->dev->name);
1253                                         goto out;
1254                                 }
1255                                 else {
1256                                         if ((new_active) &&
1257                                             (old_active) &&
1258                                             (new_active->link == BOND_LINK_UP) &&
1259                                             IS_UP(new_active->dev)) {
1260                                                 pr_info("%s: Setting %s as active slave.\n",
1261                                                         bond->dev->name,
1262                                                         slave->dev->name);
1263                                                         bond_change_active_slave(bond, new_active);
1264                                         }
1265                                         else {
1266                                                 pr_info("%s: Could not set %s as active slave; either %s is down or the link is down.\n",
1267                                                         bond->dev->name,
1268                                                         slave->dev->name,
1269                                                         slave->dev->name);
1270                                         }
1271                                         goto out;
1272                                 }
1273                         }
1274                 }
1275
1276                 /* if we got here, then we didn't match the name of any slave */
1277
1278                 if (strlen(buf) == 0 || buf[0] == '\n') {
1279                         pr_info("%s: Setting active slave to None.\n",
1280                                 bond->dev->name);
1281                         bond->primary_slave = NULL;
1282                         bond_select_active_slave(bond);
1283                 } else {
1284                         pr_info("%s: Unable to set %.*s as active slave as it is not a slave.\n",
1285                                 bond->dev->name, (int)strlen(buf) - 1, buf);
1286                 }
1287         }
1288  out:
1289         write_unlock_bh(&bond->curr_slave_lock);
1290         read_unlock(&bond->lock);
1291         rtnl_unlock();
1292
1293         return count;
1294
1295 }
1296 static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR,
1297                    bonding_show_active_slave, bonding_store_active_slave);
1298
1299
1300 /*
1301  * Show link status of the bond interface.
1302  */
1303 static ssize_t bonding_show_mii_status(struct device *d,
1304                                        struct device_attribute *attr,
1305                                        char *buf)
1306 {
1307         struct slave *curr;
1308         struct bonding *bond = to_bond(d);
1309
1310         read_lock(&bond->curr_slave_lock);
1311         curr = bond->curr_active_slave;
1312         read_unlock(&bond->curr_slave_lock);
1313
1314         return sprintf(buf, "%s\n", curr ? "up" : "down");
1315 }
1316 static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1317
1318
1319 /*
1320  * Show current 802.3ad aggregator ID.
1321  */
1322 static ssize_t bonding_show_ad_aggregator(struct device *d,
1323                                           struct device_attribute *attr,
1324                                           char *buf)
1325 {
1326         int count = 0;
1327         struct bonding *bond = to_bond(d);
1328
1329         if (bond->params.mode == BOND_MODE_8023AD) {
1330                 struct ad_info ad_info;
1331                 count = sprintf(buf, "%d\n",
1332                                 (bond_3ad_get_active_agg_info(bond, &ad_info))
1333                                 ?  0 : ad_info.aggregator_id);
1334         }
1335
1336         return count;
1337 }
1338 static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1339
1340
1341 /*
1342  * Show number of active 802.3ad ports.
1343  */
1344 static ssize_t bonding_show_ad_num_ports(struct device *d,
1345                                          struct device_attribute *attr,
1346                                          char *buf)
1347 {
1348         int count = 0;
1349         struct bonding *bond = to_bond(d);
1350
1351         if (bond->params.mode == BOND_MODE_8023AD) {
1352                 struct ad_info ad_info;
1353                 count = sprintf(buf, "%d\n",
1354                                 (bond_3ad_get_active_agg_info(bond, &ad_info))
1355                                 ?  0 : ad_info.ports);
1356         }
1357
1358         return count;
1359 }
1360 static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1361
1362
1363 /*
1364  * Show current 802.3ad actor key.
1365  */
1366 static ssize_t bonding_show_ad_actor_key(struct device *d,
1367                                          struct device_attribute *attr,
1368                                          char *buf)
1369 {
1370         int count = 0;
1371         struct bonding *bond = to_bond(d);
1372
1373         if (bond->params.mode == BOND_MODE_8023AD) {
1374                 struct ad_info ad_info;
1375                 count = sprintf(buf, "%d\n",
1376                                 (bond_3ad_get_active_agg_info(bond, &ad_info))
1377                                 ?  0 : ad_info.actor_key);
1378         }
1379
1380         return count;
1381 }
1382 static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1383
1384
1385 /*
1386  * Show current 802.3ad partner key.
1387  */
1388 static ssize_t bonding_show_ad_partner_key(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                 count = sprintf(buf, "%d\n",
1398                                 (bond_3ad_get_active_agg_info(bond, &ad_info))
1399                                 ?  0 : ad_info.partner_key);
1400         }
1401
1402         return count;
1403 }
1404 static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1405
1406
1407 /*
1408  * Show current 802.3ad partner mac.
1409  */
1410 static ssize_t bonding_show_ad_partner_mac(struct device *d,
1411                                            struct device_attribute *attr,
1412                                            char *buf)
1413 {
1414         int count = 0;
1415         struct bonding *bond = to_bond(d);
1416
1417         if (bond->params.mode == BOND_MODE_8023AD) {
1418                 struct ad_info ad_info;
1419                 if (!bond_3ad_get_active_agg_info(bond, &ad_info))
1420                         count = sprintf(buf, "%pM\n", ad_info.partner_system);
1421         }
1422
1423         return count;
1424 }
1425 static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1426
1427 /*
1428  * Show the queue_ids of the slaves in the current bond.
1429  */
1430 static ssize_t bonding_show_queue_id(struct device *d,
1431                                      struct device_attribute *attr,
1432                                      char *buf)
1433 {
1434         struct slave *slave;
1435         int i, res = 0;
1436         struct bonding *bond = to_bond(d);
1437
1438         if (!rtnl_trylock())
1439                 return restart_syscall();
1440
1441         read_lock(&bond->lock);
1442         bond_for_each_slave(bond, slave, i) {
1443                 if (res > (PAGE_SIZE - IFNAMSIZ - 6)) {
1444                         /* not enough space for another interface_name:queue_id pair */
1445                         if ((PAGE_SIZE - res) > 10)
1446                                 res = PAGE_SIZE - 10;
1447                         res += sprintf(buf + res, "++more++ ");
1448                         break;
1449                 }
1450                 res += sprintf(buf + res, "%s:%d ",
1451                                slave->dev->name, slave->queue_id);
1452         }
1453         read_unlock(&bond->lock);
1454         if (res)
1455                 buf[res-1] = '\n'; /* eat the leftover space */
1456         rtnl_unlock();
1457         return res;
1458 }
1459
1460 /*
1461  * Set the queue_ids of the  slaves in the current bond.  The bond
1462  * interface must be enslaved for this to work.
1463  */
1464 static ssize_t bonding_store_queue_id(struct device *d,
1465                                       struct device_attribute *attr,
1466                                       const char *buffer, size_t count)
1467 {
1468         struct slave *slave, *update_slave;
1469         struct bonding *bond = to_bond(d);
1470         u16 qid;
1471         int i, ret = count;
1472         char *delim;
1473         struct net_device *sdev = NULL;
1474
1475         if (!rtnl_trylock())
1476                 return restart_syscall();
1477
1478         /* delim will point to queue id if successful */
1479         delim = strchr(buffer, ':');
1480         if (!delim)
1481                 goto err_no_cmd;
1482
1483         /*
1484          * Terminate string that points to device name and bump it
1485          * up one, so we can read the queue id there.
1486          */
1487         *delim = '\0';
1488         if (sscanf(++delim, "%hd\n", &qid) != 1)
1489                 goto err_no_cmd;
1490
1491         /* Check buffer length, valid ifname and queue id */
1492         if (strlen(buffer) > IFNAMSIZ ||
1493             !dev_valid_name(buffer) ||
1494             qid > bond->params.tx_queues)
1495                 goto err_no_cmd;
1496
1497         /* Get the pointer to that interface if it exists */
1498         sdev = __dev_get_by_name(dev_net(bond->dev), buffer);
1499         if (!sdev)
1500                 goto err_no_cmd;
1501
1502         read_lock(&bond->lock);
1503
1504         /* Search for thes slave and check for duplicate qids */
1505         update_slave = NULL;
1506         bond_for_each_slave(bond, slave, i) {
1507                 if (sdev == slave->dev)
1508                         /*
1509                          * We don't need to check the matching
1510                          * slave for dups, since we're overwriting it
1511                          */
1512                         update_slave = slave;
1513                 else if (qid && qid == slave->queue_id) {
1514                         goto err_no_cmd_unlock;
1515                 }
1516         }
1517
1518         if (!update_slave)
1519                 goto err_no_cmd_unlock;
1520
1521         /* Actually set the qids for the slave */
1522         update_slave->queue_id = qid;
1523
1524         read_unlock(&bond->lock);
1525 out:
1526         rtnl_unlock();
1527         return ret;
1528
1529 err_no_cmd_unlock:
1530         read_unlock(&bond->lock);
1531 err_no_cmd:
1532         pr_info("invalid input for queue_id set for %s.\n",
1533                 bond->dev->name);
1534         ret = -EPERM;
1535         goto out;
1536 }
1537
1538 static DEVICE_ATTR(queue_id, S_IRUGO | S_IWUSR, bonding_show_queue_id,
1539                    bonding_store_queue_id);
1540
1541
1542 /*
1543  * Show and set the all_slaves_active flag.
1544  */
1545 static ssize_t bonding_show_slaves_active(struct device *d,
1546                                           struct device_attribute *attr,
1547                                           char *buf)
1548 {
1549         struct bonding *bond = to_bond(d);
1550
1551         return sprintf(buf, "%d\n", bond->params.all_slaves_active);
1552 }
1553
1554 static ssize_t bonding_store_slaves_active(struct device *d,
1555                                            struct device_attribute *attr,
1556                                            const char *buf, size_t count)
1557 {
1558         int i, new_value, ret = count;
1559         struct bonding *bond = to_bond(d);
1560         struct slave *slave;
1561
1562         if (sscanf(buf, "%d", &new_value) != 1) {
1563                 pr_err("%s: no all_slaves_active value specified.\n",
1564                        bond->dev->name);
1565                 ret = -EINVAL;
1566                 goto out;
1567         }
1568
1569         if (new_value == bond->params.all_slaves_active)
1570                 goto out;
1571
1572         if ((new_value == 0) || (new_value == 1)) {
1573                 bond->params.all_slaves_active = new_value;
1574         } else {
1575                 pr_info("%s: Ignoring invalid all_slaves_active value %d.\n",
1576                         bond->dev->name, new_value);
1577                 ret = -EINVAL;
1578                 goto out;
1579         }
1580
1581         bond_for_each_slave(bond, slave, i) {
1582                 if (slave->state == BOND_STATE_BACKUP) {
1583                         if (new_value)
1584                                 slave->dev->priv_flags &= ~IFF_SLAVE_INACTIVE;
1585                         else
1586                                 slave->dev->priv_flags |= IFF_SLAVE_INACTIVE;
1587                 }
1588         }
1589 out:
1590         return count;
1591 }
1592 static DEVICE_ATTR(all_slaves_active, S_IRUGO | S_IWUSR,
1593                    bonding_show_slaves_active, bonding_store_slaves_active);
1594
1595 /*
1596  * Show and set the number of IGMP membership reports to send on link failure
1597  */
1598 static ssize_t bonding_show_resend_igmp(struct device *d,
1599                                          struct device_attribute *attr,
1600                                          char *buf)
1601 {
1602         struct bonding *bond = to_bond(d);
1603
1604         return sprintf(buf, "%d\n", bond->params.resend_igmp);
1605 }
1606
1607 static ssize_t bonding_store_resend_igmp(struct device *d,
1608                                           struct device_attribute *attr,
1609                                           const char *buf, size_t count)
1610 {
1611         int new_value, ret = count;
1612         struct bonding *bond = to_bond(d);
1613
1614         if (sscanf(buf, "%d", &new_value) != 1) {
1615                 pr_err("%s: no resend_igmp value specified.\n",
1616                        bond->dev->name);
1617                 ret = -EINVAL;
1618                 goto out;
1619         }
1620
1621         if (new_value < 0) {
1622                 pr_err("%s: Invalid resend_igmp value %d not in range 0-255; rejected.\n",
1623                        bond->dev->name, new_value);
1624                 ret = -EINVAL;
1625                 goto out;
1626         }
1627
1628         pr_info("%s: Setting resend_igmp to %d.\n",
1629                 bond->dev->name, new_value);
1630         bond->params.resend_igmp = new_value;
1631 out:
1632         return ret;
1633 }
1634
1635 static DEVICE_ATTR(resend_igmp, S_IRUGO | S_IWUSR,
1636                    bonding_show_resend_igmp, bonding_store_resend_igmp);
1637
1638 static struct attribute *per_bond_attrs[] = {
1639         &dev_attr_slaves.attr,
1640         &dev_attr_mode.attr,
1641         &dev_attr_fail_over_mac.attr,
1642         &dev_attr_arp_validate.attr,
1643         &dev_attr_arp_interval.attr,
1644         &dev_attr_arp_ip_target.attr,
1645         &dev_attr_downdelay.attr,
1646         &dev_attr_updelay.attr,
1647         &dev_attr_lacp_rate.attr,
1648         &dev_attr_ad_select.attr,
1649         &dev_attr_xmit_hash_policy.attr,
1650         &dev_attr_num_grat_arp.attr,
1651         &dev_attr_num_unsol_na.attr,
1652         &dev_attr_miimon.attr,
1653         &dev_attr_primary.attr,
1654         &dev_attr_primary_reselect.attr,
1655         &dev_attr_use_carrier.attr,
1656         &dev_attr_active_slave.attr,
1657         &dev_attr_mii_status.attr,
1658         &dev_attr_ad_aggregator.attr,
1659         &dev_attr_ad_num_ports.attr,
1660         &dev_attr_ad_actor_key.attr,
1661         &dev_attr_ad_partner_key.attr,
1662         &dev_attr_ad_partner_mac.attr,
1663         &dev_attr_queue_id.attr,
1664         &dev_attr_all_slaves_active.attr,
1665         &dev_attr_resend_igmp.attr,
1666         NULL,
1667 };
1668
1669 static struct attribute_group bonding_group = {
1670         .name = "bonding",
1671         .attrs = per_bond_attrs,
1672 };
1673
1674 /*
1675  * Initialize sysfs.  This sets up the bonding_masters file in
1676  * /sys/class/net.
1677  */
1678 int bond_create_sysfs(void)
1679 {
1680         int ret;
1681
1682         ret = netdev_class_create_file(&class_attr_bonding_masters);
1683         /*
1684          * Permit multiple loads of the module by ignoring failures to
1685          * create the bonding_masters sysfs file.  Bonding devices
1686          * created by second or subsequent loads of the module will
1687          * not be listed in, or controllable by, bonding_masters, but
1688          * will have the usual "bonding" sysfs directory.
1689          *
1690          * This is done to preserve backwards compatibility for
1691          * initscripts/sysconfig, which load bonding multiple times to
1692          * configure multiple bonding devices.
1693          */
1694         if (ret == -EEXIST) {
1695                 /* Is someone being kinky and naming a device bonding_master? */
1696                 if (__dev_get_by_name(&init_net,
1697                                       class_attr_bonding_masters.attr.name))
1698                         pr_err("network device named %s already exists in sysfs",
1699                                class_attr_bonding_masters.attr.name);
1700                 ret = 0;
1701         }
1702
1703         return ret;
1704
1705 }
1706
1707 /*
1708  * Remove /sys/class/net/bonding_masters.
1709  */
1710 void bond_destroy_sysfs(void)
1711 {
1712         netdev_class_remove_file(&class_attr_bonding_masters);
1713 }
1714
1715 /*
1716  * Initialize sysfs for each bond.  This sets up and registers
1717  * the 'bondctl' directory for each individual bond under /sys/class/net.
1718  */
1719 void bond_prepare_sysfs_group(struct bonding *bond)
1720 {
1721         bond->dev->sysfs_groups[0] = &bonding_group;
1722 }
1723