bonding: get rid of IFF_SLAVE_INACTIVE netdev->priv_flag
[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                         if (rv == -EEXIST)
122                                 pr_info("%s already exists.\n", ifname);
123                         else
124                                 pr_info("%s creation failed.\n", ifname);
125                         res = rv;
126                 }
127         } else if (command[0] == '-') {
128                 struct net_device *bond_dev;
129
130                 rtnl_lock();
131                 bond_dev = bond_get_by_name(net, ifname);
132                 if (bond_dev) {
133                         pr_info("%s is being deleted...\n", ifname);
134                         unregister_netdevice(bond_dev);
135                 } else {
136                         pr_err("unable to delete non-existent %s\n", ifname);
137                         res = -ENODEV;
138                 }
139                 rtnl_unlock();
140         } else
141                 goto err_no_cmd;
142
143         /* Always return either count or an error.  If you return 0, you'll
144          * get called forever, which is bad.
145          */
146         return res;
147
148 err_no_cmd:
149         pr_err("no command found in bonding_masters. Use +ifname or -ifname.\n");
150         return -EPERM;
151 }
152
153 /* class attribute for bond_masters file.  This ends up in /sys/class/net */
154 static CLASS_ATTR(bonding_masters,  S_IWUSR | S_IRUGO,
155                   bonding_show_bonds, bonding_store_bonds);
156
157 int bond_create_slave_symlinks(struct net_device *master,
158                                struct net_device *slave)
159 {
160         char linkname[IFNAMSIZ+7];
161         int ret = 0;
162
163         /* first, create a link from the slave back to the master */
164         ret = sysfs_create_link(&(slave->dev.kobj), &(master->dev.kobj),
165                                 "master");
166         if (ret)
167                 return ret;
168         /* next, create a link from the master to the slave */
169         sprintf(linkname, "slave_%s", slave->name);
170         ret = sysfs_create_link(&(master->dev.kobj), &(slave->dev.kobj),
171                                 linkname);
172         return ret;
173
174 }
175
176 void bond_destroy_slave_symlinks(struct net_device *master,
177                                  struct net_device *slave)
178 {
179         char linkname[IFNAMSIZ+7];
180
181         sysfs_remove_link(&(slave->dev.kobj), "master");
182         sprintf(linkname, "slave_%s", slave->name);
183         sysfs_remove_link(&(master->dev.kobj), linkname);
184 }
185
186
187 /*
188  * Show the slaves in the current bond.
189  */
190 static ssize_t bonding_show_slaves(struct device *d,
191                                    struct device_attribute *attr, char *buf)
192 {
193         struct slave *slave;
194         int i, res = 0;
195         struct bonding *bond = to_bond(d);
196
197         read_lock(&bond->lock);
198         bond_for_each_slave(bond, slave, i) {
199                 if (res > (PAGE_SIZE - IFNAMSIZ)) {
200                         /* not enough space for another interface name */
201                         if ((PAGE_SIZE - res) > 10)
202                                 res = PAGE_SIZE - 10;
203                         res += sprintf(buf + res, "++more++ ");
204                         break;
205                 }
206                 res += sprintf(buf + res, "%s ", slave->dev->name);
207         }
208         read_unlock(&bond->lock);
209         if (res)
210                 buf[res-1] = '\n'; /* eat the leftover space */
211         return res;
212 }
213
214 /*
215  * Set the slaves in the current bond.  The bond interface must be
216  * up for this to succeed.
217  * This is supposed to be only thin wrapper for bond_enslave and bond_release.
218  * All hard work should be done there.
219  */
220 static ssize_t bonding_store_slaves(struct device *d,
221                                     struct device_attribute *attr,
222                                     const char *buffer, size_t count)
223 {
224         char command[IFNAMSIZ + 1] = { 0, };
225         char *ifname;
226         int res, ret = count;
227         struct net_device *dev;
228         struct bonding *bond = to_bond(d);
229
230         /* Quick sanity check -- is the bond interface up? */
231         if (!(bond->dev->flags & IFF_UP)) {
232                 pr_warning("%s: doing slave updates when interface is down.\n",
233                            bond->dev->name);
234         }
235
236         if (!rtnl_trylock())
237                 return restart_syscall();
238
239         sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
240         ifname = command + 1;
241         if ((strlen(command) <= 1) ||
242             !dev_valid_name(ifname))
243                 goto err_no_cmd;
244
245         dev = __dev_get_by_name(dev_net(bond->dev), ifname);
246         if (!dev) {
247                 pr_info("%s: Interface %s does not exist!\n",
248                         bond->dev->name, ifname);
249                 ret = -ENODEV;
250                 goto out;
251         }
252
253         switch (command[0]) {
254         case '+':
255                 pr_info("%s: Adding slave %s.\n", bond->dev->name, dev->name);
256                 res = bond_enslave(bond->dev, dev);
257                 break;
258
259         case '-':
260                 pr_info("%s: Removing slave %s.\n", bond->dev->name, dev->name);
261                 res = bond_release(bond->dev, dev);
262                 break;
263
264         default:
265                 goto err_no_cmd;
266         }
267
268         if (res)
269                 ret = res;
270         goto out;
271
272 err_no_cmd:
273         pr_err("no command found in slaves file for bond %s. Use +ifname or -ifname.\n",
274                bond->dev->name);
275         ret = -EPERM;
276
277 out:
278         rtnl_unlock();
279         return ret;
280 }
281
282 static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves,
283                    bonding_store_slaves);
284
285 /*
286  * Show and set the bonding mode.  The bond interface must be down to
287  * change the mode.
288  */
289 static ssize_t bonding_show_mode(struct device *d,
290                                  struct device_attribute *attr, char *buf)
291 {
292         struct bonding *bond = to_bond(d);
293
294         return sprintf(buf, "%s %d\n",
295                         bond_mode_tbl[bond->params.mode].modename,
296                         bond->params.mode);
297 }
298
299 static ssize_t bonding_store_mode(struct device *d,
300                                   struct device_attribute *attr,
301                                   const char *buf, size_t count)
302 {
303         int new_value, ret = count;
304         struct bonding *bond = to_bond(d);
305
306         if (bond->dev->flags & IFF_UP) {
307                 pr_err("unable to update mode of %s because interface is up.\n",
308                        bond->dev->name);
309                 ret = -EPERM;
310                 goto out;
311         }
312
313         new_value = bond_parse_parm(buf, bond_mode_tbl);
314         if (new_value < 0)  {
315                 pr_err("%s: Ignoring invalid mode value %.*s.\n",
316                        bond->dev->name, (int)strlen(buf) - 1, buf);
317                 ret = -EINVAL;
318                 goto out;
319         }
320         if ((new_value == BOND_MODE_ALB ||
321              new_value == BOND_MODE_TLB) &&
322             bond->params.arp_interval) {
323                 pr_err("%s: %s mode is incompatible with arp monitoring.\n",
324                        bond->dev->name, bond_mode_tbl[new_value].modename);
325                 ret = -EINVAL;
326                 goto out;
327         }
328
329         bond->params.mode = new_value;
330         bond_set_mode_ops(bond, bond->params.mode);
331         pr_info("%s: setting mode to %s (%d).\n",
332                 bond->dev->name, bond_mode_tbl[new_value].modename,
333                 new_value);
334 out:
335         return ret;
336 }
337 static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,
338                    bonding_show_mode, bonding_store_mode);
339
340 /*
341  * Show and set the bonding transmit hash method.
342  * The bond interface must be down to change the xmit hash policy.
343  */
344 static ssize_t bonding_show_xmit_hash(struct device *d,
345                                       struct device_attribute *attr,
346                                       char *buf)
347 {
348         struct bonding *bond = to_bond(d);
349
350         return sprintf(buf, "%s %d\n",
351                        xmit_hashtype_tbl[bond->params.xmit_policy].modename,
352                        bond->params.xmit_policy);
353 }
354
355 static ssize_t bonding_store_xmit_hash(struct device *d,
356                                        struct device_attribute *attr,
357                                        const char *buf, size_t count)
358 {
359         int new_value, ret = count;
360         struct bonding *bond = to_bond(d);
361
362         if (bond->dev->flags & IFF_UP) {
363                 pr_err("%s: Interface is up. Unable to update xmit policy.\n",
364                        bond->dev->name);
365                 ret = -EPERM;
366                 goto out;
367         }
368
369         new_value = bond_parse_parm(buf, xmit_hashtype_tbl);
370         if (new_value < 0)  {
371                 pr_err("%s: Ignoring invalid xmit hash policy value %.*s.\n",
372                        bond->dev->name,
373                        (int)strlen(buf) - 1, buf);
374                 ret = -EINVAL;
375                 goto out;
376         } else {
377                 bond->params.xmit_policy = new_value;
378                 bond_set_mode_ops(bond, bond->params.mode);
379                 pr_info("%s: setting xmit hash policy to %s (%d).\n",
380                         bond->dev->name,
381                         xmit_hashtype_tbl[new_value].modename, new_value);
382         }
383 out:
384         return ret;
385 }
386 static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR,
387                    bonding_show_xmit_hash, bonding_store_xmit_hash);
388
389 /*
390  * Show and set arp_validate.
391  */
392 static ssize_t bonding_show_arp_validate(struct device *d,
393                                          struct device_attribute *attr,
394                                          char *buf)
395 {
396         struct bonding *bond = to_bond(d);
397
398         return sprintf(buf, "%s %d\n",
399                        arp_validate_tbl[bond->params.arp_validate].modename,
400                        bond->params.arp_validate);
401 }
402
403 static ssize_t bonding_store_arp_validate(struct device *d,
404                                           struct device_attribute *attr,
405                                           const char *buf, size_t count)
406 {
407         int new_value;
408         struct bonding *bond = to_bond(d);
409
410         new_value = bond_parse_parm(buf, arp_validate_tbl);
411         if (new_value < 0) {
412                 pr_err("%s: Ignoring invalid arp_validate value %s\n",
413                        bond->dev->name, buf);
414                 return -EINVAL;
415         }
416         if (new_value && (bond->params.mode != BOND_MODE_ACTIVEBACKUP)) {
417                 pr_err("%s: arp_validate only supported in active-backup mode.\n",
418                        bond->dev->name);
419                 return -EINVAL;
420         }
421         pr_info("%s: setting arp_validate to %s (%d).\n",
422                 bond->dev->name, arp_validate_tbl[new_value].modename,
423                 new_value);
424
425         if (!bond->params.arp_validate && new_value)
426                 bond_register_arp(bond);
427         else if (bond->params.arp_validate && !new_value)
428                 bond_unregister_arp(bond);
429
430         bond->params.arp_validate = new_value;
431
432         return count;
433 }
434
435 static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate,
436                    bonding_store_arp_validate);
437
438 /*
439  * Show and store fail_over_mac.  User only allowed to change the
440  * value when there are no slaves.
441  */
442 static ssize_t bonding_show_fail_over_mac(struct device *d,
443                                           struct device_attribute *attr,
444                                           char *buf)
445 {
446         struct bonding *bond = to_bond(d);
447
448         return sprintf(buf, "%s %d\n",
449                        fail_over_mac_tbl[bond->params.fail_over_mac].modename,
450                        bond->params.fail_over_mac);
451 }
452
453 static ssize_t bonding_store_fail_over_mac(struct device *d,
454                                            struct device_attribute *attr,
455                                            const char *buf, size_t count)
456 {
457         int new_value;
458         struct bonding *bond = to_bond(d);
459
460         if (bond->slave_cnt != 0) {
461                 pr_err("%s: Can't alter fail_over_mac with slaves in bond.\n",
462                        bond->dev->name);
463                 return -EPERM;
464         }
465
466         new_value = bond_parse_parm(buf, fail_over_mac_tbl);
467         if (new_value < 0) {
468                 pr_err("%s: Ignoring invalid fail_over_mac value %s.\n",
469                        bond->dev->name, buf);
470                 return -EINVAL;
471         }
472
473         bond->params.fail_over_mac = new_value;
474         pr_info("%s: Setting fail_over_mac to %s (%d).\n",
475                 bond->dev->name, fail_over_mac_tbl[new_value].modename,
476                 new_value);
477
478         return count;
479 }
480
481 static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR,
482                    bonding_show_fail_over_mac, bonding_store_fail_over_mac);
483
484 /*
485  * Show and set the arp timer interval.  There are two tricky bits
486  * here.  First, if ARP monitoring is activated, then we must disable
487  * MII monitoring.  Second, if the ARP timer isn't running, we must
488  * start it.
489  */
490 static ssize_t bonding_show_arp_interval(struct device *d,
491                                          struct device_attribute *attr,
492                                          char *buf)
493 {
494         struct bonding *bond = to_bond(d);
495
496         return sprintf(buf, "%d\n", bond->params.arp_interval);
497 }
498
499 static ssize_t bonding_store_arp_interval(struct device *d,
500                                           struct device_attribute *attr,
501                                           const char *buf, size_t count)
502 {
503         int new_value, ret = count;
504         struct bonding *bond = to_bond(d);
505
506         if (sscanf(buf, "%d", &new_value) != 1) {
507                 pr_err("%s: no arp_interval value specified.\n",
508                        bond->dev->name);
509                 ret = -EINVAL;
510                 goto out;
511         }
512         if (new_value < 0) {
513                 pr_err("%s: Invalid arp_interval value %d not in range 1-%d; rejected.\n",
514                        bond->dev->name, new_value, INT_MAX);
515                 ret = -EINVAL;
516                 goto out;
517         }
518         if (bond->params.mode == BOND_MODE_ALB ||
519             bond->params.mode == BOND_MODE_TLB) {
520                 pr_info("%s: ARP monitoring cannot be used with ALB/TLB. Only MII monitoring is supported on %s.\n",
521                         bond->dev->name, bond->dev->name);
522                 ret = -EINVAL;
523                 goto out;
524         }
525         pr_info("%s: Setting ARP monitoring interval to %d.\n",
526                 bond->dev->name, new_value);
527         bond->params.arp_interval = new_value;
528         if (bond->params.miimon) {
529                 pr_info("%s: ARP monitoring cannot be used with MII monitoring. %s Disabling MII monitoring.\n",
530                         bond->dev->name, bond->dev->name);
531                 bond->params.miimon = 0;
532                 if (delayed_work_pending(&bond->mii_work)) {
533                         cancel_delayed_work(&bond->mii_work);
534                         flush_workqueue(bond->wq);
535                 }
536         }
537         if (!bond->params.arp_targets[0]) {
538                 pr_info("%s: ARP monitoring has been set up, but no ARP targets have been specified.\n",
539                         bond->dev->name);
540         }
541         if (bond->dev->flags & IFF_UP) {
542                 /* If the interface is up, we may need to fire off
543                  * the ARP timer.  If the interface is down, the
544                  * timer will get fired off when the open function
545                  * is called.
546                  */
547                 if (!delayed_work_pending(&bond->arp_work)) {
548                         if (bond->params.mode == BOND_MODE_ACTIVEBACKUP)
549                                 INIT_DELAYED_WORK(&bond->arp_work,
550                                                   bond_activebackup_arp_mon);
551                         else
552                                 INIT_DELAYED_WORK(&bond->arp_work,
553                                                   bond_loadbalance_arp_mon);
554
555                         queue_delayed_work(bond->wq, &bond->arp_work, 0);
556                 }
557         }
558
559 out:
560         return ret;
561 }
562 static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR,
563                    bonding_show_arp_interval, bonding_store_arp_interval);
564
565 /*
566  * Show and set the arp targets.
567  */
568 static ssize_t bonding_show_arp_targets(struct device *d,
569                                         struct device_attribute *attr,
570                                         char *buf)
571 {
572         int i, res = 0;
573         struct bonding *bond = to_bond(d);
574
575         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
576                 if (bond->params.arp_targets[i])
577                         res += sprintf(buf + res, "%pI4 ",
578                                        &bond->params.arp_targets[i]);
579         }
580         if (res)
581                 buf[res-1] = '\n'; /* eat the leftover space */
582         return res;
583 }
584
585 static ssize_t bonding_store_arp_targets(struct device *d,
586                                          struct device_attribute *attr,
587                                          const char *buf, size_t count)
588 {
589         __be32 newtarget;
590         int i = 0, done = 0, ret = count;
591         struct bonding *bond = to_bond(d);
592         __be32 *targets;
593
594         targets = bond->params.arp_targets;
595         newtarget = in_aton(buf + 1);
596         /* look for adds */
597         if (buf[0] == '+') {
598                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
599                         pr_err("%s: invalid ARP target %pI4 specified for addition\n",
600                                bond->dev->name, &newtarget);
601                         ret = -EINVAL;
602                         goto out;
603                 }
604                 /* look for an empty slot to put the target in, and check for dupes */
605                 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
606                         if (targets[i] == newtarget) { /* duplicate */
607                                 pr_err("%s: ARP target %pI4 is already present\n",
608                                        bond->dev->name, &newtarget);
609                                 ret = -EINVAL;
610                                 goto out;
611                         }
612                         if (targets[i] == 0) {
613                                 pr_info("%s: adding ARP target %pI4.\n",
614                                         bond->dev->name, &newtarget);
615                                 done = 1;
616                                 targets[i] = newtarget;
617                         }
618                 }
619                 if (!done) {
620                         pr_err("%s: ARP target table is full!\n",
621                                bond->dev->name);
622                         ret = -EINVAL;
623                         goto out;
624                 }
625
626         } else if (buf[0] == '-')       {
627                 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
628                         pr_err("%s: invalid ARP target %pI4 specified for removal\n",
629                                bond->dev->name, &newtarget);
630                         ret = -EINVAL;
631                         goto out;
632                 }
633
634                 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
635                         if (targets[i] == newtarget) {
636                                 int j;
637                                 pr_info("%s: removing ARP target %pI4.\n",
638                                         bond->dev->name, &newtarget);
639                                 for (j = i; (j < (BOND_MAX_ARP_TARGETS-1)) && targets[j+1]; j++)
640                                         targets[j] = targets[j+1];
641
642                                 targets[j] = 0;
643                                 done = 1;
644                         }
645                 }
646                 if (!done) {
647                         pr_info("%s: unable to remove nonexistent ARP target %pI4.\n",
648                                 bond->dev->name, &newtarget);
649                         ret = -EINVAL;
650                         goto out;
651                 }
652         } else {
653                 pr_err("no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
654                        bond->dev->name);
655                 ret = -EPERM;
656                 goto out;
657         }
658
659 out:
660         return ret;
661 }
662 static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
663
664 /*
665  * Show and set the up and down delays.  These must be multiples of the
666  * MII monitoring value, and are stored internally as the multiplier.
667  * Thus, we must translate to MS for the real world.
668  */
669 static ssize_t bonding_show_downdelay(struct device *d,
670                                       struct device_attribute *attr,
671                                       char *buf)
672 {
673         struct bonding *bond = to_bond(d);
674
675         return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
676 }
677
678 static ssize_t bonding_store_downdelay(struct device *d,
679                                        struct device_attribute *attr,
680                                        const char *buf, size_t count)
681 {
682         int new_value, ret = count;
683         struct bonding *bond = to_bond(d);
684
685         if (!(bond->params.miimon)) {
686                 pr_err("%s: Unable to set down delay as MII monitoring is disabled\n",
687                        bond->dev->name);
688                 ret = -EPERM;
689                 goto out;
690         }
691
692         if (sscanf(buf, "%d", &new_value) != 1) {
693                 pr_err("%s: no down delay value specified.\n", bond->dev->name);
694                 ret = -EINVAL;
695                 goto out;
696         }
697         if (new_value < 0) {
698                 pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n",
699                        bond->dev->name, new_value, 1, INT_MAX);
700                 ret = -EINVAL;
701                 goto out;
702         } else {
703                 if ((new_value % bond->params.miimon) != 0) {
704                         pr_warning("%s: Warning: down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
705                                    bond->dev->name, new_value,
706                                    bond->params.miimon,
707                                    (new_value / bond->params.miimon) *
708                                    bond->params.miimon);
709                 }
710                 bond->params.downdelay = new_value / bond->params.miimon;
711                 pr_info("%s: Setting down delay to %d.\n",
712                         bond->dev->name,
713                         bond->params.downdelay * bond->params.miimon);
714
715         }
716
717 out:
718         return ret;
719 }
720 static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR,
721                    bonding_show_downdelay, bonding_store_downdelay);
722
723 static ssize_t bonding_show_updelay(struct device *d,
724                                     struct device_attribute *attr,
725                                     char *buf)
726 {
727         struct bonding *bond = to_bond(d);
728
729         return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
730
731 }
732
733 static ssize_t bonding_store_updelay(struct device *d,
734                                      struct device_attribute *attr,
735                                      const char *buf, size_t count)
736 {
737         int new_value, ret = count;
738         struct bonding *bond = to_bond(d);
739
740         if (!(bond->params.miimon)) {
741                 pr_err("%s: Unable to set up delay as MII monitoring is disabled\n",
742                        bond->dev->name);
743                 ret = -EPERM;
744                 goto out;
745         }
746
747         if (sscanf(buf, "%d", &new_value) != 1) {
748                 pr_err("%s: no up delay value specified.\n",
749                        bond->dev->name);
750                 ret = -EINVAL;
751                 goto out;
752         }
753         if (new_value < 0) {
754                 pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n",
755                        bond->dev->name, new_value, 1, INT_MAX);
756                 ret = -EINVAL;
757                 goto out;
758         } else {
759                 if ((new_value % bond->params.miimon) != 0) {
760                         pr_warning("%s: Warning: up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
761                                    bond->dev->name, new_value,
762                                    bond->params.miimon,
763                                    (new_value / bond->params.miimon) *
764                                    bond->params.miimon);
765                 }
766                 bond->params.updelay = new_value / bond->params.miimon;
767                 pr_info("%s: Setting up delay to %d.\n",
768                         bond->dev->name,
769                         bond->params.updelay * bond->params.miimon);
770         }
771
772 out:
773         return ret;
774 }
775 static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR,
776                    bonding_show_updelay, bonding_store_updelay);
777
778 /*
779  * Show and set the LACP interval.  Interface must be down, and the mode
780  * must be set to 802.3ad mode.
781  */
782 static ssize_t bonding_show_lacp(struct device *d,
783                                  struct device_attribute *attr,
784                                  char *buf)
785 {
786         struct bonding *bond = to_bond(d);
787
788         return sprintf(buf, "%s %d\n",
789                 bond_lacp_tbl[bond->params.lacp_fast].modename,
790                 bond->params.lacp_fast);
791 }
792
793 static ssize_t bonding_store_lacp(struct device *d,
794                                   struct device_attribute *attr,
795                                   const char *buf, size_t count)
796 {
797         int new_value, ret = count;
798         struct bonding *bond = to_bond(d);
799
800         if (bond->dev->flags & IFF_UP) {
801                 pr_err("%s: Unable to update LACP rate because interface is up.\n",
802                        bond->dev->name);
803                 ret = -EPERM;
804                 goto out;
805         }
806
807         if (bond->params.mode != BOND_MODE_8023AD) {
808                 pr_err("%s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
809                        bond->dev->name);
810                 ret = -EPERM;
811                 goto out;
812         }
813
814         new_value = bond_parse_parm(buf, bond_lacp_tbl);
815
816         if ((new_value == 1) || (new_value == 0)) {
817                 bond->params.lacp_fast = new_value;
818                 pr_info("%s: Setting LACP rate to %s (%d).\n",
819                         bond->dev->name, bond_lacp_tbl[new_value].modename,
820                         new_value);
821         } else {
822                 pr_err("%s: Ignoring invalid LACP rate value %.*s.\n",
823                        bond->dev->name, (int)strlen(buf) - 1, buf);
824                 ret = -EINVAL;
825         }
826 out:
827         return ret;
828 }
829 static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR,
830                    bonding_show_lacp, bonding_store_lacp);
831
832 static ssize_t bonding_show_ad_select(struct device *d,
833                                       struct device_attribute *attr,
834                                       char *buf)
835 {
836         struct bonding *bond = to_bond(d);
837
838         return sprintf(buf, "%s %d\n",
839                 ad_select_tbl[bond->params.ad_select].modename,
840                 bond->params.ad_select);
841 }
842
843
844 static ssize_t bonding_store_ad_select(struct device *d,
845                                        struct device_attribute *attr,
846                                        const char *buf, size_t count)
847 {
848         int new_value, ret = count;
849         struct bonding *bond = to_bond(d);
850
851         if (bond->dev->flags & IFF_UP) {
852                 pr_err("%s: Unable to update ad_select because interface is up.\n",
853                        bond->dev->name);
854                 ret = -EPERM;
855                 goto out;
856         }
857
858         new_value = bond_parse_parm(buf, ad_select_tbl);
859
860         if (new_value != -1) {
861                 bond->params.ad_select = new_value;
862                 pr_info("%s: Setting ad_select to %s (%d).\n",
863                         bond->dev->name, ad_select_tbl[new_value].modename,
864                         new_value);
865         } else {
866                 pr_err("%s: Ignoring invalid ad_select value %.*s.\n",
867                        bond->dev->name, (int)strlen(buf) - 1, buf);
868                 ret = -EINVAL;
869         }
870 out:
871         return ret;
872 }
873 static DEVICE_ATTR(ad_select, S_IRUGO | S_IWUSR,
874                    bonding_show_ad_select, bonding_store_ad_select);
875
876 /*
877  * Show and set the number of grat ARP to send after a failover event.
878  */
879 static ssize_t bonding_show_n_grat_arp(struct device *d,
880                                    struct device_attribute *attr,
881                                    char *buf)
882 {
883         struct bonding *bond = to_bond(d);
884
885         return sprintf(buf, "%d\n", bond->params.num_grat_arp);
886 }
887
888 static ssize_t bonding_store_n_grat_arp(struct device *d,
889                                     struct device_attribute *attr,
890                                     const char *buf, size_t count)
891 {
892         int new_value, ret = count;
893         struct bonding *bond = to_bond(d);
894
895         if (sscanf(buf, "%d", &new_value) != 1) {
896                 pr_err("%s: no num_grat_arp value specified.\n",
897                        bond->dev->name);
898                 ret = -EINVAL;
899                 goto out;
900         }
901         if (new_value < 0 || new_value > 255) {
902                 pr_err("%s: Invalid num_grat_arp value %d not in range 0-255; rejected.\n",
903                        bond->dev->name, new_value);
904                 ret = -EINVAL;
905                 goto out;
906         } else {
907                 bond->params.num_grat_arp = new_value;
908         }
909 out:
910         return ret;
911 }
912 static DEVICE_ATTR(num_grat_arp, S_IRUGO | S_IWUSR,
913                    bonding_show_n_grat_arp, bonding_store_n_grat_arp);
914
915 /*
916  * Show and set the number of unsolicited NA's to send after a failover event.
917  */
918 static ssize_t bonding_show_n_unsol_na(struct device *d,
919                                        struct device_attribute *attr,
920                                        char *buf)
921 {
922         struct bonding *bond = to_bond(d);
923
924         return sprintf(buf, "%d\n", bond->params.num_unsol_na);
925 }
926
927 static ssize_t bonding_store_n_unsol_na(struct device *d,
928                                         struct device_attribute *attr,
929                                         const char *buf, size_t count)
930 {
931         int new_value, ret = count;
932         struct bonding *bond = to_bond(d);
933
934         if (sscanf(buf, "%d", &new_value) != 1) {
935                 pr_err("%s: no num_unsol_na value specified.\n",
936                        bond->dev->name);
937                 ret = -EINVAL;
938                 goto out;
939         }
940
941         if (new_value < 0 || new_value > 255) {
942                 pr_err("%s: Invalid num_unsol_na value %d not in range 0-255; rejected.\n",
943                        bond->dev->name, new_value);
944                 ret = -EINVAL;
945                 goto out;
946         } else
947                 bond->params.num_unsol_na = new_value;
948 out:
949         return ret;
950 }
951 static DEVICE_ATTR(num_unsol_na, S_IRUGO | S_IWUSR,
952                    bonding_show_n_unsol_na, bonding_store_n_unsol_na);
953
954 /*
955  * Show and set the MII monitor interval.  There are two tricky bits
956  * here.  First, if MII monitoring is activated, then we must disable
957  * ARP monitoring.  Second, if the timer isn't running, we must
958  * start it.
959  */
960 static ssize_t bonding_show_miimon(struct device *d,
961                                    struct device_attribute *attr,
962                                    char *buf)
963 {
964         struct bonding *bond = to_bond(d);
965
966         return sprintf(buf, "%d\n", bond->params.miimon);
967 }
968
969 static ssize_t bonding_store_miimon(struct device *d,
970                                     struct device_attribute *attr,
971                                     const char *buf, size_t count)
972 {
973         int new_value, ret = count;
974         struct bonding *bond = to_bond(d);
975
976         if (sscanf(buf, "%d", &new_value) != 1) {
977                 pr_err("%s: no miimon value specified.\n",
978                        bond->dev->name);
979                 ret = -EINVAL;
980                 goto out;
981         }
982         if (new_value < 0) {
983                 pr_err("%s: Invalid miimon value %d not in range %d-%d; rejected.\n",
984                        bond->dev->name, new_value, 1, INT_MAX);
985                 ret = -EINVAL;
986                 goto out;
987         } else {
988                 pr_info("%s: Setting MII monitoring interval to %d.\n",
989                         bond->dev->name, new_value);
990                 bond->params.miimon = new_value;
991                 if (bond->params.updelay)
992                         pr_info("%s: Note: Updating updelay (to %d) since it is a multiple of the miimon value.\n",
993                                 bond->dev->name,
994                                 bond->params.updelay * bond->params.miimon);
995                 if (bond->params.downdelay)
996                         pr_info("%s: Note: Updating downdelay (to %d) since it is a multiple of the miimon value.\n",
997                                 bond->dev->name,
998                                 bond->params.downdelay * bond->params.miimon);
999                 if (bond->params.arp_interval) {
1000                         pr_info("%s: MII monitoring cannot be used with ARP monitoring. Disabling ARP monitoring...\n",
1001                                 bond->dev->name);
1002                         bond->params.arp_interval = 0;
1003                         if (bond->params.arp_validate) {
1004                                 bond_unregister_arp(bond);
1005                                 bond->params.arp_validate =
1006                                         BOND_ARP_VALIDATE_NONE;
1007                         }
1008                         if (delayed_work_pending(&bond->arp_work)) {
1009                                 cancel_delayed_work(&bond->arp_work);
1010                                 flush_workqueue(bond->wq);
1011                         }
1012                 }
1013
1014                 if (bond->dev->flags & IFF_UP) {
1015                         /* If the interface is up, we may need to fire off
1016                          * the MII timer. If the interface is down, the
1017                          * timer will get fired off when the open function
1018                          * is called.
1019                          */
1020                         if (!delayed_work_pending(&bond->mii_work)) {
1021                                 INIT_DELAYED_WORK(&bond->mii_work,
1022                                                   bond_mii_monitor);
1023                                 queue_delayed_work(bond->wq,
1024                                                    &bond->mii_work, 0);
1025                         }
1026                 }
1027         }
1028 out:
1029         return ret;
1030 }
1031 static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR,
1032                    bonding_show_miimon, bonding_store_miimon);
1033
1034 /*
1035  * Show and set the primary slave.  The store function is much
1036  * simpler than bonding_store_slaves function because it only needs to
1037  * handle one interface name.
1038  * The bond must be a mode that supports a primary for this be
1039  * set.
1040  */
1041 static ssize_t bonding_show_primary(struct device *d,
1042                                     struct device_attribute *attr,
1043                                     char *buf)
1044 {
1045         int count = 0;
1046         struct bonding *bond = to_bond(d);
1047
1048         if (bond->primary_slave)
1049                 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);
1050
1051         return count;
1052 }
1053
1054 static ssize_t bonding_store_primary(struct device *d,
1055                                      struct device_attribute *attr,
1056                                      const char *buf, size_t count)
1057 {
1058         int i;
1059         struct slave *slave;
1060         struct bonding *bond = to_bond(d);
1061
1062         if (!rtnl_trylock())
1063                 return restart_syscall();
1064         block_netpoll_tx();
1065         read_lock(&bond->lock);
1066         write_lock_bh(&bond->curr_slave_lock);
1067
1068         if (!USES_PRIMARY(bond->params.mode)) {
1069                 pr_info("%s: Unable to set primary slave; %s is in mode %d\n",
1070                         bond->dev->name, bond->dev->name, bond->params.mode);
1071         } else {
1072                 bond_for_each_slave(bond, slave, i) {
1073                         if (strnicmp
1074                             (slave->dev->name, buf,
1075                              strlen(slave->dev->name)) == 0) {
1076                                 pr_info("%s: Setting %s as primary slave.\n",
1077                                         bond->dev->name, slave->dev->name);
1078                                 bond->primary_slave = slave;
1079                                 strcpy(bond->params.primary, slave->dev->name);
1080                                 bond_select_active_slave(bond);
1081                                 goto out;
1082                         }
1083                 }
1084
1085                 /* if we got here, then we didn't match the name of any slave */
1086
1087                 if (strlen(buf) == 0 || buf[0] == '\n') {
1088                         pr_info("%s: Setting primary slave to None.\n",
1089                                 bond->dev->name);
1090                         bond->primary_slave = NULL;
1091                                 bond_select_active_slave(bond);
1092                 } else {
1093                         pr_info("%s: Unable to set %.*s as primary slave as it is not a slave.\n",
1094                                 bond->dev->name, (int)strlen(buf) - 1, buf);
1095                 }
1096         }
1097 out:
1098         write_unlock_bh(&bond->curr_slave_lock);
1099         read_unlock(&bond->lock);
1100         unblock_netpoll_tx();
1101         rtnl_unlock();
1102
1103         return count;
1104 }
1105 static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR,
1106                    bonding_show_primary, bonding_store_primary);
1107
1108 /*
1109  * Show and set the primary_reselect flag.
1110  */
1111 static ssize_t bonding_show_primary_reselect(struct device *d,
1112                                              struct device_attribute *attr,
1113                                              char *buf)
1114 {
1115         struct bonding *bond = to_bond(d);
1116
1117         return sprintf(buf, "%s %d\n",
1118                        pri_reselect_tbl[bond->params.primary_reselect].modename,
1119                        bond->params.primary_reselect);
1120 }
1121
1122 static ssize_t bonding_store_primary_reselect(struct device *d,
1123                                               struct device_attribute *attr,
1124                                               const char *buf, size_t count)
1125 {
1126         int new_value, ret = count;
1127         struct bonding *bond = to_bond(d);
1128
1129         if (!rtnl_trylock())
1130                 return restart_syscall();
1131
1132         new_value = bond_parse_parm(buf, pri_reselect_tbl);
1133         if (new_value < 0)  {
1134                 pr_err("%s: Ignoring invalid primary_reselect value %.*s.\n",
1135                        bond->dev->name,
1136                        (int) strlen(buf) - 1, buf);
1137                 ret = -EINVAL;
1138                 goto out;
1139         }
1140
1141         bond->params.primary_reselect = new_value;
1142         pr_info("%s: setting primary_reselect to %s (%d).\n",
1143                 bond->dev->name, pri_reselect_tbl[new_value].modename,
1144                 new_value);
1145
1146         block_netpoll_tx();
1147         read_lock(&bond->lock);
1148         write_lock_bh(&bond->curr_slave_lock);
1149         bond_select_active_slave(bond);
1150         write_unlock_bh(&bond->curr_slave_lock);
1151         read_unlock(&bond->lock);
1152         unblock_netpoll_tx();
1153 out:
1154         rtnl_unlock();
1155         return ret;
1156 }
1157 static DEVICE_ATTR(primary_reselect, S_IRUGO | S_IWUSR,
1158                    bonding_show_primary_reselect,
1159                    bonding_store_primary_reselect);
1160
1161 /*
1162  * Show and set the use_carrier flag.
1163  */
1164 static ssize_t bonding_show_carrier(struct device *d,
1165                                     struct device_attribute *attr,
1166                                     char *buf)
1167 {
1168         struct bonding *bond = to_bond(d);
1169
1170         return sprintf(buf, "%d\n", bond->params.use_carrier);
1171 }
1172
1173 static ssize_t bonding_store_carrier(struct device *d,
1174                                      struct device_attribute *attr,
1175                                      const char *buf, size_t count)
1176 {
1177         int new_value, ret = count;
1178         struct bonding *bond = to_bond(d);
1179
1180
1181         if (sscanf(buf, "%d", &new_value) != 1) {
1182                 pr_err("%s: no use_carrier value specified.\n",
1183                        bond->dev->name);
1184                 ret = -EINVAL;
1185                 goto out;
1186         }
1187         if ((new_value == 0) || (new_value == 1)) {
1188                 bond->params.use_carrier = new_value;
1189                 pr_info("%s: Setting use_carrier to %d.\n",
1190                         bond->dev->name, new_value);
1191         } else {
1192                 pr_info("%s: Ignoring invalid use_carrier value %d.\n",
1193                         bond->dev->name, new_value);
1194         }
1195 out:
1196         return ret;
1197 }
1198 static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR,
1199                    bonding_show_carrier, bonding_store_carrier);
1200
1201
1202 /*
1203  * Show and set currently active_slave.
1204  */
1205 static ssize_t bonding_show_active_slave(struct device *d,
1206                                          struct device_attribute *attr,
1207                                          char *buf)
1208 {
1209         struct slave *curr;
1210         struct bonding *bond = to_bond(d);
1211         int count = 0;
1212
1213         read_lock(&bond->curr_slave_lock);
1214         curr = bond->curr_active_slave;
1215         read_unlock(&bond->curr_slave_lock);
1216
1217         if (USES_PRIMARY(bond->params.mode) && curr)
1218                 count = sprintf(buf, "%s\n", curr->dev->name);
1219         return count;
1220 }
1221
1222 static ssize_t bonding_store_active_slave(struct device *d,
1223                                           struct device_attribute *attr,
1224                                           const char *buf, size_t count)
1225 {
1226         int i;
1227         struct slave *slave;
1228         struct slave *old_active = NULL;
1229         struct slave *new_active = NULL;
1230         struct bonding *bond = to_bond(d);
1231
1232         if (!rtnl_trylock())
1233                 return restart_syscall();
1234
1235         block_netpoll_tx();
1236         read_lock(&bond->lock);
1237         write_lock_bh(&bond->curr_slave_lock);
1238
1239         if (!USES_PRIMARY(bond->params.mode))
1240                 pr_info("%s: Unable to change active slave; %s is in mode %d\n",
1241                         bond->dev->name, bond->dev->name, bond->params.mode);
1242         else {
1243                 bond_for_each_slave(bond, slave, i) {
1244                         if (strnicmp
1245                             (slave->dev->name, buf,
1246                              strlen(slave->dev->name)) == 0) {
1247                                 old_active = bond->curr_active_slave;
1248                                 new_active = slave;
1249                                 if (new_active == old_active) {
1250                                         /* do nothing */
1251                                         pr_info("%s: %s is already the current active slave.\n",
1252                                                 bond->dev->name,
1253                                                 slave->dev->name);
1254                                         goto out;
1255                                 }
1256                                 else {
1257                                         if ((new_active) &&
1258                                             (old_active) &&
1259                                             (new_active->link == BOND_LINK_UP) &&
1260                                             IS_UP(new_active->dev)) {
1261                                                 pr_info("%s: Setting %s as active slave.\n",
1262                                                         bond->dev->name,
1263                                                         slave->dev->name);
1264                                                         bond_change_active_slave(bond, new_active);
1265                                         }
1266                                         else {
1267                                                 pr_info("%s: Could not set %s as active slave; either %s is down or the link is down.\n",
1268                                                         bond->dev->name,
1269                                                         slave->dev->name,
1270                                                         slave->dev->name);
1271                                         }
1272                                         goto out;
1273                                 }
1274                         }
1275                 }
1276
1277                 /* if we got here, then we didn't match the name of any slave */
1278
1279                 if (strlen(buf) == 0 || buf[0] == '\n') {
1280                         pr_info("%s: Setting active slave to None.\n",
1281                                 bond->dev->name);
1282                         bond->primary_slave = NULL;
1283                         bond_select_active_slave(bond);
1284                 } else {
1285                         pr_info("%s: Unable to set %.*s as active slave as it is not a slave.\n",
1286                                 bond->dev->name, (int)strlen(buf) - 1, buf);
1287                 }
1288         }
1289  out:
1290         write_unlock_bh(&bond->curr_slave_lock);
1291         read_unlock(&bond->lock);
1292         unblock_netpoll_tx();
1293
1294         rtnl_unlock();
1295
1296         return count;
1297
1298 }
1299 static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR,
1300                    bonding_show_active_slave, bonding_store_active_slave);
1301
1302
1303 /*
1304  * Show link status of the bond interface.
1305  */
1306 static ssize_t bonding_show_mii_status(struct device *d,
1307                                        struct device_attribute *attr,
1308                                        char *buf)
1309 {
1310         struct slave *curr;
1311         struct bonding *bond = to_bond(d);
1312
1313         read_lock(&bond->curr_slave_lock);
1314         curr = bond->curr_active_slave;
1315         read_unlock(&bond->curr_slave_lock);
1316
1317         return sprintf(buf, "%s\n", curr ? "up" : "down");
1318 }
1319 static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1320
1321
1322 /*
1323  * Show current 802.3ad aggregator ID.
1324  */
1325 static ssize_t bonding_show_ad_aggregator(struct device *d,
1326                                           struct device_attribute *attr,
1327                                           char *buf)
1328 {
1329         int count = 0;
1330         struct bonding *bond = to_bond(d);
1331
1332         if (bond->params.mode == BOND_MODE_8023AD) {
1333                 struct ad_info ad_info;
1334                 count = sprintf(buf, "%d\n",
1335                                 (bond_3ad_get_active_agg_info(bond, &ad_info))
1336                                 ?  0 : ad_info.aggregator_id);
1337         }
1338
1339         return count;
1340 }
1341 static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1342
1343
1344 /*
1345  * Show number of active 802.3ad ports.
1346  */
1347 static ssize_t bonding_show_ad_num_ports(struct device *d,
1348                                          struct device_attribute *attr,
1349                                          char *buf)
1350 {
1351         int count = 0;
1352         struct bonding *bond = to_bond(d);
1353
1354         if (bond->params.mode == BOND_MODE_8023AD) {
1355                 struct ad_info ad_info;
1356                 count = sprintf(buf, "%d\n",
1357                                 (bond_3ad_get_active_agg_info(bond, &ad_info))
1358                                 ?  0 : ad_info.ports);
1359         }
1360
1361         return count;
1362 }
1363 static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1364
1365
1366 /*
1367  * Show current 802.3ad actor key.
1368  */
1369 static ssize_t bonding_show_ad_actor_key(struct device *d,
1370                                          struct device_attribute *attr,
1371                                          char *buf)
1372 {
1373         int count = 0;
1374         struct bonding *bond = to_bond(d);
1375
1376         if (bond->params.mode == BOND_MODE_8023AD) {
1377                 struct ad_info ad_info;
1378                 count = sprintf(buf, "%d\n",
1379                                 (bond_3ad_get_active_agg_info(bond, &ad_info))
1380                                 ?  0 : ad_info.actor_key);
1381         }
1382
1383         return count;
1384 }
1385 static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1386
1387
1388 /*
1389  * Show current 802.3ad partner key.
1390  */
1391 static ssize_t bonding_show_ad_partner_key(struct device *d,
1392                                            struct device_attribute *attr,
1393                                            char *buf)
1394 {
1395         int count = 0;
1396         struct bonding *bond = to_bond(d);
1397
1398         if (bond->params.mode == BOND_MODE_8023AD) {
1399                 struct ad_info ad_info;
1400                 count = sprintf(buf, "%d\n",
1401                                 (bond_3ad_get_active_agg_info(bond, &ad_info))
1402                                 ?  0 : ad_info.partner_key);
1403         }
1404
1405         return count;
1406 }
1407 static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1408
1409
1410 /*
1411  * Show current 802.3ad partner mac.
1412  */
1413 static ssize_t bonding_show_ad_partner_mac(struct device *d,
1414                                            struct device_attribute *attr,
1415                                            char *buf)
1416 {
1417         int count = 0;
1418         struct bonding *bond = to_bond(d);
1419
1420         if (bond->params.mode == BOND_MODE_8023AD) {
1421                 struct ad_info ad_info;
1422                 if (!bond_3ad_get_active_agg_info(bond, &ad_info))
1423                         count = sprintf(buf, "%pM\n", ad_info.partner_system);
1424         }
1425
1426         return count;
1427 }
1428 static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1429
1430 /*
1431  * Show the queue_ids of the slaves in the current bond.
1432  */
1433 static ssize_t bonding_show_queue_id(struct device *d,
1434                                      struct device_attribute *attr,
1435                                      char *buf)
1436 {
1437         struct slave *slave;
1438         int i, res = 0;
1439         struct bonding *bond = to_bond(d);
1440
1441         if (!rtnl_trylock())
1442                 return restart_syscall();
1443
1444         read_lock(&bond->lock);
1445         bond_for_each_slave(bond, slave, i) {
1446                 if (res > (PAGE_SIZE - IFNAMSIZ - 6)) {
1447                         /* not enough space for another interface_name:queue_id pair */
1448                         if ((PAGE_SIZE - res) > 10)
1449                                 res = PAGE_SIZE - 10;
1450                         res += sprintf(buf + res, "++more++ ");
1451                         break;
1452                 }
1453                 res += sprintf(buf + res, "%s:%d ",
1454                                slave->dev->name, slave->queue_id);
1455         }
1456         read_unlock(&bond->lock);
1457         if (res)
1458                 buf[res-1] = '\n'; /* eat the leftover space */
1459         rtnl_unlock();
1460         return res;
1461 }
1462
1463 /*
1464  * Set the queue_ids of the  slaves in the current bond.  The bond
1465  * interface must be enslaved for this to work.
1466  */
1467 static ssize_t bonding_store_queue_id(struct device *d,
1468                                       struct device_attribute *attr,
1469                                       const char *buffer, size_t count)
1470 {
1471         struct slave *slave, *update_slave;
1472         struct bonding *bond = to_bond(d);
1473         u16 qid;
1474         int i, ret = count;
1475         char *delim;
1476         struct net_device *sdev = NULL;
1477
1478         if (!rtnl_trylock())
1479                 return restart_syscall();
1480
1481         /* delim will point to queue id if successful */
1482         delim = strchr(buffer, ':');
1483         if (!delim)
1484                 goto err_no_cmd;
1485
1486         /*
1487          * Terminate string that points to device name and bump it
1488          * up one, so we can read the queue id there.
1489          */
1490         *delim = '\0';
1491         if (sscanf(++delim, "%hd\n", &qid) != 1)
1492                 goto err_no_cmd;
1493
1494         /* Check buffer length, valid ifname and queue id */
1495         if (strlen(buffer) > IFNAMSIZ ||
1496             !dev_valid_name(buffer) ||
1497             qid > bond->params.tx_queues)
1498                 goto err_no_cmd;
1499
1500         /* Get the pointer to that interface if it exists */
1501         sdev = __dev_get_by_name(dev_net(bond->dev), buffer);
1502         if (!sdev)
1503                 goto err_no_cmd;
1504
1505         read_lock(&bond->lock);
1506
1507         /* Search for thes slave and check for duplicate qids */
1508         update_slave = NULL;
1509         bond_for_each_slave(bond, slave, i) {
1510                 if (sdev == slave->dev)
1511                         /*
1512                          * We don't need to check the matching
1513                          * slave for dups, since we're overwriting it
1514                          */
1515                         update_slave = slave;
1516                 else if (qid && qid == slave->queue_id) {
1517                         goto err_no_cmd_unlock;
1518                 }
1519         }
1520
1521         if (!update_slave)
1522                 goto err_no_cmd_unlock;
1523
1524         /* Actually set the qids for the slave */
1525         update_slave->queue_id = qid;
1526
1527         read_unlock(&bond->lock);
1528 out:
1529         rtnl_unlock();
1530         return ret;
1531
1532 err_no_cmd_unlock:
1533         read_unlock(&bond->lock);
1534 err_no_cmd:
1535         pr_info("invalid input for queue_id set for %s.\n",
1536                 bond->dev->name);
1537         ret = -EPERM;
1538         goto out;
1539 }
1540
1541 static DEVICE_ATTR(queue_id, S_IRUGO | S_IWUSR, bonding_show_queue_id,
1542                    bonding_store_queue_id);
1543
1544
1545 /*
1546  * Show and set the all_slaves_active flag.
1547  */
1548 static ssize_t bonding_show_slaves_active(struct device *d,
1549                                           struct device_attribute *attr,
1550                                           char *buf)
1551 {
1552         struct bonding *bond = to_bond(d);
1553
1554         return sprintf(buf, "%d\n", bond->params.all_slaves_active);
1555 }
1556
1557 static ssize_t bonding_store_slaves_active(struct device *d,
1558                                            struct device_attribute *attr,
1559                                            const char *buf, size_t count)
1560 {
1561         int i, new_value, ret = count;
1562         struct bonding *bond = to_bond(d);
1563         struct slave *slave;
1564
1565         if (sscanf(buf, "%d", &new_value) != 1) {
1566                 pr_err("%s: no all_slaves_active value specified.\n",
1567                        bond->dev->name);
1568                 ret = -EINVAL;
1569                 goto out;
1570         }
1571
1572         if (new_value == bond->params.all_slaves_active)
1573                 goto out;
1574
1575         if ((new_value == 0) || (new_value == 1)) {
1576                 bond->params.all_slaves_active = new_value;
1577         } else {
1578                 pr_info("%s: Ignoring invalid all_slaves_active value %d.\n",
1579                         bond->dev->name, new_value);
1580                 ret = -EINVAL;
1581                 goto out;
1582         }
1583
1584         bond_for_each_slave(bond, slave, i) {
1585                 if (!bond_is_active_slave(slave)) {
1586                         if (new_value)
1587                                 slave->inactive = 0;
1588                         else
1589                                 slave->inactive = 1;
1590                 }
1591         }
1592 out:
1593         return ret;
1594 }
1595 static DEVICE_ATTR(all_slaves_active, S_IRUGO | S_IWUSR,
1596                    bonding_show_slaves_active, bonding_store_slaves_active);
1597
1598 /*
1599  * Show and set the number of IGMP membership reports to send on link failure
1600  */
1601 static ssize_t bonding_show_resend_igmp(struct device *d,
1602                                          struct device_attribute *attr,
1603                                          char *buf)
1604 {
1605         struct bonding *bond = to_bond(d);
1606
1607         return sprintf(buf, "%d\n", bond->params.resend_igmp);
1608 }
1609
1610 static ssize_t bonding_store_resend_igmp(struct device *d,
1611                                           struct device_attribute *attr,
1612                                           const char *buf, size_t count)
1613 {
1614         int new_value, ret = count;
1615         struct bonding *bond = to_bond(d);
1616
1617         if (sscanf(buf, "%d", &new_value) != 1) {
1618                 pr_err("%s: no resend_igmp value specified.\n",
1619                        bond->dev->name);
1620                 ret = -EINVAL;
1621                 goto out;
1622         }
1623
1624         if (new_value < 0) {
1625                 pr_err("%s: Invalid resend_igmp value %d not in range 0-255; rejected.\n",
1626                        bond->dev->name, new_value);
1627                 ret = -EINVAL;
1628                 goto out;
1629         }
1630
1631         pr_info("%s: Setting resend_igmp to %d.\n",
1632                 bond->dev->name, new_value);
1633         bond->params.resend_igmp = new_value;
1634 out:
1635         return ret;
1636 }
1637
1638 static DEVICE_ATTR(resend_igmp, S_IRUGO | S_IWUSR,
1639                    bonding_show_resend_igmp, bonding_store_resend_igmp);
1640
1641 static struct attribute *per_bond_attrs[] = {
1642         &dev_attr_slaves.attr,
1643         &dev_attr_mode.attr,
1644         &dev_attr_fail_over_mac.attr,
1645         &dev_attr_arp_validate.attr,
1646         &dev_attr_arp_interval.attr,
1647         &dev_attr_arp_ip_target.attr,
1648         &dev_attr_downdelay.attr,
1649         &dev_attr_updelay.attr,
1650         &dev_attr_lacp_rate.attr,
1651         &dev_attr_ad_select.attr,
1652         &dev_attr_xmit_hash_policy.attr,
1653         &dev_attr_num_grat_arp.attr,
1654         &dev_attr_num_unsol_na.attr,
1655         &dev_attr_miimon.attr,
1656         &dev_attr_primary.attr,
1657         &dev_attr_primary_reselect.attr,
1658         &dev_attr_use_carrier.attr,
1659         &dev_attr_active_slave.attr,
1660         &dev_attr_mii_status.attr,
1661         &dev_attr_ad_aggregator.attr,
1662         &dev_attr_ad_num_ports.attr,
1663         &dev_attr_ad_actor_key.attr,
1664         &dev_attr_ad_partner_key.attr,
1665         &dev_attr_ad_partner_mac.attr,
1666         &dev_attr_queue_id.attr,
1667         &dev_attr_all_slaves_active.attr,
1668         &dev_attr_resend_igmp.attr,
1669         NULL,
1670 };
1671
1672 static struct attribute_group bonding_group = {
1673         .name = "bonding",
1674         .attrs = per_bond_attrs,
1675 };
1676
1677 /*
1678  * Initialize sysfs.  This sets up the bonding_masters file in
1679  * /sys/class/net.
1680  */
1681 int bond_create_sysfs(void)
1682 {
1683         int ret;
1684
1685         ret = netdev_class_create_file(&class_attr_bonding_masters);
1686         /*
1687          * Permit multiple loads of the module by ignoring failures to
1688          * create the bonding_masters sysfs file.  Bonding devices
1689          * created by second or subsequent loads of the module will
1690          * not be listed in, or controllable by, bonding_masters, but
1691          * will have the usual "bonding" sysfs directory.
1692          *
1693          * This is done to preserve backwards compatibility for
1694          * initscripts/sysconfig, which load bonding multiple times to
1695          * configure multiple bonding devices.
1696          */
1697         if (ret == -EEXIST) {
1698                 /* Is someone being kinky and naming a device bonding_master? */
1699                 if (__dev_get_by_name(&init_net,
1700                                       class_attr_bonding_masters.attr.name))
1701                         pr_err("network device named %s already exists in sysfs",
1702                                class_attr_bonding_masters.attr.name);
1703                 ret = 0;
1704         }
1705
1706         return ret;
1707
1708 }
1709
1710 /*
1711  * Remove /sys/class/net/bonding_masters.
1712  */
1713 void bond_destroy_sysfs(void)
1714 {
1715         netdev_class_remove_file(&class_attr_bonding_masters);
1716 }
1717
1718 /*
1719  * Initialize sysfs for each bond.  This sets up and registers
1720  * the 'bondctl' directory for each individual bond under /sys/class/net.
1721  */
1722 void bond_prepare_sysfs_group(struct bonding *bond)
1723 {
1724         bond->dev->sysfs_groups[0] = &bonding_group;
1725 }
1726