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nilfs2: unbreak compat ioctl
[zen-stable.git] / drivers / net / bonding / bond_sysfs.c
blob4ef7e2fd9fe6f5b577c13fc56a5b2ae45a54a0bd
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 bond_net *bn =
59 container_of(attr, struct bond_net, class_attr_bonding_masters);
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 bond_net *bn, const char *ifname)
83 {
84 struct bonding *bond;
85
86 list_for_each_entry(bond, &bn->dev_list, bond_list) {
87 if (strncmp(bond->dev->name, ifname, IFNAMSIZ) == 0)
88 return bond->dev;
89 }
90 return NULL;
91 }
92
93 /*
94 * "store" function for the bond_masters attribute. This is what
95 * creates and deletes entire bonds.
96 *
97 * The class parameter is ignored.
98 *
99 */
100
101 static ssize_t bonding_store_bonds(struct class *cls,
102 struct class_attribute *attr,
103 const char *buffer, size_t count)
104 {
105 struct bond_net *bn =
106 container_of(attr, struct bond_net, class_attr_bonding_masters);
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(bn->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(bn, 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 static const void *bonding_namespace(struct class *cls,
154 const struct class_attribute *attr)
155 {
156 const struct bond_net *bn =
157 container_of(attr, struct bond_net, class_attr_bonding_masters);
158 return bn->net;
159 }
160
161 /* class attribute for bond_masters file. This ends up in /sys/class/net */
162 static const struct class_attribute class_attr_bonding_masters = {
163 .attr = {
164 .name = "bonding_masters",
165 .mode = S_IWUSR | S_IRUGO,
166 },
167 .show = bonding_show_bonds,
168 .store = bonding_store_bonds,
169 .namespace = bonding_namespace,
170 };
171
172 int bond_create_slave_symlinks(struct net_device *master,
173 struct net_device *slave)
174 {
175 char linkname[IFNAMSIZ+7];
176 int ret = 0;
177
178 /* first, create a link from the slave back to the master */
179 ret = sysfs_create_link(&(slave->dev.kobj), &(master->dev.kobj),
180 "master");
181 if (ret)
182 return ret;
183 /* next, create a link from the master to the slave */
184 sprintf(linkname, "slave_%s", slave->name);
185 ret = sysfs_create_link(&(master->dev.kobj), &(slave->dev.kobj),
186 linkname);
187 return ret;
188
189 }
190
191 void bond_destroy_slave_symlinks(struct net_device *master,
192 struct net_device *slave)
193 {
194 char linkname[IFNAMSIZ+7];
195
196 sysfs_remove_link(&(slave->dev.kobj), "master");
197 sprintf(linkname, "slave_%s", slave->name);
198 sysfs_remove_link(&(master->dev.kobj), linkname);
199 }
200
201
202 /*
203 * Show the slaves in the current bond.
204 */
205 static ssize_t bonding_show_slaves(struct device *d,
206 struct device_attribute *attr, char *buf)
207 {
208 struct slave *slave;
209 int i, res = 0;
210 struct bonding *bond = to_bond(d);
211
212 read_lock(&bond->lock);
213 bond_for_each_slave(bond, slave, i) {
214 if (res > (PAGE_SIZE - IFNAMSIZ)) {
215 /* not enough space for another interface name */
216 if ((PAGE_SIZE - res) > 10)
217 res = PAGE_SIZE - 10;
218 res += sprintf(buf + res, "++more++ ");
219 break;
220 }
221 res += sprintf(buf + res, "%s ", slave->dev->name);
222 }
223 read_unlock(&bond->lock);
224 if (res)
225 buf[res-1] = '\n'; /* eat the leftover space */
226 return res;
227 }
228
229 /*
230 * Set the slaves in the current bond. The bond interface must be
231 * up for this to succeed.
232 * This is supposed to be only thin wrapper for bond_enslave and bond_release.
233 * All hard work should be done there.
234 */
235 static ssize_t bonding_store_slaves(struct device *d,
236 struct device_attribute *attr,
237 const char *buffer, size_t count)
238 {
239 char command[IFNAMSIZ + 1] = { 0, };
240 char *ifname;
241 int res, ret = count;
242 struct net_device *dev;
243 struct bonding *bond = to_bond(d);
244
245 if (!rtnl_trylock())
246 return restart_syscall();
247
248 sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
249 ifname = command + 1;
250 if ((strlen(command) <= 1) ||
251 !dev_valid_name(ifname))
252 goto err_no_cmd;
253
254 dev = __dev_get_by_name(dev_net(bond->dev), ifname);
255 if (!dev) {
256 pr_info("%s: Interface %s does not exist!\n",
257 bond->dev->name, ifname);
258 ret = -ENODEV;
259 goto out;
260 }
261
262 switch (command[0]) {
263 case '+':
264 pr_info("%s: Adding slave %s.\n", bond->dev->name, dev->name);
265 res = bond_enslave(bond->dev, dev);
266 break;
267
268 case '-':
269 pr_info("%s: Removing slave %s.\n", bond->dev->name, dev->name);
270 res = bond_release(bond->dev, dev);
271 break;
272
273 default:
274 goto err_no_cmd;
275 }
276
277 if (res)
278 ret = res;
279 goto out;
280
281 err_no_cmd:
282 pr_err("no command found in slaves file for bond %s. Use +ifname or -ifname.\n",
283 bond->dev->name);
284 ret = -EPERM;
285
286 out:
287 rtnl_unlock();
288 return ret;
289 }
290
291 static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves,
292 bonding_store_slaves);
293
294 /*
295 * Show and set the bonding mode. The bond interface must be down to
296 * change the mode.
297 */
298 static ssize_t bonding_show_mode(struct device *d,
299 struct device_attribute *attr, char *buf)
300 {
301 struct bonding *bond = to_bond(d);
302
303 return sprintf(buf, "%s %d\n",
304 bond_mode_tbl[bond->params.mode].modename,
305 bond->params.mode);
306 }
307
308 static ssize_t bonding_store_mode(struct device *d,
309 struct device_attribute *attr,
310 const char *buf, size_t count)
311 {
312 int new_value, ret = count;
313 struct bonding *bond = to_bond(d);
314
315 if (bond->dev->flags & IFF_UP) {
316 pr_err("unable to update mode of %s because interface is up.\n",
317 bond->dev->name);
318 ret = -EPERM;
319 goto out;
320 }
321
322 if (bond->slave_cnt > 0) {
323 pr_err("unable to update mode of %s because it has slaves.\n",
324 bond->dev->name);
325 ret = -EPERM;
326 goto out;
327 }
328
329 new_value = bond_parse_parm(buf, bond_mode_tbl);
330 if (new_value < 0) {
331 pr_err("%s: Ignoring invalid mode value %.*s.\n",
332 bond->dev->name, (int)strlen(buf) - 1, buf);
333 ret = -EINVAL;
334 goto out;
335 }
336 if ((new_value == BOND_MODE_ALB ||
337 new_value == BOND_MODE_TLB) &&
338 bond->params.arp_interval) {
339 pr_err("%s: %s mode is incompatible with arp monitoring.\n",
340 bond->dev->name, bond_mode_tbl[new_value].modename);
341 ret = -EINVAL;
342 goto out;
343 }
344
345 bond->params.mode = new_value;
346 bond_set_mode_ops(bond, bond->params.mode);
347 pr_info("%s: setting mode to %s (%d).\n",
348 bond->dev->name, bond_mode_tbl[new_value].modename,
349 new_value);
350 out:
351 return ret;
352 }
353 static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,
354 bonding_show_mode, bonding_store_mode);
355
356 /*
357 * Show and set the bonding transmit hash method.
358 * The bond interface must be down to change the xmit hash policy.
359 */
360 static ssize_t bonding_show_xmit_hash(struct device *d,
361 struct device_attribute *attr,
362 char *buf)
363 {
364 struct bonding *bond = to_bond(d);
365
366 return sprintf(buf, "%s %d\n",
367 xmit_hashtype_tbl[bond->params.xmit_policy].modename,
368 bond->params.xmit_policy);
369 }
370
371 static ssize_t bonding_store_xmit_hash(struct device *d,
372 struct device_attribute *attr,
373 const char *buf, size_t count)
374 {
375 int new_value, ret = count;
376 struct bonding *bond = to_bond(d);
377
378 if (bond->dev->flags & IFF_UP) {
379 pr_err("%s: Interface is up. Unable to update xmit policy.\n",
380 bond->dev->name);
381 ret = -EPERM;
382 goto out;
383 }
384
385 new_value = bond_parse_parm(buf, xmit_hashtype_tbl);
386 if (new_value < 0) {
387 pr_err("%s: Ignoring invalid xmit hash policy value %.*s.\n",
388 bond->dev->name,
389 (int)strlen(buf) - 1, buf);
390 ret = -EINVAL;
391 goto out;
392 } else {
393 bond->params.xmit_policy = new_value;
394 bond_set_mode_ops(bond, bond->params.mode);
395 pr_info("%s: setting xmit hash policy to %s (%d).\n",
396 bond->dev->name,
397 xmit_hashtype_tbl[new_value].modename, new_value);
398 }
399 out:
400 return ret;
401 }
402 static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR,
403 bonding_show_xmit_hash, bonding_store_xmit_hash);
404
405 /*
406 * Show and set arp_validate.
407 */
408 static ssize_t bonding_show_arp_validate(struct device *d,
409 struct device_attribute *attr,
410 char *buf)
411 {
412 struct bonding *bond = to_bond(d);
413
414 return sprintf(buf, "%s %d\n",
415 arp_validate_tbl[bond->params.arp_validate].modename,
416 bond->params.arp_validate);
417 }
418
419 static ssize_t bonding_store_arp_validate(struct device *d,
420 struct device_attribute *attr,
421 const char *buf, size_t count)
422 {
423 int new_value;
424 struct bonding *bond = to_bond(d);
425
426 new_value = bond_parse_parm(buf, arp_validate_tbl);
427 if (new_value < 0) {
428 pr_err("%s: Ignoring invalid arp_validate value %s\n",
429 bond->dev->name, buf);
430 return -EINVAL;
431 }
432 if (new_value && (bond->params.mode != BOND_MODE_ACTIVEBACKUP)) {
433 pr_err("%s: arp_validate only supported in active-backup mode.\n",
434 bond->dev->name);
435 return -EINVAL;
436 }
437 pr_info("%s: setting arp_validate to %s (%d).\n",
438 bond->dev->name, arp_validate_tbl[new_value].modename,
439 new_value);
440
441 bond->params.arp_validate = new_value;
442
443 return count;
444 }
445
446 static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate,
447 bonding_store_arp_validate);
448
449 /*
450 * Show and store fail_over_mac. User only allowed to change the
451 * value when there are no slaves.
452 */
453 static ssize_t bonding_show_fail_over_mac(struct device *d,
454 struct device_attribute *attr,
455 char *buf)
456 {
457 struct bonding *bond = to_bond(d);
458
459 return sprintf(buf, "%s %d\n",
460 fail_over_mac_tbl[bond->params.fail_over_mac].modename,
461 bond->params.fail_over_mac);
462 }
463
464 static ssize_t bonding_store_fail_over_mac(struct device *d,
465 struct device_attribute *attr,
466 const char *buf, size_t count)
467 {
468 int new_value;
469 struct bonding *bond = to_bond(d);
470
471 if (bond->slave_cnt != 0) {
472 pr_err("%s: Can't alter fail_over_mac with slaves in bond.\n",
473 bond->dev->name);
474 return -EPERM;
475 }
476
477 new_value = bond_parse_parm(buf, fail_over_mac_tbl);
478 if (new_value < 0) {
479 pr_err("%s: Ignoring invalid fail_over_mac value %s.\n",
480 bond->dev->name, buf);
481 return -EINVAL;
482 }
483
484 bond->params.fail_over_mac = new_value;
485 pr_info("%s: Setting fail_over_mac to %s (%d).\n",
486 bond->dev->name, fail_over_mac_tbl[new_value].modename,
487 new_value);
488
489 return count;
490 }
491
492 static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR,
493 bonding_show_fail_over_mac, bonding_store_fail_over_mac);
494
495 /*
496 * Show and set the arp timer interval. There are two tricky bits
497 * here. First, if ARP monitoring is activated, then we must disable
498 * MII monitoring. Second, if the ARP timer isn't running, we must
499 * start it.
500 */
501 static ssize_t bonding_show_arp_interval(struct device *d,
502 struct device_attribute *attr,
503 char *buf)
504 {
505 struct bonding *bond = to_bond(d);
506
507 return sprintf(buf, "%d\n", bond->params.arp_interval);
508 }
509
510 static ssize_t bonding_store_arp_interval(struct device *d,
511 struct device_attribute *attr,
512 const char *buf, size_t count)
513 {
514 int new_value, ret = count;
515 struct bonding *bond = to_bond(d);
516
517 if (sscanf(buf, "%d", &new_value) != 1) {
518 pr_err("%s: no arp_interval value specified.\n",
519 bond->dev->name);
520 ret = -EINVAL;
521 goto out;
522 }
523 if (new_value < 0) {
524 pr_err("%s: Invalid arp_interval value %d not in range 1-%d; rejected.\n",
525 bond->dev->name, new_value, INT_MAX);
526 ret = -EINVAL;
527 goto out;
528 }
529 if (bond->params.mode == BOND_MODE_ALB ||
530 bond->params.mode == BOND_MODE_TLB) {
531 pr_info("%s: ARP monitoring cannot be used with ALB/TLB. Only MII monitoring is supported on %s.\n",
532 bond->dev->name, bond->dev->name);
533 ret = -EINVAL;
534 goto out;
535 }
536 pr_info("%s: Setting ARP monitoring interval to %d.\n",
537 bond->dev->name, new_value);
538 bond->params.arp_interval = new_value;
539 if (bond->params.miimon) {
540 pr_info("%s: ARP monitoring cannot be used with MII monitoring. %s Disabling MII monitoring.\n",
541 bond->dev->name, bond->dev->name);
542 bond->params.miimon = 0;
543 if (delayed_work_pending(&bond->mii_work)) {
544 cancel_delayed_work(&bond->mii_work);
545 flush_workqueue(bond->wq);
546 }
547 }
548 if (!bond->params.arp_targets[0]) {
549 pr_info("%s: ARP monitoring has been set up, but no ARP targets have been specified.\n",
550 bond->dev->name);
551 }
552 if (bond->dev->flags & IFF_UP) {
553 /* If the interface is up, we may need to fire off
554 * the ARP timer. If the interface is down, the
555 * timer will get fired off when the open function
556 * is called.
557 */
558 if (!delayed_work_pending(&bond->arp_work)) {
559 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP)
560 INIT_DELAYED_WORK(&bond->arp_work,
561 bond_activebackup_arp_mon);
562 else
563 INIT_DELAYED_WORK(&bond->arp_work,
564 bond_loadbalance_arp_mon);
565
566 queue_delayed_work(bond->wq, &bond->arp_work, 0);
567 }
568 }
569
570 out:
571 return ret;
572 }
573 static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR,
574 bonding_show_arp_interval, bonding_store_arp_interval);
575
576 /*
577 * Show and set the arp targets.
578 */
579 static ssize_t bonding_show_arp_targets(struct device *d,
580 struct device_attribute *attr,
581 char *buf)
582 {
583 int i, res = 0;
584 struct bonding *bond = to_bond(d);
585
586 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
587 if (bond->params.arp_targets[i])
588 res += sprintf(buf + res, "%pI4 ",
589 &bond->params.arp_targets[i]);
590 }
591 if (res)
592 buf[res-1] = '\n'; /* eat the leftover space */
593 return res;
594 }
595
596 static ssize_t bonding_store_arp_targets(struct device *d,
597 struct device_attribute *attr,
598 const char *buf, size_t count)
599 {
600 __be32 newtarget;
601 int i = 0, done = 0, ret = count;
602 struct bonding *bond = to_bond(d);
603 __be32 *targets;
604
605 targets = bond->params.arp_targets;
606 newtarget = in_aton(buf + 1);
607 /* look for adds */
608 if (buf[0] == '+') {
609 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
610 pr_err("%s: invalid ARP target %pI4 specified for addition\n",
611 bond->dev->name, &newtarget);
612 ret = -EINVAL;
613 goto out;
614 }
615 /* look for an empty slot to put the target in, and check for dupes */
616 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
617 if (targets[i] == newtarget) { /* duplicate */
618 pr_err("%s: ARP target %pI4 is already present\n",
619 bond->dev->name, &newtarget);
620 ret = -EINVAL;
621 goto out;
622 }
623 if (targets[i] == 0) {
624 pr_info("%s: adding ARP target %pI4.\n",
625 bond->dev->name, &newtarget);
626 done = 1;
627 targets[i] = newtarget;
628 }
629 }
630 if (!done) {
631 pr_err("%s: ARP target table is full!\n",
632 bond->dev->name);
633 ret = -EINVAL;
634 goto out;
635 }
636
637 } else if (buf[0] == '-') {
638 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
639 pr_err("%s: invalid ARP target %pI4 specified for removal\n",
640 bond->dev->name, &newtarget);
641 ret = -EINVAL;
642 goto out;
643 }
644
645 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
646 if (targets[i] == newtarget) {
647 int j;
648 pr_info("%s: removing ARP target %pI4.\n",
649 bond->dev->name, &newtarget);
650 for (j = i; (j < (BOND_MAX_ARP_TARGETS-1)) && targets[j+1]; j++)
651 targets[j] = targets[j+1];
652
653 targets[j] = 0;
654 done = 1;
655 }
656 }
657 if (!done) {
658 pr_info("%s: unable to remove nonexistent ARP target %pI4.\n",
659 bond->dev->name, &newtarget);
660 ret = -EINVAL;
661 goto out;
662 }
663 } else {
664 pr_err("no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
665 bond->dev->name);
666 ret = -EPERM;
667 goto out;
668 }
669
670 out:
671 return ret;
672 }
673 static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
674
675 /*
676 * Show and set the up and down delays. These must be multiples of the
677 * MII monitoring value, and are stored internally as the multiplier.
678 * Thus, we must translate to MS for the real world.
679 */
680 static ssize_t bonding_show_downdelay(struct device *d,
681 struct device_attribute *attr,
682 char *buf)
683 {
684 struct bonding *bond = to_bond(d);
685
686 return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
687 }
688
689 static ssize_t bonding_store_downdelay(struct device *d,
690 struct device_attribute *attr,
691 const char *buf, size_t count)
692 {
693 int new_value, ret = count;
694 struct bonding *bond = to_bond(d);
695
696 if (!(bond->params.miimon)) {
697 pr_err("%s: Unable to set down delay as MII monitoring is disabled\n",
698 bond->dev->name);
699 ret = -EPERM;
700 goto out;
701 }
702
703 if (sscanf(buf, "%d", &new_value) != 1) {
704 pr_err("%s: no down delay value specified.\n", bond->dev->name);
705 ret = -EINVAL;
706 goto out;
707 }
708 if (new_value < 0) {
709 pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n",
710 bond->dev->name, new_value, 1, INT_MAX);
711 ret = -EINVAL;
712 goto out;
713 } else {
714 if ((new_value % bond->params.miimon) != 0) {
715 pr_warning("%s: Warning: down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
716 bond->dev->name, new_value,
717 bond->params.miimon,
718 (new_value / bond->params.miimon) *
719 bond->params.miimon);
720 }
721 bond->params.downdelay = new_value / bond->params.miimon;
722 pr_info("%s: Setting down delay to %d.\n",
723 bond->dev->name,
724 bond->params.downdelay * bond->params.miimon);
725
726 }
727
728 out:
729 return ret;
730 }
731 static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR,
732 bonding_show_downdelay, bonding_store_downdelay);
733
734 static ssize_t bonding_show_updelay(struct device *d,
735 struct device_attribute *attr,
736 char *buf)
737 {
738 struct bonding *bond = to_bond(d);
739
740 return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
741
742 }
743
744 static ssize_t bonding_store_updelay(struct device *d,
745 struct device_attribute *attr,
746 const char *buf, size_t count)
747 {
748 int new_value, ret = count;
749 struct bonding *bond = to_bond(d);
750
751 if (!(bond->params.miimon)) {
752 pr_err("%s: Unable to set up delay as MII monitoring is disabled\n",
753 bond->dev->name);
754 ret = -EPERM;
755 goto out;
756 }
757
758 if (sscanf(buf, "%d", &new_value) != 1) {
759 pr_err("%s: no up delay value specified.\n",
760 bond->dev->name);
761 ret = -EINVAL;
762 goto out;
763 }
764 if (new_value < 0) {
765 pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n",
766 bond->dev->name, new_value, 1, INT_MAX);
767 ret = -EINVAL;
768 goto out;
769 } else {
770 if ((new_value % bond->params.miimon) != 0) {
771 pr_warning("%s: Warning: up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
772 bond->dev->name, new_value,
773 bond->params.miimon,
774 (new_value / bond->params.miimon) *
775 bond->params.miimon);
776 }
777 bond->params.updelay = new_value / bond->params.miimon;
778 pr_info("%s: Setting up delay to %d.\n",
779 bond->dev->name,
780 bond->params.updelay * bond->params.miimon);
781 }
782
783 out:
784 return ret;
785 }
786 static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR,
787 bonding_show_updelay, bonding_store_updelay);
788
789 /*
790 * Show and set the LACP interval. Interface must be down, and the mode
791 * must be set to 802.3ad mode.
792 */
793 static ssize_t bonding_show_lacp(struct device *d,
794 struct device_attribute *attr,
795 char *buf)
796 {
797 struct bonding *bond = to_bond(d);
798
799 return sprintf(buf, "%s %d\n",
800 bond_lacp_tbl[bond->params.lacp_fast].modename,
801 bond->params.lacp_fast);
802 }
803
804 static ssize_t bonding_store_lacp(struct device *d,
805 struct device_attribute *attr,
806 const char *buf, size_t count)
807 {
808 int new_value, ret = count;
809 struct bonding *bond = to_bond(d);
810
811 if (bond->dev->flags & IFF_UP) {
812 pr_err("%s: Unable to update LACP rate because interface is up.\n",
813 bond->dev->name);
814 ret = -EPERM;
815 goto out;
816 }
817
818 if (bond->params.mode != BOND_MODE_8023AD) {
819 pr_err("%s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
820 bond->dev->name);
821 ret = -EPERM;
822 goto out;
823 }
824
825 new_value = bond_parse_parm(buf, bond_lacp_tbl);
826
827 if ((new_value == 1) || (new_value == 0)) {
828 bond->params.lacp_fast = new_value;
829 bond_3ad_update_lacp_rate(bond);
830 pr_info("%s: Setting LACP rate to %s (%d).\n",
831 bond->dev->name, bond_lacp_tbl[new_value].modename,
832 new_value);
833 } else {
834 pr_err("%s: Ignoring invalid LACP rate value %.*s.\n",
835 bond->dev->name, (int)strlen(buf) - 1, buf);
836 ret = -EINVAL;
837 }
838 out:
839 return ret;
840 }
841 static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR,
842 bonding_show_lacp, bonding_store_lacp);
843
844 static ssize_t bonding_show_min_links(struct device *d,
845 struct device_attribute *attr,
846 char *buf)
847 {
848 struct bonding *bond = to_bond(d);
849
850 return sprintf(buf, "%d\n", bond->params.min_links);
851 }
852
853 static ssize_t bonding_store_min_links(struct device *d,
854 struct device_attribute *attr,
855 const char *buf, size_t count)
856 {
857 struct bonding *bond = to_bond(d);
858 int ret;
859 unsigned int new_value;
860
861 ret = kstrtouint(buf, 0, &new_value);
862 if (ret < 0) {
863 pr_err("%s: Ignoring invalid min links value %s.\n",
864 bond->dev->name, buf);
865 return ret;
866 }
867
868 pr_info("%s: Setting min links value to %u\n",
869 bond->dev->name, new_value);
870 bond->params.min_links = new_value;
871 return count;
872 }
873 static DEVICE_ATTR(min_links, S_IRUGO | S_IWUSR,
874 bonding_show_min_links, bonding_store_min_links);
875
876 static ssize_t bonding_show_ad_select(struct device *d,
877 struct device_attribute *attr,
878 char *buf)
879 {
880 struct bonding *bond = to_bond(d);
881
882 return sprintf(buf, "%s %d\n",
883 ad_select_tbl[bond->params.ad_select].modename,
884 bond->params.ad_select);
885 }
886
887
888 static ssize_t bonding_store_ad_select(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 (bond->dev->flags & IFF_UP) {
896 pr_err("%s: Unable to update ad_select because interface is up.\n",
897 bond->dev->name);
898 ret = -EPERM;
899 goto out;
900 }
901
902 new_value = bond_parse_parm(buf, ad_select_tbl);
903
904 if (new_value != -1) {
905 bond->params.ad_select = new_value;
906 pr_info("%s: Setting ad_select to %s (%d).\n",
907 bond->dev->name, ad_select_tbl[new_value].modename,
908 new_value);
909 } else {
910 pr_err("%s: Ignoring invalid ad_select value %.*s.\n",
911 bond->dev->name, (int)strlen(buf) - 1, buf);
912 ret = -EINVAL;
913 }
914 out:
915 return ret;
916 }
917 static DEVICE_ATTR(ad_select, S_IRUGO | S_IWUSR,
918 bonding_show_ad_select, bonding_store_ad_select);
919
920 /*
921 * Show and set the number of peer notifications to send after a failover event.
922 */
923 static ssize_t bonding_show_num_peer_notif(struct device *d,
924 struct device_attribute *attr,
925 char *buf)
926 {
927 struct bonding *bond = to_bond(d);
928 return sprintf(buf, "%d\n", bond->params.num_peer_notif);
929 }
930
931 static ssize_t bonding_store_num_peer_notif(struct device *d,
932 struct device_attribute *attr,
933 const char *buf, size_t count)
934 {
935 struct bonding *bond = to_bond(d);
936 int err = kstrtou8(buf, 10, &bond->params.num_peer_notif);
937 return err ? err : count;
938 }
939 static DEVICE_ATTR(num_grat_arp, S_IRUGO | S_IWUSR,
940 bonding_show_num_peer_notif, bonding_store_num_peer_notif);
941 static DEVICE_ATTR(num_unsol_na, S_IRUGO | S_IWUSR,
942 bonding_show_num_peer_notif, bonding_store_num_peer_notif);
943
944 /*
945 * Show and set the MII monitor interval. There are two tricky bits
946 * here. First, if MII monitoring is activated, then we must disable
947 * ARP monitoring. Second, if the timer isn't running, we must
948 * start it.
949 */
950 static ssize_t bonding_show_miimon(struct device *d,
951 struct device_attribute *attr,
952 char *buf)
953 {
954 struct bonding *bond = to_bond(d);
955
956 return sprintf(buf, "%d\n", bond->params.miimon);
957 }
958
959 static ssize_t bonding_store_miimon(struct device *d,
960 struct device_attribute *attr,
961 const char *buf, size_t count)
962 {
963 int new_value, ret = count;
964 struct bonding *bond = to_bond(d);
965
966 if (sscanf(buf, "%d", &new_value) != 1) {
967 pr_err("%s: no miimon value specified.\n",
968 bond->dev->name);
969 ret = -EINVAL;
970 goto out;
971 }
972 if (new_value < 0) {
973 pr_err("%s: Invalid miimon value %d not in range %d-%d; rejected.\n",
974 bond->dev->name, new_value, 1, INT_MAX);
975 ret = -EINVAL;
976 goto out;
977 } else {
978 pr_info("%s: Setting MII monitoring interval to %d.\n",
979 bond->dev->name, new_value);
980 bond->params.miimon = new_value;
981 if (bond->params.updelay)
982 pr_info("%s: Note: Updating updelay (to %d) since it is a multiple of the miimon value.\n",
983 bond->dev->name,
984 bond->params.updelay * bond->params.miimon);
985 if (bond->params.downdelay)
986 pr_info("%s: Note: Updating downdelay (to %d) since it is a multiple of the miimon value.\n",
987 bond->dev->name,
988 bond->params.downdelay * bond->params.miimon);
989 if (bond->params.arp_interval) {
990 pr_info("%s: MII monitoring cannot be used with ARP monitoring. Disabling ARP monitoring...\n",
991 bond->dev->name);
992 bond->params.arp_interval = 0;
993 if (bond->params.arp_validate) {
994 bond->params.arp_validate =
995 BOND_ARP_VALIDATE_NONE;
996 }
997 if (delayed_work_pending(&bond->arp_work)) {
998 cancel_delayed_work(&bond->arp_work);
999 flush_workqueue(bond->wq);
1000 }
1001 }
1002
1003 if (bond->dev->flags & IFF_UP) {
1004 /* If the interface is up, we may need to fire off
1005 * the MII timer. If the interface is down, the
1006 * timer will get fired off when the open function
1007 * is called.
1008 */
1009 if (!delayed_work_pending(&bond->mii_work)) {
1010 INIT_DELAYED_WORK(&bond->mii_work,
1011 bond_mii_monitor);
1012 queue_delayed_work(bond->wq,
1013 &bond->mii_work, 0);
1014 }
1015 }
1016 }
1017 out:
1018 return ret;
1019 }
1020 static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR,
1021 bonding_show_miimon, bonding_store_miimon);
1022
1023 /*
1024 * Show and set the primary slave. The store function is much
1025 * simpler than bonding_store_slaves function because it only needs to
1026 * handle one interface name.
1027 * The bond must be a mode that supports a primary for this be
1028 * set.
1029 */
1030 static ssize_t bonding_show_primary(struct device *d,
1031 struct device_attribute *attr,
1032 char *buf)
1033 {
1034 int count = 0;
1035 struct bonding *bond = to_bond(d);
1036
1037 if (bond->primary_slave)
1038 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);
1039
1040 return count;
1041 }
1042
1043 static ssize_t bonding_store_primary(struct device *d,
1044 struct device_attribute *attr,
1045 const char *buf, size_t count)
1046 {
1047 int i;
1048 struct slave *slave;
1049 struct bonding *bond = to_bond(d);
1050 char ifname[IFNAMSIZ];
1051
1052 if (!rtnl_trylock())
1053 return restart_syscall();
1054 block_netpoll_tx();
1055 read_lock(&bond->lock);
1056 write_lock_bh(&bond->curr_slave_lock);
1057
1058 if (!USES_PRIMARY(bond->params.mode)) {
1059 pr_info("%s: Unable to set primary slave; %s is in mode %d\n",
1060 bond->dev->name, bond->dev->name, bond->params.mode);
1061 goto out;
1062 }
1063
1064 sscanf(buf, "%16s", ifname); /* IFNAMSIZ */
1065
1066 /* check to see if we are clearing primary */
1067 if (!strlen(ifname) || buf[0] == '\n') {
1068 pr_info("%s: Setting primary slave to None.\n",
1069 bond->dev->name);
1070 bond->primary_slave = NULL;
1071 bond_select_active_slave(bond);
1072 goto out;
1073 }
1074
1075 bond_for_each_slave(bond, slave, i) {
1076 if (strncmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
1077 pr_info("%s: Setting %s as primary slave.\n",
1078 bond->dev->name, slave->dev->name);
1079 bond->primary_slave = slave;
1080 strcpy(bond->params.primary, slave->dev->name);
1081 bond_select_active_slave(bond);
1082 goto out;
1083 }
1084 }
1085
1086 pr_info("%s: Unable to set %.*s as primary slave.\n",
1087 bond->dev->name, (int)strlen(buf) - 1, buf);
1088 out:
1089 write_unlock_bh(&bond->curr_slave_lock);
1090 read_unlock(&bond->lock);
1091 unblock_netpoll_tx();
1092 rtnl_unlock();
1093
1094 return count;
1095 }
1096 static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR,
1097 bonding_show_primary, bonding_store_primary);
1098
1099 /*
1100 * Show and set the primary_reselect flag.
1101 */
1102 static ssize_t bonding_show_primary_reselect(struct device *d,
1103 struct device_attribute *attr,
1104 char *buf)
1105 {
1106 struct bonding *bond = to_bond(d);
1107
1108 return sprintf(buf, "%s %d\n",
1109 pri_reselect_tbl[bond->params.primary_reselect].modename,
1110 bond->params.primary_reselect);
1111 }
1112
1113 static ssize_t bonding_store_primary_reselect(struct device *d,
1114 struct device_attribute *attr,
1115 const char *buf, size_t count)
1116 {
1117 int new_value, ret = count;
1118 struct bonding *bond = to_bond(d);
1119
1120 if (!rtnl_trylock())
1121 return restart_syscall();
1122
1123 new_value = bond_parse_parm(buf, pri_reselect_tbl);
1124 if (new_value < 0) {
1125 pr_err("%s: Ignoring invalid primary_reselect value %.*s.\n",
1126 bond->dev->name,
1127 (int) strlen(buf) - 1, buf);
1128 ret = -EINVAL;
1129 goto out;
1130 }
1131
1132 bond->params.primary_reselect = new_value;
1133 pr_info("%s: setting primary_reselect to %s (%d).\n",
1134 bond->dev->name, pri_reselect_tbl[new_value].modename,
1135 new_value);
1136
1137 block_netpoll_tx();
1138 read_lock(&bond->lock);
1139 write_lock_bh(&bond->curr_slave_lock);
1140 bond_select_active_slave(bond);
1141 write_unlock_bh(&bond->curr_slave_lock);
1142 read_unlock(&bond->lock);
1143 unblock_netpoll_tx();
1144 out:
1145 rtnl_unlock();
1146 return ret;
1147 }
1148 static DEVICE_ATTR(primary_reselect, S_IRUGO | S_IWUSR,
1149 bonding_show_primary_reselect,
1150 bonding_store_primary_reselect);
1151
1152 /*
1153 * Show and set the use_carrier flag.
1154 */
1155 static ssize_t bonding_show_carrier(struct device *d,
1156 struct device_attribute *attr,
1157 char *buf)
1158 {
1159 struct bonding *bond = to_bond(d);
1160
1161 return sprintf(buf, "%d\n", bond->params.use_carrier);
1162 }
1163
1164 static ssize_t bonding_store_carrier(struct device *d,
1165 struct device_attribute *attr,
1166 const char *buf, size_t count)
1167 {
1168 int new_value, ret = count;
1169 struct bonding *bond = to_bond(d);
1170
1171
1172 if (sscanf(buf, "%d", &new_value) != 1) {
1173 pr_err("%s: no use_carrier value specified.\n",
1174 bond->dev->name);
1175 ret = -EINVAL;
1176 goto out;
1177 }
1178 if ((new_value == 0) || (new_value == 1)) {
1179 bond->params.use_carrier = new_value;
1180 pr_info("%s: Setting use_carrier to %d.\n",
1181 bond->dev->name, new_value);
1182 } else {
1183 pr_info("%s: Ignoring invalid use_carrier value %d.\n",
1184 bond->dev->name, new_value);
1185 }
1186 out:
1187 return ret;
1188 }
1189 static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR,
1190 bonding_show_carrier, bonding_store_carrier);
1191
1192
1193 /*
1194 * Show and set currently active_slave.
1195 */
1196 static ssize_t bonding_show_active_slave(struct device *d,
1197 struct device_attribute *attr,
1198 char *buf)
1199 {
1200 struct slave *curr;
1201 struct bonding *bond = to_bond(d);
1202 int count = 0;
1203
1204 read_lock(&bond->curr_slave_lock);
1205 curr = bond->curr_active_slave;
1206 read_unlock(&bond->curr_slave_lock);
1207
1208 if (USES_PRIMARY(bond->params.mode) && curr)
1209 count = sprintf(buf, "%s\n", curr->dev->name);
1210 return count;
1211 }
1212
1213 static ssize_t bonding_store_active_slave(struct device *d,
1214 struct device_attribute *attr,
1215 const char *buf, size_t count)
1216 {
1217 int i;
1218 struct slave *slave;
1219 struct slave *old_active = NULL;
1220 struct slave *new_active = NULL;
1221 struct bonding *bond = to_bond(d);
1222 char ifname[IFNAMSIZ];
1223
1224 if (!rtnl_trylock())
1225 return restart_syscall();
1226
1227 block_netpoll_tx();
1228 read_lock(&bond->lock);
1229 write_lock_bh(&bond->curr_slave_lock);
1230
1231 if (!USES_PRIMARY(bond->params.mode)) {
1232 pr_info("%s: Unable to change active slave; %s is in mode %d\n",
1233 bond->dev->name, bond->dev->name, bond->params.mode);
1234 goto out;
1235 }
1236
1237 sscanf(buf, "%16s", ifname); /* IFNAMSIZ */
1238
1239 /* check to see if we are clearing active */
1240 if (!strlen(ifname) || buf[0] == '\n') {
1241 pr_info("%s: Clearing current active slave.\n",
1242 bond->dev->name);
1243 bond->curr_active_slave = NULL;
1244 bond_select_active_slave(bond);
1245 goto out;
1246 }
1247
1248 bond_for_each_slave(bond, slave, i) {
1249 if (strncmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
1250 old_active = bond->curr_active_slave;
1251 new_active = slave;
1252 if (new_active == old_active) {
1253 /* do nothing */
1254 pr_info("%s: %s is already the current"
1255 " active slave.\n",
1256 bond->dev->name,
1257 slave->dev->name);
1258 goto out;
1259 }
1260 else {
1261 if ((new_active) &&
1262 (old_active) &&
1263 (new_active->link == BOND_LINK_UP) &&
1264 IS_UP(new_active->dev)) {
1265 pr_info("%s: Setting %s as active"
1266 " slave.\n",
1267 bond->dev->name,
1268 slave->dev->name);
1269 bond_change_active_slave(bond,
1270 new_active);
1271 }
1272 else {
1273 pr_info("%s: Could not set %s as"
1274 " active slave; either %s is"
1275 " down or the link is down.\n",
1276 bond->dev->name,
1277 slave->dev->name,
1278 slave->dev->name);
1279 }
1280 goto out;
1281 }
1282 }
1283 }
1284
1285 pr_info("%s: Unable to set %.*s as active slave.\n",
1286 bond->dev->name, (int)strlen(buf) - 1, buf);
1287 out:
1288 write_unlock_bh(&bond->curr_slave_lock);
1289 read_unlock(&bond->lock);
1290 unblock_netpoll_tx();
1291
1292 rtnl_unlock();
1293
1294 return count;
1295
1296 }
1297 static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR,
1298 bonding_show_active_slave, bonding_store_active_slave);
1299
1300
1301 /*
1302 * Show link status of the bond interface.
1303 */
1304 static ssize_t bonding_show_mii_status(struct device *d,
1305 struct device_attribute *attr,
1306 char *buf)
1307 {
1308 struct slave *curr;
1309 struct bonding *bond = to_bond(d);
1310
1311 read_lock(&bond->curr_slave_lock);
1312 curr = bond->curr_active_slave;
1313 read_unlock(&bond->curr_slave_lock);
1314
1315 return sprintf(buf, "%s\n", curr ? "up" : "down");
1316 }
1317 static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1318
1319
1320 /*
1321 * Show current 802.3ad aggregator ID.
1322 */
1323 static ssize_t bonding_show_ad_aggregator(struct device *d,
1324 struct device_attribute *attr,
1325 char *buf)
1326 {
1327 int count = 0;
1328 struct bonding *bond = to_bond(d);
1329
1330 if (bond->params.mode == BOND_MODE_8023AD) {
1331 struct ad_info ad_info;
1332 count = sprintf(buf, "%d\n",
1333 (bond_3ad_get_active_agg_info(bond, &ad_info))
1334 ? 0 : ad_info.aggregator_id);
1335 }
1336
1337 return count;
1338 }
1339 static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1340
1341
1342 /*
1343 * Show number of active 802.3ad ports.
1344 */
1345 static ssize_t bonding_show_ad_num_ports(struct device *d,
1346 struct device_attribute *attr,
1347 char *buf)
1348 {
1349 int count = 0;
1350 struct bonding *bond = to_bond(d);
1351
1352 if (bond->params.mode == BOND_MODE_8023AD) {
1353 struct ad_info ad_info;
1354 count = sprintf(buf, "%d\n",
1355 (bond_3ad_get_active_agg_info(bond, &ad_info))
1356 ? 0 : ad_info.ports);
1357 }
1358
1359 return count;
1360 }
1361 static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1362
1363
1364 /*
1365 * Show current 802.3ad actor key.
1366 */
1367 static ssize_t bonding_show_ad_actor_key(struct device *d,
1368 struct device_attribute *attr,
1369 char *buf)
1370 {
1371 int count = 0;
1372 struct bonding *bond = to_bond(d);
1373
1374 if (bond->params.mode == BOND_MODE_8023AD) {
1375 struct ad_info ad_info;
1376 count = sprintf(buf, "%d\n",
1377 (bond_3ad_get_active_agg_info(bond, &ad_info))
1378 ? 0 : ad_info.actor_key);
1379 }
1380
1381 return count;
1382 }
1383 static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1384
1385
1386 /*
1387 * Show current 802.3ad partner key.
1388 */
1389 static ssize_t bonding_show_ad_partner_key(struct device *d,
1390 struct device_attribute *attr,
1391 char *buf)
1392 {
1393 int count = 0;
1394 struct bonding *bond = to_bond(d);
1395
1396 if (bond->params.mode == BOND_MODE_8023AD) {
1397 struct ad_info ad_info;
1398 count = sprintf(buf, "%d\n",
1399 (bond_3ad_get_active_agg_info(bond, &ad_info))
1400 ? 0 : ad_info.partner_key);
1401 }
1402
1403 return count;
1404 }
1405 static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1406
1407
1408 /*
1409 * Show current 802.3ad partner mac.
1410 */
1411 static ssize_t bonding_show_ad_partner_mac(struct device *d,
1412 struct device_attribute *attr,
1413 char *buf)
1414 {
1415 int count = 0;
1416 struct bonding *bond = to_bond(d);
1417
1418 if (bond->params.mode == BOND_MODE_8023AD) {
1419 struct ad_info ad_info;
1420 if (!bond_3ad_get_active_agg_info(bond, &ad_info))
1421 count = sprintf(buf, "%pM\n", ad_info.partner_system);
1422 }
1423
1424 return count;
1425 }
1426 static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1427
1428 /*
1429 * Show the queue_ids of the slaves in the current bond.
1430 */
1431 static ssize_t bonding_show_queue_id(struct device *d,
1432 struct device_attribute *attr,
1433 char *buf)
1434 {
1435 struct slave *slave;
1436 int i, res = 0;
1437 struct bonding *bond = to_bond(d);
1438
1439 if (!rtnl_trylock())
1440 return restart_syscall();
1441
1442 read_lock(&bond->lock);
1443 bond_for_each_slave(bond, slave, i) {
1444 if (res > (PAGE_SIZE - IFNAMSIZ - 6)) {
1445 /* not enough space for another interface_name:queue_id pair */
1446 if ((PAGE_SIZE - res) > 10)
1447 res = PAGE_SIZE - 10;
1448 res += sprintf(buf + res, "++more++ ");
1449 break;
1450 }
1451 res += sprintf(buf + res, "%s:%d ",
1452 slave->dev->name, slave->queue_id);
1453 }
1454 read_unlock(&bond->lock);
1455 if (res)
1456 buf[res-1] = '\n'; /* eat the leftover space */
1457 rtnl_unlock();
1458 return res;
1459 }
1460
1461 /*
1462 * Set the queue_ids of the slaves in the current bond. The bond
1463 * interface must be enslaved for this to work.
1464 */
1465 static ssize_t bonding_store_queue_id(struct device *d,
1466 struct device_attribute *attr,
1467 const char *buffer, size_t count)
1468 {
1469 struct slave *slave, *update_slave;
1470 struct bonding *bond = to_bond(d);
1471 u16 qid;
1472 int i, ret = count;
1473 char *delim;
1474 struct net_device *sdev = NULL;
1475
1476 if (!rtnl_trylock())
1477 return restart_syscall();
1478
1479 /* delim will point to queue id if successful */
1480 delim = strchr(buffer, ':');
1481 if (!delim)
1482 goto err_no_cmd;
1483
1484 /*
1485 * Terminate string that points to device name and bump it
1486 * up one, so we can read the queue id there.
1487 */
1488 *delim = '\0';
1489 if (sscanf(++delim, "%hd\n", &qid) != 1)
1490 goto err_no_cmd;
1491
1492 /* Check buffer length, valid ifname and queue id */
1493 if (strlen(buffer) > IFNAMSIZ ||
1494 !dev_valid_name(buffer) ||
1495 qid > bond->params.tx_queues)
1496 goto err_no_cmd;
1497
1498 /* Get the pointer to that interface if it exists */
1499 sdev = __dev_get_by_name(dev_net(bond->dev), buffer);
1500 if (!sdev)
1501 goto err_no_cmd;
1502
1503 read_lock(&bond->lock);
1504
1505 /* Search for thes slave and check for duplicate qids */
1506 update_slave = NULL;
1507 bond_for_each_slave(bond, slave, i) {
1508 if (sdev == slave->dev)
1509 /*
1510 * We don't need to check the matching
1511 * slave for dups, since we're overwriting it
1512 */
1513 update_slave = slave;
1514 else if (qid && qid == slave->queue_id) {
1515 goto err_no_cmd_unlock;
1516 }
1517 }
1518
1519 if (!update_slave)
1520 goto err_no_cmd_unlock;
1521
1522 /* Actually set the qids for the slave */
1523 update_slave->queue_id = qid;
1524
1525 read_unlock(&bond->lock);
1526 out:
1527 rtnl_unlock();
1528 return ret;
1529
1530 err_no_cmd_unlock:
1531 read_unlock(&bond->lock);
1532 err_no_cmd:
1533 pr_info("invalid input for queue_id set for %s.\n",
1534 bond->dev->name);
1535 ret = -EPERM;
1536 goto out;
1537 }
1538
1539 static DEVICE_ATTR(queue_id, S_IRUGO | S_IWUSR, bonding_show_queue_id,
1540 bonding_store_queue_id);
1541
1542
1543 /*
1544 * Show and set the all_slaves_active flag.
1545 */
1546 static ssize_t bonding_show_slaves_active(struct device *d,
1547 struct device_attribute *attr,
1548 char *buf)
1549 {
1550 struct bonding *bond = to_bond(d);
1551
1552 return sprintf(buf, "%d\n", bond->params.all_slaves_active);
1553 }
1554
1555 static ssize_t bonding_store_slaves_active(struct device *d,
1556 struct device_attribute *attr,
1557 const char *buf, size_t count)
1558 {
1559 int i, new_value, ret = count;
1560 struct bonding *bond = to_bond(d);
1561 struct slave *slave;
1562
1563 if (sscanf(buf, "%d", &new_value) != 1) {
1564 pr_err("%s: no all_slaves_active value specified.\n",
1565 bond->dev->name);
1566 ret = -EINVAL;
1567 goto out;
1568 }
1569
1570 if (new_value == bond->params.all_slaves_active)
1571 goto out;
1572
1573 if ((new_value == 0) || (new_value == 1)) {
1574 bond->params.all_slaves_active = new_value;
1575 } else {
1576 pr_info("%s: Ignoring invalid all_slaves_active value %d.\n",
1577 bond->dev->name, new_value);
1578 ret = -EINVAL;
1579 goto out;
1580 }
1581
1582 bond_for_each_slave(bond, slave, i) {
1583 if (!bond_is_active_slave(slave)) {
1584 if (new_value)
1585 slave->inactive = 0;
1586 else
1587 slave->inactive = 1;
1588 }
1589 }
1590 out:
1591 return ret;
1592 }
1593 static DEVICE_ATTR(all_slaves_active, S_IRUGO | S_IWUSR,
1594 bonding_show_slaves_active, bonding_store_slaves_active);
1595
1596 /*
1597 * Show and set the number of IGMP membership reports to send on link failure
1598 */
1599 static ssize_t bonding_show_resend_igmp(struct device *d,
1600 struct device_attribute *attr,
1601 char *buf)
1602 {
1603 struct bonding *bond = to_bond(d);
1604
1605 return sprintf(buf, "%d\n", bond->params.resend_igmp);
1606 }
1607
1608 static ssize_t bonding_store_resend_igmp(struct device *d,
1609 struct device_attribute *attr,
1610 const char *buf, size_t count)
1611 {
1612 int new_value, ret = count;
1613 struct bonding *bond = to_bond(d);
1614
1615 if (sscanf(buf, "%d", &new_value) != 1) {
1616 pr_err("%s: no resend_igmp value specified.\n",
1617 bond->dev->name);
1618 ret = -EINVAL;
1619 goto out;
1620 }
1621
1622 if (new_value < 0 || new_value > 255) {
1623 pr_err("%s: Invalid resend_igmp value %d not in range 0-255; rejected.\n",
1624 bond->dev->name, new_value);
1625 ret = -EINVAL;
1626 goto out;
1627 }
1628
1629 pr_info("%s: Setting resend_igmp to %d.\n",
1630 bond->dev->name, new_value);
1631 bond->params.resend_igmp = new_value;
1632 out:
1633 return ret;
1634 }
1635
1636 static DEVICE_ATTR(resend_igmp, S_IRUGO | S_IWUSR,
1637 bonding_show_resend_igmp, bonding_store_resend_igmp);
1638
1639 static struct attribute *per_bond_attrs[] = {
1640 &dev_attr_slaves.attr,
1641 &dev_attr_mode.attr,
1642 &dev_attr_fail_over_mac.attr,
1643 &dev_attr_arp_validate.attr,
1644 &dev_attr_arp_interval.attr,
1645 &dev_attr_arp_ip_target.attr,
1646 &dev_attr_downdelay.attr,
1647 &dev_attr_updelay.attr,
1648 &dev_attr_lacp_rate.attr,
1649 &dev_attr_ad_select.attr,
1650 &dev_attr_xmit_hash_policy.attr,
1651 &dev_attr_num_grat_arp.attr,
1652 &dev_attr_num_unsol_na.attr,
1653 &dev_attr_miimon.attr,
1654 &dev_attr_primary.attr,
1655 &dev_attr_primary_reselect.attr,
1656 &dev_attr_use_carrier.attr,
1657 &dev_attr_active_slave.attr,
1658 &dev_attr_mii_status.attr,
1659 &dev_attr_ad_aggregator.attr,
1660 &dev_attr_ad_num_ports.attr,
1661 &dev_attr_ad_actor_key.attr,
1662 &dev_attr_ad_partner_key.attr,
1663 &dev_attr_ad_partner_mac.attr,
1664 &dev_attr_queue_id.attr,
1665 &dev_attr_all_slaves_active.attr,
1666 &dev_attr_resend_igmp.attr,
1667 &dev_attr_min_links.attr,
1668 NULL,
1669 };
1670
1671 static struct attribute_group bonding_group = {
1672 .name = "bonding",
1673 .attrs = per_bond_attrs,
1674 };
1675
1676 /*
1677 * Initialize sysfs. This sets up the bonding_masters file in
1678 * /sys/class/net.
1679 */
1680 int bond_create_sysfs(struct bond_net *bn)
1681 {
1682 int ret;
1683
1684 bn->class_attr_bonding_masters = class_attr_bonding_masters;
1685 sysfs_attr_init(&bn->class_attr_bonding_masters.attr);
1686
1687 ret = netdev_class_create_file(&bn->class_attr_bonding_masters);
1688 /*
1689 * Permit multiple loads of the module by ignoring failures to
1690 * create the bonding_masters sysfs file. Bonding devices
1691 * created by second or subsequent loads of the module will
1692 * not be listed in, or controllable by, bonding_masters, but
1693 * will have the usual "bonding" sysfs directory.
1694 *
1695 * This is done to preserve backwards compatibility for
1696 * initscripts/sysconfig, which load bonding multiple times to
1697 * configure multiple bonding devices.
1698 */
1699 if (ret == -EEXIST) {
1700 /* Is someone being kinky and naming a device bonding_master? */
1701 if (__dev_get_by_name(bn->net,
1702 class_attr_bonding_masters.attr.name))
1703 pr_err("network device named %s already exists in sysfs",
1704 class_attr_bonding_masters.attr.name);
1705 ret = 0;
1706 }
1707
1708 return ret;
1709
1710 }
1711
1712 /*
1713 * Remove /sys/class/net/bonding_masters.
1714 */
1715 void bond_destroy_sysfs(struct bond_net *bn)
1716 {
1717 netdev_class_remove_file(&bn->class_attr_bonding_masters);
1718 }
1719
1720 /*
1721 * Initialize sysfs for each bond. This sets up and registers
1722 * the 'bondctl' directory for each individual bond under /sys/class/net.
1723 */
1724 void bond_prepare_sysfs_group(struct bonding *bond)
1725 {
1726 bond->dev->sysfs_groups[0] = &bonding_group;
1727 }
1728