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Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wirel...
[deliverable/linux.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/fs.h>
30 #include <linux/types.h>
31 #include <linux/string.h>
32 #include <linux/netdevice.h>
33 #include <linux/inetdevice.h>
34 #include <linux/in.h>
35 #include <linux/sysfs.h>
36 #include <linux/ctype.h>
37 #include <linux/inet.h>
38 #include <linux/rtnetlink.h>
39 #include <linux/etherdevice.h>
40 #include <net/net_namespace.h>
41 #include <net/netns/generic.h>
42 #include <linux/nsproxy.h>
43
44 #include "bonding.h"
45
46 #define to_dev(obj) container_of(obj, struct device, kobj)
47 #define to_bond(cd) ((struct bonding *)(netdev_priv(to_net_dev(cd))))
48
49 /*
50 * "show" function for the bond_masters attribute.
51 * The class parameter is ignored.
52 */
53 static ssize_t bonding_show_bonds(struct class *cls,
54 struct class_attribute *attr,
55 char *buf)
56 {
57 struct bond_net *bn =
58 container_of(attr, struct bond_net, class_attr_bonding_masters);
59 int res = 0;
60 struct bonding *bond;
61
62 rtnl_lock();
63
64 list_for_each_entry(bond, &bn->dev_list, bond_list) {
65 if (res > (PAGE_SIZE - IFNAMSIZ)) {
66 /* not enough space for another interface name */
67 if ((PAGE_SIZE - res) > 10)
68 res = PAGE_SIZE - 10;
69 res += sprintf(buf + res, "++more++ ");
70 break;
71 }
72 res += sprintf(buf + res, "%s ", bond->dev->name);
73 }
74 if (res)
75 buf[res-1] = '\n'; /* eat the leftover space */
76
77 rtnl_unlock();
78 return res;
79 }
80
81 static struct net_device *bond_get_by_name(struct bond_net *bn, const char *ifname)
82 {
83 struct bonding *bond;
84
85 list_for_each_entry(bond, &bn->dev_list, bond_list) {
86 if (strncmp(bond->dev->name, ifname, IFNAMSIZ) == 0)
87 return bond->dev;
88 }
89 return NULL;
90 }
91
92 /*
93 * "store" function for the bond_masters attribute. This is what
94 * creates and deletes entire bonds.
95 *
96 * The class parameter is ignored.
97 *
98 */
99
100 static ssize_t bonding_store_bonds(struct class *cls,
101 struct class_attribute *attr,
102 const char *buffer, size_t count)
103 {
104 struct bond_net *bn =
105 container_of(attr, struct bond_net, class_attr_bonding_masters);
106 char command[IFNAMSIZ + 1] = {0, };
107 char *ifname;
108 int rv, res = count;
109
110 sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
111 ifname = command + 1;
112 if ((strlen(command) <= 1) ||
113 !dev_valid_name(ifname))
114 goto err_no_cmd;
115
116 if (command[0] == '+') {
117 pr_info("%s is being created...\n", ifname);
118 rv = bond_create(bn->net, ifname);
119 if (rv) {
120 if (rv == -EEXIST)
121 pr_info("%s already exists.\n", ifname);
122 else
123 pr_info("%s creation failed.\n", ifname);
124 res = rv;
125 }
126 } else if (command[0] == '-') {
127 struct net_device *bond_dev;
128
129 rtnl_lock();
130 bond_dev = bond_get_by_name(bn, ifname);
131 if (bond_dev) {
132 pr_info("%s is being deleted...\n", ifname);
133 unregister_netdevice(bond_dev);
134 } else {
135 pr_err("unable to delete non-existent %s\n", ifname);
136 res = -ENODEV;
137 }
138 rtnl_unlock();
139 } else
140 goto err_no_cmd;
141
142 /* Always return either count or an error. If you return 0, you'll
143 * get called forever, which is bad.
144 */
145 return res;
146
147 err_no_cmd:
148 pr_err("no command found in bonding_masters. Use +ifname or -ifname.\n");
149 return -EPERM;
150 }
151
152 static const void *bonding_namespace(struct class *cls,
153 const struct class_attribute *attr)
154 {
155 const struct bond_net *bn =
156 container_of(attr, struct bond_net, class_attr_bonding_masters);
157 return bn->net;
158 }
159
160 /* class attribute for bond_masters file. This ends up in /sys/class/net */
161 static const struct class_attribute class_attr_bonding_masters = {
162 .attr = {
163 .name = "bonding_masters",
164 .mode = S_IWUSR | S_IRUGO,
165 },
166 .show = bonding_show_bonds,
167 .store = bonding_store_bonds,
168 .namespace = bonding_namespace,
169 };
170
171 int bond_create_slave_symlinks(struct net_device *master,
172 struct net_device *slave)
173 {
174 char linkname[IFNAMSIZ+7];
175 int ret = 0;
176
177 /* first, create a link from the slave back to the master */
178 ret = sysfs_create_link(&(slave->dev.kobj), &(master->dev.kobj),
179 "master");
180 if (ret)
181 return ret;
182 /* next, create a link from the master to the slave */
183 sprintf(linkname, "slave_%s", slave->name);
184 ret = sysfs_create_link(&(master->dev.kobj), &(slave->dev.kobj),
185 linkname);
186
187 /* free the master link created earlier in case of error */
188 if (ret)
189 sysfs_remove_link(&(slave->dev.kobj), "master");
190
191 return ret;
192
193 }
194
195 void bond_destroy_slave_symlinks(struct net_device *master,
196 struct net_device *slave)
197 {
198 char linkname[IFNAMSIZ+7];
199
200 sysfs_remove_link(&(slave->dev.kobj), "master");
201 sprintf(linkname, "slave_%s", slave->name);
202 sysfs_remove_link(&(master->dev.kobj), linkname);
203 }
204
205
206 /*
207 * Show the slaves in the current bond.
208 */
209 static ssize_t bonding_show_slaves(struct device *d,
210 struct device_attribute *attr, char *buf)
211 {
212 struct bonding *bond = to_bond(d);
213 struct slave *slave;
214 int res = 0;
215
216 read_lock(&bond->lock);
217 bond_for_each_slave(bond, slave) {
218 if (res > (PAGE_SIZE - IFNAMSIZ)) {
219 /* not enough space for another interface name */
220 if ((PAGE_SIZE - res) > 10)
221 res = PAGE_SIZE - 10;
222 res += sprintf(buf + res, "++more++ ");
223 break;
224 }
225 res += sprintf(buf + res, "%s ", slave->dev->name);
226 }
227 read_unlock(&bond->lock);
228 if (res)
229 buf[res-1] = '\n'; /* eat the leftover space */
230
231 return res;
232 }
233
234 /*
235 * Set the slaves in the current bond.
236 * This is supposed to be only thin wrapper for bond_enslave and bond_release.
237 * All hard work should be done there.
238 */
239 static ssize_t bonding_store_slaves(struct device *d,
240 struct device_attribute *attr,
241 const char *buffer, size_t count)
242 {
243 char command[IFNAMSIZ + 1] = { 0, };
244 char *ifname;
245 int res, ret = count;
246 struct net_device *dev;
247 struct bonding *bond = to_bond(d);
248
249 if (!rtnl_trylock())
250 return restart_syscall();
251
252 sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
253 ifname = command + 1;
254 if ((strlen(command) <= 1) ||
255 !dev_valid_name(ifname))
256 goto err_no_cmd;
257
258 dev = __dev_get_by_name(dev_net(bond->dev), ifname);
259 if (!dev) {
260 pr_info("%s: Interface %s does not exist!\n",
261 bond->dev->name, ifname);
262 ret = -ENODEV;
263 goto out;
264 }
265
266 switch (command[0]) {
267 case '+':
268 pr_info("%s: Adding slave %s.\n", bond->dev->name, dev->name);
269 res = bond_enslave(bond->dev, dev);
270 break;
271
272 case '-':
273 pr_info("%s: Removing slave %s.\n", bond->dev->name, dev->name);
274 res = bond_release(bond->dev, dev);
275 break;
276
277 default:
278 goto err_no_cmd;
279 }
280
281 if (res)
282 ret = res;
283 goto out;
284
285 err_no_cmd:
286 pr_err("no command found in slaves file for bond %s. Use +ifname or -ifname.\n",
287 bond->dev->name);
288 ret = -EPERM;
289
290 out:
291 rtnl_unlock();
292 return ret;
293 }
294
295 static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves,
296 bonding_store_slaves);
297
298 /*
299 * Show and set the bonding mode. The bond interface must be down to
300 * change the mode.
301 */
302 static ssize_t bonding_show_mode(struct device *d,
303 struct device_attribute *attr, char *buf)
304 {
305 struct bonding *bond = to_bond(d);
306
307 return sprintf(buf, "%s %d\n",
308 bond_mode_tbl[bond->params.mode].modename,
309 bond->params.mode);
310 }
311
312 static ssize_t bonding_store_mode(struct device *d,
313 struct device_attribute *attr,
314 const char *buf, size_t count)
315 {
316 int new_value, ret = count;
317 struct bonding *bond = to_bond(d);
318
319 if (!rtnl_trylock())
320 return restart_syscall();
321
322 if (bond->dev->flags & IFF_UP) {
323 pr_err("unable to update mode of %s because interface is up.\n",
324 bond->dev->name);
325 ret = -EPERM;
326 goto out;
327 }
328
329 if (!list_empty(&bond->slave_list)) {
330 pr_err("unable to update mode of %s because it has slaves.\n",
331 bond->dev->name);
332 ret = -EPERM;
333 goto out;
334 }
335
336 new_value = bond_parse_parm(buf, bond_mode_tbl);
337 if (new_value < 0) {
338 pr_err("%s: Ignoring invalid mode value %.*s.\n",
339 bond->dev->name, (int)strlen(buf) - 1, buf);
340 ret = -EINVAL;
341 goto out;
342 }
343 if ((new_value == BOND_MODE_ALB ||
344 new_value == BOND_MODE_TLB) &&
345 bond->params.arp_interval) {
346 pr_err("%s: %s mode is incompatible with arp monitoring.\n",
347 bond->dev->name, bond_mode_tbl[new_value].modename);
348 ret = -EINVAL;
349 goto out;
350 }
351
352 bond->params.mode = new_value;
353 bond_set_mode_ops(bond, bond->params.mode);
354 pr_info("%s: setting mode to %s (%d).\n",
355 bond->dev->name, bond_mode_tbl[new_value].modename,
356 new_value);
357 out:
358 rtnl_unlock();
359 return ret;
360 }
361 static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,
362 bonding_show_mode, bonding_store_mode);
363
364 /*
365 * Show and set the bonding transmit hash method.
366 */
367 static ssize_t bonding_show_xmit_hash(struct device *d,
368 struct device_attribute *attr,
369 char *buf)
370 {
371 struct bonding *bond = to_bond(d);
372
373 return sprintf(buf, "%s %d\n",
374 xmit_hashtype_tbl[bond->params.xmit_policy].modename,
375 bond->params.xmit_policy);
376 }
377
378 static ssize_t bonding_store_xmit_hash(struct device *d,
379 struct device_attribute *attr,
380 const char *buf, size_t count)
381 {
382 int new_value, ret = count;
383 struct bonding *bond = to_bond(d);
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 } else {
392 bond->params.xmit_policy = new_value;
393 bond_set_mode_ops(bond, bond->params.mode);
394 pr_info("%s: setting xmit hash policy to %s (%d).\n",
395 bond->dev->name,
396 xmit_hashtype_tbl[new_value].modename, new_value);
397 }
398
399 return ret;
400 }
401 static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR,
402 bonding_show_xmit_hash, bonding_store_xmit_hash);
403
404 /*
405 * Show and set arp_validate.
406 */
407 static ssize_t bonding_show_arp_validate(struct device *d,
408 struct device_attribute *attr,
409 char *buf)
410 {
411 struct bonding *bond = to_bond(d);
412
413 return sprintf(buf, "%s %d\n",
414 arp_validate_tbl[bond->params.arp_validate].modename,
415 bond->params.arp_validate);
416 }
417
418 static ssize_t bonding_store_arp_validate(struct device *d,
419 struct device_attribute *attr,
420 const char *buf, size_t count)
421 {
422 int new_value;
423 struct bonding *bond = to_bond(d);
424
425 new_value = bond_parse_parm(buf, arp_validate_tbl);
426 if (new_value < 0) {
427 pr_err("%s: Ignoring invalid arp_validate value %s\n",
428 bond->dev->name, buf);
429 return -EINVAL;
430 }
431 if (new_value && (bond->params.mode != BOND_MODE_ACTIVEBACKUP)) {
432 pr_err("%s: arp_validate only supported in active-backup mode.\n",
433 bond->dev->name);
434 return -EINVAL;
435 }
436 pr_info("%s: setting arp_validate to %s (%d).\n",
437 bond->dev->name, arp_validate_tbl[new_value].modename,
438 new_value);
439
440 bond->params.arp_validate = new_value;
441
442 return count;
443 }
444
445 static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate,
446 bonding_store_arp_validate);
447 /*
448 * Show and set arp_all_targets.
449 */
450 static ssize_t bonding_show_arp_all_targets(struct device *d,
451 struct device_attribute *attr,
452 char *buf)
453 {
454 struct bonding *bond = to_bond(d);
455 int value = bond->params.arp_all_targets;
456
457 return sprintf(buf, "%s %d\n", arp_all_targets_tbl[value].modename,
458 value);
459 }
460
461 static ssize_t bonding_store_arp_all_targets(struct device *d,
462 struct device_attribute *attr,
463 const char *buf, size_t count)
464 {
465 struct bonding *bond = to_bond(d);
466 int new_value;
467
468 new_value = bond_parse_parm(buf, arp_all_targets_tbl);
469 if (new_value < 0) {
470 pr_err("%s: Ignoring invalid arp_all_targets value %s\n",
471 bond->dev->name, buf);
472 return -EINVAL;
473 }
474 pr_info("%s: setting arp_all_targets to %s (%d).\n",
475 bond->dev->name, arp_all_targets_tbl[new_value].modename,
476 new_value);
477
478 bond->params.arp_all_targets = new_value;
479
480 return count;
481 }
482
483 static DEVICE_ATTR(arp_all_targets, S_IRUGO | S_IWUSR,
484 bonding_show_arp_all_targets, bonding_store_arp_all_targets);
485
486 /*
487 * Show and store fail_over_mac. User only allowed to change the
488 * value when there are no slaves.
489 */
490 static ssize_t bonding_show_fail_over_mac(struct device *d,
491 struct device_attribute *attr,
492 char *buf)
493 {
494 struct bonding *bond = to_bond(d);
495
496 return sprintf(buf, "%s %d\n",
497 fail_over_mac_tbl[bond->params.fail_over_mac].modename,
498 bond->params.fail_over_mac);
499 }
500
501 static ssize_t bonding_store_fail_over_mac(struct device *d,
502 struct device_attribute *attr,
503 const char *buf, size_t count)
504 {
505 int new_value, ret = count;
506 struct bonding *bond = to_bond(d);
507
508 if (!rtnl_trylock())
509 return restart_syscall();
510
511 if (!list_empty(&bond->slave_list)) {
512 pr_err("%s: Can't alter fail_over_mac with slaves in bond.\n",
513 bond->dev->name);
514 ret = -EPERM;
515 goto out;
516 }
517
518 new_value = bond_parse_parm(buf, fail_over_mac_tbl);
519 if (new_value < 0) {
520 pr_err("%s: Ignoring invalid fail_over_mac value %s.\n",
521 bond->dev->name, buf);
522 ret = -EINVAL;
523 goto out;
524 }
525
526 bond->params.fail_over_mac = new_value;
527 pr_info("%s: Setting fail_over_mac to %s (%d).\n",
528 bond->dev->name, fail_over_mac_tbl[new_value].modename,
529 new_value);
530
531 out:
532 rtnl_unlock();
533 return ret;
534 }
535
536 static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR,
537 bonding_show_fail_over_mac, bonding_store_fail_over_mac);
538
539 /*
540 * Show and set the arp timer interval. There are two tricky bits
541 * here. First, if ARP monitoring is activated, then we must disable
542 * MII monitoring. Second, if the ARP timer isn't running, we must
543 * start it.
544 */
545 static ssize_t bonding_show_arp_interval(struct device *d,
546 struct device_attribute *attr,
547 char *buf)
548 {
549 struct bonding *bond = to_bond(d);
550
551 return sprintf(buf, "%d\n", bond->params.arp_interval);
552 }
553
554 static ssize_t bonding_store_arp_interval(struct device *d,
555 struct device_attribute *attr,
556 const char *buf, size_t count)
557 {
558 int new_value, ret = count;
559 struct bonding *bond = to_bond(d);
560
561 if (!rtnl_trylock())
562 return restart_syscall();
563 if (sscanf(buf, "%d", &new_value) != 1) {
564 pr_err("%s: no arp_interval value specified.\n",
565 bond->dev->name);
566 ret = -EINVAL;
567 goto out;
568 }
569 if (new_value < 0) {
570 pr_err("%s: Invalid arp_interval value %d not in range 0-%d; rejected.\n",
571 bond->dev->name, new_value, INT_MAX);
572 ret = -EINVAL;
573 goto out;
574 }
575 if (bond->params.mode == BOND_MODE_ALB ||
576 bond->params.mode == BOND_MODE_TLB) {
577 pr_info("%s: ARP monitoring cannot be used with ALB/TLB. Only MII monitoring is supported on %s.\n",
578 bond->dev->name, bond->dev->name);
579 ret = -EINVAL;
580 goto out;
581 }
582 pr_info("%s: Setting ARP monitoring interval to %d.\n",
583 bond->dev->name, new_value);
584 bond->params.arp_interval = new_value;
585 if (new_value) {
586 if (bond->params.miimon) {
587 pr_info("%s: ARP monitoring cannot be used with MII monitoring. %s Disabling MII monitoring.\n",
588 bond->dev->name, bond->dev->name);
589 bond->params.miimon = 0;
590 }
591 if (!bond->params.arp_targets[0])
592 pr_info("%s: ARP monitoring has been set up, but no ARP targets have been specified.\n",
593 bond->dev->name);
594 }
595 if (bond->dev->flags & IFF_UP) {
596 /* If the interface is up, we may need to fire off
597 * the ARP timer. If the interface is down, the
598 * timer will get fired off when the open function
599 * is called.
600 */
601 if (!new_value) {
602 cancel_delayed_work_sync(&bond->arp_work);
603 } else {
604 cancel_delayed_work_sync(&bond->mii_work);
605 queue_delayed_work(bond->wq, &bond->arp_work, 0);
606 }
607 }
608 out:
609 rtnl_unlock();
610 return ret;
611 }
612 static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR,
613 bonding_show_arp_interval, bonding_store_arp_interval);
614
615 /*
616 * Show and set the arp targets.
617 */
618 static ssize_t bonding_show_arp_targets(struct device *d,
619 struct device_attribute *attr,
620 char *buf)
621 {
622 int i, res = 0;
623 struct bonding *bond = to_bond(d);
624
625 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
626 if (bond->params.arp_targets[i])
627 res += sprintf(buf + res, "%pI4 ",
628 &bond->params.arp_targets[i]);
629 }
630 if (res)
631 buf[res-1] = '\n'; /* eat the leftover space */
632 return res;
633 }
634
635 static ssize_t bonding_store_arp_targets(struct device *d,
636 struct device_attribute *attr,
637 const char *buf, size_t count)
638 {
639 struct bonding *bond = to_bond(d);
640 struct slave *slave;
641 __be32 newtarget, *targets;
642 unsigned long *targets_rx;
643 int ind, i, j, ret = -EINVAL;
644
645 targets = bond->params.arp_targets;
646 newtarget = in_aton(buf + 1);
647 /* look for adds */
648 if (buf[0] == '+') {
649 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
650 pr_err("%s: invalid ARP target %pI4 specified for addition\n",
651 bond->dev->name, &newtarget);
652 goto out;
653 }
654
655 if (bond_get_targets_ip(targets, newtarget) != -1) { /* dup */
656 pr_err("%s: ARP target %pI4 is already present\n",
657 bond->dev->name, &newtarget);
658 goto out;
659 }
660
661 ind = bond_get_targets_ip(targets, 0); /* first free slot */
662 if (ind == -1) {
663 pr_err("%s: ARP target table is full!\n",
664 bond->dev->name);
665 goto out;
666 }
667
668 pr_info("%s: adding ARP target %pI4.\n", bond->dev->name,
669 &newtarget);
670 /* not to race with bond_arp_rcv */
671 write_lock_bh(&bond->lock);
672 bond_for_each_slave(bond, slave)
673 slave->target_last_arp_rx[ind] = jiffies;
674 targets[ind] = newtarget;
675 write_unlock_bh(&bond->lock);
676 } else if (buf[0] == '-') {
677 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
678 pr_err("%s: invalid ARP target %pI4 specified for removal\n",
679 bond->dev->name, &newtarget);
680 goto out;
681 }
682
683 ind = bond_get_targets_ip(targets, newtarget);
684 if (ind == -1) {
685 pr_err("%s: unable to remove nonexistent ARP target %pI4.\n",
686 bond->dev->name, &newtarget);
687 goto out;
688 }
689
690 if (ind == 0 && !targets[1] && bond->params.arp_interval)
691 pr_warn("%s: removing last arp target with arp_interval on\n",
692 bond->dev->name);
693
694 pr_info("%s: removing ARP target %pI4.\n", bond->dev->name,
695 &newtarget);
696
697 write_lock_bh(&bond->lock);
698 bond_for_each_slave(bond, slave) {
699 targets_rx = slave->target_last_arp_rx;
700 j = ind;
701 for (; (j < BOND_MAX_ARP_TARGETS-1) && targets[j+1]; j++)
702 targets_rx[j] = targets_rx[j+1];
703 targets_rx[j] = 0;
704 }
705 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
706 targets[i] = targets[i+1];
707 targets[i] = 0;
708 write_unlock_bh(&bond->lock);
709 } else {
710 pr_err("no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
711 bond->dev->name);
712 ret = -EPERM;
713 goto out;
714 }
715
716 ret = count;
717 out:
718 return ret;
719 }
720 static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
721
722 /*
723 * Show and set the up and down delays. These must be multiples of the
724 * MII monitoring value, and are stored internally as the multiplier.
725 * Thus, we must translate to MS for the real world.
726 */
727 static ssize_t bonding_show_downdelay(struct device *d,
728 struct device_attribute *attr,
729 char *buf)
730 {
731 struct bonding *bond = to_bond(d);
732
733 return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
734 }
735
736 static ssize_t bonding_store_downdelay(struct device *d,
737 struct device_attribute *attr,
738 const char *buf, size_t count)
739 {
740 int new_value, ret = count;
741 struct bonding *bond = to_bond(d);
742
743 if (!(bond->params.miimon)) {
744 pr_err("%s: Unable to set down delay as MII monitoring is disabled\n",
745 bond->dev->name);
746 ret = -EPERM;
747 goto out;
748 }
749
750 if (sscanf(buf, "%d", &new_value) != 1) {
751 pr_err("%s: no down delay value specified.\n", bond->dev->name);
752 ret = -EINVAL;
753 goto out;
754 }
755 if (new_value < 0) {
756 pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n",
757 bond->dev->name, new_value, 0, INT_MAX);
758 ret = -EINVAL;
759 goto out;
760 } else {
761 if ((new_value % bond->params.miimon) != 0) {
762 pr_warning("%s: Warning: down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
763 bond->dev->name, new_value,
764 bond->params.miimon,
765 (new_value / bond->params.miimon) *
766 bond->params.miimon);
767 }
768 bond->params.downdelay = new_value / bond->params.miimon;
769 pr_info("%s: Setting down delay to %d.\n",
770 bond->dev->name,
771 bond->params.downdelay * bond->params.miimon);
772
773 }
774
775 out:
776 return ret;
777 }
778 static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR,
779 bonding_show_downdelay, bonding_store_downdelay);
780
781 static ssize_t bonding_show_updelay(struct device *d,
782 struct device_attribute *attr,
783 char *buf)
784 {
785 struct bonding *bond = to_bond(d);
786
787 return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
788
789 }
790
791 static ssize_t bonding_store_updelay(struct device *d,
792 struct device_attribute *attr,
793 const char *buf, size_t count)
794 {
795 int new_value, ret = count;
796 struct bonding *bond = to_bond(d);
797
798 if (!(bond->params.miimon)) {
799 pr_err("%s: Unable to set up delay as MII monitoring is disabled\n",
800 bond->dev->name);
801 ret = -EPERM;
802 goto out;
803 }
804
805 if (sscanf(buf, "%d", &new_value) != 1) {
806 pr_err("%s: no up delay value specified.\n",
807 bond->dev->name);
808 ret = -EINVAL;
809 goto out;
810 }
811 if (new_value < 0) {
812 pr_err("%s: Invalid up delay value %d not in range %d-%d; rejected.\n",
813 bond->dev->name, new_value, 0, INT_MAX);
814 ret = -EINVAL;
815 goto out;
816 } else {
817 if ((new_value % bond->params.miimon) != 0) {
818 pr_warning("%s: Warning: up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
819 bond->dev->name, new_value,
820 bond->params.miimon,
821 (new_value / bond->params.miimon) *
822 bond->params.miimon);
823 }
824 bond->params.updelay = new_value / bond->params.miimon;
825 pr_info("%s: Setting up delay to %d.\n",
826 bond->dev->name,
827 bond->params.updelay * bond->params.miimon);
828 }
829
830 out:
831 return ret;
832 }
833 static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR,
834 bonding_show_updelay, bonding_store_updelay);
835
836 /*
837 * Show and set the LACP interval. Interface must be down, and the mode
838 * must be set to 802.3ad mode.
839 */
840 static ssize_t bonding_show_lacp(struct device *d,
841 struct device_attribute *attr,
842 char *buf)
843 {
844 struct bonding *bond = to_bond(d);
845
846 return sprintf(buf, "%s %d\n",
847 bond_lacp_tbl[bond->params.lacp_fast].modename,
848 bond->params.lacp_fast);
849 }
850
851 static ssize_t bonding_store_lacp(struct device *d,
852 struct device_attribute *attr,
853 const char *buf, size_t count)
854 {
855 int new_value, ret = count;
856 struct bonding *bond = to_bond(d);
857
858 if (bond->dev->flags & IFF_UP) {
859 pr_err("%s: Unable to update LACP rate because interface is up.\n",
860 bond->dev->name);
861 ret = -EPERM;
862 goto out;
863 }
864
865 if (bond->params.mode != BOND_MODE_8023AD) {
866 pr_err("%s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
867 bond->dev->name);
868 ret = -EPERM;
869 goto out;
870 }
871
872 new_value = bond_parse_parm(buf, bond_lacp_tbl);
873
874 if ((new_value == 1) || (new_value == 0)) {
875 bond->params.lacp_fast = new_value;
876 bond_3ad_update_lacp_rate(bond);
877 pr_info("%s: Setting LACP rate to %s (%d).\n",
878 bond->dev->name, bond_lacp_tbl[new_value].modename,
879 new_value);
880 } else {
881 pr_err("%s: Ignoring invalid LACP rate value %.*s.\n",
882 bond->dev->name, (int)strlen(buf) - 1, buf);
883 ret = -EINVAL;
884 }
885 out:
886 return ret;
887 }
888 static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR,
889 bonding_show_lacp, bonding_store_lacp);
890
891 static ssize_t bonding_show_min_links(struct device *d,
892 struct device_attribute *attr,
893 char *buf)
894 {
895 struct bonding *bond = to_bond(d);
896
897 return sprintf(buf, "%d\n", bond->params.min_links);
898 }
899
900 static ssize_t bonding_store_min_links(struct device *d,
901 struct device_attribute *attr,
902 const char *buf, size_t count)
903 {
904 struct bonding *bond = to_bond(d);
905 int ret;
906 unsigned int new_value;
907
908 ret = kstrtouint(buf, 0, &new_value);
909 if (ret < 0) {
910 pr_err("%s: Ignoring invalid min links value %s.\n",
911 bond->dev->name, buf);
912 return ret;
913 }
914
915 pr_info("%s: Setting min links value to %u\n",
916 bond->dev->name, new_value);
917 bond->params.min_links = new_value;
918 return count;
919 }
920 static DEVICE_ATTR(min_links, S_IRUGO | S_IWUSR,
921 bonding_show_min_links, bonding_store_min_links);
922
923 static ssize_t bonding_show_ad_select(struct device *d,
924 struct device_attribute *attr,
925 char *buf)
926 {
927 struct bonding *bond = to_bond(d);
928
929 return sprintf(buf, "%s %d\n",
930 ad_select_tbl[bond->params.ad_select].modename,
931 bond->params.ad_select);
932 }
933
934
935 static ssize_t bonding_store_ad_select(struct device *d,
936 struct device_attribute *attr,
937 const char *buf, size_t count)
938 {
939 int new_value, ret = count;
940 struct bonding *bond = to_bond(d);
941
942 if (bond->dev->flags & IFF_UP) {
943 pr_err("%s: Unable to update ad_select because interface is up.\n",
944 bond->dev->name);
945 ret = -EPERM;
946 goto out;
947 }
948
949 new_value = bond_parse_parm(buf, ad_select_tbl);
950
951 if (new_value != -1) {
952 bond->params.ad_select = new_value;
953 pr_info("%s: Setting ad_select to %s (%d).\n",
954 bond->dev->name, ad_select_tbl[new_value].modename,
955 new_value);
956 } else {
957 pr_err("%s: Ignoring invalid ad_select value %.*s.\n",
958 bond->dev->name, (int)strlen(buf) - 1, buf);
959 ret = -EINVAL;
960 }
961 out:
962 return ret;
963 }
964 static DEVICE_ATTR(ad_select, S_IRUGO | S_IWUSR,
965 bonding_show_ad_select, bonding_store_ad_select);
966
967 /*
968 * Show and set the number of peer notifications to send after a failover event.
969 */
970 static ssize_t bonding_show_num_peer_notif(struct device *d,
971 struct device_attribute *attr,
972 char *buf)
973 {
974 struct bonding *bond = to_bond(d);
975 return sprintf(buf, "%d\n", bond->params.num_peer_notif);
976 }
977
978 static ssize_t bonding_store_num_peer_notif(struct device *d,
979 struct device_attribute *attr,
980 const char *buf, size_t count)
981 {
982 struct bonding *bond = to_bond(d);
983 int err = kstrtou8(buf, 10, &bond->params.num_peer_notif);
984 return err ? err : count;
985 }
986 static DEVICE_ATTR(num_grat_arp, S_IRUGO | S_IWUSR,
987 bonding_show_num_peer_notif, bonding_store_num_peer_notif);
988 static DEVICE_ATTR(num_unsol_na, S_IRUGO | S_IWUSR,
989 bonding_show_num_peer_notif, bonding_store_num_peer_notif);
990
991 /*
992 * Show and set the MII monitor interval. There are two tricky bits
993 * here. First, if MII monitoring is activated, then we must disable
994 * ARP monitoring. Second, if the timer isn't running, we must
995 * start it.
996 */
997 static ssize_t bonding_show_miimon(struct device *d,
998 struct device_attribute *attr,
999 char *buf)
1000 {
1001 struct bonding *bond = to_bond(d);
1002
1003 return sprintf(buf, "%d\n", bond->params.miimon);
1004 }
1005
1006 static ssize_t bonding_store_miimon(struct device *d,
1007 struct device_attribute *attr,
1008 const char *buf, size_t count)
1009 {
1010 int new_value, ret = count;
1011 struct bonding *bond = to_bond(d);
1012
1013 if (!rtnl_trylock())
1014 return restart_syscall();
1015 if (sscanf(buf, "%d", &new_value) != 1) {
1016 pr_err("%s: no miimon value specified.\n",
1017 bond->dev->name);
1018 ret = -EINVAL;
1019 goto out;
1020 }
1021 if (new_value < 0) {
1022 pr_err("%s: Invalid miimon value %d not in range %d-%d; rejected.\n",
1023 bond->dev->name, new_value, 0, INT_MAX);
1024 ret = -EINVAL;
1025 goto out;
1026 }
1027 pr_info("%s: Setting MII monitoring interval to %d.\n",
1028 bond->dev->name, new_value);
1029 bond->params.miimon = new_value;
1030 if (bond->params.updelay)
1031 pr_info("%s: Note: Updating updelay (to %d) since it is a multiple of the miimon value.\n",
1032 bond->dev->name,
1033 bond->params.updelay * bond->params.miimon);
1034 if (bond->params.downdelay)
1035 pr_info("%s: Note: Updating downdelay (to %d) since it is a multiple of the miimon value.\n",
1036 bond->dev->name,
1037 bond->params.downdelay * bond->params.miimon);
1038 if (new_value && bond->params.arp_interval) {
1039 pr_info("%s: MII monitoring cannot be used with ARP monitoring. Disabling ARP monitoring...\n",
1040 bond->dev->name);
1041 bond->params.arp_interval = 0;
1042 if (bond->params.arp_validate)
1043 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
1044 }
1045 if (bond->dev->flags & IFF_UP) {
1046 /* If the interface is up, we may need to fire off
1047 * the MII timer. If the interface is down, the
1048 * timer will get fired off when the open function
1049 * is called.
1050 */
1051 if (!new_value) {
1052 cancel_delayed_work_sync(&bond->mii_work);
1053 } else {
1054 cancel_delayed_work_sync(&bond->arp_work);
1055 queue_delayed_work(bond->wq, &bond->mii_work, 0);
1056 }
1057 }
1058 out:
1059 rtnl_unlock();
1060 return ret;
1061 }
1062 static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR,
1063 bonding_show_miimon, bonding_store_miimon);
1064
1065 /*
1066 * Show and set the primary slave. The store function is much
1067 * simpler than bonding_store_slaves function because it only needs to
1068 * handle one interface name.
1069 * The bond must be a mode that supports a primary for this be
1070 * set.
1071 */
1072 static ssize_t bonding_show_primary(struct device *d,
1073 struct device_attribute *attr,
1074 char *buf)
1075 {
1076 int count = 0;
1077 struct bonding *bond = to_bond(d);
1078
1079 if (bond->primary_slave)
1080 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);
1081
1082 return count;
1083 }
1084
1085 static ssize_t bonding_store_primary(struct device *d,
1086 struct device_attribute *attr,
1087 const char *buf, size_t count)
1088 {
1089 struct bonding *bond = to_bond(d);
1090 char ifname[IFNAMSIZ];
1091 struct slave *slave;
1092
1093 if (!rtnl_trylock())
1094 return restart_syscall();
1095 block_netpoll_tx();
1096 read_lock(&bond->lock);
1097 write_lock_bh(&bond->curr_slave_lock);
1098
1099 if (!USES_PRIMARY(bond->params.mode)) {
1100 pr_info("%s: Unable to set primary slave; %s is in mode %d\n",
1101 bond->dev->name, bond->dev->name, bond->params.mode);
1102 goto out;
1103 }
1104
1105 sscanf(buf, "%15s", ifname); /* IFNAMSIZ */
1106
1107 /* check to see if we are clearing primary */
1108 if (!strlen(ifname) || buf[0] == '\n') {
1109 pr_info("%s: Setting primary slave to None.\n",
1110 bond->dev->name);
1111 bond->primary_slave = NULL;
1112 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1113 bond_select_active_slave(bond);
1114 goto out;
1115 }
1116
1117 bond_for_each_slave(bond, slave) {
1118 if (strncmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
1119 pr_info("%s: Setting %s as primary slave.\n",
1120 bond->dev->name, slave->dev->name);
1121 bond->primary_slave = slave;
1122 strcpy(bond->params.primary, slave->dev->name);
1123 bond_select_active_slave(bond);
1124 goto out;
1125 }
1126 }
1127
1128 strncpy(bond->params.primary, ifname, IFNAMSIZ);
1129 bond->params.primary[IFNAMSIZ - 1] = 0;
1130
1131 pr_info("%s: Recording %s as primary, "
1132 "but it has not been enslaved to %s yet.\n",
1133 bond->dev->name, ifname, bond->dev->name);
1134 out:
1135 write_unlock_bh(&bond->curr_slave_lock);
1136 read_unlock(&bond->lock);
1137 unblock_netpoll_tx();
1138 rtnl_unlock();
1139
1140 return count;
1141 }
1142 static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR,
1143 bonding_show_primary, bonding_store_primary);
1144
1145 /*
1146 * Show and set the primary_reselect flag.
1147 */
1148 static ssize_t bonding_show_primary_reselect(struct device *d,
1149 struct device_attribute *attr,
1150 char *buf)
1151 {
1152 struct bonding *bond = to_bond(d);
1153
1154 return sprintf(buf, "%s %d\n",
1155 pri_reselect_tbl[bond->params.primary_reselect].modename,
1156 bond->params.primary_reselect);
1157 }
1158
1159 static ssize_t bonding_store_primary_reselect(struct device *d,
1160 struct device_attribute *attr,
1161 const char *buf, size_t count)
1162 {
1163 int new_value, ret = count;
1164 struct bonding *bond = to_bond(d);
1165
1166 if (!rtnl_trylock())
1167 return restart_syscall();
1168
1169 new_value = bond_parse_parm(buf, pri_reselect_tbl);
1170 if (new_value < 0) {
1171 pr_err("%s: Ignoring invalid primary_reselect value %.*s.\n",
1172 bond->dev->name,
1173 (int) strlen(buf) - 1, buf);
1174 ret = -EINVAL;
1175 goto out;
1176 }
1177
1178 bond->params.primary_reselect = new_value;
1179 pr_info("%s: setting primary_reselect to %s (%d).\n",
1180 bond->dev->name, pri_reselect_tbl[new_value].modename,
1181 new_value);
1182
1183 block_netpoll_tx();
1184 read_lock(&bond->lock);
1185 write_lock_bh(&bond->curr_slave_lock);
1186 bond_select_active_slave(bond);
1187 write_unlock_bh(&bond->curr_slave_lock);
1188 read_unlock(&bond->lock);
1189 unblock_netpoll_tx();
1190 out:
1191 rtnl_unlock();
1192 return ret;
1193 }
1194 static DEVICE_ATTR(primary_reselect, S_IRUGO | S_IWUSR,
1195 bonding_show_primary_reselect,
1196 bonding_store_primary_reselect);
1197
1198 /*
1199 * Show and set the use_carrier flag.
1200 */
1201 static ssize_t bonding_show_carrier(struct device *d,
1202 struct device_attribute *attr,
1203 char *buf)
1204 {
1205 struct bonding *bond = to_bond(d);
1206
1207 return sprintf(buf, "%d\n", bond->params.use_carrier);
1208 }
1209
1210 static ssize_t bonding_store_carrier(struct device *d,
1211 struct device_attribute *attr,
1212 const char *buf, size_t count)
1213 {
1214 int new_value, ret = count;
1215 struct bonding *bond = to_bond(d);
1216
1217
1218 if (sscanf(buf, "%d", &new_value) != 1) {
1219 pr_err("%s: no use_carrier value specified.\n",
1220 bond->dev->name);
1221 ret = -EINVAL;
1222 goto out;
1223 }
1224 if ((new_value == 0) || (new_value == 1)) {
1225 bond->params.use_carrier = new_value;
1226 pr_info("%s: Setting use_carrier to %d.\n",
1227 bond->dev->name, new_value);
1228 } else {
1229 pr_info("%s: Ignoring invalid use_carrier value %d.\n",
1230 bond->dev->name, new_value);
1231 }
1232 out:
1233 return ret;
1234 }
1235 static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR,
1236 bonding_show_carrier, bonding_store_carrier);
1237
1238
1239 /*
1240 * Show and set currently active_slave.
1241 */
1242 static ssize_t bonding_show_active_slave(struct device *d,
1243 struct device_attribute *attr,
1244 char *buf)
1245 {
1246 struct bonding *bond = to_bond(d);
1247 struct slave *curr;
1248 int count = 0;
1249
1250 rcu_read_lock();
1251 curr = rcu_dereference(bond->curr_active_slave);
1252 if (USES_PRIMARY(bond->params.mode) && curr)
1253 count = sprintf(buf, "%s\n", curr->dev->name);
1254 rcu_read_unlock();
1255
1256 return count;
1257 }
1258
1259 static ssize_t bonding_store_active_slave(struct device *d,
1260 struct device_attribute *attr,
1261 const char *buf, size_t count)
1262 {
1263 struct slave *slave, *old_active, *new_active;
1264 struct bonding *bond = to_bond(d);
1265 char ifname[IFNAMSIZ];
1266
1267 if (!rtnl_trylock())
1268 return restart_syscall();
1269
1270 old_active = new_active = NULL;
1271 block_netpoll_tx();
1272 read_lock(&bond->lock);
1273 write_lock_bh(&bond->curr_slave_lock);
1274
1275 if (!USES_PRIMARY(bond->params.mode)) {
1276 pr_info("%s: Unable to change active slave; %s is in mode %d\n",
1277 bond->dev->name, bond->dev->name, bond->params.mode);
1278 goto out;
1279 }
1280
1281 sscanf(buf, "%15s", ifname); /* IFNAMSIZ */
1282
1283 /* check to see if we are clearing active */
1284 if (!strlen(ifname) || buf[0] == '\n') {
1285 pr_info("%s: Clearing current active slave.\n",
1286 bond->dev->name);
1287 rcu_assign_pointer(bond->curr_active_slave, NULL);
1288 bond_select_active_slave(bond);
1289 goto out;
1290 }
1291
1292 bond_for_each_slave(bond, slave) {
1293 if (strncmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
1294 old_active = bond->curr_active_slave;
1295 new_active = slave;
1296 if (new_active == old_active) {
1297 /* do nothing */
1298 pr_info("%s: %s is already the current"
1299 " active slave.\n",
1300 bond->dev->name,
1301 slave->dev->name);
1302 goto out;
1303 } else {
1304 if ((new_active) &&
1305 (old_active) &&
1306 (new_active->link == BOND_LINK_UP) &&
1307 IS_UP(new_active->dev)) {
1308 pr_info("%s: Setting %s as active"
1309 " slave.\n",
1310 bond->dev->name,
1311 slave->dev->name);
1312 bond_change_active_slave(bond,
1313 new_active);
1314 } else {
1315 pr_info("%s: Could not set %s as"
1316 " active slave; either %s is"
1317 " down or the link is down.\n",
1318 bond->dev->name,
1319 slave->dev->name,
1320 slave->dev->name);
1321 }
1322 goto out;
1323 }
1324 }
1325 }
1326
1327 pr_info("%s: Unable to set %.*s as active slave.\n",
1328 bond->dev->name, (int)strlen(buf) - 1, buf);
1329 out:
1330 write_unlock_bh(&bond->curr_slave_lock);
1331 read_unlock(&bond->lock);
1332 unblock_netpoll_tx();
1333
1334 rtnl_unlock();
1335
1336 return count;
1337
1338 }
1339 static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR,
1340 bonding_show_active_slave, bonding_store_active_slave);
1341
1342
1343 /*
1344 * Show link status of the bond interface.
1345 */
1346 static ssize_t bonding_show_mii_status(struct device *d,
1347 struct device_attribute *attr,
1348 char *buf)
1349 {
1350 struct bonding *bond = to_bond(d);
1351
1352 return sprintf(buf, "%s\n", bond->curr_active_slave ? "up" : "down");
1353 }
1354 static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1355
1356 /*
1357 * Show current 802.3ad aggregator ID.
1358 */
1359 static ssize_t bonding_show_ad_aggregator(struct device *d,
1360 struct device_attribute *attr,
1361 char *buf)
1362 {
1363 int count = 0;
1364 struct bonding *bond = to_bond(d);
1365
1366 if (bond->params.mode == BOND_MODE_8023AD) {
1367 struct ad_info ad_info;
1368 count = sprintf(buf, "%d\n",
1369 bond_3ad_get_active_agg_info(bond, &ad_info)
1370 ? 0 : ad_info.aggregator_id);
1371 }
1372
1373 return count;
1374 }
1375 static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1376
1377
1378 /*
1379 * Show number of active 802.3ad ports.
1380 */
1381 static ssize_t bonding_show_ad_num_ports(struct device *d,
1382 struct device_attribute *attr,
1383 char *buf)
1384 {
1385 int count = 0;
1386 struct bonding *bond = to_bond(d);
1387
1388 if (bond->params.mode == BOND_MODE_8023AD) {
1389 struct ad_info ad_info;
1390 count = sprintf(buf, "%d\n",
1391 bond_3ad_get_active_agg_info(bond, &ad_info)
1392 ? 0 : ad_info.ports);
1393 }
1394
1395 return count;
1396 }
1397 static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1398
1399
1400 /*
1401 * Show current 802.3ad actor key.
1402 */
1403 static ssize_t bonding_show_ad_actor_key(struct device *d,
1404 struct device_attribute *attr,
1405 char *buf)
1406 {
1407 int count = 0;
1408 struct bonding *bond = to_bond(d);
1409
1410 if (bond->params.mode == BOND_MODE_8023AD) {
1411 struct ad_info ad_info;
1412 count = sprintf(buf, "%d\n",
1413 bond_3ad_get_active_agg_info(bond, &ad_info)
1414 ? 0 : ad_info.actor_key);
1415 }
1416
1417 return count;
1418 }
1419 static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1420
1421
1422 /*
1423 * Show current 802.3ad partner key.
1424 */
1425 static ssize_t bonding_show_ad_partner_key(struct device *d,
1426 struct device_attribute *attr,
1427 char *buf)
1428 {
1429 int count = 0;
1430 struct bonding *bond = to_bond(d);
1431
1432 if (bond->params.mode == BOND_MODE_8023AD) {
1433 struct ad_info ad_info;
1434 count = sprintf(buf, "%d\n",
1435 bond_3ad_get_active_agg_info(bond, &ad_info)
1436 ? 0 : ad_info.partner_key);
1437 }
1438
1439 return count;
1440 }
1441 static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1442
1443
1444 /*
1445 * Show current 802.3ad partner mac.
1446 */
1447 static ssize_t bonding_show_ad_partner_mac(struct device *d,
1448 struct device_attribute *attr,
1449 char *buf)
1450 {
1451 int count = 0;
1452 struct bonding *bond = to_bond(d);
1453
1454 if (bond->params.mode == BOND_MODE_8023AD) {
1455 struct ad_info ad_info;
1456 if (!bond_3ad_get_active_agg_info(bond, &ad_info))
1457 count = sprintf(buf, "%pM\n", ad_info.partner_system);
1458 }
1459
1460 return count;
1461 }
1462 static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1463
1464 /*
1465 * Show the queue_ids of the slaves in the current bond.
1466 */
1467 static ssize_t bonding_show_queue_id(struct device *d,
1468 struct device_attribute *attr,
1469 char *buf)
1470 {
1471 struct bonding *bond = to_bond(d);
1472 struct slave *slave;
1473 int res = 0;
1474
1475 if (!rtnl_trylock())
1476 return restart_syscall();
1477
1478 read_lock(&bond->lock);
1479 bond_for_each_slave(bond, slave) {
1480 if (res > (PAGE_SIZE - IFNAMSIZ - 6)) {
1481 /* not enough space for another interface_name:queue_id pair */
1482 if ((PAGE_SIZE - res) > 10)
1483 res = PAGE_SIZE - 10;
1484 res += sprintf(buf + res, "++more++ ");
1485 break;
1486 }
1487 res += sprintf(buf + res, "%s:%d ",
1488 slave->dev->name, slave->queue_id);
1489 }
1490 read_unlock(&bond->lock);
1491 if (res)
1492 buf[res-1] = '\n'; /* eat the leftover space */
1493 rtnl_unlock();
1494
1495 return res;
1496 }
1497
1498 /*
1499 * Set the queue_ids of the slaves in the current bond. The bond
1500 * interface must be enslaved for this to work.
1501 */
1502 static ssize_t bonding_store_queue_id(struct device *d,
1503 struct device_attribute *attr,
1504 const char *buffer, size_t count)
1505 {
1506 struct slave *slave, *update_slave;
1507 struct bonding *bond = to_bond(d);
1508 u16 qid;
1509 int ret = count;
1510 char *delim;
1511 struct net_device *sdev = NULL;
1512
1513 if (!rtnl_trylock())
1514 return restart_syscall();
1515
1516 /* delim will point to queue id if successful */
1517 delim = strchr(buffer, ':');
1518 if (!delim)
1519 goto err_no_cmd;
1520
1521 /*
1522 * Terminate string that points to device name and bump it
1523 * up one, so we can read the queue id there.
1524 */
1525 *delim = '\0';
1526 if (sscanf(++delim, "%hd\n", &qid) != 1)
1527 goto err_no_cmd;
1528
1529 /* Check buffer length, valid ifname and queue id */
1530 if (strlen(buffer) > IFNAMSIZ ||
1531 !dev_valid_name(buffer) ||
1532 qid > bond->dev->real_num_tx_queues)
1533 goto err_no_cmd;
1534
1535 /* Get the pointer to that interface if it exists */
1536 sdev = __dev_get_by_name(dev_net(bond->dev), buffer);
1537 if (!sdev)
1538 goto err_no_cmd;
1539
1540 read_lock(&bond->lock);
1541
1542 /* Search for thes slave and check for duplicate qids */
1543 update_slave = NULL;
1544 bond_for_each_slave(bond, slave) {
1545 if (sdev == slave->dev)
1546 /*
1547 * We don't need to check the matching
1548 * slave for dups, since we're overwriting it
1549 */
1550 update_slave = slave;
1551 else if (qid && qid == slave->queue_id) {
1552 goto err_no_cmd_unlock;
1553 }
1554 }
1555
1556 if (!update_slave)
1557 goto err_no_cmd_unlock;
1558
1559 /* Actually set the qids for the slave */
1560 update_slave->queue_id = qid;
1561
1562 read_unlock(&bond->lock);
1563 out:
1564 rtnl_unlock();
1565 return ret;
1566
1567 err_no_cmd_unlock:
1568 read_unlock(&bond->lock);
1569 err_no_cmd:
1570 pr_info("invalid input for queue_id set for %s.\n",
1571 bond->dev->name);
1572 ret = -EPERM;
1573 goto out;
1574 }
1575
1576 static DEVICE_ATTR(queue_id, S_IRUGO | S_IWUSR, bonding_show_queue_id,
1577 bonding_store_queue_id);
1578
1579
1580 /*
1581 * Show and set the all_slaves_active flag.
1582 */
1583 static ssize_t bonding_show_slaves_active(struct device *d,
1584 struct device_attribute *attr,
1585 char *buf)
1586 {
1587 struct bonding *bond = to_bond(d);
1588
1589 return sprintf(buf, "%d\n", bond->params.all_slaves_active);
1590 }
1591
1592 static ssize_t bonding_store_slaves_active(struct device *d,
1593 struct device_attribute *attr,
1594 const char *buf, size_t count)
1595 {
1596 struct bonding *bond = to_bond(d);
1597 int new_value, ret = count;
1598 struct slave *slave;
1599
1600 if (sscanf(buf, "%d", &new_value) != 1) {
1601 pr_err("%s: no all_slaves_active value specified.\n",
1602 bond->dev->name);
1603 ret = -EINVAL;
1604 goto out;
1605 }
1606
1607 if (new_value == bond->params.all_slaves_active)
1608 goto out;
1609
1610 if ((new_value == 0) || (new_value == 1)) {
1611 bond->params.all_slaves_active = new_value;
1612 } else {
1613 pr_info("%s: Ignoring invalid all_slaves_active value %d.\n",
1614 bond->dev->name, new_value);
1615 ret = -EINVAL;
1616 goto out;
1617 }
1618
1619 read_lock(&bond->lock);
1620 bond_for_each_slave(bond, slave) {
1621 if (!bond_is_active_slave(slave)) {
1622 if (new_value)
1623 slave->inactive = 0;
1624 else
1625 slave->inactive = 1;
1626 }
1627 }
1628 read_unlock(&bond->lock);
1629 out:
1630 return ret;
1631 }
1632 static DEVICE_ATTR(all_slaves_active, S_IRUGO | S_IWUSR,
1633 bonding_show_slaves_active, bonding_store_slaves_active);
1634
1635 /*
1636 * Show and set the number of IGMP membership reports to send on link failure
1637 */
1638 static ssize_t bonding_show_resend_igmp(struct device *d,
1639 struct device_attribute *attr,
1640 char *buf)
1641 {
1642 struct bonding *bond = to_bond(d);
1643
1644 return sprintf(buf, "%d\n", bond->params.resend_igmp);
1645 }
1646
1647 static ssize_t bonding_store_resend_igmp(struct device *d,
1648 struct device_attribute *attr,
1649 const char *buf, size_t count)
1650 {
1651 int new_value, ret = count;
1652 struct bonding *bond = to_bond(d);
1653
1654 if (sscanf(buf, "%d", &new_value) != 1) {
1655 pr_err("%s: no resend_igmp value specified.\n",
1656 bond->dev->name);
1657 ret = -EINVAL;
1658 goto out;
1659 }
1660
1661 if (new_value < 0 || new_value > 255) {
1662 pr_err("%s: Invalid resend_igmp value %d not in range 0-255; rejected.\n",
1663 bond->dev->name, new_value);
1664 ret = -EINVAL;
1665 goto out;
1666 }
1667
1668 pr_info("%s: Setting resend_igmp to %d.\n",
1669 bond->dev->name, new_value);
1670 bond->params.resend_igmp = new_value;
1671 out:
1672 return ret;
1673 }
1674
1675 static DEVICE_ATTR(resend_igmp, S_IRUGO | S_IWUSR,
1676 bonding_show_resend_igmp, bonding_store_resend_igmp);
1677
1678 static struct attribute *per_bond_attrs[] = {
1679 &dev_attr_slaves.attr,
1680 &dev_attr_mode.attr,
1681 &dev_attr_fail_over_mac.attr,
1682 &dev_attr_arp_validate.attr,
1683 &dev_attr_arp_all_targets.attr,
1684 &dev_attr_arp_interval.attr,
1685 &dev_attr_arp_ip_target.attr,
1686 &dev_attr_downdelay.attr,
1687 &dev_attr_updelay.attr,
1688 &dev_attr_lacp_rate.attr,
1689 &dev_attr_ad_select.attr,
1690 &dev_attr_xmit_hash_policy.attr,
1691 &dev_attr_num_grat_arp.attr,
1692 &dev_attr_num_unsol_na.attr,
1693 &dev_attr_miimon.attr,
1694 &dev_attr_primary.attr,
1695 &dev_attr_primary_reselect.attr,
1696 &dev_attr_use_carrier.attr,
1697 &dev_attr_active_slave.attr,
1698 &dev_attr_mii_status.attr,
1699 &dev_attr_ad_aggregator.attr,
1700 &dev_attr_ad_num_ports.attr,
1701 &dev_attr_ad_actor_key.attr,
1702 &dev_attr_ad_partner_key.attr,
1703 &dev_attr_ad_partner_mac.attr,
1704 &dev_attr_queue_id.attr,
1705 &dev_attr_all_slaves_active.attr,
1706 &dev_attr_resend_igmp.attr,
1707 &dev_attr_min_links.attr,
1708 NULL,
1709 };
1710
1711 static struct attribute_group bonding_group = {
1712 .name = "bonding",
1713 .attrs = per_bond_attrs,
1714 };
1715
1716 /*
1717 * Initialize sysfs. This sets up the bonding_masters file in
1718 * /sys/class/net.
1719 */
1720 int bond_create_sysfs(struct bond_net *bn)
1721 {
1722 int ret;
1723
1724 bn->class_attr_bonding_masters = class_attr_bonding_masters;
1725 sysfs_attr_init(&bn->class_attr_bonding_masters.attr);
1726
1727 ret = netdev_class_create_file(&bn->class_attr_bonding_masters);
1728 /*
1729 * Permit multiple loads of the module by ignoring failures to
1730 * create the bonding_masters sysfs file. Bonding devices
1731 * created by second or subsequent loads of the module will
1732 * not be listed in, or controllable by, bonding_masters, but
1733 * will have the usual "bonding" sysfs directory.
1734 *
1735 * This is done to preserve backwards compatibility for
1736 * initscripts/sysconfig, which load bonding multiple times to
1737 * configure multiple bonding devices.
1738 */
1739 if (ret == -EEXIST) {
1740 /* Is someone being kinky and naming a device bonding_master? */
1741 if (__dev_get_by_name(bn->net,
1742 class_attr_bonding_masters.attr.name))
1743 pr_err("network device named %s already exists in sysfs",
1744 class_attr_bonding_masters.attr.name);
1745 ret = 0;
1746 }
1747
1748 return ret;
1749
1750 }
1751
1752 /*
1753 * Remove /sys/class/net/bonding_masters.
1754 */
1755 void bond_destroy_sysfs(struct bond_net *bn)
1756 {
1757 netdev_class_remove_file(&bn->class_attr_bonding_masters);
1758 }
1759
1760 /*
1761 * Initialize sysfs for each bond. This sets up and registers
1762 * the 'bondctl' directory for each individual bond under /sys/class/net.
1763 */
1764 void bond_prepare_sysfs_group(struct bonding *bond)
1765 {
1766 bond->dev->sysfs_groups[0] = &bonding_group;
1767 }
1768
Linux kernel - Deliverables
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