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Merge branch 'for-3.11' of git://linux-nfs.org/~bfields/linux
[linux-2.6.git] / drivers / net / bonding / bond_sysfs.c
blobdc36a3d7d9e983a15583260a572e6dac7451acb5
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 slave *slave;
213 int i, res = 0;
214 struct bonding *bond = to_bond(d);
215
216 read_lock(&bond->lock);
217 bond_for_each_slave(bond, slave, i) {
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 return res;
231 }
232
233 /*
234 * Set the slaves in the current bond.
235 * This is supposed to be only thin wrapper for bond_enslave and bond_release.
236 * All hard work should be done there.
237 */
238 static ssize_t bonding_store_slaves(struct device *d,
239 struct device_attribute *attr,
240 const char *buffer, size_t count)
241 {
242 char command[IFNAMSIZ + 1] = { 0, };
243 char *ifname;
244 int res, ret = count;
245 struct net_device *dev;
246 struct bonding *bond = to_bond(d);
247
248 if (!rtnl_trylock())
249 return restart_syscall();
250
251 sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
252 ifname = command + 1;
253 if ((strlen(command) <= 1) ||
254 !dev_valid_name(ifname))
255 goto err_no_cmd;
256
257 dev = __dev_get_by_name(dev_net(bond->dev), ifname);
258 if (!dev) {
259 pr_info("%s: Interface %s does not exist!\n",
260 bond->dev->name, ifname);
261 ret = -ENODEV;
262 goto out;
263 }
264
265 switch (command[0]) {
266 case '+':
267 pr_info("%s: Adding slave %s.\n", bond->dev->name, dev->name);
268 res = bond_enslave(bond->dev, dev);
269 break;
270
271 case '-':
272 pr_info("%s: Removing slave %s.\n", bond->dev->name, dev->name);
273 res = bond_release(bond->dev, dev);
274 break;
275
276 default:
277 goto err_no_cmd;
278 }
279
280 if (res)
281 ret = res;
282 goto out;
283
284 err_no_cmd:
285 pr_err("no command found in slaves file for bond %s. Use +ifname or -ifname.\n",
286 bond->dev->name);
287 ret = -EPERM;
288
289 out:
290 rtnl_unlock();
291 return ret;
292 }
293
294 static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves,
295 bonding_store_slaves);
296
297 /*
298 * Show and set the bonding mode. The bond interface must be down to
299 * change the mode.
300 */
301 static ssize_t bonding_show_mode(struct device *d,
302 struct device_attribute *attr, char *buf)
303 {
304 struct bonding *bond = to_bond(d);
305
306 return sprintf(buf, "%s %d\n",
307 bond_mode_tbl[bond->params.mode].modename,
308 bond->params.mode);
309 }
310
311 static ssize_t bonding_store_mode(struct device *d,
312 struct device_attribute *attr,
313 const char *buf, size_t count)
314 {
315 int new_value, ret = count;
316 struct bonding *bond = to_bond(d);
317
318 if (!rtnl_trylock())
319 return restart_syscall();
320
321 if (bond->dev->flags & IFF_UP) {
322 pr_err("unable to update mode of %s because interface is up.\n",
323 bond->dev->name);
324 ret = -EPERM;
325 goto out;
326 }
327
328 if (bond->slave_cnt > 0) {
329 pr_err("unable to update mode of %s because it has slaves.\n",
330 bond->dev->name);
331 ret = -EPERM;
332 goto out;
333 }
334
335 new_value = bond_parse_parm(buf, bond_mode_tbl);
336 if (new_value < 0) {
337 pr_err("%s: Ignoring invalid mode value %.*s.\n",
338 bond->dev->name, (int)strlen(buf) - 1, buf);
339 ret = -EINVAL;
340 goto out;
341 }
342 if ((new_value == BOND_MODE_ALB ||
343 new_value == BOND_MODE_TLB) &&
344 bond->params.arp_interval) {
345 pr_err("%s: %s mode is incompatible with arp monitoring.\n",
346 bond->dev->name, bond_mode_tbl[new_value].modename);
347 ret = -EINVAL;
348 goto out;
349 }
350
351 bond->params.mode = new_value;
352 bond_set_mode_ops(bond, bond->params.mode);
353 pr_info("%s: setting mode to %s (%d).\n",
354 bond->dev->name, bond_mode_tbl[new_value].modename,
355 new_value);
356 out:
357 rtnl_unlock();
358 return ret;
359 }
360 static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,
361 bonding_show_mode, bonding_store_mode);
362
363 /*
364 * Show and set the bonding transmit hash method.
365 */
366 static ssize_t bonding_show_xmit_hash(struct device *d,
367 struct device_attribute *attr,
368 char *buf)
369 {
370 struct bonding *bond = to_bond(d);
371
372 return sprintf(buf, "%s %d\n",
373 xmit_hashtype_tbl[bond->params.xmit_policy].modename,
374 bond->params.xmit_policy);
375 }
376
377 static ssize_t bonding_store_xmit_hash(struct device *d,
378 struct device_attribute *attr,
379 const char *buf, size_t count)
380 {
381 int new_value, ret = count;
382 struct bonding *bond = to_bond(d);
383
384 new_value = bond_parse_parm(buf, xmit_hashtype_tbl);
385 if (new_value < 0) {
386 pr_err("%s: Ignoring invalid xmit hash policy value %.*s.\n",
387 bond->dev->name,
388 (int)strlen(buf) - 1, buf);
389 ret = -EINVAL;
390 } else {
391 bond->params.xmit_policy = new_value;
392 bond_set_mode_ops(bond, bond->params.mode);
393 pr_info("%s: setting xmit hash policy to %s (%d).\n",
394 bond->dev->name,
395 xmit_hashtype_tbl[new_value].modename, new_value);
396 }
397
398 return ret;
399 }
400 static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR,
401 bonding_show_xmit_hash, bonding_store_xmit_hash);
402
403 /*
404 * Show and set arp_validate.
405 */
406 static ssize_t bonding_show_arp_validate(struct device *d,
407 struct device_attribute *attr,
408 char *buf)
409 {
410 struct bonding *bond = to_bond(d);
411
412 return sprintf(buf, "%s %d\n",
413 arp_validate_tbl[bond->params.arp_validate].modename,
414 bond->params.arp_validate);
415 }
416
417 static ssize_t bonding_store_arp_validate(struct device *d,
418 struct device_attribute *attr,
419 const char *buf, size_t count)
420 {
421 int new_value;
422 struct bonding *bond = to_bond(d);
423
424 new_value = bond_parse_parm(buf, arp_validate_tbl);
425 if (new_value < 0) {
426 pr_err("%s: Ignoring invalid arp_validate value %s\n",
427 bond->dev->name, buf);
428 return -EINVAL;
429 }
430 if (new_value && (bond->params.mode != BOND_MODE_ACTIVEBACKUP)) {
431 pr_err("%s: arp_validate only supported in active-backup mode.\n",
432 bond->dev->name);
433 return -EINVAL;
434 }
435 pr_info("%s: setting arp_validate to %s (%d).\n",
436 bond->dev->name, arp_validate_tbl[new_value].modename,
437 new_value);
438
439 bond->params.arp_validate = new_value;
440
441 return count;
442 }
443
444 static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate,
445 bonding_store_arp_validate);
446 /*
447 * Show and set arp_all_targets.
448 */
449 static ssize_t bonding_show_arp_all_targets(struct device *d,
450 struct device_attribute *attr,
451 char *buf)
452 {
453 struct bonding *bond = to_bond(d);
454 int value = bond->params.arp_all_targets;
455
456 return sprintf(buf, "%s %d\n", arp_all_targets_tbl[value].modename,
457 value);
458 }
459
460 static ssize_t bonding_store_arp_all_targets(struct device *d,
461 struct device_attribute *attr,
462 const char *buf, size_t count)
463 {
464 struct bonding *bond = to_bond(d);
465 int new_value;
466
467 new_value = bond_parse_parm(buf, arp_all_targets_tbl);
468 if (new_value < 0) {
469 pr_err("%s: Ignoring invalid arp_all_targets value %s\n",
470 bond->dev->name, buf);
471 return -EINVAL;
472 }
473 pr_info("%s: setting arp_all_targets to %s (%d).\n",
474 bond->dev->name, arp_all_targets_tbl[new_value].modename,
475 new_value);
476
477 bond->params.arp_all_targets = new_value;
478
479 return count;
480 }
481
482 static DEVICE_ATTR(arp_all_targets, S_IRUGO | S_IWUSR,
483 bonding_show_arp_all_targets, bonding_store_arp_all_targets);
484
485 /*
486 * Show and store fail_over_mac. User only allowed to change the
487 * value when there are no slaves.
488 */
489 static ssize_t bonding_show_fail_over_mac(struct device *d,
490 struct device_attribute *attr,
491 char *buf)
492 {
493 struct bonding *bond = to_bond(d);
494
495 return sprintf(buf, "%s %d\n",
496 fail_over_mac_tbl[bond->params.fail_over_mac].modename,
497 bond->params.fail_over_mac);
498 }
499
500 static ssize_t bonding_store_fail_over_mac(struct device *d,
501 struct device_attribute *attr,
502 const char *buf, size_t count)
503 {
504 int new_value;
505 struct bonding *bond = to_bond(d);
506
507 if (bond->slave_cnt != 0) {
508 pr_err("%s: Can't alter fail_over_mac with slaves in bond.\n",
509 bond->dev->name);
510 return -EPERM;
511 }
512
513 new_value = bond_parse_parm(buf, fail_over_mac_tbl);
514 if (new_value < 0) {
515 pr_err("%s: Ignoring invalid fail_over_mac value %s.\n",
516 bond->dev->name, buf);
517 return -EINVAL;
518 }
519
520 bond->params.fail_over_mac = new_value;
521 pr_info("%s: Setting fail_over_mac to %s (%d).\n",
522 bond->dev->name, fail_over_mac_tbl[new_value].modename,
523 new_value);
524
525 return count;
526 }
527
528 static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR,
529 bonding_show_fail_over_mac, bonding_store_fail_over_mac);
530
531 /*
532 * Show and set the arp timer interval. There are two tricky bits
533 * here. First, if ARP monitoring is activated, then we must disable
534 * MII monitoring. Second, if the ARP timer isn't running, we must
535 * start it.
536 */
537 static ssize_t bonding_show_arp_interval(struct device *d,
538 struct device_attribute *attr,
539 char *buf)
540 {
541 struct bonding *bond = to_bond(d);
542
543 return sprintf(buf, "%d\n", bond->params.arp_interval);
544 }
545
546 static ssize_t bonding_store_arp_interval(struct device *d,
547 struct device_attribute *attr,
548 const char *buf, size_t count)
549 {
550 int new_value, ret = count;
551 struct bonding *bond = to_bond(d);
552
553 if (!rtnl_trylock())
554 return restart_syscall();
555 if (sscanf(buf, "%d", &new_value) != 1) {
556 pr_err("%s: no arp_interval value specified.\n",
557 bond->dev->name);
558 ret = -EINVAL;
559 goto out;
560 }
561 if (new_value < 0) {
562 pr_err("%s: Invalid arp_interval value %d not in range 0-%d; rejected.\n",
563 bond->dev->name, new_value, INT_MAX);
564 ret = -EINVAL;
565 goto out;
566 }
567 if (bond->params.mode == BOND_MODE_ALB ||
568 bond->params.mode == BOND_MODE_TLB) {
569 pr_info("%s: ARP monitoring cannot be used with ALB/TLB. Only MII monitoring is supported on %s.\n",
570 bond->dev->name, bond->dev->name);
571 ret = -EINVAL;
572 goto out;
573 }
574 pr_info("%s: Setting ARP monitoring interval to %d.\n",
575 bond->dev->name, new_value);
576 bond->params.arp_interval = new_value;
577 if (new_value) {
578 if (bond->params.miimon) {
579 pr_info("%s: ARP monitoring cannot be used with MII monitoring. %s Disabling MII monitoring.\n",
580 bond->dev->name, bond->dev->name);
581 bond->params.miimon = 0;
582 }
583 if (!bond->params.arp_targets[0])
584 pr_info("%s: ARP monitoring has been set up, but no ARP targets have been specified.\n",
585 bond->dev->name);
586 }
587 if (bond->dev->flags & IFF_UP) {
588 /* If the interface is up, we may need to fire off
589 * the ARP timer. If the interface is down, the
590 * timer will get fired off when the open function
591 * is called.
592 */
593 if (!new_value) {
594 cancel_delayed_work_sync(&bond->arp_work);
595 } else {
596 cancel_delayed_work_sync(&bond->mii_work);
597 queue_delayed_work(bond->wq, &bond->arp_work, 0);
598 }
599 }
600 out:
601 rtnl_unlock();
602 return ret;
603 }
604 static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR,
605 bonding_show_arp_interval, bonding_store_arp_interval);
606
607 /*
608 * Show and set the arp targets.
609 */
610 static ssize_t bonding_show_arp_targets(struct device *d,
611 struct device_attribute *attr,
612 char *buf)
613 {
614 int i, res = 0;
615 struct bonding *bond = to_bond(d);
616
617 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
618 if (bond->params.arp_targets[i])
619 res += sprintf(buf + res, "%pI4 ",
620 &bond->params.arp_targets[i]);
621 }
622 if (res)
623 buf[res-1] = '\n'; /* eat the leftover space */
624 return res;
625 }
626
627 static ssize_t bonding_store_arp_targets(struct device *d,
628 struct device_attribute *attr,
629 const char *buf, size_t count)
630 {
631 struct bonding *bond = to_bond(d);
632 struct slave *slave;
633 __be32 newtarget, *targets;
634 unsigned long *targets_rx;
635 int ind, i, j, ret = -EINVAL;
636
637 targets = bond->params.arp_targets;
638 newtarget = in_aton(buf + 1);
639 /* look for adds */
640 if (buf[0] == '+') {
641 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
642 pr_err("%s: invalid ARP target %pI4 specified for addition\n",
643 bond->dev->name, &newtarget);
644 goto out;
645 }
646
647 if (bond_get_targets_ip(targets, newtarget) != -1) { /* dup */
648 pr_err("%s: ARP target %pI4 is already present\n",
649 bond->dev->name, &newtarget);
650 goto out;
651 }
652
653 ind = bond_get_targets_ip(targets, 0); /* first free slot */
654 if (ind == -1) {
655 pr_err("%s: ARP target table is full!\n",
656 bond->dev->name);
657 goto out;
658 }
659
660 pr_info("%s: adding ARP target %pI4.\n", bond->dev->name,
661 &newtarget);
662 /* not to race with bond_arp_rcv */
663 write_lock_bh(&bond->lock);
664 bond_for_each_slave(bond, slave, i)
665 slave->target_last_arp_rx[ind] = jiffies;
666 targets[ind] = newtarget;
667 write_unlock_bh(&bond->lock);
668 } else if (buf[0] == '-') {
669 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
670 pr_err("%s: invalid ARP target %pI4 specified for removal\n",
671 bond->dev->name, &newtarget);
672 goto out;
673 }
674
675 ind = bond_get_targets_ip(targets, newtarget);
676 if (ind == -1) {
677 pr_err("%s: unable to remove nonexistent ARP target %pI4.\n",
678 bond->dev->name, &newtarget);
679 goto out;
680 }
681
682 if (ind == 0 && !targets[1] && bond->params.arp_interval)
683 pr_warn("%s: removing last arp target with arp_interval on\n",
684 bond->dev->name);
685
686 pr_info("%s: removing ARP target %pI4.\n", bond->dev->name,
687 &newtarget);
688
689 write_lock_bh(&bond->lock);
690 bond_for_each_slave(bond, slave, i) {
691 targets_rx = slave->target_last_arp_rx;
692 j = ind;
693 for (; (j < BOND_MAX_ARP_TARGETS-1) && targets[j+1]; j++)
694 targets_rx[j] = targets_rx[j+1];
695 targets_rx[j] = 0;
696 }
697 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
698 targets[i] = targets[i+1];
699 targets[i] = 0;
700 write_unlock_bh(&bond->lock);
701 } else {
702 pr_err("no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
703 bond->dev->name);
704 ret = -EPERM;
705 goto out;
706 }
707
708 ret = count;
709 out:
710 return ret;
711 }
712 static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
713
714 /*
715 * Show and set the up and down delays. These must be multiples of the
716 * MII monitoring value, and are stored internally as the multiplier.
717 * Thus, we must translate to MS for the real world.
718 */
719 static ssize_t bonding_show_downdelay(struct device *d,
720 struct device_attribute *attr,
721 char *buf)
722 {
723 struct bonding *bond = to_bond(d);
724
725 return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
726 }
727
728 static ssize_t bonding_store_downdelay(struct device *d,
729 struct device_attribute *attr,
730 const char *buf, size_t count)
731 {
732 int new_value, ret = count;
733 struct bonding *bond = to_bond(d);
734
735 if (!(bond->params.miimon)) {
736 pr_err("%s: Unable to set down delay as MII monitoring is disabled\n",
737 bond->dev->name);
738 ret = -EPERM;
739 goto out;
740 }
741
742 if (sscanf(buf, "%d", &new_value) != 1) {
743 pr_err("%s: no down delay value specified.\n", bond->dev->name);
744 ret = -EINVAL;
745 goto out;
746 }
747 if (new_value < 0) {
748 pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n",
749 bond->dev->name, new_value, 0, INT_MAX);
750 ret = -EINVAL;
751 goto out;
752 } else {
753 if ((new_value % bond->params.miimon) != 0) {
754 pr_warning("%s: Warning: down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
755 bond->dev->name, new_value,
756 bond->params.miimon,
757 (new_value / bond->params.miimon) *
758 bond->params.miimon);
759 }
760 bond->params.downdelay = new_value / bond->params.miimon;
761 pr_info("%s: Setting down delay to %d.\n",
762 bond->dev->name,
763 bond->params.downdelay * bond->params.miimon);
764
765 }
766
767 out:
768 return ret;
769 }
770 static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR,
771 bonding_show_downdelay, bonding_store_downdelay);
772
773 static ssize_t bonding_show_updelay(struct device *d,
774 struct device_attribute *attr,
775 char *buf)
776 {
777 struct bonding *bond = to_bond(d);
778
779 return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
780
781 }
782
783 static ssize_t bonding_store_updelay(struct device *d,
784 struct device_attribute *attr,
785 const char *buf, size_t count)
786 {
787 int new_value, ret = count;
788 struct bonding *bond = to_bond(d);
789
790 if (!(bond->params.miimon)) {
791 pr_err("%s: Unable to set up delay as MII monitoring is disabled\n",
792 bond->dev->name);
793 ret = -EPERM;
794 goto out;
795 }
796
797 if (sscanf(buf, "%d", &new_value) != 1) {
798 pr_err("%s: no up delay value specified.\n",
799 bond->dev->name);
800 ret = -EINVAL;
801 goto out;
802 }
803 if (new_value < 0) {
804 pr_err("%s: Invalid up delay value %d not in range %d-%d; rejected.\n",
805 bond->dev->name, new_value, 0, INT_MAX);
806 ret = -EINVAL;
807 goto out;
808 } else {
809 if ((new_value % bond->params.miimon) != 0) {
810 pr_warning("%s: Warning: up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
811 bond->dev->name, new_value,
812 bond->params.miimon,
813 (new_value / bond->params.miimon) *
814 bond->params.miimon);
815 }
816 bond->params.updelay = new_value / bond->params.miimon;
817 pr_info("%s: Setting up delay to %d.\n",
818 bond->dev->name,
819 bond->params.updelay * bond->params.miimon);
820 }
821
822 out:
823 return ret;
824 }
825 static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR,
826 bonding_show_updelay, bonding_store_updelay);
827
828 /*
829 * Show and set the LACP interval. Interface must be down, and the mode
830 * must be set to 802.3ad mode.
831 */
832 static ssize_t bonding_show_lacp(struct device *d,
833 struct device_attribute *attr,
834 char *buf)
835 {
836 struct bonding *bond = to_bond(d);
837
838 return sprintf(buf, "%s %d\n",
839 bond_lacp_tbl[bond->params.lacp_fast].modename,
840 bond->params.lacp_fast);
841 }
842
843 static ssize_t bonding_store_lacp(struct device *d,
844 struct device_attribute *attr,
845 const char *buf, size_t count)
846 {
847 int new_value, ret = count;
848 struct bonding *bond = to_bond(d);
849
850 if (bond->dev->flags & IFF_UP) {
851 pr_err("%s: Unable to update LACP rate because interface is up.\n",
852 bond->dev->name);
853 ret = -EPERM;
854 goto out;
855 }
856
857 if (bond->params.mode != BOND_MODE_8023AD) {
858 pr_err("%s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
859 bond->dev->name);
860 ret = -EPERM;
861 goto out;
862 }
863
864 new_value = bond_parse_parm(buf, bond_lacp_tbl);
865
866 if ((new_value == 1) || (new_value == 0)) {
867 bond->params.lacp_fast = new_value;
868 bond_3ad_update_lacp_rate(bond);
869 pr_info("%s: Setting LACP rate to %s (%d).\n",
870 bond->dev->name, bond_lacp_tbl[new_value].modename,
871 new_value);
872 } else {
873 pr_err("%s: Ignoring invalid LACP rate value %.*s.\n",
874 bond->dev->name, (int)strlen(buf) - 1, buf);
875 ret = -EINVAL;
876 }
877 out:
878 return ret;
879 }
880 static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR,
881 bonding_show_lacp, bonding_store_lacp);
882
883 static ssize_t bonding_show_min_links(struct device *d,
884 struct device_attribute *attr,
885 char *buf)
886 {
887 struct bonding *bond = to_bond(d);
888
889 return sprintf(buf, "%d\n", bond->params.min_links);
890 }
891
892 static ssize_t bonding_store_min_links(struct device *d,
893 struct device_attribute *attr,
894 const char *buf, size_t count)
895 {
896 struct bonding *bond = to_bond(d);
897 int ret;
898 unsigned int new_value;
899
900 ret = kstrtouint(buf, 0, &new_value);
901 if (ret < 0) {
902 pr_err("%s: Ignoring invalid min links value %s.\n",
903 bond->dev->name, buf);
904 return ret;
905 }
906
907 pr_info("%s: Setting min links value to %u\n",
908 bond->dev->name, new_value);
909 bond->params.min_links = new_value;
910 return count;
911 }
912 static DEVICE_ATTR(min_links, S_IRUGO | S_IWUSR,
913 bonding_show_min_links, bonding_store_min_links);
914
915 static ssize_t bonding_show_ad_select(struct device *d,
916 struct device_attribute *attr,
917 char *buf)
918 {
919 struct bonding *bond = to_bond(d);
920
921 return sprintf(buf, "%s %d\n",
922 ad_select_tbl[bond->params.ad_select].modename,
923 bond->params.ad_select);
924 }
925
926
927 static ssize_t bonding_store_ad_select(struct device *d,
928 struct device_attribute *attr,
929 const char *buf, size_t count)
930 {
931 int new_value, ret = count;
932 struct bonding *bond = to_bond(d);
933
934 if (bond->dev->flags & IFF_UP) {
935 pr_err("%s: Unable to update ad_select because interface is up.\n",
936 bond->dev->name);
937 ret = -EPERM;
938 goto out;
939 }
940
941 new_value = bond_parse_parm(buf, ad_select_tbl);
942
943 if (new_value != -1) {
944 bond->params.ad_select = new_value;
945 pr_info("%s: Setting ad_select to %s (%d).\n",
946 bond->dev->name, ad_select_tbl[new_value].modename,
947 new_value);
948 } else {
949 pr_err("%s: Ignoring invalid ad_select value %.*s.\n",
950 bond->dev->name, (int)strlen(buf) - 1, buf);
951 ret = -EINVAL;
952 }
953 out:
954 return ret;
955 }
956 static DEVICE_ATTR(ad_select, S_IRUGO | S_IWUSR,
957 bonding_show_ad_select, bonding_store_ad_select);
958
959 /*
960 * Show and set the number of peer notifications to send after a failover event.
961 */
962 static ssize_t bonding_show_num_peer_notif(struct device *d,
963 struct device_attribute *attr,
964 char *buf)
965 {
966 struct bonding *bond = to_bond(d);
967 return sprintf(buf, "%d\n", bond->params.num_peer_notif);
968 }
969
970 static ssize_t bonding_store_num_peer_notif(struct device *d,
971 struct device_attribute *attr,
972 const char *buf, size_t count)
973 {
974 struct bonding *bond = to_bond(d);
975 int err = kstrtou8(buf, 10, &bond->params.num_peer_notif);
976 return err ? err : count;
977 }
978 static DEVICE_ATTR(num_grat_arp, S_IRUGO | S_IWUSR,
979 bonding_show_num_peer_notif, bonding_store_num_peer_notif);
980 static DEVICE_ATTR(num_unsol_na, S_IRUGO | S_IWUSR,
981 bonding_show_num_peer_notif, bonding_store_num_peer_notif);
982
983 /*
984 * Show and set the MII monitor interval. There are two tricky bits
985 * here. First, if MII monitoring is activated, then we must disable
986 * ARP monitoring. Second, if the timer isn't running, we must
987 * start it.
988 */
989 static ssize_t bonding_show_miimon(struct device *d,
990 struct device_attribute *attr,
991 char *buf)
992 {
993 struct bonding *bond = to_bond(d);
994
995 return sprintf(buf, "%d\n", bond->params.miimon);
996 }
997
998 static ssize_t bonding_store_miimon(struct device *d,
999 struct device_attribute *attr,
1000 const char *buf, size_t count)
1001 {
1002 int new_value, ret = count;
1003 struct bonding *bond = to_bond(d);
1004
1005 if (!rtnl_trylock())
1006 return restart_syscall();
1007 if (sscanf(buf, "%d", &new_value) != 1) {
1008 pr_err("%s: no miimon value specified.\n",
1009 bond->dev->name);
1010 ret = -EINVAL;
1011 goto out;
1012 }
1013 if (new_value < 0) {
1014 pr_err("%s: Invalid miimon value %d not in range %d-%d; rejected.\n",
1015 bond->dev->name, new_value, 0, INT_MAX);
1016 ret = -EINVAL;
1017 goto out;
1018 }
1019 pr_info("%s: Setting MII monitoring interval to %d.\n",
1020 bond->dev->name, new_value);
1021 bond->params.miimon = new_value;
1022 if (bond->params.updelay)
1023 pr_info("%s: Note: Updating updelay (to %d) since it is a multiple of the miimon value.\n",
1024 bond->dev->name,
1025 bond->params.updelay * bond->params.miimon);
1026 if (bond->params.downdelay)
1027 pr_info("%s: Note: Updating downdelay (to %d) since it is a multiple of the miimon value.\n",
1028 bond->dev->name,
1029 bond->params.downdelay * bond->params.miimon);
1030 if (new_value && bond->params.arp_interval) {
1031 pr_info("%s: MII monitoring cannot be used with ARP monitoring. Disabling ARP monitoring...\n",
1032 bond->dev->name);
1033 bond->params.arp_interval = 0;
1034 if (bond->params.arp_validate)
1035 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
1036 }
1037 if (bond->dev->flags & IFF_UP) {
1038 /* If the interface is up, we may need to fire off
1039 * the MII timer. If the interface is down, the
1040 * timer will get fired off when the open function
1041 * is called.
1042 */
1043 if (!new_value) {
1044 cancel_delayed_work_sync(&bond->mii_work);
1045 } else {
1046 cancel_delayed_work_sync(&bond->arp_work);
1047 queue_delayed_work(bond->wq, &bond->mii_work, 0);
1048 }
1049 }
1050 out:
1051 rtnl_unlock();
1052 return ret;
1053 }
1054 static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR,
1055 bonding_show_miimon, bonding_store_miimon);
1056
1057 /*
1058 * Show and set the primary slave. The store function is much
1059 * simpler than bonding_store_slaves function because it only needs to
1060 * handle one interface name.
1061 * The bond must be a mode that supports a primary for this be
1062 * set.
1063 */
1064 static ssize_t bonding_show_primary(struct device *d,
1065 struct device_attribute *attr,
1066 char *buf)
1067 {
1068 int count = 0;
1069 struct bonding *bond = to_bond(d);
1070
1071 if (bond->primary_slave)
1072 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);
1073
1074 return count;
1075 }
1076
1077 static ssize_t bonding_store_primary(struct device *d,
1078 struct device_attribute *attr,
1079 const char *buf, size_t count)
1080 {
1081 int i;
1082 struct slave *slave;
1083 struct bonding *bond = to_bond(d);
1084 char ifname[IFNAMSIZ];
1085
1086 if (!rtnl_trylock())
1087 return restart_syscall();
1088 block_netpoll_tx();
1089 read_lock(&bond->lock);
1090 write_lock_bh(&bond->curr_slave_lock);
1091
1092 if (!USES_PRIMARY(bond->params.mode)) {
1093 pr_info("%s: Unable to set primary slave; %s is in mode %d\n",
1094 bond->dev->name, bond->dev->name, bond->params.mode);
1095 goto out;
1096 }
1097
1098 sscanf(buf, "%15s", ifname); /* IFNAMSIZ */
1099
1100 /* check to see if we are clearing primary */
1101 if (!strlen(ifname) || buf[0] == '\n') {
1102 pr_info("%s: Setting primary slave to None.\n",
1103 bond->dev->name);
1104 bond->primary_slave = NULL;
1105 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1106 bond_select_active_slave(bond);
1107 goto out;
1108 }
1109
1110 bond_for_each_slave(bond, slave, i) {
1111 if (strncmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
1112 pr_info("%s: Setting %s as primary slave.\n",
1113 bond->dev->name, slave->dev->name);
1114 bond->primary_slave = slave;
1115 strcpy(bond->params.primary, slave->dev->name);
1116 bond_select_active_slave(bond);
1117 goto out;
1118 }
1119 }
1120
1121 strncpy(bond->params.primary, ifname, IFNAMSIZ);
1122 bond->params.primary[IFNAMSIZ - 1] = 0;
1123
1124 pr_info("%s: Recording %s as primary, "
1125 "but it has not been enslaved to %s yet.\n",
1126 bond->dev->name, ifname, bond->dev->name);
1127 out:
1128 write_unlock_bh(&bond->curr_slave_lock);
1129 read_unlock(&bond->lock);
1130 unblock_netpoll_tx();
1131 rtnl_unlock();
1132
1133 return count;
1134 }
1135 static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR,
1136 bonding_show_primary, bonding_store_primary);
1137
1138 /*
1139 * Show and set the primary_reselect flag.
1140 */
1141 static ssize_t bonding_show_primary_reselect(struct device *d,
1142 struct device_attribute *attr,
1143 char *buf)
1144 {
1145 struct bonding *bond = to_bond(d);
1146
1147 return sprintf(buf, "%s %d\n",
1148 pri_reselect_tbl[bond->params.primary_reselect].modename,
1149 bond->params.primary_reselect);
1150 }
1151
1152 static ssize_t bonding_store_primary_reselect(struct device *d,
1153 struct device_attribute *attr,
1154 const char *buf, size_t count)
1155 {
1156 int new_value, ret = count;
1157 struct bonding *bond = to_bond(d);
1158
1159 if (!rtnl_trylock())
1160 return restart_syscall();
1161
1162 new_value = bond_parse_parm(buf, pri_reselect_tbl);
1163 if (new_value < 0) {
1164 pr_err("%s: Ignoring invalid primary_reselect value %.*s.\n",
1165 bond->dev->name,
1166 (int) strlen(buf) - 1, buf);
1167 ret = -EINVAL;
1168 goto out;
1169 }
1170
1171 bond->params.primary_reselect = new_value;
1172 pr_info("%s: setting primary_reselect to %s (%d).\n",
1173 bond->dev->name, pri_reselect_tbl[new_value].modename,
1174 new_value);
1175
1176 block_netpoll_tx();
1177 read_lock(&bond->lock);
1178 write_lock_bh(&bond->curr_slave_lock);
1179 bond_select_active_slave(bond);
1180 write_unlock_bh(&bond->curr_slave_lock);
1181 read_unlock(&bond->lock);
1182 unblock_netpoll_tx();
1183 out:
1184 rtnl_unlock();
1185 return ret;
1186 }
1187 static DEVICE_ATTR(primary_reselect, S_IRUGO | S_IWUSR,
1188 bonding_show_primary_reselect,
1189 bonding_store_primary_reselect);
1190
1191 /*
1192 * Show and set the use_carrier flag.
1193 */
1194 static ssize_t bonding_show_carrier(struct device *d,
1195 struct device_attribute *attr,
1196 char *buf)
1197 {
1198 struct bonding *bond = to_bond(d);
1199
1200 return sprintf(buf, "%d\n", bond->params.use_carrier);
1201 }
1202
1203 static ssize_t bonding_store_carrier(struct device *d,
1204 struct device_attribute *attr,
1205 const char *buf, size_t count)
1206 {
1207 int new_value, ret = count;
1208 struct bonding *bond = to_bond(d);
1209
1210
1211 if (sscanf(buf, "%d", &new_value) != 1) {
1212 pr_err("%s: no use_carrier value specified.\n",
1213 bond->dev->name);
1214 ret = -EINVAL;
1215 goto out;
1216 }
1217 if ((new_value == 0) || (new_value == 1)) {
1218 bond->params.use_carrier = new_value;
1219 pr_info("%s: Setting use_carrier to %d.\n",
1220 bond->dev->name, new_value);
1221 } else {
1222 pr_info("%s: Ignoring invalid use_carrier value %d.\n",
1223 bond->dev->name, new_value);
1224 }
1225 out:
1226 return ret;
1227 }
1228 static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR,
1229 bonding_show_carrier, bonding_store_carrier);
1230
1231
1232 /*
1233 * Show and set currently active_slave.
1234 */
1235 static ssize_t bonding_show_active_slave(struct device *d,
1236 struct device_attribute *attr,
1237 char *buf)
1238 {
1239 struct slave *curr;
1240 struct bonding *bond = to_bond(d);
1241 int count = 0;
1242
1243 read_lock(&bond->curr_slave_lock);
1244 curr = bond->curr_active_slave;
1245 read_unlock(&bond->curr_slave_lock);
1246
1247 if (USES_PRIMARY(bond->params.mode) && curr)
1248 count = sprintf(buf, "%s\n", curr->dev->name);
1249 return count;
1250 }
1251
1252 static ssize_t bonding_store_active_slave(struct device *d,
1253 struct device_attribute *attr,
1254 const char *buf, size_t count)
1255 {
1256 int i;
1257 struct slave *slave;
1258 struct slave *old_active = NULL;
1259 struct slave *new_active = NULL;
1260 struct bonding *bond = to_bond(d);
1261 char ifname[IFNAMSIZ];
1262
1263 if (!rtnl_trylock())
1264 return restart_syscall();
1265
1266 block_netpoll_tx();
1267 read_lock(&bond->lock);
1268 write_lock_bh(&bond->curr_slave_lock);
1269
1270 if (!USES_PRIMARY(bond->params.mode)) {
1271 pr_info("%s: Unable to change active slave; %s is in mode %d\n",
1272 bond->dev->name, bond->dev->name, bond->params.mode);
1273 goto out;
1274 }
1275
1276 sscanf(buf, "%15s", ifname); /* IFNAMSIZ */
1277
1278 /* check to see if we are clearing active */
1279 if (!strlen(ifname) || buf[0] == '\n') {
1280 pr_info("%s: Clearing current active slave.\n",
1281 bond->dev->name);
1282 bond->curr_active_slave = NULL;
1283 bond_select_active_slave(bond);
1284 goto out;
1285 }
1286
1287 bond_for_each_slave(bond, slave, i) {
1288 if (strncmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
1289 old_active = bond->curr_active_slave;
1290 new_active = slave;
1291 if (new_active == old_active) {
1292 /* do nothing */
1293 pr_info("%s: %s is already the current"
1294 " active slave.\n",
1295 bond->dev->name,
1296 slave->dev->name);
1297 goto out;
1298 }
1299 else {
1300 if ((new_active) &&
1301 (old_active) &&
1302 (new_active->link == BOND_LINK_UP) &&
1303 IS_UP(new_active->dev)) {
1304 pr_info("%s: Setting %s as active"
1305 " slave.\n",
1306 bond->dev->name,
1307 slave->dev->name);
1308 bond_change_active_slave(bond,
1309 new_active);
1310 }
1311 else {
1312 pr_info("%s: Could not set %s as"
1313 " active slave; either %s is"
1314 " down or the link is down.\n",
1315 bond->dev->name,
1316 slave->dev->name,
1317 slave->dev->name);
1318 }
1319 goto out;
1320 }
1321 }
1322 }
1323
1324 pr_info("%s: Unable to set %.*s as active slave.\n",
1325 bond->dev->name, (int)strlen(buf) - 1, buf);
1326 out:
1327 write_unlock_bh(&bond->curr_slave_lock);
1328 read_unlock(&bond->lock);
1329 unblock_netpoll_tx();
1330
1331 rtnl_unlock();
1332
1333 return count;
1334
1335 }
1336 static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR,
1337 bonding_show_active_slave, bonding_store_active_slave);
1338
1339
1340 /*
1341 * Show link status of the bond interface.
1342 */
1343 static ssize_t bonding_show_mii_status(struct device *d,
1344 struct device_attribute *attr,
1345 char *buf)
1346 {
1347 struct slave *curr;
1348 struct bonding *bond = to_bond(d);
1349
1350 read_lock(&bond->curr_slave_lock);
1351 curr = bond->curr_active_slave;
1352 read_unlock(&bond->curr_slave_lock);
1353
1354 return sprintf(buf, "%s\n", curr ? "up" : "down");
1355 }
1356 static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1357
1358 /*
1359 * Show current 802.3ad aggregator ID.
1360 */
1361 static ssize_t bonding_show_ad_aggregator(struct device *d,
1362 struct device_attribute *attr,
1363 char *buf)
1364 {
1365 int count = 0;
1366 struct bonding *bond = to_bond(d);
1367
1368 if (bond->params.mode == BOND_MODE_8023AD) {
1369 struct ad_info ad_info;
1370 count = sprintf(buf, "%d\n",
1371 bond_3ad_get_active_agg_info(bond, &ad_info)
1372 ? 0 : ad_info.aggregator_id);
1373 }
1374
1375 return count;
1376 }
1377 static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1378
1379
1380 /*
1381 * Show number of active 802.3ad ports.
1382 */
1383 static ssize_t bonding_show_ad_num_ports(struct device *d,
1384 struct device_attribute *attr,
1385 char *buf)
1386 {
1387 int count = 0;
1388 struct bonding *bond = to_bond(d);
1389
1390 if (bond->params.mode == BOND_MODE_8023AD) {
1391 struct ad_info ad_info;
1392 count = sprintf(buf, "%d\n",
1393 bond_3ad_get_active_agg_info(bond, &ad_info)
1394 ? 0 : ad_info.ports);
1395 }
1396
1397 return count;
1398 }
1399 static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1400
1401
1402 /*
1403 * Show current 802.3ad actor key.
1404 */
1405 static ssize_t bonding_show_ad_actor_key(struct device *d,
1406 struct device_attribute *attr,
1407 char *buf)
1408 {
1409 int count = 0;
1410 struct bonding *bond = to_bond(d);
1411
1412 if (bond->params.mode == BOND_MODE_8023AD) {
1413 struct ad_info ad_info;
1414 count = sprintf(buf, "%d\n",
1415 bond_3ad_get_active_agg_info(bond, &ad_info)
1416 ? 0 : ad_info.actor_key);
1417 }
1418
1419 return count;
1420 }
1421 static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1422
1423
1424 /*
1425 * Show current 802.3ad partner key.
1426 */
1427 static ssize_t bonding_show_ad_partner_key(struct device *d,
1428 struct device_attribute *attr,
1429 char *buf)
1430 {
1431 int count = 0;
1432 struct bonding *bond = to_bond(d);
1433
1434 if (bond->params.mode == BOND_MODE_8023AD) {
1435 struct ad_info ad_info;
1436 count = sprintf(buf, "%d\n",
1437 bond_3ad_get_active_agg_info(bond, &ad_info)
1438 ? 0 : ad_info.partner_key);
1439 }
1440
1441 return count;
1442 }
1443 static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1444
1445
1446 /*
1447 * Show current 802.3ad partner mac.
1448 */
1449 static ssize_t bonding_show_ad_partner_mac(struct device *d,
1450 struct device_attribute *attr,
1451 char *buf)
1452 {
1453 int count = 0;
1454 struct bonding *bond = to_bond(d);
1455
1456 if (bond->params.mode == BOND_MODE_8023AD) {
1457 struct ad_info ad_info;
1458 if (!bond_3ad_get_active_agg_info(bond, &ad_info))
1459 count = sprintf(buf, "%pM\n", ad_info.partner_system);
1460 }
1461
1462 return count;
1463 }
1464 static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1465
1466 /*
1467 * Show the queue_ids of the slaves in the current bond.
1468 */
1469 static ssize_t bonding_show_queue_id(struct device *d,
1470 struct device_attribute *attr,
1471 char *buf)
1472 {
1473 struct slave *slave;
1474 int i, res = 0;
1475 struct bonding *bond = to_bond(d);
1476
1477 if (!rtnl_trylock())
1478 return restart_syscall();
1479
1480 read_lock(&bond->lock);
1481 bond_for_each_slave(bond, slave, i) {
1482 if (res > (PAGE_SIZE - IFNAMSIZ - 6)) {
1483 /* not enough space for another interface_name:queue_id pair */
1484 if ((PAGE_SIZE - res) > 10)
1485 res = PAGE_SIZE - 10;
1486 res += sprintf(buf + res, "++more++ ");
1487 break;
1488 }
1489 res += sprintf(buf + res, "%s:%d ",
1490 slave->dev->name, slave->queue_id);
1491 }
1492 read_unlock(&bond->lock);
1493 if (res)
1494 buf[res-1] = '\n'; /* eat the leftover space */
1495 rtnl_unlock();
1496 return res;
1497 }
1498
1499 /*
1500 * Set the queue_ids of the slaves in the current bond. The bond
1501 * interface must be enslaved for this to work.
1502 */
1503 static ssize_t bonding_store_queue_id(struct device *d,
1504 struct device_attribute *attr,
1505 const char *buffer, size_t count)
1506 {
1507 struct slave *slave, *update_slave;
1508 struct bonding *bond = to_bond(d);
1509 u16 qid;
1510 int i, ret = count;
1511 char *delim;
1512 struct net_device *sdev = NULL;
1513
1514 if (!rtnl_trylock())
1515 return restart_syscall();
1516
1517 /* delim will point to queue id if successful */
1518 delim = strchr(buffer, ':');
1519 if (!delim)
1520 goto err_no_cmd;
1521
1522 /*
1523 * Terminate string that points to device name and bump it
1524 * up one, so we can read the queue id there.
1525 */
1526 *delim = '\0';
1527 if (sscanf(++delim, "%hd\n", &qid) != 1)
1528 goto err_no_cmd;
1529
1530 /* Check buffer length, valid ifname and queue id */
1531 if (strlen(buffer) > IFNAMSIZ ||
1532 !dev_valid_name(buffer) ||
1533 qid > bond->dev->real_num_tx_queues)
1534 goto err_no_cmd;
1535
1536 /* Get the pointer to that interface if it exists */
1537 sdev = __dev_get_by_name(dev_net(bond->dev), buffer);
1538 if (!sdev)
1539 goto err_no_cmd;
1540
1541 read_lock(&bond->lock);
1542
1543 /* Search for thes slave and check for duplicate qids */
1544 update_slave = NULL;
1545 bond_for_each_slave(bond, slave, i) {
1546 if (sdev == slave->dev)
1547 /*
1548 * We don't need to check the matching
1549 * slave for dups, since we're overwriting it
1550 */
1551 update_slave = slave;
1552 else if (qid && qid == slave->queue_id) {
1553 goto err_no_cmd_unlock;
1554 }
1555 }
1556
1557 if (!update_slave)
1558 goto err_no_cmd_unlock;
1559
1560 /* Actually set the qids for the slave */
1561 update_slave->queue_id = qid;
1562
1563 read_unlock(&bond->lock);
1564 out:
1565 rtnl_unlock();
1566 return ret;
1567
1568 err_no_cmd_unlock:
1569 read_unlock(&bond->lock);
1570 err_no_cmd:
1571 pr_info("invalid input for queue_id set for %s.\n",
1572 bond->dev->name);
1573 ret = -EPERM;
1574 goto out;
1575 }
1576
1577 static DEVICE_ATTR(queue_id, S_IRUGO | S_IWUSR, bonding_show_queue_id,
1578 bonding_store_queue_id);
1579
1580
1581 /*
1582 * Show and set the all_slaves_active flag.
1583 */
1584 static ssize_t bonding_show_slaves_active(struct device *d,
1585 struct device_attribute *attr,
1586 char *buf)
1587 {
1588 struct bonding *bond = to_bond(d);
1589
1590 return sprintf(buf, "%d\n", bond->params.all_slaves_active);
1591 }
1592
1593 static ssize_t bonding_store_slaves_active(struct device *d,
1594 struct device_attribute *attr,
1595 const char *buf, size_t count)
1596 {
1597 int i, new_value, ret = count;
1598 struct bonding *bond = to_bond(d);
1599 struct slave *slave;
1600
1601 if (sscanf(buf, "%d", &new_value) != 1) {
1602 pr_err("%s: no all_slaves_active value specified.\n",
1603 bond->dev->name);
1604 ret = -EINVAL;
1605 goto out;
1606 }
1607
1608 if (new_value == bond->params.all_slaves_active)
1609 goto out;
1610
1611 if ((new_value == 0) || (new_value == 1)) {
1612 bond->params.all_slaves_active = new_value;
1613 } else {
1614 pr_info("%s: Ignoring invalid all_slaves_active value %d.\n",
1615 bond->dev->name, new_value);
1616 ret = -EINVAL;
1617 goto out;
1618 }
1619
1620 read_lock(&bond->lock);
1621 bond_for_each_slave(bond, slave, i) {
1622 if (!bond_is_active_slave(slave)) {
1623 if (new_value)
1624 slave->inactive = 0;
1625 else
1626 slave->inactive = 1;
1627 }
1628 }
1629 read_unlock(&bond->lock);
1630 out:
1631 return ret;
1632 }
1633 static DEVICE_ATTR(all_slaves_active, S_IRUGO | S_IWUSR,
1634 bonding_show_slaves_active, bonding_store_slaves_active);
1635
1636 /*
1637 * Show and set the number of IGMP membership reports to send on link failure
1638 */
1639 static ssize_t bonding_show_resend_igmp(struct device *d,
1640 struct device_attribute *attr,
1641 char *buf)
1642 {
1643 struct bonding *bond = to_bond(d);
1644
1645 return sprintf(buf, "%d\n", bond->params.resend_igmp);
1646 }
1647
1648 static ssize_t bonding_store_resend_igmp(struct device *d,
1649 struct device_attribute *attr,
1650 const char *buf, size_t count)
1651 {
1652 int new_value, ret = count;
1653 struct bonding *bond = to_bond(d);
1654
1655 if (sscanf(buf, "%d", &new_value) != 1) {
1656 pr_err("%s: no resend_igmp value specified.\n",
1657 bond->dev->name);
1658 ret = -EINVAL;
1659 goto out;
1660 }
1661
1662 if (new_value < 0 || new_value > 255) {
1663 pr_err("%s: Invalid resend_igmp value %d not in range 0-255; rejected.\n",
1664 bond->dev->name, new_value);
1665 ret = -EINVAL;
1666 goto out;
1667 }
1668
1669 pr_info("%s: Setting resend_igmp to %d.\n",
1670 bond->dev->name, new_value);
1671 bond->params.resend_igmp = new_value;
1672 out:
1673 return ret;
1674 }
1675
1676 static DEVICE_ATTR(resend_igmp, S_IRUGO | S_IWUSR,
1677 bonding_show_resend_igmp, bonding_store_resend_igmp);
1678
1679 static struct attribute *per_bond_attrs[] = {
1680 &dev_attr_slaves.attr,
1681 &dev_attr_mode.attr,
1682 &dev_attr_fail_over_mac.attr,
1683 &dev_attr_arp_validate.attr,
1684 &dev_attr_arp_all_targets.attr,
1685 &dev_attr_arp_interval.attr,
1686 &dev_attr_arp_ip_target.attr,
1687 &dev_attr_downdelay.attr,
1688 &dev_attr_updelay.attr,
1689 &dev_attr_lacp_rate.attr,
1690 &dev_attr_ad_select.attr,
1691 &dev_attr_xmit_hash_policy.attr,
1692 &dev_attr_num_grat_arp.attr,
1693 &dev_attr_num_unsol_na.attr,
1694 &dev_attr_miimon.attr,
1695 &dev_attr_primary.attr,
1696 &dev_attr_primary_reselect.attr,
1697 &dev_attr_use_carrier.attr,
1698 &dev_attr_active_slave.attr,
1699 &dev_attr_mii_status.attr,
1700 &dev_attr_ad_aggregator.attr,
1701 &dev_attr_ad_num_ports.attr,
1702 &dev_attr_ad_actor_key.attr,
1703 &dev_attr_ad_partner_key.attr,
1704 &dev_attr_ad_partner_mac.attr,
1705 &dev_attr_queue_id.attr,
1706 &dev_attr_all_slaves_active.attr,
1707 &dev_attr_resend_igmp.attr,
1708 &dev_attr_min_links.attr,
1709 NULL,
1710 };
1711
1712 static struct attribute_group bonding_group = {
1713 .name = "bonding",
1714 .attrs = per_bond_attrs,
1715 };
1716
1717 /*
1718 * Initialize sysfs. This sets up the bonding_masters file in
1719 * /sys/class/net.
1720 */
1721 int bond_create_sysfs(struct bond_net *bn)
1722 {
1723 int ret;
1724
1725 bn->class_attr_bonding_masters = class_attr_bonding_masters;
1726 sysfs_attr_init(&bn->class_attr_bonding_masters.attr);
1727
1728 ret = netdev_class_create_file(&bn->class_attr_bonding_masters);
1729 /*
1730 * Permit multiple loads of the module by ignoring failures to
1731 * create the bonding_masters sysfs file. Bonding devices
1732 * created by second or subsequent loads of the module will
1733 * not be listed in, or controllable by, bonding_masters, but
1734 * will have the usual "bonding" sysfs directory.
1735 *
1736 * This is done to preserve backwards compatibility for
1737 * initscripts/sysconfig, which load bonding multiple times to
1738 * configure multiple bonding devices.
1739 */
1740 if (ret == -EEXIST) {
1741 /* Is someone being kinky and naming a device bonding_master? */
1742 if (__dev_get_by_name(bn->net,
1743 class_attr_bonding_masters.attr.name))
1744 pr_err("network device named %s already exists in sysfs",
1745 class_attr_bonding_masters.attr.name);
1746 ret = 0;
1747 }
1748
1749 return ret;
1750
1751 }
1752
1753 /*
1754 * Remove /sys/class/net/bonding_masters.
1755 */
1756 void bond_destroy_sysfs(struct bond_net *bn)
1757 {
1758 netdev_class_remove_file(&bn->class_attr_bonding_masters);
1759 }
1760
1761 /*
1762 * Initialize sysfs for each bond. This sets up and registers
1763 * the 'bondctl' directory for each individual bond under /sys/class/net.
1764 */
1765 void bond_prepare_sysfs_group(struct bonding *bond)
1766 {
1767 bond->dev->sysfs_groups[0] = &bonding_group;
1768 }
1769
Linus' kernel tree