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Merge branch 'for_3.8-rc1' into v4l_for_linus
[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 return ret;
187
188 }
189
190 void bond_destroy_slave_symlinks(struct net_device *master,
191 struct net_device *slave)
192 {
193 char linkname[IFNAMSIZ+7];
194
195 sysfs_remove_link(&(slave->dev.kobj), "master");
196 sprintf(linkname, "slave_%s", slave->name);
197 sysfs_remove_link(&(master->dev.kobj), linkname);
198 }
199
200
201 /*
202 * Show the slaves in the current bond.
203 */
204 static ssize_t bonding_show_slaves(struct device *d,
205 struct device_attribute *attr, char *buf)
206 {
207 struct slave *slave;
208 int i, res = 0;
209 struct bonding *bond = to_bond(d);
210
211 read_lock(&bond->lock);
212 bond_for_each_slave(bond, slave, i) {
213 if (res > (PAGE_SIZE - IFNAMSIZ)) {
214 /* not enough space for another interface name */
215 if ((PAGE_SIZE - res) > 10)
216 res = PAGE_SIZE - 10;
217 res += sprintf(buf + res, "++more++ ");
218 break;
219 }
220 res += sprintf(buf + res, "%s ", slave->dev->name);
221 }
222 read_unlock(&bond->lock);
223 if (res)
224 buf[res-1] = '\n'; /* eat the leftover space */
225 return res;
226 }
227
228 /*
229 * Set the slaves in the current bond. The bond interface must be
230 * up for this to succeed.
231 * This is supposed to be only thin wrapper for bond_enslave and bond_release.
232 * All hard work should be done there.
233 */
234 static ssize_t bonding_store_slaves(struct device *d,
235 struct device_attribute *attr,
236 const char *buffer, size_t count)
237 {
238 char command[IFNAMSIZ + 1] = { 0, };
239 char *ifname;
240 int res, ret = count;
241 struct net_device *dev;
242 struct bonding *bond = to_bond(d);
243
244 if (!rtnl_trylock())
245 return restart_syscall();
246
247 sscanf(buffer, "%16s", command); /* IFNAMSIZ*/
248 ifname = command + 1;
249 if ((strlen(command) <= 1) ||
250 !dev_valid_name(ifname))
251 goto err_no_cmd;
252
253 dev = __dev_get_by_name(dev_net(bond->dev), ifname);
254 if (!dev) {
255 pr_info("%s: Interface %s does not exist!\n",
256 bond->dev->name, ifname);
257 ret = -ENODEV;
258 goto out;
259 }
260
261 switch (command[0]) {
262 case '+':
263 pr_info("%s: Adding slave %s.\n", bond->dev->name, dev->name);
264 res = bond_enslave(bond->dev, dev);
265 break;
266
267 case '-':
268 pr_info("%s: Removing slave %s.\n", bond->dev->name, dev->name);
269 res = bond_release(bond->dev, dev);
270 break;
271
272 default:
273 goto err_no_cmd;
274 }
275
276 if (res)
277 ret = res;
278 goto out;
279
280 err_no_cmd:
281 pr_err("no command found in slaves file for bond %s. Use +ifname or -ifname.\n",
282 bond->dev->name);
283 ret = -EPERM;
284
285 out:
286 rtnl_unlock();
287 return ret;
288 }
289
290 static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves,
291 bonding_store_slaves);
292
293 /*
294 * Show and set the bonding mode. The bond interface must be down to
295 * change the mode.
296 */
297 static ssize_t bonding_show_mode(struct device *d,
298 struct device_attribute *attr, char *buf)
299 {
300 struct bonding *bond = to_bond(d);
301
302 return sprintf(buf, "%s %d\n",
303 bond_mode_tbl[bond->params.mode].modename,
304 bond->params.mode);
305 }
306
307 static ssize_t bonding_store_mode(struct device *d,
308 struct device_attribute *attr,
309 const char *buf, size_t count)
310 {
311 int new_value, ret = count;
312 struct bonding *bond = to_bond(d);
313
314 if (bond->dev->flags & IFF_UP) {
315 pr_err("unable to update mode of %s because interface is up.\n",
316 bond->dev->name);
317 ret = -EPERM;
318 goto out;
319 }
320
321 if (bond->slave_cnt > 0) {
322 pr_err("unable to update mode of %s because it has slaves.\n",
323 bond->dev->name);
324 ret = -EPERM;
325 goto out;
326 }
327
328 new_value = bond_parse_parm(buf, bond_mode_tbl);
329 if (new_value < 0) {
330 pr_err("%s: Ignoring invalid mode value %.*s.\n",
331 bond->dev->name, (int)strlen(buf) - 1, buf);
332 ret = -EINVAL;
333 goto out;
334 }
335 if ((new_value == BOND_MODE_ALB ||
336 new_value == BOND_MODE_TLB) &&
337 bond->params.arp_interval) {
338 pr_err("%s: %s mode is incompatible with arp monitoring.\n",
339 bond->dev->name, bond_mode_tbl[new_value].modename);
340 ret = -EINVAL;
341 goto out;
342 }
343
344 bond->params.mode = new_value;
345 bond_set_mode_ops(bond, bond->params.mode);
346 pr_info("%s: setting mode to %s (%d).\n",
347 bond->dev->name, bond_mode_tbl[new_value].modename,
348 new_value);
349 out:
350 return ret;
351 }
352 static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,
353 bonding_show_mode, bonding_store_mode);
354
355 /*
356 * Show and set the bonding transmit hash method.
357 * The bond interface must be down to change the xmit hash policy.
358 */
359 static ssize_t bonding_show_xmit_hash(struct device *d,
360 struct device_attribute *attr,
361 char *buf)
362 {
363 struct bonding *bond = to_bond(d);
364
365 return sprintf(buf, "%s %d\n",
366 xmit_hashtype_tbl[bond->params.xmit_policy].modename,
367 bond->params.xmit_policy);
368 }
369
370 static ssize_t bonding_store_xmit_hash(struct device *d,
371 struct device_attribute *attr,
372 const char *buf, size_t count)
373 {
374 int new_value, ret = count;
375 struct bonding *bond = to_bond(d);
376
377 if (bond->dev->flags & IFF_UP) {
378 pr_err("%s: Interface is up. Unable to update xmit policy.\n",
379 bond->dev->name);
380 ret = -EPERM;
381 goto out;
382 }
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 goto out;
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 out:
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 /*
449 * Show and store fail_over_mac. User only allowed to change the
450 * value when there are no slaves.
451 */
452 static ssize_t bonding_show_fail_over_mac(struct device *d,
453 struct device_attribute *attr,
454 char *buf)
455 {
456 struct bonding *bond = to_bond(d);
457
458 return sprintf(buf, "%s %d\n",
459 fail_over_mac_tbl[bond->params.fail_over_mac].modename,
460 bond->params.fail_over_mac);
461 }
462
463 static ssize_t bonding_store_fail_over_mac(struct device *d,
464 struct device_attribute *attr,
465 const char *buf, size_t count)
466 {
467 int new_value;
468 struct bonding *bond = to_bond(d);
469
470 if (bond->slave_cnt != 0) {
471 pr_err("%s: Can't alter fail_over_mac with slaves in bond.\n",
472 bond->dev->name);
473 return -EPERM;
474 }
475
476 new_value = bond_parse_parm(buf, fail_over_mac_tbl);
477 if (new_value < 0) {
478 pr_err("%s: Ignoring invalid fail_over_mac value %s.\n",
479 bond->dev->name, buf);
480 return -EINVAL;
481 }
482
483 bond->params.fail_over_mac = new_value;
484 pr_info("%s: Setting fail_over_mac to %s (%d).\n",
485 bond->dev->name, fail_over_mac_tbl[new_value].modename,
486 new_value);
487
488 return count;
489 }
490
491 static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR,
492 bonding_show_fail_over_mac, bonding_store_fail_over_mac);
493
494 /*
495 * Show and set the arp timer interval. There are two tricky bits
496 * here. First, if ARP monitoring is activated, then we must disable
497 * MII monitoring. Second, if the ARP timer isn't running, we must
498 * start it.
499 */
500 static ssize_t bonding_show_arp_interval(struct device *d,
501 struct device_attribute *attr,
502 char *buf)
503 {
504 struct bonding *bond = to_bond(d);
505
506 return sprintf(buf, "%d\n", bond->params.arp_interval);
507 }
508
509 static ssize_t bonding_store_arp_interval(struct device *d,
510 struct device_attribute *attr,
511 const char *buf, size_t count)
512 {
513 int new_value, ret = count;
514 struct bonding *bond = to_bond(d);
515
516 if (!rtnl_trylock())
517 return restart_syscall();
518 if (sscanf(buf, "%d", &new_value) != 1) {
519 pr_err("%s: no arp_interval value specified.\n",
520 bond->dev->name);
521 ret = -EINVAL;
522 goto out;
523 }
524 if (new_value < 0) {
525 pr_err("%s: Invalid arp_interval value %d not in range 1-%d; rejected.\n",
526 bond->dev->name, new_value, INT_MAX);
527 ret = -EINVAL;
528 goto out;
529 }
530 if (bond->params.mode == BOND_MODE_ALB ||
531 bond->params.mode == BOND_MODE_TLB) {
532 pr_info("%s: ARP monitoring cannot be used with ALB/TLB. Only MII monitoring is supported on %s.\n",
533 bond->dev->name, bond->dev->name);
534 ret = -EINVAL;
535 goto out;
536 }
537 pr_info("%s: Setting ARP monitoring interval to %d.\n",
538 bond->dev->name, new_value);
539 bond->params.arp_interval = new_value;
540 if (bond->params.miimon) {
541 pr_info("%s: ARP monitoring cannot be used with MII monitoring. %s Disabling MII monitoring.\n",
542 bond->dev->name, bond->dev->name);
543 bond->params.miimon = 0;
544 }
545 if (!bond->params.arp_targets[0]) {
546 pr_info("%s: ARP monitoring has been set up, but no ARP targets have been specified.\n",
547 bond->dev->name);
548 }
549 if (bond->dev->flags & IFF_UP) {
550 /* If the interface is up, we may need to fire off
551 * the ARP timer. If the interface is down, the
552 * timer will get fired off when the open function
553 * is called.
554 */
555 cancel_delayed_work_sync(&bond->mii_work);
556 queue_delayed_work(bond->wq, &bond->arp_work, 0);
557 }
558
559 out:
560 rtnl_unlock();
561 return ret;
562 }
563 static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR,
564 bonding_show_arp_interval, bonding_store_arp_interval);
565
566 /*
567 * Show and set the arp targets.
568 */
569 static ssize_t bonding_show_arp_targets(struct device *d,
570 struct device_attribute *attr,
571 char *buf)
572 {
573 int i, res = 0;
574 struct bonding *bond = to_bond(d);
575
576 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
577 if (bond->params.arp_targets[i])
578 res += sprintf(buf + res, "%pI4 ",
579 &bond->params.arp_targets[i]);
580 }
581 if (res)
582 buf[res-1] = '\n'; /* eat the leftover space */
583 return res;
584 }
585
586 static ssize_t bonding_store_arp_targets(struct device *d,
587 struct device_attribute *attr,
588 const char *buf, size_t count)
589 {
590 __be32 newtarget;
591 int i = 0, done = 0, ret = count;
592 struct bonding *bond = to_bond(d);
593 __be32 *targets;
594
595 targets = bond->params.arp_targets;
596 newtarget = in_aton(buf + 1);
597 /* look for adds */
598 if (buf[0] == '+') {
599 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
600 pr_err("%s: invalid ARP target %pI4 specified for addition\n",
601 bond->dev->name, &newtarget);
602 ret = -EINVAL;
603 goto out;
604 }
605 /* look for an empty slot to put the target in, and check for dupes */
606 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
607 if (targets[i] == newtarget) { /* duplicate */
608 pr_err("%s: ARP target %pI4 is already present\n",
609 bond->dev->name, &newtarget);
610 ret = -EINVAL;
611 goto out;
612 }
613 if (targets[i] == 0) {
614 pr_info("%s: adding ARP target %pI4.\n",
615 bond->dev->name, &newtarget);
616 done = 1;
617 targets[i] = newtarget;
618 }
619 }
620 if (!done) {
621 pr_err("%s: ARP target table is full!\n",
622 bond->dev->name);
623 ret = -EINVAL;
624 goto out;
625 }
626
627 } else if (buf[0] == '-') {
628 if ((newtarget == 0) || (newtarget == htonl(INADDR_BROADCAST))) {
629 pr_err("%s: invalid ARP target %pI4 specified for removal\n",
630 bond->dev->name, &newtarget);
631 ret = -EINVAL;
632 goto out;
633 }
634
635 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && !done; i++) {
636 if (targets[i] == newtarget) {
637 int j;
638 pr_info("%s: removing ARP target %pI4.\n",
639 bond->dev->name, &newtarget);
640 for (j = i; (j < (BOND_MAX_ARP_TARGETS-1)) && targets[j+1]; j++)
641 targets[j] = targets[j+1];
642
643 targets[j] = 0;
644 done = 1;
645 }
646 }
647 if (!done) {
648 pr_info("%s: unable to remove nonexistent ARP target %pI4.\n",
649 bond->dev->name, &newtarget);
650 ret = -EINVAL;
651 goto out;
652 }
653 } else {
654 pr_err("no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
655 bond->dev->name);
656 ret = -EPERM;
657 goto out;
658 }
659
660 out:
661 return ret;
662 }
663 static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR , bonding_show_arp_targets, bonding_store_arp_targets);
664
665 /*
666 * Show and set the up and down delays. These must be multiples of the
667 * MII monitoring value, and are stored internally as the multiplier.
668 * Thus, we must translate to MS for the real world.
669 */
670 static ssize_t bonding_show_downdelay(struct device *d,
671 struct device_attribute *attr,
672 char *buf)
673 {
674 struct bonding *bond = to_bond(d);
675
676 return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
677 }
678
679 static ssize_t bonding_store_downdelay(struct device *d,
680 struct device_attribute *attr,
681 const char *buf, size_t count)
682 {
683 int new_value, ret = count;
684 struct bonding *bond = to_bond(d);
685
686 if (!(bond->params.miimon)) {
687 pr_err("%s: Unable to set down delay as MII monitoring is disabled\n",
688 bond->dev->name);
689 ret = -EPERM;
690 goto out;
691 }
692
693 if (sscanf(buf, "%d", &new_value) != 1) {
694 pr_err("%s: no down delay value specified.\n", bond->dev->name);
695 ret = -EINVAL;
696 goto out;
697 }
698 if (new_value < 0) {
699 pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n",
700 bond->dev->name, new_value, 1, INT_MAX);
701 ret = -EINVAL;
702 goto out;
703 } else {
704 if ((new_value % bond->params.miimon) != 0) {
705 pr_warning("%s: Warning: down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
706 bond->dev->name, new_value,
707 bond->params.miimon,
708 (new_value / bond->params.miimon) *
709 bond->params.miimon);
710 }
711 bond->params.downdelay = new_value / bond->params.miimon;
712 pr_info("%s: Setting down delay to %d.\n",
713 bond->dev->name,
714 bond->params.downdelay * bond->params.miimon);
715
716 }
717
718 out:
719 return ret;
720 }
721 static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR,
722 bonding_show_downdelay, bonding_store_downdelay);
723
724 static ssize_t bonding_show_updelay(struct device *d,
725 struct device_attribute *attr,
726 char *buf)
727 {
728 struct bonding *bond = to_bond(d);
729
730 return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
731
732 }
733
734 static ssize_t bonding_store_updelay(struct device *d,
735 struct device_attribute *attr,
736 const char *buf, size_t count)
737 {
738 int new_value, ret = count;
739 struct bonding *bond = to_bond(d);
740
741 if (!(bond->params.miimon)) {
742 pr_err("%s: Unable to set up delay as MII monitoring is disabled\n",
743 bond->dev->name);
744 ret = -EPERM;
745 goto out;
746 }
747
748 if (sscanf(buf, "%d", &new_value) != 1) {
749 pr_err("%s: no up delay value specified.\n",
750 bond->dev->name);
751 ret = -EINVAL;
752 goto out;
753 }
754 if (new_value < 0) {
755 pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n",
756 bond->dev->name, new_value, 1, INT_MAX);
757 ret = -EINVAL;
758 goto out;
759 } else {
760 if ((new_value % bond->params.miimon) != 0) {
761 pr_warning("%s: Warning: up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
762 bond->dev->name, new_value,
763 bond->params.miimon,
764 (new_value / bond->params.miimon) *
765 bond->params.miimon);
766 }
767 bond->params.updelay = new_value / bond->params.miimon;
768 pr_info("%s: Setting up delay to %d.\n",
769 bond->dev->name,
770 bond->params.updelay * bond->params.miimon);
771 }
772
773 out:
774 return ret;
775 }
776 static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR,
777 bonding_show_updelay, bonding_store_updelay);
778
779 /*
780 * Show and set the LACP interval. Interface must be down, and the mode
781 * must be set to 802.3ad mode.
782 */
783 static ssize_t bonding_show_lacp(struct device *d,
784 struct device_attribute *attr,
785 char *buf)
786 {
787 struct bonding *bond = to_bond(d);
788
789 return sprintf(buf, "%s %d\n",
790 bond_lacp_tbl[bond->params.lacp_fast].modename,
791 bond->params.lacp_fast);
792 }
793
794 static ssize_t bonding_store_lacp(struct device *d,
795 struct device_attribute *attr,
796 const char *buf, size_t count)
797 {
798 int new_value, ret = count;
799 struct bonding *bond = to_bond(d);
800
801 if (bond->dev->flags & IFF_UP) {
802 pr_err("%s: Unable to update LACP rate because interface is up.\n",
803 bond->dev->name);
804 ret = -EPERM;
805 goto out;
806 }
807
808 if (bond->params.mode != BOND_MODE_8023AD) {
809 pr_err("%s: Unable to update LACP rate because bond is not in 802.3ad mode.\n",
810 bond->dev->name);
811 ret = -EPERM;
812 goto out;
813 }
814
815 new_value = bond_parse_parm(buf, bond_lacp_tbl);
816
817 if ((new_value == 1) || (new_value == 0)) {
818 bond->params.lacp_fast = new_value;
819 bond_3ad_update_lacp_rate(bond);
820 pr_info("%s: Setting LACP rate to %s (%d).\n",
821 bond->dev->name, bond_lacp_tbl[new_value].modename,
822 new_value);
823 } else {
824 pr_err("%s: Ignoring invalid LACP rate value %.*s.\n",
825 bond->dev->name, (int)strlen(buf) - 1, buf);
826 ret = -EINVAL;
827 }
828 out:
829 return ret;
830 }
831 static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR,
832 bonding_show_lacp, bonding_store_lacp);
833
834 static ssize_t bonding_show_min_links(struct device *d,
835 struct device_attribute *attr,
836 char *buf)
837 {
838 struct bonding *bond = to_bond(d);
839
840 return sprintf(buf, "%d\n", bond->params.min_links);
841 }
842
843 static ssize_t bonding_store_min_links(struct device *d,
844 struct device_attribute *attr,
845 const char *buf, size_t count)
846 {
847 struct bonding *bond = to_bond(d);
848 int ret;
849 unsigned int new_value;
850
851 ret = kstrtouint(buf, 0, &new_value);
852 if (ret < 0) {
853 pr_err("%s: Ignoring invalid min links value %s.\n",
854 bond->dev->name, buf);
855 return ret;
856 }
857
858 pr_info("%s: Setting min links value to %u\n",
859 bond->dev->name, new_value);
860 bond->params.min_links = new_value;
861 return count;
862 }
863 static DEVICE_ATTR(min_links, S_IRUGO | S_IWUSR,
864 bonding_show_min_links, bonding_store_min_links);
865
866 static ssize_t bonding_show_ad_select(struct device *d,
867 struct device_attribute *attr,
868 char *buf)
869 {
870 struct bonding *bond = to_bond(d);
871
872 return sprintf(buf, "%s %d\n",
873 ad_select_tbl[bond->params.ad_select].modename,
874 bond->params.ad_select);
875 }
876
877
878 static ssize_t bonding_store_ad_select(struct device *d,
879 struct device_attribute *attr,
880 const char *buf, size_t count)
881 {
882 int new_value, ret = count;
883 struct bonding *bond = to_bond(d);
884
885 if (bond->dev->flags & IFF_UP) {
886 pr_err("%s: Unable to update ad_select because interface is up.\n",
887 bond->dev->name);
888 ret = -EPERM;
889 goto out;
890 }
891
892 new_value = bond_parse_parm(buf, ad_select_tbl);
893
894 if (new_value != -1) {
895 bond->params.ad_select = new_value;
896 pr_info("%s: Setting ad_select to %s (%d).\n",
897 bond->dev->name, ad_select_tbl[new_value].modename,
898 new_value);
899 } else {
900 pr_err("%s: Ignoring invalid ad_select value %.*s.\n",
901 bond->dev->name, (int)strlen(buf) - 1, buf);
902 ret = -EINVAL;
903 }
904 out:
905 return ret;
906 }
907 static DEVICE_ATTR(ad_select, S_IRUGO | S_IWUSR,
908 bonding_show_ad_select, bonding_store_ad_select);
909
910 /*
911 * Show and set the number of peer notifications to send after a failover event.
912 */
913 static ssize_t bonding_show_num_peer_notif(struct device *d,
914 struct device_attribute *attr,
915 char *buf)
916 {
917 struct bonding *bond = to_bond(d);
918 return sprintf(buf, "%d\n", bond->params.num_peer_notif);
919 }
920
921 static ssize_t bonding_store_num_peer_notif(struct device *d,
922 struct device_attribute *attr,
923 const char *buf, size_t count)
924 {
925 struct bonding *bond = to_bond(d);
926 int err = kstrtou8(buf, 10, &bond->params.num_peer_notif);
927 return err ? err : count;
928 }
929 static DEVICE_ATTR(num_grat_arp, S_IRUGO | S_IWUSR,
930 bonding_show_num_peer_notif, bonding_store_num_peer_notif);
931 static DEVICE_ATTR(num_unsol_na, S_IRUGO | S_IWUSR,
932 bonding_show_num_peer_notif, bonding_store_num_peer_notif);
933
934 /*
935 * Show and set the MII monitor interval. There are two tricky bits
936 * here. First, if MII monitoring is activated, then we must disable
937 * ARP monitoring. Second, if the timer isn't running, we must
938 * start it.
939 */
940 static ssize_t bonding_show_miimon(struct device *d,
941 struct device_attribute *attr,
942 char *buf)
943 {
944 struct bonding *bond = to_bond(d);
945
946 return sprintf(buf, "%d\n", bond->params.miimon);
947 }
948
949 static ssize_t bonding_store_miimon(struct device *d,
950 struct device_attribute *attr,
951 const char *buf, size_t count)
952 {
953 int new_value, ret = count;
954 struct bonding *bond = to_bond(d);
955
956 if (!rtnl_trylock())
957 return restart_syscall();
958 if (sscanf(buf, "%d", &new_value) != 1) {
959 pr_err("%s: no miimon value specified.\n",
960 bond->dev->name);
961 ret = -EINVAL;
962 goto out;
963 }
964 if (new_value < 0) {
965 pr_err("%s: Invalid miimon value %d not in range %d-%d; rejected.\n",
966 bond->dev->name, new_value, 1, INT_MAX);
967 ret = -EINVAL;
968 goto out;
969 } else {
970 pr_info("%s: Setting MII monitoring interval to %d.\n",
971 bond->dev->name, new_value);
972 bond->params.miimon = new_value;
973 if (bond->params.updelay)
974 pr_info("%s: Note: Updating updelay (to %d) since it is a multiple of the miimon value.\n",
975 bond->dev->name,
976 bond->params.updelay * bond->params.miimon);
977 if (bond->params.downdelay)
978 pr_info("%s: Note: Updating downdelay (to %d) since it is a multiple of the miimon value.\n",
979 bond->dev->name,
980 bond->params.downdelay * bond->params.miimon);
981 if (bond->params.arp_interval) {
982 pr_info("%s: MII monitoring cannot be used with ARP monitoring. Disabling ARP monitoring...\n",
983 bond->dev->name);
984 bond->params.arp_interval = 0;
985 if (bond->params.arp_validate) {
986 bond->params.arp_validate =
987 BOND_ARP_VALIDATE_NONE;
988 }
989 }
990
991 if (bond->dev->flags & IFF_UP) {
992 /* If the interface is up, we may need to fire off
993 * the MII timer. If the interface is down, the
994 * timer will get fired off when the open function
995 * is called.
996 */
997 cancel_delayed_work_sync(&bond->arp_work);
998 queue_delayed_work(bond->wq, &bond->mii_work, 0);
999 }
1000 }
1001 out:
1002 rtnl_unlock();
1003 return ret;
1004 }
1005 static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR,
1006 bonding_show_miimon, bonding_store_miimon);
1007
1008 /*
1009 * Show and set the primary slave. The store function is much
1010 * simpler than bonding_store_slaves function because it only needs to
1011 * handle one interface name.
1012 * The bond must be a mode that supports a primary for this be
1013 * set.
1014 */
1015 static ssize_t bonding_show_primary(struct device *d,
1016 struct device_attribute *attr,
1017 char *buf)
1018 {
1019 int count = 0;
1020 struct bonding *bond = to_bond(d);
1021
1022 if (bond->primary_slave)
1023 count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);
1024
1025 return count;
1026 }
1027
1028 static ssize_t bonding_store_primary(struct device *d,
1029 struct device_attribute *attr,
1030 const char *buf, size_t count)
1031 {
1032 int i;
1033 struct slave *slave;
1034 struct bonding *bond = to_bond(d);
1035 char ifname[IFNAMSIZ];
1036
1037 if (!rtnl_trylock())
1038 return restart_syscall();
1039 block_netpoll_tx();
1040 read_lock(&bond->lock);
1041 write_lock_bh(&bond->curr_slave_lock);
1042
1043 if (!USES_PRIMARY(bond->params.mode)) {
1044 pr_info("%s: Unable to set primary slave; %s is in mode %d\n",
1045 bond->dev->name, bond->dev->name, bond->params.mode);
1046 goto out;
1047 }
1048
1049 sscanf(buf, "%15s", ifname); /* IFNAMSIZ */
1050
1051 /* check to see if we are clearing primary */
1052 if (!strlen(ifname) || buf[0] == '\n') {
1053 pr_info("%s: Setting primary slave to None.\n",
1054 bond->dev->name);
1055 bond->primary_slave = NULL;
1056 bond_select_active_slave(bond);
1057 goto out;
1058 }
1059
1060 bond_for_each_slave(bond, slave, i) {
1061 if (strncmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
1062 pr_info("%s: Setting %s as primary slave.\n",
1063 bond->dev->name, slave->dev->name);
1064 bond->primary_slave = slave;
1065 strcpy(bond->params.primary, slave->dev->name);
1066 bond_select_active_slave(bond);
1067 goto out;
1068 }
1069 }
1070
1071 strncpy(bond->params.primary, ifname, IFNAMSIZ);
1072 bond->params.primary[IFNAMSIZ - 1] = 0;
1073
1074 pr_info("%s: Recording %s as primary, "
1075 "but it has not been enslaved to %s yet.\n",
1076 bond->dev->name, ifname, bond->dev->name);
1077 out:
1078 write_unlock_bh(&bond->curr_slave_lock);
1079 read_unlock(&bond->lock);
1080 unblock_netpoll_tx();
1081 rtnl_unlock();
1082
1083 return count;
1084 }
1085 static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR,
1086 bonding_show_primary, bonding_store_primary);
1087
1088 /*
1089 * Show and set the primary_reselect flag.
1090 */
1091 static ssize_t bonding_show_primary_reselect(struct device *d,
1092 struct device_attribute *attr,
1093 char *buf)
1094 {
1095 struct bonding *bond = to_bond(d);
1096
1097 return sprintf(buf, "%s %d\n",
1098 pri_reselect_tbl[bond->params.primary_reselect].modename,
1099 bond->params.primary_reselect);
1100 }
1101
1102 static ssize_t bonding_store_primary_reselect(struct device *d,
1103 struct device_attribute *attr,
1104 const char *buf, size_t count)
1105 {
1106 int new_value, ret = count;
1107 struct bonding *bond = to_bond(d);
1108
1109 if (!rtnl_trylock())
1110 return restart_syscall();
1111
1112 new_value = bond_parse_parm(buf, pri_reselect_tbl);
1113 if (new_value < 0) {
1114 pr_err("%s: Ignoring invalid primary_reselect value %.*s.\n",
1115 bond->dev->name,
1116 (int) strlen(buf) - 1, buf);
1117 ret = -EINVAL;
1118 goto out;
1119 }
1120
1121 bond->params.primary_reselect = new_value;
1122 pr_info("%s: setting primary_reselect to %s (%d).\n",
1123 bond->dev->name, pri_reselect_tbl[new_value].modename,
1124 new_value);
1125
1126 block_netpoll_tx();
1127 read_lock(&bond->lock);
1128 write_lock_bh(&bond->curr_slave_lock);
1129 bond_select_active_slave(bond);
1130 write_unlock_bh(&bond->curr_slave_lock);
1131 read_unlock(&bond->lock);
1132 unblock_netpoll_tx();
1133 out:
1134 rtnl_unlock();
1135 return ret;
1136 }
1137 static DEVICE_ATTR(primary_reselect, S_IRUGO | S_IWUSR,
1138 bonding_show_primary_reselect,
1139 bonding_store_primary_reselect);
1140
1141 /*
1142 * Show and set the use_carrier flag.
1143 */
1144 static ssize_t bonding_show_carrier(struct device *d,
1145 struct device_attribute *attr,
1146 char *buf)
1147 {
1148 struct bonding *bond = to_bond(d);
1149
1150 return sprintf(buf, "%d\n", bond->params.use_carrier);
1151 }
1152
1153 static ssize_t bonding_store_carrier(struct device *d,
1154 struct device_attribute *attr,
1155 const char *buf, size_t count)
1156 {
1157 int new_value, ret = count;
1158 struct bonding *bond = to_bond(d);
1159
1160
1161 if (sscanf(buf, "%d", &new_value) != 1) {
1162 pr_err("%s: no use_carrier value specified.\n",
1163 bond->dev->name);
1164 ret = -EINVAL;
1165 goto out;
1166 }
1167 if ((new_value == 0) || (new_value == 1)) {
1168 bond->params.use_carrier = new_value;
1169 pr_info("%s: Setting use_carrier to %d.\n",
1170 bond->dev->name, new_value);
1171 } else {
1172 pr_info("%s: Ignoring invalid use_carrier value %d.\n",
1173 bond->dev->name, new_value);
1174 }
1175 out:
1176 return ret;
1177 }
1178 static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR,
1179 bonding_show_carrier, bonding_store_carrier);
1180
1181
1182 /*
1183 * Show and set currently active_slave.
1184 */
1185 static ssize_t bonding_show_active_slave(struct device *d,
1186 struct device_attribute *attr,
1187 char *buf)
1188 {
1189 struct slave *curr;
1190 struct bonding *bond = to_bond(d);
1191 int count = 0;
1192
1193 read_lock(&bond->curr_slave_lock);
1194 curr = bond->curr_active_slave;
1195 read_unlock(&bond->curr_slave_lock);
1196
1197 if (USES_PRIMARY(bond->params.mode) && curr)
1198 count = sprintf(buf, "%s\n", curr->dev->name);
1199 return count;
1200 }
1201
1202 static ssize_t bonding_store_active_slave(struct device *d,
1203 struct device_attribute *attr,
1204 const char *buf, size_t count)
1205 {
1206 int i;
1207 struct slave *slave;
1208 struct slave *old_active = NULL;
1209 struct slave *new_active = NULL;
1210 struct bonding *bond = to_bond(d);
1211 char ifname[IFNAMSIZ];
1212
1213 if (!rtnl_trylock())
1214 return restart_syscall();
1215
1216 block_netpoll_tx();
1217 read_lock(&bond->lock);
1218 write_lock_bh(&bond->curr_slave_lock);
1219
1220 if (!USES_PRIMARY(bond->params.mode)) {
1221 pr_info("%s: Unable to change active slave; %s is in mode %d\n",
1222 bond->dev->name, bond->dev->name, bond->params.mode);
1223 goto out;
1224 }
1225
1226 sscanf(buf, "%15s", ifname); /* IFNAMSIZ */
1227
1228 /* check to see if we are clearing active */
1229 if (!strlen(ifname) || buf[0] == '\n') {
1230 pr_info("%s: Clearing current active slave.\n",
1231 bond->dev->name);
1232 bond->curr_active_slave = NULL;
1233 bond_select_active_slave(bond);
1234 goto out;
1235 }
1236
1237 bond_for_each_slave(bond, slave, i) {
1238 if (strncmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
1239 old_active = bond->curr_active_slave;
1240 new_active = slave;
1241 if (new_active == old_active) {
1242 /* do nothing */
1243 pr_info("%s: %s is already the current"
1244 " active slave.\n",
1245 bond->dev->name,
1246 slave->dev->name);
1247 goto out;
1248 }
1249 else {
1250 if ((new_active) &&
1251 (old_active) &&
1252 (new_active->link == BOND_LINK_UP) &&
1253 IS_UP(new_active->dev)) {
1254 pr_info("%s: Setting %s as active"
1255 " slave.\n",
1256 bond->dev->name,
1257 slave->dev->name);
1258 bond_change_active_slave(bond,
1259 new_active);
1260 }
1261 else {
1262 pr_info("%s: Could not set %s as"
1263 " active slave; either %s is"
1264 " down or the link is down.\n",
1265 bond->dev->name,
1266 slave->dev->name,
1267 slave->dev->name);
1268 }
1269 goto out;
1270 }
1271 }
1272 }
1273
1274 pr_info("%s: Unable to set %.*s as active slave.\n",
1275 bond->dev->name, (int)strlen(buf) - 1, buf);
1276 out:
1277 write_unlock_bh(&bond->curr_slave_lock);
1278 read_unlock(&bond->lock);
1279 unblock_netpoll_tx();
1280
1281 rtnl_unlock();
1282
1283 return count;
1284
1285 }
1286 static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR,
1287 bonding_show_active_slave, bonding_store_active_slave);
1288
1289
1290 /*
1291 * Show link status of the bond interface.
1292 */
1293 static ssize_t bonding_show_mii_status(struct device *d,
1294 struct device_attribute *attr,
1295 char *buf)
1296 {
1297 struct slave *curr;
1298 struct bonding *bond = to_bond(d);
1299
1300 read_lock(&bond->curr_slave_lock);
1301 curr = bond->curr_active_slave;
1302 read_unlock(&bond->curr_slave_lock);
1303
1304 return sprintf(buf, "%s\n", curr ? "up" : "down");
1305 }
1306 static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
1307
1308
1309 /*
1310 * Show current 802.3ad aggregator ID.
1311 */
1312 static ssize_t bonding_show_ad_aggregator(struct device *d,
1313 struct device_attribute *attr,
1314 char *buf)
1315 {
1316 int count = 0;
1317 struct bonding *bond = to_bond(d);
1318
1319 if (bond->params.mode == BOND_MODE_8023AD) {
1320 struct ad_info ad_info;
1321 count = sprintf(buf, "%d\n",
1322 (bond_3ad_get_active_agg_info(bond, &ad_info))
1323 ? 0 : ad_info.aggregator_id);
1324 }
1325
1326 return count;
1327 }
1328 static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL);
1329
1330
1331 /*
1332 * Show number of active 802.3ad ports.
1333 */
1334 static ssize_t bonding_show_ad_num_ports(struct device *d,
1335 struct device_attribute *attr,
1336 char *buf)
1337 {
1338 int count = 0;
1339 struct bonding *bond = to_bond(d);
1340
1341 if (bond->params.mode == BOND_MODE_8023AD) {
1342 struct ad_info ad_info;
1343 count = sprintf(buf, "%d\n",
1344 (bond_3ad_get_active_agg_info(bond, &ad_info))
1345 ? 0 : ad_info.ports);
1346 }
1347
1348 return count;
1349 }
1350 static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL);
1351
1352
1353 /*
1354 * Show current 802.3ad actor key.
1355 */
1356 static ssize_t bonding_show_ad_actor_key(struct device *d,
1357 struct device_attribute *attr,
1358 char *buf)
1359 {
1360 int count = 0;
1361 struct bonding *bond = to_bond(d);
1362
1363 if (bond->params.mode == BOND_MODE_8023AD) {
1364 struct ad_info ad_info;
1365 count = sprintf(buf, "%d\n",
1366 (bond_3ad_get_active_agg_info(bond, &ad_info))
1367 ? 0 : ad_info.actor_key);
1368 }
1369
1370 return count;
1371 }
1372 static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL);
1373
1374
1375 /*
1376 * Show current 802.3ad partner key.
1377 */
1378 static ssize_t bonding_show_ad_partner_key(struct device *d,
1379 struct device_attribute *attr,
1380 char *buf)
1381 {
1382 int count = 0;
1383 struct bonding *bond = to_bond(d);
1384
1385 if (bond->params.mode == BOND_MODE_8023AD) {
1386 struct ad_info ad_info;
1387 count = sprintf(buf, "%d\n",
1388 (bond_3ad_get_active_agg_info(bond, &ad_info))
1389 ? 0 : ad_info.partner_key);
1390 }
1391
1392 return count;
1393 }
1394 static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL);
1395
1396
1397 /*
1398 * Show current 802.3ad partner mac.
1399 */
1400 static ssize_t bonding_show_ad_partner_mac(struct device *d,
1401 struct device_attribute *attr,
1402 char *buf)
1403 {
1404 int count = 0;
1405 struct bonding *bond = to_bond(d);
1406
1407 if (bond->params.mode == BOND_MODE_8023AD) {
1408 struct ad_info ad_info;
1409 if (!bond_3ad_get_active_agg_info(bond, &ad_info))
1410 count = sprintf(buf, "%pM\n", ad_info.partner_system);
1411 }
1412
1413 return count;
1414 }
1415 static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
1416
1417 /*
1418 * Show the queue_ids of the slaves in the current bond.
1419 */
1420 static ssize_t bonding_show_queue_id(struct device *d,
1421 struct device_attribute *attr,
1422 char *buf)
1423 {
1424 struct slave *slave;
1425 int i, res = 0;
1426 struct bonding *bond = to_bond(d);
1427
1428 if (!rtnl_trylock())
1429 return restart_syscall();
1430
1431 read_lock(&bond->lock);
1432 bond_for_each_slave(bond, slave, i) {
1433 if (res > (PAGE_SIZE - IFNAMSIZ - 6)) {
1434 /* not enough space for another interface_name:queue_id pair */
1435 if ((PAGE_SIZE - res) > 10)
1436 res = PAGE_SIZE - 10;
1437 res += sprintf(buf + res, "++more++ ");
1438 break;
1439 }
1440 res += sprintf(buf + res, "%s:%d ",
1441 slave->dev->name, slave->queue_id);
1442 }
1443 read_unlock(&bond->lock);
1444 if (res)
1445 buf[res-1] = '\n'; /* eat the leftover space */
1446 rtnl_unlock();
1447 return res;
1448 }
1449
1450 /*
1451 * Set the queue_ids of the slaves in the current bond. The bond
1452 * interface must be enslaved for this to work.
1453 */
1454 static ssize_t bonding_store_queue_id(struct device *d,
1455 struct device_attribute *attr,
1456 const char *buffer, size_t count)
1457 {
1458 struct slave *slave, *update_slave;
1459 struct bonding *bond = to_bond(d);
1460 u16 qid;
1461 int i, ret = count;
1462 char *delim;
1463 struct net_device *sdev = NULL;
1464
1465 if (!rtnl_trylock())
1466 return restart_syscall();
1467
1468 /* delim will point to queue id if successful */
1469 delim = strchr(buffer, ':');
1470 if (!delim)
1471 goto err_no_cmd;
1472
1473 /*
1474 * Terminate string that points to device name and bump it
1475 * up one, so we can read the queue id there.
1476 */
1477 *delim = '\0';
1478 if (sscanf(++delim, "%hd\n", &qid) != 1)
1479 goto err_no_cmd;
1480
1481 /* Check buffer length, valid ifname and queue id */
1482 if (strlen(buffer) > IFNAMSIZ ||
1483 !dev_valid_name(buffer) ||
1484 qid > bond->dev->real_num_tx_queues)
1485 goto err_no_cmd;
1486
1487 /* Get the pointer to that interface if it exists */
1488 sdev = __dev_get_by_name(dev_net(bond->dev), buffer);
1489 if (!sdev)
1490 goto err_no_cmd;
1491
1492 read_lock(&bond->lock);
1493
1494 /* Search for thes slave and check for duplicate qids */
1495 update_slave = NULL;
1496 bond_for_each_slave(bond, slave, i) {
1497 if (sdev == slave->dev)
1498 /*
1499 * We don't need to check the matching
1500 * slave for dups, since we're overwriting it
1501 */
1502 update_slave = slave;
1503 else if (qid && qid == slave->queue_id) {
1504 goto err_no_cmd_unlock;
1505 }
1506 }
1507
1508 if (!update_slave)
1509 goto err_no_cmd_unlock;
1510
1511 /* Actually set the qids for the slave */
1512 update_slave->queue_id = qid;
1513
1514 read_unlock(&bond->lock);
1515 out:
1516 rtnl_unlock();
1517 return ret;
1518
1519 err_no_cmd_unlock:
1520 read_unlock(&bond->lock);
1521 err_no_cmd:
1522 pr_info("invalid input for queue_id set for %s.\n",
1523 bond->dev->name);
1524 ret = -EPERM;
1525 goto out;
1526 }
1527
1528 static DEVICE_ATTR(queue_id, S_IRUGO | S_IWUSR, bonding_show_queue_id,
1529 bonding_store_queue_id);
1530
1531
1532 /*
1533 * Show and set the all_slaves_active flag.
1534 */
1535 static ssize_t bonding_show_slaves_active(struct device *d,
1536 struct device_attribute *attr,
1537 char *buf)
1538 {
1539 struct bonding *bond = to_bond(d);
1540
1541 return sprintf(buf, "%d\n", bond->params.all_slaves_active);
1542 }
1543
1544 static ssize_t bonding_store_slaves_active(struct device *d,
1545 struct device_attribute *attr,
1546 const char *buf, size_t count)
1547 {
1548 int i, new_value, ret = count;
1549 struct bonding *bond = to_bond(d);
1550 struct slave *slave;
1551
1552 if (sscanf(buf, "%d", &new_value) != 1) {
1553 pr_err("%s: no all_slaves_active value specified.\n",
1554 bond->dev->name);
1555 ret = -EINVAL;
1556 goto out;
1557 }
1558
1559 if (new_value == bond->params.all_slaves_active)
1560 goto out;
1561
1562 if ((new_value == 0) || (new_value == 1)) {
1563 bond->params.all_slaves_active = new_value;
1564 } else {
1565 pr_info("%s: Ignoring invalid all_slaves_active value %d.\n",
1566 bond->dev->name, new_value);
1567 ret = -EINVAL;
1568 goto out;
1569 }
1570
1571 read_lock(&bond->lock);
1572 bond_for_each_slave(bond, slave, i) {
1573 if (!bond_is_active_slave(slave)) {
1574 if (new_value)
1575 slave->inactive = 0;
1576 else
1577 slave->inactive = 1;
1578 }
1579 }
1580 read_unlock(&bond->lock);
1581 out:
1582 return ret;
1583 }
1584 static DEVICE_ATTR(all_slaves_active, S_IRUGO | S_IWUSR,
1585 bonding_show_slaves_active, bonding_store_slaves_active);
1586
1587 /*
1588 * Show and set the number of IGMP membership reports to send on link failure
1589 */
1590 static ssize_t bonding_show_resend_igmp(struct device *d,
1591 struct device_attribute *attr,
1592 char *buf)
1593 {
1594 struct bonding *bond = to_bond(d);
1595
1596 return sprintf(buf, "%d\n", bond->params.resend_igmp);
1597 }
1598
1599 static ssize_t bonding_store_resend_igmp(struct device *d,
1600 struct device_attribute *attr,
1601 const char *buf, size_t count)
1602 {
1603 int new_value, ret = count;
1604 struct bonding *bond = to_bond(d);
1605
1606 if (sscanf(buf, "%d", &new_value) != 1) {
1607 pr_err("%s: no resend_igmp value specified.\n",
1608 bond->dev->name);
1609 ret = -EINVAL;
1610 goto out;
1611 }
1612
1613 if (new_value < 0 || new_value > 255) {
1614 pr_err("%s: Invalid resend_igmp value %d not in range 0-255; rejected.\n",
1615 bond->dev->name, new_value);
1616 ret = -EINVAL;
1617 goto out;
1618 }
1619
1620 pr_info("%s: Setting resend_igmp to %d.\n",
1621 bond->dev->name, new_value);
1622 bond->params.resend_igmp = new_value;
1623 out:
1624 return ret;
1625 }
1626
1627 static DEVICE_ATTR(resend_igmp, S_IRUGO | S_IWUSR,
1628 bonding_show_resend_igmp, bonding_store_resend_igmp);
1629
1630 static struct attribute *per_bond_attrs[] = {
1631 &dev_attr_slaves.attr,
1632 &dev_attr_mode.attr,
1633 &dev_attr_fail_over_mac.attr,
1634 &dev_attr_arp_validate.attr,
1635 &dev_attr_arp_interval.attr,
1636 &dev_attr_arp_ip_target.attr,
1637 &dev_attr_downdelay.attr,
1638 &dev_attr_updelay.attr,
1639 &dev_attr_lacp_rate.attr,
1640 &dev_attr_ad_select.attr,
1641 &dev_attr_xmit_hash_policy.attr,
1642 &dev_attr_num_grat_arp.attr,
1643 &dev_attr_num_unsol_na.attr,
1644 &dev_attr_miimon.attr,
1645 &dev_attr_primary.attr,
1646 &dev_attr_primary_reselect.attr,
1647 &dev_attr_use_carrier.attr,
1648 &dev_attr_active_slave.attr,
1649 &dev_attr_mii_status.attr,
1650 &dev_attr_ad_aggregator.attr,
1651 &dev_attr_ad_num_ports.attr,
1652 &dev_attr_ad_actor_key.attr,
1653 &dev_attr_ad_partner_key.attr,
1654 &dev_attr_ad_partner_mac.attr,
1655 &dev_attr_queue_id.attr,
1656 &dev_attr_all_slaves_active.attr,
1657 &dev_attr_resend_igmp.attr,
1658 &dev_attr_min_links.attr,
1659 NULL,
1660 };
1661
1662 static struct attribute_group bonding_group = {
1663 .name = "bonding",
1664 .attrs = per_bond_attrs,
1665 };
1666
1667 /*
1668 * Initialize sysfs. This sets up the bonding_masters file in
1669 * /sys/class/net.
1670 */
1671 int bond_create_sysfs(struct bond_net *bn)
1672 {
1673 int ret;
1674
1675 bn->class_attr_bonding_masters = class_attr_bonding_masters;
1676 sysfs_attr_init(&bn->class_attr_bonding_masters.attr);
1677
1678 ret = netdev_class_create_file(&bn->class_attr_bonding_masters);
1679 /*
1680 * Permit multiple loads of the module by ignoring failures to
1681 * create the bonding_masters sysfs file. Bonding devices
1682 * created by second or subsequent loads of the module will
1683 * not be listed in, or controllable by, bonding_masters, but
1684 * will have the usual "bonding" sysfs directory.
1685 *
1686 * This is done to preserve backwards compatibility for
1687 * initscripts/sysconfig, which load bonding multiple times to
1688 * configure multiple bonding devices.
1689 */
1690 if (ret == -EEXIST) {
1691 /* Is someone being kinky and naming a device bonding_master? */
1692 if (__dev_get_by_name(bn->net,
1693 class_attr_bonding_masters.attr.name))
1694 pr_err("network device named %s already exists in sysfs",
1695 class_attr_bonding_masters.attr.name);
1696 ret = 0;
1697 }
1698
1699 return ret;
1700
1701 }
1702
1703 /*
1704 * Remove /sys/class/net/bonding_masters.
1705 */
1706 void bond_destroy_sysfs(struct bond_net *bn)
1707 {
1708 netdev_class_remove_file(&bn->class_attr_bonding_masters);
1709 }
1710
1711 /*
1712 * Initialize sysfs for each bond. This sets up and registers
1713 * the 'bondctl' directory for each individual bond under /sys/class/net.
1714 */
1715 void bond_prepare_sysfs_group(struct bonding *bond)
1716 {
1717 bond->dev->sysfs_groups[0] = &bonding_group;
1718 }
1719
Linux kernel - Deliverables
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